[SERVER] iscsi refactor: First working version

Work towards simplifying the iscsi implementation has begun. Goals are:
- Simpler and easier to understand resource/lifecycle management of
  allocations
- Single-threaded architecture, making locking unnecessary
- Moving as many allocations as possible to the stack
- Making the call-stack more shallow for easier tracking of code flow

9 files changed, 2732 insertions, 18065 deletions

diff --git a/src/server/image.c b/src/server/image.c
index a2ff247..5d1f4a1 100644
--- a/src/server/image.c
+++ b/src/server/image.c
@@ -1361,7 +1361,7 @@ server_fail: ;
 		image_release( image );
 	}
 	// If everything worked out, this call should now actually return the image
-	image = image_get( name, acceptedRemoteRid, false );
+	image = image_get( name, revision == 0 ? acceptedRemoteRid : revision, false );
 	if ( image != NULL && uplinkSock != -1 ) {
 		// If so, init the uplink and pass it the socket
 		if ( !uplink_init( image, uplinkSock, &uplinkServer, remoteProtocolVersion ) ) {
diff --git a/src/server/iscsi.c b/src/server/iscsi.c
index e9b0fc1..2b39955 100644
--- a/src/server/iscsi.c
+++ b/src/server/iscsi.c
@@ -20,7 +20,6 @@
 
 #include <ctype.h>
 #include <errno.h>
-#include <fnmatch.h>
 #include <stdarg.h>
 #include <stdbool.h>
 #include <stddef.h>
@@ -36,20 +35,22 @@
 #include <dnbd3/shared/sockhelper.h>
 #include <dnbd3/types.h>
 #include <pthread.h>
-#include <time.h>
 #include <unistd.h>
 
-#include "fileutil.h"
 #include "globals.h"
 #include "helper.h"
 #include "image.h"
-#include "ini.h"
 #include "iscsi.h"
-#include "locks.h"
 #include "uplink.h"
-#include "threadpool.h"
 #include "reference.h"
 
+#include <assert.h>
+
+#define ISCSI_DEFAULT_LUN 1
+#define ISCSI_DEFAULT_PROTOCOL_ID 1
+#define ISCSI_DEFAULT_DEVICE_ID 1
+#define ISCSI_DEFAULT_QUEUE_DEPTH 16
+
 /**
  * @file iscsi.c
  * @author Sebastian Vater
@@ -63,102 +64,56 @@
  * @see https://www.rfc-editor.org/rfc/rfc7143
  */
 
+//#define malloc(x) (rand() % 100 == 0 ? NULL : malloc(x))
 
-/**
- * @brief Allocates and appends a buffer and sprintf's it.
- *
- * Merges multiple strings using printf style formatting
- * and allocates memory for holding the result.
- *
- * @param[in] buf Buffer to merge into.
- * @param[in] format printf style format string.
- * @param[in] args Values to fill in the format with.
- * @return New buffer which holds the final result.
- */
-uint8_t *iscsi_vsprintf_append_realloc(char *buf, const char *format, va_list args)
-{
-	va_list args_copy;
-	uint orig_size = 0U;
 
-	if ( buf != NULL )
-		orig_size = (uint) strlen( (char *) buf );
+static int iscsi_scsi_emu_block_process(iscsi_scsi_task *scsi_task);
 
-	va_copy( args_copy, args );
-	uint new_size = vsnprintf( NULL, 0, format, args_copy );
-	va_end( args_copy );
+static int iscsi_scsi_emu_primary_process(iscsi_scsi_task *scsi_task);
 
-	new_size += (uint) (orig_size + 1U);
 
-	uint8_t *new_buf = realloc( buf, new_size );
+static void iscsi_scsi_task_create(iscsi_scsi_task *scsi_task); // Allocates and initializes a SCSI task
 
-	if ( new_buf == NULL ) {
-		logadd( LOG_ERROR, "iscsi_vsprintf_append_realloc: Out of memory while allocating string buffer" );
+static void iscsi_scsi_task_xfer_complete(iscsi_scsi_task *scsi_task, iscsi_pdu *pdu); // Callback function when an iSCSI SCSI task completed the data transfer
 
-		return NULL;
-	}
+static void iscsi_scsi_task_lun_process_none(iscsi_scsi_task *scsi_task); // Processes a iSCSI SCSI task with no LUN identifier
 
-	vsnprintf( (char *) (new_buf + orig_size), (new_size - orig_size), format, args );
 
-	return new_buf;
-}
+static uint64_t iscsi_scsi_lun_get_from_scsi(const int lun_id); // Converts an internal representation of a LUN identifier to an iSCSI LUN required for packet data
+static int iscsi_scsi_lun_get_from_iscsi(const uint64_t lun); // Converts an iSCSI LUN from packet data to internal SCSI LUN identifier
 
-/**
- * @brief Allocates and appends a buffer and sprintf's it.
- *
- * Merges strings using printf style formatting and allocates
- * memory for holding the result.
- *
- * @param[in] buf Buffer to merge into.
- * @param[in] format printf style format string.
- * @param[in] ... Values to fill in the format string with.
- * @return New buffer which holds the final result.
- */
-uint8_t *iscsi_sprintf_append_realloc(char *buf, const char *format, ...)
-{
-	va_list args;
+static void iscsi_scsi_lun_task_run( iscsi_scsi_task *scsi_task, iscsi_pdu *pdu); // Runs an iSCSI SCSI task for a specified iSCSI SCSI LUN
 
-	va_start( args, format );
-	uint8_t *ret_buf = iscsi_vsprintf_append_realloc( buf, format, args );
-	va_end( args );
+static int iscsi_scsi_emu_io_blocks_read(iscsi_scsi_task *scsi_task,  dnbd3_image_t *image, const uint64_t offset_blocks, const uint64_t num_blocks); // Reads a number of blocks from a block offset of a DNBD3 image to a specified buffer
 
-	return ret_buf;
-}
 
-/**
- * @brief Allocates a buffer and sprintf's it.
- *
- * Merges strings using printf style formatting and allocates
- * memory for holding the result.
- *
- * @param[in] format printf style format string.
- * @param[in] args Values to fill in the format with.
- * @return New buffer which holds the final result.
- */
-uint8_t *iscsi_vsprintf_alloc(const char *format, va_list args)
-{
-	return iscsi_vsprintf_append_realloc( NULL, format, args );
-}
+static void iscsi_strcpy_pad(char *dst, const char *src, const size_t size, const int pad); // Copies a string with additional padding character to fill in a specified size
 
-/**
- * @brief Allocates a buffer and sprintf's it.
- *
- * Allocates a buffer large enough to hold printf style
- * string concatenation and fills it using vspnrintf.
- *
- * @param[in] format Format string  to allocate and fill.
- * @param[in] ... Values to fill in the format string with.
- * @return New buffer containing the formatted string.
- */
-uint8_t *iscsi_sprintf_alloc(const char *format, ... )
-{
-	va_list args;
 
-	va_start( args, format );
-	uint8_t *buf = iscsi_vsprintf_alloc( format, args );
-	va_end( args );
+static iscsi_task *iscsi_task_create(iscsi_connection *conn); // Allocates and initializes an iSCSI task structure
+static void iscsi_task_destroy(iscsi_task *task); // Deallocates resources acquired by iscsi_task_create
+
+static void iscsi_task_response(iscsi_connection *conn, iscsi_task *task, iscsi_pdu *pdu); // Creates, initializes and sends an iSCSI task reponse PDU.
+
+static uint64_t iscsi_target_node_wwn_get(const uint8_t *name); // Calculates the WWN using 64-bit IEEE Extended NAA for a name
+
+static iscsi_session *iscsi_session_create(iscsi_connection *conn,  const int type); // Creates and initializes an iSCSI session
+static void iscsi_session_destroy(iscsi_session *session); // Deallocates all resources acquired by iscsi_session_create
+
+
+static iscsi_connection *iscsi_connection_create(dnbd3_client_t *client); // Creates data structure for an iSCSI connection from iSCSI portal and TCP/IP socket
+static void iscsi_connection_destroy(iscsi_connection *conn); // Deallocates all resources acquired by iscsi_connection_create
+
+static int32_t iscsi_connection_read(const iscsi_connection *conn, uint8_t *buf, const uint32_t len); // Reads data for the specified iSCSI connection from its TCP socket
+
+static void iscsi_connection_login_response_reject(iscsi_pdu *login_response_pdu, const iscsi_pdu *pdu); // Initializes a rejecting login response packet
+static iscsi_pdu *iscsi_connection_pdu_create(iscsi_connection *conn, const uint32_t ds_len);
+static void iscsi_connection_pdu_destroy(iscsi_pdu *pdu); // Destroys an iSCSI PDU structure used by connections
+
+static iscsi_bhs_packet *iscsi_connection_pdu_resize(iscsi_pdu *pdu, const uint ahs_len,  const uint32_t ds_len); // Appends packet data to an iSCSI PDU structure used by connections
+
+static bool iscsi_connection_pdu_write(iscsi_connection *conn, iscsi_pdu *pdu);
 
-	return buf;
-}
 
 /**
  * @brief Copies a string with additional padding character to fill in a specified size.
@@ -175,7 +130,7 @@ uint8_t *iscsi_sprintf_alloc(const char *format, ... )
  * @param[in] size Total size in bytes for padding.
  * @param[in] pad Padding character to use.
  */
-void iscsi_strcpy_pad(char *dst, const char *src, const size_t size, const int pad)
+static void iscsi_strcpy_pad(char *dst, const char *src, const size_t size, const int pad)
 {
 	const size_t len = strlen( src );
 
@@ -187,2172 +142,46 @@ void iscsi_strcpy_pad(char *dst, const char *src, const size_t size, const int p
 	}
 }
 
-/**
- * @brief Creates an empty hash map with either specified or default capacity.
- *
- * Creates a ultra hardcore speed optimized empty
- * hash map and allocates enough buckets to hold
- * default capacity elements.\n
- * The speed optimizations require all keys
- * having a size of a multiple of 8 bytes with
- * zero padding. Also the capacity always nas
- * to be a power of two.\n
- * TODO: Move all hash map related functions to
- * different source file later and implement in
- * a lock-free way for better concurrency.
- *
- * @param[in] capacity Desired initial capacity, will be rounded up
- * to the nearest power of two. If set to 0, a
- * default capacity of 32 buckets will be used
- * instead.
- * @return A pointer to the hash map structure or NULL in case of an error.
- */
-iscsi_hashmap *iscsi_hashmap_create(const uint capacity)
-{
-	iscsi_hashmap *map = (iscsi_hashmap *) malloc( sizeof(iscsi_hashmap) );
-
-	if ( map == NULL ) {
-		logadd( LOG_ERROR, "iscsi_hashmap_create: Out of memory while allocating iSCSI hash map" );
-
-		return map;
-	}
-
-	if ( capacity > 0U ) {
-		uint new_capacity = (uint) iscsi_align_pow2_ceil( (uint32_t) capacity );
-
-		if ( (capacity + 1U) > (uint) ((new_capacity * 3U) >> 2U) )
-			new_capacity += new_capacity; // If specified capacity does not fit in 75% of requested capacity, double actual size
-
-		map->capacity = new_capacity; // Round up actual new capacity to nearest power of two
-	} else {
-		map->capacity = ISCSI_HASHMAP_DEFAULT_CAPACITY;
-	}
-
-	map->buckets = (iscsi_hashmap_bucket *) calloc( map->capacity, sizeof(struct iscsi_hashmap_bucket) );
-
-	if ( map->buckets == NULL ) {
-		free( map );
-
-		logadd( LOG_ERROR, "iscsi_hashmap_create: Out of memory while allocating iSCSI hash map buckets" );
-
-		return NULL;
-	}
-
-	iscsi_list_create( &map->list );
-
-	map->last_insert_id = 0ULL;
-	map->cap_load       = (uint) ((map->capacity * 3U) >> 2U); // 75% of capacity
-	map->count          = 0U;
-
-	return map;
-}
-
-/**
- * @brief Deallocates the hash map objects and buckets, not elements. Use iscsi_hashmap_iterate to deallocate the elements themselves.
- *
- * Deallocates all buckets and the hash map itself
- * allocated by iscsi_hashmap_create. The elements
- * associated with the buckets are NOT freed by this
- * function, this has to be done either manually or
- * using the function iscsi_hashmap_iterate.
- *
- * @param[in] map Pointer to hash map and its buckets to deallocate.
- * If this is NULL, nothing is done.
- */
-void iscsi_hashmap_destroy(iscsi_hashmap *map)
-{
-	if ( map != NULL ) {
-		if ( map->buckets != NULL ) {
-			free( map->buckets );
-
-			map->buckets = NULL;
-		}
-
-		free( map );
-	}
-}
-
-/**
- * @brief Creates a key suitable for hash map usage (ensures 8-byte boundary and zero padding).
- *
- * Creates a key from data and size and ensures
- * its requirements for usage in hash map buckets.\n
- * Currently keys to be used in a hash map bucket
- * require a size of multiple by 8 bytes with
- * the zero padding.
- *
- * @param[in] data Pointer to data to construct the key
- * from and may NOT be NULL, so be careful.
- * @param[in] len Length of the data to construct the key
- * from, MUST be larger than 0, so be careful.
- * @return Pointer to generated usable key or NULL in
- * case of an error (usually memory exhaustion).
- */
-uint8_t *iscsi_hashmap_key_create(const uint8_t *data, const size_t len)
-{
-	const size_t key_size = ISCSI_ALIGN(len, ISCSI_HASHMAP_KEY_ALIGN);
-	uint8_t *key          = (uint8_t *) malloc( key_size );
-
-	if ( key == NULL ) {
-		logadd( LOG_ERROR, "iscsi_hashmap_key_create: Out of memory while allocating iSCSI hash map key" );
-
-		return key;
-	}
-
-	memcpy( key, data, len );
-	memset( (key + len), 0, (key_size - len) ); // Zero pad additional bytes in case length is not a multiple of 8
-
-	return key;
-}
-
-/**
- * @brief Creates an unique key identifier suitable for hash map usage (ensures 8-byte boundary and zero padding).
- *
- * Creates a unique key identifier by adding
- * the capacity and element count plus one
- * together as an unsigned 64-bit integer
- * and uses the resulting value as key data
- * which ensure the requirements for usage
- * in hash map buckets.\n
- * This function returns the same identifier if
- * the previously generated key identifier has
- * NOT been added to the hash map yet.\n
- * Currently keys to be used in a hash map bucket
- * require a size of multiple by 8 bytes with
- * the zero padding.
- *
- * @param[in] map Pointer to hash map to construct the key
- * for and may NOT be NULL, so be careful.
- * @param[out] key Pointer to key to store the
- * unique key in. NULL is NOT allowed here, be
- * careful.
- */
-void iscsi_hashmap_key_create_id(iscsi_hashmap *map, uint64_t *key)
-{
-	*key = ++map->last_insert_id;
-}
-
-/**
- * @brief Deallocates all resources acquired by iscsi_hashmap_create_key.
- *
- * Deallocates a key allocated with the function
- * iscsi_hashmap_key_create.
- *
- * @param[in] key Pointer to key to deallocate, may NOT
- * be NULL, so be careful.
- */
-void iscsi_hashmap_key_destroy(uint8_t *key)
-{
-	free( key );
-}
-
-/**
- * @brief Deallocates a key in a hash map.
- *
- * Default callback function for deallocation of
- * hash map resources by simply deallocating
- * the key.
- *
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] value Value of the key, not used here.
- * @param[in,out] user_data This argument is not used by
- * this function and should be always NULL for now, as
- * there is a possibility for future usage.
- * @return Always returns 0 as this function cannot fail.
- */
-int iscsi_hashmap_key_destroy_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data)
-{
-	iscsi_hashmap_key_destroy( key );
-
-	return 0;
-}
-
-/**
- * @brief Deallocates a value in a hash map.
- *
- * Default callback function for deallocation of
- * hash map resources by simply deallocating
- * the value.
- *
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] value Value of the key, NULL is allowed.
- * @param[in,out] user_data This argument is not used by
- * this function and should be always NULL for now, as
- * there is a possibility for future usage.
- * @return Always returns 0 as this function cannot fail.
- */
-int iscsi_hashmap_destroy_value_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data)
-{
-	if ( value != NULL )
-		free( value );
-
-	return 0;
-}
-
-/**
- * @brief Deallocates a key / value pair in a hash map by calling free (default destructor).
- *
- * Default callback function for deallocation of
- * allocated hash map resources by simply calling
- * free.
- *
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key,
- * @param[in] value Value of the key, NULL is allowed.
- * @param[in,out] user_data This argument is not used by
- * this function and should be always NULL for now, as
- * there is a possibility for future usage.
- * @return Always returns 0 as this function cannot fail.
- */
-int iscsi_hashmap_key_destroy_value_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data)
-{
-	if ( value != NULL )
-		free( value );
-
-	iscsi_hashmap_key_destroy( key );
-
-	return 0;
-}
-
-/**
- * @brief Compares two hash keys with equal length match.
- *
- * This function is optimized to compare
- * 8 bytes at once and requires number
- * of blocks specified in QWORDs. Both
- * keys must be equal in size of a
- * QWORD alignment.
- *
- * @param[in] buf Pointer to key buffer of which key
- * to compare. May NOT be NULL, so be
- * careful.
- * @param[in] key Pointer to key to compare with.
- * NULL is NOT allowed here, take
- * caution.
- * @param[in] num_blocks Number of blocks in QWORDs (8 bytes)
- * to be compared.
- */
-static inline bool iscsi_hashmap_key_eq(const uint64_t *buf, const uint64_t *key, size_t num_blocks)
-{
-	do {
-		if ( *buf++ != *key++ )
-			return false;
-	} while ( --num_blocks > 0UL );
-
-	return true;
-}
-
-/**
- * @brief Finds a bucket by key of a specified hash map by key, key size and hash code.
- *
- * Finds a bucket by key of a specified hash map by
- * key, key size and hash code. This function may
- * only be called if the bucket is guaranteed to
- * be found, otherwise this function hangs, so be
- * careful.
- *
- * @param[in] map Pointer to hash map where the key to be
- * searched for is located, may NOT be NULL, so be careful.
- * @param[in] key Pointer to key. NULL is invalid, so be
- * careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] hash Hash of the key to be searched for.
- * @return Pointer to found bucket.
- */
-static iscsi_hashmap_bucket *iscsi_hashmap_find_entry(iscsi_hashmap *map, const uint8_t *key, size_t key_size, uint32_t hash)
-{
-	const size_t num_blocks = ISCSI_ALIGN(key_size, ISCSI_HASHMAP_KEY_ALIGN) >> ISCSI_HASHMAP_KEY_ALIGN_SHIFT;
-	uint32_t index          = (hash & (map->capacity - 1U));
-
-	for ( ;; ) {
-		iscsi_hashmap_bucket *entry = &map->buckets[index];
-
-		if ( ((entry->key == NULL) && (entry->value == NULL)) || ((entry->key != NULL) && (entry->key_size == key_size) && (entry->hash == hash) && iscsi_hashmap_key_eq( (uint64_t *) entry->key, (uint64_t *) key, num_blocks )) )
-			return entry;
-
-		index = ((index + 1UL) & (map->capacity - 1U));
-	}
-}
-
-/**
- * @brief Calculates the hash code of data with a specified length.
- *
- * Calculates the hash code of data with a specified
- * length.
- *
- * @param[in] data Pointer to data to be hashed, NULL is NOT
- * an allowed here, so be careful. Data needs 8 byte alignment
- * and needs to be zero padded.
- * @param[in] len Number of bytes of hash data, must be larger
- * than 0 and is rounded up to the nearest 8 byte integer prior
- * calculating the hash code, so be careful.
- * @return Hash code of data.
- */
-static inline uint32_t iscsi_hashmap_key_hash_data(const uint8_t *data, const size_t len)
-{
-	const uint64_t *hash_data = (const uint64_t *) data;
-	size_t num_blocks         = ISCSI_ALIGN(len, ISCSI_HASHMAP_KEY_ALIGN) >> ISCSI_HASHMAP_KEY_ALIGN_SHIFT;
-	uint64_t hash             = ISCSI_HASHMAP_HASH_INITIAL;
-
-	do {
-		hash ^= *hash_data++;
-		hash *= ISCSI_HASHMAP_HASH_MUL;
-	} while ( --num_blocks > 0UL );
-
-	return (uint32_t) (hash ^ hash >> 32ULL);
-}
-
-/**
- * @brief Puts an old bucket into a resized hash map.
- *
- * Puts an old bucket into a resized hash map.
- *
- * @param[in] map Pointer to resized hash map, may NOT be NULL, so
- * be careful.
- * @param[in] old_entry The old bucket to be put into the resized
- * hash map.
- * @return New bucket where the bucket has been put into.
- */
-static iscsi_hashmap_bucket *iscsi_hashmap_resize_entry(iscsi_hashmap *map, const iscsi_hashmap_bucket *old_entry)
-{
-	uint32_t index = (old_entry->hash & (map->capacity - 1U));
-
-	for ( ;; ) {
-		iscsi_hashmap_bucket *entry = &map->buckets[index];
-
-		if ( entry->key == NULL ) {
-			entry->key       = old_entry->key;
-			entry->key_size  = old_entry->key_size;
-			entry->hash      = old_entry->hash;
-			entry->value     = old_entry->value;
-
-			return entry;
-		}
-
-		index = ((index + 1) & (map->capacity - 1U));
-	}
-}
-
-/**
- * @brief Resizes a hash map by doubling its bucket capacity.
- *
- * Resizes a hash map by doubling its bucket capacity The
- * old bucket list is freed after the
- * resize operation has been finished.
- *
- * @param[in] map Pointer to hash map to resize. This may NOT be
- * NULL, so be careful.
- * @retval -1 An error occured during resize.
- * @retval 0 Hash map has been resized successfully.
- */
-static int iscsi_hashmap_resize(iscsi_hashmap *map)
-{
-	const uint old_capacity           = map->capacity;
-	iscsi_hashmap_bucket *old_buckets = map->buckets;
-	iscsi_list old_list               = {map->list.head, map->list.tail, map->list.pred};
-
-	map->capacity <<= ISCSI_HASHMAP_RESIZE_SHIFT;
-
-	map->buckets = (iscsi_hashmap_bucket *) calloc( map->capacity, sizeof(struct iscsi_hashmap_bucket) );
-
-	if ( map->buckets == NULL ) {
-		map->capacity = old_capacity;
-		map->buckets  = old_buckets;
-
-		return -1;
-	}
-
-	map->cap_load = (uint) ((map->capacity * 3U) >> 2U); // 75% of capacity
-
-	iscsi_list_clear( &map->list );
-
-	iscsi_hashmap_bucket *current;
-	iscsi_hashmap_bucket *tmp;
-
-	iscsi_list_foreach_safe_node ( &old_list, current, tmp ) {
-		if ( current->key == NULL )
-			continue;
-
-		current = iscsi_hashmap_resize_entry( map, current );
-
-		iscsi_list_enqueue( &map->list, &current->node );
-	}
-
-	free( old_buckets );
-
-	return 0;
-}
-
-/**
- * @brief Assigns key / value pair to hash map at the tail of doubly linked list without making copies.
- *
- * Adds a key / value pair to a specified hash map
- * bucket list, if it doesn't exist already. The
- * buckets are resized automatically if required.\n
- * This function neither does make a copy of the key,
- * nor of the value. Keys should be allocated using
- * the function iscsi_hashmap_key_create or freed by
- * using iscsi_hashmap_key_destroy in order to
- * ensure the alignment and padding requirements.\n
- * The new pair will always added to the tail of the
- * linked list.
- *
- * @param[in] map Pointer to hash map where the key and
- * value pair should be added to, may NOT be NULL, so
- * be careful.
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] value Value of the key to add, NULL is
- * allowed.
- * @retval -1 Adding key / value pair would have required
- * hash map resizing which failed (probably due to
- * memory exhaustion).
- * @retval 0 Key / value pair was added successfully.
- */
-int iscsi_hashmap_put(iscsi_hashmap *map, uint8_t *key, const size_t key_size, uint8_t *value)
-{
-	if ( ((map->count + 1U) > map->cap_load) && (iscsi_hashmap_resize( map ) < 0) )
-		return -1;
-
-	const uint32_t hash         = iscsi_hashmap_key_hash_data( key, key_size );
-	iscsi_hashmap_bucket *entry = iscsi_hashmap_find_entry( map, key, key_size, hash );
-
-	if ( entry->key == NULL ) {
-		iscsi_list_enqueue( &map->list, &entry->node );
-
-		map->count++;
-
-		entry->key      = key;
-		entry->key_size = key_size;
-		entry->hash     = hash;
-	}
-
-	entry->value = value;
-
-	return 0;
-}
-
-/**
- * @brief Assigns key / value pair to hash map at the tail of doubly linked list without making copies.
- *
- * Adds a key / value pair if it doesn't exist
- * using the value of `*out_in_val`. If the pair
- * does exist, value will be set in `*out_in`,
- * meaning the value of the pair will be in
- * '*out_in` regardless of whether or not it it
- * existed in the first place.\n
- * The buckets are resized automatically if required.
- * This function neither does make a copy of the key,
- * nor of the value. Keys should be allocated using
- * the function iscsi_hashmap_key_create or freed by
- * using iscsi_hashmap_key_destroy in order to
- * ensure the alignment and padding requirements.
- *
- * @param[in] map Pointer to hash map where the key and
- * value pair should be added to, may NOT be NULL, so
- * be careful.
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in,out] out_in_value Value of the key to add,
- * NULL is allowed.
- * @retval -1 Adding key / value pair would have required
- * hash map resizing which failed (probably due to
- * memory exhaustion).
- * @retval 0 Key / value pair was added successfully.
- * @retval 1 Key already existed.
- */
-int iscsi_hashmap_get_put(iscsi_hashmap *map, uint8_t *key, const size_t key_size, uint8_t **out_in_value)
-{
-	if ( ((map->count + 1U) > map->cap_load) && (iscsi_hashmap_resize( map ) < 0) )
-		return -1;
-
-	const uint32_t hash         = iscsi_hashmap_key_hash_data( key, key_size );
-	iscsi_hashmap_bucket *entry = iscsi_hashmap_find_entry( map, key, key_size, hash );
-
-	if ( entry->key == NULL ) {
-		iscsi_list_enqueue( &map->list, &entry->node );
-
-		entry->key      = key;
-		entry->key_size = key_size;
-		entry->hash     = hash;
-		entry->value    = *out_in_value;
-
-		map->count++;
-
-		return 0;
-	}
-
-	*out_in_value = entry->value;
-
-	return 1;
-}
-
-/**
- * @brief Assigns key / value pair to hash map without making copies with callback function in case the key already exists.
- *
- * Adds a key / value pair to a specified hash map
- * bucket list. If the key already exists, it will
- * be overwritten and a callback function will be
- * invoked in order to allow, e.g. deallocation of
- * resources, if necessary. The buckets are resized
- * automatically if required. This function neither
- * does make a copy of the key, nor of the value.\n
- * Keys should be allocated using the function
- * iscsi_hashmap_key_create or freed by using
- * iscsi_hashmap_key_destroy in order to ensure the
- * alignment and padding requirements.
- *
- * @param[in] map Pointer to hash map where the key and
- * value pair should be added to, may NOT be NULL, so
- * be careful.
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] value Value of the key to add, NULL is
- * allowed.
- * @param[in] callback Callback function which allows,
- * for example, a dallocation of resources for the
- * overwritten key and value pair. The function is
- * invoked just before overwriting the old values.
- * This may NOT be NULL, so take caution.
- * @param[in,out] user_data Pointer to user specific data
- * passed to the callback function in case more
- * information is needed.
- * @return -1 in case adding key / value pair would
- * have required hash map resizing which failed
- * (probably due to memory exhaustion), 0 if the
- * Key / value pair was added successfully and
- * the callback function also returned 0, otherwise
- * the return value got by the callbuck function.
- */
-int iscsi_hashmap_put_free(iscsi_hashmap *map, uint8_t *key, const size_t key_size, uint8_t *value, iscsi_hashmap_callback callback, uint8_t *user_data)
-{
-	if ( ((map->count + 1U) > map->cap_load) && (iscsi_hashmap_resize( map ) < 0) )
-		return -1;
-
-	const uint32_t hash         = iscsi_hashmap_key_hash_data( key, key_size );
-	iscsi_hashmap_bucket *entry = iscsi_hashmap_find_entry( map, key, key_size, hash );
-
-	if ( entry->key == NULL ) {
-		iscsi_list_enqueue( &map->list, &entry->node );
-
-		entry->key      = key;
-		entry->key_size = key_size;
-		entry->hash     = hash;
-		entry->value    = value;
-
-		map->count++;
-
-		return 0;
-	}
-
-	int err = callback( entry->key, key_size, entry->value, user_data );
-
-	entry->key   = key;
-	entry->value = value;
-
-	return err;
-}
-
-/**
- * @brief Checks whether a specified key exists.
- *
- * Checks whether a specified key exists in a hash map.
- *
- * @param[in] map Pointer to the hash map to be searched
- * for the key to check for existence and may NOT be
- * NULL, so take caution.
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @retval true The key exists.
- * @retval false The key does not exist.
- */
-bool iscsi_hashmap_contains(iscsi_hashmap *map, const uint8_t *key, const size_t key_size)
-{
-	const uint32_t hash         = iscsi_hashmap_key_hash_data( key, key_size );
-	iscsi_hashmap_bucket *entry = iscsi_hashmap_find_entry( map, key, key_size, hash );
-
-	return (entry->key != NULL);
-}
-
-/**
- * @brief Retrieves the value of a specified key.
- *
- * Retrieves the value of a specified key from a hash
- * map. Since the hash map supports NULL values, it
- * is stored in an output variable.
- *
- * @param[in] map Pointer to the hash map to be searched
- * for the key of which the value should be
- * retrieved and may NOT be NULL, so take
- * caution.
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[out] out_value Pointer where the value of the found key
- * is stored, maybe NULL if either the key's value
- * is NULL or in case the key was not found. The
- * pointer to the value itself may NOT be NULL,
- * so be careful.
- * @retval 0 The key has been found and its value stored
- * in the 'out_value' parameter.
- * @retval -1 The key has not been found and NULL has been
- * stored in the 'out_value' parameter.
- */
-int iscsi_hashmap_get(iscsi_hashmap *map, const uint8_t *key, const size_t key_size, uint8_t **out_value)
-{
-	const uint32_t hash         = iscsi_hashmap_key_hash_data( key, key_size );
-	iscsi_hashmap_bucket *entry = iscsi_hashmap_find_entry( map, key, key_size, hash );
-
-	*out_value = entry->value;
-
-	return ((entry->key != NULL) ? 0 : -1);
-}
-
-/**
- * @brief Removes an element both from the doubly linked list and by setting key and value both to NULL.
- *
- * Removes an element from the bucket list of the
- * hash map. Removing sets the buckets key and
- * value to NULL.
- * If the specified key already has been removed,
- * this function will do nothing.
- *
- * @param[in] map Pointer to the hash map to remove from
- * and may NOT be NULL, so take caution.
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- */
-void iscsi_hashmap_remove(iscsi_hashmap *map, const uint8_t *key, const size_t key_size)
-{
-	const uint32_t hash         = iscsi_hashmap_key_hash_data( key, key_size );
-	iscsi_hashmap_bucket *entry = iscsi_hashmap_find_entry( map, key, key_size, hash );
-
-	if ( entry->key != NULL ) {
-		iscsi_list_remove( &entry->node );
-
-		map->count--;
-
-		entry->key   = NULL;
-		entry->value = NULL;
-	}
-}
-
-/**
- * @brief Removes an element both from the doubly linked list and by setting key and value both to NULL and but invokes a callback function before actual removal.
- *
- * Removes an element from the bucket list of the
- * hash map.\n
- * Removing sets the buckets key and
- * value to NULL. A callback function is invoked
- * if the key to be removed is found in the
- * bucket list and allows, e.g. to free any
- * resources associated with the key. If the key
- * is not found, this function will do nothing.
- *
- * @param[in] map Pointer to the hash map to remove from
- * and may NOT be NULL, so take caution.
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] callback Callback function which allows,
- * for example, a dallocation of resources for
- * the key and value pair to be removed. The
- * function is invoked just before marking the
- * key / value pair as removed. This may NOT
- * be NULL, so take caution.
- * @param[in,out] user_data Pointer to user specific data
- * passed to the callback function in case
- * more information is needed.
- */
-void iscsi_hashmap_remove_free(iscsi_hashmap *map, const uint8_t *key, const size_t key_size, iscsi_hashmap_callback callback, uint8_t *user_data)
-{
-	const uint32_t hash         = iscsi_hashmap_key_hash_data( key, key_size );
-	iscsi_hashmap_bucket *entry = iscsi_hashmap_find_entry( map, key, key_size, hash );
-
-	if ( entry->key != NULL ) {
-		iscsi_list_remove( &entry->node );
-
-		map->count--;
-
-		callback( entry->key, entry->key_size, entry->value, user_data );
-
-		entry->key   = NULL;
-		entry->value = NULL;
-	}
-}
-
-/**
- * @brief Retrieves the number of elements of the hash map.
- *
- * Returns the number of elements stored in the
- * specified hash map.
- *
- * @param[in] map Pointer to the hash map to count the
- * number of elements, may NOT be NULL, so
- * take caution.
- * @return Number of elements currently in use by the
- * hash map.
- */
-uint iscsi_hashmap_size(const iscsi_hashmap *map)
-{
-	return map->count;
-}
-
-/**
- * @brief Iterator with callback function invoked on each element.
- *
- * An iterator through the elements of a
- * specified hash map which uses a callback
- * function for each element, which also
- * can abort the iteration, if necessary.\n
- * It is safe to remove the current iterating
- * element in the callback function from the
- * hash map.
- *
- * @param[in] map Pointer to the hash map to iterate
- * through, may NOT be NULL, so take caution.
- * @param[in] callback Callback function to be
- * invoked for each element. If the return
- * value of the callback function is below
- * zero, the iteration will stop.
- * @param[in,out] user_data Pointer to user specific data
- * passed to the callback function in case more
- * information is needed.
- * @return The return code from the last invoked
- * callback function. A negative value indicates
- * an abortion of the iteration process.
- */
-int iscsi_hashmap_iterate(iscsi_hashmap *map, iscsi_hashmap_callback callback, uint8_t *user_data)
-{
-	iscsi_hashmap_bucket *current;
-	iscsi_hashmap_bucket *tmp;
-	int err = 0;
-
-	iscsi_list_foreach_safe_node ( &map->list, current, tmp ) {
-		if ( current->key == NULL )
-			continue;
-
-		err = callback( current->key, current->key_size, current->value, user_data );
-
-		if ( err < 0 )
-			break;
-	}
-
-	return err;
-}
-
-
-/// iSCSI global vector. MUST be initialized with iscsi_create before any iSCSI functions are used.
-iscsi_globals *iscsi_globvec = NULL;
-
-/// Read/write lock for iSCSI global vector. MUST be initialized with iscsi_create before any iSCSI functions are used.
-pthread_rwlock_t iscsi_globvec_rwlock;
-
-
-/// iSCSI connection negotation key and value pair lookup table.
-static const iscsi_key_value_pair_lut_entry iscsi_connection_key_value_pair_lut[] = {
-	{ ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_HEADER_DIGEST, (uint8_t *) "None", (uint8_t *) "CRC32C\0None\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_LIST, 0 },
-	{ ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DATA_DIGEST, (uint8_t *) "None", (uint8_t *) "CRC32C\0None\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_LIST, 0 },
-	{ ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_RECV_DS_LEN, (uint8_t *) "8192", (uint8_t *) "512\016777215\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_NUM_DECLARATIVE, ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_MULTI_NEGOTIATION | ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_OVERRIDE_DEFAULT },
-	{ ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_OF_MARKER, (uint8_t *) "No", (uint8_t *) "Yes\0No\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_BOOL_AND, 0 },
-	{ ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_IF_MARKER, (uint8_t *) "No", (uint8_t *) "Yes\0No\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_BOOL_AND, 0 },
-	{ ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_OF_MARK_INT, (uint8_t *) "1", (uint8_t *) "1\0""65535\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_NUM_MIN, 0 },
-	{ ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_IF_MARK_INT, (uint8_t *) "1", (uint8_t *) "1\0""65535\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_NUM_MIN, 0 },
-	{ ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD, (uint8_t *) "None", (uint8_t *) "CHAP\0None\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_LIST, 0 },
-	{ ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD_CHAP_CHAP_A, (uint8_t *) "5", (uint8_t *) "5\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_LIST, ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_CHAP_TYPE },
-	{ ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD_CHAP_CHAP_N, (uint8_t *) "", (uint8_t *) "\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_DECLARATIVE, ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_CHAP_TYPE },
-	{ ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD_CHAP_CHAP_R, (uint8_t *) "", (uint8_t *) "\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_DECLARATIVE, ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_CHAP_TYPE },
-	{ ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD_CHAP_CHAP_I, (uint8_t *) "", (uint8_t *) "\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_DECLARATIVE, ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_CHAP_TYPE },
-	{ ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD_CHAP_CHAP_C, (uint8_t *) "", (uint8_t *) "\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_DECLARATIVE, ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_CHAP_TYPE },
-	{ NULL, NULL, NULL, ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_INVALID, 0 }
-};
-
-/// iSCSI session negotation key and value pair lookup table.
-static const iscsi_key_value_pair_lut_entry iscsi_session_key_value_pair_lut[] = {
-	{ ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_CONNECTIONS, (uint8_t *) "1", (uint8_t *) "1\0""65535\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_NUM_MIN, ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_DISCOVERY_IGNORE },
-	{ ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_SEND_TARGETS, (uint8_t *) "", (uint8_t *) "\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_DECLARATIVE, ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_SPECIAL_HANDLING },
-	{ ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_NAME, (uint8_t *) "", (uint8_t *) "\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_DECLARATIVE, ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_TARGET_DECLARATIVE },
-	{ ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_INITIATOR_NAME, (uint8_t *) "", (uint8_t *) "\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_DECLARATIVE, 0 },
-	{ ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_ALIAS, (uint8_t *) "", (uint8_t *) "\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_DECLARATIVE, 0 },
-	{ ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_INITIATOR_ALIAS, (uint8_t *) "", (uint8_t *) "\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_DECLARATIVE, 0 },
-	{ ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_ADDRESS, (uint8_t *) "", (uint8_t *) "\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_DECLARATIVE, ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_TARGET_DECLARATIVE },
-	{ ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_PORTAL_GROUP_TAG, (uint8_t *) "1", (uint8_t *) "1\0""65535\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_NUM_DECLARATIVE, ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_TARGET_DECLARATIVE },
-	{ ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_INITIAL_R2T, (uint8_t *) "Yes", (uint8_t *) "Yes\0No\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_BOOL_OR, ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_DISCOVERY_IGNORE },
-	{ ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_IMMEDIATE_DATA, (uint8_t *) "Yes", (uint8_t *) "Yes\0No\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_BOOL_AND, ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_DISCOVERY_IGNORE },
-	{ ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_BURST_LEN, (uint8_t *) "262144", (uint8_t *) "512\0""16777215\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_NUM_MIN, ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_DISCOVERY_IGNORE | ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_USE_OTHER_MAX_VALUE },
-	{ ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_FIRST_BURST_LEN, (uint8_t *) "65536", (uint8_t *) "512\0""16777215\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_NUM_MIN, ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_DISCOVERY_IGNORE | ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_USE_PREVIOUS_VALUE },
-	{ ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DEFAULT_TIME_WAIT, (uint8_t *) "2", (uint8_t *) "0\0""3600\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_NUM_MAX, 0 },
-	{ ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DEFAULT_TIME_RETAIN, (uint8_t *) "20", (uint8_t *) "0\0""3600\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_NUM_MIN, 0 },
-	{ ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_OUTSTANDING_R2T, (uint8_t *) "1", (uint8_t *) "1\0""65536\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_NUM_MIN, ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_DISCOVERY_IGNORE },
-	{ ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DATA_PDU_IN_ORDER, (uint8_t *) "Yes", (uint8_t *) "Yes\0No\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_BOOL_OR, ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_DISCOVERY_IGNORE },
-	{ ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DATA_SEQ_IN_ORDER, (uint8_t *) "Yes", (uint8_t *) "Yes\0No\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_BOOL_OR, ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_DISCOVERY_IGNORE },
-	{ ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_ERR_RECOVERY_LEVEL, (uint8_t *) "0", (uint8_t *) "0\0""2\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_NUM_MIN, 0 },
-	{ ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_SESSION_TYPE, (uint8_t *) "Normal", (uint8_t *) "Normal\0Discovery\0", ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_DECLARATIVE, 0 },
-	{ NULL, NULL, NULL, ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_INVALID, 0 }
-};
-
-/**
- * @brief Initializes a global key and value pair with type and list / range informations for fast access.
- *
- * This function is used to initialize the iSCSI
- * global key and value pair list containing
- * the key types and allowed values.
- *
- * @param[in] key_value_pairs Pointer to key and value pair hash map
- * which should store the global key and value
- * informations, may NOT be NULL, so take caution.
- * @param[in] lut Lookup table to use for initialization.
- * NULL is not allowed here, so be careful.
- * @return 0 on success, a negative error code otherwise.
- */
-static int iscsi_global_key_value_pair_init(iscsi_hashmap *key_value_pairs, const iscsi_key_value_pair_lut_entry *lut)
-{
-	for ( uint i = 0U, j = 1U; lut[i].key != NULL; i++, j += j ) {
-		iscsi_key_value_pair *key_value_pair = (iscsi_key_value_pair *) malloc( sizeof(struct iscsi_key_value_pair) );
-
-		if ( key_value_pair == NULL ) {
-			logadd( LOG_ERROR, "iscsi_global_key_value_pair_init: Out of memory allocating key value pair" );
-
-			return -1;
-		}
-
-		const uint key_len = (uint) (strlen( (char *) lut[i].key ) + 1U);
-
-		key_value_pair->value       = lut[i].value;
-		key_value_pair->list_range  = lut[i].list_range;
-		key_value_pair->type        = lut[i].type;
-		key_value_pair->flags       = lut[i].flags;
-		key_value_pair->state_mask  = j;
-
-		const int rc = iscsi_hashmap_put( key_value_pairs, (uint8_t *) lut[i].key, key_len, (uint8_t *) key_value_pair );
-
-		if ( rc < 0 ) {
-			free( key_value_pair );
-
-			return rc;
-		}
-	}
-
-	return 0;
-}
-
-/**
- * @brief Allocates and initializes the iSCSI global vector structure.
- *
- * This function MUST be called before any iSCSI
- * related functions are used.\n
- * It is safe to call this function if the iSCSI
- * global vector already has been initialized
- * in which case this function does nothing.
- *
- * @return 0 if the iSCSI global vector has been initialized
- * successfully and is ready to use, a negative
- * error code otherwise (memory exhausted).
- */
-int iscsi_create()
+static void iscsi_copy_kvp_int(const char *name, int *dest, const char *src)
 {
-	pthread_rwlock_wrlock( &iscsi_globvec_rwlock );
-
-	if ( iscsi_globvec == NULL ) {
-		iscsi_globals *globvec = (iscsi_globals *) malloc( sizeof(struct iscsi_globals) );
-
-		if ( globvec == NULL ) {
-			logadd( LOG_ERROR, "iscsi_create: Out of memory while allocating iSCSI global vector" );
-
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return -1;
-		}
-
-		globvec->devices = iscsi_hashmap_create( _maxImages );
-
-		if ( globvec->devices == NULL ) {
-			logadd( LOG_ERROR, "iscsi_create: Out of memory while allocating iSCSI global vector devices hash map" );
-
-			free( globvec );
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return -1;
-		}
-
-		if ( pthread_rwlock_init( &globvec->devices_rwlock, NULL ) != 0 ) {
-			logadd( LOG_ERROR, "iscsi_create: Out of memory while initializing read/write lock for iSCSI global vector devices hash map" );
-
-			iscsi_hashmap_destroy( globvec->devices );
-			free( globvec );
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return -1;
-		}
-
-		globvec->portal_groups = iscsi_hashmap_create( 1U );
-
-		if ( globvec->portal_groups == NULL ) {
-			logadd( LOG_ERROR, "iscsi_create: Out of memory while allocating iSCSI global vector portal groups hash map" );
-
-			pthread_rwlock_destroy( &globvec->devices_rwlock );
-			iscsi_hashmap_destroy( globvec->devices );
-			free( globvec );
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return -1;
-		}
-
-		if ( pthread_rwlock_init( &globvec->portal_groups_rwlock, NULL ) != 0 ) {
-			logadd( LOG_ERROR, "iscsi_create: Out of memory while initializing read/write lock for iSCSI global vector portal groups hash map" );
-
-			iscsi_hashmap_destroy( globvec->portal_groups );
-			pthread_rwlock_destroy( &globvec->devices_rwlock );
-			iscsi_hashmap_destroy( globvec->devices );
-			free( globvec );
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return -1;
-		}
-
-		globvec->target_nodes = iscsi_hashmap_create( _maxImages );
-
-		if ( globvec->target_nodes == NULL ) {
-			logadd( LOG_ERROR, "iscsi_create: Out of memory while allocating iSCSI global vector target nodes hash map" );
-
-			pthread_rwlock_destroy( &globvec->portal_groups_rwlock );
-			iscsi_hashmap_destroy( globvec->portal_groups );
-			pthread_rwlock_destroy( &globvec->devices_rwlock );
-			iscsi_hashmap_destroy( globvec->devices );
-			free( globvec );
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return -1;
-		}
-
-		if ( pthread_rwlock_init( &globvec->target_nodes_rwlock, NULL ) != 0 ) {
-			logadd( LOG_ERROR, "iscsi_create: Out of memory while initializing read/write lock for iSCSI global vector target nodes hash map" );
-
-			iscsi_hashmap_destroy( globvec->target_nodes );
-			pthread_rwlock_destroy( &globvec->portal_groups_rwlock );
-			iscsi_hashmap_destroy( globvec->portal_groups );
-			pthread_rwlock_destroy( &globvec->devices_rwlock );
-			iscsi_hashmap_destroy( globvec->devices );
-			free( globvec );
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return -1;
-		}
-
-		globvec->sessions = iscsi_hashmap_create( _maxClients );
-
-		if ( globvec->sessions == NULL ) {
-			logadd( LOG_ERROR, "iscsi_create: Out of memory while allocating iSCSI global vector sessions hash map" );
-
-			pthread_rwlock_destroy( &globvec->target_nodes_rwlock );
-			iscsi_hashmap_destroy( globvec->target_nodes );
-			pthread_rwlock_destroy( &globvec->portal_groups_rwlock );
-			iscsi_hashmap_destroy( globvec->portal_groups );
-			pthread_rwlock_destroy( &globvec->devices_rwlock );
-			iscsi_hashmap_destroy( globvec->devices );
-			free( globvec );
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return -1;
-		}
-
-		if ( pthread_rwlock_init( &globvec->sessions_rwlock, NULL ) != 0 ) {
-			logadd( LOG_ERROR, "iscsi_create: Out of memory while initializing read/write lock for iSCSI global vector sessions hash map map" );
-
-			iscsi_hashmap_destroy( globvec->sessions );
-			pthread_rwlock_destroy( &globvec->target_nodes_rwlock );
-			iscsi_hashmap_destroy( globvec->target_nodes );
-			pthread_rwlock_destroy( &globvec->portal_groups_rwlock );
-			iscsi_hashmap_destroy( globvec->portal_groups );
-			pthread_rwlock_destroy( &globvec->devices_rwlock );
-			iscsi_hashmap_destroy( globvec->devices );
-			free( globvec );
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return -1;
-		}
-
-		globvec->session_key_value_pairs = iscsi_hashmap_create( ((sizeof(iscsi_session_key_value_pair_lut) / sizeof(struct iscsi_key_value_pair_lut_entry)) - 1) );
-
-		if ( globvec->session_key_value_pairs == NULL ) {
-			logadd( LOG_ERROR, "iscsi_create: Out of memory while allocating iSCSI global vector session key and value pairs hash map" );
-
-			pthread_rwlock_destroy( &globvec->sessions_rwlock );
-			iscsi_hashmap_destroy( globvec->sessions );
-			pthread_rwlock_destroy( &globvec->target_nodes_rwlock );
-			iscsi_hashmap_destroy( globvec->target_nodes );
-			pthread_rwlock_destroy( &globvec->portal_groups_rwlock );
-			iscsi_hashmap_destroy( globvec->portal_groups );
-			pthread_rwlock_destroy( &globvec->devices_rwlock );
-			iscsi_hashmap_destroy( globvec->devices );
-			free( globvec );
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return -1;
-		}
-
-		int rc = iscsi_global_key_value_pair_init( globvec->session_key_value_pairs, &iscsi_session_key_value_pair_lut[0] );
-
-		if ( rc < 0 ) {
-			logadd( LOG_ERROR, "iscsi_create: Out of memory while initializing iSCSI global vector session key and value pairs hash map" );
-
-			iscsi_hashmap_iterate( globvec->session_key_value_pairs, iscsi_hashmap_destroy_value_callback, NULL );
-			iscsi_hashmap_destroy( globvec->session_key_value_pairs );
-			pthread_rwlock_destroy( &globvec->sessions_rwlock );
-			iscsi_hashmap_destroy( globvec->sessions );
-			pthread_rwlock_destroy( &globvec->target_nodes_rwlock );
-			iscsi_hashmap_destroy( globvec->target_nodes );
-			pthread_rwlock_destroy( &globvec->portal_groups_rwlock );
-			iscsi_hashmap_destroy( globvec->portal_groups );
-			pthread_rwlock_destroy( &globvec->devices_rwlock );
-			iscsi_hashmap_destroy( globvec->devices );
-			free( globvec );
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return -1;
-		}
-
-		globvec->connection_key_value_pairs = iscsi_hashmap_create( ((sizeof(iscsi_connection_key_value_pair_lut) / sizeof(struct iscsi_key_value_pair_lut_entry)) - 1) );
-
-		if ( globvec->connection_key_value_pairs == NULL ) {
-			logadd( LOG_ERROR, "iscsi_create: Out of memory while allocating iSCSI global vector connection key and value pairs hash map" );
-
-			iscsi_hashmap_iterate( globvec->session_key_value_pairs, iscsi_hashmap_destroy_value_callback, NULL );
-			iscsi_hashmap_destroy( globvec->session_key_value_pairs );
-			pthread_rwlock_destroy( &globvec->sessions_rwlock );
-			iscsi_hashmap_destroy( globvec->sessions );
-			pthread_rwlock_destroy( &globvec->target_nodes_rwlock );
-			iscsi_hashmap_destroy( globvec->target_nodes );
-			pthread_rwlock_destroy( &globvec->portal_groups_rwlock );
-			iscsi_hashmap_destroy( globvec->portal_groups );
-			pthread_rwlock_destroy( &globvec->devices_rwlock );
-			iscsi_hashmap_destroy( globvec->devices );
-			free( globvec );
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return -1;
-		}
-
-		rc = iscsi_global_key_value_pair_init( globvec->connection_key_value_pairs, &iscsi_connection_key_value_pair_lut[0] );
-
-		if ( rc < 0 ) {
-			logadd( LOG_ERROR, "iscsi_create: Out of memory while initializing iSCSI global vector connection key and value pairs hash map" );
-
-			iscsi_hashmap_iterate( globvec->connection_key_value_pairs, iscsi_hashmap_destroy_value_callback, NULL );
-			iscsi_hashmap_destroy( globvec->connection_key_value_pairs );
-			iscsi_hashmap_iterate( globvec->session_key_value_pairs, iscsi_hashmap_destroy_value_callback, NULL );
-			iscsi_hashmap_destroy( globvec->session_key_value_pairs );
-			pthread_rwlock_destroy( &globvec->sessions_rwlock );
-			iscsi_hashmap_destroy( globvec->sessions );
-			pthread_rwlock_destroy( &globvec->target_nodes_rwlock );
-			iscsi_hashmap_destroy( globvec->target_nodes );
-			pthread_rwlock_destroy( &globvec->portal_groups_rwlock );
-			iscsi_hashmap_destroy( globvec->portal_groups );
-			pthread_rwlock_destroy( &globvec->devices_rwlock );
-			iscsi_hashmap_destroy( globvec->devices );
-			free( globvec );
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return -1;
-		}
-
-		globvec->scsi_device_config = iscsi_hashmap_create( 0U );
-
-		if ( globvec->scsi_device_config == NULL ) {
-			logadd( LOG_ERROR, "iscsi_create: Out of memory while allocating iSCSI global vector SCSI device configuration" );
-
-			iscsi_hashmap_iterate( globvec->connection_key_value_pairs, iscsi_hashmap_destroy_value_callback, NULL );
-			iscsi_hashmap_destroy( globvec->connection_key_value_pairs );
-			iscsi_hashmap_iterate( globvec->session_key_value_pairs, iscsi_hashmap_destroy_value_callback, NULL );
-			iscsi_hashmap_destroy( globvec->session_key_value_pairs );
-			pthread_rwlock_destroy( &globvec->sessions_rwlock );
-			iscsi_hashmap_destroy( globvec->sessions );
-			pthread_rwlock_destroy( &globvec->target_nodes_rwlock );
-			iscsi_hashmap_destroy( globvec->target_nodes );
-			pthread_rwlock_destroy( &globvec->portal_groups_rwlock );
-			iscsi_hashmap_destroy( globvec->portal_groups );
-			pthread_rwlock_destroy( &globvec->devices_rwlock );
-			iscsi_hashmap_destroy( globvec->devices );
-			free( globvec );
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return -1;
-		}
-
-		if ( pthread_mutex_init( &globvec->scsi_device_config_mutex, NULL ) != 0 ) {
-			logadd( LOG_ERROR, "iscsi_create: Out of memory while initializing mutex for iSCSI global vector SCSI device configuration" );
-
-			iscsi_hashmap_destroy( globvec->scsi_device_config );
-			iscsi_hashmap_iterate( globvec->connection_key_value_pairs, iscsi_hashmap_key_destroy_value_callback, NULL );
-			iscsi_hashmap_destroy( globvec->connection_key_value_pairs );
-			iscsi_hashmap_iterate( globvec->session_key_value_pairs, iscsi_hashmap_destroy_value_callback, NULL );
-			iscsi_hashmap_destroy( globvec->session_key_value_pairs );
-			pthread_rwlock_destroy( &globvec->sessions_rwlock );
-			iscsi_hashmap_destroy( globvec->sessions );
-			pthread_rwlock_destroy( &globvec->target_nodes_rwlock );
-			iscsi_hashmap_destroy( globvec->target_nodes );
-			pthread_rwlock_destroy( &globvec->portal_groups_rwlock );
-			iscsi_hashmap_destroy( globvec->portal_groups );
-			pthread_rwlock_destroy( &globvec->devices_rwlock );
-			iscsi_hashmap_destroy( globvec->devices );
-			free( globvec );
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return -1;
-		}
-
-		globvec->flags                          = (ISCSI_GLOBALS_FLAGS_INIT_R2T | ISCSI_GLOBALS_FLAGS_IMMEDIATE_DATA | ISCSI_GLOBALS_FLAGS_DATA_PDU_IN_ORDER | ISCSI_GLOBALS_FLAGS_DATA_SEQ_IN_ORDER | ISCSI_GLOBALS_FLAGS_SCSI_IO_REMOVABLE | ISCSI_GLOBALS_FLAGS_SCSI_IO_WRITE_PROTECT);
-		globvec->target_name_check              = ISCSI_GLOBALS_TARGET_NAME_CHECK_FULL;
-		globvec->max_sessions                   = 0U;
-		globvec->header_digest                  = 0;
-		globvec->data_digest                    = 0;
-		globvec->scsi_device_type               = ISCSI_SCSI_BASIC_INQUIRY_DATA_PERIPHERAL_TYPE_DIRECT;
-		globvec->max_recv_ds_len                = ISCSI_DEFAULT_RECV_DS_LEN;
-		globvec->max_session_conns              = ISCSI_GLOBALS_DEFAULT_MAX_CONNECTIONS;
-		globvec->max_outstanding_r2t            = ISCSI_GLOBALS_DEFAULT_MAX_OUTSTANDING_R2T;
-		globvec->default_time_to_wait           = ISCSI_GLOBALS_DEFAULT_TIME_TO_WAIT;
-		globvec->default_time_to_retain         = ISCSI_GLOBALS_DEFAULT_TIME_TO_RETAIN;
-		globvec->first_burst_len                = ISCSI_GLOBALS_DEFAULT_FIRST_BURST_LEN;
-		globvec->max_burst_len                  = ISCSI_GLOBALS_DEFAULT_MAX_BURST_LEN;
-		globvec->err_recovery_level             = ISCSI_GLOBALS_DEFAULT_ERR_RECOVERY_LEVEL;
-		globvec->chap_group                     = 0L;
-		globvec->scsi_physical_block_size       = ISCSI_SCSI_EMU_PHYSICAL_BLOCK_SIZE;
-		globvec->scsi_physical_block_size_shift = iscsi_get_log2_of_pow2( globvec->scsi_physical_block_size );
-		globvec->scsi_logical_block_size        = ISCSI_SCSI_EMU_BLOCK_SIZE;
-		globvec->scsi_logical_block_size_shift  = iscsi_get_log2_of_pow2( globvec->scsi_logical_block_size );
-
-		iscsi_config_load( globvec );
-
-		iscsi_globvec = globvec;
-	}
-
-	pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-	return 0;
-}
-
-/**
- * @brief Deallocates all resources acquired by iscsi_create.
- *
- * This function MUST be called before program termination
- * for ensuring proper clean up.\n
- * After this function returns, calling any iSCSI related
- * function except iscsi_create is strictly forbidden.\n
- * It is safe to call this function if the iSCSI global
- * vector already has been destroyed in which case this
- * function does nothing.
- */
-void iscsi_destroy()
-{
-	pthread_rwlock_wrlock( &iscsi_globvec_rwlock );
-
-	iscsi_globals *globvec = iscsi_globvec;
-
-	if ( globvec != NULL ) {
-		iscsi_globvec = NULL;
-
-		pthread_mutex_destroy( &globvec->scsi_device_config_mutex );
-		iscsi_hashmap_iterate( globvec->scsi_device_config, iscsi_hashmap_key_destroy_value_callback, NULL );
-		iscsi_hashmap_destroy( globvec->scsi_device_config );
-		globvec->scsi_device_config = NULL;
-
-		iscsi_hashmap_iterate( globvec->connection_key_value_pairs, iscsi_hashmap_destroy_value_callback, NULL );
-		iscsi_hashmap_destroy( globvec->connection_key_value_pairs );
-		globvec->connection_key_value_pairs = NULL;
-
-		iscsi_hashmap_iterate( globvec->session_key_value_pairs, iscsi_hashmap_destroy_value_callback, NULL );
-		iscsi_hashmap_destroy( globvec->session_key_value_pairs );
-		globvec->session_key_value_pairs = NULL;
-
-		pthread_rwlock_destroy( &globvec->sessions_rwlock );
-		iscsi_hashmap_iterate( globvec->sessions, iscsi_session_destroy_callback, NULL );
-		iscsi_hashmap_destroy( globvec->sessions );
-		globvec->sessions = NULL;
-
-		pthread_rwlock_destroy( &globvec->target_nodes_rwlock );
-		iscsi_hashmap_iterate( globvec->target_nodes, iscsi_target_node_destroy_callback, NULL );
-		iscsi_hashmap_destroy( globvec->target_nodes );
-		globvec->target_nodes = NULL;
-
-		pthread_rwlock_destroy( &globvec->portal_groups_rwlock );
-		iscsi_hashmap_iterate( globvec->portal_groups, iscsi_portal_group_destroy_callback, NULL );
-		iscsi_hashmap_destroy( globvec->portal_groups );
-		globvec->portal_groups = NULL;
-
-		pthread_rwlock_destroy( &globvec->devices_rwlock );
-		iscsi_hashmap_iterate( globvec->devices, iscsi_device_destroy_callback, NULL );
-		iscsi_hashmap_destroy( globvec->devices );
-		globvec->devices = NULL;
-
-		free( globvec );
-	}
-
-	pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-}
-
-/**
- * @brief Parses an INI configuration value and returns an integer representation of string with special boolean and suffixes handling.
- *
- * This function also handles boolean values 'true',
- * 'yes', 'on', 'enabled' and 'activated', returning 1
- * for them, as well as 'false', 'no', 'off', 'disabled'
- * and 'deactivated' having a return value of 0.\n
- * Also the suffixes 'm' for minutes, 'h' for hours and
- * 'd' for days are understood as time units.\n
- * SI units 'K', 'M', 'G', 'T', 'P' and 'E' are
- * understood as well.\n
- * If a 'b' or 'B' follows, 1000 will be used as a
- * multiplier instead of 1024.\n
- * Parsing will be internally done in 64 bits and the
- * final result is clamped between -2147483647 and
- * 2147483647.
- *
- * @param[in] value Pointer to string for parsing. May
- * NOT be NULL, so be careful.
- * @return Parsed integer value or -2147483648
- * in case of an error.
- */
-static int32_t iscsi_config_parse_int(const uint8_t *value)
-{
-	if ( *value == '\0' )
-		return -2147483648L;
-
-	if ( (strcasecmp( (char *) value, "true" ) == 0) || (strcasecmp( (char *) value, "yes" ) == 0) || (strcasecmp( (char *) value, "on" ) == 0) || (strcasecmp( (char *) value, "enabled" ) == 0) || (strcasecmp( (char *) value, "activated" ) == 0) )
-		return 1L;
-	else if ( (strcasecmp( (char *) value, "false" ) == 0) || (strcasecmp( (char *) value, "no" ) == 0) || (strcasecmp( (char *) value, "off" ) == 0) || (strcasecmp( (char *) value, "disabled" ) == 0) || (strcasecmp( (char *) value, "deactivated" ) == 0) )
-		return 0L;
-
-	uint8_t *val_end;
-	int64_t rc = (int64_t) strtoll( (char *) value, (char **) &val_end, 10 );
-
-	if ( value == val_end )
-		return -2147483648L;
-
-	while ( (*val_end == '\t') || (*val_end == ' ') ) {
-		val_end++;
-	}
-
-	switch ( *val_end ) {
-		case '\0' : {
-			break;
-		}
-		case 'm' : {
-			rc *= 60LL;
-			val_end++;
-
-			break;
-		}
-		case 'h' : {
-			rc *= 3600LL;
-			val_end++;
+	long long res = 0;
+	const char *end = NULL;
 
-			break;
-		}
-		case 'd' : {
-			rc *= 86400LL;
-			val_end++;
-
-			break;
-		}
-		default : {
-			const uint8_t c = (*val_end++ | ('a' - 'A'));
-			const bool ten  = ((*val_end | ('a' - 'A')) == 'b');
-
-			switch ( c ) {
-				case 'k' : {
-					rc = (ten ? (rc * 1000LL) : (rc << 10LL));
-
-					break;
-				}
-				case 'm' : {
-					rc = (ten ? (rc * 1000000LL) : (rc << 20LL));
-
-					break;
-				}
-				case 'g' : {
-					rc = (ten ? (rc * 1000000000LL) : (rc << 30LL));
-
-					break;
-				}
-				case 't' : {
-					rc = (ten ? (rc * 1000000000000LL) : (rc << 40LL));
-
-					break;
-				}
-				case 'p' : {
-					rc = (ten ? (rc * 1000000000000000LL) : (rc << 50LL));
-
-					break;
-				}
-				case 'e' : {
-					rc = (ten ? (rc * 1000000000000000000LL) : (rc << 60LL));
-
-					break;
-				}
-				default : {
-					return -2147483648L;
-
-					break;
-				}
-			}
-
-			if ( ten )
-				val_end++;
-
-			break;
-		}
+	if ( *dest != -1 ) {
+		logadd( LOG_DEBUG1, "Received duplicate entry for key '%s', ignoring (new: %s, old: %d)", name, src, *dest );
+		return;
 	}
 
-	if ( *val_end != '\0' )
-		return -2147483648L;
-
-	if ( rc < -2147483647LL )
-		rc = -2147483647LL;
-	else if ( rc > 2147483647LL )
-		rc = 2147483647LL;
-
-	return (int32_t) rc;
-}
-
-/**
- * @brief Callback function from DNBD3 INI parser invoked for handling a specific key=value pair in a specified INI section.
- *
- * This function checks whether the INI
- * section belongs to the iSCSI server
- * configuration part.\n
- * Currently, the sections 'iscsi' and
- * 'scsi' for the SCSI emulation are
- * processed.
- *
- * @param[in] user_data Pointer to iSCSI global vector where
- * to store the configuration data. May
- * NOT be NULL, so be careful.
- * @param[in] section Pointer to currently processing
- * INI section. NULL is NOT allowed here,
- * take caution.
- * @param[in] key Pointer to currently processing INI
- * key. May NOT be NULL, so be careful.
- * @param[in] value Pointer to currently processing INI
- * value. NULL is prohibited, so take
- * caution.
- * @retval 1 INI parsing was successful.
- * @retval 0 An error occured during INI parsing.
- */
-static int iscsi_config_load_from_ini(void *user_data, const char *section, const char *key, const char *value)
-{
-	iscsi_globals *globvec = (iscsi_globals *) user_data;
-
-	if ( strcasecmp( section, ISCSI_GLOBALS_SECTION_ISCSI ) == 0 ) {
-		const int32_t num_value = iscsi_config_parse_int( (uint8_t *) value );
-
-		if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_ISCSI_KEY_TARGET_NAME_CHECK ) == 0 ) {
-			if ( strcasecmp( value, "None" ) == 0 )
-				globvec->target_name_check = ISCSI_GLOBALS_TARGET_NAME_CHECK_NONE;
-			else if ( strcasecmp( value, "Relaxed" ) == 0 )
-				globvec->target_name_check = ISCSI_GLOBALS_TARGET_NAME_CHECK_RELAXED;
-			else
-				globvec->target_name_check = ISCSI_GLOBALS_TARGET_NAME_CHECK_FULL;
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_ISCSI_KEY_MAX_SESSIONS ) == 0 ) {
-			globvec->max_sessions = (uint) num_value;
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_HEADER_DIGEST ) == 0 ) {
-			globvec->header_digest = ((strcasecmp( value, "CRC32C" ) == 0) ? ISCSI_DIGEST_SIZE : 0);
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DATA_DIGEST ) == 0 ) {
-			globvec->data_digest = ((strcasecmp( value, "CRC32C" ) == 0) ? ISCSI_DIGEST_SIZE : 0);
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_RECV_DS_LEN ) == 0 ) {
-			if ( (num_value >= 512L) && (num_value <= (int32_t) ISCSI_MAX_DS_SIZE) )
-				globvec->max_recv_ds_len = num_value;
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_ISCSI_MAX_CONNECTIONS_PER_SESSIONS ) == 0 ) {
-			if ( (num_value > 0L) && (num_value <= 65535L) )
-				globvec->max_session_conns = num_value;
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_OUTSTANDING_R2T ) == 0 ) {
-			if ( (num_value > 0L) && (num_value <= 65536L) )
-				globvec->max_outstanding_r2t = num_value;
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DEFAULT_TIME_WAIT ) == 0 ) {
-			if ( (uint32_t) num_value <= 3600UL )
-				globvec->default_time_to_wait = num_value;
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DEFAULT_TIME_RETAIN ) == 0 ) {
-			if ( (uint32_t) num_value <= 3600UL )
-				globvec->default_time_to_retain = num_value;
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_FIRST_BURST_LEN ) == 0 ) {
-			if ( (num_value >= 512L) && (num_value <= (int32_t) ISCSI_MAX_DS_SIZE) )
-				globvec->first_burst_len = num_value;
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_BURST_LEN ) == 0 ) {
-			if ( (num_value >= 512L) && (num_value <= (int32_t) ISCSI_MAX_DS_SIZE) )
-				globvec->max_burst_len = num_value;
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_INITIAL_R2T ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					globvec->flags |= ISCSI_GLOBALS_FLAGS_INIT_R2T;
-				else
-					globvec->flags &= ~ISCSI_GLOBALS_FLAGS_INIT_R2T;
-			}
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_IMMEDIATE_DATA ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					globvec->flags |= ISCSI_GLOBALS_FLAGS_IMMEDIATE_DATA;
-				else
-					globvec->flags &= ~ISCSI_GLOBALS_FLAGS_IMMEDIATE_DATA;
-			}
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DATA_PDU_IN_ORDER ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					globvec->flags |= ISCSI_GLOBALS_FLAGS_DATA_PDU_IN_ORDER;
-				else
-					globvec->flags &= ~ISCSI_GLOBALS_FLAGS_DATA_PDU_IN_ORDER;
-			}
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DATA_SEQ_IN_ORDER ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					globvec->flags |= ISCSI_GLOBALS_FLAGS_DATA_SEQ_IN_ORDER;
-				else
-					globvec->flags &= ~ISCSI_GLOBALS_FLAGS_DATA_SEQ_IN_ORDER;
-			}
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_ERR_RECOVERY_LEVEL ) == 0 ) {
-			if ( (uint32_t) num_value <= 2UL )
-				globvec->err_recovery_level = num_value;
-		}
-	} else if ( strcasecmp( section, ISCSI_GLOBALS_SECTION_SCSI ) == 0 ) {
-		int32_t num_value = iscsi_config_parse_int( (uint8_t *) value );
-
-		if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_SCSI_KEY_DEVICE_TYPE ) == 0 ) {
-			if ( strcasecmp( value, "Sequential" ) == 0 )
-				globvec->scsi_device_type = ISCSI_SCSI_BASIC_INQUIRY_DATA_PERIPHERAL_TYPE_SEQ;
-			else if ( strcasecmp( value, "WriteOnce" ) == 0 )
-				globvec->scsi_device_type = ISCSI_SCSI_BASIC_INQUIRY_DATA_PERIPHERAL_TYPE_WORM;
-			else if ( strcasecmp( value, "ReadOnlyDirect" ) == 0 )
-				globvec->scsi_device_type = ISCSI_SCSI_BASIC_INQUIRY_DATA_PERIPHERAL_TYPE_RO_DIRECT;
-			else if ( strcasecmp( value, "OpticalMemory" ) == 0 )
-				globvec->scsi_device_type = ISCSI_SCSI_BASIC_INQUIRY_DATA_PERIPHERAL_TYPE_OPTICAL;
-			else if ( strcasecmp( value, "MediaChanger" ) == 0 )
-				globvec->scsi_device_type = ISCSI_SCSI_BASIC_INQUIRY_DATA_PERIPHERAL_TYPE_CHANGER;
-			else
-				globvec->scsi_device_type = ISCSI_SCSI_BASIC_INQUIRY_DATA_PERIPHERAL_TYPE_DIRECT;
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_SCSI_KEY_PHYSICAL_BLOCK_SIZE ) == 0 ) {
-			num_value = iscsi_align_pow2_ceil( num_value );
-
-			if ( (num_value >= 256L) && (num_value <= 32768L) ) {
-				globvec->scsi_physical_block_size       = num_value;
-				globvec->scsi_physical_block_size_shift = iscsi_get_log2_of_pow2( num_value );
-			}
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_SCSI_KEY_LOGICAL_BLOCK_SIZE ) == 0 ) {
-			num_value = iscsi_align_pow2_ceil( num_value );
-
-			if ( (num_value >= 256L) && (num_value <= 32768L) ) {
-				globvec->scsi_logical_block_size       = num_value;
-				globvec->scsi_logical_block_size_shift = iscsi_get_log2_of_pow2( num_value );
-			}
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_SCSI_KEY_REMOVABLE ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					globvec->flags |= ISCSI_GLOBALS_FLAGS_SCSI_IO_REMOVABLE;
-				else
-					globvec->flags &= ~ISCSI_GLOBALS_FLAGS_SCSI_IO_REMOVABLE;
-			}
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_SCSI_KEY_UNMAP ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					globvec->flags |= ISCSI_GLOBALS_FLAGS_SCSI_IO_UNMAP;
-				else
-					globvec->flags &= ~ISCSI_GLOBALS_FLAGS_SCSI_IO_UNMAP;
-			}
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_SCSI_KEY_NO_ROTATION ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					globvec->flags |= ISCSI_GLOBALS_FLAGS_SCSI_IO_NO_ROTATION;
-				else
-					globvec->flags &= ~ISCSI_GLOBALS_FLAGS_SCSI_IO_NO_ROTATION;
-			}
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_SCSI_KEY_PHYSICAL_READ_ONLY ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					globvec->flags |= ISCSI_GLOBALS_FLAGS_SCSI_IO_PHYSICAL_READ_ONLY;
-				else
-					globvec->flags &= ~ISCSI_GLOBALS_FLAGS_SCSI_IO_PHYSICAL_READ_ONLY;
-			}
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_SCSI_KEY_WRITE_PROTECT ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					globvec->flags |= ISCSI_GLOBALS_FLAGS_SCSI_IO_WRITE_PROTECT;
-				else
-					globvec->flags &= ~ISCSI_GLOBALS_FLAGS_SCSI_IO_WRITE_PROTECT;
-			}
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_SCSI_KEY_WRITE_CACHE ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					globvec->flags |= ISCSI_GLOBALS_FLAGS_SCSI_IO_WRITE_CACHE;
-				else
-					globvec->flags &= ~ISCSI_GLOBALS_FLAGS_SCSI_IO_WRITE_CACHE;
-			}
-		}
-	} else if ( strncasecmp( section, ISCSI_GLOBALS_SECTION_SCSI_DEVICE_PREFIX, ISCSI_STRLEN(ISCSI_GLOBALS_SECTION_SCSI_DEVICE_PREFIX) ) == 0 ) {
-		uint8_t *pattern   = (((uint8_t *) section) + ISCSI_STRLEN(ISCSI_GLOBALS_SECTION_SCSI_DEVICE_PREFIX));
-		const uint key_len = (uint) (strlen( (char *) pattern ) + 1U);
-
-		if ( key_len == 0U )
-			return 0;
-
-		uint8_t *hash_key  = iscsi_hashmap_key_create( pattern, key_len );
-
-		if ( hash_key == NULL ) {
-			logadd( LOG_ERROR, "iscsi_config_load_from_ini: Out of memory allocating memory for iSCSI SCSI device INI configuration section key" );
-
-			return 0;
-		}
-
-		iscsi_scsi_device_config *scsi_device_config = NULL;
-		int rc                                       = iscsi_hashmap_get( globvec->scsi_device_config, hash_key, key_len, (uint8_t **) &scsi_device_config );
-
-		if ( scsi_device_config == NULL ) {
-			scsi_device_config = (iscsi_scsi_device_config *) malloc( sizeof(struct iscsi_scsi_device_config) );
-
-			if ( scsi_device_config == NULL ) {
-				logadd( LOG_ERROR, "iscsi_config_load_from_ini: Out of memory allocating memory for iSCSI SCSI device configuration" );
-
-				iscsi_hashmap_key_destroy( hash_key );
-
-				return 0;
-			}
-
-			scsi_device_config->flags = 0;
-
-			if ( (globvec->flags & ISCSI_GLOBALS_FLAGS_INIT_R2T) != 0 )
-				scsi_device_config->flags |= ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_INIT_R2T;
-
-			if ( (globvec->flags & ISCSI_GLOBALS_FLAGS_IMMEDIATE_DATA) != 0 )
-				scsi_device_config->flags |= ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_IMMEDIATE_DATA;
-
-			if ( (globvec->flags & ISCSI_GLOBALS_FLAGS_DATA_PDU_IN_ORDER) != 0 )
-				scsi_device_config->flags |= ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_DATA_PDU_IN_ORDER;
-
-			if ( (globvec->flags & ISCSI_GLOBALS_FLAGS_DATA_SEQ_IN_ORDER) != 0 )
-				scsi_device_config->flags |= ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_DATA_SEQ_IN_ORDER;
-
-			if ( (globvec->flags & ISCSI_GLOBALS_FLAGS_SCSI_IO_REMOVABLE) != 0 )
-				scsi_device_config->flags |= ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_REMOVABLE;
-
-			if ( (globvec->flags & ISCSI_GLOBALS_FLAGS_SCSI_IO_UNMAP) != 0 )
-				scsi_device_config->flags |= ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_UNMAP;
-
-			if ( (globvec->flags & ISCSI_GLOBALS_FLAGS_SCSI_IO_NO_ROTATION) != 0 )
-				scsi_device_config->flags |= ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_NO_ROTATION;
-
-			if ( (globvec->flags & ISCSI_GLOBALS_FLAGS_SCSI_IO_PHYSICAL_READ_ONLY) != 0 )
-				scsi_device_config->flags |= ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_PHYSICAL_READ_ONLY;
-
-			if ( (globvec->flags & ISCSI_GLOBALS_FLAGS_SCSI_IO_WRITE_PROTECT) != 0 )
-				scsi_device_config->flags |= ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_WRITE_PROTECT;
-
-			if ( (globvec->flags & ISCSI_GLOBALS_FLAGS_SCSI_IO_WRITE_CACHE) != 0 )
-				scsi_device_config->flags |= ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_WRITE_CACHE;
-
-			scsi_device_config->header_digest                  = globvec->header_digest;
-			scsi_device_config->data_digest                    = globvec->data_digest;
-			scsi_device_config->scsi_device_type               = globvec->scsi_device_type;
-			scsi_device_config->max_recv_ds_len                = globvec->max_recv_ds_len;
-			scsi_device_config->max_session_conns              = globvec->max_session_conns;
-			scsi_device_config->max_outstanding_r2t            = globvec->max_outstanding_r2t;
-			scsi_device_config->default_time_to_wait           = globvec->default_time_to_wait;
-			scsi_device_config->default_time_to_retain         = globvec->default_time_to_retain;
-			scsi_device_config->first_burst_len                = globvec->first_burst_len;
-			scsi_device_config->max_burst_len                  = globvec->max_burst_len;
-			scsi_device_config->err_recovery_level             = globvec->err_recovery_level;
-			scsi_device_config->scsi_physical_block_size       = globvec->scsi_physical_block_size;
-			scsi_device_config->scsi_physical_block_size_shift = globvec->scsi_physical_block_size_shift;
-			scsi_device_config->scsi_logical_block_size        = globvec->scsi_logical_block_size;
-			scsi_device_config->scsi_logical_block_size_shift  = globvec->scsi_logical_block_size_shift;
-
-			rc = iscsi_hashmap_put( globvec->scsi_device_config, hash_key, key_len, (uint8_t *) scsi_device_config );
-
-			if ( rc < 0 ) {
-				free( scsi_device_config );
-				iscsi_hashmap_key_destroy( hash_key );
-
-				return 0;
-			}
-		} else {
-			iscsi_hashmap_key_destroy( hash_key );
-		}
-
-		int32_t num_value = iscsi_config_parse_int( (uint8_t *) value );
-
-		if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_HEADER_DIGEST ) == 0 ) {
-			scsi_device_config->header_digest = ((strcasecmp( value, "CRC32C" ) == 0) ? ISCSI_DIGEST_SIZE : 0);
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DATA_DIGEST ) == 0 ) {
-			scsi_device_config->data_digest = ((strcasecmp( value, "CRC32C" ) == 0) ? ISCSI_DIGEST_SIZE : 0);
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_RECV_DS_LEN ) == 0 ) {
-			if ( (num_value >= 512L) && (num_value <= (int32_t) ISCSI_MAX_DS_SIZE) )
-				scsi_device_config->max_recv_ds_len = num_value;
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_ISCSI_MAX_CONNECTIONS_PER_SESSIONS ) == 0 ) {
-			if ( (num_value > 0L) && (num_value <= 65535L) )
-				scsi_device_config->max_session_conns = num_value;
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_OUTSTANDING_R2T ) == 0 ) {
-			if ( (num_value > 0L) && (num_value <= 65536L) )
-				scsi_device_config->max_outstanding_r2t = num_value;
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DEFAULT_TIME_WAIT ) == 0 ) {
-			if ( (uint32_t) num_value <= 3600UL )
-				scsi_device_config->default_time_to_wait = num_value;
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DEFAULT_TIME_RETAIN ) == 0 ) {
-			if ( (uint32_t) num_value <= 3600UL )
-				scsi_device_config->default_time_to_retain = num_value;
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_FIRST_BURST_LEN ) == 0 ) {
-			if ( (num_value >= 512L) && (num_value <= (int32_t) ISCSI_MAX_DS_SIZE) )
-				scsi_device_config->first_burst_len = num_value;
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_BURST_LEN ) == 0 ) {
-			if ( (num_value >= 512L) && (num_value <= (int32_t) ISCSI_MAX_DS_SIZE) )
-				scsi_device_config->max_burst_len = num_value;
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_INITIAL_R2T ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					scsi_device_config->flags |= ISCSI_GLOBALS_FLAGS_INIT_R2T;
-				else
-					scsi_device_config->flags &= ~ISCSI_GLOBALS_FLAGS_INIT_R2T;
-			}
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_IMMEDIATE_DATA ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					scsi_device_config->flags |= ISCSI_GLOBALS_FLAGS_IMMEDIATE_DATA;
-				else
-					scsi_device_config->flags &= ~ISCSI_GLOBALS_FLAGS_IMMEDIATE_DATA;
-			}
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DATA_PDU_IN_ORDER ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					scsi_device_config->flags |= ISCSI_GLOBALS_FLAGS_DATA_PDU_IN_ORDER;
-				else
-					scsi_device_config->flags &= ~ISCSI_GLOBALS_FLAGS_DATA_PDU_IN_ORDER;
-			}
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DATA_SEQ_IN_ORDER ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					scsi_device_config->flags |= ISCSI_GLOBALS_FLAGS_DATA_SEQ_IN_ORDER;
-				else
-					scsi_device_config->flags &= ~ISCSI_GLOBALS_FLAGS_DATA_SEQ_IN_ORDER;
-			}
-		} else if ( strcasecmp( key, (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_ERR_RECOVERY_LEVEL ) == 0 ) {
-			if ( (uint32_t) num_value <= 2UL )
-				scsi_device_config->err_recovery_level = num_value;
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_SCSI_KEY_DEVICE_TYPE ) == 0 ) {
-			if ( strcasecmp( value, "Sequential" ) == 0 )
-				scsi_device_config->scsi_device_type = ISCSI_SCSI_BASIC_INQUIRY_DATA_PERIPHERAL_TYPE_SEQ;
-			else if ( strcasecmp( value, "WriteOnce" ) == 0 )
-				scsi_device_config->scsi_device_type = ISCSI_SCSI_BASIC_INQUIRY_DATA_PERIPHERAL_TYPE_WORM;
-			else if ( strcasecmp( value, "ReadOnlyDirect" ) == 0 )
-				scsi_device_config->scsi_device_type = ISCSI_SCSI_BASIC_INQUIRY_DATA_PERIPHERAL_TYPE_RO_DIRECT;
-			else if ( strcasecmp( value, "OpticalMemory" ) == 0 )
-				scsi_device_config->scsi_device_type = ISCSI_SCSI_BASIC_INQUIRY_DATA_PERIPHERAL_TYPE_OPTICAL;
-			else if ( strcasecmp( value, "MediaChanger" ) == 0 )
-				scsi_device_config->scsi_device_type = ISCSI_SCSI_BASIC_INQUIRY_DATA_PERIPHERAL_TYPE_CHANGER;
-			else
-				scsi_device_config->scsi_device_type = ISCSI_SCSI_BASIC_INQUIRY_DATA_PERIPHERAL_TYPE_DIRECT;
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_SCSI_KEY_PHYSICAL_BLOCK_SIZE ) == 0 ) {
-			num_value = iscsi_align_pow2_ceil( num_value );
-
-			if ( (num_value >= 256L) && (num_value <= 32768L) ) {
-				scsi_device_config->scsi_physical_block_size       = num_value;
-				scsi_device_config->scsi_physical_block_size_shift = iscsi_get_log2_of_pow2( num_value );
-			}
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_SCSI_KEY_LOGICAL_BLOCK_SIZE ) == 0 ) {
-			num_value = iscsi_align_pow2_ceil( num_value );
-
-			if ( (num_value >= 256L) && (num_value <= 32768L) ) {
-				scsi_device_config->scsi_logical_block_size       = num_value;
-				scsi_device_config->scsi_logical_block_size_shift = iscsi_get_log2_of_pow2( num_value );
-			}
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_SCSI_KEY_REMOVABLE ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					scsi_device_config->flags |= ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_REMOVABLE;
-				else
-					scsi_device_config->flags &= ~ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_REMOVABLE;
-			}
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_SCSI_KEY_UNMAP ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					scsi_device_config->flags |= ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_UNMAP;
-				else
-					scsi_device_config->flags &= ~ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_UNMAP;
-			}
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_SCSI_KEY_NO_ROTATION ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					scsi_device_config->flags |= ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_NO_ROTATION;
-				else
-					scsi_device_config->flags &= ~ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_NO_ROTATION;
-			}
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_SCSI_KEY_PHYSICAL_READ_ONLY ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					scsi_device_config->flags |= ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_PHYSICAL_READ_ONLY;
-				else
-					scsi_device_config->flags &= ~ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_PHYSICAL_READ_ONLY;
-			}
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_SCSI_KEY_WRITE_PROTECT ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					scsi_device_config->flags |= ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_WRITE_PROTECT;
-				else
-					scsi_device_config->flags &= ~ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_WRITE_PROTECT;
-			}
-		} else if ( strcasecmp( key, ISCSI_GLOBALS_SECTION_SCSI_KEY_WRITE_CACHE ) == 0 ) {
-			if ( num_value != -2147483648L ) {
-				if ( num_value != 0L )
-					scsi_device_config->flags |= ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_WRITE_CACHE;
-				else
-					scsi_device_config->flags &= ~ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_WRITE_CACHE;
-			}
-		}
+	if ( *src == '\0' ) {
+		logadd( LOG_DEBUG1, "Empty value for numeric option '%s', ignoring", name );
+		return;
 	}
+	res = strtoll( src, (char **)&end, 10 ); // WTF why is the second arg not const char **
 
-	return 1;
-}
-
-/**
- * @brief Loads iSCSI server configuration from INI file.
- *
- * This function parses the INI configuration file
- * and assigns it to the config section of the iSCSI
- * global vector.
- *
- * @param[in] globvec Pointer to iSCSI global vector where to store
- * the parsed and processed results. May NOT be
- * NULL, so be careful.
- *
- * @return Number of configuration keys parsed or
- * a neagtive error code otherwise.
- */
-int iscsi_config_load(iscsi_globals *globvec)
-{
-	char *name = (char *) iscsi_sprintf_alloc( "%s/%s", _configDir, CONFIG_FILENAME );
-
-	if ( name == NULL )
-		return -1;
-
-	if ( !file_isReadable( name ) ) {
-		free( name );
-
-		return 0;
+	if ( end == NULL ) {
+		logadd( LOG_DEBUG1, "base 10 not valid! O.o" );
+		return;
 	}
-
-	pthread_mutex_lock( &globvec->scsi_device_config_mutex );
-	iscsi_hashmap_iterate( globvec->scsi_device_config, iscsi_hashmap_key_destroy_value_callback, NULL );
-	ini_parse( name, iscsi_config_load_from_ini, (void *) globvec );
-	free( name );
-
-	name = (char *) iscsi_sprintf_alloc( "%s/%s", _configDir, ISCSI_GLOBALS_CONFIG_FILENAME );
-
-	if ( name == NULL ) {
-		pthread_mutex_unlock( &globvec->scsi_device_config_mutex );
-
-		return -1;
+	if ( *end != '\0' ) {
+		logadd( LOG_DEBUG1, "Invalid non-numeric character in value for '%s': '%c' (0x%02x), ignoring option",
+				name, (int)*end, (int)*end );
+		return;
 	}
-
-	if ( !file_isReadable( name ) ) {
-		pthread_mutex_unlock( &globvec->scsi_device_config_mutex );
-		free( name );
-
-		return 0;
+	if ( res < 0 ) {
+		res = 0;
+	} else if ( res > INT_MAX ) {
+		res = INT_MAX;
 	}
-
-	ini_parse( name, iscsi_config_load_from_ini, (void *) globvec );
-	pthread_mutex_unlock( &globvec->scsi_device_config_mutex );
-	free( name );
-
-	return 1;
+	*dest = (int)res;
 }
 
-/**
- * @brief Finds an iSCSI SCSI device configuration by name using pattern matching.
- *
- * Callback function for each element while iterating
- * through the iSCSI SCSI device configuration hash
- * map.
- *
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] value Value of the key, NULL creates an
- * empty key assignment.
- * @param[in,out] user_data Pointer to a data structure
- * containing the iSCSI SCSI device configuration and
- * the name to be searched for and may NOT be NULL,
- * so be careful.
- * @retval -1 The SCSI device configuration has been found and
- * stored in the result structure. Therefore, no
- * further searching is needed.
- * @retval -2 An error occured during matching the
- * name.
- * @retval 0 The SCSI device configuration has not been found
- * yet.
- */
-int iscsi_config_get_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data)
+static void iscsi_copy_kvp_str(const char *name, const char **dest, const char *src)
 {
-	iscsi_scsi_device_config_find *scsi_device_config_find = (iscsi_scsi_device_config_find *) user_data;
-	const int rc                                           = fnmatch( (char *) key, (char *) scsi_device_config_find->name, (FNM_PATHNAME | FNM_PERIOD) );
-
-	if ( rc == FNM_NOMATCH )
-		return 0;
-
-	if ( rc != 0 )
-		return -2;
-
-	scsi_device_config_find->scsi_device_config = (iscsi_scsi_device_config *) value;
-
-	return -1;
-}
-
-/**
- * @brief Retrieves a configuration value either from the iSCSI global vector or for a specified SCSI device name.
- *
- * This function uses wildcard matching
- * only if the SCSI device name does NOT
- * have a direct match.
- *
- * @param[in] name Pointer to SCSI configuration name to
- * be retrieved or NULL if the iSCSI
- * global vector configuration should
- * be accessed instead.
- * @param[in] type Type of configuration to be
- * retrieved.
- * @return The requested configuration value or a
- * negative error code otherwise.
- */
-int32_t iscsi_config_get(uint8_t *name, const int type)
-{
-	if ( name != NULL ) {
-		const uint key_len = (uint) (strlen( (char *) name ) + 1U);
-		uint8_t *hash_key  = iscsi_hashmap_key_create( name, key_len );
-
-		if ( hash_key == NULL ) {
-			logadd( LOG_ERROR, "iscsi_config_get: Out of memory allocating memory for iSCSI SCSI device configuration key" );
-
-			return -1L;
-		}
-
-		pthread_mutex_lock( &iscsi_globvec->scsi_device_config_mutex );
-
-		iscsi_scsi_device_config *scsi_device_config = NULL;
-		int rc                                       = iscsi_hashmap_get( iscsi_globvec->scsi_device_config, hash_key, key_len, (uint8_t **) &scsi_device_config );
-
-		if ( rc < 0 ) {
-			iscsi_scsi_device_config_find scsi_device_config_find = {NULL, name};
-
-			rc = iscsi_hashmap_iterate(iscsi_globvec->scsi_device_config, iscsi_config_get_callback, (uint8_t *) &scsi_device_config_find );
-
-			scsi_device_config = scsi_device_config_find.scsi_device_config;
-
-			if ( scsi_device_config != NULL ) {
-				iscsi_scsi_device_config *new_scsi_device_config = (iscsi_scsi_device_config *) malloc( sizeof(struct iscsi_scsi_device_config) );
-
-				if ( new_scsi_device_config == NULL ) {
-					logadd( LOG_ERROR, "iscsi_config_get: Out of memory allocating memory for new iSCSI SCSI device configuration" );
-
-					pthread_mutex_unlock( &iscsi_globvec->scsi_device_config_mutex );
-					iscsi_hashmap_key_destroy( hash_key );
-
-					return -1L;
-				}
-
-				memcpy( new_scsi_device_config, scsi_device_config, sizeof(struct iscsi_scsi_device_config) );
-				rc = iscsi_hashmap_put( iscsi_globvec->scsi_device_config, hash_key, key_len, (uint8_t *) new_scsi_device_config );
-
-				if ( rc < 0 ) {
-					pthread_mutex_unlock( &iscsi_globvec->scsi_device_config_mutex );
-					free( new_scsi_device_config );
-					iscsi_hashmap_key_destroy( hash_key );
-
-					return -1L;
-				}
-
-				scsi_device_config = new_scsi_device_config;
-				hash_key           = NULL;
-			}
-		}
-
-		pthread_mutex_unlock( &iscsi_globvec->scsi_device_config_mutex );
-
-		if ( hash_key != NULL )
-			iscsi_hashmap_key_destroy( hash_key );
-
-		if ( scsi_device_config != NULL ) {
-			switch ( type ) {
-				case ISCSI_GLOBALS_CONFIG_TYPE_HEADER_DIGEST : {
-					return scsi_device_config->header_digest;
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_DATA_DIGEST : {
-					return scsi_device_config->data_digest;
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_MAX_RECV_DS_LEN : {
-					return scsi_device_config->max_recv_ds_len;
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_MAX_SESSION_CONNS : {
-					return scsi_device_config->max_session_conns;
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_MAX_OUTSTANDING_R2T : {
-					return scsi_device_config->max_outstanding_r2t;
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_DEFAULT_TIME_TO_WAIT : {
-					return scsi_device_config->default_time_to_wait;
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_DEFAULT_TIME_TO_RETAIN : {
-					return scsi_device_config->default_time_to_retain;
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_FIRST_BURST_LEN : {
-					return scsi_device_config->first_burst_len;
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_MAX_BURST_LEN : {
-					return scsi_device_config->max_burst_len;
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_ERR_RECOVERY_LEVEL : {
-					return scsi_device_config->err_recovery_level;
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_SCSI_PHYSICAL_BLOCK_SIZE : {
-					return scsi_device_config->scsi_physical_block_size;
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_SCSI_DEVICE_TYPE : {
-					return scsi_device_config->scsi_device_type;
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_SCSI_PHYSICAL_BLOCK_SIZE_SHIFT : {
-					return scsi_device_config->scsi_physical_block_size_shift;
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_SCSI_LOGICAL_BLOCK_SIZE : {
-					return scsi_device_config->scsi_logical_block_size;
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_SCSI_LOGICAL_BLOCK_SIZE_SHIFT : {
-					return scsi_device_config->scsi_logical_block_size_shift;
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_INIT_R2T : {
-					return (((scsi_device_config->flags & ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_INIT_R2T) != 0) ? 1L : 0L);
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_IMMEDIATE_DATA : {
-					return (((scsi_device_config->flags & ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_IMMEDIATE_DATA) != 0) ? 1L : 0L);
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_DATA_PDU_IN_ORDER : {
-					return (((scsi_device_config->flags & ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_DATA_PDU_IN_ORDER) != 0) ? 1L : 0L);
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_DATA_SEQ_IN_ORDER : {
-					return (((scsi_device_config->flags & ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_DATA_SEQ_IN_ORDER) != 0) ? 1L : 0L);
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_REMOVABLE : {
-					return (((scsi_device_config->flags & ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_REMOVABLE) != 0) ? 1L : 0L);
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_UNMAP : {
-					return (((scsi_device_config->flags & ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_UNMAP) != 0) ? 1L : 0L);
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_NO_ROTATION : {
-					return (((scsi_device_config->flags & ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_NO_ROTATION) != 0) ? 1L : 0L);
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_PHYSICAL_READ_ONLY : {
-					return (((scsi_device_config->flags & ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_PHYSICAL_READ_ONLY) != 0) ? 1L : 0L);
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_WRITE_PROTECT : {
-					return (((scsi_device_config->flags & ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_WRITE_PROTECT) != 0) ? 1L : 0L);
-
-					break;
-				}
-				case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_WRITE_CACHE : {
-					return (((scsi_device_config->flags & ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_WRITE_CACHE) != 0) ? 1L : 0L);
-
-					break;
-				}
-				default : {
-					return -1L;
-
-					break;
-				}
-			}
-		}
-	}
-
-	switch ( type ) {
-		case ISCSI_GLOBALS_CONFIG_TYPE_HEADER_DIGEST : {
-			return iscsi_globvec->header_digest;
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_DATA_DIGEST : {
-			return iscsi_globvec->data_digest;
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_MAX_RECV_DS_LEN : {
-			return iscsi_globvec->max_recv_ds_len;
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_MAX_SESSION_CONNS : {
-			return iscsi_globvec->max_session_conns;
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_MAX_OUTSTANDING_R2T : {
-			return iscsi_globvec->max_outstanding_r2t;
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_DEFAULT_TIME_TO_WAIT : {
-			return iscsi_globvec->default_time_to_wait;
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_DEFAULT_TIME_TO_RETAIN : {
-			return iscsi_globvec->default_time_to_retain;
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_FIRST_BURST_LEN : {
-			return iscsi_globvec->first_burst_len;
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_MAX_BURST_LEN : {
-			return iscsi_globvec->max_burst_len;
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_ERR_RECOVERY_LEVEL : {
-			return iscsi_globvec->err_recovery_level;
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_SCSI_DEVICE_TYPE : {
-			return iscsi_globvec->scsi_device_type;
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_SCSI_PHYSICAL_BLOCK_SIZE : {
-			return iscsi_globvec->scsi_physical_block_size;
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_SCSI_PHYSICAL_BLOCK_SIZE_SHIFT : {
-			return iscsi_globvec->scsi_physical_block_size_shift;
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_SCSI_LOGICAL_BLOCK_SIZE : {
-			return iscsi_globvec->scsi_logical_block_size;
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_SCSI_LOGICAL_BLOCK_SIZE_SHIFT : {
-			return iscsi_globvec->scsi_logical_block_size_shift;
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_INIT_R2T : {
-			return (((iscsi_globvec->flags & ISCSI_GLOBALS_FLAGS_INIT_R2T) != 0) ? 1L : 0L);
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_IMMEDIATE_DATA : {
-			return (((iscsi_globvec->flags & ISCSI_GLOBALS_FLAGS_IMMEDIATE_DATA) != 0) ? 1L : 0L);
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_DATA_PDU_IN_ORDER : {
-			return (((iscsi_globvec->flags & ISCSI_GLOBALS_FLAGS_DATA_PDU_IN_ORDER) != 0) ? 1L : 0L);
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_DATA_SEQ_IN_ORDER : {
-			return (((iscsi_globvec->flags & ISCSI_GLOBALS_FLAGS_DATA_SEQ_IN_ORDER) != 0) ? 1L : 0L);
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_REMOVABLE : {
-			return (((iscsi_globvec->flags & ISCSI_GLOBALS_FLAGS_SCSI_IO_REMOVABLE) != 0) ? 1L : 0L);
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_UNMAP : {
-			return (((iscsi_globvec->flags & ISCSI_GLOBALS_FLAGS_SCSI_IO_UNMAP) != 0) ? 1L : 0L);
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_NO_ROTATION : {
-			return (((iscsi_globvec->flags & ISCSI_GLOBALS_FLAGS_SCSI_IO_NO_ROTATION) != 0) ? 1L : 0L);
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_PHYSICAL_READ_ONLY : {
-			return (((iscsi_globvec->flags & ISCSI_GLOBALS_FLAGS_SCSI_IO_PHYSICAL_READ_ONLY) != 0) ? 1L : 0L);
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_WRITE_PROTECT : {
-			return (((iscsi_globvec->flags & ISCSI_GLOBALS_FLAGS_SCSI_IO_WRITE_PROTECT) != 0) ? 1L : 0L);
-
-			break;
-		}
-		case ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_WRITE_CACHE : {
-			return (((iscsi_globvec->flags & ISCSI_GLOBALS_FLAGS_SCSI_IO_WRITE_CACHE) != 0) ? 1L : 0L);
-
-			break;
-		}
-		default : {
-			return -1L;
-
-			break;
-		}
+	if ( *dest != NULL ) {
+		logadd( LOG_DEBUG1, "Received duplicate entry for key '%s', ignoring (new: %s, old: %s)", name, src, *dest );
+		return;
 	}
-
-	return -1L;
+	*dest = src;
 }
 
 /**
@@ -2371,76 +200,65 @@ int32_t iscsi_config_get(uint8_t *name, const int type)
  * a negative value in case of an error. This can be used for
  * incrementing the offset to the next key / value pair.
  */
-static int iscsi_parse_text_key_value_pair(iscsi_hashmap *key_value_pairs, const uint8_t *packet_data, const uint32_t len)
+static int iscsi_parse_text_key_value_pair(iscsi_negotiation_kvp *key_value_pairs, const char *packet_data, const uint32_t len)
 {
-	const uint key_val_len = (uint) strnlen( (char *) packet_data, len );
-	const uint8_t *key_end = memchr( packet_data, '=', key_val_len );
-
-	if ( key_end == NULL ) {
-		logadd( LOG_ERROR, "iscsi_parse_text_key_value_pair: Key / value separator '=' not found" );
+	int key_val_len = (int) strnlen( packet_data, len );
+	const char *key_end = memchr( packet_data, '=', key_val_len );
 
+	if ( key_val_len == (int)len ) {
+		logadd( LOG_DEBUG1, "iscsi_parse_text_key_value_pair: Final key/value pair not null-terminated, not spec compliant, aborting" );
 		return -1;
 	}
+	// Account for the trailing nullchar (for return value), which we also consumed
+	key_val_len++;
+
+	if ( key_end == NULL ) {
+		logadd( LOG_DEBUG1, "iscsi_parse_text_key_value_pair: Key/value separator '=' not found, ignoring" );
+		return key_val_len;
+	}
 
 	const uint key_len = (uint) (key_end - packet_data);
+	const uint val_len = (uint) (key_val_len - key_len - 1);
 
 	if ( key_len == 0U ) {
-		logadd( LOG_ERROR, "iscsi_parse_text_key_value_pair: Empty key found which is NOT allowed according to iSCSI specs" );
-
-		return -1;
+		logadd( LOG_DEBUG1, "iscsi_parse_text_key_value_pair: Empty key, not allowed according to iSCSI specs, ignoring" );
+		return key_val_len;
 	}
 
 	if ( key_len > ISCSI_TEXT_KEY_MAX_LEN ) {
-		logadd( LOG_ERROR, "iscsi_parse_text_key_value_pair: Key value is too large (max 63 bytes)" );
-
-		return -1;
+		logadd( LOG_DEBUG1, "iscsi_parse_text_key_value_pair: Key is too long (max %d bytes), ignoring", ISCSI_TEXT_KEY_MAX_LEN );
+		return key_val_len;
 	}
 
-	const uint hash_key_len = (key_len + 1U);
-	uint8_t *hash_key = iscsi_hashmap_key_create( packet_data, hash_key_len );
-
-	if ( hash_key == NULL )
-		return -1;
-
-	hash_key[key_len] = '\0';
-
-	if ( iscsi_hashmap_contains( key_value_pairs, hash_key, hash_key_len ) ) {
-		logadd( LOG_ERROR, "iscsi_parse_text_key_value_pair: Forbidden duplicate key discovered" );
-
-		iscsi_hashmap_key_destroy( hash_key );
-
-		return -1;
+	if ( val_len > ISCSI_TEXT_VALUE_MAX_LEN ) {
+		logadd( LOG_DEBUG1, "iscsi_parse_text_key_value_pair: Value for '%.*s' is too long (max %d bytes), ignoring",
+				(int)key_len, packet_data, ISCSI_TEXT_VALUE_MAX_LEN );
+		return key_val_len;
 	}
 
-	const uint val_len = (uint) (strnlen( (char *) (key_end + 1U), (key_val_len - key_len - 1U) ) + 1U);
-	const uint max_len = (((strcmp( (char *) hash_key, "CHAP_C" ) == 0) || (strcmp( (char *) hash_key, "CHAP_R" ) == 0)) ? ISCSI_TEXT_VALUE_MAX_LEN : ISCSI_TEXT_VALUE_MAX_SIMPLE_LEN);
-
-	if ( val_len > max_len ) {
-		logadd( LOG_ERROR, "iscsi_parse_text_key_value_pair: Value length larger than iSCSI specs allow" );
-
-		iscsi_hashmap_key_destroy( hash_key );
+#define COPY_KVP(type, key) \
+	else if ( strncmp( packet_data, #key, key_len ) == 0 ) iscsi_copy_kvp_ ## type ( #key, &key_value_pairs->key, key_end + 1 )
 
-		return -1;
+	if ( 0 ) {}
+	COPY_KVP( int, MaxRecvDataSegmentLength );
+	COPY_KVP( int, MaxBurstLength );
+	COPY_KVP( int, FirstBurstLength );
+	COPY_KVP( int, MaxConnections );
+	COPY_KVP( int, ErrorRecoveryLevel );
+	COPY_KVP( str, SessionType );
+	COPY_KVP( str, AuthMethod );
+	COPY_KVP( str, SendTargets );
+	COPY_KVP( str, HeaderDigest );
+	COPY_KVP( str, DataDigest );
+	COPY_KVP( str, InitiatorName );
+	COPY_KVP( str, TargetName );
+	else {
+		logadd( LOG_DEBUG1, "iscsi_parse_text_key_value_pair: Unknown option: '%.*s'", (int)key_len, packet_data );
 	}
 
-	uint8_t *hash_val = (uint8_t *) malloc( ISCSI_ALIGN(val_len, ISCSI_TEXT_VALUE_ALIGN) );
-
-	if ( hash_val == NULL ) {
-		logadd( LOG_ERROR, "iscsi_parse_text_key_value_pair: Out of memory allocating memory for value string" );
-
-		iscsi_hashmap_key_destroy( hash_key );
-
-		return -1;
-	}
+#undef COPY_KVP
 
-	memcpy( hash_val, (key_end + 1), val_len );
-
-	const int rc = iscsi_hashmap_put( key_value_pairs, hash_key, hash_key_len, hash_val );
-
-	if ( rc < 0 )
-		return -1;
-
-	return (int) (hash_key_len + val_len);
+	return (int)key_val_len;
 }
 
 /**
@@ -2450,84 +268,35 @@ static int iscsi_parse_text_key_value_pair(iscsi_hashmap *key_value_pairs, const
  * data amd puts the extracted data into a hash map to be used by
  * the iSCSI implementation.
  *
- * @param[in] key_value_pairs Pointer to hash map that should contain all
+ * @param[in] pairs struct to write all key-value-pair options from packet to
  * extracted keys and pairs. May NOT be NULL, so take caution.
  * @param[in] packet_data Pointer to first key and value pair to
  * be parsed. NULL is an illegal value here, so be careful.
  * @param[in] len Length of the remaining packet data.
- * @param[in] c_bit Non-zero value of C bit was set in previously.
- * @param[in] partial_pairs Array of partial pair pointers in
- * case C bit was set (multiple iSCSI packets for text data).
  * @retval -1 An error occured during parsing key.
  * @retval 0 Key and value pair was parsed successfully and was added to
  * hash map.
  */
-int iscsi_parse_key_value_pairs(iscsi_hashmap *key_value_pairs, const uint8_t *packet_data, uint len, int c_bit, uint8_t **partial_pairs)
+static int iscsi_parse_login_key_value_pairs(iscsi_negotiation_kvp *pairs, const uint8_t *packet_data, uint len)
 {
+	memset( pairs, -1 , sizeof(*pairs) );
+	pairs->SessionType = NULL;
+	pairs->AuthMethod = NULL;
+	pairs->SendTargets = NULL;
+	pairs->HeaderDigest = NULL;
+	pairs->DataDigest = NULL;
+	pairs->InitiatorName = NULL;
+	pairs->TargetName = NULL;
+
 	if ( len == 0U )
 		return 0; // iSCSI specs don't allow zero length
 
-	if ( (partial_pairs != NULL) && (*partial_pairs != NULL) ) { // Strip partial text parameters in case C bit was enabled previously
-		uint key_val_pair_len;
-
-		for (key_val_pair_len = 0; (key_val_pair_len < len) && packet_data[key_val_pair_len] != '\0'; key_val_pair_len++) {
-		}
-
-		uint8_t *tmp_partial_buf = iscsi_sprintf_alloc( "%s%s", *partial_pairs, (const char *) packet_data );
-
-		if ( tmp_partial_buf == NULL )
-			return -1;
-
-		const int rc = iscsi_parse_text_key_value_pair( key_value_pairs, tmp_partial_buf, (uint32_t) (key_val_pair_len + strlen( (char *) *partial_pairs )) );
-		free( tmp_partial_buf );
-
-		if ( rc < 0 )
-			return -1;
-
-		free( *partial_pairs );
-		*partial_pairs = NULL;
-
-		packet_data += (key_val_pair_len + 1);
-		len         -= (key_val_pair_len + 1);
-	}
-
-	if ( c_bit ) { // Strip partial parameters in case C bit was enabled previousley
-		if ( partial_pairs == NULL ) {
-			logadd( LOG_ERROR, "iscsi_parse_key_value_pairs: C bit set but missing partial parameter" );
-
-			return -1;
-		}
-
-		uint key_val_pair_len;
-
-		for (key_val_pair_len = (len - 1U); (packet_data[key_val_pair_len] != '\0') && (key_val_pair_len > 0U); key_val_pair_len--) {
-		}
-
-		if ( key_val_pair_len != 0U )
-			key_val_pair_len++; // NUL char found, don't copy to target buffer'
-
-		*partial_pairs = (uint8_t *) malloc( ((len - key_val_pair_len) + 1U) );
-
-		if ( *partial_pairs == NULL ) {
-			logadd( LOG_ERROR, "iscsi_parse_key_value_pairs: Out of memory allocating partial parameter" );
-
-			return -1;
-		}
-
-		memcpy( *partial_pairs, &packet_data[key_val_pair_len], (len - key_val_pair_len) );
-
-		if ( key_val_pair_len != 0U )
-			len = (key_val_pair_len - 1U);
-		else
-			return 0;
-	}
-
 	int offset = 0;
 
 	while ( ((uint) offset < len) && (packet_data[offset] != '\0') ) {
-		const int rc = iscsi_parse_text_key_value_pair( key_value_pairs, (packet_data + offset), (len - offset) );
+		const int rc = iscsi_parse_text_key_value_pair( pairs, (const char *)(packet_data + offset), (len - offset) );
 
-		if ( rc < 0 )
+		if ( rc <= 0 )
 			return -1;
 
 		offset += rc;
@@ -2537,280 +306,6 @@ int iscsi_parse_key_value_pairs(iscsi_hashmap *key_value_pairs, const uint8_t *p
 }
 
 /**
- * @brief Extracts a string from a key and value pair.
- *
- * This function calculates the length of the key
- * for the hash map function and returns the value
- * as string.
- *
- * @param[in] key_value_pairs The hash map containing the key and value pairs to be extracted.
- * @param[in] key The key to retrieve the string value from.
- * @param[out] out_value The string value of the key is stored here.
- * @retval -1 An error occured during value retrieval.
- * 'out value' is unchanged.
- * @retval 0 The value of the key has been successfully
- * stored in the 'out_value'.
- */
-static int iscsi_get_key_value_pair(iscsi_hashmap *key_value_pairs, const uint8_t *key, uint8_t **out_value)
-{
-	const uint key_len = (uint) (strlen( (char *) key ) + 1U);
-
-	return iscsi_hashmap_get( key_value_pairs, key, key_len, out_value );
-}
-
-/**
- * @brief Allocates and adds a string value to a key / value hash map pair.
- *
- * This function allocates memory for a string key
- * and its string value.
- *
- * @param[in] key_value_pairs Pointer to the hash map which should
- * contain the added string key and value pair.
- * NULL is NOT allowed here, so be careful.
- * @param[in] key String containing the key name as string. May
- * NOT be NULL, so take caution.
- * @param[in] value String containing the value to be stored.
- * @return 0 on successful operation, or a negative value on
- * error (memory exhaustion).
- */
-static int iscsi_add_key_value_pair(iscsi_hashmap *key_value_pairs, const uint8_t *key, const uint8_t *value)
-{
-	const uint key_len = (uint) (strlen( (char *) key ) + 1U);
-	uint8_t *hash_key = iscsi_hashmap_key_create( key, key_len );
-
-	if ( hash_key == NULL ) {
-		logadd( LOG_ERROR, "iscsi_add_key_value_pair: Out of memory allocating key" );
-
-		return -1;
-	}
-
-	const uint val_len = (uint) (strlen( (char *) value ) + 1U);
-	uint8_t *hash_val = (uint8_t *) malloc( ISCSI_ALIGN(val_len, ISCSI_TEXT_VALUE_ALIGN) );
-
-	if ( hash_val == NULL ) {
-		logadd( LOG_ERROR, "iscsi_add_key_value_pair: Out of memory allocating string value" );
-
-		iscsi_hashmap_key_destroy( hash_key );
-
-		return -1;
-	}
-
-	memcpy( hash_val, value, val_len );
-
-	return iscsi_hashmap_put( key_value_pairs, hash_key, key_len, hash_val );
-}
-
-/**
- * @brief Allocates and updates a string value of a key / value hash map pair.
- *
- * This function allocates memory for a string key
- * and its string value.\n
- * If the key does not exist, it will be added as
- * a new one.
- *
- * @param[in] key_value_pairs Pointer to the hash map which should
- * contain the updated string key and value pair.
- * NULL is NOT allowed here, so be careful.
- * @param[in] key String containing the key name as string. May
- * NOT be NULL, so take caution.
- * @param[in] value String containing the value to be stored.
- * @return 0 on successful operation, or a negative value on
- * error (memory exhaustion).
- */
-static int iscsi_update_key_value_pair(iscsi_hashmap *key_value_pairs, const uint8_t *key, const uint8_t *value)
-{
-	const uint key_len = (uint) (strlen( (char *) key ) + 1U);
-	uint8_t *hash_key = iscsi_hashmap_key_create( key, key_len );
-
-	if ( hash_key == NULL ) {
-		logadd( LOG_ERROR, "iscsi_update_key_value_pair: Out of memory allocating key" );
-
-		return -1;
-	}
-
-	const uint val_len = (uint) (strlen( (char *) value ) + 1U);
-	uint8_t *hash_val = (uint8_t *) malloc( ISCSI_ALIGN(val_len, ISCSI_TEXT_VALUE_ALIGN) );
-
-	if ( hash_val == NULL ) {
-		logadd( LOG_ERROR, "iscsi_update_key_value_pair: Out of memory allocating string value" );
-
-		iscsi_hashmap_key_destroy( hash_key );
-
-		return -1;
-	}
-
-	memcpy( hash_val, value, val_len );
-
-	return iscsi_hashmap_put_free( key_value_pairs, hash_key, key_len, hash_val, iscsi_hashmap_key_destroy_value_callback, NULL );
-}
-
-/**
- * @brief Extracts an integer value from a key and value pair.
- *
- * This function converts a string representation of a
- * key and value pair to an integer value.
- *
- * @param[in] key_value_pairs The hash map containing the key and value pairs to be extracted.
- * @param[in] key The key to retrieve the integer value from.
- * @param[out] out_value The integer value of the key is stored here
- * or 0 in case of an error during string to integer conversion.
- * @retval -1 An error occured during value retrieval.
- * 'out value' is unchanged.
- * @retval 0 The value of the key has been successfully
- * stored in the 'out_value'.
- */
-static int iscsi_get_int_key_value_pair(iscsi_hashmap *key_value_pairs, const uint8_t *key, int32_t *out_value)
-{
-	uint8_t *str_val;
-	int rc = iscsi_get_key_value_pair( key_value_pairs, key, &str_val );
-
-	if ( rc == 0 )
-		*out_value = (int32_t) atol( (char *) str_val );
-
-	return rc;
-}
-
-/**
- * @brief Allocates and adds an integer value to a key / value hash map pair.
- *
- * This function allocates memory for a string key
- * and its integer representation as string value.
- *
- * @param[in] key_value_pairs Pointer to the hash map which should
- * contain the added integer key and value pair.
- * NULL is NOT allowed here, so be careful.
- * @param[in] key String containing the key name as string. May
- * NOT be NULL, so take caution.
- * @param[in] value Integer containing the value to be stored.
- * @return 0 on successful operation, or a negative value on
- * error (memory exhaustion).
- */
-static int iscsi_add_int_key_value_pair(iscsi_hashmap *key_value_pairs, const uint8_t *key, const int32_t value)
-{
-	const uint8_t *hash_val = iscsi_sprintf_alloc( "%" PRId32, value );
-
-	if ( hash_val == NULL ) {
-		logadd( LOG_ERROR, "iscsi_add_int_key_value_pair: Out of memory allocating integer value." );
-
-		return -1;
-	}
-
-	return iscsi_add_key_value_pair( key_value_pairs, key, hash_val );
-}
-
-/**
- * @brief Allocates and updates an integer value of a key / value hash map pair.
- *
- * This function allocates memory for a string key
- * and its integer representation as string value.\n
- * If the key does not exist, it will be added as
- * a new one.
- *
- * @param[in] key_value_pairs Pointer to the hash map which should
- * contain the updated integer key and value pair.
- * NULL is NOT allowed here, so be careful.
- * @param[in] key String containing the key name as string. May
- * NOT be NULL, so take caution.
- * @param[in] value Integer containing the value to be stored.
- * @return 0 on successful operation, or a negative value on
- * error (memory exhaustion).
- */
-static int iscsi_update_int_key_value_pair(iscsi_hashmap *key_value_pairs, const uint8_t *key, const int32_t value)
-{
-	uint8_t *hash_val = iscsi_sprintf_alloc( "%" PRId32, value );
-
-	if ( hash_val == NULL ) {
-		logadd( LOG_ERROR, "iscsi_update_int_key_value_pair: Out of memory allocating integer value." );
-
-		return -1;
-	}
-
-	const int rc = iscsi_update_key_value_pair( key_value_pairs, key, hash_val );
-
-	free( hash_val );
-
-	return rc;
-}
-
-/**
- * @brief Extracts a boolean value from a key and value pair.
- *
- * This function converts a string representation of a
- * key and value pair to a boolean value.
- *
- * @param[in] key_value_pairs The hash map containing the key and value pairs to be extracted.
- * @param[in] key The key to retrieve the boolean value from.
- * @param[out] out_value The boolean value of the key is stored here.
- * 'Yes' represents true and any other string results in false.
- * @retval -1 An error occured during value retrieval.
- * 'out value' is unchanged.
- * @retval 0 The value of the key has been successfully
- * stored in the 'out_value'.
- */
-static int iscsi_get_bool_key_value_pair(iscsi_hashmap *key_value_pairs, const uint8_t *key, int32_t *out_value)
-{
-	uint8_t *value;
-	int rc = iscsi_get_key_value_pair( key_value_pairs, key, &value );
-
-	if ( rc == 0 )
-		*out_value = (strcasecmp( (char *) value, "Yes" ) == 0);
-
-	return rc;
-}
-
-/**
- * @brief Allocates and adds an boolean value to a key / value hash map pair.
- *
- * This function allocates memory for a string key
- * and its integer value.\n
- * The string representation for true is: Yes\n
- * The string representation for false is: No
- *
- * @param[in] key_value_pairs Pointer to the hash map which should
- * contain the added boolean key and value pair.
- * NULL is NOT allowed here, so be careful.
- * @param[in] key String containing the key name as string. May
- * NOT be NULL, so take caution.
- * @param[in] value Boolean containing the value to be stored
- * as string.
- * @return 0 on successful operation, or a negative value on
- * error (memory exhaustion).
- */
-static int iscsi_add_bool_key_value_pair(iscsi_hashmap *key_value_pairs, const uint8_t *key, const int value)
-{
-	const uint8_t *hash_val = (uint8_t *) ((value != 0) ? "Yes" : "No");
-
-	return iscsi_add_key_value_pair( key_value_pairs, key, hash_val );
-}
-
-/**
- * @brief Allocates and updates an boolean value of a key / value hash map pair.
- *
- * This function allocates memory for a string key
- * and its integer value.\n
- * The string representation for true is: Yes\n
- * The string representation for false is: No\n
- * If the key does not exist, it will be added as
- * a new one.
- *
- * @param[in] key_value_pairs Pointer to the hash map which should
- * contain the updated boolean key and value pair.
- * NULL is NOT allowed here, so be careful.
- * @param[in] key String containing the key name as string. May
- * NOT be NULL, so take caution.
- * @param[in] value Boolean containing the value to be stored
- * as string.
- * @return 0 on successful operation, or a negative value on
- * error (memory exhaustion).
- */
-static int iscsi_update_bool_key_value_pair(iscsi_hashmap *key_value_pairs, const uint8_t *key, const int value)
-{
-	const uint8_t *hash_val = (uint8_t *) ((value != 0) ? "Yes" : "No");
-
-	return iscsi_update_key_value_pair( key_value_pairs, key, hash_val );
-}
-
-/**
  * @brief Allocates and initializes an iSCSI task structure.
  *
  * This function also initializes the underlying
@@ -2822,18 +317,12 @@ static int iscsi_update_bool_key_value_pair(iscsi_hashmap *key_value_pairs, cons
  * @param[in] conn Pointer to iSCSI connection to associate
  * the task with. May NOT be NULL, so take
  * caution.
- * @param[in] parent Pointer to parent iSCSI task to copy
- * over SCSI task data from.
- * @param[in] callback Callback function to be invoked
- * after data transfer has been completed and
- * may be NULL in case no further action is
- * required.
  * @return Pointer to iSCSI task structure or NULL
  * in case of an error (memory exhaustion).
  */
-iscsi_task *iscsi_task_create(iscsi_connection *conn, iscsi_task *parent, iscsi_scsi_task_xfer_complete_callback callback)
+static iscsi_task *iscsi_task_create(iscsi_connection *conn)
 {
-	iscsi_task *task = (iscsi_task *) malloc( sizeof(struct iscsi_task) );
+	iscsi_task *task = malloc( sizeof(struct iscsi_task) );
 
 	if ( task == NULL ) {
 		logadd( LOG_ERROR, "iscsi_task_create: Out of memory while allocating iSCSI task" );
@@ -2841,14 +330,7 @@ iscsi_task *iscsi_task_create(iscsi_connection *conn, iscsi_task *parent, iscsi_
 		return NULL;
 	}
 
-	task->node.succ         = NULL;
-	task->node.pred         = NULL;
-	task->parent            = parent;
-	task->sub_tasks.head    = NULL;
-	task->sub_tasks.tail    = NULL;
-	task->sub_tasks.pred    = NULL;
 	task->conn              = conn;
-	task->pdu               = NULL;
 	task->pos               = 0UL;
 	task->len               = 0UL;
 	task->id                = 0ULL;
@@ -2859,77 +341,14 @@ iscsi_task *iscsi_task_create(iscsi_connection *conn, iscsi_task *parent, iscsi_
 	task->des_data_xfer_pos = 0UL;
 	task->des_data_xfer_len = 0UL;
 	task->data_sn           = 0UL;
-	task->scsi_data_out_cnt = 0UL;
-	task->r2t_len           = 0UL;
-	task->r2t_sn            = 0UL;
-	task->r2t_next_exp_pos  = 0UL;
-	task->r2t_data_sn       = 0UL;
-	task->r2t_sn_ack        = 0UL;
-	task->r2t_outstanding   = 0UL;
-
-	conn->task_cnt++;
-
-	iscsi_scsi_task_create( &task->scsi_task, callback, iscsi_task_destroy_callback );
-
-	if ( parent != NULL ) {
-		parent->scsi_task.ref++;
 
-		task->init_task_tag = parent->init_task_tag;
-		task->lun_id        = parent->lun_id;
-
-		task->scsi_task.flags       = parent->scsi_task.flags;
-		task->scsi_task.xfer_len    = parent->scsi_task.xfer_len;
-		task->scsi_task.lun         = parent->scsi_task.lun;
-		task->scsi_task.cdb         = parent->scsi_task.cdb;
-		task->scsi_task.target_port = parent->scsi_task.target_port;
-		task->scsi_task.init_port   = parent->scsi_task.init_port;
-
-		if ( (task->scsi_task.flags & ISCSI_SCSI_TASK_FLAGS_XFER_READ) != 0 )
-			conn->scsi_data_in_cnt++;
-	}
+	iscsi_scsi_task_create( &task->scsi_task );
+	task->scsi_task.connection = conn;
 
 	return task;
 }
 
 /**
- * @brief Deallocates all resources of the iSCSI task of an iSCSI SCSI task.
- *
- * This callback function is called when the
- * iSCSI SCSI task itself is about to be
- * destroyed in order to free the associated
- * iSCSI task and PDU.
- *
- * @param[in] scsi_task Pointer to iSCSI SCSI task to deallocate
- * its iSCSI task. May NOT be NULL, so ba
- * careful.
- */
-void iscsi_task_destroy_callback(iscsi_scsi_task *scsi_task)
-{
-	if ( scsi_task != NULL ) {
-		iscsi_task *task = ISCSI_CONTAINER(iscsi_task, scsi_task, scsi_task);
-
-		if ( task->parent != NULL ) {
-			if ( (task->scsi_task.flags & ISCSI_SCSI_TASK_FLAGS_XFER_READ) != 0 )
-				task->conn->scsi_data_in_cnt--;
-
-			iscsi_scsi_task_destroy( &task->parent->scsi_task );
-
-			task->parent = NULL;
-		}
-
-		if ( task->pdu != NULL ) {
-			iscsi_connection_pdu_destroy( task->pdu );
-
-			task->pdu = NULL;
-		}
-
-		task->conn->task_cnt--;
-
-		free( task );
-	}
-}
-
-/**
  * @brief Deallocates resources acquired by iscsi_task_create.
  *
  * This function also frees the embedded SCSI task.
@@ -2937,361 +356,13 @@ void iscsi_task_destroy_callback(iscsi_scsi_task *scsi_task)
  * @param[in] task Pointer to iSCSI task to deallocate. If
  * set to NULL, this function does nothing.
  */
-void iscsi_task_destroy(iscsi_task *task)
-{
-	if ( task != NULL )
-		iscsi_scsi_task_destroy( &task->scsi_task );
-}
-
-/**
- * @brief Enqueues an iSCSI task.
- *
- * This function adds an iSCSI task to a
- * SCSI queue.
- *
- * @param[in] conn Pointer to iSCSI connection to enqueue
- * the task to and may NOT be NULL, so be
- * careful.
- * @param[in] task Pointer to iSCSI task to enqueue to the
- * associated device. NULL is not allowed
- * here, take caution.
- */
-void iscsi_task_queue(iscsi_connection *conn, iscsi_task *task)
+static void iscsi_task_destroy(iscsi_task *task)
 {
-	task->flags |= ISCSI_TASK_FLAGS_QUEUED;
-
-	iscsi_device_scsi_task_queue( conn->device, &task->scsi_task );
-}
-
-/**
- * @brief Searches an iSCSI task by Target Transfer Tag (TTT).
- *
- * This function searches for an iSCSI task by
- * iterating through the iSCSI connection active
- * Ready To Transfer tasks doubly linked list.
- *
- * @param[in] conn Pointer to iSCSI connection to
- * search in the active Ready To Transfer tasks
- * doubly linked list and may NOT be NULL, so
- * be careful.
- * @param[in] target_xfer_tag Target Transfer Tag (TTT)
- * to be searched for.
- * @return Pointer to found iSCSI task or NULL in
- * case no iSCSI task has a matching Target
- * Transfer Tag (TTT).
- */
-static iscsi_task *iscsi_task_find(iscsi_connection *conn, const uint32_t target_xfer_tag)
-{
-	iscsi_task *task;
-
-	iscsi_list_foreach_node ( &conn->r2t_tasks_active, task ) {
-		if ( task->target_xfer_tag == target_xfer_tag )
-			return task;
-	}
-
-	return NULL;
-}
-
-/**
- * @brief Removes all iSCSI SCSI sub tasks of a primary task which completed a read data transfer in case data sequence is in order.
- *
- * This function removes all sub tasks of an iSCSI
- * primary task which have finished their transfers
- * when the data sequence is in order.
- *
- * @param[in] conn Pointer to iSCSI connection of which
- * the data transfer has been finished and
- * may NOT be NULL, so be careful.
- * @param[in] primary_task Pointer to iSCSI primary task
- * of which to remove all sub tasks which have
- * finished the data transfer. NULL is NOT allowed
- * here, so take caution.
- */
-static void iscsi_task_xfer_complete_process_read_sub_tasks(iscsi_connection *conn, iscsi_task *primary_task)
-{
-	iscsi_task *sub_task;
-	iscsi_task *tmp;
-
-	iscsi_list_foreach_safe_node ( &primary_task->sub_tasks, sub_task, tmp ) {
-		if ( primary_task->des_data_xfer_pos != sub_task->scsi_task.pos )
-			break;
-
-		iscsi_list_remove( &sub_task->node );
-
-		primary_task->des_data_xfer_pos += sub_task->scsi_task.len;
-
-		if ( primary_task->des_data_xfer_pos == primary_task->scsi_task.xfer_len )
-			iscsi_task_destroy( primary_task );
-
-		iscsi_task_response( conn, sub_task );
-		iscsi_task_destroy( sub_task );
-	}
-}
-
-/**
- * @brief Processes an iSCSI SCSI task which completed a read data transfer.
- *
- * This function post-processes a task upon
- * finish of a read data transfer.
- *
- * @param[in] conn Pointer to iSCSI connection of which
- * the data transfer has been finished and
- * may NOT be NULL, so be careful.
- * @param[in] task Pointer to iSCSI task which finished
- * the data transfer. NULL is NOT allowed
- * here, so take caution.
- * @param[in] primary_task Pointer to iSCSI primary task
- * which finished the data transfer which
- * may NOT be NULL, so be careful.
- */
-void iscsi_task_xfer_complete_process_read(iscsi_connection *conn, iscsi_task *task, iscsi_task *primary_task)
-{
-	if ( task->scsi_task.status != ISCSI_SCSI_STATUS_GOOD ) {
-		if ( primary_task->scsi_task.status == ISCSI_SCSI_STATUS_GOOD ) {
-			iscsi_task *sub_task;
-
-			iscsi_list_foreach_node ( &primary_task->sub_tasks, sub_task ) {
-				iscsi_scsi_task_status_copy( &sub_task->scsi_task, &task->scsi_task );
-			}
-
-			iscsi_scsi_task_status_copy( &primary_task->scsi_task, &task->scsi_task );
-		}
-	} else if ( primary_task->scsi_task.status != ISCSI_SCSI_STATUS_GOOD ) {
-		iscsi_scsi_task_status_copy( &task->scsi_task, &primary_task->scsi_task );
-	}
-
-	if ( task == primary_task ) {
-		primary_task->des_data_xfer_pos = task->scsi_task.len;
-
-		iscsi_task_response( conn, task );
-		iscsi_task_destroy( task );
-	} else if ( (conn->session->flags & ISCSI_SESSION_FLAGS_DATA_SEQ_IN_ORDER) == 0 ) {
-		primary_task->des_data_xfer_pos += task->scsi_task.len;
-
-		if ( primary_task->des_data_xfer_pos == primary_task->scsi_task.xfer_len )
-			iscsi_task_destroy(primary_task );
-
-		iscsi_task_response( conn, task );
-		iscsi_task_destroy( task );
-	} else if ( task->scsi_task.pos != primary_task->des_data_xfer_pos ) {
-		iscsi_task *sub_task;
-
-		iscsi_list_foreach_node ( &primary_task->sub_tasks, sub_task ) {
-			if ( task->scsi_task.pos < sub_task->scsi_task.pos ) {
-				iscsi_list_insert( &primary_task->sub_tasks, &sub_task->node, task->node.pred );
-
-				return;
-			}
-		}
-
-		iscsi_list_enqueue( &primary_task->sub_tasks, &task->node );
-	} else {
-		iscsi_list_push( &primary_task->sub_tasks, &task->node );
-
-		iscsi_task_xfer_complete_process_read_sub_tasks( conn, primary_task );
-	}
-}
-
-/**
- * @brief Adds an iSCSI transfer task to either pending (if maximum is exceeded) or active tasks doubly linked list.
- *
- * This function also sends Ready To Transfer
- * (R2T) packet data to the initiator.
- *
- * @param[in] conn Pointer to iSCSI connection to add the
- * transfer task to. May NOT be NULL, so be
- * careful.
- * @param[in] task Pointer to iSCSI task to add to
- * active or pending doubly linked list.
- * NULL is NOT allowed here, take caution.
- * @return 0 on successful operation, a negative
- * error code otherwise.
- */
-static int iscsi_task_xfer_add(iscsi_connection *conn, iscsi_task *task)
-{
-	const uint32_t xfer_len     = task->scsi_task.xfer_len;
-	uint32_t ds_len             = task->pdu->ds_len;
-	const uint32_t seg_len      = ISCSI_DEFAULT_MAX_RECV_DS_LEN;
-	const uint32_t data_out_req = (uint32_t) (iscsi_is_pow2( seg_len ) ? (((xfer_len - ds_len - 1UL) >> iscsi_get_log2_of_pow2( seg_len )) + 1UL) : (((xfer_len - ds_len - 1UL) / seg_len) + 1UL));
-
-	task->scsi_data_out_cnt = data_out_req;
-
-	if ( conn->r2t_pending >= ISCSI_DEFAULT_MAX_R2T_PER_CONNECTION ) {
-		iscsi_list_enqueue( &conn->r2t_tasks_queue, &task->node );
-
-		return ISCSI_CONNECT_PDU_READ_OK;
-	}
-
-	conn->scsi_data_out_cnt += data_out_req;
-	conn->r2t_pending++;
-
-	task->r2t_next_exp_pos = ds_len;
-	task->r2t_len          = 0UL;
-	task->r2t_sn           = 0UL;
-
-	if ( ++conn->target_xfer_tag == 0xFFFFFFFFUL )
-		conn->target_xfer_tag = 0UL;
-
-	task->target_xfer_tag = conn->target_xfer_tag;
-
-	const uint32_t max_burst_len = conn->session->max_burst_len;
-
-	while ( ds_len != xfer_len ) {
-		uint32_t len = (xfer_len - ds_len);
-
-		if ( len > max_burst_len )
-			len = max_burst_len;
-
-		const int rc = iscsi_r2t_send( conn, task, &task->r2t_sn, ds_len, len, task->target_xfer_tag );
-
-		if ( rc < 0 )
-			return rc;
-
-		ds_len += len;
-
-		task->r2t_next_exp_pos = ds_len;
-
-		if ( conn->session->max_outstanding_r2t == ++task->r2t_outstanding )
-			break;
-	}
-
-	iscsi_list_enqueue( &conn->r2t_tasks_active, &task->node );
-
-	task->flags |= ISCSI_TASK_FLAGS_R2T_ACTIVE;
-
-	return ISCSI_CONNECT_PDU_READ_OK;
-}
-
-/**
- * @brief Starts queued iSCSI Ready To Transfer (R2T) tasks by moving them from queued doubly linked list to active doubly linked list.
- *
- * This function iterates through all enqueued
- * transfer tasks of an ISCSI connection and moves
- * them into the active transfer tasks doubly
- * linked list until the maximum number of active
- * transfer tasks has been reached.
- *
- * @param[in] conn Pointer to iSCSI connection from where to
- * move the enqueued iSCSI tasks to the active task
- * doubly linked list. May NOT be NULL, so be
- * careful.
- */
-static void iscsi_task_xfer_queued_tasks_start(iscsi_connection *conn)
-{
-	iscsi_task *task;
-	iscsi_task *tmp;
-
-	iscsi_list_foreach_safe_node ( &conn->r2t_tasks_queue, task, tmp ) {
-		if ( conn->r2t_pending >= ISCSI_DEFAULT_MAX_R2T_PER_CONNECTION )
-			return;
-
-		iscsi_list_remove( &task->node );
-		iscsi_task_xfer_add( conn, task );
-	}
-}
-
-/**
- * @brief Deletes an iSCSI task from the active Ready To Transfer (R2T) doubly linked list by Target Transfer Tag (TTT).
- *
- * This function traverses through an iSCSI task's
- * active Ready To Transfer (R2T) doubly linked
- * list in order to find the Target Transfer Tag
- * (TTT) to be deleted.
- *
- * @param[in] conn Pointer to iSCSI connection to
- * search in the active Ready To Transfer
- * (R2T) doubly linked list.
- * @param[in] target_xfer_tag Target Transfer Tag (TTT) to
- * delete the ISCSI task of.
- * @retval true The iSCSI task has been found and
- * deleted successfully.
- * @retval false The iSCSI task does NOT exist and
- * therefore could NOT be deleted.
- */
-bool iscsi_task_xfer_del(iscsi_connection *conn, const uint32_t target_xfer_tag)
-{
-	iscsi_task *task;
-	iscsi_task *tmp;
-
-	iscsi_list_foreach_safe_node ( &conn->r2t_tasks_active, task, tmp ) {
-		if ( task->target_xfer_tag != target_xfer_tag )
-			continue;
-
-		conn->scsi_data_out_cnt -= task->scsi_data_out_cnt;
-		conn->r2t_pending--;
-
-		iscsi_list_remove( &task->node );
-
-		task->flags &= ~ISCSI_TASK_FLAGS_R2T_ACTIVE;
-
-		iscsi_task_destroy( task );
-		iscsi_task_xfer_queued_tasks_start( conn );
-
-		return true;
-	}
-
-	return false;
-}
-
-/**
- * @brief Processes an iSCSI SCSI task which completed a non-read data transfer.
- *
- * This function post-processes a task upon
- * finish of a non-read data transfer.
- *
- * @param[in] conn Pointer to iSCSI connection of which
- * the data transfer has been finished and
- * may NOT be NULL, so be careful.
- * @param[in] task Pointer to iSCSI task which finished
- * the data transfer. NULL is NOT allowed
- * here, so take caution.
- * @param[in] primary_task Pointer to iSCSI primary task
- * which finished the data transfer which
- * may NOT be NULL, so be careful.
- */
-void iscsi_task_xfer_complete_process_other(iscsi_connection *conn, iscsi_task *task, iscsi_task *primary_task)
-{
-	primary_task->des_data_xfer_pos += task->scsi_task.len;
-
-	if ( task == primary_task ) {
-		iscsi_task_response( conn, task );
-		iscsi_task_destroy( task );
-
+	if ( task == NULL )
 		return;
-	}
 
-	if ( task->scsi_task.status == ISCSI_SCSI_STATUS_GOOD )
-		primary_task->scsi_task.xfer_pos += task->scsi_task.xfer_pos;
-	else if ( primary_task->scsi_task.status == ISCSI_SCSI_STATUS_GOOD )
-		iscsi_scsi_task_status_copy( &primary_task->scsi_task, &task->scsi_task );
-
-	if ( primary_task->des_data_xfer_pos == primary_task->scsi_task.xfer_len ) {
-		if ( (primary_task->flags & ISCSI_TASK_FLAGS_R2T_ACTIVE) != 0 ) {
-			iscsi_task_response( conn, primary_task );
-			iscsi_task_xfer_del( conn, primary_task->target_xfer_tag );
-		} else {
-			iscsi_task_response( conn, task );
-		}
-	}
-
-	iscsi_task_destroy( task );
-}
-
-/**
- * @brief Callback function after iSCSI SCSI Data In response has been sent.
- *
- * This function is invoked after the iSCSI
- * SCSI Data In response has been sent to
- * the client via TCP/IP.
- *
- * @param[in] user_data Pointer to iSCSI connection which
- * was used for sending the response.
- */
-static void iscsi_connection_pdu_scsi_data_in_complete(uint8_t *user_data)
-{
-	iscsi_connection *conn = (iscsi_connection *) user_data;
-
-	iscsi_connection_handle_scsi_data_in_queued_tasks( conn );
+	free( task->scsi_task.buf );
+	free( task );
 }
 
 /**
@@ -3315,9 +386,9 @@ static void iscsi_connection_pdu_scsi_data_in_complete(uint8_t *user_data)
  * @return Next Data Sequence Number (DataSN) on success,
  * the same DataSN as passed on error.
  */
-static uint32_t iscsi_scsi_data_in_send(iscsi_connection *conn, iscsi_task *task, const uint32_t pos, const uint32_t len, const uint32_t res_cnt, const uint32_t data_sn, const int8_t flags)
+static uint32_t iscsi_scsi_data_in_send(iscsi_connection *conn, iscsi_task *task, const uint32_t pos, const uint32_t len, const uint32_t res_cnt, const uint32_t data_sn, const int8_t flags, bool immediate)
 {
-	iscsi_pdu *response_pdu = iscsi_connection_pdu_create( conn, 0U, conn->header_digest, len, conn->data_digest );
+	iscsi_pdu *response_pdu = iscsi_connection_pdu_create( conn, len );
 
 	if ( response_pdu == NULL ) {
 		logadd( LOG_ERROR, "iscsi_scsi_data_in_send: Out of memory while allocating iSCSI SCSI Data In response PDU" );
@@ -3326,7 +397,6 @@ static uint32_t iscsi_scsi_data_in_send(iscsi_connection *conn, iscsi_task *task
 	}
 
 	response_pdu->task = task;
-	task->scsi_task.ref++;
 
 	iscsi_scsi_data_in_response_packet *scsi_data_in_pkt = (iscsi_scsi_data_in_response_packet *) response_pdu->bhs_pkt;
 
@@ -3334,14 +404,13 @@ static uint32_t iscsi_scsi_data_in_send(iscsi_connection *conn, iscsi_task *task
 	scsi_data_in_pkt->flags    = (flags & ~(ISCSI_SCSI_DATA_IN_RESPONSE_FLAGS_RES_UNDERFLOW | ISCSI_SCSI_DATA_IN_RESPONSE_FLAGS_RES_OVERFLOW));
 	scsi_data_in_pkt->reserved = 0U;
 
-	iscsi_task *primary_task = ((task->parent != NULL) ? task->parent : task);
-
 	if ( (flags & ISCSI_SCSI_DATA_IN_RESPONSE_FLAGS_STATUS) != 0 ) {
 		if ( (flags & ISCSI_SCSI_DATA_IN_RESPONSE_FLAGS_FINAL) != 0 ) {
 			scsi_data_in_pkt->flags |= (flags & (ISCSI_SCSI_DATA_IN_RESPONSE_FLAGS_RES_UNDERFLOW | ISCSI_SCSI_DATA_IN_RESPONSE_FLAGS_RES_OVERFLOW));
 
-			if ( (primary_task->pdu->bhs_pkt->opcode & ISCSI_OPCODE_FLAGS_IMMEDIATE) == 0 )
+			if ( !immediate ) {
 				conn->session->max_cmd_sn++;
+			}
 
 			iscsi_put_be32( (uint8_t *) &scsi_data_in_pkt->res_cnt, res_cnt );
 		} else {
@@ -3364,15 +433,12 @@ static uint32_t iscsi_scsi_data_in_send(iscsi_connection *conn, iscsi_task *task
 	iscsi_put_be32( (uint8_t *) &scsi_data_in_pkt->max_cmd_sn, conn->session->max_cmd_sn );
 	iscsi_put_be32( (uint8_t *) &scsi_data_in_pkt->data_sn, data_sn );
 
-	if ( conn->session->err_recovery_level > 0UL )
-		primary_task->data_sn = data_sn;
-
 	const uint32_t offset = (task->scsi_task.pos + pos);
 	iscsi_put_be32( (uint8_t *) &scsi_data_in_pkt->buf_offset, offset );
 
 	memcpy( response_pdu->ds_cmd_data, (task->scsi_task.buf + pos), len );
 
-	iscsi_connection_pdu_write( conn, response_pdu, iscsi_connection_pdu_scsi_data_in_complete, (uint8_t *) conn );
+	iscsi_connection_pdu_write( conn, response_pdu );
 
 	return (data_sn + 1UL);
 }
@@ -3390,17 +456,18 @@ static uint32_t iscsi_scsi_data_in_send(iscsi_connection *conn, iscsi_task *task
  * @param[in] task Pointer to iSCSI task for handling
  * the incoming data. NULL is NOT allowed here,
  * take caution.
+ * @param immediate
  * @return 0 on successful incoming transfer handling,
  * a negative error code otherwise.
  */
-static int iscsi_task_xfer_scsi_data_in(iscsi_connection *conn, iscsi_task *task)
+static int iscsi_task_xfer_scsi_data_in(iscsi_connection *conn, iscsi_task *task, bool immediate)
 {
 	if ( task->scsi_task.status != ISCSI_SCSI_STATUS_GOOD )
 		return 0;
 
 	const uint32_t pos      = task->scsi_task.xfer_pos;
 	uint32_t xfer_len       = task->scsi_task.len;
-	const uint32_t seg_len  = conn->max_recv_ds_len;
+	const uint32_t seg_len  = conn->session->opts.MaxRecvDataSegmentLength;
 	uint32_t res_cnt        = 0UL;
 	int8_t flags            = 0;
 
@@ -3413,11 +480,10 @@ static int iscsi_task_xfer_scsi_data_in(iscsi_connection *conn, iscsi_task *task
 		flags   |= ISCSI_SCSI_DATA_IN_RESPONSE_FLAGS_RES_OVERFLOW;
 	}
 
-	iscsi_task *primary_task         = ((task->parent != NULL) ? task->parent : task);
-	uint32_t data_sn                 = primary_task->data_sn;
+	uint32_t data_sn                 = task->data_sn;
 	uint32_t max_burst_offset        = 0UL;
-	const uint32_t max_burst_len     = conn->session->max_burst_len;
-	const uint32_t data_in_seq_count = (uint32_t) (iscsi_is_pow2( max_burst_len ) ? (((xfer_len - 1UL) >> iscsi_get_log2_of_pow2( max_burst_len )) + 1UL) : (((xfer_len - 1UL) / max_burst_len) + 1UL));
+	const uint32_t max_burst_len     = conn->session->opts.MaxBurstLength;
+	const uint32_t data_in_seq_count = ((xfer_len - 1UL) / max_burst_len) + 1UL;
 	int8_t status                    = 0;
 
 	for ( uint32_t i = 0UL; i < data_in_seq_count; i++ ) {
@@ -3437,22 +503,19 @@ static int iscsi_task_xfer_scsi_data_in(iscsi_connection *conn, iscsi_task *task
 			if ( (offset + len) == seq_end ) {
 				flags |= (int8_t) ISCSI_SCSI_DATA_IN_RESPONSE_FLAGS_FINAL;
 
-				if ( (task->scsi_task.sense_data_len == 0U) && ((offset + len) == xfer_len) && (primary_task->des_data_xfer_pos == primary_task->scsi_task.xfer_len) ) {
+				if ( (task->scsi_task.sense_data_len == 0U) && ((offset + len) == xfer_len) && (task->des_data_xfer_pos == task->scsi_task.xfer_len) ) {
 					flags  |= (int8_t) ISCSI_SCSI_DATA_IN_RESPONSE_FLAGS_STATUS;
 					status |= flags;
 				}
 			}
 
-			data_sn = iscsi_scsi_data_in_send( conn, task, offset, len, res_cnt, data_sn, flags );
+			data_sn = iscsi_scsi_data_in_send( conn, task, offset, len, res_cnt, data_sn, flags, immediate );
 		}
 
 		max_burst_offset += max_burst_len;
 	}
 
-	if ( primary_task != task )
-		primary_task->scsi_task.xfer_pos += task->scsi_task.xfer_pos;
-
-	primary_task->data_sn = data_sn;
+	task->data_sn = data_sn;
 
 	return (status & ISCSI_SCSI_DATA_IN_RESPONSE_FLAGS_STATUS);
 }
@@ -3470,22 +533,20 @@ static int iscsi_task_xfer_scsi_data_in(iscsi_connection *conn, iscsi_task *task
  * response PDU from. NULL is NOT allowed
  * here, take caution.
  */
-void iscsi_task_response(iscsi_connection *conn, iscsi_task *task)
+static void iscsi_task_response(iscsi_connection *conn, iscsi_task *task, iscsi_pdu *pdu)
 {
-	iscsi_task *primary_task            = ((task->parent != NULL) ? task->parent : task);
-	iscsi_pdu *pdu                      = primary_task->pdu;
 	iscsi_scsi_cmd_packet *scsi_cmd_pkt = (iscsi_scsi_cmd_packet *) pdu->bhs_pkt;
-	const uint32_t xfer_len             = primary_task->scsi_task.xfer_len;
+	const uint32_t xfer_len             = task->scsi_task.xfer_len;
 
 	if ( (scsi_cmd_pkt->flags_task & ISCSI_SCSI_CMD_FLAGS_TASK_READ) != 0 ) {
-		const int rc = iscsi_task_xfer_scsi_data_in( conn, task );
+		const int rc = iscsi_task_xfer_scsi_data_in( conn, task, (pdu->bhs_pkt->opcode & ISCSI_OPCODE_FLAGS_IMMEDIATE) != 0 );
 
-		if ( (rc > 0) || (primary_task->des_data_xfer_pos != primary_task->scsi_task.xfer_len) )
+		if ( (rc > 0) || (task->des_data_xfer_pos != task->scsi_task.xfer_len) )
 			return;
 	}
 
-	const uint32_t ds_len   = ((task->scsi_task.sense_data_len != 0U) ? (task->scsi_task.sense_data_len + offsetof(struct iscsi_scsi_ds_cmd_data, sense_data)) : 0UL);
-	iscsi_pdu *response_pdu = iscsi_connection_pdu_create( conn, 0U, conn->header_digest, ds_len, conn->data_digest );
+	const uint32_t ds_len   = (task->scsi_task.sense_data_len != 0U) ? (task->scsi_task.sense_data_len + offsetof(struct iscsi_scsi_ds_cmd_data, sense_data)) : 0UL;
+	iscsi_pdu *response_pdu = iscsi_connection_pdu_create( conn, ds_len );
 
 	if ( response_pdu == NULL ) {
 		logadd( LOG_ERROR, "iscsi_task_response: Out of memory while allocating iSCSI SCSI response PDU" );
@@ -3507,13 +568,12 @@ void iscsi_task_response(iscsi_connection *conn, iscsi_task *task)
 	}
 
 	response_pdu->task = task;
-	task->scsi_task.ref++;
 
 	scsi_response_pkt->opcode   = ISCSI_OPCODE_SERVER_SCSI_RESPONSE;
 	scsi_response_pkt->flags    = -0x80;
 	scsi_response_pkt->response = ISCSI_SCSI_RESPONSE_CODE_OK;
 
-	const uint32_t pos = primary_task->scsi_task.xfer_pos;
+	const uint32_t pos = task->scsi_task.xfer_pos;
 
 	if ( (xfer_len != 0UL) && (task->scsi_task.status == ISCSI_SCSI_STATUS_GOOD) ) {
 		if ( pos < xfer_len ) {
@@ -3547,355 +607,28 @@ void iscsi_task_response(iscsi_connection *conn, iscsi_task *task)
 	scsi_response_pkt->exp_data_sn       = 0UL;
 	scsi_response_pkt->bidi_read_res_cnt = 0UL;
 
-	iscsi_connection_pdu_write( conn, response_pdu, NULL, NULL );
+	iscsi_connection_pdu_write( conn, response_pdu );
 }
 
 /**
- * @brief Creates and initializes an iSCSI portal group.
- *
- * Specified tag and flags are used for portal group
- * initialization.
- * @param[in] tag Tag to associate with the portal group.
- * @param[in] flags Flags to set for the portal group.
- * @return Pointer to allocated and initialized portal group
- * or NULL in case of memory
- */
-iscsi_portal_group *iscsi_portal_group_create(const uint64_t tag, const int flags)
-{
-	iscsi_portal_group *portal_group = (iscsi_portal_group *) malloc( sizeof(struct iscsi_portal_group) );
-
-	if ( portal_group == NULL ) {
-		logadd( LOG_ERROR, "iscsi_portal_group_create: Out of memory allocating iSCSI portal group structure" );
-
-		return NULL;
-	}
-
-	portal_group->portals = iscsi_hashmap_create( 0U );
-
-	if ( portal_group->portals == NULL ) {
-		logadd( LOG_ERROR, "iscsi_portal_group_create: Out of memory allocating iSCSI portal hash map" );
-
-		free( portal_group );
-
-		return NULL;
-	}
-
-	portal_group->ref_count  = 0;
-	portal_group->tag        = tag;
-	portal_group->flags      = flags;
-	portal_group->chap_group = 0L;
-
-	return portal_group;
-}
-
-/**
- * @brief iSCSI portal group destructor callback for hash map.
- *
- * Callback function for deallocation of an iSCSI
- * portal group stored in the hash map managing all
- * iSCSI portal groups.
- *
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] value Value of the key, NULL is allowed.
- * @param[in,out] user_data This argument is not used by
- * this function and should be always NULL for now, as
- * there is a possibility for future usage.
- * @return Always returns 0 as this function cannot fail.
- */
-int iscsi_portal_group_destroy_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data)
-{
-	iscsi_portal_group_destroy( (iscsi_portal_group *) value );
-
-	return 0;
-}
-
-/**
- * @brief Deallocates resources acquired by iscsi_portal_group_create.
- *
- * This function frees the associated hash map containing the
- * poptals and the structure itself.
- *
- * @param[in] portal_group Pointer to iSCSI portal group to deallocate.
- * May be NULL in which case this function does nothing.
- */
-void iscsi_portal_group_destroy(iscsi_portal_group *portal_group)
-{
-	if ( portal_group != NULL ) {
-		if ( portal_group->portals != NULL ) {
-			iscsi_hashmap_iterate( portal_group->portals, iscsi_portal_destroy_callback, NULL );
-			iscsi_hashmap_destroy( portal_group->portals );
-
-			portal_group->portals = NULL;
-		}
-
-		free( portal_group );
-	}
-}
-
-/**
- * @brief Adds an iSCSI portal to the iSCSI portal group hash map.
- *
- * This function allocates host:port of iSCSI portal for use
- * as key and sets the portal group in the portal.
- *
- * @param[in] portal_group iSCSI portal group to add portal to. May NOT be NULL,
- * so take caution.
- * @param[in] portal iSCSI portal to add to portal group. NULL is NOT
- * allowed here, so be careful.
- * @retval -1 An error occured during adding the portal,
- * usually caused by memory exhaustion
- * @retval 0 The portal has been added successfully to the
- * portal group.
- */
-int iscsi_portal_group_add_portal(iscsi_portal_group *portal_group, iscsi_portal *portal)
-{
-	uint8_t *tmp_buf = iscsi_sprintf_alloc( "%s:%s", portal->host, portal->port );
-
-	if ( tmp_buf == NULL ) {
-		logadd( LOG_ERROR, "iscsi_portal_group_add_portal: Out of memory allocating temporarily key buffer for iSCSI portal" );
-
-		return -1;
-	}
-
-	const uint key_len = (uint) (strlen( (char *) tmp_buf ) + 1U);
-	uint8_t *key       = iscsi_hashmap_key_create( tmp_buf, key_len );
-
-	free( tmp_buf );
-
-	if ( key == NULL ) {
-		logadd( LOG_ERROR, "iscsi_portal_group_add_portal: Out of memory allocating key for iSCSI portal" );
-
-		return -1;
-	}
-
-	int rc = iscsi_hashmap_put( portal_group->portals, key, key_len, (uint8_t *) portal );
-
-	if ( rc < 0 ) {
-		logadd( LOG_ERROR, "iscsi_portal_group_add_portal: Adding portal to hash map containing iSCSI portal group failed" );
-
-		iscsi_hashmap_key_destroy( key );
-
-		return rc;
-	}
-
-	portal->group = portal_group;
-
-	return 0;
-}
-
-/**
- * @brief Removes an iSCSI portal from the iSCSI portal group hash map.
- *
- * This function deallocates the hash key used
- * for storing the portal in the portal group
- * as well.
- *
- * @param[in] portal_group iSCSI portal group to remove portal from. May
- * NOT be NULL, so take caution.
- * @param[in] portal iSCSI portal to remove from the portal group.
- * NULL is NOT allowed here, so be careful.
- */
-void iscsi_portal_group_del_portal(iscsi_portal_group *portal_group, iscsi_portal *portal)
-{
-	uint8_t *tmp_buf = iscsi_sprintf_alloc( "%s:%s", portal->host, portal->port );
-
-	if ( tmp_buf == NULL ) {
-		logadd( LOG_ERROR, "iscsi_portal_group_del_portal: Out of memory allocating temporarily key buffer for iSCSI portal" );
-
-		return;
-	}
-
-	const uint key_len = (uint) (strlen( (char *) tmp_buf ) + 1U);
-	uint8_t *key       = iscsi_hashmap_key_create( tmp_buf, key_len );
-
-	free( tmp_buf );
-
-	if ( key == NULL ) {
-		logadd( LOG_ERROR, "iscsi_portal_group_del_portal: Out of memory allocating key for iSCSI portal" );
-
-		return;
-	}
-
-	if ( iscsi_hashmap_contains( portal_group->portals, key, key_len ) ) {
-		portal->group = NULL;
-
-		iscsi_hashmap_remove_free( portal_group->portals, key, key_len, iscsi_hashmap_key_destroy_callback, NULL );
-	}
-
-	iscsi_hashmap_key_destroy( key );
-}
-
-/**
- * @brief Allocates and initializes an iSCSI portal structure.
- *
- * This function makes a copy of the passed host / IP address
- * and port, but does NOT initialize the socket.
- *
- * @param[in] host Host / IP address of the portal.
- * @param[in] port Port of the portal.
- * @return Pointer to iSCSI portal structure or NULL
- * in case of an error (memory exhausted).
- */
-iscsi_portal *iscsi_portal_create(const uint8_t *host, const uint8_t *port)
-{
-	iscsi_portal *portal = (iscsi_portal *) malloc( sizeof(struct iscsi_portal) );
-
-	if ( portal == NULL ) {
-		logadd( LOG_ERROR, "iscsi_portal_create: Out of memory allocating iSCSI portal structure" );
-
-		return NULL;
-	}
-
-	portal->group = NULL;
-
-	const uint host_len = (uint) (strlen( (char *) host ) + 1U);
-
-	portal->host = (uint8_t *) malloc( host_len );
-
-	if ( portal->host == NULL ) {
-		logadd( LOG_ERROR, "iscsi_portal_create: Out of memory allocating iSCSI portal host name" );
-
-		return NULL;
-	}
-
-	memcpy( portal->host, host, host_len );
-
-	const uint port_len = (uint) (strlen( (char *) port ) + 1U);
-
-	portal->port = (uint8_t *) malloc( port_len );
-
-	if ( portal->port == NULL ) {
-		logadd( LOG_ERROR, "iscsi_portal_create: Out of memory allocating iSCSI portal port" );
-
-		return NULL;
-	}
-
-	memcpy( portal->port, port, port_len );
-
-	portal->sock = -1;
-
-	return portal;
-}
-
-/**
- * @brief iSCSI portal destructor callback for hash map.
- *
- * Callback function for deallocation of an iSCSI
- * portal stored in the iSCSI portal group hash map.
- *
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] value Value of the key, NULL is allowed.
- * @param[in,out] user_data This argument is not used by
- * this function and should be always NULL for now, as
- * there is a possibility for future usage.
- * @return Always returns 0 as this function cannot fail.
- */
-int iscsi_portal_destroy_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data)
-{
-	iscsi_portal_destroy( (iscsi_portal *) value );
-	iscsi_hashmap_key_destroy( key );
-
-	return 0;
-}
-
-/**
- * @brief Deallocates all resources acquired by iscsi_portal_create.
- *
- * This function frees the memory acquired for host / IP address
- * and port but does NOT remove it from the portal group hash map.
- *
- * @param[in] portal Pointer to iSCSI portal to be deallocated,
- * which may be NULL in which case the function does nothing.
- */
-void iscsi_portal_destroy(iscsi_portal *portal)
-{
-	if ( portal != NULL ) {
-		if ( portal->port != NULL ) {
-			free( portal->port );
-
-			portal->port = NULL;
-		}
-
-		if ( portal->host != NULL ) {
-			free( portal->host );
-
-			portal->host = NULL;
-		}
-
-		free( portal );
-	}
-}
-
-/**
- * @brief Allocates and initializes a SCSI task.
- *
- * THis function assocates the callback
- * functions to the SCSI task and sets
- * the reference count to 1.
+ * @brief Initializes a SCSI task.
  *
  * @param[in] scsi_task Pointer to SCSI task. This
  * may NOT be NULL, so be careful.
- * @param[in] xfer_complete_callback Pointer to transfer completed callback
- * function.
- * @param[in] destroy_callback Pointer to SCSI task destruction
- * callback function.
  */
-void iscsi_scsi_task_create(iscsi_scsi_task *scsi_task, iscsi_scsi_task_xfer_complete_callback xfer_complete_callback, iscsi_scsi_task_destroy_callback destroy_callback)
+static void iscsi_scsi_task_create(iscsi_scsi_task *scsi_task)
 {
-	scsi_task->node.succ              = NULL;
-	scsi_task->node.pred              = NULL;
-	scsi_task->lun                    = NULL;
-	scsi_task->target_port            = NULL;
-	scsi_task->init_port              = NULL;
 	scsi_task->cdb                    = NULL;
 	scsi_task->sense_data             = NULL;
-	scsi_task->xfer_complete_callback = xfer_complete_callback;
-	scsi_task->destroy_callback       = destroy_callback;
-	scsi_task->io_complete_callback   = NULL;
-	scsi_task->io_wait.image          = NULL;
-	scsi_task->io_wait.callback       = NULL;
-	scsi_task->io_wait.user_data      = NULL;
 	scsi_task->buf                    = NULL;
 	scsi_task->pos                    = 0UL;
 	scsi_task->len                    = 0UL;
 	scsi_task->id                     = 0ULL;
 	scsi_task->flags                  = 0;
-	scsi_task->ref                    = 1UL;
 	scsi_task->xfer_pos               = 0UL;
 	scsi_task->xfer_len               = 0UL;
 	scsi_task->sense_data_len         = 0U;
 	scsi_task->status                 = ISCSI_SCSI_STATUS_GOOD;
-	scsi_task->task_mgmt_func         = ISCSI_TASK_MGMT_FUNC_REQ_FUNC_ABORT_TASK;
-	scsi_task->task_mgmt_response     = ISCSI_TASK_MGMT_FUNC_RESPONSE_FUNC_COMPLETE;
-}
-
-/**
- * @brief Deallocates all resources acquired iscsi_scsi_task_create.
- *
- * This function also calls the task destruction
- * callback function if the reference count
- * becomes zero.
- *
- * @param[in] scsi_task Pointer to iSCSI SCSI task to deallocate.
- * This may be NULL in which case nothing
- * happens.
- */
-void iscsi_scsi_task_destroy(iscsi_scsi_task *scsi_task)
-{
-	if ( (scsi_task != NULL) && (--scsi_task->ref == 0UL) ) {
-		if ( scsi_task->buf != NULL ) {
-			if ( (scsi_task->flags & ISCSI_SCSI_TASK_FLAGS_XFER_WRITE) == 0 )
-				free( scsi_task->buf );
-
-			scsi_task->buf = NULL;
-		}
-
-		scsi_task->destroy_callback( scsi_task );
-	}
 }
 
 /**
@@ -3907,20 +640,17 @@ void iscsi_scsi_task_destroy(iscsi_scsi_task *scsi_task)
  * @param[in] scsi_task Pointer to iSCSI SCSI task which finished
  * the data transfer and may NOT be NULL,
  * so be careful.
+ * @param pdu
  */
-void iscsi_scsi_task_xfer_complete(iscsi_scsi_task *scsi_task)
+static void iscsi_scsi_task_xfer_complete(iscsi_scsi_task *scsi_task, iscsi_pdu *pdu)
 {
-	iscsi_task *task = ISCSI_CONTAINER(iscsi_task, scsi_task, scsi_task);
-
-	task->flags &= ~ISCSI_TASK_FLAGS_QUEUED;
-
-	iscsi_task *primary_task = ((task->parent != NULL) ? task->parent : task);
+	iscsi_task *task = container_of( scsi_task, iscsi_task, scsi_task );
 	iscsi_connection *conn   = task->conn;
 
-	if ( (((iscsi_scsi_cmd_packet *) primary_task->pdu->bhs_pkt)->flags_task & ISCSI_SCSI_CMD_FLAGS_TASK_READ) != 0 )
-		iscsi_task_xfer_complete_process_read( conn, task, primary_task );
-	else
-		iscsi_task_xfer_complete_process_other( conn, task, primary_task );
+	task->des_data_xfer_pos += task->scsi_task.len;
+
+	iscsi_task_response( conn, task, pdu );
+	iscsi_task_destroy( task );
 }
 
 /**
@@ -3939,7 +669,7 @@ void iscsi_scsi_task_xfer_complete(iscsi_scsi_task *scsi_task)
  * @param[in] asc Additional Sense Code (ASC).
  * @param[in] ascq Additional Sense Code Qualifier (ASCQ).
  */
-void iscsi_scsi_task_sense_data_build(iscsi_scsi_task *scsi_task, const uint8_t sense_key, const uint8_t asc, const uint8_t ascq)
+static void iscsi_scsi_task_sense_data_build(iscsi_scsi_task *scsi_task, const uint8_t sense_key, const uint8_t asc, const uint8_t ascq)
 {
 	iscsi_scsi_sense_data_check_cond_packet *sense_data = (iscsi_scsi_sense_data_check_cond_packet *) scsi_task->sense_data;
 
@@ -3964,7 +694,7 @@ void iscsi_scsi_task_sense_data_build(iscsi_scsi_task *scsi_task, const uint8_t
 	sense_data->cmd_spec_info        = 0UL; // Zero does not require endianess conversion
 	sense_data->asc                  = asc;
 	sense_data->ascq                 = ascq;
-	sense_data->field_rep_unit_code  = 0U;
+	sense_data->field_rep_unit_code  = 0UL;
 	sense_data->sense_key_spec_flags = 0U;
 	sense_data->sense_key_spec       = 0U; // Zero does not require endianess conversion
 
@@ -3996,44 +726,6 @@ static void iscsi_scsi_task_status_set(iscsi_scsi_task *scsi_task, const uint8_t
 }
 
 /**
- * @brief Copies iSCSI SCSI task sense data and status code.
- *
- * This function allocates, if necessary, a
- * SCSI sense data buffer and copies it over
- * from source or deallocates the sense data
- * buffer in case the source has no sense
- * data.
- *
- * @param[in] dst_scsi_task Pointer to iSCSI SCSI task to copy to.
- * May NOT be NULL, so be careful.
- * @param[in] src_scsi_task Pointer to iSCSI SCSI task to copy from.
- * NULL is NOT allowed here, take caution.
- * @return 0 on successful copy operation, a negative
- * error code otherwise.
- */
-int iscsi_scsi_task_status_copy(iscsi_scsi_task *dst_scsi_task, const iscsi_scsi_task *src_scsi_task)
-{
-	if ( dst_scsi_task->sense_data != NULL )
-		free( dst_scsi_task->sense_data );
-
-	if ( src_scsi_task->sense_data != NULL ) {
-		dst_scsi_task->sense_data = malloc( src_scsi_task->sense_data_len );
-
-		if ( dst_scsi_task == NULL )
-			return -1;
-
-		memcpy( dst_scsi_task->sense_data, src_scsi_task->sense_data, src_scsi_task->sense_data_len );
-	} else {
-		dst_scsi_task->sense_data = NULL;
-	}
-
-	dst_scsi_task->sense_data_len = src_scsi_task->sense_data_len;
-	dst_scsi_task->status         = src_scsi_task->status;
-
-	return 0;
-}
-
-/**
  * @brief Processes a iSCSI SCSI task with no LUN identifier.
  *
  * This function only generates a SCSI response
@@ -4045,7 +737,7 @@ int iscsi_scsi_task_status_copy(iscsi_scsi_task *dst_scsi_task, const iscsi_scsi
  * the task with no LUN identifier for. May NOT
  * be NULL, so be careful.
  */
-void iscsi_scsi_task_lun_process_none(iscsi_scsi_task *scsi_task)
+static void iscsi_scsi_task_lun_process_none(iscsi_scsi_task *scsi_task)
 {
 	iscsi_scsi_std_inquiry_data_packet std_inquiry_data_pkt;
 	iscsi_scsi_cdb_inquiry *cdb = (iscsi_scsi_cdb_inquiry *) scsi_task->cdb;
@@ -4077,172 +769,6 @@ void iscsi_scsi_task_lun_process_none(iscsi_scsi_task *scsi_task)
 }
 
 /**
- * @brief Processes a iSCSI SCSI aborted task.
- *
- * This function will generate a SCSI error as
- * specified by the SCSI standard.
- *
- * @param[in] scsi_task Pointer to iSCSI SCSI task to process
- * the task to be aborted. May NOT be NULL, so
- * be careful.
- */
-void iscsi_scsi_task_lun_process_abort(iscsi_scsi_task *scsi_task)
-{
-	iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_ABORTED_COMMAND, ISCSI_SCSI_ASC_NO_ADDITIONAL_SENSE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-}
-
-/**
- * @brief Allocates and initializes an iSCSI LUN structure for linkage with a DNBD3 image.
- *
- * This function does not set the DNBD3
- * image itself.
- *
- * @param[in] id LUN identifier.
- * @return Pointer to ISCSI device LUN or NULL in case
- * of an error (memory exhaustion).
- */
-iscsi_scsi_lun *iscsi_scsi_lun_create(const int lun_id)
-{
-	iscsi_scsi_lun *lun = (iscsi_scsi_lun *) malloc( sizeof(struct iscsi_scsi_lun) );
-
-	if ( lun == NULL ) {
-		logadd( LOG_ERROR, "iscsi_scsi_lun_create: Out of memory allocating iSCSI device LUN" );
-
-		return NULL;
-	}
-
-	iscsi_list_create( &lun->tasks );
-
-	if ( pthread_mutex_init( &lun->tasks_mutex, NULL ) != 0 ) {
-		logadd( LOG_ERROR, "iscsi_scsi_lun_create: Error while initializing tasks mutex for iSCSI device LUN" );
-
-		return NULL;
-	}
-
-	iscsi_list_create( &lun->tasks_pending );
-
-	if ( pthread_mutex_init( &lun->tasks_pending_mutex, NULL ) != 0 ) {
-		logadd( LOG_ERROR, "iscsi_scsi_lun_create: Error while initializing pendings tasks mutex for iSCSI device LUN" );
-
-		pthread_mutex_destroy( &lun->tasks_mutex );
-
-		return NULL;
-	}
-
-	iscsi_list_create( &lun->tasks_mgmt );
-
-	if ( pthread_mutex_init( &lun->tasks_mgmt_mutex, NULL ) != 0 ) {
-		logadd( LOG_ERROR, "iscsi_scsi_lun_create: Error while initializing management tasks mutex for iSCSI device LUN" );
-
-		pthread_mutex_destroy( &lun->tasks_pending_mutex );
-		pthread_mutex_destroy( &lun->tasks_mutex );
-
-		return NULL;
-	}
-
-	iscsi_list_create( &lun->tasks_mgmt_pending );
-
-	if ( pthread_mutex_init( &lun->tasks_mgmt_pending_mutex, NULL ) != 0 ) {
-		logadd( LOG_ERROR, "iscsi_scsi_lun_create: Error while initializing management pending tasks mutex for iSCSI device LUN" );
-
-		pthread_mutex_destroy( &lun->tasks_mgmt_mutex );
-		pthread_mutex_destroy( &lun->tasks_pending_mutex );
-		pthread_mutex_destroy( &lun->tasks_mutex );
-
-		return NULL;
-	}
-
-	lun->pr_regs = iscsi_hashmap_create( 0U );
-
-	if ( lun->pr_regs == NULL ) {
-		logadd( LOG_ERROR, "iscsi_scsi_lun_create: Out of memory allocating iSCSI device LUN Persistent Reservation (PR) registrant for I_T nexus hash map" );
-
-		pthread_mutex_destroy( &lun->tasks_mgmt_pending_mutex );
-		pthread_mutex_destroy( &lun->tasks_mgmt_mutex );
-		pthread_mutex_destroy( &lun->tasks_pending_mutex );
-		pthread_mutex_destroy( &lun->tasks_mutex );
-		free( lun );
-
-		return NULL;
-	}
-
-	lun->pr_reservation.holder = NULL;
-	lun->pr_reservation.cr_key = 0ULL;
-	lun->pr_reservation.type   = 0;
-	lun->pr_reservation.flags  = 0L;
-
-	lun->pr_scsi2_holder.target_port        = NULL;
-	lun->pr_scsi2_holder.target_name        = NULL;
-	lun->pr_scsi2_holder.init_port          = NULL;
-	lun->pr_scsi2_holder.init_name          = NULL;
-	lun->pr_scsi2_holder.transport_id       = NULL;
-	lun->pr_scsi2_holder.r_key              = 0ULL;
-	lun->pr_scsi2_holder.rel_target_port_id = 0U;
-	lun->pr_scsi2_holder.transport_id_len   = 0U;
-
-	lun->device = NULL;
-	lun->image  = NULL;
-	lun->id     = lun_id;
-	lun->flags  = 0;
-	lun->pr_gen = 0UL;
-
-	return lun;
-}
-
-/**
- * @brief iSCSI SCSI LUN destructor callback for hash map.
- *
- * Callback function for deallocation of an iSCSI
- * SCSI LUN stored in the iSCSI device hash map.
- *
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] value Value of the key, NULL is allowed.
- * @param[in,out] user_data This argument is not used by
- * this function and should be always NULL for now, as
- * there is a possibility for future usage.
- * @return Always returns 0 as this function cannot fail.
- */
-int iscsi_scsi_lun_destroy_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data)
-{
-	iscsi_scsi_lun_destroy( (iscsi_scsi_lun *) value );
-	iscsi_hashmap_key_destroy( key );
-
-	return 0;
-}
-
-/**
- * @brief Deallocates all resources acquired by iscsi_scsi_lun_create.
- *
- * This function does not deallocate the
- * associated DNBD3 image and therefore
- * just deallocates the associated SCSI
- * tasks.
- *
- * @param[in] lun Pointer to iSCSI device LUN to be freed.
- * May be NULL in which case this function
- * does nothing at all.
- */
-void iscsi_scsi_lun_destroy(iscsi_scsi_lun *lun)
-{
-	if ( lun != NULL ) {
-		if ( lun->pr_regs != NULL ) {
-			// iscsi_hashmap_iterate( lun->pr_regs, iscsi_scsi_pr_registrant_destroy_callback, NULL );
-			iscsi_hashmap_destroy( lun->pr_regs );
-
-			lun->pr_regs = NULL;
-		}
-
-		pthread_mutex_destroy( &lun->tasks_mgmt_pending_mutex );
-		pthread_mutex_destroy( &lun->tasks_mgmt_mutex );
-		pthread_mutex_destroy( &lun->tasks_pending_mutex );
-		pthread_mutex_destroy( &lun->tasks_mutex );
-		free( lun );
-	}
-}
-
-/**
  * @brief Converts an internal representation of a LUN identifier to an iSCSI LUN required for packet data.
  *
  * This function needs to be called prior
@@ -4255,7 +781,7 @@ void iscsi_scsi_lun_destroy(iscsi_scsi_lun *lun)
  * @return iSCSI packet data representation of LUN or
  * 0 in case of an invalid LUN.
  */
-uint64_t iscsi_scsi_lun_get_from_scsi(const int lun_id)
+static uint64_t iscsi_scsi_lun_get_from_scsi(const int lun_id)
 {
 	uint64_t iscsi_scsi_lun;
 
@@ -4284,7 +810,7 @@ uint64_t iscsi_scsi_lun_get_from_scsi(const int lun_id)
  * packet data LUN or 0xFFFF in case of
  * an error.
  */
-int iscsi_scsi_lun_get_from_iscsi(const uint64_t lun)
+static int iscsi_scsi_lun_get_from_iscsi(const uint64_t lun)
 {
 	int lun_id = (int) (lun >> 62ULL) & 0x03;
 
@@ -4299,75 +825,6 @@ int iscsi_scsi_lun_get_from_iscsi(const uint64_t lun)
 }
 
 /**
- * @brief Appends an iSCSI SCSI task to a iSCSI SCSI LUN pending tasks doubly linked list.
- *
- * This function cannot fail.
- *
- * @param[in] lun Pointer to iSCSI SCSI LUN to append the
- * task to, may NOT be NULL, so be careful.
- * @param[in] scsi_task Pointer to iSCSI SCSI task to be
- * appended. NULL is NOT an allowed value, so take
- * caution.
- */
-void iscsi_scsi_lun_task_append(iscsi_scsi_lun *lun, iscsi_scsi_task *scsi_task)
-{
-	iscsi_list_enqueue( &lun->tasks_pending, &scsi_task->node );
-}
-
-/**
- * @brief Executes all iSCSI SCSI pending tasks assigned to a iSCSI SCSI LUN.
- *
- * This function also removes the pending tasks
- * from the hash map of the SCSI LUN.
- *
- * @param[in] lun Pointer to ISCSI SCSI LUN of which the
- * pending tasks should be executed and may NOT
- * be NULL, so be careful.
- */
-void iscsi_scsi_lun_tasks_exec(iscsi_scsi_lun *lun)
-{
-	while ( !iscsi_list_empty( &lun->tasks_pending ) ) {
-		iscsi_scsi_task *scsi_task = (iscsi_scsi_task *) iscsi_list_peek( &lun->tasks_pending );
-
-		iscsi_list_remove( &scsi_task->node );
-		pthread_mutex_unlock( &lun->tasks_pending_mutex );
-		iscsi_scsi_lun_task_run( lun, scsi_task );
-		pthread_mutex_lock( &lun->tasks_pending_mutex );
-	}
-}
-
-/**
- * @brief Checks whether the iSCSI SCSI task requires unit attention.
- *
- * This function parses the SCSI opcode of the
- * SCSI Command Descriptor Block (CDB).
- *
- * @param[in] scsi_task Pointer to iSCSI SCSI task to check
- * unit attention for which may NOT be NULL,
- * so be careful.
- * @retval true Unit attention is required.
- * @retval false Unit attention is NOT required.
- */
-static bool iscsi_scsi_lun_handle_unit_attention(iscsi_scsi_task *scsi_task)
-{
-	switch ( scsi_task->cdb->opcode ) {
-		case ISCSI_SCSI_OPCODE_INQUIRY :
-		case ISCSI_SCSI_OPCODE_REPORTLUNS :
-		case ISCSI_SCSI_OPCODE_REQUESTSENSE : {
-			return false;
-
-			break;
-		}
-		default : {
-			return true;
-
-			break;
-		}
-
-	}
-}
-
-/**
  * @brief Runs an iSCSI SCSI task for a specified iSCSI SCSI LUN.
  *
  * This function moves the task back to the
@@ -4376,681 +833,31 @@ static bool iscsi_scsi_lun_handle_unit_attention(iscsi_scsi_task *scsi_task)
  * Errors are nandled according to the SCSI
  * standard.
  *
- * @param[in] lun Pointer to iSCSI SCSI LUN of which the
- * task should be run and may NOT be NULL,
- * so be careful.
  * @param[in] scsi_task Pointer to iSCSI SCSI task to be run.
  * NULL is NOT valid here, take caution.
+ * @param pdu
  */
-void iscsi_scsi_lun_task_run(iscsi_scsi_lun *lun, iscsi_scsi_task *scsi_task)
+static void iscsi_scsi_lun_task_run( iscsi_scsi_task *scsi_task, iscsi_pdu *pdu)
 {
 	int rc;
 
-	pthread_mutex_lock( &lun->tasks_mutex );
-	iscsi_list_enqueue( &lun->tasks, &scsi_task->node );
-	pthread_mutex_unlock( &lun->tasks_mutex );
-
 	scsi_task->status = ISCSI_SCSI_STATUS_GOOD;
 
-	if ( (lun->flags & ISCSI_SCSI_LUN_FLAGS_REMOVED) != 0 ) {
-		iscsi_scsi_task_lun_process_abort( scsi_task );
-
-		rc = ISCSI_SCSI_TASK_RUN_COMPLETE;
-	} else if ( ((lun->flags & ISCSI_SCSI_LUN_FLAGS_RESIZING) != 0) && iscsi_scsi_lun_handle_unit_attention( scsi_task ) ) {
-		iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_UNIT_ATTENTION, ISCSI_SCSI_ASC_CAPACITY_DATA_HAS_CHANGED, ISCSI_SCSI_ASCQ_CAPACITY_DATA_HAS_CHANGED );
-
-		lun->flags &= ~ISCSI_SCSI_LUN_FLAGS_RESIZING;
+	rc = iscsi_scsi_emu_block_process( scsi_task );
 
-		rc = ISCSI_SCSI_TASK_RUN_COMPLETE;
-	} else {
-		if ( (lun->pr_reservation.flags & ISCSI_SCSI_PR_RESERVATION_FLAGS_SPC2_RESERVE) != 0 )
-			rc = iscsi_scsi_pr_check_scsi2( scsi_task );
-		else
-			rc = iscsi_scsi_pr_check( scsi_task );
+	if ( rc == ISCSI_SCSI_TASK_RUN_UNKNOWN ) {
+		rc = iscsi_scsi_emu_primary_process( scsi_task );
 
-		if ( rc < 0 )
+		if ( rc == ISCSI_SCSI_TASK_RUN_UNKNOWN ) {
+			iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_ILLEGAL_REQ, ISCSI_SCSI_ASC_INVALID_COMMAND_OPERATION_CODE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
+			// TODO: Free task
 			rc = ISCSI_SCSI_TASK_RUN_COMPLETE;
-		else
-			rc = iscsi_scsi_emu_exec( scsi_task );
-	}
-
-	if ( rc == ISCSI_SCSI_TASK_RUN_COMPLETE )
-		iscsi_scsi_lun_task_complete( lun, scsi_task );
-}
-
-/**
- * @brief Handles iSCSI SCSI task completition.
- *
- * This function removes the completed task from
- * the iSCSI SCSI LUN task doubly linked list
- * and calls the transfer finished callback
- * function.
- *
- * @param[in] lun Pointer to iSCSI SCSI LUN to remove the task
- * from.
- * @param[in] scsi_task Pointer to iSCSI SCSI task to be removed
- * and to invoke the transfer finished callback
- * of and may NOT be NULL, so be careful.
- */
-void iscsi_scsi_lun_task_complete(iscsi_scsi_lun *lun, iscsi_scsi_task *scsi_task)
-{
-	if ( lun != NULL )
-		iscsi_list_remove( &scsi_task->node );
-
-	scsi_task->xfer_complete_callback( scsi_task );
-}
-
-/**
- * @brief Appends iSCSI SCSI task to pending tasks doubly linked list and / or runs it directly.
- *
- * This function checks whether there are pending
- * task management pending tasks to be executed
- * first.\n
- * If there are pending tasks enqueued, they will
- * be executed prior this new task.\n
- * If this is the only one task, it will be
- * executed immediately.
- *
- * @param[in] lun Pointer to iSCSI SCSI LUN which should be
- * checked for pending tasks prior execution. May
- * NOT be NULL, so be careful.
- * @param[in] scsi_task Pointer to iSCSI SCSI task to either be
- * enqueued and run or to be run directly.
- */
-void iscsi_scsi_lun_task_exec(iscsi_scsi_lun *lun, iscsi_scsi_task *scsi_task)
-{
-	pthread_mutex_lock( &lun->tasks_mgmt_pending_mutex );
-
-	if ( !iscsi_list_empty( &lun->tasks_mgmt_pending ) ) {
-		pthread_mutex_unlock( &lun->tasks_mgmt_pending_mutex );
-		pthread_mutex_lock( &lun->tasks_pending_mutex );
-		iscsi_scsi_lun_task_append( lun, scsi_task );
-		pthread_mutex_unlock( &lun->tasks_pending_mutex );
-
-		return;
-	}
-
-	pthread_mutex_unlock( &lun->tasks_mgmt_pending_mutex );
-	pthread_mutex_lock( &lun->tasks_pending_mutex );
-
-	if ( !iscsi_list_empty( &lun->tasks_pending ) ) {
-		iscsi_scsi_lun_task_append( lun, scsi_task );
-		iscsi_scsi_lun_tasks_exec( lun );
-		pthread_mutex_unlock( &lun->tasks_pending_mutex );
-
-		return;
-	}
-
-	pthread_mutex_unlock( &lun->tasks_pending_mutex );
-
-	iscsi_scsi_lun_task_run( lun, scsi_task );
-}
-
-/**
- * @brief Checks if iSCSI SCSI Persistent Reservation (PR) SCSI-2 I_T nexus is holder.
- *
- * This function compares the target and
- * initiator name with the registrant.
- *
- * @param[in] lun Pointer to iSCSI SCSI LUN to be
- * checked, may NOT be NULL, so be careful.
- * @param[in] target_port Pointer to iSCSI target port to
- * check for.
- * @param[in] init_port Pointer to iSCSI initiator port to
- * check for.
- * @retval true The iSCSI SCSI Persistent Reservation
- * (PR) SCSI-2 I_T nexus is actually the holder.
- * @retval false The iSCSI SCSI Persistent Reservation
- * (PR) SCSI-2 I_T nexus is NOT the holder.
- */
-static inline bool iscsi_scsi_pr_check_scsi2_it_nexus_is_holder(const iscsi_scsi_lun *lun, const iscsi_port *target_port, const iscsi_port *init_port)
-{
-	const iscsi_scsi_pr_registrant *reg = lun->pr_reservation.holder;
-
-	return ((reg->target_port == target_port) && (reg->init_port == init_port));
-}
-
-/**
- * @brief Checks the iSCSI SCSI Persistent Reservation (PR) SCSI-2 reserve of an iSCSI SCSI task.
- *
- * This function also sets the SCSI error
- * code if the check fails.
- *
- * @param[in] scsi_task Pointer to iSCSI SCSI task to be
- * checked for and may NOT be NULL, so
- * be careful.
- * @return 0 on successful check, a negative
- * error code otherwise.
- */
-int iscsi_scsi_pr_check_scsi2(iscsi_scsi_task *scsi_task)
-{
-	const iscsi_scsi_lun *lun = scsi_task->lun;
-
-	switch ( scsi_task->cdb->opcode ) {
-		case ISCSI_SCSI_OPCODE_INQUIRY :
-		case ISCSI_SCSI_OPCODE_RELEASE6 :
-		case ISCSI_SCSI_OPCODE_RELEASE10 : {
-			return ISCSI_SCSI_TASK_RUN_COMPLETE;
-
-			break;
-		}
-		default : {
-			break;
 		}
 	}
 
-	if ( (lun->pr_reservation.holder == NULL) || iscsi_scsi_pr_check_scsi2_it_nexus_is_holder( lun, scsi_task->target_port, scsi_task->init_port ) )
-		return ISCSI_SCSI_TASK_RUN_COMPLETE;
-
-	iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_RESERVATION_CONFLICT, ISCSI_SCSI_SENSE_KEY_NO_SENSE, ISCSI_SCSI_ASC_NO_ADDITIONAL_SENSE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-	return ISCSI_SCSI_TASK_RUN_UNKNOWN;
-}
-
-/**
- * @brief Finds an iSCSI SCSI Persistent Reservation (PR) registrant by target and initiator port.
- *
- * Callback function for each element while iterating
- * through the iSCSI SCSI LUN Persistent Reservation
- * (PR) registrants hash map.
- *
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] value Value of the key, NULL creates an
- * empty key assignment.
- * @param[in,out] user_data Pointer to a data structure
- * containing the iSCSI SCSI Persistent Reservation
- * (PR) registrant and the target, as well as the
- * initiator port to be searched for and may NOT be
- * NULL, so be careful.
- * @retval -1 The registrant has been found and stored
- * in the result structure. Therefore, no further
- * searching is needed.
- * @retval 0 The registrant has not been found yet.
- */
-int iscsi_scsi_pr_registrant_get_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data)
-{
-	iscsi_scsi_pr_registrant_get_reg *reg_find = (iscsi_scsi_pr_registrant_get_reg *) user_data;
-	iscsi_scsi_pr_registrant *reg = (iscsi_scsi_pr_registrant *) value;
-
-	if ( (reg_find->target_port != reg->target_port) || (reg_find->init_port != reg->init_port) )
-		return 0;
-
-	reg_find->reg = reg;
-
-	return -1;
-}
-
-/**
- * @brief Searches an iSCSI SCSI Persistent Reservation (PR) registrant by target and initiator port.
- *
- * This function searches for an iSCSI SCSI Persistent
- * Reservation (PR) registrant by iterating through
- * the iSCSI SCSI LUN Persistent Reservation (PR)
- * registrants hash map.
- *
- * @param[in] lun Pointer to iSCSI SCSI LUN to
- * search in the Persistent Reservation (PR)
- * registrants hash map. May NOT be NULL, so be
- * careful.
- * @param[in] target_port Pointer to iSCSI target port to
- * search for.
- * @param[in] init_port Pointer to iSCSI initiator port to
- * search for.
- * @return Pointer to found iSCSI SCSI Persistent
- * Reservation (PR) registrant or NULL in case no
- * registrant has a matching target and Initiator
- * port.
- */
-static iscsi_scsi_pr_registrant *iscsi_scsi_pr_registrant_get(const iscsi_scsi_lun *lun, iscsi_port *target_port, iscsi_port *init_port)
-{
-	iscsi_scsi_pr_registrant_get_reg reg_find = {NULL, target_port, init_port};
-
-	iscsi_hashmap_iterate( lun->pr_regs, iscsi_scsi_pr_registrant_get_callback, (uint8_t *) &reg_find );
-
-	return reg_find.reg;
-}
-
-/**
- * @brief Checks whether iSCSI SCSI Persistent Reservation (PR) reservation type is all registrants or not.
- *
- * This function checks both if write exclusive and
- * exclusive access types.
- *
- * @param[in] lun Pointer to iSCSI SCSI LUN to
- * check the Persistent Reservation (PR)
- * reservation's type. May NOT be NULL, so be
- * careful.
- * @retval true The iSCSI SCSI Persistent Reservation (PR)
- * reservation type is set to all registrants.
- * @retval false The iSCSI SCSI Persistent Reservation (PR)
- * reservation type is NOT set to all registrants.
- */
-static inline bool iscsi_scsi_pr_check_is_all_type(const iscsi_scsi_lun *lun)
-{
-	return ((lun->pr_reservation.type == ISCSI_SCSI_PR_RESERVATION_TYPE_WRITE_EXCLUSIVE_ALL_REGS) || (lun->pr_reservation.type == ISCSI_SCSI_PR_RESERVATION_TYPE_EXCLUSIVE_ACCESS_ALL_REGS));
-}
-
-/**
- * @brief Checks whether iSCSI SCSI Persistent Reservation (PR) reservation holder is the specified registrant or not.
- *
- * This function also checks if reservation type is
- * all registrants or not.
- *
- * @param[in] lun Pointer to iSCSI SCSI LUN to
- * check the Persistent Reservation (PR)
- * reservation holder for. May NOT be NULL, so be
- * careful.
- * @param[in] reg Pointer to iSCSI SCSI Persistent
- * Reservation (PR) registrant to check for.
- * @retval true The iSCSI SCSI Persistent Reservation (PR)
- * reservation holder matches the registrant.
- * @retval false The iSCSI SCSI Persistent Reservation (PR)
- * reservation holder does NOT match the registrant.
- */
-static inline bool iscsi_scsi_pr_check_registrant_is_holder(const iscsi_scsi_lun *lun, const iscsi_scsi_pr_registrant *reg)
-{
-	return (((reg != NULL) && iscsi_scsi_pr_check_is_all_type( lun )) || (lun->pr_reservation.holder == reg));
-}
-
-/**
- * @brief Checks the iSCSI SCSI Persistent Reservation (PR) of an iSCSI SCSI task.
- *
- * This function also sets the SCSI error
- * code if the check fails.
- *
- * @param[in] scsi_task Pointer to iSCSI SCSI task to be
- * checked for and may NOT be NULL, so
- * be careful.
- * @return 0 on successful check, a negative
- * error code otherwise.
- */
-int iscsi_scsi_pr_check(iscsi_scsi_task *scsi_task)
-{
-	const iscsi_scsi_lun *lun           = scsi_task->lun;
-	const iscsi_scsi_pr_registrant *reg = iscsi_scsi_pr_registrant_get( lun, scsi_task->target_port, scsi_task->init_port );
-
-	if ( (reg == NULL) || ((reg->target_port == scsi_task->target_port) && (reg->init_port == scsi_task->init_port)) )
-		return ISCSI_SCSI_TASK_RUN_COMPLETE;
-
-	const iscsi_scsi_cdb *cdb = (iscsi_scsi_cdb *) scsi_task->cdb;
-	bool dma_to_device = false;
-
-	switch ( cdb->opcode ) {
-		case ISCSI_SCSI_OPCODE_INQUIRY :
-		case ISCSI_SCSI_OPCODE_REPORTLUNS :
-		case ISCSI_SCSI_OPCODE_REQUESTSENSE :
-		case ISCSI_SCSI_OPCODE_LOGSENSE :
-		case ISCSI_SCSI_OPCODE_TESTUNITREADY :
-		case ISCSI_SCSI_OPCODE_STARTSTOPUNIT :
-		case ISCSI_SCSI_OPCODE_READCAPACITY10 :
-		case ISCSI_SCSI_OPCODE_PERSISTENT_RESERVE_IN :
-		case ISCSI_SCSI_OPCODE_SERVICE_ACTION_IN_16 :
-		case ISCSI_SCSI_OPCODE_RESERVE6 :
-		case ISCSI_SCSI_OPCODE_RESERVE10 :
-		case ISCSI_SCSI_OPCODE_RELEASE6 :
-		case ISCSI_SCSI_OPCODE_RELEASE10 : {
-			return ISCSI_SCSI_TASK_RUN_COMPLETE;
-
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_MODESELECT6 :
-		case ISCSI_SCSI_OPCODE_MODESELECT10 :
-		case ISCSI_SCSI_OPCODE_MODESENSE6 :
-		case ISCSI_SCSI_OPCODE_MODESENSE10 :
-		case ISCSI_SCSI_OPCODE_LOGSELECT : {
-			if ( reg == NULL ) {
-				iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_RESERVATION_CONFLICT, ISCSI_SCSI_SENSE_KEY_NO_SENSE, ISCSI_SCSI_ASC_NO_ADDITIONAL_SENSE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-				return ISCSI_SCSI_TASK_RUN_UNKNOWN;
-			}
-
-			return ISCSI_SCSI_TASK_RUN_COMPLETE;
-
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_PERSISTENT_RESERVE_OUT : {
-			const iscsi_scsi_cdb_pr_reserve_out *cdb_pr_reserve_out = (iscsi_scsi_cdb_pr_reserve_out *) cdb;
-			const uint8_t action = ISCSI_SCSI_CDB_PR_RESERVE_OUT_GET_ACTION(cdb_pr_reserve_out->action);
-
-			switch ( action ) {
-				case ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_REGISTER :
-				case ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_REGISTER_IGNORE_EXIST_KEY : {
-					return ISCSI_SCSI_TASK_RUN_COMPLETE;
-
-					break;
-				}
-				case ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_RELEASE :
-				case ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_CLEAR :
-				case ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_PREEMPT :
-				case ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_PREEMPT_ABORT : {
-					if ( reg == NULL ) {
-						iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_RESERVATION_CONFLICT, ISCSI_SCSI_SENSE_KEY_NO_SENSE, ISCSI_SCSI_ASC_NO_ADDITIONAL_SENSE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-						return ISCSI_SCSI_TASK_RUN_UNKNOWN;
-					}
-
-					return ISCSI_SCSI_TASK_RUN_COMPLETE;
-
-					break;
-				}
-				default : {
-					iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_RESERVATION_CONFLICT, ISCSI_SCSI_SENSE_KEY_NO_SENSE, ISCSI_SCSI_ASC_NO_ADDITIONAL_SENSE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-					return ISCSI_SCSI_TASK_RUN_UNKNOWN;
-
-					break;
-
-				}
-			}
-
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_READ6 :
-		case ISCSI_SCSI_OPCODE_READ10 :
-		case ISCSI_SCSI_OPCODE_READ12 :
-		case ISCSI_SCSI_OPCODE_READ16 : {
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_WRITE6 :
-		case ISCSI_SCSI_OPCODE_WRITE10 :
-		case ISCSI_SCSI_OPCODE_WRITE12 :
-		case ISCSI_SCSI_OPCODE_WRITE16 :
-		case ISCSI_SCSI_OPCODE_UNMAP :
-		case ISCSI_SCSI_OPCODE_SYNCHRONIZECACHE10 :
-		case ISCSI_SCSI_OPCODE_SYNCHRONIZECACHE16 : {
-			dma_to_device = true;
-
-			break;
-		}
-		default : {
-			iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_RESERVATION_CONFLICT, ISCSI_SCSI_SENSE_KEY_NO_SENSE, ISCSI_SCSI_ASC_NO_ADDITIONAL_SENSE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-			return ISCSI_SCSI_TASK_RUN_UNKNOWN;
-
-			break;
-		}
+	if ( rc == ISCSI_SCSI_TASK_RUN_COMPLETE ) {
+		iscsi_scsi_task_xfer_complete( scsi_task, pdu );
 	}
-
-	switch ( lun->pr_reservation.type ) {
-		case ISCSI_SCSI_PR_RESERVATION_TYPE_WRITE_EXCLUSIVE : {
-			if ( dma_to_device ) {
-				iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_RESERVATION_CONFLICT, ISCSI_SCSI_SENSE_KEY_NO_SENSE, ISCSI_SCSI_ASC_NO_ADDITIONAL_SENSE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-				return ISCSI_SCSI_TASK_RUN_UNKNOWN;
-			}
-
-			break;
-		}
-		case ISCSI_SCSI_PR_RESERVATION_TYPE_EXCLUSIVE_ACCESS : {
-			iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_RESERVATION_CONFLICT, ISCSI_SCSI_SENSE_KEY_NO_SENSE, ISCSI_SCSI_ASC_NO_ADDITIONAL_SENSE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-			return ISCSI_SCSI_TASK_RUN_UNKNOWN;
-
-			break;
-		}
-		case ISCSI_SCSI_PR_RESERVATION_TYPE_WRITE_EXCLUSIVE_REGS_ONLY :
-		case ISCSI_SCSI_PR_RESERVATION_TYPE_WRITE_EXCLUSIVE_ALL_REGS : {
-			if ( (reg == NULL) && dma_to_device ) {
-				iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_RESERVATION_CONFLICT, ISCSI_SCSI_SENSE_KEY_NO_SENSE, ISCSI_SCSI_ASC_NO_ADDITIONAL_SENSE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-				return ISCSI_SCSI_TASK_RUN_UNKNOWN;
-			}
-
-			break;
-		}
-		case ISCSI_SCSI_PR_RESERVATION_TYPE_EXCLUSIVE_ACCESS_REGS_ONLY :
-		case ISCSI_SCSI_PR_RESERVATION_TYPE_EXCLUSIVE_ACCESS_ALL_REGS : {
-			if ( reg == NULL ) {
-				iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_RESERVATION_CONFLICT, ISCSI_SCSI_SENSE_KEY_NO_SENSE, ISCSI_SCSI_ASC_NO_ADDITIONAL_SENSE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-				return ISCSI_SCSI_TASK_RUN_UNKNOWN;
-			}
-
-			break;
-		}
-		default : {
-			break;
-		}
-	}
-
-	return ISCSI_SCSI_TASK_RUN_COMPLETE;
-}
-
-/**
- * @brief Constructs an iSCSI SCSI Persistent Reservation (PR) out parameter list of an iSCSI SCSI task.
- *
- * This function also sets the SCSI
- * status result code accordingly.
- *
- * @param[in] scsi_task Pointer to iSCSI SCSI task to
- * construct Persistent Reservation (PR)
- * out parameter list for. May NOT be NULL,
- * so be careful.
- * @param[in] pr_reserve_out_parameter_list Pointer to iSCSI SCSI Persistent
- * Reservation (PR) out parameter list. NULL
- * is NOT allowed here, take caution.
- * @param[in] cdb_pr_reserve_out Pointer to iSCSI SCSI Command
- * Descriptor Block (CDB) to construct the
- * out data from and may NOT be NULL, so be
- * careful.
- * @param[in] len Length of parameter list in bytes.
- * @return 0 on successful operation, a negative
- * error code otherwise.
- */
-int iscsi_scsi_pr_out(iscsi_scsi_task *scsi_task, iscsi_scsi_pr_reserve_out_parameter_list_packet *pr_reserve_out_parameter_list, const iscsi_scsi_cdb_pr_reserve_out *cdb_pr_reserve_out, const uint len)
-{
-	// TODO: Implement function.
-
-	return 0;
-}
-
-/**
- * @brief Constructs iSCSI SCSI Persistent Reservation (PR) in parameter data of an iSCSI SCSI task.
- *
- * This function also sets the SCSI
- * status result code accordingly.
- *
- * @param[in] scsi_task Pointer to iSCSI SCSI task to
- * construct Persistent Reservation (PR)
- * in parameter data for. May NOT be NULL,
- * so be careful.
- * @param[in] pr_reserve_in_parameter_data Pointer to iSCSI SCSI Persistent
- * Reservation (PR) in parameter data. NULL
- * is NOT allowed here, take caution.
- * @param[in] cdb_pr_reserve_in Pointer to iSCSI SCSI Command
- * Descriptor Block (CDB) to construct the
- * in data from and may NOT be NULL, so be
- * careful.
- * @param[in] len Length of parameter data in bytes.
- * @return 0 on successful operation, a negative
- * error code otherwise.
- */
-int iscsi_scsi_pr_in(iscsi_scsi_task *scsi_task, iscsi_scsi_pr_reserve_in_parameter_data_packet *pr_reserve_in_parameter_data, const iscsi_scsi_cdb_pr_reserve_in *cdb_pr_reserve_in, const uint len)
-{
-	// TODO: Implement function.
-
-	return 0;
-}
-
-/**
- * @brief Reserves an iSCSI SCSI Persistent Reservation (PR) of an iSCSI SCSI task.
- *
- * This function also sets the SCSI
- * status result code accordingly.
- *
- * @param[in] scsi_task Pointer to iSCSI SCSI task to
- * reserve the Persistent Reservation
- * (PR) for. May NOT be NULL, so be
- * careful.
- * @param[in] cdb_pr_reserve_6 Pointer to iSCSI SCSI Command
- * Descriptor Block (CDB) to reserve the
- * data from. NULL is NOT allowed here,
- * take caution.
- * @return 0 on successful operation, a negative
- * error code otherwise.
- */
-int iscsi_scsi_pr_reserve_scsi2(iscsi_scsi_task *scsi_task, const iscsi_scsi_cdb_pr_reserve_6 *cdb_pr_reserve_6)
-{
-	// TODO: Implement function.
-
-	return 0;
-}
-
-/**
- * @brief Releases an iSCSI SCSI Persistent Reservation (PR) of an iSCSI SCSI task.
- *
- * This function also sets the SCSI
- * status result code accordingly.
- *
- * @param[in] scsi_task Pointer to iSCSI SCSI task to
- * release the Persistent Reservation
- * (PR) for. May NOT be NULL, so be
- * careful.
- * @return 0 on successful operation, a negative
- * error code otherwise.
- */
-int iscsi_scsi_pr_release_scsi2(iscsi_scsi_task *scsi_task)
-{
-	// TODO: Implement function.
-
-	return 0;
-}
-
-/**
- * @brief Checks whether an I/O feature is supported by a DNBD3 image.
- *
- * This function depends on DNBD3 image
- * properties and queries only one I/O
- * feature at once.
- *
- * @param[in] image Pointer to DNBD3 image to check I/O
- * attributes for. May NOT be NULL, so be
- * careful.
- * @param[in] type I/O type to be checked for.
- * @retval true The DNBD3 image supports the I/O feature.
- * @retval false The I/O feature is NOT supported for the
- * DNBD3 image.
- */
-static inline bool iscsi_scsi_emu_io_type_is_supported(const dnbd3_image_t *image, const int type)
-{
-	// TODO: Actually implement this function.
-
-	int32_t flags;
-
-	switch ( type ) {
-		case ISCSI_SCSI_EMU_IO_TYPE_REMOVABLE : {
-			flags = iscsi_config_get( (uint8_t *) image->name, ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_REMOVABLE );
-
-			if ( flags < 0L )
-				flags = iscsi_config_get( NULL, ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_REMOVABLE );
-
-			return (bool) flags;
-
-			break;
-		}
-		case ISCSI_SCSI_EMU_IO_TYPE_UNMAP : {
-			flags = iscsi_config_get( (uint8_t *) image->name, ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_UNMAP );
-
-			if ( flags < 0L )
-				flags = iscsi_config_get( NULL, ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_UNMAP );
-
-			return (bool) flags;
-
-			break;
-		}
-		case ISCSI_SCSI_EMU_IO_TYPE_NO_ROTATION : {
-			flags = iscsi_config_get( (uint8_t *) image->name, ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_NO_ROTATION );
-
-			if ( flags < 0L )
-				flags = iscsi_config_get( NULL, ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_NO_ROTATION );
-
-			return (bool) flags;
-
-			break;
-		}
-		case ISCSI_SCSI_EMU_IO_TYPE_PHYSICAL_READ_ONLY : {
-			flags = iscsi_config_get( (uint8_t *) image->name, ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_PHYSICAL_READ_ONLY );
-
-			if ( flags < 0L )
-				flags = iscsi_config_get( NULL, ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_PHYSICAL_READ_ONLY );
-
-			return (bool) flags;
-
-			break;
-		}
-		case ISCSI_SCSI_EMU_IO_TYPE_WRITE_PROTECT : {
-			flags = iscsi_config_get( (uint8_t *) image->name, ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_WRITE_PROTECT );
-
-			if ( flags < 0L )
-				flags = iscsi_config_get( NULL, ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_WRITE_PROTECT );
-
-			return (bool) flags;
-
-			break;
-		}
-		case ISCSI_SCSI_EMU_IO_TYPE_WRITE_CACHE : {
-			flags = iscsi_config_get( (uint8_t *) image->name, ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_WRITE_CACHE );
-
-			if ( flags < 0L )
-				flags = iscsi_config_get( NULL, ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_WRITE_CACHE );
-
-			return (bool) flags;
-
-			break;
-		}
-		default : {
-			return false;
-
-			break;
-		}
-	}
-
-	return false;
-}
-
-/**
- * @brief Retrieves the number of total physical blocks for a DNBD3 image.
- *
- * This function depends on DNBD3 image
- * properties.
- *
- * @param[in] image Pointer to DNBD3 image to retrieve
- * the physical size from. May NOT be NULL,
- * so be careful.
- * @return The number of total physical blocks.
- */
-static inline uint64_t iscsi_scsi_emu_physical_block_get_count(const dnbd3_image_t *image)
-{
-	int32_t block_size_shift = iscsi_config_get( (uint8_t *) image->name, ISCSI_GLOBALS_CONFIG_TYPE_SCSI_PHYSICAL_BLOCK_SIZE_SHIFT );
-
-	if ( block_size_shift < 0L )
-		block_size_shift = iscsi_config_get( NULL, ISCSI_GLOBALS_CONFIG_TYPE_SCSI_PHYSICAL_BLOCK_SIZE_SHIFT );
-
-	return (image->virtualFilesize >> (uint32_t) block_size_shift);
-}
-
-/**
- * @brief Retrieves the bit shift of a physical block in bytes for a DNBD3 image.
- *
- * This function depends on DNBD3 image
- * properties.
- *
- * @param[in] image Pointer to DNBD3 image to retrieve
- * the physical bit shift size. May NOT
- * be NULL, so be careful.
- * @return The physical block size in bytes as a
- * bit shift count.
- */
-static inline uint32_t iscsi_scsi_emu_physical_block_get_size_shift(const dnbd3_image_t *image)
-{
-	int32_t block_size_shift = iscsi_config_get( (uint8_t *) image->name, ISCSI_GLOBALS_CONFIG_TYPE_SCSI_PHYSICAL_BLOCK_SIZE_SHIFT );
-
-	if ( block_size_shift < 0L )
-		block_size_shift = iscsi_config_get( NULL, ISCSI_GLOBALS_CONFIG_TYPE_SCSI_PHYSICAL_BLOCK_SIZE_SHIFT );
-
-	return block_size_shift;
 }
 
 /**
@@ -5066,12 +873,7 @@ static inline uint32_t iscsi_scsi_emu_physical_block_get_size_shift(const dnbd3_
  */
 static inline uint32_t iscsi_scsi_emu_physical_block_get_size(const dnbd3_image_t *image)
 {
-	int32_t block_size = iscsi_config_get( (uint8_t *) image->name, ISCSI_GLOBALS_CONFIG_TYPE_SCSI_PHYSICAL_BLOCK_SIZE );
-
-	if ( block_size < 0L )
-		block_size = iscsi_config_get( NULL, ISCSI_GLOBALS_CONFIG_TYPE_SCSI_PHYSICAL_BLOCK_SIZE );
-
-	return block_size;
+	return ISCSI_SCSI_EMU_PHYSICAL_BLOCK_SIZE;
 }
 
 /**
@@ -5087,92 +889,7 @@ static inline uint32_t iscsi_scsi_emu_physical_block_get_size(const dnbd3_image_
  */
 static inline uint64_t iscsi_scsi_emu_block_get_count(const dnbd3_image_t *image)
 {
-	int32_t block_size_shift = iscsi_config_get( (uint8_t *) image->name, ISCSI_GLOBALS_CONFIG_TYPE_SCSI_LOGICAL_BLOCK_SIZE_SHIFT );
-
-	if ( block_size_shift < 0L )
-		block_size_shift = iscsi_config_get( NULL, ISCSI_GLOBALS_CONFIG_TYPE_SCSI_LOGICAL_BLOCK_SIZE_SHIFT );
-
-	return (image->virtualFilesize >> (uint32_t) block_size_shift);
-}
-
-/**
- * @brief Retrieves the bit shift of a logical block in bytes for a DNBD3 image.
- *
- * This function depends on DNBD3 image
- * properties.
- *
- * @param[in] image Pointer to DNBD3 image to retrieve
- * the logical block bit shift size.
- * May NOT be NULL, so be careful.
- * @return The logical block size in bytes as a
- * bit shift count.
- */
-static inline uint32_t iscsi_scsi_emu_block_get_size_shift(const dnbd3_image_t *image)
-{
-	int32_t block_size_shift = iscsi_config_get( (uint8_t *) image->name, ISCSI_GLOBALS_CONFIG_TYPE_SCSI_LOGICAL_BLOCK_SIZE_SHIFT );
-
-	if ( block_size_shift < 0L )
-		block_size_shift = iscsi_config_get( NULL, ISCSI_GLOBALS_CONFIG_TYPE_SCSI_LOGICAL_BLOCK_SIZE_SHIFT );
-
-	return block_size_shift;
-}
-
-/**
- * @brief Retrieves the size of a logical block in bytes for a DNBD3 image.
- *
- * This function depends on DNBD3 image
- * properties.
- *
- * @param[in] image Pointer to DNBD3 image to retrieve
- * the logical block size. May NOT be NULL,
- * so be careful.
- * @return The logical block size in bytes.
- */
-static inline uint32_t iscsi_scsi_emu_block_get_size(const dnbd3_image_t *image)
-{
-	int32_t block_size = iscsi_config_get( (uint8_t *) image->name, ISCSI_GLOBALS_CONFIG_TYPE_SCSI_LOGICAL_BLOCK_SIZE );
-
-	if ( block_size < 0L )
-		block_size = iscsi_config_get( NULL, ISCSI_GLOBALS_CONFIG_TYPE_SCSI_LOGICAL_BLOCK_SIZE );
-
-	return block_size;
-}
-
-/**
- * @brief Retrieves the bit shift ratio between logical and physical block size for a DNBD3 image.
- *
- * This function depends on DNBD3 image
- * properties.
- *
- * @param[in] image Pointer to DNBD3 image to retrieve
- * the ratio between the logical and
- * physical block size. May NOT be
- * NULL, so be careful.
- * @return The ratio between logical and physical
- * block size as a logical bit shift
- * count.
- */
-static inline uint32_t iscsi_scsi_emu_block_get_ratio_shift(const dnbd3_image_t *image)
-{
-	return (iscsi_scsi_emu_physical_block_get_size_shift( image ) - iscsi_scsi_emu_block_get_size_shift( image ));
-}
-
-/**
- * @brief Retrieves the ratio between logical and physical block size for a DNBD3 image.
- *
- * This function depends on DNBD3 image
- * properties.
- *
- * @param[in] image Pointer to DNBD3 image to retrieve
- * the ratio between the logical and
- * physical block size. May NOT be
- * NULL, so be careful.
- * @return The ratio between logical logical and physical
- * block size.
- */
-static inline uint32_t iscsi_scsi_emu_block_get_ratio(const dnbd3_image_t *image)
-{
-	return (1UL << iscsi_scsi_emu_block_get_ratio_shift( image ));
+	return (image->virtualFilesize / ISCSI_SCSI_EMU_BLOCK_SIZE);
 }
 
 /**
@@ -5194,51 +911,32 @@ static inline uint32_t iscsi_scsi_emu_block_get_ratio(const dnbd3_image_t *image
  * bytes is aligned to block size or a
  * positive value if unaligned.
  */
-static uint64_t iscsi_scsi_emu_bytes_to_blocks(uint64_t *offset_blocks, uint64_t *num_blocks, const uint64_t offset_bytes, const uint64_t num_bytes, const uint32_t block_size)
+static uint64_t iscsi_scsi_emu_bytes_to_blocks(uint64_t *offset_blocks, uint64_t *num_blocks, const uint64_t offset_bytes, const uint64_t num_bytes)
 {
-	if ( iscsi_is_pow2( block_size ) ) {
-		const uint32_t shift = iscsi_get_log2_of_pow2( block_size );
-
-		*offset_blocks = (offset_bytes >> shift);
-		*num_blocks    = (num_bytes >> shift);
-
-		return ((offset_bytes - (*offset_blocks << shift)) | (num_bytes - (*num_blocks << shift)));
-	}
-
-	*offset_blocks = (offset_bytes / block_size);
-	*num_blocks    = (num_bytes / block_size);
+	*offset_blocks = (offset_bytes / ISCSI_SCSI_EMU_BLOCK_SIZE);
+	*num_blocks    = (num_bytes / ISCSI_SCSI_EMU_BLOCK_SIZE);
 
-	return ((offset_bytes % block_size) | (num_bytes % block_size));
+	return ((offset_bytes % ISCSI_SCSI_EMU_BLOCK_SIZE) | (num_bytes % ISCSI_SCSI_EMU_BLOCK_SIZE));
 }
 
 /**
- * @brief Enqueues an I/O task in the waiting queue.
+ * @brief Converts offset and length specified by a block size to offset and length in bytes.
  *
- * This function invokes a callback function
- * with optional user data.
+ * This function uses bit shifting if
+ * the block size is a power of two.
  *
- * @param[in] scsi_task Pointer to iSCSI SCSI task associated
- * to the I/O process in the waiting queue.
- * May NOT be NULL, so be careful.
- * @param[in] callback Pointer to an I/O wait callback
- * function which executes the pending I/O
- * operation. NULL is NOT allowed here, so
- * take caution.
- * @param[in] user_data Pointer to optional user data for
- * the callback function.
- * @retval -1 The I/O task could not be
- * run in the waiting queue.
- * @retval 0 The I/O task has been added
- * successfully in the I/O task waiting
- * queue.
+ * @param[out] offset_bytes Pointer where to store the block
+ * in bytes. May NOT be NULL, so be
+ * careful.
+ * @param[in] offset_blocks Offset in blocks.
+ * @param[in] num_blocks Number of blocks.
+ * @return Number of blocks in bytes.
  */
-static int iscsi_scsi_emu_queue_io_wait(iscsi_scsi_task *scsi_task, iscsi_scsi_emu_io_wait_callback callback, uint8_t *user_data)
+static uint64_t iscsi_scsi_emu_blocks_to_bytes(uint64_t *offset_bytes, const uint64_t offset_blocks, const uint64_t num_blocks)
 {
-	scsi_task->io_wait.image     = scsi_task->lun->image;
-	scsi_task->io_wait.callback  = callback;
-	scsi_task->io_wait.user_data = user_data;
+	*offset_bytes = (offset_blocks * ISCSI_SCSI_EMU_BLOCK_SIZE);
 
-	return iscsi_scsi_emu_io_queue( &scsi_task->io_wait );
+	return (num_blocks * ISCSI_SCSI_EMU_BLOCK_SIZE);
 }
 
 /**
@@ -5250,7 +948,8 @@ static int iscsi_scsi_emu_queue_io_wait(iscsi_scsi_task *scsi_task, iscsi_scsi_e
  *
  * @param[in] data Pointer to related scsi_task. May NOT
  * be NULL, so be careful.
- * @param[in] handle Uplink handle.
+ * @param[in] handle Pointer to destination buffer, as passed to
+ * iscsi_scsi_emu_io_block_read().
  * @param[in] start Start of range in bytes.
  * @param[in] length Length of range in bytes, as passed to
  * uplink_request().
@@ -5268,35 +967,6 @@ static void iscsi_uplink_callback(void *data, uint64_t handle UNUSED, uint64_t s
 }
 
 /**
- * @brief Converts offset and length specified by a block size to offset and length in bytes.
- *
- * This function uses bit shifting if
- * the block size is a power of two.
- *
- * @param[out] offset_bytes Pointer where to store the block
- * in bytes. May NOT be NULL, so be
- * careful.
- * @param[in] offset_blocks Offset in blocks.
- * @param[in] num_blocks Number of blocks.
- * @param[in] block_size Block size in bytes.
- * @return Number of blocks in bytes.
- */
-static uint64_t iscsi_scsi_emu_blocks_to_bytes(uint64_t *offset_bytes, const uint64_t offset_blocks, const uint64_t num_blocks, const uint32_t block_size)
-{
-	if ( iscsi_is_pow2( block_size ) ) {
-		const uint32_t shift = iscsi_get_log2_of_pow2( block_size );
-
-		*offset_bytes = (offset_blocks << shift);
-
-		return (num_blocks << shift);
-	}
-
-	*offset_bytes = (offset_blocks * block_size);
-
-	return (num_blocks * block_size);
-}
-
-/**
  * @brief Reads a number of blocks from a block offset of a DNBD3 image to a specified buffer.
  *
  * This function enqueues the I/O read
@@ -5313,22 +983,16 @@ static uint64_t iscsi_scsi_emu_blocks_to_bytes(uint64_t *offset_bytes, const uin
  * @param[in] offset_blocks Offset in blocks to start reading from.
  * @param[in] num_blocks Number of blocks to read.
  * @param[in] block_size Block size in bytes.
- * @param[in] callback Pointer to callback function to invoke
- * after I/O read operation has been
- * finished. NULL is a prohibited
- * value, so be careful.
- * @param[in] user_data Pointer to user data passed to the
- * callback function.
  * @return 0 on successful operation, a negative
  * error code otherwise.
  */
-int iscsi_scsi_emu_io_block_read(iscsi_scsi_task *scsi_task, dnbd3_image_t *image, const uint64_t offset_blocks, const uint64_t num_blocks, const uint32_t block_size, iscsi_scsi_emu_io_complete_callback callback, uint8_t *user_data)
+static int iscsi_scsi_emu_io_blocks_read(iscsi_scsi_task *scsi_task,  dnbd3_image_t *image, const uint64_t offset_blocks, const uint64_t num_blocks)
 {
 	uint64_t offset_bytes;
-	const uint64_t num_bytes = iscsi_scsi_emu_blocks_to_bytes( &offset_bytes, offset_blocks, num_blocks, block_size );
+	const uint64_t num_bytes = iscsi_scsi_emu_blocks_to_bytes( &offset_bytes, offset_blocks, num_blocks );
+
 	dnbd3_cache_map_t *cache = ref_get_cachemap( image );
 	bool readFromFile;
-	bool success;
 
 	if ( cache == NULL ) {
 		readFromFile = true;
@@ -5342,212 +1006,42 @@ int iscsi_scsi_emu_io_block_read(iscsi_scsi_task *scsi_task, dnbd3_image_t *imag
 
 		if ( !readFromFile ) {
 			// Not cached, request via uplink
+			pthread_mutex_init( &scsi_task->uplink_mutex, NULL );
+			pthread_cond_init( &scsi_task->uplink_cond, NULL );
+			pthread_mutex_lock( &scsi_task->uplink_mutex );
 
-			if ( pthread_mutex_init( &scsi_task->uplink_mutex, NULL ) != 0 ) {
-				logadd( LOG_ERROR, "iscsi_scsi_emu_io_block_read: Error while initializing DNBD3 uplink mutex for iSCSI SCSI task" );
-
-				return -ENOMEM;
-			}
-
-			if ( pthread_cond_init( &scsi_task->uplink_cond, NULL ) != 0 ) {
-				logadd( LOG_ERROR, "iscsi_scsi_emu_io_block_read: Error while initializing DNBD3 uplink condition for iSCSI SCSI task" );
+			if ( !uplink_request( image, scsi_task, iscsi_uplink_callback, 0, offset_bytes, num_bytes ) ) {
+				pthread_mutex_unlock( &scsi_task->uplink_mutex );
 
-				pthread_mutex_destroy( &scsi_task->uplink_mutex );
+				logadd( LOG_DEBUG1, "Could not relay uncached request to upstream proxy for image %s:%d",
+						image->name, image->rid );
 
-				return -ENOMEM;
+				return -EIO;
 			}
 
-			pthread_mutex_lock( &scsi_task->uplink_mutex );
-			success = uplink_request( image, (void *) scsi_task, iscsi_uplink_callback, 0ULL, offset_bytes, (uint32_t) num_bytes );
-
-			if ( success )
-				pthread_cond_wait( &scsi_task->uplink_cond, &scsi_task->uplink_mutex );
-
+			// Wait sync (Maybe use pthread_cond_timedwait to detect unavailable uplink instead of hanging...)
+			pthread_cond_wait( &scsi_task->uplink_cond, &scsi_task->uplink_mutex );
 			pthread_mutex_unlock( &scsi_task->uplink_mutex );
 			pthread_cond_destroy( &scsi_task->uplink_cond );
 			pthread_mutex_destroy( &scsi_task->uplink_mutex );
 		}
 	}
 
+	bool success;
+
 	if ( readFromFile ) {
 		const int64_t len = pread( image->readFd, scsi_task->buf, (size_t) num_bytes, offset_bytes );
 		success           = ((uint64_t) len == num_bytes);
+	} else {
+		success = true;
 	}
 
-	iscsi_connection_exec_queue *exec_queue = (iscsi_connection_exec_queue *) malloc( sizeof(struct iscsi_connection_exec_queue) );
-
-	if ( exec_queue == NULL ) {
-		logadd( LOG_ERROR, "iscsi_scsi_emu_io_block_read: Out of memory while allocating execution queue for I/O read" );
-
-		return -ENOMEM;
-	}
-
-	exec_queue->data.io.callback  = callback;
-	exec_queue->data.io.image     = image;
-	exec_queue->data.io.user_data = user_data;
-	exec_queue->data.io.success   = success;
-	exec_queue->type              = ISCSI_CONNECT_EXEC_QUEUE_TYPE_SCSI_EMU_IO;
-
-	iscsi_task *task = ISCSI_CONTAINER(iscsi_task, scsi_task, scsi_task);
-
-	iscsi_list_enqueue( &task->conn->exec_queue, &exec_queue->node );
-
-	return (success ? 0 : -EIO);
-}
-
-/**
- * @brief Completes an iSCSI SCSI task after a finished I/O read operation.
- *
- * THis function also sets the SCSI status
- * and error code as required.
- *
- * @param[in] image Pointer to DNBD3 image where
- * the I/O read operation occured and
- * may NOT be NULL, so be careful.
- * @param[in] user_data Pointer to the iSCSI SCSI task
- * responsible for this I/O operation.
- * NULL is NOT allowed here, so take
- * caution.
- * @param[in] success true if the I/O operation has been
- * completed successfully, false otherwise.
- * @return Pointer to passed user data.
- */
-uint8_t *iscsi_scsi_emu_block_read_complete_callback(dnbd3_image_t *image, uint8_t *user_data, const bool success)
-{
-	iscsi_scsi_task *scsi_task = (iscsi_scsi_task *) user_data;
-
 	if ( success )
 		scsi_task->status = ISCSI_SCSI_STATUS_GOOD;
 	else
 		iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_MEDIUM_ERR, ISCSI_SCSI_ASC_UNRECOVERED_READ_ERR, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
 
-	iscsi_scsi_lun_task_complete( scsi_task->lun, scsi_task );
-
-	return user_data;
-}
-
-/**
- * @brief Compares and writes a number of blocks starting from a block offset in a DNBD3 image with specified buffers.
- *
- * This function enqueues the I/O compare
- * and write process which invokes a
- * callback function when the compare and
- * write operation has been finished.
- *
- * @param[in] scsi_task Pointer to iSCSI SCSI task which
- * executes the I/O compare and write
- * operation, may NOT be NULL, so be
- * careful.
- * @param[in] cmp_buf Pointer to buffer which contains
- * the data to be compared and may NOT
- * be NULL, so be careful.
- * @param[in] image Pointer to DNBD3 image to write
- * data to. NULL is an illegal value,
- * take caution.
- * @param[in] offset_blocks Offset in blocks to start writing to.
- * @param[in] num_blocks Number of blocks to write.
- * @param[in] block_size Block size in bytes.
- * @param[in] callback Pointer to callback function to invoke
- * after I/O compare and write operation
- * has been finished. NULL is a
- * prohibited value, so be careful.
- * @param[in] user_data Pointer to user data passed to the
- * callback function.
- * @return 0 on successful operation, a negative
- * error code otherwise.
- */
-int iscsi_scsi_emu_io_block_cmp_write(iscsi_scsi_task *scsi_task, uint8_t *cmp_buf, dnbd3_image_t *image, const uint64_t offset_blocks, const uint64_t num_blocks, const uint32_t block_size, iscsi_scsi_emu_io_complete_callback callback, uint8_t *user_data)
-{
-	// TODO: Implement compare and write I/O.
-
-	return ISCSI_SCSI_TASK_RUN_COMPLETE;
-}
-
-/**
- * @brief Completes an iSCSI SCSI task after a finished I/O write operation.
- *
- * THis function also sets the SCSI status
- * and error code as required.
- *
- * @param[in] image Pointer to DNBD3 image where
- * the I/O write operation occured and
- * may NOT be NULL, so be careful.
- * @param[in] user_data Pointer to the iSCSI SCSI task
- * responsible for this I/O operation.
- * NULL is NOT allowed here, so take
- * caution.
- * @param[in] success true if the I/O operation has been
- * completed successfully, false otherwise.
- * @return Pointer to passed user data.
- */
-uint8_t *iscsi_scsi_emu_block_write_complete_callback(dnbd3_image_t *image, uint8_t *user_data, const bool success)
-{
-	iscsi_scsi_task *scsi_task = (iscsi_scsi_task *) user_data;
-
-	free( scsi_task->buf );
-	scsi_task->buf = NULL;
-
-	if ( success )
-		scsi_task->status = ISCSI_SCSI_STATUS_GOOD;
-	else
-		iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_MEDIUM_ERR, ISCSI_SCSI_ASC_WRITE_ERR, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-	iscsi_scsi_lun_task_complete( scsi_task->lun, scsi_task );
-
-	return user_data;
-}
-
-/**
- * @brief Writes a number of blocks from a block offset to a DNBD3 image of a specified buffer.
- *
- * This function enqueues the I/O write
- * process which invokes a callback
- * function when the write operation
- * has been finished.
- *
- * @param[in] scsi_task Pointer to iSCSI SCSI task which
- * executes the I/O write operation, may
- * NOT be NULL, so be careful.
- * @param[in] image Pointer to DNBD3 image to write
- * data to and may NOT be NULL, so
- * be careful.
- * @param[in] offset_blocks Offset in blocks to start writing to.
- * @param[in] num_blocks Number of blocks to write.
- * @param[in] block_size Block size in bytes.
- * @param[in] callback Pointer to callback function to invoke
- * after I/O write operation has been
- * finished. NULL is a prohibited
- * value, so be careful.
- * @param[in] user_data Pointer to user data passed to the
- * callback function.
- * @return 0 on successful operation, a negative
- * error code otherwise.
- */
-int iscsi_scsi_emu_io_block_write(iscsi_scsi_task *scsi_task, dnbd3_image_t *image, const uint64_t offset_blocks, const uint64_t num_blocks, const uint32_t block_size, iscsi_scsi_emu_io_complete_callback callback, uint8_t *user_data)
-{
-	uint64_t offset_bytes;
-	const uint64_t num_bytes                = iscsi_scsi_emu_blocks_to_bytes( &offset_bytes, offset_blocks, num_blocks, block_size );
-	const int64_t len                       = pwrite( image->readFd, scsi_task->buf, (size_t) num_bytes, offset_bytes );
-	const bool success                      = ((uint64_t) len == num_bytes);
-	iscsi_connection_exec_queue *exec_queue = (iscsi_connection_exec_queue *) malloc( sizeof(struct iscsi_connection_exec_queue) );
-
-	if ( exec_queue == NULL ) {
-		logadd( LOG_ERROR, "iscsi_scsi_emu_io_block_read: Out of memory while allocating execution queue for I/O write" );
-
-		return -ENOMEM;
-	}
-
-	exec_queue->data.io.callback  = callback;
-	exec_queue->data.io.image     = image;
-	exec_queue->data.io.user_data = user_data;
-	exec_queue->data.io.success   = success;
-	exec_queue->type              = ISCSI_CONNECT_EXEC_QUEUE_TYPE_SCSI_EMU_IO;
-
-	iscsi_task *task = ISCSI_CONTAINER(iscsi_task, scsi_task, scsi_task);
-
-	iscsi_list_enqueue( &task->conn->exec_queue, &exec_queue->node );
-
-	return (success ? 0 : -EIO);
+	return (success ? 0 : -1);
 }
 
 /**
@@ -5577,15 +1071,21 @@ static int iscsi_scsi_emu_block_read_write(dnbd3_image_t *image, iscsi_scsi_task
 {
 	scsi_task->xfer_pos = 0UL;
 
+	if ( (flags & ISCSI_SCSI_EMU_BLOCK_FLAGS_WRITE) != 0 ) {
+		iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_NO_SENSE, ISCSI_SCSI_ASC_NO_ADDITIONAL_SENSE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
+
+		return ISCSI_SCSI_TASK_RUN_COMPLETE;
+	}
+
 	if ( (scsi_task->flags & (ISCSI_SCSI_TASK_FLAGS_XFER_READ | ISCSI_SCSI_TASK_FLAGS_XFER_WRITE)) == (ISCSI_SCSI_TASK_FLAGS_XFER_READ | ISCSI_SCSI_TASK_FLAGS_XFER_WRITE) ) {
 		iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_NO_SENSE, ISCSI_SCSI_ASC_NO_ADDITIONAL_SENSE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
 
 		return ISCSI_SCSI_TASK_RUN_COMPLETE;
 	}
 
-	const uint64_t block_count = iscsi_scsi_emu_block_get_count( image );
+	const uint64_t imgBlockCount = iscsi_scsi_emu_block_get_count( image );
 
-	if ( (block_count <= lba) || ((block_count - lba) < xfer_len) ) {
+	if ( (imgBlockCount <= lba) || ((imgBlockCount - lba) < xfer_len) ) {
 		iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_ILLEGAL_REQ, ISCSI_SCSI_ASC_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
 
 		return ISCSI_SCSI_TASK_RUN_COMPLETE;
@@ -5597,14 +1097,7 @@ static int iscsi_scsi_emu_block_read_write(dnbd3_image_t *image, iscsi_scsi_task
 		return ISCSI_SCSI_TASK_RUN_COMPLETE;
 	}
 
-	const uint32_t block_size  = iscsi_scsi_emu_block_get_size( image );
-	const bool block_size_pow2 = iscsi_is_pow2( block_size );
-	uint32_t block_size_shift;
-
-	if ( block_size_pow2 )
-		block_size_shift = iscsi_scsi_emu_block_get_size_shift( image );
-
-	const uint32_t max_xfer_len = (block_size_pow2 ? (ISCSI_SCSI_EMU_MAX_XFER_LEN >> block_size_shift) : (ISCSI_SCSI_EMU_MAX_XFER_LEN / block_size));
+	const uint32_t max_xfer_len = ISCSI_MAX_DS_SIZE / ISCSI_SCSI_EMU_BLOCK_SIZE;
 
 	if ( xfer_len > max_xfer_len ) {
 		iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_ILLEGAL_REQ, ISCSI_SCSI_ASC_INVALID_FIELD_IN_CDB, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
@@ -5612,16 +1105,10 @@ static int iscsi_scsi_emu_block_read_write(dnbd3_image_t *image, iscsi_scsi_task
 		return ISCSI_SCSI_TASK_RUN_COMPLETE;
 	}
 
-	if ( ((flags & ISCSI_SCSI_EMU_BLOCK_FLAGS_WRITE) != 0) && ((block_size_pow2 ? (xfer_len << block_size_shift) : (xfer_len * block_size)) > scsi_task->xfer_len) ) {
-		iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_NO_SENSE, ISCSI_SCSI_ASC_NO_ADDITIONAL_SENSE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-		return ISCSI_SCSI_TASK_RUN_COMPLETE;
-	}
-
 	uint64_t offset_blocks;
 	uint64_t num_blocks;
 
-	if ( iscsi_scsi_emu_bytes_to_blocks( &offset_blocks, &num_blocks, scsi_task->pos, scsi_task->len, block_size ) != 0ULL ) {
+	if ( iscsi_scsi_emu_bytes_to_blocks( &offset_blocks, &num_blocks, scsi_task->pos, scsi_task->len ) != 0ULL ) {
 		iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_NO_SENSE, ISCSI_SCSI_ASC_NO_ADDITIONAL_SENSE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
 
 		return ISCSI_SCSI_TASK_RUN_COMPLETE;
@@ -5631,39 +1118,23 @@ static int iscsi_scsi_emu_block_read_write(dnbd3_image_t *image, iscsi_scsi_task
 
 	int rc;
 
-	if ( (flags & ISCSI_SCSI_EMU_BLOCK_FLAGS_WRITE) == 0 ) {
-		scsi_task->buf = (uint8_t *) malloc( scsi_task->len );
-
-		if ( scsi_task->buf == NULL ) {
-			iscsi_scsi_emu_queue_io_wait( scsi_task, iscsi_scsi_emu_block_resubmit_process_callback, (uint8_t *) scsi_task );
+	scsi_task->buf = (uint8_t *) malloc( scsi_task->len );
 
-			return ISCSI_SCSI_TASK_RUN_PENDING;
-		}
-
-		rc = iscsi_scsi_emu_io_block_read( scsi_task, image, offset_blocks, num_blocks, block_size, iscsi_scsi_emu_block_read_complete_callback, (uint8_t *) scsi_task );
-	} else if ( iscsi_scsi_emu_io_type_is_supported( image, ISCSI_SCSI_EMU_IO_TYPE_PHYSICAL_READ_ONLY ) || iscsi_scsi_emu_io_type_is_supported( image, ISCSI_SCSI_EMU_IO_TYPE_WRITE_PROTECT ) ) {
-		iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_DATA_PROTECT, ISCSI_SCSI_ASC_WRITE_PROTECTED, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
+	if ( scsi_task->buf == NULL ) {
+		iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_HARDWARE_ERR,
+			ISCSI_SCSI_ASC_INTERNAL_TARGET_FAIL, ISCSI_SCSI_ASC_NO_ADDITIONAL_SENSE );
 
 		return ISCSI_SCSI_TASK_RUN_COMPLETE;
-	} else if ( (flags & ISCSI_SCSI_EMU_BLOCK_FLAGS_VERIFY) != 0 ) {
-		if ( scsi_task->len != (block_size + block_size) ) {
-			iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_ILLEGAL_REQ, ISCSI_SCSI_ASC_INVALID_FIELD_IN_CDB, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-			return ISCSI_SCSI_TASK_RUN_COMPLETE;
-		}
-
-		uint8_t *cmp_buf = (scsi_task->buf + block_size);
-
-		rc = iscsi_scsi_emu_io_block_cmp_write( scsi_task, cmp_buf, image, offset_blocks, 1ULL, block_size, iscsi_scsi_emu_block_write_complete_callback, (uint8_t *) scsi_task );
-	} else {
-		rc = iscsi_scsi_emu_io_block_write( scsi_task, image, offset_blocks, num_blocks, block_size, iscsi_scsi_emu_block_write_complete_callback, (uint8_t *) scsi_task );
 	}
 
+	rc = iscsi_scsi_emu_io_blocks_read( scsi_task, image, offset_blocks, num_blocks );
+
 	if ( rc < 0 ) {
 		if ( rc == -ENOMEM ) {
-			iscsi_scsi_emu_queue_io_wait( scsi_task, iscsi_scsi_emu_block_resubmit_process_callback, (uint8_t *) scsi_task );
+			iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_HARDWARE_ERR,
+				ISCSI_SCSI_ASC_INTERNAL_TARGET_FAIL, ISCSI_SCSI_ASC_NO_ADDITIONAL_SENSE );
 
-			return ISCSI_SCSI_TASK_RUN_PENDING;
+			return ISCSI_SCSI_TASK_RUN_COMPLETE;
 		}
 
 		iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_NO_SENSE, ISCSI_SCSI_ASC_NO_ADDITIONAL_SENSE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
@@ -5673,149 +1144,7 @@ static int iscsi_scsi_emu_block_read_write(dnbd3_image_t *image, iscsi_scsi_task
 
 	scsi_task->xfer_pos = scsi_task->len;
 
-	return ISCSI_SCSI_TASK_RUN_PENDING;
-}
-
-/**
- * @brief Enqueues an I/O wait in the thread pool to execute.
- *
- * This function uses the DNBD3 image
- * name in order to identify the
- * newly created thread.
- *
- * @param[in] io_wait Pointer to I/O wait structure
- * containing the image name, the
- * callback function and optional
- * user data passed to callback. May
- * NOT be NULL, so be careful.
- * @retval -1 An error occured during the
- * thread enqeue operation.
- * @retval 0 The thread has been enqueued
- * successfully.
- */
-int iscsi_scsi_emu_io_queue(iscsi_scsi_emu_io_wait *io_wait)
-{
-	return (threadpool_run( (void *(*)(void *)) io_wait->callback, (void *) io_wait->user_data, io_wait->image->name ) ? 0 : -1);
-}
-
-/**
- * @brief Executes a cache synchronization operation on a DNBD3 image.
- *
- * This function also sets the SCSI
- * status result code accordingly.
- *
- * @param[in] image Pointer to DNBD3 image to
- * synchronize the cache of. May NOT
- * be NULL, so be careful.
- * @param[in] scsi_task Pointer to iSCSI SCSI task
- * responsible for this cache
- * synchronization. NULL is NOT
- * allowed here, take caution.
- * @param[in] lba Logical Block Address (LBA) to start
- * cache synchronization with.
- * @param[in] xfer_len Synchronization length in logical blocks.
- * @return 0 on successful operation, a negative
- * error code otherwise.
- */
-static int iscsi_scsi_emu_block_sync(dnbd3_image_t *image, iscsi_scsi_task *scsi_task, const uint64_t lba, const uint32_t xfer_len)
-{
-	// TODO: Implement SCSI emulation for DNBD3 image.
-
-	return 0;
-}
-
-/**
- * @brief Executes a unmap operation on a DNBD3 image.
- *
- * This function also sets the SCSI
- * status result code accordingly.
- *
- * @param[in] image Pointer to DNBD3 image to
- * unmap. May NOT be NULL, so be
- * careful.
- * @param[in] scsi_task Pointer to iSCSI SCSI task
- * responsible for this unmap
- * operation. NULL is NOT allowed
- * here, take caution.
- * @return 0 on successful operation, a negative
- * error code otherwise.
- */
-static int iscsi_scsi_emu_block_unmap(dnbd3_image_t *image, iscsi_scsi_task *scsi_task)
-{
-	// TODO: Implement SCSI emulation for DNBD3 image.
-
-	return 0;
-}
-
-/**
- * @brief Executes a write same operation on a DNBD3 image.
- *
- * This function also sets the SCSI
- * status result code accordingly.
- *
- * @param[in] image Pointer to DNBD3 image to write
- * to. May NOT be NULL, so be
- * careful.
- * @param[in] scsi_task Pointer to iSCSI SCSI task
- * responsible for this write task.
- * NULL is NOT allowed here, take
- * caution.
- * @param[in] lba Logical Block Address (LBA) to start
- * writing to.
- * @param[in] xfer_len Transfer length in logical blocks.
- * @param[in] flags SCSI (Command Descriptor Block) CDB flags.
- * @return 0 on successful operation, a negative
- * error code otherwise.
- */
-static int iscsi_scsi_emu_block_write_same(dnbd3_image_t *image, iscsi_scsi_task *scsi_task, const uint64_t lba, const uint32_t xfer_len, const int flags)
-{
-	// TODO: Implement SCSI emulation for DNBD3 image.
-
-	return 0;
-}
-
-/**
- * @brief Initializes a DNBD3 image for an iSCSI SCSI LUN retrieved from its iSCSI SCSI task and optionally check for read access.
- *
- * This function also sets the SCSI
- * status result code accordingly.
- *
- * @param[in] scsi_task Pointer to iSCSI SCSI task
- * to retrieve the iSCSI SCSI LUN
- * from in order to initialize the
- * DNBD3 image and also set the SCSI
- * error code. May NOT be NULL, so
- * be careful.
- * @param[in] access Check if read access for DNBD3
- * image is working.
- * @retval true The DNBD3 image has been initialized
- * successfully and is readable.
- * @retval false The DNBD3 image has NOT been
- * successfully and reading is not possible.
- */
-static bool iscsi_scsi_emu_image_init(iscsi_scsi_task *scsi_task, const bool access)
-{
-	// TODO: Handle server and proxy stuff.
-
-	iscsi_scsi_lun *lun = scsi_task->lun;
-
-	if ( lun->image == NULL ) {
-		lun->image = image_getOrLoad( (char *) lun->device->name, (uint16_t) lun->id );
-
-		if ( lun->image == NULL ) {
-			iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_NOT_READY, ISCSI_SCSI_ASC_LOGICAL_UNIT_NOT_READY, ISCSI_SCSI_ASCQ_MANUAL_INTERVENTION_REQUIRED );
-
-			return false;
-		}
-	}
-
-	if ( access && (!image_ensureOpen( lun->image ) || lun->image->problem.read || (lun->image->virtualFilesize == 0ULL)) ) {
-		iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_NOT_READY, ISCSI_SCSI_ASC_LOGICAL_UNIT_NOT_READY, ISCSI_SCSI_ASCQ_MANUAL_INTERVENTION_REQUIRED );
-
-		return false;
-	}
-
-	return true;
+	return ISCSI_SCSI_TASK_RUN_COMPLETE;
 }
 
 /**
@@ -5832,150 +1161,47 @@ static bool iscsi_scsi_emu_image_init(iscsi_scsi_task *scsi_task, const bool acc
  */
 static int iscsi_scsi_emu_block_process(iscsi_scsi_task *scsi_task)
 {
-	iscsi_scsi_lun *lun = scsi_task->lun;
 	uint64_t lba;
 	uint32_t xfer_len;
+	dnbd3_image_t *image = scsi_task->connection->client->image;
 
 	switch ( scsi_task->cdb->opcode ) {
 		case ISCSI_SCSI_OPCODE_READ6 : {
 			const iscsi_scsi_cdb_read_write_6 *cdb_read_write_6 = (iscsi_scsi_cdb_read_write_6 *) scsi_task->cdb;
 
-			if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-				break;
-
 			lba      = iscsi_get_be24(cdb_read_write_6->lba);
 			xfer_len = cdb_read_write_6->xfer_len;
 
 			if ( xfer_len == 0UL )
 				xfer_len = 256UL;
 
-			return iscsi_scsi_emu_block_read_write( lun->image, scsi_task, lba, xfer_len, 0 );
-
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_WRITE6 : {
-			const iscsi_scsi_cdb_read_write_6 *cdb_read_write_6 = (iscsi_scsi_cdb_read_write_6 *) scsi_task->cdb;
-
-			if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-				break;
-
-			lba      = iscsi_get_be24(cdb_read_write_6->lba);
-			xfer_len = cdb_read_write_6->xfer_len;
-
-			if ( xfer_len == 0UL )
-				xfer_len = 256UL;
-
-			return iscsi_scsi_emu_block_read_write( lun->image, scsi_task, lba, xfer_len, ISCSI_SCSI_EMU_BLOCK_FLAGS_WRITE );
-
-			break;
+			return iscsi_scsi_emu_block_read_write( image, scsi_task, lba, xfer_len, 0 );
 		}
 		case ISCSI_SCSI_OPCODE_READ10 : {
 			const iscsi_scsi_cdb_read_write_10 *cdb_read_write_10 = (iscsi_scsi_cdb_read_write_10 *) scsi_task->cdb;
 
-			if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-				break;
-
-			lba      = iscsi_get_be32(cdb_read_write_10->lba);
-			xfer_len = iscsi_get_be16(cdb_read_write_10->xfer_len);
-
-			return iscsi_scsi_emu_block_read_write( lun->image, scsi_task, lba, xfer_len, 0 );
-
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_WRITE10 : {
-			const iscsi_scsi_cdb_read_write_10 *cdb_read_write_10 = (iscsi_scsi_cdb_read_write_10 *) scsi_task->cdb;
-
-			if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-				break;
-
 			lba      = iscsi_get_be32(cdb_read_write_10->lba);
 			xfer_len = iscsi_get_be16(cdb_read_write_10->xfer_len);
 
-			return iscsi_scsi_emu_block_read_write( lun->image, scsi_task, lba, xfer_len, ISCSI_SCSI_EMU_BLOCK_FLAGS_WRITE );
-
-			break;
+			return iscsi_scsi_emu_block_read_write( image, scsi_task, lba, xfer_len, 0 );
 		}
 		case ISCSI_SCSI_OPCODE_READ12 : {
 			const iscsi_scsi_cdb_read_write_12 *cdb_read_write_12 = (iscsi_scsi_cdb_read_write_12 *) scsi_task->cdb;
 
-			if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-				break;
-
-			lba      = iscsi_get_be32(cdb_read_write_12->lba);
-			xfer_len = iscsi_get_be32(cdb_read_write_12->xfer_len);
-
-			return iscsi_scsi_emu_block_read_write( lun->image, scsi_task, lba, xfer_len, 0 );
-
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_WRITE12 : {
-			const iscsi_scsi_cdb_read_write_12 *cdb_read_write_12 = (iscsi_scsi_cdb_read_write_12 *) scsi_task->cdb;
-
-			if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-				break;
-
 			lba      = iscsi_get_be32(cdb_read_write_12->lba);
 			xfer_len = iscsi_get_be32(cdb_read_write_12->xfer_len);
 
-			return iscsi_scsi_emu_block_read_write( lun->image, scsi_task, lba, xfer_len, ISCSI_SCSI_EMU_BLOCK_FLAGS_WRITE );
-
-			break;
+			return iscsi_scsi_emu_block_read_write( image, scsi_task, lba, xfer_len, 0 );
 		}
 		case ISCSI_SCSI_OPCODE_READ16 : {
 			const iscsi_scsi_cdb_read_write_16 *cdb_read_write_16 = (iscsi_scsi_cdb_read_write_16 *) scsi_task->cdb;
 
-			if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-				break;
-
 			lba      = iscsi_get_be64(cdb_read_write_16->lba);
 			xfer_len = iscsi_get_be32(cdb_read_write_16->xfer_len);
 
-			return iscsi_scsi_emu_block_read_write( lun->image, scsi_task, lba, xfer_len, 0 );
-
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_WRITE16 : {
-			const iscsi_scsi_cdb_read_write_16 *cdb_read_write_16 = (iscsi_scsi_cdb_read_write_16 *) scsi_task->cdb;
-
-			if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-				break;
-
-			lba      = iscsi_get_be64(cdb_read_write_16->lba);
-			xfer_len = iscsi_get_be32(cdb_read_write_16->xfer_len);
-
-			return iscsi_scsi_emu_block_read_write( lun->image, scsi_task, lba, xfer_len, ISCSI_SCSI_EMU_BLOCK_FLAGS_WRITE );
-
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_COMPARE_AND_WRITE : {
-			const iscsi_scsi_cdb_cmp_write *cdb_cmp_write = (iscsi_scsi_cdb_cmp_write *) scsi_task->cdb;
-
-			lba      = iscsi_get_be64(cdb_cmp_write->lba);
-			xfer_len = cdb_cmp_write->num_blocks;
-
-			if ( ((cdb_cmp_write->flags & (ISCSI_SCSI_CDB_CMP_WRITE_FLAGS_FUA | ISCSI_SCSI_CDB_CMP_WRITE_FLAGS_DPO)) != 0) || ISCSI_SCSI_CDB_CMP_WRITE_FLAGS_GET_WRPROTECT(cdb_cmp_write->flags) ) {
-				iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_ILLEGAL_REQ, ISCSI_SCSI_ASC_INVALID_FIELD_IN_CDB, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-				return ISCSI_SCSI_TASK_RUN_COMPLETE;
-			}
-
-			if ( xfer_len != 1UL )  {
-				iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_ILLEGAL_REQ, ISCSI_SCSI_ASC_INVALID_FIELD_IN_CDB, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-				return ISCSI_SCSI_TASK_RUN_COMPLETE;
-			}
-
-			if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-				break;
-
-			return iscsi_scsi_emu_block_read_write( lun->image, scsi_task, lba, xfer_len, (ISCSI_SCSI_EMU_BLOCK_FLAGS_WRITE | ISCSI_SCSI_EMU_BLOCK_FLAGS_VERIFY) );
-
-			break;
+			return iscsi_scsi_emu_block_read_write( image, scsi_task, lba, xfer_len, 0 );
 		}
 		case ISCSI_SCSI_OPCODE_READCAPACITY10 : {
-			if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-				break;
-
 			iscsi_scsi_read_capacity_10_parameter_data_packet *buf = (iscsi_scsi_read_capacity_10_parameter_data_packet *) malloc( sizeof(struct iscsi_scsi_read_capacity_10_parameter_data_packet) );
 
 			if ( buf == NULL ) {
@@ -5984,16 +1210,14 @@ static int iscsi_scsi_emu_block_process(iscsi_scsi_task *scsi_task)
 				return ISCSI_SCSI_TASK_RUN_COMPLETE;
 			}
 
-			lba = iscsi_scsi_emu_block_get_count( lun->image ) - 1ULL;
+			lba = iscsi_scsi_emu_block_get_count( image ) - 1ULL;
 
 			if ( lba > 0xFFFFFFFFULL )
 				buf->lba = 0xFFFFFFFFUL; // Minus one does not require endianess conversion
 			else
 				iscsi_put_be32( (uint8_t *) &buf->lba, (uint32_t) lba );
 
-			xfer_len = iscsi_scsi_emu_block_get_size( lun->image );
-
-			iscsi_put_be32( (uint8_t *) &buf->block_len, xfer_len );
+			iscsi_put_be32( (uint8_t *) &buf->block_len, ISCSI_SCSI_EMU_BLOCK_SIZE );
 
 			uint len = scsi_task->len;
 
@@ -6009,122 +1233,41 @@ static int iscsi_scsi_emu_block_process(iscsi_scsi_task *scsi_task)
 		case ISCSI_SCSI_OPCODE_SERVICE_ACTION_IN_16 : {
 			const iscsi_scsi_cdb_service_action_in_16 *cdb_servce_in_action_16 = (iscsi_scsi_cdb_service_action_in_16 *) scsi_task->cdb;
 
-			switch ( ISCSI_SCSI_CDB_SERVICE_ACTION_IN_16_GET_ACTION(cdb_servce_in_action_16->action) ) {
-				case ISCSI_SCSI_CDB_SERVICE_ACTION_IN_16_ACTION_READ_CAPACITY_16 : {
-					if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-						break;
-
-					iscsi_scsi_service_action_in_16_parameter_data_packet *buf = (iscsi_scsi_service_action_in_16_parameter_data_packet *) malloc( sizeof(struct iscsi_scsi_service_action_in_16_parameter_data_packet) );
-
-					if ( buf == NULL ) {
-						iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_NOT_READY, ISCSI_SCSI_ASC_LOGICAL_UNIT_NOT_READY, ISCSI_SCSI_ASCQ_BECOMING_READY );
-
-						return ISCSI_SCSI_TASK_RUN_COMPLETE;
-					}
-
-					lba      = iscsi_scsi_emu_block_get_count( lun->image ) - 1ULL;
-					xfer_len = iscsi_scsi_emu_block_get_size( lun->image );
-
-					iscsi_put_be64( (uint8_t *) &buf->lba, lba );
-					iscsi_put_be32( (uint8_t *) &buf->block_len, xfer_len );
-
-					buf->flags = 0;
-
-					const uint8_t exponent = (uint8_t) iscsi_scsi_emu_block_get_ratio_shift( lun->image );
-
-					buf->exponents = ISCSI_SCSI_SERVICE_ACTION_IN_16_PARAM_DATA_PUT_LBPPB_EXPONENT((exponent <= ISCSI_SCSI_SERVICE_ACTION_IN_16_PARAM_DATA_LBPPB_EXPONENT_MASK) ? exponent : 0U);
-
-					if ( iscsi_scsi_emu_io_type_is_supported( lun->image, ISCSI_SCSI_EMU_IO_TYPE_UNMAP ) )
-						iscsi_put_be16( (uint8_t *) &buf->lbp_lalba, ISCSI_SCSI_SERVICE_ACTION_IN_16_PARAM_DATA_LBPME );
-					else
-						buf->lbp_lalba = 0U;
-
-					buf->reserved[0] = 0ULL;
-					buf->reserved[1] = 0ULL;
-
-					uint len = cdb_servce_in_action_16->alloc_len;
-
-					if ( len > sizeof(struct iscsi_scsi_service_action_in_16_parameter_data_packet) )
-						len = sizeof(struct iscsi_scsi_service_action_in_16_parameter_data_packet); // TODO: Check whether scatter data is required
-
-					scsi_task->buf      = (uint8_t *) buf;
-					scsi_task->xfer_pos = len;
-					scsi_task->status   = ISCSI_SCSI_STATUS_GOOD;
-
-					break;
-				}
-				default : {
-					return ISCSI_SCSI_TASK_RUN_UNKNOWN;
-
-					break;
-				}
+			if ( ISCSI_SCSI_CDB_SERVICE_ACTION_IN_16_GET_ACTION(cdb_servce_in_action_16->action)
+						!= ISCSI_SCSI_CDB_SERVICE_ACTION_IN_16_ACTION_READ_CAPACITY_16 ) {
+				return ISCSI_SCSI_TASK_RUN_UNKNOWN;
 			}
+			iscsi_scsi_service_action_in_16_parameter_data_packet *buf = (iscsi_scsi_service_action_in_16_parameter_data_packet *) malloc( sizeof(struct iscsi_scsi_service_action_in_16_parameter_data_packet) );
 
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_SYNCHRONIZECACHE10 : {
-			const iscsi_scsi_cdb_sync_cache_10 *cdb_sync_cache_10 = (iscsi_scsi_cdb_sync_cache_10 *) scsi_task->cdb;
-
-			if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-				break;
-
-			lba      = iscsi_get_be32(cdb_sync_cache_10->lba);
-			xfer_len = iscsi_get_be16(cdb_sync_cache_10->xfer_len);
-
-			if ( xfer_len == 0UL )
-				xfer_len = (uint32_t) (iscsi_scsi_emu_block_get_count( lun->image ) - lba);
-
-			return iscsi_scsi_emu_block_sync( lun->image, scsi_task, lba, xfer_len );
-
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_SYNCHRONIZECACHE16 : {
-			const iscsi_scsi_cdb_sync_cache_16 *cdb_sync_cache_16 = (iscsi_scsi_cdb_sync_cache_16 *) scsi_task->cdb;
-
-			if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-				break;
-
-			lba      = iscsi_get_be64(cdb_sync_cache_16->lba);
-			xfer_len = iscsi_get_be32(cdb_sync_cache_16->xfer_len);
-
-			if ( xfer_len == 0UL )
-				xfer_len = (uint32_t) (iscsi_scsi_emu_block_get_count( lun->image ) - lba);
-
-			return iscsi_scsi_emu_block_sync( lun->image, scsi_task, lba, xfer_len );
+			if ( buf == NULL ) {
+				iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_NOT_READY, ISCSI_SCSI_ASC_LOGICAL_UNIT_NOT_READY, ISCSI_SCSI_ASCQ_BECOMING_READY );
 
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_UNMAP : {
-			if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-				break;
+				return ISCSI_SCSI_TASK_RUN_COMPLETE;
+			}
 
-			return iscsi_scsi_emu_block_unmap( lun->image, scsi_task );
+			lba      = iscsi_scsi_emu_block_get_count( image ) - 1ULL;
 
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_WRITE_SAME10 : {
-			const iscsi_scsi_cdb_write_same_10 *cdb_write_same_10 = (iscsi_scsi_cdb_write_same_10 *) scsi_task->cdb;
+			iscsi_put_be64( (uint8_t *) &buf->lba, lba );
+			iscsi_put_be32( (uint8_t *) &buf->block_len, ISCSI_SCSI_EMU_BLOCK_SIZE );
 
-			if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-				break;
+			buf->flags = 0;
 
-			lba      = iscsi_get_be32(cdb_write_same_10->lba);
-			xfer_len = iscsi_get_be16(cdb_write_same_10->xfer_len);
+			const uint8_t exponent = ISCSI_SCSI_EMU_BLOCK_DIFF_SHIFT;
 
-			return iscsi_scsi_emu_block_write_same( lun->image, scsi_task, lba, xfer_len, cdb_write_same_10->flags );
+			buf->exponents = ISCSI_SCSI_SERVICE_ACTION_IN_16_PARAM_DATA_PUT_LBPPB_EXPONENT((exponent <= ISCSI_SCSI_SERVICE_ACTION_IN_16_PARAM_DATA_LBPPB_EXPONENT_MASK) ? exponent : 0U);
 
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_WRITE_SAME16 : {
-			const iscsi_scsi_cdb_write_same_16 *cdb_write_same_16 = (iscsi_scsi_cdb_write_same_16 *) scsi_task->cdb;
+			buf->lbp_lalba = 0U;
+			buf->reserved[0] = 0ULL;
+			buf->reserved[1] = 0ULL;
 
-			if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-				break;
+			uint len = cdb_servce_in_action_16->alloc_len;
 
-			lba      = iscsi_get_be64(cdb_write_same_16->lba);
-			xfer_len = iscsi_get_be32(cdb_write_same_16->xfer_len);
+			if ( len > sizeof(struct iscsi_scsi_service_action_in_16_parameter_data_packet) )
+				len = sizeof(struct iscsi_scsi_service_action_in_16_parameter_data_packet); // TODO: Check whether scatter data is required
 
-			return iscsi_scsi_emu_block_write_same( lun->image, scsi_task, lba, xfer_len, cdb_write_same_16->flags );
+			scsi_task->buf      = (uint8_t *) buf;
+			scsi_task->xfer_pos = len;
+			scsi_task->status   = ISCSI_SCSI_STATUS_GOOD;
 
 			break;
 		}
@@ -6139,29 +1282,6 @@ static int iscsi_scsi_emu_block_process(iscsi_scsi_task *scsi_task)
 }
 
 /**
- * @brief Resubmits an iSCSI SCSI task for execution.
- *
- * This function is invoked if an iSCSI
- * SCSI task needs to be resubmitted in
- * case if a prior execution failed and
- * the failure is recoverable.
- *
- * @param[in] user_data Pointer to user_data which is
- * the iSCSI SCSI task to be executed
- * again. May NOT be NULL, so be
- * careful.
- * @return Pointer to passed user data.
- */
-uint8_t *iscsi_scsi_emu_block_resubmit_process_callback(uint8_t *user_data)
-{
-	iscsi_scsi_task *scsi_task = (iscsi_scsi_task *) user_data;
-
-	iscsi_scsi_emu_block_process( scsi_task );
-
-	return user_data;
-}
-
-/**
  * @brief Checks whether provided SCSI CDB allocation length is large enough.
  *
  * This function also sets the SCSI
@@ -6230,73 +1350,6 @@ static size_t iscsi_scsi_emu_pad_scsi_name(uint8_t *buf, const uint8_t *name)
 }
 
 /**
- * @brief Fills in a single Vital Product Data (VPD) SCSI Port Designation Descriptor entry of an INQUIRY operation.
- *
- * Callback function for each element while iterating
- * through the iSCSI SCSI device ports hash map.\n
- * The iteration process is aborted when the
- * remaining allocation length is not enough
- * to hold the current VPD SCSI Port Designation
- * Descriptor.
- *
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] value Value of the key, NULL creates an
- * empty key assignment.
- * @param[in,out] user_data Pointer to a data structure
- * containing the current Vital Product Data
- * (VPD) SCSI Port Designation Descriptor
- * entry, the total length of all VPD SCSI Port
- * Designation Descriptor entries in bytes, the
- * remaining allocation length in bytes. May
- * NOT be NULL, so be careful.
- * @retval -1 Operation failure, ran out of
- * allocation space during traversal.
- * @retval 0 Successful operation, there is enough
- * allocation space to store this
- * reported Vital Product Data (VPD) SCSI Port
- * Designation Descriptor entry.
- */
-int iscsi_scsi_emu_primary_inquiry_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data)
-{
-	iscsi_scsi_emu_primary_inquiry_ports_fill *port_report_fill = (iscsi_scsi_emu_primary_inquiry_ports_fill *) user_data;
-	iscsi_port *port = (iscsi_port *) value;
-
-	if ( (port->flags & ISCSI_PORT_FLAGS_IN_USE) == 0 )
-		return 0;
-
-	const uint port_name_len = (uint) (strlen( (char *) port->name ) + 1U);
-	const uint len = (uint) (sizeof(struct iscsi_scsi_vpd_scsi_port_design_dec_inquiry_data_packet) + sizeof(struct iscsi_scsi_vpd_scsi_target_port_design_dec_inquiry_data_packet) + ISCSI_ALIGN(port_name_len, ISCSI_ALIGN_SIZE));
-
-	port_report_fill->len -= len;
-
-	if ( (int) port_report_fill->len < 0 )
-		return -1;
-
-	iscsi_scsi_vpd_scsi_port_design_dec_inquiry_data_packet *vpd_scsi_port_design_desc_inquiry_data_pkt = port_report_fill->port_entry;
-
-	vpd_scsi_port_design_desc_inquiry_data_pkt->reserved        = 0U;
-	iscsi_put_be16( (uint8_t *) &vpd_scsi_port_design_desc_inquiry_data_pkt->rel_port_id, port->index );
-	vpd_scsi_port_design_desc_inquiry_data_pkt->reserved2       = 0U;
-	vpd_scsi_port_design_desc_inquiry_data_pkt->init_port_len   = 0U;
-	vpd_scsi_port_design_desc_inquiry_data_pkt->reserved3       = 0U;
-	iscsi_put_be16( (uint8_t *) &vpd_scsi_port_design_desc_inquiry_data_pkt->target_desc_len, (uint16_t) (len - sizeof(struct iscsi_scsi_vpd_scsi_port_design_dec_inquiry_data_packet)) );
-
-	iscsi_scsi_vpd_scsi_target_port_design_dec_inquiry_data_packet *vpd_scsi_target_port_design_desc_inquiry_data_pkt = vpd_scsi_port_design_desc_inquiry_data_pkt->target_desc;
-
-	vpd_scsi_target_port_design_desc_inquiry_data_pkt->protocol_id_code_set = ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_PUT_PROTOCOL_ID(ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_PROTOCOL_ID_ISCSI) | ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_PUT_CODE_SET(ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_CODE_SET_UTF8);
-	vpd_scsi_target_port_design_desc_inquiry_data_pkt->flags                = (int8_t) (ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_PUT_TYPE(ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_SCSI_NAME) | ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_PUT_ASSOC(ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_TARGET_PORT) | ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_PIV);
-	vpd_scsi_target_port_design_desc_inquiry_data_pkt->reserved             = 0U;
-	vpd_scsi_target_port_design_desc_inquiry_data_pkt->len                  = (uint8_t) iscsi_scsi_emu_pad_scsi_name( vpd_scsi_target_port_design_desc_inquiry_data_pkt->design, port->name );
-
-	port_report_fill->port_entry  = (iscsi_scsi_vpd_scsi_port_design_dec_inquiry_data_packet *) (((uint8_t *) vpd_scsi_port_design_desc_inquiry_data_pkt) + len);
-	port_report_fill->alloc_len  += len;
-
-	return 0;
-}
-
-/**
  * @brief Executes an inquiry operation on a DNBD3 image.
  *
  * This function also sets the SCSI
@@ -6339,19 +1392,10 @@ static int iscsi_scsi_emu_primary_inquiry(dnbd3_image_t *image, iscsi_scsi_task
 		return -1;
 	}
 
-	iscsi_scsi_lun *lun  = scsi_task->lun;
-	iscsi_device *device = lun->device;
-	iscsi_port *port     = scsi_task->target_port;
-
 	if ( evpd != 0 ) {
 		iscsi_scsi_vpd_page_inquiry_data_packet *vpd_page_inquiry_data_pkt = (iscsi_scsi_vpd_page_inquiry_data_packet *) std_inquiry_data_pkt;
-		int32_t scsi_device_type                                           = iscsi_config_get( (uint8_t *) image->name, ISCSI_GLOBALS_CONFIG_TYPE_SCSI_DEVICE_TYPE );
 		uint alloc_len;
-
-		if ( scsi_device_type < 0L )
-			scsi_device_type = iscsi_config_get( NULL, ISCSI_GLOBALS_CONFIG_TYPE_SCSI_DEVICE_TYPE );
-
-		const uint8_t pti = ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PUT_PERIPHERAL_TYPE(scsi_device_type) | ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PUT_PERIPHERAL_ID(ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PERIPHERAL_ID_POSSIBLE);
+		const uint8_t pti = ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PUT_PERIPHERAL_TYPE(ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PERIPHERAL_TYPE_DIRECT) | ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PUT_PERIPHERAL_ID(ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PERIPHERAL_ID_POSSIBLE);
 
 		vpd_page_inquiry_data_pkt->peripheral_type_id        = pti;
 		vpd_page_inquiry_data_pkt->page_code                 = (uint8_t) pc;
@@ -6361,20 +1405,11 @@ static int iscsi_scsi_emu_primary_inquiry(dnbd3_image_t *image, iscsi_scsi_task
 				vpd_page_inquiry_data_pkt->params[0] = ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PAGE_CODE_SUPPORTED_VPD_PAGES;
 				vpd_page_inquiry_data_pkt->params[1] = ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PAGE_CODE_UNIT_SERIAL_NUMBER;
 				vpd_page_inquiry_data_pkt->params[2] = ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PAGE_CODE_DEVICE_ID;
-				vpd_page_inquiry_data_pkt->params[3] = ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PAGE_CODE_MANAGEMENT_NETWORK_ADDRS;
-				vpd_page_inquiry_data_pkt->params[4] = ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PAGE_CODE_EXTENDED_INQUIRY_DATA;
-				vpd_page_inquiry_data_pkt->params[5] = ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PAGE_CODE_MODE_PAGE_POLICY;
-				vpd_page_inquiry_data_pkt->params[6] = ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PAGE_CODE_SCSI_PORTS;
-				vpd_page_inquiry_data_pkt->params[7] = ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PAGE_CODE_BLOCK_LIMITS;
-				vpd_page_inquiry_data_pkt->params[8] = ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PAGE_CODE_BLOCK_DEV_CHARS;
+				vpd_page_inquiry_data_pkt->params[3] = ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PAGE_CODE_EXTENDED_INQUIRY_DATA;
+				vpd_page_inquiry_data_pkt->params[4] = ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PAGE_CODE_BLOCK_LIMITS;
+				vpd_page_inquiry_data_pkt->params[5] = ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PAGE_CODE_BLOCK_DEV_CHARS;
 
-				alloc_len = 9U;
-
-				if ( iscsi_scsi_emu_io_type_is_supported( image, ISCSI_SCSI_EMU_IO_TYPE_UNMAP ) ) {
-					vpd_page_inquiry_data_pkt->params[9] = ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PAGE_CODE_THIN_PROVISION;
-
-					alloc_len++;
-				}
+				alloc_len = 6U;
 
 				iscsi_put_be16( (uint8_t *) &vpd_page_inquiry_data_pkt->alloc_len, (uint16_t) alloc_len );
 
@@ -6398,8 +1433,9 @@ static int iscsi_scsi_emu_primary_inquiry(dnbd3_image_t *image, iscsi_scsi_task
 				break;
 			}
 			case ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PAGE_CODE_DEVICE_ID : {
-				const uint dev_name_len  = (uint) (strlen( (char *) device->name ) + 1U);
-				const uint port_name_len = (uint) (strlen( (char *) port->name ) + 1U);
+				const char *port_name = "Horst";
+				const uint dev_name_len  = (uint) (strlen( image->name ) + 1U);
+				const uint port_name_len = (uint) (strlen( port_name ) + 1U);
 
 				alloc_len  = (sizeof(struct iscsi_scsi_vpd_page_design_desc_inquiry_data_packet) + sizeof(struct iscsi_scsi_vpd_page_design_desc_ieee_naa_ext_inquiry_data_packet)); // 64-bit IEEE NAA Extended
 				alloc_len += (sizeof(struct iscsi_scsi_vpd_page_design_desc_inquiry_data_packet) + sizeof(struct iscsi_scsi_vpd_page_design_desc_t10_vendor_id_inquiry_data_packet)); // T10 Vendor ID
@@ -6417,7 +1453,7 @@ static int iscsi_scsi_emu_primary_inquiry(dnbd3_image_t *image, iscsi_scsi_task
 
 				iscsi_scsi_vpd_page_design_desc_inquiry_data_packet *vpd_page_design_desc_inquiry_data_pkt = (iscsi_scsi_vpd_page_design_desc_inquiry_data_packet *) vpd_page_inquiry_data_pkt->params;
 
-				vpd_page_design_desc_inquiry_data_pkt->protocol_id_code_set = ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_CODE_SET(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_CODE_SET_BINARY) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_PROTOCOL_ID(device->protocol_id);
+				vpd_page_design_desc_inquiry_data_pkt->protocol_id_code_set = ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_CODE_SET(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_CODE_SET_BINARY) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_PROTOCOL_ID(ISCSI_DEFAULT_PROTOCOL_ID);
 				vpd_page_design_desc_inquiry_data_pkt->flags                = (int8_t) (ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PUT_TYPE(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_NAA) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PUT_ASSOC(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_LOGICAL_UNIT) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PIV);
 				vpd_page_design_desc_inquiry_data_pkt->reserved             = 0U;
 				vpd_page_design_desc_inquiry_data_pkt->len                  = sizeof(struct iscsi_scsi_vpd_page_design_desc_ieee_naa_ext_inquiry_data_packet);
@@ -6427,7 +1463,7 @@ static int iscsi_scsi_emu_primary_inquiry(dnbd3_image_t *image, iscsi_scsi_task
 				alloc_len = (sizeof(struct iscsi_scsi_vpd_page_design_desc_inquiry_data_packet) + sizeof(struct iscsi_scsi_vpd_page_design_desc_ieee_naa_ext_inquiry_data_packet));
 
 				vpd_page_design_desc_inquiry_data_pkt = (iscsi_scsi_vpd_page_design_desc_inquiry_data_packet *) (((uint8_t *) vpd_page_design_desc_inquiry_data_pkt) + alloc_len);
-				vpd_page_design_desc_inquiry_data_pkt->protocol_id_code_set = ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_CODE_SET(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_CODE_SET_ASCII) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_PROTOCOL_ID(device->protocol_id);
+				vpd_page_design_desc_inquiry_data_pkt->protocol_id_code_set = ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_CODE_SET(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_CODE_SET_ASCII) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_PROTOCOL_ID(ISCSI_DEFAULT_PROTOCOL_ID);
 				vpd_page_design_desc_inquiry_data_pkt->flags                = (int8_t) (ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PUT_TYPE(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_T10_VENDOR_ID) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PUT_ASSOC(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_LOGICAL_UNIT) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PIV);
 				vpd_page_design_desc_inquiry_data_pkt->reserved             = 0U;
 				vpd_page_design_desc_inquiry_data_pkt->len                  = sizeof(struct iscsi_scsi_vpd_page_design_desc_t10_vendor_id_inquiry_data_packet);
@@ -6441,23 +1477,23 @@ static int iscsi_scsi_emu_primary_inquiry(dnbd3_image_t *image, iscsi_scsi_task
 				alloc_len += (sizeof(struct iscsi_scsi_vpd_page_design_desc_inquiry_data_packet) + sizeof(struct iscsi_scsi_vpd_page_design_desc_t10_vendor_id_inquiry_data_packet));
 
 				vpd_page_design_desc_inquiry_data_pkt = (iscsi_scsi_vpd_page_design_desc_inquiry_data_packet *) (((uint8_t *) vpd_page_design_desc_inquiry_data_pkt) + (sizeof(struct iscsi_scsi_vpd_page_design_desc_inquiry_data_packet) + sizeof(struct iscsi_scsi_vpd_page_design_desc_t10_vendor_id_inquiry_data_packet)));
-				vpd_page_design_desc_inquiry_data_pkt->protocol_id_code_set = ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_CODE_SET(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_CODE_SET_UTF8) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_PROTOCOL_ID(device->protocol_id);
+				vpd_page_design_desc_inquiry_data_pkt->protocol_id_code_set = ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_CODE_SET(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_CODE_SET_UTF8) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_PROTOCOL_ID(ISCSI_DEFAULT_PROTOCOL_ID);
 				vpd_page_design_desc_inquiry_data_pkt->flags                = (int8_t) (ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PUT_TYPE(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_SCSI_NAME) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PUT_ASSOC(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_TARGET_DEVICE) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PIV);
 				vpd_page_design_desc_inquiry_data_pkt->reserved             = 0U;
-				vpd_page_design_desc_inquiry_data_pkt->len                  = (uint8_t) iscsi_scsi_emu_pad_scsi_name( vpd_page_design_desc_inquiry_data_pkt->desc, device->name );
+				vpd_page_design_desc_inquiry_data_pkt->len                  = (uint8_t) iscsi_scsi_emu_pad_scsi_name( vpd_page_design_desc_inquiry_data_pkt->desc, (const uint8_t*)image->name );
 
 				alloc_len += (uint) (sizeof(struct iscsi_scsi_vpd_page_design_desc_inquiry_data_packet) + vpd_page_design_desc_inquiry_data_pkt->len);
 
 				vpd_page_design_desc_inquiry_data_pkt = (iscsi_scsi_vpd_page_design_desc_inquiry_data_packet *) (((uint8_t *) vpd_page_design_desc_inquiry_data_pkt) + (sizeof(struct iscsi_scsi_vpd_page_design_desc_inquiry_data_packet) + vpd_page_design_desc_inquiry_data_pkt->len));
-				vpd_page_design_desc_inquiry_data_pkt->protocol_id_code_set = ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_CODE_SET(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_CODE_SET_UTF8) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_PROTOCOL_ID(device->protocol_id);
+				vpd_page_design_desc_inquiry_data_pkt->protocol_id_code_set = ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_CODE_SET(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_CODE_SET_UTF8) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_PROTOCOL_ID(ISCSI_DEFAULT_PROTOCOL_ID);
 				vpd_page_design_desc_inquiry_data_pkt->flags                = (int8_t) (ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PUT_TYPE(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_SCSI_NAME) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PUT_ASSOC(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_TARGET_PORT) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PIV);
 				vpd_page_design_desc_inquiry_data_pkt->reserved             = 0U;
-				vpd_page_design_desc_inquiry_data_pkt->len                  = (uint8_t) iscsi_scsi_emu_pad_scsi_name( vpd_page_design_desc_inquiry_data_pkt->desc, port->name );
+				vpd_page_design_desc_inquiry_data_pkt->len                  = (uint8_t) iscsi_scsi_emu_pad_scsi_name( vpd_page_design_desc_inquiry_data_pkt->desc, (const uint8_t*)port_name );
 
 				alloc_len += (uint) (sizeof(struct iscsi_scsi_vpd_page_design_desc_inquiry_data_packet) + vpd_page_design_desc_inquiry_data_pkt->len);
 
 				vpd_page_design_desc_inquiry_data_pkt = (iscsi_scsi_vpd_page_design_desc_inquiry_data_packet *) (((uint8_t *) vpd_page_design_desc_inquiry_data_pkt) + (sizeof(struct iscsi_scsi_vpd_page_design_desc_inquiry_data_packet) + vpd_page_design_desc_inquiry_data_pkt->len));
-				vpd_page_design_desc_inquiry_data_pkt->protocol_id_code_set = ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_CODE_SET(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_CODE_SET_BINARY) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_PROTOCOL_ID(device->protocol_id);
+				vpd_page_design_desc_inquiry_data_pkt->protocol_id_code_set = ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_CODE_SET(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_CODE_SET_BINARY) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_PROTOCOL_ID(ISCSI_DEFAULT_PROTOCOL_ID);
 				vpd_page_design_desc_inquiry_data_pkt->flags                = (int8_t) (ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PUT_TYPE(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_REL_TARGET_PORT) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PUT_ASSOC(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_TARGET_PORT) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PIV);
 				vpd_page_design_desc_inquiry_data_pkt->reserved             = 0U;
 				vpd_page_design_desc_inquiry_data_pkt->len                  = sizeof(struct iscsi_scsi_vpd_page_design_desc_rel_target_port_inquiry_data_packet);
@@ -6465,12 +1501,12 @@ static int iscsi_scsi_emu_primary_inquiry(dnbd3_image_t *image, iscsi_scsi_task
 				iscsi_scsi_vpd_page_design_desc_rel_target_port_inquiry_data_packet *vpd_page_design_desc_rel_target_port_inquiry_data_pkt = (iscsi_scsi_vpd_page_design_desc_rel_target_port_inquiry_data_packet *) vpd_page_design_desc_inquiry_data_pkt->desc;
 
 				vpd_page_design_desc_rel_target_port_inquiry_data_pkt->reserved = 0U;
-				iscsi_put_be16( (uint8_t *) &vpd_page_design_desc_rel_target_port_inquiry_data_pkt->index, port->index );
+				iscsi_put_be16( (uint8_t *) &vpd_page_design_desc_rel_target_port_inquiry_data_pkt->index, 1 );
 
 				alloc_len += (sizeof(struct iscsi_scsi_vpd_page_design_desc_inquiry_data_packet) + sizeof(struct iscsi_scsi_vpd_page_design_desc_rel_target_port_inquiry_data_packet));
 
 				vpd_page_design_desc_inquiry_data_pkt = (iscsi_scsi_vpd_page_design_desc_inquiry_data_packet *) (((uint8_t *) vpd_page_design_desc_inquiry_data_pkt) +  (sizeof(struct iscsi_scsi_vpd_page_design_desc_inquiry_data_packet) + sizeof(struct iscsi_scsi_vpd_page_design_desc_rel_target_port_inquiry_data_packet)));
-				vpd_page_design_desc_inquiry_data_pkt->protocol_id_code_set = ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_CODE_SET(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_CODE_SET_BINARY) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_PROTOCOL_ID(device->protocol_id);
+				vpd_page_design_desc_inquiry_data_pkt->protocol_id_code_set = ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_CODE_SET(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_CODE_SET_BINARY) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_PROTOCOL_ID(ISCSI_DEFAULT_PROTOCOL_ID);
 				vpd_page_design_desc_inquiry_data_pkt->flags                = (int8_t) (ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PUT_TYPE(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_TARGET_PORT_GROUP) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PUT_ASSOC(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_TARGET_PORT) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PIV);
 				vpd_page_design_desc_inquiry_data_pkt->reserved             = 0U;
 				vpd_page_design_desc_inquiry_data_pkt->len                  = sizeof(struct iscsi_scsi_vpd_page_design_desc_target_port_group_inquiry_data_packet);
@@ -6483,15 +1519,15 @@ static int iscsi_scsi_emu_primary_inquiry(dnbd3_image_t *image, iscsi_scsi_task
 				alloc_len += (sizeof(struct iscsi_scsi_vpd_page_design_desc_inquiry_data_packet) + sizeof(struct iscsi_scsi_vpd_page_design_desc_target_port_group_inquiry_data_packet));
 
 				vpd_page_design_desc_inquiry_data_pkt = (iscsi_scsi_vpd_page_design_desc_inquiry_data_packet *) (((uint8_t *) vpd_page_design_desc_inquiry_data_pkt) +  (sizeof(struct iscsi_scsi_vpd_page_design_desc_inquiry_data_packet) + sizeof(struct iscsi_scsi_vpd_page_design_desc_target_port_group_inquiry_data_packet)));
-				vpd_page_design_desc_inquiry_data_pkt->protocol_id_code_set = ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_CODE_SET(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_CODE_SET_BINARY) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_PROTOCOL_ID(device->protocol_id);
+				vpd_page_design_desc_inquiry_data_pkt->protocol_id_code_set = ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_CODE_SET(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_CODE_SET_BINARY) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_PUT_PROTOCOL_ID(ISCSI_DEFAULT_PROTOCOL_ID);
 				vpd_page_design_desc_inquiry_data_pkt->flags                = (int8_t) (ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PUT_TYPE(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_LOGICAL_UNIT_GROUP) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PUT_ASSOC(ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_LOGICAL_UNIT) | ISCSI_SCSI_VPD_PAGE_DESIGN_DESC_INQUIRY_DATA_FLAGS_PIV);
 				vpd_page_design_desc_inquiry_data_pkt->reserved             = 0U;
 				vpd_page_design_desc_inquiry_data_pkt->len                  = sizeof(struct iscsi_scsi_vpd_page_design_desc_logical_unit_group_inquiry_data_packet);
 
-				iscsi_scsi_vpd_page_design_desc_logical_unit_group_inquiry_data_packet *vpd_page_design_desc_logical_unit_group_inquiry_data_pkt = (iscsi_scsi_vpd_page_design_desc_logical_unit_group_inquiry_data_packet *) vpd_page_design_desc_inquiry_data_pkt->desc;
+				iscsi_scsi_vpd_page_design_desc_logical_unit_group_inquiry_data_packet *vpd_page_design_desc_logical_unit_group_inquiry_data_pkt = vpd_page_design_desc_inquiry_data_pkt->desc;
 
 				vpd_page_design_desc_logical_unit_group_inquiry_data_pkt->reserved = 0U;
-				iscsi_put_be16( (uint8_t *) &vpd_page_design_desc_logical_unit_group_inquiry_data_pkt->id, (uint16_t) device->id );
+				iscsi_put_be16( (uint8_t *) &vpd_page_design_desc_logical_unit_group_inquiry_data_pkt->id, (uint16_t) ISCSI_DEFAULT_DEVICE_ID );
 
 				alloc_len += (sizeof(struct iscsi_scsi_vpd_page_design_desc_inquiry_data_packet) + sizeof(struct iscsi_scsi_vpd_page_design_desc_logical_unit_group_inquiry_data_packet));
 
@@ -6531,43 +1567,6 @@ static int iscsi_scsi_emu_primary_inquiry(dnbd3_image_t *image, iscsi_scsi_task
 
 				break;
 			}
-			case ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PAGE_CODE_MANAGEMENT_NETWORK_ADDRS : {
-				alloc_len = 0U;
-
-				vpd_page_inquiry_data_pkt->alloc_len = 0U;
-
-				break;
-			}
-			case ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PAGE_CODE_MODE_PAGE_POLICY : {
-				iscsi_scsi_vpd_mode_page_policy_desc_inquiry_data_packet *vpd_page_mode_page_policy_desc_inquiry_data_pkt = (iscsi_scsi_vpd_mode_page_policy_desc_inquiry_data_packet *) vpd_page_inquiry_data_pkt->params;
-
-				alloc_len = sizeof(struct iscsi_scsi_vpd_mode_page_policy_desc_inquiry_data_packet);
-
-				vpd_page_mode_page_policy_desc_inquiry_data_pkt->page_code     = ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_POLICY_PAGE_CODE_MASK;
-				vpd_page_mode_page_policy_desc_inquiry_data_pkt->sub_page_code = 0xFFU;
-				vpd_page_mode_page_policy_desc_inquiry_data_pkt->flags         = 0U;
-				vpd_page_mode_page_policy_desc_inquiry_data_pkt->reserved      = 0U;
-
-				iscsi_put_be16( (uint8_t *) &vpd_page_inquiry_data_pkt->alloc_len, (uint16_t) alloc_len );
-
-				break;
-			}
-			case ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PAGE_CODE_SCSI_PORTS : {
-				iscsi_scsi_emu_primary_inquiry_ports_fill port_report_fill = {(iscsi_scsi_vpd_scsi_port_design_dec_inquiry_data_packet *) vpd_page_inquiry_data_pkt->params, 0U, (uint) (len - sizeof(struct iscsi_scsi_vpd_page_inquiry_data_packet))};
-				const int rc = iscsi_hashmap_iterate( device->ports, iscsi_scsi_emu_primary_inquiry_callback, (uint8_t *) &port_report_fill );
-
-				if ( rc < 0 ) {
-					iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_ILLEGAL_REQ, ISCSI_SCSI_ASC_INVALID_FIELD_IN_CDB, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-					return -1;
-				}
-
-				alloc_len = port_report_fill.alloc_len;
-
-				iscsi_put_be16( (uint8_t *) &vpd_page_inquiry_data_pkt->alloc_len, (uint16_t) alloc_len );
-
-				break;
-			}
 			case ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PAGE_CODE_BLOCK_LIMITS : {
 				iscsi_scsi_vpd_page_block_limits_inquiry_data_packet *vpd_page_block_limits_inquiry_data_pkt = (iscsi_scsi_vpd_page_block_limits_inquiry_data_packet *) vpd_page_inquiry_data_pkt->params;
 
@@ -6581,30 +1580,17 @@ static int iscsi_scsi_emu_primary_inquiry(dnbd3_image_t *image, iscsi_scsi_task
 
 				vpd_page_block_limits_inquiry_data_pkt->flags = 0;
 
-				uint32_t blocks = (ISCSI_SCSI_EMU_MAX_XFER_LEN >> iscsi_scsi_emu_block_get_size_shift( image ));
-
-				if ( blocks > 255UL )
-					blocks = 255UL;
+				uint32_t blocks = (ISCSI_MAX_DS_SIZE  / ISCSI_SCSI_EMU_BLOCK_SIZE);
 
 				vpd_page_block_limits_inquiry_data_pkt->max_cmp_write_len = (uint8_t) blocks;
 
-				uint32_t optimal_blocks = ISCSI_SCSI_EMU_BLOCK_SIZE >> iscsi_scsi_emu_block_get_size_shift( image );
-
-				if ( optimal_blocks == 0UL )
-					optimal_blocks = 1UL;
-
-				iscsi_put_be16( (uint8_t *) &vpd_page_block_limits_inquiry_data_pkt->optimal_granularity_xfer_len, (uint16_t) optimal_blocks );
+				iscsi_put_be16( (uint8_t *) &vpd_page_block_limits_inquiry_data_pkt->optimal_granularity_xfer_len, (uint16_t) blocks );
 				iscsi_put_be32( (uint8_t *) &vpd_page_block_limits_inquiry_data_pkt->max_xfer_len, blocks );
 				iscsi_put_be32( (uint8_t *) &vpd_page_block_limits_inquiry_data_pkt->optimal_xfer_len, blocks );
 				vpd_page_block_limits_inquiry_data_pkt->max_prefetch_len = 0UL;
 
-				if ( iscsi_scsi_emu_io_type_is_supported( image, ISCSI_SCSI_EMU_IO_TYPE_UNMAP ) ) {
-					iscsi_put_be32( (uint8_t *) &vpd_page_block_limits_inquiry_data_pkt->max_unmap_lba_cnt, ISCSI_SCSI_EMU_MAX_UNMAP_LBA_COUNT );
-					iscsi_put_be32( (uint8_t *) &vpd_page_block_limits_inquiry_data_pkt->max_unmap_block_desc_cnt, ISCSI_SCSI_EMU_MAX_UNMAP_BLOCK_DESC_COUNT );
-				} else {
-					vpd_page_block_limits_inquiry_data_pkt->max_unmap_lba_cnt = 0UL;
-					vpd_page_block_limits_inquiry_data_pkt->max_unmap_block_desc_cnt = 0UL;
-				}
+				vpd_page_block_limits_inquiry_data_pkt->max_unmap_lba_cnt = 0UL;
+				vpd_page_block_limits_inquiry_data_pkt->max_unmap_block_desc_cnt = 0UL;
 
 				vpd_page_block_limits_inquiry_data_pkt->optimal_unmap_granularity        = 0UL;
 				vpd_page_block_limits_inquiry_data_pkt->unmap_granularity_align_ugavalid = 0UL;
@@ -6628,7 +1614,7 @@ static int iscsi_scsi_emu_primary_inquiry(dnbd3_image_t *image, iscsi_scsi_task
 
 				alloc_len = sizeof(struct iscsi_scsi_vpd_page_block_dev_chars_inquiry_data_packet);
 
-				vpd_page_block_dev_chars_inquiry_data_pkt->medium_rotation_rate = (iscsi_scsi_emu_io_type_is_supported( image, ISCSI_SCSI_EMU_IO_TYPE_NO_ROTATION ) ? ISCSI_SCSI_VPD_PAGE_BLOCK_DEV_CHARS_INQUIRY_DATA_MEDIUM_ROTATION_RATE_NONE : ISCSI_SCSI_VPD_PAGE_BLOCK_DEV_CHARS_INQUIRY_DATA_MEDIUM_ROTATION_RATE_NOT_REPORTED);
+				vpd_page_block_dev_chars_inquiry_data_pkt->medium_rotation_rate = ISCSI_SCSI_VPD_PAGE_BLOCK_DEV_CHARS_INQUIRY_DATA_MEDIUM_ROTATION_RATE_NONE;
 				vpd_page_block_dev_chars_inquiry_data_pkt->product_type         = ISCSI_SCSI_VPD_PAGE_BLOCK_DEV_CHARS_INQUIRY_DATA_PRODUCT_TYPE_NOT_INDICATED;
 				vpd_page_block_dev_chars_inquiry_data_pkt->flags                = ISCSI_SCSI_VPD_PAGE_BLOCK_DEV_CHARS_INQUIRY_DATA_FLAGS_PUT_NOMINAL_FORM_FACTOR(ISCSI_SCSI_VPD_PAGE_BLOCK_DEV_CHARS_INQUIRY_DATA_FLAGS_NOMINAL_FORM_FACTOR_NOT_REPORTED);
 				vpd_page_block_dev_chars_inquiry_data_pkt->support_flags        = 0U;
@@ -6646,28 +1632,6 @@ static int iscsi_scsi_emu_primary_inquiry(dnbd3_image_t *image, iscsi_scsi_task
 
 				break;
 			}
-			case ISCSI_SCSI_VPD_PAGE_INQUIRY_DATA_PAGE_CODE_THIN_PROVISION : {
-				if ( !iscsi_scsi_emu_io_type_is_supported( image, ISCSI_SCSI_EMU_IO_TYPE_UNMAP ) ) {
-					scsi_task->xfer_pos = 0UL;
-
-					iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_NO_SENSE, ISCSI_SCSI_ASC_NO_ADDITIONAL_SENSE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-					return -1;
-				}
-
-				iscsi_scsi_vpd_page_thin_provision_inquiry_data_packet *vpd_page_thin_provision_inquiry_data_pkt = (iscsi_scsi_vpd_page_thin_provision_inquiry_data_packet *) vpd_page_inquiry_data_pkt->params;
-
-				alloc_len = sizeof(struct iscsi_scsi_vpd_page_thin_provision_inquiry_data_packet);
-
-				vpd_page_thin_provision_inquiry_data_pkt->threshold_exponent = 0U;
-				vpd_page_thin_provision_inquiry_data_pkt->flags              = (int8_t) ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_FLAGS_LBPU;
-				vpd_page_thin_provision_inquiry_data_pkt->provision_type     = ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_PUT_PROVISION_TYPE(ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_PROVISION_TYPE_THIN_PROVISIONING);
-				vpd_page_thin_provision_inquiry_data_pkt->reserved           = 0U;
-
-				iscsi_put_be16( (uint8_t *) &vpd_page_inquiry_data_pkt->alloc_len, (uint16_t) alloc_len );
-
-				break;
-			}
 			default : {
 				scsi_task->xfer_pos = 0UL;
 
@@ -6680,138 +1644,85 @@ static int iscsi_scsi_emu_primary_inquiry(dnbd3_image_t *image, iscsi_scsi_task
 		}
 
 		return (int) (alloc_len + sizeof(struct iscsi_scsi_vpd_page_inquiry_data_packet));
-	} else {
-		int32_t scsi_device_type = iscsi_config_get( (uint8_t *) image->name, ISCSI_GLOBALS_CONFIG_TYPE_SCSI_DEVICE_TYPE );
-		uint alloc_len;
-
-		if ( scsi_device_type < 0L )
-			scsi_device_type = iscsi_config_get( NULL, ISCSI_GLOBALS_CONFIG_TYPE_SCSI_DEVICE_TYPE );
-
-		const uint8_t pti = ISCSI_SCSI_BASIC_INQUIRY_DATA_PUT_PERIPHERAL_TYPE(scsi_device_type) | ISCSI_SCSI_BASIC_INQUIRY_DATA_PUT_PERIPHERAL_ID(ISCSI_SCSI_BASIC_INQUIRY_DATA_PERIPHERAL_ID_POSSIBLE);
-
-		std_inquiry_data_pkt->basic_inquiry.peripheral_type_id        = pti;
-		std_inquiry_data_pkt->basic_inquiry.peripheral_type_mod_flags = (int8_t) (iscsi_scsi_emu_io_type_is_supported( image, ISCSI_SCSI_EMU_IO_TYPE_REMOVABLE ) ? ISCSI_SCSI_BASIC_INQUIRY_DATA_PERIPHERAL_TYPE_MOD_FLAGS_REMOVABLE_MEDIA : 0);
-		std_inquiry_data_pkt->basic_inquiry.version                   = ISCSI_SCSI_BASIC_INQUIRY_DATA_PUT_VERSION_ANSI(ISCSI_SCSI_BASIC_INQUIRY_DATA_VERSION_ANSI_SPC3);
-		std_inquiry_data_pkt->basic_inquiry.response_data_fmt_flags   = ISCSI_SCSI_BASIC_INQUIRY_DATA_PUT_RESPONSE_DATA_FMT_FLAGS(ISCSI_SCSI_BASIC_INQUIRY_DATA_RESPONSE_DATA_FMT_FLAGS_SCSI_2) | ISCSI_SCSI_BASIC_INQUIRY_DATA_RESPONSE_DATA_FMT_FLAGS_HISUP;
-
-		std_inquiry_data_pkt->tpgs_flags     = 0U;
-		std_inquiry_data_pkt->services_flags = ISCSI_SCSI_STD_INQUIRY_DATA_SERVICES_FLAGS_MULTIP;
-		std_inquiry_data_pkt->flags          = ISCSI_SCSI_STD_INQUIRY_DATA_FLAGS_COMMAND_QUEUE;
-
-		iscsi_strcpy_pad( (char *) std_inquiry_data_pkt->vendor_id, ISCSI_SCSI_STD_INQUIRY_DATA_DISK_VENDOR_ID, sizeof(std_inquiry_data_pkt->vendor_id), ' ' );
-		iscsi_strcpy_pad( (char *) std_inquiry_data_pkt->product_id, image->name, sizeof(std_inquiry_data_pkt->product_id), ' ' );
-
-		char image_rev[sizeof(std_inquiry_data_pkt->product_rev_level) + 1];
-
-		sprintf( image_rev, "%04" PRIX16, image->rid );
-		iscsi_strcpy_pad( (char *) std_inquiry_data_pkt->product_rev_level, image_rev, sizeof(std_inquiry_data_pkt->product_rev_level), ' ' );
-
-		uint add_len = (sizeof(struct iscsi_scsi_std_inquiry_data_packet) - sizeof(struct iscsi_scsi_basic_inquiry_data_packet));
-		iscsi_scsi_ext_inquiry_data_packet *ext_inquiry_data_pkt = (iscsi_scsi_ext_inquiry_data_packet *) std_inquiry_data_pkt;
+	}
 
-		if ( len >= ISCSI_NEXT_OFFSET(iscsi_scsi_ext_inquiry_data_packet, vendor_spec) ) {
-			iscsi_strcpy_pad( (char *) ext_inquiry_data_pkt->vendor_spec, ISCSI_SCSI_EXT_INQUIRY_DATA_VENDOR_SPEC_ID, sizeof(ext_inquiry_data_pkt->vendor_spec), ' ' );
+	const uint8_t pti = ISCSI_SCSI_BASIC_INQUIRY_DATA_PUT_PERIPHERAL_TYPE(ISCSI_SCSI_BASIC_INQUIRY_DATA_PERIPHERAL_TYPE_DIRECT) | ISCSI_SCSI_BASIC_INQUIRY_DATA_PUT_PERIPHERAL_ID(ISCSI_SCSI_BASIC_INQUIRY_DATA_PERIPHERAL_ID_POSSIBLE);
 
-			add_len += sizeof(ext_inquiry_data_pkt->vendor_spec);
-		}
+	std_inquiry_data_pkt->basic_inquiry.peripheral_type_id        = pti;
+	std_inquiry_data_pkt->basic_inquiry.peripheral_type_mod_flags = 0;
+	std_inquiry_data_pkt->basic_inquiry.version                   = ISCSI_SCSI_BASIC_INQUIRY_DATA_PUT_VERSION_ANSI(ISCSI_SCSI_BASIC_INQUIRY_DATA_VERSION_ANSI_SPC3);
+	std_inquiry_data_pkt->basic_inquiry.response_data_fmt_flags   = ISCSI_SCSI_BASIC_INQUIRY_DATA_PUT_RESPONSE_DATA_FMT_FLAGS(ISCSI_SCSI_BASIC_INQUIRY_DATA_RESPONSE_DATA_FMT_FLAGS_SCSI_2) | ISCSI_SCSI_BASIC_INQUIRY_DATA_RESPONSE_DATA_FMT_FLAGS_HISUP;
 
-		if ( len >= ISCSI_NEXT_OFFSET(iscsi_scsi_ext_inquiry_data_packet, flags) ) {
-			ext_inquiry_data_pkt->flags = 0;
+	std_inquiry_data_pkt->tpgs_flags     = 0U;
+	std_inquiry_data_pkt->services_flags = ISCSI_SCSI_STD_INQUIRY_DATA_SERVICES_FLAGS_MULTIP;
+	std_inquiry_data_pkt->flags          = ISCSI_SCSI_STD_INQUIRY_DATA_FLAGS_COMMAND_QUEUE;
 
-			add_len += sizeof(ext_inquiry_data_pkt->flags);
-		}
+	iscsi_strcpy_pad( (char *) std_inquiry_data_pkt->vendor_id, ISCSI_SCSI_STD_INQUIRY_DATA_DISK_VENDOR_ID, sizeof(std_inquiry_data_pkt->vendor_id), ' ' );
+	iscsi_strcpy_pad( (char *) std_inquiry_data_pkt->product_id, image->name, sizeof(std_inquiry_data_pkt->product_id), ' ' );
 
-		if ( len >= ISCSI_NEXT_OFFSET(iscsi_scsi_ext_inquiry_data_packet, reserved) ) {
-			ext_inquiry_data_pkt->reserved = 0U;
+	char image_rev[sizeof(std_inquiry_data_pkt->product_rev_level) + 1];
 
-			add_len += sizeof(ext_inquiry_data_pkt->reserved);
-		}
+	sprintf( image_rev, "%04" PRIX16, image->rid );
+	iscsi_strcpy_pad( (char *) std_inquiry_data_pkt->product_rev_level, image_rev, sizeof(std_inquiry_data_pkt->product_rev_level), ' ' );
 
-		if ( len >= ISCSI_NEXT_OFFSET(iscsi_scsi_ext_inquiry_data_packet, version_desc[0]) ) {
-			iscsi_put_be16( (uint8_t *) &ext_inquiry_data_pkt->version_desc[0], ISCSI_SCSI_EXT_INQUIRY_DATA_VERSION_DESC_ISCSI_NO_VERSION );
+	uint add_len = (sizeof(struct iscsi_scsi_std_inquiry_data_packet) - sizeof(struct iscsi_scsi_basic_inquiry_data_packet));
+	iscsi_scsi_ext_inquiry_data_packet *ext_inquiry_data_pkt = (iscsi_scsi_ext_inquiry_data_packet *) std_inquiry_data_pkt;
 
-			add_len += sizeof(ext_inquiry_data_pkt->version_desc[0]);
-		}
+	if ( len >= ISCSI_NEXT_OFFSET(iscsi_scsi_ext_inquiry_data_packet, vendor_spec) ) {
+		iscsi_strcpy_pad( (char *) ext_inquiry_data_pkt->vendor_spec, ISCSI_SCSI_EXT_INQUIRY_DATA_VENDOR_SPEC_ID, sizeof(ext_inquiry_data_pkt->vendor_spec), ' ' );
 
-		if ( len >= ISCSI_NEXT_OFFSET(iscsi_scsi_ext_inquiry_data_packet, version_desc[1]) ) {
-			iscsi_put_be16( (uint8_t *) &ext_inquiry_data_pkt->version_desc[1], ISCSI_SCSI_EXT_INQUIRY_DATA_VERSION_DESC_SPC3_NO_VERSION );
+		add_len += sizeof(ext_inquiry_data_pkt->vendor_spec);
+	}
 
-			add_len += sizeof(ext_inquiry_data_pkt->version_desc[1]);
-		}
+	if ( len >= ISCSI_NEXT_OFFSET(iscsi_scsi_ext_inquiry_data_packet, flags) ) {
+		ext_inquiry_data_pkt->flags = 0;
 
-		if ( len >= ISCSI_NEXT_OFFSET(iscsi_scsi_ext_inquiry_data_packet, version_desc[2]) ) {
-			iscsi_put_be16( (uint8_t *) &ext_inquiry_data_pkt->version_desc[2], ISCSI_SCSI_EXT_INQUIRY_DATA_VERSION_DESC_SBC2_NO_VERSION );
+		add_len += sizeof(ext_inquiry_data_pkt->flags);
+	}
 
-			add_len += sizeof(ext_inquiry_data_pkt->version_desc[2]);
-		}
+	if ( len >= ISCSI_NEXT_OFFSET(iscsi_scsi_ext_inquiry_data_packet, reserved) ) {
+		ext_inquiry_data_pkt->reserved = 0U;
 
-		if ( len >= ISCSI_NEXT_OFFSET(iscsi_scsi_ext_inquiry_data_packet, version_desc[3]) ) {
-			iscsi_put_be16( (uint8_t *) &ext_inquiry_data_pkt->version_desc[3], ISCSI_SCSI_EXT_INQUIRY_DATA_VERSION_DESC_SAM2_NO_VERSION );
+		add_len += sizeof(ext_inquiry_data_pkt->reserved);
+	}
 
-			add_len += sizeof(ext_inquiry_data_pkt->version_desc[3]);
-		}
+	if ( len >= ISCSI_NEXT_OFFSET(iscsi_scsi_ext_inquiry_data_packet, version_desc[0]) ) {
+		iscsi_put_be16( (uint8_t *) &ext_inquiry_data_pkt->version_desc[0], ISCSI_SCSI_EXT_INQUIRY_DATA_VERSION_DESC_ISCSI_NO_VERSION );
 
-		if ( len >= ISCSI_NEXT_OFFSET(iscsi_scsi_ext_inquiry_data_packet, version_desc[4]) ) {
-			uint alloc_len = (uint) (len - offsetof(iscsi_scsi_ext_inquiry_data_packet, version_desc[4]));
+		add_len += sizeof(ext_inquiry_data_pkt->version_desc[0]);
+	}
 
-			if ( alloc_len > (sizeof(struct iscsi_scsi_ext_inquiry_data_packet) - offsetof(iscsi_scsi_ext_inquiry_data_packet, version_desc[4])) )
-				alloc_len = (sizeof(struct iscsi_scsi_ext_inquiry_data_packet) - offsetof(iscsi_scsi_ext_inquiry_data_packet, version_desc[4]));
+	if ( len >= ISCSI_NEXT_OFFSET(iscsi_scsi_ext_inquiry_data_packet, version_desc[1]) ) {
+		iscsi_put_be16( (uint8_t *) &ext_inquiry_data_pkt->version_desc[1], ISCSI_SCSI_EXT_INQUIRY_DATA_VERSION_DESC_SPC3_NO_VERSION );
 
-			memset( &ext_inquiry_data_pkt->version_desc[4], 0, alloc_len );
-			add_len += alloc_len;
-		}
+		add_len += sizeof(ext_inquiry_data_pkt->version_desc[1]);
+	}
 
-		std_inquiry_data_pkt->basic_inquiry.add_len = (uint8_t) add_len;
+	if ( len >= ISCSI_NEXT_OFFSET(iscsi_scsi_ext_inquiry_data_packet, version_desc[2]) ) {
+		iscsi_put_be16( (uint8_t *) &ext_inquiry_data_pkt->version_desc[2], ISCSI_SCSI_EXT_INQUIRY_DATA_VERSION_DESC_SBC2_NO_VERSION );
 
-		return (int) (add_len + sizeof(struct iscsi_scsi_basic_inquiry_data_packet));
+		add_len += sizeof(ext_inquiry_data_pkt->version_desc[2]);
 	}
-}
 
-/**
- * @brief Fills in a single LUN entry of a report LUNs operation on a DNBD3 image.
- *
- * Callback function for each element while iterating
- * through the iSCSI SCSI LUNs hash map.\n
- * The iteration process is aborted when the
- * remaining allocation length is not enough
- * to hold the current LUN.
- *
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] value Value of the key, NULL creates an
- * empty key assignment.
- * @param[in,out] user_data Pointer to a data structure
- * containing the report LUN list, the
- * current report LUN entry, the total
- * length of all LUN entries in bytes, the
- * remaining allocation length in bytes and
- * the selected report. May NOT be NULL, so
- * be careful.
- * @retval -1 Operation failure, ran out of
- * allocation space during traversal.
- * @retval 0 Successful operation, there is enough
- * allocation space to store this
- * reported LUN entry.
- */
-int iscsi_scsi_emu_primary_report_luns_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data)
-{
-	iscsi_scsi_emu_primary_report_luns_fill *lun_report_fill = (iscsi_scsi_emu_primary_report_luns_fill *) user_data;
-	iscsi_scsi_lun *scsi_lun = (iscsi_scsi_lun *) value;
+	if ( len >= ISCSI_NEXT_OFFSET(iscsi_scsi_ext_inquiry_data_packet, version_desc[3]) ) {
+		iscsi_put_be16( (uint8_t *) &ext_inquiry_data_pkt->version_desc[3], ISCSI_SCSI_EXT_INQUIRY_DATA_VERSION_DESC_SAM2_NO_VERSION );
 
-	lun_report_fill->alloc_len -= (uint) sizeof(struct iscsi_scsi_report_luns_parameter_data_lun_entry_packet);
+		add_len += sizeof(ext_inquiry_data_pkt->version_desc[3]);
+	}
 
-	if ( (int) lun_report_fill->alloc_len < 0 )
-		return -1;
+	if ( len >= ISCSI_NEXT_OFFSET(iscsi_scsi_ext_inquiry_data_packet, version_desc[4]) ) {
+		uint alloc_len = (uint) (len - offsetof(iscsi_scsi_ext_inquiry_data_packet, version_desc[4]));
 
-	lun_report_fill->len += (uint) sizeof(struct iscsi_scsi_report_luns_parameter_data_lun_entry_packet);
+		if ( alloc_len > (sizeof(struct iscsi_scsi_ext_inquiry_data_packet) - offsetof(iscsi_scsi_ext_inquiry_data_packet, version_desc[4])) )
+			alloc_len = (sizeof(struct iscsi_scsi_ext_inquiry_data_packet) - offsetof(iscsi_scsi_ext_inquiry_data_packet, version_desc[4]));
 
-	const uint64_t lun = iscsi_scsi_lun_get_from_scsi( scsi_lun->id );
-	iscsi_put_be64( (uint8_t *) &lun_report_fill->lun_entry->lun, lun );
+		memset( &ext_inquiry_data_pkt->version_desc[4], 0, alloc_len );
+		add_len += alloc_len;
+	}
 
-	lun_report_fill->lun_entry++;
+	std_inquiry_data_pkt->basic_inquiry.add_len = (uint8_t) add_len;
 
-	return 0;
+	return (int) (add_len + sizeof(struct iscsi_scsi_basic_inquiry_data_packet));
 }
 
 /**
@@ -6820,9 +1731,6 @@ int iscsi_scsi_emu_primary_report_luns_callback(uint8_t *key, const size_t key_s
  * This function also sets the SCSI
  * status result code accordingly.
  *
- * @param[in] lun Pointer to iSCSI SCSI LUN to
- * report the LUNs for. May NOT be
- * NULL, so be careful.
  * @param[in] report_luns_parameter_data_pkt Pointer to report LUNS
  * parameter data packet to fill the
  * LUN data data with.
@@ -6833,45 +1741,29 @@ int iscsi_scsi_emu_primary_report_luns_callback(uint8_t *key, const size_t key_s
  * operation, a negative error code
  * otherwise.
  */
-static int iscsi_scsi_emu_primary_report_luns(iscsi_scsi_lun *lun, iscsi_scsi_report_luns_parameter_data_lun_list_packet *report_luns_parameter_data_pkt, const uint len, const uint select_report)
+static int iscsi_scsi_emu_primary_report_luns( iscsi_scsi_report_luns_parameter_data_lun_list_packet *report_luns_parameter_data_pkt, const uint len, const uint select_report)
 {
-	if ( len < sizeof(struct iscsi_scsi_report_luns_parameter_data_lun_list_packet) )
+	const uint64_t lun = iscsi_scsi_lun_get_from_scsi( ISCSI_DEFAULT_LUN );
+
+	if ( len < sizeof(struct iscsi_scsi_report_luns_parameter_data_lun_list_packet) + sizeof(lun) )
 		return -1;
 
 	switch ( select_report ) {
-		case ISCSI_SCSI_CDB_REPORT_LUNS_SELECT_REPORT_LU_ADDR_METHOD : {
-			break;
-		}
-		case ISCSI_SCSI_CDB_REPORT_LUNS_SELECT_REPORT_LU_KNOWN : {
-			break;
-		}
+		case ISCSI_SCSI_CDB_REPORT_LUNS_SELECT_REPORT_LU_ADDR_METHOD :
+		case ISCSI_SCSI_CDB_REPORT_LUNS_SELECT_REPORT_LU_KNOWN :
 		case ISCSI_SCSI_CDB_REPORT_LUNS_SELECT_REPORT_LU_ALL : {
 			break;
 		}
 		default : {
 			return -1;
-
-			break;
 		}
 	}
 
-	report_luns_parameter_data_pkt->lun_list_len = 0UL;
 	report_luns_parameter_data_pkt->reserved     = 0UL;
+	iscsi_put_be32( (uint8_t *) &report_luns_parameter_data_pkt->lun_list_len, sizeof(lun) );
+	iscsi_put_be64( (uint8_t *) (report_luns_parameter_data_pkt + 1), lun );
 
-	iscsi_scsi_emu_primary_report_luns_fill lun_report_fill = {report_luns_parameter_data_pkt, (iscsi_scsi_report_luns_parameter_data_lun_entry_packet *) (report_luns_parameter_data_pkt + 1), 0U, (uint) (len - sizeof(struct iscsi_scsi_report_luns_parameter_data_lun_list_packet)), select_report };
-
-	pthread_rwlock_rdlock( &lun->device->luns_rwlock );
-
-	const int rc = iscsi_hashmap_iterate( lun->device->luns, iscsi_scsi_emu_primary_report_luns_callback, (uint8_t *) &lun_report_fill );
-
-	pthread_rwlock_unlock( &lun->device->luns_rwlock );
-
-	if ( rc < 0 )
-		return -1;
-
-	iscsi_put_be32( (uint8_t *) &report_luns_parameter_data_pkt->lun_list_len, lun_report_fill.len );
-
-	return (int) (lun_report_fill.len + sizeof(struct iscsi_scsi_report_luns_parameter_data_lun_list_packet));
+	return (int) (sizeof(lun) + sizeof(struct iscsi_scsi_report_luns_parameter_data_lun_list_packet));
 }
 
 /**
@@ -7059,9 +1951,6 @@ static int iscsi_scsi_emu_primary_mode_sense_page(dnbd3_image_t *image, iscsi_sc
 
 			iscsi_scsi_emu_primary_mode_sense_page_init( mode_sense_mode_page_pkt, page_len, page, sub_page );
 
-			if ( (mode_sense_mode_page_pkt != NULL) && iscsi_scsi_emu_io_type_is_supported( image, ISCSI_SCSI_EMU_IO_TYPE_WRITE_CACHE ) && (pc != ISCSI_SCSI_CDB_MODE_SENSE_6_PAGE_CONTROL_CHG_VALUES) )
-				mode_sense_caching_mode_page_pkt->flags |= ISCSI_SCSI_MODE_SENSE_CACHING_MODE_PAGE_FLAGS_WCE;
-
 			if ( (mode_sense_mode_page_pkt != NULL) && (pc != ISCSI_SCSI_CDB_MODE_SENSE_6_PAGE_CONTROL_CHG_VALUES) )
 				mode_sense_caching_mode_page_pkt->flags |= ISCSI_SCSI_MODE_SENSE_CACHING_MODE_PAGE_FLAGS_RCD;
 
@@ -7222,21 +2111,24 @@ static int iscsi_scsi_emu_primary_mode_sense(dnbd3_image_t *image, iscsi_scsi_ta
 	if ( hdr_len == sizeof(struct iscsi_scsi_mode_sense_6_parameter_header_data_packet) ) {
 		mode_sense_6_parameter_hdr_data_pkt->mode_data_len  = (uint8_t) (alloc_len - sizeof(uint8_t));
 		mode_sense_6_parameter_hdr_data_pkt->medium_type    = 0U;
-		mode_sense_6_parameter_hdr_data_pkt->flags          = (int8_t) ((iscsi_scsi_emu_io_type_is_supported( image, ISCSI_SCSI_EMU_IO_TYPE_PHYSICAL_READ_ONLY ) || iscsi_scsi_emu_io_type_is_supported( image, ISCSI_SCSI_EMU_IO_TYPE_WRITE_PROTECT )) ? ISCSI_SCSI_MODE_SENSE_6_PARAM_HDR_DATA_FLAGS_WP : 0);
+		mode_sense_6_parameter_hdr_data_pkt->flags          = ISCSI_SCSI_MODE_SENSE_6_PARAM_HDR_DATA_FLAGS_WP;
 		mode_sense_6_parameter_hdr_data_pkt->block_desc_len = (uint8_t) block_desc_len;
-	} else {
+	} else if ( hdr_len == sizeof(struct iscsi_scsi_mode_sense_10_parameter_header_data_packet) ) {
 		iscsi_scsi_mode_sense_10_parameter_header_data_packet *mode_sense_10_parameter_hdr_data_pkt = (iscsi_scsi_mode_sense_10_parameter_header_data_packet *) mode_sense_6_parameter_hdr_data_pkt;
 
 		iscsi_put_be16( (uint8_t *) &mode_sense_10_parameter_hdr_data_pkt->mode_data_len, (uint16_t) (alloc_len - sizeof(uint16_t)) );
 		mode_sense_10_parameter_hdr_data_pkt->medium_type    = 0U;
-		mode_sense_10_parameter_hdr_data_pkt->flags          = (int8_t) ((iscsi_scsi_emu_io_type_is_supported( image, ISCSI_SCSI_EMU_IO_TYPE_PHYSICAL_READ_ONLY ) || iscsi_scsi_emu_io_type_is_supported( image, ISCSI_SCSI_EMU_IO_TYPE_WRITE_PROTECT )) ? ISCSI_SCSI_MODE_SENSE_10_PARAM_HDR_DATA_FLAGS_WP : 0);
+		mode_sense_10_parameter_hdr_data_pkt->flags          = ISCSI_SCSI_MODE_SENSE_10_PARAM_HDR_DATA_FLAGS_WP;
 		mode_sense_10_parameter_hdr_data_pkt->long_lba       = (uint8_t) long_lba;
 		mode_sense_10_parameter_hdr_data_pkt->reserved       = 0U;
 		iscsi_put_be16( (uint8_t *) &mode_sense_10_parameter_hdr_data_pkt->block_desc_len, (uint16_t) block_desc_len );
+	} else {
+		logadd( LOG_DEBUG1, "iscsi_scsi_emu_primary_mode_sense: invalid parameter header length %u", hdr_len );
+		return -1;
 	}
 
 	const uint64_t num_blocks = iscsi_scsi_emu_block_get_count( image );
-	const uint32_t block_size = iscsi_scsi_emu_block_get_size( image );
+	const uint32_t block_size = ISCSI_SCSI_EMU_BLOCK_SIZE;
 
 	if ( block_desc_len == sizeof(struct iscsi_scsi_mode_sense_lba_parameter_block_desc_data_packet) ) {
 		iscsi_scsi_mode_sense_lba_parameter_block_desc_data_packet *lba_parameter_block_desc = (iscsi_scsi_mode_sense_lba_parameter_block_desc_data_packet *) (((uint8_t *) mode_sense_6_parameter_hdr_data_pkt) + hdr_len);
@@ -7275,7 +2167,6 @@ static int iscsi_scsi_emu_primary_mode_sense(dnbd3_image_t *image, iscsi_scsi_ta
  */
 static int iscsi_scsi_emu_primary_process(iscsi_scsi_task *scsi_task)
 {
-	iscsi_scsi_lun *lun = scsi_task->lun;
 	uint alloc_len;
 	uint len;
 	int rc;
@@ -7284,9 +2175,6 @@ static int iscsi_scsi_emu_primary_process(iscsi_scsi_task *scsi_task)
 		case ISCSI_SCSI_OPCODE_INQUIRY : {
 			const iscsi_scsi_cdb_inquiry *cdb_inquiry = (iscsi_scsi_cdb_inquiry *) scsi_task->cdb;
 
-			if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-				break;
-
 			alloc_len = iscsi_get_be16(cdb_inquiry->alloc_len);
 			len       = alloc_len;
 
@@ -7305,7 +2193,7 @@ static int iscsi_scsi_emu_primary_process(iscsi_scsi_task *scsi_task)
 				}
 			}
 
-			rc = iscsi_scsi_emu_primary_inquiry( lun->image, scsi_task, cdb_inquiry, std_inquiry_data_pkt, len );
+			rc = iscsi_scsi_emu_primary_inquiry( scsi_task->connection->client->image, scsi_task, cdb_inquiry, std_inquiry_data_pkt, len );
 
 			if ( (rc >= 0) && (len > 0U) ) {
 				if ( len > alloc_len )
@@ -7352,7 +2240,7 @@ static int iscsi_scsi_emu_primary_process(iscsi_scsi_task *scsi_task)
 				}
 			}
 
-			rc = iscsi_scsi_emu_primary_report_luns( lun, report_luns_parameter_data_pkt, len, cdb_report_luns->select_report );
+			rc = iscsi_scsi_emu_primary_report_luns( report_luns_parameter_data_pkt, len, cdb_report_luns->select_report );
 
 			if ( rc < 0 ) {
 				free( report_luns_parameter_data_pkt );
@@ -7375,76 +2263,17 @@ static int iscsi_scsi_emu_primary_process(iscsi_scsi_task *scsi_task)
 
 			break;
 		}
-		case ISCSI_SCSI_OPCODE_MODESELECT6 : {
-			const iscsi_scsi_cdb_mode_select_6 *cdb_mode_select_6 = (iscsi_scsi_cdb_mode_select_6 *) scsi_task->cdb;
-
-			alloc_len = cdb_mode_select_6->param_list_len;
-
-			if ( alloc_len == 0U )
-				break;
-
-			rc = iscsi_scsi_emu_check_len( scsi_task, alloc_len, sizeof(struct iscsi_scsi_mode_select_6_parameter_list_packet) );
-
-			if ( rc < 0 )
-				break;
-
-			len = scsi_task->len;
-
-			if ( alloc_len < sizeof(struct iscsi_scsi_mode_select_6_parameter_list_packet) )
-				alloc_len = sizeof(struct iscsi_scsi_mode_select_6_parameter_list_packet);
-
-			rc = iscsi_scsi_emu_check_len( scsi_task, len, alloc_len );
-
-			if ( rc < 0 )
-				break;
-
-			scsi_task->xfer_pos = alloc_len;
-			scsi_task->status   = ISCSI_SCSI_STATUS_GOOD;
-
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_MODESELECT10 : {
-			const iscsi_scsi_cdb_mode_select_10 *cdb_mode_select_10 = (iscsi_scsi_cdb_mode_select_10 *) scsi_task->cdb;
-
-			alloc_len = iscsi_get_be16(cdb_mode_select_10->param_list_len);
-
-			if ( alloc_len == 0U )
-				break;
-
-			rc = iscsi_scsi_emu_check_len( scsi_task, alloc_len, sizeof(struct iscsi_scsi_mode_select_10_parameter_list_packet) );
-
-			if ( rc < 0 )
-				break;
-
-			len = scsi_task->len;
-
-			if ( alloc_len < sizeof(struct iscsi_scsi_mode_select_10_parameter_list_packet) )
-				alloc_len = sizeof(struct iscsi_scsi_mode_select_10_parameter_list_packet);
-
-			rc = iscsi_scsi_emu_check_len( scsi_task, len, alloc_len );
-
-			if ( rc < 0 )
-				break;
-
-			scsi_task->xfer_pos = alloc_len;
-			scsi_task->status   = ISCSI_SCSI_STATUS_GOOD;
-
-			break;
-		}
 		case ISCSI_SCSI_OPCODE_MODESENSE6 : {
 			const iscsi_scsi_cdb_mode_sense_6 *cdb_mode_sense_6 = (iscsi_scsi_cdb_mode_sense_6 *) scsi_task->cdb;
 
-			if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-				break;
-
 			alloc_len = cdb_mode_sense_6->alloc_len;
 
-			const uint block_desc_len = (((cdb_mode_sense_6->flags & ISCSI_SCSI_CDB_MODE_SENSE_6_FLAGS_DBD) == 0) ? sizeof(struct iscsi_scsi_mode_sense_lba_parameter_block_desc_data_packet) : 0U);
+			const uint block_desc_len = ((cdb_mode_sense_6->flags & ISCSI_SCSI_CDB_MODE_SENSE_6_FLAGS_DBD) == 0) ? sizeof(struct iscsi_scsi_mode_sense_lba_parameter_block_desc_data_packet) : 0U;
 			const uint pc             = ISCSI_SCSI_CDB_MODE_SENSE_6_GET_PAGE_CONTROL(cdb_mode_sense_6->page_code_control);
 			const uint page           = ISCSI_SCSI_CDB_MODE_SENSE_6_GET_PAGE_CODE(cdb_mode_sense_6->page_code_control);
 			const uint sub_page       = cdb_mode_sense_6->sub_page_code;
 
-			rc = iscsi_scsi_emu_primary_mode_sense( lun->image, scsi_task, NULL, sizeof(struct iscsi_scsi_mode_sense_6_parameter_header_data_packet), block_desc_len, 0U, pc, page, sub_page );
+			rc = iscsi_scsi_emu_primary_mode_sense( scsi_task->connection->client->image, scsi_task, NULL, sizeof(struct iscsi_scsi_mode_sense_6_parameter_header_data_packet), block_desc_len, 0U, pc, page, sub_page );
 
 			if ( rc < 0 )
 				break;
@@ -7459,7 +2288,7 @@ static int iscsi_scsi_emu_primary_process(iscsi_scsi_task *scsi_task)
 				break;
 			}
 
-			rc = iscsi_scsi_emu_primary_mode_sense( lun->image, scsi_task, mode_sense_6_parameter_hdr_data_pkt, sizeof(struct iscsi_scsi_mode_sense_6_parameter_header_data_packet), block_desc_len, 0U, pc, page, sub_page );
+			rc = iscsi_scsi_emu_primary_mode_sense( scsi_task->connection->client->image, scsi_task, mode_sense_6_parameter_hdr_data_pkt, sizeof(struct iscsi_scsi_mode_sense_6_parameter_header_data_packet), block_desc_len, 0U, pc, page, sub_page );
 
 			if ( rc < 0 ) {
 				free( mode_sense_6_parameter_hdr_data_pkt );
@@ -7486,9 +2315,6 @@ static int iscsi_scsi_emu_primary_process(iscsi_scsi_task *scsi_task)
 		case ISCSI_SCSI_OPCODE_MODESENSE10 : {
 			const iscsi_scsi_cdb_mode_sense_10 *cdb_mode_sense_10 = (iscsi_scsi_cdb_mode_sense_10 *) scsi_task->cdb;
 
-			if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-				break;
-
 			alloc_len = iscsi_get_be16(cdb_mode_sense_10->alloc_len);
 
 			const uint long_lba       = (((cdb_mode_sense_10->flags & ISCSI_SCSI_CDB_MODE_SENSE_10_FLAGS_LLBAA) != 0) ? ISCSI_SCSI_MODE_SENSE_10_PARAM_HDR_DATA_LONGLBA : 0U);
@@ -7497,7 +2323,7 @@ static int iscsi_scsi_emu_primary_process(iscsi_scsi_task *scsi_task)
 			const uint page10         = ISCSI_SCSI_CDB_MODE_SENSE_10_GET_PAGE_CODE(cdb_mode_sense_10->page_code_control);
 			const uint sub_page10     = cdb_mode_sense_10->sub_page_code;
 
-			rc = iscsi_scsi_emu_primary_mode_sense( lun->image, scsi_task, NULL, sizeof(struct iscsi_scsi_mode_sense_10_parameter_header_data_packet), block_desc_len, long_lba, pc10, page10, sub_page10 );
+			rc = iscsi_scsi_emu_primary_mode_sense( scsi_task->connection->client->image, scsi_task, NULL, sizeof(struct iscsi_scsi_mode_sense_10_parameter_header_data_packet), block_desc_len, long_lba, pc10, page10, sub_page10 );
 
 			if ( rc < 0 )
 				break;
@@ -7512,7 +2338,7 @@ static int iscsi_scsi_emu_primary_process(iscsi_scsi_task *scsi_task)
 				break;
 			}
 
-			rc = iscsi_scsi_emu_primary_mode_sense( lun->image, scsi_task, (iscsi_scsi_mode_sense_6_parameter_header_data_packet *) mode_sense_10_parameter_hdr_data_pkt, sizeof(struct iscsi_scsi_mode_sense_10_parameter_header_data_packet), block_desc_len, long_lba, pc10, page10, sub_page10 );
+			rc = iscsi_scsi_emu_primary_mode_sense( scsi_task->connection->client->image, scsi_task, (iscsi_scsi_mode_sense_6_parameter_header_data_packet *) mode_sense_10_parameter_hdr_data_pkt, sizeof(struct iscsi_scsi_mode_sense_10_parameter_header_data_packet), block_desc_len, long_lba, pc10, page10, sub_page10 );
 
 			if ( rc < 0 ) {
 				free( mode_sense_10_parameter_hdr_data_pkt );
@@ -7536,176 +2362,18 @@ static int iscsi_scsi_emu_primary_process(iscsi_scsi_task *scsi_task)
 
 			break;
 		}
-		case ISCSI_SCSI_OPCODE_REQUESTSENSE : {
-			const iscsi_scsi_cdb_req_sense *cdb_req_sense = (iscsi_scsi_cdb_req_sense *) scsi_task->cdb;
-
-			if ( (cdb_req_sense->flags & ISCSI_SCSI_CDB_REQ_SENSE_FLAGS_DESC) != 0 ) {
-				iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_ILLEGAL_REQ, ISCSI_SCSI_ASC_INVALID_FIELD_IN_CDB, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-				break;
-			}
-
-			alloc_len = cdb_req_sense->alloc_len;
-
-			iscsi_scsi_task_sense_data_build( scsi_task, ISCSI_SCSI_SENSE_KEY_NO_SENSE, ISCSI_SCSI_ASC_NO_ADDITIONAL_SENSE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-			len = scsi_task->sense_data_len;
-
-			if ( len > 0U ) {
-				iscsi_scsi_sense_data_check_cond_packet *sense_data = (iscsi_scsi_sense_data_check_cond_packet *) malloc( len );
-
-				if ( sense_data == NULL ) {
-					iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_NOT_READY, ISCSI_SCSI_ASC_LOGICAL_UNIT_NOT_READY, ISCSI_SCSI_ASCQ_BECOMING_READY );
-
-					break;
-				}
-
-				memcpy( sense_data, scsi_task->sense_data, len );
-
-				if ( len > alloc_len )
-					len = alloc_len;
-
-				scsi_task->buf = (uint8_t *) sense_data;
-			}
-
-			scsi_task->xfer_pos = len;
-			scsi_task->status   = ISCSI_SCSI_STATUS_GOOD;
-
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_LOGSELECT :
-		case ISCSI_SCSI_OPCODE_LOGSENSE : {
-			iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_ILLEGAL_REQ, ISCSI_SCSI_ASC_INVALID_COMMAND_OPERATION_CODE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-			break;
-		}
 		case ISCSI_SCSI_OPCODE_TESTUNITREADY : {
-			if ( !iscsi_scsi_emu_image_init( scsi_task, false ) )
-				break;
-
 			scsi_task->xfer_pos = 0UL;
 			scsi_task->status   = ISCSI_SCSI_STATUS_GOOD;
 
 			break;
 		}
 		case ISCSI_SCSI_OPCODE_STARTSTOPUNIT : {
-			// TODO: Handle eject image and power saving (suspend and standby) modes.
-
-			if ( !iscsi_scsi_emu_image_init( scsi_task, true ) )
-				break;
-
 			scsi_task->xfer_pos = 0UL;
 			scsi_task->status   = ISCSI_SCSI_STATUS_GOOD;
 
 			break;
 		}
-		case ISCSI_SCSI_OPCODE_PERSISTENT_RESERVE_OUT : {
-			const iscsi_scsi_cdb_pr_reserve_out *cdb_pr_reserve_out = (iscsi_scsi_cdb_pr_reserve_out *) scsi_task->cdb;
-
-			alloc_len = iscsi_get_be32(cdb_pr_reserve_out->param_list_len);
-			rc        = iscsi_scsi_emu_check_len( scsi_task, alloc_len, sizeof(struct iscsi_scsi_pr_reserve_out_parameter_list_packet) );
-
-			if ( rc < 0 )
-				break;
-
-			len = scsi_task->len;
-
-			iscsi_scsi_pr_reserve_out_parameter_list_packet *pr_reserve_out_parameter_list = (iscsi_scsi_pr_reserve_out_parameter_list_packet *) malloc( len );
-
-			if ( pr_reserve_out_parameter_list == NULL ) {
-				iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_NOT_READY, ISCSI_SCSI_ASC_LOGICAL_UNIT_NOT_READY, ISCSI_SCSI_ASCQ_BECOMING_READY );
-
-				break;
-			}
-
-			if ( len < sizeof(struct iscsi_scsi_pr_reserve_out_parameter_list_packet) ) {
-				free( pr_reserve_out_parameter_list );
-
-				break;
-			}
-
-			rc = iscsi_scsi_pr_out( scsi_task, pr_reserve_out_parameter_list, cdb_pr_reserve_out, len );
-
-			if ( rc < 0 ) {
-				free( pr_reserve_out_parameter_list );
-
-				break;
-			}
-
-			scsi_task->xfer_pos = alloc_len;
-			scsi_task->status   = ISCSI_SCSI_STATUS_GOOD;
-
-			free( pr_reserve_out_parameter_list );
-
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_PERSISTENT_RESERVE_IN : {
-			const iscsi_scsi_cdb_pr_reserve_in *cdb_pr_reserve_in = (iscsi_scsi_cdb_pr_reserve_in *) scsi_task->cdb;
-
-			alloc_len = iscsi_get_be16(cdb_pr_reserve_in->param_list_len);
-			len       = alloc_len;
-
-			iscsi_scsi_pr_reserve_in_parameter_data_packet *pr_reserve_in_parameter_data = (iscsi_scsi_pr_reserve_in_parameter_data_packet *) malloc( len );
-
-			if ( pr_reserve_in_parameter_data == NULL ) {
-				iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_NOT_READY, ISCSI_SCSI_ASC_LOGICAL_UNIT_NOT_READY, ISCSI_SCSI_ASCQ_BECOMING_READY );
-
-				break;
-			}
-
-			rc = iscsi_scsi_pr_in( scsi_task, pr_reserve_in_parameter_data, cdb_pr_reserve_in, len );
-
-			if ( (rc >= 0) && (len > 0U) ) {
-				if ( len > alloc_len )
-					len = alloc_len;
-
-				scsi_task->buf = (uint8_t *) pr_reserve_in_parameter_data;
-				rc             = len;
-			}
-
-			if ( rc >= 0 ) {
-				scsi_task->xfer_pos = rc;
-				scsi_task->status   = ISCSI_SCSI_STATUS_GOOD;
-			}
-
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_RESERVE6 : {
-			const iscsi_scsi_cdb_pr_reserve_6 *cdb_pr_reserve_6 = (iscsi_scsi_cdb_pr_reserve_6 *) scsi_task->cdb;
-
-			rc = iscsi_scsi_pr_reserve_scsi2( scsi_task, cdb_pr_reserve_6 );
-
-			if ( rc >= 0 ) {
-				scsi_task->xfer_pos = rc;
-				scsi_task->status   = ISCSI_SCSI_STATUS_GOOD;
-			}
-
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_RESERVE10 : {
-			const iscsi_scsi_cdb_pr_reserve_10 *cdb_pr_reserve_10 = (iscsi_scsi_cdb_pr_reserve_10 *) scsi_task->cdb;
-
-			rc = iscsi_scsi_pr_reserve_scsi2( scsi_task, (iscsi_scsi_cdb_pr_reserve_6 *) cdb_pr_reserve_10 );
-			rc = iscsi_get_be16(cdb_pr_reserve_10->param_list_len);
-
-			if ( rc >= 0 ) {
-				scsi_task->xfer_pos = rc;
-				scsi_task->status   = ISCSI_SCSI_STATUS_GOOD;
-			}
-
-			break;
-		}
-		case ISCSI_SCSI_OPCODE_RELEASE6 :
-		case ISCSI_SCSI_OPCODE_RELEASE10 : {
-			rc = iscsi_scsi_pr_release_scsi2( scsi_task );
-
-			if ( rc >= 0 ) {
-				scsi_task->xfer_pos = rc;
-				scsi_task->status   = ISCSI_SCSI_STATUS_GOOD;
-			}
-
-			break;
-		}
 		default : {
 			return ISCSI_SCSI_TASK_RUN_UNKNOWN;
 
@@ -7717,957 +2385,6 @@ static int iscsi_scsi_emu_primary_process(iscsi_scsi_task *scsi_task)
 }
 
 /**
- * @brief Executes the iSCSI SCSI emulation for an iSCSI SCSI task.
- *
- * This function also handles all SCSI emulation
- * tasks for DNBD3 image mapping.
- *
- * @param[in] scsi_task Pointer to iSCSI SCSI task for which
- * SCSI should be emulated and may NOT be NULL,
- * so be careful.
- * @return 0 on successful SCSI emulation or a
- * negative error code otherwise.
- */
-int iscsi_scsi_emu_exec(iscsi_scsi_task *scsi_task)
-{
-	int rc = iscsi_scsi_emu_block_process( scsi_task );
-
-	if ( rc == ISCSI_SCSI_TASK_RUN_UNKNOWN ) {
-		rc = iscsi_scsi_emu_primary_process( scsi_task );
-
-		if ( rc == ISCSI_SCSI_TASK_RUN_UNKNOWN ) {
-			iscsi_scsi_task_status_set( scsi_task, ISCSI_SCSI_STATUS_CHECK_COND, ISCSI_SCSI_SENSE_KEY_ILLEGAL_REQ, ISCSI_SCSI_ASC_INVALID_COMMAND_OPERATION_CODE, ISCSI_SCSI_ASCQ_CAUSE_NOT_REPORTABLE );
-
-			return ISCSI_SCSI_TASK_RUN_COMPLETE;
-		}
-	}
-
-	return rc;
-}
-
-/**
- * @brief Allocates and initializes an iSCSI port.
- *
- * THis function marks the port in use, but does
- * NOT set a transport ID. Everything else is
- * initialized, however.
- *
- * @param[in] name Pointer to port name. This
- * may NOT be NULL, so be careful.
- * @param[in] id Identifier for this port.
- * @param[in] index Index number for this port.
- * @return Pointer to initialized iSCSI port or NULL
- * in case of memory exhaustion.
- */
-iscsi_port *iscsi_port_create(const uint8_t *name, const uint64_t id, const uint16_t index)
-{
-	iscsi_port *port = (iscsi_port *) malloc( sizeof(struct iscsi_port) );
-
-	if ( port == NULL ) {
-		logadd( LOG_ERROR, "iscsi_port_create: Out of memory allocating iSCSI port" );
-
-		return NULL;
-	}
-
-	const uint name_len = (uint) (strlen( (char *) name ) + 1UL);
-
-	port->name = (uint8_t *) malloc( name_len );
-
-	if ( port->name == NULL ) {
-		logadd( LOG_ERROR, "iscsi_port_create: Out of memory allocating iSCSI port name" );
-
-		free( port );
-
-		return NULL;
-	}
-
-	memcpy( port->name, name, name_len );
-
-	port->transport_id     = NULL;
-	port->id               = id;
-	port->index            = index;
-	port->flags            = ISCSI_PORT_FLAGS_IN_USE;
-	port->transport_id_len = 0U;
-
-	return port;
-}
-
-/**
- * @brief iSCSI port destructor callback for hash map.
- *
- * Callback function for deallocation of an iSCSI
- * port stored in the iSCSI device hash map.
- *
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] value Value of the key, NULL is allowed.
- * @param[in,out] user_data This argument is not used by
- * this function and should be always NULL for now, as
- * there is a possibility for future usage.
- * @return Always returns 0 as this function cannot fail.
- */
-int iscsi_port_destroy_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data)
-{
-	iscsi_port_destroy( (iscsi_port *) value );
-
-	return 0;
-}
-
-/**
- * @brief Deallocates all resources acquired iscsi_port_create.
- *
- * This function also frees the port name and transport ID,
- * if they exist.
- *
- * @param[in] port iSCSI port to deallocate. This may
- * be NULL in which case nothing happens.
- */
-void iscsi_port_destroy(iscsi_port *port)
-{
-	if ( port != NULL ) {
-		if ( port->name != NULL ) {
-			free( port->name );
-
-			port->name = NULL;
-		}
-
-		if ( port->transport_id != NULL ) {
-			free( port->transport_id );
-
-			port->transport_id = NULL;
-		}
-
-		free( port );
-	}
-}
-
-/**
- * @brief Retrieves the name of an iSCSI port.
- *
- * This function is just a getter.
- *
- * @param[in] port Pointer to iSCSI port to retrieve
- * the name from and may NOT be NULL, so be
- * careful.
- * @return Pointer to string containing the name
- * of the iSCSI port.
- */
-uint8_t *iscsi_port_get_name(const iscsi_port *port)
-{
-	return port->name;
-}
-
-/**
- * @brief Sets the SCSI transport ID of the iSCSI port.
- *
- * This function constructs the SCSI packet data
- * for the SCSI transport id by assigning a name
- * and the Initiator Session ID (ISID).\n
- * Currently, always transport ID format 0x1 will
- * be created.
- *
- * @param[in] Pointer to iSCSI port to assign the
- * SCSI transport ID to. May NOT be NULL, so be
- * careful.
- * @param[in] Pointer to iSCSI name to assign
- * along with the ISID as name.
- * @param[in] Initiator Session ID (ISID).
- * @return 0 if transport ID could be created
- * successfully, a negative error code
- * otherwise.
- */
-int iscsi_port_transport_id_set(iscsi_port *port, const uint8_t *name, const uint64_t isid)
-{
-	uint8_t *tmp_buf = iscsi_sprintf_alloc( "%s,i,0x%12.12" PRIx64, name, isid );
-
-	if ( tmp_buf == NULL ) {
-		logadd( LOG_ERROR, "iscsi_port_transport_id_set: Out of memory allocating SCSI transport ID name for iSCSI port" );
-
-		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-	}
-
-	const uint name_len = (uint) (strlen( (char *) tmp_buf ) + 1U);
-	const uint len      = ISCSI_ALIGN(name_len, ISCSI_ALIGN_SIZE);
-
-	if ( (len < 20U) || ((len + offsetof(struct iscsi_transport_id, name)) >= 65536U) ) {
-		logadd( LOG_ERROR, "iscsi_port_transport_id_set: Out of memory allocating SCSI transport ID for iSCSI port" );
-
-		free( tmp_buf );
-
-		return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_PARAMETER;
-	}
-
-	port->transport_id = (iscsi_transport_id *) malloc( sizeof(struct iscsi_transport_id) + len );
-
-	if ( port->transport_id == NULL ) {
-		logadd( LOG_ERROR, "iscsi_port_transport_id_set: Out of memory allocating SCSI transport ID for iSCSI port" );
-
-		free( tmp_buf );
-
-		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-	}
-
-	port->transport_id->id       = (ISCSI_TRANSPORT_ID_PUT_PROTOCOL_ID(ISCSI_TRANSPORT_ID_PROTOCOL_ID_ISCSI) | ISCSI_TRANSPORT_ID_PUT_FORMAT(ISCSI_TRANSPORT_ID_PROTOCOL_ID_ISCSI));
-	port->transport_id->reserved = 0U;
-	iscsi_put_be16( (uint8_t *) &port->transport_id->add_len, (uint16_t) len );
-
-	memcpy( ((uint8_t *) port->transport_id) + offsetof(struct iscsi_transport_id, name), tmp_buf, name_len );
-	memset( ((uint8_t *) port->transport_id) + offsetof(struct iscsi_transport_id, name) + name_len, 0, (len - name_len) );
-
-	port->transport_id_len = (uint16_t) (offsetof(struct iscsi_transport_id, name) + len);
-
-	free( tmp_buf );
-
-	return ISCSI_CONNECT_PDU_READ_OK;
-}
-
-/**
- * @brief Creates and initializes an iSCSI device with a maximum number of LUNs.
- *
- * This function creates a virtual SCSI device
- * which links the DNBD3 images to their LUNs.
- *
- * @param[in] name Pointer to name of iSCSI device,
- * may NOT be NULL, so be careful.
- * @param[in] lun_id Initial LUN identifier to create.
- * @param[in] protocol_id Protocol identifier.
- * @return Pointer to iSCSI device or NULL in
- * case of an error.
- */
-iscsi_device *iscsi_device_create(const uint8_t *name, const int lun_id, const uint8_t protocol_id)
-{
-	iscsi_device *device = (iscsi_device *) malloc( sizeof(struct iscsi_device) );
-
-	if ( device == NULL ) {
-		logadd( LOG_ERROR, "iscsi_device_create: Out of memory allocating iSCSI device" );
-
-		return NULL;
-	}
-
-	const uint len = (uint) (strlen( (char *) name ) + 1U);
-
-	device->name = malloc( len );
-
-	if ( device->name == NULL ) {
-		logadd( LOG_ERROR, "iscsi_device_create: Out of memory allocating iSCSI device name" );
-
-		free( device );
-
-		return NULL;
-	}
-
-	memcpy( device->name, name, len );
-
-	device->luns = iscsi_hashmap_create( 8U );
-
-	if ( device->luns == NULL ) {
-		logadd( LOG_ERROR, "iscsi_device_create: Out of memory allocating iSCSI device LUN hash map" );
-
-		free( device->name );
-		free( device );
-
-		return NULL;
-	}
-
-	iscsi_scsi_lun *lun = iscsi_scsi_lun_create( lun_id );
-
-	if ( lun == NULL ) {
-		logadd( LOG_ERROR, "iscsi_device_create: Out of memory allocating iSCSI device LUN hash map" );
-
-		iscsi_hashmap_destroy( device->luns );
-		free( device->name );
-		free( device );
-
-		return NULL;
-	}
-
-	if ( pthread_rwlock_init( &device->luns_rwlock, NULL ) != 0 ) {
-		iscsi_scsi_lun_destroy( lun );
-		iscsi_hashmap_destroy( device->luns );
-		free( device->name );
-		free( device );
-
-		return NULL;
-	}
-
-	const uint64_t lun_hash = lun_id;
-	uint8_t *hash_key       = iscsi_hashmap_key_create( (uint8_t *) &lun_hash, sizeof(lun_hash) );
-
-	if ( hash_key == NULL ) {
-		logadd( LOG_ERROR, "iscsi_device_create: Out of memory allocating iSCSI device LUN hash map" );
-
-		pthread_rwlock_destroy( &device->luns_rwlock );
-		iscsi_scsi_lun_destroy( lun );
-		iscsi_hashmap_destroy( device->luns );
-		free( device->name );
-		free( device );
-
-		return NULL;
-	}
-
-	const int rc = iscsi_hashmap_put( device->luns, hash_key, sizeof(lun_hash), (uint8_t *) lun );
-
-	if ( rc < 0 ) {
-		iscsi_hashmap_key_destroy( hash_key );
-		pthread_rwlock_destroy( &device->luns_rwlock );
-		iscsi_scsi_lun_destroy( lun );
-		iscsi_hashmap_destroy( device->luns );
-		free( device->name );
-		free( device );
-
-		return NULL;
-	}
-
-	lun->device = device;
-
-	device->ports = iscsi_hashmap_create( 0U );
-
-	if ( device->ports == NULL ) {
-		logadd( LOG_ERROR, "iscsi_device_create: Out of memory allocating iSCSI device ports hash map" );
-
-		iscsi_hashmap_key_destroy( hash_key );
-		pthread_rwlock_destroy( &device->luns_rwlock );
-		iscsi_scsi_lun_destroy( lun );
-		iscsi_hashmap_destroy( device->luns );
-		free( device->name );
-		free( device );
-
-		return NULL;
-	}
-
-	device->id           = 0;
-	device->flags        = 0;
-	device->active_conns = 0UL;
-	device->protocol_id  = protocol_id;
-
-	return device;
-}
-
-/**
- * @brief iSCSI device destructor callback for hash map.
- *
- * Callback function for deallocation of an iSCSI
- * device stored in the hash map managing all iSCSI
- * devices.
- *
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] value Value of the key, NULL is allowed.
- * @param[in,out] user_data This argument is not used by
- * this function and should be always NULL for now, as
- * there is a possibility for future usage.
- * @return Always returns 0 as this function cannot fail.
- */
-int iscsi_device_destroy_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data)
-{
-	iscsi_device_destroy( (iscsi_device *) value );
-	iscsi_hashmap_key_destroy( key );
-
-	return 0;
-}
-
-/**
- * @brief Deallocates all resources acquired by iscsi_device_create.
- *
- * This function also frees the associated
- * iSCSI ports, LUNs and the device name.
- *
- * @param[in] device Pointer to iSCSI device to be freed. May
- * be NULL in which case this function does
- * nothing at all.
- */
-void iscsi_device_destroy(iscsi_device *device)
-{
-	if ( device != NULL ) {
-		if ( device->ports != NULL ) {
-			iscsi_hashmap_iterate( device->ports, iscsi_port_destroy_callback, NULL );
-			iscsi_hashmap_destroy( device->ports );
-
-			device->ports = NULL;
-		}
-
-		pthread_rwlock_destroy( &device->luns_rwlock );
-
-		if ( device->luns != NULL ) {
-			iscsi_hashmap_iterate( device->luns, iscsi_scsi_lun_destroy_callback, NULL );
-			iscsi_hashmap_destroy( device->luns );
-
-			device->luns = NULL;
-		}
-
-		if ( device->name != NULL ) {
-			free( device->name );
-
-			device->name = NULL;
-		}
-
-		free( device );
-	}
-}
-
-/**
- * @brief Gets an iSCSI device being in use by portal group identifier.
- *
- * This function uses the unique portal group
- * identifier in order to get the port.
- *
- * @param[in] device Pointer to iSCSI device to be searched. May
- * NOT be NULL, so take caution.
- * @param[in] id Portal group ID to be searched for.
- * @return Pointer to iSCSI port belonging to the iSCSI
- * portal group ID or NULL if either the portal
- * group ID does not exist or the port is NOT in use.
- */
-iscsi_port *iscsi_device_find_port_by_portal_group_tag(const iscsi_device *device, const uint64_t id)
-{
-	iscsi_port *port;
-
-	if ( iscsi_hashmap_get( device->ports, (uint8_t *) &id, sizeof(id), (uint8_t **) &port ) < 0 )
-		return NULL;
-
-	if ( (port == NULL) || ((port->flags & ISCSI_PORT_FLAGS_IN_USE) == 0) )
-		return NULL;
-
-	return port;
-}
-
-/**
- * @brief Searches an iSCSI LUN by LUN identifier.
- *
- * This function searches for an iSCSI LUN by
- * iterating through the iSCSI device LUN
- * hash map.
- *
- * @param[in] device Pointer to iSCSI device to
- * search in the LUN hash map. May NOT be
- * NULL, so be careful.
- * @param[in] lun_id LUN identifier to be searched
- * for.
- * @return Pointer to found iSCSI LUN or NULL in
- * case no iSCSI LUN has a matching LUN
- * identifier.
- */
-iscsi_scsi_lun *iscsi_device_find_lun(iscsi_device *device, const int lun_id)
-{
-	const uint64_t hash_key = (uint64_t) lun_id;
-	iscsi_scsi_lun *lun;
-
-	const int rc = iscsi_hashmap_get( device->luns, (uint8_t *) &hash_key, sizeof(hash_key), (uint8_t **) &lun );
-
-	if ( (rc < 0) || ((lun->flags & ISCSI_SCSI_LUN_FLAGS_REMOVED) != 0) )
-		return NULL;
-
-	return lun;
-}
-
-/**
- * @brief Creates, initializes and adds an iSCSI target port to an iSCSI device.
- *
- * This function checks whether the iSCSI
- * target port already exists for the
- * device.
- *
- * @param[in] device Pointer to iSCSI device to
- * add the port for. May NOT be NULL, so
- * be careful.
- * @param[in] name Pointer to string containing
- * the name for the iSCSI target port.
- * NULL is NOT allowed here, take caution.
- * @param[in] id Unique iSCSI target port
- * identifier to be used.
- * @return 0 on successful operation, 1 if
- * the port already exists or a
- * negative error code otherwise.
- */
-int iscsi_device_port_add(iscsi_device *device, const uint8_t *name, const uint64_t id)
-{
-	if ( iscsi_hashmap_contains( device->ports, (uint8_t *) &id, sizeof(id) ) )
-		return 1;
-
-	iscsi_port *port = iscsi_port_create( name, id, (uint16_t) iscsi_hashmap_size( device->ports ) );
-
-	if ( port == NULL )
-		return -1;
-
-	const int rc = iscsi_hashmap_put( device->ports, (uint8_t *) &port->id, sizeof(port->id), (uint8_t *) port );
-
-	if ( rc < 0 ) {
-		iscsi_port_destroy( port );
-
-		return -1;
-	}
-
-	return 0;
-}
-
-/**
- * @brief Enqueues an iSCSI SCSI task to the first LUN of an iSCSI device.
- *
- * This function adds an iSCSI SCSI task
- * with an unique task identifier to the
- * first LUN of an iSCSI device.
- *
- * @param[in] device Pointer to iSCSI device to enqueue
- * the task to and may NOT be NULL, so be
- * careful.
- * @param[in] scsi_task Pointer to iSCSI SCSI task to enqueue
- * to the associated device. NULL is not
- * allowed here, take caution.
- */
-void iscsi_device_scsi_task_queue(iscsi_device *device, iscsi_scsi_task *scsi_task)
-{
-	iscsi_scsi_lun_task_exec( scsi_task->lun, scsi_task );
-}
-
-/**
- * @brief Checks if an iSCSI target node NAA or EUI hex identifier is valid.
- *
- * This function checks if the NAA or
- * EUI onlycontains only valid
- * hexadecimal characters.
- *
- * @param[in] name Pointer to NAA or EUI name string
- * to be validated, may NOT be NULL, so
- * be careful.
- * @param[in] pos Position of the hexadecimal string
- * to validate.
- * @param[in] len Length of the hexadecimal string
- * to validate.
- * @retval true The NAA or EUI format is valid.
- * @retval false The NAA or EUI format is invalid.
- */
-static bool iscsi_target_node_check_hex(const uint8_t *name, const size_t pos, const size_t len)
-{
-	for ( size_t i = pos; i < len; i++ ) {
-		const uint8_t c = name[i];
-
-		if ( (c < '0') || ((c > '9') && (c < 'A')) || ((c > 'F') && (c < 'a')) || (c > 'f') )
-			return false;
-	}
-
-	return true;
-}
-
-/**
- * @brief Checks if an iSCSI target node name is valid.
- *
- * This function checks the maximum allowed
- * length of the target name and also if it
- * contains only valid characters.\n
- * If the target name starts with 'iqn.' it
- * checks for valid 'iqn.YYYY-MM.' pattern.\n
- * If target name starts with 'naa.' or
- * 'eui.' instead, it will check if the
- * 16 follow up characters are a valid
- * hexadecimal string.
- *
- * @param[in] name Pointer to target name string to be
- * validated, may NOT be NULL, so be
- * careful.
- * @return 0 if all checks passed successfully,
- * a negative error code otherwise.
- */
-static int iscsi_target_node_check_name(const uint8_t *name)
-{
-	if ( iscsi_globvec->target_name_check == ISCSI_GLOBALS_TARGET_NAME_CHECK_NONE )
-		return 0;
-
-	const size_t len = strlen( (char *) name );
-
-	if ( len > ISCSI_TARGET_NODE_MAX_NAME_LEN )
-		return -1;
-
-	if ( (iscsi_globvec->target_name_check == ISCSI_GLOBALS_TARGET_NAME_CHECK_FULL) || (strncasecmp( (char *) name, ISCSI_TARGET_NODE_NAME_IQN_PREFIX, ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_IQN_PREFIX) ) == 0) || (strncasecmp( (char *) name, ISCSI_TARGET_NODE_NAME_NAA_PREFIX, ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_NAA_PREFIX) ) == 0) || (strncasecmp( (char *) name, ISCSI_TARGET_NODE_NAME_EUI_PREFIX, ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_EUI_PREFIX) ) == 0) ) {
-		for ( size_t i = 0; i < len; i++ ) {
-			const uint8_t c = name[i];
-
-			if ( (c <= 0x2CU) || (c == 0x2FU) || ((c >= 0x3BU && c <= 0x40U)) || ((c >= 0x5BU) && (c <= 0x60U)) || ((c >= 0x7BU) && (c <= 0x7FU)) )
-				return -1;
-		}
-	}
-
-	if ( ((strncasecmp( (char *) name, ISCSI_TARGET_NODE_NAME_IQN_PREFIX, ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_IQN_PREFIX) ) == 0) && (!isdigit(name[4]) || !isdigit(name[5]) || !isdigit(name[6]) || !isdigit(name[7]) || (name[8] != '-') || (name[9] < '0') || (name[9] > '1') || ((name[9] == '0') && ((name[10] < '1') && (name[10] > '9'))) || ((name[9] == '1') && ((name[10] < '0') || (name[10] > '2'))) || (name[11] != '.'))) || (((strncasecmp( (char *) name, ISCSI_TARGET_NODE_NAME_NAA_PREFIX, ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_NAA_PREFIX) ) == 0) && ((len == (ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_NAA_PREFIX) + 16)) || (len == (ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_NAA_PREFIX) + 32))) && !iscsi_target_node_check_hex( name, ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_NAA_PREFIX), len )) || (((strncasecmp( (char *) name, ISCSI_TARGET_NODE_NAME_EUI_PREFIX, ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_EUI_PREFIX) ) == 0) && (len == (ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_EUI_PREFIX) + 16))) && !iscsi_target_node_check_hex( name, ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_EUI_PREFIX), len ))) )
-		return -1;
-
-	return 0;
-}
-
-/**
- * @brief Checks if the iSCSI target node flags are valid.
- *
- * This function checks if the set flags
- * are contradicting themselves or are
- * okay.
- *
- * @param[in] flags Target node flags to check.
- * @param[in] chap_group CHAP group to check.
- * @return 0 if flags are valid, a negative
- * error code otherwise.
- */
-static int iscsi_target_node_check_flags(const int flags, const int32_t chap_group)
-{
-	if ( chap_group < 0L )
-		return -1;
-
-	if ( (((flags & ISCSI_TARGET_NODE_FLAGS_CHAP_DISABLE) == 0) && ((flags & ISCSI_TARGET_NODE_FLAGS_CHAP_REQUIRE) == 0) && ((flags & ISCSI_TARGET_NODE_FLAGS_CHAP_MUTUAL) == 0)) || // Auto
-		 (((flags & ISCSI_TARGET_NODE_FLAGS_CHAP_DISABLE) != 0) && ((flags & ISCSI_TARGET_NODE_FLAGS_CHAP_REQUIRE) == 0) && ((flags & ISCSI_TARGET_NODE_FLAGS_CHAP_MUTUAL) == 0)) || // None
-		 (((flags & ISCSI_TARGET_NODE_FLAGS_CHAP_DISABLE) == 0) && ((flags & ISCSI_TARGET_NODE_FLAGS_CHAP_REQUIRE) != 0) && ((flags & ISCSI_TARGET_NODE_FLAGS_CHAP_MUTUAL) == 0)) || // CHAP
-		 (((flags & ISCSI_TARGET_NODE_FLAGS_CHAP_DISABLE) == 0) && ((flags & ISCSI_TARGET_NODE_FLAGS_CHAP_REQUIRE) != 0) && ((flags & ISCSI_TARGET_NODE_FLAGS_CHAP_MUTUAL) != 0)) ) // CHAP Mutual
-		return 0;
-
-	return -1;
-}
-
-/**
- * @brief Creates, initializes and adds a portal group to an iSCSI target node.
- *
- * Callback function for each element while iterating
- * through the iSCSI global vector portal group
- * hash map.
- *
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] value Value of the key, NULL creates an
- * empty key assignment.
- * @param[in,out] user_data Pointer to the iSCSI target
- * node to be added and may NOT be NULL, so be
- * careful.
- * @retval -1 An error occured during adding the
- * iSCSI portal group to the iSCSI target node.
- * @retval 0 The iSCSI portal group has been
- * added successfully.
- */
-int iscsi_target_node_create_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data)
-{
-	iscsi_target_node *target        = (iscsi_target_node *) user_data;
-	iscsi_portal_group *portal_group = (iscsi_portal_group *) value;
-	uint8_t *port_name = iscsi_sprintf_alloc( "%s,t,0x%4.4" PRIx64, target->device->name, portal_group->tag );
-
-	if ( port_name == NULL )
-		return -1;
-
-	const int rc = iscsi_device_port_add( target->device, port_name, (uint64_t) portal_group->tag );
-
-	free( port_name );
-
-	return rc;
-}
-
-/**
- * @brief Creates and initializes an iSCSI target node.
- *
- * This function also allocates the underlying SCSI
- * device and always initializes the first LUN.
- *
- * @param[in] name Pointer to IQN name of target node,
- * may NOT be NULL, so be careful.
- * @param[in] alias Pointer to alias of IQN name.
- * @param[in] index Target node index number.
- * @param[in] lun_id LUN identifier to associate with underlying SCSI device.
- * @param[in] queue_depth Maximum queue depth.
- * @param[in] flags Flags for this target node.
- * @param[in] chap_group CHAP group to associate this node with.
- * @param[in] header_digest Header digest size (always MUST be 0 or 4 for now).
- * @param[in] data_digest Data digest size (always MUST be 0 or 4 for now).
- * @return Pointer to iSCSI target node on successful
- * operation or NULL in case of an error.
- */
-iscsi_target_node *iscsi_target_node_create(uint8_t *name, const uint8_t *alias, const int index, const int lun_id, const uint queue_depth, const int flags, const int32_t chap_group, const int header_digest, const int data_digest)
-{
-	if ( (name == NULL) || (iscsi_target_node_check_name( name ) < 0) || (iscsi_target_node_check_flags( flags, chap_group ) < 0) )
-		return NULL;
-
-	iscsi_target_node *target = (iscsi_target_node *) malloc( sizeof(struct iscsi_target_node) );
-
-	if ( target == NULL ) {
-		logadd( LOG_ERROR, "iscsi_target_node_create: Out of memory allocating iSCSI target node" );
-
-		return NULL;
-	}
-
-	const uint name_len = (uint) (strlen( (char *) name ) + 1U);
-
-	target->name = malloc( name_len );
-
-	if ( target->name == NULL ) {
-		logadd( LOG_ERROR, "iscsi_target_node_create: Out of memory allocating iSCSI target node name" );
-
-		free( target );
-
-		return NULL;
-	}
-
-	memcpy( target->name, name, name_len );
-
-	if ( alias != NULL ) {
-		const uint alias_len = (uint) (strlen( (char *) alias ) + 1U);
-
-		target->alias = malloc( alias_len );
-
-		if ( target->alias == NULL ) {
-			logadd( LOG_ERROR, "iscsi_target_node_create: Out of memory allocating iSCSI target node alias" );
-
-			free( target->name );
-			free( target );
-
-			return NULL;
-		}
-
-		memcpy( target->alias, alias, alias_len );
-	} else {
-		target->alias = NULL;
-	}
-
-	dnbd3_image_t *image = iscsi_target_node_image_get( name );
-
-	if ( image == NULL ) {
-		if ( target->alias != NULL )
-			free( target->alias );
-
-		free( target->name );
-		free( target );
-
-		return NULL;
-	}
-
-	const uint key_len   = (uint) (strlen( (char *) image->name ) + 1U);
-	uint8_t *hash_key    = iscsi_hashmap_key_create( (uint8_t *) image->name, key_len );
-	iscsi_device *device = NULL;
-
-	pthread_rwlock_wrlock( &iscsi_globvec->devices_rwlock );
-	int rc = iscsi_hashmap_get( iscsi_globvec->devices, hash_key, key_len, (uint8_t **) &device );
-
-	if ( device != NULL ) {
-		pthread_rwlock_wrlock( &device->luns_rwlock );
-
-		iscsi_scsi_lun *lun = iscsi_device_find_lun( device, lun_id );
-
-		if ( lun == NULL ) {
-			lun = iscsi_scsi_lun_create( lun_id );
-
-			if ( lun == NULL ) {
-				logadd( LOG_ERROR, "iscsi_target_node_create: Out of memory allocating iSCSI device LUN hash map" );
-
-				pthread_rwlock_unlock( &device->luns_rwlock );
-				pthread_rwlock_unlock( &iscsi_globvec->devices_rwlock );
-				iscsi_hashmap_key_destroy( hash_key );
-
-				if ( target->alias != NULL )
-					free( target->alias );
-
-				free( target->name );
-				free( target );
-
-				return NULL;
-			}
-
-			const uint64_t lun_hash = lun_id;
-			uint8_t *lun_hash_key   = iscsi_hashmap_key_create( (uint8_t *) &lun_hash, sizeof(lun_hash) );
-
-			if ( lun_hash_key == NULL ) {
-				logadd( LOG_ERROR, "iscsi_target_node_create: Out of memory allocating iSCSI device LUN hash map" );
-
-				pthread_rwlock_unlock( &device->luns_rwlock );
-				pthread_rwlock_unlock( &iscsi_globvec->devices_rwlock );
-				iscsi_scsi_lun_destroy( lun );
-				iscsi_hashmap_key_destroy( hash_key );
-
-				if ( target->alias != NULL )
-					free( target->alias );
-
-				free( target->name );
-				free( target );
-
-				return NULL;
-			}
-
-			const int rc = iscsi_hashmap_put( device->luns, lun_hash_key, sizeof(lun_hash), (uint8_t *) lun );
-
-			if ( rc < 0 ) {
-				pthread_rwlock_unlock( &device->luns_rwlock );
-				pthread_rwlock_unlock( &iscsi_globvec->devices_rwlock );
-				iscsi_hashmap_key_destroy( lun_hash_key );
-				iscsi_scsi_lun_destroy( lun );
-				iscsi_hashmap_key_destroy( hash_key );
-
-				if ( target->alias != NULL )
-					free( target->alias );
-
-				free( target->name );
-				free( target );
-
-				return NULL;
-			}
-		}
-
-		pthread_rwlock_unlock( &device->luns_rwlock );
-		iscsi_hashmap_key_destroy( hash_key );
-
-		hash_key = NULL;
-	} else {
-		device = iscsi_device_create( (uint8_t *) image->name, lun_id, ISCSI_TRANSPORT_ID_PROTOCOL_ID_ISCSI );
-
-		if ( device == NULL ) {
-			logadd( LOG_ERROR, "iscsi_target_node_create: Out of memory allocating iSCSI target device" );
-
-			pthread_rwlock_unlock( &iscsi_globvec->devices_rwlock );
-			iscsi_hashmap_key_destroy( hash_key );
-
-			if ( target->alias != NULL )
-				free( target->alias );
-
-			free( target->name );
-			free( target );
-
-			return NULL;
-		}
-
-		rc = iscsi_hashmap_put( iscsi_globvec->devices, hash_key, key_len, (uint8_t *) device );
-
-		if ( rc < 0 ) {
-			pthread_rwlock_unlock( &iscsi_globvec->devices_rwlock );
-			iscsi_device_destroy( device );
-			iscsi_hashmap_key_destroy( hash_key );
-
-			if ( target->alias != NULL )
-				free( target->alias );
-
-			free( target->name );
-			free( target );
-
-			return NULL;
-		}
-	}
-
-	device->active_conns++;
-
-	pthread_rwlock_unlock( &iscsi_globvec->devices_rwlock );
-
-	target->device = device;
-
-	pthread_rwlock_rdlock( &iscsi_globvec->portal_groups_rwlock );
-	rc = iscsi_hashmap_iterate( iscsi_globvec->portal_groups, iscsi_target_node_create_callback, (uint8_t *) target );
-	pthread_rwlock_unlock( &iscsi_globvec->portal_groups_rwlock );
-
-	if ( rc < 0 ) {
-		if ( hash_key != NULL ) {
-			pthread_rwlock_wrlock( &iscsi_globvec->devices_rwlock );
-			iscsi_hashmap_remove( iscsi_globvec->devices, hash_key, key_len );
-			pthread_rwlock_unlock( &iscsi_globvec->devices_rwlock );
-			iscsi_device_destroy( device );
-			iscsi_hashmap_key_destroy( hash_key );
-		} else {
-			pthread_rwlock_wrlock( &iscsi_globvec->devices_rwlock );
-
-			device->active_conns--;
-
-			pthread_rwlock_unlock( &iscsi_globvec->devices_rwlock );
-		}
-
-		if ( target->alias != NULL )
-			free( target->alias );
-
-		free( target->name );
-		free( target );
-
-		return NULL;
-	}
-
-	target->num           = index;
-	target->queue_depth   = queue_depth;
-	target->flags         = flags;
-	target->header_digest = header_digest;
-	target->data_digest   = data_digest;
-	target->chap_group    = chap_group;
-	target->active_conns  = 0UL;
-
-	return target;
-}
-
-/**
- * @brief iSCSI target node destructor callback for hash map.
- *
- * Callback function for deallocation of an iSCSI
- * target node stored in the hash map managing all
- * iSCSI target nodes.
- *
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] value Value of the key, NULL is allowed.
- * @param[in,out] user_data This argument is not used by
- * this function and should be always NULL for now, as
- * there is a possibility for future usage.
- * @return Always returns 0 as this function cannot fail.
- */
-int iscsi_target_node_destroy_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data)
-{
-	iscsi_target_node_destroy( (iscsi_target_node *) value );
-	iscsi_hashmap_key_destroy( key );
-
-	return 0;
-}
-
-/**
- * @brief Deallocates all resources acquired by iscsi_target_node_create.
- *
- * This function also frees the IQN name,
- * IQN alias and the associated SCSI device.
- *
- * @param[in] target Pointer to iSCSI target node to be freed.
- * May be NULL in which case this function
- * does nothing at all.
- */
-void iscsi_target_node_destroy(iscsi_target_node *target)
-{
-	if ( target != NULL ) {
-		if ( target->alias != NULL ) {
-			free( target->alias );
-
-			target->alias = NULL;
-		}
-
-		if ( target->name != NULL ) {
-			free( target->name );
-
-			target->name = NULL;
-		}
-
-		free( target );
-	}
-}
-
-/**
- * @brief Sends a buffer from a source iSCSI IQN to target iSCSI IQNs.
- *
- * This function sends a buffer starting from a
- * specified position to one, multiple or all
- * target IQNs.\n
- * This function also checks the input and output
- * IQN for conforming to iSCSI specifications.
- *
- * @param[in] conn Pointer to iSCSI connection to write the buffer.
- * @param[in] dst_iqn Pointer to string containing the target IQNs,
- * NULL is not allowed here, take caution.
- * @param[in] src_iqn Pointer to string containing the source IQN.
- * May NOT be NULL, so be careful.
- * @param[in] buf Pointer to output buffer.
- * @param[in] pos Position in buffer in bytes to start sending.
- * @param[in] len Length of buffer in bytes.
- * @return The new position of the written data or a
- * negative error code otherwise.
- */
-int32_t iscsi_target_node_send(iscsi_connection *conn, const uint8_t *dst_iqn, const uint8_t *src_iqn, uint8_t *buf, const uint32_t pos, const uint32_t len)
-{
-	// TODO: Implement function.
-
-	return -1;
-}
-
-/**
  * @brief Calculates the WWN using 64-bit IEEE Extended NAA for a name.
  *
  * @param[in] name Pointer to string containing the
@@ -8677,7 +2394,7 @@ int32_t iscsi_target_node_send(iscsi_connection *conn, const uint8_t *dst_iqn, c
  * @return A 64-bit unsigned integer for
  * storing the IEEE Extended NAA.
  */
-uint64_t iscsi_target_node_wwn_get(const uint8_t *name)
+static uint64_t iscsi_target_node_wwn_get(const uint8_t *name)
 {
 	uint64_t value      = 0ULL;
 	int i               = 0;
@@ -8692,257 +2409,6 @@ uint64_t iscsi_target_node_wwn_get(const uint8_t *name)
 }
 
 /**
- * @brief Extracts the DNBD3 image out of an iSCSI IQN string and opens the DNBD3 image.
- *
- * This function uses the : separator as
- * specified by the IQN standard.\n
- * If no colons are in the IQN string,
- * the complete string will be
- * considered the image file name.\n
- * The image file name is assumed
- * before the last colon and is
- * either directly opened or if
- * that fails, a WWN name by
- * IEEE Extended NAA is tried as
- * well.\n
- * The image revision is assumed
- * after the last colon.
- * @param[in] iqn Pointer to iSCSI IQN string. This
- * is not allowed to be NULL, so be careful.
- * @return Pointer to DNBD3 image if successful
- * operation or NULL if failed.
- */
-dnbd3_image_t *iscsi_target_node_image_get(uint8_t *iqn)
-{
-	uint8_t *image_name = iqn;
-	uint8_t *image_rev  = NULL;
-	uint8_t *tmp        = (uint8_t *) strchr( (char *) iqn, ':' );
-
-	while ( tmp != NULL ) {
-		tmp++;
-
-		if ( image_rev != NULL )
-			image_name = image_rev;
-
-		image_rev  = tmp;
-		tmp        = (uint8_t *) strchr( (char *) tmp, ':' );
-	}
-
-	if ( image_rev == NULL )
-		image_rev = image_name;
-
-	const uint len = (uint) (image_rev - image_name);
-
-	if ( len > 0U ) {
-		tmp = (uint8_t *) malloc( len );
-
-		if ( tmp == NULL ) {
-			logadd( LOG_ERROR, "iscsi_target_node_image_get: Out of memory while allocating DNBD3 image name for iSCSI target node" );
-
-			return NULL;
-		}
-
-		memcpy( tmp, image_name, (len - 1) );
-		tmp[len - 1] = '\0';
-	} else {
-		tmp = image_name;
-	}
-
-	const uint16_t rev   = (uint16_t) ((len > 0U) ? atoi( (char *) image_rev ) : 0);
-	dnbd3_image_t *image = image_getOrLoad( (char *) image_name, rev );
-
-	if ( image == NULL ) {
-		image = image_getOrLoad( (char *) tmp, rev );
-
-		if ( image == NULL ) {
-			if ( strncasecmp( (char *) image_name, ISCSI_TARGET_NODE_NAME_WWN_PREFIX, ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_WWN_PREFIX) ) == 0 ) {
-				uint64_t wwn = strtoull( (char *) (image_name + ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_WWN_PREFIX)), NULL, 16 );
-
-				image = image_getByWwn( wwn, rev, true );
-
-				if ( image == NULL ) {
-					wwn   = strtoull( (char *) (tmp + ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_WWN_PREFIX)), NULL, 16 );
-					image = image_getByWwn( wwn, rev, true );
-				}
-			} else if ( strncasecmp( (char *) image_name, ISCSI_TARGET_NODE_NAME_NAA_PREFIX, ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_NAA_PREFIX) ) == 0 ) {
-				uint64_t wwn = strtoull( (char *) (image_name + ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_NAA_PREFIX)), NULL, 16 );
-
-				image = image_getByWwn( wwn, rev, true );
-
-				if ( image == NULL ) {
-					wwn   = strtoull( (char *) (tmp + ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_NAA_PREFIX)), NULL, 16 );
-					image = image_getByWwn( wwn, rev, true );
-				}
-			} else if ( strncasecmp( (char *) image_name, ISCSI_TARGET_NODE_NAME_EUI_PREFIX, ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_EUI_PREFIX) ) == 0 ) {
-				uint64_t wwn = (0x2ULL << 60ULL) | (strtoull( (char *) (image_name + ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_EUI_PREFIX)), NULL, 16 ) & 0x0FFFFFFFFFFFFFFFULL);
-
-				image = image_getByWwn( wwn, rev, true );
-
-				if ( image == NULL ) {
-					wwn   = (0x2ULL << 60ULL) | (strtoull( (char *) (tmp + ISCSI_STRLEN(ISCSI_TARGET_NODE_NAME_EUI_PREFIX)), NULL, 16 ) & 0x0FFFFFFFFFFFFFFFULL);
-					image = image_getByWwn( wwn, rev, true );
-				}
-			}
-		}
-	}
-
-	if ( len > 0U )
-		free( tmp );
-
-	return image;
-}
-
-/**
- * @brief Finds an iSCSI target node by case insensitive name search.
- *
- * Callback function for each element while iterating
- * through the iSCSI target nodes.
- *
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] value Value of the key, NULL creates an
- * empty key assignment.
- * @param[in,out] user_data Pointer to a data structure
- * containing the iSCSI target node and the name to be
- * searched for and may NOT be NULL, so be careful.
- * @retval -1 The target node has been found and stored
- * in the result structure. Therefore, no further
- * searching is needed.
- * @retval 0 The target node has not been found yet.
- */
-int iscsi_target_node_find_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data)
-{
-	iscsi_target_node_find_name *target_find = (iscsi_target_node_find_name *) user_data;
-	iscsi_target_node *target                = (iscsi_target_node *) value;
-
-	if ( strcasecmp( (char *) target->name, (char *) target_find->name ) != 0 )
-		return 0;
-
-	target_find->target = target;
-
-	return -1;
-}
-
-/**
- * @brief Searches an iSCSI target node by name using case insensitive search.
- *
- * This function searches for an iSCSI target node
- * by iterating through the iSCSI global target node
- * hash map.
- *
- * @param[in] target_name Pointer to string containing the name
- * of the iSCSI target node to be searched for.
- * @return Pointer to found iSCSI target node or NULL
- * in case no iSCSI target node has a matching name.
- */
-iscsi_target_node *iscsi_target_node_find(uint8_t *target_name)
-{
-	if ( target_name == NULL )
-		return NULL;
-
-	iscsi_target_node_find_name target_find = {NULL, target_name};
-
-	pthread_rwlock_wrlock( &iscsi_globvec->target_nodes_rwlock );
-	iscsi_hashmap_iterate( iscsi_globvec->target_nodes, iscsi_target_node_find_callback, (uint8_t *) &target_find );
-
-	iscsi_target_node *target = target_find.target;
-
-	if ( target == NULL ) {
-		dnbd3_image_t *image = iscsi_target_node_image_get( target_name );
-
-		if ( image == NULL ) {
-			pthread_rwlock_unlock( &iscsi_globvec->target_nodes_rwlock );
-
-			return NULL;
-		}
-
-		target = iscsi_target_node_create( target_name, NULL, 0, image->rid, 16U, 0, 0L, 0, 0 );
-
-		if ( target == NULL ) {
-			logadd( LOG_ERROR, "iscsi_target_node_find: Out of memory while allocating iSCSI target node" );
-
-			pthread_rwlock_unlock( &iscsi_globvec->target_nodes_rwlock );
-
-			return NULL;
-		}
-
-		const uint key_len = (uint) (strlen( (char *) target_name ) + 1U);
-		uint8_t *hash_key  = iscsi_hashmap_key_create( target_name, key_len );
-
-		if ( hash_key == NULL ) {
-			logadd( LOG_ERROR, "iscsi_target_node_find: Out of memory while allocating iSCSI target node" );
-
-			pthread_rwlock_unlock( &iscsi_globvec->target_nodes_rwlock );
-			iscsi_target_node_destroy( target );
-
-			return NULL;
-		}
-
-		int rc = iscsi_hashmap_put( iscsi_globvec->target_nodes, (uint8_t *) hash_key, key_len, (uint8_t *) target );
-
-		if ( rc < 0 ) {
-			pthread_rwlock_unlock( &iscsi_globvec->target_nodes_rwlock );
-			iscsi_hashmap_key_destroy( (uint8_t *) hash_key );
-			iscsi_target_node_destroy( target );
-
-			return NULL;
-		}
-	}
-
-	target->active_conns++;
-
-	pthread_rwlock_unlock( &iscsi_globvec->target_nodes_rwlock );
-
-	return target;
-}
-
-/**
- * @brief Retrieves target node redirection address.
- *
- * This function checks whether the target node needs
- * a redirect and is used for informing the client
- * about a necessary redirection.
- *
- * @param[in] conn Pointer to iSCSI connection, may NOT
- * be NULL, so be careful.
- * @param[in] target Pointer to iSCSI target node where
- * NULL is NOT allowed, so take caution.
- * @return Pointer to redirect target address or NULL
- * if no redirection.
- */
-uint8_t *iscsi_target_node_get_redirect(iscsi_connection *conn, iscsi_target_node *target)
-{
-	// TODO: Implement function
-
-	return NULL;
-}
-
-/**
- * @brief Checks if target node is accessible.
- *
- * This function checks whether access is possible
- * to a specific iSCSI IQN and IP address.
- *
- * @param[in] conn Pointer to iSCSI connection which
- * may NOT be NULL, so be careful.
- * @param[in] target Pointer to iSCSI target node. NULL
- * is not allowed here, to take caution.
- * @param[in] iqn Pointer to iSCSI IQN string. This
- * is not allowed to be NULL, so be careful.
- * @param[in] adr Pointer to IP address, NULL is not
- * allowed, so take care.
- * @return 0 if access is possible, a negative error
- * code otherwise.
- */
-int iscsi_target_node_access(iscsi_connection *conn, iscsi_target_node *target, const uint8_t *iqn, const uint8_t *adr)
-{
-	// TODO: Implement access check function
-
-	return 0;
-}
-
-/**
  * @brief Creates and initializes an iSCSI session.
  *
  * This function creates and initializes all relevant
@@ -8952,14 +2418,13 @@ int iscsi_target_node_access(iscsi_connection *conn, iscsi_target_node *target,
  * login phase.
  *
  * @param[in] conn Pointer to iSCSI connection to associate with the session.
- * @param[in] target Pointer to iSCSI target node to assign with the session.
  * @param[in] type Session type to initialize the session with.
  * @return Pointer to initialized iSCSI session or NULL in case an error
  * occured (usually due to memory exhaustion).
  */
-iscsi_session *iscsi_session_create(iscsi_connection *conn, iscsi_target_node *target, const int type)
+static iscsi_session *iscsi_session_create(iscsi_connection *conn,  const int type)
 {
-	iscsi_session *session = (iscsi_session *) malloc( sizeof(struct iscsi_session) );
+	iscsi_session *session = malloc( sizeof(struct iscsi_session) );
 
 	if ( session == NULL ) {
 		logadd( LOG_ERROR, "iscsi_session_create: Out of memory allocating iSCSI session" );
@@ -8967,104 +2432,16 @@ iscsi_session *iscsi_session_create(iscsi_connection *conn, iscsi_target_node *t
 		return NULL;
 	}
 
-	session->tag   = conn->pg_tag;
-	session->flags = 0;
-
-	if ( (iscsi_globvec->flags & ISCSI_GLOBALS_FLAGS_INIT_R2T) != 0 )
-		session->flags |= ISCSI_SESSION_FLAGS_INIT_R2T;
-
-	if ( (iscsi_globvec->flags & ISCSI_GLOBALS_FLAGS_IMMEDIATE_DATA) != 0 )
-		session->flags |= ISCSI_SESSION_FLAGS_IMMEDIATE_DATA;
-
-	if ( (iscsi_globvec->flags & ISCSI_GLOBALS_FLAGS_DATA_PDU_IN_ORDER) != 0 )
-		session->flags |= ISCSI_SESSION_FLAGS_DATA_PDU_IN_ORDER;
-
-	if ( (iscsi_globvec->flags & ISCSI_GLOBALS_FLAGS_DATA_SEQ_IN_ORDER) != 0 )
-		session->flags |= ISCSI_SESSION_FLAGS_DATA_SEQ_IN_ORDER;
-
-	session->conns                  = 1UL;
-	session->max_conns              = iscsi_globvec->max_session_conns;
-	session->max_outstanding_r2t    = iscsi_globvec->max_outstanding_r2t;
-	session->default_time_to_wait   = iscsi_globvec->default_time_to_wait;
-	session->default_time_to_retain = iscsi_globvec->default_time_to_retain;
-	session->first_burst_len        = iscsi_globvec->first_burst_len;
-	session->max_burst_len          = iscsi_globvec->max_burst_len;
-	session->err_recovery_level     = iscsi_globvec->err_recovery_level;
-
-	iscsi_list_create( &session->conn_list );
-	iscsi_list_enqueue( &session->conn_list, &conn->node );
-
-	session->key_value_pairs = iscsi_hashmap_create( ((sizeof(iscsi_session_key_value_pair_lut) / sizeof(struct iscsi_key_value_pair_lut_entry)) - 1) );
-
-	if ( session->key_value_pairs == NULL ) {
-		logadd( LOG_ERROR, "iscsi_session_create: Out of memory allocating iSCSI session key and value pairs hash map" );
-
-		free( session );
-
-		return NULL;
-	}
-
-	session->target                     = target;
-	session->isid                       = 0ULL;
 	session->tsih                       = 0ULL;
-	session->queue_depth                = 0U;
 	session->type                       = type;
 	session->exp_cmd_sn                 = 0UL;
 	session->max_cmd_sn                 = 0UL;
 	session->current_text_init_task_tag = 0xFFFFFFFFUL;
 
-	int rc = iscsi_session_init_key_value_pairs( session->key_value_pairs );
-	rc    |= iscsi_update_int_key_value_pair( session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_CONNECTIONS, session->max_conns );
-	rc    |= iscsi_update_int_key_value_pair( session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_OUTSTANDING_R2T, session->max_outstanding_r2t );
-	rc    |= iscsi_update_int_key_value_pair( session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DEFAULT_TIME_WAIT, session->default_time_to_wait );
-	rc    |= iscsi_update_int_key_value_pair( session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DEFAULT_TIME_RETAIN, session->default_time_to_retain );
-	rc    |= iscsi_update_int_key_value_pair( session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_FIRST_BURST_LEN, session->first_burst_len );
-	rc    |= iscsi_update_int_key_value_pair( session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_BURST_LEN, session->max_burst_len );
-	rc    |= iscsi_update_bool_key_value_pair( session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_INITIAL_R2T, (session->flags & ISCSI_SESSION_FLAGS_INIT_R2T) );
-	rc    |= iscsi_update_bool_key_value_pair( session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_IMMEDIATE_DATA, (session->flags & ISCSI_SESSION_FLAGS_IMMEDIATE_DATA) );
-	rc    |= iscsi_update_bool_key_value_pair( session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DATA_PDU_IN_ORDER, (session->flags & ISCSI_SESSION_FLAGS_DATA_PDU_IN_ORDER) );
-	rc    |= iscsi_update_bool_key_value_pair( session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DATA_SEQ_IN_ORDER, (session->flags & ISCSI_SESSION_FLAGS_DATA_SEQ_IN_ORDER) );
-	rc    |= iscsi_update_int_key_value_pair( session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_ERR_RECOVERY_LEVEL, session->err_recovery_level );
-	rc    |= iscsi_update_int_key_value_pair( conn->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_RECV_DS_LEN, conn->max_recv_ds_len );
-
-	if ( rc != 0 ) {
-		logadd( LOG_ERROR, "iscsi_session_create: Out of memory adding iSCSI session key and integer value pair" );
-
-		iscsi_hashmap_iterate( session->key_value_pairs, iscsi_hashmap_key_destroy_value_callback, NULL );
-		iscsi_hashmap_destroy( session->key_value_pairs );
-		free( session );
-
-		return NULL;
-	}
-
 	return session;
 }
 
 /**
- * @brief iSCSI session destructor callback for hash map.
- *
- * Callback function for deallocation of an iSCSI
- * session stored in the hash map managing all iSCSI
- * sessions.
- *
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] value Value of the key, NULL is allowed.
- * @param[in,out] user_data This argument is not used by
- * this function and should be always NULL for now, as
- * there is a possibility for future usage.
- * @return Always returns 0 as this function cannot fail.
- */
-int iscsi_session_destroy_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data)
-{
-	iscsi_session_destroy( (iscsi_session *) value );
-	iscsi_hashmap_key_destroy( key );
-
-	return 0;
-}
-
-/**
  * @brief Deallocates all resources acquired by iscsi_session_create.
  *
  * This function also frees the associated key and value pairs,
@@ -9074,80 +2451,9 @@ int iscsi_session_destroy_callback(uint8_t *key, const size_t key_size, uint8_t
  * @param[in] session Pointer to iSCSI session to be freed.
  * May be NULL in which case this function does nothing at all.
  */
-void iscsi_session_destroy(iscsi_session *session)
+static void iscsi_session_destroy(iscsi_session *session)
 {
-	if ( session != NULL ) {
-		session->tag    = 0ULL;
-		session->target = NULL;
-		session->type   = ISCSI_SESSION_TYPE_INVALID;
-
-		if ( session->key_value_pairs != NULL ) {
-			iscsi_hashmap_iterate( session->key_value_pairs, iscsi_hashmap_key_destroy_value_callback, NULL );
-			iscsi_hashmap_destroy( session->key_value_pairs );
-
-			session->key_value_pairs = NULL;
-		}
-
-		iscsi_connection *conn;
-		iscsi_connection *tmp;
-
-		iscsi_list_foreach_safe_node ( &session->conn_list, conn, tmp ) {
-			iscsi_list_remove( &conn->node );
-			iscsi_connection_destroy( conn );
-		}
-
-		if ( session->init_port != NULL ) {
-			iscsi_port_destroy( session->init_port );
-
-			session->init_port = NULL;
-		}
-
-		free( session ); // TODO: Check if potential reusage of session makes sense.
-	}
-}
-
-/**
- * @brief Initializes a key and value pair hash table with default values.
- *
- * This function is used by iSCSI connections and
- * sessions with default values for required keys.\n
- * The iSCSI global key and value pair allowed
- * values and ranges for fast
- * access
- *
- * @param[in] key_value_pairs Pointer to key and value pair hash map
- * which should store all the default values for
- * its keys and may NOT be NULL, so take caution.
- * @param[in] lut Lookup table to use for initialization.
- * NULL is not allowed here, so be careful.
- * @return 0 on success, a negative error code otherwise.
- */
-static int iscsi_init_key_value_pairs(iscsi_hashmap *key_value_pairs, const iscsi_key_value_pair_lut_entry *lut)
-{
-	for ( uint i = 0U; lut[i].key != NULL; i++ ) {
-		const int rc = iscsi_add_key_value_pair( key_value_pairs, lut[i].key, lut[i].value );
-
-		if ( rc < 0 )
-			return rc;
-	}
-
-	return 0;
-}
-
-/**
- * @brief Initializes a key and value pair hash table with default values for an iSCSI session.
- *
- * This function only initializes the default key
- * and value pairs used by iSCSI sessions.
- *
- * @param[in] key_value_pairs Pointer to key and value pair hash map
- * which should store all the default values for
- * its keys and may NOT be NULL, so take caution.
- * @return 0 on success, a negative error code otherwise.
- */
-int iscsi_session_init_key_value_pairs(iscsi_hashmap *key_value_pairs)
-{
-	return iscsi_init_key_value_pairs( key_value_pairs, &iscsi_session_key_value_pair_lut[0] );
+	free( session );
 }
 
 /**
@@ -9156,15 +2462,13 @@ int iscsi_session_init_key_value_pairs(iscsi_hashmap *key_value_pairs)
  * Creates a data structure for incoming iSCSI connection
  * requests from iSCSI packet data.
  *
- * @param[in] portal Pointer to iSCSI portal to associate the
- * connection with.
- * @param[in] sock TCP/IP socket to associate the connection with.
+ * @param[in] client dnbd3 client to associate the connection with.
  * @return Pointer to initialized iSCSI connection structure or NULL in
  * case of an error (invalid iSCSI packet data or memory exhaustion).
  */
-iscsi_connection *iscsi_connection_create(iscsi_portal *portal, const int sock)
+static iscsi_connection *iscsi_connection_create(dnbd3_client_t *client)
 {
-	iscsi_connection *conn = (iscsi_connection *) malloc( sizeof(struct iscsi_connection) );
+	iscsi_connection *conn = malloc( sizeof(struct iscsi_connection) );
 
 	if ( conn == NULL ) {
 		logadd( LOG_ERROR, "iscsi_create_connection: Out of memory while allocating iSCSI connection" );
@@ -9172,187 +2476,27 @@ iscsi_connection *iscsi_connection_create(iscsi_portal *portal, const int sock)
 		return NULL;
 	}
 
-	conn->session         = NULL;
-	conn->key_value_pairs = iscsi_hashmap_create( ((sizeof(iscsi_connection_key_value_pair_lut) / sizeof(struct iscsi_key_value_pair_lut_entry)) - 1) );
-
-	if ( conn->key_value_pairs == NULL ) {
-		logadd( LOG_ERROR, "iscsi_create_connection: Out of memory while allocating iSCSI login text key / value pair hash map" );
-
-		free( conn );
-
-		return NULL;
-	}
-
-	const int rc = iscsi_connection_init_key_value_pairs( conn->key_value_pairs );
-
-	if ( rc < 0 ) {
-		iscsi_hashmap_iterate( conn->key_value_pairs, iscsi_hashmap_key_destroy_value_callback, NULL );
-		iscsi_hashmap_destroy( conn->key_value_pairs );
-		free( conn );
-
-		return NULL;
-	}
-
-	conn->partial_pairs        = NULL;
-	conn->text_key_value_pairs = iscsi_hashmap_create( ((sizeof(iscsi_connection_key_value_pair_lut) / sizeof(struct iscsi_key_value_pair_lut_entry)) - 1) );
-
-	if ( conn->text_key_value_pairs == NULL ) {
-		logadd( LOG_ERROR, "iscsi_create_connection: Out of memory while allocating iSCSI text key / value pair hash map" );
-
-		iscsi_hashmap_iterate( conn->key_value_pairs, iscsi_hashmap_key_destroy_value_callback, NULL );
-		iscsi_hashmap_destroy( conn->key_value_pairs );
-		free( conn );
-
-		return NULL;
-	}
-
-	conn->text_partial_pairs = NULL;
-	conn->device             = NULL;
-	conn->init_port          = NULL;
-	conn->init_name          = NULL;
-	conn->init_adr           = NULL;
-	conn->target             = NULL;
-	conn->target_port        = NULL;
-	conn->target_name_short  = NULL;
-	conn->portal_host        = NULL;
-	conn->portal_port        = NULL;
-	conn->pdu_processing     = NULL;
-
-	iscsi_list_create( &conn->scsi_data_in_queued_tasks );
-
-	conn->login_response_pdu = NULL;
-
-	iscsi_list_create( &conn->pdus_write );
-	iscsi_list_create( &conn->pdus_snack );
-	iscsi_list_create( &conn->r2t_tasks_active );
-	iscsi_list_create( &conn->r2t_tasks_queue );
-
-	conn->target_send_total_size   = 0U;
-	conn->scsi_data_in_cnt         = 0U;
-	conn->scsi_data_out_cnt        = 0U;
-	conn->task_cnt                 = 0U;
-	conn->r2t_pending              = 0U;
-	conn->header_digest            = 0;
-	conn->data_digest              = 0;
+	conn->session                  = NULL;
+	conn->pdu_processing           = NULL;
+	conn->login_response_pdu       = NULL;
 	conn->id                       = 0;
-	conn->sock                     = sock;
+	conn->client                   = client;
 	conn->pdu_recv_state           = ISCSI_CONNECT_PDU_RECV_STATE_WAIT_PDU_READY;
 	conn->flags                    = 0;
 	conn->state                    = ISCSI_CONNECT_STATE_INVALID;
 	conn->login_phase              = ISCSI_LOGIN_RESPONSE_FLAGS_NEXT_STAGE_SECURITY_NEGOTIATION;
-	conn->max_recv_ds_len          = ISCSI_DEFAULT_RECV_DS_LEN;
-	conn->pg_tag                   = portal->group->tag;
-	conn->isid.a                   = 0;
-	conn->isid.b                   = 0;
-	conn->isid.c                   = 0;
-	conn->isid.d                   = 0;
 	conn->tsih                     = 0U;
 	conn->cid                      = 0U;
 	conn->state_negotiated         = 0U;
 	conn->session_state_negotiated = 0UL;
 	conn->init_task_tag            = 0UL;
 	conn->target_xfer_tag          = 0UL;
-	conn->auth_chap.phase          = ISCSI_AUTH_CHAP_PHASE_NONE;
-	conn->chap_group               = 0L;
 	conn->stat_sn                  = 0UL;
-	conn->exp_stat_sn              = 0UL;
-
-	iscsi_list_create( &conn->exec_queue );
-
-	conn->stat_iscsi_opcodes = iscsi_hashmap_create( 256U );
-
-	if ( conn->stat_iscsi_opcodes == NULL ) {
-		logadd( LOG_ERROR, "iscsi_create: Out of memory while initializing iSCSI global vector iSCSI opcode statistics" );
-
-		iscsi_hashmap_destroy( conn->text_key_value_pairs );
-		iscsi_hashmap_iterate( conn->key_value_pairs, iscsi_hashmap_key_destroy_value_callback, NULL );
-		iscsi_hashmap_destroy( conn->key_value_pairs );
-		free( conn );
-
-		return NULL;
-	}
-
-	conn->stat_scsi_opcodes = iscsi_hashmap_create( 256U );
-
-	if ( conn->stat_scsi_opcodes == NULL ) {
-		logadd( LOG_ERROR, "iscsi_create: Out of memory while initializing iSCSI global vector iSCSI SCSI opcode statistics" );
-
-		iscsi_hashmap_destroy( conn->stat_iscsi_opcodes );
-		iscsi_hashmap_destroy( conn->text_key_value_pairs );
-		iscsi_hashmap_iterate( conn->key_value_pairs, iscsi_hashmap_key_destroy_value_callback, NULL );
-		iscsi_hashmap_destroy( conn->key_value_pairs );
-		free( conn );
-
-		return NULL;
-	}
 
 	return conn;
 }
 
 /**
- * @brief Deallocates all pending iSCSI tasks and PDUs associated with an iSCSI connection.
- *
- * This function only removes tasks which are
- * not enqueued.
- *
- * @param[in] conn Pointer to iSCSI connection of which to
- * deallocate all the tasks and PDUs. May NOT
- * be NULL, so be careful.
- */
-static int iscsi_connection_tasks_destroy(iscsi_connection *conn)
-{
-	iscsi_pdu *pdu;
-	iscsi_pdu *tmp_pdu;
-
-	iscsi_list_foreach_safe_node ( &conn->pdus_snack, pdu, tmp_pdu ) {
-		iscsi_list_remove( &pdu->node );
-		iscsi_connection_pdu_destroy( pdu );
-	}
-
-	iscsi_task *task;
-	iscsi_task *tmp_task;
-
-	iscsi_list_foreach_safe_node ( &conn->scsi_data_in_queued_tasks, task, tmp_task ) {
-		if ( (task->flags & ISCSI_TASK_FLAGS_QUEUED) != 0 )
-			continue;
-
-		iscsi_list_remove( &task->node );
-		iscsi_task_destroy( task );
-	}
-
-	iscsi_list_foreach_safe_node ( &conn->pdus_write, pdu, tmp_pdu ) {
-		iscsi_list_remove( &pdu->node );
-		iscsi_connection_pdu_destroy( pdu );
-	}
-
-	return ((conn->task_cnt != 0) ? -1 : 0);
-}
-
-/**
- * @brief iSCSI connection destructor callback for hash map.
- *
- * Callback function for deallocation of an iSCSI
- * connection stored in the hash map managing all
- * iSCSI connections.
- *
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] value Value of the key, NULL is allowed.
- * @param[in,out] user_data This argument is not used by
- * this function and should be always NULL for now, as
- * there is a possibility for future usage.
- * @return Always returns 0 as this function cannot fail.
- */
-int iscsi_connection_destroy_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data)
-{
-	iscsi_connection_destroy( (iscsi_connection *) value );
-	iscsi_hashmap_key_destroy( key );
-
-	return 0;
-}
-
-/**
  * @brief Deallocates all resources acquired by iscsi_connection_create.
  *
  * Deallocates a data structure of an iSCSI connection
@@ -9365,144 +2509,16 @@ int iscsi_connection_destroy_callback(uint8_t *key, const size_t key_size, uint8
  * function, use iscsi_connection_close for this. This may be
  * NULL in which case this function does nothing.
  */
-void iscsi_connection_destroy(iscsi_connection *conn)
+static void iscsi_connection_destroy(iscsi_connection *conn)
 {
 	if ( conn != NULL ) {
-		iscsi_hashmap_iterate( conn->stat_scsi_opcodes, iscsi_hashmap_key_destroy_value_callback, NULL );
-		iscsi_hashmap_destroy( conn->stat_scsi_opcodes );
-		conn->stat_scsi_opcodes = NULL;
-
-		iscsi_hashmap_iterate( conn->stat_iscsi_opcodes, iscsi_hashmap_key_destroy_value_callback, NULL );
-		iscsi_hashmap_destroy( conn->stat_iscsi_opcodes );
-		conn->stat_iscsi_opcodes = NULL;
-
-		iscsi_task *task;
-		iscsi_task *tmp;
-
-		iscsi_list_foreach_safe_node ( &conn->r2t_tasks_queue, task, tmp ) {
-			iscsi_list_remove( &task->node );
-			iscsi_task_destroy( task );
-		}
-
-		iscsi_list_foreach_safe_node ( &conn->r2t_tasks_active, task, tmp ) {
-			iscsi_list_remove( &task->node );
-			iscsi_task_destroy( task );
-		}
-
-		iscsi_pdu *pdu;
-		iscsi_pdu *tmp_pdu;
-
-		iscsi_list_foreach_safe_node ( &conn->pdus_snack, pdu, tmp_pdu ) {
-			iscsi_list_remove( &pdu->node );
-			iscsi_connection_pdu_destroy( pdu );
-		}
-
-		iscsi_list_foreach_safe_node ( &conn->pdus_write, pdu, tmp_pdu ) {
-			iscsi_list_remove( &pdu->node );
-			iscsi_connection_pdu_destroy( pdu );
-		}
-
-		iscsi_list_foreach_safe_node ( &conn->scsi_data_in_queued_tasks, task, tmp ) {
-			iscsi_list_remove( &task->node );
-			iscsi_task_destroy( task );
-		}
-
-		if ( conn->pdu_processing != NULL ) {
-			iscsi_connection_pdu_destroy( conn->pdu_processing );
-
-			conn->pdu_processing = NULL;
-		}
-
-		if ( conn->portal_port != NULL ) {
-			free( conn->portal_port );
-
-			conn->portal_port = NULL;
-		}
-
-		if ( conn->portal_host != NULL ) {
-			free( conn->portal_host );
-
-			conn->portal_host = NULL;
-		}
-
-		if ( conn->target_name_short != NULL ) {
-			free( conn->target_name_short );
-
-			conn->target_name_short = NULL;
-		}
-
-		if ( conn->init_adr != NULL ) {
-			free( conn->init_adr );
-
-			conn->init_adr = NULL;
-		}
-
-		if ( conn->init_name != NULL ) {
-			free( conn->init_name );
-
-			conn->init_name = NULL;
-		}
-
-		if ( conn->text_partial_pairs != NULL ) {
-			free( conn->text_partial_pairs );
-
-			conn->text_partial_pairs = NULL;
-		}
-
-		if ( conn->text_key_value_pairs != NULL ) {
-			iscsi_hashmap_iterate( conn->text_key_value_pairs, iscsi_hashmap_key_destroy_value_callback, NULL );
-			iscsi_hashmap_destroy( conn->text_key_value_pairs );
-
-			conn->text_key_value_pairs = NULL;
-		}
-
-		if ( conn->partial_pairs != NULL ) {
-			free( conn->partial_pairs );
-
-			conn->partial_pairs = NULL;
-		}
-
-		if ( conn->key_value_pairs != NULL ) {
-			iscsi_hashmap_iterate( conn->key_value_pairs, iscsi_hashmap_key_destroy_value_callback, NULL );
-			iscsi_hashmap_destroy( conn->key_value_pairs );
-
-			conn->key_value_pairs = NULL;
-		}
-
+		iscsi_session_destroy( conn->session );
+		iscsi_connection_pdu_destroy( conn->pdu_processing );
 		free( conn );
 	}
 }
 
 /**
- * @brief Drops all connections based on matching pattern.
- *
- * @param[in] conn Pointer to iSCSI connection which may
- * NOT be NULL, so be careful.
- * @param[in] conn_match Pointer to match string, NULL is
- * not allowd here, so take caution.
- * @param[in] all Non-zero number indicating removing all
- * connections.
- * @return 0 on success, a negative error code otherwise.
- */
-int iscsi_connection_drop(iscsi_connection *conn, const uint8_t *conn_match, const int all)
-{
-	// TODO: Implement function.
-
-	return 0;
-}
-
-/**
- * @brief Schedules an iSCSI connection.
- *
- * @param[in] conn Pointer to ISCSI connection to be
- * scheduled. May NOT be NULL, so be careful.
- */
-void iscsi_connection_schedule(iscsi_connection *conn)
-{
-	// TODO: Implement function.
-}
-
-/**
  * @brief Reads data for the specified iSCSI connection from its TCP socket.
  *
  * The TCP socket is marked as non-blocking, so this function
@@ -9514,176 +2530,19 @@ void iscsi_connection_schedule(iscsi_connection *conn)
  *
  * Otherwise returns the number of bytes successfully read.
  */
-int32_t iscsi_connection_read(const iscsi_connection *conn, uint8_t *buf, const uint32_t len)
+static int32_t iscsi_connection_read(const iscsi_connection *conn, uint8_t *buf, const uint32_t len)
 {
 	if ( len == 0UL )
 		return 0L;
 
-	const int32_t rc = (int32_t) recv( conn->sock, buf, (size_t) len, MSG_WAITALL );
-
-	return ((rc > 0L) ? rc : (int32_t) ISCSI_CONNECT_PDU_READ_ERR_FATAL);
-}
-
-/**
- * @brief Writes data for the specified iSCSI connection to its TCP socket.
- *
- * The TCP socket is marked as non-blocking, so this function may not read
- * all data requested.
- *
- * Returns ISCSI_CONNECT_PDU_READ_ERR_FATAL if the operation
- * indicates a fatal error with the TCP connection (including
- * if the TCP connection was closed unexpectedly).
- *
- * Otherwise returns the number of bytes successfully written.
- */
-int32_t iscsi_connection_write(const iscsi_connection *conn, uint8_t *buf, const uint32_t len)
-{
-	if ( len == 0UL )
-		return 0L;
-
-	const int32_t rc = (int32_t) sock_sendAll( conn->sock, buf, (size_t) len, ISCSI_CONNECT_SOCKET_WRITE_RETRIES );
-
-	return ((rc > 0L) ? rc : (int32_t) ISCSI_CONNECT_PDU_READ_ERR_FATAL);
-}
-
-/**
- * @brief This function handles all queued iSCSI SCSI Data In tasks.
- *
- * This function also creates a sub task
- * if the data transfer length exceeds
- * the maximum allowed chunk size.
- *
- * @param[in] conn Pointer to iSCSI connection of which the
- * queued SCSI Data In tasks should be
- * handled. May NOT be NULL, so be careful.
- * @return 0 on successful task handling, a
- * negative error code otherwise.
- */
-int iscsi_connection_handle_scsi_data_in_queued_tasks(iscsi_connection *conn)
-{
-	while ( !iscsi_list_empty( &conn->scsi_data_in_queued_tasks ) && (conn->scsi_data_in_cnt < ISCSI_DEFAULT_MAX_DATA_IN_PER_CONNECTION) ) {
-		iscsi_task *task = (iscsi_task *) iscsi_list_peek( &conn->scsi_data_in_queued_tasks );
-
-		if ( task->pos < task->scsi_task.xfer_len ) {
-			const uint32_t len   = (task->scsi_task.xfer_len - task->pos);
-			iscsi_task *sub_task = iscsi_task_create( conn, task, iscsi_scsi_task_xfer_complete );
-
-			if ( sub_task == NULL )
-				return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-
-			sub_task->scsi_task.buf = NULL;
-			sub_task->scsi_task.pos = task->pos;
-
-			pthread_rwlock_rdlock( &conn->device->luns_rwlock );
-
-			if ( iscsi_device_find_lun( conn->device, task->lun_id ) == NULL ) {
-				pthread_rwlock_unlock( &conn->device->luns_rwlock );
-
-				iscsi_list_remove( &task->node );
-
-				task->pos                   += len;
-				sub_task->scsi_task.len      = 0UL;
-				sub_task->scsi_task.xfer_len = len;
-
-				iscsi_scsi_task_lun_process_none( &sub_task->scsi_task );
-				iscsi_scsi_task_xfer_complete( &sub_task->scsi_task );
-
-				return ISCSI_CONNECT_PDU_READ_OK;
-			}
-
-			pthread_rwlock_unlock( &conn->device->luns_rwlock );
-
-			sub_task->scsi_task.len = ((len < ISCSI_DEFAULT_MAX_RECV_DS_LEN) ? len : ISCSI_DEFAULT_MAX_RECV_DS_LEN);
-			task->pos              += sub_task->scsi_task.len;
-
-			iscsi_task_queue( conn, sub_task );
-		}
-
-		if ( task->pos == task->scsi_task.xfer_len )
-			iscsi_list_remove( &task->node );
-	}
-
-	return ISCSI_CONNECT_PDU_READ_OK;
-}
-
-/**
- * @brief Initializes a key and value pair hash table with default values for an iSCSI connection.
- *
- * This function only initializes the default key
- * and value pairs used by iSCSI connectionss.
- *
- * @param[in] key_value_pairs Pointer to key and value pair hash map
- * which should store all the default values for
- * its keys and may NOT be NULL, so take caution.
- * @return 0 on success, a negative error code otherwise.
- */
-int iscsi_connection_init_key_value_pairs(iscsi_hashmap *key_value_pairs)
-{
-	return iscsi_init_key_value_pairs( key_value_pairs, &iscsi_connection_key_value_pair_lut[0] );
-}
-
-/**
- * @brief Appends a special key and value pair to DataSegment packet data.
- *
- * This function adds MaxRecvDataSegmentLength,
- * FirstBurstLength and MaxBurstLength, which
- * require special handling to an output
- * DataSegment buffer and truncates if
- * necessary.
- *
- * @param[in] conn Pointer to iSCSI connection to handle the
- * special key and value pair for. NULL is
- * a forbidden value here, so take caution.
- * @param[in] key_value_pair Pointer to special key and value pair
- * containing its attributes.
- * @param[in] key Pointer to special key to be written to
- * output buffer. NULL is NOT allowed,
- * take caution.
- * @param[in] buf Pointer to output buffer to write the
- * special key and value pair to. NULL is
- * prohibited, so be careful.
- * @param[in] pos Position of buffer in bytes to start
- * writing to.
- * @param[in] len Total length of buffer in bytes.
- * @return New buffer position in bytes or a negative
- * error code.
- */
-static int32_t iscsi_append_special_key_value_pair_packet(iscsi_connection *conn, iscsi_key_value_pair *key_value_pair, const uint8_t *key, uint8_t *buf, uint32_t pos, const uint32_t len)
-{
-	if ( key_value_pair == NULL )
-		return pos;
-
-	if ( (key_value_pair->flags & ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_OVERRIDE_DEFAULT) != 0 ) {
-		if ( pos >= len )
-			return -1L;
-
-		pos += (uint32_t) (snprintf( (char *) (buf + pos), (len - pos), "%s=%" PRId32, key, (uint32_t) ISCSI_DEFAULT_MAX_RECV_DS_LEN ) + 1);
-	}
-
-	if ( (key_value_pair->flags & ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_USE_OTHER_MAX_VALUE) != 0 ) {
-		if ( pos >= len )
-			return -1L;
-
-		uint8_t *first_burst_len_val = NULL;
-		int rc = iscsi_get_key_value_pair( conn->session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_FIRST_BURST_LEN, &first_burst_len_val );
-		uint32_t first_burst_len = ((rc < 0) ? iscsi_globvec->first_burst_len : (uint32_t) atol( (char *) first_burst_len_val ));
-
-		uint8_t *max_burst_len_val;
-		rc = iscsi_get_key_value_pair( conn->session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_BURST_LEN, &max_burst_len_val );
-		uint32_t max_burst_len = ((rc < 0) ? iscsi_globvec->max_burst_len : (uint32_t) atol( (char *) max_burst_len_val ));
-
-		if ( first_burst_len > max_burst_len ) {
-			first_burst_len = max_burst_len;
-
-			if ( first_burst_len_val != NULL ) {
-				sprintf( (char *) first_burst_len_val, "%" PRId32, first_burst_len );
-			}
-		}
-
-		pos += (uint32_t) (snprintf( (char *) (buf + pos), (len - pos), "%s=%" PRId32, key, first_burst_len ) + 1);
-	}
+	int32_t rc;
+	do {
+		rc = (int32_t) recv( conn->client->sock, buf, (size_t) len, MSG_WAITALL );
+	} while ( rc == -1 && errno == EINTR );
 
-	return pos;
+	if ( rc == 0 )
+		return -1; // EOF
+	return rc;
 }
 
 /**
@@ -9693,8 +2552,7 @@ static int32_t iscsi_append_special_key_value_pair_packet(iscsi_connection *conn
  * and value pair to an output DataSegment
  * buffer and truncates if necessary.
  *
- * @param[in] key_value_pair Pointer to key and value pair containing
- * its attributes.
+ * @param[in] number true = int, false = char*
  * @param[in] key Pointer to key to be written to output
  * buffer. NULL is NOT allowed, take caution.
  * @param[in] value Pointer to value of the key that should
@@ -9705,529 +2563,25 @@ static int32_t iscsi_append_special_key_value_pair_packet(iscsi_connection *conn
  * prohibited, so be careful.
  * @param[in] pos Position of buffer in bytes to start
  * writing to.
- * @param[in] len Total length of buffer in bytes.
- * @return New buffer position in bytes or a negative
- * error code.
- */
-static int32_t iscsi_append_key_value_pair_packet(const iscsi_key_value_pair *key_value_pair, const uint8_t *key, const uint8_t *value, uint8_t *buf, uint32_t pos, const uint32_t len)
-{
-	if ( (key_value_pair == NULL) || ((key_value_pair->type != ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_DECLARATIVE) && (key_value_pair->type != ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_NUM_DECLARATIVE)) ) {
-		if ( pos >= len )
-			return -1L;
-
-		pos += (uint32_t) (snprintf( (char *) (buf + pos), (len - pos), "%s=%s", key, value ) + 1);
-	}
-
-	return pos;
-}
-
-/**
- * @brief Negotiates key and value pair of list type.
- *
- * This function checks if a key of list type has a
- * valid value according to the iSCSI specification.
- *
- * @param[in] key_value_pair Pointer to key and value pair. May NOT
- * be NULL, so be careful.
- * @param[in] old_value Pointer to string containing the old
- * value. NULL is not allowed, so take caution.
- * @return Pointer to original value, if the value is
- * allowed or NULL otherwise.
+ * @param[in] buflen Total length of buffer in bytes.
+ * @return -1 if buffer is already full, otherwise the number
+ * of bytes that are written or would have been written to
+ * the buffer.
  */
-static uint8_t *iscsi_negotiate_key_value_pair_list(const iscsi_key_value_pair *key_value_pair, const uint8_t *old_value)
+static int iscsi_append_key_value_pair_packet(const bool number, const char *key, const char *value, char *buf, const uint32_t pos, const uint32_t buflen)
 {
-	uint8_t *list        = key_value_pair->list_range;
-	const uint8_t *value = (uint8_t *) strchr( (char *) old_value, ',' );
-	size_t val_len       = ((value != NULL) ? (size_t) (value - old_value) : strlen( (char *) old_value ));
-
-	for ( ;; ) {
-		const size_t len  = strlen( (char *) list );
-
-		if ( (val_len == len) && (strncasecmp( (char *) list, (char *) old_value, len ) == 0) )
-			return list;
-
-		list += (len + 1);
-
-		if ( list[0] == '\0' ) {
-			if ( value == NULL )
-				break;
-
-			old_value = value;
-			list      = key_value_pair->list_range;
-			value     = (uint8_t *) strchr( (char *) ++old_value, ',' );
-			val_len   = ((value != NULL) ? (size_t) (value - old_value) : strlen( (char *) old_value ));
-		}
-	}
-
-	return NULL;
-}
-
-/**
- * @brief Negotiates key and value pair of numeric type.
- *
- * This function checks if a key of numeric type has
- * a valid interger value and clamps within the
- * allowed minimum and maximum range according to
- * the iSCSI specification.
- *
- * @param[in] key_value_pair Pointer to key and value pair. May NOT
- * be NULL, so be careful.
- * @param[in] old_value Pointer to string containing the old
- * value. NULL is not allowed, take caution.
- * @param[in] value Pointer to string containing the current
- * value which may NOT be NULL, so be careful.
- * @return Pointer to original value, if the value is
- * allowed or NULL otherwise.
- */
-static uint8_t *iscsi_negotiate_key_value_pair_num(const iscsi_key_value_pair *key_value_pair, uint8_t *old_value, uint8_t *value)
-{
-	int32_t old_int_val = (int32_t) atol( (char *) key_value_pair->value );
-
-	if ( (key_value_pair->flags & ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_USE_PREVIOUS_VALUE) != 0 )
-		old_int_val = (int32_t) atol( (char *) old_value );
-
-	int32_t int_val = (int32_t) atol( (char *) value );
-
-	const uint8_t *range    = key_value_pair->list_range;
-	const int32_t range_min = (int32_t) atol( (char *) range );
-	const int32_t range_max = (int32_t) atol( (char *) (range + strlen( (char *) range ) + 1) );
-
-	if ( (old_int_val < range_min) || (old_int_val > range_max) )
-		return NULL;
-
-	switch ( key_value_pair->type ) {
-		case ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_NUM_MIN : {
-			if ( old_int_val > int_val )
-				old_int_val = int_val;
-
-			break;
-		}
-		case ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_NUM_MAX : {
-			if ( old_int_val < int_val )
-				old_int_val = int_val;
-
-			break;
-		}
-		default : {
-			return old_value;
-
-			break;
-		}
-	}
-
-	sprintf( (char *) old_value, "%" PRId32, old_int_val );
-
-	return old_value;
-}
-
-/**
- * @brief Negotiates key and value pair of boolean type.
- *
- * This function checks if a key of boolean type
- * has a valid value according to the iSCSI
- * specification and also applies the boolean
- * OR / AND function to the current value.
- *
- * @param[in] key_value_pair Pointer to key and value pair. May NOT
- * be NULL, so be careful.
- * @param[in] old_value Pointer to string containing the old
- * value. NULL is not allowed, so take caution.
- * @param[in] value Pointer to string containing the
- * current value which may NOT be NULL, so be
- * careful.
- * @param[in] bool_value Pointer to string containing the
- * boolean OR / AND value where NULL is
- * prohibited, so take caution.
- * @param[out] update_key_value_pair Pointer to integer which
- * marks if the key and value pair should be
- * updated. May NOT be NULL, so be careful.
- * @return Pointer to either boolean AND / OR result,
- * default value or NULL in case of invalid
- * boolean value.
- */
-static uint8_t *iscsi_negotiate_key_value_pair_bool(const iscsi_key_value_pair *key_value_pair, uint8_t *old_value, uint8_t *value, uint8_t *bool_value, int *update_key_value_pair)
-{
-	const uint8_t *list_bool_true  = key_value_pair->list_range;
-	const uint8_t *list_bool_false = list_bool_true + strlen( (char *) list_bool_true ) + 1UL;
-
-	if ( (strcasecmp( (char *) old_value, (char *) list_bool_true ) != 0) && (strcasecmp( (char *) old_value, (char *) list_bool_false ) != 0) ) {
-		*update_key_value_pair = 0;
-
-		return (uint8_t *) "Reject";
-	}
-
-	return ((strcasecmp( (char *) value, (char *) bool_value ) == 0) ? bool_value : old_value);
-}
-
-/**
- * @brief Negotiates key and value pair of all types.
- *
- * This function determines the key type and
- * calls the suitable negotation handler
- * for checking iSCSI standard compliance.
- *
- * @param[in] key_value_pair Pointer to key and value pair. May NOT
- * be NULL, so be careful.
- * @param[in] old_value Pointer to string containing the old
- * value. NULL is not allowed, so take caution.
- * @param[in] value Pointer to string containing the
- * current value which may NOT be NULL, so be
- * careful.
- * @param[out] update_key_value_pair Pointer to integer which
- * marks if the key and value pair should be
- * updated. NULL is not allowed, take caution.
- * @return Pointer to new negotiated value or NULL
- * in case of an invalid negation status.
- */
-static uint8_t *iscsi_negotiate_key_value_pair_all(const iscsi_key_value_pair *key_value_pair, uint8_t *old_value, uint8_t *value, int *update_key_value_pair)
-{
-	switch ( key_value_pair->type ) {
-		case ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_LIST : {
-			return iscsi_negotiate_key_value_pair_list( key_value_pair, old_value );
-
-			break;
-		}
-		case ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_NUM_MIN :
-		case ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_NUM_MAX :
-		case ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_NUM_DECLARATIVE : {
-			return iscsi_negotiate_key_value_pair_num( key_value_pair, old_value, value );
-
-			break;
-		}
-		case ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_BOOL_AND : {
-			return iscsi_negotiate_key_value_pair_bool( key_value_pair, old_value, value, key_value_pair->list_range, update_key_value_pair );
-
-			break;
-		}
-		case ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_BOOL_OR : {
-			uint8_t *list_bool_true  = key_value_pair->list_range;
-			uint8_t *list_bool_false = list_bool_true + strlen( (char *) list_bool_true ) + 1UL;
-
-			return iscsi_negotiate_key_value_pair_bool( key_value_pair, old_value, value, list_bool_false, update_key_value_pair );
-
-			break;
-		}
-		default : {
-			break;
-		}
-	}
-
-	return key_value_pair->value;
-}
-
-/**
- * @brief Negotiates either iSCSI session or connection state.
- *
- * This function checks and sets the state mask
- * of either an iSCSI connection or session
- * key and value pair.
- *
- * @param[in] conn Pointer to iSCSI connection of which to
- * determine the key type. NULL is NOT allowed,
- * so be careful.
- * @param[in] key_value_pair Pointer to key and value pair
- * containing the key and value pair attributes.
- * NULL is NOT allowed, so be careful.
- * @param[in] type Type of key and value pair to negotiate.
- * 0 is iSCSI connection key and value pair,
- * any other value indicates an iSCSI session
- * key and value pair.
- * @return 0 on successful state negotation, a
- * negative error code otherwise.
- */
-static int iscsi_negotiate_key_value_pairs_state(iscsi_connection *conn, const iscsi_key_value_pair *key_value_pair, const int type)
-{
-	if ( type != 0 ) {
-		const uint32_t state_mask = (uint32_t) key_value_pair->state_mask;
-
-		if ( ((conn->session_state_negotiated & state_mask) != 0) && ((key_value_pair->flags & ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_TARGET_DECLARATIVE) == 0) )
-			return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_PARAMETER_XCHG_NOT_ONCE;
-
-		conn->session_state_negotiated |= state_mask;
-	} else {
-		const uint16_t state_mask = (uint16_t) key_value_pair->state_mask;
-
-		if ( ((conn->state_negotiated & state_mask) != 0) && ((key_value_pair->flags & ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_MULTI_NEGOTIATION) == 0) )
-			return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_PARAMETER_XCHG_NOT_ONCE;
-
-		conn->state_negotiated |= state_mask;
-	}
-
-	return ISCSI_CONNECT_PDU_READ_OK;
-}
-
-/**
- * @brief Callback which negotiates a single key and value pairs required for session authentication.
- *
- * This function is called for each key and value
- * pair which needs connection or session
- * authentication.
- *
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key.
- * @param[in] value Value of the key, NULL is allowed.
- * @param[in,out] user_data Pointer to integer value which is
- * 1 is this is discovery, or 0 if not.
- * @return Always returns 0 as this function cannot fail.
- */
-int iscsi_negotiate_key_value_pair_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data)
-{
-	iscsi_key_value_pair_packet *key_value_pair_packet = (iscsi_key_value_pair_packet *) user_data;
-	iscsi_connection *conn = key_value_pair_packet->conn;
-	iscsi_hashmap *key_value_pairs = conn->key_value_pairs;
-	iscsi_key_value_pair *key_value_pair = NULL;
-	int type = 0;
-	int rc = iscsi_hashmap_get( iscsi_globvec->connection_key_value_pairs, key, key_size, (uint8_t **) &key_value_pair);
-
-	if ( rc < 0 ) {
-		key_value_pairs = conn->session->key_value_pairs;
-		type = 1;
-
-		rc = iscsi_hashmap_get( iscsi_globvec->session_key_value_pairs, key, key_size, (uint8_t **) &key_value_pair);
-	}
-
-	if ( (rc == 0) && (key_value_pair->flags & (ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_CHAP_TYPE | ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_SPECIAL_HANDLING)) != 0 )
-		return 0;
-
-	int update_key_value_pair = 1;
-	uint8_t *conn_sess_val;
-
-	if ( rc < 0 ) {
-		conn_sess_val = (uint8_t *) "NotUnderstood";
-
-		update_key_value_pair = 0;
-	} else if ( (key_value_pair_packet->discovery != 0) && ((key_value_pair->flags & ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_DISCOVERY_IGNORE) != 0) ) {
-		conn_sess_val = (uint8_t *) "Irrelevant";
-
-		update_key_value_pair = 0;
-	} else {
-		rc = iscsi_negotiate_key_value_pairs_state( conn, key_value_pair, type );
-
-		if ( rc < 0 )
-			return rc;
-
-		rc = iscsi_hashmap_get( key_value_pairs, key, key_size, &conn_sess_val );
-	}
-
-	if ( (key_value_pair != NULL) && (key_value_pair->type > ISCSI_TEXT_KEY_VALUE_PAIR_TYPE_UNSPECIFIED) ) {
-		if ( (key_value_pair->flags & ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_USE_PREVIOUS_VALUE) != 0 ) {
-			uint8_t *max_burst_len_val;
-			uint32_t first_burst_len = (uint32_t) atol( (char *) value );
-			uint32_t max_burst_len;
-
-			rc = iscsi_get_key_value_pair( key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_BURST_LEN, &max_burst_len_val );
-
-			max_burst_len = ((rc < 0) ? iscsi_globvec->max_burst_len : (uint32_t) atol( (char *) max_burst_len_val ));
-
-			if ( (first_burst_len < ISCSI_MAX_DS_SIZE) && (first_burst_len > max_burst_len) )
-				sprintf( (char *) value, "%" PRId32, first_burst_len );
-		}
-
-		if ( (key_value_pair->flags & ISCSI_TEXT_KEY_VALUE_PAIR_FLAGS_TARGET_DECLARATIVE) != 0 )
-			update_key_value_pair = 0;
-
-		conn_sess_val = iscsi_negotiate_key_value_pair_all( key_value_pair, value, conn_sess_val, &update_key_value_pair );
-	}
-
-	if ( conn_sess_val != NULL ) {
-		if ( update_key_value_pair != 0 )
-			iscsi_update_key_value_pair( key_value_pairs, key, conn_sess_val );
-
-		key_value_pair_packet->pos = iscsi_append_key_value_pair_packet( key_value_pair, key, conn_sess_val, key_value_pair_packet->buf, key_value_pair_packet->pos, key_value_pair_packet->len );
-
-		if ( (int32_t) key_value_pair_packet->pos < 0L )
-			return key_value_pair_packet->pos;
-
-		key_value_pair_packet->pos = iscsi_append_special_key_value_pair_packet( conn, key_value_pair, key, key_value_pair_packet->buf, key_value_pair_packet->pos, key_value_pair_packet->len );
+	if ( pos >= buflen )
+		return -1;
 
-		if ( (int32_t) key_value_pair_packet->pos < 0L )
-			return key_value_pair_packet->pos;
+	const ssize_t maxlen = buflen - pos;
+	if ( number ) {
+		return (int)snprintf( (buf + pos), maxlen, "%s=%d", key, (const int)(const size_t)value ) + 1;
 	}
-
-	return 0;
+	return (int)snprintf( (buf + pos), maxlen, "%s=%s", key, value ) + 1;
 }
 
-/**
- * @brief Negotiates all key and value pairs required for session authentication.
- *
- * @param[in] conn Pointer to iSCSI connection to be
- * negotiated, may NOT be NULL, so be careful.
- * @param[in] key_value_pairs Pointer to key and value pair hash map
- * which contains the negotiation pairs. NULL
- * is prohibited, so take caution.
- * @param[in] buf Pointer to output buffer which may NOT
- * be NULL, so be careful.
- * @param[in] pos Number of bytes already written.
- * @param[in] len Length of DataSegment in bytes.
- * @return New buffer length in bytes if all keys
- * could be negotiated, a negative error
- * code otherwise.
- */
-int32_t iscsi_negotiate_key_value_pairs(iscsi_connection *conn, iscsi_hashmap *key_value_pairs, uint8_t *buf, const uint32_t pos, const uint32_t len)
-{
-	if ( pos > len ) {
-		buf[len - 1UL] = '\0';
-
-		return len;
-	}
-
-	uint8_t *type;
-	int rc = iscsi_get_key_value_pair( key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_SESSION_TYPE, &type );
-
-	if ( rc < 0 )
-		rc = iscsi_get_key_value_pair( conn->session->key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_SESSION_TYPE, &type );
-
-	const int discovery = (((rc == 0) && (strcasecmp( (char *) type, "Discovery" ) == 0)) ? 1 : 0);
 
-	iscsi_key_value_pair_packet key_value_pair_packet = {conn, buf, pos, len, discovery};
-	iscsi_hashmap_iterate( key_value_pairs, iscsi_negotiate_key_value_pair_callback, (uint8_t *) &key_value_pair_packet );
-
-	return key_value_pair_packet.pos;
-}
-
-/**
- * @brief Copies retrieved key and value pairs into SCSI connection and session structures.
- *
- * This function converts string representations of
- * integer and boolean key and value pairs.
- *
- * @param[in] conn Pointer to iSCSI connection which holds the
- * copies of the key and value pairs.
- * @retval -1 An error occured during the copy process,
- * e.g. memory is exhausted.
- * @retval 0 All key and value pairs were copied successfully.
- */
-int iscsi_connection_copy_key_value_pairs(iscsi_connection *conn)
-{
-	int32_t int_val;
-
-	int rc = iscsi_get_int_key_value_pair( conn->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_RECV_DS_LEN, &int_val);
-
-	if ( rc != 0 )
-		return rc;
-
-	if ( (int_val <= 0L) || (int_val > (int32_t) ISCSI_DEFAULT_MAX_RECV_DS_LEN) )
-		int_val = ISCSI_DEFAULT_MAX_RECV_DS_LEN;
-
-	conn->max_recv_ds_len = int_val;
-
-	uint8_t *value;
-
-	rc = iscsi_get_key_value_pair( conn->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_HEADER_DIGEST, &value);
-
-	if ( rc != 0 )
-		return rc;
-
-	conn->header_digest = ((strcasecmp( (char *) value, "CRC32C" ) == 0) ? ISCSI_DIGEST_SIZE : 0);
-
-	rc = iscsi_get_key_value_pair( conn->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DATA_DIGEST, &value);
-
-	if ( rc != 0 )
-		return rc;
-
-	conn->data_digest = ((strcasecmp( (char *) value, "CRC32C" ) == 0) ? ISCSI_DIGEST_SIZE : 0);
-
-	rc = iscsi_get_int_key_value_pair( conn->session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_CONNECTIONS, &int_val);
-
-	if ( rc != 0 )
-		return rc;
-
-	conn->session->max_conns = int_val;
-
-	rc = iscsi_get_int_key_value_pair( conn->session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_OUTSTANDING_R2T, &int_val);
-
-	if ( rc != 0 )
-		return rc;
-
-	conn->session->max_outstanding_r2t = int_val;
-
-	rc = iscsi_get_int_key_value_pair( conn->session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_FIRST_BURST_LEN, &int_val);
-
-	if ( rc != 0 )
-		return rc;
-
-	conn->session->first_burst_len = int_val;
-
-	rc = iscsi_get_int_key_value_pair( conn->session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_BURST_LEN, &int_val);
-
-	if ( rc != 0 )
-		return rc;
-
-	conn->session->max_burst_len = int_val;
-
-	rc = iscsi_get_bool_key_value_pair( conn->session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_INITIAL_R2T, &int_val);
-
-	if ( rc != 0 )
-		return rc;
-
-	conn->session->flags &= ~(ISCSI_SESSION_FLAGS_INIT_R2T | ISCSI_SESSION_FLAGS_IMMEDIATE_DATA);
-
-	if ( int_val != 0L )
-		conn->session->flags |= ISCSI_SESSION_FLAGS_INIT_R2T;
-
-	rc = iscsi_get_bool_key_value_pair( conn->session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_IMMEDIATE_DATA, &int_val);
-
-	if ( rc != 0 )
-		return rc;
-
-	if ( int_val != 0L )
-		conn->session->flags |= ISCSI_SESSION_FLAGS_IMMEDIATE_DATA;
-
-	return 0;
-}
-
-/**
- * @brief Handles stages of CHAP and other authentication methods.
- *
- * This function handles the various stages of the
- * various authentication methods supported by the
- * iSCSI protocol.\n
- * Currently, only CHAP is implemented.
- *
- * @param[in] conn Pointer to iSCSI connection which may NOT
- * be NULL, so be careful.
- * @param[in] key_value_pairs Pointer to hash map containing the
- * authentication key and value pairs. NULL
- * is NOT allowed here, so take caution.
- * @param[in] auth_method Pointer to string containing the
- * authentication method. NULL is forbidden,
- * so be careful.
- * @param[in] buf Pointer to DataSegment buffer. May NOT be
- * NULL, so take caution.
- * @param[in] pos Remaining number of bytes to read.
- * @param[in] len Total number of bytes of DataSegment buffer.
- * @return 0 if authentication methods were handled successfully,
- * a negative error code otherwise.
- */
-static int32_t iscsi_connection_auth_key_value_pairs(iscsi_connection *conn, iscsi_hashmap *key_value_pairs, const uint8_t *auth_method, uint8_t *buf, const uint pos, const uint len)
-{
-	// TODO: Implement CHAP and other authentication methods.
-
-	return 0;
-}
-
-/**
- * @brief Checks buffer sizes of an iSCSI connection with it's associated session for consistency.
- *
- * This function ensures that, for example, first
- * burst length does not exceed maximum burst
- * length and that the buffers don't exceed their
- * minimum and maximum allowed values.
- *
- * @param[in] conn Pointer to iSCSI connection which holds the
- * values to be checked for consistency. May NOT be NULL,
- * so take caution.
- * @retval -1 At least one value check failed the consistency check.
- * @retval 0 All consistency checks have passed successfully.
- */
-static int iscsi_connection_check_key_value_pairs(iscsi_connection *conn)
-{
-	if ( (conn->session->first_burst_len > conn->session->max_burst_len) || (conn->session->first_burst_len < 512UL) || (conn->session->max_burst_len < 512UL) || (conn->session->max_burst_len > iscsi_globvec->max_burst_len) || (conn->max_recv_ds_len < 512UL) || (conn->max_recv_ds_len > iscsi_globvec->max_burst_len) )
-		return -1;
-
-	return 0;
-}
+#define CLAMP(val, min, max) ((val) < (min) ? (min) : ((val) > (max) ? (max) : (val)))
 
 /**
  * @brief Updates iSCSI connection and session values after being retrieved from the client.
@@ -10238,7 +2592,7 @@ static int iscsi_connection_check_key_value_pairs(iscsi_connection *conn)
  * The TCP receive buffer will be adjusted to the new
  * updated value but is never lower than 4KiB and never
  * higher than 8KiB plus header overhead and a factor of
- * 4 for receiving four packets at once.
+ * 16 for receiving 16 packets at once.
  *
  * @param[in] conn Pointer to ISCSI connection which should
  * be updated.
@@ -10246,38 +2600,11 @@ static int iscsi_connection_check_key_value_pairs(iscsi_connection *conn)
  * @retval 0 All values have been updated successfully and
  * the socket is still alive.
  */
-static int iscsi_connection_update_key_value_pairs(iscsi_connection *conn)
+static void iscsi_connection_update_key_value_pairs(iscsi_connection *conn, iscsi_negotiation_kvp *pairs)
 {
-	int rc = iscsi_connection_copy_key_value_pairs( conn );
-
-	if ( rc < 0 ) {
-		if ( conn->state < ISCSI_CONNECT_STATE_EXITING )
-			conn->state = ISCSI_CONNECT_STATE_EXITING;
-
-		return rc;
-	}
-
-	rc = iscsi_connection_check_key_value_pairs( conn );
-
-	if ( (rc < 0) && (conn->state < ISCSI_CONNECT_STATE_EXITING) )
-		conn->state = ISCSI_CONNECT_STATE_EXITING;
-
-	if ( conn->sock < 0 )
-		return -1;
-
-	uint recv_buf_len = conn->session->first_burst_len;
-
-	if ( recv_buf_len < 4096U )
-		recv_buf_len = 4096U;
-	else if ( recv_buf_len > 8192U )
-		recv_buf_len = 8192U;
-
-	recv_buf_len  += (uint) (sizeof(struct iscsi_bhs_packet) + ISCSI_MAX_AHS_SIZE + conn->header_digest + conn->data_digest); // BHS + maximum AHS size + header and data digest overhead
-	recv_buf_len <<= 2U; // Receive up to four streams at once.
-
-	setsockopt( conn->sock, SOL_SOCKET, SO_RCVBUF, &recv_buf_len, sizeof(recv_buf_len)); // Not being able to set the buffer is NOT fatal, so ignore error.
-
-	return rc;
+	conn->session->opts.MaxBurstLength = CLAMP(pairs->MaxBurstLength, 512, ISCSI_MAX_DS_SIZE);
+	conn->session->opts.FirstBurstLength = CLAMP(pairs->FirstBurstLength, 512, pairs->MaxBurstLength);
+	conn->session->opts.MaxRecvDataSegmentLength = CLAMP(pairs->MaxRecvDataSegmentLength, 512, ISCSI_MAX_DS_SIZE);
 }
 
 /**
@@ -10289,94 +2616,40 @@ static int iscsi_connection_update_key_value_pairs(iscsi_connection *conn)
  * @param[in] conn Pointer to ISCSI connection to send the TCP/IP
  * packet with. May NOT be NULL, so be
  * careful.
- * @param[in] login_response_pdu Pointer to login response PDU to
+ * @param[in] resp_pdu Pointer to login response PDU to
  * be sent via TCP/IP. NULL is NOT
  * allowed here, take caution.
- * @param[in] key_value_pairs Pointer to hash map of key and value pairs
- * to be used for login response storage.
- * @param[in] callback Pointer to post processing callback function
- * after sending the TCP/IP packet.
  * @return 0 if the login response has been sent
  * successfully, a negative error code otherwise.
  */
-static int iscsi_connection_pdu_login_response(iscsi_connection *conn, iscsi_pdu *login_response_pdu, iscsi_hashmap *key_value_pairs, iscsi_connection_xfer_complete_callback callback)
+static int iscsi_connection_pdu_login_response(iscsi_connection *conn, iscsi_pdu *resp_pdu)
 {
-	const uint32_t ds_len = login_response_pdu->ds_len;
-
-	login_response_pdu->ds_len = login_response_pdu->len;
-
-	iscsi_login_response_packet *login_response_pkt = (iscsi_login_response_packet *) iscsi_connection_pdu_append( login_response_pdu, login_response_pdu->ahs_len, 0, ds_len, 0 );
+	iscsi_login_response_packet *login_response_pkt =
+		(iscsi_login_response_packet *) iscsi_connection_pdu_resize( resp_pdu, resp_pdu->ahs_len, resp_pdu->ds_write_pos );
 
 	login_response_pkt->version_max    = ISCSI_VERSION_MAX;
 	login_response_pkt->version_active = ISCSI_VERSION_MAX;
 
-	iscsi_put_be32( (uint8_t *) &login_response_pkt->total_ahs_len, ds_len ); // TotalAHSLength is always 0 and DataSegmentLength is 24-bit, so write in one step.
+	iscsi_put_be32( (uint8_t *) &login_response_pkt->total_ahs_len, resp_pdu->ds_len ); // TotalAHSLength is always 0 and DataSegmentLength is 24-bit, so write in one step.
 	iscsi_put_be32( (uint8_t *) &login_response_pkt->stat_sn, conn->stat_sn++ );
 
-	if ( conn->session != NULL ) {
+	if ( conn->session != NULL ) { // TODO: Needed? MC/S?
 		iscsi_put_be32( (uint8_t *) &login_response_pkt->exp_cmd_sn, conn->session->exp_cmd_sn );
 		iscsi_put_be32( (uint8_t *) &login_response_pkt->max_cmd_sn, conn->session->max_cmd_sn );
 	} else {
-		iscsi_put_be32( (uint8_t *) &login_response_pkt->exp_cmd_sn, login_response_pdu->cmd_sn );
-		iscsi_put_be32( (uint8_t *) &login_response_pkt->max_cmd_sn, login_response_pdu->cmd_sn );
+		iscsi_put_be32( (uint8_t *) &login_response_pkt->exp_cmd_sn, resp_pdu->cmd_sn );
+		iscsi_put_be32( (uint8_t *) &login_response_pkt->max_cmd_sn, resp_pdu->cmd_sn );
 	}
 
 	if ( login_response_pkt->status_class != ISCSI_LOGIN_RESPONSE_STATUS_CLASS_SUCCESS )
 		login_response_pkt->flags &= (int8_t) ~(ISCSI_LOGIN_RESPONSE_FLAGS_TRANSIT | ISCSI_LOGIN_RESPONSE_FLAGS_CURRENT_STAGE_MASK | ISCSI_LOGIN_RESPONSE_FLAGS_NEXT_STAGE_MASK );
 
-	iscsi_connection_pdu_write( conn, login_response_pdu, callback, (uint8_t *) conn );
-
-	if ( key_value_pairs != NULL ) {
-		iscsi_hashmap_iterate( key_value_pairs, iscsi_hashmap_key_destroy_value_callback, NULL );
-		iscsi_hashmap_destroy( key_value_pairs );
-	}
+	iscsi_connection_pdu_write( conn, resp_pdu );
 
 	return ISCSI_CONNECT_PDU_READ_OK;
 }
 
 /**
- * @brief Callback function after login response has been sent.
- *
- * This function is invoked after the login
- * response has been sent to the client via
- * TCP/IP.
- *
- * @param[in] user_data Pointer to iSCSI connection which
- * was used for sending the response.
- */
-static void iscsi_connection_pdu_login_err_complete(uint8_t *user_data)
-{
-	iscsi_connection *conn = (iscsi_connection *) user_data;
-
-	if ( (conn->flags & ISCSI_CONNECT_FLAGS_FULL_FEATURE) != 0 )
-		iscsi_connection_update_key_value_pairs( conn );
-}
-
-/**
- * @brief Callback function after login response has been sent.
- *
- * This function is invoked after the login
- * response has been sent to the client via
- * TCP/IP.
- *
- * @param[in] user_data Pointer to iSCSI connection which
- * was used for sending the response.
- */
-static void iscsi_connection_pdu_login_ok_complete(uint8_t *user_data)
-{
-	iscsi_connection *conn = (iscsi_connection *) user_data;
-
-	if ( conn->state >= ISCSI_CONNECT_STATE_EXITING )
-		return;
-
-	if ( (conn->flags & ISCSI_CONNECT_FLAGS_FULL_FEATURE) != 0 ) {
-		iscsi_connection_update_key_value_pairs( conn );
-
-		iscsi_connection_schedule( conn );
-	}
-}
-
-/**
  * @brief Initializes an iSCSI login response PDU structure.
  *
  * This function initializes the internal login
@@ -10395,18 +2668,13 @@ static int iscsi_connection_pdu_login_response_init(iscsi_pdu *login_response_pd
 	iscsi_login_req_packet *login_req_pkt = (iscsi_login_req_packet *) pdu->bhs_pkt;
 	iscsi_login_response_packet *login_response_pkt = (iscsi_login_response_packet *) login_response_pdu->bhs_pkt;
 
-	login_response_pdu->ds_len = 0UL;
-
 	login_response_pkt->opcode = ISCSI_OPCODE_SERVER_LOGIN_RES;
 	login_response_pkt->flags  = (int8_t) (login_req_pkt->flags & (ISCSI_LOGIN_REQ_FLAGS_TRANSIT | ISCSI_LOGIN_REQ_FLAGS_CONTINUE | ISCSI_LOGIN_REQ_FLAGS_CURRENT_STAGE_MASK));
 
 	if ( (login_response_pkt->flags & ISCSI_LOGIN_RESPONSE_FLAGS_TRANSIT) != 0 )
 		login_response_pkt->flags |= (login_req_pkt->flags & ISCSI_LOGIN_REQ_FLAGS_NEXT_STAGE_MASK);
 
-	login_response_pkt->isid.a        = login_req_pkt->isid.a;
-	login_response_pkt->isid.b        = login_req_pkt->isid.b; // Copying over doesn't change endianess.
-	login_response_pkt->isid.c        = login_req_pkt->isid.c;
-	login_response_pkt->isid.d        = login_req_pkt->isid.d; // Copying over doesn't change endianess.
+	login_response_pkt->isid          = login_req_pkt->isid;
 	login_response_pkt->tsih          = login_req_pkt->tsih; // Copying over doesn't change endianess.'
 	login_response_pkt->init_task_tag = login_req_pkt->init_task_tag; // Copying over doesn't change endianess.
 	login_response_pkt->reserved      = 0UL;
@@ -10445,118 +2713,6 @@ static int iscsi_connection_pdu_login_response_init(iscsi_pdu *login_response_pd
 }
 
 /**
- * @brief Saves incoming key / value pairs from the client of a login request PDU.
- *
- * The login response structure has status detail
- * invalid login request type set in case of an error.
- *
- * @param[in] conn Pointer to iSCSI connection
- * used for key and value pair extraction.
- * @param[out] key_value_pairs Pointer to hash map which
- * stores all the parsed key and value pairs.
- * @param[in] login_response_pdu Pointer to iSCSI login response
- * PDU, may NOT be NULL, so be careful.
- * @param[in] pdu Pointer to iSCSI login request packet
- * PDU, may NOT be NULL, so be careful.
- * @retval -1 An error occured during parse of
- * key and value pairs (memory exhaustion).
- * @retval 0 All key and value pairs have been parsed successfully.
- */
-int iscsi_connection_save_incoming_key_value_pairs(iscsi_connection *conn, iscsi_hashmap *key_value_pairs, iscsi_pdu *login_response_pdu, const iscsi_pdu *pdu)
-{
-	iscsi_login_req_packet *login_req_pkt           = (iscsi_login_req_packet *) pdu->bhs_pkt;
-	iscsi_login_response_packet *login_response_pkt = (iscsi_login_response_packet *) login_response_pdu->bhs_pkt;
-	const int rc = iscsi_parse_key_value_pairs( key_value_pairs, (uint8_t *) pdu->ds_cmd_data, pdu->ds_len, ((login_req_pkt->flags & ISCSI_LOGIN_REQ_FLAGS_CONTINUE) != 0), &conn->partial_pairs );
-
-	if ( rc < 0 ) {
-		login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
-		login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_MISC;
-
-		return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_PARAMETER;
-	}
-
-	return ISCSI_CONNECT_PDU_READ_OK;
-}
-
-/**
- * @brief Extracts the Initiator Session ID (ISID) from packet data into a 64-bit unsigned integer.
- *
- * The ISID is constructed by OR'ing and shifting the
- * four parts a, b, c and d into their proper places
- * with d being in the LSB area.\n
- * Since the ISID is only 48 bit wide, the 16
- * MSB bits are always cleared.
- *
- * @param[in] isid Pointer to the ISID part of packet data.
- * May NOT be NULL, so be careful.
- * @return The 64-bit unsigned integer value representing
- * the Initiator Session ID (ISID).
- */
-static inline uint64_t iscsi_connection_get_isid(const iscsi_isid *isid)
-{
-	return ((uint64_t) isid->a << 40ULL) | ((uint64_t) iscsi_get_be16(isid->b) << 24ULL) | ((uint64_t) isid->c << 16ULL) | (uint64_t) iscsi_get_be16(isid->d);
-}
-
-/**
- * @brief Initializes the login response port names.
- *
- * This function extracts the initiator name from the
- * key and value pair and stores the result in
- * the iSCSI connection, as well as a full qualified
- * initiator port name.
- *
- * @param[in] conn Pointer to iSCSI connection where to
- * store the initiator name.
- * @param[in] response_pdu Pointer to response PDU to initialize the
- * port from, NULL is NOT allowed here, so be careful.
- * @param[in] key_value_pairs Pointer to the hash map containing the key
- * and value pair for the initiator name. May NOT be
- * NULL, so take caution.
- * @param[out] init_port_name Pointer to store the full qualified name
- * of the initiator port and may NOT be NULL, so be careful.
- * @return 0 in case the port could be initialized
- * successfully, a negative error code otherwise
- * in which case the status class and detail are
- * set as well.
- */
-static int iscsi_connection_login_init_port(iscsi_connection *conn, iscsi_pdu *response_pdu, iscsi_hashmap *key_value_pairs, uint8_t **init_port_name)
-{
-	iscsi_login_response_packet *login_response_pkt = (iscsi_login_response_packet *) response_pdu->bhs_pkt;
-	uint8_t *init_name;
-	int rc = iscsi_get_key_value_pair( key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_INITIATOR_NAME, &init_name );
-
-	if ( rc != 0 ) {
-		login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
-		login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_MISSING_PARAMETER;
-
-		return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
-	}
-
-	conn->init_name = iscsi_sprintf_alloc( "%s", init_name );
-
-	if ( conn->init_name == NULL ) {
-		login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_SERVER_ERR;
-		login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_SERVER_ERR_OUT_OF_RESOURCES;
-
-		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-	}
-
-	*init_port_name = iscsi_sprintf_alloc( "%s,i,0x%12.12" PRIx64, init_name, iscsi_connection_get_isid( &login_response_pkt->isid ) );
-
-	if ( *init_port_name == NULL ) {
-		login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_SERVER_ERR;
-		login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_SERVER_ERR_OUT_OF_RESOURCES;
-
-		free( conn->init_name );
-		conn->init_name = NULL;
-
-		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-	}
-
-	return ISCSI_CONNECT_PDU_READ_OK;
-}
-
-/**
  * @brief Determines the session type of login.
  *
  * This function is used to retrieve the
@@ -10566,47 +2722,28 @@ static int iscsi_connection_login_init_port(iscsi_connection *conn, iscsi_pdu *r
  *
  * @param[in] login_response_pdu Pointer to login response PDU,
  * NULL is not allowed, so take caution.
- * @param[in] key_value_pairs Pointer to key and value pairs which
+ * @param[in] type_str Pointer to key and value pairs which
  * contain the session type parameter to be evaluated,
  * which may NOT be NULL, so take caution.
- * @param[out] type Pointer to integer which stores the
- * determined session type and is NOT allowed to be
- * NULL, so be careful.
  * @return 0 on successful operation, a negative error code
  * otherwise. The output session 'type' is unchanged, if
  * an invalid session type value was retrieved.
  */
-static int iscsi_connection_login_session_type(iscsi_pdu *login_response_pdu, iscsi_hashmap *key_value_pairs, int *type )
+static int iscsi_login_parse_session_type(iscsi_pdu *login_response_pdu, const char *type_str, int *type)
 {
 	iscsi_login_response_packet *login_response_pkt = (iscsi_login_response_packet *) login_response_pdu->bhs_pkt;
-	uint8_t *type_str;
-	int rc = iscsi_get_key_value_pair( key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_SESSION_TYPE, &type_str );
-
-	if ( (rc == 0) && (type_str != NULL) ) {
-		if ( strcasecmp( (char *) type_str, "Discovery" ) == 0 ) {
-			*type = ISCSI_SESSION_TYPE_DISCOVERY;
-		} else if ( strcasecmp( (char *) type_str, "Normal" ) == 0 ) {
-			*type = ISCSI_SESSION_TYPE_NORMAL;
-		} else {
-			*type = ISCSI_SESSION_TYPE_INVALID;
-
-			login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
-			login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_MISSING_PARAMETER;
-
-			return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
-		}
-	} else {
-		if ( login_response_pkt->tsih != 0U ) {
-			*type = ISCSI_SESSION_TYPE_NORMAL;
-		} else {
-			login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
-			login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_MISSING_PARAMETER;
 
-			return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
-		}
+	if ( type_str != NULL && strcasecmp( type_str, "Normal" ) == 0 ) {
+		*type = ISCSI_SESSION_TYPE_NORMAL;
+		return ISCSI_CONNECT_PDU_READ_OK;
 	}
 
-	return ISCSI_CONNECT_PDU_READ_OK;
+	*type = ISCSI_SESSION_TYPE_INVALID;
+	logadd( LOG_DEBUG1, "Unsupported session type: %s", type_str );
+	login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
+	login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_MISSING_PARAMETER;
+
+	return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
 }
 
 /**
@@ -10626,169 +2763,76 @@ static int iscsi_connection_login_session_type(iscsi_pdu *login_response_pdu, is
  * here, so take caution.
  * @param[in] target_name Pointer to target node name and may
  * NOT be NULL, be careful.
- * @param[out] Pointer where to store the target node belonging
- * to the target name. May NOT be NULL, so take caution.
  * @return 0 if the check was successful or a negative
  * error code otherwise.
  */
-static int iscsi_connection_login_check_target(iscsi_connection *conn, iscsi_pdu *login_response_pdu, uint8_t *target_name, iscsi_target_node **target)
+static int iscsi_image_from_target(iscsi_connection *conn, iscsi_pdu *login_response_pdu, const char *target_name)
 {
 	iscsi_login_response_packet *login_response_pkt = (iscsi_login_response_packet *) login_response_pdu->bhs_pkt;
 
-	*target = iscsi_target_node_find( target_name );
+	char *image_rev        = NULL;
+	char *tmpbuf           = strdup( target_name );
+	char *image_name       = tmpbuf;
+	char *tmp              = strchr( tmpbuf, ':' );
 
-	if ( *target == NULL ) {
-		login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
-		login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_NOT_FOUND;
+	if ( tmpbuf == NULL ) {
+		logadd( LOG_ERROR, "iscsi_target_node_image_get: Out of memory while allocating DNBD3 image name for iSCSI target node" );
+		login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_SERVER_ERR;
+		login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_SERVER_ERR_OUT_OF_RESOURCES;
 
 		return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
 	}
 
-	if ( ((*target)->flags & ISCSI_TARGET_NODE_FLAGS_DESTROYED) != 0 ) {
-		login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
-		login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_TARGET_REMOVED;
-
-		return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
+	while ( tmp != NULL ) {
+		*tmp++ = '\0';
+		if ( image_rev != NULL ) {
+			image_name = image_rev;
+		}
+		image_rev  = tmp;
+		tmp        = strchr( tmp, ':' );
 	}
 
-	uint8_t *redirect_adr = iscsi_target_node_get_redirect( conn, *target );
-
-	if ( redirect_adr != NULL ) {
-		iscsi_key_value_pair *key_value_pair;
-		const int rc = iscsi_hashmap_get( iscsi_globvec->session_key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_ADDRESS, strlen( (char *) ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_ADDRESS ) + 1, (uint8_t **) &key_value_pair);
-
-		if ( rc < 0 ) {
-			login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_SERVER_ERR;
-			login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_SERVER_ERR_OUT_OF_RESOURCES;
-
-			return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
+	uint16_t rev   = 0;
+	if ( image_rev != NULL ) {
+		char *end = NULL;
+		long rid = strtol( image_rev, &end, 10 );
+		if ( end == NULL || *end != '\0' || rid < 0 || rid > 0xFFFF ) {
+			logadd( LOG_DEBUG1, "iscsi_image_from_target: Invalid revision number (%s) in iSCSI target node name: '%s'", image_rev, target_name );
+		} else {
+			rev = (uint16_t)rid;
 		}
+	}
+	dnbd3_image_t *image = image_getOrLoad( image_name, rev );
 
-		const int32_t ds_len = iscsi_append_key_value_pair_packet( key_value_pair, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_ADDRESS, redirect_adr, (uint8_t *) login_response_pdu->ds_cmd_data, login_response_pdu->ds_len, login_response_pdu->len );
-
-		if ( ds_len < 0L ) {
-			login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_SERVER_ERR;
-			login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_SERVER_ERR_OUT_OF_RESOURCES;
+	if ( image == NULL && image_rev != NULL ) {
+		image = image_getOrLoad( image_rev, rev );
+	}
 
-			return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-		}
+	if ( image == NULL && strncasecmp( image_name, ISCSI_TARGET_NODE_WWN_NAME_PREFIX, ISCSI_STRLEN(ISCSI_TARGET_NODE_WWN_NAME_PREFIX) ) == 0 ) {
+		uint64_t wwn = strtoull( (image_name + ISCSI_STRLEN(ISCSI_TARGET_NODE_WWN_NAME_PREFIX)), NULL, 16 );
 
-		login_response_pdu->ds_len        = ds_len;
-		login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_REDIRECT;
-		login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_REDIRECT_TEMP;
+		image = image_getByWwn( wwn, rev, true );
 
-		return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
+		if ( image == NULL ) {
+			wwn   = strtoull( (tmp + ISCSI_STRLEN(ISCSI_TARGET_NODE_WWN_NAME_PREFIX)), NULL, 16 );
+			image = image_getByWwn( wwn, rev, true );
+		}
 	}
 
-	if ( iscsi_target_node_access( conn, *target, conn->init_name, conn->init_adr ) < 0 ) {
+	free( tmpbuf );
+
+	if ( image == NULL ) {
 		login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
-		login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_AUTH_FAIL;
+		login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_NOT_FOUND;
 
 		return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
 	}
+	conn->client->image = image;
 
 	return ISCSI_CONNECT_PDU_READ_OK;
 }
 
 /**
- * @brief Retrieves iSCSI session by Target Session Identifying Handle (TSIH).
- *
- * This function checks if the TSIH is valid and if so,
- * retrieves the pointer to its iSCSI session structure.
- *
- * @param[in] tsih Target Session Identifying Handle (TSIH).
- * @return Pointer to related iSCSI session or NULL in case
- * the TSIH is invalid or not found.
- */
-static iscsi_session *iscsi_session_get_by_tsih(const uint16_t tsih)
-{
-	if ( tsih == 0U )
-		return NULL;
-
-	const uint64_t hash_key = tsih;
-	iscsi_session *session;
-
-	pthread_rwlock_rdlock( &iscsi_globvec->sessions_rwlock );
-
-	int rc = iscsi_hashmap_get( iscsi_globvec->sessions, (uint8_t *) &hash_key, sizeof(hash_key), (uint8_t **) &session );
-
-	pthread_rwlock_unlock( &iscsi_globvec->sessions_rwlock );
-
-	return ((rc == 0) ? session : NULL);
-}
-
-/**
- * @brief Appends an iSCSI connection to a session.
- *
- * This function checks if the maximum number of
- * connections per session is not exceeded and if
- * there is session spanning.
- * @param[in] conn Pointer to iSCSI connection, may NOT
- * be NULL, so be careful.
- * @param[in] init_port_name Pointer to initiator port name,
- * may NOT be NULL, so take caution.
- * @param[in] tsih Target Session Identifying Handle (TSIH).
- * @return Upper 8 bits of contain status class, lower 8
- * bits status detail. All 16 bits set to zero
- * indicate success.
- */
-static uint16_t iscsi_session_append(iscsi_connection *conn, const uint8_t *init_port_name, const uint16_t tsih)
-{
-	iscsi_session *session = iscsi_session_get_by_tsih( tsih );
-
-	if ( (session == NULL) || (conn->pg_tag != session->tag) || (strcasecmp( (char *) init_port_name, (char *) iscsi_port_get_name( session->init_port ) ) != 0) || (conn->target != session->target) )
-		return (ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR << 8U) | ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_NO_SESSION_SPANNING;
-
-	if ( session->conns >= session->max_conns )
-		return (ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR << 8U) | ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_TOO_MANY_CONNECTIONS;
-
-	conn->session = session;
-
-	iscsi_list_enqueue( &session->conn_list, &conn->node );
-
-	session->conns++;
-
-	return (ISCSI_LOGIN_RESPONSE_STATUS_CLASS_SUCCESS << 8U) | ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_SUCCESS;
-}
-
-/**
- * @brief Checks whether the session is valid.
- *
- * This function also appends the connection
- * to a session if it's valid.'
- *
- * @param[in] conn Pointer to iSCSI connection,
- * may NOT be NULL, so take caution.
- * @param[in] login_response_pdu Pointer to login response PDU,
- * NULL is not allowed, hence be careful.
- * @param[in] init_port_name Pointer to initiator port name.
- * Non-NULL only, so be careful.
- * @param[in] cid Connection ID (CID).
- * @return 0 if valid session, a negative error code
- * otherwise.
- */
-static int iscsi_connection_login_check_session(iscsi_connection *conn, iscsi_pdu *login_response_pdu, uint8_t *init_port_name, uint cid)
-{
-	iscsi_login_response_packet *login_response_pkt = (iscsi_login_response_packet *) login_response_pdu->bhs_pkt;
-	int rc = 0;
-
-	if ( login_response_pkt->tsih != 0U ) {
-		rc = iscsi_session_append( conn, init_port_name, iscsi_get_be16(login_response_pkt->tsih) );
-
-		if ( rc != 0 ) {
-			login_response_pkt->status_class  = (uint8_t) (rc >> 8U);
-			login_response_pkt->status_detail = (uint8_t) rc;
-
-			return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
-		}
-	} else if ( (iscsi_globvec->flags & ISCSI_GLOBALS_FLAGS_ISID_ALLOW_DUPLICATES) != 0 ) {
-		iscsi_connection_drop( conn, init_port_name, 0 );
-	}
-
-	return rc;
-}
-
-/**
  * @brief Initializes a rejecting login response packet.
  *
  * The login response structure has status detail
@@ -10799,7 +2843,7 @@ static int iscsi_connection_login_check_session(iscsi_connection *conn, iscsi_pd
  * @param[in] pdu Pointer to iSCSI login request PDU, may NOT
  * be NULL, so be careful.
  */
-void iscsi_connection_login_response_reject(iscsi_pdu *login_response_pdu, const iscsi_pdu *pdu)
+static void iscsi_connection_login_response_reject(iscsi_pdu *login_response_pdu, const iscsi_pdu *pdu)
 {
 	iscsi_login_response_packet *login_response_pkt = (iscsi_login_response_packet *) login_response_pdu->bhs_pkt;
 
@@ -10808,10 +2852,6 @@ void iscsi_connection_login_response_reject(iscsi_pdu *login_response_pdu, const
 	login_response_pkt->version_max                  = ISCSI_VERSION_MAX;
 	login_response_pkt->version_active               = ISCSI_VERSION_MAX;
 	*(uint32_t *) &login_response_pkt->total_ahs_len = 0UL; // TotalAHSLength and DataSegmentLength are always 0, so write in one step.
-	login_response_pkt->isid.a                       = 0U;
-	login_response_pkt->isid.b                       = 0U;
-	login_response_pkt->isid.c                       = 0U;
-	login_response_pkt->isid.d                       = 0U;
 	login_response_pkt->tsih                         = 0U;
 	login_response_pkt->init_task_tag                = ((iscsi_login_req_packet *) pdu->bhs_pkt)->init_task_tag;
 	login_response_pkt->reserved                     = 0UL;
@@ -10834,70 +2874,51 @@ void iscsi_connection_login_response_reject(iscsi_pdu *login_response_pdu, const
  * @param[in] conn Pointer to connection to link the PDU with.
  * If this is NULL the connection has to be
  * linked later.
- * @param[in] ahs_len Length of AHS packet data to be appended.
- * @param[in] header_digest_size Length of header digest. Currently,
- * only 0, in which case the header digest will
- * be removed, or 4 for CRC32C are allowed.
  * @param[in] ds_len Length of DataSegment packet data to be appended.
  * May not exceed 16MiB - 1 (16777215 bytes).
- * @param[in] data_digest_size Length of optional data digest (0 or
- * 4 for now) to add.
  * @return Pointer to allocated and zero filled PDU or NULL
  * in case of an error (usually memory exhaustion).
  */
-iscsi_pdu *iscsi_connection_pdu_create(iscsi_connection *conn, const uint ahs_len, const int header_digest_size, const uint32_t ds_len, const int data_digest_size)
+static iscsi_pdu *iscsi_connection_pdu_create(iscsi_connection *conn, const uint32_t ds_len)
 {
-	if ( (ahs_len > ISCSI_MAX_AHS_SIZE) || ((header_digest_size != 0) && (header_digest_size != ISCSI_DIGEST_SIZE)) || ((data_digest_size != 0) && data_digest_size != ISCSI_DIGEST_SIZE) || (ds_len > ISCSI_MAX_DS_SIZE) )
+	if ( ds_len > ISCSI_MAX_DS_SIZE ) {
+		logadd( LOG_ERROR, "iscsi_pdu_create: Invalid  DS length" );
 		return NULL;
+	}
 
-	iscsi_pdu *pdu = (iscsi_pdu *) malloc( sizeof(struct iscsi_pdu) );
+	const uint32_t pkt_ds_len = ISCSI_ALIGN( ds_len, ISCSI_ALIGN_SIZE );
+	const uint32_t len        = (uint32_t) ( sizeof(struct iscsi_bhs_packet) + pkt_ds_len );
 
+	iscsi_pdu *pdu = malloc( sizeof(struct iscsi_pdu) );
 	if ( pdu == NULL ) {
 		logadd( LOG_ERROR, "iscsi_pdu_create: Out of memory while allocating iSCSI PDU" );
 
 		return NULL;
 	}
 
-	const uint32_t pkt_ds_len = ISCSI_ALIGN(ds_len, ISCSI_ALIGN_SIZE);
-	const uint32_t len        = (uint32_t) (sizeof(struct iscsi_bhs_packet) + (uint32_t) ahs_len + header_digest_size + pkt_ds_len + ((pkt_ds_len != 0UL) ? (uint32_t) data_digest_size : 0UL));
 	iscsi_bhs_packet *bhs_pkt = malloc( len );
-
 	if ( bhs_pkt == NULL ) {
-		logadd( LOG_ERROR, "iscsi_pdu_create: Out of memory while allocating iSCSI PDU packet data" );
-
 		free( pdu );
+		logadd( LOG_ERROR, "iscsi_pdu_create: Out of memory while allocating iSCSI BHS packet" );
 
 		return NULL;
 	}
 
-	pdu->node.succ               = NULL;
-	pdu->node.pred               = NULL;
 	pdu->bhs_pkt                 = bhs_pkt;
-	pdu->ahs_pkt                 = ((ahs_len != 0U) ? (iscsi_ahs_packet *) (((uint8_t *) bhs_pkt) + sizeof(struct iscsi_bhs_packet) ) : NULL);
-	pdu->header_digest           = ((header_digest_size != 0) ? (iscsi_header_digest *) (((uint8_t *) bhs_pkt) + sizeof(struct iscsi_bhs_packet) + ahs_len) : NULL);
-	pdu->ds_cmd_data             = ((pkt_ds_len != 0UL) ? (iscsi_scsi_ds_cmd_data *) (((uint8_t *) bhs_pkt) + sizeof(struct iscsi_bhs_packet) + ahs_len + header_digest_size) : NULL);
-	pdu->data_digest             = (((pkt_ds_len != 0uL) && (data_digest_size != 0)) ? (iscsi_data_digest *) (((uint8_t *) bhs_pkt) + sizeof(struct iscsi_bhs_packet) + ahs_len + header_digest_size + ISCSI_ALIGN(pkt_ds_len, ISCSI_ALIGN_SIZE)) : NULL);
+	pdu->ahs_pkt                 = NULL;
+	pdu->ds_cmd_data             = (pkt_ds_len != 0UL) ? (iscsi_scsi_ds_cmd_data *) (((uint8_t *) bhs_pkt) + sizeof(struct iscsi_bhs_packet)) : NULL;
 	pdu->task                    = NULL;
-	pdu->conn                    = conn;
-	pdu->xfer_complete_callback  = NULL;
-	pdu->xfer_complete_user_data = NULL;
 	pdu->flags                   = 0;
-	pdu->ref                     = 1UL;
 	pdu->bhs_pos                 = 0U;
-	pdu->ahs_pos                 = 0U;
-	pdu->ahs_len                 = ahs_len;
-	pdu->header_digest_pos       = 0U;
-	pdu->header_digest_size      = header_digest_size;
-	pdu->ds_len                  = pkt_ds_len;
-	pdu->pos                     = 0UL;
-	pdu->len                     = pkt_ds_len;
-	pdu->data_digest_pos         = 0U;
-	pdu->data_digest_size        = data_digest_size;
-	pdu->task_ref_cnt            = 0U;
+	pdu->ahs_len                 = 0;
+	pdu->ds_len                  = ds_len;
+	pdu->ds_write_pos            = 0;
 	pdu->cmd_sn                  = 0UL;
+	pdu->recv_pos                = 0;
 
-	if ( pkt_ds_len != 0UL )
+	if ( pkt_ds_len != 0UL ) {
 		memset( (((uint8_t *) pdu->ds_cmd_data) + ds_len), 0, (pkt_ds_len - ds_len) );
+	}
 
 	return pdu;
 }
@@ -10912,21 +2933,12 @@ iscsi_pdu *iscsi_connection_pdu_create(iscsi_connection *conn, const uint ahs_le
  * may be NULL in which case this function
  * does nothing.
  */
-void iscsi_connection_pdu_destroy(iscsi_pdu *pdu)
+static void iscsi_connection_pdu_destroy(iscsi_pdu *pdu)
 {
-	if ( (pdu != NULL) && (--pdu->ref == 0UL) ) {
-		if ( pdu->bhs_pkt != NULL ) {
-			free( pdu->bhs_pkt );
-
-			pdu->bhs_pkt       = NULL;
-			pdu->ahs_pkt       = NULL;
-			pdu->header_digest = NULL;
-			pdu->ds_cmd_data   = NULL;
-			pdu->data_digest   = NULL;
-		}
-
-		free( pdu );
-	}
+	if ( pdu == NULL )
+		return;
+	free( pdu->bhs_pkt );
+	free( pdu );
 }
 
 /**
@@ -10940,32 +2952,29 @@ void iscsi_connection_pdu_destroy(iscsi_pdu *pdu)
  * the packet data to. May NOT be NULL, so
  * be careful.
  * @param[in] ahs_len Length of AHS packet data to be appended.
- * @param[in] header_digest_size Length of header digest. Currently,
- * only 0, in which case the header digest will
- * be removed, or 4 for CRC32C are allowed.
  * @param[in] ds_len Length of DataSegment packet data to be appended.
  * May not exceed 16MiB - 1 (16777215 bytes).
- * @param[in] data_digest_size Length of optional data digest (0 or
- * 4 for now) to add.
  * @return Pointer to allocated and zero filled PDU or NULL
  * in case of an error (usually memory exhaustion).
  */
-iscsi_bhs_packet *iscsi_connection_pdu_append(iscsi_pdu *pdu, const uint ahs_len, const int header_digest_size, const uint32_t ds_len, const int data_digest_size)
+static iscsi_bhs_packet *iscsi_connection_pdu_resize(iscsi_pdu *pdu, const uint ahs_len,  const uint32_t ds_len)
 {
-	if ( (ahs_len > ISCSI_MAX_AHS_SIZE) || ((header_digest_size != 0) && (header_digest_size != ISCSI_DIGEST_SIZE)) || ((data_digest_size != 0) && data_digest_size != ISCSI_DIGEST_SIZE) || (ds_len > ISCSI_MAX_DS_SIZE) )
+	if ( (ahs_len > ISCSI_MAX_AHS_SIZE) || (ds_len > ISCSI_MAX_DS_SIZE) || (ahs_len % 4 != 0) ) {
+		logadd( LOG_ERROR, "iscsi_connection_pdu_resize: Invalid AHS or DataSegment packet size" );
 		return NULL;
+	}
 
-	if ( (ahs_len != pdu->ahs_len) || (header_digest_size != pdu->header_digest_size) || (ds_len != pdu->ds_len) || (data_digest_size != pdu->data_digest_size) ) {
+	if ( (ahs_len != pdu->ahs_len) || (ds_len != pdu->ds_len) ) {
 		iscsi_bhs_packet *bhs_pkt;
 		const uint32_t pkt_ds_len = ISCSI_ALIGN(ds_len, ISCSI_ALIGN_SIZE);
-		const uint32_t old_len    = (uint32_t) (sizeof(struct iscsi_bhs_packet) + (uint32_t) pdu->ahs_len + pdu->header_digest_size + pdu->ds_len + ((pdu->ds_len != 0UL) ? (uint32_t) pdu->data_digest_size : 0UL));
-		const uint32_t new_len    = (uint32_t) (sizeof(struct iscsi_bhs_packet) + (uint32_t) ahs_len + header_digest_size + pkt_ds_len + ((pkt_ds_len != 0UL) ? (uint32_t) data_digest_size : 0UL));
+		const uint32_t old_len    = (uint32_t) (sizeof(struct iscsi_bhs_packet) + (uint32_t) pdu->ahs_len + ISCSI_ALIGN(pdu->ds_len, ISCSI_ALIGN_SIZE));
+		const uint32_t new_len    = (uint32_t) (sizeof(struct iscsi_bhs_packet) + (uint32_t) ahs_len + pkt_ds_len);
 
 		if ( new_len > old_len ) {
 			bhs_pkt = realloc( pdu->bhs_pkt, new_len );
 
 			if ( bhs_pkt == NULL ) {
-				logadd( LOG_ERROR, "iscsi_connection_pdu_append: Out of memory while reallocating iSCSI PDU packet data" );
+				logadd( LOG_ERROR, "iscsi_connection_pdu_resize: Out of memory while reallocating iSCSI PDU packet data" );
 
 				return NULL;
 			}
@@ -10975,332 +2984,20 @@ iscsi_bhs_packet *iscsi_connection_pdu_append(iscsi_pdu *pdu, const uint ahs_len
 			bhs_pkt = pdu->bhs_pkt;
 		}
 
-		pdu->ahs_pkt            = ((ahs_len != 0U) ? (iscsi_ahs_packet *) (((uint8_t *) bhs_pkt) + sizeof(struct iscsi_bhs_packet) ) : NULL);
-		pdu->header_digest      = ((header_digest_size != 0) ? (iscsi_header_digest *) (((uint8_t *) bhs_pkt) + sizeof(struct iscsi_bhs_packet) + ahs_len) : NULL);
-		pdu->ds_cmd_data        = ((pkt_ds_len != 0UL) ? (iscsi_scsi_ds_cmd_data *) (((uint8_t *) bhs_pkt) + sizeof(struct iscsi_bhs_packet) + ahs_len + header_digest_size) : NULL);
-		pdu->data_digest        = (((pkt_ds_len != 0UL) && (data_digest_size != 0)) ? (iscsi_data_digest *) (((uint8_t *) bhs_pkt) + sizeof(struct iscsi_bhs_packet) + ahs_len + header_digest_size + pkt_ds_len) : NULL);
+		pdu->ahs_pkt            = (ahs_len != 0U) ? (iscsi_ahs_packet *) (((uint8_t *) bhs_pkt) + sizeof(struct iscsi_bhs_packet)) : NULL;
+		pdu->ds_cmd_data        = (pkt_ds_len != 0UL) ? (iscsi_scsi_ds_cmd_data *) (((uint8_t *) bhs_pkt) + sizeof(struct iscsi_bhs_packet) + ahs_len) : NULL;
 		pdu->ahs_len            = ahs_len;
-		pdu->header_digest_size = header_digest_size;
-		pdu->ds_len             = pkt_ds_len;
-		pdu->len                = pkt_ds_len;
-		pdu->data_digest_size   = data_digest_size;
+		pdu->ds_len             = ds_len;
 
-		if ( pkt_ds_len != 0UL )
+		if ( pkt_ds_len != 0UL ) {
 			memset( (((uint8_t *) pdu->ds_cmd_data) + ds_len), 0, (pkt_ds_len - ds_len) );
+		}
 	}
 
 	return pdu->bhs_pkt;
 }
 
 /**
- * @brief Frees an iSCSI PDU structure used by using connection callback function.
- *
- * This function frees an iSCSI PDU structure.
- *
- * @param[in] conn Pointer to iSCSI connection to free
- * the PDU from. May NOT be NULL, so take caution.
- * @param[in] pdu Pointer to iSCSI PDU structure to be
- * freed. NULL is NOT allowed here, so take
- * caution.
- */
-void iscsi_connection_pdu_free(iscsi_connection *conn, iscsi_pdu *pdu)
-{
-	iscsi_connection_xfer_complete_callback callback = pdu->xfer_complete_callback;
-	uint8_t *user_data                               = pdu->xfer_complete_user_data;
-
-	pdu->xfer_complete_callback = NULL;
-
-	if ( pdu->task != NULL )
-		iscsi_task_destroy( pdu->task );
-
-	iscsi_connection_pdu_destroy( pdu );
-
-	if ( callback != NULL )
-		callback( user_data );
-}
-
-/**
- * @brief Retrieves the pointer to an specific AHS packet from an iSCSI PDU by index.
- *
- * Gets the pointer of an AHS packet by specified index.
- *
- * @param[in] pdu Pointer to iSCSI PDU of which the
- * AHS packet should be retrieved. May
- * NOT be NULL, so be careful.
- * @param[in] index Zero-based index number of AHS packet to
- * be received.
- * @return The pointer to the AHS packet at specified index on
- * success or NULL in case of an error or if the specific index
- * is out of range.
- */
-iscsi_ahs_packet *iscsi_connection_pdu_ahs_packet_get(const iscsi_pdu *pdu, const int index)
-{
-	iscsi_ahs_packet *ahs_pkt = pdu->ahs_pkt; // First AHS packet
-
-	if ( ahs_pkt == NULL )
-		return NULL;
-
-	int count    = index;
-	uint ahs_len = pdu->ahs_len;
-
-	while ( (int) ahs_len > 0 ) {
-		if ( count-- < 0 )
-			return ahs_pkt;
-
-		uint len = iscsi_get_be16(ahs_pkt->len) + offsetof(struct iscsi_ahs_packet, data); // Total length of current AHS packet
-
-		len      = ISCSI_ALIGN(len, ISCSI_ALIGN_SIZE);
-		ahs_len -= len;
-		ahs_pkt  = (iscsi_ahs_packet *) (((uint8_t *) ahs_pkt) + (len - offsetof(struct iscsi_ahs_packet, data))); // Advance pointer to next AHS packet
-	}
-
-	logadd( LOG_ERROR, "iscsi_connection_pdu_ahs_packet_get: Specified index for AHS packet does not exist" );
-
-	return NULL;
-}
-
-/**
- * @brief Counts number of AHS packets of an iSCSI PDU.
- *
- * Gets the total number of AHS packets.
- *
- * @param[in] pdu Pointer to iscsi PDU of which the
- * number of AHS packets should be counted.
- * May NOT be NULL, so be careful.
- * @return The number of AHS packets or 0 if no AHS
- * packet data is available.
- */
-int iscsi_connection_pdu_ahs_packet_count(const iscsi_pdu *pdu)
-{
-	const iscsi_ahs_packet *ahs_pkt = pdu->ahs_pkt; // First AHS packet
-
-	if ( ahs_pkt == NULL )
-		return 0;
-
-	int count    = 0;
-	uint ahs_len = pdu->ahs_len;
-
-	while ( (int) ahs_len > 0 ) {
-		uint len = iscsi_get_be16(ahs_pkt->len) + offsetof(struct iscsi_ahs_packet, data); // Total length of current AHS packet
-
-		len      = ISCSI_ALIGN(len, ISCSI_ALIGN_SIZE);
-		ahs_len -= len;
-		ahs_pkt  = (iscsi_ahs_packet *) (((uint8_t *) ahs_pkt) + (len - offsetof(struct iscsi_ahs_packet, data))); // Advance pointer to next AHS packet
-		count++;
-	}
-
-	return count;
-}
-
-/// CRC32C lookup table. Created with a polynomial reflect value of 0x82F63B78.
-static const uint32_t crc32c_lut[] = {
-	0x00000000, 0xF26B8303, 0xE13B70F7, 0x1350F3F4, 0xC79A971F, 0x35F1141C, 0x26A1E7E8, 0xD4CA64EB,
-	0x8AD958CF, 0x78B2DBCC, 0x6BE22838, 0x9989AB3B, 0x4D43CFD0, 0xBF284CD3, 0xAC78BF27, 0x5E133C24,
-	0x105EC76F, 0xE235446C, 0xF165B798, 0x030E349B, 0xD7C45070, 0x25AFD373, 0x36FF2087, 0xC494A384,
-	0x9A879FA0, 0x68EC1CA3, 0x7BBCEF57, 0x89D76C54, 0x5D1D08BF, 0xAF768BBC, 0xBC267848, 0x4E4DFB4B,
-	0x20BD8EDE, 0xD2D60DDD, 0xC186FE29, 0x33ED7D2A, 0xE72719C1, 0x154C9AC2, 0x061C6936, 0xF477EA35,
-	0xAA64D611, 0x580F5512, 0x4B5FA6E6, 0xB93425E5, 0x6DFE410E, 0x9F95C20D, 0x8CC531F9, 0x7EAEB2FA,
-	0x30E349B1, 0xC288CAB2, 0xD1D83946, 0x23B3BA45, 0xF779DEAE, 0x05125DAD, 0x1642AE59, 0xE4292D5A,
-	0xBA3A117E, 0x4851927D, 0x5B016189, 0xA96AE28A, 0x7DA08661, 0x8FCB0562, 0x9C9BF696, 0x6EF07595,
-	0x417B1DBC, 0xB3109EBF, 0xA0406D4B, 0x522BEE48, 0x86E18AA3, 0x748A09A0, 0x67DAFA54, 0x95B17957,
-	0xCBA24573, 0x39C9C670, 0x2A993584, 0xD8F2B687, 0x0C38D26C, 0xFE53516F, 0xED03A29B, 0x1F682198,
-	0x5125DAD3, 0xA34E59D0, 0xB01EAA24, 0x42752927, 0x96BF4DCC, 0x64D4CECF, 0x77843D3B, 0x85EFBE38,
-	0xDBFC821C, 0x2997011F, 0x3AC7F2EB, 0xC8AC71E8, 0x1C661503, 0xEE0D9600, 0xFD5D65F4, 0x0F36E6F7,
-	0x61C69362, 0x93AD1061, 0x80FDE395, 0x72966096, 0xA65C047D, 0x5437877E, 0x4767748A, 0xB50CF789,
-	0xEB1FCBAD, 0x197448AE, 0x0A24BB5A, 0xF84F3859, 0x2C855CB2, 0xDEEEDFB1, 0xCDBE2C45, 0x3FD5AF46,
-	0x7198540D, 0x83F3D70E, 0x90A324FA, 0x62C8A7F9, 0xB602C312, 0x44694011, 0x5739B3E5, 0xA55230E6,
-	0xFB410CC2, 0x092A8FC1, 0x1A7A7C35, 0xE811FF36, 0x3CDB9BDD, 0xCEB018DE, 0xDDE0EB2A, 0x2F8B6829,
-	0x82F63B78, 0x709DB87B, 0x63CD4B8F, 0x91A6C88C, 0x456CAC67, 0xB7072F64, 0xA457DC90, 0x563C5F93,
-	0x082F63B7, 0xFA44E0B4, 0xE9141340, 0x1B7F9043, 0xCFB5F4A8, 0x3DDE77AB, 0x2E8E845F, 0xDCE5075C,
-	0x92A8FC17, 0x60C37F14, 0x73938CE0, 0x81F80FE3, 0x55326B08, 0xA759E80B, 0xB4091BFF, 0x466298FC,
-	0x1871A4D8, 0xEA1A27DB, 0xF94AD42F, 0x0B21572C, 0xDFEB33C7, 0x2D80B0C4, 0x3ED04330, 0xCCBBC033,
-	0xA24BB5A6, 0x502036A5, 0x4370C551, 0xB11B4652, 0x65D122B9, 0x97BAA1BA, 0x84EA524E, 0x7681D14D,
-	0x2892ED69, 0xDAF96E6A, 0xC9A99D9E, 0x3BC21E9D, 0xEF087A76, 0x1D63F975, 0x0E330A81, 0xFC588982,
-	0xB21572C9, 0x407EF1CA, 0x532E023E, 0xA145813D, 0x758FE5D6, 0x87E466D5, 0x94B49521, 0x66DF1622,
-	0x38CC2A06, 0xCAA7A905, 0xD9F75AF1, 0x2B9CD9F2, 0xFF56BD19, 0x0D3D3E1A, 0x1E6DCDEE, 0xEC064EED,
-	0xC38D26C4, 0x31E6A5C7, 0x22B65633, 0xD0DDD530, 0x0417B1DB, 0xF67C32D8, 0xE52CC12C, 0x1747422F,
-	0x49547E0B, 0xBB3FFD08, 0xA86F0EFC, 0x5A048DFF, 0x8ECEE914, 0x7CA56A17, 0x6FF599E3, 0x9D9E1AE0,
-	0xD3D3E1AB, 0x21B862A8, 0x32E8915C, 0xC083125F, 0x144976B4, 0xE622F5B7, 0xF5720643, 0x07198540,
-	0x590AB964, 0xAB613A67, 0xB831C993, 0x4A5A4A90, 0x9E902E7B, 0x6CFBAD78, 0x7FAB5E8C, 0x8DC0DD8F,
-	0xE330A81A, 0x115B2B19, 0x020BD8ED, 0xF0605BEE, 0x24AA3F05, 0xD6C1BC06, 0xC5914FF2, 0x37FACCF1,
-	0x69E9F0D5, 0x9B8273D6, 0x88D28022, 0x7AB90321, 0xAE7367CA, 0x5C18E4C9, 0x4F48173D, 0xBD23943E,
-	0xF36E6F75, 0x0105EC76, 0x12551F82, 0xE03E9C81, 0x34F4F86A, 0xC69F7B69, 0xD5CF889D, 0x27A40B9E,
-	0x79B737BA, 0x8BDCB4B9, 0x988C474D, 0x6AE7C44E, 0xBE2DA0A5, 0x4C4623A6, 0x5F16D052, 0xAD7D5351};
-
-/**
- * @brief Calculates digest (CRC32C).
- *
- * Calculates CRC32C with 0x82F63B78 polynomial
- * reflect according to iSCSI specs.\n
- * TODO: Implement optimized SSE4.2 and ARM versions
- *
- * @param[in] data Pointer to data to calculate CRC32C for.
- * @param[in] len Length of data to be calculated. Must be
- * divisable by 4 which is guaranteed by iSCSI standard.
- * @param[in] crc32c Previous CRC32C in case of multiple passes.
- * @return CRC32C value. THis function cannot fail.
- */
-static inline uint32_t iscsi_crc32c_update(const uint8_t *data, const uint len, uint32_t crc32c)
-{
-	for ( uint i = 0; i < len; i += 4 ) {
-		crc32c = (crc32c >> 8UL) ^ crc32c_lut[(crc32c ^ data[i]) & 0xFF];
-		crc32c = (crc32c >> 8UL) ^ crc32c_lut[(crc32c ^ data[i + 1]) & 0xFF];
-		crc32c = (crc32c >> 8UL) ^ crc32c_lut[(crc32c ^ data[i + 2]) & 0xFF];
-		crc32c = (crc32c >> 8UL) ^ crc32c_lut[(crc32c ^ data[i + 3]) & 0xFF];
-	}
-
-	return crc32c;
-}
-
-/**
- * @brief Calculate and store iSCSI header digest (CRC32C).
- *
- * Calculates header digest (CRC32C) with
- * 0x82F63B78 polynomial reflect according
- * to iSCSI specs and stores the result in
- * the iSCSI packet data. This function
- * cannot fail.
- *
- * @param[out] header_digest Pointer to iSCSI header digest
- * packet data to put CRC32C into.
- * May NOT be NULL, so be careful.
- * @param[in] packet_data Pointer to ISCSI BHS packet to
- * calculate CRC32C for. NULL is NOT
- * allowed here, take caution.
- * @param[in] ahs_len AHS segment length in bytes.
- */
-void iscsi_connection_pdu_digest_header_update(iscsi_header_digest *header_digest, const iscsi_bhs_packet *packet_data, const uint ahs_len)
-{
-	const uint32_t crc32c = iscsi_crc32c_update( (uint8_t *) packet_data, (sizeof(struct iscsi_bhs_packet) + ahs_len), ISCSI_CRC32C_INITIAL ) ^ ISCSI_CRC32C_XOR;
-
-	iscsi_put_le32( (uint8_t *) &header_digest->crc32c, crc32c );
-}
-
-/**
- * @brief Validates a stored iSCSI header digest (CRC32C) with actual header data.
- *
- * Verifies header digest (CRC32C) with
- * 0x82F63B78 polynomial reflect according
- * to iSCSI specs. This function cannot
- * fail.
- *
- * @param[in] header_digest Pointer to iSCSI header digest
- * packet data to compare CRC32C with.
- * May NOT be NULL, so be careful.
- * @param[in] packet_data Pointer to ISCSI BHS packet to
- * validate CRC32C for. May NOT be NULL,
- * so be careful.
- * @param[in] ahs_len AHS segment length in bytes.
- * @retval true CRC32C matches the stored value.
- * @retval false CRC32C does NOT match the stored value.
- */
-bool iscsi_connection_pdu_digest_header_verify(const iscsi_header_digest *header_digest, const iscsi_bhs_packet *packet_data, const uint ahs_len)
-{
-	const uint32_t crc32c = iscsi_crc32c_update( (uint8_t *) packet_data, (sizeof(struct iscsi_bhs_packet) + ahs_len), ISCSI_CRC32C_INITIAL ) ^ ISCSI_CRC32C_XOR;
-
-	return (iscsi_get_le32(crc32c) == header_digest->crc32c);
-}
-
-/**
- * @brief Calculate iSCSI data digest (CRC32C).
- *
- * Calculates data digest (CRC32) with
- * 0x82F63B78 polynomial reflect of a
- * whole DataSegment (CRC32C) according
- * to the iSCSI specs.\n
- * The resulting CRC32C will be stored
- * in the iSCSI packet.
- *
- * @param[out] data_digest Pointer to iSCSI data digest
- * packet data to put CRC32C into.
- * May NOT be NULL, so be careful.
- * @param[in] ds_cmd_data Pointer to iSCSI DataSegment packet to
- * calculate CRC32C for. NULL is NOT
- * allowed here, take caution.
- * @param[in] ds_len Data segment length in bytes.
- */
-void iscsi_connection_pdu_digest_data_update(iscsi_data_digest *data_digest, const iscsi_scsi_ds_cmd_data *ds_cmd_data, const uint32_t ds_len)
-{
-	const uint32_t crc32c = iscsi_crc32c_update( (uint8_t *) ds_cmd_data, ISCSI_ALIGN(ds_len, ISCSI_DIGEST_SIZE), ISCSI_CRC32C_INITIAL ) ^ ISCSI_CRC32C_XOR;
-
-	iscsi_put_le32( (uint8_t *) &data_digest->crc32c, crc32c );
-}
-
-/**
- * @brief Validates a stored iSCSI data digest (CRC32C) with actual DataSegment.
- *
- * Verifies data digest (CRC32C) with
- * 0x82F63B78 polynomial reflect according
- * to iSCSI specs. This function cannot
- * fail.
- *
- * @param[out] data_digest Pointer to iSCSI data digest
- * packet data to compare CRC32C with.
- * May NOT be NULL, so be careful.
- * @param[in] ds_cmd_data Pointer to iSCSI DataSegment
- * packet to calculate CRC32C for. May NOT
- * be NULL, so be careful.
- * @param[in] ds_len Data segment length in bytes.
- * @retval true CRC32C matches the stored value.
- * @retval false CRC32C does NOT match the stored value.
- */
-bool iscsi_connection_pdu_digest_data_verify(const iscsi_data_digest *data_digest, const iscsi_scsi_ds_cmd_data *ds_cmd_data, const uint32_t ds_len)
-{
-	const uint32_t crc32c = iscsi_crc32c_update( (uint8_t *) ds_cmd_data, ISCSI_ALIGN(ds_len, ISCSI_DIGEST_SIZE), ISCSI_CRC32C_INITIAL ) ^ ISCSI_CRC32C_XOR;
-
-	return (iscsi_get_le32(crc32c) == data_digest->crc32c);
-}
-
-/**
- * @brief Checks whether iSCSI PDU cleanup procedure has to be deferred.
- *
- * This function checks whether the cleanup
- * process of a written PDU has to be
- * deferred to a later stage.
- *
- * @param[in] pdu Pointer to iSCSI PDU to be checked for
- * deferrred cleanup processs.
- * @retval true The PDUs cleanup stage has to be
- * deferred to a later stage.
- * @retval false The PDU can be cleaned up immediately.
- */
-static inline bool iscsi_connection_pdu_free_is_deferred(const iscsi_pdu *pdu)
-{
-	return ((pdu != NULL) && ((pdu->bhs_pkt->opcode == ISCSI_OPCODE_SERVER_READY_XFER) || (pdu->bhs_pkt->opcode == ISCSI_OPCODE_SERVER_SCSI_DATA_IN)));
-}
-
-/**
- * @brief Handles iSCSI PDU cleanup after the PDU has been sent via TCP/IP to the client.
- *
- * This function checks whether there are PDU
- * cleanup actions required and either frees
- * the PDU or adds it to the PDU Sequence
- * Number Acknowledgement (SNACK) list.
- *
- * @param[in] user_data Pointer to iSCSI PDU which completed
- * the TCP/IP write. May NOT be NULL, so be
- * careful.
- */
-static void iscsi_connection_pdu_write_complete(uint8_t *user_data, int err)
-{
-	iscsi_pdu *pdu         = (iscsi_pdu *) user_data;
-	iscsi_connection *conn = pdu->conn;
-
-	if ( conn->state >= ISCSI_CONNECT_STATE_EXITING )
-		return;
-
-	iscsi_list_remove( &pdu->node );
-
-	if ( err != 0 )
-		conn->state = ISCSI_CONNECT_STATE_EXITING;
-
-	if ( ((conn->flags & ISCSI_CONNECT_FLAGS_FULL_FEATURE) != 0) && (conn->session->err_recovery_level > 0UL) && iscsi_connection_pdu_free_is_deferred( pdu ) )
-		iscsi_list_enqueue( &conn->pdus_snack, &pdu->node );
-	else
-		iscsi_connection_pdu_free( conn, pdu );
-}
-
-/**
  * @brief Writes and sends a response PDU to the client.
  *
  * This function sends a response PDU to the
@@ -11309,50 +3006,30 @@ static void iscsi_connection_pdu_write_complete(uint8_t *user_data, int err)
  * be calculated, this is done as well.
  *
  * @param[in] conn Pointer to iSCSI connection to handle. May
- * NOT be NULL, so take caution.
+ * NOT be NULL, so take caution. Will be freed after sending,
+ * so don't access afterwards.
  * @param[in] pdu Pointer to iSCSI server response PDU to send.
  * May NOT be NULL, so be careful.
- * @param[in] callback Callback function to be invoked
- * after TCP/IP packet has been sent successfully.
- * May be NULL in case no further action is required.
- * @param[in,out] user_data Data for the callback
- * function. May be NULL if the callback function
- * doesn't require additional data.
  */
-void iscsi_connection_pdu_write(iscsi_connection *conn, iscsi_pdu *pdu, iscsi_connection_xfer_complete_callback callback, uint8_t *user_data)
+static bool iscsi_connection_pdu_write(iscsi_connection *conn, iscsi_pdu *pdu)
 {
-	if ( ISCSI_GET_OPCODE(pdu->bhs_pkt->opcode) != ISCSI_OPCODE_CLIENT_LOGIN_REQ ) {
-		if ( pdu->header_digest != NULL )
-			iscsi_connection_pdu_digest_header_update( pdu->header_digest, pdu->bhs_pkt, pdu->ahs_len );
-
-		if ( pdu->data_digest != NULL )
-			iscsi_connection_pdu_digest_data_update( pdu->data_digest, pdu->ds_cmd_data, pdu->ds_len );
+	if ( conn->state >= ISCSI_CONNECT_STATE_EXITING ) {
+		iscsi_connection_pdu_destroy( pdu );
+		return false;
 	}
 
-	pdu->xfer_complete_callback  = callback;
-	pdu->xfer_complete_user_data = user_data;
-
-	iscsi_list_enqueue( &conn->pdus_write, &pdu->node );
+	// During allocation we already round up to ISCSI_ALIGN_SIZE, but store the requested size in the ds_len
+	// member, so it's safe to round up here before sending, the accessed memory will be valid and zeroed
+	const size_t len = (sizeof(struct iscsi_bhs_packet) + pdu->ahs_len + ISCSI_ALIGN(pdu->ds_len, ISCSI_ALIGN_SIZE));
+	const ssize_t rc = sock_sendAll( conn->client->sock, pdu->bhs_pkt, len, ISCSI_CONNECT_SOCKET_WRITE_RETRIES );
 
-	if ( conn->state >= ISCSI_CONNECT_STATE_EXITING )
-		return;
-
-	const uint32_t len                      = (uint) (sizeof(struct iscsi_bhs_packet) + pdu->ahs_len + conn->header_digest + ISCSI_ALIGN(pdu->ds_len, ISCSI_ALIGN_SIZE) + conn->data_digest);
-	const int32_t rc                        = iscsi_connection_write( conn, (uint8_t *) pdu->bhs_pkt, len );
-	iscsi_connection_exec_queue *exec_queue = (iscsi_connection_exec_queue *) malloc( sizeof(struct iscsi_connection_exec_queue) );
-
-	if ( exec_queue == NULL ) {
-		logadd( LOG_ERROR, "iscsi_connection_pdu_write: Out of memory while allocating execution queue for PDU write" );
+	iscsi_connection_pdu_destroy( pdu );
 
-		return;
+	if ( rc != (ssize_t)len ) {
+		conn->state = ISCSI_CONNECT_STATE_EXITING;
+		return false;
 	}
-
-	exec_queue->data.pdu_write.callback  = iscsi_connection_pdu_write_complete;
-	exec_queue->data.pdu_write.user_data = (uint8_t *) pdu;
-	exec_queue->data.pdu_write.err       = ((rc == (int32_t) len) ? 0 : -1);
-	exec_queue->type                     = ISCSI_CONNECT_EXEC_QUEUE_TYPE_PDU_WRITE;
-
-	iscsi_list_enqueue( &conn->exec_queue, &exec_queue->node );
+	return true;
 }
 
 /**
@@ -11394,34 +3071,6 @@ static inline int iscsi_seq_num_cmp_gt(const uint32_t seq_num, const uint32_t se
 }
 
 /**
- * @brief Removes an acknowledged PDU from SNACK PDU doubly linked list by ExpStatSN.
- *
- * This function is invoked when ExpStatSN becomes
- * invalid.
- *
- * @param[in] conn Pointer to iSCSI connection to be removed,
- * may NOT be NULL, so be careful.
- * @param[in] exp_stat_sn First ExpStatSN to not to be removed.
- */
-void iscsi_connection_pdu_ack_remove(iscsi_connection *conn, const uint32_t exp_stat_sn)
-{
-	conn->exp_stat_sn = ((exp_stat_sn < conn->stat_sn) ? exp_stat_sn : conn->stat_sn);
-
-	iscsi_pdu *pdu;
-	iscsi_pdu *tmp;
-
-	iscsi_list_foreach_safe_node ( &conn->pdus_snack, pdu, tmp ) {
-		iscsi_scsi_response_packet *scsi_response_pkt = (iscsi_scsi_response_packet *) pdu->bhs_pkt;
-		const uint32_t stat_sn                        = iscsi_get_be32(scsi_response_pkt->stat_sn);
-
-		if ( iscsi_seq_num_cmp_lt( stat_sn, conn->exp_stat_sn ) ) {
-			iscsi_list_remove( &pdu->node );
-			iscsi_connection_pdu_free( conn, pdu );
-		}
-	}
-}
-
-/**
  * @brief Constructs and sends an iSCSI reject response to the client.
  *
  * This function constructs an reject response PDU with its
@@ -11432,7 +3081,7 @@ void iscsi_connection_pdu_ack_remove(iscsi_connection *conn, const uint32_t exp_
  * @param[in] conn Pointer to iSCSI connection for reject packet construction.
  * @param[in] pdu Pointer to iSCSI source PDU which contains the rejected packet data.
  * @param[in] reason_code Reason code for rejected packet data.
- * @retval -1 An error occured during reject packet generation,
+ * @retval -1 An error ocurred during reject packet generation,
  * currently only happens on memory exhaustion.
  * @retval 0 Reject packet and PDU constructed and sent successfully to the client.
  */
@@ -11441,7 +3090,7 @@ static int iscsi_connection_handle_reject(iscsi_connection *conn, iscsi_pdu *pdu
 	pdu->flags |= ISCSI_PDU_FLAGS_REJECTED;
 
 	const uint32_t ds_len   = (uint32_t) sizeof(struct iscsi_bhs_packet) + ((uint32_t) pdu->bhs_pkt->total_ahs_len << 2UL);
-	iscsi_pdu *response_pdu = iscsi_connection_pdu_create( conn, 0U, conn->header_digest, ds_len, conn->data_digest );
+	iscsi_pdu *response_pdu = iscsi_connection_pdu_create( conn, ds_len );
 
 	if ( response_pdu == NULL ) {
 		logadd( LOG_ERROR, "iscsi_connection_handle_reject: Out of memory while allocating iSCSI reject response PDU" );
@@ -11473,7 +3122,7 @@ static int iscsi_connection_handle_reject(iscsi_connection *conn, iscsi_pdu *pdu
 
 	memcpy( response_pdu->ds_cmd_data, pdu->bhs_pkt, ds_len );
 
-	iscsi_connection_pdu_write( conn, response_pdu, NULL, NULL );
+	iscsi_connection_pdu_write( conn, response_pdu );
 
 	return ISCSI_CONNECT_PDU_READ_OK;
 }
@@ -11504,12 +3153,18 @@ static int iscsi_connection_update_cmd_sn(iscsi_connection *conn, iscsi_pdu *pdu
 
 	pdu->cmd_sn = iscsi_get_be32(scsi_cmd_pkt->cmd_sn);
 
-	if ( session->err_recovery_level == 0UL ) {
-		if ( (scsi_cmd_pkt->opcode & ISCSI_OPCODE_FLAGS_IMMEDIATE) == 0 ) {
-			if ( (iscsi_seq_num_cmp_lt( pdu->cmd_sn, session->exp_cmd_sn ) || iscsi_seq_num_cmp_gt( pdu->cmd_sn, session->max_cmd_sn )) && ((session->type == ISCSI_SESSION_TYPE_NORMAL) && (opcode != ISCSI_OPCODE_CLIENT_SCSI_DATA_OUT)) )
-				return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-		} else if ( (pdu->cmd_sn != session->exp_cmd_sn) && (opcode != ISCSI_OPCODE_CLIENT_NOP_OUT) )
+	if ( (scsi_cmd_pkt->opcode & ISCSI_OPCODE_FLAGS_IMMEDIATE) == 0 ) {
+		if ( (iscsi_seq_num_cmp_lt( pdu->cmd_sn, session->exp_cmd_sn )
+				|| iscsi_seq_num_cmp_gt( pdu->cmd_sn, session->max_cmd_sn ))
+				&& ((session->type == ISCSI_SESSION_TYPE_NORMAL) && (opcode != ISCSI_OPCODE_CLIENT_SCSI_DATA_OUT)) ) {
+			logadd( LOG_WARNING, "Seqnum messup. Is: %u, want >= %u, < %u",
+				pdu->cmd_sn, session->exp_cmd_sn, session->max_cmd_sn );
 			return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
+		}
+	} else if ( (pdu->cmd_sn != session->exp_cmd_sn) && (opcode != ISCSI_OPCODE_CLIENT_NOP_OUT) ) {
+		logadd( LOG_WARNING, "Seqnum messup. Is: %u, want: %u",
+			pdu->cmd_sn, session->exp_cmd_sn );
+		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
 	}
 
 	uint32_t exp_stat_sn = iscsi_get_be32(scsi_cmd_pkt->exp_stat_sn);
@@ -11517,9 +3172,6 @@ static int iscsi_connection_update_cmd_sn(iscsi_connection *conn, iscsi_pdu *pdu
 	if ( iscsi_seq_num_cmp_gt( exp_stat_sn, conn->stat_sn ) )
 		exp_stat_sn = conn->stat_sn;
 
-	if ( session->err_recovery_level > 0UL )
-		iscsi_connection_pdu_ack_remove( conn, exp_stat_sn );
-
 	if ( ((scsi_cmd_pkt->opcode & ISCSI_OPCODE_FLAGS_IMMEDIATE) == 0) && (opcode != ISCSI_OPCODE_CLIENT_SCSI_DATA_OUT) )
 		session->exp_cmd_sn++;
 
@@ -11543,7 +3195,8 @@ static int iscsi_connection_update_cmd_sn(iscsi_connection *conn, iscsi_pdu *pdu
  */
 static int iscsi_connection_pdu_header_handle_login_req(iscsi_connection *conn, iscsi_pdu *pdu)
 {
-	if ( ((conn->flags & ISCSI_CONNECT_FLAGS_FULL_FEATURE) != 0) && (conn->session != NULL) && (conn->session->type == ISCSI_SESSION_TYPE_DISCOVERY) )
+	if ( ((conn->flags & ISCSI_CONNECT_FLAGS_FULL_FEATURE) != 0) && (conn->session != NULL)
+			&& (conn->session->type == ISCSI_SESSION_TYPE_DISCOVERY) )
 		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
 
 	const iscsi_login_req_packet *login_req_pkt = (iscsi_login_req_packet *) pdu->bhs_pkt;
@@ -11553,7 +3206,7 @@ static int iscsi_connection_pdu_header_handle_login_req(iscsi_connection *conn,
 	if ( pdu->ds_len > ISCSI_DEFAULT_RECV_DS_LEN )
 		return iscsi_connection_handle_reject( conn, pdu, ISCSI_REJECT_REASON_PROTOCOL_ERR );
 
-	iscsi_pdu *login_response_pdu = iscsi_connection_pdu_create( conn, 0U, 0, ISCSI_DEFAULT_RECV_DS_LEN, 0 );
+	iscsi_pdu *login_response_pdu = iscsi_connection_pdu_create( conn, 8192 );
 
 	if ( login_response_pdu == NULL )
 		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
@@ -11561,7 +3214,7 @@ static int iscsi_connection_pdu_header_handle_login_req(iscsi_connection *conn,
 	const int rc = iscsi_connection_pdu_login_response_init( login_response_pdu, pdu );
 
 	if ( rc < 0 ) {
-		iscsi_connection_pdu_login_response( conn, login_response_pdu, NULL, iscsi_connection_pdu_login_err_complete );
+		iscsi_connection_pdu_login_response( conn, login_response_pdu );
 
 		return ISCSI_CONNECT_PDU_READ_OK;
 	}
@@ -11624,46 +3277,17 @@ static int iscsi_connection_pdu_header_handle_nop_out(iscsi_connection *conn, is
  */
 static int iscsi_connection_pdu_header_handle_scsi_cmd(iscsi_connection *conn, iscsi_pdu *pdu)
 {
-	iscsi_scsi_cmd_packet *stat_scsi_cmd_pkt = (iscsi_scsi_cmd_packet *) pdu->bhs_pkt;
-	uint64_t stat_opcode = (uint64_t) stat_scsi_cmd_pkt->scsi_cdb.opcode;
-	uint64_t *stat_value = NULL;
-	int stat_rc = iscsi_hashmap_get( conn->stat_scsi_opcodes, (uint8_t *) &stat_opcode, sizeof(stat_opcode), (uint8_t **) &stat_value );
-
-	if ( stat_value == NULL ) {
-		stat_value = malloc( sizeof(uint64_t) );
-
-		if ( stat_value != NULL ) {
-			uint8_t *stat_key = iscsi_hashmap_key_create( (uint8_t *) &stat_opcode, sizeof(stat_opcode) );
-
-			if ( stat_key != NULL ) {
-				*stat_value = 0ULL;
-
-				stat_rc = iscsi_hashmap_put( conn->stat_scsi_opcodes, stat_key, sizeof(stat_opcode), (uint8_t *) stat_value );
-
-				if ( stat_rc < 0 ) {
-					iscsi_hashmap_key_destroy( stat_key );
-					free( stat_value );
-					stat_value = NULL;
-				}
-			} else {
-				free( stat_value );
-				stat_value = NULL;
-			}
-		}
-	}
-
-	if ( stat_value != NULL )
-		(*stat_value)++;
-
 	if ( conn->session->type != ISCSI_SESSION_TYPE_NORMAL )
 		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
 
 	iscsi_scsi_cmd_packet *scsi_cmd_pkt = (iscsi_scsi_cmd_packet *) pdu->bhs_pkt;
 
-	if ( (scsi_cmd_pkt->flags_task & (ISCSI_SCSI_CMD_FLAGS_TASK_READ | ISCSI_SCSI_CMD_FLAGS_TASK_WRITE)) == (ISCSI_SCSI_CMD_FLAGS_TASK_READ | ISCSI_SCSI_CMD_FLAGS_TASK_WRITE) ) // Bidirectional transfer is not supported
+	if ( (scsi_cmd_pkt->flags_task & (ISCSI_SCSI_CMD_FLAGS_TASK_READ | ISCSI_SCSI_CMD_FLAGS_TASK_WRITE))
+			== (ISCSI_SCSI_CMD_FLAGS_TASK_READ | ISCSI_SCSI_CMD_FLAGS_TASK_WRITE) ) { // Bidirectional transfer is not supported
 		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
+	}
 
-	iscsi_task *task = iscsi_task_create( conn, NULL, iscsi_scsi_task_xfer_complete );
+	iscsi_task *task = iscsi_task_create( conn );
 
 	if ( task == NULL )
 		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
@@ -11674,29 +3298,10 @@ static int iscsi_connection_pdu_header_handle_scsi_cmd(iscsi_connection *conn, i
 	task->scsi_task.len         = (uint) (((uint8_t *) pdu->ds_cmd_data) - ((uint8_t *) pdu->bhs_pkt));
 	task->scsi_task.cdb         = &scsi_cmd_pkt->scsi_cdb;
 	task->scsi_task.xfer_len    = exp_xfer_len;
-	task->scsi_task.target_port = conn->target_port;
-	task->scsi_task.init_port   = conn->init_port;
 	task->init_task_tag         = iscsi_get_be32(scsi_cmd_pkt->init_task_tag);
-	task->pdu                   = pdu;
-	pdu->ref++;
 
 	const uint64_t lun = iscsi_get_be64(scsi_cmd_pkt->lun);
-	const int lun_id   = iscsi_scsi_lun_get_from_iscsi( lun );
-
-	task->lun_id = lun_id;
-
-	pthread_rwlock_rdlock( &conn->device->luns_rwlock );
-
-	task->scsi_task.lun = iscsi_device_find_lun( conn->device, lun_id );
-
-	pthread_rwlock_unlock( &conn->device->luns_rwlock );
-
-	if ( task->scsi_task.lun == NULL ) {
-		iscsi_scsi_task_lun_process_none( &task->scsi_task );
-		iscsi_scsi_task_xfer_complete( &task->scsi_task );
-
-		return ISCSI_CONNECT_PDU_READ_OK;
-	}
+	task->lun_id       = iscsi_scsi_lun_get_from_iscsi( lun );
 
 	if ( ((scsi_cmd_pkt->flags_task & (ISCSI_SCSI_CMD_FLAGS_TASK_READ | ISCSI_SCSI_CMD_FLAGS_TASK_WRITE)) == 0) && (exp_xfer_len > 0UL) ) {
 		iscsi_task_destroy( task );
@@ -11704,42 +3309,11 @@ static int iscsi_connection_pdu_header_handle_scsi_cmd(iscsi_connection *conn, i
 		return iscsi_connection_handle_reject( conn, pdu, ISCSI_REJECT_REASON_INVALID_PDU_FIELD );
 	}
 
-	if ( (scsi_cmd_pkt->flags_task & ISCSI_SCSI_CMD_FLAGS_TASK_READ) != 0 ) {
+	if ( (scsi_cmd_pkt->flags_task & ISCSI_SCSI_CMD_FLAGS_TASK_READ) != 0 )
 		task->scsi_task.flags |= ISCSI_SCSI_TASK_FLAGS_XFER_READ;
-	} else if ( (scsi_cmd_pkt->flags_task & ISCSI_SCSI_CMD_FLAGS_TASK_WRITE) != 0 ) {
-		task->scsi_task.flags |= ISCSI_SCSI_TASK_FLAGS_XFER_WRITE;
-
-		if ( (conn->session->err_recovery_level > 0UL) && (iscsi_r2t_find_pdu_bhs( conn, pdu ) != NULL) ) {
-			iscsi_task_response( conn, task );
-			iscsi_task_destroy( task );
 
-			return ISCSI_CONNECT_PDU_READ_OK;
-		}
-
-		if ( pdu->ds_len > (uint) (sizeof(struct iscsi_bhs_packet) + ISCSI_MAX_AHS_SIZE + conn->header_digest + iscsi_globvec->first_burst_len + conn->data_digest) ) {
-			iscsi_task_destroy( task );
-
-			return iscsi_connection_handle_reject( conn, pdu, ISCSI_REJECT_REASON_PROTOCOL_ERR );
-		}
-
-		if ( pdu->ds_len > exp_xfer_len ) {
-			iscsi_task_destroy( task );
-
-			return iscsi_connection_handle_reject( conn, pdu, ISCSI_REJECT_REASON_PROTOCOL_ERR );
-		}
-
-		if ( (((conn->session->flags & ISCSI_SESSION_FLAGS_IMMEDIATE_DATA) == 0) && (pdu->ds_len > 0UL)) || (pdu->ds_len > conn->session->first_burst_len) ) {
-			iscsi_task_destroy( task );
-
-			return iscsi_connection_handle_reject( conn, pdu, ISCSI_REJECT_REASON_PROTOCOL_ERR );
-		}
-
-		if ( ((scsi_cmd_pkt->flags_task & ISCSI_SCSI_CMD_FLAGS_FINAL) != 0) && (pdu->ds_len < exp_xfer_len) ) {
-			if ( exp_xfer_len > ISCSI_DEFAULT_MAX_RECV_DS_LEN )
-				exp_xfer_len = ISCSI_DEFAULT_MAX_RECV_DS_LEN;
-
-			pdu->len = exp_xfer_len;
-		}
+	if ( (scsi_cmd_pkt->flags_task & ISCSI_SCSI_CMD_FLAGS_TASK_WRITE) != 0 ) {
+		return iscsi_connection_handle_reject( conn, pdu, ISCSI_REJECT_REASON_COMMAND_NOT_SUPPORTED );
 	}
 
 	pdu->task = task;
@@ -11748,28 +3322,6 @@ static int iscsi_connection_pdu_header_handle_scsi_cmd(iscsi_connection *conn, i
 }
 
 /**
- * @brief Handles an incoming iSCSI header task management function request PDU.
- *
- * This function handles task management function
- * request header data sent by the client.\n
- * If a response needs to be sent, this will
- * be done as well.
- *
- * @param[in] conn Pointer to iSCSI connection to handle. May
- * NOT be NULL, so take caution.
- * @param[in] pdu Pointer to iSCSI client request PDU to handle.
- * May be NULL in which case an error is returned.
- * @return 0 on success. A negative value indicates
- * an error. A positive value a warning.
- */
-static int iscsi_connection_pdu_header_handle_task_func_req(iscsi_connection *conn, iscsi_pdu *pdu)
-{
-	// TODO: Implement opcode.
-
-	return 0;
-}
-
-/**
  * @brief Handles an incoming iSCSI header text request PDU.
  *
  * This function handles text request header
@@ -11786,7 +3338,7 @@ static int iscsi_connection_pdu_header_handle_task_func_req(iscsi_connection *co
  */
 static int iscsi_connection_pdu_header_handle_text_req(iscsi_connection *conn, iscsi_pdu *pdu)
 {
-	if ( pdu->ds_len > (uint) (sizeof(struct iscsi_bhs_packet) + ISCSI_MAX_AHS_SIZE + conn->header_digest + iscsi_globvec->first_burst_len + conn->data_digest) )
+	if ( pdu->ds_len > (uint) (sizeof(struct iscsi_bhs_packet) + ISCSI_DEFAULT_RECV_DS_LEN) )
 		return iscsi_connection_handle_reject( conn, pdu, ISCSI_REJECT_REASON_PROTOCOL_ERR );
 
 	iscsi_text_req_packet *text_req_pkt = (iscsi_text_req_packet *) pdu->bhs_pkt;
@@ -11797,315 +3349,16 @@ static int iscsi_connection_pdu_header_handle_text_req(iscsi_connection *conn, i
 	if ( exp_stat_sn != conn->stat_sn )
 		conn->stat_sn = exp_stat_sn;
 
-	if ( (text_req_pkt->flags & (ISCSI_TEXT_REQ_FLAGS_CONTINUE | ISCSI_TEXT_REQ_FLAGS_FINAL)) == (ISCSI_TEXT_REQ_FLAGS_CONTINUE | ISCSI_TEXT_REQ_FLAGS_FINAL) )
+	if ( (text_req_pkt->flags & (ISCSI_TEXT_REQ_FLAGS_CONTINUE | ISCSI_TEXT_REQ_FLAGS_FINAL))
+			== (ISCSI_TEXT_REQ_FLAGS_CONTINUE | ISCSI_TEXT_REQ_FLAGS_FINAL) ) {
 		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-
-	if ( conn->session->current_text_init_task_tag == 0xFFFFFFFFUL )
-		conn->session->current_text_init_task_tag = init_task_tag;
-	else
-		return iscsi_connection_handle_reject( conn, pdu, ISCSI_REJECT_REASON_PROTOCOL_ERR );
-
-	return ISCSI_CONNECT_PDU_READ_OK;
-}
-
-/**
- * @brief Searches an iSCSI PDU by Basic Header Segment (BHS) in the Ready To Transfer (R2T) active and queued task hash map.
- *
- * This function searches for an iSCSI PDU by
- * iterating through the iSCSI connection active
- * and queued Ready To Transfer tasks hash map.
- *
- * @param[in] conn Pointer to iSCSI connection to
- * search in the active and queued Ready To
- * Transfer tasks hash map. May NOT be NULL, so
- * be careful.
- * @param[in] pdu Pointer to iSCSI PDU of which
- * the Basic Header Segment (BHS) should be
- * searched for. NULL is NOT allowed here, so
- * take caution.
- * @return Pointer to found iSCSI PDU or NULL in
- * case neither an iSCSI active nor enqueued
- * Ready To Transfer (R2T) task has a matching
- * Basic Header Segment (BHS).
- */
-iscsi_pdu *iscsi_r2t_find_pdu_bhs(iscsi_connection *conn, iscsi_pdu *pdu)
-{
-	iscsi_task *task;
-
-	iscsi_list_foreach_node ( &conn->r2t_tasks_active, task ) {
-		if ( memcmp( task->pdu->bhs_pkt, pdu->bhs_pkt, sizeof(struct iscsi_bhs_packet) ) == 0 )
-			return task->pdu;
 	}
 
-	iscsi_list_foreach_node ( &conn->r2t_tasks_queue, task ) {
-		if ( memcmp( task->pdu->bhs_pkt, pdu->bhs_pkt, sizeof(struct iscsi_bhs_packet) ) == 0 )
-			return task->pdu;
-	}
-
-	return NULL;
-}
-
-/**
- * @brief Sends an iSCSI Ready To Transfer Sequence Number (R2TSN) packet to the initiator.
- *
- * This function allocates and initializes a
- * Ready To Transfer Sequence Number (R2TSN)
- * packet to be sent to the client.
- *
- * @param[in] conn Pointer to iSCSI connection which
- * maintains the R2TSN, may NOT be NULL,
- * so be careful.
- * @param[in] task Pointer to iSCSI task handling
- * the R2TSN. NULL is NOT allowed here,
- * take caution.
- * @param[in,out] r2t_sn Pointer to 32-bit integer containing
- * the R2TSN which is incremented after
- * storing it in the response packet data.
- * NULL is prohibited, so take caution.
- * @param[in] pos Offset in bytes of transfer data.
- * @param[in] len Length in bytes of transfer data.
- * @param[in] target_xfer_tag Target Transfer Tag (TTT) for data.
- * @return 0 on successful packet sending, a negative
- * error code otherwise.
- */
-int iscsi_r2t_send(iscsi_connection *conn, iscsi_task *task, uint32_t *r2t_sn, const uint32_t pos, const uint32_t len, const uint32_t target_xfer_tag)
-{
-	iscsi_pdu *response_pdu = iscsi_connection_pdu_create( conn, 0U, conn->header_digest, 0UL, conn->data_digest );
-
-	if ( response_pdu == NULL ) {
-		logadd( LOG_ERROR, "iscsi_r2t_send: Out of memory while allocating iSCSI Ready To Transfer response PDU" );
-
-		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-	}
-
-	iscsi_r2t_packet *r2t_pkt = (iscsi_r2t_packet *) response_pdu->bhs_pkt;
-
-	r2t_pkt->opcode                       = ISCSI_OPCODE_SERVER_READY_XFER;
-	r2t_pkt->flags                        = -0x80;
-	r2t_pkt->reserved                     = 0U;
-	*(uint32_t *) &r2t_pkt->total_ahs_len = 0UL; // TotalAHSLength and DataSegmentLength are always 0, so write in one step.
-
-	const uint64_t lun = iscsi_scsi_lun_get_from_scsi( task->lun_id );
-
-	iscsi_put_be64( (uint8_t *) &r2t_pkt->lun, lun );
-	iscsi_put_be32( (uint8_t *) &r2t_pkt->init_task_tag, task->init_task_tag );
-	iscsi_put_be32( (uint8_t *) &r2t_pkt->target_xfer_tag, target_xfer_tag );
-	iscsi_put_be32( (uint8_t *) &r2t_pkt->stat_sn, conn->stat_sn );
-	iscsi_put_be32( (uint8_t *) &r2t_pkt->exp_cmd_sn, conn->session->exp_cmd_sn );
-	iscsi_put_be32( (uint8_t *) &r2t_pkt->max_cmd_sn, conn->session->max_cmd_sn );
-	r2t_pkt->data_sn = 0UL;
-	iscsi_put_be32( (uint8_t *) &r2t_pkt->r2t_sn, (*r2t_sn)++ );
-
-	task->r2t_data_sn = 0UL;
-
-	iscsi_put_be32( (uint8_t *) &r2t_pkt->buf_offset, (uint32_t) pos );
-	iscsi_put_be32( (uint8_t *) &r2t_pkt->des_data_xfer_len, (uint32_t) len );
-
-	response_pdu->task = task;
-	task->scsi_task.ref++;
-
-	iscsi_connection_pdu_write( conn, response_pdu, NULL, NULL );
-
-	return ISCSI_CONNECT_PDU_READ_OK;
-}
-
-/**
- * @brief Searches an iSCSI PDU task by Ready To Transfer Sequence Number (R2TSN) and removes it from PDU SNACK doubly linked list.
- *
- * This function searches for an iSCSI PDU task
- * by iterating through the iSCSI connection
- * Sequence Number Acknowledgement (SNACK)
- * and matches the Ready To Transfer Sequence
- * Number (R2TSN).\n
- * If found, the PDU will be removed from the
- * PDU SNACK doubly linked list.
- *
- * @param[in] conn Pointer to iSCSI connection to
- * search in the Sequence Number
- * Acknowledgement (SNACK) hash map. May NOT be
- * NULL, so be careful.
- * @param[in] task Pointer to iSCSI task to search
- * for in the Sequence Number Acknowledgement
- * (SNACK) hash map. NULL is not allowed here,
- * take caution.
- * @param[in] r2t_sn Ready To Transfer Sequence Number
- * (R2TSN) to be searched for.
- * @return Pointer to found iSCSI PDU or NULL in
- * case no iSCSI PDU has a matching Ready To Transfer
- * Sequence Number (R2TSN).
- */
-static iscsi_pdu *iscsi_r2t_remove_pdu_from_snack_list(iscsi_connection *conn, iscsi_task *task, const uint32_t r2t_sn)
-{
-	iscsi_pdu *pdu;
-
-	iscsi_list_foreach_node ( &conn->pdus_snack, pdu ) {
-		if ( pdu->bhs_pkt->opcode == ISCSI_OPCODE_SERVER_READY_XFER ) {
-			iscsi_r2t_packet *r2t_pkt = (iscsi_r2t_packet *) pdu->bhs_pkt;
-
-			if ( (pdu->task == task) && (iscsi_get_be32(r2t_pkt->r2t_sn) == r2t_sn) ) {
-				iscsi_list_remove( &pdu->node );
-
-				return pdu;
-			}
-		}
-	}
-
-	return NULL;
-}
-
-/**
- * @brief Resends the Ready To Transfer (R2T) packet data.
- *
- * This function either sends a new R2T packet or
- * resends an already sent one.
- *
- * @param[in] conn Pointer to iSCSI connection to send the
- * R2T packet for, may NOT be NULL, so be careful.
- * @param[in] task Pointer to iSCSI task responsible for
- * sending the R2T packet. NULL is NOT allowed
- * here, take caution.
- * @param[in] r2t_sn_ack R2TSN acknowledged number.
- * @param[in] r2t_sn_send_new 0 resends an already sent
- * R2T packet, any other value will send a new
- * packet.
- * @return 0 if packet was sent successfully, a negative
- * error code otherwise.
- */
-static int iscsi_r2t_recovery_send(iscsi_connection *conn, iscsi_task *task, const uint32_t r2t_sn_ack, const int r2t_sn_send_new)
-{
-	iscsi_pdu *pdu = iscsi_r2t_remove_pdu_from_snack_list( conn, task, r2t_sn_ack );
-
-	if ( pdu == NULL )
-		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-
-	iscsi_r2t_packet *r2t_pkt = (iscsi_r2t_packet *) pdu->bhs_pkt;
-
-	if ( r2t_sn_send_new != 0 ) {
-		const uint32_t des_data_xfer_len = r2t_pkt->des_data_xfer_len;
-
-		task->r2t_sn_ack++;
-
-		uint32_t len = (des_data_xfer_len - task->r2t_next_exp_pos);
-
-		if ( len > conn->session->max_burst_len )
-			len = conn->session->max_burst_len;
-
-		iscsi_connection_pdu_free( conn, pdu );
-
-		const int rc = iscsi_r2t_send( conn, task, &task->r2t_sn, task->r2t_next_exp_pos, len, task->target_xfer_tag );
-
-		if ( rc < 0 )
-			return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-	} else {
-		iscsi_put_be32( (uint8_t *) &r2t_pkt->stat_sn, conn->stat_sn );
-		iscsi_connection_pdu_write( conn, pdu, NULL, NULL );
-	}
-
-	return ISCSI_CONNECT_PDU_READ_OK;
-}
-
-/**
- * @brief Handles an incoming iSCSI header SCSI data out PDU.
- *
- * This function handles header SCSI data out
- * sent by the client.\n
- * If a response needs to be sent, this will
- * be done as well.
- *
- * @param[in] conn Pointer to iSCSI connection to handle. May
- * NOT be NULL, so take caution.
- * @param[in] pdu Pointer to iSCSI client request PDU to handle.
- * May be NULL in which case an error is returned.
- * @return 0 on success. A negative value indicates
- * an error. A positive value a warning.
- */
-static int iscsi_connection_pdu_header_handle_scsi_data_out(iscsi_connection *conn, iscsi_pdu *pdu)
-{
-	if ( conn->session->type == ISCSI_SESSION_TYPE_DISCOVERY )
-		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-
-	if ( pdu->ds_len > ISCSI_DEFAULT_MAX_RECV_DS_LEN )
-		return iscsi_connection_handle_reject( conn, pdu, ISCSI_REJECT_REASON_PROTOCOL_ERR );
-
-	iscsi_scsi_data_out_req_packet *scsi_data_out_req_pkt = (iscsi_scsi_data_out_req_packet *) pdu->bhs_pkt;
-	const uint32_t target_xfer_tag = iscsi_get_be32(scsi_data_out_req_pkt->target_xfer_tag);
-
-	iscsi_task *task = iscsi_task_find( conn, target_xfer_tag );
-
-	if ( task == NULL )
-		return iscsi_connection_handle_reject( conn, pdu, ISCSI_REJECT_REASON_INVALID_PDU_FIELD );
-
-	pthread_rwlock_rdlock( &conn->device->luns_rwlock );
-
-	iscsi_scsi_lun *lun = iscsi_device_find_lun( conn->device, task->lun_id );
-
-	pthread_rwlock_unlock( &conn->device->luns_rwlock );
-
-	if ( pdu->ds_len > ISCSI_DEFAULT_MAX_RECV_DS_LEN )
-		return iscsi_connection_handle_reject( conn, pdu, ISCSI_REJECT_REASON_PROTOCOL_ERR );
-
-	const uint32_t init_task_tag = iscsi_get_be32(scsi_data_out_req_pkt->init_task_tag);
-
-	if ( task->init_task_tag != init_task_tag )
-		return iscsi_connection_handle_reject( conn, pdu, ISCSI_REJECT_REASON_INVALID_PDU_FIELD );
-
-	const uint32_t data_sn = iscsi_get_be32(scsi_data_out_req_pkt->data_sn);
-
-	if ( data_sn != task->r2t_data_sn ) {
-		if ( conn->session->err_recovery_level > 0UL ) {
-			const int rc = iscsi_r2t_recovery_send( conn, task, task->r2t_sn_ack, 1 );
-
-			if ( rc == 0 )
-				return ISCSI_CONNECT_PDU_READ_OK;
-		}
-
-		return iscsi_connection_handle_reject( conn, pdu, ISCSI_REJECT_REASON_PROTOCOL_ERR );
-	}
-
-	const uint32_t buf_offset = iscsi_get_be32(scsi_data_out_req_pkt->buf_offset);
-
-	if ( buf_offset != task->r2t_next_exp_pos )
-		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-
-	const uint32_t xfer_len = task->scsi_task.xfer_len;
-
-	task->r2t_len           = pdu->ds_len;
-	task->r2t_next_exp_pos += pdu->ds_len;
-	task->r2t_data_sn++;
-
-	if ( task->r2t_len > conn->session->max_burst_len )
-		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-
-	if ( (int8_t) scsi_data_out_req_pkt->opcode < 0 )
-		task->r2t_len = 0UL;
-
-	if ( xfer_len == task->r2t_next_exp_pos ) {
-		task->r2t_sn_ack++;
-	} else if ( ((int8_t) scsi_data_out_req_pkt->opcode < 0) && (xfer_len > task->r2t_next_exp_pos) ) {
-		task->r2t_sn_ack++;
-
-		uint32_t len = (xfer_len - task->r2t_next_exp_pos);
-
-		if ( len > conn->session->max_burst_len )
-			len = conn->session->max_burst_len;
-
-		const int rc = iscsi_r2t_send( conn, task, &task->r2t_sn, task->r2t_next_exp_pos, len, task->target_xfer_tag );
-
-		if ( rc < 0 )
-			return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-
-		task->r2t_next_exp_pos += len;
-	}
-
-	if ( lun == NULL )
-		return iscsi_connection_handle_reject( conn, pdu, ISCSI_REJECT_REASON_PROTOCOL_ERR );
-
-	if ( task->scsi_task.buf != NULL ) {
-		pdu->ds_cmd_data = (iscsi_scsi_ds_cmd_data *) (task->scsi_task.buf + task->len);
-		pdu->ds_len      = ISCSI_DEFAULT_MAX_RECV_DS_LEN;
+	if ( conn->session->current_text_init_task_tag == 0xFFFFFFFFUL ) {
+		conn->session->current_text_init_task_tag = init_task_tag;
+		return ISCSI_CONNECT_PDU_READ_OK;
 	}
-
-	return ISCSI_CONNECT_PDU_READ_OK;
+	return iscsi_connection_handle_reject( conn, pdu, ISCSI_REJECT_REASON_PROTOCOL_ERR );
 }
 
 /**
@@ -12130,7 +3383,7 @@ static int iscsi_connection_pdu_header_handle_logout_req(iscsi_connection *conn,
 	if ( (conn->session != NULL) && (conn->session->type == ISCSI_SESSION_TYPE_DISCOVERY) && (logout_req_pkt->reason_code != ISCSI_LOGOUT_REQ_REASON_CODE_CLOSE_SESSION) )
 		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
 
-	iscsi_pdu *response_pdu = iscsi_connection_pdu_create( conn, 0U, conn->header_digest, 0UL, conn->data_digest );
+	iscsi_pdu *response_pdu = iscsi_connection_pdu_create( conn, 0UL );
 
 	if ( response_pdu == NULL ) {
 		logadd( LOG_ERROR, "iscsi_connection_pdu_header_handle_logout_req: Out of memory while allocating iSCSI logout response PDU" );
@@ -12161,8 +3414,7 @@ static int iscsi_connection_pdu_header_handle_logout_req(iscsi_connection *conn,
 	iscsi_put_be32( (uint8_t *) &logout_response_pkt->stat_sn, conn->stat_sn++ );
 
 	if ( conn->session != NULL ) {
-		if ( conn->session->conns == 1UL )
-			conn->session->max_cmd_sn++;
+		conn->session->max_cmd_sn++;
 
 		iscsi_put_be32( (uint8_t *) &logout_response_pkt->exp_cmd_sn, conn->session->exp_cmd_sn );
 		iscsi_put_be32( (uint8_t *) &logout_response_pkt->max_cmd_sn, conn->session->max_cmd_sn );
@@ -12176,34 +3428,12 @@ static int iscsi_connection_pdu_header_handle_logout_req(iscsi_connection *conn,
 	logout_response_pkt->time_retain = 0U;
 	logout_response_pkt->reserved5   = 0UL;
 
-	iscsi_connection_pdu_write( conn, response_pdu, NULL, NULL );
+	iscsi_connection_pdu_write( conn, response_pdu );
 
 	return ISCSI_CONNECT_PDU_READ_OK;
 }
 
 /**
- * @brief Handles an incoming iSCSI header SNACK request PDU.
- *
- * This function handles SNACK request header
- * data sent by the client.\n
- * If a response needs to be sent, this will
- * be done as well.
- *
- * @param[in] conn Pointer to iSCSI connection to handle. May
- * NOT be NULL, so take caution.
- * @param[in] pdu Pointer to iSCSI client request PDU to handle.
- * May be NULL in which case an error is returned.
- * @return 0 on success. A negative value indicates
- * an error. A positive value a warning.
- */
-static int iscsi_connection_pdu_header_handle_snack_req(iscsi_connection *conn, iscsi_pdu *pdu)
-{
-	// TODO: Implement opcode.
-
-	return 0;
-}
-
-/**
  * @brief Handles an incoming iSCSI header PDU.
  *
  * This function handles all header data sent
@@ -12229,16 +3459,17 @@ static int iscsi_connection_pdu_header_handle(iscsi_connection *conn, iscsi_pdu
 		return iscsi_connection_pdu_header_handle_login_req( conn, pdu );
 
 	if ( ((conn->flags & ISCSI_CONNECT_FLAGS_FULL_FEATURE) == 0) && (conn->state == ISCSI_CONNECT_STATE_RUNNING) ) {
-		iscsi_pdu *login_response_pdu = iscsi_connection_pdu_create( conn, 0U, 0, 0UL, 0 );
+		iscsi_pdu *login_response_pdu = iscsi_connection_pdu_create( conn, 0UL );
 
 		if ( login_response_pdu == NULL )
 			return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
 
 		iscsi_connection_login_response_reject( login_response_pdu, pdu );
-		iscsi_connection_pdu_write( conn, login_response_pdu, NULL, NULL );
+		iscsi_connection_pdu_write( conn, login_response_pdu );
 
 		return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
-	} else if ( conn->state == ISCSI_CONNECT_STATE_INVALID ) {
+	}
+	if ( conn->state == ISCSI_CONNECT_STATE_INVALID ) {
 		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
 	}
 
@@ -12258,41 +3489,23 @@ static int iscsi_connection_pdu_header_handle(iscsi_connection *conn, iscsi_pdu
 
 			break;
 		}
-		case ISCSI_OPCODE_CLIENT_TASK_FUNC_REQ : {
-			rc = iscsi_connection_pdu_header_handle_task_func_req( conn, pdu );
-
-			break;
-		}
 		case ISCSI_OPCODE_CLIENT_TEXT_REQ : {
 			rc = iscsi_connection_pdu_header_handle_text_req( conn, pdu );
 
 			break;
 		}
-		case ISCSI_OPCODE_CLIENT_SCSI_DATA_OUT : {
-			rc = iscsi_connection_pdu_header_handle_scsi_data_out( conn, pdu );
-
-			break;
-		}
 		case ISCSI_OPCODE_CLIENT_LOGOUT_REQ : {
 			rc = iscsi_connection_pdu_header_handle_logout_req( conn, pdu );
 
 			break;
 		}
-		case ISCSI_OPCODE_CLIENT_SNACK_REQ : {
-			rc = iscsi_connection_pdu_header_handle_snack_req( conn, pdu );
-
-			break;
-		}
 		default : {
-			return iscsi_connection_handle_reject( conn, pdu, ISCSI_REJECT_REASON_PROTOCOL_ERR );
+			rc = iscsi_connection_handle_reject( conn, pdu, ISCSI_REJECT_REASON_COMMAND_NOT_SUPPORTED );
 
 			break;
 		}
 	}
 
-	if ( rc < 0 )
-		logadd( LOG_ERROR, "Fatal error during header handler (opcode 0x%02x) detected for device %s", (int) opcode, (conn->device != NULL ? (char *) conn->device->name : "(null)") );
-
 	return rc;
 }
 
@@ -12316,8 +3529,8 @@ static int iscsi_connection_pdu_data_handle_nop_out(iscsi_connection *conn, iscs
 	iscsi_nop_out_packet *nop_out_pkt = (iscsi_nop_out_packet *) pdu->bhs_pkt;
 	uint32_t ds_len                   = pdu->ds_len;
 
-	if ( ds_len > conn->max_recv_ds_len )
-		ds_len = conn->max_recv_ds_len;
+	if ( ds_len > conn->session->opts.MaxRecvDataSegmentLength )
+		ds_len = conn->session->opts.MaxRecvDataSegmentLength;
 
 	const uint64_t lun           = iscsi_get_be64(nop_out_pkt->lun);
 	const uint32_t init_task_tag = iscsi_get_be32(nop_out_pkt->init_task_tag);
@@ -12327,7 +3540,7 @@ static int iscsi_connection_pdu_data_handle_nop_out(iscsi_connection *conn, iscs
 	if ( init_task_tag == 0xFFFFFFFFUL )
 		return ISCSI_CONNECT_PDU_READ_OK;
 
-	iscsi_pdu *response_pdu = iscsi_connection_pdu_create( conn, 0U, conn->header_digest, ds_len, conn->data_digest );
+	iscsi_pdu *response_pdu = iscsi_connection_pdu_create( conn, ds_len );
 
 	if ( response_pdu == NULL ) {
 		logadd( LOG_ERROR, "iscsi_connection_pdu_data_handle_nop_out: Out of memory while allocating iSCSI NOP-In response PDU" );
@@ -12342,8 +3555,8 @@ static int iscsi_connection_pdu_data_handle_nop_out(iscsi_connection *conn, iscs
 	nop_in_pkt->reserved        = 0U;
 	iscsi_put_be32( (uint8_t *) &nop_in_pkt->total_ahs_len, ds_len ); // TotalAHSLength is always 0 and DataSegmentLength is 24-bit, so write in one step.
 	iscsi_put_be64( (uint8_t *) &nop_in_pkt->lun, lun );
-	iscsi_put_be32( (uint8_t *) &nop_in_pkt->init_task_tag, init_task_tag );
 	nop_in_pkt->target_xfer_tag = 0xFFFFFFFFUL; // Minus one does not require endianess conversion
+	iscsi_put_be32( (uint8_t *) &nop_in_pkt->init_task_tag, init_task_tag );
 	iscsi_put_be32( (uint8_t *) &nop_in_pkt->stat_sn, conn->stat_sn++ );
 
 	if ( (nop_out_pkt->opcode & ISCSI_OPCODE_FLAGS_IMMEDIATE) == 0 )
@@ -12357,142 +3570,7 @@ static int iscsi_connection_pdu_data_handle_nop_out(iscsi_connection *conn, iscs
 	if ( ds_len != 0UL )
 		memcpy( response_pdu->ds_cmd_data, pdu->ds_cmd_data, ds_len );
 
-	iscsi_connection_pdu_write( conn, response_pdu, NULL, NULL );
-
-	// conn->nop_in_last = iscsi_get_ticks();
-
-	return ISCSI_CONNECT_PDU_READ_OK;
-}
-
-/**
- * @brief Handles an incoming iSCSI payload data SCSI read command request PDU.
- *
- * This function handles SCSI read command request
- * payload data sent by the client.\n
- * If a response needs to be sent, this will
- * be done as well.
- *
- * @param[in] conn Pointer to iSCSI connection to handle. May
- * NOT be NULL, so take caution.
- * @param[in] task Pointer to iSCSI task associated for reading.
- * May be NULL in which case an error is returned.
- * @return 0 on success. A negative value indicates
- * an error. A positive value a warning.
- */
-static int iscsi_connection_pdu_data_handle_scsi_cmd_read(iscsi_connection *conn, iscsi_task *task)
-{
-	if ( task->scsi_task.xfer_len <= ISCSI_DEFAULT_MAX_RECV_DS_LEN ) {
-		task->parent        = NULL;
-		task->scsi_task.buf = NULL;
-		task->scsi_task.pos = 0UL;
-		task->scsi_task.len = task->scsi_task.xfer_len;
-
-		iscsi_task_queue( conn, task );
-
-		return ISCSI_CONNECT_PDU_READ_OK;
-	}
-
-	iscsi_list_create( &task->sub_tasks );
-
-	task->pos = 0UL;
-
-	iscsi_list_enqueue( &conn->scsi_data_in_queued_tasks, &task->node );
-
-	return iscsi_connection_handle_scsi_data_in_queued_tasks( conn );
-}
-
-/**
- * @brief Creates and submits a sub task for writing.
- *
- * This function is also assigns the task with
- * an iSCSI PDU.
- *
- * @param[in] conn Pointer to iSCSI connection which handles
- * this task. May NOT be NULL, so be caureful.
- * @param[in] task Pointer to iSCSI task which should be the
- * parent of the new sub task. NULL if NOT
- * allowed here, so take caution.
- * @param[in] pdu Pointer to iSCSI PDU which contains
- * the desired buffer length to write. NULL
- * is a prohibited value here, take caution.
- * @param[in] buf Pointer to buffer containing
- * the write data and may NOT be NULL, so
- * be careful.
- * @return 0 on successful sub task submit or a
- * negative error code otherwise.
- */
-static int iscsi_task_sub_task_submit_write(iscsi_connection *conn, iscsi_task *task, iscsi_pdu *pdu, uint8_t *buf)
-{
-	iscsi_task *sub_task = iscsi_task_create( conn, task, iscsi_scsi_task_xfer_complete );
-
-	if ( sub_task == NULL )
-		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-
-	sub_task->scsi_task.buf = buf;
-	sub_task->scsi_task.pos = task->pos;
-	sub_task->scsi_task.len = pdu->ds_len;
-
-	pdu->task = sub_task;
-	pdu->ref++;
-
-	task->pos += pdu->ds_len;
-
-	iscsi_task_queue( conn, sub_task );
-
-	return ISCSI_CONNECT_PDU_READ_OK;
-}
-
-/**
- * @brief Handles an incoming iSCSI payload data SCSI write command request PDU.
- *
- * This function handles SCSI write command
- * request payload data sent by the client.\n
- * If a response needs to be sent, this will
- * be done as well.
- *
- * @param[in] conn Pointer to iSCSI connection to handle. May
- * NOT be NULL, so take caution.
- * @param[in] task Pointer to iSCSI task associated for reading.
- * May be NULL in which case an error is returned.
- * @return 0 on success. A negative value indicates
- * an error. A positive value a warning.
- */
-static int iscsi_connection_pdu_data_handle_scsi_cmd_write(iscsi_connection *conn, iscsi_task *task)
-{
-	iscsi_pdu *pdu                      = task->pdu;
-	iscsi_scsi_cmd_packet *scsi_cmd_pkt = (iscsi_scsi_cmd_packet *) pdu->bhs_pkt;
-	const uint32_t xfer_len             = task->scsi_task.xfer_len;
-
-	if ( ((scsi_cmd_pkt->flags_task & ISCSI_SCSI_CMD_FLAGS_FINAL) != 0) && (pdu->ds_len < xfer_len) ) {
-		int rc = iscsi_task_xfer_add( conn, task );
-
-		if ( rc < 0 ) {
-			iscsi_task_destroy( task );
-
-			return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-		}
-
-		if ( pdu->ds_len != 0UL ) {
-			rc = iscsi_task_sub_task_submit_write( conn, task, pdu, (uint8_t *) pdu->ds_cmd_data );
-
-			if ( rc < 0 ) {
-				iscsi_task_destroy( task );
-
-				return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-			}
-		}
-
-		return ISCSI_CONNECT_PDU_READ_OK;
-	}
-
-	if ( pdu->ds_len == xfer_len ) {
-		iscsi_scsi_task *scsi_task = &task->scsi_task;
-
-		scsi_task->buf = (uint8_t *) pdu->ds_cmd_data;
-		scsi_task->len = xfer_len;
-	}
-
-	iscsi_task_queue( conn, task );
+	iscsi_connection_pdu_write( conn, response_pdu );
 
 	return ISCSI_CONNECT_PDU_READ_OK;
 }
@@ -12519,212 +3597,22 @@ static int iscsi_connection_pdu_data_handle_scsi_cmd(iscsi_connection *conn, isc
 	if ( task == NULL )
 		return ISCSI_CONNECT_PDU_READ_OK;
 
-	pthread_rwlock_rdlock( &conn->device->luns_rwlock );
-
-	if ( iscsi_device_find_lun( conn->device, task->lun_id ) == NULL ) {
-		pthread_rwlock_unlock( &conn->device->luns_rwlock );
+	if ( task->lun_id != ISCSI_DEFAULT_LUN ) {
+		logadd( LOG_WARNING, "Received SCSI command for unknown LUN %d", task->lun_id );
 		iscsi_scsi_task_lun_process_none( &task->scsi_task );
-		iscsi_scsi_task_xfer_complete( &task->scsi_task );
+		iscsi_scsi_task_xfer_complete( &task->scsi_task, pdu );
 
 		return ISCSI_CONNECT_PDU_READ_OK;
 	}
 
-	pthread_rwlock_unlock( &conn->device->luns_rwlock );
-
 	if ( (task->scsi_task.flags & ISCSI_SCSI_TASK_FLAGS_XFER_READ) != 0 ) {
-		return iscsi_connection_pdu_data_handle_scsi_cmd_read( conn, task );
-	} else if ( (task->scsi_task.flags & ISCSI_SCSI_TASK_FLAGS_XFER_WRITE) != 0 ) {
-		return iscsi_connection_pdu_data_handle_scsi_cmd_write( conn, task );
-	} else if ( (task->scsi_task.flags & (ISCSI_SCSI_TASK_FLAGS_XFER_READ | ISCSI_SCSI_TASK_FLAGS_XFER_WRITE)) == 0 ) {
-		iscsi_task_queue( conn, task );
-
-		return ISCSI_CONNECT_PDU_READ_OK;
-	}
-
-	pdu->task = NULL;
-	iscsi_task_destroy( task );
-
-	return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-}
-
-/**
- * @brief Negotiates connection authentication method (none or CHAP).
- *
- * This function updates the key and value pairs if, and only if
- * CHAP is either disabled or required.
- *
- * @param[in] conn Pointer to iSCSI connection to update the key
- * and value pairs for. May NOT be NULL, so be careful.
- * @return 0 on successful update, a negative error code otherwise.
- */
-static int iscsi_connection_chap_negotiate(iscsi_connection *conn)
-{
-	int rc = 0;
-
-	if ( (conn->flags & ISCSI_CONNECT_FLAGS_CHAP_DISABLE) != 0 )
-		rc = iscsi_update_key_value_pair( conn->key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD, (uint8_t *) "None" );
-	else if ( (conn->flags & ISCSI_CONNECT_FLAGS_CHAP_REQUIRE) != 0 )
-		rc = iscsi_update_key_value_pair( conn->key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD, (uint8_t *) "CHAP" );
-
-	return rc;
-}
-
-/**
- * @brief Discovers iSCSI CHAP authentication session.
- *
- * This function copies over the global CHAP configuration
- * into the iSCSI connection structure and then negotiates.
- *
- * @param[in] conn Pointer to iSCSI connection for iSCSI
- * CHAP authentication discovery. May NOT be
- * NULL, so be careful.
- * @return 0 on successful negotiation, a negative error
- * code otherwise.
- */
-static int iscsi_connection_login_session_chap_discovery(iscsi_connection *conn)
-{
-	conn->flags &= ~(ISCSI_CONNECT_FLAGS_CHAP_DISABLE | ISCSI_CONNECT_FLAGS_CHAP_REQUIRE | ISCSI_CONNECT_FLAGS_CHAP_MUTUAL);
-
-	if ( (iscsi_globvec->flags & ISCSI_GLOBALS_FLAGS_CHAP_DISABLE) != 0 )
-		conn->flags |= ISCSI_CONNECT_FLAGS_CHAP_DISABLE;
-
-	if ( (iscsi_globvec->flags & ISCSI_GLOBALS_FLAGS_CHAP_REQUIRE) != 0 )
-		conn->flags |= ISCSI_CONNECT_FLAGS_CHAP_REQUIRE;
-
-	if ( (iscsi_globvec->flags & ISCSI_GLOBALS_FLAGS_CHAP_MUTUAL) != 0 )
-		conn->flags |= ISCSI_CONNECT_FLAGS_CHAP_MUTUAL;
-
-	conn->chap_group = iscsi_globvec->chap_group;
-
-	return iscsi_connection_chap_negotiate( conn );
-}
-
-/**
- * @brief Negotiates CHAP authentication.
- *
- * This function updates the key and value pairs if, and only if
- * CHAP authentication is either disabled or required in the
- * target node.
- *
- * @param[in] conn Pointer to iSCSI connection to update the key
- * and value pairs for. May NOT be NULL, so be careful.
- * @param[in] target Pointer to iSCSI target node used to check
- * the CHAP authentication. NULL is not allowed here,
- * so take caution.
- * @return 0 on successful update, a negative error code otherwise.
- */
-static int iscsi_connection_login_chap_negotiate(iscsi_connection *conn, const iscsi_target_node *target)
-{
-	conn->flags &= ~(ISCSI_CONNECT_FLAGS_CHAP_DISABLE | ISCSI_CONNECT_FLAGS_CHAP_REQUIRE | ISCSI_CONNECT_FLAGS_CHAP_MUTUAL);
-
-	if ( (target->flags & ISCSI_TARGET_NODE_FLAGS_CHAP_DISABLE) != 0 )
-		conn->flags |= ISCSI_CONNECT_FLAGS_CHAP_DISABLE;
-
-	if ( (target->flags & ISCSI_TARGET_NODE_FLAGS_CHAP_REQUIRE) != 0 )
-		conn->flags |= ISCSI_CONNECT_FLAGS_CHAP_REQUIRE;
-
-	if ( (target->flags & ISCSI_TARGET_NODE_FLAGS_CHAP_MUTUAL) != 0 )
-		conn->flags |= ISCSI_CONNECT_FLAGS_CHAP_MUTUAL;
-
-	conn->chap_group = target->chap_group;
-
-	return iscsi_connection_chap_negotiate( conn );
-}
-
-/**
- * @brief Negotiates connection header and data digest (CRC32C).
- *
- * This function updates the key and value pairs if, and only if
- * header and data digests are enabled in the target node.
- *
- * @param[in] conn Pointer to iSCSI connection to update the key
- * and value pairs for. May NOT be NULL, so be careful.
- * @param[in] target Pointer to iSCSI target node used to check
- * the digest status. NULL is not allowed here, so take
- * caution.
- * @return 0 on successful update, a negative error code otherwise.
- */
-static int iscsi_connection_login_digest_negotiate(iscsi_connection *conn, const iscsi_target_node *target)
-{
-	int rc = 0;
-
-	if ( target->header_digest != 0 )
-		rc = iscsi_update_key_value_pair( conn->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_HEADER_DIGEST, (uint8_t *) "CRC32C" );
-
-	if ( target->data_digest != 0 )
-		rc = iscsi_update_key_value_pair( conn->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DATA_DIGEST, (uint8_t *) "CRC32C" );
-
-	return rc;
-}
-
-/**
- * @brief Determines iSCSI session login steps for normal authentication.
- *
- * This function also does related validation checks.
- *
- * @param[in] conn Pointer to iSCSI connection, may NOT be
- * NULL, so take caution.
- * @param[in] login_response_pdu Pointer to login response PDU where
- * NULL is not allowed, so be careful.
- * @param[in] key_value_pairs Pointer to hash map containing the login
- * request key and value pairs and may NOT be NULL, so
- * take caution.
- * @param[in] init_port_name Pointer to iSCSI initiator port name. NULL
- * is NOT an allowed value, so be careful.
- * @param[in] cid Connection ID (CID).
- * @return 0 on successful operation, a negative error code
- * otherwise.
- */
-static int iscsi_connection_login_session_normal(iscsi_connection *conn, iscsi_pdu *login_response_pdu, iscsi_hashmap *key_value_pairs, uint8_t *init_port_name, const uint cid)
-{
-	iscsi_target_node *target = NULL;
-	uint8_t *target_name;
-	iscsi_login_response_packet *login_response_pkt = (iscsi_login_response_packet *) login_response_pdu->bhs_pkt;
-	int rc = iscsi_get_key_value_pair( key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_NAME, &target_name );
-
-	if ( (rc < 0) || (target_name == NULL) ) {
-		login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
-		login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_MISSING_PARAMETER;
-
-		return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
-	}
-
-	const uint8_t *target_name_short = (uint8_t *) strstr( (char *) target_name, ":" );
-
-	conn->target_name_short = iscsi_sprintf_alloc( "%s", ((target_name_short != NULL) ? ++target_name_short : target_name) );
-
-	if ( conn->target_name_short == NULL ) {
-		login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_SERVER_ERR;
-		login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_SERVER_ERR_OUT_OF_RESOURCES;
-
-		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-	}
-
-	rc = iscsi_connection_login_check_target( conn, login_response_pdu, target_name, &target );
-
-	if ( rc < 0 )
-		return rc;
-
-	conn->device      = target->device;
-	conn->target      = target;
-	conn->target_port = iscsi_device_find_port_by_portal_group_tag( target->device, conn->pg_tag );
-
-	rc = iscsi_connection_login_check_session( conn, login_response_pdu, init_port_name, cid );
-
-	if ( rc < 0 )
-		return rc;
-
-	rc = iscsi_connection_login_chap_negotiate( conn, target );
-
-	if ( rc == 0 )
-		rc = iscsi_connection_login_digest_negotiate( conn, target );
-
-	if (rc != 0) {
-		login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
-		login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_INVALID_LOGIN_REQ_TYPE;
+		task->scsi_task.buf = NULL;
+		task->scsi_task.pos = 0UL;
+		task->scsi_task.len = task->scsi_task.xfer_len;
 	}
+	iscsi_scsi_lun_task_run( &task->scsi_task, pdu );
 
-	return rc;
+	return ISCSI_CONNECT_PDU_READ_OK;
 }
 
 /*
@@ -12733,174 +3621,26 @@ static int iscsi_connection_login_session_normal(iscsi_connection *conn, iscsi_p
  * 0: success
  * otherwise: error
  */
-static int iscsi_connection_login_set_info(iscsi_connection *conn, iscsi_pdu *login_response_pdu, const uint8_t *init_port_name, const int type, const uint cid)
+static int iscsi_connection_login_set_info(iscsi_connection *conn, iscsi_pdu *login_response_pdu,  const int type, const uint cid)
 {
 	conn->flags          &= ~ISCSI_CONNECT_FLAGS_AUTH;
-	conn->auth_chap.phase = ISCSI_AUTH_CHAP_PHASE_WAIT_A;
 	conn->cid             = (uint16_t) cid;
 
 	if ( conn->session == NULL ) {
 		iscsi_login_response_packet *login_response_pkt = (iscsi_login_response_packet *) login_response_pdu->bhs_pkt;
-		iscsi_target_node *target = conn->target;
-		const uint64_t isid = iscsi_connection_get_isid( &login_response_pkt->isid );
-		iscsi_port *init_port = iscsi_port_create( init_port_name, isid, 0U );
-
-		if ( init_port == NULL ) {
-			login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_SERVER_ERR;
-			login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_SERVER_ERR_OUT_OF_RESOURCES;
-
-			return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
-		}
-
-		conn->session = iscsi_session_create( conn, target, type );
+		conn->session = iscsi_session_create( conn, type );
 
 		if ( conn->session == NULL ) {
-			iscsi_port_destroy( init_port );
-
 			login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_SERVER_ERR;
 			login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_SERVER_ERR_OUT_OF_RESOURCES;
 
 			return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
 		}
 
-		conn->session->init_port = init_port;
 		conn->stat_sn            = iscsi_get_be32(login_response_pkt->stat_sn);
-		conn->session->isid      = isid;
-
-		pthread_rwlock_wrlock( &iscsi_globvec->sessions_rwlock );
-		iscsi_hashmap_key_create_id( iscsi_globvec->sessions, &conn->session->tsih );
-
-		int rc = iscsi_hashmap_put( iscsi_globvec->sessions, (uint8_t *) &conn->session->tsih, sizeof(conn->session->tsih), (uint8_t *) conn->session );
-
-		pthread_rwlock_unlock( &iscsi_globvec->sessions_rwlock );
-
-		if ( rc < 0 ) {
-			iscsi_session_destroy( conn->session );
-			conn->session = NULL;
-
-			iscsi_port_destroy( init_port );
-
-			return rc;
-		}
 
-		rc = iscsi_port_transport_id_set( conn->session->init_port, conn->init_name, isid );
-
-		if ( rc < 0 ) {
-			iscsi_session_destroy( conn->session );
-			conn->session = NULL;
-
-			iscsi_port_destroy( init_port );
-
-			return rc;
-		}
-
-		conn->session->queue_depth = ((target != NULL) ? target->queue_depth : 1U);
 		conn->session->exp_cmd_sn  = login_response_pdu->cmd_sn;
-		conn->session->max_cmd_sn  = (uint32_t) (login_response_pdu->cmd_sn + (uint32_t) conn->session->queue_depth - 1UL);
-	}
-
-	conn->init_port = conn->session->init_port;
-
-	return ISCSI_CONNECT_PDU_READ_OK;
-}
-
-/**
- * @brief Sets iSCSI session target info key and value pairs.
- *
- * This function also sets the login response PDU
- * key and value pairs.
- *
- * @param[in] conn Pointer to iSCSI connection of which
- * the target info should be set, may NOT be NULL,
- * so take caution.
- * @param[in] login_response_pdu Pointer to login response PDU and
- * NULL is not allowed here, so be careful.
- * @param[in] type iSCSI session type.
- * @return 0 on successfully setting target info, a
- * negative error code otherwise.
- */
-static int iscsi_connection_login_set_target_info(iscsi_connection *conn, iscsi_pdu *login_response_pdu, const int type)
-{
-	iscsi_target_node *target = conn->target;
-	int rc;
-
-	if ( target != NULL ) {
-		rc = iscsi_update_key_value_pair( conn->session->key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_ALIAS, ((target->alias != NULL) ? target->alias : (uint8_t *) "") );
-
-		if ( rc < 0 )
-			return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_PARAMETER;
-	}
-
-	uint8_t *tmp_buf = iscsi_sprintf_alloc( "%s:%s,%" PRIu64, conn->portal_host, conn->portal_port, conn->pg_tag );
-
-	if ( tmp_buf == NULL )
-		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-
-	rc = iscsi_update_key_value_pair( conn->session->key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_ADDRESS, tmp_buf );
-
-	free( tmp_buf );
-
-	if ( rc < 0 )
-		return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_PARAMETER;
-
-	rc = iscsi_update_int_key_value_pair( conn->session->key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_PORTAL_GROUP_TAG, (int32_t) conn->pg_tag );
-
-	if ( rc < 0 )
-		return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_PARAMETER;
-
-	if ( target != NULL ) {
-		rc = iscsi_get_key_value_pair( conn->session->key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_ALIAS, &tmp_buf );
-
-		if ( (rc == 0) && (strlen( (char *) tmp_buf ) != 0) ) {
-			iscsi_key_value_pair *key_value_pair;
-			rc = iscsi_hashmap_get( iscsi_globvec->session_key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_ALIAS, strlen( (char *) ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_ALIAS ) + 1, (uint8_t **) &key_value_pair);
-
-			if ( rc < 0 )
-				return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-
-			const int32_t ds_len = iscsi_append_key_value_pair_packet( key_value_pair, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_ALIAS, tmp_buf, (uint8_t *) login_response_pdu->ds_cmd_data, login_response_pdu->ds_len, login_response_pdu->len );
-
-			if ( ds_len < 0L )
-				return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-
-			login_response_pdu->len = ds_len;
-		}
-
-		if ( type == ISCSI_SESSION_TYPE_DISCOVERY ) {
-			rc = iscsi_get_key_value_pair( conn->session->key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_ADDRESS, &tmp_buf );
-
-			if ( (rc == 0) && (strlen( (char *) tmp_buf ) != 0) ) {
-				iscsi_key_value_pair *key_value_pair;
-				rc = iscsi_hashmap_get( iscsi_globvec->session_key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_ADDRESS, strlen( (char *) ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_ADDRESS ) + 1, (uint8_t **) &key_value_pair);
-
-				if ( rc < 0 )
-					return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-
-				const int32_t ds_len = iscsi_append_key_value_pair_packet( key_value_pair, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_ADDRESS, tmp_buf, (uint8_t *) login_response_pdu->ds_cmd_data, login_response_pdu->ds_len, login_response_pdu->len );
-
-				if ( ds_len < 0L )
-					return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-
-				login_response_pdu->ds_len = ds_len;
-			}
-		}
-
-		rc = iscsi_get_key_value_pair( conn->session->key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_PORTAL_GROUP_TAG, &tmp_buf );
-
-		if ( rc == 0 ) {
-			iscsi_key_value_pair *key_value_pair;
-			rc = iscsi_hashmap_get( iscsi_globvec->session_key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_PORTAL_GROUP_TAG, strlen( (char *) ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_PORTAL_GROUP_TAG ) + 1, (uint8_t **) &key_value_pair);
-
-			if ( rc < 0 )
-				return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-
-			const int32_t ds_len = iscsi_append_key_value_pair_packet( key_value_pair, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_PORTAL_GROUP_TAG, tmp_buf, (uint8_t *) login_response_pdu->ds_cmd_data, login_response_pdu->ds_len, login_response_pdu->len );
-
-			if ( ds_len < 0L )
-				return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-
-			login_response_pdu->ds_len = ds_len;
-		}
+		conn->session->max_cmd_sn  = (uint32_t) (login_response_pdu->cmd_sn + ISCSI_DEFAULT_QUEUE_DEPTH - 1UL);
 	}
 
 	return ISCSI_CONNECT_PDU_READ_OK;
@@ -12916,218 +3656,135 @@ static int iscsi_connection_login_set_target_info(iscsi_connection *conn, iscsi_
  * may NOT be NULL, so be careful.
  * @param[in] login_response_pdu Pointer to login response PDU.
  * NULL is not allowed here, so take caution.
- * @param[in] key_value_pairs Pointer to key and value pairs.
+ * @param[in] kvpairs Pointer to key and value pairs.
  * which may NOT be NULL, so take caution.
  * @param[in] cid Connection ID (CID).
  * @return 0 on success, a negative error code otherwise.
  */
-static int iscsi_connection_handle_login_phase_none(iscsi_connection *conn, iscsi_pdu *login_response_pdu, iscsi_hashmap *key_value_pairs, uint cid)
+static int iscsi_connection_handle_login_phase_none(iscsi_connection *conn, iscsi_pdu *login_response_pdu, iscsi_negotiation_kvp *kvpairs, uint cid)
 {
-	uint8_t *init_port_name = NULL;
+	int type, rc;
 	iscsi_login_response_packet *login_response_pkt = (iscsi_login_response_packet *) login_response_pdu->bhs_pkt;
 
-	conn->device = NULL;
-	conn->target = NULL;
-
-	int rc = iscsi_connection_login_init_port( conn, login_response_pdu, key_value_pairs, &init_port_name );
-
-	if ( rc < 0 ) {
-		if ( init_port_name != NULL )
-			free( init_port_name );
-
-		return rc;
-	}
-
-	int type;
-
-	rc = iscsi_connection_login_session_type( login_response_pdu, key_value_pairs, &type );
-
-	if ( rc < 0 ) {
-		free( init_port_name );
+	rc = iscsi_login_parse_session_type( login_response_pdu, kvpairs->SessionType, &type );
 
+	if ( rc < 0 )
 		return rc;
-	}
 
-	if ( type == ISCSI_SESSION_TYPE_NORMAL ) {
-		rc = iscsi_connection_login_session_normal( conn, login_response_pdu, key_value_pairs, init_port_name, cid );
-	} else if ( type == ISCSI_SESSION_TYPE_DISCOVERY ) {
-		login_response_pkt->tsih = 0U;
-
-		rc = iscsi_connection_login_session_chap_discovery( conn );
+	if ( kvpairs->TargetName != NULL && type == ISCSI_SESSION_TYPE_NORMAL ) {
+		rc = iscsi_image_from_target( conn, login_response_pdu, kvpairs->TargetName );
 	} else {
 		login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
 		login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_MISSING_PARAMETER;
 
-		rc = ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
-	}
-
-	if ( rc < 0 ) {
-		free( init_port_name );
-
-		return rc;
+		return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
 	}
 
-	rc = iscsi_connection_login_set_info( conn, login_response_pdu, init_port_name, type, cid );
-
-	free( init_port_name );
-
 	if ( rc < 0 )
 		return rc;
 
-	if ( type == ISCSI_SESSION_TYPE_DISCOVERY ) {
-		conn->session->max_conns = 1UL;
-
-		rc = iscsi_add_int_key_value_pair( conn->session->key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_CONNECTIONS, conn->session->max_conns );
-
-		if ( rc < 0 )
-			return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_PARAMETER;
+	return iscsi_connection_login_set_info( conn, login_response_pdu, type, cid );
+}
+
+static int iscsi_write_login_options_to_pdu( iscsi_connection *conn, iscsi_negotiation_kvp *pairs, iscsi_pdu *response_pdu )
+{
+	uint payload_len = response_pdu->ds_write_pos;
+
+#	define ADD_KV_INTERNAL(num, key, value) do { \
+int rc = iscsi_append_key_value_pair_packet( num, key, value, (char *)response_pdu->ds_cmd_data, payload_len, response_pdu->ds_len ); \
+if ( rc < 0 ) return -1; \
+payload_len += rc; \
+} while (0)
+#	define ADD_KV_OPTION_INT(key) do { \
+if ( pairs->key != -1 ) ADD_KV_INTERNAL( true, #key, (const char *)(size_t)conn->session->opts.key ); \
+} while (0)
+#	define ADD_KV_OPTION_STR(key) do { \
+if ( pairs->key != NULL ) ADD_KV_INTERNAL( false, #key, conn->session->opts.key ); \
+} while (0)
+#	define ADD_KV_PLAIN_INT(key, value) do { \
+if ( pairs->key != -1 ) ADD_KV_INTERNAL( true, #key, (const char *)(size_t)(value) ); \
+} while (0)
+#	define ADD_KV_PLAIN_STR(key, value) do { \
+if ( pairs->key != NULL ) ADD_KV_INTERNAL( false, #key, value ); \
+} while (0)
+	ADD_KV_OPTION_INT( MaxRecvDataSegmentLength );
+	ADD_KV_OPTION_INT( MaxBurstLength );
+	ADD_KV_OPTION_INT( FirstBurstLength );
+	ADD_KV_PLAIN_INT( MaxConnections, 1 );
+	ADD_KV_PLAIN_INT( ErrorRecoveryLevel, 0 );
+	ADD_KV_PLAIN_STR( HeaderDigest, "None" );
+	ADD_KV_PLAIN_STR( DataDigest, "None" );
+#	undef ADD_KV_PLAIN
+#	undef ADD_KV_OPTION_INT
+#	undef ADD_KV_OPTION_STR
+
+	if ( payload_len <= response_pdu->ds_len ) {
+		response_pdu->ds_write_pos = payload_len;
+	} else {
+		response_pdu->ds_write_pos = response_pdu->ds_len;
 	}
-
-	return iscsi_connection_login_set_target_info( conn, login_response_pdu, type );
+	return (int)payload_len;
 }
 
 /**
- * @brief Handles the Current Stage (CSG) bit of login response.
+ * @brief Handles iSCSI connection login response.
  *
- * This function determines the authentication method
- * and processes the various authentication stages.
+ * This function negotiates the login parameters
+ * and determines the authentication method.
  *
- * @param[in] conn Pointer to iSCSI connection, may NOT be
- * NULL, so take caution.
+ * @param[in] conn Pointer to iSCSI connection,
+ * may NOT be NULL, so be careful.
  * @param[in] login_response_pdu Pointer to login response PDU.
- * NULL is NOT an allowed value here, so be careful.
- * @param[in] key_value_pairs Pointer to key and value pairs to
- * retrieve authentication details from. This
- * is NOT allowed to be NULL. Be careful!
- * @return 0 if authentication has been handled successfully,
- * a negative error code otherwise.
+ * NULL is not allowed here, so take caution.
+ * @return 0 on success, a negative error code otherwise.
  */
-static int iscsi_connecction_handle_login_response_csg_bit(iscsi_connection *conn, iscsi_pdu *login_response_pdu, iscsi_hashmap *key_value_pairs)
+static int iscsi_connecction_handle_login_response(iscsi_connection *conn, iscsi_pdu *login_response_pdu,  iscsi_negotiation_kvp *pairs)
 {
 	iscsi_login_response_packet *login_response_pkt = (iscsi_login_response_packet *) login_response_pdu->bhs_pkt;
+	iscsi_connection_update_key_value_pairs( conn, pairs );
+	int payload_len = iscsi_write_login_options_to_pdu( conn, pairs, login_response_pdu );
 
-	switch ( ISCSI_LOGIN_RESPONSE_FLAGS_GET_CURRENT_STAGE(login_response_pkt->flags) ) {
-		case ISCSI_LOGIN_RESPONSE_FLAGS_CURRENT_STAGE_SECURITY_NEGOTIATION : {
-			uint8_t *auth_method;
-			const int rc = iscsi_get_key_value_pair( key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD, (uint8_t **) &auth_method );
-
-			if ( rc < 0 ) {
-				login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
-				login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_MISSING_PARAMETER;
-
-				return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
-			}
-
-			if ( strcasecmp( (char *) auth_method, "None" ) == 0 ) {
-				conn->flags |= ISCSI_CONNECT_FLAGS_AUTH;
-			} else {
-				const int32_t ds_len = iscsi_connection_auth_key_value_pairs( conn, key_value_pairs, auth_method, (uint8_t *) login_response_pdu->ds_cmd_data, login_response_pdu->ds_len, login_response_pdu->len );
-
-				if ( ds_len < 0L ) {
-					login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
-					login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_AUTH_ERR;
-
-					return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
-				}
-
-				login_response_pdu->ds_len = ds_len;
-
-				if ( (conn->flags & ISCSI_CONNECT_FLAGS_AUTH) == 0 )
-					login_response_pkt->flags &= (int8_t) ~ISCSI_LOGIN_RESPONSE_FLAGS_TRANSIT;
-			}
-
-			break;
-		}
-		case ISCSI_LOGIN_RESPONSE_FLAGS_CURRENT_STAGE_LOGIN_OPERATIONAL_NEGOTIATION : {
-			if ( conn->state == ISCSI_CONNECT_STATE_INVALID ) {
-				if ( conn->flags & ISCSI_CONNECT_FLAGS_CHAP_REQUIRE ) {
-					login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
-					login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_AUTH_ERR;
-
-					return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
-				} else {
-					conn->flags |= ISCSI_CONNECT_FLAGS_AUTH;
-				}
-			}
-
-			if ( (conn->flags & ISCSI_CONNECT_FLAGS_AUTH) == 0 ) {
-				login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
-				login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_AUTH_ERR;
+	if ( payload_len < 0 || payload_len > login_response_pdu->ds_len ) {
+		login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_SERVER_ERR;
+		login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_SERVER_ERR_OUT_OF_RESOURCES;
 
-				return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
-			}
+		return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
+	}
 
-			break;
-		}
-		case ISCSI_LOGIN_RESPONSE_FLAGS_CURRENT_STAGE_FULL_FEATURE_PHASE : {
+	// Handle current stage (CSG bits)
+	switch ( ISCSI_LOGIN_RESPONSE_FLAGS_GET_CURRENT_STAGE(login_response_pkt->flags) ) {
+	case ISCSI_LOGIN_RESPONSE_FLAGS_CURRENT_STAGE_SECURITY_NEGOTIATION : {
+		if ( pairs->AuthMethod != NULL && strcasecmp( pairs->AuthMethod, "None" ) == 0 ) {
+			conn->flags |= ISCSI_CONNECT_FLAGS_AUTH;
+		} else {
+			// Only "None" supported
 			login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
-			login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_MISC;
+			login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_AUTH_ERR;
 
 			return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
-
-			break;
 		}
-		default : {
-			login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
-			login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_MISC;
 
-			return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
-
-			break;
-		}
+		break;
 	}
+	case ISCSI_LOGIN_RESPONSE_FLAGS_CURRENT_STAGE_LOGIN_OPERATIONAL_NEGOTIATION : {
+		if ( conn->state == ISCSI_CONNECT_STATE_INVALID ) {
+			conn->flags |= ISCSI_CONNECT_FLAGS_AUTH;
+		}
 
-	return ISCSI_CONNECT_PDU_READ_OK;
-}
-
-/**
- *
- * @brief Checks whether the session type is valid.
- *
- * This function also can be used to output
- * debugging info about the session, which
- * is currently not implemented.
- *
- * @param[in] conn Pointer to iSCSI connection to be checked for
- * validity. May NOT be NULL, so be careful.
- * @param[in] login_response_pdu Pointer to login response PDU to
- * set status class and detail in case of an error.
- * NULL is not an allowed value here, take caution.
- * @return 0 if the session type is valid, a negative error code
- * otherwise.
- */
-static int iscsi_connection_login_session_info_notify(iscsi_connection *conn, iscsi_pdu *login_response_pdu)
-{
-	if ( (conn->session->type != ISCSI_SESSION_TYPE_NORMAL) && (conn->session->type != ISCSI_SESSION_TYPE_DISCOVERY) ) {
-		iscsi_login_response_packet *login_response_pkt = (iscsi_login_response_packet *) login_response_pdu->bhs_pkt;
-
+		break;
+	}
+	case ISCSI_LOGIN_RESPONSE_FLAGS_CURRENT_STAGE_FULL_FEATURE_PHASE :
+	default : {
 		login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
 		login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_MISC;
 
 		return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
 	}
+	}
 
-	return ISCSI_CONNECT_PDU_READ_OK;
-}
-
-/**
- * @brief Handles the Transit (T) bit of login response.
- *
- * This function handles the transitional stages
- * of the authentication process.
- *
- * @param[in] conn Pointer to iSCSI connection, may NOT be
- * NULL, so take caution.
- * @param[in] login_response_pdu Pointer to login response PDU.
- * NULL is NOT an allowed value here, so be careful.
- * @return 0 if transition has been handled successfully,
- * a negative error code otherwise.
- */
-static int iscsi_connecction_handle_login_response_t_bit(iscsi_connection *conn, iscsi_pdu *login_response_pdu)
-{
-	iscsi_login_response_packet *login_response_pkt = (iscsi_login_response_packet *) login_response_pdu->bhs_pkt;
-
-	switch ( ISCSI_LOGIN_RESPONSE_FLAGS_GET_NEXT_STAGE(login_response_pkt->flags) ) {
+	if ( (login_response_pkt->flags & ISCSI_LOGIN_RESPONSE_FLAGS_TRANSIT) != 0 ) {
+		// Client set the transition bit - requests to move on to next stage
+		switch ( ISCSI_LOGIN_RESPONSE_FLAGS_GET_NEXT_STAGE(login_response_pkt->flags) ) {
 		case ISCSI_LOGIN_RESPONSE_FLAGS_NEXT_STAGE_SECURITY_NEGOTIATION : {
 			conn->login_phase = ISCSI_LOGIN_RESPONSE_FLAGS_NEXT_STAGE_SECURITY_NEGOTIATION;
 
@@ -13143,10 +3800,15 @@ static int iscsi_connecction_handle_login_response_t_bit(iscsi_connection *conn,
 
 			iscsi_put_be16( (uint8_t *) &login_response_pkt->tsih, (uint16_t) conn->session->tsih );
 
-			const int rc = iscsi_connection_login_session_info_notify( conn, login_response_pdu );
+			if ( (conn->session->type != ISCSI_SESSION_TYPE_NORMAL) && (conn->session->type != ISCSI_SESSION_TYPE_DISCOVERY) ) {
+				logadd( LOG_DEBUG1, "Unsupported session type %d, rejecting", conn->session->type );
+				iscsi_login_response_packet *login_response_pkt = (iscsi_login_response_packet *) login_response_pdu->bhs_pkt;
 
-			if ( rc < 0 )
-				return rc;
+				login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
+				login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_MISC;
+
+				return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
+			}
 
 			conn->flags |= ISCSI_CONNECT_FLAGS_FULL_FEATURE;
 
@@ -13157,8 +3819,7 @@ static int iscsi_connecction_handle_login_response_t_bit(iscsi_connection *conn,
 			login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_MISC;
 
 			return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
-
-			break;
+		}
 		}
 	}
 
@@ -13166,45 +3827,6 @@ static int iscsi_connecction_handle_login_response_t_bit(iscsi_connection *conn,
 }
 
 /**
- * @brief Handles iSCSI connection login response.
- *
- * This function negotiates the login parameters
- * and determines the authentication method.
- *
- * @param[in] conn Pointer to iSCSI connection,
- * may NOT be NULL, so be careful.
- * @param[in] login_response_pdu Pointer to login response PDU.
- * NULL is not allowed here, so take caution.
- * @param[in] key_value_pairs Pointer to key and value pairs.
- * which may NOT be NULL, so take caution.
- * @return 0 on success, a negative error code otherwise.
- */
-static int iscsi_connecction_handle_login_response(iscsi_connection *conn, iscsi_pdu *login_response_pdu, iscsi_hashmap *key_value_pairs)
-{
-	iscsi_login_response_packet *login_response_pkt = (iscsi_login_response_packet *) login_response_pdu->bhs_pkt;
-	const int32_t ds_len = iscsi_negotiate_key_value_pairs( conn, key_value_pairs, (uint8_t *) login_response_pdu->ds_cmd_data, login_response_pdu->ds_len, login_response_pdu->len );
-
-	if ( ds_len < 0L ) {
-		login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
-		login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_AUTH_ERR;
-
-		return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
-	}
-
-	login_response_pdu->ds_len = (uint32_t) ds_len;
-
-	int rc = iscsi_connecction_handle_login_response_csg_bit( conn, login_response_pdu, key_value_pairs );
-
-	if ( rc < 0 )
-		return rc;
-
-	if ( (login_response_pkt->flags & ISCSI_LOGIN_RESPONSE_FLAGS_TRANSIT) != 0 )
-		rc = iscsi_connecction_handle_login_response_t_bit( conn, login_response_pdu );
-
-	return rc;
-}
-
-/**
  * @brief Handles an incoming iSCSI payload data login request PDU.
  *
  * This function handles login request payload
@@ -13221,69 +3843,48 @@ static int iscsi_connecction_handle_login_response(iscsi_connection *conn, iscsi
  */
 static int iscsi_connection_pdu_data_handle_login_req(iscsi_connection *conn, iscsi_pdu *pdu)
 {
+	int rc;
 	iscsi_pdu *login_response_pdu = (iscsi_pdu *) conn->login_response_pdu;
 
 	if ( login_response_pdu == NULL )
 		return ISCSI_CONNECT_PDU_READ_OK;
 
-	iscsi_hashmap *key_value_pairs = iscsi_hashmap_create( (((sizeof(iscsi_session_key_value_pair_lut) / sizeof(struct iscsi_key_value_pair_lut_entry)) - 1) + ((sizeof(iscsi_connection_key_value_pair_lut) / sizeof(struct iscsi_key_value_pair_lut_entry)) - 1)) );
-
-	if ( key_value_pairs == NULL )
-		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-
 	iscsi_login_req_packet *login_req_pkt = (iscsi_login_req_packet *) pdu->bhs_pkt;
 	uint cid = iscsi_get_be16(login_req_pkt->cid);
-	int rc = iscsi_connection_save_incoming_key_value_pairs( conn, key_value_pairs, login_response_pdu, pdu );
 
-	if ( rc < 0 ) {
-		iscsi_connection_pdu_login_response( conn, login_response_pdu, NULL, iscsi_connection_pdu_login_err_complete );
+	iscsi_negotiation_kvp pairs;
+	iscsi_login_response_packet *login_response_pkt = (iscsi_login_response_packet *) login_response_pdu->bhs_pkt;
+	rc = iscsi_parse_login_key_value_pairs( &pairs, (uint8_t *) pdu->ds_cmd_data, pdu->ds_len );
 
-		return ISCSI_CONNECT_PDU_READ_OK;
+	if ( rc < 0 || rc > login_response_pdu->ds_len ) {
+		login_response_pkt->status_class  = ISCSI_LOGIN_RESPONSE_STATUS_CLASS_CLIENT_ERR;
+		login_response_pkt->status_detail = ISCSI_LOGIN_RESPONSE_STATUS_DETAILS_CLIENT_ERR_AUTH_ERR;
+
+		return ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE;
 	}
 
 	if ( conn->state == ISCSI_CONNECT_STATE_INVALID ) {
-		rc = iscsi_connection_handle_login_phase_none( conn, login_response_pdu, key_value_pairs, cid );
+		rc = iscsi_connection_handle_login_phase_none( conn, login_response_pdu, &pairs, cid );
 
 		if ( (rc == ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE) || (rc == ISCSI_CONNECT_PDU_READ_ERR_LOGIN_PARAMETER) ) {
-			iscsi_connection_pdu_login_response( conn, login_response_pdu, key_value_pairs, iscsi_connection_pdu_login_err_complete );
+			iscsi_connection_pdu_login_response( conn, login_response_pdu );
 
 			return ISCSI_CONNECT_PDU_READ_OK;
 		}
 	}
 
-	rc = iscsi_connecction_handle_login_response( conn, login_response_pdu, key_value_pairs );
-
-	if ( rc == ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE ) {
-		iscsi_connection_pdu_login_response( conn, login_response_pdu, key_value_pairs, iscsi_connection_pdu_login_err_complete );
+	rc = iscsi_connecction_handle_login_response( conn, login_response_pdu, &pairs );
 
-		return ISCSI_CONNECT_PDU_READ_OK;
+	if ( rc == ISCSI_CONNECT_PDU_READ_OK ) {
+		conn->state = ISCSI_CONNECT_STATE_RUNNING;
 	}
 
-	conn->state = ISCSI_CONNECT_STATE_RUNNING;
-
-	iscsi_connection_pdu_login_response( conn, login_response_pdu, key_value_pairs, iscsi_connection_pdu_login_ok_complete );
+	iscsi_connection_pdu_login_response( conn, login_response_pdu );
 
 	return ISCSI_CONNECT_PDU_READ_OK;
 }
 
 /**
- * @brief Callback function after text response has been sent.
- *
- * This function is invoked after the text
- * response has been sent to the client via
- * TCP/IP.
- *
- * @param[in] user_data Pointer to iSCSI connection which
- * was used for sending the response.
- */
-static void iscsi_connection_pdu_text_complete(uint8_t *user_data)
-{
-	iscsi_connection *conn = (iscsi_connection *) user_data;
-
-	iscsi_connection_update_key_value_pairs( conn );
-}
-
-/**
  * @brief Handles an incoming iSCSI payload data text request PDU.
  *
  * This function handles text request payload
@@ -13300,132 +3901,40 @@ static void iscsi_connection_pdu_text_complete(uint8_t *user_data)
  */
 static int iscsi_connection_pdu_data_handle_text_req(iscsi_connection *conn, iscsi_pdu *pdu)
 {
-	iscsi_hashmap *key_value_pairs = iscsi_hashmap_create( (((sizeof(iscsi_session_key_value_pair_lut) / sizeof(struct iscsi_key_value_pair_lut_entry)) - 1) + ((sizeof(iscsi_connection_key_value_pair_lut) / sizeof(struct iscsi_key_value_pair_lut_entry)) - 1)) );
-
-	if ( key_value_pairs == NULL )
-		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-
 	iscsi_text_req_packet *text_req_pkt = (iscsi_text_req_packet *) pdu->bhs_pkt;
-	int rc = iscsi_parse_key_value_pairs( key_value_pairs, (uint8_t *) pdu->ds_cmd_data, pdu->ds_len, ((text_req_pkt->flags & ISCSI_TEXT_REQ_FLAGS_CONTINUE) != 0), &conn->text_partial_pairs );
+	iscsi_negotiation_kvp pairs;
+	int rc = iscsi_parse_login_key_value_pairs( &pairs, (uint8_t *) pdu->ds_cmd_data, pdu->ds_len );
 
 	if ( rc < 0 ) {
-		iscsi_hashmap_iterate( key_value_pairs, iscsi_hashmap_key_destroy_value_callback, NULL );
-		iscsi_hashmap_destroy( key_value_pairs );
-
 		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
 	}
 
-	if ( (pdu->ds_len == 0UL) && (iscsi_hashmap_size( key_value_pairs ) == 0U) ) {
-		iscsi_hashmap *tmp_hashmap = key_value_pairs;
-		key_value_pairs            = conn->text_key_value_pairs;
-		conn->text_key_value_pairs = tmp_hashmap;
-	}
-
-	iscsi_pdu *response_pdu = iscsi_connection_pdu_create( conn, 0U, conn->header_digest, conn->max_recv_ds_len, conn->data_digest );
+	iscsi_pdu *response_pdu = iscsi_connection_pdu_create( conn, 8192 );
 
 	if ( response_pdu == NULL ) {
 		logadd( LOG_ERROR, "iscsi_connection_pdu_data_handle_text_req: Out of memory while allocating iSCSI text response PDU" );
 
-		iscsi_hashmap_iterate( key_value_pairs, iscsi_hashmap_key_destroy_value_callback, NULL );
-		iscsi_hashmap_destroy( key_value_pairs );
-
 		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
 	}
 
-	response_pdu->ds_len = 0UL;
+	iscsi_connection_update_key_value_pairs( conn, &pairs );
 
-	int32_t ds_len = iscsi_negotiate_key_value_pairs( conn, key_value_pairs, (uint8_t *) response_pdu->ds_cmd_data, response_pdu->ds_len, response_pdu->len );
+	int payload_len = iscsi_write_login_options_to_pdu( conn, &pairs, response_pdu );
 
-	if ( ds_len < 0L ) {
-		iscsi_hashmap_iterate( key_value_pairs, iscsi_hashmap_key_destroy_value_callback, NULL );
-		iscsi_hashmap_destroy( key_value_pairs );
+	if ( payload_len < 0 || payload_len > response_pdu->ds_len ) {
 		iscsi_connection_pdu_destroy( response_pdu );
 
 		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
 	}
 
-	iscsi_text_response_packet *text_response_pkt = (iscsi_text_response_packet *) response_pdu->bhs_pkt;
+	iscsi_text_response_packet *text_response_pkt = (iscsi_text_response_packet *) iscsi_connection_pdu_resize( response_pdu, 0, response_pdu->ds_write_pos );
 
 	text_response_pkt->opcode = ISCSI_OPCODE_SERVER_TEXT_RES;
-	text_response_pkt->flags  = 0;
-
-	if ( (text_req_pkt->flags & ISCSI_TEXT_REQ_FLAGS_CONTINUE) != 0 )
-		text_response_pkt->flags |= (int8_t) ISCSI_TEXT_RESPONSE_FLAGS_CONTINUE;
+	text_response_pkt->flags  = (int8_t) ISCSI_TEXT_RESPONSE_FLAGS_FINAL;
 
-	if ( (text_req_pkt->flags & ISCSI_TEXT_REQ_FLAGS_FINAL) != 0 )
-		text_response_pkt->flags |= (int8_t) ISCSI_TEXT_RESPONSE_FLAGS_FINAL;
-
-	text_req_pkt->reserved = 0U;
-
-	uint8_t *send_targets_val;
-	rc = iscsi_get_key_value_pair( key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_SEND_TARGETS, &send_targets_val );
-
-	if ( rc < 0 ) {
-		uint8_t *type_val;
-		rc = iscsi_get_key_value_pair( conn->session->key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_SESSION_TYPE, &type_val );
+	text_response_pkt->reserved = 0;
 
-		if ( (rc >= 0) && (type_val != NULL) && (strcasecmp( (char *) type_val, "Discovery" ) == 0) ) {
-			iscsi_hashmap_iterate( key_value_pairs, iscsi_hashmap_key_destroy_value_callback, NULL );
-			iscsi_hashmap_destroy( key_value_pairs );
-			iscsi_connection_pdu_destroy( response_pdu );
-
-			return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-		}
-	} else {
-		uint8_t *type_val;
-		rc = iscsi_get_key_value_pair( conn->session->key_value_pairs, ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_SESSION_TYPE, &type_val );
-
-		if ( (rc >= 0) && (type_val != NULL) && (strcasecmp( (char *) type_val, "Discovery" ) == 0) ) {
-			if ( send_targets_val[0] == '\0' )
-				send_targets_val = (uint8_t *) "ALL";
-
-			ds_len = iscsi_target_node_send( conn, send_targets_val, conn->init_name, (uint8_t *) response_pdu->ds_cmd_data, ds_len, response_pdu->len );
-		} else {
-			if ( send_targets_val[0] == '\0' )
-				send_targets_val = conn->target_port->name;
-
-			if ( strcasecmp( (char *) send_targets_val, "ALL" ) == 0 ) {
-				iscsi_key_value_pair *key_value_pair;
-				rc = iscsi_hashmap_get( iscsi_globvec->session_key_value_pairs, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_SEND_TARGETS, strlen( (char *) ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_SEND_TARGETS ) + 1, (uint8_t **) &key_value_pair);
-
-				if ( rc < 0 ) {
-					iscsi_hashmap_iterate( key_value_pairs, iscsi_hashmap_key_destroy_value_callback, NULL );
-					iscsi_hashmap_destroy( key_value_pairs );
-					iscsi_connection_pdu_destroy( response_pdu );
-
-					return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-				}
-
-				ds_len = iscsi_append_key_value_pair_packet( key_value_pair, ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_SEND_TARGETS, (uint8_t *) "Reject", (uint8_t *) response_pdu->ds_cmd_data, ds_len, response_pdu->len );
-			} else {
-				ds_len = iscsi_target_node_send( conn, send_targets_val, conn->init_name, (uint8_t *) response_pdu->ds_cmd_data, ds_len, response_pdu->len );
-			}
-		}
-
-		if ( conn->target_send_total_size == 0U ) {
-			text_response_pkt->flags |= (int8_t) ISCSI_TEXT_RESPONSE_FLAGS_CONTINUE;
-			text_response_pkt->flags &= (int8_t) ~ISCSI_TEXT_RESPONSE_FLAGS_FINAL;
-		}
-	}
-
-	if ( ds_len < 0L ) {
-		iscsi_hashmap_iterate( key_value_pairs, iscsi_hashmap_key_destroy_value_callback, NULL );
-		iscsi_hashmap_destroy( key_value_pairs );
-		iscsi_connection_pdu_destroy( response_pdu );
-
-		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-	}
-
-	if ( conn->target_send_total_size == 0U ) {
-		iscsi_hashmap_iterate( key_value_pairs, iscsi_hashmap_key_destroy_value_callback, NULL );
-		iscsi_hashmap_destroy( key_value_pairs );
-	} else {
-		conn->text_key_value_pairs = key_value_pairs;
-	}
-
-	text_response_pkt = (iscsi_text_response_packet *) iscsi_connection_pdu_append( response_pdu, response_pdu->ahs_len, conn->header_digest, ds_len, conn->data_digest );
-
-	iscsi_put_be32( (uint8_t *) &text_response_pkt->total_ahs_len, ds_len ); // TotalAHSLength is always 0 and DataSegmentLength is 24-bit, so write in one step.
+	iscsi_put_be32( (uint8_t *) &text_response_pkt->total_ahs_len, payload_len ); // TotalAHSLength is always 0 and DataSegmentLength is 24-bit, so write in one step.
 	text_response_pkt->lun           = text_req_pkt->lun; // Copying over doesn't change endianess.
 	text_response_pkt->init_task_tag = text_req_pkt->init_task_tag; // Copying over doesn't change endianess.
 
@@ -13434,7 +3943,7 @@ static int iscsi_connection_pdu_data_handle_text_req(iscsi_connection *conn, isc
 
 		conn->session->current_text_init_task_tag = 0xFFFFFFFFUL;
 	} else {
-		iscsi_put_be32( (uint8_t *) &text_response_pkt->target_xfer_tag, ((uint32_t) conn->id + 1UL) );
+		iscsi_put_be32( (uint8_t *) &text_response_pkt->target_xfer_tag, (uint32_t) conn->id + 1UL );
 	}
 
 	iscsi_put_be32( (uint8_t *) &text_response_pkt->stat_sn, conn->stat_sn++ );
@@ -13447,34 +3956,12 @@ static int iscsi_connection_pdu_data_handle_text_req(iscsi_connection *conn, isc
 	text_response_pkt->reserved2[0] = 0ULL;
 	text_response_pkt->reserved2[1] = 0ULL;
 
-	iscsi_connection_pdu_write( conn, response_pdu, iscsi_connection_pdu_text_complete, (uint8_t *) conn );
+	iscsi_connection_pdu_write( conn, response_pdu );
 
 	return ISCSI_CONNECT_PDU_READ_OK;
 }
 
 /**
- * @brief Handles an incoming iSCSI payload data SCSI data out request PDU.
- *
- * This function handles SCSI data out request
- * payload data sent by the client.\n
- * If a response needs to be sent, this will
- * be done as well.
- *
- * @param[in] conn Pointer to iSCSI connection to handle. May
- * NOT be NULL, so take caution.
- * @param[in] pdu Pointer to iSCSI client request PDU to handle.
- * May be NULL in which case an error is returned.
- * @return 0 on success. A negative value indicates
- * an error. A positive value a warning.
- */
-static int iscsi_connection_pdu_data_handle_scsi_data_out(iscsi_connection *conn, iscsi_pdu *pdu)
-{
-	// TODO: Implement opcode.
-
-	return 0;
-}
-
-/**
  * @brief Handles an incoming iSCSI payload data PDU.
  *
  * This function handles all payload data sent
@@ -13516,11 +4003,6 @@ static int iscsi_connection_pdu_data_handle(iscsi_connection *conn, iscsi_pdu *p
 
 			break;
 		}
-		case ISCSI_OPCODE_CLIENT_SCSI_DATA_OUT : {
-			rc = iscsi_connection_pdu_data_handle_scsi_data_out( conn, pdu );
-
-			break;
-		}
 		case ISCSI_OPCODE_CLIENT_TASK_FUNC_REQ :
 		case ISCSI_OPCODE_CLIENT_LOGOUT_REQ :
 		case ISCSI_OPCODE_CLIENT_SNACK_REQ : {
@@ -13533,9 +4015,9 @@ static int iscsi_connection_pdu_data_handle(iscsi_connection *conn, iscsi_pdu *p
 		}
 	}
 
-	if ( rc < 0 )
-		logadd( LOG_ERROR, "Fatal error during payload handler (opcode 0x%02x) detected for device %s", (int) opcode, (conn->device != NULL ? (char *) conn->device->name : "(null)") );
-
+	if ( rc < 0 ) {
+		logadd( LOG_ERROR, "Fatal error during payload handler (opcode 0x%02x) detected for client %s", (int) opcode, conn->client->hostName );
+	}
 	return rc;
 }
 
@@ -13543,12 +4025,14 @@ static int iscsi_connection_pdu_data_handle(iscsi_connection *conn, iscsi_pdu *p
  * @brief Retrieves and merges splitted iSCSI PDU data read from TCP/IP socket.
  *
  * This function handles partial reads of data
- * packet.\n
- * Since iSCSI data can span multiple packets, not
- * only by TCP/IP itself, but also by iSCSI protocol
- * specifications, multiple calls are needed in order
- * to be sure that all data packets have been
- * received.
+ * packets.\n
+ * The function is guaranteed to read as many bytes as indicated by the
+ * PDU struct, unless the read timeout is reached, or the connection
+ * is closed/reset.\n
+ * Care is also taken for padding bytes that have to be read. It is
+ * assumed the according buffer will have enough space for the padding
+ * bytes, which is always guaranteed when using the create and resize
+ * helpers for allocating PDUs.
  *
  * @param[in] conn Pointer to iSCSI connection to read TCP/IP data from.
  * @param[in] pdu Pointer to iSCSI PDU to read TCP/IP data into.
@@ -13556,38 +4040,21 @@ static int iscsi_connection_pdu_data_handle(iscsi_connection *conn, iscsi_pdu *p
  * @retval 0 Read operation was successful and next read is ready.
  * @retval 1 Read operation was successful and PDU was fully processed.
  */
-int iscsi_connection_pdu_data_read(iscsi_connection *conn, iscsi_pdu *pdu)
+static int iscsi_connection_pdu_data_read(iscsi_connection *conn, iscsi_pdu *pdu)
 {
-	const uint32_t ds_len = pdu->ds_len;
+	const uint32_t ds_len = ISCSI_ALIGN( pdu->ds_len, ISCSI_ALIGN_SIZE );
 
-	if ( pdu->pos < ds_len ) {
-		const int32_t len = iscsi_connection_read( conn, (((uint8_t *) pdu->ds_cmd_data) + pdu->pos), (ds_len - pdu->pos) );
+	if ( pdu->recv_pos < ds_len ) {
+		const int32_t len = iscsi_connection_read( conn, (((uint8_t *) pdu->ds_cmd_data) + pdu->recv_pos), (ds_len - pdu->recv_pos) );
 
 		if ( len < 0L )
 			return len;
 
-		pdu->pos += len;
+		pdu->recv_pos += len;
 	}
 
-	if ( pdu->pos < ds_len )
-		return ISCSI_CONNECT_PDU_READ_PROCESSED;
-
-	if ( pdu->data_digest != NULL ) {
-		if ( (int) pdu->data_digest_pos < pdu->data_digest_size ) {
-			const int32_t len = iscsi_connection_read( conn, (((uint8_t *) pdu->data_digest) + pdu->data_digest_pos), (pdu->data_digest_size - pdu->data_digest_pos) );
-
-			if ( len < 0L )
-				return len;
-
-			pdu->data_digest_pos += len;
-
-			if ( (int) pdu->data_digest_pos < pdu->data_digest_size )
-				return ISCSI_CONNECT_PDU_READ_OK;
-		}
-
-		if  ( !iscsi_connection_pdu_digest_data_verify( pdu->data_digest, pdu->ds_cmd_data, ds_len ) )
-			return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
-	}
+	if ( pdu->recv_pos < ds_len )
+		return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
 
 	return ISCSI_CONNECT_PDU_READ_OK;
 }
@@ -13619,7 +4086,8 @@ static int iscsi_connection_pdu_read(iscsi_connection *conn)
 
 		switch ( conn->pdu_recv_state ) {
 			case ISCSI_CONNECT_PDU_RECV_STATE_WAIT_PDU_READY : {
-				conn->pdu_processing = iscsi_connection_pdu_create( conn, 0U, conn->header_digest, 0UL, conn->data_digest );
+				assert( conn->pdu_processing == NULL );
+				conn->pdu_processing = iscsi_connection_pdu_create( conn, 0UL );
 
 				if ( conn->pdu_processing == NULL )
 					return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
@@ -13629,116 +4097,62 @@ static int iscsi_connection_pdu_read(iscsi_connection *conn)
 				break;
 			}
 			case ISCSI_CONNECT_PDU_RECV_STATE_WAIT_PDU_HDR : {
-				if ( pdu->bhs_pos < sizeof(struct iscsi_bhs_packet) ) {
+				while ( pdu->bhs_pos < sizeof(struct iscsi_bhs_packet) ) {
 					const int32_t len = iscsi_connection_read( conn, (((uint8_t *) pdu->bhs_pkt) + pdu->bhs_pos), (sizeof(struct iscsi_bhs_packet) - pdu->bhs_pos) );
 
 					if ( len < 0L ) {
 						conn->pdu_recv_state = ISCSI_CONNECT_PDU_RECV_STATE_ERR;
 
-						break;
+						return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
 					}
 
 					pdu->bhs_pos += len;
-
-					if ( pdu->bhs_pos < sizeof(struct iscsi_bhs_packet) )
-						return ISCSI_CONNECT_PDU_READ_OK;
 				}
 
 				if ( (conn->flags & ISCSI_CONNECT_FLAGS_LOGGED_OUT) != 0 ) {
 					conn->pdu_recv_state = ISCSI_CONNECT_PDU_RECV_STATE_ERR;
 
-					break;
+					return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
 				}
 
 				iscsi_bhs_packet *bhs_pkt = pdu->bhs_pkt;
-				const uint ahs_len        = ((uint) bhs_pkt->total_ahs_len << 2U);
+				const uint ahs_len        = ((uint) bhs_pkt->total_ahs_len * 4);
 				const uint32_t ds_len     = iscsi_get_be24(bhs_pkt->ds_len);
 
-				bhs_pkt = iscsi_connection_pdu_append( pdu, ahs_len, conn->header_digest, ds_len, conn->data_digest );
+				bhs_pkt = iscsi_connection_pdu_resize( pdu, ahs_len, ds_len );
 
 				if ( bhs_pkt == NULL )
 					return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
 
-				uint64_t stat_opcode = (uint64_t) ISCSI_GET_OPCODE(bhs_pkt->opcode);
-				uint64_t *stat_value = NULL;
-				int stat_rc = iscsi_hashmap_get( conn->stat_iscsi_opcodes, (uint8_t *) &stat_opcode, sizeof(stat_opcode), (uint8_t **) &stat_value );
-
-				if ( stat_value == NULL ) {
-					stat_value = malloc( sizeof(uint64_t) );
-
-					if ( stat_value != NULL ) {
-						uint8_t *stat_key = iscsi_hashmap_key_create( (uint8_t *) &stat_opcode, sizeof(stat_opcode) );
-
-						if ( stat_key != NULL ) {
-							*stat_value = 0ULL;
-
-							stat_rc = iscsi_hashmap_put( conn->stat_iscsi_opcodes, stat_key, sizeof(stat_opcode), (uint8_t *) stat_value );
-
-							if ( stat_rc < 0 ) {
-								iscsi_hashmap_key_destroy( stat_key );
-								free( stat_value );
-								stat_value = NULL;
-							}
-						} else {
-							free( stat_value );
-							stat_value = NULL;
-						}
-					}
-				}
-
-				if ( stat_value != NULL )
-					(*stat_value)++;
-
-				if ( pdu->ahs_pos < ahs_len ) {
-					const int32_t len = iscsi_connection_read( conn, (((uint8_t *) pdu->ahs_pkt) + pdu->ahs_pos), (ahs_len - pdu->ahs_pos) );
+				int pos = 0;
+				while ( pos < ahs_len ) {
+					const int32_t len = iscsi_connection_read( conn, (((uint8_t *) pdu->ahs_pkt) + pos), (ahs_len - pos) );
 
 					if ( len < 0L ) {
 						conn->pdu_recv_state = ISCSI_CONNECT_PDU_RECV_STATE_ERR;
 
-						break;
+						return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
 					}
 
-					pdu->ahs_pos += len;
-
-					if ( pdu->ahs_pos < ahs_len )
-						return ISCSI_CONNECT_PDU_READ_OK;
-				}
-
-				if ( pdu->header_digest != NULL ) {
-					if ( (int) pdu->header_digest_pos < pdu->header_digest_size ) {
-						const int32_t len = iscsi_connection_read( conn, (((uint8_t *) pdu->header_digest) + pdu->header_digest_pos), (pdu->header_digest_size - pdu->header_digest_pos) );
-
-						if ( len < 0L ) {
-							conn->pdu_recv_state = ISCSI_CONNECT_PDU_RECV_STATE_ERR;
-
-							break;
-						}
-
-						pdu->header_digest_pos += len;
-
-						if ( (int) pdu->header_digest_pos < pdu->header_digest_size )
-							return ISCSI_CONNECT_PDU_READ_OK;
-					}
-
-					if  ( !iscsi_connection_pdu_digest_header_verify( pdu->header_digest, bhs_pkt, ahs_len ) ) {
-						conn->pdu_recv_state = ISCSI_CONNECT_PDU_RECV_STATE_ERR;
-
-						break;
-					}
+					pos += len;
 				}
 
-				conn->pdu_recv_state = ((iscsi_connection_pdu_header_handle( conn, pdu ) < 0) ? ISCSI_CONNECT_PDU_RECV_STATE_ERR : ISCSI_CONNECT_PDU_RECV_STATE_WAIT_PDU_DATA);
+				if ( iscsi_connection_pdu_header_handle( conn, pdu ) < 0 ) {
+					conn->pdu_recv_state = ISCSI_CONNECT_PDU_RECV_STATE_ERR;
+ 				} else {
+ 					conn->pdu_recv_state = ISCSI_CONNECT_PDU_RECV_STATE_WAIT_PDU_DATA;
+ 				}
 
 				break;
 			}
 			case ISCSI_CONNECT_PDU_RECV_STATE_WAIT_PDU_DATA : {
-				if ( pdu->ds_len != 0UL ) {
+				if ( pdu->ds_len != 0U ) {
 					const int len = iscsi_connection_pdu_data_read( conn, pdu );
 
 					if ( len < 0 ) {
 						conn->pdu_recv_state = ISCSI_CONNECT_PDU_RECV_STATE_ERR;
 
-						break;
+						return ISCSI_CONNECT_PDU_READ_ERR_FATAL;
 					} else if ( len > 0 ) {
 						return ISCSI_CONNECT_PDU_READ_OK;
 					}
@@ -13746,21 +4160,21 @@ static int iscsi_connection_pdu_read(iscsi_connection *conn)
 
 				int rc;
 
-				if ( (conn->flags & ISCSI_CONNECT_FLAGS_REJECTED) != 0 )
+				conn->pdu_processing = NULL;
+				if ( (conn->flags & ISCSI_CONNECT_FLAGS_REJECTED) != 0 ) {
 					rc = 0;
-				else
+				} else {
 					rc = iscsi_connection_pdu_data_handle( conn, pdu );
+				}
 
-				if ( rc == 0 ) {
-					iscsi_connection_pdu_destroy( pdu );
+				iscsi_connection_pdu_destroy( pdu );
 
-					conn->pdu_processing = NULL;
+				if ( rc == 0 ) {
 					conn->pdu_recv_state = ISCSI_CONNECT_PDU_RECV_STATE_WAIT_PDU_READY;
 
 					return ISCSI_CONNECT_PDU_READ_PROCESSED;
-				} else {
-					conn->pdu_recv_state = ISCSI_CONNECT_PDU_RECV_STATE_ERR;
 				}
+				conn->pdu_recv_state = ISCSI_CONNECT_PDU_RECV_STATE_ERR;
 
 				break;
 			}
@@ -13770,7 +4184,8 @@ static int iscsi_connection_pdu_read(iscsi_connection *conn)
 				break;
 			}
 			default : {
-				logadd( LOG_ERROR, "iscsi_connection_pdu_read: Fatal error reading, unknown packet status. Should NEVER happen! Please report this bug to the developer" );
+				logadd( LOG_ERROR, "iscsi_connection_pdu_read: Fatal error reading, unknown packet status."
+							  " Should NEVER happen! Please report this bug to the developer" );
 
 				break;
 			}
@@ -13780,64 +4195,6 @@ static int iscsi_connection_pdu_read(iscsi_connection *conn)
 	return 0;
 }
 
-#define ISCSI_PDU_HANDLE_COUNT 16
-
-/**
- * @brief Handles incoming PDU data, read up to 16 fragments at once.
- *
- * Until iSCSI processing has been stopped or a
- * complete iSCSI packet has been read, this
- * function will read, parse and process
- * incoming iSCSI protocol data.
- *
- * @param[in] conn Pointer to iSCSI connection to handle.
- * @return Number of proccessed fragments or return
- * code of iscsi_connection_pdu_read in case of a
- * fatal error.
- */
-int iscsi_connection_pdu_handle(iscsi_connection *conn)
-{
-	int i;
-
-	for ( i = 0; i < ISCSI_PDU_HANDLE_COUNT; i++ ) {
-		const int rc = iscsi_connection_pdu_read( conn );
-
-		while ( !iscsi_list_empty( &conn->exec_queue ) ) {
-			iscsi_connection_exec_queue *exec_queue = (iscsi_connection_exec_queue *) iscsi_list_peek( &conn->exec_queue );
-
-			iscsi_list_remove( &exec_queue->node );
-
-			switch ( exec_queue->type ) {
-				case ISCSI_CONNECT_EXEC_QUEUE_TYPE_SCSI_EMU_IO : {
-					exec_queue->data.io.callback( exec_queue->data.io.image, exec_queue->data.io.user_data, exec_queue->data.io.success );
-
-					break;
-				}
-				case ISCSI_CONNECT_EXEC_QUEUE_TYPE_PDU_WRITE : {
-					exec_queue->data.pdu_write.callback( exec_queue->data.pdu_write.user_data, exec_queue->data.pdu_write.err );
-
-					break;
-				}
-				default : {
-					break;
-				}
-			}
-
-			free( exec_queue );
-		}
-
-		if ( rc == ISCSI_CONNECT_PDU_READ_OK )
-			break;
-		else if ( rc == ISCSI_CONNECT_PDU_READ_ERR_FATAL )
-			return rc;
-
-		if ( (conn->flags & ISCSI_CONNECT_FLAGS_STOPPED) != 0 )
-			break;
-	}
-
-	return i;
-}
-
 /**
  * @brief Handles an iSCSI connection until connection is closed.
  *
@@ -13854,173 +4211,22 @@ int iscsi_connection_pdu_handle(iscsi_connection *conn)
  */
 void iscsi_connection_handle(dnbd3_client_t *client, const dnbd3_request_t *request, const int len)
 {
-	_Static_assert( sizeof(dnbd3_request_t) <= sizeof(struct iscsi_bhs_packet), "DNBD3 request size larger than iSCSI BHS packet data size - Manual intervention required!" );
+	_Static_assert( sizeof(dnbd3_request_t) <= sizeof(struct iscsi_bhs_packet),
+		"DNBD3 request size larger than iSCSI BHS packet data size - Manual intervention required!" );
 	sock_setTimeout( client->sock, 1000L * 3600L ); // TODO: Remove after finishing iSCSI implementation
 
-	pthread_rwlock_rdlock( &iscsi_globvec_rwlock );
-
-	if ( iscsi_globvec == NULL )
-		return;
-
-	uint64_t *hash_key;
-	iscsi_portal_group *portal_group = NULL;
-
-	pthread_rwlock_wrlock( &iscsi_globvec->portal_groups_rwlock );
-
-	int rc = iscsi_hashmap_get( iscsi_globvec->portal_groups, (uint8_t *) &iscsi_globvec->portal_groups->last_insert_id, sizeof(iscsi_globvec->portal_groups->last_insert_id), (uint8_t **) &portal_group );
-
-	if ( portal_group == NULL ) {
-		hash_key = (uint64_t *) malloc( sizeof(uint64_t) );
-
-		if ( hash_key == NULL ) {
-			logadd( LOG_ERROR, "iscsi_connection_handle: Out of memory while allocating iSCSI portal group" );
-
-			pthread_rwlock_unlock( &iscsi_globvec->portal_groups_rwlock );
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return;
-		}
-
-		iscsi_hashmap_key_create_id( iscsi_globvec->portal_groups, hash_key );
-		portal_group = iscsi_portal_group_create( *hash_key, 0 );
-
-		if ( portal_group == NULL ) {
-			logadd( LOG_ERROR, "iscsi_connection_handle: Out of memory while allocating iSCSI portal group" );
-
-			iscsi_hashmap_key_destroy( (uint8_t *) hash_key );
-			pthread_rwlock_unlock( &iscsi_globvec->portal_groups_rwlock );
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return;
-		}
-
-		portal_group->tag = *hash_key;
-
-		iscsi_hashmap_key_destroy( (uint8_t *) hash_key );
-
-		rc = iscsi_hashmap_put( iscsi_globvec->portal_groups, (uint8_t *) &portal_group->tag, sizeof(portal_group->tag), (uint8_t *) portal_group );
-
-		if ( rc < 0 ) {
-			iscsi_portal_group_destroy( portal_group );
-			pthread_rwlock_unlock( &iscsi_globvec->portal_groups_rwlock );
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return;
-		}
-	}
-
-	pthread_rwlock_unlock( &iscsi_globvec->portal_groups_rwlock );
-	host_to_string( &client->host, client->hostName, HOSTNAMELEN );
-
-	const uint8_t *port = memchr( client->hostName, ':', HOSTNAMELEN );
-	const uint host_len = ((port != NULL) ? (uint) (port++ - (uint8_t *) client->hostName) : (uint) strlen( client->hostName ));
-	uint8_t *host       = malloc( (host_len + 1U) );
-
-	if ( host == NULL ) {
-		logadd( LOG_ERROR, "iscsi_connection_handle: Out of memory while allocating iSCSI portal host name" );
-
-		pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-		return;
-	}
-
-	memcpy( host, client->hostName, host_len );
-	host[host_len] = '\0';
-
-	uint8_t *tmp_buf;
-
-	if ( port != NULL )
-		tmp_buf = iscsi_sprintf_alloc( "%s:%s", host, port );
-	else
-		tmp_buf = iscsi_sprintf_alloc( "%s:%u", host, PORT );
-
-	if ( tmp_buf == NULL ) {
-		logadd( LOG_ERROR, "iscsi_connection_handle: Out of memory while allocating temporarily iSCSI portal name" );
-
-		free( host );
-		pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-		return;
-	}
-
-	const uint key_len = (uint) (strlen( (char *) tmp_buf ) + 1U);
-
-	hash_key = (uint64_t *) iscsi_hashmap_key_create( tmp_buf, key_len );
-
-	free( tmp_buf );
-
-	if ( hash_key == NULL ) {
-		logadd( LOG_ERROR, "iscsi_connection_handle: Out of memory while allocating temporarily iSCSI portal name hash key" );
-
-		free( host );
-		pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-		return;
-	}
-
-	iscsi_portal *portal = NULL;
-
-	pthread_rwlock_wrlock( &iscsi_globvec->portal_groups_rwlock );
-	rc = iscsi_hashmap_get( portal_group->portals, (uint8_t *) hash_key, key_len, (uint8_t **) &portal );
-
-	if ( portal == NULL ) {
-		if ( port == NULL ) {
-			port = (uint8_t *) strchr( (char *) hash_key, ':' );
-			port++;
-		}
-
-		portal = iscsi_portal_create( host, port );
-
-		if ( portal == NULL ) {
-			logadd( LOG_ERROR, "iscsi_connection_handle: Out of memory while allocating iSCSI portal" );
-
-			pthread_rwlock_unlock( &iscsi_globvec->portal_groups_rwlock );
-			iscsi_hashmap_key_destroy( (uint8_t *) hash_key );
-			free( host );
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return;
-		}
-
-		rc = iscsi_portal_group_add_portal( portal_group, portal );
-
-		if ( rc < 0 ) {
-			pthread_rwlock_unlock( &iscsi_globvec->portal_groups_rwlock );
-			iscsi_portal_destroy( portal );
-			iscsi_hashmap_key_destroy( (uint8_t *) hash_key );
-			free( host );
-			pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
-			return;
-		}
-	}
-
-	iscsi_hashmap_key_destroy( (uint8_t *) hash_key );
-	free( host );
-
-	iscsi_connection *conn = iscsi_connection_create( portal, client->sock );
+	iscsi_connection *conn = iscsi_connection_create( client );
 
 	if ( conn == NULL ) {
 		logadd( LOG_ERROR, "iscsi_connection_handle: Out of memory while allocating iSCSI connection" );
 
-		iscsi_portal_group_del_portal( portal_group, portal );
-		iscsi_portal_destroy( portal );
-		pthread_rwlock_unlock( &iscsi_globvec_rwlock );
-
 		return;
 	}
 
-	pthread_rwlock_unlock( &iscsi_globvec->portal_groups_rwlock );
-
-	conn->pdu_processing = iscsi_connection_pdu_create( conn, 0U, 0, 0UL, 0 );
+	conn->pdu_processing = iscsi_connection_pdu_create( conn, 0UL );
 
 	if ( conn->pdu_processing == NULL ) {
 		iscsi_connection_destroy( conn );
-		pthread_rwlock_wrlock( &iscsi_globvec->portal_groups_rwlock );
-		iscsi_portal_group_del_portal( portal_group, portal );
-		pthread_rwlock_unlock( &iscsi_globvec->portal_groups_rwlock );
-		iscsi_portal_destroy( portal );
-		pthread_rwlock_unlock( &iscsi_globvec_rwlock );
 
 		return;
 	}
@@ -14028,52 +4234,15 @@ void iscsi_connection_handle(dnbd3_client_t *client, const dnbd3_request_t *requ
 	memcpy( conn->pdu_processing->bhs_pkt, request, len );
 
 	conn->pdu_processing->bhs_pos = len;
-	conn->pdu_recv_state          = ISCSI_CONNECT_PDU_RECV_STATE_WAIT_PDU_HDR;
-
-	logadd( LOG_INFO, "" );
-	logadd( LOG_INFO, "iSCSI connection opened for device %s from initiator %s using port %s and portal %s:%s", (conn->device != NULL ? (char *) conn->device->name : "(null)"), (char *) conn->init_name, ((conn->init_port != NULL) ? (char *) conn->init_port->name : "(null)"), (char *) portal->host, (char *) portal->port );
-
-	while ( iscsi_connection_pdu_handle( conn ) >= ISCSI_CONNECT_PDU_READ_OK ) {
-	}
-
-	iscsi_hashmap_bucket *stat_bucket;
-
-	logadd( LOG_INFO, "iSCSI connection closed for device %s from initiator %s using port %s and portal %s:%s", (conn->device != NULL ? (char *) conn->device->name : "(null)"), (char *) conn->init_name, ((conn->init_port != NULL) ? (char *) conn->init_port->name : "(null)"), (char *) portal->host, (char *) portal->port );
-
-	iscsi_list_foreach_node ( &conn->stat_iscsi_opcodes->list, stat_bucket ) {
-		uint64_t *stat_opcode = (uint64_t *) stat_bucket->value;
-
-		logadd( LOG_INFO, "iSCSI opcode usage statistics for device %s from initiator %s using port %s and portal %s:%s: Opcode 0x%02" PRIX64 " has been received %" PRIu64 " times until connection drop.", (conn->device != NULL ? (char *) conn->device->name : "(null)"), (char *) conn->init_name, ((conn->init_port != NULL) ? (char *) conn->init_port->name : "(null)"), (char *) portal->host, (char *) portal->port, *(uint64_t *) stat_bucket->key, *stat_opcode );
-	}
-
-	iscsi_list_foreach_node ( &conn->stat_scsi_opcodes->list, stat_bucket ) {
-		uint64_t *stat_opcode = (uint64_t *) stat_bucket->value;
-
-		logadd( LOG_INFO, "iSCSI SCSI CDB opcode usage statistics for device %s from initiator %s using port %s and portal %s:%s: SCSI CDB opcode 0x%02" PRIX64 " has been received %" PRIu64 " times until connection drop.", (conn->device != NULL ? (char *) conn->device->name : "(null)"), (char *) conn->init_name, ((conn->init_port != NULL) ? (char *) conn->init_port->name : "(null)"), (char *) portal->host, (char *) portal->port, *(uint64_t *) stat_bucket->key, *stat_opcode );
-	}
+	conn->pdu_recv_state = ISCSI_CONNECT_PDU_RECV_STATE_WAIT_PDU_HDR;
 
-	iscsi_session *session = conn->session;
-
-	if ( session != NULL ) {
-		pthread_rwlock_wrlock( &iscsi_globvec->sessions_rwlock );
-		iscsi_list_remove( &conn->node );
-
-		if ( --session->conns == 0UL ) {
-			const uint64_t tsih = session->tsih;
-
-			iscsi_hashmap_remove( iscsi_globvec->sessions, (uint8_t *) &tsih, sizeof(tsih) );
-			iscsi_session_destroy( session );
-		}
+	static atomic_int CONN_ID = 0;
+	conn->id = ++CONN_ID;
 
-		pthread_rwlock_unlock( &iscsi_globvec->sessions_rwlock );
+	while ( iscsi_connection_pdu_read( conn ) >= ISCSI_CONNECT_PDU_READ_OK ) {
+		if ( (conn->flags & ISCSI_CONNECT_FLAGS_STOPPED) != 0 )
+			break;
 	}
 
 	iscsi_connection_destroy( conn );
-
-	pthread_rwlock_wrlock( &iscsi_globvec->portal_groups_rwlock );
-	iscsi_portal_group_del_portal( portal_group, portal );
-	iscsi_portal_destroy( portal );
-	pthread_rwlock_unlock( &iscsi_globvec->portal_groups_rwlock );
-
-	pthread_rwlock_unlock( &iscsi_globvec_rwlock );
 }
diff --git a/src/server/iscsi.h b/src/server/iscsi.h
index ded2d1d..0c279fe 100644
--- a/src/server/iscsi.h
+++ b/src/server/iscsi.h
@@ -32,10 +32,6 @@
 #ifndef DNBD3_ISCSI_H_
 #define DNBD3_ISCSI_H_
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 #include <limits.h>
 #include <stdbool.h>
 #include <stdint.h>
@@ -48,23 +44,23 @@ extern "C" {
 #include "image.h"
 
 #if defined(__GNUC__) && (defined(__x86_64__) || defined(__i386__))
-     // GCC-compatible compiler, targeting x86/x86-64
-     #include <x86intrin.h>
+	 // GCC-compatible compiler, targeting x86/x86-64
+	 #include <x86intrin.h>
 #elif defined(__GNUC__) && defined(__ARM_NEON__)
-     // GCC-compatible compiler, targeting ARM with NEON
-     #include <arm_neon.h>
+	 // GCC-compatible compiler, targeting ARM with NEON
+	 #include <arm_neon.h>
 #elif defined(__GNUC__) && defined(__IWMMXT__)
-     // GCC-compatible compiler, targeting ARM with WMMX
-     #include <mmintrin.h>
+	 // GCC-compatible compiler, targeting ARM with WMMX
+	 #include <mmintrin.h>
 #elif (defined(__GNUC__) || defined(__xlC__)) && (defined(__VEC__) || defined(__ALTIVEC__))
-     // XLC or GCC-compatible compiler, targeting PowerPC with VMX/VSX
-     #include <altivec.h>
+	 // XLC or GCC-compatible compiler, targeting PowerPC with VMX/VSX
+	 #include <altivec.h>
 #elif defined(__GNUC__) && defined(__SPE__)
-     // GCC-compatible compiler, targeting PowerPC with SPE
-     #include <spe.h>
+	 // GCC-compatible compiler, targeting PowerPC with SPE
+	 #include <spe.h>
 #elif defined(_MSC_VER)
-     // Microsoft C/C++-compatible compiler
-     #include <intrin.h>
+	 // Microsoft C/C++-compatible compiler
+	 #include <intrin.h>
 #endif
 
 #if defined(__BIG_ENDIAN__) || (defined(__BYTE_ORDER) && defined(__BIG_ENDIAN) && __BYTE_ORDER == __BIG_ENDIAN) || (defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
@@ -241,76 +237,6 @@ static inline bool iscsi_is_pow2(const uint32_t value)
 	return ((value & (value - 1UL)) == 0UL);
 }
 
-/**
- * @brief Rounds up a positive 32-bit integer value to the nearest power of two.
- *
- * This function is used to ensure that
- * a value is always a power of two by
- * rounding up.\n
- * An input value of zero is NOT
- * handled correctly.
- *
- * @param[in] value Positive value to round up to
- * the nearest power of two.
- * @return Rounded up nearest power of two.
- */
-static inline uint32_t iscsi_align_pow2_ceil(const uint32_t value)
-{
-    uint32_t num_value = (value - 1UL); // 1UL << (lg(value - 1UL) + 1UL)
-
-    num_value |= (num_value >>  1UL);
-    num_value |= (num_value >>  2UL);
-    num_value |= (num_value >>  4UL);
-    num_value |= (num_value >>  8UL);
-    num_value |= (num_value >> 16UL);
-
-    return ++num_value;
-}
-
-/**
- * @brief Calculates the shift factor for a power of two value.
- *
- * This function is used to determine
- * the shift factor to use instead of
- * using very slow multiplication,
- * division and modulo operations.
- *
- * @param[in] value Value to retrieve the
- * the shift factor for. May NOT be
- * zero in which case the result is
- * undefined.
- * @return The shift count to use as a
- * replacement for multiplication
- * and division.
- */
-static inline uint32_t iscsi_get_log2_of_pow2(const uint32_t value)
-{
-#if defined(__clang__) || defined(__GNUC__) || defined(__GNUG__) || defined(__INTEL_COMPILER) || defined(__ECC)
-// GCC, CLang or Intel Compiler
-	return (((sizeof(uint32_t) * CHAR_BIT) - 1UL) - (uint32_t) __builtin_clz( value ));
-#elif defined(_MSC_VER)
-// MSVC
-	uint32_t shift;
-
-	_BitScanReverse( &shift, value );
-
-	return (((sizeof(uint32_t) * CHAR_BIT) - 1UL) - shift);
-#else
-// Other compilers (use slow parallel calculation method with logical OR, bit shift, logcal AND)
-	uint32_t shift = ((value & 0xAAAAAAAAUL) != 0UL);
-
-	shift |= ((value & 0xCCCCCCCCUL) != 0UL) << 1UL;
-	shift |= ((value & 0xF0F0F0F0UL) != 0UL) << 2UL;
-	shift |= ((value & 0xFF00FF00UL) != 0UL) << 3UL;
-	shift |= ((value & 0xFFFF0000UL) != 0UL) << 4UL;
-
-	return shift;
-#endif
-}
-
-
-/// Determines the container of member b in struct a of type x.
-#define ISCSI_CONTAINER(x, a, b) ((x *) (((uint8_t *) (a)) - offsetof(x, b)))
 
 /// Determines the next offset after member b of struct a.
 #define ISCSI_NEXT_OFFSET(a, b) (offsetof(struct a, b) + sizeof(((struct a *) 0)->b))
@@ -365,434 +291,7 @@ static inline uint32_t iscsi_get_log2_of_pow2(const uint32_t value)
 
 
 /// Determines the length of a zero terminated string at compile time.
-#define ISCSI_STRLEN(x) ((sizeof(x) / sizeof(uint8_t)) - sizeof(uint8_t))
-
-
-uint8_t *iscsi_vsprintf_append_realloc(char *buf, const char *format, va_list args); // Allocates and appends a buffer and sprintf's it
-uint8_t *iscsi_sprintf_append_realloc(char *buf, const char *format, ...); // Allocates and appends a buffer and sprintf's it
-uint8_t *iscsi_vsprintf_alloc(const char *format, va_list args); // Allocates a buffer and sprintf's it
-uint8_t *iscsi_sprintf_alloc(const char *format, ... ); // Allocates a buffer and sprintf's it
-void iscsi_strcpy_pad(char *dst, const char *src, const size_t size, const int pad); // Copies a string with additional padding character to fill in a specified size
-
-
-/// Shift factor for default capacity.
-#define ISCSI_HASHMAP_DEFAULT_CAPACITY_SHIFT 5UL
-
-/// Default capacity is 32 buckets.
-#define ISCSI_HASHMAP_DEFAULT_CAPACITY (1UL << (ISCSI_HASHMAP_DEFAULT_CAPACITY_SHIFT))
-
-/// Number of bits to shift left when resizing.
-#define ISCSI_HASHMAP_RESIZE_SHIFT 1UL
-
-/// Key data shift value for alignment enforcement.
-#define ISCSI_HASHMAP_KEY_ALIGN_SHIFT 3UL
-
-/// Key data size MUST be multiple of 8 bytes by now.
-#define ISCSI_HASHMAP_KEY_ALIGN (1UL << (ISCSI_HASHMAP_KEY_ALIGN_SHIFT))
-
-
-/// Initial hash code.
-#define ISCSI_HASHMAP_HASH_INITIAL 0x811C9DC5UL
-
-/// Value to multiply hash code with.
-#define ISCSI_HASHMAP_HASH_MUL     0xBF58476D1CE4E5B9ULL
-
-
-typedef struct iscsi_node iscsi_node;
-
-
-/**
- * @brief Doubly linked list node structure.
- *
- * This structure is used by the iSCSI doubly linked list
- * implementation in order to maintain the elements.
- */
-typedef struct iscsi_node {
-    /// Successor node in node list. Must be first element.
-    iscsi_node *succ;
-
-    /// Predecessor node in node list. Must be second element.
-    iscsi_node *pred;
-} iscsi_node;
-
-
-/**
- * @brief Doubly linked list structure.
- *
- * This structure is used by the iSCSI doubly linked list
- * implementation in order to maintain the elements.
- */
-typedef struct iscsi_list {
-    /// Head of linked list. Must be first element.
-    iscsi_node *head;
-
-    /// Tail of linked list. Must be second element and always be NULL.
-    iscsi_node *tail;
-
-    /// Tail predecessor of linked list. Must be third element.
-    iscsi_node *pred;
-} iscsi_list;
-
-
-/// foreach( ( list => entry ) usage style forward iterator over all nodes in a doubly linked list.
-#define iscsi_list_foreach(list, entry) for ( (entry) = (list)->head; (entry)->succ != NULL; (entry) = (entry)->succ )
-
-/// foreach( ( list => (typeof(entry)) as field ) usage style forward iterator over all nodes in a doubly linked list embedded into another structure with default node field name.
-#define iscsi_list_foreach_field(list, entry, field) for ( (entry) = (__typeof__(entry)) (list)->head; (__typeof__(entry)) (entry)->field.succ != NULL; (entry) = (__typeof__(entry)) (entry)->field.succ )
-
-/// foreach( ( list => (typeof(entry)) entry->node.succ ) usage style forward iterator over all nodes in a doubly linked list embedded into another structure with default node field name.
-#define iscsi_list_foreach_node(list, entry) iscsi_list_foreach_field(list, entry, node)
-
-/// foreach( ( list => entry ) usage style forward iterator over all nodes in a doubly linked list.
-#define iscsi_list_foreach_safe(list, entry, tmp) for ( (entry) = (list)->head; ((entry)->succ != NULL) && ((tmp) = (entry)->succ, true); (entry) = (tmp) )
-
-/// foreach( ( list => (typeof(entry)) as field ) usage style forward iterator over all nodes in a doubly linked list embedded into another structure with default node field name.
-#define iscsi_list_foreach_safe_field(list, entry, field, tmp) for ( (entry) = (__typeof__(entry)) (list)->head; ((entry)->field.succ != NULL) && ((tmp) = (__typeof__(entry)) (entry)->field.succ, true); (entry) = (tmp) )
-
-/// foreach( ( list => (typeof(entry)) entry->node.succ ) usage style forward iterator over all nodes in a doubly linked list embedded into another structure with default node field name.
-#define iscsi_list_foreach_safe_node(list, entry, tmp) iscsi_list_foreach_safe_field(list, entry, node, tmp)
-
-
-/**
- * @brief Initializes a doubly linked list for usage.
- *
- * This function sets the head of the list to
- * the pointer of the list's tail, the tail
- * itself to NULL and the predecessor to the
- * pointer of the list's head.
- *
- * @param[in] list Pointer to idoubly linked list to
- * initialize. May NOT be NULL, so be careful.
- * */
-static inline void iscsi_list_create(iscsi_list *list)
-{
-	list->head = (iscsi_node *) &list->tail;
-	list->tail = NULL;
-	list->pred = (iscsi_node *) &list->head;
-}
-
-/**
- * @brief Clears an already initialized doubly linked list.
- *
- * This function sets the head of the list to
- * the pointer of the list's tail and the
- * predecessor to the pointer of the list's
- * head.
- *
- * @param[in] list Pointer to idoubly linked list to
- * initialize. May NOT be NULL, so be careful.
- * */
-static inline void iscsi_list_clear(iscsi_list *list)
-{
-	list->head = (iscsi_node *) &list->tail;
-	list->pred = (iscsi_node *) &list->head;
-}
-
-/**
- * @brief Adds a node at the head of a doubly linked list.
- *
- * This function sets the head of the list to
- * the node and adjusts the list and node
- * pointers accordingly.
- *
- * @param[in] list Pointer to doubly linked list to add to
- * the head. May NOT be NULL, so be careful.
- * @param[in] node Pointer to node to add to the head of
- * the list. NULL is NOT allowed here, take
- * caution.
- */
-static inline void iscsi_list_push(iscsi_list *list, iscsi_node *node)
-{
-	iscsi_node *head = list->head;
-
-	list->head = node;
-	head->pred = node;
-
-	node->succ = head;
-	node->pred = (iscsi_node *) &list->head;
-}
-
-/**
- * @brief Adds a node at the tail of a doubly linked list.
- *
- * This function sets the tail of the list to
- * the node and adjusts the list and node
- * pointers accordingly.
- *
- * @param[in] list Pointer to doubly linked list to add to
- * the tail. May NOT be NULL, so be careful.
- * @param[in] node Pointer to node to add to the tail of
- * the list. NULL is NOT allowed here, take
- * caution.
- */
-static inline void iscsi_list_enqueue(iscsi_list *list, iscsi_node *node)
-{
-	iscsi_node *tail = list->pred;
-
-	list->pred = node;
-	tail->succ = node;
-
-	node->succ = (iscsi_node *) &list->tail;
-	node->pred = tail;
-}
-
-/**
- * @brief Inserts a node into a doubly linked list before an already existing node.
- *
- * This function sets the successor of the
- * new node to the successor of the
- * existing predecessor node and the
- * predecessor of the new node to the
- * the existing predecessor node itself
- * and adjusts the list pointers
- * accordingly.
- *
- * @param[in] list Pointer to doubly linked list to insert the
- * node into. May NOT be NULL, so be careful.
- * @param[in] node Pointer to node to be inserted into the
- * list. NULL is NOT allowed here, take
- * caution.
- * @param[in] pred Pointer to node which should be the
- * previous node of the new inserted node.
- * May be NULL in which case the new node
- * is inserted at the head of the list.
- */
-static inline void iscsi_list_insert(iscsi_list *list, iscsi_node *node, iscsi_node *pred)
-{
-	if ( pred == NULL ) {
-		iscsi_node *head = list->head;
-
-		list->head = node;
-		head->pred = node;
-
-		node->succ = head;
-		node->pred = (iscsi_node *) &list->head;
-
-		return;
-	}
-
-	iscsi_node *tail = pred->succ;
-
-	if ( tail == NULL ) {
-		tail       = pred->pred;
-
-		node->succ = pred;
-		node->pred = tail;
-
-		pred->pred = node;
-		tail->succ = node;
-
-		return;
-	}
-
-	node->succ = tail;
-	node->pred = pred;
-
-	tail->pred = node;
-	pred->succ = node;
-}
-
-/**
- * @brief Removes the node from the head of a doubly linked list.
- *
- * This function sets the head of the list to
- * its successor and adjusts the list and
- * node pointers accordingly.
- *
- * @param[in] list Pointer to doubly linked list to remove the
- * head from. May NOT be NULL, so be careful.
- */
-static inline void iscsi_list_pop(iscsi_list *list)
-{
-	iscsi_node *head = list->head;
-	iscsi_node *node = head->succ;
-
-	if ( node == NULL )
-		return;
-
-	list->head = node;
-
-	node->pred = (iscsi_node *) &list->head;
-}
-
-/**
- * @brief Removes the node from the tail of a doubly linked list.
- *
- * This function sets the tail of the list to
- * its predecessor and adjusts the list and
- * node pointers accordingly.
- *
- * @param[in] list Pointer to doubly linked list to remove the
- * tail from. May NOT be NULL, so be careful.
- */
-static inline void iscsi_list_dequeue(iscsi_list *list)
-{
-	iscsi_node *tail = list->pred;
-	iscsi_node *node = tail->pred;
-
-	if ( node == NULL )
-		return;
-
-	list->pred = node;
-
-	node->succ = (iscsi_node *) &list->tail;
-}
-
-/**
- * @brief Removes a specified node from a doubly linked list.
- *
- * This function sets the successor of the
- * node's predecessor and the predecessor
- * of the node's successor by adjusting
- * the list and node pointers accordingly.
- *
- * @param[in] node Pointer to node to be removed from
- * the list. May NOT be NULL, so
- * be careful.
- */
-static inline void iscsi_list_remove(iscsi_node *node)
-{
-	iscsi_node *succ = node->succ;
-	iscsi_node *pred = node->pred;
-
-	pred->succ = succ;
-	succ->pred = pred;
-}
-
-/**
- * @brief Checks whether a doubly linked list is empty.
- *
- * Whenever this function returns false,
- * iscsi_list_peek will return a pointer
- * to the first node in the list.
- *
- * @param[in] list Pointer to doubly linked list to check if
- * empty. May NOT be NULL, so be careful.
- * @retval true The doubly linked list is empty.
- * @retval false The doubly linked list contains nodes.
- */
-static inline bool iscsi_list_empty(const iscsi_list *list)
-{
-	return (list->head->succ == NULL);
-}
-
-/**
- * @brief Gets the node from the head of a doubly linked list.
- *
- * This function returns NULL if the list is
- * empty.
- *
- * @param[in] list Pointer to doubly linked list to get the
- * head from. May NOT be NULL, so be careful.
- * @return Pointer to doubly linked list node of the
- * head or NULL if the list is empty.
- */
-static inline iscsi_node *iscsi_list_peek(const iscsi_list *list)
-{
-	iscsi_node *head = list->head;
-
-	return (head->succ != NULL) ? head : NULL;
-}
-
-
-/**
- * @brief Hash map bucket containing key, value and hash code.
- *
- * This structure is used by the iSCSI hash map implementation
- * in order to maintain the elements.
- */
-typedef struct iscsi_hashmap_bucket {
-    /// Next bucket, MUST be first element.
-	iscsi_node node;
-
-    /// Data used as key, MUST be aligned to 8 bytes and zero padded.
-	uint8_t *key;
-
-    /// Size of key.
-	size_t key_size;
-
-    /// Hash code for the key.
-	uint32_t hash;
-
-    /// Associate4d value to the key, NULL is allowed.
-	uint8_t *value;
-} iscsi_hashmap_bucket;
-
-/**
- * @brief Hash map containing an expandable list of buckets
- *
- * This structure is used by the ultra performant hash map
- * implementation. It uses a linked list allowing fast
- * insertions. Elements can be removed.
- */
-typedef struct iscsi_hashmap {
-    /// Linked list containing the hash map buckets.
-	iscsi_hashmap_bucket *buckets;
-
-    /// Doubly linked list for fast insertion.
-    iscsi_list list;
-
-    /// Last inserted unique identifier (primary key).
-	uint64_t last_insert_id;
-
-    /// Current bucket capacity, MUST be a power of two.
-    uint capacity;
-
-    /// Current capacity threshold triggering resize operation.
-	uint cap_load;
-
-	/// Current count of buckets.
-	uint count;
-} iscsi_hashmap;
-
-/**
- * @brief Callback for iterating over map, freeing and removing entries. user_data is free for personal use.
- *
- * Callback function. This is a pointer to a
- * function for various purposes like iterating
- * through a hash map. It is also used for replacing
- * already existing keys or for key removal.
- *
- * @param[in] key Pointer to zero padded key. NULL is
- * an invalid pointer here, so be careful.
- * @param[in] key_size Number of bytes for the key, MUST
- * be a multiple of 8 bytes which is NOT checked, so
- * be careful.
- * @param[in] value Value of the key, NULL is allowed.
- * @param[in,out] user_data User data to be used by the
- * callback function. User data can be modified if
- * desired and may also be NULL if the callback
- * function handles this case. See the documentation
- * of the callback implementation for details.
- * @return A negative result indicates as fatal error,
- * 0 means successful operation and a positive value
- * indicates a non-fatal error or a warning.
- */
-typedef int (*iscsi_hashmap_callback)(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data);
-
-iscsi_hashmap *iscsi_hashmap_create(const uint capacity); // Creates an empty hash map with either specified or default capacity
-void iscsi_hashmap_destroy(iscsi_hashmap *map); // Deallocates the hash map objects and buckets, not elements
-                                                // Use iscsi_hashmap_iterate to deallocate the elements themselves
-
-uint8_t *iscsi_hashmap_key_create(const uint8_t *data, const size_t len); // Creates a key suitable for hashmap usage (ensures 8-byte boundary and zero padding)
-void iscsi_hashmap_key_create_id(iscsi_hashmap *map, uint64_t *key); // Creates an unique key identifier suitable for hashmap usage (ensures 8-byte boundary and zero padding)
-void iscsi_hashmap_key_destroy(uint8_t *key); // Deallocates all resources acquired by iscsi_hashmap_create_key
-int iscsi_hashmap_key_destroy_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data); // Deallocates a key in a hash map
-int iscsi_hashmap_destroy_value_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data); // Deallocates a value in a hash map
-int iscsi_hashmap_key_destroy_value_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data); // Deallocates a key / value pair in a hash map by calling free (default destructor)
-
-int iscsi_hashmap_put(iscsi_hashmap *map, uint8_t *key, const size_t key_size, uint8_t *value); // Assigns key / value pair to hash map at the tail of doubly linked list without making copies
-int iscsi_hashmap_get_put(iscsi_hashmap *map, uint8_t *key, const size_t key_size, uint8_t **out_in_value); // Assigns key / value pair to hash map at the tail of doubly linked list without making copies
-int iscsi_hashmap_put_free(iscsi_hashmap *map, uint8_t *key, const size_t key_size, uint8_t *value, iscsi_hashmap_callback callback, uint8_t *user_data); // Assigns key / value pair to hash map without making copies with callback function in case the key already exists
-bool iscsi_hashmap_contains(iscsi_hashmap *map, const uint8_t *key, const size_t key_size); // Checks whether a specified key exists
-int iscsi_hashmap_get(iscsi_hashmap *map, const uint8_t *key, const size_t key_size, uint8_t **out_value); // Retrieves the value of a specified key
-
-void iscsi_hashmap_remove(iscsi_hashmap *map, const uint8_t *key, const size_t key_size); // Removes an element both from the doubly linked list and by setting the key to NULL
-void iscsi_hashmap_remove_free(iscsi_hashmap *map, const uint8_t *key, const size_t key_size, iscsi_hashmap_callback callback, uint8_t *user_data); // Removes an element both from the doubly linked list and by setting the key to NULL and invokes a callback function before actual removal
-
-uint iscsi_hashmap_size(const iscsi_hashmap *map); // Retrieves the number of elements of the hash map
-
-int iscsi_hashmap_iterate(iscsi_hashmap *map, iscsi_hashmap_callback callback, uint8_t *user_data); // Iterator with callback function invoked on each element
+#define ISCSI_STRLEN(x) ((sizeof(x) / sizeof(uint8_t)) - 1)
 
 
 /* iSCSI protocol stuff (all WORD/DWORD/QWORD values are big endian by default
@@ -805,7 +304,7 @@ int iscsi_hashmap_iterate(iscsi_hashmap *map, iscsi_hashmap_callback callback, u
 #define ISCSI_MAX_AHS_SIZE (255UL << 2UL)
 
 /// iSCSI DataSegment maximum allowed size.
-#define ISCSI_MAX_DS_SIZE 16777215UL
+#define ISCSI_MAX_DS_SIZE 16777215
 
 /// iSCSI packet data alignment (BHS, AHS and DataSegment).
 #define ISCSI_ALIGN_SIZE 4UL
@@ -815,10 +314,10 @@ int iscsi_hashmap_iterate(iscsi_hashmap *map, iscsi_hashmap_callback callback, u
 
 
 /// iSCSI Default receive DataSegment (DS) size in bytes.
-#define ISCSI_DEFAULT_RECV_DS_LEN 8192UL
+#define ISCSI_DEFAULT_RECV_DS_LEN 131072UL
 
 /// iSCSI default maximum DataSegment receive length in bytes.
-#define ISCSI_DEFAULT_MAX_RECV_DS_LEN 65536UL
+#define ISCSI_DEFAULT_MAX_RECV_DS_LEN 524288UL
 
 
 /// iSCSI default maximum Ready To Transfer (R2T) active tasks.
@@ -941,6 +440,7 @@ int iscsi_hashmap_iterate(iscsi_hashmap *map, iscsi_hashmap_callback callback, u
 /// iSCSI opcode flags (I) Immediate bit: For Request PDUs, the I bit set to 1 is an immediate delivery marker.
 #define ISCSI_OPCODE_FLAGS_IMMEDIATE (1 << 6L)
 
+#define ASSERT_IS_BHS(structname) _Static_assert( sizeof(structname) == ISCSI_BHS_SIZE, #structname " messed up" )
 
 /**
  * @brief iSCSI Basic Header Segment packet data.
@@ -951,32 +451,34 @@ int iscsi_hashmap_iterate(iscsi_hashmap *map, iscsi_hashmap_callback callback, u
  * has been determined.
  */
 typedef struct __attribute__((packed)) iscsi_bhs_packet {
-    /// Command opcode.
-    uint8_t opcode;
+	/// Command opcode.
+	uint8_t opcode;
 
-    /// Opcode-specific fields.
-    uint8_t opcode_fields[3];
+	/// Opcode-specific fields.
+	uint8_t opcode_fields[3];
 
-    /// Total length of AHS (Advanced Header Segment).
-    uint8_t total_ahs_len;
+	/// Total length of AHS (Advanced Header Segment).
+	uint8_t total_ahs_len;
 
-    /// Length of Data Segment.
-    uint8_t ds_len[3];
+	/// Length of Data Segment.
+	uint8_t ds_len[3];
 
-    union {
-        /// SCSI LUN bit mask.
-        uint64_t lun;
+	union {
+		/// SCSI LUN bit mask.
+		uint64_t lun;
 
-        /// Opcode-specific fields.
-        uint8_t opcode_spec[8];
-    } lun_opcode;
+		/// Opcode-specific fields.
+		uint8_t opcode_spec[8];
+	} lun_opcode;
 
-    /// Initiator Task Tag (ITT).
-    uint32_t init_task_tag;
+	/// Initiator Task Tag (ITT).
+	uint32_t init_task_tag;
 
-    /// Opcode-specific fields.
-    uint8_t opcode_spec_fields[28];
+	/// Opcode-specific fields.
+	uint8_t opcode_spec_fields[28];
 } iscsi_bhs_packet;
+ASSERT_IS_BHS( iscsi_bhs_packet );
+
 
 
 /// iSCSI AHS type: Extended Command Descriptor Block (CDB).
@@ -995,61 +497,19 @@ typedef struct __attribute__((packed)) iscsi_bhs_packet {
  * has been determined.
  */
 typedef struct __attribute__((packed)) iscsi_ahs_packet {
-    /// AHSLength.
-    uint16_t len;
+	/// AHSLength.
+	uint16_t len;
 
-    /// AHSType.
-    uint8_t type;
+	/// AHSType.
+	uint8_t type;
 
-    /// AHS-Specific.
-    uint8_t specific;
+	/// AHS-Specific.
+	uint8_t specific;
 
-    /// AHS-Specific data.
-    uint8_t data[0];
+	/// AHS-Specific data.
+	uint8_t data[0];
 } iscsi_ahs_packet;
 
-
-/**
- * @brief iSCSI Extended CDB AHS packet data structure.
- *
- * This type of AHS MUST NOT be used if the CDBLength is less than 17.
- * The length includes the reserved byte 3.
- */
-typedef struct __attribute__((packed)) iscsi_ext_cdb_ahs_packet {
-    /// AHSLength: AHSLength - (CDBLength - 15).
-    uint16_t len;
-
-    // AHSType: Identifier (always 1 according to iSCSI specifications).
-    uint8_t type;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint8_t reserved;
-
-    /// ExtendedCDB.
-    uint8_t data[0];
-} iscsi_ext_cdb_ahs_packet;
-
-/**
- * @brief iSCSI Bidirectional Read Expected Data Transfer Length AHS packet data structure.
- *
- * This structure is used to determine the bidirectional read
- * expected data transfer length.
- */
-typedef struct __attribute__((packed)) iscsi_bidi_read_exp_xfer_ahs_packet {
-    /// AHSLength: Always 5 according to iSCSI specifications for now.
-    uint16_t len;
-
-    /// AHSType: Always 2 according to iSCSI specifications for now.
-    uint8_t type; // Identifier (always 0x02 according to specs)
-
-    /// Reserved for future usage, always MUST be 0.
-    uint8_t reserved;
-
-    /// Bidirectional Read Expected Data Transfer Length.
-    uint32_t bidi_read_exp_xfer_len;
-} iscsi_bidi_read_exp_xfer_ahs_packet;
-
-
 /**
  * @brief DataSegment Error: Unexpected unsolicited data.
  *
@@ -1091,84 +551,6 @@ typedef struct __attribute__((packed)) iscsi_bidi_read_exp_xfer_ahs_packet {
  */
 #define ISCSI_DS_ERROR_INCORRECT_AMOUNT_OF_DATA_ASCQ 0x0D
 
-
-/**
- * @brief DataSegment Error: Protocol Service CRC error.
- *
- * Certain iSCSI conditions result in the command being terminated at
- * the target (response code of Command Completed at Target) with a SCSI
- * CHECK CONDITION Status as outlined in the following definitions
- * (Sense key: Aborted Command 0x0B).
- */
-#define ISCSI_DS_ERROR_PROTOCOL_SERVICE_CRC_ERROR_ASC  0x47
-
-/**
- * @brief DataSegment Error: Protocol Service CRC error.
- *
- * Certain iSCSI conditions result in the command being terminated at
- * the target (response code of Command Completed at Target) with a SCSI
- * CHECK CONDITION Status as outlined in the following definitions
- * (Sense key: Aborted Command 0x0B).
- */
-#define ISCSI_DS_ERROR_PROTOCOL_SERVICE_CRC_ERROR_ASCQ 0x05
-
-
-/**
- * @brief DataSegment Error: Selective Negative / Sequence Number Acknowledgment (SNACK) rejected.
- *
- * Certain iSCSI conditions result in the command being terminated at
- * the target (response code of Command Completed at Target) with a SCSI
- * CHECK CONDITION Status as outlined in the following definitions
- * (Sense key: Aborted Command 0x0B).
- */
-#define ISCSI_DS_ERROR_SNACK_REJECTED_ASC  0x11
-
-/**
- * @brief DataSegment Error: Selective Negative / Sequence Number Acknowledgment (SNACK) rejected.
- *
- * Certain iSCSI conditions result in the command being terminated at
- * the target (response code of Command Completed at Target) with a SCSI
- * CHECK CONDITION Status as outlined in the following definitions
- * (Sense key: Aborted Command 0x0B).
- */
-#define ISCSI_DS_ERROR_SNACK_REJECTED_ASCQ 0x13
-
-
-/**
- * @brief iSCSI header digest in case CRC32C has been negotiated.
- *
- * Optional header and data digests protect the integrity of the header
- * and data, respectively. The digests, if present, are located,
- * respectively, after the header and PDU-specific data and cover,
- * respectively, the header and the PDU data, each including the padding
- * bytes, if any.
- *
- * The existence and type of digests are negotiated during the Login
- * Phase.
- */
-typedef struct __attribute__((packed)) iscsi_header_digest {
-    /// Header digest is a CRC32C for ensuring integrity.
-    uint32_t crc32c;
-} iscsi_header_digest;
-
-/**
- * @brief iSCSI data digest in case CRC32C has been negotiated.
- *
- * Optional header and data digests protect the integrity of the header
- * and data, respectively. The digests, if present, are located,
- * respectively, after the header and PDU-specific data and cover,
- * respectively, the header and the PDU data, each including the padding
- * bytes, if any.
- *
- * The existence and type of digests are negotiated during the Login
- * Phase.
- */
-typedef struct __attribute__((packed)) iscsi_data_digest {
-    /// Data digest is a CRC32C for ensuring integrity.
-    uint32_t crc32c;
-} iscsi_data_digest;
-
-
 /**
  * @brief iSCSI SCSI CDB packet data structure.
  *
@@ -1177,11 +559,11 @@ typedef struct __attribute__((packed)) iscsi_data_digest {
  * MUST be used to contain the CDB spillover.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_cdb {
-    /// SCSI opcode.
-    uint8_t opcode;
+	/// SCSI opcode.
+	uint8_t opcode;
 
-    /// Additional op-code specific data.
-    uint8_t data[0];
+	/// Additional op-code specific data.
+	uint8_t data[0];
 } iscsi_scsi_cdb;
 
 
@@ -1198,20 +580,20 @@ typedef struct __attribute__((packed)) iscsi_scsi_cdb {
  * There are 6 bytes in the CDB field for this command.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_cdb_inquiry {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
+	/// SCSI opcode.
+	iscsi_scsi_cdb cdb;
 
-    /// Logical Unit Number (LUN), CMMDT and EVPD.
-    uint8_t lun_flags;
+	/// Logical Unit Number (LUN), CMMDT and EVPD.
+	uint8_t lun_flags;
 
-    /// Page code.
-    uint8_t page_code;
+	/// Page code.
+	uint8_t page_code;
 
-    /// Allocation length in bytes.
-    uint16_t alloc_len;
+	/// Allocation length in bytes.
+	uint16_t alloc_len;
 
-    /// Control.
-    uint8_t control;
+	/// Control.
+	uint8_t control;
 } iscsi_scsi_cdb_inquiry;
 
 
@@ -1221,17 +603,17 @@ typedef struct __attribute__((packed)) iscsi_scsi_cdb_inquiry {
  * There are 6 bytes in the CDB field for this command.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_cdb_read_write_6 {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
+	/// SCSI opcode.
+	iscsi_scsi_cdb cdb;
 
-    /// Logical Block Address (LBA).
-    uint8_t lba[3];
+	/// Logical Block Address (LBA).
+	uint8_t lba[3];
 
-    /// Transfer length in bytes.
-    uint8_t xfer_len;
+	/// Transfer length in bytes.
+	uint8_t xfer_len;
 
-    /// Control.
-    uint8_t control;
+	/// Control.
+	uint8_t control;
 } iscsi_scsi_cdb_read_write_6;
 
 
@@ -1241,23 +623,23 @@ typedef struct __attribute__((packed)) iscsi_scsi_cdb_read_write_6 {
  * There are 10 bytes in the CDB field for this command.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_cdb_read_write_10 {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
+	/// SCSI opcode.
+	iscsi_scsi_cdb cdb;
 
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Logical Block Address (LBA).
-    uint32_t lba;
+	/// Logical Block Address (LBA).
+	uint32_t lba;
 
-    /// Group number.
-    int8_t group_num;
+	/// Group number.
+	int8_t group_num;
 
-    /// Transfer length in bytes.
-    uint16_t xfer_len;
+	/// Transfer length in bytes.
+	uint16_t xfer_len;
 
-    /// Control.
-    uint8_t control;
+	/// Control.
+	uint8_t control;
 } iscsi_scsi_cdb_read_write_10;
 
 
@@ -1267,23 +649,23 @@ typedef struct __attribute__((packed)) iscsi_scsi_cdb_read_write_10 {
  * There are 12 bytes in the CDB field for this command.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_cdb_read_write_12 {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
+	/// SCSI opcode.
+	iscsi_scsi_cdb cdb;
 
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Logical Block Address (LBA).
-    uint32_t lba;
+	/// Logical Block Address (LBA).
+	uint32_t lba;
 
-    /// Transfer length in bytes.
-    uint32_t xfer_len;
+	/// Transfer length in bytes.
+	uint32_t xfer_len;
 
-    /// Restricted for MMC-6 and group number.
-    int8_t restrict_group_num;
+	/// Restricted for MMC-6 and group number.
+	int8_t restrict_group_num;
 
-    /// Control.
-    uint8_t control;
+	/// Control.
+	uint8_t control;
 } iscsi_scsi_cdb_read_write_12;
 
 
@@ -1293,23 +675,23 @@ typedef struct __attribute__((packed)) iscsi_scsi_cdb_read_write_12 {
  * There are 16 bytes in the CDB field for this command.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_cdb_read_write_16 {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
+	/// SCSI opcode.
+	iscsi_scsi_cdb cdb;
 
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Logical Block Address (LBA).
-    uint64_t lba;
+	/// Logical Block Address (LBA).
+	uint64_t lba;
 
-    /// Transfer length in bytes.
-    uint32_t xfer_len;
+	/// Transfer length in bytes.
+	uint32_t xfer_len;
 
-    /// Restricted for MMC-6 and group number.
-    int8_t restrict_group_num;
+	/// Restricted for MMC-6 and group number.
+	int8_t restrict_group_num;
 
-    /// Control.
-    uint8_t control;
+	/// Control.
+	uint8_t control;
 } iscsi_scsi_cdb_read_write_16;
 
 
@@ -1329,86 +711,32 @@ typedef struct __attribute__((packed)) iscsi_scsi_cdb_read_write_16 {
  * There are 12 bytes in the CDB field for this command.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_cdb_report_luns {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
+	/// SCSI opcode.
+	iscsi_scsi_cdb cdb;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint8_t reserved;
 
-    /// Select report.
-    uint8_t select_report;
+	/// Select report.
+	uint8_t select_report;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint16_t reserved2;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint16_t reserved2;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved3;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint8_t reserved3;
 
-    /// Allocation length in bytes.
-    uint32_t alloc_len;
+	/// Allocation length in bytes.
+	uint32_t alloc_len;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved4;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint8_t reserved4;
 
-    /// Control.
-    uint8_t control;
+	/// Control.
+	uint8_t control;
 } iscsi_scsi_cdb_report_luns;
 
 
-/// iSCSI SCSI Command Descriptor Block (CDB) for COMPARE AND WRITE command flags: Force Unit Access (FUA).
-#define ISCSI_SCSI_CDB_CMP_WRITE_FLAGS_FUA                  (1 << 3L)
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for COMPARE AND WRITE command flags: Disable Page Out (DPO).
-#define ISCSI_SCSI_CDB_CMP_WRITE_FLAGS_DPO                  (1 << 4L)
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for COMPARE AND WRITE command write protect flags: First bit of the three bits.
-#define ISCSI_SCSI_CDB_CMP_WRITE_FLAGS_WRPROTECT_FIRST_BIT  5
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for COMPARE AND WRITE command write protect flags: Last bit of the three bits.
-#define ISCSI_SCSI_CDB_CMP_WRITE_FLAGS_WRPROTECT_LAST_BIT   ((ISCSI_SCSI_CDB_CMP_WRITE_FLAGS_WRPROTECT_FIRST_BIT) + 3 - 1)
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for COMPARE AND WRITE command write protect flags: Bit mask.
-#define ISCSI_SCSI_CDB_CMP_WRITE_FLAGS_WRPROTECT_MASK       (ISCSI_BITS_GET_MASK(ISCSI_SCSI_CDB_CMP_WRITE_FLAGS_WRPROTECT_FIRST_BIT, ISCSI_SCSI_CDB_CMP_WRITE_FLAGS_WRPROTECT_LAST_BIT))
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for COMPARE AND WRITE command write protect flags: Extracts the write protect bits.
-#define ISCSI_SCSI_CDB_CMP_WRITE_FLAGS_GET_WRPROTECT(x)     (ISCSI_BITS_GET((x), ISCSI_SCSI_CDB_CMP_WRITE_FLAGS_WRPROTECT_FIRST_BIT, ISCSI_SCSI_CDB_CMP_WRITE_FLAGS_WRPROTECT_LAST_BIT))
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for COMPARE AND WRITE command write protect flags: Stores into the write protect bits.
-#define ISCSI_SCSI_CDB_CMP_WRITE_FLAGS_PUT_WRPROTECT(x)     (ISCSI_BITS_PUT((x), ISCSI_SCSI_CDB_CMP_WRITE_FLAGS_WRPROTECT_FIRST_BIT, ISCSI_SCSI_CDB_CMP_WRITE_FLAGS_WRPROTECT_LAST_BIT))
-
-
-/**
- * @brief iSCSI SCSI CDB packet data structure for SCSI COMPARE AND WRITE command.
- *
- * There are 16 bytes in the CDB field for this command.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_cdb_cmp_write {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
-
-    /// Flags.
-    int8_t flags;
-
-    /// Logical Block Address (LBA).
-    uint64_t lba;
-
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint16_t reserved;
-
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved2;
-
-    /// Number of blocks in bytes.
-    uint8_t num_blocks;
-
-    /// Restricted for MMC-6 and group number.
-    int8_t restrict_group_num;
-
-    /// Control.
-    uint8_t control;
-} iscsi_scsi_cdb_cmp_write;
-
-
 /// iSCSI SCSI Command Descriptor Block (CDB) for SERVICE ACTION IN(16) command service action: READ CAPACITY(16).
 #define ISCSI_SCSI_CDB_SERVICE_ACTION_IN_16_ACTION_READ_CAPACITY_16 0x10
 
@@ -1437,196 +765,26 @@ typedef struct __attribute__((packed)) iscsi_scsi_cdb_cmp_write {
  * There are 16 bytes in the CDB field for this command.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_cdb_service_action_in_16 {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
+	/// SCSI opcode.
+	iscsi_scsi_cdb cdb;
 
-    /// Service action.
-    uint8_t action;
+	/// Service action.
+	uint8_t action;
 
-    /// Logical Block Address (LBA), obselete by now.
-    uint64_t lba;
+	/// Logical Block Address (LBA), obselete by now.
+	uint64_t lba;
 
-    /// Allocation length in bytes.
-    uint32_t alloc_len;
+	/// Allocation length in bytes.
+	uint32_t alloc_len;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint8_t reserved;
 
-    /// Control.
-    uint8_t control;
+	/// Control.
+	uint8_t control;
 } iscsi_scsi_cdb_service_action_in_16;
 
 
-/**
- * @brief iSCSI SCSI CDB packet data structure for SCSI SYNCHRONIZE CACHE(10) command.
- *
- * There are 10 bytes in the CDB field for this command.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_cdb_sync_cache_10 {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
-
-    /// Flags.
-    int8_t flags;
-
-    /// Logical Block Address (LBA).
-    uint32_t lba;
-
-    /// Group number.
-    int8_t group_num;
-
-    /// Transfer length in bytes.
-    uint16_t xfer_len;
-
-    /// Control.
-    uint8_t control;
-} iscsi_scsi_cdb_sync_cache_10;
-
-
-/**
- * @brief iSCSI SCSI CDB packet data structure for SCSI SYNCHRONIZE CACHE(16) command.
- *
- * There are 16 bytes in the CDB field for this command.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_cdb_sync_cache_16 {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
-
-    /// Flags.
-    int8_t flags;
-
-    /// Logical Block Address (LBA).
-    uint64_t lba;
-
-    /// Transfer length in bytes.
-    uint32_t xfer_len;
-
-    /// Group number.
-    int8_t group_num;
-
-    /// Control.
-    uint8_t control;
-} iscsi_scsi_cdb_sync_cache_16;
-
-
-/**
- * @brief iSCSI SCSI CDB packet data structure for SCSI WRITE SAME(10) command.
- *
- * There are 10 bytes in the CDB field for this command.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_cdb_write_same_10 {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
-
-    /// Flags.
-    int8_t flags;
-
-    /// Logical Block Address (LBA).
-    uint32_t lba;
-
-    /// Group number.
-    int8_t group_num;
-
-    /// Transfer length in bytes.
-    uint16_t xfer_len;
-
-    /// Control.
-    uint8_t control;
-} iscsi_scsi_cdb_write_same_10;
-
-
-/**
- * @brief iSCSI SCSI CDB packet data structure for SCSI WRITE SAME(16) command.
- *
- * There are 16 bytes in the CDB field for this command.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_cdb_write_same_16 {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
-
-    /// Flags.
-    int8_t flags;
-
-    /// Logical Block Address (LBA).
-    uint64_t lba;
-
-    /// Transfer length in bytes.
-    uint32_t xfer_len;
-
-    /// Group number.
-    int8_t group_num;
-
-    /// Control.
-    uint8_t control;
-} iscsi_scsi_cdb_write_same_16;
-
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for MODE SELECT(6) command flags: Save Pages (SP).
-#define ISCSI_SCSI_CDB_MODE_SELECT_6_FLAGS_SP  (1 << 0)
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for MODE SELECT(6) command flags: Revert To Defaults (RTD).
-#define ISCSI_SCSI_CDB_MODE_SELECT_6_FLAGS_RTD (1 << 1)
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for MODE SELECT(6) command flags: Page Format (PF).
-#define ISCSI_SCSI_CDB_MODE_SELECT_6_FLAGS_PF  (1 << 4)
-
-
-/**
- * @brief iSCSI SCSI CDB packet data structure for SCSI MODE SELECT(6) command.
- *
- * There are 6 bytes in the CDB field for this command.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_cdb_mode_select_6 {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
-
-    /// Flags.
-    int8_t flags;
-
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint16_t reserved;
-
-    /// Parameter list length in bytes.
-    uint8_t param_list_len;
-
-    /// Control.
-    uint8_t control;
-} iscsi_scsi_cdb_mode_select_6;
-
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for MODE SELECT(10) command flags: Save Pages (SP).
-#define ISCSI_SCSI_CDB_MODE_SELECT_10_FLAGS_SP  (1 << 0)
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for MODE SELECT(10) command flags: Page Format (PF).
-#define ISCSI_SCSI_CDB_MODE_SELECT_10_FLAGS_PF  (1 << 4)
-
-
-/**
- * @brief iSCSI SCSI CDB packet data structure for SCSI MODE SELECT(10) command.
- *
- * There are 10 bytes in the CDB field for this command.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_cdb_mode_select_10 {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
-
-    /// Flags.
-    int8_t flags;
-
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint32_t reserved;
-
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved2;
-
-    /// Parameter list length in bytes.
-    uint16_t param_list_len;
-
-    /// Control.
-    uint8_t control;
-} iscsi_scsi_cdb_mode_select_10;
-
-
 /// iSCSI SCSI Command Descriptor Block (CDB) for MODE SENSE(6) command flags: Disable Block Descriptors (DBD).
 #define ISCSI_SCSI_CDB_MODE_SENSE_6_FLAGS_DBD (1 << 3)
 
@@ -1680,23 +838,23 @@ typedef struct __attribute__((packed)) iscsi_scsi_cdb_mode_select_10 {
  * There are 6 bytes in the CDB field for this command.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_cdb_mode_sense_6 {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
+	/// SCSI opcode.
+	iscsi_scsi_cdb cdb;
 
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Page code and page control.
-    uint8_t page_code_control;
+	/// Page code and page control.
+	uint8_t page_code_control;
 
-    /// Sub page code.
-    uint8_t sub_page_code;
+	/// Sub page code.
+	uint8_t sub_page_code;
 
-    /// Allocation length in bytes.
-    uint8_t alloc_len;
+	/// Allocation length in bytes.
+	uint8_t alloc_len;
 
-    /// Control.
-    uint8_t control;
+	/// Control.
+	uint8_t control;
 } iscsi_scsi_cdb_mode_sense_6;
 
 
@@ -1756,437 +914,32 @@ typedef struct __attribute__((packed)) iscsi_scsi_cdb_mode_sense_6 {
  * There are 10 bytes in the CDB field for this command.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_cdb_mode_sense_10 {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
+	/// SCSI opcode.
+	iscsi_scsi_cdb cdb;
 
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Page code and page control.
-    uint8_t page_code_control;
+	/// Page code and page control.
+	uint8_t page_code_control;
 
-    /// Sub page code.
-    uint8_t sub_page_code;
+	/// Sub page code.
+	uint8_t sub_page_code;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint16_t reserved;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint16_t reserved;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved2;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint8_t reserved2;
 
-    /// Allocation length in bytes.
-    uint16_t alloc_len;
+	/// Allocation length in bytes.
+	uint16_t alloc_len;
 
-    /// Control.
-    uint8_t control;
+	/// Control.
+	uint8_t control;
 } iscsi_scsi_cdb_mode_sense_10;
 
 
-/// iSCSI SCSI Command Descriptor Block (CDB) for REQUEST SENSE command flags: Descriptor Format (DESC).
-#define ISCSI_SCSI_CDB_REQ_SENSE_FLAGS_DESC (1 << 0)
-
-
-/**
- * @brief iSCSI SCSI CDB packet data structure for SCSI REQUEST SENSE command.
- *
- * There are 6 bytes in the CDB field for this command.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_cdb_req_sense {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
-
-    /// Flags.
-    int8_t flags;
-
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint16_t reserved;
-
-    /// Allocation length in bytes.
-    uint8_t alloc_len;
-
-    /// Control.
-    uint8_t control;
-} iscsi_scsi_cdb_req_sense;
-
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution flags: Reply immediately after CDB check (IMMED).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_EXEC_FLAGS_IMMED (1 << 0)
-
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution power condition modifier: Process the START and LOEJ bits.
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_PROC_START_LOEJ_BITS 0x0
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution power condition modifier: Cause the logical unit to transition to the active power condition (see SPC5).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_ACTIVE               0x0
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution power condition modifier: Cause the logical unit to transition to the idle_a power condition (see SPC5).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_IDLE_A               0x0
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution power condition modifier: Cause the logical unit to transition to the idle_b power condition (see SPC5).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_IDLE_B               0x1
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution power condition modifier: Cause the logical unit to transition to the idle_c power condition (see SPC5).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_IDLE_C               0x2
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution power condition modifier: Cause the logical unit to transition to the standby_z power condition (see SPC5).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_STANDBY_Z            0x0
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution power condition modifier: Cause the logical unit to transition to the standby_b power condition (see SPC5).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_STANDBY_Y            0x1
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution power condition modifier: Initialize and start all of the idle and standby condition timers that are enabled (see SPC5).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_LU_CONTROL           0x0
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution power condition modifier: Force the idle_a condition timer to be set to zero (see SPC5).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_FORCE_IDLE_A_0       0x0
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution power condition modifier: Force the idle_b condition timer to be set to zero (see SPC5).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_FORCE_IDLE_B_0       0x1
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution power condition modifier: Force the idle_c condition timer to be set to zero (see SPC5).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_FORCE_IDLE_C_0       0x2
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution power condition modifier: Force the standby_z condition timer to be set to zero (see SPC5).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_FORCE_STANDBY_Z_0    0x0
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution power condition modifier: Force the standby_y condition timer to be set to zero (see SPC5).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_FORCE_STANDBY_Y_0    0x1
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution power condition modifier: First bit of the four bits.
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_FIRST_BIT            0
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution power condition modifier: Last bit of the four bits.
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_LAST_BIT             ((ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_FIRST_BIT) + 4 - 1)
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution power condition modifier: Bit mask.
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_MASK                 (ISCSI_BITS_GET_MASK(ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_FIRST_BIT, ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_LAST_BIT))
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution power condition modifier: Extracts the power condition modifier bits.
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_GET_POWER_COND_MOD(x)               (ISCSI_BITS_GET((x), ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_FIRST_BIT, ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_LAST_BIT))
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution power condition modifier: Stores into the power condition modifier bits.
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_PUT_POWER_COND_MOD(x)               (ISCSI_BITS_PUT((x), ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_FIRST_BIT, ISCSI_SCSI_CDB_START_STOP_UNIT_POWER_COND_MOD_LAST_BIT))
-
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution flags: START.
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_START                      (1 << 0)
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution flags: LOad EJect (LOEJ).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_LOEJ                       (1 << 1)
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution flags: Do not flush caches until a power condition that prevents accessing the medium is entered (NO_FLUSH).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_NO_FLUSH                   (1 << 2)
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution flags power condition: Process the START and LOEJ bits (START_VALID).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_POWER_COND_START_VALID     0x0
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution flags power condition: Cause the logical unit to transition to the active power condition (see SPC5).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_POWER_COND_ACTIVE          0x1
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution flags power condition: Cause the logical unit to transition to the idle_a to idle_c power conditions (see SPC5).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_POWER_COND_IDLE            0x2
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution flags power condition: Cause the logical unit to transition to the standby_z and standby_y power conditions (see SPC5).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_POWER_COND_STANDBY         0x3
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution flags power condition: Obselete.
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_POWER_COND_OBSELETE        0x5
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution flags power condition: Initialize and start all of the idle and standby condition timers that are enabled (see SPC5).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_POWER_COND_LU_CONTROL      0x7
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution flags power condition: Force the idle_a to idle_c condition timers to be set to zero (see SPC5).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_POWER_COND_FORCE_IDLE_0    0xA
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution flags power condition: Force the standby_z and standby_y condition timers to be set to zero (see SPC5).
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_POWER_COND_FORCE_STANDBY_0 0xB
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution flags power condition: First bit of the four bits.
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_POWER_COND_FIRST_BIT       4
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution flags power condition: Last bit of the four bits.
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_POWER_COND_LAST_BIT        ((ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_POWER_COND_FIRST_BIT) + 8 - 1)
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution flags power condition: Bit mask.
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_POWER_COND_MASK            (ISCSI_BITS_GET_MASK(ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_POWER_COND_FIRST_BIT, ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_POWER_COND_LAST_BIT))
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution flags power condition: Extracts the power condition bits.
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_GET_POWER_COND(x)          (ISCSI_BITS_GET((x), ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_POWER_COND_FIRST_BIT, ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_POWER_COND_LAST_BIT))
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for START STOP UNIT command execution flags power condition: Stores into the power condition bits.
-#define ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_PUT_POWER_COND(x)          (ISCSI_BITS_PUT((x), ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_POWER_COND_FIRST_BIT, ISCSI_SCSI_CDB_START_STOP_UNIT_FLAGS_POWER_COND_LAST_BIT))
-
-
-/**
- * @brief iSCSI SCSI CDB packet data structure for SCSI START STOP UNIT command.
- *
- * There are 6 bytes in the CDB field for this command.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_cdb_start_stop_unit {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
-
-    /// Execution flags.
-    int8_t exec_flags;
-
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved;
-
-    /// Power condition modifier.
-    uint8_t power_cond_mod;
-
-    /// Flags.
-    int8_t flags;
-
-    /// Control.
-    uint8_t control;
-} iscsi_scsi_cdb_start_stop_unit;
-
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE OUT command service action: Register - Register a reservation key without making a reservation.
-#define ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_REGISTER                  0x00
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE OUT command service action: Reserve - Create a persistent reservation of the specified scope and type.
-#define ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_RESERVE                   0x01
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE OUT command service action: Release - Releases the selected reservation for the requesting initiator.
-#define ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_RELEASE                   0x02
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE OUT command service action: Clear – Clears all reservations keys and all persistent reservations.
-#define ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_CLEAR                     0x03
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE OUT command service action: Preempt – Preempt reservations from another initiator.
-#define ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_PREEMPT                   0x04
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE OUT command service action: Preempt reservations from another initiator and abort all tasks for all initiators with the specified reservation key.
-#define ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_PREEMPT_ABORT             0x05
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE OUT command service action: Register and Ignore Existing Key – Register a new reservation key and discard existing reservation key.
-#define ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_REGISTER_IGNORE_EXIST_KEY 0x06
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE OUT command service action: Register and Move Registers - Registers a reservation key for another I_T nexus and moves the persistent reservation to that I-T nexus.
-#define ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_REGISTER_MOVE_REGS        0x07
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE OUT command service action: First bit of the five bits.
-#define ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_FIRST_BIT                 0
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE OUT command service action: Last bit of the five bits.
-#define ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_LAST_BIT                  ((ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_FIRST_BIT) + 5 - 1)
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE OUT command service action: Bit mask.
-#define ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_MASK                      (ISCSI_BITS_GET_MASK(ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_FIRST_BIT, ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_LAST_BIT))
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE OUT command service action: Extracts the service action bits.
-#define ISCSI_SCSI_CDB_PR_RESERVE_OUT_GET_ACTION(x)                    (ISCSI_BITS_GET((x), ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_FIRST_BIT, ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_LAST_BIT))
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE OUT command service action: Stores into the service action bits.
-#define ISCSI_SCSI_CDB_PR_RESERVE_OUT_PUT_ACTION(x)                    (ISCSI_BITS_PUT((x), ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_FIRST_BIT, ISCSI_SCSI_CDB_PR_RESERVE_OUT_ACTION_LAST_BIT))
-
-
-/**
- * @brief iSCSI SCSI CDB packet data structure for SCSI PERSISTENT RESERVE OUT command.
- *
- * There are 10 bytes in the CDB field for this command.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_cdb_pr_reserve_out {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
-
-    /// Service action.
-    uint8_t action;
-
-    /// Scope and reservation type.
-    uint8_t scope_type;
-
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint16_t reserved;
-
-    /// Parameter list length in bytes.
-    uint32_t param_list_len;
-
-    /// Control.
-    uint8_t control;
-} iscsi_scsi_cdb_pr_reserve_out;
-
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE IN command service action: Read keys - Reads all registered reservation keys (i.e. registrations) as described in SPC5.
-#define ISCSI_SCSI_CDB_PR_RESERVE_IN_ACTION_READ_KEYS                0x00
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE IN command service action: Read reservations - Reads the current persistent reservations as described in SPC5.
-#define ISCSI_SCSI_CDB_PR_RESERVE_IN_ACTION_READ_RESERVATIONS        0x01
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE IN command service action: Report capabilities - Returns capability information.
-#define ISCSI_SCSI_CDB_PR_RESERVE_IN_ACTION_READ_REPORT_CAPABILITIES 0x02
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE IN command service action: Read full status – Reads complete information about all registrations and the persistent reservations, if any.
-#define ISCSI_SCSI_CDB_PR_RESERVE_IN_ACTION_READ_FULL_STATUS         0x03
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE IN command service action: First bit of the five bits.
-#define ISCSI_SCSI_CDB_PR_RESERVE_IN_ACTION_FIRST_BIT                0
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE IN command service action: Last bit of the five bits.
-#define ISCSI_SCSI_CDB_PR_RESERVE_IN_ACTION_LAST_BIT                 ((ISCSI_SCSI_CDB_PR_RESERVE_IN_ACTION_FIRST_BIT) + 5 - 1)
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE IN command service action: Bit mask.
-#define ISCSI_SCSI_CDB_PR_RESERVE_IN_ACTION_MASK                     (ISCSI_BITS_GET_MASK(ISCSI_SCSI_CDB_PR_RESERVE_IN_ACTION_FIRST_BIT, ISCSI_SCSI_CDB_PR_RESERVE_IN_ACTION_LAST_BIT))
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE IN command service action: Extracts the service action bits.
-#define ISCSI_SCSI_CDB_PR_RESERVE_IN_GET_ACTION(x)                   (ISCSI_BITS_GET((x), ISCSI_SCSI_CDB_PR_RESERVE_IN_ACTION_FIRST_BIT, ISCSI_SCSI_CDB_PR_RESERVE_IN_ACTION_LAST_BIT))
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for PERSISTENT RESERVE IN command service action: Stores into the service action bits.
-#define ISCSI_SCSI_CDB_PR_RESERVE_IN_PUT_ACTION(x)                   (ISCSI_BITS_PUT((x), ISCSI_SCSI_CDB_PR_RESERVE_IN_ACTION_FIRST_BIT, ISCSI_SCSI_CDB_PR_RESERVE_IN_ACTION_LAST_BIT))
-
-
-/**
- * @brief iSCSI SCSI CDB packet data structure for SCSI PERSISTENT RESERVE IN command.
- *
- * There are 10 bytes in the CDB field for this command.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_cdb_pr_reserve_in {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
-
-    /// Service action.
-    uint8_t action;
-
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint32_t reserved;
-
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved2;
-
-    /// Parameter list length in bytes.
-    uint16_t param_list_len;
-
-    /// Control.
-    uint8_t control;
-} iscsi_scsi_cdb_pr_reserve_in;
-
-
-/**
- * @brief iSCSI SCSI CDB packet data structure for SCSI RESERVE(6) command.
- *
- * There are 6 bytes in the CDB field for this command.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_cdb_pr_reserve_6 {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
-
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved_obselete;
-
-    /// Obselete byte.
-    uint8_t obselete;
-
-    /// Obselete word.
-    uint16_t obselete2;
-
-    /// Control.
-    uint8_t control;
-} iscsi_scsi_cdb_pr_reserve_6;
-
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for RESERVE(10) command flags: Long identifier larger than 255 (LONGID).
-#define ISCSI_SCSI_CDB_RESERVE_10_FLAGS_LONGID (1 << 1)
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for RESERVE(10) command flags: Third-party reservation (3RDPTY).
-#define ISCSI_SCSI_CDB_RESERVE_10_FLAGS_3RDPTY (1 << 4)
-
-
-/**
- * @brief iSCSI SCSI CDB packet data structure for SCSI RESERVE(10) command.
- *
- * There are 10 bytes in the CDB field for this command.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_cdb_pr_reserve_10 {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
-
-    /// Flags.
-    int8_t flags;
-
-    /// Obselete.
-    uint8_t obselete;
-
-    /// Third-party device identifier.
-    uint8_t third_party_dev_id;
-
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint16_t reserved;
-
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved2;
-
-    /// Parameter list length in bytes.
-    uint16_t param_list_len;
-
-    /// Control.
-    uint8_t control;
-} iscsi_scsi_cdb_pr_reserve_10;
-
-
-/**
- * @brief iSCSI SCSI CDB packet data structure for SCSI RELEASE(6) command.
- *
- * There are 6 bytes in the CDB field for this command.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_cdb_pr_release_6 {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
-
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved_obselete;
-
-    /// Obselete byte.
-    uint8_t obselete;
-
-    /// Obselete word.
-    uint16_t obselete2;
-
-    /// Control.
-    uint8_t control;
-} iscsi_scsi_cdb_pr_release_6;
-
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for RELEASE(10) command flags: Long identifier larger than 255 (LONGID).
-#define ISCSI_SCSI_CDB_RELEASE_10_FLAGS_LONGID (1 << 1)
-
-/// iSCSI SCSI Command Descriptor Block (CDB) for RELEASE(10) command flags: Third-party reservation (3RDPTY).
-#define ISCSI_SCSI_CDB_RELEASE_10_FLAGS_3RDPTY (1 << 4)
-
-
-/**
- * @brief iSCSI SCSI CDB packet data structure for SCSI RELEASE(10) command.
- *
- * There are 10 bytes in the CDB field for this command.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_cdb_pr_release_10 {
-    /// SCSI opcode.
-    iscsi_scsi_cdb cdb;
-
-    /// Flags.
-    int8_t flags;
-
-    /// Obselete.
-    uint8_t obselete;
-
-    /// Third-party device identifier.
-    uint8_t third_party_dev_id;
-
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint16_t reserved;
-
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved2;
-
-    /// Parameter list length in bytes.
-    uint16_t param_list_len;
-
-    /// Control.
-    uint8_t control;
-} iscsi_scsi_cdb_pr_release_10;
-
-
 /**
  * @brief iSCSI SCSI DataSegment Command packet structure.
  *
@@ -2199,14 +952,14 @@ typedef struct __attribute__((packed)) iscsi_scsi_cdb_pr_release_10 {
  * contain a vendor-specific detailed description of the failure).
  */
 typedef struct __attribute__((packed)) iscsi_scsi_ds_cmd_data {
-    /// SenseLength: This field indicates the length of Sense Data.
-    uint16_t len;
+	/// SenseLength: This field indicates the length of Sense Data.
+	uint16_t len;
 
-    /// The Sense Data contains detailed information about a CHECK CONDITION. SPC3 specifies the format and content of the Sense Data.
-    uint8_t sense_data[0];
+	/// The Sense Data contains detailed information about a CHECK CONDITION. SPC3 specifies the format and content of the Sense Data.
+	uint8_t sense_data[0];
 
-    /// Response Data.
-    uint8_t res_data[0];
+	/// Response Data.
+	uint8_t res_data[0];
 } iscsi_scsi_ds_cmd_data;
 
 
@@ -2414,20 +1167,20 @@ typedef struct __attribute__((packed)) iscsi_scsi_ds_cmd_data {
  * cleared.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_basic_inquiry_data_packet {
-    /// Peripheral device type and qualifier.
-    uint8_t peripheral_type_id;
+	/// Peripheral device type and qualifier.
+	uint8_t peripheral_type_id;
 
-    /// Peripheral device type modifier and removable media bit.
-    int8_t peripheral_type_mod_flags;
+	/// Peripheral device type modifier and removable media bit.
+	int8_t peripheral_type_mod_flags;
 
-    /// ANSI-Approved, ECMA and ISO version.
-    uint8_t version;
+	/// ANSI-Approved, ECMA and ISO version.
+	uint8_t version;
 
-    /// Response data format, HISUP, NORMACA, AENC and TrmIOP flags.
-    int8_t response_data_fmt_flags;
+	/// Response data format, HISUP, NORMACA, AENC and TrmIOP flags.
+	int8_t response_data_fmt_flags;
 
-    /// Additional length in bytes.
-    uint8_t add_len;
+	/// Additional length in bytes.
+	uint8_t add_len;
 } iscsi_scsi_basic_inquiry_data_packet;
 
 
@@ -2503,26 +1256,26 @@ typedef struct __attribute__((packed)) iscsi_scsi_basic_inquiry_data_packet {
  * cleared.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_std_inquiry_data_packet {
-    /// iSCSI SCSI basic inquiry data packet.
-    iscsi_scsi_basic_inquiry_data_packet basic_inquiry;
+	/// iSCSI SCSI basic inquiry data packet.
+	iscsi_scsi_basic_inquiry_data_packet basic_inquiry;
 
-    /// PROTECT, 3PC, TPGS, ACC and SCCS.
-    uint8_t tpgs_flags;
+	/// PROTECT, 3PC, TPGS, ACC and SCCS.
+	uint8_t tpgs_flags;
 
-    /// MULTIP, VS and ENCSERV.
-    int8_t services_flags;
+	/// MULTIP, VS and ENCSERV.
+	int8_t services_flags;
 
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Vendor identification.
-    uint8_t vendor_id[8];
+	/// Vendor identification.
+	uint8_t vendor_id[8];
 
-    /// Product identification.
-    uint8_t product_id[16];
+	/// Product identification.
+	uint8_t product_id[16];
 
-    /// Product revision level.
-    uint8_t product_rev_level[4];
+	/// Product revision level.
+	uint8_t product_rev_level[4];
 } iscsi_scsi_std_inquiry_data_packet;
 
 
@@ -2551,29 +1304,29 @@ typedef struct __attribute__((packed)) iscsi_scsi_std_inquiry_data_packet {
  * cleared.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_ext_inquiry_data_packet {
-    /// iSCSI SCSI standard inquiry data packet.
-    iscsi_scsi_std_inquiry_data_packet std_inquiry;
+	/// iSCSI SCSI standard inquiry data packet.
+	iscsi_scsi_std_inquiry_data_packet std_inquiry;
 
-    /// Vendor specific.
-    uint8_t vendor_spec[20];
+	/// Vendor specific.
+	uint8_t vendor_spec[20];
 
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Reserved for future usage (always MUST be 0).
-    uint8_t reserved;
+	/// Reserved for future usage (always MUST be 0).
+	uint8_t reserved;
 
-    /// Version descriptors.
-    uint16_t version_desc[8];
+	/// Version descriptors.
+	uint16_t version_desc[8];
 
-    /// Reserved for future usage (always MUST be 0).
-    uint64_t reserved2[2];
+	/// Reserved for future usage (always MUST be 0).
+	uint64_t reserved2[2];
 
-    /// Reserved for future usage (always MUST be 0).
-    uint32_t reserved3;
+	/// Reserved for future usage (always MUST be 0).
+	uint32_t reserved3;
 
-    /// Reserved for future usage (always MUST be 0).
-    uint16_t reserved4;
+	/// Reserved for future usage (always MUST be 0).
+	uint16_t reserved4;
 } iscsi_scsi_ext_inquiry_data_packet;
 
 
@@ -2699,17 +1452,17 @@ typedef struct __attribute__((packed)) iscsi_scsi_ext_inquiry_data_packet {
  * set.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_vpd_page_inquiry_data_packet {
-    /// Peripheral device type and qualifier.
-    uint8_t peripheral_type_id;
+	/// Peripheral device type and qualifier.
+	uint8_t peripheral_type_id;
 
-    /// Page code.
-    uint8_t page_code;
+	/// Page code.
+	uint8_t page_code;
 
-    /// Allocation length in bytes.
-    uint16_t alloc_len;
+	/// Allocation length in bytes.
+	uint16_t alloc_len;
 
-    /// Parameters.
-    uint8_t params[0];
+	/// Parameters.
+	uint8_t params[0];
 } iscsi_scsi_vpd_page_inquiry_data_packet;
 
 
@@ -2834,20 +1587,20 @@ typedef struct __attribute__((packed)) iscsi_scsi_vpd_page_inquiry_data_packet {
  * set.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_vpd_page_design_desc_inquiry_data_packet {
-    /// Protocol identifier and code set.
-    uint8_t protocol_id_code_set;
+	/// Protocol identifier and code set.
+	uint8_t protocol_id_code_set;
 
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Reserved for future usage (always MUST be 0).
-    uint8_t reserved;
+	/// Reserved for future usage (always MUST be 0).
+	uint8_t reserved;
 
-    /// Length in bytes.
-    uint8_t len;
+	/// Length in bytes.
+	uint8_t len;
 
-    /// Designation descriptor.
-    uint8_t desc[0];
+	/// Designation descriptor.
+	uint8_t desc[0];
 } iscsi_scsi_vpd_page_design_desc_inquiry_data_packet;
 
 
@@ -2859,8 +1612,8 @@ typedef struct __attribute__((packed)) iscsi_scsi_vpd_page_design_desc_inquiry_d
  * set.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_vpd_page_design_desc_ieee_naa_ext_inquiry_data_packet {
-    /// IEEE NAA Extended.
-    uint64_t ieee_naa_ext;
+	/// IEEE NAA Extended.
+	uint64_t ieee_naa_ext;
 } iscsi_scsi_vpd_page_design_desc_ieee_naa_ext_inquiry_data_packet;
 
 
@@ -2872,14 +1625,14 @@ typedef struct __attribute__((packed)) iscsi_scsi_vpd_page_design_desc_ieee_naa_
  * set.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_vpd_page_design_desc_t10_vendor_id_inquiry_data_packet {
-    /// Vendor identification.
-    uint8_t vendor_id[8];
+	/// Vendor identification.
+	uint8_t vendor_id[8];
 
-    /// Product identification.
-    uint8_t product_id[16];
+	/// Product identification.
+	uint8_t product_id[16];
 
-    /// Unit serial number.
-    uint8_t unit_serial_num[32];
+	/// Unit serial number.
+	uint8_t unit_serial_num[32];
 } iscsi_scsi_vpd_page_design_desc_t10_vendor_id_inquiry_data_packet;
 
 
@@ -2891,11 +1644,11 @@ typedef struct __attribute__((packed)) iscsi_scsi_vpd_page_design_desc_t10_vendo
  * set.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_vpd_page_design_desc_rel_target_port_inquiry_data_packet {
-    /// Reserved for future usage (always MUST be 0).
-    uint16_t reserved;
+	/// Reserved for future usage (always MUST be 0).
+	uint16_t reserved;
 
-    /// Port index.
-    uint16_t index;
+	/// Port index.
+	uint16_t index;
 } iscsi_scsi_vpd_page_design_desc_rel_target_port_inquiry_data_packet;
 
 
@@ -2907,11 +1660,11 @@ typedef struct __attribute__((packed)) iscsi_scsi_vpd_page_design_desc_rel_targe
  * set.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_vpd_page_design_desc_target_port_group_inquiry_data_packet {
-    /// Reserved for future usage (always MUST be 0).
-    uint16_t reserved;
+	/// Reserved for future usage (always MUST be 0).
+	uint16_t reserved;
 
-    /// Port group index.
-    uint16_t index;
+	/// Port group index.
+	uint16_t index;
 } iscsi_scsi_vpd_page_design_desc_target_port_group_inquiry_data_packet;
 
 
@@ -2923,11 +1676,11 @@ typedef struct __attribute__((packed)) iscsi_scsi_vpd_page_design_desc_target_po
  * set.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_vpd_page_design_desc_logical_unit_group_inquiry_data_packet {
-    /// Reserved for future usage (always MUST be 0).
-    uint16_t reserved;
+	/// Reserved for future usage (always MUST be 0).
+	uint16_t reserved;
 
-    /// Logical unit identifier.
-    uint16_t id;
+	/// Logical unit identifier.
+	uint16_t id;
 } iscsi_scsi_vpd_page_design_desc_logical_unit_group_inquiry_data_packet;
 
 
@@ -3075,296 +1828,47 @@ typedef struct __attribute__((packed)) iscsi_scsi_vpd_page_design_desc_logical_u
  * set.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_vpd_page_ext_inquiry_data_packet {
-    /// Peripheral device type and qualifier.
-    uint8_t peripheral_type_id;
+	/// Peripheral device type and qualifier.
+	uint8_t peripheral_type_id;
 
-    /// Page code.
-    uint8_t page_code;
+	/// Page code.
+	uint8_t page_code;
 
-    /// Reserved for future usage (always MUST be 0).
-    uint8_t reserved;
+	/// Reserved for future usage (always MUST be 0).
+	uint8_t reserved;
 
-    /// Page length in bytes.
-    uint8_t page_len;
+	/// Page length in bytes.
+	uint8_t page_len;
 
-    /// Check flags.
-    int8_t check_flags;
+	/// Check flags.
+	int8_t check_flags;
 
-    /// Support flags.
-    int8_t support_flags;
+	/// Support flags.
+	int8_t support_flags;
 
-    /// More support flags.
-    int8_t support_flags_2;
+	/// More support flags.
+	int8_t support_flags_2;
 
-    /// LUICLR.
-    uint8_t luiclr;
+	/// LUICLR.
+	uint8_t luiclr;
 
-    /// CBCS.
-    uint8_t cbcs;
+	/// CBCS.
+	uint8_t cbcs;
 
-    /// Micro DL.
-    uint8_t micro_dl;
+	/// Micro DL.
+	uint8_t micro_dl;
 
-    /// Reserved for future usage (always MUST be 0).
-    uint64_t reserved2[6];
+	/// Reserved for future usage (always MUST be 0).
+	uint64_t reserved2[6];
 
-    /// Reserved for future usage (always MUST be 0).
-    uint32_t reserved3;
+	/// Reserved for future usage (always MUST be 0).
+	uint32_t reserved3;
 
-    /// Reserved for future usage (always MUST be 0).
-    uint16_t reserved4;
+	/// Reserved for future usage (always MUST be 0).
+	uint16_t reserved4;
 } iscsi_scsi_vpd_page_ext_inquiry_data_packet;
 
 
-/// iSCSI SCSI Vital Product Data (VPD) Mode Page Policy Descriptor Inquiry Data policy page code: First bit of the six bits.
-#define ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_POLICY_PAGE_CODE_FIRST_BIT 0
-
-/// iSCSI SCSI Vital Product Data (VPD) Mode Page Policy Descriptor Inquiry Data policy page code: Last bit of the six bits.
-#define ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_POLICY_PAGE_CODE_LAST_BIT  ((ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_POLICY_PAGE_CODE_FIRST_BIT) + 6 - 1)
-
-/// iSCSI SCSI Vital Product Data (VPD) Mode Page Policy Descriptor Inquiry Data policy page code: Bit mask.
-#define ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_POLICY_PAGE_CODE_MASK      (ISCSI_BITS_GET_MASK(ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_POLICY_PAGE_CODE_FIRST_BIT, ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_POLICY_PAGE_CODE_LAST_BIT))
-
-/// iSCSI SCSI Vital Product Data (VPD) Mode Page Policy Descriptor Inquiry Data policy page code: Extracts the policy page code bits.
-#define ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_GET_POLICY_PAGE_CODE(x)    (ISCSI_BITS_GET((x), ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_POLICY_PAGE_CODE_FIRST_BIT, ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_POLICY_PAGE_CODE_LAST_BIT))
-
-/// iSCSI SCSI Vital Product Data (VPD) Mode Page Policy Descriptor Inquiry Data policy page code: Stores into the policy page code bits.
-#define ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_PUT_POLICY_PAGE_CODE(x)    (ISCSI_BITS_PUT((x), ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_POLICY_PAGE_CODE_FIRST_BIT, ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_POLICY_PAGE_CODE_LAST_BIT))
-
-
-/// iSCSI SCSI Vital Product Data (VPD) Mode Page Policy Descriptor Inquiry Data flags mode page policy: First bit of the two bits.
-#define ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_FLAGS_MODE_PAGE_POLICY_FIRST_BIT 0
-
-/// iSCSI SCSI Vital Product Data (VPD) Mode Page Policy Descriptor Inquiry Data flags mode page policy: Last bit of the two bits.
-#define ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_FLAGS_MODE_PAGE_POLICY_LAST_BIT  ((ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_FLAGS_MODE_PAGE_POLICY_FIRST_BIT) + 2 - 1)
-
-/// iSCSI SCSI Vital Product Data (VPD) Mode Page Policy Descriptor Inquiry Data flags mode page policy: Bit mask.
-#define ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_FLAGS_MODE_PAGE_POLICY_MASK      (ISCSI_BITS_GET_MASK(ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_FLAGS_MODE_PAGE_POLICY_FIRST_BIT, ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_FLAGS_MODE_PAGE_POLICY_LAST_BIT))
-
-/// iSCSI SCSI Vital Product Data (VPD) Mode Page Policy Descriptor Inquiry Data flags mode page policy: Extracts the mode page policy bits.
-#define ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_FLAGS_GET_MODE_PAGE_POLICY(x)    (ISCSI_BITS_GET((x), ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_FLAGS_MODE_PAGE_POLICY_FIRST_BIT, ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_FLAGS_MODE_PAGE_POLICY_LAST_BIT))
-
-/// iSCSI SCSI Vital Product Data (VPD) Mode Page Policy Descriptor Inquiry Data flags mode page policy: Stores into the mode page policy bits.
-#define ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_FLAGS_PUT_MODE_PAGE_POLICY(x)    (ISCSI_BITS_PUT((x), ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_FLAGS_MODE_PAGE_POLICY_FIRST_BIT, ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_FLAGS_MODE_PAGE_POLICY_LAST_BIT))
-
-/// iSCSI SCSI Vital Product Data (VPD) Mode Page Policy Descriptor Inquiry Data flag: Multiple Logical Units Share (MLUS).
-#define ISCSI_SCSI_VPD_MODE_PAGE_POLICY_DESC_INQUIRY_DATA_FLAGS_MLUS                        (1 << 7)
-
-
-/**
- * @brief iSCSI SCSI Vital Product Data (VPD) Mode Page Policy Descriptor Inquiry data packet.
- *
- * This structure is used by the SCSI INQUIRY command
- * in order to fill in the result if the EVPD bit is
- * set.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_vpd_mode_page_policy_desc_inquiry_data_packet {
-    /// Policy page code.
-    uint8_t page_code;
-
-    /// Policy sub page code.
-    uint8_t sub_page_code;
-
-    /// Policy flags.
-    int8_t flags;
-
-    /// Reserved for future usage (always MUST be 0).
-    uint8_t reserved;
-} iscsi_scsi_vpd_mode_page_policy_desc_inquiry_data_packet;
-
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data protocol identifier: iSCSI.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_PROTOCOL_ID_ISCSI     0x05
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data protocol identifier: First bit of the four bits.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_PROTOCOL_ID_FIRST_BIT 0
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data protocol identifier: Last bit of the four bits.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_PROTOCOL_ID_LAST_BIT  ((ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_PROTOCOL_ID_FIRST_BIT) + 4 - 1)
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data protocol identifier: Bit mask.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_PROTOCOL_ID_MASK      (ISCSI_BITS_GET_MASK(ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_PROTOCOL_ID_FIRST_BIT, ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_PROTOCOL_ID_LAST_BIT))
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data protocol identifier: Extracts the protocol identifier bits.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_GET_PROTOCOL_ID(x)    (ISCSI_BITS_GET((x), ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_PROTOCOL_ID_FIRST_BIT, ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_PROTOCOL_ID_LAST_BIT))
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data protocol identifier: Stores into the protocol identifier bits.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_PUT_PROTOCOL_ID(x)    (ISCSI_BITS_PUT((x), ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_PROTOCOL_ID_FIRST_BIT, ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_PROTOCOL_ID_LAST_BIT))
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data code set: Binary encoding.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_CODE_SET_BINARY       0x01
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data code set: ASCII encoding.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_CODE_SET_ASCII        0x02
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data code set: UTF-8 encoding.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_CODE_SET_UTF8         0x03
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data code set: First bit of the four bits.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_CODE_SET_FIRST_BIT    4
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data code set: Last bit of the four bits.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_CODE_SET_LAST_BIT     ((ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_CODE_SET_FIRST_BIT) + 8 - 1)
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data code set: Bit mask.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_CODE_SET_MASK         (ISCSI_BITS_GET_MASK(ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_CODE_SET_FIRST_BIT, ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_CODE_SET_LAST_BIT))
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data code set: Extracts the protocol identifier bits.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_GET_CODE_SET(x)       (ISCSI_BITS_GET((x), ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_CODE_SET_FIRST_BIT, ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_CODE_SET_LAST_BIT))
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data code set: Stores into the protocol identifier bits.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_PUT_CODE_SET(x)       (ISCSI_BITS_PUT((x), ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_CODE_SET_FIRST_BIT, ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_CODE_SET_LAST_BIT))
-
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags type: Vendor specific.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_VENDOR_SPEC        0x00
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags type: T10 vendor identifier.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_T10_VENDOR_ID      0x01
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags type: EUI64.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_EUI64              0x02
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags type: NAA.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_NAA                0x03
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags type: Relative target port.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_REL_TARGET_PORT    0x04
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags type: Target port group.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_TARGET_PORT_GROUP  0x05
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags type: Logical unit group.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_LOGICAL_UNIT_GROUP 0x06
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags type: MD5 logical unit.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_MD5_LOGICAL_UNIT   0x07
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags type: SCSI name.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_SCSI_NAME          0x08
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags type: First bit of the four bits.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_FIRST_BIT          0
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags type: Last bit of the four bits.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_LAST_BIT           ((ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_FIRST_BIT) + 4 - 1)
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags type: Bit mask.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_MASK               (ISCSI_BITS_GET_MASK(ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_FIRST_BIT, ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_LAST_BIT))
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags type: Extracts the type bits.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_GET_TYPE(x)             (ISCSI_BITS_GET((x), ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_FIRST_BIT, ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_LAST_BIT))
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags type: Stores into the type bits.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_PUT_TYPE(x)             (ISCSI_BITS_PUT((x), ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_FIRST_BIT, ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_TYPE_LAST_BIT))
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags association: Logical unit.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_LOGICAL_UNIT      0x0
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags association: Target port.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_TARGET_PORT       0x1
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags association: Target device.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_TARGET_DEVICE     0x2
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags association: First bit of the two bits.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_FIRST_BIT         4
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags association: Last bit of the two bits.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_LAST_BIT          ((ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_FIRST_BIT) + 6 - 1)
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags association: Bit mask.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_MASK              (ISCSI_BITS_GET_MASK(ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_FIRST_BIT, ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_LAST_BIT))
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags association: Extracts the association bits.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_GET_ASSOC(x)            (ISCSI_BITS_GET((x), ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_FIRST_BIT, ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_LAST_BIT))
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags association: Stores into the association bits.
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_PUT_ASSOC(x)            (ISCSI_BITS_PUT((x), ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_FIRST_BIT, ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_ASSOC_LAST_BIT))
-
-/// iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data flags: Protocol Identifier Valid (PIV).
-#define ISCSI_SCSI_VPD_SCSI_TARGET_PORT_DESIGN_DESC_INQUIRY_DATA_FLAGS_PIV                     (1 << 7)
-
-
-/**
- * @brief iSCSI SCSI Vital Product Data (VPD) SCSI Target Port Designation Descriptor Inquiry data packet.
- *
- * This structure is used by the SCSI INQUIRY command
- * in order to fill in the result if the EVPD bit is
- * set.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_vpd_scsi_target_port_design_dec_inquiry_data_packet {
-    /// Protocol identifier and code set.
-    uint8_t protocol_id_code_set;
-
-    /// Flags.
-    int8_t flags;
-
-    /// Reserved for future usage (always MUST be 0).
-    uint8_t reserved;
-
-    /// Length in bytes.
-    uint8_t len;
-
-    /// Designator.
-    uint8_t design[0];
-} iscsi_scsi_vpd_scsi_target_port_design_dec_inquiry_data_packet;
-
-
-/**
- * @brief iSCSI SCSI Vital Product Data (VPD) SCSI Port Designation Descriptor Inquiry data packet.
- *
- * This structure is used by the SCSI INQUIRY command
- * in order to fill in the result if the EVPD bit is
- * set.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_vpd_scsi_port_design_dec_inquiry_data_packet {
-    /// Reserved for future usage (always MUST be 0).
-    uint16_t reserved;
-
-    /// Relative port identifier.
-    uint16_t rel_port_id;
-
-    /// Reserved for future usage (always MUST be 0).
-    uint16_t reserved2;
-
-    /// Initiator port length in bytes.
-    uint16_t init_port_len;
-
-    /// Initiator port identifier.
-    uint16_t init_port_id[0];
-
-    /// Reserved for future usage (always MUST be 0).
-    uint16_t reserved3;
-
-    /// SCSI Target Port Designation Descriptor length in bytes.
-    uint16_t target_desc_len;
-
-    /// SCSI Target Port Designation Descriptor.
-    iscsi_scsi_vpd_scsi_target_port_design_dec_inquiry_data_packet target_desc[0];
-} iscsi_scsi_vpd_scsi_port_design_dec_inquiry_data_packet;
-
-
-/**
- * @brief iSCSI SCSI command INQUIRY Vital Product Data (VPD) SCSI Port Designation Descriptor entry fill.
- *
- * This structure is used by iterating through
- * all iSCSI device ports in order to fill in
- * the INQUIRY Vital Product Data (VPD) SCSI
- * Port Designation Descriptor structure.
- */
-typedef struct iscsi_scsi_emu_primary_inquiry_ports_fill {
-    /// Pointer to current Vital Product Data (VPD) SCSI Port Designation Descriptor entry packet data.
-    iscsi_scsi_vpd_scsi_port_design_dec_inquiry_data_packet *port_entry;
-
-    /// Total length of Vital Product Data (VPD) SCSI Port Designation Descriptor entry packet data in bytes.
-    uint alloc_len;
-
-    /// Total remaining allocation length for packet data in bytes.
-    uint len;
-} iscsi_scsi_emu_primary_inquiry_ports_fill;
-
-
 /// iSCSI SCSI Vital Product Data (VPD) Page Block Limits Inquiry data UNMAP Granularity Alignment: First bit of the thirty one bits.
 #define ISCSI_SCSI_VPD_PAGE_BLOCK_LIMITS_INQUIRY_DATA_UNMAP_GRANULARITY_ALIGN_FIRST_BIT 0L
 
@@ -3392,44 +1896,44 @@ typedef struct iscsi_scsi_emu_primary_inquiry_ports_fill {
  * set.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_vpd_page_block_limits_inquiry_data_packet {
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Maximum COMPARE AND WRITE length in logical blocks.
-    uint8_t max_cmp_write_len;
+	/// Maximum COMPARE AND WRITE length in logical blocks.
+	uint8_t max_cmp_write_len;
 
-    /// Optimal transfer length granularity in logical blocks.
-    uint16_t optimal_granularity_xfer_len;
+	/// Optimal transfer length granularity in logical blocks.
+	uint16_t optimal_granularity_xfer_len;
 
-    /// Maximum transfer length in logical blocks.
-    uint32_t max_xfer_len;
+	/// Maximum transfer length in logical blocks.
+	uint32_t max_xfer_len;
 
-    /// Optimal transfer length in logical blocks.
-    uint32_t optimal_xfer_len;
+	/// Optimal transfer length in logical blocks.
+	uint32_t optimal_xfer_len;
 
-    /// Maximum prefetch length in logical blocks.
-    uint32_t max_prefetch_len;
+	/// Maximum prefetch length in logical blocks.
+	uint32_t max_prefetch_len;
 
-    /// Maximum UNMAP LBA count in LBAs.
-    uint32_t max_unmap_lba_cnt;
+	/// Maximum UNMAP LBA count in LBAs.
+	uint32_t max_unmap_lba_cnt;
 
-    /// Maximum UNMAP block descriptor count in block descriptors.
-    uint32_t max_unmap_block_desc_cnt;
+	/// Maximum UNMAP block descriptor count in block descriptors.
+	uint32_t max_unmap_block_desc_cnt;
 
-    /// Optimal UNMAP granularity in logical blocks.
-    uint32_t optimal_unmap_granularity;
+	/// Optimal UNMAP granularity in logical blocks.
+	uint32_t optimal_unmap_granularity;
 
-    /// UNMAP granularity alignment (first LBA) and UGAVALID bit.
-    uint32_t unmap_granularity_align_ugavalid;
+	/// UNMAP granularity alignment (first LBA) and UGAVALID bit.
+	uint32_t unmap_granularity_align_ugavalid;
 
-    /// Maximum WRITE SAME length in logical blocks.
-    uint64_t max_write_same_len;
+	/// Maximum WRITE SAME length in logical blocks.
+	uint64_t max_write_same_len;
 
-    /// Reserved for future usage (always MUST be 0).
-    uint64_t reserved[2];
+	/// Reserved for future usage (always MUST be 0).
+	uint64_t reserved[2];
 
-    /// Reserved for future usage (always MUST be 0).
-    uint32_t reserved2;
+	/// Reserved for future usage (always MUST be 0).
+	uint32_t reserved2;
 } iscsi_scsi_vpd_page_block_limits_inquiry_data_packet;
 
 /// iSCSI SCSI Vital Product Data (VPD) Page Block Device Characteristics Inquiry data medium rotation rate: Medium rotation rate is not reported.
@@ -3525,131 +2029,32 @@ typedef struct __attribute__((packed)) iscsi_scsi_vpd_page_block_limits_inquiry_
  * set.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_vpd_page_block_dev_chars_inquiry_data_packet {
-    /// Medium rotation rate.
-    uint16_t medium_rotation_rate;
+	/// Medium rotation rate.
+	uint16_t medium_rotation_rate;
 
-    /// Product type.
-    uint8_t product_type;
+	/// Product type.
+	uint8_t product_type;
 
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Support flags.
-    uint8_t support_flags;
+	/// Support flags.
+	uint8_t support_flags;
 
-    /// Reserved for future usage (always MUST be 0).
-    uint64_t reserved[6];
+	/// Reserved for future usage (always MUST be 0).
+	uint64_t reserved[6];
 
-    /// Reserved for future usage (always MUST be 0).
-    uint32_t reserved2;
+	/// Reserved for future usage (always MUST be 0).
+	uint32_t reserved2;
 
-    /// Reserved for future usage (always MUST be 0).
-    uint16_t reserved3;
+	/// Reserved for future usage (always MUST be 0).
+	uint16_t reserved3;
 
-    /// Reserved for future usage (always MUST be 0).
-    uint8_t reserved4;
+	/// Reserved for future usage (always MUST be 0).
+	uint8_t reserved4;
 } iscsi_scsi_vpd_page_block_dev_chars_inquiry_data_packet;
 
 
-/// iSCSI SCSI Vital Product Data (VPD) Page Thin Provision Inquiry data flags: Descriptor Present (DP).
-#define ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_FLAGS_DP      (1 << 0)
-
-/// iSCSI SCSI Vital Product Data (VPD) Page Thin Provision Inquiry data flags: Anchor Supported (ANC_SUP).
-#define ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_FLAGS_ANC_SUP (1 << 1)
-
-/// iSCSI SCSI Vital Product Data (VPD) Page Thin Provision Inquiry data flags: Logical Block Provisioning Read Zeros (LBPRZ).
-#define ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_FLAGS_LBPRZ   (1 << 2)
-
-/// iSCSI SCSI Vital Product Data (VPD) Page Thin Provision Inquiry data flags: Logical Block Provisioning WRITE SAME(10) (LBPWS10).
-#define ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_FLAGS_LBPWS10 (1 << 5)
-
-/// iSCSI SCSI Vital Product Data (VPD) Page Thin Provision Inquiry data flags: Logical Block Provisioning WRITE SAME (LBPWS).
-#define ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_FLAGS_LBPWS   (1 << 6)
-
-/// iSCSI SCSI Vital Product Data (VPD) Page Thin Provision Inquiry data flags: Logical Block Provisioning UNMAP (LBPU).
-#define ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_FLAGS_LBPU    (1 << 7)
-
-
-/// iSCSI SCSI Vital Product Data (VPD) Page Thin Provision Inquiry data provision type: The device server does NOT report a provisioning type.
-#define ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_PROVISION_TYPE_PROVISIONING_NOT_REPORTED 0x0
-
-/// iSCSI SCSI Vital Product Data (VPD) Page Thin Provision Inquiry data provision type: The logical unit is resource provisioned (see SBC3).
-#define ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_PROVISION_TYPE_RESOURCE_PROVISIONING     0x1
-
-/// iSCSI SCSI Vital Product Data (VPD) Page Thin Provision Inquiry data provision type: The logical unit is thin provisioned (see SBC3).
-#define ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_PROVISION_TYPE_THIN_PROVISIONING         0x2
-
-/// iSCSI SCSI Vital Product Data (VPD) Page Thin Provision Inquiry data provision type: First bit of the three bits.
-#define ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_PROVISION_TYPE_FIRST_BIT                 0
-
-/// iSCSI SCSI Vital Product Data (VPD) Page Thin Provision Inquiry data provision type: Last bit of the three bits.
-#define ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_PROVISION_TYPE_LAST_BIT                  ((ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_PROVISION_TYPE_FIRST_BIT) + 3 - 1)
-
-/// iSCSI SCSI Vital Product Data (VPD) Page Thin Provision Inquiry data provision type: Bit mask.
-#define ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_PROVISION_TYPE_MASK                      (ISCSI_BITS_GET_MASK(ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_PROVISION_TYPE_FIRST_BIT, ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_PROVISION_TYPE_LAST_BIT))
-
-/// iSCSI SCSI Vital Product Data (VPD) Page Thin Provision Inquiry data provision type: Extracts the provision type bits.
-#define ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_GET_PROVISION_TYPE(x)                    (ISCSI_BITS_GET((x), ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_PROVISION_TYPE_FIRST_BIT, ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_PROVISION_TYPE_LAST_BIT))
-
-/// iSCSI SCSI Vital Product Data (VPD) Page Thin Provision Inquiry data provision type: Stores into the provision type bits.
-#define ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_PUT_PROVISION_TYPE(x)                    (ISCSI_BITS_PUT((x), ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_PROVISION_TYPE_FIRST_BIT, ISCSI_SCSI_VPD_PAGE_THIN_PROVISION_INQUIRY_DATA_PROVISION_TYPE_LAST_BIT))
-
-
-/**
- * @brief iSCSI SCSI Vital Product Data (VPD) Page Thin Provision Inquiry data packet.
- *
- * This structure is used by the SCSI INQUIRY command
- * in order to fill in the result if the EVPD bit is
- * set.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_vpd_page_thin_provision_inquiry_data_packet {
-    /// Threshold exponent.
-    uint8_t threshold_exponent;
-
-    /// Flags.
-    int8_t flags;
-
-    /// Provision type.
-    uint8_t provision_type;
-
-    /// Reserved for future usage (always MUST be 0).
-    uint8_t reserved;
-
-    /// Provision group descriptors.
-    uint8_t provision_group_desc[0];
-} iscsi_scsi_vpd_page_thin_provision_inquiry_data_packet;
-
-
-/**
- * @brief iSCSI SCSI Sense Event data packet.
- *
- * For a SCSI event, this data accompanies the report in the data
- * segment and identifies the condition.
- *
- * For an iSCSI event, additional vendor-unique data MAY accompany the
- * Async event. Initiators MAY ignore the data when not understood,
- * while processing the rest of the PDU.
- *
- * If the DataSegmentLength is not 0, the format of the DataSegment is
- * as follows:
- */
-typedef struct __attribute__((packed)) iscsi_scsi_sense_event_data_packet {
-    /**
-     * @brief SenseLength.
-     *
-     * This is the length of Sense Data. When the Sense Data field is empty
-     * (e.g., the event is not a SCSI event), SenseLength is 0.
-     */
-    uint16_t sense_len;
-
-    /// Sense Data.
-    uint16_t sense_data[0];
-
-    /// iSCSI Event Data.
-    uint16_t event_data[0];
-} iscsi_scsi_sense_event_data_packet;
-
-
 /// iSCSI SCSI sense data response code: Current format.
 #define ISCSI_SCSI_SENSE_DATA_RESPONSE_CODE_CURRENT_FMT  0x70
 
@@ -3707,20 +2112,20 @@ typedef struct __attribute__((packed)) iscsi_scsi_sense_event_data_packet {
  * all SCSI sense data.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_sense_data_packet {
-    /// Response code.
-    int8_t response_code;
+	/// Response code.
+	int8_t response_code;
 
-    /// Reserved for future usage (always MUST be 0).
-    uint8_t reserved;
+	/// Reserved for future usage (always MUST be 0).
+	uint8_t reserved;
 
-    /// Sense key and flags.
-    int8_t sense_key_flags;
+	/// Sense key and flags.
+	int8_t sense_key_flags;
 
-    /// Information.
-    uint32_t info;
+	/// Information.
+	uint32_t info;
 
-    /// Additional sense length in bytes.
-    uint8_t add_len;
+	/// Additional sense length in bytes.
+	uint8_t add_len;
 } iscsi_scsi_sense_data_packet;
 
 /// iSCSI SCSI maximum sense data length.
@@ -3753,26 +2158,26 @@ typedef struct __attribute__((packed)) iscsi_scsi_sense_data_packet {
  * the check condition status code.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_sense_data_check_cond_packet {
-    /// Basic SCSI sense data packet.
-    iscsi_scsi_sense_data_packet sense_data;
+	/// Basic SCSI sense data packet.
+	iscsi_scsi_sense_data_packet sense_data;
 
-    /// Information.
-    uint32_t cmd_spec_info;
+	/// Information.
+	uint32_t cmd_spec_info;
 
-    /// Additional Sense Code (ASC).
-    uint8_t asc;
+	/// Additional Sense Code (ASC).
+	uint8_t asc;
 
-    /// Additional Sense Code Qualifier (ASCQ).
-    uint8_t ascq;
+	/// Additional Sense Code Qualifier (ASCQ).
+	uint8_t ascq;
 
-    /// Field replaceable unit code.
-    uint8_t field_rep_unit_code;
+	/// Field replaceable unit code.
+	uint32_t field_rep_unit_code;
 
-    /// Sense key specific.
-    uint8_t sense_key_spec_flags;
+	/// Sense key specific.
+	uint8_t sense_key_spec_flags;
 
-    /// Sense key specific.
-    uint16_t sense_key_spec;
+	/// Sense key specific.
+	uint16_t sense_key_spec;
 } iscsi_scsi_sense_data_check_cond_packet;
 
 
@@ -3783,11 +2188,11 @@ typedef struct __attribute__((packed)) iscsi_scsi_sense_data_check_cond_packet {
  * and block length in bytes.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_read_capacity_10_parameter_data_packet {
-    /// Last valid Logical Block Address (LBA).
-    uint32_t lba;
+	/// Last valid Logical Block Address (LBA).
+	uint32_t lba;
 
-    /// Block length in bytes.
-    uint32_t block_len;
+	/// Block length in bytes.
+	uint32_t block_len;
 } iscsi_scsi_read_capacity_10_parameter_data_packet;
 
 
@@ -3885,23 +2290,23 @@ typedef struct __attribute__((packed)) iscsi_scsi_read_capacity_10_parameter_dat
  * block length in bytes and LBP information.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_service_action_in_16_parameter_data_packet {
-    /// Last valid Logical Block Address (LBA).
-    uint64_t lba;
+	/// Last valid Logical Block Address (LBA).
+	uint64_t lba;
 
-    /// Block length in bytes.
-    uint32_t block_len;
+	/// Block length in bytes.
+	uint32_t block_len;
 
-    /// Flags: RC_BASIS, P_TYPE and PROT_EN.
-    int8_t flags;
+	/// Flags: RC_BASIS, P_TYPE and PROT_EN.
+	int8_t flags;
 
-    /// P_I_EXPONENT and logical blocks per physical block exponent.
-    uint8_t exponents;
+	/// P_I_EXPONENT and logical blocks per physical block exponent.
+	uint8_t exponents;
 
-    /// Logical Block Provisioning Management Enabled (LBPME), Logical Block Provisioning Read Zeros (LBPRZ) and Lowest Aligned Logical Block Address (LALBA).
-    uint16_t lbp_lalba;
+	/// Logical Block Provisioning Management Enabled (LBPME), Logical Block Provisioning Read Zeros (LBPRZ) and Lowest Aligned Logical Block Address (LALBA).
+	uint16_t lbp_lalba;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint64_t reserved[2];
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint64_t reserved[2];
 } iscsi_scsi_service_action_in_16_parameter_data_packet;
 
 
@@ -3912,11 +2317,11 @@ typedef struct __attribute__((packed)) iscsi_scsi_service_action_in_16_parameter
  * LUN list in bytes.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_report_luns_parameter_data_lun_list_packet {
-    /// Number of LUN's following this packet in bytes.
-    uint32_t lun_list_len;
+	/// Number of LUN's following this packet in bytes.
+	uint32_t lun_list_len;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint32_t reserved;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint32_t reserved;
 } iscsi_scsi_report_luns_parameter_data_lun_list_packet;
 
 
@@ -3927,44 +2332,19 @@ typedef struct __attribute__((packed)) iscsi_scsi_report_luns_parameter_data_lun
  * LUN list.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_report_luns_parameter_data_lun_entry_packet {
-    /// Logical Unit Number (LUN).
-    uint64_t lun;
+	/// Logical Unit Number (LUN).
+	uint64_t lun;
 } iscsi_scsi_report_luns_parameter_data_lun_entry_packet;
 
 
 /**
- * @brief iSCSI SCSI command REPORT LUNS parameter data LUN entry fill.
- *
- * This structure is used by iterating through
- * all iSCSI LUNs in order to fill in the
- * REPORT LUNS parameter data structure.
- */
-typedef struct iscsi_scsi_emu_primary_report_luns_fill {
-    /// Pointer to LUN list packet data.
-    iscsi_scsi_report_luns_parameter_data_lun_list_packet *lun_list;
-
-    /// Pointer to current LUN entry packet data.
-    iscsi_scsi_report_luns_parameter_data_lun_entry_packet *lun_entry;
-
-    /// Total length of LUN entry packet data in bytes.
-    uint32_t len;
-
-    /// Total remaining allocation length for packet data in bytes.
-    uint alloc_len;
-
-    /// Select report.
-    uint select_report;
-} iscsi_scsi_emu_primary_report_luns_fill;
-
-
-/**
  * @brief iSCSI SCSI command MODE SELECT(6) parameter list packet data.
  *
  * This returns 32-bit vendor specific data.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_mode_select_6_parameter_list_packet {
-    /// Vendor specific data.
-    uint32_t vendor_data;
+	/// Vendor specific data.
+	uint32_t vendor_data;
 } iscsi_scsi_mode_select_6_parameter_list_packet;
 
 
@@ -3974,8 +2354,8 @@ typedef struct __attribute__((packed)) iscsi_scsi_mode_select_6_parameter_list_p
  * This returns 64-bit vendor specific data.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_mode_select_10_parameter_list_packet {
-    /// Vendor specific data.
-    uint64_t vendor_data;
+	/// Vendor specific data.
+	uint64_t vendor_data;
 } iscsi_scsi_mode_select_10_parameter_list_packet;
 
 
@@ -3993,17 +2373,17 @@ typedef struct __attribute__((packed)) iscsi_scsi_mode_select_10_parameter_list_
  * data.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_6_parameter_header_data_packet {
-    /// Mode data length in bytes.
-    uint8_t mode_data_len;
+	/// Mode data length in bytes.
+	uint8_t mode_data_len;
 
-    /// Medium type.
-    uint8_t medium_type;
+	/// Medium type.
+	uint8_t medium_type;
 
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Block descriptor length in bytes.
-    uint8_t block_desc_len;
+	/// Block descriptor length in bytes.
+	uint8_t block_desc_len;
 } iscsi_scsi_mode_sense_6_parameter_header_data_packet;
 
 
@@ -4025,23 +2405,23 @@ typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_6_parameter_header_
  * data.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_10_parameter_header_data_packet {
-    /// Mode data length in bytes.
-    uint16_t mode_data_len;
+	/// Mode data length in bytes.
+	uint16_t mode_data_len;
 
-    /// Medium type.
-    uint8_t medium_type;
+	/// Medium type.
+	uint8_t medium_type;
 
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Long Logical Block Address (LONGLBA).
-    uint8_t long_lba;
+	/// Long Logical Block Address (LONGLBA).
+	uint8_t long_lba;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint8_t reserved;
 
-    /// Block descriptor length in bytes.
-    uint16_t block_desc_len;
+	/// Block descriptor length in bytes.
+	uint16_t block_desc_len;
 } iscsi_scsi_mode_sense_10_parameter_header_data_packet;
 
 
@@ -4053,14 +2433,14 @@ typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_10_parameter_header
  * descriptor data.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_lba_parameter_block_desc_data_packet {
-    /// Number of blocks in logical blocks.
-    uint32_t num_blocks;
+	/// Number of blocks in logical blocks.
+	uint32_t num_blocks;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint8_t reserved;
 
-    /// Logical blcok length in bytes.
-    uint8_t block_len[3];
+	/// Logical blcok length in bytes.
+	uint8_t block_len[3];
 } iscsi_scsi_mode_sense_lba_parameter_block_desc_data_packet;
 
 
@@ -4072,14 +2452,14 @@ typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_lba_parameter_block
  * descriptor data.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_long_lba_parameter_block_desc_data_packet {
-    /// Number of blocks in logical blocks.
-    uint64_t num_blocks;
+	/// Number of blocks in logical blocks.
+	uint64_t num_blocks;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint32_t reserved;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint32_t reserved;
 
-    /// Logical blcok length in bytes.
-    uint32_t block_len;
+	/// Logical blcok length in bytes.
+	uint32_t block_len;
 } iscsi_scsi_mode_sense_long_lba_parameter_block_desc_data_packet;
 
 
@@ -4318,14 +2698,14 @@ typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_long_lba_parameter_
  * This returns mode page specific data.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_mode_page_data_packet {
-    /// Page code and flags.
-    int8_t page_code_flags;
+	/// Page code and flags.
+	int8_t page_code_flags;
 
-    /// Page length in bytes.
-    uint8_t page_len;
+	/// Page length in bytes.
+	uint8_t page_len;
 
-    /// Mode parameters.
-    uint8_t params[0];
+	/// Mode parameters.
+	uint8_t params[0];
 } iscsi_scsi_mode_sense_mode_page_data_packet;
 
 
@@ -4335,17 +2715,17 @@ typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_mode_page_data_pack
  * This returns mode sub page specific data.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_mode_sub_page_data_packet {
-    /// Page code and flags.
-    int8_t page_code_flags;
+	/// Page code and flags.
+	int8_t page_code_flags;
 
-    /// Sub page code.
-    uint8_t sub_page_code;
+	/// Sub page code.
+	uint8_t sub_page_code;
 
-    /// Page length in bytes.
-    uint16_t page_len;
+	/// Page length in bytes.
+	uint16_t page_len;
 
-    /// Mode parameters.
-    uint8_t params[0];
+	/// Mode parameters.
+	uint8_t params[0];
 } iscsi_scsi_mode_sense_mode_sub_page_data_packet;
 
 
@@ -4355,29 +2735,29 @@ typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_mode_sub_page_data_
  * This returns mode page specific data.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_read_write_err_recovery_mode_page_data_packet {
-    /// Mode page.
-    iscsi_scsi_mode_sense_mode_page_data_packet mode_page;
+	/// Mode page.
+	iscsi_scsi_mode_sense_mode_page_data_packet mode_page;
 
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Read retry count.
-    uint8_t read_retry_cnt;
+	/// Read retry count.
+	uint8_t read_retry_cnt;
 
-    /// Obselete.
-    uint8_t obselete[3];
+	/// Obselete.
+	uint8_t obselete[3];
 
-    /// Restricted for MMC-6.
-    uint8_t restrict_mmc_6;
+	/// Restricted for MMC-6.
+	uint8_t restrict_mmc_6;
 
-    /// Write_retry count.
-    uint8_t write_retry_cnt;
+	/// Write_retry count.
+	uint8_t write_retry_cnt;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint8_t reserved;
 
-    /// Recovery time limit.
-    uint16_t recovery_time_limit;
+	/// Recovery time limit.
+	uint16_t recovery_time_limit;
 } iscsi_scsi_mode_sense_read_write_err_recovery_mode_page_data_packet;
 
 
@@ -4387,32 +2767,32 @@ typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_read_write_err_reco
  * This returns mode page specific data.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_disconnect_reconnect_mode_page_data_packet {
-    /// Mode page.
-    iscsi_scsi_mode_sense_mode_page_data_packet mode_page;
+	/// Mode page.
+	iscsi_scsi_mode_sense_mode_page_data_packet mode_page;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint16_t reserved;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint16_t reserved;
 
-    /// Bus inactivity time limit.
-    uint16_t bus_inactivity_time_limit;
+	/// Bus inactivity time limit.
+	uint16_t bus_inactivity_time_limit;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint16_t reserved2;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint16_t reserved2;
 
-    /// Maximum connect time limit.
-    uint16_t max_connect_time_limit;
+	/// Maximum connect time limit.
+	uint16_t max_connect_time_limit;
 
-    /// Maximum burst size.
-    uint16_t max_burst_size;
+	/// Maximum burst size.
+	uint16_t max_burst_size;
 
-    /// Restricted.
-    uint8_t restricted;
+	/// Restricted.
+	uint8_t restricted;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved3;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint8_t reserved3;
 
-    /// First burst size.
-    uint16_t first_burst_size;
+	/// First burst size.
+	uint16_t first_burst_size;
 } iscsi_scsi_mode_sense_disconnect_reconnect_mode_page_data_packet;
 
 
@@ -4422,35 +2802,35 @@ typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_disconnect_reconnec
  * This returns mode page specific data.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_verify_err_recovery_mode_page_data_packet {
-    /// Mode page.
-    iscsi_scsi_mode_sense_mode_page_data_packet mode_page;
+	/// Mode page.
+	iscsi_scsi_mode_sense_mode_page_data_packet mode_page;
 
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Verify retry count.
-    uint8_t verify_retry_cnt;
+	/// Verify retry count.
+	uint8_t verify_retry_cnt;
 
-    /// Obselete.
-    uint8_t obselete;
+	/// Obselete.
+	uint8_t obselete;
 
-    /// Head offset count.
-    uint8_t head_offset_cnt;
+	/// Head offset count.
+	uint8_t head_offset_cnt;
 
-    /// Data strobe offset count.
-    uint8_t data_strobe_offset_cnt;
+	/// Data strobe offset count.
+	uint8_t data_strobe_offset_cnt;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint8_t reserved;
 
-    /// Write retry count.
-    uint8_t write_retry_cnt;
+	/// Write retry count.
+	uint8_t write_retry_cnt;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved2;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint8_t reserved2;
 
-    /// Verify_recovery time limit.
-    uint16_t verify_recovery_time_limit;
+	/// Verify_recovery time limit.
+	uint16_t verify_recovery_time_limit;
 } iscsi_scsi_mode_sense_verify_err_recovery_mode_page_data_packet;
 
 
@@ -4485,41 +2865,41 @@ typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_verify_err_recovery
  * This returns mode page specific data.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_caching_mode_page_data_packet {
-    /// Mode page.
-    iscsi_scsi_mode_sense_mode_page_data_packet mode_page;
+	/// Mode page.
+	iscsi_scsi_mode_sense_mode_page_data_packet mode_page;
 
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Retention priority.
-    uint8_t retention_pri;
+	/// Retention priority.
+	uint8_t retention_pri;
 
-    /// Disable prefetch transfer length.
-    uint16_t disable_prefetch_xfer_len;
+	/// Disable prefetch transfer length.
+	uint16_t disable_prefetch_xfer_len;
 
-    /// Minimum prefetch.
-    uint16_t min_prefetch;
+	/// Minimum prefetch.
+	uint16_t min_prefetch;
 
-    /// Maximum prefetch.
-    uint16_t max_prefetch;
+	/// Maximum prefetch.
+	uint16_t max_prefetch;
 
-    /// Maximum prefetch ceiling.
-    uint16_t max_prefetch_ceil;
+	/// Maximum prefetch ceiling.
+	uint16_t max_prefetch_ceil;
 
-    /// Cache flags.
-    int8_t cache_flags;
+	/// Cache flags.
+	int8_t cache_flags;
 
-    /// Number of cache segments.
-    uint8_t num_cache_segs;
+	/// Number of cache segments.
+	uint8_t num_cache_segs;
 
-    /// Cache segment size.
-    uint16_t cache_seg_size;
+	/// Cache segment size.
+	uint16_t cache_seg_size;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint8_t reserved;
 
-    /// Obselete.
-    uint8_t obselete[3];
+	/// Obselete.
+	uint8_t obselete[3];
 } iscsi_scsi_mode_sense_caching_mode_page_data_packet;
 
 
@@ -4529,29 +2909,29 @@ typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_caching_mode_page_d
  * This returns mode page specific data.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_control_mode_page_data_packet {
-    /// Mode page.
-    iscsi_scsi_mode_sense_mode_page_data_packet mode_page;
+	/// Mode page.
+	iscsi_scsi_mode_sense_mode_page_data_packet mode_page;
 
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Queue flags.
-    int8_t queue_flags;
+	/// Queue flags.
+	int8_t queue_flags;
 
-    /// Control flags.
-    int8_t control_flags;
+	/// Control flags.
+	int8_t control_flags;
 
-    /// Application task flags.
-    int8_t app_task_flags;
+	/// Application task flags.
+	int8_t app_task_flags;
 
-    /// Ready AER holdoff period.
-    uint16_t ready_aer_holdoff_period;
+	/// Ready AER holdoff period.
+	uint16_t ready_aer_holdoff_period;
 
-    /// Busy timeout period.
-    uint16_t busy_timeout_period;
+	/// Busy timeout period.
+	uint16_t busy_timeout_period;
 
-    /// Extended self-test completition time.
-    uint16_t ext_self_test_complete_time;
+	/// Extended self-test completition time.
+	uint16_t ext_self_test_complete_time;
 } iscsi_scsi_mode_sense_control_mode_page_data_packet;
 
 
@@ -4561,23 +2941,23 @@ typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_control_mode_page_d
  * This returns mode sub page specific data.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_control_ext_mode_page_data_packet {
-    /// Mode page.
-    iscsi_scsi_mode_sense_mode_sub_page_data_packet mode_sub_page;
+	/// Mode page.
+	iscsi_scsi_mode_sense_mode_sub_page_data_packet mode_sub_page;
 
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Initial command priority.
-    uint8_t init_cmd_pri;
+	/// Initial command priority.
+	uint8_t init_cmd_pri;
 
-    /// Maximum sense data length in bytes.
-    uint8_t max_sense_data_len;
+	/// Maximum sense data length in bytes.
+	uint8_t max_sense_data_len;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint64_t reserved[3];
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint64_t reserved[3];
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved2;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint8_t reserved2;
 } iscsi_scsi_mode_sense_control_ext_mode_page_data_packet;
 
 
@@ -4587,32 +2967,32 @@ typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_control_ext_mode_pa
  * This returns mode page specific data.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_xor_ext_mode_page_data_packet {
-    /// Mode page.
-    iscsi_scsi_mode_sense_mode_page_data_packet mode_page;
+	/// Mode page.
+	iscsi_scsi_mode_sense_mode_page_data_packet mode_page;
 
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint8_t reserved;
 
-    /// Maximum XOR write size in logical blocks.
-    uint32_t max_xor_write_size;
+	/// Maximum XOR write size in logical blocks.
+	uint32_t max_xor_write_size;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint32_t reserved2;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint32_t reserved2;
 
-    /// Maximum regenerate size in logical blocks.
-    uint32_t max_regenerate_size;
+	/// Maximum regenerate size in logical blocks.
+	uint32_t max_regenerate_size;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint32_t reserved3;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint32_t reserved3;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint16_t reserved4;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint16_t reserved4;
 
-    /// Rebuild delay.
-    uint16_t rebuild_delay;
+	/// Rebuild delay.
+	uint16_t rebuild_delay;
 } iscsi_scsi_mode_sense_xor_ext_mode_page_data_packet;
 
 
@@ -4622,44 +3002,44 @@ typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_xor_ext_mode_page_d
  * This returns mode page specific data.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_power_cond_mode_page_data_packet {
-    /// Mode page.
-    iscsi_scsi_mode_sense_mode_page_data_packet mode_page;
+	/// Mode page.
+	iscsi_scsi_mode_sense_mode_page_data_packet mode_page;
 
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Idle and standby flags.
-    int8_t idle_standby_flags;
+	/// Idle and standby flags.
+	int8_t idle_standby_flags;
 
-    /// idle_a condition timer.
-    uint32_t idle_a_cond_timer;
+	/// idle_a condition timer.
+	uint32_t idle_a_cond_timer;
 
-    /// standby_z condition timer.
-    uint32_t standby_z_cond_timer;
+	/// standby_z condition timer.
+	uint32_t standby_z_cond_timer;
 
-    /// idle_b condition timer.
-    uint32_t idle_b_cond_timer;
+	/// idle_b condition timer.
+	uint32_t idle_b_cond_timer;
 
-    /// idle_c condition timer.
-    uint32_t idle_c_cond_timer;
+	/// idle_c condition timer.
+	uint32_t idle_c_cond_timer;
 
-    /// standby_y condition timer.
-    uint32_t standby_y_cond_timer;
+	/// standby_y condition timer.
+	uint32_t standby_y_cond_timer;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint64_t reserved;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint64_t reserved;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint32_t reserved2;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint32_t reserved2;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint16_t reserved3;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint16_t reserved3;
 
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved4;
+	/// Reserved for future usage (always MUST be 0 for now).
+	uint8_t reserved4;
 
-    /// Check Condition From (CCF) flags.
-    int8_t ccf_flags;
+	/// Check Condition From (CCF) flags.
+	int8_t ccf_flags;
 } iscsi_scsi_mode_sense_power_cond_mode_page_data_packet;
 
 
@@ -4669,65 +3049,23 @@ typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_power_cond_mode_pag
  * This returns mode page specific data.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_mode_sense_info_exceptions_control_mode_page_data_packet {
-    /// Mode page.
-    iscsi_scsi_mode_sense_mode_page_data_packet mode_page;
+	/// Mode page.
+	iscsi_scsi_mode_sense_mode_page_data_packet mode_page;
 
-    /// Flags.
-    int8_t flags;
+	/// Flags.
+	int8_t flags;
 
-    /// Method Of Reporting Informational Exceptions (MRIE) flags.
-    uint8_t mrie;
+	/// Method Of Reporting Informational Exceptions (MRIE) flags.
+	uint8_t mrie;
 
-    /// Interval timer.
-    uint32_t interval_timer;
+	/// Interval timer.
+	uint32_t interval_timer;
 
-    /// Report count.
-    uint32_t report_cnt;
+	/// Report count.
+	uint32_t report_cnt;
 } iscsi_scsi_mode_sense_info_exceptions_control_mode_page_data_packet;
 
 
-/**
- * @brief iSCSI SCSI command PERSISTENT RESERVE OUT parameter list packet data.
- *
- * This returns persistent storage specific data
- * like the reservation and service action keys.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_pr_reserve_out_parameter_list_packet {
-    /// Reservation key.
-    uint64_t r_key;
-
-    /// Service action reservation key.
-    uint64_t sa_key;
-
-    /// Obselete.
-    uint32_t obselete;
-
-    /// Flags.
-    int8_t flags;
-
-    /// Reserved for future usage (always MUST be 0 for now).
-    uint8_t reserved;
-
-    /// Obselete.
-    uint16_t obselete2;
-
-} iscsi_scsi_pr_reserve_out_parameter_list_packet;
-
-
-/**
- * @brief iSCSI SCSI command PERSISTENT RESERVE IN parameter data packet data.
- *
- * This returns persistent storage specific data
- * like the reservation and service action keys.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_pr_reserve_in_parameter_data_packet {
-    /// Persistent Reservations (PR) Generation.
-    uint32_t pr_gen;
-
-    /// Additional length in bytes.
-    uint32_t add_len;
-} iscsi_scsi_pr_reserve_in_parameter_data_packet;
-
 
 /// SCSI command opcode (embedded in iSCSI protocol): TEST UNIT READY.
 #define ISCSI_SCSI_OPCODE_TESTUNITREADY          0x00
@@ -4954,86 +3292,80 @@ typedef struct __attribute__((packed)) iscsi_scsi_pr_reserve_in_parameter_data_p
  * direction is indicated by the R and/or W bit).
  */
 typedef struct __attribute__((packed)) iscsi_scsi_cmd_packet {
-    /// Always 1 according to the iSCSI specification.
-    uint8_t opcode;
-
-    /// Flags and Task Attributes.
-    int8_t flags_task;
-
-    /// Reserved for future usage, MUST always be 0.
-    uint16_t reserved;
-
-    /// Total length of AHS.
-    uint8_t total_ahs_len;
-
-    /// Length of DataSegment.
-    uint8_t ds_len[3];
-
-    /// SCSI LUN bit mask.
-    uint64_t lun;
-
-    /// Initiator Task Tag (ITT).
-    uint32_t init_task_tag;
-
-    /**
-     * @brief Expected Data Transfer Length.
-     *
-     * For unidirectional operations, the Expected Data Transfer Length
-     * field contains the number of bytes of data involved in this SCSI
-     * operation. For a unidirectional write operation (W flag set to 1 and
-     * R flag set to 0), the initiator uses this field to specify the number
-     * of bytes of data it expects to transfer for this operation. For a
-     * unidirectional read operation (W flag set to 0 and R flag set to 1),
-     * the initiator uses this field to specify the number of bytes of data
-     * it expects the target to transfer to the initiator. It corresponds
-     * to the SAM-2 byte count.\n
-     * For bidirectional operations (both R and W flags are set to 1), this
-     * field contains the number of data bytes involved in the write
-     * transfer. For bidirectional operations, an additional header segment
-     * MUST be present in the header sequence that indicates the
-     * Bidirectional Read Expected Data Transfer Length. The Expected Data
-     * Transfer Length field and the Bidirectional Read Expected Data
-     * Transfer Length field correspond to the SAM-2 byte count.
-     * If the Expected Data Transfer Length for a write and the length of
-     * the immediate data part that follows the command (if any) are the
-     * same, then no more data PDUs are expected to follow. In this case,
-     * the F bit MUST be set to 1.\n
-     * If the Expected Data Transfer Length is higher than the
-     * FirstBurstLength (the negotiated maximum amount of unsolicited data
-     * the target will accept), the initiator MUST send the maximum amount
-     * of unsolicited data OR ONLY the immediate data, if any.
-     * Upon completion of a data transfer, the target informs the initiator
-     * (through residual counts) of how many bytes were actually processed
-     * (sent and/or received) by the target.
-     */
-    uint32_t exp_xfer_len;
-
-    /// The CmdSN enables ordered delivery across multiple connections in a single session.
-    uint32_t cmd_sn;
-
-    /// Command responses up to ExpStatSN - 1 (modulo 2**32) have been received (acknowledges status) on the connection.
-    uint32_t exp_stat_sn;
-
-    /**
-     * @brief SCSI Command Descriptor Block (CDB).
-     *
-     * There are 16 bytes in the CDB field to accommodate the commonly used
-     * CDBs. Whenever the CDB is larger than 16 bytes, an Extended CDB AHS
-     * MUST be used to contain the CDB spillover.
-     */
-    iscsi_scsi_cdb scsi_cdb;
-
-    /// Optional AHS packet data.
-    iscsi_ahs_packet ahs;
-
-    /// Optional header digest.
-    iscsi_header_digest hdr_digest;
-
-    /// Optional data segment, command data.
-    iscsi_scsi_ds_cmd_data ds_cmd_data;
-
-    /// Optional data digest.
-    iscsi_data_digest data_digest;
+	/// Always 1 according to the iSCSI specification.
+	uint8_t opcode;
+
+	/// Flags and Task Attributes.
+	int8_t flags_task;
+
+	/// Reserved for future usage, MUST always be 0.
+	uint16_t reserved;
+
+	/// Total length of AHS.
+	uint8_t total_ahs_len;
+
+	/// Length of DataSegment.
+	uint8_t ds_len[3];
+
+	/// SCSI LUN bit mask.
+	uint64_t lun;
+
+	/// Initiator Task Tag (ITT).
+	uint32_t init_task_tag;
+
+	/**
+	 * @brief Expected Data Transfer Length.
+	 *
+	 * For unidirectional operations, the Expected Data Transfer Length
+	 * field contains the number of bytes of data involved in this SCSI
+	 * operation. For a unidirectional write operation (W flag set to 1 and
+	 * R flag set to 0), the initiator uses this field to specify the number
+	 * of bytes of data it expects to transfer for this operation. For a
+	 * unidirectional read operation (W flag set to 0 and R flag set to 1),
+	 * the initiator uses this field to specify the number of bytes of data
+	 * it expects the target to transfer to the initiator. It corresponds
+	 * to the SAM-2 byte count.\n
+	 * For bidirectional operations (both R and W flags are set to 1), this
+	 * field contains the number of data bytes involved in the write
+	 * transfer. For bidirectional operations, an additional header segment
+	 * MUST be present in the header sequence that indicates the
+	 * Bidirectional Read Expected Data Transfer Length. The Expected Data
+	 * Transfer Length field and the Bidirectional Read Expected Data
+	 * Transfer Length field correspond to the SAM-2 byte count.
+	 * If the Expected Data Transfer Length for a write and the length of
+	 * the immediate data part that follows the command (if any) are the
+	 * same, then no more data PDUs are expected to follow. In this case,
+	 * the F bit MUST be set to 1.\n
+	 * If the Expected Data Transfer Length is higher than the
+	 * FirstBurstLength (the negotiated maximum amount of unsolicited data
+	 * the target will accept), the initiator MUST send the maximum amount
+	 * of unsolicited data OR ONLY the immediate data, if any.
+	 * Upon completion of a data transfer, the target informs the initiator
+	 * (through residual counts) of how many bytes were actually processed
+	 * (sent and/or received) by the target.
+	 */
+	uint32_t exp_xfer_len;
+
+	/// The CmdSN enables ordered delivery across multiple connections in a single session.
+	uint32_t cmd_sn;
+
+	/// Command responses up to ExpStatSN - 1 (modulo 2**32) have been received (acknowledges status) on the connection.
+	uint32_t exp_stat_sn;
+
+	/**
+	 * @brief SCSI Command Descriptor Block (CDB).
+	 *
+	 * There are 16 bytes in the CDB field to accommodate the commonly used
+	 * CDBs. Whenever the CDB is larger than 16 bytes, an Extended CDB AHS
+	 * MUST be used to contain the CDB spillover.
+	 */
+	iscsi_scsi_cdb scsi_cdb;
+
+	/// Optional AHS packet data.
+	iscsi_ahs_packet ahs;
+
+	/// Optional data segment, command data.
+	iscsi_scsi_ds_cmd_data ds_cmd_data;
 } iscsi_scsi_cmd_packet;
 
 
@@ -5234,497 +3566,133 @@ typedef struct __attribute__((packed)) iscsi_scsi_cmd_packet {
  * terms, response value 0x00 maps to the SCSI service response (see
  */
 typedef struct __attribute__((packed)) iscsi_scsi_response_packet {
-    /// Always 0x21 according to specification.
-    uint8_t opcode;
-
-    /// Flags.
-    int8_t flags;
-
-    /// This field contains the iSCSI service response.
-    uint8_t response;
-
-    /// The Status field is used to report the SCSI status of the command (as specified in SAM2) and is only valid if the response code is Command Completed at Target.
-    uint8_t status;
-
-    /// Total AHS length.
-    uint8_t total_ahs_len;
-
-    /// Data segment length.
-    uint8_t ds_len[3];
-
-    /// Reserved for future usage. Always MUST be 0.
-    uint64_t reserved;
-
-    /// Initiator Task Tag (ITT).
-    uint32_t init_task_tag;
-
-    /**
-     * @brief Copy of the last accepted Selective Negative / Sequence Number Acknowledgment (SNACK) tag.
-     *
-     * This field contains a copy of the SNACK Tag of the last SNACK Tag
-     * accepted by the target on the same connection and for the command for
-     * which the response is issued. Otherwise, it is reserved and should
-     * be set to 0.\n
-     * After issuing a R-Data SNACK, the initiator must discard any SCSI
-     * status unless contained in a SCSI Response PDU carrying the same
-     * SNACK Tag as the last issued R-Data SNACK for the SCSI command on the
-     * current connection.
-     */
-    uint32_t snack_tag;
-
-    /**
-     * @brief StatSN - Status Sequence Number.
-     *
-     * The StatSN is a sequence number that the target iSCSI layer generates
-     * per connection and that in turn enables the initiator to acknowledge
-     * status reception. The StatSN is incremented by 1 for every
-     * response/status sent on a connection, except for responses sent as a
-     * result of a retry or SNACK. In the case of responses sent due to a
-     * retransmission request, the StatSN MUST be the same as the first time
-     * the PDU was sent, unless the connection has since been restarted.
-     */
-    uint32_t stat_sn;
-
-    /**
-     * @brief ExpCmdSN - Next Expected CmdSN from This Initiator.
-     *
-     * The ExpCmdSN is a sequence number that the target iSCSI returns to
-     * the initiator to acknowledge command reception. It is used to update
-     * a local variable with the same name. An ExpCmdSN equal to
-     * MaxCmdSN + 1 indicates that the target cannot accept new commands.
-     */
-    uint32_t exp_cmd_sn;
-
-    /**
-     * @brief MaxCmdSN - Maximum CmdSN from This Initiator.
-     *
-     * The MaxCmdSN is a sequence number that the target iSCSI returns to
-     * the initiator to indicate the maximum CmdSN the initiator can send.
-     * It is used to update a local variable with the same name. If the
-     * MaxCmdSN is equal to ExpCmdSN - 1, this indicates to the initiator
-     * that the target cannot receive any additional commands. When the
-     * MaxCmdSN changes at the target while the target has no pending PDUs
-     * to convey this information to the initiator, it MUST generate a
-     * NOP-In to carry the new MaxCmdSN.
-     */
-    uint32_t max_cmd_sn;
-
-    /**
-     * @brief ExpDataSN or Reserved.
-     *
-     * This field indicates the number of Data-In (read) PDUs the target has
-     * sent for the command.\n
-     * This field MUST be 0 if the response code is not Command Completed at
-     * Target or the target sent no Data-In PDUs for the command.
-     */
-    uint32_t exp_data_sn;
-
-    /**
-     * @brief Bidirectional Read Residual Count or Reserved.
-     *
-     * The Bidirectional Read Residual Count field MUST be valid in the case
-     * where either the u bit or the o bit is set. If neither bit is set,
-     * the Bidirectional Read Residual Count field is reserved. Targets may
-     * set the Bidirectional Read Residual Count, and initiators may use it
-     * when the response code is Command Completed at Target. If the o bit
-     * is set, the Bidirectional Read Residual Count indicates the number of
-     * bytes that were not transferred to the initiator because the
-     * initiator's Bidirectional Read Expected Data Transfer Length was not
-     * sufficient. If the u bit is set, the Bidirectional Read Residual
-     * Count indicates the number of bytes that were not transferred to the
-     * initiator out of the number of bytes expected to be transferred.
-     */
-    uint32_t bidi_read_res_cnt;
-
-    /**
-     * @brief Residual Count or Reserved.
-     *
-     * The Residual Count field MUST be valid in the case where either the U
-     * bit or the O bit is set. If neither bit is set, the Residual Count
-     * field MUST be ignored on reception and SHOULD be set to 0 when
-     * sending. Targets may set the residual count, and initiators may use
-     * it when the response code is Command Completed at Target (even if the
-     * status returned is not GOOD). If the O bit is set, the Residual
-     * Count indicates the number of bytes that were not transferred because
-     * the initiator's Expected Data Transfer Length was not sufficient. If
-     * the U bit is set, the Residual Count indicates the number of bytes
-     * that were not transferred out of the number of bytes expected to be
-     * transferred.
-     */
-    uint32_t res_cnt;
-
-    /// Optional header digest.
-    iscsi_header_digest hdr_digest;
-
-    /// Optional data segment, command data.
-    iscsi_scsi_ds_cmd_data ds_cmd_data;
-
-    /// Optional data digest.
-    iscsi_data_digest data_digest;
+	/// Always 0x21 according to specification.
+	uint8_t opcode;
+
+	/// Flags.
+	int8_t flags;
+
+	/// This field contains the iSCSI service response.
+	uint8_t response;
+
+	/// The Status field is used to report the SCSI status of the command (as specified in SAM2) and is only valid if the response code is Command Completed at Target.
+	uint8_t status;
+
+	/// Total AHS length.
+	uint8_t total_ahs_len;
+
+	/// Data segment length.
+	uint8_t ds_len[3];
+
+	/// Reserved for future usage. Always MUST be 0.
+	uint64_t reserved;
+
+	/// Initiator Task Tag (ITT).
+	uint32_t init_task_tag;
+
+	/**
+	 * @brief Copy of the last accepted Selective Negative / Sequence Number Acknowledgment (SNACK) tag.
+	 *
+	 * This field contains a copy of the SNACK Tag of the last SNACK Tag
+	 * accepted by the target on the same connection and for the command for
+	 * which the response is issued. Otherwise, it is reserved and should
+	 * be set to 0.\n
+	 * After issuing a R-Data SNACK, the initiator must discard any SCSI
+	 * status unless contained in a SCSI Response PDU carrying the same
+	 * SNACK Tag as the last issued R-Data SNACK for the SCSI command on the
+	 * current connection.
+	 */
+	uint32_t snack_tag;
+
+	/**
+	 * @brief StatSN - Status Sequence Number.
+	 *
+	 * The StatSN is a sequence number that the target iSCSI layer generates
+	 * per connection and that in turn enables the initiator to acknowledge
+	 * status reception. The StatSN is incremented by 1 for every
+	 * response/status sent on a connection, except for responses sent as a
+	 * result of a retry or SNACK. In the case of responses sent due to a
+	 * retransmission request, the StatSN MUST be the same as the first time
+	 * the PDU was sent, unless the connection has since been restarted.
+	 */
+	uint32_t stat_sn;
+
+	/**
+	 * @brief ExpCmdSN - Next Expected CmdSN from This Initiator.
+	 *
+	 * The ExpCmdSN is a sequence number that the target iSCSI returns to
+	 * the initiator to acknowledge command reception. It is used to update
+	 * a local variable with the same name. An ExpCmdSN equal to
+	 * MaxCmdSN + 1 indicates that the target cannot accept new commands.
+	 */
+	uint32_t exp_cmd_sn;
+
+	/**
+	 * @brief MaxCmdSN - Maximum CmdSN from This Initiator.
+	 *
+	 * The MaxCmdSN is a sequence number that the target iSCSI returns to
+	 * the initiator to indicate the maximum CmdSN the initiator can send.
+	 * It is used to update a local variable with the same name. If the
+	 * MaxCmdSN is equal to ExpCmdSN - 1, this indicates to the initiator
+	 * that the target cannot receive any additional commands. When the
+	 * MaxCmdSN changes at the target while the target has no pending PDUs
+	 * to convey this information to the initiator, it MUST generate a
+	 * NOP-In to carry the new MaxCmdSN.
+	 */
+	uint32_t max_cmd_sn;
+
+	/**
+	 * @brief ExpDataSN or Reserved.
+	 *
+	 * This field indicates the number of Data-In (read) PDUs the target has
+	 * sent for the command.\n
+	 * This field MUST be 0 if the response code is not Command Completed at
+	 * Target or the target sent no Data-In PDUs for the command.
+	 */
+	uint32_t exp_data_sn;
+
+	/**
+	 * @brief Bidirectional Read Residual Count or Reserved.
+	 *
+	 * The Bidirectional Read Residual Count field MUST be valid in the case
+	 * where either the u bit or the o bit is set. If neither bit is set,
+	 * the Bidirectional Read Residual Count field is reserved. Targets may
+	 * set the Bidirectional Read Residual Count, and initiators may use it
+	 * when the response code is Command Completed at Target. If the o bit
+	 * is set, the Bidirectional Read Residual Count indicates the number of
+	 * bytes that were not transferred to the initiator because the
+	 * initiator's Bidirectional Read Expected Data Transfer Length was not
+	 * sufficient. If the u bit is set, the Bidirectional Read Residual
+	 * Count indicates the number of bytes that were not transferred to the
+	 * initiator out of the number of bytes expected to be transferred.
+	 */
+	uint32_t bidi_read_res_cnt;
+
+	/**
+	 * @brief Residual Count or Reserved.
+	 *
+	 * The Residual Count field MUST be valid in the case where either the U
+	 * bit or the O bit is set. If neither bit is set, the Residual Count
+	 * field MUST be ignored on reception and SHOULD be set to 0 when
+	 * sending. Targets may set the residual count, and initiators may use
+	 * it when the response code is Command Completed at Target (even if the
+	 * status returned is not GOOD). If the O bit is set, the Residual
+	 * Count indicates the number of bytes that were not transferred because
+	 * the initiator's Expected Data Transfer Length was not sufficient. If
+	 * the U bit is set, the Residual Count indicates the number of bytes
+	 * that were not transferred out of the number of bytes expected to be
+	 * transferred.
+	 */
+	uint32_t res_cnt;
+
+	/// Optional data segment, command data.
+	iscsi_scsi_ds_cmd_data ds_cmd_data;
 } iscsi_scsi_response_packet;
 
-
-/// Task management request function: ABORT TASK: aborts the task identified by the Referenced Task Tag field.
-#define ISCSI_TASK_MGMT_FUNC_REQ_FUNC_ABORT_TASK         0x01
-
-/// Task management request function: ABORT TASK SET: aborts all tasks issued via this session on the LU.
-#define ISCSI_TASK_MGMT_FUNC_REQ_FUNC_ABORT_TASK_SET     0x02
-
-/// Task management request function: CLEAR ACA - clears the Auto Contingent Allegiance condition.
-#define ISCSI_TASK_MGMT_FUNC_REQ_FUNC_CLEAR_ACA          0x03
-
-/// Task management request function: CLEAR TASK SET - aborts all tasks in the appropriate task set as defined by the TST field in the Control mode page (see SPC3).
-#define ISCSI_TASK_MGMT_FUNC_REQ_FUNC_CLEAR_TASK_SET     0x04
-
-/// Task management request function: LOGICAL UNIT RESET.
-#define ISCSI_TASK_MGMT_FUNC_REQ_FUNC_LOGICAL_UNIT_RESET 0x05
-
-/// Task management request function: TARGET WARM RESET.
-#define ISCSI_TASK_MGMT_FUNC_REQ_FUNC_TARGET_WARM_RESET  0x06
-
-/// Task management request function: TARGET COLD RESET.
-#define ISCSI_TASK_MGMT_FUNC_REQ_FUNC_TARGET_COLD_RESET  0x07
-
-/// Task management request function: TASK REASSIGN - reassigns connection allegiance for the task identified by the Initiator Task Tag field to this connection, thus resuming the iSCSI exchanges for the task.
-#define ISCSI_TASK_MGMT_FUNC_REQ_FUNC_TASK_REASSIGN      0x08
-
-
-/**
- * @brief iSCSI Task Management Function Request packet data.
- *
- * This structure is used to explicity control the execution of one
- * or more tasks (iSCSI and SCSI).
- */
-typedef struct __attribute__((packed)) iscsi_task_mgmt_func_req_packet {
-    /// Always 2 according to iSCSI specification.
-    uint8_t opcode;
-
-    /**
-     * @brief Function.
-     *
-     * The task management functions provide an initiator with a way to
-     * explicitly control the execution of one or more tasks (SCSI and iSCSI
-     * tasks). The task management function codes are listed below. For a
-     * more detailed description of SCSI task management, see SAM2.
-     */
-    int8_t func;
-
-    /// Reserved fot future usage, always MUST be 0.
-    uint16_t reserved;
-
-    /// TotalAHSLength (MUST be 0 for this PDU).
-    uint8_t total_ahs_len;
-
-    /// DataSegmentLength (MUST be 0 for this PDU).
-    uint8_t ds_len[3];
-
-    /**
-     * @brief Logical Unit Number (LUN) or Reserved.
-     *
-     * This field is required for functions that address a specific LU
-     * (ABORT TASK, CLEAR TASK SET, ABORT TASK SET, CLEAR ACA, LOGICAL UNIT
-     * RESET) and is reserved in all others
-     */
-    uint64_t lun;
-
-    /**
-     * @brief Initiator Task Tag (ITT).
-     *
-     * This is the Initiator Task Tag of the task to be aborted for the
-     * ABORT TASK function or reassigned for the TASK REASSIGN function.
-     * For all the other functions, this field MUST be set to the reserved
-     * value 0xFFFFFFFF.
-     */
-    uint32_t init_task_tag;
-
-    /// Referenced task tag or 0xFFFFFFFF.
-    uint32_t ref_task_tag;
-
-    /// CmdSN.
-    uint32_t cmd_sn;
-
-    /// ExpStatSN
-    uint32_t exp_stat_sn;
-
-    /**
-     * @brief RefCmdSN or Reserved.
-     *
-     * If an ABORT TASK is issued for a task created by an immediate
-     * command, then the RefCmdSN MUST be that of the task management
-     * request itself (i.e., the CmdSN and RefCmdSN are equal).\n
-     * For an ABORT TASK of a task created by a non-immediate command, the
-     * RefCmdSN MUST be set to the CmdSN of the task identified by the
-     * Referenced Task Tag field. Targets must use this field when the task
-     * identified by the Referenced Task Tag field is not with the target.
-     * Otherwise, this field is reserved.
-     */
-    uint32_t ref_cmd_sn;
-
-    /**
-     * @brief ExpDataSN or Reserved.
-     *
-     * For recovery purposes, the iSCSI target and initiator maintain a data
-     * acknowledgment reference number - the first input DataSN number
-     * unacknowledged by the initiator. When issuing a new command, this
-     * number is set to 0. If the function is TASK REASSIGN, which
-     * establishes a new connection allegiance for a previously issued read
-     * or bidirectional command, the ExpDataSN will contain an updated data
-     * acknowledgment reference number or the value 0; the latter indicates
-     * that the data acknowledgment reference number is unchanged. The
-     * initiator MUST discard any data PDUs from the previous execution that
-     * it did not acknowledge, and the target MUST transmit all Data-In PDUs
-     * (if any) starting with the data acknowledgment reference number. The
-     * number of retransmitted PDUs may or may not be the same as the
-     * original transmission, depending on if there was a change in
-     * MaxRecvDataSegmentLength in the reassignment. The target MAY also
-     * send no more Data-In PDUs if all data has been acknowledged.
-     * The value of ExpDataSN MUST be 0 or higher than the DataSN of the
-     * last acknowledged Data-In PDU, but not larger than DataSN + 1 of the
-     * last Data-IN PDU sent by the target. Any other value MUST be ignored
-     * by the target.
-     * For other functions, this field is reserved
-     */
-    uint32_t exp_data_sn;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint64_t reserved2;
-
-    /// Optional header digest.
-    iscsi_header_digest hdr_digest;
-} iscsi_task_mgmt_func_req_packet;
-
-
-/// Task management function response: Function complete.
-#define ISCSI_TASK_MGMT_FUNC_RESPONSE_FUNC_COMPLETE               0x00
-
-/// Task management function response: Task does not exist.
-#define ISCSI_TASK_MGMT_FUNC_RESPONSE_TASK_NO_EXIST               0x01
-
-/// Task management function response: LUN does not exist.
-#define ISCSI_TASK_MGMT_FUNC_RESPONSE_LUN_NO_EXIST                0x02
-
-/// Task management function response: Task still allegiant.
-#define ISCSI_TASK_MGMT_FUNC_RESPONSE_TASK_ALLEGIANT              0x03
-
-/// Task management function response: Task allegiance reassignment not supported.
-#define ISCSI_TASK_MGMT_FUNC_RESPONSE_TASK_UNSUPPORTED_ALLEGIANCE 0x04
-
-/// Task management function response: Task management function not supported.
-#define ISCSI_TASK_MGMT_FUNC_RESPONSE_TASK_UNSUPPORTED_MGMT       0x05
-
-/// Task management function response: Function authorization failed.
-#define ISCSI_TASK_MGMT_FUNC_RESPONSE_FUNC_AUTH_FAILED            0x06
-
-/// Task management function response: Function rejected.
-#define ISCSI_TASK_MGMT_FUNC_RESPONSE_FUNC_REJECTED               0xFF
-
-
-/**
- * @brief iSCSI Task Management Function Response packet data.
- *
- * For the functions ABORT TASK, ABORT TASK SET, CLEAR ACA, CLEAR TASK
- * SET, LOGICAL UNIT RESET, TARGET COLD RESET, TARGET WARM RESET, and
- * TASK REASSIGN, the target performs the requested task management
- * function and sends a task management response back to the initiator.
- * For TASK REASSIGN, the new connection allegiance MUST ONLY become
- * effective at the target after the target issues the task management
- * response.
- */
-typedef struct __attribute__((packed)) iscsi_task_mgmt_func_response_packet {
-    /// Always 0x22 according to specification.
-    uint8_t opcode;
-
-    /// Reserved for future usage (always MUST be 0x80 for now).
-    int8_t flags;
-
-    /**
-     * @brief Function response.
-     *
-     * For the TARGET COLD RESET and TARGET WARM RESET functions, the target
-     * cancels all pending operations across all LUs known to the issuing
-     * initiator. For the TARGET COLD RESET function, the target MUST then
-     * close all of its TCP connections to all initiators (terminates all
-     * sessions).\n
-     * The mapping of the response code into a SCSI service response code
-     * value, if needed, is outside the scope of this document. However, in
-     * symbolic terms, Response values 0 and 1 map to the SCSI service
-     * response of FUNCTION COMPLETE. Response value 2 maps to the SCSI
-     * service response of INCORRECT LOGICAL UNIT NUMBER. All other
-     * Response values map to the SCSI service response of FUNCTION
-     * REJECTED. If a Task Management Function Response PDU does not arrive
-     * before the session is terminated, the SCSI service response is
-     * SERVICE DELIVERY OR TARGET FAILURE.\n
-     * The response to ABORT TASK SET and CLEAR TASK SET MUST only be issued
-     * by the target after all of the commands affected have been received
-     * by the target, the corresponding task management functions have been
-     * executed by the SCSI target, and the delivery of all responses
-     * delivered until the task management function completion has been
-     * confirmed (acknowledged through the ExpStatSN) by the initiator on
-     * all connections of this session.\n
-     * For the ABORT TASK function,\n
-     * -# if the Referenced Task Tag identifies a valid task leading to a
-     *    successful termination, then targets must return the "Function
-     *    complete" response.
-     * -# if the Referenced Task Tag does not identify an existing task
-     *    but the CmdSN indicated by the RefCmdSN field in the Task
-     *    Management Function Request is within the valid CmdSN window
-     *    and less than the CmdSN of the Task Management Function Request
-     *    itself, then targets must consider the CmdSN as received and
-     *    return the "Function complete" response.
-     * -# if the Referenced Task Tag does not identify an existing task
-     *    and the CmdSN indicated by the RefCmdSN field in the Task
-     *    Management Function Request is outside the valid CmdSN window,
-     *    then targets must return the "Task does not exist" response
-     */
-    uint8_t response;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint8_t reserved;
-
-    /// TotalAHSLength (MUST be 0 for this PDU).
-    uint8_t total_ahs_len;
-
-    /// DataSegmentLength (MUST be 0 for this PDU).
-    uint8_t ds_len[3];
-
-    /// Reserved for future usage, always MUST be 0.
-    uint64_t reserved2;
-
-    /// Initiator Task Tag (ITT).
-    uint32_t init_task_tag;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint32_t reserved3;
-
-    /// StatSN.
-    uint32_t stat_sn;
-
-    /// ExpCmdSN.
-    uint32_t exp_cmd_sn;
-
-    /// MaxCmdSN.
-    uint32_t max_cmd_sn;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint32_t reserved4;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint64_t reserved5;
-
-    /// Optional header digest.
-    iscsi_header_digest hdr_digest;
-} iscsi_task_mgmt_func_response_packet;
-
 /// SCSI data out / in flags: Immediately process transfer.
 #define ISCSI_SCSI_DATA_OUT_DATA_IN_FLAGS_IMMEDIATE (1 << 7)
 
 /**
- * @brief iSCSI SCSI Data Out request packet data.
- *
- * THis structure is used by iSCSI for SCSI data output
- * requests, i.e. write operations.
- */
-typedef struct __attribute__((packed)) iscsi_scsi_data_out_req_packet {
-    /// Always 2 according to iSCSI specification.
-    uint8_t opcode;
-
-    /// Flags.
-    int8_t flags;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint16_t reserved;
-
-    /// TotalAHSLength.
-    uint8_t total_ahs_len;
-
-    /**
-     * @brief DataSegmentLength.
-     *
-     * This is the data payload length of a SCSI Data-In or SCSI Data-Out
-     * PDU. The sending of 0-length data segments should be avoided, but
-     * initiators and targets MUST be able to properly receive 0-length data
-     * segments.\n
-     * The data segments of Data-In and Data-Out PDUs SHOULD be filled to
-     * the integer number of 4-byte words (real payload), unless the F bit
-     * is set to 1.
-     */
-    uint8_t ds_len[3];
-
-    /**
-     * @brief Logical Unit Number (LUN) or Reserved.
-     *
-     * If the Target Transfer Tag is provided, then the LUN field MUST hold a
-     * valid value and be consistent with whatever was specified with the command;
-     * otherwise, the LUN field is reserved.
-     */
-    uint64_t lun;
-
-    /// Initiator Task Tag (ITT).
-    uint32_t init_task_tag;
-
-    /**
-     * @brief Target Transfer Tag or 0xFFFFFFFF.
-     *
-     * On outgoing data, the Target Transfer Tag is provided to the target
-     * if the transfer is honoring an R2T. In this case, the Target
-     * Transfer Tag field is a replica of the Target Transfer Tag provided
-     * with the R2T.\n
-     * The Target Transfer Tag values are not specified by this protocol,
-     * except that the value 0xFFFFFFFF is reserved and means that the
-     * Target Transfer Tag is not supplied.
-     */
-    uint32_t target_xfer_tag;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint32_t reserved2;
-
-    /// ExpStatSN.
-    uint32_t exp_stat_sn;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint32_t reserved3;
-
-    /**
-     * @brief DataSN.
-     *
-     * For output (write) data PDUs, the DataSN is the Data-Out PDU number
-     * within the current output sequence. Either the current output
-     * sequence is identified by the Initiator Task Tag (for unsolicited
-     * data) or it is a data sequence generated for one R2T (for data
-     * solicited through R2T).
-     */
-    uint32_t data_sn;
-
-    /**
-     * @brief Buffer Offset.
-     *
-     * The Buffer Offset field contains the offset of this PDU payload data
-     * within the complete data transfer. The sum of the buffer offset and
-     * length should not exceed the expected transfer length for the
-     * command.\n
-     * The order of data PDUs within a sequence is determined by
-     * DataPDUInOrder. When set to Yes, it means that PDUs have to be in
-     * increasing buffer offset order and overlays are forbidden.\n
-     * The ordering between sequences is determined by DataSequenceInOrder.
-     * When set to Yes, it means that sequences have to be in increasing
-     * buffer offset order and overlays are forbidden.
-     */
-    uint32_t buf_offset;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint32_t reserved4;
-
-    /// Optional header digest.
-    iscsi_header_digest hdr_digest;
-
-    /// Data segment.
-    iscsi_scsi_ds_cmd_data ds_cmd_data;
-
-    /// Optional data digest.
-    iscsi_data_digest data_digest;
-} iscsi_scsi_data_out_req_packet;
-
-/**
  * @brief SCSI Data In reponse flags: Status.
  *
  * (S) set to indicate that the Command Status field
@@ -5822,437 +3790,115 @@ typedef struct __attribute__((packed)) iscsi_scsi_data_out_req_packet {
  * responses, i.e. read operations.
  */
 typedef struct __attribute__((packed)) iscsi_scsi_data_in_response_packet {
-    /// Always 0x25 according to iSCSI specification.
-    uint8_t opcode;
-
-    /// Incoming data flags. The fields StatSN, Status, and Residual Count only have meaningful content if the S bit is set to 1.
-    int8_t flags;
-
-    /// Rserved for future usage, always MUST be 0.
-    uint8_t reserved;
-
-    /**
-     * @brief Status or Reserved.
-     *
-     * Status can accompany the last Data-In PDU if the command did not end
-     * with an exception (i.e., the status is "good status" - GOOD,
-     * CONDITION MET, or INTERMEDIATE-CONDITION MET). The presence of
-     * status (and of a residual count) is signaled via the S flag bit.
-     * Although targets MAY choose to send even non-exception status in
-     * separate responses, initiators MUST support non-exception status in
-     * Data-In PDUs.
-     */
-    uint8_t status;
-
-    /// TotalAHSLength.
-    uint8_t total_ahs_len;
-
-    /**
-     * @brief DataSegmentLength.
-     *
-     * This is the data payload length of a SCSI Data-In or SCSI Data-Out
-     * PDU. The sending of 0-length data segments should be avoided, but
-     * initiators and targets MUST be able to properly receive 0-length data
-     * segments.\n
-     * The data segments of Data-In and Data-Out PDUs SHOULD be filled to
-     * the integer number of 4-byte words (real payload), unless the F bit
-     * is set to 1.
-     */
-    uint8_t ds_len[3];
-
-    /**
-     * @brief Logical Unit Number (LUN) or Reserved.
-     *
-     * If the Target Transfer Tag is provided, then the LUN field MUST hold a
-     * valid value and be consistent with whatever was specified with the command;
-     * otherwise, the LUN field is reserved.
-     */
-    uint64_t lun;
-
-    /// Initiator Task Tag (ITT).
-    uint32_t init_task_tag;
-
-    /**
-     * @brief Target Transfer Tag or 0xFFFFFFFF.
-     *
-     * On incoming data, the Target Transfer Tag and LUN MUST be provided by
-     * the target if the A bit is set to 1; otherwise, they are reserved.
-     * The Target Transfer Tag and LUN are copied by the initiator into the
-     * SNACK of type DataACK that it issues as a result of receiving a SCSI
-     * Data-In PDU with the A bit set to 1.\n
-     * The Target Transfer Tag values are not specified by this protocol,
-     * except that the value 0xFFFFFFFF is reserved and means that the
-     * Target Transfer Tag is not supplied.
-     */
-    uint32_t target_xfer_tag;
-
-    /// StatSN.
-    uint32_t stat_sn;
-
-    /// ExpCmdSN.
-
-    uint32_t exp_cmd_sn;
-
-    /// MaxCmdSN.
-    uint32_t max_cmd_sn;
-
-    /**
-     * @brief DataSN.
-     *
-     * For input (read) or bidirectional Data-In PDUs, the DataSN is the
-     * input PDU number within the data transfer for the command identified
-     * by the Initiator Task Tag.\n
-     * R2T and Data-In PDUs, in the context of bidirectional commands, share
-     * the numbering sequence.
-     */
-    uint32_t data_sn;
-
-    /**
-     * @brief Buffer Offset.
-     *
-     * The Buffer Offset field contains the offset of this PDU payload data
-     * within the complete data transfer. The sum of the buffer offset and
-     * length should not exceed the expected transfer length for the
-     * command.\n
-     * The order of data PDUs within a sequence is determined by
-     * DataPDUInOrder. When set to Yes, it means that PDUs have to be in
-     * increasing buffer offset order and overlays are forbidden.\n
-     * The ordering between sequences is determined by DataSequenceInOrder.
-     * When set to Yes, it means that sequences have to be in increasing
-     * buffer offset order and overlays are forbidden.
-     */
-    uint32_t buf_offset;
-
-    /// Residual Count or Reserved.
-    uint32_t res_cnt;
-
-    /// Optional header digest.
-    iscsi_header_digest hdr_digest;
-
-    /// Data segment.
-    iscsi_scsi_ds_cmd_data ds_cmd_data;
-
-    /// Optional data digest.
-    iscsi_data_digest data_digest;
+	/// Always 0x25 according to iSCSI specification.
+	uint8_t opcode;
+
+	/// Incoming data flags. The fields StatSN, Status, and Residual Count only have meaningful content if the S bit is set to 1.
+	int8_t flags;
+
+	/// Rserved for future usage, always MUST be 0.
+	uint8_t reserved;
+
+	/**
+	 * @brief Status or Reserved.
+	 *
+	 * Status can accompany the last Data-In PDU if the command did not end
+	 * with an exception (i.e., the status is "good status" - GOOD,
+	 * CONDITION MET, or INTERMEDIATE-CONDITION MET). The presence of
+	 * status (and of a residual count) is signaled via the S flag bit.
+	 * Although targets MAY choose to send even non-exception status in
+	 * separate responses, initiators MUST support non-exception status in
+	 * Data-In PDUs.
+	 */
+	uint8_t status;
+
+	/// TotalAHSLength.
+	uint8_t total_ahs_len;
+
+	/**
+	 * @brief DataSegmentLength.
+	 *
+	 * This is the data payload length of a SCSI Data-In or SCSI Data-Out
+	 * PDU. The sending of 0-length data segments should be avoided, but
+	 * initiators and targets MUST be able to properly receive 0-length data
+	 * segments.\n
+	 * The data segments of Data-In and Data-Out PDUs SHOULD be filled to
+	 * the integer number of 4-byte words (real payload), unless the F bit
+	 * is set to 1.
+	 */
+	uint8_t ds_len[3];
+
+	/**
+	 * @brief Logical Unit Number (LUN) or Reserved.
+	 *
+	 * If the Target Transfer Tag is provided, then the LUN field MUST hold a
+	 * valid value and be consistent with whatever was specified with the command;
+	 * otherwise, the LUN field is reserved.
+	 */
+	uint64_t lun;
+
+	/// Initiator Task Tag (ITT).
+	uint32_t init_task_tag;
+
+	/**
+	 * @brief Target Transfer Tag or 0xFFFFFFFF.
+	 *
+	 * On incoming data, the Target Transfer Tag and LUN MUST be provided by
+	 * the target if the A bit is set to 1; otherwise, they are reserved.
+	 * The Target Transfer Tag and LUN are copied by the initiator into the
+	 * SNACK of type DataACK that it issues as a result of receiving a SCSI
+	 * Data-In PDU with the A bit set to 1.\n
+	 * The Target Transfer Tag values are not specified by this protocol,
+	 * except that the value 0xFFFFFFFF is reserved and means that the
+	 * Target Transfer Tag is not supplied.
+	 */
+	uint32_t target_xfer_tag;
+
+	/// StatSN.
+	uint32_t stat_sn;
+
+	/// ExpCmdSN.
+
+	uint32_t exp_cmd_sn;
+
+	/// MaxCmdSN.
+	uint32_t max_cmd_sn;
+
+	/**
+	 * @brief DataSN.
+	 *
+	 * For input (read) or bidirectional Data-In PDUs, the DataSN is the
+	 * input PDU number within the data transfer for the command identified
+	 * by the Initiator Task Tag.\n
+	 * R2T and Data-In PDUs, in the context of bidirectional commands, share
+	 * the numbering sequence.
+	 */
+	uint32_t data_sn;
+
+	/**
+	 * @brief Buffer Offset.
+	 *
+	 * The Buffer Offset field contains the offset of this PDU payload data
+	 * within the complete data transfer. The sum of the buffer offset and
+	 * length should not exceed the expected transfer length for the
+	 * command.\n
+	 * The order of data PDUs within a sequence is determined by
+	 * DataPDUInOrder. When set to Yes, it means that PDUs have to be in
+	 * increasing buffer offset order and overlays are forbidden.\n
+	 * The ordering between sequences is determined by DataSequenceInOrder.
+	 * When set to Yes, it means that sequences have to be in increasing
+	 * buffer offset order and overlays are forbidden.
+	 */
+	uint32_t buf_offset;
+
+	/// Residual Count or Reserved.
+	uint32_t res_cnt;
+
+	/// Data segment.
+	iscsi_scsi_ds_cmd_data ds_cmd_data;
 } iscsi_scsi_data_in_response_packet;
 
 /**
- * @brief iSCSI Ready To Transfer packet data.
- *
- * When an initiator has submitted a SCSI command with data that passes
- * from the initiator to the target (write), the target may specify
- * which blocks of data it is ready to receive. The target may request
- * that the data blocks be delivered in whichever order is convenient
- * for the target at that particular instant. This information is
- * passed from the target to the initiator in the Ready To Transfer
- * (R2T) PDU.
- *
- * In order to allow write operations without an explicit initial R2T,
- * the initiator and target MUST have negotiated the key InitialR2T to
- * No during login.
- *
- * An R2T MAY be answered with one or more SCSI Data-Out PDUs with a
- * matching Target Transfer Tag. If an R2T is answered with a single
- * Data-Out PDU, the buffer offset in the data PDU MUST be the same as
- * the one specified by the R2T, and the data length of the data PDU
- * MUST be the same as the Desired Data Transfer Length specified in the
- * R2T. If the R2T is answered with a sequence of data PDUs, the buffer
- * offset and length MUST be within the range of those specified by the
- * R2T, and the last PDU MUST have the F bit set to 1. If the last PDU
- * (marked with the F bit) is received before the Desired Data Transfer
- * Length is transferred, a target MAY choose to reject that PDU with
- * the "Protocol Error" reason code. DataPDUInOrder governs the
- * Data-Out PDU ordering. If DataPDUInOrder is set to Yes, the buffer
- * offsets and lengths for consecutive PDUs MUST form a continuous
- * non-overlapping range, and the PDUs MUST be sent in increasing offset
- * order.
- *
- * The target may send several R2T PDUs. It therefore can have a number
- * of pending data transfers. The number of outstanding R2T PDUs is
- * limited by the value of the negotiated key MaxOutstandingR2T. Within
- * a task, outstanding R2Ts MUST be fulfilled by the initiator in the
- * order in which they were received.
- *
- * R2T PDUs MAY also be used to recover Data-Out PDUs. Such an R2T
- * (Recovery-R2T) is generated by a target upon detecting the loss of
- * one or more Data-Out PDUs due to:
- *
- *    - Digest error
- *
- *    - Sequence error
- *
- *    - Sequence reception timeout
- *
- * A Recovery-R2T carries the next unused R2TSN but requests part of or
- * the entire data burst that an earlier R2T (with a lower R2TSN) had
- * already requested.
- *
- * DataSequenceInOrder governs the buffer offset ordering in consecutive
- * R2Ts. If DataSequenceInOrder is Yes, then consecutive R2Ts MUST
- * refer to continuous non-overlapping ranges, except for Recovery-R2Ts.
- */
-typedef struct __attribute__((packed)) iscsi_r2t_packet {
-    /// Always 0x31 according to iSCSI specification.
-    uint8_t opcode;
-
-    /// Reserved for future usage (always MUST be 0x80 for now).
-    int8_t flags;
-
-    /// Reserved for future usage, always MUST be 0 for now.
-    uint16_t reserved;
-
-    /// TotalAHSLength, MUST be 0 for this PDU.
-    uint8_t total_ahs_len;
-
-    /// DataSegmentLength, MUST be 0 0 for this PDU.
-    uint8_t ds_len[3];
-
-    /// Logical Unit Number (LUN) or Reserved.
-    uint64_t lun;
-
-    /// Initiator Task Tag (ITT).
-    uint32_t init_task_tag;
-
-    /// Target Transfer Tag (TTT).
-    uint32_t target_xfer_tag;
-
-    /// The StatSN field will contain the next StatSN. The StatSN for this connection is not advanced after this PDU is sent.
-    uint32_t stat_sn;
-
-    /// ExpCmdSN.
-    uint32_t exp_cmd_sn;
-
-    /// MaxCmdSN.
-    uint32_t max_cmd_sn;
-
-    /// DataSN.
-    uint32_t data_sn;
-
-    /// Ready To Transfer Sequence Number (R2TSN) is the R2T PDU input PDU number within the command identified by the Initiator Task Tag. For bidirectional commands, R2T and Data-In PDUs share the input PDU numbering sequence.
-    uint32_t r2t_sn;
-
-    /**
-     * @brief Buffer Offset.
-     *
-     * The target therefore also specifies a buffer offset that indicates
-     * the point at which the data transfer should begin, relative to the
-     * beginning of the total data transfer.
-     */
-    uint32_t buf_offset;
-
-    /**
-     * @brief Desired Data Transfer Length.
-     *
-     * The target specifies how many bytes it wants the initiator to send
-     * because of this R2T PDU. The target may request the data from the
-     * initiator in several chunks, not necessarily in the original order of
-     * the data. The Desired Data Transfer Length MUST NOT be 0 and MUST NOT
-     * exceed MaxBurstLength.
-     */
-    uint32_t des_data_xfer_len;
-
-    /// Optional header digest.
-    iscsi_header_digest hdr_digest;
-} iscsi_r2t_packet;
-
-
-/**
- * @brief SCSI Asynchronous Message Event: SCSI Async Event.
- *
- * A SCSI asynchronous event is reported in the sense data.
- * Sense Data that accompanies the report, in the data
- * segment, identifies the condition. The sending of a
- * SCSI event ("asynchronous event reporting" in SCSI
- * terminology) is dependent on the target support for SCSI
- * asynchronous event reporting as indicated in the
- * standard INQUIRY data. Its use may be enabled by
- * parameters in the SCSI Control mode page.
- */
-#define ISCSI_ASYNC_MSG_EVENT_SCSI_ASYNC_EVENT    0x00
-
-/**
- * @brief SCSI Asynchronous Message Event: Logout Request.
- *
- * The target requests Logout. This Async Message MUST
- * be sent on the same connection as the one requesting
- * to be logged out. The initiator MUST honor this request
- * by issuing a Logout as early as possible but no later
- * than Parameter3 seconds. The initiator MUST send a Logout
- * with a reason code of "close the connection" OR "close the
- * session" to close all the connections. Once this message is
- * received, the initiator SHOULD NOT issue new iSCSI commands on
- * the connection to be logged out. The target MAY reject any
- * new I/O requests that it receives after this message with the
- * reason code "Waiting for Logout". If the initiator does not
- * log out in Parameter3 seconds, the target should send an Async
- * PDU with iSCSI event code "Dropped the connection" if possible
- * or simply terminate the transport connection. Parameter1 and
- * Parameter2 are reserved.
- */
-#define ISCSI_ASYNC_MSG_EVENT_LOGOUT_REQUEST      0x01
-
-/**
- * @brief SCSI Asynchronous Message Event: Connection Drop Notification.
- *
- * The target indicates that it will drop the connection.
- * The Parameter1 field indicates the CID of the connection that
- * is going to be dropped.\n
- * The Parameter2 field (Time2Wait) indicates, in seconds, the
- * minimum time to wait before attempting to reconnect or
- * reassign.\n
- * The Parameter3 field (Time2Retain) indicates the maximum time
- * allowed to reassign commands after the initial wait (in
- * Parameter2).\n
- * If the initiator does not attempt to reconnect and/or reassign
- * the outstanding commands within the time specified by
- * Parameter3, or if Parameter3 is 0, the target will terminate
- * all outstanding commands on this connection. In this case, no
- * other responses should be expected from the target for the
- * outstanding commands on this connection.\n
- * A value of 0 for Parameter2 indicates that reconnect can be
- * attempted immediately.
- */
-#define ISCSI_ASYNC_MSG_EVENT_CONNECT_DROP_NOTIFY 0x02
-
-/**
- * @brief SCSI Asynchronous Message Event: Session Drop Notification.
- *
- * The target indicates that it will drop all the connections
- * of this session.\n
- * The Parameter1 field is reserved.\n
- * The Parameter2 field (Time2Wait) indicates, in seconds, the
- * minimum time to wait before attempting to reconnect.\n
- * The Parameter3 field (Time2Retain) indicates the maximum time
- * allowed to reassign commands after the initial wait (in
- * Parameter2).\n
- * If the initiator does not attempt to reconnect and/or reassign
- * the outstanding commands within the time specified by
- * Parameter3, or if Parameter3 is 0, the session is terminated.\n
- * In this case, the target will terminate all outstanding
- * commands in this session; no other responses should be
- * expected from the target for the outstanding commands in this
- * session. A value of 0 for Parameter2 indicates that reconnect
- * can be attempted immediately.
- */
-#define ISCSI_ASYNC_MSG_EVENT_SESSION_DROP_NOTIFY 0x03
-
-/**
- * @brief SCSI Asynchronous Message Event: Negotiation Request.
- *
- * The target requests parameter negotiation on this connection.
- * The initiator MUST honor this request by issuing a Text
- * Request (that can be empty) on the same connection as early
- * as possible, but no later than Parameter3 seconds, unless a
- * Text Request is already pending on the connection, or by
- * issuing a Logout Request. If the initiator does not issue a
- * Text Request, the target may reissue the Asynchronous Message
- * requesting parameter negotiation.
- */
-#define ISCSI_ASYNC_MSG_EVENT_NEGOTIATION_REQUEST 0x04
-
-/**
- * @brief SCSI Asynchronous Message Event: Task Termination.
- *
- * All active tasks for a LU with a matching LUN field in the
- * Async Message PDU are being terminated. The receiving
- * initiator iSCSI layer MUST respond to this message by
- * taking the following steps, in order:
- * - Stop Data-Out transfers on that connection for all active
- *   TTTs for the affected LUN quoted in the Async Message PDU.
- * - Acknowledge the StatSN of the Async Message PDU via a
- *   NOP-Out PDU with ITT=0xFFFFFFFF (i.e., non-ping flavor),
- *   while copying the LUN field from the Async Message to
- *   NOP-Out.
- * This value of AsyncEvent, however, MUST NOT be used on an
- * iSCSI session unless the new TaskReporting text key was
- * negotiated to FastAbort on the session.
- */
-#define ISCSI_ASYNC_MSG_EVENT_TASK_TERMINATION    0x05
-
-/// SCSI Asynchronous Message Event: First vendor-specific iSCSI event. The AsyncVCode details the vendor code, and data MAY accompany the report.
-#define ISCSI_ASYNC_MSG_EVENT_VENDOR_FIRST        0xF8
-
-/// SCSI Asynchronous Message Event: Last vendor-specific iSCSI event. The AsyncVCode details the vendor code, and data MAY accompany the report.
-#define ISCSI_ASYNC_MSG_EVENT_VENDOR_LAST         0xFF
-
-/**
- * @brief iSCSI Asynchronous Message packet data.
- *
- * An Asynchronous Message may be sent from the target to the initiator
- * without corresponding to a particular command. The target specifies
- * the reason for the event and sense data.\n
- * Some Asynchronous Messages are strictly related to iSCSI, while
- * others are related to SCSI
- */
-typedef struct __attribute__((packed)) iscsi_async_msg_packet {
-    /// Always 0x32 according to iSCSI specification.
-    uint8_t opcode;
-
-    /// Reserved for future usage (always MUST be 0x80 for now).
-    int8_t flags;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint16_t reserved;
-
-    /// TotalAHSLength, MUST be 0 for this PDU.
-    uint8_t total_ahs_len;
-
-    /// DataSegmentLength, MUST be 0 0 for this PDU.
-    uint8_t ds_len[3];
-
-    /// The LUN field MUST be valid if AsyncEvent is 0. Otherwise, this field is reserved.
-    uint64_t lun;
-
-    /// Tag (always 0xFFFFFFFF for now).
-    uint32_t tag;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint32_t reserved2;
-
-    /**
-     * @brief StatSN.
-     *
-     * The StatSN counts this PDU as an acknowledgeable event (the StatSN is
-     * advanced), which allows for initiator and target state synchronization.
-     */
-    uint32_t stat_sn;
-
-    /// ExpCmdSN.
-    uint32_t exp_cmd_sn;
-
-    /// MaxCmdSN.
-    uint32_t max_cmd_sn;
-
-    /// AsyncEvent.
-    uint8_t async_event;
-
-    /// AsyncVCode is a vendor-specific detail code that is only valid if the AsyncEvent field indicates a vendor-specific event. Otherwise, it is reserved.
-    uint8_t async_vcode;
-
-    /// Parameter1 or Reserved.
-    uint16_t param_1;
-
-    /// Parameter2 or Reserved.
-    uint16_t param_2;
-
-    /// Parameter3 or Reserved.
-    uint16_t param_3;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint32_t reserved3;
-
-    /// Optional header digest.
-    iscsi_header_digest hdr_digest;
-
-    /// Data segment.
-    iscsi_scsi_ds_cmd_data ds_cmd_data;
-
-    /// Optional data digest.
-    iscsi_data_digest data_digest;
-} iscsi_async_msg_packet;
-
-
-/**
  * @brief Text Request flags: Continue.
  *
  * (C) When set to 1, this bit indicates that the text (set of key=value
@@ -6287,106 +3933,100 @@ typedef struct __attribute__((packed)) iscsi_async_msg_packet {
  * implicitly terminated by the target.
  */
 typedef struct __attribute__((packed)) iscsi_text_req_packet {
-    /// Always 0x04 according to iSCSI specification.
-    uint8_t opcode;
-
-    /// Text request flags.
-    int8_t flags;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint16_t reserved;
-
-    /// TotalAHSLength.
-    uint8_t total_ahs_len;
-
-    /// DataSegmentLength.
-    uint8_t ds_len[3];
-
-    /// Logical Unit Number (LUN) or Reserved.
-    uint64_t lun;
-
-    /**
-     * @brief Initiator Task Tag (ITT).
-     *
-     * This is the initiator-assigned identifier for this Text Request. If
-     * the command is sent as part of a sequence of Text Requests and
-     * responses, the Initiator Task Tag MUST be the same for all the
-     * requests within the sequence (similar to linked SCSI commands). The
-     * I bit for all requests in a sequence also MUST be the same.
-     */
-    uint32_t init_task_tag;
-
-    /**
-     * @brief Target Transfer Tag (TTT).
-     *
-     * When the Target Transfer Tag is set to the reserved value 0xFFFFFFFF,
-     * it tells the target that this is a new request, and the target resets
-     * any internal state associated with the Initiator Task Tag (resets the
-     * current negotiation state).\n
-     * The target sets the Target Transfer Tag in a Text Response to a value
-     * other than the reserved value 0xFFFFFFFF whenever it indicates that
-     * it has more data to send or more operations to perform that are
-     * associated with the specified Initiator Task Tag. It MUST do so
-     * whenever it sets the F bit to 0 in the response. By copying the
-     * Target Transfer Tag from the response to the next Text Request, the
-     * initiator tells the target to continue the operation for the specific
-     * Initiator Task Tag. The initiator MUST ignore the Target Transfer
-     * Tag in the Text Response when the F bit is set to 1.\n
-     * This mechanism allows the initiator and target to transfer a large
-     * amount of textual data over a sequence of text-command/text-response
-     * exchanges or to perform extended negotiation sequences.\n
-     * If the Target Transfer Tag is not 0xFFFFFFFF, the LUN field MUST be
-     * sent by the target in the Text Response.\n
-     * A target MAY reset its internal negotiation state if an exchange is
-     * stalled by the initiator for a long time or if it is running out of
-     * resources.\n
-     * Long Text Responses are handled as shown in the following example:\n
-     * @verbatim
-     *    I->T Text SendTargets=All (F = 1, TTT = 0xFFFFFFFF)
-     *    T->I Text <part 1> (F = 0, TTT = 0x12345678)
-     *    I->T Text <empty> (F = 1, TTT = 0x12345678)
-     *    T->I Text <part 2> (F = 0, TTT = 0x12345678)
-     *    I->T Text <empty> (F = 1, TTT = 0x12345678)
-     *    ...
-     *    T->I Text <part n> (F = 1, TTT = 0xFFFFFFFF)
-     * @endverbatim
-     */
-    uint32_t target_xfer_tag;
-
-    /// CmdSN.
-    uint32_t cmd_sn;
-
-    /// ExpStatSN.
-    uint32_t exp_stat_sn;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint64_t reserved2[2];
-
-    /// Optional header digest.
-    iscsi_header_digest hdr_digest;
-
-    /**
-     * @brief Data segment.
-     *
-     * The data lengths of a Text Request MUST NOT exceed the iSCSI target
-     * MaxRecvDataSegmentLength (a parameter that is negotiated per
-     * connection and per direction).\n
-     * A key=value pair can span Text Request or Text Response boundaries.
-     * A key=value pair can start in one PDU and continue on the next. In
-     * other words, the end of a PDU does not necessarily signal the end of
-     * a key=value pair.\n
-     * The target responds by sending its response back to the initiator.
-     * The response text format is similar to the request text format. The
-     * Text Response MAY refer to key=value pairs presented in an earlier
-     * Text Request, and the text in the request may refer to earlier
-     * responses.\n
-     * Text operations are usually meant for parameter setting/negotiations
-     * but can also be used to perform some long-lasting operations.
-     */
-    iscsi_scsi_ds_cmd_data ds_cmd_data;
-
-    /// Optional data digest.
-    iscsi_data_digest data_digest;
+	/// Always 0x04 according to iSCSI specification.
+	uint8_t opcode;
+
+	/// Text request flags.
+	int8_t flags;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint16_t reserved;
+
+	/// TotalAHSLength.
+	uint8_t total_ahs_len;
+
+	/// DataSegmentLength.
+	uint8_t ds_len[3];
+
+	/// Logical Unit Number (LUN) or Reserved.
+	uint64_t lun;
+
+	/**
+	 * @brief Initiator Task Tag (ITT).
+	 *
+	 * This is the initiator-assigned identifier for this Text Request. If
+	 * the command is sent as part of a sequence of Text Requests and
+	 * responses, the Initiator Task Tag MUST be the same for all the
+	 * requests within the sequence (similar to linked SCSI commands). The
+	 * I bit for all requests in a sequence also MUST be the same.
+	 */
+	uint32_t init_task_tag;
+
+	/**
+	 * @brief Target Transfer Tag (TTT).
+	 *
+	 * When the Target Transfer Tag is set to the reserved value 0xFFFFFFFF,
+	 * it tells the target that this is a new request, and the target resets
+	 * any internal state associated with the Initiator Task Tag (resets the
+	 * current negotiation state).\n
+	 * The target sets the Target Transfer Tag in a Text Response to a value
+	 * other than the reserved value 0xFFFFFFFF whenever it indicates that
+	 * it has more data to send or more operations to perform that are
+	 * associated with the specified Initiator Task Tag. It MUST do so
+	 * whenever it sets the F bit to 0 in the response. By copying the
+	 * Target Transfer Tag from the response to the next Text Request, the
+	 * initiator tells the target to continue the operation for the specific
+	 * Initiator Task Tag. The initiator MUST ignore the Target Transfer
+	 * Tag in the Text Response when the F bit is set to 1.\n
+	 * This mechanism allows the initiator and target to transfer a large
+	 * amount of textual data over a sequence of text-command/text-response
+	 * exchanges or to perform extended negotiation sequences.\n
+	 * If the Target Transfer Tag is not 0xFFFFFFFF, the LUN field MUST be
+	 * sent by the target in the Text Response.\n
+	 * A target MAY reset its internal negotiation state if an exchange is
+	 * stalled by the initiator for a long time or if it is running out of
+	 * resources.\n
+	 * Long Text Responses are handled as shown in the following example:\n
+	 * @verbatim
+	 *    I->T Text SendTargets=All (F = 1, TTT = 0xFFFFFFFF)
+	 *    T->I Text <part 1> (F = 0, TTT = 0x12345678)
+	 *    I->T Text <empty> (F = 1, TTT = 0x12345678)
+	 *    T->I Text <part 2> (F = 0, TTT = 0x12345678)
+	 *    I->T Text <empty> (F = 1, TTT = 0x12345678)
+	 *    ...
+	 *    T->I Text <part n> (F = 1, TTT = 0xFFFFFFFF)
+	 * @endverbatim
+	 */
+	uint32_t target_xfer_tag;
+
+	/// CmdSN.
+	uint32_t cmd_sn;
+
+	/// ExpStatSN.
+	uint32_t exp_stat_sn;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint64_t reserved2[2];
+
+	/**
+	 * @brief Data segment.
+	 *
+	 * The data lengths of a Text Request MUST NOT exceed the iSCSI target
+	 * MaxRecvDataSegmentLength (a parameter that is negotiated per
+	 * connection and per direction).\n
+	 * A key=value pair can span Text Request or Text Response boundaries.
+	 * A key=value pair can start in one PDU and continue on the next. In
+	 * other words, the end of a PDU does not necessarily signal the end of
+	 * a key=value pair.\n
+	 * The target responds by sending its response back to the initiator.
+	 * The response text format is similar to the request text format. The
+	 * Text Response MAY refer to key=value pairs presented in an earlier
+	 * Text Request, and the text in the request may refer to earlier
+	 * responses.\n
+	 * Text operations are usually meant for parameter setting/negotiations
+	 * but can also be used to perform some long-lasting operations.
+	 */
+	iscsi_scsi_ds_cmd_data ds_cmd_data;
 } iscsi_text_req_packet;
 
 
@@ -6428,87 +4068,81 @@ typedef struct __attribute__((packed)) iscsi_text_req_packet {
  * of the Text Request.
  */
 typedef struct __attribute__((packed)) iscsi_text_response_packet {
-    /// Always 0x24 according to iSCSI specification.
-    uint8_t opcode;
-
-    /// Text response flags.
-    int8_t flags;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint16_t reserved;
-
-    /// TotalAHSLength.
-    uint8_t total_ahs_len;
-
-    /// DataSegmentLength.
-    uint8_t ds_len[3];
-
-    /// Logical Unit Number (LUN) or Reserved.
-    uint64_t lun;
-
-    /// The Initiator Task Tag matches the tag used in the initial Text Request.
-    uint32_t init_task_tag;
-
-    /**
-     * @brief Target Transfer Tag (TTT).
-     *
-     * When a target has more work to do (e.g., cannot transfer all the
-     * remaining text data in a single Text Response or has to continue the
-     * negotiation) and has enough resources to proceed, it MUST set the
-     * Target Transfer Tag to a value other than the reserved value
-     * 0xFFFFFFFF. Otherwise, the Target Transfer Tag MUST be set to
-     * 0xFFFFFFFF.\n
-     * When the Target Transfer Tag is not 0xFFFFFFFF, the LUN field may be
-     * significant.\n
-     * The initiator MUST copy the Target Transfer Tag and LUN in its next
-     * request to indicate that it wants the rest of the data.\n
-     * When the target receives a Text Request with the Target Transfer Tag
-     * set to the reserved value 0xFFFFFFFF, it resets its internal
-     * information (resets state) associated with the given Initiator Task
-     * Tag (restarts the negotiation).\n
-     * When a target cannot finish the operation in a single Text Response
-     * and does not have enough resources to continue, it rejects the Text
-     * Request with the appropriate Reject code.\n
-     * A target may reset its internal state associated with an Initiator
-     * Task Tag (the current negotiation state) as expressed through the
-     * Target Transfer Tag if the initiator fails to continue the exchange
-     * for some time. The target may reject subsequent Text Requests with
-     * the Target Transfer Tag set to the "stale" value.
-     */
-    uint32_t target_xfer_tag;
-
-    /// StatSN. The target StatSN variable is advanced by each Text Response sent.
-    uint32_t stat_sn;
-
-    /// ExpCmdSN.
-    uint32_t exp_cmd_sn;
-
-    /// MaxCmdSN.
-    uint32_t max_cmd_sn;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint64_t reserved2[2];
-
-    /// Optional header digest.
-    iscsi_header_digest hdr_digest;
-
-    /**
-     * @brief Data segment.
-     *
-     * The data lengths of a Text Response MUST NOT exceed the iSCSI
-     * initiator MaxRecvDataSegmentLength (a parameter that is negotiated
-     * per connection and per direction).\n
-     * The text in the Text Response Data is governed by the same rules as
-     * the text in the Text Request Data.\n
-     * Although the initiator is the requesting party and controls the
-     * request-response initiation and termination, the target can offer
-     * key=value pairs of its own as part of a sequence and not only in
-     * response to the initiator.
-     */
-    iscsi_scsi_ds_cmd_data ds_cmd_data;
-
-    /// Optional data digest.
-    iscsi_data_digest data_digest;
+	/// Always 0x24 according to iSCSI specification.
+	uint8_t opcode;
+
+	/// Text response flags.
+	int8_t flags;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint16_t reserved;
+
+	/// TotalAHSLength.
+	uint8_t total_ahs_len;
+
+	/// DataSegmentLength.
+	uint8_t ds_len[3];
+
+	/// Logical Unit Number (LUN) or Reserved.
+	uint64_t lun;
+
+	/// The Initiator Task Tag matches the tag used in the initial Text Request.
+	uint32_t init_task_tag;
+
+	/**
+	 * @brief Target Transfer Tag (TTT).
+	 *
+	 * When a target has more work to do (e.g., cannot transfer all the
+	 * remaining text data in a single Text Response or has to continue the
+	 * negotiation) and has enough resources to proceed, it MUST set the
+	 * Target Transfer Tag to a value other than the reserved value
+	 * 0xFFFFFFFF. Otherwise, the Target Transfer Tag MUST be set to
+	 * 0xFFFFFFFF.\n
+	 * When the Target Transfer Tag is not 0xFFFFFFFF, the LUN field may be
+	 * significant.\n
+	 * The initiator MUST copy the Target Transfer Tag and LUN in its next
+	 * request to indicate that it wants the rest of the data.\n
+	 * When the target receives a Text Request with the Target Transfer Tag
+	 * set to the reserved value 0xFFFFFFFF, it resets its internal
+	 * information (resets state) associated with the given Initiator Task
+	 * Tag (restarts the negotiation).\n
+	 * When a target cannot finish the operation in a single Text Response
+	 * and does not have enough resources to continue, it rejects the Text
+	 * Request with the appropriate Reject code.\n
+	 * A target may reset its internal state associated with an Initiator
+	 * Task Tag (the current negotiation state) as expressed through the
+	 * Target Transfer Tag if the initiator fails to continue the exchange
+	 * for some time. The target may reject subsequent Text Requests with
+	 * the Target Transfer Tag set to the "stale" value.
+	 */
+	uint32_t target_xfer_tag;
+
+	/// StatSN. The target StatSN variable is advanced by each Text Response sent.
+	uint32_t stat_sn;
+
+	/// ExpCmdSN.
+	uint32_t exp_cmd_sn;
+
+	/// MaxCmdSN.
+	uint32_t max_cmd_sn;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint64_t reserved2[2];
+
+	/**
+	 * @brief Data segment.
+	 *
+	 * The data lengths of a Text Response MUST NOT exceed the iSCSI
+	 * initiator MaxRecvDataSegmentLength (a parameter that is negotiated
+	 * per connection and per direction).\n
+	 * The text in the Text Response Data is governed by the same rules as
+	 * the text in the Text Request Data.\n
+	 * Although the initiator is the requesting party and controls the
+	 * request-response initiation and termination, the target can offer
+	 * key=value pairs of its own as part of a sequence and not only in
+	 * response to the initiator.
+	 */
+	iscsi_scsi_ds_cmd_data ds_cmd_data;
 } iscsi_text_response_packet;
 
 
@@ -6585,1735 +4219,20 @@ typedef struct __attribute__((packed)) iscsi_text_response_packet {
  * MUST also be persistent over power cycles, reboot, card swap, etc.
  */
 typedef struct __attribute__((packed)) iscsi_isid {
-    /// Meaning depends on T bit, either 22-bit OUI or reserved.
-    uint8_t a;
+	/// Meaning depends on T bit, either 22-bit OUI or reserved.
+	uint8_t a;
 
-    /// Meaning depends on T bit, either 22-bit OUI, EN (IANA Enterprise Number) or random.
-    uint16_t b;
+	/// Meaning depends on T bit, either 22-bit OUI, EN (IANA Enterprise Number) or random.
+	uint16_t b;
 
-    /// Meaning depends on T bit, either 24-bit Qualifier, EN (IANA Enterprise Number) or random.
-    uint8_t c;
+	/// Meaning depends on T bit, either 24-bit Qualifier, EN (IANA Enterprise Number) or random.
+	uint8_t c;
 
-    /// Meaning depends on T bit, either 24-bit Qualifier or Qualifier.
-    uint16_t d;
+	/// Meaning depends on T bit, either 24-bit Qualifier or Qualifier.
+	uint16_t d;
 } iscsi_isid;
 
 
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Session type.
- *
- * @verbatim
- * Use: LO, Declarative, Any-Stage
- * Senders: Initiator
- * Scope: SW
- * SessionType=<Discovery|Normal>
- * Default is Normal.
- * @endverbatim
- * The initiator indicates the type of session it wants to create. The
- * target can either accept it or reject it.\n
- * A Discovery session indicates to the target that the only purpose of
- * this session is discovery. The only requests a target accepts in
- * this type of session are a Text Request with a SendTargets key and a
- * Logout Request with reason "close the session".\n
- * The Discovery session implies MaxConnections = 1 and overrides both
- * the default and an explicit setting. ErrorRecoveryLevel MUST be 0
- * (zero) for Discovery sessions.\n
- * Depending on the type of session, a target may decide on resources to
- * allocate, the security to enforce, etc., for the session. If the
- * SessionType key is thus going to be offered as "Discovery", it SHOULD
- * be offered in the initial Login Request by the initiator.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_SESSION_TYPE            ((const uint8_t *) "SessionType\0\0\0\0")
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Initiator name.
- *
- * @verbatim
- * Use: IO, Declarative, Any-Stage
- * Senders: Initiator
- * Scope: SW
- * InitiatorName=<iSCSI-name-value>
- * Examples:
- *    InitiatorName=iqn.1992-04.de.uni-freiburg.bwlehrpool:qcow2.5003
- *    InitiatorName=iqn.2001-02.de.uni-freiburg.matrix:basty.eduroam
- *    InitiatorName=naa.52004567BA64678D
- * @endverbatim
- * The initiator of the TCP connection MUST provide this key to the
- * remote endpoint at the first login of the Login Phase for every
- * connection. The InitiatorName key enables the initiator to identify
- * itself to the remote endpoint.\n
- * The InitiatorName MUST NOT be redeclared within the Login Phase.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_INITIATOR_NAME          ((const uint8_t *) "InitiatorName\0\0")
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Target name.
- *
- * @verbatim
- * Use: IO by initiator, FFPO by target - only as response to a
- * SendTargets, Declarative, Any-Stage
- * Senders: Initiator and target
- * Scope: SW
- * TargetName=<iSCSI-name-value>
- * Examples:
- *    TargetName=iqn.1993-11.de.uni-freiburg:diskarrays.sn.5003
- *    TargetName=eui.020000023B040506
- *    TargetName=naa.62004567BA64678D0123456789ABCDEF
- * @endverbatim
- * The initiator of the TCP connection MUST provide this key to the
- * remote endpoint in the first Login Request if the initiator is not
- * establishing a Discovery session. The iSCSI Target Name specifies
- * the worldwide unique name of the target.\n
- * The TargetName key may also be returned by the SendTargets Text
- * Request (which is its only use when issued by a target).\n
- * The TargetName MUST NOT be redeclared within the Login Phase.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_NAME             ((const uint8_t *) "TargetName\0\0\0\0\0")
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Target address.
- *
- * @verbatim
- * Use: ALL, Declarative, Any-Stage
- * Senders: Target
- * Scope: SW
- * TargetAddress=domainname[:port][,portal-group-tag]
- * @endverbatim
- * The domainname can be specified as either a DNS host name, a dotted-
- * decimal IPv4 address, or a bracketed IPv6 address as specified in
- * RFC3986.\n
- * If the TCP port is not specified, it is assumed to be the IANA-
- * assigned default port for iSCSI.\n
- * If the TargetAddress is returned as the result of a redirect status
- * in a Login Response, the comma and portal-group-tag MUST be omitted.
- * If the TargetAddress is returned within a SendTargets response, the
- * portal-group-tag MUST be included.\n
- * @verbatim
- * Examples:
- *    TargetAddress=10.0.0.1:5003,1
- *    TargetAddress=[1080:0:0:0:8:800:200C:417A],65
- *    TargetAddress=[1080::8:800:200C:417A]:5003,1
- *    TargetAddress=gitlab.uni-freiburg.de,443
- * @endverbatim
- * The formats for the port and portal-group-tag are the same as the one
- * specified in TargetPortalGroupTag.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_ADDRESS          ((const uint8_t *) "TargetAddress\0\0")
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Initiator alias.
- *
- * @verbatim
- * Use: ALL, Declarative, Any-Stage
- * Senders: Initiator
- * Scope: SW
- * InitiatorAlias=<iSCSI-local-name-value>
- * Examples:
- *    InitiatorAlias=Web Server 5
- *    InitiatorAlias=matrix.uni-freiburg.de
- *    InitiatorAlias=Matrix Server
- * @endverbatim
- * If an initiator has been configured with a human-readable name or
- * description, it SHOULD be communicated to the target during a Login
- * Request PDU. If not, the host name can be used instead. This string
- * is not used as an identifier, nor is it meant to be used for
- * authentication or authorization decisions. It can be displayed by
- * the target's user interface in a list of initiators to which it is
- * connected.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_INITIATOR_ALIAS         ((const uint8_t *) "InitiatorAlias\0")
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Target alias.
- *
- * @verbatim
- * Use: ALL, Declarative, Any-Stage
- * Senders: Target
- * Scope: SW
- * TargetAlias=<iSCSI-local-name-value>
- * Examples:
- *    TargetAlias=Bob-s Disk
- *    TargetAlias=Database Server 1 Log Disk
- *    TargetAlias=Web Server 3 Disk 20
- * @endverbatim
- * If a target has been configured with a human-readable name or
- * description, this name SHOULD be communicated to the initiator during
- * a Login Response PDU if SessionType=Normal. This string is not used
- * as an identifier, nor is it meant to be used for authentication or
- * authorization decisions. It can be displayed by the initiator's user
- * interface in a list of targets to which it is connected.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_ALIAS            ((const uint8_t *) "TargetAlias\0\0\0\0")
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Target portal group tag.
- *
- * @verbatim
- * Use: IO by target, Declarative, Any-Stage
- * Senders: Target
- * Scope: SW
- * TargetPortalGroupTag=<16-bit-binary-value>
- * Example:
- *    TargetPortalGroupTag=1
- * @endverbatim
- * The TargetPortalGroupTag key is a 16-bit binary-value that uniquely
- * identifies a portal group within an iSCSI target node. This key
- * carries the value of the tag of the portal group that is servicing
- * the Login Request. The iSCSI target returns this key to the
- * initiator in the Login Response PDU to the first Login Request PDU
- * that has the C bit set to 0 when TargetName is given by the
- * initiator.\n
- * SAM2 notes in its informative text that the TPGT value should be
- * non-zero; note that this is incorrect. A zero value is allowed as a
- * legal value for the TPGT. This discrepancy currently stands
- * corrected in SAM4.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_TARGET_PORTAL_GROUP_TAG ((const uint8_t *) "TargetPortalGroupTag\0\0\0")
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Authentication method.
- *
- * @verbatim
- * Use: During Login - Security Negotiation
- * Senders: Initiator and target
- * Scope: connection
- * AuthMethod = <list-of-values>
- * @endverbatim
- * The main item of security negotiation is the authentication method
- * (AuthMethod).\n
- * The authentication methods that can be used (appear in the list-of-
- * values) are either vendor-unique methods or those listed in the
- * following table:
- * Name | Description
- * :--- | :---------------------------------------------------------------
- * KRB5 | Kerberos V5 - defined in RFC4120
- * SRP  | Secure Remote Password - defined in RFC2945
- * CHAP | Challenge Handshake Authentication Protocol - defined in RFC1994
- * None | No authentication
- *
- * The AuthMethod selection is followed by an "authentication exchange"
- * specific to the authentication method selected.\n
- * The authentication method proposal may be made by either the
- * initiator or the target. However, the initiator MUST make the first
- * step specific to the selected authentication method as soon as it is
- * selected. It follows that if the target makes the authentication
- * method proposal, the initiator sends the first key(s) of the exchange
- * together with its authentication method selection.\n
- * The authentication exchange authenticates the initiator to the target
- * and, optionally, the target to the initiator. Authentication is
- * OPTIONAL to use but MUST be supported by the target and initiator.
- * The initiator and target MUST implement CHAP. All other
- * authentication methods are OPTIONAL.\n
- * Private or public extension algorithms MAY also be negotiated for
- * authentication methods. Whenever a private or public extension
- * algorithm is part of the default offer (the offer made in the absence
- * of explicit administrative action), the implementer MUST ensure that
- * CHAP is listed as an alternative in the default offer and "None" is
- * not part of the default offer.\n
- * Extension authentication methods MUST be named using one of the
- * following two formats:
- *    -# Z-reversed.vendor.dns_name.do_something=
- *    -# New public key with no name prefix constraints
- *
- * Authentication methods named using the Z- format are used as private
- * extensions. New public keys must be registered with IANA using the
- * IETF Review process RFC5226. New public extensions for
- * authentication methods MUST NOT use the Z# name prefix.\n
- * For all of the public or private extension authentication methods,
- * the method-specific keys MUST conform to the format specified for
- * standard-label.\n
- * To identify the vendor for private extension authentication methods,
- * we suggest using the reversed DNS-name as a prefix to the proper
- * digest names.\n
- * The part of digest-name following Z- MUST conform to the format for
- * standard-label.\n
- * Support for public or private extension authentication methods is
- * OPTIONAL.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD             ((const uint8_t *) "AuthMethod\0\0\0\0\0")
-
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Kerberos V5 (KRB5): KRB_AP_REQ.
- *
- * For KRB5 (Kerberos V5) (see RFC4120 and RFC1964), the initiator MUST use:
- * @verbatim
- *    KRB_AP_REQ=<KRB_AP_REQ>
- * @endverbatim
- * where KRB_AP_REQ is the client message as defined in RFC4120.
- * The default principal name assumed by an iSCSI initiator or target
- * (prior to any administrative configuration action) MUST be the iSCSI
- * Initiator Name or iSCSI Target Name, respectively, prefixed by the
- * string "iscsi/".\n
- * If the initiator authentication fails, the target MUST respond with a
- * Login reject with "Authentication Failure" status. Otherwise, if the
- * initiator has selected the mutual authentication option (by setting
- * MUTUAL-REQUIRED in the ap-options field of the KRB_AP_REQ), the
- * target MUST reply with:
- * @verbatim
- *    KRB_AP_REP=<KRB_AP_REP>
- * @endverbatim
- * where KRB_AP_REP is the server's response message as defined in
- * RFC4120.\n
- * If mutual authentication was selected and target authentication
- * fails, the initiator MUST close the connection.\n
- * KRB_AP_REQ and KRB_AP_REP are binary-values, and their binary length
- * (not the length of the character string that represents them in
- * encoded form) MUST NOT exceed 65536 bytes. Hex or Base64 encoding
- * may be used for KRB_AP_REQ and KRB_AP_REP.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD_KRB_AP_REQ ((const uint8_t *) "KRB_AP_REQ\0\0\0\0\0")
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Kerberos V5 (KRB5): KRB_AP_REP.
- *
- * For KRB5 (Kerberos V5) (see RFC4120 and RFC1964), the initiator MUST use:
- * @verbatim
- *    KRB_AP_REQ=<KRB_AP_REQ>
- * @endverbatim
- * where KRB_AP_REQ is the client message as defined in RFC4120.
- * The default principal name assumed by an iSCSI initiator or target
- * (prior to any administrative configuration action) MUST be the iSCSI
- * Initiator Name or iSCSI Target Name, respectively, prefixed by the
- * string "iscsi/".\n
- * If the initiator authentication fails, the target MUST respond with a
- * Login reject with "Authentication Failure" status. Otherwise, if the
- * initiator has selected the mutual authentication option (by setting
- * MUTUAL-REQUIRED in the ap-options field of the KRB_AP_REQ), the
- * target MUST reply with:
- * @verbatim
- *    KRB_AP_REP=<KRB_AP_REP>
- * @endverbatim
- * where KRB_AP_REP is the server's response message as defined in
- * RFC4120.\n
- * If mutual authentication was selected and target authentication
- * fails, the initiator MUST close the connection.\n
- * KRB_AP_REQ and KRB_AP_REP are binary-values, and their binary length
- * (not the length of the character string that represents them in
- * encoded form) MUST NOT exceed 65536 bytes. Hex or Base64 encoding
- * may be used for KRB_AP_REQ and KRB_AP_REP.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD_KRB_AP_REP ((const uint8_t *) "KRB_AP_REP\0\0\0\0\0")
-
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Secure Remote Password (SRP): SRP_U.
- *
- * For SRP RFC2945, the initiator MUST use:
- * @verbatim
- *    SRP_U=<U> TargetAuth=Yes or TargetAuth=No
- * @endverbatim
- * The target MUST answer with a Login reject with the "Authorization
- * Failure" status or reply with:
- * @verbatim
- *    SRP_GROUP=<G1,G2...> SRP_s=<s>
- * @endverbatim
- * where G1,G2... are proposed groups, in order of preference.
- * The initiator MUST either close the connection or continue with:
- * @verbatim
- *    SRP_A=<A>
- *    SRP_GROUP=<G>
- * @endverbatim
- * where G is one of G1,G2... that were proposed by the target.
- * The target MUST answer with a Login reject with the "Authentication
- * Failure" status or reply with:
- * @verbatim
- *     SRP_B=<B>
- * @endverbatim
- * The initiator MUST close the connection or continue with:
- * @verbatim
- *     SRP_M=<M>
- * @endverbatim
- * If the initiator authentication fails, the target MUST answer with a
- * Login reject with "Authentication Failure" status. Otherwise, if the
- * initiator sent TargetAuth=Yes in the first message (requiring target
- * authentication), the target MUST reply with:
- * @verbatim
- *     SRP_HM=<H(A | M | K)>
- * @endverbatim
- * If the target authentication fails, the initiator MUST close the
- * connection:\n
- * where U, s, A, B, M, and H(A | M | K) are defined in RFC2945 (using
- * the SHA1 hash function, such as SRP-SHA1) and
- * G,Gn ("Gn" stands for G1,G2...) are identifiers of SRP groups
- * specified in RFC3723.\n
- * G, Gn, and U are text strings; s,A,B,M, and H(A | M | K) are
- * binary-values. The length of s,A,B,M and H(A | M | K) in binary form
- * (not the length of the character string that represents them in
- * encoded form) MUST NOT exceed 1024 bytes. Hex or Base64 encoding may
- * be used for s,A,B,M and H(A | M | K).\n
- * For the SRP_GROUP, all the groups specified in RFC3723 up to
- * 1536 bits (i.e. SRP-768, SRP-1024, SRP-1280, SRP-1536) must be
- * supported by initiators and targets. To guarantee interoperability,
- * targets MUST always offer "SRP-1536" as one of the proposed groups.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD_SRP_SRP_U     ((const uint8_t *) "SRP_U\0\0")
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Secure Remote Password (SRP): SRP_GROUP.
- *
- * For SRP RFC2945, the initiator MUST use:
- * @verbatim
- *    SRP_U=<U> TargetAuth=Yes or TargetAuth=No
- * @endverbatim
- * The target MUST answer with a Login reject with the "Authorization
- * Failure" status or reply with:
- * @verbatim
- *    SRP_GROUP=<G1,G2...> SRP_s=<s>
- * @endverbatim
- * where G1,G2... are proposed groups, in order of preference.
- * The initiator MUST either close the connection or continue with:
- * @verbatim
- *    SRP_A=<A>
- *    SRP_GROUP=<G>
- * @endverbatim
- * where G is one of G1,G2... that were proposed by the target.
- * The target MUST answer with a Login reject with the "Authentication
- * Failure" status or reply with:
- * @verbatim
- *     SRP_B=<B>
- * @endverbatim
- * The initiator MUST close the connection or continue with:
- * @verbatim
- *     SRP_M=<M>
- * @endverbatim
- * If the initiator authentication fails, the target MUST answer with a
- * Login reject with "Authentication Failure" status. Otherwise, if the
- * initiator sent TargetAuth=Yes in the first message (requiring target
- * authentication), the target MUST reply with:
- * @verbatim
- *     SRP_HM=<H(A | M | K)>
- * @endverbatim
- * If the target authentication fails, the initiator MUST close the
- * connection:\n
- * where U, s, A, B, M, and H(A | M | K) are defined in RFC2945 (using
- * the SHA1 hash function, such as SRP-SHA1) and
- * G,Gn ("Gn" stands for G1,G2...) are identifiers of SRP groups
- * specified in RFC3723.\n
- * G, Gn, and U are text strings; s,A,B,M, and H(A | M | K) are
- * binary-values. The length of s,A,B,M and H(A | M | K) in binary form
- * (not the length of the character string that represents them in
- * encoded form) MUST NOT exceed 1024 bytes. Hex or Base64 encoding may
- * be used for s,A,B,M and H(A | M | K).\n
- * For the SRP_GROUP, all the groups specified in RFC3723 up to
- * 1536 bits (i.e. SRP-768, SRP-1024, SRP-1280, SRP-1536) must be
- * supported by initiators and targets. To guarantee interoperability,
- * targets MUST always offer "SRP-1536" as one of the proposed groups.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD_SRP_SRP_GROUP ((const uint8_t *) "SRP_GROUP\0\0\0\0\0\0")
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Secure Remote Password (SRP): SRP_A.
- *
- * For SRP RFC2945, the initiator MUST use:
- * @verbatim
- *    SRP_U=<U> TargetAuth=Yes or TargetAuth=No
- * @endverbatim
- * The target MUST answer with a Login reject with the "Authorization
- * Failure" status or reply with:
- * @verbatim
- *    SRP_GROUP=<G1,G2...> SRP_s=<s>
- * @endverbatim
- * where G1,G2... are proposed groups, in order of preference.
- * The initiator MUST either close the connection or continue with:
- * @verbatim
- *    SRP_A=<A>
- *    SRP_GROUP=<G>
- * @endverbatim
- * where G is one of G1,G2... that were proposed by the target.
- * The target MUST answer with a Login reject with the "Authentication
- * Failure" status or reply with:
- * @verbatim
- *     SRP_B=<B>
- * @endverbatim
- * The initiator MUST close the connection or continue with:
- * @verbatim
- *     SRP_M=<M>
- * @endverbatim
- * If the initiator authentication fails, the target MUST answer with a
- * Login reject with "Authentication Failure" status. Otherwise, if the
- * initiator sent TargetAuth=Yes in the first message (requiring target
- * authentication), the target MUST reply with:
- * @verbatim
- *     SRP_HM=<H(A | M | K)>
- * @endverbatim
- * If the target authentication fails, the initiator MUST close the
- * connection:\n
- * where U, s, A, B, M, and H(A | M | K) are defined in RFC2945 (using
- * the SHA1 hash function, such as SRP-SHA1) and
- * G,Gn ("Gn" stands for G1,G2...) are identifiers of SRP groups
- * specified in RFC3723.\n
- * G, Gn, and U are text strings; s,A,B,M, and H(A | M | K) are
- * binary-values. The length of s,A,B,M and H(A | M | K) in binary form
- * (not the length of the character string that represents them in
- * encoded form) MUST NOT exceed 1024 bytes. Hex or Base64 encoding may
- * be used for s,A,B,M and H(A | M | K).\n
- * For the SRP_GROUP, all the groups specified in RFC3723 up to
- * 1536 bits (i.e. SRP-768, SRP-1024, SRP-1280, SRP-1536) must be
- * supported by initiators and targets. To guarantee interoperability,
- * targets MUST always offer "SRP-1536" as one of the proposed groups.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD_SRP_SRP_A     ((const uint8_t *) "SRP_A\0\0")
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Secure Remote Password (SRP): SRP_B.
- *
- * For SRP RFC2945, the initiator MUST use:
- * @verbatim
- *    SRP_U=<U> TargetAuth=Yes or TargetAuth=No
- * @endverbatim
- * The target MUST answer with a Login reject with the "Authorization
- * Failure" status or reply with:
- * @verbatim
- *    SRP_GROUP=<G1,G2...> SRP_s=<s>
- * @endverbatim
- * where G1,G2... are proposed groups, in order of preference.
- * The initiator MUST either close the connection or continue with:
- * @verbatim
- *    SRP_A=<A>
- *    SRP_GROUP=<G>
- * @endverbatim
- * where G is one of G1,G2... that were proposed by the target.
- * The target MUST answer with a Login reject with the "Authentication
- * Failure" status or reply with:
- * @verbatim
- *     SRP_B=<B>
- * @endverbatim
- * The initiator MUST close the connection or continue with:
- * @verbatim
- *     SRP_M=<M>
- * @endverbatim
- * If the initiator authentication fails, the target MUST answer with a
- * Login reject with "Authentication Failure" status. Otherwise, if the
- * initiator sent TargetAuth=Yes in the first message (requiring target
- * authentication), the target MUST reply with:
- * @verbatim
- *     SRP_HM=<H(A | M | K)>
- * @endverbatim
- * If the target authentication fails, the initiator MUST close the
- * connection:\n
- * where U, s, A, B, M, and H(A | M | K) are defined in RFC2945 (using
- * the SHA1 hash function, such as SRP-SHA1) and
- * G,Gn ("Gn" stands for G1,G2...) are identifiers of SRP groups
- * specified in RFC3723.\n
- * G, Gn, and U are text strings; s,A,B,M, and H(A | M | K) are
- * binary-values. The length of s,A,B,M and H(A | M | K) in binary form
- * (not the length of the character string that represents them in
- * encoded form) MUST NOT exceed 1024 bytes. Hex or Base64 encoding may
- * be used for s,A,B,M and H(A | M | K).\n
- * For the SRP_GROUP, all the groups specified in RFC3723 up to
- * 1536 bits (i.e. SRP-768, SRP-1024, SRP-1280, SRP-1536) must be
- * supported by initiators and targets. To guarantee interoperability,
- * targets MUST always offer "SRP-1536" as one of the proposed groups.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD_SRP_SRP_B     ((const uint8_t *) "SRP_B\0\0")
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Secure Remote Password (SRP): SRP_M.
- *
- * For SRP RFC2945, the initiator MUST use:
- * @verbatim
- *    SRP_U=<U> TargetAuth=Yes or TargetAuth=No
- * @endverbatim
- * The target MUST answer with a Login reject with the "Authorization
- * Failure" status or reply with:
- * @verbatim
- *    SRP_GROUP=<G1,G2...> SRP_s=<s>
- * @endverbatim
- * where G1,G2... are proposed groups, in order of preference.
- * The initiator MUST either close the connection or continue with:
- * @verbatim
- *    SRP_A=<A>
- *    SRP_GROUP=<G>
- * @endverbatim
- * where G is one of G1,G2... that were proposed by the target.
- * The target MUST answer with a Login reject with the "Authentication
- * Failure" status or reply with:
- * @verbatim
- *     SRP_B=<B>
- * @endverbatim
- * The initiator MUST close the connection or continue with:
- * @verbatim
- *     SRP_M=<M>
- * @endverbatim
- * If the initiator authentication fails, the target MUST answer with a
- * Login reject with "Authentication Failure" status. Otherwise, if the
- * initiator sent TargetAuth=Yes in the first message (requiring target
- * authentication), the target MUST reply with:
- * @verbatim
- *     SRP_HM=<H(A | M | K)>
- * @endverbatim
- * If the target authentication fails, the initiator MUST close the
- * connection:\n
- * where U, s, A, B, M, and H(A | M | K) are defined in RFC2945 (using
- * the SHA1 hash function, such as SRP-SHA1) and
- * G,Gn ("Gn" stands for G1,G2...) are identifiers of SRP groups
- * specified in RFC3723.\n
- * G, Gn, and U are text strings; s,A,B,M, and H(A | M | K) are
- * binary-values. The length of s,A,B,M and H(A | M | K) in binary form
- * (not the length of the character string that represents them in
- * encoded form) MUST NOT exceed 1024 bytes. Hex or Base64 encoding may
- * be used for s,A,B,M and H(A | M | K).\n
- * For the SRP_GROUP, all the groups specified in RFC3723 up to
- * 1536 bits (i.e. SRP-768, SRP-1024, SRP-1280, SRP-1536) must be
- * supported by initiators and targets. To guarantee interoperability,
- * targets MUST always offer "SRP-1536" as one of the proposed groups.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD_SRP_SRP_M     ((const uint8_t *) "SRP_M\0\0")
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Secure Remote Password (SRP): SRP_HM.
- *
- * For SRP RFC2945, the initiator MUST use:
- * @verbatim
- *    SRP_U=<U> TargetAuth=Yes or TargetAuth=No
- * @endverbatim
- * The target MUST answer with a Login reject with the "Authorization
- * Failure" status or reply with:
- * @verbatim
- *    SRP_GROUP=<G1,G2...> SRP_s=<s>
- * @endverbatim
- * where G1,G2... are proposed groups, in order of preference.
- * The initiator MUST either close the connection or continue with:
- * @verbatim
- *    SRP_A=<A>
- *    SRP_GROUP=<G>
- * @endverbatim
- * where G is one of G1,G2... that were proposed by the target.
- * The target MUST answer with a Login reject with the "Authentication
- * Failure" status or reply with:
- * @verbatim
- *     SRP_B=<B>
- * @endverbatim
- * The initiator MUST close the connection or continue with:
- * @verbatim
- *     SRP_M=<M>
- * @endverbatim
- * If the initiator authentication fails, the target MUST answer with a
- * Login reject with "Authentication Failure" status. Otherwise, if the
- * initiator sent TargetAuth=Yes in the first message (requiring target
- * authentication), the target MUST reply with:
- * @verbatim
- *     SRP_HM=<H(A | M | K)>
- * @endverbatim
- * If the target authentication fails, the initiator MUST close the
- * connection:\n
- * where U, s, A, B, M, and H(A | M | K) are defined in RFC2945 (using
- * the SHA1 hash function, such as SRP-SHA1) and
- * G,Gn ("Gn" stands for G1,G2...) are identifiers of SRP groups
- * specified in RFC3723.\n
- * G, Gn, and U are text strings; s,A,B,M, and H(A | M | K) are
- * binary-values. The length of s,A,B,M and H(A | M | K) in binary form
- * (not the length of the character string that represents them in
- * encoded form) MUST NOT exceed 1024 bytes. Hex or Base64 encoding may
- * be used for s,A,B,M and H(A | M | K).\n
- * For the SRP_GROUP, all the groups specified in RFC3723 up to
- * 1536 bits (i.e. SRP-768, SRP-1024, SRP-1280, SRP-1536) must be
- * supported by initiators and targets. To guarantee interoperability,
- * targets MUST always offer "SRP-1536" as one of the proposed groups.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD_SRP_SRP_HM    ((const uint8_t *) "SRP_HM\0")
-
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Challenge Handshake Authentication Protocol (CHAP): CHAP_A.
- *
- * For CHAP RFC1994, the initiator MUST use:
- * @verbatim
- *    CHAP_A=<A1,A2...>
- * @endverbatim
- * where A1,A2... are proposed algorithms, in order of preference.
- * The target MUST answer with a Login reject with the "Authentication
- * Failure" status or reply with:
- * @verbatim
- *    CHAP_A=<A>
- *    CHAP_I=<I>
- *    CHAP_C=<C>
- * @endverbatim
- * where A is one of A1,A2... that were proposed by the initiator.
- * The initiator MUST continue with:
- * @verbatim
- *    CHAP_N=<N>
- *    CHAP_R=<R>
- * @endverbatim
- * or, if it requires target authentication, with:
- * @verbatim
- *    CHAP_N=<N>
- *    CHAP_R=<R>
- *    CHAP_I=<I>
- *    CHAP_C=<C>
- * @endverbatim
- * If the initiator authentication fails, the target MUST answer with a
- * Login reject with "Authentication Failure" status. Otherwise, if the
- * initiator required target authentication, the target MUST either
- * answer with a Login reject with "Authentication Failure" or reply
- * with:
- * @verbatim
- *    CHAP_N=<N>
- *    CHAP_R=<R>
- * @endverbatim
- * If the target authentication fails, the initiator MUST close the
- * connection:\n
- * where N, (A,A1,A2), I, C, and R are (correspondingly) the Name,
- * Algorithm, Identifier, Challenge, and Response as defined in
- * RFC1994.\n
- * N is a text string; A,A1,A2, and I are numbers; C and R are
- * binary-values. Their binary length (not the length of the character
- * string that represents them in encoded form) MUST NOT exceed
- * 1024 bytes. Hex or Base64 encoding may be used for C and R.\n
- * For the Algorithm, as stated in [RFC1994], one value is required to
- * be implemented:
- * @verbatim
- *    5     (CHAP with MD5)
- * @endverbatim
- * To guarantee interoperability, initiators MUST always offer it as one
- * of the proposed algorithms.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD_CHAP_CHAP_A ((const uint8_t *) "CHAP_A\0")
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Challenge Handshake Authentication Protocol (CHAP): CHAP_I.
- *
- * For CHAP RFC1994, the initiator MUST use:
- * @verbatim
- *    CHAP_A=<A1,A2...>
- * @endverbatim
- * where A1,A2... are proposed algorithms, in order of preference.
- * The target MUST answer with a Login reject with the "Authentication
- * Failure" status or reply with:
- * @verbatim
- *    CHAP_A=<A>
- *    CHAP_I=<I>
- *    CHAP_C=<C>
- * @endverbatim
- * where A is one of A1,A2... that were proposed by the initiator.
- * The initiator MUST continue with:
- * @verbatim
- *    CHAP_N=<N>
- *    CHAP_R=<R>
- * @endverbatim
- * or, if it requires target authentication, with:
- * @verbatim
- *    CHAP_N=<N>
- *    CHAP_R=<R>
- *    CHAP_I=<I>
- *    CHAP_C=<C>
- * @endverbatim
- * If the initiator authentication fails, the target MUST answer with a
- * Login reject with "Authentication Failure" status. Otherwise, if the
- * initiator required target authentication, the target MUST either
- * answer with a Login reject with "Authentication Failure" or reply
- * with:
- * @verbatim
- *    CHAP_N=<N>
- *    CHAP_R=<R>
- * @endverbatim
- * If the target authentication fails, the initiator MUST close the
- * connection:\n
- * where N, (A,A1,A2), I, C, and R are (correspondingly) the Name,
- * Algorithm, Identifier, Challenge, and Response as defined in
- * RFC1994.\n
- * N is a text string; A,A1,A2, and I are numbers; C and R are
- * binary-values. Their binary length (not the length of the character
- * string that represents them in encoded form) MUST NOT exceed
- * 1024 bytes. Hex or Base64 encoding may be used for C and R.\n
- * For the Algorithm, as stated in [RFC1994], one value is required to
- * be implemented:
- * @verbatim
- *    5     (CHAP with MD5)
- * @endverbatim
- * To guarantee interoperability, initiators MUST always offer it as one
- * of the proposed algorithms.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD_CHAP_CHAP_I ((const uint8_t *) "CHAP_I\0")
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Challenge Handshake Authentication Protocol (CHAP): CHAP_C.
- *
- * For CHAP RFC1994, the initiator MUST use:
- * @verbatim
- *    CHAP_A=<A1,A2...>
- * @endverbatim
- * where A1,A2... are proposed algorithms, in order of preference.
- * The target MUST answer with a Login reject with the "Authentication
- * Failure" status or reply with:
- * @verbatim
- *    CHAP_A=<A>
- *    CHAP_I=<I>
- *    CHAP_C=<C>
- * @endverbatim
- * where A is one of A1,A2... that were proposed by the initiator.
- * The initiator MUST continue with:
- * @verbatim
- *    CHAP_N=<N>
- *    CHAP_R=<R>
- * @endverbatim
- * or, if it requires target authentication, with:
- * @verbatim
- *    CHAP_N=<N>
- *    CHAP_R=<R>
- *    CHAP_I=<I>
- *    CHAP_C=<C>
- * @endverbatim
- * If the initiator authentication fails, the target MUST answer with a
- * Login reject with "Authentication Failure" status. Otherwise, if the
- * initiator required target authentication, the target MUST either
- * answer with a Login reject with "Authentication Failure" or reply
- * with:
- * @verbatim
- *    CHAP_N=<N>
- *    CHAP_R=<R>
- * @endverbatim
- * If the target authentication fails, the initiator MUST close the
- * connection:\n
- * where N, (A,A1,A2), I, C, and R are (correspondingly) the Name,
- * Algorithm, Identifier, Challenge, and Response as defined in
- * RFC1994.\n
- * N is a text string; A,A1,A2, and I are numbers; C and R are
- * binary-values. Their binary length (not the length of the character
- * string that represents them in encoded form) MUST NOT exceed
- * 1024 bytes. Hex or Base64 encoding may be used for C and R.\n
- * For the Algorithm, as stated in [RFC1994], one value is required to
- * be implemented:
- * @verbatim
- *    5     (CHAP with MD5)
- * @endverbatim
- * To guarantee interoperability, initiators MUST always offer it as one
- * of the proposed algorithms.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD_CHAP_CHAP_C ((const uint8_t *) "CHAP_C\0")
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Challenge Handshake Authentication Protocol (CHAP): CHAP_N.
- *
- * For CHAP RFC1994, the initiator MUST use:
- * @verbatim
- *    CHAP_A=<A1,A2...>
- * @endverbatim
- * where A1,A2... are proposed algorithms, in order of preference.
- * The target MUST answer with a Login reject with the "Authentication
- * Failure" status or reply with:
- * @verbatim
- *    CHAP_A=<A>
- *    CHAP_I=<I>
- *    CHAP_C=<C>
- * @endverbatim
- * where A is one of A1,A2... that were proposed by the initiator.
- * The initiator MUST continue with:
- * @verbatim
- *    CHAP_N=<N>
- *    CHAP_R=<R>
- * @endverbatim
- * or, if it requires target authentication, with:
- * @verbatim
- *    CHAP_N=<N>
- *    CHAP_R=<R>
- *    CHAP_I=<I>
- *    CHAP_C=<C>
- * @endverbatim
- * If the initiator authentication fails, the target MUST answer with a
- * Login reject with "Authentication Failure" status. Otherwise, if the
- * initiator required target authentication, the target MUST either
- * answer with a Login reject with "Authentication Failure" or reply
- * with:
- * @verbatim
- *    CHAP_N=<N>
- *    CHAP_R=<R>
- * @endverbatim
- * If the target authentication fails, the initiator MUST close the
- * connection:\n
- * where N, (A,A1,A2), I, C, and R are (correspondingly) the Name,
- * Algorithm, Identifier, Challenge, and Response as defined in
- * RFC1994.\n
- * N is a text string; A,A1,A2, and I are numbers; C and R are
- * binary-values. Their binary length (not the length of the character
- * string that represents them in encoded form) MUST NOT exceed
- * 1024 bytes. Hex or Base64 encoding may be used for C and R.\n
- * For the Algorithm, as stated in [RFC1994], one value is required to
- * be implemented:
- * @verbatim
- *    5     (CHAP with MD5)
- * @endverbatim
- * To guarantee interoperability, initiators MUST always offer it as one
- * of the proposed algorithms.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD_CHAP_CHAP_N ((const uint8_t *) "CHAP_N\0")
-
-/**
- * @brief Key used during SecurityNegotiation stage of Login Phase: Challenge Handshake Authentication Protocol (CHAP): CHAP_R.
- *
- * For CHAP RFC1994, the initiator MUST use:
- * @verbatim
- *    CHAP_A=<A1,A2...>
- * @endverbatim
- * where A1,A2... are proposed algorithms, in order of preference.
- * The target MUST answer with a Login reject with the "Authentication
- * Failure" status or reply with:
- * @verbatim
- *    CHAP_A=<A>
- *    CHAP_I=<I>
- *    CHAP_C=<C>
- * @endverbatim
- * where A is one of A1,A2... that were proposed by the initiator.
- * The initiator MUST continue with:
- * @verbatim
- *    CHAP_N=<N>
- *    CHAP_R=<R>
- * @endverbatim
- * or, if it requires target authentication, with:
- * @verbatim
- *    CHAP_N=<N>
- *    CHAP_R=<R>
- *    CHAP_I=<I>
- *    CHAP_C=<C>
- * @endverbatim
- * If the initiator authentication fails, the target MUST answer with a
- * Login reject with "Authentication Failure" status. Otherwise, if the
- * initiator required target authentication, the target MUST either
- * answer with a Login reject with "Authentication Failure" or reply
- * with:
- * @verbatim
- *    CHAP_N=<N>
- *    CHAP_R=<R>
- * @endverbatim
- * If the target authentication fails, the initiator MUST close the
- * connection:\n
- * where N, (A,A1,A2), I, C, and R are (correspondingly) the Name,
- * Algorithm, Identifier, Challenge, and Response as defined in
- * RFC1994.\n
- * N is a text string; A,A1,A2, and I are numbers; C and R are
- * binary-values. Their binary length (not the length of the character
- * string that represents them in encoded form) MUST NOT exceed
- * 1024 bytes. Hex or Base64 encoding may be used for C and R.\n
- * For the Algorithm, as stated in [RFC1994], one value is required to
- * be implemented:
- * @verbatim
- *    5     (CHAP with MD5)
- * @endverbatim
- * To guarantee interoperability, initiators MUST always offer it as one
- * of the proposed algorithms.
- */
-#define ISCSI_LOGIN_AUTH_SECURITY_TEXT_KEY_AUTH_METHOD_CHAP_CHAP_R ((const uint8_t *) "CHAP_R\0")
-
-/* Login/Text Operational Text Keys
-
-   Some session-specific parameters MUST only be carried on the leading
-   connection and cannot be changed after the leading connection login
-   (e.g., MaxConnections - the maximum number of connections). This
-   holds for a single connection session with regard to connection
-   restart. The keys that fall into this category have the "use: LO"
-   (Leading Only).
-
-   Keys that can only be used during login have the "use: IO"
-   (Initialize Only), while those that can be used in both the Login
-   Phase and Full Feature Phase have the "use: ALL".
-
-   Keys that can only be used during the Full Feature Phase use FFPO
-   (Full Feature Phase Only).
-
-   Keys marked as Any-Stage may also appear in the SecurityNegotiation
-   stage, while all other keys described in this section are
-   operational keys.
-
-   Keys that do not require an answer are marked as Declarative.
-
-   Key scope is indicated as session-wide (SW) or connection-only (CO).
-
-   "Result function", wherever mentioned, states the function that can
-   be applied to check the validity of the responder selection.
-   "Minimum" means that the selected value cannot exceed the offered
-   value. "Maximum" means that the selected value cannot be lower than
-   the offered value. "AND" means that the selected value must be a
-   possible result of a Boolean "and" function with an arbitrary Boolean
-   value (e.g., if the offered value is No the selected value must be
-   No). "OR" means that the selected value must be a possible result of
-   a Boolean "or" function with an arbitrary Boolean value (e.g., if the
-   offered value is Yes the selected value must be Yes).
-*/
-
-/**
- * @brief Login/Text Operational Session Text Key: Header digest.
- *
- * @verbatim
- * Use: IO
- * Senders: Initiator and target
- * Scope: CO
- * HeaderDigest = <list-of-values>
- * Default is None for HeaderDigest.
- * @endverbatim
- * Digests enable the checking of end-to-end, non-cryptographic data
- * integrity beyond the integrity checks provided by the link layers and
- * the covering of the whole communication path, including all elements
- * that may change the network-level PDUs, such as routers, switches,
- * and proxies.\n
- * The following table lists cyclic integrity checksums that can be
- * negotiated for the digests and MUST be implemented by every iSCSI
- * initiator and target. These digest options only have error detection
- * significance.
- * Name   | Description | Generator
- * :----- | :---------- | :----------
- * CRC32C | 32-bit CRC  | 0x11EDC6F41
- * None   | no digest   ||
- *
- * The generator polynomial G(x) for this digest is given in hexadecimal
- * notation (e.g. "0x3b" stands for 0011 1011, and the polynomial is
- * x**5 + x**4 + x**3 + x + 1).\n
- * When the initiator and target agree on a digest, this digest MUST be
- * used for every PDU in the Full Feature Phase.\n
- * Padding bytes, when present in a segment covered by a CRC, SHOULD be
- * set to 0 and are included in the CRC.\n
- * The CRC MUST be calculated by a method that produces the same results
- * as the following process:
- * - The PDU bits are considered as the coefficients of a polynomial
- *   M(x) of degree n - 1; bit 7 of the lowest numbered byte is
- *   considered the most significant bit (x**n - 1), followed by bit 6
- *   of the lowest numbered byte through bit 0 of the highest numbered
- *   byte (x**0).
- * - The most significant 32 bits are complemented.
- * - The polynomial is multiplied by x**32, then divided by G(x). The
- *   generator polynomial produces a remainder R(x) of degree <= 31.
- * - The coefficients of R(x) are formed into a 32-bit sequence.
- * - The bit sequence is complemented, and the result is the CRC.
- * - The CRC bits are mapped into the digest word. The x**31
- *   coefficient is mapped to bit 7 of the lowest numbered byte of the
- *   digest, and the mapping continues with successive coefficients and
- *   bits so that the x**24 coefficient is mapped to bit 0 of the lowest
- *   numbered byte. The mapping continues further with the x**23
- *   coefficient mapped to bit 7 of the next byte in the digest until
- *   the x**0 coefficient is mapped to bit 0 of the highest numbered
- *   byte of the digest.
- * - Computing the CRC over any segment (data or header) extended to
- *   include the CRC built using the generator 0x11edc6f41 will always
- *   get the value 0x1c2d19ed as its final remainder (R(x)). This value
- *   is given here in its polynomial form (i.e., not mapped as the
- *   digest word).
- *
- * For a discussion about selection criteria for the CRC, see RFC3385.\n
- * For a detailed analysis of the iSCSI polynomial, see Castagnoli93.\n
- * Private or public extension algorithms MAY also be negotiated for
- * digests. Whenever a private or public digest extension algorithm is
- * part of the default offer (the offer made in the absence of explicit
- * administrative action), the implementer MUST ensure that CRC32C is
- * listed as an alternative in the default offer and "None" is not part
- * of the default offer.\n
- * Extension digest algorithms MUST be named using one of the following
- * two formats:
- *    1. Y-reversed.vendor.dns_name.do_something=
- *    2. New public key with no name prefix constraints
- *
- * Digests named using the Y- format are used for private purposes
- * (unregistered). New public keys must be registered with IANA using
- * the IETF Review process (RFC5226). New public extensions for
- * digests MUST NOT use the Y# name prefix.\n
- * For private extension digests, to identify the vendor we suggest
- * using the reversed DNS-name as a prefix to the proper digest names.\n
- * The part of digest-name following Y- MUST conform to the format for
- * standard-label specified.\n
- * Support for public or private extension digests is OPTIONAL.
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_HEADER_DIGEST ((const uint8_t *) "HeaderDigest\0\0\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: Data digest.
- *
- * @verbatim
- * Use: IO
- * Senders: Initiator and target
- * Scope: CO
- * DataDigest = <list-of-values>
- * Default is None for DataDigest.
- * @endverbatim
- * Digests enable the checking of end-to-end, non-cryptographic data
- * integrity beyond the integrity checks provided by the link layers and
- * the covering of the whole communication path, including all elements
- * that may change the network-level PDUs, such as routers, switches,
- * and proxies.\n
- * The following table lists cyclic integrity checksums that can be
- * negotiated for the digests and MUST be implemented by every iSCSI
- * initiator and target. These digest options only have error detection
- * significance.
- * Name   | Description | Generator
- * :----- | :---------- | :----------
- * CRC32C | 32-bit CRC  | 0x11EDC6F41
- * None   | no digest   ||
- *
- * The generator polynomial G(x) for this digest is given in hexadecimal
- * notation (e.g. "0x3b" stands for 0011 1011, and the polynomial is
- * x**5 + x**4 + x**3 + x + 1).\n
- * When the initiator and target agree on a digest, this digest MUST be
- * used for every PDU in the Full Feature Phase.\n
- * Padding bytes, when present in a segment covered by a CRC, SHOULD be
- * set to 0 and are included in the CRC.\n
- * The CRC MUST be calculated by a method that produces the same results
- * as the following process:
- * - The PDU bits are considered as the coefficients of a polynomial
- *   M(x) of degree n - 1; bit 7 of the lowest numbered byte is
- *   considered the most significant bit (x**n - 1), followed by bit 6
- *   of the lowest numbered byte through bit 0 of the highest numbered
- *   byte (x**0).
- * - The most significant 32 bits are complemented.
- * - The polynomial is multiplied by x**32, then divided by G(x). The
- *   generator polynomial produces a remainder R(x) of degree <= 31.
- * - The coefficients of R(x) are formed into a 32-bit sequence.
- * - The bit sequence is complemented, and the result is the CRC.
- * - The CRC bits are mapped into the digest word. The x**31
- *   coefficient is mapped to bit 7 of the lowest numbered byte of the
- *   digest, and the mapping continues with successive coefficients and
- *   bits so that the x**24 coefficient is mapped to bit 0 of the lowest
- *   numbered byte. The mapping continues further with the x**23
- *   coefficient mapped to bit 7 of the next byte in the digest until
- *   the x**0 coefficient is mapped to bit 0 of the highest numbered
- *   byte of the digest.
- * - Computing the CRC over any segment (data or header) extended to
- *   include the CRC built using the generator 0x11edc6f41 will always
- *   get the value 0x1c2d19ed as its final remainder (R(x)). This value
- *   is given here in its polynomial form (i.e., not mapped as the
- *   digest word).
- *
- * For a discussion about selection criteria for the CRC, see RFC3385.\n
- * For a detailed analysis of the iSCSI polynomial, see Castagnoli93.\n
- * Private or public extension algorithms MAY also be negotiated for
- * digests. Whenever a private or public digest extension algorithm is
- * part of the default offer (the offer made in the absence of explicit
- * administrative action), the implementer MUST ensure that CRC32C is
- * listed as an alternative in the default offer and "None" is not part
- * of the default offer.\n
- * Extension digest algorithms MUST be named using one of the following
- * two formats:
- *    1. Y-reversed.vendor.dns_name.do_something=
- *    2. New public key with no name prefix constraints
- *
- * Digests named using the Y- format are used for private purposes
- * (unregistered). New public keys must be registered with IANA using
- * the IETF Review process (RFC5226). New public extensions for
- * digests MUST NOT use the Y# name prefix.\n
- * For private extension digests, to identify the vendor we suggest
- * using the reversed DNS-name as a prefix to the proper digest names.\n
- * The part of digest-name following Y- MUST conform to the format for
- * standard-label specified.\n
- * Support for public or private extension digests is OPTIONAL.
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DATA_DIGEST   ((const uint8_t *) "DataDigest\0\0\0\0\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: New connections.
- *
- * @verbatim
- * Use: LO
- * Senders: Initiator and target
- * Scope: SW
- * Irrelevant when: SessionType=Discovery
- * MaxConnections=<numerical-value-from-1-to-65535>
- * Default is 1.
- * @endverbatim
- * Result function is Minimum.\n
- * The initiator and target negotiate the maximum number of connections
- * requested/acceptable.
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_CONNECTIONS ((const uint8_t *) "MaxConnections\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: Send targets.
- *
- * @verbatim
- * Use: FFPO
- * Senders: Initiator
- * Scope: SW
- * @endverbatim
- * The text in this appendix is a normative part of this document.\n
- * To reduce the amount of configuration required on an initiator, iSCSI
- * provides the SendTargets Text Request. The initiator uses the
- * SendTargets request to get a list of targets to which it may have
- * access, as well as the list of addresses (IP address and TCP port) on
- * which these targets may be accessed.\n
- * To make use of SendTargets, an initiator must first establish one of
- * two types of sessions. If the initiator establishes the session
- * using the key "SessionType=Discovery", the session is a Discovery
- * session, and a target name does not need to be specified. Otherwise,
- * the session is a Normal operational session. The SendTargets command
- * MUST only be sent during the Full Feature Phase of a Normal or
- * Discovery session.\n
- * A system that contains targets MUST support Discovery sessions on
- * each of its iSCSI IP address-port pairs and MUST support the
- * SendTargets command on the Discovery session. In a Discovery
- * session, a target MUST return all path information (IP address-port
- * pairs and Target Portal Group Tags) for the targets on the target
- * Network Entity that the requesting initiator is authorized to access.\n
- * A target MUST support the SendTargets command on operational
- * sessions; these will only return path information about the target to
- * which the session is connected and do not need to return information
- * about other target names that may be defined in the responding
- * system.\n
- * An initiator MAY make use of the SendTargets command as it sees fit.\n
- * A SendTargets command consists of a single Text Request PDU. This
- * PDU contains exactly one text key and value. The text key MUST be
- * SendTargets. The expected response depends upon the value, as well
- * as whether the session is a Discovery session or an operational
- * session.\n
- * The value must be one of:
- * @verbatim
- *    All
- *       The initiator is requesting that information on all relevant
- *       targets known to the implementation be returned. This value
- *       MUST be supported on a Discovery session and MUST NOT be
- *       supported on an operational session.
- *    <iSCSI-target-name>
- *       If an iSCSI Target Name is specified, the session should
- *       respond with addresses for only the named target, if possible.
- *       This value MUST be supported on Discovery sessions. A
- *       Discovery session MUST be capable of returning addresses for
- *       those targets that would have been returned had value=All been
- *       designated.
- *    <nothing>
- *       The session should only respond with addresses for the target
- *       to which the session is logged in. This MUST be supported on
- *       operational sessions and MUST NOT return targets other than the
- *       one to which the session is logged in.
- * @endverbatim
- * The response to this command is a Text Response that contains a list
- * of zero or more targets and, optionally, their addresses. Each
- * target is returned as a target record. A target record begins with
- * the TargetName text key, followed by a list of TargetAddress text
- * keys, and bounded by the end of the Text Response or the next
- * TargetName key, which begins a new record. No text keys other than
- * TargetName and TargetAddress are permitted within a SendTargets
- * response.\n
- * A Discovery session MAY respond to a SendTargets request with its
- * complete list of targets, or with a list of targets that is based on
- * the name of the initiator logged in to the session.\n
- * A SendTargets response MUST NOT contain target names if there are no
- * targets for the requesting initiator to access.\n
- * Each target record returned includes zero or more TargetAddress
- * fields.\n
- * Each target record starts with one text key of the form:
- * @verbatim
- *    TargetName=<target-name-goes-here>
- * @endverbatim
- * followed by zero or more address keys of the form:
- * @verbatim
- * TargetAddress=<hostname-or-ipaddress>[:<tcp-port>],
- *    <portal-group-tag>
- * @endverbatim
- * The hostname-or-ipaddress contains a domain name, IPv4 address, or
- * IPv6 address (RFC4291), as specified for the TargetAddress key.\n
- * A hostname-or-ipaddress duplicated in TargetAddress responses for a
- * given node (the port is absent or equal) would probably indicate that
- * multiple address families are in use at once (IPv6 and IPv4).\n
- * Each TargetAddress belongs to a portal group, identified by its
- * numeric Target Portal Group Tag. The iSCSI Target Name, together with
- * this tag, constitutes the SCSI port identifier; the tag only needs to
- * be unique within a given target's name list of addresses.\n
- * Multiple-connection sessions can span iSCSI addresses that belong to
- * the same portal group.\n
- * Multiple-connection sessions cannot span iSCSI addresses that belong
- * to different portal groups.\n
- * If a SendTargets response reports an iSCSI address for a target, it
- * SHOULD also report all other addresses in its portal group in the
- * same response.\n
- * A SendTargets Text Response can be longer than a single Text Response
- * PDU and makes use of the long Text Responses as specified.\n
- * After obtaining a list of targets from the Discovery session, an
- * iSCSI initiator may initiate new sessions to log in to the discovered
- * targets for full operation. The initiator MAY keep the Discovery
- * session open and MAY send subsequent SendTargets commands to discover
- * new targets.\n
- * Examples:\n
- * This example is the SendTargets response from a single target that
- * has no other interface ports.\n
- * The initiator sends a Text Request that contains:
- * @verbatim
- *    SendTargets=All
- * @endverbatim
- * The target sends a Text Response that contains:
- * @verbatim
- *    TargetName=iqn.1993-11.de.uni-freiburg:diskarray.sn.8675309
- * @endverbatim
- * All the target had to return in this simple case was the target name.\n
- * It is assumed by the initiator that the IP address and TCP port for
- * this target are the same as those used on the current connection to
- * the default iSCSI target.\n
- * The next example has two internal iSCSI targets, each accessible via
- * two different ports with different IP addresses. The following is
- * the Text Response:
- * @verbatim
- *    TargetName=iqn.1993-11.de.uni-freiburg:diskarray.sn.8675309
- *    TargetAddress=10.1.0.45:5300,1
- *    TargetAddress=10.1.1.45:5300,2
- *    TargetName=iqn.1993-11.de.uni-freiburg:diskarray.sn.1234567
- *    TargetAddress=10.1.0.45:5300,1
- *    TargetAddress=10.1.1.45:5300,2
- * @endverbatim
- * Both targets share both addresses; the multiple addresses are likely
- * used to provide multi-path support. The initiator may connect to
- * either target name on either address. Each of the addresses has its
- * own Target Portal Group Tag; they do not support spanning multiple-
- * connection sessions with each other. Keep in mind that the Target
- * Portal Group Tags for the two named targets are independent of one
- * another; portal group "1" on the first target is not necessarily the
- * same as portal group "1" on the second target.\n
- * In the above example, a DNS host name or an IPv6 address could have
- * been returned instead of an IPv4 address.\n
- * The next Text Response shows a target that supports spanning sessions
- * across multiple addresses and further illustrates the use of the
- * Target Portal Group Tags:
- * @verbatim
- *    TargetName=iqn.1993-11.de.uni-freiburg:diskarray.sn.8675309
- *    TargetAddress=10.1.0.45:5300,1
- *    TargetAddress=10.1.1.46:5300,1
- *    TargetAddress=10.1.0.47:5300,2
- *    TargetAddress=10.1.1.48:5300,2
- *    TargetAddress=10.1.1.49:5300,3
- * @endverbatim
- * In this example, any of the target addresses can be used to reach the
- * same target. A single-connection session can be established to any
- * of these TCP addresses. A multiple-connection session could span
- * addresses .45 and .46 or .47 and .48 but cannot span any other
- * combination. A TargetAddress with its own tag (.49) cannot be
- * combined with any other address within the same session.\n
- * This SendTargets response does not indicate whether .49 supports
- * multiple connections per session; it is communicated via the
- * MaxConnections text key upon login to the target.
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_SEND_TARGETS ((const uint8_t *) "SendTargets\0\0\0\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: Initial Ready To Transfer.
- *
- * @verbatim
- * Use: LO
- * Senders: Initiator and target
- * Scope: SW
- * Irrelevant when: SessionType=Discovery
- * InitialR2T=<boolean-value>
- * Examples:
- *    I->InitialR2T=No
- *    T->InitialR2T=No
- * Default is Yes.
- * @endverbatim
- * Result function is OR.\n
- * The InitialR2T key is used to turn off the default use of R2T for
- * unidirectional operations and the output part of bidirectional
- * commands, thus allowing an initiator to start sending data to a
- * target as if it has received an initial R2T with Buffer
- * Offset=Immediate Data Length and Desired Data Transfer
- * Length=(min(FirstBurstLength, Expected Data Transfer Length) -
- * Received Immediate Data Length).\n
- * The default action is that R2T is required, unless both the initiator
- * and the target send this key-pair attribute specifying InitialR2T=No.
- * Only the first outgoing data burst (immediate data and/or separate
- * PDUs) can be sent unsolicited (i.e., not requiring an explicit R2T).
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_INITIAL_R2T ((const uint8_t *) "InitialR2T\0\0\0\0\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: Immediate data.
- *
- * @verbatim
- * Use: LO
- * Senders: Initiator and target
- * Scope: SW
- * Irrelevant when: SessionType=Discovery
- * ImmediateData=<boolean-value>
- * Default is Yes.
- * @endverbatim
- * Result function is AND.\n
- * The initiator and target negotiate support for immediate data. To
- * turn immediate data off, the initiator or target must state its
- * desire to do soImmediateData can be turned on if both the
- * initiator and target have ImmediateData=Yes.\n
- * If ImmediateData is set to Yes and InitialR2T is set to Yes
- * (default), then only immediate data are accepted in the first burst.
- * If ImmediateData is set to No and InitialR2T is set to Yes, then the
- * initiator MUST NOT send unsolicited data and the target MUST reject
- * unsolicited data with the corresponding response code.\n
- * If ImmediateData is set to No and InitialR2T is set to No, then the
- * initiator MUST NOT send unsolicited immediate data but MAY send one
- * unsolicited burst of Data-OUT PDUs.\n
- * If ImmediateData is set to Yes and InitialR2T is set to No, then the
- * initiator MAY send unsolicited immediate data and/or one unsolicited
- * burst of Data-OUT PDUs.\n
- * The following table is a summary of unsolicited data options:
- * InitialR2T | ImmediateData | Unsolicited Data-Out PDUs | ImmediateData
- * :--------- | :------------ | :------------------------ | :------------
- * | No       | No            | Yes                       | No          |
- * | No       | Yes           | Yes                       | Yes         |
- * | Yes      | No            | No                        | No          |
- * | Yes      | Yes           | No                        | Yes         |
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_IMMEDIATE_DATA ((const uint8_t *) "ImmediateData\0\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: Maximum receive DataSegmentLength.
- *
- * @verbatim
- * Use: ALL, Declarative
- * Senders: Initiator and target
- * Scope: CO
- * MaxRecvDataSegmentLength=<numerical-value-512-to-(2**24 - 1)>
- * Default is 8192 bytes.
- * @endverbatim
- * The initiator or target declares the maximum data segment length in
- * bytes it can receive in an iSCSI PDU.\n
- * The transmitter (initiator or target) is required to send PDUs with a
- * data segment that does not exceed MaxRecvDataSegmentLength of the
- * receiver.\n
- * A target receiver is additionally limited by MaxBurstLength for
- * solicited data and FirstBurstLength for unsolicited dataAn
- * initiator MUST NOT send solicited PDUs exceeding MaxBurstLength nor
- * unsolicited PDUs exceeding FirstBurstLength (or FirstBurstLength-
- * Immediate Data Length if immediate data were sent).
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_RECV_DS_LEN ((const uint8_t *) "MaxRecvDataSegmentLength\0\0\0\0\0\0\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: Maximum burst length.
- *
- * @verbatim
- * Use: LO
- * Senders: Initiator and target
- * Scope: SW
- * Irrelevant when: SessionType=Discovery
- * MaxBurstLength=<numerical-value-512-to-(2**24 - 1)>
- * Default is 262144 (256 KB).
- * @endverbatim
- * Result function is Minimum.\n
- * The initiator and target negotiate the maximum SCSI data payload in
- * bytes in a Data-In or a solicited Data-Out iSCSI sequence. A
- * sequence consists of one or more consecutive Data-In or Data-Out PDUs
- * that end with a Data-In or Data-Out PDU with the F bit set to 1.
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_BURST_LEN ((const uint8_t *) "MaxBurstLength\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: First burst length.
- *
- * @verbatim
- * Use: LO
- * Senders: Initiator and target
- * Scope: SW
- * Irrelevant when: SessionType=Discovery
- * Irrelevant when: ( InitialR2T=Yes and ImmediateData=No )
- * FirstBurstLength=<numerical-value-512-to-(2**24 - 1)>
- * Default is 65536 (64 KB).
- * @endverbatim
- * Result function is Minimum.\n
- * The initiator and target negotiate the maximum amount in bytes of
- * unsolicited data an iSCSI initiator may send to the target during the
- * execution of a single SCSI command. This covers the immediate data
- * (if any) and the sequence of unsolicited Data-Out PDUs (if any) that
- * follow the command.\n
- * FirstBurstLength MUST NOT exceed MaxBurstLength.
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_FIRST_BURST_LEN ((const uint8_t *) "FirstBurstLength\0\0\0\0\0\0\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: Default time to wait.
- *
- * @verbatim
- * Use: LO
- * Senders: Initiator and target
- * Scope: SW
- * DefaultTime2Wait=<numerical-value-0-to-3600>
- * Default is 2.
- * @endverbatim
- * Result function is Maximum.\n
- * The initiator and target negotiate the minimum time, in seconds, to
- * wait before attempting an explicit/implicit logout or an active task
- * reassignment after an unexpected connection termination or a
- * connection reset.\n
- * A value of 0 indicates that logout or active task reassignment can be
- * attempted immediately.
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DEFAULT_TIME_WAIT ((const uint8_t *) "DefaultTime2Wait\0\0\0\0\0\0\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: Default time to retain.
- *
- * @verbatim
- * Use: LO
- * Senders: Initiator and target
- * Scope: SW
- * DefaultTime2Retain=<numerical-value-0-to-3600>
- * Default is 20.
- * @endverbatim
- * Result function is Minimum.\n
- * The initiator and target negotiate the maximum time, in seconds,
- * after an initial wait (Time2Wait), before which an active task
- * reassignment is still possible after an unexpected connection
- * termination or a connection reset.\n
- * This value is also the session state timeout if the connection in
- * question is the last LOGGED_IN connection in the session.\n
- * A value of 0 indicates that connection/task state is immediately
- * discarded by the target.
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DEFAULT_TIME_RETAIN ((const uint8_t *) "DefaultTime2Retain\0\0\0\0\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: Maximum outstanding Ready To Transfer.
- *
- * @verbatim
- * Use: LO
- * Senders: Initiator and target
- * Scope: SW
- * MaxOutstandingR2T=<numerical-value-from-1-to-65535>
- * Irrelevant when: SessionType=Discovery
- * Default is 1.
- * @endverbatim
- * Result function is Minimum.\n
- * The initiator and target negotiate the maximum number of outstanding
- * R2Ts per task, excluding any implied initial R2T that might be part
- * of that task. An R2T is considered outstanding until the last data
- * PDU (with the F bit set to 1) is transferred or a sequence reception
- * timeout is encountered for that data sequence.
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_MAX_OUTSTANDING_R2T ((const uint8_t *) "MaxOutstandingR2T\0\0\0\0\0\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: Data Protocol Data Unit (PDU) in order.
- *
- * @verbatim
- * Use: LO
- * Senders: Initiator and target
- * Scope: SW
- * Irrelevant when: SessionType=Discovery
- * DataPDUInOrder=<boolean-value>
- * Default is Yes.
- * @endverbatim
- * Result function is OR.\n
- * "No" is used by iSCSI to indicate that the data PDUs within sequences
- * can be in any order. "Yes" is used to indicate that data PDUs within
- * sequences have to be at continuously increasing addresses and
- * overlays are forbidden.
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DATA_PDU_IN_ORDER ((const uint8_t *) "DataPDUInOrder\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: Data sequence in order.
- *
- * @verbatim
- * Use: LO
- * Senders: Initiator and target
- * Scope: SW
- * Irrelevant when: SessionType=Discovery
- * DataSequenceInOrder=<boolean-value>
- * Default is Yes.
- * @endverbatim
- * Result function is OR.\n
- * A data sequence is a sequence of Data-In or Data-Out PDUs that end
- * with a Data-In or Data-Out PDU with the F bit set to 1. A Data-Out
- * sequence is sent either unsolicited or in response to an R2T.\n
- * Sequences cover an offset-range.\n
- * If DataSequenceInOrder is set to No, data PDU sequences may be
- * transferred in any order.\n
- * If DataSequenceInOrder is set to Yes, data sequences MUST be
- * transferred using continuously non-decreasing sequence offsets (R2T
- * buffer offset for writes, or the smallest SCSI Data-In buffer offset
- * within a read data sequence).\n
- * If DataSequenceInOrder is set to Yes, a target may retry at most the
- * last R2T, and an initiator may at most request retransmission for the
- * last read data sequence. For this reason, if ErrorRecoveryLevel is
- * not 0 and DataSequenceInOrder is set to Yes, then MaxOutstandingR2T
- * MUST be set to 1.
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_DATA_SEQ_IN_ORDER ((const uint8_t *) "DataSequenceInOrder\0\0\0\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: Error recovery level.
- *
- * @verbatim
- * Use: LO
- * Senders: Initiator and target
- * Scope: SW
- * ErrorRecoveryLevel=<numerical-value-0-to-2>
- * Default is 0.
- * @endverbatim
- * Result function is Minimum.\n
- * The initiator and target negotiate the recovery level supported.
- * Recovery levels represent a combination of recovery capabilities.
- * Each recovery level includes all the capabilities of the lower
- * recovery levels and adds some new ones to them.\n
- * In the description of recovery mechanisms, certain recovery classes
- * are specified.
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_ERR_RECOVERY_LEVEL ((const uint8_t *) "ErrorRecoveryLevel\0\0\0\0\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: X reversed vendor.
- *
- * @verbatim
- * Use: ALL
- * Senders: Initiator and target
- * Scope: specific key dependent
- * X-reversed.vendor.dns_name.do_something=
- * @endverbatim
- * Keys with this format are used for private extension purposes. These
- * keys always start with X- if unregistered with IANA (private). New
- * public keys (if registered with IANA via an IETF Review RFC5226) no
- * longer have an X# name prefix requirement; implementers may propose
- * any intuitive unique name.\n
- * For unregistered keys, to identify the vendor we suggest using the
- * reversed DNS-name as a prefix to the key-proper.\n
- * The part of key-name following X- MUST conform to the format for
- * key-name.\n
- * Vendor-specific keys MUST ONLY be used in Normal sessions.\n
- * Support for public or private extension keys is OPTIONAL.
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_PRIV_EXT_KEY_FMT ((const uint8_t *) "X-reversed.vendor\0\0\0\0\0\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: Task reporting.
- *
- * @verbatim
- * Use: LO
- * Senders: Initiator and target
- * Scope: SW
- * Irrelevant when: SessionType=Discovery
- * TaskReporting=<list-of-values>
- * Default is RFC3720.
- * @endverbatim
- * This key is used to negotiate the task completion reporting semantics
- * from the SCSI target. The following table describes the semantics
- * that an iSCSI target MUST support for respective negotiated key
- * values. Whenever this key is negotiated, at least the RFC3720 and
- * ResponseFence values MUST be offered as options by the negotiation
- * originator.
- * Name            | Description
- * :-------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------
- * | RFC3720       | RFC 3720-compliant semantics. Response fencing is not guaranteed, and fast completion of multi-task aborting is not supported.
- * | ResponseFence | Response Fence semantics MUST be supported in reporting task completions.
- * | FastAbort     | Updated fast multi-task abort semantics defined in MUST be supported. Support for the Response. Fence is implied - i.e., semantics MUST be supported as well.
- *
- * When TaskReporting is not negotiated to FastAbort, the
- * standard multi-task abort semantics MUST be used.
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_TASK_REPORTING ((const uint8_t *) "TaskReporting\0\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: X Node architecture.
- *
- * @verbatim
- * Use: LO, Declarative
- * Senders: Initiator and target
- * Scope: SW
- * X#NodeArchitecture=<list-of-values>
- * Default is None.
- * Examples:
- *    X#NodeArchitecture=ExampleOS/v1234,ExampleInc_SW_Initiator/1.05a
- *    X#NodeArchitecture=ExampleInc_HW_Initiator/4010,Firmware/2.0.0.5
- *    X#NodeArchitecture=ExampleInc_SW_Initiator/2.1,CPU_Arch/i686
- * @endverbatim
- * This document does not define the structure or content of the list of
- * values.\n
- * The initiator or target declares the details of its iSCSI node
- * architecture to the remote endpoint. These details may include, but
- * are not limited to, iSCSI vendor software, firmware, or hardware
- * versions; the OS version; or hardware architecture. This key may be
- * declared on a Discovery session or a Normal session.\n
- * The length of the key value (total length of the list-of-values) MUST
- * NOT be greater than 255 bytes.\n
- * X#NodeArchitecture MUST NOT be redeclared during the Login Phase.\n
- * Functional behavior of the iSCSI node (this includes the iSCSI
- * protocol logic - the SCSI, iSCSI, and TCP/IP protocols) MUST NOT
- * depend on the presence, absence, or content of the X#NodeArchitecture
- * key. The key MUST NOT be used by iSCSI nodes for interoperability or
- * for exclusion of other nodes. To ensure proper use, key values
- * SHOULD be set by the node itself, and there SHOULD NOT be provisions
- * for the key values to contain user-defined text.\n
- * Nodes implementing this key MUST choose one of the following
- * implementation options:\n
- * - only transmit the key,
- * - only log the key values received from other nodes, or
- * - both transmit and log the key values.
- *
- * Each node choosing to implement transmission of the key values MUST
- * be prepared to handle the response of iSCSI nodes that do not
- * understand the key.\n
- * Nodes that implement transmission and/or logging of the key values
- * may also implement administrative mechanisms that disable and/or
- * change the logging and key transmission details.\n
- * Thus, a valid behavior for this key may be that a node is completely
- * silent (the node does not transmit any key value and simply discards
- * any key values it receives without issuing a NotUnderstood response).
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_X_NODE_ARCH ((const uint8_t *) "X#NodeArchitecture\0\0\0\0\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: IFMarker (obseleted).
- *
- * This document obsoletes the following keys defined in RFC3720:\n
- * IFMarker, OFMarker, OFMarkInt, and IFMarkInt. However, iSCSI
- * mplementations compliant to this document may still receive these
- * obsoleted keys - i.e., in a responder role - in a text negotiation.\n
- * When an IFMarker or OFMarker key is received, a compliant iSCSI
- * implementation SHOULD respond with the constant "Reject" value. The
- * implementation MAY alternatively respond with a "No" value.\n
- * However, the implementation MUST NOT respond with a "NotUnderstood"
- * value for either of these keys.\n
- * When an IFMarkInt or OFMarkInt key is received, a compliant iSCSI
- * implementation MUST respond with the constant "Reject" value. The
- * implementation MUST NOT respond with a "NotUnderstood" value for
- * either of these keys.
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_IF_MARKER   ((const uint8_t *) "IFMarker\0\0\0\0\0\0\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: OFMarker (obseleted).
- *
- * This document obsoletes the following keys defined in RFC3720:\n
- * IFMarker, OFMarker, OFMarkInt, and IFMarkInt. However, iSCSI
- * mplementations compliant to this document may still receive these
- * obsoleted keys - i.e., in a responder role - in a text negotiation.\n
- * When an IFMarker or OFMarker key is received, a compliant iSCSI
- * implementation SHOULD respond with the constant "Reject" value. The
- * implementation MAY alternatively respond with a "No" value.\n
- * However, the implementation MUST NOT respond with a "NotUnderstood"
- * value for either of these keys.\n
- * When an IFMarkInt or OFMarkInt key is received, a compliant iSCSI
- * implementation MUST respond with the constant "Reject" value. The
- * implementation MUST NOT respond with a "NotUnderstood" value for
- * either of these keys.
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_OF_MARKER   ((const uint8_t *) "OFMarker\0\0\0\0\0\0\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: OFMarkInt (obseleted).
- *
- * This document obsoletes the following keys defined in RFC3720:\n
- * IFMarker, OFMarker, OFMarkInt, and IFMarkInt. However, iSCSI
- * mplementations compliant to this document may still receive these
- * obsoleted keys - i.e., in a responder role - in a text negotiation.\n
- * When an IFMarker or OFMarker key is received, a compliant iSCSI
- * implementation SHOULD respond with the constant "Reject" value. The
- * implementation MAY alternatively respond with a "No" value.\n
- * However, the implementation MUST NOT respond with a "NotUnderstood"
- * value for either of these keys.\n
- * When an IFMarkInt or OFMarkInt key is received, a compliant iSCSI
- * implementation MUST respond with the constant "Reject" value. The
- * implementation MUST NOT respond with a "NotUnderstood" value for
- * either of these keys.
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_OF_MARK_INT ((const uint8_t *) "OFMarkInt\0\0\0\0\0\0")
-
-/**
- * @brief Login/Text Operational Session Text Key: IFMarkInt (obseleted).
- *
- * This document obsoletes the following keys defined in RFC3720:\n
- * IFMarker, OFMarker, OFMarkInt, and IFMarkInt. However, iSCSI
- * mplementations compliant to this document may still receive these
- * obsoleted keys - i.e., in a responder role - in a text negotiation.\n
- * When an IFMarker or OFMarker key is received, a compliant iSCSI
- * implementation SHOULD respond with the constant "Reject" value. The
- * implementation MAY alternatively respond with a "No" value.\n
- * However, the implementation MUST NOT respond with a "NotUnderstood"
- * value for either of these keys.\n
- * When an IFMarkInt or OFMarkInt key is received, a compliant iSCSI
- * implementation MUST respond with the constant "Reject" value. The
- * implementation MUST NOT respond with a "NotUnderstood" value for
- * either of these keys.
- */
-#define ISCSI_LOGIN_AUTH_SESSION_TEXT_KEY_IF_MARK_INT ((const uint8_t *) "IFMarkInt\0\0\0\0\0\0")
-
-
 /// Login request Next Stage (NSG) flags: SecurityNegotiation.
 #define ISCSI_LOGIN_REQ_FLAGS_NEXT_STAGE_SECURITY_NEGOTIATION          0x0
 
@@ -8436,119 +4355,119 @@ typedef struct __attribute__((packed)) iscsi_isid {
  * Login Requests are always considered as immediate.
  */
 typedef struct __attribute__((packed)) iscsi_login_req_packet {
-    /// Always 0x03 according to iSCSI specification.
-    uint8_t opcode;
-
-    /// Login request flags.
-    int8_t flags;
-
-    /**
-     * @brief Version-max indicates the maximum version number supported.
-     *
-     * All Login Requests within the Login Phase MUST carry the same
-     * Version-max. Currently, this is always 0.\n
-     * The target MUST use the value presented with the first Login Request.
-     */
-    uint8_t version_max;
-
-    /**
-     * @brief Version-min indicates the minimum version number supported.
-     *
-     * All Login Requests within the Login Phase MUST carry the same
-     * Version-min. The target MUST use the value presented with the first
-     * Login Request. Always 0 for now.
-     */
-    uint8_t version_min;
-
-    /// TotalAHSLength.
-    uint8_t total_ahs_len;
-
-    /// DataSegmentLength.
-    uint8_t ds_len[3];
-
-    /// Initiator Session ID (ISID).
-    iscsi_isid isid;
-
-    /**
-     * @brief Target Session Identifying Handle (TSIH).
-     *
-     * The TSIH must be set in the first Login Request. The reserved value
-     * 0 MUST be used on the first connection for a new session. Otherwise,
-     * the TSIH sent by the target at the conclusion of the successful login
-     * of the first connection for this session MUST be used. The TSIH
-     * identifies to the target the associated existing session for this new
-     * connection.\n
-     * All Login Requests within a Login Phase MUST carry the same TSIH.
-     * The target MUST check the value presented with the first Login
-     * Request.
-     */
-    uint16_t tsih;
-
-    /// Initiator Task Tag (ITT).
-    uint32_t init_task_tag;
-
-    /**
-     * @brief Connection ID (CID).
-     *
-     * The CID provides a unique ID for this connection within the session.\n
-     * All Login Requests within the Login Phase MUST carry the same CID.
-     * The target MUST use the value presented with the first Login Request.\n
-     * A Login Request with a non-zero TSIH and a CID equal to that of an
-     * existing connection implies a logout of the connection followed by a
-     * login.
-     */
-    uint16_t cid;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint16_t reserved;
-
-    /**
-     * @brief CmdSN.
-     *
-     * The CmdSN is either the initial command sequence number of a session
-     * (for the first Login Request of a session - the "leading" login) or
-     * the command sequence number in the command stream if the login is for
-     * a new connection in an existing session.\n
-     * Examples:
-     * - Login on a leading connection: If the leading login carries the
-     *   CmdSN 123, all other Login Requests in the same Login Phase carry
-     *   the CmdSN 123, and the first non-immediate command in the Full
-     *   Feature Phase also carries the CmdSN 123.
-     * - Login on other than a leading connection: If the current CmdSN at
-     *   the time the first login on the connection is issued is 500, then
-     *   that PDU carries CmdSN=500. Subsequent Login Requests that are
-     *   needed to complete this Login Phase may carry a CmdSN higher than
-     *   500 if non-immediate requests that were issued on other connections
-     *   in the same session advance the CmdSN.
-     *
-     * If the Login Request is a leading Login Request, the target MUST use
-     * the value presented in the CmdSN as the target value for the
-     * ExpCmdSN.
-     */
-    uint32_t cmd_sn;
-
-    /**
-     * @brief ExpStatSN.
-     *
-     * For the first Login Request on a connection, this is the ExpStatSN
-     * for the old connection, and this field is only valid if the Login
-     * Request restarts a connection.\n
-     * For subsequent Login Requests, it is used to acknowledge the Login
-     * Responses with their increasing StatSN values.
-     */
-    uint32_t exp_stat_sn;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint64_t reserved2[2];
-
-    /**
-     * @brief Data segment - Login Parameters in Text Request Format.
-     *
-     * The initiator MUST provide some basic parameters in order
-     * to enable the target to determine if the initiator may use
-     * the target's resources and the initial text parameters for the security exchange
-     */
-    iscsi_scsi_ds_cmd_data ds_cmd_data;
+	/// Always 0x03 according to iSCSI specification.
+	uint8_t opcode;
+
+	/// Login request flags.
+	int8_t flags;
+
+	/**
+	 * @brief Version-max indicates the maximum version number supported.
+	 *
+	 * All Login Requests within the Login Phase MUST carry the same
+	 * Version-max. Currently, this is always 0.\n
+	 * The target MUST use the value presented with the first Login Request.
+	 */
+	uint8_t version_max;
+
+	/**
+	 * @brief Version-min indicates the minimum version number supported.
+	 *
+	 * All Login Requests within the Login Phase MUST carry the same
+	 * Version-min. The target MUST use the value presented with the first
+	 * Login Request. Always 0 for now.
+	 */
+	uint8_t version_min;
+
+	/// TotalAHSLength.
+	uint8_t total_ahs_len;
+
+	/// DataSegmentLength.
+	uint8_t ds_len[3];
+
+	/// Initiator Session ID (ISID).
+	iscsi_isid isid;
+
+	/**
+	 * @brief Target Session Identifying Handle (TSIH).
+	 *
+	 * The TSIH must be set in the first Login Request. The reserved value
+	 * 0 MUST be used on the first connection for a new session. Otherwise,
+	 * the TSIH sent by the target at the conclusion of the successful login
+	 * of the first connection for this session MUST be used. The TSIH
+	 * identifies to the target the associated existing session for this new
+	 * connection.\n
+	 * All Login Requests within a Login Phase MUST carry the same TSIH.
+	 * The target MUST check the value presented with the first Login
+	 * Request.
+	 */
+	uint16_t tsih;
+
+	/// Initiator Task Tag (ITT).
+	uint32_t init_task_tag;
+
+	/**
+	 * @brief Connection ID (CID).
+	 *
+	 * The CID provides a unique ID for this connection within the session.\n
+	 * All Login Requests within the Login Phase MUST carry the same CID.
+	 * The target MUST use the value presented with the first Login Request.\n
+	 * A Login Request with a non-zero TSIH and a CID equal to that of an
+	 * existing connection implies a logout of the connection followed by a
+	 * login.
+	 */
+	uint16_t cid;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint16_t reserved;
+
+	/**
+	 * @brief CmdSN.
+	 *
+	 * The CmdSN is either the initial command sequence number of a session
+	 * (for the first Login Request of a session - the "leading" login) or
+	 * the command sequence number in the command stream if the login is for
+	 * a new connection in an existing session.\n
+	 * Examples:
+	 * - Login on a leading connection: If the leading login carries the
+	 *   CmdSN 123, all other Login Requests in the same Login Phase carry
+	 *   the CmdSN 123, and the first non-immediate command in the Full
+	 *   Feature Phase also carries the CmdSN 123.
+	 * - Login on other than a leading connection: If the current CmdSN at
+	 *   the time the first login on the connection is issued is 500, then
+	 *   that PDU carries CmdSN=500. Subsequent Login Requests that are
+	 *   needed to complete this Login Phase may carry a CmdSN higher than
+	 *   500 if non-immediate requests that were issued on other connections
+	 *   in the same session advance the CmdSN.
+	 *
+	 * If the Login Request is a leading Login Request, the target MUST use
+	 * the value presented in the CmdSN as the target value for the
+	 * ExpCmdSN.
+	 */
+	uint32_t cmd_sn;
+
+	/**
+	 * @brief ExpStatSN.
+	 *
+	 * For the first Login Request on a connection, this is the ExpStatSN
+	 * for the old connection, and this field is only valid if the Login
+	 * Request restarts a connection.\n
+	 * For subsequent Login Requests, it is used to acknowledge the Login
+	 * Responses with their increasing StatSN values.
+	 */
+	uint32_t exp_stat_sn;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint64_t reserved2[2];
+
+	/**
+	 * @brief Data segment - Login Parameters in Text Request Format.
+	 *
+	 * The initiator MUST provide some basic parameters in order
+	 * to enable the target to determine if the initiator may use
+	 * the target's resources and the initial text parameters for the security exchange
+	 */
+	iscsi_scsi_ds_cmd_data ds_cmd_data;
 } iscsi_login_req_packet;
 
 
@@ -8795,107 +4714,107 @@ typedef struct __attribute__((packed)) iscsi_login_req_packet {
  * Phase.
  */
 typedef struct __attribute__((packed)) iscsi_login_response_packet {
-    /// Always 0x23 according to iSCSI specification.
-    uint8_t opcode;
-
-    /// Login response flags.
-    int8_t flags;
-
-    /**
-     * @brief This is the highest version number supported by the target.
-     *
-     * All Login Responses within the Login Phase MUST carry the same
-     * Version-max.
-     */
-    uint8_t version_max;
-
-    /**
-     * @brief Version-active indicates the highest version supported by the target and initiator.
-     *
-     * If the target does not support a version within the
-     * range specified by the initiator, the target rejects the login and
-     * this field indicates the lowest version supported by the target.
-     * All Login Responses within the Login Phase MUST carry the same
-     * Version-active.\n
-     * The initiator MUST use the value presented as a response to the first
-     * Login Request.
-     */
-    uint8_t version_active;
-
-    /// TotalAHSLength.
-    uint8_t total_ahs_len;
-
-    /// DataSegmentLength.
-    uint8_t ds_len[3];
-
-    /// Initiator Session ID (ISID).
-    iscsi_isid isid;
-
-    /**
-     * @brief Target Session Identifying Handle (TSIH).
-     *
-     * The TSIH is the target-assigned session-identifying handle. Its
-     * internal format and content are not defined by this protocol, except
-     * for the value 0, which is reserved. With the exception of the Login
-     * Final-Response in a new session, this field should be set to the TSIH
-     * provided by the initiator in the Login Request. For a new session,
-     * the target MUST generate a non-zero TSIH and ONLY return it in the
-     * Login Final-Response.
-     */
-    uint16_t tsih;
-
-    /// Initiator Task Tag (ITT).
-    uint32_t init_task_tag;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint32_t reserved;
-
-    /**
-     * @brief StatSN.
-     *
-     * For the first Login Response (the response to the first Login
-     * Request), this is the starting status sequence number for the
-     * connection. The next response of any kind - including the next
-     * Login Response, if any, in the same Login Phase - will carry this
-     * number + 1. This field is only valid if the Status-Class is 0.
-     */
-    uint32_t stat_sn;
-
-    /// ExpCmdSN.
-    uint32_t exp_cmd_sn;
-
-    /// MaxCmdSN.
-    uint32_t max_cmd_sn;
-
-    /**
-     * @brief Status-class.
-     *
-     * Status-class (see above for details). If the Status-Class is
-     * not 0, the initiator and target MUST close the TCP connection
-     * If the target wishes to reject the Login Request for more than one
-     * reason, it should return the primary reason for the rejection.
-     */
-    uint8_t status_class;
-
-    /// Status-detail.
-    uint8_t status_detail;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint16_t reserved2;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint64_t reserved3;
-
-    /**
-     * @brief Data segment - Login Parameters in Text Request Format.
-     *
-     * The target MUST provide some basic parameters in order to enable the
-     * initiator to determine if it is connected to the correct port and the
-     * initial text parameters for the security exchange.\n
-     * All the rules specified for Text Responses also hold for Login
-     * Responses.
-     */
-    iscsi_scsi_ds_cmd_data ds_cmd_data;
+	/// Always 0x23 according to iSCSI specification.
+	uint8_t opcode;
+
+	/// Login response flags.
+	int8_t flags;
+
+	/**
+	 * @brief This is the highest version number supported by the target.
+	 *
+	 * All Login Responses within the Login Phase MUST carry the same
+	 * Version-max.
+	 */
+	uint8_t version_max;
+
+	/**
+	 * @brief Version-active indicates the highest version supported by the target and initiator.
+	 *
+	 * If the target does not support a version within the
+	 * range specified by the initiator, the target rejects the login and
+	 * this field indicates the lowest version supported by the target.
+	 * All Login Responses within the Login Phase MUST carry the same
+	 * Version-active.\n
+	 * The initiator MUST use the value presented as a response to the first
+	 * Login Request.
+	 */
+	uint8_t version_active;
+
+	/// TotalAHSLength.
+	uint8_t total_ahs_len;
+
+	/// DataSegmentLength.
+	uint8_t ds_len[3];
+
+	/// Initiator Session ID (ISID).
+	iscsi_isid isid;
+
+	/**
+	 * @brief Target Session Identifying Handle (TSIH).
+	 *
+	 * The TSIH is the target-assigned session-identifying handle. Its
+	 * internal format and content are not defined by this protocol, except
+	 * for the value 0, which is reserved. With the exception of the Login
+	 * Final-Response in a new session, this field should be set to the TSIH
+	 * provided by the initiator in the Login Request. For a new session,
+	 * the target MUST generate a non-zero TSIH and ONLY return it in the
+	 * Login Final-Response.
+	 */
+	uint16_t tsih;
+
+	/// Initiator Task Tag (ITT).
+	uint32_t init_task_tag;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint32_t reserved;
+
+	/**
+	 * @brief StatSN.
+	 *
+	 * For the first Login Response (the response to the first Login
+	 * Request), this is the starting status sequence number for the
+	 * connection. The next response of any kind - including the next
+	 * Login Response, if any, in the same Login Phase - will carry this
+	 * number + 1. This field is only valid if the Status-Class is 0.
+	 */
+	uint32_t stat_sn;
+
+	/// ExpCmdSN.
+	uint32_t exp_cmd_sn;
+
+	/// MaxCmdSN.
+	uint32_t max_cmd_sn;
+
+	/**
+	 * @brief Status-class.
+	 *
+	 * Status-class (see above for details). If the Status-Class is
+	 * not 0, the initiator and target MUST close the TCP connection
+	 * If the target wishes to reject the Login Request for more than one
+	 * reason, it should return the primary reason for the rejection.
+	 */
+	uint8_t status_class;
+
+	/// Status-detail.
+	uint8_t status_detail;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint16_t reserved2;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint64_t reserved3;
+
+	/**
+	 * @brief Data segment - Login Parameters in Text Request Format.
+	 *
+	 * The target MUST provide some basic parameters in order to enable the
+	 * initiator to determine if it is connected to the correct port and the
+	 * initial text parameters for the security exchange.\n
+	 * All the rules specified for Text Responses also hold for Login
+	 * Responses.
+	 */
+	iscsi_scsi_ds_cmd_data ds_cmd_data;
 } iscsi_login_response_packet;
 
 
@@ -9003,82 +4922,79 @@ typedef struct __attribute__((packed)) iscsi_login_response_packet {
  * recovery, unless the session is also closed.
  */
 typedef struct __attribute__((packed)) iscsi_logout_req_packet {
-    /// Always 6 according to iSCSI specification.
-    uint8_t opcode;
-
-    /**
-     * @brief Reason code.
-     *
-     * A target implicitly terminates the active tasks due to the iSCSI
-     * protocol in the following cases:
-     * -# When a connection is implicitly or explicitly logged out with
-     *    the reason code "close the connection" and there are active
-     *    tasks allegiant to that connection.
-     * -# When a connection fails and eventually the connection state
-     *    times out and there are active tasks allegiant to that
-     *    connection
-     * -# When a successful recovery Logout is performed while there are
-     *    active tasks allegiant to that connection and those tasks
-     *    eventually time out after the Time2Wait and Time2Retain periods
-     *    without allegiance reassignment
-     * -# When a connection is implicitly or explicitly logged out with
-     *    the reason code "close the session" and there are active tasks
-     *    in that session
-     *
-     * If the tasks terminated in any of the above cases are SCSI tasks,
-     * they must be internally terminated as if with CHECK CONDITION status.
-     * This status is only meaningful for appropriately handling the
-     * internal SCSI state and SCSI side effects with respect to ordering,
-     * because this status is never communicated back as a terminating
-     * status to the initiator. However, additional actions may have to be
-     * taken at the SCSI level, depending on the SCSI context as defined by
-     * the SCSI standards (e.g., queued commands and ACA; UA for the next
-     * command on the I_T nexus in cases a), b), and c) above). After the
-     * tasks are terminated, the target MUST report a Unit Attention condition
-     * on the next command processed on any connection for each affected
-     * I_T_L nexus with the status of CHECK CONDITION, the ASC/ASCQ value
-     * of 0x47 / 0x7F ("SOME COMMANDS CLEARED BY ISCSI PROTOCOL EVENT"), etc.
-     */
-    int8_t reason_code;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint16_t reserved;
-
-    /// TotalAHSLength (MUST be 0 for this PDU).
-    uint8_t total_ahs_len;
-
-    /// DataSegmentLength (MUST be 0 for this PDU).
-    uint8_t ds_len[3];
-
-    /// Reserved for future usage, always MUST be 0.
-    uint64_t reserved2;
-
-    /// Initiator Task Tag (ITT).
-    uint32_t init_task_tag;
-
-    /**
-     * @brief Connection ID (CID).
-     *
-     * This is the connection ID of the connection to be closed (including
-     * closing the TCP stream). This field is only valid if the reason code
-     * is not "close the session".
-     */
-    uint16_t cid;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint16_t reserved3;
-
-    /// CmdSN.
-    uint32_t cmd_sn;
-
-    /// This is the last ExpStatSN value for the connection to be closed.
-    uint32_t exp_stat_sn;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint64_t reserved4[2];
-
-    /// Optional header digest.
-    iscsi_header_digest hdr_digest;
+	/// Always 6 according to iSCSI specification.
+	uint8_t opcode;
+
+	/**
+	 * @brief Reason code.
+	 *
+	 * A target implicitly terminates the active tasks due to the iSCSI
+	 * protocol in the following cases:
+	 * -# When a connection is implicitly or explicitly logged out with
+	 *    the reason code "close the connection" and there are active
+	 *    tasks allegiant to that connection.
+	 * -# When a connection fails and eventually the connection state
+	 *    times out and there are active tasks allegiant to that
+	 *    connection
+	 * -# When a successful recovery Logout is performed while there are
+	 *    active tasks allegiant to that connection and those tasks
+	 *    eventually time out after the Time2Wait and Time2Retain periods
+	 *    without allegiance reassignment
+	 * -# When a connection is implicitly or explicitly logged out with
+	 *    the reason code "close the session" and there are active tasks
+	 *    in that session
+	 *
+	 * If the tasks terminated in any of the above cases are SCSI tasks,
+	 * they must be internally terminated as if with CHECK CONDITION status.
+	 * This status is only meaningful for appropriately handling the
+	 * internal SCSI state and SCSI side effects with respect to ordering,
+	 * because this status is never communicated back as a terminating
+	 * status to the initiator. However, additional actions may have to be
+	 * taken at the SCSI level, depending on the SCSI context as defined by
+	 * the SCSI standards (e.g., queued commands and ACA; UA for the next
+	 * command on the I_T nexus in cases a), b), and c) above). After the
+	 * tasks are terminated, the target MUST report a Unit Attention condition
+	 * on the next command processed on any connection for each affected
+	 * I_T_L nexus with the status of CHECK CONDITION, the ASC/ASCQ value
+	 * of 0x47 / 0x7F ("SOME COMMANDS CLEARED BY ISCSI PROTOCOL EVENT"), etc.
+	 */
+	int8_t reason_code;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint16_t reserved;
+
+	/// TotalAHSLength (MUST be 0 for this PDU).
+	uint8_t total_ahs_len;
+
+	/// DataSegmentLength (MUST be 0 for this PDU).
+	uint8_t ds_len[3];
+
+	/// Reserved for future usage, always MUST be 0.
+	uint64_t reserved2;
+
+	/// Initiator Task Tag (ITT).
+	uint32_t init_task_tag;
+
+	/**
+	 * @brief Connection ID (CID).
+	 *
+	 * This is the connection ID of the connection to be closed (including
+	 * closing the TCP stream). This field is only valid if the reason code
+	 * is not "close the session".
+	 */
+	uint16_t cid;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint16_t reserved3;
+
+	/// CmdSN.
+	uint32_t cmd_sn;
+
+	/// This is the last ExpStatSN value for the connection to be closed.
+	uint32_t exp_stat_sn;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint64_t reserved4[2];
 } iscsi_logout_req_packet;
 
 
@@ -9105,272 +5021,90 @@ typedef struct __attribute__((packed)) iscsi_logout_req_packet {
  * was session close).
  */
 typedef struct __attribute__((packed)) iscsi_logout_response_packet {
-    /// Always 0x26 according to iSCSI specification.
-    uint8_t opcode;
-
-    /// Reserved for future usage (always MUST be 0x80 for now).
-    int8_t flags;
-
-    /// Response.
-    uint8_t response;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint8_t reserved;
-
-    /// TotalAHSLength (MUST be 0 for this PDU).
-    uint8_t total_ahs_len;
-
-    /// DataSegmentLength (MUST be 0 for this PDU).
-    uint8_t ds_len[3];
-
-    /// Reserved for future usage, always MUST be 0.
-    uint64_t reserved2;
-
-    /// Initiator Task Tag (ITT).
-    uint32_t init_task_tag;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint32_t reserved3;
-
-    /// StatSN.
-    uint32_t stat_sn;
-
-    /// ExpCmdSN.
-    uint32_t exp_cmd_sn;
-
-    /// MaxCmdSN.
-    uint32_t max_cmd_sn;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint32_t reserved4;
-
-    /**
-     * @brief Time2Wait.
-     *
-     * If the Logout response code is 0 and the operational
-     * ErrorRecoveryLevel is 2, this is the minimum amount of time, in
-     * seconds, to wait before attempting task reassignment. If the Logout
-     * response code is 0 and the operational ErrorRecoveryLevel is less
-     * than 2, this field is to be ignored.\n
-     * This field is invalid if the Logout response code is 1.\n
-     * If the Logout response code is 2 or 3, this field specifies the
-     * minimum time to wait before attempting a new implicit or explicit
-     * logout.\n
-     * If Time2Wait is 0, the reassignment or a new Logout may be attempted
-     * immediately.
-     */
-    uint16_t time_wait;
-
-    /**
-     * @brief Time2Retain.
-     *
-     * If the Logout response code is 0 and the operational
-     * ErrorRecoveryLevel is 2, this is the maximum amount of time, in
-     * seconds, after the initial wait (Time2Wait) that the target waits for
-     * the allegiance reassignment for any active task, after which the task
-     * state is discarded. If the Logout response code is 0 and the
-     * operational ErrorRecoveryLevel is less than 2, this field is to be
-     * ignored.\n
-     * This field is invalid if the Logout response code is 1.\n
-     * If the Logout response code is 2 or 3, this field specifies the
-     * maximum amount of time, in seconds, after the initial wait
-     * (Time2Wait) that the target waits for a new implicit or explicit
-     * logout.\n
-     * If it is the last connection of a session, the whole session state is
-     * discarded after Time2Retain.\n
-     * If Time2Retain is 0, the target has already discarded the connection
-     * (and possibly the session) state along with the task states. No
-     * reassignment or Logout is required in this case.
-     */
-    uint16_t time_retain;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint32_t reserved5;
-
-    /// Optional header digest.
-    iscsi_header_digest hdr_digest;
+	/// Always 0x26 according to iSCSI specification.
+	uint8_t opcode;
+
+	/// Reserved for future usage (must be always 0x80 for now).
+	int8_t flags;
+
+	/// Response.
+	uint8_t response;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint8_t reserved;
+
+	/// TotalAHSLength (MUST be 0 for this PDU).
+	uint8_t total_ahs_len;
+
+	/// DataSegmentLength (MUST be 0 for this PDU).
+	uint8_t ds_len[3];
+
+	/// Reserved for future usage, always MUST be 0.
+	uint64_t reserved2;
+
+	/// Initiator Task Tag (ITT).
+	uint32_t init_task_tag;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint32_t reserved3;
+
+	/// StatSN.
+	uint32_t stat_sn;
+
+	/// ExpCmdSN.
+	uint32_t exp_cmd_sn;
+
+	/// MaxCmdSN.
+	uint32_t max_cmd_sn;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint32_t reserved4;
+
+	/**
+	 * @brief Time2Wait.
+	 *
+	 * If the Logout response code is 0 and the operational
+	 * ErrorRecoveryLevel is 2, this is the minimum amount of time, in
+	 * seconds, to wait before attempting task reassignment. If the Logout
+	 * response code is 0 and the operational ErrorRecoveryLevel is less
+	 * than 2, this field is to be ignored.\n
+	 * This field is invalid if the Logout response code is 1.\n
+	 * If the Logout response code is 2 or 3, this field specifies the
+	 * minimum time to wait before attempting a new implicit or explicit
+	 * logout.\n
+	 * If Time2Wait is 0, the reassignment or a new Logout may be attempted
+	 * immediately.
+	 */
+	uint16_t time_wait;
+
+	/**
+	 * @brief Time2Retain.
+	 *
+	 * If the Logout response code is 0 and the operational
+	 * ErrorRecoveryLevel is 2, this is the maximum amount of time, in
+	 * seconds, after the initial wait (Time2Wait) that the target waits for
+	 * the allegiance reassignment for any active task, after which the task
+	 * state is discarded. If the Logout response code is 0 and the
+	 * operational ErrorRecoveryLevel is less than 2, this field is to be
+	 * ignored.\n
+	 * This field is invalid if the Logout response code is 1.\n
+	 * If the Logout response code is 2 or 3, this field specifies the
+	 * maximum amount of time, in seconds, after the initial wait
+	 * (Time2Wait) that the target waits for a new implicit or explicit
+	 * logout.\n
+	 * If it is the last connection of a session, the whole session state is
+	 * discarded after Time2Retain.\n
+	 * If Time2Retain is 0, the target has already discarded the connection
+	 * (and possibly the session) state along with the task states. No
+	 * reassignment or Logout is required in this case.
+	 */
+	uint16_t time_retain;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint32_t reserved5;
 } iscsi_logout_response_packet;
 
 
-/// Selective Negative / Sequence Number Acknowledgment (SNACK) request: Data/R2T SNACK: requesting retransmission of one or more Data-In or R2T PDUs.
-#define ISCSI_SNACK_REQ_TYPE_DATA_R2T_SNACK 0x00
-
-/// Selective Negative / Sequence Number Acknowledgment (SNACK) request:
-#define ISCSI_SNACK_REQ_TYPE_STATUS_SNACK   0x01 // Status SNACK: requesting retransmission of one or more
-                                                 // numbered responses
-
-/**
- * @brief Selective Negative / Sequence Number Acknowledgment (SNACK) request: DataACK: positively acknowledges Data-In PDUs.
- *
- * If an initiator operates at ErrorRecoveryLevel 1 or higher, it MUST
- * issue a SNACK of type DataACK after receiving a Data-In PDU with the
- * A bit set to 1. However, if the initiator has detected holes in the
- * input sequence, it MUST postpone issuing the SNACK of type DataACK
- * until the holes are filled. An initiator MAY ignore the A bit if it
- * deems that the bit is being set aggressively by the target (i.e.,
- * before the MaxBurstLength limit is reached).\n
- * The DataACK is used to free resources at the target and not to
- * request or imply data retransmission.\n
- * An initiator MUST NOT request retransmission for any data it had
- * already acknowledged
- */
-#define ISCSI_SNACK_REQ_TYPE_DATA_ACK       0x02
-
-/**
- * @brief Selective Negative / Sequence Number Acknowledgment (SNACK) request: R-Data SNACK: requesting retransmission of Data-In PDUs with possible resegmentation and status tagging.
- *
- * If the initiator MaxRecvDataSegmentLength changed between the
- * original transmission and the time the initiator requests
- * retransmission, the initiator MUST issue a R-Data SNACK.\n
- * With R-Data SNACK, the initiator indicates that it discards all the
- * unacknowledged data and expects the target to resend it. It also
- * expects resegmentation. In this case, the retransmitted Data-In PDUs
- * MAY be different from the ones originally sent in order to reflect
- * changes in MaxRecvDataSegmentLength. Their DataSN starts with the
- * BegRun of the last DataACK received by the target if any was received;
- * otherwise, it starts with 0 and is increased by 1 for each resent
- * Data-In PDU.\n
- * A target that has received a R-Data SNACK MUST return a SCSI Response
- * that contains a copy of the SNACK Tag field from the R-Data SNACK in
- * the SCSI Response SNACK Tag field as its last or only Response. For
- * example, if it has already sent a response containing another value
- * in the SNACK Tag field or had the status included in the last Data-In
- * PDU, it must send a new SCSI Response PDU. If a target sends more
- * than one SCSI Response PDU due to this rule, all SCSI Response PDUs
- * must carry the same StatSN. If an initiator attempts to recover a lost
- * SCSI Response when more than one response has been sent, the
- * target will send the SCSI Response with the latest content known to
- * the target, including the last SNACK Tag for the command.\n
- * For considerations in allegiance reassignment of a task to a
- * connection with a different MaxRecvDataSegmentLength.
- */
-#define ISCSI_SNACK_REQ_TYPE_R_DATA_SNACK   0x03
-
-
-/**
- * @brief iSCSI SNACK Request packet data.
- *
- * If the implementation supports ErrorRecoveryLevel greater than zero,
- * it MUST support all SNACK types.
- *
- * The SNACK is used by the initiator to request the retransmission of
- * numbered responses, data, or R2T PDUs from the target. The SNACK
- * Request indicates the numbered responses or data "runs" whose
- * retransmission is requested, where the run starts with the first
- * StatSN, DataSN, or R2TSN whose retransmission is requested and
- * indicates the number of Status, Data, or R2T PDUs requested,
- * including the first. 0 has special meaning when used as a starting
- * number and length:
- *
- *    - When used in RunLength, it means all PDUs starting with the
- *      initial.
- *
- *    - When used in both BegRun and RunLength, it means all
- *      unacknowledged PDUs.
- *
- * The numbered response(s) or R2T(s) requested by a SNACK MUST be
- * delivered as exact replicas of the ones that the target transmitted
- * originally, except for the fields ExpCmdSN, MaxCmdSN, and ExpDataSN,
- * which MUST carry the current values. R2T(s)requested by SNACK MUST
- * also carry the current value of the StatSN.
- *
- * The numbered Data-In PDUs requested by a Data SNACK MUST be delivered
- * as exact replicas of the ones that the target transmitted originally,
- * except for the fields ExpCmdSN and MaxCmdSN, which MUST carry the
- * current values; and except for resegmentation.
- *
- * Any SNACK that requests a numbered response, data, or R2T that was
- * not sent by the target or was already acknowledged by the initiator
- * MUST be rejected with a reason code of "Protocol Error".
- */
-typedef struct __attribute__((packed)) iscsi_snack_req_packet {
-    /// Always 0x10 according to iSCSI specification.
-    uint8_t opcode;
-
-    /**
-     * @brief Type.
-     *
-     * Data/R2T SNACK, Status SNACK, or R-Data SNACK for a command MUST
-     * precede status acknowledgment for the given command.
-     */
-    int8_t type;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint16_t reserved;
-
-    /// TotalAHSLength.
-    uint8_t total_ahs_len;
-
-    /// DataSegmentLength.
-    uint8_t ds_len[3];
-
-    /// LUN or Reserved.
-    uint64_t lun;
-
-    /**
-     * @brief Initiator Task Tag (ITT).
-     *
-     * For a Status SNACK and DataACK, the Initiator Task Tag MUST be set to
-     * the reserved value 0xFFFFFFFF. In all other cases, the Initiator
-     * Task Tag field MUST be set to the Initiator Task Tag of the
-     * referenced command.
-     */
-    uint32_t init_task_tag;
-
-    /**
-     * @brief Target Transfer Tag (TTT).
-     *
-     * For a R-Data SNACK, this field MUST contain a value that is different
-     * from 0 or 0xFFFFFFFF and is unique for the task (identified by the
-     * Initiator Task Tag). This value MUST be copied by the iSCSI target
-     * in the last or only SCSI Response PDU it issues for the command.\n
-     * For DataACK, the Target Transfer Tag MUST contain a copy of the
-     * Target Transfer Tag and LUN provided with the SCSI Data-In PDU with
-     * the A bit set to 1.\n
-     * In all other cases, the Target Transfer Tag field MUST be set to the
-     * reserved value 0xFFFFFFFF.
-     */
-    uint32_t target_xfer_snack_tag;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint32_t reserved2;
-
-    /// ExpStatSN.
-    uint32_t exp_stat_sn;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint32_t reserved3;
-
-    /**
-     * @brief BegRun.
-     *
-     * This field indicates the DataSN, R2TSN, or StatSN of the first PDU
-     * whose retransmission is requested (Data/R2T and Status SNACK), or the
-     * next expected DataSN (DataACK SNACK).\n
-     * A BegRun of 0, when used in conjunction with a RunLength of 0, means
-     * "resend all unacknowledged Data-In, R2T or Response PDUs".
-     * BegRun MUST be 0 for a R-Data SNACK.
-     */
-    uint32_t beg_run;
-
-    /**
-     * @brief RunLength.
-     *
-     * This field indicates the number of PDUs whose retransmission is
-     * requested.\n
-     * A RunLength of 0 signals that all Data-In, R2T, or Response PDUs
-     * carrying the numbers equal to or greater than BegRun have to be
-     * resent.\n
-     * The RunLength MUST also be 0 for a DataACK SNACK in addition to a
-     * R-Data SNACK.
-     */
-    uint32_t run_len;
-
-    /// Optional header digest.
-    iscsi_header_digest hdr_digest;
-} iscsi_snack_req_packet;
-
-
 /// iSCSI Reject packet data: Reserved, original PDU can't be resent.
 #define ISCSI_REJECT_REASON_RESERVED                    0x01
 
@@ -9437,100 +5171,91 @@ typedef struct __attribute__((packed)) iscsi_snack_req_packet {
  * packet was rejected or has been rejected for some reason.
  */
 typedef struct __attribute__((packed)) iscsi_reject_packet {
-    /// Always 0x3F according to iSCSI specification.
-    uint8_t opcode;
-
-    /// Reserved for future usage (always MUST be 0x80 for now).
-    int8_t flags;
-
-    /**
-     * @brief Reject reason.
-     *
-     * In all the cases in which a pre-instantiated SCSI task is terminated
-     * because of the reject, the target MUST issue a proper SCSI command
-     * response with CHECK CONDITION. In these cases in which a status for
-     * the SCSI task was already sent before the reject, no additional
-     * status is required. If the error is detected while data from the
-     * initiator is still expected (i.e., the command PDU did not contain
-     * all the data and the target has not received a Data-Out PDU with the
-     * Final bit set to 1 for the unsolicited data, if any, and all
-     * outstanding R2Ts, if any), the target MUST wait until it receives
-     * the last expected Data-Out PDUs with the F bit set to 1 before
-     * sending the Response PDU.
-     */
-    uint8_t reason;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint8_t reserved;
-
-    /// TotalAHSLength.
-    uint8_t total_ahs_len;
-
-    /// DataSegmentLength.
-    uint8_t ds_len[3];
-
-    /// Reserved for future usage, always MUST be 0.
-    uint64_t reserved2;
-
-    /// Always 0xFFFFFFFF for now.
-    uint32_t tag;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint32_t reserved3;
-
-    /**
-     * @brief StatSN.
-     *
-     * This field carries its usual value and is not related to the
-     * rejected command. The StatSN is advanced after a Reject.
-     */
-    uint32_t stat_sn;
-
-    /**
-     * @brief ExpCmdSN.
-     *
-     * This field carries its usual value and is not related to the
-     * rejected command.
-     */
-    uint32_t exp_cmd_sn;
-
-    /**
-     * @brief MaxCmdSN.
-     *
-     * This field carries its usual value and is not related to the
-     * rejected command.
-     */
-    uint32_t max_cmd_sn;
-
-    /**
-     * @brief DataSN / Ready To Transfer Sequence Number (R2TSN) or Reserved.
-     *
-     * This field is only valid if the rejected PDU is a Data/R2T SNACK and
-     * the Reject reason code is "Protocol Error". The DataSN/R2TSN is the
-     * next Data/R2T sequence number that the target would send for the
-     * task, if any.
-     */
-    uint32_t data_r2t_sn;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint64_t reserved4;
-
-    /// Optional header digest.
-    iscsi_header_digest hdr_digest;
-
-    /**
-     * @brief Complete Header of Bad PDU.
-     *
-     * The target returns the header (not including the digest) of the
-     * PDU in error as the data of the response.
-     */
-    iscsi_bhs_packet bad_pdu_hdr;
-
-    /// Vendor-specific data (if any).
-    uint8_t vendor_data[0];
-
-    /// Optional data digest.
-    iscsi_data_digest data_digest;
+	/// Always 0x3F according to iSCSI specification.
+	uint8_t opcode;
+
+	/// Reserved for future usage (must be always 0x80 for now).
+	int8_t flags;
+
+	/**
+	 * @brief Reject reason.
+	 *
+	 * In all the cases in which a pre-instantiated SCSI task is terminated
+	 * because of the reject, the target MUST issue a proper SCSI command
+	 * response with CHECK CONDITION. In these cases in which a status for
+	 * the SCSI task was already sent before the reject, no additional
+	 * status is required. If the error is detected while data from the
+	 * initiator is still expected (i.e., the command PDU did not contain
+	 * all the data and the target has not received a Data-Out PDU with the
+	 * Final bit set to 1 for the unsolicited data, if any, and all
+	 * outstanding R2Ts, if any), the target MUST wait until it receives
+	 * the last expected Data-Out PDUs with the F bit set to 1 before
+	 * sending the Response PDU.
+	 */
+	uint8_t reason;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint8_t reserved;
+
+	/// TotalAHSLength.
+	uint8_t total_ahs_len;
+
+	/// DataSegmentLength.
+	uint8_t ds_len[3];
+
+	/// Reserved for future usage, always MUST be 0.
+	uint64_t reserved2;
+
+	/// Always 0xFFFFFFFF for now.
+	uint32_t tag;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint32_t reserved3;
+
+	/**
+	 * @brief StatSN.
+	 *
+	 * This field carries its usual value and is not related to the
+	 * rejected command. The StatSN is advanced after a Reject.
+	 */
+	uint32_t stat_sn;
+
+	/**
+	 * @brief ExpCmdSN.
+	 *
+	 * This field carries its usual value and is not related to the
+	 * rejected command.
+	 */
+	uint32_t exp_cmd_sn;
+
+	/**
+	 * @brief MaxCmdSN.
+	 *
+	 * This field carries its usual value and is not related to the
+	 * rejected command.
+	 */
+	uint32_t max_cmd_sn;
+
+	/**
+	 * @brief DataSN / Ready To Transfer Sequence Number (R2TSN) or Reserved.
+	 *
+	 * This field is only valid if the rejected PDU is a Data/R2T SNACK and
+	 * the Reject reason code is "Protocol Error". The DataSN/R2TSN is the
+	 * next Data/R2T sequence number that the target would send for the
+	 * task, if any.
+	 */
+	uint32_t data_r2t_sn;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint64_t reserved4;
+
+	/**
+	 * @brief Complete Header of Bad PDU.
+	 *
+	 * The target returns the header (not including the digest) of the
+	 * PDU in error as the data of the response.
+	 */
+	iscsi_bhs_packet bad_pdu_hdr;
 } iscsi_reject_packet;
 
 /**
@@ -9555,76 +5280,76 @@ typedef struct __attribute__((packed)) iscsi_reject_packet {
  * in response to each other.
  */
 typedef struct __attribute__((packed)) iscsi_nop_out_packet {
-    /// Always 0x00 according to iSCSI specification.
-    uint8_t opcode;
-
-    /// Reserved for future usage (always MUST be 0x80 for now).
-    int8_t flags;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint16_t reserved;
-
-    /// TotalAHSLength.
-    uint8_t total_ahs_len;
-
-    /// DataSegmentLength.
-    uint8_t ds_len[3];
-
-    /// LUN or Reserved.
-    uint64_t lun;
-
-    /**
-     * @brief Initiator Task Tag (ITT).
-     *
-     * The NOP-Out MUST have the Initiator Task Tag set to a valid value
-     * only if a response in the form of a NOP-In is requested (i.e., the
-     * NOP-Out is used as a ping request). Otherwise, the Initiator Task
-     * Tag MUST be set to 0xFFFFFFFF.\n
-     * When a target receives the NOP-Out with a valid Initiator Task Tag,
-     * it MUST respond with a NOP-In Response.\n
-     * If the Initiator Task Tag contains 0xFFFFFFFF, the I bit MUST be set
-     * to 1, and the CmdSN is not advanced after this PDU is sent.
-     */
-    uint32_t init_task_tag;
-
-    /**
-     * @brief Target Transfer Tag (TTT).
-     *
-     * The Target Transfer Tag is a target-assigned identifier for the
-     * operation.\n
-     * The NOP-Out MUST only have the Target Transfer Tag set if it is
-     * issued in response to a NOP-In with a valid Target Transfer Tag. In
-     * this case, it copies the Target Transfer Tag from the NOP-In PDU.\n
-     * Otherwise, the Target Transfer Tag MUST be set to 0xFFFFFFFF.\n
-     * When the Target Transfer Tag is set to a value other than 0xFFFFFFFF,
-     * the LUN field MUST also be copied from the NOP-In.
-     */
-    uint32_t target_xfer_tag;
-
-    /// CmdSN.
-    uint32_t cmd_sn;
-
-    /// ExpStatSN.
-    uint32_t exp_stat_sn;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint64_t reserved2[2];
-
-    /// Optional header digest.
-    iscsi_header_digest hdr_digest;
-
-    /**
-     * @brief DataSegment - Ping Data (optional).
-     *
-     * Ping data is reflected in the NOP-In Response. The length of the
-     * reflected data is limited to MaxRecvDataSegmentLength. The length of
-     * ping data is indicated by the DataSegmentLength. 0 is a valid value
-     * for the DataSegmentLength and indicates the absence of ping data.
-     */
-    iscsi_scsi_ds_cmd_data ds_ping_data;
-
-    /// Optional data digest.
-    iscsi_data_digest data_digest;
+	/// Always 0x00 according to iSCSI specification.
+	uint8_t opcode;
+
+	/// Reserved for future usage (must be always 0x80 for now).
+	int8_t flags;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint16_t reserved;
+
+	/// TotalAHSLength.
+	uint8_t total_ahs_len;
+
+	/// DataSegmentLength.
+	uint8_t ds_len[3];
+
+	/// LUN or Reserved.
+	uint64_t lun;
+
+	/**
+	 * @brief Initiator Task Tag (ITT).
+	 *
+	 * The NOP-Out MUST have the Initiator Task Tag set to a valid value
+	 * only if a response in the form of a NOP-In is requested (i.e., the
+	 * NOP-Out is used as a ping request). Otherwise, the Initiator Task
+	 * Tag MUST be set to 0xFFFFFFFF.\n
+	 * When a target receives the NOP-Out with a valid Initiator Task Tag,
+	 * it MUST respond with a NOP-In Response.\n
+	 * If the Initiator Task Tag contains 0xFFFFFFFF, the I bit MUST be set
+	 * to 1, and the CmdSN is not advanced after this PDU is sent.
+	 */
+	uint32_t init_task_tag;
+
+	/**
+	 * @brief Target Transfer Tag (TTT).
+	 *
+	 * The Target Transfer Tag is a target-assigned identifier for the
+	 * operation.\n
+	 * The NOP-Out MUST only have the Target Transfer Tag set if it is
+	 * issued in response to a NOP-In with a valid Target Transfer Tag. In
+	 * this case, it copies the Target Transfer Tag from the NOP-In PDU.\n
+	 * Otherwise, the Target Transfer Tag MUST be set to 0xFFFFFFFF.\n
+	 * When the Target Transfer Tag is set to a value other than 0xFFFFFFFF,
+	 * the LUN field MUST also be copied from the NOP-In.
+	 */
+	uint32_t target_xfer_tag;
+
+	/// CmdSN.
+	uint32_t cmd_sn;
+
+	/// ExpStatSN.
+	uint32_t exp_stat_sn;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint64_t reserved2[2];
+
+	/// Optional header digest.
+	uint32_t hdr_digest;
+
+	/**
+	 * @brief DataSegment - Ping Data (optional).
+	 *
+	 * Ping data is reflected in the NOP-In Response. The length of the
+	 * reflected data is limited to MaxRecvDataSegmentLength. The length of
+	 * ping data is indicated by the DataSegmentLength. 0 is a valid value
+	 * for the DataSegmentLength and indicates the absence of ping data.
+	 */
+	iscsi_scsi_ds_cmd_data ds_ping_data;
+
+	/// Optional data digest.
+	uint32_t data_digest;
 } iscsi_nop_out_packet;
 
 
@@ -9653,70 +5378,70 @@ typedef struct __attribute__((packed)) iscsi_nop_out_packet {
  * (DataSegmentLength MUST be 0).
  */
 typedef struct __attribute__((packed)) iscsi_nop_in_packet {
-    /// Always 0x20 according to iSCSI specification.
-    uint8_t opcode;
-
-    /// Reserved for future usage (always MUST be 0x80 for now).
-    int8_t flags;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint16_t reserved;
-
-    /// TotalAHSLength
-    uint8_t total_ahs_len;
-
-    /// DataSegmentLength.
-    uint8_t ds_len[3];
-
-    /// A LUN MUST be set to a correct value when the Target Transfer Tag is valid (not the reserved value 0xFFFFFFFF).
-    uint64_t lun;
-
-    /// Initiator Task Tag (ITT) or 0xFFFFFFFF.
-    uint32_t init_task_tag;
-
-    /**
-     * @brief Target Transfer Tag (TTT).
-     *
-     * If the target is responding to a NOP-Out, this field is set to the
-     * reserved value 0xFFFFFFFF.\n
-     * If the target is sending a NOP-In as a ping (intending to receive a
-     * corresponding NOP-Out), this field is set to a valid value (not the
-     * reserved value 0xFFFFFFFF).\n
-     * If the target is initiating a NOP-In without wanting to receive a
-     * corresponding NOP-Out, this field MUST hold the reserved value
-     * 0xFFFFFFFF.
-     */
-    uint32_t target_xfer_tag;
-
-    /**
-     * @brief StatSN.
-     *
-     * The StatSN field will always contain the next StatSN. However, when
-     * the Initiator Task Tag is set to 0xFFFFFFFF, the StatSN for the
-     * connection is not advanced after this PDU is sent.
-     */
-    uint32_t stat_sn;
-
-    /// ExpCmdSN.
-    uint32_t exp_cmd_sn;
-
-    /// MaxCmdSN.
-    uint32_t max_cmd_sn;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint32_t reserved2;
-
-    /// Reserved for future usage, always MUST be 0.
-    uint64_t reserved3;
-
-    /// Optional header digest.
-    iscsi_header_digest hdr_digest;
-
-    /// DataSegment - Return Ping Data.
-    iscsi_scsi_ds_cmd_data ds_ping_data;
-
-    /// Optional data digest.
-    iscsi_data_digest data_digest;
+	/// Always 0x20 according to iSCSI specification.
+	uint8_t opcode;
+
+	/// Reserved for future usage (must be always 0x80 for now).
+	int8_t flags;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint16_t reserved;
+
+	/// TotalAHSLength
+	uint8_t total_ahs_len;
+
+	/// DataSegmentLength.
+	uint8_t ds_len[3];
+
+	/// A LUN MUST be set to a correct value when the Target Transfer Tag is valid (not the reserved value 0xFFFFFFFF).
+	uint64_t lun;
+
+	/// Initiator Task Tag (ITT) or 0xFFFFFFFF.
+	uint32_t init_task_tag;
+
+	/**
+	 * @brief Target Transfer Tag (TTT).
+	 *
+	 * If the target is responding to a NOP-Out, this field is set to the
+	 * reserved value 0xFFFFFFFF.\n
+	 * If the target is sending a NOP-In as a ping (intending to receive a
+	 * corresponding NOP-Out), this field is set to a valid value (not the
+	 * reserved value 0xFFFFFFFF).\n
+	 * If the target is initiating a NOP-In without wanting to receive a
+	 * corresponding NOP-Out, this field MUST hold the reserved value
+	 * 0xFFFFFFFF.
+	 */
+	uint32_t target_xfer_tag;
+
+	/**
+	 * @brief StatSN.
+	 *
+	 * The StatSN field will always contain the next StatSN. However, when
+	 * the Initiator Task Tag is set to 0xFFFFFFFF, the StatSN for the
+	 * connection is not advanced after this PDU is sent.
+	 */
+	uint32_t stat_sn;
+
+	/// ExpCmdSN.
+	uint32_t exp_cmd_sn; // ExpCmdSN
+
+	/// MaxCmdSN.
+	uint32_t max_cmd_sn;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint32_t reserved2;
+
+	/// Reserved for future usage, always MUST be 0.
+	uint64_t reserved3;
+
+	/// Optional header digest.
+	uint32_t hdr_digest;
+
+	/// DataSegment - Return Ping Data.
+	iscsi_scsi_ds_cmd_data ds_ping_data;
+
+	/// Optional data digest.
+	uint32_t data_digest;
 } iscsi_nop_in_packet;
 
 
@@ -9764,17 +5489,17 @@ typedef struct __attribute__((packed)) iscsi_nop_in_packet {
  * identifier data.
  */
 typedef struct __attribute__((packed)) iscsi_transport_id {
-    /// First 4 bits are protocol ID and last 2 bits are format.
-    uint8_t id;
+	/// First 4 bits are protocol ID and last 2 bits are format.
+	uint8_t id;
 
-    /// Reserved for future usage (always MUST be 0).
-    uint8_t reserved;
+	/// Reserved for future usage (always MUST be 0).
+	uint8_t reserved;
 
-    /// Additional length of name.
-    uint16_t add_len;
+	/// Additional length of name.
+	uint16_t add_len;
 
-    /// Name.
-    uint8_t name[0];
+	/// Name.
+	uint8_t name[0];
 } iscsi_transport_id;
 
 
@@ -9854,20 +5579,20 @@ typedef struct __attribute__((packed)) iscsi_transport_id {
  * and the iSCSI connection lookup table.
  */
 typedef struct iscsi_key_value_pair_lut_entry {
-    /// Name of key.
-    const uint8_t *key;
+	/// Name of key.
+	const uint8_t *key;
 
-    /// Default value of the key, always in string representation.
-    uint8_t *value;
+	/// Default value of the key, always in string representation.
+	uint8_t *value;
 
-    /// NUL separated list of allowed string values. If key type is numeric: NUL separated minimum and maximum integer range. End is marked with another NUL.
-    uint8_t *list_range;
+	/// NUL separated list of allowed string values. If key type is numeric: NUL separated minimum and maximum integer range. End is marked with another NUL.
+	uint8_t *list_range;
 
-    /// Type of key and value pair.
-    const int type;
+	/// Type of key and value pair.
+	const int type;
 
-    /// Flags indicating special key attributes.
-    const int flags;
+	/// Flags indicating special key attributes.
+	const int flags;
 } iscsi_key_value_pair_lut_entry;
 
 
@@ -9879,19 +5604,19 @@ typedef struct iscsi_key_value_pair_lut_entry {
  * Text or Login packet data.
  */
 typedef struct iscsi_key_value_pair {
-    /// Value of the key which is stored in the hash map.
+	/// Value of the key which is stored in the hash map.
 	uint8_t *value;
 
-    /// NUL separated list of allowed string values. If key type is numeric: NUL separated minimum and maximum integer range. End is marked with another NUL.
-    uint8_t *list_range;
+	/// NUL separated list of allowed string values. If key type is numeric: NUL separated minimum and maximum integer range. End is marked with another NUL.
+	uint8_t *list_range;
 
-    /// Type of key and value pair.
-    int type;
+	/// Type of key and value pair.
+	int type;
 
-    /// Flags indicating special key attributes.
-    int flags;
+	/// Flags indicating special key attributes.
+	int flags;
 
-    /// State bit mask.
+	/// State bit mask.
 	uint state_mask;
 } iscsi_key_value_pair;
 
@@ -9904,530 +5629,37 @@ typedef struct iscsi_connection iscsi_connection;
  * pairs for sending as DataSegment packet data to the client.
  */
 typedef struct iscsi_key_value_pair_packet {
-    /// Associated iSCSI connection.
-    iscsi_connection *conn;
+	/// Associated iSCSI connection.
+	iscsi_connection *conn;
 
-    /// Current text buffer containing multiple key=value + NUL terminator pairs.
-    uint8_t *buf;
+	/// Current text buffer containing multiple key=value + NUL terminator pairs.
+	uint8_t *buf;
 
-    /// Position of output buffer for next write.
-    uint32_t pos;
+	/// Position of output buffer for next write.
+	uint32_t pos;
 
-    /// Current length of buffer including final NUL terminator without iSCSI zero padding.
-    uint32_t len;
+	/// Current length of buffer including final NUL terminator without iSCSI zero padding.
+	uint32_t len;
 
-    /// Discovery mode.
-    int discovery;
+	/// Discovery mode.
+	int discovery;
 } iscsi_key_value_pair_packet;
 
-int iscsi_parse_key_value_pairs(iscsi_hashmap *key_value_pairs, const uint8_t *packet_data, uint len, int c_bit, uint8_t **partial_pairs); // Extracts all text key / value pairs out of an iSCSI packet into a hash map
-
-
-/// iSCSI main global data: INI configuration filename.
-#define ISCSI_GLOBALS_CONFIG_FILENAME "iscsi.conf"
-
-
-/// iSCSI main global data: iSCSI INI configuration iSCSI section identifier string.
-#define ISCSI_GLOBALS_SECTION_ISCSI              "iscsi"
-
-/// iSCSI main global data: iSCSI INI configuration iSCSI SCSI section identifier string.
-#define ISCSI_GLOBALS_SECTION_SCSI               "scsi"
-
-
-/// iSCSI main global data: iSCSI INI configuration iSCSI section target name check key identifier string.
-#define ISCSI_GLOBALS_SECTION_ISCSI_KEY_TARGET_NAME_CHECK        "TargetNameCheck"
-
-/// iSCSI main global data: iSCSI INI configuration iSCSI section maximum number of sessions allowed key identifier string.
-#define ISCSI_GLOBALS_SECTION_ISCSI_KEY_MAX_SESSIONS             "MaxSessions"
-
-/// iSCSI main global data: iSCSI INI configuration iSCSI section maximum number of connections per session allowed key identifier string.
-#define ISCSI_GLOBALS_SECTION_ISCSI_MAX_CONNECTIONS_PER_SESSIONS "MaxConnectionsPerSession"
-
-
-/// iSCSI main global data: iSCSI INI configuration iSCSI SCSI section device type key identifier string.
-#define ISCSI_GLOBALS_SECTION_SCSI_KEY_DEVICE_TYPE         "DeviceType"
-
-/// iSCSI main global data: iSCSI INI configuration iSCSI SCSI section physical block size key identifier string.
-#define ISCSI_GLOBALS_SECTION_SCSI_KEY_PHYSICAL_BLOCK_SIZE "PhysicalBlockSize"
-
-/// iSCSI main global data: iSCSI INI configuration iSCSI SCSI section logical block size key identifier string.
-#define ISCSI_GLOBALS_SECTION_SCSI_KEY_LOGICAL_BLOCK_SIZE  "LogicalBlockSize"
-
-/// iSCSI main global data: iSCSI INI configuration iSCSI SCSI section removable device key identifier string.
-#define ISCSI_GLOBALS_SECTION_SCSI_KEY_REMOVABLE           "Removable"
-
-/// iSCSI main global data: iSCSI INI configuration iSCSI SCSI section UNMAP support device key identifier string.
-#define ISCSI_GLOBALS_SECTION_SCSI_KEY_UNMAP               "UNMAP"
-
-/// iSCSI main global data: iSCSI INI configuration iSCSI SCSI section no rotation device key identifier string.
-#define ISCSI_GLOBALS_SECTION_SCSI_KEY_NO_ROTATION         "NoRotation"
-
-/// iSCSI main global data: iSCSI INI configuration iSCSI SCSI section physical read only device key identifier string.
-#define ISCSI_GLOBALS_SECTION_SCSI_KEY_PHYSICAL_READ_ONLY  "PhysicalReadOnly"
-
-/// iSCSI main global data: iSCSI INI configuration iSCSI SCSI section write protected device key identifier string.
-#define ISCSI_GLOBALS_SECTION_SCSI_KEY_WRITE_PROTECT       "WriteProtect"
-
-/// iSCSI main global data: iSCSI INI configuration iSCSI SCSI section write cache supported device key identifier string.
-#define ISCSI_GLOBALS_SECTION_SCSI_KEY_WRITE_CACHE         "WriteCache"
-
-
-/// iSCSI main global data: iSCSI SCSI device specific INI configuration section prefix identifier string.
-#define ISCSI_GLOBALS_SECTION_SCSI_DEVICE_PREFIX "scsi-device-"
-
-
-/// iSCSI main global data config type: iHeader digest (CRC32), always MUST be 0 or 4 for now.
-#define ISCSI_GLOBALS_CONFIG_TYPE_HEADER_DIGEST                     0
-
-/// iSCSI main global data config type: Data digest (CRC32), always MUST be 0 or 4 for now.
-#define ISCSI_GLOBALS_CONFIG_TYPE_DATA_DIGEST                       1
-
-/// iSCSI main global data config type: Maximum receive DataSegment length in bytes.
-#define ISCSI_GLOBALS_CONFIG_TYPE_MAX_RECV_DS_LEN                   2
-
-/// iSCSI main global data config type: Maximum number of connections per session.
-#define ISCSI_GLOBALS_CONFIG_TYPE_MAX_SESSION_CONNS                 3
-
-/// iSCSI main global data config type: Ready to transfer maximum outstanding value.
-#define ISCSI_GLOBALS_CONFIG_TYPE_MAX_OUTSTANDING_R2T               4
-
-/// iSCSI main global data config type: Default time to wait.
-#define ISCSI_GLOBALS_CONFIG_TYPE_DEFAULT_TIME_TO_WAIT              5
-
-/// iSCSI main global data config type: Default time to retain.
-#define ISCSI_GLOBALS_CONFIG_TYPE_DEFAULT_TIME_TO_RETAIN            6
-
-/// iSCSI main global data config type: First burst length.
-#define ISCSI_GLOBALS_CONFIG_TYPE_FIRST_BURST_LEN                   7
-
-/// iSCSI main global data config type: Maximum burst length.
-#define ISCSI_GLOBALS_CONFIG_TYPE_MAX_BURST_LEN                     8
-
-/// iSCSI main global data config type: Error recovery level.
-#define ISCSI_GLOBALS_CONFIG_TYPE_ERR_RECOVERY_LEVEL                9
-
-/// iSCSI main global data config type: SCSI emulation for device type.
-#define ISCSI_GLOBALS_CONFIG_TYPE_SCSI_DEVICE_TYPE                 10
-
-/// iSCSI main global data config type: SCSI emulation for physical block size.
-#define ISCSI_GLOBALS_CONFIG_TYPE_SCSI_PHYSICAL_BLOCK_SIZE         11
-
-/// iSCSI main global data config type: SCSI emulation for physical block size shift count.
-#define ISCSI_GLOBALS_CONFIG_TYPE_SCSI_PHYSICAL_BLOCK_SIZE_SHIFT   12
-
-/// iSCSI main global data config type: SCSI emulation for logical block size.
-#define ISCSI_GLOBALS_CONFIG_TYPE_SCSI_LOGICAL_BLOCK_SIZE          13
-
-/// iSCSI main global data config type: SCSI emulation for logical block size shift count.
-#define ISCSI_GLOBALS_CONFIG_TYPE_SCSI_LOGICAL_BLOCK_SIZE_SHIFT    14
-
-/// iSCSI main global data config type: Initial ready to transfer.
-#define ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_INIT_R2T                   15
-
-/// iSCSI main global data config type: Immediate data.
-#define ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_IMMEDIATE_DATA             16
-
-/// iSCSI main global data config type: Data PDU in order.
-#define ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_DATA_PDU_IN_ORDER          17
-
-/// iSCSI main global data config type: Data sequence in order.
-#define ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_DATA_SEQ_IN_ORDER          18
-
-/// iSCSI main global data config type: SCSI emulation for I/O removable device.
-#define ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_REMOVABLE          19
-
-/// iSCSI main global data config type: SCSI emulation for I/O UNMAP supporting device.
-#define ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_UNMAP              20
-
-/// iSCSI main global data config type: SCSI emulation for I/O non-rotating device.
-#define ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_NO_ROTATION        21
-
-/// iSCSI main global data config type: SCSI emulation for I/O physical read only device.
-#define ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_PHYSICAL_READ_ONLY 22
-
-/// iSCSI main global data config type: SCSI emulation for I/O write protected device.
-#define ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_WRITE_PROTECT      23
-
-/// iSCSI main global data config type: SCSI emulation for I/O write cache device.
-#define ISCSI_GLOBALS_CONFIG_TYPE_FLAGS_SCSI_IO_WRITE_CACHE        24
-
-
-/// iSCSI main global data SCSI device configuration flags: Initial ready to transfer.
-#define ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_INIT_R2T                   (1 << 0)
-
-/// iSCSI main global data SCSI device configuration flags: Immediate data.
-#define ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_IMMEDIATE_DATA             (1 << 1)
-
-/// iSCSI main global data SCSI device configuration flags: Data PDU in order.
-#define ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_DATA_PDU_IN_ORDER          (1 << 2)
-
-/// iSCSI main global data SCSI device configuration flags: Data sequence in order.
-#define ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_DATA_SEQ_IN_ORDER          (1 << 3)
-
-/// iSCSI main global data SCSI device configuration flags: SCSI emulation for I/O removable device.
-#define ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_REMOVABLE          (1 << 4)
-
-/// iSCSI main global data SCSI device configuration flags: SCSI emulation for I/O UNMAP supporting device.
-#define ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_UNMAP              (1 << 5)
-
-/// iSCSI main global data SCSI device configuration flags: SCSI emulation for I/O non-rotating device.
-#define ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_NO_ROTATION        (1 << 6)
-
-/// iSCSI main global data SCSI device configuration flags: SCSI emulation for I/O physical read only device.
-#define ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_PHYSICAL_READ_ONLY (1 << 7)
-
-/// iSCSI main global data SCSI device configuration flags: SCSI emulation for I/O write protected device.
-#define ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_WRITE_PROTECT      (1 << 8)
-
-/// iSCSI main global data SCSI device configuration flags: SCSI emulation for I/O write cache device.
-#define ISCSI_GLOBALS_SCSI_DEVICE_CONFIG_FLAGS_SCSI_IO_WRITE_CACHE        (1 << 9)
-
-
-/**
- * @brief iSCSI main global data SCSI device configuration.
- *
- * This structure is used for specific SCSI device
- * configuration which are matched using wildcard
- * patterns which are stored in the hash map key.
- */
-typedef struct iscsi_scsi_device_config {
-    /// SCSI device configuration flags.
-    int flags;
-
-    /// iHeader digest (CRC32), always MUST be 0 or 4 for now.
-	int header_digest;
-
-    /// Data digest (CRC32), always MUST be 0 or 4 for now.
-	int data_digest;
-
-    /// SCSI emulation: Device type.
-    uint scsi_device_type;
-
-    /// Maximum receive DataSegment length in bytes.
-    uint32_t max_recv_ds_len;
-
-    /// Maximum number of connections per session.
-    uint32_t max_session_conns;
-
-    /// Ready to transfer maximum outstanding value.
-    uint32_t max_outstanding_r2t;
-
-    /// Default time to wait.
-    uint32_t default_time_to_wait;
-
-    /// Default time to retain.
-    uint32_t default_time_to_retain;
-
-    /// First burst length.
-    uint32_t first_burst_len;
-
-    /// Maximum burst length.
-    uint32_t max_burst_len;
-
-    /// Error recovery level.
-    uint32_t err_recovery_level;
-
-    /// SCSI emulation: Physical block size.
-    uint32_t scsi_physical_block_size;
-
-    /// SCSI emulation: Physical block size shift count.
-    uint32_t scsi_physical_block_size_shift;
-
-    /// SCSI emulation: Logical block size.
-    uint32_t scsi_logical_block_size;
-
-    /// SCSI emulation: Logical block size shift count.
-    uint32_t scsi_logical_block_size_shift;
-} iscsi_scsi_device_config;
-
-
-/**
- * @brief iSCSI SCSI device configuration search by name.
- *
- * This structure is used by iterating through
- * all iSCSI SCSI device configurations and
- * uses wildcard matching in order to retrieve
- * the correct SCSI configuration for a
- * specified device name.
- */
-typedef struct iscsi_scsi_device_config_find {
-    /// Found iSCSI SCSI device configuration is stored here, should be initialized to NULL.
-    iscsi_scsi_device_config *scsi_device_config;
-
-    /// The name to be searched for is stored here.
-    uint8_t *name;
-} iscsi_scsi_device_config_find;
-
-
 /// iSCSI main global data flags: Allow duplicate ISIDs.
-#define ISCSI_GLOBALS_FLAGS_ISID_ALLOW_DUPLICATES      (1 << 0)
+#define ISCSI_GLOBALS_FLAGS_ISID_ALLOW_DUPLICATES (1 << 0)
 
 /// iSCSI main global data flags: CHAP authentication is disabled.
-#define ISCSI_GLOBALS_FLAGS_CHAP_DISABLE               (1 << 1)
+#define ISCSI_GLOBALS_FLAGS_CHAP_DISABLE          (1 << 1)
 
 /// iSCSI main global data flags: CHAP authentication is required.
-#define ISCSI_GLOBALS_FLAGS_CHAP_REQUIRE               (1 << 2)
+#define ISCSI_GLOBALS_FLAGS_CHAP_REQUIRE          (1 << 2)
 
 /// iSCSI main global data flags: CHAP authentication is mutual.
-#define ISCSI_GLOBALS_FLAGS_CHAP_MUTUAL                (1 << 3)
-
-/// iSCSI main global data flags: Initial ready to transfer.
-#define ISCSI_GLOBALS_FLAGS_INIT_R2T                   (1 << 4)
-
-/// iSCSI main global data flags: Immediate data.
-#define ISCSI_GLOBALS_FLAGS_IMMEDIATE_DATA             (1 << 5)
-
-/// iSCSI main global data flags: Data PDU in order.
-#define ISCSI_GLOBALS_FLAGS_DATA_PDU_IN_ORDER          (1 << 6)
-
-/// iSCSI main global data flags: Data sequence in order.
-#define ISCSI_GLOBALS_FLAGS_DATA_SEQ_IN_ORDER          (1 << 7)
-
-/// iSCSI main global data flags: SCSI emulation for I/O removable device.
-#define ISCSI_GLOBALS_FLAGS_SCSI_IO_REMOVABLE          (1 << 8)
-
-/// iSCSI main global data flags: SCSI emulation for I/O UNMAP supporting device.
-#define ISCSI_GLOBALS_FLAGS_SCSI_IO_UNMAP              (1 << 9)
-
-/// iSCSI main global data flags: SCSI emulation for I/O non-rotating device.
-#define ISCSI_GLOBALS_FLAGS_SCSI_IO_NO_ROTATION        (1 << 10)
-
-/// iSCSI main global data flags: SCSI emulation for I/O physical read only device.
-#define ISCSI_GLOBALS_FLAGS_SCSI_IO_PHYSICAL_READ_ONLY (1 << 11)
-
-/// iSCSI main global data flags: SCSI emulation for I/O write protected device.
-#define ISCSI_GLOBALS_FLAGS_SCSI_IO_WRITE_PROTECT      (1 << 12)
-
-/// iSCSI main global data flags: SCSI emulation for I/O write cache device.
-#define ISCSI_GLOBALS_FLAGS_SCSI_IO_WRITE_CACHE        (1 << 13)
-
-
-/// iSCSI main global data target name validation check level: None, allow everything.
-#define ISCSI_GLOBALS_TARGET_NAME_CHECK_NONE    0
-
-/// iSCSI main global data target name validation check level: Relaxed, check for maximum target name length and if target name starts with 'iqn.', 'naa.' or 'eui.' also check if target name only contains allowed characters.
-#define ISCSI_GLOBALS_TARGET_NAME_CHECK_RELAXED 1
-
-/// iSCSI main global data target name validation check level: Full, check for maximum target name length and always check target name only contains allowed characters.
-#define ISCSI_GLOBALS_TARGET_NAME_CHECK_FULL    2
-
-
-/// iSCSI main global data: Default maximum number of connections.
-#define ISCSI_GLOBALS_DEFAULT_MAX_CONNECTIONS     1UL
-
-/// iSCSI main global data: Default maximum number of outstanding ready to transfers.
-#define ISCSI_GLOBALS_DEFAULT_MAX_OUTSTANDING_R2T 1UL
-
-/// iSCSI main global data: Default time to wait in seconds.
-#define ISCSI_GLOBALS_DEFAULT_TIME_TO_WAIT        2UL
-
-/// iSCSI main global data: Default time to retain in seconds.
-#define ISCSI_GLOBALS_DEFAULT_TIME_TO_RETAIN      20UL
-
-/// iSCSI main global data: First burst length in bytes.
-#define ISCSI_GLOBALS_DEFAULT_FIRST_BURST_LEN     ISCSI_DEFAULT_RECV_DS_LEN
-
-/// iSCSI main global data: Maximum burst length in bytes.
-#define ISCSI_GLOBALS_DEFAULT_MAX_BURST_LEN       (ISCSI_DEFAULT_MAX_RECV_DS_LEN * ISCSI_DEFAULT_MAX_DATA_OUT_PER_CONNECTION)
+#define ISCSI_GLOBALS_FLAGS_CHAP_MUTUAL           (1 << 3)
 
-/// iSCSI main global data: Default error recovery level.
-#define ISCSI_GLOBALS_DEFAULT_ERR_RECOVERY_LEVEL  0UL
-
-
-/**
- * @brief This is the main global iSCSI structure which manages all global data.
- *
- * All iSCSI portal groups, target nodes, sessions and
- * connections are stored here for global access.
- */
-typedef struct iscsi_globals {
-    /// Hash map containing all iSCSI devices.
-    iscsi_hashmap *devices;
-
-    /// Read/write lock for hash map containing all iSCSI devices. MUST be initialized with iscsi_create before any iSCSI functions are used.
-    pthread_rwlock_t devices_rwlock;
-
-    /// Hash map containing all registered iSCSI portal groups.
-    iscsi_hashmap *portal_groups;
-
-    /// Read/write lock for hash map containing all iSCSI portal_groups. MUST be initialized with iscsi_create before any iSCSI functions are used.
-    pthread_rwlock_t portal_groups_rwlock;
-
-    /// iSCSI target nodes.
-    iscsi_hashmap *target_nodes;
-
-    /// Read/write lock for hash map containing all iSCSI target nodes. MUST be initialized with iscsi_create before any iSCSI functions are used.
-    pthread_rwlock_t target_nodes_rwlock;
-
-    /// Hash map containing all iSCSI sessions.
-    iscsi_hashmap *sessions;
-
-    /// Read/write lock for hash map containing all iSCSI sessions. MUST be initialized with iscsi_create before any iSCSI functions are used.
-    pthread_rwlock_t sessions_rwlock;
-
-    /// Hash map containing session key and value pair types and allowed values or ranges.
-    iscsi_hashmap *session_key_value_pairs;
-
-    /// Hash map containing connection key and value pair types and allowed values or ranges.
-    iscsi_hashmap *connection_key_value_pairs;
-
-    /// Hash map containing iSCSI SCSI device specific configuration.
-    iscsi_hashmap *scsi_device_config;
-
-    /// Mutex for hash map containing iSCSI SCSI device specific configuration.
-    pthread_mutex_t scsi_device_config_mutex;
-
-    /// Global flags.
-    int flags;
-
-    /// Target name validation check level.
-    int target_name_check;
-
-    /// Maximum number of allowed sessions.
-    uint max_sessions;
-
-    /// iHeader digest (CRC32), always MUST be 0 or 4 for now.
-	int header_digest;
-
-    /// Data digest (CRC32), always MUST be 0 or 4 for now.
-	int data_digest;
-
-    /// SCSI emulation: Device type.
-    uint scsi_device_type;
-
-    /// Maximum receive DataSegment length in bytes.
-    uint32_t max_recv_ds_len;
-
-    /// Maximum number of connections per session.
-    uint32_t max_session_conns;
-
-    /// Ready to transfer maximum outstanding value.
-    uint32_t max_outstanding_r2t;
-
-    /// Default time to wait.
-    uint32_t default_time_to_wait;
-
-    /// Default time to retain.
-    uint32_t default_time_to_retain;
-
-    /// First burst length.
-    uint32_t first_burst_len;
-
-    /// Maximum burst length.
-    uint32_t max_burst_len;
-
-    /// Error recovery level.
-    uint32_t err_recovery_level;
-
-    /// CHAP group id.
-    int32_t chap_group;
-
-    /// SCSI emulation: Physical block size.
-    uint32_t scsi_physical_block_size;
-
-    /// SCSI emulation: Physical block size shift count.
-    uint32_t scsi_physical_block_size_shift;
-
-    /// SCSI emulation: Logical block size.
-    uint32_t scsi_logical_block_size;
-
-    /// SCSI emulation: Logical block size shift count.
-    uint32_t scsi_logical_block_size_shift;
-} iscsi_globals;
-
-
-/// Reference to iSCSI global vector. MUST be initialized with iscsi_create before any iSCSI functions are used.
-extern iscsi_globals *iscsi_globvec;
 
 /// Read/write lock for iSCSI global vector. MUST be initialized with iscsi_create before any iSCSI functions are used.
-extern pthread_rwlock_t iscsi_globvec_rwlock;
-
-
-int iscsi_create(); // Allocates and initializes the iSCSI global vector structure
-void iscsi_destroy(); // Deallocates all resources acquired by iscsi_create
-
-int iscsi_config_load(iscsi_globals *globvec); // Loads iSCSI server configuration from INI file
-int iscsi_config_get_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data); // Finds an iSCSI SCSI device configuration by name using pattern matching
-int32_t iscsi_config_get(uint8_t *name, const int type); // Retrieves a configuration value either from the iSCSI global vector or for a specified SCSI device name
-
-
-/**
- * @brief iSCSI portal group: Private portal group if set, public otherwise.
- *
- * When redirecting logins, there are two portal group types: public and
- * private.\n
- * Public portal groups return their portals during discovery session.
- * A redirection private portal may also be specified for non-discovery
- * logins.\n
- * Private portal groups instead do not return their portals during
- * the discovery session.
- */
-#define ISCSI_PORTAL_GROUP_PRIVATE      (1 << 0)
-
-/// iSCSI portal group: CHAP authentication is disabled.
-#define ISCSI_PORTAL_GROUP_CHAP_DISABLE (1 << 1)
-
-/// iSCSI portal group: CHAP authentication is required.
-#define ISCSI_PORTAL_GROUP_CHAP_REQUIRE (1 << 2)
-
-/// iSCSI portal group: CHAP authentication is mutual.
-#define ISCSI_PORTAL_GROUP_CHAP_MUTUAL  (1 << 3)
-
-
-/**
- * @brief iSCSI portal group.
- *
- * Portal groups are either public or private and also are used
- * by CHAP authentication.
- */
-typedef struct iscsi_portal_group {
-    /// Hash map containing all portals associated with this iSCSI group.
-    iscsi_hashmap *portals;
-
-    /// Tag value for this portal group.
-    uint64_t tag;
-
-    /// Reference count.
-    int ref_count;
-
-    /// Portal group flags.
-    int flags;
-
-    /// CHAP group id.
-    int32_t chap_group;
-} iscsi_portal_group;
-
-
-/**
- * @brief iSCSI portal.
- *
- * iSCSI portals manage the host / IP address and port, as well
- * as the associated connections.
- */
-typedef struct iscsi_portal {
-    /// Group this portal belongs to.
-	iscsi_portal_group *group;
-
-    /// Hostname / IP address of the portal.
-    uint8_t *host;
-
-    /// Port of the portal.
-    uint8_t *port;
-
-    /// TCP/IP socket for the portal.
-    int sock;
-} iscsi_portal;
-
-
-iscsi_portal_group *iscsi_portal_group_create(const uint64_t tag, const int flags); // Creates and initializes an iSCSI portal group
-int iscsi_portal_group_destroy_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data); // iSCSI portal group destructor callback for hash map
-void iscsi_portal_group_destroy(iscsi_portal_group *portal_group); // Deallocates resources acquired by iscsi_portal_group_create
-int iscsi_portal_group_add_portal(iscsi_portal_group *portal_group, iscsi_portal *portal); // Adds an iSCSI portal to the iSCSI portal group hash map
-void iscsi_portal_group_del_portal(iscsi_portal_group *portal_group, iscsi_portal *portal); // Removes an iSCSI portal from the iSCSI portal group hash map
-
-iscsi_portal *iscsi_portal_create(const uint8_t *host, const uint8_t *port); // Allocates and initializes an iSCSI portal structure
-int iscsi_portal_destroy_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data); // iSCSI portal destructor callback for hash map
-void iscsi_portal_destroy(iscsi_portal *portal);
+//extern pthread_rwlock_t iscsi_globvec_rwlock;
 
 
 /// iSCSI SCSI status code: Good.
@@ -10602,41 +5834,6 @@ void iscsi_portal_destroy(iscsi_portal *portal);
 #define ISCSI_SCSI_ASCQ_CAPACITY_DATA_HAS_CHANGED        0x09
 
 
-typedef struct iscsi_port iscsi_port;
-
-
-/**
- * @brief iSCSI SCSI Persistent Reservation (PR) registrant with I_T nexus.
- *
- * I_T nexus is a nexus which exists between an initiator and a
- * target.
- */
-typedef struct iscsi_scsi_pr_registrant {
-    /// Target iSCSI port.
-    iscsi_port *target_port;
-
-    /// Target iSCSI port name.
-    uint8_t *target_name;
-
-    /// Initiator iSCSI port.
-    iscsi_port *init_port;
-
-    /// Initiator iSCSI port name.
-    uint8_t *init_name;
-
-    /// Transport ID.
-    iscsi_transport_id *transport_id;
-
-    /// Reservation key.
-    uint64_t r_key;
-
-    /// Relative target port identifier.
-    uint16_t rel_target_port_id;
-
-    /// Transport ID length.
-    uint16_t transport_id_len;
-} iscsi_scsi_pr_registrant;
-
 
 /// iSCSI SCSI Persistent Reservation (PR) reservation type: Write exclusive.
 #define ISCSI_SCSI_PR_RESERVATION_TYPE_WRITE_EXCLUSIVE            0x01
@@ -10661,47 +5858,6 @@ typedef struct iscsi_scsi_pr_registrant {
 #define ISCSI_SCSI_PR_RESERVATION_FLAGS_SPC2_RESERVE (1L << 0L)
 
 
-/**
- * @brief iSCSI SCSI Persistent Reservation (PR) reservation with LU_SCOPE.
- *
- * LU_SCOPE means that Persistent Reservation (PR) scope
- * applies to the full logical unit.
- */
-typedef struct iscsi_scsi_pr_reservation {
-    /// Registrant for this reservation.
-    iscsi_scsi_pr_registrant *holder;
-
-    /// Current reservation key.
-    uint64_t cr_key;
-
-    /// Reservation type.
-    int type;
-
-    /// Reservation flags.
-    int32_t flags;
-} iscsi_scsi_pr_reservation;
-
-
-/**
- * @brief iSCSI SCSI Persistent Reservation (PR) registrant search by target and initiator port.
- *
- * This structure is used by iterating through
- * all iSCSI LUN Persistent Reservation (PR)
- * registrant's finding by target and initiator
- * port.
- */
-typedef struct iscsi_scsi_pr_registrant_get_reg {
-    /// Found iSCSI SCSI Persistent Reservation (PR) registrant is stored here, should be initialized to NULL.
-    iscsi_scsi_pr_registrant *reg;
-
-    /// The target port to be searched for is stored here.
-    iscsi_port *target_port;
-
-    /// The initiator port to be searched for is stored here.
-    iscsi_port *init_port;
-} iscsi_scsi_pr_registrant_get_reg;
-
-
 /// iSCSI SCSI task run: Unknown.
 #define ISCSI_SCSI_TASK_RUN_UNKNOWN  -1
 
@@ -10715,70 +5871,6 @@ typedef struct iscsi_scsi_pr_registrant_get_reg {
 typedef struct iscsi_scsi_task iscsi_scsi_task;
 typedef struct iscsi_scsi_lun iscsi_scsi_lun;
 
-
-/**
- * @brief Callback when iSCSI SCSI transfer task completed.
- *
- * This function is invoked when an iSCSI task
- * finished a transfer.
- *
- * @param[in] scsi_task Pointer to iSCSI SCSI task which
- * completed the transfer and may NOT be NULL,
- * so be careful.
- */
-typedef void (*iscsi_scsi_task_xfer_complete_callback)(iscsi_scsi_task *scsi_task);
-
-/**
- * @brief Callback when iSCSI SCSI transfer task destruction.
- *
- * This function is invoked when an iSCSI task
- * needs to be destroyed.
- *
- * @param[in] scsi_task Pointer to iSCSI SCSI task which
- * is about to be destroyed and may NOT be
- * NULL, so be careful.
- */
-typedef void (*iscsi_scsi_task_destroy_callback)(iscsi_scsi_task *scsi_task);
-
-/**
- * @brief Callback for I/O operation completion.
- *
- * This function is invoked when an I/O operation
- * has been completed.
- *
- * @param[in] image Pointer to DNBD3 image which completed the
- * I/O operation.
- * @param[in] user_data Pointer to user data.
- * @param[in] success true if I/O completed successfully or false
- * if it failed instead.
- * @return Pointer to passed user data.
- */
-typedef uint8_t *(*iscsi_scsi_emu_io_complete_callback)(dnbd3_image_t *image, uint8_t *user_data, const bool success);
-
-/**
- * @brief Callback for I/O wait operation.
- *
- * This function is invoked when an I/O
- * operation needs waiting.
- *
- * @param[in] user_data Pointer to user data.
- * @return Pointer to passed user data.
- */
-typedef uint8_t *(*iscsi_scsi_emu_io_wait_callback)(uint8_t *user_data);
-
-
-typedef struct iscsi_scsi_emu_io_wait {
-    /// I/O task wait callback associated DNBD3 image.
-    dnbd3_image_t *image;
-
-    /// I/O task wait callback function.
-    iscsi_scsi_emu_io_wait_callback callback;
-
-    /// I/O task wait callback user data.
-    uint8_t *user_data;
-} iscsi_scsi_emu_io_wait;
-
-
 /// iSCSI SCSI task flags: Read.
 #define ISCSI_SCSI_TASK_FLAGS_XFER_READ  (1 << 0)
 
@@ -10793,96 +5885,58 @@ typedef struct iscsi_scsi_emu_io_wait {
  * layer task management.
  */
 typedef struct iscsi_scsi_task {
-    /// Doubly linked list node, MUST be first element.
-    iscsi_node node;
-
-    /// SCSI LUN associated with this task.
-    iscsi_scsi_lun *lun;
-
-    /// Target iSCSI port.
-    iscsi_port *target_port;
-
-    /// Initiator iSCSI port.
-    iscsi_port *init_port;
-
-    /// SCSI Command Descriptor Block (CDB).
-    iscsi_scsi_cdb *cdb;
-
-    /// SCSI sense data.
-    iscsi_scsi_sense_data_packet *sense_data;
-
-    /// Transfer complete callback function.
-    iscsi_scsi_task_xfer_complete_callback xfer_complete_callback;
-
-    /// Task destruction callback function.
-    iscsi_scsi_task_destroy_callback destroy_callback;
-
-    /// I/O task complete callback function.
-    iscsi_scsi_emu_io_complete_callback io_complete_callback;
+	/// Connection associated with this task.
+	iscsi_connection *connection;
 
-    /// I/O task wait.
-    iscsi_scsi_emu_io_wait io_wait;
+	/// SCSI Command Descriptor Block (CDB).
+	iscsi_scsi_cdb *cdb;
 
-    /// Uplink read mutex for synchronization.
-    pthread_mutex_t uplink_mutex;
+	/// SCSI sense data.
+	iscsi_scsi_sense_data_packet *sense_data;
 
-    /// Conditional to signal uplink read complete.
-    pthread_cond_t uplink_cond;
+	/// Output buffer.
+	uint8_t *buf;
 
-    /// Output buffer.
-    uint8_t *buf;
+	/// Position of buffer in bytes.
+	uint32_t pos;
 
-    /// Position of buffer in bytes.
-    uint32_t pos;
+	/// Length of buffer in bytes.
+	uint32_t len;
 
-    /// Length of buffer in bytes.
-    uint32_t len;
+	/// Unique identifier for this task.
+	uint64_t id;
 
-    /// Unique identifier for this task.
-    uint64_t id;
+	/// Flags.
+	int flags;
 
-    /// Flags.
-    int flags;
+	/// Transfer position in bytes.
+	uint32_t xfer_pos;
 
-    /// Reference counter.
-    uint32_t ref;
+	/// Transfer length in bytes.
+	uint32_t xfer_len;
 
-    /// Transfer position in bytes.
-    uint32_t xfer_pos;
+	/// Sense data length.
+	uint8_t sense_data_len;
 
-    /// Transfer length in bytes.
-    uint32_t xfer_len;
+	/// iSCSI SCSI status code.
+	uint8_t status;
 
-    /// Sense data length.
-    uint8_t sense_data_len;
+	/// Uplink read mutex for sync
+	pthread_mutex_t uplink_mutex;
 
-    /// iSCSI SCSI status code.
-    uint8_t status;
-
-    /// Task management function.
-    uint8_t task_mgmt_func;
-
-    /// Task management response code.
-    uint8_t task_mgmt_response;
+	/// Conditional to signal uplink read complete
+	pthread_cond_t uplink_cond;
 } iscsi_scsi_task;
 
 
 /// iSCSI SCSI emulation physical block size in bytes.
-#define ISCSI_SCSI_EMU_PHYSICAL_BLOCK_SIZE 4096UL
+#define ISCSI_SCSI_EMU_PHYSICAL_BLOCK_SIZE      DNBD3_BLOCK_SIZE
 
 /// iSCSI SCSI emulation logical block size in bytes.
-#define ISCSI_SCSI_EMU_BLOCK_SIZE          512UL
-
-
-/// iSCSI SCSI emulation maximum tansfer length in logical blocks.
-#define ISCSI_SCSI_EMU_MAX_XFER_LEN        (ISCSI_DEFAULT_MAX_RECV_DS_LEN * ISCSI_DEFAULT_MAX_DATA_OUT_PER_CONNECTION)
-
-/// iSCSI SCSI emulation maximum UNMAP LBA count in LBAs.
-#define ISCSI_SCSI_EMU_MAX_UNMAP_LBA_COUNT (ISCSI_DEFAULT_MAX_RECV_DS_LEN * ISCSI_DEFAULT_MAX_DATA_IN_PER_CONNECTION)
-
-/// iSCSI SCSI emulation maximum UNMAP block descriptor count in block descriptors.
-#define ISCSI_SCSI_EMU_MAX_UNMAP_BLOCK_DESC_COUNT 256UL
+#define ISCSI_SCSI_EMU_BLOCK_SIZE      (512)
 
+/// Block shift difference between dnbd3 (4k) and iSCSI (512b)
+#define ISCSI_SCSI_EMU_BLOCK_DIFF_SHIFT     (3)
 
 /// iSCSI SCSI emulation I/O type: Removable.
 #define ISCSI_SCSI_EMU_IO_TYPE_REMOVABLE          (1 << 0)
@@ -10899,9 +5953,6 @@ typedef struct iscsi_scsi_task {
 /// iSCSI SCSI emulation I/O type: Device is (temporarily) write protected.
 #define ISCSI_SCSI_EMU_IO_TYPE_WRITE_PROTECT      (1 << 4)
 
-/// iSCSI SCSI emulation I/O type: Write cache available.
-#define ISCSI_SCSI_EMU_IO_TYPE_WRITE_CACHE        (1 << 5)
-
 
 /// iSCSI SCSI emulation block flags: Write operation.
 #define ISCSI_SCSI_EMU_BLOCK_FLAGS_WRITE  (1 << 0)
@@ -10910,332 +5961,79 @@ typedef struct iscsi_scsi_task {
 #define ISCSI_SCSI_EMU_BLOCK_FLAGS_VERIFY (1 << 1)
 
 
-void iscsi_scsi_task_create(iscsi_scsi_task *scsi_task, iscsi_scsi_task_xfer_complete_callback xfer_complete_callback, iscsi_scsi_task_destroy_callback destroy_callback); // Allocates and initializes a SCSI task
-void iscsi_scsi_task_destroy(iscsi_scsi_task *scsi_task); // Deallocates all resources acquired iscsi_scsi_task_create
-
-void iscsi_scsi_task_xfer_complete(iscsi_scsi_task *scsi_task); // Callback function when an iSCSI SCSI task completed the data transfer
-
-void iscsi_scsi_task_sense_data_check_cond_build(iscsi_scsi_task *scsi_task, const uint8_t sense_key, const uint8_t asc, const uint8_t ascq); // Allocates, if necessary and initializes SCSI sense data for check condition status code
-int iscsi_scsi_task_status_copy(iscsi_scsi_task *dst_scsi_task, const iscsi_scsi_task *src_scsi_task); // Copies iSCSI SCSI task sense data and status code
-void iscsi_scsi_task_lun_process_none(iscsi_scsi_task *scsi_task); // Processes a iSCSI SCSI task with no LUN identifier
-void iscsi_scsi_task_lun_process_abort(iscsi_scsi_task *scsi_task); // Processes a iSCSI SCSI aborted task
-
-iscsi_scsi_lun *iscsi_scsi_lun_create(const int lun_id); // Allocates and initializes an iSCSI LUN structure for linkage with a DNBD3 image
-int iscsi_scsi_lun_destroy_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data); // iSCSI SCSI LUN destructor callback for hash map
-void iscsi_scsi_lun_destroy(iscsi_scsi_lun *lun); // Deallocates all resources acquired by iscsi_scsi_lun_create
-
-uint64_t iscsi_scsi_lun_get_from_scsi(const int lun_id); // Converts an internal representation of a LUN identifier to an iSCSI LUN required for packet data
-int iscsi_scsi_lun_get_from_iscsi(const uint64_t lun); // Converts an iSCSI LUN from packet data to internal SCSI LUN identifier
-
-void iscsi_scsi_lun_task_append(iscsi_scsi_lun *lun, iscsi_scsi_task *scsi_task); // Appends an iSCSI SCSI task to a iSCSI SCSI LUN pending tasks doubly linked list
-void iscsi_scsi_lun_tasks_exec(iscsi_scsi_lun *lun); // Executes all iSCSI SCSI pending tasks assigned to a iSCSI SCSI LUN
-void iscsi_scsi_lun_task_run(iscsi_scsi_lun *lun, iscsi_scsi_task *scsi_task); // Runs an iSCSI SCSI task for a specified iSCSI SCSI LUN
-void iscsi_scsi_lun_task_complete(iscsi_scsi_lun *lun, iscsi_scsi_task *scsi_task); // Handles iSCSI SCSI task completition
-void iscsi_scsi_lun_task_exec(iscsi_scsi_lun *lun, iscsi_scsi_task *scsi_task); // Appends iSCSI SCSI task to pending tasks doubly linked list and / or runs it directly
-
-int iscsi_scsi_pr_check_scsi2(iscsi_scsi_task *scsi_task); // Checks the iSCSI SCSI Persistent Reservation (PR) SCSI-2 reserve of an iSCSI SCSI task
-int iscsi_scsi_pr_registrant_get_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data); // Finds an iSCSI SCSI Persistent Reservation (PR) registrant by target and initiator port
-int iscsi_scsi_pr_check(iscsi_scsi_task *scsi_task); // Checks the iSCSI SCSI Persistent Reservation (PR) of an iSCSI SCSI task
-int iscsi_scsi_pr_out(iscsi_scsi_task *scsi_task, iscsi_scsi_pr_reserve_out_parameter_list_packet *pr_reserve_out_parameter_list, const iscsi_scsi_cdb_pr_reserve_out *cdb_pr_reserve_out, const uint len); // Constructs an iSCSI SCSI Persistent Reservation (PR) out parameter list of an iSCSI SCSI task
-int iscsi_scsi_pr_in(iscsi_scsi_task *scsi_task, iscsi_scsi_pr_reserve_in_parameter_data_packet *pr_reserve_in_parameter_data, const iscsi_scsi_cdb_pr_reserve_in *cdb_pr_reserve_in, const uint len); // Constructs iSCSI SCSI Persistent Reservation (PR) in parameter data of an iSCSI SCSI task
-int iscsi_scsi_pr_reserve_scsi2(iscsi_scsi_task *scsi_task, const iscsi_scsi_cdb_pr_reserve_6 *cdb_pr_reserve_6); // Reserves an iSCSI SCSI Persistent Reservation (PR) of an iSCSI SCSI task
-int iscsi_scsi_pr_release_scsi2(iscsi_scsi_task *scsi_task); // Releases an iSCSI SCSI Persistent Reservation (PR) of an iSCSI SCSI task
-
-int iscsi_scsi_emu_io_block_read(iscsi_scsi_task *scsi_task, dnbd3_image_t *image, const uint64_t offset_blocks, const uint64_t num_blocks, const uint32_t block_size, iscsi_scsi_emu_io_complete_callback callback, uint8_t *user_data); // Reads a number of blocks from a block offset of a DNBD3 image to a specified buffer
-uint8_t *iscsi_scsi_emu_block_read_complete_callback(dnbd3_image_t *image, uint8_t *user_data, const bool success); // Completes an iSCSI SCSI task after a finished I/O read operation
-int iscsi_scsi_emu_io_block_cmp_write(iscsi_scsi_task *scsi_task, uint8_t *cmp_buf, dnbd3_image_t *image, const uint64_t offset_blocks, const uint64_t num_blocks, const uint32_t block_size, iscsi_scsi_emu_io_complete_callback callback, uint8_t *user_data); // Compares and writes a number of blocks starting from a block offset in a DNBD3 image with specified buffers
-uint8_t *iscsi_scsi_emu_block_write_complete_callback(dnbd3_image_t *image, uint8_t *user_data, const bool success); // Completes an iSCSI SCSI task after a finished I/O write operation
-int iscsi_scsi_emu_io_block_write(iscsi_scsi_task *scsi_task, dnbd3_image_t *image, const uint64_t offset_blocks, const uint64_t num_blocks, const uint32_t block_size, iscsi_scsi_emu_io_complete_callback callback, uint8_t *user_data); // Writes a number of blocks from a block offset to a DNBD3 image of a specified buffer
-int iscsi_scsi_emu_io_queue(iscsi_scsi_emu_io_wait *io_wait); // Enqueues an I/O wait in the thread pool to execute
-uint8_t *iscsi_scsi_emu_block_resubmit_process_callback(uint8_t *user_data); // Resubmits an iSCSI SCSI task for execution
-
-int iscsi_scsi_emu_primary_inquiry_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data); // Fills in a single Vital Product Data (VPD) SCSI Port Designation Descriptor entry of an INQUIRY operation
-int iscsi_scsi_emu_exec(iscsi_scsi_task *scsi_task); // Executes the iSCSI SCSI emulation for an iSCSI SCSI task
-
-
-/// iSCSI port flags: In use.
-#define ISCSI_PORT_FLAGS_IN_USE (1 << 0)
-
-
-/**
- * @brief iSCSI port.
- *
- * This structure maintains the transport ID,
- * name, identifiers and index of an ISCSI
- * port.
- */
-typedef struct iscsi_port {
-    /// Transport ID.
-    iscsi_transport_id *transport_id;
-
-    /// Name.
-    uint8_t *name;
-
-    /// Identifier.
-    uint64_t id;
-
-    /// Flags.
-    int flags;
-
-    /// Index.
-    uint16_t index;
-
-    /// Transport ID length.
-    uint16_t transport_id_len;
-} iscsi_port;
-
-
-iscsi_port *iscsi_port_create(const uint8_t *name, const uint64_t id, const uint16_t index); // Allocates and initializes an iSCSI port
-int iscsi_port_destroy_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data); // iSCSI port destructor callback for hash map
-void iscsi_port_destroy(iscsi_port *port); // Deallocates all resource acquired iscsi_port_create
-
-uint8_t *iscsi_port_get_name(const iscsi_port *port); // Retrieves the name of an iSCSI port
-
-int iscsi_port_transport_id_set(iscsi_port *port, const uint8_t *name, const uint64_t isid); // Sets the SCSI transport ID of the iSCSI port
-
-
-/// iSCSI SCSI LUN flags: Removed.
-#define ISCSI_SCSI_LUN_FLAGS_REMOVED  (1 << 0)
-
-/// iSCSI SCSI LUN flags: Resizing.
-#define ISCSI_SCSI_LUN_FLAGS_RESIZING (1 << 1)
-
-
-typedef struct iscsi_device iscsi_device;
-
-
-/**
- * @brief iSCSI SCSI LUN.
- *
- * This structure managesw the SCSI
- * LUNs attached to an iSCSI device
- * and associates a disk image file.
- */
-typedef struct iscsi_scsi_lun {
-    /// Doubly linked list containing associated tasks with this LUN.
-    iscsi_list tasks;
-
-    /// Mutex for accessing the associated tasks through multiple threads.
-    pthread_mutex_t tasks_mutex;
-
-    /// Doubly linked list containing associated pending tasks with this LUN.
-    iscsi_list tasks_pending;
-
-    /// Mutex for accessing the associated pending tasks through multiple threads.
-    pthread_mutex_t tasks_pending_mutex;
-
-    /// Doubly linked list containing associated management tasks with this LUN.
-    iscsi_list tasks_mgmt;
-
-    /// Mutex for accessing the associated management tasks through multiple threads.
-    pthread_mutex_t tasks_mgmt_mutex;
-
-    /// Doubly linked list containing associated management pending tasks with this LUN.
-    iscsi_list tasks_mgmt_pending;
-
-    /// Mutex for accessing the associated management pending tasks through multiple threads.
-    pthread_mutex_t tasks_mgmt_pending_mutex;
-
-    /// Doubly linked list containg Persistent Reservation (PR) registrant for I_T nexus.
-    iscsi_hashmap *pr_regs;
-
-    /// Persistent Reservation (PR) for the LUN.
-    iscsi_scsi_pr_reservation pr_reservation;
-
-    /// Persistent Reservation (PR) holder for SPC2 RESERVE(6) and RESERVE(10).
-    iscsi_scsi_pr_registrant pr_scsi2_holder;
-
-    /// iSCSI device which belongs to this LUN.
-    iscsi_device *device;
-
-    /// Assocated DNBD3 image for this LUN.
-    dnbd3_image_t *image;
-
-    /// LUN identifier (always MUST be between 0 and 7).
-    int id;
-
-    /// Flags.
-    int flags;
-
-    /// Persistent Reservation (PR) generation.
-    uint32_t pr_gen;
-} iscsi_scsi_lun;
-
-
-/// iSCSI device flags: Allocated.
-#define ISCSI_DEVICE_FLAGS_ALLOCATED (1 << 0)
-
-/// iSCSI device flags: Removed.
-#define ISCSI_DEVICE_FLAGS_REMOVED   (1 << 1)
-
-
-/**
- * @brief iSCSI device.
- *
- * This structure managesw the SCSI
- * devices and associates the
- * disk image files with them.
- */
-typedef struct iscsi_device {
-    /// Name of device.
-    uint8_t *name;
-
-    /// LUNs associated with this device.
-    iscsi_hashmap *luns;
-
-    /// Read/write lock for hash map containing all LUNs associated with this device. MUST be initialized with iscsi_create before any iSCSI functions are used.
-    pthread_rwlock_t luns_rwlock;
-
-    /// Ports associated with this device.
-    iscsi_hashmap *ports;
-
-    /// Device identifier.
-    int id;
-
-    /// Flags.
-    int flags;
-
-    /// Number of active connections for this device.
-	uint32_t active_conns;
-
-    /// Protocol identifier.
-    uint8_t protocol_id;
-} iscsi_device;
-
-
-/// iSCSI target node maximum length.
-#define ISCSI_TARGET_NODE_MAX_NAME_LEN 223U
-
-
-/// iSCSI target node IQN identifier prefix string.
-#define ISCSI_TARGET_NODE_NAME_IQN_PREFIX "iqn."
-
-/// iSCSI target node IEEE NAA identifier prefix string.
-#define ISCSI_TARGET_NODE_NAME_NAA_PREFIX "naa."
-
-/// iSCSI target node EUI identifier prefix string.
-#define ISCSI_TARGET_NODE_NAME_EUI_PREFIX "eui."
-
 
 /// iSCSI target node WWN identifier prefix string.
-#define ISCSI_TARGET_NODE_NAME_WWN_PREFIX "wwn-0x"
+#define ISCSI_TARGET_NODE_WWN_NAME_PREFIX "wwn-0x"
 
+/// iSCSI target node maximum length
+#define ISCSI_TARGET_NODE_MAX_NAME_LEN 223U
 
-/// iSCSI target node flags: CHAP authentication disabled.
-#define ISCSI_TARGET_NODE_FLAGS_CHAP_DISABLE  (1 << 0)
-
-/// iSCSI target node flags: CHAP authentication required.
-#define ISCSI_TARGET_NODE_FLAGS_CHAP_REQUIRE  (1 << 1)
 
-/// iSCSI target node flags: CHAP authentication mutual.
-#define ISCSI_TARGET_NODE_FLAGS_CHAP_MUTUAL   (1 << 2)
+/// iSCSI session type: Invalid.
+#define ISCSI_SESSION_TYPE_INVALID   0
 
-/// iSCSI target node flags: Destroyed.
-#define ISCSI_TARGET_NODE_FLAGS_DESTROYED     (1 << 3)
+/// iSCSI session type: Normal.
+#define ISCSI_SESSION_TYPE_NORMAL    1
 
+/// iSCSI session type: Discovery.
+#define ISCSI_SESSION_TYPE_DISCOVERY 2
 
 /**
- * @brief iSCSI target node.
- *
- * This structure maintains the name, alias,
- * associated device and connection data
- * for a specific iSCSI target node.
+ * All mandatory fields in login process.
+ * Set to -1 or NULL if not sent by client.
  */
-typedef struct iscsi_target_node {
-    /// Name of target node.
-    uint8_t *name;
-
-    /// Alias name of target node.
-    uint8_t *alias;
-
-    /// Associated iSCSI device.
-    iscsi_device *device;
-
-    /// Target node number.
-    uint num;
-
-    /// Queue depth.
-    uint queue_depth;
-
-    /// Flags.
-    int flags;
-
-    /// Header digest size (always MUST be 0 or 4 for now).
-    int header_digest;
-
-    /// Data digest size (always MUST be 0 or 4 for now).
-    int data_digest;
+typedef struct iscsi_login_kvp
+{
+	/// Largest PDU client can receive.
+	int MaxRecvDataSegmentLength;
 
-    /// CHAP group ID.
-    int32_t chap_group;
+	/// Maximum burst length client can receive.
+	int MaxBurstLength;
 
-    /// Number of active connections for this target node.
-	uint32_t active_conns;
-} iscsi_target_node;
+	// Maximum unsolicited burst length client can receive.
+	int FirstBurstLength;
 
+	/// Maximum number of connections.
+	int MaxConnections;
 
-/**
- * @brief iSCSI target node search by name.
- *
- * This structure is used by iterating through
- * all iSCSI target nodes finding by name.
- */
-typedef struct iscsi_target_node_find_name {
-    /// Found iSCSI target node is stored here, should be initialized to NULL.
-    iscsi_target_node *target;
+	/// Error recovery level.
+	int ErrorRecoveryLevel;
 
-    /// The name of the target node to search for.
-    uint8_t *name;
-} iscsi_target_node_find_name;
+	/// The session type (Discovery, Normal).
+	const char *SessionType;
 
+	/// Desired auth method.
+	const char *AuthMethod;
 
-/// iSCSI authentication CHAP phase: None.
-#define ISCSI_AUTH_CHAP_PHASE_NONE    0
+	/// SendTargets command.
+	const char *SendTargets;
 
-/// iSCSI authentication CHAP phase: Wait A.
-#define ISCSI_AUTH_CHAP_PHASE_WAIT_A  1
+	/// HeaderDigest requested by client.
+	const char *HeaderDigest;
 
-/// iSCSI authentication CHAP phase: Wait NR.
-#define ISCSI_AUTH_CHAP_PHASE_WAIT_NR 2
+	/// DataDigest requested by client.
+	const char *DataDigest;
 
-/// iSCSI authentication CHAP phase: End.
-#define ISCSI_AUTH_CHAP_PHASE_END     3
+	const char *InitiatorName;
 
+	const char *TargetName;
+} iscsi_negotiation_kvp;
 
 /**
- * @brief iSCSI CHAP authentication data structure.
- *
- * This structure maintains all data required for
- * CHAP authentication method.
+ * Options/limits the client told us that
+ * are relevant for proper communication
  */
-typedef struct iscsi_auth_chap {
-    /// CHAP phase.
-    int phase;
-} iscsi_auth_chap;
-
-
-/// iSCSI session flags: Initial ready to transfer.
-#define ISCSI_SESSION_FLAGS_INIT_R2T          (1 << 0)
-
-/// iSCSI session flags: Immediate data.
-#define ISCSI_SESSION_FLAGS_IMMEDIATE_DATA    (1 << 1)
-
-/// iSCSI session flags: Data PDU in order.
-#define ISCSI_SESSION_FLAGS_DATA_PDU_IN_ORDER (1 << 2)
-
-/// iSCSI session flags: Data sequence in order.
-#define ISCSI_SESSION_FLAGS_DATA_SEQ_IN_ORDER (1 << 3)
-
-
-/// iSCSI session type: Invalid.
-#define ISCSI_SESSION_TYPE_INVALID   0
-
-/// iSCSI session type: Normal.
-#define ISCSI_SESSION_TYPE_NORMAL    1
+typedef struct iscsi_session_options
+{
+	/// Largest PDU client can receive.
+	int MaxRecvDataSegmentLength;
 
-/// iSCSI session type: Discovery.
-#define ISCSI_SESSION_TYPE_DISCOVERY 2
+	/// Maximum burst length client can receive.
+	int MaxBurstLength;
 
+	// Maximum unsolicited burst length client can receive.
+	int FirstBurstLength;
+} iscsi_session_options;
 
 /**
  * @brief iSCSI session.
@@ -11245,68 +6043,29 @@ typedef struct iscsi_auth_chap {
  * login phase.
  */
 typedef struct iscsi_session {
-    /// List of iSCSI connections associated with this session.
-    iscsi_list conn_list;
-
-    /// Initiator port.
-    iscsi_port *init_port;
-
-    /// Hash map of login key / value pairs negotiated with this session.
-    iscsi_hashmap *key_value_pairs;
-
-    /// iSCSI target node.
-    iscsi_target_node *target;
-
-    /// Portal group tag.
-    uint64_t tag;
-
-    /// Initiator Session ID (ISID).
-    uint64_t isid;
+	/// Initiator Session ID (ISID).
+	uint64_t isid;
 
-    /// Target Session Identifying Handle (TSIH).
-    uint64_t tsih;
+	/// Target Session Identifying Handle (TSIH).
+	uint64_t tsih;
 
-    /// Flags (extracted from key and value pairs).
-    int flags;
+	/// Flags (extracted from key and value pairs).
+	int flags;
 
-    /// Queue depth.
-    uint queue_depth;
+	/// iSCSI session type.
+	int type;
 
-    /// iSCSI session type.
-    int type;
+	/// ExpCmdSN.
+	uint32_t exp_cmd_sn;
 
-    /// Number of active connections linked to this session.
-    uint32_t conns;
+	/// MaxCmdSN.
+	uint32_t max_cmd_sn;
 
-    /// Maximum number of connections.
-    uint32_t max_conns;
+	/// Current text Initiator Task Tag (ITT).
+	uint32_t current_text_init_task_tag;
 
-    /// Ready to transfer maximum outstanding value.
-    uint32_t max_outstanding_r2t;
-
-    /// Default time to wait.
-    uint32_t default_time_to_wait;
-
-    /// Default time to retain.
-    uint32_t default_time_to_retain;
-
-    /// First burst length.
-    uint32_t first_burst_len;
-
-    /// Maximum burst length.
-    uint32_t max_burst_len;
-
-    /// Error recovery level.
-    uint32_t err_recovery_level;
-
-    /// ExpCmdSN.
-    uint32_t exp_cmd_sn;
-
-    /// MaxCmdSN.
-    uint32_t max_cmd_sn;
-
-    /// Current text Initiator Task Tag (ITT).
-    uint32_t current_text_init_task_tag;
+	/// Session options client sent in login request.
+	iscsi_session_options opts;
 } iscsi_session;
 
 
@@ -11320,16 +6079,16 @@ typedef struct iscsi_pdu iscsi_pdu;
 #define ISCSI_CONNECT_PDU_READ_PROCESSED                          1
 
 /// iSCSI connection read packet data return code from iscsi_connection_pdu_read function: Fatail error during packet parsing.
-#define ISCSI_CONNECT_PDU_READ_ERR_FATAL                         -1
+#define ISCSI_CONNECT_PDU_READ_ERR_FATAL                         (-1)
 
 /// iSCSI connection read packet data return code from iscsi_connection_pdu_read function: Login error response.
-#define ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE                -2
+#define ISCSI_CONNECT_PDU_READ_ERR_LOGIN_RESPONSE                (-2)
 
 /// iSCSI connection read packet data return code from iscsi_connection_pdu_read function: Login parameter error.
-#define ISCSI_CONNECT_PDU_READ_ERR_LOGIN_PARAMETER               -3
+#define ISCSI_CONNECT_PDU_READ_ERR_LOGIN_PARAMETER               (-3)
 
 /// iSCSI connection read packet data return code from iscsi_connection_pdu_read function: Login parameter not exchanged once error.
-#define ISCSI_CONNECT_PDU_READ_ERR_LOGIN_PARAMETER_XCHG_NOT_ONCE -4
+#define ISCSI_CONNECT_PDU_READ_ERR_LOGIN_PARAMETER_XCHG_NOT_ONCE (-4)
 
 
 /// iSCSI connection flags: Stopped.
@@ -11399,258 +6158,59 @@ typedef struct iscsi_pdu iscsi_pdu;
  * and iSCSI portals.
  */
 typedef struct iscsi_connection {
-    /// Doubly linked list node, MUST be first element.
-    iscsi_node node;
-
-    /// iSCSI session associated with this connection.
-    iscsi_session *session;
+	/// iSCSI session associated with this connection.
+	iscsi_session *session;
 
-    /// Hash map containing login text key / value pairs associated to this connection.
-    iscsi_hashmap *key_value_pairs;
+	/// Associated dnbd3 client
+	dnbd3_client_t *client;
 
-    /// Temporarily storage for partially received login parameter.
-    uint8_t *partial_pairs;
+	/// Current PDU being processed.
+	iscsi_pdu *pdu_processing;
 
-    /// Hash map containing text key / value pairs associated to this connection.
-    iscsi_hashmap *text_key_value_pairs;
+	/// Login response PDU.
+	iscsi_pdu *login_response_pdu;
 
-    /// Temporarily storage for partially received text parameter.
-    uint8_t *text_partial_pairs;
+	/// Internal connection identifier
+	int id;
 
-    /// iSCSI device.
-    iscsi_device *device;
+	/// iSCSI connection receiving state.
+	int pdu_recv_state;
 
-    /// iSCSI initiator port.
-    iscsi_port *init_port;
+	/// iSCSI connection flags.
+	int flags;
 
-    /// Initiator name.
-    uint8_t *init_name;
+	/// iSCSI connection state.
+	int state;
 
-    //// Initiator IP address.
-    uint8_t *init_adr;
+	/// iSCSI connection login phase.
+	int login_phase;
 
-    /// iSCSI target node.
-    iscsi_target_node *target;
+	/// Initiator Session ID (ISID).
+	iscsi_isid isid;
 
-    /// iSCSI target port.
-    iscsi_port *target_port;
+	/// Target Session Identifying Handle (TSIH).
+	uint16_t tsih;
 
-    /// iSCSI target short name.
-    uint8_t *target_name_short;
+	/// Connection ID (CID).
+	uint16_t cid;
 
-    /// iSCSI portal host name.
-    uint8_t *portal_host;
+	/// Bit mask for connection state key negotiation.
+	uint16_t state_negotiated;
 
-    /// iSCSI portal host port.
-    uint8_t *portal_port;
+	/// Bit mask for session state key negotiation.
+	uint32_t session_state_negotiated;
 
-    /// Current PDU being processed.
-    iscsi_pdu *pdu_processing;
+	/// Initiator Task Tag (ITT).
+	uint32_t init_task_tag;
 
-    /// Login response PDU.
-    iscsi_pdu *login_response_pdu;
+	/// Targer Transfer Tag (TTT).
+	uint32_t target_xfer_tag;
 
-    /// Doubly linked list containing enqueued SCSI Data In tasks.
-    iscsi_list scsi_data_in_queued_tasks;
-
-    /// Doubly linked list containing writing PDU's associated with this connection.
-    iscsi_list pdus_write;
-
-    /// Doubly linked list containing SNACK PDU's associated with this connection.
-    iscsi_list pdus_snack;
-
-    /// Doubly linked list containing active Ready To Transfer (R2T) tasks.
-    iscsi_list r2t_tasks_active;
-
-    /// Doubly linked list containing queued Ready To Transfer (R2T) tasks.
-    iscsi_list r2t_tasks_queue;
-
-    /// iSCSI SendTargets total number of bytes completed.
-    uint target_send_total_size;
-
-    /// iSCSI SCSI Data In count.
-    uint scsi_data_in_cnt;
-
-    /// iSCSI SCSI Data Out count.
-    uint scsi_data_out_cnt;
-
-    /// iSCSI tasks pending count.
-    uint task_cnt;
-
-    /// Pending Ready To Transfer (R2T) tasks.
-    uint r2t_pending;
-
-    /// iSCSI connection contains a header digest (CRC32), always MUST be 0 or 4 for now.
-    int header_digest;
-
-    /// iSCSI connection contains a data digest (CRC32), always MUST be 0 or 4 for now.
-    int data_digest;
-
-    /// Internal connection identifier (key of iSCSI global vector hash map).
-    int id;
-
-    /// Connected TCP/IP socket.
-    int sock;
-
-    /// iSCSI connection receiving state.
-    int pdu_recv_state;
-
-    /// iSCSI connection flags.
-    int flags;
-
-    /// iSCSI connection state.
-    int state;
-
-    /// iSCSI connection login phase.
-    int login_phase;
-
-    /// Maximum receive DataSegment length in bytes.
-    uint32_t max_recv_ds_len;
-
-    /// Portal group tag.
-    uint64_t pg_tag;
-
-    /// Initiator Session ID (ISID).
-    iscsi_isid isid;
-
-    /// Target Session Identifying Handle (TSIH).
-    uint16_t tsih;
-
-    /// Connection ID (CID).
-    uint16_t cid;
-
-    /// Bit mask for connection state key negotiation.
-    uint16_t state_negotiated;
-
-    /// Bit mask for session state key negotiation.
-    uint32_t session_state_negotiated;
-
-    /// Initiator Task Tag (ITT).
-    uint32_t init_task_tag;
-
-    /// Targer Transfer Tag (TTT).
-    uint32_t target_xfer_tag;
-
-    /// CHAP authentication.
-    iscsi_auth_chap auth_chap;
-
-    /// CHAP group id.
-    int32_t chap_group;
-
-    /// StatSN.
-    uint32_t stat_sn;
-
-    /// ExpStatSN.
-    uint32_t exp_stat_sn;
-
-    /// Execution queue to run to invoke callback functions after asynchronous I/O has been finished.
-    iscsi_list exec_queue;
-
-    // TODO: Remove after test finish
-    iscsi_hashmap *stat_iscsi_opcodes;
-
-    // TODO: Remove after test finish
-    iscsi_hashmap *stat_scsi_opcodes;
+	/// StatSN.
+	uint32_t stat_sn;
 } iscsi_connection;
 
 
-/**
- * @brief iSCSI transfer completed callback function.
- *
- * This function is invoked when the response PDU
- * write to the TCP/IP socket has been completed.
- *
- * @param[in] user_data Pointer to user data.
- */
-typedef void (*iscsi_connection_xfer_complete_callback)(uint8_t *user_data);
-
-
-/**
- * @brief Callback for iSCSI connection write TCP/IP write operation completion.
- *
- * This function is invoked when the sending
- * TCP/IP transfer has been finished.
- *
- * @param[in] user_data Pointer to user data.
- * @param[in] err 0 if I/O completed successfully or an
- * error code indicating the problem.
- */
-typedef void (*iscsi_connection_write_complete_callback)(uint8_t *user_data, int err);
-
-
-/// iSCSI connection asynchronous execution queue: SCSI emulation I/O.
-#define ISCSI_CONNECT_EXEC_QUEUE_TYPE_SCSI_EMU_IO 0U
-
-/// iSCSI connection asynchronous execution queue: PDU write I/O.
-#define ISCSI_CONNECT_EXEC_QUEUE_TYPE_PDU_WRITE   1U
-
-
-/**
- * @brief iSCSI connection execution queue.
- *
- * This structure is used for invoking the
- * callback functions after processing has
- * been completed.\n
- * Currently, PDU writes and SCSI emulation
- * invoke I/O callbacks after finishing
- * their operations.
- */
-typedef struct iscsi_connection_exec_queue {
-    /// Doubly linked list node, MUST be first element.
-    iscsi_node node;
-
-    /**
-     * @union data
-     * @brief Invokes callback functions with arguments based on the execution queue type.
-     *
-     * This union contains the arguments needed
-     * for their respective callback functions
-     * of the completion process.
-     */
-    union {
-        /**
-         * @brief PDU write completion callback and arguments.
-         *
-         * For PDU write completion type, two arguments
-         * are passed.
-         */
-        struct {
-            /// Callback function to invoke after PDU write completion process has been completed.
-            iscsi_connection_write_complete_callback callback;
-
-            /// User data to be passed to the PDU write completion process callback function.
-            uint8_t *user_data;
-
-            /// Error code to be passed to the PDU write completion process callback function.
-            int err;
-        } pdu_write;
-
-        /**
-         * @brief I/O completion callback and arguments.
-         *
-         * For I/O completion type, three arguments
-         * are passed.
-         */
-        struct {
-            /// Callback function to invoke after I/O process has been completed.
-            iscsi_scsi_emu_io_complete_callback callback;
-
-            /// DNBD3 image to be passed to the I/O completion process callback function.
-            dnbd3_image_t *image;
-
-            /// User data to be passed to the I/O completion process callback function.
-            uint8_t *user_data;
-
-            /// Successful state passed to the I/O completion process callback function.
-            bool success;
-        } io;
-    } data;
-
-    /// Type of completion callback.
-    uint type;
-} iscsi_connection_exec_queue;
-
-
 typedef struct iscsi_task iscsi_task;
 
 
@@ -11666,77 +6226,38 @@ typedef struct iscsi_task iscsi_task;
  * and filling the BHS, AHS and DS properly.
  */
 typedef struct iscsi_pdu {
-    /// Doubly linked list node, MUST be first element.
-    iscsi_node node;
-
-    /// iSCSI Basic Header Segment (BHS) packet data.
-    iscsi_bhs_packet *bhs_pkt;
-
-    /// iSCSI Advanced Header Segment (AHS) packet data for fast access and is straight after BHS packet in memory.
-    iscsi_ahs_packet *ahs_pkt;
-
-    /// Header digest (CRC32C) packet data for fast access and is straight after BHS and AHS packet in memory.
-    iscsi_header_digest *header_digest;
-
-    /// iSCSI DataSegment (DS) packet data for fast access and is straight after BHS, AHS and header digest packet in memory.
-    iscsi_scsi_ds_cmd_data *ds_cmd_data;
-
-    /// Data digest (CRC32C) packet data for fast access and is straight after BHS, AHS, header digest and DataSegment packet in memory.
-    iscsi_data_digest *data_digest;
-
-    /// iSCSI task handling this PDU.
-    iscsi_task *task;
-
-    /// Associated iSCSI connection.
-    iscsi_connection *conn;
-
-    /// Transfer complete callback function.
-    iscsi_connection_xfer_complete_callback xfer_complete_callback;
-
-    /// Transfer complete callback user data (arguments).
-    uint8_t *xfer_complete_user_data;
-
-    /// Flags.
-    int flags;
-
-    /// Reference counter.
-    uint32_t ref;
-
-    /// Bytes of Basic Header Segment (BHS) already read.
-    uint bhs_pos;
-
-    /// Bytes of Advanced Header Segment (AHS) already read.
-    uint ahs_pos;
+	/// iSCSI Basic Header Segment (BHS) packet data.
+	iscsi_bhs_packet *bhs_pkt;
 
-    /// AHSLength.
-    uint ahs_len;
+	/// iSCSI Advanced Header Segment (AHS) packet data for fast access and is straight after BHS packet in memory.
+	iscsi_ahs_packet *ahs_pkt;
 
-    /// Bytes of header digest (CRC32C) already read.
-    uint header_digest_pos;
+	/// iSCSI DataSegment (DS) packet data for fast access and is straight after BHS, AHS and header digest packet in memory.
+	iscsi_scsi_ds_cmd_data *ds_cmd_data;
 
-    /// Header digest size (always 0 or 4 for now).
-    int header_digest_size;
+	/// iSCSI task handling this PDU.
+	iscsi_task *task;
 
-    /// DataSegmentLength.
-    uint32_t ds_len;
+	/// Flags.
+	int flags;
 
-    /// Position of DataSegment buffer for next operation.
-    uint32_t pos;
+	/// Bytes of Basic Header Segment (BHS) already read.
+	uint bhs_pos;
 
-    /// Allocated DataSegment buffer length.
-    uint32_t len;
+	/// AHSLength.
+	uint ahs_len;
 
-    /// Bytes of data digest (CRC32C) already read.
-    uint data_digest_pos;
+	/// DataSegmentLength.
+	uint32_t ds_len;
 
-    /// Data digest size (always 0 or 4 for now).
-    int data_digest_size;
+	/// DS Buffer write pos when filling buffer for sending.
+	uint32_t ds_write_pos;
 
-    /// Tasks referenced by this PDU counter.
-    uint task_ref_cnt;
+	/// Read position in AHS + DS buffer (recv).
+	uint32_t recv_pos;
 
-    /// CmdSN.
-    uint32_t cmd_sn;
+	/// CmdSN.
+	uint32_t cmd_sn;
 } iscsi_pdu;
 
 
@@ -11754,163 +6275,43 @@ typedef struct iscsi_pdu {
  * including the underlying SCSI layer.
  */
 typedef struct iscsi_task {
-    /// Doubly linked list node, MUST be first element.
-    iscsi_node node;
+	/// Underlying SCSI task structure.
+	iscsi_scsi_task scsi_task;
 
-    /// Underlying SCSI task structure.
-    iscsi_scsi_task scsi_task;
+	/// Associated iSCSI connection.
+	iscsi_connection *conn;
 
-    /// Parent iSCSI task.
-    iscsi_task *parent;
+	/// Buffer position in bytes.
+	uint32_t pos;
 
-    /// Sub tasks doubly linked list for splitted data transfers.
-    iscsi_list sub_tasks;
+	/// Buffer length in bytes.
+	uint32_t len;
 
-    /// Associated iSCSI connection.
-    iscsi_connection *conn;
+	/// Unique identifier for this task.
+	uint64_t id;
 
-    /// Associated iSCSI PDU.
-    iscsi_pdu *pdu;
+	/// Flags.
+	int flags;
 
-    /// Buffer position in bytes.
-    uint32_t pos;
+	/// LUN identifier associated with this task (always MUST be between 0 and 7), used for hot removal tracking.
+	int lun_id;
 
-    /// Buffer length in bytes.
-    uint32_t len;
+	/// Initiator Task Tag (ITT).
+	uint32_t init_task_tag;
 
-    /// Unique identifier for this task.
-    uint64_t id;
+	/// Target Transfer Tag (TTT).
+	uint32_t target_xfer_tag;
 
-    /// Flags.
-    int flags;
+	/// Desired number of bytes completed.
+	uint32_t des_data_xfer_pos;
 
-    /// LUN identifier associated with this task (always MUST be between 0 and 7), used for hot removal tracking.
-    int lun_id;
+	/// Desired data transfer length.
+	uint32_t des_data_xfer_len;
 
-    /// Initiator Task Tag (ITT).
-    uint32_t init_task_tag;
-
-    /// Target Transfer Tag (TTT).
-    uint32_t target_xfer_tag;
-
-    /// Desired number of bytes completed.
-    uint32_t des_data_xfer_pos;
-
-    /// Desired data transfer length.
-    uint32_t des_data_xfer_len;
-
-    /// SCSI Data In Data Sequence Number (DataSN).
-    uint32_t data_sn;
-
-    /// SCSI Data Out count.
-    uint32_t scsi_data_out_cnt;
-
-    /// Length in bytes of R2T, used for ensuring that R2T burst does not exceed MaxBurstLength.
-    uint32_t r2t_len;
-
-    /// Ready To Transfer Sequence Number (R2TSN).
-    uint32_t r2t_sn;
-
-    /// Next expected Ready To Transfer offset is used for receiving the Data-OUT PDU.
-    uint32_t r2t_next_exp_pos;
-
-    /// Ready To Transfer DataSN, used for next sequence of a R2TSN.
-    uint32_t r2t_data_sn;
-
-    /// Next R2TSN to be acknowledged.
-    uint32_t r2t_sn_ack;
-
-    /// Outstanding Ready To Transfer (R2T) count.
-    uint32_t r2t_outstanding;
+	/// SCSI Data In Data Sequence Number (DataSN).
+	uint32_t data_sn;
 } iscsi_task;
 
-
-iscsi_task *iscsi_task_create(iscsi_connection *conn, iscsi_task *parent, iscsi_scsi_task_xfer_complete_callback callback); // Allocates and initializes an iSCSI task structure
-void iscsi_task_destroy_callback(iscsi_scsi_task *scsi_task); // Deallocates all resources of the iSCSI task of an iSCSI SCSI task
-void iscsi_task_destroy(iscsi_task *task); // Deallocates resources acquired by iscsi_task_create
-
-void iscsi_task_queue(iscsi_connection *conn, iscsi_task *task); // Enqueues an iSCSI task
-
-void iscsi_task_xfer_complete_process_read(iscsi_connection *conn, iscsi_task *task, iscsi_task *primary_task); // Processes an iSCSI SCSI task which completed a read data transfer
-bool iscsi_task_xfer_del(iscsi_connection *conn, const uint32_t target_xfer_tag); // Deletes an iSCSI task from the active Ready To Transfer (R2T) doubly linked list by Target Transfer Tag (TTT)
-void iscsi_task_xfer_complete_process_other(iscsi_connection *conn, iscsi_task *task, iscsi_task *primary_task); // Processes an iSCSI SCSI task which completed a non-read data transfer
-
-void iscsi_task_response(iscsi_connection *conn, iscsi_task *task); // Creates, initializes and sends an iSCSI task reponse PDU.
-
-iscsi_device *iscsi_device_create(const uint8_t *name, const int lun_id, const uint8_t protocol_id); // Creates and initializes an iSCSI device with a maximum number of LUNs
-int iscsi_device_destroy_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data); // iSCSI device destructor callback for hash map
-void iscsi_device_destroy(iscsi_device *device); // Deallocates all resources acquired by iscsi_device_create
-
-iscsi_port *iscsi_device_find_port_by_portal_group_tag(const iscsi_device *device, const uint64_t id); // Gets an iSCSI device being in use by portal group identifier
-iscsi_scsi_lun *iscsi_device_find_lun(iscsi_device *device, const int lun_id); // Searches an iSCSI LUN by LUN identifier
-
-int iscsi_device_port_add(iscsi_device *device, const uint8_t *name, const uint64_t id); // Creates, initializes and adds an iSCSI target port to an iSCSI device
-
-void iscsi_device_scsi_task_queue(iscsi_device *device, iscsi_scsi_task *scsi_task); // Enqueues an iSCSI SCSI task to the first LUN of an iSCSI device
-
-int iscsi_target_node_create_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data); // Creates, initializes and adds a portal group to an iSCSI target node
-iscsi_target_node *iscsi_target_node_create(uint8_t *name, const uint8_t *alias, const int index, const int lun_id, const uint queue_depth, const int flags, const int32_t chap_group, const int header_digest, const int data_digest); // Creates and initializes an iSCSI target node
-int iscsi_target_node_destroy_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data); // iSCSI target node destructor callback for hash map
-void iscsi_target_node_destroy(iscsi_target_node *target); // Deallocates all resources acquired by iscsi_target_node_create
-
-int32_t iscsi_target_node_send(iscsi_connection *conn, const uint8_t *dst_iqn, const uint8_t *src_iqn, uint8_t *buf, const uint32_t pos, const uint32_t len); // Sends a buffer from a source iSCSI IQN to target iSCSI IQNs
-uint64_t iscsi_target_node_wwn_get(const uint8_t *name); // Calculates the WWN using 64-bit IEEE Extended NAA for a name
-dnbd3_image_t *iscsi_target_node_image_get(uint8_t *iqn); // Extracts the DNBD3 image out of an iSCSI IQN string and opens the DNBD3 image
-int iscsi_target_node_find_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data); // Finds an iSCSI target node by case insensitive name search
-iscsi_target_node *iscsi_target_node_find(uint8_t *target_name); // Searches an iSCSI target node by name using case insensitive search
-
-uint8_t *iscsi_target_node_get_redirect(iscsi_connection *conn, iscsi_target_node *target); // Retrieves target node redirection address
-int iscsi_target_node_access(iscsi_connection *conn, iscsi_target_node *target, const uint8_t *iqn, const uint8_t *adr); // Checks if target node is accessible
-
-iscsi_session *iscsi_session_create(iscsi_connection *conn, iscsi_target_node *target, const int type); // Creates and initializes an iSCSI session
-int iscsi_session_destroy_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data); // iSCSI session destructor callback for hash map
-void iscsi_session_destroy(iscsi_session *session); // Deallocates all resources acquired by iscsi_session_create
-
-int iscsi_session_init_key_value_pairs(iscsi_hashmap *key_value_pairs); // Initializes a key and value pair hash table with default values
-
-iscsi_connection *iscsi_connection_create(iscsi_portal *portal, const int sock); // Creates data structure for an iSCSI connection from iSCSI portal and TCP/IP socket
-int iscsi_connection_destroy_callback(uint8_t *key, const size_t key_size, uint8_t *value, uint8_t *user_data); // iSCSI connection destructor callback for hash map
-void iscsi_connection_destroy(iscsi_connection *conn); // Deallocates all resources acquired by iscsi_connection_create
-
-int iscsi_connection_drop(iscsi_connection *conn, const uint8_t *conn_match, const int all); // Drops all connections based on matching pattern
-void iscsi_connection_schedule(iscsi_connection *conn); // Schedules an iSCSI connection
-
-int32_t iscsi_connection_read(const iscsi_connection *conn, uint8_t *buf, const uint32_t len); // Reads data for the specified iSCSI connection from its TCP socket
-int32_t iscsi_connection_write(const iscsi_connection *conn, uint8_t *buf, const uint32_t len); // Writes data for the specified iSCSI connection to its TCP socket
-int iscsi_connection_handle_scsi_data_in_queued_tasks(iscsi_connection *conn); // This function handles all queued iSCSI SCSI Data In tasks
-
-int iscsi_connection_init_key_value_pairs(iscsi_hashmap *key_value_pairs); // Initializes a key and value pair hash table with default values for an iSCSI connection
-int32_t iscsi_negotiate_key_value_pairs(iscsi_connection *conn, iscsi_hashmap *key_value_pairs, uint8_t *buf, const uint32_t pos, const uint32_t len); // Negotiates all key and value pairs required for session authentication
-int iscsi_connection_copy_key_value_pairs(iscsi_connection *conn); // Copies retrieved key and value pairs into SCSI connection and session structures
-int iscsi_connection_save_incoming_key_value_pairs(iscsi_connection *conn, iscsi_hashmap *key_value_pairs, iscsi_pdu *login_response_pdu, const iscsi_pdu *pdu); // Saves incoming key / value pairs from the client of a login request PDU
-void iscsi_connection_login_response_reject(iscsi_pdu *login_response_pdu, const iscsi_pdu *pdu); // Initializes a rejecting login response packet
-iscsi_pdu *iscsi_connection_pdu_create(iscsi_connection *conn, const uint ahs_len, const int header_digest_size, const uint32_t ds_len, const int data_sigest_size ); // Creates an iSCSI PDU structure used by connections
-void iscsi_connection_pdu_destroy(iscsi_pdu *pdu); // Destroys an iSCSI PDU structure used by connections
-void iscsi_connection_pdu_free(iscsi_connection *conn, iscsi_pdu *pdu); // Frees an iSCSI PDU structure used by using connection callback function
-
-iscsi_bhs_packet *iscsi_connection_pdu_append(iscsi_pdu *pdu, const uint ahs_len, const int header_digest_size, const uint32_t ds_len, const int data_digest_size); // Appends packet data to an iSCSI PDU structure used by connections
-iscsi_ahs_packet *iscsi_connection_pdu_ahs_packet_get(const iscsi_pdu *pdu, const int index); // Retrieves the pointer to an specific AHS packet from an iSCSI PDU by index
-int iscsi_connection_pdu_ahs_packet_count(const iscsi_pdu *pdu); // Counts number of AHS packets of an iSCSI PDU
-
-void iscsi_connection_pdu_digest_header_update(iscsi_header_digest *header_digest, const iscsi_bhs_packet *packet_data, const uint ahs_len); // Calculate and store iSCSI header digest (CRC32C)
-bool iscsi_connection_pdu_digest_header_verify(const iscsi_header_digest *header_digest, const iscsi_bhs_packet *packet_data, const uint ahs_len); // Validates a stored iSCSI header digest (CRC32C) with actual header data
-void iscsi_connection_pdu_digest_data_update(iscsi_data_digest *data_digest, const iscsi_scsi_ds_cmd_data *ds_cmd_data, const uint32_t ds_len); // Calculate iSCSI data digest (CRC32C)
-bool iscsi_connection_pdu_digest_data_verify(const iscsi_data_digest *data_digest, const iscsi_scsi_ds_cmd_data *ds_cmd_data, const uint32_t ds_len); // Validates a stored iSCSI data digest (CRC32C) with actual DataSegment
-
-void iscsi_connection_pdu_ack_remove(iscsi_connection *conn, const uint32_t exp_stat_sn); // Removes an acknowledged PDU from SNACK PDU doubly linked list by ExpStatSN
-
-iscsi_pdu *iscsi_r2t_find_pdu_bhs(iscsi_connection *conn, iscsi_pdu *pdu); // Searches an iSCSI PDU by Basic Header Segment (BHS) in the Ready To Transfer (R2T) active and queued task doubly linked list
-int iscsi_r2t_send(iscsi_connection *conn, iscsi_task *task, uint32_t *r2t_sn, const uint32_t pos, const uint32_t len, const uint32_t target_xfer_tag); // Sends an iSCSI Ready To Transfer Sequence Number (R2TSN) packet to the initiator
-
-int iscsi_connection_read_data(iscsi_connection *conn, int len, void *buf);
-int iscsi_connection_read_iov_data(iscsi_connection *conn, struct iovec *iov, int iov_count);
-void iscsi_connection_pdu_write(iscsi_connection *conn, iscsi_pdu *pdu, iscsi_connection_xfer_complete_callback callback, uint8_t *user_data);
-
-int iscsi_connection_pdu_handle(iscsi_connection *conn); // Handles incoming PDU data, read up to 16 fragments at once
 void iscsi_connection_handle(dnbd3_client_t *client, const dnbd3_request_t *request, const int len); // Handles an iSCSI connection until connection is closed
 
-#ifdef __cplusplus
-}
-#endif
-
 #endif /* DNBD3_ISCSI_H_ */
diff --git a/src/server/net.c b/src/server/net.c
index a279b02..48890df 100644
--- a/src/server/net.c
+++ b/src/server/net.c
@@ -33,6 +33,7 @@
 #include <dnbd3/shared/serialize.h>
 
 #include <assert.h>
+#include <netinet/tcp.h>
 
 #ifdef __linux__
 #include <sys/sendfile.h>
@@ -152,14 +153,43 @@ void net_init()
 	mutex_init( &_clients_lock, LOCK_CLIENT_LIST );
 }
 
+void initClientStruct(dnbd3_client_t *client)
+{
+	mutex_init( &client->lock, LOCK_CLIENT );
+	mutex_init( &client->sendMutex, LOCK_CLIENT_SEND );
+
+	mutex_lock( &client->lock );
+	host_to_string( &client->host, client->hostName, HOSTNAMELEN );
+	client->hostName[HOSTNAMELEN-1] = '\0';
+	mutex_unlock( &client->lock );
+	client->bytesSent = 0;
+	client->relayedCount = 0;
+}
+
 void* net_handleNewConnection(void *clientPtr)
 {
 	dnbd3_client_t * const client = (dnbd3_client_t *)clientPtr;
 	dnbd3_request_t request;
+	dnbd3_cache_map_t *cache = NULL;
 	client->thread = pthread_self();
 
 	// Await data from client. Since this is a fresh connection, we expect data right away
 	sock_setTimeout( client->sock, _clientTimeout );
+	// NODELAY makes sense since we're sending a lot of data
+	int e2 = 1;
+	socklen_t optlen = sizeof(e2);
+	setsockopt( client->sock, IPPROTO_TCP, TCP_NODELAY, (void *)&e2, optlen );
+	// Also increase send buffer
+	if ( getsockopt( client->sock, SOL_SOCKET, SO_SNDBUF, (void *)&e2, &optlen ) == 0 ) {
+#ifdef __linux__
+		// Linux doubles the value to account for overhead, get "real" value
+		e2 /= 2;
+#endif
+		if ( e2 < SERVER_TCP_BUFFER_MIN_SIZE_PAYLOAD ) {
+			e2 = SERVER_TCP_BUFFER_MIN_SIZE_PAYLOAD;
+			setsockopt( client->sock, SOL_SOCKET, SO_SNDBUF, &e2, sizeof(e2) );
+		}
+	}
 	do {
 #ifdef DNBD3_SERVER_AFL
 		const int ret = (int)recv( 0, &request, sizeof(request), MSG_WAITALL );
@@ -178,8 +208,16 @@ void* net_handleNewConnection(void *clientPtr)
 			if ( ((char*)&request)[0] == 'G' || ((char*)&request)[0] == 'P' ) {
 				// Close enough...
 				rpc_sendStatsJson( client->sock, &client->host, &request, ret );
+			} else if ( true /* check opcode ... */ ) {
+				initClientStruct( client );
+				if ( !addToList( client ) ) {
+					freeClientStruct( client );
+					logadd( LOG_WARNING, "Could not add new iSCSI client to list when connecting" );
+				} else {
+					iscsi_connection_handle( client, &request, ret );
+					goto exit_client_cleanup;
+				}
 			} else {
-				iscsi_connection_handle( client, &request, ret );
 				logadd( LOG_DEBUG1, "Magic in client handshake incorrect" );
 			}
 			goto fail_preadd;
@@ -192,26 +230,17 @@ void* net_handleNewConnection(void *clientPtr)
 		}
 	} while (0);
 	// Fully init client struct
-	mutex_init( &client->lock, LOCK_CLIENT );
-	mutex_init( &client->sendMutex, LOCK_CLIENT_SEND );
-
-	mutex_lock( &client->lock );
-	host_to_string( &client->host, client->hostName, HOSTNAMELEN );
-	client->hostName[HOSTNAMELEN-1] = '\0';
-	mutex_unlock( &client->lock );
-	client->bytesSent = 0;
-	client->relayedCount = 0;
+	initClientStruct( client );
 
 	if ( !addToList( client ) ) {
 		freeClientStruct( client );
-		logadd( LOG_WARNING, "Could not add new client to list when connecting" );
-		return NULL;
+		logadd( LOG_WARNING, "Could not add new DNBD3 client to list when connecting" );
+		goto fail_preadd;
 	}
 
 	dnbd3_reply_t reply;
 
 	dnbd3_image_t *image = NULL;
-	dnbd3_cache_map_t *cache = NULL;
 	int image_file = -1;
 
 	int num;
@@ -518,11 +547,11 @@ exit_client_cleanup: ;
 	removeFromList( client );
 	totalBytesSent += client->bytesSent;
 	// Access time, but only if client didn't just probe
-	if ( image != NULL && client->bytesSent > DNBD3_BLOCK_SIZE * 10 ) {
-		mutex_lock( &image->lock );
-		timing_get( &image->atime );
-		image->accessed = true;
-		mutex_unlock( &image->lock );
+	if ( client->image != NULL && client->bytesSent > DNBD3_BLOCK_SIZE * 10 ) {
+		mutex_lock( &client->image->lock );
+		timing_get( &client->image->atime );
+		client->image->accessed = true;
+		mutex_unlock( &client->image->lock );
 	}
 	if ( cache != NULL ) {
 		ref_put( &cache->reference );
@@ -688,7 +717,7 @@ static dnbd3_client_t* freeClientStruct(dnbd3_client_t *client)
 		dnbd3_uplink_t *uplink = ref_get_uplink( &client->image->uplinkref );
 		if ( uplink != NULL ) {
 			if ( client->relayedCount != 0 ) {
-				uplink_removeEntry( uplink, client, &uplinkCallback );
+				uplink_removeEntry( uplink, client );
 			}
 			ref_put( &uplink->reference );
 		}
diff --git a/src/server/sendfile.c b/src/server/sendfile.c
new file mode 100644
index 0000000..9e27238
--- /dev/null
+++ b/src/server/sendfile.c
@@ -0,0 +1,60 @@
+#include "sendfile.h"
+
+#if defined(__linux__)
+#include <sys/sendfile.h>
+#elif defined(__FreeBSD__)
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/uio.h>
+#else
+#error "What platform is this?"
+#endif
+
+#include <errno.h>
+
+bool sendfile_all(const int fd, const int sock, off_t foffset, const size_t bytes)
+{
+	if ( bytes == 0 )
+		return true;
+#ifdef DNBD3_SERVER_AFL
+	errno = 0;
+	return true;
+#elif defined(__linux__)
+	size_t done = 0;
+	int againCount = 0;
+
+	while ( done < bytes ) {
+		const ssize_t sent = sendfile( sock, fd, &foffset, bytes - done );
+		if ( sent == 0 ) // Probably EOF, like with send(), but manpage is not clear :-/
+			return false;
+		if ( sent < 0 ) {
+			if ( errno == EAGAIN || errno == EINTR ) {
+				// Retry once, but give up otherwise - EAGAIN might just be the send timeout
+				if ( ++againCount > 1 )
+					return false;
+				continue;
+			}
+			return false;
+		}
+		done += sent;
+	}
+#elif defined(__FreeBSD__)
+	off_t sent;
+	size_t done = 0;
+	int againCount = 0;
+
+	while ( done < bytes ) {
+		const int ret = sendfile( fd, sock, foffset + done, bytes - done, NULL, &sent, 0 );
+		if ( ret == 0 || errno == EAGAIN || errno == EINTR ) {
+			// Retry once, but give up otherwise - EAGAIN might just be the send timeout
+			if ( sent == 0 && ++againCount > 1 )
+				return false;
+			done += sent;
+			continue;
+		}
+		// Something else went wrong
+		return false;
+	}
+#endif
+	return true;
+}
\ No newline at end of file
diff --git a/src/server/sendfile.h b/src/server/sendfile.h
new file mode 100644
index 0000000..e4cc5b7
--- /dev/null
+++ b/src/server/sendfile.h
@@ -0,0 +1,18 @@
+#ifndef SENDFILE_H_
+#define SENDFILE_H_
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <sys/types.h>
+
+/**
+ * Platform-agnostic wrapper around sendfile, with retry logic.
+ * @param fd file to read from
+ * @param sock socket to write to
+ * @param foffset offset in file to start reading from
+ * @param bytes number of bytes to read/send
+ * @return true on success
+ */
+bool sendfile_all(int fd, int sock, off_t foffset, size_t bytes);
+
+#endif
\ No newline at end of file
diff --git a/src/server/server.c b/src/server/server.c
index 0bbb417..b91e4ce 100644
--- a/src/server/server.c
+++ b/src/server/server.c
@@ -27,7 +27,6 @@
 #include "net.h"
 #include "altservers.h"
 #include "integrity.h"
-#include "iscsi.h"
 #include "threadpool.h"
 #include "rpc.h"
 #include "fuse.h"
@@ -177,10 +176,6 @@ _Noreturn static void dnbd3_cleanup()
 
 	threadpool_waitEmpty();
 
-	// Destroy iSCSI global vector
-	iscsi_destroy();
-	pthread_rwlock_destroy( &iscsi_globvec_rwlock );
-
 	// Clean up images
 	retries = 5;
 	while ( !image_tryFreeAll() && --retries > 0 ) {
@@ -371,11 +366,6 @@ int main(int argc, char *argv[])
 	integrity_init();
 	net_init();
 
-	if ( _iSCSIServer ) {
-		if ( (pthread_rwlock_init( &iscsi_globvec_rwlock, NULL ) != 0) || (iscsi_create() < 0) )
-			return EXIT_FAILURE;
-	}
-
 	uplink_globalsInit();
 	rpc_init();
 	if ( mountDir != NULL && !dfuse_init( "-oallow_other", mountDir ) ) {
diff --git a/src/server/uplink.c b/src/server/uplink.c
index 8a83124..e05d27c 100644
--- a/src/server/uplink.c
+++ b/src/server/uplink.c
@@ -228,12 +228,12 @@ static void freeUplinkStruct(ref *ref)
  * Remove given client from uplink request queue
  * Locks on: uplink.queueLock
  */
-void uplink_removeEntry(dnbd3_uplink_t *uplink, void *data, uplink_callback callback)
+void uplink_removeEntry(dnbd3_uplink_t *uplink, void *data)
 {
 	mutex_lock( &uplink->queueLock );
 	for ( dnbd3_queue_entry_t *it = uplink->queue; it != NULL; it = it->next ) {
 		for ( dnbd3_queue_client_t **cit = &it->clients; *cit != NULL; ) {
-			if ( (**cit).data == data && (**cit).callback == callback ) {
+			if ( (**cit).data == data ) {
 				(*(**cit).callback)( (**cit).data, (**cit).handle, 0, 0, NULL );
 				dnbd3_queue_client_t *entry = *cit;
 				*cit = (**cit).next;
diff --git a/src/server/uplink.h b/src/server/uplink.h
index b6037d6..8d99695 100644
--- a/src/server/uplink.h
+++ b/src/server/uplink.h
@@ -10,7 +10,7 @@ uint64_t uplink_getTotalBytesReceived();
 
 bool uplink_init(dnbd3_image_t *image, int sock, dnbd3_host_t *host, int version);
 
-void uplink_removeEntry(dnbd3_uplink_t *uplink, void *data, uplink_callback callback);
+void uplink_removeEntry(dnbd3_uplink_t *uplink, void *data);
 
 bool uplink_requestClient(dnbd3_client_t *client, uplink_callback callback, uint64_t handle, uint64_t start, uint32_t length, uint8_t hops);