[BUILD] rewrite CMake build system to track changes of source files

This change restructures the source code directories, separates shared
form non-shared application code and adds CMake dependencies. These
dependencies allow the tracking of changes and trigger a rebuild of
those build targets where changed files are involved.

WARNING: Note that the support of the DNBD3_SERVER_AFL build option is
not supported yet. Thus, the option should be never turned on.

1 files changed, 0 insertions, 157 deletions

diff --git a/src/shared/protocol.h b/src/shared/protocol.h
deleted file mode 100644
index 05fd2bf..0000000
--- a/src/shared/protocol.h
+++ /dev/null
@@ -1,157 +0,0 @@
-#ifndef _PROTOCOL_H_
-#define _PROTOCOL_H_
-
-#include "sockhelper.h"
-
-#include "../types.h"
-#include "../serialize.h"
-
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/uio.h>
-
-// Client tells server that it is another server
-#define FLAGS8_SERVER (1)
-// Client (which is a proxy) tells server that it has background-replication enabled
-#define FLAGS8_BG_REP (2)
-
-// 2017-10-16: We now support hop-counting, macro to pass hop count conditinally to a function
-#define COND_HOPCOUNT(vers,hopcount) ( (vers) >= 3 ? (hopcount) : 0 )
-
-// 2017-11-02: Macro to set flags in select image message properly if we're a server, as BG_REP depends on global var
-#define SI_SERVER_FLAGS ( (uint8_t)( (_pretendClient ? 0 : FLAGS8_SERVER) | (_backgroundReplication == BGR_FULL ? FLAGS8_BG_REP : 0) ) )
-
-#define REPLY_OK (0)
-#define REPLY_ERRNO (-1)
-#define REPLY_AGAIN (-2)
-#define REPLY_INTR (-3)
-#define REPLY_CLOSED (-4)
-#define REPLY_INCOMPLETE (-5)
-#define REPLY_WRONGMAGIC (-6)
-
-static inline int dnbd3_read_reply(int sock, dnbd3_reply_t *reply, bool wait)
-{
-	ssize_t ret = recv( sock, reply, sizeof(*reply), (wait ? MSG_WAITALL : MSG_DONTWAIT) | MSG_NOSIGNAL );
-	if ( ret == 0 ) return REPLY_CLOSED;
-	if ( ret < 0 ) {
-		if ( errno == EAGAIN || errno == EWOULDBLOCK ) return REPLY_AGAIN;
-		if ( errno == EINTR ) return REPLY_INTR;
-		return REPLY_ERRNO;
-	}
-	if ( !wait && ret != sizeof(*reply) ) ret += recv( sock, ((char*)reply) + ret, sizeof(*reply) - ret, MSG_WAITALL | MSG_NOSIGNAL );
-	if ( ret != sizeof(*reply) ) return REPLY_INCOMPLETE;
-	fixup_reply( *reply );
-	if ( reply->magic != dnbd3_packet_magic ) return REPLY_WRONGMAGIC;
-	return REPLY_OK;
-}
-
-static inline bool dnbd3_get_reply(int sock, dnbd3_reply_t *reply)
-{
-	int ret;
-	do {
-		ret = dnbd3_read_reply( sock, reply, true );
-	} while ( ret == REPLY_INTR );
-	return ret == REPLY_OK;
-}
-
-static inline bool dnbd3_select_image(int sock, const char *name, uint16_t rid, uint8_t flags8)
-{
-	serialized_buffer_t serialized;
-	dnbd3_request_t request;
-	struct iovec iov[2];
-	serializer_reset_write( &serialized );
-	serializer_put_uint16( &serialized, PROTOCOL_VERSION );
-	serializer_put_string( &serialized, name );
-	serializer_put_uint16( &serialized, rid );
-	serializer_put_uint8( &serialized, flags8 );
-	const ssize_t len = serializer_get_written_length( &serialized );
-	request.magic = dnbd3_packet_magic;
-	request.cmd = CMD_SELECT_IMAGE;
-	request.size = (uint32_t)len;
-	request.handle = 0;
-	request.offset = 0;
-	fixup_request( request );
-	iov[0].iov_base = &request;
-	iov[0].iov_len = sizeof(request);
-	iov[1].iov_base = &serialized;
-	iov[1].iov_len = len;
-	ssize_t ret;
-	do {
-		ret = writev( sock, iov, 2 );
-	} while ( ret == -1 && errno == EINTR );
-	return ret == len + (ssize_t)sizeof(request);
-}
-
-static inline bool dnbd3_get_block(int sock, uint64_t offset, uint32_t size, uint64_t handle, uint8_t hopCount)
-{
-	dnbd3_request_t request;
-	request.magic = dnbd3_packet_magic;
-	request.handle = handle;
-	request.cmd = CMD_GET_BLOCK;
-	// When writing before "fixup", we can get away with assigning to offset instead of offset_small if we
-	// do it before assigning to .hops. Faster on 64bit machines (so, on everything)
-	request.offset = offset;
-	request.hops = hopCount;
-	request.size = size;
-	fixup_request( request );
-	return sock_sendAll( sock, &request, sizeof(request), 2 ) == (ssize_t)sizeof(request);
-}
-
-static inline bool dnbd3_get_crc32(int sock, uint32_t *master, void *buffer, size_t *bufferLen)
-{
-	dnbd3_request_t request;
-	dnbd3_reply_t reply;
-	request.magic = dnbd3_packet_magic;
-	request.handle = 0;
-	request.cmd = CMD_GET_CRC32;
-	request.offset = 0;
-	request.size = 0;
-	fixup_request( request );
-	if ( sock_sendAll( sock, &request, sizeof(request), 2 ) != (ssize_t)sizeof(request) ) return false;
-	if ( !dnbd3_get_reply( sock, &reply ) ) return false;
-	if ( reply.size == 0 ) {
-		*bufferLen = 0;
-		return true;
-	}
-	if ( reply.size < 4 ) return false;
-	reply.size -= 4;
-	if ( reply.cmd != CMD_GET_CRC32 || reply.size > *bufferLen ) return false;
-	*bufferLen = reply.size;
-	if ( sock_recv( sock, master, sizeof(uint32_t) ) != (ssize_t)sizeof(uint32_t) ) return false;
-	return sock_recv( sock, buffer, reply.size ) == (ssize_t)reply.size;
-}
-
-/**
- * Pass a full serialized_buffer_t and a socket fd. Parsed data will be returned in further arguments.
- * Note that all strings will point into the passed buffer, so there's no need to free them.
- * This function will also read the header for you, as this message can only occur during connection,
- * where no unrequested messages could arrive inbetween.
- */
-static inline bool dnbd3_select_image_reply(serialized_buffer_t *buffer, int sock, uint16_t *protocol_version, char **name, uint16_t *rid,
-		uint64_t *imageSize)
-{
-	errno = 0;
-	dnbd3_reply_t reply;
-	if ( !dnbd3_get_reply( sock, &reply ) ) {
-		return false;
-	}
-	errno = 0;
-	if ( reply.cmd != CMD_SELECT_IMAGE || reply.size < 3 || reply.size > MAX_PAYLOAD ) {
-		return false;
-	}
-	// receive reply payload
-	ssize_t ret = sock_recv( sock, buffer, reply.size );
-	if ( ret != (ssize_t)reply.size ) {
-		return false;
-	}
-	// handle/check reply payload
-	serializer_reset_read( buffer, reply.size );
-	*protocol_version = serializer_get_uint16( buffer );
-	*name = serializer_get_string( buffer );
-	*rid = serializer_get_uint16( buffer );
-	*imageSize = serializer_get_uint64( buffer );
-	return true;
-}
-
-#endif