#ifndef HELPER_H_
#define HELPER_H_
#include "server.h"
#include <netinet/in.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include "../types.h"
#define ERROR_GOTO(jumplabel, errormsg) do { memlogf(errormsg); goto jumplabel; } while (0);
#define ERROR_GOTO_VA(jumplabel, errormsg, ...) do { memlogf(errormsg, __VA_ARGS__); goto jumplabel; } while (0);
char parse_address(char *string, dnbd3_host_t *host);
char host_to_string(const dnbd3_host_t *host, char *target, size_t targetlen);
void strtolower(char *string);
void remove_trailing_slash(char *string);
void trim_right(char * const string);
void setThreadName(char *name);
void blockNoncriticalSignals();
static inline int isSameAddress(const dnbd3_host_t * const a, const dnbd3_host_t * const b)
{
return (a->type == b->type) && (0 == memcmp( a->addr, b->addr, (a->type == AF_INET ? 4 : 16) ));
}
static inline int isSameAddressPort(const dnbd3_host_t * const a, const dnbd3_host_t * const b)
{
return (a->type == b->type) && (a->port == b->port) && (0 == memcmp( a->addr, b->addr, (a->type == AF_INET ? 4 : 16) ));
}
/**
* Send message to client, return !=0 on success, 0 on failure
*/
static inline int send_data(int client_sock, void *data_in, int len)
{
if ( len <= 0 ) // Nothing to send
return 1;
char *data = data_in; // Needed for pointer arithmetic
int ret, i;
for (i = 0; i < 3; ++i) // Retry at most 3 times, each try takes at most 0.5 seconds (socket timeout)
{
ret = send( client_sock, data, len, 0 );
if ( ret == 0 ) // Connection closed
return 0;
if ( ret < 0 ) {
if ( errno != EAGAIN ) // Some unexpected error
return 0;
usleep( 1000 ); // 1ms
continue;
}
len -= ret;
if ( len <= 0 ) // Sent everything
return 1;
data += ret; // move target buffer pointer
}
return 0;
}
/**
* Receive data from client, return !=0 on success, 0 on failure
*/
static inline int recv_data(int client_sock, void *buffer_out, int len)
{
if ( len <= 0 ) // Nothing to receive
return 1;
char *data = buffer_out; // Needed for pointer arithmetic
int ret, i;
for (i = 0; i < 3; ++i) // Retry at most 3 times, each try takes at most 0.5 seconds (socket timeout)
{
ret = recv( client_sock, data, len, MSG_WAITALL );
if ( ret == 0 ) // Connection closed
return 0;
if ( ret < 0 ) {
if ( errno != EAGAIN ) // Some unexpected error
return 0;
usleep( 1000 ); // 1ms
continue;
}
len -= ret;
if ( len <= 0 ) // Received everything
return 1;
data += ret; // move target buffer pointer
}
return 0;
}
static inline int strend(char *string, char *suffix)
{
if ( string == NULL ) return FALSE;
if ( suffix == NULL || *suffix == '\0' ) return TRUE;
const size_t len1 = strlen( string );
const size_t len2 = strlen( suffix );
if ( len2 > len1 ) return FALSE;
return strcmp( string + len1 - len2, suffix ) == 0;
}
#endif
