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libowfat/socket/socket_fastopen_connect4.c

25 lines
550 B
C

#include "socket.h"
#ifdef __MINGW32__
#include <windows.h>
#else
#include <sys/types.h>
#include <unistd.h>
#include <sys/socket.h>
#endif
#include <errno.h>
ssize_t socket_fastopen_connect4(int s,const char* ip,uint16 port,const char* buf,size_t len) {
#ifndef MSG_FASTOPEN
int r;
{
#else
int r=socket_send4_flag(s,buf,len,ip,port,MSG_FASTOPEN);
if (r==-1 && errno==ENOTCONN) {
#endif
/* apparently the kernel does not support TCP fast open */
r=socket_connect4(s,ip,port);
if (r==0) return write(s,buf,len);
}
return r;
}