DOKK / manpages / debian 11 / libowfat-dev / socket_fastopen.3.en
socket_fastopen(3) Library Functions Manual socket_fastopen(3)

socket_fastopen - enable TCP Fast Open on a server-side TCP socket

#include <socket.h>

int socket_fastopen(int s);

socket_fastopen enables TCP Fast Open support on a server-side TCP socket. Call this before socket_listen(). If the platform does not support this functionality, returns -1 and sets errno to ENOPROTOOPT (or ENOSYS if the platform does not define ENOPROTOOPT).

Normally socket_fastopen returns 0. If anything goes wrong, socket_fastopen returns -1, setting errno appropriately.


#include <socket.h>


int s;
char ip[4];
uint16 p;


s = socket_tcp4b();
socket_fastopen(s);
socket_bind4_reuse(s,ip,p);
socket_listen(16);

socket_fastopen_connect4(3), socket_fastopen_connect6(3)