socket_fastopen(3) 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();