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.TH socket_fastopen 3
.SH NAME
socket_fastopen \- enable TCP Fast Open on a server-side TCP socket
.SH SYNTAX
.B #include <libowfat/socket.h>
int \fBsocket_fastopen\fP(int \fIs\fR);
.SH DESCRIPTION
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.
.SH EXAMPLE
#include <libowfat/socket.h>
int \fIs\fR;
char \fIip\fR[4];
uint16 \fIp\fR;
\fIs\fR = socket_tcp4b();
socket_fastopen(s);
socket_bind4_reuse(s,ip,p);
socket_listen(16);
.SH "SEE ALSO"
socket_fastopen_connect4(3), socket_fastopen_connect6(3)