cosmopolitan/libc/sock/listen.c

46 lines
2.6 KiB
C

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/internal.h"
#include "libc/dce.h"
#include "libc/sock/internal.h"
#include "libc/sock/sock.h"
#include "libc/sysv/errfuns.h"
/**
* Asks system to accept incoming connections on socket.
*
* The socket() and bind() functions need to be called beforehand. Once
* this function is called, accept() is used to wait for connections.
* Using this on connectionless sockets will allow it to receive packets
* on a designated address.
*
* @param backlog <= SOMAXCONN
* @return 0 on success or -1 w/ errno
*/
int listen(int fd, int backlog) {
if (!IsWindows()) {
return listen$sysv(fd, backlog);
} else if (__isfdkind(fd, kFdSocket)) {
return listen$nt(&g_fds.p[fd], backlog);
} else {
return ebadf();
}
}