54 lines
3.0 KiB
C
54 lines
3.0 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/dce.h"
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#include "libc/sock/internal.h"
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#include "libc/sock/sock.h"
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#include "libc/sysv/consts/af.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Creates new system resource for network communication.
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*
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* @param family can be AF_UNIX, AF_INET, etc.
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* @param type can be SOCK_STREAM (for TCP), SOCK_DGRAM (e.g. UDP), or
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* SOCK_RAW (IP) so long as IP_HDRINCL was passed to setsockopt();
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* and additionally, may be or'd with SOCK_NONBLOCK, SOCK_CLOEXEC
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* @param protocol can be IPPROTO_TCP, IPPROTO_UDP, or IPPROTO_ICMP
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* @return socket file descriptor or -1 w/ errno
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* @error ENETDOWN, EPFNOSUPPORT, etc.
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* @see libc/sysv/consts.sh
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* @asyncsignalsafe
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*/
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int socket(int family, int type, int protocol) {
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if (family == AF_UNSPEC) {
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family = AF_INET;
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} else if (family == AF_INET6) {
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/* Recommend IPv6 on frontend serving infrastructure only. That's
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what Google Cloud does. It's more secure. It also means poll()
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will work on Windows, which doesn't allow mixing third layers. */
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return epfnosupport();
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}
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if (!IsWindows()) {
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return socket$sysv(family, type, protocol);
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} else {
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return socket$nt(family, type, protocol);
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}
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}
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