mirror of https://git.ffmpeg.org/ffmpeg.git
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
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/*
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* Copyright (c) 2007 The Libav Project
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "network.h"
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int ff_network_init(void)
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{
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#if HAVE_WINSOCK2_H
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WSADATA wsaData;
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if (WSAStartup(MAKEWORD(1,1), &wsaData))
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return 0;
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#endif
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return 1;
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}
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int ff_network_wait_fd(int fd, int write)
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{
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int ev = write ? POLLOUT : POLLIN;
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struct pollfd p = { .fd = fd, .events = ev, .revents = 0 };
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int ret;
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ret = poll(&p, 1, 100);
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return ret < 0 ? ff_neterrno() : p.revents & (ev | POLLERR | POLLHUP) ? 0 : AVERROR(EAGAIN);
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}
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void ff_network_close(void)
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{
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#if HAVE_WINSOCK2_H
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WSACleanup();
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#endif
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}
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#if HAVE_WINSOCK2_H
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int ff_neterrno(void)
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{
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int err = WSAGetLastError();
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switch (err) {
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case WSAEWOULDBLOCK:
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return AVERROR(EAGAIN);
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case WSAEINTR:
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return AVERROR(EINTR);
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}
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return -err;
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}
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#endif
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int ff_is_multicast_address(struct sockaddr *addr)
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{
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if (addr->sa_family == AF_INET) {
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return IN_MULTICAST(ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr));
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}
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#if HAVE_STRUCT_SOCKADDR_IN6
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if (addr->sa_family == AF_INET6) {
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return IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *)addr)->sin6_addr);
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}
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#endif
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return 0;
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}
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