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https://github.com/xenia-project/FFmpeg.git
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f9a9a14862
Without this patch a user a bit absent-minded may not notice that the connection doesn't work because the port is missing. Signed-off-by: Martin Storsjö <martin@martin.st>
257 lines
6.9 KiB
C
257 lines
6.9 KiB
C
/*
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* TCP protocol
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* Copyright (c) 2002 Fabrice Bellard
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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 "avformat.h"
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#include "libavutil/parseutils.h"
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#include "internal.h"
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#include "network.h"
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#include "os_support.h"
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#include "url.h"
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#if HAVE_POLL_H
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#include <poll.h>
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#endif
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typedef struct TCPContext {
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int fd;
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} TCPContext;
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/* return non zero if error */
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static int tcp_open(URLContext *h, const char *uri, int flags)
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{
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struct addrinfo hints = { 0 }, *ai, *cur_ai;
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int port, fd = -1;
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TCPContext *s = h->priv_data;
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int listen_socket = 0;
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const char *p;
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char buf[256];
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int ret;
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socklen_t optlen;
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int timeout = 100, listen_timeout = -1;
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char hostname[1024],proto[1024],path[1024];
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char portstr[10];
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av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname),
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&port, path, sizeof(path), uri);
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if (strcmp(proto, "tcp"))
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return AVERROR(EINVAL);
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if (port <= 0 || port >= 65536) {
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av_log(h, AV_LOG_ERROR, "Port missing in uri\n");
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return AVERROR(EINVAL);
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}
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p = strchr(uri, '?');
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if (p) {
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if (av_find_info_tag(buf, sizeof(buf), "listen", p))
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listen_socket = 1;
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if (av_find_info_tag(buf, sizeof(buf), "timeout", p)) {
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timeout = strtol(buf, NULL, 10);
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}
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if (av_find_info_tag(buf, sizeof(buf), "listen_timeout", p)) {
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listen_timeout = strtol(buf, NULL, 10);
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}
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}
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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snprintf(portstr, sizeof(portstr), "%d", port);
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if (listen_socket)
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hints.ai_flags |= AI_PASSIVE;
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if (!hostname[0])
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ret = getaddrinfo(NULL, portstr, &hints, &ai);
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else
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ret = getaddrinfo(hostname, portstr, &hints, &ai);
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if (ret) {
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av_log(h, AV_LOG_ERROR,
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"Failed to resolve hostname %s: %s\n",
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hostname, gai_strerror(ret));
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return AVERROR(EIO);
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}
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cur_ai = ai;
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restart:
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ret = AVERROR(EIO);
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fd = socket(cur_ai->ai_family, cur_ai->ai_socktype, cur_ai->ai_protocol);
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if (fd < 0)
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goto fail;
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if (listen_socket) {
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int fd1;
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int reuse = 1;
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struct pollfd lp = { fd, POLLIN, 0 };
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setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse));
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ret = bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen);
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if (ret) {
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ret = ff_neterrno();
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goto fail1;
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}
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ret = listen(fd, 1);
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if (ret) {
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ret = ff_neterrno();
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goto fail1;
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}
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ret = poll(&lp, 1, listen_timeout >= 0 ? listen_timeout : -1);
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if (ret <= 0) {
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ret = AVERROR(ETIMEDOUT);
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goto fail1;
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}
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fd1 = accept(fd, NULL, NULL);
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if (fd1 < 0) {
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ret = ff_neterrno();
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goto fail1;
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}
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closesocket(fd);
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fd = fd1;
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ff_socket_nonblock(fd, 1);
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} else {
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redo:
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ff_socket_nonblock(fd, 1);
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ret = connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen);
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}
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if (ret < 0) {
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struct pollfd p = {fd, POLLOUT, 0};
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ret = ff_neterrno();
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if (ret == AVERROR(EINTR)) {
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if (ff_check_interrupt(&h->interrupt_callback)) {
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ret = AVERROR_EXIT;
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goto fail1;
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}
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goto redo;
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}
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if (ret != AVERROR(EINPROGRESS) &&
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ret != AVERROR(EAGAIN))
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goto fail;
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/* wait until we are connected or until abort */
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while(timeout--) {
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if (ff_check_interrupt(&h->interrupt_callback)) {
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ret = AVERROR_EXIT;
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goto fail1;
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}
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ret = poll(&p, 1, 100);
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if (ret > 0)
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break;
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}
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if (ret <= 0) {
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ret = AVERROR(ETIMEDOUT);
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goto fail;
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}
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/* test error */
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optlen = sizeof(ret);
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if (getsockopt (fd, SOL_SOCKET, SO_ERROR, &ret, &optlen))
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ret = AVUNERROR(ff_neterrno());
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if (ret != 0) {
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char errbuf[100];
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ret = AVERROR(ret);
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av_strerror(ret, errbuf, sizeof(errbuf));
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av_log(h, AV_LOG_ERROR,
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"TCP connection to %s:%d failed: %s\n",
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hostname, port, errbuf);
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goto fail;
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}
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}
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h->is_streamed = 1;
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s->fd = fd;
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freeaddrinfo(ai);
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return 0;
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fail:
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if (cur_ai->ai_next) {
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/* Retry with the next sockaddr */
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cur_ai = cur_ai->ai_next;
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if (fd >= 0)
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closesocket(fd);
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goto restart;
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}
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fail1:
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if (fd >= 0)
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closesocket(fd);
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freeaddrinfo(ai);
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return ret;
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}
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static int tcp_read(URLContext *h, uint8_t *buf, int size)
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{
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TCPContext *s = h->priv_data;
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int ret;
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if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
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ret = ff_network_wait_fd(s->fd, 0);
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if (ret < 0)
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return ret;
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}
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ret = recv(s->fd, buf, size, 0);
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return ret < 0 ? ff_neterrno() : ret;
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}
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static int tcp_write(URLContext *h, const uint8_t *buf, int size)
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{
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TCPContext *s = h->priv_data;
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int ret;
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if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
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ret = ff_network_wait_fd(s->fd, 1);
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if (ret < 0)
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return ret;
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}
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ret = send(s->fd, buf, size, 0);
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return ret < 0 ? ff_neterrno() : ret;
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}
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static int tcp_shutdown(URLContext *h, int flags)
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{
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TCPContext *s = h->priv_data;
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int how;
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if (flags & AVIO_FLAG_WRITE && flags & AVIO_FLAG_READ) {
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how = SHUT_RDWR;
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} else if (flags & AVIO_FLAG_WRITE) {
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how = SHUT_WR;
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} else {
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how = SHUT_RD;
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}
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return shutdown(s->fd, how);
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}
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static int tcp_close(URLContext *h)
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{
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TCPContext *s = h->priv_data;
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closesocket(s->fd);
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return 0;
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}
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static int tcp_get_file_handle(URLContext *h)
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{
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TCPContext *s = h->priv_data;
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return s->fd;
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}
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URLProtocol ff_tcp_protocol = {
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.name = "tcp",
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.url_open = tcp_open,
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.url_read = tcp_read,
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.url_write = tcp_write,
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.url_close = tcp_close,
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.url_get_file_handle = tcp_get_file_handle,
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.url_shutdown = tcp_shutdown,
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.priv_data_size = sizeof(TCPContext),
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.flags = URL_PROTOCOL_FLAG_NETWORK,
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};
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