3 * Copyright (c) 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/parseutils.h"
23 #include "libavutil/opt.h"
26 #include "os_support.h"
32 typedef struct TCPContext {
40 #define OFFSET(x) offsetof(TCPContext, x)
41 #define D AV_OPT_FLAG_DECODING_PARAM
42 #define E AV_OPT_FLAG_ENCODING_PARAM
43 static const AVOption options[] = {
44 {"listen", "listen on port instead of connecting", OFFSET(listen), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E },
45 {"timeout", "timeout of socket i/o operations", OFFSET(rw_timeout), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D|E },
46 {"listen_timeout", "connection awaiting timeout", OFFSET(listen_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, D|E },
50 static const AVClass tcp_context_class = {
52 .item_name = av_default_item_name,
54 .version = LIBAVUTIL_VERSION_INT,
57 /* return non zero if error */
58 static int tcp_open(URLContext *h, const char *uri, int flags)
60 struct addrinfo hints = { 0 }, *ai, *cur_ai;
62 TCPContext *s = h->priv_data;
67 char hostname[1024],proto[1024],path[1024];
69 h->rw_timeout = 5000000;
71 av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname),
72 &port, path, sizeof(path), uri);
73 if (strcmp(proto, "tcp"))
74 return AVERROR(EINVAL);
75 if (port <= 0 || port >= 65536) {
76 av_log(h, AV_LOG_ERROR, "Port missing in uri\n");
77 return AVERROR(EINVAL);
81 if (av_find_info_tag(buf, sizeof(buf), "listen", p))
83 if (av_find_info_tag(buf, sizeof(buf), "timeout", p)) {
84 s->rw_timeout = strtol(buf, NULL, 10);
86 if (av_find_info_tag(buf, sizeof(buf), "listen_timeout", p)) {
87 s->listen_timeout = strtol(buf, NULL, 10);
90 h->rw_timeout = s->rw_timeout;
91 hints.ai_family = AF_UNSPEC;
92 hints.ai_socktype = SOCK_STREAM;
93 snprintf(portstr, sizeof(portstr), "%d", port);
95 hints.ai_flags |= AI_PASSIVE;
97 ret = getaddrinfo(NULL, portstr, &hints, &ai);
99 ret = getaddrinfo(hostname, portstr, &hints, &ai);
101 av_log(h, AV_LOG_ERROR,
102 "Failed to resolve hostname %s: %s\n",
103 hostname, gai_strerror(ret));
111 fd = socket(cur_ai->ai_family, cur_ai->ai_socktype, cur_ai->ai_protocol);
118 struct pollfd lp = { fd, POLLIN, 0 };
119 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse));
120 ret = bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen);
130 ret = poll(&lp, 1, s->listen_timeout >= 0 ? s->listen_timeout : -1);
132 ret = AVERROR(ETIMEDOUT);
135 fd1 = accept(fd, NULL, NULL);
142 ff_socket_nonblock(fd, 1);
145 ff_socket_nonblock(fd, 1);
146 ret = connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen);
150 struct pollfd p = {fd, POLLOUT, 0};
151 int64_t wait_started;
153 if (ret == AVERROR(EINTR)) {
154 if (ff_check_interrupt(&h->interrupt_callback)) {
160 if (ret != AVERROR(EINPROGRESS) &&
161 ret != AVERROR(EAGAIN))
164 /* wait until we are connected or until abort */
165 wait_started = av_gettime();
167 if (ff_check_interrupt(&h->interrupt_callback)) {
171 ret = poll(&p, 1, 100);
174 } while (!h->rw_timeout || (av_gettime() - wait_started < h->rw_timeout));
176 ret = AVERROR(ETIMEDOUT);
180 optlen = sizeof(ret);
181 if (getsockopt (fd, SOL_SOCKET, SO_ERROR, &ret, &optlen))
182 ret = AVUNERROR(ff_neterrno());
186 av_strerror(ret, errbuf, sizeof(errbuf));
187 av_log(h, AV_LOG_ERROR,
188 "TCP connection to %s:%d failed: %s\n",
189 hostname, port, errbuf);
199 if (cur_ai->ai_next) {
200 /* Retry with the next sockaddr */
201 cur_ai = cur_ai->ai_next;
213 static int tcp_read(URLContext *h, uint8_t *buf, int size)
215 TCPContext *s = h->priv_data;
218 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
219 ret = ff_network_wait_fd_timeout(s->fd, 0, h->rw_timeout, &h->interrupt_callback);
223 ret = recv(s->fd, buf, size, 0);
224 return ret < 0 ? ff_neterrno() : ret;
227 static int tcp_write(URLContext *h, const uint8_t *buf, int size)
229 TCPContext *s = h->priv_data;
232 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
233 ret = ff_network_wait_fd_timeout(s->fd, 1, h->rw_timeout, &h->interrupt_callback);
237 ret = send(s->fd, buf, size, 0);
238 return ret < 0 ? ff_neterrno() : ret;
241 static int tcp_shutdown(URLContext *h, int flags)
243 TCPContext *s = h->priv_data;
246 if (flags & AVIO_FLAG_WRITE && flags & AVIO_FLAG_READ) {
248 } else if (flags & AVIO_FLAG_WRITE) {
254 return shutdown(s->fd, how);
257 static int tcp_close(URLContext *h)
259 TCPContext *s = h->priv_data;
264 static int tcp_get_file_handle(URLContext *h)
266 TCPContext *s = h->priv_data;
270 URLProtocol ff_tcp_protocol = {
272 .url_open = tcp_open,
273 .url_read = tcp_read,
274 .url_write = tcp_write,
275 .url_close = tcp_close,
276 .url_get_file_handle = tcp_get_file_handle,
277 .url_shutdown = tcp_shutdown,
278 .priv_data_size = sizeof(TCPContext),
279 .priv_data_class = &tcp_context_class,
280 .flags = URL_PROTOCOL_FLAG_NETWORK,