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"
24 #include "libavutil/time.h"
27 #include "os_support.h"
33 typedef struct TCPContext {
42 #define OFFSET(x) offsetof(TCPContext, x)
43 #define D AV_OPT_FLAG_DECODING_PARAM
44 #define E AV_OPT_FLAG_ENCODING_PARAM
45 static const AVOption options[] = {
46 {"listen", "listen on port instead of connecting", OFFSET(listen), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E },
47 {"timeout", "timeout of socket i/o operations", OFFSET(rw_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, D|E },
48 {"listen_timeout", "connection awaiting timeout", OFFSET(listen_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, D|E },
52 static const AVClass tcp_context_class = {
54 .item_name = av_default_item_name,
56 .version = LIBAVUTIL_VERSION_INT,
59 /* return non zero if error */
60 static int tcp_open(URLContext *h, const char *uri, int flags)
62 struct addrinfo hints = { 0 }, *ai, *cur_ai;
64 TCPContext *s = h->priv_data;
68 char hostname[1024],proto[1024],path[1024];
70 s->open_timeout = 5000000;
72 av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname),
73 &port, path, sizeof(path), uri);
74 if (strcmp(proto, "tcp"))
75 return AVERROR(EINVAL);
76 if (port <= 0 || port >= 65536) {
77 av_log(h, AV_LOG_ERROR, "Port missing in uri\n");
78 return AVERROR(EINVAL);
82 if (av_find_info_tag(buf, sizeof(buf), "listen", p))
84 if (av_find_info_tag(buf, sizeof(buf), "timeout", p)) {
85 s->rw_timeout = strtol(buf, NULL, 10);
87 if (av_find_info_tag(buf, sizeof(buf), "listen_timeout", p)) {
88 s->listen_timeout = strtol(buf, NULL, 10);
91 if (s->rw_timeout >= 0) {
93 h->rw_timeout = s->rw_timeout;
95 hints.ai_family = AF_UNSPEC;
96 hints.ai_socktype = SOCK_STREAM;
97 snprintf(portstr, sizeof(portstr), "%d", port);
99 hints.ai_flags |= AI_PASSIVE;
101 ret = getaddrinfo(NULL, portstr, &hints, &ai);
103 ret = getaddrinfo(hostname, portstr, &hints, &ai);
105 av_log(h, AV_LOG_ERROR,
106 "Failed to resolve hostname %s: %s\n",
107 hostname, gai_strerror(ret));
114 fd = ff_socket(cur_ai->ai_family,
116 cur_ai->ai_protocol);
123 if ((fd = ff_listen_bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen,
124 s->listen_timeout, h)) < 0) {
129 if ((ret = ff_listen_connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen,
130 s->open_timeout / 1000, h, !!cur_ai->ai_next)) < 0) {
132 if (ret == AVERROR_EXIT)
145 if (cur_ai->ai_next) {
146 /* Retry with the next sockaddr */
147 cur_ai = cur_ai->ai_next;
160 static int tcp_read(URLContext *h, uint8_t *buf, int size)
162 TCPContext *s = h->priv_data;
165 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
166 ret = ff_network_wait_fd_timeout(s->fd, 0, h->rw_timeout, &h->interrupt_callback);
170 ret = recv(s->fd, buf, size, 0);
171 return ret < 0 ? ff_neterrno() : ret;
174 static int tcp_write(URLContext *h, const uint8_t *buf, int size)
176 TCPContext *s = h->priv_data;
179 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
180 ret = ff_network_wait_fd_timeout(s->fd, 1, h->rw_timeout, &h->interrupt_callback);
184 ret = send(s->fd, buf, size, 0);
185 return ret < 0 ? ff_neterrno() : ret;
188 static int tcp_shutdown(URLContext *h, int flags)
190 TCPContext *s = h->priv_data;
193 if (flags & AVIO_FLAG_WRITE && flags & AVIO_FLAG_READ) {
195 } else if (flags & AVIO_FLAG_WRITE) {
201 return shutdown(s->fd, how);
204 static int tcp_close(URLContext *h)
206 TCPContext *s = h->priv_data;
211 static int tcp_get_file_handle(URLContext *h)
213 TCPContext *s = h->priv_data;
217 URLProtocol ff_tcp_protocol = {
219 .url_open = tcp_open,
220 .url_read = tcp_read,
221 .url_write = tcp_write,
222 .url_close = tcp_close,
223 .url_get_file_handle = tcp_get_file_handle,
224 .url_shutdown = tcp_shutdown,
225 .priv_data_size = sizeof(TCPContext),
226 .priv_data_class = &tcp_context_class,
227 .flags = URL_PROTOCOL_FLAG_NETWORK,