3 * Copyright (c) 2002 Fabrice Bellard
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; 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"
27 #include "os_support.h"
33 typedef struct TCPContext {
41 #define OFFSET(x) offsetof(TCPContext, x)
42 #define D AV_OPT_FLAG_DECODING_PARAM
43 #define E AV_OPT_FLAG_ENCODING_PARAM
44 static const AVOption options[] = {
45 { "listen", "Listen for incoming connections", OFFSET(listen), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, .flags = D|E },
46 { "timeout", "Connection timeout (in milliseconds)", OFFSET(timeout), AV_OPT_TYPE_INT, { .i64 = 10000 }, INT_MIN, INT_MAX, .flags = D|E },
47 { "listen_timeout", "Bind timeout (in milliseconds)", OFFSET(listen_timeout), AV_OPT_TYPE_INT, { .i64 = -1 }, INT_MIN, INT_MAX, .flags = D|E },
51 static const AVClass tcp_class = {
53 .item_name = av_default_item_name,
55 .version = LIBAVUTIL_VERSION_INT,
58 /* return non zero if error */
59 static int tcp_open(URLContext *h, const char *uri, int flags)
61 struct addrinfo hints = { 0 }, *ai, *cur_ai;
63 TCPContext *s = h->priv_data;
67 char hostname[1024],proto[1024],path[1024];
70 av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname),
71 &port, path, sizeof(path), uri);
72 if (strcmp(proto, "tcp"))
73 return AVERROR(EINVAL);
74 if (port <= 0 || port >= 65536) {
75 av_log(h, AV_LOG_ERROR, "Port missing in uri\n");
76 return AVERROR(EINVAL);
80 if (av_find_info_tag(buf, sizeof(buf), "listen", p))
82 if (av_find_info_tag(buf, sizeof(buf), "timeout", p)) {
83 s->timeout = strtol(buf, NULL, 10) * 100;
85 if (av_find_info_tag(buf, sizeof(buf), "listen_timeout", p)) {
86 s->listen_timeout = strtol(buf, NULL, 10);
89 hints.ai_family = AF_UNSPEC;
90 hints.ai_socktype = SOCK_STREAM;
91 snprintf(portstr, sizeof(portstr), "%d", port);
93 hints.ai_flags |= AI_PASSIVE;
95 ret = getaddrinfo(NULL, portstr, &hints, &ai);
97 ret = getaddrinfo(hostname, portstr, &hints, &ai);
99 av_log(h, AV_LOG_ERROR,
100 "Failed to resolve hostname %s: %s\n",
101 hostname, gai_strerror(ret));
108 fd = ff_socket(cur_ai->ai_family,
110 cur_ai->ai_protocol);
117 if ((ret = ff_listen_bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen,
118 s->listen_timeout, h)) < 0) {
123 if ((ret = ff_listen_connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen,
124 s->timeout, h, !!cur_ai->ai_next)) < 0) {
126 if (ret == AVERROR_EXIT)
139 if (cur_ai->ai_next) {
140 /* Retry with the next sockaddr */
141 cur_ai = cur_ai->ai_next;
154 static int tcp_read(URLContext *h, uint8_t *buf, int size)
156 TCPContext *s = h->priv_data;
159 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
160 ret = ff_network_wait_fd(s->fd, 0);
164 ret = recv(s->fd, buf, size, 0);
165 return ret < 0 ? ff_neterrno() : ret;
168 static int tcp_write(URLContext *h, const uint8_t *buf, int size)
170 TCPContext *s = h->priv_data;
173 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
174 ret = ff_network_wait_fd(s->fd, 1);
178 ret = send(s->fd, buf, size, MSG_NOSIGNAL);
179 return ret < 0 ? ff_neterrno() : ret;
182 static int tcp_shutdown(URLContext *h, int flags)
184 TCPContext *s = h->priv_data;
187 if (flags & AVIO_FLAG_WRITE && flags & AVIO_FLAG_READ) {
189 } else if (flags & AVIO_FLAG_WRITE) {
195 return shutdown(s->fd, how);
198 static int tcp_close(URLContext *h)
200 TCPContext *s = h->priv_data;
205 static int tcp_get_file_handle(URLContext *h)
207 TCPContext *s = h->priv_data;
211 URLProtocol ff_tcp_protocol = {
213 .url_open = tcp_open,
214 .url_read = tcp_read,
215 .url_write = tcp_write,
216 .url_close = tcp_close,
217 .url_get_file_handle = tcp_get_file_handle,
218 .url_shutdown = tcp_shutdown,
219 .priv_data_size = sizeof(TCPContext),
220 .flags = URL_PROTOCOL_FLAG_NETWORK,
221 .priv_data_class = &tcp_class,