Imported Debian version 2.5.2~trusty
[deb_ffmpeg.git] / ffmpeg / libavformat / tcp.c
... / ...
CommitLineData
1/*
2 * TCP protocol
3 * Copyright (c) 2002 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21#include "avformat.h"
22#include "libavutil/parseutils.h"
23#include "libavutil/opt.h"
24#include "libavutil/time.h"
25
26#include "internal.h"
27#include "network.h"
28#include "os_support.h"
29#include "url.h"
30#if HAVE_POLL_H
31#include <poll.h>
32#endif
33
34typedef struct TCPContext {
35 const AVClass *class;
36 int fd;
37 int listen;
38 int open_timeout;
39 int rw_timeout;
40 int listen_timeout;
41} TCPContext;
42
43#define OFFSET(x) offsetof(TCPContext, x)
44#define D AV_OPT_FLAG_DECODING_PARAM
45#define E AV_OPT_FLAG_ENCODING_PARAM
46static const AVOption options[] = {
47 { "listen", "Listen for incoming connections", OFFSET(listen), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, .flags = D|E },
48 { "timeout", "set timeout (in microseconds) of socket I/O operations", OFFSET(rw_timeout), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
49 { "listen_timeout", "Connection awaiting timeout", OFFSET(listen_timeout), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
50 { NULL }
51};
52
53static const AVClass tcp_class = {
54 .class_name = "tcp",
55 .item_name = av_default_item_name,
56 .option = options,
57 .version = LIBAVUTIL_VERSION_INT,
58};
59
60/* return non zero if error */
61static int tcp_open(URLContext *h, const char *uri, int flags)
62{
63 struct addrinfo hints = { 0 }, *ai, *cur_ai;
64 int port, fd = -1;
65 TCPContext *s = h->priv_data;
66 const char *p;
67 char buf[256];
68 int ret;
69 char hostname[1024],proto[1024],path[1024];
70 char portstr[10];
71 s->open_timeout = 5000000;
72
73 av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname),
74 &port, path, sizeof(path), uri);
75 if (strcmp(proto, "tcp"))
76 return AVERROR(EINVAL);
77 if (port <= 0 || port >= 65536) {
78 av_log(h, AV_LOG_ERROR, "Port missing in uri\n");
79 return AVERROR(EINVAL);
80 }
81 p = strchr(uri, '?');
82 if (p) {
83 if (av_find_info_tag(buf, sizeof(buf), "listen", p)) {
84 char *endptr = NULL;
85 s->listen = strtol(buf, &endptr, 10);
86 /* assume if no digits were found it is a request to enable it */
87 if (buf == endptr)
88 s->listen = 1;
89 }
90 if (av_find_info_tag(buf, sizeof(buf), "timeout", p)) {
91 s->rw_timeout = strtol(buf, NULL, 10);
92 }
93 if (av_find_info_tag(buf, sizeof(buf), "listen_timeout", p)) {
94 s->listen_timeout = strtol(buf, NULL, 10);
95 }
96 }
97 if (s->rw_timeout >= 0) {
98 s->open_timeout =
99 h->rw_timeout = s->rw_timeout;
100 }
101 hints.ai_family = AF_UNSPEC;
102 hints.ai_socktype = SOCK_STREAM;
103 snprintf(portstr, sizeof(portstr), "%d", port);
104 if (s->listen)
105 hints.ai_flags |= AI_PASSIVE;
106 if (!hostname[0])
107 ret = getaddrinfo(NULL, portstr, &hints, &ai);
108 else
109 ret = getaddrinfo(hostname, portstr, &hints, &ai);
110 if (ret) {
111 av_log(h, AV_LOG_ERROR,
112 "Failed to resolve hostname %s: %s\n",
113 hostname, gai_strerror(ret));
114 return AVERROR(EIO);
115 }
116
117 cur_ai = ai;
118
119 restart:
120 fd = ff_socket(cur_ai->ai_family,
121 cur_ai->ai_socktype,
122 cur_ai->ai_protocol);
123 if (fd < 0) {
124 ret = ff_neterrno();
125 goto fail;
126 }
127
128 if (s->listen) {
129 if ((fd = ff_listen_bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen,
130 s->listen_timeout, h)) < 0) {
131 ret = fd;
132 goto fail1;
133 }
134 } else {
135 if ((ret = ff_listen_connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen,
136 s->open_timeout / 1000, h, !!cur_ai->ai_next)) < 0) {
137
138 if (ret == AVERROR_EXIT)
139 goto fail1;
140 else
141 goto fail;
142 }
143 }
144
145 h->is_streamed = 1;
146 s->fd = fd;
147 freeaddrinfo(ai);
148 return 0;
149
150 fail:
151 if (cur_ai->ai_next) {
152 /* Retry with the next sockaddr */
153 cur_ai = cur_ai->ai_next;
154 if (fd >= 0)
155 closesocket(fd);
156 ret = 0;
157 goto restart;
158 }
159 fail1:
160 if (fd >= 0)
161 closesocket(fd);
162 freeaddrinfo(ai);
163 return ret;
164}
165
166static int tcp_read(URLContext *h, uint8_t *buf, int size)
167{
168 TCPContext *s = h->priv_data;
169 int ret;
170
171 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
172 ret = ff_network_wait_fd_timeout(s->fd, 0, h->rw_timeout, &h->interrupt_callback);
173 if (ret)
174 return ret;
175 }
176 ret = recv(s->fd, buf, size, 0);
177 return ret < 0 ? ff_neterrno() : ret;
178}
179
180static int tcp_write(URLContext *h, const uint8_t *buf, int size)
181{
182 TCPContext *s = h->priv_data;
183 int ret;
184
185 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
186 ret = ff_network_wait_fd_timeout(s->fd, 1, h->rw_timeout, &h->interrupt_callback);
187 if (ret)
188 return ret;
189 }
190 ret = send(s->fd, buf, size, MSG_NOSIGNAL);
191 return ret < 0 ? ff_neterrno() : ret;
192}
193
194static int tcp_shutdown(URLContext *h, int flags)
195{
196 TCPContext *s = h->priv_data;
197 int how;
198
199 if (flags & AVIO_FLAG_WRITE && flags & AVIO_FLAG_READ) {
200 how = SHUT_RDWR;
201 } else if (flags & AVIO_FLAG_WRITE) {
202 how = SHUT_WR;
203 } else {
204 how = SHUT_RD;
205 }
206
207 return shutdown(s->fd, how);
208}
209
210static int tcp_close(URLContext *h)
211{
212 TCPContext *s = h->priv_data;
213 closesocket(s->fd);
214 return 0;
215}
216
217static int tcp_get_file_handle(URLContext *h)
218{
219 TCPContext *s = h->priv_data;
220 return s->fd;
221}
222
223URLProtocol ff_tcp_protocol = {
224 .name = "tcp",
225 .url_open = tcp_open,
226 .url_read = tcp_read,
227 .url_write = tcp_write,
228 .url_close = tcp_close,
229 .url_get_file_handle = tcp_get_file_handle,
230 .url_shutdown = tcp_shutdown,
231 .priv_data_size = sizeof(TCPContext),
232 .flags = URL_PROTOCOL_FLAG_NETWORK,
233 .priv_data_class = &tcp_class,
234};