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"
25 #include "os_support.h"
31 typedef struct TCPContext {
35 /* return non zero if error */
36 static int tcp_open(URLContext *h, const char *uri, int flags)
38 struct addrinfo hints = { 0 }, *ai, *cur_ai;
40 TCPContext *s = h->priv_data;
41 int listen_socket = 0;
46 int timeout = 100, listen_timeout = -1;
47 char hostname[1024],proto[1024],path[1024];
50 av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname),
51 &port, path, sizeof(path), uri);
52 if (strcmp(proto,"tcp") || port <= 0 || port >= 65536)
53 return AVERROR(EINVAL);
57 if (av_find_info_tag(buf, sizeof(buf), "listen", p))
59 if (av_find_info_tag(buf, sizeof(buf), "timeout", p)) {
60 timeout = strtol(buf, NULL, 10);
62 if (av_find_info_tag(buf, sizeof(buf), "listen_timeout", p)) {
63 listen_timeout = strtol(buf, NULL, 10);
66 hints.ai_family = AF_UNSPEC;
67 hints.ai_socktype = SOCK_STREAM;
68 snprintf(portstr, sizeof(portstr), "%d", port);
70 hints.ai_flags |= AI_PASSIVE;
72 ret = getaddrinfo(NULL, portstr, &hints, &ai);
74 ret = getaddrinfo(hostname, portstr, &hints, &ai);
76 av_log(h, AV_LOG_ERROR,
77 "Failed to resolve hostname %s: %s\n",
78 hostname, gai_strerror(ret));
86 fd = socket(cur_ai->ai_family, cur_ai->ai_socktype, cur_ai->ai_protocol);
93 struct pollfd lp = { fd, POLLIN, 0 };
94 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse));
95 ret = bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen);
105 ret = poll(&lp, 1, listen_timeout >= 0 ? listen_timeout : -1);
107 ret = AVERROR(ETIMEDOUT);
110 fd1 = accept(fd, NULL, NULL);
117 ff_socket_nonblock(fd, 1);
120 ff_socket_nonblock(fd, 1);
121 ret = connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen);
125 struct pollfd p = {fd, POLLOUT, 0};
127 if (ret == AVERROR(EINTR)) {
128 if (ff_check_interrupt(&h->interrupt_callback)) {
134 if (ret != AVERROR(EINPROGRESS) &&
135 ret != AVERROR(EAGAIN))
138 /* wait until we are connected or until abort */
140 if (ff_check_interrupt(&h->interrupt_callback)) {
144 ret = poll(&p, 1, 100);
149 ret = AVERROR(ETIMEDOUT);
153 optlen = sizeof(ret);
154 if (getsockopt (fd, SOL_SOCKET, SO_ERROR, &ret, &optlen))
155 ret = AVUNERROR(ff_neterrno());
159 av_strerror(ret, errbuf, sizeof(errbuf));
160 av_log(h, AV_LOG_ERROR,
161 "TCP connection to %s:%d failed: %s\n",
162 hostname, port, errbuf);
172 if (cur_ai->ai_next) {
173 /* Retry with the next sockaddr */
174 cur_ai = cur_ai->ai_next;
186 static int tcp_read(URLContext *h, uint8_t *buf, int size)
188 TCPContext *s = h->priv_data;
191 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
192 ret = ff_network_wait_fd(s->fd, 0);
196 ret = recv(s->fd, buf, size, 0);
197 return ret < 0 ? ff_neterrno() : ret;
200 static int tcp_write(URLContext *h, const uint8_t *buf, int size)
202 TCPContext *s = h->priv_data;
205 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
206 ret = ff_network_wait_fd(s->fd, 1);
210 ret = send(s->fd, buf, size, 0);
211 return ret < 0 ? ff_neterrno() : ret;
214 static int tcp_shutdown(URLContext *h, int flags)
216 TCPContext *s = h->priv_data;
219 if (flags & AVIO_FLAG_WRITE && flags & AVIO_FLAG_READ) {
221 } else if (flags & AVIO_FLAG_WRITE) {
227 return shutdown(s->fd, how);
230 static int tcp_close(URLContext *h)
232 TCPContext *s = h->priv_data;
237 static int tcp_get_file_handle(URLContext *h)
239 TCPContext *s = h->priv_data;
243 URLProtocol ff_tcp_protocol = {
245 .url_open = tcp_open,
246 .url_read = tcp_read,
247 .url_write = tcp_write,
248 .url_close = tcp_close,
249 .url_get_file_handle = tcp_get_file_handle,
250 .url_shutdown = tcp_shutdown,
251 .priv_data_size = sizeof(TCPContext),
252 .flags = URL_PROTOCOL_FLAG_NETWORK,