9191960ca79def88936798efca648709a247a0ee
[libav.git] / libavformat / tcp.c
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 <unistd.h>
23 #include "network.h"
24 #include "os_support.h"
25 #include <sys/time.h>
26
27 typedef struct TCPContext {
28 int fd;
29 } TCPContext;
30
31 /* return non zero if error */
32 static int tcp_open(URLContext *h, const char *uri, int flags)
33 {
34 struct sockaddr_in dest_addr;
35 char hostname[1024], *q;
36 int port, fd = -1;
37 TCPContext *s = NULL;
38 fd_set wfds;
39 int fd_max, ret;
40 struct timeval tv;
41 socklen_t optlen;
42 char proto[1024],path[1024],tmp[1024];
43
44 if(!ff_network_init())
45 return AVERROR(EIO);
46
47 url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname),
48 &port, path, sizeof(path), uri);
49 if (strcmp(proto,"tcp")) goto fail;
50 if ((q = strchr(hostname,'@'))) { strcpy(tmp,q+1); strcpy(hostname,tmp); }
51
52 s = av_malloc(sizeof(TCPContext));
53 if (!s)
54 return AVERROR(ENOMEM);
55 h->priv_data = s;
56 h->is_streamed = 1;
57
58 if (port <= 0 || port >= 65536)
59 goto fail;
60
61 dest_addr.sin_family = AF_INET;
62 dest_addr.sin_port = htons(port);
63 if (resolve_host(&dest_addr.sin_addr, hostname) < 0)
64 goto fail;
65
66 fd = socket(AF_INET, SOCK_STREAM, 0);
67 if (fd < 0)
68 goto fail;
69 ff_socket_nonblock(fd, 1);
70
71 redo:
72 ret = connect(fd, (struct sockaddr *)&dest_addr,
73 sizeof(dest_addr));
74 if (ret < 0) {
75 if (ff_neterrno() == FF_NETERROR(EINTR))
76 goto redo;
77 if (ff_neterrno() != FF_NETERROR(EINPROGRESS) &&
78 ff_neterrno() != FF_NETERROR(EAGAIN))
79 goto fail;
80
81 /* wait until we are connected or until abort */
82 for(;;) {
83 if (url_interrupt_cb()) {
84 ret = AVERROR(EINTR);
85 goto fail1;
86 }
87 fd_max = fd;
88 FD_ZERO(&wfds);
89 FD_SET(fd, &wfds);
90 tv.tv_sec = 0;
91 tv.tv_usec = 100 * 1000;
92 ret = select(fd_max + 1, NULL, &wfds, NULL, &tv);
93 if (ret > 0 && FD_ISSET(fd, &wfds))
94 break;
95 }
96
97 /* test error */
98 optlen = sizeof(ret);
99 getsockopt (fd, SOL_SOCKET, SO_ERROR, &ret, &optlen);
100 if (ret != 0)
101 goto fail;
102 }
103 s->fd = fd;
104 return 0;
105
106 fail:
107 ret = AVERROR(EIO);
108 fail1:
109 if (fd >= 0)
110 closesocket(fd);
111 av_free(s);
112 return ret;
113 }
114
115 static int tcp_read(URLContext *h, uint8_t *buf, int size)
116 {
117 TCPContext *s = h->priv_data;
118 int len, fd_max, ret;
119 fd_set rfds;
120 struct timeval tv;
121
122 for (;;) {
123 if (url_interrupt_cb())
124 return AVERROR(EINTR);
125 fd_max = s->fd;
126 FD_ZERO(&rfds);
127 FD_SET(s->fd, &rfds);
128 tv.tv_sec = 0;
129 tv.tv_usec = 100 * 1000;
130 ret = select(fd_max + 1, &rfds, NULL, NULL, &tv);
131 if (ret > 0 && FD_ISSET(s->fd, &rfds)) {
132 len = recv(s->fd, buf, size, 0);
133 if (len < 0) {
134 if (ff_neterrno() != FF_NETERROR(EINTR) &&
135 ff_neterrno() != FF_NETERROR(EAGAIN))
136 return AVERROR(errno);
137 } else return len;
138 } else if (ret < 0) {
139 return -1;
140 }
141 }
142 }
143
144 static int tcp_write(URLContext *h, uint8_t *buf, int size)
145 {
146 TCPContext *s = h->priv_data;
147 int ret, size1, fd_max, len;
148 fd_set wfds;
149 struct timeval tv;
150
151 size1 = size;
152 while (size > 0) {
153 if (url_interrupt_cb())
154 return AVERROR(EINTR);
155 fd_max = s->fd;
156 FD_ZERO(&wfds);
157 FD_SET(s->fd, &wfds);
158 tv.tv_sec = 0;
159 tv.tv_usec = 100 * 1000;
160 ret = select(fd_max + 1, NULL, &wfds, NULL, &tv);
161 if (ret > 0 && FD_ISSET(s->fd, &wfds)) {
162 len = send(s->fd, buf, size, 0);
163 if (len < 0) {
164 if (ff_neterrno() != FF_NETERROR(EINTR) &&
165 ff_neterrno() != FF_NETERROR(EAGAIN))
166 return AVERROR(errno);
167 continue;
168 }
169 size -= len;
170 buf += len;
171 } else if (ret < 0) {
172 return -1;
173 }
174 }
175 return size1 - size;
176 }
177
178 static int tcp_close(URLContext *h)
179 {
180 TCPContext *s = h->priv_data;
181 closesocket(s->fd);
182 ff_network_close();
183 av_free(s);
184 return 0;
185 }
186
187 URLProtocol tcp_protocol = {
188 "tcp",
189 tcp_open,
190 tcp_read,
191 tcp_write,
192 NULL, /* seek */
193 tcp_close,
194 };