This fixes error handling for BeOS, removing the need for some ifdefs.
[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 <sys/time.h>
25 #include <fcntl.h>
26
27 typedef struct TCPContext {
28 int fd;
29 } TCPContext;
30
31 /* resolve host with also IP address parsing */
32 int resolve_host(struct in_addr *sin_addr, const char *hostname)
33 {
34 struct hostent *hp;
35
36 if ((inet_aton(hostname, sin_addr)) == 0) {
37 hp = gethostbyname(hostname);
38 if (!hp)
39 return -1;
40 memcpy (sin_addr, hp->h_addr, sizeof(struct in_addr));
41 }
42 return 0;
43 }
44
45 /* return non zero if error */
46 static int tcp_open(URLContext *h, const char *uri, int flags)
47 {
48 struct sockaddr_in dest_addr;
49 char hostname[1024], *q;
50 int port, fd = -1;
51 TCPContext *s = NULL;
52 fd_set wfds;
53 int fd_max, ret;
54 struct timeval tv;
55 socklen_t optlen;
56 char proto[1024],path[1024],tmp[1024]; // PETR: protocol and path strings
57
58 url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname),
59 &port, path, sizeof(path), uri); // PETR: use url_split
60 if (strcmp(proto,"tcp")) goto fail; // PETR: check protocol
61 if ((q = strchr(hostname,'@'))) { strcpy(tmp,q+1); strcpy(hostname,tmp); } // PETR: take only the part after '@' for tcp protocol
62
63 s = av_malloc(sizeof(TCPContext));
64 if (!s)
65 return AVERROR(ENOMEM);
66 h->priv_data = s;
67
68 if (port <= 0 || port >= 65536)
69 goto fail;
70
71 dest_addr.sin_family = AF_INET;
72 dest_addr.sin_port = htons(port);
73 if (resolve_host(&dest_addr.sin_addr, hostname) < 0)
74 goto fail;
75
76 fd = socket(PF_INET, SOCK_STREAM, 0);
77 if (fd < 0)
78 goto fail;
79 fcntl(fd, F_SETFL, O_NONBLOCK);
80
81 redo:
82 ret = connect(fd, (struct sockaddr *)&dest_addr,
83 sizeof(dest_addr));
84 if (ret < 0) {
85 if (errno == EINTR)
86 goto redo;
87 if (errno != EINPROGRESS)
88 goto fail;
89
90 /* wait until we are connected or until abort */
91 for(;;) {
92 if (url_interrupt_cb()) {
93 ret = AVERROR(EINTR);
94 goto fail1;
95 }
96 fd_max = fd;
97 FD_ZERO(&wfds);
98 FD_SET(fd, &wfds);
99 tv.tv_sec = 0;
100 tv.tv_usec = 100 * 1000;
101 ret = select(fd_max + 1, NULL, &wfds, NULL, &tv);
102 if (ret > 0 && FD_ISSET(fd, &wfds))
103 break;
104 }
105
106 /* test error */
107 optlen = sizeof(ret);
108 getsockopt (fd, SOL_SOCKET, SO_ERROR, &ret, &optlen);
109 if (ret != 0)
110 goto fail;
111 }
112 s->fd = fd;
113 return 0;
114
115 fail:
116 ret = AVERROR_IO;
117 fail1:
118 if (fd >= 0)
119 closesocket(fd);
120 av_free(s);
121 return ret;
122 }
123
124 static int tcp_read(URLContext *h, uint8_t *buf, int size)
125 {
126 TCPContext *s = h->priv_data;
127 int len, fd_max, ret;
128 fd_set rfds;
129 struct timeval tv;
130
131 for (;;) {
132 if (url_interrupt_cb())
133 return AVERROR(EINTR);
134 fd_max = s->fd;
135 FD_ZERO(&rfds);
136 FD_SET(s->fd, &rfds);
137 tv.tv_sec = 0;
138 tv.tv_usec = 100 * 1000;
139 ret = select(fd_max + 1, &rfds, NULL, NULL, &tv);
140 if (ret > 0 && FD_ISSET(s->fd, &rfds)) {
141 len = recv(s->fd, buf, size, 0);
142 if (len < 0) {
143 if (errno != EINTR && errno != EAGAIN)
144 return AVERROR(errno);
145 } else return len;
146 } else if (ret < 0) {
147 return -1;
148 }
149 }
150 }
151
152 static int tcp_write(URLContext *h, uint8_t *buf, int size)
153 {
154 TCPContext *s = h->priv_data;
155 int ret, size1, fd_max, len;
156 fd_set wfds;
157 struct timeval tv;
158
159 size1 = size;
160 while (size > 0) {
161 if (url_interrupt_cb())
162 return AVERROR(EINTR);
163 fd_max = s->fd;
164 FD_ZERO(&wfds);
165 FD_SET(s->fd, &wfds);
166 tv.tv_sec = 0;
167 tv.tv_usec = 100 * 1000;
168 ret = select(fd_max + 1, NULL, &wfds, NULL, &tv);
169 if (ret > 0 && FD_ISSET(s->fd, &wfds)) {
170 len = send(s->fd, buf, size, 0);
171 if (len < 0) {
172 if (errno != EINTR && errno != EAGAIN)
173 return AVERROR(errno);
174 continue;
175 }
176 size -= len;
177 buf += len;
178 } else if (ret < 0) {
179 return -1;
180 }
181 }
182 return size1 - size;
183 }
184
185 static int tcp_close(URLContext *h)
186 {
187 TCPContext *s = h->priv_data;
188 closesocket(s->fd);
189 av_free(s);
190 return 0;
191 }
192
193 URLProtocol tcp_protocol = {
194 "tcp",
195 tcp_open,
196 tcp_read,
197 tcp_write,
198 NULL, /* seek */
199 tcp_close,
200 };