summaryrefslogtreecommitdiff
path: root/libavformat/network.c (plain)
blob: 2fb1c8b02afa7f1baada2aa77be5830001707e0a
1/*
2 * Copyright (c) 2007 The FFmpeg Project
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#include <fcntl.h>
22#include "network.h"
23#include "tls.h"
24#include "url.h"
25#include "libavcodec/internal.h"
26#include "libavutil/avutil.h"
27#include "libavutil/mem.h"
28#include "libavutil/time.h"
29
30int ff_tls_init(void)
31{
32#if CONFIG_TLS_OPENSSL_PROTOCOL
33 int ret;
34 if ((ret = ff_openssl_init()) < 0)
35 return ret;
36#endif
37#if CONFIG_TLS_GNUTLS_PROTOCOL
38 ff_gnutls_init();
39#endif
40 return 0;
41}
42
43void ff_tls_deinit(void)
44{
45#if CONFIG_TLS_OPENSSL_PROTOCOL
46 ff_openssl_deinit();
47#endif
48#if CONFIG_TLS_GNUTLS_PROTOCOL
49 ff_gnutls_deinit();
50#endif
51}
52
53int ff_network_inited_globally;
54
55int ff_network_init(void)
56{
57#if HAVE_WINSOCK2_H
58 WSADATA wsaData;
59#endif
60
61 if (!ff_network_inited_globally)
62 av_log(NULL, AV_LOG_WARNING, "Using network protocols without global "
63 "network initialization. Please use "
64 "avformat_network_init(), this will "
65 "become mandatory later.\n");
66#if HAVE_WINSOCK2_H
67 if (WSAStartup(MAKEWORD(1,1), &wsaData))
68 return 0;
69#endif
70 return 1;
71}
72
73int ff_network_wait_fd(int fd, int write)
74{
75 int ev = write ? POLLOUT : POLLIN;
76 struct pollfd p = { .fd = fd, .events = ev, .revents = 0 };
77 int ret;
78 ret = poll(&p, 1, POLLING_TIME);
79 return ret < 0 ? ff_neterrno() : p.revents & (ev | POLLERR | POLLHUP) ? 0 : AVERROR(EAGAIN);
80}
81
82int ff_network_wait_fd_timeout(int fd, int write, int64_t timeout, AVIOInterruptCB *int_cb)
83{
84 int ret;
85 int64_t wait_start = 0;
86
87 while (1) {
88 if (ff_check_interrupt(int_cb))
89 return AVERROR_EXIT;
90 ret = ff_network_wait_fd(fd, write);
91 if (ret != AVERROR(EAGAIN))
92 return ret;
93 if (timeout > 0) {
94 if (!wait_start)
95 wait_start = av_gettime_relative();
96 else if (av_gettime_relative() - wait_start > timeout)
97 return AVERROR(ETIMEDOUT);
98 }
99 }
100}
101
102void ff_network_close(void)
103{
104#if HAVE_WINSOCK2_H
105 WSACleanup();
106#endif
107}
108
109#if HAVE_WINSOCK2_H
110int ff_neterrno(void)
111{
112 int err = WSAGetLastError();
113 switch (err) {
114 case WSAEWOULDBLOCK:
115 return AVERROR(EAGAIN);
116 case WSAEINTR:
117 return AVERROR(EINTR);
118 case WSAEPROTONOSUPPORT:
119 return AVERROR(EPROTONOSUPPORT);
120 case WSAETIMEDOUT:
121 return AVERROR(ETIMEDOUT);
122 case WSAECONNREFUSED:
123 return AVERROR(ECONNREFUSED);
124 case WSAEINPROGRESS:
125 return AVERROR(EINPROGRESS);
126 }
127 return -err;
128}
129#endif
130
131int ff_is_multicast_address(struct sockaddr *addr)
132{
133 if (addr->sa_family == AF_INET) {
134 return IN_MULTICAST(ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr));
135 }
136#if HAVE_STRUCT_SOCKADDR_IN6
137 if (addr->sa_family == AF_INET6) {
138 return IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *)addr)->sin6_addr);
139 }
140#endif
141
142 return 0;
143}
144
145static int ff_poll_interrupt(struct pollfd *p, nfds_t nfds, int timeout,
146 AVIOInterruptCB *cb)
147{
148 int runs = timeout / POLLING_TIME;
149 int ret = 0;
150
151 do {
152 if (ff_check_interrupt(cb))
153 return AVERROR_EXIT;
154 ret = poll(p, nfds, POLLING_TIME);
155 if (ret != 0)
156 break;
157 } while (timeout <= 0 || runs-- > 0);
158
159 if (!ret)
160 return AVERROR(ETIMEDOUT);
161 if (ret < 0)
162 return AVERROR(errno);
163 return ret;
164}
165
166int ff_socket(int af, int type, int proto)
167{
168 int fd;
169
170#ifdef SOCK_CLOEXEC
171 fd = socket(af, type | SOCK_CLOEXEC, proto);
172 if (fd == -1 && errno == EINVAL)
173#endif
174 {
175 fd = socket(af, type, proto);
176#if HAVE_FCNTL
177 if (fd != -1) {
178 if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
179 av_log(NULL, AV_LOG_DEBUG, "Failed to set close on exec\n");
180 }
181#endif
182 }
183#ifdef SO_NOSIGPIPE
184 if (fd != -1)
185 setsockopt(fd, SOL_SOCKET, SO_NOSIGPIPE, &(int){1}, sizeof(int));
186#endif
187 return fd;
188}
189
190int ff_listen(int fd, const struct sockaddr *addr,
191 socklen_t addrlen)
192{
193 int ret;
194 int reuse = 1;
195 if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse))) {
196 av_log(NULL, AV_LOG_WARNING, "setsockopt(SO_REUSEADDR) failed\n");
197 }
198 ret = bind(fd, addr, addrlen);
199 if (ret)
200 return ff_neterrno();
201
202 ret = listen(fd, 1);
203 if (ret)
204 return ff_neterrno();
205 return ret;
206}
207
208int ff_accept(int fd, int timeout, URLContext *h)
209{
210 int ret;
211 struct pollfd lp = { fd, POLLIN, 0 };
212
213 ret = ff_poll_interrupt(&lp, 1, timeout, &h->interrupt_callback);
214 if (ret < 0)
215 return ret;
216
217 ret = accept(fd, NULL, NULL);
218 if (ret < 0)
219 return ff_neterrno();
220 if (ff_socket_nonblock(ret, 1) < 0)
221 av_log(NULL, AV_LOG_DEBUG, "ff_socket_nonblock failed\n");
222
223 return ret;
224}
225
226int ff_listen_bind(int fd, const struct sockaddr *addr,
227 socklen_t addrlen, int timeout, URLContext *h)
228{
229 int ret;
230 if ((ret = ff_listen(fd, addr, addrlen)) < 0)
231 return ret;
232 if ((ret = ff_accept(fd, timeout, h)) < 0)
233 return ret;
234 closesocket(fd);
235 return ret;
236}
237
238int ff_listen_connect(int fd, const struct sockaddr *addr,
239 socklen_t addrlen, int timeout, URLContext *h,
240 int will_try_next)
241{
242 struct pollfd p = {fd, POLLOUT, 0};
243 int ret;
244 socklen_t optlen;
245
246 if (ff_socket_nonblock(fd, 1) < 0)
247 av_log(NULL, AV_LOG_DEBUG, "ff_socket_nonblock failed\n");
248
249 while ((ret = connect(fd, addr, addrlen))) {
250 ret = ff_neterrno();
251 switch (ret) {
252 case AVERROR(EINTR):
253 if (ff_check_interrupt(&h->interrupt_callback))
254 return AVERROR_EXIT;
255 continue;
256 case AVERROR(EINPROGRESS):
257 case AVERROR(EAGAIN):
258 ret = ff_poll_interrupt(&p, 1, timeout, &h->interrupt_callback);
259 if (ret < 0)
260 return ret;
261 optlen = sizeof(ret);
262 if (getsockopt (fd, SOL_SOCKET, SO_ERROR, &ret, &optlen))
263 ret = AVUNERROR(ff_neterrno());
264 if (ret != 0) {
265 char errbuf[100];
266 ret = AVERROR(ret);
267 av_strerror(ret, errbuf, sizeof(errbuf));
268 if (will_try_next)
269 av_log(h, AV_LOG_WARNING,
270 "Connection to %s failed (%s), trying next address\n",
271 h->filename, errbuf);
272 else
273 av_log(h, AV_LOG_ERROR, "Connection to %s failed: %s\n",
274 h->filename, errbuf);
275 }
276 default:
277 return ret;
278 }
279 }
280 return ret;
281}
282
283static int match_host_pattern(const char *pattern, const char *hostname)
284{
285 int len_p, len_h;
286 if (!strcmp(pattern, "*"))
287 return 1;
288 // Skip a possible *. at the start of the pattern
289 if (pattern[0] == '*')
290 pattern++;
291 if (pattern[0] == '.')
292 pattern++;
293 len_p = strlen(pattern);
294 len_h = strlen(hostname);
295 if (len_p > len_h)
296 return 0;
297 // Simply check if the end of hostname is equal to 'pattern'
298 if (!strcmp(pattern, &hostname[len_h - len_p])) {
299 if (len_h == len_p)
300 return 1; // Exact match
301 if (hostname[len_h - len_p - 1] == '.')
302 return 1; // The matched substring is a domain and not just a substring of a domain
303 }
304 return 0;
305}
306
307int ff_http_match_no_proxy(const char *no_proxy, const char *hostname)
308{
309 char *buf, *start;
310 int ret = 0;
311 if (!no_proxy)
312 return 0;
313 if (!hostname)
314 return 0;
315 buf = av_strdup(no_proxy);
316 if (!buf)
317 return 0;
318 start = buf;
319 while (start) {
320 char *sep, *next = NULL;
321 start += strspn(start, " ,");
322 sep = start + strcspn(start, " ,");
323 if (*sep) {
324 next = sep + 1;
325 *sep = '\0';
326 }
327 if (match_host_pattern(start, hostname)) {
328 ret = 1;
329 break;
330 }
331 start = next;
332 }
333 av_free(buf);
334 return ret;
335}
336
generated by cgit at 2024-05-17 05:46:57 (GMT)