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2ba45a60 DM |
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 "url.h" | |
24 | #include "libavcodec/internal.h" | |
25 | #include "libavutil/avutil.h" | |
26 | #include "libavutil/mem.h" | |
27 | #include "libavutil/time.h" | |
28 | ||
29 | #if HAVE_THREADS | |
30 | #if HAVE_PTHREADS | |
31 | #include <pthread.h> | |
32 | #elif HAVE_OS2THREADS | |
33 | #include "compat/os2threads.h" | |
34 | #else | |
35 | #include "compat/w32pthreads.h" | |
36 | #endif | |
37 | #endif | |
38 | ||
39 | #if CONFIG_OPENSSL | |
40 | #include <openssl/ssl.h> | |
41 | static int openssl_init; | |
42 | #if HAVE_THREADS | |
43 | #include <openssl/crypto.h> | |
44 | pthread_mutex_t *openssl_mutexes; | |
45 | static void openssl_lock(int mode, int type, const char *file, int line) | |
46 | { | |
47 | if (mode & CRYPTO_LOCK) | |
48 | pthread_mutex_lock(&openssl_mutexes[type]); | |
49 | else | |
50 | pthread_mutex_unlock(&openssl_mutexes[type]); | |
51 | } | |
52 | #if !defined(WIN32) && OPENSSL_VERSION_NUMBER < 0x10000000 | |
53 | static unsigned long openssl_thread_id(void) | |
54 | { | |
55 | return (intptr_t) pthread_self(); | |
56 | } | |
57 | #endif | |
58 | #endif | |
59 | #endif | |
60 | #if CONFIG_GNUTLS | |
61 | #include <gnutls/gnutls.h> | |
62 | #if HAVE_THREADS && GNUTLS_VERSION_NUMBER <= 0x020b00 | |
63 | #include <gcrypt.h> | |
64 | #include <errno.h> | |
65 | GCRY_THREAD_OPTION_PTHREAD_IMPL; | |
66 | #endif | |
67 | #endif | |
68 | ||
69 | void ff_tls_init(void) | |
70 | { | |
71 | avpriv_lock_avformat(); | |
72 | #if CONFIG_OPENSSL | |
73 | if (!openssl_init) { | |
74 | SSL_library_init(); | |
75 | SSL_load_error_strings(); | |
76 | #if HAVE_THREADS | |
77 | if (!CRYPTO_get_locking_callback()) { | |
78 | int i; | |
79 | openssl_mutexes = av_malloc_array(sizeof(pthread_mutex_t), CRYPTO_num_locks()); | |
80 | for (i = 0; i < CRYPTO_num_locks(); i++) | |
81 | pthread_mutex_init(&openssl_mutexes[i], NULL); | |
82 | CRYPTO_set_locking_callback(openssl_lock); | |
83 | #if !defined(WIN32) && OPENSSL_VERSION_NUMBER < 0x10000000 | |
84 | CRYPTO_set_id_callback(openssl_thread_id); | |
85 | #endif | |
86 | } | |
87 | #endif | |
88 | } | |
89 | openssl_init++; | |
90 | #endif | |
91 | #if CONFIG_GNUTLS | |
92 | #if HAVE_THREADS && GNUTLS_VERSION_NUMBER < 0x020b00 | |
93 | if (gcry_control(GCRYCTL_ANY_INITIALIZATION_P) == 0) | |
94 | gcry_control(GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread); | |
95 | #endif | |
96 | gnutls_global_init(); | |
97 | #endif | |
98 | avpriv_unlock_avformat(); | |
99 | } | |
100 | ||
101 | void ff_tls_deinit(void) | |
102 | { | |
103 | avpriv_lock_avformat(); | |
104 | #if CONFIG_OPENSSL | |
105 | openssl_init--; | |
106 | if (!openssl_init) { | |
107 | #if HAVE_THREADS | |
108 | if (CRYPTO_get_locking_callback() == openssl_lock) { | |
109 | int i; | |
110 | CRYPTO_set_locking_callback(NULL); | |
111 | for (i = 0; i < CRYPTO_num_locks(); i++) | |
112 | pthread_mutex_destroy(&openssl_mutexes[i]); | |
113 | av_free(openssl_mutexes); | |
114 | } | |
115 | #endif | |
116 | } | |
117 | #endif | |
118 | #if CONFIG_GNUTLS | |
119 | gnutls_global_deinit(); | |
120 | #endif | |
121 | avpriv_unlock_avformat(); | |
122 | } | |
123 | ||
124 | int ff_network_inited_globally; | |
125 | ||
126 | int ff_network_init(void) | |
127 | { | |
128 | #if HAVE_WINSOCK2_H | |
129 | WSADATA wsaData; | |
130 | #endif | |
131 | ||
132 | if (!ff_network_inited_globally) | |
133 | av_log(NULL, AV_LOG_WARNING, "Using network protocols without global " | |
134 | "network initialization. Please use " | |
135 | "avformat_network_init(), this will " | |
136 | "become mandatory later.\n"); | |
137 | #if HAVE_WINSOCK2_H | |
138 | if (WSAStartup(MAKEWORD(1,1), &wsaData)) | |
139 | return 0; | |
140 | #endif | |
141 | return 1; | |
142 | } | |
143 | ||
144 | int ff_network_wait_fd(int fd, int write) | |
145 | { | |
146 | int ev = write ? POLLOUT : POLLIN; | |
147 | struct pollfd p = { .fd = fd, .events = ev, .revents = 0 }; | |
148 | int ret; | |
149 | ret = poll(&p, 1, 100); | |
150 | return ret < 0 ? ff_neterrno() : p.revents & (ev | POLLERR | POLLHUP) ? 0 : AVERROR(EAGAIN); | |
151 | } | |
152 | ||
153 | int ff_network_wait_fd_timeout(int fd, int write, int64_t timeout, AVIOInterruptCB *int_cb) | |
154 | { | |
155 | int ret; | |
156 | int64_t wait_start = 0; | |
157 | ||
158 | while (1) { | |
159 | if (ff_check_interrupt(int_cb)) | |
160 | return AVERROR_EXIT; | |
161 | ret = ff_network_wait_fd(fd, write); | |
162 | if (ret != AVERROR(EAGAIN)) | |
163 | return ret; | |
164 | if (timeout > 0) { | |
165 | if (!wait_start) | |
166 | wait_start = av_gettime_relative(); | |
167 | else if (av_gettime_relative() - wait_start > timeout) | |
168 | return AVERROR(ETIMEDOUT); | |
169 | } | |
170 | } | |
171 | } | |
172 | ||
173 | void ff_network_close(void) | |
174 | { | |
175 | #if HAVE_WINSOCK2_H | |
176 | WSACleanup(); | |
177 | #endif | |
178 | } | |
179 | ||
180 | #if HAVE_WINSOCK2_H | |
181 | int ff_neterrno(void) | |
182 | { | |
183 | int err = WSAGetLastError(); | |
184 | switch (err) { | |
185 | case WSAEWOULDBLOCK: | |
186 | return AVERROR(EAGAIN); | |
187 | case WSAEINTR: | |
188 | return AVERROR(EINTR); | |
189 | case WSAEPROTONOSUPPORT: | |
190 | return AVERROR(EPROTONOSUPPORT); | |
191 | case WSAETIMEDOUT: | |
192 | return AVERROR(ETIMEDOUT); | |
193 | case WSAECONNREFUSED: | |
194 | return AVERROR(ECONNREFUSED); | |
195 | case WSAEINPROGRESS: | |
196 | return AVERROR(EINPROGRESS); | |
197 | } | |
198 | return -err; | |
199 | } | |
200 | #endif | |
201 | ||
202 | int ff_is_multicast_address(struct sockaddr *addr) | |
203 | { | |
204 | if (addr->sa_family == AF_INET) { | |
205 | return IN_MULTICAST(ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr)); | |
206 | } | |
207 | #if HAVE_STRUCT_SOCKADDR_IN6 | |
208 | if (addr->sa_family == AF_INET6) { | |
209 | return IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *)addr)->sin6_addr); | |
210 | } | |
211 | #endif | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
216 | static int ff_poll_interrupt(struct pollfd *p, nfds_t nfds, int timeout, | |
217 | AVIOInterruptCB *cb) | |
218 | { | |
219 | int runs = timeout / POLLING_TIME; | |
220 | int ret = 0; | |
221 | ||
222 | do { | |
223 | if (ff_check_interrupt(cb)) | |
224 | return AVERROR_EXIT; | |
225 | ret = poll(p, nfds, POLLING_TIME); | |
226 | if (ret != 0) | |
227 | break; | |
228 | } while (timeout <= 0 || runs-- > 0); | |
229 | ||
230 | if (!ret) | |
231 | return AVERROR(ETIMEDOUT); | |
232 | if (ret < 0) | |
233 | return AVERROR(errno); | |
234 | return ret; | |
235 | } | |
236 | ||
237 | int ff_socket(int af, int type, int proto) | |
238 | { | |
239 | int fd; | |
240 | ||
241 | #ifdef SOCK_CLOEXEC | |
242 | fd = socket(af, type | SOCK_CLOEXEC, proto); | |
243 | if (fd == -1 && errno == EINVAL) | |
244 | #endif | |
245 | { | |
246 | fd = socket(af, type, proto); | |
247 | #if HAVE_FCNTL | |
248 | if (fd != -1) { | |
249 | if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1) | |
250 | av_log(NULL, AV_LOG_DEBUG, "Failed to set close on exec\n"); | |
251 | } | |
252 | #endif | |
253 | } | |
254 | return fd; | |
255 | } | |
256 | ||
257 | int ff_listen_bind(int fd, const struct sockaddr *addr, | |
258 | socklen_t addrlen, int timeout, URLContext *h) | |
259 | { | |
260 | int ret; | |
261 | int reuse = 1; | |
262 | struct pollfd lp = { fd, POLLIN, 0 }; | |
263 | if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse))) { | |
264 | av_log(NULL, AV_LOG_WARNING, "setsockopt(SO_REUSEADDR) failed\n"); | |
265 | } | |
266 | ret = bind(fd, addr, addrlen); | |
267 | if (ret) | |
268 | return ff_neterrno(); | |
269 | ||
270 | ret = listen(fd, 1); | |
271 | if (ret) | |
272 | return ff_neterrno(); | |
273 | ||
274 | ret = ff_poll_interrupt(&lp, 1, timeout, &h->interrupt_callback); | |
275 | if (ret < 0) | |
276 | return ret; | |
277 | ||
278 | ret = accept(fd, NULL, NULL); | |
279 | if (ret < 0) | |
280 | return ff_neterrno(); | |
281 | ||
282 | closesocket(fd); | |
283 | ||
284 | if (ff_socket_nonblock(ret, 1) < 0) | |
285 | av_log(NULL, AV_LOG_DEBUG, "ff_socket_nonblock failed\n"); | |
286 | ||
287 | return ret; | |
288 | } | |
289 | ||
290 | int ff_listen_connect(int fd, const struct sockaddr *addr, | |
291 | socklen_t addrlen, int timeout, URLContext *h, | |
292 | int will_try_next) | |
293 | { | |
294 | struct pollfd p = {fd, POLLOUT, 0}; | |
295 | int ret; | |
296 | socklen_t optlen; | |
297 | ||
298 | if (ff_socket_nonblock(fd, 1) < 0) | |
299 | av_log(NULL, AV_LOG_DEBUG, "ff_socket_nonblock failed\n"); | |
300 | ||
301 | while ((ret = connect(fd, addr, addrlen))) { | |
302 | ret = ff_neterrno(); | |
303 | switch (ret) { | |
304 | case AVERROR(EINTR): | |
305 | if (ff_check_interrupt(&h->interrupt_callback)) | |
306 | return AVERROR_EXIT; | |
307 | continue; | |
308 | case AVERROR(EINPROGRESS): | |
309 | case AVERROR(EAGAIN): | |
310 | ret = ff_poll_interrupt(&p, 1, timeout, &h->interrupt_callback); | |
311 | if (ret < 0) | |
312 | return ret; | |
313 | optlen = sizeof(ret); | |
314 | if (getsockopt (fd, SOL_SOCKET, SO_ERROR, &ret, &optlen)) | |
315 | ret = AVUNERROR(ff_neterrno()); | |
316 | if (ret != 0) { | |
317 | char errbuf[100]; | |
318 | ret = AVERROR(ret); | |
319 | av_strerror(ret, errbuf, sizeof(errbuf)); | |
320 | if (will_try_next) | |
321 | av_log(h, AV_LOG_WARNING, | |
322 | "Connection to %s failed (%s), trying next address\n", | |
323 | h->filename, errbuf); | |
324 | else | |
325 | av_log(h, AV_LOG_ERROR, "Connection to %s failed: %s\n", | |
326 | h->filename, errbuf); | |
327 | } | |
328 | default: | |
329 | return ret; | |
330 | } | |
331 | } | |
332 | return ret; | |
333 | } | |
334 | ||
335 | static int match_host_pattern(const char *pattern, const char *hostname) | |
336 | { | |
337 | int len_p, len_h; | |
338 | if (!strcmp(pattern, "*")) | |
339 | return 1; | |
340 | // Skip a possible *. at the start of the pattern | |
341 | if (pattern[0] == '*') | |
342 | pattern++; | |
343 | if (pattern[0] == '.') | |
344 | pattern++; | |
345 | len_p = strlen(pattern); | |
346 | len_h = strlen(hostname); | |
347 | if (len_p > len_h) | |
348 | return 0; | |
349 | // Simply check if the end of hostname is equal to 'pattern' | |
350 | if (!strcmp(pattern, &hostname[len_h - len_p])) { | |
351 | if (len_h == len_p) | |
352 | return 1; // Exact match | |
353 | if (hostname[len_h - len_p - 1] == '.') | |
354 | return 1; // The matched substring is a domain and not just a substring of a domain | |
355 | } | |
356 | return 0; | |
357 | } | |
358 | ||
359 | int ff_http_match_no_proxy(const char *no_proxy, const char *hostname) | |
360 | { | |
361 | char *buf, *start; | |
362 | int ret = 0; | |
363 | if (!no_proxy) | |
364 | return 0; | |
365 | if (!hostname) | |
366 | return 0; | |
367 | buf = av_strdup(no_proxy); | |
368 | if (!buf) | |
369 | return 0; | |
370 | start = buf; | |
371 | while (start) { | |
372 | char *sep, *next = NULL; | |
373 | start += strspn(start, " ,"); | |
374 | sep = start + strcspn(start, " ,"); | |
375 | if (*sep) { | |
376 | next = sep + 1; | |
377 | *sep = '\0'; | |
378 | } | |
379 | if (match_host_pattern(start, hostname)) { | |
380 | ret = 1; | |
381 | break; | |
382 | } | |
383 | start = next; | |
384 | } | |
385 | av_free(buf); | |
386 | return ret; | |
387 | } |