FFmpeg: libavformat/network.c Source File

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libavformat

network.c

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1 /*

3 *

4 * This file is part of Libav.

5 *

6 * Libav 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 * Libav 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 Libav; if not, write to the Free Software

18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

19 */

21 #include "libavutil/avutil.h"

22 #include "network.h"

23 #include "url.h"

24 #include "libavcodec/internal.h"

25 #include "libavutil/mem.h"

26 #include "url.h"

27 #include "libavutil/time.h"

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

39 #if CONFIG_OPENSSL

40 #include <openssl/ssl.h>

41 static int openssl_init;

42 #if HAVE_THREADS

43 #include <openssl/crypto.h>

44 #include "libavutil/avutil.h"

45 pthread_mutex_t *openssl_mutexes;

46 static void openssl_lock(int mode, int type, const char *file, int line)

47 {

48 if (mode & CRYPTO_LOCK)

49 pthread_mutex_lock(&openssl_mutexes[type]);

50 else

51 pthread_mutex_unlock(&openssl_mutexes[type]);

52 }

53 #if !defined(WIN32) && OPENSSL_VERSION_NUMBER < 0x10000000

54 static unsigned long openssl_thread_id(void)

55 {

56 return (intptr_t) pthread_self();

57 }

58 #endif

59 #endif

60 #endif

61 #if CONFIG_GNUTLS

62 #include <gnutls/gnutls.h>

63 #if HAVE_THREADS && GNUTLS_VERSION_NUMBER <= 0x020b00

64 #include <gcrypt.h>

65 #include <errno.h>

66 GCRY_THREAD_OPTION_PTHREAD_IMPL;

67 #endif

68 #endif

70 void ff_tls_init(void)

71 {

72 avpriv_lock_avformat();

73 #if CONFIG_OPENSSL

74 if (!openssl_init) {

75 SSL_library_init();

76 SSL_load_error_strings();

77 #if HAVE_THREADS

78 if (!CRYPTO_get_locking_callback()) {

79 int i;

80 openssl_mutexes = av_malloc(sizeof(pthread_mutex_t) * CRYPTO_num_locks());

81 for (i = 0; i < CRYPTO_num_locks(); i++)

82 pthread_mutex_init(&openssl_mutexes[i], NULL);

83 CRYPTO_set_locking_callback(openssl_lock);

84 #if !defined(WIN32) && OPENSSL_VERSION_NUMBER < 0x10000000

85 CRYPTO_set_id_callback(openssl_thread_id);

86 #endif

87 }

88 #endif

89 }

90 openssl_init++;

91 #endif

92 #if CONFIG_GNUTLS

93 #if HAVE_THREADS && GNUTLS_VERSION_NUMBER < 0x020b00

94 if (gcry_control(GCRYCTL_ANY_INITIALIZATION_P) == 0)

95 gcry_control(GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);

96 #endif

97 gnutls_global_init();

98 #endif

99 avpriv_unlock_avformat();

100 }

101

102 void ff_tls_deinit(void)

103 {

104 avpriv_lock_avformat();

105 #if CONFIG_OPENSSL

106 openssl_init--;

107 if (!openssl_init) {

108 #if HAVE_THREADS

109 if (CRYPTO_get_locking_callback() == openssl_lock) {

110 int i;

111 CRYPTO_set_locking_callback(NULL);

112 for (i = 0; i < CRYPTO_num_locks(); i++)

113 pthread_mutex_destroy(&openssl_mutexes[i]);

114 av_free(openssl_mutexes);

115 }

116 #endif

117 }

118 #endif

119 #if CONFIG_GNUTLS

120 gnutls_global_deinit();

121 #endif

122 avpriv_unlock_avformat();

123 }

124

125 int ff_network_inited_globally;

126

127 int ff_network_init(void)

128 {

129 #if HAVE_WINSOCK2_H

130 WSADATA wsaData;

131 #endif

132

133 if (!ff_network_inited_globally)

134 av_log(NULL, AV_LOG_WARNING, "Using network protocols without global "

135 "network initialization. Please use "

136 "avformat_network_init(), this will "

137 "become mandatory later.\n");

138 #if HAVE_WINSOCK2_H

139 if (WSAStartup(MAKEWORD(1,1), &wsaData))

140 return 0;

141 #endif

142 return 1;

143 }

144

145 int ff_network_wait_fd(int fd, int write)

146 {

147 int ev = write ? POLLOUT : POLLIN;

148 struct pollfd p = { .fd = fd, .events = ev, .revents = 0 };

149 int ret;

150 ret = poll(&p, 1, 100);

151 return ret < 0 ? ff_neterrno() : p.revents & (ev | POLLERR | POLLHUP) ? 0 : AVERROR(EAGAIN);

152 }

153

154 int ff_network_wait_fd_timeout(int fd, int write, int64_t timeout, AVIOInterruptCB *int_cb)

155 {

156 int ret;

157 int64_t wait_start = 0;

158

159 while (1) {

160 ret = ff_network_wait_fd(fd, write);

161 if (ret != AVERROR(EAGAIN))

162 return ret;

163 if (ff_check_interrupt(int_cb))

164 return AVERROR_EXIT;

165 if (timeout > 0) {

166 if (!wait_start)

167 wait_start = av_gettime();

168 else if (av_gettime() - wait_start > timeout)

169 return AVERROR(ETIMEDOUT);

170 }

171 }

172 }

173

174 void ff_network_close(void)

175 {

176 #if HAVE_WINSOCK2_H

177 WSACleanup();

178 #endif

179 }

180

181 #if HAVE_WINSOCK2_H

182 int ff_neterrno(void)

183 {

184 int err = WSAGetLastError();

185 switch (err) {

186 case WSAEWOULDBLOCK:

187 return AVERROR(EAGAIN);

188 case WSAEINTR:

189 return AVERROR(EINTR);

190 case WSAEPROTONOSUPPORT:

191 return AVERROR(EPROTONOSUPPORT);

192 case WSAETIMEDOUT:

193 return AVERROR(ETIMEDOUT);

194 case WSAECONNREFUSED:

195 return AVERROR(ECONNREFUSED);

196 case WSAEINPROGRESS:

197 return AVERROR(EINPROGRESS);

198 }

199 return -err;

200 }

201 #endif

202

203 int ff_is_multicast_address(struct sockaddr *addr)

204 {

205 if (addr->sa_family == AF_INET) {

206 return IN_MULTICAST(ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr));

207 }

208 #if HAVE_STRUCT_SOCKADDR_IN6

209 if (addr->sa_family == AF_INET6) {

210 return IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *)addr)->sin6_addr);

211 }

212 #endif

213

214 return 0;

215 }

216

217 static int ff_poll_interrupt(struct pollfd *p, nfds_t nfds, int timeout,

218 AVIOInterruptCB *cb)

219 {

220 int runs = timeout / POLLING_TIME;

221 int ret = 0;

222

223 do {

224 if (ff_check_interrupt(cb))

225 return AVERROR_EXIT;

226 ret = poll(p, nfds, POLLING_TIME);

227 if (ret != 0)

228 break;

229 } while (timeout <= 0 || runs-- > 0);

230

231 if (!ret)

232 return AVERROR(ETIMEDOUT);

233 if (ret < 0)

234 return AVERROR(errno);

235 return ret;

236 }

237

238 int ff_listen_bind(int fd, const struct sockaddr *addr,

239 socklen_t addrlen, int timeout, URLContext *h)

240 {

241 int ret;

242 int reuse = 1;

243 struct pollfd lp = { fd, POLLIN, 0 };

244 if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse))) {

245 av_log(NULL, AV_LOG_WARNING, "setsockopt(SO_REUSEADDR) failed\n");

246 }

247 ret = bind(fd, addr, addrlen);

248 if (ret)

249 return ff_neterrno();

250

251 ret = listen(fd, 1);

252 if (ret)

253 return ff_neterrno();

254

255 ret = ff_poll_interrupt(&lp, 1, timeout, &h->interrupt_callback);

256 if (ret < 0)

257 return ret;

258

259 ret = accept(fd, NULL, NULL);

260 if (ret < 0)

261 return ff_neterrno();

262

263 closesocket(fd);

264

265 ff_socket_nonblock(ret, 1);

266 return ret;

267 }

268

269 int ff_listen_connect(int fd, const struct sockaddr *addr,

270 socklen_t addrlen, int timeout, URLContext *h)

271 {

272 struct pollfd p = {fd, POLLOUT, 0};

273 int ret;

274 socklen_t optlen;

275

276 ff_socket_nonblock(fd, 1);

277

278 while ((ret = connect(fd, addr, addrlen))) {

279 ret = ff_neterrno();

280 switch (ret) {

281 case AVERROR(EINTR):

282 if (ff_check_interrupt(&h->interrupt_callback))

283 return AVERROR_EXIT;

284 continue;

285 case AVERROR(EINPROGRESS):

286 case AVERROR(EAGAIN):

287 ret = ff_poll_interrupt(&p, 1, timeout, &h->interrupt_callback);

288 if (ret < 0)

289 return ret;

290 optlen = sizeof(ret);

291 if (getsockopt (fd, SOL_SOCKET, SO_ERROR, &ret, &optlen))

292 ret = AVUNERROR(ff_neterrno());

293 if (ret != 0) {

294 char errbuf[100];

295 ret = AVERROR(ret);

296 av_strerror(ret, errbuf, sizeof(errbuf));

297 av_log(h, AV_LOG_ERROR,

298 "Connection to %s failed: %s\n",

299 h->filename, errbuf);

300 }

301 default:

302 return ret;

303 }

304 }

305 return ret;

306 }

307

308 static int match_host_pattern(const char *pattern, const char *hostname)

309 {

310 int len_p, len_h;

311 if (!strcmp(pattern, "*"))

312 return 1;

313 // Skip a possible *. at the start of the pattern

314 if (pattern[0] == '*')

315 pattern++;

316 if (pattern[0] == '.')

317 pattern++;

318 len_p = strlen(pattern);

319 len_h = strlen(hostname);

320 if (len_p > len_h)

321 return 0;

322 // Simply check if the end of hostname is equal to 'pattern'

323 if (!strcmp(pattern, &hostname[len_h - len_p])) {

324 if (len_h == len_p)

325 return 1; // Exact match

326 if (hostname[len_h - len_p - 1] == '.')

327 return 1; // The matched substring is a domain and not just a substring of a domain

328 }

329 return 0;

330 }

331

332 int ff_http_match_no_proxy(const char *no_proxy, const char *hostname)

333 {

334 char *buf, *start;

335 int ret = 0;

336 if (!no_proxy)

337 return 0;

338 if (!hostname)

339 return 0;

340 buf = av_strdup(no_proxy);

341 if (!buf)

342 return 0;

343 start = buf;

344 while (start) {

345 char *sep, *next = NULL;

346 start += strspn(start, " ,");

347 sep = start + strcspn(start, " ,");

348 if (*sep) {

349 next = sep + 1;

350 *sep = '0円';

351 }

352 if (match_host_pattern(start, hostname)) {

353 ret = 1;

354 break;

355 }

356 start = next;

357 }

358 av_free(buf);

359 return ret;

360 }

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