1 /*
2 * UDP prototype streaming system
3 * Copyright (c) 2000, 2001, 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
22 /**
23 * @file
24 * UDP protocol
25 */
26
27 #define _DEFAULT_SOURCE
28 #define _BSD_SOURCE /* Needed for using struct ip_mreq with recent glibc */
29
30 #include "avformat.h"
31 #include "avio_internal.h"
32 #include "libavutil/avassert.h"
33 #include "libavutil/parseutils.h"
34 #include "libavutil/fifo.h"
35 #include "libavutil/intreadwrite.h"
36 #include "libavutil/avstring.h"
37 #include "libavutil/opt.h"
38 #include "libavutil/log.h"
39 #include "libavutil/time.h"
40 #include "internal.h"
41 #include "network.h"
42 #include "os_support.h"
43 #include "url.h"
44 #include "ip.h"
45
46 #ifdef __APPLE__
47 #include "TargetConditionals.h"
48 #endif
49
50 #if HAVE_UDPLITE_H
51 #include "udplite.h"
52 #else
53 /* On many Linux systems, udplite.h is missing but the kernel supports UDP-Lite.
54 * So, we provide a fallback here.
55 */
56 #define UDPLITE_SEND_CSCOV 10
57 #define UDPLITE_RECV_CSCOV 11
58 #endif
59
60 #ifndef IPPROTO_UDPLITE
61 #define IPPROTO_UDPLITE 136
62 #endif
63
64 #if HAVE_W32THREADS
65 #undef HAVE_PTHREAD_CANCEL
66 #define HAVE_PTHREAD_CANCEL 1
67 #endif
68
69 #if HAVE_PTHREAD_CANCEL
70 #include "libavutil/thread.h"
71 #endif
72
73 #ifndef IPV6_ADD_MEMBERSHIP
74 #define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
75 #define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
76 #endif
77
78 #define UDP_TX_BUF_SIZE 32768
79 #define UDP_RX_BUF_SIZE 393216
80 #define UDP_MAX_PKT_SIZE 65536
81 #define UDP_HEADER_SIZE 8
82
83 typedef struct UDPContext {
84 const AVClass *class;
85 int udp_fd;
86 int ttl;
87 int udplite_coverage;
88 int buffer_size;
89 int pkt_size;
90 int is_multicast;
91 int is_broadcast;
92 int local_port;
93 int reuse_socket;
94 int overrun_nonfatal;
95 struct sockaddr_storage dest_addr;
96 int dest_addr_len;
97 int is_connected;
98
99 /* Circular Buffer variables for use in UDP receive code */
100 int circular_buffer_size;
101 AVFifo *fifo;
102 int circular_buffer_error;
103 int64_t bitrate; /* number of bits to send per second */
104 int64_t burst_bits;
105 int close_req;
106 #if HAVE_PTHREAD_CANCEL
107 pthread_t circular_buffer_thread;
108 pthread_mutex_t mutex;
109 pthread_cond_t cond;
110 int thread_started;
111 #endif
112 uint8_t tmp[UDP_MAX_PKT_SIZE+4];
113 int remaining_in_dg;
114 char *localaddr;
115 int timeout;
116 struct sockaddr_storage local_addr_storage;
117 char *sources;
118 char *block;
119 IPSourceFilters filters;
120 } UDPContext;
121
122 #define OFFSET(x) offsetof(UDPContext, x)
123 #define D AV_OPT_FLAG_DECODING_PARAM
124 #define E AV_OPT_FLAG_ENCODING_PARAM
125 static const AVOption options[] = {
126 { "buffer_size", "System data size (in bytes)", OFFSET(buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
127 { "bitrate", "Bits to send per second", OFFSET(bitrate), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, .flags = E },
128 { "burst_bits", "Max length of bursts in bits (when using bitrate)", OFFSET(burst_bits), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, .flags = E },
129 { "localport", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, D|E },
130 { "local_port", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
131 { "localaddr", "Local address", OFFSET(localaddr), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
132 { "udplite_coverage", "choose UDPLite head size which should be validated by checksum", OFFSET(udplite_coverage), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D|E },
133 { "pkt_size", "Maximum UDP packet size", OFFSET(pkt_size), AV_OPT_TYPE_INT, { .i64 = 1472 }, -1, INT_MAX, .flags = D|E },
134 { "reuse", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, D|E },
135 { "reuse_socket", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, .flags = D|E },
136 { "broadcast", "explicitly allow or disallow broadcast destination", OFFSET(is_broadcast), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
137 { "ttl", "Time to live (multicast only)", OFFSET(ttl), AV_OPT_TYPE_INT, { .i64 = 16 }, 0, 255, E },
138 { "connect", "set if connect() should be called on socket", OFFSET(is_connected), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, .flags = D|E },
139 { "fifo_size", "set the UDP receiving circular buffer size, expressed as a number of packets with size of 188 bytes", OFFSET(circular_buffer_size), AV_OPT_TYPE_INT, {.i64 = 7*4096}, 0, INT_MAX, D },
140 { "overrun_nonfatal", "survive in case of UDP receiving circular buffer overrun", OFFSET(overrun_nonfatal), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, D },
141 { "timeout", "set raise error timeout, in microseconds (only in read mode)",OFFSET(timeout), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D },
142 { "sources", "Source list", OFFSET(sources), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
143 { "block", "Block list", OFFSET(block), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
144 { NULL }
145 };
146
147 static const AVClass udp_class = {
148 .class_name = "udp",
149 .item_name = av_default_item_name,
150 .option = options,
151 .version = LIBAVUTIL_VERSION_INT,
152 };
153
154 static const AVClass udplite_context_class = {
155 .class_name = "udplite",
156 .item_name = av_default_item_name,
157 .option = options,
158 .version = LIBAVUTIL_VERSION_INT,
159 };
160
udp_set_multicast_ttl(int sockfd,int mcastTTL,struct sockaddr * addr,void * logctx)161 static int udp_set_multicast_ttl(int sockfd, int mcastTTL,
162 struct sockaddr *addr,
163 void *logctx)
164 {
165 int protocol, cmd;
166
167 /* There is some confusion in the world whether IP_MULTICAST_TTL
168 * takes a byte or an int as an argument.
169 * BSD seems to indicate byte so we are going with that and use
170 * int and fall back to byte to be safe */
171 switch (addr->sa_family) {
172 #ifdef IP_MULTICAST_TTL
173 case AF_INET:
174 protocol = IPPROTO_IP;
175 cmd = IP_MULTICAST_TTL;
176 break;
177 #endif
178 #ifdef IPV6_MULTICAST_HOPS
179 case AF_INET6:
180 protocol = IPPROTO_IPV6;
181 cmd = IPV6_MULTICAST_HOPS;
182 break;
183 #endif
184 default:
185 return 0;
186 }
187
188 if (setsockopt(sockfd, protocol, cmd, &mcastTTL, sizeof(mcastTTL)) < 0) {
189 /* BSD compatibility */
190 unsigned char ttl = (unsigned char) mcastTTL;
191
192 ff_log_net_error(logctx, AV_LOG_DEBUG, "setsockopt(IPV4/IPV6 MULTICAST TTL)");
193 if (setsockopt(sockfd, protocol, cmd, &ttl, sizeof(ttl)) < 0) {
194 ff_log_net_error(logctx, AV_LOG_ERROR, "setsockopt(IPV4/IPV6 MULTICAST TTL)");
195 return ff_neterrno();
196 }
197 }
198
199 return 0;
200 }
201
udp_join_multicast_group(int sockfd,struct sockaddr * addr,struct sockaddr * local_addr,void * logctx)202 static int udp_join_multicast_group(int sockfd, struct sockaddr *addr,
203 struct sockaddr *local_addr, void *logctx)
204 {
205 #ifdef IP_ADD_MEMBERSHIP
206 if (addr->sa_family == AF_INET) {
207 struct ip_mreq mreq;
208
209 mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
210 if (local_addr)
211 mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
212 else
213 mreq.imr_interface.s_addr = INADDR_ANY;
214 if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
215 ff_log_net_error(logctx, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP)");
216 return ff_neterrno();
217 }
218 }
219 #endif
220 #if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
221 if (addr->sa_family == AF_INET6) {
222 struct ipv6_mreq mreq6;
223
224 memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
225 //TODO: Interface index should be looked up from local_addr
226 mreq6.ipv6mr_interface = 0;
227 if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
228 ff_log_net_error(logctx, AV_LOG_ERROR, "setsockopt(IPV6_ADD_MEMBERSHIP)");
229 return ff_neterrno();
230 }
231 }
232 #endif
233 return 0;
234 }
235
udp_leave_multicast_group(int sockfd,struct sockaddr * addr,struct sockaddr * local_addr,void * logctx)236 static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr,
237 struct sockaddr *local_addr, void *logctx)
238 {
239 #ifdef IP_DROP_MEMBERSHIP
240 if (addr->sa_family == AF_INET) {
241 struct ip_mreq mreq;
242
243 mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
244 if (local_addr)
245 mreq.imr_interface = ((struct sockaddr_in *)local_addr)->sin_addr;
246 else
247 mreq.imr_interface.s_addr = INADDR_ANY;
248 if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
249 ff_log_net_error(logctx, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP)");
250 return -1;
251 }
252 }
253 #endif
254 #if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
255 if (addr->sa_family == AF_INET6) {
256 struct ipv6_mreq mreq6;
257
258 memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
259 //TODO: Interface index should be looked up from local_addr
260 mreq6.ipv6mr_interface = 0;
261 if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
262 ff_log_net_error(logctx, AV_LOG_ERROR, "setsockopt(IPV6_DROP_MEMBERSHIP)");
263 return -1;
264 }
265 }
266 #endif
267 return 0;
268 }
269
udp_set_multicast_sources(URLContext * h,int sockfd,struct sockaddr * addr,int addr_len,struct sockaddr_storage * local_addr,struct sockaddr_storage * sources,int nb_sources,int include)270 static int udp_set_multicast_sources(URLContext *h,
271 int sockfd, struct sockaddr *addr,
272 int addr_len, struct sockaddr_storage *local_addr,
273 struct sockaddr_storage *sources,
274 int nb_sources, int include)
275 {
276 int i;
277 if (addr->sa_family != AF_INET) {
278 #if HAVE_STRUCT_GROUP_SOURCE_REQ && defined(MCAST_BLOCK_SOURCE)
279 /* For IPv4 prefer the old approach, as that alone works reliably on
280 * Windows and it also supports supplying the interface based on its
281 * address. */
282 int i;
283 for (i = 0; i < nb_sources; i++) {
284 struct group_source_req mreqs;
285 int level = addr->sa_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
286
287 //TODO: Interface index should be looked up from local_addr
288 mreqs.gsr_interface = 0;
289 memcpy(&mreqs.gsr_group, addr, addr_len);
290 memcpy(&mreqs.gsr_source, &sources[i], sizeof(*sources));
291
292 if (setsockopt(sockfd, level,
293 include ? MCAST_JOIN_SOURCE_GROUP : MCAST_BLOCK_SOURCE,
294 (const void *)&mreqs, sizeof(mreqs)) < 0) {
295 if (include)
296 ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(MCAST_JOIN_SOURCE_GROUP)");
297 else
298 ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(MCAST_BLOCK_SOURCE)");
299 return ff_neterrno();
300 }
301 }
302 return 0;
303 #else
304 av_log(h, AV_LOG_ERROR,
305 "Setting multicast sources only supported for IPv4\n");
306 return AVERROR(EINVAL);
307 #endif
308 }
309 #if HAVE_STRUCT_IP_MREQ_SOURCE && defined(IP_BLOCK_SOURCE)
310 for (i = 0; i < nb_sources; i++) {
311 struct ip_mreq_source mreqs;
312 if (sources[i].ss_family != AF_INET) {
313 av_log(h, AV_LOG_ERROR, "Source/block address %d is of incorrect protocol family\n", i + 1);
314 return AVERROR(EINVAL);
315 }
316
317 mreqs.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
318 if (local_addr)
319 mreqs.imr_interface = ((struct sockaddr_in *)local_addr)->sin_addr;
320 else
321 mreqs.imr_interface.s_addr = INADDR_ANY;
322 mreqs.imr_sourceaddr.s_addr = ((struct sockaddr_in *)&sources[i])->sin_addr.s_addr;
323
324 if (setsockopt(sockfd, IPPROTO_IP,
325 include ? IP_ADD_SOURCE_MEMBERSHIP : IP_BLOCK_SOURCE,
326 (const void *)&mreqs, sizeof(mreqs)) < 0) {
327 if (include)
328 ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(IP_ADD_SOURCE_MEMBERSHIP)");
329 else
330 ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(IP_BLOCK_SOURCE)");
331 return ff_neterrno();
332 }
333 }
334 #else
335 return AVERROR(ENOSYS);
336 #endif
337 return 0;
338 }
udp_set_url(URLContext * h,struct sockaddr_storage * addr,const char * hostname,int port)339 static int udp_set_url(URLContext *h,
340 struct sockaddr_storage *addr,
341 const char *hostname, int port)
342 {
343 struct addrinfo *res0;
344 int addr_len;
345
346 res0 = ff_ip_resolve_host(h, hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
347 if (!res0) return AVERROR(EIO);
348 memcpy(addr, res0->ai_addr, res0->ai_addrlen);
349 addr_len = res0->ai_addrlen;
350 freeaddrinfo(res0);
351
352 return addr_len;
353 }
354
udp_socket_create(URLContext * h,struct sockaddr_storage * addr,socklen_t * addr_len,const char * localaddr)355 static int udp_socket_create(URLContext *h, struct sockaddr_storage *addr,
356 socklen_t *addr_len, const char *localaddr)
357 {
358 UDPContext *s = h->priv_data;
359 int udp_fd = -1;
360 struct addrinfo *res0, *res;
361 int family = AF_UNSPEC;
362
363 if (((struct sockaddr *) &s->dest_addr)->sa_family)
364 family = ((struct sockaddr *) &s->dest_addr)->sa_family;
365 res0 = ff_ip_resolve_host(h, (localaddr && localaddr[0]) ? localaddr : NULL,
366 s->local_port,
367 SOCK_DGRAM, family, AI_PASSIVE);
368 if (!res0)
369 goto fail;
370 for (res = res0; res; res=res->ai_next) {
371 if (s->udplite_coverage)
372 udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, IPPROTO_UDPLITE, h);
373 else
374 udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, 0, h);
375 if (udp_fd != -1) break;
376 ff_log_net_error(h, AV_LOG_ERROR, "socket");
377 }
378
379 if (udp_fd < 0)
380 goto fail;
381
382 memcpy(addr, res->ai_addr, res->ai_addrlen);
383 *addr_len = res->ai_addrlen;
384
385 freeaddrinfo(res0);
386
387 return udp_fd;
388
389 fail:
390 if (udp_fd >= 0)
391 closesocket(udp_fd);
392 if(res0)
393 freeaddrinfo(res0);
394 return -1;
395 }
396
udp_port(struct sockaddr_storage * addr,int addr_len)397 static int udp_port(struct sockaddr_storage *addr, int addr_len)
398 {
399 char sbuf[sizeof(int)*3+1];
400 int error;
401
402 if ((error = getnameinfo((struct sockaddr *)addr, addr_len, NULL, 0, sbuf, sizeof(sbuf), NI_NUMERICSERV)) != 0) {
403 av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(error));
404 return -1;
405 }
406
407 return strtol(sbuf, NULL, 10);
408 }
409
410
411 /**
412 * If no filename is given to av_open_input_file because you want to
413 * get the local port first, then you must call this function to set
414 * the remote server address.
415 *
416 * url syntax: udp://host:port[?option=val...]
417 * option: 'ttl=n' : set the ttl value (for multicast only)
418 * 'localport=n' : set the local port
419 * 'pkt_size=n' : set max packet size
420 * 'reuse=1' : enable reusing the socket
421 * 'overrun_nonfatal=1': survive in case of circular buffer overrun
422 *
423 * @param h media file context
424 * @param uri of the remote server
425 * @return zero if no error.
426 */
ff_udp_set_remote_url(URLContext * h,const char * uri)427 int ff_udp_set_remote_url(URLContext *h, const char *uri)
428 {
429 UDPContext *s = h->priv_data;
430 char hostname[256], buf[10];
431 int port;
432 const char *p;
433
434 av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
435
436 /* set the destination address */
437 s->dest_addr_len = udp_set_url(h, &s->dest_addr, hostname, port);
438 if (s->dest_addr_len < 0) {
439 return AVERROR(EIO);
440 }
441 s->is_multicast = ff_is_multicast_address((struct sockaddr*) &s->dest_addr);
442 p = strchr(uri, '?');
443 if (p) {
444 if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
445 int was_connected = s->is_connected;
446 s->is_connected = strtol(buf, NULL, 10);
447 if (s->is_connected && !was_connected) {
448 if (connect(s->udp_fd, (struct sockaddr *) &s->dest_addr,
449 s->dest_addr_len)) {
450 s->is_connected = 0;
451 ff_log_net_error(h, AV_LOG_ERROR, "connect");
452 return AVERROR(EIO);
453 }
454 }
455 }
456 }
457
458 return 0;
459 }
460
461 /**
462 * Return the local port used by the UDP connection
463 * @param h media file context
464 * @return the local port number
465 */
ff_udp_get_local_port(URLContext * h)466 int ff_udp_get_local_port(URLContext *h)
467 {
468 UDPContext *s = h->priv_data;
469 return s->local_port;
470 }
471
472 /**
473 * Return the udp file handle for select() usage to wait for several RTP
474 * streams at the same time.
475 * @param h media file context
476 */
udp_get_file_handle(URLContext * h)477 static int udp_get_file_handle(URLContext *h)
478 {
479 UDPContext *s = h->priv_data;
480 return s->udp_fd;
481 }
482
483 #if HAVE_PTHREAD_CANCEL
circular_buffer_task_rx(void * _URLContext)484 static void *circular_buffer_task_rx( void *_URLContext)
485 {
486 URLContext *h = _URLContext;
487 UDPContext *s = h->priv_data;
488 int old_cancelstate;
489
490 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
491 pthread_mutex_lock(&s->mutex);
492 if (ff_socket_nonblock(s->udp_fd, 0) < 0) {
493 av_log(h, AV_LOG_ERROR, "Failed to set blocking mode");
494 s->circular_buffer_error = AVERROR(EIO);
495 goto end;
496 }
497 while(1) {
498 int len;
499 struct sockaddr_storage addr;
500 socklen_t addr_len = sizeof(addr);
501
502 pthread_mutex_unlock(&s->mutex);
503 /* Blocking operations are always cancellation points;
504 see "General Information" / "Thread Cancelation Overview"
505 in Single Unix. */
506 pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_cancelstate);
507 len = recvfrom(s->udp_fd, s->tmp+4, sizeof(s->tmp)-4, 0, (struct sockaddr *)&addr, &addr_len);
508 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
509 pthread_mutex_lock(&s->mutex);
510 if (len < 0) {
511 if (ff_neterrno() != AVERROR(EAGAIN) && ff_neterrno() != AVERROR(EINTR)) {
512 s->circular_buffer_error = ff_neterrno();
513 goto end;
514 }
515 continue;
516 }
517 if (ff_ip_check_source_lists(&addr, &s->filters))
518 continue;
519 AV_WL32(s->tmp, len);
520
521 if (av_fifo_can_write(s->fifo) < len + 4) {
522 /* No Space left */
523 if (s->overrun_nonfatal) {
524 av_log(h, AV_LOG_WARNING, "Circular buffer overrun. "
525 "Surviving due to overrun_nonfatal option\n");
526 continue;
527 } else {
528 av_log(h, AV_LOG_ERROR, "Circular buffer overrun. "
529 "To avoid, increase fifo_size URL option. "
530 "To survive in such case, use overrun_nonfatal option\n");
531 s->circular_buffer_error = AVERROR(EIO);
532 goto end;
533 }
534 }
535 av_fifo_write(s->fifo, s->tmp, len + 4);
536 pthread_cond_signal(&s->cond);
537 }
538
539 end:
540 pthread_cond_signal(&s->cond);
541 pthread_mutex_unlock(&s->mutex);
542 return NULL;
543 }
544
circular_buffer_task_tx(void * _URLContext)545 static void *circular_buffer_task_tx( void *_URLContext)
546 {
547 URLContext *h = _URLContext;
548 UDPContext *s = h->priv_data;
549 int64_t target_timestamp = av_gettime_relative();
550 int64_t start_timestamp = av_gettime_relative();
551 int64_t sent_bits = 0;
552 int64_t burst_interval = s->bitrate ? (s->burst_bits * 1000000 / s->bitrate) : 0;
553 int64_t max_delay = s->bitrate ? ((int64_t)h->max_packet_size * 8 * 1000000 / s->bitrate + 1) : 0;
554
555 pthread_mutex_lock(&s->mutex);
556
557 if (ff_socket_nonblock(s->udp_fd, 0) < 0) {
558 av_log(h, AV_LOG_ERROR, "Failed to set blocking mode");
559 s->circular_buffer_error = AVERROR(EIO);
560 goto end;
561 }
562
563 for(;;) {
564 int len;
565 const uint8_t *p;
566 uint8_t tmp[4];
567 int64_t timestamp;
568
569 len = av_fifo_can_read(s->fifo);
570
571 while (len<4) {
572 if (s->close_req)
573 goto end;
574 pthread_cond_wait(&s->cond, &s->mutex);
575 len = av_fifo_can_read(s->fifo);
576 }
577
578 av_fifo_read(s->fifo, tmp, 4);
579 len = AV_RL32(tmp);
580
581 av_assert0(len >= 0);
582 av_assert0(len <= sizeof(s->tmp));
583
584 av_fifo_read(s->fifo, s->tmp, len);
585
586 pthread_mutex_unlock(&s->mutex);
587
588 if (s->bitrate) {
589 timestamp = av_gettime_relative();
590 if (timestamp < target_timestamp) {
591 int64_t delay = target_timestamp - timestamp;
592 if (delay > max_delay) {
593 delay = max_delay;
594 start_timestamp = timestamp + delay;
595 sent_bits = 0;
596 }
597 av_usleep(delay);
598 } else {
599 if (timestamp - burst_interval > target_timestamp) {
600 start_timestamp = timestamp - burst_interval;
601 sent_bits = 0;
602 }
603 }
604 sent_bits += len * 8;
605 target_timestamp = start_timestamp + sent_bits * 1000000 / s->bitrate;
606 }
607
608 p = s->tmp;
609 while (len) {
610 int ret;
611 av_assert0(len > 0);
612 if (!s->is_connected) {
613 ret = sendto (s->udp_fd, p, len, 0,
614 (struct sockaddr *) &s->dest_addr,
615 s->dest_addr_len);
616 } else
617 ret = send(s->udp_fd, p, len, 0);
618 if (ret >= 0) {
619 len -= ret;
620 p += ret;
621 } else {
622 ret = ff_neterrno();
623 if (ret != AVERROR(EAGAIN) && ret != AVERROR(EINTR)) {
624 pthread_mutex_lock(&s->mutex);
625 s->circular_buffer_error = ret;
626 pthread_mutex_unlock(&s->mutex);
627 return NULL;
628 }
629 }
630 }
631
632 pthread_mutex_lock(&s->mutex);
633 }
634
635 end:
636 pthread_mutex_unlock(&s->mutex);
637 return NULL;
638 }
639
640
641 #endif
642
643 /* put it in UDP context */
644 /* return non zero if error */
udp_open(URLContext * h,const char * uri,int flags)645 static int udp_open(URLContext *h, const char *uri, int flags)
646 {
647 char hostname[1024];
648 int port, udp_fd = -1, tmp, bind_ret = -1, dscp = -1;
649 UDPContext *s = h->priv_data;
650 int is_output;
651 const char *p;
652 char buf[256];
653 struct sockaddr_storage my_addr;
654 socklen_t len;
655 int ret;
656
657 h->is_streamed = 1;
658
659 is_output = !(flags & AVIO_FLAG_READ);
660 if (s->buffer_size < 0)
661 s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_RX_BUF_SIZE;
662
663 if (s->sources) {
664 if ((ret = ff_ip_parse_sources(h, s->sources, &s->filters)) < 0)
665 goto fail;
666 }
667
668 if (s->block) {
669 if ((ret = ff_ip_parse_blocks(h, s->block, &s->filters)) < 0)
670 goto fail;
671 }
672
673 p = strchr(uri, '?');
674 if (p) {
675 if (av_find_info_tag(buf, sizeof(buf), "reuse", p)) {
676 char *endptr = NULL;
677 s->reuse_socket = strtol(buf, &endptr, 10);
678 /* assume if no digits were found it is a request to enable it */
679 if (buf == endptr)
680 s->reuse_socket = 1;
681 }
682 if (av_find_info_tag(buf, sizeof(buf), "overrun_nonfatal", p)) {
683 char *endptr = NULL;
684 s->overrun_nonfatal = strtol(buf, &endptr, 10);
685 /* assume if no digits were found it is a request to enable it */
686 if (buf == endptr)
687 s->overrun_nonfatal = 1;
688 if (!HAVE_PTHREAD_CANCEL)
689 av_log(h, AV_LOG_WARNING,
690 "'overrun_nonfatal' option was set but it is not supported "
691 "on this build (pthread support is required)\n");
692 }
693 if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) {
694 s->ttl = strtol(buf, NULL, 10);
695 if (s->ttl < 0 || s->ttl > 255) {
696 av_log(h, AV_LOG_ERROR, "ttl(%d) should be in range [0,255]\n", s->ttl);
697 ret = AVERROR(EINVAL);
698 goto fail;
699 }
700 }
701 if (av_find_info_tag(buf, sizeof(buf), "udplite_coverage", p)) {
702 s->udplite_coverage = strtol(buf, NULL, 10);
703 }
704 if (av_find_info_tag(buf, sizeof(buf), "localport", p)) {
705 s->local_port = strtol(buf, NULL, 10);
706 }
707 if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
708 s->pkt_size = strtol(buf, NULL, 10);
709 }
710 if (av_find_info_tag(buf, sizeof(buf), "buffer_size", p)) {
711 s->buffer_size = strtol(buf, NULL, 10);
712 }
713 if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
714 s->is_connected = strtol(buf, NULL, 10);
715 }
716 if (av_find_info_tag(buf, sizeof(buf), "dscp", p)) {
717 dscp = strtol(buf, NULL, 10);
718 }
719 if (av_find_info_tag(buf, sizeof(buf), "fifo_size", p)) {
720 s->circular_buffer_size = strtol(buf, NULL, 10);
721 if (!HAVE_PTHREAD_CANCEL)
722 av_log(h, AV_LOG_WARNING,
723 "'circular_buffer_size' option was set but it is not supported "
724 "on this build (pthread support is required)\n");
725 }
726 if (av_find_info_tag(buf, sizeof(buf), "bitrate", p)) {
727 s->bitrate = strtoll(buf, NULL, 10);
728 if (!HAVE_PTHREAD_CANCEL)
729 av_log(h, AV_LOG_WARNING,
730 "'bitrate' option was set but it is not supported "
731 "on this build (pthread support is required)\n");
732 }
733 if (av_find_info_tag(buf, sizeof(buf), "burst_bits", p)) {
734 s->burst_bits = strtoll(buf, NULL, 10);
735 }
736 if (av_find_info_tag(buf, sizeof(buf), "localaddr", p)) {
737 av_freep(&s->localaddr);
738 s->localaddr = av_strdup(buf);
739 }
740 if (av_find_info_tag(buf, sizeof(buf), "sources", p)) {
741 if ((ret = ff_ip_parse_sources(h, buf, &s->filters)) < 0)
742 goto fail;
743 }
744 if (av_find_info_tag(buf, sizeof(buf), "block", p)) {
745 if ((ret = ff_ip_parse_blocks(h, buf, &s->filters)) < 0)
746 goto fail;
747 }
748 if (!is_output && av_find_info_tag(buf, sizeof(buf), "timeout", p))
749 s->timeout = strtol(buf, NULL, 10);
750 if (is_output && av_find_info_tag(buf, sizeof(buf), "broadcast", p))
751 s->is_broadcast = strtol(buf, NULL, 10);
752 }
753 /* handling needed to support options picking from both AVOption and URL */
754 s->circular_buffer_size *= 188;
755 if (flags & AVIO_FLAG_WRITE) {
756 h->max_packet_size = s->pkt_size;
757 } else {
758 h->max_packet_size = UDP_MAX_PKT_SIZE;
759 }
760 h->rw_timeout = s->timeout;
761
762 /* fill the dest addr */
763 av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
764
765 /* XXX: fix av_url_split */
766 if (hostname[0] == '\0' || hostname[0] == '?') {
767 /* only accepts null hostname if input */
768 if (!(flags & AVIO_FLAG_READ)) {
769 ret = AVERROR(EINVAL);
770 goto fail;
771 }
772 } else {
773 if ((ret = ff_udp_set_remote_url(h, uri)) < 0)
774 goto fail;
775 }
776
777 if ((s->is_multicast || s->local_port <= 0) && (h->flags & AVIO_FLAG_READ))
778 s->local_port = port;
779
780 udp_fd = udp_socket_create(h, &my_addr, &len, s->localaddr);
781 if (udp_fd < 0) {
782 ret = AVERROR(EIO);
783 goto fail;
784 }
785
786 s->local_addr_storage=my_addr; //store for future multicast join
787
788 /* Follow the requested reuse option, unless it's multicast in which
789 * case enable reuse unless explicitly disabled.
790 */
791 if (s->reuse_socket > 0 || (s->is_multicast && s->reuse_socket < 0)) {
792 s->reuse_socket = 1;
793 if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0) {
794 ret = ff_neterrno();
795 goto fail;
796 }
797 }
798
799 if (s->is_broadcast) {
800 #ifdef SO_BROADCAST
801 if (setsockopt (udp_fd, SOL_SOCKET, SO_BROADCAST, &(s->is_broadcast), sizeof(s->is_broadcast)) != 0) {
802 ret = ff_neterrno();
803 goto fail;
804 }
805 #else
806 ret = AVERROR(ENOSYS);
807 goto fail;
808 #endif
809 }
810
811 /* Set the checksum coverage for UDP-Lite (RFC 3828) for sending and receiving.
812 * The receiver coverage has to be less than or equal to the sender coverage.
813 * Otherwise, the receiver will drop all packets.
814 */
815 if (s->udplite_coverage) {
816 if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
817 av_log(h, AV_LOG_WARNING, "socket option UDPLITE_SEND_CSCOV not available");
818
819 if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
820 av_log(h, AV_LOG_WARNING, "socket option UDPLITE_RECV_CSCOV not available");
821 }
822
823 if (dscp >= 0) {
824 dscp <<= 2;
825 if (setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp)) != 0) {
826 ret = ff_neterrno();
827 goto fail;
828 }
829 }
830
831 /* If multicast, try binding the multicast address first, to avoid
832 * receiving UDP packets from other sources aimed at the same UDP
833 * port. This fails on windows. This makes sending to the same address
834 * using sendto() fail, so only do it if we're opened in read-only mode. */
835 if (s->is_multicast && (h->flags & AVIO_FLAG_READ)) {
836 bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
837 }
838 /* bind to the local address if not multicast or if the multicast
839 * bind failed */
840 /* the bind is needed to give a port to the socket now */
841 if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) {
842 ff_log_net_error(h, AV_LOG_ERROR, "bind failed");
843 ret = ff_neterrno();
844 goto fail;
845 }
846
847 len = sizeof(my_addr);
848 getsockname(udp_fd, (struct sockaddr *)&my_addr, &len);
849 s->local_port = udp_port(&my_addr, len);
850
851 if (s->is_multicast) {
852 if (h->flags & AVIO_FLAG_WRITE) {
853 /* output */
854 if ((ret = udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr, h)) < 0)
855 goto fail;
856 }
857 if (h->flags & AVIO_FLAG_READ) {
858 /* input */
859 if (s->filters.nb_include_addrs) {
860 if ((ret = udp_set_multicast_sources(h, udp_fd,
861 (struct sockaddr *)&s->dest_addr,
862 s->dest_addr_len, &s->local_addr_storage,
863 s->filters.include_addrs,
864 s->filters.nb_include_addrs, 1)) < 0)
865 goto fail;
866 } else {
867 if ((ret = udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr,
868 (struct sockaddr *)&s->local_addr_storage, h)) < 0)
869 goto fail;
870 }
871 if (s->filters.nb_exclude_addrs) {
872 if ((ret = udp_set_multicast_sources(h, udp_fd,
873 (struct sockaddr *)&s->dest_addr,
874 s->dest_addr_len, &s->local_addr_storage,
875 s->filters.exclude_addrs,
876 s->filters.nb_exclude_addrs, 0)) < 0)
877 goto fail;
878 }
879 }
880 }
881
882 if (is_output) {
883 /* limit the tx buf size to limit latency */
884 tmp = s->buffer_size;
885 if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
886 ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)");
887 ret = ff_neterrno();
888 goto fail;
889 }
890 } else {
891 /* set udp recv buffer size to the requested value (default UDP_RX_BUF_SIZE) */
892 tmp = s->buffer_size;
893 if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) {
894 ff_log_net_error(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF)");
895 }
896 len = sizeof(tmp);
897 if (getsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, &len) < 0) {
898 ff_log_net_error(h, AV_LOG_WARNING, "getsockopt(SO_RCVBUF)");
899 } else {
900 av_log(h, AV_LOG_DEBUG, "end receive buffer size reported is %d\n", tmp);
901 if(tmp < s->buffer_size)
902 av_log(h, AV_LOG_WARNING, "attempted to set receive buffer to size %d but it only ended up set as %d\n", s->buffer_size, tmp);
903 }
904
905 /* make the socket non-blocking */
906 ff_socket_nonblock(udp_fd, 1);
907 }
908 if (s->is_connected) {
909 if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) {
910 ff_log_net_error(h, AV_LOG_ERROR, "connect");
911 ret = ff_neterrno();
912 goto fail;
913 }
914 }
915
916 s->udp_fd = udp_fd;
917
918 #if HAVE_PTHREAD_CANCEL
919 /*
920 Create thread in case of:
921 1. Input and circular_buffer_size is set
922 2. Output and bitrate and circular_buffer_size is set
923 */
924
925 if (is_output && s->bitrate && !s->circular_buffer_size) {
926 /* Warn user in case of 'circular_buffer_size' is not set */
927 av_log(h, AV_LOG_WARNING,"'bitrate' option was set but 'circular_buffer_size' is not, but required\n");
928 }
929
930 if ((!is_output && s->circular_buffer_size) || (is_output && s->bitrate && s->circular_buffer_size)) {
931 /* start the task going */
932 s->fifo = av_fifo_alloc2(s->circular_buffer_size, 1, 0);
933 if (!s->fifo) {
934 ret = AVERROR(ENOMEM);
935 goto fail;
936 }
937 ret = pthread_mutex_init(&s->mutex, NULL);
938 if (ret != 0) {
939 av_log(h, AV_LOG_ERROR, "pthread_mutex_init failed : %s\n", strerror(ret));
940 ret = AVERROR(ret);
941 goto fail;
942 }
943 ret = pthread_cond_init(&s->cond, NULL);
944 if (ret != 0) {
945 av_log(h, AV_LOG_ERROR, "pthread_cond_init failed : %s\n", strerror(ret));
946 ret = AVERROR(ret);
947 goto cond_fail;
948 }
949 ret = pthread_create(&s->circular_buffer_thread, NULL, is_output?circular_buffer_task_tx:circular_buffer_task_rx, h);
950 if (ret != 0) {
951 av_log(h, AV_LOG_ERROR, "pthread_create failed : %s\n", strerror(ret));
952 ret = AVERROR(ret);
953 goto thread_fail;
954 }
955 s->thread_started = 1;
956 }
957 #endif
958
959 return 0;
960 #if HAVE_PTHREAD_CANCEL
961 thread_fail:
962 pthread_cond_destroy(&s->cond);
963 cond_fail:
964 pthread_mutex_destroy(&s->mutex);
965 #endif
966 fail:
967 if (udp_fd >= 0)
968 closesocket(udp_fd);
969 av_fifo_freep2(&s->fifo);
970 ff_ip_reset_filters(&s->filters);
971 return ret;
972 }
973
udplite_open(URLContext * h,const char * uri,int flags)974 static int udplite_open(URLContext *h, const char *uri, int flags)
975 {
976 UDPContext *s = h->priv_data;
977
978 // set default checksum coverage
979 s->udplite_coverage = UDP_HEADER_SIZE;
980
981 return udp_open(h, uri, flags);
982 }
983
udp_read(URLContext * h,uint8_t * buf,int size)984 static int udp_read(URLContext *h, uint8_t *buf, int size)
985 {
986 UDPContext *s = h->priv_data;
987 int ret;
988 struct sockaddr_storage addr;
989 socklen_t addr_len = sizeof(addr);
990 #if HAVE_PTHREAD_CANCEL
991 int avail, nonblock = h->flags & AVIO_FLAG_NONBLOCK;
992
993 if (s->fifo) {
994 pthread_mutex_lock(&s->mutex);
995 do {
996 avail = av_fifo_can_read(s->fifo);
997 if (avail) { // >=size) {
998 uint8_t tmp[4];
999
1000 av_fifo_read(s->fifo, tmp, 4);
1001 avail = AV_RL32(tmp);
1002 if(avail > size){
1003 av_log(h, AV_LOG_WARNING, "Part of datagram lost due to insufficient buffer size\n");
1004 avail = size;
1005 }
1006
1007 av_fifo_read(s->fifo, buf, avail);
1008 av_fifo_drain2(s->fifo, AV_RL32(tmp) - avail);
1009 pthread_mutex_unlock(&s->mutex);
1010 return avail;
1011 } else if(s->circular_buffer_error){
1012 int err = s->circular_buffer_error;
1013 pthread_mutex_unlock(&s->mutex);
1014 return err;
1015 } else if(nonblock) {
1016 pthread_mutex_unlock(&s->mutex);
1017 return AVERROR(EAGAIN);
1018 } else {
1019 /* FIXME: using the monotonic clock would be better,
1020 but it does not exist on all supported platforms. */
1021 int64_t t = av_gettime() + 100000;
1022 struct timespec tv = { .tv_sec = t / 1000000,
1023 .tv_nsec = (t % 1000000) * 1000 };
1024 int err = pthread_cond_timedwait(&s->cond, &s->mutex, &tv);
1025 if (err) {
1026 pthread_mutex_unlock(&s->mutex);
1027 return AVERROR(err == ETIMEDOUT ? EAGAIN : err);
1028 }
1029 nonblock = 1;
1030 }
1031 } while(1);
1032 }
1033 #endif
1034
1035 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
1036 ret = ff_network_wait_fd(s->udp_fd, 0);
1037 if (ret < 0)
1038 return ret;
1039 }
1040 ret = recvfrom(s->udp_fd, buf, size, 0, (struct sockaddr *)&addr, &addr_len);
1041 if (ret < 0)
1042 return ff_neterrno();
1043 if (ff_ip_check_source_lists(&addr, &s->filters))
1044 return AVERROR(EINTR);
1045 return ret;
1046 }
1047
udp_write(URLContext * h,const uint8_t * buf,int size)1048 static int udp_write(URLContext *h, const uint8_t *buf, int size)
1049 {
1050 UDPContext *s = h->priv_data;
1051 int ret;
1052
1053 #if HAVE_PTHREAD_CANCEL
1054 if (s->fifo) {
1055 uint8_t tmp[4];
1056
1057 pthread_mutex_lock(&s->mutex);
1058
1059 /*
1060 Return error if last tx failed.
1061 Here we can't know on which packet error was, but it needs to know that error exists.
1062 */
1063 if (s->circular_buffer_error<0) {
1064 int err = s->circular_buffer_error;
1065 pthread_mutex_unlock(&s->mutex);
1066 return err;
1067 }
1068
1069 if (av_fifo_can_write(s->fifo) < size + 4) {
1070 /* What about a partial packet tx ? */
1071 pthread_mutex_unlock(&s->mutex);
1072 return AVERROR(ENOMEM);
1073 }
1074 AV_WL32(tmp, size);
1075 av_fifo_write(s->fifo, tmp, 4); /* size of packet */
1076 av_fifo_write(s->fifo, buf, size); /* the data */
1077 pthread_cond_signal(&s->cond);
1078 pthread_mutex_unlock(&s->mutex);
1079 return size;
1080 }
1081 #endif
1082 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
1083 ret = ff_network_wait_fd(s->udp_fd, 1);
1084 if (ret < 0)
1085 return ret;
1086 }
1087
1088 if (!s->is_connected) {
1089 ret = sendto (s->udp_fd, buf, size, 0,
1090 (struct sockaddr *) &s->dest_addr,
1091 s->dest_addr_len);
1092 } else
1093 ret = send(s->udp_fd, buf, size, 0);
1094
1095 return ret < 0 ? ff_neterrno() : ret;
1096 }
1097
udp_close(URLContext * h)1098 static int udp_close(URLContext *h)
1099 {
1100 UDPContext *s = h->priv_data;
1101
1102 #if HAVE_PTHREAD_CANCEL
1103 // Request close once writing is finished
1104 if (s->thread_started && !(h->flags & AVIO_FLAG_READ)) {
1105 pthread_mutex_lock(&s->mutex);
1106 s->close_req = 1;
1107 pthread_cond_signal(&s->cond);
1108 pthread_mutex_unlock(&s->mutex);
1109 }
1110 #endif
1111
1112 if (s->is_multicast && (h->flags & AVIO_FLAG_READ))
1113 udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr,
1114 (struct sockaddr *)&s->local_addr_storage, h);
1115 #if HAVE_PTHREAD_CANCEL
1116 if (s->thread_started) {
1117 int ret;
1118 // Cancel only read, as write has been signaled as success to the user
1119 if (h->flags & AVIO_FLAG_READ) {
1120 #ifdef _WIN32
1121 /* recvfrom() is not a cancellation point for win32, so we shutdown
1122 * the socket and abort pending IO, subsequent recvfrom() calls
1123 * will fail with WSAESHUTDOWN causing the thread to exit. */
1124 shutdown(s->udp_fd, SD_RECEIVE);
1125 CancelIoEx((HANDLE)(SOCKET)s->udp_fd, NULL);
1126 #else
1127 pthread_cancel(s->circular_buffer_thread);
1128 #endif
1129 }
1130 ret = pthread_join(s->circular_buffer_thread, NULL);
1131 if (ret != 0)
1132 av_log(h, AV_LOG_ERROR, "pthread_join(): %s\n", strerror(ret));
1133 pthread_mutex_destroy(&s->mutex);
1134 pthread_cond_destroy(&s->cond);
1135 }
1136 #endif
1137 closesocket(s->udp_fd);
1138 av_fifo_freep2(&s->fifo);
1139 ff_ip_reset_filters(&s->filters);
1140 return 0;
1141 }
1142
1143 const URLProtocol ff_udp_protocol = {
1144 .name = "udp",
1145 .url_open = udp_open,
1146 .url_read = udp_read,
1147 .url_write = udp_write,
1148 .url_close = udp_close,
1149 .url_get_file_handle = udp_get_file_handle,
1150 .priv_data_size = sizeof(UDPContext),
1151 .priv_data_class = &udp_class,
1152 .flags = URL_PROTOCOL_FLAG_NETWORK,
1153 };
1154
1155 const URLProtocol ff_udplite_protocol = {
1156 .name = "udplite",
1157 .url_open = udplite_open,
1158 .url_read = udp_read,
1159 .url_write = udp_write,
1160 .url_close = udp_close,
1161 .url_get_file_handle = udp_get_file_handle,
1162 .priv_data_size = sizeof(UDPContext),
1163 .priv_data_class = &udplite_context_class,
1164 .flags = URL_PROTOCOL_FLAG_NETWORK,
1165 };
1166