FFmpeg  4.3.7
udp.c
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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;
89  int pkt_size;
98 
99  /* Circular Buffer variables for use in UDP receive code */
103  int64_t bitrate; /* number of bits to send per second */
104  int64_t burst_bits;
106 #if HAVE_PTHREAD_CANCEL
107  pthread_t circular_buffer_thread;
110  int thread_started;
111 #endif
114  char *localaddr;
115  int timeout;
117  char *sources;
118  char *block;
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, INT_MAX, 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 (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 
155  .class_name = "udplite",
156  .item_name = av_default_item_name,
157  .option = options,
158  .version = LIBAVUTIL_VERSION_INT,
159 };
160 
161 static int udp_set_multicast_ttl(int sockfd, int mcastTTL,
162  struct sockaddr *addr)
163 {
164 #ifdef IP_MULTICAST_TTL
165  if (addr->sa_family == AF_INET) {
166  if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) {
167  ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_MULTICAST_TTL)");
168  return -1;
169  }
170  }
171 #endif
172 #if defined(IPPROTO_IPV6) && defined(IPV6_MULTICAST_HOPS)
173  if (addr->sa_family == AF_INET6) {
174  if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) {
175  ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_MULTICAST_HOPS)");
176  return -1;
177  }
178  }
179 #endif
180  return 0;
181 }
182 
183 static int udp_join_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr)
184 {
185 #ifdef IP_ADD_MEMBERSHIP
186  if (addr->sa_family == AF_INET) {
187  struct ip_mreq mreq;
188 
189  mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
190  if (local_addr)
191  mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
192  else
193  mreq.imr_interface.s_addr= INADDR_ANY;
194  if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
195  ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP)");
196  return -1;
197  }
198  }
199 #endif
200 #if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
201  if (addr->sa_family == AF_INET6) {
202  struct ipv6_mreq mreq6;
203 
204  memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
205  //TODO: Interface index should be looked up from local_addr
206  mreq6.ipv6mr_interface= 0;
207  if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
208  ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_ADD_MEMBERSHIP)");
209  return -1;
210  }
211  }
212 #endif
213  return 0;
214 }
215 
216 static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr)
217 {
218 #ifdef IP_DROP_MEMBERSHIP
219  if (addr->sa_family == AF_INET) {
220  struct ip_mreq mreq;
221 
222  mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
223  if (local_addr)
224  mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
225  else
226  mreq.imr_interface.s_addr= INADDR_ANY;
227  if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
228  ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP)");
229  return -1;
230  }
231  }
232 #endif
233 #if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
234  if (addr->sa_family == AF_INET6) {
235  struct ipv6_mreq mreq6;
236 
237  memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
238  //TODO: Interface index should be looked up from local_addr
239  mreq6.ipv6mr_interface= 0;
240  if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
241  ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_DROP_MEMBERSHIP)");
242  return -1;
243  }
244  }
245 #endif
246  return 0;
247 }
248 
250  int sockfd, struct sockaddr *addr,
251  int addr_len, struct sockaddr_storage *local_addr,
252  struct sockaddr_storage *sources,
253  int nb_sources, int include)
254 {
255  int i;
256  if (addr->sa_family != AF_INET) {
257 #if HAVE_STRUCT_GROUP_SOURCE_REQ && defined(MCAST_BLOCK_SOURCE)
258  /* For IPv4 prefer the old approach, as that alone works reliably on
259  * Windows and it also supports supplying the interface based on its
260  * address. */
261  int i;
262  for (i = 0; i < nb_sources; i++) {
263  struct group_source_req mreqs;
264  int level = addr->sa_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
265 
266  //TODO: Interface index should be looked up from local_addr
267  mreqs.gsr_interface = 0;
268  memcpy(&mreqs.gsr_group, addr, addr_len);
269  memcpy(&mreqs.gsr_source, &sources[i], sizeof(*sources));
270 
271  if (setsockopt(sockfd, level,
272  include ? MCAST_JOIN_SOURCE_GROUP : MCAST_BLOCK_SOURCE,
273  (const void *)&mreqs, sizeof(mreqs)) < 0) {
274  if (include)
275  ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_JOIN_SOURCE_GROUP)");
276  else
277  ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_BLOCK_SOURCE)");
278  return ff_neterrno();
279  }
280  }
281  return 0;
282 #else
283  av_log(h, AV_LOG_ERROR,
284  "Setting multicast sources only supported for IPv4\n");
285  return AVERROR(EINVAL);
286 #endif
287  }
288 #if HAVE_STRUCT_IP_MREQ_SOURCE && defined(IP_BLOCK_SOURCE)
289  for (i = 0; i < nb_sources; i++) {
290  struct ip_mreq_source mreqs;
291  if (sources[i].ss_family != AF_INET) {
292  av_log(h, AV_LOG_ERROR, "Source/block address %d is of incorrect protocol family\n", i + 1);
293  return AVERROR(EINVAL);
294  }
295 
296  mreqs.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
297  if (local_addr)
298  mreqs.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
299  else
300  mreqs.imr_interface.s_addr= INADDR_ANY;
301  mreqs.imr_sourceaddr.s_addr = ((struct sockaddr_in *)&sources[i])->sin_addr.s_addr;
302 
303  if (setsockopt(sockfd, IPPROTO_IP,
304  include ? IP_ADD_SOURCE_MEMBERSHIP : IP_BLOCK_SOURCE,
305  (const void *)&mreqs, sizeof(mreqs)) < 0) {
306  if (include)
307  ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(IP_ADD_SOURCE_MEMBERSHIP)");
308  else
309  ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(IP_BLOCK_SOURCE)");
310  return ff_neterrno();
311  }
312  }
313 #else
314  return AVERROR(ENOSYS);
315 #endif
316  return 0;
317 }
319  struct sockaddr_storage *addr,
320  const char *hostname, int port)
321 {
322  struct addrinfo *res0;
323  int addr_len;
324 
325  res0 = ff_ip_resolve_host(h, hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
326  if (!res0) return AVERROR(EIO);
327  memcpy(addr, res0->ai_addr, res0->ai_addrlen);
328  addr_len = res0->ai_addrlen;
329  freeaddrinfo(res0);
330 
331  return addr_len;
332 }
333 
334 static int udp_socket_create(URLContext *h, struct sockaddr_storage *addr,
335  socklen_t *addr_len, const char *localaddr)
336 {
337  UDPContext *s = h->priv_data;
338  int udp_fd = -1;
339  struct addrinfo *res0, *res;
340  int family = AF_UNSPEC;
341 
342  if (((struct sockaddr *) &s->dest_addr)->sa_family)
343  family = ((struct sockaddr *) &s->dest_addr)->sa_family;
344  res0 = ff_ip_resolve_host(h, (localaddr && localaddr[0]) ? localaddr : NULL,
345  s->local_port,
346  SOCK_DGRAM, family, AI_PASSIVE);
347  if (!res0)
348  goto fail;
349  for (res = res0; res; res=res->ai_next) {
350  if (s->udplite_coverage)
351  udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, IPPROTO_UDPLITE);
352  else
353  udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, 0);
354  if (udp_fd != -1) break;
355  ff_log_net_error(NULL, AV_LOG_ERROR, "socket");
356  }
357 
358  if (udp_fd < 0)
359  goto fail;
360 
361  memcpy(addr, res->ai_addr, res->ai_addrlen);
362  *addr_len = res->ai_addrlen;
363 
364  freeaddrinfo(res0);
365 
366  return udp_fd;
367 
368  fail:
369  if (udp_fd >= 0)
370  closesocket(udp_fd);
371  if(res0)
372  freeaddrinfo(res0);
373  return -1;
374 }
375 
376 static int udp_port(struct sockaddr_storage *addr, int addr_len)
377 {
378  char sbuf[sizeof(int)*3+1];
379  int error;
380 
381  if ((error = getnameinfo((struct sockaddr *)addr, addr_len, NULL, 0, sbuf, sizeof(sbuf), NI_NUMERICSERV)) != 0) {
382  av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(error));
383  return -1;
384  }
385 
386  return strtol(sbuf, NULL, 10);
387 }
388 
389 
390 /**
391  * If no filename is given to av_open_input_file because you want to
392  * get the local port first, then you must call this function to set
393  * the remote server address.
394  *
395  * url syntax: udp://host:port[?option=val...]
396  * option: 'ttl=n' : set the ttl value (for multicast only)
397  * 'localport=n' : set the local port
398  * 'pkt_size=n' : set max packet size
399  * 'reuse=1' : enable reusing the socket
400  * 'overrun_nonfatal=1': survive in case of circular buffer overrun
401  *
402  * @param h media file context
403  * @param uri of the remote server
404  * @return zero if no error.
405  */
406 int ff_udp_set_remote_url(URLContext *h, const char *uri)
407 {
408  UDPContext *s = h->priv_data;
409  char hostname[256], buf[10];
410  int port;
411  const char *p;
412 
413  av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
414 
415  /* set the destination address */
416  s->dest_addr_len = udp_set_url(h, &s->dest_addr, hostname, port);
417  if (s->dest_addr_len < 0) {
418  return AVERROR(EIO);
419  }
420  s->is_multicast = ff_is_multicast_address((struct sockaddr*) &s->dest_addr);
421  p = strchr(uri, '?');
422  if (p) {
423  if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
424  int was_connected = s->is_connected;
425  s->is_connected = strtol(buf, NULL, 10);
426  if (s->is_connected && !was_connected) {
427  if (connect(s->udp_fd, (struct sockaddr *) &s->dest_addr,
428  s->dest_addr_len)) {
429  s->is_connected = 0;
430  ff_log_net_error(h, AV_LOG_ERROR, "connect");
431  return AVERROR(EIO);
432  }
433  }
434  }
435  }
436 
437  return 0;
438 }
439 
440 /**
441  * Return the local port used by the UDP connection
442  * @param h media file context
443  * @return the local port number
444  */
446 {
447  UDPContext *s = h->priv_data;
448  return s->local_port;
449 }
450 
451 /**
452  * Return the udp file handle for select() usage to wait for several RTP
453  * streams at the same time.
454  * @param h media file context
455  */
457 {
458  UDPContext *s = h->priv_data;
459  return s->udp_fd;
460 }
461 
462 #if HAVE_PTHREAD_CANCEL
463 static void *circular_buffer_task_rx( void *_URLContext)
464 {
465  URLContext *h = _URLContext;
466  UDPContext *s = h->priv_data;
467  int old_cancelstate;
468 
470  pthread_mutex_lock(&s->mutex);
471  if (ff_socket_nonblock(s->udp_fd, 0) < 0) {
472  av_log(h, AV_LOG_ERROR, "Failed to set blocking mode");
473  s->circular_buffer_error = AVERROR(EIO);
474  goto end;
475  }
476  while(1) {
477  int len;
478  struct sockaddr_storage addr;
479  socklen_t addr_len = sizeof(addr);
480 
481  pthread_mutex_unlock(&s->mutex);
482  /* Blocking operations are always cancellation points;
483  see "General Information" / "Thread Cancelation Overview"
484  in Single Unix. */
486  len = recvfrom(s->udp_fd, s->tmp+4, sizeof(s->tmp)-4, 0, (struct sockaddr *)&addr, &addr_len);
488  pthread_mutex_lock(&s->mutex);
489  if (len < 0) {
490  if (ff_neterrno() != AVERROR(EAGAIN) && ff_neterrno() != AVERROR(EINTR)) {
492  goto end;
493  }
494  continue;
495  }
496  if (ff_ip_check_source_lists(&addr, &s->filters))
497  continue;
498  AV_WL32(s->tmp, len);
499 
500  if(av_fifo_space(s->fifo) < len + 4) {
501  /* No Space left */
502  if (s->overrun_nonfatal) {
503  av_log(h, AV_LOG_WARNING, "Circular buffer overrun. "
504  "Surviving due to overrun_nonfatal option\n");
505  continue;
506  } else {
507  av_log(h, AV_LOG_ERROR, "Circular buffer overrun. "
508  "To avoid, increase fifo_size URL option. "
509  "To survive in such case, use overrun_nonfatal option\n");
510  s->circular_buffer_error = AVERROR(EIO);
511  goto end;
512  }
513  }
514  av_fifo_generic_write(s->fifo, s->tmp, len+4, NULL);
515  pthread_cond_signal(&s->cond);
516  }
517 
518 end:
519  pthread_cond_signal(&s->cond);
520  pthread_mutex_unlock(&s->mutex);
521  return NULL;
522 }
523 
524 static void *circular_buffer_task_tx( void *_URLContext)
525 {
526  URLContext *h = _URLContext;
527  UDPContext *s = h->priv_data;
528  int64_t target_timestamp = av_gettime_relative();
529  int64_t start_timestamp = av_gettime_relative();
530  int64_t sent_bits = 0;
531  int64_t burst_interval = s->bitrate ? (s->burst_bits * 1000000 / s->bitrate) : 0;
532  int64_t max_delay = s->bitrate ? ((int64_t)h->max_packet_size * 8 * 1000000 / s->bitrate + 1) : 0;
533 
534  pthread_mutex_lock(&s->mutex);
535 
536  if (ff_socket_nonblock(s->udp_fd, 0) < 0) {
537  av_log(h, AV_LOG_ERROR, "Failed to set blocking mode");
538  s->circular_buffer_error = AVERROR(EIO);
539  goto end;
540  }
541 
542  for(;;) {
543  int len;
544  const uint8_t *p;
545  uint8_t tmp[4];
546  int64_t timestamp;
547 
548  len=av_fifo_size(s->fifo);
549 
550  while (len<4) {
551  if (s->close_req)
552  goto end;
553  if (pthread_cond_wait(&s->cond, &s->mutex) < 0) {
554  goto end;
555  }
556  len=av_fifo_size(s->fifo);
557  }
558 
559  av_fifo_generic_read(s->fifo, tmp, 4, NULL);
560  len=AV_RL32(tmp);
561 
562  av_assert0(len >= 0);
563  av_assert0(len <= sizeof(s->tmp));
564 
565  av_fifo_generic_read(s->fifo, s->tmp, len, NULL);
566 
567  pthread_mutex_unlock(&s->mutex);
568 
569  if (s->bitrate) {
570  timestamp = av_gettime_relative();
571  if (timestamp < target_timestamp) {
572  int64_t delay = target_timestamp - timestamp;
573  if (delay > max_delay) {
574  delay = max_delay;
575  start_timestamp = timestamp + delay;
576  sent_bits = 0;
577  }
578  av_usleep(delay);
579  } else {
580  if (timestamp - burst_interval > target_timestamp) {
581  start_timestamp = timestamp - burst_interval;
582  sent_bits = 0;
583  }
584  }
585  sent_bits += len * 8;
586  target_timestamp = start_timestamp + sent_bits * 1000000 / s->bitrate;
587  }
588 
589  p = s->tmp;
590  while (len) {
591  int ret;
592  av_assert0(len > 0);
593  if (!s->is_connected) {
594  ret = sendto (s->udp_fd, p, len, 0,
595  (struct sockaddr *) &s->dest_addr,
596  s->dest_addr_len);
597  } else
598  ret = send(s->udp_fd, p, len, 0);
599  if (ret >= 0) {
600  len -= ret;
601  p += ret;
602  } else {
603  ret = ff_neterrno();
604  if (ret != AVERROR(EAGAIN) && ret != AVERROR(EINTR)) {
605  pthread_mutex_lock(&s->mutex);
606  s->circular_buffer_error = ret;
607  pthread_mutex_unlock(&s->mutex);
608  return NULL;
609  }
610  }
611  }
612 
613  pthread_mutex_lock(&s->mutex);
614  }
615 
616 end:
617  pthread_mutex_unlock(&s->mutex);
618  return NULL;
619 }
620 
621 
622 #endif
623 
624 /* put it in UDP context */
625 /* return non zero if error */
626 static int udp_open(URLContext *h, const char *uri, int flags)
627 {
628  char hostname[1024], localaddr[1024] = "";
629  int port, udp_fd = -1, tmp, bind_ret = -1, dscp = -1;
630  UDPContext *s = h->priv_data;
631  int is_output;
632  const char *p;
633  char buf[256];
634  struct sockaddr_storage my_addr;
635  socklen_t len;
636 
637  h->is_streamed = 1;
638 
639  is_output = !(flags & AVIO_FLAG_READ);
640  if (s->buffer_size < 0)
641  s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_RX_BUF_SIZE;
642 
643  if (s->sources) {
644  if (ff_ip_parse_sources(h, s->sources, &s->filters) < 0)
645  goto fail;
646  }
647 
648  if (s->block) {
649  if (ff_ip_parse_blocks(h, s->block, &s->filters) < 0)
650  goto fail;
651  }
652 
653  if (s->pkt_size > 0)
654  h->max_packet_size = s->pkt_size;
655 
656  p = strchr(uri, '?');
657  if (p) {
658  if (av_find_info_tag(buf, sizeof(buf), "reuse", p)) {
659  char *endptr = NULL;
660  s->reuse_socket = strtol(buf, &endptr, 10);
661  /* assume if no digits were found it is a request to enable it */
662  if (buf == endptr)
663  s->reuse_socket = 1;
664  }
665  if (av_find_info_tag(buf, sizeof(buf), "overrun_nonfatal", p)) {
666  char *endptr = NULL;
667  s->overrun_nonfatal = strtol(buf, &endptr, 10);
668  /* assume if no digits were found it is a request to enable it */
669  if (buf == endptr)
670  s->overrun_nonfatal = 1;
671  if (!HAVE_PTHREAD_CANCEL)
673  "'overrun_nonfatal' option was set but it is not supported "
674  "on this build (pthread support is required)\n");
675  }
676  if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) {
677  s->ttl = strtol(buf, NULL, 10);
678  }
679  if (av_find_info_tag(buf, sizeof(buf), "udplite_coverage", p)) {
680  s->udplite_coverage = strtol(buf, NULL, 10);
681  }
682  if (av_find_info_tag(buf, sizeof(buf), "localport", p)) {
683  s->local_port = strtol(buf, NULL, 10);
684  }
685  if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
686  s->pkt_size = strtol(buf, NULL, 10);
687  }
688  if (av_find_info_tag(buf, sizeof(buf), "buffer_size", p)) {
689  s->buffer_size = strtol(buf, NULL, 10);
690  }
691  if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
692  s->is_connected = strtol(buf, NULL, 10);
693  }
694  if (av_find_info_tag(buf, sizeof(buf), "dscp", p)) {
695  dscp = strtol(buf, NULL, 10);
696  }
697  if (av_find_info_tag(buf, sizeof(buf), "fifo_size", p)) {
698  s->circular_buffer_size = strtol(buf, NULL, 10);
699  if (!HAVE_PTHREAD_CANCEL)
701  "'circular_buffer_size' option was set but it is not supported "
702  "on this build (pthread support is required)\n");
703  }
704  if (av_find_info_tag(buf, sizeof(buf), "bitrate", p)) {
705  s->bitrate = strtoll(buf, NULL, 10);
706  if (!HAVE_PTHREAD_CANCEL)
708  "'bitrate' option was set but it is not supported "
709  "on this build (pthread support is required)\n");
710  }
711  if (av_find_info_tag(buf, sizeof(buf), "burst_bits", p)) {
712  s->burst_bits = strtoll(buf, NULL, 10);
713  }
714  if (av_find_info_tag(buf, sizeof(buf), "localaddr", p)) {
715  av_strlcpy(localaddr, buf, sizeof(localaddr));
716  }
717  if (av_find_info_tag(buf, sizeof(buf), "sources", p)) {
718  if (ff_ip_parse_sources(h, buf, &s->filters) < 0)
719  goto fail;
720  }
721  if (av_find_info_tag(buf, sizeof(buf), "block", p)) {
722  if (ff_ip_parse_blocks(h, buf, &s->filters) < 0)
723  goto fail;
724  }
725  if (!is_output && av_find_info_tag(buf, sizeof(buf), "timeout", p))
726  s->timeout = strtol(buf, NULL, 10);
727  if (is_output && av_find_info_tag(buf, sizeof(buf), "broadcast", p))
728  s->is_broadcast = strtol(buf, NULL, 10);
729  }
730  /* handling needed to support options picking from both AVOption and URL */
731  s->circular_buffer_size *= 188;
732  if (flags & AVIO_FLAG_WRITE) {
733  h->max_packet_size = s->pkt_size;
734  } else {
736  }
737  h->rw_timeout = s->timeout;
738 
739  /* fill the dest addr */
740  av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
741 
742  /* XXX: fix av_url_split */
743  if (hostname[0] == '\0' || hostname[0] == '?') {
744  /* only accepts null hostname if input */
745  if (!(flags & AVIO_FLAG_READ))
746  goto fail;
747  } else {
748  if (ff_udp_set_remote_url(h, uri) < 0)
749  goto fail;
750  }
751 
752  if ((s->is_multicast || s->local_port <= 0) && (h->flags & AVIO_FLAG_READ))
753  s->local_port = port;
754 
755  if (localaddr[0])
756  udp_fd = udp_socket_create(h, &my_addr, &len, localaddr);
757  else
758  udp_fd = udp_socket_create(h, &my_addr, &len, s->localaddr);
759  if (udp_fd < 0)
760  goto fail;
761 
762  s->local_addr_storage=my_addr; //store for future multicast join
763 
764  /* Follow the requested reuse option, unless it's multicast in which
765  * case enable reuse unless explicitly disabled.
766  */
767  if (s->reuse_socket > 0 || (s->is_multicast && s->reuse_socket < 0)) {
768  s->reuse_socket = 1;
769  if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
770  goto fail;
771  }
772 
773  if (s->is_broadcast) {
774 #ifdef SO_BROADCAST
775  if (setsockopt (udp_fd, SOL_SOCKET, SO_BROADCAST, &(s->is_broadcast), sizeof(s->is_broadcast)) != 0)
776 #endif
777  goto fail;
778  }
779 
780  /* Set the checksum coverage for UDP-Lite (RFC 3828) for sending and receiving.
781  * The receiver coverage has to be less than or equal to the sender coverage.
782  * Otherwise, the receiver will drop all packets.
783  */
784  if (s->udplite_coverage) {
785  if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
786  av_log(h, AV_LOG_WARNING, "socket option UDPLITE_SEND_CSCOV not available");
787 
788  if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
789  av_log(h, AV_LOG_WARNING, "socket option UDPLITE_RECV_CSCOV not available");
790  }
791 
792  if (dscp >= 0) {
793  dscp <<= 2;
794  if (setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp)) != 0)
795  goto fail;
796  }
797 
798  /* If multicast, try binding the multicast address first, to avoid
799  * receiving UDP packets from other sources aimed at the same UDP
800  * port. This fails on windows. This makes sending to the same address
801  * using sendto() fail, so only do it if we're opened in read-only mode. */
802  if (s->is_multicast && (h->flags & AVIO_FLAG_READ)) {
803  bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
804  }
805  /* bind to the local address if not multicast or if the multicast
806  * bind failed */
807  /* the bind is needed to give a port to the socket now */
808  if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) {
809  ff_log_net_error(h, AV_LOG_ERROR, "bind failed");
810  goto fail;
811  }
812 
813  len = sizeof(my_addr);
814  getsockname(udp_fd, (struct sockaddr *)&my_addr, &len);
815  s->local_port = udp_port(&my_addr, len);
816 
817  if (s->is_multicast) {
818  if (h->flags & AVIO_FLAG_WRITE) {
819  /* output */
820  if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
821  goto fail;
822  }
823  if (h->flags & AVIO_FLAG_READ) {
824  /* input */
825  if (s->filters.nb_include_addrs) {
826  if (udp_set_multicast_sources(h, udp_fd,
827  (struct sockaddr *)&s->dest_addr,
830  s->filters.nb_include_addrs, 1) < 0)
831  goto fail;
832  } else {
833  if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage) < 0)
834  goto fail;
835  }
836  if (s->filters.nb_exclude_addrs) {
837  if (udp_set_multicast_sources(h, udp_fd,
838  (struct sockaddr *)&s->dest_addr,
841  s->filters.nb_exclude_addrs, 0) < 0)
842  goto fail;
843  }
844  }
845  }
846 
847  if (is_output) {
848  /* limit the tx buf size to limit latency */
849  tmp = s->buffer_size;
850  if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
851  ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)");
852  goto fail;
853  }
854  } else {
855  /* set udp recv buffer size to the requested value (default 64K) */
856  tmp = s->buffer_size;
857  if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) {
858  ff_log_net_error(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF)");
859  }
860  len = sizeof(tmp);
861  if (getsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, &len) < 0) {
862  ff_log_net_error(h, AV_LOG_WARNING, "getsockopt(SO_RCVBUF)");
863  } else {
864  av_log(h, AV_LOG_DEBUG, "end receive buffer size reported is %d\n", tmp);
865  if(tmp < s->buffer_size)
866  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);
867  }
868 
869  /* make the socket non-blocking */
870  ff_socket_nonblock(udp_fd, 1);
871  }
872  if (s->is_connected) {
873  if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) {
874  ff_log_net_error(h, AV_LOG_ERROR, "connect");
875  goto fail;
876  }
877  }
878 
879  s->udp_fd = udp_fd;
880 
881 #if HAVE_PTHREAD_CANCEL
882  /*
883  Create thread in case of:
884  1. Input and circular_buffer_size is set
885  2. Output and bitrate and circular_buffer_size is set
886  */
887 
888  if (is_output && s->bitrate && !s->circular_buffer_size) {
889  /* Warn user in case of 'circular_buffer_size' is not set */
890  av_log(h, AV_LOG_WARNING,"'bitrate' option was set but 'circular_buffer_size' is not, but required\n");
891  }
892 
893  if ((!is_output && s->circular_buffer_size) || (is_output && s->bitrate && s->circular_buffer_size)) {
894  int ret;
895 
896  /* start the task going */
898  ret = pthread_mutex_init(&s->mutex, NULL);
899  if (ret != 0) {
900  av_log(h, AV_LOG_ERROR, "pthread_mutex_init failed : %s\n", strerror(ret));
901  goto fail;
902  }
903  ret = pthread_cond_init(&s->cond, NULL);
904  if (ret != 0) {
905  av_log(h, AV_LOG_ERROR, "pthread_cond_init failed : %s\n", strerror(ret));
906  goto cond_fail;
907  }
908  ret = pthread_create(&s->circular_buffer_thread, NULL, is_output?circular_buffer_task_tx:circular_buffer_task_rx, h);
909  if (ret != 0) {
910  av_log(h, AV_LOG_ERROR, "pthread_create failed : %s\n", strerror(ret));
911  goto thread_fail;
912  }
913  s->thread_started = 1;
914  }
915 #endif
916 
917  return 0;
918 #if HAVE_PTHREAD_CANCEL
919  thread_fail:
920  pthread_cond_destroy(&s->cond);
921  cond_fail:
922  pthread_mutex_destroy(&s->mutex);
923 #endif
924  fail:
925  if (udp_fd >= 0)
926  closesocket(udp_fd);
927  av_fifo_freep(&s->fifo);
929  return AVERROR(EIO);
930 }
931 
932 static int udplite_open(URLContext *h, const char *uri, int flags)
933 {
934  UDPContext *s = h->priv_data;
935 
936  // set default checksum coverage
938 
939  return udp_open(h, uri, flags);
940 }
941 
942 static int udp_read(URLContext *h, uint8_t *buf, int size)
943 {
944  UDPContext *s = h->priv_data;
945  int ret;
946  struct sockaddr_storage addr;
947  socklen_t addr_len = sizeof(addr);
948 #if HAVE_PTHREAD_CANCEL
949  int avail, nonblock = h->flags & AVIO_FLAG_NONBLOCK;
950 
951  if (s->fifo) {
952  pthread_mutex_lock(&s->mutex);
953  do {
954  avail = av_fifo_size(s->fifo);
955  if (avail) { // >=size) {
956  uint8_t tmp[4];
957 
958  av_fifo_generic_read(s->fifo, tmp, 4, NULL);
959  avail= AV_RL32(tmp);
960  if(avail > size){
961  av_log(h, AV_LOG_WARNING, "Part of datagram lost due to insufficient buffer size\n");
962  avail= size;
963  }
964 
965  av_fifo_generic_read(s->fifo, buf, avail, NULL);
966  av_fifo_drain(s->fifo, AV_RL32(tmp) - avail);
967  pthread_mutex_unlock(&s->mutex);
968  return avail;
969  } else if(s->circular_buffer_error){
970  int err = s->circular_buffer_error;
971  pthread_mutex_unlock(&s->mutex);
972  return err;
973  } else if(nonblock) {
974  pthread_mutex_unlock(&s->mutex);
975  return AVERROR(EAGAIN);
976  }
977  else {
978  /* FIXME: using the monotonic clock would be better,
979  but it does not exist on all supported platforms. */
980  int64_t t = av_gettime() + 100000;
981  struct timespec tv = { .tv_sec = t / 1000000,
982  .tv_nsec = (t % 1000000) * 1000 };
983  int err = pthread_cond_timedwait(&s->cond, &s->mutex, &tv);
984  if (err) {
985  pthread_mutex_unlock(&s->mutex);
986  return AVERROR(err == ETIMEDOUT ? EAGAIN : err);
987  }
988  nonblock = 1;
989  }
990  } while( 1);
991  }
992 #endif
993 
994  if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
995  ret = ff_network_wait_fd(s->udp_fd, 0);
996  if (ret < 0)
997  return ret;
998  }
999  ret = recvfrom(s->udp_fd, buf, size, 0, (struct sockaddr *)&addr, &addr_len);
1000  if (ret < 0)
1001  return ff_neterrno();
1002  if (ff_ip_check_source_lists(&addr, &s->filters))
1003  return AVERROR(EINTR);
1004  return ret;
1005 }
1006 
1007 static int udp_write(URLContext *h, const uint8_t *buf, int size)
1008 {
1009  UDPContext *s = h->priv_data;
1010  int ret;
1011 
1012 #if HAVE_PTHREAD_CANCEL
1013  if (s->fifo) {
1014  uint8_t tmp[4];
1015 
1016  pthread_mutex_lock(&s->mutex);
1017 
1018  /*
1019  Return error if last tx failed.
1020  Here we can't know on which packet error was, but it needs to know that error exists.
1021  */
1022  if (s->circular_buffer_error<0) {
1023  int err=s->circular_buffer_error;
1024  pthread_mutex_unlock(&s->mutex);
1025  return err;
1026  }
1027 
1028  if(av_fifo_space(s->fifo) < size + 4) {
1029  /* What about a partial packet tx ? */
1030  pthread_mutex_unlock(&s->mutex);
1031  return AVERROR(ENOMEM);
1032  }
1033  AV_WL32(tmp, size);
1034  av_fifo_generic_write(s->fifo, tmp, 4, NULL); /* size of packet */
1035  av_fifo_generic_write(s->fifo, (uint8_t *)buf, size, NULL); /* the data */
1036  pthread_cond_signal(&s->cond);
1037  pthread_mutex_unlock(&s->mutex);
1038  return size;
1039  }
1040 #endif
1041  if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
1042  ret = ff_network_wait_fd(s->udp_fd, 1);
1043  if (ret < 0)
1044  return ret;
1045  }
1046 
1047  if (!s->is_connected) {
1048  ret = sendto (s->udp_fd, buf, size, 0,
1049  (struct sockaddr *) &s->dest_addr,
1050  s->dest_addr_len);
1051  } else
1052  ret = send(s->udp_fd, buf, size, 0);
1053 
1054  return ret < 0 ? ff_neterrno() : ret;
1055 }
1056 
1057 static int udp_close(URLContext *h)
1058 {
1059  UDPContext *s = h->priv_data;
1060 
1061 #if HAVE_PTHREAD_CANCEL
1062  // Request close once writing is finished
1063  if (s->thread_started && !(h->flags & AVIO_FLAG_READ)) {
1064  pthread_mutex_lock(&s->mutex);
1065  s->close_req = 1;
1066  pthread_cond_signal(&s->cond);
1067  pthread_mutex_unlock(&s->mutex);
1068  }
1069 #endif
1070 
1071  if (s->is_multicast && (h->flags & AVIO_FLAG_READ))
1072  udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage);
1073 #if HAVE_PTHREAD_CANCEL
1074  if (s->thread_started) {
1075  int ret;
1076  // Cancel only read, as write has been signaled as success to the user
1077  if (h->flags & AVIO_FLAG_READ) {
1078 #ifdef _WIN32
1079  /* recvfrom() is not a cancellation point for win32, so we shutdown
1080  * the socket and abort pending IO, subsequent recvfrom() calls
1081  * will fail with WSAESHUTDOWN causing the thread to exit. */
1082  shutdown(s->udp_fd, SD_RECEIVE);
1083  CancelIoEx((HANDLE)(SOCKET)s->udp_fd, NULL);
1084 #else
1085  pthread_cancel(s->circular_buffer_thread);
1086 #endif
1087  }
1088  ret = pthread_join(s->circular_buffer_thread, NULL);
1089  if (ret != 0)
1090  av_log(h, AV_LOG_ERROR, "pthread_join(): %s\n", strerror(ret));
1091  pthread_mutex_destroy(&s->mutex);
1092  pthread_cond_destroy(&s->cond);
1093  }
1094 #endif
1095  closesocket(s->udp_fd);
1096  av_fifo_freep(&s->fifo);
1098  return 0;
1099 }
1100 
1102  .name = "udp",
1103  .url_open = udp_open,
1104  .url_read = udp_read,
1105  .url_write = udp_write,
1106  .url_close = udp_close,
1107  .url_get_file_handle = udp_get_file_handle,
1108  .priv_data_size = sizeof(UDPContext),
1109  .priv_data_class = &udp_class,
1111 };
1112 
1114  .name = "udplite",
1115  .url_open = udplite_open,
1116  .url_read = udp_read,
1117  .url_write = udp_write,
1118  .url_close = udp_close,
1119  .url_get_file_handle = udp_get_file_handle,
1120  .priv_data_size = sizeof(UDPContext),
1121  .priv_data_class = &udplite_context_class,
1123 };
static int udp_open(URLContext *h, const char *uri, int flags)
Definition: udp.c:626
void av_url_split(char *proto, int proto_size, char *authorization, int authorization_size, char *hostname, int hostname_size, int *port_ptr, char *path, int path_size, const char *url)
Split a URL string into components.
Definition: utils.c:4802
#define NULL
Definition: coverity.c:32
static const AVClass udplite_context_class
Definition: udp.c:154
static av_always_inline int pthread_mutex_destroy(pthread_mutex_t *mutex)
Definition: os2threads.h:112
static AVMutex mutex
Definition: log.c:44
int size
#define URL_PROTOCOL_FLAG_NETWORK
Definition: url.h:34
#define pthread_mutex_lock(a)
Definition: ffprobe.c:62
#define NI_NUMERICSERV
Definition: network.h:203
static av_always_inline int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
Definition: os2threads.h:192
AVOption.
Definition: opt.h:246
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
const URLProtocol ff_udplite_protocol
Definition: udp.c:1113
char * block
Definition: udp.c:118
int is_streamed
true if streamed (no seek possible), default = false
Definition: url.h:45
#define AVIO_FLAG_READ
read-only
Definition: avio.h:674
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
int64_t rw_timeout
maximum time to wait for (network) read/write operation completion, in mcs
Definition: url.h:48
static int udp_set_url(URLContext *h, struct sockaddr_storage *addr, const char *hostname, int port)
Definition: udp.c:318
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:675
int ff_ip_parse_blocks(void *log_ctx, const char *buf, IPSourceFilters *filters)
Parses the address[,address] source block list in buf and adds it to the filters in the IPSourceFilte...
Definition: ip.c:148
#define AI_PASSIVE
Definition: network.h:179
#define UDPLITE_SEND_CSCOV
Definition: udp.c:56
struct sockaddr_storage * exclude_addrs
Definition: ip.h:33
#define IPPROTO_UDPLITE
Definition: udp.c:61
int flags
Definition: url.h:43
int udplite_coverage
Definition: udp.c:87
#define freeaddrinfo
Definition: network.h:218
int av_usleep(unsigned usec)
Sleep for a period of time.
Definition: time.c:84
#define PTHREAD_CANCEL_ENABLE
Definition: w32pthreads.h:66
static void error(const char *err)
static av_always_inline int pthread_cond_destroy(pthread_cond_t *cond)
Definition: os2threads.h:144
int av_fifo_generic_write(AVFifoBuffer *f, void *src, int size, int(*func)(void *, void *, int))
Feed data from a user-supplied callback to an AVFifoBuffer.
Definition: fifo.c:122
int ff_socket(int af, int type, int proto)
Definition: network.c:183
int64_t bitrate
Definition: udp.c:103
int ff_ip_parse_sources(void *log_ctx, const char *buf, IPSourceFilters *filters)
Parses the address[,address] source list in buf and adds it to the filters in the IPSourceFilters str...
Definition: ip.c:143
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define UDPLITE_RECV_CSCOV
Definition: udp.c:57
uint8_t
AVOptions.
miscellaneous OS support macros and functions.
int ff_udp_get_local_port(URLContext *h)
Return the local port used by the UDP connection.
Definition: udp.c:445
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:92
int av_fifo_space(const AVFifoBuffer *f)
Return the amount of space in bytes in the AVFifoBuffer, that is the amount of data you can write int...
Definition: fifo.c:82
int is_broadcast
Definition: udp.c:91
static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr, struct sockaddr *local_addr)
Definition: udp.c:216
#define UDP_HEADER_SIZE
Definition: udp.c:81
static int udp_port(struct sockaddr_storage *addr, int addr_len)
Definition: udp.c:376
int nb_include_addrs
Definition: ip.h:30
struct sockaddr_storage * include_addrs
Definition: ip.h:32
int av_find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
Attempt to find a specific tag in a URL.
Definition: parseutils.c:751
static av_always_inline int pthread_cond_signal(pthread_cond_t *cond)
Definition: os2threads.h:152
static int udp_close(URLContext *h)
Definition: udp.c:1057
#define av_log(a,...)
#define UDP_RX_BUF_SIZE
Definition: udp.c:79
IPSourceFilters filters
Definition: udp.c:119
int circular_buffer_size
Definition: udp.c:100
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int ff_udp_set_remote_url(URLContext *h, const char *uri)
If no filename is given to av_open_input_file because you want to get the local port first...
Definition: udp.c:406
#define AVERROR(e)
Definition: error.h:43
#define E
Definition: udp.c:124
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
int av_fifo_generic_read(AVFifoBuffer *f, void *dest, int buf_size, void(*func)(void *, void *, int))
Feed data from an AVFifoBuffer to a user-supplied callback.
Definition: fifo.c:213
int reuse_socket
Definition: udp.c:93
static int pthread_setcancelstate(int state, int *oldstate)
Definition: w32pthreads.h:186
#define UDP_TX_BUF_SIZE
Definition: udp.c:78
simple assert() macros that are a bit more flexible than ISO C assert().
#define D
Definition: udp.c:123
int dest_addr_len
Definition: udp.c:96
void ff_ip_reset_filters(IPSourceFilters *filters)
Resets the IP filter list and frees the internal fields of an IPSourceFilters structure.
Definition: ip.c:153
int ff_is_multicast_address(struct sockaddr *addr)
Definition: network.c:145
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:123
int timeout
Definition: udp.c:115
#define OFFSET(x)
Definition: udp.c:122
char * localaddr
Definition: udp.c:114
int ai_addrlen
Definition: network.h:142
#define HAVE_PTHREAD_CANCEL
Definition: config.h:312
static const AVOption options[]
Definition: udp.c:125
uint8_t tmp[UDP_MAX_PKT_SIZE+4]
Definition: udp.c:112
#define ff_neterrno()
Definition: network.h:68
int overrun_nonfatal
Definition: udp.c:94
static av_always_inline int pthread_join(pthread_t thread, void **value_ptr)
Definition: os2threads.h:94
static av_always_inline int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)
Definition: os2threads.h:104
static av_always_inline int pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex, const struct timespec *abstime)
Definition: os2threads.h:170
#define s(width, name)
Definition: cbs_vp9.c:257
static int udp_get_file_handle(URLContext *h)
Return the udp file handle for select() usage to wait for several RTP streams at the same time...
Definition: udp.c:456
int is_connected
Definition: udp.c:97
#define AV_RL32
Definition: intreadwrite.h:146
#define pthread_mutex_unlock(a)
Definition: ffprobe.c:66
struct sockaddr_storage local_addr_storage
Definition: udp.c:116
Definition: udp.c:83
int ff_socket_nonblock(int socket, int enable)
int64_t burst_bits
Definition: udp.c:104
int ttl
Definition: udp.c:86
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
static av_always_inline int pthread_create(pthread_t *thread, const pthread_attr_t *attr, void *(*start_routine)(void *), void *arg)
Definition: os2threads.h:80
#define IPV6_ADD_MEMBERSHIP
Definition: udp.c:74
int av_fifo_size(const AVFifoBuffer *f)
Return the amount of data in bytes in the AVFifoBuffer, that is the amount of data you can read from ...
Definition: fifo.c:77
#define AVIO_FLAG_NONBLOCK
Use non-blocking mode.
Definition: avio.h:693
int local_port
Definition: udp.c:92
int pkt_size
Definition: udp.c:89
#define IPV6_DROP_MEMBERSHIP
Definition: udp.c:75
a very simple circular buffer FIFO implementation
Definition: url.h:38
int ff_ip_check_source_lists(struct sockaddr_storage *source_addr_ptr, IPSourceFilters *s)
Checks the source address against a given IP source filter.
Definition: ip.c:44
Describe the class of an AVClass context structure.
Definition: log.h:67
char * sources
Definition: udp.c:117
static int 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)
Definition: udp.c:249
void * priv_data
Definition: url.h:41
#define gai_strerror
Definition: network.h:225
#define PTHREAD_CANCEL_DISABLE
Definition: w32pthreads.h:67
AVFifoBuffer * fifo
Definition: udp.c:101
misc parsing utilities
const char * name
Definition: url.h:55
int64_t av_gettime_relative(void)
Get the current time in microseconds since some unspecified starting point.
Definition: time.c:56
#define flags(name, subs,...)
Definition: cbs_av1.c:565
uint8_t level
Definition: svq3.c:210
int(* cond)(enum AVPixelFormat pix_fmt)
Definition: pixdesc_query.c:28
Main libavformat public API header.
int
struct sockaddr_storage dest_addr
Definition: udp.c:95
_fmutex pthread_mutex_t
Definition: os2threads.h:53
static int udp_read(URLContext *h, uint8_t *buf, int size)
Definition: udp.c:942
int remaining_in_dg
Definition: udp.c:113
struct addrinfo * ai_next
Definition: network.h:145
static av_always_inline int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
Definition: os2threads.h:133
static int udp_set_multicast_ttl(int sockfd, int mcastTTL, struct sockaddr *addr)
Definition: udp.c:161
int udp_fd
Definition: udp.c:85
int nb_exclude_addrs
Definition: ip.h:31
#define getnameinfo
Definition: network.h:219
AVFifoBuffer * av_fifo_alloc(unsigned int size)
Initialize an AVFifoBuffer.
Definition: fifo.c:43
static int udplite_open(URLContext *h, const char *uri, int flags)
Definition: udp.c:932
int len
static int udp_join_multicast_group(int sockfd, struct sockaddr *addr, struct sockaddr *local_addr)
Definition: udp.c:183
int circular_buffer_error
Definition: udp.c:102
int close_req
Definition: udp.c:105
int buffer_size
Definition: udp.c:88
static int udp_socket_create(URLContext *h, struct sockaddr_storage *addr, socklen_t *addr_len, const char *localaddr)
Definition: udp.c:334
int is_multicast
Definition: udp.c:90
struct addrinfo * ff_ip_resolve_host(void *log_ctx, const char *hostname, int port, int type, int family, int flags)
Resolves hostname into an addrinfo structure.
Definition: ip.c:63
int max_packet_size
if non zero, the stream is packetized with this max packet size
Definition: url.h:44
static const AVClass udp_class
Definition: udp.c:147
#define UDP_MAX_PKT_SIZE
Definition: udp.c:80
int ff_network_wait_fd(int fd, int write)
Definition: network.c:69
unbuffered private I/O API
void av_fifo_freep(AVFifoBuffer **f)
Free an AVFifoBuffer and reset pointer to NULL.
Definition: fifo.c:63
void av_fifo_drain(AVFifoBuffer *f, int size)
Discard data from the FIFO.
Definition: fifo.c:233
struct sockaddr * ai_addr
Definition: network.h:143
Structure for storing IP (UDP) source filters or block lists.
Definition: ip.h:29
void ff_log_net_error(void *ctx, int level, const char *prefix)
Definition: network.c:581
static int udp_write(URLContext *h, const uint8_t *buf, int size)
Definition: udp.c:1007
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
const URLProtocol ff_udp_protocol
Definition: udp.c:1101
int ai_family
Definition: network.h:139