FFmpeg  4.4
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, 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 
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 ff_neterrno();
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 ff_neterrno();
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 ff_neterrno();
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 ff_neterrno();
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
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)) {
491  s->circular_buffer_error = ff_neterrno();
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  int ret;
637 
638  h->is_streamed = 1;
639 
640  is_output = !(flags & AVIO_FLAG_READ);
641  if (s->buffer_size < 0)
642  s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_RX_BUF_SIZE;
643 
644  if (s->sources) {
645  if ((ret = ff_ip_parse_sources(h, s->sources, &s->filters)) < 0)
646  goto fail;
647  }
648 
649  if (s->block) {
650  if ((ret = ff_ip_parse_blocks(h, s->block, &s->filters)) < 0)
651  goto fail;
652  }
653 
654  p = strchr(uri, '?');
655  if (p) {
656  if (av_find_info_tag(buf, sizeof(buf), "reuse", p)) {
657  char *endptr = NULL;
658  s->reuse_socket = strtol(buf, &endptr, 10);
659  /* assume if no digits were found it is a request to enable it */
660  if (buf == endptr)
661  s->reuse_socket = 1;
662  }
663  if (av_find_info_tag(buf, sizeof(buf), "overrun_nonfatal", p)) {
664  char *endptr = NULL;
665  s->overrun_nonfatal = strtol(buf, &endptr, 10);
666  /* assume if no digits were found it is a request to enable it */
667  if (buf == endptr)
668  s->overrun_nonfatal = 1;
669  if (!HAVE_PTHREAD_CANCEL)
671  "'overrun_nonfatal' option was set but it is not supported "
672  "on this build (pthread support is required)\n");
673  }
674  if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) {
675  s->ttl = strtol(buf, NULL, 10);
676  }
677  if (av_find_info_tag(buf, sizeof(buf), "udplite_coverage", p)) {
678  s->udplite_coverage = strtol(buf, NULL, 10);
679  }
680  if (av_find_info_tag(buf, sizeof(buf), "localport", p)) {
681  s->local_port = strtol(buf, NULL, 10);
682  }
683  if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
684  s->pkt_size = strtol(buf, NULL, 10);
685  }
686  if (av_find_info_tag(buf, sizeof(buf), "buffer_size", p)) {
687  s->buffer_size = strtol(buf, NULL, 10);
688  }
689  if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
690  s->is_connected = strtol(buf, NULL, 10);
691  }
692  if (av_find_info_tag(buf, sizeof(buf), "dscp", p)) {
693  dscp = strtol(buf, NULL, 10);
694  }
695  if (av_find_info_tag(buf, sizeof(buf), "fifo_size", p)) {
696  s->circular_buffer_size = strtol(buf, NULL, 10);
697  if (!HAVE_PTHREAD_CANCEL)
699  "'circular_buffer_size' option was set but it is not supported "
700  "on this build (pthread support is required)\n");
701  }
702  if (av_find_info_tag(buf, sizeof(buf), "bitrate", p)) {
703  s->bitrate = strtoll(buf, NULL, 10);
704  if (!HAVE_PTHREAD_CANCEL)
706  "'bitrate' option was set but it is not supported "
707  "on this build (pthread support is required)\n");
708  }
709  if (av_find_info_tag(buf, sizeof(buf), "burst_bits", p)) {
710  s->burst_bits = strtoll(buf, NULL, 10);
711  }
712  if (av_find_info_tag(buf, sizeof(buf), "localaddr", p)) {
713  av_strlcpy(localaddr, buf, sizeof(localaddr));
714  }
715  if (av_find_info_tag(buf, sizeof(buf), "sources", p)) {
716  if ((ret = ff_ip_parse_sources(h, buf, &s->filters)) < 0)
717  goto fail;
718  }
719  if (av_find_info_tag(buf, sizeof(buf), "block", p)) {
720  if ((ret = ff_ip_parse_blocks(h, buf, &s->filters)) < 0)
721  goto fail;
722  }
723  if (!is_output && av_find_info_tag(buf, sizeof(buf), "timeout", p))
724  s->timeout = strtol(buf, NULL, 10);
725  if (is_output && av_find_info_tag(buf, sizeof(buf), "broadcast", p))
726  s->is_broadcast = strtol(buf, NULL, 10);
727  }
728  /* handling needed to support options picking from both AVOption and URL */
729  s->circular_buffer_size *= 188;
730  if (flags & AVIO_FLAG_WRITE) {
731  h->max_packet_size = s->pkt_size;
732  } else {
733  h->max_packet_size = UDP_MAX_PKT_SIZE;
734  }
735  h->rw_timeout = s->timeout;
736 
737  /* fill the dest addr */
738  av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
739 
740  /* XXX: fix av_url_split */
741  if (hostname[0] == '\0' || hostname[0] == '?') {
742  /* only accepts null hostname if input */
743  if (!(flags & AVIO_FLAG_READ))
744  goto fail;
745  } else {
746  if ((ret = ff_udp_set_remote_url(h, uri)) < 0)
747  goto fail;
748  }
749 
750  if ((s->is_multicast || s->local_port <= 0) && (h->flags & AVIO_FLAG_READ))
751  s->local_port = port;
752 
753  if (localaddr[0])
754  udp_fd = udp_socket_create(h, &my_addr, &len, localaddr);
755  else
756  udp_fd = udp_socket_create(h, &my_addr, &len, s->localaddr);
757  if (udp_fd < 0)
758  goto fail;
759 
760  s->local_addr_storage=my_addr; //store for future multicast join
761 
762  /* Follow the requested reuse option, unless it's multicast in which
763  * case enable reuse unless explicitly disabled.
764  */
765  if (s->reuse_socket > 0 || (s->is_multicast && s->reuse_socket < 0)) {
766  s->reuse_socket = 1;
767  if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0) {
768  ret = ff_neterrno();
769  goto fail;
770  }
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  ret = ff_neterrno();
777  goto fail;
778  }
779 #else
780  ret = AVERROR(ENOSYS);
781  goto fail;
782 #endif
783  }
784 
785  /* Set the checksum coverage for UDP-Lite (RFC 3828) for sending and receiving.
786  * The receiver coverage has to be less than or equal to the sender coverage.
787  * Otherwise, the receiver will drop all packets.
788  */
789  if (s->udplite_coverage) {
790  if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
791  av_log(h, AV_LOG_WARNING, "socket option UDPLITE_SEND_CSCOV not available");
792 
793  if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
794  av_log(h, AV_LOG_WARNING, "socket option UDPLITE_RECV_CSCOV not available");
795  }
796 
797  if (dscp >= 0) {
798  dscp <<= 2;
799  if (setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp)) != 0) {
800  ret = ff_neterrno();
801  goto fail;
802  }
803  }
804 
805  /* If multicast, try binding the multicast address first, to avoid
806  * receiving UDP packets from other sources aimed at the same UDP
807  * port. This fails on windows. This makes sending to the same address
808  * using sendto() fail, so only do it if we're opened in read-only mode. */
809  if (s->is_multicast && (h->flags & AVIO_FLAG_READ)) {
810  bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
811  }
812  /* bind to the local address if not multicast or if the multicast
813  * bind failed */
814  /* the bind is needed to give a port to the socket now */
815  if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) {
816  ff_log_net_error(h, AV_LOG_ERROR, "bind failed");
817  ret = ff_neterrno();
818  goto fail;
819  }
820 
821  len = sizeof(my_addr);
822  getsockname(udp_fd, (struct sockaddr *)&my_addr, &len);
823  s->local_port = udp_port(&my_addr, len);
824 
825  if (s->is_multicast) {
826  if (h->flags & AVIO_FLAG_WRITE) {
827  /* output */
828  if ((ret = udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr)) < 0)
829  goto fail;
830  }
831  if (h->flags & AVIO_FLAG_READ) {
832  /* input */
833  if (s->filters.nb_include_addrs) {
834  if ((ret = udp_set_multicast_sources(h, udp_fd,
835  (struct sockaddr *)&s->dest_addr,
836  s->dest_addr_len, &s->local_addr_storage,
837  s->filters.include_addrs,
838  s->filters.nb_include_addrs, 1)) < 0)
839  goto fail;
840  } else {
841  if ((ret = udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage)) < 0)
842  goto fail;
843  }
844  if (s->filters.nb_exclude_addrs) {
845  if ((ret = udp_set_multicast_sources(h, udp_fd,
846  (struct sockaddr *)&s->dest_addr,
847  s->dest_addr_len, &s->local_addr_storage,
848  s->filters.exclude_addrs,
849  s->filters.nb_exclude_addrs, 0)) < 0)
850  goto fail;
851  }
852  }
853  }
854 
855  if (is_output) {
856  /* limit the tx buf size to limit latency */
857  tmp = s->buffer_size;
858  if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
859  ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)");
860  ret = ff_neterrno();
861  goto fail;
862  }
863  } else {
864  /* set udp recv buffer size to the requested value (default UDP_RX_BUF_SIZE) */
865  tmp = s->buffer_size;
866  if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) {
867  ff_log_net_error(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF)");
868  }
869  len = sizeof(tmp);
870  if (getsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, &len) < 0) {
871  ff_log_net_error(h, AV_LOG_WARNING, "getsockopt(SO_RCVBUF)");
872  } else {
873  av_log(h, AV_LOG_DEBUG, "end receive buffer size reported is %d\n", tmp);
874  if(tmp < s->buffer_size)
875  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);
876  }
877 
878  /* make the socket non-blocking */
879  ff_socket_nonblock(udp_fd, 1);
880  }
881  if (s->is_connected) {
882  if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) {
883  ff_log_net_error(h, AV_LOG_ERROR, "connect");
884  ret = ff_neterrno();
885  goto fail;
886  }
887  }
888 
889  s->udp_fd = udp_fd;
890 
891 #if HAVE_PTHREAD_CANCEL
892  /*
893  Create thread in case of:
894  1. Input and circular_buffer_size is set
895  2. Output and bitrate and circular_buffer_size is set
896  */
897 
898  if (is_output && s->bitrate && !s->circular_buffer_size) {
899  /* Warn user in case of 'circular_buffer_size' is not set */
900  av_log(h, AV_LOG_WARNING,"'bitrate' option was set but 'circular_buffer_size' is not, but required\n");
901  }
902 
903  if ((!is_output && s->circular_buffer_size) || (is_output && s->bitrate && s->circular_buffer_size)) {
904  /* start the task going */
905  s->fifo = av_fifo_alloc(s->circular_buffer_size);
906  if (!s->fifo) {
907  ret = AVERROR(ENOMEM);
908  goto fail;
909  }
910  ret = pthread_mutex_init(&s->mutex, NULL);
911  if (ret != 0) {
912  av_log(h, AV_LOG_ERROR, "pthread_mutex_init failed : %s\n", strerror(ret));
913  ret = AVERROR(ret);
914  goto fail;
915  }
916  ret = pthread_cond_init(&s->cond, NULL);
917  if (ret != 0) {
918  av_log(h, AV_LOG_ERROR, "pthread_cond_init failed : %s\n", strerror(ret));
919  ret = AVERROR(ret);
920  goto cond_fail;
921  }
922  ret = pthread_create(&s->circular_buffer_thread, NULL, is_output?circular_buffer_task_tx:circular_buffer_task_rx, h);
923  if (ret != 0) {
924  av_log(h, AV_LOG_ERROR, "pthread_create failed : %s\n", strerror(ret));
925  ret = AVERROR(ret);
926  goto thread_fail;
927  }
928  s->thread_started = 1;
929  }
930 #endif
931 
932  return 0;
933 #if HAVE_PTHREAD_CANCEL
934  thread_fail:
935  pthread_cond_destroy(&s->cond);
936  cond_fail:
937  pthread_mutex_destroy(&s->mutex);
938 #endif
939  fail:
940  if (udp_fd >= 0)
941  closesocket(udp_fd);
942  av_fifo_freep(&s->fifo);
943  ff_ip_reset_filters(&s->filters);
944  return ret;
945 }
946 
947 static int udplite_open(URLContext *h, const char *uri, int flags)
948 {
949  UDPContext *s = h->priv_data;
950 
951  // set default checksum coverage
952  s->udplite_coverage = UDP_HEADER_SIZE;
953 
954  return udp_open(h, uri, flags);
955 }
956 
957 static int udp_read(URLContext *h, uint8_t *buf, int size)
958 {
959  UDPContext *s = h->priv_data;
960  int ret;
961  struct sockaddr_storage addr;
962  socklen_t addr_len = sizeof(addr);
963 #if HAVE_PTHREAD_CANCEL
964  int avail, nonblock = h->flags & AVIO_FLAG_NONBLOCK;
965 
966  if (s->fifo) {
967  pthread_mutex_lock(&s->mutex);
968  do {
969  avail = av_fifo_size(s->fifo);
970  if (avail) { // >=size) {
971  uint8_t tmp[4];
972 
973  av_fifo_generic_read(s->fifo, tmp, 4, NULL);
974  avail = AV_RL32(tmp);
975  if(avail > size){
976  av_log(h, AV_LOG_WARNING, "Part of datagram lost due to insufficient buffer size\n");
977  avail = size;
978  }
979 
980  av_fifo_generic_read(s->fifo, buf, avail, NULL);
981  av_fifo_drain(s->fifo, AV_RL32(tmp) - avail);
982  pthread_mutex_unlock(&s->mutex);
983  return avail;
984  } else if(s->circular_buffer_error){
985  int err = s->circular_buffer_error;
986  pthread_mutex_unlock(&s->mutex);
987  return err;
988  } else if(nonblock) {
989  pthread_mutex_unlock(&s->mutex);
990  return AVERROR(EAGAIN);
991  } else {
992  /* FIXME: using the monotonic clock would be better,
993  but it does not exist on all supported platforms. */
994  int64_t t = av_gettime() + 100000;
995  struct timespec tv = { .tv_sec = t / 1000000,
996  .tv_nsec = (t % 1000000) * 1000 };
997  int err = pthread_cond_timedwait(&s->cond, &s->mutex, &tv);
998  if (err) {
999  pthread_mutex_unlock(&s->mutex);
1000  return AVERROR(err == ETIMEDOUT ? EAGAIN : err);
1001  }
1002  nonblock = 1;
1003  }
1004  } while(1);
1005  }
1006 #endif
1007 
1008  if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
1009  ret = ff_network_wait_fd(s->udp_fd, 0);
1010  if (ret < 0)
1011  return ret;
1012  }
1013  ret = recvfrom(s->udp_fd, buf, size, 0, (struct sockaddr *)&addr, &addr_len);
1014  if (ret < 0)
1015  return ff_neterrno();
1016  if (ff_ip_check_source_lists(&addr, &s->filters))
1017  return AVERROR(EINTR);
1018  return ret;
1019 }
1020 
1021 static int udp_write(URLContext *h, const uint8_t *buf, int size)
1022 {
1023  UDPContext *s = h->priv_data;
1024  int ret;
1025 
1026 #if HAVE_PTHREAD_CANCEL
1027  if (s->fifo) {
1028  uint8_t tmp[4];
1029 
1030  pthread_mutex_lock(&s->mutex);
1031 
1032  /*
1033  Return error if last tx failed.
1034  Here we can't know on which packet error was, but it needs to know that error exists.
1035  */
1036  if (s->circular_buffer_error<0) {
1037  int err = s->circular_buffer_error;
1038  pthread_mutex_unlock(&s->mutex);
1039  return err;
1040  }
1041 
1042  if(av_fifo_space(s->fifo) < size + 4) {
1043  /* What about a partial packet tx ? */
1044  pthread_mutex_unlock(&s->mutex);
1045  return AVERROR(ENOMEM);
1046  }
1047  AV_WL32(tmp, size);
1048  av_fifo_generic_write(s->fifo, tmp, 4, NULL); /* size of packet */
1049  av_fifo_generic_write(s->fifo, (uint8_t *)buf, size, NULL); /* the data */
1050  pthread_cond_signal(&s->cond);
1051  pthread_mutex_unlock(&s->mutex);
1052  return size;
1053  }
1054 #endif
1055  if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
1056  ret = ff_network_wait_fd(s->udp_fd, 1);
1057  if (ret < 0)
1058  return ret;
1059  }
1060 
1061  if (!s->is_connected) {
1062  ret = sendto (s->udp_fd, buf, size, 0,
1063  (struct sockaddr *) &s->dest_addr,
1064  s->dest_addr_len);
1065  } else
1066  ret = send(s->udp_fd, buf, size, 0);
1067 
1068  return ret < 0 ? ff_neterrno() : ret;
1069 }
1070 
1071 static int udp_close(URLContext *h)
1072 {
1073  UDPContext *s = h->priv_data;
1074 
1075 #if HAVE_PTHREAD_CANCEL
1076  // Request close once writing is finished
1077  if (s->thread_started && !(h->flags & AVIO_FLAG_READ)) {
1078  pthread_mutex_lock(&s->mutex);
1079  s->close_req = 1;
1080  pthread_cond_signal(&s->cond);
1081  pthread_mutex_unlock(&s->mutex);
1082  }
1083 #endif
1084 
1085  if (s->is_multicast && (h->flags & AVIO_FLAG_READ))
1086  udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage);
1087 #if HAVE_PTHREAD_CANCEL
1088  if (s->thread_started) {
1089  int ret;
1090  // Cancel only read, as write has been signaled as success to the user
1091  if (h->flags & AVIO_FLAG_READ) {
1092 #ifdef _WIN32
1093  /* recvfrom() is not a cancellation point for win32, so we shutdown
1094  * the socket and abort pending IO, subsequent recvfrom() calls
1095  * will fail with WSAESHUTDOWN causing the thread to exit. */
1096  shutdown(s->udp_fd, SD_RECEIVE);
1097  CancelIoEx((HANDLE)(SOCKET)s->udp_fd, NULL);
1098 #else
1099  pthread_cancel(s->circular_buffer_thread);
1100 #endif
1101  }
1102  ret = pthread_join(s->circular_buffer_thread, NULL);
1103  if (ret != 0)
1104  av_log(h, AV_LOG_ERROR, "pthread_join(): %s\n", strerror(ret));
1105  pthread_mutex_destroy(&s->mutex);
1106  pthread_cond_destroy(&s->cond);
1107  }
1108 #endif
1109  closesocket(s->udp_fd);
1110  av_fifo_freep(&s->fifo);
1111  ff_ip_reset_filters(&s->filters);
1112  return 0;
1113 }
1114 
1116  .name = "udp",
1117  .url_open = udp_open,
1118  .url_read = udp_read,
1119  .url_write = udp_write,
1120  .url_close = udp_close,
1121  .url_get_file_handle = udp_get_file_handle,
1122  .priv_data_size = sizeof(UDPContext),
1123  .priv_data_class = &udp_class,
1125 };
1126 
1128  .name = "udplite",
1129  .url_open = udplite_open,
1130  .url_read = udp_read,
1131  .url_write = udp_write,
1132  .url_close = udp_close,
1133  .url_get_file_handle = udp_get_file_handle,
1134  .priv_data_size = sizeof(UDPContext),
1135  .priv_data_class = &udplite_context_class,
1137 };
uint8_t
simple assert() macros that are a bit more flexible than ISO C assert().
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
Main libavformat public API header.
#define AVIO_FLAG_READ
read-only
Definition: avio.h:674
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:675
#define AVIO_FLAG_NONBLOCK
Use non-blocking mode.
Definition: avio.h:693
#define AV_RL32
Definition: intreadwrite.h:146
#define flags(name, subs,...)
Definition: cbs_av1.c:561
#define s(width, name)
Definition: cbs_vp9.c:257
#define fail()
Definition: checkasm.h:133
#define HAVE_PTHREAD_CANCEL
Definition: config.h:314
#define NULL
Definition: coverity.c:32
int
#define pthread_mutex_lock(a)
Definition: ffprobe.c:63
#define pthread_mutex_unlock(a)
Definition: ffprobe.c:67
a very simple circular buffer FIFO implementation
@ AV_OPT_TYPE_INT64
Definition: opt.h:226
@ AV_OPT_TYPE_INT
Definition: opt.h:225
@ AV_OPT_TYPE_BOOL
Definition: opt.h:242
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
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:4795
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
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 LIBAVUTIL_VERSION_INT
Definition: version.h:85
int i
Definition: input.c:407
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
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
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_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
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 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
void av_fifo_drain(AVFifoBuffer *f, int size)
Discard data from the FIFO.
Definition: fifo.c:233
void av_fifo_freep(AVFifoBuffer **f)
Free an AVFifoBuffer and reset pointer to NULL.
Definition: fifo.c:63
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
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 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
AVFifoBuffer * av_fifo_alloc(unsigned int size)
Initialize an AVFifoBuffer.
Definition: fifo.c:43
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
common internal API header
static AVMutex mutex
Definition: log.c:44
int ff_is_multicast_address(struct sockaddr *addr)
Definition: network.c:145
int ff_socket(int af, int type, int proto)
Definition: network.c:183
void ff_log_net_error(void *ctx, int level, const char *prefix)
Definition: network.c:581
int ff_network_wait_fd(int fd, int write)
Definition: network.c:69
int ff_socket_nonblock(int socket, int enable)
#define gai_strerror
Definition: network.h:225
#define ff_neterrno()
Definition: network.h:68
#define getnameinfo
Definition: network.h:219
#define freeaddrinfo
Definition: network.h:218
#define AI_PASSIVE
Definition: network.h:179
#define NI_NUMERICSERV
Definition: network.h:203
AVOptions.
static av_always_inline int pthread_cond_signal(pthread_cond_t *cond)
Definition: os2threads.h:152
static av_always_inline int pthread_cond_destroy(pthread_cond_t *cond)
Definition: os2threads.h:144
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_join(pthread_t thread, void **value_ptr)
Definition: os2threads.h:94
static av_always_inline int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
Definition: os2threads.h:133
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
_fmutex pthread_mutex_t
Definition: os2threads.h:53
static av_always_inline int pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex, const struct timespec *abstime)
Definition: os2threads.h:170
static av_always_inline int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
Definition: os2threads.h:192
static av_always_inline int pthread_mutex_destroy(pthread_mutex_t *mutex)
Definition: os2threads.h:112
miscellaneous OS support macros and functions.
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
misc parsing utilities
int(* cond)(enum AVPixelFormat pix_fmt)
Definition: pixdesc_query.c:28
Describe the class of an AVClass context structure.
Definition: log.h:67
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
AVOption.
Definition: opt.h:248
Structure for storing IP (UDP) source filters or block lists.
Definition: ip.h:29
Definition: udp.c:83
struct sockaddr_storage dest_addr
Definition: udp.c:95
int dest_addr_len
Definition: udp.c:96
char * block
Definition: udp.c:118
struct sockaddr_storage local_addr_storage
Definition: udp.c:116
int circular_buffer_size
Definition: udp.c:100
IPSourceFilters filters
Definition: udp.c:119
int is_connected
Definition: udp.c:97
int circular_buffer_error
Definition: udp.c:102
int pkt_size
Definition: udp.c:89
int64_t bitrate
Definition: udp.c:103
int buffer_size
Definition: udp.c:88
int timeout
Definition: udp.c:115
int is_multicast
Definition: udp.c:90
int is_broadcast
Definition: udp.c:91
char * localaddr
Definition: udp.c:114
int udplite_coverage
Definition: udp.c:87
char * sources
Definition: udp.c:117
int udp_fd
Definition: udp.c:85
uint8_t tmp[UDP_MAX_PKT_SIZE+4]
Definition: udp.c:112
int64_t burst_bits
Definition: udp.c:104
int local_port
Definition: udp.c:92
int overrun_nonfatal
Definition: udp.c:94
int ttl
Definition: udp.c:86
int close_req
Definition: udp.c:105
int reuse_socket
Definition: udp.c:93
AVFifoBuffer * fifo
Definition: udp.c:101
int remaining_in_dg
Definition: udp.c:113
Definition: url.h:38
const char * name
Definition: url.h:55
struct sockaddr * ai_addr
Definition: network.h:143
int ai_addrlen
Definition: network.h:142
struct addrinfo * ai_next
Definition: network.h:145
int ai_family
Definition: network.h:139
uint8_t level
Definition: svq3.c:206
#define av_log(a,...)
static void error(const char *err)
static uint8_t tmp[11]
Definition: aes_ctr.c:27
static int16_t block[64]
Definition: dct.c:116
int64_t bitrate
Definition: h264_levels.c:131
int av_usleep(unsigned usec)
Sleep for a period of time.
Definition: time.c:84
int64_t av_gettime_relative(void)
Get the current time in microseconds since some unspecified starting point.
Definition: time.c:56
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
int size
#define E
Definition: udp.c:124
static int udp_join_multicast_group(int sockfd, struct sockaddr *addr, struct sockaddr *local_addr)
Definition: udp.c:183
static int udp_socket_create(URLContext *h, struct sockaddr_storage *addr, socklen_t *addr_len, const char *localaddr)
Definition: udp.c:334
#define UDPLITE_SEND_CSCOV
Definition: udp.c:56
static const AVOption options[]
Definition: udp.c:125
static int udp_set_url(URLContext *h, struct sockaddr_storage *addr, const char *hostname, int port)
Definition: udp.c:318
int ff_udp_get_local_port(URLContext *h)
Return the local port used by the UDP connection.
Definition: udp.c:445
const URLProtocol ff_udp_protocol
Definition: udp.c:1115
#define UDP_TX_BUF_SIZE
Definition: udp.c:78
#define IPV6_DROP_MEMBERSHIP
Definition: udp.c:75
static int udp_close(URLContext *h)
Definition: udp.c:1071
#define IPPROTO_UDPLITE
Definition: udp.c:61
static int udp_set_multicast_ttl(int sockfd, int mcastTTL, struct sockaddr *addr)
Definition: udp.c:161
static int udplite_open(URLContext *h, const char *uri, int flags)
Definition: udp.c:947
#define UDP_HEADER_SIZE
Definition: udp.c:81
static int udp_open(URLContext *h, const char *uri, int flags)
Definition: udp.c:626
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
static const AVClass udp_class
Definition: udp.c:147
#define UDP_RX_BUF_SIZE
Definition: udp.c:79
const URLProtocol ff_udplite_protocol
Definition: udp.c:1127
static const AVClass udplite_context_class
Definition: udp.c:154
#define OFFSET(x)
Definition: udp.c:122
#define IPV6_ADD_MEMBERSHIP
Definition: udp.c:74
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
static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr, struct sockaddr *local_addr)
Definition: udp.c:216
static int udp_port(struct sockaddr_storage *addr, int addr_len)
Definition: udp.c:376
static int udp_write(URLContext *h, const uint8_t *buf, int size)
Definition: udp.c:1021
#define D
Definition: udp.c:123
#define UDPLITE_RECV_CSCOV
Definition: udp.c:57
#define UDP_MAX_PKT_SIZE
Definition: udp.c:80
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
static int udp_read(URLContext *h, uint8_t *buf, int size)
Definition: udp.c:957
unbuffered private I/O API
#define URL_PROTOCOL_FLAG_NETWORK
Definition: url.h:34
int len
static int pthread_setcancelstate(int state, int *oldstate)
Definition: w32pthreads.h:186
#define PTHREAD_CANCEL_DISABLE
Definition: w32pthreads.h:67
#define PTHREAD_CANCEL_ENABLE
Definition: w32pthreads.h:66