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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_PTHREAD_CANCEL
65 #include <pthread.h>
66 #endif
67 
68 #ifndef IPV6_ADD_MEMBERSHIP
69 #define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
70 #define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
71 #endif
72 
73 #define UDP_TX_BUF_SIZE 32768
74 #define UDP_MAX_PKT_SIZE 65536
75 #define UDP_HEADER_SIZE 8
76 
77 typedef struct UDPContext {
78  const AVClass *class;
79  int udp_fd;
80  int ttl;
83  int pkt_size;
92 
93  /* Circular Buffer variables for use in UDP receive code */
97  int64_t bitrate; /* number of bits to send per second */
98  int64_t burst_bits;
99  int close_req;
100 #if HAVE_PTHREAD_CANCEL
101  pthread_t circular_buffer_thread;
104  int thread_started;
105 #endif
108  char *localaddr;
109  int timeout;
111  char *sources;
112  char *block;
114 } UDPContext;
115 
116 #define OFFSET(x) offsetof(UDPContext, x)
117 #define D AV_OPT_FLAG_DECODING_PARAM
118 #define E AV_OPT_FLAG_ENCODING_PARAM
119 static const AVOption options[] = {
120  { "buffer_size", "System data size (in bytes)", OFFSET(buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
121  { "bitrate", "Bits to send per second", OFFSET(bitrate), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, .flags = E },
122  { "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 },
123  { "localport", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, D|E },
124  { "local_port", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
125  { "localaddr", "Local address", OFFSET(localaddr), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
126  { "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 },
127  { "pkt_size", "Maximum UDP packet size", OFFSET(pkt_size), AV_OPT_TYPE_INT, { .i64 = 1472 }, -1, INT_MAX, .flags = D|E },
128  { "reuse", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, D|E },
129  { "reuse_socket", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, .flags = D|E },
130  { "broadcast", "explicitly allow or disallow broadcast destination", OFFSET(is_broadcast), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
131  { "ttl", "Time to live (multicast only)", OFFSET(ttl), AV_OPT_TYPE_INT, { .i64 = 16 }, 0, INT_MAX, E },
132  { "connect", "set if connect() should be called on socket", OFFSET(is_connected), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, .flags = D|E },
133  { "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 },
134  { "overrun_nonfatal", "survive in case of UDP receiving circular buffer overrun", OFFSET(overrun_nonfatal), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, D },
135  { "timeout", "set raise error timeout (only in read mode)", OFFSET(timeout), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, D },
136  { "sources", "Source list", OFFSET(sources), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
137  { "block", "Block list", OFFSET(block), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
138  { NULL }
139 };
140 
141 static const AVClass udp_class = {
142  .class_name = "udp",
143  .item_name = av_default_item_name,
144  .option = options,
145  .version = LIBAVUTIL_VERSION_INT,
146 };
147 
149  .class_name = "udplite",
150  .item_name = av_default_item_name,
151  .option = options,
152  .version = LIBAVUTIL_VERSION_INT,
153 };
154 
155 static int udp_set_multicast_ttl(int sockfd, int mcastTTL,
156  struct sockaddr *addr)
157 {
158 #ifdef IP_MULTICAST_TTL
159  if (addr->sa_family == AF_INET) {
160  if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) {
161  ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_MULTICAST_TTL)");
162  return -1;
163  }
164  }
165 #endif
166 #if defined(IPPROTO_IPV6) && defined(IPV6_MULTICAST_HOPS)
167  if (addr->sa_family == AF_INET6) {
168  if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) {
169  ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_MULTICAST_HOPS)");
170  return -1;
171  }
172  }
173 #endif
174  return 0;
175 }
176 
177 static int udp_join_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr)
178 {
179 #ifdef IP_ADD_MEMBERSHIP
180  if (addr->sa_family == AF_INET) {
181  struct ip_mreq mreq;
182 
183  mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
184  if (local_addr)
185  mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
186  else
187  mreq.imr_interface.s_addr= INADDR_ANY;
188  if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
189  ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP)");
190  return -1;
191  }
192  }
193 #endif
194 #if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
195  if (addr->sa_family == AF_INET6) {
196  struct ipv6_mreq mreq6;
197 
198  memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
199  //TODO: Interface index should be looked up from local_addr
200  mreq6.ipv6mr_interface= 0;
201  if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
202  ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_ADD_MEMBERSHIP)");
203  return -1;
204  }
205  }
206 #endif
207  return 0;
208 }
209 
210 static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr)
211 {
212 #ifdef IP_DROP_MEMBERSHIP
213  if (addr->sa_family == AF_INET) {
214  struct ip_mreq mreq;
215 
216  mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
217  if (local_addr)
218  mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
219  else
220  mreq.imr_interface.s_addr= INADDR_ANY;
221  if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
222  ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP)");
223  return -1;
224  }
225  }
226 #endif
227 #if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
228  if (addr->sa_family == AF_INET6) {
229  struct ipv6_mreq mreq6;
230 
231  memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
232  //TODO: Interface index should be looked up from local_addr
233  mreq6.ipv6mr_interface= 0;
234  if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
235  ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_DROP_MEMBERSHIP)");
236  return -1;
237  }
238  }
239 #endif
240  return 0;
241 }
242 
244  int sockfd, struct sockaddr *addr,
245  int addr_len, struct sockaddr_storage *local_addr,
246  struct sockaddr_storage *sources,
247  int nb_sources, int include)
248 {
249  int i;
250  if (addr->sa_family != AF_INET) {
251 #if HAVE_STRUCT_GROUP_SOURCE_REQ && defined(MCAST_BLOCK_SOURCE)
252  /* For IPv4 prefer the old approach, as that alone works reliably on
253  * Windows and it also supports supplying the interface based on its
254  * address. */
255  int i;
256  for (i = 0; i < nb_sources; i++) {
257  struct group_source_req mreqs;
258  int level = addr->sa_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
259 
260  //TODO: Interface index should be looked up from local_addr
261  mreqs.gsr_interface = 0;
262  memcpy(&mreqs.gsr_group, addr, addr_len);
263  memcpy(&mreqs.gsr_source, &sources[i], sizeof(*sources));
264 
265  if (setsockopt(sockfd, level,
266  include ? MCAST_JOIN_SOURCE_GROUP : MCAST_BLOCK_SOURCE,
267  (const void *)&mreqs, sizeof(mreqs)) < 0) {
268  if (include)
269  ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_JOIN_SOURCE_GROUP)");
270  else
271  ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_BLOCK_SOURCE)");
272  return ff_neterrno();
273  }
274  }
275  return 0;
276 #else
278  "Setting multicast sources only supported for IPv4\n");
279  return AVERROR(EINVAL);
280 #endif
281  }
282 #if HAVE_STRUCT_IP_MREQ_SOURCE && defined(IP_BLOCK_SOURCE)
283  for (i = 0; i < nb_sources; i++) {
284  struct ip_mreq_source mreqs;
285  if (sources[i].ss_family != AF_INET) {
286  av_log(NULL, AV_LOG_ERROR, "Source/block address %d is of incorrect protocol family\n", i + 1);
287  return AVERROR(EINVAL);
288  }
289 
290  mreqs.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
291  if (local_addr)
292  mreqs.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
293  else
294  mreqs.imr_interface.s_addr= INADDR_ANY;
295  mreqs.imr_sourceaddr.s_addr = ((struct sockaddr_in *)&sources[i])->sin_addr.s_addr;
296 
297  if (setsockopt(sockfd, IPPROTO_IP,
298  include ? IP_ADD_SOURCE_MEMBERSHIP : IP_BLOCK_SOURCE,
299  (const void *)&mreqs, sizeof(mreqs)) < 0) {
300  if (include)
301  ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_SOURCE_MEMBERSHIP)");
302  else
303  ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_BLOCK_SOURCE)");
304  return ff_neterrno();
305  }
306  }
307 #else
308  return AVERROR(ENOSYS);
309 #endif
310  return 0;
311 }
313  struct sockaddr_storage *addr,
314  const char *hostname, int port)
315 {
316  struct addrinfo *res0;
317  int addr_len;
318 
319  res0 = ff_ip_resolve_host(h, hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
320  if (!res0) return AVERROR(EIO);
321  memcpy(addr, res0->ai_addr, res0->ai_addrlen);
322  addr_len = res0->ai_addrlen;
323  freeaddrinfo(res0);
324 
325  return addr_len;
326 }
327 
328 static int udp_socket_create(URLContext *h, struct sockaddr_storage *addr,
329  socklen_t *addr_len, const char *localaddr)
330 {
331  UDPContext *s = h->priv_data;
332  int udp_fd = -1;
333  struct addrinfo *res0, *res;
334  int family = AF_UNSPEC;
335 
336  if (((struct sockaddr *) &s->dest_addr)->sa_family)
337  family = ((struct sockaddr *) &s->dest_addr)->sa_family;
338  res0 = ff_ip_resolve_host(h, (localaddr && localaddr[0]) ? localaddr : NULL,
339  s->local_port,
340  SOCK_DGRAM, family, AI_PASSIVE);
341  if (!res0)
342  goto fail;
343  for (res = res0; res; res=res->ai_next) {
344  if (s->udplite_coverage)
345  udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, IPPROTO_UDPLITE);
346  else
347  udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, 0);
348  if (udp_fd != -1) break;
349  ff_log_net_error(NULL, AV_LOG_ERROR, "socket");
350  }
351 
352  if (udp_fd < 0)
353  goto fail;
354 
355  memcpy(addr, res->ai_addr, res->ai_addrlen);
356  *addr_len = res->ai_addrlen;
357 
358  freeaddrinfo(res0);
359 
360  return udp_fd;
361 
362  fail:
363  if (udp_fd >= 0)
364  closesocket(udp_fd);
365  if(res0)
366  freeaddrinfo(res0);
367  return -1;
368 }
369 
370 static int udp_port(struct sockaddr_storage *addr, int addr_len)
371 {
372  char sbuf[sizeof(int)*3+1];
373  int error;
374 
375  if ((error = getnameinfo((struct sockaddr *)addr, addr_len, NULL, 0, sbuf, sizeof(sbuf), NI_NUMERICSERV)) != 0) {
376  av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(error));
377  return -1;
378  }
379 
380  return strtol(sbuf, NULL, 10);
381 }
382 
383 
384 /**
385  * If no filename is given to av_open_input_file because you want to
386  * get the local port first, then you must call this function to set
387  * the remote server address.
388  *
389  * url syntax: udp://host:port[?option=val...]
390  * option: 'ttl=n' : set the ttl value (for multicast only)
391  * 'localport=n' : set the local port
392  * 'pkt_size=n' : set max packet size
393  * 'reuse=1' : enable reusing the socket
394  * 'overrun_nonfatal=1': survive in case of circular buffer overrun
395  *
396  * @param h media file context
397  * @param uri of the remote server
398  * @return zero if no error.
399  */
400 int ff_udp_set_remote_url(URLContext *h, const char *uri)
401 {
402  UDPContext *s = h->priv_data;
403  char hostname[256], buf[10];
404  int port;
405  const char *p;
406 
407  av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
408 
409  /* set the destination address */
410  s->dest_addr_len = udp_set_url(h, &s->dest_addr, hostname, port);
411  if (s->dest_addr_len < 0) {
412  return AVERROR(EIO);
413  }
414  s->is_multicast = ff_is_multicast_address((struct sockaddr*) &s->dest_addr);
415  p = strchr(uri, '?');
416  if (p) {
417  if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
418  int was_connected = s->is_connected;
419  s->is_connected = strtol(buf, NULL, 10);
420  if (s->is_connected && !was_connected) {
421  if (connect(s->udp_fd, (struct sockaddr *) &s->dest_addr,
422  s->dest_addr_len)) {
423  s->is_connected = 0;
424  ff_log_net_error(h, AV_LOG_ERROR, "connect");
425  return AVERROR(EIO);
426  }
427  }
428  }
429  }
430 
431  return 0;
432 }
433 
434 /**
435  * Return the local port used by the UDP connection
436  * @param h media file context
437  * @return the local port number
438  */
440 {
441  UDPContext *s = h->priv_data;
442  return s->local_port;
443 }
444 
445 /**
446  * Return the udp file handle for select() usage to wait for several RTP
447  * streams at the same time.
448  * @param h media file context
449  */
451 {
452  UDPContext *s = h->priv_data;
453  return s->udp_fd;
454 }
455 
456 #if HAVE_PTHREAD_CANCEL
457 static void *circular_buffer_task_rx( void *_URLContext)
458 {
459  URLContext *h = _URLContext;
460  UDPContext *s = h->priv_data;
461  int old_cancelstate;
462 
463  pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
464  pthread_mutex_lock(&s->mutex);
465  if (ff_socket_nonblock(s->udp_fd, 0) < 0) {
466  av_log(h, AV_LOG_ERROR, "Failed to set blocking mode");
467  s->circular_buffer_error = AVERROR(EIO);
468  goto end;
469  }
470  while(1) {
471  int len;
472  struct sockaddr_storage addr;
473  socklen_t addr_len = sizeof(addr);
474 
475  pthread_mutex_unlock(&s->mutex);
476  /* Blocking operations are always cancellation points;
477  see "General Information" / "Thread Cancelation Overview"
478  in Single Unix. */
479  pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_cancelstate);
480  len = recvfrom(s->udp_fd, s->tmp+4, sizeof(s->tmp)-4, 0, (struct sockaddr *)&addr, &addr_len);
481  pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
482  pthread_mutex_lock(&s->mutex);
483  if (len < 0) {
484  if (ff_neterrno() != AVERROR(EAGAIN) && ff_neterrno() != AVERROR(EINTR)) {
486  goto end;
487  }
488  continue;
489  }
490  if (ff_ip_check_source_lists(&addr, &s->filters))
491  continue;
492  AV_WL32(s->tmp, len);
493 
494  if(av_fifo_space(s->fifo) < len + 4) {
495  /* No Space left */
496  if (s->overrun_nonfatal) {
497  av_log(h, AV_LOG_WARNING, "Circular buffer overrun. "
498  "Surviving due to overrun_nonfatal option\n");
499  continue;
500  } else {
501  av_log(h, AV_LOG_ERROR, "Circular buffer overrun. "
502  "To avoid, increase fifo_size URL option. "
503  "To survive in such case, use overrun_nonfatal option\n");
504  s->circular_buffer_error = AVERROR(EIO);
505  goto end;
506  }
507  }
508  av_fifo_generic_write(s->fifo, s->tmp, len+4, NULL);
509  pthread_cond_signal(&s->cond);
510  }
511 
512 end:
513  pthread_cond_signal(&s->cond);
514  pthread_mutex_unlock(&s->mutex);
515  return NULL;
516 }
517 
518 static void *circular_buffer_task_tx( void *_URLContext)
519 {
520  URLContext *h = _URLContext;
521  UDPContext *s = h->priv_data;
522  int old_cancelstate;
523  int64_t target_timestamp = av_gettime_relative();
524  int64_t start_timestamp = av_gettime_relative();
525  int64_t sent_bits = 0;
526  int64_t burst_interval = s->bitrate ? (s->burst_bits * 1000000 / s->bitrate) : 0;
527  int64_t max_delay = s->bitrate ? ((int64_t)h->max_packet_size * 8 * 1000000 / s->bitrate + 1) : 0;
528 
529  pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
530  pthread_mutex_lock(&s->mutex);
531 
532  if (ff_socket_nonblock(s->udp_fd, 0) < 0) {
533  av_log(h, AV_LOG_ERROR, "Failed to set blocking mode");
534  s->circular_buffer_error = AVERROR(EIO);
535  goto end;
536  }
537 
538  for(;;) {
539  int len;
540  const uint8_t *p;
541  uint8_t tmp[4];
542  int64_t timestamp;
543 
544  len=av_fifo_size(s->fifo);
545 
546  while (len<4) {
547  if (s->close_req)
548  goto end;
549  if (pthread_cond_wait(&s->cond, &s->mutex) < 0) {
550  goto end;
551  }
552  len=av_fifo_size(s->fifo);
553  }
554 
555  av_fifo_generic_read(s->fifo, tmp, 4, NULL);
556  len=AV_RL32(tmp);
557 
558  av_assert0(len >= 0);
559  av_assert0(len <= sizeof(s->tmp));
560 
561  av_fifo_generic_read(s->fifo, s->tmp, len, NULL);
562 
563  pthread_mutex_unlock(&s->mutex);
564  pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_cancelstate);
565 
566  if (s->bitrate) {
567  timestamp = av_gettime_relative();
568  if (timestamp < target_timestamp) {
569  int64_t delay = target_timestamp - timestamp;
570  if (delay > max_delay) {
571  delay = max_delay;
572  start_timestamp = timestamp + delay;
573  sent_bits = 0;
574  }
575  av_usleep(delay);
576  } else {
577  if (timestamp - burst_interval > target_timestamp) {
578  start_timestamp = timestamp - burst_interval;
579  sent_bits = 0;
580  }
581  }
582  sent_bits += len * 8;
583  target_timestamp = start_timestamp + sent_bits * 1000000 / s->bitrate;
584  }
585 
586  p = s->tmp;
587  while (len) {
588  int ret;
589  av_assert0(len > 0);
590  if (!s->is_connected) {
591  ret = sendto (s->udp_fd, p, len, 0,
592  (struct sockaddr *) &s->dest_addr,
593  s->dest_addr_len);
594  } else
595  ret = send(s->udp_fd, p, len, 0);
596  if (ret >= 0) {
597  len -= ret;
598  p += ret;
599  } else {
600  ret = ff_neterrno();
601  if (ret != AVERROR(EAGAIN) && ret != AVERROR(EINTR)) {
602  pthread_mutex_lock(&s->mutex);
603  s->circular_buffer_error = ret;
604  pthread_mutex_unlock(&s->mutex);
605  return NULL;
606  }
607  }
608  }
609 
610  pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
611  pthread_mutex_lock(&s->mutex);
612  }
613 
614 end:
615  pthread_mutex_unlock(&s->mutex);
616  return NULL;
617 }
618 
619 
620 #endif
621 
622 /* put it in UDP context */
623 /* return non zero if error */
624 static int udp_open(URLContext *h, const char *uri, int flags)
625 {
626  char hostname[1024], localaddr[1024] = "";
627  int port, udp_fd = -1, tmp, bind_ret = -1, dscp = -1;
628  UDPContext *s = h->priv_data;
629  int is_output;
630  const char *p;
631  char buf[256];
632  struct sockaddr_storage my_addr;
633  socklen_t len;
634 
635  h->is_streamed = 1;
636 
637  is_output = !(flags & AVIO_FLAG_READ);
638  if (s->buffer_size < 0)
639  s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE;
640 
641  if (s->sources) {
642  if (ff_ip_parse_sources(h, s->sources, &s->filters) < 0)
643  goto fail;
644  }
645 
646  if (s->block) {
647  if (ff_ip_parse_blocks(h, s->block, &s->filters) < 0)
648  goto fail;
649  }
650 
651  if (s->pkt_size > 0)
652  h->max_packet_size = s->pkt_size;
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 (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 (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 {
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 (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  goto fail;
769  }
770 
771  if (s->is_broadcast) {
772 #ifdef SO_BROADCAST
773  if (setsockopt (udp_fd, SOL_SOCKET, SO_BROADCAST, &(s->is_broadcast), sizeof(s->is_broadcast)) != 0)
774 #endif
775  goto fail;
776  }
777 
778  /* Set the checksum coverage for UDP-Lite (RFC 3828) for sending and receiving.
779  * The receiver coverage has to be less than or equal to the sender coverage.
780  * Otherwise, the receiver will drop all packets.
781  */
782  if (s->udplite_coverage) {
783  if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
784  av_log(h, AV_LOG_WARNING, "socket option UDPLITE_SEND_CSCOV not available");
785 
786  if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
787  av_log(h, AV_LOG_WARNING, "socket option UDPLITE_RECV_CSCOV not available");
788  }
789 
790  if (dscp >= 0) {
791  dscp <<= 2;
792  if (setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp)) != 0)
793  goto fail;
794  }
795 
796  /* If multicast, try binding the multicast address first, to avoid
797  * receiving UDP packets from other sources aimed at the same UDP
798  * port. This fails on windows. This makes sending to the same address
799  * using sendto() fail, so only do it if we're opened in read-only mode. */
800  if (s->is_multicast && !(h->flags & AVIO_FLAG_WRITE)) {
801  bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
802  }
803  /* bind to the local address if not multicast or if the multicast
804  * bind failed */
805  /* the bind is needed to give a port to the socket now */
806  if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) {
807  ff_log_net_error(h, AV_LOG_ERROR, "bind failed");
808  goto fail;
809  }
810 
811  len = sizeof(my_addr);
812  getsockname(udp_fd, (struct sockaddr *)&my_addr, &len);
813  s->local_port = udp_port(&my_addr, len);
814 
815  if (s->is_multicast) {
816  if (h->flags & AVIO_FLAG_WRITE) {
817  /* output */
818  if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
819  goto fail;
820  }
821  if (h->flags & AVIO_FLAG_READ) {
822  /* input */
823  if (s->filters.nb_include_addrs) {
824  if (udp_set_multicast_sources(h, udp_fd,
825  (struct sockaddr *)&s->dest_addr,
828  s->filters.nb_include_addrs, 1) < 0)
829  goto fail;
830  } else {
831  if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage) < 0)
832  goto fail;
833  }
834  if (s->filters.nb_exclude_addrs) {
835  if (udp_set_multicast_sources(h, udp_fd,
836  (struct sockaddr *)&s->dest_addr,
839  s->filters.nb_exclude_addrs, 0) < 0)
840  goto fail;
841  }
842  }
843  }
844 
845  if (is_output) {
846  /* limit the tx buf size to limit latency */
847  tmp = s->buffer_size;
848  if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
849  ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)");
850  goto fail;
851  }
852  } else {
853  /* set udp recv buffer size to the requested value (default 64K) */
854  tmp = s->buffer_size;
855  if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) {
856  ff_log_net_error(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF)");
857  }
858  len = sizeof(tmp);
859  if (getsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, &len) < 0) {
860  ff_log_net_error(h, AV_LOG_WARNING, "getsockopt(SO_RCVBUF)");
861  } else {
862  av_log(h, AV_LOG_DEBUG, "end receive buffer size reported is %d\n", tmp);
863  if(tmp < s->buffer_size)
864  av_log(h, AV_LOG_WARNING, "attempted to set receive buffer to size %d but it only ended up set as %d", s->buffer_size, tmp);
865  }
866 
867  /* make the socket non-blocking */
868  ff_socket_nonblock(udp_fd, 1);
869  }
870  if (s->is_connected) {
871  if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) {
872  ff_log_net_error(h, AV_LOG_ERROR, "connect");
873  goto fail;
874  }
875  }
876 
877  s->udp_fd = udp_fd;
878 
879 #if HAVE_PTHREAD_CANCEL
880  /*
881  Create thread in case of:
882  1. Input and circular_buffer_size is set
883  2. Output and bitrate and circular_buffer_size is set
884  */
885 
886  if (is_output && s->bitrate && !s->circular_buffer_size) {
887  /* Warn user in case of 'circular_buffer_size' is not set */
888  av_log(h, AV_LOG_WARNING,"'bitrate' option was set but 'circular_buffer_size' is not, but required\n");
889  }
890 
891  if ((!is_output && s->circular_buffer_size) || (is_output && s->bitrate && s->circular_buffer_size)) {
892  int ret;
893 
894  /* start the task going */
896  ret = pthread_mutex_init(&s->mutex, NULL);
897  if (ret != 0) {
898  av_log(h, AV_LOG_ERROR, "pthread_mutex_init failed : %s\n", strerror(ret));
899  goto fail;
900  }
901  ret = pthread_cond_init(&s->cond, NULL);
902  if (ret != 0) {
903  av_log(h, AV_LOG_ERROR, "pthread_cond_init failed : %s\n", strerror(ret));
904  goto cond_fail;
905  }
906  ret = pthread_create(&s->circular_buffer_thread, NULL, is_output?circular_buffer_task_tx:circular_buffer_task_rx, h);
907  if (ret != 0) {
908  av_log(h, AV_LOG_ERROR, "pthread_create failed : %s\n", strerror(ret));
909  goto thread_fail;
910  }
911  s->thread_started = 1;
912  }
913 #endif
914 
915  return 0;
916 #if HAVE_PTHREAD_CANCEL
917  thread_fail:
918  pthread_cond_destroy(&s->cond);
919  cond_fail:
920  pthread_mutex_destroy(&s->mutex);
921 #endif
922  fail:
923  if (udp_fd >= 0)
924  closesocket(udp_fd);
925  av_fifo_freep(&s->fifo);
927  return AVERROR(EIO);
928 }
929 
930 static int udplite_open(URLContext *h, const char *uri, int flags)
931 {
932  UDPContext *s = h->priv_data;
933 
934  // set default checksum coverage
936 
937  return udp_open(h, uri, flags);
938 }
939 
940 static int udp_read(URLContext *h, uint8_t *buf, int size)
941 {
942  UDPContext *s = h->priv_data;
943  int ret;
944  struct sockaddr_storage addr;
945  socklen_t addr_len = sizeof(addr);
946 #if HAVE_PTHREAD_CANCEL
947  int avail, nonblock = h->flags & AVIO_FLAG_NONBLOCK;
948 
949  if (s->fifo) {
950  pthread_mutex_lock(&s->mutex);
951  do {
952  avail = av_fifo_size(s->fifo);
953  if (avail) { // >=size) {
954  uint8_t tmp[4];
955 
956  av_fifo_generic_read(s->fifo, tmp, 4, NULL);
957  avail= AV_RL32(tmp);
958  if(avail > size){
959  av_log(h, AV_LOG_WARNING, "Part of datagram lost due to insufficient buffer size\n");
960  avail= size;
961  }
962 
963  av_fifo_generic_read(s->fifo, buf, avail, NULL);
964  av_fifo_drain(s->fifo, AV_RL32(tmp) - avail);
965  pthread_mutex_unlock(&s->mutex);
966  return avail;
967  } else if(s->circular_buffer_error){
968  int err = s->circular_buffer_error;
969  pthread_mutex_unlock(&s->mutex);
970  return err;
971  } else if(nonblock) {
972  pthread_mutex_unlock(&s->mutex);
973  return AVERROR(EAGAIN);
974  }
975  else {
976  /* FIXME: using the monotonic clock would be better,
977  but it does not exist on all supported platforms. */
978  int64_t t = av_gettime() + 100000;
979  struct timespec tv = { .tv_sec = t / 1000000,
980  .tv_nsec = (t % 1000000) * 1000 };
981  if (pthread_cond_timedwait(&s->cond, &s->mutex, &tv) < 0) {
982  pthread_mutex_unlock(&s->mutex);
983  return AVERROR(errno == ETIMEDOUT ? EAGAIN : errno);
984  }
985  nonblock = 1;
986  }
987  } while( 1);
988  }
989 #endif
990 
991  if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
992  ret = ff_network_wait_fd(s->udp_fd, 0);
993  if (ret < 0)
994  return ret;
995  }
996  ret = recvfrom(s->udp_fd, buf, size, 0, (struct sockaddr *)&addr, &addr_len);
997  if (ret < 0)
998  return ff_neterrno();
999  if (ff_ip_check_source_lists(&addr, &s->filters))
1000  return AVERROR(EINTR);
1001  return ret;
1002 }
1003 
1004 static int udp_write(URLContext *h, const uint8_t *buf, int size)
1005 {
1006  UDPContext *s = h->priv_data;
1007  int ret;
1008 
1009 #if HAVE_PTHREAD_CANCEL
1010  if (s->fifo) {
1011  uint8_t tmp[4];
1012 
1013  pthread_mutex_lock(&s->mutex);
1014 
1015  /*
1016  Return error if last tx failed.
1017  Here we can't know on which packet error was, but it needs to know that error exists.
1018  */
1019  if (s->circular_buffer_error<0) {
1020  int err=s->circular_buffer_error;
1021  pthread_mutex_unlock(&s->mutex);
1022  return err;
1023  }
1024 
1025  if(av_fifo_space(s->fifo) < size + 4) {
1026  /* What about a partial packet tx ? */
1027  pthread_mutex_unlock(&s->mutex);
1028  return AVERROR(ENOMEM);
1029  }
1030  AV_WL32(tmp, size);
1031  av_fifo_generic_write(s->fifo, tmp, 4, NULL); /* size of packet */
1032  av_fifo_generic_write(s->fifo, (uint8_t *)buf, size, NULL); /* the data */
1033  pthread_cond_signal(&s->cond);
1034  pthread_mutex_unlock(&s->mutex);
1035  return size;
1036  }
1037 #endif
1038  if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
1039  ret = ff_network_wait_fd(s->udp_fd, 1);
1040  if (ret < 0)
1041  return ret;
1042  }
1043 
1044  if (!s->is_connected) {
1045  ret = sendto (s->udp_fd, buf, size, 0,
1046  (struct sockaddr *) &s->dest_addr,
1047  s->dest_addr_len);
1048  } else
1049  ret = send(s->udp_fd, buf, size, 0);
1050 
1051  return ret < 0 ? ff_neterrno() : ret;
1052 }
1053 
1054 static int udp_close(URLContext *h)
1055 {
1056  UDPContext *s = h->priv_data;
1057 
1058 #if HAVE_PTHREAD_CANCEL
1059  // Request close once writing is finished
1060  if (s->thread_started && !(h->flags & AVIO_FLAG_READ)) {
1061  pthread_mutex_lock(&s->mutex);
1062  s->close_req = 1;
1063  pthread_cond_signal(&s->cond);
1064  pthread_mutex_unlock(&s->mutex);
1065  }
1066 #endif
1067 
1068  if (s->is_multicast && (h->flags & AVIO_FLAG_READ))
1069  udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage);
1070 #if HAVE_PTHREAD_CANCEL
1071  if (s->thread_started) {
1072  int ret;
1073  // Cancel only read, as write has been signaled as success to the user
1074  if (h->flags & AVIO_FLAG_READ)
1075  pthread_cancel(s->circular_buffer_thread);
1076  ret = pthread_join(s->circular_buffer_thread, NULL);
1077  if (ret != 0)
1078  av_log(h, AV_LOG_ERROR, "pthread_join(): %s\n", strerror(ret));
1079  pthread_mutex_destroy(&s->mutex);
1080  pthread_cond_destroy(&s->cond);
1081  }
1082 #endif
1083  closesocket(s->udp_fd);
1084  av_fifo_freep(&s->fifo);
1086  return 0;
1087 }
1088 
1090  .name = "udp",
1091  .url_open = udp_open,
1092  .url_read = udp_read,
1093  .url_write = udp_write,
1094  .url_close = udp_close,
1095  .url_get_file_handle = udp_get_file_handle,
1096  .priv_data_size = sizeof(UDPContext),
1097  .priv_data_class = &udp_class,
1099 };
1100 
1102  .name = "udplite",
1103  .url_open = udplite_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 = &udplite_context_class,
1111 };
static int udp_open(URLContext *h, const char *uri, int flags)
Definition: udp.c:624
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:4728
#define NULL
Definition: coverity.c:32
static const AVClass udplite_context_class
Definition: udp.c:148
static av_always_inline int pthread_mutex_destroy(pthread_mutex_t *mutex)
Definition: os2threads.h:108
static AVMutex mutex
Definition: log.c:44
#define URL_PROTOCOL_FLAG_NETWORK
Definition: url.h:34
#define pthread_mutex_lock(a)
Definition: ffprobe.c:61
#define NI_NUMERICSERV
Definition: network.h:200
static av_always_inline int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
Definition: os2threads.h:166
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:1101
char * block
Definition: udp.c:112
int is_streamed
true if streamed (no seek possible), default = false
Definition: url.h:45
#define AVIO_FLAG_READ
read-only
Definition: avio.h:654
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
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:312
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:655
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:176
#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:81
#define freeaddrinfo
Definition: network.h:215
int av_usleep(unsigned usec)
Sleep for a period of time.
Definition: time.c:84
static av_always_inline int pthread_cond_destroy(pthread_cond_t *cond)
Definition: os2threads.h:140
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:97
int(* cond)(enum AVPixelFormat pix_fmt)
Definition: pixdesc_query.c:28
static int16_t block[64]
Definition: dct.c:115
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:439
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
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:85
static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr, struct sockaddr *local_addr)
Definition: udp.c:210
#define UDP_HEADER_SIZE
Definition: udp.c:75
static int udp_port(struct sockaddr_storage *addr, int addr_len)
Definition: udp.c:370
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:749
static av_always_inline int pthread_cond_signal(pthread_cond_t *cond)
Definition: os2threads.h:148
ptrdiff_t size
Definition: opengl_enc.c:101
static int udp_close(URLContext *h)
Definition: udp.c:1054
#define av_log(a,...)
IPSourceFilters filters
Definition: udp.c:113
int circular_buffer_size
Definition: udp.c:94
#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:400
#define AVERROR(e)
Definition: error.h:43
#define E
Definition: udp.c:118
#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:87
#define UDP_TX_BUF_SIZE
Definition: udp.c:73
simple assert() macros that are a bit more flexible than ISO C assert().
#define D
Definition: udp.c:117
int dest_addr_len
Definition: udp.c:90
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:118
int timeout
Definition: udp.c:109
#define OFFSET(x)
Definition: udp.c:116
char * localaddr
Definition: udp.c:108
int ai_addrlen
Definition: network.h:139
static const AVOption options[]
Definition: udp.c:119
uint8_t tmp[UDP_MAX_PKT_SIZE+4]
Definition: udp.c:106
#define ff_neterrno()
Definition: network.h:65
int overrun_nonfatal
Definition: udp.c:88
static av_always_inline int pthread_join(pthread_t thread, void **value_ptr)
Definition: os2threads.h:90
static av_always_inline int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)
Definition: os2threads.h:100
#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:450
int is_connected
Definition: udp.c:91
#define pthread_mutex_unlock(a)
Definition: ffprobe.c:65
struct sockaddr_storage local_addr_storage
Definition: udp.c:110
Definition: udp.c:77
int ff_socket_nonblock(int socket, int enable)
int64_t burst_bits
Definition: udp.c:98
static void error(const char *err)
int ttl
Definition: udp.c:80
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:76
#define IPV6_ADD_MEMBERSHIP
Definition: udp.c:69
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:673
int local_port
Definition: udp.c:86
int pkt_size
Definition: udp.c:83
#define IPV6_DROP_MEMBERSHIP
Definition: udp.c:70
a very simple circular buffer FIFO implementation
void * buf
Definition: avisynth_c.h:690
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:111
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:243
void * priv_data
Definition: url.h:41
#define gai_strerror
Definition: network.h:222
AVFifoBuffer * fifo
Definition: udp.c:95
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:606
uint8_t level
Definition: svq3.c:207
int64_t bitrate
Definition: h264_levels.c:89
Main libavformat public API header.
int
struct sockaddr_storage dest_addr
Definition: udp.c:89
_fmutex pthread_mutex_t
Definition: os2threads.h:49
static int udp_read(URLContext *h, uint8_t *buf, int size)
Definition: udp.c:940
int remaining_in_dg
Definition: udp.c:107
struct addrinfo * ai_next
Definition: network.h:142
static av_always_inline int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
Definition: os2threads.h:129
static int udp_set_multicast_ttl(int sockfd, int mcastTTL, struct sockaddr *addr)
Definition: udp.c:155
int udp_fd
Definition: udp.c:79
int nb_exclude_addrs
Definition: ip.h:31
#define getnameinfo
Definition: network.h:216
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:930
int len
static int udp_join_multicast_group(int sockfd, struct sockaddr *addr, struct sockaddr *local_addr)
Definition: udp.c:177
int circular_buffer_error
Definition: udp.c:96
int close_req
Definition: udp.c:99
int buffer_size
Definition: udp.c:82
static int udp_socket_create(URLContext *h, struct sockaddr_storage *addr, socklen_t *addr_len, const char *localaddr)
Definition: udp.c:328
int is_multicast
Definition: udp.c:84
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:141
#define UDP_MAX_PKT_SIZE
Definition: udp.c:74
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:140
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
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:1004
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
const URLProtocol ff_udp_protocol
Definition: udp.c:1089
static uint8_t tmp[11]
Definition: aes_ctr.c:26
int ai_family
Definition: network.h:136