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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 
45 #ifdef __APPLE__
46 #include "TargetConditionals.h"
47 #endif
48 
49 #if HAVE_UDPLITE_H
50 #include "udplite.h"
51 #else
52 /* On many Linux systems, udplite.h is missing but the kernel supports UDP-Lite.
53  * So, we provide a fallback here.
54  */
55 #define UDPLITE_SEND_CSCOV 10
56 #define UDPLITE_RECV_CSCOV 11
57 #endif
58 
59 #ifndef IPPROTO_UDPLITE
60 #define IPPROTO_UDPLITE 136
61 #endif
62 
63 #if HAVE_PTHREAD_CANCEL
64 #include <pthread.h>
65 #endif
66 
67 #ifndef HAVE_PTHREAD_CANCEL
68 #define HAVE_PTHREAD_CANCEL 0
69 #endif
70 
71 #ifndef IPV6_ADD_MEMBERSHIP
72 #define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
73 #define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
74 #endif
75 
76 #define UDP_TX_BUF_SIZE 32768
77 #define UDP_MAX_PKT_SIZE 65536
78 #define UDP_HEADER_SIZE 8
79 
80 typedef struct UDPContext {
81  const AVClass *class;
82  int udp_fd;
83  int ttl;
86  int pkt_size;
95 
96  /* Circular Buffer variables for use in UDP receive code */
100  int64_t bitrate; /* number of bits to send per second */
101  int64_t burst_bits;
103 #if HAVE_PTHREAD_CANCEL
104  pthread_t circular_buffer_thread;
106  pthread_cond_t cond;
107  int thread_started;
108 #endif
111  char *localaddr;
112  int timeout;
114  char *sources;
115  char *block;
116 } UDPContext;
117 
118 #define OFFSET(x) offsetof(UDPContext, x)
119 #define D AV_OPT_FLAG_DECODING_PARAM
120 #define E AV_OPT_FLAG_ENCODING_PARAM
121 static const AVOption options[] = {
122  { "buffer_size", "System data size (in bytes)", OFFSET(buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
123  { "bitrate", "Bits to send per second", OFFSET(bitrate), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, .flags = E },
124  { "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 },
125  { "localport", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, D|E },
126  { "local_port", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
127  { "localaddr", "Local address", OFFSET(localaddr), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
128  { "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 },
129  { "pkt_size", "Maximum UDP packet size", OFFSET(pkt_size), AV_OPT_TYPE_INT, { .i64 = 1472 }, -1, INT_MAX, .flags = D|E },
130  { "reuse", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, D|E },
131  { "reuse_socket", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, .flags = D|E },
132  { "broadcast", "explicitly allow or disallow broadcast destination", OFFSET(is_broadcast), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
133  { "ttl", "Time to live (multicast only)", OFFSET(ttl), AV_OPT_TYPE_INT, { .i64 = 16 }, 0, INT_MAX, E },
134  { "connect", "set if connect() should be called on socket", OFFSET(is_connected), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, .flags = D|E },
135  { "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 },
136  { "overrun_nonfatal", "survive in case of UDP receiving circular buffer overrun", OFFSET(overrun_nonfatal), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, D },
137  { "timeout", "set raise error timeout (only in read mode)", OFFSET(timeout), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, D },
138  { "sources", "Source list", OFFSET(sources), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
139  { "block", "Block list", OFFSET(block), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
140  { NULL }
141 };
142 
143 static const AVClass udp_class = {
144  .class_name = "udp",
145  .item_name = av_default_item_name,
146  .option = options,
147  .version = LIBAVUTIL_VERSION_INT,
148 };
149 
151  .class_name = "udplite",
152  .item_name = av_default_item_name,
153  .option = options,
154  .version = LIBAVUTIL_VERSION_INT,
155 };
156 
157 static void log_net_error(void *ctx, int level, const char* prefix)
158 {
159  char errbuf[100];
160  av_strerror(ff_neterrno(), errbuf, sizeof(errbuf));
161  av_log(ctx, level, "%s: %s\n", prefix, errbuf);
162 }
163 
164 static int udp_set_multicast_ttl(int sockfd, int mcastTTL,
165  struct sockaddr *addr)
166 {
167 #ifdef IP_MULTICAST_TTL
168  if (addr->sa_family == AF_INET) {
169  if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) {
170  log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_MULTICAST_TTL)");
171  return -1;
172  }
173  }
174 #endif
175 #if defined(IPPROTO_IPV6) && defined(IPV6_MULTICAST_HOPS)
176  if (addr->sa_family == AF_INET6) {
177  if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) {
178  log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_MULTICAST_HOPS)");
179  return -1;
180  }
181  }
182 #endif
183  return 0;
184 }
185 
186 static int udp_join_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr)
187 {
188 #ifdef IP_ADD_MEMBERSHIP
189  if (addr->sa_family == AF_INET) {
190  struct ip_mreq mreq;
191 
192  mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
193  if (local_addr)
194  mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
195  else
196  mreq.imr_interface.s_addr= INADDR_ANY;
197  if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
198  log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP)");
199  return -1;
200  }
201  }
202 #endif
203 #if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
204  if (addr->sa_family == AF_INET6) {
205  struct ipv6_mreq mreq6;
206 
207  memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
208  mreq6.ipv6mr_interface= 0;
209  if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
210  log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_ADD_MEMBERSHIP)");
211  return -1;
212  }
213  }
214 #endif
215  return 0;
216 }
217 
218 static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr)
219 {
220 #ifdef IP_DROP_MEMBERSHIP
221  if (addr->sa_family == AF_INET) {
222  struct ip_mreq mreq;
223 
224  mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
225  if (local_addr)
226  mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
227  else
228  mreq.imr_interface.s_addr= INADDR_ANY;
229  if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
230  log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP)");
231  return -1;
232  }
233  }
234 #endif
235 #if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
236  if (addr->sa_family == AF_INET6) {
237  struct ipv6_mreq mreq6;
238 
239  memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
240  mreq6.ipv6mr_interface= 0;
241  if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
242  log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_DROP_MEMBERSHIP)");
243  return -1;
244  }
245  }
246 #endif
247  return 0;
248 }
249 
251  const char *hostname, int port,
252  int type, int family, int flags)
253 {
254  struct addrinfo hints = { 0 }, *res = 0;
255  int error;
256  char sport[16];
257  const char *node = 0, *service = "0";
258 
259  if (port > 0) {
260  snprintf(sport, sizeof(sport), "%d", port);
261  service = sport;
262  }
263  if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) {
264  node = hostname;
265  }
266  hints.ai_socktype = type;
267  hints.ai_family = family;
268  hints.ai_flags = flags;
269  if ((error = getaddrinfo(node, service, &hints, &res))) {
270  res = NULL;
271  av_log(h, AV_LOG_ERROR, "getaddrinfo(%s, %s): %s\n",
272  node ? node : "unknown",
273  service,
274  gai_strerror(error));
275  }
276 
277  return res;
278 }
279 
281  int sockfd, struct sockaddr *addr,
282  int addr_len, char **sources,
283  int nb_sources, int include)
284 {
285 #if HAVE_STRUCT_GROUP_SOURCE_REQ && defined(MCAST_BLOCK_SOURCE) && !defined(_WIN32) && (!defined(TARGET_OS_TV) || !TARGET_OS_TV)
286  /* These ones are available in the microsoft SDK, but don't seem to work
287  * as on linux, so just prefer the v4-only approach there for now. */
288  int i;
289  for (i = 0; i < nb_sources; i++) {
290  struct group_source_req mreqs;
291  int level = addr->sa_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
292  struct addrinfo *sourceaddr = udp_resolve_host(h, sources[i], 0,
293  SOCK_DGRAM, AF_UNSPEC,
294  0);
295  if (!sourceaddr)
296  return AVERROR(ENOENT);
297 
298  mreqs.gsr_interface = 0;
299  memcpy(&mreqs.gsr_group, addr, addr_len);
300  memcpy(&mreqs.gsr_source, sourceaddr->ai_addr, sourceaddr->ai_addrlen);
301  freeaddrinfo(sourceaddr);
302 
303  if (setsockopt(sockfd, level,
304  include ? MCAST_JOIN_SOURCE_GROUP : MCAST_BLOCK_SOURCE,
305  (const void *)&mreqs, sizeof(mreqs)) < 0) {
306  if (include)
307  log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_JOIN_SOURCE_GROUP)");
308  else
309  log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_BLOCK_SOURCE)");
310  return ff_neterrno();
311  }
312  }
313 #elif HAVE_STRUCT_IP_MREQ_SOURCE && defined(IP_BLOCK_SOURCE)
314  int i;
315  if (addr->sa_family != AF_INET) {
317  "Setting multicast sources only supported for IPv4\n");
318  return AVERROR(EINVAL);
319  }
320  for (i = 0; i < nb_sources; i++) {
321  struct ip_mreq_source mreqs;
322  struct addrinfo *sourceaddr = udp_resolve_host(h, sources[i], 0,
323  SOCK_DGRAM, AF_UNSPEC,
324  0);
325  if (!sourceaddr)
326  return AVERROR(ENOENT);
327  if (sourceaddr->ai_addr->sa_family != AF_INET) {
328  freeaddrinfo(sourceaddr);
329  av_log(NULL, AV_LOG_ERROR, "%s is of incorrect protocol family\n",
330  sources[i]);
331  return AVERROR(EINVAL);
332  }
333 
334  mreqs.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
335  mreqs.imr_interface.s_addr = INADDR_ANY;
336  mreqs.imr_sourceaddr.s_addr = ((struct sockaddr_in *)sourceaddr->ai_addr)->sin_addr.s_addr;
337  freeaddrinfo(sourceaddr);
338 
339  if (setsockopt(sockfd, IPPROTO_IP,
340  include ? IP_ADD_SOURCE_MEMBERSHIP : IP_BLOCK_SOURCE,
341  (const void *)&mreqs, sizeof(mreqs)) < 0) {
342  if (include)
343  log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_SOURCE_MEMBERSHIP)");
344  else
345  log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_BLOCK_SOURCE)");
346  return ff_neterrno();
347  }
348  }
349 #else
350  return AVERROR(ENOSYS);
351 #endif
352  return 0;
353 }
355  struct sockaddr_storage *addr,
356  const char *hostname, int port)
357 {
358  struct addrinfo *res0;
359  int addr_len;
360 
361  res0 = udp_resolve_host(h, hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
362  if (!res0) return AVERROR(EIO);
363  memcpy(addr, res0->ai_addr, res0->ai_addrlen);
364  addr_len = res0->ai_addrlen;
365  freeaddrinfo(res0);
366 
367  return addr_len;
368 }
369 
370 static int udp_socket_create(URLContext *h, struct sockaddr_storage *addr,
371  socklen_t *addr_len, const char *localaddr)
372 {
373  UDPContext *s = h->priv_data;
374  int udp_fd = -1;
375  struct addrinfo *res0, *res;
376  int family = AF_UNSPEC;
377 
378  if (((struct sockaddr *) &s->dest_addr)->sa_family)
379  family = ((struct sockaddr *) &s->dest_addr)->sa_family;
380  res0 = udp_resolve_host(h, (localaddr && localaddr[0]) ? localaddr : NULL,
381  s->local_port,
382  SOCK_DGRAM, family, AI_PASSIVE);
383  if (!res0)
384  goto fail;
385  for (res = res0; res; res=res->ai_next) {
386  if (s->udplite_coverage)
387  udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, IPPROTO_UDPLITE);
388  else
389  udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, 0);
390  if (udp_fd != -1) break;
391  log_net_error(NULL, AV_LOG_ERROR, "socket");
392  }
393 
394  if (udp_fd < 0)
395  goto fail;
396 
397  memcpy(addr, res->ai_addr, res->ai_addrlen);
398  *addr_len = res->ai_addrlen;
399 
400  freeaddrinfo(res0);
401 
402  return udp_fd;
403 
404  fail:
405  if (udp_fd >= 0)
406  closesocket(udp_fd);
407  if(res0)
408  freeaddrinfo(res0);
409  return -1;
410 }
411 
412 static int udp_port(struct sockaddr_storage *addr, int addr_len)
413 {
414  char sbuf[sizeof(int)*3+1];
415  int error;
416 
417  if ((error = getnameinfo((struct sockaddr *)addr, addr_len, NULL, 0, sbuf, sizeof(sbuf), NI_NUMERICSERV)) != 0) {
418  av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(error));
419  return -1;
420  }
421 
422  return strtol(sbuf, NULL, 10);
423 }
424 
425 
426 /**
427  * If no filename is given to av_open_input_file because you want to
428  * get the local port first, then you must call this function to set
429  * the remote server address.
430  *
431  * url syntax: udp://host:port[?option=val...]
432  * option: 'ttl=n' : set the ttl value (for multicast only)
433  * 'localport=n' : set the local port
434  * 'pkt_size=n' : set max packet size
435  * 'reuse=1' : enable reusing the socket
436  * 'overrun_nonfatal=1': survive in case of circular buffer overrun
437  *
438  * @param h media file context
439  * @param uri of the remote server
440  * @return zero if no error.
441  */
442 int ff_udp_set_remote_url(URLContext *h, const char *uri)
443 {
444  UDPContext *s = h->priv_data;
445  char hostname[256], buf[10];
446  int port;
447  const char *p;
448 
449  av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
450 
451  /* set the destination address */
452  s->dest_addr_len = udp_set_url(h, &s->dest_addr, hostname, port);
453  if (s->dest_addr_len < 0) {
454  return AVERROR(EIO);
455  }
456  s->is_multicast = ff_is_multicast_address((struct sockaddr*) &s->dest_addr);
457  p = strchr(uri, '?');
458  if (p) {
459  if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
460  int was_connected = s->is_connected;
461  s->is_connected = strtol(buf, NULL, 10);
462  if (s->is_connected && !was_connected) {
463  if (connect(s->udp_fd, (struct sockaddr *) &s->dest_addr,
464  s->dest_addr_len)) {
465  s->is_connected = 0;
466  log_net_error(h, AV_LOG_ERROR, "connect");
467  return AVERROR(EIO);
468  }
469  }
470  }
471  }
472 
473  return 0;
474 }
475 
476 /**
477  * Return the local port used by the UDP connection
478  * @param h media file context
479  * @return the local port number
480  */
482 {
483  UDPContext *s = h->priv_data;
484  return s->local_port;
485 }
486 
487 /**
488  * Return the udp file handle for select() usage to wait for several RTP
489  * streams at the same time.
490  * @param h media file context
491  */
493 {
494  UDPContext *s = h->priv_data;
495  return s->udp_fd;
496 }
497 
498 #if HAVE_PTHREAD_CANCEL
499 static void *circular_buffer_task_rx( void *_URLContext)
500 {
501  URLContext *h = _URLContext;
502  UDPContext *s = h->priv_data;
503  int old_cancelstate;
504 
505  pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
506  pthread_mutex_lock(&s->mutex);
507  if (ff_socket_nonblock(s->udp_fd, 0) < 0) {
508  av_log(h, AV_LOG_ERROR, "Failed to set blocking mode");
509  s->circular_buffer_error = AVERROR(EIO);
510  goto end;
511  }
512  while(1) {
513  int len;
514 
515  pthread_mutex_unlock(&s->mutex);
516  /* Blocking operations are always cancellation points;
517  see "General Information" / "Thread Cancelation Overview"
518  in Single Unix. */
519  pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_cancelstate);
520  len = recv(s->udp_fd, s->tmp+4, sizeof(s->tmp)-4, 0);
521  pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
522  pthread_mutex_lock(&s->mutex);
523  if (len < 0) {
524  if (ff_neterrno() != AVERROR(EAGAIN) && ff_neterrno() != AVERROR(EINTR)) {
526  goto end;
527  }
528  continue;
529  }
530  AV_WL32(s->tmp, len);
531 
532  if(av_fifo_space(s->fifo) < len + 4) {
533  /* No Space left */
534  if (s->overrun_nonfatal) {
535  av_log(h, AV_LOG_WARNING, "Circular buffer overrun. "
536  "Surviving due to overrun_nonfatal option\n");
537  continue;
538  } else {
539  av_log(h, AV_LOG_ERROR, "Circular buffer overrun. "
540  "To avoid, increase fifo_size URL option. "
541  "To survive in such case, use overrun_nonfatal option\n");
542  s->circular_buffer_error = AVERROR(EIO);
543  goto end;
544  }
545  }
546  av_fifo_generic_write(s->fifo, s->tmp, len+4, NULL);
547  pthread_cond_signal(&s->cond);
548  }
549 
550 end:
551  pthread_cond_signal(&s->cond);
552  pthread_mutex_unlock(&s->mutex);
553  return NULL;
554 }
555 
556 static void *circular_buffer_task_tx( void *_URLContext)
557 {
558  URLContext *h = _URLContext;
559  UDPContext *s = h->priv_data;
560  int old_cancelstate;
561  int64_t target_timestamp = av_gettime_relative();
562  int64_t start_timestamp = av_gettime_relative();
563  int64_t sent_bits = 0;
564  int64_t burst_interval = s->bitrate ? (s->burst_bits * 1000000 / s->bitrate) : 0;
565  int64_t max_delay = s->bitrate ? ((int64_t)h->max_packet_size * 8 * 1000000 / s->bitrate + 1) : 0;
566 
567  pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
568  pthread_mutex_lock(&s->mutex);
569 
570  if (ff_socket_nonblock(s->udp_fd, 0) < 0) {
571  av_log(h, AV_LOG_ERROR, "Failed to set blocking mode");
572  s->circular_buffer_error = AVERROR(EIO);
573  goto end;
574  }
575 
576  for(;;) {
577  int len;
578  const uint8_t *p;
579  uint8_t tmp[4];
580  int64_t timestamp;
581 
582  len=av_fifo_size(s->fifo);
583 
584  while (len<4) {
585  if (s->close_req)
586  goto end;
587  if (pthread_cond_wait(&s->cond, &s->mutex) < 0) {
588  goto end;
589  }
590  len=av_fifo_size(s->fifo);
591  }
592 
593  av_fifo_generic_read(s->fifo, tmp, 4, NULL);
594  len=AV_RL32(tmp);
595 
596  av_assert0(len >= 0);
597  av_assert0(len <= sizeof(s->tmp));
598 
599  av_fifo_generic_read(s->fifo, s->tmp, len, NULL);
600 
601  pthread_mutex_unlock(&s->mutex);
602  pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_cancelstate);
603 
604  if (s->bitrate) {
605  timestamp = av_gettime_relative();
606  if (timestamp < target_timestamp) {
607  int64_t delay = target_timestamp - timestamp;
608  if (delay > max_delay) {
609  delay = max_delay;
610  start_timestamp = timestamp + delay;
611  sent_bits = 0;
612  }
613  av_usleep(delay);
614  } else {
615  if (timestamp - burst_interval > target_timestamp) {
616  start_timestamp = timestamp - burst_interval;
617  sent_bits = 0;
618  }
619  }
620  sent_bits += len * 8;
621  target_timestamp = start_timestamp + sent_bits * 1000000 / s->bitrate;
622  }
623 
624  p = s->tmp;
625  while (len) {
626  int ret;
627  av_assert0(len > 0);
628  if (!s->is_connected) {
629  ret = sendto (s->udp_fd, p, len, 0,
630  (struct sockaddr *) &s->dest_addr,
631  s->dest_addr_len);
632  } else
633  ret = send(s->udp_fd, p, len, 0);
634  if (ret >= 0) {
635  len -= ret;
636  p += ret;
637  } else {
638  ret = ff_neterrno();
639  if (ret != AVERROR(EAGAIN) && ret != AVERROR(EINTR)) {
640  pthread_mutex_lock(&s->mutex);
641  s->circular_buffer_error = ret;
642  pthread_mutex_unlock(&s->mutex);
643  return NULL;
644  }
645  }
646  }
647 
648  pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
649  pthread_mutex_lock(&s->mutex);
650  }
651 
652 end:
653  pthread_mutex_unlock(&s->mutex);
654  return NULL;
655 }
656 
657 
658 #endif
659 
660 static int parse_source_list(char *buf, char **sources, int *num_sources,
661  int max_sources)
662 {
663  char *source_start;
664 
665  source_start = buf;
666  while (1) {
667  char *next = strchr(source_start, ',');
668  if (next)
669  *next = '\0';
670  sources[*num_sources] = av_strdup(source_start);
671  if (!sources[*num_sources])
672  return AVERROR(ENOMEM);
673  source_start = next + 1;
674  (*num_sources)++;
675  if (*num_sources >= max_sources || !next)
676  break;
677  }
678  return 0;
679 }
680 
681 /* put it in UDP context */
682 /* return non zero if error */
683 static int udp_open(URLContext *h, const char *uri, int flags)
684 {
685  char hostname[1024], localaddr[1024] = "";
686  int port, udp_fd = -1, tmp, bind_ret = -1, dscp = -1;
687  UDPContext *s = h->priv_data;
688  int is_output;
689  const char *p;
690  char buf[256];
691  struct sockaddr_storage my_addr;
692  socklen_t len;
693  int i, num_include_sources = 0, num_exclude_sources = 0;
694  char *include_sources[32], *exclude_sources[32];
695 
696  h->is_streamed = 1;
697 
698  is_output = !(flags & AVIO_FLAG_READ);
699  if (s->buffer_size < 0)
700  s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE;
701 
702  if (s->sources) {
703  if (parse_source_list(s->sources, include_sources,
704  &num_include_sources,
705  FF_ARRAY_ELEMS(include_sources)))
706  goto fail;
707  }
708 
709  if (s->block) {
710  if (parse_source_list(s->block, exclude_sources, &num_exclude_sources,
711  FF_ARRAY_ELEMS(exclude_sources)))
712  goto fail;
713  }
714 
715  if (s->pkt_size > 0)
716  h->max_packet_size = s->pkt_size;
717 
718  p = strchr(uri, '?');
719  if (p) {
720  if (av_find_info_tag(buf, sizeof(buf), "reuse", p)) {
721  char *endptr = NULL;
722  s->reuse_socket = strtol(buf, &endptr, 10);
723  /* assume if no digits were found it is a request to enable it */
724  if (buf == endptr)
725  s->reuse_socket = 1;
726  }
727  if (av_find_info_tag(buf, sizeof(buf), "overrun_nonfatal", p)) {
728  char *endptr = NULL;
729  s->overrun_nonfatal = strtol(buf, &endptr, 10);
730  /* assume if no digits were found it is a request to enable it */
731  if (buf == endptr)
732  s->overrun_nonfatal = 1;
733  if (!HAVE_PTHREAD_CANCEL)
735  "'overrun_nonfatal' option was set but it is not supported "
736  "on this build (pthread support is required)\n");
737  }
738  if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) {
739  s->ttl = strtol(buf, NULL, 10);
740  }
741  if (av_find_info_tag(buf, sizeof(buf), "udplite_coverage", p)) {
742  s->udplite_coverage = strtol(buf, NULL, 10);
743  }
744  if (av_find_info_tag(buf, sizeof(buf), "localport", p)) {
745  s->local_port = strtol(buf, NULL, 10);
746  }
747  if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
748  s->pkt_size = strtol(buf, NULL, 10);
749  }
750  if (av_find_info_tag(buf, sizeof(buf), "buffer_size", p)) {
751  s->buffer_size = strtol(buf, NULL, 10);
752  }
753  if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
754  s->is_connected = strtol(buf, NULL, 10);
755  }
756  if (av_find_info_tag(buf, sizeof(buf), "dscp", p)) {
757  dscp = strtol(buf, NULL, 10);
758  }
759  if (av_find_info_tag(buf, sizeof(buf), "fifo_size", p)) {
760  s->circular_buffer_size = strtol(buf, NULL, 10);
761  if (!HAVE_PTHREAD_CANCEL)
763  "'circular_buffer_size' option was set but it is not supported "
764  "on this build (pthread support is required)\n");
765  }
766  if (av_find_info_tag(buf, sizeof(buf), "bitrate", p)) {
767  s->bitrate = strtoll(buf, NULL, 10);
768  if (!HAVE_PTHREAD_CANCEL)
770  "'bitrate' option was set but it is not supported "
771  "on this build (pthread support is required)\n");
772  }
773  if (av_find_info_tag(buf, sizeof(buf), "burst_bits", p)) {
774  s->burst_bits = strtoll(buf, NULL, 10);
775  }
776  if (av_find_info_tag(buf, sizeof(buf), "localaddr", p)) {
777  av_strlcpy(localaddr, buf, sizeof(localaddr));
778  }
779  if (av_find_info_tag(buf, sizeof(buf), "sources", p)) {
780  if (parse_source_list(buf, include_sources, &num_include_sources,
781  FF_ARRAY_ELEMS(include_sources)))
782  goto fail;
783  }
784  if (av_find_info_tag(buf, sizeof(buf), "block", p)) {
785  if (parse_source_list(buf, exclude_sources, &num_exclude_sources,
786  FF_ARRAY_ELEMS(exclude_sources)))
787  goto fail;
788  }
789  if (!is_output && av_find_info_tag(buf, sizeof(buf), "timeout", p))
790  s->timeout = strtol(buf, NULL, 10);
791  if (is_output && av_find_info_tag(buf, sizeof(buf), "broadcast", p))
792  s->is_broadcast = strtol(buf, NULL, 10);
793  }
794  /* handling needed to support options picking from both AVOption and URL */
795  s->circular_buffer_size *= 188;
796  if (flags & AVIO_FLAG_WRITE) {
797  h->max_packet_size = s->pkt_size;
798  } else {
800  }
801  h->rw_timeout = s->timeout;
802 
803  /* fill the dest addr */
804  av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
805 
806  /* XXX: fix av_url_split */
807  if (hostname[0] == '\0' || hostname[0] == '?') {
808  /* only accepts null hostname if input */
809  if (!(flags & AVIO_FLAG_READ))
810  goto fail;
811  } else {
812  if (ff_udp_set_remote_url(h, uri) < 0)
813  goto fail;
814  }
815 
816  if ((s->is_multicast || s->local_port <= 0) && (h->flags & AVIO_FLAG_READ))
817  s->local_port = port;
818 
819  if (localaddr[0])
820  udp_fd = udp_socket_create(h, &my_addr, &len, localaddr);
821  else
822  udp_fd = udp_socket_create(h, &my_addr, &len, s->localaddr);
823  if (udp_fd < 0)
824  goto fail;
825 
826  s->local_addr_storage=my_addr; //store for future multicast join
827 
828  /* Follow the requested reuse option, unless it's multicast in which
829  * case enable reuse unless explicitly disabled.
830  */
831  if (s->reuse_socket > 0 || (s->is_multicast && s->reuse_socket < 0)) {
832  s->reuse_socket = 1;
833  if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
834  goto fail;
835  }
836 
837  if (s->is_broadcast) {
838 #ifdef SO_BROADCAST
839  if (setsockopt (udp_fd, SOL_SOCKET, SO_BROADCAST, &(s->is_broadcast), sizeof(s->is_broadcast)) != 0)
840 #endif
841  goto fail;
842  }
843 
844  /* Set the checksum coverage for UDP-Lite (RFC 3828) for sending and receiving.
845  * The receiver coverage has to be less than or equal to the sender coverage.
846  * Otherwise, the receiver will drop all packets.
847  */
848  if (s->udplite_coverage) {
849  if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
850  av_log(h, AV_LOG_WARNING, "socket option UDPLITE_SEND_CSCOV not available");
851 
852  if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
853  av_log(h, AV_LOG_WARNING, "socket option UDPLITE_RECV_CSCOV not available");
854  }
855 
856  if (dscp >= 0) {
857  dscp <<= 2;
858  if (setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp)) != 0)
859  goto fail;
860  }
861 
862  /* If multicast, try binding the multicast address first, to avoid
863  * receiving UDP packets from other sources aimed at the same UDP
864  * port. This fails on windows. This makes sending to the same address
865  * using sendto() fail, so only do it if we're opened in read-only mode. */
866  if (s->is_multicast && !(h->flags & AVIO_FLAG_WRITE)) {
867  bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
868  }
869  /* bind to the local address if not multicast or if the multicast
870  * bind failed */
871  /* the bind is needed to give a port to the socket now */
872  if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) {
873  log_net_error(h, AV_LOG_ERROR, "bind failed");
874  goto fail;
875  }
876 
877  len = sizeof(my_addr);
878  getsockname(udp_fd, (struct sockaddr *)&my_addr, &len);
879  s->local_port = udp_port(&my_addr, len);
880 
881  if (s->is_multicast) {
882  if (h->flags & AVIO_FLAG_WRITE) {
883  /* output */
884  if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
885  goto fail;
886  }
887  if (h->flags & AVIO_FLAG_READ) {
888  /* input */
889  if (num_include_sources && num_exclude_sources) {
890  av_log(h, AV_LOG_ERROR, "Simultaneously including and excluding multicast sources is not supported\n");
891  goto fail;
892  }
893  if (num_include_sources) {
894  if (udp_set_multicast_sources(h, udp_fd,
895  (struct sockaddr *)&s->dest_addr,
896  s->dest_addr_len,
897  include_sources,
898  num_include_sources, 1) < 0)
899  goto fail;
900  } else {
901  if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage) < 0)
902  goto fail;
903  }
904  if (num_exclude_sources) {
905  if (udp_set_multicast_sources(h, udp_fd,
906  (struct sockaddr *)&s->dest_addr,
907  s->dest_addr_len,
908  exclude_sources,
909  num_exclude_sources, 0) < 0)
910  goto fail;
911  }
912  }
913  }
914 
915  if (is_output) {
916  /* limit the tx buf size to limit latency */
917  tmp = s->buffer_size;
918  if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
919  log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)");
920  goto fail;
921  }
922  } else {
923  /* set udp recv buffer size to the requested value (default 64K) */
924  tmp = s->buffer_size;
925  if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) {
926  log_net_error(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF)");
927  }
928  len = sizeof(tmp);
929  if (getsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, &len) < 0) {
930  log_net_error(h, AV_LOG_WARNING, "getsockopt(SO_RCVBUF)");
931  } else {
932  av_log(h, AV_LOG_DEBUG, "end receive buffer size reported is %d\n", tmp);
933  if(tmp < s->buffer_size)
934  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);
935  }
936 
937  /* make the socket non-blocking */
938  ff_socket_nonblock(udp_fd, 1);
939  }
940  if (s->is_connected) {
941  if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) {
942  log_net_error(h, AV_LOG_ERROR, "connect");
943  goto fail;
944  }
945  }
946 
947  for (i = 0; i < num_include_sources; i++)
948  av_freep(&include_sources[i]);
949  for (i = 0; i < num_exclude_sources; i++)
950  av_freep(&exclude_sources[i]);
951 
952  s->udp_fd = udp_fd;
953 
954 #if HAVE_PTHREAD_CANCEL
955  /*
956  Create thread in case of:
957  1. Input and circular_buffer_size is set
958  2. Output and bitrate and circular_buffer_size is set
959  */
960 
961  if (is_output && s->bitrate && !s->circular_buffer_size) {
962  /* Warn user in case of 'circular_buffer_size' is not set */
963  av_log(h, AV_LOG_WARNING,"'bitrate' option was set but 'circular_buffer_size' is not, but required\n");
964  }
965 
966  if ((!is_output && s->circular_buffer_size) || (is_output && s->bitrate && s->circular_buffer_size)) {
967  int ret;
968 
969  /* start the task going */
971  ret = pthread_mutex_init(&s->mutex, NULL);
972  if (ret != 0) {
973  av_log(h, AV_LOG_ERROR, "pthread_mutex_init failed : %s\n", strerror(ret));
974  goto fail;
975  }
976  ret = pthread_cond_init(&s->cond, NULL);
977  if (ret != 0) {
978  av_log(h, AV_LOG_ERROR, "pthread_cond_init failed : %s\n", strerror(ret));
979  goto cond_fail;
980  }
981  ret = pthread_create(&s->circular_buffer_thread, NULL, is_output?circular_buffer_task_tx:circular_buffer_task_rx, h);
982  if (ret != 0) {
983  av_log(h, AV_LOG_ERROR, "pthread_create failed : %s\n", strerror(ret));
984  goto thread_fail;
985  }
986  s->thread_started = 1;
987  }
988 #endif
989 
990  return 0;
991 #if HAVE_PTHREAD_CANCEL
992  thread_fail:
993  pthread_cond_destroy(&s->cond);
994  cond_fail:
995  pthread_mutex_destroy(&s->mutex);
996 #endif
997  fail:
998  if (udp_fd >= 0)
999  closesocket(udp_fd);
1000  av_fifo_freep(&s->fifo);
1001  for (i = 0; i < num_include_sources; i++)
1002  av_freep(&include_sources[i]);
1003  for (i = 0; i < num_exclude_sources; i++)
1004  av_freep(&exclude_sources[i]);
1005  return AVERROR(EIO);
1006 }
1007 
1008 static int udplite_open(URLContext *h, const char *uri, int flags)
1009 {
1010  UDPContext *s = h->priv_data;
1011 
1012  // set default checksum coverage
1014 
1015  return udp_open(h, uri, flags);
1016 }
1017 
1018 static int udp_read(URLContext *h, uint8_t *buf, int size)
1019 {
1020  UDPContext *s = h->priv_data;
1021  int ret;
1022 #if HAVE_PTHREAD_CANCEL
1023  int avail, nonblock = h->flags & AVIO_FLAG_NONBLOCK;
1024 
1025  if (s->fifo) {
1026  pthread_mutex_lock(&s->mutex);
1027  do {
1028  avail = av_fifo_size(s->fifo);
1029  if (avail) { // >=size) {
1030  uint8_t tmp[4];
1031 
1032  av_fifo_generic_read(s->fifo, tmp, 4, NULL);
1033  avail= AV_RL32(tmp);
1034  if(avail > size){
1035  av_log(h, AV_LOG_WARNING, "Part of datagram lost due to insufficient buffer size\n");
1036  avail= size;
1037  }
1038 
1039  av_fifo_generic_read(s->fifo, buf, avail, NULL);
1040  av_fifo_drain(s->fifo, AV_RL32(tmp) - avail);
1041  pthread_mutex_unlock(&s->mutex);
1042  return avail;
1043  } else if(s->circular_buffer_error){
1044  int err = s->circular_buffer_error;
1045  pthread_mutex_unlock(&s->mutex);
1046  return err;
1047  } else if(nonblock) {
1048  pthread_mutex_unlock(&s->mutex);
1049  return AVERROR(EAGAIN);
1050  }
1051  else {
1052  /* FIXME: using the monotonic clock would be better,
1053  but it does not exist on all supported platforms. */
1054  int64_t t = av_gettime() + 100000;
1055  struct timespec tv = { .tv_sec = t / 1000000,
1056  .tv_nsec = (t % 1000000) * 1000 };
1057  if (pthread_cond_timedwait(&s->cond, &s->mutex, &tv) < 0) {
1058  pthread_mutex_unlock(&s->mutex);
1059  return AVERROR(errno == ETIMEDOUT ? EAGAIN : errno);
1060  }
1061  nonblock = 1;
1062  }
1063  } while( 1);
1064  }
1065 #endif
1066 
1067  if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
1068  ret = ff_network_wait_fd(s->udp_fd, 0);
1069  if (ret < 0)
1070  return ret;
1071  }
1072  ret = recv(s->udp_fd, buf, size, 0);
1073 
1074  return ret < 0 ? ff_neterrno() : ret;
1075 }
1076 
1077 static int udp_write(URLContext *h, const uint8_t *buf, int size)
1078 {
1079  UDPContext *s = h->priv_data;
1080  int ret;
1081 
1082 #if HAVE_PTHREAD_CANCEL
1083  if (s->fifo) {
1084  uint8_t tmp[4];
1085 
1086  pthread_mutex_lock(&s->mutex);
1087 
1088  /*
1089  Return error if last tx failed.
1090  Here we can't know on which packet error was, but it needs to know that error exists.
1091  */
1092  if (s->circular_buffer_error<0) {
1093  int err=s->circular_buffer_error;
1094  pthread_mutex_unlock(&s->mutex);
1095  return err;
1096  }
1097 
1098  if(av_fifo_space(s->fifo) < size + 4) {
1099  /* What about a partial packet tx ? */
1100  pthread_mutex_unlock(&s->mutex);
1101  return AVERROR(ENOMEM);
1102  }
1103  AV_WL32(tmp, size);
1104  av_fifo_generic_write(s->fifo, tmp, 4, NULL); /* size of packet */
1105  av_fifo_generic_write(s->fifo, (uint8_t *)buf, size, NULL); /* the data */
1106  pthread_cond_signal(&s->cond);
1107  pthread_mutex_unlock(&s->mutex);
1108  return size;
1109  }
1110 #endif
1111  if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
1112  ret = ff_network_wait_fd(s->udp_fd, 1);
1113  if (ret < 0)
1114  return ret;
1115  }
1116 
1117  if (!s->is_connected) {
1118  ret = sendto (s->udp_fd, buf, size, 0,
1119  (struct sockaddr *) &s->dest_addr,
1120  s->dest_addr_len);
1121  } else
1122  ret = send(s->udp_fd, buf, size, 0);
1123 
1124  return ret < 0 ? ff_neterrno() : ret;
1125 }
1126 
1127 static int udp_close(URLContext *h)
1128 {
1129  UDPContext *s = h->priv_data;
1130 
1131 #if HAVE_PTHREAD_CANCEL
1132  // Request close once writing is finished
1133  if (s->thread_started && !(h->flags & AVIO_FLAG_READ)) {
1134  pthread_mutex_lock(&s->mutex);
1135  s->close_req = 1;
1136  pthread_cond_signal(&s->cond);
1137  pthread_mutex_unlock(&s->mutex);
1138  }
1139 #endif
1140 
1141  if (s->is_multicast && (h->flags & AVIO_FLAG_READ))
1142  udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage);
1143 #if HAVE_PTHREAD_CANCEL
1144  if (s->thread_started) {
1145  int ret;
1146  // Cancel only read, as write has been signaled as success to the user
1147  if (h->flags & AVIO_FLAG_READ)
1148  pthread_cancel(s->circular_buffer_thread);
1149  ret = pthread_join(s->circular_buffer_thread, NULL);
1150  if (ret != 0)
1151  av_log(h, AV_LOG_ERROR, "pthread_join(): %s\n", strerror(ret));
1152  pthread_mutex_destroy(&s->mutex);
1153  pthread_cond_destroy(&s->cond);
1154  }
1155 #endif
1156  closesocket(s->udp_fd);
1157  av_fifo_freep(&s->fifo);
1158  return 0;
1159 }
1160 
1162  .name = "udp",
1163  .url_open = udp_open,
1164  .url_read = udp_read,
1165  .url_write = udp_write,
1166  .url_close = udp_close,
1167  .url_get_file_handle = udp_get_file_handle,
1168  .priv_data_size = sizeof(UDPContext),
1169  .priv_data_class = &udp_class,
1171 };
1172 
1174  .name = "udplite",
1175  .url_open = udplite_open,
1176  .url_read = udp_read,
1177  .url_write = udp_write,
1178  .url_close = udp_close,
1179  .url_get_file_handle = udp_get_file_handle,
1180  .priv_data_size = sizeof(UDPContext),
1181  .priv_data_class = &udplite_context_class,
1183 };
static int udp_open(URLContext *h, const char *uri, int flags)
Definition: udp.c:683
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:4461
#define NULL
Definition: coverity.c:32
static int udp_set_multicast_sources(URLContext *h, int sockfd, struct sockaddr *addr, int addr_len, char **sources, int nb_sources, int include)
Definition: udp.c:280
static const AVClass udplite_context_class
Definition: udp.c:150
const char * s
Definition: avisynth_c.h:768
static void log_net_error(void *ctx, int level, const char *prefix)
Definition: udp.c:157
static av_always_inline int pthread_mutex_destroy(pthread_mutex_t *mutex)
Definition: os2threads.h:106
#define URL_PROTOCOL_FLAG_NETWORK
Definition: url.h:34
#define NI_NUMERICSERV
Definition: network.h:193
#define HAVE_PTHREAD_CANCEL
Definition: udp.c:68
static av_always_inline int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
Definition: os2threads.h:164
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:1173
char * block
Definition: udp.c:115
int is_streamed
true if streamed (no seek possible), default = false
Definition: url.h:45
static int parse_source_list(char *buf, char **sources, int *num_sources, int max_sources)
Definition: udp.c:660
#define AVIO_FLAG_READ
read-only
Definition: avio.h:606
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:354
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:607
#define AI_PASSIVE
Definition: network.h:169
#define UDPLITE_SEND_CSCOV
Definition: udp.c:55
#define IPPROTO_UDPLITE
Definition: udp.c:60
int flags
Definition: url.h:43
int udplite_coverage
Definition: udp.c:84
#define freeaddrinfo
Definition: network.h:208
int av_usleep(unsigned usec)
Sleep for a period of time.
Definition: time.c:76
static av_always_inline int pthread_cond_destroy(pthread_cond_t *cond)
Definition: os2threads.h:138
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:166
int64_t bitrate
Definition: udp.c:100
static int16_t block[64]
Definition: dct.c:113
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:56
HMTX pthread_mutex_t
Definition: os2threads.h:49
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:481
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:88
static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr, struct sockaddr *local_addr)
Definition: udp.c:218
#define UDP_HEADER_SIZE
Definition: udp.c:78
static int udp_port(struct sockaddr_storage *addr, int addr_len)
Definition: udp.c:412
static int flags
Definition: log.c:57
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:705
static av_always_inline int pthread_cond_signal(pthread_cond_t *cond)
Definition: os2threads.h:146
ptrdiff_t size
Definition: opengl_enc.c:101
static int udp_close(URLContext *h)
Definition: udp.c:1127
#define av_log(a,...)
int circular_buffer_size
Definition: udp.c:97
#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:442
av_default_item_name
#define closesocket
Definition: ffserver.c:28
#define AVERROR(e)
Definition: error.h:43
#define E
Definition: udp.c:120
#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:90
#define UDP_TX_BUF_SIZE
Definition: udp.c:76
simple assert() macros that are a bit more flexible than ISO C assert().
#define D
Definition: udp.c:119
static struct addrinfo * udp_resolve_host(URLContext *h, const char *hostname, int port, int type, int family, int flags)
Definition: udp.c:250
int dest_addr_len
Definition: udp.c:93
static int max_delay(struct NCSofa *sofa)
Definition: af_sofalizer.c:507
static void error(const char *err)
int ff_is_multicast_address(struct sockaddr *addr)
Definition: network.c:131
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:84
int timeout
Definition: udp.c:112
#define OFFSET(x)
Definition: udp.c:118
char * localaddr
Definition: udp.c:111
int ai_addrlen
Definition: network.h:132
static const AVOption options[]
Definition: udp.c:121
uint8_t tmp[UDP_MAX_PKT_SIZE+4]
Definition: udp.c:109
#define ff_neterrno()
Definition: network.h:64
AVFormatContext * ctx
Definition: movenc.c:48
int overrun_nonfatal
Definition: udp.c:91
static av_always_inline int pthread_join(pthread_t thread, void **value_ptr)
Definition: os2threads.h:88
static av_always_inline int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)
Definition: os2threads.h:98
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:492
int is_connected
Definition: udp.c:94
struct sockaddr_storage local_addr_storage
Definition: udp.c:113
static pthread_mutex_t * mutex
Definition: w32pthreads.h:258
Definition: udp.c:80
int ff_socket_nonblock(int socket, int enable)
int64_t burst_bits
Definition: udp.c:101
#define FF_ARRAY_ELEMS(a)
int ttl
Definition: udp.c:83
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:74
#define IPV6_ADD_MEMBERSHIP
Definition: udp.c:72
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:267
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:625
int local_port
Definition: udp.c:89
int pkt_size
Definition: udp.c:86
#define IPV6_DROP_MEMBERSHIP
Definition: udp.c:73
a very simple circular buffer FIFO implementation
void * buf
Definition: avisynth_c.h:690
Definition: url.h:38
GLint GLenum type
Definition: opengl_enc.c:105
Describe the class of an AVClass context structure.
Definition: log.h:67
char * sources
Definition: udp.c:114
void * priv_data
Definition: url.h:41
#define gai_strerror
Definition: network.h:215
AVFifoBuffer * fifo
Definition: udp.c:98
#define snprintf
Definition: snprintf.h:34
misc parsing utilities
const char * name
Definition: url.h:54
int ai_socktype
Definition: network.h:130
int64_t av_gettime_relative(void)
Get the current time in microseconds since some unspecified starting point.
Definition: time.c:56
uint8_t level
Definition: svq3.c:207
int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
Put a description of the AVERROR code errnum in errbuf.
Definition: error.c:105
#define getaddrinfo
Definition: network.h:207
Main libavformat public API header.
int
struct sockaddr_storage dest_addr
Definition: udp.c:92
static int udp_read(URLContext *h, uint8_t *buf, int size)
Definition: udp.c:1018
int remaining_in_dg
Definition: udp.c:110
struct addrinfo * ai_next
Definition: network.h:135
static av_always_inline int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
Definition: os2threads.h:127
static int udp_set_multicast_ttl(int sockfd, int mcastTTL, struct sockaddr *addr)
Definition: udp.c:164
int udp_fd
Definition: udp.c:82
#define getnameinfo
Definition: network.h:209
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:1008
int len
static int udp_join_multicast_group(int sockfd, struct sockaddr *addr, struct sockaddr *local_addr)
Definition: udp.c:186
int circular_buffer_error
Definition: udp.c:99
static av_always_inline int pthread_mutex_unlock(pthread_mutex_t *mutex)
Definition: os2threads.h:120
static uint8_t tmp[8]
Definition: des.c:38
int close_req
Definition: udp.c:102
int buffer_size
Definition: udp.c:85
static int udp_socket_create(URLContext *h, struct sockaddr_storage *addr, socklen_t *addr_len, const char *localaddr)
Definition: udp.c:370
int is_multicast
Definition: udp.c:87
int ai_flags
Definition: network.h:128
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:143
#define UDP_MAX_PKT_SIZE
Definition: udp.c:77
#define av_freep(p)
int ff_network_wait_fd(int fd, int write)
Definition: network.c:73
unbuffered private I/O API
void av_fifo_freep(AVFifoBuffer **f)
Free an AVFifoBuffer and reset pointer to NULL.
Definition: fifo.c:63
static av_always_inline int pthread_mutex_lock(pthread_mutex_t *mutex)
Definition: os2threads.h:113
void av_fifo_drain(AVFifoBuffer *f, int size)
Discard data from the FIFO.
Definition: fifo.c:233
struct sockaddr * ai_addr
Definition: network.h:133
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
static int udp_write(URLContext *h, const uint8_t *buf, int size)
Definition: udp.c:1077
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
const URLProtocol ff_udp_protocol
Definition: udp.c:1161
int ai_family
Definition: network.h:129