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rtsp.c
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1 /*
2  * RTSP/SDP client
3  * Copyright (c) 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 #include "libavutil/avassert.h"
23 #include "libavutil/base64.h"
24 #include "libavutil/avstring.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/mathematics.h"
27 #include "libavutil/parseutils.h"
28 #include "libavutil/random_seed.h"
29 #include "libavutil/dict.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/time.h"
32 #include "avformat.h"
33 #include "avio_internal.h"
34 
35 #if HAVE_POLL_H
36 #include <poll.h>
37 #endif
38 #include "internal.h"
39 #include "network.h"
40 #include "os_support.h"
41 #include "http.h"
42 #include "rtsp.h"
43 
44 #include "rtpdec.h"
45 #include "rtpproto.h"
46 #include "rdt.h"
47 #include "rtpdec_formats.h"
48 #include "rtpenc_chain.h"
49 #include "url.h"
50 #include "rtpenc.h"
51 #include "mpegts.h"
52 
53 /* Timeout values for socket poll, in ms,
54  * and read_packet(), in seconds */
55 #define POLL_TIMEOUT_MS 100
56 #define READ_PACKET_TIMEOUT_S 10
57 #define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / POLL_TIMEOUT_MS
58 #define SDP_MAX_SIZE 16384
59 #define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
60 #define DEFAULT_REORDERING_DELAY 100000
61 
62 #define OFFSET(x) offsetof(RTSPState, x)
63 #define DEC AV_OPT_FLAG_DECODING_PARAM
64 #define ENC AV_OPT_FLAG_ENCODING_PARAM
65 
66 #define RTSP_FLAG_OPTS(name, longname) \
67  { name, longname, OFFSET(rtsp_flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC, "rtsp_flags" }, \
68  { "filter_src", "only receive packets from the negotiated peer IP", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_FILTER_SRC}, 0, 0, DEC, "rtsp_flags" }
69 
70 #define RTSP_MEDIATYPE_OPTS(name, longname) \
71  { name, longname, OFFSET(media_type_mask), AV_OPT_TYPE_FLAGS, { .i64 = (1 << (AVMEDIA_TYPE_DATA+1)) - 1 }, INT_MIN, INT_MAX, DEC, "allowed_media_types" }, \
72  { "video", "Video", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_VIDEO}, 0, 0, DEC, "allowed_media_types" }, \
73  { "audio", "Audio", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_AUDIO}, 0, 0, DEC, "allowed_media_types" }, \
74  { "data", "Data", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_DATA}, 0, 0, DEC, "allowed_media_types" }
75 
76 #define RTSP_REORDERING_OPTS() \
77  { "reorder_queue_size", "set number of packets to buffer for handling of reordered packets", OFFSET(reordering_queue_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, DEC }
78 
80  { "initial_pause", "do not start playing the stream immediately", OFFSET(initial_pause), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DEC },
81  FF_RTP_FLAG_OPTS(RTSPState, rtp_muxer_flags),
82  { "rtsp_transport", "set RTSP transport protocols", OFFSET(lower_transport_mask), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC|ENC, "rtsp_transport" }, \
83  { "udp", "UDP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
84  { "tcp", "TCP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_TCP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
85  { "udp_multicast", "UDP multicast", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP_MULTICAST}, 0, 0, DEC, "rtsp_transport" },
86  { "http", "HTTP tunneling", 0, AV_OPT_TYPE_CONST, {.i64 = (1 << RTSP_LOWER_TRANSPORT_HTTP)}, 0, 0, DEC, "rtsp_transport" },
87  RTSP_FLAG_OPTS("rtsp_flags", "set RTSP flags"),
88  { "listen", "wait for incoming connections", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_LISTEN}, 0, 0, DEC, "rtsp_flags" },
89  { "prefer_tcp", "try RTP via TCP first, if available", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_PREFER_TCP}, 0, 0, DEC|ENC, "rtsp_flags" },
90  RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"),
91  { "min_port", "set minimum local UDP port", OFFSET(rtp_port_min), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MIN}, 0, 65535, DEC|ENC },
92  { "max_port", "set maximum local UDP port", OFFSET(rtp_port_max), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MAX}, 0, 65535, DEC|ENC },
93  { "timeout", "set maximum timeout (in seconds) to wait for incoming connections (-1 is infinite, imply flag listen)", OFFSET(initial_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, DEC },
94  { "stimeout", "set timeout (in microseconds) of socket TCP I/O operations", OFFSET(stimeout), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, DEC },
96  { "user-agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = LIBAVFORMAT_IDENT}, 0, 0, DEC },
97  { NULL },
98 };
99 
100 static const AVOption sdp_options[] = {
101  RTSP_FLAG_OPTS("sdp_flags", "SDP flags"),
102  { "custom_io", "use custom I/O", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_CUSTOM_IO}, 0, 0, DEC, "rtsp_flags" },
103  { "rtcp_to_source", "send RTCP packets to the source address of received packets", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_RTCP_TO_SOURCE}, 0, 0, DEC, "rtsp_flags" },
104  RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"),
106  { NULL },
107 };
108 
109 static const AVOption rtp_options[] = {
110  RTSP_FLAG_OPTS("rtp_flags", "set RTP flags"),
112  { NULL },
113 };
114 
115 static void get_word_until_chars(char *buf, int buf_size,
116  const char *sep, const char **pp)
117 {
118  const char *p;
119  char *q;
120 
121  p = *pp;
122  p += strspn(p, SPACE_CHARS);
123  q = buf;
124  while (!strchr(sep, *p) && *p != '\0') {
125  if ((q - buf) < buf_size - 1)
126  *q++ = *p;
127  p++;
128  }
129  if (buf_size > 0)
130  *q = '\0';
131  *pp = p;
132 }
133 
134 static void get_word_sep(char *buf, int buf_size, const char *sep,
135  const char **pp)
136 {
137  if (**pp == '/') (*pp)++;
138  get_word_until_chars(buf, buf_size, sep, pp);
139 }
140 
141 static void get_word(char *buf, int buf_size, const char **pp)
142 {
143  get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
144 }
145 
146 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
147  * and end time.
148  * Used for seeking in the rtp stream.
149  */
150 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
151 {
152  char buf[256];
153 
154  p += strspn(p, SPACE_CHARS);
155  if (!av_stristart(p, "npt=", &p))
156  return;
157 
158  *start = AV_NOPTS_VALUE;
159  *end = AV_NOPTS_VALUE;
160 
161  get_word_sep(buf, sizeof(buf), "-", &p);
162  av_parse_time(start, buf, 1);
163  if (*p == '-') {
164  p++;
165  get_word_sep(buf, sizeof(buf), "-", &p);
166  av_parse_time(end, buf, 1);
167  }
168 }
169 
170 static int get_sockaddr(const char *buf, struct sockaddr_storage *sock)
171 {
172  struct addrinfo hints = { 0 }, *ai = NULL;
173  hints.ai_flags = AI_NUMERICHOST;
174  if (getaddrinfo(buf, NULL, &hints, &ai))
175  return -1;
176  memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
177  freeaddrinfo(ai);
178  return 0;
179 }
180 
181 #if CONFIG_RTPDEC
182 static void init_rtp_handler(RTPDynamicProtocolHandler *handler,
183  RTSPStream *rtsp_st, AVCodecContext *codec)
184 {
185  if (!handler)
186  return;
187  if (codec)
188  codec->codec_id = handler->codec_id;
189  rtsp_st->dynamic_handler = handler;
190  if (handler->alloc) {
191  rtsp_st->dynamic_protocol_context = handler->alloc();
192  if (!rtsp_st->dynamic_protocol_context)
193  rtsp_st->dynamic_handler = NULL;
194  }
195 }
196 
197 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
198 static int sdp_parse_rtpmap(AVFormatContext *s,
199  AVStream *st, RTSPStream *rtsp_st,
200  int payload_type, const char *p)
201 {
202  AVCodecContext *codec = st->codec;
203  char buf[256];
204  int i;
205  AVCodec *c;
206  const char *c_name;
207 
208  /* See if we can handle this kind of payload.
209  * The space should normally not be there but some Real streams or
210  * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
211  * have a trailing space. */
212  get_word_sep(buf, sizeof(buf), "/ ", &p);
213  if (payload_type < RTP_PT_PRIVATE) {
214  /* We are in a standard case
215  * (from http://www.iana.org/assignments/rtp-parameters). */
216  codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
217  }
218 
219  if (codec->codec_id == AV_CODEC_ID_NONE) {
220  RTPDynamicProtocolHandler *handler =
222  init_rtp_handler(handler, rtsp_st, codec);
223  /* If no dynamic handler was found, check with the list of standard
224  * allocated types, if such a stream for some reason happens to
225  * use a private payload type. This isn't handled in rtpdec.c, since
226  * the format name from the rtpmap line never is passed into rtpdec. */
227  if (!rtsp_st->dynamic_handler)
228  codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
229  }
230 
231  c = avcodec_find_decoder(codec->codec_id);
232  if (c && c->name)
233  c_name = c->name;
234  else
235  c_name = "(null)";
236 
237  get_word_sep(buf, sizeof(buf), "/", &p);
238  i = atoi(buf);
239  switch (codec->codec_type) {
240  case AVMEDIA_TYPE_AUDIO:
241  av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
244  if (i > 0) {
245  codec->sample_rate = i;
246  avpriv_set_pts_info(st, 32, 1, codec->sample_rate);
247  get_word_sep(buf, sizeof(buf), "/", &p);
248  i = atoi(buf);
249  if (i > 0)
250  codec->channels = i;
251  }
252  av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
253  codec->sample_rate);
254  av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
255  codec->channels);
256  break;
257  case AVMEDIA_TYPE_VIDEO:
258  av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
259  if (i > 0)
260  avpriv_set_pts_info(st, 32, 1, i);
261  break;
262  default:
263  break;
264  }
265  if (rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->init)
266  rtsp_st->dynamic_handler->init(s, st->index,
267  rtsp_st->dynamic_protocol_context);
268  return 0;
269 }
270 
271 /* parse the attribute line from the fmtp a line of an sdp response. This
272  * is broken out as a function because it is used in rtp_h264.c, which is
273  * forthcoming. */
274 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
275  char *value, int value_size)
276 {
277  *p += strspn(*p, SPACE_CHARS);
278  if (**p) {
279  get_word_sep(attr, attr_size, "=", p);
280  if (**p == '=')
281  (*p)++;
282  get_word_sep(value, value_size, ";", p);
283  if (**p == ';')
284  (*p)++;
285  return 1;
286  }
287  return 0;
288 }
289 
290 typedef struct SDPParseState {
291  /* SDP only */
292  struct sockaddr_storage default_ip;
293  int default_ttl;
294  int skip_media; ///< set if an unknown m= line occurs
295  int nb_default_include_source_addrs; /**< Number of source-specific multicast include source IP address (from SDP content) */
296  struct RTSPSource **default_include_source_addrs; /**< Source-specific multicast include source IP address (from SDP content) */
297  int nb_default_exclude_source_addrs; /**< Number of source-specific multicast exclude source IP address (from SDP content) */
298  struct RTSPSource **default_exclude_source_addrs; /**< Source-specific multicast exclude source IP address (from SDP content) */
299  int seen_rtpmap;
300  int seen_fmtp;
301  char delayed_fmtp[2048];
302 } SDPParseState;
303 
304 static void copy_default_source_addrs(struct RTSPSource **addrs, int count,
305  struct RTSPSource ***dest, int *dest_count)
306 {
307  RTSPSource *rtsp_src, *rtsp_src2;
308  int i;
309  for (i = 0; i < count; i++) {
310  rtsp_src = addrs[i];
311  rtsp_src2 = av_malloc(sizeof(*rtsp_src2));
312  if (!rtsp_src2)
313  continue;
314  memcpy(rtsp_src2, rtsp_src, sizeof(*rtsp_src));
315  dynarray_add(dest, dest_count, rtsp_src2);
316  }
317 }
318 
319 static void parse_fmtp(AVFormatContext *s, RTSPState *rt,
320  int payload_type, const char *line)
321 {
322  int i;
323 
324  for (i = 0; i < rt->nb_rtsp_streams; i++) {
325  RTSPStream *rtsp_st = rt->rtsp_streams[i];
326  if (rtsp_st->sdp_payload_type == payload_type &&
327  rtsp_st->dynamic_handler &&
328  rtsp_st->dynamic_handler->parse_sdp_a_line) {
329  rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
330  rtsp_st->dynamic_protocol_context, line);
331  }
332  }
333 }
334 
335 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
336  int letter, const char *buf)
337 {
338  RTSPState *rt = s->priv_data;
339  char buf1[64], st_type[64];
340  const char *p;
341  enum AVMediaType codec_type;
342  int payload_type;
343  AVStream *st;
344  RTSPStream *rtsp_st;
345  RTSPSource *rtsp_src;
346  struct sockaddr_storage sdp_ip;
347  int ttl;
348 
349  av_dlog(s, "sdp: %c='%s'\n", letter, buf);
350 
351  p = buf;
352  if (s1->skip_media && letter != 'm')
353  return;
354  switch (letter) {
355  case 'c':
356  get_word(buf1, sizeof(buf1), &p);
357  if (strcmp(buf1, "IN") != 0)
358  return;
359  get_word(buf1, sizeof(buf1), &p);
360  if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
361  return;
362  get_word_sep(buf1, sizeof(buf1), "/", &p);
363  if (get_sockaddr(buf1, &sdp_ip))
364  return;
365  ttl = 16;
366  if (*p == '/') {
367  p++;
368  get_word_sep(buf1, sizeof(buf1), "/", &p);
369  ttl = atoi(buf1);
370  }
371  if (s->nb_streams == 0) {
372  s1->default_ip = sdp_ip;
373  s1->default_ttl = ttl;
374  } else {
375  rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
376  rtsp_st->sdp_ip = sdp_ip;
377  rtsp_st->sdp_ttl = ttl;
378  }
379  break;
380  case 's':
381  av_dict_set(&s->metadata, "title", p, 0);
382  break;
383  case 'i':
384  if (s->nb_streams == 0) {
385  av_dict_set(&s->metadata, "comment", p, 0);
386  break;
387  }
388  break;
389  case 'm':
390  /* new stream */
391  s1->skip_media = 0;
392  s1->seen_fmtp = 0;
393  s1->seen_rtpmap = 0;
394  codec_type = AVMEDIA_TYPE_UNKNOWN;
395  get_word(st_type, sizeof(st_type), &p);
396  if (!strcmp(st_type, "audio")) {
397  codec_type = AVMEDIA_TYPE_AUDIO;
398  } else if (!strcmp(st_type, "video")) {
399  codec_type = AVMEDIA_TYPE_VIDEO;
400  } else if (!strcmp(st_type, "application")) {
401  codec_type = AVMEDIA_TYPE_DATA;
402  }
403  if (codec_type == AVMEDIA_TYPE_UNKNOWN || !(rt->media_type_mask & (1 << codec_type))) {
404  s1->skip_media = 1;
405  return;
406  }
407  rtsp_st = av_mallocz(sizeof(RTSPStream));
408  if (!rtsp_st)
409  return;
410  rtsp_st->stream_index = -1;
411  dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
412 
413  rtsp_st->sdp_ip = s1->default_ip;
414  rtsp_st->sdp_ttl = s1->default_ttl;
415 
416  copy_default_source_addrs(s1->default_include_source_addrs,
417  s1->nb_default_include_source_addrs,
418  &rtsp_st->include_source_addrs,
419  &rtsp_st->nb_include_source_addrs);
420  copy_default_source_addrs(s1->default_exclude_source_addrs,
421  s1->nb_default_exclude_source_addrs,
422  &rtsp_st->exclude_source_addrs,
423  &rtsp_st->nb_exclude_source_addrs);
424 
425  get_word(buf1, sizeof(buf1), &p); /* port */
426  rtsp_st->sdp_port = atoi(buf1);
427 
428  get_word(buf1, sizeof(buf1), &p); /* protocol */
429  if (!strcmp(buf1, "udp"))
431  else if (strstr(buf1, "/AVPF") || strstr(buf1, "/SAVPF"))
432  rtsp_st->feedback = 1;
433 
434  /* XXX: handle list of formats */
435  get_word(buf1, sizeof(buf1), &p); /* format list */
436  rtsp_st->sdp_payload_type = atoi(buf1);
437 
438  if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
439  /* no corresponding stream */
440  if (rt->transport == RTSP_TRANSPORT_RAW) {
441  if (!rt->ts && CONFIG_RTPDEC)
442  rt->ts = avpriv_mpegts_parse_open(s);
443  } else {
445  handler = ff_rtp_handler_find_by_id(
447  init_rtp_handler(handler, rtsp_st, NULL);
448  if (handler && handler->init)
449  handler->init(s, -1, rtsp_st->dynamic_protocol_context);
450  }
451  } else if (rt->server_type == RTSP_SERVER_WMS &&
452  codec_type == AVMEDIA_TYPE_DATA) {
453  /* RTX stream, a stream that carries all the other actual
454  * audio/video streams. Don't expose this to the callers. */
455  } else {
456  st = avformat_new_stream(s, NULL);
457  if (!st)
458  return;
459  st->id = rt->nb_rtsp_streams - 1;
460  rtsp_st->stream_index = st->index;
461  st->codec->codec_type = codec_type;
462  if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
464  /* if standard payload type, we can find the codec right now */
466  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
467  st->codec->sample_rate > 0)
468  avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate);
469  /* Even static payload types may need a custom depacketizer */
470  handler = ff_rtp_handler_find_by_id(
471  rtsp_st->sdp_payload_type, st->codec->codec_type);
472  init_rtp_handler(handler, rtsp_st, st->codec);
473  if (handler && handler->init)
474  handler->init(s, st->index,
475  rtsp_st->dynamic_protocol_context);
476  }
477  }
478  /* put a default control url */
479  av_strlcpy(rtsp_st->control_url, rt->control_uri,
480  sizeof(rtsp_st->control_url));
481  break;
482  case 'a':
483  if (av_strstart(p, "control:", &p)) {
484  if (s->nb_streams == 0) {
485  if (!strncmp(p, "rtsp://", 7))
486  av_strlcpy(rt->control_uri, p,
487  sizeof(rt->control_uri));
488  } else {
489  char proto[32];
490  /* get the control url */
491  rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
492 
493  /* XXX: may need to add full url resolution */
494  av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
495  NULL, NULL, 0, p);
496  if (proto[0] == '\0') {
497  /* relative control URL */
498  if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
499  av_strlcat(rtsp_st->control_url, "/",
500  sizeof(rtsp_st->control_url));
501  av_strlcat(rtsp_st->control_url, p,
502  sizeof(rtsp_st->control_url));
503  } else
504  av_strlcpy(rtsp_st->control_url, p,
505  sizeof(rtsp_st->control_url));
506  }
507  } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
508  /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
509  get_word(buf1, sizeof(buf1), &p);
510  payload_type = atoi(buf1);
511  rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
512  if (rtsp_st->stream_index >= 0) {
513  st = s->streams[rtsp_st->stream_index];
514  sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
515  }
516  s1->seen_rtpmap = 1;
517  if (s1->seen_fmtp) {
518  parse_fmtp(s, rt, payload_type, s1->delayed_fmtp);
519  }
520  } else if (av_strstart(p, "fmtp:", &p) ||
521  av_strstart(p, "framesize:", &p)) {
522  // let dynamic protocol handlers have a stab at the line.
523  get_word(buf1, sizeof(buf1), &p);
524  payload_type = atoi(buf1);
525  if (s1->seen_rtpmap) {
526  parse_fmtp(s, rt, payload_type, buf);
527  } else {
528  s1->seen_fmtp = 1;
529  av_strlcpy(s1->delayed_fmtp, buf, sizeof(s1->delayed_fmtp));
530  }
531  } else if (av_strstart(p, "range:", &p)) {
532  int64_t start, end;
533 
534  // this is so that seeking on a streamed file can work.
535  rtsp_parse_range_npt(p, &start, &end);
536  s->start_time = start;
537  /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
538  s->duration = (end == AV_NOPTS_VALUE) ?
539  AV_NOPTS_VALUE : end - start;
540  } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
541  if (atoi(p) == 1)
543  } else if (av_strstart(p, "SampleRate:integer;", &p) &&
544  s->nb_streams > 0) {
545  st = s->streams[s->nb_streams - 1];
546  st->codec->sample_rate = atoi(p);
547  } else if (av_strstart(p, "crypto:", &p) && s->nb_streams > 0) {
548  // RFC 4568
549  rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
550  get_word(buf1, sizeof(buf1), &p); // ignore tag
551  get_word(rtsp_st->crypto_suite, sizeof(rtsp_st->crypto_suite), &p);
552  p += strspn(p, SPACE_CHARS);
553  if (av_strstart(p, "inline:", &p))
554  get_word(rtsp_st->crypto_params, sizeof(rtsp_st->crypto_params), &p);
555  } else if (av_strstart(p, "source-filter:", &p)) {
556  int exclude = 0;
557  get_word(buf1, sizeof(buf1), &p);
558  if (strcmp(buf1, "incl") && strcmp(buf1, "excl"))
559  return;
560  exclude = !strcmp(buf1, "excl");
561 
562  get_word(buf1, sizeof(buf1), &p);
563  if (strcmp(buf1, "IN") != 0)
564  return;
565  get_word(buf1, sizeof(buf1), &p);
566  if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6") && strcmp(buf1, "*"))
567  return;
568  // not checking that the destination address actually matches or is wildcard
569  get_word(buf1, sizeof(buf1), &p);
570 
571  while (*p != '\0') {
572  rtsp_src = av_mallocz(sizeof(*rtsp_src));
573  if (!rtsp_src)
574  return;
575  get_word(rtsp_src->addr, sizeof(rtsp_src->addr), &p);
576  if (exclude) {
577  if (s->nb_streams == 0) {
578  dynarray_add(&s1->default_exclude_source_addrs, &s1->nb_default_exclude_source_addrs, rtsp_src);
579  } else {
580  rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
581  dynarray_add(&rtsp_st->exclude_source_addrs, &rtsp_st->nb_exclude_source_addrs, rtsp_src);
582  }
583  } else {
584  if (s->nb_streams == 0) {
585  dynarray_add(&s1->default_include_source_addrs, &s1->nb_default_include_source_addrs, rtsp_src);
586  } else {
587  rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
588  dynarray_add(&rtsp_st->include_source_addrs, &rtsp_st->nb_include_source_addrs, rtsp_src);
589  }
590  }
591  }
592  } else {
593  if (rt->server_type == RTSP_SERVER_WMS)
595  if (s->nb_streams > 0) {
596  rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
597 
598  if (rt->server_type == RTSP_SERVER_REAL)
599  ff_real_parse_sdp_a_line(s, rtsp_st->stream_index, p);
600 
601  if (rtsp_st->dynamic_handler &&
603  rtsp_st->dynamic_handler->parse_sdp_a_line(s,
604  rtsp_st->stream_index,
605  rtsp_st->dynamic_protocol_context, buf);
606  }
607  }
608  break;
609  }
610 }
611 
612 int ff_sdp_parse(AVFormatContext *s, const char *content)
613 {
614  RTSPState *rt = s->priv_data;
615  const char *p;
616  int letter, i;
617  /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
618  * contain long SDP lines containing complete ASF Headers (several
619  * kB) or arrays of MDPR (RM stream descriptor) headers plus
620  * "rulebooks" describing their properties. Therefore, the SDP line
621  * buffer is large.
622  *
623  * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
624  * in rtpdec_xiph.c. */
625  char buf[16384], *q;
626  SDPParseState sdp_parse_state = { { 0 } }, *s1 = &sdp_parse_state;
627 
628  p = content;
629  for (;;) {
630  p += strspn(p, SPACE_CHARS);
631  letter = *p;
632  if (letter == '\0')
633  break;
634  p++;
635  if (*p != '=')
636  goto next_line;
637  p++;
638  /* get the content */
639  q = buf;
640  while (*p != '\n' && *p != '\r' && *p != '\0') {
641  if ((q - buf) < sizeof(buf) - 1)
642  *q++ = *p;
643  p++;
644  }
645  *q = '\0';
646  sdp_parse_line(s, s1, letter, buf);
647  next_line:
648  while (*p != '\n' && *p != '\0')
649  p++;
650  if (*p == '\n')
651  p++;
652  }
653 
654  for (i = 0; i < s1->nb_default_include_source_addrs; i++)
655  av_free(s1->default_include_source_addrs[i]);
656  av_freep(&s1->default_include_source_addrs);
657  for (i = 0; i < s1->nb_default_exclude_source_addrs; i++)
658  av_free(s1->default_exclude_source_addrs[i]);
659  av_freep(&s1->default_exclude_source_addrs);
660 
661  rt->p = av_malloc_array(rt->nb_rtsp_streams + 1, sizeof(struct pollfd) * 2);
662  if (!rt->p) return AVERROR(ENOMEM);
663  return 0;
664 }
665 #endif /* CONFIG_RTPDEC */
666 
667 void ff_rtsp_undo_setup(AVFormatContext *s, int send_packets)
668 {
669  RTSPState *rt = s->priv_data;
670  int i;
671 
672  for (i = 0; i < rt->nb_rtsp_streams; i++) {
673  RTSPStream *rtsp_st = rt->rtsp_streams[i];
674  if (!rtsp_st)
675  continue;
676  if (rtsp_st->transport_priv) {
677  if (s->oformat) {
678  AVFormatContext *rtpctx = rtsp_st->transport_priv;
679  av_write_trailer(rtpctx);
681  uint8_t *ptr;
682  if (CONFIG_RTSP_MUXER && rtpctx->pb && send_packets)
683  ff_rtsp_tcp_write_packet(s, rtsp_st);
684  avio_close_dyn_buf(rtpctx->pb, &ptr);
685  av_free(ptr);
686  } else {
687  avio_close(rtpctx->pb);
688  }
689  avformat_free_context(rtpctx);
690  } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
692  else if (rt->transport == RTSP_TRANSPORT_RTP && CONFIG_RTPDEC)
694  }
695  rtsp_st->transport_priv = NULL;
696  if (rtsp_st->rtp_handle)
697  ffurl_close(rtsp_st->rtp_handle);
698  rtsp_st->rtp_handle = NULL;
699  }
700 }
701 
702 /* close and free RTSP streams */
704 {
705  RTSPState *rt = s->priv_data;
706  int i, j;
707  RTSPStream *rtsp_st;
708 
709  ff_rtsp_undo_setup(s, 0);
710  for (i = 0; i < rt->nb_rtsp_streams; i++) {
711  rtsp_st = rt->rtsp_streams[i];
712  if (rtsp_st) {
713  if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
714  rtsp_st->dynamic_handler->free(
715  rtsp_st->dynamic_protocol_context);
716  for (j = 0; j < rtsp_st->nb_include_source_addrs; j++)
717  av_free(rtsp_st->include_source_addrs[j]);
718  av_freep(&rtsp_st->include_source_addrs);
719  for (j = 0; j < rtsp_st->nb_exclude_source_addrs; j++)
720  av_free(rtsp_st->exclude_source_addrs[j]);
721  av_freep(&rtsp_st->exclude_source_addrs);
722 
723  av_free(rtsp_st);
724  }
725  }
726  av_free(rt->rtsp_streams);
727  if (rt->asf_ctx) {
729  }
730  if (rt->ts && CONFIG_RTPDEC)
732  av_free(rt->p);
733  av_free(rt->recvbuf);
734 }
735 
737 {
738  RTSPState *rt = s->priv_data;
739  AVStream *st = NULL;
740  int reordering_queue_size = rt->reordering_queue_size;
741  if (reordering_queue_size < 0) {
743  reordering_queue_size = 0;
744  else
745  reordering_queue_size = RTP_REORDER_QUEUE_DEFAULT_SIZE;
746  }
747 
748  /* open the RTP context */
749  if (rtsp_st->stream_index >= 0)
750  st = s->streams[rtsp_st->stream_index];
751  if (!st)
753 
754  if (s->oformat && CONFIG_RTSP_MUXER) {
756  s, st, rtsp_st->rtp_handle,
758  rtsp_st->stream_index);
759  /* Ownership of rtp_handle is passed to the rtp mux context */
760  rtsp_st->rtp_handle = NULL;
761  if (ret < 0)
762  return ret;
763  st->time_base = ((AVFormatContext*)rtsp_st->transport_priv)->streams[0]->time_base;
764  } else if (rt->transport == RTSP_TRANSPORT_RAW) {
765  return 0; // Don't need to open any parser here
766  } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
767  rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
768  rtsp_st->dynamic_protocol_context,
769  rtsp_st->dynamic_handler);
770  else if (CONFIG_RTPDEC)
771  rtsp_st->transport_priv = ff_rtp_parse_open(s, st,
772  rtsp_st->sdp_payload_type,
773  reordering_queue_size);
774 
775  if (!rtsp_st->transport_priv) {
776  return AVERROR(ENOMEM);
777  } else if (rt->transport == RTSP_TRANSPORT_RTP && CONFIG_RTPDEC) {
778  if (rtsp_st->dynamic_handler) {
780  rtsp_st->dynamic_protocol_context,
781  rtsp_st->dynamic_handler);
782  }
783  if (rtsp_st->crypto_suite[0])
785  rtsp_st->crypto_suite,
786  rtsp_st->crypto_params);
787  }
788 
789  return 0;
790 }
791 
792 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
793 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
794 {
795  const char *q;
796  char *p;
797  int v;
798 
799  q = *pp;
800  q += strspn(q, SPACE_CHARS);
801  v = strtol(q, &p, 10);
802  if (*p == '-') {
803  p++;
804  *min_ptr = v;
805  v = strtol(p, &p, 10);
806  *max_ptr = v;
807  } else {
808  *min_ptr = v;
809  *max_ptr = v;
810  }
811  *pp = p;
812 }
813 
814 /* XXX: only one transport specification is parsed */
815 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
816 {
817  char transport_protocol[16];
818  char profile[16];
819  char lower_transport[16];
820  char parameter[16];
822  char buf[256];
823 
824  reply->nb_transports = 0;
825 
826  for (;;) {
827  p += strspn(p, SPACE_CHARS);
828  if (*p == '\0')
829  break;
830 
831  th = &reply->transports[reply->nb_transports];
832 
833  get_word_sep(transport_protocol, sizeof(transport_protocol),
834  "/", &p);
835  if (!av_strcasecmp (transport_protocol, "rtp")) {
836  get_word_sep(profile, sizeof(profile), "/;,", &p);
837  lower_transport[0] = '\0';
838  /* rtp/avp/<protocol> */
839  if (*p == '/') {
840  get_word_sep(lower_transport, sizeof(lower_transport),
841  ";,", &p);
842  }
844  } else if (!av_strcasecmp (transport_protocol, "x-pn-tng") ||
845  !av_strcasecmp (transport_protocol, "x-real-rdt")) {
846  /* x-pn-tng/<protocol> */
847  get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
848  profile[0] = '\0';
850  } else if (!av_strcasecmp(transport_protocol, "raw")) {
851  get_word_sep(profile, sizeof(profile), "/;,", &p);
852  lower_transport[0] = '\0';
853  /* raw/raw/<protocol> */
854  if (*p == '/') {
855  get_word_sep(lower_transport, sizeof(lower_transport),
856  ";,", &p);
857  }
859  }
860  if (!av_strcasecmp(lower_transport, "TCP"))
862  else
864 
865  if (*p == ';')
866  p++;
867  /* get each parameter */
868  while (*p != '\0' && *p != ',') {
869  get_word_sep(parameter, sizeof(parameter), "=;,", &p);
870  if (!strcmp(parameter, "port")) {
871  if (*p == '=') {
872  p++;
873  rtsp_parse_range(&th->port_min, &th->port_max, &p);
874  }
875  } else if (!strcmp(parameter, "client_port")) {
876  if (*p == '=') {
877  p++;
878  rtsp_parse_range(&th->client_port_min,
879  &th->client_port_max, &p);
880  }
881  } else if (!strcmp(parameter, "server_port")) {
882  if (*p == '=') {
883  p++;
884  rtsp_parse_range(&th->server_port_min,
885  &th->server_port_max, &p);
886  }
887  } else if (!strcmp(parameter, "interleaved")) {
888  if (*p == '=') {
889  p++;
890  rtsp_parse_range(&th->interleaved_min,
891  &th->interleaved_max, &p);
892  }
893  } else if (!strcmp(parameter, "multicast")) {
896  } else if (!strcmp(parameter, "ttl")) {
897  if (*p == '=') {
898  char *end;
899  p++;
900  th->ttl = strtol(p, &end, 10);
901  p = end;
902  }
903  } else if (!strcmp(parameter, "destination")) {
904  if (*p == '=') {
905  p++;
906  get_word_sep(buf, sizeof(buf), ";,", &p);
907  get_sockaddr(buf, &th->destination);
908  }
909  } else if (!strcmp(parameter, "source")) {
910  if (*p == '=') {
911  p++;
912  get_word_sep(buf, sizeof(buf), ";,", &p);
913  av_strlcpy(th->source, buf, sizeof(th->source));
914  }
915  } else if (!strcmp(parameter, "mode")) {
916  if (*p == '=') {
917  p++;
918  get_word_sep(buf, sizeof(buf), ";, ", &p);
919  if (!strcmp(buf, "record") ||
920  !strcmp(buf, "receive"))
921  th->mode_record = 1;
922  }
923  }
924 
925  while (*p != ';' && *p != '\0' && *p != ',')
926  p++;
927  if (*p == ';')
928  p++;
929  }
930  if (*p == ',')
931  p++;
932 
933  reply->nb_transports++;
934  }
935 }
936 
937 static void handle_rtp_info(RTSPState *rt, const char *url,
938  uint32_t seq, uint32_t rtptime)
939 {
940  int i;
941  if (!rtptime || !url[0])
942  return;
943  if (rt->transport != RTSP_TRANSPORT_RTP)
944  return;
945  for (i = 0; i < rt->nb_rtsp_streams; i++) {
946  RTSPStream *rtsp_st = rt->rtsp_streams[i];
947  RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
948  if (!rtpctx)
949  continue;
950  if (!strcmp(rtsp_st->control_url, url)) {
951  rtpctx->base_timestamp = rtptime;
952  break;
953  }
954  }
955 }
956 
957 static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
958 {
959  int read = 0;
960  char key[20], value[1024], url[1024] = "";
961  uint32_t seq = 0, rtptime = 0;
962 
963  for (;;) {
964  p += strspn(p, SPACE_CHARS);
965  if (!*p)
966  break;
967  get_word_sep(key, sizeof(key), "=", &p);
968  if (*p != '=')
969  break;
970  p++;
971  get_word_sep(value, sizeof(value), ";, ", &p);
972  read++;
973  if (!strcmp(key, "url"))
974  av_strlcpy(url, value, sizeof(url));
975  else if (!strcmp(key, "seq"))
976  seq = strtoul(value, NULL, 10);
977  else if (!strcmp(key, "rtptime"))
978  rtptime = strtoul(value, NULL, 10);
979  if (*p == ',') {
980  handle_rtp_info(rt, url, seq, rtptime);
981  url[0] = '\0';
982  seq = rtptime = 0;
983  read = 0;
984  }
985  if (*p)
986  p++;
987  }
988  if (read > 0)
989  handle_rtp_info(rt, url, seq, rtptime);
990 }
991 
992 void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
993  RTSPState *rt, const char *method)
994 {
995  const char *p;
996 
997  /* NOTE: we do case independent match for broken servers */
998  p = buf;
999  if (av_stristart(p, "Session:", &p)) {
1000  int t;
1001  get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
1002  if (av_stristart(p, ";timeout=", &p) &&
1003  (t = strtol(p, NULL, 10)) > 0) {
1004  reply->timeout = t;
1005  }
1006  } else if (av_stristart(p, "Content-Length:", &p)) {
1007  reply->content_length = strtol(p, NULL, 10);
1008  } else if (av_stristart(p, "Transport:", &p)) {
1009  rtsp_parse_transport(reply, p);
1010  } else if (av_stristart(p, "CSeq:", &p)) {
1011  reply->seq = strtol(p, NULL, 10);
1012  } else if (av_stristart(p, "Range:", &p)) {
1013  rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
1014  } else if (av_stristart(p, "RealChallenge1:", &p)) {
1015  p += strspn(p, SPACE_CHARS);
1016  av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
1017  } else if (av_stristart(p, "Server:", &p)) {
1018  p += strspn(p, SPACE_CHARS);
1019  av_strlcpy(reply->server, p, sizeof(reply->server));
1020  } else if (av_stristart(p, "Notice:", &p) ||
1021  av_stristart(p, "X-Notice:", &p)) {
1022  reply->notice = strtol(p, NULL, 10);
1023  } else if (av_stristart(p, "Location:", &p)) {
1024  p += strspn(p, SPACE_CHARS);
1025  av_strlcpy(reply->location, p , sizeof(reply->location));
1026  } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
1027  p += strspn(p, SPACE_CHARS);
1028  ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
1029  } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
1030  p += strspn(p, SPACE_CHARS);
1031  ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
1032  } else if (av_stristart(p, "Content-Base:", &p) && rt) {
1033  p += strspn(p, SPACE_CHARS);
1034  if (method && !strcmp(method, "DESCRIBE"))
1035  av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
1036  } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
1037  p += strspn(p, SPACE_CHARS);
1038  if (method && !strcmp(method, "PLAY"))
1039  rtsp_parse_rtp_info(rt, p);
1040  } else if (av_stristart(p, "Public:", &p) && rt) {
1041  if (strstr(p, "GET_PARAMETER") &&
1042  method && !strcmp(method, "OPTIONS"))
1043  rt->get_parameter_supported = 1;
1044  } else if (av_stristart(p, "x-Accept-Dynamic-Rate:", &p) && rt) {
1045  p += strspn(p, SPACE_CHARS);
1046  rt->accept_dynamic_rate = atoi(p);
1047  } else if (av_stristart(p, "Content-Type:", &p)) {
1048  p += strspn(p, SPACE_CHARS);
1049  av_strlcpy(reply->content_type, p, sizeof(reply->content_type));
1050  }
1051 }
1052 
1053 /* skip a RTP/TCP interleaved packet */
1055 {
1056  RTSPState *rt = s->priv_data;
1057  int ret, len, len1;
1058  uint8_t buf[1024];
1059 
1060  ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
1061  if (ret != 3)
1062  return;
1063  len = AV_RB16(buf + 1);
1064 
1065  av_dlog(s, "skipping RTP packet len=%d\n", len);
1066 
1067  /* skip payload */
1068  while (len > 0) {
1069  len1 = len;
1070  if (len1 > sizeof(buf))
1071  len1 = sizeof(buf);
1072  ret = ffurl_read_complete(rt->rtsp_hd, buf, len1);
1073  if (ret != len1)
1074  return;
1075  len -= len1;
1076  }
1077 }
1078 
1080  unsigned char **content_ptr,
1081  int return_on_interleaved_data, const char *method)
1082 {
1083  RTSPState *rt = s->priv_data;
1084  char buf[4096], buf1[1024], *q;
1085  unsigned char ch;
1086  const char *p;
1087  int ret, content_length, line_count = 0, request = 0;
1088  unsigned char *content = NULL;
1089 
1090 start:
1091  line_count = 0;
1092  request = 0;
1093  content = NULL;
1094  memset(reply, 0, sizeof(*reply));
1095 
1096  /* parse reply (XXX: use buffers) */
1097  rt->last_reply[0] = '\0';
1098  for (;;) {
1099  q = buf;
1100  for (;;) {
1101  ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1);
1102  av_dlog(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
1103  if (ret != 1)
1104  return AVERROR_EOF;
1105  if (ch == '\n')
1106  break;
1107  if (ch == '$') {
1108  /* XXX: only parse it if first char on line ? */
1109  if (return_on_interleaved_data) {
1110  return 1;
1111  } else
1113  } else if (ch != '\r') {
1114  if ((q - buf) < sizeof(buf) - 1)
1115  *q++ = ch;
1116  }
1117  }
1118  *q = '\0';
1119 
1120  av_dlog(s, "line='%s'\n", buf);
1121 
1122  /* test if last line */
1123  if (buf[0] == '\0')
1124  break;
1125  p = buf;
1126  if (line_count == 0) {
1127  /* get reply code */
1128  get_word(buf1, sizeof(buf1), &p);
1129  if (!strncmp(buf1, "RTSP/", 5)) {
1130  get_word(buf1, sizeof(buf1), &p);
1131  reply->status_code = atoi(buf1);
1132  av_strlcpy(reply->reason, p, sizeof(reply->reason));
1133  } else {
1134  av_strlcpy(reply->reason, buf1, sizeof(reply->reason)); // method
1135  get_word(buf1, sizeof(buf1), &p); // object
1136  request = 1;
1137  }
1138  } else {
1139  ff_rtsp_parse_line(reply, p, rt, method);
1140  av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
1141  av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1142  }
1143  line_count++;
1144  }
1145 
1146  if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0' && !request)
1147  av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
1148 
1149  content_length = reply->content_length;
1150  if (content_length > 0) {
1151  /* leave some room for a trailing '\0' (useful for simple parsing) */
1152  content = av_malloc(content_length + 1);
1153  if (!content)
1154  return AVERROR(ENOMEM);
1155  ffurl_read_complete(rt->rtsp_hd, content, content_length);
1156  content[content_length] = '\0';
1157  }
1158  if (content_ptr)
1159  *content_ptr = content;
1160  else
1161  av_free(content);
1162 
1163  if (request) {
1164  char buf[1024];
1165  char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1166  const char* ptr = buf;
1167 
1168  if (!strcmp(reply->reason, "OPTIONS")) {
1169  snprintf(buf, sizeof(buf), "RTSP/1.0 200 OK\r\n");
1170  if (reply->seq)
1171  av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", reply->seq);
1172  if (reply->session_id[0])
1173  av_strlcatf(buf, sizeof(buf), "Session: %s\r\n",
1174  reply->session_id);
1175  } else {
1176  snprintf(buf, sizeof(buf), "RTSP/1.0 501 Not Implemented\r\n");
1177  }
1178  av_strlcat(buf, "\r\n", sizeof(buf));
1179 
1180  if (rt->control_transport == RTSP_MODE_TUNNEL) {
1181  av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1182  ptr = base64buf;
1183  }
1184  ffurl_write(rt->rtsp_hd_out, ptr, strlen(ptr));
1185 
1186  rt->last_cmd_time = av_gettime();
1187  /* Even if the request from the server had data, it is not the data
1188  * that the caller wants or expects. The memory could also be leaked
1189  * if the actual following reply has content data. */
1190  if (content_ptr)
1191  av_freep(content_ptr);
1192  /* If method is set, this is called from ff_rtsp_send_cmd,
1193  * where a reply to exactly this request is awaited. For
1194  * callers from within packet receiving, we just want to
1195  * return to the caller and go back to receiving packets. */
1196  if (method)
1197  goto start;
1198  return 0;
1199  }
1200 
1201  if (rt->seq != reply->seq) {
1202  av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
1203  rt->seq, reply->seq);
1204  }
1205 
1206  /* EOS */
1207  if (reply->notice == 2101 /* End-of-Stream Reached */ ||
1208  reply->notice == 2104 /* Start-of-Stream Reached */ ||
1209  reply->notice == 2306 /* Continuous Feed Terminated */) {
1210  rt->state = RTSP_STATE_IDLE;
1211  } else if (reply->notice >= 4400 && reply->notice < 5500) {
1212  return AVERROR(EIO); /* data or server error */
1213  } else if (reply->notice == 2401 /* Ticket Expired */ ||
1214  (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
1215  return AVERROR(EPERM);
1216 
1217  return 0;
1218 }
1219 
1220 /**
1221  * Send a command to the RTSP server without waiting for the reply.
1222  *
1223  * @param s RTSP (de)muxer context
1224  * @param method the method for the request
1225  * @param url the target url for the request
1226  * @param headers extra header lines to include in the request
1227  * @param send_content if non-null, the data to send as request body content
1228  * @param send_content_length the length of the send_content data, or 0 if
1229  * send_content is null
1230  *
1231  * @return zero if success, nonzero otherwise
1232  */
1233 static int rtsp_send_cmd_with_content_async(AVFormatContext *s,
1234  const char *method, const char *url,
1235  const char *headers,
1236  const unsigned char *send_content,
1237  int send_content_length)
1238 {
1239  RTSPState *rt = s->priv_data;
1240  char buf[4096], *out_buf;
1241  char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1242 
1243  /* Add in RTSP headers */
1244  out_buf = buf;
1245  rt->seq++;
1246  snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
1247  if (headers)
1248  av_strlcat(buf, headers, sizeof(buf));
1249  av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
1250  av_strlcatf(buf, sizeof(buf), "User-Agent: %s\r\n", rt->user_agent);
1251  if (rt->session_id[0] != '\0' && (!headers ||
1252  !strstr(headers, "\nIf-Match:"))) {
1253  av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
1254  }
1255  if (rt->auth[0]) {
1256  char *str = ff_http_auth_create_response(&rt->auth_state,
1257  rt->auth, url, method);
1258  if (str)
1259  av_strlcat(buf, str, sizeof(buf));
1260  av_free(str);
1261  }
1262  if (send_content_length > 0 && send_content)
1263  av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
1264  av_strlcat(buf, "\r\n", sizeof(buf));
1265 
1266  /* base64 encode rtsp if tunneling */
1267  if (rt->control_transport == RTSP_MODE_TUNNEL) {
1268  av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1269  out_buf = base64buf;
1270  }
1271 
1272  av_dlog(s, "Sending:\n%s--\n", buf);
1273 
1274  ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
1275  if (send_content_length > 0 && send_content) {
1276  if (rt->control_transport == RTSP_MODE_TUNNEL) {
1277  av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
1278  "with content data not supported\n");
1279  return AVERROR_PATCHWELCOME;
1280  }
1281  ffurl_write(rt->rtsp_hd_out, send_content, send_content_length);
1282  }
1283  rt->last_cmd_time = av_gettime();
1284 
1285  return 0;
1286 }
1287 
1288 int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1289  const char *url, const char *headers)
1290 {
1291  return rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1292 }
1293 
1294 int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1295  const char *headers, RTSPMessageHeader *reply,
1296  unsigned char **content_ptr)
1297 {
1298  return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1299  content_ptr, NULL, 0);
1300 }
1301 
1303  const char *method, const char *url,
1304  const char *header,
1305  RTSPMessageHeader *reply,
1306  unsigned char **content_ptr,
1307  const unsigned char *send_content,
1308  int send_content_length)
1309 {
1310  RTSPState *rt = s->priv_data;
1311  HTTPAuthType cur_auth_type;
1312  int ret, attempts = 0;
1313 
1314 retry:
1315  cur_auth_type = rt->auth_state.auth_type;
1316  if ((ret = rtsp_send_cmd_with_content_async(s, method, url, header,
1317  send_content,
1318  send_content_length)))
1319  return ret;
1320 
1321  if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1322  return ret;
1323  attempts++;
1324 
1325  if (reply->status_code == 401 &&
1326  (cur_auth_type == HTTP_AUTH_NONE || rt->auth_state.stale) &&
1327  rt->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2)
1328  goto retry;
1329 
1330  if (reply->status_code > 400){
1331  av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1332  method,
1333  reply->status_code,
1334  reply->reason);
1335  av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1336  }
1337 
1338  return 0;
1339 }
1340 
1341 int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1342  int lower_transport, const char *real_challenge)
1343 {
1344  RTSPState *rt = s->priv_data;
1345  int rtx = 0, j, i, err, interleave = 0, port_off;
1346  RTSPStream *rtsp_st;
1347  RTSPMessageHeader reply1, *reply = &reply1;
1348  char cmd[2048];
1349  const char *trans_pref;
1350 
1351  if (rt->transport == RTSP_TRANSPORT_RDT)
1352  trans_pref = "x-pn-tng";
1353  else if (rt->transport == RTSP_TRANSPORT_RAW)
1354  trans_pref = "RAW/RAW";
1355  else
1356  trans_pref = "RTP/AVP";
1357 
1358  /* default timeout: 1 minute */
1359  rt->timeout = 60;
1360 
1361  /* Choose a random starting offset within the first half of the
1362  * port range, to allow for a number of ports to try even if the offset
1363  * happens to be at the end of the random range. */
1364  port_off = av_get_random_seed() % ((rt->rtp_port_max - rt->rtp_port_min)/2);
1365  /* even random offset */
1366  port_off -= port_off & 0x01;
1367 
1368  for (j = rt->rtp_port_min + port_off, i = 0; i < rt->nb_rtsp_streams; ++i) {
1369  char transport[2048];
1370 
1371  /*
1372  * WMS serves all UDP data over a single connection, the RTX, which
1373  * isn't necessarily the first in the SDP but has to be the first
1374  * to be set up, else the second/third SETUP will fail with a 461.
1375  */
1376  if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1377  rt->server_type == RTSP_SERVER_WMS) {
1378  if (i == 0) {
1379  /* rtx first */
1380  for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1381  int len = strlen(rt->rtsp_streams[rtx]->control_url);
1382  if (len >= 4 &&
1383  !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1384  "/rtx"))
1385  break;
1386  }
1387  if (rtx == rt->nb_rtsp_streams)
1388  return -1; /* no RTX found */
1389  rtsp_st = rt->rtsp_streams[rtx];
1390  } else
1391  rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1392  } else
1393  rtsp_st = rt->rtsp_streams[i];
1394 
1395  /* RTP/UDP */
1396  if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1397  char buf[256];
1398 
1399  if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1400  port = reply->transports[0].client_port_min;
1401  goto have_port;
1402  }
1403 
1404  /* first try in specified port range */
1405  while (j <= rt->rtp_port_max) {
1406  ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1407  "?localport=%d", j);
1408  /* we will use two ports per rtp stream (rtp and rtcp) */
1409  j += 2;
1410  if (!ffurl_open(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE,
1411  &s->interrupt_callback, NULL))
1412  goto rtp_opened;
1413  }
1414  av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1415  err = AVERROR(EIO);
1416  goto fail;
1417 
1418  rtp_opened:
1419  port = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1420  have_port:
1421  snprintf(transport, sizeof(transport) - 1,
1422  "%s/UDP;", trans_pref);
1423  if (rt->server_type != RTSP_SERVER_REAL)
1424  av_strlcat(transport, "unicast;", sizeof(transport));
1425  av_strlcatf(transport, sizeof(transport),
1426  "client_port=%d", port);
1427  if (rt->transport == RTSP_TRANSPORT_RTP &&
1428  !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1429  av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1430  }
1431 
1432  /* RTP/TCP */
1433  else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1434  /* For WMS streams, the application streams are only used for
1435  * UDP. When trying to set it up for TCP streams, the server
1436  * will return an error. Therefore, we skip those streams. */
1437  if (rt->server_type == RTSP_SERVER_WMS &&
1438  (rtsp_st->stream_index < 0 ||
1439  s->streams[rtsp_st->stream_index]->codec->codec_type ==
1441  continue;
1442  snprintf(transport, sizeof(transport) - 1,
1443  "%s/TCP;", trans_pref);
1444  if (rt->transport != RTSP_TRANSPORT_RDT)
1445  av_strlcat(transport, "unicast;", sizeof(transport));
1446  av_strlcatf(transport, sizeof(transport),
1447  "interleaved=%d-%d",
1448  interleave, interleave + 1);
1449  interleave += 2;
1450  }
1451 
1452  else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1453  snprintf(transport, sizeof(transport) - 1,
1454  "%s/UDP;multicast", trans_pref);
1455  }
1456  if (s->oformat) {
1457  av_strlcat(transport, ";mode=record", sizeof(transport));
1458  } else if (rt->server_type == RTSP_SERVER_REAL ||
1460  av_strlcat(transport, ";mode=play", sizeof(transport));
1461  snprintf(cmd, sizeof(cmd),
1462  "Transport: %s\r\n",
1463  transport);
1464  if (rt->accept_dynamic_rate)
1465  av_strlcat(cmd, "x-Dynamic-Rate: 0\r\n", sizeof(cmd));
1466  if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1467  char real_res[41], real_csum[9];
1468  ff_rdt_calc_response_and_checksum(real_res, real_csum,
1469  real_challenge);
1470  av_strlcatf(cmd, sizeof(cmd),
1471  "If-Match: %s\r\n"
1472  "RealChallenge2: %s, sd=%s\r\n",
1473  rt->session_id, real_res, real_csum);
1474  }
1475  ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1476  if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1477  err = 1;
1478  goto fail;
1479  } else if (reply->status_code != RTSP_STATUS_OK ||
1480  reply->nb_transports != 1) {
1481  err = AVERROR_INVALIDDATA;
1482  goto fail;
1483  }
1484 
1485  /* XXX: same protocol for all streams is required */
1486  if (i > 0) {
1487  if (reply->transports[0].lower_transport != rt->lower_transport ||
1488  reply->transports[0].transport != rt->transport) {
1489  err = AVERROR_INVALIDDATA;
1490  goto fail;
1491  }
1492  } else {
1493  rt->lower_transport = reply->transports[0].lower_transport;
1494  rt->transport = reply->transports[0].transport;
1495  }
1496 
1497  /* Fail if the server responded with another lower transport mode
1498  * than what we requested. */
1499  if (reply->transports[0].lower_transport != lower_transport) {
1500  av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1501  err = AVERROR_INVALIDDATA;
1502  goto fail;
1503  }
1504 
1505  switch(reply->transports[0].lower_transport) {
1507  rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1508  rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1509  break;
1510 
1511  case RTSP_LOWER_TRANSPORT_UDP: {
1512  char url[1024], options[30] = "";
1513  const char *peer = host;
1514 
1515  if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC)
1516  av_strlcpy(options, "?connect=1", sizeof(options));
1517  /* Use source address if specified */
1518  if (reply->transports[0].source[0])
1519  peer = reply->transports[0].source;
1520  ff_url_join(url, sizeof(url), "rtp", NULL, peer,
1521  reply->transports[0].server_port_min, "%s", options);
1522  if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1523  ff_rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1524  err = AVERROR_INVALIDDATA;
1525  goto fail;
1526  }
1527  /* Try to initialize the connection state in a
1528  * potential NAT router by sending dummy packets.
1529  * RTP/RTCP dummy packets are used for RDT, too.
1530  */
1531  if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1532  CONFIG_RTPDEC)
1534  break;
1535  }
1537  char url[1024], namebuf[50], optbuf[20] = "";
1538  struct sockaddr_storage addr;
1539  int port, ttl;
1540 
1541  if (reply->transports[0].destination.ss_family) {
1542  addr = reply->transports[0].destination;
1543  port = reply->transports[0].port_min;
1544  ttl = reply->transports[0].ttl;
1545  } else {
1546  addr = rtsp_st->sdp_ip;
1547  port = rtsp_st->sdp_port;
1548  ttl = rtsp_st->sdp_ttl;
1549  }
1550  if (ttl > 0)
1551  snprintf(optbuf, sizeof(optbuf), "?ttl=%d", ttl);
1552  getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1553  namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1554  ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1555  port, "%s", optbuf);
1556  if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
1557  &s->interrupt_callback, NULL) < 0) {
1558  err = AVERROR_INVALIDDATA;
1559  goto fail;
1560  }
1561  break;
1562  }
1563  }
1564 
1565  if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
1566  goto fail;
1567  }
1568 
1569  if (rt->nb_rtsp_streams && reply->timeout > 0)
1570  rt->timeout = reply->timeout;
1571 
1572  if (rt->server_type == RTSP_SERVER_REAL)
1573  rt->need_subscription = 1;
1574 
1575  return 0;
1576 
1577 fail:
1578  ff_rtsp_undo_setup(s, 0);
1579  return err;
1580 }
1581 
1583 {
1584  RTSPState *rt = s->priv_data;
1585  if (rt->rtsp_hd_out != rt->rtsp_hd) ffurl_close(rt->rtsp_hd_out);
1586  ffurl_close(rt->rtsp_hd);
1587  rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1588 }
1589 
1591 {
1592  RTSPState *rt = s->priv_data;
1593  char proto[128], host[1024], path[1024];
1594  char tcpname[1024], cmd[2048], auth[128];
1595  const char *lower_rtsp_proto = "tcp";
1596  int port, err, tcp_fd;
1597  RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1598  int lower_transport_mask = 0;
1599  int default_port = RTSP_DEFAULT_PORT;
1600  char real_challenge[64] = "";
1601  struct sockaddr_storage peer;
1602  socklen_t peer_len = sizeof(peer);
1603 
1604  if (rt->rtp_port_max < rt->rtp_port_min) {
1605  av_log(s, AV_LOG_ERROR, "Invalid UDP port range, max port %d less "
1606  "than min port %d\n", rt->rtp_port_max,
1607  rt->rtp_port_min);
1608  return AVERROR(EINVAL);
1609  }
1610 
1611  if (!ff_network_init())
1612  return AVERROR(EIO);
1613 
1614  if (s->max_delay < 0) /* Not set by the caller */
1616 
1621  }
1622  /* Only pass through valid flags from here */
1624 
1625 redirect:
1626  /* extract hostname and port */
1627  av_url_split(proto, sizeof(proto), auth, sizeof(auth),
1628  host, sizeof(host), &port, path, sizeof(path), s->filename);
1629 
1630  if (!strcmp(proto, "rtsps")) {
1631  lower_rtsp_proto = "tls";
1632  default_port = RTSPS_DEFAULT_PORT;
1634  }
1635 
1636  if (*auth) {
1637  av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1638  }
1639  if (port < 0)
1640  port = default_port;
1641 
1642  lower_transport_mask = rt->lower_transport_mask;
1643 
1644  if (!lower_transport_mask)
1645  lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1646 
1647  if (s->oformat) {
1648  /* Only UDP or TCP - UDP multicast isn't supported. */
1649  lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1650  (1 << RTSP_LOWER_TRANSPORT_TCP);
1651  if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1652  av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1653  "only UDP and TCP are supported for output.\n");
1654  err = AVERROR(EINVAL);
1655  goto fail;
1656  }
1657  }
1658 
1659  /* Construct the URI used in request; this is similar to s->filename,
1660  * but with authentication credentials removed and RTSP specific options
1661  * stripped out. */
1662  ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL,
1663  host, port, "%s", path);
1664 
1665  if (rt->control_transport == RTSP_MODE_TUNNEL) {
1666  /* set up initial handshake for tunneling */
1667  char httpname[1024];
1668  char sessioncookie[17];
1669  char headers[1024];
1670 
1671  ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1672  snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1674 
1675  /* GET requests */
1676  if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ,
1677  &s->interrupt_callback) < 0) {
1678  err = AVERROR(EIO);
1679  goto fail;
1680  }
1681 
1682  /* generate GET headers */
1683  snprintf(headers, sizeof(headers),
1684  "x-sessioncookie: %s\r\n"
1685  "Accept: application/x-rtsp-tunnelled\r\n"
1686  "Pragma: no-cache\r\n"
1687  "Cache-Control: no-cache\r\n",
1688  sessioncookie);
1689  av_opt_set(rt->rtsp_hd->priv_data, "headers", headers, 0);
1690 
1691  /* complete the connection */
1692  if (ffurl_connect(rt->rtsp_hd, NULL)) {
1693  err = AVERROR(EIO);
1694  goto fail;
1695  }
1696 
1697  /* POST requests */
1698  if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE,
1699  &s->interrupt_callback) < 0 ) {
1700  err = AVERROR(EIO);
1701  goto fail;
1702  }
1703 
1704  /* generate POST headers */
1705  snprintf(headers, sizeof(headers),
1706  "x-sessioncookie: %s\r\n"
1707  "Content-Type: application/x-rtsp-tunnelled\r\n"
1708  "Pragma: no-cache\r\n"
1709  "Cache-Control: no-cache\r\n"
1710  "Content-Length: 32767\r\n"
1711  "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1712  sessioncookie);
1713  av_opt_set(rt->rtsp_hd_out->priv_data, "headers", headers, 0);
1714  av_opt_set(rt->rtsp_hd_out->priv_data, "chunked_post", "0", 0);
1715 
1716  /* Initialize the authentication state for the POST session. The HTTP
1717  * protocol implementation doesn't properly handle multi-pass
1718  * authentication for POST requests, since it would require one of
1719  * the following:
1720  * - implementing Expect: 100-continue, which many HTTP servers
1721  * don't support anyway, even less the RTSP servers that do HTTP
1722  * tunneling
1723  * - sending the whole POST data until getting a 401 reply specifying
1724  * what authentication method to use, then resending all that data
1725  * - waiting for potential 401 replies directly after sending the
1726  * POST header (waiting for some unspecified time)
1727  * Therefore, we copy the full auth state, which works for both basic
1728  * and digest. (For digest, we would have to synchronize the nonce
1729  * count variable between the two sessions, if we'd do more requests
1730  * with the original session, though.)
1731  */
1733 
1734  /* complete the connection */
1735  if (ffurl_connect(rt->rtsp_hd_out, NULL)) {
1736  err = AVERROR(EIO);
1737  goto fail;
1738  }
1739  } else {
1740  /* open the tcp connection */
1741  ff_url_join(tcpname, sizeof(tcpname), lower_rtsp_proto, NULL,
1742  host, port,
1743  "?timeout=%d", rt->stimeout);
1744  if (ffurl_open(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
1745  &s->interrupt_callback, NULL) < 0) {
1746  err = AVERROR(EIO);
1747  goto fail;
1748  }
1749  rt->rtsp_hd_out = rt->rtsp_hd;
1750  }
1751  rt->seq = 0;
1752 
1753  tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1754  if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1755  getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1756  NULL, 0, NI_NUMERICHOST);
1757  }
1758 
1759  /* request options supported by the server; this also detects server
1760  * type */
1761  for (rt->server_type = RTSP_SERVER_RTP;;) {
1762  cmd[0] = 0;
1763  if (rt->server_type == RTSP_SERVER_REAL)
1764  av_strlcat(cmd,
1765  /*
1766  * The following entries are required for proper
1767  * streaming from a Realmedia server. They are
1768  * interdependent in some way although we currently
1769  * don't quite understand how. Values were copied
1770  * from mplayer SVN r23589.
1771  * ClientChallenge is a 16-byte ID in hex
1772  * CompanyID is a 16-byte ID in base64
1773  */
1774  "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1775  "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1776  "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1777  "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1778  sizeof(cmd));
1779  ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1780  if (reply->status_code != RTSP_STATUS_OK) {
1781  err = AVERROR_INVALIDDATA;
1782  goto fail;
1783  }
1784 
1785  /* detect server type if not standard-compliant RTP */
1786  if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1788  continue;
1789  } else if (!av_strncasecmp(reply->server, "WMServer/", 9)) {
1791  } else if (rt->server_type == RTSP_SERVER_REAL)
1792  strcpy(real_challenge, reply->real_challenge);
1793  break;
1794  }
1795 
1796  if (s->iformat && CONFIG_RTSP_DEMUXER)
1797  err = ff_rtsp_setup_input_streams(s, reply);
1798  else if (CONFIG_RTSP_MUXER)
1799  err = ff_rtsp_setup_output_streams(s, host);
1800  if (err)
1801  goto fail;
1802 
1803  do {
1804  int lower_transport = ff_log2_tab[lower_transport_mask &
1805  ~(lower_transport_mask - 1)];
1806 
1807  if ((lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_TCP))
1808  && (rt->rtsp_flags & RTSP_FLAG_PREFER_TCP))
1809  lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1810 
1811  err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1812  rt->server_type == RTSP_SERVER_REAL ?
1813  real_challenge : NULL);
1814  if (err < 0)
1815  goto fail;
1816  lower_transport_mask &= ~(1 << lower_transport);
1817  if (lower_transport_mask == 0 && err == 1) {
1818  err = AVERROR(EPROTONOSUPPORT);
1819  goto fail;
1820  }
1821  } while (err);
1822 
1823  rt->lower_transport_mask = lower_transport_mask;
1824  av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1825  rt->state = RTSP_STATE_IDLE;
1826  rt->seek_timestamp = 0; /* default is to start stream at position zero */
1827  return 0;
1828  fail:
1831  if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1832  av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1833  rt->session_id[0] = '\0';
1834  av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1835  reply->status_code,
1836  s->filename);
1837  goto redirect;
1838  }
1839  ff_network_close();
1840  return err;
1841 }
1842 #endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1843 
1844 #if CONFIG_RTPDEC
1845 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1846  uint8_t *buf, int buf_size, int64_t wait_end)
1847 {
1848  RTSPState *rt = s->priv_data;
1849  RTSPStream *rtsp_st;
1850  int n, i, ret, tcp_fd, timeout_cnt = 0;
1851  int max_p = 0;
1852  struct pollfd *p = rt->p;
1853  int *fds = NULL, fdsnum, fdsidx;
1854 
1855  for (;;) {
1857  return AVERROR_EXIT;
1858  if (wait_end && wait_end - av_gettime() < 0)
1859  return AVERROR(EAGAIN);
1860  max_p = 0;
1861  if (rt->rtsp_hd) {
1862  tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1863  p[max_p].fd = tcp_fd;
1864  p[max_p++].events = POLLIN;
1865  } else {
1866  tcp_fd = -1;
1867  }
1868  for (i = 0; i < rt->nb_rtsp_streams; i++) {
1869  rtsp_st = rt->rtsp_streams[i];
1870  if (rtsp_st->rtp_handle) {
1871  if (ret = ffurl_get_multi_file_handle(rtsp_st->rtp_handle,
1872  &fds, &fdsnum)) {
1873  av_log(s, AV_LOG_ERROR, "Unable to recover rtp ports\n");
1874  return ret;
1875  }
1876  if (fdsnum != 2) {
1877  av_log(s, AV_LOG_ERROR,
1878  "Number of fds %d not supported\n", fdsnum);
1879  return AVERROR_INVALIDDATA;
1880  }
1881  for (fdsidx = 0; fdsidx < fdsnum; fdsidx++) {
1882  p[max_p].fd = fds[fdsidx];
1883  p[max_p++].events = POLLIN;
1884  }
1885  av_free(fds);
1886  }
1887  }
1888  n = poll(p, max_p, POLL_TIMEOUT_MS);
1889  if (n > 0) {
1890  int j = 1 - (tcp_fd == -1);
1891  timeout_cnt = 0;
1892  for (i = 0; i < rt->nb_rtsp_streams; i++) {
1893  rtsp_st = rt->rtsp_streams[i];
1894  if (rtsp_st->rtp_handle) {
1895  if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
1896  ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size);
1897  if (ret > 0) {
1898  *prtsp_st = rtsp_st;
1899  return ret;
1900  }
1901  }
1902  j+=2;
1903  }
1904  }
1905 #if CONFIG_RTSP_DEMUXER
1906  if (tcp_fd != -1 && p[0].revents & POLLIN) {
1907  if (rt->rtsp_flags & RTSP_FLAG_LISTEN) {
1908  if (rt->state == RTSP_STATE_STREAMING) {
1910  return AVERROR_EOF;
1911  else
1913  "Unable to answer to TEARDOWN\n");
1914  } else
1915  return 0;
1916  } else {
1917  RTSPMessageHeader reply;
1918  ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1919  if (ret < 0)
1920  return ret;
1921  /* XXX: parse message */
1922  if (rt->state != RTSP_STATE_STREAMING)
1923  return 0;
1924  }
1925  }
1926 #endif
1927  } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1928  return AVERROR(ETIMEDOUT);
1929  } else if (n < 0 && errno != EINTR)
1930  return AVERROR(errno);
1931  }
1932 }
1933 
1934 static int pick_stream(AVFormatContext *s, RTSPStream **rtsp_st,
1935  const uint8_t *buf, int len)
1936 {
1937  RTSPState *rt = s->priv_data;
1938  int i;
1939  if (len < 0)
1940  return len;
1941  if (rt->nb_rtsp_streams == 1) {
1942  *rtsp_st = rt->rtsp_streams[0];
1943  return len;
1944  }
1945  if (len >= 8 && rt->transport == RTSP_TRANSPORT_RTP) {
1946  if (RTP_PT_IS_RTCP(rt->recvbuf[1])) {
1947  int no_ssrc = 0;
1948  for (i = 0; i < rt->nb_rtsp_streams; i++) {
1949  RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1950  if (!rtpctx)
1951  continue;
1952  if (rtpctx->ssrc == AV_RB32(&buf[4])) {
1953  *rtsp_st = rt->rtsp_streams[i];
1954  return len;
1955  }
1956  if (!rtpctx->ssrc)
1957  no_ssrc = 1;
1958  }
1959  if (no_ssrc) {
1961  "Unable to pick stream for packet - SSRC not known for "
1962  "all streams\n");
1963  return AVERROR(EAGAIN);
1964  }
1965  } else {
1966  for (i = 0; i < rt->nb_rtsp_streams; i++) {
1967  if ((buf[1] & 0x7f) == rt->rtsp_streams[i]->sdp_payload_type) {
1968  *rtsp_st = rt->rtsp_streams[i];
1969  return len;
1970  }
1971  }
1972  }
1973  }
1974  av_log(s, AV_LOG_WARNING, "Unable to pick stream for packet\n");
1975  return AVERROR(EAGAIN);
1976 }
1977 
1979 {
1980  RTSPState *rt = s->priv_data;
1981  int ret, len;
1982  RTSPStream *rtsp_st, *first_queue_st = NULL;
1983  int64_t wait_end = 0;
1984 
1985  if (rt->nb_byes == rt->nb_rtsp_streams)
1986  return AVERROR_EOF;
1987 
1988  /* get next frames from the same RTP packet */
1989  if (rt->cur_transport_priv) {
1990  if (rt->transport == RTSP_TRANSPORT_RDT) {
1991  ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1992  } else if (rt->transport == RTSP_TRANSPORT_RTP) {
1993  ret = ff_rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1994  } else if (rt->ts && CONFIG_RTPDEC) {
1995  ret = avpriv_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf + rt->recvbuf_pos, rt->recvbuf_len - rt->recvbuf_pos);
1996  if (ret >= 0) {
1997  rt->recvbuf_pos += ret;
1998  ret = rt->recvbuf_pos < rt->recvbuf_len;
1999  }
2000  } else
2001  ret = -1;
2002  if (ret == 0) {
2003  rt->cur_transport_priv = NULL;
2004  return 0;
2005  } else if (ret == 1) {
2006  return 0;
2007  } else
2008  rt->cur_transport_priv = NULL;
2009  }
2010 
2011 redo:
2012  if (rt->transport == RTSP_TRANSPORT_RTP) {
2013  int i;
2014  int64_t first_queue_time = 0;
2015  for (i = 0; i < rt->nb_rtsp_streams; i++) {
2016  RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
2017  int64_t queue_time;
2018  if (!rtpctx)
2019  continue;
2020  queue_time = ff_rtp_queued_packet_time(rtpctx);
2021  if (queue_time && (queue_time - first_queue_time < 0 ||
2022  !first_queue_time)) {
2023  first_queue_time = queue_time;
2024  first_queue_st = rt->rtsp_streams[i];
2025  }
2026  }
2027  if (first_queue_time) {
2028  wait_end = first_queue_time + s->max_delay;
2029  } else {
2030  wait_end = 0;
2031  first_queue_st = NULL;
2032  }
2033  }
2034 
2035  /* read next RTP packet */
2036  if (!rt->recvbuf) {
2038  if (!rt->recvbuf)
2039  return AVERROR(ENOMEM);
2040  }
2041 
2042  switch(rt->lower_transport) {
2043  default:
2044 #if CONFIG_RTSP_DEMUXER
2046  len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
2047  break;
2048 #endif
2051  len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
2052  if (len > 0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
2053  ff_rtp_check_and_send_back_rr(rtsp_st->transport_priv, rtsp_st->rtp_handle, NULL, len);
2054  break;
2056  if (first_queue_st && rt->transport == RTSP_TRANSPORT_RTP &&
2057  wait_end && wait_end < av_gettime())
2058  len = AVERROR(EAGAIN);
2059  else
2060  len = ffio_read_partial(s->pb, rt->recvbuf, RECVBUF_SIZE);
2061  len = pick_stream(s, &rtsp_st, rt->recvbuf, len);
2062  if (len > 0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
2063  ff_rtp_check_and_send_back_rr(rtsp_st->transport_priv, NULL, s->pb, len);
2064  break;
2065  }
2066  if (len == AVERROR(EAGAIN) && first_queue_st &&
2067  rt->transport == RTSP_TRANSPORT_RTP) {
2068  rtsp_st = first_queue_st;
2069  ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
2070  goto end;
2071  }
2072  if (len < 0)
2073  return len;
2074  if (len == 0)
2075  return AVERROR_EOF;
2076  if (rt->transport == RTSP_TRANSPORT_RDT) {
2077  ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2078  } else if (rt->transport == RTSP_TRANSPORT_RTP) {
2079  ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2080  if (rtsp_st->feedback) {
2081  AVIOContext *pb = NULL;
2083  pb = s->pb;
2084  ff_rtp_send_rtcp_feedback(rtsp_st->transport_priv, rtsp_st->rtp_handle, pb);
2085  }
2086  if (ret < 0) {
2087  /* Either bad packet, or a RTCP packet. Check if the
2088  * first_rtcp_ntp_time field was initialized. */
2089  RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
2090  if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
2091  /* first_rtcp_ntp_time has been initialized for this stream,
2092  * copy the same value to all other uninitialized streams,
2093  * in order to map their timestamp origin to the same ntp time
2094  * as this one. */
2095  int i;
2096  AVStream *st = NULL;
2097  if (rtsp_st->stream_index >= 0)
2098  st = s->streams[rtsp_st->stream_index];
2099  for (i = 0; i < rt->nb_rtsp_streams; i++) {
2100  RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
2101  AVStream *st2 = NULL;
2102  if (rt->rtsp_streams[i]->stream_index >= 0)
2103  st2 = s->streams[rt->rtsp_streams[i]->stream_index];
2104  if (rtpctx2 && st && st2 &&
2105  rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
2106  rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
2107  rtpctx2->rtcp_ts_offset = av_rescale_q(
2108  rtpctx->rtcp_ts_offset, st->time_base,
2109  st2->time_base);
2110  }
2111  }
2112  // Make real NTP start time available in AVFormatContext
2113  if (s->start_time_realtime == AV_NOPTS_VALUE) {
2114  s->start_time_realtime = av_rescale (rtpctx->first_rtcp_ntp_time - (NTP_OFFSET << 32), 1000000, 1LL << 32);
2115  if (rtpctx->st) {
2116  s->start_time_realtime -=
2117  av_rescale (rtpctx->rtcp_ts_offset,
2118  (uint64_t) rtpctx->st->time_base.num * 1000000,
2119  rtpctx->st->time_base.den);
2120  }
2121  }
2122  }
2123  if (ret == -RTCP_BYE) {
2124  rt->nb_byes++;
2125 
2126  av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
2127  rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
2128 
2129  if (rt->nb_byes == rt->nb_rtsp_streams)
2130  return AVERROR_EOF;
2131  }
2132  }
2133  } else if (rt->ts && CONFIG_RTPDEC) {
2134  ret = avpriv_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf, len);
2135  if (ret >= 0) {
2136  if (ret < len) {
2137  rt->recvbuf_len = len;
2138  rt->recvbuf_pos = ret;
2139  rt->cur_transport_priv = rt->ts;
2140  return 1;
2141  } else {
2142  ret = 0;
2143  }
2144  }
2145  } else {
2146  return AVERROR_INVALIDDATA;
2147  }
2148 end:
2149  if (ret < 0)
2150  goto redo;
2151  if (ret == 1)
2152  /* more packets may follow, so we save the RTP context */
2153  rt->cur_transport_priv = rtsp_st->transport_priv;
2154 
2155  return ret;
2156 }
2157 #endif /* CONFIG_RTPDEC */
2158 
2159 #if CONFIG_SDP_DEMUXER
2160 static int sdp_probe(AVProbeData *p1)
2161 {
2162  const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
2163 
2164  /* we look for a line beginning "c=IN IP" */
2165  while (p < p_end && *p != '\0') {
2166  if (p + sizeof("c=IN IP") - 1 < p_end &&
2167  av_strstart(p, "c=IN IP", NULL))
2168  return AVPROBE_SCORE_EXTENSION;
2169 
2170  while (p < p_end - 1 && *p != '\n') p++;
2171  if (++p >= p_end)
2172  break;
2173  if (*p == '\r')
2174  p++;
2175  }
2176  return 0;
2177 }
2178 
2179 static void append_source_addrs(char *buf, int size, const char *name,
2180  int count, struct RTSPSource **addrs)
2181 {
2182  int i;
2183  if (!count)
2184  return;
2185  av_strlcatf(buf, size, "&%s=%s", name, addrs[0]->addr);
2186  for (i = 1; i < count; i++)
2187  av_strlcatf(buf, size, ",%s", addrs[i]->addr);
2188 }
2189 
2190 static int sdp_read_header(AVFormatContext *s)
2191 {
2192  RTSPState *rt = s->priv_data;
2193  RTSPStream *rtsp_st;
2194  int size, i, err;
2195  char *content;
2196  char url[1024];
2197 
2198  if (!ff_network_init())
2199  return AVERROR(EIO);
2200 
2201  if (s->max_delay < 0) /* Not set by the caller */
2203  if (rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)
2205 
2206  /* read the whole sdp file */
2207  /* XXX: better loading */
2208  content = av_malloc(SDP_MAX_SIZE);
2209  size = avio_read(s->pb, content, SDP_MAX_SIZE - 1);
2210  if (size <= 0) {
2211  av_free(content);
2212  return AVERROR_INVALIDDATA;
2213  }
2214  content[size] ='\0';
2215 
2216  err = ff_sdp_parse(s, content);
2217  av_free(content);
2218  if (err) goto fail;
2219 
2220  /* open each RTP stream */
2221  for (i = 0; i < rt->nb_rtsp_streams; i++) {
2222  char namebuf[50];
2223  rtsp_st = rt->rtsp_streams[i];
2224 
2225  if (!(rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)) {
2226  getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
2227  namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
2228  ff_url_join(url, sizeof(url), "rtp", NULL,
2229  namebuf, rtsp_st->sdp_port,
2230  "?localport=%d&ttl=%d&connect=%d&write_to_source=%d",
2231  rtsp_st->sdp_port, rtsp_st->sdp_ttl,
2232  rt->rtsp_flags & RTSP_FLAG_FILTER_SRC ? 1 : 0,
2233  rt->rtsp_flags & RTSP_FLAG_RTCP_TO_SOURCE ? 1 : 0);
2234 
2235  append_source_addrs(url, sizeof(url), "sources",
2236  rtsp_st->nb_include_source_addrs,
2237  rtsp_st->include_source_addrs);
2238  append_source_addrs(url, sizeof(url), "block",
2239  rtsp_st->nb_exclude_source_addrs,
2240  rtsp_st->exclude_source_addrs);
2241  if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
2242  &s->interrupt_callback, NULL) < 0) {
2243  err = AVERROR_INVALIDDATA;
2244  goto fail;
2245  }
2246  }
2247  if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
2248  goto fail;
2249  }
2250  return 0;
2251 fail:
2253  ff_network_close();
2254  return err;
2255 }
2256 
2257 static int sdp_read_close(AVFormatContext *s)
2258 {
2260  ff_network_close();
2261  return 0;
2262 }
2263 
2264 static const AVClass sdp_demuxer_class = {
2265  .class_name = "SDP demuxer",
2266  .item_name = av_default_item_name,
2267  .option = sdp_options,
2268  .version = LIBAVUTIL_VERSION_INT,
2269 };
2270 
2271 AVInputFormat ff_sdp_demuxer = {
2272  .name = "sdp",
2273  .long_name = NULL_IF_CONFIG_SMALL("SDP"),
2274  .priv_data_size = sizeof(RTSPState),
2275  .read_probe = sdp_probe,
2276  .read_header = sdp_read_header,
2278  .read_close = sdp_read_close,
2279  .priv_class = &sdp_demuxer_class,
2280 };
2281 #endif /* CONFIG_SDP_DEMUXER */
2282 
2283 #if CONFIG_RTP_DEMUXER
2284 static int rtp_probe(AVProbeData *p)
2285 {
2286  if (av_strstart(p->filename, "rtp:", NULL))
2287  return AVPROBE_SCORE_MAX;
2288  return 0;
2289 }
2290 
2291 static int rtp_read_header(AVFormatContext *s)
2292 {
2293  uint8_t recvbuf[RTP_MAX_PACKET_LENGTH];
2294  char host[500], sdp[500];
2295  int ret, port;
2296  URLContext* in = NULL;
2297  int payload_type;
2298  AVCodecContext codec = { 0 };
2299  struct sockaddr_storage addr;
2300  AVIOContext pb;
2301  socklen_t addrlen = sizeof(addr);
2302  RTSPState *rt = s->priv_data;
2303 
2304  if (!ff_network_init())
2305  return AVERROR(EIO);
2306 
2307  ret = ffurl_open(&in, s->filename, AVIO_FLAG_READ,
2308  &s->interrupt_callback, NULL);
2309  if (ret)
2310  goto fail;
2311 
2312  while (1) {
2313  ret = ffurl_read(in, recvbuf, sizeof(recvbuf));
2314  if (ret == AVERROR(EAGAIN))
2315  continue;
2316  if (ret < 0)
2317  goto fail;
2318  if (ret < 12) {
2319  av_log(s, AV_LOG_WARNING, "Received too short packet\n");
2320  continue;
2321  }
2322 
2323  if ((recvbuf[0] & 0xc0) != 0x80) {
2324  av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
2325  "received\n");
2326  continue;
2327  }
2328 
2329  if (RTP_PT_IS_RTCP(recvbuf[1]))
2330  continue;
2331 
2332  payload_type = recvbuf[1] & 0x7f;
2333  break;
2334  }
2335  getsockname(ffurl_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
2336  ffurl_close(in);
2337  in = NULL;
2338 
2339  if (ff_rtp_get_codec_info(&codec, payload_type)) {
2340  av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
2341  "without an SDP file describing it\n",
2342  payload_type);
2343  goto fail;
2344  }
2345  if (codec.codec_type != AVMEDIA_TYPE_DATA) {
2346  av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
2347  "properly you need an SDP file "
2348  "describing it\n");
2349  }
2350 
2351  av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
2352  NULL, 0, s->filename);
2353 
2354  snprintf(sdp, sizeof(sdp),
2355  "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
2356  addr.ss_family == AF_INET ? 4 : 6, host,
2357  codec.codec_type == AVMEDIA_TYPE_DATA ? "application" :
2358  codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
2359  port, payload_type);
2360  av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
2361 
2362  ffio_init_context(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
2363  s->pb = &pb;
2364 
2365  /* sdp_read_header initializes this again */
2366  ff_network_close();
2367 
2368  rt->media_type_mask = (1 << (AVMEDIA_TYPE_DATA+1)) - 1;
2369 
2370  ret = sdp_read_header(s);
2371  s->pb = NULL;
2372  return ret;
2373 
2374 fail:
2375  if (in)
2376  ffurl_close(in);
2377  ff_network_close();
2378  return ret;
2379 }
2380 
2381 static const AVClass rtp_demuxer_class = {
2382  .class_name = "RTP demuxer",
2383  .item_name = av_default_item_name,
2384  .option = rtp_options,
2385  .version = LIBAVUTIL_VERSION_INT,
2386 };
2387 
2388 AVInputFormat ff_rtp_demuxer = {
2389  .name = "rtp",
2390  .long_name = NULL_IF_CONFIG_SMALL("RTP input"),
2391  .priv_data_size = sizeof(RTSPState),
2392  .read_probe = rtp_probe,
2393  .read_header = rtp_read_header,
2395  .read_close = sdp_read_close,
2396  .flags = AVFMT_NOFILE,
2397  .priv_class = &rtp_demuxer_class,
2398 };
2399 #endif /* CONFIG_RTP_DEMUXER */