sdp: Add an option for sending RTCP packets to the source of the last packets
[libav.git] / libavformat / rtsp.c
1 /*
2 * RTSP/SDP client
3 * Copyright (c) 2002 Fabrice Bellard
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; 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/base64.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/mathematics.h"
26 #include "libavutil/parseutils.h"
27 #include "libavutil/random_seed.h"
28 #include "libavutil/dict.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/time.h"
31 #include "avformat.h"
32 #include "avio_internal.h"
33
34 #if HAVE_POLL_H
35 #include <poll.h>
36 #endif
37 #include "internal.h"
38 #include "network.h"
39 #include "os_support.h"
40 #include "http.h"
41 #include "rtsp.h"
42
43 #include "rtpdec.h"
44 #include "rtpproto.h"
45 #include "rdt.h"
46 #include "rtpdec_formats.h"
47 #include "rtpenc_chain.h"
48 #include "url.h"
49 #include "rtpenc.h"
50 #include "mpegts.h"
51
52 /* Timeout values for socket poll, in ms,
53 * and read_packet(), in seconds */
54 #define POLL_TIMEOUT_MS 100
55 #define READ_PACKET_TIMEOUT_S 10
56 #define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / POLL_TIMEOUT_MS
57 #define SDP_MAX_SIZE 16384
58 #define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
59 #define DEFAULT_REORDERING_DELAY 100000
60
61 #define OFFSET(x) offsetof(RTSPState, x)
62 #define DEC AV_OPT_FLAG_DECODING_PARAM
63 #define ENC AV_OPT_FLAG_ENCODING_PARAM
64
65 #define RTSP_FLAG_OPTS(name, longname) \
66 { name, longname, OFFSET(rtsp_flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC, "rtsp_flags" }, \
67 { "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" }
68
69 #define RTSP_MEDIATYPE_OPTS(name, longname) \
70 { 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" }, \
71 { "video", "Video", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_VIDEO}, 0, 0, DEC, "allowed_media_types" }, \
72 { "audio", "Audio", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_AUDIO}, 0, 0, DEC, "allowed_media_types" }, \
73 { "data", "Data", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_DATA}, 0, 0, DEC, "allowed_media_types" }
74
75 #define RTSP_REORDERING_OPTS() \
76 { "reorder_queue_size", "Number of packets to buffer for handling of reordered packets", OFFSET(reordering_queue_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, DEC }
77
78 const AVOption ff_rtsp_options[] = {
79 { "initial_pause", "Don't start playing the stream immediately", OFFSET(initial_pause), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DEC },
80 FF_RTP_FLAG_OPTS(RTSPState, rtp_muxer_flags),
81 { "rtsp_transport", "RTSP transport protocols", OFFSET(lower_transport_mask), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC|ENC, "rtsp_transport" }, \
82 { "udp", "UDP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
83 { "tcp", "TCP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_TCP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
84 { "udp_multicast", "UDP multicast", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP_MULTICAST}, 0, 0, DEC, "rtsp_transport" },
85 { "http", "HTTP tunneling", 0, AV_OPT_TYPE_CONST, {.i64 = (1 << RTSP_LOWER_TRANSPORT_HTTP)}, 0, 0, DEC, "rtsp_transport" },
86 RTSP_FLAG_OPTS("rtsp_flags", "RTSP flags"),
87 { "listen", "Wait for incoming connections", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_LISTEN}, 0, 0, DEC, "rtsp_flags" },
88 RTSP_MEDIATYPE_OPTS("allowed_media_types", "Media types to accept from the server"),
89 { "min_port", "Minimum local UDP port", OFFSET(rtp_port_min), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MIN}, 0, 65535, DEC|ENC },
90 { "max_port", "Maximum local UDP port", OFFSET(rtp_port_max), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MAX}, 0, 65535, DEC|ENC },
91 { "timeout", "Maximum timeout (in seconds) to wait for incoming connections. -1 is infinite. Implies flag listen", OFFSET(initial_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, DEC },
92 RTSP_REORDERING_OPTS(),
93 { NULL },
94 };
95
96 static const AVOption sdp_options[] = {
97 RTSP_FLAG_OPTS("sdp_flags", "SDP flags"),
98 { "custom_io", "Use custom IO", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_CUSTOM_IO}, 0, 0, DEC, "rtsp_flags" },
99 { "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" },
100 RTSP_MEDIATYPE_OPTS("allowed_media_types", "Media types to accept from the server"),
101 RTSP_REORDERING_OPTS(),
102 { NULL },
103 };
104
105 static const AVOption rtp_options[] = {
106 RTSP_FLAG_OPTS("rtp_flags", "RTP flags"),
107 RTSP_REORDERING_OPTS(),
108 { NULL },
109 };
110
111 static void get_word_until_chars(char *buf, int buf_size,
112 const char *sep, const char **pp)
113 {
114 const char *p;
115 char *q;
116
117 p = *pp;
118 p += strspn(p, SPACE_CHARS);
119 q = buf;
120 while (!strchr(sep, *p) && *p != '\0') {
121 if ((q - buf) < buf_size - 1)
122 *q++ = *p;
123 p++;
124 }
125 if (buf_size > 0)
126 *q = '\0';
127 *pp = p;
128 }
129
130 static void get_word_sep(char *buf, int buf_size, const char *sep,
131 const char **pp)
132 {
133 if (**pp == '/') (*pp)++;
134 get_word_until_chars(buf, buf_size, sep, pp);
135 }
136
137 static void get_word(char *buf, int buf_size, const char **pp)
138 {
139 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
140 }
141
142 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
143 * and end time.
144 * Used for seeking in the rtp stream.
145 */
146 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
147 {
148 char buf[256];
149
150 p += strspn(p, SPACE_CHARS);
151 if (!av_stristart(p, "npt=", &p))
152 return;
153
154 *start = AV_NOPTS_VALUE;
155 *end = AV_NOPTS_VALUE;
156
157 get_word_sep(buf, sizeof(buf), "-", &p);
158 av_parse_time(start, buf, 1);
159 if (*p == '-') {
160 p++;
161 get_word_sep(buf, sizeof(buf), "-", &p);
162 av_parse_time(end, buf, 1);
163 }
164 }
165
166 static int get_sockaddr(const char *buf, struct sockaddr_storage *sock)
167 {
168 struct addrinfo hints = { 0 }, *ai = NULL;
169 hints.ai_flags = AI_NUMERICHOST;
170 if (getaddrinfo(buf, NULL, &hints, &ai))
171 return -1;
172 memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
173 freeaddrinfo(ai);
174 return 0;
175 }
176
177 #if CONFIG_RTPDEC
178 static void init_rtp_handler(RTPDynamicProtocolHandler *handler,
179 RTSPStream *rtsp_st, AVCodecContext *codec)
180 {
181 if (!handler)
182 return;
183 if (codec)
184 codec->codec_id = handler->codec_id;
185 rtsp_st->dynamic_handler = handler;
186 if (handler->alloc) {
187 rtsp_st->dynamic_protocol_context = handler->alloc();
188 if (!rtsp_st->dynamic_protocol_context)
189 rtsp_st->dynamic_handler = NULL;
190 }
191 }
192
193 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
194 static int sdp_parse_rtpmap(AVFormatContext *s,
195 AVStream *st, RTSPStream *rtsp_st,
196 int payload_type, const char *p)
197 {
198 AVCodecContext *codec = st->codec;
199 char buf[256];
200 int i;
201 AVCodec *c;
202 const char *c_name;
203
204 /* See if we can handle this kind of payload.
205 * The space should normally not be there but some Real streams or
206 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
207 * have a trailing space. */
208 get_word_sep(buf, sizeof(buf), "/ ", &p);
209 if (payload_type < RTP_PT_PRIVATE) {
210 /* We are in a standard case
211 * (from http://www.iana.org/assignments/rtp-parameters). */
212 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
213 }
214
215 if (codec->codec_id == AV_CODEC_ID_NONE) {
216 RTPDynamicProtocolHandler *handler =
217 ff_rtp_handler_find_by_name(buf, codec->codec_type);
218 init_rtp_handler(handler, rtsp_st, codec);
219 /* If no dynamic handler was found, check with the list of standard
220 * allocated types, if such a stream for some reason happens to
221 * use a private payload type. This isn't handled in rtpdec.c, since
222 * the format name from the rtpmap line never is passed into rtpdec. */
223 if (!rtsp_st->dynamic_handler)
224 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
225 }
226
227 c = avcodec_find_decoder(codec->codec_id);
228 if (c && c->name)
229 c_name = c->name;
230 else
231 c_name = "(null)";
232
233 get_word_sep(buf, sizeof(buf), "/", &p);
234 i = atoi(buf);
235 switch (codec->codec_type) {
236 case AVMEDIA_TYPE_AUDIO:
237 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
238 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
239 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
240 if (i > 0) {
241 codec->sample_rate = i;
242 avpriv_set_pts_info(st, 32, 1, codec->sample_rate);
243 get_word_sep(buf, sizeof(buf), "/", &p);
244 i = atoi(buf);
245 if (i > 0)
246 codec->channels = i;
247 }
248 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
249 codec->sample_rate);
250 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
251 codec->channels);
252 break;
253 case AVMEDIA_TYPE_VIDEO:
254 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
255 if (i > 0)
256 avpriv_set_pts_info(st, 32, 1, i);
257 break;
258 default:
259 break;
260 }
261 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->init)
262 rtsp_st->dynamic_handler->init(s, st->index,
263 rtsp_st->dynamic_protocol_context);
264 return 0;
265 }
266
267 /* parse the attribute line from the fmtp a line of an sdp response. This
268 * is broken out as a function because it is used in rtp_h264.c, which is
269 * forthcoming. */
270 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
271 char *value, int value_size)
272 {
273 *p += strspn(*p, SPACE_CHARS);
274 if (**p) {
275 get_word_sep(attr, attr_size, "=", p);
276 if (**p == '=')
277 (*p)++;
278 get_word_sep(value, value_size, ";", p);
279 if (**p == ';')
280 (*p)++;
281 return 1;
282 }
283 return 0;
284 }
285
286 typedef struct SDPParseState {
287 /* SDP only */
288 struct sockaddr_storage default_ip;
289 int default_ttl;
290 int skip_media; ///< set if an unknown m= line occurs
291 int nb_default_include_source_addrs; /**< Number of source-specific multicast include source IP address (from SDP content) */
292 struct RTSPSource **default_include_source_addrs; /**< Source-specific multicast include source IP address (from SDP content) */
293 int nb_default_exclude_source_addrs; /**< Number of source-specific multicast exclude source IP address (from SDP content) */
294 struct RTSPSource **default_exclude_source_addrs; /**< Source-specific multicast exclude source IP address (from SDP content) */
295 } SDPParseState;
296
297 static void copy_default_source_addrs(struct RTSPSource **addrs, int count,
298 struct RTSPSource ***dest, int *dest_count)
299 {
300 RTSPSource *rtsp_src, *rtsp_src2;
301 int i;
302 for (i = 0; i < count; i++) {
303 rtsp_src = addrs[i];
304 rtsp_src2 = av_malloc(sizeof(*rtsp_src2));
305 if (!rtsp_src2)
306 continue;
307 memcpy(rtsp_src2, rtsp_src, sizeof(*rtsp_src));
308 dynarray_add(dest, dest_count, rtsp_src2);
309 }
310 }
311
312 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
313 int letter, const char *buf)
314 {
315 RTSPState *rt = s->priv_data;
316 char buf1[64], st_type[64];
317 const char *p;
318 enum AVMediaType codec_type;
319 int payload_type, i;
320 AVStream *st;
321 RTSPStream *rtsp_st;
322 RTSPSource *rtsp_src;
323 struct sockaddr_storage sdp_ip;
324 int ttl;
325
326 av_dlog(s, "sdp: %c='%s'\n", letter, buf);
327
328 p = buf;
329 if (s1->skip_media && letter != 'm')
330 return;
331 switch (letter) {
332 case 'c':
333 get_word(buf1, sizeof(buf1), &p);
334 if (strcmp(buf1, "IN") != 0)
335 return;
336 get_word(buf1, sizeof(buf1), &p);
337 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
338 return;
339 get_word_sep(buf1, sizeof(buf1), "/", &p);
340 if (get_sockaddr(buf1, &sdp_ip))
341 return;
342 ttl = 16;
343 if (*p == '/') {
344 p++;
345 get_word_sep(buf1, sizeof(buf1), "/", &p);
346 ttl = atoi(buf1);
347 }
348 if (s->nb_streams == 0) {
349 s1->default_ip = sdp_ip;
350 s1->default_ttl = ttl;
351 } else {
352 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
353 rtsp_st->sdp_ip = sdp_ip;
354 rtsp_st->sdp_ttl = ttl;
355 }
356 break;
357 case 's':
358 av_dict_set(&s->metadata, "title", p, 0);
359 break;
360 case 'i':
361 if (s->nb_streams == 0) {
362 av_dict_set(&s->metadata, "comment", p, 0);
363 break;
364 }
365 break;
366 case 'm':
367 /* new stream */
368 s1->skip_media = 0;
369 codec_type = AVMEDIA_TYPE_UNKNOWN;
370 get_word(st_type, sizeof(st_type), &p);
371 if (!strcmp(st_type, "audio")) {
372 codec_type = AVMEDIA_TYPE_AUDIO;
373 } else if (!strcmp(st_type, "video")) {
374 codec_type = AVMEDIA_TYPE_VIDEO;
375 } else if (!strcmp(st_type, "application")) {
376 codec_type = AVMEDIA_TYPE_DATA;
377 }
378 if (codec_type == AVMEDIA_TYPE_UNKNOWN || !(rt->media_type_mask & (1 << codec_type))) {
379 s1->skip_media = 1;
380 return;
381 }
382 rtsp_st = av_mallocz(sizeof(RTSPStream));
383 if (!rtsp_st)
384 return;
385 rtsp_st->stream_index = -1;
386 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
387
388 rtsp_st->sdp_ip = s1->default_ip;
389 rtsp_st->sdp_ttl = s1->default_ttl;
390
391 copy_default_source_addrs(s1->default_include_source_addrs,
392 s1->nb_default_include_source_addrs,
393 &rtsp_st->include_source_addrs,
394 &rtsp_st->nb_include_source_addrs);
395 copy_default_source_addrs(s1->default_exclude_source_addrs,
396 s1->nb_default_exclude_source_addrs,
397 &rtsp_st->exclude_source_addrs,
398 &rtsp_st->nb_exclude_source_addrs);
399
400 get_word(buf1, sizeof(buf1), &p); /* port */
401 rtsp_st->sdp_port = atoi(buf1);
402
403 get_word(buf1, sizeof(buf1), &p); /* protocol */
404 if (!strcmp(buf1, "udp"))
405 rt->transport = RTSP_TRANSPORT_RAW;
406 else if (strstr(buf1, "/AVPF") || strstr(buf1, "/SAVPF"))
407 rtsp_st->feedback = 1;
408
409 /* XXX: handle list of formats */
410 get_word(buf1, sizeof(buf1), &p); /* format list */
411 rtsp_st->sdp_payload_type = atoi(buf1);
412
413 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
414 /* no corresponding stream */
415 if (rt->transport == RTSP_TRANSPORT_RAW) {
416 if (!rt->ts && CONFIG_RTPDEC)
417 rt->ts = ff_mpegts_parse_open(s);
418 } else {
419 RTPDynamicProtocolHandler *handler;
420 handler = ff_rtp_handler_find_by_id(
421 rtsp_st->sdp_payload_type, AVMEDIA_TYPE_DATA);
422 init_rtp_handler(handler, rtsp_st, NULL);
423 if (handler && handler->init)
424 handler->init(s, -1, rtsp_st->dynamic_protocol_context);
425 }
426 } else if (rt->server_type == RTSP_SERVER_WMS &&
427 codec_type == AVMEDIA_TYPE_DATA) {
428 /* RTX stream, a stream that carries all the other actual
429 * audio/video streams. Don't expose this to the callers. */
430 } else {
431 st = avformat_new_stream(s, NULL);
432 if (!st)
433 return;
434 st->id = rt->nb_rtsp_streams - 1;
435 rtsp_st->stream_index = st->index;
436 st->codec->codec_type = codec_type;
437 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
438 RTPDynamicProtocolHandler *handler;
439 /* if standard payload type, we can find the codec right now */
440 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
441 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
442 st->codec->sample_rate > 0)
443 avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate);
444 /* Even static payload types may need a custom depacketizer */
445 handler = ff_rtp_handler_find_by_id(
446 rtsp_st->sdp_payload_type, st->codec->codec_type);
447 init_rtp_handler(handler, rtsp_st, st->codec);
448 if (handler && handler->init)
449 handler->init(s, st->index,
450 rtsp_st->dynamic_protocol_context);
451 }
452 }
453 /* put a default control url */
454 av_strlcpy(rtsp_st->control_url, rt->control_uri,
455 sizeof(rtsp_st->control_url));
456 break;
457 case 'a':
458 if (av_strstart(p, "control:", &p)) {
459 if (s->nb_streams == 0) {
460 if (!strncmp(p, "rtsp://", 7))
461 av_strlcpy(rt->control_uri, p,
462 sizeof(rt->control_uri));
463 } else {
464 char proto[32];
465 /* get the control url */
466 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
467
468 /* XXX: may need to add full url resolution */
469 av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
470 NULL, NULL, 0, p);
471 if (proto[0] == '\0') {
472 /* relative control URL */
473 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
474 av_strlcat(rtsp_st->control_url, "/",
475 sizeof(rtsp_st->control_url));
476 av_strlcat(rtsp_st->control_url, p,
477 sizeof(rtsp_st->control_url));
478 } else
479 av_strlcpy(rtsp_st->control_url, p,
480 sizeof(rtsp_st->control_url));
481 }
482 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
483 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
484 get_word(buf1, sizeof(buf1), &p);
485 payload_type = atoi(buf1);
486 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
487 if (rtsp_st->stream_index >= 0) {
488 st = s->streams[rtsp_st->stream_index];
489 sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
490 }
491 } else if (av_strstart(p, "fmtp:", &p) ||
492 av_strstart(p, "framesize:", &p)) {
493 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
494 // let dynamic protocol handlers have a stab at the line.
495 get_word(buf1, sizeof(buf1), &p);
496 payload_type = atoi(buf1);
497 for (i = 0; i < rt->nb_rtsp_streams; i++) {
498 rtsp_st = rt->rtsp_streams[i];
499 if (rtsp_st->sdp_payload_type == payload_type &&
500 rtsp_st->dynamic_handler &&
501 rtsp_st->dynamic_handler->parse_sdp_a_line)
502 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
503 rtsp_st->dynamic_protocol_context, buf);
504 }
505 } else if (av_strstart(p, "range:", &p)) {
506 int64_t start, end;
507
508 // this is so that seeking on a streamed file can work.
509 rtsp_parse_range_npt(p, &start, &end);
510 s->start_time = start;
511 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
512 s->duration = (end == AV_NOPTS_VALUE) ?
513 AV_NOPTS_VALUE : end - start;
514 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
515 if (atoi(p) == 1)
516 rt->transport = RTSP_TRANSPORT_RDT;
517 } else if (av_strstart(p, "SampleRate:integer;", &p) &&
518 s->nb_streams > 0) {
519 st = s->streams[s->nb_streams - 1];
520 st->codec->sample_rate = atoi(p);
521 } else if (av_strstart(p, "crypto:", &p) && s->nb_streams > 0) {
522 // RFC 4568
523 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
524 get_word(buf1, sizeof(buf1), &p); // ignore tag
525 get_word(rtsp_st->crypto_suite, sizeof(rtsp_st->crypto_suite), &p);
526 p += strspn(p, SPACE_CHARS);
527 if (av_strstart(p, "inline:", &p))
528 get_word(rtsp_st->crypto_params, sizeof(rtsp_st->crypto_params), &p);
529 } else if (av_strstart(p, "source-filter:", &p)) {
530 int exclude = 0;
531 get_word(buf1, sizeof(buf1), &p);
532 if (strcmp(buf1, "incl") && strcmp(buf1, "excl"))
533 return;
534 exclude = !strcmp(buf1, "excl");
535
536 get_word(buf1, sizeof(buf1), &p);
537 if (strcmp(buf1, "IN") != 0)
538 return;
539 get_word(buf1, sizeof(buf1), &p);
540 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6") && strcmp(buf1, "*"))
541 return;
542 // not checking that the destination address actually matches or is wildcard
543 get_word(buf1, sizeof(buf1), &p);
544
545 while (*p != '\0') {
546 rtsp_src = av_mallocz(sizeof(*rtsp_src));
547 if (!rtsp_src)
548 return;
549 get_word(rtsp_src->addr, sizeof(rtsp_src->addr), &p);
550 if (exclude) {
551 if (s->nb_streams == 0) {
552 dynarray_add(&s1->default_exclude_source_addrs, &s1->nb_default_exclude_source_addrs, rtsp_src);
553 } else {
554 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
555 dynarray_add(&rtsp_st->exclude_source_addrs, &rtsp_st->nb_exclude_source_addrs, rtsp_src);
556 }
557 } else {
558 if (s->nb_streams == 0) {
559 dynarray_add(&s1->default_include_source_addrs, &s1->nb_default_include_source_addrs, rtsp_src);
560 } else {
561 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
562 dynarray_add(&rtsp_st->include_source_addrs, &rtsp_st->nb_include_source_addrs, rtsp_src);
563 }
564 }
565 }
566 } else {
567 if (rt->server_type == RTSP_SERVER_WMS)
568 ff_wms_parse_sdp_a_line(s, p);
569 if (s->nb_streams > 0) {
570 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
571
572 if (rt->server_type == RTSP_SERVER_REAL)
573 ff_real_parse_sdp_a_line(s, rtsp_st->stream_index, p);
574
575 if (rtsp_st->dynamic_handler &&
576 rtsp_st->dynamic_handler->parse_sdp_a_line)
577 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
578 rtsp_st->stream_index,
579 rtsp_st->dynamic_protocol_context, buf);
580 }
581 }
582 break;
583 }
584 }
585
586 int ff_sdp_parse(AVFormatContext *s, const char *content)
587 {
588 RTSPState *rt = s->priv_data;
589 const char *p;
590 int letter, i;
591 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
592 * contain long SDP lines containing complete ASF Headers (several
593 * kB) or arrays of MDPR (RM stream descriptor) headers plus
594 * "rulebooks" describing their properties. Therefore, the SDP line
595 * buffer is large.
596 *
597 * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
598 * in rtpdec_xiph.c. */
599 char buf[16384], *q;
600 SDPParseState sdp_parse_state = { { 0 } }, *s1 = &sdp_parse_state;
601
602 p = content;
603 for (;;) {
604 p += strspn(p, SPACE_CHARS);
605 letter = *p;
606 if (letter == '\0')
607 break;
608 p++;
609 if (*p != '=')
610 goto next_line;
611 p++;
612 /* get the content */
613 q = buf;
614 while (*p != '\n' && *p != '\r' && *p != '\0') {
615 if ((q - buf) < sizeof(buf) - 1)
616 *q++ = *p;
617 p++;
618 }
619 *q = '\0';
620 sdp_parse_line(s, s1, letter, buf);
621 next_line:
622 while (*p != '\n' && *p != '\0')
623 p++;
624 if (*p == '\n')
625 p++;
626 }
627
628 for (i = 0; i < s1->nb_default_include_source_addrs; i++)
629 av_free(s1->default_include_source_addrs[i]);
630 av_freep(&s1->default_include_source_addrs);
631 for (i = 0; i < s1->nb_default_exclude_source_addrs; i++)
632 av_free(s1->default_exclude_source_addrs[i]);
633 av_freep(&s1->default_exclude_source_addrs);
634
635 rt->p = av_malloc(sizeof(struct pollfd)*2*(rt->nb_rtsp_streams+1));
636 if (!rt->p) return AVERROR(ENOMEM);
637 return 0;
638 }
639 #endif /* CONFIG_RTPDEC */
640
641 void ff_rtsp_undo_setup(AVFormatContext *s)
642 {
643 RTSPState *rt = s->priv_data;
644 int i;
645
646 for (i = 0; i < rt->nb_rtsp_streams; i++) {
647 RTSPStream *rtsp_st = rt->rtsp_streams[i];
648 if (!rtsp_st)
649 continue;
650 if (rtsp_st->transport_priv) {
651 if (s->oformat) {
652 AVFormatContext *rtpctx = rtsp_st->transport_priv;
653 av_write_trailer(rtpctx);
654 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
655 uint8_t *ptr;
656 avio_close_dyn_buf(rtpctx->pb, &ptr);
657 av_free(ptr);
658 } else {
659 avio_close(rtpctx->pb);
660 }
661 avformat_free_context(rtpctx);
662 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
663 ff_rdt_parse_close(rtsp_st->transport_priv);
664 else if (rt->transport == RTSP_TRANSPORT_RTP && CONFIG_RTPDEC)
665 ff_rtp_parse_close(rtsp_st->transport_priv);
666 }
667 rtsp_st->transport_priv = NULL;
668 if (rtsp_st->rtp_handle)
669 ffurl_close(rtsp_st->rtp_handle);
670 rtsp_st->rtp_handle = NULL;
671 }
672 }
673
674 /* close and free RTSP streams */
675 void ff_rtsp_close_streams(AVFormatContext *s)
676 {
677 RTSPState *rt = s->priv_data;
678 int i, j;
679 RTSPStream *rtsp_st;
680
681 ff_rtsp_undo_setup(s);
682 for (i = 0; i < rt->nb_rtsp_streams; i++) {
683 rtsp_st = rt->rtsp_streams[i];
684 if (rtsp_st) {
685 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
686 rtsp_st->dynamic_handler->free(
687 rtsp_st->dynamic_protocol_context);
688 for (j = 0; j < rtsp_st->nb_include_source_addrs; j++)
689 av_free(rtsp_st->include_source_addrs[j]);
690 av_freep(&rtsp_st->include_source_addrs);
691 for (j = 0; j < rtsp_st->nb_exclude_source_addrs; j++)
692 av_free(rtsp_st->exclude_source_addrs[j]);
693 av_freep(&rtsp_st->exclude_source_addrs);
694
695 av_free(rtsp_st);
696 }
697 }
698 av_free(rt->rtsp_streams);
699 if (rt->asf_ctx) {
700 avformat_close_input(&rt->asf_ctx);
701 }
702 if (rt->ts && CONFIG_RTPDEC)
703 ff_mpegts_parse_close(rt->ts);
704 av_free(rt->p);
705 av_free(rt->recvbuf);
706 }
707
708 int ff_rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
709 {
710 RTSPState *rt = s->priv_data;
711 AVStream *st = NULL;
712 int reordering_queue_size = rt->reordering_queue_size;
713 if (reordering_queue_size < 0) {
714 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
715 reordering_queue_size = 0;
716 else
717 reordering_queue_size = RTP_REORDER_QUEUE_DEFAULT_SIZE;
718 }
719
720 /* open the RTP context */
721 if (rtsp_st->stream_index >= 0)
722 st = s->streams[rtsp_st->stream_index];
723 if (!st)
724 s->ctx_flags |= AVFMTCTX_NOHEADER;
725
726 if (s->oformat && CONFIG_RTSP_MUXER) {
727 int ret = ff_rtp_chain_mux_open(&rtsp_st->transport_priv, s, st,
728 rtsp_st->rtp_handle,
729 RTSP_TCP_MAX_PACKET_SIZE,
730 rtsp_st->stream_index);
731 /* Ownership of rtp_handle is passed to the rtp mux context */
732 rtsp_st->rtp_handle = NULL;
733 if (ret < 0)
734 return ret;
735 } else if (rt->transport == RTSP_TRANSPORT_RAW) {
736 return 0; // Don't need to open any parser here
737 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
738 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
739 rtsp_st->dynamic_protocol_context,
740 rtsp_st->dynamic_handler);
741 else if (CONFIG_RTPDEC)
742 rtsp_st->transport_priv = ff_rtp_parse_open(s, st,
743 rtsp_st->sdp_payload_type,
744 reordering_queue_size);
745
746 if (!rtsp_st->transport_priv) {
747 return AVERROR(ENOMEM);
748 } else if (rt->transport == RTSP_TRANSPORT_RTP && CONFIG_RTPDEC) {
749 if (rtsp_st->dynamic_handler) {
750 ff_rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
751 rtsp_st->dynamic_protocol_context,
752 rtsp_st->dynamic_handler);
753 }
754 if (rtsp_st->crypto_suite[0])
755 ff_rtp_parse_set_crypto(rtsp_st->transport_priv,
756 rtsp_st->crypto_suite,
757 rtsp_st->crypto_params);
758 }
759
760 return 0;
761 }
762
763 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
764 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
765 {
766 const char *q;
767 char *p;
768 int v;
769
770 q = *pp;
771 q += strspn(q, SPACE_CHARS);
772 v = strtol(q, &p, 10);
773 if (*p == '-') {
774 p++;
775 *min_ptr = v;
776 v = strtol(p, &p, 10);
777 *max_ptr = v;
778 } else {
779 *min_ptr = v;
780 *max_ptr = v;
781 }
782 *pp = p;
783 }
784
785 /* XXX: only one transport specification is parsed */
786 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
787 {
788 char transport_protocol[16];
789 char profile[16];
790 char lower_transport[16];
791 char parameter[16];
792 RTSPTransportField *th;
793 char buf[256];
794
795 reply->nb_transports = 0;
796
797 for (;;) {
798 p += strspn(p, SPACE_CHARS);
799 if (*p == '\0')
800 break;
801
802 th = &reply->transports[reply->nb_transports];
803
804 get_word_sep(transport_protocol, sizeof(transport_protocol),
805 "/", &p);
806 if (!av_strcasecmp (transport_protocol, "rtp")) {
807 get_word_sep(profile, sizeof(profile), "/;,", &p);
808 lower_transport[0] = '\0';
809 /* rtp/avp/<protocol> */
810 if (*p == '/') {
811 get_word_sep(lower_transport, sizeof(lower_transport),
812 ";,", &p);
813 }
814 th->transport = RTSP_TRANSPORT_RTP;
815 } else if (!av_strcasecmp (transport_protocol, "x-pn-tng") ||
816 !av_strcasecmp (transport_protocol, "x-real-rdt")) {
817 /* x-pn-tng/<protocol> */
818 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
819 profile[0] = '\0';
820 th->transport = RTSP_TRANSPORT_RDT;
821 } else if (!av_strcasecmp(transport_protocol, "raw")) {
822 get_word_sep(profile, sizeof(profile), "/;,", &p);
823 lower_transport[0] = '\0';
824 /* raw/raw/<protocol> */
825 if (*p == '/') {
826 get_word_sep(lower_transport, sizeof(lower_transport),
827 ";,", &p);
828 }
829 th->transport = RTSP_TRANSPORT_RAW;
830 }
831 if (!av_strcasecmp(lower_transport, "TCP"))
832 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
833 else
834 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
835
836 if (*p == ';')
837 p++;
838 /* get each parameter */
839 while (*p != '\0' && *p != ',') {
840 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
841 if (!strcmp(parameter, "port")) {
842 if (*p == '=') {
843 p++;
844 rtsp_parse_range(&th->port_min, &th->port_max, &p);
845 }
846 } else if (!strcmp(parameter, "client_port")) {
847 if (*p == '=') {
848 p++;
849 rtsp_parse_range(&th->client_port_min,
850 &th->client_port_max, &p);
851 }
852 } else if (!strcmp(parameter, "server_port")) {
853 if (*p == '=') {
854 p++;
855 rtsp_parse_range(&th->server_port_min,
856 &th->server_port_max, &p);
857 }
858 } else if (!strcmp(parameter, "interleaved")) {
859 if (*p == '=') {
860 p++;
861 rtsp_parse_range(&th->interleaved_min,
862 &th->interleaved_max, &p);
863 }
864 } else if (!strcmp(parameter, "multicast")) {
865 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
866 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
867 } else if (!strcmp(parameter, "ttl")) {
868 if (*p == '=') {
869 char *end;
870 p++;
871 th->ttl = strtol(p, &end, 10);
872 p = end;
873 }
874 } else if (!strcmp(parameter, "destination")) {
875 if (*p == '=') {
876 p++;
877 get_word_sep(buf, sizeof(buf), ";,", &p);
878 get_sockaddr(buf, &th->destination);
879 }
880 } else if (!strcmp(parameter, "source")) {
881 if (*p == '=') {
882 p++;
883 get_word_sep(buf, sizeof(buf), ";,", &p);
884 av_strlcpy(th->source, buf, sizeof(th->source));
885 }
886 } else if (!strcmp(parameter, "mode")) {
887 if (*p == '=') {
888 p++;
889 get_word_sep(buf, sizeof(buf), ";, ", &p);
890 if (!strcmp(buf, "record") ||
891 !strcmp(buf, "receive"))
892 th->mode_record = 1;
893 }
894 }
895
896 while (*p != ';' && *p != '\0' && *p != ',')
897 p++;
898 if (*p == ';')
899 p++;
900 }
901 if (*p == ',')
902 p++;
903
904 reply->nb_transports++;
905 }
906 }
907
908 static void handle_rtp_info(RTSPState *rt, const char *url,
909 uint32_t seq, uint32_t rtptime)
910 {
911 int i;
912 if (!rtptime || !url[0])
913 return;
914 if (rt->transport != RTSP_TRANSPORT_RTP)
915 return;
916 for (i = 0; i < rt->nb_rtsp_streams; i++) {
917 RTSPStream *rtsp_st = rt->rtsp_streams[i];
918 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
919 if (!rtpctx)
920 continue;
921 if (!strcmp(rtsp_st->control_url, url)) {
922 rtpctx->base_timestamp = rtptime;
923 break;
924 }
925 }
926 }
927
928 static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
929 {
930 int read = 0;
931 char key[20], value[1024], url[1024] = "";
932 uint32_t seq = 0, rtptime = 0;
933
934 for (;;) {
935 p += strspn(p, SPACE_CHARS);
936 if (!*p)
937 break;
938 get_word_sep(key, sizeof(key), "=", &p);
939 if (*p != '=')
940 break;
941 p++;
942 get_word_sep(value, sizeof(value), ";, ", &p);
943 read++;
944 if (!strcmp(key, "url"))
945 av_strlcpy(url, value, sizeof(url));
946 else if (!strcmp(key, "seq"))
947 seq = strtoul(value, NULL, 10);
948 else if (!strcmp(key, "rtptime"))
949 rtptime = strtoul(value, NULL, 10);
950 if (*p == ',') {
951 handle_rtp_info(rt, url, seq, rtptime);
952 url[0] = '\0';
953 seq = rtptime = 0;
954 read = 0;
955 }
956 if (*p)
957 p++;
958 }
959 if (read > 0)
960 handle_rtp_info(rt, url, seq, rtptime);
961 }
962
963 void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
964 RTSPState *rt, const char *method)
965 {
966 const char *p;
967
968 /* NOTE: we do case independent match for broken servers */
969 p = buf;
970 if (av_stristart(p, "Session:", &p)) {
971 int t;
972 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
973 if (av_stristart(p, ";timeout=", &p) &&
974 (t = strtol(p, NULL, 10)) > 0) {
975 reply->timeout = t;
976 }
977 } else if (av_stristart(p, "Content-Length:", &p)) {
978 reply->content_length = strtol(p, NULL, 10);
979 } else if (av_stristart(p, "Transport:", &p)) {
980 rtsp_parse_transport(reply, p);
981 } else if (av_stristart(p, "CSeq:", &p)) {
982 reply->seq = strtol(p, NULL, 10);
983 } else if (av_stristart(p, "Range:", &p)) {
984 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
985 } else if (av_stristart(p, "RealChallenge1:", &p)) {
986 p += strspn(p, SPACE_CHARS);
987 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
988 } else if (av_stristart(p, "Server:", &p)) {
989 p += strspn(p, SPACE_CHARS);
990 av_strlcpy(reply->server, p, sizeof(reply->server));
991 } else if (av_stristart(p, "Notice:", &p) ||
992 av_stristart(p, "X-Notice:", &p)) {
993 reply->notice = strtol(p, NULL, 10);
994 } else if (av_stristart(p, "Location:", &p)) {
995 p += strspn(p, SPACE_CHARS);
996 av_strlcpy(reply->location, p , sizeof(reply->location));
997 } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
998 p += strspn(p, SPACE_CHARS);
999 ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
1000 } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
1001 p += strspn(p, SPACE_CHARS);
1002 ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
1003 } else if (av_stristart(p, "Content-Base:", &p) && rt) {
1004 p += strspn(p, SPACE_CHARS);
1005 if (method && !strcmp(method, "DESCRIBE"))
1006 av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
1007 } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
1008 p += strspn(p, SPACE_CHARS);
1009 if (method && !strcmp(method, "PLAY"))
1010 rtsp_parse_rtp_info(rt, p);
1011 } else if (av_stristart(p, "Public:", &p) && rt) {
1012 if (strstr(p, "GET_PARAMETER") &&
1013 method && !strcmp(method, "OPTIONS"))
1014 rt->get_parameter_supported = 1;
1015 } else if (av_stristart(p, "x-Accept-Dynamic-Rate:", &p) && rt) {
1016 p += strspn(p, SPACE_CHARS);
1017 rt->accept_dynamic_rate = atoi(p);
1018 } else if (av_stristart(p, "Content-Type:", &p)) {
1019 p += strspn(p, SPACE_CHARS);
1020 av_strlcpy(reply->content_type, p, sizeof(reply->content_type));
1021 }
1022 }
1023
1024 /* skip a RTP/TCP interleaved packet */
1025 void ff_rtsp_skip_packet(AVFormatContext *s)
1026 {
1027 RTSPState *rt = s->priv_data;
1028 int ret, len, len1;
1029 uint8_t buf[1024];
1030
1031 ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
1032 if (ret != 3)
1033 return;
1034 len = AV_RB16(buf + 1);
1035
1036 av_dlog(s, "skipping RTP packet len=%d\n", len);
1037
1038 /* skip payload */
1039 while (len > 0) {
1040 len1 = len;
1041 if (len1 > sizeof(buf))
1042 len1 = sizeof(buf);
1043 ret = ffurl_read_complete(rt->rtsp_hd, buf, len1);
1044 if (ret != len1)
1045 return;
1046 len -= len1;
1047 }
1048 }
1049
1050 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
1051 unsigned char **content_ptr,
1052 int return_on_interleaved_data, const char *method)
1053 {
1054 RTSPState *rt = s->priv_data;
1055 char buf[4096], buf1[1024], *q;
1056 unsigned char ch;
1057 const char *p;
1058 int ret, content_length, line_count = 0, request = 0;
1059 unsigned char *content = NULL;
1060
1061 start:
1062 line_count = 0;
1063 request = 0;
1064 content = NULL;
1065 memset(reply, 0, sizeof(*reply));
1066
1067 /* parse reply (XXX: use buffers) */
1068 rt->last_reply[0] = '\0';
1069 for (;;) {
1070 q = buf;
1071 for (;;) {
1072 ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1);
1073 av_dlog(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
1074 if (ret != 1)
1075 return AVERROR_EOF;
1076 if (ch == '\n')
1077 break;
1078 if (ch == '$') {
1079 /* XXX: only parse it if first char on line ? */
1080 if (return_on_interleaved_data) {
1081 return 1;
1082 } else
1083 ff_rtsp_skip_packet(s);
1084 } else if (ch != '\r') {
1085 if ((q - buf) < sizeof(buf) - 1)
1086 *q++ = ch;
1087 }
1088 }
1089 *q = '\0';
1090
1091 av_dlog(s, "line='%s'\n", buf);
1092
1093 /* test if last line */
1094 if (buf[0] == '\0')
1095 break;
1096 p = buf;
1097 if (line_count == 0) {
1098 /* get reply code */
1099 get_word(buf1, sizeof(buf1), &p);
1100 if (!strncmp(buf1, "RTSP/", 5)) {
1101 get_word(buf1, sizeof(buf1), &p);
1102 reply->status_code = atoi(buf1);
1103 av_strlcpy(reply->reason, p, sizeof(reply->reason));
1104 } else {
1105 av_strlcpy(reply->reason, buf1, sizeof(reply->reason)); // method
1106 get_word(buf1, sizeof(buf1), &p); // object
1107 request = 1;
1108 }
1109 } else {
1110 ff_rtsp_parse_line(reply, p, rt, method);
1111 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
1112 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1113 }
1114 line_count++;
1115 }
1116
1117 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0' && !request)
1118 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
1119
1120 content_length = reply->content_length;
1121 if (content_length > 0) {
1122 /* leave some room for a trailing '\0' (useful for simple parsing) */
1123 content = av_malloc(content_length + 1);
1124 ffurl_read_complete(rt->rtsp_hd, content, content_length);
1125 content[content_length] = '\0';
1126 }
1127 if (content_ptr)
1128 *content_ptr = content;
1129 else
1130 av_free(content);
1131
1132 if (request) {
1133 char buf[1024];
1134 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1135 const char* ptr = buf;
1136
1137 if (!strcmp(reply->reason, "OPTIONS")) {
1138 snprintf(buf, sizeof(buf), "RTSP/1.0 200 OK\r\n");
1139 if (reply->seq)
1140 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", reply->seq);
1141 if (reply->session_id[0])
1142 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n",
1143 reply->session_id);
1144 } else {
1145 snprintf(buf, sizeof(buf), "RTSP/1.0 501 Not Implemented\r\n");
1146 }
1147 av_strlcat(buf, "\r\n", sizeof(buf));
1148
1149 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1150 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1151 ptr = base64buf;
1152 }
1153 ffurl_write(rt->rtsp_hd_out, ptr, strlen(ptr));
1154
1155 rt->last_cmd_time = av_gettime();
1156 /* Even if the request from the server had data, it is not the data
1157 * that the caller wants or expects. The memory could also be leaked
1158 * if the actual following reply has content data. */
1159 if (content_ptr)
1160 av_freep(content_ptr);
1161 /* If method is set, this is called from ff_rtsp_send_cmd,
1162 * where a reply to exactly this request is awaited. For
1163 * callers from within packet receiving, we just want to
1164 * return to the caller and go back to receiving packets. */
1165 if (method)
1166 goto start;
1167 return 0;
1168 }
1169
1170 if (rt->seq != reply->seq) {
1171 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
1172 rt->seq, reply->seq);
1173 }
1174
1175 /* EOS */
1176 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
1177 reply->notice == 2104 /* Start-of-Stream Reached */ ||
1178 reply->notice == 2306 /* Continuous Feed Terminated */) {
1179 rt->state = RTSP_STATE_IDLE;
1180 } else if (reply->notice >= 4400 && reply->notice < 5500) {
1181 return AVERROR(EIO); /* data or server error */
1182 } else if (reply->notice == 2401 /* Ticket Expired */ ||
1183 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
1184 return AVERROR(EPERM);
1185
1186 return 0;
1187 }
1188
1189 /**
1190 * Send a command to the RTSP server without waiting for the reply.
1191 *
1192 * @param s RTSP (de)muxer context
1193 * @param method the method for the request
1194 * @param url the target url for the request
1195 * @param headers extra header lines to include in the request
1196 * @param send_content if non-null, the data to send as request body content
1197 * @param send_content_length the length of the send_content data, or 0 if
1198 * send_content is null
1199 *
1200 * @return zero if success, nonzero otherwise
1201 */
1202 static int rtsp_send_cmd_with_content_async(AVFormatContext *s,
1203 const char *method, const char *url,
1204 const char *headers,
1205 const unsigned char *send_content,
1206 int send_content_length)
1207 {
1208 RTSPState *rt = s->priv_data;
1209 char buf[4096], *out_buf;
1210 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1211
1212 /* Add in RTSP headers */
1213 out_buf = buf;
1214 rt->seq++;
1215 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
1216 if (headers)
1217 av_strlcat(buf, headers, sizeof(buf));
1218 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
1219 av_strlcatf(buf, sizeof(buf), "User-Agent: %s\r\n", LIBAVFORMAT_IDENT);
1220 if (rt->session_id[0] != '\0' && (!headers ||
1221 !strstr(headers, "\nIf-Match:"))) {
1222 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
1223 }
1224 if (rt->auth[0]) {
1225 char *str = ff_http_auth_create_response(&rt->auth_state,
1226 rt->auth, url, method);
1227 if (str)
1228 av_strlcat(buf, str, sizeof(buf));
1229 av_free(str);
1230 }
1231 if (send_content_length > 0 && send_content)
1232 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
1233 av_strlcat(buf, "\r\n", sizeof(buf));
1234
1235 /* base64 encode rtsp if tunneling */
1236 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1237 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1238 out_buf = base64buf;
1239 }
1240
1241 av_dlog(s, "Sending:\n%s--\n", buf);
1242
1243 ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
1244 if (send_content_length > 0 && send_content) {
1245 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1246 av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
1247 "with content data not supported\n");
1248 return AVERROR_PATCHWELCOME;
1249 }
1250 ffurl_write(rt->rtsp_hd_out, send_content, send_content_length);
1251 }
1252 rt->last_cmd_time = av_gettime();
1253
1254 return 0;
1255 }
1256
1257 int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1258 const char *url, const char *headers)
1259 {
1260 return rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1261 }
1262
1263 int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1264 const char *headers, RTSPMessageHeader *reply,
1265 unsigned char **content_ptr)
1266 {
1267 return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1268 content_ptr, NULL, 0);
1269 }
1270
1271 int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1272 const char *method, const char *url,
1273 const char *header,
1274 RTSPMessageHeader *reply,
1275 unsigned char **content_ptr,
1276 const unsigned char *send_content,
1277 int send_content_length)
1278 {
1279 RTSPState *rt = s->priv_data;
1280 HTTPAuthType cur_auth_type;
1281 int ret, attempts = 0;
1282
1283 retry:
1284 cur_auth_type = rt->auth_state.auth_type;
1285 if ((ret = rtsp_send_cmd_with_content_async(s, method, url, header,
1286 send_content,
1287 send_content_length)))
1288 return ret;
1289
1290 if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1291 return ret;
1292 attempts++;
1293
1294 if (reply->status_code == 401 &&
1295 (cur_auth_type == HTTP_AUTH_NONE || rt->auth_state.stale) &&
1296 rt->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2)
1297 goto retry;
1298
1299 if (reply->status_code > 400){
1300 av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1301 method,
1302 reply->status_code,
1303 reply->reason);
1304 av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1305 }
1306
1307 return 0;
1308 }
1309
1310 int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1311 int lower_transport, const char *real_challenge)
1312 {
1313 RTSPState *rt = s->priv_data;
1314 int rtx = 0, j, i, err, interleave = 0, port_off;
1315 RTSPStream *rtsp_st;
1316 RTSPMessageHeader reply1, *reply = &reply1;
1317 char cmd[2048];
1318 const char *trans_pref;
1319
1320 if (rt->transport == RTSP_TRANSPORT_RDT)
1321 trans_pref = "x-pn-tng";
1322 else if (rt->transport == RTSP_TRANSPORT_RAW)
1323 trans_pref = "RAW/RAW";
1324 else
1325 trans_pref = "RTP/AVP";
1326
1327 /* default timeout: 1 minute */
1328 rt->timeout = 60;
1329
1330 /* for each stream, make the setup request */
1331 /* XXX: we assume the same server is used for the control of each
1332 * RTSP stream */
1333
1334 /* Choose a random starting offset within the first half of the
1335 * port range, to allow for a number of ports to try even if the offset
1336 * happens to be at the end of the random range. */
1337 port_off = av_get_random_seed() % ((rt->rtp_port_max - rt->rtp_port_min)/2);
1338 /* even random offset */
1339 port_off -= port_off & 0x01;
1340
1341 for (j = rt->rtp_port_min + port_off, i = 0; i < rt->nb_rtsp_streams; ++i) {
1342 char transport[2048];
1343
1344 /*
1345 * WMS serves all UDP data over a single connection, the RTX, which
1346 * isn't necessarily the first in the SDP but has to be the first
1347 * to be set up, else the second/third SETUP will fail with a 461.
1348 */
1349 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1350 rt->server_type == RTSP_SERVER_WMS) {
1351 if (i == 0) {
1352 /* rtx first */
1353 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1354 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1355 if (len >= 4 &&
1356 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1357 "/rtx"))
1358 break;
1359 }
1360 if (rtx == rt->nb_rtsp_streams)
1361 return -1; /* no RTX found */
1362 rtsp_st = rt->rtsp_streams[rtx];
1363 } else
1364 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1365 } else
1366 rtsp_st = rt->rtsp_streams[i];
1367
1368 /* RTP/UDP */
1369 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1370 char buf[256];
1371
1372 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1373 port = reply->transports[0].client_port_min;
1374 goto have_port;
1375 }
1376
1377 /* first try in specified port range */
1378 while (j <= rt->rtp_port_max) {
1379 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1380 "?localport=%d", j);
1381 /* we will use two ports per rtp stream (rtp and rtcp) */
1382 j += 2;
1383 if (!ffurl_open(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE,
1384 &s->interrupt_callback, NULL))
1385 goto rtp_opened;
1386 }
1387
1388 av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1389 err = AVERROR(EIO);
1390 goto fail;
1391
1392 rtp_opened:
1393 port = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1394 have_port:
1395 snprintf(transport, sizeof(transport) - 1,
1396 "%s/UDP;", trans_pref);
1397 if (rt->server_type != RTSP_SERVER_REAL)
1398 av_strlcat(transport, "unicast;", sizeof(transport));
1399 av_strlcatf(transport, sizeof(transport),
1400 "client_port=%d", port);
1401 if (rt->transport == RTSP_TRANSPORT_RTP &&
1402 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1403 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1404 }
1405
1406 /* RTP/TCP */
1407 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1408 /* For WMS streams, the application streams are only used for
1409 * UDP. When trying to set it up for TCP streams, the server
1410 * will return an error. Therefore, we skip those streams. */
1411 if (rt->server_type == RTSP_SERVER_WMS &&
1412 (rtsp_st->stream_index < 0 ||
1413 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1414 AVMEDIA_TYPE_DATA))
1415 continue;
1416 snprintf(transport, sizeof(transport) - 1,
1417 "%s/TCP;", trans_pref);
1418 if (rt->transport != RTSP_TRANSPORT_RDT)
1419 av_strlcat(transport, "unicast;", sizeof(transport));
1420 av_strlcatf(transport, sizeof(transport),
1421 "interleaved=%d-%d",
1422 interleave, interleave + 1);
1423 interleave += 2;
1424 }
1425
1426 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1427 snprintf(transport, sizeof(transport) - 1,
1428 "%s/UDP;multicast", trans_pref);
1429 }
1430 if (s->oformat) {
1431 av_strlcat(transport, ";mode=record", sizeof(transport));
1432 } else if (rt->server_type == RTSP_SERVER_REAL ||
1433 rt->server_type == RTSP_SERVER_WMS)
1434 av_strlcat(transport, ";mode=play", sizeof(transport));
1435 snprintf(cmd, sizeof(cmd),
1436 "Transport: %s\r\n",
1437 transport);
1438 if (rt->accept_dynamic_rate)
1439 av_strlcat(cmd, "x-Dynamic-Rate: 0\r\n", sizeof(cmd));
1440 if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1441 char real_res[41], real_csum[9];
1442 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1443 real_challenge);
1444 av_strlcatf(cmd, sizeof(cmd),
1445 "If-Match: %s\r\n"
1446 "RealChallenge2: %s, sd=%s\r\n",
1447 rt->session_id, real_res, real_csum);
1448 }
1449 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1450 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1451 err = 1;
1452 goto fail;
1453 } else if (reply->status_code != RTSP_STATUS_OK ||
1454 reply->nb_transports != 1) {
1455 err = AVERROR_INVALIDDATA;
1456 goto fail;
1457 }
1458
1459 /* XXX: same protocol for all streams is required */
1460 if (i > 0) {
1461 if (reply->transports[0].lower_transport != rt->lower_transport ||
1462 reply->transports[0].transport != rt->transport) {
1463 err = AVERROR_INVALIDDATA;
1464 goto fail;
1465 }
1466 } else {
1467 rt->lower_transport = reply->transports[0].lower_transport;
1468 rt->transport = reply->transports[0].transport;
1469 }
1470
1471 /* Fail if the server responded with another lower transport mode
1472 * than what we requested. */
1473 if (reply->transports[0].lower_transport != lower_transport) {
1474 av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1475 err = AVERROR_INVALIDDATA;
1476 goto fail;
1477 }
1478
1479 switch(reply->transports[0].lower_transport) {
1480 case RTSP_LOWER_TRANSPORT_TCP:
1481 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1482 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1483 break;
1484
1485 case RTSP_LOWER_TRANSPORT_UDP: {
1486 char url[1024], options[30] = "";
1487 const char *peer = host;
1488
1489 if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC)
1490 av_strlcpy(options, "?connect=1", sizeof(options));
1491 /* Use source address if specified */
1492 if (reply->transports[0].source[0])
1493 peer = reply->transports[0].source;
1494 ff_url_join(url, sizeof(url), "rtp", NULL, peer,
1495 reply->transports[0].server_port_min, "%s", options);
1496 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1497 ff_rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1498 err = AVERROR_INVALIDDATA;
1499 goto fail;
1500 }
1501 /* Try to initialize the connection state in a
1502 * potential NAT router by sending dummy packets.
1503 * RTP/RTCP dummy packets are used for RDT, too.
1504 */
1505 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1506 CONFIG_RTPDEC)
1507 ff_rtp_send_punch_packets(rtsp_st->rtp_handle);
1508 break;
1509 }
1510 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1511 char url[1024], namebuf[50], optbuf[20] = "";
1512 struct sockaddr_storage addr;
1513 int port, ttl;
1514
1515 if (reply->transports[0].destination.ss_family) {
1516 addr = reply->transports[0].destination;
1517 port = reply->transports[0].port_min;
1518 ttl = reply->transports[0].ttl;
1519 } else {
1520 addr = rtsp_st->sdp_ip;
1521 port = rtsp_st->sdp_port;
1522 ttl = rtsp_st->sdp_ttl;
1523 }
1524 if (ttl > 0)
1525 snprintf(optbuf, sizeof(optbuf), "?ttl=%d", ttl);
1526 getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1527 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1528 ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1529 port, "%s", optbuf);
1530 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
1531 &s->interrupt_callback, NULL) < 0) {
1532 err = AVERROR_INVALIDDATA;
1533 goto fail;
1534 }
1535 break;
1536 }
1537 }
1538
1539 if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
1540 goto fail;
1541 }
1542
1543 if (rt->nb_rtsp_streams && reply->timeout > 0)
1544 rt->timeout = reply->timeout;
1545
1546 if (rt->server_type == RTSP_SERVER_REAL)
1547 rt->need_subscription = 1;
1548
1549 return 0;
1550
1551 fail:
1552 ff_rtsp_undo_setup(s);
1553 return err;
1554 }
1555
1556 void ff_rtsp_close_connections(AVFormatContext *s)
1557 {
1558 RTSPState *rt = s->priv_data;
1559 if (rt->rtsp_hd_out != rt->rtsp_hd) ffurl_close(rt->rtsp_hd_out);
1560 ffurl_close(rt->rtsp_hd);
1561 rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1562 }
1563
1564 int ff_rtsp_connect(AVFormatContext *s)
1565 {
1566 RTSPState *rt = s->priv_data;
1567 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1568 int port, err, tcp_fd;
1569 RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1570 int lower_transport_mask = 0;
1571 char real_challenge[64] = "";
1572 struct sockaddr_storage peer;
1573 socklen_t peer_len = sizeof(peer);
1574
1575 if (rt->rtp_port_max < rt->rtp_port_min) {
1576 av_log(s, AV_LOG_ERROR, "Invalid UDP port range, max port %d less "
1577 "than min port %d\n", rt->rtp_port_max,
1578 rt->rtp_port_min);
1579 return AVERROR(EINVAL);
1580 }
1581
1582 if (!ff_network_init())
1583 return AVERROR(EIO);
1584
1585 if (s->max_delay < 0) /* Not set by the caller */
1586 s->max_delay = s->iformat ? DEFAULT_REORDERING_DELAY : 0;
1587
1588 rt->control_transport = RTSP_MODE_PLAIN;
1589 if (rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_HTTP)) {
1590 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1591 rt->control_transport = RTSP_MODE_TUNNEL;
1592 }
1593 /* Only pass through valid flags from here */
1594 rt->lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1595
1596 redirect:
1597 lower_transport_mask = rt->lower_transport_mask;
1598 /* extract hostname and port */
1599 av_url_split(NULL, 0, auth, sizeof(auth),
1600 host, sizeof(host), &port, path, sizeof(path), s->filename);
1601 if (*auth) {
1602 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1603 }
1604 if (port < 0)
1605 port = RTSP_DEFAULT_PORT;
1606
1607 if (!lower_transport_mask)
1608 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1609
1610 if (s->oformat) {
1611 /* Only UDP or TCP - UDP multicast isn't supported. */
1612 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1613 (1 << RTSP_LOWER_TRANSPORT_TCP);
1614 if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1615 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1616 "only UDP and TCP are supported for output.\n");
1617 err = AVERROR(EINVAL);
1618 goto fail;
1619 }
1620 }
1621
1622 /* Construct the URI used in request; this is similar to s->filename,
1623 * but with authentication credentials removed and RTSP specific options
1624 * stripped out. */
1625 ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1626 host, port, "%s", path);
1627
1628 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1629 /* set up initial handshake for tunneling */
1630 char httpname[1024];
1631 char sessioncookie[17];
1632 char headers[1024];
1633
1634 ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1635 snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1636 av_get_random_seed(), av_get_random_seed());
1637
1638 /* GET requests */
1639 if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ,
1640 &s->interrupt_callback) < 0) {
1641 err = AVERROR(EIO);
1642 goto fail;
1643 }
1644
1645 /* generate GET headers */
1646 snprintf(headers, sizeof(headers),
1647 "x-sessioncookie: %s\r\n"
1648 "Accept: application/x-rtsp-tunnelled\r\n"
1649 "Pragma: no-cache\r\n"
1650 "Cache-Control: no-cache\r\n",
1651 sessioncookie);
1652 av_opt_set(rt->rtsp_hd->priv_data, "headers", headers, 0);
1653
1654 /* complete the connection */
1655 if (ffurl_connect(rt->rtsp_hd, NULL)) {
1656 err = AVERROR(EIO);
1657 goto fail;
1658 }
1659
1660 /* POST requests */
1661 if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE,
1662 &s->interrupt_callback) < 0 ) {
1663 err = AVERROR(EIO);
1664 goto fail;
1665 }
1666
1667 /* generate POST headers */
1668 snprintf(headers, sizeof(headers),
1669 "x-sessioncookie: %s\r\n"
1670 "Content-Type: application/x-rtsp-tunnelled\r\n"
1671 "Pragma: no-cache\r\n"
1672 "Cache-Control: no-cache\r\n"
1673 "Content-Length: 32767\r\n"
1674 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1675 sessioncookie);
1676 av_opt_set(rt->rtsp_hd_out->priv_data, "headers", headers, 0);
1677 av_opt_set(rt->rtsp_hd_out->priv_data, "chunked_post", "0", 0);
1678
1679 /* Initialize the authentication state for the POST session. The HTTP
1680 * protocol implementation doesn't properly handle multi-pass
1681 * authentication for POST requests, since it would require one of
1682 * the following:
1683 * - implementing Expect: 100-continue, which many HTTP servers
1684 * don't support anyway, even less the RTSP servers that do HTTP
1685 * tunneling
1686 * - sending the whole POST data until getting a 401 reply specifying
1687 * what authentication method to use, then resending all that data
1688 * - waiting for potential 401 replies directly after sending the
1689 * POST header (waiting for some unspecified time)
1690 * Therefore, we copy the full auth state, which works for both basic
1691 * and digest. (For digest, we would have to synchronize the nonce
1692 * count variable between the two sessions, if we'd do more requests
1693 * with the original session, though.)
1694 */
1695 ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1696
1697 /* complete the connection */
1698 if (ffurl_connect(rt->rtsp_hd_out, NULL)) {
1699 err = AVERROR(EIO);
1700 goto fail;
1701 }
1702 } else {
1703 /* open the tcp connection */
1704 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1705 if (ffurl_open(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
1706 &s->interrupt_callback, NULL) < 0) {
1707 err = AVERROR(EIO);
1708 goto fail;
1709 }
1710 rt->rtsp_hd_out = rt->rtsp_hd;
1711 }
1712 rt->seq = 0;
1713
1714 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1715 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1716 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1717 NULL, 0, NI_NUMERICHOST);
1718 }
1719
1720 /* request options supported by the server; this also detects server
1721 * type */
1722 for (rt->server_type = RTSP_SERVER_RTP;;) {
1723 cmd[0] = 0;
1724 if (rt->server_type == RTSP_SERVER_REAL)
1725 av_strlcat(cmd,
1726 /*
1727 * The following entries are required for proper
1728 * streaming from a Realmedia server. They are
1729 * interdependent in some way although we currently
1730 * don't quite understand how. Values were copied
1731 * from mplayer SVN r23589.
1732 * ClientChallenge is a 16-byte ID in hex
1733 * CompanyID is a 16-byte ID in base64
1734 */
1735 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1736 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1737 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1738 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1739 sizeof(cmd));
1740 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1741 if (reply->status_code != RTSP_STATUS_OK) {
1742 err = AVERROR_INVALIDDATA;
1743 goto fail;
1744 }
1745
1746 /* detect server type if not standard-compliant RTP */
1747 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1748 rt->server_type = RTSP_SERVER_REAL;
1749 continue;
1750 } else if (!av_strncasecmp(reply->server, "WMServer/", 9)) {
1751 rt->server_type = RTSP_SERVER_WMS;
1752 } else if (rt->server_type == RTSP_SERVER_REAL)
1753 strcpy(real_challenge, reply->real_challenge);
1754 break;
1755 }
1756
1757 if (s->iformat && CONFIG_RTSP_DEMUXER)
1758 err = ff_rtsp_setup_input_streams(s, reply);
1759 else if (CONFIG_RTSP_MUXER)
1760 err = ff_rtsp_setup_output_streams(s, host);
1761 if (err)
1762 goto fail;
1763
1764 do {
1765 int lower_transport = ff_log2_tab[lower_transport_mask &
1766 ~(lower_transport_mask - 1)];
1767
1768 err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1769 rt->server_type == RTSP_SERVER_REAL ?
1770 real_challenge : NULL);
1771 if (err < 0)
1772 goto fail;
1773 lower_transport_mask &= ~(1 << lower_transport);
1774 if (lower_transport_mask == 0 && err == 1) {
1775 err = AVERROR(EPROTONOSUPPORT);
1776 goto fail;
1777 }
1778 } while (err);
1779
1780 rt->lower_transport_mask = lower_transport_mask;
1781 av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1782 rt->state = RTSP_STATE_IDLE;
1783 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1784 return 0;
1785 fail:
1786 ff_rtsp_close_streams(s);
1787 ff_rtsp_close_connections(s);
1788 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1789 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1790 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1791 reply->status_code,
1792 s->filename);
1793 goto redirect;
1794 }
1795 ff_network_close();
1796 return err;
1797 }
1798 #endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1799
1800 #if CONFIG_RTPDEC
1801 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1802 uint8_t *buf, int buf_size, int64_t wait_end)
1803 {
1804 RTSPState *rt = s->priv_data;
1805 RTSPStream *rtsp_st;
1806 int n, i, ret, tcp_fd, timeout_cnt = 0;
1807 int max_p = 0;
1808 struct pollfd *p = rt->p;
1809 int *fds = NULL, fdsnum, fdsidx;
1810
1811 for (;;) {
1812 if (ff_check_interrupt(&s->interrupt_callback))
1813 return AVERROR_EXIT;
1814 if (wait_end && wait_end - av_gettime() < 0)
1815 return AVERROR(EAGAIN);
1816 max_p = 0;
1817 if (rt->rtsp_hd) {
1818 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1819 p[max_p].fd = tcp_fd;
1820 p[max_p++].events = POLLIN;
1821 } else {
1822 tcp_fd = -1;
1823 }
1824 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1825 rtsp_st = rt->rtsp_streams[i];
1826 if (rtsp_st->rtp_handle) {
1827 if (ret = ffurl_get_multi_file_handle(rtsp_st->rtp_handle,
1828 &fds, &fdsnum)) {
1829 av_log(s, AV_LOG_ERROR, "Unable to recover rtp ports\n");
1830 return ret;
1831 }
1832 if (fdsnum != 2) {
1833 av_log(s, AV_LOG_ERROR,
1834 "Number of fds %d not supported\n", fdsnum);
1835 return AVERROR_INVALIDDATA;
1836 }
1837 for (fdsidx = 0; fdsidx < fdsnum; fdsidx++) {
1838 p[max_p].fd = fds[fdsidx];
1839 p[max_p++].events = POLLIN;
1840 }
1841 av_free(fds);
1842 }
1843 }
1844 n = poll(p, max_p, POLL_TIMEOUT_MS);
1845 if (n > 0) {
1846 int j = 1 - (tcp_fd == -1);
1847 timeout_cnt = 0;
1848 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1849 rtsp_st = rt->rtsp_streams[i];
1850 if (rtsp_st->rtp_handle) {
1851 if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
1852 ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size);
1853 if (ret > 0) {
1854 *prtsp_st = rtsp_st;
1855 return ret;
1856 }
1857 }
1858 j+=2;
1859 }
1860 }
1861 #if CONFIG_RTSP_DEMUXER
1862 if (tcp_fd != -1 && p[0].revents & POLLIN) {
1863 if (rt->rtsp_flags & RTSP_FLAG_LISTEN) {
1864 if (rt->state == RTSP_STATE_STREAMING) {
1865 if (!ff_rtsp_parse_streaming_commands(s))
1866 return AVERROR_EOF;
1867 else
1868 av_log(s, AV_LOG_WARNING,
1869 "Unable to answer to TEARDOWN\n");
1870 } else
1871 return 0;
1872 } else {
1873 RTSPMessageHeader reply;
1874 ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1875 if (ret < 0)
1876 return ret;
1877 /* XXX: parse message */
1878 if (rt->state != RTSP_STATE_STREAMING)
1879 return 0;
1880 }
1881 }
1882 #endif
1883 } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1884 return AVERROR(ETIMEDOUT);
1885 } else if (n < 0 && errno != EINTR)
1886 return AVERROR(errno);
1887 }
1888 }
1889
1890 static int pick_stream(AVFormatContext *s, RTSPStream **rtsp_st,
1891 const uint8_t *buf, int len)
1892 {
1893 RTSPState *rt = s->priv_data;
1894 int i;
1895 if (len < 0)
1896 return len;
1897 if (rt->nb_rtsp_streams == 1) {
1898 *rtsp_st = rt->rtsp_streams[0];
1899 return len;
1900 }
1901 if (len >= 8 && rt->transport == RTSP_TRANSPORT_RTP) {
1902 if (RTP_PT_IS_RTCP(rt->recvbuf[1])) {
1903 int no_ssrc = 0;
1904 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1905 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1906 if (!rtpctx)
1907 continue;
1908 if (rtpctx->ssrc == AV_RB32(&buf[4])) {
1909 *rtsp_st = rt->rtsp_streams[i];
1910 return len;
1911 }
1912 if (!rtpctx->ssrc)
1913 no_ssrc = 1;
1914 }
1915 if (no_ssrc) {
1916 av_log(s, AV_LOG_WARNING,
1917 "Unable to pick stream for packet - SSRC not known for "
1918 "all streams\n");
1919 return AVERROR(EAGAIN);
1920 }
1921 } else {
1922 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1923 if ((buf[1] & 0x7f) == rt->rtsp_streams[i]->sdp_payload_type) {
1924 *rtsp_st = rt->rtsp_streams[i];
1925 return len;
1926 }
1927 }
1928 }
1929 }
1930 av_log(s, AV_LOG_WARNING, "Unable to pick stream for packet\n");
1931 return AVERROR(EAGAIN);
1932 }
1933
1934 int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1935 {
1936 RTSPState *rt = s->priv_data;
1937 int ret, len;
1938 RTSPStream *rtsp_st, *first_queue_st = NULL;
1939 int64_t wait_end = 0;
1940
1941 if (rt->nb_byes == rt->nb_rtsp_streams)
1942 return AVERROR_EOF;
1943
1944 /* get next frames from the same RTP packet */
1945 if (rt->cur_transport_priv) {
1946 if (rt->transport == RTSP_TRANSPORT_RDT) {
1947 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1948 } else if (rt->transport == RTSP_TRANSPORT_RTP) {
1949 ret = ff_rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1950 } else if (rt->ts && CONFIG_RTPDEC) {
1951 ret = ff_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf + rt->recvbuf_pos, rt->recvbuf_len - rt->recvbuf_pos);
1952 if (ret >= 0) {
1953 rt->recvbuf_pos += ret;
1954 ret = rt->recvbuf_pos < rt->recvbuf_len;
1955 }
1956 } else
1957 ret = -1;
1958 if (ret == 0) {
1959 rt->cur_transport_priv = NULL;
1960 return 0;
1961 } else if (ret == 1) {
1962 return 0;
1963 } else
1964 rt->cur_transport_priv = NULL;
1965 }
1966
1967 redo:
1968 if (rt->transport == RTSP_TRANSPORT_RTP) {
1969 int i;
1970 int64_t first_queue_time = 0;
1971 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1972 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1973 int64_t queue_time;
1974 if (!rtpctx)
1975 continue;
1976 queue_time = ff_rtp_queued_packet_time(rtpctx);
1977 if (queue_time && (queue_time - first_queue_time < 0 ||
1978 !first_queue_time)) {
1979 first_queue_time = queue_time;
1980 first_queue_st = rt->rtsp_streams[i];
1981 }
1982 }
1983 if (first_queue_time) {
1984 wait_end = first_queue_time + s->max_delay;
1985 } else {
1986 wait_end = 0;
1987 first_queue_st = NULL;
1988 }
1989 }
1990
1991 /* read next RTP packet */
1992 if (!rt->recvbuf) {
1993 rt->recvbuf = av_malloc(RECVBUF_SIZE);
1994 if (!rt->recvbuf)
1995 return AVERROR(ENOMEM);
1996 }
1997
1998 switch(rt->lower_transport) {
1999 default:
2000 #if CONFIG_RTSP_DEMUXER
2001 case RTSP_LOWER_TRANSPORT_TCP:
2002 len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
2003 break;
2004 #endif
2005 case RTSP_LOWER_TRANSPORT_UDP:
2006 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
2007 len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
2008 if (len > 0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
2009 ff_rtp_check_and_send_back_rr(rtsp_st->transport_priv, rtsp_st->rtp_handle, NULL, len);
2010 break;
2011 case RTSP_LOWER_TRANSPORT_CUSTOM:
2012 if (first_queue_st && rt->transport == RTSP_TRANSPORT_RTP &&
2013 wait_end && wait_end < av_gettime())
2014 len = AVERROR(EAGAIN);
2015 else
2016 len = ffio_read_partial(s->pb, rt->recvbuf, RECVBUF_SIZE);
2017 len = pick_stream(s, &rtsp_st, rt->recvbuf, len);
2018 if (len > 0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
2019 ff_rtp_check_and_send_back_rr(rtsp_st->transport_priv, NULL, s->pb, len);
2020 break;
2021 }
2022 if (len == AVERROR(EAGAIN) && first_queue_st &&
2023 rt->transport == RTSP_TRANSPORT_RTP) {
2024 rtsp_st = first_queue_st;
2025 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
2026 goto end;
2027 }
2028 if (len < 0)
2029 return len;
2030 if (len == 0)
2031 return AVERROR_EOF;
2032 if (rt->transport == RTSP_TRANSPORT_RDT) {
2033 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2034 } else if (rt->transport == RTSP_TRANSPORT_RTP) {
2035 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2036 if (rtsp_st->feedback) {
2037 AVIOContext *pb = NULL;
2038 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_CUSTOM)
2039 pb = s->pb;
2040 ff_rtp_send_rtcp_feedback(rtsp_st->transport_priv, rtsp_st->rtp_handle, pb);
2041 }
2042 if (ret < 0) {
2043 /* Either bad packet, or a RTCP packet. Check if the
2044 * first_rtcp_ntp_time field was initialized. */
2045 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
2046 if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
2047 /* first_rtcp_ntp_time has been initialized for this stream,
2048 * copy the same value to all other uninitialized streams,
2049 * in order to map their timestamp origin to the same ntp time
2050 * as this one. */
2051 int i;
2052 AVStream *st = NULL;
2053 if (rtsp_st->stream_index >= 0)
2054 st = s->streams[rtsp_st->stream_index];
2055 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2056 RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
2057 AVStream *st2 = NULL;
2058 if (rt->rtsp_streams[i]->stream_index >= 0)
2059 st2 = s->streams[rt->rtsp_streams[i]->stream_index];
2060 if (rtpctx2 && st && st2 &&
2061 rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
2062 rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
2063 rtpctx2->rtcp_ts_offset = av_rescale_q(
2064 rtpctx->rtcp_ts_offset, st->time_base,
2065 st2->time_base);
2066 }
2067 }
2068 }
2069 if (ret == -RTCP_BYE) {
2070 rt->nb_byes++;
2071
2072 av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
2073 rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
2074
2075 if (rt->nb_byes == rt->nb_rtsp_streams)
2076 return AVERROR_EOF;
2077 }
2078 }
2079 } else if (rt->ts && CONFIG_RTPDEC) {
2080 ret = ff_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf, len);
2081 if (ret >= 0) {
2082 if (ret < len) {
2083 rt->recvbuf_len = len;
2084 rt->recvbuf_pos = ret;
2085 rt->cur_transport_priv = rt->ts;
2086 return 1;
2087 } else {
2088 ret = 0;
2089 }
2090 }
2091 } else {
2092 return AVERROR_INVALIDDATA;
2093 }
2094 end:
2095 if (ret < 0)
2096 goto redo;
2097 if (ret == 1)
2098 /* more packets may follow, so we save the RTP context */
2099 rt->cur_transport_priv = rtsp_st->transport_priv;
2100
2101 return ret;
2102 }
2103 #endif /* CONFIG_RTPDEC */
2104
2105 #if CONFIG_SDP_DEMUXER
2106 static int sdp_probe(AVProbeData *p1)
2107 {
2108 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
2109
2110 /* we look for a line beginning "c=IN IP" */
2111 while (p < p_end && *p != '\0') {
2112 if (p + sizeof("c=IN IP") - 1 < p_end &&
2113 av_strstart(p, "c=IN IP", NULL))
2114 return AVPROBE_SCORE_EXTENSION;
2115
2116 while (p < p_end - 1 && *p != '\n') p++;
2117 if (++p >= p_end)
2118 break;
2119 if (*p == '\r')
2120 p++;
2121 }
2122 return 0;
2123 }
2124
2125 static void append_source_addrs(char *buf, int size, const char *name,
2126 int count, struct RTSPSource **addrs)
2127 {
2128 int i;
2129 if (!count)
2130 return;
2131 av_strlcatf(buf, size, "&%s=%s", name, addrs[0]->addr);
2132 for (i = 1; i < count; i++)
2133 av_strlcatf(buf, size, ",%s", addrs[i]->addr);
2134 }
2135
2136 static int sdp_read_header(AVFormatContext *s)
2137 {
2138 RTSPState *rt = s->priv_data;
2139 RTSPStream *rtsp_st;
2140 int size, i, err;
2141 char *content;
2142 char url[1024];
2143
2144 if (!ff_network_init())
2145 return AVERROR(EIO);
2146
2147 if (s->max_delay < 0) /* Not set by the caller */
2148 s->max_delay = DEFAULT_REORDERING_DELAY;
2149 if (rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)
2150 rt->lower_transport = RTSP_LOWER_TRANSPORT_CUSTOM;
2151
2152 /* read the whole sdp file */
2153 /* XXX: better loading */
2154 content = av_malloc(SDP_MAX_SIZE);
2155 size = avio_read(s->pb, content, SDP_MAX_SIZE - 1);
2156 if (size <= 0) {
2157 av_free(content);
2158 return AVERROR_INVALIDDATA;
2159 }
2160 content[size] ='\0';
2161
2162 err = ff_sdp_parse(s, content);
2163 av_free(content);
2164 if (err) goto fail;
2165
2166 /* open each RTP stream */
2167 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2168 char namebuf[50];
2169 rtsp_st = rt->rtsp_streams[i];
2170
2171 if (!(rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)) {
2172 getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
2173 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
2174 ff_url_join(url, sizeof(url), "rtp", NULL,
2175 namebuf, rtsp_st->sdp_port,
2176 "?localport=%d&ttl=%d&connect=%d&write_to_source=%d",
2177 rtsp_st->sdp_port, rtsp_st->sdp_ttl,
2178 rt->rtsp_flags & RTSP_FLAG_FILTER_SRC ? 1 : 0,
2179 rt->rtsp_flags & RTSP_FLAG_RTCP_TO_SOURCE ? 1 : 0);
2180
2181 append_source_addrs(url, sizeof(url), "sources",
2182 rtsp_st->nb_include_source_addrs,
2183 rtsp_st->include_source_addrs);
2184 append_source_addrs(url, sizeof(url), "block",
2185 rtsp_st->nb_exclude_source_addrs,
2186 rtsp_st->exclude_source_addrs);
2187 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
2188 &s->interrupt_callback, NULL) < 0) {
2189 err = AVERROR_INVALIDDATA;
2190 goto fail;
2191 }
2192 }
2193 if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
2194 goto fail;
2195 }
2196 return 0;
2197 fail:
2198 ff_rtsp_close_streams(s);
2199 ff_network_close();
2200 return err;
2201 }
2202
2203 static int sdp_read_close(AVFormatContext *s)
2204 {
2205 ff_rtsp_close_streams(s);
2206 ff_network_close();
2207 return 0;
2208 }
2209
2210 static const AVClass sdp_demuxer_class = {
2211 .class_name = "SDP demuxer",
2212 .item_name = av_default_item_name,
2213 .option = sdp_options,
2214 .version = LIBAVUTIL_VERSION_INT,
2215 };
2216
2217 AVInputFormat ff_sdp_demuxer = {
2218 .name = "sdp",
2219 .long_name = NULL_IF_CONFIG_SMALL("SDP"),
2220 .priv_data_size = sizeof(RTSPState),
2221 .read_probe = sdp_probe,
2222 .read_header = sdp_read_header,
2223 .read_packet = ff_rtsp_fetch_packet,
2224 .read_close = sdp_read_close,
2225 .priv_class = &sdp_demuxer_class,
2226 };
2227 #endif /* CONFIG_SDP_DEMUXER */
2228
2229 #if CONFIG_RTP_DEMUXER
2230 static int rtp_probe(AVProbeData *p)
2231 {
2232 if (av_strstart(p->filename, "rtp:", NULL))
2233 return AVPROBE_SCORE_MAX;
2234 return 0;
2235 }
2236
2237 static int rtp_read_header(AVFormatContext *s)
2238 {
2239 uint8_t recvbuf[RTP_MAX_PACKET_LENGTH];
2240 char host[500], sdp[500];
2241 int ret, port;
2242 URLContext* in = NULL;
2243 int payload_type;
2244 AVCodecContext codec = { 0 };
2245 struct sockaddr_storage addr;
2246 AVIOContext pb;
2247 socklen_t addrlen = sizeof(addr);
2248 RTSPState *rt = s->priv_data;
2249
2250 if (!ff_network_init())
2251 return AVERROR(EIO);
2252
2253 ret = ffurl_open(&in, s->filename, AVIO_FLAG_READ,
2254 &s->interrupt_callback, NULL);
2255 if (ret)
2256 goto fail;
2257
2258 while (1) {
2259 ret = ffurl_read(in, recvbuf, sizeof(recvbuf));
2260 if (ret == AVERROR(EAGAIN))
2261 continue;
2262 if (ret < 0)
2263 goto fail;
2264 if (ret < 12) {
2265 av_log(s, AV_LOG_WARNING, "Received too short packet\n");
2266 continue;
2267 }
2268
2269 if ((recvbuf[0] & 0xc0) != 0x80) {
2270 av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
2271 "received\n");
2272 continue;
2273 }
2274
2275 if (RTP_PT_IS_RTCP(recvbuf[1]))
2276 continue;
2277
2278 payload_type = recvbuf[1] & 0x7f;
2279 break;
2280 }
2281 getsockname(ffurl_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
2282 ffurl_close(in);
2283 in = NULL;
2284
2285 if (ff_rtp_get_codec_info(&codec, payload_type)) {
2286 av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
2287 "without an SDP file describing it\n",
2288 payload_type);
2289 goto fail;
2290 }
2291 if (codec.codec_type != AVMEDIA_TYPE_DATA) {
2292 av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
2293 "properly you need an SDP file "
2294 "describing it\n");
2295 }
2296
2297 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
2298 NULL, 0, s->filename);
2299
2300 snprintf(sdp, sizeof(sdp),
2301 "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
2302 addr.ss_family == AF_INET ? 4 : 6, host,
2303 codec.codec_type == AVMEDIA_TYPE_DATA ? "application" :
2304 codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
2305 port, payload_type);
2306 av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
2307
2308 ffio_init_context(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
2309 s->pb = &pb;
2310
2311 /* sdp_read_header initializes this again */
2312 ff_network_close();
2313
2314 rt->media_type_mask = (1 << (AVMEDIA_TYPE_DATA+1)) - 1;
2315
2316 ret = sdp_read_header(s);
2317 s->pb = NULL;
2318 return ret;
2319
2320 fail:
2321 if (in)
2322 ffurl_close(in);
2323 ff_network_close();
2324 return ret;
2325 }
2326
2327 static const AVClass rtp_demuxer_class = {
2328 .class_name = "RTP demuxer",
2329 .item_name = av_default_item_name,
2330 .option = rtp_options,
2331 .version = LIBAVUTIL_VERSION_INT,
2332 };
2333
2334 AVInputFormat ff_rtp_demuxer = {
2335 .name = "rtp",
2336 .long_name = NULL_IF_CONFIG_SMALL("RTP input"),
2337 .priv_data_size = sizeof(RTSPState),
2338 .read_probe = rtp_probe,
2339 .read_header = rtp_read_header,
2340 .read_packet = ff_rtsp_fetch_packet,
2341 .read_close = sdp_read_close,
2342 .flags = AVFMT_NOFILE,
2343 .priv_class = &rtp_demuxer_class,
2344 };
2345 #endif /* CONFIG_RTP_DEMUXER */