b2735f6165da51cac6f63fd146f0286a1db478ae
[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/parseutils.h"
26 #include "libavutil/random_seed.h"
27 #include "libavutil/dict.h"
28 #include "avformat.h"
29 #include "avio_internal.h"
30
31 #include <sys/time.h>
32 #if HAVE_POLL_H
33 #include <poll.h>
34 #endif
35 #include <strings.h>
36 #include "internal.h"
37 #include "network.h"
38 #include "os_support.h"
39 #include "http.h"
40 #include "rtsp.h"
41
42 #include "rtpdec.h"
43 #include "rdt.h"
44 #include "rtpdec_formats.h"
45 #include "rtpenc_chain.h"
46 #include "url.h"
47
48 //#define DEBUG
49
50 /* Timeout values for socket poll, in ms,
51 * and read_packet(), in seconds */
52 #define POLL_TIMEOUT_MS 100
53 #define READ_PACKET_TIMEOUT_S 10
54 #define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / POLL_TIMEOUT_MS
55 #define SDP_MAX_SIZE 16384
56 #define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
57
58 static void get_word_until_chars(char *buf, int buf_size,
59 const char *sep, const char **pp)
60 {
61 const char *p;
62 char *q;
63
64 p = *pp;
65 p += strspn(p, SPACE_CHARS);
66 q = buf;
67 while (!strchr(sep, *p) && *p != '\0') {
68 if ((q - buf) < buf_size - 1)
69 *q++ = *p;
70 p++;
71 }
72 if (buf_size > 0)
73 *q = '\0';
74 *pp = p;
75 }
76
77 static void get_word_sep(char *buf, int buf_size, const char *sep,
78 const char **pp)
79 {
80 if (**pp == '/') (*pp)++;
81 get_word_until_chars(buf, buf_size, sep, pp);
82 }
83
84 static void get_word(char *buf, int buf_size, const char **pp)
85 {
86 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
87 }
88
89 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
90 * and end time.
91 * Used for seeking in the rtp stream.
92 */
93 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
94 {
95 char buf[256];
96
97 p += strspn(p, SPACE_CHARS);
98 if (!av_stristart(p, "npt=", &p))
99 return;
100
101 *start = AV_NOPTS_VALUE;
102 *end = AV_NOPTS_VALUE;
103
104 get_word_sep(buf, sizeof(buf), "-", &p);
105 av_parse_time(start, buf, 1);
106 if (*p == '-') {
107 p++;
108 get_word_sep(buf, sizeof(buf), "-", &p);
109 av_parse_time(end, buf, 1);
110 }
111 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
112 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
113 }
114
115 static int get_sockaddr(const char *buf, struct sockaddr_storage *sock)
116 {
117 struct addrinfo hints, *ai = NULL;
118 memset(&hints, 0, sizeof(hints));
119 hints.ai_flags = AI_NUMERICHOST;
120 if (getaddrinfo(buf, NULL, &hints, &ai))
121 return -1;
122 memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
123 freeaddrinfo(ai);
124 return 0;
125 }
126
127 #if CONFIG_RTPDEC
128 static void init_rtp_handler(RTPDynamicProtocolHandler *handler,
129 RTSPStream *rtsp_st, AVCodecContext *codec)
130 {
131 if (!handler)
132 return;
133 codec->codec_id = handler->codec_id;
134 rtsp_st->dynamic_handler = handler;
135 if (handler->alloc)
136 rtsp_st->dynamic_protocol_context = handler->alloc();
137 }
138
139 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
140 static int sdp_parse_rtpmap(AVFormatContext *s,
141 AVStream *st, RTSPStream *rtsp_st,
142 int payload_type, const char *p)
143 {
144 AVCodecContext *codec = st->codec;
145 char buf[256];
146 int i;
147 AVCodec *c;
148 const char *c_name;
149
150 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
151 * see if we can handle this kind of payload.
152 * The space should normally not be there but some Real streams or
153 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
154 * have a trailing space. */
155 get_word_sep(buf, sizeof(buf), "/ ", &p);
156 if (payload_type >= RTP_PT_PRIVATE) {
157 RTPDynamicProtocolHandler *handler =
158 ff_rtp_handler_find_by_name(buf, codec->codec_type);
159 init_rtp_handler(handler, rtsp_st, codec);
160 /* If no dynamic handler was found, check with the list of standard
161 * allocated types, if such a stream for some reason happens to
162 * use a private payload type. This isn't handled in rtpdec.c, since
163 * the format name from the rtpmap line never is passed into rtpdec. */
164 if (!rtsp_st->dynamic_handler)
165 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
166 } else {
167 /* We are in a standard case
168 * (from http://www.iana.org/assignments/rtp-parameters). */
169 /* search into AVRtpPayloadTypes[] */
170 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
171 }
172
173 c = avcodec_find_decoder(codec->codec_id);
174 if (c && c->name)
175 c_name = c->name;
176 else
177 c_name = "(null)";
178
179 get_word_sep(buf, sizeof(buf), "/", &p);
180 i = atoi(buf);
181 switch (codec->codec_type) {
182 case AVMEDIA_TYPE_AUDIO:
183 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
184 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
185 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
186 if (i > 0) {
187 codec->sample_rate = i;
188 av_set_pts_info(st, 32, 1, codec->sample_rate);
189 get_word_sep(buf, sizeof(buf), "/", &p);
190 i = atoi(buf);
191 if (i > 0)
192 codec->channels = i;
193 // TODO: there is a bug here; if it is a mono stream, and
194 // less than 22000Hz, faad upconverts to stereo and twice
195 // the frequency. No problem, but the sample rate is being
196 // set here by the sdp line. Patch on its way. (rdm)
197 }
198 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
199 codec->sample_rate);
200 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
201 codec->channels);
202 break;
203 case AVMEDIA_TYPE_VIDEO:
204 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
205 if (i > 0)
206 av_set_pts_info(st, 32, 1, i);
207 break;
208 default:
209 break;
210 }
211 return 0;
212 }
213
214 /* parse the attribute line from the fmtp a line of an sdp response. This
215 * is broken out as a function because it is used in rtp_h264.c, which is
216 * forthcoming. */
217 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
218 char *value, int value_size)
219 {
220 *p += strspn(*p, SPACE_CHARS);
221 if (**p) {
222 get_word_sep(attr, attr_size, "=", p);
223 if (**p == '=')
224 (*p)++;
225 get_word_sep(value, value_size, ";", p);
226 if (**p == ';')
227 (*p)++;
228 return 1;
229 }
230 return 0;
231 }
232
233 typedef struct SDPParseState {
234 /* SDP only */
235 struct sockaddr_storage default_ip;
236 int default_ttl;
237 int skip_media; ///< set if an unknown m= line occurs
238 } SDPParseState;
239
240 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
241 int letter, const char *buf)
242 {
243 RTSPState *rt = s->priv_data;
244 char buf1[64], st_type[64];
245 const char *p;
246 enum AVMediaType codec_type;
247 int payload_type, i;
248 AVStream *st;
249 RTSPStream *rtsp_st;
250 struct sockaddr_storage sdp_ip;
251 int ttl;
252
253 av_dlog(s, "sdp: %c='%s'\n", letter, buf);
254
255 p = buf;
256 if (s1->skip_media && letter != 'm')
257 return;
258 switch (letter) {
259 case 'c':
260 get_word(buf1, sizeof(buf1), &p);
261 if (strcmp(buf1, "IN") != 0)
262 return;
263 get_word(buf1, sizeof(buf1), &p);
264 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
265 return;
266 get_word_sep(buf1, sizeof(buf1), "/", &p);
267 if (get_sockaddr(buf1, &sdp_ip))
268 return;
269 ttl = 16;
270 if (*p == '/') {
271 p++;
272 get_word_sep(buf1, sizeof(buf1), "/", &p);
273 ttl = atoi(buf1);
274 }
275 if (s->nb_streams == 0) {
276 s1->default_ip = sdp_ip;
277 s1->default_ttl = ttl;
278 } else {
279 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
280 rtsp_st->sdp_ip = sdp_ip;
281 rtsp_st->sdp_ttl = ttl;
282 }
283 break;
284 case 's':
285 av_dict_set(&s->metadata, "title", p, 0);
286 break;
287 case 'i':
288 if (s->nb_streams == 0) {
289 av_dict_set(&s->metadata, "comment", p, 0);
290 break;
291 }
292 break;
293 case 'm':
294 /* new stream */
295 s1->skip_media = 0;
296 get_word(st_type, sizeof(st_type), &p);
297 if (!strcmp(st_type, "audio")) {
298 codec_type = AVMEDIA_TYPE_AUDIO;
299 } else if (!strcmp(st_type, "video")) {
300 codec_type = AVMEDIA_TYPE_VIDEO;
301 } else if (!strcmp(st_type, "application")) {
302 codec_type = AVMEDIA_TYPE_DATA;
303 } else {
304 s1->skip_media = 1;
305 return;
306 }
307 rtsp_st = av_mallocz(sizeof(RTSPStream));
308 if (!rtsp_st)
309 return;
310 rtsp_st->stream_index = -1;
311 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
312
313 rtsp_st->sdp_ip = s1->default_ip;
314 rtsp_st->sdp_ttl = s1->default_ttl;
315
316 get_word(buf1, sizeof(buf1), &p); /* port */
317 rtsp_st->sdp_port = atoi(buf1);
318
319 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
320
321 /* XXX: handle list of formats */
322 get_word(buf1, sizeof(buf1), &p); /* format list */
323 rtsp_st->sdp_payload_type = atoi(buf1);
324
325 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
326 /* no corresponding stream */
327 } else {
328 st = av_new_stream(s, rt->nb_rtsp_streams - 1);
329 if (!st)
330 return;
331 rtsp_st->stream_index = st->index;
332 st->codec->codec_type = codec_type;
333 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
334 RTPDynamicProtocolHandler *handler;
335 /* if standard payload type, we can find the codec right now */
336 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
337 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
338 st->codec->sample_rate > 0)
339 av_set_pts_info(st, 32, 1, st->codec->sample_rate);
340 /* Even static payload types may need a custom depacketizer */
341 handler = ff_rtp_handler_find_by_id(
342 rtsp_st->sdp_payload_type, st->codec->codec_type);
343 init_rtp_handler(handler, rtsp_st, st->codec);
344 }
345 }
346 /* put a default control url */
347 av_strlcpy(rtsp_st->control_url, rt->control_uri,
348 sizeof(rtsp_st->control_url));
349 break;
350 case 'a':
351 if (av_strstart(p, "control:", &p)) {
352 if (s->nb_streams == 0) {
353 if (!strncmp(p, "rtsp://", 7))
354 av_strlcpy(rt->control_uri, p,
355 sizeof(rt->control_uri));
356 } else {
357 char proto[32];
358 /* get the control url */
359 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
360
361 /* XXX: may need to add full url resolution */
362 av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
363 NULL, NULL, 0, p);
364 if (proto[0] == '\0') {
365 /* relative control URL */
366 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
367 av_strlcat(rtsp_st->control_url, "/",
368 sizeof(rtsp_st->control_url));
369 av_strlcat(rtsp_st->control_url, p,
370 sizeof(rtsp_st->control_url));
371 } else
372 av_strlcpy(rtsp_st->control_url, p,
373 sizeof(rtsp_st->control_url));
374 }
375 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
376 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
377 get_word(buf1, sizeof(buf1), &p);
378 payload_type = atoi(buf1);
379 st = s->streams[s->nb_streams - 1];
380 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
381 sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
382 } else if (av_strstart(p, "fmtp:", &p) ||
383 av_strstart(p, "framesize:", &p)) {
384 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
385 // let dynamic protocol handlers have a stab at the line.
386 get_word(buf1, sizeof(buf1), &p);
387 payload_type = atoi(buf1);
388 for (i = 0; i < rt->nb_rtsp_streams; i++) {
389 rtsp_st = rt->rtsp_streams[i];
390 if (rtsp_st->sdp_payload_type == payload_type &&
391 rtsp_st->dynamic_handler &&
392 rtsp_st->dynamic_handler->parse_sdp_a_line)
393 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
394 rtsp_st->dynamic_protocol_context, buf);
395 }
396 } else if (av_strstart(p, "range:", &p)) {
397 int64_t start, end;
398
399 // this is so that seeking on a streamed file can work.
400 rtsp_parse_range_npt(p, &start, &end);
401 s->start_time = start;
402 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
403 s->duration = (end == AV_NOPTS_VALUE) ?
404 AV_NOPTS_VALUE : end - start;
405 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
406 if (atoi(p) == 1)
407 rt->transport = RTSP_TRANSPORT_RDT;
408 } else if (av_strstart(p, "SampleRate:integer;", &p) &&
409 s->nb_streams > 0) {
410 st = s->streams[s->nb_streams - 1];
411 st->codec->sample_rate = atoi(p);
412 } else {
413 if (rt->server_type == RTSP_SERVER_WMS)
414 ff_wms_parse_sdp_a_line(s, p);
415 if (s->nb_streams > 0) {
416 if (rt->server_type == RTSP_SERVER_REAL)
417 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
418
419 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
420 if (rtsp_st->dynamic_handler &&
421 rtsp_st->dynamic_handler->parse_sdp_a_line)
422 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
423 s->nb_streams - 1,
424 rtsp_st->dynamic_protocol_context, buf);
425 }
426 }
427 break;
428 }
429 }
430
431 /**
432 * Parse the sdp description and allocate the rtp streams and the
433 * pollfd array used for udp ones.
434 */
435
436 int ff_sdp_parse(AVFormatContext *s, const char *content)
437 {
438 RTSPState *rt = s->priv_data;
439 const char *p;
440 int letter;
441 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
442 * contain long SDP lines containing complete ASF Headers (several
443 * kB) or arrays of MDPR (RM stream descriptor) headers plus
444 * "rulebooks" describing their properties. Therefore, the SDP line
445 * buffer is large.
446 *
447 * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
448 * in rtpdec_xiph.c. */
449 char buf[16384], *q;
450 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
451
452 memset(s1, 0, sizeof(SDPParseState));
453 p = content;
454 for (;;) {
455 p += strspn(p, SPACE_CHARS);
456 letter = *p;
457 if (letter == '\0')
458 break;
459 p++;
460 if (*p != '=')
461 goto next_line;
462 p++;
463 /* get the content */
464 q = buf;
465 while (*p != '\n' && *p != '\r' && *p != '\0') {
466 if ((q - buf) < sizeof(buf) - 1)
467 *q++ = *p;
468 p++;
469 }
470 *q = '\0';
471 sdp_parse_line(s, s1, letter, buf);
472 next_line:
473 while (*p != '\n' && *p != '\0')
474 p++;
475 if (*p == '\n')
476 p++;
477 }
478 rt->p = av_malloc(sizeof(struct pollfd)*2*(rt->nb_rtsp_streams+1));
479 if (!rt->p) return AVERROR(ENOMEM);
480 return 0;
481 }
482 #endif /* CONFIG_RTPDEC */
483
484 void ff_rtsp_undo_setup(AVFormatContext *s)
485 {
486 RTSPState *rt = s->priv_data;
487 int i;
488
489 for (i = 0; i < rt->nb_rtsp_streams; i++) {
490 RTSPStream *rtsp_st = rt->rtsp_streams[i];
491 if (!rtsp_st)
492 continue;
493 if (rtsp_st->transport_priv) {
494 if (s->oformat) {
495 AVFormatContext *rtpctx = rtsp_st->transport_priv;
496 av_write_trailer(rtpctx);
497 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
498 uint8_t *ptr;
499 avio_close_dyn_buf(rtpctx->pb, &ptr);
500 av_free(ptr);
501 } else {
502 avio_close(rtpctx->pb);
503 }
504 avformat_free_context(rtpctx);
505 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
506 ff_rdt_parse_close(rtsp_st->transport_priv);
507 else if (CONFIG_RTPDEC)
508 rtp_parse_close(rtsp_st->transport_priv);
509 }
510 rtsp_st->transport_priv = NULL;
511 if (rtsp_st->rtp_handle)
512 ffurl_close(rtsp_st->rtp_handle);
513 rtsp_st->rtp_handle = NULL;
514 }
515 }
516
517 /* close and free RTSP streams */
518 void ff_rtsp_close_streams(AVFormatContext *s)
519 {
520 RTSPState *rt = s->priv_data;
521 int i;
522 RTSPStream *rtsp_st;
523
524 ff_rtsp_undo_setup(s);
525 for (i = 0; i < rt->nb_rtsp_streams; i++) {
526 rtsp_st = rt->rtsp_streams[i];
527 if (rtsp_st) {
528 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
529 rtsp_st->dynamic_handler->free(
530 rtsp_st->dynamic_protocol_context);
531 av_free(rtsp_st);
532 }
533 }
534 av_free(rt->rtsp_streams);
535 if (rt->asf_ctx) {
536 av_close_input_stream (rt->asf_ctx);
537 rt->asf_ctx = NULL;
538 }
539 av_free(rt->p);
540 av_free(rt->recvbuf);
541 }
542
543 static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
544 {
545 RTSPState *rt = s->priv_data;
546 AVStream *st = NULL;
547
548 /* open the RTP context */
549 if (rtsp_st->stream_index >= 0)
550 st = s->streams[rtsp_st->stream_index];
551 if (!st)
552 s->ctx_flags |= AVFMTCTX_NOHEADER;
553
554 if (s->oformat && CONFIG_RTSP_MUXER) {
555 rtsp_st->transport_priv = ff_rtp_chain_mux_open(s, st,
556 rtsp_st->rtp_handle,
557 RTSP_TCP_MAX_PACKET_SIZE);
558 /* Ownership of rtp_handle is passed to the rtp mux context */
559 rtsp_st->rtp_handle = NULL;
560 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
561 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
562 rtsp_st->dynamic_protocol_context,
563 rtsp_st->dynamic_handler);
564 else if (CONFIG_RTPDEC)
565 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
566 rtsp_st->sdp_payload_type,
567 (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
568 ? 0 : RTP_REORDER_QUEUE_DEFAULT_SIZE);
569
570 if (!rtsp_st->transport_priv) {
571 return AVERROR(ENOMEM);
572 } else if (rt->transport != RTSP_TRANSPORT_RDT && CONFIG_RTPDEC) {
573 if (rtsp_st->dynamic_handler) {
574 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
575 rtsp_st->dynamic_protocol_context,
576 rtsp_st->dynamic_handler);
577 }
578 }
579
580 return 0;
581 }
582
583 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
584 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
585 {
586 const char *p;
587 int v;
588
589 p = *pp;
590 p += strspn(p, SPACE_CHARS);
591 v = strtol(p, (char **)&p, 10);
592 if (*p == '-') {
593 p++;
594 *min_ptr = v;
595 v = strtol(p, (char **)&p, 10);
596 *max_ptr = v;
597 } else {
598 *min_ptr = v;
599 *max_ptr = v;
600 }
601 *pp = p;
602 }
603
604 /* XXX: only one transport specification is parsed */
605 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
606 {
607 char transport_protocol[16];
608 char profile[16];
609 char lower_transport[16];
610 char parameter[16];
611 RTSPTransportField *th;
612 char buf[256];
613
614 reply->nb_transports = 0;
615
616 for (;;) {
617 p += strspn(p, SPACE_CHARS);
618 if (*p == '\0')
619 break;
620
621 th = &reply->transports[reply->nb_transports];
622
623 get_word_sep(transport_protocol, sizeof(transport_protocol),
624 "/", &p);
625 if (!strcasecmp (transport_protocol, "rtp")) {
626 get_word_sep(profile, sizeof(profile), "/;,", &p);
627 lower_transport[0] = '\0';
628 /* rtp/avp/<protocol> */
629 if (*p == '/') {
630 get_word_sep(lower_transport, sizeof(lower_transport),
631 ";,", &p);
632 }
633 th->transport = RTSP_TRANSPORT_RTP;
634 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
635 !strcasecmp (transport_protocol, "x-real-rdt")) {
636 /* x-pn-tng/<protocol> */
637 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
638 profile[0] = '\0';
639 th->transport = RTSP_TRANSPORT_RDT;
640 }
641 if (!strcasecmp(lower_transport, "TCP"))
642 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
643 else
644 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
645
646 if (*p == ';')
647 p++;
648 /* get each parameter */
649 while (*p != '\0' && *p != ',') {
650 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
651 if (!strcmp(parameter, "port")) {
652 if (*p == '=') {
653 p++;
654 rtsp_parse_range(&th->port_min, &th->port_max, &p);
655 }
656 } else if (!strcmp(parameter, "client_port")) {
657 if (*p == '=') {
658 p++;
659 rtsp_parse_range(&th->client_port_min,
660 &th->client_port_max, &p);
661 }
662 } else if (!strcmp(parameter, "server_port")) {
663 if (*p == '=') {
664 p++;
665 rtsp_parse_range(&th->server_port_min,
666 &th->server_port_max, &p);
667 }
668 } else if (!strcmp(parameter, "interleaved")) {
669 if (*p == '=') {
670 p++;
671 rtsp_parse_range(&th->interleaved_min,
672 &th->interleaved_max, &p);
673 }
674 } else if (!strcmp(parameter, "multicast")) {
675 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
676 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
677 } else if (!strcmp(parameter, "ttl")) {
678 if (*p == '=') {
679 p++;
680 th->ttl = strtol(p, (char **)&p, 10);
681 }
682 } else if (!strcmp(parameter, "destination")) {
683 if (*p == '=') {
684 p++;
685 get_word_sep(buf, sizeof(buf), ";,", &p);
686 get_sockaddr(buf, &th->destination);
687 }
688 } else if (!strcmp(parameter, "source")) {
689 if (*p == '=') {
690 p++;
691 get_word_sep(buf, sizeof(buf), ";,", &p);
692 av_strlcpy(th->source, buf, sizeof(th->source));
693 }
694 }
695
696 while (*p != ';' && *p != '\0' && *p != ',')
697 p++;
698 if (*p == ';')
699 p++;
700 }
701 if (*p == ',')
702 p++;
703
704 reply->nb_transports++;
705 }
706 }
707
708 static void handle_rtp_info(RTSPState *rt, const char *url,
709 uint32_t seq, uint32_t rtptime)
710 {
711 int i;
712 if (!rtptime || !url[0])
713 return;
714 if (rt->transport != RTSP_TRANSPORT_RTP)
715 return;
716 for (i = 0; i < rt->nb_rtsp_streams; i++) {
717 RTSPStream *rtsp_st = rt->rtsp_streams[i];
718 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
719 if (!rtpctx)
720 continue;
721 if (!strcmp(rtsp_st->control_url, url)) {
722 rtpctx->base_timestamp = rtptime;
723 break;
724 }
725 }
726 }
727
728 static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
729 {
730 int read = 0;
731 char key[20], value[1024], url[1024] = "";
732 uint32_t seq = 0, rtptime = 0;
733
734 for (;;) {
735 p += strspn(p, SPACE_CHARS);
736 if (!*p)
737 break;
738 get_word_sep(key, sizeof(key), "=", &p);
739 if (*p != '=')
740 break;
741 p++;
742 get_word_sep(value, sizeof(value), ";, ", &p);
743 read++;
744 if (!strcmp(key, "url"))
745 av_strlcpy(url, value, sizeof(url));
746 else if (!strcmp(key, "seq"))
747 seq = strtoul(value, NULL, 10);
748 else if (!strcmp(key, "rtptime"))
749 rtptime = strtoul(value, NULL, 10);
750 if (*p == ',') {
751 handle_rtp_info(rt, url, seq, rtptime);
752 url[0] = '\0';
753 seq = rtptime = 0;
754 read = 0;
755 }
756 if (*p)
757 p++;
758 }
759 if (read > 0)
760 handle_rtp_info(rt, url, seq, rtptime);
761 }
762
763 void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
764 RTSPState *rt, const char *method)
765 {
766 const char *p;
767
768 /* NOTE: we do case independent match for broken servers */
769 p = buf;
770 if (av_stristart(p, "Session:", &p)) {
771 int t;
772 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
773 if (av_stristart(p, ";timeout=", &p) &&
774 (t = strtol(p, NULL, 10)) > 0) {
775 reply->timeout = t;
776 }
777 } else if (av_stristart(p, "Content-Length:", &p)) {
778 reply->content_length = strtol(p, NULL, 10);
779 } else if (av_stristart(p, "Transport:", &p)) {
780 rtsp_parse_transport(reply, p);
781 } else if (av_stristart(p, "CSeq:", &p)) {
782 reply->seq = strtol(p, NULL, 10);
783 } else if (av_stristart(p, "Range:", &p)) {
784 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
785 } else if (av_stristart(p, "RealChallenge1:", &p)) {
786 p += strspn(p, SPACE_CHARS);
787 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
788 } else if (av_stristart(p, "Server:", &p)) {
789 p += strspn(p, SPACE_CHARS);
790 av_strlcpy(reply->server, p, sizeof(reply->server));
791 } else if (av_stristart(p, "Notice:", &p) ||
792 av_stristart(p, "X-Notice:", &p)) {
793 reply->notice = strtol(p, NULL, 10);
794 } else if (av_stristart(p, "Location:", &p)) {
795 p += strspn(p, SPACE_CHARS);
796 av_strlcpy(reply->location, p , sizeof(reply->location));
797 } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
798 p += strspn(p, SPACE_CHARS);
799 ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
800 } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
801 p += strspn(p, SPACE_CHARS);
802 ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
803 } else if (av_stristart(p, "Content-Base:", &p) && rt) {
804 p += strspn(p, SPACE_CHARS);
805 if (method && !strcmp(method, "DESCRIBE"))
806 av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
807 } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
808 p += strspn(p, SPACE_CHARS);
809 if (method && !strcmp(method, "PLAY"))
810 rtsp_parse_rtp_info(rt, p);
811 } else if (av_stristart(p, "Public:", &p) && rt) {
812 if (strstr(p, "GET_PARAMETER") &&
813 method && !strcmp(method, "OPTIONS"))
814 rt->get_parameter_supported = 1;
815 }
816 }
817
818 /* skip a RTP/TCP interleaved packet */
819 void ff_rtsp_skip_packet(AVFormatContext *s)
820 {
821 RTSPState *rt = s->priv_data;
822 int ret, len, len1;
823 uint8_t buf[1024];
824
825 ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
826 if (ret != 3)
827 return;
828 len = AV_RB16(buf + 1);
829
830 av_dlog(s, "skipping RTP packet len=%d\n", len);
831
832 /* skip payload */
833 while (len > 0) {
834 len1 = len;
835 if (len1 > sizeof(buf))
836 len1 = sizeof(buf);
837 ret = ffurl_read_complete(rt->rtsp_hd, buf, len1);
838 if (ret != len1)
839 return;
840 len -= len1;
841 }
842 }
843
844 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
845 unsigned char **content_ptr,
846 int return_on_interleaved_data, const char *method)
847 {
848 RTSPState *rt = s->priv_data;
849 char buf[4096], buf1[1024], *q;
850 unsigned char ch;
851 const char *p;
852 int ret, content_length, line_count = 0;
853 unsigned char *content = NULL;
854
855 memset(reply, 0, sizeof(*reply));
856
857 /* parse reply (XXX: use buffers) */
858 rt->last_reply[0] = '\0';
859 for (;;) {
860 q = buf;
861 for (;;) {
862 ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1);
863 av_dlog(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
864 if (ret != 1)
865 return AVERROR_EOF;
866 if (ch == '\n')
867 break;
868 if (ch == '$') {
869 /* XXX: only parse it if first char on line ? */
870 if (return_on_interleaved_data) {
871 return 1;
872 } else
873 ff_rtsp_skip_packet(s);
874 } else if (ch != '\r') {
875 if ((q - buf) < sizeof(buf) - 1)
876 *q++ = ch;
877 }
878 }
879 *q = '\0';
880
881 av_dlog(s, "line='%s'\n", buf);
882
883 /* test if last line */
884 if (buf[0] == '\0')
885 break;
886 p = buf;
887 if (line_count == 0) {
888 /* get reply code */
889 get_word(buf1, sizeof(buf1), &p);
890 get_word(buf1, sizeof(buf1), &p);
891 reply->status_code = atoi(buf1);
892 av_strlcpy(reply->reason, p, sizeof(reply->reason));
893 } else {
894 ff_rtsp_parse_line(reply, p, rt, method);
895 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
896 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
897 }
898 line_count++;
899 }
900
901 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
902 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
903
904 content_length = reply->content_length;
905 if (content_length > 0) {
906 /* leave some room for a trailing '\0' (useful for simple parsing) */
907 content = av_malloc(content_length + 1);
908 ffurl_read_complete(rt->rtsp_hd, content, content_length);
909 content[content_length] = '\0';
910 }
911 if (content_ptr)
912 *content_ptr = content;
913 else
914 av_free(content);
915
916 if (rt->seq != reply->seq) {
917 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
918 rt->seq, reply->seq);
919 }
920
921 /* EOS */
922 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
923 reply->notice == 2104 /* Start-of-Stream Reached */ ||
924 reply->notice == 2306 /* Continuous Feed Terminated */) {
925 rt->state = RTSP_STATE_IDLE;
926 } else if (reply->notice >= 4400 && reply->notice < 5500) {
927 return AVERROR(EIO); /* data or server error */
928 } else if (reply->notice == 2401 /* Ticket Expired */ ||
929 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
930 return AVERROR(EPERM);
931
932 return 0;
933 }
934
935 /**
936 * Send a command to the RTSP server without waiting for the reply.
937 *
938 * @param s RTSP (de)muxer context
939 * @param method the method for the request
940 * @param url the target url for the request
941 * @param headers extra header lines to include in the request
942 * @param send_content if non-null, the data to send as request body content
943 * @param send_content_length the length of the send_content data, or 0 if
944 * send_content is null
945 *
946 * @return zero if success, nonzero otherwise
947 */
948 static int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
949 const char *method, const char *url,
950 const char *headers,
951 const unsigned char *send_content,
952 int send_content_length)
953 {
954 RTSPState *rt = s->priv_data;
955 char buf[4096], *out_buf;
956 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
957
958 /* Add in RTSP headers */
959 out_buf = buf;
960 rt->seq++;
961 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
962 if (headers)
963 av_strlcat(buf, headers, sizeof(buf));
964 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
965 if (rt->session_id[0] != '\0' && (!headers ||
966 !strstr(headers, "\nIf-Match:"))) {
967 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
968 }
969 if (rt->auth[0]) {
970 char *str = ff_http_auth_create_response(&rt->auth_state,
971 rt->auth, url, method);
972 if (str)
973 av_strlcat(buf, str, sizeof(buf));
974 av_free(str);
975 }
976 if (send_content_length > 0 && send_content)
977 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
978 av_strlcat(buf, "\r\n", sizeof(buf));
979
980 /* base64 encode rtsp if tunneling */
981 if (rt->control_transport == RTSP_MODE_TUNNEL) {
982 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
983 out_buf = base64buf;
984 }
985
986 av_dlog(s, "Sending:\n%s--\n", buf);
987
988 ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
989 if (send_content_length > 0 && send_content) {
990 if (rt->control_transport == RTSP_MODE_TUNNEL) {
991 av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
992 "with content data not supported\n");
993 return AVERROR_PATCHWELCOME;
994 }
995 ffurl_write(rt->rtsp_hd_out, send_content, send_content_length);
996 }
997 rt->last_cmd_time = av_gettime();
998
999 return 0;
1000 }
1001
1002 int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1003 const char *url, const char *headers)
1004 {
1005 return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1006 }
1007
1008 int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1009 const char *headers, RTSPMessageHeader *reply,
1010 unsigned char **content_ptr)
1011 {
1012 return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1013 content_ptr, NULL, 0);
1014 }
1015
1016 int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1017 const char *method, const char *url,
1018 const char *header,
1019 RTSPMessageHeader *reply,
1020 unsigned char **content_ptr,
1021 const unsigned char *send_content,
1022 int send_content_length)
1023 {
1024 RTSPState *rt = s->priv_data;
1025 HTTPAuthType cur_auth_type;
1026 int ret;
1027
1028 retry:
1029 cur_auth_type = rt->auth_state.auth_type;
1030 if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
1031 send_content,
1032 send_content_length)))
1033 return ret;
1034
1035 if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1036 return ret;
1037
1038 if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
1039 rt->auth_state.auth_type != HTTP_AUTH_NONE)
1040 goto retry;
1041
1042 if (reply->status_code > 400){
1043 av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1044 method,
1045 reply->status_code,
1046 reply->reason);
1047 av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1048 }
1049
1050 return 0;
1051 }
1052
1053 /**
1054 * @return 0 on success, <0 on error, 1 if protocol is unavailable.
1055 */
1056 int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1057 int lower_transport, const char *real_challenge)
1058 {
1059 RTSPState *rt = s->priv_data;
1060 int rtx, j, i, err, interleave = 0;
1061 RTSPStream *rtsp_st;
1062 RTSPMessageHeader reply1, *reply = &reply1;
1063 char cmd[2048];
1064 const char *trans_pref;
1065
1066 if (rt->transport == RTSP_TRANSPORT_RDT)
1067 trans_pref = "x-pn-tng";
1068 else
1069 trans_pref = "RTP/AVP";
1070
1071 /* default timeout: 1 minute */
1072 rt->timeout = 60;
1073
1074 /* for each stream, make the setup request */
1075 /* XXX: we assume the same server is used for the control of each
1076 * RTSP stream */
1077
1078 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1079 char transport[2048];
1080
1081 /**
1082 * WMS serves all UDP data over a single connection, the RTX, which
1083 * isn't necessarily the first in the SDP but has to be the first
1084 * to be set up, else the second/third SETUP will fail with a 461.
1085 */
1086 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1087 rt->server_type == RTSP_SERVER_WMS) {
1088 if (i == 0) {
1089 /* rtx first */
1090 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1091 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1092 if (len >= 4 &&
1093 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1094 "/rtx"))
1095 break;
1096 }
1097 if (rtx == rt->nb_rtsp_streams)
1098 return -1; /* no RTX found */
1099 rtsp_st = rt->rtsp_streams[rtx];
1100 } else
1101 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1102 } else
1103 rtsp_st = rt->rtsp_streams[i];
1104
1105 /* RTP/UDP */
1106 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1107 char buf[256];
1108
1109 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1110 port = reply->transports[0].client_port_min;
1111 goto have_port;
1112 }
1113
1114 /* first try in specified port range */
1115 if (RTSP_RTP_PORT_MIN != 0) {
1116 while (j <= RTSP_RTP_PORT_MAX) {
1117 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1118 "?localport=%d", j);
1119 /* we will use two ports per rtp stream (rtp and rtcp) */
1120 j += 2;
1121 if (ffurl_open(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE) == 0)
1122 goto rtp_opened;
1123 }
1124 }
1125
1126 #if 0
1127 /* then try on any port */
1128 if (ffurl_open(&rtsp_st->rtp_handle, "rtp://", AVIO_FLAG_READ) < 0) {
1129 err = AVERROR_INVALIDDATA;
1130 goto fail;
1131 }
1132 #else
1133 av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1134 err = AVERROR(EIO);
1135 goto fail;
1136 #endif
1137
1138 rtp_opened:
1139 port = rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1140 have_port:
1141 snprintf(transport, sizeof(transport) - 1,
1142 "%s/UDP;", trans_pref);
1143 if (rt->server_type != RTSP_SERVER_REAL)
1144 av_strlcat(transport, "unicast;", sizeof(transport));
1145 av_strlcatf(transport, sizeof(transport),
1146 "client_port=%d", port);
1147 if (rt->transport == RTSP_TRANSPORT_RTP &&
1148 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1149 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1150 }
1151
1152 /* RTP/TCP */
1153 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1154 /** For WMS streams, the application streams are only used for
1155 * UDP. When trying to set it up for TCP streams, the server
1156 * will return an error. Therefore, we skip those streams. */
1157 if (rt->server_type == RTSP_SERVER_WMS &&
1158 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1159 AVMEDIA_TYPE_DATA)
1160 continue;
1161 snprintf(transport, sizeof(transport) - 1,
1162 "%s/TCP;", trans_pref);
1163 if (rt->transport != RTSP_TRANSPORT_RDT)
1164 av_strlcat(transport, "unicast;", sizeof(transport));
1165 av_strlcatf(transport, sizeof(transport),
1166 "interleaved=%d-%d",
1167 interleave, interleave + 1);
1168 interleave += 2;
1169 }
1170
1171 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1172 snprintf(transport, sizeof(transport) - 1,
1173 "%s/UDP;multicast", trans_pref);
1174 }
1175 if (s->oformat) {
1176 av_strlcat(transport, ";mode=receive", sizeof(transport));
1177 } else if (rt->server_type == RTSP_SERVER_REAL ||
1178 rt->server_type == RTSP_SERVER_WMS)
1179 av_strlcat(transport, ";mode=play", sizeof(transport));
1180 snprintf(cmd, sizeof(cmd),
1181 "Transport: %s\r\n",
1182 transport);
1183 if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1184 char real_res[41], real_csum[9];
1185 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1186 real_challenge);
1187 av_strlcatf(cmd, sizeof(cmd),
1188 "If-Match: %s\r\n"
1189 "RealChallenge2: %s, sd=%s\r\n",
1190 rt->session_id, real_res, real_csum);
1191 }
1192 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1193 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1194 err = 1;
1195 goto fail;
1196 } else if (reply->status_code != RTSP_STATUS_OK ||
1197 reply->nb_transports != 1) {
1198 err = AVERROR_INVALIDDATA;
1199 goto fail;
1200 }
1201
1202 /* XXX: same protocol for all streams is required */
1203 if (i > 0) {
1204 if (reply->transports[0].lower_transport != rt->lower_transport ||
1205 reply->transports[0].transport != rt->transport) {
1206 err = AVERROR_INVALIDDATA;
1207 goto fail;
1208 }
1209 } else {
1210 rt->lower_transport = reply->transports[0].lower_transport;
1211 rt->transport = reply->transports[0].transport;
1212 }
1213
1214 /* Fail if the server responded with another lower transport mode
1215 * than what we requested. */
1216 if (reply->transports[0].lower_transport != lower_transport) {
1217 av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1218 err = AVERROR_INVALIDDATA;
1219 goto fail;
1220 }
1221
1222 switch(reply->transports[0].lower_transport) {
1223 case RTSP_LOWER_TRANSPORT_TCP:
1224 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1225 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1226 break;
1227
1228 case RTSP_LOWER_TRANSPORT_UDP: {
1229 char url[1024], options[30] = "";
1230
1231 if (rt->filter_source)
1232 av_strlcpy(options, "?connect=1", sizeof(options));
1233 /* Use source address if specified */
1234 if (reply->transports[0].source[0]) {
1235 ff_url_join(url, sizeof(url), "rtp", NULL,
1236 reply->transports[0].source,
1237 reply->transports[0].server_port_min, options);
1238 } else {
1239 ff_url_join(url, sizeof(url), "rtp", NULL, host,
1240 reply->transports[0].server_port_min, options);
1241 }
1242 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1243 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1244 err = AVERROR_INVALIDDATA;
1245 goto fail;
1246 }
1247 /* Try to initialize the connection state in a
1248 * potential NAT router by sending dummy packets.
1249 * RTP/RTCP dummy packets are used for RDT, too.
1250 */
1251 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1252 CONFIG_RTPDEC)
1253 rtp_send_punch_packets(rtsp_st->rtp_handle);
1254 break;
1255 }
1256 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1257 char url[1024], namebuf[50];
1258 struct sockaddr_storage addr;
1259 int port, ttl;
1260
1261 if (reply->transports[0].destination.ss_family) {
1262 addr = reply->transports[0].destination;
1263 port = reply->transports[0].port_min;
1264 ttl = reply->transports[0].ttl;
1265 } else {
1266 addr = rtsp_st->sdp_ip;
1267 port = rtsp_st->sdp_port;
1268 ttl = rtsp_st->sdp_ttl;
1269 }
1270 getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1271 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1272 ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1273 port, "?ttl=%d", ttl);
1274 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE) < 0) {
1275 err = AVERROR_INVALIDDATA;
1276 goto fail;
1277 }
1278 break;
1279 }
1280 }
1281
1282 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1283 goto fail;
1284 }
1285
1286 if (reply->timeout > 0)
1287 rt->timeout = reply->timeout;
1288
1289 if (rt->server_type == RTSP_SERVER_REAL)
1290 rt->need_subscription = 1;
1291
1292 return 0;
1293
1294 fail:
1295 ff_rtsp_undo_setup(s);
1296 return err;
1297 }
1298
1299 void ff_rtsp_close_connections(AVFormatContext *s)
1300 {
1301 RTSPState *rt = s->priv_data;
1302 if (rt->rtsp_hd_out != rt->rtsp_hd) ffurl_close(rt->rtsp_hd_out);
1303 ffurl_close(rt->rtsp_hd);
1304 rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1305 }
1306
1307 int ff_rtsp_connect(AVFormatContext *s)
1308 {
1309 RTSPState *rt = s->priv_data;
1310 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1311 char *option_list, *option, *filename;
1312 int port, err, tcp_fd;
1313 RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1314 int lower_transport_mask = 0;
1315 char real_challenge[64] = "";
1316 struct sockaddr_storage peer;
1317 socklen_t peer_len = sizeof(peer);
1318
1319 if (!ff_network_init())
1320 return AVERROR(EIO);
1321 redirect:
1322 rt->control_transport = RTSP_MODE_PLAIN;
1323 /* extract hostname and port */
1324 av_url_split(NULL, 0, auth, sizeof(auth),
1325 host, sizeof(host), &port, path, sizeof(path), s->filename);
1326 if (*auth) {
1327 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1328 }
1329 if (port < 0)
1330 port = RTSP_DEFAULT_PORT;
1331
1332 /* search for options */
1333 option_list = strrchr(path, '?');
1334 if (option_list) {
1335 /* Strip out the RTSP specific options, write out the rest of
1336 * the options back into the same string. */
1337 filename = option_list;
1338 while (option_list) {
1339 /* move the option pointer */
1340 option = ++option_list;
1341 option_list = strchr(option_list, '&');
1342 if (option_list)
1343 *option_list = 0;
1344
1345 /* handle the options */
1346 if (!strcmp(option, "udp")) {
1347 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
1348 } else if (!strcmp(option, "multicast")) {
1349 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1350 } else if (!strcmp(option, "tcp")) {
1351 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1352 } else if(!strcmp(option, "http")) {
1353 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1354 rt->control_transport = RTSP_MODE_TUNNEL;
1355 } else if (!strcmp(option, "filter_src")) {
1356 rt->filter_source = 1;
1357 } else {
1358 /* Write options back into the buffer, using memmove instead
1359 * of strcpy since the strings may overlap. */
1360 int len = strlen(option);
1361 memmove(++filename, option, len);
1362 filename += len;
1363 if (option_list) *filename = '&';
1364 }
1365 }
1366 *filename = 0;
1367 }
1368
1369 if (!lower_transport_mask)
1370 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1371
1372 if (s->oformat) {
1373 /* Only UDP or TCP - UDP multicast isn't supported. */
1374 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1375 (1 << RTSP_LOWER_TRANSPORT_TCP);
1376 if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1377 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1378 "only UDP and TCP are supported for output.\n");
1379 err = AVERROR(EINVAL);
1380 goto fail;
1381 }
1382 }
1383
1384 /* Construct the URI used in request; this is similar to s->filename,
1385 * but with authentication credentials removed and RTSP specific options
1386 * stripped out. */
1387 ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1388 host, port, "%s", path);
1389
1390 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1391 /* set up initial handshake for tunneling */
1392 char httpname[1024];
1393 char sessioncookie[17];
1394 char headers[1024];
1395
1396 ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1397 snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1398 av_get_random_seed(), av_get_random_seed());
1399
1400 /* GET requests */
1401 if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ) < 0) {
1402 err = AVERROR(EIO);
1403 goto fail;
1404 }
1405
1406 /* generate GET headers */
1407 snprintf(headers, sizeof(headers),
1408 "x-sessioncookie: %s\r\n"
1409 "Accept: application/x-rtsp-tunnelled\r\n"
1410 "Pragma: no-cache\r\n"
1411 "Cache-Control: no-cache\r\n",
1412 sessioncookie);
1413 ff_http_set_headers(rt->rtsp_hd, headers);
1414
1415 /* complete the connection */
1416 if (ffurl_connect(rt->rtsp_hd)) {
1417 err = AVERROR(EIO);
1418 goto fail;
1419 }
1420
1421 /* POST requests */
1422 if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE) < 0 ) {
1423 err = AVERROR(EIO);
1424 goto fail;
1425 }
1426
1427 /* generate POST headers */
1428 snprintf(headers, sizeof(headers),
1429 "x-sessioncookie: %s\r\n"
1430 "Content-Type: application/x-rtsp-tunnelled\r\n"
1431 "Pragma: no-cache\r\n"
1432 "Cache-Control: no-cache\r\n"
1433 "Content-Length: 32767\r\n"
1434 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1435 sessioncookie);
1436 ff_http_set_headers(rt->rtsp_hd_out, headers);
1437 ff_http_set_chunked_transfer_encoding(rt->rtsp_hd_out, 0);
1438
1439 /* Initialize the authentication state for the POST session. The HTTP
1440 * protocol implementation doesn't properly handle multi-pass
1441 * authentication for POST requests, since it would require one of
1442 * the following:
1443 * - implementing Expect: 100-continue, which many HTTP servers
1444 * don't support anyway, even less the RTSP servers that do HTTP
1445 * tunneling
1446 * - sending the whole POST data until getting a 401 reply specifying
1447 * what authentication method to use, then resending all that data
1448 * - waiting for potential 401 replies directly after sending the
1449 * POST header (waiting for some unspecified time)
1450 * Therefore, we copy the full auth state, which works for both basic
1451 * and digest. (For digest, we would have to synchronize the nonce
1452 * count variable between the two sessions, if we'd do more requests
1453 * with the original session, though.)
1454 */
1455 ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1456
1457 /* complete the connection */
1458 if (ffurl_connect(rt->rtsp_hd_out)) {
1459 err = AVERROR(EIO);
1460 goto fail;
1461 }
1462 } else {
1463 /* open the tcp connection */
1464 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1465 if (ffurl_open(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE) < 0) {
1466 err = AVERROR(EIO);
1467 goto fail;
1468 }
1469 rt->rtsp_hd_out = rt->rtsp_hd;
1470 }
1471 rt->seq = 0;
1472
1473 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1474 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1475 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1476 NULL, 0, NI_NUMERICHOST);
1477 }
1478
1479 /* request options supported by the server; this also detects server
1480 * type */
1481 for (rt->server_type = RTSP_SERVER_RTP;;) {
1482 cmd[0] = 0;
1483 if (rt->server_type == RTSP_SERVER_REAL)
1484 av_strlcat(cmd,
1485 /**
1486 * The following entries are required for proper
1487 * streaming from a Realmedia server. They are
1488 * interdependent in some way although we currently
1489 * don't quite understand how. Values were copied
1490 * from mplayer SVN r23589.
1491 * @param CompanyID is a 16-byte ID in base64
1492 * @param ClientChallenge is a 16-byte ID in hex
1493 */
1494 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1495 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1496 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1497 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1498 sizeof(cmd));
1499 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1500 if (reply->status_code != RTSP_STATUS_OK) {
1501 err = AVERROR_INVALIDDATA;
1502 goto fail;
1503 }
1504
1505 /* detect server type if not standard-compliant RTP */
1506 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1507 rt->server_type = RTSP_SERVER_REAL;
1508 continue;
1509 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1510 rt->server_type = RTSP_SERVER_WMS;
1511 } else if (rt->server_type == RTSP_SERVER_REAL)
1512 strcpy(real_challenge, reply->real_challenge);
1513 break;
1514 }
1515
1516 if (s->iformat && CONFIG_RTSP_DEMUXER)
1517 err = ff_rtsp_setup_input_streams(s, reply);
1518 else if (CONFIG_RTSP_MUXER)
1519 err = ff_rtsp_setup_output_streams(s, host);
1520 if (err)
1521 goto fail;
1522
1523 do {
1524 int lower_transport = ff_log2_tab[lower_transport_mask &
1525 ~(lower_transport_mask - 1)];
1526
1527 err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1528 rt->server_type == RTSP_SERVER_REAL ?
1529 real_challenge : NULL);
1530 if (err < 0)
1531 goto fail;
1532 lower_transport_mask &= ~(1 << lower_transport);
1533 if (lower_transport_mask == 0 && err == 1) {
1534 err = AVERROR(EPROTONOSUPPORT);
1535 goto fail;
1536 }
1537 } while (err);
1538
1539 rt->lower_transport_mask = lower_transport_mask;
1540 av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1541 rt->state = RTSP_STATE_IDLE;
1542 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1543 return 0;
1544 fail:
1545 ff_rtsp_close_streams(s);
1546 ff_rtsp_close_connections(s);
1547 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1548 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1549 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1550 reply->status_code,
1551 s->filename);
1552 goto redirect;
1553 }
1554 ff_network_close();
1555 return err;
1556 }
1557 #endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1558
1559 #if CONFIG_RTPDEC
1560 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1561 uint8_t *buf, int buf_size, int64_t wait_end)
1562 {
1563 RTSPState *rt = s->priv_data;
1564 RTSPStream *rtsp_st;
1565 int n, i, ret, tcp_fd, timeout_cnt = 0;
1566 int max_p = 0;
1567 struct pollfd *p = rt->p;
1568
1569 for (;;) {
1570 if (url_interrupt_cb())
1571 return AVERROR_EXIT;
1572 if (wait_end && wait_end - av_gettime() < 0)
1573 return AVERROR(EAGAIN);
1574 max_p = 0;
1575 if (rt->rtsp_hd) {
1576 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1577 p[max_p].fd = tcp_fd;
1578 p[max_p++].events = POLLIN;
1579 } else {
1580 tcp_fd = -1;
1581 }
1582 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1583 rtsp_st = rt->rtsp_streams[i];
1584 if (rtsp_st->rtp_handle) {
1585 p[max_p].fd = ffurl_get_file_handle(rtsp_st->rtp_handle);
1586 p[max_p++].events = POLLIN;
1587 p[max_p].fd = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1588 p[max_p++].events = POLLIN;
1589 }
1590 }
1591 n = poll(p, max_p, POLL_TIMEOUT_MS);
1592 if (n > 0) {
1593 int j = 1 - (tcp_fd == -1);
1594 timeout_cnt = 0;
1595 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1596 rtsp_st = rt->rtsp_streams[i];
1597 if (rtsp_st->rtp_handle) {
1598 if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
1599 ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size);
1600 if (ret > 0) {
1601 *prtsp_st = rtsp_st;
1602 return ret;
1603 }
1604 }
1605 j+=2;
1606 }
1607 }
1608 #if CONFIG_RTSP_DEMUXER
1609 if (tcp_fd != -1 && p[0].revents & POLLIN) {
1610 RTSPMessageHeader reply;
1611
1612 ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1613 if (ret < 0)
1614 return ret;
1615 /* XXX: parse message */
1616 if (rt->state != RTSP_STATE_STREAMING)
1617 return 0;
1618 }
1619 #endif
1620 } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1621 return AVERROR(ETIMEDOUT);
1622 } else if (n < 0 && errno != EINTR)
1623 return AVERROR(errno);
1624 }
1625 }
1626
1627 int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1628 {
1629 RTSPState *rt = s->priv_data;
1630 int ret, len;
1631 RTSPStream *rtsp_st, *first_queue_st = NULL;
1632 int64_t wait_end = 0;
1633
1634 if (rt->nb_byes == rt->nb_rtsp_streams)
1635 return AVERROR_EOF;
1636
1637 /* get next frames from the same RTP packet */
1638 if (rt->cur_transport_priv) {
1639 if (rt->transport == RTSP_TRANSPORT_RDT) {
1640 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1641 } else
1642 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1643 if (ret == 0) {
1644 rt->cur_transport_priv = NULL;
1645 return 0;
1646 } else if (ret == 1) {
1647 return 0;
1648 } else
1649 rt->cur_transport_priv = NULL;
1650 }
1651
1652 if (rt->transport == RTSP_TRANSPORT_RTP) {
1653 int i;
1654 int64_t first_queue_time = 0;
1655 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1656 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1657 int64_t queue_time;
1658 if (!rtpctx)
1659 continue;
1660 queue_time = ff_rtp_queued_packet_time(rtpctx);
1661 if (queue_time && (queue_time - first_queue_time < 0 ||
1662 !first_queue_time)) {
1663 first_queue_time = queue_time;
1664 first_queue_st = rt->rtsp_streams[i];
1665 }
1666 }
1667 if (first_queue_time)
1668 wait_end = first_queue_time + s->max_delay;
1669 }
1670
1671 /* read next RTP packet */
1672 redo:
1673 if (!rt->recvbuf) {
1674 rt->recvbuf = av_malloc(RECVBUF_SIZE);
1675 if (!rt->recvbuf)
1676 return AVERROR(ENOMEM);
1677 }
1678
1679 switch(rt->lower_transport) {
1680 default:
1681 #if CONFIG_RTSP_DEMUXER
1682 case RTSP_LOWER_TRANSPORT_TCP:
1683 len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
1684 break;
1685 #endif
1686 case RTSP_LOWER_TRANSPORT_UDP:
1687 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1688 len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
1689 if (len > 0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1690 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1691 break;
1692 }
1693 if (len == AVERROR(EAGAIN) && first_queue_st &&
1694 rt->transport == RTSP_TRANSPORT_RTP) {
1695 rtsp_st = first_queue_st;
1696 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
1697 goto end;
1698 }
1699 if (len < 0)
1700 return len;
1701 if (len == 0)
1702 return AVERROR_EOF;
1703 if (rt->transport == RTSP_TRANSPORT_RDT) {
1704 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1705 } else {
1706 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1707 if (ret < 0) {
1708 /* Either bad packet, or a RTCP packet. Check if the
1709 * first_rtcp_ntp_time field was initialized. */
1710 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1711 if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1712 /* first_rtcp_ntp_time has been initialized for this stream,
1713 * copy the same value to all other uninitialized streams,
1714 * in order to map their timestamp origin to the same ntp time
1715 * as this one. */
1716 int i;
1717 AVStream *st = NULL;
1718 if (rtsp_st->stream_index >= 0)
1719 st = s->streams[rtsp_st->stream_index];
1720 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1721 RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
1722 AVStream *st2 = NULL;
1723 if (rt->rtsp_streams[i]->stream_index >= 0)
1724 st2 = s->streams[rt->rtsp_streams[i]->stream_index];
1725 if (rtpctx2 && st && st2 &&
1726 rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
1727 rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1728 rtpctx2->rtcp_ts_offset = av_rescale_q(
1729 rtpctx->rtcp_ts_offset, st->time_base,
1730 st2->time_base);
1731 }
1732 }
1733 }
1734 if (ret == -RTCP_BYE) {
1735 rt->nb_byes++;
1736
1737 av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1738 rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1739
1740 if (rt->nb_byes == rt->nb_rtsp_streams)
1741 return AVERROR_EOF;
1742 }
1743 }
1744 }
1745 end:
1746 if (ret < 0)
1747 goto redo;
1748 if (ret == 1)
1749 /* more packets may follow, so we save the RTP context */
1750 rt->cur_transport_priv = rtsp_st->transport_priv;
1751
1752 return ret;
1753 }
1754 #endif /* CONFIG_RTPDEC */
1755
1756 #if CONFIG_SDP_DEMUXER
1757 static int sdp_probe(AVProbeData *p1)
1758 {
1759 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1760
1761 /* we look for a line beginning "c=IN IP" */
1762 while (p < p_end && *p != '\0') {
1763 if (p + sizeof("c=IN IP") - 1 < p_end &&
1764 av_strstart(p, "c=IN IP", NULL))
1765 return AVPROBE_SCORE_MAX / 2;
1766
1767 while (p < p_end - 1 && *p != '\n') p++;
1768 if (++p >= p_end)
1769 break;
1770 if (*p == '\r')
1771 p++;
1772 }
1773 return 0;
1774 }
1775
1776 static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1777 {
1778 RTSPState *rt = s->priv_data;
1779 RTSPStream *rtsp_st;
1780 int size, i, err;
1781 char *content;
1782 char url[1024];
1783
1784 if (!ff_network_init())
1785 return AVERROR(EIO);
1786
1787 /* read the whole sdp file */
1788 /* XXX: better loading */
1789 content = av_malloc(SDP_MAX_SIZE);
1790 size = avio_read(s->pb, content, SDP_MAX_SIZE - 1);
1791 if (size <= 0) {
1792 av_free(content);
1793 return AVERROR_INVALIDDATA;
1794 }
1795 content[size] ='\0';
1796
1797 err = ff_sdp_parse(s, content);
1798 av_free(content);
1799 if (err) goto fail;
1800
1801 /* open each RTP stream */
1802 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1803 char namebuf[50];
1804 rtsp_st = rt->rtsp_streams[i];
1805
1806 getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
1807 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1808 ff_url_join(url, sizeof(url), "rtp", NULL,
1809 namebuf, rtsp_st->sdp_port,
1810 "?localport=%d&ttl=%d", rtsp_st->sdp_port,
1811 rtsp_st->sdp_ttl);
1812 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE) < 0) {
1813 err = AVERROR_INVALIDDATA;
1814 goto fail;
1815 }
1816 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1817 goto fail;
1818 }
1819 return 0;
1820 fail:
1821 ff_rtsp_close_streams(s);
1822 ff_network_close();
1823 return err;
1824 }
1825
1826 static int sdp_read_close(AVFormatContext *s)
1827 {
1828 ff_rtsp_close_streams(s);
1829 ff_network_close();
1830 return 0;
1831 }
1832
1833 AVInputFormat ff_sdp_demuxer = {
1834 "sdp",
1835 NULL_IF_CONFIG_SMALL("SDP"),
1836 sizeof(RTSPState),
1837 sdp_probe,
1838 sdp_read_header,
1839 ff_rtsp_fetch_packet,
1840 sdp_read_close,
1841 };
1842 #endif /* CONFIG_SDP_DEMUXER */
1843
1844 #if CONFIG_RTP_DEMUXER
1845 static int rtp_probe(AVProbeData *p)
1846 {
1847 if (av_strstart(p->filename, "rtp:", NULL))
1848 return AVPROBE_SCORE_MAX;
1849 return 0;
1850 }
1851
1852 static int rtp_read_header(AVFormatContext *s,
1853 AVFormatParameters *ap)
1854 {
1855 uint8_t recvbuf[1500];
1856 char host[500], sdp[500];
1857 int ret, port;
1858 URLContext* in = NULL;
1859 int payload_type;
1860 AVCodecContext codec;
1861 struct sockaddr_storage addr;
1862 AVIOContext pb;
1863 socklen_t addrlen = sizeof(addr);
1864
1865 if (!ff_network_init())
1866 return AVERROR(EIO);
1867
1868 ret = ffurl_open(&in, s->filename, AVIO_FLAG_READ);
1869 if (ret)
1870 goto fail;
1871
1872 while (1) {
1873 ret = ffurl_read(in, recvbuf, sizeof(recvbuf));
1874 if (ret == AVERROR(EAGAIN))
1875 continue;
1876 if (ret < 0)
1877 goto fail;
1878 if (ret < 12) {
1879 av_log(s, AV_LOG_WARNING, "Received too short packet\n");
1880 continue;
1881 }
1882
1883 if ((recvbuf[0] & 0xc0) != 0x80) {
1884 av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
1885 "received\n");
1886 continue;
1887 }
1888
1889 payload_type = recvbuf[1] & 0x7f;
1890 break;
1891 }
1892 getsockname(ffurl_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
1893 ffurl_close(in);
1894 in = NULL;
1895
1896 memset(&codec, 0, sizeof(codec));
1897 if (ff_rtp_get_codec_info(&codec, payload_type)) {
1898 av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
1899 "without an SDP file describing it\n",
1900 payload_type);
1901 goto fail;
1902 }
1903 if (codec.codec_type != AVMEDIA_TYPE_DATA) {
1904 av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
1905 "properly you need an SDP file "
1906 "describing it\n");
1907 }
1908
1909 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
1910 NULL, 0, s->filename);
1911
1912 snprintf(sdp, sizeof(sdp),
1913 "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
1914 addr.ss_family == AF_INET ? 4 : 6, host,
1915 codec.codec_type == AVMEDIA_TYPE_DATA ? "application" :
1916 codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
1917 port, payload_type);
1918 av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
1919
1920 ffio_init_context(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
1921 s->pb = &pb;
1922
1923 /* sdp_read_header initializes this again */
1924 ff_network_close();
1925
1926 ret = sdp_read_header(s, ap);
1927 s->pb = NULL;
1928 return ret;
1929
1930 fail:
1931 if (in)
1932 ffurl_close(in);
1933 ff_network_close();
1934 return ret;
1935 }
1936
1937 AVInputFormat ff_rtp_demuxer = {
1938 "rtp",
1939 NULL_IF_CONFIG_SMALL("RTP input format"),
1940 sizeof(RTSPState),
1941 rtp_probe,
1942 rtp_read_header,
1943 ff_rtsp_fetch_packet,
1944 sdp_read_close,
1945 .flags = AVFMT_NOFILE,
1946 };
1947 #endif /* CONFIG_RTP_DEMUXER */
1948