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ca9ce7cf21044901af2bc9ede54bfea3f087f41b
[libav.git] / libavformat / rtsp.c
1 /*
2 * RTSP/SDP client
3 * Copyright (c) 2002 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/base64.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/random_seed.h"
26 #include "avformat.h"
27
28 #include <sys/time.h>
29 #if HAVE_SYS_SELECT_H
30 #include <sys/select.h>
31 #endif
32 #include <strings.h>
33 #include "internal.h"
34 #include "network.h"
35 #include "os_support.h"
36 #include "http.h"
37 #include "rtsp.h"
38
39 #include "rtpdec.h"
40 #include "rdt.h"
41 #include "rtpdec_formats.h"
42 #include "rtpenc_chain.h"
43
44 //#define DEBUG
45 //#define DEBUG_RTP_TCP
46
47 /* Timeout values for socket select, in ms,
48 * and read_packet(), in seconds */
49 #define SELECT_TIMEOUT_MS 100
50 #define READ_PACKET_TIMEOUT_S 10
51 #define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / SELECT_TIMEOUT_MS
52 #define SDP_MAX_SIZE 16384
53 #define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
54
55 static void get_word_until_chars(char *buf, int buf_size,
56 const char *sep, const char **pp)
57 {
58 const char *p;
59 char *q;
60
61 p = *pp;
62 p += strspn(p, SPACE_CHARS);
63 q = buf;
64 while (!strchr(sep, *p) && *p != '\0') {
65 if ((q - buf) < buf_size - 1)
66 *q++ = *p;
67 p++;
68 }
69 if (buf_size > 0)
70 *q = '\0';
71 *pp = p;
72 }
73
74 static void get_word_sep(char *buf, int buf_size, const char *sep,
75 const char **pp)
76 {
77 if (**pp == '/') (*pp)++;
78 get_word_until_chars(buf, buf_size, sep, pp);
79 }
80
81 static void get_word(char *buf, int buf_size, const char **pp)
82 {
83 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
84 }
85
86 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
87 * and end time.
88 * Used for seeking in the rtp stream.
89 */
90 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
91 {
92 char buf[256];
93
94 p += strspn(p, SPACE_CHARS);
95 if (!av_stristart(p, "npt=", &p))
96 return;
97
98 *start = AV_NOPTS_VALUE;
99 *end = AV_NOPTS_VALUE;
100
101 get_word_sep(buf, sizeof(buf), "-", &p);
102 *start = parse_date(buf, 1);
103 if (*p == '-') {
104 p++;
105 get_word_sep(buf, sizeof(buf), "-", &p);
106 *end = parse_date(buf, 1);
107 }
108 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
109 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
110 }
111
112 static int get_sockaddr(const char *buf, struct sockaddr_storage *sock)
113 {
114 struct addrinfo hints, *ai = NULL;
115 memset(&hints, 0, sizeof(hints));
116 hints.ai_flags = AI_NUMERICHOST;
117 if (getaddrinfo(buf, NULL, &hints, &ai))
118 return -1;
119 memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
120 freeaddrinfo(ai);
121 return 0;
122 }
123
124 #if CONFIG_RTPDEC
125 static void init_rtp_handler(RTPDynamicProtocolHandler *handler,
126 RTSPStream *rtsp_st, AVCodecContext *codec)
127 {
128 if (!handler)
129 return;
130 codec->codec_id = handler->codec_id;
131 rtsp_st->dynamic_handler = handler;
132 if (handler->open)
133 rtsp_st->dynamic_protocol_context = handler->open();
134 }
135
136 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
137 static int sdp_parse_rtpmap(AVFormatContext *s,
138 AVStream *st, RTSPStream *rtsp_st,
139 int payload_type, const char *p)
140 {
141 AVCodecContext *codec = st->codec;
142 char buf[256];
143 int i;
144 AVCodec *c;
145 const char *c_name;
146
147 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
148 * see if we can handle this kind of payload.
149 * The space should normally not be there but some Real streams or
150 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
151 * have a trailing space. */
152 get_word_sep(buf, sizeof(buf), "/ ", &p);
153 if (payload_type >= RTP_PT_PRIVATE) {
154 RTPDynamicProtocolHandler *handler =
155 ff_rtp_handler_find_by_name(buf, codec->codec_type);
156 init_rtp_handler(handler, rtsp_st, codec);
157 /* If no dynamic handler was found, check with the list of standard
158 * allocated types, if such a stream for some reason happens to
159 * use a private payload type. This isn't handled in rtpdec.c, since
160 * the format name from the rtpmap line never is passed into rtpdec. */
161 if (!rtsp_st->dynamic_handler)
162 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
163 } else {
164 /* We are in a standard case
165 * (from http://www.iana.org/assignments/rtp-parameters). */
166 /* search into AVRtpPayloadTypes[] */
167 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
168 }
169
170 c = avcodec_find_decoder(codec->codec_id);
171 if (c && c->name)
172 c_name = c->name;
173 else
174 c_name = "(null)";
175
176 get_word_sep(buf, sizeof(buf), "/", &p);
177 i = atoi(buf);
178 switch (codec->codec_type) {
179 case AVMEDIA_TYPE_AUDIO:
180 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
181 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
182 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
183 if (i > 0) {
184 codec->sample_rate = i;
185 av_set_pts_info(st, 32, 1, codec->sample_rate);
186 get_word_sep(buf, sizeof(buf), "/", &p);
187 i = atoi(buf);
188 if (i > 0)
189 codec->channels = i;
190 // TODO: there is a bug here; if it is a mono stream, and
191 // less than 22000Hz, faad upconverts to stereo and twice
192 // the frequency. No problem, but the sample rate is being
193 // set here by the sdp line. Patch on its way. (rdm)
194 }
195 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
196 codec->sample_rate);
197 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
198 codec->channels);
199 break;
200 case AVMEDIA_TYPE_VIDEO:
201 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
202 if (i > 0)
203 av_set_pts_info(st, 32, 1, i);
204 break;
205 default:
206 break;
207 }
208 return 0;
209 }
210
211 /* parse the attribute line from the fmtp a line of an sdp response. This
212 * is broken out as a function because it is used in rtp_h264.c, which is
213 * forthcoming. */
214 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
215 char *value, int value_size)
216 {
217 *p += strspn(*p, SPACE_CHARS);
218 if (**p) {
219 get_word_sep(attr, attr_size, "=", p);
220 if (**p == '=')
221 (*p)++;
222 get_word_sep(value, value_size, ";", p);
223 if (**p == ';')
224 (*p)++;
225 return 1;
226 }
227 return 0;
228 }
229
230 typedef struct SDPParseState {
231 /* SDP only */
232 struct sockaddr_storage default_ip;
233 int default_ttl;
234 int skip_media; ///< set if an unknown m= line occurs
235 } SDPParseState;
236
237 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
238 int letter, const char *buf)
239 {
240 RTSPState *rt = s->priv_data;
241 char buf1[64], st_type[64];
242 const char *p;
243 enum AVMediaType codec_type;
244 int payload_type, i;
245 AVStream *st;
246 RTSPStream *rtsp_st;
247 struct sockaddr_storage sdp_ip;
248 int ttl;
249
250 dprintf(s, "sdp: %c='%s'\n", letter, buf);
251
252 p = buf;
253 if (s1->skip_media && letter != 'm')
254 return;
255 switch (letter) {
256 case 'c':
257 get_word(buf1, sizeof(buf1), &p);
258 if (strcmp(buf1, "IN") != 0)
259 return;
260 get_word(buf1, sizeof(buf1), &p);
261 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
262 return;
263 get_word_sep(buf1, sizeof(buf1), "/", &p);
264 if (get_sockaddr(buf1, &sdp_ip))
265 return;
266 ttl = 16;
267 if (*p == '/') {
268 p++;
269 get_word_sep(buf1, sizeof(buf1), "/", &p);
270 ttl = atoi(buf1);
271 }
272 if (s->nb_streams == 0) {
273 s1->default_ip = sdp_ip;
274 s1->default_ttl = ttl;
275 } else {
276 st = s->streams[s->nb_streams - 1];
277 rtsp_st = st->priv_data;
278 rtsp_st->sdp_ip = sdp_ip;
279 rtsp_st->sdp_ttl = ttl;
280 }
281 break;
282 case 's':
283 av_metadata_set2(&s->metadata, "title", p, 0);
284 break;
285 case 'i':
286 if (s->nb_streams == 0) {
287 av_metadata_set2(&s->metadata, "comment", p, 0);
288 break;
289 }
290 break;
291 case 'm':
292 /* new stream */
293 s1->skip_media = 0;
294 get_word(st_type, sizeof(st_type), &p);
295 if (!strcmp(st_type, "audio")) {
296 codec_type = AVMEDIA_TYPE_AUDIO;
297 } else if (!strcmp(st_type, "video")) {
298 codec_type = AVMEDIA_TYPE_VIDEO;
299 } else if (!strcmp(st_type, "application")) {
300 codec_type = AVMEDIA_TYPE_DATA;
301 } else {
302 s1->skip_media = 1;
303 return;
304 }
305 rtsp_st = av_mallocz(sizeof(RTSPStream));
306 if (!rtsp_st)
307 return;
308 rtsp_st->stream_index = -1;
309 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
310
311 rtsp_st->sdp_ip = s1->default_ip;
312 rtsp_st->sdp_ttl = s1->default_ttl;
313
314 get_word(buf1, sizeof(buf1), &p); /* port */
315 rtsp_st->sdp_port = atoi(buf1);
316
317 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
318
319 /* XXX: handle list of formats */
320 get_word(buf1, sizeof(buf1), &p); /* format list */
321 rtsp_st->sdp_payload_type = atoi(buf1);
322
323 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
324 /* no corresponding stream */
325 } else {
326 st = av_new_stream(s, 0);
327 if (!st)
328 return;
329 st->priv_data = rtsp_st;
330 rtsp_st->stream_index = st->index;
331 st->codec->codec_type = codec_type;
332 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
333 RTPDynamicProtocolHandler *handler;
334 /* if standard payload type, we can find the codec right now */
335 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
336 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
337 st->codec->sample_rate > 0)
338 av_set_pts_info(st, 32, 1, st->codec->sample_rate);
339 /* Even static payload types may need a custom depacketizer */
340 handler = ff_rtp_handler_find_by_id(
341 rtsp_st->sdp_payload_type, st->codec->codec_type);
342 init_rtp_handler(handler, rtsp_st, st->codec);
343 }
344 }
345 /* put a default control url */
346 av_strlcpy(rtsp_st->control_url, rt->control_uri,
347 sizeof(rtsp_st->control_url));
348 break;
349 case 'a':
350 if (av_strstart(p, "control:", &p)) {
351 if (s->nb_streams == 0) {
352 if (!strncmp(p, "rtsp://", 7))
353 av_strlcpy(rt->control_uri, p,
354 sizeof(rt->control_uri));
355 } else {
356 char proto[32];
357 /* get the control url */
358 st = s->streams[s->nb_streams - 1];
359 rtsp_st = st->priv_data;
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 = st->priv_data;
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 < s->nb_streams; i++) {
389 st = s->streams[i];
390 rtsp_st = st->priv_data;
391 if (rtsp_st->sdp_payload_type == payload_type &&
392 rtsp_st->dynamic_handler &&
393 rtsp_st->dynamic_handler->parse_sdp_a_line)
394 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
395 rtsp_st->dynamic_protocol_context, buf);
396 }
397 } else if (av_strstart(p, "range:", &p)) {
398 int64_t start, end;
399
400 // this is so that seeking on a streamed file can work.
401 rtsp_parse_range_npt(p, &start, &end);
402 s->start_time = start;
403 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
404 s->duration = (end == AV_NOPTS_VALUE) ?
405 AV_NOPTS_VALUE : end - start;
406 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
407 if (atoi(p) == 1)
408 rt->transport = RTSP_TRANSPORT_RDT;
409 } else if (av_strstart(p, "SampleRate:integer;", &p) &&
410 s->nb_streams > 0) {
411 st = s->streams[s->nb_streams - 1];
412 st->codec->sample_rate = atoi(p);
413 } else {
414 if (rt->server_type == RTSP_SERVER_WMS)
415 ff_wms_parse_sdp_a_line(s, p);
416 if (s->nb_streams > 0) {
417 if (rt->server_type == RTSP_SERVER_REAL)
418 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
419
420 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
421 if (rtsp_st->dynamic_handler &&
422 rtsp_st->dynamic_handler->parse_sdp_a_line)
423 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
424 s->nb_streams - 1,
425 rtsp_st->dynamic_protocol_context, buf);
426 }
427 }
428 break;
429 }
430 }
431
432 int ff_sdp_parse(AVFormatContext *s, const char *content)
433 {
434 const char *p;
435 int letter;
436 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
437 * contain long SDP lines containing complete ASF Headers (several
438 * kB) or arrays of MDPR (RM stream descriptor) headers plus
439 * "rulebooks" describing their properties. Therefore, the SDP line
440 * buffer is large.
441 *
442 * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
443 * in rtpdec_xiph.c. */
444 char buf[16384], *q;
445 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
446
447 memset(s1, 0, sizeof(SDPParseState));
448 p = content;
449 for (;;) {
450 p += strspn(p, SPACE_CHARS);
451 letter = *p;
452 if (letter == '\0')
453 break;
454 p++;
455 if (*p != '=')
456 goto next_line;
457 p++;
458 /* get the content */
459 q = buf;
460 while (*p != '\n' && *p != '\r' && *p != '\0') {
461 if ((q - buf) < sizeof(buf) - 1)
462 *q++ = *p;
463 p++;
464 }
465 *q = '\0';
466 sdp_parse_line(s, s1, letter, buf);
467 next_line:
468 while (*p != '\n' && *p != '\0')
469 p++;
470 if (*p == '\n')
471 p++;
472 }
473 return 0;
474 }
475 #endif /* CONFIG_RTPDEC */
476
477 void ff_rtsp_undo_setup(AVFormatContext *s)
478 {
479 RTSPState *rt = s->priv_data;
480 int i;
481
482 for (i = 0; i < rt->nb_rtsp_streams; i++) {
483 RTSPStream *rtsp_st = rt->rtsp_streams[i];
484 if (!rtsp_st)
485 continue;
486 if (rtsp_st->transport_priv) {
487 if (s->oformat) {
488 AVFormatContext *rtpctx = rtsp_st->transport_priv;
489 av_write_trailer(rtpctx);
490 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
491 uint8_t *ptr;
492 url_close_dyn_buf(rtpctx->pb, &ptr);
493 av_free(ptr);
494 } else {
495 url_fclose(rtpctx->pb);
496 }
497 av_metadata_free(&rtpctx->streams[0]->metadata);
498 av_metadata_free(&rtpctx->metadata);
499 av_free(rtpctx->streams[0]);
500 av_free(rtpctx);
501 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
502 ff_rdt_parse_close(rtsp_st->transport_priv);
503 else if (CONFIG_RTPDEC)
504 rtp_parse_close(rtsp_st->transport_priv);
505 }
506 rtsp_st->transport_priv = NULL;
507 if (rtsp_st->rtp_handle)
508 url_close(rtsp_st->rtp_handle);
509 rtsp_st->rtp_handle = NULL;
510 }
511 }
512
513 /* close and free RTSP streams */
514 void ff_rtsp_close_streams(AVFormatContext *s)
515 {
516 RTSPState *rt = s->priv_data;
517 int i;
518 RTSPStream *rtsp_st;
519
520 ff_rtsp_undo_setup(s);
521 for (i = 0; i < rt->nb_rtsp_streams; i++) {
522 rtsp_st = rt->rtsp_streams[i];
523 if (rtsp_st) {
524 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
525 rtsp_st->dynamic_handler->close(
526 rtsp_st->dynamic_protocol_context);
527 }
528 }
529 av_free(rt->rtsp_streams);
530 if (rt->asf_ctx) {
531 av_close_input_stream (rt->asf_ctx);
532 rt->asf_ctx = NULL;
533 }
534 av_free(rt->recvbuf);
535 }
536
537 static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
538 {
539 RTSPState *rt = s->priv_data;
540 AVStream *st = NULL;
541
542 /* open the RTP context */
543 if (rtsp_st->stream_index >= 0)
544 st = s->streams[rtsp_st->stream_index];
545 if (!st)
546 s->ctx_flags |= AVFMTCTX_NOHEADER;
547
548 if (s->oformat && CONFIG_RTSP_MUXER) {
549 rtsp_st->transport_priv = ff_rtp_chain_mux_open(s, st,
550 rtsp_st->rtp_handle,
551 RTSP_TCP_MAX_PACKET_SIZE);
552 /* Ownership of rtp_handle is passed to the rtp mux context */
553 rtsp_st->rtp_handle = NULL;
554 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
555 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
556 rtsp_st->dynamic_protocol_context,
557 rtsp_st->dynamic_handler);
558 else if (CONFIG_RTPDEC)
559 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
560 rtsp_st->sdp_payload_type,
561 (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
562 ? 0 : RTP_REORDER_QUEUE_DEFAULT_SIZE);
563
564 if (!rtsp_st->transport_priv) {
565 return AVERROR(ENOMEM);
566 } else if (rt->transport != RTSP_TRANSPORT_RDT && CONFIG_RTPDEC) {
567 if (rtsp_st->dynamic_handler) {
568 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
569 rtsp_st->dynamic_protocol_context,
570 rtsp_st->dynamic_handler);
571 }
572 }
573
574 return 0;
575 }
576
577 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
578 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
579 {
580 const char *p;
581 int v;
582
583 p = *pp;
584 p += strspn(p, SPACE_CHARS);
585 v = strtol(p, (char **)&p, 10);
586 if (*p == '-') {
587 p++;
588 *min_ptr = v;
589 v = strtol(p, (char **)&p, 10);
590 *max_ptr = v;
591 } else {
592 *min_ptr = v;
593 *max_ptr = v;
594 }
595 *pp = p;
596 }
597
598 /* XXX: only one transport specification is parsed */
599 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
600 {
601 char transport_protocol[16];
602 char profile[16];
603 char lower_transport[16];
604 char parameter[16];
605 RTSPTransportField *th;
606 char buf[256];
607
608 reply->nb_transports = 0;
609
610 for (;;) {
611 p += strspn(p, SPACE_CHARS);
612 if (*p == '\0')
613 break;
614
615 th = &reply->transports[reply->nb_transports];
616
617 get_word_sep(transport_protocol, sizeof(transport_protocol),
618 "/", &p);
619 if (!strcasecmp (transport_protocol, "rtp")) {
620 get_word_sep(profile, sizeof(profile), "/;,", &p);
621 lower_transport[0] = '\0';
622 /* rtp/avp/<protocol> */
623 if (*p == '/') {
624 get_word_sep(lower_transport, sizeof(lower_transport),
625 ";,", &p);
626 }
627 th->transport = RTSP_TRANSPORT_RTP;
628 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
629 !strcasecmp (transport_protocol, "x-real-rdt")) {
630 /* x-pn-tng/<protocol> */
631 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
632 profile[0] = '\0';
633 th->transport = RTSP_TRANSPORT_RDT;
634 }
635 if (!strcasecmp(lower_transport, "TCP"))
636 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
637 else
638 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
639
640 if (*p == ';')
641 p++;
642 /* get each parameter */
643 while (*p != '\0' && *p != ',') {
644 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
645 if (!strcmp(parameter, "port")) {
646 if (*p == '=') {
647 p++;
648 rtsp_parse_range(&th->port_min, &th->port_max, &p);
649 }
650 } else if (!strcmp(parameter, "client_port")) {
651 if (*p == '=') {
652 p++;
653 rtsp_parse_range(&th->client_port_min,
654 &th->client_port_max, &p);
655 }
656 } else if (!strcmp(parameter, "server_port")) {
657 if (*p == '=') {
658 p++;
659 rtsp_parse_range(&th->server_port_min,
660 &th->server_port_max, &p);
661 }
662 } else if (!strcmp(parameter, "interleaved")) {
663 if (*p == '=') {
664 p++;
665 rtsp_parse_range(&th->interleaved_min,
666 &th->interleaved_max, &p);
667 }
668 } else if (!strcmp(parameter, "multicast")) {
669 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
670 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
671 } else if (!strcmp(parameter, "ttl")) {
672 if (*p == '=') {
673 p++;
674 th->ttl = strtol(p, (char **)&p, 10);
675 }
676 } else if (!strcmp(parameter, "destination")) {
677 if (*p == '=') {
678 p++;
679 get_word_sep(buf, sizeof(buf), ";,", &p);
680 get_sockaddr(buf, &th->destination);
681 }
682 } else if (!strcmp(parameter, "source")) {
683 if (*p == '=') {
684 p++;
685 get_word_sep(buf, sizeof(buf), ";,", &p);
686 av_strlcpy(th->source, buf, sizeof(th->source));
687 }
688 }
689
690 while (*p != ';' && *p != '\0' && *p != ',')
691 p++;
692 if (*p == ';')
693 p++;
694 }
695 if (*p == ',')
696 p++;
697
698 reply->nb_transports++;
699 }
700 }
701
702 static void handle_rtp_info(RTSPState *rt, const char *url,
703 uint32_t seq, uint32_t rtptime)
704 {
705 int i;
706 if (!rtptime || !url[0])
707 return;
708 if (rt->transport != RTSP_TRANSPORT_RTP)
709 return;
710 for (i = 0; i < rt->nb_rtsp_streams; i++) {
711 RTSPStream *rtsp_st = rt->rtsp_streams[i];
712 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
713 if (!rtpctx)
714 continue;
715 if (!strcmp(rtsp_st->control_url, url)) {
716 rtpctx->base_timestamp = rtptime;
717 break;
718 }
719 }
720 }
721
722 static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
723 {
724 int read = 0;
725 char key[20], value[1024], url[1024] = "";
726 uint32_t seq = 0, rtptime = 0;
727
728 for (;;) {
729 p += strspn(p, SPACE_CHARS);
730 if (!*p)
731 break;
732 get_word_sep(key, sizeof(key), "=", &p);
733 if (*p != '=')
734 break;
735 p++;
736 get_word_sep(value, sizeof(value), ";, ", &p);
737 read++;
738 if (!strcmp(key, "url"))
739 av_strlcpy(url, value, sizeof(url));
740 else if (!strcmp(key, "seq"))
741 seq = strtol(value, NULL, 10);
742 else if (!strcmp(key, "rtptime"))
743 rtptime = strtol(value, NULL, 10);
744 if (*p == ',') {
745 handle_rtp_info(rt, url, seq, rtptime);
746 url[0] = '\0';
747 seq = rtptime = 0;
748 read = 0;
749 }
750 if (*p)
751 p++;
752 }
753 if (read > 0)
754 handle_rtp_info(rt, url, seq, rtptime);
755 }
756
757 void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
758 RTSPState *rt, const char *method)
759 {
760 const char *p;
761
762 /* NOTE: we do case independent match for broken servers */
763 p = buf;
764 if (av_stristart(p, "Session:", &p)) {
765 int t;
766 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
767 if (av_stristart(p, ";timeout=", &p) &&
768 (t = strtol(p, NULL, 10)) > 0) {
769 reply->timeout = t;
770 }
771 } else if (av_stristart(p, "Content-Length:", &p)) {
772 reply->content_length = strtol(p, NULL, 10);
773 } else if (av_stristart(p, "Transport:", &p)) {
774 rtsp_parse_transport(reply, p);
775 } else if (av_stristart(p, "CSeq:", &p)) {
776 reply->seq = strtol(p, NULL, 10);
777 } else if (av_stristart(p, "Range:", &p)) {
778 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
779 } else if (av_stristart(p, "RealChallenge1:", &p)) {
780 p += strspn(p, SPACE_CHARS);
781 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
782 } else if (av_stristart(p, "Server:", &p)) {
783 p += strspn(p, SPACE_CHARS);
784 av_strlcpy(reply->server, p, sizeof(reply->server));
785 } else if (av_stristart(p, "Notice:", &p) ||
786 av_stristart(p, "X-Notice:", &p)) {
787 reply->notice = strtol(p, NULL, 10);
788 } else if (av_stristart(p, "Location:", &p)) {
789 p += strspn(p, SPACE_CHARS);
790 av_strlcpy(reply->location, p , sizeof(reply->location));
791 } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
792 p += strspn(p, SPACE_CHARS);
793 ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
794 } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
795 p += strspn(p, SPACE_CHARS);
796 ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
797 } else if (av_stristart(p, "Content-Base:", &p) && rt) {
798 p += strspn(p, SPACE_CHARS);
799 if (method && !strcmp(method, "DESCRIBE"))
800 av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
801 } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
802 p += strspn(p, SPACE_CHARS);
803 if (method && !strcmp(method, "PLAY"))
804 rtsp_parse_rtp_info(rt, p);
805 }
806 }
807
808 /* skip a RTP/TCP interleaved packet */
809 void ff_rtsp_skip_packet(AVFormatContext *s)
810 {
811 RTSPState *rt = s->priv_data;
812 int ret, len, len1;
813 uint8_t buf[1024];
814
815 ret = url_read_complete(rt->rtsp_hd, buf, 3);
816 if (ret != 3)
817 return;
818 len = AV_RB16(buf + 1);
819
820 dprintf(s, "skipping RTP packet len=%d\n", len);
821
822 /* skip payload */
823 while (len > 0) {
824 len1 = len;
825 if (len1 > sizeof(buf))
826 len1 = sizeof(buf);
827 ret = url_read_complete(rt->rtsp_hd, buf, len1);
828 if (ret != len1)
829 return;
830 len -= len1;
831 }
832 }
833
834 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
835 unsigned char **content_ptr,
836 int return_on_interleaved_data, const char *method)
837 {
838 RTSPState *rt = s->priv_data;
839 char buf[4096], buf1[1024], *q;
840 unsigned char ch;
841 const char *p;
842 int ret, content_length, line_count = 0;
843 unsigned char *content = NULL;
844
845 memset(reply, 0, sizeof(*reply));
846
847 /* parse reply (XXX: use buffers) */
848 rt->last_reply[0] = '\0';
849 for (;;) {
850 q = buf;
851 for (;;) {
852 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
853 #ifdef DEBUG_RTP_TCP
854 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
855 #endif
856 if (ret != 1)
857 return AVERROR_EOF;
858 if (ch == '\n')
859 break;
860 if (ch == '$') {
861 /* XXX: only parse it if first char on line ? */
862 if (return_on_interleaved_data) {
863 return 1;
864 } else
865 ff_rtsp_skip_packet(s);
866 } else if (ch != '\r') {
867 if ((q - buf) < sizeof(buf) - 1)
868 *q++ = ch;
869 }
870 }
871 *q = '\0';
872
873 dprintf(s, "line='%s'\n", buf);
874
875 /* test if last line */
876 if (buf[0] == '\0')
877 break;
878 p = buf;
879 if (line_count == 0) {
880 /* get reply code */
881 get_word(buf1, sizeof(buf1), &p);
882 get_word(buf1, sizeof(buf1), &p);
883 reply->status_code = atoi(buf1);
884 av_strlcpy(reply->reason, p, sizeof(reply->reason));
885 } else {
886 ff_rtsp_parse_line(reply, p, rt, method);
887 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
888 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
889 }
890 line_count++;
891 }
892
893 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
894 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
895
896 content_length = reply->content_length;
897 if (content_length > 0) {
898 /* leave some room for a trailing '\0' (useful for simple parsing) */
899 content = av_malloc(content_length + 1);
900 (void)url_read_complete(rt->rtsp_hd, content, content_length);
901 content[content_length] = '\0';
902 }
903 if (content_ptr)
904 *content_ptr = content;
905 else
906 av_free(content);
907
908 if (rt->seq != reply->seq) {
909 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
910 rt->seq, reply->seq);
911 }
912
913 /* EOS */
914 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
915 reply->notice == 2104 /* Start-of-Stream Reached */ ||
916 reply->notice == 2306 /* Continuous Feed Terminated */) {
917 rt->state = RTSP_STATE_IDLE;
918 } else if (reply->notice >= 4400 && reply->notice < 5500) {
919 return AVERROR(EIO); /* data or server error */
920 } else if (reply->notice == 2401 /* Ticket Expired */ ||
921 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
922 return AVERROR(EPERM);
923
924 return 0;
925 }
926
927 int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
928 const char *method, const char *url,
929 const char *headers,
930 const unsigned char *send_content,
931 int send_content_length)
932 {
933 RTSPState *rt = s->priv_data;
934 char buf[4096], *out_buf;
935 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
936
937 /* Add in RTSP headers */
938 out_buf = buf;
939 rt->seq++;
940 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
941 if (headers)
942 av_strlcat(buf, headers, sizeof(buf));
943 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
944 if (rt->session_id[0] != '\0' && (!headers ||
945 !strstr(headers, "\nIf-Match:"))) {
946 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
947 }
948 if (rt->auth[0]) {
949 char *str = ff_http_auth_create_response(&rt->auth_state,
950 rt->auth, url, method);
951 if (str)
952 av_strlcat(buf, str, sizeof(buf));
953 av_free(str);
954 }
955 if (send_content_length > 0 && send_content)
956 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
957 av_strlcat(buf, "\r\n", sizeof(buf));
958
959 /* base64 encode rtsp if tunneling */
960 if (rt->control_transport == RTSP_MODE_TUNNEL) {
961 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
962 out_buf = base64buf;
963 }
964
965 dprintf(s, "Sending:\n%s--\n", buf);
966
967 url_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
968 if (send_content_length > 0 && send_content) {
969 if (rt->control_transport == RTSP_MODE_TUNNEL) {
970 av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
971 "with content data not supported\n");
972 return AVERROR_PATCHWELCOME;
973 }
974 url_write(rt->rtsp_hd_out, send_content, send_content_length);
975 }
976 rt->last_cmd_time = av_gettime();
977
978 return 0;
979 }
980
981 int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
982 const char *url, const char *headers)
983 {
984 return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
985 }
986
987 int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
988 const char *headers, RTSPMessageHeader *reply,
989 unsigned char **content_ptr)
990 {
991 return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
992 content_ptr, NULL, 0);
993 }
994
995 int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
996 const char *method, const char *url,
997 const char *header,
998 RTSPMessageHeader *reply,
999 unsigned char **content_ptr,
1000 const unsigned char *send_content,
1001 int send_content_length)
1002 {
1003 RTSPState *rt = s->priv_data;
1004 HTTPAuthType cur_auth_type;
1005 int ret;
1006
1007 retry:
1008 cur_auth_type = rt->auth_state.auth_type;
1009 if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
1010 send_content,
1011 send_content_length)))
1012 return ret;
1013
1014 if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1015 return ret;
1016
1017 if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
1018 rt->auth_state.auth_type != HTTP_AUTH_NONE)
1019 goto retry;
1020
1021 if (reply->status_code > 400){
1022 av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1023 method,
1024 reply->status_code,
1025 reply->reason);
1026 av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1027 }
1028
1029 return 0;
1030 }
1031
1032 /**
1033 * @return 0 on success, <0 on error, 1 if protocol is unavailable.
1034 */
1035 int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1036 int lower_transport, const char *real_challenge)
1037 {
1038 RTSPState *rt = s->priv_data;
1039 int rtx, j, i, err, interleave = 0;
1040 RTSPStream *rtsp_st;
1041 RTSPMessageHeader reply1, *reply = &reply1;
1042 char cmd[2048];
1043 const char *trans_pref;
1044
1045 if (rt->transport == RTSP_TRANSPORT_RDT)
1046 trans_pref = "x-pn-tng";
1047 else
1048 trans_pref = "RTP/AVP";
1049
1050 /* default timeout: 1 minute */
1051 rt->timeout = 60;
1052
1053 /* for each stream, make the setup request */
1054 /* XXX: we assume the same server is used for the control of each
1055 * RTSP stream */
1056
1057 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1058 char transport[2048];
1059
1060 /**
1061 * WMS serves all UDP data over a single connection, the RTX, which
1062 * isn't necessarily the first in the SDP but has to be the first
1063 * to be set up, else the second/third SETUP will fail with a 461.
1064 */
1065 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1066 rt->server_type == RTSP_SERVER_WMS) {
1067 if (i == 0) {
1068 /* rtx first */
1069 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1070 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1071 if (len >= 4 &&
1072 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1073 "/rtx"))
1074 break;
1075 }
1076 if (rtx == rt->nb_rtsp_streams)
1077 return -1; /* no RTX found */
1078 rtsp_st = rt->rtsp_streams[rtx];
1079 } else
1080 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1081 } else
1082 rtsp_st = rt->rtsp_streams[i];
1083
1084 /* RTP/UDP */
1085 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1086 char buf[256];
1087
1088 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1089 port = reply->transports[0].client_port_min;
1090 goto have_port;
1091 }
1092
1093 /* first try in specified port range */
1094 if (RTSP_RTP_PORT_MIN != 0) {
1095 while (j <= RTSP_RTP_PORT_MAX) {
1096 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1097 "?localport=%d", j);
1098 /* we will use two ports per rtp stream (rtp and rtcp) */
1099 j += 2;
1100 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1101 goto rtp_opened;
1102 }
1103 }
1104
1105 #if 0
1106 /* then try on any port */
1107 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1108 err = AVERROR_INVALIDDATA;
1109 goto fail;
1110 }
1111 #else
1112 av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1113 err = AVERROR(EIO);
1114 goto fail;
1115 #endif
1116
1117 rtp_opened:
1118 port = rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1119 have_port:
1120 snprintf(transport, sizeof(transport) - 1,
1121 "%s/UDP;", trans_pref);
1122 if (rt->server_type != RTSP_SERVER_REAL)
1123 av_strlcat(transport, "unicast;", sizeof(transport));
1124 av_strlcatf(transport, sizeof(transport),
1125 "client_port=%d", port);
1126 if (rt->transport == RTSP_TRANSPORT_RTP &&
1127 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1128 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1129 }
1130
1131 /* RTP/TCP */
1132 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1133 /** For WMS streams, the application streams are only used for
1134 * UDP. When trying to set it up for TCP streams, the server
1135 * will return an error. Therefore, we skip those streams. */
1136 if (rt->server_type == RTSP_SERVER_WMS &&
1137 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1138 AVMEDIA_TYPE_DATA)
1139 continue;
1140 snprintf(transport, sizeof(transport) - 1,
1141 "%s/TCP;", trans_pref);
1142 if (rt->server_type == RTSP_SERVER_WMS)
1143 av_strlcat(transport, "unicast;", sizeof(transport));
1144 av_strlcatf(transport, sizeof(transport),
1145 "interleaved=%d-%d",
1146 interleave, interleave + 1);
1147 interleave += 2;
1148 }
1149
1150 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1151 snprintf(transport, sizeof(transport) - 1,
1152 "%s/UDP;multicast", trans_pref);
1153 }
1154 if (s->oformat) {
1155 av_strlcat(transport, ";mode=receive", sizeof(transport));
1156 } else if (rt->server_type == RTSP_SERVER_REAL ||
1157 rt->server_type == RTSP_SERVER_WMS)
1158 av_strlcat(transport, ";mode=play", sizeof(transport));
1159 snprintf(cmd, sizeof(cmd),
1160 "Transport: %s\r\n",
1161 transport);
1162 if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1163 char real_res[41], real_csum[9];
1164 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1165 real_challenge);
1166 av_strlcatf(cmd, sizeof(cmd),
1167 "If-Match: %s\r\n"
1168 "RealChallenge2: %s, sd=%s\r\n",
1169 rt->session_id, real_res, real_csum);
1170 }
1171 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1172 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1173 err = 1;
1174 goto fail;
1175 } else if (reply->status_code != RTSP_STATUS_OK ||
1176 reply->nb_transports != 1) {
1177 err = AVERROR_INVALIDDATA;
1178 goto fail;
1179 }
1180
1181 /* XXX: same protocol for all streams is required */
1182 if (i > 0) {
1183 if (reply->transports[0].lower_transport != rt->lower_transport ||
1184 reply->transports[0].transport != rt->transport) {
1185 err = AVERROR_INVALIDDATA;
1186 goto fail;
1187 }
1188 } else {
1189 rt->lower_transport = reply->transports[0].lower_transport;
1190 rt->transport = reply->transports[0].transport;
1191 }
1192
1193 /* Fail if the server responded with another lower transport mode
1194 * than what we requested. */
1195 if (reply->transports[0].lower_transport != lower_transport) {
1196 av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1197 err = AVERROR_INVALIDDATA;
1198 goto fail;
1199 }
1200
1201 switch(reply->transports[0].lower_transport) {
1202 case RTSP_LOWER_TRANSPORT_TCP:
1203 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1204 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1205 break;
1206
1207 case RTSP_LOWER_TRANSPORT_UDP: {
1208 char url[1024], options[30] = "";
1209
1210 if (rt->filter_source)
1211 av_strlcpy(options, "?connect=1", sizeof(options));
1212 /* Use source address if specified */
1213 if (reply->transports[0].source[0]) {
1214 ff_url_join(url, sizeof(url), "rtp", NULL,
1215 reply->transports[0].source,
1216 reply->transports[0].server_port_min, options);
1217 } else {
1218 ff_url_join(url, sizeof(url), "rtp", NULL, host,
1219 reply->transports[0].server_port_min, options);
1220 }
1221 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1222 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1223 err = AVERROR_INVALIDDATA;
1224 goto fail;
1225 }
1226 /* Try to initialize the connection state in a
1227 * potential NAT router by sending dummy packets.
1228 * RTP/RTCP dummy packets are used for RDT, too.
1229 */
1230 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1231 CONFIG_RTPDEC)
1232 rtp_send_punch_packets(rtsp_st->rtp_handle);
1233 break;
1234 }
1235 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1236 char url[1024], namebuf[50];
1237 struct sockaddr_storage addr;
1238 int port, ttl;
1239
1240 if (reply->transports[0].destination.ss_family) {
1241 addr = reply->transports[0].destination;
1242 port = reply->transports[0].port_min;
1243 ttl = reply->transports[0].ttl;
1244 } else {
1245 addr = rtsp_st->sdp_ip;
1246 port = rtsp_st->sdp_port;
1247 ttl = rtsp_st->sdp_ttl;
1248 }
1249 getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1250 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1251 ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1252 port, "?ttl=%d", ttl);
1253 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1254 err = AVERROR_INVALIDDATA;
1255 goto fail;
1256 }
1257 break;
1258 }
1259 }
1260
1261 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1262 goto fail;
1263 }
1264
1265 if (reply->timeout > 0)
1266 rt->timeout = reply->timeout;
1267
1268 if (rt->server_type == RTSP_SERVER_REAL)
1269 rt->need_subscription = 1;
1270
1271 return 0;
1272
1273 fail:
1274 ff_rtsp_undo_setup(s);
1275 return err;
1276 }
1277
1278 void ff_rtsp_close_connections(AVFormatContext *s)
1279 {
1280 RTSPState *rt = s->priv_data;
1281 if (rt->rtsp_hd_out != rt->rtsp_hd) url_close(rt->rtsp_hd_out);
1282 url_close(rt->rtsp_hd);
1283 rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1284 }
1285
1286 int ff_rtsp_connect(AVFormatContext *s)
1287 {
1288 RTSPState *rt = s->priv_data;
1289 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1290 char *option_list, *option, *filename;
1291 int port, err, tcp_fd;
1292 RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1293 int lower_transport_mask = 0;
1294 char real_challenge[64] = "";
1295 struct sockaddr_storage peer;
1296 socklen_t peer_len = sizeof(peer);
1297
1298 if (!ff_network_init())
1299 return AVERROR(EIO);
1300 redirect:
1301 rt->control_transport = RTSP_MODE_PLAIN;
1302 /* extract hostname and port */
1303 av_url_split(NULL, 0, auth, sizeof(auth),
1304 host, sizeof(host), &port, path, sizeof(path), s->filename);
1305 if (*auth) {
1306 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1307 }
1308 if (port < 0)
1309 port = RTSP_DEFAULT_PORT;
1310
1311 /* search for options */
1312 option_list = strrchr(path, '?');
1313 if (option_list) {
1314 /* Strip out the RTSP specific options, write out the rest of
1315 * the options back into the same string. */
1316 filename = option_list;
1317 while (option_list) {
1318 /* move the option pointer */
1319 option = ++option_list;
1320 option_list = strchr(option_list, '&');
1321 if (option_list)
1322 *option_list = 0;
1323
1324 /* handle the options */
1325 if (!strcmp(option, "udp")) {
1326 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
1327 } else if (!strcmp(option, "multicast")) {
1328 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1329 } else if (!strcmp(option, "tcp")) {
1330 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1331 } else if(!strcmp(option, "http")) {
1332 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1333 rt->control_transport = RTSP_MODE_TUNNEL;
1334 } else if (!strcmp(option, "filter_src")) {
1335 rt->filter_source = 1;
1336 } else {
1337 /* Write options back into the buffer, using memmove instead
1338 * of strcpy since the strings may overlap. */
1339 int len = strlen(option);
1340 memmove(++filename, option, len);
1341 filename += len;
1342 if (option_list) *filename = '&';
1343 }
1344 }
1345 *filename = 0;
1346 }
1347
1348 if (!lower_transport_mask)
1349 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1350
1351 if (s->oformat) {
1352 /* Only UDP or TCP - UDP multicast isn't supported. */
1353 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1354 (1 << RTSP_LOWER_TRANSPORT_TCP);
1355 if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1356 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1357 "only UDP and TCP are supported for output.\n");
1358 err = AVERROR(EINVAL);
1359 goto fail;
1360 }
1361 }
1362
1363 /* Construct the URI used in request; this is similar to s->filename,
1364 * but with authentication credentials removed and RTSP specific options
1365 * stripped out. */
1366 ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1367 host, port, "%s", path);
1368
1369 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1370 /* set up initial handshake for tunneling */
1371 char httpname[1024];
1372 char sessioncookie[17];
1373 char headers[1024];
1374
1375 ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1376 snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1377 av_get_random_seed(), av_get_random_seed());
1378
1379 /* GET requests */
1380 if (url_alloc(&rt->rtsp_hd, httpname, URL_RDONLY) < 0) {
1381 err = AVERROR(EIO);
1382 goto fail;
1383 }
1384
1385 /* generate GET headers */
1386 snprintf(headers, sizeof(headers),
1387 "x-sessioncookie: %s\r\n"
1388 "Accept: application/x-rtsp-tunnelled\r\n"
1389 "Pragma: no-cache\r\n"
1390 "Cache-Control: no-cache\r\n",
1391 sessioncookie);
1392 ff_http_set_headers(rt->rtsp_hd, headers);
1393
1394 /* complete the connection */
1395 if (url_connect(rt->rtsp_hd)) {
1396 err = AVERROR(EIO);
1397 goto fail;
1398 }
1399
1400 /* POST requests */
1401 if (url_alloc(&rt->rtsp_hd_out, httpname, URL_WRONLY) < 0 ) {
1402 err = AVERROR(EIO);
1403 goto fail;
1404 }
1405
1406 /* generate POST headers */
1407 snprintf(headers, sizeof(headers),
1408 "x-sessioncookie: %s\r\n"
1409 "Content-Type: application/x-rtsp-tunnelled\r\n"
1410 "Pragma: no-cache\r\n"
1411 "Cache-Control: no-cache\r\n"
1412 "Content-Length: 32767\r\n"
1413 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1414 sessioncookie);
1415 ff_http_set_headers(rt->rtsp_hd_out, headers);
1416 ff_http_set_chunked_transfer_encoding(rt->rtsp_hd_out, 0);
1417
1418 /* Initialize the authentication state for the POST session. The HTTP
1419 * protocol implementation doesn't properly handle multi-pass
1420 * authentication for POST requests, since it would require one of
1421 * the following:
1422 * - implementing Expect: 100-continue, which many HTTP servers
1423 * don't support anyway, even less the RTSP servers that do HTTP
1424 * tunneling
1425 * - sending the whole POST data until getting a 401 reply specifying
1426 * what authentication method to use, then resending all that data
1427 * - waiting for potential 401 replies directly after sending the
1428 * POST header (waiting for some unspecified time)
1429 * Therefore, we copy the full auth state, which works for both basic
1430 * and digest. (For digest, we would have to synchronize the nonce
1431 * count variable between the two sessions, if we'd do more requests
1432 * with the original session, though.)
1433 */
1434 ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1435
1436 /* complete the connection */
1437 if (url_connect(rt->rtsp_hd_out)) {
1438 err = AVERROR(EIO);
1439 goto fail;
1440 }
1441 } else {
1442 /* open the tcp connection */
1443 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1444 if (url_open(&rt->rtsp_hd, tcpname, URL_RDWR) < 0) {
1445 err = AVERROR(EIO);
1446 goto fail;
1447 }
1448 rt->rtsp_hd_out = rt->rtsp_hd;
1449 }
1450 rt->seq = 0;
1451
1452 tcp_fd = url_get_file_handle(rt->rtsp_hd);
1453 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1454 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1455 NULL, 0, NI_NUMERICHOST);
1456 }
1457
1458 /* request options supported by the server; this also detects server
1459 * type */
1460 for (rt->server_type = RTSP_SERVER_RTP;;) {
1461 cmd[0] = 0;
1462 if (rt->server_type == RTSP_SERVER_REAL)
1463 av_strlcat(cmd,
1464 /**
1465 * The following entries are required for proper
1466 * streaming from a Realmedia server. They are
1467 * interdependent in some way although we currently
1468 * don't quite understand how. Values were copied
1469 * from mplayer SVN r23589.
1470 * @param CompanyID is a 16-byte ID in base64
1471 * @param ClientChallenge is a 16-byte ID in hex
1472 */
1473 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1474 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1475 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1476 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1477 sizeof(cmd));
1478 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1479 if (reply->status_code != RTSP_STATUS_OK) {
1480 err = AVERROR_INVALIDDATA;
1481 goto fail;
1482 }
1483
1484 /* detect server type if not standard-compliant RTP */
1485 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1486 rt->server_type = RTSP_SERVER_REAL;
1487 continue;
1488 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1489 rt->server_type = RTSP_SERVER_WMS;
1490 } else if (rt->server_type == RTSP_SERVER_REAL)
1491 strcpy(real_challenge, reply->real_challenge);
1492 break;
1493 }
1494
1495 if (s->iformat && CONFIG_RTSP_DEMUXER)
1496 err = ff_rtsp_setup_input_streams(s, reply);
1497 else if (CONFIG_RTSP_MUXER)
1498 err = ff_rtsp_setup_output_streams(s, host);
1499 if (err)
1500 goto fail;
1501
1502 do {
1503 int lower_transport = ff_log2_tab[lower_transport_mask &
1504 ~(lower_transport_mask - 1)];
1505
1506 err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1507 rt->server_type == RTSP_SERVER_REAL ?
1508 real_challenge : NULL);
1509 if (err < 0)
1510 goto fail;
1511 lower_transport_mask &= ~(1 << lower_transport);
1512 if (lower_transport_mask == 0 && err == 1) {
1513 err = FF_NETERROR(EPROTONOSUPPORT);
1514 goto fail;
1515 }
1516 } while (err);
1517
1518 rt->lower_transport_mask = lower_transport_mask;
1519 av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1520 rt->state = RTSP_STATE_IDLE;
1521 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1522 return 0;
1523 fail:
1524 ff_rtsp_close_streams(s);
1525 ff_rtsp_close_connections(s);
1526 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1527 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1528 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1529 reply->status_code,
1530 s->filename);
1531 goto redirect;
1532 }
1533 ff_network_close();
1534 return err;
1535 }
1536 #endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1537
1538 #if CONFIG_RTPDEC
1539 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1540 uint8_t *buf, int buf_size, int64_t wait_end)
1541 {
1542 RTSPState *rt = s->priv_data;
1543 RTSPStream *rtsp_st;
1544 fd_set rfds;
1545 int fd, fd_rtcp, fd_max, n, i, ret, tcp_fd, timeout_cnt = 0;
1546 struct timeval tv;
1547
1548 for (;;) {
1549 if (url_interrupt_cb())
1550 return AVERROR(EINTR);
1551 if (wait_end && wait_end - av_gettime() < 0)
1552 return AVERROR(EAGAIN);
1553 FD_ZERO(&rfds);
1554 if (rt->rtsp_hd) {
1555 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1556 FD_SET(tcp_fd, &rfds);
1557 } else {
1558 fd_max = 0;
1559 tcp_fd = -1;
1560 }
1561 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1562 rtsp_st = rt->rtsp_streams[i];
1563 if (rtsp_st->rtp_handle) {
1564 fd = url_get_file_handle(rtsp_st->rtp_handle);
1565 fd_rtcp = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1566 if (FFMAX(fd, fd_rtcp) > fd_max)
1567 fd_max = FFMAX(fd, fd_rtcp);
1568 FD_SET(fd, &rfds);
1569 FD_SET(fd_rtcp, &rfds);
1570 }
1571 }
1572 tv.tv_sec = 0;
1573 tv.tv_usec = SELECT_TIMEOUT_MS * 1000;
1574 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1575 if (n > 0) {
1576 timeout_cnt = 0;
1577 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1578 rtsp_st = rt->rtsp_streams[i];
1579 if (rtsp_st->rtp_handle) {
1580 fd = url_get_file_handle(rtsp_st->rtp_handle);
1581 fd_rtcp = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1582 if (FD_ISSET(fd_rtcp, &rfds) || FD_ISSET(fd, &rfds)) {
1583 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1584 if (ret > 0) {
1585 *prtsp_st = rtsp_st;
1586 return ret;
1587 }
1588 }
1589 }
1590 }
1591 #if CONFIG_RTSP_DEMUXER
1592 if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
1593 RTSPMessageHeader reply;
1594
1595 ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1596 if (ret < 0)
1597 return ret;
1598 /* XXX: parse message */
1599 if (rt->state != RTSP_STATE_STREAMING)
1600 return 0;
1601 }
1602 #endif
1603 } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1604 return FF_NETERROR(ETIMEDOUT);
1605 } else if (n < 0 && errno != EINTR)
1606 return AVERROR(errno);
1607 }
1608 }
1609
1610 int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1611 {
1612 RTSPState *rt = s->priv_data;
1613 int ret, len;
1614 RTSPStream *rtsp_st, *first_queue_st = NULL;
1615 int64_t wait_end = 0;
1616
1617 if (rt->nb_byes == rt->nb_rtsp_streams)
1618 return AVERROR_EOF;
1619
1620 /* get next frames from the same RTP packet */
1621 if (rt->cur_transport_priv) {
1622 if (rt->transport == RTSP_TRANSPORT_RDT) {
1623 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1624 } else
1625 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1626 if (ret == 0) {
1627 rt->cur_transport_priv = NULL;
1628 return 0;
1629 } else if (ret == 1) {
1630 return 0;
1631 } else
1632 rt->cur_transport_priv = NULL;
1633 }
1634
1635 if (rt->transport == RTSP_TRANSPORT_RTP) {
1636 int i;
1637 int64_t first_queue_time = 0;
1638 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1639 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1640 int64_t queue_time;
1641 if (!rtpctx)
1642 continue;
1643 queue_time = ff_rtp_queued_packet_time(rtpctx);
1644 if (queue_time && (queue_time - first_queue_time < 0 ||
1645 !first_queue_time)) {
1646 first_queue_time = queue_time;
1647 first_queue_st = rt->rtsp_streams[i];
1648 }
1649 }
1650 if (first_queue_time)
1651 wait_end = first_queue_time + s->max_delay;
1652 }
1653
1654 /* read next RTP packet */
1655 redo:
1656 if (!rt->recvbuf) {
1657 rt->recvbuf = av_malloc(RECVBUF_SIZE);
1658 if (!rt->recvbuf)
1659 return AVERROR(ENOMEM);
1660 }
1661
1662 switch(rt->lower_transport) {
1663 default:
1664 #if CONFIG_RTSP_DEMUXER
1665 case RTSP_LOWER_TRANSPORT_TCP:
1666 len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
1667 break;
1668 #endif
1669 case RTSP_LOWER_TRANSPORT_UDP:
1670 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1671 len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
1672 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1673 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1674 break;
1675 }
1676 if (len == AVERROR(EAGAIN) && first_queue_st &&
1677 rt->transport == RTSP_TRANSPORT_RTP) {
1678 rtsp_st = first_queue_st;
1679 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
1680 goto end;
1681 }
1682 if (len < 0)
1683 return len;
1684 if (len == 0)
1685 return AVERROR_EOF;
1686 if (rt->transport == RTSP_TRANSPORT_RDT) {
1687 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1688 } else {
1689 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1690 if (ret < 0) {
1691 /* Either bad packet, or a RTCP packet. Check if the
1692 * first_rtcp_ntp_time field was initialized. */
1693 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1694 if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1695 /* first_rtcp_ntp_time has been initialized for this stream,
1696 * copy the same value to all other uninitialized streams,
1697 * in order to map their timestamp origin to the same ntp time
1698 * as this one. */
1699 int i;
1700 AVStream *st = NULL;
1701 if (rtsp_st->stream_index >= 0)
1702 st = s->streams[rtsp_st->stream_index];
1703 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1704 RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
1705 AVStream *st2 = NULL;
1706 if (rt->rtsp_streams[i]->stream_index >= 0)
1707 st2 = s->streams[rt->rtsp_streams[i]->stream_index];
1708 if (rtpctx2 && st && st2 &&
1709 rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
1710 rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1711 rtpctx2->rtcp_ts_offset = av_rescale_q(
1712 rtpctx->rtcp_ts_offset, st->time_base,
1713 st2->time_base);
1714 }
1715 }
1716 }
1717 if (ret == -RTCP_BYE) {
1718 rt->nb_byes++;
1719
1720 av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1721 rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1722
1723 if (rt->nb_byes == rt->nb_rtsp_streams)
1724 return AVERROR_EOF;
1725 }
1726 }
1727 }
1728 end:
1729 if (ret < 0)
1730 goto redo;
1731 if (ret == 1)
1732 /* more packets may follow, so we save the RTP context */
1733 rt->cur_transport_priv = rtsp_st->transport_priv;
1734
1735 return ret;
1736 }
1737 #endif /* CONFIG_RTPDEC */
1738
1739 #if CONFIG_SDP_DEMUXER
1740 static int sdp_probe(AVProbeData *p1)
1741 {
1742 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1743
1744 /* we look for a line beginning "c=IN IP" */
1745 while (p < p_end && *p != '\0') {
1746 if (p + sizeof("c=IN IP") - 1 < p_end &&
1747 av_strstart(p, "c=IN IP", NULL))
1748 return AVPROBE_SCORE_MAX / 2;
1749
1750 while (p < p_end - 1 && *p != '\n') p++;
1751 if (++p >= p_end)
1752 break;
1753 if (*p == '\r')
1754 p++;
1755 }
1756 return 0;
1757 }
1758
1759 static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1760 {
1761 RTSPState *rt = s->priv_data;
1762 RTSPStream *rtsp_st;
1763 int size, i, err;
1764 char *content;
1765 char url[1024];
1766
1767 if (!ff_network_init())
1768 return AVERROR(EIO);
1769
1770 /* read the whole sdp file */
1771 /* XXX: better loading */
1772 content = av_malloc(SDP_MAX_SIZE);
1773 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1774 if (size <= 0) {
1775 av_free(content);
1776 return AVERROR_INVALIDDATA;
1777 }
1778 content[size] ='\0';
1779
1780 ff_sdp_parse(s, content);
1781 av_free(content);
1782
1783 /* open each RTP stream */
1784 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1785 char namebuf[50];
1786 rtsp_st = rt->rtsp_streams[i];
1787
1788 getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
1789 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1790 ff_url_join(url, sizeof(url), "rtp", NULL,
1791 namebuf, rtsp_st->sdp_port,
1792 "?localport=%d&ttl=%d", rtsp_st->sdp_port,
1793 rtsp_st->sdp_ttl);
1794 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1795 err = AVERROR_INVALIDDATA;
1796 goto fail;
1797 }
1798 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1799 goto fail;
1800 }
1801 return 0;
1802 fail:
1803 ff_rtsp_close_streams(s);
1804 ff_network_close();
1805 return err;
1806 }
1807
1808 static int sdp_read_close(AVFormatContext *s)
1809 {
1810 ff_rtsp_close_streams(s);
1811 ff_network_close();
1812 return 0;
1813 }
1814
1815 AVInputFormat sdp_demuxer = {
1816 "sdp",
1817 NULL_IF_CONFIG_SMALL("SDP"),
1818 sizeof(RTSPState),
1819 sdp_probe,
1820 sdp_read_header,
1821 ff_rtsp_fetch_packet,
1822 sdp_read_close,
1823 };
1824 #endif /* CONFIG_SDP_DEMUXER */
1825
1826 #if CONFIG_RTP_DEMUXER
1827 static int rtp_probe(AVProbeData *p)
1828 {
1829 if (av_strstart(p->filename, "rtp:", NULL))
1830 return AVPROBE_SCORE_MAX;
1831 return 0;
1832 }
1833
1834 static int rtp_read_header(AVFormatContext *s,
1835 AVFormatParameters *ap)
1836 {
1837 uint8_t recvbuf[1500];
1838 char host[500], sdp[500];
1839 int ret, port;
1840 URLContext* in = NULL;
1841 int payload_type;
1842 AVCodecContext codec;
1843 struct sockaddr_storage addr;
1844 ByteIOContext pb;
1845 socklen_t addrlen = sizeof(addr);
1846
1847 if (!ff_network_init())
1848 return AVERROR(EIO);
1849
1850 ret = url_open(&in, s->filename, URL_RDONLY);
1851 if (ret)
1852 goto fail;
1853
1854 while (1) {
1855 ret = url_read(in, recvbuf, sizeof(recvbuf));
1856 if (ret == AVERROR(EAGAIN))
1857 continue;
1858 if (ret < 0)
1859 goto fail;
1860 if (ret < 12) {
1861 av_log(s, AV_LOG_WARNING, "Received too short packet\n");
1862 continue;
1863 }
1864
1865 if ((recvbuf[0] & 0xc0) != 0x80) {
1866 av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
1867 "received\n");
1868 continue;
1869 }
1870
1871 payload_type = recvbuf[1] & 0x7f;
1872 break;
1873 }
1874 getsockname(url_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
1875 url_close(in);
1876 in = NULL;
1877
1878 memset(&codec, 0, sizeof(codec));
1879 if (ff_rtp_get_codec_info(&codec, payload_type)) {
1880 av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
1881 "without an SDP file describing it\n",
1882 payload_type);
1883 goto fail;
1884 }
1885 if (codec.codec_type != AVMEDIA_TYPE_DATA) {
1886 av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
1887 "properly you need an SDP file "
1888 "describing it\n");
1889 }
1890
1891 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
1892 NULL, 0, s->filename);
1893
1894 snprintf(sdp, sizeof(sdp),
1895 "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
1896 addr.ss_family == AF_INET ? 4 : 6, host,
1897 codec.codec_type == AVMEDIA_TYPE_DATA ? "application" :
1898 codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
1899 port, payload_type);
1900 av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
1901
1902 init_put_byte(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
1903 s->pb = &pb;
1904
1905 /* sdp_read_header initializes this again */
1906 ff_network_close();
1907
1908 ret = sdp_read_header(s, ap);
1909 s->pb = NULL;
1910 return ret;
1911
1912 fail:
1913 if (in)
1914 url_close(in);
1915 ff_network_close();
1916 return ret;
1917 }
1918
1919 AVInputFormat rtp_demuxer = {
1920 "rtp",
1921 NULL_IF_CONFIG_SMALL("RTP input format"),
1922 sizeof(RTSPState),
1923 rtp_probe,
1924 rtp_read_header,
1925 ff_rtsp_fetch_packet,
1926 sdp_read_close,
1927 .flags = AVFMT_NOFILE,
1928 };
1929 #endif /* CONFIG_RTP_DEMUXER */
1930
Libav master