time_internal: Prefix fallback versions of gmtime_r/localtime_r with ff_
[libav.git] / libavformat / rtsp.c
1 /*
2 * RTSP/SDP client
3 * Copyright (c) 2002 Fabrice Bellard
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/base64.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/mathematics.h"
26 #include "libavutil/parseutils.h"
27 #include "libavutil/random_seed.h"
28 #include "libavutil/dict.h"
29 #include "libavutil/opt.h"
30 #include "avformat.h"
31 #include "avio_internal.h"
32
33 #include <sys/time.h>
34 #if HAVE_POLL_H
35 #include <poll.h>
36 #endif
37 #include "internal.h"
38 #include "network.h"
39 #include "os_support.h"
40 #include "http.h"
41 #include "rtsp.h"
42
43 #include "rtpdec.h"
44 #include "rdt.h"
45 #include "rtpdec_formats.h"
46 #include "rtpenc_chain.h"
47 #include "url.h"
48 #include "rtpenc.h"
49
50 //#define DEBUG
51
52 /* Timeout values for socket poll, in ms,
53 * and read_packet(), in seconds */
54 #define POLL_TIMEOUT_MS 100
55 #define READ_PACKET_TIMEOUT_S 10
56 #define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / POLL_TIMEOUT_MS
57 #define SDP_MAX_SIZE 16384
58 #define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
59
60 #define OFFSET(x) offsetof(RTSPState, x)
61 #define DEC AV_OPT_FLAG_DECODING_PARAM
62 #define ENC AV_OPT_FLAG_ENCODING_PARAM
63
64 #define RTSP_FLAG_OPTS(name, longname) \
65 { name, longname, OFFSET(rtsp_flags), AV_OPT_TYPE_FLAGS, {0}, INT_MIN, INT_MAX, DEC, "rtsp_flags" }, \
66 { "filter_src", "Only receive packets from the negotiated peer IP", 0, AV_OPT_TYPE_CONST, {RTSP_FLAG_FILTER_SRC}, 0, 0, DEC, "rtsp_flags" }
67
68 #define RTSP_MEDIATYPE_OPTS(name, longname) \
69 { name, longname, OFFSET(media_type_mask), AV_OPT_TYPE_FLAGS, { (1 << (AVMEDIA_TYPE_DATA+1)) - 1 }, INT_MIN, INT_MAX, DEC, "allowed_media_types" }, \
70 { "video", "Video", 0, AV_OPT_TYPE_CONST, {1 << AVMEDIA_TYPE_VIDEO}, 0, 0, DEC, "allowed_media_types" }, \
71 { "audio", "Audio", 0, AV_OPT_TYPE_CONST, {1 << AVMEDIA_TYPE_AUDIO}, 0, 0, DEC, "allowed_media_types" }, \
72 { "data", "Data", 0, AV_OPT_TYPE_CONST, {1 << AVMEDIA_TYPE_DATA}, 0, 0, DEC, "allowed_media_types" }
73
74 const AVOption ff_rtsp_options[] = {
75 { "initial_pause", "Don't start playing the stream immediately", OFFSET(initial_pause), AV_OPT_TYPE_INT, {0}, 0, 1, DEC },
76 FF_RTP_FLAG_OPTS(RTSPState, rtp_muxer_flags),
77 { "rtsp_transport", "RTSP transport protocols", OFFSET(lower_transport_mask), AV_OPT_TYPE_FLAGS, {0}, INT_MIN, INT_MAX, DEC|ENC, "rtsp_transport" }, \
78 { "udp", "UDP", 0, AV_OPT_TYPE_CONST, {1 << RTSP_LOWER_TRANSPORT_UDP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
79 { "tcp", "TCP", 0, AV_OPT_TYPE_CONST, {1 << RTSP_LOWER_TRANSPORT_TCP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
80 { "udp_multicast", "UDP multicast", 0, AV_OPT_TYPE_CONST, {1 << RTSP_LOWER_TRANSPORT_UDP_MULTICAST}, 0, 0, DEC, "rtsp_transport" },
81 { "http", "HTTP tunneling", 0, AV_OPT_TYPE_CONST, {(1 << RTSP_LOWER_TRANSPORT_HTTP)}, 0, 0, DEC, "rtsp_transport" },
82 RTSP_FLAG_OPTS("rtsp_flags", "RTSP flags"),
83 RTSP_MEDIATYPE_OPTS("allowed_media_types", "Media types to accept from the server"),
84 { NULL },
85 };
86
87 static const AVOption sdp_options[] = {
88 RTSP_FLAG_OPTS("sdp_flags", "SDP flags"),
89 RTSP_MEDIATYPE_OPTS("allowed_media_types", "Media types to accept from the server"),
90 { NULL },
91 };
92
93 static const AVOption rtp_options[] = {
94 RTSP_FLAG_OPTS("rtp_flags", "RTP flags"),
95 { NULL },
96 };
97
98 static void get_word_until_chars(char *buf, int buf_size,
99 const char *sep, const char **pp)
100 {
101 const char *p;
102 char *q;
103
104 p = *pp;
105 p += strspn(p, SPACE_CHARS);
106 q = buf;
107 while (!strchr(sep, *p) && *p != '\0') {
108 if ((q - buf) < buf_size - 1)
109 *q++ = *p;
110 p++;
111 }
112 if (buf_size > 0)
113 *q = '\0';
114 *pp = p;
115 }
116
117 static void get_word_sep(char *buf, int buf_size, const char *sep,
118 const char **pp)
119 {
120 if (**pp == '/') (*pp)++;
121 get_word_until_chars(buf, buf_size, sep, pp);
122 }
123
124 static void get_word(char *buf, int buf_size, const char **pp)
125 {
126 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
127 }
128
129 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
130 * and end time.
131 * Used for seeking in the rtp stream.
132 */
133 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
134 {
135 char buf[256];
136
137 p += strspn(p, SPACE_CHARS);
138 if (!av_stristart(p, "npt=", &p))
139 return;
140
141 *start = AV_NOPTS_VALUE;
142 *end = AV_NOPTS_VALUE;
143
144 get_word_sep(buf, sizeof(buf), "-", &p);
145 av_parse_time(start, buf, 1);
146 if (*p == '-') {
147 p++;
148 get_word_sep(buf, sizeof(buf), "-", &p);
149 av_parse_time(end, buf, 1);
150 }
151 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
152 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
153 }
154
155 static int get_sockaddr(const char *buf, struct sockaddr_storage *sock)
156 {
157 struct addrinfo hints, *ai = NULL;
158 memset(&hints, 0, sizeof(hints));
159 hints.ai_flags = AI_NUMERICHOST;
160 if (getaddrinfo(buf, NULL, &hints, &ai))
161 return -1;
162 memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
163 freeaddrinfo(ai);
164 return 0;
165 }
166
167 #if CONFIG_RTPDEC
168 static void init_rtp_handler(RTPDynamicProtocolHandler *handler,
169 RTSPStream *rtsp_st, AVCodecContext *codec)
170 {
171 if (!handler)
172 return;
173 codec->codec_id = handler->codec_id;
174 rtsp_st->dynamic_handler = handler;
175 if (handler->alloc) {
176 rtsp_st->dynamic_protocol_context = handler->alloc();
177 if (!rtsp_st->dynamic_protocol_context)
178 rtsp_st->dynamic_handler = NULL;
179 }
180 }
181
182 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
183 static int sdp_parse_rtpmap(AVFormatContext *s,
184 AVStream *st, RTSPStream *rtsp_st,
185 int payload_type, const char *p)
186 {
187 AVCodecContext *codec = st->codec;
188 char buf[256];
189 int i;
190 AVCodec *c;
191 const char *c_name;
192
193 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
194 * see if we can handle this kind of payload.
195 * The space should normally not be there but some Real streams or
196 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
197 * have a trailing space. */
198 get_word_sep(buf, sizeof(buf), "/ ", &p);
199 if (payload_type >= RTP_PT_PRIVATE) {
200 RTPDynamicProtocolHandler *handler =
201 ff_rtp_handler_find_by_name(buf, codec->codec_type);
202 init_rtp_handler(handler, rtsp_st, codec);
203 /* If no dynamic handler was found, check with the list of standard
204 * allocated types, if such a stream for some reason happens to
205 * use a private payload type. This isn't handled in rtpdec.c, since
206 * the format name from the rtpmap line never is passed into rtpdec. */
207 if (!rtsp_st->dynamic_handler)
208 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
209 } else {
210 /* We are in a standard case
211 * (from http://www.iana.org/assignments/rtp-parameters). */
212 /* search into AVRtpPayloadTypes[] */
213 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
214 }
215
216 c = avcodec_find_decoder(codec->codec_id);
217 if (c && c->name)
218 c_name = c->name;
219 else
220 c_name = "(null)";
221
222 get_word_sep(buf, sizeof(buf), "/", &p);
223 i = atoi(buf);
224 switch (codec->codec_type) {
225 case AVMEDIA_TYPE_AUDIO:
226 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
227 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
228 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
229 if (i > 0) {
230 codec->sample_rate = i;
231 av_set_pts_info(st, 32, 1, codec->sample_rate);
232 get_word_sep(buf, sizeof(buf), "/", &p);
233 i = atoi(buf);
234 if (i > 0)
235 codec->channels = i;
236 // TODO: there is a bug here; if it is a mono stream, and
237 // less than 22000Hz, faad upconverts to stereo and twice
238 // the frequency. No problem, but the sample rate is being
239 // set here by the sdp line. Patch on its way. (rdm)
240 }
241 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
242 codec->sample_rate);
243 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
244 codec->channels);
245 break;
246 case AVMEDIA_TYPE_VIDEO:
247 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
248 if (i > 0)
249 av_set_pts_info(st, 32, 1, i);
250 break;
251 default:
252 break;
253 }
254 return 0;
255 }
256
257 /* parse the attribute line from the fmtp a line of an sdp response. This
258 * is broken out as a function because it is used in rtp_h264.c, which is
259 * forthcoming. */
260 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
261 char *value, int value_size)
262 {
263 *p += strspn(*p, SPACE_CHARS);
264 if (**p) {
265 get_word_sep(attr, attr_size, "=", p);
266 if (**p == '=')
267 (*p)++;
268 get_word_sep(value, value_size, ";", p);
269 if (**p == ';')
270 (*p)++;
271 return 1;
272 }
273 return 0;
274 }
275
276 typedef struct SDPParseState {
277 /* SDP only */
278 struct sockaddr_storage default_ip;
279 int default_ttl;
280 int skip_media; ///< set if an unknown m= line occurs
281 } SDPParseState;
282
283 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
284 int letter, const char *buf)
285 {
286 RTSPState *rt = s->priv_data;
287 char buf1[64], st_type[64];
288 const char *p;
289 enum AVMediaType codec_type;
290 int payload_type, i;
291 AVStream *st;
292 RTSPStream *rtsp_st;
293 struct sockaddr_storage sdp_ip;
294 int ttl;
295
296 av_dlog(s, "sdp: %c='%s'\n", letter, buf);
297
298 p = buf;
299 if (s1->skip_media && letter != 'm')
300 return;
301 switch (letter) {
302 case 'c':
303 get_word(buf1, sizeof(buf1), &p);
304 if (strcmp(buf1, "IN") != 0)
305 return;
306 get_word(buf1, sizeof(buf1), &p);
307 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
308 return;
309 get_word_sep(buf1, sizeof(buf1), "/", &p);
310 if (get_sockaddr(buf1, &sdp_ip))
311 return;
312 ttl = 16;
313 if (*p == '/') {
314 p++;
315 get_word_sep(buf1, sizeof(buf1), "/", &p);
316 ttl = atoi(buf1);
317 }
318 if (s->nb_streams == 0) {
319 s1->default_ip = sdp_ip;
320 s1->default_ttl = ttl;
321 } else {
322 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
323 rtsp_st->sdp_ip = sdp_ip;
324 rtsp_st->sdp_ttl = ttl;
325 }
326 break;
327 case 's':
328 av_dict_set(&s->metadata, "title", p, 0);
329 break;
330 case 'i':
331 if (s->nb_streams == 0) {
332 av_dict_set(&s->metadata, "comment", p, 0);
333 break;
334 }
335 break;
336 case 'm':
337 /* new stream */
338 s1->skip_media = 0;
339 codec_type = AVMEDIA_TYPE_UNKNOWN;
340 get_word(st_type, sizeof(st_type), &p);
341 if (!strcmp(st_type, "audio")) {
342 codec_type = AVMEDIA_TYPE_AUDIO;
343 } else if (!strcmp(st_type, "video")) {
344 codec_type = AVMEDIA_TYPE_VIDEO;
345 } else if (!strcmp(st_type, "application")) {
346 codec_type = AVMEDIA_TYPE_DATA;
347 }
348 if (codec_type == AVMEDIA_TYPE_UNKNOWN || !(rt->media_type_mask & (1 << codec_type))) {
349 s1->skip_media = 1;
350 return;
351 }
352 rtsp_st = av_mallocz(sizeof(RTSPStream));
353 if (!rtsp_st)
354 return;
355 rtsp_st->stream_index = -1;
356 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
357
358 rtsp_st->sdp_ip = s1->default_ip;
359 rtsp_st->sdp_ttl = s1->default_ttl;
360
361 get_word(buf1, sizeof(buf1), &p); /* port */
362 rtsp_st->sdp_port = atoi(buf1);
363
364 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
365
366 /* XXX: handle list of formats */
367 get_word(buf1, sizeof(buf1), &p); /* format list */
368 rtsp_st->sdp_payload_type = atoi(buf1);
369
370 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
371 /* no corresponding stream */
372 } else {
373 st = avformat_new_stream(s, NULL);
374 if (!st)
375 return;
376 st->id = rt->nb_rtsp_streams - 1;
377 rtsp_st->stream_index = st->index;
378 st->codec->codec_type = codec_type;
379 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
380 RTPDynamicProtocolHandler *handler;
381 /* if standard payload type, we can find the codec right now */
382 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
383 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
384 st->codec->sample_rate > 0)
385 av_set_pts_info(st, 32, 1, st->codec->sample_rate);
386 /* Even static payload types may need a custom depacketizer */
387 handler = ff_rtp_handler_find_by_id(
388 rtsp_st->sdp_payload_type, st->codec->codec_type);
389 init_rtp_handler(handler, rtsp_st, st->codec);
390 }
391 }
392 /* put a default control url */
393 av_strlcpy(rtsp_st->control_url, rt->control_uri,
394 sizeof(rtsp_st->control_url));
395 break;
396 case 'a':
397 if (av_strstart(p, "control:", &p)) {
398 if (s->nb_streams == 0) {
399 if (!strncmp(p, "rtsp://", 7))
400 av_strlcpy(rt->control_uri, p,
401 sizeof(rt->control_uri));
402 } else {
403 char proto[32];
404 /* get the control url */
405 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
406
407 /* XXX: may need to add full url resolution */
408 av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
409 NULL, NULL, 0, p);
410 if (proto[0] == '\0') {
411 /* relative control URL */
412 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
413 av_strlcat(rtsp_st->control_url, "/",
414 sizeof(rtsp_st->control_url));
415 av_strlcat(rtsp_st->control_url, p,
416 sizeof(rtsp_st->control_url));
417 } else
418 av_strlcpy(rtsp_st->control_url, p,
419 sizeof(rtsp_st->control_url));
420 }
421 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
422 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
423 get_word(buf1, sizeof(buf1), &p);
424 payload_type = atoi(buf1);
425 st = s->streams[s->nb_streams - 1];
426 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
427 sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
428 } else if (av_strstart(p, "fmtp:", &p) ||
429 av_strstart(p, "framesize:", &p)) {
430 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
431 // let dynamic protocol handlers have a stab at the line.
432 get_word(buf1, sizeof(buf1), &p);
433 payload_type = atoi(buf1);
434 for (i = 0; i < rt->nb_rtsp_streams; i++) {
435 rtsp_st = rt->rtsp_streams[i];
436 if (rtsp_st->sdp_payload_type == payload_type &&
437 rtsp_st->dynamic_handler &&
438 rtsp_st->dynamic_handler->parse_sdp_a_line)
439 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
440 rtsp_st->dynamic_protocol_context, buf);
441 }
442 } else if (av_strstart(p, "range:", &p)) {
443 int64_t start, end;
444
445 // this is so that seeking on a streamed file can work.
446 rtsp_parse_range_npt(p, &start, &end);
447 s->start_time = start;
448 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
449 s->duration = (end == AV_NOPTS_VALUE) ?
450 AV_NOPTS_VALUE : end - start;
451 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
452 if (atoi(p) == 1)
453 rt->transport = RTSP_TRANSPORT_RDT;
454 } else if (av_strstart(p, "SampleRate:integer;", &p) &&
455 s->nb_streams > 0) {
456 st = s->streams[s->nb_streams - 1];
457 st->codec->sample_rate = atoi(p);
458 } else {
459 if (rt->server_type == RTSP_SERVER_WMS)
460 ff_wms_parse_sdp_a_line(s, p);
461 if (s->nb_streams > 0) {
462 if (rt->server_type == RTSP_SERVER_REAL)
463 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
464
465 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
466 if (rtsp_st->dynamic_handler &&
467 rtsp_st->dynamic_handler->parse_sdp_a_line)
468 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
469 s->nb_streams - 1,
470 rtsp_st->dynamic_protocol_context, buf);
471 }
472 }
473 break;
474 }
475 }
476
477 int ff_sdp_parse(AVFormatContext *s, const char *content)
478 {
479 RTSPState *rt = s->priv_data;
480 const char *p;
481 int letter;
482 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
483 * contain long SDP lines containing complete ASF Headers (several
484 * kB) or arrays of MDPR (RM stream descriptor) headers plus
485 * "rulebooks" describing their properties. Therefore, the SDP line
486 * buffer is large.
487 *
488 * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
489 * in rtpdec_xiph.c. */
490 char buf[16384], *q;
491 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
492
493 memset(s1, 0, sizeof(SDPParseState));
494 p = content;
495 for (;;) {
496 p += strspn(p, SPACE_CHARS);
497 letter = *p;
498 if (letter == '\0')
499 break;
500 p++;
501 if (*p != '=')
502 goto next_line;
503 p++;
504 /* get the content */
505 q = buf;
506 while (*p != '\n' && *p != '\r' && *p != '\0') {
507 if ((q - buf) < sizeof(buf) - 1)
508 *q++ = *p;
509 p++;
510 }
511 *q = '\0';
512 sdp_parse_line(s, s1, letter, buf);
513 next_line:
514 while (*p != '\n' && *p != '\0')
515 p++;
516 if (*p == '\n')
517 p++;
518 }
519 rt->p = av_malloc(sizeof(struct pollfd)*2*(rt->nb_rtsp_streams+1));
520 if (!rt->p) return AVERROR(ENOMEM);
521 return 0;
522 }
523 #endif /* CONFIG_RTPDEC */
524
525 void ff_rtsp_undo_setup(AVFormatContext *s)
526 {
527 RTSPState *rt = s->priv_data;
528 int i;
529
530 for (i = 0; i < rt->nb_rtsp_streams; i++) {
531 RTSPStream *rtsp_st = rt->rtsp_streams[i];
532 if (!rtsp_st)
533 continue;
534 if (rtsp_st->transport_priv) {
535 if (s->oformat) {
536 AVFormatContext *rtpctx = rtsp_st->transport_priv;
537 av_write_trailer(rtpctx);
538 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
539 uint8_t *ptr;
540 avio_close_dyn_buf(rtpctx->pb, &ptr);
541 av_free(ptr);
542 } else {
543 avio_close(rtpctx->pb);
544 }
545 avformat_free_context(rtpctx);
546 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
547 ff_rdt_parse_close(rtsp_st->transport_priv);
548 else if (CONFIG_RTPDEC)
549 ff_rtp_parse_close(rtsp_st->transport_priv);
550 }
551 rtsp_st->transport_priv = NULL;
552 if (rtsp_st->rtp_handle)
553 ffurl_close(rtsp_st->rtp_handle);
554 rtsp_st->rtp_handle = NULL;
555 }
556 }
557
558 /* close and free RTSP streams */
559 void ff_rtsp_close_streams(AVFormatContext *s)
560 {
561 RTSPState *rt = s->priv_data;
562 int i;
563 RTSPStream *rtsp_st;
564
565 ff_rtsp_undo_setup(s);
566 for (i = 0; i < rt->nb_rtsp_streams; i++) {
567 rtsp_st = rt->rtsp_streams[i];
568 if (rtsp_st) {
569 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
570 rtsp_st->dynamic_handler->free(
571 rtsp_st->dynamic_protocol_context);
572 av_free(rtsp_st);
573 }
574 }
575 av_free(rt->rtsp_streams);
576 if (rt->asf_ctx) {
577 av_close_input_stream (rt->asf_ctx);
578 rt->asf_ctx = NULL;
579 }
580 av_free(rt->p);
581 av_free(rt->recvbuf);
582 }
583
584 static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
585 {
586 RTSPState *rt = s->priv_data;
587 AVStream *st = NULL;
588
589 /* open the RTP context */
590 if (rtsp_st->stream_index >= 0)
591 st = s->streams[rtsp_st->stream_index];
592 if (!st)
593 s->ctx_flags |= AVFMTCTX_NOHEADER;
594
595 if (s->oformat && CONFIG_RTSP_MUXER) {
596 rtsp_st->transport_priv = ff_rtp_chain_mux_open(s, st,
597 rtsp_st->rtp_handle,
598 RTSP_TCP_MAX_PACKET_SIZE);
599 /* Ownership of rtp_handle is passed to the rtp mux context */
600 rtsp_st->rtp_handle = NULL;
601 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
602 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
603 rtsp_st->dynamic_protocol_context,
604 rtsp_st->dynamic_handler);
605 else if (CONFIG_RTPDEC)
606 rtsp_st->transport_priv = ff_rtp_parse_open(s, st, rtsp_st->rtp_handle,
607 rtsp_st->sdp_payload_type,
608 (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
609 ? 0 : RTP_REORDER_QUEUE_DEFAULT_SIZE);
610
611 if (!rtsp_st->transport_priv) {
612 return AVERROR(ENOMEM);
613 } else if (rt->transport != RTSP_TRANSPORT_RDT && CONFIG_RTPDEC) {
614 if (rtsp_st->dynamic_handler) {
615 ff_rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
616 rtsp_st->dynamic_protocol_context,
617 rtsp_st->dynamic_handler);
618 }
619 }
620
621 return 0;
622 }
623
624 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
625 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
626 {
627 const char *p;
628 int v;
629
630 p = *pp;
631 p += strspn(p, SPACE_CHARS);
632 v = strtol(p, (char **)&p, 10);
633 if (*p == '-') {
634 p++;
635 *min_ptr = v;
636 v = strtol(p, (char **)&p, 10);
637 *max_ptr = v;
638 } else {
639 *min_ptr = v;
640 *max_ptr = v;
641 }
642 *pp = p;
643 }
644
645 /* XXX: only one transport specification is parsed */
646 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
647 {
648 char transport_protocol[16];
649 char profile[16];
650 char lower_transport[16];
651 char parameter[16];
652 RTSPTransportField *th;
653 char buf[256];
654
655 reply->nb_transports = 0;
656
657 for (;;) {
658 p += strspn(p, SPACE_CHARS);
659 if (*p == '\0')
660 break;
661
662 th = &reply->transports[reply->nb_transports];
663
664 get_word_sep(transport_protocol, sizeof(transport_protocol),
665 "/", &p);
666 if (!av_strcasecmp (transport_protocol, "rtp")) {
667 get_word_sep(profile, sizeof(profile), "/;,", &p);
668 lower_transport[0] = '\0';
669 /* rtp/avp/<protocol> */
670 if (*p == '/') {
671 get_word_sep(lower_transport, sizeof(lower_transport),
672 ";,", &p);
673 }
674 th->transport = RTSP_TRANSPORT_RTP;
675 } else if (!av_strcasecmp (transport_protocol, "x-pn-tng") ||
676 !av_strcasecmp (transport_protocol, "x-real-rdt")) {
677 /* x-pn-tng/<protocol> */
678 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
679 profile[0] = '\0';
680 th->transport = RTSP_TRANSPORT_RDT;
681 }
682 if (!av_strcasecmp(lower_transport, "TCP"))
683 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
684 else
685 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
686
687 if (*p == ';')
688 p++;
689 /* get each parameter */
690 while (*p != '\0' && *p != ',') {
691 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
692 if (!strcmp(parameter, "port")) {
693 if (*p == '=') {
694 p++;
695 rtsp_parse_range(&th->port_min, &th->port_max, &p);
696 }
697 } else if (!strcmp(parameter, "client_port")) {
698 if (*p == '=') {
699 p++;
700 rtsp_parse_range(&th->client_port_min,
701 &th->client_port_max, &p);
702 }
703 } else if (!strcmp(parameter, "server_port")) {
704 if (*p == '=') {
705 p++;
706 rtsp_parse_range(&th->server_port_min,
707 &th->server_port_max, &p);
708 }
709 } else if (!strcmp(parameter, "interleaved")) {
710 if (*p == '=') {
711 p++;
712 rtsp_parse_range(&th->interleaved_min,
713 &th->interleaved_max, &p);
714 }
715 } else if (!strcmp(parameter, "multicast")) {
716 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
717 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
718 } else if (!strcmp(parameter, "ttl")) {
719 if (*p == '=') {
720 p++;
721 th->ttl = strtol(p, (char **)&p, 10);
722 }
723 } else if (!strcmp(parameter, "destination")) {
724 if (*p == '=') {
725 p++;
726 get_word_sep(buf, sizeof(buf), ";,", &p);
727 get_sockaddr(buf, &th->destination);
728 }
729 } else if (!strcmp(parameter, "source")) {
730 if (*p == '=') {
731 p++;
732 get_word_sep(buf, sizeof(buf), ";,", &p);
733 av_strlcpy(th->source, buf, sizeof(th->source));
734 }
735 }
736
737 while (*p != ';' && *p != '\0' && *p != ',')
738 p++;
739 if (*p == ';')
740 p++;
741 }
742 if (*p == ',')
743 p++;
744
745 reply->nb_transports++;
746 }
747 }
748
749 static void handle_rtp_info(RTSPState *rt, const char *url,
750 uint32_t seq, uint32_t rtptime)
751 {
752 int i;
753 if (!rtptime || !url[0])
754 return;
755 if (rt->transport != RTSP_TRANSPORT_RTP)
756 return;
757 for (i = 0; i < rt->nb_rtsp_streams; i++) {
758 RTSPStream *rtsp_st = rt->rtsp_streams[i];
759 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
760 if (!rtpctx)
761 continue;
762 if (!strcmp(rtsp_st->control_url, url)) {
763 rtpctx->base_timestamp = rtptime;
764 break;
765 }
766 }
767 }
768
769 static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
770 {
771 int read = 0;
772 char key[20], value[1024], url[1024] = "";
773 uint32_t seq = 0, rtptime = 0;
774
775 for (;;) {
776 p += strspn(p, SPACE_CHARS);
777 if (!*p)
778 break;
779 get_word_sep(key, sizeof(key), "=", &p);
780 if (*p != '=')
781 break;
782 p++;
783 get_word_sep(value, sizeof(value), ";, ", &p);
784 read++;
785 if (!strcmp(key, "url"))
786 av_strlcpy(url, value, sizeof(url));
787 else if (!strcmp(key, "seq"))
788 seq = strtoul(value, NULL, 10);
789 else if (!strcmp(key, "rtptime"))
790 rtptime = strtoul(value, NULL, 10);
791 if (*p == ',') {
792 handle_rtp_info(rt, url, seq, rtptime);
793 url[0] = '\0';
794 seq = rtptime = 0;
795 read = 0;
796 }
797 if (*p)
798 p++;
799 }
800 if (read > 0)
801 handle_rtp_info(rt, url, seq, rtptime);
802 }
803
804 void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
805 RTSPState *rt, const char *method)
806 {
807 const char *p;
808
809 /* NOTE: we do case independent match for broken servers */
810 p = buf;
811 if (av_stristart(p, "Session:", &p)) {
812 int t;
813 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
814 if (av_stristart(p, ";timeout=", &p) &&
815 (t = strtol(p, NULL, 10)) > 0) {
816 reply->timeout = t;
817 }
818 } else if (av_stristart(p, "Content-Length:", &p)) {
819 reply->content_length = strtol(p, NULL, 10);
820 } else if (av_stristart(p, "Transport:", &p)) {
821 rtsp_parse_transport(reply, p);
822 } else if (av_stristart(p, "CSeq:", &p)) {
823 reply->seq = strtol(p, NULL, 10);
824 } else if (av_stristart(p, "Range:", &p)) {
825 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
826 } else if (av_stristart(p, "RealChallenge1:", &p)) {
827 p += strspn(p, SPACE_CHARS);
828 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
829 } else if (av_stristart(p, "Server:", &p)) {
830 p += strspn(p, SPACE_CHARS);
831 av_strlcpy(reply->server, p, sizeof(reply->server));
832 } else if (av_stristart(p, "Notice:", &p) ||
833 av_stristart(p, "X-Notice:", &p)) {
834 reply->notice = strtol(p, NULL, 10);
835 } else if (av_stristart(p, "Location:", &p)) {
836 p += strspn(p, SPACE_CHARS);
837 av_strlcpy(reply->location, p , sizeof(reply->location));
838 } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
839 p += strspn(p, SPACE_CHARS);
840 ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
841 } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
842 p += strspn(p, SPACE_CHARS);
843 ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
844 } else if (av_stristart(p, "Content-Base:", &p) && rt) {
845 p += strspn(p, SPACE_CHARS);
846 if (method && !strcmp(method, "DESCRIBE"))
847 av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
848 } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
849 p += strspn(p, SPACE_CHARS);
850 if (method && !strcmp(method, "PLAY"))
851 rtsp_parse_rtp_info(rt, p);
852 } else if (av_stristart(p, "Public:", &p) && rt) {
853 if (strstr(p, "GET_PARAMETER") &&
854 method && !strcmp(method, "OPTIONS"))
855 rt->get_parameter_supported = 1;
856 } else if (av_stristart(p, "x-Accept-Dynamic-Rate:", &p) && rt) {
857 p += strspn(p, SPACE_CHARS);
858 rt->accept_dynamic_rate = atoi(p);
859 }
860 }
861
862 /* skip a RTP/TCP interleaved packet */
863 void ff_rtsp_skip_packet(AVFormatContext *s)
864 {
865 RTSPState *rt = s->priv_data;
866 int ret, len, len1;
867 uint8_t buf[1024];
868
869 ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
870 if (ret != 3)
871 return;
872 len = AV_RB16(buf + 1);
873
874 av_dlog(s, "skipping RTP packet len=%d\n", len);
875
876 /* skip payload */
877 while (len > 0) {
878 len1 = len;
879 if (len1 > sizeof(buf))
880 len1 = sizeof(buf);
881 ret = ffurl_read_complete(rt->rtsp_hd, buf, len1);
882 if (ret != len1)
883 return;
884 len -= len1;
885 }
886 }
887
888 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
889 unsigned char **content_ptr,
890 int return_on_interleaved_data, const char *method)
891 {
892 RTSPState *rt = s->priv_data;
893 char buf[4096], buf1[1024], *q;
894 unsigned char ch;
895 const char *p;
896 int ret, content_length, line_count = 0;
897 unsigned char *content = NULL;
898
899 memset(reply, 0, sizeof(*reply));
900
901 /* parse reply (XXX: use buffers) */
902 rt->last_reply[0] = '\0';
903 for (;;) {
904 q = buf;
905 for (;;) {
906 ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1);
907 av_dlog(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
908 if (ret != 1)
909 return AVERROR_EOF;
910 if (ch == '\n')
911 break;
912 if (ch == '$') {
913 /* XXX: only parse it if first char on line ? */
914 if (return_on_interleaved_data) {
915 return 1;
916 } else
917 ff_rtsp_skip_packet(s);
918 } else if (ch != '\r') {
919 if ((q - buf) < sizeof(buf) - 1)
920 *q++ = ch;
921 }
922 }
923 *q = '\0';
924
925 av_dlog(s, "line='%s'\n", buf);
926
927 /* test if last line */
928 if (buf[0] == '\0')
929 break;
930 p = buf;
931 if (line_count == 0) {
932 /* get reply code */
933 get_word(buf1, sizeof(buf1), &p);
934 get_word(buf1, sizeof(buf1), &p);
935 reply->status_code = atoi(buf1);
936 av_strlcpy(reply->reason, p, sizeof(reply->reason));
937 } else {
938 ff_rtsp_parse_line(reply, p, rt, method);
939 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
940 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
941 }
942 line_count++;
943 }
944
945 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
946 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
947
948 content_length = reply->content_length;
949 if (content_length > 0) {
950 /* leave some room for a trailing '\0' (useful for simple parsing) */
951 content = av_malloc(content_length + 1);
952 ffurl_read_complete(rt->rtsp_hd, content, content_length);
953 content[content_length] = '\0';
954 }
955 if (content_ptr)
956 *content_ptr = content;
957 else
958 av_free(content);
959
960 if (rt->seq != reply->seq) {
961 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
962 rt->seq, reply->seq);
963 }
964
965 /* EOS */
966 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
967 reply->notice == 2104 /* Start-of-Stream Reached */ ||
968 reply->notice == 2306 /* Continuous Feed Terminated */) {
969 rt->state = RTSP_STATE_IDLE;
970 } else if (reply->notice >= 4400 && reply->notice < 5500) {
971 return AVERROR(EIO); /* data or server error */
972 } else if (reply->notice == 2401 /* Ticket Expired */ ||
973 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
974 return AVERROR(EPERM);
975
976 return 0;
977 }
978
979 /**
980 * Send a command to the RTSP server without waiting for the reply.
981 *
982 * @param s RTSP (de)muxer context
983 * @param method the method for the request
984 * @param url the target url for the request
985 * @param headers extra header lines to include in the request
986 * @param send_content if non-null, the data to send as request body content
987 * @param send_content_length the length of the send_content data, or 0 if
988 * send_content is null
989 *
990 * @return zero if success, nonzero otherwise
991 */
992 static int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
993 const char *method, const char *url,
994 const char *headers,
995 const unsigned char *send_content,
996 int send_content_length)
997 {
998 RTSPState *rt = s->priv_data;
999 char buf[4096], *out_buf;
1000 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1001
1002 /* Add in RTSP headers */
1003 out_buf = buf;
1004 rt->seq++;
1005 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
1006 if (headers)
1007 av_strlcat(buf, headers, sizeof(buf));
1008 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
1009 if (rt->session_id[0] != '\0' && (!headers ||
1010 !strstr(headers, "\nIf-Match:"))) {
1011 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
1012 }
1013 if (rt->auth[0]) {
1014 char *str = ff_http_auth_create_response(&rt->auth_state,
1015 rt->auth, url, method);
1016 if (str)
1017 av_strlcat(buf, str, sizeof(buf));
1018 av_free(str);
1019 }
1020 if (send_content_length > 0 && send_content)
1021 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
1022 av_strlcat(buf, "\r\n", sizeof(buf));
1023
1024 /* base64 encode rtsp if tunneling */
1025 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1026 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1027 out_buf = base64buf;
1028 }
1029
1030 av_dlog(s, "Sending:\n%s--\n", buf);
1031
1032 ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
1033 if (send_content_length > 0 && send_content) {
1034 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1035 av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
1036 "with content data not supported\n");
1037 return AVERROR_PATCHWELCOME;
1038 }
1039 ffurl_write(rt->rtsp_hd_out, send_content, send_content_length);
1040 }
1041 rt->last_cmd_time = av_gettime();
1042
1043 return 0;
1044 }
1045
1046 int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1047 const char *url, const char *headers)
1048 {
1049 return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1050 }
1051
1052 int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1053 const char *headers, RTSPMessageHeader *reply,
1054 unsigned char **content_ptr)
1055 {
1056 return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1057 content_ptr, NULL, 0);
1058 }
1059
1060 int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1061 const char *method, const char *url,
1062 const char *header,
1063 RTSPMessageHeader *reply,
1064 unsigned char **content_ptr,
1065 const unsigned char *send_content,
1066 int send_content_length)
1067 {
1068 RTSPState *rt = s->priv_data;
1069 HTTPAuthType cur_auth_type;
1070 int ret;
1071
1072 retry:
1073 cur_auth_type = rt->auth_state.auth_type;
1074 if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
1075 send_content,
1076 send_content_length)))
1077 return ret;
1078
1079 if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1080 return ret;
1081
1082 if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
1083 rt->auth_state.auth_type != HTTP_AUTH_NONE)
1084 goto retry;
1085
1086 if (reply->status_code > 400){
1087 av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1088 method,
1089 reply->status_code,
1090 reply->reason);
1091 av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1092 }
1093
1094 return 0;
1095 }
1096
1097 int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1098 int lower_transport, const char *real_challenge)
1099 {
1100 RTSPState *rt = s->priv_data;
1101 int rtx, j, i, err, interleave = 0;
1102 RTSPStream *rtsp_st;
1103 RTSPMessageHeader reply1, *reply = &reply1;
1104 char cmd[2048];
1105 const char *trans_pref;
1106
1107 if (rt->transport == RTSP_TRANSPORT_RDT)
1108 trans_pref = "x-pn-tng";
1109 else
1110 trans_pref = "RTP/AVP";
1111
1112 /* default timeout: 1 minute */
1113 rt->timeout = 60;
1114
1115 /* for each stream, make the setup request */
1116 /* XXX: we assume the same server is used for the control of each
1117 * RTSP stream */
1118
1119 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1120 char transport[2048];
1121
1122 /*
1123 * WMS serves all UDP data over a single connection, the RTX, which
1124 * isn't necessarily the first in the SDP but has to be the first
1125 * to be set up, else the second/third SETUP will fail with a 461.
1126 */
1127 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1128 rt->server_type == RTSP_SERVER_WMS) {
1129 if (i == 0) {
1130 /* rtx first */
1131 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1132 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1133 if (len >= 4 &&
1134 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1135 "/rtx"))
1136 break;
1137 }
1138 if (rtx == rt->nb_rtsp_streams)
1139 return -1; /* no RTX found */
1140 rtsp_st = rt->rtsp_streams[rtx];
1141 } else
1142 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1143 } else
1144 rtsp_st = rt->rtsp_streams[i];
1145
1146 /* RTP/UDP */
1147 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1148 char buf[256];
1149
1150 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1151 port = reply->transports[0].client_port_min;
1152 goto have_port;
1153 }
1154
1155 /* first try in specified port range */
1156 if (RTSP_RTP_PORT_MIN != 0) {
1157 while (j <= RTSP_RTP_PORT_MAX) {
1158 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1159 "?localport=%d", j);
1160 /* we will use two ports per rtp stream (rtp and rtcp) */
1161 j += 2;
1162 if (ffurl_open(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE,
1163 &s->interrupt_callback, NULL) == 0)
1164 goto rtp_opened;
1165 }
1166 }
1167
1168 av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1169 err = AVERROR(EIO);
1170 goto fail;
1171
1172 rtp_opened:
1173 port = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1174 have_port:
1175 snprintf(transport, sizeof(transport) - 1,
1176 "%s/UDP;", trans_pref);
1177 if (rt->server_type != RTSP_SERVER_REAL)
1178 av_strlcat(transport, "unicast;", sizeof(transport));
1179 av_strlcatf(transport, sizeof(transport),
1180 "client_port=%d", port);
1181 if (rt->transport == RTSP_TRANSPORT_RTP &&
1182 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1183 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1184 }
1185
1186 /* RTP/TCP */
1187 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1188 /* For WMS streams, the application streams are only used for
1189 * UDP. When trying to set it up for TCP streams, the server
1190 * will return an error. Therefore, we skip those streams. */
1191 if (rt->server_type == RTSP_SERVER_WMS &&
1192 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1193 AVMEDIA_TYPE_DATA)
1194 continue;
1195 snprintf(transport, sizeof(transport) - 1,
1196 "%s/TCP;", trans_pref);
1197 if (rt->transport != RTSP_TRANSPORT_RDT)
1198 av_strlcat(transport, "unicast;", sizeof(transport));
1199 av_strlcatf(transport, sizeof(transport),
1200 "interleaved=%d-%d",
1201 interleave, interleave + 1);
1202 interleave += 2;
1203 }
1204
1205 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1206 snprintf(transport, sizeof(transport) - 1,
1207 "%s/UDP;multicast", trans_pref);
1208 }
1209 if (s->oformat) {
1210 av_strlcat(transport, ";mode=receive", sizeof(transport));
1211 } else if (rt->server_type == RTSP_SERVER_REAL ||
1212 rt->server_type == RTSP_SERVER_WMS)
1213 av_strlcat(transport, ";mode=play", sizeof(transport));
1214 snprintf(cmd, sizeof(cmd),
1215 "Transport: %s\r\n",
1216 transport);
1217 if (rt->accept_dynamic_rate)
1218 av_strlcat(cmd, "x-Dynamic-Rate: 0\r\n", sizeof(cmd));
1219 if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1220 char real_res[41], real_csum[9];
1221 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1222 real_challenge);
1223 av_strlcatf(cmd, sizeof(cmd),
1224 "If-Match: %s\r\n"
1225 "RealChallenge2: %s, sd=%s\r\n",
1226 rt->session_id, real_res, real_csum);
1227 }
1228 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1229 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1230 err = 1;
1231 goto fail;
1232 } else if (reply->status_code != RTSP_STATUS_OK ||
1233 reply->nb_transports != 1) {
1234 err = AVERROR_INVALIDDATA;
1235 goto fail;
1236 }
1237
1238 /* XXX: same protocol for all streams is required */
1239 if (i > 0) {
1240 if (reply->transports[0].lower_transport != rt->lower_transport ||
1241 reply->transports[0].transport != rt->transport) {
1242 err = AVERROR_INVALIDDATA;
1243 goto fail;
1244 }
1245 } else {
1246 rt->lower_transport = reply->transports[0].lower_transport;
1247 rt->transport = reply->transports[0].transport;
1248 }
1249
1250 /* Fail if the server responded with another lower transport mode
1251 * than what we requested. */
1252 if (reply->transports[0].lower_transport != lower_transport) {
1253 av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1254 err = AVERROR_INVALIDDATA;
1255 goto fail;
1256 }
1257
1258 switch(reply->transports[0].lower_transport) {
1259 case RTSP_LOWER_TRANSPORT_TCP:
1260 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1261 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1262 break;
1263
1264 case RTSP_LOWER_TRANSPORT_UDP: {
1265 char url[1024], options[30] = "";
1266
1267 if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC)
1268 av_strlcpy(options, "?connect=1", sizeof(options));
1269 /* Use source address if specified */
1270 if (reply->transports[0].source[0]) {
1271 ff_url_join(url, sizeof(url), "rtp", NULL,
1272 reply->transports[0].source,
1273 reply->transports[0].server_port_min, "%s", options);
1274 } else {
1275 ff_url_join(url, sizeof(url), "rtp", NULL, host,
1276 reply->transports[0].server_port_min, "%s", options);
1277 }
1278 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1279 ff_rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1280 err = AVERROR_INVALIDDATA;
1281 goto fail;
1282 }
1283 /* Try to initialize the connection state in a
1284 * potential NAT router by sending dummy packets.
1285 * RTP/RTCP dummy packets are used for RDT, too.
1286 */
1287 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1288 CONFIG_RTPDEC)
1289 ff_rtp_send_punch_packets(rtsp_st->rtp_handle);
1290 break;
1291 }
1292 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1293 char url[1024], namebuf[50];
1294 struct sockaddr_storage addr;
1295 int port, ttl;
1296
1297 if (reply->transports[0].destination.ss_family) {
1298 addr = reply->transports[0].destination;
1299 port = reply->transports[0].port_min;
1300 ttl = reply->transports[0].ttl;
1301 } else {
1302 addr = rtsp_st->sdp_ip;
1303 port = rtsp_st->sdp_port;
1304 ttl = rtsp_st->sdp_ttl;
1305 }
1306 getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1307 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1308 ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1309 port, "?ttl=%d", ttl);
1310 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
1311 &s->interrupt_callback, NULL) < 0) {
1312 err = AVERROR_INVALIDDATA;
1313 goto fail;
1314 }
1315 break;
1316 }
1317 }
1318
1319 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1320 goto fail;
1321 }
1322
1323 if (reply->timeout > 0)
1324 rt->timeout = reply->timeout;
1325
1326 if (rt->server_type == RTSP_SERVER_REAL)
1327 rt->need_subscription = 1;
1328
1329 return 0;
1330
1331 fail:
1332 ff_rtsp_undo_setup(s);
1333 return err;
1334 }
1335
1336 void ff_rtsp_close_connections(AVFormatContext *s)
1337 {
1338 RTSPState *rt = s->priv_data;
1339 if (rt->rtsp_hd_out != rt->rtsp_hd) ffurl_close(rt->rtsp_hd_out);
1340 ffurl_close(rt->rtsp_hd);
1341 rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1342 }
1343
1344 int ff_rtsp_connect(AVFormatContext *s)
1345 {
1346 RTSPState *rt = s->priv_data;
1347 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1348 char *option_list, *option, *filename;
1349 int port, err, tcp_fd;
1350 RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1351 int lower_transport_mask = 0;
1352 char real_challenge[64] = "";
1353 struct sockaddr_storage peer;
1354 socklen_t peer_len = sizeof(peer);
1355
1356 if (!ff_network_init())
1357 return AVERROR(EIO);
1358
1359 rt->control_transport = RTSP_MODE_PLAIN;
1360 if (rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_HTTP)) {
1361 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1362 rt->control_transport = RTSP_MODE_TUNNEL;
1363 }
1364 /* Only pass through valid flags from here */
1365 rt->lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1366
1367 redirect:
1368 lower_transport_mask = rt->lower_transport_mask;
1369 /* extract hostname and port */
1370 av_url_split(NULL, 0, auth, sizeof(auth),
1371 host, sizeof(host), &port, path, sizeof(path), s->filename);
1372 if (*auth) {
1373 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1374 }
1375 if (port < 0)
1376 port = RTSP_DEFAULT_PORT;
1377
1378 #if FF_API_RTSP_URL_OPTIONS
1379 /* search for options */
1380 option_list = strrchr(path, '?');
1381 if (option_list) {
1382 /* Strip out the RTSP specific options, write out the rest of
1383 * the options back into the same string. */
1384 filename = option_list;
1385 while (option_list) {
1386 int handled = 1;
1387 /* move the option pointer */
1388 option = ++option_list;
1389 option_list = strchr(option_list, '&');
1390 if (option_list)
1391 *option_list = 0;
1392
1393 /* handle the options */
1394 if (!strcmp(option, "udp")) {
1395 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
1396 } else if (!strcmp(option, "multicast")) {
1397 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1398 } else if (!strcmp(option, "tcp")) {
1399 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1400 } else if(!strcmp(option, "http")) {
1401 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1402 rt->control_transport = RTSP_MODE_TUNNEL;
1403 } else if (!strcmp(option, "filter_src")) {
1404 rt->rtsp_flags |= RTSP_FLAG_FILTER_SRC;
1405 } else {
1406 /* Write options back into the buffer, using memmove instead
1407 * of strcpy since the strings may overlap. */
1408 int len = strlen(option);
1409 memmove(++filename, option, len);
1410 filename += len;
1411 if (option_list) *filename = '&';
1412 handled = 0;
1413 }
1414 if (handled)
1415 av_log(s, AV_LOG_WARNING, "Options passed via URL are "
1416 "deprecated, use -rtsp_transport "
1417 "and -rtsp_flags instead.\n");
1418 }
1419 *filename = 0;
1420 }
1421 #endif
1422
1423 if (!lower_transport_mask)
1424 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1425
1426 if (s->oformat) {
1427 /* Only UDP or TCP - UDP multicast isn't supported. */
1428 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1429 (1 << RTSP_LOWER_TRANSPORT_TCP);
1430 if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1431 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1432 "only UDP and TCP are supported for output.\n");
1433 err = AVERROR(EINVAL);
1434 goto fail;
1435 }
1436 }
1437
1438 /* Construct the URI used in request; this is similar to s->filename,
1439 * but with authentication credentials removed and RTSP specific options
1440 * stripped out. */
1441 ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1442 host, port, "%s", path);
1443
1444 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1445 /* set up initial handshake for tunneling */
1446 char httpname[1024];
1447 char sessioncookie[17];
1448 char headers[1024];
1449
1450 ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1451 snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1452 av_get_random_seed(), av_get_random_seed());
1453
1454 /* GET requests */
1455 if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ,
1456 &s->interrupt_callback) < 0) {
1457 err = AVERROR(EIO);
1458 goto fail;
1459 }
1460
1461 /* generate GET headers */
1462 snprintf(headers, sizeof(headers),
1463 "x-sessioncookie: %s\r\n"
1464 "Accept: application/x-rtsp-tunnelled\r\n"
1465 "Pragma: no-cache\r\n"
1466 "Cache-Control: no-cache\r\n",
1467 sessioncookie);
1468 av_opt_set(rt->rtsp_hd->priv_data, "headers", headers, 0);
1469
1470 /* complete the connection */
1471 if (ffurl_connect(rt->rtsp_hd, NULL)) {
1472 err = AVERROR(EIO);
1473 goto fail;
1474 }
1475
1476 /* POST requests */
1477 if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE,
1478 &s->interrupt_callback) < 0 ) {
1479 err = AVERROR(EIO);
1480 goto fail;
1481 }
1482
1483 /* generate POST headers */
1484 snprintf(headers, sizeof(headers),
1485 "x-sessioncookie: %s\r\n"
1486 "Content-Type: application/x-rtsp-tunnelled\r\n"
1487 "Pragma: no-cache\r\n"
1488 "Cache-Control: no-cache\r\n"
1489 "Content-Length: 32767\r\n"
1490 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1491 sessioncookie);
1492 av_opt_set(rt->rtsp_hd_out->priv_data, "headers", headers, 0);
1493 av_opt_set(rt->rtsp_hd_out->priv_data, "chunked_post", "0", 0);
1494
1495 /* Initialize the authentication state for the POST session. The HTTP
1496 * protocol implementation doesn't properly handle multi-pass
1497 * authentication for POST requests, since it would require one of
1498 * the following:
1499 * - implementing Expect: 100-continue, which many HTTP servers
1500 * don't support anyway, even less the RTSP servers that do HTTP
1501 * tunneling
1502 * - sending the whole POST data until getting a 401 reply specifying
1503 * what authentication method to use, then resending all that data
1504 * - waiting for potential 401 replies directly after sending the
1505 * POST header (waiting for some unspecified time)
1506 * Therefore, we copy the full auth state, which works for both basic
1507 * and digest. (For digest, we would have to synchronize the nonce
1508 * count variable between the two sessions, if we'd do more requests
1509 * with the original session, though.)
1510 */
1511 ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1512
1513 /* complete the connection */
1514 if (ffurl_connect(rt->rtsp_hd_out, NULL)) {
1515 err = AVERROR(EIO);
1516 goto fail;
1517 }
1518 } else {
1519 /* open the tcp connection */
1520 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1521 if (ffurl_open(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
1522 &s->interrupt_callback, NULL) < 0) {
1523 err = AVERROR(EIO);
1524 goto fail;
1525 }
1526 rt->rtsp_hd_out = rt->rtsp_hd;
1527 }
1528 rt->seq = 0;
1529
1530 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1531 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1532 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1533 NULL, 0, NI_NUMERICHOST);
1534 }
1535
1536 /* request options supported by the server; this also detects server
1537 * type */
1538 for (rt->server_type = RTSP_SERVER_RTP;;) {
1539 cmd[0] = 0;
1540 if (rt->server_type == RTSP_SERVER_REAL)
1541 av_strlcat(cmd,
1542 /*
1543 * The following entries are required for proper
1544 * streaming from a Realmedia server. They are
1545 * interdependent in some way although we currently
1546 * don't quite understand how. Values were copied
1547 * from mplayer SVN r23589.
1548 * ClientChallenge is a 16-byte ID in hex
1549 * CompanyID is a 16-byte ID in base64
1550 */
1551 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1552 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1553 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1554 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1555 sizeof(cmd));
1556 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1557 if (reply->status_code != RTSP_STATUS_OK) {
1558 err = AVERROR_INVALIDDATA;
1559 goto fail;
1560 }
1561
1562 /* detect server type if not standard-compliant RTP */
1563 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1564 rt->server_type = RTSP_SERVER_REAL;
1565 continue;
1566 } else if (!av_strncasecmp(reply->server, "WMServer/", 9)) {
1567 rt->server_type = RTSP_SERVER_WMS;
1568 } else if (rt->server_type == RTSP_SERVER_REAL)
1569 strcpy(real_challenge, reply->real_challenge);
1570 break;
1571 }
1572
1573 if (s->iformat && CONFIG_RTSP_DEMUXER)
1574 err = ff_rtsp_setup_input_streams(s, reply);
1575 else if (CONFIG_RTSP_MUXER)
1576 err = ff_rtsp_setup_output_streams(s, host);
1577 if (err)
1578 goto fail;
1579
1580 do {
1581 int lower_transport = ff_log2_tab[lower_transport_mask &
1582 ~(lower_transport_mask - 1)];
1583
1584 err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1585 rt->server_type == RTSP_SERVER_REAL ?
1586 real_challenge : NULL);
1587 if (err < 0)
1588 goto fail;
1589 lower_transport_mask &= ~(1 << lower_transport);
1590 if (lower_transport_mask == 0 && err == 1) {
1591 err = AVERROR(EPROTONOSUPPORT);
1592 goto fail;
1593 }
1594 } while (err);
1595
1596 rt->lower_transport_mask = lower_transport_mask;
1597 av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1598 rt->state = RTSP_STATE_IDLE;
1599 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1600 return 0;
1601 fail:
1602 ff_rtsp_close_streams(s);
1603 ff_rtsp_close_connections(s);
1604 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1605 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1606 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1607 reply->status_code,
1608 s->filename);
1609 goto redirect;
1610 }
1611 ff_network_close();
1612 return err;
1613 }
1614 #endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1615
1616 #if CONFIG_RTPDEC
1617 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1618 uint8_t *buf, int buf_size, int64_t wait_end)
1619 {
1620 RTSPState *rt = s->priv_data;
1621 RTSPStream *rtsp_st;
1622 int n, i, ret, tcp_fd, timeout_cnt = 0;
1623 int max_p = 0;
1624 struct pollfd *p = rt->p;
1625
1626 for (;;) {
1627 if (ff_check_interrupt(&s->interrupt_callback))
1628 return AVERROR_EXIT;
1629 if (wait_end && wait_end - av_gettime() < 0)
1630 return AVERROR(EAGAIN);
1631 max_p = 0;
1632 if (rt->rtsp_hd) {
1633 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1634 p[max_p].fd = tcp_fd;
1635 p[max_p++].events = POLLIN;
1636 } else {
1637 tcp_fd = -1;
1638 }
1639 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1640 rtsp_st = rt->rtsp_streams[i];
1641 if (rtsp_st->rtp_handle) {
1642 p[max_p].fd = ffurl_get_file_handle(rtsp_st->rtp_handle);
1643 p[max_p++].events = POLLIN;
1644 p[max_p].fd = ff_rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1645 p[max_p++].events = POLLIN;
1646 }
1647 }
1648 n = poll(p, max_p, POLL_TIMEOUT_MS);
1649 if (n > 0) {
1650 int j = 1 - (tcp_fd == -1);
1651 timeout_cnt = 0;
1652 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1653 rtsp_st = rt->rtsp_streams[i];
1654 if (rtsp_st->rtp_handle) {
1655 if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
1656 ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size);
1657 if (ret > 0) {
1658 *prtsp_st = rtsp_st;
1659 return ret;
1660 }
1661 }
1662 j+=2;
1663 }
1664 }
1665 #if CONFIG_RTSP_DEMUXER
1666 if (tcp_fd != -1 && p[0].revents & POLLIN) {
1667 RTSPMessageHeader reply;
1668
1669 ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1670 if (ret < 0)
1671 return ret;
1672 /* XXX: parse message */
1673 if (rt->state != RTSP_STATE_STREAMING)
1674 return 0;
1675 }
1676 #endif
1677 } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1678 return AVERROR(ETIMEDOUT);
1679 } else if (n < 0 && errno != EINTR)
1680 return AVERROR(errno);
1681 }
1682 }
1683
1684 int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1685 {
1686 RTSPState *rt = s->priv_data;
1687 int ret, len;
1688 RTSPStream *rtsp_st, *first_queue_st = NULL;
1689 int64_t wait_end = 0;
1690
1691 if (rt->nb_byes == rt->nb_rtsp_streams)
1692 return AVERROR_EOF;
1693
1694 /* get next frames from the same RTP packet */
1695 if (rt->cur_transport_priv) {
1696 if (rt->transport == RTSP_TRANSPORT_RDT) {
1697 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1698 } else
1699 ret = ff_rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1700 if (ret == 0) {
1701 rt->cur_transport_priv = NULL;
1702 return 0;
1703 } else if (ret == 1) {
1704 return 0;
1705 } else
1706 rt->cur_transport_priv = NULL;
1707 }
1708
1709 if (rt->transport == RTSP_TRANSPORT_RTP) {
1710 int i;
1711 int64_t first_queue_time = 0;
1712 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1713 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1714 int64_t queue_time;
1715 if (!rtpctx)
1716 continue;
1717 queue_time = ff_rtp_queued_packet_time(rtpctx);
1718 if (queue_time && (queue_time - first_queue_time < 0 ||
1719 !first_queue_time)) {
1720 first_queue_time = queue_time;
1721 first_queue_st = rt->rtsp_streams[i];
1722 }
1723 }
1724 if (first_queue_time)
1725 wait_end = first_queue_time + s->max_delay;
1726 }
1727
1728 /* read next RTP packet */
1729 redo:
1730 if (!rt->recvbuf) {
1731 rt->recvbuf = av_malloc(RECVBUF_SIZE);
1732 if (!rt->recvbuf)
1733 return AVERROR(ENOMEM);
1734 }
1735
1736 switch(rt->lower_transport) {
1737 default:
1738 #if CONFIG_RTSP_DEMUXER
1739 case RTSP_LOWER_TRANSPORT_TCP:
1740 len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
1741 break;
1742 #endif
1743 case RTSP_LOWER_TRANSPORT_UDP:
1744 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1745 len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
1746 if (len > 0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1747 ff_rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1748 break;
1749 }
1750 if (len == AVERROR(EAGAIN) && first_queue_st &&
1751 rt->transport == RTSP_TRANSPORT_RTP) {
1752 rtsp_st = first_queue_st;
1753 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
1754 goto end;
1755 }
1756 if (len < 0)
1757 return len;
1758 if (len == 0)
1759 return AVERROR_EOF;
1760 if (rt->transport == RTSP_TRANSPORT_RDT) {
1761 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1762 } else {
1763 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1764 if (ret < 0) {
1765 /* Either bad packet, or a RTCP packet. Check if the
1766 * first_rtcp_ntp_time field was initialized. */
1767 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1768 if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1769 /* first_rtcp_ntp_time has been initialized for this stream,
1770 * copy the same value to all other uninitialized streams,
1771 * in order to map their timestamp origin to the same ntp time
1772 * as this one. */
1773 int i;
1774 AVStream *st = NULL;
1775 if (rtsp_st->stream_index >= 0)
1776 st = s->streams[rtsp_st->stream_index];
1777 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1778 RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
1779 AVStream *st2 = NULL;
1780 if (rt->rtsp_streams[i]->stream_index >= 0)
1781 st2 = s->streams[rt->rtsp_streams[i]->stream_index];
1782 if (rtpctx2 && st && st2 &&
1783 rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
1784 rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1785 rtpctx2->rtcp_ts_offset = av_rescale_q(
1786 rtpctx->rtcp_ts_offset, st->time_base,
1787 st2->time_base);
1788 }
1789 }
1790 }
1791 if (ret == -RTCP_BYE) {
1792 rt->nb_byes++;
1793
1794 av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1795 rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1796
1797 if (rt->nb_byes == rt->nb_rtsp_streams)
1798 return AVERROR_EOF;
1799 }
1800 }
1801 }
1802 end:
1803 if (ret < 0)
1804 goto redo;
1805 if (ret == 1)
1806 /* more packets may follow, so we save the RTP context */
1807 rt->cur_transport_priv = rtsp_st->transport_priv;
1808
1809 return ret;
1810 }
1811 #endif /* CONFIG_RTPDEC */
1812
1813 #if CONFIG_SDP_DEMUXER
1814 static int sdp_probe(AVProbeData *p1)
1815 {
1816 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1817
1818 /* we look for a line beginning "c=IN IP" */
1819 while (p < p_end && *p != '\0') {
1820 if (p + sizeof("c=IN IP") - 1 < p_end &&
1821 av_strstart(p, "c=IN IP", NULL))
1822 return AVPROBE_SCORE_MAX / 2;
1823
1824 while (p < p_end - 1 && *p != '\n') p++;
1825 if (++p >= p_end)
1826 break;
1827 if (*p == '\r')
1828 p++;
1829 }
1830 return 0;
1831 }
1832
1833 static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1834 {
1835 RTSPState *rt = s->priv_data;
1836 RTSPStream *rtsp_st;
1837 int size, i, err;
1838 char *content;
1839 char url[1024];
1840
1841 if (!ff_network_init())
1842 return AVERROR(EIO);
1843
1844 /* read the whole sdp file */
1845 /* XXX: better loading */
1846 content = av_malloc(SDP_MAX_SIZE);
1847 size = avio_read(s->pb, content, SDP_MAX_SIZE - 1);
1848 if (size <= 0) {
1849 av_free(content);
1850 return AVERROR_INVALIDDATA;
1851 }
1852 content[size] ='\0';
1853
1854 err = ff_sdp_parse(s, content);
1855 av_free(content);
1856 if (err) goto fail;
1857
1858 /* open each RTP stream */
1859 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1860 char namebuf[50];
1861 rtsp_st = rt->rtsp_streams[i];
1862
1863 getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
1864 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1865 ff_url_join(url, sizeof(url), "rtp", NULL,
1866 namebuf, rtsp_st->sdp_port,
1867 "?localport=%d&ttl=%d&connect=%d", rtsp_st->sdp_port,
1868 rtsp_st->sdp_ttl,
1869 rt->rtsp_flags & RTSP_FLAG_FILTER_SRC ? 1 : 0);
1870 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
1871 &s->interrupt_callback, NULL) < 0) {
1872 err = AVERROR_INVALIDDATA;
1873 goto fail;
1874 }
1875 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1876 goto fail;
1877 }
1878 return 0;
1879 fail:
1880 ff_rtsp_close_streams(s);
1881 ff_network_close();
1882 return err;
1883 }
1884
1885 static int sdp_read_close(AVFormatContext *s)
1886 {
1887 ff_rtsp_close_streams(s);
1888 ff_network_close();
1889 return 0;
1890 }
1891
1892 static const AVClass sdp_demuxer_class = {
1893 .class_name = "SDP demuxer",
1894 .item_name = av_default_item_name,
1895 .option = sdp_options,
1896 .version = LIBAVUTIL_VERSION_INT,
1897 };
1898
1899 AVInputFormat ff_sdp_demuxer = {
1900 .name = "sdp",
1901 .long_name = NULL_IF_CONFIG_SMALL("SDP"),
1902 .priv_data_size = sizeof(RTSPState),
1903 .read_probe = sdp_probe,
1904 .read_header = sdp_read_header,
1905 .read_packet = ff_rtsp_fetch_packet,
1906 .read_close = sdp_read_close,
1907 .priv_class = &sdp_demuxer_class
1908 };
1909 #endif /* CONFIG_SDP_DEMUXER */
1910
1911 #if CONFIG_RTP_DEMUXER
1912 static int rtp_probe(AVProbeData *p)
1913 {
1914 if (av_strstart(p->filename, "rtp:", NULL))
1915 return AVPROBE_SCORE_MAX;
1916 return 0;
1917 }
1918
1919 static int rtp_read_header(AVFormatContext *s,
1920 AVFormatParameters *ap)
1921 {
1922 uint8_t recvbuf[1500];
1923 char host[500], sdp[500];
1924 int ret, port;
1925 URLContext* in = NULL;
1926 int payload_type;
1927 AVCodecContext codec;
1928 struct sockaddr_storage addr;
1929 AVIOContext pb;
1930 socklen_t addrlen = sizeof(addr);
1931
1932 if (!ff_network_init())
1933 return AVERROR(EIO);
1934
1935 ret = ffurl_open(&in, s->filename, AVIO_FLAG_READ,
1936 &s->interrupt_callback, NULL);
1937 if (ret)
1938 goto fail;
1939
1940 while (1) {
1941 ret = ffurl_read(in, recvbuf, sizeof(recvbuf));
1942 if (ret == AVERROR(EAGAIN))
1943 continue;
1944 if (ret < 0)
1945 goto fail;
1946 if (ret < 12) {
1947 av_log(s, AV_LOG_WARNING, "Received too short packet\n");
1948 continue;
1949 }
1950
1951 if ((recvbuf[0] & 0xc0) != 0x80) {
1952 av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
1953 "received\n");
1954 continue;
1955 }
1956
1957 payload_type = recvbuf[1] & 0x7f;
1958 break;
1959 }
1960 getsockname(ffurl_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
1961 ffurl_close(in);
1962 in = NULL;
1963
1964 memset(&codec, 0, sizeof(codec));
1965 if (ff_rtp_get_codec_info(&codec, payload_type)) {
1966 av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
1967 "without an SDP file describing it\n",
1968 payload_type);
1969 goto fail;
1970 }
1971 if (codec.codec_type != AVMEDIA_TYPE_DATA) {
1972 av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
1973 "properly you need an SDP file "
1974 "describing it\n");
1975 }
1976
1977 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
1978 NULL, 0, s->filename);
1979
1980 snprintf(sdp, sizeof(sdp),
1981 "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
1982 addr.ss_family == AF_INET ? 4 : 6, host,
1983 codec.codec_type == AVMEDIA_TYPE_DATA ? "application" :
1984 codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
1985 port, payload_type);
1986 av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
1987
1988 ffio_init_context(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
1989 s->pb = &pb;
1990
1991 /* sdp_read_header initializes this again */
1992 ff_network_close();
1993
1994 ret = sdp_read_header(s, ap);
1995 s->pb = NULL;
1996 return ret;
1997
1998 fail:
1999 if (in)
2000 ffurl_close(in);
2001 ff_network_close();
2002 return ret;
2003 }
2004
2005 static const AVClass rtp_demuxer_class = {
2006 .class_name = "RTP demuxer",
2007 .item_name = av_default_item_name,
2008 .option = rtp_options,
2009 .version = LIBAVUTIL_VERSION_INT,
2010 };
2011
2012 AVInputFormat ff_rtp_demuxer = {
2013 .name = "rtp",
2014 .long_name = NULL_IF_CONFIG_SMALL("RTP input format"),
2015 .priv_data_size = sizeof(RTSPState),
2016 .read_probe = rtp_probe,
2017 .read_header = rtp_read_header,
2018 .read_packet = ff_rtsp_fetch_packet,
2019 .read_close = sdp_read_close,
2020 .flags = AVFMT_NOFILE,
2021 .priv_class = &rtp_demuxer_class
2022 };
2023 #endif /* CONFIG_RTP_DEMUXER */
2024