35c965c0a1a5eed98063622db68d9407f67eecbc
[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 /* needed by inet_aton() */
23 #define _SVID_SOURCE
24
25 #include "libavutil/base64.h"
26 #include "libavutil/avstring.h"
27 #include "libavutil/intreadwrite.h"
28 #include "avformat.h"
29
30 #include <sys/time.h>
31 #if HAVE_SYS_SELECT_H
32 #include <sys/select.h>
33 #endif
34 #include <strings.h>
35 #include "network.h"
36 #include "rtsp.h"
37
38 #include "rtpdec.h"
39 #include "rdt.h"
40 #include "rtp_asf.h"
41 #include "rtp_vorbis.h"
42
43 //#define DEBUG
44 //#define DEBUG_RTP_TCP
45
46 #if LIBAVFORMAT_VERSION_INT < (53 << 16)
47 int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
48 #endif
49
50 #define SPACE_CHARS " \t\r\n"
51 /* we use memchr() instead of strchr() here because strchr() will return
52 * the terminating '\0' of SPACE_CHARS instead of NULL if c is '\0'. */
53 #define redir_isspace(c) memchr(SPACE_CHARS, c, 4)
54 static void skip_spaces(const char **pp)
55 {
56 const char *p;
57 p = *pp;
58 while (redir_isspace(*p))
59 p++;
60 *pp = p;
61 }
62
63 static void get_word_until_chars(char *buf, int buf_size,
64 const char *sep, const char **pp)
65 {
66 const char *p;
67 char *q;
68
69 p = *pp;
70 skip_spaces(&p);
71 q = buf;
72 while (!strchr(sep, *p) && *p != '\0') {
73 if ((q - buf) < buf_size - 1)
74 *q++ = *p;
75 p++;
76 }
77 if (buf_size > 0)
78 *q = '\0';
79 *pp = p;
80 }
81
82 static void get_word_sep(char *buf, int buf_size, const char *sep,
83 const char **pp)
84 {
85 if (**pp == '/') (*pp)++;
86 get_word_until_chars(buf, buf_size, sep, pp);
87 }
88
89 static void get_word(char *buf, int buf_size, const char **pp)
90 {
91 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
92 }
93
94 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
95 static int sdp_parse_rtpmap(AVFormatContext *s,
96 AVCodecContext *codec, RTSPStream *rtsp_st,
97 int payload_type, const char *p)
98 {
99 char buf[256];
100 int i;
101 AVCodec *c;
102 const char *c_name;
103
104 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
105 * see if we can handle this kind of payload.
106 * The space should normally not be there but some Real streams or
107 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
108 * have a trailing space. */
109 get_word_sep(buf, sizeof(buf), "/ ", &p);
110 if (payload_type >= RTP_PT_PRIVATE) {
111 RTPDynamicProtocolHandler *handler;
112 for (handler = RTPFirstDynamicPayloadHandler;
113 handler; handler = handler->next) {
114 if (!strcasecmp(buf, handler->enc_name) &&
115 codec->codec_type == handler->codec_type) {
116 codec->codec_id = handler->codec_id;
117 rtsp_st->dynamic_handler = handler;
118 if (handler->open)
119 rtsp_st->dynamic_protocol_context = handler->open();
120 break;
121 }
122 }
123 } else {
124 /* We are in a standard case
125 * (from http://www.iana.org/assignments/rtp-parameters). */
126 /* search into AVRtpPayloadTypes[] */
127 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
128 }
129
130 c = avcodec_find_decoder(codec->codec_id);
131 if (c && c->name)
132 c_name = c->name;
133 else
134 c_name = "(null)";
135
136 get_word_sep(buf, sizeof(buf), "/", &p);
137 i = atoi(buf);
138 switch (codec->codec_type) {
139 case CODEC_TYPE_AUDIO:
140 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
141 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
142 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
143 if (i > 0) {
144 codec->sample_rate = i;
145 get_word_sep(buf, sizeof(buf), "/", &p);
146 i = atoi(buf);
147 if (i > 0)
148 codec->channels = i;
149 // TODO: there is a bug here; if it is a mono stream, and
150 // less than 22000Hz, faad upconverts to stereo and twice
151 // the frequency. No problem, but the sample rate is being
152 // set here by the sdp line. Patch on its way. (rdm)
153 }
154 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
155 codec->sample_rate);
156 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
157 codec->channels);
158 break;
159 case CODEC_TYPE_VIDEO:
160 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
161 break;
162 default:
163 break;
164 }
165 return 0;
166 }
167
168 /* return the length and optionally the data */
169 static int hex_to_data(uint8_t *data, const char *p)
170 {
171 int c, len, v;
172
173 len = 0;
174 v = 1;
175 for (;;) {
176 skip_spaces(&p);
177 if (*p == '\0')
178 break;
179 c = toupper((unsigned char) *p++);
180 if (c >= '0' && c <= '9')
181 c = c - '0';
182 else if (c >= 'A' && c <= 'F')
183 c = c - 'A' + 10;
184 else
185 break;
186 v = (v << 4) | c;
187 if (v & 0x100) {
188 if (data)
189 data[len] = v;
190 len++;
191 v = 1;
192 }
193 }
194 return len;
195 }
196
197 static void sdp_parse_fmtp_config(AVCodecContext * codec, void *ctx,
198 char *attr, char *value)
199 {
200 switch (codec->codec_id) {
201 case CODEC_ID_MPEG4:
202 case CODEC_ID_AAC:
203 if (!strcmp(attr, "config")) {
204 /* decode the hexa encoded parameter */
205 int len = hex_to_data(NULL, value);
206 if (codec->extradata)
207 av_free(codec->extradata);
208 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
209 if (!codec->extradata)
210 return;
211 codec->extradata_size = len;
212 hex_to_data(codec->extradata, value);
213 }
214 break;
215 case CODEC_ID_VORBIS:
216 ff_vorbis_parse_fmtp_config(codec, ctx, attr, value);
217 break;
218 default:
219 break;
220 }
221 return;
222 }
223
224 typedef struct {
225 const char *str;
226 uint16_t type;
227 uint32_t offset;
228 } AttrNameMap;
229
230 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
231 #define ATTR_NAME_TYPE_INT 0
232 #define ATTR_NAME_TYPE_STR 1
233 static const AttrNameMap attr_names[]=
234 {
235 { "SizeLength", ATTR_NAME_TYPE_INT,
236 offsetof(RTPPayloadData, sizelength) },
237 { "IndexLength", ATTR_NAME_TYPE_INT,
238 offsetof(RTPPayloadData, indexlength) },
239 { "IndexDeltaLength", ATTR_NAME_TYPE_INT,
240 offsetof(RTPPayloadData, indexdeltalength) },
241 { "profile-level-id", ATTR_NAME_TYPE_INT,
242 offsetof(RTPPayloadData, profile_level_id) },
243 { "StreamType", ATTR_NAME_TYPE_INT,
244 offsetof(RTPPayloadData, streamtype) },
245 { "mode", ATTR_NAME_TYPE_STR,
246 offsetof(RTPPayloadData, mode) },
247 { NULL, -1, -1 },
248 };
249
250 /* parse the attribute line from the fmtp a line of an sdp resonse. This
251 * is broken out as a function because it is used in rtp_h264.c, which is
252 * forthcoming. */
253 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
254 char *value, int value_size)
255 {
256 skip_spaces(p);
257 if (**p) {
258 get_word_sep(attr, attr_size, "=", p);
259 if (**p == '=')
260 (*p)++;
261 get_word_sep(value, value_size, ";", p);
262 if (**p == ';')
263 (*p)++;
264 return 1;
265 }
266 return 0;
267 }
268
269 /* parse a SDP line and save stream attributes */
270 static void sdp_parse_fmtp(AVStream *st, const char *p)
271 {
272 char attr[256];
273 /* Vorbis setup headers can be up to 12KB and are sent base64
274 * encoded, giving a 12KB * (4/3) = 16KB FMTP line. */
275 char value[16384];
276 int i;
277 RTSPStream *rtsp_st = st->priv_data;
278 AVCodecContext *codec = st->codec;
279 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
280
281 /* loop on each attribute */
282 while (rtsp_next_attr_and_value(&p, attr, sizeof(attr),
283 value, sizeof(value))) {
284 /* grab the codec extra_data from the config parameter of the fmtp
285 * line */
286 sdp_parse_fmtp_config(codec, rtsp_st->dynamic_protocol_context,
287 attr, value);
288 /* Looking for a known attribute */
289 for (i = 0; attr_names[i].str; ++i) {
290 if (!strcasecmp(attr, attr_names[i].str)) {
291 if (attr_names[i].type == ATTR_NAME_TYPE_INT) {
292 *(int *)((char *)rtp_payload_data +
293 attr_names[i].offset) = atoi(value);
294 } else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
295 *(char **)((char *)rtp_payload_data +
296 attr_names[i].offset) = av_strdup(value);
297 }
298 }
299 }
300 }
301
302 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
303 * and end time.
304 * Used for seeking in the rtp stream.
305 */
306 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
307 {
308 char buf[256];
309
310 skip_spaces(&p);
311 if (!av_stristart(p, "npt=", &p))
312 return;
313
314 *start = AV_NOPTS_VALUE;
315 *end = AV_NOPTS_VALUE;
316
317 get_word_sep(buf, sizeof(buf), "-", &p);
318 *start = parse_date(buf, 1);
319 if (*p == '-') {
320 p++;
321 get_word_sep(buf, sizeof(buf), "-", &p);
322 *end = parse_date(buf, 1);
323 }
324 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
325 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
326 }
327
328 typedef struct SDPParseState {
329 /* SDP only */
330 struct in_addr default_ip;
331 int default_ttl;
332 int skip_media; ///< set if an unknown m= line occurs
333 } SDPParseState;
334
335 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
336 int letter, const char *buf)
337 {
338 RTSPState *rt = s->priv_data;
339 char buf1[64], st_type[64];
340 const char *p;
341 enum CodecType codec_type;
342 int payload_type, i;
343 AVStream *st;
344 RTSPStream *rtsp_st;
345 struct in_addr sdp_ip;
346 int ttl;
347
348 dprintf(s, "sdp: %c='%s'\n", letter, buf);
349
350 p = buf;
351 if (s1->skip_media && letter != 'm')
352 return;
353 switch (letter) {
354 case 'c':
355 get_word(buf1, sizeof(buf1), &p);
356 if (strcmp(buf1, "IN") != 0)
357 return;
358 get_word(buf1, sizeof(buf1), &p);
359 if (strcmp(buf1, "IP4") != 0)
360 return;
361 get_word_sep(buf1, sizeof(buf1), "/", &p);
362 if (inet_aton(buf1, &sdp_ip) == 0)
363 return;
364 ttl = 16;
365 if (*p == '/') {
366 p++;
367 get_word_sep(buf1, sizeof(buf1), "/", &p);
368 ttl = atoi(buf1);
369 }
370 if (s->nb_streams == 0) {
371 s1->default_ip = sdp_ip;
372 s1->default_ttl = ttl;
373 } else {
374 st = s->streams[s->nb_streams - 1];
375 rtsp_st = st->priv_data;
376 rtsp_st->sdp_ip = sdp_ip;
377 rtsp_st->sdp_ttl = ttl;
378 }
379 break;
380 case 's':
381 av_metadata_set(&s->metadata, "title", p);
382 break;
383 case 'i':
384 if (s->nb_streams == 0) {
385 av_metadata_set(&s->metadata, "comment", p);
386 break;
387 }
388 break;
389 case 'm':
390 /* new stream */
391 s1->skip_media = 0;
392 get_word(st_type, sizeof(st_type), &p);
393 if (!strcmp(st_type, "audio")) {
394 codec_type = CODEC_TYPE_AUDIO;
395 } else if (!strcmp(st_type, "video")) {
396 codec_type = CODEC_TYPE_VIDEO;
397 } else if (!strcmp(st_type, "application")) {
398 codec_type = CODEC_TYPE_DATA;
399 } else {
400 s1->skip_media = 1;
401 return;
402 }
403 rtsp_st = av_mallocz(sizeof(RTSPStream));
404 if (!rtsp_st)
405 return;
406 rtsp_st->stream_index = -1;
407 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
408
409 rtsp_st->sdp_ip = s1->default_ip;
410 rtsp_st->sdp_ttl = s1->default_ttl;
411
412 get_word(buf1, sizeof(buf1), &p); /* port */
413 rtsp_st->sdp_port = atoi(buf1);
414
415 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
416
417 /* XXX: handle list of formats */
418 get_word(buf1, sizeof(buf1), &p); /* format list */
419 rtsp_st->sdp_payload_type = atoi(buf1);
420
421 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
422 /* no corresponding stream */
423 } else {
424 st = av_new_stream(s, 0);
425 if (!st)
426 return;
427 st->priv_data = rtsp_st;
428 rtsp_st->stream_index = st->index;
429 st->codec->codec_type = codec_type;
430 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
431 /* if standard payload type, we can find the codec right now */
432 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
433 }
434 }
435 /* put a default control url */
436 av_strlcpy(rtsp_st->control_url, rt->control_uri,
437 sizeof(rtsp_st->control_url));
438 break;
439 case 'a':
440 if (av_strstart(p, "control:", &p)) {
441 if (s->nb_streams == 0) {
442 if (!strncmp(p, "rtsp://", 7))
443 av_strlcpy(rt->control_uri, p,
444 sizeof(rt->control_uri));
445 } else {
446 char proto[32];
447 /* get the control url */
448 st = s->streams[s->nb_streams - 1];
449 rtsp_st = st->priv_data;
450
451 /* XXX: may need to add full url resolution */
452 url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
453 NULL, NULL, 0, p);
454 if (proto[0] == '\0') {
455 /* relative control URL */
456 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
457 av_strlcat(rtsp_st->control_url, "/",
458 sizeof(rtsp_st->control_url));
459 av_strlcat(rtsp_st->control_url, p,
460 sizeof(rtsp_st->control_url));
461 } else
462 av_strlcpy(rtsp_st->control_url, p,
463 sizeof(rtsp_st->control_url));
464 }
465 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
466 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
467 get_word(buf1, sizeof(buf1), &p);
468 payload_type = atoi(buf1);
469 st = s->streams[s->nb_streams - 1];
470 rtsp_st = st->priv_data;
471 sdp_parse_rtpmap(s, st->codec, rtsp_st, payload_type, p);
472 } else if (av_strstart(p, "fmtp:", &p)) {
473 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
474 get_word(buf1, sizeof(buf1), &p);
475 payload_type = atoi(buf1);
476 for (i = 0; i < s->nb_streams; i++) {
477 st = s->streams[i];
478 rtsp_st = st->priv_data;
479 if (rtsp_st->sdp_payload_type == payload_type) {
480 if (!(rtsp_st->dynamic_handler &&
481 rtsp_st->dynamic_handler->parse_sdp_a_line &&
482 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
483 i, rtsp_st->dynamic_protocol_context, buf)))
484 sdp_parse_fmtp(st, p);
485 }
486 }
487 } else if (av_strstart(p, "framesize:", &p)) {
488 // let dynamic protocol handlers have a stab at the line.
489 get_word(buf1, sizeof(buf1), &p);
490 payload_type = atoi(buf1);
491 for (i = 0; i < s->nb_streams; i++) {
492 st = s->streams[i];
493 rtsp_st = st->priv_data;
494 if (rtsp_st->sdp_payload_type == payload_type &&
495 rtsp_st->dynamic_handler &&
496 rtsp_st->dynamic_handler->parse_sdp_a_line)
497 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
498 rtsp_st->dynamic_protocol_context, buf);
499 }
500 } else if (av_strstart(p, "range:", &p)) {
501 int64_t start, end;
502
503 // this is so that seeking on a streamed file can work.
504 rtsp_parse_range_npt(p, &start, &end);
505 s->start_time = start;
506 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
507 s->duration = (end == AV_NOPTS_VALUE) ?
508 AV_NOPTS_VALUE : end - start;
509 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
510 if (atoi(p) == 1)
511 rt->transport = RTSP_TRANSPORT_RDT;
512 } else {
513 if (rt->server_type == RTSP_SERVER_WMS)
514 ff_wms_parse_sdp_a_line(s, p);
515 if (s->nb_streams > 0) {
516 if (rt->server_type == RTSP_SERVER_REAL)
517 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
518
519 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
520 if (rtsp_st->dynamic_handler &&
521 rtsp_st->dynamic_handler->parse_sdp_a_line)
522 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
523 s->nb_streams - 1,
524 rtsp_st->dynamic_protocol_context, buf);
525 }
526 }
527 break;
528 }
529 }
530
531 static int sdp_parse(AVFormatContext *s, const char *content)
532 {
533 const char *p;
534 int letter;
535 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
536 * contain long SDP lines containing complete ASF Headers (several
537 * kB) or arrays of MDPR (RM stream descriptor) headers plus
538 * "rulebooks" describing their properties. Therefore, the SDP line
539 * buffer is large.
540 *
541 * The Vorbis FMTP line can be up to 16KB - see sdp_parse_fmtp. */
542 char buf[16384], *q;
543 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
544
545 memset(s1, 0, sizeof(SDPParseState));
546 p = content;
547 for (;;) {
548 skip_spaces(&p);
549 letter = *p;
550 if (letter == '\0')
551 break;
552 p++;
553 if (*p != '=')
554 goto next_line;
555 p++;
556 /* get the content */
557 q = buf;
558 while (*p != '\n' && *p != '\r' && *p != '\0') {
559 if ((q - buf) < sizeof(buf) - 1)
560 *q++ = *p;
561 p++;
562 }
563 *q = '\0';
564 sdp_parse_line(s, s1, letter, buf);
565 next_line:
566 while (*p != '\n' && *p != '\0')
567 p++;
568 if (*p == '\n')
569 p++;
570 }
571 return 0;
572 }
573
574 /* close and free RTSP streams */
575 static void rtsp_close_streams(AVFormatContext *s)
576 {
577 RTSPState *rt = s->priv_data;
578 int i;
579 RTSPStream *rtsp_st;
580
581 for (i = 0; i < rt->nb_rtsp_streams; i++) {
582 rtsp_st = rt->rtsp_streams[i];
583 if (rtsp_st) {
584 if (rtsp_st->transport_priv) {
585 if (rt->transport == RTSP_TRANSPORT_RDT)
586 ff_rdt_parse_close(rtsp_st->transport_priv);
587 else
588 rtp_parse_close(rtsp_st->transport_priv);
589 }
590 if (rtsp_st->rtp_handle)
591 url_close(rtsp_st->rtp_handle);
592 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
593 rtsp_st->dynamic_handler->close(
594 rtsp_st->dynamic_protocol_context);
595 }
596 }
597 av_free(rt->rtsp_streams);
598 if (rt->asf_ctx) {
599 av_close_input_stream (rt->asf_ctx);
600 rt->asf_ctx = NULL;
601 }
602 av_freep(&rt->auth_b64);
603 }
604
605 static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
606 {
607 RTSPState *rt = s->priv_data;
608 AVStream *st = NULL;
609
610 /* open the RTP context */
611 if (rtsp_st->stream_index >= 0)
612 st = s->streams[rtsp_st->stream_index];
613 if (!st)
614 s->ctx_flags |= AVFMTCTX_NOHEADER;
615
616 if (rt->transport == RTSP_TRANSPORT_RDT)
617 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
618 rtsp_st->dynamic_protocol_context,
619 rtsp_st->dynamic_handler);
620 else
621 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
622 rtsp_st->sdp_payload_type,
623 &rtsp_st->rtp_payload_data);
624
625 if (!rtsp_st->transport_priv) {
626 return AVERROR(ENOMEM);
627 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
628 if (rtsp_st->dynamic_handler) {
629 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
630 rtsp_st->dynamic_protocol_context,
631 rtsp_st->dynamic_handler);
632 }
633 }
634
635 return 0;
636 }
637
638 #if CONFIG_RTSP_DEMUXER
639 static int rtsp_probe(AVProbeData *p)
640 {
641 if (av_strstart(p->filename, "rtsp:", NULL))
642 return AVPROBE_SCORE_MAX;
643 return 0;
644 }
645
646 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
647 {
648 const char *p;
649 int v;
650
651 p = *pp;
652 skip_spaces(&p);
653 v = strtol(p, (char **)&p, 10);
654 if (*p == '-') {
655 p++;
656 *min_ptr = v;
657 v = strtol(p, (char **)&p, 10);
658 *max_ptr = v;
659 } else {
660 *min_ptr = v;
661 *max_ptr = v;
662 }
663 *pp = p;
664 }
665
666 /* XXX: only one transport specification is parsed */
667 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
668 {
669 char transport_protocol[16];
670 char profile[16];
671 char lower_transport[16];
672 char parameter[16];
673 RTSPTransportField *th;
674 char buf[256];
675
676 reply->nb_transports = 0;
677
678 for (;;) {
679 skip_spaces(&p);
680 if (*p == '\0')
681 break;
682
683 th = &reply->transports[reply->nb_transports];
684
685 get_word_sep(transport_protocol, sizeof(transport_protocol),
686 "/", &p);
687 if (!strcasecmp (transport_protocol, "rtp")) {
688 get_word_sep(profile, sizeof(profile), "/;,", &p);
689 lower_transport[0] = '\0';
690 /* rtp/avp/<protocol> */
691 if (*p == '/') {
692 get_word_sep(lower_transport, sizeof(lower_transport),
693 ";,", &p);
694 }
695 th->transport = RTSP_TRANSPORT_RTP;
696 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
697 !strcasecmp (transport_protocol, "x-real-rdt")) {
698 /* x-pn-tng/<protocol> */
699 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
700 profile[0] = '\0';
701 th->transport = RTSP_TRANSPORT_RDT;
702 }
703 if (!strcasecmp(lower_transport, "TCP"))
704 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
705 else
706 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
707
708 if (*p == ';')
709 p++;
710 /* get each parameter */
711 while (*p != '\0' && *p != ',') {
712 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
713 if (!strcmp(parameter, "port")) {
714 if (*p == '=') {
715 p++;
716 rtsp_parse_range(&th->port_min, &th->port_max, &p);
717 }
718 } else if (!strcmp(parameter, "client_port")) {
719 if (*p == '=') {
720 p++;
721 rtsp_parse_range(&th->client_port_min,
722 &th->client_port_max, &p);
723 }
724 } else if (!strcmp(parameter, "server_port")) {
725 if (*p == '=') {
726 p++;
727 rtsp_parse_range(&th->server_port_min,
728 &th->server_port_max, &p);
729 }
730 } else if (!strcmp(parameter, "interleaved")) {
731 if (*p == '=') {
732 p++;
733 rtsp_parse_range(&th->interleaved_min,
734 &th->interleaved_max, &p);
735 }
736 } else if (!strcmp(parameter, "multicast")) {
737 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
738 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
739 } else if (!strcmp(parameter, "ttl")) {
740 if (*p == '=') {
741 p++;
742 th->ttl = strtol(p, (char **)&p, 10);
743 }
744 } else if (!strcmp(parameter, "destination")) {
745 struct in_addr ipaddr;
746
747 if (*p == '=') {
748 p++;
749 get_word_sep(buf, sizeof(buf), ";,", &p);
750 if (inet_aton(buf, &ipaddr))
751 th->destination = ntohl(ipaddr.s_addr);
752 }
753 }
754 while (*p != ';' && *p != '\0' && *p != ',')
755 p++;
756 if (*p == ';')
757 p++;
758 }
759 if (*p == ',')
760 p++;
761
762 reply->nb_transports++;
763 }
764 }
765
766 void rtsp_parse_line(RTSPMessageHeader *reply, const char *buf)
767 {
768 const char *p;
769
770 /* NOTE: we do case independent match for broken servers */
771 p = buf;
772 if (av_stristart(p, "Session:", &p)) {
773 int t;
774 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
775 if (av_stristart(p, ";timeout=", &p) &&
776 (t = strtol(p, NULL, 10)) > 0) {
777 reply->timeout = t;
778 }
779 } else if (av_stristart(p, "Content-Length:", &p)) {
780 reply->content_length = strtol(p, NULL, 10);
781 } else if (av_stristart(p, "Transport:", &p)) {
782 rtsp_parse_transport(reply, p);
783 } else if (av_stristart(p, "CSeq:", &p)) {
784 reply->seq = strtol(p, NULL, 10);
785 } else if (av_stristart(p, "Range:", &p)) {
786 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
787 } else if (av_stristart(p, "RealChallenge1:", &p)) {
788 skip_spaces(&p);
789 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
790 } else if (av_stristart(p, "Server:", &p)) {
791 skip_spaces(&p);
792 av_strlcpy(reply->server, p, sizeof(reply->server));
793 } else if (av_stristart(p, "Notice:", &p) ||
794 av_stristart(p, "X-Notice:", &p)) {
795 reply->notice = strtol(p, NULL, 10);
796 } else if (av_stristart(p, "Location:", &p)) {
797 skip_spaces(&p);
798 av_strlcpy(reply->location, p , sizeof(reply->location));
799 }
800 }
801
802 /* skip a RTP/TCP interleaved packet */
803 static void rtsp_skip_packet(AVFormatContext *s)
804 {
805 RTSPState *rt = s->priv_data;
806 int ret, len, len1;
807 uint8_t buf[1024];
808
809 ret = url_read_complete(rt->rtsp_hd, buf, 3);
810 if (ret != 3)
811 return;
812 len = AV_RB16(buf + 1);
813
814 dprintf(s, "skipping RTP packet len=%d\n", len);
815
816 /* skip payload */
817 while (len > 0) {
818 len1 = len;
819 if (len1 > sizeof(buf))
820 len1 = sizeof(buf);
821 ret = url_read_complete(rt->rtsp_hd, buf, len1);
822 if (ret != len1)
823 return;
824 len -= len1;
825 }
826 }
827
828 /**
829 * Read a RTSP message from the server, or prepare to read data
830 * packets if we're reading data interleaved over the TCP/RTSP
831 * connection as well.
832 *
833 * @param s RTSP demuxer context
834 * @param reply pointer where the RTSP message header will be stored
835 * @param content_ptr pointer where the RTSP message body, if any, will
836 * be stored (length is in reply)
837 * @param return_on_interleaved_data whether the function may return if we
838 * encounter a data marker ('$'), which precedes data
839 * packets over interleaved TCP/RTSP connections. If this
840 * is set, this function will return 1 after encountering
841 * a '$'. If it is not set, the function will skip any
842 * data packets (if they are encountered), until a reply
843 * has been fully parsed. If no more data is available
844 * without parsing a reply, it will return an error.
845 *
846 * @returns 1 if a data packets is ready to be received, -1 on error,
847 * and 0 on success.
848 */
849 static int rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
850 unsigned char **content_ptr,
851 int return_on_interleaved_data)
852 {
853 RTSPState *rt = s->priv_data;
854 char buf[4096], buf1[1024], *q;
855 unsigned char ch;
856 const char *p;
857 int ret, content_length, line_count = 0;
858 unsigned char *content = NULL;
859
860 memset(reply, 0, sizeof(*reply));
861
862 /* parse reply (XXX: use buffers) */
863 rt->last_reply[0] = '\0';
864 for (;;) {
865 q = buf;
866 for (;;) {
867 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
868 #ifdef DEBUG_RTP_TCP
869 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
870 #endif
871 if (ret != 1)
872 return -1;
873 if (ch == '\n')
874 break;
875 if (ch == '$') {
876 /* XXX: only parse it if first char on line ? */
877 if (return_on_interleaved_data) {
878 return 1;
879 } else
880 rtsp_skip_packet(s);
881 } else if (ch != '\r') {
882 if ((q - buf) < sizeof(buf) - 1)
883 *q++ = ch;
884 }
885 }
886 *q = '\0';
887
888 dprintf(s, "line='%s'\n", buf);
889
890 /* test if last line */
891 if (buf[0] == '\0')
892 break;
893 p = buf;
894 if (line_count == 0) {
895 /* get reply code */
896 get_word(buf1, sizeof(buf1), &p);
897 get_word(buf1, sizeof(buf1), &p);
898 reply->status_code = atoi(buf1);
899 } else {
900 rtsp_parse_line(reply, p);
901 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
902 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
903 }
904 line_count++;
905 }
906
907 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
908 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
909
910 content_length = reply->content_length;
911 if (content_length > 0) {
912 /* leave some room for a trailing '\0' (useful for simple parsing) */
913 content = av_malloc(content_length + 1);
914 (void)url_read_complete(rt->rtsp_hd, content, content_length);
915 content[content_length] = '\0';
916 }
917 if (content_ptr)
918 *content_ptr = content;
919 else
920 av_free(content);
921
922 /* EOS */
923 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
924 reply->notice == 2104 /* Start-of-Stream Reached */ ||
925 reply->notice == 2306 /* Continuous Feed Terminated */) {
926 rt->state = RTSP_STATE_IDLE;
927 } else if (reply->notice >= 4400 && reply->notice < 5500) {
928 return AVERROR(EIO); /* data or server error */
929 } else if (reply->notice == 2401 /* Ticket Expired */ ||
930 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
931 return AVERROR(EPERM);
932
933 return 0;
934 }
935
936 static void rtsp_send_cmd_with_content_async(AVFormatContext *s,
937 const char *cmd,
938 const unsigned char *send_content,
939 int send_content_length)
940 {
941 RTSPState *rt = s->priv_data;
942 char buf[4096], buf1[1024];
943
944 rt->seq++;
945 av_strlcpy(buf, cmd, sizeof(buf));
946 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
947 av_strlcat(buf, buf1, sizeof(buf));
948 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
949 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
950 av_strlcat(buf, buf1, sizeof(buf));
951 }
952 if (rt->auth_b64)
953 av_strlcatf(buf, sizeof(buf),
954 "Authorization: Basic %s\r\n",
955 rt->auth_b64);
956 if (send_content_length > 0 && send_content)
957 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
958 av_strlcat(buf, "\r\n", sizeof(buf));
959
960 dprintf(s, "Sending:\n%s--\n", buf);
961
962 url_write(rt->rtsp_hd, buf, strlen(buf));
963 if (send_content_length > 0 && send_content)
964 url_write(rt->rtsp_hd, send_content, send_content_length);
965 rt->last_cmd_time = av_gettime();
966 }
967
968 static void rtsp_send_cmd_async(AVFormatContext *s, const char *cmd)
969 {
970 rtsp_send_cmd_with_content_async(s, cmd, NULL, 0);
971 }
972
973 static void rtsp_send_cmd(AVFormatContext *s,
974 const char *cmd, RTSPMessageHeader *reply,
975 unsigned char **content_ptr)
976 {
977 rtsp_send_cmd_async(s, cmd);
978
979 rtsp_read_reply(s, reply, content_ptr, 0);
980 }
981
982 static void rtsp_send_cmd_with_content(AVFormatContext *s,
983 const char *cmd,
984 RTSPMessageHeader *reply,
985 unsigned char **content_ptr,
986 const unsigned char *send_content,
987 int send_content_length)
988 {
989 rtsp_send_cmd_with_content_async(s, cmd, send_content, send_content_length);
990
991 rtsp_read_reply(s, reply, content_ptr, 0);
992 }
993
994 /**
995 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
996 */
997 static int make_setup_request(AVFormatContext *s, const char *host, int port,
998 int lower_transport, const char *real_challenge)
999 {
1000 RTSPState *rt = s->priv_data;
1001 int rtx, j, i, err, interleave = 0;
1002 RTSPStream *rtsp_st;
1003 RTSPMessageHeader reply1, *reply = &reply1;
1004 char cmd[2048];
1005 const char *trans_pref;
1006
1007 if (rt->transport == RTSP_TRANSPORT_RDT)
1008 trans_pref = "x-pn-tng";
1009 else
1010 trans_pref = "RTP/AVP";
1011
1012 /* default timeout: 1 minute */
1013 rt->timeout = 60;
1014
1015 /* for each stream, make the setup request */
1016 /* XXX: we assume the same server is used for the control of each
1017 * RTSP stream */
1018
1019 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1020 char transport[2048];
1021
1022 /**
1023 * WMS serves all UDP data over a single connection, the RTX, which
1024 * isn't necessarily the first in the SDP but has to be the first
1025 * to be set up, else the second/third SETUP will fail with a 461.
1026 */
1027 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1028 rt->server_type == RTSP_SERVER_WMS) {
1029 if (i == 0) {
1030 /* rtx first */
1031 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1032 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1033 if (len >= 4 &&
1034 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1035 "/rtx"))
1036 break;
1037 }
1038 if (rtx == rt->nb_rtsp_streams)
1039 return -1; /* no RTX found */
1040 rtsp_st = rt->rtsp_streams[rtx];
1041 } else
1042 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1043 } else
1044 rtsp_st = rt->rtsp_streams[i];
1045
1046 /* RTP/UDP */
1047 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1048 char buf[256];
1049
1050 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1051 port = reply->transports[0].client_port_min;
1052 goto have_port;
1053 }
1054
1055 /* first try in specified port range */
1056 if (RTSP_RTP_PORT_MIN != 0) {
1057 while (j <= RTSP_RTP_PORT_MAX) {
1058 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d",
1059 host, j);
1060 /* we will use two ports per rtp stream (rtp and rtcp) */
1061 j += 2;
1062 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1063 goto rtp_opened;
1064 }
1065 }
1066
1067 #if 0
1068 /* then try on any port */
1069 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1070 err = AVERROR_INVALIDDATA;
1071 goto fail;
1072 }
1073 #endif
1074
1075 rtp_opened:
1076 port = rtp_get_local_port(rtsp_st->rtp_handle);
1077 have_port:
1078 snprintf(transport, sizeof(transport) - 1,
1079 "%s/UDP;", trans_pref);
1080 if (rt->server_type != RTSP_SERVER_REAL)
1081 av_strlcat(transport, "unicast;", sizeof(transport));
1082 av_strlcatf(transport, sizeof(transport),
1083 "client_port=%d", port);
1084 if (rt->transport == RTSP_TRANSPORT_RTP &&
1085 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1086 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1087 }
1088
1089 /* RTP/TCP */
1090 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1091 /** For WMS streams, the application streams are only used for
1092 * UDP. When trying to set it up for TCP streams, the server
1093 * will return an error. Therefore, we skip those streams. */
1094 if (rt->server_type == RTSP_SERVER_WMS &&
1095 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1096 CODEC_TYPE_DATA)
1097 continue;
1098 snprintf(transport, sizeof(transport) - 1,
1099 "%s/TCP;", trans_pref);
1100 if (rt->server_type == RTSP_SERVER_WMS)
1101 av_strlcat(transport, "unicast;", sizeof(transport));
1102 av_strlcatf(transport, sizeof(transport),
1103 "interleaved=%d-%d",
1104 interleave, interleave + 1);
1105 interleave += 2;
1106 }
1107
1108 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1109 snprintf(transport, sizeof(transport) - 1,
1110 "%s/UDP;multicast", trans_pref);
1111 }
1112 if (rt->server_type == RTSP_SERVER_REAL ||
1113 rt->server_type == RTSP_SERVER_WMS)
1114 av_strlcat(transport, ";mode=play", sizeof(transport));
1115 snprintf(cmd, sizeof(cmd),
1116 "SETUP %s RTSP/1.0\r\n"
1117 "Transport: %s\r\n",
1118 rtsp_st->control_url, transport);
1119 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1120 char real_res[41], real_csum[9];
1121 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1122 real_challenge);
1123 av_strlcatf(cmd, sizeof(cmd),
1124 "If-Match: %s\r\n"
1125 "RealChallenge2: %s, sd=%s\r\n",
1126 rt->session_id, real_res, real_csum);
1127 }
1128 rtsp_send_cmd(s, cmd, reply, NULL);
1129 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1130 err = 1;
1131 goto fail;
1132 } else if (reply->status_code != RTSP_STATUS_OK ||
1133 reply->nb_transports != 1) {
1134 err = AVERROR_INVALIDDATA;
1135 goto fail;
1136 }
1137
1138 /* XXX: same protocol for all streams is required */
1139 if (i > 0) {
1140 if (reply->transports[0].lower_transport != rt->lower_transport ||
1141 reply->transports[0].transport != rt->transport) {
1142 err = AVERROR_INVALIDDATA;
1143 goto fail;
1144 }
1145 } else {
1146 rt->lower_transport = reply->transports[0].lower_transport;
1147 rt->transport = reply->transports[0].transport;
1148 }
1149
1150 /* close RTP connection if not choosen */
1151 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1152 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
1153 url_close(rtsp_st->rtp_handle);
1154 rtsp_st->rtp_handle = NULL;
1155 }
1156
1157 switch(reply->transports[0].lower_transport) {
1158 case RTSP_LOWER_TRANSPORT_TCP:
1159 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1160 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1161 break;
1162
1163 case RTSP_LOWER_TRANSPORT_UDP: {
1164 char url[1024];
1165
1166 /* XXX: also use address if specified */
1167 snprintf(url, sizeof(url), "rtp://%s:%d",
1168 host, reply->transports[0].server_port_min);
1169 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1170 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1171 err = AVERROR_INVALIDDATA;
1172 goto fail;
1173 }
1174 /* Try to initialize the connection state in a
1175 * potential NAT router by sending dummy packets.
1176 * RTP/RTCP dummy packets are used for RDT, too.
1177 */
1178 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1))
1179 rtp_send_punch_packets(rtsp_st->rtp_handle);
1180 break;
1181 }
1182 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1183 char url[1024];
1184 struct in_addr in;
1185 int port, ttl;
1186
1187 if (reply->transports[0].destination) {
1188 in.s_addr = htonl(reply->transports[0].destination);
1189 port = reply->transports[0].port_min;
1190 ttl = reply->transports[0].ttl;
1191 } else {
1192 in = rtsp_st->sdp_ip;
1193 port = rtsp_st->sdp_port;
1194 ttl = rtsp_st->sdp_ttl;
1195 }
1196 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1197 inet_ntoa(in), port, ttl);
1198 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1199 err = AVERROR_INVALIDDATA;
1200 goto fail;
1201 }
1202 break;
1203 }
1204 }
1205
1206 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1207 goto fail;
1208 }
1209
1210 if (reply->timeout > 0)
1211 rt->timeout = reply->timeout;
1212
1213 if (rt->server_type == RTSP_SERVER_REAL)
1214 rt->need_subscription = 1;
1215
1216 return 0;
1217
1218 fail:
1219 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1220 if (rt->rtsp_streams[i]->rtp_handle) {
1221 url_close(rt->rtsp_streams[i]->rtp_handle);
1222 rt->rtsp_streams[i]->rtp_handle = NULL;
1223 }
1224 }
1225 return err;
1226 }
1227
1228 static int rtsp_read_play(AVFormatContext *s)
1229 {
1230 RTSPState *rt = s->priv_data;
1231 RTSPMessageHeader reply1, *reply = &reply1;
1232 char cmd[1024];
1233
1234 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1235
1236 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1237 if (rt->state == RTSP_STATE_PAUSED) {
1238 snprintf(cmd, sizeof(cmd),
1239 "PLAY %s RTSP/1.0\r\n",
1240 rt->control_uri);
1241 } else {
1242 snprintf(cmd, sizeof(cmd),
1243 "PLAY %s RTSP/1.0\r\n"
1244 "Range: npt=%0.3f-\r\n",
1245 rt->control_uri,
1246 (double)rt->seek_timestamp / AV_TIME_BASE);
1247 }
1248 rtsp_send_cmd(s, cmd, reply, NULL);
1249 if (reply->status_code != RTSP_STATUS_OK) {
1250 return -1;
1251 }
1252 }
1253 rt->state = RTSP_STATE_STREAMING;
1254 return 0;
1255 }
1256
1257 static int rtsp_read_header(AVFormatContext *s,
1258 AVFormatParameters *ap)
1259 {
1260 RTSPState *rt = s->priv_data;
1261 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1262 char *option_list, *option, *filename;
1263 URLContext *rtsp_hd;
1264 int port, ret, err;
1265 RTSPMessageHeader reply1, *reply = &reply1;
1266 unsigned char *content = NULL;
1267 int lower_transport_mask = 0;
1268 char real_challenge[64];
1269 redirect:
1270 /* extract hostname and port */
1271 url_split(NULL, 0, auth, sizeof(auth),
1272 host, sizeof(host), &port, path, sizeof(path), s->filename);
1273 if (*auth) {
1274 int auth_len = strlen(auth), b64_len = ((auth_len + 2) / 3) * 4 + 1;
1275
1276 if (!(rt->auth_b64 = av_malloc(b64_len)))
1277 return AVERROR(ENOMEM);
1278 if (!av_base64_encode(rt->auth_b64, b64_len, auth, auth_len)) {
1279 err = AVERROR(EINVAL);
1280 goto fail;
1281 }
1282 }
1283 if (port < 0)
1284 port = RTSP_DEFAULT_PORT;
1285
1286 /* search for options */
1287 option_list = strchr(path, '?');
1288 if (option_list) {
1289 filename = strchr(s->filename, '?');
1290 while (option_list) {
1291 /* move the option pointer */
1292 option = ++option_list;
1293 option_list = strchr(option_list, '&');
1294 if (option_list)
1295 *option_list = 0;
1296
1297 /* handle the options */
1298 if (!strcmp(option, "udp")) {
1299 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
1300 } else if (!strcmp(option, "multicast")) {
1301 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1302 } else if (!strcmp(option, "tcp")) {
1303 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
1304 } else {
1305 strcpy(++filename, option);
1306 filename += strlen(option);
1307 if (option_list) *filename = '&';
1308 }
1309 }
1310 *filename = 0;
1311 }
1312
1313 if (!lower_transport_mask)
1314 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1315
1316 /* open the tcp connexion */
1317 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1318 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) {
1319 err = AVERROR(EIO);
1320 goto fail;
1321 }
1322 rt->rtsp_hd = rtsp_hd;
1323 rt->seq = 0;
1324
1325 /* request options supported by the server; this also detects server
1326 * type */
1327 av_strlcpy(rt->control_uri, s->filename,
1328 sizeof(rt->control_uri));
1329 for (rt->server_type = RTSP_SERVER_RTP;;) {
1330 snprintf(cmd, sizeof(cmd),
1331 "OPTIONS %s RTSP/1.0\r\n", s->filename);
1332 if (rt->server_type == RTSP_SERVER_REAL)
1333 av_strlcat(cmd,
1334 /**
1335 * The following entries are required for proper
1336 * streaming from a Realmedia server. They are
1337 * interdependent in some way although we currently
1338 * don't quite understand how. Values were copied
1339 * from mplayer SVN r23589.
1340 * @param CompanyID is a 16-byte ID in base64
1341 * @param ClientChallenge is a 16-byte ID in hex
1342 */
1343 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1344 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1345 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1346 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1347 sizeof(cmd));
1348 rtsp_send_cmd(s, cmd, reply, NULL);
1349 if (reply->status_code != RTSP_STATUS_OK) {
1350 err = AVERROR_INVALIDDATA;
1351 goto fail;
1352 }
1353
1354 /* detect server type if not standard-compliant RTP */
1355 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1356 rt->server_type = RTSP_SERVER_REAL;
1357 continue;
1358 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1359 rt->server_type = RTSP_SERVER_WMS;
1360 } else if (rt->server_type == RTSP_SERVER_REAL)
1361 strcpy(real_challenge, reply->real_challenge);
1362 break;
1363 }
1364
1365 /* describe the stream */
1366 snprintf(cmd, sizeof(cmd),
1367 "DESCRIBE %s RTSP/1.0\r\n"
1368 "Accept: application/sdp\r\n",
1369 s->filename);
1370 if (rt->server_type == RTSP_SERVER_REAL) {
1371 /**
1372 * The Require: attribute is needed for proper streaming from
1373 * Realmedia servers.
1374 */
1375 av_strlcat(cmd,
1376 "Require: com.real.retain-entity-for-setup\r\n",
1377 sizeof(cmd));
1378 }
1379 rtsp_send_cmd(s, cmd, reply, &content);
1380 if (!content) {
1381 err = AVERROR_INVALIDDATA;
1382 goto fail;
1383 }
1384 if (reply->status_code != RTSP_STATUS_OK) {
1385 err = AVERROR_INVALIDDATA;
1386 goto fail;
1387 }
1388
1389 /* now we got the SDP description, we parse it */
1390 ret = sdp_parse(s, (const char *)content);
1391 av_freep(&content);
1392 if (ret < 0) {
1393 err = AVERROR_INVALIDDATA;
1394 goto fail;
1395 }
1396
1397 do {
1398 int lower_transport = ff_log2_tab[lower_transport_mask &
1399 ~(lower_transport_mask - 1)];
1400
1401 err = make_setup_request(s, host, port, lower_transport,
1402 rt->server_type == RTSP_SERVER_REAL ?
1403 real_challenge : NULL);
1404 if (err < 0)
1405 goto fail;
1406 lower_transport_mask &= ~(1 << lower_transport);
1407 if (lower_transport_mask == 0 && err == 1) {
1408 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1409 goto fail;
1410 }
1411 } while (err);
1412
1413 rt->state = RTSP_STATE_IDLE;
1414 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1415 if (ap->initial_pause) {
1416 /* do not start immediately */
1417 } else {
1418 if (rtsp_read_play(s) < 0) {
1419 err = AVERROR_INVALIDDATA;
1420 goto fail;
1421 }
1422 }
1423 return 0;
1424 fail:
1425 rtsp_close_streams(s);
1426 av_freep(&content);
1427 url_close(rt->rtsp_hd);
1428 if (reply->status_code >=300 && reply->status_code < 400) {
1429 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1430 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1431 reply->status_code,
1432 s->filename);
1433 goto redirect;
1434 }
1435 return err;
1436 }
1437
1438 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1439 uint8_t *buf, int buf_size)
1440 {
1441 RTSPState *rt = s->priv_data;
1442 RTSPStream *rtsp_st;
1443 fd_set rfds;
1444 int fd, fd_max, n, i, ret, tcp_fd;
1445 struct timeval tv;
1446
1447 for (;;) {
1448 if (url_interrupt_cb())
1449 return AVERROR(EINTR);
1450 FD_ZERO(&rfds);
1451 if (rt->rtsp_hd) {
1452 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1453 FD_SET(tcp_fd, &rfds);
1454 } else {
1455 fd_max = 0;
1456 tcp_fd = -1;
1457 }
1458 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1459 rtsp_st = rt->rtsp_streams[i];
1460 if (rtsp_st->rtp_handle) {
1461 /* currently, we cannot probe RTCP handle because of
1462 * blocking restrictions */
1463 fd = url_get_file_handle(rtsp_st->rtp_handle);
1464 if (fd > fd_max)
1465 fd_max = fd;
1466 FD_SET(fd, &rfds);
1467 }
1468 }
1469 tv.tv_sec = 0;
1470 tv.tv_usec = 100 * 1000;
1471 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1472 if (n > 0) {
1473 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1474 rtsp_st = rt->rtsp_streams[i];
1475 if (rtsp_st->rtp_handle) {
1476 fd = url_get_file_handle(rtsp_st->rtp_handle);
1477 if (FD_ISSET(fd, &rfds)) {
1478 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1479 if (ret > 0) {
1480 *prtsp_st = rtsp_st;
1481 return ret;
1482 }
1483 }
1484 }
1485 }
1486 #if CONFIG_RTSP_DEMUXER
1487 if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
1488 RTSPMessageHeader reply;
1489
1490 rtsp_read_reply(s, &reply, NULL, 0);
1491 /* XXX: parse message */
1492 if (rt->state != RTSP_STATE_STREAMING)
1493 return 0;
1494 }
1495 #endif
1496 }
1497 }
1498 }
1499
1500 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1501 uint8_t *buf, int buf_size)
1502 {
1503 RTSPState *rt = s->priv_data;
1504 int id, len, i, ret;
1505 RTSPStream *rtsp_st;
1506
1507 #ifdef DEBUG_RTP_TCP
1508 dprintf(s, "tcp_read_packet:\n");
1509 #endif
1510 redo:
1511 for (;;) {
1512 RTSPMessageHeader reply;
1513
1514 ret = rtsp_read_reply(s, &reply, NULL, 1);
1515 if (ret == -1)
1516 return -1;
1517 if (ret == 1) /* received '$' */
1518 break;
1519 /* XXX: parse message */
1520 if (rt->state != RTSP_STATE_STREAMING)
1521 return 0;
1522 }
1523 ret = url_read_complete(rt->rtsp_hd, buf, 3);
1524 if (ret != 3)
1525 return -1;
1526 id = buf[0];
1527 len = AV_RB16(buf + 1);
1528 #ifdef DEBUG_RTP_TCP
1529 dprintf(s, "id=%d len=%d\n", id, len);
1530 #endif
1531 if (len > buf_size || len < 12)
1532 goto redo;
1533 /* get the data */
1534 ret = url_read_complete(rt->rtsp_hd, buf, len);
1535 if (ret != len)
1536 return -1;
1537 if (rt->transport == RTSP_TRANSPORT_RDT &&
1538 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
1539 return -1;
1540
1541 /* find the matching stream */
1542 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1543 rtsp_st = rt->rtsp_streams[i];
1544 if (id >= rtsp_st->interleaved_min &&
1545 id <= rtsp_st->interleaved_max)
1546 goto found;
1547 }
1548 goto redo;
1549 found:
1550 *prtsp_st = rtsp_st;
1551 return len;
1552 }
1553
1554 static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1555 {
1556 RTSPState *rt = s->priv_data;
1557 int ret, len;
1558 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1559 RTSPStream *rtsp_st;
1560
1561 /* get next frames from the same RTP packet */
1562 if (rt->cur_transport_priv) {
1563 if (rt->transport == RTSP_TRANSPORT_RDT) {
1564 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1565 } else
1566 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1567 if (ret == 0) {
1568 rt->cur_transport_priv = NULL;
1569 return 0;
1570 } else if (ret == 1) {
1571 return 0;
1572 } else
1573 rt->cur_transport_priv = NULL;
1574 }
1575
1576 /* read next RTP packet */
1577 redo:
1578 switch(rt->lower_transport) {
1579 default:
1580 #if CONFIG_RTSP_DEMUXER
1581 case RTSP_LOWER_TRANSPORT_TCP:
1582 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1583 break;
1584 #endif
1585 case RTSP_LOWER_TRANSPORT_UDP:
1586 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1587 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1588 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1589 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1590 break;
1591 }
1592 if (len < 0)
1593 return len;
1594 if (len == 0)
1595 return AVERROR_EOF;
1596 if (rt->transport == RTSP_TRANSPORT_RDT) {
1597 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1598 } else
1599 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1600 if (ret < 0)
1601 goto redo;
1602 if (ret == 1)
1603 /* more packets may follow, so we save the RTP context */
1604 rt->cur_transport_priv = rtsp_st->transport_priv;
1605
1606 return ret;
1607 }
1608
1609 static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
1610 {
1611 RTSPState *rt = s->priv_data;
1612 int ret;
1613 RTSPMessageHeader reply1, *reply = &reply1;
1614 char cmd[1024];
1615
1616 if (rt->server_type == RTSP_SERVER_REAL) {
1617 int i;
1618 enum AVDiscard cache[MAX_STREAMS];
1619
1620 for (i = 0; i < s->nb_streams; i++)
1621 cache[i] = s->streams[i]->discard;
1622
1623 if (!rt->need_subscription) {
1624 if (memcmp (cache, rt->real_setup_cache,
1625 sizeof(enum AVDiscard) * s->nb_streams)) {
1626 snprintf(cmd, sizeof(cmd),
1627 "SET_PARAMETER %s RTSP/1.0\r\n"
1628 "Unsubscribe: %s\r\n",
1629 rt->control_uri, rt->last_subscription);
1630 rtsp_send_cmd(s, cmd, reply, NULL);
1631 if (reply->status_code != RTSP_STATUS_OK)
1632 return AVERROR_INVALIDDATA;
1633 rt->need_subscription = 1;
1634 }
1635 }
1636
1637 if (rt->need_subscription) {
1638 int r, rule_nr, first = 1;
1639
1640 memcpy(rt->real_setup_cache, cache,
1641 sizeof(enum AVDiscard) * s->nb_streams);
1642 rt->last_subscription[0] = 0;
1643
1644 snprintf(cmd, sizeof(cmd),
1645 "SET_PARAMETER %s RTSP/1.0\r\n"
1646 "Subscribe: ",
1647 rt->control_uri);
1648 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1649 rule_nr = 0;
1650 for (r = 0; r < s->nb_streams; r++) {
1651 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1652 if (s->streams[r]->discard != AVDISCARD_ALL) {
1653 if (!first)
1654 av_strlcat(rt->last_subscription, ",",
1655 sizeof(rt->last_subscription));
1656 ff_rdt_subscribe_rule(
1657 rt->last_subscription,
1658 sizeof(rt->last_subscription), i, rule_nr);
1659 first = 0;
1660 }
1661 rule_nr++;
1662 }
1663 }
1664 }
1665 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1666 rtsp_send_cmd(s, cmd, reply, NULL);
1667 if (reply->status_code != RTSP_STATUS_OK)
1668 return AVERROR_INVALIDDATA;
1669 rt->need_subscription = 0;
1670
1671 if (rt->state == RTSP_STATE_STREAMING)
1672 rtsp_read_play (s);
1673 }
1674 }
1675
1676 ret = rtsp_fetch_packet(s, pkt);
1677 if (ret < 0)
1678 return ret;
1679
1680 /* send dummy request to keep TCP connection alive */
1681 if ((rt->server_type == RTSP_SERVER_WMS ||
1682 rt->server_type == RTSP_SERVER_REAL) &&
1683 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1684 if (rt->server_type == RTSP_SERVER_WMS) {
1685 snprintf(cmd, sizeof(cmd) - 1,
1686 "GET_PARAMETER %s RTSP/1.0\r\n",
1687 rt->control_uri);
1688 rtsp_send_cmd_async(s, cmd);
1689 } else {
1690 rtsp_send_cmd_async(s, "OPTIONS * RTSP/1.0\r\n");
1691 }
1692 }
1693
1694 return 0;
1695 }
1696
1697 /* pause the stream */
1698 static int rtsp_read_pause(AVFormatContext *s)
1699 {
1700 RTSPState *rt = s->priv_data;
1701 RTSPMessageHeader reply1, *reply = &reply1;
1702 char cmd[1024];
1703
1704 rt = s->priv_data;
1705
1706 if (rt->state != RTSP_STATE_STREAMING)
1707 return 0;
1708 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1709 snprintf(cmd, sizeof(cmd),
1710 "PAUSE %s RTSP/1.0\r\n",
1711 rt->control_uri);
1712 rtsp_send_cmd(s, cmd, reply, NULL);
1713 if (reply->status_code != RTSP_STATUS_OK) {
1714 return -1;
1715 }
1716 }
1717 rt->state = RTSP_STATE_PAUSED;
1718 return 0;
1719 }
1720
1721 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1722 int64_t timestamp, int flags)
1723 {
1724 RTSPState *rt = s->priv_data;
1725
1726 rt->seek_timestamp = av_rescale_q(timestamp,
1727 s->streams[stream_index]->time_base,
1728 AV_TIME_BASE_Q);
1729 switch(rt->state) {
1730 default:
1731 case RTSP_STATE_IDLE:
1732 break;
1733 case RTSP_STATE_STREAMING:
1734 if (rtsp_read_pause(s) != 0)
1735 return -1;
1736 rt->state = RTSP_STATE_SEEKING;
1737 if (rtsp_read_play(s) != 0)
1738 return -1;
1739 break;
1740 case RTSP_STATE_PAUSED:
1741 rt->state = RTSP_STATE_IDLE;
1742 break;
1743 }
1744 return 0;
1745 }
1746
1747 static int rtsp_read_close(AVFormatContext *s)
1748 {
1749 RTSPState *rt = s->priv_data;
1750 char cmd[1024];
1751
1752 #if 0
1753 /* NOTE: it is valid to flush the buffer here */
1754 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1755 url_fclose(&rt->rtsp_gb);
1756 }
1757 #endif
1758 snprintf(cmd, sizeof(cmd),
1759 "TEARDOWN %s RTSP/1.0\r\n",
1760 s->filename);
1761 rtsp_send_cmd_async(s, cmd);
1762
1763 rtsp_close_streams(s);
1764 url_close(rt->rtsp_hd);
1765 return 0;
1766 }
1767
1768 AVInputFormat rtsp_demuxer = {
1769 "rtsp",
1770 NULL_IF_CONFIG_SMALL("RTSP input format"),
1771 sizeof(RTSPState),
1772 rtsp_probe,
1773 rtsp_read_header,
1774 rtsp_read_packet,
1775 rtsp_read_close,
1776 rtsp_read_seek,
1777 .flags = AVFMT_NOFILE,
1778 .read_play = rtsp_read_play,
1779 .read_pause = rtsp_read_pause,
1780 };
1781 #endif
1782
1783 static int sdp_probe(AVProbeData *p1)
1784 {
1785 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1786
1787 /* we look for a line beginning "c=IN IP4" */
1788 while (p < p_end && *p != '\0') {
1789 if (p + sizeof("c=IN IP4") - 1 < p_end &&
1790 av_strstart(p, "c=IN IP4", NULL))
1791 return AVPROBE_SCORE_MAX / 2;
1792
1793 while (p < p_end - 1 && *p != '\n') p++;
1794 if (++p >= p_end)
1795 break;
1796 if (*p == '\r')
1797 p++;
1798 }
1799 return 0;
1800 }
1801
1802 #define SDP_MAX_SIZE 8192
1803
1804 static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1805 {
1806 RTSPState *rt = s->priv_data;
1807 RTSPStream *rtsp_st;
1808 int size, i, err;
1809 char *content;
1810 char url[1024];
1811
1812 /* read the whole sdp file */
1813 /* XXX: better loading */
1814 content = av_malloc(SDP_MAX_SIZE);
1815 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1816 if (size <= 0) {
1817 av_free(content);
1818 return AVERROR_INVALIDDATA;
1819 }
1820 content[size] ='\0';
1821
1822 sdp_parse(s, content);
1823 av_free(content);
1824
1825 /* open each RTP stream */
1826 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1827 rtsp_st = rt->rtsp_streams[i];
1828
1829 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1830 inet_ntoa(rtsp_st->sdp_ip),
1831 rtsp_st->sdp_port,
1832 rtsp_st->sdp_port,
1833 rtsp_st->sdp_ttl);
1834 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1835 err = AVERROR_INVALIDDATA;
1836 goto fail;
1837 }
1838 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1839 goto fail;
1840 }
1841 return 0;
1842 fail:
1843 rtsp_close_streams(s);
1844 return err;
1845 }
1846
1847 static int sdp_read_close(AVFormatContext *s)
1848 {
1849 rtsp_close_streams(s);
1850 return 0;
1851 }
1852
1853 AVInputFormat sdp_demuxer = {
1854 "sdp",
1855 NULL_IF_CONFIG_SMALL("SDP"),
1856 sizeof(RTSPState),
1857 sdp_probe,
1858 sdp_read_header,
1859 rtsp_fetch_packet,
1860 sdp_read_close,
1861 };