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Merge remote-tracking branch 'libav/master'
[FFMpeg-mirror/mplayer-patches.git] / libavformat / rtsp.c
blob1ce28d64574fcba4dfef5e350cc75e96fde9bcc4
1 /*
2 * RTSP/SDP client
3 * Copyright (c) 2002 Fabrice Bellard
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/base64.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/mathematics.h"
26 #include "libavutil/parseutils.h"
27 #include "libavutil/random_seed.h"
28 #include "libavutil/dict.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/time.h"
31 #include "avformat.h"
32 #include "avio_internal.h"
33
34 #if HAVE_POLL_H
35 #include <poll.h>
36 #endif
37 #include "internal.h"
38 #include "network.h"
39 #include "os_support.h"
40 #include "http.h"
41 #include "rtsp.h"
42
43 #include "rtpdec.h"
44 #include "rdt.h"
45 #include "rtpdec_formats.h"
46 #include "rtpenc_chain.h"
47 #include "url.h"
48 #include "rtpenc.h"
49 #include "mpegts.h"
50
51 //#define DEBUG
52
53 /* Timeout values for socket poll, in ms,
54 * and read_packet(), in seconds */
55 #define POLL_TIMEOUT_MS 100
56 #define READ_PACKET_TIMEOUT_S 10
57 #define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / POLL_TIMEOUT_MS
58 #define SDP_MAX_SIZE 16384
59 #define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
60 #define DEFAULT_REORDERING_DELAY 100000
61
62 #define OFFSET(x) offsetof(RTSPState, x)
63 #define DEC AV_OPT_FLAG_DECODING_PARAM
64 #define ENC AV_OPT_FLAG_ENCODING_PARAM
65
66 #define RTSP_FLAG_OPTS(name, longname) \
67 { name, longname, OFFSET(rtsp_flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC, "rtsp_flags" }, \
68 { "filter_src", "Only receive packets from the negotiated peer IP", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_FILTER_SRC}, 0, 0, DEC, "rtsp_flags" }, \
69 { "listen", "Wait for incoming connections", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_LISTEN}, 0, 0, DEC, "rtsp_flags" }
70
71 #define RTSP_MEDIATYPE_OPTS(name, longname) \
72 { name, longname, OFFSET(media_type_mask), AV_OPT_TYPE_FLAGS, { .i64 = (1 << (AVMEDIA_TYPE_DATA+1)) - 1 }, INT_MIN, INT_MAX, DEC, "allowed_media_types" }, \
73 { "video", "Video", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_VIDEO}, 0, 0, DEC, "allowed_media_types" }, \
74 { "audio", "Audio", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_AUDIO}, 0, 0, DEC, "allowed_media_types" }, \
75 { "data", "Data", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_DATA}, 0, 0, DEC, "allowed_media_types" }
76
77 #define RTSP_REORDERING_OPTS() \
78 { "reorder_queue_size", "Number of packets to buffer for handling of reordered packets", OFFSET(reordering_queue_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, DEC }
79
80 const AVOption ff_rtsp_options[] = {
81 { "initial_pause", "Don't start playing the stream immediately", OFFSET(initial_pause), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DEC },
82 FF_RTP_FLAG_OPTS(RTSPState, rtp_muxer_flags),
83 { "rtsp_transport", "RTSP transport protocols", OFFSET(lower_transport_mask), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC|ENC, "rtsp_transport" }, \
84 { "udp", "UDP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
85 { "tcp", "TCP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_TCP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
86 { "udp_multicast", "UDP multicast", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP_MULTICAST}, 0, 0, DEC, "rtsp_transport" },
87 { "http", "HTTP tunneling", 0, AV_OPT_TYPE_CONST, {.i64 = (1 << RTSP_LOWER_TRANSPORT_HTTP)}, 0, 0, DEC, "rtsp_transport" },
88 RTSP_FLAG_OPTS("rtsp_flags", "RTSP flags"),
89 RTSP_MEDIATYPE_OPTS("allowed_media_types", "Media types to accept from the server"),
90 { "min_port", "Minimum local UDP port", OFFSET(rtp_port_min), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MIN}, 0, 65535, DEC|ENC },
91 { "max_port", "Maximum local UDP port", OFFSET(rtp_port_max), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MAX}, 0, 65535, DEC|ENC },
92 { "timeout", "Maximum timeout (in seconds) to wait for incoming connections. -1 is infinite. Implies flag listen", OFFSET(initial_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, DEC },
93 RTSP_REORDERING_OPTS(),
94 { NULL },
95 };
96
97 static const AVOption sdp_options[] = {
98 RTSP_FLAG_OPTS("sdp_flags", "SDP flags"),
99 { "custom_io", "Use custom IO", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_CUSTOM_IO}, 0, 0, DEC, "rtsp_flags" },
100 RTSP_MEDIATYPE_OPTS("allowed_media_types", "Media types to accept from the server"),
101 RTSP_REORDERING_OPTS(),
102 { NULL },
103 };
104
105 static const AVOption rtp_options[] = {
106 RTSP_FLAG_OPTS("rtp_flags", "RTP flags"),
107 RTSP_REORDERING_OPTS(),
108 { NULL },
109 };
110
111 static void get_word_until_chars(char *buf, int buf_size,
112 const char *sep, const char **pp)
113 {
114 const char *p;
115 char *q;
116
117 p = *pp;
118 p += strspn(p, SPACE_CHARS);
119 q = buf;
120 while (!strchr(sep, *p) && *p != '\0') {
121 if ((q - buf) < buf_size - 1)
122 *q++ = *p;
123 p++;
124 }
125 if (buf_size > 0)
126 *q = '\0';
127 *pp = p;
128 }
129
130 static void get_word_sep(char *buf, int buf_size, const char *sep,
131 const char **pp)
132 {
133 if (**pp == '/') (*pp)++;
134 get_word_until_chars(buf, buf_size, sep, pp);
135 }
136
137 static void get_word(char *buf, int buf_size, const char **pp)
138 {
139 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
140 }
141
142 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
143 * and end time.
144 * Used for seeking in the rtp stream.
145 */
146 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
147 {
148 char buf[256];
149
150 p += strspn(p, SPACE_CHARS);
151 if (!av_stristart(p, "npt=", &p))
152 return;
153
154 *start = AV_NOPTS_VALUE;
155 *end = AV_NOPTS_VALUE;
156
157 get_word_sep(buf, sizeof(buf), "-", &p);
158 av_parse_time(start, buf, 1);
159 if (*p == '-') {
160 p++;
161 get_word_sep(buf, sizeof(buf), "-", &p);
162 av_parse_time(end, buf, 1);
163 }
164 }
165
166 static int get_sockaddr(const char *buf, struct sockaddr_storage *sock)
167 {
168 struct addrinfo hints = { 0 }, *ai = NULL;
169 hints.ai_flags = AI_NUMERICHOST;
170 if (getaddrinfo(buf, NULL, &hints, &ai))
171 return -1;
172 memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
173 freeaddrinfo(ai);
174 return 0;
175 }
176
177 #if CONFIG_RTPDEC
178 static void init_rtp_handler(RTPDynamicProtocolHandler *handler,
179 RTSPStream *rtsp_st, AVCodecContext *codec)
180 {
181 if (!handler)
182 return;
183 if (codec)
184 codec->codec_id = handler->codec_id;
185 rtsp_st->dynamic_handler = handler;
186 if (handler->alloc) {
187 rtsp_st->dynamic_protocol_context = handler->alloc();
188 if (!rtsp_st->dynamic_protocol_context)
189 rtsp_st->dynamic_handler = NULL;
190 }
191 }
192
193 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
194 static int sdp_parse_rtpmap(AVFormatContext *s,
195 AVStream *st, RTSPStream *rtsp_st,
196 int payload_type, const char *p)
197 {
198 AVCodecContext *codec = st->codec;
199 char buf[256];
200 int i;
201 AVCodec *c;
202 const char *c_name;
203
204 /* See if we can handle this kind of payload.
205 * The space should normally not be there but some Real streams or
206 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
207 * have a trailing space. */
208 get_word_sep(buf, sizeof(buf), "/ ", &p);
209 if (payload_type < RTP_PT_PRIVATE) {
210 /* We are in a standard case
211 * (from http://www.iana.org/assignments/rtp-parameters). */
212 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
213 }
214
215 if (codec->codec_id == AV_CODEC_ID_NONE) {
216 RTPDynamicProtocolHandler *handler =
217 ff_rtp_handler_find_by_name(buf, codec->codec_type);
218 init_rtp_handler(handler, rtsp_st, codec);
219 /* If no dynamic handler was found, check with the list of standard
220 * allocated types, if such a stream for some reason happens to
221 * use a private payload type. This isn't handled in rtpdec.c, since
222 * the format name from the rtpmap line never is passed into rtpdec. */
223 if (!rtsp_st->dynamic_handler)
224 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
225 }
226
227 c = avcodec_find_decoder(codec->codec_id);
228 if (c && c->name)
229 c_name = c->name;
230 else
231 c_name = "(null)";
232
233 get_word_sep(buf, sizeof(buf), "/", &p);
234 i = atoi(buf);
235 switch (codec->codec_type) {
236 case AVMEDIA_TYPE_AUDIO:
237 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
238 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
239 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
240 if (i > 0) {
241 codec->sample_rate = i;
242 avpriv_set_pts_info(st, 32, 1, codec->sample_rate);
243 get_word_sep(buf, sizeof(buf), "/", &p);
244 i = atoi(buf);
245 if (i > 0)
246 codec->channels = i;
247 }
248 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
249 codec->sample_rate);
250 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
251 codec->channels);
252 break;
253 case AVMEDIA_TYPE_VIDEO:
254 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
255 if (i > 0)
256 avpriv_set_pts_info(st, 32, 1, i);
257 break;
258 default:
259 break;
260 }
261 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->init)
262 rtsp_st->dynamic_handler->init(s, st->index,
263 rtsp_st->dynamic_protocol_context);
264 return 0;
265 }
266
267 /* parse the attribute line from the fmtp a line of an sdp response. This
268 * is broken out as a function because it is used in rtp_h264.c, which is
269 * forthcoming. */
270 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
271 char *value, int value_size)
272 {
273 *p += strspn(*p, SPACE_CHARS);
274 if (**p) {
275 get_word_sep(attr, attr_size, "=", p);
276 if (**p == '=')
277 (*p)++;
278 get_word_sep(value, value_size, ";", p);
279 if (**p == ';')
280 (*p)++;
281 return 1;
282 }
283 return 0;
284 }
285
286 typedef struct SDPParseState {
287 /* SDP only */
288 struct sockaddr_storage default_ip;
289 int default_ttl;
290 int skip_media; ///< set if an unknown m= line occurs
291 } SDPParseState;
292
293 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
294 int letter, const char *buf)
295 {
296 RTSPState *rt = s->priv_data;
297 char buf1[64], st_type[64];
298 const char *p;
299 enum AVMediaType codec_type;
300 int payload_type, i;
301 AVStream *st;
302 RTSPStream *rtsp_st;
303 struct sockaddr_storage sdp_ip;
304 int ttl;
305
306 av_dlog(s, "sdp: %c='%s'\n", letter, buf);
307
308 p = buf;
309 if (s1->skip_media && letter != 'm')
310 return;
311 switch (letter) {
312 case 'c':
313 get_word(buf1, sizeof(buf1), &p);
314 if (strcmp(buf1, "IN") != 0)
315 return;
316 get_word(buf1, sizeof(buf1), &p);
317 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
318 return;
319 get_word_sep(buf1, sizeof(buf1), "/", &p);
320 if (get_sockaddr(buf1, &sdp_ip))
321 return;
322 ttl = 16;
323 if (*p == '/') {
324 p++;
325 get_word_sep(buf1, sizeof(buf1), "/", &p);
326 ttl = atoi(buf1);
327 }
328 if (s->nb_streams == 0) {
329 s1->default_ip = sdp_ip;
330 s1->default_ttl = ttl;
331 } else {
332 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
333 rtsp_st->sdp_ip = sdp_ip;
334 rtsp_st->sdp_ttl = ttl;
335 }
336 break;
337 case 's':
338 av_dict_set(&s->metadata, "title", p, 0);
339 break;
340 case 'i':
341 if (s->nb_streams == 0) {
342 av_dict_set(&s->metadata, "comment", p, 0);
343 break;
344 }
345 break;
346 case 'm':
347 /* new stream */
348 s1->skip_media = 0;
349 codec_type = AVMEDIA_TYPE_UNKNOWN;
350 get_word(st_type, sizeof(st_type), &p);
351 if (!strcmp(st_type, "audio")) {
352 codec_type = AVMEDIA_TYPE_AUDIO;
353 } else if (!strcmp(st_type, "video")) {
354 codec_type = AVMEDIA_TYPE_VIDEO;
355 } else if (!strcmp(st_type, "application")) {
356 codec_type = AVMEDIA_TYPE_DATA;
357 }
358 if (codec_type == AVMEDIA_TYPE_UNKNOWN || !(rt->media_type_mask & (1 << codec_type))) {
359 s1->skip_media = 1;
360 return;
361 }
362 rtsp_st = av_mallocz(sizeof(RTSPStream));
363 if (!rtsp_st)
364 return;
365 rtsp_st->stream_index = -1;
366 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
367
368 rtsp_st->sdp_ip = s1->default_ip;
369 rtsp_st->sdp_ttl = s1->default_ttl;
370
371 get_word(buf1, sizeof(buf1), &p); /* port */
372 rtsp_st->sdp_port = atoi(buf1);
373
374 get_word(buf1, sizeof(buf1), &p); /* protocol */
375 if (!strcmp(buf1, "udp"))
376 rt->transport = RTSP_TRANSPORT_RAW;
377 else if (strstr(buf1, "/AVPF") || strstr(buf1, "/SAVPF"))
378 rtsp_st->feedback = 1;
379
380 /* XXX: handle list of formats */
381 get_word(buf1, sizeof(buf1), &p); /* format list */
382 rtsp_st->sdp_payload_type = atoi(buf1);
383
384 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
385 /* no corresponding stream */
386 if (rt->transport == RTSP_TRANSPORT_RAW) {
387 if (!rt->ts && CONFIG_RTPDEC)
388 rt->ts = ff_mpegts_parse_open(s);
389 } else {
390 RTPDynamicProtocolHandler *handler;
391 handler = ff_rtp_handler_find_by_id(
392 rtsp_st->sdp_payload_type, AVMEDIA_TYPE_DATA);
393 init_rtp_handler(handler, rtsp_st, NULL);
394 if (handler && handler->init)
395 handler->init(s, -1, rtsp_st->dynamic_protocol_context);
396 }
397 } else if (rt->server_type == RTSP_SERVER_WMS &&
398 codec_type == AVMEDIA_TYPE_DATA) {
399 /* RTX stream, a stream that carries all the other actual
400 * audio/video streams. Don't expose this to the callers. */
401 } else {
402 st = avformat_new_stream(s, NULL);
403 if (!st)
404 return;
405 st->id = rt->nb_rtsp_streams - 1;
406 rtsp_st->stream_index = st->index;
407 st->codec->codec_type = codec_type;
408 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
409 RTPDynamicProtocolHandler *handler;
410 /* if standard payload type, we can find the codec right now */
411 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
412 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
413 st->codec->sample_rate > 0)
414 avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate);
415 /* Even static payload types may need a custom depacketizer */
416 handler = ff_rtp_handler_find_by_id(
417 rtsp_st->sdp_payload_type, st->codec->codec_type);
418 init_rtp_handler(handler, rtsp_st, st->codec);
419 if (handler && handler->init)
420 handler->init(s, st->index,
421 rtsp_st->dynamic_protocol_context);
422 }
423 }
424 /* put a default control url */
425 av_strlcpy(rtsp_st->control_url, rt->control_uri,
426 sizeof(rtsp_st->control_url));
427 break;
428 case 'a':
429 if (av_strstart(p, "control:", &p)) {
430 if (s->nb_streams == 0) {
431 if (!strncmp(p, "rtsp://", 7))
432 av_strlcpy(rt->control_uri, p,
433 sizeof(rt->control_uri));
434 } else {
435 char proto[32];
436 /* get the control url */
437 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
438
439 /* XXX: may need to add full url resolution */
440 av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
441 NULL, NULL, 0, p);
442 if (proto[0] == '\0') {
443 /* relative control URL */
444 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
445 av_strlcat(rtsp_st->control_url, "/",
446 sizeof(rtsp_st->control_url));
447 av_strlcat(rtsp_st->control_url, p,
448 sizeof(rtsp_st->control_url));
449 } else
450 av_strlcpy(rtsp_st->control_url, p,
451 sizeof(rtsp_st->control_url));
452 }
453 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
454 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
455 get_word(buf1, sizeof(buf1), &p);
456 payload_type = atoi(buf1);
457 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
458 if (rtsp_st->stream_index >= 0) {
459 st = s->streams[rtsp_st->stream_index];
460 sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
461 }
462 } else if (av_strstart(p, "fmtp:", &p) ||
463 av_strstart(p, "framesize:", &p)) {
464 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
465 // let dynamic protocol handlers have a stab at the line.
466 get_word(buf1, sizeof(buf1), &p);
467 payload_type = atoi(buf1);
468 for (i = 0; i < rt->nb_rtsp_streams; i++) {
469 rtsp_st = rt->rtsp_streams[i];
470 if (rtsp_st->sdp_payload_type == payload_type &&
471 rtsp_st->dynamic_handler &&
472 rtsp_st->dynamic_handler->parse_sdp_a_line)
473 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
474 rtsp_st->dynamic_protocol_context, buf);
475 }
476 } else if (av_strstart(p, "range:", &p)) {
477 int64_t start, end;
478
479 // this is so that seeking on a streamed file can work.
480 rtsp_parse_range_npt(p, &start, &end);
481 s->start_time = start;
482 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
483 s->duration = (end == AV_NOPTS_VALUE) ?
484 AV_NOPTS_VALUE : end - start;
485 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
486 if (atoi(p) == 1)
487 rt->transport = RTSP_TRANSPORT_RDT;
488 } else if (av_strstart(p, "SampleRate:integer;", &p) &&
489 s->nb_streams > 0) {
490 st = s->streams[s->nb_streams - 1];
491 st->codec->sample_rate = atoi(p);
492 } else if (av_strstart(p, "crypto:", &p) && s->nb_streams > 0) {
493 // RFC 4568
494 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
495 get_word(buf1, sizeof(buf1), &p); // ignore tag
496 get_word(rtsp_st->crypto_suite, sizeof(rtsp_st->crypto_suite), &p);
497 p += strspn(p, SPACE_CHARS);
498 if (av_strstart(p, "inline:", &p))
499 get_word(rtsp_st->crypto_params, sizeof(rtsp_st->crypto_params), &p);
500 } else {
501 if (rt->server_type == RTSP_SERVER_WMS)
502 ff_wms_parse_sdp_a_line(s, p);
503 if (s->nb_streams > 0) {
504 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
505
506 if (rt->server_type == RTSP_SERVER_REAL)
507 ff_real_parse_sdp_a_line(s, rtsp_st->stream_index, p);
508
509 if (rtsp_st->dynamic_handler &&
510 rtsp_st->dynamic_handler->parse_sdp_a_line)
511 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
512 rtsp_st->stream_index,
513 rtsp_st->dynamic_protocol_context, buf);
514 }
515 }
516 break;
517 }
518 }
519
520 int ff_sdp_parse(AVFormatContext *s, const char *content)
521 {
522 RTSPState *rt = s->priv_data;
523 const char *p;
524 int letter;
525 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
526 * contain long SDP lines containing complete ASF Headers (several
527 * kB) or arrays of MDPR (RM stream descriptor) headers plus
528 * "rulebooks" describing their properties. Therefore, the SDP line
529 * buffer is large.
530 *
531 * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
532 * in rtpdec_xiph.c. */
533 char buf[16384], *q;
534 SDPParseState sdp_parse_state = { { 0 } }, *s1 = &sdp_parse_state;
535
536 p = content;
537 for (;;) {
538 p += strspn(p, SPACE_CHARS);
539 letter = *p;
540 if (letter == '\0')
541 break;
542 p++;
543 if (*p != '=')
544 goto next_line;
545 p++;
546 /* get the content */
547 q = buf;
548 while (*p != '\n' && *p != '\r' && *p != '\0') {
549 if ((q - buf) < sizeof(buf) - 1)
550 *q++ = *p;
551 p++;
552 }
553 *q = '\0';
554 sdp_parse_line(s, s1, letter, buf);
555 next_line:
556 while (*p != '\n' && *p != '\0')
557 p++;
558 if (*p == '\n')
559 p++;
560 }
561 rt->p = av_malloc(sizeof(struct pollfd)*2*(rt->nb_rtsp_streams+1));
562 if (!rt->p) return AVERROR(ENOMEM);
563 return 0;
564 }
565 #endif /* CONFIG_RTPDEC */
566
567 void ff_rtsp_undo_setup(AVFormatContext *s)
568 {
569 RTSPState *rt = s->priv_data;
570 int i;
571
572 for (i = 0; i < rt->nb_rtsp_streams; i++) {
573 RTSPStream *rtsp_st = rt->rtsp_streams[i];
574 if (!rtsp_st)
575 continue;
576 if (rtsp_st->transport_priv) {
577 if (s->oformat) {
578 AVFormatContext *rtpctx = rtsp_st->transport_priv;
579 av_write_trailer(rtpctx);
580 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
581 uint8_t *ptr;
582 avio_close_dyn_buf(rtpctx->pb, &ptr);
583 av_free(ptr);
584 } else {
585 avio_close(rtpctx->pb);
586 }
587 avformat_free_context(rtpctx);
588 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
589 ff_rdt_parse_close(rtsp_st->transport_priv);
590 else if (rt->transport == RTSP_TRANSPORT_RTP && CONFIG_RTPDEC)
591 ff_rtp_parse_close(rtsp_st->transport_priv);
592 }
593 rtsp_st->transport_priv = NULL;
594 if (rtsp_st->rtp_handle)
595 ffurl_close(rtsp_st->rtp_handle);
596 rtsp_st->rtp_handle = NULL;
597 }
598 }
599
600 /* close and free RTSP streams */
601 void ff_rtsp_close_streams(AVFormatContext *s)
602 {
603 RTSPState *rt = s->priv_data;
604 int i;
605 RTSPStream *rtsp_st;
606
607 ff_rtsp_undo_setup(s);
608 for (i = 0; i < rt->nb_rtsp_streams; i++) {
609 rtsp_st = rt->rtsp_streams[i];
610 if (rtsp_st) {
611 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
612 rtsp_st->dynamic_handler->free(
613 rtsp_st->dynamic_protocol_context);
614 av_free(rtsp_st);
615 }
616 }
617 av_free(rt->rtsp_streams);
618 if (rt->asf_ctx) {
619 avformat_close_input(&rt->asf_ctx);
620 }
621 if (rt->ts && CONFIG_RTPDEC)
622 ff_mpegts_parse_close(rt->ts);
623 av_free(rt->p);
624 av_free(rt->recvbuf);
625 }
626
627 int ff_rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
628 {
629 RTSPState *rt = s->priv_data;
630 AVStream *st = NULL;
631 int reordering_queue_size = rt->reordering_queue_size;
632 if (reordering_queue_size < 0) {
633 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
634 reordering_queue_size = 0;
635 else
636 reordering_queue_size = RTP_REORDER_QUEUE_DEFAULT_SIZE;
637 }
638
639 /* open the RTP context */
640 if (rtsp_st->stream_index >= 0)
641 st = s->streams[rtsp_st->stream_index];
642 if (!st)
643 s->ctx_flags |= AVFMTCTX_NOHEADER;
644
645 if (s->oformat && CONFIG_RTSP_MUXER) {
646 int ret = ff_rtp_chain_mux_open(&rtsp_st->transport_priv, s, st,
647 rtsp_st->rtp_handle,
648 RTSP_TCP_MAX_PACKET_SIZE,
649 rtsp_st->stream_index);
650 /* Ownership of rtp_handle is passed to the rtp mux context */
651 rtsp_st->rtp_handle = NULL;
652 if (ret < 0)
653 return ret;
654 } else if (rt->transport == RTSP_TRANSPORT_RAW) {
655 return 0; // Don't need to open any parser here
656 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
657 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
658 rtsp_st->dynamic_protocol_context,
659 rtsp_st->dynamic_handler);
660 else if (CONFIG_RTPDEC)
661 rtsp_st->transport_priv = ff_rtp_parse_open(s, st,
662 rtsp_st->sdp_payload_type,
663 reordering_queue_size);
664
665 if (!rtsp_st->transport_priv) {
666 return AVERROR(ENOMEM);
667 } else if (rt->transport == RTSP_TRANSPORT_RTP && CONFIG_RTPDEC) {
668 if (rtsp_st->dynamic_handler) {
669 ff_rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
670 rtsp_st->dynamic_protocol_context,
671 rtsp_st->dynamic_handler);
672 }
673 if (rtsp_st->crypto_suite[0])
674 ff_rtp_parse_set_crypto(rtsp_st->transport_priv,
675 rtsp_st->crypto_suite,
676 rtsp_st->crypto_params);
677 }
678
679 return 0;
680 }
681
682 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
683 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
684 {
685 const char *q;
686 char *p;
687 int v;
688
689 q = *pp;
690 q += strspn(q, SPACE_CHARS);
691 v = strtol(q, &p, 10);
692 if (*p == '-') {
693 p++;
694 *min_ptr = v;
695 v = strtol(p, &p, 10);
696 *max_ptr = v;
697 } else {
698 *min_ptr = v;
699 *max_ptr = v;
700 }
701 *pp = p;
702 }
703
704 /* XXX: only one transport specification is parsed */
705 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
706 {
707 char transport_protocol[16];
708 char profile[16];
709 char lower_transport[16];
710 char parameter[16];
711 RTSPTransportField *th;
712 char buf[256];
713
714 reply->nb_transports = 0;
715
716 for (;;) {
717 p += strspn(p, SPACE_CHARS);
718 if (*p == '\0')
719 break;
720
721 th = &reply->transports[reply->nb_transports];
722
723 get_word_sep(transport_protocol, sizeof(transport_protocol),
724 "/", &p);
725 if (!av_strcasecmp (transport_protocol, "rtp")) {
726 get_word_sep(profile, sizeof(profile), "/;,", &p);
727 lower_transport[0] = '\0';
728 /* rtp/avp/<protocol> */
729 if (*p == '/') {
730 get_word_sep(lower_transport, sizeof(lower_transport),
731 ";,", &p);
732 }
733 th->transport = RTSP_TRANSPORT_RTP;
734 } else if (!av_strcasecmp (transport_protocol, "x-pn-tng") ||
735 !av_strcasecmp (transport_protocol, "x-real-rdt")) {
736 /* x-pn-tng/<protocol> */
737 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
738 profile[0] = '\0';
739 th->transport = RTSP_TRANSPORT_RDT;
740 } else if (!av_strcasecmp(transport_protocol, "raw")) {
741 get_word_sep(profile, sizeof(profile), "/;,", &p);
742 lower_transport[0] = '\0';
743 /* raw/raw/<protocol> */
744 if (*p == '/') {
745 get_word_sep(lower_transport, sizeof(lower_transport),
746 ";,", &p);
747 }
748 th->transport = RTSP_TRANSPORT_RAW;
749 }
750 if (!av_strcasecmp(lower_transport, "TCP"))
751 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
752 else
753 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
754
755 if (*p == ';')
756 p++;
757 /* get each parameter */
758 while (*p != '\0' && *p != ',') {
759 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
760 if (!strcmp(parameter, "port")) {
761 if (*p == '=') {
762 p++;
763 rtsp_parse_range(&th->port_min, &th->port_max, &p);
764 }
765 } else if (!strcmp(parameter, "client_port")) {
766 if (*p == '=') {
767 p++;
768 rtsp_parse_range(&th->client_port_min,
769 &th->client_port_max, &p);
770 }
771 } else if (!strcmp(parameter, "server_port")) {
772 if (*p == '=') {
773 p++;
774 rtsp_parse_range(&th->server_port_min,
775 &th->server_port_max, &p);
776 }
777 } else if (!strcmp(parameter, "interleaved")) {
778 if (*p == '=') {
779 p++;
780 rtsp_parse_range(&th->interleaved_min,
781 &th->interleaved_max, &p);
782 }
783 } else if (!strcmp(parameter, "multicast")) {
784 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
785 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
786 } else if (!strcmp(parameter, "ttl")) {
787 if (*p == '=') {
788 char *end;
789 p++;
790 th->ttl = strtol(p, &end, 10);
791 p = end;
792 }
793 } else if (!strcmp(parameter, "destination")) {
794 if (*p == '=') {
795 p++;
796 get_word_sep(buf, sizeof(buf), ";,", &p);
797 get_sockaddr(buf, &th->destination);
798 }
799 } else if (!strcmp(parameter, "source")) {
800 if (*p == '=') {
801 p++;
802 get_word_sep(buf, sizeof(buf), ";,", &p);
803 av_strlcpy(th->source, buf, sizeof(th->source));
804 }
805 } else if (!strcmp(parameter, "mode")) {
806 if (*p == '=') {
807 p++;
808 get_word_sep(buf, sizeof(buf), ";, ", &p);
809 if (!strcmp(buf, "record") ||
810 !strcmp(buf, "receive"))
811 th->mode_record = 1;
812 }
813 }
814
815 while (*p != ';' && *p != '\0' && *p != ',')
816 p++;
817 if (*p == ';')
818 p++;
819 }
820 if (*p == ',')
821 p++;
822
823 reply->nb_transports++;
824 }
825 }
826
827 static void handle_rtp_info(RTSPState *rt, const char *url,
828 uint32_t seq, uint32_t rtptime)
829 {
830 int i;
831 if (!rtptime || !url[0])
832 return;
833 if (rt->transport != RTSP_TRANSPORT_RTP)
834 return;
835 for (i = 0; i < rt->nb_rtsp_streams; i++) {
836 RTSPStream *rtsp_st = rt->rtsp_streams[i];
837 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
838 if (!rtpctx)
839 continue;
840 if (!strcmp(rtsp_st->control_url, url)) {
841 rtpctx->base_timestamp = rtptime;
842 break;
843 }
844 }
845 }
846
847 static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
848 {
849 int read = 0;
850 char key[20], value[1024], url[1024] = "";
851 uint32_t seq = 0, rtptime = 0;
852
853 for (;;) {
854 p += strspn(p, SPACE_CHARS);
855 if (!*p)
856 break;
857 get_word_sep(key, sizeof(key), "=", &p);
858 if (*p != '=')
859 break;
860 p++;
861 get_word_sep(value, sizeof(value), ";, ", &p);
862 read++;
863 if (!strcmp(key, "url"))
864 av_strlcpy(url, value, sizeof(url));
865 else if (!strcmp(key, "seq"))
866 seq = strtoul(value, NULL, 10);
867 else if (!strcmp(key, "rtptime"))
868 rtptime = strtoul(value, NULL, 10);
869 if (*p == ',') {
870 handle_rtp_info(rt, url, seq, rtptime);
871 url[0] = '\0';
872 seq = rtptime = 0;
873 read = 0;
874 }
875 if (*p)
876 p++;
877 }
878 if (read > 0)
879 handle_rtp_info(rt, url, seq, rtptime);
880 }
881
882 void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
883 RTSPState *rt, const char *method)
884 {
885 const char *p;
886
887 /* NOTE: we do case independent match for broken servers */
888 p = buf;
889 if (av_stristart(p, "Session:", &p)) {
890 int t;
891 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
892 if (av_stristart(p, ";timeout=", &p) &&
893 (t = strtol(p, NULL, 10)) > 0) {
894 reply->timeout = t;
895 }
896 } else if (av_stristart(p, "Content-Length:", &p)) {
897 reply->content_length = strtol(p, NULL, 10);
898 } else if (av_stristart(p, "Transport:", &p)) {
899 rtsp_parse_transport(reply, p);
900 } else if (av_stristart(p, "CSeq:", &p)) {
901 reply->seq = strtol(p, NULL, 10);
902 } else if (av_stristart(p, "Range:", &p)) {
903 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
904 } else if (av_stristart(p, "RealChallenge1:", &p)) {
905 p += strspn(p, SPACE_CHARS);
906 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
907 } else if (av_stristart(p, "Server:", &p)) {
908 p += strspn(p, SPACE_CHARS);
909 av_strlcpy(reply->server, p, sizeof(reply->server));
910 } else if (av_stristart(p, "Notice:", &p) ||
911 av_stristart(p, "X-Notice:", &p)) {
912 reply->notice = strtol(p, NULL, 10);
913 } else if (av_stristart(p, "Location:", &p)) {
914 p += strspn(p, SPACE_CHARS);
915 av_strlcpy(reply->location, p , sizeof(reply->location));
916 } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
917 p += strspn(p, SPACE_CHARS);
918 ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
919 } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
920 p += strspn(p, SPACE_CHARS);
921 ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
922 } else if (av_stristart(p, "Content-Base:", &p) && rt) {
923 p += strspn(p, SPACE_CHARS);
924 if (method && !strcmp(method, "DESCRIBE"))
925 av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
926 } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
927 p += strspn(p, SPACE_CHARS);
928 if (method && !strcmp(method, "PLAY"))
929 rtsp_parse_rtp_info(rt, p);
930 } else if (av_stristart(p, "Public:", &p) && rt) {
931 if (strstr(p, "GET_PARAMETER") &&
932 method && !strcmp(method, "OPTIONS"))
933 rt->get_parameter_supported = 1;
934 } else if (av_stristart(p, "x-Accept-Dynamic-Rate:", &p) && rt) {
935 p += strspn(p, SPACE_CHARS);
936 rt->accept_dynamic_rate = atoi(p);
937 } else if (av_stristart(p, "Content-Type:", &p)) {
938 p += strspn(p, SPACE_CHARS);
939 av_strlcpy(reply->content_type, p, sizeof(reply->content_type));
940 }
941 }
942
943 /* skip a RTP/TCP interleaved packet */
944 void ff_rtsp_skip_packet(AVFormatContext *s)
945 {
946 RTSPState *rt = s->priv_data;
947 int ret, len, len1;
948 uint8_t buf[1024];
949
950 ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
951 if (ret != 3)
952 return;
953 len = AV_RB16(buf + 1);
954
955 av_dlog(s, "skipping RTP packet len=%d\n", len);
956
957 /* skip payload */
958 while (len > 0) {
959 len1 = len;
960 if (len1 > sizeof(buf))
961 len1 = sizeof(buf);
962 ret = ffurl_read_complete(rt->rtsp_hd, buf, len1);
963 if (ret != len1)
964 return;
965 len -= len1;
966 }
967 }
968
969 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
970 unsigned char **content_ptr,
971 int return_on_interleaved_data, const char *method)
972 {
973 RTSPState *rt = s->priv_data;
974 char buf[4096], buf1[1024], *q;
975 unsigned char ch;
976 const char *p;
977 int ret, content_length, line_count = 0, request = 0;
978 unsigned char *content = NULL;
979
980 start:
981 line_count = 0;
982 request = 0;
983 content = NULL;
984 memset(reply, 0, sizeof(*reply));
985
986 /* parse reply (XXX: use buffers) */
987 rt->last_reply[0] = '\0';
988 for (;;) {
989 q = buf;
990 for (;;) {
991 ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1);
992 av_dlog(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
993 if (ret != 1)
994 return AVERROR_EOF;
995 if (ch == '\n')
996 break;
997 if (ch == '$') {
998 /* XXX: only parse it if first char on line ? */
999 if (return_on_interleaved_data) {
1000 return 1;
1001 } else
1002 ff_rtsp_skip_packet(s);
1003 } else if (ch != '\r') {
1004 if ((q - buf) < sizeof(buf) - 1)
1005 *q++ = ch;
1006 }
1007 }
1008 *q = '\0';
1009
1010 av_dlog(s, "line='%s'\n", buf);
1011
1012 /* test if last line */
1013 if (buf[0] == '\0')
1014 break;
1015 p = buf;
1016 if (line_count == 0) {
1017 /* get reply code */
1018 get_word(buf1, sizeof(buf1), &p);
1019 if (!strncmp(buf1, "RTSP/", 5)) {
1020 get_word(buf1, sizeof(buf1), &p);
1021 reply->status_code = atoi(buf1);
1022 av_strlcpy(reply->reason, p, sizeof(reply->reason));
1023 } else {
1024 av_strlcpy(reply->reason, buf1, sizeof(reply->reason)); // method
1025 get_word(buf1, sizeof(buf1), &p); // object
1026 request = 1;
1027 }
1028 } else {
1029 ff_rtsp_parse_line(reply, p, rt, method);
1030 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
1031 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1032 }
1033 line_count++;
1034 }
1035
1036 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0' && !request)
1037 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
1038
1039 content_length = reply->content_length;
1040 if (content_length > 0) {
1041 /* leave some room for a trailing '\0' (useful for simple parsing) */
1042 content = av_malloc(content_length + 1);
1043 ffurl_read_complete(rt->rtsp_hd, content, content_length);
1044 content[content_length] = '\0';
1045 }
1046 if (content_ptr)
1047 *content_ptr = content;
1048 else
1049 av_free(content);
1050
1051 if (request) {
1052 char buf[1024];
1053 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1054 const char* ptr = buf;
1055
1056 if (!strcmp(reply->reason, "OPTIONS")) {
1057 snprintf(buf, sizeof(buf), "RTSP/1.0 200 OK\r\n");
1058 if (reply->seq)
1059 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", reply->seq);
1060 if (reply->session_id[0])
1061 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n",
1062 reply->session_id);
1063 } else {
1064 snprintf(buf, sizeof(buf), "RTSP/1.0 501 Not Implemented\r\n");
1065 }
1066 av_strlcat(buf, "\r\n", sizeof(buf));
1067
1068 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1069 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1070 ptr = base64buf;
1071 }
1072 ffurl_write(rt->rtsp_hd_out, ptr, strlen(ptr));
1073
1074 rt->last_cmd_time = av_gettime();
1075 /* Even if the request from the server had data, it is not the data
1076 * that the caller wants or expects. The memory could also be leaked
1077 * if the actual following reply has content data. */
1078 if (content_ptr)
1079 av_freep(content_ptr);
1080 /* If method is set, this is called from ff_rtsp_send_cmd,
1081 * where a reply to exactly this request is awaited. For
1082 * callers from within packet receiving, we just want to
1083 * return to the caller and go back to receiving packets. */
1084 if (method)
1085 goto start;
1086 return 0;
1087 }
1088
1089 if (rt->seq != reply->seq) {
1090 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
1091 rt->seq, reply->seq);
1092 }
1093
1094 /* EOS */
1095 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
1096 reply->notice == 2104 /* Start-of-Stream Reached */ ||
1097 reply->notice == 2306 /* Continuous Feed Terminated */) {
1098 rt->state = RTSP_STATE_IDLE;
1099 } else if (reply->notice >= 4400 && reply->notice < 5500) {
1100 return AVERROR(EIO); /* data or server error */
1101 } else if (reply->notice == 2401 /* Ticket Expired */ ||
1102 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
1103 return AVERROR(EPERM);
1104
1105 return 0;
1106 }
1107
1108 /**
1109 * Send a command to the RTSP server without waiting for the reply.
1110 *
1111 * @param s RTSP (de)muxer context
1112 * @param method the method for the request
1113 * @param url the target url for the request
1114 * @param headers extra header lines to include in the request
1115 * @param send_content if non-null, the data to send as request body content
1116 * @param send_content_length the length of the send_content data, or 0 if
1117 * send_content is null
1118 *
1119 * @return zero if success, nonzero otherwise
1120 */
1121 static int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
1122 const char *method, const char *url,
1123 const char *headers,
1124 const unsigned char *send_content,
1125 int send_content_length)
1126 {
1127 RTSPState *rt = s->priv_data;
1128 char buf[4096], *out_buf;
1129 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1130
1131 /* Add in RTSP headers */
1132 out_buf = buf;
1133 rt->seq++;
1134 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
1135 if (headers)
1136 av_strlcat(buf, headers, sizeof(buf));
1137 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
1138 if (rt->session_id[0] != '\0' && (!headers ||
1139 !strstr(headers, "\nIf-Match:"))) {
1140 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
1141 }
1142 if (rt->auth[0]) {
1143 char *str = ff_http_auth_create_response(&rt->auth_state,
1144 rt->auth, url, method);
1145 if (str)
1146 av_strlcat(buf, str, sizeof(buf));
1147 av_free(str);
1148 }
1149 if (send_content_length > 0 && send_content)
1150 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
1151 av_strlcat(buf, "\r\n", sizeof(buf));
1152
1153 /* base64 encode rtsp if tunneling */
1154 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1155 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1156 out_buf = base64buf;
1157 }
1158
1159 av_dlog(s, "Sending:\n%s--\n", buf);
1160
1161 ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
1162 if (send_content_length > 0 && send_content) {
1163 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1164 av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
1165 "with content data not supported\n");
1166 return AVERROR_PATCHWELCOME;
1167 }
1168 ffurl_write(rt->rtsp_hd_out, send_content, send_content_length);
1169 }
1170 rt->last_cmd_time = av_gettime();
1171
1172 return 0;
1173 }
1174
1175 int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1176 const char *url, const char *headers)
1177 {
1178 return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1179 }
1180
1181 int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1182 const char *headers, RTSPMessageHeader *reply,
1183 unsigned char **content_ptr)
1184 {
1185 return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1186 content_ptr, NULL, 0);
1187 }
1188
1189 int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1190 const char *method, const char *url,
1191 const char *header,
1192 RTSPMessageHeader *reply,
1193 unsigned char **content_ptr,
1194 const unsigned char *send_content,
1195 int send_content_length)
1196 {
1197 RTSPState *rt = s->priv_data;
1198 HTTPAuthType cur_auth_type;
1199 int ret, attempts = 0;
1200
1201 retry:
1202 cur_auth_type = rt->auth_state.auth_type;
1203 if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
1204 send_content,
1205 send_content_length)))
1206 return ret;
1207
1208 if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1209 return ret;
1210 attempts++;
1211
1212 if (reply->status_code == 401 &&
1213 (cur_auth_type == HTTP_AUTH_NONE || rt->auth_state.stale) &&
1214 rt->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2)
1215 goto retry;
1216
1217 if (reply->status_code > 400){
1218 av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1219 method,
1220 reply->status_code,
1221 reply->reason);
1222 av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1223 }
1224
1225 return 0;
1226 }
1227
1228 int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1229 int lower_transport, const char *real_challenge)
1230 {
1231 RTSPState *rt = s->priv_data;
1232 int rtx = 0, j, i, err, interleave = 0, port_off;
1233 RTSPStream *rtsp_st;
1234 RTSPMessageHeader reply1, *reply = &reply1;
1235 char cmd[2048];
1236 const char *trans_pref;
1237
1238 if (rt->transport == RTSP_TRANSPORT_RDT)
1239 trans_pref = "x-pn-tng";
1240 else if (rt->transport == RTSP_TRANSPORT_RAW)
1241 trans_pref = "RAW/RAW";
1242 else
1243 trans_pref = "RTP/AVP";
1244
1245 /* default timeout: 1 minute */
1246 rt->timeout = 60;
1247
1248 /* for each stream, make the setup request */
1249 /* XXX: we assume the same server is used for the control of each
1250 * RTSP stream */
1251
1252 /* Choose a random starting offset within the first half of the
1253 * port range, to allow for a number of ports to try even if the offset
1254 * happens to be at the end of the random range. */
1255 port_off = av_get_random_seed() % ((rt->rtp_port_max - rt->rtp_port_min)/2);
1256 /* even random offset */
1257 port_off -= port_off & 0x01;
1258
1259 for (j = rt->rtp_port_min + port_off, i = 0; i < rt->nb_rtsp_streams; ++i) {
1260 char transport[2048];
1261
1262 /*
1263 * WMS serves all UDP data over a single connection, the RTX, which
1264 * isn't necessarily the first in the SDP but has to be the first
1265 * to be set up, else the second/third SETUP will fail with a 461.
1266 */
1267 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1268 rt->server_type == RTSP_SERVER_WMS) {
1269 if (i == 0) {
1270 /* rtx first */
1271 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1272 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1273 if (len >= 4 &&
1274 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1275 "/rtx"))
1276 break;
1277 }
1278 if (rtx == rt->nb_rtsp_streams)
1279 return -1; /* no RTX found */
1280 rtsp_st = rt->rtsp_streams[rtx];
1281 } else
1282 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1283 } else
1284 rtsp_st = rt->rtsp_streams[i];
1285
1286 /* RTP/UDP */
1287 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1288 char buf[256];
1289
1290 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1291 port = reply->transports[0].client_port_min;
1292 goto have_port;
1293 }
1294
1295 /* first try in specified port range */
1296 while (j <= rt->rtp_port_max) {
1297 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1298 "?localport=%d", j);
1299 /* we will use two ports per rtp stream (rtp and rtcp) */
1300 j += 2;
1301 if (!ffurl_open(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE,
1302 &s->interrupt_callback, NULL))
1303 goto rtp_opened;
1304 }
1305
1306 av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1307 err = AVERROR(EIO);
1308 goto fail;
1309
1310 rtp_opened:
1311 port = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1312 have_port:
1313 snprintf(transport, sizeof(transport) - 1,
1314 "%s/UDP;", trans_pref);
1315 if (rt->server_type != RTSP_SERVER_REAL)
1316 av_strlcat(transport, "unicast;", sizeof(transport));
1317 av_strlcatf(transport, sizeof(transport),
1318 "client_port=%d", port);
1319 if (rt->transport == RTSP_TRANSPORT_RTP &&
1320 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1321 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1322 }
1323
1324 /* RTP/TCP */
1325 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1326 /* For WMS streams, the application streams are only used for
1327 * UDP. When trying to set it up for TCP streams, the server
1328 * will return an error. Therefore, we skip those streams. */
1329 if (rt->server_type == RTSP_SERVER_WMS &&
1330 (rtsp_st->stream_index < 0 ||
1331 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1332 AVMEDIA_TYPE_DATA))
1333 continue;
1334 snprintf(transport, sizeof(transport) - 1,
1335 "%s/TCP;", trans_pref);
1336 if (rt->transport != RTSP_TRANSPORT_RDT)
1337 av_strlcat(transport, "unicast;", sizeof(transport));
1338 av_strlcatf(transport, sizeof(transport),
1339 "interleaved=%d-%d",
1340 interleave, interleave + 1);
1341 interleave += 2;
1342 }
1343
1344 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1345 snprintf(transport, sizeof(transport) - 1,
1346 "%s/UDP;multicast", trans_pref);
1347 }
1348 if (s->oformat) {
1349 av_strlcat(transport, ";mode=record", sizeof(transport));
1350 } else if (rt->server_type == RTSP_SERVER_REAL ||
1351 rt->server_type == RTSP_SERVER_WMS)
1352 av_strlcat(transport, ";mode=play", sizeof(transport));
1353 snprintf(cmd, sizeof(cmd),
1354 "Transport: %s\r\n",
1355 transport);
1356 if (rt->accept_dynamic_rate)
1357 av_strlcat(cmd, "x-Dynamic-Rate: 0\r\n", sizeof(cmd));
1358 if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1359 char real_res[41], real_csum[9];
1360 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1361 real_challenge);
1362 av_strlcatf(cmd, sizeof(cmd),
1363 "If-Match: %s\r\n"
1364 "RealChallenge2: %s, sd=%s\r\n",
1365 rt->session_id, real_res, real_csum);
1366 }
1367 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1368 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1369 err = 1;
1370 goto fail;
1371 } else if (reply->status_code != RTSP_STATUS_OK ||
1372 reply->nb_transports != 1) {
1373 err = AVERROR_INVALIDDATA;
1374 goto fail;
1375 }
1376
1377 /* XXX: same protocol for all streams is required */
1378 if (i > 0) {
1379 if (reply->transports[0].lower_transport != rt->lower_transport ||
1380 reply->transports[0].transport != rt->transport) {
1381 err = AVERROR_INVALIDDATA;
1382 goto fail;
1383 }
1384 } else {
1385 rt->lower_transport = reply->transports[0].lower_transport;
1386 rt->transport = reply->transports[0].transport;
1387 }
1388
1389 /* Fail if the server responded with another lower transport mode
1390 * than what we requested. */
1391 if (reply->transports[0].lower_transport != lower_transport) {
1392 av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1393 err = AVERROR_INVALIDDATA;
1394 goto fail;
1395 }
1396
1397 switch(reply->transports[0].lower_transport) {
1398 case RTSP_LOWER_TRANSPORT_TCP:
1399 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1400 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1401 break;
1402
1403 case RTSP_LOWER_TRANSPORT_UDP: {
1404 char url[1024], options[30] = "";
1405
1406 if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC)
1407 av_strlcpy(options, "?connect=1", sizeof(options));
1408 /* Use source address if specified */
1409 if (reply->transports[0].source[0]) {
1410 ff_url_join(url, sizeof(url), "rtp", NULL,
1411 reply->transports[0].source,
1412 reply->transports[0].server_port_min, "%s", options);
1413 } else {
1414 ff_url_join(url, sizeof(url), "rtp", NULL, host,
1415 reply->transports[0].server_port_min, "%s", options);
1416 }
1417 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1418 ff_rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1419 err = AVERROR_INVALIDDATA;
1420 goto fail;
1421 }
1422 /* Try to initialize the connection state in a
1423 * potential NAT router by sending dummy packets.
1424 * RTP/RTCP dummy packets are used for RDT, too.
1425 */
1426 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1427 CONFIG_RTPDEC)
1428 ff_rtp_send_punch_packets(rtsp_st->rtp_handle);
1429 break;
1430 }
1431 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1432 char url[1024], namebuf[50], optbuf[20] = "";
1433 struct sockaddr_storage addr;
1434 int port, ttl;
1435
1436 if (reply->transports[0].destination.ss_family) {
1437 addr = reply->transports[0].destination;
1438 port = reply->transports[0].port_min;
1439 ttl = reply->transports[0].ttl;
1440 } else {
1441 addr = rtsp_st->sdp_ip;
1442 port = rtsp_st->sdp_port;
1443 ttl = rtsp_st->sdp_ttl;
1444 }
1445 if (ttl > 0)
1446 snprintf(optbuf, sizeof(optbuf), "?ttl=%d", ttl);
1447 getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1448 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1449 ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1450 port, "%s", optbuf);
1451 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
1452 &s->interrupt_callback, NULL) < 0) {
1453 err = AVERROR_INVALIDDATA;
1454 goto fail;
1455 }
1456 break;
1457 }
1458 }
1459
1460 if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
1461 goto fail;
1462 }
1463
1464 if (rt->nb_rtsp_streams && reply->timeout > 0)
1465 rt->timeout = reply->timeout;
1466
1467 if (rt->server_type == RTSP_SERVER_REAL)
1468 rt->need_subscription = 1;
1469
1470 return 0;
1471
1472 fail:
1473 ff_rtsp_undo_setup(s);
1474 return err;
1475 }
1476
1477 void ff_rtsp_close_connections(AVFormatContext *s)
1478 {
1479 RTSPState *rt = s->priv_data;
1480 if (rt->rtsp_hd_out != rt->rtsp_hd) ffurl_close(rt->rtsp_hd_out);
1481 ffurl_close(rt->rtsp_hd);
1482 rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1483 }
1484
1485 int ff_rtsp_connect(AVFormatContext *s)
1486 {
1487 RTSPState *rt = s->priv_data;
1488 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1489 int port, err, tcp_fd;
1490 RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1491 int lower_transport_mask = 0;
1492 char real_challenge[64] = "";
1493 struct sockaddr_storage peer;
1494 socklen_t peer_len = sizeof(peer);
1495
1496 if (rt->rtp_port_max < rt->rtp_port_min) {
1497 av_log(s, AV_LOG_ERROR, "Invalid UDP port range, max port %d less "
1498 "than min port %d\n", rt->rtp_port_max,
1499 rt->rtp_port_min);
1500 return AVERROR(EINVAL);
1501 }
1502
1503 if (!ff_network_init())
1504 return AVERROR(EIO);
1505
1506 if (s->max_delay < 0) /* Not set by the caller */
1507 s->max_delay = s->iformat ? DEFAULT_REORDERING_DELAY : 0;
1508
1509 rt->control_transport = RTSP_MODE_PLAIN;
1510 if (rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_HTTP)) {
1511 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1512 rt->control_transport = RTSP_MODE_TUNNEL;
1513 }
1514 /* Only pass through valid flags from here */
1515 rt->lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1516
1517 redirect:
1518 lower_transport_mask = rt->lower_transport_mask;
1519 /* extract hostname and port */
1520 av_url_split(NULL, 0, auth, sizeof(auth),
1521 host, sizeof(host), &port, path, sizeof(path), s->filename);
1522 if (*auth) {
1523 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1524 }
1525 if (port < 0)
1526 port = RTSP_DEFAULT_PORT;
1527
1528 if (!lower_transport_mask)
1529 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1530
1531 if (s->oformat) {
1532 /* Only UDP or TCP - UDP multicast isn't supported. */
1533 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1534 (1 << RTSP_LOWER_TRANSPORT_TCP);
1535 if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1536 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1537 "only UDP and TCP are supported for output.\n");
1538 err = AVERROR(EINVAL);
1539 goto fail;
1540 }
1541 }
1542
1543 /* Construct the URI used in request; this is similar to s->filename,
1544 * but with authentication credentials removed and RTSP specific options
1545 * stripped out. */
1546 ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1547 host, port, "%s", path);
1548
1549 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1550 /* set up initial handshake for tunneling */
1551 char httpname[1024];
1552 char sessioncookie[17];
1553 char headers[1024];
1554
1555 ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1556 snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1557 av_get_random_seed(), av_get_random_seed());
1558
1559 /* GET requests */
1560 if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ,
1561 &s->interrupt_callback) < 0) {
1562 err = AVERROR(EIO);
1563 goto fail;
1564 }
1565
1566 /* generate GET headers */
1567 snprintf(headers, sizeof(headers),
1568 "x-sessioncookie: %s\r\n"
1569 "Accept: application/x-rtsp-tunnelled\r\n"
1570 "Pragma: no-cache\r\n"
1571 "Cache-Control: no-cache\r\n",
1572 sessioncookie);
1573 av_opt_set(rt->rtsp_hd->priv_data, "headers", headers, 0);
1574
1575 /* complete the connection */
1576 if (ffurl_connect(rt->rtsp_hd, NULL)) {
1577 err = AVERROR(EIO);
1578 goto fail;
1579 }
1580
1581 /* POST requests */
1582 if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE,
1583 &s->interrupt_callback) < 0 ) {
1584 err = AVERROR(EIO);
1585 goto fail;
1586 }
1587
1588 /* generate POST headers */
1589 snprintf(headers, sizeof(headers),
1590 "x-sessioncookie: %s\r\n"
1591 "Content-Type: application/x-rtsp-tunnelled\r\n"
1592 "Pragma: no-cache\r\n"
1593 "Cache-Control: no-cache\r\n"
1594 "Content-Length: 32767\r\n"
1595 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1596 sessioncookie);
1597 av_opt_set(rt->rtsp_hd_out->priv_data, "headers", headers, 0);
1598 av_opt_set(rt->rtsp_hd_out->priv_data, "chunked_post", "0", 0);
1599
1600 /* Initialize the authentication state for the POST session. The HTTP
1601 * protocol implementation doesn't properly handle multi-pass
1602 * authentication for POST requests, since it would require one of
1603 * the following:
1604 * - implementing Expect: 100-continue, which many HTTP servers
1605 * don't support anyway, even less the RTSP servers that do HTTP
1606 * tunneling
1607 * - sending the whole POST data until getting a 401 reply specifying
1608 * what authentication method to use, then resending all that data
1609 * - waiting for potential 401 replies directly after sending the
1610 * POST header (waiting for some unspecified time)
1611 * Therefore, we copy the full auth state, which works for both basic
1612 * and digest. (For digest, we would have to synchronize the nonce
1613 * count variable between the two sessions, if we'd do more requests
1614 * with the original session, though.)
1615 */
1616 ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1617
1618 /* complete the connection */
1619 if (ffurl_connect(rt->rtsp_hd_out, NULL)) {
1620 err = AVERROR(EIO);
1621 goto fail;
1622 }
1623 } else {
1624 /* open the tcp connection */
1625 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1626 if (ffurl_open(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
1627 &s->interrupt_callback, NULL) < 0) {
1628 err = AVERROR(EIO);
1629 goto fail;
1630 }
1631 rt->rtsp_hd_out = rt->rtsp_hd;
1632 }
1633 rt->seq = 0;
1634
1635 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1636 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1637 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1638 NULL, 0, NI_NUMERICHOST);
1639 }
1640
1641 /* request options supported by the server; this also detects server
1642 * type */
1643 for (rt->server_type = RTSP_SERVER_RTP;;) {
1644 cmd[0] = 0;
1645 if (rt->server_type == RTSP_SERVER_REAL)
1646 av_strlcat(cmd,
1647 /*
1648 * The following entries are required for proper
1649 * streaming from a Realmedia server. They are
1650 * interdependent in some way although we currently
1651 * don't quite understand how. Values were copied
1652 * from mplayer SVN r23589.
1653 * ClientChallenge is a 16-byte ID in hex
1654 * CompanyID is a 16-byte ID in base64
1655 */
1656 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1657 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1658 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1659 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1660 sizeof(cmd));
1661 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1662 if (reply->status_code != RTSP_STATUS_OK) {
1663 err = AVERROR_INVALIDDATA;
1664 goto fail;
1665 }
1666
1667 /* detect server type if not standard-compliant RTP */
1668 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1669 rt->server_type = RTSP_SERVER_REAL;
1670 continue;
1671 } else if (!av_strncasecmp(reply->server, "WMServer/", 9)) {
1672 rt->server_type = RTSP_SERVER_WMS;
1673 } else if (rt->server_type == RTSP_SERVER_REAL)
1674 strcpy(real_challenge, reply->real_challenge);
1675 break;
1676 }
1677
1678 if (s->iformat && CONFIG_RTSP_DEMUXER)
1679 err = ff_rtsp_setup_input_streams(s, reply);
1680 else if (CONFIG_RTSP_MUXER)
1681 err = ff_rtsp_setup_output_streams(s, host);
1682 if (err)
1683 goto fail;
1684
1685 do {
1686 int lower_transport = ff_log2_tab[lower_transport_mask &
1687 ~(lower_transport_mask - 1)];
1688
1689 err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1690 rt->server_type == RTSP_SERVER_REAL ?
1691 real_challenge : NULL);
1692 if (err < 0)
1693 goto fail;
1694 lower_transport_mask &= ~(1 << lower_transport);
1695 if (lower_transport_mask == 0 && err == 1) {
1696 err = AVERROR(EPROTONOSUPPORT);
1697 goto fail;
1698 }
1699 } while (err);
1700
1701 rt->lower_transport_mask = lower_transport_mask;
1702 av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1703 rt->state = RTSP_STATE_IDLE;
1704 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1705 return 0;
1706 fail:
1707 ff_rtsp_close_streams(s);
1708 ff_rtsp_close_connections(s);
1709 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1710 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1711 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1712 reply->status_code,
1713 s->filename);
1714 goto redirect;
1715 }
1716 ff_network_close();
1717 return err;
1718 }
1719 #endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1720
1721 #if CONFIG_RTPDEC
1722 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1723 uint8_t *buf, int buf_size, int64_t wait_end)
1724 {
1725 RTSPState *rt = s->priv_data;
1726 RTSPStream *rtsp_st;
1727 int n, i, ret, tcp_fd, timeout_cnt = 0;
1728 int max_p = 0;
1729 struct pollfd *p = rt->p;
1730 int *fds = NULL, fdsnum, fdsidx;
1731
1732 for (;;) {
1733 if (ff_check_interrupt(&s->interrupt_callback))
1734 return AVERROR_EXIT;
1735 if (wait_end && wait_end - av_gettime() < 0)
1736 return AVERROR(EAGAIN);
1737 max_p = 0;
1738 if (rt->rtsp_hd) {
1739 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1740 p[max_p].fd = tcp_fd;
1741 p[max_p++].events = POLLIN;
1742 } else {
1743 tcp_fd = -1;
1744 }
1745 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1746 rtsp_st = rt->rtsp_streams[i];
1747 if (rtsp_st->rtp_handle) {
1748 if (ret = ffurl_get_multi_file_handle(rtsp_st->rtp_handle,
1749 &fds, &fdsnum)) {
1750 av_log(s, AV_LOG_ERROR, "Unable to recover rtp ports\n");
1751 return ret;
1752 }
1753 if (fdsnum != 2) {
1754 av_log(s, AV_LOG_ERROR,
1755 "Number of fds %d not supported\n", fdsnum);
1756 return AVERROR_INVALIDDATA;
1757 }
1758 for (fdsidx = 0; fdsidx < fdsnum; fdsidx++) {
1759 p[max_p].fd = fds[fdsidx];
1760 p[max_p++].events = POLLIN;
1761 }
1762 av_free(fds);
1763 }
1764 }
1765 n = poll(p, max_p, POLL_TIMEOUT_MS);
1766 if (n > 0) {
1767 int j = 1 - (tcp_fd == -1);
1768 timeout_cnt = 0;
1769 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1770 rtsp_st = rt->rtsp_streams[i];
1771 if (rtsp_st->rtp_handle) {
1772 if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
1773 ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size);
1774 if (ret > 0) {
1775 *prtsp_st = rtsp_st;
1776 return ret;
1777 }
1778 }
1779 j+=2;
1780 }
1781 }
1782 #if CONFIG_RTSP_DEMUXER
1783 if (tcp_fd != -1 && p[0].revents & POLLIN) {
1784 if (rt->rtsp_flags & RTSP_FLAG_LISTEN) {
1785 if (rt->state == RTSP_STATE_STREAMING) {
1786 if (!ff_rtsp_parse_streaming_commands(s))
1787 return AVERROR_EOF;
1788 else
1789 av_log(s, AV_LOG_WARNING,
1790 "Unable to answer to TEARDOWN\n");
1791 } else
1792 return 0;
1793 } else {
1794 RTSPMessageHeader reply;
1795 ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1796 if (ret < 0)
1797 return ret;
1798 /* XXX: parse message */
1799 if (rt->state != RTSP_STATE_STREAMING)
1800 return 0;
1801 }
1802 }
1803 #endif
1804 } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1805 return AVERROR(ETIMEDOUT);
1806 } else if (n < 0 && errno != EINTR)
1807 return AVERROR(errno);
1808 }
1809 }
1810
1811 static int pick_stream(AVFormatContext *s, RTSPStream **rtsp_st,
1812 const uint8_t *buf, int len)
1813 {
1814 RTSPState *rt = s->priv_data;
1815 int i;
1816 if (len < 0)
1817 return len;
1818 if (rt->nb_rtsp_streams == 1) {
1819 *rtsp_st = rt->rtsp_streams[0];
1820 return len;
1821 }
1822 if (len >= 8 && rt->transport == RTSP_TRANSPORT_RTP) {
1823 if (RTP_PT_IS_RTCP(rt->recvbuf[1])) {
1824 int no_ssrc = 0;
1825 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1826 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1827 if (!rtpctx)
1828 continue;
1829 if (rtpctx->ssrc == AV_RB32(&buf[4])) {
1830 *rtsp_st = rt->rtsp_streams[i];
1831 return len;
1832 }
1833 if (!rtpctx->ssrc)
1834 no_ssrc = 1;
1835 }
1836 if (no_ssrc) {
1837 av_log(s, AV_LOG_WARNING,
1838 "Unable to pick stream for packet - SSRC not known for "
1839 "all streams\n");
1840 return AVERROR(EAGAIN);
1841 }
1842 } else {
1843 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1844 if ((buf[1] & 0x7f) == rt->rtsp_streams[i]->sdp_payload_type) {
1845 *rtsp_st = rt->rtsp_streams[i];
1846 return len;
1847 }
1848 }
1849 }
1850 }
1851 av_log(s, AV_LOG_WARNING, "Unable to pick stream for packet\n");
1852 return AVERROR(EAGAIN);
1853 }
1854
1855 int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1856 {
1857 RTSPState *rt = s->priv_data;
1858 int ret, len;
1859 RTSPStream *rtsp_st, *first_queue_st = NULL;
1860 int64_t wait_end = 0;
1861
1862 if (rt->nb_byes == rt->nb_rtsp_streams)
1863 return AVERROR_EOF;
1864
1865 /* get next frames from the same RTP packet */
1866 if (rt->cur_transport_priv) {
1867 if (rt->transport == RTSP_TRANSPORT_RDT) {
1868 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1869 } else if (rt->transport == RTSP_TRANSPORT_RTP) {
1870 ret = ff_rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1871 } else if (rt->ts && CONFIG_RTPDEC) {
1872 ret = ff_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf + rt->recvbuf_pos, rt->recvbuf_len - rt->recvbuf_pos);
1873 if (ret >= 0) {
1874 rt->recvbuf_pos += ret;
1875 ret = rt->recvbuf_pos < rt->recvbuf_len;
1876 }
1877 } else
1878 ret = -1;
1879 if (ret == 0) {
1880 rt->cur_transport_priv = NULL;
1881 return 0;
1882 } else if (ret == 1) {
1883 return 0;
1884 } else
1885 rt->cur_transport_priv = NULL;
1886 }
1887
1888 redo:
1889 if (rt->transport == RTSP_TRANSPORT_RTP) {
1890 int i;
1891 int64_t first_queue_time = 0;
1892 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1893 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1894 int64_t queue_time;
1895 if (!rtpctx)
1896 continue;
1897 queue_time = ff_rtp_queued_packet_time(rtpctx);
1898 if (queue_time && (queue_time - first_queue_time < 0 ||
1899 !first_queue_time)) {
1900 first_queue_time = queue_time;
1901 first_queue_st = rt->rtsp_streams[i];
1902 }
1903 }
1904 if (first_queue_time) {
1905 wait_end = first_queue_time + s->max_delay;
1906 } else {
1907 wait_end = 0;
1908 first_queue_st = NULL;
1909 }
1910 }
1911
1912 /* read next RTP packet */
1913 if (!rt->recvbuf) {
1914 rt->recvbuf = av_malloc(RECVBUF_SIZE);
1915 if (!rt->recvbuf)
1916 return AVERROR(ENOMEM);
1917 }
1918
1919 switch(rt->lower_transport) {
1920 default:
1921 #if CONFIG_RTSP_DEMUXER
1922 case RTSP_LOWER_TRANSPORT_TCP:
1923 len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
1924 break;
1925 #endif
1926 case RTSP_LOWER_TRANSPORT_UDP:
1927 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1928 len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
1929 if (len > 0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1930 ff_rtp_check_and_send_back_rr(rtsp_st->transport_priv, rtsp_st->rtp_handle, NULL, len);
1931 break;
1932 case RTSP_LOWER_TRANSPORT_CUSTOM:
1933 if (first_queue_st && rt->transport == RTSP_TRANSPORT_RTP &&
1934 wait_end && wait_end < av_gettime())
1935 len = AVERROR(EAGAIN);
1936 else
1937 len = ffio_read_partial(s->pb, rt->recvbuf, RECVBUF_SIZE);
1938 len = pick_stream(s, &rtsp_st, rt->recvbuf, len);
1939 if (len > 0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1940 ff_rtp_check_and_send_back_rr(rtsp_st->transport_priv, NULL, s->pb, len);
1941 break;
1942 }
1943 if (len == AVERROR(EAGAIN) && first_queue_st &&
1944 rt->transport == RTSP_TRANSPORT_RTP) {
1945 rtsp_st = first_queue_st;
1946 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
1947 goto end;
1948 }
1949 if (len < 0)
1950 return len;
1951 if (len == 0)
1952 return AVERROR_EOF;
1953 if (rt->transport == RTSP_TRANSPORT_RDT) {
1954 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1955 } else if (rt->transport == RTSP_TRANSPORT_RTP) {
1956 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1957 if (rtsp_st->feedback) {
1958 AVIOContext *pb = NULL;
1959 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_CUSTOM)
1960 pb = s->pb;
1961 ff_rtp_send_rtcp_feedback(rtsp_st->transport_priv, rtsp_st->rtp_handle, pb);
1962 }
1963 if (ret < 0) {
1964 /* Either bad packet, or a RTCP packet. Check if the
1965 * first_rtcp_ntp_time field was initialized. */
1966 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1967 if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1968 /* first_rtcp_ntp_time has been initialized for this stream,
1969 * copy the same value to all other uninitialized streams,
1970 * in order to map their timestamp origin to the same ntp time
1971 * as this one. */
1972 int i;
1973 AVStream *st = NULL;
1974 if (rtsp_st->stream_index >= 0)
1975 st = s->streams[rtsp_st->stream_index];
1976 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1977 RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
1978 AVStream *st2 = NULL;
1979 if (rt->rtsp_streams[i]->stream_index >= 0)
1980 st2 = s->streams[rt->rtsp_streams[i]->stream_index];
1981 if (rtpctx2 && st && st2 &&
1982 rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
1983 rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1984 rtpctx2->rtcp_ts_offset = av_rescale_q(
1985 rtpctx->rtcp_ts_offset, st->time_base,
1986 st2->time_base);
1987 }
1988 }
1989 }
1990 if (ret == -RTCP_BYE) {
1991 rt->nb_byes++;
1992
1993 av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1994 rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1995
1996 if (rt->nb_byes == rt->nb_rtsp_streams)
1997 return AVERROR_EOF;
1998 }
1999 }
2000 } else if (rt->ts && CONFIG_RTPDEC) {
2001 ret = ff_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf, len);
2002 if (ret >= 0) {
2003 if (ret < len) {
2004 rt->recvbuf_len = len;
2005 rt->recvbuf_pos = ret;
2006 rt->cur_transport_priv = rt->ts;
2007 return 1;
2008 } else {
2009 ret = 0;
2010 }
2011 }
2012 } else {
2013 return AVERROR_INVALIDDATA;
2014 }
2015 end:
2016 if (ret < 0)
2017 goto redo;
2018 if (ret == 1)
2019 /* more packets may follow, so we save the RTP context */
2020 rt->cur_transport_priv = rtsp_st->transport_priv;
2021
2022 return ret;
2023 }
2024 #endif /* CONFIG_RTPDEC */
2025
2026 #if CONFIG_SDP_DEMUXER
2027 static int sdp_probe(AVProbeData *p1)
2028 {
2029 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
2030
2031 /* we look for a line beginning "c=IN IP" */
2032 while (p < p_end && *p != '\0') {
2033 if (p + sizeof("c=IN IP") - 1 < p_end &&
2034 av_strstart(p, "c=IN IP", NULL))
2035 return AVPROBE_SCORE_MAX / 2;
2036
2037 while (p < p_end - 1 && *p != '\n') p++;
2038 if (++p >= p_end)
2039 break;
2040 if (*p == '\r')
2041 p++;
2042 }
2043 return 0;
2044 }
2045
2046 static int sdp_read_header(AVFormatContext *s)
2047 {
2048 RTSPState *rt = s->priv_data;
2049 RTSPStream *rtsp_st;
2050 int size, i, err;
2051 char *content;
2052 char url[1024];
2053
2054 if (!ff_network_init())
2055 return AVERROR(EIO);
2056
2057 if (s->max_delay < 0) /* Not set by the caller */
2058 s->max_delay = DEFAULT_REORDERING_DELAY;
2059 if (rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)
2060 rt->lower_transport = RTSP_LOWER_TRANSPORT_CUSTOM;
2061
2062 /* read the whole sdp file */
2063 /* XXX: better loading */
2064 content = av_malloc(SDP_MAX_SIZE);
2065 size = avio_read(s->pb, content, SDP_MAX_SIZE - 1);
2066 if (size <= 0) {
2067 av_free(content);
2068 return AVERROR_INVALIDDATA;
2069 }
2070 content[size] ='\0';
2071
2072 err = ff_sdp_parse(s, content);
2073 av_free(content);
2074 if (err) goto fail;
2075
2076 /* open each RTP stream */
2077 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2078 char namebuf[50];
2079 rtsp_st = rt->rtsp_streams[i];
2080
2081 if (!(rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)) {
2082 getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
2083 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
2084 ff_url_join(url, sizeof(url), "rtp", NULL,
2085 namebuf, rtsp_st->sdp_port,
2086 "?localport=%d&ttl=%d&connect=%d", rtsp_st->sdp_port,
2087 rtsp_st->sdp_ttl,
2088 rt->rtsp_flags & RTSP_FLAG_FILTER_SRC ? 1 : 0);
2089 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
2090 &s->interrupt_callback, NULL) < 0) {
2091 err = AVERROR_INVALIDDATA;
2092 goto fail;
2093 }
2094 }
2095 if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
2096 goto fail;
2097 }
2098 return 0;
2099 fail:
2100 ff_rtsp_close_streams(s);
2101 ff_network_close();
2102 return err;
2103 }
2104
2105 static int sdp_read_close(AVFormatContext *s)
2106 {
2107 ff_rtsp_close_streams(s);
2108 ff_network_close();
2109 return 0;
2110 }
2111
2112 static const AVClass sdp_demuxer_class = {
2113 .class_name = "SDP demuxer",
2114 .item_name = av_default_item_name,
2115 .option = sdp_options,
2116 .version = LIBAVUTIL_VERSION_INT,
2117 };
2118
2119 AVInputFormat ff_sdp_demuxer = {
2120 .name = "sdp",
2121 .long_name = NULL_IF_CONFIG_SMALL("SDP"),
2122 .priv_data_size = sizeof(RTSPState),
2123 .read_probe = sdp_probe,
2124 .read_header = sdp_read_header,
2125 .read_packet = ff_rtsp_fetch_packet,
2126 .read_close = sdp_read_close,
2127 .priv_class = &sdp_demuxer_class,
2128 };
2129 #endif /* CONFIG_SDP_DEMUXER */
2130
2131 #if CONFIG_RTP_DEMUXER
2132 static int rtp_probe(AVProbeData *p)
2133 {
2134 if (av_strstart(p->filename, "rtp:", NULL))
2135 return AVPROBE_SCORE_MAX;
2136 return 0;
2137 }
2138
2139 static int rtp_read_header(AVFormatContext *s)
2140 {
2141 uint8_t recvbuf[1500];
2142 char host[500], sdp[500];
2143 int ret, port;
2144 URLContext* in = NULL;
2145 int payload_type;
2146 AVCodecContext codec = { 0 };
2147 struct sockaddr_storage addr;
2148 AVIOContext pb;
2149 socklen_t addrlen = sizeof(addr);
2150 RTSPState *rt = s->priv_data;
2151
2152 if (!ff_network_init())
2153 return AVERROR(EIO);
2154
2155 ret = ffurl_open(&in, s->filename, AVIO_FLAG_READ,
2156 &s->interrupt_callback, NULL);
2157 if (ret)
2158 goto fail;
2159
2160 while (1) {
2161 ret = ffurl_read(in, recvbuf, sizeof(recvbuf));
2162 if (ret == AVERROR(EAGAIN))
2163 continue;
2164 if (ret < 0)
2165 goto fail;
2166 if (ret < 12) {
2167 av_log(s, AV_LOG_WARNING, "Received too short packet\n");
2168 continue;
2169 }
2170
2171 if ((recvbuf[0] & 0xc0) != 0x80) {
2172 av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
2173 "received\n");
2174 continue;
2175 }
2176
2177 if (RTP_PT_IS_RTCP(recvbuf[1]))
2178 continue;
2179
2180 payload_type = recvbuf[1] & 0x7f;
2181 break;
2182 }
2183 getsockname(ffurl_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
2184 ffurl_close(in);
2185 in = NULL;
2186
2187 if (ff_rtp_get_codec_info(&codec, payload_type)) {
2188 av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
2189 "without an SDP file describing it\n",
2190 payload_type);
2191 goto fail;
2192 }
2193 if (codec.codec_type != AVMEDIA_TYPE_DATA) {
2194 av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
2195 "properly you need an SDP file "
2196 "describing it\n");
2197 }
2198
2199 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
2200 NULL, 0, s->filename);
2201
2202 snprintf(sdp, sizeof(sdp),
2203 "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
2204 addr.ss_family == AF_INET ? 4 : 6, host,
2205 codec.codec_type == AVMEDIA_TYPE_DATA ? "application" :
2206 codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
2207 port, payload_type);
2208 av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
2209
2210 ffio_init_context(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
2211 s->pb = &pb;
2212
2213 /* sdp_read_header initializes this again */
2214 ff_network_close();
2215
2216 rt->media_type_mask = (1 << (AVMEDIA_TYPE_DATA+1)) - 1;
2217
2218 ret = sdp_read_header(s);
2219 s->pb = NULL;
2220 return ret;
2221
2222 fail:
2223 if (in)
2224 ffurl_close(in);
2225 ff_network_close();
2226 return ret;
2227 }
2228
2229 static const AVClass rtp_demuxer_class = {
2230 .class_name = "RTP demuxer",
2231 .item_name = av_default_item_name,
2232 .option = rtp_options,
2233 .version = LIBAVUTIL_VERSION_INT,
2234 };
2235
2236 AVInputFormat ff_rtp_demuxer = {
2237 .name = "rtp",
2238 .long_name = NULL_IF_CONFIG_SMALL("RTP input"),
2239 .priv_data_size = sizeof(RTSPState),
2240 .read_probe = rtp_probe,
2241 .read_header = rtp_read_header,
2242 .read_packet = ff_rtsp_fetch_packet,
2243 .read_close = sdp_read_close,
2244 .flags = AVFMT_NOFILE,
2245 .priv_class = &rtp_demuxer_class,
2246 };
2247 #endif /* CONFIG_RTP_DEMUXER */
A couple of patches to make building with MPlayer easier