rtsp: Remove a leftover, currently pointless check
[libav.git] / libavformat / rtsp.c
CommitLineData
1617ad97 1/*
93ced3e8 2 * RTSP/SDP client
406792e7 3 * Copyright (c) 2002 Fabrice Bellard
1617ad97 4 *
2912e87a 5 * This file is part of Libav.
b78e7197 6 *
2912e87a 7 * Libav is free software; you can redistribute it and/or
1617ad97
FB
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
1617ad97 11 *
2912e87a 12 * Libav is distributed in the hope that it will be useful,
1617ad97
FB
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
2912e87a 18 * License along with Libav; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
1617ad97 20 */
245976da 21
f9337897 22#include "libavutil/base64.h"
245976da 23#include "libavutil/avstring.h"
6a5d31ac 24#include "libavutil/intreadwrite.h"
0ebcdf5c 25#include "libavutil/mathematics.h"
9fcae973 26#include "libavutil/parseutils.h"
f5d33f52 27#include "libavutil/random_seed.h"
d2d67e42 28#include "libavutil/dict.h"
d450cc4f 29#include "libavutil/opt.h"
1617ad97 30#include "avformat.h"
e731b8d8 31#include "avio_internal.h"
1617ad97 32
db0ed93e 33#include <sys/time.h>
a8475bbd
LB
34#if HAVE_POLL_H
35#include <poll.h>
6ad1c9c9 36#endif
e4a9e3cc 37#include "internal.h"
42572ef5 38#include "network.h"
cbfa66d0 39#include "os_support.h"
f5d33f52 40#include "http.h"
c971ff19 41#include "rtsp.h"
1617ad97 42
302879cb 43#include "rtpdec.h"
e9dea59f 44#include "rdt.h"
965a3ddb 45#include "rtpdec_formats.h"
a493f80a 46#include "rtpenc_chain.h"
5652bb94 47#include "url.h"
17fff881 48#include "rtpenc.h"
4934884a 49
1617ad97
FB
50//#define DEBUG
51
a8475bbd 52/* Timeout values for socket poll, in ms,
9cba6f5f 53 * and read_packet(), in seconds */
a8475bbd 54#define POLL_TIMEOUT_MS 100
9cba6f5f 55#define READ_PACKET_TIMEOUT_S 10
a8475bbd 56#define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / POLL_TIMEOUT_MS
91af5601 57#define SDP_MAX_SIZE 16384
96a7c975 58#define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
9cba6f5f 59
2c9aa024
MS
60#define OFFSET(x) offsetof(RTSPState, x)
61#define DEC AV_OPT_FLAG_DECODING_PARAM
eca4850c 62#define ENC AV_OPT_FLAG_ENCODING_PARAM
3a6765fb
MS
63
64#define RTSP_FLAG_OPTS(name, longname) \
65 { name, longname, OFFSET(rtsp_flags), AV_OPT_TYPE_FLAGS, {0}, INT_MIN, INT_MAX, DEC, "rtsp_flags" }, \
66 { "filter_src", "Only receive packets from the negotiated peer IP", 0, AV_OPT_TYPE_CONST, {RTSP_FLAG_FILTER_SRC}, 0, 0, DEC, "rtsp_flags" }
67
f011fcd6
JB
68#define RTSP_MEDIATYPE_OPTS(name, longname) \
69 { name, longname, OFFSET(media_type_mask), AV_OPT_TYPE_FLAGS, { (1 << (AVMEDIA_TYPE_DATA+1)) - 1 }, INT_MIN, INT_MAX, DEC, "allowed_media_types" }, \
70 { "video", "Video", 0, AV_OPT_TYPE_CONST, {1 << AVMEDIA_TYPE_VIDEO}, 0, 0, DEC, "allowed_media_types" }, \
71 { "audio", "Audio", 0, AV_OPT_TYPE_CONST, {1 << AVMEDIA_TYPE_AUDIO}, 0, 0, DEC, "allowed_media_types" }, \
72 { "data", "Data", 0, AV_OPT_TYPE_CONST, {1 << AVMEDIA_TYPE_DATA}, 0, 0, DEC, "allowed_media_types" }
73
17fff881 74const AVOption ff_rtsp_options[] = {
2c9aa024 75 { "initial_pause", "Don't start playing the stream immediately", OFFSET(initial_pause), AV_OPT_TYPE_INT, {0}, 0, 1, DEC },
17fff881 76 FF_RTP_FLAG_OPTS(RTSPState, rtp_muxer_flags),
eca4850c
MS
77 { "rtsp_transport", "RTSP transport protocols", OFFSET(lower_transport_mask), AV_OPT_TYPE_FLAGS, {0}, INT_MIN, INT_MAX, DEC|ENC, "rtsp_transport" }, \
78 { "udp", "UDP", 0, AV_OPT_TYPE_CONST, {1 << RTSP_LOWER_TRANSPORT_UDP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
79 { "tcp", "TCP", 0, AV_OPT_TYPE_CONST, {1 << RTSP_LOWER_TRANSPORT_TCP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
80 { "udp_multicast", "UDP multicast", 0, AV_OPT_TYPE_CONST, {1 << RTSP_LOWER_TRANSPORT_UDP_MULTICAST}, 0, 0, DEC, "rtsp_transport" },
81 { "http", "HTTP tunneling", 0, AV_OPT_TYPE_CONST, {(1 << RTSP_LOWER_TRANSPORT_HTTP)}, 0, 0, DEC, "rtsp_transport" },
3a6765fb 82 RTSP_FLAG_OPTS("rtsp_flags", "RTSP flags"),
f011fcd6 83 RTSP_MEDIATYPE_OPTS("allowed_media_types", "Media types to accept from the server"),
17fff881
MS
84 { NULL },
85};
86
51369f28
MS
87static const AVOption sdp_options[] = {
88 RTSP_FLAG_OPTS("sdp_flags", "SDP flags"),
f011fcd6 89 RTSP_MEDIATYPE_OPTS("allowed_media_types", "Media types to accept from the server"),
51369f28
MS
90 { NULL },
91};
92
93static const AVOption rtp_options[] = {
94 RTSP_FLAG_OPTS("rtp_flags", "RTP flags"),
95 { NULL },
96};
97
1ef36a70
RB
98static void get_word_until_chars(char *buf, int buf_size,
99 const char *sep, const char **pp)
1617ad97
FB
100{
101 const char *p;
102 char *q;
103
104 p = *pp;
30619e6e 105 p += strspn(p, SPACE_CHARS);
1617ad97
FB
106 q = buf;
107 while (!strchr(sep, *p) && *p != '\0') {
108 if ((q - buf) < buf_size - 1)
109 *q++ = *p;
110 p++;
111 }
112 if (buf_size > 0)
113 *q = '\0';
114 *pp = p;
115}
116
1ef36a70
RB
117static void get_word_sep(char *buf, int buf_size, const char *sep,
118 const char **pp)
1617ad97 119{
1ef36a70
RB
120 if (**pp == '/') (*pp)++;
121 get_word_until_chars(buf, buf_size, sep, pp);
122}
1617ad97 123
1ef36a70
RB
124static void get_word(char *buf, int buf_size, const char **pp)
125{
126 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
1617ad97
FB
127}
128
8bf0f969
MS
129/** Parse a string p in the form of Range:npt=xx-xx, and determine the start
130 * and end time.
131 * Used for seeking in the rtp stream.
132 */
133static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
134{
135 char buf[256];
136
137 p += strspn(p, SPACE_CHARS);
138 if (!av_stristart(p, "npt=", &p))
139 return;
140
141 *start = AV_NOPTS_VALUE;
142 *end = AV_NOPTS_VALUE;
143
144 get_word_sep(buf, sizeof(buf), "-", &p);
9fcae973 145 av_parse_time(start, buf, 1);
8bf0f969
MS
146 if (*p == '-') {
147 p++;
148 get_word_sep(buf, sizeof(buf), "-", &p);
9fcae973 149 av_parse_time(end, buf, 1);
8bf0f969
MS
150 }
151// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
152// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
153}
154
155static int get_sockaddr(const char *buf, struct sockaddr_storage *sock)
156{
157 struct addrinfo hints, *ai = NULL;
158 memset(&hints, 0, sizeof(hints));
159 hints.ai_flags = AI_NUMERICHOST;
160 if (getaddrinfo(buf, NULL, &hints, &ai))
161 return -1;
162 memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
163 freeaddrinfo(ai);
164 return 0;
165}
166
44b70ce5 167#if CONFIG_RTPDEC
003eb642
MS
168static void init_rtp_handler(RTPDynamicProtocolHandler *handler,
169 RTSPStream *rtsp_st, AVCodecContext *codec)
170{
171 if (!handler)
172 return;
173 codec->codec_id = handler->codec_id;
174 rtsp_st->dynamic_handler = handler;
4b3dc857 175 if (handler->alloc) {
9261e6cf 176 rtsp_st->dynamic_protocol_context = handler->alloc();
4b3dc857
MS
177 if (!rtsp_st->dynamic_protocol_context)
178 rtsp_st->dynamic_handler = NULL;
179 }
003eb642
MS
180}
181
c8965800 182/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
8f3c87f3 183static int sdp_parse_rtpmap(AVFormatContext *s,
86b6e387 184 AVStream *st, RTSPStream *rtsp_st,
c8965800 185 int payload_type, const char *p)
93ced3e8 186{
86b6e387 187 AVCodecContext *codec = st->codec;
93ced3e8 188 char buf[256];
d1ccf0e0
RD
189 int i;
190 AVCodec *c;
7b49ce2e 191 const char *c_name;
93ced3e8 192
d1ccf0e0 193 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
9d50d396
RB
194 * see if we can handle this kind of payload.
195 * The space should normally not be there but some Real streams or
196 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
197 * have a trailing space. */
198 get_word_sep(buf, sizeof(buf), "/ ", &p);
d1ccf0e0 199 if (payload_type >= RTP_PT_PRIVATE) {
003eb642
MS
200 RTPDynamicProtocolHandler *handler =
201 ff_rtp_handler_find_by_name(buf, codec->codec_type);
202 init_rtp_handler(handler, rtsp_st, codec);
160918d5
MS
203 /* If no dynamic handler was found, check with the list of standard
204 * allocated types, if such a stream for some reason happens to
205 * use a private payload type. This isn't handled in rtpdec.c, since
206 * the format name from the rtpmap line never is passed into rtpdec. */
207 if (!rtsp_st->dynamic_handler)
208 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
93ced3e8 209 } else {
c8965800
RB
210 /* We are in a standard case
211 * (from http://www.iana.org/assignments/rtp-parameters). */
d1ccf0e0 212 /* search into AVRtpPayloadTypes[] */
7ed19d7f 213 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
d1ccf0e0
RD
214 }
215
216 c = avcodec_find_decoder(codec->codec_id);
217 if (c && c->name)
7b49ce2e 218 c_name = c->name;
d1ccf0e0 219 else
170870b7 220 c_name = "(null)";
d1ccf0e0 221
7515ed0c
RB
222 get_word_sep(buf, sizeof(buf), "/", &p);
223 i = atoi(buf);
224 switch (codec->codec_type) {
72415b2a 225 case AVMEDIA_TYPE_AUDIO:
7515ed0c
RB
226 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
227 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
228 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
229 if (i > 0) {
230 codec->sample_rate = i;
c3f9ebf7 231 avpriv_set_pts_info(st, 32, 1, codec->sample_rate);
7515ed0c
RB
232 get_word_sep(buf, sizeof(buf), "/", &p);
233 i = atoi(buf);
234 if (i > 0)
235 codec->channels = i;
236 // TODO: there is a bug here; if it is a mono stream, and
237 // less than 22000Hz, faad upconverts to stereo and twice
238 // the frequency. No problem, but the sample rate is being
239 // set here by the sdp line. Patch on its way. (rdm)
d1ccf0e0 240 }
7515ed0c
RB
241 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
242 codec->sample_rate);
243 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
244 codec->channels);
245 break;
72415b2a 246 case AVMEDIA_TYPE_VIDEO:
7515ed0c 247 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
86b6e387 248 if (i > 0)
c3f9ebf7 249 avpriv_set_pts_info(st, 32, 1, i);
7515ed0c
RB
250 break;
251 default:
252 break;
253 }
25836606
MS
254 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->init)
255 rtsp_st->dynamic_handler->init(s, st->index,
256 rtsp_st->dynamic_protocol_context);
7515ed0c 257 return 0;
93ced3e8
FB
258}
259
c2bfd816 260/* parse the attribute line from the fmtp a line of an sdp response. This
c8965800
RB
261 * is broken out as a function because it is used in rtp_h264.c, which is
262 * forthcoming. */
3307e6ea 263int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
93993933 264 char *value, int value_size)
d0deedcb 265{
30619e6e 266 *p += strspn(*p, SPACE_CHARS);
c8965800 267 if (**p) {
d0deedcb
RM
268 get_word_sep(attr, attr_size, "=", p);
269 if (**p == '=')
270 (*p)++;
271 get_word_sep(value, value_size, ";", p);
272 if (**p == ';')
273 (*p)++;
274 return 1;
275 }
276 return 0;
277}
278
93ced3e8
FB
279typedef struct SDPParseState {
280 /* SDP only */
3fbd12d1 281 struct sockaddr_storage default_ip;
c8965800
RB
282 int default_ttl;
283 int skip_media; ///< set if an unknown m= line occurs
93ced3e8
FB
284} SDPParseState;
285
286static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
1617ad97
FB
287 int letter, const char *buf)
288{
8b1ab7bf 289 RTSPState *rt = s->priv_data;
1617ad97
FB
290 char buf1[64], st_type[64];
291 const char *p;
72415b2a 292 enum AVMediaType codec_type;
fb65d2ca 293 int payload_type, i;
1617ad97
FB
294 AVStream *st;
295 RTSPStream *rtsp_st;
3fbd12d1 296 struct sockaddr_storage sdp_ip;
93ced3e8
FB
297 int ttl;
298
dfd2a005 299 av_dlog(s, "sdp: %c='%s'\n", letter, buf);
1617ad97
FB
300
301 p = buf;
cb760a47
RB
302 if (s1->skip_media && letter != 'm')
303 return;
c8965800 304 switch (letter) {
93ced3e8
FB
305 case 'c':
306 get_word(buf1, sizeof(buf1), &p);
307 if (strcmp(buf1, "IN") != 0)
308 return;
309 get_word(buf1, sizeof(buf1), &p);
3fbd12d1 310 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
93ced3e8
FB
311 return;
312 get_word_sep(buf1, sizeof(buf1), "/", &p);
3fbd12d1 313 if (get_sockaddr(buf1, &sdp_ip))
93ced3e8
FB
314 return;
315 ttl = 16;
316 if (*p == '/') {
317 p++;
318 get_word_sep(buf1, sizeof(buf1), "/", &p);
319 ttl = atoi(buf1);
320 }
321 if (s->nb_streams == 0) {
322 s1->default_ip = sdp_ip;
323 s1->default_ttl = ttl;
324 } else {
d9c0510e 325 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
93ced3e8
FB
326 rtsp_st->sdp_ip = sdp_ip;
327 rtsp_st->sdp_ttl = ttl;
328 }
329 break;
1617ad97 330 case 's':
d2d67e42 331 av_dict_set(&s->metadata, "title", p, 0);
1617ad97
FB
332 break;
333 case 'i':
334 if (s->nb_streams == 0) {
d2d67e42 335 av_dict_set(&s->metadata, "comment", p, 0);
1617ad97
FB
336 break;
337 }
338 break;
339 case 'm':
340 /* new stream */
cb760a47 341 s1->skip_media = 0;
f011fcd6 342 codec_type = AVMEDIA_TYPE_UNKNOWN;
1617ad97
FB
343 get_word(st_type, sizeof(st_type), &p);
344 if (!strcmp(st_type, "audio")) {
72415b2a 345 codec_type = AVMEDIA_TYPE_AUDIO;
1617ad97 346 } else if (!strcmp(st_type, "video")) {
72415b2a 347 codec_type = AVMEDIA_TYPE_VIDEO;
090438cc 348 } else if (!strcmp(st_type, "application")) {
72415b2a 349 codec_type = AVMEDIA_TYPE_DATA;
f011fcd6
JB
350 }
351 if (codec_type == AVMEDIA_TYPE_UNKNOWN || !(rt->media_type_mask & (1 << codec_type))) {
cb760a47 352 s1->skip_media = 1;
1617ad97
FB
353 return;
354 }
1617ad97
FB
355 rtsp_st = av_mallocz(sizeof(RTSPStream));
356 if (!rtsp_st)
357 return;
8b1ab7bf
FB
358 rtsp_st->stream_index = -1;
359 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
93ced3e8
FB
360
361 rtsp_st->sdp_ip = s1->default_ip;
362 rtsp_st->sdp_ttl = s1->default_ttl;
363
93ced3e8
FB
364 get_word(buf1, sizeof(buf1), &p); /* port */
365 rtsp_st->sdp_port = atoi(buf1);
366
367 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 368
93ced3e8
FB
369 /* XXX: handle list of formats */
370 get_word(buf1, sizeof(buf1), &p); /* format list */
371 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 372
7ed19d7f 373 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
8b1ab7bf
FB
374 /* no corresponding stream */
375 } else {
84ad31ff 376 st = avformat_new_stream(s, NULL);
8b1ab7bf
FB
377 if (!st)
378 return;
84ad31ff 379 st->id = rt->nb_rtsp_streams - 1;
8b1ab7bf 380 rtsp_st->stream_index = st->index;
01f4895c 381 st->codec->codec_type = codec_type;
d1ccf0e0 382 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
6a7e31a9 383 RTPDynamicProtocolHandler *handler;
8b1ab7bf 384 /* if standard payload type, we can find the codec right now */
bf6d9818 385 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
bbd8f547
MS
386 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
387 st->codec->sample_rate > 0)
c3f9ebf7 388 avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate);
6a7e31a9
MS
389 /* Even static payload types may need a custom depacketizer */
390 handler = ff_rtp_handler_find_by_id(
391 rtsp_st->sdp_payload_type, st->codec->codec_type);
392 init_rtp_handler(handler, rtsp_st, st->codec);
25836606
MS
393 if (handler && handler->init)
394 handler->init(s, st->index,
395 rtsp_st->dynamic_protocol_context);
8b1ab7bf
FB
396 }
397 }
1617ad97 398 /* put a default control url */
00eb13e0 399 av_strlcpy(rtsp_st->control_url, rt->control_uri,
c8965800 400 sizeof(rtsp_st->control_url));
1617ad97
FB
401 break;
402 case 'a':
00eb13e0
AS
403 if (av_strstart(p, "control:", &p)) {
404 if (s->nb_streams == 0) {
405 if (!strncmp(p, "rtsp://", 7))
406 av_strlcpy(rt->control_uri, p,
407 sizeof(rt->control_uri));
408 } else {
0b6a7ff4
MS
409 char proto[32];
410 /* get the control url */
d9c0510e 411 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
115329f1 412
0b6a7ff4
MS
413 /* XXX: may need to add full url resolution */
414 av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
415 NULL, NULL, 0, p);
416 if (proto[0] == '\0') {
417 /* relative control URL */
418 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
419 av_strlcat(rtsp_st->control_url, "/",
420 sizeof(rtsp_st->control_url));
421 av_strlcat(rtsp_st->control_url, p,
422 sizeof(rtsp_st->control_url));
423 } else
424 av_strlcpy(rtsp_st->control_url, p,
425 sizeof(rtsp_st->control_url));
00eb13e0 426 }
83d14c85 427 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
93ced3e8 428 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 429 get_word(buf1, sizeof(buf1), &p);
93ced3e8 430 payload_type = atoi(buf1);
83d14c85 431 st = s->streams[s->nb_streams - 1];
d9c0510e 432 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
86b6e387 433 sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
7fc8ac7f
JA
434 } else if (av_strstart(p, "fmtp:", &p) ||
435 av_strstart(p, "framesize:", &p)) {
93ced3e8 436 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
d0deedcb
RM
437 // let dynamic protocol handlers have a stab at the line.
438 get_word(buf1, sizeof(buf1), &p);
439 payload_type = atoi(buf1);
d9c0510e
MS
440 for (i = 0; i < rt->nb_rtsp_streams; i++) {
441 rtsp_st = rt->rtsp_streams[i];
c8965800
RB
442 if (rtsp_st->sdp_payload_type == payload_type &&
443 rtsp_st->dynamic_handler &&
444 rtsp_st->dynamic_handler->parse_sdp_a_line)
445 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
446 rtsp_st->dynamic_protocol_context, buf);
d0deedcb 447 }
c8965800 448 } else if (av_strstart(p, "range:", &p)) {
31693e00
RM
449 int64_t start, end;
450
451 // this is so that seeking on a streamed file can work.
452 rtsp_parse_range_npt(p, &start, &end);
c8965800
RB
453 s->start_time = start;
454 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
455 s->duration = (end == AV_NOPTS_VALUE) ?
456 AV_NOPTS_VALUE : end - start;
119b4668
RB
457 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
458 if (atoi(p) == 1)
459 rt->transport = RTSP_TRANSPORT_RDT;
bb776f3b
MS
460 } else if (av_strstart(p, "SampleRate:integer;", &p) &&
461 s->nb_streams > 0) {
462 st = s->streams[s->nb_streams - 1];
463 st->codec->sample_rate = atoi(p);
1a30d541
RB
464 } else {
465 if (rt->server_type == RTSP_SERVER_WMS)
466 ff_wms_parse_sdp_a_line(s, p);
467 if (s->nb_streams > 0) {
c4a3d032
RB
468 if (rt->server_type == RTSP_SERVER_REAL)
469 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
470
d9c0510e 471 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
c4a3d032
RB
472 if (rtsp_st->dynamic_handler &&
473 rtsp_st->dynamic_handler->parse_sdp_a_line)
c8965800
RB
474 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
475 s->nb_streams - 1,
c4a3d032 476 rtsp_st->dynamic_protocol_context, buf);
1a30d541 477 }
1617ad97
FB
478 }
479 break;
480 }
481}
482
0526c6f7 483int ff_sdp_parse(AVFormatContext *s, const char *content)
1617ad97 484{
a8475bbd 485 RTSPState *rt = s->priv_data;
1617ad97
FB
486 const char *p;
487 int letter;
9211bcdd
RB
488 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
489 * contain long SDP lines containing complete ASF Headers (several
490 * kB) or arrays of MDPR (RM stream descriptor) headers plus
491 * "rulebooks" describing their properties. Therefore, the SDP line
373afbaf
RB
492 * buffer is large.
493 *
afcea58c
JA
494 * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
495 * in rtpdec_xiph.c. */
373afbaf 496 char buf[16384], *q;
93ced3e8 497 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 498
93ced3e8 499 memset(s1, 0, sizeof(SDPParseState));
1617ad97 500 p = content;
c8965800 501 for (;;) {
30619e6e 502 p += strspn(p, SPACE_CHARS);
1617ad97
FB
503 letter = *p;
504 if (letter == '\0')
505 break;
506 p++;
507 if (*p != '=')
508 goto next_line;
509 p++;
510 /* get the content */
511 q = buf;
b6892136 512 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
513 if ((q - buf) < sizeof(buf) - 1)
514 *q++ = *p;
515 p++;
516 }
517 *q = '\0';
93ced3e8 518 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
519 next_line:
520 while (*p != '\n' && *p != '\0')
521 p++;
522 if (*p == '\n')
523 p++;
524 }
a8475bbd
LB
525 rt->p = av_malloc(sizeof(struct pollfd)*2*(rt->nb_rtsp_streams+1));
526 if (!rt->p) return AVERROR(ENOMEM);
1617ad97
FB
527 return 0;
528}
44b70ce5 529#endif /* CONFIG_RTPDEC */
1617ad97 530
93e7490e
MS
531void ff_rtsp_undo_setup(AVFormatContext *s)
532{
533 RTSPState *rt = s->priv_data;
534 int i;
535
536 for (i = 0; i < rt->nb_rtsp_streams; i++) {
537 RTSPStream *rtsp_st = rt->rtsp_streams[i];
538 if (!rtsp_st)
539 continue;
540 if (rtsp_st->transport_priv) {
541 if (s->oformat) {
542 AVFormatContext *rtpctx = rtsp_st->transport_priv;
543 av_write_trailer(rtpctx);
544 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
545 uint8_t *ptr;
6dc7d80d 546 avio_close_dyn_buf(rtpctx->pb, &ptr);
93e7490e
MS
547 av_free(ptr);
548 } else {
22a3212e 549 avio_close(rtpctx->pb);
93e7490e 550 }
b22dbb29 551 avformat_free_context(rtpctx);
93e7490e
MS
552 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
553 ff_rdt_parse_close(rtsp_st->transport_priv);
554 else if (CONFIG_RTPDEC)
bfc6db44 555 ff_rtp_parse_close(rtsp_st->transport_priv);
93e7490e
MS
556 }
557 rtsp_st->transport_priv = NULL;
558 if (rtsp_st->rtp_handle)
e52a9145 559 ffurl_close(rtsp_st->rtp_handle);
93e7490e
MS
560 rtsp_st->rtp_handle = NULL;
561 }
562}
563
1ced9da3 564/* close and free RTSP streams */
3307e6ea 565void ff_rtsp_close_streams(AVFormatContext *s)
1ced9da3 566{
52aa4338 567 RTSPState *rt = s->priv_data;
1ced9da3
LA
568 int i;
569 RTSPStream *rtsp_st;
570
93e7490e 571 ff_rtsp_undo_setup(s);
c8965800 572 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1ced9da3
LA
573 rtsp_st = rt->rtsp_streams[i];
574 if (rtsp_st) {
1ced9da3 575 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
9261e6cf 576 rtsp_st->dynamic_handler->free(
c8965800 577 rtsp_st->dynamic_protocol_context);
ea7f0807 578 av_free(rtsp_st);
1ced9da3
LA
579 }
580 }
581 av_free(rt->rtsp_streams);
582 if (rt->asf_ctx) {
cd3716b9 583 avformat_close_input(&rt->asf_ctx);
1ced9da3 584 }
a8475bbd 585 av_free(rt->p);
96a7c975 586 av_free(rt->recvbuf);
1ced9da3
LA
587}
588
c8965800 589static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
1ced9da3
LA
590{
591 RTSPState *rt = s->priv_data;
592 AVStream *st = NULL;
593
594 /* open the RTP context */
595 if (rtsp_st->stream_index >= 0)
596 st = s->streams[rtsp_st->stream_index];
597 if (!st)
598 s->ctx_flags |= AVFMTCTX_NOHEADER;
599
44b70ce5 600 if (s->oformat && CONFIG_RTSP_MUXER) {
a493f80a
MS
601 rtsp_st->transport_priv = ff_rtp_chain_mux_open(s, st,
602 rtsp_st->rtp_handle,
603 RTSP_TCP_MAX_PACKET_SIZE);
c2bfd816 604 /* Ownership of rtp_handle is passed to the rtp mux context */
fd450a51 605 rtsp_st->rtp_handle = NULL;
44b70ce5 606 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
1ced9da3
LA
607 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
608 rtsp_st->dynamic_protocol_context,
609 rtsp_st->dynamic_handler);
44b70ce5 610 else if (CONFIG_RTPDEC)
bfc6db44 611 rtsp_st->transport_priv = ff_rtp_parse_open(s, st, rtsp_st->rtp_handle,
58ee0991
MS
612 rtsp_st->sdp_payload_type,
613 (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
614 ? 0 : RTP_REORDER_QUEUE_DEFAULT_SIZE);
1ced9da3
LA
615
616 if (!rtsp_st->transport_priv) {
617 return AVERROR(ENOMEM);
44b70ce5 618 } else if (rt->transport != RTSP_TRANSPORT_RDT && CONFIG_RTPDEC) {
c8965800 619 if (rtsp_st->dynamic_handler) {
bfc6db44
MS
620 ff_rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
621 rtsp_st->dynamic_protocol_context,
622 rtsp_st->dynamic_handler);
1ced9da3
LA
623 }
624 }
625
626 return 0;
627}
628
6f5a3d0a 629#if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
1617ad97
FB
630static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
631{
632 const char *p;
633 int v;
634
635 p = *pp;
30619e6e 636 p += strspn(p, SPACE_CHARS);
1617ad97
FB
637 v = strtol(p, (char **)&p, 10);
638 if (*p == '-') {
639 p++;
640 *min_ptr = v;
641 v = strtol(p, (char **)&p, 10);
642 *max_ptr = v;
643 } else {
644 *min_ptr = v;
645 *max_ptr = v;
646 }
647 *pp = p;
648}
649
650/* XXX: only one transport specification is parsed */
a9e534d5 651static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
1617ad97
FB
652{
653 char transport_protocol[16];
654 char profile[16];
655 char lower_transport[16];
656 char parameter[16];
657 RTSPTransportField *th;
658 char buf[256];
115329f1 659
1617ad97 660 reply->nb_transports = 0;
115329f1 661
c8965800 662 for (;;) {
30619e6e 663 p += strspn(p, SPACE_CHARS);
1617ad97
FB
664 if (*p == '\0')
665 break;
666
667 th = &reply->transports[reply->nb_transports];
668
115329f1 669 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97 670 "/", &p);
bb3244de 671 if (!av_strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
672 get_word_sep(profile, sizeof(profile), "/;,", &p);
673 lower_transport[0] = '\0';
674 /* rtp/avp/<protocol> */
675 if (*p == '/') {
7ecc634e
LB
676 get_word_sep(lower_transport, sizeof(lower_transport),
677 ";,", &p);
119b4668
RB
678 }
679 th->transport = RTSP_TRANSPORT_RTP;
bb3244de
RD
680 } else if (!av_strcasecmp (transport_protocol, "x-pn-tng") ||
681 !av_strcasecmp (transport_protocol, "x-real-rdt")) {
7ecc634e 682 /* x-pn-tng/<protocol> */
e1502118
LB
683 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
684 profile[0] = '\0';
119b4668 685 th->transport = RTSP_TRANSPORT_RDT;
1617ad97 686 }
bb3244de 687 if (!av_strcasecmp(lower_transport, "TCP"))
90abbdba 688 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1617ad97 689 else
90abbdba 690 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
115329f1 691
1617ad97
FB
692 if (*p == ';')
693 p++;
694 /* get each parameter */
695 while (*p != '\0' && *p != ',') {
696 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
697 if (!strcmp(parameter, "port")) {
698 if (*p == '=') {
699 p++;
700 rtsp_parse_range(&th->port_min, &th->port_max, &p);
701 }
702 } else if (!strcmp(parameter, "client_port")) {
703 if (*p == '=') {
704 p++;
115329f1 705 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
706 &th->client_port_max, &p);
707 }
708 } else if (!strcmp(parameter, "server_port")) {
709 if (*p == '=') {
710 p++;
115329f1 711 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
712 &th->server_port_max, &p);
713 }
714 } else if (!strcmp(parameter, "interleaved")) {
715 if (*p == '=') {
716 p++;
115329f1 717 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
718 &th->interleaved_max, &p);
719 }
720 } else if (!strcmp(parameter, "multicast")) {
90abbdba
RB
721 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
722 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
1617ad97
FB
723 } else if (!strcmp(parameter, "ttl")) {
724 if (*p == '=') {
725 p++;
726 th->ttl = strtol(p, (char **)&p, 10);
727 }
728 } else if (!strcmp(parameter, "destination")) {
1617ad97
FB
729 if (*p == '=') {
730 p++;
731 get_word_sep(buf, sizeof(buf), ";,", &p);
7934b15d 732 get_sockaddr(buf, &th->destination);
1617ad97 733 }
619298a8
JW
734 } else if (!strcmp(parameter, "source")) {
735 if (*p == '=') {
736 p++;
737 get_word_sep(buf, sizeof(buf), ";,", &p);
738 av_strlcpy(th->source, buf, sizeof(th->source));
739 }
1617ad97 740 }
619298a8 741
1617ad97
FB
742 while (*p != ';' && *p != '\0' && *p != ',')
743 p++;
744 if (*p == ';')
745 p++;
746 }
747 if (*p == ',')
748 p++;
749
750 reply->nb_transports++;
751 }
752}
753
29db7c3a
MS
754static void handle_rtp_info(RTSPState *rt, const char *url,
755 uint32_t seq, uint32_t rtptime)
756{
757 int i;
758 if (!rtptime || !url[0])
759 return;
760 if (rt->transport != RTSP_TRANSPORT_RTP)
761 return;
762 for (i = 0; i < rt->nb_rtsp_streams; i++) {
763 RTSPStream *rtsp_st = rt->rtsp_streams[i];
764 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
765 if (!rtpctx)
766 continue;
767 if (!strcmp(rtsp_st->control_url, url)) {
768 rtpctx->base_timestamp = rtptime;
769 break;
770 }
771 }
772}
773
774static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
775{
776 int read = 0;
777 char key[20], value[1024], url[1024] = "";
778 uint32_t seq = 0, rtptime = 0;
779
780 for (;;) {
781 p += strspn(p, SPACE_CHARS);
782 if (!*p)
783 break;
784 get_word_sep(key, sizeof(key), "=", &p);
785 if (*p != '=')
786 break;
787 p++;
788 get_word_sep(value, sizeof(value), ";, ", &p);
789 read++;
790 if (!strcmp(key, "url"))
791 av_strlcpy(url, value, sizeof(url));
792 else if (!strcmp(key, "seq"))
4515f9b5 793 seq = strtoul(value, NULL, 10);
29db7c3a 794 else if (!strcmp(key, "rtptime"))
4515f9b5 795 rtptime = strtoul(value, NULL, 10);
29db7c3a
MS
796 if (*p == ',') {
797 handle_rtp_info(rt, url, seq, rtptime);
798 url[0] = '\0';
799 seq = rtptime = 0;
800 read = 0;
801 }
802 if (*p)
803 p++;
804 }
805 if (read > 0)
806 handle_rtp_info(rt, url, seq, rtptime);
807}
808
2626308a 809void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
77223c53 810 RTSPState *rt, const char *method)
1617ad97
FB
811{
812 const char *p;
813
814 /* NOTE: we do case independent match for broken servers */
815 p = buf;
f7d78f36 816 if (av_stristart(p, "Session:", &p)) {
30e79845 817 int t;
1617ad97 818 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
30e79845
RB
819 if (av_stristart(p, ";timeout=", &p) &&
820 (t = strtol(p, NULL, 10)) > 0) {
821 reply->timeout = t;
822 }
f7d78f36 823 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 824 reply->content_length = strtol(p, NULL, 10);
f7d78f36 825 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 826 rtsp_parse_transport(reply, p);
f7d78f36 827 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 828 reply->seq = strtol(p, NULL, 10);
f7d78f36 829 } else if (av_stristart(p, "Range:", &p)) {
31693e00 830 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
30aa6aed 831 } else if (av_stristart(p, "RealChallenge1:", &p)) {
30619e6e 832 p += strspn(p, SPACE_CHARS);
30aa6aed 833 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
7a86bafa 834 } else if (av_stristart(p, "Server:", &p)) {
30619e6e 835 p += strspn(p, SPACE_CHARS);
7a86bafa 836 av_strlcpy(reply->server, p, sizeof(reply->server));
fccb1770
RB
837 } else if (av_stristart(p, "Notice:", &p) ||
838 av_stristart(p, "X-Notice:", &p)) {
839 reply->notice = strtol(p, NULL, 10);
d243ba30 840 } else if (av_stristart(p, "Location:", &p)) {
30619e6e 841 p += strspn(p, SPACE_CHARS);
d243ba30 842 av_strlcpy(reply->location, p , sizeof(reply->location));
acc9ed14 843 } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
30619e6e 844 p += strspn(p, SPACE_CHARS);
acc9ed14
MS
845 ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
846 } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
30619e6e 847 p += strspn(p, SPACE_CHARS);
acc9ed14 848 ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
d2995eb9 849 } else if (av_stristart(p, "Content-Base:", &p) && rt) {
dd22cfb1 850 p += strspn(p, SPACE_CHARS);
d2995eb9
MS
851 if (method && !strcmp(method, "DESCRIBE"))
852 av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
29db7c3a
MS
853 } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
854 p += strspn(p, SPACE_CHARS);
855 if (method && !strcmp(method, "PLAY"))
856 rtsp_parse_rtp_info(rt, p);
0b4949b5
MS
857 } else if (av_stristart(p, "Public:", &p) && rt) {
858 if (strstr(p, "GET_PARAMETER") &&
859 method && !strcmp(method, "OPTIONS"))
860 rt->get_parameter_supported = 1;
30eae325
MS
861 } else if (av_stristart(p, "x-Accept-Dynamic-Rate:", &p) && rt) {
862 p += strspn(p, SPACE_CHARS);
863 rt->accept_dynamic_rate = atoi(p);
1617ad97
FB
864 }
865}
866
b7b8fc34 867/* skip a RTP/TCP interleaved packet */
ec55edba 868void ff_rtsp_skip_packet(AVFormatContext *s)
b7b8fc34
FB
869{
870 RTSPState *rt = s->priv_data;
871 int ret, len, len1;
872 uint8_t buf[1024];
873
dce37564 874 ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
875 if (ret != 3)
876 return;
80fb8234 877 len = AV_RB16(buf + 1);
67c9cd69 878
dfd2a005 879 av_dlog(s, "skipping RTP packet len=%d\n", len);
67c9cd69 880
b7b8fc34
FB
881 /* skip payload */
882 while (len > 0) {
883 len1 = len;
884 if (len1 > sizeof(buf))
885 len1 = sizeof(buf);
dce37564 886 ret = ffurl_read_complete(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
887 if (ret != len1)
888 return;
889 len -= len1;
890 }
891}
1617ad97 892
3307e6ea 893int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
93993933 894 unsigned char **content_ptr,
3df54c6b 895 int return_on_interleaved_data, const char *method)
1617ad97
FB
896{
897 RTSPState *rt = s->priv_data;
898 char buf[4096], buf1[1024], *q;
899 unsigned char ch;
900 const char *p;
7e726132 901 int ret, content_length, line_count = 0;
1617ad97
FB
902 unsigned char *content = NULL;
903
d541a7d2 904 memset(reply, 0, sizeof(*reply));
1617ad97 905
1617ad97 906 /* parse reply (XXX: use buffers) */
1617ad97 907 rt->last_reply[0] = '\0';
c8965800 908 for (;;) {
1617ad97 909 q = buf;
c8965800 910 for (;;) {
dce37564 911 ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1);
dfd2a005 912 av_dlog(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
7e726132 913 if (ret != 1)
2401660d 914 return AVERROR_EOF;
1617ad97
FB
915 if (ch == '\n')
916 break;
b7b8fc34
FB
917 if (ch == '$') {
918 /* XXX: only parse it if first char on line ? */
7e726132
RB
919 if (return_on_interleaved_data) {
920 return 1;
921 } else
ec55edba 922 ff_rtsp_skip_packet(s);
b7b8fc34 923 } else if (ch != '\r') {
1617ad97
FB
924 if ((q - buf) < sizeof(buf) - 1)
925 *q++ = ch;
926 }
927 }
928 *q = '\0';
67c9cd69 929
dfd2a005 930 av_dlog(s, "line='%s'\n", buf);
67c9cd69 931
1617ad97
FB
932 /* test if last line */
933 if (buf[0] == '\0')
934 break;
935 p = buf;
936 if (line_count == 0) {
937 /* get reply code */
938 get_word(buf1, sizeof(buf1), &p);
939 get_word(buf1, sizeof(buf1), &p);
940 reply->status_code = atoi(buf1);
d93fdcbf 941 av_strlcpy(reply->reason, p, sizeof(reply->reason));
1617ad97 942 } else {
77223c53 943 ff_rtsp_parse_line(reply, p, rt, method);
75e61b0e
MR
944 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
945 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
946 }
947 line_count++;
948 }
115329f1 949
1617ad97 950 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 951 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 952
1617ad97
FB
953 content_length = reply->content_length;
954 if (content_length > 0) {
955 /* leave some room for a trailing '\0' (useful for simple parsing) */
956 content = av_malloc(content_length + 1);
dce37564 957 ffurl_read_complete(rt->rtsp_hd, content, content_length);
1617ad97
FB
958 content[content_length] = '\0';
959 }
960 if (content_ptr)
961 *content_ptr = content;
e2e2e7dd
AB
962 else
963 av_free(content);
7e726132 964
7ed8211b
LB
965 if (rt->seq != reply->seq) {
966 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
967 rt->seq, reply->seq);
968 }
969
fccb1770
RB
970 /* EOS */
971 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
972 reply->notice == 2104 /* Start-of-Stream Reached */ ||
c8965800 973 reply->notice == 2306 /* Continuous Feed Terminated */) {
fccb1770 974 rt->state = RTSP_STATE_IDLE;
c8965800 975 } else if (reply->notice >= 4400 && reply->notice < 5500) {
fccb1770 976 return AVERROR(EIO); /* data or server error */
c8965800 977 } else if (reply->notice == 2401 /* Ticket Expired */ ||
fccb1770
RB
978 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
979 return AVERROR(EPERM);
980
7e726132 981 return 0;
1617ad97
FB
982}
983
57c4d01e
DEP
984/**
985 * Send a command to the RTSP server without waiting for the reply.
986 *
987 * @param s RTSP (de)muxer context
988 * @param method the method for the request
989 * @param url the target url for the request
990 * @param headers extra header lines to include in the request
991 * @param send_content if non-null, the data to send as request body content
992 * @param send_content_length the length of the send_content data, or 0 if
993 * send_content is null
994 *
995 * @return zero if success, nonzero otherwise
996 */
997static int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
998 const char *method, const char *url,
999 const char *headers,
1000 const unsigned char *send_content,
1001 int send_content_length)
29b9f58b
RB
1002{
1003 RTSPState *rt = s->priv_data;
f5d33f52
JA
1004 char buf[4096], *out_buf;
1005 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
29b9f58b 1006
f5d33f52
JA
1007 /* Add in RTSP headers */
1008 out_buf = buf;
29b9f58b 1009 rt->seq++;
b17d11c6
MS
1010 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
1011 if (headers)
1012 av_strlcat(buf, headers, sizeof(buf));
7b4a3645 1013 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
b17d11c6
MS
1014 if (rt->session_id[0] != '\0' && (!headers ||
1015 !strstr(headers, "\nIf-Match:"))) {
7b4a3645 1016 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
29b9f58b 1017 }
aa8bf2fb
MS
1018 if (rt->auth[0]) {
1019 char *str = ff_http_auth_create_response(&rt->auth_state,
1020 rt->auth, url, method);
1021 if (str)
1022 av_strlcat(buf, str, sizeof(buf));
1023 av_free(str);
1024 }
dfd017bf
MS
1025 if (send_content_length > 0 && send_content)
1026 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
29b9f58b 1027 av_strlcat(buf, "\r\n", sizeof(buf));
67c9cd69 1028
f5d33f52
JA
1029 /* base64 encode rtsp if tunneling */
1030 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1031 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1032 out_buf = base64buf;
1033 }
1034
dfd2a005 1035 av_dlog(s, "Sending:\n%s--\n", buf);
67c9cd69 1036
925e908b 1037 ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
f5d33f52
JA
1038 if (send_content_length > 0 && send_content) {
1039 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1040 av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
1041 "with content data not supported\n");
1042 return AVERROR_PATCHWELCOME;
1043 }
925e908b 1044 ffurl_write(rt->rtsp_hd_out, send_content, send_content_length);
f5d33f52 1045 }
30e79845 1046 rt->last_cmd_time = av_gettime();
d0382374
JA
1047
1048 return 0;
30e79845
RB
1049}
1050
d0382374 1051int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
fc490fcf 1052 const char *url, const char *headers)
dfd017bf 1053{
d0382374 1054 return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
dfd017bf
MS
1055}
1056
d0382374 1057int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
fc490fcf
MS
1058 const char *headers, RTSPMessageHeader *reply,
1059 unsigned char **content_ptr)
30e79845 1060{
d0382374 1061 return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
fc490fcf 1062 content_ptr, NULL, 0);
29b9f58b
RB
1063}
1064
d0382374 1065int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
fc490fcf
MS
1066 const char *method, const char *url,
1067 const char *header,
1068 RTSPMessageHeader *reply,
1069 unsigned char **content_ptr,
1070 const unsigned char *send_content,
1071 int send_content_length)
dfd017bf 1072{
30af0779
MS
1073 RTSPState *rt = s->priv_data;
1074 HTTPAuthType cur_auth_type;
d0382374 1075 int ret;
30af0779
MS
1076
1077retry:
1078 cur_auth_type = rt->auth_state.auth_type;
d0382374 1079 if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
fc490fcf
MS
1080 send_content,
1081 send_content_length)))
d0382374 1082 return ret;
dfd017bf 1083
3df54c6b 1084 if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
d0382374 1085 return ret;
30af0779
MS
1086
1087 if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
1088 rt->auth_state.auth_type != HTTP_AUTH_NONE)
1089 goto retry;
d0382374 1090
bf55cf19 1091 if (reply->status_code > 400){
d93fdcbf 1092 av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
bf55cf19 1093 method,
d93fdcbf
LB
1094 reply->status_code,
1095 reply->reason);
bf55cf19
LB
1096 av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1097 }
1098
d0382374 1099 return 0;
dfd017bf
MS
1100}
1101
fef5649a 1102int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
c8965800 1103 int lower_transport, const char *real_challenge)
1617ad97
FB
1104{
1105 RTSPState *rt = s->priv_data;
4be386b3 1106 int rtx = 0, j, i, err, interleave = 0;
1617ad97 1107 RTSPStream *rtsp_st;
a9e534d5 1108 RTSPMessageHeader reply1, *reply = &reply1;
53620bba 1109 char cmd[2048];
e9dea59f
RB
1110 const char *trans_pref;
1111
119b4668 1112 if (rt->transport == RTSP_TRANSPORT_RDT)
e9dea59f
RB
1113 trans_pref = "x-pn-tng";
1114 else
1115 trans_pref = "RTP/AVP";
115329f1 1116
30e79845
RB
1117 /* default timeout: 1 minute */
1118 rt->timeout = 60;
1119
1617ad97
FB
1120 /* for each stream, make the setup request */
1121 /* XXX: we assume the same server is used for the control of each
c8965800 1122 * RTSP stream */
d1ccf0e0 1123
c8965800 1124 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
1125 char transport[2048];
1126
f75e3da5 1127 /*
f830c9a4
RB
1128 * WMS serves all UDP data over a single connection, the RTX, which
1129 * isn't necessarily the first in the SDP but has to be the first
1130 * to be set up, else the second/third SETUP will fail with a 461.
1131 */
1132 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1133 rt->server_type == RTSP_SERVER_WMS) {
1134 if (i == 0) {
1135 /* rtx first */
1136 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1137 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1138 if (len >= 4 &&
c8965800
RB
1139 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1140 "/rtx"))
f830c9a4
RB
1141 break;
1142 }
1143 if (rtx == rt->nb_rtsp_streams)
1144 return -1; /* no RTX found */
1145 rtsp_st = rt->rtsp_streams[rtx];
1146 } else
1147 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1148 } else
2fea9650 1149 rtsp_st = rt->rtsp_streams[i];
1617ad97 1150
1617ad97 1151 /* RTP/UDP */
90abbdba 1152 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
85fb7b34 1153 char buf[256];
85fb7b34 1154
f830c9a4
RB
1155 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1156 port = reply->transports[0].client_port_min;
1157 goto have_port;
1158 }
1159
85fb7b34 1160 /* first try in specified port range */
bc495bad
DV
1161 while (j <= RTSP_RTP_PORT_MAX) {
1162 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1163 "?localport=%d", j);
1164 /* we will use two ports per rtp stream (rtp and rtcp) */
1165 j += 2;
1166 if (!ffurl_open(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE,
1167 &s->interrupt_callback, NULL))
1168 goto rtp_opened;
1617ad97 1169 }
85fb7b34 1170
a3b058b7
MS
1171 av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1172 err = AVERROR(EIO);
1173 goto fail;
85fb7b34
FB
1174
1175 rtp_opened:
bfc6db44 1176 port = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
f830c9a4 1177 have_port:
0ad306bc 1178 snprintf(transport, sizeof(transport) - 1,
eee2cbff
RB
1179 "%s/UDP;", trans_pref);
1180 if (rt->server_type != RTSP_SERVER_REAL)
1181 av_strlcat(transport, "unicast;", sizeof(transport));
1182 av_strlcatf(transport, sizeof(transport),
1183 "client_port=%d", port);
f830c9a4
RB
1184 if (rt->transport == RTSP_TRANSPORT_RTP &&
1185 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
e9dea59f 1186 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1617ad97
FB
1187 }
1188
1189 /* RTP/TCP */
90abbdba 1190 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
f75e3da5 1191 /* For WMS streams, the application streams are only used for
090438cc
RB
1192 * UDP. When trying to set it up for TCP streams, the server
1193 * will return an error. Therefore, we skip those streams. */
1194 if (rt->server_type == RTSP_SERVER_WMS &&
c8965800 1195 s->streams[rtsp_st->stream_index]->codec->codec_type ==
72415b2a 1196 AVMEDIA_TYPE_DATA)
090438cc 1197 continue;
0ad306bc 1198 snprintf(transport, sizeof(transport) - 1,
d1c6e47c 1199 "%s/TCP;", trans_pref);
895678f8 1200 if (rt->transport != RTSP_TRANSPORT_RDT)
d1c6e47c
RB
1201 av_strlcat(transport, "unicast;", sizeof(transport));
1202 av_strlcatf(transport, sizeof(transport),
1203 "interleaved=%d-%d",
1204 interleave, interleave + 1);
1205 interleave += 2;
1617ad97
FB
1206 }
1207
90abbdba 1208 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
0ad306bc 1209 snprintf(transport, sizeof(transport) - 1,
e9dea59f 1210 "%s/UDP;multicast", trans_pref);
1617ad97 1211 }
69adcc4f
MS
1212 if (s->oformat) {
1213 av_strlcat(transport, ";mode=receive", sizeof(transport));
1214 } else if (rt->server_type == RTSP_SERVER_REAL ||
2efc97c2 1215 rt->server_type == RTSP_SERVER_WMS)
e9dea59f 1216 av_strlcat(transport, ";mode=play", sizeof(transport));
115329f1 1217 snprintf(cmd, sizeof(cmd),
b6892136 1218 "Transport: %s\r\n",
b17d11c6 1219 transport);
76b0d03d
MS
1220 if (rt->accept_dynamic_rate)
1221 av_strlcat(cmd, "x-Dynamic-Rate: 0\r\n", sizeof(cmd));
44b70ce5 1222 if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
e9dea59f
RB
1223 char real_res[41], real_csum[9];
1224 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1225 real_challenge);
1226 av_strlcatf(cmd, sizeof(cmd),
1227 "If-Match: %s\r\n"
1228 "RealChallenge2: %s, sd=%s\r\n",
1229 rt->session_id, real_res, real_csum);
1230 }
b17d11c6 1231 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
8a8754d8
RB
1232 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1233 err = 1;
1234 goto fail;
7e6ca34f
RB
1235 } else if (reply->status_code != RTSP_STATUS_OK ||
1236 reply->nb_transports != 1) {
1617ad97
FB
1237 err = AVERROR_INVALIDDATA;
1238 goto fail;
1239 }
1240
1241 /* XXX: same protocol for all streams is required */
1242 if (i > 0) {
119b4668
RB
1243 if (reply->transports[0].lower_transport != rt->lower_transport ||
1244 reply->transports[0].transport != rt->transport) {
1617ad97
FB
1245 err = AVERROR_INVALIDDATA;
1246 goto fail;
1247 }
1248 } else {
90abbdba 1249 rt->lower_transport = reply->transports[0].lower_transport;
119b4668 1250 rt->transport = reply->transports[0].transport;
1617ad97
FB
1251 }
1252
8c579c1c
MS
1253 /* Fail if the server responded with another lower transport mode
1254 * than what we requested. */
1255 if (reply->transports[0].lower_transport != lower_transport) {
1256 av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1257 err = AVERROR_INVALIDDATA;
1258 goto fail;
1617ad97
FB
1259 }
1260
90abbdba
RB
1261 switch(reply->transports[0].lower_transport) {
1262 case RTSP_LOWER_TRANSPORT_TCP:
1617ad97
FB
1263 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1264 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1265 break;
115329f1 1266
c8965800 1267 case RTSP_LOWER_TRANSPORT_UDP: {
a92c30d7 1268 char url[1024], options[30] = "";
c8965800 1269
9867aea5 1270 if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC)
a92c30d7 1271 av_strlcpy(options, "?connect=1", sizeof(options));
619298a8
JW
1272 /* Use source address if specified */
1273 if (reply->transports[0].source[0]) {
1274 ff_url_join(url, sizeof(url), "rtp", NULL,
1275 reply->transports[0].source,
d8407339 1276 reply->transports[0].server_port_min, "%s", options);
619298a8 1277 } else {
7bac991f 1278 ff_url_join(url, sizeof(url), "rtp", NULL, host,
d8407339 1279 reply->transports[0].server_port_min, "%s", options);
619298a8 1280 }
c8965800 1281 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
bfc6db44 1282 ff_rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
c8965800
RB
1283 err = AVERROR_INVALIDDATA;
1284 goto fail;
1617ad97 1285 }
9c8fa20d
MS
1286 /* Try to initialize the connection state in a
1287 * potential NAT router by sending dummy packets.
1288 * RTP/RTCP dummy packets are used for RDT, too.
1289 */
44b70ce5
MS
1290 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1291 CONFIG_RTPDEC)
bfc6db44 1292 ff_rtp_send_punch_packets(rtsp_st->rtp_handle);
1617ad97 1293 break;
c8965800
RB
1294 }
1295 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
7934b15d
MS
1296 char url[1024], namebuf[50];
1297 struct sockaddr_storage addr;
c8965800
RB
1298 int port, ttl;
1299
7934b15d
MS
1300 if (reply->transports[0].destination.ss_family) {
1301 addr = reply->transports[0].destination;
c8965800
RB
1302 port = reply->transports[0].port_min;
1303 ttl = reply->transports[0].ttl;
1304 } else {
7934b15d 1305 addr = rtsp_st->sdp_ip;
c8965800
RB
1306 port = rtsp_st->sdp_port;
1307 ttl = rtsp_st->sdp_ttl;
1308 }
7934b15d
MS
1309 getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1310 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1311 ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
57b5555c 1312 port, "?ttl=%d", ttl);
6f1b7b39 1313 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
ddffc2fd 1314 &s->interrupt_callback, NULL) < 0) {
c8965800
RB
1315 err = AVERROR_INVALIDDATA;
1316 goto fail;
1617ad97
FB
1317 }
1318 break;
1319 }
c8965800 1320 }
d1ccf0e0 1321
ee0cb67f 1322 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1323 goto fail;
1617ad97
FB
1324 }
1325
30e79845
RB
1326 if (reply->timeout > 0)
1327 rt->timeout = reply->timeout;
1328
2e889ae4 1329 if (rt->server_type == RTSP_SERVER_REAL)
1256d16b
RB
1330 rt->need_subscription = 1;
1331
53620bba
RB
1332 return 0;
1333
1334fail:
aeb2de1c 1335 ff_rtsp_undo_setup(s);
53620bba
RB
1336 return err;
1337}
1338
b8c2c41d
JA
1339void ff_rtsp_close_connections(AVFormatContext *s)
1340{
1341 RTSPState *rt = s->priv_data;
e52a9145
AK
1342 if (rt->rtsp_hd_out != rt->rtsp_hd) ffurl_close(rt->rtsp_hd_out);
1343 ffurl_close(rt->rtsp_hd);
6217b645 1344 rt->rtsp_hd = rt->rtsp_hd_out = NULL;
b8c2c41d
JA
1345}
1346
3307e6ea 1347int ff_rtsp_connect(AVFormatContext *s)
53620bba
RB
1348{
1349 RTSPState *rt = s->priv_data;
921da217
LB
1350 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1351 char *option_list, *option, *filename;
03f8fc08 1352 int port, err, tcp_fd;
354b7573 1353 RTSPMessageHeader reply1 = {0}, *reply = &reply1;
90abbdba 1354 int lower_transport_mask = 0;
2762a7a2 1355 char real_challenge[64] = "";
03f8fc08
MS
1356 struct sockaddr_storage peer;
1357 socklen_t peer_len = sizeof(peer);
57b5555c
MS
1358
1359 if (!ff_network_init())
1360 return AVERROR(EIO);
eca4850c 1361
f5d33f52 1362 rt->control_transport = RTSP_MODE_PLAIN;
eca4850c
MS
1363 if (rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_HTTP)) {
1364 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1365 rt->control_transport = RTSP_MODE_TUNNEL;
1366 }
1367 /* Only pass through valid flags from here */
1368 rt->lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
eca4850c
MS
1369
1370redirect:
1371 lower_transport_mask = rt->lower_transport_mask;
53620bba 1372 /* extract hostname and port */
f3bfe388 1373 av_url_split(NULL, 0, auth, sizeof(auth),
f984dcf6 1374 host, sizeof(host), &port, path, sizeof(path), s->filename);
f9337897 1375 if (*auth) {
aa8bf2fb 1376 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
f9337897 1377 }
53620bba
RB
1378 if (port < 0)
1379 port = RTSP_DEFAULT_PORT;
1380
eca4850c 1381#if FF_API_RTSP_URL_OPTIONS
53620bba 1382 /* search for options */
602eb779 1383 option_list = strrchr(path, '?');
53620bba 1384 if (option_list) {
2a21adf9
MS
1385 /* Strip out the RTSP specific options, write out the rest of
1386 * the options back into the same string. */
1387 filename = option_list;
c8965800 1388 while (option_list) {
eca4850c 1389 int handled = 1;
53620bba 1390 /* move the option pointer */
921da217 1391 option = ++option_list;
53620bba
RB
1392 option_list = strchr(option_list, '&');
1393 if (option_list)
921da217
LB
1394 *option_list = 0;
1395
53620bba 1396 /* handle the options */
c8965800 1397 if (!strcmp(option, "udp")) {
7a033e08 1398 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
c8965800 1399 } else if (!strcmp(option, "multicast")) {
7a033e08 1400 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
c8965800 1401 } else if (!strcmp(option, "tcp")) {
7a033e08 1402 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
f5d33f52
JA
1403 } else if(!strcmp(option, "http")) {
1404 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1405 rt->control_transport = RTSP_MODE_TUNNEL;
a92c30d7 1406 } else if (!strcmp(option, "filter_src")) {
9867aea5 1407 rt->rtsp_flags |= RTSP_FLAG_FILTER_SRC;
c8965800 1408 } else {
2a21adf9
MS
1409 /* Write options back into the buffer, using memmove instead
1410 * of strcpy since the strings may overlap. */
1411 int len = strlen(option);
1412 memmove(++filename, option, len);
1413 filename += len;
921da217 1414 if (option_list) *filename = '&';
eca4850c 1415 handled = 0;
921da217 1416 }
eca4850c
MS
1417 if (handled)
1418 av_log(s, AV_LOG_WARNING, "Options passed via URL are "
1419 "deprecated, use -rtsp_transport "
1420 "and -rtsp_flags instead.\n");
53620bba 1421 }
921da217 1422 *filename = 0;
53620bba 1423 }
eca4850c 1424#endif
53620bba 1425
90abbdba 1426 if (!lower_transport_mask)
2a1d51c5 1427 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
53620bba 1428
3e24c770 1429 if (s->oformat) {
b7dc88fc
MS
1430 /* Only UDP or TCP - UDP multicast isn't supported. */
1431 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1432 (1 << RTSP_LOWER_TRANSPORT_TCP);
f5d33f52 1433 if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
3e24c770 1434 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
b7dc88fc 1435 "only UDP and TCP are supported for output.\n");
3e24c770
MS
1436 err = AVERROR(EINVAL);
1437 goto fail;
1438 }
1439 }
1440
4bc5cc23
MS
1441 /* Construct the URI used in request; this is similar to s->filename,
1442 * but with authentication credentials removed and RTSP specific options
1443 * stripped out. */
1444 ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1445 host, port, "%s", path);
1446
f5d33f52
JA
1447 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1448 /* set up initial handshake for tunneling */
1449 char httpname[1024];
1450 char sessioncookie[17];
1451 char headers[1024];
1452
10ed37b5 1453 ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
f5d33f52
JA
1454 snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1455 av_get_random_seed(), av_get_random_seed());
1456
1457 /* GET requests */
6f1b7b39
MS
1458 if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ,
1459 &s->interrupt_callback) < 0) {
f5d33f52
JA
1460 err = AVERROR(EIO);
1461 goto fail;
1462 }
1463
1464 /* generate GET headers */
1465 snprintf(headers, sizeof(headers),
1466 "x-sessioncookie: %s\r\n"
1467 "Accept: application/x-rtsp-tunnelled\r\n"
1468 "Pragma: no-cache\r\n"
1469 "Cache-Control: no-cache\r\n",
1470 sessioncookie);
196bf28c 1471 av_opt_set(rt->rtsp_hd->priv_data, "headers", headers, 0);
f5d33f52
JA
1472
1473 /* complete the connection */
ddffc2fd 1474 if (ffurl_connect(rt->rtsp_hd, NULL)) {
f5d33f52
JA
1475 err = AVERROR(EIO);
1476 goto fail;
1477 }
1478
1479 /* POST requests */
6f1b7b39
MS
1480 if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE,
1481 &s->interrupt_callback) < 0 ) {
f5d33f52
JA
1482 err = AVERROR(EIO);
1483 goto fail;
1484 }
1485
1486 /* generate POST headers */
1487 snprintf(headers, sizeof(headers),
1488 "x-sessioncookie: %s\r\n"
1489 "Content-Type: application/x-rtsp-tunnelled\r\n"
1490 "Pragma: no-cache\r\n"
1491 "Cache-Control: no-cache\r\n"
1492 "Content-Length: 32767\r\n"
1493 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1494 sessioncookie);
196bf28c 1495 av_opt_set(rt->rtsp_hd_out->priv_data, "headers", headers, 0);
6149485f 1496 av_opt_set(rt->rtsp_hd_out->priv_data, "chunked_post", "0", 0);
f5d33f52 1497
a8ead332
MS
1498 /* Initialize the authentication state for the POST session. The HTTP
1499 * protocol implementation doesn't properly handle multi-pass
1500 * authentication for POST requests, since it would require one of
1501 * the following:
1502 * - implementing Expect: 100-continue, which many HTTP servers
1503 * don't support anyway, even less the RTSP servers that do HTTP
1504 * tunneling
1505 * - sending the whole POST data until getting a 401 reply specifying
1506 * what authentication method to use, then resending all that data
1507 * - waiting for potential 401 replies directly after sending the
1508 * POST header (waiting for some unspecified time)
1509 * Therefore, we copy the full auth state, which works for both basic
1510 * and digest. (For digest, we would have to synchronize the nonce
1511 * count variable between the two sessions, if we'd do more requests
1512 * with the original session, though.)
1513 */
1514 ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1515
9290f15d 1516 /* complete the connection */
ddffc2fd 1517 if (ffurl_connect(rt->rtsp_hd_out, NULL)) {
9290f15d
MS
1518 err = AVERROR(EIO);
1519 goto fail;
1520 }
f5d33f52 1521 } else {
48e77473 1522 /* open the tcp connection */
41874d0a 1523 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
6f1b7b39 1524 if (ffurl_open(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
ddffc2fd 1525 &s->interrupt_callback, NULL) < 0) {
41874d0a
JA
1526 err = AVERROR(EIO);
1527 goto fail;
1528 }
00e4a1f4 1529 rt->rtsp_hd_out = rt->rtsp_hd;
f5d33f52 1530 }
53620bba
RB
1531 rt->seq = 0;
1532
1869ea03 1533 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
03f8fc08
MS
1534 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1535 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1536 NULL, 0, NI_NUMERICHOST);
1537 }
1538
c8965800
RB
1539 /* request options supported by the server; this also detects server
1540 * type */
1cf151e9 1541 for (rt->server_type = RTSP_SERVER_RTP;;) {
b17d11c6 1542 cmd[0] = 0;
2e889ae4 1543 if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9 1544 av_strlcat(cmd,
f75e3da5 1545 /*
1cf151e9
RB
1546 * The following entries are required for proper
1547 * streaming from a Realmedia server. They are
1548 * interdependent in some way although we currently
1549 * don't quite understand how. Values were copied
1550 * from mplayer SVN r23589.
f75e3da5
DB
1551 * ClientChallenge is a 16-byte ID in hex
1552 * CompanyID is a 16-byte ID in base64
1cf151e9
RB
1553 */
1554 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1555 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1556 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1557 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1558 sizeof(cmd));
b17d11c6 1559 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1cf151e9
RB
1560 if (reply->status_code != RTSP_STATUS_OK) {
1561 err = AVERROR_INVALIDDATA;
1562 goto fail;
1563 }
1564
1565 /* detect server type if not standard-compliant RTP */
2e889ae4
RB
1566 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1567 rt->server_type = RTSP_SERVER_REAL;
1cf151e9 1568 continue;
bb3244de 1569 } else if (!av_strncasecmp(reply->server, "WMServer/", 9)) {
7a86bafa 1570 rt->server_type = RTSP_SERVER_WMS;
c8965800 1571 } else if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9 1572 strcpy(real_challenge, reply->real_challenge);
1cf151e9
RB
1573 break;
1574 }
1575
44b70ce5 1576 if (s->iformat && CONFIG_RTSP_DEMUXER)
0526c6f7 1577 err = ff_rtsp_setup_input_streams(s, reply);
44b70ce5 1578 else if (CONFIG_RTSP_MUXER)
c2688f3a 1579 err = ff_rtsp_setup_output_streams(s, host);
e23d195d 1580 if (err)
53620bba 1581 goto fail;
53620bba 1582
8a8754d8 1583 do {
c8965800
RB
1584 int lower_transport = ff_log2_tab[lower_transport_mask &
1585 ~(lower_transport_mask - 1)];
8a8754d8 1586
fef5649a 1587 err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
2e889ae4 1588 rt->server_type == RTSP_SERVER_REAL ?
e9dea59f 1589 real_challenge : NULL);
8a8754d8 1590 if (err < 0)
7e6ca34f 1591 goto fail;
90abbdba
RB
1592 lower_transport_mask &= ~(1 << lower_transport);
1593 if (lower_transport_mask == 0 && err == 1) {
28c4741a 1594 err = AVERROR(EPROTONOSUPPORT);
8a8754d8
RB
1595 goto fail;
1596 }
1597 } while (err);
53620bba 1598
2762a7a2
MS
1599 rt->lower_transport_mask = lower_transport_mask;
1600 av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
ff762d6e 1601 rt->state = RTSP_STATE_IDLE;
c8965800 1602 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1617ad97
FB
1603 return 0;
1604 fail:
3307e6ea 1605 ff_rtsp_close_streams(s);
b8c2c41d 1606 ff_rtsp_close_connections(s);
35cfd646 1607 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
d243ba30
LB
1608 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1609 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1610 reply->status_code,
1611 s->filename);
1612 goto redirect;
1613 }
57b5555c 1614 ff_network_close();
1617ad97
FB
1615 return err;
1616}
2e802e38 1617#endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1617ad97 1618
44b70ce5 1619#if CONFIG_RTPDEC
0e59034e 1620static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
321259c1 1621 uint8_t *buf, int buf_size, int64_t wait_end)
0e59034e
RB
1622{
1623 RTSPState *rt = s->priv_data;
1624 RTSPStream *rtsp_st;
a8475bbd
LB
1625 int n, i, ret, tcp_fd, timeout_cnt = 0;
1626 int max_p = 0;
1627 struct pollfd *p = rt->p;
0e59034e 1628
c8965800 1629 for (;;) {
9957cdbf 1630 if (ff_check_interrupt(&s->interrupt_callback))
c76374c6 1631 return AVERROR_EXIT;
321259c1
MS
1632 if (wait_end && wait_end - av_gettime() < 0)
1633 return AVERROR(EAGAIN);
a8475bbd 1634 max_p = 0;
0e59034e 1635 if (rt->rtsp_hd) {
1869ea03 1636 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
a8475bbd
LB
1637 p[max_p].fd = tcp_fd;
1638 p[max_p++].events = POLLIN;
0e59034e 1639 } else {
0e59034e
RB
1640 tcp_fd = -1;
1641 }
c8965800 1642 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1643 rtsp_st = rt->rtsp_streams[i];
1644 if (rtsp_st->rtp_handle) {
1869ea03 1645 p[max_p].fd = ffurl_get_file_handle(rtsp_st->rtp_handle);
a8475bbd 1646 p[max_p++].events = POLLIN;
bfc6db44 1647 p[max_p].fd = ff_rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
a8475bbd 1648 p[max_p++].events = POLLIN;
0e59034e
RB
1649 }
1650 }
a8475bbd 1651 n = poll(p, max_p, POLL_TIMEOUT_MS);
0e59034e 1652 if (n > 0) {
a8475bbd 1653 int j = 1 - (tcp_fd == -1);
9cba6f5f 1654 timeout_cnt = 0;
c8965800 1655 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1656 rtsp_st = rt->rtsp_streams[i];
1657 if (rtsp_st->rtp_handle) {
a8475bbd 1658 if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
bc371aca 1659 ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size);
0e59034e
RB
1660 if (ret > 0) {
1661 *prtsp_st = rtsp_st;
1662 return ret;
1663 }
1664 }
a8475bbd 1665 j+=2;
0e59034e
RB
1666 }
1667 }
5fe8021a 1668#if CONFIG_RTSP_DEMUXER
a8475bbd 1669 if (tcp_fd != -1 && p[0].revents & POLLIN) {
0e59034e
RB
1670 RTSPMessageHeader reply;
1671
3df54c6b 1672 ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
3032276b
MS
1673 if (ret < 0)
1674 return ret;
0e59034e 1675 /* XXX: parse message */
c02fd3d2 1676 if (rt->state != RTSP_STATE_STREAMING)
0e59034e
RB
1677 return 0;
1678 }
5fe8021a 1679#endif
9cba6f5f 1680 } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
28c4741a 1681 return AVERROR(ETIMEDOUT);
9cba6f5f
SG
1682 } else if (n < 0 && errno != EINTR)
1683 return AVERROR(errno);
0e59034e
RB
1684 }
1685}
1686
0526c6f7 1687int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
0e59034e
RB
1688{
1689 RTSPState *rt = s->priv_data;
1690 int ret, len;
321259c1
MS
1691 RTSPStream *rtsp_st, *first_queue_st = NULL;
1692 int64_t wait_end = 0;
0e59034e 1693
b20359f5
JA
1694 if (rt->nb_byes == rt->nb_rtsp_streams)
1695 return AVERROR_EOF;
1696
0e59034e
RB
1697 /* get next frames from the same RTP packet */
1698 if (rt->cur_transport_priv) {
c8965800 1699 if (rt->transport == RTSP_TRANSPORT_RDT) {
0e59034e 1700 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
c8965800 1701 } else
bfc6db44 1702 ret = ff_rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
0e59034e
RB
1703 if (ret == 0) {
1704 rt->cur_transport_priv = NULL;
1705 return 0;
1706 } else if (ret == 1) {
1707 return 0;
c8965800 1708 } else
0e59034e 1709 rt->cur_transport_priv = NULL;
0e59034e
RB
1710 }
1711
321259c1
MS
1712 if (rt->transport == RTSP_TRANSPORT_RTP) {
1713 int i;
1714 int64_t first_queue_time = 0;
1715 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1716 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
9e99f84f
MS
1717 int64_t queue_time;
1718 if (!rtpctx)
1719 continue;
1720 queue_time = ff_rtp_queued_packet_time(rtpctx);
321259c1
MS
1721 if (queue_time && (queue_time - first_queue_time < 0 ||
1722 !first_queue_time)) {
1723 first_queue_time = queue_time;
1724 first_queue_st = rt->rtsp_streams[i];
1725 }
1726 }
1727 if (first_queue_time)
1728 wait_end = first_queue_time + s->max_delay;
1729 }
1730
0e59034e
RB
1731 /* read next RTP packet */
1732 redo:
96a7c975
MS
1733 if (!rt->recvbuf) {
1734 rt->recvbuf = av_malloc(RECVBUF_SIZE);
1735 if (!rt->recvbuf)
1736 return AVERROR(ENOMEM);
1737 }
1738
0e59034e
RB
1739 switch(rt->lower_transport) {
1740 default:
5fe8021a 1741#if CONFIG_RTSP_DEMUXER
0e59034e 1742 case RTSP_LOWER_TRANSPORT_TCP:
0526c6f7 1743 len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
0e59034e 1744 break;
5fe8021a 1745#endif
0e59034e
RB
1746 case RTSP_LOWER_TRANSPORT_UDP:
1747 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
321259c1 1748 len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
2c35a6bd 1749 if (len > 0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
bfc6db44 1750 ff_rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
0e59034e
RB
1751 break;
1752 }
321259c1
MS
1753 if (len == AVERROR(EAGAIN) && first_queue_st &&
1754 rt->transport == RTSP_TRANSPORT_RTP) {
1755 rtsp_st = first_queue_st;
bfc6db44 1756 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
321259c1
MS
1757 goto end;
1758 }
0e59034e
RB
1759 if (len < 0)
1760 return len;
1761 if (len == 0)
1762 return AVERROR_EOF;
c8965800 1763 if (rt->transport == RTSP_TRANSPORT_RDT) {
ad4ad27f 1764 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2cab6b48 1765 } else {
bfc6db44 1766 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2cab6b48
MS
1767 if (ret < 0) {
1768 /* Either bad packet, or a RTCP packet. Check if the
1769 * first_rtcp_ntp_time field was initialized. */
1770 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1771 if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1772 /* first_rtcp_ntp_time has been initialized for this stream,
1773 * copy the same value to all other uninitialized streams,
1774 * in order to map their timestamp origin to the same ntp time
1775 * as this one. */
1776 int i;
3a1cdcc7
MS
1777 AVStream *st = NULL;
1778 if (rtsp_st->stream_index >= 0)
1779 st = s->streams[rtsp_st->stream_index];
2cab6b48 1780 for (i = 0; i < rt->nb_rtsp_streams; i++) {
744a882f 1781 RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
3a1cdcc7
MS
1782 AVStream *st2 = NULL;
1783 if (rt->rtsp_streams[i]->stream_index >= 0)
1784 st2 = s->streams[rt->rtsp_streams[i]->stream_index];
1785 if (rtpctx2 && st && st2 &&
1786 rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
2cab6b48 1787 rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
3a1cdcc7
MS
1788 rtpctx2->rtcp_ts_offset = av_rescale_q(
1789 rtpctx->rtcp_ts_offset, st->time_base,
1790 st2->time_base);
1791 }
2cab6b48
MS
1792 }
1793 }
b20359f5
JA
1794 if (ret == -RTCP_BYE) {
1795 rt->nb_byes++;
1796
1797 av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1798 rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1799
1800 if (rt->nb_byes == rt->nb_rtsp_streams)
1801 return AVERROR_EOF;
1802 }
2cab6b48
MS
1803 }
1804 }
321259c1 1805end:
0e59034e
RB
1806 if (ret < 0)
1807 goto redo;
c8965800 1808 if (ret == 1)
0e59034e
RB
1809 /* more packets may follow, so we save the RTP context */
1810 rt->cur_transport_priv = rtsp_st->transport_priv;
0e59034e
RB
1811
1812 return ret;
1813}
44b70ce5 1814#endif /* CONFIG_RTPDEC */
0e59034e 1815
44b70ce5 1816#if CONFIG_SDP_DEMUXER
cb1fdc61 1817static int sdp_probe(AVProbeData *p1)
93ced3e8 1818{
0e1ceacd 1819 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61 1820
3fbd12d1 1821 /* we look for a line beginning "c=IN IP" */
0e1ceacd 1822 while (p < p_end && *p != '\0') {
3fbd12d1
MS
1823 if (p + sizeof("c=IN IP") - 1 < p_end &&
1824 av_strstart(p, "c=IN IP", NULL))
cb1fdc61 1825 return AVPROBE_SCORE_MAX / 2;
0e1ceacd 1826
c8965800 1827 while (p < p_end - 1 && *p != '\n') p++;
0e1ceacd 1828 if (++p >= p_end)
cb1fdc61 1829 break;
cb1fdc61
FB
1830 if (*p == '\r')
1831 p++;
1832 }
93ced3e8
FB
1833 return 0;
1834}
1835
c8965800 1836static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
93ced3e8 1837{
8b1ab7bf 1838 RTSPState *rt = s->priv_data;
93ced3e8
FB
1839 RTSPStream *rtsp_st;
1840 int size, i, err;
1841 char *content;
1842 char url[1024];
1843
57b5555c
MS
1844 if (!ff_network_init())
1845 return AVERROR(EIO);
1846
93ced3e8
FB
1847 /* read the whole sdp file */
1848 /* XXX: better loading */
1849 content = av_malloc(SDP_MAX_SIZE);
b7effd4e 1850 size = avio_read(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1851 if (size <= 0) {
1852 av_free(content);
1853 return AVERROR_INVALIDDATA;
1854 }
1855 content[size] ='\0';
1856
f81c7ac7 1857 err = ff_sdp_parse(s, content);
93ced3e8 1858 av_free(content);
f81c7ac7 1859 if (err) goto fail;
93ced3e8
FB
1860
1861 /* open each RTP stream */
c8965800 1862 for (i = 0; i < rt->nb_rtsp_streams; i++) {
3fbd12d1 1863 char namebuf[50];
8b1ab7bf 1864 rtsp_st = rt->rtsp_streams[i];
115329f1 1865
3fbd12d1
MS
1866 getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
1867 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
57b5555c 1868 ff_url_join(url, sizeof(url), "rtp", NULL,
3fbd12d1 1869 namebuf, rtsp_st->sdp_port,
51369f28
MS
1870 "?localport=%d&ttl=%d&connect=%d", rtsp_st->sdp_port,
1871 rtsp_st->sdp_ttl,
1872 rt->rtsp_flags & RTSP_FLAG_FILTER_SRC ? 1 : 0);
6f1b7b39 1873 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
ddffc2fd 1874 &s->interrupt_callback, NULL) < 0) {
93ced3e8
FB
1875 err = AVERROR_INVALIDDATA;
1876 goto fail;
1877 }
ee0cb67f 1878 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1879 goto fail;
93ced3e8
FB
1880 }
1881 return 0;
c8965800 1882fail:
3307e6ea 1883 ff_rtsp_close_streams(s);
57b5555c 1884 ff_network_close();
93ced3e8
FB
1885 return err;
1886}
1887
93ced3e8
FB
1888static int sdp_read_close(AVFormatContext *s)
1889{
3307e6ea 1890 ff_rtsp_close_streams(s);
57b5555c 1891 ff_network_close();
93ced3e8
FB
1892 return 0;
1893}
1894
51369f28
MS
1895static const AVClass sdp_demuxer_class = {
1896 .class_name = "SDP demuxer",
1897 .item_name = av_default_item_name,
1898 .option = sdp_options,
1899 .version = LIBAVUTIL_VERSION_INT,
1900};
1901
c6610a21 1902AVInputFormat ff_sdp_demuxer = {
dfc2c4d9
AK
1903 .name = "sdp",
1904 .long_name = NULL_IF_CONFIG_SMALL("SDP"),
1905 .priv_data_size = sizeof(RTSPState),
1906 .read_probe = sdp_probe,
1907 .read_header = sdp_read_header,
1908 .read_packet = ff_rtsp_fetch_packet,
1909 .read_close = sdp_read_close,
51369f28 1910 .priv_class = &sdp_demuxer_class
93ced3e8 1911};
44b70ce5 1912#endif /* CONFIG_SDP_DEMUXER */
44594cc7 1913
44b70ce5 1914#if CONFIG_RTP_DEMUXER
44594cc7
MS
1915static int rtp_probe(AVProbeData *p)
1916{
1917 if (av_strstart(p->filename, "rtp:", NULL))
1918 return AVPROBE_SCORE_MAX;
1919 return 0;
1920}
1921
1922static int rtp_read_header(AVFormatContext *s,
1923 AVFormatParameters *ap)
1924{
1925 uint8_t recvbuf[1500];
1926 char host[500], sdp[500];
1927 int ret, port;
1928 URLContext* in = NULL;
1929 int payload_type;
1930 AVCodecContext codec;
1931 struct sockaddr_storage addr;
ae628ec1 1932 AVIOContext pb;
44594cc7 1933 socklen_t addrlen = sizeof(addr);
30266038 1934 RTSPState *rt = s->priv_data;
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1935
1936 if (!ff_network_init())
1937 return AVERROR(EIO);
1938
6f1b7b39 1939 ret = ffurl_open(&in, s->filename, AVIO_FLAG_READ,
ddffc2fd 1940 &s->interrupt_callback, NULL);
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1941 if (ret)
1942 goto fail;
1943
1944 while (1) {
bc371aca 1945 ret = ffurl_read(in, recvbuf, sizeof(recvbuf));
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1946 if (ret == AVERROR(EAGAIN))
1947 continue;
1948 if (ret < 0)
1949 goto fail;
1950 if (ret < 12) {
1951 av_log(s, AV_LOG_WARNING, "Received too short packet\n");
1952 continue;
1953 }
1954
1955 if ((recvbuf[0] & 0xc0) != 0x80) {
1956 av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
1957 "received\n");
1958 continue;
1959 }
1960
1961 payload_type = recvbuf[1] & 0x7f;
1962 break;
1963 }
1869ea03 1964 getsockname(ffurl_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
e52a9145 1965 ffurl_close(in);
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1966 in = NULL;
1967
1968 memset(&codec, 0, sizeof(codec));
1969 if (ff_rtp_get_codec_info(&codec, payload_type)) {
1970 av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
1971 "without an SDP file describing it\n",
1972 payload_type);
1973 goto fail;
1974 }
1975 if (codec.codec_type != AVMEDIA_TYPE_DATA) {
1976 av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
1977 "properly you need an SDP file "
1978 "describing it\n");
1979 }
1980
1981 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
1982 NULL, 0, s->filename);
1983
1984 snprintf(sdp, sizeof(sdp),
1985 "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
1986 addr.ss_family == AF_INET ? 4 : 6, host,
1987 codec.codec_type == AVMEDIA_TYPE_DATA ? "application" :
1988 codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
1989 port, payload_type);
1990 av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
1991
e731b8d8 1992 ffio_init_context(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
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1993 s->pb = &pb;
1994
1995 /* sdp_read_header initializes this again */
1996 ff_network_close();
1997
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1998 rt->media_type_mask = (1 << (AVMEDIA_TYPE_DATA+1)) - 1;
1999
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2000 ret = sdp_read_header(s, ap);
2001 s->pb = NULL;
2002 return ret;
2003
2004fail:
2005 if (in)
e52a9145 2006 ffurl_close(in);
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2007 ff_network_close();
2008 return ret;
2009}
2010
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2011static const AVClass rtp_demuxer_class = {
2012 .class_name = "RTP demuxer",
2013 .item_name = av_default_item_name,
2014 .option = rtp_options,
2015 .version = LIBAVUTIL_VERSION_INT,
2016};
2017
c6610a21 2018AVInputFormat ff_rtp_demuxer = {
dfc2c4d9
AK
2019 .name = "rtp",
2020 .long_name = NULL_IF_CONFIG_SMALL("RTP input format"),
2021 .priv_data_size = sizeof(RTSPState),
2022 .read_probe = rtp_probe,
2023 .read_header = rtp_read_header,
2024 .read_packet = ff_rtsp_fetch_packet,
2025 .read_close = sdp_read_close,
44594cc7 2026 .flags = AVFMT_NOFILE,
51369f28 2027 .priv_class = &rtp_demuxer_class
44594cc7 2028};
44b70ce5 2029#endif /* CONFIG_RTP_DEMUXER */
44594cc7 2030