2c616e80b7995f04d94b14ccd75ef65e6383df73
[libav.git] / libavformat / rtsp.c
1 /*
2 * RTSP/SDP client
3 * Copyright (c) 2002 Fabrice Bellard
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/base64.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/mathematics.h"
26 #include "libavutil/parseutils.h"
27 #include "libavutil/random_seed.h"
28 #include "libavutil/dict.h"
29 #include "libavutil/opt.h"
30 #include "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 "rtpproto.h"
45 #include "rdt.h"
46 #include "rtpdec_formats.h"
47 #include "rtpenc_chain.h"
48 #include "url.h"
49 #include "rtpenc.h"
50 #include "mpegts.h"
51
52 /* Timeout values for socket poll, in ms,
53 * and read_packet(), in seconds */
54 #define POLL_TIMEOUT_MS 100
55 #define READ_PACKET_TIMEOUT_S 10
56 #define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / POLL_TIMEOUT_MS
57 #define SDP_MAX_SIZE 16384
58 #define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
59 #define DEFAULT_REORDERING_DELAY 100000
60
61 #define OFFSET(x) offsetof(RTSPState, x)
62 #define DEC AV_OPT_FLAG_DECODING_PARAM
63 #define ENC AV_OPT_FLAG_ENCODING_PARAM
64
65 #define RTSP_FLAG_OPTS(name, longname) \
66 { name, longname, OFFSET(rtsp_flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC, "rtsp_flags" }, \
67 { "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" }
68
69 #define RTSP_MEDIATYPE_OPTS(name, longname) \
70 { 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" }, \
71 { "video", "Video", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_VIDEO}, 0, 0, DEC, "allowed_media_types" }, \
72 { "audio", "Audio", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_AUDIO}, 0, 0, DEC, "allowed_media_types" }, \
73 { "data", "Data", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_DATA}, 0, 0, DEC, "allowed_media_types" }
74
75 #define COMMON_OPTS() \
76 { "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 }, \
77 { "buffer_size", "Underlying protocol send/receive buffer size", OFFSET(buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, DEC|ENC } \
78
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 { "listen", "Wait for incoming connections", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_LISTEN}, 0, 0, DEC, "rtsp_flags" },
90 RTSP_MEDIATYPE_OPTS("allowed_media_types", "Media types to accept from the server"),
91 { "min_port", "Minimum local UDP port", OFFSET(rtp_port_min), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MIN}, 0, 65535, DEC|ENC },
92 { "max_port", "Maximum local UDP port", OFFSET(rtp_port_max), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MAX}, 0, 65535, DEC|ENC },
93 { "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 },
94 COMMON_OPTS(),
95 { NULL },
96 };
97
98 static const AVOption sdp_options[] = {
99 RTSP_FLAG_OPTS("sdp_flags", "SDP flags"),
100 { "custom_io", "Use custom IO", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_CUSTOM_IO}, 0, 0, DEC, "rtsp_flags" },
101 { "rtcp_to_source", "Send RTCP packets to the source address of received packets", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_RTCP_TO_SOURCE}, 0, 0, DEC, "rtsp_flags" },
102 RTSP_MEDIATYPE_OPTS("allowed_media_types", "Media types to accept from the server"),
103 COMMON_OPTS(),
104 { NULL },
105 };
106
107 static const AVOption rtp_options[] = {
108 RTSP_FLAG_OPTS("rtp_flags", "RTP flags"),
109 COMMON_OPTS(),
110 { NULL },
111 };
112
113
114 static AVDictionary *map_to_opts(RTSPState *rt)
115 {
116 AVDictionary *opts = NULL;
117 char buf[256];
118
119 snprintf(buf, sizeof(buf), "%d", rt->buffer_size);
120 av_dict_set(&opts, "buffer_size", buf, 0);
121
122 return opts;
123 }
124
125 static void get_word_until_chars(char *buf, int buf_size,
126 const char *sep, const char **pp)
127 {
128 const char *p;
129 char *q;
130
131 p = *pp;
132 p += strspn(p, SPACE_CHARS);
133 q = buf;
134 while (!strchr(sep, *p) && *p != '\0') {
135 if ((q - buf) < buf_size - 1)
136 *q++ = *p;
137 p++;
138 }
139 if (buf_size > 0)
140 *q = '\0';
141 *pp = p;
142 }
143
144 static void get_word_sep(char *buf, int buf_size, const char *sep,
145 const char **pp)
146 {
147 if (**pp == '/') (*pp)++;
148 get_word_until_chars(buf, buf_size, sep, pp);
149 }
150
151 static void get_word(char *buf, int buf_size, const char **pp)
152 {
153 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
154 }
155
156 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
157 * and end time.
158 * Used for seeking in the rtp stream.
159 */
160 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
161 {
162 char buf[256];
163
164 p += strspn(p, SPACE_CHARS);
165 if (!av_stristart(p, "npt=", &p))
166 return;
167
168 *start = AV_NOPTS_VALUE;
169 *end = AV_NOPTS_VALUE;
170
171 get_word_sep(buf, sizeof(buf), "-", &p);
172 if (av_parse_time(start, buf, 1) < 0)
173 return;
174 if (*p == '-') {
175 p++;
176 get_word_sep(buf, sizeof(buf), "-", &p);
177 av_parse_time(end, buf, 1);
178 }
179 }
180
181 static int get_sockaddr(AVFormatContext *s,
182 const char *buf, struct sockaddr_storage *sock)
183 {
184 struct addrinfo hints = { 0 }, *ai = NULL;
185 int ret;
186
187 hints.ai_flags = AI_NUMERICHOST;
188 if ((ret = getaddrinfo(buf, NULL, &hints, &ai))) {
189 av_log(s, AV_LOG_ERROR, "getaddrinfo(%s): %s\n",
190 buf,
191 gai_strerror(ret));
192 return -1;
193 }
194 memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
195 freeaddrinfo(ai);
196 return 0;
197 }
198
199 #if CONFIG_RTPDEC
200 static void init_rtp_handler(RTPDynamicProtocolHandler *handler,
201 RTSPStream *rtsp_st, AVStream *st)
202 {
203 AVCodecContext *codec = st ? st->codec : NULL;
204 if (!handler)
205 return;
206 if (codec)
207 codec->codec_id = handler->codec_id;
208 rtsp_st->dynamic_handler = handler;
209 if (st)
210 st->need_parsing = handler->need_parsing;
211 if (handler->priv_data_size) {
212 rtsp_st->dynamic_protocol_context = av_mallocz(handler->priv_data_size);
213 if (!rtsp_st->dynamic_protocol_context)
214 rtsp_st->dynamic_handler = NULL;
215 }
216 }
217
218 static void finalize_rtp_handler_init(AVFormatContext *s, RTSPStream *rtsp_st,
219 AVStream *st)
220 {
221 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->init) {
222 int ret = rtsp_st->dynamic_handler->init(s, st ? st->index : -1,
223 rtsp_st->dynamic_protocol_context);
224 if (ret < 0) {
225 if (rtsp_st->dynamic_protocol_context) {
226 if (rtsp_st->dynamic_handler->close)
227 rtsp_st->dynamic_handler->close(
228 rtsp_st->dynamic_protocol_context);
229 av_free(rtsp_st->dynamic_protocol_context);
230 }
231 rtsp_st->dynamic_protocol_context = NULL;
232 rtsp_st->dynamic_handler = NULL;
233 }
234 }
235 }
236
237 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
238 static int sdp_parse_rtpmap(AVFormatContext *s,
239 AVStream *st, RTSPStream *rtsp_st,
240 int payload_type, const char *p)
241 {
242 AVCodecContext *codec = st->codec;
243 char buf[256];
244 int i;
245 AVCodec *c;
246 const char *c_name;
247
248 /* See if we can handle this kind of payload.
249 * The space should normally not be there but some Real streams or
250 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
251 * have a trailing space. */
252 get_word_sep(buf, sizeof(buf), "/ ", &p);
253 if (payload_type < RTP_PT_PRIVATE) {
254 /* We are in a standard case
255 * (from http://www.iana.org/assignments/rtp-parameters). */
256 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
257 }
258
259 if (codec->codec_id == AV_CODEC_ID_NONE) {
260 RTPDynamicProtocolHandler *handler =
261 ff_rtp_handler_find_by_name(buf, codec->codec_type);
262 init_rtp_handler(handler, rtsp_st, st);
263 /* If no dynamic handler was found, check with the list of standard
264 * allocated types, if such a stream for some reason happens to
265 * use a private payload type. This isn't handled in rtpdec.c, since
266 * the format name from the rtpmap line never is passed into rtpdec. */
267 if (!rtsp_st->dynamic_handler)
268 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
269 }
270
271 c = avcodec_find_decoder(codec->codec_id);
272 if (c && c->name)
273 c_name = c->name;
274 else
275 c_name = "(null)";
276
277 get_word_sep(buf, sizeof(buf), "/", &p);
278 i = atoi(buf);
279 switch (codec->codec_type) {
280 case AVMEDIA_TYPE_AUDIO:
281 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
282 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
283 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
284 if (i > 0) {
285 codec->sample_rate = i;
286 avpriv_set_pts_info(st, 32, 1, codec->sample_rate);
287 get_word_sep(buf, sizeof(buf), "/", &p);
288 i = atoi(buf);
289 if (i > 0)
290 codec->channels = i;
291 }
292 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
293 codec->sample_rate);
294 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
295 codec->channels);
296 break;
297 case AVMEDIA_TYPE_VIDEO:
298 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
299 if (i > 0)
300 avpriv_set_pts_info(st, 32, 1, i);
301 break;
302 default:
303 break;
304 }
305 finalize_rtp_handler_init(s, rtsp_st, st);
306 return 0;
307 }
308
309 /* parse the attribute line from the fmtp a line of an sdp response. This
310 * is broken out as a function because it is used in rtp_h264.c, which is
311 * forthcoming. */
312 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
313 char *value, int value_size)
314 {
315 *p += strspn(*p, SPACE_CHARS);
316 if (**p) {
317 get_word_sep(attr, attr_size, "=", p);
318 if (**p == '=')
319 (*p)++;
320 get_word_sep(value, value_size, ";", p);
321 if (**p == ';')
322 (*p)++;
323 return 1;
324 }
325 return 0;
326 }
327
328 typedef struct SDPParseState {
329 /* SDP only */
330 struct sockaddr_storage default_ip;
331 int default_ttl;
332 int skip_media; ///< set if an unknown m= line occurs
333 int nb_default_include_source_addrs; /**< Number of source-specific multicast include source IP address (from SDP content) */
334 struct RTSPSource **default_include_source_addrs; /**< Source-specific multicast include source IP address (from SDP content) */
335 int nb_default_exclude_source_addrs; /**< Number of source-specific multicast exclude source IP address (from SDP content) */
336 struct RTSPSource **default_exclude_source_addrs; /**< Source-specific multicast exclude source IP address (from SDP content) */
337 int seen_rtpmap;
338 int seen_fmtp;
339 char delayed_fmtp[2048];
340 } SDPParseState;
341
342 static void copy_default_source_addrs(struct RTSPSource **addrs, int count,
343 struct RTSPSource ***dest, int *dest_count)
344 {
345 RTSPSource *rtsp_src, *rtsp_src2;
346 int i;
347 for (i = 0; i < count; i++) {
348 rtsp_src = addrs[i];
349 rtsp_src2 = av_malloc(sizeof(*rtsp_src2));
350 if (!rtsp_src2)
351 continue;
352 memcpy(rtsp_src2, rtsp_src, sizeof(*rtsp_src));
353 dynarray_add(dest, dest_count, rtsp_src2);
354 }
355 }
356
357 static void parse_fmtp(AVFormatContext *s, RTSPState *rt,
358 int payload_type, const char *line)
359 {
360 int i;
361
362 for (i = 0; i < rt->nb_rtsp_streams; i++) {
363 RTSPStream *rtsp_st = rt->rtsp_streams[i];
364 if (rtsp_st->sdp_payload_type == payload_type &&
365 rtsp_st->dynamic_handler &&
366 rtsp_st->dynamic_handler->parse_sdp_a_line) {
367 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
368 rtsp_st->dynamic_protocol_context, line);
369 }
370 }
371 }
372
373 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
374 int letter, const char *buf)
375 {
376 RTSPState *rt = s->priv_data;
377 char buf1[64], st_type[64];
378 const char *p;
379 enum AVMediaType codec_type;
380 int payload_type;
381 AVStream *st;
382 RTSPStream *rtsp_st;
383 RTSPSource *rtsp_src;
384 struct sockaddr_storage sdp_ip;
385 int ttl;
386
387 av_log(s, AV_LOG_TRACE, "sdp: %c='%s'\n", letter, buf);
388
389 p = buf;
390 if (s1->skip_media && letter != 'm')
391 return;
392 switch (letter) {
393 case 'c':
394 get_word(buf1, sizeof(buf1), &p);
395 if (strcmp(buf1, "IN") != 0)
396 return;
397 get_word(buf1, sizeof(buf1), &p);
398 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
399 return;
400 get_word_sep(buf1, sizeof(buf1), "/", &p);
401 if (get_sockaddr(s, buf1, &sdp_ip))
402 return;
403 ttl = 16;
404 if (*p == '/') {
405 p++;
406 get_word_sep(buf1, sizeof(buf1), "/", &p);
407 ttl = atoi(buf1);
408 }
409 if (s->nb_streams == 0) {
410 s1->default_ip = sdp_ip;
411 s1->default_ttl = ttl;
412 } else {
413 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
414 rtsp_st->sdp_ip = sdp_ip;
415 rtsp_st->sdp_ttl = ttl;
416 }
417 break;
418 case 's':
419 av_dict_set(&s->metadata, "title", p, 0);
420 break;
421 case 'i':
422 if (s->nb_streams == 0) {
423 av_dict_set(&s->metadata, "comment", p, 0);
424 break;
425 }
426 break;
427 case 'm':
428 /* new stream */
429 s1->skip_media = 0;
430 s1->seen_fmtp = 0;
431 s1->seen_rtpmap = 0;
432 codec_type = AVMEDIA_TYPE_UNKNOWN;
433 get_word(st_type, sizeof(st_type), &p);
434 if (!strcmp(st_type, "audio")) {
435 codec_type = AVMEDIA_TYPE_AUDIO;
436 } else if (!strcmp(st_type, "video")) {
437 codec_type = AVMEDIA_TYPE_VIDEO;
438 } else if (!strcmp(st_type, "application") || !strcmp(st_type, "text")) {
439 codec_type = AVMEDIA_TYPE_DATA;
440 }
441 if (codec_type == AVMEDIA_TYPE_UNKNOWN || !(rt->media_type_mask & (1 << codec_type))) {
442 s1->skip_media = 1;
443 return;
444 }
445 rtsp_st = av_mallocz(sizeof(RTSPStream));
446 if (!rtsp_st)
447 return;
448 rtsp_st->stream_index = -1;
449 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
450
451 rtsp_st->sdp_ip = s1->default_ip;
452 rtsp_st->sdp_ttl = s1->default_ttl;
453
454 copy_default_source_addrs(s1->default_include_source_addrs,
455 s1->nb_default_include_source_addrs,
456 &rtsp_st->include_source_addrs,
457 &rtsp_st->nb_include_source_addrs);
458 copy_default_source_addrs(s1->default_exclude_source_addrs,
459 s1->nb_default_exclude_source_addrs,
460 &rtsp_st->exclude_source_addrs,
461 &rtsp_st->nb_exclude_source_addrs);
462
463 get_word(buf1, sizeof(buf1), &p); /* port */
464 rtsp_st->sdp_port = atoi(buf1);
465
466 get_word(buf1, sizeof(buf1), &p); /* protocol */
467 if (!strcmp(buf1, "udp"))
468 rt->transport = RTSP_TRANSPORT_RAW;
469 else if (strstr(buf1, "/AVPF") || strstr(buf1, "/SAVPF"))
470 rtsp_st->feedback = 1;
471
472 /* XXX: handle list of formats */
473 get_word(buf1, sizeof(buf1), &p); /* format list */
474 rtsp_st->sdp_payload_type = atoi(buf1);
475
476 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
477 /* no corresponding stream */
478 if (rt->transport == RTSP_TRANSPORT_RAW) {
479 if (CONFIG_RTPDEC && !rt->ts)
480 rt->ts = ff_mpegts_parse_open(s);
481 } else {
482 RTPDynamicProtocolHandler *handler;
483 handler = ff_rtp_handler_find_by_id(
484 rtsp_st->sdp_payload_type, AVMEDIA_TYPE_DATA);
485 init_rtp_handler(handler, rtsp_st, NULL);
486 finalize_rtp_handler_init(s, rtsp_st, NULL);
487 }
488 } else if (rt->server_type == RTSP_SERVER_WMS &&
489 codec_type == AVMEDIA_TYPE_DATA) {
490 /* RTX stream, a stream that carries all the other actual
491 * audio/video streams. Don't expose this to the callers. */
492 } else {
493 st = avformat_new_stream(s, NULL);
494 if (!st)
495 return;
496 st->id = rt->nb_rtsp_streams - 1;
497 rtsp_st->stream_index = st->index;
498 st->codec->codec_type = codec_type;
499 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
500 RTPDynamicProtocolHandler *handler;
501 /* if standard payload type, we can find the codec right now */
502 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
503 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
504 st->codec->sample_rate > 0)
505 avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate);
506 /* Even static payload types may need a custom depacketizer */
507 handler = ff_rtp_handler_find_by_id(
508 rtsp_st->sdp_payload_type, st->codec->codec_type);
509 init_rtp_handler(handler, rtsp_st, st);
510 finalize_rtp_handler_init(s, rtsp_st, st);
511 }
512 if (rt->default_lang[0])
513 av_dict_set(&st->metadata, "language", rt->default_lang, 0);
514 }
515 /* put a default control url */
516 av_strlcpy(rtsp_st->control_url, rt->control_uri,
517 sizeof(rtsp_st->control_url));
518 break;
519 case 'a':
520 if (av_strstart(p, "control:", &p)) {
521 if (s->nb_streams == 0) {
522 if (!strncmp(p, "rtsp://", 7))
523 av_strlcpy(rt->control_uri, p,
524 sizeof(rt->control_uri));
525 } else {
526 char proto[32];
527 /* get the control url */
528 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
529
530 /* XXX: may need to add full url resolution */
531 av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
532 NULL, NULL, 0, p);
533 if (proto[0] == '\0') {
534 /* relative control URL */
535 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
536 av_strlcat(rtsp_st->control_url, "/",
537 sizeof(rtsp_st->control_url));
538 av_strlcat(rtsp_st->control_url, p,
539 sizeof(rtsp_st->control_url));
540 } else
541 av_strlcpy(rtsp_st->control_url, p,
542 sizeof(rtsp_st->control_url));
543 }
544 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
545 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
546 get_word(buf1, sizeof(buf1), &p);
547 payload_type = atoi(buf1);
548 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
549 if (rtsp_st->stream_index >= 0) {
550 st = s->streams[rtsp_st->stream_index];
551 sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
552 }
553 s1->seen_rtpmap = 1;
554 if (s1->seen_fmtp) {
555 parse_fmtp(s, rt, payload_type, s1->delayed_fmtp);
556 }
557 } else if (av_strstart(p, "fmtp:", &p) ||
558 av_strstart(p, "framesize:", &p)) {
559 // let dynamic protocol handlers have a stab at the line.
560 get_word(buf1, sizeof(buf1), &p);
561 payload_type = atoi(buf1);
562 if (s1->seen_rtpmap) {
563 parse_fmtp(s, rt, payload_type, buf);
564 } else {
565 s1->seen_fmtp = 1;
566 av_strlcpy(s1->delayed_fmtp, buf, sizeof(s1->delayed_fmtp));
567 }
568 } else if (av_strstart(p, "range:", &p)) {
569 int64_t start, end;
570
571 // this is so that seeking on a streamed file can work.
572 rtsp_parse_range_npt(p, &start, &end);
573 s->start_time = start;
574 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
575 s->duration = (end == AV_NOPTS_VALUE) ?
576 AV_NOPTS_VALUE : end - start;
577 } else if (av_strstart(p, "lang:", &p)) {
578 if (s->nb_streams > 0) {
579 get_word(buf1, sizeof(buf1), &p);
580 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
581 if (rtsp_st->stream_index >= 0) {
582 st = s->streams[rtsp_st->stream_index];
583 av_dict_set(&st->metadata, "language", buf1, 0);
584 }
585 } else
586 get_word(rt->default_lang, sizeof(rt->default_lang), &p);
587 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
588 if (atoi(p) == 1)
589 rt->transport = RTSP_TRANSPORT_RDT;
590 } else if (av_strstart(p, "SampleRate:integer;", &p) &&
591 s->nb_streams > 0) {
592 st = s->streams[s->nb_streams - 1];
593 st->codec->sample_rate = atoi(p);
594 } else if (av_strstart(p, "crypto:", &p) && s->nb_streams > 0) {
595 // RFC 4568
596 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
597 get_word(buf1, sizeof(buf1), &p); // ignore tag
598 get_word(rtsp_st->crypto_suite, sizeof(rtsp_st->crypto_suite), &p);
599 p += strspn(p, SPACE_CHARS);
600 if (av_strstart(p, "inline:", &p))
601 get_word(rtsp_st->crypto_params, sizeof(rtsp_st->crypto_params), &p);
602 } else if (av_strstart(p, "source-filter:", &p)) {
603 int exclude = 0;
604 get_word(buf1, sizeof(buf1), &p);
605 if (strcmp(buf1, "incl") && strcmp(buf1, "excl"))
606 return;
607 exclude = !strcmp(buf1, "excl");
608
609 get_word(buf1, sizeof(buf1), &p);
610 if (strcmp(buf1, "IN") != 0)
611 return;
612 get_word(buf1, sizeof(buf1), &p);
613 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6") && strcmp(buf1, "*"))
614 return;
615 // not checking that the destination address actually matches or is wildcard
616 get_word(buf1, sizeof(buf1), &p);
617
618 while (*p != '\0') {
619 rtsp_src = av_mallocz(sizeof(*rtsp_src));
620 if (!rtsp_src)
621 return;
622 get_word(rtsp_src->addr, sizeof(rtsp_src->addr), &p);
623 if (exclude) {
624 if (s->nb_streams == 0) {
625 dynarray_add(&s1->default_exclude_source_addrs, &s1->nb_default_exclude_source_addrs, rtsp_src);
626 } else {
627 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
628 dynarray_add(&rtsp_st->exclude_source_addrs, &rtsp_st->nb_exclude_source_addrs, rtsp_src);
629 }
630 } else {
631 if (s->nb_streams == 0) {
632 dynarray_add(&s1->default_include_source_addrs, &s1->nb_default_include_source_addrs, rtsp_src);
633 } else {
634 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
635 dynarray_add(&rtsp_st->include_source_addrs, &rtsp_st->nb_include_source_addrs, rtsp_src);
636 }
637 }
638 }
639 } else {
640 if (rt->server_type == RTSP_SERVER_WMS)
641 ff_wms_parse_sdp_a_line(s, p);
642 if (s->nb_streams > 0) {
643 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
644
645 if (rt->server_type == RTSP_SERVER_REAL)
646 ff_real_parse_sdp_a_line(s, rtsp_st->stream_index, p);
647
648 if (rtsp_st->dynamic_handler &&
649 rtsp_st->dynamic_handler->parse_sdp_a_line)
650 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
651 rtsp_st->stream_index,
652 rtsp_st->dynamic_protocol_context, buf);
653 }
654 }
655 break;
656 }
657 }
658
659 int ff_sdp_parse(AVFormatContext *s, const char *content)
660 {
661 RTSPState *rt = s->priv_data;
662 const char *p;
663 int letter, i;
664 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
665 * contain long SDP lines containing complete ASF Headers (several
666 * kB) or arrays of MDPR (RM stream descriptor) headers plus
667 * "rulebooks" describing their properties. Therefore, the SDP line
668 * buffer is large.
669 *
670 * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
671 * in rtpdec_xiph.c. */
672 char buf[16384], *q;
673 SDPParseState sdp_parse_state = { { 0 } }, *s1 = &sdp_parse_state;
674
675 p = content;
676 for (;;) {
677 p += strspn(p, SPACE_CHARS);
678 letter = *p;
679 if (letter == '\0')
680 break;
681 p++;
682 if (*p != '=')
683 goto next_line;
684 p++;
685 /* get the content */
686 q = buf;
687 while (*p != '\n' && *p != '\r' && *p != '\0') {
688 if ((q - buf) < sizeof(buf) - 1)
689 *q++ = *p;
690 p++;
691 }
692 *q = '\0';
693 sdp_parse_line(s, s1, letter, buf);
694 next_line:
695 while (*p != '\n' && *p != '\0')
696 p++;
697 if (*p == '\n')
698 p++;
699 }
700
701 for (i = 0; i < s1->nb_default_include_source_addrs; i++)
702 av_free(s1->default_include_source_addrs[i]);
703 av_freep(&s1->default_include_source_addrs);
704 for (i = 0; i < s1->nb_default_exclude_source_addrs; i++)
705 av_free(s1->default_exclude_source_addrs[i]);
706 av_freep(&s1->default_exclude_source_addrs);
707
708 rt->p = av_malloc(sizeof(struct pollfd)*2*(rt->nb_rtsp_streams+1));
709 if (!rt->p) return AVERROR(ENOMEM);
710 return 0;
711 }
712 #endif /* CONFIG_RTPDEC */
713
714 void ff_rtsp_undo_setup(AVFormatContext *s, int send_packets)
715 {
716 RTSPState *rt = s->priv_data;
717 int i;
718
719 for (i = 0; i < rt->nb_rtsp_streams; i++) {
720 RTSPStream *rtsp_st = rt->rtsp_streams[i];
721 if (!rtsp_st)
722 continue;
723 if (rtsp_st->transport_priv) {
724 if (s->oformat) {
725 AVFormatContext *rtpctx = rtsp_st->transport_priv;
726 av_write_trailer(rtpctx);
727 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
728 if (CONFIG_RTSP_MUXER && rtpctx->pb && send_packets)
729 ff_rtsp_tcp_write_packet(s, rtsp_st);
730 ffio_free_dyn_buf(&rtpctx->pb);
731 } else {
732 avio_close(rtpctx->pb);
733 }
734 avformat_free_context(rtpctx);
735 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT)
736 ff_rdt_parse_close(rtsp_st->transport_priv);
737 else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP)
738 ff_rtp_parse_close(rtsp_st->transport_priv);
739 }
740 rtsp_st->transport_priv = NULL;
741 if (rtsp_st->rtp_handle)
742 ffurl_close(rtsp_st->rtp_handle);
743 rtsp_st->rtp_handle = NULL;
744 }
745 }
746
747 /* close and free RTSP streams */
748 void ff_rtsp_close_streams(AVFormatContext *s)
749 {
750 RTSPState *rt = s->priv_data;
751 int i, j;
752 RTSPStream *rtsp_st;
753
754 ff_rtsp_undo_setup(s, 0);
755 for (i = 0; i < rt->nb_rtsp_streams; i++) {
756 rtsp_st = rt->rtsp_streams[i];
757 if (rtsp_st) {
758 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context) {
759 if (rtsp_st->dynamic_handler->close)
760 rtsp_st->dynamic_handler->close(
761 rtsp_st->dynamic_protocol_context);
762 av_free(rtsp_st->dynamic_protocol_context);
763 }
764 for (j = 0; j < rtsp_st->nb_include_source_addrs; j++)
765 av_free(rtsp_st->include_source_addrs[j]);
766 av_freep(&rtsp_st->include_source_addrs);
767 for (j = 0; j < rtsp_st->nb_exclude_source_addrs; j++)
768 av_free(rtsp_st->exclude_source_addrs[j]);
769 av_freep(&rtsp_st->exclude_source_addrs);
770
771 av_free(rtsp_st);
772 }
773 }
774 av_free(rt->rtsp_streams);
775 if (rt->asf_ctx) {
776 avformat_close_input(&rt->asf_ctx);
777 }
778 if (CONFIG_RTPDEC && rt->ts)
779 ff_mpegts_parse_close(rt->ts);
780 av_free(rt->p);
781 av_free(rt->recvbuf);
782 }
783
784 int ff_rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
785 {
786 RTSPState *rt = s->priv_data;
787 AVStream *st = NULL;
788 int reordering_queue_size = rt->reordering_queue_size;
789 if (reordering_queue_size < 0) {
790 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
791 reordering_queue_size = 0;
792 else
793 reordering_queue_size = RTP_REORDER_QUEUE_DEFAULT_SIZE;
794 }
795
796 /* open the RTP context */
797 if (rtsp_st->stream_index >= 0)
798 st = s->streams[rtsp_st->stream_index];
799 if (!st)
800 s->ctx_flags |= AVFMTCTX_NOHEADER;
801
802 if (CONFIG_RTSP_MUXER && s->oformat) {
803 int ret = ff_rtp_chain_mux_open((AVFormatContext **)&rtsp_st->transport_priv,
804 s, st, rtsp_st->rtp_handle,
805 RTSP_TCP_MAX_PACKET_SIZE,
806 rtsp_st->stream_index);
807 /* Ownership of rtp_handle is passed to the rtp mux context */
808 rtsp_st->rtp_handle = NULL;
809 if (ret < 0)
810 return ret;
811 st->time_base = ((AVFormatContext*)rtsp_st->transport_priv)->streams[0]->time_base;
812 } else if (rt->transport == RTSP_TRANSPORT_RAW) {
813 return 0; // Don't need to open any parser here
814 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT)
815 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
816 rtsp_st->dynamic_protocol_context,
817 rtsp_st->dynamic_handler);
818 else if (CONFIG_RTPDEC)
819 rtsp_st->transport_priv = ff_rtp_parse_open(s, st,
820 rtsp_st->sdp_payload_type,
821 reordering_queue_size);
822
823 if (!rtsp_st->transport_priv) {
824 return AVERROR(ENOMEM);
825 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP) {
826 if (rtsp_st->dynamic_handler) {
827 ff_rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
828 rtsp_st->dynamic_protocol_context,
829 rtsp_st->dynamic_handler);
830 }
831 if (rtsp_st->crypto_suite[0])
832 ff_rtp_parse_set_crypto(rtsp_st->transport_priv,
833 rtsp_st->crypto_suite,
834 rtsp_st->crypto_params);
835 }
836
837 return 0;
838 }
839
840 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
841 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
842 {
843 const char *q;
844 char *p;
845 int v;
846
847 q = *pp;
848 q += strspn(q, SPACE_CHARS);
849 v = strtol(q, &p, 10);
850 if (*p == '-') {
851 p++;
852 *min_ptr = v;
853 v = strtol(p, &p, 10);
854 *max_ptr = v;
855 } else {
856 *min_ptr = v;
857 *max_ptr = v;
858 }
859 *pp = p;
860 }
861
862 /* XXX: only one transport specification is parsed */
863 static void rtsp_parse_transport(AVFormatContext *s,
864 RTSPMessageHeader *reply, const char *p)
865 {
866 char transport_protocol[16];
867 char profile[16];
868 char lower_transport[16];
869 char parameter[16];
870 RTSPTransportField *th;
871 char buf[256];
872
873 reply->nb_transports = 0;
874
875 for (;;) {
876 p += strspn(p, SPACE_CHARS);
877 if (*p == '\0')
878 break;
879
880 th = &reply->transports[reply->nb_transports];
881
882 get_word_sep(transport_protocol, sizeof(transport_protocol),
883 "/", &p);
884 if (!av_strcasecmp (transport_protocol, "rtp")) {
885 get_word_sep(profile, sizeof(profile), "/;,", &p);
886 lower_transport[0] = '\0';
887 /* rtp/avp/<protocol> */
888 if (*p == '/') {
889 get_word_sep(lower_transport, sizeof(lower_transport),
890 ";,", &p);
891 }
892 th->transport = RTSP_TRANSPORT_RTP;
893 } else if (!av_strcasecmp (transport_protocol, "x-pn-tng") ||
894 !av_strcasecmp (transport_protocol, "x-real-rdt")) {
895 /* x-pn-tng/<protocol> */
896 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
897 profile[0] = '\0';
898 th->transport = RTSP_TRANSPORT_RDT;
899 } else if (!av_strcasecmp(transport_protocol, "raw")) {
900 get_word_sep(profile, sizeof(profile), "/;,", &p);
901 lower_transport[0] = '\0';
902 /* raw/raw/<protocol> */
903 if (*p == '/') {
904 get_word_sep(lower_transport, sizeof(lower_transport),
905 ";,", &p);
906 }
907 th->transport = RTSP_TRANSPORT_RAW;
908 }
909 if (!av_strcasecmp(lower_transport, "TCP"))
910 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
911 else
912 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
913
914 if (*p == ';')
915 p++;
916 /* get each parameter */
917 while (*p != '\0' && *p != ',') {
918 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
919 if (!strcmp(parameter, "port")) {
920 if (*p == '=') {
921 p++;
922 rtsp_parse_range(&th->port_min, &th->port_max, &p);
923 }
924 } else if (!strcmp(parameter, "client_port")) {
925 if (*p == '=') {
926 p++;
927 rtsp_parse_range(&th->client_port_min,
928 &th->client_port_max, &p);
929 }
930 } else if (!strcmp(parameter, "server_port")) {
931 if (*p == '=') {
932 p++;
933 rtsp_parse_range(&th->server_port_min,
934 &th->server_port_max, &p);
935 }
936 } else if (!strcmp(parameter, "interleaved")) {
937 if (*p == '=') {
938 p++;
939 rtsp_parse_range(&th->interleaved_min,
940 &th->interleaved_max, &p);
941 }
942 } else if (!strcmp(parameter, "multicast")) {
943 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
944 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
945 } else if (!strcmp(parameter, "ttl")) {
946 if (*p == '=') {
947 char *end;
948 p++;
949 th->ttl = strtol(p, &end, 10);
950 p = end;
951 }
952 } else if (!strcmp(parameter, "destination")) {
953 if (*p == '=') {
954 p++;
955 get_word_sep(buf, sizeof(buf), ";,", &p);
956 get_sockaddr(s, buf, &th->destination);
957 }
958 } else if (!strcmp(parameter, "source")) {
959 if (*p == '=') {
960 p++;
961 get_word_sep(buf, sizeof(buf), ";,", &p);
962 av_strlcpy(th->source, buf, sizeof(th->source));
963 }
964 } else if (!strcmp(parameter, "mode")) {
965 if (*p == '=') {
966 p++;
967 get_word_sep(buf, sizeof(buf), ";, ", &p);
968 if (!strcmp(buf, "record") ||
969 !strcmp(buf, "receive"))
970 th->mode_record = 1;
971 }
972 }
973
974 while (*p != ';' && *p != '\0' && *p != ',')
975 p++;
976 if (*p == ';')
977 p++;
978 }
979 if (*p == ',')
980 p++;
981
982 reply->nb_transports++;
983 if (reply->nb_transports >= RTSP_MAX_TRANSPORTS)
984 break;
985 }
986 }
987
988 static void handle_rtp_info(RTSPState *rt, const char *url,
989 uint32_t seq, uint32_t rtptime)
990 {
991 int i;
992 if (!rtptime || !url[0])
993 return;
994 if (rt->transport != RTSP_TRANSPORT_RTP)
995 return;
996 for (i = 0; i < rt->nb_rtsp_streams; i++) {
997 RTSPStream *rtsp_st = rt->rtsp_streams[i];
998 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
999 if (!rtpctx)
1000 continue;
1001 if (!strcmp(rtsp_st->control_url, url)) {
1002 rtpctx->base_timestamp = rtptime;
1003 break;
1004 }
1005 }
1006 }
1007
1008 static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
1009 {
1010 int read = 0;
1011 char key[20], value[1024], url[1024] = "";
1012 uint32_t seq = 0, rtptime = 0;
1013
1014 for (;;) {
1015 p += strspn(p, SPACE_CHARS);
1016 if (!*p)
1017 break;
1018 get_word_sep(key, sizeof(key), "=", &p);
1019 if (*p != '=')
1020 break;
1021 p++;
1022 get_word_sep(value, sizeof(value), ";, ", &p);
1023 read++;
1024 if (!strcmp(key, "url"))
1025 av_strlcpy(url, value, sizeof(url));
1026 else if (!strcmp(key, "seq"))
1027 seq = strtoul(value, NULL, 10);
1028 else if (!strcmp(key, "rtptime"))
1029 rtptime = strtoul(value, NULL, 10);
1030 if (*p == ',') {
1031 handle_rtp_info(rt, url, seq, rtptime);
1032 url[0] = '\0';
1033 seq = rtptime = 0;
1034 read = 0;
1035 }
1036 if (*p)
1037 p++;
1038 }
1039 if (read > 0)
1040 handle_rtp_info(rt, url, seq, rtptime);
1041 }
1042
1043 void ff_rtsp_parse_line(AVFormatContext *s,
1044 RTSPMessageHeader *reply, const char *buf,
1045 RTSPState *rt, const char *method)
1046 {
1047 const char *p;
1048
1049 /* NOTE: we do case independent match for broken servers */
1050 p = buf;
1051 if (av_stristart(p, "Session:", &p)) {
1052 int t;
1053 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
1054 if (av_stristart(p, ";timeout=", &p) &&
1055 (t = strtol(p, NULL, 10)) > 0) {
1056 reply->timeout = t;
1057 }
1058 } else if (av_stristart(p, "Content-Length:", &p)) {
1059 reply->content_length = strtol(p, NULL, 10);
1060 } else if (av_stristart(p, "Transport:", &p)) {
1061 rtsp_parse_transport(s, reply, p);
1062 } else if (av_stristart(p, "CSeq:", &p)) {
1063 reply->seq = strtol(p, NULL, 10);
1064 } else if (av_stristart(p, "Range:", &p)) {
1065 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
1066 } else if (av_stristart(p, "RealChallenge1:", &p)) {
1067 p += strspn(p, SPACE_CHARS);
1068 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
1069 } else if (av_stristart(p, "Server:", &p)) {
1070 p += strspn(p, SPACE_CHARS);
1071 av_strlcpy(reply->server, p, sizeof(reply->server));
1072 } else if (av_stristart(p, "Notice:", &p) ||
1073 av_stristart(p, "X-Notice:", &p)) {
1074 reply->notice = strtol(p, NULL, 10);
1075 } else if (av_stristart(p, "Location:", &p)) {
1076 p += strspn(p, SPACE_CHARS);
1077 av_strlcpy(reply->location, p , sizeof(reply->location));
1078 } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
1079 p += strspn(p, SPACE_CHARS);
1080 ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
1081 } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
1082 p += strspn(p, SPACE_CHARS);
1083 ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
1084 } else if (av_stristart(p, "Content-Base:", &p) && rt) {
1085 p += strspn(p, SPACE_CHARS);
1086 if (method && !strcmp(method, "DESCRIBE"))
1087 av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
1088 } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
1089 p += strspn(p, SPACE_CHARS);
1090 if (method && !strcmp(method, "PLAY"))
1091 rtsp_parse_rtp_info(rt, p);
1092 } else if (av_stristart(p, "Public:", &p) && rt) {
1093 if (strstr(p, "GET_PARAMETER") &&
1094 method && !strcmp(method, "OPTIONS"))
1095 rt->get_parameter_supported = 1;
1096 } else if (av_stristart(p, "x-Accept-Dynamic-Rate:", &p) && rt) {
1097 p += strspn(p, SPACE_CHARS);
1098 rt->accept_dynamic_rate = atoi(p);
1099 } else if (av_stristart(p, "Content-Type:", &p)) {
1100 p += strspn(p, SPACE_CHARS);
1101 av_strlcpy(reply->content_type, p, sizeof(reply->content_type));
1102 }
1103 }
1104
1105 /* skip a RTP/TCP interleaved packet */
1106 void ff_rtsp_skip_packet(AVFormatContext *s)
1107 {
1108 RTSPState *rt = s->priv_data;
1109 int ret, len, len1;
1110 uint8_t buf[1024];
1111
1112 ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
1113 if (ret != 3)
1114 return;
1115 len = AV_RB16(buf + 1);
1116
1117 av_log(s, AV_LOG_TRACE, "skipping RTP packet len=%d\n", len);
1118
1119 /* skip payload */
1120 while (len > 0) {
1121 len1 = len;
1122 if (len1 > sizeof(buf))
1123 len1 = sizeof(buf);
1124 ret = ffurl_read_complete(rt->rtsp_hd, buf, len1);
1125 if (ret != len1)
1126 return;
1127 len -= len1;
1128 }
1129 }
1130
1131 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
1132 unsigned char **content_ptr,
1133 int return_on_interleaved_data, const char *method)
1134 {
1135 RTSPState *rt = s->priv_data;
1136 char buf[4096], buf1[1024], *q;
1137 unsigned char ch;
1138 const char *p;
1139 int ret, content_length, line_count = 0, request = 0;
1140 unsigned char *content = NULL;
1141
1142 start:
1143 line_count = 0;
1144 request = 0;
1145 content = NULL;
1146 memset(reply, 0, sizeof(*reply));
1147
1148 /* parse reply (XXX: use buffers) */
1149 rt->last_reply[0] = '\0';
1150 for (;;) {
1151 q = buf;
1152 for (;;) {
1153 ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1);
1154 av_log(s, AV_LOG_TRACE, "ret=%d c=%02x [%c]\n", ret, ch, ch);
1155 if (ret != 1)
1156 return AVERROR_EOF;
1157 if (ch == '\n')
1158 break;
1159 if (ch == '$' && q == buf) {
1160 if (return_on_interleaved_data) {
1161 return 1;
1162 } else
1163 ff_rtsp_skip_packet(s);
1164 } else if (ch != '\r') {
1165 if ((q - buf) < sizeof(buf) - 1)
1166 *q++ = ch;
1167 }
1168 }
1169 *q = '\0';
1170
1171 av_log(s, AV_LOG_TRACE, "line='%s'\n", buf);
1172
1173 /* test if last line */
1174 if (buf[0] == '\0')
1175 break;
1176 p = buf;
1177 if (line_count == 0) {
1178 /* get reply code */
1179 get_word(buf1, sizeof(buf1), &p);
1180 if (!strncmp(buf1, "RTSP/", 5)) {
1181 get_word(buf1, sizeof(buf1), &p);
1182 reply->status_code = atoi(buf1);
1183 av_strlcpy(reply->reason, p, sizeof(reply->reason));
1184 } else {
1185 av_strlcpy(reply->reason, buf1, sizeof(reply->reason)); // method
1186 get_word(buf1, sizeof(buf1), &p); // object
1187 request = 1;
1188 }
1189 } else {
1190 ff_rtsp_parse_line(s, reply, p, rt, method);
1191 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
1192 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1193 }
1194 line_count++;
1195 }
1196
1197 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0' && !request)
1198 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
1199
1200 content_length = reply->content_length;
1201 if (content_length > 0) {
1202 /* leave some room for a trailing '\0' (useful for simple parsing) */
1203 content = av_malloc(content_length + 1);
1204 if (!content)
1205 return AVERROR(ENOMEM);
1206 ffurl_read_complete(rt->rtsp_hd, content, content_length);
1207 content[content_length] = '\0';
1208 }
1209 if (content_ptr)
1210 *content_ptr = content;
1211 else
1212 av_free(content);
1213
1214 if (request) {
1215 char buf[1024];
1216 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1217 const char* ptr = buf;
1218
1219 if (!strcmp(reply->reason, "OPTIONS")) {
1220 snprintf(buf, sizeof(buf), "RTSP/1.0 200 OK\r\n");
1221 if (reply->seq)
1222 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", reply->seq);
1223 if (reply->session_id[0])
1224 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n",
1225 reply->session_id);
1226 } else {
1227 snprintf(buf, sizeof(buf), "RTSP/1.0 501 Not Implemented\r\n");
1228 }
1229 av_strlcat(buf, "\r\n", sizeof(buf));
1230
1231 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1232 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1233 ptr = base64buf;
1234 }
1235 ffurl_write(rt->rtsp_hd_out, ptr, strlen(ptr));
1236
1237 rt->last_cmd_time = av_gettime_relative();
1238 /* Even if the request from the server had data, it is not the data
1239 * that the caller wants or expects. The memory could also be leaked
1240 * if the actual following reply has content data. */
1241 if (content_ptr)
1242 av_freep(content_ptr);
1243 /* If method is set, this is called from ff_rtsp_send_cmd,
1244 * where a reply to exactly this request is awaited. For
1245 * callers from within packet receiving, we just want to
1246 * return to the caller and go back to receiving packets. */
1247 if (method)
1248 goto start;
1249 return 0;
1250 }
1251
1252 if (rt->seq != reply->seq) {
1253 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
1254 rt->seq, reply->seq);
1255 }
1256
1257 /* EOS */
1258 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
1259 reply->notice == 2104 /* Start-of-Stream Reached */ ||
1260 reply->notice == 2306 /* Continuous Feed Terminated */) {
1261 rt->state = RTSP_STATE_IDLE;
1262 } else if (reply->notice >= 4400 && reply->notice < 5500) {
1263 return AVERROR(EIO); /* data or server error */
1264 } else if (reply->notice == 2401 /* Ticket Expired */ ||
1265 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
1266 return AVERROR(EPERM);
1267
1268 return 0;
1269 }
1270
1271 /**
1272 * Send a command to the RTSP server without waiting for the reply.
1273 *
1274 * @param s RTSP (de)muxer context
1275 * @param method the method for the request
1276 * @param url the target url for the request
1277 * @param headers extra header lines to include in the request
1278 * @param send_content if non-null, the data to send as request body content
1279 * @param send_content_length the length of the send_content data, or 0 if
1280 * send_content is null
1281 *
1282 * @return zero if success, nonzero otherwise
1283 */
1284 static int rtsp_send_cmd_with_content_async(AVFormatContext *s,
1285 const char *method, const char *url,
1286 const char *headers,
1287 const unsigned char *send_content,
1288 int send_content_length)
1289 {
1290 RTSPState *rt = s->priv_data;
1291 char buf[4096], *out_buf;
1292 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1293
1294 /* Add in RTSP headers */
1295 out_buf = buf;
1296 rt->seq++;
1297 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
1298 if (headers)
1299 av_strlcat(buf, headers, sizeof(buf));
1300 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
1301 av_strlcatf(buf, sizeof(buf), "User-Agent: %s\r\n", LIBAVFORMAT_IDENT);
1302 if (rt->session_id[0] != '\0' && (!headers ||
1303 !strstr(headers, "\nIf-Match:"))) {
1304 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
1305 }
1306 if (rt->auth[0]) {
1307 char *str = ff_http_auth_create_response(&rt->auth_state,
1308 rt->auth, url, method);
1309 if (str)
1310 av_strlcat(buf, str, sizeof(buf));
1311 av_free(str);
1312 }
1313 if (send_content_length > 0 && send_content)
1314 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
1315 av_strlcat(buf, "\r\n", sizeof(buf));
1316
1317 /* base64 encode rtsp if tunneling */
1318 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1319 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1320 out_buf = base64buf;
1321 }
1322
1323 av_log(s, AV_LOG_TRACE, "Sending:\n%s--\n", buf);
1324
1325 ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
1326 if (send_content_length > 0 && send_content) {
1327 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1328 av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
1329 "with content data not supported\n");
1330 return AVERROR_PATCHWELCOME;
1331 }
1332 ffurl_write(rt->rtsp_hd_out, send_content, send_content_length);
1333 }
1334 rt->last_cmd_time = av_gettime_relative();
1335
1336 return 0;
1337 }
1338
1339 int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1340 const char *url, const char *headers)
1341 {
1342 return rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1343 }
1344
1345 int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1346 const char *headers, RTSPMessageHeader *reply,
1347 unsigned char **content_ptr)
1348 {
1349 return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1350 content_ptr, NULL, 0);
1351 }
1352
1353 int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1354 const char *method, const char *url,
1355 const char *header,
1356 RTSPMessageHeader *reply,
1357 unsigned char **content_ptr,
1358 const unsigned char *send_content,
1359 int send_content_length)
1360 {
1361 RTSPState *rt = s->priv_data;
1362 HTTPAuthType cur_auth_type;
1363 int ret, attempts = 0;
1364
1365 retry:
1366 cur_auth_type = rt->auth_state.auth_type;
1367 if ((ret = rtsp_send_cmd_with_content_async(s, method, url, header,
1368 send_content,
1369 send_content_length)))
1370 return ret;
1371
1372 if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1373 return ret;
1374 attempts++;
1375
1376 if (reply->status_code == 401 &&
1377 (cur_auth_type == HTTP_AUTH_NONE || rt->auth_state.stale) &&
1378 rt->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2)
1379 goto retry;
1380
1381 if (reply->status_code > 400){
1382 av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1383 method,
1384 reply->status_code,
1385 reply->reason);
1386 av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1387 }
1388
1389 return 0;
1390 }
1391
1392 int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1393 int lower_transport, const char *real_challenge)
1394 {
1395 RTSPState *rt = s->priv_data;
1396 int rtx = 0, j, i, err, interleave = 0, port_off;
1397 RTSPStream *rtsp_st;
1398 RTSPMessageHeader reply1, *reply = &reply1;
1399 char cmd[2048];
1400 const char *trans_pref;
1401
1402 if (rt->transport == RTSP_TRANSPORT_RDT)
1403 trans_pref = "x-pn-tng";
1404 else if (rt->transport == RTSP_TRANSPORT_RAW)
1405 trans_pref = "RAW/RAW";
1406 else
1407 trans_pref = "RTP/AVP";
1408
1409 /* default timeout: 1 minute */
1410 rt->timeout = 60;
1411
1412 /* for each stream, make the setup request */
1413 /* XXX: we assume the same server is used for the control of each
1414 * RTSP stream */
1415
1416 /* Choose a random starting offset within the first half of the
1417 * port range, to allow for a number of ports to try even if the offset
1418 * happens to be at the end of the random range. */
1419 port_off = av_get_random_seed() % ((rt->rtp_port_max - rt->rtp_port_min)/2);
1420 /* even random offset */
1421 port_off -= port_off & 0x01;
1422
1423 for (j = rt->rtp_port_min + port_off, i = 0; i < rt->nb_rtsp_streams; ++i) {
1424 char transport[2048];
1425
1426 /*
1427 * WMS serves all UDP data over a single connection, the RTX, which
1428 * isn't necessarily the first in the SDP but has to be the first
1429 * to be set up, else the second/third SETUP will fail with a 461.
1430 */
1431 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1432 rt->server_type == RTSP_SERVER_WMS) {
1433 if (i == 0) {
1434 /* rtx first */
1435 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1436 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1437 if (len >= 4 &&
1438 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1439 "/rtx"))
1440 break;
1441 }
1442 if (rtx == rt->nb_rtsp_streams)
1443 return -1; /* no RTX found */
1444 rtsp_st = rt->rtsp_streams[rtx];
1445 } else
1446 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1447 } else
1448 rtsp_st = rt->rtsp_streams[i];
1449
1450 /* RTP/UDP */
1451 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1452 char buf[256];
1453
1454 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1455 port = reply->transports[0].client_port_min;
1456 goto have_port;
1457 }
1458
1459 /* first try in specified port range */
1460 while (j <= rt->rtp_port_max) {
1461 AVDictionary *opts = map_to_opts(rt);
1462
1463 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1464 "?localport=%d", j);
1465 /* we will use two ports per rtp stream (rtp and rtcp) */
1466 j += 2;
1467 err = ffurl_open(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE,
1468 &s->interrupt_callback, &opts);
1469
1470 av_dict_free(&opts);
1471
1472 if (!err)
1473 goto rtp_opened;
1474 }
1475
1476 av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1477 err = AVERROR(EIO);
1478 goto fail;
1479
1480 rtp_opened:
1481 port = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1482 have_port:
1483 snprintf(transport, sizeof(transport) - 1,
1484 "%s/UDP;", trans_pref);
1485 if (rt->server_type != RTSP_SERVER_REAL)
1486 av_strlcat(transport, "unicast;", sizeof(transport));
1487 av_strlcatf(transport, sizeof(transport),
1488 "client_port=%d", port);
1489 if (rt->transport == RTSP_TRANSPORT_RTP &&
1490 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1491 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1492 }
1493
1494 /* RTP/TCP */
1495 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1496 /* For WMS streams, the application streams are only used for
1497 * UDP. When trying to set it up for TCP streams, the server
1498 * will return an error. Therefore, we skip those streams. */
1499 if (rt->server_type == RTSP_SERVER_WMS &&
1500 (rtsp_st->stream_index < 0 ||
1501 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1502 AVMEDIA_TYPE_DATA))
1503 continue;
1504 snprintf(transport, sizeof(transport) - 1,
1505 "%s/TCP;", trans_pref);
1506 if (rt->transport != RTSP_TRANSPORT_RDT)
1507 av_strlcat(transport, "unicast;", sizeof(transport));
1508 av_strlcatf(transport, sizeof(transport),
1509 "interleaved=%d-%d",
1510 interleave, interleave + 1);
1511 interleave += 2;
1512 }
1513
1514 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1515 snprintf(transport, sizeof(transport) - 1,
1516 "%s/UDP;multicast", trans_pref);
1517 }
1518 if (s->oformat) {
1519 av_strlcat(transport, ";mode=record", sizeof(transport));
1520 } else if (rt->server_type == RTSP_SERVER_REAL ||
1521 rt->server_type == RTSP_SERVER_WMS)
1522 av_strlcat(transport, ";mode=play", sizeof(transport));
1523 snprintf(cmd, sizeof(cmd),
1524 "Transport: %s\r\n",
1525 transport);
1526 if (rt->accept_dynamic_rate)
1527 av_strlcat(cmd, "x-Dynamic-Rate: 0\r\n", sizeof(cmd));
1528 if (CONFIG_RTPDEC && i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1529 char real_res[41], real_csum[9];
1530 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1531 real_challenge);
1532 av_strlcatf(cmd, sizeof(cmd),
1533 "If-Match: %s\r\n"
1534 "RealChallenge2: %s, sd=%s\r\n",
1535 rt->session_id, real_res, real_csum);
1536 }
1537 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1538 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1539 err = 1;
1540 goto fail;
1541 } else if (reply->status_code != RTSP_STATUS_OK ||
1542 reply->nb_transports != 1) {
1543 err = AVERROR_INVALIDDATA;
1544 goto fail;
1545 }
1546
1547 /* XXX: same protocol for all streams is required */
1548 if (i > 0) {
1549 if (reply->transports[0].lower_transport != rt->lower_transport ||
1550 reply->transports[0].transport != rt->transport) {
1551 err = AVERROR_INVALIDDATA;
1552 goto fail;
1553 }
1554 } else {
1555 rt->lower_transport = reply->transports[0].lower_transport;
1556 rt->transport = reply->transports[0].transport;
1557 }
1558
1559 /* Fail if the server responded with another lower transport mode
1560 * than what we requested. */
1561 if (reply->transports[0].lower_transport != lower_transport) {
1562 av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1563 err = AVERROR_INVALIDDATA;
1564 goto fail;
1565 }
1566
1567 switch(reply->transports[0].lower_transport) {
1568 case RTSP_LOWER_TRANSPORT_TCP:
1569 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1570 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1571 break;
1572
1573 case RTSP_LOWER_TRANSPORT_UDP: {
1574 char url[1024], options[30] = "";
1575 const char *peer = host;
1576
1577 if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC)
1578 av_strlcpy(options, "?connect=1", sizeof(options));
1579 /* Use source address if specified */
1580 if (reply->transports[0].source[0])
1581 peer = reply->transports[0].source;
1582 ff_url_join(url, sizeof(url), "rtp", NULL, peer,
1583 reply->transports[0].server_port_min, "%s", options);
1584 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1585 ff_rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1586 err = AVERROR_INVALIDDATA;
1587 goto fail;
1588 }
1589 break;
1590 }
1591 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1592 char url[1024], namebuf[50], optbuf[20] = "";
1593 struct sockaddr_storage addr;
1594 int port, ttl;
1595
1596 if (reply->transports[0].destination.ss_family) {
1597 addr = reply->transports[0].destination;
1598 port = reply->transports[0].port_min;
1599 ttl = reply->transports[0].ttl;
1600 } else {
1601 addr = rtsp_st->sdp_ip;
1602 port = rtsp_st->sdp_port;
1603 ttl = rtsp_st->sdp_ttl;
1604 }
1605 if (ttl > 0)
1606 snprintf(optbuf, sizeof(optbuf), "?ttl=%d", ttl);
1607 getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1608 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1609 ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1610 port, "%s", optbuf);
1611 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
1612 &s->interrupt_callback, NULL) < 0) {
1613 err = AVERROR_INVALIDDATA;
1614 goto fail;
1615 }
1616 break;
1617 }
1618 }
1619
1620 if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
1621 goto fail;
1622 }
1623
1624 if (rt->nb_rtsp_streams && reply->timeout > 0)
1625 rt->timeout = reply->timeout;
1626
1627 if (rt->server_type == RTSP_SERVER_REAL)
1628 rt->need_subscription = 1;
1629
1630 return 0;
1631
1632 fail:
1633 ff_rtsp_undo_setup(s, 0);
1634 return err;
1635 }
1636
1637 void ff_rtsp_close_connections(AVFormatContext *s)
1638 {
1639 RTSPState *rt = s->priv_data;
1640 if (rt->rtsp_hd_out != rt->rtsp_hd) ffurl_close(rt->rtsp_hd_out);
1641 ffurl_close(rt->rtsp_hd);
1642 rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1643 }
1644
1645 int ff_rtsp_connect(AVFormatContext *s)
1646 {
1647 RTSPState *rt = s->priv_data;
1648 char proto[128], host[1024], path[1024];
1649 char tcpname[1024], cmd[2048], auth[128];
1650 const char *lower_rtsp_proto = "tcp";
1651 int port, err, tcp_fd;
1652 RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1653 int lower_transport_mask = 0;
1654 int default_port = RTSP_DEFAULT_PORT;
1655 char real_challenge[64] = "";
1656 struct sockaddr_storage peer;
1657 socklen_t peer_len = sizeof(peer);
1658
1659 if (rt->rtp_port_max < rt->rtp_port_min) {
1660 av_log(s, AV_LOG_ERROR, "Invalid UDP port range, max port %d less "
1661 "than min port %d\n", rt->rtp_port_max,
1662 rt->rtp_port_min);
1663 return AVERROR(EINVAL);
1664 }
1665
1666 if (!ff_network_init())
1667 return AVERROR(EIO);
1668
1669 if (s->max_delay < 0) /* Not set by the caller */
1670 s->max_delay = s->iformat ? DEFAULT_REORDERING_DELAY : 0;
1671
1672 rt->control_transport = RTSP_MODE_PLAIN;
1673 if (rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_HTTP)) {
1674 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1675 rt->control_transport = RTSP_MODE_TUNNEL;
1676 }
1677 /* Only pass through valid flags from here */
1678 rt->lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1679
1680 redirect:
1681 /* extract hostname and port */
1682 av_url_split(proto, sizeof(proto), auth, sizeof(auth),
1683 host, sizeof(host), &port, path, sizeof(path), s->filename);
1684
1685 if (!strcmp(proto, "rtsps")) {
1686 lower_rtsp_proto = "tls";
1687 default_port = RTSPS_DEFAULT_PORT;
1688 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1689 }
1690
1691 if (*auth) {
1692 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1693 }
1694 if (port < 0)
1695 port = default_port;
1696
1697 lower_transport_mask = rt->lower_transport_mask;
1698
1699 if (!lower_transport_mask)
1700 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1701
1702 if (s->oformat) {
1703 /* Only UDP or TCP - UDP multicast isn't supported. */
1704 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1705 (1 << RTSP_LOWER_TRANSPORT_TCP);
1706 if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1707 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1708 "only UDP and TCP are supported for output.\n");
1709 err = AVERROR(EINVAL);
1710 goto fail;
1711 }
1712 }
1713
1714 /* Construct the URI used in request; this is similar to s->filename,
1715 * but with authentication credentials removed and RTSP specific options
1716 * stripped out. */
1717 ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL,
1718 host, port, "%s", path);
1719
1720 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1721 /* set up initial handshake for tunneling */
1722 char httpname[1024];
1723 char sessioncookie[17];
1724 char headers[1024];
1725
1726 ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1727 snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1728 av_get_random_seed(), av_get_random_seed());
1729
1730 /* GET requests */
1731 if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ,
1732 &s->interrupt_callback) < 0) {
1733 err = AVERROR(EIO);
1734 goto fail;
1735 }
1736
1737 /* generate GET headers */
1738 snprintf(headers, sizeof(headers),
1739 "x-sessioncookie: %s\r\n"
1740 "Accept: application/x-rtsp-tunnelled\r\n"
1741 "Pragma: no-cache\r\n"
1742 "Cache-Control: no-cache\r\n",
1743 sessioncookie);
1744 av_opt_set(rt->rtsp_hd->priv_data, "headers", headers, 0);
1745
1746 /* complete the connection */
1747 if (ffurl_connect(rt->rtsp_hd, NULL)) {
1748 err = AVERROR(EIO);
1749 goto fail;
1750 }
1751
1752 /* POST requests */
1753 if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE,
1754 &s->interrupt_callback) < 0 ) {
1755 err = AVERROR(EIO);
1756 goto fail;
1757 }
1758
1759 /* generate POST headers */
1760 snprintf(headers, sizeof(headers),
1761 "x-sessioncookie: %s\r\n"
1762 "Content-Type: application/x-rtsp-tunnelled\r\n"
1763 "Pragma: no-cache\r\n"
1764 "Cache-Control: no-cache\r\n"
1765 "Content-Length: 32767\r\n"
1766 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1767 sessioncookie);
1768 av_opt_set(rt->rtsp_hd_out->priv_data, "headers", headers, 0);
1769 av_opt_set(rt->rtsp_hd_out->priv_data, "chunked_post", "0", 0);
1770
1771 /* Initialize the authentication state for the POST session. The HTTP
1772 * protocol implementation doesn't properly handle multi-pass
1773 * authentication for POST requests, since it would require one of
1774 * the following:
1775 * - implementing Expect: 100-continue, which many HTTP servers
1776 * don't support anyway, even less the RTSP servers that do HTTP
1777 * tunneling
1778 * - sending the whole POST data until getting a 401 reply specifying
1779 * what authentication method to use, then resending all that data
1780 * - waiting for potential 401 replies directly after sending the
1781 * POST header (waiting for some unspecified time)
1782 * Therefore, we copy the full auth state, which works for both basic
1783 * and digest. (For digest, we would have to synchronize the nonce
1784 * count variable between the two sessions, if we'd do more requests
1785 * with the original session, though.)
1786 */
1787 ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1788
1789 /* complete the connection */
1790 if (ffurl_connect(rt->rtsp_hd_out, NULL)) {
1791 err = AVERROR(EIO);
1792 goto fail;
1793 }
1794 } else {
1795 /* open the tcp connection */
1796 ff_url_join(tcpname, sizeof(tcpname), lower_rtsp_proto, NULL,
1797 host, port, NULL);
1798 if (ffurl_open(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
1799 &s->interrupt_callback, NULL) < 0) {
1800 err = AVERROR(EIO);
1801 goto fail;
1802 }
1803 rt->rtsp_hd_out = rt->rtsp_hd;
1804 }
1805 rt->seq = 0;
1806
1807 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1808 if (tcp_fd < 0) {
1809 err = tcp_fd;
1810 goto fail;
1811 }
1812 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1813 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1814 NULL, 0, NI_NUMERICHOST);
1815 }
1816
1817 /* request options supported by the server; this also detects server
1818 * type */
1819 for (rt->server_type = RTSP_SERVER_RTP;;) {
1820 cmd[0] = 0;
1821 if (rt->server_type == RTSP_SERVER_REAL)
1822 av_strlcat(cmd,
1823 /*
1824 * The following entries are required for proper
1825 * streaming from a Realmedia server. They are
1826 * interdependent in some way although we currently
1827 * don't quite understand how. Values were copied
1828 * from mplayer SVN r23589.
1829 * ClientChallenge is a 16-byte ID in hex
1830 * CompanyID is a 16-byte ID in base64
1831 */
1832 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1833 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1834 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1835 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1836 sizeof(cmd));
1837 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1838 if (reply->status_code != RTSP_STATUS_OK) {
1839 err = AVERROR_INVALIDDATA;
1840 goto fail;
1841 }
1842
1843 /* detect server type if not standard-compliant RTP */
1844 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1845 rt->server_type = RTSP_SERVER_REAL;
1846 continue;
1847 } else if (!av_strncasecmp(reply->server, "WMServer/", 9)) {
1848 rt->server_type = RTSP_SERVER_WMS;
1849 } else if (rt->server_type == RTSP_SERVER_REAL)
1850 strcpy(real_challenge, reply->real_challenge);
1851 break;
1852 }
1853
1854 if (CONFIG_RTSP_DEMUXER && s->iformat)
1855 err = ff_rtsp_setup_input_streams(s, reply);
1856 else if (CONFIG_RTSP_MUXER)
1857 err = ff_rtsp_setup_output_streams(s, host);
1858 if (err)
1859 goto fail;
1860
1861 do {
1862 int lower_transport = ff_log2_tab[lower_transport_mask &
1863 ~(lower_transport_mask - 1)];
1864
1865 err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1866 rt->server_type == RTSP_SERVER_REAL ?
1867 real_challenge : NULL);
1868 if (err < 0)
1869 goto fail;
1870 lower_transport_mask &= ~(1 << lower_transport);
1871 if (lower_transport_mask == 0 && err == 1) {
1872 err = AVERROR(EPROTONOSUPPORT);
1873 goto fail;
1874 }
1875 } while (err);
1876
1877 rt->lower_transport_mask = lower_transport_mask;
1878 av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1879 rt->state = RTSP_STATE_IDLE;
1880 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1881 return 0;
1882 fail:
1883 ff_rtsp_close_streams(s);
1884 ff_rtsp_close_connections(s);
1885 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1886 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1887 rt->session_id[0] = '\0';
1888 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1889 reply->status_code,
1890 s->filename);
1891 goto redirect;
1892 }
1893 ff_network_close();
1894 return err;
1895 }
1896 #endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1897
1898 #if CONFIG_RTPDEC
1899 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1900 uint8_t *buf, int buf_size, int64_t wait_end)
1901 {
1902 RTSPState *rt = s->priv_data;
1903 RTSPStream *rtsp_st;
1904 int n, i, ret, tcp_fd, timeout_cnt = 0;
1905 int max_p = 0;
1906 struct pollfd *p = rt->p;
1907 int *fds = NULL, fdsnum, fdsidx;
1908
1909 for (;;) {
1910 if (ff_check_interrupt(&s->interrupt_callback))
1911 return AVERROR_EXIT;
1912 if (wait_end && wait_end - av_gettime_relative() < 0)
1913 return AVERROR(EAGAIN);
1914 max_p = 0;
1915 if (rt->rtsp_hd) {
1916 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1917 p[max_p].fd = tcp_fd;
1918 p[max_p++].events = POLLIN;
1919 } else {
1920 tcp_fd = -1;
1921 }
1922 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1923 rtsp_st = rt->rtsp_streams[i];
1924 if (rtsp_st->rtp_handle) {
1925 if (ret = ffurl_get_multi_file_handle(rtsp_st->rtp_handle,
1926 &fds, &fdsnum)) {
1927 av_log(s, AV_LOG_ERROR, "Unable to recover rtp ports\n");
1928 return ret;
1929 }
1930 if (fdsnum != 2) {
1931 av_log(s, AV_LOG_ERROR,
1932 "Number of fds %d not supported\n", fdsnum);
1933 return AVERROR_INVALIDDATA;
1934 }
1935 for (fdsidx = 0; fdsidx < fdsnum; fdsidx++) {
1936 p[max_p].fd = fds[fdsidx];
1937 p[max_p++].events = POLLIN;
1938 }
1939 av_free(fds);
1940 }
1941 }
1942 n = poll(p, max_p, POLL_TIMEOUT_MS);
1943 if (n > 0) {
1944 int j = 1 - (tcp_fd == -1);
1945 timeout_cnt = 0;
1946 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1947 rtsp_st = rt->rtsp_streams[i];
1948 if (rtsp_st->rtp_handle) {
1949 if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
1950 ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size);
1951 if (ret > 0) {
1952 *prtsp_st = rtsp_st;
1953 return ret;
1954 }
1955 }
1956 j+=2;
1957 }
1958 }
1959 #if CONFIG_RTSP_DEMUXER
1960 if (tcp_fd != -1 && p[0].revents & POLLIN) {
1961 if (rt->rtsp_flags & RTSP_FLAG_LISTEN) {
1962 if (rt->state == RTSP_STATE_STREAMING) {
1963 if (!ff_rtsp_parse_streaming_commands(s))
1964 return AVERROR_EOF;
1965 else
1966 av_log(s, AV_LOG_WARNING,
1967 "Unable to answer to TEARDOWN\n");
1968 } else
1969 return 0;
1970 } else {
1971 RTSPMessageHeader reply;
1972 ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1973 if (ret < 0)
1974 return ret;
1975 /* XXX: parse message */
1976 if (rt->state != RTSP_STATE_STREAMING)
1977 return 0;
1978 }
1979 }
1980 #endif
1981 } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1982 return AVERROR(ETIMEDOUT);
1983 } else if (n < 0 && errno != EINTR)
1984 return AVERROR(errno);
1985 }
1986 }
1987
1988 static int pick_stream(AVFormatContext *s, RTSPStream **rtsp_st,
1989 const uint8_t *buf, int len)
1990 {
1991 RTSPState *rt = s->priv_data;
1992 int i;
1993 if (len < 0)
1994 return len;
1995 if (rt->nb_rtsp_streams == 1) {
1996 *rtsp_st = rt->rtsp_streams[0];
1997 return len;
1998 }
1999 if (len >= 8 && rt->transport == RTSP_TRANSPORT_RTP) {
2000 if (RTP_PT_IS_RTCP(rt->recvbuf[1])) {
2001 int no_ssrc = 0;
2002 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2003 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
2004 if (!rtpctx)
2005 continue;
2006 if (rtpctx->ssrc == AV_RB32(&buf[4])) {
2007 *rtsp_st = rt->rtsp_streams[i];
2008 return len;
2009 }
2010 if (!rtpctx->ssrc)
2011 no_ssrc = 1;
2012 }
2013 if (no_ssrc) {
2014 av_log(s, AV_LOG_WARNING,
2015 "Unable to pick stream for packet - SSRC not known for "
2016 "all streams\n");
2017 return AVERROR(EAGAIN);
2018 }
2019 } else {
2020 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2021 if ((buf[1] & 0x7f) == rt->rtsp_streams[i]->sdp_payload_type) {
2022 *rtsp_st = rt->rtsp_streams[i];
2023 return len;
2024 }
2025 }
2026 }
2027 }
2028 av_log(s, AV_LOG_WARNING, "Unable to pick stream for packet\n");
2029 return AVERROR(EAGAIN);
2030 }
2031
2032 int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
2033 {
2034 RTSPState *rt = s->priv_data;
2035 int ret, len;
2036 RTSPStream *rtsp_st, *first_queue_st = NULL;
2037 int64_t wait_end = 0;
2038
2039 if (rt->nb_byes == rt->nb_rtsp_streams)
2040 return AVERROR_EOF;
2041
2042 /* get next frames from the same RTP packet */
2043 if (rt->cur_transport_priv) {
2044 if (rt->transport == RTSP_TRANSPORT_RDT) {
2045 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
2046 } else if (rt->transport == RTSP_TRANSPORT_RTP) {
2047 ret = ff_rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
2048 } else if (CONFIG_RTPDEC && rt->ts) {
2049 ret = ff_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf + rt->recvbuf_pos, rt->recvbuf_len - rt->recvbuf_pos);
2050 if (ret >= 0) {
2051 rt->recvbuf_pos += ret;
2052 ret = rt->recvbuf_pos < rt->recvbuf_len;
2053 }
2054 } else
2055 ret = -1;
2056 if (ret == 0) {
2057 rt->cur_transport_priv = NULL;
2058 return 0;
2059 } else if (ret == 1) {
2060 return 0;
2061 } else
2062 rt->cur_transport_priv = NULL;
2063 }
2064
2065 redo:
2066 if (rt->transport == RTSP_TRANSPORT_RTP) {
2067 int i;
2068 int64_t first_queue_time = 0;
2069 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2070 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
2071 int64_t queue_time;
2072 if (!rtpctx)
2073 continue;
2074 queue_time = ff_rtp_queued_packet_time(rtpctx);
2075 if (queue_time && (queue_time - first_queue_time < 0 ||
2076 !first_queue_time)) {
2077 first_queue_time = queue_time;
2078 first_queue_st = rt->rtsp_streams[i];
2079 }
2080 }
2081 if (first_queue_time) {
2082 wait_end = first_queue_time + s->max_delay;
2083 } else {
2084 wait_end = 0;
2085 first_queue_st = NULL;
2086 }
2087 }
2088
2089 /* read next RTP packet */
2090 if (!rt->recvbuf) {
2091 rt->recvbuf = av_malloc(RECVBUF_SIZE);
2092 if (!rt->recvbuf)
2093 return AVERROR(ENOMEM);
2094 }
2095
2096 switch(rt->lower_transport) {
2097 default:
2098 #if CONFIG_RTSP_DEMUXER
2099 case RTSP_LOWER_TRANSPORT_TCP:
2100 len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
2101 break;
2102 #endif
2103 case RTSP_LOWER_TRANSPORT_UDP:
2104 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
2105 len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
2106 if (len > 0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
2107 ff_rtp_check_and_send_back_rr(rtsp_st->transport_priv, rtsp_st->rtp_handle, NULL, len);
2108 break;
2109 case RTSP_LOWER_TRANSPORT_CUSTOM:
2110 if (first_queue_st && rt->transport == RTSP_TRANSPORT_RTP &&
2111 wait_end && wait_end < av_gettime_relative())
2112 len = AVERROR(EAGAIN);
2113 else
2114 len = ffio_read_partial(s->pb, rt->recvbuf, RECVBUF_SIZE);
2115 len = pick_stream(s, &rtsp_st, rt->recvbuf, len);
2116 if (len > 0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
2117 ff_rtp_check_and_send_back_rr(rtsp_st->transport_priv, NULL, s->pb, len);
2118 break;
2119 }
2120 if (len == AVERROR(EAGAIN) && first_queue_st &&
2121 rt->transport == RTSP_TRANSPORT_RTP) {
2122 av_log(s, AV_LOG_WARNING,
2123 "max delay reached. need to consume packet\n");
2124 rtsp_st = first_queue_st;
2125 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
2126 goto end;
2127 }
2128 if (len < 0)
2129 return len;
2130 if (len == 0)
2131 return AVERROR_EOF;
2132 if (rt->transport == RTSP_TRANSPORT_RDT) {
2133 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2134 } else if (rt->transport == RTSP_TRANSPORT_RTP) {
2135 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2136 if (rtsp_st->feedback) {
2137 AVIOContext *pb = NULL;
2138 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_CUSTOM)
2139 pb = s->pb;
2140 ff_rtp_send_rtcp_feedback(rtsp_st->transport_priv, rtsp_st->rtp_handle, pb);
2141 }
2142 if (ret < 0) {
2143 /* Either bad packet, or a RTCP packet. Check if the
2144 * first_rtcp_ntp_time field was initialized. */
2145 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
2146 if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
2147 /* first_rtcp_ntp_time has been initialized for this stream,
2148 * copy the same value to all other uninitialized streams,
2149 * in order to map their timestamp origin to the same ntp time
2150 * as this one. */
2151 int i;
2152 AVStream *st = NULL;
2153 if (rtsp_st->stream_index >= 0)
2154 st = s->streams[rtsp_st->stream_index];
2155 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2156 RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
2157 AVStream *st2 = NULL;
2158 if (rt->rtsp_streams[i]->stream_index >= 0)
2159 st2 = s->streams[rt->rtsp_streams[i]->stream_index];
2160 if (rtpctx2 && st && st2 &&
2161 rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
2162 rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
2163 rtpctx2->rtcp_ts_offset = av_rescale_q(
2164 rtpctx->rtcp_ts_offset, st->time_base,
2165 st2->time_base);
2166 }
2167 }
2168 }
2169 if (ret == -RTCP_BYE) {
2170 rt->nb_byes++;
2171
2172 av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
2173 rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
2174
2175 if (rt->nb_byes == rt->nb_rtsp_streams)
2176 return AVERROR_EOF;
2177 }
2178 }
2179 } else if (CONFIG_RTPDEC && rt->ts) {
2180 ret = ff_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf, len);
2181 if (ret >= 0) {
2182 if (ret < len) {
2183 rt->recvbuf_len = len;
2184 rt->recvbuf_pos = ret;
2185 rt->cur_transport_priv = rt->ts;
2186 return 1;
2187 } else {
2188 ret = 0;
2189 }
2190 }
2191 } else {
2192 return AVERROR_INVALIDDATA;
2193 }
2194 end:
2195 if (ret < 0)
2196 goto redo;
2197 if (ret == 1)
2198 /* more packets may follow, so we save the RTP context */
2199 rt->cur_transport_priv = rtsp_st->transport_priv;
2200
2201 return ret;
2202 }
2203 #endif /* CONFIG_RTPDEC */
2204
2205 #if CONFIG_SDP_DEMUXER
2206 static int sdp_probe(AVProbeData *p1)
2207 {
2208 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
2209
2210 /* we look for a line beginning "c=IN IP" */
2211 while (p < p_end && *p != '\0') {
2212 if (p + sizeof("c=IN IP") - 1 < p_end &&
2213 av_strstart(p, "c=IN IP", NULL))
2214 return AVPROBE_SCORE_EXTENSION;
2215
2216 while (p < p_end - 1 && *p != '\n') p++;
2217 if (++p >= p_end)
2218 break;
2219 if (*p == '\r')
2220 p++;
2221 }
2222 return 0;
2223 }
2224
2225 static void append_source_addrs(char *buf, int size, const char *name,
2226 int count, struct RTSPSource **addrs)
2227 {
2228 int i;
2229 if (!count)
2230 return;
2231 av_strlcatf(buf, size, "&%s=%s", name, addrs[0]->addr);
2232 for (i = 1; i < count; i++)
2233 av_strlcatf(buf, size, ",%s", addrs[i]->addr);
2234 }
2235
2236 static int sdp_read_header(AVFormatContext *s)
2237 {
2238 RTSPState *rt = s->priv_data;
2239 RTSPStream *rtsp_st;
2240 int size, i, err;
2241 char *content;
2242 char url[1024];
2243
2244 if (!ff_network_init())
2245 return AVERROR(EIO);
2246
2247 if (s->max_delay < 0) /* Not set by the caller */
2248 s->max_delay = DEFAULT_REORDERING_DELAY;
2249 if (rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)
2250 rt->lower_transport = RTSP_LOWER_TRANSPORT_CUSTOM;
2251
2252 /* read the whole sdp file */
2253 /* XXX: better loading */
2254 content = av_malloc(SDP_MAX_SIZE);
2255 if (!content)
2256 return AVERROR(ENOMEM);
2257 size = avio_read(s->pb, content, SDP_MAX_SIZE - 1);
2258 if (size <= 0) {
2259 av_free(content);
2260 return AVERROR_INVALIDDATA;
2261 }
2262 content[size] ='\0';
2263
2264 err = ff_sdp_parse(s, content);
2265 av_free(content);
2266 if (err) goto fail;
2267
2268 /* open each RTP stream */
2269 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2270 char namebuf[50];
2271 rtsp_st = rt->rtsp_streams[i];
2272
2273 if (!(rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)) {
2274 AVDictionary *opts = map_to_opts(rt);
2275
2276 err = getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip,
2277 sizeof(rtsp_st->sdp_ip),
2278 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
2279 if (err) {
2280 av_log(s, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(err));
2281 err = AVERROR(EIO);
2282 goto fail;
2283 }
2284 ff_url_join(url, sizeof(url), "rtp", NULL,
2285 namebuf, rtsp_st->sdp_port,
2286 "?localport=%d&ttl=%d&connect=%d&write_to_source=%d",
2287 rtsp_st->sdp_port, rtsp_st->sdp_ttl,
2288 rt->rtsp_flags & RTSP_FLAG_FILTER_SRC ? 1 : 0,
2289 rt->rtsp_flags & RTSP_FLAG_RTCP_TO_SOURCE ? 1 : 0);
2290
2291 append_source_addrs(url, sizeof(url), "sources",
2292 rtsp_st->nb_include_source_addrs,
2293 rtsp_st->include_source_addrs);
2294 append_source_addrs(url, sizeof(url), "block",
2295 rtsp_st->nb_exclude_source_addrs,
2296 rtsp_st->exclude_source_addrs);
2297 err = ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
2298 &s->interrupt_callback, &opts);
2299
2300 av_dict_free(&opts);
2301
2302 if (err < 0) {
2303 err = AVERROR_INVALIDDATA;
2304 goto fail;
2305 }
2306 }
2307 if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
2308 goto fail;
2309 }
2310 return 0;
2311 fail:
2312 ff_rtsp_close_streams(s);
2313 ff_network_close();
2314 return err;
2315 }
2316
2317 static int sdp_read_close(AVFormatContext *s)
2318 {
2319 ff_rtsp_close_streams(s);
2320 ff_network_close();
2321 return 0;
2322 }
2323
2324 static const AVClass sdp_demuxer_class = {
2325 .class_name = "SDP demuxer",
2326 .item_name = av_default_item_name,
2327 .option = sdp_options,
2328 .version = LIBAVUTIL_VERSION_INT,
2329 };
2330
2331 AVInputFormat ff_sdp_demuxer = {
2332 .name = "sdp",
2333 .long_name = NULL_IF_CONFIG_SMALL("SDP"),
2334 .priv_data_size = sizeof(RTSPState),
2335 .read_probe = sdp_probe,
2336 .read_header = sdp_read_header,
2337 .read_packet = ff_rtsp_fetch_packet,
2338 .read_close = sdp_read_close,
2339 .priv_class = &sdp_demuxer_class,
2340 };
2341 #endif /* CONFIG_SDP_DEMUXER */
2342
2343 #if CONFIG_RTP_DEMUXER
2344 static int rtp_probe(AVProbeData *p)
2345 {
2346 if (av_strstart(p->filename, "rtp:", NULL))
2347 return AVPROBE_SCORE_MAX;
2348 return 0;
2349 }
2350
2351 static int rtp_read_header(AVFormatContext *s)
2352 {
2353 uint8_t recvbuf[RTP_MAX_PACKET_LENGTH];
2354 char host[500], sdp[500];
2355 int ret, port;
2356 URLContext* in = NULL;
2357 int payload_type;
2358 AVCodecContext codec = { 0 };
2359 struct sockaddr_storage addr;
2360 AVIOContext pb;
2361 socklen_t addrlen = sizeof(addr);
2362 RTSPState *rt = s->priv_data;
2363
2364 if (!ff_network_init())
2365 return AVERROR(EIO);
2366
2367 ret = ffurl_open(&in, s->filename, AVIO_FLAG_READ,
2368 &s->interrupt_callback, NULL);
2369 if (ret)
2370 goto fail;
2371
2372 while (1) {
2373 ret = ffurl_read(in, recvbuf, sizeof(recvbuf));
2374 if (ret == AVERROR(EAGAIN))
2375 continue;
2376 if (ret < 0)
2377 goto fail;
2378 if (ret < 12) {
2379 av_log(s, AV_LOG_WARNING, "Received too short packet\n");
2380 continue;
2381 }
2382
2383 if ((recvbuf[0] & 0xc0) != 0x80) {
2384 av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
2385 "received\n");
2386 continue;
2387 }
2388
2389 if (RTP_PT_IS_RTCP(recvbuf[1]))
2390 continue;
2391
2392 payload_type = recvbuf[1] & 0x7f;
2393 break;
2394 }
2395 getsockname(ffurl_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
2396 ffurl_close(in);
2397 in = NULL;
2398
2399 if (ff_rtp_get_codec_info(&codec, payload_type)) {
2400 av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
2401 "without an SDP file describing it\n",
2402 payload_type);
2403 goto fail;
2404 }
2405 if (codec.codec_type != AVMEDIA_TYPE_DATA) {
2406 av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
2407 "properly you need an SDP file "
2408 "describing it\n");
2409 }
2410
2411 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
2412 NULL, 0, s->filename);
2413
2414 snprintf(sdp, sizeof(sdp),
2415 "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
2416 addr.ss_family == AF_INET ? 4 : 6, host,
2417 codec.codec_type == AVMEDIA_TYPE_DATA ? "application" :
2418 codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
2419 port, payload_type);
2420 av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
2421
2422 ffio_init_context(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
2423 s->pb = &pb;
2424
2425 /* sdp_read_header initializes this again */
2426 ff_network_close();
2427
2428 rt->media_type_mask = (1 << (AVMEDIA_TYPE_DATA+1)) - 1;
2429
2430 ret = sdp_read_header(s);
2431 s->pb = NULL;
2432 return ret;
2433
2434 fail:
2435 if (in)
2436 ffurl_close(in);
2437 ff_network_close();
2438 return ret;
2439 }
2440
2441 static const AVClass rtp_demuxer_class = {
2442 .class_name = "RTP demuxer",
2443 .item_name = av_default_item_name,
2444 .option = rtp_options,
2445 .version = LIBAVUTIL_VERSION_INT,
2446 };
2447
2448 AVInputFormat ff_rtp_demuxer = {
2449 .name = "rtp",
2450 .long_name = NULL_IF_CONFIG_SMALL("RTP input"),
2451 .priv_data_size = sizeof(RTSPState),
2452 .read_probe = rtp_probe,
2453 .read_header = rtp_read_header,
2454 .read_packet = ff_rtsp_fetch_packet,
2455 .read_close = sdp_read_close,
2456 .flags = AVFMT_NOFILE,
2457 .priv_class = &rtp_demuxer_class,
2458 };
2459 #endif /* CONFIG_RTP_DEMUXER */