rtsp: Lazily set up the pollfd array once
[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 AVCodecParameters *par = st ? st->codecpar : NULL;
204 if (!handler)
205 return;
206 if (par)
207 par->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 AVCodecParameters *par = st->codecpar;
243 char buf[256];
244 int i;
245 const AVCodecDescriptor *desc;
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 par->codec_id = ff_rtp_codec_id(buf, par->codec_type);
257 }
258
259 if (par->codec_id == AV_CODEC_ID_NONE) {
260 RTPDynamicProtocolHandler *handler =
261 ff_rtp_handler_find_by_name(buf, par->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 par->codec_id = ff_rtp_codec_id(buf, par->codec_type);
269 }
270
271 desc = avcodec_descriptor_get(par->codec_id);
272 if (desc && desc->name)
273 c_name = desc->name;
274 else
275 c_name = "(null)";
276
277 get_word_sep(buf, sizeof(buf), "/", &p);
278 i = atoi(buf);
279 switch (par->codec_type) {
280 case AVMEDIA_TYPE_AUDIO:
281 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
282 par->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
283 par->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
284 if (i > 0) {
285 par->sample_rate = i;
286 avpriv_set_pts_info(st, 32, 1, par->sample_rate);
287 get_word_sep(buf, sizeof(buf), "/", &p);
288 i = atoi(buf);
289 if (i > 0)
290 par->channels = i;
291 }
292 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
293 par->sample_rate);
294 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
295 par->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->codecpar->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->codecpar, rtsp_st->sdp_payload_type);
503 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
504 st->codecpar->sample_rate > 0)
505 avpriv_set_pts_info(st, 32, 1, st->codecpar->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->codecpar->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, "ssrc:", &p) && s->nb_streams > 0) {
569 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
570 get_word(buf1, sizeof(buf1), &p);
571 rtsp_st->ssrc = strtoll(buf1, NULL, 10);
572 } else if (av_strstart(p, "range:", &p)) {
573 int64_t start, end;
574
575 // this is so that seeking on a streamed file can work.
576 rtsp_parse_range_npt(p, &start, &end);
577 s->start_time = start;
578 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
579 s->duration = (end == AV_NOPTS_VALUE) ?
580 AV_NOPTS_VALUE : end - start;
581 } else if (av_strstart(p, "lang:", &p)) {
582 if (s->nb_streams > 0) {
583 get_word(buf1, sizeof(buf1), &p);
584 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
585 if (rtsp_st->stream_index >= 0) {
586 st = s->streams[rtsp_st->stream_index];
587 av_dict_set(&st->metadata, "language", buf1, 0);
588 }
589 } else
590 get_word(rt->default_lang, sizeof(rt->default_lang), &p);
591 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
592 if (atoi(p) == 1)
593 rt->transport = RTSP_TRANSPORT_RDT;
594 } else if (av_strstart(p, "SampleRate:integer;", &p) &&
595 s->nb_streams > 0) {
596 st = s->streams[s->nb_streams - 1];
597 st->codecpar->sample_rate = atoi(p);
598 } else if (av_strstart(p, "crypto:", &p) && s->nb_streams > 0) {
599 // RFC 4568
600 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
601 get_word(buf1, sizeof(buf1), &p); // ignore tag
602 get_word(rtsp_st->crypto_suite, sizeof(rtsp_st->crypto_suite), &p);
603 p += strspn(p, SPACE_CHARS);
604 if (av_strstart(p, "inline:", &p))
605 get_word(rtsp_st->crypto_params, sizeof(rtsp_st->crypto_params), &p);
606 } else if (av_strstart(p, "source-filter:", &p)) {
607 int exclude = 0;
608 get_word(buf1, sizeof(buf1), &p);
609 if (strcmp(buf1, "incl") && strcmp(buf1, "excl"))
610 return;
611 exclude = !strcmp(buf1, "excl");
612
613 get_word(buf1, sizeof(buf1), &p);
614 if (strcmp(buf1, "IN") != 0)
615 return;
616 get_word(buf1, sizeof(buf1), &p);
617 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6") && strcmp(buf1, "*"))
618 return;
619 // not checking that the destination address actually matches or is wildcard
620 get_word(buf1, sizeof(buf1), &p);
621
622 while (*p != '\0') {
623 rtsp_src = av_mallocz(sizeof(*rtsp_src));
624 if (!rtsp_src)
625 return;
626 get_word(rtsp_src->addr, sizeof(rtsp_src->addr), &p);
627 if (exclude) {
628 if (s->nb_streams == 0) {
629 dynarray_add(&s1->default_exclude_source_addrs, &s1->nb_default_exclude_source_addrs, rtsp_src);
630 } else {
631 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
632 dynarray_add(&rtsp_st->exclude_source_addrs, &rtsp_st->nb_exclude_source_addrs, rtsp_src);
633 }
634 } else {
635 if (s->nb_streams == 0) {
636 dynarray_add(&s1->default_include_source_addrs, &s1->nb_default_include_source_addrs, rtsp_src);
637 } else {
638 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
639 dynarray_add(&rtsp_st->include_source_addrs, &rtsp_st->nb_include_source_addrs, rtsp_src);
640 }
641 }
642 }
643 } else {
644 if (rt->server_type == RTSP_SERVER_WMS)
645 ff_wms_parse_sdp_a_line(s, p);
646 if (s->nb_streams > 0) {
647 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
648
649 if (rt->server_type == RTSP_SERVER_REAL)
650 ff_real_parse_sdp_a_line(s, rtsp_st->stream_index, p);
651
652 if (rtsp_st->dynamic_handler &&
653 rtsp_st->dynamic_handler->parse_sdp_a_line)
654 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
655 rtsp_st->stream_index,
656 rtsp_st->dynamic_protocol_context, buf);
657 }
658 }
659 break;
660 }
661 }
662
663 int ff_sdp_parse(AVFormatContext *s, const char *content)
664 {
665 const char *p;
666 int letter, i;
667 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
668 * contain long SDP lines containing complete ASF Headers (several
669 * kB) or arrays of MDPR (RM stream descriptor) headers plus
670 * "rulebooks" describing their properties. Therefore, the SDP line
671 * buffer is large.
672 *
673 * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
674 * in rtpdec_xiph.c. */
675 char buf[16384], *q;
676 SDPParseState sdp_parse_state = { { 0 } }, *s1 = &sdp_parse_state;
677
678 p = content;
679 for (;;) {
680 p += strspn(p, SPACE_CHARS);
681 letter = *p;
682 if (letter == '\0')
683 break;
684 p++;
685 if (*p != '=')
686 goto next_line;
687 p++;
688 /* get the content */
689 q = buf;
690 while (*p != '\n' && *p != '\r' && *p != '\0') {
691 if ((q - buf) < sizeof(buf) - 1)
692 *q++ = *p;
693 p++;
694 }
695 *q = '\0';
696 sdp_parse_line(s, s1, letter, buf);
697 next_line:
698 while (*p != '\n' && *p != '\0')
699 p++;
700 if (*p == '\n')
701 p++;
702 }
703
704 for (i = 0; i < s1->nb_default_include_source_addrs; i++)
705 av_free(s1->default_include_source_addrs[i]);
706 av_freep(&s1->default_include_source_addrs);
707 for (i = 0; i < s1->nb_default_exclude_source_addrs; i++)
708 av_free(s1->default_exclude_source_addrs[i]);
709 av_freep(&s1->default_exclude_source_addrs);
710
711 return 0;
712 }
713 #endif /* CONFIG_RTPDEC */
714
715 void ff_rtsp_undo_setup(AVFormatContext *s, int send_packets)
716 {
717 RTSPState *rt = s->priv_data;
718 int i;
719
720 for (i = 0; i < rt->nb_rtsp_streams; i++) {
721 RTSPStream *rtsp_st = rt->rtsp_streams[i];
722 if (!rtsp_st)
723 continue;
724 if (rtsp_st->transport_priv) {
725 if (s->oformat) {
726 AVFormatContext *rtpctx = rtsp_st->transport_priv;
727 av_write_trailer(rtpctx);
728 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
729 if (CONFIG_RTSP_MUXER && rtpctx->pb && send_packets)
730 ff_rtsp_tcp_write_packet(s, rtsp_st);
731 ffio_free_dyn_buf(&rtpctx->pb);
732 } else {
733 avio_close(rtpctx->pb);
734 }
735 avformat_free_context(rtpctx);
736 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT)
737 ff_rdt_parse_close(rtsp_st->transport_priv);
738 else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP)
739 ff_rtp_parse_close(rtsp_st->transport_priv);
740 }
741 rtsp_st->transport_priv = NULL;
742 if (rtsp_st->rtp_handle)
743 ffurl_close(rtsp_st->rtp_handle);
744 rtsp_st->rtp_handle = NULL;
745 }
746 }
747
748 /* close and free RTSP streams */
749 void ff_rtsp_close_streams(AVFormatContext *s)
750 {
751 RTSPState *rt = s->priv_data;
752 int i, j;
753 RTSPStream *rtsp_st;
754
755 ff_rtsp_undo_setup(s, 0);
756 for (i = 0; i < rt->nb_rtsp_streams; i++) {
757 rtsp_st = rt->rtsp_streams[i];
758 if (rtsp_st) {
759 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context) {
760 if (rtsp_st->dynamic_handler->close)
761 rtsp_st->dynamic_handler->close(
762 rtsp_st->dynamic_protocol_context);
763 av_free(rtsp_st->dynamic_protocol_context);
764 }
765 for (j = 0; j < rtsp_st->nb_include_source_addrs; j++)
766 av_free(rtsp_st->include_source_addrs[j]);
767 av_freep(&rtsp_st->include_source_addrs);
768 for (j = 0; j < rtsp_st->nb_exclude_source_addrs; j++)
769 av_free(rtsp_st->exclude_source_addrs[j]);
770 av_freep(&rtsp_st->exclude_source_addrs);
771
772 av_free(rtsp_st);
773 }
774 }
775 av_free(rt->rtsp_streams);
776 if (rt->asf_ctx) {
777 avformat_close_input(&rt->asf_ctx);
778 }
779 if (CONFIG_RTPDEC && rt->ts)
780 ff_mpegts_parse_close(rt->ts);
781 av_freep(&rt->protocols);
782 av_free(rt->p);
783 av_free(rt->recvbuf);
784 }
785
786 int ff_rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
787 {
788 RTSPState *rt = s->priv_data;
789 AVStream *st = NULL;
790 int reordering_queue_size = rt->reordering_queue_size;
791 if (reordering_queue_size < 0) {
792 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
793 reordering_queue_size = 0;
794 else
795 reordering_queue_size = RTP_REORDER_QUEUE_DEFAULT_SIZE;
796 }
797
798 /* open the RTP context */
799 if (rtsp_st->stream_index >= 0)
800 st = s->streams[rtsp_st->stream_index];
801 if (!st)
802 s->ctx_flags |= AVFMTCTX_NOHEADER;
803
804 if (CONFIG_RTSP_MUXER && s->oformat) {
805 int ret = ff_rtp_chain_mux_open((AVFormatContext **)&rtsp_st->transport_priv,
806 s, st, rtsp_st->rtp_handle,
807 RTSP_TCP_MAX_PACKET_SIZE,
808 rtsp_st->stream_index);
809 /* Ownership of rtp_handle is passed to the rtp mux context */
810 rtsp_st->rtp_handle = NULL;
811 if (ret < 0)
812 return ret;
813 st->time_base = ((AVFormatContext*)rtsp_st->transport_priv)->streams[0]->time_base;
814 } else if (rt->transport == RTSP_TRANSPORT_RAW) {
815 return 0; // Don't need to open any parser here
816 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT)
817 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
818 rtsp_st->dynamic_protocol_context,
819 rtsp_st->dynamic_handler);
820 else if (CONFIG_RTPDEC)
821 rtsp_st->transport_priv = ff_rtp_parse_open(s, st,
822 rtsp_st->sdp_payload_type,
823 reordering_queue_size);
824
825 if (!rtsp_st->transport_priv) {
826 return AVERROR(ENOMEM);
827 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP &&
828 s->iformat) {
829 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
830 rtpctx->ssrc = rtsp_st->ssrc;
831 if (rtsp_st->dynamic_handler) {
832 ff_rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
833 rtsp_st->dynamic_protocol_context,
834 rtsp_st->dynamic_handler);
835 }
836 if (rtsp_st->crypto_suite[0])
837 ff_rtp_parse_set_crypto(rtsp_st->transport_priv,
838 rtsp_st->crypto_suite,
839 rtsp_st->crypto_params);
840 }
841
842 return 0;
843 }
844
845 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
846 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
847 {
848 const char *q;
849 char *p;
850 int v;
851
852 q = *pp;
853 q += strspn(q, SPACE_CHARS);
854 v = strtol(q, &p, 10);
855 if (*p == '-') {
856 p++;
857 *min_ptr = v;
858 v = strtol(p, &p, 10);
859 *max_ptr = v;
860 } else {
861 *min_ptr = v;
862 *max_ptr = v;
863 }
864 *pp = p;
865 }
866
867 /* XXX: only one transport specification is parsed */
868 static void rtsp_parse_transport(AVFormatContext *s,
869 RTSPMessageHeader *reply, const char *p)
870 {
871 char transport_protocol[16];
872 char profile[16];
873 char lower_transport[16];
874 char parameter[16];
875 RTSPTransportField *th;
876 char buf[256];
877
878 reply->nb_transports = 0;
879
880 for (;;) {
881 p += strspn(p, SPACE_CHARS);
882 if (*p == '\0')
883 break;
884
885 th = &reply->transports[reply->nb_transports];
886
887 get_word_sep(transport_protocol, sizeof(transport_protocol),
888 "/", &p);
889 if (!av_strcasecmp (transport_protocol, "rtp")) {
890 get_word_sep(profile, sizeof(profile), "/;,", &p);
891 lower_transport[0] = '\0';
892 /* rtp/avp/<protocol> */
893 if (*p == '/') {
894 get_word_sep(lower_transport, sizeof(lower_transport),
895 ";,", &p);
896 }
897 th->transport = RTSP_TRANSPORT_RTP;
898 } else if (!av_strcasecmp (transport_protocol, "x-pn-tng") ||
899 !av_strcasecmp (transport_protocol, "x-real-rdt")) {
900 /* x-pn-tng/<protocol> */
901 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
902 profile[0] = '\0';
903 th->transport = RTSP_TRANSPORT_RDT;
904 } else if (!av_strcasecmp(transport_protocol, "raw")) {
905 get_word_sep(profile, sizeof(profile), "/;,", &p);
906 lower_transport[0] = '\0';
907 /* raw/raw/<protocol> */
908 if (*p == '/') {
909 get_word_sep(lower_transport, sizeof(lower_transport),
910 ";,", &p);
911 }
912 th->transport = RTSP_TRANSPORT_RAW;
913 }
914 if (!av_strcasecmp(lower_transport, "TCP"))
915 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
916 else
917 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
918
919 if (*p == ';')
920 p++;
921 /* get each parameter */
922 while (*p != '\0' && *p != ',') {
923 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
924 if (!strcmp(parameter, "port")) {
925 if (*p == '=') {
926 p++;
927 rtsp_parse_range(&th->port_min, &th->port_max, &p);
928 }
929 } else if (!strcmp(parameter, "client_port")) {
930 if (*p == '=') {
931 p++;
932 rtsp_parse_range(&th->client_port_min,
933 &th->client_port_max, &p);
934 }
935 } else if (!strcmp(parameter, "server_port")) {
936 if (*p == '=') {
937 p++;
938 rtsp_parse_range(&th->server_port_min,
939 &th->server_port_max, &p);
940 }
941 } else if (!strcmp(parameter, "interleaved")) {
942 if (*p == '=') {
943 p++;
944 rtsp_parse_range(&th->interleaved_min,
945 &th->interleaved_max, &p);
946 }
947 } else if (!strcmp(parameter, "multicast")) {
948 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
949 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
950 } else if (!strcmp(parameter, "ttl")) {
951 if (*p == '=') {
952 char *end;
953 p++;
954 th->ttl = strtol(p, &end, 10);
955 p = end;
956 }
957 } else if (!strcmp(parameter, "destination")) {
958 if (*p == '=') {
959 p++;
960 get_word_sep(buf, sizeof(buf), ";,", &p);
961 get_sockaddr(s, buf, &th->destination);
962 }
963 } else if (!strcmp(parameter, "source")) {
964 if (*p == '=') {
965 p++;
966 get_word_sep(buf, sizeof(buf), ";,", &p);
967 av_strlcpy(th->source, buf, sizeof(th->source));
968 }
969 } else if (!strcmp(parameter, "mode")) {
970 if (*p == '=') {
971 p++;
972 get_word_sep(buf, sizeof(buf), ";, ", &p);
973 if (!strcmp(buf, "record") ||
974 !strcmp(buf, "receive"))
975 th->mode_record = 1;
976 }
977 }
978
979 while (*p != ';' && *p != '\0' && *p != ',')
980 p++;
981 if (*p == ';')
982 p++;
983 }
984 if (*p == ',')
985 p++;
986
987 reply->nb_transports++;
988 if (reply->nb_transports >= RTSP_MAX_TRANSPORTS)
989 break;
990 }
991 }
992
993 static void handle_rtp_info(RTSPState *rt, const char *url,
994 uint32_t seq, uint32_t rtptime)
995 {
996 int i;
997 if (!rtptime || !url[0])
998 return;
999 if (rt->transport != RTSP_TRANSPORT_RTP)
1000 return;
1001 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1002 RTSPStream *rtsp_st = rt->rtsp_streams[i];
1003 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1004 if (!rtpctx)
1005 continue;
1006 if (!strcmp(rtsp_st->control_url, url)) {
1007 rtpctx->base_timestamp = rtptime;
1008 break;
1009 }
1010 }
1011 }
1012
1013 static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
1014 {
1015 int read = 0;
1016 char key[20], value[1024], url[1024] = "";
1017 uint32_t seq = 0, rtptime = 0;
1018
1019 for (;;) {
1020 p += strspn(p, SPACE_CHARS);
1021 if (!*p)
1022 break;
1023 get_word_sep(key, sizeof(key), "=", &p);
1024 if (*p != '=')
1025 break;
1026 p++;
1027 get_word_sep(value, sizeof(value), ";, ", &p);
1028 read++;
1029 if (!strcmp(key, "url"))
1030 av_strlcpy(url, value, sizeof(url));
1031 else if (!strcmp(key, "seq"))
1032 seq = strtoul(value, NULL, 10);
1033 else if (!strcmp(key, "rtptime"))
1034 rtptime = strtoul(value, NULL, 10);
1035 if (*p == ',') {
1036 handle_rtp_info(rt, url, seq, rtptime);
1037 url[0] = '\0';
1038 seq = rtptime = 0;
1039 read = 0;
1040 }
1041 if (*p)
1042 p++;
1043 }
1044 if (read > 0)
1045 handle_rtp_info(rt, url, seq, rtptime);
1046 }
1047
1048 void ff_rtsp_parse_line(AVFormatContext *s,
1049 RTSPMessageHeader *reply, const char *buf,
1050 RTSPState *rt, const char *method)
1051 {
1052 const char *p;
1053
1054 /* NOTE: we do case independent match for broken servers */
1055 p = buf;
1056 if (av_stristart(p, "Session:", &p)) {
1057 int t;
1058 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
1059 if (av_stristart(p, ";timeout=", &p) &&
1060 (t = strtol(p, NULL, 10)) > 0) {
1061 reply->timeout = t;
1062 }
1063 } else if (av_stristart(p, "Content-Length:", &p)) {
1064 reply->content_length = strtol(p, NULL, 10);
1065 } else if (av_stristart(p, "Transport:", &p)) {
1066 rtsp_parse_transport(s, reply, p);
1067 } else if (av_stristart(p, "CSeq:", &p)) {
1068 reply->seq = strtol(p, NULL, 10);
1069 } else if (av_stristart(p, "Range:", &p)) {
1070 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
1071 } else if (av_stristart(p, "RealChallenge1:", &p)) {
1072 p += strspn(p, SPACE_CHARS);
1073 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
1074 } else if (av_stristart(p, "Server:", &p)) {
1075 p += strspn(p, SPACE_CHARS);
1076 av_strlcpy(reply->server, p, sizeof(reply->server));
1077 } else if (av_stristart(p, "Notice:", &p) ||
1078 av_stristart(p, "X-Notice:", &p)) {
1079 reply->notice = strtol(p, NULL, 10);
1080 } else if (av_stristart(p, "Location:", &p)) {
1081 p += strspn(p, SPACE_CHARS);
1082 av_strlcpy(reply->location, p , sizeof(reply->location));
1083 } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
1084 p += strspn(p, SPACE_CHARS);
1085 ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
1086 } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
1087 p += strspn(p, SPACE_CHARS);
1088 ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
1089 } else if (av_stristart(p, "Content-Base:", &p) && rt) {
1090 p += strspn(p, SPACE_CHARS);
1091 if (method && !strcmp(method, "DESCRIBE"))
1092 av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
1093 } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
1094 p += strspn(p, SPACE_CHARS);
1095 if (method && !strcmp(method, "PLAY"))
1096 rtsp_parse_rtp_info(rt, p);
1097 } else if (av_stristart(p, "Public:", &p) && rt) {
1098 if (strstr(p, "GET_PARAMETER") &&
1099 method && !strcmp(method, "OPTIONS"))
1100 rt->get_parameter_supported = 1;
1101 } else if (av_stristart(p, "x-Accept-Dynamic-Rate:", &p) && rt) {
1102 p += strspn(p, SPACE_CHARS);
1103 rt->accept_dynamic_rate = atoi(p);
1104 } else if (av_stristart(p, "Content-Type:", &p)) {
1105 p += strspn(p, SPACE_CHARS);
1106 av_strlcpy(reply->content_type, p, sizeof(reply->content_type));
1107 }
1108 }
1109
1110 /* skip a RTP/TCP interleaved packet */
1111 void ff_rtsp_skip_packet(AVFormatContext *s)
1112 {
1113 RTSPState *rt = s->priv_data;
1114 int ret, len, len1;
1115 uint8_t buf[1024];
1116
1117 ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
1118 if (ret != 3)
1119 return;
1120 len = AV_RB16(buf + 1);
1121
1122 av_log(s, AV_LOG_TRACE, "skipping RTP packet len=%d\n", len);
1123
1124 /* skip payload */
1125 while (len > 0) {
1126 len1 = len;
1127 if (len1 > sizeof(buf))
1128 len1 = sizeof(buf);
1129 ret = ffurl_read_complete(rt->rtsp_hd, buf, len1);
1130 if (ret != len1)
1131 return;
1132 len -= len1;
1133 }
1134 }
1135
1136 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
1137 unsigned char **content_ptr,
1138 int return_on_interleaved_data, const char *method)
1139 {
1140 RTSPState *rt = s->priv_data;
1141 char buf[4096], buf1[1024], *q;
1142 unsigned char ch;
1143 const char *p;
1144 int ret, content_length, line_count = 0, request = 0;
1145 unsigned char *content = NULL;
1146
1147 start:
1148 line_count = 0;
1149 request = 0;
1150 content = NULL;
1151 memset(reply, 0, sizeof(*reply));
1152
1153 /* parse reply (XXX: use buffers) */
1154 rt->last_reply[0] = '\0';
1155 for (;;) {
1156 q = buf;
1157 for (;;) {
1158 ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1);
1159 av_log(s, AV_LOG_TRACE, "ret=%d c=%02x [%c]\n", ret, ch, ch);
1160 if (ret != 1)
1161 return AVERROR_EOF;
1162 if (ch == '\n')
1163 break;
1164 if (ch == '$' && q == buf) {
1165 if (return_on_interleaved_data) {
1166 return 1;
1167 } else
1168 ff_rtsp_skip_packet(s);
1169 } else if (ch != '\r') {
1170 if ((q - buf) < sizeof(buf) - 1)
1171 *q++ = ch;
1172 }
1173 }
1174 *q = '\0';
1175
1176 av_log(s, AV_LOG_TRACE, "line='%s'\n", buf);
1177
1178 /* test if last line */
1179 if (buf[0] == '\0')
1180 break;
1181 p = buf;
1182 if (line_count == 0) {
1183 /* get reply code */
1184 get_word(buf1, sizeof(buf1), &p);
1185 if (!strncmp(buf1, "RTSP/", 5)) {
1186 get_word(buf1, sizeof(buf1), &p);
1187 reply->status_code = atoi(buf1);
1188 av_strlcpy(reply->reason, p, sizeof(reply->reason));
1189 } else {
1190 av_strlcpy(reply->reason, buf1, sizeof(reply->reason)); // method
1191 get_word(buf1, sizeof(buf1), &p); // object
1192 request = 1;
1193 }
1194 } else {
1195 ff_rtsp_parse_line(s, reply, p, rt, method);
1196 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
1197 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1198 }
1199 line_count++;
1200 }
1201
1202 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0' && !request)
1203 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
1204
1205 content_length = reply->content_length;
1206 if (content_length > 0) {
1207 /* leave some room for a trailing '\0' (useful for simple parsing) */
1208 content = av_malloc(content_length + 1);
1209 if (!content)
1210 return AVERROR(ENOMEM);
1211 ffurl_read_complete(rt->rtsp_hd, content, content_length);
1212 content[content_length] = '\0';
1213 }
1214 if (content_ptr)
1215 *content_ptr = content;
1216 else
1217 av_free(content);
1218
1219 if (request) {
1220 char buf[1024];
1221 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1222 const char* ptr = buf;
1223
1224 if (!strcmp(reply->reason, "OPTIONS")) {
1225 snprintf(buf, sizeof(buf), "RTSP/1.0 200 OK\r\n");
1226 if (reply->seq)
1227 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", reply->seq);
1228 if (reply->session_id[0])
1229 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n",
1230 reply->session_id);
1231 } else {
1232 snprintf(buf, sizeof(buf), "RTSP/1.0 501 Not Implemented\r\n");
1233 }
1234 av_strlcat(buf, "\r\n", sizeof(buf));
1235
1236 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1237 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1238 ptr = base64buf;
1239 }
1240 ffurl_write(rt->rtsp_hd_out, ptr, strlen(ptr));
1241
1242 rt->last_cmd_time = av_gettime_relative();
1243 /* Even if the request from the server had data, it is not the data
1244 * that the caller wants or expects. The memory could also be leaked
1245 * if the actual following reply has content data. */
1246 if (content_ptr)
1247 av_freep(content_ptr);
1248 /* If method is set, this is called from ff_rtsp_send_cmd,
1249 * where a reply to exactly this request is awaited. For
1250 * callers from within packet receiving, we just want to
1251 * return to the caller and go back to receiving packets. */
1252 if (method)
1253 goto start;
1254 return 0;
1255 }
1256
1257 if (rt->seq != reply->seq) {
1258 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
1259 rt->seq, reply->seq);
1260 }
1261
1262 /* EOS */
1263 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
1264 reply->notice == 2104 /* Start-of-Stream Reached */ ||
1265 reply->notice == 2306 /* Continuous Feed Terminated */) {
1266 rt->state = RTSP_STATE_IDLE;
1267 } else if (reply->notice >= 4400 && reply->notice < 5500) {
1268 return AVERROR(EIO); /* data or server error */
1269 } else if (reply->notice == 2401 /* Ticket Expired */ ||
1270 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
1271 return AVERROR(EPERM);
1272
1273 return 0;
1274 }
1275
1276 /**
1277 * Send a command to the RTSP server without waiting for the reply.
1278 *
1279 * @param s RTSP (de)muxer context
1280 * @param method the method for the request
1281 * @param url the target url for the request
1282 * @param headers extra header lines to include in the request
1283 * @param send_content if non-null, the data to send as request body content
1284 * @param send_content_length the length of the send_content data, or 0 if
1285 * send_content is null
1286 *
1287 * @return zero if success, nonzero otherwise
1288 */
1289 static int rtsp_send_cmd_with_content_async(AVFormatContext *s,
1290 const char *method, const char *url,
1291 const char *headers,
1292 const unsigned char *send_content,
1293 int send_content_length)
1294 {
1295 RTSPState *rt = s->priv_data;
1296 char buf[4096], *out_buf;
1297 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1298
1299 /* Add in RTSP headers */
1300 out_buf = buf;
1301 rt->seq++;
1302 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
1303 if (headers)
1304 av_strlcat(buf, headers, sizeof(buf));
1305 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
1306 av_strlcatf(buf, sizeof(buf), "User-Agent: %s\r\n", LIBAVFORMAT_IDENT);
1307 if (rt->session_id[0] != '\0' && (!headers ||
1308 !strstr(headers, "\nIf-Match:"))) {
1309 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
1310 }
1311 if (rt->auth[0]) {
1312 char *str = ff_http_auth_create_response(&rt->auth_state,
1313 rt->auth, url, method);
1314 if (str)
1315 av_strlcat(buf, str, sizeof(buf));
1316 av_free(str);
1317 }
1318 if (send_content_length > 0 && send_content)
1319 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
1320 av_strlcat(buf, "\r\n", sizeof(buf));
1321
1322 /* base64 encode rtsp if tunneling */
1323 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1324 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1325 out_buf = base64buf;
1326 }
1327
1328 av_log(s, AV_LOG_TRACE, "Sending:\n%s--\n", buf);
1329
1330 ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
1331 if (send_content_length > 0 && send_content) {
1332 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1333 avpriv_report_missing_feature(s, "Tunneling of RTSP requests with content data");
1334 return AVERROR_PATCHWELCOME;
1335 }
1336 ffurl_write(rt->rtsp_hd_out, send_content, send_content_length);
1337 }
1338 rt->last_cmd_time = av_gettime_relative();
1339
1340 return 0;
1341 }
1342
1343 int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1344 const char *url, const char *headers)
1345 {
1346 return rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1347 }
1348
1349 int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1350 const char *headers, RTSPMessageHeader *reply,
1351 unsigned char **content_ptr)
1352 {
1353 return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1354 content_ptr, NULL, 0);
1355 }
1356
1357 int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1358 const char *method, const char *url,
1359 const char *header,
1360 RTSPMessageHeader *reply,
1361 unsigned char **content_ptr,
1362 const unsigned char *send_content,
1363 int send_content_length)
1364 {
1365 RTSPState *rt = s->priv_data;
1366 HTTPAuthType cur_auth_type;
1367 int ret, attempts = 0;
1368
1369 retry:
1370 cur_auth_type = rt->auth_state.auth_type;
1371 if ((ret = rtsp_send_cmd_with_content_async(s, method, url, header,
1372 send_content,
1373 send_content_length)))
1374 return ret;
1375
1376 if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1377 return ret;
1378 attempts++;
1379
1380 if (reply->status_code == 401 &&
1381 (cur_auth_type == HTTP_AUTH_NONE || rt->auth_state.stale) &&
1382 rt->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2)
1383 goto retry;
1384
1385 if (reply->status_code > 400){
1386 av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1387 method,
1388 reply->status_code,
1389 reply->reason);
1390 av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1391 }
1392
1393 return 0;
1394 }
1395
1396 int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1397 int lower_transport, const char *real_challenge)
1398 {
1399 RTSPState *rt = s->priv_data;
1400 int rtx = 0, j, i, err, interleave = 0, port_off;
1401 RTSPStream *rtsp_st;
1402 RTSPMessageHeader reply1, *reply = &reply1;
1403 char cmd[2048];
1404 const char *trans_pref;
1405
1406 if (rt->transport == RTSP_TRANSPORT_RDT)
1407 trans_pref = "x-pn-tng";
1408 else if (rt->transport == RTSP_TRANSPORT_RAW)
1409 trans_pref = "RAW/RAW";
1410 else
1411 trans_pref = "RTP/AVP";
1412
1413 /* default timeout: 1 minute */
1414 rt->timeout = 60;
1415
1416 /* for each stream, make the setup request */
1417 /* XXX: we assume the same server is used for the control of each
1418 * RTSP stream */
1419
1420 /* Choose a random starting offset within the first half of the
1421 * port range, to allow for a number of ports to try even if the offset
1422 * happens to be at the end of the random range. */
1423 port_off = av_get_random_seed() % ((rt->rtp_port_max - rt->rtp_port_min)/2);
1424 /* even random offset */
1425 port_off -= port_off & 0x01;
1426
1427 for (j = rt->rtp_port_min + port_off, i = 0; i < rt->nb_rtsp_streams; ++i) {
1428 char transport[2048];
1429
1430 /*
1431 * WMS serves all UDP data over a single connection, the RTX, which
1432 * isn't necessarily the first in the SDP but has to be the first
1433 * to be set up, else the second/third SETUP will fail with a 461.
1434 */
1435 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1436 rt->server_type == RTSP_SERVER_WMS) {
1437 if (i == 0) {
1438 /* rtx first */
1439 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1440 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1441 if (len >= 4 &&
1442 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1443 "/rtx"))
1444 break;
1445 }
1446 if (rtx == rt->nb_rtsp_streams)
1447 return -1; /* no RTX found */
1448 rtsp_st = rt->rtsp_streams[rtx];
1449 } else
1450 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1451 } else
1452 rtsp_st = rt->rtsp_streams[i];
1453
1454 /* RTP/UDP */
1455 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1456 char buf[256];
1457
1458 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1459 port = reply->transports[0].client_port_min;
1460 goto have_port;
1461 }
1462
1463 /* first try in specified port range */
1464 while (j <= rt->rtp_port_max) {
1465 AVDictionary *opts = map_to_opts(rt);
1466
1467 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1468 "?localport=%d", j);
1469 /* we will use two ports per rtp stream (rtp and rtcp) */
1470 j += 2;
1471 err = ffurl_open(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE,
1472 &s->interrupt_callback, &opts, rt->protocols, NULL);
1473
1474 av_dict_free(&opts);
1475
1476 if (!err)
1477 goto rtp_opened;
1478 }
1479
1480 av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1481 err = AVERROR(EIO);
1482 goto fail;
1483
1484 rtp_opened:
1485 port = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1486 have_port:
1487 snprintf(transport, sizeof(transport) - 1,
1488 "%s/UDP;", trans_pref);
1489 if (rt->server_type != RTSP_SERVER_REAL)
1490 av_strlcat(transport, "unicast;", sizeof(transport));
1491 av_strlcatf(transport, sizeof(transport),
1492 "client_port=%d", port);
1493 if (rt->transport == RTSP_TRANSPORT_RTP &&
1494 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1495 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1496 }
1497
1498 /* RTP/TCP */
1499 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1500 /* For WMS streams, the application streams are only used for
1501 * UDP. When trying to set it up for TCP streams, the server
1502 * will return an error. Therefore, we skip those streams. */
1503 if (rt->server_type == RTSP_SERVER_WMS &&
1504 (rtsp_st->stream_index < 0 ||
1505 s->streams[rtsp_st->stream_index]->codecpar->codec_type ==
1506 AVMEDIA_TYPE_DATA))
1507 continue;
1508 snprintf(transport, sizeof(transport) - 1,
1509 "%s/TCP;", trans_pref);
1510 if (rt->transport != RTSP_TRANSPORT_RDT)
1511 av_strlcat(transport, "unicast;", sizeof(transport));
1512 av_strlcatf(transport, sizeof(transport),
1513 "interleaved=%d-%d",
1514 interleave, interleave + 1);
1515 interleave += 2;
1516 }
1517
1518 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1519 snprintf(transport, sizeof(transport) - 1,
1520 "%s/UDP;multicast", trans_pref);
1521 }
1522 if (s->oformat) {
1523 av_strlcat(transport, ";mode=record", sizeof(transport));
1524 } else if (rt->server_type == RTSP_SERVER_REAL ||
1525 rt->server_type == RTSP_SERVER_WMS)
1526 av_strlcat(transport, ";mode=play", sizeof(transport));
1527 snprintf(cmd, sizeof(cmd),
1528 "Transport: %s\r\n",
1529 transport);
1530 if (rt->accept_dynamic_rate)
1531 av_strlcat(cmd, "x-Dynamic-Rate: 0\r\n", sizeof(cmd));
1532 if (CONFIG_RTPDEC && i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1533 char real_res[41], real_csum[9];
1534 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1535 real_challenge);
1536 av_strlcatf(cmd, sizeof(cmd),
1537 "If-Match: %s\r\n"
1538 "RealChallenge2: %s, sd=%s\r\n",
1539 rt->session_id, real_res, real_csum);
1540 }
1541 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1542 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1543 err = 1;
1544 goto fail;
1545 } else if (reply->status_code != RTSP_STATUS_OK ||
1546 reply->nb_transports != 1) {
1547 err = AVERROR_INVALIDDATA;
1548 goto fail;
1549 }
1550
1551 /* XXX: same protocol for all streams is required */
1552 if (i > 0) {
1553 if (reply->transports[0].lower_transport != rt->lower_transport ||
1554 reply->transports[0].transport != rt->transport) {
1555 err = AVERROR_INVALIDDATA;
1556 goto fail;
1557 }
1558 } else {
1559 rt->lower_transport = reply->transports[0].lower_transport;
1560 rt->transport = reply->transports[0].transport;
1561 }
1562
1563 /* Fail if the server responded with another lower transport mode
1564 * than what we requested. */
1565 if (reply->transports[0].lower_transport != lower_transport) {
1566 av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1567 err = AVERROR_INVALIDDATA;
1568 goto fail;
1569 }
1570
1571 switch(reply->transports[0].lower_transport) {
1572 case RTSP_LOWER_TRANSPORT_TCP:
1573 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1574 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1575 break;
1576
1577 case RTSP_LOWER_TRANSPORT_UDP: {
1578 char url[1024], options[30] = "";
1579 const char *peer = host;
1580
1581 if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC)
1582 av_strlcpy(options, "?connect=1", sizeof(options));
1583 /* Use source address if specified */
1584 if (reply->transports[0].source[0])
1585 peer = reply->transports[0].source;
1586 ff_url_join(url, sizeof(url), "rtp", NULL, peer,
1587 reply->transports[0].server_port_min, "%s", options);
1588 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1589 ff_rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1590 err = AVERROR_INVALIDDATA;
1591 goto fail;
1592 }
1593 break;
1594 }
1595 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1596 char url[1024], namebuf[50], optbuf[20] = "";
1597 struct sockaddr_storage addr;
1598 int port, ttl;
1599
1600 if (reply->transports[0].destination.ss_family) {
1601 addr = reply->transports[0].destination;
1602 port = reply->transports[0].port_min;
1603 ttl = reply->transports[0].ttl;
1604 } else {
1605 addr = rtsp_st->sdp_ip;
1606 port = rtsp_st->sdp_port;
1607 ttl = rtsp_st->sdp_ttl;
1608 }
1609 if (ttl > 0)
1610 snprintf(optbuf, sizeof(optbuf), "?ttl=%d", ttl);
1611 getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1612 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1613 ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1614 port, "%s", optbuf);
1615 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
1616 &s->interrupt_callback, NULL, rt->protocols, NULL) < 0) {
1617 err = AVERROR_INVALIDDATA;
1618 goto fail;
1619 }
1620 break;
1621 }
1622 }
1623
1624 if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
1625 goto fail;
1626 }
1627
1628 if (rt->nb_rtsp_streams && reply->timeout > 0)
1629 rt->timeout = reply->timeout;
1630
1631 if (rt->server_type == RTSP_SERVER_REAL)
1632 rt->need_subscription = 1;
1633
1634 return 0;
1635
1636 fail:
1637 ff_rtsp_undo_setup(s, 0);
1638 return err;
1639 }
1640
1641 void ff_rtsp_close_connections(AVFormatContext *s)
1642 {
1643 RTSPState *rt = s->priv_data;
1644 if (rt->rtsp_hd_out != rt->rtsp_hd) ffurl_close(rt->rtsp_hd_out);
1645 ffurl_close(rt->rtsp_hd);
1646 rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1647 }
1648
1649 int ff_rtsp_connect(AVFormatContext *s)
1650 {
1651 RTSPState *rt = s->priv_data;
1652 char proto[128], host[1024], path[1024];
1653 char tcpname[1024], cmd[2048], auth[128];
1654 const char *lower_rtsp_proto = "tcp";
1655 int port, err, tcp_fd;
1656 RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1657 int lower_transport_mask = 0;
1658 int default_port = RTSP_DEFAULT_PORT;
1659 char real_challenge[64] = "";
1660 struct sockaddr_storage peer;
1661 socklen_t peer_len = sizeof(peer);
1662
1663 if (rt->rtp_port_max < rt->rtp_port_min) {
1664 av_log(s, AV_LOG_ERROR, "Invalid UDP port range, max port %d less "
1665 "than min port %d\n", rt->rtp_port_max,
1666 rt->rtp_port_min);
1667 return AVERROR(EINVAL);
1668 }
1669
1670 if (!ff_network_init())
1671 return AVERROR(EIO);
1672
1673 if (!rt->protocols) {
1674 rt->protocols = ffurl_get_protocols(s->protocol_whitelist,
1675 s->protocol_blacklist);
1676 if (!rt->protocols)
1677 return AVERROR(ENOMEM);
1678 }
1679
1680 if (s->max_delay < 0) /* Not set by the caller */
1681 s->max_delay = s->iformat ? DEFAULT_REORDERING_DELAY : 0;
1682
1683 rt->control_transport = RTSP_MODE_PLAIN;
1684 if (rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_HTTP)) {
1685 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1686 rt->control_transport = RTSP_MODE_TUNNEL;
1687 }
1688 /* Only pass through valid flags from here */
1689 rt->lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1690
1691 redirect:
1692 /* extract hostname and port */
1693 av_url_split(proto, sizeof(proto), auth, sizeof(auth),
1694 host, sizeof(host), &port, path, sizeof(path), s->filename);
1695
1696 if (!strcmp(proto, "rtsps")) {
1697 lower_rtsp_proto = "tls";
1698 default_port = RTSPS_DEFAULT_PORT;
1699 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1700 }
1701
1702 if (*auth) {
1703 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1704 }
1705 if (port < 0)
1706 port = default_port;
1707
1708 lower_transport_mask = rt->lower_transport_mask;
1709
1710 if (!lower_transport_mask)
1711 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1712
1713 if (s->oformat) {
1714 /* Only UDP or TCP - UDP multicast isn't supported. */
1715 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1716 (1 << RTSP_LOWER_TRANSPORT_TCP);
1717 if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1718 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1719 "only UDP and TCP are supported for output.\n");
1720 err = AVERROR(EINVAL);
1721 goto fail;
1722 }
1723 }
1724
1725 /* Construct the URI used in request; this is similar to s->filename,
1726 * but with authentication credentials removed and RTSP specific options
1727 * stripped out. */
1728 ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL,
1729 host, port, "%s", path);
1730
1731 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1732 /* set up initial handshake for tunneling */
1733 char httpname[1024];
1734 char sessioncookie[17];
1735 char headers[1024];
1736
1737 ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1738 snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1739 av_get_random_seed(), av_get_random_seed());
1740
1741 /* GET requests */
1742 if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ,
1743 &s->interrupt_callback, rt->protocols) < 0) {
1744 err = AVERROR(EIO);
1745 goto fail;
1746 }
1747
1748 /* generate GET headers */
1749 snprintf(headers, sizeof(headers),
1750 "x-sessioncookie: %s\r\n"
1751 "Accept: application/x-rtsp-tunnelled\r\n"
1752 "Pragma: no-cache\r\n"
1753 "Cache-Control: no-cache\r\n",
1754 sessioncookie);
1755 av_opt_set(rt->rtsp_hd->priv_data, "headers", headers, 0);
1756
1757 /* complete the connection */
1758 if (ffurl_connect(rt->rtsp_hd, NULL)) {
1759 err = AVERROR(EIO);
1760 goto fail;
1761 }
1762
1763 /* POST requests */
1764 if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE,
1765 &s->interrupt_callback, rt->protocols) < 0 ) {
1766 err = AVERROR(EIO);
1767 goto fail;
1768 }
1769
1770 /* generate POST headers */
1771 snprintf(headers, sizeof(headers),
1772 "x-sessioncookie: %s\r\n"
1773 "Content-Type: application/x-rtsp-tunnelled\r\n"
1774 "Pragma: no-cache\r\n"
1775 "Cache-Control: no-cache\r\n"
1776 "Content-Length: 32767\r\n"
1777 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1778 sessioncookie);
1779 av_opt_set(rt->rtsp_hd_out->priv_data, "headers", headers, 0);
1780 av_opt_set(rt->rtsp_hd_out->priv_data, "chunked_post", "0", 0);
1781
1782 /* Initialize the authentication state for the POST session. The HTTP
1783 * protocol implementation doesn't properly handle multi-pass
1784 * authentication for POST requests, since it would require one of
1785 * the following:
1786 * - implementing Expect: 100-continue, which many HTTP servers
1787 * don't support anyway, even less the RTSP servers that do HTTP
1788 * tunneling
1789 * - sending the whole POST data until getting a 401 reply specifying
1790 * what authentication method to use, then resending all that data
1791 * - waiting for potential 401 replies directly after sending the
1792 * POST header (waiting for some unspecified time)
1793 * Therefore, we copy the full auth state, which works for both basic
1794 * and digest. (For digest, we would have to synchronize the nonce
1795 * count variable between the two sessions, if we'd do more requests
1796 * with the original session, though.)
1797 */
1798 ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1799
1800 /* complete the connection */
1801 if (ffurl_connect(rt->rtsp_hd_out, NULL)) {
1802 err = AVERROR(EIO);
1803 goto fail;
1804 }
1805 } else {
1806 /* open the tcp connection */
1807 ff_url_join(tcpname, sizeof(tcpname), lower_rtsp_proto, NULL,
1808 host, port, NULL);
1809 if (ffurl_open(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
1810 &s->interrupt_callback, NULL, rt->protocols, NULL) < 0) {
1811 err = AVERROR(EIO);
1812 goto fail;
1813 }
1814 rt->rtsp_hd_out = rt->rtsp_hd;
1815 }
1816 rt->seq = 0;
1817
1818 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1819 if (tcp_fd < 0) {
1820 err = tcp_fd;
1821 goto fail;
1822 }
1823 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1824 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1825 NULL, 0, NI_NUMERICHOST);
1826 }
1827
1828 /* request options supported by the server; this also detects server
1829 * type */
1830 for (rt->server_type = RTSP_SERVER_RTP;;) {
1831 cmd[0] = 0;
1832 if (rt->server_type == RTSP_SERVER_REAL)
1833 av_strlcat(cmd,
1834 /*
1835 * The following entries are required for proper
1836 * streaming from a Realmedia server. They are
1837 * interdependent in some way although we currently
1838 * don't quite understand how. Values were copied
1839 * from mplayer SVN r23589.
1840 * ClientChallenge is a 16-byte ID in hex
1841 * CompanyID is a 16-byte ID in base64
1842 */
1843 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1844 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1845 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1846 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1847 sizeof(cmd));
1848 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1849 if (reply->status_code != RTSP_STATUS_OK) {
1850 err = AVERROR_INVALIDDATA;
1851 goto fail;
1852 }
1853
1854 /* detect server type if not standard-compliant RTP */
1855 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1856 rt->server_type = RTSP_SERVER_REAL;
1857 continue;
1858 } else if (!av_strncasecmp(reply->server, "WMServer/", 9)) {
1859 rt->server_type = RTSP_SERVER_WMS;
1860 } else if (rt->server_type == RTSP_SERVER_REAL)
1861 strcpy(real_challenge, reply->real_challenge);
1862 break;
1863 }
1864
1865 if (CONFIG_RTSP_DEMUXER && s->iformat)
1866 err = ff_rtsp_setup_input_streams(s, reply);
1867 else if (CONFIG_RTSP_MUXER)
1868 err = ff_rtsp_setup_output_streams(s, host);
1869 if (err)
1870 goto fail;
1871
1872 do {
1873 int lower_transport = ff_log2_tab[lower_transport_mask &
1874 ~(lower_transport_mask - 1)];
1875
1876 err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1877 rt->server_type == RTSP_SERVER_REAL ?
1878 real_challenge : NULL);
1879 if (err < 0)
1880 goto fail;
1881 lower_transport_mask &= ~(1 << lower_transport);
1882 if (lower_transport_mask == 0 && err == 1) {
1883 err = AVERROR(EPROTONOSUPPORT);
1884 goto fail;
1885 }
1886 } while (err);
1887
1888 rt->lower_transport_mask = lower_transport_mask;
1889 av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1890 rt->state = RTSP_STATE_IDLE;
1891 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1892 return 0;
1893 fail:
1894 ff_rtsp_close_streams(s);
1895 ff_rtsp_close_connections(s);
1896 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1897 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1898 rt->session_id[0] = '\0';
1899 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1900 reply->status_code,
1901 s->filename);
1902 goto redirect;
1903 }
1904 ff_network_close();
1905 return err;
1906 }
1907 #endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1908
1909 #if CONFIG_RTPDEC
1910 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1911 uint8_t *buf, int buf_size, int64_t wait_end)
1912 {
1913 RTSPState *rt = s->priv_data;
1914 RTSPStream *rtsp_st;
1915 int n, i, ret, tcp_fd, timeout_cnt = 0;
1916 struct pollfd *p = rt->p;
1917 int *fds = NULL, fdsnum, fdsidx;
1918
1919 if (!p) {
1920 p = rt->p = av_malloc_array(2 * (rt->nb_rtsp_streams + 1), sizeof(struct pollfd));
1921 if (!p)
1922 return AVERROR(ENOMEM);
1923
1924 if (rt->rtsp_hd) {
1925 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1926 p[rt->max_p].fd = tcp_fd;
1927 p[rt->max_p++].events = POLLIN;
1928 } else {
1929 tcp_fd = -1;
1930 }
1931 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1932 rtsp_st = rt->rtsp_streams[i];
1933 if (rtsp_st->rtp_handle) {
1934 if (ret = ffurl_get_multi_file_handle(rtsp_st->rtp_handle,
1935 &fds, &fdsnum)) {
1936 av_log(s, AV_LOG_ERROR, "Unable to recover rtp ports\n");
1937 return ret;
1938 }
1939 if (fdsnum != 2) {
1940 av_log(s, AV_LOG_ERROR,
1941 "Number of fds %d not supported\n", fdsnum);
1942 return AVERROR_INVALIDDATA;
1943 }
1944 for (fdsidx = 0; fdsidx < fdsnum; fdsidx++) {
1945 p[rt->max_p].fd = fds[fdsidx];
1946 p[rt->max_p++].events = POLLIN;
1947 }
1948 av_free(fds);
1949 }
1950 }
1951 }
1952
1953 for (;;) {
1954 if (ff_check_interrupt(&s->interrupt_callback))
1955 return AVERROR_EXIT;
1956 if (wait_end && wait_end - av_gettime_relative() < 0)
1957 return AVERROR(EAGAIN);
1958 n = poll(p, rt->max_p, POLL_TIMEOUT_MS);
1959 if (n > 0) {
1960 int j = 1 - (tcp_fd == -1);
1961 timeout_cnt = 0;
1962 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1963 rtsp_st = rt->rtsp_streams[i];
1964 if (rtsp_st->rtp_handle) {
1965 if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
1966 ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size);
1967 if (ret > 0) {
1968 *prtsp_st = rtsp_st;
1969 return ret;
1970 }
1971 }
1972 j+=2;
1973 }
1974 }
1975 #if CONFIG_RTSP_DEMUXER
1976 if (tcp_fd != -1 && p[0].revents & POLLIN) {
1977 if (rt->rtsp_flags & RTSP_FLAG_LISTEN) {
1978 if (rt->state == RTSP_STATE_STREAMING) {
1979 if (!ff_rtsp_parse_streaming_commands(s))
1980 return AVERROR_EOF;
1981 else
1982 av_log(s, AV_LOG_WARNING,
1983 "Unable to answer to TEARDOWN\n");
1984 } else
1985 return 0;
1986 } else {
1987 RTSPMessageHeader reply;
1988 ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1989 if (ret < 0)
1990 return ret;
1991 /* XXX: parse message */
1992 if (rt->state != RTSP_STATE_STREAMING)
1993 return 0;
1994 }
1995 }
1996 #endif
1997 } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1998 return AVERROR(ETIMEDOUT);
1999 } else if (n < 0 && errno != EINTR)
2000 return AVERROR(errno);
2001 }
2002 }
2003
2004 static int pick_stream(AVFormatContext *s, RTSPStream **rtsp_st,
2005 const uint8_t *buf, int len)
2006 {
2007 RTSPState *rt = s->priv_data;
2008 int i;
2009 if (len < 0)
2010 return len;
2011 if (rt->nb_rtsp_streams == 1) {
2012 *rtsp_st = rt->rtsp_streams[0];
2013 return len;
2014 }
2015 if (len >= 8 && rt->transport == RTSP_TRANSPORT_RTP) {
2016 if (RTP_PT_IS_RTCP(rt->recvbuf[1])) {
2017 int no_ssrc = 0;
2018 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2019 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
2020 if (!rtpctx)
2021 continue;
2022 if (rtpctx->ssrc == AV_RB32(&buf[4])) {
2023 *rtsp_st = rt->rtsp_streams[i];
2024 return len;
2025 }
2026 if (!rtpctx->ssrc)
2027 no_ssrc = 1;
2028 }
2029 if (no_ssrc) {
2030 av_log(s, AV_LOG_WARNING,
2031 "Unable to pick stream for packet - SSRC not known for "
2032 "all streams\n");
2033 return AVERROR(EAGAIN);
2034 }
2035 } else {
2036 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2037 if ((buf[1] & 0x7f) == rt->rtsp_streams[i]->sdp_payload_type) {
2038 *rtsp_st = rt->rtsp_streams[i];
2039 return len;
2040 }
2041 }
2042 }
2043 }
2044 av_log(s, AV_LOG_WARNING, "Unable to pick stream for packet\n");
2045 return AVERROR(EAGAIN);
2046 }
2047
2048 static int read_packet(AVFormatContext *s,
2049 RTSPStream **rtsp_st, RTSPStream *first_queue_st,
2050 int64_t wait_end)
2051 {
2052 RTSPState *rt = s->priv_data;
2053 int len;
2054
2055 switch(rt->lower_transport) {
2056 default:
2057 #if CONFIG_RTSP_DEMUXER
2058 case RTSP_LOWER_TRANSPORT_TCP:
2059 len = ff_rtsp_tcp_read_packet(s, rtsp_st, rt->recvbuf, RECVBUF_SIZE);
2060 break;
2061 #endif
2062 case RTSP_LOWER_TRANSPORT_UDP:
2063 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
2064 len = udp_read_packet(s, rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
2065 if (len > 0 && (*rtsp_st)->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
2066 ff_rtp_check_and_send_back_rr((*rtsp_st)->transport_priv, (*rtsp_st)->rtp_handle, NULL, len);
2067 break;
2068 case RTSP_LOWER_TRANSPORT_CUSTOM:
2069 if (first_queue_st && rt->transport == RTSP_TRANSPORT_RTP &&
2070 wait_end && wait_end < av_gettime_relative())
2071 len = AVERROR(EAGAIN);
2072 else
2073 len = ffio_read_partial(s->pb, rt->recvbuf, RECVBUF_SIZE);
2074 len = pick_stream(s, rtsp_st, rt->recvbuf, len);
2075 if (len > 0 && (*rtsp_st)->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
2076 ff_rtp_check_and_send_back_rr((*rtsp_st)->transport_priv, NULL, s->pb, len);
2077 break;
2078 }
2079
2080 if (len == 0)
2081 return AVERROR_EOF;
2082
2083 return len;
2084 }
2085
2086 int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
2087 {
2088 RTSPState *rt = s->priv_data;
2089 int ret, len;
2090 RTSPStream *rtsp_st, *first_queue_st = NULL;
2091 int64_t wait_end = 0;
2092
2093 if (rt->nb_byes == rt->nb_rtsp_streams)
2094 return AVERROR_EOF;
2095
2096 /* get next frames from the same RTP packet */
2097 if (rt->cur_transport_priv) {
2098 if (rt->transport == RTSP_TRANSPORT_RDT) {
2099 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
2100 } else if (rt->transport == RTSP_TRANSPORT_RTP) {
2101 ret = ff_rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
2102 } else if (CONFIG_RTPDEC && rt->ts) {
2103 ret = ff_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf + rt->recvbuf_pos, rt->recvbuf_len - rt->recvbuf_pos);
2104 if (ret >= 0) {
2105 rt->recvbuf_pos += ret;
2106 ret = rt->recvbuf_pos < rt->recvbuf_len;
2107 }
2108 } else
2109 ret = -1;
2110 if (ret == 0) {
2111 rt->cur_transport_priv = NULL;
2112 return 0;
2113 } else if (ret == 1) {
2114 return 0;
2115 } else
2116 rt->cur_transport_priv = NULL;
2117 }
2118
2119 redo:
2120 if (rt->transport == RTSP_TRANSPORT_RTP) {
2121 int i;
2122 int64_t first_queue_time = 0;
2123 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2124 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
2125 int64_t queue_time;
2126 if (!rtpctx)
2127 continue;
2128 queue_time = ff_rtp_queued_packet_time(rtpctx);
2129 if (queue_time && (queue_time - first_queue_time < 0 ||
2130 !first_queue_time)) {
2131 first_queue_time = queue_time;
2132 first_queue_st = rt->rtsp_streams[i];
2133 }
2134 }
2135 if (first_queue_time) {
2136 wait_end = first_queue_time + s->max_delay;
2137 } else {
2138 wait_end = 0;
2139 first_queue_st = NULL;
2140 }
2141 }
2142
2143 /* read next RTP packet */
2144 if (!rt->recvbuf) {
2145 rt->recvbuf = av_malloc(RECVBUF_SIZE);
2146 if (!rt->recvbuf)
2147 return AVERROR(ENOMEM);
2148 }
2149
2150 len = read_packet(s, &rtsp_st, first_queue_st, wait_end);
2151 if (len == AVERROR(EAGAIN) && first_queue_st &&
2152 rt->transport == RTSP_TRANSPORT_RTP) {
2153 av_log(s, AV_LOG_WARNING,
2154 "max delay reached. need to consume packet\n");
2155 rtsp_st = first_queue_st;
2156 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
2157 goto end;
2158 }
2159 if (len < 0)
2160 return len;
2161
2162 if (rt->transport == RTSP_TRANSPORT_RDT) {
2163 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2164 } else if (rt->transport == RTSP_TRANSPORT_RTP) {
2165 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2166 if (rtsp_st->feedback) {
2167 AVIOContext *pb = NULL;
2168 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_CUSTOM)
2169 pb = s->pb;
2170 ff_rtp_send_rtcp_feedback(rtsp_st->transport_priv, rtsp_st->rtp_handle, pb);
2171 }
2172 if (ret < 0) {
2173 /* Either bad packet, or a RTCP packet. Check if the
2174 * first_rtcp_ntp_time field was initialized. */
2175 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
2176 if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
2177 /* first_rtcp_ntp_time has been initialized for this stream,
2178 * copy the same value to all other uninitialized streams,
2179 * in order to map their timestamp origin to the same ntp time
2180 * as this one. */
2181 int i;
2182 AVStream *st = NULL;
2183 if (rtsp_st->stream_index >= 0)
2184 st = s->streams[rtsp_st->stream_index];
2185 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2186 RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
2187 AVStream *st2 = NULL;
2188 if (rt->rtsp_streams[i]->stream_index >= 0)
2189 st2 = s->streams[rt->rtsp_streams[i]->stream_index];
2190 if (rtpctx2 && st && st2 &&
2191 rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
2192 rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
2193 rtpctx2->rtcp_ts_offset = av_rescale_q(
2194 rtpctx->rtcp_ts_offset, st->time_base,
2195 st2->time_base);
2196 }
2197 }
2198 }
2199 if (ret == -RTCP_BYE) {
2200 rt->nb_byes++;
2201
2202 av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
2203 rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
2204
2205 if (rt->nb_byes == rt->nb_rtsp_streams)
2206 return AVERROR_EOF;
2207 }
2208 }
2209 } else if (CONFIG_RTPDEC && rt->ts) {
2210 ret = ff_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf, len);
2211 if (ret >= 0) {
2212 if (ret < len) {
2213 rt->recvbuf_len = len;
2214 rt->recvbuf_pos = ret;
2215 rt->cur_transport_priv = rt->ts;
2216 return 1;
2217 } else {
2218 ret = 0;
2219 }
2220 }
2221 } else {
2222 return AVERROR_INVALIDDATA;
2223 }
2224 end:
2225 if (ret < 0)
2226 goto redo;
2227 if (ret == 1)
2228 /* more packets may follow, so we save the RTP context */
2229 rt->cur_transport_priv = rtsp_st->transport_priv;
2230
2231 return ret;
2232 }
2233 #endif /* CONFIG_RTPDEC */
2234
2235 #if CONFIG_SDP_DEMUXER
2236 static int sdp_probe(AVProbeData *p1)
2237 {
2238 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
2239
2240 /* we look for a line beginning "c=IN IP" */
2241 while (p < p_end && *p != '\0') {
2242 if (p + sizeof("c=IN IP") - 1 < p_end &&
2243 av_strstart(p, "c=IN IP", NULL))
2244 return AVPROBE_SCORE_EXTENSION;
2245
2246 while (p < p_end - 1 && *p != '\n') p++;
2247 if (++p >= p_end)
2248 break;
2249 if (*p == '\r')
2250 p++;
2251 }
2252 return 0;
2253 }
2254
2255 static void append_source_addrs(char *buf, int size, const char *name,
2256 int count, struct RTSPSource **addrs)
2257 {
2258 int i;
2259 if (!count)
2260 return;
2261 av_strlcatf(buf, size, "&%s=%s", name, addrs[0]->addr);
2262 for (i = 1; i < count; i++)
2263 av_strlcatf(buf, size, ",%s", addrs[i]->addr);
2264 }
2265
2266 static int sdp_read_header(AVFormatContext *s)
2267 {
2268 RTSPState *rt = s->priv_data;
2269 RTSPStream *rtsp_st;
2270 int size, i, err;
2271 char *content;
2272 char url[1024];
2273
2274 if (!ff_network_init())
2275 return AVERROR(EIO);
2276
2277 if (!rt->protocols) {
2278 rt->protocols = ffurl_get_protocols(s->protocol_whitelist,
2279 s->protocol_blacklist);
2280 if (!rt->protocols)
2281 return AVERROR(ENOMEM);
2282 }
2283
2284 if (s->max_delay < 0) /* Not set by the caller */
2285 s->max_delay = DEFAULT_REORDERING_DELAY;
2286 if (rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)
2287 rt->lower_transport = RTSP_LOWER_TRANSPORT_CUSTOM;
2288
2289 /* read the whole sdp file */
2290 /* XXX: better loading */
2291 content = av_malloc(SDP_MAX_SIZE);
2292 if (!content)
2293 return AVERROR(ENOMEM);
2294 size = avio_read(s->pb, content, SDP_MAX_SIZE - 1);
2295 if (size <= 0) {
2296 av_free(content);
2297 return AVERROR_INVALIDDATA;
2298 }
2299 content[size] ='\0';
2300
2301 err = ff_sdp_parse(s, content);
2302 av_free(content);
2303 if (err) goto fail;
2304
2305 /* open each RTP stream */
2306 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2307 char namebuf[50];
2308 rtsp_st = rt->rtsp_streams[i];
2309
2310 if (!(rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)) {
2311 AVDictionary *opts = map_to_opts(rt);
2312
2313 err = getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip,
2314 sizeof(rtsp_st->sdp_ip),
2315 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
2316 if (err) {
2317 av_log(s, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(err));
2318 err = AVERROR(EIO);
2319 av_dict_free(&opts);
2320 goto fail;
2321 }
2322 ff_url_join(url, sizeof(url), "rtp", NULL,
2323 namebuf, rtsp_st->sdp_port,
2324 "?localport=%d&ttl=%d&connect=%d&write_to_source=%d",
2325 rtsp_st->sdp_port, rtsp_st->sdp_ttl,
2326 rt->rtsp_flags & RTSP_FLAG_FILTER_SRC ? 1 : 0,
2327 rt->rtsp_flags & RTSP_FLAG_RTCP_TO_SOURCE ? 1 : 0);
2328
2329 append_source_addrs(url, sizeof(url), "sources",
2330 rtsp_st->nb_include_source_addrs,
2331 rtsp_st->include_source_addrs);
2332 append_source_addrs(url, sizeof(url), "block",
2333 rtsp_st->nb_exclude_source_addrs,
2334 rtsp_st->exclude_source_addrs);
2335 err = ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
2336 &s->interrupt_callback, &opts, rt->protocols, NULL);
2337
2338 av_dict_free(&opts);
2339
2340 if (err < 0) {
2341 err = AVERROR_INVALIDDATA;
2342 goto fail;
2343 }
2344 }
2345 if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
2346 goto fail;
2347 }
2348 return 0;
2349 fail:
2350 ff_rtsp_close_streams(s);
2351 ff_network_close();
2352 return err;
2353 }
2354
2355 static int sdp_read_close(AVFormatContext *s)
2356 {
2357 ff_rtsp_close_streams(s);
2358 ff_network_close();
2359 return 0;
2360 }
2361
2362 static const AVClass sdp_demuxer_class = {
2363 .class_name = "SDP demuxer",
2364 .item_name = av_default_item_name,
2365 .option = sdp_options,
2366 .version = LIBAVUTIL_VERSION_INT,
2367 };
2368
2369 AVInputFormat ff_sdp_demuxer = {
2370 .name = "sdp",
2371 .long_name = NULL_IF_CONFIG_SMALL("SDP"),
2372 .priv_data_size = sizeof(RTSPState),
2373 .read_probe = sdp_probe,
2374 .read_header = sdp_read_header,
2375 .read_packet = ff_rtsp_fetch_packet,
2376 .read_close = sdp_read_close,
2377 .priv_class = &sdp_demuxer_class,
2378 };
2379 #endif /* CONFIG_SDP_DEMUXER */
2380
2381 #if CONFIG_RTP_DEMUXER
2382 static int rtp_probe(AVProbeData *p)
2383 {
2384 if (av_strstart(p->filename, "rtp:", NULL))
2385 return AVPROBE_SCORE_MAX;
2386 return 0;
2387 }
2388
2389 static int rtp_read_header(AVFormatContext *s)
2390 {
2391 uint8_t recvbuf[RTP_MAX_PACKET_LENGTH];
2392 char host[500], sdp[500];
2393 int ret, port;
2394 URLContext* in = NULL;
2395 int payload_type;
2396 AVCodecParameters *par = NULL;
2397 struct sockaddr_storage addr;
2398 AVIOContext pb;
2399 socklen_t addrlen = sizeof(addr);
2400 RTSPState *rt = s->priv_data;
2401
2402 if (!ff_network_init())
2403 return AVERROR(EIO);
2404
2405 if (!rt->protocols) {
2406 rt->protocols = ffurl_get_protocols(s->protocol_whitelist,
2407 s->protocol_blacklist);
2408 if (!rt->protocols)
2409 return AVERROR(ENOMEM);
2410 }
2411
2412 ret = ffurl_open(&in, s->filename, AVIO_FLAG_READ,
2413 &s->interrupt_callback, NULL, rt->protocols, NULL);
2414 if (ret)
2415 goto fail;
2416
2417 while (1) {
2418 ret = ffurl_read(in, recvbuf, sizeof(recvbuf));
2419 if (ret == AVERROR(EAGAIN))
2420 continue;
2421 if (ret < 0)
2422 goto fail;
2423 if (ret < 12) {
2424 av_log(s, AV_LOG_WARNING, "Received too short packet\n");
2425 continue;
2426 }
2427
2428 if ((recvbuf[0] & 0xc0) != 0x80) {
2429 av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
2430 "received\n");
2431 continue;
2432 }
2433
2434 if (RTP_PT_IS_RTCP(recvbuf[1]))
2435 continue;
2436
2437 payload_type = recvbuf[1] & 0x7f;
2438 break;
2439 }
2440 getsockname(ffurl_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
2441 ffurl_close(in);
2442 in = NULL;
2443
2444 par = avcodec_parameters_alloc();
2445 if (!par) {
2446 ret = AVERROR(ENOMEM);
2447 goto fail;
2448 }
2449
2450 if (ff_rtp_get_codec_info(par, payload_type)) {
2451 av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
2452 "without an SDP file describing it\n",
2453 payload_type);
2454 goto fail;
2455 }
2456 if (par->codec_type != AVMEDIA_TYPE_DATA) {
2457 av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
2458 "properly you need an SDP file "
2459 "describing it\n");
2460 }
2461
2462 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
2463 NULL, 0, s->filename);
2464
2465 snprintf(sdp, sizeof(sdp),
2466 "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
2467 addr.ss_family == AF_INET ? 4 : 6, host,
2468 par->codec_type == AVMEDIA_TYPE_DATA ? "application" :
2469 par->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
2470 port, payload_type);
2471 av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
2472 avcodec_parameters_free(&par);
2473
2474 ffio_init_context(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
2475 s->pb = &pb;
2476
2477 /* sdp_read_header initializes this again */
2478 ff_network_close();
2479
2480 rt->media_type_mask = (1 << (AVMEDIA_TYPE_DATA+1)) - 1;
2481
2482 ret = sdp_read_header(s);
2483 s->pb = NULL;
2484 return ret;
2485
2486 fail:
2487 avcodec_parameters_free(&par);
2488 if (in)
2489 ffurl_close(in);
2490 ff_network_close();
2491 return ret;
2492 }
2493
2494 static const AVClass rtp_demuxer_class = {
2495 .class_name = "RTP demuxer",
2496 .item_name = av_default_item_name,
2497 .option = rtp_options,
2498 .version = LIBAVUTIL_VERSION_INT,
2499 };
2500
2501 AVInputFormat ff_rtp_demuxer = {
2502 .name = "rtp",
2503 .long_name = NULL_IF_CONFIG_SMALL("RTP input"),
2504 .priv_data_size = sizeof(RTSPState),
2505 .read_probe = rtp_probe,
2506 .read_header = rtp_read_header,
2507 .read_packet = ff_rtsp_fetch_packet,
2508 .read_close = sdp_read_close,
2509 .flags = AVFMT_NOFILE,
2510 .priv_class = &rtp_demuxer_class,
2511 };
2512 #endif /* CONFIG_RTP_DEMUXER */