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tools/sofa2wavs: fix build on Windows
[ffmpeg.git] / libavformat / rtsp.c
1 /*
2 * RTSP/SDP client
3 * Copyright (c) 2002 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "config_components.h"
23
24 #include "libavutil/avassert.h"
25 #include "libavutil/base64.h"
26 #include "libavutil/bprint.h"
27 #include "libavutil/avstring.h"
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/mathematics.h"
30 #include "libavutil/mem.h"
31 #include "libavutil/parseutils.h"
32 #include "libavutil/random_seed.h"
33 #include "libavutil/dict.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/time.h"
36 #include "libavcodec/codec_desc.h"
37 #include "avformat.h"
38 #include "avio_internal.h"
39 #include "demux.h"
40
41 #if HAVE_POLL_H
42 #include <poll.h>
43 #endif
44 #include "internal.h"
45 #include "network.h"
46 #include "os_support.h"
47 #include "http.h"
48 #include "rtsp.h"
49
50 #include "rtpdec.h"
51 #include "rtpproto.h"
52 #include "rdt.h"
53 #include "rtpdec_formats.h"
54 #include "rtpenc_chain.h"
55 #include "url.h"
56 #include "tls.h"
57 #include "rtpenc.h"
58 #include "mpegts.h"
59 #include "version.h"
60
61 /* Default timeout values for read packet in seconds */
62 #define READ_PACKET_TIMEOUT_S 10
63 #define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
64 #define DEFAULT_REORDERING_DELAY 100000
65
66 #define OFFSET(x) offsetof(RTSPState, x)
67 #define DEC AV_OPT_FLAG_DECODING_PARAM
68 #define ENC AV_OPT_FLAG_ENCODING_PARAM
69
70 #define RTSP_FLAG_OPTS(name, longname) \
71 { name, longname, OFFSET(rtsp_flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC, .unit = "rtsp_flags" }, \
72 { "filter_src", "only receive packets from the negotiated peer IP", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_FILTER_SRC}, 0, 0, DEC, .unit = "rtsp_flags" }
73
74 #define RTSP_MEDIATYPE_OPTS(name, longname) \
75 { name, longname, OFFSET(media_type_mask), AV_OPT_TYPE_FLAGS, { .i64 = (1 << (AVMEDIA_TYPE_SUBTITLE+1)) - 1 }, INT_MIN, INT_MAX, DEC, .unit = "allowed_media_types" }, \
76 { "video", "Video", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_VIDEO}, 0, 0, DEC, .unit = "allowed_media_types" }, \
77 { "audio", "Audio", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_AUDIO}, 0, 0, DEC, .unit = "allowed_media_types" }, \
78 { "data", "Data", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_DATA}, 0, 0, DEC, .unit = "allowed_media_types" }, \
79 { "subtitle", "Subtitle", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_SUBTITLE}, 0, 0, DEC, .unit = "allowed_media_types" }
80
81 #define COMMON_OPTS() \
82 { "reorder_queue_size", "set number of packets to buffer for handling of reordered packets", OFFSET(reordering_queue_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, DEC }, \
83 { "buffer_size", "Underlying protocol send/receive buffer size", OFFSET(buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, DEC|ENC }, \
84 { "pkt_size", "Underlying protocol send packet size", OFFSET(pkt_size), AV_OPT_TYPE_INT, { .i64 = 1472 }, -1, INT_MAX, ENC } \
85
86
87 const AVOption ff_rtsp_options[] = {
88 { "initial_pause", "do not start playing the stream immediately", OFFSET(initial_pause), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DEC },
89 FF_RTP_FLAG_OPTS(RTSPState, rtp_muxer_flags),
90 { "rtsp_transport", "set RTSP transport protocols", OFFSET(lower_transport_mask), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC|ENC, .unit = "rtsp_transport" }, \
91 { "udp", "UDP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP}, 0, 0, DEC|ENC, .unit = "rtsp_transport" }, \
92 { "tcp", "TCP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_TCP}, 0, 0, DEC|ENC, .unit = "rtsp_transport" }, \
93 { "udp_multicast", "UDP multicast", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP_MULTICAST}, 0, 0, DEC, .unit = "rtsp_transport" },
94 { "http", "HTTP tunneling", 0, AV_OPT_TYPE_CONST, {.i64 = (1 << RTSP_LOWER_TRANSPORT_HTTP)}, 0, 0, DEC, .unit = "rtsp_transport" },
95 { "https", "HTTPS tunneling", 0, AV_OPT_TYPE_CONST, {.i64 = (1 << RTSP_LOWER_TRANSPORT_HTTPS )}, 0, 0, DEC, .unit = "rtsp_transport" },
96 RTSP_FLAG_OPTS("rtsp_flags", "set RTSP flags"),
97 { "listen", "wait for incoming connections", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_LISTEN}, 0, 0, DEC, .unit = "rtsp_flags" },
98 { "prefer_tcp", "try RTP via TCP first, if available", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_PREFER_TCP}, 0, 0, DEC|ENC, .unit = "rtsp_flags" },
99 { "satip_raw", "export raw MPEG-TS stream instead of demuxing", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_SATIP_RAW}, 0, 0, DEC, .unit = "rtsp_flags" },
100 RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"),
101 { "min_port", "set minimum local UDP port", OFFSET(rtp_port_min), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MIN}, 0, 65535, DEC|ENC },
102 { "max_port", "set maximum local UDP port", OFFSET(rtp_port_max), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MAX}, 0, 65535, DEC|ENC },
103 { "listen_timeout", "set maximum timeout (in seconds) to wait for incoming connections (-1 is infinite, imply flag listen)", OFFSET(initial_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, DEC },
104 { "timeout", "set timeout (in microseconds) of socket I/O operations", OFFSET(stimeout), AV_OPT_TYPE_INT64, {.i64 = 0}, INT_MIN, INT64_MAX, DEC },
105 COMMON_OPTS(),
106 { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = LIBAVFORMAT_IDENT}, 0, 0, DEC },
107
108 // TLS options
109 FF_TLS_CLIENT_OPTIONS(RTSPState, tls_opts),
110 { NULL },
111 };
112
113 static const AVOption sdp_options[] = {
114 RTSP_FLAG_OPTS("sdp_flags", "SDP flags"),
115 { "custom_io", "use custom I/O", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_CUSTOM_IO}, 0, 0, DEC, .unit = "rtsp_flags" },
116 { "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, .unit = "rtsp_flags" },
117 { "listen_timeout", "set maximum timeout (in seconds) to wait for incoming connections", OFFSET(stimeout), AV_OPT_TYPE_DURATION, {.i64 = READ_PACKET_TIMEOUT_S*1000000}, INT_MIN, INT64_MAX, DEC },
118 { "localaddr", "local address", OFFSET(localaddr),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, \
119 RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"),
120 COMMON_OPTS(),
121 { NULL },
122 };
123
124 static const AVOption rtp_options[] = {
125 RTSP_FLAG_OPTS("rtp_flags", "set RTP flags"),
126 { "listen_timeout", "set maximum timeout (in seconds) to wait for incoming connections", OFFSET(stimeout), AV_OPT_TYPE_DURATION, {.i64 = READ_PACKET_TIMEOUT_S*1000000}, INT_MIN, INT64_MAX, DEC },
127 { "localaddr", "local address", OFFSET(localaddr),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, \
128 RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"),
129 COMMON_OPTS(),
130 { NULL },
131 };
132
133
134 static AVDictionary *map_to_opts(RTSPState *rt)
135 {
136 AVDictionary *opts = NULL;
137
138 av_dict_set_int(&opts, "buffer_size", rt->buffer_size, 0);
139 av_dict_set_int(&opts, "pkt_size", rt->pkt_size, 0);
140 if (rt->localaddr && rt->localaddr[0])
141 av_dict_set(&opts, "localaddr", rt->localaddr, 0);
142
143 return opts;
144 }
145
146 #define ERR_RET(c) \
147 do { \
148 int ret = c; \
149 if (ret < 0) \
150 return ret; \
151 } while (0)
152
153 /**
154 * Add the TLS options of the given RTSPState to the dict
155 */
156 static int copy_tls_opts_dict(RTSPState *rt, AVDictionary **dict)
157 {
158 ERR_RET(av_dict_set_int(dict, "tls_verify", rt->tls_opts.verify, 0));
159 ERR_RET(av_dict_set(dict, "ca_file", rt->tls_opts.ca_file, 0));
160 ERR_RET(av_dict_set(dict, "cert_file", rt->tls_opts.cert_file, 0));
161 ERR_RET(av_dict_set(dict, "key_file", rt->tls_opts.key_file, 0));
162 ERR_RET(av_dict_set(dict, "verifyhost", rt->tls_opts.host, 0));
163
164 return 0;
165 }
166
167 #undef ERR_RET
168
169 static void get_word_until_chars(char *buf, int buf_size,
170 const char *sep, const char **pp)
171 {
172 const char *p;
173 char *q;
174
175 p = *pp;
176 p += strspn(p, SPACE_CHARS);
177 q = buf;
178 while (!strchr(sep, *p) && *p != '\0') {
179 if ((q - buf) < buf_size - 1)
180 *q++ = *p;
181 p++;
182 }
183 if (buf_size > 0)
184 *q = '\0';
185 *pp = p;
186 }
187
188 static void get_word_sep(char *buf, int buf_size, const char *sep,
189 const char **pp)
190 {
191 if (**pp == '/') (*pp)++;
192 get_word_until_chars(buf, buf_size, sep, pp);
193 }
194
195 static void get_word(char *buf, int buf_size, const char **pp)
196 {
197 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
198 }
199
200 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
201 * and end time.
202 * Used for seeking in the rtp stream.
203 */
204 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
205 {
206 char buf[256];
207
208 p += strspn(p, SPACE_CHARS);
209 if (!av_stristart(p, "npt=", &p))
210 return;
211
212 *start = AV_NOPTS_VALUE;
213 *end = AV_NOPTS_VALUE;
214
215 get_word_sep(buf, sizeof(buf), "-", &p);
216 if (av_parse_time(start, buf, 1) < 0)
217 return;
218 if (*p == '-') {
219 p++;
220 get_word_sep(buf, sizeof(buf), "-", &p);
221 if (av_parse_time(end, buf, 1) < 0)
222 av_log(NULL, AV_LOG_DEBUG, "Failed to parse interval end specification '%s'\n", buf);
223 }
224 }
225
226 static int get_sockaddr(AVFormatContext *s,
227 const char *buf, struct sockaddr_storage *sock)
228 {
229 struct addrinfo hints = { 0 }, *ai = NULL;
230 int ret;
231
232 hints.ai_flags = AI_NUMERICHOST;
233 if ((ret = getaddrinfo(buf, NULL, &hints, &ai))) {
234 av_log(s, AV_LOG_ERROR, "getaddrinfo(%s): %s\n",
235 buf,
236 gai_strerror(ret));
237 return -1;
238 }
239 memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
240 freeaddrinfo(ai);
241 return 0;
242 }
243
244 #if CONFIG_RTPDEC
245 static void init_rtp_handler(const RTPDynamicProtocolHandler *handler,
246 RTSPStream *rtsp_st, AVStream *st)
247 {
248 AVCodecParameters *par = st ? st->codecpar : NULL;
249 if (!handler)
250 return;
251 if (par)
252 par->codec_id = handler->codec_id;
253 rtsp_st->dynamic_handler = handler;
254 if (st)
255 ffstream(st)->need_parsing = handler->need_parsing;
256 if (handler->priv_data_size) {
257 rtsp_st->dynamic_protocol_context = av_mallocz(handler->priv_data_size);
258 if (!rtsp_st->dynamic_protocol_context)
259 rtsp_st->dynamic_handler = NULL;
260 }
261 }
262
263 static void finalize_rtp_handler_init(AVFormatContext *s, RTSPStream *rtsp_st,
264 AVStream *st)
265 {
266 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->init) {
267 int ret = rtsp_st->dynamic_handler->init(s, st ? st->index : -1,
268 rtsp_st->dynamic_protocol_context);
269 if (ret < 0) {
270 if (rtsp_st->dynamic_protocol_context) {
271 if (rtsp_st->dynamic_handler->close)
272 rtsp_st->dynamic_handler->close(
273 rtsp_st->dynamic_protocol_context);
274 av_free(rtsp_st->dynamic_protocol_context);
275 }
276 rtsp_st->dynamic_protocol_context = NULL;
277 rtsp_st->dynamic_handler = NULL;
278 }
279 }
280 }
281
282 #if CONFIG_RTSP_DEMUXER
283 static int init_satip_stream(AVFormatContext *s)
284 {
285 RTSPState *rt = s->priv_data;
286 RTSPStream *rtsp_st = av_mallocz(sizeof(RTSPStream));
287 if (!rtsp_st)
288 return AVERROR(ENOMEM);
289 dynarray_add(&rt->rtsp_streams,
290 &rt->nb_rtsp_streams, rtsp_st);
291
292 rtsp_st->sdp_payload_type = 33; // MP2T
293 av_strlcpy(rtsp_st->control_url,
294 rt->control_uri, sizeof(rtsp_st->control_url));
295
296 if (rt->rtsp_flags & RTSP_FLAG_SATIP_RAW) {
297 AVStream *st = avformat_new_stream(s, NULL);
298 if (!st)
299 return AVERROR(ENOMEM);
300 st->id = rt->nb_rtsp_streams - 1;
301 rtsp_st->stream_index = st->index;
302 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
303 st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
304 } else {
305 rtsp_st->stream_index = -1;
306 init_rtp_handler(&ff_mpegts_dynamic_handler, rtsp_st, NULL);
307 finalize_rtp_handler_init(s, rtsp_st, NULL);
308 }
309 return 0;
310 }
311 #endif
312
313 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
314 static int sdp_parse_rtpmap(AVFormatContext *s,
315 AVStream *st, RTSPStream *rtsp_st,
316 int payload_type, const char *p)
317 {
318 AVCodecParameters *par = st->codecpar;
319 char buf[256];
320 int i;
321 const AVCodecDescriptor *desc;
322 const char *c_name;
323
324 /* See if we can handle this kind of payload.
325 * The space should normally not be there but some Real streams or
326 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
327 * have a trailing space. */
328 get_word_sep(buf, sizeof(buf), "/ ", &p);
329 if (payload_type < RTP_PT_PRIVATE) {
330 /* We are in a standard case
331 * (from http://www.iana.org/assignments/rtp-parameters). */
332 par->codec_id = ff_rtp_codec_id(buf, par->codec_type);
333 }
334
335 if (par->codec_id == AV_CODEC_ID_NONE) {
336 const RTPDynamicProtocolHandler *handler =
337 ff_rtp_handler_find_by_name(buf, par->codec_type);
338 init_rtp_handler(handler, rtsp_st, st);
339 /* If no dynamic handler was found, check with the list of standard
340 * allocated types, if such a stream for some reason happens to
341 * use a private payload type. This isn't handled in rtpdec.c, since
342 * the format name from the rtpmap line never is passed into rtpdec. */
343 if (!rtsp_st->dynamic_handler)
344 par->codec_id = ff_rtp_codec_id(buf, par->codec_type);
345 }
346
347 desc = avcodec_descriptor_get(par->codec_id);
348 if (desc && desc->name)
349 c_name = desc->name;
350 else
351 c_name = "(null)";
352
353 get_word_sep(buf, sizeof(buf), "/", &p);
354 i = atoi(buf);
355 switch (par->codec_type) {
356 case AVMEDIA_TYPE_AUDIO:
357 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
358 par->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
359 par->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
360 if (i > 0) {
361 par->sample_rate = i;
362 avpriv_set_pts_info(st, 32, 1, par->sample_rate);
363 get_word_sep(buf, sizeof(buf), "/", &p);
364 i = atoi(buf);
365 if (i > 0)
366 av_channel_layout_default(&par->ch_layout, i);
367 }
368 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
369 par->sample_rate);
370 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
371 par->ch_layout.nb_channels);
372 break;
373 case AVMEDIA_TYPE_VIDEO:
374 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
375 if (i > 0)
376 avpriv_set_pts_info(st, 32, 1, i);
377 break;
378 default:
379 break;
380 }
381 finalize_rtp_handler_init(s, rtsp_st, st);
382 return 0;
383 }
384
385 /* parse the attribute line from the fmtp a line of an sdp response. This
386 * is broken out as a function because it is used in rtp_h264.c, which is
387 * forthcoming. */
388 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
389 char *value, int value_size)
390 {
391 *p += strspn(*p, SPACE_CHARS);
392 if (**p) {
393 get_word_sep(attr, attr_size, "=", p);
394 if (**p == '=')
395 (*p)++;
396 get_word_sep(value, value_size, ";", p);
397 if (**p == ';')
398 (*p)++;
399 return 1;
400 }
401 return 0;
402 }
403
404 typedef struct SDPParseState {
405 /* SDP only */
406 struct sockaddr_storage default_ip;
407 int default_ttl;
408 int skip_media; ///< set if an unknown m= line occurs
409 int nb_default_include_source_addrs; /**< Number of source-specific multicast include source IP address (from SDP content) */
410 struct RTSPSource **default_include_source_addrs; /**< Source-specific multicast include source IP address (from SDP content) */
411 int nb_default_exclude_source_addrs; /**< Number of source-specific multicast exclude source IP address (from SDP content) */
412 struct RTSPSource **default_exclude_source_addrs; /**< Source-specific multicast exclude source IP address (from SDP content) */
413 int seen_rtpmap;
414 int seen_fmtp;
415 char delayed_fmtp[2048];
416 } SDPParseState;
417
418 static void copy_default_source_addrs(struct RTSPSource **addrs, int count,
419 struct RTSPSource ***dest, int *dest_count)
420 {
421 RTSPSource *rtsp_src, *rtsp_src2;
422 int i;
423 for (i = 0; i < count; i++) {
424 rtsp_src = addrs[i];
425 rtsp_src2 = av_memdup(rtsp_src, sizeof(*rtsp_src));
426 if (!rtsp_src2)
427 continue;
428 dynarray_add(dest, dest_count, rtsp_src2);
429 }
430 }
431
432 static void parse_fmtp(AVFormatContext *s, RTSPState *rt,
433 int payload_type, const char *line)
434 {
435 int i;
436
437 for (i = 0; i < rt->nb_rtsp_streams; i++) {
438 RTSPStream *rtsp_st = rt->rtsp_streams[i];
439 if (rtsp_st->sdp_payload_type == payload_type &&
440 rtsp_st->dynamic_handler &&
441 rtsp_st->dynamic_handler->parse_sdp_a_line) {
442 rtsp_st->dynamic_handler->parse_sdp_a_line(s, rtsp_st->stream_index,
443 rtsp_st->dynamic_protocol_context, line);
444 }
445 }
446 }
447
448 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
449 int letter, const char *buf)
450 {
451 RTSPState *rt = s->priv_data;
452 char buf1[64], st_type[64];
453 const char *p;
454 enum AVMediaType codec_type;
455 int payload_type;
456 AVStream *st;
457 RTSPStream *rtsp_st;
458 RTSPSource *rtsp_src;
459 struct sockaddr_storage sdp_ip;
460 int ttl;
461
462 av_log(s, AV_LOG_TRACE, "sdp: %c='%s'\n", letter, buf);
463
464 p = buf;
465 if (s1->skip_media && letter != 'm')
466 return;
467 switch (letter) {
468 case 'c':
469 get_word(buf1, sizeof(buf1), &p);
470 if (strcmp(buf1, "IN") != 0)
471 return;
472 get_word(buf1, sizeof(buf1), &p);
473 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
474 return;
475 get_word_sep(buf1, sizeof(buf1), "/", &p);
476 if (get_sockaddr(s, buf1, &sdp_ip))
477 return;
478 ttl = 16;
479 if (*p == '/') {
480 p++;
481 get_word_sep(buf1, sizeof(buf1), "/", &p);
482 ttl = atoi(buf1);
483 }
484 if (s->nb_streams == 0) {
485 s1->default_ip = sdp_ip;
486 s1->default_ttl = ttl;
487 } else {
488 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
489 rtsp_st->sdp_ip = sdp_ip;
490 rtsp_st->sdp_ttl = ttl;
491 }
492 break;
493 case 's':
494 av_dict_set(&s->metadata, "title", p, 0);
495 break;
496 case 'i':
497 if (s->nb_streams == 0) {
498 av_dict_set(&s->metadata, "comment", p, 0);
499 break;
500 }
501 break;
502 case 'm':
503 /* new stream */
504 s1->skip_media = 0;
505 s1->seen_fmtp = 0;
506 s1->seen_rtpmap = 0;
507 codec_type = AVMEDIA_TYPE_UNKNOWN;
508 get_word(st_type, sizeof(st_type), &p);
509 if (!strcmp(st_type, "audio")) {
510 codec_type = AVMEDIA_TYPE_AUDIO;
511 } else if (!strcmp(st_type, "video")) {
512 codec_type = AVMEDIA_TYPE_VIDEO;
513 } else if (!strcmp(st_type, "application")) {
514 codec_type = AVMEDIA_TYPE_DATA;
515 } else if (!strcmp(st_type, "text")) {
516 codec_type = AVMEDIA_TYPE_SUBTITLE;
517 }
518 if (codec_type == AVMEDIA_TYPE_UNKNOWN ||
519 !(rt->media_type_mask & (1 << codec_type)) ||
520 rt->nb_rtsp_streams >= s->max_streams
521 ) {
522 s1->skip_media = 1;
523 return;
524 }
525 rtsp_st = av_mallocz(sizeof(RTSPStream));
526 if (!rtsp_st)
527 return;
528 rtsp_st->stream_index = -1;
529 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
530
531 rtsp_st->sdp_ip = s1->default_ip;
532 rtsp_st->sdp_ttl = s1->default_ttl;
533
534 copy_default_source_addrs(s1->default_include_source_addrs,
535 s1->nb_default_include_source_addrs,
536 &rtsp_st->include_source_addrs,
537 &rtsp_st->nb_include_source_addrs);
538 copy_default_source_addrs(s1->default_exclude_source_addrs,
539 s1->nb_default_exclude_source_addrs,
540 &rtsp_st->exclude_source_addrs,
541 &rtsp_st->nb_exclude_source_addrs);
542
543 get_word(buf1, sizeof(buf1), &p); /* port */
544 rtsp_st->sdp_port = atoi(buf1);
545
546 get_word(buf1, sizeof(buf1), &p); /* protocol */
547 if (!strcmp(buf1, "udp"))
548 rt->transport = RTSP_TRANSPORT_RAW;
549 else if (strstr(buf1, "/AVPF") || strstr(buf1, "/SAVPF"))
550 rtsp_st->feedback = 1;
551
552 /* XXX: handle list of formats */
553 get_word(buf1, sizeof(buf1), &p); /* format list */
554 rtsp_st->sdp_payload_type = atoi(buf1);
555
556 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
557 /* no corresponding stream */
558 if (rt->transport == RTSP_TRANSPORT_RAW) {
559 if (CONFIG_RTPDEC && !rt->ts)
560 rt->ts = avpriv_mpegts_parse_open(s);
561 } else {
562 const RTPDynamicProtocolHandler *handler;
563 handler = ff_rtp_handler_find_by_id(
564 rtsp_st->sdp_payload_type, AVMEDIA_TYPE_DATA);
565 init_rtp_handler(handler, rtsp_st, NULL);
566 finalize_rtp_handler_init(s, rtsp_st, NULL);
567 }
568 } else if (rt->server_type == RTSP_SERVER_WMS &&
569 codec_type == AVMEDIA_TYPE_DATA) {
570 /* RTX stream, a stream that carries all the other actual
571 * audio/video streams. Don't expose this to the callers. */
572 } else {
573 st = avformat_new_stream(s, NULL);
574 if (!st)
575 return;
576 st->id = rt->nb_rtsp_streams - 1;
577 rtsp_st->stream_index = st->index;
578 st->codecpar->codec_type = codec_type;
579 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
580 const RTPDynamicProtocolHandler *handler;
581 /* if standard payload type, we can find the codec right now */
582 ff_rtp_get_codec_info(st->codecpar, rtsp_st->sdp_payload_type);
583 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
584 st->codecpar->sample_rate > 0)
585 avpriv_set_pts_info(st, 32, 1, st->codecpar->sample_rate);
586 /* Even static payload types may need a custom depacketizer */
587 handler = ff_rtp_handler_find_by_id(
588 rtsp_st->sdp_payload_type, st->codecpar->codec_type);
589 init_rtp_handler(handler, rtsp_st, st);
590 finalize_rtp_handler_init(s, rtsp_st, st);
591 }
592 if (rt->default_lang[0])
593 av_dict_set(&st->metadata, "language", rt->default_lang, 0);
594 }
595 /* put a default control url */
596 av_strlcpy(rtsp_st->control_url, rt->control_uri,
597 sizeof(rtsp_st->control_url));
598 break;
599 case 'a':
600 if (av_strstart(p, "control:", &p)) {
601 if (rt->nb_rtsp_streams == 0) {
602 if (!strncmp(p, "rtsp://", 7))
603 av_strlcpy(rt->control_uri, p,
604 sizeof(rt->control_uri));
605 } else {
606 char proto[32];
607 /* get the control url */
608 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
609
610 /* XXX: may need to add full url resolution */
611 av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
612 NULL, NULL, 0, p);
613 if (proto[0] == '\0') {
614 /* relative control URL */
615 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
616 av_strlcat(rtsp_st->control_url, "/",
617 sizeof(rtsp_st->control_url));
618 av_strlcat(rtsp_st->control_url, p,
619 sizeof(rtsp_st->control_url));
620 } else
621 av_strlcpy(rtsp_st->control_url, p,
622 sizeof(rtsp_st->control_url));
623 }
624 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
625 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
626 get_word(buf1, sizeof(buf1), &p);
627 payload_type = atoi(buf1);
628 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
629 if (rtsp_st->stream_index >= 0) {
630 st = s->streams[rtsp_st->stream_index];
631 sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
632 }
633 s1->seen_rtpmap = 1;
634 if (s1->seen_fmtp) {
635 parse_fmtp(s, rt, payload_type, s1->delayed_fmtp);
636 }
637 } else if (av_strstart(p, "fmtp:", &p) ||
638 av_strstart(p, "framesize:", &p)) {
639 // let dynamic protocol handlers have a stab at the line.
640 get_word(buf1, sizeof(buf1), &p);
641 payload_type = atoi(buf1);
642 if (s1->seen_rtpmap) {
643 parse_fmtp(s, rt, payload_type, buf);
644 } else {
645 s1->seen_fmtp = 1;
646 av_strlcpy(s1->delayed_fmtp, buf, sizeof(s1->delayed_fmtp));
647 }
648 } else if (av_strstart(p, "framerate:", &p) && s->nb_streams > 0) {
649 // RFC 8866
650 double framerate;
651 if (av_sscanf(p, "%lf%c", &framerate, &(char){0}) == 1) {
652 st = s->streams[s->nb_streams - 1];
653 st->avg_frame_rate = av_d2q(framerate, INT_MAX);
654 }
655 } else if (av_strstart(p, "ssrc:", &p) && s->nb_streams > 0) {
656 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
657 get_word(buf1, sizeof(buf1), &p);
658 rtsp_st->ssrc = strtoll(buf1, NULL, 10);
659 } else if (av_strstart(p, "range:", &p)) {
660 int64_t start, end;
661
662 // this is so that seeking on a streamed file can work.
663 rtsp_parse_range_npt(p, &start, &end);
664 s->start_time = start;
665 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
666 if (end != AV_NOPTS_VALUE)
667 s->duration = end - start;
668 } else if (av_strstart(p, "lang:", &p)) {
669 if (s->nb_streams > 0) {
670 get_word(buf1, sizeof(buf1), &p);
671 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
672 if (rtsp_st->stream_index >= 0) {
673 st = s->streams[rtsp_st->stream_index];
674 av_dict_set(&st->metadata, "language", buf1, 0);
675 }
676 } else
677 get_word(rt->default_lang, sizeof(rt->default_lang), &p);
678 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
679 if (atoi(p) == 1)
680 rt->transport = RTSP_TRANSPORT_RDT;
681 } else if (av_strstart(p, "SampleRate:integer;", &p) &&
682 s->nb_streams > 0) {
683 st = s->streams[s->nb_streams - 1];
684 st->codecpar->sample_rate = atoi(p);
685 } else if (av_strstart(p, "crypto:", &p) && s->nb_streams > 0) {
686 // RFC 4568
687 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
688 get_word(buf1, sizeof(buf1), &p); // ignore tag
689 get_word(rtsp_st->crypto_suite, sizeof(rtsp_st->crypto_suite), &p);
690 p += strspn(p, SPACE_CHARS);
691 if (av_strstart(p, "inline:", &p))
692 get_word(rtsp_st->crypto_params, sizeof(rtsp_st->crypto_params), &p);
693 } else if (av_strstart(p, "source-filter:", &p)) {
694 int exclude = 0;
695 get_word(buf1, sizeof(buf1), &p);
696 if (strcmp(buf1, "incl") && strcmp(buf1, "excl"))
697 return;
698 exclude = !strcmp(buf1, "excl");
699
700 get_word(buf1, sizeof(buf1), &p);
701 if (strcmp(buf1, "IN") != 0)
702 return;
703 get_word(buf1, sizeof(buf1), &p);
704 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6") && strcmp(buf1, "*"))
705 return;
706 // not checking that the destination address actually matches or is wildcard
707 get_word(buf1, sizeof(buf1), &p);
708
709 while (*p != '\0') {
710 rtsp_src = av_mallocz(sizeof(*rtsp_src));
711 if (!rtsp_src)
712 return;
713 get_word(rtsp_src->addr, sizeof(rtsp_src->addr), &p);
714 if (exclude) {
715 if (s->nb_streams == 0) {
716 dynarray_add(&s1->default_exclude_source_addrs, &s1->nb_default_exclude_source_addrs, rtsp_src);
717 } else {
718 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
719 dynarray_add(&rtsp_st->exclude_source_addrs, &rtsp_st->nb_exclude_source_addrs, rtsp_src);
720 }
721 } else {
722 if (s->nb_streams == 0) {
723 dynarray_add(&s1->default_include_source_addrs, &s1->nb_default_include_source_addrs, rtsp_src);
724 } else {
725 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
726 dynarray_add(&rtsp_st->include_source_addrs, &rtsp_st->nb_include_source_addrs, rtsp_src);
727 }
728 }
729 }
730 } else {
731 if (rt->server_type == RTSP_SERVER_WMS)
732 ff_wms_parse_sdp_a_line(s, p);
733 if (s->nb_streams > 0) {
734 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
735
736 if (rt->server_type == RTSP_SERVER_REAL)
737 ff_real_parse_sdp_a_line(s, rtsp_st->stream_index, p);
738
739 if (rtsp_st->dynamic_handler &&
740 rtsp_st->dynamic_handler->parse_sdp_a_line)
741 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
742 rtsp_st->stream_index,
743 rtsp_st->dynamic_protocol_context, buf);
744 }
745 }
746 break;
747 }
748 }
749
750 int ff_sdp_parse(AVFormatContext *s, const char *content)
751 {
752 const char *p;
753 int letter, i;
754 char buf[SDP_MAX_SIZE], *q;
755 SDPParseState sdp_parse_state = { { 0 } }, *s1 = &sdp_parse_state;
756
757 s->duration = AV_NOPTS_VALUE;
758
759 p = content;
760 for (;;) {
761 p += strspn(p, SPACE_CHARS);
762 letter = *p;
763 if (letter == '\0')
764 break;
765 p++;
766 if (*p != '=')
767 goto next_line;
768 p++;
769 /* get the content */
770 q = buf;
771 while (*p != '\n' && *p != '\r' && *p != '\0') {
772 if ((q - buf) < sizeof(buf) - 1)
773 *q++ = *p;
774 p++;
775 }
776 *q = '\0';
777 sdp_parse_line(s, s1, letter, buf);
778 next_line:
779 while (*p != '\n' && *p != '\0')
780 p++;
781 if (*p == '\n')
782 p++;
783 }
784
785 for (i = 0; i < s1->nb_default_include_source_addrs; i++)
786 av_freep(&s1->default_include_source_addrs[i]);
787 av_freep(&s1->default_include_source_addrs);
788 for (i = 0; i < s1->nb_default_exclude_source_addrs; i++)
789 av_freep(&s1->default_exclude_source_addrs[i]);
790 av_freep(&s1->default_exclude_source_addrs);
791
792 if (s->duration == AV_NOPTS_VALUE)
793 s->ctx_flags |= AVFMTCTX_UNSEEKABLE;
794
795 return 0;
796 }
797 #endif /* CONFIG_RTPDEC */
798
799 void ff_rtsp_undo_setup(AVFormatContext *s, int send_packets)
800 {
801 RTSPState *rt = s->priv_data;
802 int i;
803
804 for (i = 0; i < rt->nb_rtsp_streams; i++) {
805 RTSPStream *rtsp_st = rt->rtsp_streams[i];
806 if (!rtsp_st)
807 continue;
808 if (rtsp_st->transport_priv) {
809 if (s->oformat) {
810 AVFormatContext *rtpctx = rtsp_st->transport_priv;
811 av_write_trailer(rtpctx);
812 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
813 if (CONFIG_RTSP_MUXER && rtpctx->pb && send_packets)
814 ff_rtsp_tcp_write_packet(s, rtsp_st);
815 ffio_free_dyn_buf(&rtpctx->pb);
816 } else {
817 avio_closep(&rtpctx->pb);
818 }
819 avformat_free_context(rtpctx);
820 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT)
821 ff_rdt_parse_close(rtsp_st->transport_priv);
822 else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP)
823 ff_rtp_parse_close(rtsp_st->transport_priv);
824 }
825 rtsp_st->transport_priv = NULL;
826 ffurl_closep(&rtsp_st->rtp_handle);
827 }
828 }
829
830 /* close and free RTSP streams */
831 void ff_rtsp_close_streams(AVFormatContext *s)
832 {
833 RTSPState *rt = s->priv_data;
834 int i, j;
835 RTSPStream *rtsp_st;
836
837 ff_rtsp_undo_setup(s, 0);
838 for (i = 0; i < rt->nb_rtsp_streams; i++) {
839 rtsp_st = rt->rtsp_streams[i];
840 if (rtsp_st) {
841 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context) {
842 if (rtsp_st->dynamic_handler->close)
843 rtsp_st->dynamic_handler->close(
844 rtsp_st->dynamic_protocol_context);
845 av_free(rtsp_st->dynamic_protocol_context);
846 }
847 for (j = 0; j < rtsp_st->nb_include_source_addrs; j++)
848 av_freep(&rtsp_st->include_source_addrs[j]);
849 av_freep(&rtsp_st->include_source_addrs);
850 for (j = 0; j < rtsp_st->nb_exclude_source_addrs; j++)
851 av_freep(&rtsp_st->exclude_source_addrs[j]);
852 av_freep(&rtsp_st->exclude_source_addrs);
853
854 av_freep(&rtsp_st);
855 }
856 }
857 av_freep(&rt->rtsp_streams);
858 if (rt->asf_ctx) {
859 avformat_close_input(&rt->asf_ctx);
860 }
861 if (CONFIG_RTPDEC && rt->ts)
862 avpriv_mpegts_parse_close(rt->ts);
863 av_freep(&rt->p);
864 av_freep(&rt->recvbuf);
865 }
866
867 int ff_rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
868 {
869 RTSPState *rt = s->priv_data;
870 AVStream *st = NULL;
871 int reordering_queue_size = rt->reordering_queue_size;
872 if (reordering_queue_size < 0) {
873 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
874 reordering_queue_size = 0;
875 else
876 reordering_queue_size = RTP_REORDER_QUEUE_DEFAULT_SIZE;
877 }
878
879 /* open the RTP context */
880 if (rtsp_st->stream_index >= 0)
881 st = s->streams[rtsp_st->stream_index];
882 if (!st)
883 s->ctx_flags |= AVFMTCTX_NOHEADER;
884
885 if (CONFIG_RTSP_MUXER && s->oformat && st) {
886 int ret = ff_rtp_chain_mux_open((AVFormatContext **)&rtsp_st->transport_priv,
887 s, st, rtsp_st->rtp_handle,
888 rt->pkt_size,
889 rtsp_st->stream_index);
890 /* Ownership of rtp_handle is passed to the rtp mux context */
891 rtsp_st->rtp_handle = NULL;
892 if (ret < 0)
893 return ret;
894 st->time_base = ((AVFormatContext*)rtsp_st->transport_priv)->streams[0]->time_base;
895 } else if (rt->transport == RTSP_TRANSPORT_RAW) {
896 return 0; // Don't need to open any parser here
897 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT && st)
898 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
899 rtsp_st->dynamic_protocol_context,
900 rtsp_st->dynamic_handler);
901 else if (CONFIG_RTPDEC)
902 rtsp_st->transport_priv = ff_rtp_parse_open(s, st,
903 rtsp_st->sdp_payload_type,
904 reordering_queue_size);
905
906 if (!rtsp_st->transport_priv) {
907 return AVERROR(ENOMEM);
908 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP &&
909 s->iformat) {
910 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
911 rtpctx->ssrc = rtsp_st->ssrc;
912 if (rtsp_st->dynamic_handler) {
913 ff_rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
914 rtsp_st->dynamic_protocol_context,
915 rtsp_st->dynamic_handler);
916 }
917 if (rtsp_st->crypto_suite[0])
918 ff_rtp_parse_set_crypto(rtsp_st->transport_priv,
919 rtsp_st->crypto_suite,
920 rtsp_st->crypto_params);
921 }
922
923 return 0;
924 }
925
926 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
927 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
928 {
929 const char *q;
930 char *p;
931 int v;
932
933 q = *pp;
934 q += strspn(q, SPACE_CHARS);
935 v = strtol(q, &p, 10);
936 if (*p == '-') {
937 p++;
938 *min_ptr = v;
939 v = strtol(p, &p, 10);
940 *max_ptr = v;
941 } else {
942 *min_ptr = v;
943 *max_ptr = v;
944 }
945 *pp = p;
946 }
947
948 /* XXX: only one transport specification is parsed */
949 static void rtsp_parse_transport(AVFormatContext *s,
950 RTSPMessageHeader *reply, const char *p)
951 {
952 char transport_protocol[16];
953 char profile[16];
954 char lower_transport[16];
955 char parameter[16];
956 RTSPTransportField *th;
957 char buf[256];
958
959 reply->nb_transports = 0;
960
961 for (;;) {
962 p += strspn(p, SPACE_CHARS);
963 if (*p == '\0')
964 break;
965
966 th = &reply->transports[reply->nb_transports];
967
968 get_word_sep(transport_protocol, sizeof(transport_protocol),
969 "/", &p);
970 if (!av_strcasecmp (transport_protocol, "rtp")) {
971 get_word_sep(profile, sizeof(profile), "/;,", &p);
972 lower_transport[0] = '\0';
973 /* rtp/avp/<protocol> */
974 if (*p == '/') {
975 get_word_sep(lower_transport, sizeof(lower_transport),
976 ";,", &p);
977 }
978 th->transport = RTSP_TRANSPORT_RTP;
979 } else if (!av_strcasecmp (transport_protocol, "x-pn-tng") ||
980 !av_strcasecmp (transport_protocol, "x-real-rdt")) {
981 /* x-pn-tng/<protocol> */
982 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
983 profile[0] = '\0';
984 th->transport = RTSP_TRANSPORT_RDT;
985 } else if (!av_strcasecmp(transport_protocol, "raw")) {
986 get_word_sep(profile, sizeof(profile), "/;,", &p);
987 lower_transport[0] = '\0';
988 /* raw/raw/<protocol> */
989 if (*p == '/') {
990 get_word_sep(lower_transport, sizeof(lower_transport),
991 ";,", &p);
992 }
993 th->transport = RTSP_TRANSPORT_RAW;
994 } else {
995 break;
996 }
997 if (!av_strcasecmp(lower_transport, "TCP"))
998 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
999 else
1000 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
1001
1002 if (*p == ';')
1003 p++;
1004 /* get each parameter */
1005 while (*p != '\0' && *p != ',') {
1006 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
1007 if (!strcmp(parameter, "port")) {
1008 if (*p == '=') {
1009 p++;
1010 rtsp_parse_range(&th->port_min, &th->port_max, &p);
1011 }
1012 } else if (!strcmp(parameter, "client_port")) {
1013 if (*p == '=') {
1014 p++;
1015 rtsp_parse_range(&th->client_port_min,
1016 &th->client_port_max, &p);
1017 }
1018 } else if (!strcmp(parameter, "server_port")) {
1019 if (*p == '=') {
1020 p++;
1021 rtsp_parse_range(&th->server_port_min,
1022 &th->server_port_max, &p);
1023 }
1024 } else if (!strcmp(parameter, "interleaved")) {
1025 if (*p == '=') {
1026 p++;
1027 rtsp_parse_range(&th->interleaved_min,
1028 &th->interleaved_max, &p);
1029 }
1030 } else if (!strcmp(parameter, "multicast")) {
1031 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
1032 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
1033 } else if (!strcmp(parameter, "ttl")) {
1034 if (*p == '=') {
1035 char *end;
1036 p++;
1037 th->ttl = strtol(p, &end, 10);
1038 p = end;
1039 }
1040 } else if (!strcmp(parameter, "destination")) {
1041 if (*p == '=') {
1042 p++;
1043 get_word_sep(buf, sizeof(buf), ";,", &p);
1044 get_sockaddr(s, buf, &th->destination);
1045 }
1046 } else if (!strcmp(parameter, "source")) {
1047 if (*p == '=') {
1048 p++;
1049 get_word_sep(buf, sizeof(buf), ";,", &p);
1050 av_strlcpy(th->source, buf, sizeof(th->source));
1051 }
1052 } else if (!strcmp(parameter, "mode")) {
1053 if (*p == '=') {
1054 p++;
1055 get_word_sep(buf, sizeof(buf), ";, ", &p);
1056 if (!av_strcasecmp(buf, "record") ||
1057 !av_strcasecmp(buf, "receive"))
1058 th->mode_record = 1;
1059 }
1060 }
1061
1062 while (*p != ';' && *p != '\0' && *p != ',')
1063 p++;
1064 if (*p == ';')
1065 p++;
1066 }
1067 if (*p == ',')
1068 p++;
1069
1070 reply->nb_transports++;
1071 if (reply->nb_transports >= RTSP_MAX_TRANSPORTS)
1072 break;
1073 }
1074 }
1075
1076 static void handle_rtp_info(RTSPState *rt, const char *url,
1077 uint32_t seq, uint32_t rtptime)
1078 {
1079 int i;
1080 if (!rtptime || !url[0])
1081 return;
1082 if (rt->transport != RTSP_TRANSPORT_RTP)
1083 return;
1084 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1085 RTSPStream *rtsp_st = rt->rtsp_streams[i];
1086 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1087 if (!rtpctx)
1088 continue;
1089 if (!strcmp(rtsp_st->control_url, url)) {
1090 rtpctx->base_timestamp = rtptime;
1091 break;
1092 }
1093 }
1094 }
1095
1096 static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
1097 {
1098 int read = 0;
1099 char key[20], value[MAX_URL_SIZE], url[MAX_URL_SIZE] = "";
1100 uint32_t seq = 0, rtptime = 0;
1101
1102 for (;;) {
1103 p += strspn(p, SPACE_CHARS);
1104 if (!*p)
1105 break;
1106 get_word_sep(key, sizeof(key), "=", &p);
1107 if (*p != '=')
1108 break;
1109 p++;
1110 get_word_sep(value, sizeof(value), ";, ", &p);
1111 read++;
1112 if (!strcmp(key, "url"))
1113 av_strlcpy(url, value, sizeof(url));
1114 else if (!strcmp(key, "seq"))
1115 seq = strtoul(value, NULL, 10);
1116 else if (!strcmp(key, "rtptime"))
1117 rtptime = strtoul(value, NULL, 10);
1118 if (*p == ',') {
1119 handle_rtp_info(rt, url, seq, rtptime);
1120 url[0] = '\0';
1121 seq = rtptime = 0;
1122 read = 0;
1123 }
1124 if (*p)
1125 p++;
1126 }
1127 if (read > 0)
1128 handle_rtp_info(rt, url, seq, rtptime);
1129 }
1130
1131 void ff_rtsp_parse_line(AVFormatContext *s,
1132 RTSPMessageHeader *reply, const char *buf,
1133 RTSPState *rt, const char *method)
1134 {
1135 const char *p;
1136
1137 /* NOTE: we do case independent match for broken servers */
1138 p = buf;
1139 if (av_stristart(p, "Session:", &p)) {
1140 int t;
1141 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
1142 if (av_stristart(p, ";timeout=", &p) &&
1143 (t = strtol(p, NULL, 10)) > 0) {
1144 reply->timeout = t;
1145 }
1146 } else if (av_stristart(p, "Content-Length:", &p)) {
1147 reply->content_length = strtol(p, NULL, 10);
1148 } else if (av_stristart(p, "Transport:", &p)) {
1149 rtsp_parse_transport(s, reply, p);
1150 } else if (av_stristart(p, "CSeq:", &p)) {
1151 reply->seq = strtol(p, NULL, 10);
1152 } else if (av_stristart(p, "Range:", &p)) {
1153 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
1154 } else if (av_stristart(p, "RealChallenge1:", &p)) {
1155 p += strspn(p, SPACE_CHARS);
1156 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
1157 } else if (av_stristart(p, "Server:", &p)) {
1158 p += strspn(p, SPACE_CHARS);
1159 av_strlcpy(reply->server, p, sizeof(reply->server));
1160 } else if (av_stristart(p, "Notice:", &p) ||
1161 av_stristart(p, "X-Notice:", &p)) {
1162 reply->notice = strtol(p, NULL, 10);
1163 } else if (av_stristart(p, "Location:", &p)) {
1164 p += strspn(p, SPACE_CHARS);
1165 av_strlcpy(reply->location, p , sizeof(reply->location));
1166 } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
1167 p += strspn(p, SPACE_CHARS);
1168 ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
1169 } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
1170 p += strspn(p, SPACE_CHARS);
1171 ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
1172 } else if (av_stristart(p, "Content-Base:", &p) && rt) {
1173 p += strspn(p, SPACE_CHARS);
1174 if (method && !strcmp(method, "DESCRIBE"))
1175 av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
1176 } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
1177 p += strspn(p, SPACE_CHARS);
1178 if (method && !strcmp(method, "PLAY"))
1179 rtsp_parse_rtp_info(rt, p);
1180 } else if (av_stristart(p, "Public:", &p) && rt) {
1181 if (strstr(p, "GET_PARAMETER") &&
1182 method && !strcmp(method, "OPTIONS"))
1183 rt->get_parameter_supported = 1;
1184 } else if (av_stristart(p, "x-Accept-Dynamic-Rate:", &p) && rt) {
1185 p += strspn(p, SPACE_CHARS);
1186 rt->accept_dynamic_rate = atoi(p);
1187 } else if (av_stristart(p, "Content-Type:", &p)) {
1188 p += strspn(p, SPACE_CHARS);
1189 av_strlcpy(reply->content_type, p, sizeof(reply->content_type));
1190 } else if (av_stristart(p, "com.ses.streamID:", &p)) {
1191 p += strspn(p, SPACE_CHARS);
1192 av_strlcpy(reply->stream_id, p, sizeof(reply->stream_id));
1193 }
1194 }
1195
1196 /* skip a RTP/TCP interleaved packet */
1197 int ff_rtsp_skip_packet(AVFormatContext *s)
1198 {
1199 RTSPState *rt = s->priv_data;
1200 int ret, len, len1;
1201 uint8_t buf[MAX_URL_SIZE];
1202
1203 ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
1204 if (ret != 3)
1205 return ret < 0 ? ret : AVERROR(EIO);
1206 len = AV_RB16(buf + 1);
1207
1208 av_log(s, AV_LOG_TRACE, "skipping RTP packet len=%d\n", len);
1209
1210 /* skip payload */
1211 while (len > 0) {
1212 len1 = len;
1213 if (len1 > sizeof(buf))
1214 len1 = sizeof(buf);
1215 ret = ffurl_read_complete(rt->rtsp_hd, buf, len1);
1216 if (ret != len1)
1217 return ret < 0 ? ret : AVERROR(EIO);
1218 len -= len1;
1219 }
1220
1221 return 0;
1222 }
1223
1224 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
1225 unsigned char **content_ptr,
1226 int return_on_interleaved_data, const char *method)
1227 {
1228 RTSPState *rt = s->priv_data;
1229 char buf[MAX_URL_SIZE], buf1[MAX_URL_SIZE], *q;
1230 unsigned char ch;
1231 const char *p;
1232 int ret, content_length, line_count, request;
1233 unsigned char *content;
1234
1235 start:
1236 line_count = 0;
1237 request = 0;
1238 content = NULL;
1239 memset(reply, 0, sizeof(*reply));
1240
1241 /* parse reply (XXX: use buffers) */
1242 rt->last_reply[0] = '\0';
1243 for (;;) {
1244 q = buf;
1245 for (;;) {
1246 ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1);
1247 if (ret != 1) {
1248 ret = (ret < 0) ? ret : AVERROR(EIO);
1249 av_log(s, AV_LOG_WARNING, "Failed reading RTSP data: %s\n", av_err2str(ret));
1250 return ret;
1251 }
1252 av_log(s, AV_LOG_TRACE, "ret=%d c=%02x [%c]\n", ret, ch, ch);
1253 if (ch == '\n')
1254 break;
1255 if (ch == '$' && q == buf) {
1256 if (return_on_interleaved_data) {
1257 return 1;
1258 } else {
1259 ret = ff_rtsp_skip_packet(s);
1260 if (ret < 0)
1261 return ret;
1262 }
1263 } else if (ch != '\r') {
1264 if ((q - buf) < sizeof(buf) - 1)
1265 *q++ = ch;
1266 }
1267 }
1268 *q = '\0';
1269
1270 av_log(s, AV_LOG_TRACE, "line='%s'\n", buf);
1271
1272 /* test if last line */
1273 if (buf[0] == '\0')
1274 break;
1275 p = buf;
1276 if (line_count == 0) {
1277 /* get reply code */
1278 get_word(buf1, sizeof(buf1), &p);
1279 if (!strncmp(buf1, "RTSP/", 5)) {
1280 get_word(buf1, sizeof(buf1), &p);
1281 reply->status_code = atoi(buf1);
1282 p += strspn(p, SPACE_CHARS);
1283 av_strlcpy(reply->reason, p, sizeof(reply->reason));
1284 } else {
1285 av_strlcpy(reply->reason, buf1, sizeof(reply->reason)); // method
1286 get_word(buf1, sizeof(buf1), &p); // object
1287 request = 1;
1288 }
1289 } else {
1290 ff_rtsp_parse_line(s, reply, p, rt, method);
1291 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
1292 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1293 }
1294 line_count++;
1295 }
1296
1297 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0' && !request)
1298 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
1299
1300 content_length = reply->content_length;
1301 if (content_length > 0) {
1302 /* leave some room for a trailing '\0' (useful for simple parsing) */
1303 content = av_malloc(content_length + 1);
1304 if (!content)
1305 return AVERROR(ENOMEM);
1306 if ((ret = ffurl_read_complete(rt->rtsp_hd, content, content_length)) != content_length) {
1307 av_freep(&content);
1308 return ret < 0 ? ret : AVERROR(EIO);
1309 }
1310 content[content_length] = '\0';
1311 }
1312 if (content_ptr)
1313 *content_ptr = content;
1314 else
1315 av_freep(&content);
1316
1317 if (request) {
1318 char buf[MAX_URL_SIZE];
1319 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1320 const char* ptr = buf;
1321
1322 if (!strcmp(reply->reason, "OPTIONS") ||
1323 !strcmp(reply->reason, "GET_PARAMETER")) {
1324 snprintf(buf, sizeof(buf), "RTSP/1.0 200 OK\r\n");
1325 if (reply->seq)
1326 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", reply->seq);
1327 if (reply->session_id[0])
1328 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n",
1329 reply->session_id);
1330 } else {
1331 snprintf(buf, sizeof(buf), "RTSP/1.0 501 Not Implemented\r\n");
1332 }
1333 av_strlcat(buf, "\r\n", sizeof(buf));
1334
1335 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1336 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1337 ptr = base64buf;
1338 }
1339 ffurl_write(rt->rtsp_hd_out, ptr, strlen(ptr));
1340
1341 rt->last_cmd_time = av_gettime_relative();
1342 /* Even if the request from the server had data, it is not the data
1343 * that the caller wants or expects. The memory could also be leaked
1344 * if the actual following reply has content data. */
1345 if (content_ptr)
1346 av_freep(content_ptr);
1347 /* If method is set, this is called from ff_rtsp_send_cmd,
1348 * where a reply to exactly this request is awaited. For
1349 * callers from within packet receiving, we just want to
1350 * return to the caller and go back to receiving packets. */
1351 if (method)
1352 goto start;
1353 return 0;
1354 }
1355
1356 if (rt->seq != reply->seq) {
1357 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
1358 rt->seq, reply->seq);
1359 }
1360
1361 /* EOS */
1362 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
1363 reply->notice == 2104 /* Start-of-Stream Reached */ ||
1364 reply->notice == 2306 /* Continuous Feed Terminated */) {
1365 rt->state = RTSP_STATE_IDLE;
1366 } else if (reply->notice >= 4400 && reply->notice < 5500) {
1367 return AVERROR(EIO); /* data or server error */
1368 } else if (reply->notice == 2401 /* Ticket Expired */ ||
1369 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
1370 return AVERROR(EPERM);
1371
1372 return 0;
1373 }
1374
1375 /**
1376 * Send a command to the RTSP server without waiting for the reply.
1377 *
1378 * @param s RTSP (de)muxer context
1379 * @param method the method for the request
1380 * @param url the target url for the request
1381 * @param headers extra header lines to include in the request
1382 * @param send_content if non-null, the data to send as request body content
1383 * @param send_content_length the length of the send_content data, or 0 if
1384 * send_content is null
1385 *
1386 * @return zero if success, nonzero otherwise
1387 */
1388 static int rtsp_send_cmd_with_content_async(AVFormatContext *s,
1389 const char *method, const char *url,
1390 const char *headers,
1391 const unsigned char *send_content,
1392 int send_content_length)
1393 {
1394 RTSPState *rt = s->priv_data;
1395 char buf[MAX_URL_SIZE], *out_buf;
1396 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1397
1398 if (!rt->rtsp_hd_out)
1399 return AVERROR(ENOTCONN);
1400
1401 /* Add in RTSP headers */
1402 out_buf = buf;
1403 rt->seq++;
1404 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
1405 if (headers)
1406 av_strlcat(buf, headers, sizeof(buf));
1407 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
1408 av_strlcatf(buf, sizeof(buf), "User-Agent: %s\r\n", rt->user_agent);
1409 if (rt->session_id[0] != '\0' && (!headers ||
1410 !strstr(headers, "\nIf-Match:"))) {
1411 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
1412 }
1413 if (rt->auth[0]) {
1414 char *str = ff_http_auth_create_response(&rt->auth_state,
1415 rt->auth, url, method);
1416 if (str)
1417 av_strlcat(buf, str, sizeof(buf));
1418 av_free(str);
1419 }
1420 if (send_content_length > 0 && send_content)
1421 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
1422 av_strlcat(buf, "\r\n", sizeof(buf));
1423
1424 /* base64 encode rtsp if tunneling */
1425 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1426 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1427 out_buf = base64buf;
1428 }
1429
1430 av_log(s, AV_LOG_TRACE, "Sending:\n%s--\n", buf);
1431
1432 ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
1433 if (send_content_length > 0 && send_content) {
1434 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1435 avpriv_report_missing_feature(s, "Tunneling of RTSP requests with content data");
1436 return AVERROR_PATCHWELCOME;
1437 }
1438 ffurl_write(rt->rtsp_hd_out, send_content, send_content_length);
1439 }
1440 rt->last_cmd_time = av_gettime_relative();
1441
1442 return 0;
1443 }
1444
1445 int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1446 const char *url, const char *headers)
1447 {
1448 return rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1449 }
1450
1451 int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1452 const char *headers, RTSPMessageHeader *reply,
1453 unsigned char **content_ptr)
1454 {
1455 return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1456 content_ptr, NULL, 0);
1457 }
1458
1459 int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1460 const char *method, const char *url,
1461 const char *header,
1462 RTSPMessageHeader *reply,
1463 unsigned char **content_ptr,
1464 const unsigned char *send_content,
1465 int send_content_length)
1466 {
1467 RTSPState *rt = s->priv_data;
1468 HTTPAuthType cur_auth_type;
1469 int ret, attempts = 0;
1470
1471 retry:
1472 cur_auth_type = rt->auth_state.auth_type;
1473 if ((ret = rtsp_send_cmd_with_content_async(s, method, url, header,
1474 send_content,
1475 send_content_length)) < 0)
1476 return ret;
1477
1478 if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1479 return ret;
1480 attempts++;
1481
1482 if (reply->status_code == 401 &&
1483 (cur_auth_type == HTTP_AUTH_NONE || rt->auth_state.stale) &&
1484 rt->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2)
1485 goto retry;
1486
1487 if (reply->status_code > 400){
1488 av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1489 method,
1490 reply->status_code,
1491 reply->reason);
1492 av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1493 }
1494
1495 return 0;
1496 }
1497
1498 int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1499 int lower_transport, const char *real_challenge)
1500 {
1501 RTSPState *rt = s->priv_data;
1502 int rtx = 0, j, i, err, interleave = 0, port_off = 0;
1503 RTSPStream *rtsp_st;
1504 RTSPMessageHeader reply1, *reply = &reply1;
1505 char cmd[MAX_URL_SIZE];
1506 const char *trans_pref;
1507
1508 memset(&reply1, 0, sizeof(reply1));
1509
1510 if (rt->transport == RTSP_TRANSPORT_RDT)
1511 trans_pref = "x-pn-tng";
1512 else if (rt->transport == RTSP_TRANSPORT_RAW)
1513 trans_pref = "RAW/RAW";
1514 else
1515 trans_pref = "RTP/AVP";
1516
1517 /* default timeout: 1 minute */
1518 rt->timeout = 60;
1519
1520 /* Choose a random starting offset within the first half of the
1521 * port range, to allow for a number of ports to try even if the offset
1522 * happens to be at the end of the random range. */
1523 if (rt->rtp_port_max - rt->rtp_port_min >= 4) {
1524 port_off = av_get_random_seed() % ((rt->rtp_port_max - rt->rtp_port_min)/2);
1525 /* even random offset */
1526 port_off -= port_off & 0x01;
1527 }
1528
1529 for (j = rt->rtp_port_min + port_off, i = 0; i < rt->nb_rtsp_streams; ++i) {
1530 char transport[MAX_URL_SIZE];
1531
1532 /*
1533 * WMS serves all UDP data over a single connection, the RTX, which
1534 * isn't necessarily the first in the SDP but has to be the first
1535 * to be set up, else the second/third SETUP will fail with a 461.
1536 */
1537 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1538 rt->server_type == RTSP_SERVER_WMS) {
1539 if (i == 0) {
1540 /* rtx first */
1541 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1542 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1543 if (len >= 4 &&
1544 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1545 "/rtx"))
1546 break;
1547 }
1548 if (rtx == rt->nb_rtsp_streams)
1549 return -1; /* no RTX found */
1550 rtsp_st = rt->rtsp_streams[rtx];
1551 } else
1552 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1553 } else
1554 rtsp_st = rt->rtsp_streams[i];
1555
1556 /* RTP/UDP */
1557 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1558 char buf[256];
1559
1560 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1561 port = reply->transports[0].client_port_min;
1562 goto have_port;
1563 }
1564
1565 /* first try in specified port range */
1566 while (j + 1 <= rt->rtp_port_max) {
1567 AVDictionary *opts = map_to_opts(rt);
1568
1569 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1570 "?localport=%d", j);
1571 /* we will use two ports per rtp stream (rtp and rtcp) */
1572 j += 2;
1573 err = ffurl_open_whitelist(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE,
1574 &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
1575
1576 av_dict_free(&opts);
1577
1578 if (!err)
1579 goto rtp_opened;
1580 }
1581 av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1582 err = AVERROR(EIO);
1583 goto fail;
1584
1585 rtp_opened:
1586 port = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1587 have_port:
1588 av_strlcpy(transport, trans_pref, sizeof(transport));
1589 av_strlcat(transport,
1590 rt->server_type == RTSP_SERVER_SATIP ? ";" : "/UDP;",
1591 sizeof(transport));
1592 if (rt->server_type != RTSP_SERVER_REAL)
1593 av_strlcat(transport, "unicast;", sizeof(transport));
1594 av_strlcatf(transport, sizeof(transport),
1595 "client_port=%d", port);
1596 if (rt->transport == RTSP_TRANSPORT_RTP &&
1597 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1598 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1599 }
1600
1601 /* RTP/TCP */
1602 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1603 /* For WMS streams, the application streams are only used for
1604 * UDP. When trying to set it up for TCP streams, the server
1605 * will return an error. Therefore, we skip those streams. */
1606 if (rt->server_type == RTSP_SERVER_WMS &&
1607 (rtsp_st->stream_index < 0 ||
1608 s->streams[rtsp_st->stream_index]->codecpar->codec_type ==
1609 AVMEDIA_TYPE_DATA))
1610 continue;
1611 snprintf(transport, sizeof(transport) - 1,
1612 "%s/TCP;", trans_pref);
1613 if (rt->transport != RTSP_TRANSPORT_RDT)
1614 av_strlcat(transport, "unicast;", sizeof(transport));
1615 av_strlcatf(transport, sizeof(transport),
1616 "interleaved=%d-%d",
1617 interleave, interleave + 1);
1618 interleave += 2;
1619 }
1620
1621 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1622 snprintf(transport, sizeof(transport) - 1,
1623 "%s/UDP;multicast", trans_pref);
1624 } else {
1625 err = AVERROR(EINVAL);
1626 goto fail; // transport would be uninitialized
1627 }
1628
1629 if (s->oformat) {
1630 av_strlcat(transport, ";mode=record", sizeof(transport));
1631 } else if (rt->server_type == RTSP_SERVER_REAL ||
1632 rt->server_type == RTSP_SERVER_WMS)
1633 av_strlcat(transport, ";mode=play", sizeof(transport));
1634 snprintf(cmd, sizeof(cmd),
1635 "Transport: %s\r\n",
1636 transport);
1637 if (rt->accept_dynamic_rate)
1638 av_strlcat(cmd, "x-Dynamic-Rate: 0\r\n", sizeof(cmd));
1639 if (CONFIG_RTPDEC && i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1640 char real_res[41], real_csum[9];
1641 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1642 real_challenge);
1643 av_strlcatf(cmd, sizeof(cmd),
1644 "If-Match: %s\r\n"
1645 "RealChallenge2: %s, sd=%s\r\n",
1646 rt->session_id, real_res, real_csum);
1647 }
1648 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1649 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1650 err = 1;
1651 goto fail;
1652 } else if (reply->status_code != RTSP_STATUS_OK ||
1653 reply->nb_transports != 1) {
1654 err = ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
1655 goto fail;
1656 }
1657
1658 if (rt->server_type == RTSP_SERVER_SATIP && reply->stream_id[0]) {
1659 char proto[128], host[128], path[512], auth[128];
1660 int port;
1661 av_url_split(proto, sizeof(proto), auth, sizeof(auth), host, sizeof(host),
1662 &port, path, sizeof(path), rt->control_uri);
1663 ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL, host,
1664 port, "/stream=%s", reply->stream_id);
1665 }
1666
1667 /* XXX: same protocol for all streams is required */
1668 if (i > 0) {
1669 if (reply->transports[0].lower_transport != rt->lower_transport ||
1670 reply->transports[0].transport != rt->transport) {
1671 err = AVERROR_INVALIDDATA;
1672 goto fail;
1673 }
1674 } else {
1675 rt->lower_transport = reply->transports[0].lower_transport;
1676 rt->transport = reply->transports[0].transport;
1677 }
1678
1679 /* Fail if the server responded with another lower transport mode
1680 * than what we requested. */
1681 if (reply->transports[0].lower_transport != lower_transport) {
1682 av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1683 err = AVERROR_INVALIDDATA;
1684 goto fail;
1685 }
1686
1687 switch(reply->transports[0].lower_transport) {
1688 case RTSP_LOWER_TRANSPORT_TCP:
1689 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1690 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1691 break;
1692
1693 case RTSP_LOWER_TRANSPORT_UDP: {
1694 char url[MAX_URL_SIZE], options[30] = "";
1695 const char *peer = host;
1696
1697 if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC)
1698 av_strlcpy(options, "?connect=1", sizeof(options));
1699 /* Use source address if specified */
1700 if (reply->transports[0].source[0])
1701 peer = reply->transports[0].source;
1702 ff_url_join(url, sizeof(url), "rtp", NULL, peer,
1703 reply->transports[0].server_port_min, "%s", options);
1704 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1705 ff_rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1706 err = AVERROR_INVALIDDATA;
1707 goto fail;
1708 }
1709 break;
1710 }
1711 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1712 char url[MAX_URL_SIZE], namebuf[50], optbuf[20] = "";
1713 struct sockaddr_storage addr;
1714 int port, ttl;
1715 AVDictionary *opts = map_to_opts(rt);
1716
1717 if (reply->transports[0].destination.ss_family) {
1718 addr = reply->transports[0].destination;
1719 port = reply->transports[0].port_min;
1720 ttl = reply->transports[0].ttl;
1721 } else {
1722 addr = rtsp_st->sdp_ip;
1723 port = rtsp_st->sdp_port;
1724 ttl = rtsp_st->sdp_ttl;
1725 }
1726 if (ttl > 0)
1727 snprintf(optbuf, sizeof(optbuf), "?ttl=%d", ttl);
1728 getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1729 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1730 ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1731 port, "%s", optbuf);
1732 err = ffurl_open_whitelist(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
1733 &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
1734 av_dict_free(&opts);
1735
1736 if (err < 0) {
1737 err = AVERROR_INVALIDDATA;
1738 goto fail;
1739 }
1740 break;
1741 }
1742 }
1743
1744 if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
1745 goto fail;
1746 }
1747
1748 if (rt->nb_rtsp_streams && reply->timeout > 0)
1749 rt->timeout = reply->timeout;
1750
1751 if (rt->server_type == RTSP_SERVER_REAL)
1752 rt->need_subscription = 1;
1753
1754 return 0;
1755
1756 fail:
1757 ff_rtsp_undo_setup(s, 0);
1758 return err;
1759 }
1760
1761 void ff_rtsp_close_connections(AVFormatContext *s)
1762 {
1763 RTSPState *rt = s->priv_data;
1764 if (rt->rtsp_hd_out != rt->rtsp_hd)
1765 ffurl_closep(&rt->rtsp_hd_out);
1766 rt->rtsp_hd_out = NULL;
1767 ffurl_closep(&rt->rtsp_hd);
1768 }
1769
1770 int ff_rtsp_connect(AVFormatContext *s)
1771 {
1772 RTSPState *rt = s->priv_data;
1773 char proto[128], host[1024], path[2048];
1774 char tcpname[1024], cmd[MAX_URL_SIZE], auth[128];
1775 const char *lower_rtsp_proto = "tcp";
1776 int port, err, tcp_fd;
1777 RTSPMessageHeader reply1, *reply = &reply1;
1778 int lower_transport_mask = 0;
1779 int default_port = RTSP_DEFAULT_PORT;
1780 int https_tunnel = 0;
1781 char real_challenge[64] = "";
1782 struct sockaddr_storage peer;
1783 socklen_t peer_len = sizeof(peer);
1784
1785 if (rt->rtp_port_max < rt->rtp_port_min) {
1786 av_log(s, AV_LOG_ERROR, "Invalid UDP port range, max port %d less "
1787 "than min port %d\n", rt->rtp_port_max,
1788 rt->rtp_port_min);
1789 return AVERROR(EINVAL);
1790 }
1791
1792 if (!ff_network_init())
1793 return AVERROR(EIO);
1794
1795 if (s->max_delay < 0) /* Not set by the caller */
1796 s->max_delay = s->iformat ? DEFAULT_REORDERING_DELAY : 0;
1797
1798 rt->control_transport = RTSP_MODE_PLAIN;
1799 if (rt->lower_transport_mask & ((1 << RTSP_LOWER_TRANSPORT_HTTP) |
1800 (1 << RTSP_LOWER_TRANSPORT_HTTPS))) {
1801 https_tunnel = !!(rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_HTTPS));
1802 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1803 rt->control_transport = RTSP_MODE_TUNNEL;
1804 }
1805 /* Only pass through valid flags from here */
1806 rt->lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1807
1808 redirect:
1809 memset(&reply1, 0, sizeof(reply1));
1810 /* extract hostname and port */
1811 av_url_split(proto, sizeof(proto), auth, sizeof(auth),
1812 host, sizeof(host), &port, path, sizeof(path), s->url);
1813
1814 if (!strcmp(proto, "rtsps")) {
1815 lower_rtsp_proto = "tls";
1816 default_port = RTSPS_DEFAULT_PORT;
1817 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1818 } else if (!strcmp(proto, "satip")) {
1819 av_strlcpy(proto, "rtsp", sizeof(proto));
1820 rt->server_type = RTSP_SERVER_SATIP;
1821 }
1822
1823 if (*auth) {
1824 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1825 }
1826 if (port < 0)
1827 port = default_port;
1828
1829 lower_transport_mask = rt->lower_transport_mask;
1830
1831 if (!lower_transport_mask)
1832 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1833
1834 if (s->oformat) {
1835 /* Only UDP or TCP - UDP multicast isn't supported. */
1836 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1837 (1 << RTSP_LOWER_TRANSPORT_TCP);
1838 if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1839 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1840 "only UDP and TCP are supported for output.\n");
1841 err = AVERROR(EINVAL);
1842 goto fail;
1843 }
1844 }
1845
1846 /* Construct the URI used in request; this is similar to s->url,
1847 * but with authentication credentials removed and RTSP specific options
1848 * stripped out. */
1849 ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL,
1850 host, port, "%s", path);
1851
1852 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1853 /* set up initial handshake for tunneling */
1854 char httpname[1024];
1855 char sessioncookie[17];
1856 char headers[1024];
1857 AVDictionary *options = NULL;
1858
1859 av_dict_set_int(&options, "timeout", rt->stimeout, 0);
1860 if (https_tunnel) {
1861 int ret = copy_tls_opts_dict(rt, &options);
1862 if (ret < 0) {
1863 av_dict_free(&options);
1864 err = ret;
1865 goto fail;
1866 }
1867 }
1868
1869 ff_url_join(httpname, sizeof(httpname), https_tunnel ? "https" : "http", auth, host, port, "%s", path);
1870 snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1871 av_get_random_seed(), av_get_random_seed());
1872
1873 /* GET requests */
1874 if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ,
1875 &s->interrupt_callback) < 0) {
1876 av_dict_free(&options);
1877 err = AVERROR(EIO);
1878 goto fail;
1879 }
1880
1881 /* generate GET headers */
1882 snprintf(headers, sizeof(headers),
1883 "x-sessioncookie: %s\r\n"
1884 "Accept: application/x-rtsp-tunnelled\r\n"
1885 "Pragma: no-cache\r\n"
1886 "Cache-Control: no-cache\r\n",
1887 sessioncookie);
1888 av_opt_set(rt->rtsp_hd->priv_data, "headers", headers, 0);
1889
1890 if (!rt->rtsp_hd->protocol_whitelist && s->protocol_whitelist) {
1891 rt->rtsp_hd->protocol_whitelist = av_strdup(s->protocol_whitelist);
1892 if (!rt->rtsp_hd->protocol_whitelist) {
1893 av_dict_free(&options);
1894 err = AVERROR(ENOMEM);
1895 goto fail;
1896 }
1897 }
1898
1899 /* complete the connection */
1900 if (ffurl_connect(rt->rtsp_hd, &options)) {
1901 av_dict_free(&options);
1902 err = AVERROR(EIO);
1903 goto fail;
1904 }
1905
1906 /* POST requests */
1907 if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE,
1908 &s->interrupt_callback) < 0 ) {
1909 av_dict_free(&options);
1910 err = AVERROR(EIO);
1911 goto fail;
1912 }
1913
1914 /* generate POST headers */
1915 snprintf(headers, sizeof(headers),
1916 "x-sessioncookie: %s\r\n"
1917 "Content-Type: application/x-rtsp-tunnelled\r\n"
1918 "Pragma: no-cache\r\n"
1919 "Cache-Control: no-cache\r\n"
1920 "Content-Length: 32767\r\n"
1921 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1922 sessioncookie);
1923 av_opt_set(rt->rtsp_hd_out->priv_data, "headers", headers, 0);
1924 av_opt_set(rt->rtsp_hd_out->priv_data, "chunked_post", "0", 0);
1925 av_opt_set(rt->rtsp_hd_out->priv_data, "send_expect_100", "0", 0);
1926
1927 /* Initialize the authentication state for the POST session. The HTTP
1928 * protocol implementation doesn't properly handle multi-pass
1929 * authentication for POST requests, since it would require one of
1930 * the following:
1931 * - implementing Expect: 100-continue, which many HTTP servers
1932 * don't support anyway, even less the RTSP servers that do HTTP
1933 * tunneling
1934 * - sending the whole POST data until getting a 401 reply specifying
1935 * what authentication method to use, then resending all that data
1936 * - waiting for potential 401 replies directly after sending the
1937 * POST header (waiting for some unspecified time)
1938 * Therefore, we copy the full auth state, which works for both basic
1939 * and digest. (For digest, we would have to synchronize the nonce
1940 * count variable between the two sessions, if we'd do more requests
1941 * with the original session, though.)
1942 */
1943 ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1944
1945 /* complete the connection */
1946 if (ffurl_connect(rt->rtsp_hd_out, &options)) {
1947 av_dict_free(&options);
1948 err = AVERROR(EIO);
1949 goto fail;
1950 }
1951 av_dict_free(&options);
1952 } else {
1953 int ret;
1954 /* open the tcp connection */
1955 AVDictionary *proto_opts = NULL;
1956 if (strcmp("tls", lower_rtsp_proto) == 0) {
1957 ret = copy_tls_opts_dict(rt, &proto_opts);
1958 if (ret < 0) {
1959 av_dict_free(&proto_opts);
1960 err = ret;
1961 goto fail;
1962 }
1963 }
1964
1965 ff_url_join(tcpname, sizeof(tcpname), lower_rtsp_proto, NULL,
1966 host, port,
1967 "?timeout=%"PRId64, rt->stimeout);
1968 if ((ret = ffurl_open_whitelist(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
1969 &s->interrupt_callback, &proto_opts, s->protocol_whitelist, s->protocol_blacklist, NULL)) < 0) {
1970 av_dict_free(&proto_opts);
1971 err = ret;
1972 goto fail;
1973 }
1974 av_dict_free(&proto_opts);
1975 rt->rtsp_hd_out = rt->rtsp_hd;
1976 }
1977 rt->seq = 0;
1978
1979 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1980 if (tcp_fd < 0) {
1981 err = tcp_fd;
1982 goto fail;
1983 }
1984 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1985 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1986 NULL, 0, NI_NUMERICHOST);
1987 }
1988
1989 /* request options supported by the server; this also detects server
1990 * type */
1991 if (rt->server_type != RTSP_SERVER_SATIP)
1992 rt->server_type = RTSP_SERVER_RTP;
1993 for (;;) {
1994 cmd[0] = 0;
1995 if (rt->server_type == RTSP_SERVER_REAL)
1996 av_strlcat(cmd,
1997 /*
1998 * The following entries are required for proper
1999 * streaming from a Realmedia server. They are
2000 * interdependent in some way although we currently
2001 * don't quite understand how. Values were copied
2002 * from mplayer SVN r23589.
2003 * ClientChallenge is a 16-byte ID in hex
2004 * CompanyID is a 16-byte ID in base64
2005 */
2006 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
2007 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
2008 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
2009 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
2010 sizeof(cmd));
2011 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
2012 if (reply->status_code != RTSP_STATUS_OK) {
2013 err = ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
2014 goto fail;
2015 }
2016
2017 /* detect server type if not standard-compliant RTP */
2018 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
2019 rt->server_type = RTSP_SERVER_REAL;
2020 continue;
2021 } else if (!av_strncasecmp(reply->server, "WMServer/", 9)) {
2022 rt->server_type = RTSP_SERVER_WMS;
2023 } else if (rt->server_type == RTSP_SERVER_REAL)
2024 strcpy(real_challenge, reply->real_challenge);
2025 break;
2026 }
2027
2028 #if CONFIG_RTSP_DEMUXER
2029 if (s->iformat) {
2030 if (rt->server_type == RTSP_SERVER_SATIP)
2031 err = init_satip_stream(s);
2032 else
2033 err = ff_rtsp_setup_input_streams(s, reply);
2034 } else
2035 #endif
2036 if (CONFIG_RTSP_MUXER)
2037 err = ff_rtsp_setup_output_streams(s, host);
2038 else
2039 av_unreachable("Either muxer or demuxer must be enabled");
2040 if (err)
2041 goto fail;
2042
2043 do {
2044 int lower_transport = ff_log2_tab[lower_transport_mask &
2045 ~(lower_transport_mask - 1)];
2046
2047 if ((lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_TCP))
2048 && (rt->rtsp_flags & RTSP_FLAG_PREFER_TCP))
2049 lower_transport = RTSP_LOWER_TRANSPORT_TCP;
2050
2051 err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
2052 rt->server_type == RTSP_SERVER_REAL ?
2053 real_challenge : NULL);
2054 if (err < 0)
2055 goto fail;
2056 lower_transport_mask &= ~(1 << lower_transport);
2057 if (lower_transport_mask == 0 && err == 1) {
2058 err = AVERROR(EPROTONOSUPPORT);
2059 goto fail;
2060 }
2061 } while (err);
2062
2063 rt->lower_transport_mask = lower_transport_mask;
2064 av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
2065 rt->state = RTSP_STATE_IDLE;
2066 rt->seek_timestamp = 0; /* default is to start stream at position zero */
2067 return 0;
2068 fail:
2069 ff_rtsp_close_streams(s);
2070 ff_rtsp_close_connections(s);
2071 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
2072 char *new_url = av_strdup(reply->location);
2073 if (!new_url) {
2074 err = AVERROR(ENOMEM);
2075 goto fail2;
2076 }
2077 ff_format_set_url(s, new_url);
2078 rt->session_id[0] = '\0';
2079 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
2080 reply->status_code,
2081 s->url);
2082 goto redirect;
2083 }
2084 fail2:
2085 ff_network_close();
2086 return err;
2087 }
2088 #endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
2089
2090 #if CONFIG_RTPDEC
2091 #if CONFIG_RTSP_DEMUXER
2092 static int parse_rtsp_message(AVFormatContext *s)
2093 {
2094 RTSPState *rt = s->priv_data;
2095 int ret;
2096
2097 if (rt->rtsp_flags & RTSP_FLAG_LISTEN) {
2098 if (rt->state == RTSP_STATE_STREAMING) {
2099 return ff_rtsp_parse_streaming_commands(s);
2100 } else
2101 return AVERROR_EOF;
2102 } else {
2103 RTSPMessageHeader reply;
2104 ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
2105 if (ret < 0)
2106 return ret;
2107 /* XXX: parse message */
2108 if (rt->state != RTSP_STATE_STREAMING)
2109 return 0;
2110 }
2111
2112 return 0;
2113 }
2114 #endif
2115
2116 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
2117 uint8_t *buf, int buf_size, int64_t wait_end)
2118 {
2119 RTSPState *rt = s->priv_data;
2120 RTSPStream *rtsp_st;
2121 int n, i, ret;
2122 struct pollfd *p = rt->p;
2123 int *fds = NULL, fdsnum, fdsidx;
2124 int64_t runs = rt->stimeout / POLLING_TIME / 1000;
2125
2126 if (!p) {
2127 p = rt->p = av_malloc_array(2 * rt->nb_rtsp_streams + 1, sizeof(*p));
2128 if (!p)
2129 return AVERROR(ENOMEM);
2130
2131 if (rt->rtsp_hd) {
2132 p[rt->max_p].fd = ffurl_get_file_handle(rt->rtsp_hd);
2133 p[rt->max_p++].events = POLLIN;
2134 }
2135 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2136 rtsp_st = rt->rtsp_streams[i];
2137 if (rtsp_st->rtp_handle) {
2138 if (ret = ffurl_get_multi_file_handle(rtsp_st->rtp_handle,
2139 &fds, &fdsnum)) {
2140 av_log(s, AV_LOG_ERROR, "Unable to recover rtp ports\n");
2141 return ret;
2142 }
2143 if (fdsnum != 2) {
2144 av_log(s, AV_LOG_ERROR,
2145 "Number of fds %d not supported\n", fdsnum);
2146 av_freep(&fds);
2147 return AVERROR_INVALIDDATA;
2148 }
2149 for (fdsidx = 0; fdsidx < fdsnum; fdsidx++) {
2150 p[rt->max_p].fd = fds[fdsidx];
2151 p[rt->max_p++].events = POLLIN;
2152 }
2153 av_freep(&fds);
2154 }
2155 }
2156 }
2157
2158 for (;;) {
2159 if (ff_check_interrupt(&s->interrupt_callback))
2160 return AVERROR_EXIT;
2161 if (wait_end && wait_end - av_gettime_relative() < 0)
2162 return AVERROR(EAGAIN);
2163 n = poll(p, rt->max_p, POLLING_TIME);
2164 if (n > 0) {
2165 int j = rt->rtsp_hd ? 1 : 0;
2166 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2167 rtsp_st = rt->rtsp_streams[i];
2168 if (rtsp_st->rtp_handle) {
2169 if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
2170 ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size);
2171 if (ret > 0) {
2172 *prtsp_st = rtsp_st;
2173 return ret;
2174 }
2175 }
2176 j+=2;
2177 }
2178 }
2179 #if CONFIG_RTSP_DEMUXER
2180 if (rt->rtsp_hd && p[0].revents & POLLIN) {
2181 if ((ret = parse_rtsp_message(s)) < 0) {
2182 return ret;
2183 }
2184 }
2185 #endif
2186 } else if (n == 0 && rt->stimeout > 0 && --runs <= 0) {
2187 return AVERROR(ETIMEDOUT);
2188 } else if (n < 0 && errno != EINTR)
2189 return AVERROR(errno);
2190 }
2191 }
2192
2193 static int pick_stream(AVFormatContext *s, RTSPStream **rtsp_st,
2194 const uint8_t *buf, int len)
2195 {
2196 RTSPState *rt = s->priv_data;
2197 int i;
2198 if (len < 0)
2199 return len;
2200 if (rt->nb_rtsp_streams == 1) {
2201 *rtsp_st = rt->rtsp_streams[0];
2202 return len;
2203 }
2204 if (len >= 8 && rt->transport == RTSP_TRANSPORT_RTP) {
2205 if (RTP_PT_IS_RTCP(rt->recvbuf[1])) {
2206 int no_ssrc = 0;
2207 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2208 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
2209 if (!rtpctx)
2210 continue;
2211 if (rtpctx->ssrc == AV_RB32(&buf[4])) {
2212 *rtsp_st = rt->rtsp_streams[i];
2213 return len;
2214 }
2215 if (!rtpctx->ssrc)
2216 no_ssrc = 1;
2217 }
2218 if (no_ssrc) {
2219 av_log(s, AV_LOG_WARNING,
2220 "Unable to pick stream for packet - SSRC not known for "
2221 "all streams\n");
2222 return AVERROR(EAGAIN);
2223 }
2224 } else {
2225 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2226 if ((buf[1] & 0x7f) == rt->rtsp_streams[i]->sdp_payload_type) {
2227 *rtsp_st = rt->rtsp_streams[i];
2228 return len;
2229 }
2230 }
2231 }
2232 }
2233 av_log(s, AV_LOG_WARNING, "Unable to pick stream for packet\n");
2234 return AVERROR(EAGAIN);
2235 }
2236
2237 static int read_packet(AVFormatContext *s,
2238 RTSPStream **rtsp_st, RTSPStream *first_queue_st,
2239 int64_t wait_end)
2240 {
2241 RTSPState *rt = s->priv_data;
2242 int len;
2243
2244 switch(rt->lower_transport) {
2245 default:
2246 #if CONFIG_RTSP_DEMUXER
2247 case RTSP_LOWER_TRANSPORT_TCP:
2248 len = ff_rtsp_tcp_read_packet(s, rtsp_st, rt->recvbuf, RECVBUF_SIZE);
2249 break;
2250 #endif
2251 case RTSP_LOWER_TRANSPORT_UDP:
2252 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
2253 len = udp_read_packet(s, rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
2254 if (len > 0 && (*rtsp_st)->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
2255 ff_rtp_check_and_send_back_rr((*rtsp_st)->transport_priv, (*rtsp_st)->rtp_handle, NULL, len);
2256 break;
2257 case RTSP_LOWER_TRANSPORT_CUSTOM:
2258 if (first_queue_st && rt->transport == RTSP_TRANSPORT_RTP &&
2259 wait_end && wait_end < av_gettime_relative())
2260 len = AVERROR(EAGAIN);
2261 else
2262 len = avio_read_partial(s->pb, rt->recvbuf, RECVBUF_SIZE);
2263 len = pick_stream(s, rtsp_st, rt->recvbuf, len);
2264 if (len > 0 && (*rtsp_st)->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
2265 ff_rtp_check_and_send_back_rr((*rtsp_st)->transport_priv, NULL, s->pb, len);
2266 break;
2267 }
2268
2269 if (len == 0)
2270 return AVERROR_EOF;
2271
2272 return len;
2273 }
2274
2275 int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
2276 {
2277 RTSPState *rt = s->priv_data;
2278 int ret, len;
2279 RTSPStream *rtsp_st, *first_queue_st = NULL;
2280 int64_t wait_end = 0;
2281
2282 if (rt->nb_byes == rt->nb_rtsp_streams)
2283 return AVERROR_EOF;
2284
2285 /* get next frames from the same RTP packet */
2286 if (rt->cur_transport_priv) {
2287 if (rt->transport == RTSP_TRANSPORT_RDT) {
2288 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
2289 } else if (rt->transport == RTSP_TRANSPORT_RTP) {
2290 ret = ff_rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
2291 } else if (CONFIG_RTPDEC && rt->ts) {
2292 ret = avpriv_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf + rt->recvbuf_pos, rt->recvbuf_len - rt->recvbuf_pos);
2293 if (ret >= 0) {
2294 rt->recvbuf_pos += ret;
2295 ret = rt->recvbuf_pos < rt->recvbuf_len;
2296 }
2297 } else
2298 ret = -1;
2299 if (ret == 0) {
2300 rt->cur_transport_priv = NULL;
2301 return 0;
2302 } else if (ret == 1) {
2303 return 0;
2304 } else
2305 rt->cur_transport_priv = NULL;
2306 }
2307
2308 redo:
2309 if (rt->transport == RTSP_TRANSPORT_RTP) {
2310 int i;
2311 int64_t first_queue_time = 0;
2312 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2313 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
2314 int64_t queue_time;
2315 if (!rtpctx)
2316 continue;
2317 queue_time = ff_rtp_queued_packet_time(rtpctx);
2318 if (queue_time && (queue_time - first_queue_time < 0 ||
2319 !first_queue_time)) {
2320 first_queue_time = queue_time;
2321 first_queue_st = rt->rtsp_streams[i];
2322 }
2323 }
2324 if (first_queue_time) {
2325 wait_end = first_queue_time + s->max_delay;
2326 } else {
2327 wait_end = 0;
2328 first_queue_st = NULL;
2329 }
2330 }
2331
2332 /* read next RTP packet */
2333 if (!rt->recvbuf) {
2334 rt->recvbuf = av_malloc(RECVBUF_SIZE);
2335 if (!rt->recvbuf)
2336 return AVERROR(ENOMEM);
2337 }
2338
2339 len = read_packet(s, &rtsp_st, first_queue_st, wait_end);
2340 if (len == AVERROR(EAGAIN) && first_queue_st &&
2341 rt->transport == RTSP_TRANSPORT_RTP) {
2342 av_log(s, AV_LOG_WARNING,
2343 "max delay reached. need to consume packet\n");
2344 rtsp_st = first_queue_st;
2345 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
2346 goto end;
2347 }
2348 if (len < 0)
2349 return len;
2350
2351 if (rt->transport == RTSP_TRANSPORT_RDT) {
2352 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2353 } else if (rt->transport == RTSP_TRANSPORT_RTP) {
2354 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2355 if (rtsp_st->feedback) {
2356 AVIOContext *pb = NULL;
2357 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_CUSTOM)
2358 pb = s->pb;
2359 ff_rtp_send_rtcp_feedback(rtsp_st->transport_priv, rtsp_st->rtp_handle, pb);
2360 }
2361 if (ret < 0) {
2362 /* Either bad packet, or a RTCP packet. Check if the
2363 * first_rtcp_ntp_time field was initialized. */
2364 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
2365 if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
2366 /* first_rtcp_ntp_time has been initialized for this stream,
2367 * copy the same value to all other uninitialized streams,
2368 * in order to map their timestamp origin to the same ntp time
2369 * as this one. */
2370 int i;
2371 AVStream *st = NULL;
2372 if (rtsp_st->stream_index >= 0)
2373 st = s->streams[rtsp_st->stream_index];
2374 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2375 RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
2376 AVStream *st2 = NULL;
2377 if (rt->rtsp_streams[i]->stream_index >= 0)
2378 st2 = s->streams[rt->rtsp_streams[i]->stream_index];
2379 if (rtpctx2 && st && st2 &&
2380 rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
2381 rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
2382 rtpctx2->rtcp_ts_offset = av_rescale_q(
2383 rtpctx->rtcp_ts_offset, st->time_base,
2384 st2->time_base);
2385 }
2386 }
2387 // Make real NTP start time available in AVFormatContext
2388 if (s->start_time_realtime == AV_NOPTS_VALUE) {
2389 s->start_time_realtime = ff_parse_ntp_time(rtpctx->first_rtcp_ntp_time) - NTP_OFFSET_US;
2390 if (rtpctx->st) {
2391 s->start_time_realtime -=
2392 av_rescale_q (rtpctx->rtcp_ts_offset, rtpctx->st->time_base, AV_TIME_BASE_Q);
2393 }
2394 }
2395 }
2396 if (ret == -RTCP_BYE) {
2397 rt->nb_byes++;
2398
2399 av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
2400 rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
2401
2402 if (rt->nb_byes == rt->nb_rtsp_streams)
2403 return AVERROR_EOF;
2404 }
2405 }
2406 } else if (CONFIG_RTPDEC && rt->ts) {
2407 ret = avpriv_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf, len);
2408 if (ret >= 0) {
2409 if (ret < len) {
2410 rt->recvbuf_len = len;
2411 rt->recvbuf_pos = ret;
2412 rt->cur_transport_priv = rt->ts;
2413 return 1;
2414 } else {
2415 ret = 0;
2416 }
2417 }
2418 } else {
2419 return AVERROR_INVALIDDATA;
2420 }
2421 end:
2422 if (ret < 0)
2423 goto redo;
2424 if (ret == 1)
2425 /* more packets may follow, so we save the RTP context */
2426 rt->cur_transport_priv = rtsp_st->transport_priv;
2427
2428 return ret;
2429 }
2430 #endif /* CONFIG_RTPDEC */
2431
2432 #if CONFIG_SDP_DEMUXER
2433 static int sdp_probe(const AVProbeData *p1)
2434 {
2435 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
2436
2437 /* we look for a line beginning "c=IN IP" */
2438 while (p < p_end && *p != '\0') {
2439 if (sizeof("c=IN IP") - 1 < p_end - p &&
2440 av_strstart(p, "c=IN IP", NULL))
2441 return AVPROBE_SCORE_EXTENSION;
2442
2443 while (p < p_end - 1 && *p != '\n') p++;
2444 if (++p >= p_end)
2445 break;
2446 if (*p == '\r')
2447 p++;
2448 }
2449 return 0;
2450 }
2451
2452 static void append_source_addrs(char *buf, int size, const char *name,
2453 int count, struct RTSPSource **addrs)
2454 {
2455 int i;
2456 if (!count)
2457 return;
2458 av_strlcatf(buf, size, "&%s=%s", name, addrs[0]->addr);
2459 for (i = 1; i < count; i++)
2460 av_strlcatf(buf, size, ",%s", addrs[i]->addr);
2461 }
2462
2463 static int sdp_read_header(AVFormatContext *s)
2464 {
2465 RTSPState *rt = s->priv_data;
2466 RTSPStream *rtsp_st;
2467 int i, err;
2468 char url[MAX_URL_SIZE];
2469 AVBPrint bp;
2470
2471 if (!ff_network_init())
2472 return AVERROR(EIO);
2473
2474 if (s->max_delay < 0) /* Not set by the caller */
2475 s->max_delay = DEFAULT_REORDERING_DELAY;
2476 if (rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)
2477 rt->lower_transport = RTSP_LOWER_TRANSPORT_CUSTOM;
2478
2479 /* read the whole sdp file */
2480 av_bprint_init(&bp, 0, AV_BPRINT_SIZE_UNLIMITED);
2481 err = avio_read_to_bprint(s->pb, &bp, INT_MAX);
2482 if (err < 0 ) {
2483 ff_network_close();
2484 av_bprint_finalize(&bp, NULL);
2485 return err;
2486 }
2487 err = ff_sdp_parse(s, bp.str);
2488 av_bprint_finalize(&bp, NULL);
2489 if (err) goto fail;
2490
2491 /* open each RTP stream */
2492 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2493 char namebuf[50];
2494 rtsp_st = rt->rtsp_streams[i];
2495
2496 if (!(rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)) {
2497 AVDictionary *opts = map_to_opts(rt);
2498 char buf[MAX_URL_SIZE];
2499 const char *p;
2500
2501 err = getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip,
2502 sizeof(rtsp_st->sdp_ip),
2503 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
2504 if (err) {
2505 av_log(s, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(err));
2506 err = AVERROR(EIO);
2507 av_dict_free(&opts);
2508 goto fail;
2509 }
2510 ff_url_join(url, sizeof(url), "rtp", NULL,
2511 namebuf, rtsp_st->sdp_port,
2512 "?localport=%d&ttl=%d&connect=%d&write_to_source=%d",
2513 rtsp_st->sdp_port, rtsp_st->sdp_ttl,
2514 rt->rtsp_flags & RTSP_FLAG_FILTER_SRC ? 1 : 0,
2515 rt->rtsp_flags & RTSP_FLAG_RTCP_TO_SOURCE ? 1 : 0);
2516
2517 p = strchr(s->url, '?');
2518 if (p && av_find_info_tag(buf, sizeof(buf), "localaddr", p))
2519 av_strlcatf(url, sizeof(url), "&localaddr=%s", buf);
2520 else if (rt->localaddr && rt->localaddr[0])
2521 av_strlcatf(url, sizeof(url), "&localaddr=%s", rt->localaddr);
2522 append_source_addrs(url, sizeof(url), "sources",
2523 rtsp_st->nb_include_source_addrs,
2524 rtsp_st->include_source_addrs);
2525 append_source_addrs(url, sizeof(url), "block",
2526 rtsp_st->nb_exclude_source_addrs,
2527 rtsp_st->exclude_source_addrs);
2528 err = ffurl_open_whitelist(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ,
2529 &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
2530
2531 av_dict_free(&opts);
2532
2533 if (err < 0) {
2534 err = AVERROR_INVALIDDATA;
2535 goto fail;
2536 }
2537 }
2538 if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
2539 goto fail;
2540 }
2541 return 0;
2542 fail:
2543 ff_rtsp_close_streams(s);
2544 ff_network_close();
2545 return err;
2546 }
2547
2548 static int sdp_read_close(AVFormatContext *s)
2549 {
2550 ff_rtsp_close_streams(s);
2551 ff_network_close();
2552 return 0;
2553 }
2554
2555 static const AVClass sdp_demuxer_class = {
2556 .class_name = "SDP demuxer",
2557 .item_name = av_default_item_name,
2558 .option = sdp_options,
2559 .version = LIBAVUTIL_VERSION_INT,
2560 };
2561
2562 const FFInputFormat ff_sdp_demuxer = {
2563 .p.name = "sdp",
2564 .p.long_name = NULL_IF_CONFIG_SMALL("SDP"),
2565 .p.priv_class = &sdp_demuxer_class,
2566 .priv_data_size = sizeof(RTSPState),
2567 .read_probe = sdp_probe,
2568 .read_header = sdp_read_header,
2569 .read_packet = ff_rtsp_fetch_packet,
2570 .read_close = sdp_read_close,
2571 };
2572 #endif /* CONFIG_SDP_DEMUXER */
2573
2574 #if CONFIG_RTP_DEMUXER
2575 static int rtp_probe(const AVProbeData *p)
2576 {
2577 if (av_strstart(p->filename, "rtp:", NULL))
2578 return AVPROBE_SCORE_MAX;
2579 return 0;
2580 }
2581
2582 static int rtp_read_header(AVFormatContext *s)
2583 {
2584 uint8_t recvbuf[RTP_MAX_PACKET_LENGTH];
2585 char host[500], filters_buf[1000];
2586 int ret, port;
2587 URLContext* in = NULL;
2588 int payload_type;
2589 AVCodecParameters *par = NULL;
2590 struct sockaddr_storage addr;
2591 FFIOContext pb;
2592 socklen_t addrlen = sizeof(addr);
2593 RTSPState *rt = s->priv_data;
2594 const char *p;
2595 AVBPrint sdp;
2596 AVDictionary *opts = NULL;
2597
2598 if (!ff_network_init())
2599 return AVERROR(EIO);
2600
2601 opts = map_to_opts(rt);
2602 ret = ffurl_open_whitelist(&in, s->url, AVIO_FLAG_READ,
2603 &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
2604 av_dict_free(&opts);
2605 if (ret)
2606 goto fail;
2607
2608 while (1) {
2609 ret = ffurl_read(in, recvbuf, sizeof(recvbuf));
2610 if (ret == AVERROR(EAGAIN))
2611 continue;
2612 if (ret < 0)
2613 goto fail;
2614 if (ret < 12) {
2615 av_log(s, AV_LOG_WARNING, "Received too short packet\n");
2616 continue;
2617 }
2618
2619 if ((recvbuf[0] & 0xc0) != 0x80) {
2620 av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
2621 "received\n");
2622 continue;
2623 }
2624
2625 if (RTP_PT_IS_RTCP(recvbuf[1]))
2626 continue;
2627
2628 payload_type = recvbuf[1] & 0x7f;
2629 break;
2630 }
2631 getsockname(ffurl_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
2632 ffurl_closep(&in);
2633
2634 par = avcodec_parameters_alloc();
2635 if (!par) {
2636 ret = AVERROR(ENOMEM);
2637 goto fail;
2638 }
2639
2640 if (ff_rtp_get_codec_info(par, payload_type)) {
2641 av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
2642 "without an SDP file describing it\n",
2643 payload_type);
2644 ret = AVERROR_INVALIDDATA;
2645 goto fail;
2646 }
2647 if (par->codec_type != AVMEDIA_TYPE_DATA) {
2648 av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
2649 "properly you need an SDP file "
2650 "describing it\n");
2651 }
2652
2653 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
2654 NULL, 0, s->url);
2655
2656 av_bprint_init(&sdp, 0, AV_BPRINT_SIZE_UNLIMITED);
2657 av_bprintf(&sdp, "v=0\r\nc=IN IP%d %s\r\n",
2658 addr.ss_family == AF_INET ? 4 : 6, host);
2659
2660 p = strchr(s->url, '?');
2661 if (p) {
2662 static const char filters[][2][8] = { { "sources", "incl" },
2663 { "block", "excl" } };
2664 int i;
2665 char *q;
2666 for (i = 0; i < FF_ARRAY_ELEMS(filters); i++) {
2667 if (av_find_info_tag(filters_buf, sizeof(filters_buf), filters[i][0], p)) {
2668 q = filters_buf;
2669 while ((q = strchr(q, ',')) != NULL)
2670 *q = ' ';
2671 av_bprintf(&sdp, "a=source-filter:%s IN IP%d %s %s\r\n",
2672 filters[i][1],
2673 addr.ss_family == AF_INET ? 4 : 6, host,
2674 filters_buf);
2675 }
2676 }
2677 }
2678
2679 av_bprintf(&sdp, "m=%s %d RTP/AVP %d\r\n",
2680 par->codec_type == AVMEDIA_TYPE_DATA ? "application" :
2681 par->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
2682 port, payload_type);
2683 av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp.str);
2684 if (!av_bprint_is_complete(&sdp))
2685 goto fail_nobuf;
2686 avcodec_parameters_free(&par);
2687
2688 ffio_init_read_context(&pb, sdp.str, sdp.len);
2689 s->pb = &pb.pub;
2690
2691 /* if sdp_read_header() fails then following ff_network_close() cancels out */
2692 /* ff_network_init() at the start of this function. Otherwise it cancels out */
2693 /* ff_network_init() inside sdp_read_header() */
2694 ff_network_close();
2695
2696 rt->media_type_mask = (1 << (AVMEDIA_TYPE_SUBTITLE+1)) - 1;
2697
2698 ret = sdp_read_header(s);
2699 s->pb = NULL;
2700 av_bprint_finalize(&sdp, NULL);
2701 return ret;
2702
2703 fail_nobuf:
2704 ret = AVERROR(ENOMEM);
2705 av_log(s, AV_LOG_ERROR, "rtp_read_header(): not enough buffer space for sdp-headers\n");
2706 av_bprint_finalize(&sdp, NULL);
2707 fail:
2708 avcodec_parameters_free(&par);
2709 ffurl_closep(&in);
2710 ff_network_close();
2711 return ret;
2712 }
2713
2714 static const AVClass rtp_demuxer_class = {
2715 .class_name = "RTP demuxer",
2716 .item_name = av_default_item_name,
2717 .option = rtp_options,
2718 .version = LIBAVUTIL_VERSION_INT,
2719 };
2720
2721 const FFInputFormat ff_rtp_demuxer = {
2722 .p.name = "rtp",
2723 .p.long_name = NULL_IF_CONFIG_SMALL("RTP input"),
2724 .p.flags = AVFMT_NOFILE,
2725 .p.priv_class = &rtp_demuxer_class,
2726 .priv_data_size = sizeof(RTSPState),
2727 .read_probe = rtp_probe,
2728 .read_header = rtp_read_header,
2729 .read_packet = ff_rtsp_fetch_packet,
2730 .read_close = sdp_read_close,
2731 };
2732 #endif /* CONFIG_RTP_DEMUXER */
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