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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
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 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
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 * 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
 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
21

    
22
#include "libavutil/base64.h"
23
#include "libavutil/avstring.h"
24
#include "libavutil/intreadwrite.h"
25
#include "libavutil/random_seed.h"
26
#include "avformat.h"
27

    
28
#include <sys/time.h>
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#if HAVE_POLL_H
30
#include <poll.h>
31
#endif
32
#include <strings.h>
33
#include "internal.h"
34
#include "network.h"
35
#include "os_support.h"
36
#include "http.h"
37
#include "rtsp.h"
38

    
39
#include "rtpdec.h"
40
#include "rdt.h"
41
#include "rtpdec_formats.h"
42
#include "rtpenc_chain.h"
43

    
44
//#define DEBUG
45
//#define DEBUG_RTP_TCP
46

    
47
/* Timeout values for socket poll, in ms,
48
 * and read_packet(), in seconds  */
49
#define POLL_TIMEOUT_MS 100
50
#define READ_PACKET_TIMEOUT_S 10
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#define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / POLL_TIMEOUT_MS
52
#define SDP_MAX_SIZE 16384
53
#define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
54

    
55
static void get_word_until_chars(char *buf, int buf_size,
56
                                 const char *sep, const char **pp)
57
{
58
    const char *p;
59
    char *q;
60

    
61
    p = *pp;
62
    p += strspn(p, SPACE_CHARS);
63
    q = buf;
64
    while (!strchr(sep, *p) && *p != '\0') {
65
        if ((q - buf) < buf_size - 1)
66
            *q++ = *p;
67
        p++;
68
    }
69
    if (buf_size > 0)
70
        *q = '\0';
71
    *pp = p;
72
}
73

    
74
static void get_word_sep(char *buf, int buf_size, const char *sep,
75
                         const char **pp)
76
{
77
    if (**pp == '/') (*pp)++;
78
    get_word_until_chars(buf, buf_size, sep, pp);
79
}
80

    
81
static void get_word(char *buf, int buf_size, const char **pp)
82
{
83
    get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
84
}
85

    
86
/** Parse a string p in the form of Range:npt=xx-xx, and determine the start
87
 *  and end time.
88
 *  Used for seeking in the rtp stream.
89
 */
90
static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
91
{
92
    char buf[256];
93

    
94
    p += strspn(p, SPACE_CHARS);
95
    if (!av_stristart(p, "npt=", &p))
96
        return;
97

    
98
    *start = AV_NOPTS_VALUE;
99
    *end = AV_NOPTS_VALUE;
100

    
101
    get_word_sep(buf, sizeof(buf), "-", &p);
102
    *start = parse_date(buf, 1);
103
    if (*p == '-') {
104
        p++;
105
        get_word_sep(buf, sizeof(buf), "-", &p);
106
        *end = parse_date(buf, 1);
107
    }
108
//    av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
109
//    av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
110
}
111

    
112
static int get_sockaddr(const char *buf, struct sockaddr_storage *sock)
113
{
114
    struct addrinfo hints, *ai = NULL;
115
    memset(&hints, 0, sizeof(hints));
116
    hints.ai_flags = AI_NUMERICHOST;
117
    if (getaddrinfo(buf, NULL, &hints, &ai))
118
        return -1;
119
    memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
120
    freeaddrinfo(ai);
121
    return 0;
122
}
123

    
124
#if CONFIG_RTPDEC
125
static void init_rtp_handler(RTPDynamicProtocolHandler *handler,
126
                             RTSPStream *rtsp_st, AVCodecContext *codec)
127
{
128
    if (!handler)
129
        return;
130
    codec->codec_id          = handler->codec_id;
131
    rtsp_st->dynamic_handler = handler;
132
    if (handler->open)
133
        rtsp_st->dynamic_protocol_context = handler->open();
134
}
135

    
136
/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
137
static int sdp_parse_rtpmap(AVFormatContext *s,
138
                            AVStream *st, RTSPStream *rtsp_st,
139
                            int payload_type, const char *p)
140
{
141
    AVCodecContext *codec = st->codec;
142
    char buf[256];
143
    int i;
144
    AVCodec *c;
145
    const char *c_name;
146

    
147
    /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
148
     * see if we can handle this kind of payload.
149
     * The space should normally not be there but some Real streams or
150
     * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
151
     * have a trailing space. */
152
    get_word_sep(buf, sizeof(buf), "/ ", &p);
153
    if (payload_type >= RTP_PT_PRIVATE) {
154
        RTPDynamicProtocolHandler *handler =
155
            ff_rtp_handler_find_by_name(buf, codec->codec_type);
156
        init_rtp_handler(handler, rtsp_st, codec);
157
        /* If no dynamic handler was found, check with the list of standard
158
         * allocated types, if such a stream for some reason happens to
159
         * use a private payload type. This isn't handled in rtpdec.c, since
160
         * the format name from the rtpmap line never is passed into rtpdec. */
161
        if (!rtsp_st->dynamic_handler)
162
            codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
163
    } else {
164
        /* We are in a standard case
165
         * (from http://www.iana.org/assignments/rtp-parameters). */
166
        /* search into AVRtpPayloadTypes[] */
167
        codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
168
    }
169

    
170
    c = avcodec_find_decoder(codec->codec_id);
171
    if (c && c->name)
172
        c_name = c->name;
173
    else
174
        c_name = "(null)";
175

    
176
    get_word_sep(buf, sizeof(buf), "/", &p);
177
    i = atoi(buf);
178
    switch (codec->codec_type) {
179
    case AVMEDIA_TYPE_AUDIO:
180
        av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
181
        codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
182
        codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
183
        if (i > 0) {
184
            codec->sample_rate = i;
185
            av_set_pts_info(st, 32, 1, codec->sample_rate);
186
            get_word_sep(buf, sizeof(buf), "/", &p);
187
            i = atoi(buf);
188
            if (i > 0)
189
                codec->channels = i;
190
            // TODO: there is a bug here; if it is a mono stream, and
191
            // less than 22000Hz, faad upconverts to stereo and twice
192
            // the frequency.  No problem, but the sample rate is being
193
            // set here by the sdp line. Patch on its way. (rdm)
194
        }
195
        av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
196
               codec->sample_rate);
197
        av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
198
               codec->channels);
199
        break;
200
    case AVMEDIA_TYPE_VIDEO:
201
        av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
202
        if (i > 0)
203
            av_set_pts_info(st, 32, 1, i);
204
        break;
205
    default:
206
        break;
207
    }
208
    return 0;
209
}
210

    
211
/* parse the attribute line from the fmtp a line of an sdp response. This
212
 * is broken out as a function because it is used in rtp_h264.c, which is
213
 * forthcoming. */
214
int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
215
                                char *value, int value_size)
216
{
217
    *p += strspn(*p, SPACE_CHARS);
218
    if (**p) {
219
        get_word_sep(attr, attr_size, "=", p);
220
        if (**p == '=')
221
            (*p)++;
222
        get_word_sep(value, value_size, ";", p);
223
        if (**p == ';')
224
            (*p)++;
225
        return 1;
226
    }
227
    return 0;
228
}
229

    
230
typedef struct SDPParseState {
231
    /* SDP only */
232
    struct sockaddr_storage default_ip;
233
    int            default_ttl;
234
    int            skip_media;  ///< set if an unknown m= line occurs
235
} SDPParseState;
236

    
237
static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
238
                           int letter, const char *buf)
239
{
240
    RTSPState *rt = s->priv_data;
241
    char buf1[64], st_type[64];
242
    const char *p;
243
    enum AVMediaType codec_type;
244
    int payload_type, i;
245
    AVStream *st;
246
    RTSPStream *rtsp_st;
247
    struct sockaddr_storage sdp_ip;
248
    int ttl;
249

    
250
    av_dlog(s, "sdp: %c='%s'\n", letter, buf);
251

    
252
    p = buf;
253
    if (s1->skip_media && letter != 'm')
254
        return;
255
    switch (letter) {
256
    case 'c':
257
        get_word(buf1, sizeof(buf1), &p);
258
        if (strcmp(buf1, "IN") != 0)
259
            return;
260
        get_word(buf1, sizeof(buf1), &p);
261
        if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
262
            return;
263
        get_word_sep(buf1, sizeof(buf1), "/", &p);
264
        if (get_sockaddr(buf1, &sdp_ip))
265
            return;
266
        ttl = 16;
267
        if (*p == '/') {
268
            p++;
269
            get_word_sep(buf1, sizeof(buf1), "/", &p);
270
            ttl = atoi(buf1);
271
        }
272
        if (s->nb_streams == 0) {
273
            s1->default_ip = sdp_ip;
274
            s1->default_ttl = ttl;
275
        } else {
276
            st = s->streams[s->nb_streams - 1];
277
            rtsp_st = st->priv_data;
278
            rtsp_st->sdp_ip = sdp_ip;
279
            rtsp_st->sdp_ttl = ttl;
280
        }
281
        break;
282
    case 's':
283
        av_metadata_set2(&s->metadata, "title", p, 0);
284
        break;
285
    case 'i':
286
        if (s->nb_streams == 0) {
287
            av_metadata_set2(&s->metadata, "comment", p, 0);
288
            break;
289
        }
290
        break;
291
    case 'm':
292
        /* new stream */
293
        s1->skip_media = 0;
294
        get_word(st_type, sizeof(st_type), &p);
295
        if (!strcmp(st_type, "audio")) {
296
            codec_type = AVMEDIA_TYPE_AUDIO;
297
        } else if (!strcmp(st_type, "video")) {
298
            codec_type = AVMEDIA_TYPE_VIDEO;
299
        } else if (!strcmp(st_type, "application")) {
300
            codec_type = AVMEDIA_TYPE_DATA;
301
        } else {
302
            s1->skip_media = 1;
303
            return;
304
        }
305
        rtsp_st = av_mallocz(sizeof(RTSPStream));
306
        if (!rtsp_st)
307
            return;
308
        rtsp_st->stream_index = -1;
309
        dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
310

    
311
        rtsp_st->sdp_ip = s1->default_ip;
312
        rtsp_st->sdp_ttl = s1->default_ttl;
313

    
314
        get_word(buf1, sizeof(buf1), &p); /* port */
315
        rtsp_st->sdp_port = atoi(buf1);
316

    
317
        get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
318

    
319
        /* XXX: handle list of formats */
320
        get_word(buf1, sizeof(buf1), &p); /* format list */
321
        rtsp_st->sdp_payload_type = atoi(buf1);
322

    
323
        if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
324
            /* no corresponding stream */
325
        } else {
326
            st = av_new_stream(s, 0);
327
            if (!st)
328
                return;
329
            st->priv_data = rtsp_st;
330
            rtsp_st->stream_index = st->index;
331
            st->codec->codec_type = codec_type;
332
            if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
333
                RTPDynamicProtocolHandler *handler;
334
                /* if standard payload type, we can find the codec right now */
335
                ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
336
                if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
337
                    st->codec->sample_rate > 0)
338
                    av_set_pts_info(st, 32, 1, st->codec->sample_rate);
339
                /* Even static payload types may need a custom depacketizer */
340
                handler = ff_rtp_handler_find_by_id(
341
                              rtsp_st->sdp_payload_type, st->codec->codec_type);
342
                init_rtp_handler(handler, rtsp_st, st->codec);
343
            }
344
        }
345
        /* put a default control url */
346
        av_strlcpy(rtsp_st->control_url, rt->control_uri,
347
                   sizeof(rtsp_st->control_url));
348
        break;
349
    case 'a':
350
        if (av_strstart(p, "control:", &p)) {
351
            if (s->nb_streams == 0) {
352
                if (!strncmp(p, "rtsp://", 7))
353
                    av_strlcpy(rt->control_uri, p,
354
                               sizeof(rt->control_uri));
355
            } else {
356
                char proto[32];
357
                /* get the control url */
358
                st = s->streams[s->nb_streams - 1];
359
                rtsp_st = st->priv_data;
360

    
361
                /* XXX: may need to add full url resolution */
362
                av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
363
                             NULL, NULL, 0, p);
364
                if (proto[0] == '\0') {
365
                    /* relative control URL */
366
                    if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
367
                    av_strlcat(rtsp_st->control_url, "/",
368
                               sizeof(rtsp_st->control_url));
369
                    av_strlcat(rtsp_st->control_url, p,
370
                               sizeof(rtsp_st->control_url));
371
                } else
372
                    av_strlcpy(rtsp_st->control_url, p,
373
                               sizeof(rtsp_st->control_url));
374
            }
375
        } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
376
            /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
377
            get_word(buf1, sizeof(buf1), &p);
378
            payload_type = atoi(buf1);
379
            st = s->streams[s->nb_streams - 1];
380
            rtsp_st = st->priv_data;
381
            sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
382
        } else if (av_strstart(p, "fmtp:", &p) ||
383
                   av_strstart(p, "framesize:", &p)) {
384
            /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
385
            // let dynamic protocol handlers have a stab at the line.
386
            get_word(buf1, sizeof(buf1), &p);
387
            payload_type = atoi(buf1);
388
            for (i = 0; i < s->nb_streams; i++) {
389
                st      = s->streams[i];
390
                rtsp_st = st->priv_data;
391
                if (rtsp_st->sdp_payload_type == payload_type &&
392
                    rtsp_st->dynamic_handler &&
393
                    rtsp_st->dynamic_handler->parse_sdp_a_line)
394
                    rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
395
                        rtsp_st->dynamic_protocol_context, buf);
396
            }
397
        } else if (av_strstart(p, "range:", &p)) {
398
            int64_t start, end;
399

    
400
            // this is so that seeking on a streamed file can work.
401
            rtsp_parse_range_npt(p, &start, &end);
402
            s->start_time = start;
403
            /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
404
            s->duration   = (end == AV_NOPTS_VALUE) ?
405
                            AV_NOPTS_VALUE : end - start;
406
        } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
407
            if (atoi(p) == 1)
408
                rt->transport = RTSP_TRANSPORT_RDT;
409
        } else if (av_strstart(p, "SampleRate:integer;", &p) &&
410
                   s->nb_streams > 0) {
411
            st = s->streams[s->nb_streams - 1];
412
            st->codec->sample_rate = atoi(p);
413
        } else {
414
            if (rt->server_type == RTSP_SERVER_WMS)
415
                ff_wms_parse_sdp_a_line(s, p);
416
            if (s->nb_streams > 0) {
417
                if (rt->server_type == RTSP_SERVER_REAL)
418
                    ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
419

    
420
                rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
421
                if (rtsp_st->dynamic_handler &&
422
                    rtsp_st->dynamic_handler->parse_sdp_a_line)
423
                    rtsp_st->dynamic_handler->parse_sdp_a_line(s,
424
                        s->nb_streams - 1,
425
                        rtsp_st->dynamic_protocol_context, buf);
426
            }
427
        }
428
        break;
429
    }
430
}
431

    
432
/**
433
 * Parse the sdp description and allocate the rtp streams and the
434
 * pollfd array used for udp ones.
435
 */
436

    
437
int ff_sdp_parse(AVFormatContext *s, const char *content)
438
{
439
    RTSPState *rt = s->priv_data;
440
    const char *p;
441
    int letter;
442
    /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
443
     * contain long SDP lines containing complete ASF Headers (several
444
     * kB) or arrays of MDPR (RM stream descriptor) headers plus
445
     * "rulebooks" describing their properties. Therefore, the SDP line
446
     * buffer is large.
447
     *
448
     * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
449
     * in rtpdec_xiph.c. */
450
    char buf[16384], *q;
451
    SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
452

    
453
    memset(s1, 0, sizeof(SDPParseState));
454
    p = content;
455
    for (;;) {
456
        p += strspn(p, SPACE_CHARS);
457
        letter = *p;
458
        if (letter == '\0')
459
            break;
460
        p++;
461
        if (*p != '=')
462
            goto next_line;
463
        p++;
464
        /* get the content */
465
        q = buf;
466
        while (*p != '\n' && *p != '\r' && *p != '\0') {
467
            if ((q - buf) < sizeof(buf) - 1)
468
                *q++ = *p;
469
            p++;
470
        }
471
        *q = '\0';
472
        sdp_parse_line(s, s1, letter, buf);
473
    next_line:
474
        while (*p != '\n' && *p != '\0')
475
            p++;
476
        if (*p == '\n')
477
            p++;
478
    }
479
    rt->p = av_malloc(sizeof(struct pollfd)*2*(rt->nb_rtsp_streams+1));
480
    if (!rt->p) return AVERROR(ENOMEM);
481
    return 0;
482
}
483
#endif /* CONFIG_RTPDEC */
484

    
485
void ff_rtsp_undo_setup(AVFormatContext *s)
486
{
487
    RTSPState *rt = s->priv_data;
488
    int i;
489

    
490
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
491
        RTSPStream *rtsp_st = rt->rtsp_streams[i];
492
        if (!rtsp_st)
493
            continue;
494
        if (rtsp_st->transport_priv) {
495
            if (s->oformat) {
496
                AVFormatContext *rtpctx = rtsp_st->transport_priv;
497
                av_write_trailer(rtpctx);
498
                if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
499
                    uint8_t *ptr;
500
                    url_close_dyn_buf(rtpctx->pb, &ptr);
501
                    av_free(ptr);
502
                } else {
503
                    url_fclose(rtpctx->pb);
504
                }
505
                av_metadata_free(&rtpctx->streams[0]->metadata);
506
                av_metadata_free(&rtpctx->metadata);
507
                av_free(rtpctx->streams[0]);
508
                av_free(rtpctx);
509
            } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
510
                ff_rdt_parse_close(rtsp_st->transport_priv);
511
            else if (CONFIG_RTPDEC)
512
                rtp_parse_close(rtsp_st->transport_priv);
513
        }
514
        rtsp_st->transport_priv = NULL;
515
        if (rtsp_st->rtp_handle)
516
            url_close(rtsp_st->rtp_handle);
517
        rtsp_st->rtp_handle = NULL;
518
    }
519
}
520

    
521
/* close and free RTSP streams */
522
void ff_rtsp_close_streams(AVFormatContext *s)
523
{
524
    RTSPState *rt = s->priv_data;
525
    int i;
526
    RTSPStream *rtsp_st;
527

    
528
    ff_rtsp_undo_setup(s);
529
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
530
        rtsp_st = rt->rtsp_streams[i];
531
        if (rtsp_st) {
532
            if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
533
                rtsp_st->dynamic_handler->close(
534
                    rtsp_st->dynamic_protocol_context);
535
            av_free(rtsp_st);
536
        }
537
    }
538
    av_free(rt->rtsp_streams);
539
    if (rt->asf_ctx) {
540
        av_close_input_stream (rt->asf_ctx);
541
        rt->asf_ctx = NULL;
542
    }
543
    av_free(rt->p);
544
    av_free(rt->recvbuf);
545
}
546

    
547
static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
548
{
549
    RTSPState *rt = s->priv_data;
550
    AVStream *st = NULL;
551

    
552
    /* open the RTP context */
553
    if (rtsp_st->stream_index >= 0)
554
        st = s->streams[rtsp_st->stream_index];
555
    if (!st)
556
        s->ctx_flags |= AVFMTCTX_NOHEADER;
557

    
558
    if (s->oformat && CONFIG_RTSP_MUXER) {
559
        rtsp_st->transport_priv = ff_rtp_chain_mux_open(s, st,
560
                                      rtsp_st->rtp_handle,
561
                                      RTSP_TCP_MAX_PACKET_SIZE);
562
        /* Ownership of rtp_handle is passed to the rtp mux context */
563
        rtsp_st->rtp_handle = NULL;
564
    } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
565
        rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
566
                                            rtsp_st->dynamic_protocol_context,
567
                                            rtsp_st->dynamic_handler);
568
    else if (CONFIG_RTPDEC)
569
        rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
570
                                         rtsp_st->sdp_payload_type,
571
            (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
572
            ? 0 : RTP_REORDER_QUEUE_DEFAULT_SIZE);
573

    
574
    if (!rtsp_st->transport_priv) {
575
         return AVERROR(ENOMEM);
576
    } else if (rt->transport != RTSP_TRANSPORT_RDT && CONFIG_RTPDEC) {
577
        if (rtsp_st->dynamic_handler) {
578
            rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
579
                                           rtsp_st->dynamic_protocol_context,
580
                                           rtsp_st->dynamic_handler);
581
        }
582
    }
583

    
584
    return 0;
585
}
586

    
587
#if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
588
static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
589
{
590
    const char *p;
591
    int v;
592

    
593
    p = *pp;
594
    p += strspn(p, SPACE_CHARS);
595
    v = strtol(p, (char **)&p, 10);
596
    if (*p == '-') {
597
        p++;
598
        *min_ptr = v;
599
        v = strtol(p, (char **)&p, 10);
600
        *max_ptr = v;
601
    } else {
602
        *min_ptr = v;
603
        *max_ptr = v;
604
    }
605
    *pp = p;
606
}
607

    
608
/* XXX: only one transport specification is parsed */
609
static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
610
{
611
    char transport_protocol[16];
612
    char profile[16];
613
    char lower_transport[16];
614
    char parameter[16];
615
    RTSPTransportField *th;
616
    char buf[256];
617

    
618
    reply->nb_transports = 0;
619

    
620
    for (;;) {
621
        p += strspn(p, SPACE_CHARS);
622
        if (*p == '\0')
623
            break;
624

    
625
        th = &reply->transports[reply->nb_transports];
626

    
627
        get_word_sep(transport_protocol, sizeof(transport_protocol),
628
                     "/", &p);
629
        if (!strcasecmp (transport_protocol, "rtp")) {
630
            get_word_sep(profile, sizeof(profile), "/;,", &p);
631
            lower_transport[0] = '\0';
632
            /* rtp/avp/<protocol> */
633
            if (*p == '/') {
634
                get_word_sep(lower_transport, sizeof(lower_transport),
635
                             ";,", &p);
636
            }
637
            th->transport = RTSP_TRANSPORT_RTP;
638
        } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
639
                   !strcasecmp (transport_protocol, "x-real-rdt")) {
640
            /* x-pn-tng/<protocol> */
641
            get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
642
            profile[0] = '\0';
643
            th->transport = RTSP_TRANSPORT_RDT;
644
        }
645
        if (!strcasecmp(lower_transport, "TCP"))
646
            th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
647
        else
648
            th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
649

    
650
        if (*p == ';')
651
            p++;
652
        /* get each parameter */
653
        while (*p != '\0' && *p != ',') {
654
            get_word_sep(parameter, sizeof(parameter), "=;,", &p);
655
            if (!strcmp(parameter, "port")) {
656
                if (*p == '=') {
657
                    p++;
658
                    rtsp_parse_range(&th->port_min, &th->port_max, &p);
659
                }
660
            } else if (!strcmp(parameter, "client_port")) {
661
                if (*p == '=') {
662
                    p++;
663
                    rtsp_parse_range(&th->client_port_min,
664
                                     &th->client_port_max, &p);
665
                }
666
            } else if (!strcmp(parameter, "server_port")) {
667
                if (*p == '=') {
668
                    p++;
669
                    rtsp_parse_range(&th->server_port_min,
670
                                     &th->server_port_max, &p);
671
                }
672
            } else if (!strcmp(parameter, "interleaved")) {
673
                if (*p == '=') {
674
                    p++;
675
                    rtsp_parse_range(&th->interleaved_min,
676
                                     &th->interleaved_max, &p);
677
                }
678
            } else if (!strcmp(parameter, "multicast")) {
679
                if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
680
                    th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
681
            } else if (!strcmp(parameter, "ttl")) {
682
                if (*p == '=') {
683
                    p++;
684
                    th->ttl = strtol(p, (char **)&p, 10);
685
                }
686
            } else if (!strcmp(parameter, "destination")) {
687
                if (*p == '=') {
688
                    p++;
689
                    get_word_sep(buf, sizeof(buf), ";,", &p);
690
                    get_sockaddr(buf, &th->destination);
691
                }
692
            } else if (!strcmp(parameter, "source")) {
693
                if (*p == '=') {
694
                    p++;
695
                    get_word_sep(buf, sizeof(buf), ";,", &p);
696
                    av_strlcpy(th->source, buf, sizeof(th->source));
697
                }
698
            }
699

    
700
            while (*p != ';' && *p != '\0' && *p != ',')
701
                p++;
702
            if (*p == ';')
703
                p++;
704
        }
705
        if (*p == ',')
706
            p++;
707

    
708
        reply->nb_transports++;
709
    }
710
}
711

    
712
static void handle_rtp_info(RTSPState *rt, const char *url,
713
                            uint32_t seq, uint32_t rtptime)
714
{
715
    int i;
716
    if (!rtptime || !url[0])
717
        return;
718
    if (rt->transport != RTSP_TRANSPORT_RTP)
719
        return;
720
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
721
        RTSPStream *rtsp_st = rt->rtsp_streams[i];
722
        RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
723
        if (!rtpctx)
724
            continue;
725
        if (!strcmp(rtsp_st->control_url, url)) {
726
            rtpctx->base_timestamp = rtptime;
727
            break;
728
        }
729
    }
730
}
731

    
732
static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
733
{
734
    int read = 0;
735
    char key[20], value[1024], url[1024] = "";
736
    uint32_t seq = 0, rtptime = 0;
737

    
738
    for (;;) {
739
        p += strspn(p, SPACE_CHARS);
740
        if (!*p)
741
            break;
742
        get_word_sep(key, sizeof(key), "=", &p);
743
        if (*p != '=')
744
            break;
745
        p++;
746
        get_word_sep(value, sizeof(value), ";, ", &p);
747
        read++;
748
        if (!strcmp(key, "url"))
749
            av_strlcpy(url, value, sizeof(url));
750
        else if (!strcmp(key, "seq"))
751
            seq = strtol(value, NULL, 10);
752
        else if (!strcmp(key, "rtptime"))
753
            rtptime = strtol(value, NULL, 10);
754
        if (*p == ',') {
755
            handle_rtp_info(rt, url, seq, rtptime);
756
            url[0] = '\0';
757
            seq = rtptime = 0;
758
            read = 0;
759
        }
760
        if (*p)
761
            p++;
762
    }
763
    if (read > 0)
764
        handle_rtp_info(rt, url, seq, rtptime);
765
}
766

    
767
void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
768
                        RTSPState *rt, const char *method)
769
{
770
    const char *p;
771

    
772
    /* NOTE: we do case independent match for broken servers */
773
    p = buf;
774
    if (av_stristart(p, "Session:", &p)) {
775
        int t;
776
        get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
777
        if (av_stristart(p, ";timeout=", &p) &&
778
            (t = strtol(p, NULL, 10)) > 0) {
779
            reply->timeout = t;
780
        }
781
    } else if (av_stristart(p, "Content-Length:", &p)) {
782
        reply->content_length = strtol(p, NULL, 10);
783
    } else if (av_stristart(p, "Transport:", &p)) {
784
        rtsp_parse_transport(reply, p);
785
    } else if (av_stristart(p, "CSeq:", &p)) {
786
        reply->seq = strtol(p, NULL, 10);
787
    } else if (av_stristart(p, "Range:", &p)) {
788
        rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
789
    } else if (av_stristart(p, "RealChallenge1:", &p)) {
790
        p += strspn(p, SPACE_CHARS);
791
        av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
792
    } else if (av_stristart(p, "Server:", &p)) {
793
        p += strspn(p, SPACE_CHARS);
794
        av_strlcpy(reply->server, p, sizeof(reply->server));
795
    } else if (av_stristart(p, "Notice:", &p) ||
796
               av_stristart(p, "X-Notice:", &p)) {
797
        reply->notice = strtol(p, NULL, 10);
798
    } else if (av_stristart(p, "Location:", &p)) {
799
        p += strspn(p, SPACE_CHARS);
800
        av_strlcpy(reply->location, p , sizeof(reply->location));
801
    } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
802
        p += strspn(p, SPACE_CHARS);
803
        ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
804
    } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
805
        p += strspn(p, SPACE_CHARS);
806
        ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
807
    } else if (av_stristart(p, "Content-Base:", &p) && rt) {
808
        p += strspn(p, SPACE_CHARS);
809
        if (method && !strcmp(method, "DESCRIBE"))
810
            av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
811
    } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
812
        p += strspn(p, SPACE_CHARS);
813
        if (method && !strcmp(method, "PLAY"))
814
            rtsp_parse_rtp_info(rt, p);
815
    }
816
}
817

    
818
/* skip a RTP/TCP interleaved packet */
819
void ff_rtsp_skip_packet(AVFormatContext *s)
820
{
821
    RTSPState *rt = s->priv_data;
822
    int ret, len, len1;
823
    uint8_t buf[1024];
824

    
825
    ret = url_read_complete(rt->rtsp_hd, buf, 3);
826
    if (ret != 3)
827
        return;
828
    len = AV_RB16(buf + 1);
829

    
830
    av_dlog(s, "skipping RTP packet len=%d\n", len);
831

    
832
    /* skip payload */
833
    while (len > 0) {
834
        len1 = len;
835
        if (len1 > sizeof(buf))
836
            len1 = sizeof(buf);
837
        ret = url_read_complete(rt->rtsp_hd, buf, len1);
838
        if (ret != len1)
839
            return;
840
        len -= len1;
841
    }
842
}
843

    
844
int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
845
                       unsigned char **content_ptr,
846
                       int return_on_interleaved_data, const char *method)
847
{
848
    RTSPState *rt = s->priv_data;
849
    char buf[4096], buf1[1024], *q;
850
    unsigned char ch;
851
    const char *p;
852
    int ret, content_length, line_count = 0;
853
    unsigned char *content = NULL;
854

    
855
    memset(reply, 0, sizeof(*reply));
856

    
857
    /* parse reply (XXX: use buffers) */
858
    rt->last_reply[0] = '\0';
859
    for (;;) {
860
        q = buf;
861
        for (;;) {
862
            ret = url_read_complete(rt->rtsp_hd, &ch, 1);
863
#ifdef DEBUG_RTP_TCP
864
            av_dlog(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
865
#endif
866
            if (ret != 1)
867
                return AVERROR_EOF;
868
            if (ch == '\n')
869
                break;
870
            if (ch == '$') {
871
                /* XXX: only parse it if first char on line ? */
872
                if (return_on_interleaved_data) {
873
                    return 1;
874
                } else
875
                    ff_rtsp_skip_packet(s);
876
            } else if (ch != '\r') {
877
                if ((q - buf) < sizeof(buf) - 1)
878
                    *q++ = ch;
879
            }
880
        }
881
        *q = '\0';
882

    
883
        av_dlog(s, "line='%s'\n", buf);
884

    
885
        /* test if last line */
886
        if (buf[0] == '\0')
887
            break;
888
        p = buf;
889
        if (line_count == 0) {
890
            /* get reply code */
891
            get_word(buf1, sizeof(buf1), &p);
892
            get_word(buf1, sizeof(buf1), &p);
893
            reply->status_code = atoi(buf1);
894
            av_strlcpy(reply->reason, p, sizeof(reply->reason));
895
        } else {
896
            ff_rtsp_parse_line(reply, p, rt, method);
897
            av_strlcat(rt->last_reply, p,    sizeof(rt->last_reply));
898
            av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
899
        }
900
        line_count++;
901
    }
902

    
903
    if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
904
        av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
905

    
906
    content_length = reply->content_length;
907
    if (content_length > 0) {
908
        /* leave some room for a trailing '\0' (useful for simple parsing) */
909
        content = av_malloc(content_length + 1);
910
        (void)url_read_complete(rt->rtsp_hd, content, content_length);
911
        content[content_length] = '\0';
912
    }
913
    if (content_ptr)
914
        *content_ptr = content;
915
    else
916
        av_free(content);
917

    
918
    if (rt->seq != reply->seq) {
919
        av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
920
            rt->seq, reply->seq);
921
    }
922

    
923
    /* EOS */
924
    if (reply->notice == 2101 /* End-of-Stream Reached */      ||
925
        reply->notice == 2104 /* Start-of-Stream Reached */    ||
926
        reply->notice == 2306 /* Continuous Feed Terminated */) {
927
        rt->state = RTSP_STATE_IDLE;
928
    } else if (reply->notice >= 4400 && reply->notice < 5500) {
929
        return AVERROR(EIO); /* data or server error */
930
    } else if (reply->notice == 2401 /* Ticket Expired */ ||
931
             (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
932
        return AVERROR(EPERM);
933

    
934
    return 0;
935
}
936

    
937
/**
938
 * Send a command to the RTSP server without waiting for the reply.
939
 *
940
 * @param s RTSP (de)muxer context
941
 * @param method the method for the request
942
 * @param url the target url for the request
943
 * @param headers extra header lines to include in the request
944
 * @param send_content if non-null, the data to send as request body content
945
 * @param send_content_length the length of the send_content data, or 0 if
946
 *                            send_content is null
947
 *
948
 * @return zero if success, nonzero otherwise
949
 */
950
static int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
951
                                               const char *method, const char *url,
952
                                               const char *headers,
953
                                               const unsigned char *send_content,
954
                                               int send_content_length)
955
{
956
    RTSPState *rt = s->priv_data;
957
    char buf[4096], *out_buf;
958
    char base64buf[AV_BASE64_SIZE(sizeof(buf))];
959

    
960
    /* Add in RTSP headers */
961
    out_buf = buf;
962
    rt->seq++;
963
    snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
964
    if (headers)
965
        av_strlcat(buf, headers, sizeof(buf));
966
    av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
967
    if (rt->session_id[0] != '\0' && (!headers ||
968
        !strstr(headers, "\nIf-Match:"))) {
969
        av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
970
    }
971
    if (rt->auth[0]) {
972
        char *str = ff_http_auth_create_response(&rt->auth_state,
973
                                                 rt->auth, url, method);
974
        if (str)
975
            av_strlcat(buf, str, sizeof(buf));
976
        av_free(str);
977
    }
978
    if (send_content_length > 0 && send_content)
979
        av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
980
    av_strlcat(buf, "\r\n", sizeof(buf));
981

    
982
    /* base64 encode rtsp if tunneling */
983
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
984
        av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
985
        out_buf = base64buf;
986
    }
987

    
988
    av_dlog(s, "Sending:\n%s--\n", buf);
989

    
990
    url_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
991
    if (send_content_length > 0 && send_content) {
992
        if (rt->control_transport == RTSP_MODE_TUNNEL) {
993
            av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
994
                                    "with content data not supported\n");
995
            return AVERROR_PATCHWELCOME;
996
        }
997
        url_write(rt->rtsp_hd_out, send_content, send_content_length);
998
    }
999
    rt->last_cmd_time = av_gettime();
1000

    
1001
    return 0;
1002
}
1003

    
1004
int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1005
                           const char *url, const char *headers)
1006
{
1007
    return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1008
}
1009

    
1010
int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1011
                     const char *headers, RTSPMessageHeader *reply,
1012
                     unsigned char **content_ptr)
1013
{
1014
    return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1015
                                         content_ptr, NULL, 0);
1016
}
1017

    
1018
int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1019
                                  const char *method, const char *url,
1020
                                  const char *header,
1021
                                  RTSPMessageHeader *reply,
1022
                                  unsigned char **content_ptr,
1023
                                  const unsigned char *send_content,
1024
                                  int send_content_length)
1025
{
1026
    RTSPState *rt = s->priv_data;
1027
    HTTPAuthType cur_auth_type;
1028
    int ret;
1029

    
1030
retry:
1031
    cur_auth_type = rt->auth_state.auth_type;
1032
    if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
1033
                                                   send_content,
1034
                                                   send_content_length)))
1035
        return ret;
1036

    
1037
    if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1038
        return ret;
1039

    
1040
    if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
1041
        rt->auth_state.auth_type != HTTP_AUTH_NONE)
1042
        goto retry;
1043

    
1044
    if (reply->status_code > 400){
1045
        av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1046
               method,
1047
               reply->status_code,
1048
               reply->reason);
1049
        av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1050
    }
1051

    
1052
    return 0;
1053
}
1054

    
1055
/**
1056
 * @return 0 on success, <0 on error, 1 if protocol is unavailable.
1057
 */
1058
int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1059
                              int lower_transport, const char *real_challenge)
1060
{
1061
    RTSPState *rt = s->priv_data;
1062
    int rtx, j, i, err, interleave = 0;
1063
    RTSPStream *rtsp_st;
1064
    RTSPMessageHeader reply1, *reply = &reply1;
1065
    char cmd[2048];
1066
    const char *trans_pref;
1067

    
1068
    if (rt->transport == RTSP_TRANSPORT_RDT)
1069
        trans_pref = "x-pn-tng";
1070
    else
1071
        trans_pref = "RTP/AVP";
1072

    
1073
    /* default timeout: 1 minute */
1074
    rt->timeout = 60;
1075

    
1076
    /* for each stream, make the setup request */
1077
    /* XXX: we assume the same server is used for the control of each
1078
     * RTSP stream */
1079

    
1080
    for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1081
        char transport[2048];
1082

    
1083
        /**
1084
         * WMS serves all UDP data over a single connection, the RTX, which
1085
         * isn't necessarily the first in the SDP but has to be the first
1086
         * to be set up, else the second/third SETUP will fail with a 461.
1087
         */
1088
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1089
             rt->server_type == RTSP_SERVER_WMS) {
1090
            if (i == 0) {
1091
                /* rtx first */
1092
                for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1093
                    int len = strlen(rt->rtsp_streams[rtx]->control_url);
1094
                    if (len >= 4 &&
1095
                        !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1096
                                "/rtx"))
1097
                        break;
1098
                }
1099
                if (rtx == rt->nb_rtsp_streams)
1100
                    return -1; /* no RTX found */
1101
                rtsp_st = rt->rtsp_streams[rtx];
1102
            } else
1103
                rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1104
        } else
1105
            rtsp_st = rt->rtsp_streams[i];
1106

    
1107
        /* RTP/UDP */
1108
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1109
            char buf[256];
1110

    
1111
            if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1112
                port = reply->transports[0].client_port_min;
1113
                goto have_port;
1114
            }
1115

    
1116
            /* first try in specified port range */
1117
            if (RTSP_RTP_PORT_MIN != 0) {
1118
                while (j <= RTSP_RTP_PORT_MAX) {
1119
                    ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1120
                                "?localport=%d", j);
1121
                    /* we will use two ports per rtp stream (rtp and rtcp) */
1122
                    j += 2;
1123
                    if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1124
                        goto rtp_opened;
1125
                }
1126
            }
1127

    
1128
#if 0
1129
            /* then try on any port */
1130
            if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1131
                err = AVERROR_INVALIDDATA;
1132
                goto fail;
1133
            }
1134
#else
1135
            av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1136
            err = AVERROR(EIO);
1137
            goto fail;
1138
#endif
1139

    
1140
        rtp_opened:
1141
            port = rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1142
        have_port:
1143
            snprintf(transport, sizeof(transport) - 1,
1144
                     "%s/UDP;", trans_pref);
1145
            if (rt->server_type != RTSP_SERVER_REAL)
1146
                av_strlcat(transport, "unicast;", sizeof(transport));
1147
            av_strlcatf(transport, sizeof(transport),
1148
                     "client_port=%d", port);
1149
            if (rt->transport == RTSP_TRANSPORT_RTP &&
1150
                !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1151
                av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1152
        }
1153

    
1154
        /* RTP/TCP */
1155
        else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1156
            /** For WMS streams, the application streams are only used for
1157
             * UDP. When trying to set it up for TCP streams, the server
1158
             * will return an error. Therefore, we skip those streams. */
1159
            if (rt->server_type == RTSP_SERVER_WMS &&
1160
                s->streams[rtsp_st->stream_index]->codec->codec_type ==
1161
                    AVMEDIA_TYPE_DATA)
1162
                continue;
1163
            snprintf(transport, sizeof(transport) - 1,
1164
                     "%s/TCP;", trans_pref);
1165
            if (rt->server_type == RTSP_SERVER_WMS)
1166
                av_strlcat(transport, "unicast;", sizeof(transport));
1167
            av_strlcatf(transport, sizeof(transport),
1168
                        "interleaved=%d-%d",
1169
                        interleave, interleave + 1);
1170
            interleave += 2;
1171
        }
1172

    
1173
        else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1174
            snprintf(transport, sizeof(transport) - 1,
1175
                     "%s/UDP;multicast", trans_pref);
1176
        }
1177
        if (s->oformat) {
1178
            av_strlcat(transport, ";mode=receive", sizeof(transport));
1179
        } else if (rt->server_type == RTSP_SERVER_REAL ||
1180
                   rt->server_type == RTSP_SERVER_WMS)
1181
            av_strlcat(transport, ";mode=play", sizeof(transport));
1182
        snprintf(cmd, sizeof(cmd),
1183
                 "Transport: %s\r\n",
1184
                 transport);
1185
        if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1186
            char real_res[41], real_csum[9];
1187
            ff_rdt_calc_response_and_checksum(real_res, real_csum,
1188
                                              real_challenge);
1189
            av_strlcatf(cmd, sizeof(cmd),
1190
                        "If-Match: %s\r\n"
1191
                        "RealChallenge2: %s, sd=%s\r\n",
1192
                        rt->session_id, real_res, real_csum);
1193
        }
1194
        ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1195
        if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1196
            err = 1;
1197
            goto fail;
1198
        } else if (reply->status_code != RTSP_STATUS_OK ||
1199
                   reply->nb_transports != 1) {
1200
            err = AVERROR_INVALIDDATA;
1201
            goto fail;
1202
        }
1203

    
1204
        /* XXX: same protocol for all streams is required */
1205
        if (i > 0) {
1206
            if (reply->transports[0].lower_transport != rt->lower_transport ||
1207
                reply->transports[0].transport != rt->transport) {
1208
                err = AVERROR_INVALIDDATA;
1209
                goto fail;
1210
            }
1211
        } else {
1212
            rt->lower_transport = reply->transports[0].lower_transport;
1213
            rt->transport = reply->transports[0].transport;
1214
        }
1215

    
1216
        /* Fail if the server responded with another lower transport mode
1217
         * than what we requested. */
1218
        if (reply->transports[0].lower_transport != lower_transport) {
1219
            av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1220
            err = AVERROR_INVALIDDATA;
1221
            goto fail;
1222
        }
1223

    
1224
        switch(reply->transports[0].lower_transport) {
1225
        case RTSP_LOWER_TRANSPORT_TCP:
1226
            rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1227
            rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1228
            break;
1229

    
1230
        case RTSP_LOWER_TRANSPORT_UDP: {
1231
            char url[1024], options[30] = "";
1232

    
1233
            if (rt->filter_source)
1234
                av_strlcpy(options, "?connect=1", sizeof(options));
1235
            /* Use source address if specified */
1236
            if (reply->transports[0].source[0]) {
1237
                ff_url_join(url, sizeof(url), "rtp", NULL,
1238
                            reply->transports[0].source,
1239
                            reply->transports[0].server_port_min, options);
1240
            } else {
1241
                ff_url_join(url, sizeof(url), "rtp", NULL, host,
1242
                            reply->transports[0].server_port_min, options);
1243
            }
1244
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1245
                rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1246
                err = AVERROR_INVALIDDATA;
1247
                goto fail;
1248
            }
1249
            /* Try to initialize the connection state in a
1250
             * potential NAT router by sending dummy packets.
1251
             * RTP/RTCP dummy packets are used for RDT, too.
1252
             */
1253
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1254
                CONFIG_RTPDEC)
1255
                rtp_send_punch_packets(rtsp_st->rtp_handle);
1256
            break;
1257
        }
1258
        case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1259
            char url[1024], namebuf[50];
1260
            struct sockaddr_storage addr;
1261
            int port, ttl;
1262

    
1263
            if (reply->transports[0].destination.ss_family) {
1264
                addr      = reply->transports[0].destination;
1265
                port      = reply->transports[0].port_min;
1266
                ttl       = reply->transports[0].ttl;
1267
            } else {
1268
                addr      = rtsp_st->sdp_ip;
1269
                port      = rtsp_st->sdp_port;
1270
                ttl       = rtsp_st->sdp_ttl;
1271
            }
1272
            getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1273
                        namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1274
            ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1275
                        port, "?ttl=%d", ttl);
1276
            if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1277
                err = AVERROR_INVALIDDATA;
1278
                goto fail;
1279
            }
1280
            break;
1281
        }
1282
        }
1283

    
1284
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1285
            goto fail;
1286
    }
1287

    
1288
    if (reply->timeout > 0)
1289
        rt->timeout = reply->timeout;
1290

    
1291
    if (rt->server_type == RTSP_SERVER_REAL)
1292
        rt->need_subscription = 1;
1293

    
1294
    return 0;
1295

    
1296
fail:
1297
    ff_rtsp_undo_setup(s);
1298
    return err;
1299
}
1300

    
1301
void ff_rtsp_close_connections(AVFormatContext *s)
1302
{
1303
    RTSPState *rt = s->priv_data;
1304
    if (rt->rtsp_hd_out != rt->rtsp_hd) url_close(rt->rtsp_hd_out);
1305
    url_close(rt->rtsp_hd);
1306
    rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1307
}
1308

    
1309
int ff_rtsp_connect(AVFormatContext *s)
1310
{
1311
    RTSPState *rt = s->priv_data;
1312
    char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1313
    char *option_list, *option, *filename;
1314
    int port, err, tcp_fd;
1315
    RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1316
    int lower_transport_mask = 0;
1317
    char real_challenge[64] = "";
1318
    struct sockaddr_storage peer;
1319
    socklen_t peer_len = sizeof(peer);
1320

    
1321
    if (!ff_network_init())
1322
        return AVERROR(EIO);
1323
redirect:
1324
    rt->control_transport = RTSP_MODE_PLAIN;
1325
    /* extract hostname and port */
1326
    av_url_split(NULL, 0, auth, sizeof(auth),
1327
                 host, sizeof(host), &port, path, sizeof(path), s->filename);
1328
    if (*auth) {
1329
        av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1330
    }
1331
    if (port < 0)
1332
        port = RTSP_DEFAULT_PORT;
1333

    
1334
    /* search for options */
1335
    option_list = strrchr(path, '?');
1336
    if (option_list) {
1337
        /* Strip out the RTSP specific options, write out the rest of
1338
         * the options back into the same string. */
1339
        filename = option_list;
1340
        while (option_list) {
1341
            /* move the option pointer */
1342
            option = ++option_list;
1343
            option_list = strchr(option_list, '&');
1344
            if (option_list)
1345
                *option_list = 0;
1346

    
1347
            /* handle the options */
1348
            if (!strcmp(option, "udp")) {
1349
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
1350
            } else if (!strcmp(option, "multicast")) {
1351
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1352
            } else if (!strcmp(option, "tcp")) {
1353
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1354
            } else if(!strcmp(option, "http")) {
1355
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1356
                rt->control_transport = RTSP_MODE_TUNNEL;
1357
            } else if (!strcmp(option, "filter_src")) {
1358
                rt->filter_source = 1;
1359
            } else {
1360
                /* Write options back into the buffer, using memmove instead
1361
                 * of strcpy since the strings may overlap. */
1362
                int len = strlen(option);
1363
                memmove(++filename, option, len);
1364
                filename += len;
1365
                if (option_list) *filename = '&';
1366
            }
1367
        }
1368
        *filename = 0;
1369
    }
1370

    
1371
    if (!lower_transport_mask)
1372
        lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1373

    
1374
    if (s->oformat) {
1375
        /* Only UDP or TCP - UDP multicast isn't supported. */
1376
        lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1377
                                (1 << RTSP_LOWER_TRANSPORT_TCP);
1378
        if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1379
            av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1380
                                    "only UDP and TCP are supported for output.\n");
1381
            err = AVERROR(EINVAL);
1382
            goto fail;
1383
        }
1384
    }
1385

    
1386
    /* Construct the URI used in request; this is similar to s->filename,
1387
     * but with authentication credentials removed and RTSP specific options
1388
     * stripped out. */
1389
    ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1390
                host, port, "%s", path);
1391

    
1392
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
1393
        /* set up initial handshake for tunneling */
1394
        char httpname[1024];
1395
        char sessioncookie[17];
1396
        char headers[1024];
1397

    
1398
        ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1399
        snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1400
                 av_get_random_seed(), av_get_random_seed());
1401

    
1402
        /* GET requests */
1403
        if (url_alloc(&rt->rtsp_hd, httpname, URL_RDONLY) < 0) {
1404
            err = AVERROR(EIO);
1405
            goto fail;
1406
        }
1407

    
1408
        /* generate GET headers */
1409
        snprintf(headers, sizeof(headers),
1410
                 "x-sessioncookie: %s\r\n"
1411
                 "Accept: application/x-rtsp-tunnelled\r\n"
1412
                 "Pragma: no-cache\r\n"
1413
                 "Cache-Control: no-cache\r\n",
1414
                 sessioncookie);
1415
        ff_http_set_headers(rt->rtsp_hd, headers);
1416

    
1417
        /* complete the connection */
1418
        if (url_connect(rt->rtsp_hd)) {
1419
            err = AVERROR(EIO);
1420
            goto fail;
1421
        }
1422

    
1423
        /* POST requests */
1424
        if (url_alloc(&rt->rtsp_hd_out, httpname, URL_WRONLY) < 0 ) {
1425
            err = AVERROR(EIO);
1426
            goto fail;
1427
        }
1428

    
1429
        /* generate POST headers */
1430
        snprintf(headers, sizeof(headers),
1431
                 "x-sessioncookie: %s\r\n"
1432
                 "Content-Type: application/x-rtsp-tunnelled\r\n"
1433
                 "Pragma: no-cache\r\n"
1434
                 "Cache-Control: no-cache\r\n"
1435
                 "Content-Length: 32767\r\n"
1436
                 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1437
                 sessioncookie);
1438
        ff_http_set_headers(rt->rtsp_hd_out, headers);
1439
        ff_http_set_chunked_transfer_encoding(rt->rtsp_hd_out, 0);
1440

    
1441
        /* Initialize the authentication state for the POST session. The HTTP
1442
         * protocol implementation doesn't properly handle multi-pass
1443
         * authentication for POST requests, since it would require one of
1444
         * the following:
1445
         * - implementing Expect: 100-continue, which many HTTP servers
1446
         *   don't support anyway, even less the RTSP servers that do HTTP
1447
         *   tunneling
1448
         * - sending the whole POST data until getting a 401 reply specifying
1449
         *   what authentication method to use, then resending all that data
1450
         * - waiting for potential 401 replies directly after sending the
1451
         *   POST header (waiting for some unspecified time)
1452
         * Therefore, we copy the full auth state, which works for both basic
1453
         * and digest. (For digest, we would have to synchronize the nonce
1454
         * count variable between the two sessions, if we'd do more requests
1455
         * with the original session, though.)
1456
         */
1457
        ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1458

    
1459
        /* complete the connection */
1460
        if (url_connect(rt->rtsp_hd_out)) {
1461
            err = AVERROR(EIO);
1462
            goto fail;
1463
        }
1464
    } else {
1465
        /* open the tcp connection */
1466
        ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1467
        if (url_open(&rt->rtsp_hd, tcpname, URL_RDWR) < 0) {
1468
            err = AVERROR(EIO);
1469
            goto fail;
1470
        }
1471
        rt->rtsp_hd_out = rt->rtsp_hd;
1472
    }
1473
    rt->seq = 0;
1474

    
1475
    tcp_fd = url_get_file_handle(rt->rtsp_hd);
1476
    if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1477
        getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1478
                    NULL, 0, NI_NUMERICHOST);
1479
    }
1480

    
1481
    /* request options supported by the server; this also detects server
1482
     * type */
1483
    for (rt->server_type = RTSP_SERVER_RTP;;) {
1484
        cmd[0] = 0;
1485
        if (rt->server_type == RTSP_SERVER_REAL)
1486
            av_strlcat(cmd,
1487
                       /**
1488
                        * The following entries are required for proper
1489
                        * streaming from a Realmedia server. They are
1490
                        * interdependent in some way although we currently
1491
                        * don't quite understand how. Values were copied
1492
                        * from mplayer SVN r23589.
1493
                        * @param CompanyID is a 16-byte ID in base64
1494
                        * @param ClientChallenge is a 16-byte ID in hex
1495
                        */
1496
                       "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1497
                       "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1498
                       "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1499
                       "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1500
                       sizeof(cmd));
1501
        ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1502
        if (reply->status_code != RTSP_STATUS_OK) {
1503
            err = AVERROR_INVALIDDATA;
1504
            goto fail;
1505
        }
1506

    
1507
        /* detect server type if not standard-compliant RTP */
1508
        if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1509
            rt->server_type = RTSP_SERVER_REAL;
1510
            continue;
1511
        } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1512
            rt->server_type = RTSP_SERVER_WMS;
1513
        } else if (rt->server_type == RTSP_SERVER_REAL)
1514
            strcpy(real_challenge, reply->real_challenge);
1515
        break;
1516
    }
1517

    
1518
    if (s->iformat && CONFIG_RTSP_DEMUXER)
1519
        err = ff_rtsp_setup_input_streams(s, reply);
1520
    else if (CONFIG_RTSP_MUXER)
1521
        err = ff_rtsp_setup_output_streams(s, host);
1522
    if (err)
1523
        goto fail;
1524

    
1525
    do {
1526
        int lower_transport = ff_log2_tab[lower_transport_mask &
1527
                                  ~(lower_transport_mask - 1)];
1528

    
1529
        err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1530
                                 rt->server_type == RTSP_SERVER_REAL ?
1531
                                     real_challenge : NULL);
1532
        if (err < 0)
1533
            goto fail;
1534
        lower_transport_mask &= ~(1 << lower_transport);
1535
        if (lower_transport_mask == 0 && err == 1) {
1536
            err = FF_NETERROR(EPROTONOSUPPORT);
1537
            goto fail;
1538
        }
1539
    } while (err);
1540

    
1541
    rt->lower_transport_mask = lower_transport_mask;
1542
    av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1543
    rt->state = RTSP_STATE_IDLE;
1544
    rt->seek_timestamp = 0; /* default is to start stream at position zero */
1545
    return 0;
1546
 fail:
1547
    ff_rtsp_close_streams(s);
1548
    ff_rtsp_close_connections(s);
1549
    if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1550
        av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1551
        av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1552
               reply->status_code,
1553
               s->filename);
1554
        goto redirect;
1555
    }
1556
    ff_network_close();
1557
    return err;
1558
}
1559
#endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1560

    
1561
#if CONFIG_RTPDEC
1562
static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1563
                           uint8_t *buf, int buf_size, int64_t wait_end)
1564
{
1565
    RTSPState *rt = s->priv_data;
1566
    RTSPStream *rtsp_st;
1567
    int n, i, ret, tcp_fd, timeout_cnt = 0;
1568
    int max_p = 0;
1569
    struct pollfd *p = rt->p;
1570

    
1571
    for (;;) {
1572
        if (url_interrupt_cb())
1573
            return AVERROR(EINTR);
1574
        if (wait_end && wait_end - av_gettime() < 0)
1575
            return AVERROR(EAGAIN);
1576
        max_p = 0;
1577
        if (rt->rtsp_hd) {
1578
            tcp_fd = url_get_file_handle(rt->rtsp_hd);
1579
            p[max_p].fd = tcp_fd;
1580
            p[max_p++].events = POLLIN;
1581
        } else {
1582
            tcp_fd = -1;
1583
        }
1584
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1585
            rtsp_st = rt->rtsp_streams[i];
1586
            if (rtsp_st->rtp_handle) {
1587
                p[max_p].fd = url_get_file_handle(rtsp_st->rtp_handle);
1588
                p[max_p++].events = POLLIN;
1589
                p[max_p].fd = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1590
                p[max_p++].events = POLLIN;
1591
            }
1592
        }
1593
        n = poll(p, max_p, POLL_TIMEOUT_MS);
1594
        if (n > 0) {
1595
            int j = 1 - (tcp_fd == -1);
1596
            timeout_cnt = 0;
1597
            for (i = 0; i < rt->nb_rtsp_streams; i++) {
1598
                rtsp_st = rt->rtsp_streams[i];
1599
                if (rtsp_st->rtp_handle) {
1600
                    if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
1601
                        ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1602
                        if (ret > 0) {
1603
                            *prtsp_st = rtsp_st;
1604
                            return ret;
1605
                        }
1606
                    }
1607
                    j+=2;
1608
                }
1609
            }
1610
#if CONFIG_RTSP_DEMUXER
1611
            if (tcp_fd != -1 && p[0].revents & POLLIN) {
1612
                RTSPMessageHeader reply;
1613

    
1614
                ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1615
                if (ret < 0)
1616
                    return ret;
1617
                /* XXX: parse message */
1618
                if (rt->state != RTSP_STATE_STREAMING)
1619
                    return 0;
1620
            }
1621
#endif
1622
        } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1623
            return FF_NETERROR(ETIMEDOUT);
1624
        } else if (n < 0 && errno != EINTR)
1625
            return AVERROR(errno);
1626
    }
1627
}
1628

    
1629
int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1630
{
1631
    RTSPState *rt = s->priv_data;
1632
    int ret, len;
1633
    RTSPStream *rtsp_st, *first_queue_st = NULL;
1634
    int64_t wait_end = 0;
1635

    
1636
    if (rt->nb_byes == rt->nb_rtsp_streams)
1637
        return AVERROR_EOF;
1638

    
1639
    /* get next frames from the same RTP packet */
1640
    if (rt->cur_transport_priv) {
1641
        if (rt->transport == RTSP_TRANSPORT_RDT) {
1642
            ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1643
        } else
1644
            ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1645
        if (ret == 0) {
1646
            rt->cur_transport_priv = NULL;
1647
            return 0;
1648
        } else if (ret == 1) {
1649
            return 0;
1650
        } else
1651
            rt->cur_transport_priv = NULL;
1652
    }
1653

    
1654
    if (rt->transport == RTSP_TRANSPORT_RTP) {
1655
        int i;
1656
        int64_t first_queue_time = 0;
1657
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1658
            RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1659
            int64_t queue_time;
1660
            if (!rtpctx)
1661
                continue;
1662
            queue_time = ff_rtp_queued_packet_time(rtpctx);
1663
            if (queue_time && (queue_time - first_queue_time < 0 ||
1664
                               !first_queue_time)) {
1665
                first_queue_time = queue_time;
1666
                first_queue_st   = rt->rtsp_streams[i];
1667
            }
1668
        }
1669
        if (first_queue_time)
1670
            wait_end = first_queue_time + s->max_delay;
1671
    }
1672

    
1673
    /* read next RTP packet */
1674
 redo:
1675
    if (!rt->recvbuf) {
1676
        rt->recvbuf = av_malloc(RECVBUF_SIZE);
1677
        if (!rt->recvbuf)
1678
            return AVERROR(ENOMEM);
1679
    }
1680

    
1681
    switch(rt->lower_transport) {
1682
    default:
1683
#if CONFIG_RTSP_DEMUXER
1684
    case RTSP_LOWER_TRANSPORT_TCP:
1685
        len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
1686
        break;
1687
#endif
1688
    case RTSP_LOWER_TRANSPORT_UDP:
1689
    case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1690
        len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
1691
        if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1692
            rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1693
        break;
1694
    }
1695
    if (len == AVERROR(EAGAIN) && first_queue_st &&
1696
        rt->transport == RTSP_TRANSPORT_RTP) {
1697
        rtsp_st = first_queue_st;
1698
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
1699
        goto end;
1700
    }
1701
    if (len < 0)
1702
        return len;
1703
    if (len == 0)
1704
        return AVERROR_EOF;
1705
    if (rt->transport == RTSP_TRANSPORT_RDT) {
1706
        ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1707
    } else {
1708
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1709
        if (ret < 0) {
1710
            /* Either bad packet, or a RTCP packet. Check if the
1711
             * first_rtcp_ntp_time field was initialized. */
1712
            RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1713
            if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1714
                /* first_rtcp_ntp_time has been initialized for this stream,
1715
                 * copy the same value to all other uninitialized streams,
1716
                 * in order to map their timestamp origin to the same ntp time
1717
                 * as this one. */
1718
                int i;
1719
                AVStream *st = NULL;
1720
                if (rtsp_st->stream_index >= 0)
1721
                    st = s->streams[rtsp_st->stream_index];
1722
                for (i = 0; i < rt->nb_rtsp_streams; i++) {
1723
                    RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
1724
                    AVStream *st2 = NULL;
1725
                    if (rt->rtsp_streams[i]->stream_index >= 0)
1726
                        st2 = s->streams[rt->rtsp_streams[i]->stream_index];
1727
                    if (rtpctx2 && st && st2 &&
1728
                        rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
1729
                        rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1730
                        rtpctx2->rtcp_ts_offset = av_rescale_q(
1731
                            rtpctx->rtcp_ts_offset, st->time_base,
1732
                            st2->time_base);
1733
                    }
1734
                }
1735
            }
1736
            if (ret == -RTCP_BYE) {
1737
                rt->nb_byes++;
1738

    
1739
                av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1740
                       rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1741

    
1742
                if (rt->nb_byes == rt->nb_rtsp_streams)
1743
                    return AVERROR_EOF;
1744
            }
1745
        }
1746
    }
1747
end:
1748
    if (ret < 0)
1749
        goto redo;
1750
    if (ret == 1)
1751
        /* more packets may follow, so we save the RTP context */
1752
        rt->cur_transport_priv = rtsp_st->transport_priv;
1753

    
1754
    return ret;
1755
}
1756
#endif /* CONFIG_RTPDEC */
1757

    
1758
#if CONFIG_SDP_DEMUXER
1759
static int sdp_probe(AVProbeData *p1)
1760
{
1761
    const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1762

    
1763
    /* we look for a line beginning "c=IN IP" */
1764
    while (p < p_end && *p != '\0') {
1765
        if (p + sizeof("c=IN IP") - 1 < p_end &&
1766
            av_strstart(p, "c=IN IP", NULL))
1767
            return AVPROBE_SCORE_MAX / 2;
1768

    
1769
        while (p < p_end - 1 && *p != '\n') p++;
1770
        if (++p >= p_end)
1771
            break;
1772
        if (*p == '\r')
1773
            p++;
1774
    }
1775
    return 0;
1776
}
1777

    
1778
static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1779
{
1780
    RTSPState *rt = s->priv_data;
1781
    RTSPStream *rtsp_st;
1782
    int size, i, err;
1783
    char *content;
1784
    char url[1024];
1785

    
1786
    if (!ff_network_init())
1787
        return AVERROR(EIO);
1788

    
1789
    /* read the whole sdp file */
1790
    /* XXX: better loading */
1791
    content = av_malloc(SDP_MAX_SIZE);
1792
    size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1793
    if (size <= 0) {
1794
        av_free(content);
1795
        return AVERROR_INVALIDDATA;
1796
    }
1797
    content[size] ='\0';
1798

    
1799
    err = ff_sdp_parse(s, content);
1800
    av_free(content);
1801
    if (err) goto fail;
1802

    
1803
    /* open each RTP stream */
1804
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
1805
        char namebuf[50];
1806
        rtsp_st = rt->rtsp_streams[i];
1807

    
1808
        getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
1809
                    namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1810
        ff_url_join(url, sizeof(url), "rtp", NULL,
1811
                    namebuf, rtsp_st->sdp_port,
1812
                    "?localport=%d&ttl=%d", rtsp_st->sdp_port,
1813
                    rtsp_st->sdp_ttl);
1814
        if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1815
            err = AVERROR_INVALIDDATA;
1816
            goto fail;
1817
        }
1818
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1819
            goto fail;
1820
    }
1821
    return 0;
1822
fail:
1823
    ff_rtsp_close_streams(s);
1824
    ff_network_close();
1825
    return err;
1826
}
1827

    
1828
static int sdp_read_close(AVFormatContext *s)
1829
{
1830
    ff_rtsp_close_streams(s);
1831
    ff_network_close();
1832
    return 0;
1833
}
1834

    
1835
AVInputFormat ff_sdp_demuxer = {
1836
    "sdp",
1837
    NULL_IF_CONFIG_SMALL("SDP"),
1838
    sizeof(RTSPState),
1839
    sdp_probe,
1840
    sdp_read_header,
1841
    ff_rtsp_fetch_packet,
1842
    sdp_read_close,
1843
};
1844
#endif /* CONFIG_SDP_DEMUXER */
1845

    
1846
#if CONFIG_RTP_DEMUXER
1847
static int rtp_probe(AVProbeData *p)
1848
{
1849
    if (av_strstart(p->filename, "rtp:", NULL))
1850
        return AVPROBE_SCORE_MAX;
1851
    return 0;
1852
}
1853

    
1854
static int rtp_read_header(AVFormatContext *s,
1855
                           AVFormatParameters *ap)
1856
{
1857
    uint8_t recvbuf[1500];
1858
    char host[500], sdp[500];
1859
    int ret, port;
1860
    URLContext* in = NULL;
1861
    int payload_type;
1862
    AVCodecContext codec;
1863
    struct sockaddr_storage addr;
1864
    ByteIOContext pb;
1865
    socklen_t addrlen = sizeof(addr);
1866

    
1867
    if (!ff_network_init())
1868
        return AVERROR(EIO);
1869

    
1870
    ret = url_open(&in, s->filename, URL_RDONLY);
1871
    if (ret)
1872
        goto fail;
1873

    
1874
    while (1) {
1875
        ret = url_read(in, recvbuf, sizeof(recvbuf));
1876
        if (ret == AVERROR(EAGAIN))
1877
            continue;
1878
        if (ret < 0)
1879
            goto fail;
1880
        if (ret < 12) {
1881
            av_log(s, AV_LOG_WARNING, "Received too short packet\n");
1882
            continue;
1883
        }
1884

    
1885
        if ((recvbuf[0] & 0xc0) != 0x80) {
1886
            av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
1887
                                      "received\n");
1888
            continue;
1889
        }
1890

    
1891
        payload_type = recvbuf[1] & 0x7f;
1892
        break;
1893
    }
1894
    getsockname(url_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
1895
    url_close(in);
1896
    in = NULL;
1897

    
1898
    memset(&codec, 0, sizeof(codec));
1899
    if (ff_rtp_get_codec_info(&codec, payload_type)) {
1900
        av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
1901
                                "without an SDP file describing it\n",
1902
                                 payload_type);
1903
        goto fail;
1904
    }
1905
    if (codec.codec_type != AVMEDIA_TYPE_DATA) {
1906
        av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
1907
                                  "properly you need an SDP file "
1908
                                  "describing it\n");
1909
    }
1910

    
1911
    av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
1912
                 NULL, 0, s->filename);
1913

    
1914
    snprintf(sdp, sizeof(sdp),
1915
             "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
1916
             addr.ss_family == AF_INET ? 4 : 6, host,
1917
             codec.codec_type == AVMEDIA_TYPE_DATA  ? "application" :
1918
             codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
1919
             port, payload_type);
1920
    av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
1921

    
1922
    init_put_byte(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
1923
    s->pb = &pb;
1924

    
1925
    /* sdp_read_header initializes this again */
1926
    ff_network_close();
1927

    
1928
    ret = sdp_read_header(s, ap);
1929
    s->pb = NULL;
1930
    return ret;
1931

    
1932
fail:
1933
    if (in)
1934
        url_close(in);
1935
    ff_network_close();
1936
    return ret;
1937
}
1938

    
1939
AVInputFormat ff_rtp_demuxer = {
1940
    "rtp",
1941
    NULL_IF_CONFIG_SMALL("RTP input format"),
1942
    sizeof(RTSPState),
1943
    rtp_probe,
1944
    rtp_read_header,
1945
    ff_rtsp_fetch_packet,
1946
    sdp_read_close,
1947
    .flags = AVFMT_NOFILE,
1948
};
1949
#endif /* CONFIG_RTP_DEMUXER */
1950