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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_SYS_SELECT_H
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#include <sys/select.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 select, in ms,
48
 * and read_packet(), in seconds  */
49
#define SELECT_TIMEOUT_MS 100
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#define READ_PACKET_TIMEOUT_S 10
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#define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / SELECT_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
    dprintf(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
int ff_sdp_parse(AVFormatContext *s, const char *content)
433
{
434
    const char *p;
435
    int letter;
436
    /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
437
     * contain long SDP lines containing complete ASF Headers (several
438
     * kB) or arrays of MDPR (RM stream descriptor) headers plus
439
     * "rulebooks" describing their properties. Therefore, the SDP line
440
     * buffer is large.
441
     *
442
     * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
443
     * in rtpdec_xiph.c. */
444
    char buf[16384], *q;
445
    SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
446

    
447
    memset(s1, 0, sizeof(SDPParseState));
448
    p = content;
449
    for (;;) {
450
        p += strspn(p, SPACE_CHARS);
451
        letter = *p;
452
        if (letter == '\0')
453
            break;
454
        p++;
455
        if (*p != '=')
456
            goto next_line;
457
        p++;
458
        /* get the content */
459
        q = buf;
460
        while (*p != '\n' && *p != '\r' && *p != '\0') {
461
            if ((q - buf) < sizeof(buf) - 1)
462
                *q++ = *p;
463
            p++;
464
        }
465
        *q = '\0';
466
        sdp_parse_line(s, s1, letter, buf);
467
    next_line:
468
        while (*p != '\n' && *p != '\0')
469
            p++;
470
        if (*p == '\n')
471
            p++;
472
    }
473
    return 0;
474
}
475
#endif /* CONFIG_RTPDEC */
476

    
477
/* close and free RTSP streams */
478
void ff_rtsp_close_streams(AVFormatContext *s)
479
{
480
    RTSPState *rt = s->priv_data;
481
    int i;
482
    RTSPStream *rtsp_st;
483

    
484
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
485
        rtsp_st = rt->rtsp_streams[i];
486
        if (rtsp_st) {
487
            if (rtsp_st->transport_priv) {
488
                if (s->oformat) {
489
                    AVFormatContext *rtpctx = rtsp_st->transport_priv;
490
                    av_write_trailer(rtpctx);
491
                    if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
492
                        uint8_t *ptr;
493
                        url_close_dyn_buf(rtpctx->pb, &ptr);
494
                        av_free(ptr);
495
                    } else {
496
                        url_fclose(rtpctx->pb);
497
                    }
498
                    av_metadata_free(&rtpctx->streams[0]->metadata);
499
                    av_metadata_free(&rtpctx->metadata);
500
                    av_free(rtpctx->streams[0]);
501
                    av_free(rtpctx);
502
                } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
503
                    ff_rdt_parse_close(rtsp_st->transport_priv);
504
                else if (CONFIG_RTPDEC)
505
                    rtp_parse_close(rtsp_st->transport_priv);
506
            }
507
            if (rtsp_st->rtp_handle)
508
                url_close(rtsp_st->rtp_handle);
509
            if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
510
                rtsp_st->dynamic_handler->close(
511
                    rtsp_st->dynamic_protocol_context);
512
        }
513
    }
514
    av_free(rt->rtsp_streams);
515
    if (rt->asf_ctx) {
516
        av_close_input_stream (rt->asf_ctx);
517
        rt->asf_ctx = NULL;
518
    }
519
    av_free(rt->recvbuf);
520
}
521

    
522
static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
523
{
524
    RTSPState *rt = s->priv_data;
525
    AVStream *st = NULL;
526

    
527
    /* open the RTP context */
528
    if (rtsp_st->stream_index >= 0)
529
        st = s->streams[rtsp_st->stream_index];
530
    if (!st)
531
        s->ctx_flags |= AVFMTCTX_NOHEADER;
532

    
533
    if (s->oformat && CONFIG_RTSP_MUXER) {
534
        rtsp_st->transport_priv = ff_rtp_chain_mux_open(s, st,
535
                                      rtsp_st->rtp_handle,
536
                                      RTSP_TCP_MAX_PACKET_SIZE);
537
        /* Ownership of rtp_handle is passed to the rtp mux context */
538
        rtsp_st->rtp_handle = NULL;
539
    } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
540
        rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
541
                                            rtsp_st->dynamic_protocol_context,
542
                                            rtsp_st->dynamic_handler);
543
    else if (CONFIG_RTPDEC)
544
        rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
545
                                         rtsp_st->sdp_payload_type,
546
            (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
547
            ? 0 : RTP_REORDER_QUEUE_DEFAULT_SIZE);
548

    
549
    if (!rtsp_st->transport_priv) {
550
         return AVERROR(ENOMEM);
551
    } else if (rt->transport != RTSP_TRANSPORT_RDT && CONFIG_RTPDEC) {
552
        if (rtsp_st->dynamic_handler) {
553
            rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
554
                                           rtsp_st->dynamic_protocol_context,
555
                                           rtsp_st->dynamic_handler);
556
        }
557
    }
558

    
559
    return 0;
560
}
561

    
562
#if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
563
static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
564
{
565
    const char *p;
566
    int v;
567

    
568
    p = *pp;
569
    p += strspn(p, SPACE_CHARS);
570
    v = strtol(p, (char **)&p, 10);
571
    if (*p == '-') {
572
        p++;
573
        *min_ptr = v;
574
        v = strtol(p, (char **)&p, 10);
575
        *max_ptr = v;
576
    } else {
577
        *min_ptr = v;
578
        *max_ptr = v;
579
    }
580
    *pp = p;
581
}
582

    
583
/* XXX: only one transport specification is parsed */
584
static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
585
{
586
    char transport_protocol[16];
587
    char profile[16];
588
    char lower_transport[16];
589
    char parameter[16];
590
    RTSPTransportField *th;
591
    char buf[256];
592

    
593
    reply->nb_transports = 0;
594

    
595
    for (;;) {
596
        p += strspn(p, SPACE_CHARS);
597
        if (*p == '\0')
598
            break;
599

    
600
        th = &reply->transports[reply->nb_transports];
601

    
602
        get_word_sep(transport_protocol, sizeof(transport_protocol),
603
                     "/", &p);
604
        if (!strcasecmp (transport_protocol, "rtp")) {
605
            get_word_sep(profile, sizeof(profile), "/;,", &p);
606
            lower_transport[0] = '\0';
607
            /* rtp/avp/<protocol> */
608
            if (*p == '/') {
609
                get_word_sep(lower_transport, sizeof(lower_transport),
610
                             ";,", &p);
611
            }
612
            th->transport = RTSP_TRANSPORT_RTP;
613
        } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
614
                   !strcasecmp (transport_protocol, "x-real-rdt")) {
615
            /* x-pn-tng/<protocol> */
616
            get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
617
            profile[0] = '\0';
618
            th->transport = RTSP_TRANSPORT_RDT;
619
        }
620
        if (!strcasecmp(lower_transport, "TCP"))
621
            th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
622
        else
623
            th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
624

    
625
        if (*p == ';')
626
            p++;
627
        /* get each parameter */
628
        while (*p != '\0' && *p != ',') {
629
            get_word_sep(parameter, sizeof(parameter), "=;,", &p);
630
            if (!strcmp(parameter, "port")) {
631
                if (*p == '=') {
632
                    p++;
633
                    rtsp_parse_range(&th->port_min, &th->port_max, &p);
634
                }
635
            } else if (!strcmp(parameter, "client_port")) {
636
                if (*p == '=') {
637
                    p++;
638
                    rtsp_parse_range(&th->client_port_min,
639
                                     &th->client_port_max, &p);
640
                }
641
            } else if (!strcmp(parameter, "server_port")) {
642
                if (*p == '=') {
643
                    p++;
644
                    rtsp_parse_range(&th->server_port_min,
645
                                     &th->server_port_max, &p);
646
                }
647
            } else if (!strcmp(parameter, "interleaved")) {
648
                if (*p == '=') {
649
                    p++;
650
                    rtsp_parse_range(&th->interleaved_min,
651
                                     &th->interleaved_max, &p);
652
                }
653
            } else if (!strcmp(parameter, "multicast")) {
654
                if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
655
                    th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
656
            } else if (!strcmp(parameter, "ttl")) {
657
                if (*p == '=') {
658
                    p++;
659
                    th->ttl = strtol(p, (char **)&p, 10);
660
                }
661
            } else if (!strcmp(parameter, "destination")) {
662
                if (*p == '=') {
663
                    p++;
664
                    get_word_sep(buf, sizeof(buf), ";,", &p);
665
                    get_sockaddr(buf, &th->destination);
666
                }
667
            } else if (!strcmp(parameter, "source")) {
668
                if (*p == '=') {
669
                    p++;
670
                    get_word_sep(buf, sizeof(buf), ";,", &p);
671
                    av_strlcpy(th->source, buf, sizeof(th->source));
672
                }
673
            }
674

    
675
            while (*p != ';' && *p != '\0' && *p != ',')
676
                p++;
677
            if (*p == ';')
678
                p++;
679
        }
680
        if (*p == ',')
681
            p++;
682

    
683
        reply->nb_transports++;
684
    }
685
}
686

    
687
static void handle_rtp_info(RTSPState *rt, const char *url,
688
                            uint32_t seq, uint32_t rtptime)
689
{
690
    int i;
691
    if (!rtptime || !url[0])
692
        return;
693
    if (rt->transport != RTSP_TRANSPORT_RTP)
694
        return;
695
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
696
        RTSPStream *rtsp_st = rt->rtsp_streams[i];
697
        RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
698
        if (!rtpctx)
699
            continue;
700
        if (!strcmp(rtsp_st->control_url, url)) {
701
            rtpctx->base_timestamp = rtptime;
702
            break;
703
        }
704
    }
705
}
706

    
707
static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
708
{
709
    int read = 0;
710
    char key[20], value[1024], url[1024] = "";
711
    uint32_t seq = 0, rtptime = 0;
712

    
713
    for (;;) {
714
        p += strspn(p, SPACE_CHARS);
715
        if (!*p)
716
            break;
717
        get_word_sep(key, sizeof(key), "=", &p);
718
        if (*p != '=')
719
            break;
720
        p++;
721
        get_word_sep(value, sizeof(value), ";, ", &p);
722
        read++;
723
        if (!strcmp(key, "url"))
724
            av_strlcpy(url, value, sizeof(url));
725
        else if (!strcmp(key, "seq"))
726
            seq = strtol(value, NULL, 10);
727
        else if (!strcmp(key, "rtptime"))
728
            rtptime = strtol(value, NULL, 10);
729
        if (*p == ',') {
730
            handle_rtp_info(rt, url, seq, rtptime);
731
            url[0] = '\0';
732
            seq = rtptime = 0;
733
            read = 0;
734
        }
735
        if (*p)
736
            p++;
737
    }
738
    if (read > 0)
739
        handle_rtp_info(rt, url, seq, rtptime);
740
}
741

    
742
void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
743
                        RTSPState *rt, const char *method)
744
{
745
    const char *p;
746

    
747
    /* NOTE: we do case independent match for broken servers */
748
    p = buf;
749
    if (av_stristart(p, "Session:", &p)) {
750
        int t;
751
        get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
752
        if (av_stristart(p, ";timeout=", &p) &&
753
            (t = strtol(p, NULL, 10)) > 0) {
754
            reply->timeout = t;
755
        }
756
    } else if (av_stristart(p, "Content-Length:", &p)) {
757
        reply->content_length = strtol(p, NULL, 10);
758
    } else if (av_stristart(p, "Transport:", &p)) {
759
        rtsp_parse_transport(reply, p);
760
    } else if (av_stristart(p, "CSeq:", &p)) {
761
        reply->seq = strtol(p, NULL, 10);
762
    } else if (av_stristart(p, "Range:", &p)) {
763
        rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
764
    } else if (av_stristart(p, "RealChallenge1:", &p)) {
765
        p += strspn(p, SPACE_CHARS);
766
        av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
767
    } else if (av_stristart(p, "Server:", &p)) {
768
        p += strspn(p, SPACE_CHARS);
769
        av_strlcpy(reply->server, p, sizeof(reply->server));
770
    } else if (av_stristart(p, "Notice:", &p) ||
771
               av_stristart(p, "X-Notice:", &p)) {
772
        reply->notice = strtol(p, NULL, 10);
773
    } else if (av_stristart(p, "Location:", &p)) {
774
        p += strspn(p, SPACE_CHARS);
775
        av_strlcpy(reply->location, p , sizeof(reply->location));
776
    } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
777
        p += strspn(p, SPACE_CHARS);
778
        ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
779
    } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
780
        p += strspn(p, SPACE_CHARS);
781
        ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
782
    } else if (av_stristart(p, "Content-Base:", &p) && rt) {
783
        p += strspn(p, SPACE_CHARS);
784
        if (method && !strcmp(method, "DESCRIBE"))
785
            av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
786
    } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
787
        p += strspn(p, SPACE_CHARS);
788
        if (method && !strcmp(method, "PLAY"))
789
            rtsp_parse_rtp_info(rt, p);
790
    }
791
}
792

    
793
/* skip a RTP/TCP interleaved packet */
794
void ff_rtsp_skip_packet(AVFormatContext *s)
795
{
796
    RTSPState *rt = s->priv_data;
797
    int ret, len, len1;
798
    uint8_t buf[1024];
799

    
800
    ret = url_read_complete(rt->rtsp_hd, buf, 3);
801
    if (ret != 3)
802
        return;
803
    len = AV_RB16(buf + 1);
804

    
805
    dprintf(s, "skipping RTP packet len=%d\n", len);
806

    
807
    /* skip payload */
808
    while (len > 0) {
809
        len1 = len;
810
        if (len1 > sizeof(buf))
811
            len1 = sizeof(buf);
812
        ret = url_read_complete(rt->rtsp_hd, buf, len1);
813
        if (ret != len1)
814
            return;
815
        len -= len1;
816
    }
817
}
818

    
819
int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
820
                       unsigned char **content_ptr,
821
                       int return_on_interleaved_data, const char *method)
822
{
823
    RTSPState *rt = s->priv_data;
824
    char buf[4096], buf1[1024], *q;
825
    unsigned char ch;
826
    const char *p;
827
    int ret, content_length, line_count = 0;
828
    unsigned char *content = NULL;
829

    
830
    memset(reply, 0, sizeof(*reply));
831

    
832
    /* parse reply (XXX: use buffers) */
833
    rt->last_reply[0] = '\0';
834
    for (;;) {
835
        q = buf;
836
        for (;;) {
837
            ret = url_read_complete(rt->rtsp_hd, &ch, 1);
838
#ifdef DEBUG_RTP_TCP
839
            dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
840
#endif
841
            if (ret != 1)
842
                return AVERROR_EOF;
843
            if (ch == '\n')
844
                break;
845
            if (ch == '$') {
846
                /* XXX: only parse it if first char on line ? */
847
                if (return_on_interleaved_data) {
848
                    return 1;
849
                } else
850
                    ff_rtsp_skip_packet(s);
851
            } else if (ch != '\r') {
852
                if ((q - buf) < sizeof(buf) - 1)
853
                    *q++ = ch;
854
            }
855
        }
856
        *q = '\0';
857

    
858
        dprintf(s, "line='%s'\n", buf);
859

    
860
        /* test if last line */
861
        if (buf[0] == '\0')
862
            break;
863
        p = buf;
864
        if (line_count == 0) {
865
            /* get reply code */
866
            get_word(buf1, sizeof(buf1), &p);
867
            get_word(buf1, sizeof(buf1), &p);
868
            reply->status_code = atoi(buf1);
869
            av_strlcpy(reply->reason, p, sizeof(reply->reason));
870
        } else {
871
            ff_rtsp_parse_line(reply, p, rt, method);
872
            av_strlcat(rt->last_reply, p,    sizeof(rt->last_reply));
873
            av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
874
        }
875
        line_count++;
876
    }
877

    
878
    if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
879
        av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
880

    
881
    content_length = reply->content_length;
882
    if (content_length > 0) {
883
        /* leave some room for a trailing '\0' (useful for simple parsing) */
884
        content = av_malloc(content_length + 1);
885
        (void)url_read_complete(rt->rtsp_hd, content, content_length);
886
        content[content_length] = '\0';
887
    }
888
    if (content_ptr)
889
        *content_ptr = content;
890
    else
891
        av_free(content);
892

    
893
    if (rt->seq != reply->seq) {
894
        av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
895
            rt->seq, reply->seq);
896
    }
897

    
898
    /* EOS */
899
    if (reply->notice == 2101 /* End-of-Stream Reached */      ||
900
        reply->notice == 2104 /* Start-of-Stream Reached */    ||
901
        reply->notice == 2306 /* Continuous Feed Terminated */) {
902
        rt->state = RTSP_STATE_IDLE;
903
    } else if (reply->notice >= 4400 && reply->notice < 5500) {
904
        return AVERROR(EIO); /* data or server error */
905
    } else if (reply->notice == 2401 /* Ticket Expired */ ||
906
             (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
907
        return AVERROR(EPERM);
908

    
909
    return 0;
910
}
911

    
912
int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
913
                                        const char *method, const char *url,
914
                                        const char *headers,
915
                                        const unsigned char *send_content,
916
                                        int send_content_length)
917
{
918
    RTSPState *rt = s->priv_data;
919
    char buf[4096], *out_buf;
920
    char base64buf[AV_BASE64_SIZE(sizeof(buf))];
921

    
922
    /* Add in RTSP headers */
923
    out_buf = buf;
924
    rt->seq++;
925
    snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
926
    if (headers)
927
        av_strlcat(buf, headers, sizeof(buf));
928
    av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
929
    if (rt->session_id[0] != '\0' && (!headers ||
930
        !strstr(headers, "\nIf-Match:"))) {
931
        av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
932
    }
933
    if (rt->auth[0]) {
934
        char *str = ff_http_auth_create_response(&rt->auth_state,
935
                                                 rt->auth, url, method);
936
        if (str)
937
            av_strlcat(buf, str, sizeof(buf));
938
        av_free(str);
939
    }
940
    if (send_content_length > 0 && send_content)
941
        av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
942
    av_strlcat(buf, "\r\n", sizeof(buf));
943

    
944
    /* base64 encode rtsp if tunneling */
945
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
946
        av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
947
        out_buf = base64buf;
948
    }
949

    
950
    dprintf(s, "Sending:\n%s--\n", buf);
951

    
952
    url_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
953
    if (send_content_length > 0 && send_content) {
954
        if (rt->control_transport == RTSP_MODE_TUNNEL) {
955
            av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
956
                                    "with content data not supported\n");
957
            return AVERROR_PATCHWELCOME;
958
        }
959
        url_write(rt->rtsp_hd_out, send_content, send_content_length);
960
    }
961
    rt->last_cmd_time = av_gettime();
962

    
963
    return 0;
964
}
965

    
966
int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
967
                           const char *url, const char *headers)
968
{
969
    return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
970
}
971

    
972
int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
973
                     const char *headers, RTSPMessageHeader *reply,
974
                     unsigned char **content_ptr)
975
{
976
    return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
977
                                         content_ptr, NULL, 0);
978
}
979

    
980
int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
981
                                  const char *method, const char *url,
982
                                  const char *header,
983
                                  RTSPMessageHeader *reply,
984
                                  unsigned char **content_ptr,
985
                                  const unsigned char *send_content,
986
                                  int send_content_length)
987
{
988
    RTSPState *rt = s->priv_data;
989
    HTTPAuthType cur_auth_type;
990
    int ret;
991

    
992
retry:
993
    cur_auth_type = rt->auth_state.auth_type;
994
    if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
995
                                                   send_content,
996
                                                   send_content_length)))
997
        return ret;
998

    
999
    if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1000
        return ret;
1001

    
1002
    if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
1003
        rt->auth_state.auth_type != HTTP_AUTH_NONE)
1004
        goto retry;
1005

    
1006
    if (reply->status_code > 400){
1007
        av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1008
               method,
1009
               reply->status_code,
1010
               reply->reason);
1011
        av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1012
    }
1013

    
1014
    return 0;
1015
}
1016

    
1017
/**
1018
 * @return 0 on success, <0 on error, 1 if protocol is unavailable.
1019
 */
1020
int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1021
                              int lower_transport, const char *real_challenge)
1022
{
1023
    RTSPState *rt = s->priv_data;
1024
    int rtx, j, i, err, interleave = 0;
1025
    RTSPStream *rtsp_st;
1026
    RTSPMessageHeader reply1, *reply = &reply1;
1027
    char cmd[2048];
1028
    const char *trans_pref;
1029

    
1030
    if (rt->transport == RTSP_TRANSPORT_RDT)
1031
        trans_pref = "x-pn-tng";
1032
    else
1033
        trans_pref = "RTP/AVP";
1034

    
1035
    /* default timeout: 1 minute */
1036
    rt->timeout = 60;
1037

    
1038
    /* for each stream, make the setup request */
1039
    /* XXX: we assume the same server is used for the control of each
1040
     * RTSP stream */
1041

    
1042
    for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1043
        char transport[2048];
1044

    
1045
        /**
1046
         * WMS serves all UDP data over a single connection, the RTX, which
1047
         * isn't necessarily the first in the SDP but has to be the first
1048
         * to be set up, else the second/third SETUP will fail with a 461.
1049
         */
1050
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1051
             rt->server_type == RTSP_SERVER_WMS) {
1052
            if (i == 0) {
1053
                /* rtx first */
1054
                for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1055
                    int len = strlen(rt->rtsp_streams[rtx]->control_url);
1056
                    if (len >= 4 &&
1057
                        !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1058
                                "/rtx"))
1059
                        break;
1060
                }
1061
                if (rtx == rt->nb_rtsp_streams)
1062
                    return -1; /* no RTX found */
1063
                rtsp_st = rt->rtsp_streams[rtx];
1064
            } else
1065
                rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1066
        } else
1067
            rtsp_st = rt->rtsp_streams[i];
1068

    
1069
        /* RTP/UDP */
1070
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1071
            char buf[256];
1072

    
1073
            if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1074
                port = reply->transports[0].client_port_min;
1075
                goto have_port;
1076
            }
1077

    
1078
            /* first try in specified port range */
1079
            if (RTSP_RTP_PORT_MIN != 0) {
1080
                while (j <= RTSP_RTP_PORT_MAX) {
1081
                    ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1082
                                "?localport=%d", j);
1083
                    /* we will use two ports per rtp stream (rtp and rtcp) */
1084
                    j += 2;
1085
                    if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1086
                        goto rtp_opened;
1087
                }
1088
            }
1089

    
1090
#if 0
1091
            /* then try on any port */
1092
            if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1093
                err = AVERROR_INVALIDDATA;
1094
                goto fail;
1095
            }
1096
#else
1097
            av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1098
            err = AVERROR(EIO);
1099
            goto fail;
1100
#endif
1101

    
1102
        rtp_opened:
1103
            port = rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1104
        have_port:
1105
            snprintf(transport, sizeof(transport) - 1,
1106
                     "%s/UDP;", trans_pref);
1107
            if (rt->server_type != RTSP_SERVER_REAL)
1108
                av_strlcat(transport, "unicast;", sizeof(transport));
1109
            av_strlcatf(transport, sizeof(transport),
1110
                     "client_port=%d", port);
1111
            if (rt->transport == RTSP_TRANSPORT_RTP &&
1112
                !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1113
                av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1114
        }
1115

    
1116
        /* RTP/TCP */
1117
        else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1118
            /** For WMS streams, the application streams are only used for
1119
             * UDP. When trying to set it up for TCP streams, the server
1120
             * will return an error. Therefore, we skip those streams. */
1121
            if (rt->server_type == RTSP_SERVER_WMS &&
1122
                s->streams[rtsp_st->stream_index]->codec->codec_type ==
1123
                    AVMEDIA_TYPE_DATA)
1124
                continue;
1125
            snprintf(transport, sizeof(transport) - 1,
1126
                     "%s/TCP;", trans_pref);
1127
            if (rt->server_type == RTSP_SERVER_WMS)
1128
                av_strlcat(transport, "unicast;", sizeof(transport));
1129
            av_strlcatf(transport, sizeof(transport),
1130
                        "interleaved=%d-%d",
1131
                        interleave, interleave + 1);
1132
            interleave += 2;
1133
        }
1134

    
1135
        else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1136
            snprintf(transport, sizeof(transport) - 1,
1137
                     "%s/UDP;multicast", trans_pref);
1138
        }
1139
        if (s->oformat) {
1140
            av_strlcat(transport, ";mode=receive", sizeof(transport));
1141
        } else if (rt->server_type == RTSP_SERVER_REAL ||
1142
                   rt->server_type == RTSP_SERVER_WMS)
1143
            av_strlcat(transport, ";mode=play", sizeof(transport));
1144
        snprintf(cmd, sizeof(cmd),
1145
                 "Transport: %s\r\n",
1146
                 transport);
1147
        if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1148
            char real_res[41], real_csum[9];
1149
            ff_rdt_calc_response_and_checksum(real_res, real_csum,
1150
                                              real_challenge);
1151
            av_strlcatf(cmd, sizeof(cmd),
1152
                        "If-Match: %s\r\n"
1153
                        "RealChallenge2: %s, sd=%s\r\n",
1154
                        rt->session_id, real_res, real_csum);
1155
        }
1156
        ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1157
        if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1158
            err = 1;
1159
            goto fail;
1160
        } else if (reply->status_code != RTSP_STATUS_OK ||
1161
                   reply->nb_transports != 1) {
1162
            err = AVERROR_INVALIDDATA;
1163
            goto fail;
1164
        }
1165

    
1166
        /* XXX: same protocol for all streams is required */
1167
        if (i > 0) {
1168
            if (reply->transports[0].lower_transport != rt->lower_transport ||
1169
                reply->transports[0].transport != rt->transport) {
1170
                err = AVERROR_INVALIDDATA;
1171
                goto fail;
1172
            }
1173
        } else {
1174
            rt->lower_transport = reply->transports[0].lower_transport;
1175
            rt->transport = reply->transports[0].transport;
1176
        }
1177

    
1178
        /* Fail if the server responded with another lower transport mode
1179
         * than what we requested. */
1180
        if (reply->transports[0].lower_transport != lower_transport) {
1181
            av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1182
            err = AVERROR_INVALIDDATA;
1183
            goto fail;
1184
        }
1185

    
1186
        switch(reply->transports[0].lower_transport) {
1187
        case RTSP_LOWER_TRANSPORT_TCP:
1188
            rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1189
            rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1190
            break;
1191

    
1192
        case RTSP_LOWER_TRANSPORT_UDP: {
1193
            char url[1024], options[30] = "";
1194

    
1195
            if (rt->filter_source)
1196
                av_strlcpy(options, "?connect=1", sizeof(options));
1197
            /* Use source address if specified */
1198
            if (reply->transports[0].source[0]) {
1199
                ff_url_join(url, sizeof(url), "rtp", NULL,
1200
                            reply->transports[0].source,
1201
                            reply->transports[0].server_port_min, options);
1202
            } else {
1203
                ff_url_join(url, sizeof(url), "rtp", NULL, host,
1204
                            reply->transports[0].server_port_min, options);
1205
            }
1206
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1207
                rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1208
                err = AVERROR_INVALIDDATA;
1209
                goto fail;
1210
            }
1211
            /* Try to initialize the connection state in a
1212
             * potential NAT router by sending dummy packets.
1213
             * RTP/RTCP dummy packets are used for RDT, too.
1214
             */
1215
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1216
                CONFIG_RTPDEC)
1217
                rtp_send_punch_packets(rtsp_st->rtp_handle);
1218
            break;
1219
        }
1220
        case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1221
            char url[1024], namebuf[50];
1222
            struct sockaddr_storage addr;
1223
            int port, ttl;
1224

    
1225
            if (reply->transports[0].destination.ss_family) {
1226
                addr      = reply->transports[0].destination;
1227
                port      = reply->transports[0].port_min;
1228
                ttl       = reply->transports[0].ttl;
1229
            } else {
1230
                addr      = rtsp_st->sdp_ip;
1231
                port      = rtsp_st->sdp_port;
1232
                ttl       = rtsp_st->sdp_ttl;
1233
            }
1234
            getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1235
                        namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1236
            ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1237
                        port, "?ttl=%d", ttl);
1238
            if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1239
                err = AVERROR_INVALIDDATA;
1240
                goto fail;
1241
            }
1242
            break;
1243
        }
1244
        }
1245

    
1246
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1247
            goto fail;
1248
    }
1249

    
1250
    if (reply->timeout > 0)
1251
        rt->timeout = reply->timeout;
1252

    
1253
    if (rt->server_type == RTSP_SERVER_REAL)
1254
        rt->need_subscription = 1;
1255

    
1256
    return 0;
1257

    
1258
fail:
1259
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
1260
        if (rt->rtsp_streams[i]->rtp_handle) {
1261
            url_close(rt->rtsp_streams[i]->rtp_handle);
1262
            rt->rtsp_streams[i]->rtp_handle = NULL;
1263
        }
1264
    }
1265
    return err;
1266
}
1267

    
1268
void ff_rtsp_close_connections(AVFormatContext *s)
1269
{
1270
    RTSPState *rt = s->priv_data;
1271
    if (rt->rtsp_hd_out != rt->rtsp_hd) url_close(rt->rtsp_hd_out);
1272
    url_close(rt->rtsp_hd);
1273
    rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1274
}
1275

    
1276
int ff_rtsp_connect(AVFormatContext *s)
1277
{
1278
    RTSPState *rt = s->priv_data;
1279
    char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1280
    char *option_list, *option, *filename;
1281
    int port, err, tcp_fd;
1282
    RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1283
    int lower_transport_mask = 0;
1284
    char real_challenge[64];
1285
    struct sockaddr_storage peer;
1286
    socklen_t peer_len = sizeof(peer);
1287

    
1288
    if (!ff_network_init())
1289
        return AVERROR(EIO);
1290
redirect:
1291
    rt->control_transport = RTSP_MODE_PLAIN;
1292
    /* extract hostname and port */
1293
    av_url_split(NULL, 0, auth, sizeof(auth),
1294
                 host, sizeof(host), &port, path, sizeof(path), s->filename);
1295
    if (*auth) {
1296
        av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1297
    }
1298
    if (port < 0)
1299
        port = RTSP_DEFAULT_PORT;
1300

    
1301
    /* search for options */
1302
    option_list = strrchr(path, '?');
1303
    if (option_list) {
1304
        /* Strip out the RTSP specific options, write out the rest of
1305
         * the options back into the same string. */
1306
        filename = option_list;
1307
        while (option_list) {
1308
            /* move the option pointer */
1309
            option = ++option_list;
1310
            option_list = strchr(option_list, '&');
1311
            if (option_list)
1312
                *option_list = 0;
1313

    
1314
            /* handle the options */
1315
            if (!strcmp(option, "udp")) {
1316
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
1317
            } else if (!strcmp(option, "multicast")) {
1318
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1319
            } else if (!strcmp(option, "tcp")) {
1320
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1321
            } else if(!strcmp(option, "http")) {
1322
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1323
                rt->control_transport = RTSP_MODE_TUNNEL;
1324
            } else if (!strcmp(option, "filter_src")) {
1325
                rt->filter_source = 1;
1326
            } else {
1327
                /* Write options back into the buffer, using memmove instead
1328
                 * of strcpy since the strings may overlap. */
1329
                int len = strlen(option);
1330
                memmove(++filename, option, len);
1331
                filename += len;
1332
                if (option_list) *filename = '&';
1333
            }
1334
        }
1335
        *filename = 0;
1336
    }
1337

    
1338
    if (!lower_transport_mask)
1339
        lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1340

    
1341
    if (s->oformat) {
1342
        /* Only UDP or TCP - UDP multicast isn't supported. */
1343
        lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1344
                                (1 << RTSP_LOWER_TRANSPORT_TCP);
1345
        if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1346
            av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1347
                                    "only UDP and TCP are supported for output.\n");
1348
            err = AVERROR(EINVAL);
1349
            goto fail;
1350
        }
1351
    }
1352

    
1353
    /* Construct the URI used in request; this is similar to s->filename,
1354
     * but with authentication credentials removed and RTSP specific options
1355
     * stripped out. */
1356
    ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1357
                host, port, "%s", path);
1358

    
1359
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
1360
        /* set up initial handshake for tunneling */
1361
        char httpname[1024];
1362
        char sessioncookie[17];
1363
        char headers[1024];
1364

    
1365
        ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1366
        snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1367
                 av_get_random_seed(), av_get_random_seed());
1368

    
1369
        /* GET requests */
1370
        if (url_alloc(&rt->rtsp_hd, httpname, URL_RDONLY) < 0) {
1371
            err = AVERROR(EIO);
1372
            goto fail;
1373
        }
1374

    
1375
        /* generate GET headers */
1376
        snprintf(headers, sizeof(headers),
1377
                 "x-sessioncookie: %s\r\n"
1378
                 "Accept: application/x-rtsp-tunnelled\r\n"
1379
                 "Pragma: no-cache\r\n"
1380
                 "Cache-Control: no-cache\r\n",
1381
                 sessioncookie);
1382
        ff_http_set_headers(rt->rtsp_hd, headers);
1383

    
1384
        /* complete the connection */
1385
        if (url_connect(rt->rtsp_hd)) {
1386
            err = AVERROR(EIO);
1387
            goto fail;
1388
        }
1389

    
1390
        /* POST requests */
1391
        if (url_alloc(&rt->rtsp_hd_out, httpname, URL_WRONLY) < 0 ) {
1392
            err = AVERROR(EIO);
1393
            goto fail;
1394
        }
1395

    
1396
        /* generate POST headers */
1397
        snprintf(headers, sizeof(headers),
1398
                 "x-sessioncookie: %s\r\n"
1399
                 "Content-Type: application/x-rtsp-tunnelled\r\n"
1400
                 "Pragma: no-cache\r\n"
1401
                 "Cache-Control: no-cache\r\n"
1402
                 "Content-Length: 32767\r\n"
1403
                 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1404
                 sessioncookie);
1405
        ff_http_set_headers(rt->rtsp_hd_out, headers);
1406
        ff_http_set_chunked_transfer_encoding(rt->rtsp_hd_out, 0);
1407

    
1408
        /* Initialize the authentication state for the POST session. The HTTP
1409
         * protocol implementation doesn't properly handle multi-pass
1410
         * authentication for POST requests, since it would require one of
1411
         * the following:
1412
         * - implementing Expect: 100-continue, which many HTTP servers
1413
         *   don't support anyway, even less the RTSP servers that do HTTP
1414
         *   tunneling
1415
         * - sending the whole POST data until getting a 401 reply specifying
1416
         *   what authentication method to use, then resending all that data
1417
         * - waiting for potential 401 replies directly after sending the
1418
         *   POST header (waiting for some unspecified time)
1419
         * Therefore, we copy the full auth state, which works for both basic
1420
         * and digest. (For digest, we would have to synchronize the nonce
1421
         * count variable between the two sessions, if we'd do more requests
1422
         * with the original session, though.)
1423
         */
1424
        ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1425

    
1426
        /* complete the connection */
1427
        if (url_connect(rt->rtsp_hd_out)) {
1428
            err = AVERROR(EIO);
1429
            goto fail;
1430
        }
1431
    } else {
1432
        /* open the tcp connection */
1433
        ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1434
        if (url_open(&rt->rtsp_hd, tcpname, URL_RDWR) < 0) {
1435
            err = AVERROR(EIO);
1436
            goto fail;
1437
        }
1438
        rt->rtsp_hd_out = rt->rtsp_hd;
1439
    }
1440
    rt->seq = 0;
1441

    
1442
    tcp_fd = url_get_file_handle(rt->rtsp_hd);
1443
    if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1444
        getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1445
                    NULL, 0, NI_NUMERICHOST);
1446
    }
1447

    
1448
    /* request options supported by the server; this also detects server
1449
     * type */
1450
    for (rt->server_type = RTSP_SERVER_RTP;;) {
1451
        cmd[0] = 0;
1452
        if (rt->server_type == RTSP_SERVER_REAL)
1453
            av_strlcat(cmd,
1454
                       /**
1455
                        * The following entries are required for proper
1456
                        * streaming from a Realmedia server. They are
1457
                        * interdependent in some way although we currently
1458
                        * don't quite understand how. Values were copied
1459
                        * from mplayer SVN r23589.
1460
                        * @param CompanyID is a 16-byte ID in base64
1461
                        * @param ClientChallenge is a 16-byte ID in hex
1462
                        */
1463
                       "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1464
                       "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1465
                       "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1466
                       "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1467
                       sizeof(cmd));
1468
        ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1469
        if (reply->status_code != RTSP_STATUS_OK) {
1470
            err = AVERROR_INVALIDDATA;
1471
            goto fail;
1472
        }
1473

    
1474
        /* detect server type if not standard-compliant RTP */
1475
        if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1476
            rt->server_type = RTSP_SERVER_REAL;
1477
            continue;
1478
        } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1479
            rt->server_type = RTSP_SERVER_WMS;
1480
        } else if (rt->server_type == RTSP_SERVER_REAL)
1481
            strcpy(real_challenge, reply->real_challenge);
1482
        break;
1483
    }
1484

    
1485
    if (s->iformat && CONFIG_RTSP_DEMUXER)
1486
        err = ff_rtsp_setup_input_streams(s, reply);
1487
    else if (CONFIG_RTSP_MUXER)
1488
        err = ff_rtsp_setup_output_streams(s, host);
1489
    if (err)
1490
        goto fail;
1491

    
1492
    do {
1493
        int lower_transport = ff_log2_tab[lower_transport_mask &
1494
                                  ~(lower_transport_mask - 1)];
1495

    
1496
        err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1497
                                 rt->server_type == RTSP_SERVER_REAL ?
1498
                                     real_challenge : NULL);
1499
        if (err < 0)
1500
            goto fail;
1501
        lower_transport_mask &= ~(1 << lower_transport);
1502
        if (lower_transport_mask == 0 && err == 1) {
1503
            err = FF_NETERROR(EPROTONOSUPPORT);
1504
            goto fail;
1505
        }
1506
    } while (err);
1507

    
1508
    rt->state = RTSP_STATE_IDLE;
1509
    rt->seek_timestamp = 0; /* default is to start stream at position zero */
1510
    return 0;
1511
 fail:
1512
    ff_rtsp_close_streams(s);
1513
    ff_rtsp_close_connections(s);
1514
    if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1515
        av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1516
        av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1517
               reply->status_code,
1518
               s->filename);
1519
        goto redirect;
1520
    }
1521
    ff_network_close();
1522
    return err;
1523
}
1524
#endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1525

    
1526
#if CONFIG_RTPDEC
1527
static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1528
                           uint8_t *buf, int buf_size, int64_t wait_end)
1529
{
1530
    RTSPState *rt = s->priv_data;
1531
    RTSPStream *rtsp_st;
1532
    fd_set rfds;
1533
    int fd, fd_rtcp, fd_max, n, i, ret, tcp_fd, timeout_cnt = 0;
1534
    struct timeval tv;
1535

    
1536
    for (;;) {
1537
        if (url_interrupt_cb())
1538
            return AVERROR(EINTR);
1539
        if (wait_end && wait_end - av_gettime() < 0)
1540
            return AVERROR(EAGAIN);
1541
        FD_ZERO(&rfds);
1542
        if (rt->rtsp_hd) {
1543
            tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1544
            FD_SET(tcp_fd, &rfds);
1545
        } else {
1546
            fd_max = 0;
1547
            tcp_fd = -1;
1548
        }
1549
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1550
            rtsp_st = rt->rtsp_streams[i];
1551
            if (rtsp_st->rtp_handle) {
1552
                fd = url_get_file_handle(rtsp_st->rtp_handle);
1553
                fd_rtcp = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1554
                if (FFMAX(fd, fd_rtcp) > fd_max)
1555
                    fd_max = FFMAX(fd, fd_rtcp);
1556
                FD_SET(fd, &rfds);
1557
                FD_SET(fd_rtcp, &rfds);
1558
            }
1559
        }
1560
        tv.tv_sec = 0;
1561
        tv.tv_usec = SELECT_TIMEOUT_MS * 1000;
1562
        n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1563
        if (n > 0) {
1564
            timeout_cnt = 0;
1565
            for (i = 0; i < rt->nb_rtsp_streams; i++) {
1566
                rtsp_st = rt->rtsp_streams[i];
1567
                if (rtsp_st->rtp_handle) {
1568
                    fd = url_get_file_handle(rtsp_st->rtp_handle);
1569
                    fd_rtcp = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1570
                    if (FD_ISSET(fd_rtcp, &rfds) || FD_ISSET(fd, &rfds)) {
1571
                        ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1572
                        if (ret > 0) {
1573
                            *prtsp_st = rtsp_st;
1574
                            return ret;
1575
                        }
1576
                    }
1577
                }
1578
            }
1579
#if CONFIG_RTSP_DEMUXER
1580
            if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
1581
                RTSPMessageHeader reply;
1582

    
1583
                ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1584
                if (ret < 0)
1585
                    return ret;
1586
                /* XXX: parse message */
1587
                if (rt->state != RTSP_STATE_STREAMING)
1588
                    return 0;
1589
            }
1590
#endif
1591
        } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1592
            return FF_NETERROR(ETIMEDOUT);
1593
        } else if (n < 0 && errno != EINTR)
1594
            return AVERROR(errno);
1595
    }
1596
}
1597

    
1598
int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1599
{
1600
    RTSPState *rt = s->priv_data;
1601
    int ret, len;
1602
    RTSPStream *rtsp_st, *first_queue_st = NULL;
1603
    int64_t wait_end = 0;
1604

    
1605
    if (rt->nb_byes == rt->nb_rtsp_streams)
1606
        return AVERROR_EOF;
1607

    
1608
    /* get next frames from the same RTP packet */
1609
    if (rt->cur_transport_priv) {
1610
        if (rt->transport == RTSP_TRANSPORT_RDT) {
1611
            ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1612
        } else
1613
            ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1614
        if (ret == 0) {
1615
            rt->cur_transport_priv = NULL;
1616
            return 0;
1617
        } else if (ret == 1) {
1618
            return 0;
1619
        } else
1620
            rt->cur_transport_priv = NULL;
1621
    }
1622

    
1623
    if (rt->transport == RTSP_TRANSPORT_RTP) {
1624
        int i;
1625
        int64_t first_queue_time = 0;
1626
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1627
            RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1628
            int64_t queue_time;
1629
            if (!rtpctx)
1630
                continue;
1631
            queue_time = ff_rtp_queued_packet_time(rtpctx);
1632
            if (queue_time && (queue_time - first_queue_time < 0 ||
1633
                               !first_queue_time)) {
1634
                first_queue_time = queue_time;
1635
                first_queue_st   = rt->rtsp_streams[i];
1636
            }
1637
        }
1638
        if (first_queue_time)
1639
            wait_end = first_queue_time + s->max_delay;
1640
    }
1641

    
1642
    /* read next RTP packet */
1643
 redo:
1644
    if (!rt->recvbuf) {
1645
        rt->recvbuf = av_malloc(RECVBUF_SIZE);
1646
        if (!rt->recvbuf)
1647
            return AVERROR(ENOMEM);
1648
    }
1649

    
1650
    switch(rt->lower_transport) {
1651
    default:
1652
#if CONFIG_RTSP_DEMUXER
1653
    case RTSP_LOWER_TRANSPORT_TCP:
1654
        len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
1655
        break;
1656
#endif
1657
    case RTSP_LOWER_TRANSPORT_UDP:
1658
    case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1659
        len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
1660
        if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1661
            rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1662
        break;
1663
    }
1664
    if (len == AVERROR(EAGAIN) && first_queue_st &&
1665
        rt->transport == RTSP_TRANSPORT_RTP) {
1666
        rtsp_st = first_queue_st;
1667
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
1668
        goto end;
1669
    }
1670
    if (len < 0)
1671
        return len;
1672
    if (len == 0)
1673
        return AVERROR_EOF;
1674
    if (rt->transport == RTSP_TRANSPORT_RDT) {
1675
        ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1676
    } else {
1677
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1678
        if (ret < 0) {
1679
            /* Either bad packet, or a RTCP packet. Check if the
1680
             * first_rtcp_ntp_time field was initialized. */
1681
            RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1682
            if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1683
                /* first_rtcp_ntp_time has been initialized for this stream,
1684
                 * copy the same value to all other uninitialized streams,
1685
                 * in order to map their timestamp origin to the same ntp time
1686
                 * as this one. */
1687
                int i;
1688
                AVStream *st = NULL;
1689
                if (rtsp_st->stream_index >= 0)
1690
                    st = s->streams[rtsp_st->stream_index];
1691
                for (i = 0; i < rt->nb_rtsp_streams; i++) {
1692
                    RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
1693
                    AVStream *st2 = NULL;
1694
                    if (rt->rtsp_streams[i]->stream_index >= 0)
1695
                        st2 = s->streams[rt->rtsp_streams[i]->stream_index];
1696
                    if (rtpctx2 && st && st2 &&
1697
                        rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
1698
                        rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1699
                        rtpctx2->rtcp_ts_offset = av_rescale_q(
1700
                            rtpctx->rtcp_ts_offset, st->time_base,
1701
                            st2->time_base);
1702
                    }
1703
                }
1704
            }
1705
            if (ret == -RTCP_BYE) {
1706
                rt->nb_byes++;
1707

    
1708
                av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1709
                       rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1710

    
1711
                if (rt->nb_byes == rt->nb_rtsp_streams)
1712
                    return AVERROR_EOF;
1713
            }
1714
        }
1715
    }
1716
end:
1717
    if (ret < 0)
1718
        goto redo;
1719
    if (ret == 1)
1720
        /* more packets may follow, so we save the RTP context */
1721
        rt->cur_transport_priv = rtsp_st->transport_priv;
1722

    
1723
    return ret;
1724
}
1725
#endif /* CONFIG_RTPDEC */
1726

    
1727
#if CONFIG_SDP_DEMUXER
1728
static int sdp_probe(AVProbeData *p1)
1729
{
1730
    const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1731

    
1732
    /* we look for a line beginning "c=IN IP" */
1733
    while (p < p_end && *p != '\0') {
1734
        if (p + sizeof("c=IN IP") - 1 < p_end &&
1735
            av_strstart(p, "c=IN IP", NULL))
1736
            return AVPROBE_SCORE_MAX / 2;
1737

    
1738
        while (p < p_end - 1 && *p != '\n') p++;
1739
        if (++p >= p_end)
1740
            break;
1741
        if (*p == '\r')
1742
            p++;
1743
    }
1744
    return 0;
1745
}
1746

    
1747
static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1748
{
1749
    RTSPState *rt = s->priv_data;
1750
    RTSPStream *rtsp_st;
1751
    int size, i, err;
1752
    char *content;
1753
    char url[1024];
1754

    
1755
    if (!ff_network_init())
1756
        return AVERROR(EIO);
1757

    
1758
    /* read the whole sdp file */
1759
    /* XXX: better loading */
1760
    content = av_malloc(SDP_MAX_SIZE);
1761
    size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1762
    if (size <= 0) {
1763
        av_free(content);
1764
        return AVERROR_INVALIDDATA;
1765
    }
1766
    content[size] ='\0';
1767

    
1768
    ff_sdp_parse(s, content);
1769
    av_free(content);
1770

    
1771
    /* open each RTP stream */
1772
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
1773
        char namebuf[50];
1774
        rtsp_st = rt->rtsp_streams[i];
1775

    
1776
        getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
1777
                    namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1778
        ff_url_join(url, sizeof(url), "rtp", NULL,
1779
                    namebuf, rtsp_st->sdp_port,
1780
                    "?localport=%d&ttl=%d", rtsp_st->sdp_port,
1781
                    rtsp_st->sdp_ttl);
1782
        if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1783
            err = AVERROR_INVALIDDATA;
1784
            goto fail;
1785
        }
1786
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1787
            goto fail;
1788
    }
1789
    return 0;
1790
fail:
1791
    ff_rtsp_close_streams(s);
1792
    ff_network_close();
1793
    return err;
1794
}
1795

    
1796
static int sdp_read_close(AVFormatContext *s)
1797
{
1798
    ff_rtsp_close_streams(s);
1799
    ff_network_close();
1800
    return 0;
1801
}
1802

    
1803
AVInputFormat sdp_demuxer = {
1804
    "sdp",
1805
    NULL_IF_CONFIG_SMALL("SDP"),
1806
    sizeof(RTSPState),
1807
    sdp_probe,
1808
    sdp_read_header,
1809
    ff_rtsp_fetch_packet,
1810
    sdp_read_close,
1811
};
1812
#endif /* CONFIG_SDP_DEMUXER */
1813

    
1814
#if CONFIG_RTP_DEMUXER
1815
static int rtp_probe(AVProbeData *p)
1816
{
1817
    if (av_strstart(p->filename, "rtp:", NULL))
1818
        return AVPROBE_SCORE_MAX;
1819
    return 0;
1820
}
1821

    
1822
static int rtp_read_header(AVFormatContext *s,
1823
                           AVFormatParameters *ap)
1824
{
1825
    uint8_t recvbuf[1500];
1826
    char host[500], sdp[500];
1827
    int ret, port;
1828
    URLContext* in = NULL;
1829
    int payload_type;
1830
    AVCodecContext codec;
1831
    struct sockaddr_storage addr;
1832
    ByteIOContext pb;
1833
    socklen_t addrlen = sizeof(addr);
1834

    
1835
    if (!ff_network_init())
1836
        return AVERROR(EIO);
1837

    
1838
    ret = url_open(&in, s->filename, URL_RDONLY);
1839
    if (ret)
1840
        goto fail;
1841

    
1842
    while (1) {
1843
        ret = url_read(in, recvbuf, sizeof(recvbuf));
1844
        if (ret == AVERROR(EAGAIN))
1845
            continue;
1846
        if (ret < 0)
1847
            goto fail;
1848
        if (ret < 12) {
1849
            av_log(s, AV_LOG_WARNING, "Received too short packet\n");
1850
            continue;
1851
        }
1852

    
1853
        if ((recvbuf[0] & 0xc0) != 0x80) {
1854
            av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
1855
                                      "received\n");
1856
            continue;
1857
        }
1858

    
1859
        payload_type = recvbuf[1] & 0x7f;
1860
        break;
1861
    }
1862
    getsockname(url_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
1863
    url_close(in);
1864
    in = NULL;
1865

    
1866
    memset(&codec, 0, sizeof(codec));
1867
    if (ff_rtp_get_codec_info(&codec, payload_type)) {
1868
        av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
1869
                                "without an SDP file describing it\n",
1870
                                 payload_type);
1871
        goto fail;
1872
    }
1873
    if (codec.codec_type != AVMEDIA_TYPE_DATA) {
1874
        av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
1875
                                  "properly you need an SDP file "
1876
                                  "describing it\n");
1877
    }
1878

    
1879
    av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
1880
                 NULL, 0, s->filename);
1881

    
1882
    snprintf(sdp, sizeof(sdp),
1883
             "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
1884
             addr.ss_family == AF_INET ? 4 : 6, host,
1885
             codec.codec_type == AVMEDIA_TYPE_DATA  ? "application" :
1886
             codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
1887
             port, payload_type);
1888
    av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
1889

    
1890
    init_put_byte(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
1891
    s->pb = &pb;
1892

    
1893
    /* sdp_read_header initializes this again */
1894
    ff_network_close();
1895

    
1896
    ret = sdp_read_header(s, ap);
1897
    s->pb = NULL;
1898
    return ret;
1899

    
1900
fail:
1901
    if (in)
1902
        url_close(in);
1903
    ff_network_close();
1904
    return ret;
1905
}
1906

    
1907
AVInputFormat rtp_demuxer = {
1908
    "rtp",
1909
    NULL_IF_CONFIG_SMALL("RTP input format"),
1910
    sizeof(RTSPState),
1911
    rtp_probe,
1912
    rtp_read_header,
1913
    ff_rtsp_fetch_packet,
1914
    sdp_read_close,
1915
    .flags = AVFMT_NOFILE,
1916
};
1917
#endif /* CONFIG_RTP_DEMUXER */
1918