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ffmpeg / libavformat / rtsp.c @ a92c30d7

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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
20
 */
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>
29
#if HAVE_SYS_SELECT_H
30
#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
50
#define READ_PACKET_TIMEOUT_S 10
51
#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
static int 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
#endif
1097

    
1098
        rtp_opened:
1099
            port = rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1100
        have_port:
1101
            snprintf(transport, sizeof(transport) - 1,
1102
                     "%s/UDP;", trans_pref);
1103
            if (rt->server_type != RTSP_SERVER_REAL)
1104
                av_strlcat(transport, "unicast;", sizeof(transport));
1105
            av_strlcatf(transport, sizeof(transport),
1106
                     "client_port=%d", port);
1107
            if (rt->transport == RTSP_TRANSPORT_RTP &&
1108
                !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1109
                av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1110
        }
1111

    
1112
        /* RTP/TCP */
1113
        else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1114
            /** For WMS streams, the application streams are only used for
1115
             * UDP. When trying to set it up for TCP streams, the server
1116
             * will return an error. Therefore, we skip those streams. */
1117
            if (rt->server_type == RTSP_SERVER_WMS &&
1118
                s->streams[rtsp_st->stream_index]->codec->codec_type ==
1119
                    AVMEDIA_TYPE_DATA)
1120
                continue;
1121
            snprintf(transport, sizeof(transport) - 1,
1122
                     "%s/TCP;", trans_pref);
1123
            if (rt->server_type == RTSP_SERVER_WMS)
1124
                av_strlcat(transport, "unicast;", sizeof(transport));
1125
            av_strlcatf(transport, sizeof(transport),
1126
                        "interleaved=%d-%d",
1127
                        interleave, interleave + 1);
1128
            interleave += 2;
1129
        }
1130

    
1131
        else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1132
            snprintf(transport, sizeof(transport) - 1,
1133
                     "%s/UDP;multicast", trans_pref);
1134
        }
1135
        if (s->oformat) {
1136
            av_strlcat(transport, ";mode=receive", sizeof(transport));
1137
        } else if (rt->server_type == RTSP_SERVER_REAL ||
1138
                   rt->server_type == RTSP_SERVER_WMS)
1139
            av_strlcat(transport, ";mode=play", sizeof(transport));
1140
        snprintf(cmd, sizeof(cmd),
1141
                 "Transport: %s\r\n",
1142
                 transport);
1143
        if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1144
            char real_res[41], real_csum[9];
1145
            ff_rdt_calc_response_and_checksum(real_res, real_csum,
1146
                                              real_challenge);
1147
            av_strlcatf(cmd, sizeof(cmd),
1148
                        "If-Match: %s\r\n"
1149
                        "RealChallenge2: %s, sd=%s\r\n",
1150
                        rt->session_id, real_res, real_csum);
1151
        }
1152
        ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1153
        if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1154
            err = 1;
1155
            goto fail;
1156
        } else if (reply->status_code != RTSP_STATUS_OK ||
1157
                   reply->nb_transports != 1) {
1158
            err = AVERROR_INVALIDDATA;
1159
            goto fail;
1160
        }
1161

    
1162
        /* XXX: same protocol for all streams is required */
1163
        if (i > 0) {
1164
            if (reply->transports[0].lower_transport != rt->lower_transport ||
1165
                reply->transports[0].transport != rt->transport) {
1166
                err = AVERROR_INVALIDDATA;
1167
                goto fail;
1168
            }
1169
        } else {
1170
            rt->lower_transport = reply->transports[0].lower_transport;
1171
            rt->transport = reply->transports[0].transport;
1172
        }
1173

    
1174
        /* Fail if the server responded with another lower transport mode
1175
         * than what we requested. */
1176
        if (reply->transports[0].lower_transport != lower_transport) {
1177
            av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1178
            err = AVERROR_INVALIDDATA;
1179
            goto fail;
1180
        }
1181

    
1182
        switch(reply->transports[0].lower_transport) {
1183
        case RTSP_LOWER_TRANSPORT_TCP:
1184
            rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1185
            rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1186
            break;
1187

    
1188
        case RTSP_LOWER_TRANSPORT_UDP: {
1189
            char url[1024], options[30] = "";
1190

    
1191
            if (rt->filter_source)
1192
                av_strlcpy(options, "?connect=1", sizeof(options));
1193
            /* Use source address if specified */
1194
            if (reply->transports[0].source[0]) {
1195
                ff_url_join(url, sizeof(url), "rtp", NULL,
1196
                            reply->transports[0].source,
1197
                            reply->transports[0].server_port_min, options);
1198
            } else {
1199
                ff_url_join(url, sizeof(url), "rtp", NULL, host,
1200
                            reply->transports[0].server_port_min, options);
1201
            }
1202
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1203
                rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1204
                err = AVERROR_INVALIDDATA;
1205
                goto fail;
1206
            }
1207
            /* Try to initialize the connection state in a
1208
             * potential NAT router by sending dummy packets.
1209
             * RTP/RTCP dummy packets are used for RDT, too.
1210
             */
1211
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1212
                CONFIG_RTPDEC)
1213
                rtp_send_punch_packets(rtsp_st->rtp_handle);
1214
            break;
1215
        }
1216
        case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1217
            char url[1024], namebuf[50];
1218
            struct sockaddr_storage addr;
1219
            int port, ttl;
1220

    
1221
            if (reply->transports[0].destination.ss_family) {
1222
                addr      = reply->transports[0].destination;
1223
                port      = reply->transports[0].port_min;
1224
                ttl       = reply->transports[0].ttl;
1225
            } else {
1226
                addr      = rtsp_st->sdp_ip;
1227
                port      = rtsp_st->sdp_port;
1228
                ttl       = rtsp_st->sdp_ttl;
1229
            }
1230
            getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1231
                        namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1232
            ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1233
                        port, "?ttl=%d", ttl);
1234
            if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1235
                err = AVERROR_INVALIDDATA;
1236
                goto fail;
1237
            }
1238
            break;
1239
        }
1240
        }
1241

    
1242
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1243
            goto fail;
1244
    }
1245

    
1246
    if (reply->timeout > 0)
1247
        rt->timeout = reply->timeout;
1248

    
1249
    if (rt->server_type == RTSP_SERVER_REAL)
1250
        rt->need_subscription = 1;
1251

    
1252
    return 0;
1253

    
1254
fail:
1255
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
1256
        if (rt->rtsp_streams[i]->rtp_handle) {
1257
            url_close(rt->rtsp_streams[i]->rtp_handle);
1258
            rt->rtsp_streams[i]->rtp_handle = NULL;
1259
        }
1260
    }
1261
    return err;
1262
}
1263

    
1264
void ff_rtsp_close_connections(AVFormatContext *s)
1265
{
1266
    RTSPState *rt = s->priv_data;
1267
    if (rt->rtsp_hd_out != rt->rtsp_hd) url_close(rt->rtsp_hd_out);
1268
    url_close(rt->rtsp_hd);
1269
    rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1270
}
1271

    
1272
int ff_rtsp_connect(AVFormatContext *s)
1273
{
1274
    RTSPState *rt = s->priv_data;
1275
    char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1276
    char *option_list, *option, *filename;
1277
    int port, err, tcp_fd;
1278
    RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1279
    int lower_transport_mask = 0;
1280
    char real_challenge[64];
1281
    struct sockaddr_storage peer;
1282
    socklen_t peer_len = sizeof(peer);
1283

    
1284
    if (!ff_network_init())
1285
        return AVERROR(EIO);
1286
redirect:
1287
    rt->control_transport = RTSP_MODE_PLAIN;
1288
    /* extract hostname and port */
1289
    av_url_split(NULL, 0, auth, sizeof(auth),
1290
                 host, sizeof(host), &port, path, sizeof(path), s->filename);
1291
    if (*auth) {
1292
        av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1293
    }
1294
    if (port < 0)
1295
        port = RTSP_DEFAULT_PORT;
1296

    
1297
    /* search for options */
1298
    option_list = strrchr(path, '?');
1299
    if (option_list) {
1300
        /* Strip out the RTSP specific options, write out the rest of
1301
         * the options back into the same string. */
1302
        filename = option_list;
1303
        while (option_list) {
1304
            /* move the option pointer */
1305
            option = ++option_list;
1306
            option_list = strchr(option_list, '&');
1307
            if (option_list)
1308
                *option_list = 0;
1309

    
1310
            /* handle the options */
1311
            if (!strcmp(option, "udp")) {
1312
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
1313
            } else if (!strcmp(option, "multicast")) {
1314
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1315
            } else if (!strcmp(option, "tcp")) {
1316
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1317
            } else if(!strcmp(option, "http")) {
1318
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1319
                rt->control_transport = RTSP_MODE_TUNNEL;
1320
            } else if (!strcmp(option, "filter_src")) {
1321
                rt->filter_source = 1;
1322
            } else {
1323
                /* Write options back into the buffer, using memmove instead
1324
                 * of strcpy since the strings may overlap. */
1325
                int len = strlen(option);
1326
                memmove(++filename, option, len);
1327
                filename += len;
1328
                if (option_list) *filename = '&';
1329
            }
1330
        }
1331
        *filename = 0;
1332
    }
1333

    
1334
    if (!lower_transport_mask)
1335
        lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1336

    
1337
    if (s->oformat) {
1338
        /* Only UDP or TCP - UDP multicast isn't supported. */
1339
        lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1340
                                (1 << RTSP_LOWER_TRANSPORT_TCP);
1341
        if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1342
            av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1343
                                    "only UDP and TCP are supported for output.\n");
1344
            err = AVERROR(EINVAL);
1345
            goto fail;
1346
        }
1347
    }
1348

    
1349
    /* Construct the URI used in request; this is similar to s->filename,
1350
     * but with authentication credentials removed and RTSP specific options
1351
     * stripped out. */
1352
    ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1353
                host, port, "%s", path);
1354

    
1355
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
1356
        /* set up initial handshake for tunneling */
1357
        char httpname[1024];
1358
        char sessioncookie[17];
1359
        char headers[1024];
1360

    
1361
        ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1362
        snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1363
                 av_get_random_seed(), av_get_random_seed());
1364

    
1365
        /* GET requests */
1366
        if (url_alloc(&rt->rtsp_hd, httpname, URL_RDONLY) < 0) {
1367
            err = AVERROR(EIO);
1368
            goto fail;
1369
        }
1370

    
1371
        /* generate GET headers */
1372
        snprintf(headers, sizeof(headers),
1373
                 "x-sessioncookie: %s\r\n"
1374
                 "Accept: application/x-rtsp-tunnelled\r\n"
1375
                 "Pragma: no-cache\r\n"
1376
                 "Cache-Control: no-cache\r\n",
1377
                 sessioncookie);
1378
        ff_http_set_headers(rt->rtsp_hd, headers);
1379

    
1380
        /* complete the connection */
1381
        if (url_connect(rt->rtsp_hd)) {
1382
            err = AVERROR(EIO);
1383
            goto fail;
1384
        }
1385

    
1386
        /* POST requests */
1387
        if (url_alloc(&rt->rtsp_hd_out, httpname, URL_WRONLY) < 0 ) {
1388
            err = AVERROR(EIO);
1389
            goto fail;
1390
        }
1391

    
1392
        /* generate POST headers */
1393
        snprintf(headers, sizeof(headers),
1394
                 "x-sessioncookie: %s\r\n"
1395
                 "Content-Type: application/x-rtsp-tunnelled\r\n"
1396
                 "Pragma: no-cache\r\n"
1397
                 "Cache-Control: no-cache\r\n"
1398
                 "Content-Length: 32767\r\n"
1399
                 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1400
                 sessioncookie);
1401
        ff_http_set_headers(rt->rtsp_hd_out, headers);
1402
        ff_http_set_chunked_transfer_encoding(rt->rtsp_hd_out, 0);
1403

    
1404
        /* Initialize the authentication state for the POST session. The HTTP
1405
         * protocol implementation doesn't properly handle multi-pass
1406
         * authentication for POST requests, since it would require one of
1407
         * the following:
1408
         * - implementing Expect: 100-continue, which many HTTP servers
1409
         *   don't support anyway, even less the RTSP servers that do HTTP
1410
         *   tunneling
1411
         * - sending the whole POST data until getting a 401 reply specifying
1412
         *   what authentication method to use, then resending all that data
1413
         * - waiting for potential 401 replies directly after sending the
1414
         *   POST header (waiting for some unspecified time)
1415
         * Therefore, we copy the full auth state, which works for both basic
1416
         * and digest. (For digest, we would have to synchronize the nonce
1417
         * count variable between the two sessions, if we'd do more requests
1418
         * with the original session, though.)
1419
         */
1420
        ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1421

    
1422
        /* complete the connection */
1423
        if (url_connect(rt->rtsp_hd_out)) {
1424
            err = AVERROR(EIO);
1425
            goto fail;
1426
        }
1427
    } else {
1428
        /* open the tcp connection */
1429
        ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1430
        if (url_open(&rt->rtsp_hd, tcpname, URL_RDWR) < 0) {
1431
            err = AVERROR(EIO);
1432
            goto fail;
1433
        }
1434
        rt->rtsp_hd_out = rt->rtsp_hd;
1435
    }
1436
    rt->seq = 0;
1437

    
1438
    tcp_fd = url_get_file_handle(rt->rtsp_hd);
1439
    if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1440
        getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1441
                    NULL, 0, NI_NUMERICHOST);
1442
    }
1443

    
1444
    /* request options supported by the server; this also detects server
1445
     * type */
1446
    for (rt->server_type = RTSP_SERVER_RTP;;) {
1447
        cmd[0] = 0;
1448
        if (rt->server_type == RTSP_SERVER_REAL)
1449
            av_strlcat(cmd,
1450
                       /**
1451
                        * The following entries are required for proper
1452
                        * streaming from a Realmedia server. They are
1453
                        * interdependent in some way although we currently
1454
                        * don't quite understand how. Values were copied
1455
                        * from mplayer SVN r23589.
1456
                        * @param CompanyID is a 16-byte ID in base64
1457
                        * @param ClientChallenge is a 16-byte ID in hex
1458
                        */
1459
                       "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1460
                       "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1461
                       "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1462
                       "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1463
                       sizeof(cmd));
1464
        ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1465
        if (reply->status_code != RTSP_STATUS_OK) {
1466
            err = AVERROR_INVALIDDATA;
1467
            goto fail;
1468
        }
1469

    
1470
        /* detect server type if not standard-compliant RTP */
1471
        if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1472
            rt->server_type = RTSP_SERVER_REAL;
1473
            continue;
1474
        } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1475
            rt->server_type = RTSP_SERVER_WMS;
1476
        } else if (rt->server_type == RTSP_SERVER_REAL)
1477
            strcpy(real_challenge, reply->real_challenge);
1478
        break;
1479
    }
1480

    
1481
    if (s->iformat && CONFIG_RTSP_DEMUXER)
1482
        err = ff_rtsp_setup_input_streams(s, reply);
1483
    else if (CONFIG_RTSP_MUXER)
1484
        err = ff_rtsp_setup_output_streams(s, host);
1485
    if (err)
1486
        goto fail;
1487

    
1488
    do {
1489
        int lower_transport = ff_log2_tab[lower_transport_mask &
1490
                                  ~(lower_transport_mask - 1)];
1491

    
1492
        err = make_setup_request(s, host, port, lower_transport,
1493
                                 rt->server_type == RTSP_SERVER_REAL ?
1494
                                     real_challenge : NULL);
1495
        if (err < 0)
1496
            goto fail;
1497
        lower_transport_mask &= ~(1 << lower_transport);
1498
        if (lower_transport_mask == 0 && err == 1) {
1499
            err = FF_NETERROR(EPROTONOSUPPORT);
1500
            goto fail;
1501
        }
1502
    } while (err);
1503

    
1504
    rt->state = RTSP_STATE_IDLE;
1505
    rt->seek_timestamp = 0; /* default is to start stream at position zero */
1506
    return 0;
1507
 fail:
1508
    ff_rtsp_close_streams(s);
1509
    ff_rtsp_close_connections(s);
1510
    if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1511
        av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1512
        av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1513
               reply->status_code,
1514
               s->filename);
1515
        goto redirect;
1516
    }
1517
    ff_network_close();
1518
    return err;
1519
}
1520
#endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1521

    
1522
#if CONFIG_RTPDEC
1523
static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1524
                           uint8_t *buf, int buf_size, int64_t wait_end)
1525
{
1526
    RTSPState *rt = s->priv_data;
1527
    RTSPStream *rtsp_st;
1528
    fd_set rfds;
1529
    int fd, fd_rtcp, fd_max, n, i, ret, tcp_fd, timeout_cnt = 0;
1530
    struct timeval tv;
1531

    
1532
    for (;;) {
1533
        if (url_interrupt_cb())
1534
            return AVERROR(EINTR);
1535
        if (wait_end && wait_end - av_gettime() < 0)
1536
            return AVERROR(EAGAIN);
1537
        FD_ZERO(&rfds);
1538
        if (rt->rtsp_hd) {
1539
            tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1540
            FD_SET(tcp_fd, &rfds);
1541
        } else {
1542
            fd_max = 0;
1543
            tcp_fd = -1;
1544
        }
1545
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1546
            rtsp_st = rt->rtsp_streams[i];
1547
            if (rtsp_st->rtp_handle) {
1548
                fd = url_get_file_handle(rtsp_st->rtp_handle);
1549
                fd_rtcp = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1550
                if (FFMAX(fd, fd_rtcp) > fd_max)
1551
                    fd_max = FFMAX(fd, fd_rtcp);
1552
                FD_SET(fd, &rfds);
1553
                FD_SET(fd_rtcp, &rfds);
1554
            }
1555
        }
1556
        tv.tv_sec = 0;
1557
        tv.tv_usec = SELECT_TIMEOUT_MS * 1000;
1558
        n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1559
        if (n > 0) {
1560
            timeout_cnt = 0;
1561
            for (i = 0; i < rt->nb_rtsp_streams; i++) {
1562
                rtsp_st = rt->rtsp_streams[i];
1563
                if (rtsp_st->rtp_handle) {
1564
                    fd = url_get_file_handle(rtsp_st->rtp_handle);
1565
                    fd_rtcp = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1566
                    if (FD_ISSET(fd_rtcp, &rfds) || FD_ISSET(fd, &rfds)) {
1567
                        ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1568
                        if (ret > 0) {
1569
                            *prtsp_st = rtsp_st;
1570
                            return ret;
1571
                        }
1572
                    }
1573
                }
1574
            }
1575
#if CONFIG_RTSP_DEMUXER
1576
            if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
1577
                RTSPMessageHeader reply;
1578

    
1579
                ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1580
                if (ret < 0)
1581
                    return ret;
1582
                /* XXX: parse message */
1583
                if (rt->state != RTSP_STATE_STREAMING)
1584
                    return 0;
1585
            }
1586
#endif
1587
        } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1588
            return FF_NETERROR(ETIMEDOUT);
1589
        } else if (n < 0 && errno != EINTR)
1590
            return AVERROR(errno);
1591
    }
1592
}
1593

    
1594
int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1595
{
1596
    RTSPState *rt = s->priv_data;
1597
    int ret, len;
1598
    RTSPStream *rtsp_st, *first_queue_st = NULL;
1599
    int64_t wait_end = 0;
1600

    
1601
    if (rt->nb_byes == rt->nb_rtsp_streams)
1602
        return AVERROR_EOF;
1603

    
1604
    /* get next frames from the same RTP packet */
1605
    if (rt->cur_transport_priv) {
1606
        if (rt->transport == RTSP_TRANSPORT_RDT) {
1607
            ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1608
        } else
1609
            ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1610
        if (ret == 0) {
1611
            rt->cur_transport_priv = NULL;
1612
            return 0;
1613
        } else if (ret == 1) {
1614
            return 0;
1615
        } else
1616
            rt->cur_transport_priv = NULL;
1617
    }
1618

    
1619
    if (rt->transport == RTSP_TRANSPORT_RTP) {
1620
        int i;
1621
        int64_t first_queue_time = 0;
1622
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1623
            RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1624
            int64_t queue_time;
1625
            if (!rtpctx)
1626
                continue;
1627
            queue_time = ff_rtp_queued_packet_time(rtpctx);
1628
            if (queue_time && (queue_time - first_queue_time < 0 ||
1629
                               !first_queue_time)) {
1630
                first_queue_time = queue_time;
1631
                first_queue_st   = rt->rtsp_streams[i];
1632
            }
1633
        }
1634
        if (first_queue_time)
1635
            wait_end = first_queue_time + s->max_delay;
1636
    }
1637

    
1638
    /* read next RTP packet */
1639
 redo:
1640
    if (!rt->recvbuf) {
1641
        rt->recvbuf = av_malloc(RECVBUF_SIZE);
1642
        if (!rt->recvbuf)
1643
            return AVERROR(ENOMEM);
1644
    }
1645

    
1646
    switch(rt->lower_transport) {
1647
    default:
1648
#if CONFIG_RTSP_DEMUXER
1649
    case RTSP_LOWER_TRANSPORT_TCP:
1650
        len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
1651
        break;
1652
#endif
1653
    case RTSP_LOWER_TRANSPORT_UDP:
1654
    case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1655
        len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
1656
        if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1657
            rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1658
        break;
1659
    }
1660
    if (len == AVERROR(EAGAIN) && first_queue_st &&
1661
        rt->transport == RTSP_TRANSPORT_RTP) {
1662
        rtsp_st = first_queue_st;
1663
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
1664
        goto end;
1665
    }
1666
    if (len < 0)
1667
        return len;
1668
    if (len == 0)
1669
        return AVERROR_EOF;
1670
    if (rt->transport == RTSP_TRANSPORT_RDT) {
1671
        ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1672
    } else {
1673
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1674
        if (ret < 0) {
1675
            /* Either bad packet, or a RTCP packet. Check if the
1676
             * first_rtcp_ntp_time field was initialized. */
1677
            RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1678
            if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1679
                /* first_rtcp_ntp_time has been initialized for this stream,
1680
                 * copy the same value to all other uninitialized streams,
1681
                 * in order to map their timestamp origin to the same ntp time
1682
                 * as this one. */
1683
                int i;
1684
                AVStream *st = NULL;
1685
                if (rtsp_st->stream_index >= 0)
1686
                    st = s->streams[rtsp_st->stream_index];
1687
                for (i = 0; i < rt->nb_rtsp_streams; i++) {
1688
                    RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
1689
                    AVStream *st2 = NULL;
1690
                    if (rt->rtsp_streams[i]->stream_index >= 0)
1691
                        st2 = s->streams[rt->rtsp_streams[i]->stream_index];
1692
                    if (rtpctx2 && st && st2 &&
1693
                        rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
1694
                        rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1695
                        rtpctx2->rtcp_ts_offset = av_rescale_q(
1696
                            rtpctx->rtcp_ts_offset, st->time_base,
1697
                            st2->time_base);
1698
                    }
1699
                }
1700
            }
1701
            if (ret == -RTCP_BYE) {
1702
                rt->nb_byes++;
1703

    
1704
                av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1705
                       rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1706

    
1707
                if (rt->nb_byes == rt->nb_rtsp_streams)
1708
                    return AVERROR_EOF;
1709
            }
1710
        }
1711
    }
1712
end:
1713
    if (ret < 0)
1714
        goto redo;
1715
    if (ret == 1)
1716
        /* more packets may follow, so we save the RTP context */
1717
        rt->cur_transport_priv = rtsp_st->transport_priv;
1718

    
1719
    return ret;
1720
}
1721
#endif /* CONFIG_RTPDEC */
1722

    
1723
#if CONFIG_SDP_DEMUXER
1724
static int sdp_probe(AVProbeData *p1)
1725
{
1726
    const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1727

    
1728
    /* we look for a line beginning "c=IN IP" */
1729
    while (p < p_end && *p != '\0') {
1730
        if (p + sizeof("c=IN IP") - 1 < p_end &&
1731
            av_strstart(p, "c=IN IP", NULL))
1732
            return AVPROBE_SCORE_MAX / 2;
1733

    
1734
        while (p < p_end - 1 && *p != '\n') p++;
1735
        if (++p >= p_end)
1736
            break;
1737
        if (*p == '\r')
1738
            p++;
1739
    }
1740
    return 0;
1741
}
1742

    
1743
static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1744
{
1745
    RTSPState *rt = s->priv_data;
1746
    RTSPStream *rtsp_st;
1747
    int size, i, err;
1748
    char *content;
1749
    char url[1024];
1750

    
1751
    if (!ff_network_init())
1752
        return AVERROR(EIO);
1753

    
1754
    /* read the whole sdp file */
1755
    /* XXX: better loading */
1756
    content = av_malloc(SDP_MAX_SIZE);
1757
    size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1758
    if (size <= 0) {
1759
        av_free(content);
1760
        return AVERROR_INVALIDDATA;
1761
    }
1762
    content[size] ='\0';
1763

    
1764
    ff_sdp_parse(s, content);
1765
    av_free(content);
1766

    
1767
    /* open each RTP stream */
1768
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
1769
        char namebuf[50];
1770
        rtsp_st = rt->rtsp_streams[i];
1771

    
1772
        getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
1773
                    namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1774
        ff_url_join(url, sizeof(url), "rtp", NULL,
1775
                    namebuf, rtsp_st->sdp_port,
1776
                    "?localport=%d&ttl=%d", rtsp_st->sdp_port,
1777
                    rtsp_st->sdp_ttl);
1778
        if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1779
            err = AVERROR_INVALIDDATA;
1780
            goto fail;
1781
        }
1782
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1783
            goto fail;
1784
    }
1785
    return 0;
1786
fail:
1787
    ff_rtsp_close_streams(s);
1788
    ff_network_close();
1789
    return err;
1790
}
1791

    
1792
static int sdp_read_close(AVFormatContext *s)
1793
{
1794
    ff_rtsp_close_streams(s);
1795
    ff_network_close();
1796
    return 0;
1797
}
1798

    
1799
AVInputFormat sdp_demuxer = {
1800
    "sdp",
1801
    NULL_IF_CONFIG_SMALL("SDP"),
1802
    sizeof(RTSPState),
1803
    sdp_probe,
1804
    sdp_read_header,
1805
    ff_rtsp_fetch_packet,
1806
    sdp_read_close,
1807
};
1808
#endif /* CONFIG_SDP_DEMUXER */
1809

    
1810
#if CONFIG_RTP_DEMUXER
1811
static int rtp_probe(AVProbeData *p)
1812
{
1813
    if (av_strstart(p->filename, "rtp:", NULL))
1814
        return AVPROBE_SCORE_MAX;
1815
    return 0;
1816
}
1817

    
1818
static int rtp_read_header(AVFormatContext *s,
1819
                           AVFormatParameters *ap)
1820
{
1821
    uint8_t recvbuf[1500];
1822
    char host[500], sdp[500];
1823
    int ret, port;
1824
    URLContext* in = NULL;
1825
    int payload_type;
1826
    AVCodecContext codec;
1827
    struct sockaddr_storage addr;
1828
    ByteIOContext pb;
1829
    socklen_t addrlen = sizeof(addr);
1830

    
1831
    if (!ff_network_init())
1832
        return AVERROR(EIO);
1833

    
1834
    ret = url_open(&in, s->filename, URL_RDONLY);
1835
    if (ret)
1836
        goto fail;
1837

    
1838
    while (1) {
1839
        ret = url_read(in, recvbuf, sizeof(recvbuf));
1840
        if (ret == AVERROR(EAGAIN))
1841
            continue;
1842
        if (ret < 0)
1843
            goto fail;
1844
        if (ret < 12) {
1845
            av_log(s, AV_LOG_WARNING, "Received too short packet\n");
1846
            continue;
1847
        }
1848

    
1849
        if ((recvbuf[0] & 0xc0) != 0x80) {
1850
            av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
1851
                                      "received\n");
1852
            continue;
1853
        }
1854

    
1855
        payload_type = recvbuf[1] & 0x7f;
1856
        break;
1857
    }
1858
    getsockname(url_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
1859
    url_close(in);
1860
    in = NULL;
1861

    
1862
    memset(&codec, 0, sizeof(codec));
1863
    if (ff_rtp_get_codec_info(&codec, payload_type)) {
1864
        av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
1865
                                "without an SDP file describing it\n",
1866
                                 payload_type);
1867
        goto fail;
1868
    }
1869
    if (codec.codec_type != AVMEDIA_TYPE_DATA) {
1870
        av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
1871
                                  "properly you need an SDP file "
1872
                                  "describing it\n");
1873
    }
1874

    
1875
    av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
1876
                 NULL, 0, s->filename);
1877

    
1878
    snprintf(sdp, sizeof(sdp),
1879
             "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
1880
             addr.ss_family == AF_INET ? 4 : 6, host,
1881
             codec.codec_type == AVMEDIA_TYPE_DATA  ? "application" :
1882
             codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
1883
             port, payload_type);
1884
    av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
1885

    
1886
    init_put_byte(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
1887
    s->pb = &pb;
1888

    
1889
    /* sdp_read_header initializes this again */
1890
    ff_network_close();
1891

    
1892
    ret = sdp_read_header(s, ap);
1893
    s->pb = NULL;
1894
    return ret;
1895

    
1896
fail:
1897
    if (in)
1898
        url_close(in);
1899
    ff_network_close();
1900
    return ret;
1901
}
1902

    
1903
AVInputFormat rtp_demuxer = {
1904
    "rtp",
1905
    NULL_IF_CONFIG_SMALL("RTP input format"),
1906
    sizeof(RTSPState),
1907
    rtp_probe,
1908
    rtp_read_header,
1909
    ff_rtsp_fetch_packet,
1910
    sdp_read_close,
1911
    .flags = AVFMT_NOFILE,
1912
};
1913
#endif /* CONFIG_RTP_DEMUXER */
1914