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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.
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 *
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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"
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#include "network.h"
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#include "os_support.h"
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#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  */
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#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;
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        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
void ff_rtsp_undo_setup(AVFormatContext *s)
478
{
479
    RTSPState *rt = s->priv_data;
480
    int i;
481

    
482
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
483
        RTSPStream *rtsp_st = rt->rtsp_streams[i];
484
        if (!rtsp_st)
485
            continue;
486
        if (rtsp_st->transport_priv) {
487
            if (s->oformat) {
488
                AVFormatContext *rtpctx = rtsp_st->transport_priv;
489
                av_write_trailer(rtpctx);
490
                if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
491
                    uint8_t *ptr;
492
                    url_close_dyn_buf(rtpctx->pb, &ptr);
493
                    av_free(ptr);
494
                } else {
495
                    url_fclose(rtpctx->pb);
496
                }
497
                av_metadata_free(&rtpctx->streams[0]->metadata);
498
                av_metadata_free(&rtpctx->metadata);
499
                av_free(rtpctx->streams[0]);
500
                av_free(rtpctx);
501
            } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
502
                ff_rdt_parse_close(rtsp_st->transport_priv);
503
            else if (CONFIG_RTPDEC)
504
                rtp_parse_close(rtsp_st->transport_priv);
505
        }
506
        rtsp_st->transport_priv = NULL;
507
        if (rtsp_st->rtp_handle)
508
            url_close(rtsp_st->rtp_handle);
509
        rtsp_st->rtp_handle = NULL;
510
    }
511
}
512

    
513
/* close and free RTSP streams */
514
void ff_rtsp_close_streams(AVFormatContext *s)
515
{
516
    RTSPState *rt = s->priv_data;
517
    int i;
518
    RTSPStream *rtsp_st;
519

    
520
    ff_rtsp_undo_setup(s);
521
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
522
        rtsp_st = rt->rtsp_streams[i];
523
        if (rtsp_st) {
524
            if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
525
                rtsp_st->dynamic_handler->close(
526
                    rtsp_st->dynamic_protocol_context);
527
        }
528
    }
529
    av_free(rt->rtsp_streams);
530
    if (rt->asf_ctx) {
531
        av_close_input_stream (rt->asf_ctx);
532
        rt->asf_ctx = NULL;
533
    }
534
    av_free(rt->recvbuf);
535
}
536

    
537
static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
538
{
539
    RTSPState *rt = s->priv_data;
540
    AVStream *st = NULL;
541

    
542
    /* open the RTP context */
543
    if (rtsp_st->stream_index >= 0)
544
        st = s->streams[rtsp_st->stream_index];
545
    if (!st)
546
        s->ctx_flags |= AVFMTCTX_NOHEADER;
547

    
548
    if (s->oformat && CONFIG_RTSP_MUXER) {
549
        rtsp_st->transport_priv = ff_rtp_chain_mux_open(s, st,
550
                                      rtsp_st->rtp_handle,
551
                                      RTSP_TCP_MAX_PACKET_SIZE);
552
        /* Ownership of rtp_handle is passed to the rtp mux context */
553
        rtsp_st->rtp_handle = NULL;
554
    } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
555
        rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
556
                                            rtsp_st->dynamic_protocol_context,
557
                                            rtsp_st->dynamic_handler);
558
    else if (CONFIG_RTPDEC)
559
        rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
560
                                         rtsp_st->sdp_payload_type,
561
            (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
562
            ? 0 : RTP_REORDER_QUEUE_DEFAULT_SIZE);
563

    
564
    if (!rtsp_st->transport_priv) {
565
         return AVERROR(ENOMEM);
566
    } else if (rt->transport != RTSP_TRANSPORT_RDT && CONFIG_RTPDEC) {
567
        if (rtsp_st->dynamic_handler) {
568
            rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
569
                                           rtsp_st->dynamic_protocol_context,
570
                                           rtsp_st->dynamic_handler);
571
        }
572
    }
573

    
574
    return 0;
575
}
576

    
577
#if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
578
static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
579
{
580
    const char *p;
581
    int v;
582

    
583
    p = *pp;
584
    p += strspn(p, SPACE_CHARS);
585
    v = strtol(p, (char **)&p, 10);
586
    if (*p == '-') {
587
        p++;
588
        *min_ptr = v;
589
        v = strtol(p, (char **)&p, 10);
590
        *max_ptr = v;
591
    } else {
592
        *min_ptr = v;
593
        *max_ptr = v;
594
    }
595
    *pp = p;
596
}
597

    
598
/* XXX: only one transport specification is parsed */
599
static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
600
{
601
    char transport_protocol[16];
602
    char profile[16];
603
    char lower_transport[16];
604
    char parameter[16];
605
    RTSPTransportField *th;
606
    char buf[256];
607

    
608
    reply->nb_transports = 0;
609

    
610
    for (;;) {
611
        p += strspn(p, SPACE_CHARS);
612
        if (*p == '\0')
613
            break;
614

    
615
        th = &reply->transports[reply->nb_transports];
616

    
617
        get_word_sep(transport_protocol, sizeof(transport_protocol),
618
                     "/", &p);
619
        if (!strcasecmp (transport_protocol, "rtp")) {
620
            get_word_sep(profile, sizeof(profile), "/;,", &p);
621
            lower_transport[0] = '\0';
622
            /* rtp/avp/<protocol> */
623
            if (*p == '/') {
624
                get_word_sep(lower_transport, sizeof(lower_transport),
625
                             ";,", &p);
626
            }
627
            th->transport = RTSP_TRANSPORT_RTP;
628
        } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
629
                   !strcasecmp (transport_protocol, "x-real-rdt")) {
630
            /* x-pn-tng/<protocol> */
631
            get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
632
            profile[0] = '\0';
633
            th->transport = RTSP_TRANSPORT_RDT;
634
        }
635
        if (!strcasecmp(lower_transport, "TCP"))
636
            th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
637
        else
638
            th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
639

    
640
        if (*p == ';')
641
            p++;
642
        /* get each parameter */
643
        while (*p != '\0' && *p != ',') {
644
            get_word_sep(parameter, sizeof(parameter), "=;,", &p);
645
            if (!strcmp(parameter, "port")) {
646
                if (*p == '=') {
647
                    p++;
648
                    rtsp_parse_range(&th->port_min, &th->port_max, &p);
649
                }
650
            } else if (!strcmp(parameter, "client_port")) {
651
                if (*p == '=') {
652
                    p++;
653
                    rtsp_parse_range(&th->client_port_min,
654
                                     &th->client_port_max, &p);
655
                }
656
            } else if (!strcmp(parameter, "server_port")) {
657
                if (*p == '=') {
658
                    p++;
659
                    rtsp_parse_range(&th->server_port_min,
660
                                     &th->server_port_max, &p);
661
                }
662
            } else if (!strcmp(parameter, "interleaved")) {
663
                if (*p == '=') {
664
                    p++;
665
                    rtsp_parse_range(&th->interleaved_min,
666
                                     &th->interleaved_max, &p);
667
                }
668
            } else if (!strcmp(parameter, "multicast")) {
669
                if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
670
                    th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
671
            } else if (!strcmp(parameter, "ttl")) {
672
                if (*p == '=') {
673
                    p++;
674
                    th->ttl = strtol(p, (char **)&p, 10);
675
                }
676
            } else if (!strcmp(parameter, "destination")) {
677
                if (*p == '=') {
678
                    p++;
679
                    get_word_sep(buf, sizeof(buf), ";,", &p);
680
                    get_sockaddr(buf, &th->destination);
681
                }
682
            } else if (!strcmp(parameter, "source")) {
683
                if (*p == '=') {
684
                    p++;
685
                    get_word_sep(buf, sizeof(buf), ";,", &p);
686
                    av_strlcpy(th->source, buf, sizeof(th->source));
687
                }
688
            }
689

    
690
            while (*p != ';' && *p != '\0' && *p != ',')
691
                p++;
692
            if (*p == ';')
693
                p++;
694
        }
695
        if (*p == ',')
696
            p++;
697

    
698
        reply->nb_transports++;
699
    }
700
}
701

    
702
static void handle_rtp_info(RTSPState *rt, const char *url,
703
                            uint32_t seq, uint32_t rtptime)
704
{
705
    int i;
706
    if (!rtptime || !url[0])
707
        return;
708
    if (rt->transport != RTSP_TRANSPORT_RTP)
709
        return;
710
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
711
        RTSPStream *rtsp_st = rt->rtsp_streams[i];
712
        RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
713
        if (!rtpctx)
714
            continue;
715
        if (!strcmp(rtsp_st->control_url, url)) {
716
            rtpctx->base_timestamp = rtptime;
717
            break;
718
        }
719
    }
720
}
721

    
722
static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
723
{
724
    int read = 0;
725
    char key[20], value[1024], url[1024] = "";
726
    uint32_t seq = 0, rtptime = 0;
727

    
728
    for (;;) {
729
        p += strspn(p, SPACE_CHARS);
730
        if (!*p)
731
            break;
732
        get_word_sep(key, sizeof(key), "=", &p);
733
        if (*p != '=')
734
            break;
735
        p++;
736
        get_word_sep(value, sizeof(value), ";, ", &p);
737
        read++;
738
        if (!strcmp(key, "url"))
739
            av_strlcpy(url, value, sizeof(url));
740
        else if (!strcmp(key, "seq"))
741
            seq = strtol(value, NULL, 10);
742
        else if (!strcmp(key, "rtptime"))
743
            rtptime = strtol(value, NULL, 10);
744
        if (*p == ',') {
745
            handle_rtp_info(rt, url, seq, rtptime);
746
            url[0] = '\0';
747
            seq = rtptime = 0;
748
            read = 0;
749
        }
750
        if (*p)
751
            p++;
752
    }
753
    if (read > 0)
754
        handle_rtp_info(rt, url, seq, rtptime);
755
}
756

    
757
void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
758
                        RTSPState *rt, const char *method)
759
{
760
    const char *p;
761

    
762
    /* NOTE: we do case independent match for broken servers */
763
    p = buf;
764
    if (av_stristart(p, "Session:", &p)) {
765
        int t;
766
        get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
767
        if (av_stristart(p, ";timeout=", &p) &&
768
            (t = strtol(p, NULL, 10)) > 0) {
769
            reply->timeout = t;
770
        }
771
    } else if (av_stristart(p, "Content-Length:", &p)) {
772
        reply->content_length = strtol(p, NULL, 10);
773
    } else if (av_stristart(p, "Transport:", &p)) {
774
        rtsp_parse_transport(reply, p);
775
    } else if (av_stristart(p, "CSeq:", &p)) {
776
        reply->seq = strtol(p, NULL, 10);
777
    } else if (av_stristart(p, "Range:", &p)) {
778
        rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
779
    } else if (av_stristart(p, "RealChallenge1:", &p)) {
780
        p += strspn(p, SPACE_CHARS);
781
        av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
782
    } else if (av_stristart(p, "Server:", &p)) {
783
        p += strspn(p, SPACE_CHARS);
784
        av_strlcpy(reply->server, p, sizeof(reply->server));
785
    } else if (av_stristart(p, "Notice:", &p) ||
786
               av_stristart(p, "X-Notice:", &p)) {
787
        reply->notice = strtol(p, NULL, 10);
788
    } else if (av_stristart(p, "Location:", &p)) {
789
        p += strspn(p, SPACE_CHARS);
790
        av_strlcpy(reply->location, p , sizeof(reply->location));
791
    } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
792
        p += strspn(p, SPACE_CHARS);
793
        ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
794
    } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
795
        p += strspn(p, SPACE_CHARS);
796
        ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
797
    } else if (av_stristart(p, "Content-Base:", &p) && rt) {
798
        p += strspn(p, SPACE_CHARS);
799
        if (method && !strcmp(method, "DESCRIBE"))
800
            av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
801
    } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
802
        p += strspn(p, SPACE_CHARS);
803
        if (method && !strcmp(method, "PLAY"))
804
            rtsp_parse_rtp_info(rt, p);
805
    }
806
}
807

    
808
/* skip a RTP/TCP interleaved packet */
809
void ff_rtsp_skip_packet(AVFormatContext *s)
810
{
811
    RTSPState *rt = s->priv_data;
812
    int ret, len, len1;
813
    uint8_t buf[1024];
814

    
815
    ret = url_read_complete(rt->rtsp_hd, buf, 3);
816
    if (ret != 3)
817
        return;
818
    len = AV_RB16(buf + 1);
819

    
820
    dprintf(s, "skipping RTP packet len=%d\n", len);
821

    
822
    /* skip payload */
823
    while (len > 0) {
824
        len1 = len;
825
        if (len1 > sizeof(buf))
826
            len1 = sizeof(buf);
827
        ret = url_read_complete(rt->rtsp_hd, buf, len1);
828
        if (ret != len1)
829
            return;
830
        len -= len1;
831
    }
832
}
833

    
834
int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
835
                       unsigned char **content_ptr,
836
                       int return_on_interleaved_data, const char *method)
837
{
838
    RTSPState *rt = s->priv_data;
839
    char buf[4096], buf1[1024], *q;
840
    unsigned char ch;
841
    const char *p;
842
    int ret, content_length, line_count = 0;
843
    unsigned char *content = NULL;
844

    
845
    memset(reply, 0, sizeof(*reply));
846

    
847
    /* parse reply (XXX: use buffers) */
848
    rt->last_reply[0] = '\0';
849
    for (;;) {
850
        q = buf;
851
        for (;;) {
852
            ret = url_read_complete(rt->rtsp_hd, &ch, 1);
853
#ifdef DEBUG_RTP_TCP
854
            dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
855
#endif
856
            if (ret != 1)
857
                return AVERROR_EOF;
858
            if (ch == '\n')
859
                break;
860
            if (ch == '$') {
861
                /* XXX: only parse it if first char on line ? */
862
                if (return_on_interleaved_data) {
863
                    return 1;
864
                } else
865
                    ff_rtsp_skip_packet(s);
866
            } else if (ch != '\r') {
867
                if ((q - buf) < sizeof(buf) - 1)
868
                    *q++ = ch;
869
            }
870
        }
871
        *q = '\0';
872

    
873
        dprintf(s, "line='%s'\n", buf);
874

    
875
        /* test if last line */
876
        if (buf[0] == '\0')
877
            break;
878
        p = buf;
879
        if (line_count == 0) {
880
            /* get reply code */
881
            get_word(buf1, sizeof(buf1), &p);
882
            get_word(buf1, sizeof(buf1), &p);
883
            reply->status_code = atoi(buf1);
884
            av_strlcpy(reply->reason, p, sizeof(reply->reason));
885
        } else {
886
            ff_rtsp_parse_line(reply, p, rt, method);
887
            av_strlcat(rt->last_reply, p,    sizeof(rt->last_reply));
888
            av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
889
        }
890
        line_count++;
891
    }
892

    
893
    if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
894
        av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
895

    
896
    content_length = reply->content_length;
897
    if (content_length > 0) {
898
        /* leave some room for a trailing '\0' (useful for simple parsing) */
899
        content = av_malloc(content_length + 1);
900
        (void)url_read_complete(rt->rtsp_hd, content, content_length);
901
        content[content_length] = '\0';
902
    }
903
    if (content_ptr)
904
        *content_ptr = content;
905
    else
906
        av_free(content);
907

    
908
    if (rt->seq != reply->seq) {
909
        av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
910
            rt->seq, reply->seq);
911
    }
912

    
913
    /* EOS */
914
    if (reply->notice == 2101 /* End-of-Stream Reached */      ||
915
        reply->notice == 2104 /* Start-of-Stream Reached */    ||
916
        reply->notice == 2306 /* Continuous Feed Terminated */) {
917
        rt->state = RTSP_STATE_IDLE;
918
    } else if (reply->notice >= 4400 && reply->notice < 5500) {
919
        return AVERROR(EIO); /* data or server error */
920
    } else if (reply->notice == 2401 /* Ticket Expired */ ||
921
             (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
922
        return AVERROR(EPERM);
923

    
924
    return 0;
925
}
926

    
927
int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
928
                                        const char *method, const char *url,
929
                                        const char *headers,
930
                                        const unsigned char *send_content,
931
                                        int send_content_length)
932
{
933
    RTSPState *rt = s->priv_data;
934
    char buf[4096], *out_buf;
935
    char base64buf[AV_BASE64_SIZE(sizeof(buf))];
936

    
937
    /* Add in RTSP headers */
938
    out_buf = buf;
939
    rt->seq++;
940
    snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
941
    if (headers)
942
        av_strlcat(buf, headers, sizeof(buf));
943
    av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
944
    if (rt->session_id[0] != '\0' && (!headers ||
945
        !strstr(headers, "\nIf-Match:"))) {
946
        av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
947
    }
948
    if (rt->auth[0]) {
949
        char *str = ff_http_auth_create_response(&rt->auth_state,
950
                                                 rt->auth, url, method);
951
        if (str)
952
            av_strlcat(buf, str, sizeof(buf));
953
        av_free(str);
954
    }
955
    if (send_content_length > 0 && send_content)
956
        av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
957
    av_strlcat(buf, "\r\n", sizeof(buf));
958

    
959
    /* base64 encode rtsp if tunneling */
960
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
961
        av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
962
        out_buf = base64buf;
963
    }
964

    
965
    dprintf(s, "Sending:\n%s--\n", buf);
966

    
967
    url_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
968
    if (send_content_length > 0 && send_content) {
969
        if (rt->control_transport == RTSP_MODE_TUNNEL) {
970
            av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
971
                                    "with content data not supported\n");
972
            return AVERROR_PATCHWELCOME;
973
        }
974
        url_write(rt->rtsp_hd_out, send_content, send_content_length);
975
    }
976
    rt->last_cmd_time = av_gettime();
977

    
978
    return 0;
979
}
980

    
981
int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
982
                           const char *url, const char *headers)
983
{
984
    return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
985
}
986

    
987
int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
988
                     const char *headers, RTSPMessageHeader *reply,
989
                     unsigned char **content_ptr)
990
{
991
    return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
992
                                         content_ptr, NULL, 0);
993
}
994

    
995
int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
996
                                  const char *method, const char *url,
997
                                  const char *header,
998
                                  RTSPMessageHeader *reply,
999
                                  unsigned char **content_ptr,
1000
                                  const unsigned char *send_content,
1001
                                  int send_content_length)
1002
{
1003
    RTSPState *rt = s->priv_data;
1004
    HTTPAuthType cur_auth_type;
1005
    int ret;
1006

    
1007
retry:
1008
    cur_auth_type = rt->auth_state.auth_type;
1009
    if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
1010
                                                   send_content,
1011
                                                   send_content_length)))
1012
        return ret;
1013

    
1014
    if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1015
        return ret;
1016

    
1017
    if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
1018
        rt->auth_state.auth_type != HTTP_AUTH_NONE)
1019
        goto retry;
1020

    
1021
    if (reply->status_code > 400){
1022
        av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1023
               method,
1024
               reply->status_code,
1025
               reply->reason);
1026
        av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1027
    }
1028

    
1029
    return 0;
1030
}
1031

    
1032
/**
1033
 * @return 0 on success, <0 on error, 1 if protocol is unavailable.
1034
 */
1035
int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1036
                              int lower_transport, const char *real_challenge)
1037
{
1038
    RTSPState *rt = s->priv_data;
1039
    int rtx, j, i, err, interleave = 0;
1040
    RTSPStream *rtsp_st;
1041
    RTSPMessageHeader reply1, *reply = &reply1;
1042
    char cmd[2048];
1043
    const char *trans_pref;
1044

    
1045
    if (rt->transport == RTSP_TRANSPORT_RDT)
1046
        trans_pref = "x-pn-tng";
1047
    else
1048
        trans_pref = "RTP/AVP";
1049

    
1050
    /* default timeout: 1 minute */
1051
    rt->timeout = 60;
1052

    
1053
    /* for each stream, make the setup request */
1054
    /* XXX: we assume the same server is used for the control of each
1055
     * RTSP stream */
1056

    
1057
    for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1058
        char transport[2048];
1059

    
1060
        /**
1061
         * WMS serves all UDP data over a single connection, the RTX, which
1062
         * isn't necessarily the first in the SDP but has to be the first
1063
         * to be set up, else the second/third SETUP will fail with a 461.
1064
         */
1065
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1066
             rt->server_type == RTSP_SERVER_WMS) {
1067
            if (i == 0) {
1068
                /* rtx first */
1069
                for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1070
                    int len = strlen(rt->rtsp_streams[rtx]->control_url);
1071
                    if (len >= 4 &&
1072
                        !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1073
                                "/rtx"))
1074
                        break;
1075
                }
1076
                if (rtx == rt->nb_rtsp_streams)
1077
                    return -1; /* no RTX found */
1078
                rtsp_st = rt->rtsp_streams[rtx];
1079
            } else
1080
                rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1081
        } else
1082
            rtsp_st = rt->rtsp_streams[i];
1083

    
1084
        /* RTP/UDP */
1085
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1086
            char buf[256];
1087

    
1088
            if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1089
                port = reply->transports[0].client_port_min;
1090
                goto have_port;
1091
            }
1092

    
1093
            /* first try in specified port range */
1094
            if (RTSP_RTP_PORT_MIN != 0) {
1095
                while (j <= RTSP_RTP_PORT_MAX) {
1096
                    ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1097
                                "?localport=%d", j);
1098
                    /* we will use two ports per rtp stream (rtp and rtcp) */
1099
                    j += 2;
1100
                    if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1101
                        goto rtp_opened;
1102
                }
1103
            }
1104

    
1105
#if 0
1106
            /* then try on any port */
1107
            if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1108
                err = AVERROR_INVALIDDATA;
1109
                goto fail;
1110
            }
1111
#else
1112
            av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1113
            err = AVERROR(EIO);
1114
            goto fail;
1115
#endif
1116

    
1117
        rtp_opened:
1118
            port = rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1119
        have_port:
1120
            snprintf(transport, sizeof(transport) - 1,
1121
                     "%s/UDP;", trans_pref);
1122
            if (rt->server_type != RTSP_SERVER_REAL)
1123
                av_strlcat(transport, "unicast;", sizeof(transport));
1124
            av_strlcatf(transport, sizeof(transport),
1125
                     "client_port=%d", port);
1126
            if (rt->transport == RTSP_TRANSPORT_RTP &&
1127
                !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1128
                av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1129
        }
1130

    
1131
        /* RTP/TCP */
1132
        else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1133
            /** For WMS streams, the application streams are only used for
1134
             * UDP. When trying to set it up for TCP streams, the server
1135
             * will return an error. Therefore, we skip those streams. */
1136
            if (rt->server_type == RTSP_SERVER_WMS &&
1137
                s->streams[rtsp_st->stream_index]->codec->codec_type ==
1138
                    AVMEDIA_TYPE_DATA)
1139
                continue;
1140
            snprintf(transport, sizeof(transport) - 1,
1141
                     "%s/TCP;", trans_pref);
1142
            if (rt->server_type == RTSP_SERVER_WMS)
1143
                av_strlcat(transport, "unicast;", sizeof(transport));
1144
            av_strlcatf(transport, sizeof(transport),
1145
                        "interleaved=%d-%d",
1146
                        interleave, interleave + 1);
1147
            interleave += 2;
1148
        }
1149

    
1150
        else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1151
            snprintf(transport, sizeof(transport) - 1,
1152
                     "%s/UDP;multicast", trans_pref);
1153
        }
1154
        if (s->oformat) {
1155
            av_strlcat(transport, ";mode=receive", sizeof(transport));
1156
        } else if (rt->server_type == RTSP_SERVER_REAL ||
1157
                   rt->server_type == RTSP_SERVER_WMS)
1158
            av_strlcat(transport, ";mode=play", sizeof(transport));
1159
        snprintf(cmd, sizeof(cmd),
1160
                 "Transport: %s\r\n",
1161
                 transport);
1162
        if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1163
            char real_res[41], real_csum[9];
1164
            ff_rdt_calc_response_and_checksum(real_res, real_csum,
1165
                                              real_challenge);
1166
            av_strlcatf(cmd, sizeof(cmd),
1167
                        "If-Match: %s\r\n"
1168
                        "RealChallenge2: %s, sd=%s\r\n",
1169
                        rt->session_id, real_res, real_csum);
1170
        }
1171
        ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1172
        if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1173
            err = 1;
1174
            goto fail;
1175
        } else if (reply->status_code != RTSP_STATUS_OK ||
1176
                   reply->nb_transports != 1) {
1177
            err = AVERROR_INVALIDDATA;
1178
            goto fail;
1179
        }
1180

    
1181
        /* XXX: same protocol for all streams is required */
1182
        if (i > 0) {
1183
            if (reply->transports[0].lower_transport != rt->lower_transport ||
1184
                reply->transports[0].transport != rt->transport) {
1185
                err = AVERROR_INVALIDDATA;
1186
                goto fail;
1187
            }
1188
        } else {
1189
            rt->lower_transport = reply->transports[0].lower_transport;
1190
            rt->transport = reply->transports[0].transport;
1191
        }
1192

    
1193
        /* Fail if the server responded with another lower transport mode
1194
         * than what we requested. */
1195
        if (reply->transports[0].lower_transport != lower_transport) {
1196
            av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1197
            err = AVERROR_INVALIDDATA;
1198
            goto fail;
1199
        }
1200

    
1201
        switch(reply->transports[0].lower_transport) {
1202
        case RTSP_LOWER_TRANSPORT_TCP:
1203
            rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1204
            rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1205
            break;
1206

    
1207
        case RTSP_LOWER_TRANSPORT_UDP: {
1208
            char url[1024], options[30] = "";
1209

    
1210
            if (rt->filter_source)
1211
                av_strlcpy(options, "?connect=1", sizeof(options));
1212
            /* Use source address if specified */
1213
            if (reply->transports[0].source[0]) {
1214
                ff_url_join(url, sizeof(url), "rtp", NULL,
1215
                            reply->transports[0].source,
1216
                            reply->transports[0].server_port_min, options);
1217
            } else {
1218
                ff_url_join(url, sizeof(url), "rtp", NULL, host,
1219
                            reply->transports[0].server_port_min, options);
1220
            }
1221
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1222
                rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1223
                err = AVERROR_INVALIDDATA;
1224
                goto fail;
1225
            }
1226
            /* Try to initialize the connection state in a
1227
             * potential NAT router by sending dummy packets.
1228
             * RTP/RTCP dummy packets are used for RDT, too.
1229
             */
1230
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1231
                CONFIG_RTPDEC)
1232
                rtp_send_punch_packets(rtsp_st->rtp_handle);
1233
            break;
1234
        }
1235
        case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1236
            char url[1024], namebuf[50];
1237
            struct sockaddr_storage addr;
1238
            int port, ttl;
1239

    
1240
            if (reply->transports[0].destination.ss_family) {
1241
                addr      = reply->transports[0].destination;
1242
                port      = reply->transports[0].port_min;
1243
                ttl       = reply->transports[0].ttl;
1244
            } else {
1245
                addr      = rtsp_st->sdp_ip;
1246
                port      = rtsp_st->sdp_port;
1247
                ttl       = rtsp_st->sdp_ttl;
1248
            }
1249
            getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1250
                        namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1251
            ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1252
                        port, "?ttl=%d", ttl);
1253
            if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1254
                err = AVERROR_INVALIDDATA;
1255
                goto fail;
1256
            }
1257
            break;
1258
        }
1259
        }
1260

    
1261
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1262
            goto fail;
1263
    }
1264

    
1265
    if (reply->timeout > 0)
1266
        rt->timeout = reply->timeout;
1267

    
1268
    if (rt->server_type == RTSP_SERVER_REAL)
1269
        rt->need_subscription = 1;
1270

    
1271
    return 0;
1272

    
1273
fail:
1274
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
1275
        if (rt->rtsp_streams[i]->rtp_handle) {
1276
            url_close(rt->rtsp_streams[i]->rtp_handle);
1277
            rt->rtsp_streams[i]->rtp_handle = NULL;
1278
        }
1279
    }
1280
    return err;
1281
}
1282

    
1283
void ff_rtsp_close_connections(AVFormatContext *s)
1284
{
1285
    RTSPState *rt = s->priv_data;
1286
    if (rt->rtsp_hd_out != rt->rtsp_hd) url_close(rt->rtsp_hd_out);
1287
    url_close(rt->rtsp_hd);
1288
    rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1289
}
1290

    
1291
int ff_rtsp_connect(AVFormatContext *s)
1292
{
1293
    RTSPState *rt = s->priv_data;
1294
    char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1295
    char *option_list, *option, *filename;
1296
    int port, err, tcp_fd;
1297
    RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1298
    int lower_transport_mask = 0;
1299
    char real_challenge[64];
1300
    struct sockaddr_storage peer;
1301
    socklen_t peer_len = sizeof(peer);
1302

    
1303
    if (!ff_network_init())
1304
        return AVERROR(EIO);
1305
redirect:
1306
    rt->control_transport = RTSP_MODE_PLAIN;
1307
    /* extract hostname and port */
1308
    av_url_split(NULL, 0, auth, sizeof(auth),
1309
                 host, sizeof(host), &port, path, sizeof(path), s->filename);
1310
    if (*auth) {
1311
        av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1312
    }
1313
    if (port < 0)
1314
        port = RTSP_DEFAULT_PORT;
1315

    
1316
    /* search for options */
1317
    option_list = strrchr(path, '?');
1318
    if (option_list) {
1319
        /* Strip out the RTSP specific options, write out the rest of
1320
         * the options back into the same string. */
1321
        filename = option_list;
1322
        while (option_list) {
1323
            /* move the option pointer */
1324
            option = ++option_list;
1325
            option_list = strchr(option_list, '&');
1326
            if (option_list)
1327
                *option_list = 0;
1328

    
1329
            /* handle the options */
1330
            if (!strcmp(option, "udp")) {
1331
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
1332
            } else if (!strcmp(option, "multicast")) {
1333
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1334
            } else if (!strcmp(option, "tcp")) {
1335
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1336
            } else if(!strcmp(option, "http")) {
1337
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1338
                rt->control_transport = RTSP_MODE_TUNNEL;
1339
            } else if (!strcmp(option, "filter_src")) {
1340
                rt->filter_source = 1;
1341
            } else {
1342
                /* Write options back into the buffer, using memmove instead
1343
                 * of strcpy since the strings may overlap. */
1344
                int len = strlen(option);
1345
                memmove(++filename, option, len);
1346
                filename += len;
1347
                if (option_list) *filename = '&';
1348
            }
1349
        }
1350
        *filename = 0;
1351
    }
1352

    
1353
    if (!lower_transport_mask)
1354
        lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1355

    
1356
    if (s->oformat) {
1357
        /* Only UDP or TCP - UDP multicast isn't supported. */
1358
        lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1359
                                (1 << RTSP_LOWER_TRANSPORT_TCP);
1360
        if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1361
            av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1362
                                    "only UDP and TCP are supported for output.\n");
1363
            err = AVERROR(EINVAL);
1364
            goto fail;
1365
        }
1366
    }
1367

    
1368
    /* Construct the URI used in request; this is similar to s->filename,
1369
     * but with authentication credentials removed and RTSP specific options
1370
     * stripped out. */
1371
    ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1372
                host, port, "%s", path);
1373

    
1374
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
1375
        /* set up initial handshake for tunneling */
1376
        char httpname[1024];
1377
        char sessioncookie[17];
1378
        char headers[1024];
1379

    
1380
        ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1381
        snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1382
                 av_get_random_seed(), av_get_random_seed());
1383

    
1384
        /* GET requests */
1385
        if (url_alloc(&rt->rtsp_hd, httpname, URL_RDONLY) < 0) {
1386
            err = AVERROR(EIO);
1387
            goto fail;
1388
        }
1389

    
1390
        /* generate GET headers */
1391
        snprintf(headers, sizeof(headers),
1392
                 "x-sessioncookie: %s\r\n"
1393
                 "Accept: application/x-rtsp-tunnelled\r\n"
1394
                 "Pragma: no-cache\r\n"
1395
                 "Cache-Control: no-cache\r\n",
1396
                 sessioncookie);
1397
        ff_http_set_headers(rt->rtsp_hd, headers);
1398

    
1399
        /* complete the connection */
1400
        if (url_connect(rt->rtsp_hd)) {
1401
            err = AVERROR(EIO);
1402
            goto fail;
1403
        }
1404

    
1405
        /* POST requests */
1406
        if (url_alloc(&rt->rtsp_hd_out, httpname, URL_WRONLY) < 0 ) {
1407
            err = AVERROR(EIO);
1408
            goto fail;
1409
        }
1410

    
1411
        /* generate POST headers */
1412
        snprintf(headers, sizeof(headers),
1413
                 "x-sessioncookie: %s\r\n"
1414
                 "Content-Type: application/x-rtsp-tunnelled\r\n"
1415
                 "Pragma: no-cache\r\n"
1416
                 "Cache-Control: no-cache\r\n"
1417
                 "Content-Length: 32767\r\n"
1418
                 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1419
                 sessioncookie);
1420
        ff_http_set_headers(rt->rtsp_hd_out, headers);
1421
        ff_http_set_chunked_transfer_encoding(rt->rtsp_hd_out, 0);
1422

    
1423
        /* Initialize the authentication state for the POST session. The HTTP
1424
         * protocol implementation doesn't properly handle multi-pass
1425
         * authentication for POST requests, since it would require one of
1426
         * the following:
1427
         * - implementing Expect: 100-continue, which many HTTP servers
1428
         *   don't support anyway, even less the RTSP servers that do HTTP
1429
         *   tunneling
1430
         * - sending the whole POST data until getting a 401 reply specifying
1431
         *   what authentication method to use, then resending all that data
1432
         * - waiting for potential 401 replies directly after sending the
1433
         *   POST header (waiting for some unspecified time)
1434
         * Therefore, we copy the full auth state, which works for both basic
1435
         * and digest. (For digest, we would have to synchronize the nonce
1436
         * count variable between the two sessions, if we'd do more requests
1437
         * with the original session, though.)
1438
         */
1439
        ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1440

    
1441
        /* complete the connection */
1442
        if (url_connect(rt->rtsp_hd_out)) {
1443
            err = AVERROR(EIO);
1444
            goto fail;
1445
        }
1446
    } else {
1447
        /* open the tcp connection */
1448
        ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1449
        if (url_open(&rt->rtsp_hd, tcpname, URL_RDWR) < 0) {
1450
            err = AVERROR(EIO);
1451
            goto fail;
1452
        }
1453
        rt->rtsp_hd_out = rt->rtsp_hd;
1454
    }
1455
    rt->seq = 0;
1456

    
1457
    tcp_fd = url_get_file_handle(rt->rtsp_hd);
1458
    if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1459
        getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1460
                    NULL, 0, NI_NUMERICHOST);
1461
    }
1462

    
1463
    /* request options supported by the server; this also detects server
1464
     * type */
1465
    for (rt->server_type = RTSP_SERVER_RTP;;) {
1466
        cmd[0] = 0;
1467
        if (rt->server_type == RTSP_SERVER_REAL)
1468
            av_strlcat(cmd,
1469
                       /**
1470
                        * The following entries are required for proper
1471
                        * streaming from a Realmedia server. They are
1472
                        * interdependent in some way although we currently
1473
                        * don't quite understand how. Values were copied
1474
                        * from mplayer SVN r23589.
1475
                        * @param CompanyID is a 16-byte ID in base64
1476
                        * @param ClientChallenge is a 16-byte ID in hex
1477
                        */
1478
                       "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1479
                       "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1480
                       "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1481
                       "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1482
                       sizeof(cmd));
1483
        ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1484
        if (reply->status_code != RTSP_STATUS_OK) {
1485
            err = AVERROR_INVALIDDATA;
1486
            goto fail;
1487
        }
1488

    
1489
        /* detect server type if not standard-compliant RTP */
1490
        if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1491
            rt->server_type = RTSP_SERVER_REAL;
1492
            continue;
1493
        } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1494
            rt->server_type = RTSP_SERVER_WMS;
1495
        } else if (rt->server_type == RTSP_SERVER_REAL)
1496
            strcpy(real_challenge, reply->real_challenge);
1497
        break;
1498
    }
1499

    
1500
    if (s->iformat && CONFIG_RTSP_DEMUXER)
1501
        err = ff_rtsp_setup_input_streams(s, reply);
1502
    else if (CONFIG_RTSP_MUXER)
1503
        err = ff_rtsp_setup_output_streams(s, host);
1504
    if (err)
1505
        goto fail;
1506

    
1507
    do {
1508
        int lower_transport = ff_log2_tab[lower_transport_mask &
1509
                                  ~(lower_transport_mask - 1)];
1510

    
1511
        err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1512
                                 rt->server_type == RTSP_SERVER_REAL ?
1513
                                     real_challenge : NULL);
1514
        if (err < 0)
1515
            goto fail;
1516
        lower_transport_mask &= ~(1 << lower_transport);
1517
        if (lower_transport_mask == 0 && err == 1) {
1518
            err = FF_NETERROR(EPROTONOSUPPORT);
1519
            goto fail;
1520
        }
1521
    } while (err);
1522

    
1523
    rt->state = RTSP_STATE_IDLE;
1524
    rt->seek_timestamp = 0; /* default is to start stream at position zero */
1525
    return 0;
1526
 fail:
1527
    ff_rtsp_close_streams(s);
1528
    ff_rtsp_close_connections(s);
1529
    if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1530
        av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1531
        av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1532
               reply->status_code,
1533
               s->filename);
1534
        goto redirect;
1535
    }
1536
    ff_network_close();
1537
    return err;
1538
}
1539
#endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1540

    
1541
#if CONFIG_RTPDEC
1542
static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1543
                           uint8_t *buf, int buf_size, int64_t wait_end)
1544
{
1545
    RTSPState *rt = s->priv_data;
1546
    RTSPStream *rtsp_st;
1547
    fd_set rfds;
1548
    int fd, fd_rtcp, fd_max, n, i, ret, tcp_fd, timeout_cnt = 0;
1549
    struct timeval tv;
1550

    
1551
    for (;;) {
1552
        if (url_interrupt_cb())
1553
            return AVERROR(EINTR);
1554
        if (wait_end && wait_end - av_gettime() < 0)
1555
            return AVERROR(EAGAIN);
1556
        FD_ZERO(&rfds);
1557
        if (rt->rtsp_hd) {
1558
            tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1559
            FD_SET(tcp_fd, &rfds);
1560
        } else {
1561
            fd_max = 0;
1562
            tcp_fd = -1;
1563
        }
1564
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1565
            rtsp_st = rt->rtsp_streams[i];
1566
            if (rtsp_st->rtp_handle) {
1567
                fd = url_get_file_handle(rtsp_st->rtp_handle);
1568
                fd_rtcp = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1569
                if (FFMAX(fd, fd_rtcp) > fd_max)
1570
                    fd_max = FFMAX(fd, fd_rtcp);
1571
                FD_SET(fd, &rfds);
1572
                FD_SET(fd_rtcp, &rfds);
1573
            }
1574
        }
1575
        tv.tv_sec = 0;
1576
        tv.tv_usec = SELECT_TIMEOUT_MS * 1000;
1577
        n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1578
        if (n > 0) {
1579
            timeout_cnt = 0;
1580
            for (i = 0; i < rt->nb_rtsp_streams; i++) {
1581
                rtsp_st = rt->rtsp_streams[i];
1582
                if (rtsp_st->rtp_handle) {
1583
                    fd = url_get_file_handle(rtsp_st->rtp_handle);
1584
                    fd_rtcp = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1585
                    if (FD_ISSET(fd_rtcp, &rfds) || FD_ISSET(fd, &rfds)) {
1586
                        ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1587
                        if (ret > 0) {
1588
                            *prtsp_st = rtsp_st;
1589
                            return ret;
1590
                        }
1591
                    }
1592
                }
1593
            }
1594
#if CONFIG_RTSP_DEMUXER
1595
            if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
1596
                RTSPMessageHeader reply;
1597

    
1598
                ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1599
                if (ret < 0)
1600
                    return ret;
1601
                /* XXX: parse message */
1602
                if (rt->state != RTSP_STATE_STREAMING)
1603
                    return 0;
1604
            }
1605
#endif
1606
        } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1607
            return FF_NETERROR(ETIMEDOUT);
1608
        } else if (n < 0 && errno != EINTR)
1609
            return AVERROR(errno);
1610
    }
1611
}
1612

    
1613
int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1614
{
1615
    RTSPState *rt = s->priv_data;
1616
    int ret, len;
1617
    RTSPStream *rtsp_st, *first_queue_st = NULL;
1618
    int64_t wait_end = 0;
1619

    
1620
    if (rt->nb_byes == rt->nb_rtsp_streams)
1621
        return AVERROR_EOF;
1622

    
1623
    /* get next frames from the same RTP packet */
1624
    if (rt->cur_transport_priv) {
1625
        if (rt->transport == RTSP_TRANSPORT_RDT) {
1626
            ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1627
        } else
1628
            ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1629
        if (ret == 0) {
1630
            rt->cur_transport_priv = NULL;
1631
            return 0;
1632
        } else if (ret == 1) {
1633
            return 0;
1634
        } else
1635
            rt->cur_transport_priv = NULL;
1636
    }
1637

    
1638
    if (rt->transport == RTSP_TRANSPORT_RTP) {
1639
        int i;
1640
        int64_t first_queue_time = 0;
1641
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1642
            RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1643
            int64_t queue_time;
1644
            if (!rtpctx)
1645
                continue;
1646
            queue_time = ff_rtp_queued_packet_time(rtpctx);
1647
            if (queue_time && (queue_time - first_queue_time < 0 ||
1648
                               !first_queue_time)) {
1649
                first_queue_time = queue_time;
1650
                first_queue_st   = rt->rtsp_streams[i];
1651
            }
1652
        }
1653
        if (first_queue_time)
1654
            wait_end = first_queue_time + s->max_delay;
1655
    }
1656

    
1657
    /* read next RTP packet */
1658
 redo:
1659
    if (!rt->recvbuf) {
1660
        rt->recvbuf = av_malloc(RECVBUF_SIZE);
1661
        if (!rt->recvbuf)
1662
            return AVERROR(ENOMEM);
1663
    }
1664

    
1665
    switch(rt->lower_transport) {
1666
    default:
1667
#if CONFIG_RTSP_DEMUXER
1668
    case RTSP_LOWER_TRANSPORT_TCP:
1669
        len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
1670
        break;
1671
#endif
1672
    case RTSP_LOWER_TRANSPORT_UDP:
1673
    case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1674
        len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
1675
        if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1676
            rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1677
        break;
1678
    }
1679
    if (len == AVERROR(EAGAIN) && first_queue_st &&
1680
        rt->transport == RTSP_TRANSPORT_RTP) {
1681
        rtsp_st = first_queue_st;
1682
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
1683
        goto end;
1684
    }
1685
    if (len < 0)
1686
        return len;
1687
    if (len == 0)
1688
        return AVERROR_EOF;
1689
    if (rt->transport == RTSP_TRANSPORT_RDT) {
1690
        ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1691
    } else {
1692
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1693
        if (ret < 0) {
1694
            /* Either bad packet, or a RTCP packet. Check if the
1695
             * first_rtcp_ntp_time field was initialized. */
1696
            RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1697
            if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1698
                /* first_rtcp_ntp_time has been initialized for this stream,
1699
                 * copy the same value to all other uninitialized streams,
1700
                 * in order to map their timestamp origin to the same ntp time
1701
                 * as this one. */
1702
                int i;
1703
                AVStream *st = NULL;
1704
                if (rtsp_st->stream_index >= 0)
1705
                    st = s->streams[rtsp_st->stream_index];
1706
                for (i = 0; i < rt->nb_rtsp_streams; i++) {
1707
                    RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
1708
                    AVStream *st2 = NULL;
1709
                    if (rt->rtsp_streams[i]->stream_index >= 0)
1710
                        st2 = s->streams[rt->rtsp_streams[i]->stream_index];
1711
                    if (rtpctx2 && st && st2 &&
1712
                        rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
1713
                        rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1714
                        rtpctx2->rtcp_ts_offset = av_rescale_q(
1715
                            rtpctx->rtcp_ts_offset, st->time_base,
1716
                            st2->time_base);
1717
                    }
1718
                }
1719
            }
1720
            if (ret == -RTCP_BYE) {
1721
                rt->nb_byes++;
1722

    
1723
                av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1724
                       rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1725

    
1726
                if (rt->nb_byes == rt->nb_rtsp_streams)
1727
                    return AVERROR_EOF;
1728
            }
1729
        }
1730
    }
1731
end:
1732
    if (ret < 0)
1733
        goto redo;
1734
    if (ret == 1)
1735
        /* more packets may follow, so we save the RTP context */
1736
        rt->cur_transport_priv = rtsp_st->transport_priv;
1737

    
1738
    return ret;
1739
}
1740
#endif /* CONFIG_RTPDEC */
1741

    
1742
#if CONFIG_SDP_DEMUXER
1743
static int sdp_probe(AVProbeData *p1)
1744
{
1745
    const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1746

    
1747
    /* we look for a line beginning "c=IN IP" */
1748
    while (p < p_end && *p != '\0') {
1749
        if (p + sizeof("c=IN IP") - 1 < p_end &&
1750
            av_strstart(p, "c=IN IP", NULL))
1751
            return AVPROBE_SCORE_MAX / 2;
1752

    
1753
        while (p < p_end - 1 && *p != '\n') p++;
1754
        if (++p >= p_end)
1755
            break;
1756
        if (*p == '\r')
1757
            p++;
1758
    }
1759
    return 0;
1760
}
1761

    
1762
static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1763
{
1764
    RTSPState *rt = s->priv_data;
1765
    RTSPStream *rtsp_st;
1766
    int size, i, err;
1767
    char *content;
1768
    char url[1024];
1769

    
1770
    if (!ff_network_init())
1771
        return AVERROR(EIO);
1772

    
1773
    /* read the whole sdp file */
1774
    /* XXX: better loading */
1775
    content = av_malloc(SDP_MAX_SIZE);
1776
    size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1777
    if (size <= 0) {
1778
        av_free(content);
1779
        return AVERROR_INVALIDDATA;
1780
    }
1781
    content[size] ='\0';
1782

    
1783
    ff_sdp_parse(s, content);
1784
    av_free(content);
1785

    
1786
    /* open each RTP stream */
1787
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
1788
        char namebuf[50];
1789
        rtsp_st = rt->rtsp_streams[i];
1790

    
1791
        getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
1792
                    namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1793
        ff_url_join(url, sizeof(url), "rtp", NULL,
1794
                    namebuf, rtsp_st->sdp_port,
1795
                    "?localport=%d&ttl=%d", rtsp_st->sdp_port,
1796
                    rtsp_st->sdp_ttl);
1797
        if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1798
            err = AVERROR_INVALIDDATA;
1799
            goto fail;
1800
        }
1801
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1802
            goto fail;
1803
    }
1804
    return 0;
1805
fail:
1806
    ff_rtsp_close_streams(s);
1807
    ff_network_close();
1808
    return err;
1809
}
1810

    
1811
static int sdp_read_close(AVFormatContext *s)
1812
{
1813
    ff_rtsp_close_streams(s);
1814
    ff_network_close();
1815
    return 0;
1816
}
1817

    
1818
AVInputFormat sdp_demuxer = {
1819
    "sdp",
1820
    NULL_IF_CONFIG_SMALL("SDP"),
1821
    sizeof(RTSPState),
1822
    sdp_probe,
1823
    sdp_read_header,
1824
    ff_rtsp_fetch_packet,
1825
    sdp_read_close,
1826
};
1827
#endif /* CONFIG_SDP_DEMUXER */
1828

    
1829
#if CONFIG_RTP_DEMUXER
1830
static int rtp_probe(AVProbeData *p)
1831
{
1832
    if (av_strstart(p->filename, "rtp:", NULL))
1833
        return AVPROBE_SCORE_MAX;
1834
    return 0;
1835
}
1836

    
1837
static int rtp_read_header(AVFormatContext *s,
1838
                           AVFormatParameters *ap)
1839
{
1840
    uint8_t recvbuf[1500];
1841
    char host[500], sdp[500];
1842
    int ret, port;
1843
    URLContext* in = NULL;
1844
    int payload_type;
1845
    AVCodecContext codec;
1846
    struct sockaddr_storage addr;
1847
    ByteIOContext pb;
1848
    socklen_t addrlen = sizeof(addr);
1849

    
1850
    if (!ff_network_init())
1851
        return AVERROR(EIO);
1852

    
1853
    ret = url_open(&in, s->filename, URL_RDONLY);
1854
    if (ret)
1855
        goto fail;
1856

    
1857
    while (1) {
1858
        ret = url_read(in, recvbuf, sizeof(recvbuf));
1859
        if (ret == AVERROR(EAGAIN))
1860
            continue;
1861
        if (ret < 0)
1862
            goto fail;
1863
        if (ret < 12) {
1864
            av_log(s, AV_LOG_WARNING, "Received too short packet\n");
1865
            continue;
1866
        }
1867

    
1868
        if ((recvbuf[0] & 0xc0) != 0x80) {
1869
            av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
1870
                                      "received\n");
1871
            continue;
1872
        }
1873

    
1874
        payload_type = recvbuf[1] & 0x7f;
1875
        break;
1876
    }
1877
    getsockname(url_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
1878
    url_close(in);
1879
    in = NULL;
1880

    
1881
    memset(&codec, 0, sizeof(codec));
1882
    if (ff_rtp_get_codec_info(&codec, payload_type)) {
1883
        av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
1884
                                "without an SDP file describing it\n",
1885
                                 payload_type);
1886
        goto fail;
1887
    }
1888
    if (codec.codec_type != AVMEDIA_TYPE_DATA) {
1889
        av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
1890
                                  "properly you need an SDP file "
1891
                                  "describing it\n");
1892
    }
1893

    
1894
    av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
1895
                 NULL, 0, s->filename);
1896

    
1897
    snprintf(sdp, sizeof(sdp),
1898
             "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
1899
             addr.ss_family == AF_INET ? 4 : 6, host,
1900
             codec.codec_type == AVMEDIA_TYPE_DATA  ? "application" :
1901
             codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
1902
             port, payload_type);
1903
    av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
1904

    
1905
    init_put_byte(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
1906
    s->pb = &pb;
1907

    
1908
    /* sdp_read_header initializes this again */
1909
    ff_network_close();
1910

    
1911
    ret = sdp_read_header(s, ap);
1912
    s->pb = NULL;
1913
    return ret;
1914

    
1915
fail:
1916
    if (in)
1917
        url_close(in);
1918
    ff_network_close();
1919
    return ret;
1920
}
1921

    
1922
AVInputFormat rtp_demuxer = {
1923
    "rtp",
1924
    NULL_IF_CONFIG_SMALL("RTP input format"),
1925
    sizeof(RTSPState),
1926
    rtp_probe,
1927
    rtp_read_header,
1928
    ff_rtsp_fetch_packet,
1929
    sdp_read_close,
1930
    .flags = AVFMT_NOFILE,
1931
};
1932
#endif /* CONFIG_RTP_DEMUXER */
1933