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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
void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
688
                        HTTPAuthState *auth_state)
689
{
690
    const char *p;
691

    
692
    /* NOTE: we do case independent match for broken servers */
693
    p = buf;
694
    if (av_stristart(p, "Session:", &p)) {
695
        int t;
696
        get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
697
        if (av_stristart(p, ";timeout=", &p) &&
698
            (t = strtol(p, NULL, 10)) > 0) {
699
            reply->timeout = t;
700
        }
701
    } else if (av_stristart(p, "Content-Length:", &p)) {
702
        reply->content_length = strtol(p, NULL, 10);
703
    } else if (av_stristart(p, "Transport:", &p)) {
704
        rtsp_parse_transport(reply, p);
705
    } else if (av_stristart(p, "CSeq:", &p)) {
706
        reply->seq = strtol(p, NULL, 10);
707
    } else if (av_stristart(p, "Range:", &p)) {
708
        rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
709
    } else if (av_stristart(p, "RealChallenge1:", &p)) {
710
        p += strspn(p, SPACE_CHARS);
711
        av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
712
    } else if (av_stristart(p, "Server:", &p)) {
713
        p += strspn(p, SPACE_CHARS);
714
        av_strlcpy(reply->server, p, sizeof(reply->server));
715
    } else if (av_stristart(p, "Notice:", &p) ||
716
               av_stristart(p, "X-Notice:", &p)) {
717
        reply->notice = strtol(p, NULL, 10);
718
    } else if (av_stristart(p, "Location:", &p)) {
719
        p += strspn(p, SPACE_CHARS);
720
        av_strlcpy(reply->location, p , sizeof(reply->location));
721
    } else if (av_stristart(p, "WWW-Authenticate:", &p) && auth_state) {
722
        p += strspn(p, SPACE_CHARS);
723
        ff_http_auth_handle_header(auth_state, "WWW-Authenticate", p);
724
    } else if (av_stristart(p, "Authentication-Info:", &p) && auth_state) {
725
        p += strspn(p, SPACE_CHARS);
726
        ff_http_auth_handle_header(auth_state, "Authentication-Info", p);
727
    } else if (av_stristart(p, "Content-Base:", &p)) {
728
        p += strspn(p, SPACE_CHARS);
729
        av_strlcpy(reply->content_base, p , sizeof(reply->content_base));
730
    }
731
}
732

    
733
/* skip a RTP/TCP interleaved packet */
734
void ff_rtsp_skip_packet(AVFormatContext *s)
735
{
736
    RTSPState *rt = s->priv_data;
737
    int ret, len, len1;
738
    uint8_t buf[1024];
739

    
740
    ret = url_read_complete(rt->rtsp_hd, buf, 3);
741
    if (ret != 3)
742
        return;
743
    len = AV_RB16(buf + 1);
744

    
745
    dprintf(s, "skipping RTP packet len=%d\n", len);
746

    
747
    /* skip payload */
748
    while (len > 0) {
749
        len1 = len;
750
        if (len1 > sizeof(buf))
751
            len1 = sizeof(buf);
752
        ret = url_read_complete(rt->rtsp_hd, buf, len1);
753
        if (ret != len1)
754
            return;
755
        len -= len1;
756
    }
757
}
758

    
759
int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
760
                       unsigned char **content_ptr,
761
                       int return_on_interleaved_data)
762
{
763
    RTSPState *rt = s->priv_data;
764
    char buf[4096], buf1[1024], *q;
765
    unsigned char ch;
766
    const char *p;
767
    int ret, content_length, line_count = 0;
768
    unsigned char *content = NULL;
769

    
770
    memset(reply, 0, sizeof(*reply));
771

    
772
    /* parse reply (XXX: use buffers) */
773
    rt->last_reply[0] = '\0';
774
    for (;;) {
775
        q = buf;
776
        for (;;) {
777
            ret = url_read_complete(rt->rtsp_hd, &ch, 1);
778
#ifdef DEBUG_RTP_TCP
779
            dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
780
#endif
781
            if (ret != 1)
782
                return AVERROR_EOF;
783
            if (ch == '\n')
784
                break;
785
            if (ch == '$') {
786
                /* XXX: only parse it if first char on line ? */
787
                if (return_on_interleaved_data) {
788
                    return 1;
789
                } else
790
                    ff_rtsp_skip_packet(s);
791
            } else if (ch != '\r') {
792
                if ((q - buf) < sizeof(buf) - 1)
793
                    *q++ = ch;
794
            }
795
        }
796
        *q = '\0';
797

    
798
        dprintf(s, "line='%s'\n", buf);
799

    
800
        /* test if last line */
801
        if (buf[0] == '\0')
802
            break;
803
        p = buf;
804
        if (line_count == 0) {
805
            /* get reply code */
806
            get_word(buf1, sizeof(buf1), &p);
807
            get_word(buf1, sizeof(buf1), &p);
808
            reply->status_code = atoi(buf1);
809
            av_strlcpy(reply->reason, p, sizeof(reply->reason));
810
        } else {
811
            ff_rtsp_parse_line(reply, p, &rt->auth_state);
812
            av_strlcat(rt->last_reply, p,    sizeof(rt->last_reply));
813
            av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
814
        }
815
        line_count++;
816
    }
817

    
818
    if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
819
        av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
820

    
821
    content_length = reply->content_length;
822
    if (content_length > 0) {
823
        /* leave some room for a trailing '\0' (useful for simple parsing) */
824
        content = av_malloc(content_length + 1);
825
        (void)url_read_complete(rt->rtsp_hd, content, content_length);
826
        content[content_length] = '\0';
827
    }
828
    if (content_ptr)
829
        *content_ptr = content;
830
    else
831
        av_free(content);
832

    
833
    if (rt->seq != reply->seq) {
834
        av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
835
            rt->seq, reply->seq);
836
    }
837

    
838
    /* EOS */
839
    if (reply->notice == 2101 /* End-of-Stream Reached */      ||
840
        reply->notice == 2104 /* Start-of-Stream Reached */    ||
841
        reply->notice == 2306 /* Continuous Feed Terminated */) {
842
        rt->state = RTSP_STATE_IDLE;
843
    } else if (reply->notice >= 4400 && reply->notice < 5500) {
844
        return AVERROR(EIO); /* data or server error */
845
    } else if (reply->notice == 2401 /* Ticket Expired */ ||
846
             (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
847
        return AVERROR(EPERM);
848

    
849
    return 0;
850
}
851

    
852
int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
853
                                        const char *method, const char *url,
854
                                        const char *headers,
855
                                        const unsigned char *send_content,
856
                                        int send_content_length)
857
{
858
    RTSPState *rt = s->priv_data;
859
    char buf[4096], *out_buf;
860
    char base64buf[AV_BASE64_SIZE(sizeof(buf))];
861

    
862
    /* Add in RTSP headers */
863
    out_buf = buf;
864
    rt->seq++;
865
    snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
866
    if (headers)
867
        av_strlcat(buf, headers, sizeof(buf));
868
    av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
869
    if (rt->session_id[0] != '\0' && (!headers ||
870
        !strstr(headers, "\nIf-Match:"))) {
871
        av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
872
    }
873
    if (rt->auth[0]) {
874
        char *str = ff_http_auth_create_response(&rt->auth_state,
875
                                                 rt->auth, url, method);
876
        if (str)
877
            av_strlcat(buf, str, sizeof(buf));
878
        av_free(str);
879
    }
880
    if (send_content_length > 0 && send_content)
881
        av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
882
    av_strlcat(buf, "\r\n", sizeof(buf));
883

    
884
    /* base64 encode rtsp if tunneling */
885
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
886
        av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
887
        out_buf = base64buf;
888
    }
889

    
890
    dprintf(s, "Sending:\n%s--\n", buf);
891

    
892
    url_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
893
    if (send_content_length > 0 && send_content) {
894
        if (rt->control_transport == RTSP_MODE_TUNNEL) {
895
            av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
896
                                    "with content data not supported\n");
897
            return AVERROR_PATCHWELCOME;
898
        }
899
        url_write(rt->rtsp_hd_out, send_content, send_content_length);
900
    }
901
    rt->last_cmd_time = av_gettime();
902

    
903
    return 0;
904
}
905

    
906
int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
907
                           const char *url, const char *headers)
908
{
909
    return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
910
}
911

    
912
int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
913
                     const char *headers, RTSPMessageHeader *reply,
914
                     unsigned char **content_ptr)
915
{
916
    return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
917
                                         content_ptr, NULL, 0);
918
}
919

    
920
int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
921
                                  const char *method, const char *url,
922
                                  const char *header,
923
                                  RTSPMessageHeader *reply,
924
                                  unsigned char **content_ptr,
925
                                  const unsigned char *send_content,
926
                                  int send_content_length)
927
{
928
    RTSPState *rt = s->priv_data;
929
    HTTPAuthType cur_auth_type;
930
    int ret;
931

    
932
retry:
933
    cur_auth_type = rt->auth_state.auth_type;
934
    if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
935
                                                   send_content,
936
                                                   send_content_length)))
937
        return ret;
938

    
939
    if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0) ) < 0)
940
        return ret;
941

    
942
    if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
943
        rt->auth_state.auth_type != HTTP_AUTH_NONE)
944
        goto retry;
945

    
946
    if (reply->status_code > 400){
947
        av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
948
               method,
949
               reply->status_code,
950
               reply->reason);
951
        av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
952
    }
953

    
954
    return 0;
955
}
956

    
957
/**
958
 * @return 0 on success, <0 on error, 1 if protocol is unavailable.
959
 */
960
static int make_setup_request(AVFormatContext *s, const char *host, int port,
961
                              int lower_transport, const char *real_challenge)
962
{
963
    RTSPState *rt = s->priv_data;
964
    int rtx, j, i, err, interleave = 0;
965
    RTSPStream *rtsp_st;
966
    RTSPMessageHeader reply1, *reply = &reply1;
967
    char cmd[2048];
968
    const char *trans_pref;
969

    
970
    if (rt->transport == RTSP_TRANSPORT_RDT)
971
        trans_pref = "x-pn-tng";
972
    else
973
        trans_pref = "RTP/AVP";
974

    
975
    /* default timeout: 1 minute */
976
    rt->timeout = 60;
977

    
978
    /* for each stream, make the setup request */
979
    /* XXX: we assume the same server is used for the control of each
980
     * RTSP stream */
981

    
982
    for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
983
        char transport[2048];
984

    
985
        /**
986
         * WMS serves all UDP data over a single connection, the RTX, which
987
         * isn't necessarily the first in the SDP but has to be the first
988
         * to be set up, else the second/third SETUP will fail with a 461.
989
         */
990
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
991
             rt->server_type == RTSP_SERVER_WMS) {
992
            if (i == 0) {
993
                /* rtx first */
994
                for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
995
                    int len = strlen(rt->rtsp_streams[rtx]->control_url);
996
                    if (len >= 4 &&
997
                        !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
998
                                "/rtx"))
999
                        break;
1000
                }
1001
                if (rtx == rt->nb_rtsp_streams)
1002
                    return -1; /* no RTX found */
1003
                rtsp_st = rt->rtsp_streams[rtx];
1004
            } else
1005
                rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1006
        } else
1007
            rtsp_st = rt->rtsp_streams[i];
1008

    
1009
        /* RTP/UDP */
1010
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1011
            char buf[256];
1012

    
1013
            if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1014
                port = reply->transports[0].client_port_min;
1015
                goto have_port;
1016
            }
1017

    
1018
            /* first try in specified port range */
1019
            if (RTSP_RTP_PORT_MIN != 0) {
1020
                while (j <= RTSP_RTP_PORT_MAX) {
1021
                    ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1022
                                "?localport=%d", j);
1023
                    /* we will use two ports per rtp stream (rtp and rtcp) */
1024
                    j += 2;
1025
                    if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1026
                        goto rtp_opened;
1027
                }
1028
            }
1029

    
1030
#if 0
1031
            /* then try on any port */
1032
            if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1033
                err = AVERROR_INVALIDDATA;
1034
                goto fail;
1035
            }
1036
#endif
1037

    
1038
        rtp_opened:
1039
            port = rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1040
        have_port:
1041
            snprintf(transport, sizeof(transport) - 1,
1042
                     "%s/UDP;", trans_pref);
1043
            if (rt->server_type != RTSP_SERVER_REAL)
1044
                av_strlcat(transport, "unicast;", sizeof(transport));
1045
            av_strlcatf(transport, sizeof(transport),
1046
                     "client_port=%d", port);
1047
            if (rt->transport == RTSP_TRANSPORT_RTP &&
1048
                !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1049
                av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1050
        }
1051

    
1052
        /* RTP/TCP */
1053
        else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1054
            /** For WMS streams, the application streams are only used for
1055
             * UDP. When trying to set it up for TCP streams, the server
1056
             * will return an error. Therefore, we skip those streams. */
1057
            if (rt->server_type == RTSP_SERVER_WMS &&
1058
                s->streams[rtsp_st->stream_index]->codec->codec_type ==
1059
                    AVMEDIA_TYPE_DATA)
1060
                continue;
1061
            snprintf(transport, sizeof(transport) - 1,
1062
                     "%s/TCP;", trans_pref);
1063
            if (rt->server_type == RTSP_SERVER_WMS)
1064
                av_strlcat(transport, "unicast;", sizeof(transport));
1065
            av_strlcatf(transport, sizeof(transport),
1066
                        "interleaved=%d-%d",
1067
                        interleave, interleave + 1);
1068
            interleave += 2;
1069
        }
1070

    
1071
        else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1072
            snprintf(transport, sizeof(transport) - 1,
1073
                     "%s/UDP;multicast", trans_pref);
1074
        }
1075
        if (s->oformat) {
1076
            av_strlcat(transport, ";mode=receive", sizeof(transport));
1077
        } else if (rt->server_type == RTSP_SERVER_REAL ||
1078
                   rt->server_type == RTSP_SERVER_WMS)
1079
            av_strlcat(transport, ";mode=play", sizeof(transport));
1080
        snprintf(cmd, sizeof(cmd),
1081
                 "Transport: %s\r\n",
1082
                 transport);
1083
        if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1084
            char real_res[41], real_csum[9];
1085
            ff_rdt_calc_response_and_checksum(real_res, real_csum,
1086
                                              real_challenge);
1087
            av_strlcatf(cmd, sizeof(cmd),
1088
                        "If-Match: %s\r\n"
1089
                        "RealChallenge2: %s, sd=%s\r\n",
1090
                        rt->session_id, real_res, real_csum);
1091
        }
1092
        ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1093
        if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1094
            err = 1;
1095
            goto fail;
1096
        } else if (reply->status_code != RTSP_STATUS_OK ||
1097
                   reply->nb_transports != 1) {
1098
            err = AVERROR_INVALIDDATA;
1099
            goto fail;
1100
        }
1101

    
1102
        /* XXX: same protocol for all streams is required */
1103
        if (i > 0) {
1104
            if (reply->transports[0].lower_transport != rt->lower_transport ||
1105
                reply->transports[0].transport != rt->transport) {
1106
                err = AVERROR_INVALIDDATA;
1107
                goto fail;
1108
            }
1109
        } else {
1110
            rt->lower_transport = reply->transports[0].lower_transport;
1111
            rt->transport = reply->transports[0].transport;
1112
        }
1113

    
1114
        /* Fail if the server responded with another lower transport mode
1115
         * than what we requested. */
1116
        if (reply->transports[0].lower_transport != lower_transport) {
1117
            av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1118
            err = AVERROR_INVALIDDATA;
1119
            goto fail;
1120
        }
1121

    
1122
        switch(reply->transports[0].lower_transport) {
1123
        case RTSP_LOWER_TRANSPORT_TCP:
1124
            rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1125
            rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1126
            break;
1127

    
1128
        case RTSP_LOWER_TRANSPORT_UDP: {
1129
            char url[1024];
1130

    
1131
            /* Use source address if specified */
1132
            if (reply->transports[0].source[0]) {
1133
                ff_url_join(url, sizeof(url), "rtp", NULL,
1134
                            reply->transports[0].source,
1135
                            reply->transports[0].server_port_min, NULL);
1136
            } else {
1137
                ff_url_join(url, sizeof(url), "rtp", NULL, host,
1138
                            reply->transports[0].server_port_min, NULL);
1139
            }
1140
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1141
                rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1142
                err = AVERROR_INVALIDDATA;
1143
                goto fail;
1144
            }
1145
            /* Try to initialize the connection state in a
1146
             * potential NAT router by sending dummy packets.
1147
             * RTP/RTCP dummy packets are used for RDT, too.
1148
             */
1149
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1150
                CONFIG_RTPDEC)
1151
                rtp_send_punch_packets(rtsp_st->rtp_handle);
1152
            break;
1153
        }
1154
        case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1155
            char url[1024], namebuf[50];
1156
            struct sockaddr_storage addr;
1157
            int port, ttl;
1158

    
1159
            if (reply->transports[0].destination.ss_family) {
1160
                addr      = reply->transports[0].destination;
1161
                port      = reply->transports[0].port_min;
1162
                ttl       = reply->transports[0].ttl;
1163
            } else {
1164
                addr      = rtsp_st->sdp_ip;
1165
                port      = rtsp_st->sdp_port;
1166
                ttl       = rtsp_st->sdp_ttl;
1167
            }
1168
            getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1169
                        namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1170
            ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1171
                        port, "?ttl=%d", ttl);
1172
            if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1173
                err = AVERROR_INVALIDDATA;
1174
                goto fail;
1175
            }
1176
            break;
1177
        }
1178
        }
1179

    
1180
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1181
            goto fail;
1182
    }
1183

    
1184
    if (reply->timeout > 0)
1185
        rt->timeout = reply->timeout;
1186

    
1187
    if (rt->server_type == RTSP_SERVER_REAL)
1188
        rt->need_subscription = 1;
1189

    
1190
    return 0;
1191

    
1192
fail:
1193
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
1194
        if (rt->rtsp_streams[i]->rtp_handle) {
1195
            url_close(rt->rtsp_streams[i]->rtp_handle);
1196
            rt->rtsp_streams[i]->rtp_handle = NULL;
1197
        }
1198
    }
1199
    return err;
1200
}
1201

    
1202
void ff_rtsp_close_connections(AVFormatContext *s)
1203
{
1204
    RTSPState *rt = s->priv_data;
1205
    if (rt->rtsp_hd_out != rt->rtsp_hd) url_close(rt->rtsp_hd_out);
1206
    url_close(rt->rtsp_hd);
1207
    rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1208
}
1209

    
1210
int ff_rtsp_connect(AVFormatContext *s)
1211
{
1212
    RTSPState *rt = s->priv_data;
1213
    char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1214
    char *option_list, *option, *filename;
1215
    int port, err, tcp_fd;
1216
    RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1217
    int lower_transport_mask = 0;
1218
    char real_challenge[64];
1219
    struct sockaddr_storage peer;
1220
    socklen_t peer_len = sizeof(peer);
1221

    
1222
    if (!ff_network_init())
1223
        return AVERROR(EIO);
1224
redirect:
1225
    rt->control_transport = RTSP_MODE_PLAIN;
1226
    /* extract hostname and port */
1227
    av_url_split(NULL, 0, auth, sizeof(auth),
1228
                 host, sizeof(host), &port, path, sizeof(path), s->filename);
1229
    if (*auth) {
1230
        av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1231
    }
1232
    if (port < 0)
1233
        port = RTSP_DEFAULT_PORT;
1234

    
1235
    /* search for options */
1236
    option_list = strrchr(path, '?');
1237
    if (option_list) {
1238
        /* Strip out the RTSP specific options, write out the rest of
1239
         * the options back into the same string. */
1240
        filename = option_list;
1241
        while (option_list) {
1242
            /* move the option pointer */
1243
            option = ++option_list;
1244
            option_list = strchr(option_list, '&');
1245
            if (option_list)
1246
                *option_list = 0;
1247

    
1248
            /* handle the options */
1249
            if (!strcmp(option, "udp")) {
1250
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
1251
            } else if (!strcmp(option, "multicast")) {
1252
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1253
            } else if (!strcmp(option, "tcp")) {
1254
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1255
            } else if(!strcmp(option, "http")) {
1256
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1257
                rt->control_transport = RTSP_MODE_TUNNEL;
1258
            } else {
1259
                /* Write options back into the buffer, using memmove instead
1260
                 * of strcpy since the strings may overlap. */
1261
                int len = strlen(option);
1262
                memmove(++filename, option, len);
1263
                filename += len;
1264
                if (option_list) *filename = '&';
1265
            }
1266
        }
1267
        *filename = 0;
1268
    }
1269

    
1270
    if (!lower_transport_mask)
1271
        lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1272

    
1273
    if (s->oformat) {
1274
        /* Only UDP or TCP - UDP multicast isn't supported. */
1275
        lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1276
                                (1 << RTSP_LOWER_TRANSPORT_TCP);
1277
        if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1278
            av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1279
                                    "only UDP and TCP are supported for output.\n");
1280
            err = AVERROR(EINVAL);
1281
            goto fail;
1282
        }
1283
    }
1284

    
1285
    /* Construct the URI used in request; this is similar to s->filename,
1286
     * but with authentication credentials removed and RTSP specific options
1287
     * stripped out. */
1288
    ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1289
                host, port, "%s", path);
1290

    
1291
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
1292
        /* set up initial handshake for tunneling */
1293
        char httpname[1024];
1294
        char sessioncookie[17];
1295
        char headers[1024];
1296

    
1297
        ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1298
        snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1299
                 av_get_random_seed(), av_get_random_seed());
1300

    
1301
        /* GET requests */
1302
        if (url_alloc(&rt->rtsp_hd, httpname, URL_RDONLY) < 0) {
1303
            err = AVERROR(EIO);
1304
            goto fail;
1305
        }
1306

    
1307
        /* generate GET headers */
1308
        snprintf(headers, sizeof(headers),
1309
                 "x-sessioncookie: %s\r\n"
1310
                 "Accept: application/x-rtsp-tunnelled\r\n"
1311
                 "Pragma: no-cache\r\n"
1312
                 "Cache-Control: no-cache\r\n",
1313
                 sessioncookie);
1314
        ff_http_set_headers(rt->rtsp_hd, headers);
1315

    
1316
        /* complete the connection */
1317
        if (url_connect(rt->rtsp_hd)) {
1318
            err = AVERROR(EIO);
1319
            goto fail;
1320
        }
1321

    
1322
        /* POST requests */
1323
        if (url_alloc(&rt->rtsp_hd_out, httpname, URL_WRONLY) < 0 ) {
1324
            err = AVERROR(EIO);
1325
            goto fail;
1326
        }
1327

    
1328
        /* generate POST headers */
1329
        snprintf(headers, sizeof(headers),
1330
                 "x-sessioncookie: %s\r\n"
1331
                 "Content-Type: application/x-rtsp-tunnelled\r\n"
1332
                 "Pragma: no-cache\r\n"
1333
                 "Cache-Control: no-cache\r\n"
1334
                 "Content-Length: 32767\r\n"
1335
                 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1336
                 sessioncookie);
1337
        ff_http_set_headers(rt->rtsp_hd_out, headers);
1338
        ff_http_set_chunked_transfer_encoding(rt->rtsp_hd_out, 0);
1339

    
1340
        /* Initialize the authentication state for the POST session. The HTTP
1341
         * protocol implementation doesn't properly handle multi-pass
1342
         * authentication for POST requests, since it would require one of
1343
         * the following:
1344
         * - implementing Expect: 100-continue, which many HTTP servers
1345
         *   don't support anyway, even less the RTSP servers that do HTTP
1346
         *   tunneling
1347
         * - sending the whole POST data until getting a 401 reply specifying
1348
         *   what authentication method to use, then resending all that data
1349
         * - waiting for potential 401 replies directly after sending the
1350
         *   POST header (waiting for some unspecified time)
1351
         * Therefore, we copy the full auth state, which works for both basic
1352
         * and digest. (For digest, we would have to synchronize the nonce
1353
         * count variable between the two sessions, if we'd do more requests
1354
         * with the original session, though.)
1355
         */
1356
        ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1357

    
1358
        /* complete the connection */
1359
        if (url_connect(rt->rtsp_hd_out)) {
1360
            err = AVERROR(EIO);
1361
            goto fail;
1362
        }
1363
    } else {
1364
        /* open the tcp connection */
1365
        ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1366
        if (url_open(&rt->rtsp_hd, tcpname, URL_RDWR) < 0) {
1367
            err = AVERROR(EIO);
1368
            goto fail;
1369
        }
1370
        rt->rtsp_hd_out = rt->rtsp_hd;
1371
    }
1372
    rt->seq = 0;
1373

    
1374
    tcp_fd = url_get_file_handle(rt->rtsp_hd);
1375
    if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1376
        getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1377
                    NULL, 0, NI_NUMERICHOST);
1378
    }
1379

    
1380
    /* request options supported by the server; this also detects server
1381
     * type */
1382
    for (rt->server_type = RTSP_SERVER_RTP;;) {
1383
        cmd[0] = 0;
1384
        if (rt->server_type == RTSP_SERVER_REAL)
1385
            av_strlcat(cmd,
1386
                       /**
1387
                        * The following entries are required for proper
1388
                        * streaming from a Realmedia server. They are
1389
                        * interdependent in some way although we currently
1390
                        * don't quite understand how. Values were copied
1391
                        * from mplayer SVN r23589.
1392
                        * @param CompanyID is a 16-byte ID in base64
1393
                        * @param ClientChallenge is a 16-byte ID in hex
1394
                        */
1395
                       "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1396
                       "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1397
                       "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1398
                       "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1399
                       sizeof(cmd));
1400
        ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1401
        if (reply->status_code != RTSP_STATUS_OK) {
1402
            err = AVERROR_INVALIDDATA;
1403
            goto fail;
1404
        }
1405

    
1406
        /* detect server type if not standard-compliant RTP */
1407
        if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1408
            rt->server_type = RTSP_SERVER_REAL;
1409
            continue;
1410
        } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1411
            rt->server_type = RTSP_SERVER_WMS;
1412
        } else if (rt->server_type == RTSP_SERVER_REAL)
1413
            strcpy(real_challenge, reply->real_challenge);
1414
        break;
1415
    }
1416

    
1417
    if (s->iformat && CONFIG_RTSP_DEMUXER)
1418
        err = ff_rtsp_setup_input_streams(s, reply);
1419
    else if (CONFIG_RTSP_MUXER)
1420
        err = ff_rtsp_setup_output_streams(s, host);
1421
    if (err)
1422
        goto fail;
1423

    
1424
    do {
1425
        int lower_transport = ff_log2_tab[lower_transport_mask &
1426
                                  ~(lower_transport_mask - 1)];
1427

    
1428
        err = make_setup_request(s, host, port, lower_transport,
1429
                                 rt->server_type == RTSP_SERVER_REAL ?
1430
                                     real_challenge : NULL);
1431
        if (err < 0)
1432
            goto fail;
1433
        lower_transport_mask &= ~(1 << lower_transport);
1434
        if (lower_transport_mask == 0 && err == 1) {
1435
            err = FF_NETERROR(EPROTONOSUPPORT);
1436
            goto fail;
1437
        }
1438
    } while (err);
1439

    
1440
    rt->state = RTSP_STATE_IDLE;
1441
    rt->seek_timestamp = 0; /* default is to start stream at position zero */
1442
    return 0;
1443
 fail:
1444
    ff_rtsp_close_streams(s);
1445
    ff_rtsp_close_connections(s);
1446
    if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1447
        av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1448
        av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1449
               reply->status_code,
1450
               s->filename);
1451
        goto redirect;
1452
    }
1453
    ff_network_close();
1454
    return err;
1455
}
1456
#endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1457

    
1458
#if CONFIG_RTPDEC
1459
static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1460
                           uint8_t *buf, int buf_size, int64_t wait_end)
1461
{
1462
    RTSPState *rt = s->priv_data;
1463
    RTSPStream *rtsp_st;
1464
    fd_set rfds;
1465
    int fd, fd_rtcp, fd_max, n, i, ret, tcp_fd, timeout_cnt = 0;
1466
    struct timeval tv;
1467

    
1468
    for (;;) {
1469
        if (url_interrupt_cb())
1470
            return AVERROR(EINTR);
1471
        if (wait_end && wait_end - av_gettime() < 0)
1472
            return AVERROR(EAGAIN);
1473
        FD_ZERO(&rfds);
1474
        if (rt->rtsp_hd) {
1475
            tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1476
            FD_SET(tcp_fd, &rfds);
1477
        } else {
1478
            fd_max = 0;
1479
            tcp_fd = -1;
1480
        }
1481
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1482
            rtsp_st = rt->rtsp_streams[i];
1483
            if (rtsp_st->rtp_handle) {
1484
                fd = url_get_file_handle(rtsp_st->rtp_handle);
1485
                fd_rtcp = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1486
                if (FFMAX(fd, fd_rtcp) > fd_max)
1487
                    fd_max = FFMAX(fd, fd_rtcp);
1488
                FD_SET(fd, &rfds);
1489
                FD_SET(fd_rtcp, &rfds);
1490
            }
1491
        }
1492
        tv.tv_sec = 0;
1493
        tv.tv_usec = SELECT_TIMEOUT_MS * 1000;
1494
        n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1495
        if (n > 0) {
1496
            timeout_cnt = 0;
1497
            for (i = 0; i < rt->nb_rtsp_streams; i++) {
1498
                rtsp_st = rt->rtsp_streams[i];
1499
                if (rtsp_st->rtp_handle) {
1500
                    fd = url_get_file_handle(rtsp_st->rtp_handle);
1501
                    fd_rtcp = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1502
                    if (FD_ISSET(fd_rtcp, &rfds) || FD_ISSET(fd, &rfds)) {
1503
                        ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1504
                        if (ret > 0) {
1505
                            *prtsp_st = rtsp_st;
1506
                            return ret;
1507
                        }
1508
                    }
1509
                }
1510
            }
1511
#if CONFIG_RTSP_DEMUXER
1512
            if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
1513
                RTSPMessageHeader reply;
1514

    
1515
                ret = ff_rtsp_read_reply(s, &reply, NULL, 0);
1516
                if (ret < 0)
1517
                    return ret;
1518
                /* XXX: parse message */
1519
                if (rt->state != RTSP_STATE_STREAMING)
1520
                    return 0;
1521
            }
1522
#endif
1523
        } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1524
            return FF_NETERROR(ETIMEDOUT);
1525
        } else if (n < 0 && errno != EINTR)
1526
            return AVERROR(errno);
1527
    }
1528
}
1529

    
1530
int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1531
{
1532
    RTSPState *rt = s->priv_data;
1533
    int ret, len;
1534
    RTSPStream *rtsp_st, *first_queue_st = NULL;
1535
    int64_t wait_end = 0;
1536

    
1537
    if (rt->nb_byes == rt->nb_rtsp_streams)
1538
        return AVERROR_EOF;
1539

    
1540
    /* get next frames from the same RTP packet */
1541
    if (rt->cur_transport_priv) {
1542
        if (rt->transport == RTSP_TRANSPORT_RDT) {
1543
            ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1544
        } else
1545
            ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1546
        if (ret == 0) {
1547
            rt->cur_transport_priv = NULL;
1548
            return 0;
1549
        } else if (ret == 1) {
1550
            return 0;
1551
        } else
1552
            rt->cur_transport_priv = NULL;
1553
    }
1554

    
1555
    if (rt->transport == RTSP_TRANSPORT_RTP) {
1556
        int i;
1557
        int64_t first_queue_time = 0;
1558
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1559
            RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1560
            int64_t queue_time = ff_rtp_queued_packet_time(rtpctx);
1561
            if (queue_time && (queue_time - first_queue_time < 0 ||
1562
                               !first_queue_time)) {
1563
                first_queue_time = queue_time;
1564
                first_queue_st   = rt->rtsp_streams[i];
1565
            }
1566
        }
1567
        if (first_queue_time)
1568
            wait_end = first_queue_time + s->max_delay;
1569
    }
1570

    
1571
    /* read next RTP packet */
1572
 redo:
1573
    if (!rt->recvbuf) {
1574
        rt->recvbuf = av_malloc(RECVBUF_SIZE);
1575
        if (!rt->recvbuf)
1576
            return AVERROR(ENOMEM);
1577
    }
1578

    
1579
    switch(rt->lower_transport) {
1580
    default:
1581
#if CONFIG_RTSP_DEMUXER
1582
    case RTSP_LOWER_TRANSPORT_TCP:
1583
        len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
1584
        break;
1585
#endif
1586
    case RTSP_LOWER_TRANSPORT_UDP:
1587
    case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1588
        len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
1589
        if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1590
            rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1591
        break;
1592
    }
1593
    if (len == AVERROR(EAGAIN) && first_queue_st &&
1594
        rt->transport == RTSP_TRANSPORT_RTP) {
1595
        rtsp_st = first_queue_st;
1596
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
1597
        goto end;
1598
    }
1599
    if (len < 0)
1600
        return len;
1601
    if (len == 0)
1602
        return AVERROR_EOF;
1603
    if (rt->transport == RTSP_TRANSPORT_RDT) {
1604
        ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1605
    } else {
1606
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1607
        if (ret < 0) {
1608
            /* Either bad packet, or a RTCP packet. Check if the
1609
             * first_rtcp_ntp_time field was initialized. */
1610
            RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1611
            if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1612
                /* first_rtcp_ntp_time has been initialized for this stream,
1613
                 * copy the same value to all other uninitialized streams,
1614
                 * in order to map their timestamp origin to the same ntp time
1615
                 * as this one. */
1616
                int i;
1617
                for (i = 0; i < rt->nb_rtsp_streams; i++) {
1618
                    RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
1619
                    if (rtpctx2 &&
1620
                        rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE)
1621
                        rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1622
                }
1623
            }
1624
            if (ret == -RTCP_BYE) {
1625
                rt->nb_byes++;
1626

    
1627
                av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1628
                       rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1629

    
1630
                if (rt->nb_byes == rt->nb_rtsp_streams)
1631
                    return AVERROR_EOF;
1632
            }
1633
        }
1634
    }
1635
end:
1636
    if (ret < 0)
1637
        goto redo;
1638
    if (ret == 1)
1639
        /* more packets may follow, so we save the RTP context */
1640
        rt->cur_transport_priv = rtsp_st->transport_priv;
1641

    
1642
    return ret;
1643
}
1644
#endif /* CONFIG_RTPDEC */
1645

    
1646
#if CONFIG_SDP_DEMUXER
1647
static int sdp_probe(AVProbeData *p1)
1648
{
1649
    const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1650

    
1651
    /* we look for a line beginning "c=IN IP" */
1652
    while (p < p_end && *p != '\0') {
1653
        if (p + sizeof("c=IN IP") - 1 < p_end &&
1654
            av_strstart(p, "c=IN IP", NULL))
1655
            return AVPROBE_SCORE_MAX / 2;
1656

    
1657
        while (p < p_end - 1 && *p != '\n') p++;
1658
        if (++p >= p_end)
1659
            break;
1660
        if (*p == '\r')
1661
            p++;
1662
    }
1663
    return 0;
1664
}
1665

    
1666
static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1667
{
1668
    RTSPState *rt = s->priv_data;
1669
    RTSPStream *rtsp_st;
1670
    int size, i, err;
1671
    char *content;
1672
    char url[1024];
1673

    
1674
    if (!ff_network_init())
1675
        return AVERROR(EIO);
1676

    
1677
    /* read the whole sdp file */
1678
    /* XXX: better loading */
1679
    content = av_malloc(SDP_MAX_SIZE);
1680
    size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1681
    if (size <= 0) {
1682
        av_free(content);
1683
        return AVERROR_INVALIDDATA;
1684
    }
1685
    content[size] ='\0';
1686

    
1687
    ff_sdp_parse(s, content);
1688
    av_free(content);
1689

    
1690
    /* open each RTP stream */
1691
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
1692
        char namebuf[50];
1693
        rtsp_st = rt->rtsp_streams[i];
1694

    
1695
        getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
1696
                    namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1697
        ff_url_join(url, sizeof(url), "rtp", NULL,
1698
                    namebuf, rtsp_st->sdp_port,
1699
                    "?localport=%d&ttl=%d", rtsp_st->sdp_port,
1700
                    rtsp_st->sdp_ttl);
1701
        if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1702
            err = AVERROR_INVALIDDATA;
1703
            goto fail;
1704
        }
1705
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1706
            goto fail;
1707
    }
1708
    return 0;
1709
fail:
1710
    ff_rtsp_close_streams(s);
1711
    ff_network_close();
1712
    return err;
1713
}
1714

    
1715
static int sdp_read_close(AVFormatContext *s)
1716
{
1717
    ff_rtsp_close_streams(s);
1718
    ff_network_close();
1719
    return 0;
1720
}
1721

    
1722
AVInputFormat sdp_demuxer = {
1723
    "sdp",
1724
    NULL_IF_CONFIG_SMALL("SDP"),
1725
    sizeof(RTSPState),
1726
    sdp_probe,
1727
    sdp_read_header,
1728
    ff_rtsp_fetch_packet,
1729
    sdp_read_close,
1730
};
1731
#endif /* CONFIG_SDP_DEMUXER */
1732

    
1733
#if CONFIG_RTP_DEMUXER
1734
static int rtp_probe(AVProbeData *p)
1735
{
1736
    if (av_strstart(p->filename, "rtp:", NULL))
1737
        return AVPROBE_SCORE_MAX;
1738
    return 0;
1739
}
1740

    
1741
static int rtp_read_header(AVFormatContext *s,
1742
                           AVFormatParameters *ap)
1743
{
1744
    uint8_t recvbuf[1500];
1745
    char host[500], sdp[500];
1746
    int ret, port;
1747
    URLContext* in = NULL;
1748
    int payload_type;
1749
    AVCodecContext codec;
1750
    struct sockaddr_storage addr;
1751
    ByteIOContext pb;
1752
    socklen_t addrlen = sizeof(addr);
1753

    
1754
    if (!ff_network_init())
1755
        return AVERROR(EIO);
1756

    
1757
    ret = url_open(&in, s->filename, URL_RDONLY);
1758
    if (ret)
1759
        goto fail;
1760

    
1761
    while (1) {
1762
        ret = url_read(in, recvbuf, sizeof(recvbuf));
1763
        if (ret == AVERROR(EAGAIN))
1764
            continue;
1765
        if (ret < 0)
1766
            goto fail;
1767
        if (ret < 12) {
1768
            av_log(s, AV_LOG_WARNING, "Received too short packet\n");
1769
            continue;
1770
        }
1771

    
1772
        if ((recvbuf[0] & 0xc0) != 0x80) {
1773
            av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
1774
                                      "received\n");
1775
            continue;
1776
        }
1777

    
1778
        payload_type = recvbuf[1] & 0x7f;
1779
        break;
1780
    }
1781
    getsockname(url_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
1782
    url_close(in);
1783
    in = NULL;
1784

    
1785
    memset(&codec, 0, sizeof(codec));
1786
    if (ff_rtp_get_codec_info(&codec, payload_type)) {
1787
        av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
1788
                                "without an SDP file describing it\n",
1789
                                 payload_type);
1790
        goto fail;
1791
    }
1792
    if (codec.codec_type != AVMEDIA_TYPE_DATA) {
1793
        av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
1794
                                  "properly you need an SDP file "
1795
                                  "describing it\n");
1796
    }
1797

    
1798
    av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
1799
                 NULL, 0, s->filename);
1800

    
1801
    snprintf(sdp, sizeof(sdp),
1802
             "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
1803
             addr.ss_family == AF_INET ? 4 : 6, host,
1804
             codec.codec_type == AVMEDIA_TYPE_DATA  ? "application" :
1805
             codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
1806
             port, payload_type);
1807
    av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
1808

    
1809
    init_put_byte(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
1810
    s->pb = &pb;
1811

    
1812
    /* sdp_read_header initializes this again */
1813
    ff_network_close();
1814

    
1815
    ret = sdp_read_header(s, ap);
1816
    s->pb = NULL;
1817
    return ret;
1818

    
1819
fail:
1820
    if (in)
1821
        url_close(in);
1822
    ff_network_close();
1823
    return ret;
1824
}
1825

    
1826
AVInputFormat rtp_demuxer = {
1827
    "rtp",
1828
    NULL_IF_CONFIG_SMALL("RTP input format"),
1829
    sizeof(RTSPState),
1830
    rtp_probe,
1831
    rtp_read_header,
1832
    ff_rtsp_fetch_packet,
1833
    sdp_read_close,
1834
    .flags = AVFMT_NOFILE,
1835
};
1836
#endif /* CONFIG_RTP_DEMUXER */
1837