stream/realrtsp/real.c

   1 /*
   2  * This file was ported to MPlayer from xine CVS real.c,v 1.8 2003/03/30 17:11:50
   3  */
   4
   5 /*
   6  * Copyright (C) 2002 the xine project
   7  *
   8  * This file is part of xine, a free video player.
   9  *
  10  * xine is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * xine is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
  23  *
  24  *
  25  * special functions for real streams.
  26  * adopted from joschkas real tools.
  27  *
  28  */
  29
  30 #include <stdio.h>
  31 #include <string.h>
  32
  33 #include "config.h"
  34 #include "libavutil/common.h"
  35 #include "real.h"
  36 #include "asmrp.h"
  37 #include "sdpplin.h"
  38 #include "xbuffer.h"
  39 #include "libavutil/md5.h"
  40 #include "libavutil/intreadwrite.h"
  41 #include "stream/http.h"
  42 #include "mp_msg.h"
  43
  44 /*
  45 #define LOG
  46 */
  47
  48 #define XOR_TABLE_SIZE 37
  49
  50 static const unsigned char xor_table[XOR_TABLE_SIZE] = {
  51     0x05, 0x18, 0x74, 0xd0, 0x0d, 0x09, 0x02, 0x53,
  52     0xc0, 0x01, 0x05, 0x05, 0x67, 0x03, 0x19, 0x70,
  53     0x08, 0x27, 0x66, 0x10, 0x10, 0x72, 0x08, 0x09,
  54     0x63, 0x11, 0x03, 0x71, 0x08, 0x08, 0x70, 0x02,
  55     0x10, 0x57, 0x05, 0x18, 0x54 };
  56
  57
  58 #define BUF_SIZE 4096
  59
  60 #ifdef LOG
  61 static void hexdump (const char *buf, int length) {
  62
  63   int i;
  64
  65   printf (" hexdump> ");
  66   for (i = 0; i < length; i++) {
  67     unsigned char c = buf[i];
  68
  69     printf ("%02x", c);
  70
  71     if ((i % 16) == 15)
  72       printf ("\n         ");
  73
  74     if ((i % 2) == 1)
  75       printf (" ");
  76
  77   }
  78   printf ("\n");
  79 }
  80 #endif
  81
  82
  83 static void real_calc_response_and_checksum (char *response, char *chksum, char *challenge) {
  84
  85   int   ch_len;
  86   int   i;
  87   unsigned char zres[16], buf[64];
  88
  89   /* initialize buffer */
  90   AV_WB32(buf, 0xa1e9149d);
  91   AV_WB32(buf+4, 0x0e6b3b59);
  92
  93   /* some (length) checks */
  94   if (challenge != NULL)
  95   {
  96     ch_len = strlen (challenge);
  97
  98     if (ch_len == 40) /* what a hack... */
  99       ch_len=32;
 100     if ( ch_len > 56 ) ch_len=56;
 101
 102     /* copy challenge to buf */
 103     memcpy(buf+8, challenge, ch_len);
 104     memset(buf+8+ch_len, 0, 56-ch_len);
 105   }
 106
 107     /* xor challenge bytewise with xor_table */
 108     for (i=0; i<XOR_TABLE_SIZE; i++)
 109       buf[8+i] ^= xor_table[i];
 110
 111   av_md5_sum(zres, buf, 64);
 112
 113   /* convert zres to ascii string */
 114   for (i=0; i<16; i++ )
 115     sprintf(response+i*2, "%02x", zres[i]);
 116
 117   /* add tail */
 118   strcpy (&response[32], "01d0a8e3");
 119
 120   /* calculate checksum */
 121   for (i=0; i<8; i++)
 122     chksum[i] = response[i*4];
 123   chksum[8] = 0;
 124 }
 125
 126
 127 /*
 128  * takes a MLTI-Chunk and a rule number got from match_asm_rule,
 129  * returns a pointer to selected data and number of bytes in that.
 130  */
 131
 132 static int select_mlti_data(const char *mlti_chunk, int mlti_size, int selection, char **out) {
 133
 134   int numrules, codec, size;
 135   int i;
 136
 137   /* MLTI chunk should begin with MLTI */
 138
 139   if ((mlti_chunk[0] != 'M')
 140       ||(mlti_chunk[1] != 'L')
 141       ||(mlti_chunk[2] != 'T')
 142       ||(mlti_chunk[3] != 'I'))
 143   {
 144 #ifdef LOG
 145     printf("libreal: MLTI tag not detected, copying data\n");
 146 #endif
 147     *out = xbuffer_copyin(*out, 0, mlti_chunk, mlti_size);
 148     return mlti_size;
 149   }
 150
 151   mlti_chunk+=4;
 152
 153   /* next 16 bits are the number of rules */
 154   numrules=AV_RB16(mlti_chunk);
 155   if (selection >= numrules) return 0;
 156
 157   /* now <numrules> indices of codecs follows */
 158   /* we skip to selection                     */
 159   mlti_chunk+=(selection+1)*2;
 160
 161   /* get our index */
 162   codec=AV_RB16(mlti_chunk);
 163
 164   /* skip to number of codecs */
 165   mlti_chunk+=(numrules-selection)*2;
 166
 167   /* get number of codecs */
 168   numrules=AV_RB16(mlti_chunk);
 169
 170   if (codec >= numrules) {
 171     mp_msg(MSGT_STREAM, MSGL_WARN, "realrtsp: codec index >= number of codecs. %i %i\n",
 172       codec, numrules);
 173     return 0;
 174   }
 175
 176   mlti_chunk+=2;
 177
 178   /* now seek to selected codec */
 179   for (i=0; i<codec; i++) {
 180     size=AV_RB32(mlti_chunk);
 181     mlti_chunk+=size+4;
 182   }
 183
 184   size=AV_RB32(mlti_chunk);
 185
 186 #ifdef LOG
 187   hexdump(mlti_chunk+4, size);
 188 #endif
 189   *out = xbuffer_copyin(*out, 0, mlti_chunk+4, size);
 190   return size;
 191 }
 192
 193 /*
 194  * looking at stream description.
 195  */
 196
 197 static rmff_header_t *real_parse_sdp(char *data, char **stream_rules, uint32_t bandwidth) {
 198
 199   sdpplin_t *desc;
 200   rmff_header_t *header;
 201   char *buf;
 202   int len, i;
 203   int max_bit_rate=0;
 204   int avg_bit_rate=0;
 205   int max_packet_size=0;
 206   int avg_packet_size=0;
 207   int duration=0;
 208
 209
 210   if (!data) return NULL;
 211
 212   desc=sdpplin_parse(data);
 213
 214   if (!desc) return NULL;
 215
 216   buf = xbuffer_init(2048);
 217   header=calloc(1,sizeof(rmff_header_t));
 218
 219   header->fileheader=rmff_new_fileheader(4+desc->stream_count);
 220   header->cont=rmff_new_cont(
 221       desc->title,
 222       desc->author,
 223       desc->copyright,
 224       desc->abstract);
 225   header->data=rmff_new_dataheader(0,0);
 226   header->streams=calloc(1,sizeof(rmff_mdpr_t*)*(desc->stream_count+1));
 227 #ifdef LOG
 228     printf("number of streams: %u\n", desc->stream_count);
 229 #endif
 230
 231   for (i=0; i<desc->stream_count; i++) {
 232
 233     int j=0;
 234     int n;
 235     char b[64];
 236     int rulematches[MAX_RULEMATCHES];
 237
 238 #ifdef LOG
 239     printf("calling asmrp_match with:\n%s\n%u\n", desc->stream[i]->asm_rule_book, bandwidth);
 240 #endif
 241     n=asmrp_match(desc->stream[i]->asm_rule_book, bandwidth, rulematches);
 242     for (j=0; j<n; j++) {
 243 #ifdef LOG
 244       printf("asmrp rule match: %u for stream %u\n", rulematches[j], desc->stream[i]->stream_id);
 245 #endif
 246       sprintf(b,"stream=%u;rule=%u,", desc->stream[i]->stream_id, rulematches[j]);
 247       *stream_rules = xbuffer_strcat(*stream_rules, b);
 248     }
 249
 250     if (!desc->stream[i]->mlti_data) {
 251         len = 0;
 252         buf = NULL;
 253     } else
 254     len=select_mlti_data(desc->stream[i]->mlti_data, desc->stream[i]->mlti_data_size, rulematches[0], &buf);
 255
 256     header->streams[i]=rmff_new_mdpr(
 257         desc->stream[i]->stream_id,
 258         desc->stream[i]->max_bit_rate,
 259         desc->stream[i]->avg_bit_rate,
 260         desc->stream[i]->max_packet_size,
 261         desc->stream[i]->avg_packet_size,
 262         desc->stream[i]->start_time,
 263         desc->stream[i]->preroll,
 264         desc->stream[i]->duration,
 265         desc->stream[i]->stream_name,
 266         desc->stream[i]->mime_type,
 267         len,
 268         buf);
 269
 270     duration=FFMAX(duration,desc->stream[i]->duration);
 271     max_bit_rate+=desc->stream[i]->max_bit_rate;
 272     avg_bit_rate+=desc->stream[i]->avg_bit_rate;
 273     max_packet_size=FFMAX(max_packet_size, desc->stream[i]->max_packet_size);
 274     if (avg_packet_size)
 275       avg_packet_size=(avg_packet_size + desc->stream[i]->avg_packet_size) / 2;
 276     else
 277       avg_packet_size=desc->stream[i]->avg_packet_size;
 278   }
 279
 280   if (*stream_rules && strlen(*stream_rules) && (*stream_rules)[strlen(*stream_rules)-1] == ',')
 281     (*stream_rules)[strlen(*stream_rules)-1]=0; /* delete last ',' in stream_rules */
 282
 283   header->prop=rmff_new_prop(
 284       max_bit_rate,
 285       avg_bit_rate,
 286       max_packet_size,
 287       avg_packet_size,
 288       0,
 289       duration,
 290       0,
 291       0,
 292       0,
 293       desc->stream_count,
 294       desc->flags);
 295
 296   rmff_fix_header(header);
 297   buf = xbuffer_free(buf);
 298   sdpplin_free(desc);
 299
 300   return header;
 301 }
 302
 303 int real_get_rdt_chunk(rtsp_t *rtsp_session, char **buffer, int rdt_rawdata) {
 304
 305   int n=1;
 306   uint8_t header[8];
 307   rmff_pheader_t ph;
 308   int size;
 309   int flags1, flags2;
 310   int unknown1;
 311   uint32_t ts;
 312   static uint32_t prev_ts = -1;
 313   static int prev_stream_number = -1;
 314
 315   n=rtsp_read_data(rtsp_session, header, 8);
 316   if (n<8) return 0;
 317   if (header[0] != 0x24)
 318   {
 319     mp_msg(MSGT_STREAM, MSGL_WARN, "realrtsp: rdt chunk not recognized: got 0x%02x\n",
 320       header[0]);
 321     return 0;
 322   }
 323   /* header[1] is channel, normally 0, ignored */
 324   size=(header[2]<<8)+header[3];
 325   flags1=header[4];
 326   if ((flags1 & 0xc0) != 0x40)
 327   {
 328 #ifdef LOG
 329     printf("got flags1: 0x%02x\n",flags1);
 330 #endif
 331     if(header[6] == 0x06) { // eof packet
 332       rtsp_read_data(rtsp_session, header, 7); // Skip the rest of the eof packet
 333       /* Some files have short auxiliary streams, we must ignore eof packets
 334        * for these streams to avoid premature eof.
 335        * Now the code declares eof only if the stream with id == 0 gets eof
 336        * (old code was: eof on the first eof packet received).
 337        */
 338       if(flags1 & 0x7c) // ignore eof for streams with id != 0
 339         return 0;
 340       mp_msg(MSGT_STREAM, MSGL_INFO, "realrtsp: Stream EOF detected\n");
 341       return -1;
 342     }
 343     header[0]=header[5];
 344     header[1]=header[6];
 345     header[2]=header[7];
 346     n=rtsp_read_data(rtsp_session, header+3, 5);
 347     if (n<5) return 0;
 348 #ifdef LOG
 349     printf("ignoring bytes:\n");
 350     hexdump(header, 8);
 351 #endif
 352     n=rtsp_read_data(rtsp_session, header+4, 4);
 353     if (n<4) return 0;
 354     flags1=header[4];
 355     size-=9;
 356   }
 357   flags2=header[7];
 358   // header[5..6] == frame number in stream
 359   unknown1=(header[5]<<16)+(header[6]<<8)+(header[7]);
 360   n=rtsp_read_data(rtsp_session, header, 6);
 361   if (n<6) return 0;
 362   ts=AV_RB32(header);
 363
 364 #ifdef LOG
 365   printf("ts: %u, size: %u, flags: 0x%02x, unknown values: 0x%06x 0x%02x 0x%02x\n",
 366           ts, size, flags1, unknown1, header[4], header[5]);
 367 #endif
 368   size+=2;
 369
 370   ph.object_version=0;
 371   ph.length=size;
 372   ph.stream_number=(flags1>>1)&0x1f;
 373   ph.timestamp=ts;
 374   ph.reserved=0;
 375   if ((flags2&1) == 0 && (prev_ts != ts || prev_stream_number != ph.stream_number))
 376   {
 377     prev_ts = ts;
 378     prev_stream_number = ph.stream_number;
 379     ph.flags=2;
 380   }
 381   else
 382     ph.flags=0;
 383   *buffer = xbuffer_ensure_size(*buffer, 12+size);
 384   if(rdt_rawdata) {
 385     n=rtsp_read_data(rtsp_session, *buffer, size-12);
 386     return (n <= 0) ? 0 : n;
 387   }
 388   rmff_dump_pheader(&ph, *buffer);
 389   size-=12;
 390   n=rtsp_read_data(rtsp_session, (*buffer)+12, size);
 391
 392   return (n <= 0) ? 0 : n+12;
 393 }
 394
 395 static int convert_timestamp(char *str, int *sec, int *msec) {
 396   int hh, mm, ss, ms = 0;
 397
 398   // Timestamp may be optionally quoted with ", skip it
 399   // Since the url is escaped when we get here, we skip the string "%22"
 400   if (!strncmp(str, "%22", 3))
 401     str += 3;
 402   if (sscanf(str, "%d:%d:%d.%d", &hh, &mm, &ss, &ms) < 3) {
 403     hh = 0;
 404     if (sscanf(str, "%d:%d.%d", &mm, &ss, &ms) < 2) {
 405       mm = 0;
 406       if (sscanf(str, "%d.%d", &ss, &ms) < 1) {
 407         ss = 0;
 408         ms = 0;
 409       }
 410     }
 411   }
 412   if (sec)
 413     *sec = hh * 3600 + mm * 60 + ss;
 414   if (msec)
 415     *msec = ms;
 416   return 1;
 417 }
 418
 419 //! maximum size of the rtsp description, must be < INT_MAX
 420 #define MAX_DESC_BUF (20 * 1024 * 1024)
 421 rmff_header_t *real_setup_and_get_header(rtsp_t *rtsp_session, uint32_t bandwidth,
 422   char *username, char *password) {
 423
 424   char *description=NULL;
 425   char *session_id=NULL;
 426   rmff_header_t *h;
 427   char *challenge1;
 428   char challenge2[41];
 429   char checksum[9];
 430   char *subscribe;
 431   char *buf = xbuffer_init(256);
 432   char *mrl=rtsp_get_mrl(rtsp_session);
 433   unsigned int size;
 434   int status;
 435   uint32_t maxbandwidth = bandwidth;
 436   char* authfield = NULL;
 437   int i;
 438
 439   /* get challenge */
 440   challenge1=strdup(rtsp_search_answers(rtsp_session,"RealChallenge1"));
 441 #ifdef LOG
 442   printf("real: Challenge1: %s\n", challenge1);
 443 #endif
 444
 445   /* set a reasonable default to get the best stream, unless bandwidth given */
 446   if (!bandwidth)
 447       bandwidth = 10485800;
 448
 449   /* request stream description */
 450 rtsp_send_describe:
 451   rtsp_schedule_field(rtsp_session, "Accept: application/sdp");
 452   sprintf(buf, "Bandwidth: %u", bandwidth);
 453   rtsp_schedule_field(rtsp_session, buf);
 454   rtsp_schedule_field(rtsp_session, "GUID: 00000000-0000-0000-0000-000000000000");
 455   rtsp_schedule_field(rtsp_session, "RegionData: 0");
 456   rtsp_schedule_field(rtsp_session, "ClientID: Linux_2.4_6.0.9.1235_play32_RN01_EN_586");
 457   rtsp_schedule_field(rtsp_session, "SupportsMaximumASMBandwidth: 1");
 458   rtsp_schedule_field(rtsp_session, "Language: en-US");
 459   rtsp_schedule_field(rtsp_session, "Require: com.real.retain-entity-for-setup");
 460   if(authfield)
 461     rtsp_schedule_field(rtsp_session, authfield);
 462   status=rtsp_request_describe(rtsp_session,NULL);
 463
 464   if (status == 401) {
 465     int authlen, b64_authlen;
 466     char *authreq;
 467     char* authstr = NULL;
 468
 469     if (authfield) {
 470       mp_msg(MSGT_STREAM, MSGL_ERR, "realrtsp: authorization failed, check your credentials\n");
 471       goto autherr;
 472     }
 473     if (!(authreq = rtsp_search_answers(rtsp_session,"WWW-Authenticate"))) {
 474       mp_msg(MSGT_STREAM, MSGL_ERR, "realrtsp: 401 but no auth request, aborting\n");
 475       goto autherr;
 476     }
 477     if (!username) {
 478       mp_msg(MSGT_STREAM, MSGL_ERR, "realrtsp: auth required but no username supplied\n");
 479       goto autherr;
 480     }
 481     if (!strstr(authreq, "Basic")) {
 482       mp_msg(MSGT_STREAM, MSGL_ERR, "realrtsp: authenticator not supported (%s)\n", authreq);
 483       goto autherr;
 484     }
 485     authlen = strlen(username) + (password ? strlen(password) : 0) + 2;
 486     authstr = malloc(authlen);
 487     sprintf(authstr, "%s:%s", username, password ? password : "");
 488     authfield = malloc(authlen*2+22);
 489     strcpy(authfield, "Authorization: Basic ");
 490     b64_authlen = base64_encode(authstr, authlen, authfield+21, authlen*2);
 491     free(authstr);
 492     if (b64_authlen < 0) {
 493       mp_msg(MSGT_STREAM, MSGL_ERR, "realrtsp: base64 output overflow, this should never happen\n");
 494       goto autherr;
 495     }
 496     authfield[b64_authlen+21] = 0;
 497     goto rtsp_send_describe;
 498   }
 499 autherr:
 500
 501   if (authfield)
 502      free(authfield);
 503
 504   if ( status<200 || status>299 )
 505   {
 506     char *alert=rtsp_search_answers(rtsp_session,"Alert");
 507     if (alert) {
 508       mp_msg(MSGT_STREAM, MSGL_WARN, "realrtsp: got message from server:\n%s\n",
 509         alert);
 510     }
 511     rtsp_send_ok(rtsp_session);
 512     buf = xbuffer_free(buf);
 513     return NULL;
 514   }
 515
 516   /* receive description */
 517   size=0;
 518   if (!rtsp_search_answers(rtsp_session,"Content-length"))
 519     mp_msg(MSGT_STREAM, MSGL_WARN, "real: got no Content-length!\n");
 520   else
 521     size=atoi(rtsp_search_answers(rtsp_session,"Content-length"));
 522
 523   // as size is unsigned this also catches the case (size < 0)
 524   if (size > MAX_DESC_BUF) {
 525     mp_msg(MSGT_STREAM, MSGL_ERR, "realrtsp: Content-length for description too big (> %uMB)!\n",
 526             MAX_DESC_BUF/(1024*1024) );
 527     xbuffer_free(buf);
 528     return NULL;
 529   }
 530
 531   if (!rtsp_search_answers(rtsp_session,"ETag"))
 532     mp_msg(MSGT_STREAM, MSGL_WARN, "realrtsp: got no ETag!\n");
 533   else
 534     session_id=strdup(rtsp_search_answers(rtsp_session,"ETag"));
 535
 536 #ifdef LOG
 537   printf("real: Stream description size: %u\n", size);
 538 #endif
 539
 540   description=malloc(size+1);
 541
 542   if( rtsp_read_data(rtsp_session, description, size) <= 0) {
 543     buf = xbuffer_free(buf);
 544     return NULL;
 545   }
 546   description[size]=0;
 547
 548   /* parse sdp (sdpplin) and create a header and a subscribe string */
 549   subscribe = xbuffer_init(256);
 550   strcpy(subscribe, "Subscribe: ");
 551   h=real_parse_sdp(description, &subscribe, bandwidth);
 552   if (!h) {
 553     subscribe = xbuffer_free(subscribe);
 554     buf = xbuffer_free(buf);
 555     return NULL;
 556   }
 557   rmff_fix_header(h);
 558
 559 #ifdef LOG
 560   printf("Title: %s\nCopyright: %s\nAuthor: %s\nStreams: %i\n",
 561     h->cont->title, h->cont->copyright, h->cont->author, h->prop->num_streams);
 562 #endif
 563
 564   /* setup our streams */
 565   real_calc_response_and_checksum (challenge2, checksum, challenge1);
 566   buf = xbuffer_ensure_size(buf, strlen(challenge2) + strlen(checksum) + 32);
 567   sprintf(buf, "RealChallenge2: %s, sd=%s", challenge2, checksum);
 568   rtsp_schedule_field(rtsp_session, buf);
 569   buf = xbuffer_ensure_size(buf, strlen(session_id) + 32);
 570   sprintf(buf, "If-Match: %s", session_id);
 571   rtsp_schedule_field(rtsp_session, buf);
 572   rtsp_schedule_field(rtsp_session, "Transport: x-pn-tng/tcp;mode=play,rtp/avp/tcp;unicast;mode=play");
 573   buf = xbuffer_ensure_size(buf, strlen(mrl) + 32);
 574   sprintf(buf, "%s/streamid=0", mrl);
 575   rtsp_request_setup(rtsp_session,buf,NULL);
 576
 577   /* Do setup for all the other streams we subscribed to */
 578   for (i = 1; i < h->prop->num_streams; i++) {
 579     rtsp_schedule_field(rtsp_session, "Transport: x-pn-tng/tcp;mode=play,rtp/avp/tcp;unicast;mode=play");
 580     buf = xbuffer_ensure_size(buf, strlen(session_id) + 32);
 581     sprintf(buf, "If-Match: %s", session_id);
 582     rtsp_schedule_field(rtsp_session, buf);
 583
 584     buf = xbuffer_ensure_size(buf, strlen(mrl) + 32);
 585     sprintf(buf, "%s/streamid=%d", mrl, i);
 586     rtsp_request_setup(rtsp_session,buf,NULL);
 587   }
 588   /* set stream parameter (bandwidth) with our subscribe string */
 589   rtsp_schedule_field(rtsp_session, subscribe);
 590   rtsp_request_setparameter(rtsp_session,NULL);
 591
 592   /* set delivery bandwidth */
 593   if (maxbandwidth) {
 594       sprintf(buf, "SetDeliveryBandwidth: Bandwidth=%u;BackOff=0", maxbandwidth);
 595       rtsp_schedule_field(rtsp_session, buf);
 596       rtsp_request_setparameter(rtsp_session,NULL);
 597   }
 598
 599   {
 600     int s_ss = 0, s_ms = 0, e_ss = 0, e_ms = 0;
 601     char *str;
 602     if ((str = rtsp_get_param(rtsp_session, "start"))) {
 603       convert_timestamp(str, &s_ss, &s_ms);
 604       free(str);
 605     }
 606     if ((str = rtsp_get_param(rtsp_session, "end"))) {
 607       convert_timestamp(str, &e_ss, &e_ms);
 608       free(str);
 609     }
 610     str = buf + sprintf(buf, s_ms ? "%s%d.%d-" : "%s%d-", "Range: npt=", s_ss, s_ms);
 611     if (e_ss || e_ms)
 612       sprintf(str, e_ms ? "%d.%d" : "%d", e_ss, e_ms);
 613   }
 614   rtsp_schedule_field(rtsp_session, buf);
 615   /* and finally send a play request */
 616   rtsp_request_play(rtsp_session,NULL);
 617
 618   subscribe = xbuffer_free(subscribe);
 619   buf = xbuffer_free(buf);
 620   return h;
 621 }
 622
 623 struct real_rtsp_session_t *
 624 init_real_rtsp_session (void)
 625 {
 626   struct real_rtsp_session_t *real_rtsp_session = NULL;
 627
 628   real_rtsp_session = malloc (sizeof (struct real_rtsp_session_t));
 629   real_rtsp_session->recv = xbuffer_init (BUF_SIZE);
 630   real_rtsp_session->rdteof = 0;
 631   real_rtsp_session->rdt_rawdata = 0;
 632
 633   return real_rtsp_session;
 634 }
 635
 636 void
 637 free_real_rtsp_session (struct real_rtsp_session_t* real_session)
 638 {
 639   if (!real_session)
 640     return;
 641
 642   xbuffer_free (real_session->recv);
 643   free (real_session);
 644 }