modules/access/mms/mmsh.c

   1 /*****************************************************************************
   2  * mmsh.c:
   3  *****************************************************************************
   4  * Copyright (C) 2001, 2002 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc_common.h>
  33 #include <vlc_access.h>
  34 #include <vlc_strings.h>
  35 #include <vlc_input.h>
  36
  37 #include <vlc_network.h>
  38 #include <vlc_url.h>
  39 #include "asf.h"
  40 #include "buffer.h"
  41
  42 #include "mms.h"
  43 #include "mmsh.h"
  44
  45 /* TODO:
  46  *  - authentication
  47  */
  48
  49 /*****************************************************************************
  50  * Local prototypes
  51  *****************************************************************************/
  52 int  MMSHOpen  ( access_t * );
  53 void MMSHClose ( access_t * );
  54
  55 static block_t *Block( access_t *p_access );
  56 static ssize_t ReadRedirect( access_t *, uint8_t *, size_t );
  57 static int  Seek( access_t *, uint64_t );
  58 static int  Control( access_t *, int, va_list );
  59
  60 static int  Describe( access_t  *, char **ppsz_location );
  61 static int  Start( access_t *, uint64_t );
  62 static void Stop( access_t * );
  63
  64 static int  GetPacket( access_t *, chunk_t * );
  65 static void GetHeader( access_t *p_access, int i_content_length );
  66
  67 static int Restart( access_t * );
  68 static int Reset( access_t * );
  69
  70 //#define MMSH_USER_AGENT "NSPlayer/4.1.0.3856"
  71 #define MMSH_USER_AGENT "NSPlayer/7.10.0.3059"
  72
  73 /****************************************************************************
  74  * Open: connect to ftp server and ask for file
  75  ****************************************************************************/
  76 int MMSHOpen( access_t *p_access )
  77 {
  78     access_sys_t    *p_sys;
  79     char            *psz_location = NULL;
  80     char            *psz_proxy;
  81
  82     STANDARD_BLOCK_ACCESS_INIT
  83
  84     p_sys->i_proto= MMS_PROTO_HTTP;
  85     p_sys->fd     = -1;
  86
  87     /* Handle proxy */
  88     p_sys->b_proxy = false;
  89     memset( &p_sys->proxy, 0, sizeof(p_sys->proxy) );
  90
  91     /* Check proxy */
  92     /* TODO reuse instead http-proxy from http access ? */
  93     psz_proxy = var_CreateGetNonEmptyString( p_access, "mmsh-proxy" );
  94     if( !psz_proxy )
  95     {
  96         char *psz_http_proxy = var_InheritString( p_access, "http-proxy" );
  97         if( psz_http_proxy )
  98         {
  99             psz_proxy = psz_http_proxy;
 100             var_SetString( p_access, "mmsh-proxy", psz_proxy );
 101         }
 102     }
 103
 104     if( psz_proxy )
 105     {
 106         p_sys->b_proxy = true;
 107         vlc_UrlParse( &p_sys->proxy, psz_proxy, 0 );
 108         free( psz_proxy );
 109     }
 110     else
 111     {
 112         const char *http_proxy = getenv( "http_proxy" );
 113         if( http_proxy )
 114         {
 115             p_sys->b_proxy = true;
 116             vlc_UrlParse( &p_sys->proxy, http_proxy, 0 );
 117         }
 118     }
 119
 120     if( p_sys->b_proxy )
 121     {
 122         if( ( p_sys->proxy.psz_host == NULL ) ||
 123             ( *p_sys->proxy.psz_host == '\0' ) )
 124         {
 125             msg_Warn( p_access, "invalid proxy host" );
 126             vlc_UrlClean( &p_sys->proxy );
 127             free( p_sys );
 128             return VLC_EGENERIC;
 129         }
 130
 131         if( p_sys->proxy.i_port <= 0 )
 132             p_sys->proxy.i_port = 80;
 133         msg_Dbg( p_access, "Using http proxy %s:%d",
 134                  p_sys->proxy.psz_host, p_sys->proxy.i_port );
 135     }
 136
 137     /* open a tcp connection */
 138     vlc_UrlParse( &p_sys->url, p_access->psz_location, 0 );
 139     if( ( p_sys->url.psz_host == NULL ) ||
 140         ( *p_sys->url.psz_host == '\0' ) )
 141     {
 142         msg_Err( p_access, "invalid host" );
 143         goto error;
 144     }
 145     if( p_sys->url.i_port <= 0 )
 146         p_sys->url.i_port = 80;
 147
 148     if( Describe( p_access, &psz_location ) )
 149         goto error;
 150
 151     /* Handle redirection */
 152     if( psz_location && *psz_location )
 153     {
 154         msg_Dbg( p_access, "redirection to %s", psz_location );
 155
 156         input_thread_t * p_input = access_GetParentInput( p_access );
 157         input_item_t * p_new_loc;
 158
 159         if( !p_input )
 160         {
 161             free( psz_location );
 162             goto error;
 163         }
 164         /** \bug we do not autodelete here */
 165         p_new_loc = input_item_New( psz_location, psz_location );
 166         input_item_t *p_item = input_GetItem( p_input );
 167         input_item_PostSubItem( p_item, p_new_loc );
 168
 169         vlc_gc_decref( p_new_loc );
 170         vlc_object_release( p_input );
 171
 172         free( psz_location );
 173
 174         p_access->pf_block = NULL;
 175         p_access->pf_read = ReadRedirect;
 176         return VLC_SUCCESS;
 177     }
 178     free( psz_location );
 179
 180     /* Start playing */
 181     if( Start( p_access, 0 ) )
 182     {
 183         msg_Err( p_access, "cannot start stream" );
 184         free( p_sys->p_header );
 185         goto error;
 186     }
 187
 188     if( !p_sys->b_broadcast )
 189     {
 190         p_access->info.i_size = p_sys->asfh.i_file_size;
 191     }
 192
 193     return VLC_SUCCESS;
 194
 195 error:
 196     vlc_UrlClean( &p_sys->proxy );
 197     vlc_UrlClean( &p_sys->url );
 198     free( p_sys );
 199     return VLC_EGENERIC;
 200 }
 201
 202 /*****************************************************************************
 203  * Close: free unused data structures
 204  *****************************************************************************/
 205 void  MMSHClose ( access_t *p_access )
 206 {
 207     access_sys_t *p_sys = p_access->p_sys;
 208
 209     Stop( p_access );
 210
 211     free( p_sys->p_header );
 212
 213     vlc_UrlClean( &p_sys->proxy );
 214     vlc_UrlClean( &p_sys->url );
 215     free( p_sys );
 216 }
 217
 218 /*****************************************************************************
 219  * Control:
 220  *****************************************************************************/
 221 static int Control( access_t *p_access, int i_query, va_list args )
 222 {
 223     access_sys_t *p_sys = p_access->p_sys;
 224     bool   *pb_bool;
 225     bool    b_bool;
 226     int64_t      *pi_64;
 227     int          i_int;
 228
 229     switch( i_query )
 230     {
 231         /* */
 232         case ACCESS_CAN_SEEK:
 233             pb_bool = (bool*)va_arg( args, bool* );
 234             *pb_bool = !p_sys->b_broadcast;
 235             break;
 236
 237         case ACCESS_CAN_FASTSEEK:
 238             pb_bool = (bool*)va_arg( args, bool* );
 239             *pb_bool = false;
 240             break;
 241
 242         case ACCESS_CAN_PAUSE:
 243         case ACCESS_CAN_CONTROL_PACE:
 244             pb_bool = (bool*)va_arg( args, bool* );
 245             *pb_bool = true;
 246             break;
 247
 248         /* */
 249         case ACCESS_GET_PTS_DELAY:
 250             pi_64 = (int64_t*)va_arg( args, int64_t * );
 251             *pi_64 = INT64_C(1000)
 252                    * var_InheritInteger( p_access, "network-caching" );
 253             break;
 254
 255         case ACCESS_GET_PRIVATE_ID_STATE:
 256             i_int = (int)va_arg( args, int );
 257             pb_bool = (bool *)va_arg( args, bool * );
 258
 259             if( (i_int < 0) || (i_int > 127) )
 260                 return VLC_EGENERIC;
 261             *pb_bool =  p_sys->asfh.stream[i_int].i_selected ? true : false;
 262             break;
 263
 264         /* */
 265         case ACCESS_SET_PAUSE_STATE:
 266             b_bool = (bool)va_arg( args, int );
 267             if( b_bool )
 268                 Stop( p_access );
 269             else
 270                 Seek( p_access, p_access->info.i_pos );
 271             break;
 272
 273         case ACCESS_GET_TITLE_INFO:
 274         case ACCESS_SET_TITLE:
 275         case ACCESS_SET_SEEKPOINT:
 276         case ACCESS_SET_PRIVATE_ID_STATE:
 277         case ACCESS_GET_CONTENT_TYPE:
 278             return VLC_EGENERIC;
 279
 280         default:
 281             msg_Warn( p_access, "unimplemented query in control" );
 282             return VLC_EGENERIC;
 283
 284     }
 285     return VLC_SUCCESS;
 286 }
 287
 288 /*****************************************************************************
 289  * Seek: try to go at the right place
 290  *****************************************************************************/
 291 static int Seek( access_t *p_access, uint64_t i_pos )
 292 {
 293     access_sys_t *p_sys = p_access->p_sys;
 294     chunk_t      ck;
 295     uint64_t     i_offset;
 296     uint64_t     i_packet;
 297
 298     msg_Dbg( p_access, "seeking to %"PRId64, i_pos );
 299
 300     i_packet = ( i_pos - p_sys->i_header ) / p_sys->asfh.i_min_data_packet_size;
 301     i_offset = ( i_pos - p_sys->i_header ) % p_sys->asfh.i_min_data_packet_size;
 302
 303     Stop( p_access );
 304     Start( p_access, i_packet * p_sys->asfh.i_min_data_packet_size );
 305
 306     while( vlc_object_alive (p_access) )
 307     {
 308         if( GetPacket( p_access, &ck ) )
 309             break;
 310
 311         /* skip headers */
 312         if( ck.i_type != 0x4824 )
 313             break;
 314
 315         msg_Warn( p_access, "skipping header" );
 316     }
 317
 318     p_access->info.i_pos = i_pos;
 319     p_access->info.b_eof = false;
 320     p_sys->i_packet_used += i_offset;
 321
 322     return VLC_SUCCESS;
 323 }
 324
 325 /*****************************************************************************
 326  * ReadRedirect:
 327  *****************************************************************************/
 328 static ssize_t ReadRedirect( access_t *p_access, uint8_t *p, size_t i_len )
 329 {
 330     VLC_UNUSED(p_access); VLC_UNUSED(p); VLC_UNUSED(i_len);
 331     return 0;
 332 }
 333
 334 /*****************************************************************************
 335  * Block:
 336  *****************************************************************************/
 337 static block_t *Block( access_t *p_access )
 338 {
 339     access_sys_t *p_sys = p_access->p_sys;
 340     const unsigned i_packet_min = p_sys->asfh.i_min_data_packet_size;
 341
 342     if( p_access->info.i_pos < p_sys->i_start + p_sys->i_header )
 343     {
 344         const size_t i_offset = p_access->info.i_pos - p_sys->i_start;
 345         const size_t i_copy = p_sys->i_header - i_offset;
 346
 347         block_t *p_block = block_New( p_access, i_copy );
 348         if( !p_block )
 349             return NULL;
 350
 351         memcpy( p_block->p_buffer, &p_sys->p_header[i_offset], i_copy );
 352         p_access->info.i_pos += i_copy;
 353         return p_block;
 354     }
 355     else if( p_sys->i_packet_length > 0 &&
 356              p_sys->i_packet_used < __MAX( p_sys->i_packet_length, i_packet_min ) )
 357     {
 358         size_t i_copy = 0;
 359         size_t i_padding = 0;
 360
 361         if( p_sys->i_packet_used < p_sys->i_packet_length )
 362             i_copy = p_sys->i_packet_length - p_sys->i_packet_used;
 363         if( __MAX( p_sys->i_packet_used, p_sys->i_packet_length ) < i_packet_min )
 364             i_padding = i_packet_min - __MAX( p_sys->i_packet_used, p_sys->i_packet_length );
 365
 366         block_t *p_block = block_New( p_access, i_copy + i_padding );
 367         if( !p_block )
 368             return NULL;
 369
 370         if( i_copy > 0 )
 371             memcpy( &p_block->p_buffer[0], &p_sys->p_packet[p_sys->i_packet_used], i_copy );
 372         if( i_padding > 0 )
 373             memset( &p_block->p_buffer[i_copy], 0, i_padding );
 374
 375         p_sys->i_packet_used += i_copy + i_padding;
 376         p_access->info.i_pos += i_copy + i_padding;
 377         return p_block;
 378
 379     }
 380
 381     chunk_t ck;
 382     if( GetPacket( p_access, &ck ) )
 383     {
 384         int i_ret = -1;
 385         if( p_sys->b_broadcast )
 386         {
 387             if( (ck.i_type == 0x4524) && (ck.i_sequence != 0) )
 388                 i_ret = Restart( p_access );
 389             else if( ck.i_type == 0x4324 )
 390                 i_ret = Reset( p_access );
 391         }
 392         if( i_ret )
 393         {
 394             p_access->info.b_eof = true;
 395             return 0;
 396         }
 397     }
 398     if( ck.i_type != 0x4424 )
 399     {
 400         p_sys->i_packet_used = 0;
 401         p_sys->i_packet_length = 0;
 402     }
 403
 404     return NULL;
 405 }
 406
 407 /* */
 408 static int Restart( access_t *p_access )
 409 {
 410     access_sys_t *p_sys = p_access->p_sys;
 411     char *psz_location = NULL;
 412
 413     msg_Dbg( p_access, "Restart the stream" );
 414     p_sys->i_start = p_access->info.i_pos;
 415
 416     /* */
 417     msg_Dbg( p_access, "stoping the stream" );
 418     Stop( p_access );
 419
 420     /* */
 421     msg_Dbg( p_access, "describe the stream" );
 422     if( Describe( p_access, &psz_location ) )
 423     {
 424         msg_Err( p_access, "describe failed" );
 425         return VLC_EGENERIC;
 426     }
 427     free( psz_location );
 428
 429     /* */
 430     if( Start( p_access, 0 ) )
 431     {
 432         msg_Err( p_access, "Start failed" );
 433         return VLC_EGENERIC;
 434     }
 435     return VLC_SUCCESS;
 436 }
 437 static int Reset( access_t *p_access )
 438 {
 439     access_sys_t *p_sys = p_access->p_sys;
 440     asf_header_t old_asfh = p_sys->asfh;
 441     int i;
 442
 443     msg_Dbg( p_access, "Reset the stream" );
 444     p_sys->i_start = p_access->info.i_pos;
 445
 446     /* */
 447     p_sys->i_packet_sequence = 0;
 448     p_sys->i_packet_used = 0;
 449     p_sys->i_packet_length = 0;
 450     p_sys->p_packet = NULL;
 451
 452     /* Get the next header FIXME memory loss ? */
 453     GetHeader( p_access, -1 );
 454     if( p_sys->i_header <= 0 )
 455         return VLC_EGENERIC;
 456
 457     asf_HeaderParse ( &p_sys->asfh,
 458                        p_sys->p_header, p_sys->i_header );
 459     msg_Dbg( p_access, "packet count=%"PRId64" packet size=%d",
 460              p_sys->asfh.i_data_packets_count,
 461              p_sys->asfh.i_min_data_packet_size );
 462
 463     asf_StreamSelect( &p_sys->asfh,
 464                        var_InheritInteger( p_access, "mms-maxbitrate" ),
 465                        var_InheritBool( p_access, "mms-all" ),
 466                        var_InheritBool( p_access, "audio" ),
 467                        var_InheritBool( p_access, "video" ) );
 468
 469     /* Check we have comptible asfh */
 470     for( i = 1; i < 128; i++ )
 471     {
 472         asf_stream_t *p_old = &old_asfh.stream[i];
 473         asf_stream_t *p_new = &p_sys->asfh.stream[i];
 474
 475         if( p_old->i_cat != p_new->i_cat || p_old->i_selected != p_new->i_selected )
 476             break;
 477     }
 478     if( i < 128 )
 479     {
 480         msg_Warn( p_access, "incompatible asf header, restart" );
 481         return Restart( p_access );
 482     }
 483
 484     /* */
 485     p_sys->i_packet_used = 0;
 486     p_sys->i_packet_length = 0;
 487     return VLC_SUCCESS;
 488 }
 489
 490 static int OpenConnection( access_t *p_access )
 491 {
 492     access_sys_t *p_sys = p_access->p_sys;
 493     vlc_url_t    srv = p_sys->b_proxy ? p_sys->proxy : p_sys->url;
 494
 495     if( ( p_sys->fd = net_ConnectTCP( p_access,
 496                                       srv.psz_host, srv.i_port ) ) < 0 )
 497     {
 498         msg_Err( p_access, "cannot connect to %s:%d",
 499                  srv.psz_host, srv.i_port );
 500         return VLC_EGENERIC;
 501     }
 502
 503     if( p_sys->b_proxy )
 504     {
 505         net_Printf( p_access, p_sys->fd, NULL,
 506                     "GET http://%s:%d%s HTTP/1.0\r\n",
 507                     p_sys->url.psz_host, p_sys->url.i_port,
 508                     ( (p_sys->url.psz_path == NULL) ||
 509                       (*p_sys->url.psz_path == '\0') ) ?
 510                          "/" : p_sys->url.psz_path );
 511
 512         /* Proxy Authentication */
 513         if( p_sys->proxy.psz_username && *p_sys->proxy.psz_username )
 514         {
 515             char *buf;
 516             char *b64;
 517
 518             if( asprintf( &buf, "%s:%s", p_sys->proxy.psz_username,
 519                        p_sys->proxy.psz_password ? p_sys->proxy.psz_password : "" ) == -1 )
 520                 return VLC_ENOMEM;
 521
 522             b64 = vlc_b64_encode( buf );
 523             free( buf );
 524
 525             net_Printf( p_access, p_sys->fd, NULL,
 526                         "Proxy-Authorization: Basic %s\r\n", b64 );
 527             free( b64 );
 528         }
 529     }
 530     else
 531     {
 532         net_Printf( p_access, p_sys->fd, NULL,
 533                     "GET %s HTTP/1.0\r\n"
 534                     "Host: %s:%d\r\n",
 535                     ( (p_sys->url.psz_path == NULL) ||
 536                       (*p_sys->url.psz_path == '\0') ) ?
 537                             "/" : p_sys->url.psz_path,
 538                     p_sys->url.psz_host, p_sys->url.i_port );
 539     }
 540     return VLC_SUCCESS;
 541 }
 542
 543 /*****************************************************************************
 544  * Describe:
 545  *****************************************************************************/
 546 static int Describe( access_t  *p_access, char **ppsz_location )
 547 {
 548     access_sys_t *p_sys = p_access->p_sys;
 549     char         *psz_location = NULL;
 550     int          i_content_length = -1;
 551     bool         b_keepalive = false;
 552     char         *psz;
 553     int          i_code;
 554
 555     /* Reinit context */
 556     p_sys->b_broadcast = true;
 557     p_sys->i_request_context = 1;
 558     p_sys->i_packet_sequence = 0;
 559     p_sys->i_packet_used = 0;
 560     p_sys->i_packet_length = 0;
 561     p_sys->p_packet = NULL;
 562
 563     GenerateGuid ( &p_sys->guid );
 564
 565     if( OpenConnection( p_access ) )
 566         return VLC_EGENERIC;
 567
 568     net_Printf( p_access, p_sys->fd, NULL,
 569                 "Accept: */*\r\n"
 570                 "User-Agent: "MMSH_USER_AGENT"\r\n"
 571                 "Pragma: no-cache,rate=1.000000,stream-time=0,stream-offset=0:0,request-context=%d,max-duration=0\r\n"
 572                 "Pragma: xClientGUID={"GUID_FMT"}\r\n"
 573                 "Connection: Close\r\n",
 574                 p_sys->i_request_context++,
 575                 GUID_PRINT( p_sys->guid ) );
 576
 577     if( net_Printf( p_access, p_sys->fd, NULL, "\r\n" ) < 0 )
 578     {
 579         msg_Err( p_access, "failed to send request" );
 580         goto error;
 581     }
 582
 583     /* Receive the http header */
 584     if( ( psz = net_Gets( p_access, p_sys->fd, NULL ) ) == NULL )
 585     {
 586         msg_Err( p_access, "failed to read answer" );
 587         goto error;
 588     }
 589
 590     if( strncmp( psz, "HTTP/1.", 7 ) )
 591     {
 592         msg_Err( p_access, "invalid HTTP reply '%s'", psz );
 593         free( psz );
 594         goto error;
 595     }
 596     i_code = atoi( &psz[9] );
 597     if( i_code >= 400 )
 598     {
 599         msg_Err( p_access, "error: %s", psz );
 600         free( psz );
 601         goto error;
 602     }
 603
 604     msg_Dbg( p_access, "HTTP reply '%s'", psz );
 605     free( psz );
 606     for( ;; )
 607     {
 608         char *psz = net_Gets( p_access, p_sys->fd, NULL );
 609         char *p;
 610
 611         if( psz == NULL )
 612         {
 613             msg_Err( p_access, "failed to read answer" );
 614             goto error;
 615         }
 616
 617         if( *psz == '\0' )
 618         {
 619             free( psz );
 620             break;
 621         }
 622
 623         if( ( p = strchr( psz, ':' ) ) == NULL )
 624         {
 625             msg_Err( p_access, "malformed header line: %s", psz );
 626             free( psz );
 627             goto error;
 628         }
 629         *p++ = '\0';
 630         while( *p == ' ' ) p++;
 631
 632         /* FIXME FIXME test Content-Type to see if it's a plain stream or an
 633          * asx FIXME */
 634         if( !strcasecmp( psz, "Pragma" ) )
 635         {
 636             if( strstr( p, "features" ) )
 637             {
 638                 /* FIXME, it is a bit badly done here ..... */
 639                 if( strstr( p, "broadcast" ) )
 640                 {
 641                     msg_Dbg( p_access, "stream type = broadcast" );
 642                     p_sys->b_broadcast = true;
 643                 }
 644                 else if( strstr( p, "seekable" ) )
 645                 {
 646                     msg_Dbg( p_access, "stream type = seekable" );
 647                     p_sys->b_broadcast = false;
 648                 }
 649                 else
 650                 {
 651                     msg_Warn( p_access, "unknow stream types (%s)", p );
 652                     p_sys->b_broadcast = false;
 653                 }
 654             }
 655         }
 656         else if( !strcasecmp( psz, "Location" ) )
 657         {
 658             psz_location = strdup( p );
 659         }
 660         else if( !strcasecmp( psz, "Content-Length" ) )
 661         {
 662             i_content_length = atoi( p );
 663             msg_Dbg( p_access, "content-length = %d", i_content_length );
 664         }
 665         else if( !strcasecmp( psz, "Connection" ) )
 666         {
 667             if( strcasestr( p, "Keep-Alive" ) )
 668             {
 669                 msg_Dbg( p_access, "Keep-Alive header found" );
 670                 b_keepalive = true;
 671             }
 672         }
 673
 674
 675         free( psz );
 676     }
 677
 678     /* Handle the redirection */
 679     if( ( (i_code == 301) || (i_code == 302) ||
 680           (i_code == 303) || (i_code == 307) ) &&
 681         psz_location && *psz_location )
 682     {
 683         msg_Dbg( p_access, "redirection to %s", psz_location );
 684         net_Close( p_sys->fd ); p_sys->fd = -1;
 685
 686         *ppsz_location = psz_location;
 687         return VLC_SUCCESS;
 688     }
 689     free( psz_location );
 690
 691     /* Read the asf header */
 692     GetHeader( p_access, b_keepalive ? i_content_length : -1);
 693     if( p_sys->i_header <= 0 )
 694     {
 695         msg_Err( p_access, "header size == 0" );
 696         goto error;
 697     }
 698     /* close this connection */
 699     net_Close( p_sys->fd );
 700     p_sys->fd = -1;
 701
 702     /* *** parse header and get stream and their id *** */
 703     /* get all streams properties,
 704      *
 705      * TODO : stream bitrates properties(optional)
 706      *        and bitrate mutual exclusion(optional) */
 707     asf_HeaderParse ( &p_sys->asfh,
 708                        p_sys->p_header, p_sys->i_header );
 709     msg_Dbg( p_access, "packet count=%"PRId64" packet size=%d",
 710              p_sys->asfh.i_data_packets_count,
 711              p_sys->asfh.i_min_data_packet_size );
 712
 713     if( p_sys->asfh.i_min_data_packet_size <= 0 )
 714         goto error;
 715
 716     asf_StreamSelect( &p_sys->asfh,
 717                        var_InheritInteger( p_access, "mms-maxbitrate" ),
 718                        var_InheritBool( p_access, "mms-all" ),
 719                        var_InheritBool( p_access, "audio" ),
 720                        var_InheritBool( p_access, "video" ) );
 721     return VLC_SUCCESS;
 722
 723 error:
 724     if( p_sys->fd > 0 )
 725     {
 726         net_Close( p_sys->fd  );
 727         p_sys->fd = -1;
 728     }
 729     return VLC_EGENERIC;
 730 }
 731
 732 static void GetHeader( access_t *p_access, int i_content_length )
 733 {
 734     access_sys_t *p_sys = p_access->p_sys;
 735     int i_read_content = 0;
 736
 737     /* Read the asf header */
 738     p_sys->i_header = 0;
 739     free( p_sys->p_header  );
 740     p_sys->p_header = NULL;
 741     for( ;; )
 742     {
 743         chunk_t ck;
 744         if( (i_content_length >= 0 && i_read_content >= i_content_length) || GetPacket( p_access, &ck ) || ck.i_type != 0x4824 )
 745             break;
 746
 747         i_read_content += (4+ck.i_size);
 748
 749         if( ck.i_data > 0 )
 750         {
 751             p_sys->i_header += ck.i_data;
 752             p_sys->p_header = xrealloc( p_sys->p_header, p_sys->i_header );
 753             memcpy( &p_sys->p_header[p_sys->i_header - ck.i_data],
 754                     ck.p_data, ck.i_data );
 755         }
 756     }
 757     msg_Dbg( p_access, "complete header size=%d", p_sys->i_header );
 758 }
 759
 760
 761 /*****************************************************************************
 762  * Start stream
 763  ****************************************************************************/
 764 static int Start( access_t *p_access, uint64_t i_pos )
 765 {
 766     access_sys_t *p_sys = p_access->p_sys;
 767     int  i_streams = 0;
 768     int  i_streams_selected = 0;
 769     int  i;
 770     char *psz = NULL;
 771
 772     msg_Dbg( p_access, "starting stream" );
 773
 774     for( i = 1; i < 128; i++ )
 775     {
 776         if( p_sys->asfh.stream[i].i_cat == ASF_STREAM_UNKNOWN )
 777             continue;
 778         i_streams++;
 779         if( p_sys->asfh.stream[i].i_selected )
 780             i_streams_selected++;
 781     }
 782     if( i_streams_selected <= 0 )
 783     {
 784         msg_Err( p_access, "no stream selected" );
 785         return VLC_EGENERIC;
 786     }
 787
 788     if( OpenConnection( p_access ) )
 789         return VLC_EGENERIC;
 790
 791     net_Printf( p_access, p_sys->fd, NULL,
 792                 "Accept: */*\r\n"
 793                 "User-Agent: "MMSH_USER_AGENT"\r\n" );
 794     if( p_sys->b_broadcast )
 795     {
 796         net_Printf( p_access, p_sys->fd, NULL,
 797                     "Pragma: no-cache,rate=1.000000,request-context=%d\r\n",
 798                     p_sys->i_request_context++ );
 799     }
 800     else
 801     {
 802         net_Printf( p_access, p_sys->fd, NULL,
 803                     "Pragma: no-cache,rate=1.000000,stream-time=0,stream-offset=%u:%u,request-context=%d,max-duration=0\r\n",
 804                     (uint32_t)((i_pos >> 32)&0xffffffff),
 805                     (uint32_t)(i_pos&0xffffffff),
 806                     p_sys->i_request_context++ );
 807     }
 808     net_Printf( p_access, p_sys->fd, NULL,
 809                 "Pragma: xPlayStrm=1\r\n"
 810                 "Pragma: xClientGUID={"GUID_FMT"}\r\n"
 811                 "Pragma: stream-switch-count=%d\r\n"
 812                 "Pragma: stream-switch-entry=",
 813                 GUID_PRINT( p_sys->guid ),
 814                 i_streams);
 815
 816     for( i = 1; i < 128; i++ )
 817     {
 818         if( p_sys->asfh.stream[i].i_cat != ASF_STREAM_UNKNOWN )
 819         {
 820             int i_select = 2;
 821             if( p_sys->asfh.stream[i].i_selected )
 822             {
 823                 i_select = 0;
 824             }
 825             net_Printf( p_access, p_sys->fd, NULL,
 826                         "ffff:%d:%d ", i, i_select );
 827         }
 828     }
 829     net_Printf( p_access, p_sys->fd, NULL, "\r\n" );
 830     net_Printf( p_access, p_sys->fd, NULL,
 831                 "Connection: Close\r\n" );
 832
 833     if( net_Printf( p_access, p_sys->fd, NULL, "\r\n" ) < 0 )
 834     {
 835         msg_Err( p_access, "failed to send request" );
 836         return VLC_EGENERIC;
 837     }
 838
 839     psz = net_Gets( p_access, p_sys->fd, NULL );
 840     if( psz == NULL )
 841     {
 842         msg_Err( p_access, "cannot read data 0" );
 843         return VLC_EGENERIC;
 844     }
 845
 846     if( atoi( &psz[9] ) >= 400 )
 847     {
 848         msg_Err( p_access, "error: %s", psz );
 849         free( psz );
 850         return VLC_EGENERIC;
 851     }
 852     msg_Dbg( p_access, "HTTP reply '%s'", psz );
 853     free( psz );
 854
 855     /* FIXME check HTTP code */
 856     for( ;; )
 857     {
 858         char *psz = net_Gets( p_access, p_sys->fd, NULL );
 859         if( psz == NULL )
 860         {
 861             msg_Err( p_access, "cannot read data 1" );
 862             return VLC_EGENERIC;
 863         }
 864         if( *psz == '\0' )
 865         {
 866             free( psz );
 867             break;
 868         }
 869         msg_Dbg( p_access, "%s", psz );
 870         free( psz );
 871     }
 872
 873     p_sys->i_packet_used   = 0;
 874     p_sys->i_packet_length = 0;
 875
 876     return VLC_SUCCESS;
 877 }
 878
 879 /*****************************************************************************
 880  * closing stream
 881  *****************************************************************************/
 882 static void Stop( access_t *p_access )
 883 {
 884     access_sys_t *p_sys = p_access->p_sys;
 885
 886     msg_Dbg( p_access, "closing stream" );
 887     if( p_sys->fd > 0 )
 888     {
 889         net_Close( p_sys->fd );
 890         p_sys->fd = -1;
 891     }
 892 }
 893
 894 /*****************************************************************************
 895  * get packet
 896  *****************************************************************************/
 897 static int GetPacket( access_t * p_access, chunk_t *p_ck )
 898 {
 899     access_sys_t *p_sys = p_access->p_sys;
 900     int restsize;
 901
 902     /* chunk_t */
 903     memset( p_ck, 0, sizeof( chunk_t ) );
 904
 905     /* Read the chunk header */
 906     /* Some headers are short, like 0x4324. Reading 12 bytes will cause us
 907      * to lose synchronization with the stream. Just read to the length
 908      * (4 bytes), decode and then read up to 8 additional bytes to get the
 909      * entire header.
 910      */
 911     if( net_Read( p_access, p_sys->fd, NULL, p_sys->buffer, 4, true ) < 4 )
 912     {
 913        msg_Err( p_access, "cannot read data 2" );
 914        return VLC_EGENERIC;
 915     }
 916
 917     p_ck->i_type = GetWLE( p_sys->buffer);
 918     p_ck->i_size = GetWLE( p_sys->buffer + 2);
 919
 920     restsize = p_ck->i_size;
 921     if( restsize > 8 )
 922         restsize = 8;
 923
 924     if( net_Read( p_access, p_sys->fd, NULL, p_sys->buffer + 4, restsize, true ) < restsize )
 925     {
 926         msg_Err( p_access, "cannot read data 3" );
 927         return VLC_EGENERIC;
 928     }
 929     p_ck->i_sequence  = GetDWLE( p_sys->buffer + 4);
 930     p_ck->i_unknown   = GetWLE( p_sys->buffer + 8);
 931
 932     /* Set i_size2 to 8 if this header was short, since a real value won't be
 933      * present in the buffer. Using 8 avoid reading additional data for the
 934      * packet.
 935      */
 936     if( restsize < 8 )
 937         p_ck->i_size2 = 8;
 938     else
 939         p_ck->i_size2 = GetWLE( p_sys->buffer + 10);
 940
 941     p_ck->p_data      = p_sys->buffer + 12;
 942     p_ck->i_data      = p_ck->i_size2 - 8;
 943
 944     if( p_ck->i_type == 0x4524 )   // Transfer complete
 945     {
 946         if( p_ck->i_sequence == 0 )
 947         {
 948             msg_Warn( p_access, "EOF" );
 949             return VLC_EGENERIC;
 950         }
 951         else
 952         {
 953             msg_Warn( p_access, "next stream following" );
 954             return VLC_EGENERIC;
 955         }
 956     }
 957     else if( p_ck->i_type == 0x4324 )
 958     {
 959         /* 0x4324 is CHUNK_TYPE_RESET: a new stream will follow with a sequence of 0 */
 960         msg_Warn( p_access, "next stream following (reset) seq=%d", p_ck->i_sequence  );
 961         return VLC_EGENERIC;
 962     }
 963     else if( (p_ck->i_type != 0x4824) && (p_ck->i_type != 0x4424) )
 964     {
 965         msg_Err( p_access, "invalid chunk FATAL (0x%x)", p_ck->i_type );
 966         return VLC_EGENERIC;
 967     }
 968
 969     if( (p_ck->i_data > 0) &&
 970         (net_Read( p_access, p_sys->fd, NULL, &p_sys->buffer[12],
 971                    p_ck->i_data, true ) < p_ck->i_data) )
 972     {
 973         msg_Err( p_access, "cannot read data 4" );
 974         return VLC_EGENERIC;
 975     }
 976
 977 #if 0
 978     if( (p_sys->i_packet_sequence != 0) &&
 979         (p_ck->i_sequence != p_sys->i_packet_sequence) )
 980     {
 981         msg_Warn( p_access, "packet lost ? (%d != %d)", p_ck->i_sequence, p_sys->i_packet_sequence );
 982     }
 983 #endif
 984
 985     p_sys->i_packet_sequence = p_ck->i_sequence + 1;
 986     p_sys->i_packet_used   = 0;
 987     p_sys->i_packet_length = p_ck->i_data;
 988     p_sys->p_packet        = p_ck->p_data;
 989
 990     return VLC_SUCCESS;
 991 }