modules/access_output/livehttp.c

   1 /*****************************************************************************
   2  * livehttp.c: Live HTTP Streaming
   3  *****************************************************************************
   4  * Copyright © 2001, 2002, 2013 VLC authors and VideoLAN
   5  * Copyright © 2009-2010 by Keary Griffin
   6  *
   7  * Authors: Keary Griffin <kearygriffin at gmail.com>
   8  *          Ilkka Ollakka <ileoo at videolan dot org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU Lesser General Public License as published by
  12  * the Free Software Foundation; either version 2.1 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program 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 Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public License
  21  * along with this program; if not, write to the Free Software Foundation,
  22  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <sys/types.h>
  34 #include <time.h>
  35 #include <fcntl.h>
  36 #include <errno.h>
  37 #ifdef HAVE_UNISTD_H
  38 # include <unistd.h>
  39 #endif
  40
  41 #include <vlc_common.h>
  42 #include <vlc_plugin.h>
  43 #include <vlc_sout.h>
  44 #include <vlc_block.h>
  45 #include <vlc_fs.h>
  46 #include <vlc_strings.h>
  47 #include <vlc_charset.h>
  48
  49 #include <gcrypt.h>
  50 #include <vlc_gcrypt.h>
  51
  52 #include <vlc_rand.h>
  53
  54 #ifndef O_LARGEFILE
  55 #   define O_LARGEFILE 0
  56 #endif
  57
  58 #define STR_ENDLIST "#EXT-X-ENDLIST\n"
  59
  60 #define MAX_RENAME_RETRIES        10
  61
  62 /*****************************************************************************
  63  * Module descriptor
  64  *****************************************************************************/
  65 static int  Open ( vlc_object_t * );
  66 static void Close( vlc_object_t * );
  67
  68 #define SOUT_CFG_PREFIX "sout-livehttp-"
  69 #define SEGLEN_TEXT N_("Segment length")
  70 #define SEGLEN_LONGTEXT N_("Length of TS stream segments")
  71
  72 #define SPLITANYWHERE_TEXT N_("Split segments anywhere")
  73 #define SPLITANYWHERE_LONGTEXT N_("Don't require a keyframe before splitting "\
  74                                 "a segment. Needed for audio only.")
  75
  76 #define NUMSEGS_TEXT N_("Number of segments")
  77 #define NUMSEGS_LONGTEXT N_("Number of segments to include in index")
  78
  79 #define NOCACHE_TEXT N_("Allow cache")
  80 #define NOCACHE_LONGTEXT N_("Add EXT-X-ALLOW-CACHE:NO directive in playlist-file if this is disabled")
  81
  82 #define INDEX_TEXT N_("Index file")
  83 #define INDEX_LONGTEXT N_("Path to the index file to create")
  84
  85 #define INDEXURL_TEXT N_("Full URL to put in index file")
  86 #define INDEXURL_LONGTEXT N_("Full URL to put in index file. "\
  87                           "Use #'s to represent segment number")
  88
  89 #define DELSEGS_TEXT N_("Delete segments")
  90 #define DELSEGS_LONGTEXT N_("Delete segments when they are no longer needed")
  91
  92 #define RATECONTROL_TEXT N_("Use muxers rate control mechanism")
  93
  94 #define KEYURI_TEXT N_("AES key URI to place in playlist")
  95 #define KEYURI_LONGTEXT N_("Location from where client will retrieve the stream decryption key")
  96
  97 #define KEYFILE_TEXT N_("AES key file")
  98 #define KEYFILE_LONGTEXT N_("File containing the 16 bytes encryption key")
  99
 100 #define KEYLOADFILE_TEXT N_("File where vlc reads key-uri and keyfile-location")
 101 #define KEYLOADFILE_LONGTEXT N_("File is read when segment starts and is assumet to be in format: "\
 102                                 "key-uri\\nkey-file. File is read on the segment opening and "\
 103                                 "values are used on that segment.")
 104
 105 #define RANDOMIV_TEXT N_("Use randomized IV for encryption")
 106 #define RANDOMIV_LONGTEXT N_("Generate IV instead using segment-number as IV")
 107
 108 vlc_module_begin ()
 109     set_description( N_("HTTP Live streaming output") )
 110     set_shortname( N_("LiveHTTP" ))
 111     add_shortcut( "livehttp" )
 112     set_capability( "sout access", 0 )
 113     set_category( CAT_SOUT )
 114     set_subcategory( SUBCAT_SOUT_ACO )
 115     add_integer( SOUT_CFG_PREFIX "seglen", 10, SEGLEN_TEXT, SEGLEN_LONGTEXT, false )
 116     add_integer( SOUT_CFG_PREFIX "numsegs", 0, NUMSEGS_TEXT, NUMSEGS_LONGTEXT, false )
 117     add_bool( SOUT_CFG_PREFIX "splitanywhere", false,
 118               SPLITANYWHERE_TEXT, SPLITANYWHERE_LONGTEXT, true )
 119     add_bool( SOUT_CFG_PREFIX "delsegs", true,
 120               DELSEGS_TEXT, DELSEGS_LONGTEXT, true )
 121     add_bool( SOUT_CFG_PREFIX "ratecontrol", false,
 122               RATECONTROL_TEXT, RATECONTROL_TEXT, true )
 123     add_bool( SOUT_CFG_PREFIX "caching", false,
 124               NOCACHE_TEXT, NOCACHE_LONGTEXT, true )
 125     add_bool( SOUT_CFG_PREFIX "generate-iv", false,
 126               RANDOMIV_TEXT, RANDOMIV_LONGTEXT, true )
 127     add_string( SOUT_CFG_PREFIX "index", NULL,
 128                 INDEX_TEXT, INDEX_LONGTEXT, false )
 129     add_string( SOUT_CFG_PREFIX "index-url", NULL,
 130                 INDEXURL_TEXT, INDEXURL_LONGTEXT, false )
 131     add_string( SOUT_CFG_PREFIX "key-uri", NULL,
 132                 KEYURI_TEXT, KEYURI_TEXT, true )
 133     add_loadfile( SOUT_CFG_PREFIX "key-file", NULL,
 134                 KEYFILE_TEXT, KEYFILE_LONGTEXT, true )
 135     add_loadfile( SOUT_CFG_PREFIX "key-loadfile", NULL,
 136                 KEYLOADFILE_TEXT, KEYLOADFILE_LONGTEXT, true )
 137     set_callbacks( Open, Close )
 138 vlc_module_end ()
 139
 140
 141 /*****************************************************************************
 142  * Exported prototypes
 143  *****************************************************************************/
 144 static const char *const ppsz_sout_options[] = {
 145     "seglen",
 146     "splitanywhere",
 147     "numsegs",
 148     "delsegs",
 149     "index",
 150     "index-url",
 151     "ratecontrol",
 152     "caching",
 153     "key-uri",
 154     "key-file",
 155     "key-loadfile",
 156     "generate-iv",
 157     NULL
 158 };
 159
 160 static ssize_t Write( sout_access_out_t *, block_t * );
 161 static int Seek ( sout_access_out_t *, off_t  );
 162 static int Control( sout_access_out_t *, int, va_list );
 163
 164 typedef struct output_segment
 165 {
 166     char *psz_filename;
 167     char *psz_uri;
 168     char *psz_key_uri;
 169     char *psz_duration;
 170     uint32_t i_segment_number;
 171     uint8_t aes_ivs[16];
 172 } output_segment_t;
 173
 174 struct sout_access_out_sys_t
 175 {
 176     char *psz_cursegPath;
 177     char *psz_indexPath;
 178     char *psz_indexUrl;
 179     char *psz_keyfile;
 180     mtime_t i_keyfile_modification;
 181     mtime_t i_opendts;
 182     mtime_t  i_seglenm;
 183     uint32_t i_segment;
 184     size_t  i_seglen;
 185     float   f_seglen;
 186     block_t *block_buffer;
 187     int i_handle;
 188     unsigned i_numsegs;
 189     bool b_delsegs;
 190     bool b_ratecontrol;
 191     bool b_splitanywhere;
 192     bool b_caching;
 193     bool b_generate_iv;
 194     uint8_t aes_ivs[16];
 195     gcry_cipher_hd_t aes_ctx;
 196     char *key_uri;
 197     uint8_t stuffing_bytes[16];
 198     ssize_t stuffing_size;
 199     vlc_array_t *segments_t;
 200 };
 201
 202 static int LoadCryptFile( sout_access_out_t *p_access);
 203 static int CryptSetup( sout_access_out_t *p_access, char *keyfile );
 204 /*****************************************************************************
 205  * Open: open the file
 206  *****************************************************************************/
 207 static int Open( vlc_object_t *p_this )
 208 {
 209     sout_access_out_t   *p_access = (sout_access_out_t*)p_this;
 210     sout_access_out_sys_t *p_sys;
 211     char *psz_idx;
 212
 213     config_ChainParse( p_access, SOUT_CFG_PREFIX, ppsz_sout_options, p_access->p_cfg );
 214
 215     if( !p_access->psz_path )
 216     {
 217         msg_Err( p_access, "no file name specified" );
 218         return VLC_EGENERIC;
 219     }
 220
 221     if( unlikely( !( p_sys = malloc ( sizeof( *p_sys ) ) ) ) )
 222         return VLC_ENOMEM;
 223
 224     p_sys->i_seglen = var_GetInteger( p_access, SOUT_CFG_PREFIX "seglen" );
 225     /* Try to get within asked segment length */
 226     p_sys->i_seglenm = CLOCK_FREQ * p_sys->i_seglen;
 227     p_sys->block_buffer = NULL;
 228
 229     p_sys->i_numsegs = var_GetInteger( p_access, SOUT_CFG_PREFIX "numsegs" );
 230     p_sys->b_splitanywhere = var_GetBool( p_access, SOUT_CFG_PREFIX "splitanywhere" );
 231     p_sys->b_delsegs = var_GetBool( p_access, SOUT_CFG_PREFIX "delsegs" );
 232     p_sys->b_ratecontrol = var_GetBool( p_access, SOUT_CFG_PREFIX "ratecontrol") ;
 233     p_sys->b_caching = var_GetBool( p_access, SOUT_CFG_PREFIX "caching") ;
 234     p_sys->b_generate_iv = var_GetBool( p_access, SOUT_CFG_PREFIX "generate-iv") ;
 235
 236     p_sys->segments_t = vlc_array_new();
 237
 238     p_sys->stuffing_size = 0;
 239
 240     p_sys->psz_indexPath = NULL;
 241     psz_idx = var_GetNonEmptyString( p_access, SOUT_CFG_PREFIX "index" );
 242     if ( psz_idx )
 243     {
 244         char *psz_tmp;
 245         psz_tmp = str_format_time( psz_idx );
 246         free( psz_idx );
 247         if ( !psz_tmp )
 248         {
 249             free( p_sys );
 250             return VLC_ENOMEM;
 251         }
 252         path_sanitize( psz_tmp );
 253         p_sys->psz_indexPath = psz_tmp;
 254         vlc_unlink( p_sys->psz_indexPath );
 255     }
 256
 257     p_sys->psz_indexUrl = var_GetNonEmptyString( p_access, SOUT_CFG_PREFIX "index-url" );
 258     p_sys->psz_keyfile  = var_GetNonEmptyString( p_access, SOUT_CFG_PREFIX "key-loadfile" );
 259     p_sys->key_uri      = var_GetNonEmptyString( p_access, SOUT_CFG_PREFIX "key-uri" );
 260
 261     p_access->p_sys = p_sys;
 262
 263     if( p_sys->psz_keyfile && ( LoadCryptFile( p_access ) < 0 ) )
 264     {
 265         free( p_sys->psz_indexUrl );
 266         free( p_sys->psz_indexPath );
 267         free( p_sys );
 268         msg_Err( p_access, "Encryption init failed" );
 269         return VLC_EGENERIC;
 270     }
 271     else if( !p_sys->psz_keyfile && ( CryptSetup( p_access, NULL ) < 0 ) )
 272     {
 273         free( p_sys->psz_indexUrl );
 274         free( p_sys->psz_indexPath );
 275         free( p_sys );
 276         msg_Err( p_access, "Encryption init failed" );
 277         return VLC_EGENERIC;
 278     }
 279
 280     p_sys->i_handle = -1;
 281     p_sys->i_segment = 0;
 282     p_sys->psz_cursegPath = NULL;
 283
 284     p_access->pf_write = Write;
 285     p_access->pf_seek  = Seek;
 286     p_access->pf_control = Control;
 287
 288     return VLC_SUCCESS;
 289 }
 290
 291 /************************************************************************
 292  * CryptSetup: Initialize encryption
 293  ************************************************************************/
 294 static int CryptSetup( sout_access_out_t *p_access, char *key_file )
 295 {
 296     sout_access_out_sys_t *p_sys = p_access->p_sys;
 297     uint8_t key[16];
 298     char *keyfile = NULL;
 299
 300     if( key_file )
 301         keyfile = strdup( key_file );
 302     else
 303         keyfile = var_InheritString( p_access, SOUT_CFG_PREFIX "key-file" );
 304
 305     if( !p_sys->key_uri ) /*No key uri, assume no encryption wanted*/
 306     {
 307         msg_Dbg( p_access, "No key uri, no encryption");
 308         return VLC_SUCCESS;
 309     }
 310     vlc_gcrypt_init();
 311
 312     /*Setup encryption cipher*/
 313     gcry_error_t err = gcry_cipher_open( &p_sys->aes_ctx, GCRY_CIPHER_AES,
 314                                          GCRY_CIPHER_MODE_CBC, 0 );
 315     if( err )
 316     {
 317         msg_Err( p_access, "Openin AES Cipher failed: %s", gpg_strerror(err));
 318         return VLC_EGENERIC;
 319     }
 320
 321     if( unlikely(keyfile == NULL) )
 322     {
 323         msg_Err( p_access, "No key-file, no encryption" );
 324         return VLC_EGENERIC;
 325     }
 326
 327     int keyfd = vlc_open( keyfile, O_RDONLY | O_NONBLOCK );
 328     if( unlikely( keyfd == -1 ) )
 329     {
 330         msg_Err( p_access, "Unable to open keyfile %s: %m", keyfile );
 331         free( keyfile );
 332         return VLC_EGENERIC;
 333     }
 334     free( keyfile );
 335
 336     ssize_t keylen = read( keyfd, key, 16 );
 337
 338     close( keyfd );
 339     if( keylen < 16 )
 340     {
 341         msg_Err( p_access, "No key at least 16 octects (you provided %zd), no encryption", keylen );
 342         return VLC_EGENERIC;
 343     }
 344
 345     err = gcry_cipher_setkey( p_sys->aes_ctx, key, 16 );
 346     if(err)
 347     {
 348         msg_Err(p_access, "Setting AES key failed: %s", gpg_strerror(err));
 349         gcry_cipher_close( p_sys->aes_ctx);
 350         return VLC_EGENERIC;
 351     }
 352
 353     if( p_sys->b_generate_iv )
 354         vlc_rand_bytes( p_sys->aes_ivs, sizeof(uint8_t)*16);
 355
 356     return VLC_SUCCESS;
 357 }
 358
 359
 360 /************************************************************************
 361  * LoadCryptFile: Try to parse key_uri and keyfile-location from file
 362  ************************************************************************/
 363 static int LoadCryptFile( sout_access_out_t *p_access )
 364 {
 365     sout_access_out_sys_t *p_sys = p_access->p_sys;
 366
 367     FILE *stream = vlc_fopen( p_sys->psz_keyfile, "rt" );
 368     char *key_file=NULL,*key_uri=NULL;
 369
 370     if( unlikely( stream == NULL ) )
 371     {
 372         msg_Err( p_access, "Unable to open keyloadfile %s: %m", p_sys->psz_keyfile );
 373         return VLC_EGENERIC;
 374     }
 375
 376
 377     //First read key_uri
 378     ssize_t len = getline( &key_uri, &(size_t){0}, stream );
 379     if( unlikely( len == -1 ) )
 380     {
 381         msg_Err( p_access, "Cannot read %s: %m", p_sys->psz_keyfile );
 382         clearerr( stream );
 383         fclose( stream );
 384         free( key_uri );
 385         return VLC_EGENERIC;
 386     }
 387     //Strip the newline from uri, maybe scanf would be better?
 388     key_uri[len-1]='\0';
 389
 390     len = getline( &key_file, &(size_t){0}, stream );
 391     if( unlikely( len == -1 ) )
 392     {
 393         msg_Err( p_access, "Cannot read %s: %m", p_sys->psz_keyfile );
 394         clearerr( stream );
 395         fclose( stream );
 396
 397         free( key_uri );
 398         free( key_file );
 399         return VLC_EGENERIC;
 400     }
 401     // Strip the last newline from filename
 402     key_file[len-1]='\0';
 403     fclose( stream );
 404
 405     int returncode = VLC_SUCCESS;
 406     if( !p_sys->key_uri || strcmp( p_sys->key_uri, key_uri ) )
 407     {
 408         if( p_sys->key_uri )
 409         {
 410             free( p_sys->key_uri );
 411             p_sys->key_uri = NULL;
 412         }
 413         p_sys->key_uri = strdup( key_uri );
 414         returncode = CryptSetup( p_access, key_file );
 415     }
 416     free( key_file );
 417     free( key_uri );
 418     return returncode;
 419 }
 420
 421 /************************************************************************
 422  * CryptKey: Set encryption IV to current segment number
 423  ************************************************************************/
 424 static int CryptKey( sout_access_out_t *p_access, uint32_t i_segment )
 425 {
 426     sout_access_out_sys_t *p_sys = p_access->p_sys;
 427
 428     if( !p_sys->b_generate_iv )
 429     {
 430         /* Use segment number as IV if randomIV isn't selected*/
 431         memset( p_sys->aes_ivs, 0, 16 * sizeof(uint8_t));
 432         p_sys->aes_ivs[15] = i_segment & 0xff;
 433         p_sys->aes_ivs[14] = (i_segment >> 8 ) & 0xff;
 434         p_sys->aes_ivs[13] = (i_segment >> 16 ) & 0xff;
 435         p_sys->aes_ivs[12] = (i_segment >> 24 ) & 0xff;
 436     }
 437
 438     gcry_error_t err = gcry_cipher_setiv( p_sys->aes_ctx,
 439                                           p_sys->aes_ivs, 16);
 440     if( err )
 441     {
 442         msg_Err(p_access, "Setting AES IVs failed: %s", gpg_strerror(err) );
 443         gcry_cipher_close( p_sys->aes_ctx);
 444         return VLC_EGENERIC;
 445     }
 446     return VLC_SUCCESS;
 447 }
 448
 449
 450 #define SEG_NUMBER_PLACEHOLDER "#"
 451 /*****************************************************************************
 452  * formatSegmentPath: create segment path name based on seg #
 453  *****************************************************************************/
 454 static char *formatSegmentPath( char *psz_path, uint32_t i_seg, bool b_sanitize )
 455 {
 456     char *psz_result;
 457     char *psz_firstNumSign;
 458
 459     if ( ! ( psz_result  = str_format_time( psz_path ) ) )
 460         return NULL;
 461
 462     psz_firstNumSign = psz_result + strcspn( psz_result, SEG_NUMBER_PLACEHOLDER );
 463     if ( *psz_firstNumSign )
 464     {
 465         char *psz_newResult;
 466         int i_cnt = strspn( psz_firstNumSign, SEG_NUMBER_PLACEHOLDER );
 467         int ret;
 468
 469         *psz_firstNumSign = '\0';
 470         ret = asprintf( &psz_newResult, "%s%0*d%s", psz_result, i_cnt, i_seg, psz_firstNumSign + i_cnt );
 471         free ( psz_result );
 472         if ( ret < 0 )
 473             return NULL;
 474         psz_result = psz_newResult;
 475     }
 476
 477     if ( b_sanitize )
 478         path_sanitize( psz_result );
 479
 480     return psz_result;
 481 }
 482
 483 static void destroySegment( output_segment_t *segment )
 484 {
 485     free( segment->psz_filename );
 486     free( segment->psz_duration );
 487     free( segment->psz_uri );
 488     free( segment->psz_key_uri );
 489     free( segment );
 490 }
 491
 492 /************************************************************************
 493  * updateIndexAndDel: If necessary, update index file & delete old segments
 494  ************************************************************************/
 495 static int updateIndexAndDel( sout_access_out_t *p_access, sout_access_out_sys_t *p_sys, bool b_isend )
 496 {
 497
 498     uint32_t i_firstseg;
 499
 500     if ( p_sys->i_numsegs == 0 || p_sys->i_segment < p_sys->i_numsegs )
 501         i_firstseg = 1;
 502     else
 503         i_firstseg = ( p_sys->i_segment - p_sys->i_numsegs ) + 1;
 504
 505     // First update index
 506     if ( p_sys->psz_indexPath )
 507     {
 508         int val;
 509         FILE *fp;
 510         char *psz_idxTmp;
 511         if ( asprintf( &psz_idxTmp, "%s.tmp", p_sys->psz_indexPath ) < 0)
 512             return -1;
 513
 514         fp = vlc_fopen( psz_idxTmp, "wt");
 515         if ( !fp )
 516         {
 517             msg_Err( p_access, "cannot open index file `%s'", psz_idxTmp );
 518             free( psz_idxTmp );
 519             return -1;
 520         }
 521
 522         if ( fprintf( fp, "#EXTM3U\n#EXT-X-TARGETDURATION:%zu\n#EXT-X-VERSION:3\n#EXT-X-ALLOW-CACHE:%s"
 523                           "%s\n#EXT-X-MEDIA-SEQUENCE:%"PRIu32"\n", p_sys->i_seglen,
 524                           p_sys->b_caching ? "YES" : "NO",
 525                           p_sys->i_numsegs > 0 ? "" : b_isend ? "\n#EXT-X-PLAYLIST-TYPE:VOD" : "\n#EXT-X-PLAYLIST-TYPE:EVENT",
 526                           i_firstseg ) < 0 )
 527         {
 528             free( psz_idxTmp );
 529             fclose( fp );
 530             return -1;
 531         }
 532         char *psz_current_uri=NULL;
 533
 534
 535         for ( uint32_t i = i_firstseg; i <= p_sys->i_segment; i++ )
 536         {
 537             //scale to 0..numsegs-1
 538             uint32_t index = i-i_firstseg;
 539
 540             output_segment_t *segment = (output_segment_t *)vlc_array_item_at_index( p_sys->segments_t, index );
 541             if( p_sys->key_uri &&
 542                 ( !psz_current_uri ||  strcmp( psz_current_uri, segment->psz_key_uri ) )
 543               )
 544             {
 545                 int ret = 0;
 546                 free( psz_current_uri );
 547                 psz_current_uri = strdup( segment->psz_key_uri );
 548                 if( p_sys->b_generate_iv )
 549                 {
 550                     unsigned long long iv_hi = 0, iv_lo = 0;
 551                     for( unsigned short i = 0; i < 8; i++ )
 552                     {
 553                         iv_hi |= segment->aes_ivs[i] & 0xff;
 554                         iv_hi <<= 8;
 555                         iv_lo |= segment->aes_ivs[8+i] & 0xff;
 556                         iv_lo <<= 8;
 557                     }
 558                     ret = fprintf( fp, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\",IV=0X%16.16llx%16.16llx\n",
 559                                    segment->psz_key_uri, iv_hi, iv_lo );
 560
 561                 } else {
 562                     ret = fprintf( fp, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\"\n", segment->psz_key_uri );
 563                 }
 564                 if( ret < 0 )
 565                 {
 566                     free( psz_idxTmp );
 567                     fclose( fp );
 568                     return -1;
 569                 }
 570             }
 571
 572             val = fprintf( fp, "#EXTINF:%s,\n%s\n", segment->psz_duration, segment->psz_uri);
 573             if ( val < 0 )
 574             {
 575                 fclose( fp );
 576                 return -1;
 577             }
 578         }
 579         free( psz_current_uri );
 580
 581         if ( b_isend )
 582         {
 583             if ( fputs ( STR_ENDLIST, fp ) < 0)
 584             {
 585                 free( psz_idxTmp );
 586                 fclose( fp ) ;
 587                 return -1;
 588             }
 589
 590         }
 591         fclose( fp );
 592
 593         val = vlc_rename ( psz_idxTmp, p_sys->psz_indexPath);
 594
 595         if ( val < 0 )
 596         {
 597             vlc_unlink( psz_idxTmp );
 598             msg_Err( p_access, "Error moving LiveHttp index file" );
 599         }
 600         else
 601             msg_Dbg( p_access, "LiveHttpIndexComplete: %s" , p_sys->psz_indexPath );
 602
 603         free( psz_idxTmp );
 604     }
 605
 606     // Then take care of deletion
 607     while( p_sys->b_delsegs && p_sys->i_numsegs && ( (vlc_array_count( p_sys->segments_t ) ) >= p_sys->i_numsegs ) )
 608     {
 609          output_segment_t *segment = vlc_array_item_at_index( p_sys->segments_t, 0 );
 610          vlc_array_remove( p_sys->segments_t, 0 );
 611          if ( segment->psz_filename )
 612          {
 613              vlc_unlink( segment->psz_filename );
 614          }
 615          destroySegment( segment );
 616     }
 617
 618
 619     return 0;
 620 }
 621
 622 /*****************************************************************************
 623  * closeCurrentSegment: Close the segment file
 624  *****************************************************************************/
 625 static void closeCurrentSegment( sout_access_out_t *p_access, sout_access_out_sys_t *p_sys, bool b_isend )
 626 {
 627     if ( p_sys->i_handle >= 0 )
 628     {
 629         output_segment_t *segment = (output_segment_t *)vlc_array_item_at_index( p_sys->segments_t, vlc_array_count( p_sys->segments_t ) - 1 );
 630
 631         if( p_sys->key_uri )
 632         {
 633             size_t pad = 16 - p_sys->stuffing_size;
 634             memset(&p_sys->stuffing_bytes[p_sys->stuffing_size], pad, pad);
 635             gcry_error_t err = gcry_cipher_encrypt( p_sys->aes_ctx, p_sys->stuffing_bytes, 16, NULL, 0 );
 636
 637             if( err ) {
 638                msg_Err( p_access, "Couldn't encrypt 16 bytes: %s", gpg_strerror(err) );
 639             } else {
 640             int ret = write( p_sys->i_handle, p_sys->stuffing_bytes, 16 );
 641             if( ret != 16 )
 642                 msg_Err( p_access, "Couldn't write 16 bytes" );
 643             }
 644             p_sys->stuffing_size = 0;
 645         }
 646
 647
 648         close( p_sys->i_handle );
 649         p_sys->i_handle = -1;
 650
 651         if( ! ( us_asprintf( &segment->psz_duration, "%.2f", p_sys->f_seglen ) ) )
 652         {
 653             msg_Err( p_access, "Couldn't set duration on closed segment");
 654             return;
 655         }
 656
 657         segment->i_segment_number = p_sys->i_segment;
 658
 659         if ( p_sys->psz_cursegPath )
 660         {
 661             msg_Dbg( p_access, "LiveHttpSegmentComplete: %s (%"PRIu32")" , p_sys->psz_cursegPath, p_sys->i_segment );
 662             free( p_sys->psz_cursegPath );
 663             p_sys->psz_cursegPath = 0;
 664             updateIndexAndDel( p_access, p_sys, b_isend );
 665         }
 666     }
 667 }
 668
 669 /*****************************************************************************
 670  * Close: close the target
 671  *****************************************************************************/
 672 static void Close( vlc_object_t * p_this )
 673 {
 674     sout_access_out_t *p_access = (sout_access_out_t*)p_this;
 675     sout_access_out_sys_t *p_sys = p_access->p_sys;
 676
 677     msg_Dbg( p_access, "Flushing buffer to last file");
 678     bool crypted = false;
 679     while( p_sys->block_buffer )
 680     {
 681         if( p_sys->key_uri && !crypted)
 682         {
 683             if( p_sys->stuffing_size )
 684             {
 685                 p_sys->block_buffer = block_Realloc( p_sys->block_buffer, p_sys->stuffing_size, p_sys->block_buffer->i_buffer );
 686                 if( unlikely(!p_sys->block_buffer) )
 687                     return;
 688                 memcpy( p_sys->block_buffer->p_buffer, p_sys->stuffing_bytes, p_sys->stuffing_size );
 689                 p_sys->stuffing_size = 0;
 690             }
 691             size_t original = p_sys->block_buffer->i_buffer;
 692             size_t padded = (original + 15 ) & ~15;
 693             size_t pad = padded - original;
 694             if( pad )
 695             {
 696                 p_sys->stuffing_size = 16 - pad;
 697                 p_sys->block_buffer->i_buffer -= p_sys->stuffing_size;
 698                 memcpy( p_sys->stuffing_bytes, &p_sys->block_buffer->p_buffer[p_sys->block_buffer->i_buffer], p_sys->stuffing_size );
 699             }
 700
 701             gcry_error_t err = gcry_cipher_encrypt( p_sys->aes_ctx,
 702                                 p_sys->block_buffer->p_buffer, p_sys->block_buffer->i_buffer, NULL, 0 );
 703             if( err )
 704             {
 705                 msg_Err( p_access, "Encryption failure: %s ", gpg_strerror(err) );
 706                 break;
 707             }
 708             crypted = true;
 709         }
 710         ssize_t val = write( p_sys->i_handle, p_sys->block_buffer->p_buffer, p_sys->block_buffer->i_buffer );
 711         if ( val == -1 )
 712         {
 713            if ( errno == EINTR )
 714               continue;
 715            block_ChainRelease ( p_sys->block_buffer);
 716            break;
 717         }
 718         if( !p_sys->block_buffer->p_next )
 719         {
 720             p_sys->f_seglen = (float)( p_sys->block_buffer->i_length / (1000000)) +
 721                                (float)(p_sys->block_buffer->i_dts - p_sys->i_opendts) / CLOCK_FREQ;
 722         }
 723
 724         if ( likely( (size_t)val >= p_sys->block_buffer->i_buffer ) )
 725         {
 726            block_t *p_next = p_sys->block_buffer->p_next;
 727            block_Release (p_sys->block_buffer);
 728            p_sys->block_buffer = p_next;
 729            crypted=false;
 730         }
 731         else
 732         {
 733            p_sys->block_buffer->p_buffer += val;
 734            p_sys->block_buffer->i_buffer -= val;
 735         }
 736     }
 737
 738     closeCurrentSegment( p_access, p_sys, true );
 739
 740     if( p_sys->key_uri )
 741     {
 742         gcry_cipher_close( p_sys->aes_ctx );
 743         free( p_sys->key_uri );
 744     }
 745
 746     while( vlc_array_count( p_sys->segments_t ) > 0 )
 747     {
 748         output_segment_t *segment = vlc_array_item_at_index( p_sys->segments_t, 0 );
 749         vlc_array_remove( p_sys->segments_t, 0 );
 750         destroySegment( segment );
 751     }
 752     vlc_array_destroy( p_sys->segments_t );
 753
 754     free( p_sys->psz_indexUrl );
 755     free( p_sys->psz_indexPath );
 756     free( p_sys );
 757
 758     msg_Dbg( p_access, "livehttp access output closed" );
 759 }
 760
 761 static int Control( sout_access_out_t *p_access, int i_query, va_list args )
 762 {
 763     sout_access_out_sys_t *p_sys = p_access->p_sys;
 764
 765     switch( i_query )
 766     {
 767         case ACCESS_OUT_CONTROLS_PACE:
 768         {
 769             bool *pb = va_arg( args, bool * );
 770             *pb = !p_sys->b_ratecontrol;
 771             //*pb = true;
 772             break;
 773         }
 774
 775         default:
 776             return VLC_EGENERIC;
 777     }
 778     return VLC_SUCCESS;
 779 }
 780
 781 /*****************************************************************************
 782  * openNextFile: Open the segment file
 783  *****************************************************************************/
 784 static ssize_t openNextFile( sout_access_out_t *p_access, sout_access_out_sys_t *p_sys )
 785 {
 786     int fd;
 787
 788     uint32_t i_newseg = p_sys->i_segment + 1;
 789
 790     /* Create segment and fill it info that we can (everything excluding duration */
 791     output_segment_t *segment = (output_segment_t*)malloc(sizeof(output_segment_t));
 792     if( unlikely( !segment ) )
 793         return -1;
 794
 795     memset( segment, 0 , sizeof( output_segment_t ) );
 796
 797     segment->i_segment_number = i_newseg;
 798     segment->psz_filename = formatSegmentPath( p_access->psz_path, i_newseg, true );
 799     char *psz_idxFormat = p_sys->psz_indexUrl ? p_sys->psz_indexUrl : p_access->psz_path;
 800     segment->psz_uri = formatSegmentPath( psz_idxFormat , i_newseg, false );
 801
 802     if ( unlikely( !segment->psz_filename ) )
 803     {
 804         msg_Err( p_access, "Format segmentpath failed");
 805         return -1;
 806     }
 807
 808     fd = vlc_open( segment->psz_filename, O_WRONLY | O_CREAT | O_LARGEFILE |
 809                      O_TRUNC, 0666 );
 810     if ( fd == -1 )
 811     {
 812         msg_Err( p_access, "cannot open `%s' (%m)", segment->psz_filename );
 813         destroySegment( segment );
 814         return -1;
 815     }
 816
 817     vlc_array_append( p_sys->segments_t, segment);
 818
 819     if( p_sys->psz_keyfile )
 820     {
 821         LoadCryptFile( p_access );
 822     }
 823
 824     if( p_sys->key_uri )
 825     {
 826         segment->psz_key_uri = strdup( p_sys->key_uri );
 827         CryptKey( p_access, i_newseg );
 828         if( p_sys->b_generate_iv )
 829             memcpy( segment->aes_ivs, p_sys->aes_ivs, sizeof(uint8_t)*16 );
 830     }
 831     msg_Dbg( p_access, "Successfully opened livehttp file: %s (%"PRIu32")" , segment->psz_filename, i_newseg );
 832
 833     p_sys->psz_cursegPath = strdup(segment->psz_filename);
 834     p_sys->i_handle = fd;
 835     p_sys->i_segment = i_newseg;
 836     return fd;
 837 }
 838
 839 /*****************************************************************************
 840  * Write: standard write on a file descriptor.
 841  *****************************************************************************/
 842 static ssize_t Write( sout_access_out_t *p_access, block_t *p_buffer )
 843 {
 844     size_t i_write = 0;
 845     sout_access_out_sys_t *p_sys = p_access->p_sys;
 846     block_t *p_temp;
 847
 848     while( p_buffer )
 849     {
 850         if ( ( p_sys->b_splitanywhere || ( p_buffer->i_flags & BLOCK_FLAG_HEADER ) ) )
 851         {
 852             bool crypted = false;
 853             block_t *output = p_sys->block_buffer;
 854             p_sys->block_buffer = NULL;
 855
 856
 857             if( p_sys->i_handle > 0 &&
 858                 ( p_buffer->i_dts - p_sys->i_opendts +
 859                   p_buffer->i_length * CLOCK_FREQ / INT64_C(1000000)
 860                 ) >= p_sys->i_seglenm )
 861                 closeCurrentSegment( p_access, p_sys, false );
 862
 863             if ( p_sys->i_handle < 0 )
 864             {
 865                 p_sys->i_opendts = output ? output->i_dts : p_buffer->i_dts;
 866                 if ( openNextFile( p_access, p_sys ) < 0 )
 867                    return -1;
 868             }
 869
 870             while( output )
 871             {
 872                 if( p_sys->key_uri && !crypted )
 873                 {
 874                     if( p_sys->stuffing_size )
 875                     {
 876                         output = block_Realloc( output, p_sys->stuffing_size, output->i_buffer );
 877                         if( unlikely(!output ) )
 878                             return VLC_ENOMEM;
 879                         memcpy( output->p_buffer, p_sys->stuffing_bytes, p_sys->stuffing_size );
 880                         p_sys->stuffing_size = 0;
 881                     }
 882                     size_t original = output->i_buffer;
 883                     size_t padded = (output->i_buffer + 15 ) & ~15;
 884                     size_t pad = padded - original;
 885                     if( pad )
 886                     {
 887                         p_sys->stuffing_size = 16-pad;
 888                         output->i_buffer -= p_sys->stuffing_size;
 889                         memcpy(p_sys->stuffing_bytes, &output->p_buffer[output->i_buffer], p_sys->stuffing_size);
 890                     }
 891
 892                     gcry_error_t err = gcry_cipher_encrypt( p_sys->aes_ctx,
 893                                         output->p_buffer, output->i_buffer, NULL, 0 );
 894                     if( err )
 895                     {
 896                         msg_Err( p_access, "Encryption failure: %s ", gpg_strerror(err) );
 897                         return -1;
 898                     }
 899                     crypted=true;
 900
 901                 }
 902                 ssize_t val = write( p_sys->i_handle, output->p_buffer, output->i_buffer );
 903                 if ( val == -1 )
 904                 {
 905                    if ( errno == EINTR )
 906                       continue;
 907                    block_ChainRelease ( p_buffer );
 908                    return -1;
 909                 }
 910                 p_sys->f_seglen =
 911                     (float)output->i_length / INT64_C(1000000) +
 912                     (float)(output->i_dts - p_sys->i_opendts) / CLOCK_FREQ;
 913
 914                 if ( (size_t)val >= output->i_buffer )
 915                 {
 916                    block_t *p_next = output->p_next;
 917                    block_Release (output);
 918                    output = p_next;
 919                    crypted=false;
 920                 }
 921                 else
 922                 {
 923                    output->p_buffer += val;
 924                    output->i_buffer -= val;
 925                 }
 926                 i_write += val;
 927             }
 928         }
 929
 930         p_temp = p_buffer->p_next;
 931         p_buffer->p_next = NULL;
 932         block_ChainAppend( &p_sys->block_buffer, p_buffer );
 933         p_buffer = p_temp;
 934     }
 935
 936     return i_write;
 937 }
 938
 939 /*****************************************************************************
 940  * Seek: seek to a specific location in a file
 941  *****************************************************************************/
 942 static int Seek( sout_access_out_t *p_access, off_t i_pos )
 943 {
 944     (void) i_pos;
 945     msg_Err( p_access, "livehttp sout access cannot seek" );
 946     return -1;
 947 }