1 /*****************************************************************************
2 * sap.c : SAP interface module
3 *****************************************************************************
4 * Copyright (C) 2004 VideoLAN
7 * Authors: Clément Stenac <zorglub@videolan.org>
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.
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.
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
32 #include <vlc/input.h>
36 #include <errno.h> /* ENOMEM */
41 #ifdef HAVE_SYS_TIME_H
42 # include <sys/time.h>
49 /************************************************************************
50 * Macros and definitions
51 ************************************************************************/
53 #define MAX_LINE_LENGTH 256
55 /* SAP is always on that port */
57 #define SAP_V4_ADDRESS "224.2.127.254"
60 #define IPV6_ADDR_1 "FF0" /* Scope is inserted between them */
61 #define IPV6_ADDR_2 "::2:7FFE"
64 /*****************************************************************************
66 *****************************************************************************/
67 #define SAP_ADDR_TEXT N_( "SAP multicast address" )
68 #define SAP_ADDR_LONGTEXT N_( "Listen for SAP announces on another address" )
69 #define SAP_IPV4_TEXT N_( "IPv4-SAP listening" )
70 #define SAP_IPV4_LONGTEXT N_( \
71 "Set this if you want the SAP module to listen to IPv4 announces " \
72 "on the standard address" )
73 #define SAP_IPV6_TEXT N_( "IPv6-SAP listening" )
74 #define SAP_IPV6_LONGTEXT N_( \
75 "Set this if you want the SAP module to listen to IPv6 announces " \
76 "on the standard address" )
77 #define SAP_SCOPE_TEXT N_( "IPv6 SAP scope" )
78 #define SAP_SCOPE_LONGTEXT N_( \
79 "Sets the scope for IPv6 announces (default is 8)" )
80 #define SAP_TIMEOUT_TEXT N_( "SAP timeout (seconds)" )
81 #define SAP_TIMEOUT_LONGTEXT N_( \
82 "Sets the time before SAP items get deleted if no new announce " \
84 #define SAP_PARSE_TEXT N_( "Try to parse the SAP" )
85 #define SAP_PARSE_LONGTEXT N_( \
86 "When SAP can it will try to parse the SAP. If you don't select " \
87 "this, all announces will be parsed by the livedotcom module" )
88 #define SAP_STRICT_TEXT N_( "SAP Strict mode" )
89 #define SAP_STRICT_LONGTEXT N_( \
90 "When this is set, the SAP parser will discard some non-compliant " \
92 #define SAP_CACHE_TEXT N_("Use SAP cache")
93 #define SAP_CACHE_LONGTEXT N_( \
94 "If this option is selected, a SAP caching mechanism will be used." \
95 "This will result in lower SAP startup time, but you could end up " \
96 "with items corresponding to legacy streams." )
99 static int Open ( vlc_object_t * );
100 static void Close( vlc_object_t * );
101 static int OpenDemux ( vlc_object_t * );
102 static void CloseDemux ( vlc_object_t * );
105 set_description( _("SAP interface") );
106 set_category( CAT_PLAYLIST );
107 set_subcategory( SUBCAT_PLAYLIST_SD );
109 add_string( "sap-addr", NULL, NULL,
110 SAP_ADDR_TEXT, SAP_ADDR_LONGTEXT, VLC_TRUE );
111 add_bool( "sap-ipv4", 1 , NULL,
112 SAP_IPV4_TEXT,SAP_IPV4_LONGTEXT, VLC_TRUE );
113 add_bool( "sap-ipv6", 0 , NULL,
114 SAP_IPV6_TEXT, SAP_IPV6_LONGTEXT, VLC_TRUE );
115 add_string( "sap-ipv6-scope", "8" , NULL,
116 SAP_SCOPE_TEXT, SAP_SCOPE_LONGTEXT, VLC_TRUE);
117 add_integer( "sap-timeout", 1800, NULL,
118 SAP_TIMEOUT_TEXT, SAP_TIMEOUT_LONGTEXT, VLC_TRUE );
119 add_bool( "sap-parse", 1 , NULL,
120 SAP_PARSE_TEXT,SAP_PARSE_LONGTEXT, VLC_TRUE );
121 add_bool( "sap-strict", 0 , NULL,
122 SAP_STRICT_TEXT,SAP_STRICT_LONGTEXT, VLC_TRUE );
123 add_bool( "sap-cache", 0 , NULL,
124 SAP_CACHE_TEXT,SAP_CACHE_LONGTEXT, VLC_TRUE );
126 set_capability( "services_discovery", 0 );
127 set_callbacks( Open, Close );
130 set_description( _("SDP file parser for UDP") );
131 add_shortcut( "sdp" );
132 set_capability( "demux2", 51 );
133 set_callbacks( OpenDemux, CloseDemux );
137 /*****************************************************************************
139 *****************************************************************************/
141 typedef struct sdp_t sdp_t;
142 typedef struct attribute_t attribute_t;
143 typedef struct sap_announce_t sap_announce_t;
145 /* The structure that contains sdp information */
151 char *psz_sessionname;
153 /* Raw m= and c= fields */
154 char *psz_connection;
159 char *psz_network_type;
160 char *psz_address_type;
162 int64_t i_session_id;
167 int i_in; /* IP version */
173 attribute_t **pp_attributes;
182 struct sap_announce_t
187 uint32_t i_source[4];
189 /* SAP annnounces must only contain one SDP */
192 playlist_item_t *p_item;
195 struct services_discovery_sys_t
197 /* Socket descriptors */
202 playlist_item_t *p_node;
204 /* Table of announces */
206 struct sap_announce_t **pp_announces;
220 /*****************************************************************************
222 *****************************************************************************/
226 static int Demux( demux_t *p_demux );
227 static int Control( demux_t *, int, va_list );
228 static void Run ( services_discovery_t *p_sd );
230 /* Main parsing functions */
231 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp );
232 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read );
233 static sdp_t * ParseSDP( vlc_object_t *p_sd, char* psz_sdp );
234 static sap_announce_t *CreateAnnounce( services_discovery_t *, uint16_t, sdp_t * );
235 static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
238 static void CacheLoad( services_discovery_t *p_sd );
239 static void CacheSave( services_discovery_t *p_sd );
240 /* Helper functions */
241 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
242 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
243 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port );
245 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len );
246 static void FreeSDP( sdp_t *p_sdp );
249 /* Detect multicast addresses */
250 static int ismult( char * );
253 if( p ) { free( p ); (p) = NULL; }
254 /*****************************************************************************
255 * Open: initialize and create stuff
256 *****************************************************************************/
257 static int Open( vlc_object_t *p_this )
259 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
260 services_discovery_sys_t *p_sys = (services_discovery_sys_t *)
261 malloc( sizeof( services_discovery_sys_t ) );
263 playlist_t *p_playlist;
264 playlist_view_t *p_view;
268 p_sys->i_timeout = config_GetInt( p_sd,"sap-timeout" );
276 p_sys->b_strict = config_GetInt( p_sd, "sap-strict");
277 p_sys->b_parse = config_GetInt( p_sd, "sap-parse" );
279 if( config_GetInt( p_sd, "sap-cache" ) )
284 if( config_GetInt( p_sd, "sap-ipv4" ) )
286 InitSocket( p_sd, SAP_V4_ADDRESS, SAP_PORT );
288 if( config_GetInt( p_sd, "sap-ipv6" ) )
290 /* [ + 8x4+7*':' + ] */
291 char psz_address[42];
293 char *psz_scope = config_GetPsz( p_sd, "sap-ipv6-scope" );
295 if( psz_scope == NULL || *psz_scope == '\0')
301 c_scope = psz_scope[0];
303 snprintf( psz_address, 42, "[%s%c%s]", IPV6_ADDR_1, c_scope,
305 InitSocket( p_sd, psz_address, SAP_PORT );
308 psz_addr = config_GetPsz( p_sd, "sap-addr" );
309 if( psz_addr && *psz_addr )
311 InitSocket( p_sd, psz_addr, SAP_PORT );
314 if( p_sys->i_fd == 0 )
316 msg_Err( p_sd, "unable to read on any address");
320 /* Create our playlist node */
321 p_playlist = (playlist_t *)vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
325 msg_Warn( p_sd, "unable to find playlist, cancelling SAP listening");
329 p_view = playlist_ViewFind( p_playlist, VIEW_CATEGORY );
330 p_sys->p_node = playlist_NodeCreate( p_playlist, VIEW_CATEGORY,
331 _("SAP"), p_view->p_root );
332 val.b_bool = VLC_TRUE;
333 var_Set( p_playlist, "intf-change", val );
335 vlc_object_release( p_playlist );
337 p_sys->i_announces = 0;
338 p_sys->pp_announces = NULL;
343 /*****************************************************************************
344 * OpenDemux: initialize and create stuff
345 *****************************************************************************/
346 static int OpenDemux( vlc_object_t *p_this )
348 demux_t *p_demux = (demux_t *)p_this;
350 int i_max_sdp = 1024;
352 char *psz_sdp = (char *)malloc( i_max_sdp );
364 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 )
366 msg_Err( p_demux, "cannot peek" );
369 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
370 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
371 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
373 msg_Warn( p_demux, "SDP (UDP) module discarded" );
378 /* Gather the complete sdp file */
381 int i_read = stream_Read( p_demux->s,
382 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
387 msg_Err( p_demux, "failed to read SDP" );
393 if( i_read < i_max_sdp - i_sdp - 1 )
395 psz_sdp[i_sdp] = '\0';
400 psz_sdp = (uint8_t*)realloc( psz_sdp, i_max_sdp );
403 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
407 msg_Warn( p_demux, "invalid SDP");
411 if( p_sdp->i_media > 1 )
416 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
418 p_sdp->psz_uri = NULL;
420 if( p_sdp->i_media_type != 33 && p_sdp->i_media_type != 32 && p_sdp->i_media_type != 14 )
423 if( p_sdp->psz_uri == NULL ) goto error;
425 p_demux->p_sys = (demux_sys_t *)malloc( sizeof(demux_sys_t) );
426 p_demux->p_sys->p_sdp = p_sdp;
427 p_demux->pf_control = Control;
428 p_demux->pf_demux = Demux;
431 if( p_sdp ) FreeSDP( p_sdp );
436 if( p_sdp ) FreeSDP( p_sdp );
437 stream_Seek( p_demux->s, 0 );
441 /*****************************************************************************
443 *****************************************************************************/
444 static void Close( vlc_object_t *p_this )
446 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
447 services_discovery_sys_t *p_sys = p_sd->p_sys;
449 playlist_t *p_playlist;
452 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
454 net_Close( p_sys->pi_fd[i] );
457 if( config_GetInt( p_sd, "sap-cache" ) )
462 for( i = p_sys->i_announces - 1; i>= 0; i-- )
464 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
467 p_playlist = (playlist_t *) vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
472 playlist_NodeDelete( p_playlist, p_sys->p_node, VLC_TRUE );
473 vlc_object_release( p_playlist );
479 /*****************************************************************************
480 * CloseDemux: Close the demuxer
481 *****************************************************************************/
482 static void CloseDemux( vlc_object_t *p_this )
487 /*****************************************************************************
488 * Run: main SAP thread
489 *****************************************************************************
490 * Listens to SAP packets, and sends them to packet_handle
491 *****************************************************************************/
492 #define MAX_SAP_BUFFER 5000
494 static void Run( services_discovery_t *p_sd )
497 /* Dirty hack to slow down the startup of the sap interface */
498 /* Unneeded now : our node is in no_select mode */
501 /* read SAP packets */
502 while( !p_sd->b_die )
505 p_buffer = (uint8_t *)malloc( MAX_SAP_BUFFER );
509 msg_Err( p_sd, "out of memory");
510 p_sd->b_die = VLC_TRUE;
514 i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
515 p_sd->p_sys->i_fd, p_buffer,
516 MAX_SAP_BUFFER, 500000 );
518 /* Check for items that need deletion */
519 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
521 struct sap_announce_t *p_announce;
522 mtime_t i_timeout = ( mtime_t ) 1000000*p_sys->i_timeout;
523 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
525 msg_Dbg( p_sd,"Time out for %s, deleting (%i/%i)",
526 p_sd->p_sys->pp_announces[i]->psz_name,
527 i , p_sd->p_sys->i_announces );
529 /* Remove the playlist item */
530 p_playlist = vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
534 int i_pos = playlist_GetPositionById( p_playlist,
535 p_sd->p_sys->pp_announces[i]->i_id );
536 playlist_Delete( p_playlist, i_pos );
537 vlc_object_release( p_playlist );
540 /* Free the p_announce */
541 p_announce = p_sd->p_sys->pp_announces[i];
542 if( p_announce->psz_name )
543 free( p_announce->psz_name );
544 if( p_announce->psz_uri )
545 free( p_announce->psz_uri );
547 /* Remove the sap_announce from the array */
548 REMOVE_ELEM( p_sd->p_sys->pp_announces,
549 p_sd->p_sys->i_announces, i );
557 /* Minimum length is > 6 */
562 msg_Warn( p_sd, "socket read error" );
568 p_buffer[i_read] = '\0';
570 /* Parse the packet */
571 ParseSAP( p_sd, p_buffer, i_read );
577 /**********************************************************************
578 * Demux: reads and demuxes data packets
579 * Return -1 if error, 0 if EOF, 1 else
580 **********************************************************************/
581 static int Demux( demux_t *p_demux )
583 sdp_t *p_sdp = p_demux->p_sys->p_sdp;
584 playlist_t *p_playlist;
586 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
589 p_playlist->status.p_item->i_flags |= PLAYLIST_DEL_FLAG;
591 playlist_Add( p_playlist, p_sdp->psz_uri, p_sdp->psz_sessionname,
592 PLAYLIST_APPEND, PLAYLIST_END );
594 vlc_object_release( p_playlist );
599 static int Control( demux_t *p_demux, int i_query, va_list args )
604 /**************************************************************
606 **************************************************************/
608 /* i_read is at least > 6 */
609 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
611 int i_version, i_address_type, i_hash, i;
613 uint8_t *psz_initial_sdp;
615 vlc_bool_t b_compressed;
616 vlc_bool_t b_need_delete = VLC_FALSE;
618 int i_decompressed_size;
619 uint8_t *p_decompressed_buffer;
623 /* First, check the sap announce is correct */
624 i_version = p_buffer[0] >> 5;
628 msg_Dbg( p_sd, "strange sap version %d found", i_version );
631 i_address_type = p_buffer[0] & 0x10;
633 if( (p_buffer[0] & 0x08) != 0 )
635 msg_Dbg( p_sd, "reserved bit incorrectly set" );
639 if( (p_buffer[0] & 0x04) != 0 )
641 msg_Dbg( p_sd, "session deletion packet" );
642 b_need_delete = VLC_TRUE;
645 if( p_buffer[0] & 0x02 )
647 msg_Dbg( p_sd, "encrypted packet, unsupported" );
651 b_compressed = p_buffer[0] & 0x01;
653 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
655 if( p_sd->p_sys->b_strict && i_hash == 0 )
657 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
661 psz_sdp = &p_buffer[4];
662 psz_initial_sdp = psz_sdp;
664 if( i_address_type == 0 ) /* ipv4 source address */
669 msg_Warn( p_sd,"too short SAP packet\n" );
673 else /* ipv6 source address */
678 msg_Warn( p_sd,"too short SAP packet\n" );
686 i_decompressed_size = Decompress( psz_sdp,
687 &p_decompressed_buffer,i_read - ( psz_sdp - p_buffer ) );
688 if( i_decompressed_size > 0 && i_decompressed_size < MAX_SAP_BUFFER )
690 memcpy( psz_sdp, p_decompressed_buffer, i_decompressed_size );
691 psz_sdp[i_decompressed_size] = '\0';
692 free( p_decompressed_buffer );
695 msg_Warn( p_sd, "Ignoring compressed sap packet" );
700 /* Add the size of authentification info */
701 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
703 msg_Warn( p_sd, "too short SAP packet\n");
706 psz_sdp += p_buffer[1];
709 /* Skip payload type */
710 /* Handle announces without \0 between SAP and SDP */
711 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
713 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
715 msg_Warn( p_sd, "empty SDP ?");
720 if( *psz_sdp == '\0' )
724 if( psz_sdp != psz_foo && strcasecmp( psz_foo, "application/sdp" ) )
726 msg_Dbg( p_sd, "unhandled content type: %s", psz_foo );
728 if( psz_sdp -p_buffer >= i_read )
730 msg_Warn( p_sd, "package without content" );
735 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
742 /* Decide whether we should add a playlist item for this SDP */
743 /* Parse connection information (c= & m= ) */
744 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
746 p_sdp->psz_uri = NULL;
749 /* Multi-media or no-parse -> pass to LIVE.COM */
750 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
751 p_sdp->i_media_type != 32 &&
752 p_sdp->i_media_type != 33) ||
753 p_sd->p_sys->b_parse == VLC_FALSE )
755 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
756 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
759 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
761 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
764 /* FIXME: we create a new announce each time the sdp changes */
765 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
769 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
774 p_sd->p_sys->pp_announces[i]->i_last = mdate();
781 if( p_sdp->i_media > 1 )
783 msg_Dbg( p_sd, "passing to LIVE.COM" );
786 CreateAnnounce( p_sd, i_hash, p_sdp );
791 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
794 playlist_t *p_playlist;
795 playlist_item_t *p_item, *p_child;
797 sap_announce_t *p_sap = (sap_announce_t *)malloc(
798 sizeof(sap_announce_t ) );
801 msg_Err( p_sd, "out of memory");
802 p_sd->b_die = VLC_TRUE;
805 p_sap->i_last = mdate();
806 p_sap->i_hash = i_hash;
807 p_sap->p_sdp = p_sdp;
808 p_sap->p_item = NULL;
810 /* Create the playlist item here */
811 p_item = playlist_ItemNew( p_sd, p_sap->p_sdp->psz_uri,
812 p_sap->p_sdp->psz_sessionname );
819 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
821 if( psz_value == NULL )
823 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
826 p_playlist = (playlist_t *)vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
830 msg_Err( p_sd, "playlist not found" );
836 if( psz_value != NULL )
838 p_child = playlist_ChildSearchName( p_sd->p_sys->p_node, psz_value );
840 if( p_child == NULL )
842 p_child = playlist_NodeCreate( p_playlist, VIEW_CATEGORY,
843 psz_value, p_sd->p_sys->p_node );
848 p_child = p_sd->p_sys->p_node;
851 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
853 playlist_NodeAddItem( p_playlist, p_item, VIEW_CATEGORY, p_child,
854 PLAYLIST_APPEND, PLAYLIST_END );
856 vlc_object_release( p_playlist );
858 p_sap->p_item = p_item;
860 TAB_APPEND( p_sd->p_sys->i_announces,
861 p_sd->p_sys->pp_announces, p_sap );
866 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
870 for( i = 0 ; i< p_sdp->i_attributes; i++ )
872 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
873 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
875 return p_sdp->pp_attributes[i]->psz_value;
882 /* Fill p_sdp->psz_uri */
883 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
887 char *psz_uri = NULL;
888 char *psz_proto = NULL;
892 if( p_sdp->psz_connection )
894 psz_parse = p_sdp->psz_connection;
896 psz_eof = strchr( psz_parse, ' ' );
901 psz_parse = psz_eof + 1;
905 msg_Warn( p_obj, "unable to parse c field (1)");
909 psz_eof = strchr( psz_parse, ' ' );
914 if( !strncmp( psz_parse, "IP4", 3 ) )
918 else if( !strncmp( psz_parse, "IP6", 3 ) )
926 psz_parse = psz_eof + 1;
930 msg_Warn( p_obj, "unable to parse c field (2)");
934 psz_eof = strchr( psz_parse, '/' );
942 msg_Dbg( p_obj, "incorrect c field");
944 psz_uri = strdup( psz_parse );
949 if( p_sdp->psz_media )
951 psz_parse = p_sdp->psz_media;
953 psz_eof = strchr( psz_parse, ' ' );
959 if( strncmp( psz_parse, "audio", 5 ) &&
960 strncmp( psz_parse, "video",5 ) )
962 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
967 psz_parse = psz_eof + 1;
971 msg_Warn( p_obj, "unable to parse m field (1)");
976 psz_eof = strchr( psz_parse, ' ' );
982 /* FIXME : multiple port ! */
983 i_port = atoi( psz_parse );
985 if( i_port <= 0 || i_port >= 65536 )
987 msg_Warn( p_obj, "invalid transport port %i", i_port );
990 psz_parse = psz_eof + 1;
994 msg_Warn( p_obj, "unable to parse m field (2)");
999 psz_eof = strchr( psz_parse, ' ' );
1004 psz_proto = strdup( psz_parse );
1006 psz_parse = psz_eof + 1;
1007 p_sdp->i_media_type = atoi( psz_parse );
1012 msg_Dbg( p_obj, "incorrect m field");
1013 p_sdp->i_media_type = 33;
1014 psz_proto = strdup( psz_parse );
1018 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
1021 psz_proto = strdup( "rtp" );
1023 if( psz_proto && !strncmp( psz_proto, "UDP", 3 ) )
1026 psz_proto = strdup( "udp" );
1030 /* FIXME: HTTP support */
1037 if( ismult( psz_uri ) )
1039 asprintf( &p_sdp->psz_uri, "%s://@%s:%i", psz_proto, psz_uri, i_port );
1043 asprintf( &p_sdp->psz_uri, "%s://%s:%i", psz_proto, psz_uri, i_port );
1050 /***********************************************************************
1051 * ParseSDP : SDP parsing
1052 * *********************************************************************
1053 * Validate SDP and parse all fields
1054 ***********************************************************************/
1055 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1058 vlc_bool_t b_invalid = VLC_FALSE;
1059 vlc_bool_t b_end = VLC_FALSE;
1061 if( psz_sdp == NULL )
1066 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1068 msg_Warn( p_obj, "Bad packet" );
1072 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1074 p_sdp->psz_sdp = strdup( psz_sdp );
1076 p_sdp->psz_sessionname = NULL;
1077 p_sdp->psz_media = NULL;
1078 p_sdp->psz_connection = NULL;
1079 p_sdp->psz_uri = NULL;
1080 p_sdp->psz_address = NULL;
1081 p_sdp->psz_address_type= NULL;
1084 p_sdp->i_attributes = 0;
1085 p_sdp->pp_attributes = NULL;
1087 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1094 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1095 *psz_sdp == ' ' || *psz_sdp == '\t' )
1100 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1102 psz_eol = psz_sdp + strlen( psz_sdp );
1105 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1110 if( psz_eol <= psz_sdp )
1116 /* no space allowed between fields */
1117 if( psz_sdp[1] != '=' )
1119 msg_Warn( p_obj, "invalid packet" ) ;
1124 /* Now parse each line */
1125 switch( psz_sdp[0] )
1130 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1135 /* o field is <username> <session id> <version>
1136 * <network type> <address type> <address> */
1138 #define GET_FIELD( store ) \
1139 psz_eof = strchr( psz_parse, ' ' ); \
1142 *psz_eof=0; store = strdup( psz_parse ); \
1146 if( i_field != 5 ) \
1148 b_invalid = VLC_TRUE; break; \
1152 store = strdup( psz_parse ); \
1155 psz_parse = psz_eof + 1; i_field++;
1158 psz_parse = &psz_sdp[2];
1159 GET_FIELD( p_sdp->psz_username );
1160 GET_FIELD( psz_sess_id );
1162 p_sdp->i_session_id = atoll( psz_sess_id );
1164 FREE( psz_sess_id );
1166 GET_FIELD( psz_sess_id );
1167 FREE( psz_sess_id );
1169 GET_FIELD( p_sdp->psz_network_type );
1170 GET_FIELD( p_sdp->psz_address_type );
1171 GET_FIELD( p_sdp->psz_address );
1182 case( 'a' ): /* attribute */
1184 char *psz_eon = strchr( &psz_sdp[2], ':' );
1185 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1187 /* Attribute with value */
1192 p_attr->psz_field = strdup( &psz_sdp[2] );
1193 p_attr->psz_value = strdup( psz_eon );
1195 else /* Attribute without value */
1197 p_attr->psz_field = strdup( &psz_sdp[2] );
1198 p_attr->psz_value = NULL;
1201 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1205 case( 'm' ): /* Media announcement */
1207 /* If we have several medias, we pass the announcement to
1208 * LIVE.COM, so just count them */
1210 if( p_sdp->i_media == 1 )
1212 p_sdp->psz_media = strdup( &psz_sdp[2] );
1219 if( p_sdp->i_media > 1 )
1222 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1243 /***********************************************************************
1244 * ismult: returns true if we have a multicast address
1245 ***********************************************************************/
1246 static int ismult( char *psz_uri )
1251 i_value = strtol( psz_uri, &psz_end, 0 );
1254 if( psz_uri[0] == '[')
1256 if( strncasecmp( &psz_uri[1], "FF0" , 3) ||
1257 strncasecmp( &psz_uri[2], "FF0" , 3))
1260 return( VLC_FALSE );
1263 if( *psz_end != '.' ) { return( VLC_FALSE ); }
1265 return( i_value < 224 ? VLC_FALSE : VLC_TRUE );
1268 static int InitSocket( services_discovery_t *p_sd, char *psz_address,
1271 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, "", 0 );
1275 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1276 p_sd->p_sys->i_fd, i_fd );
1280 return VLC_EGENERIC;
1284 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1286 int i_result, i_dstsize, n;
1287 unsigned char *psz_dst;
1290 d_stream.zalloc = (alloc_func)0;
1291 d_stream.zfree = (free_func)0;
1292 d_stream.opaque = (voidpf)0;
1294 i_result = inflateInit(&d_stream);
1295 if( i_result != Z_OK )
1297 printf( "inflateInit() failed. Result: %d\n", i_result );
1301 p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
1302 i_position = p_playlist->i_index;
1304 /* Gather the complete sdp file */
1307 int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp], i_sdp_max - i_sdp - 1 );
1309 d_stream.next_in = (Bytef *)psz_src;
1310 d_stream.avail_in = i_len;
1318 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1319 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1320 d_stream.avail_out = 1000;
1322 i_result = inflate(&d_stream, Z_NO_FLUSH);
1323 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1325 printf( "Zlib decompression failed. Result: %d\n", i_result );
1329 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1330 ( i_result != Z_STREAM_END ) );
1332 i_dstsize = d_stream.total_out;
1333 inflateEnd( &d_stream );
1335 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1342 static void FreeSDP( sdp_t *p_sdp )
1345 FREE( p_sdp->psz_sdp );
1346 FREE( p_sdp->psz_sessionname );
1347 FREE( p_sdp->psz_connection );
1348 FREE( p_sdp->psz_media );
1349 FREE( p_sdp->psz_uri );
1351 FREE( p_sdp->psz_address );
1352 FREE( p_sdp->psz_address_type );
1354 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1356 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1357 FREE( p_sdp->pp_attributes[i]->psz_field );
1358 FREE( p_sdp->pp_attributes[i]->psz_value );
1359 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1365 static int RemoveAnnounce( services_discovery_t *p_sd,
1366 sap_announce_t *p_announce )
1369 playlist_t *p_playlist = (playlist_t *)vlc_object_find( p_sd,
1370 VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
1372 if( p_announce->p_sdp ) FreeSDP( p_announce->p_sdp );
1374 if( !p_playlist ) return VLC_EGENERIC;
1376 if( p_announce->p_item )
1378 playlist_Delete( p_playlist, p_announce->p_item->input.i_id );
1381 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1383 if( p_sd->p_sys->pp_announces[i] == p_announce )
1385 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1391 vlc_object_release( p_playlist );
1398 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1400 /* A session is identified by
1401 * username, session_id, network type, address type and address */
1402 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1403 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1404 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1405 p_sdp1->psz_address && p_sdp2->psz_address )
1407 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1408 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1409 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1410 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1411 p_sdp1->i_session_id == p_sdp2->i_session_id )
1427 static void CacheLoad( services_discovery_t *p_sd )
1429 msg_Warn( p_sd, "Cache not implemented") ;
1432 static void CacheSave( services_discovery_t *p_sd )
1434 msg_Warn( p_sd, "Cache not implemented") ;