1 /*****************************************************************************
2 * sap.c : SAP interface module
3 *****************************************************************************
4 * Copyright (C) 2004-2005 the VideoLAN team
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() */
30 #include <vlc/input.h>
42 #ifdef HAVE_SYS_TIME_H
43 # include <sys/time.h>
50 /************************************************************************
51 * Macros and definitions
52 ************************************************************************/
54 #define MAX_LINE_LENGTH 256
56 /* SAP is always on that port */
58 /* Global-scope SAP address */
59 #define SAP_V4_GLOBAL_ADDRESS "224.2.127.254"
60 /* Organization-local SAP address */
61 #define SAP_V4_ORG_ADDRESS "239.195.255.255"
62 /* Local (smallest non-link-local scope) SAP address */
63 #define SAP_V4_LOCAL_ADDRESS "239.255.255.255"
64 /* Link-local SAP address */
65 #define SAP_V4_LINK_ADDRESS "224.0.0.255"
68 #define SAP_V6_1 "FF0"
69 /* Scope is inserted between them */
70 #define SAP_V6_2 "::2:7FFE"
71 /* See RFC3513 for list of valid scopes */
72 /* FIXME: find a way to listen to link-local scope */
73 static const char ipv6_scopes[] = "1456789ABCDE";
76 /*****************************************************************************
78 *****************************************************************************/
79 #define SAP_ADDR_TEXT N_( "SAP multicast address" )
80 #define SAP_ADDR_LONGTEXT N_( "Listen for SAP announces on another address" )
81 #define SAP_IPV4_TEXT N_( "IPv4-SAP listening" )
82 #define SAP_IPV4_LONGTEXT N_( \
83 "Set this if you want the SAP module to listen to IPv4 announces " \
84 "on the standard address." )
85 #define SAP_IPV6_TEXT N_( "IPv6-SAP listening" )
86 #define SAP_IPV6_LONGTEXT N_( \
87 "Set this if you want the SAP module to listen to IPv6 announces " \
88 "on the standard address." )
89 #define SAP_SCOPE_TEXT N_( "IPv6 SAP scope" )
90 #define SAP_SCOPE_LONGTEXT N_( \
91 "Sets the scope for IPv6 announces (default is 8)." )
92 #define SAP_TIMEOUT_TEXT N_( "SAP timeout (seconds)" )
93 #define SAP_TIMEOUT_LONGTEXT N_( \
94 "Sets the time before SAP items get deleted if no new announce " \
96 #define SAP_PARSE_TEXT N_( "Try to parse the SAP" )
97 #define SAP_PARSE_LONGTEXT N_( \
98 "When SAP can it will try to parse the SAP. If you don't select " \
99 "this, all announces will be parsed by the livedotcom module." )
100 #define SAP_STRICT_TEXT N_( "SAP Strict mode" )
101 #define SAP_STRICT_LONGTEXT N_( \
102 "When this is set, the SAP parser will discard some non-compliant " \
104 #define SAP_CACHE_TEXT N_("Use SAP cache")
105 #define SAP_CACHE_LONGTEXT N_( \
106 "If this option is selected, a SAP caching mechanism will be used. " \
107 "This will result in lower SAP startup time, but you could end up " \
108 "with items corresponding to legacy streams." )
111 static int Open ( vlc_object_t * );
112 static void Close( vlc_object_t * );
113 static int OpenDemux ( vlc_object_t * );
114 static void CloseDemux ( vlc_object_t * );
117 set_shortname( _("SAP"));
118 set_description( _("SAP announces") );
119 set_category( CAT_PLAYLIST );
120 set_subcategory( SUBCAT_PLAYLIST_SD );
122 add_string( "sap-addr", NULL, NULL,
123 SAP_ADDR_TEXT, SAP_ADDR_LONGTEXT, VLC_TRUE );
124 add_bool( "sap-ipv4", 1 , NULL,
125 SAP_IPV4_TEXT,SAP_IPV4_LONGTEXT, VLC_TRUE );
126 add_bool( "sap-ipv6", 1 , NULL,
127 SAP_IPV6_TEXT, SAP_IPV6_LONGTEXT, VLC_TRUE );
128 add_integer( "sap-timeout", 1800, NULL,
129 SAP_TIMEOUT_TEXT, SAP_TIMEOUT_LONGTEXT, VLC_TRUE );
130 add_bool( "sap-parse", 1 , NULL,
131 SAP_PARSE_TEXT,SAP_PARSE_LONGTEXT, VLC_TRUE );
132 add_bool( "sap-strict", 0 , NULL,
133 SAP_STRICT_TEXT,SAP_STRICT_LONGTEXT, VLC_TRUE );
134 add_bool( "sap-cache", 0 , NULL,
135 SAP_CACHE_TEXT,SAP_CACHE_LONGTEXT, VLC_TRUE );
137 set_capability( "services_discovery", 0 );
138 set_callbacks( Open, Close );
141 set_description( _("SDP file parser for UDP") );
142 add_shortcut( "sdp" );
143 set_capability( "demux2", 51 );
144 set_callbacks( OpenDemux, CloseDemux );
148 /*****************************************************************************
150 *****************************************************************************/
152 typedef struct sdp_t sdp_t;
153 typedef struct attribute_t attribute_t;
154 typedef struct sap_announce_t sap_announce_t;
156 /* The structure that contains sdp information */
162 char *psz_sessionname;
164 /* Raw m= and c= fields */
165 char *psz_connection;
170 char *psz_network_type;
171 char *psz_address_type;
173 int64_t i_session_id;
178 int i_in; /* IP version */
184 attribute_t **pp_attributes;
193 struct sap_announce_t
198 uint32_t i_source[4];
200 /* SAP annnounces must only contain one SDP */
204 // playlist_item_t *p_item;
207 struct services_discovery_sys_t
209 /* Socket descriptors */
214 playlist_item_t *p_node;
215 playlist_t *p_playlist;
217 /* Table of announces */
219 struct sap_announce_t **pp_announces;
233 /*****************************************************************************
235 *****************************************************************************/
239 static int Demux( demux_t *p_demux );
240 static int Control( demux_t *, int, va_list );
241 static void Run ( services_discovery_t *p_sd );
243 /* Main parsing functions */
244 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp );
245 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read );
246 static sdp_t * ParseSDP( vlc_object_t *p_sd, char* psz_sdp );
247 static sap_announce_t *CreateAnnounce( services_discovery_t *, uint16_t, sdp_t * );
248 static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
251 static void CacheLoad( services_discovery_t *p_sd );
252 static void CacheSave( services_discovery_t *p_sd );
253 /* Helper functions */
254 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
255 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
256 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port );
258 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len );
260 static void FreeSDP( sdp_t *p_sdp );
264 if( p ) { free( p ); (p) = NULL; }
265 /*****************************************************************************
266 * Open: initialize and create stuff
267 *****************************************************************************/
268 static int Open( vlc_object_t *p_this )
270 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
271 services_discovery_sys_t *p_sys = (services_discovery_sys_t *)
272 malloc( sizeof( services_discovery_sys_t ) );
274 playlist_view_t *p_view;
278 p_sys->i_timeout = var_CreateGetInteger( p_sd, "sap-timeout" );
286 p_sys->b_strict = var_CreateGetInteger( p_sd, "sap-strict");
287 p_sys->b_parse = var_CreateGetInteger( p_sd, "sap-parse" );
289 if( var_CreateGetInteger( p_sd, "sap-cache" ) )
294 if( var_CreateGetInteger( p_sd, "sap-ipv4" ) )
296 InitSocket( p_sd, SAP_V4_GLOBAL_ADDRESS, SAP_PORT );
297 InitSocket( p_sd, SAP_V4_ORG_ADDRESS, SAP_PORT );
298 InitSocket( p_sd, SAP_V4_LOCAL_ADDRESS, SAP_PORT );
299 InitSocket( p_sd, SAP_V4_LINK_ADDRESS, SAP_PORT );
301 if( var_CreateGetInteger( p_sd, "sap-ipv6" ) )
303 char psz_address[] = SAP_V6_1"0"SAP_V6_2;
306 for( c_scope = ipv6_scopes; *c_scope; c_scope++ )
308 psz_address[sizeof(SAP_V6_1) - 1] = *c_scope;
309 InitSocket( p_sd, psz_address, SAP_PORT );
313 psz_addr = var_CreateGetString( p_sd, "sap-addr" );
314 if( psz_addr && *psz_addr )
316 InitSocket( p_sd, psz_addr, SAP_PORT );
319 if( p_sys->i_fd == 0 )
321 msg_Err( p_sd, "unable to read on any address" );
325 /* Create our playlist node */
326 p_sys->p_playlist = (playlist_t *)vlc_object_find( p_sd,
329 if( !p_sys->p_playlist )
331 msg_Warn( p_sd, "unable to find playlist, cancelling SAP listening");
335 p_view = playlist_ViewFind( p_sys->p_playlist, VIEW_CATEGORY );
336 p_sys->p_node = playlist_NodeCreate( p_sys->p_playlist, VIEW_CATEGORY,
337 _("SAP"), p_view->p_root );
338 p_sys->p_node->i_flags |= PLAYLIST_RO_FLAG;
339 p_sys->p_node->i_flags &= ~PLAYLIST_SKIP_FLAG;
340 val.b_bool = VLC_TRUE;
341 var_Set( p_sys->p_playlist, "intf-change", val );
343 p_sys->i_announces = 0;
344 p_sys->pp_announces = NULL;
349 /*****************************************************************************
350 * OpenDemux: initialize and create stuff
351 *****************************************************************************/
352 static int OpenDemux( vlc_object_t *p_this )
354 demux_t *p_demux = (demux_t *)p_this;
356 int i_max_sdp = 1024;
358 char *psz_sdp = NULL;
361 if( !var_CreateGetInteger( p_demux, "sap-parse" ) )
363 /* We want livedotcom module to parse this SDP file */
370 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
372 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
373 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
374 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
380 psz_sdp = (char *)malloc( i_max_sdp );
381 if( !psz_sdp ) return VLC_EGENERIC;
383 /* Gather the complete sdp file */
386 int i_read = stream_Read( p_demux->s,
387 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
391 msg_Err( p_demux, "failed to read SDP" );
397 if( i_read < i_max_sdp - i_sdp - 1 )
399 psz_sdp[i_sdp] = '\0';
404 psz_sdp = (char *)realloc( psz_sdp, i_max_sdp );
407 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
411 msg_Warn( p_demux, "invalid SDP");
415 if( p_sdp->i_media > 1 )
420 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
422 p_sdp->psz_uri = NULL;
424 if( p_sdp->i_media_type != 33 && p_sdp->i_media_type != 32 &&
425 p_sdp->i_media_type != 14 )
428 if( p_sdp->psz_uri == NULL ) goto error;
430 p_demux->p_sys = (demux_sys_t *)malloc( sizeof(demux_sys_t) );
431 p_demux->p_sys->p_sdp = p_sdp;
432 p_demux->pf_control = Control;
433 p_demux->pf_demux = Demux;
440 if( p_sdp ) FreeSDP( p_sdp );
441 stream_Seek( p_demux->s, 0 );
445 /*****************************************************************************
447 *****************************************************************************/
448 static void Close( vlc_object_t *p_this )
450 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
451 services_discovery_sys_t *p_sys = p_sd->p_sys;
455 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
457 net_Close( p_sys->pi_fd[i] );
459 FREE( p_sys->pi_fd );
461 if( config_GetInt( p_sd, "sap-cache" ) )
466 for( i = p_sys->i_announces - 1; i>= 0; i-- )
468 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
470 FREE( p_sys->pp_announces );
472 if( p_sys->p_playlist )
474 playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node, VLC_TRUE,
476 vlc_object_release( p_sys->p_playlist );
482 /*****************************************************************************
483 * CloseDemux: Close the demuxer
484 *****************************************************************************/
485 static void CloseDemux( vlc_object_t *p_this )
490 /*****************************************************************************
491 * Run: main SAP thread
492 *****************************************************************************
493 * Listens to SAP packets, and sends them to packet_handle
494 *****************************************************************************/
495 #define MAX_SAP_BUFFER 5000
497 static void Run( services_discovery_t *p_sd )
501 /* read SAP packets */
502 while( !p_sd->b_die )
505 uint8_t p_buffer[MAX_SAP_BUFFER+1];
507 i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
508 p_sd->p_sys->i_fd, p_buffer,
509 MAX_SAP_BUFFER, 500000 );
511 /* Check for items that need deletion */
512 for( i = 0; i < p_sd->p_sys->i_announces; i++ )
514 mtime_t i_timeout = ( mtime_t ) 1000000 * p_sd->p_sys->i_timeout;
516 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
518 struct sap_announce_t *p_announce;
519 p_announce = p_sd->p_sys->pp_announces[i];
521 /* Remove the playlist item */
522 playlist_LockDelete( p_sd->p_sys->p_playlist,
523 p_announce->i_item_id );
525 /* Remove the sap_announce from the array */
526 REMOVE_ELEM( p_sd->p_sys->pp_announces,
527 p_sd->p_sys->i_announces, i );
533 /* Minimum length is > 6 */
538 msg_Warn( p_sd, "socket read error" );
543 p_buffer[i_read] = '\0';
545 /* Parse the packet */
546 ParseSAP( p_sd, p_buffer, i_read );
550 /**********************************************************************
551 * Demux: reads and demuxes data packets
552 * Return -1 if error, 0 if EOF, 1 else
553 **********************************************************************/
554 static int Demux( demux_t *p_demux )
556 sdp_t *p_sdp = p_demux->p_sys->p_sdp;
557 playlist_t *p_playlist;
559 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
562 p_playlist->status.p_item->i_flags |= PLAYLIST_DEL_FLAG;
564 playlist_Add( p_playlist, p_sdp->psz_uri, p_sdp->psz_sessionname,
565 PLAYLIST_APPEND, PLAYLIST_END );
567 vlc_object_release( p_playlist );
568 if( p_sdp ) FreeSDP( p_sdp );
573 static int Control( demux_t *p_demux, int i_query, va_list args )
578 /**************************************************************
580 **************************************************************/
582 /* i_read is at least > 6 */
583 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
585 int i_version, i_address_type, i_hash, i;
586 char *psz_sdp, *psz_foo, *psz_initial_sdp;
588 vlc_bool_t b_compressed;
589 vlc_bool_t b_need_delete = VLC_FALSE;
591 /* First, check the sap announce is correct */
592 i_version = p_buffer[0] >> 5;
595 msg_Dbg( p_sd, "strange sap version %d found", i_version );
598 i_address_type = p_buffer[0] & 0x10;
600 if( (p_buffer[0] & 0x08) != 0 )
602 msg_Dbg( p_sd, "reserved bit incorrectly set" );
606 if( (p_buffer[0] & 0x04) != 0 )
608 msg_Dbg( p_sd, "session deletion packet" );
609 b_need_delete = VLC_TRUE;
612 if( p_buffer[0] & 0x02 )
614 msg_Dbg( p_sd, "encrypted packet, unsupported" );
618 b_compressed = p_buffer[0] & 0x01;
620 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
622 if( p_sd->p_sys->b_strict && i_hash == 0 )
624 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
628 psz_sdp = (char *)p_buffer + 4;
629 psz_initial_sdp = psz_sdp;
631 if( i_address_type == 0 ) /* ipv4 source address */
636 msg_Warn( p_sd, "too short SAP packet\n" );
640 else /* ipv6 source address */
645 msg_Warn( p_sd, "too short SAP packet\n" );
653 uint8_t *p_decompressed_buffer = NULL;
654 int i_decompressed_size;
656 i_decompressed_size = Decompress( (uint8_t *)psz_sdp,
657 &p_decompressed_buffer, i_read - ( psz_sdp - (char *)p_buffer ) );
658 if( i_decompressed_size > 0 && i_decompressed_size < MAX_SAP_BUFFER )
660 memcpy( psz_sdp, p_decompressed_buffer, i_decompressed_size );
661 psz_sdp[i_decompressed_size] = '\0';
662 free( p_decompressed_buffer );
665 msg_Warn( p_sd, "Ignoring compressed sap packet" );
670 /* Add the size of authentification info */
671 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
673 msg_Warn( p_sd, "too short SAP packet\n");
676 psz_sdp += p_buffer[1];
679 /* Skip payload type */
680 /* Handle announces without \0 between SAP and SDP */
681 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
683 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
685 msg_Warn( p_sd, "empty SDP ?");
690 if( *psz_sdp == '\0' )
694 if( ( psz_sdp != psz_foo ) && strcasecmp( psz_foo, "application/sdp" ) )
696 msg_Dbg( p_sd, "unhandled content type: %s", psz_foo );
698 if( ( psz_sdp - (char *)p_buffer ) >= i_read )
700 msg_Warn( p_sd, "package without content" );
705 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
712 /* Decide whether we should add a playlist item for this SDP */
713 /* Parse connection information (c= & m= ) */
714 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
716 p_sdp->psz_uri = NULL;
719 /* Multi-media or no-parse -> pass to LIVE.COM */
720 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
721 p_sdp->i_media_type != 32 &&
722 p_sdp->i_media_type != 33) ||
723 p_sd->p_sys->b_parse == VLC_FALSE )
725 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
726 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
729 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
731 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
734 /* FIXME: we create a new announce each time the sdp changes */
735 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
739 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
744 p_sd->p_sys->pp_announces[i]->i_last = mdate();
751 if( p_sdp->i_media > 1 )
753 msg_Dbg( p_sd, "passing to LIVE.COM" );
756 CreateAnnounce( p_sd, i_hash, p_sdp );
761 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
764 playlist_item_t *p_item, *p_child;
766 sap_announce_t *p_sap = (sap_announce_t *)malloc(
767 sizeof(sap_announce_t ) );
771 EnsureUTF8( p_sdp->psz_sessionname );
772 p_sap->i_last = mdate();
773 p_sap->i_hash = i_hash;
774 p_sap->p_sdp = p_sdp;
775 p_sap->i_item_id = -1;
777 /* Create the playlist item here */
778 p_item = playlist_ItemNew( p_sd, p_sap->p_sdp->psz_uri,
779 p_sdp->psz_sessionname );
787 psz_value = GetAttribute( p_sap->p_sdp, "tool" );
788 if( psz_value != NULL )
790 vlc_input_item_AddInfo( &p_item->input, _("Session"),
791 _("Tool"), psz_value );
793 if( strcmp( p_sdp->psz_username, "-" ) )
795 vlc_input_item_AddInfo( &p_item->input, _("Session"),
796 _("User"), p_sdp->psz_username );
799 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
801 if( psz_value == NULL )
803 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
806 if( psz_value != NULL )
808 EnsureUTF8( psz_value );
810 p_child = playlist_ChildSearchName( p_sd->p_sys->p_node, psz_value );
812 if( p_child == NULL )
814 p_child = playlist_NodeCreate( p_sd->p_sys->p_playlist,
815 VIEW_CATEGORY, psz_value,
816 p_sd->p_sys->p_node );
817 p_child->i_flags &= ~PLAYLIST_SKIP_FLAG;
822 p_child = p_sd->p_sys->p_node;
825 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
826 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
828 playlist_NodeAddItem( p_sd->p_sys->p_playlist, p_item, VIEW_CATEGORY,
829 p_child, PLAYLIST_APPEND, PLAYLIST_END );
831 p_sap->i_item_id = p_item->input.i_id;
833 TAB_APPEND( p_sd->p_sys->i_announces,
834 p_sd->p_sys->pp_announces, p_sap );
839 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
843 for( i = 0 ; i< p_sdp->i_attributes; i++ )
845 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
846 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
848 return p_sdp->pp_attributes[i]->psz_value;
855 /* Fill p_sdp->psz_uri */
856 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
860 char *psz_uri = NULL;
861 char *psz_proto = NULL;
865 if( p_sdp->psz_connection )
867 psz_parse = p_sdp->psz_connection;
869 psz_eof = strchr( psz_parse, ' ' );
874 psz_parse = psz_eof + 1;
878 msg_Warn( p_obj, "unable to parse c field (1)");
882 psz_eof = strchr( psz_parse, ' ' );
887 if( !strncmp( psz_parse, "IP4", 3 ) )
891 else if( !strncmp( psz_parse, "IP6", 3 ) )
899 psz_parse = psz_eof + 1;
903 msg_Warn( p_obj, "unable to parse c field (2)");
907 psz_eof = strchr( psz_parse, '/' );
915 msg_Dbg( p_obj, "incorrect c field, %s", p_sdp->psz_connection );
917 if( p_sdp->i_in == 6 && ( isxdigit( *psz_parse ) || *psz_parse == ':' ) )
919 asprintf( &psz_uri, "[%s]", psz_parse );
921 else psz_uri = strdup( psz_parse );
926 if( p_sdp->psz_media )
928 psz_parse = p_sdp->psz_media;
930 psz_eof = strchr( psz_parse, ' ' );
936 if( strncmp( psz_parse, "audio", 5 ) &&
937 strncmp( psz_parse, "video", 5 ) )
939 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
944 psz_parse = psz_eof + 1;
948 msg_Warn( p_obj, "unable to parse m field (1)");
953 psz_eof = strchr( psz_parse, ' ' );
959 /* FIXME : multiple port ! */
960 i_port = atoi( psz_parse );
962 if( i_port <= 0 || i_port >= 65536 )
964 msg_Warn( p_obj, "invalid transport port %i", i_port );
967 psz_parse = psz_eof + 1;
971 msg_Warn( p_obj, "unable to parse m field (2)");
976 psz_eof = strchr( psz_parse, ' ' );
981 psz_proto = strdup( psz_parse );
983 psz_parse = psz_eof + 1;
984 p_sdp->i_media_type = atoi( psz_parse );
989 msg_Dbg( p_obj, "incorrect m field, %s", p_sdp->psz_media );
990 p_sdp->i_media_type = 33;
991 psz_proto = strdup( psz_parse );
995 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
998 psz_proto = strdup( "rtp" );
1000 if( psz_proto && !strncasecmp( psz_proto, "UDP", 3 ) )
1003 psz_proto = strdup( "udp" );
1006 /* FIXME: HTTP support */
1013 asprintf( &p_sdp->psz_uri, "%s://@%s:%i", psz_proto, psz_uri, i_port );
1020 /***********************************************************************
1021 * ParseSDP : SDP parsing
1022 * *********************************************************************
1023 * Validate SDP and parse all fields
1024 ***********************************************************************/
1025 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1028 vlc_bool_t b_invalid = VLC_FALSE;
1029 vlc_bool_t b_end = VLC_FALSE;
1030 if( psz_sdp == NULL )
1035 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1037 msg_Warn( p_obj, "Bad packet" );
1041 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1045 p_sdp->psz_sdp = strdup( psz_sdp );
1046 if( p_sdp->psz_sdp == NULL )
1052 p_sdp->psz_sessionname = NULL;
1053 p_sdp->psz_media = NULL;
1054 p_sdp->psz_connection = NULL;
1055 p_sdp->psz_uri = NULL;
1056 p_sdp->psz_address = NULL;
1057 p_sdp->psz_address_type= NULL;
1060 p_sdp->i_attributes = 0;
1061 p_sdp->pp_attributes = NULL;
1063 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1070 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1071 *psz_sdp == ' ' || *psz_sdp == '\t' )
1076 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1078 psz_eol = psz_sdp + strlen( psz_sdp );
1081 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1086 if( psz_eol <= psz_sdp )
1092 /* no space allowed between fields */
1093 if( psz_sdp[1] != '=' )
1095 msg_Warn( p_obj, "invalid packet" ) ;
1100 /* Now parse each line */
1101 switch( psz_sdp[0] )
1106 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1111 /* o field is <username> <session id> <version>
1112 * <network type> <address type> <address> */
1114 #define GET_FIELD( store ) \
1115 psz_eof = strchr( psz_parse, ' ' ); \
1118 *psz_eof=0; store = strdup( psz_parse ); \
1122 if( i_field != 5 ) \
1124 b_invalid = VLC_TRUE; break; \
1128 store = strdup( psz_parse ); \
1131 psz_parse = psz_eof + 1; i_field++;
1134 psz_parse = &psz_sdp[2];
1135 GET_FIELD( p_sdp->psz_username );
1136 GET_FIELD( psz_sess_id );
1138 p_sdp->i_session_id = atoll( psz_sess_id );
1140 FREE( psz_sess_id );
1142 GET_FIELD( psz_sess_id );
1143 FREE( psz_sess_id );
1145 GET_FIELD( p_sdp->psz_network_type );
1146 GET_FIELD( p_sdp->psz_address_type );
1147 GET_FIELD( p_sdp->psz_address );
1158 case( 'a' ): /* attribute */
1160 char *psz_eon = strchr( &psz_sdp[2], ':' );
1161 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1163 /* Attribute with value */
1168 p_attr->psz_field = strdup( &psz_sdp[2] );
1169 p_attr->psz_value = strdup( psz_eon );
1171 else /* Attribute without value */
1173 p_attr->psz_field = strdup( &psz_sdp[2] );
1174 p_attr->psz_value = NULL;
1177 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1181 case( 'm' ): /* Media announcement */
1183 /* If we have several medias, we pass the announcement to
1184 * LIVE.COM, so just count them */
1186 if( p_sdp->i_media == 1 )
1188 p_sdp->psz_media = strdup( &psz_sdp[2] );
1195 if( p_sdp->i_media > 1 )
1198 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1218 static int InitSocket( services_discovery_t *p_sd, char *psz_address,
1221 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, "", 0 );
1225 net_StopSend( i_fd );
1226 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1227 p_sd->p_sys->i_fd, i_fd );
1231 return VLC_EGENERIC;
1235 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1237 int i_result, i_dstsize, n;
1238 unsigned char *psz_dst;
1241 d_stream.zalloc = (alloc_func)0;
1242 d_stream.zfree = (free_func)0;
1243 d_stream.opaque = (voidpf)0;
1245 i_result = inflateInit(&d_stream);
1246 if( i_result != Z_OK )
1248 printf( "inflateInit() failed. Result: %d\n", i_result );
1252 p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
1253 i_position = p_playlist->i_index;
1255 /* Gather the complete sdp file */
1258 int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp], i_sdp_max - i_sdp - 1 );
1260 d_stream.next_in = (Bytef *)psz_src;
1261 d_stream.avail_in = i_len;
1269 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1270 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1271 d_stream.avail_out = 1000;
1273 i_result = inflate(&d_stream, Z_NO_FLUSH);
1274 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1276 printf( "Zlib decompression failed. Result: %d\n", i_result );
1280 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1281 ( i_result != Z_STREAM_END ) );
1283 i_dstsize = d_stream.total_out;
1284 inflateEnd( &d_stream );
1286 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1293 static void FreeSDP( sdp_t *p_sdp )
1296 FREE( p_sdp->psz_sdp );
1297 FREE( p_sdp->psz_sessionname );
1298 FREE( p_sdp->psz_connection );
1299 FREE( p_sdp->psz_media );
1300 FREE( p_sdp->psz_uri );
1301 FREE( p_sdp->psz_username );
1302 FREE( p_sdp->psz_network_type );
1304 FREE( p_sdp->psz_address );
1305 FREE( p_sdp->psz_address_type );
1307 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1309 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1310 FREE( p_sdp->pp_attributes[i]->psz_field );
1311 FREE( p_sdp->pp_attributes[i]->psz_value );
1312 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1318 static int RemoveAnnounce( services_discovery_t *p_sd,
1319 sap_announce_t *p_announce )
1323 if( p_announce->p_sdp ) FreeSDP( p_announce->p_sdp );
1325 if( p_announce->i_item_id > -1 )
1327 playlist_LockDelete( p_sd->p_sys->p_playlist, p_announce->i_item_id );
1330 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1332 if( p_sd->p_sys->pp_announces[i] == p_announce )
1334 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1345 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1347 /* A session is identified by
1348 * username, session_id, network type, address type and address */
1349 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1350 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1351 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1352 p_sdp1->psz_address && p_sdp2->psz_address )
1354 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1355 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1356 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1357 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1358 p_sdp1->i_session_id == p_sdp2->i_session_id )
1374 static void CacheLoad( services_discovery_t *p_sd )
1376 msg_Warn( p_sd, "Cache not implemented") ;
1379 static void CacheSave( services_discovery_t *p_sd )
1381 msg_Warn( p_sd, "Cache not implemented") ;