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() */
32 #include <vlc/input.h>
43 #ifdef HAVE_SYS_TIME_H
44 # include <sys/time.h>
51 /************************************************************************
52 * Macros and definitions
53 ************************************************************************/
55 #define MAX_LINE_LENGTH 256
57 /* SAP is always on that port */
59 /* Global-scope SAP address */
60 #define SAP_V4_GLOBAL_ADDRESS "224.2.127.254"
61 /* Organization-local SAP address */
62 #define SAP_V4_ORG_ADDRESS "239.195.255.255"
63 /* Local (smallest non-link-local scope) SAP address */
64 #define SAP_V4_LOCAL_ADDRESS "239.255.255.255"
65 /* Link-local SAP address */
66 #define SAP_V4_LINK_ADDRESS "224.0.0.255"
69 #define SAP_V6_1 "FF0"
70 /* Scope is inserted between them */
71 #define SAP_V6_2 "::2:7FFE"
72 /* See RFC3513 for list of valid scopes */
73 /* FIXME: find a way to listen to link-local scope */
74 static const char ipv6_scopes[] = "1456789ABCDE";
77 /*****************************************************************************
79 *****************************************************************************/
80 #define SAP_ADDR_TEXT N_( "SAP multicast address" )
81 #define SAP_ADDR_LONGTEXT N_( "Listen for SAP announces on another address" )
82 #define SAP_IPV4_TEXT N_( "IPv4-SAP listening" )
83 #define SAP_IPV4_LONGTEXT N_( \
84 "Set this if you want the SAP module to listen to IPv4 announces " \
85 "on the standard address." )
86 #define SAP_IPV6_TEXT N_( "IPv6-SAP listening" )
87 #define SAP_IPV6_LONGTEXT N_( \
88 "Set this if you want the SAP module to listen to IPv6 announces " \
89 "on the standard address." )
90 #define SAP_SCOPE_TEXT N_( "IPv6 SAP scope" )
91 #define SAP_SCOPE_LONGTEXT N_( \
92 "Sets the scope for IPv6 announces (default is 8)." )
93 #define SAP_TIMEOUT_TEXT N_( "SAP timeout (seconds)" )
94 #define SAP_TIMEOUT_LONGTEXT N_( \
95 "Sets the time before SAP items get deleted if no new announce " \
97 #define SAP_PARSE_TEXT N_( "Try to parse the SAP" )
98 #define SAP_PARSE_LONGTEXT N_( \
99 "When SAP can it will try to parse the SAP. If you don't select " \
100 "this, all announces will be parsed by the livedotcom module." )
101 #define SAP_STRICT_TEXT N_( "SAP Strict mode" )
102 #define SAP_STRICT_LONGTEXT N_( \
103 "When this is set, the SAP parser will discard some non-compliant " \
105 #define SAP_CACHE_TEXT N_("Use SAP cache")
106 #define SAP_CACHE_LONGTEXT N_( \
107 "If this option is selected, a SAP caching mechanism will be used. " \
108 "This will result in lower SAP startup time, but you could end up " \
109 "with items corresponding to legacy streams." )
112 static int Open ( vlc_object_t * );
113 static void Close( vlc_object_t * );
114 static int OpenDemux ( vlc_object_t * );
115 static void CloseDemux ( vlc_object_t * );
118 set_shortname( _("SAP"));
119 set_description( _("SAP announces") );
120 set_category( CAT_PLAYLIST );
121 set_subcategory( SUBCAT_PLAYLIST_SD );
123 add_string( "sap-addr", NULL, NULL,
124 SAP_ADDR_TEXT, SAP_ADDR_LONGTEXT, VLC_TRUE );
125 add_bool( "sap-ipv4", 1 , NULL,
126 SAP_IPV4_TEXT,SAP_IPV4_LONGTEXT, VLC_TRUE );
127 add_bool( "sap-ipv6", 1 , NULL,
128 SAP_IPV6_TEXT, SAP_IPV6_LONGTEXT, VLC_TRUE );
129 add_integer( "sap-timeout", 1800, NULL,
130 SAP_TIMEOUT_TEXT, SAP_TIMEOUT_LONGTEXT, VLC_TRUE );
131 add_bool( "sap-parse", 1 , NULL,
132 SAP_PARSE_TEXT,SAP_PARSE_LONGTEXT, VLC_TRUE );
133 add_bool( "sap-strict", 0 , NULL,
134 SAP_STRICT_TEXT,SAP_STRICT_LONGTEXT, VLC_TRUE );
135 add_bool( "sap-cache", 0 , NULL,
136 SAP_CACHE_TEXT,SAP_CACHE_LONGTEXT, VLC_TRUE );
138 set_capability( "services_discovery", 0 );
139 set_callbacks( Open, Close );
142 set_description( _("SDP file parser for UDP") );
143 add_shortcut( "sdp" );
144 set_capability( "demux2", 51 );
145 set_callbacks( OpenDemux, CloseDemux );
149 /*****************************************************************************
151 *****************************************************************************/
153 typedef struct sdp_t sdp_t;
154 typedef struct attribute_t attribute_t;
155 typedef struct sap_announce_t sap_announce_t;
157 /* The structure that contains sdp information */
163 char *psz_sessionname;
165 /* Raw m= and c= fields */
166 char *psz_connection;
171 char *psz_network_type;
172 char *psz_address_type;
174 int64_t i_session_id;
179 int i_in; /* IP version */
185 attribute_t **pp_attributes;
194 struct sap_announce_t
199 uint32_t i_source[4];
201 /* SAP annnounces must only contain one SDP */
205 // playlist_item_t *p_item;
208 struct services_discovery_sys_t
210 /* Socket descriptors */
215 playlist_item_t *p_node;
216 playlist_t *p_playlist;
218 /* Table of announces */
220 struct sap_announce_t **pp_announces;
234 /*****************************************************************************
236 *****************************************************************************/
240 static int Demux( demux_t *p_demux );
241 static int Control( demux_t *, int, va_list );
242 static void Run ( services_discovery_t *p_sd );
244 /* Main parsing functions */
245 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp );
246 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read );
247 static sdp_t * ParseSDP( vlc_object_t *p_sd, char* psz_sdp );
248 static sap_announce_t *CreateAnnounce( services_discovery_t *, uint16_t, sdp_t * );
249 static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
252 static void CacheLoad( services_discovery_t *p_sd );
253 static void CacheSave( services_discovery_t *p_sd );
254 /* Helper functions */
255 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
256 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
257 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port );
259 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len );
261 static void FreeSDP( sdp_t *p_sdp );
265 if( p ) { free( p ); (p) = NULL; }
266 /*****************************************************************************
267 * Open: initialize and create stuff
268 *****************************************************************************/
269 static int Open( vlc_object_t *p_this )
271 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
272 services_discovery_sys_t *p_sys = (services_discovery_sys_t *)
273 malloc( sizeof( services_discovery_sys_t ) );
275 playlist_view_t *p_view;
279 p_sys->i_timeout = var_CreateGetInteger( p_sd, "sap-timeout" );
287 p_sys->b_strict = var_CreateGetInteger( p_sd, "sap-strict");
288 p_sys->b_parse = var_CreateGetInteger( p_sd, "sap-parse" );
290 if( var_CreateGetInteger( p_sd, "sap-cache" ) )
295 if( var_CreateGetInteger( p_sd, "sap-ipv4" ) )
297 InitSocket( p_sd, SAP_V4_GLOBAL_ADDRESS, SAP_PORT );
298 InitSocket( p_sd, SAP_V4_ORG_ADDRESS, SAP_PORT );
299 InitSocket( p_sd, SAP_V4_LOCAL_ADDRESS, SAP_PORT );
300 InitSocket( p_sd, SAP_V4_LINK_ADDRESS, SAP_PORT );
302 if( var_CreateGetInteger( p_sd, "sap-ipv6" ) )
304 char psz_address[] = SAP_V6_1"0"SAP_V6_2;
307 for( c_scope = ipv6_scopes; *c_scope; c_scope++ )
309 psz_address[sizeof(SAP_V6_1) - 1] = *c_scope;
310 InitSocket( p_sd, psz_address, SAP_PORT );
314 psz_addr = var_CreateGetString( p_sd, "sap-addr" );
315 if( psz_addr && *psz_addr )
317 InitSocket( p_sd, psz_addr, SAP_PORT );
320 if( p_sys->i_fd == 0 )
322 msg_Err( p_sd, "unable to read on any address" );
326 /* Create our playlist node */
327 p_sys->p_playlist = (playlist_t *)vlc_object_find( p_sd,
330 if( !p_sys->p_playlist )
332 msg_Warn( p_sd, "unable to find playlist, cancelling SAP listening");
336 p_view = playlist_ViewFind( p_sys->p_playlist, VIEW_CATEGORY );
337 p_sys->p_node = playlist_NodeCreate( p_sys->p_playlist, VIEW_CATEGORY,
338 _("SAP"), p_view->p_root );
339 p_sys->p_node->i_flags |= PLAYLIST_RO_FLAG;
340 p_sys->p_node->i_flags &= ~PLAYLIST_SKIP_FLAG;
341 val.b_bool = VLC_TRUE;
342 var_Set( p_sys->p_playlist, "intf-change", val );
344 p_sys->i_announces = 0;
345 p_sys->pp_announces = NULL;
350 /*****************************************************************************
351 * OpenDemux: initialize and create stuff
352 *****************************************************************************/
353 static int OpenDemux( vlc_object_t *p_this )
355 demux_t *p_demux = (demux_t *)p_this;
357 int i_max_sdp = 1024;
359 char *psz_sdp = NULL;
362 if( !var_CreateGetInteger( p_demux, "sap-parse" ) )
364 /* We want livedotcom module to parse this SDP file */
371 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
373 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
374 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
375 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
381 psz_sdp = (char *)malloc( i_max_sdp );
382 if( !psz_sdp ) return VLC_EGENERIC;
384 /* Gather the complete sdp file */
387 int i_read = stream_Read( p_demux->s,
388 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
392 msg_Err( p_demux, "failed to read SDP" );
398 if( i_read < i_max_sdp - i_sdp - 1 )
400 psz_sdp[i_sdp] = '\0';
405 psz_sdp = (char *)realloc( psz_sdp, i_max_sdp );
408 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
412 msg_Warn( p_demux, "invalid SDP");
416 if( p_sdp->i_media > 1 )
421 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
423 p_sdp->psz_uri = NULL;
425 if( p_sdp->i_media_type != 33 && p_sdp->i_media_type != 32 &&
426 p_sdp->i_media_type != 14 )
429 if( p_sdp->psz_uri == NULL ) goto error;
431 p_demux->p_sys = (demux_sys_t *)malloc( sizeof(demux_sys_t) );
432 p_demux->p_sys->p_sdp = p_sdp;
433 p_demux->pf_control = Control;
434 p_demux->pf_demux = Demux;
441 if( p_sdp ) FreeSDP( p_sdp );
442 stream_Seek( p_demux->s, 0 );
446 /*****************************************************************************
448 *****************************************************************************/
449 static void Close( vlc_object_t *p_this )
451 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
452 services_discovery_sys_t *p_sys = p_sd->p_sys;
456 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
458 net_Close( p_sys->pi_fd[i] );
460 FREE( p_sys->pi_fd );
462 if( config_GetInt( p_sd, "sap-cache" ) )
467 for( i = p_sys->i_announces - 1; i>= 0; i-- )
469 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
471 FREE( p_sys->pp_announces );
473 if( p_sys->p_playlist )
475 playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node, VLC_TRUE,
477 vlc_object_release( p_sys->p_playlist );
483 /*****************************************************************************
484 * CloseDemux: Close the demuxer
485 *****************************************************************************/
486 static void CloseDemux( vlc_object_t *p_this )
491 /*****************************************************************************
492 * Run: main SAP thread
493 *****************************************************************************
494 * Listens to SAP packets, and sends them to packet_handle
495 *****************************************************************************/
496 #define MAX_SAP_BUFFER 5000
498 static void Run( services_discovery_t *p_sd )
502 /* read SAP packets */
503 while( !p_sd->b_die )
506 uint8_t p_buffer[MAX_SAP_BUFFER+1];
508 i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
509 p_sd->p_sys->i_fd, p_buffer,
510 MAX_SAP_BUFFER, 500000 );
512 /* Check for items that need deletion */
513 for( i = 0; i < p_sd->p_sys->i_announces; i++ )
515 mtime_t i_timeout = ( mtime_t ) 1000000 * p_sd->p_sys->i_timeout;
517 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
519 struct sap_announce_t *p_announce;
520 p_announce = p_sd->p_sys->pp_announces[i];
522 /* Remove the playlist item */
523 playlist_LockDelete( p_sd->p_sys->p_playlist,
524 p_announce->i_item_id );
526 /* Remove the sap_announce from the array */
527 REMOVE_ELEM( p_sd->p_sys->pp_announces,
528 p_sd->p_sys->i_announces, i );
534 /* Minimum length is > 6 */
539 msg_Warn( p_sd, "socket read error" );
544 p_buffer[i_read] = '\0';
546 /* Parse the packet */
547 ParseSAP( p_sd, p_buffer, i_read );
551 /**********************************************************************
552 * Demux: reads and demuxes data packets
553 * Return -1 if error, 0 if EOF, 1 else
554 **********************************************************************/
555 static int Demux( demux_t *p_demux )
557 sdp_t *p_sdp = p_demux->p_sys->p_sdp;
558 playlist_t *p_playlist;
560 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
563 p_playlist->status.p_item->i_flags |= PLAYLIST_DEL_FLAG;
565 playlist_Add( p_playlist, p_sdp->psz_uri, p_sdp->psz_sessionname,
566 PLAYLIST_APPEND, PLAYLIST_END );
568 vlc_object_release( p_playlist );
569 if( p_sdp ) FreeSDP( p_sdp );
574 static int Control( demux_t *p_demux, int i_query, va_list args )
579 /**************************************************************
581 **************************************************************/
583 /* i_read is at least > 6 */
584 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
586 int i_version, i_address_type, i_hash, i;
587 char *psz_sdp, *psz_foo, *psz_initial_sdp;
589 vlc_bool_t b_compressed;
590 vlc_bool_t b_need_delete = VLC_FALSE;
592 /* First, check the sap announce is correct */
593 i_version = p_buffer[0] >> 5;
596 msg_Dbg( p_sd, "strange sap version %d found", i_version );
599 i_address_type = p_buffer[0] & 0x10;
601 if( (p_buffer[0] & 0x08) != 0 )
603 msg_Dbg( p_sd, "reserved bit incorrectly set" );
607 if( (p_buffer[0] & 0x04) != 0 )
609 msg_Dbg( p_sd, "session deletion packet" );
610 b_need_delete = VLC_TRUE;
613 if( p_buffer[0] & 0x02 )
615 msg_Dbg( p_sd, "encrypted packet, unsupported" );
619 b_compressed = p_buffer[0] & 0x01;
621 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
623 if( p_sd->p_sys->b_strict && i_hash == 0 )
625 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
629 psz_sdp = (char *)p_buffer + 4;
630 psz_initial_sdp = psz_sdp;
632 if( i_address_type == 0 ) /* ipv4 source address */
637 msg_Warn( p_sd, "too short SAP packet\n" );
641 else /* ipv6 source address */
646 msg_Warn( p_sd, "too short SAP packet\n" );
654 uint8_t *p_decompressed_buffer = NULL;
655 int i_decompressed_size;
657 i_decompressed_size = Decompress( (uint8_t *)psz_sdp,
658 &p_decompressed_buffer, i_read - ( psz_sdp - (char *)p_buffer ) );
659 if( i_decompressed_size > 0 && i_decompressed_size < MAX_SAP_BUFFER )
661 memcpy( psz_sdp, p_decompressed_buffer, i_decompressed_size );
662 psz_sdp[i_decompressed_size] = '\0';
663 free( p_decompressed_buffer );
666 msg_Warn( p_sd, "Ignoring compressed sap packet" );
671 /* Add the size of authentification info */
672 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
674 msg_Warn( p_sd, "too short SAP packet\n");
677 psz_sdp += p_buffer[1];
680 /* Skip payload type */
681 /* Handle announces without \0 between SAP and SDP */
682 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
684 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
686 msg_Warn( p_sd, "empty SDP ?");
691 if( *psz_sdp == '\0' )
695 if( ( psz_sdp != psz_foo ) && strcasecmp( psz_foo, "application/sdp" ) )
697 msg_Dbg( p_sd, "unhandled content type: %s", psz_foo );
699 if( ( psz_sdp - (char *)p_buffer ) >= i_read )
701 msg_Warn( p_sd, "package without content" );
706 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
713 /* Decide whether we should add a playlist item for this SDP */
714 /* Parse connection information (c= & m= ) */
715 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
717 p_sdp->psz_uri = NULL;
720 /* Multi-media or no-parse -> pass to LIVE.COM */
721 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
722 p_sdp->i_media_type != 32 &&
723 p_sdp->i_media_type != 33) ||
724 p_sd->p_sys->b_parse == VLC_FALSE )
726 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
727 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
730 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
732 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
735 /* FIXME: we create a new announce each time the sdp changes */
736 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
740 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
745 p_sd->p_sys->pp_announces[i]->i_last = mdate();
752 if( p_sdp->i_media > 1 )
754 msg_Dbg( p_sd, "passing to LIVE.COM" );
757 CreateAnnounce( p_sd, i_hash, p_sdp );
762 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
765 playlist_item_t *p_item, *p_child;
767 sap_announce_t *p_sap = (sap_announce_t *)malloc(
768 sizeof(sap_announce_t ) );
772 EnsureUTF8( p_sdp->psz_sessionname );
773 p_sap->i_last = mdate();
774 p_sap->i_hash = i_hash;
775 p_sap->p_sdp = p_sdp;
776 p_sap->i_item_id = -1;
778 /* Create the playlist item here */
779 p_item = playlist_ItemNew( p_sd, p_sap->p_sdp->psz_uri,
780 p_sdp->psz_sessionname );
788 psz_value = GetAttribute( p_sap->p_sdp, "tool" );
789 if( psz_value != NULL )
791 vlc_input_item_AddInfo( &p_item->input, _("Session"),
792 _("Tool"), psz_value );
794 if( strcmp( p_sdp->psz_username, "-" ) )
796 vlc_input_item_AddInfo( &p_item->input, _("Session"),
797 _("User"), p_sdp->psz_username );
800 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
802 if( psz_value == NULL )
804 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
807 if( psz_value != NULL )
809 EnsureUTF8( psz_value );
811 p_child = playlist_ChildSearchName( p_sd->p_sys->p_node, psz_value );
813 if( p_child == NULL )
815 p_child = playlist_NodeCreate( p_sd->p_sys->p_playlist,
816 VIEW_CATEGORY, psz_value,
817 p_sd->p_sys->p_node );
818 p_child->i_flags &= ~PLAYLIST_SKIP_FLAG;
823 p_child = p_sd->p_sys->p_node;
826 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
827 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
829 playlist_NodeAddItem( p_sd->p_sys->p_playlist, p_item, VIEW_CATEGORY,
830 p_child, PLAYLIST_APPEND, PLAYLIST_END );
832 p_sap->i_item_id = p_item->input.i_id;
834 TAB_APPEND( p_sd->p_sys->i_announces,
835 p_sd->p_sys->pp_announces, p_sap );
840 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
844 for( i = 0 ; i< p_sdp->i_attributes; i++ )
846 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
847 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
849 return p_sdp->pp_attributes[i]->psz_value;
856 /* Fill p_sdp->psz_uri */
857 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
861 char *psz_uri = NULL;
862 char *psz_proto = NULL;
866 if( p_sdp->psz_connection )
868 psz_parse = p_sdp->psz_connection;
870 psz_eof = strchr( psz_parse, ' ' );
875 psz_parse = psz_eof + 1;
879 msg_Warn( p_obj, "unable to parse c field (1)");
883 psz_eof = strchr( psz_parse, ' ' );
888 if( !strncmp( psz_parse, "IP4", 3 ) )
892 else if( !strncmp( psz_parse, "IP6", 3 ) )
900 psz_parse = psz_eof + 1;
904 msg_Warn( p_obj, "unable to parse c field (2)");
908 psz_eof = strchr( psz_parse, '/' );
916 msg_Dbg( p_obj, "incorrect c field, %s", p_sdp->psz_connection );
918 if( p_sdp->i_in == 6 && ( isxdigit( *psz_parse ) || *psz_parse == ':' ) )
920 asprintf( &psz_uri, "[%s]", psz_parse );
922 else psz_uri = strdup( psz_parse );
927 if( p_sdp->psz_media )
929 psz_parse = p_sdp->psz_media;
931 psz_eof = strchr( psz_parse, ' ' );
937 if( strncmp( psz_parse, "audio", 5 ) &&
938 strncmp( psz_parse, "video", 5 ) )
940 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
945 psz_parse = psz_eof + 1;
949 msg_Warn( p_obj, "unable to parse m field (1)");
954 psz_eof = strchr( psz_parse, ' ' );
960 /* FIXME : multiple port ! */
961 i_port = atoi( psz_parse );
963 if( i_port <= 0 || i_port >= 65536 )
965 msg_Warn( p_obj, "invalid transport port %i", i_port );
968 psz_parse = psz_eof + 1;
972 msg_Warn( p_obj, "unable to parse m field (2)");
977 psz_eof = strchr( psz_parse, ' ' );
982 psz_proto = strdup( psz_parse );
984 psz_parse = psz_eof + 1;
985 p_sdp->i_media_type = atoi( psz_parse );
990 msg_Dbg( p_obj, "incorrect m field, %s", p_sdp->psz_media );
991 p_sdp->i_media_type = 33;
992 psz_proto = strdup( psz_parse );
996 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
999 psz_proto = strdup( "rtp" );
1001 if( psz_proto && !strncasecmp( psz_proto, "UDP", 3 ) )
1004 psz_proto = strdup( "udp" );
1007 /* FIXME: HTTP support */
1014 asprintf( &p_sdp->psz_uri, "%s://@%s:%i", psz_proto, psz_uri, i_port );
1021 /***********************************************************************
1022 * ParseSDP : SDP parsing
1023 * *********************************************************************
1024 * Validate SDP and parse all fields
1025 ***********************************************************************/
1026 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1029 vlc_bool_t b_invalid = VLC_FALSE;
1030 vlc_bool_t b_end = VLC_FALSE;
1031 if( psz_sdp == NULL )
1036 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1038 msg_Warn( p_obj, "Bad packet" );
1042 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1046 p_sdp->psz_sdp = strdup( psz_sdp );
1047 if( p_sdp->psz_sdp == NULL )
1053 p_sdp->psz_sessionname = NULL;
1054 p_sdp->psz_media = NULL;
1055 p_sdp->psz_connection = NULL;
1056 p_sdp->psz_uri = NULL;
1057 p_sdp->psz_address = NULL;
1058 p_sdp->psz_address_type= NULL;
1061 p_sdp->i_attributes = 0;
1062 p_sdp->pp_attributes = NULL;
1064 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1071 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1072 *psz_sdp == ' ' || *psz_sdp == '\t' )
1077 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1079 psz_eol = psz_sdp + strlen( psz_sdp );
1082 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1087 if( psz_eol <= psz_sdp )
1093 /* no space allowed between fields */
1094 if( psz_sdp[1] != '=' )
1096 msg_Warn( p_obj, "invalid packet" ) ;
1101 /* Now parse each line */
1102 switch( psz_sdp[0] )
1107 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1112 /* o field is <username> <session id> <version>
1113 * <network type> <address type> <address> */
1115 #define GET_FIELD( store ) \
1116 psz_eof = strchr( psz_parse, ' ' ); \
1119 *psz_eof=0; store = strdup( psz_parse ); \
1123 if( i_field != 5 ) \
1125 b_invalid = VLC_TRUE; break; \
1129 store = strdup( psz_parse ); \
1132 psz_parse = psz_eof + 1; i_field++;
1135 psz_parse = &psz_sdp[2];
1136 GET_FIELD( p_sdp->psz_username );
1137 GET_FIELD( psz_sess_id );
1139 p_sdp->i_session_id = atoll( psz_sess_id );
1141 FREE( psz_sess_id );
1143 GET_FIELD( psz_sess_id );
1144 FREE( psz_sess_id );
1146 GET_FIELD( p_sdp->psz_network_type );
1147 GET_FIELD( p_sdp->psz_address_type );
1148 GET_FIELD( p_sdp->psz_address );
1159 case( 'a' ): /* attribute */
1161 char *psz_eon = strchr( &psz_sdp[2], ':' );
1162 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1164 /* Attribute with value */
1169 p_attr->psz_field = strdup( &psz_sdp[2] );
1170 p_attr->psz_value = strdup( psz_eon );
1172 else /* Attribute without value */
1174 p_attr->psz_field = strdup( &psz_sdp[2] );
1175 p_attr->psz_value = NULL;
1178 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1182 case( 'm' ): /* Media announcement */
1184 /* If we have several medias, we pass the announcement to
1185 * LIVE.COM, so just count them */
1187 if( p_sdp->i_media == 1 )
1189 p_sdp->psz_media = strdup( &psz_sdp[2] );
1196 if( p_sdp->i_media > 1 )
1199 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1219 static int InitSocket( services_discovery_t *p_sd, char *psz_address,
1222 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, "", 0 );
1226 net_StopSend( i_fd );
1227 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1228 p_sd->p_sys->i_fd, i_fd );
1232 return VLC_EGENERIC;
1236 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1238 int i_result, i_dstsize, n;
1239 unsigned char *psz_dst;
1242 d_stream.zalloc = (alloc_func)0;
1243 d_stream.zfree = (free_func)0;
1244 d_stream.opaque = (voidpf)0;
1246 i_result = inflateInit(&d_stream);
1247 if( i_result != Z_OK )
1249 printf( "inflateInit() failed. Result: %d\n", i_result );
1253 p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
1254 i_position = p_playlist->i_index;
1256 /* Gather the complete sdp file */
1259 int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp], i_sdp_max - i_sdp - 1 );
1261 d_stream.next_in = (Bytef *)psz_src;
1262 d_stream.avail_in = i_len;
1270 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1271 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1272 d_stream.avail_out = 1000;
1274 i_result = inflate(&d_stream, Z_NO_FLUSH);
1275 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1277 printf( "Zlib decompression failed. Result: %d\n", i_result );
1281 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1282 ( i_result != Z_STREAM_END ) );
1284 i_dstsize = d_stream.total_out;
1285 inflateEnd( &d_stream );
1287 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1294 static void FreeSDP( sdp_t *p_sdp )
1297 FREE( p_sdp->psz_sdp );
1298 FREE( p_sdp->psz_sessionname );
1299 FREE( p_sdp->psz_connection );
1300 FREE( p_sdp->psz_media );
1301 FREE( p_sdp->psz_uri );
1302 FREE( p_sdp->psz_username );
1303 FREE( p_sdp->psz_network_type );
1305 FREE( p_sdp->psz_address );
1306 FREE( p_sdp->psz_address_type );
1308 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1310 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1311 FREE( p_sdp->pp_attributes[i]->psz_field );
1312 FREE( p_sdp->pp_attributes[i]->psz_value );
1313 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1319 static int RemoveAnnounce( services_discovery_t *p_sd,
1320 sap_announce_t *p_announce )
1324 if( p_announce->p_sdp ) FreeSDP( p_announce->p_sdp );
1326 if( p_announce->i_item_id > -1 )
1328 playlist_LockDelete( p_sd->p_sys->p_playlist, p_announce->i_item_id );
1331 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1333 if( p_sd->p_sys->pp_announces[i] == p_announce )
1335 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1346 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1348 /* A session is identified by
1349 * username, session_id, network type, address type and address */
1350 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1351 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1352 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1353 p_sdp1->psz_address && p_sdp2->psz_address )
1355 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1356 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1357 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1358 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1359 p_sdp1->i_session_id == p_sdp2->i_session_id )
1375 static void CacheLoad( services_discovery_t *p_sd )
1377 msg_Warn( p_sd, "Cache not implemented") ;
1380 static void CacheSave( services_discovery_t *p_sd )
1382 msg_Warn( p_sd, "Cache not implemented") ;