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 = (uint8_t*)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;
588 uint8_t *psz_initial_sdp;
590 vlc_bool_t b_compressed;
591 vlc_bool_t b_need_delete = VLC_FALSE;
593 int i_decompressed_size;
594 uint8_t *p_decompressed_buffer;
598 /* First, check the sap announce is correct */
599 i_version = p_buffer[0] >> 5;
602 msg_Dbg( p_sd, "strange sap version %d found", i_version );
605 i_address_type = p_buffer[0] & 0x10;
607 if( (p_buffer[0] & 0x08) != 0 )
609 msg_Dbg( p_sd, "reserved bit incorrectly set" );
613 if( (p_buffer[0] & 0x04) != 0 )
615 msg_Dbg( p_sd, "session deletion packet" );
616 b_need_delete = VLC_TRUE;
619 if( p_buffer[0] & 0x02 )
621 msg_Dbg( p_sd, "encrypted packet, unsupported" );
625 b_compressed = p_buffer[0] & 0x01;
627 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
629 if( p_sd->p_sys->b_strict && i_hash == 0 )
631 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
635 psz_sdp = &p_buffer[4];
636 psz_initial_sdp = psz_sdp;
638 if( i_address_type == 0 ) /* ipv4 source address */
643 msg_Warn( p_sd, "too short SAP packet\n" );
647 else /* ipv6 source address */
652 msg_Warn( p_sd, "too short SAP packet\n" );
660 i_decompressed_size = Decompress( psz_sdp,
661 &p_decompressed_buffer,i_read - ( psz_sdp - p_buffer ) );
662 if( i_decompressed_size > 0 && i_decompressed_size < MAX_SAP_BUFFER )
664 memcpy( psz_sdp, p_decompressed_buffer, i_decompressed_size );
665 psz_sdp[i_decompressed_size] = '\0';
666 free( p_decompressed_buffer );
669 msg_Warn( p_sd, "Ignoring compressed sap packet" );
674 /* Add the size of authentification info */
675 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
677 msg_Warn( p_sd, "too short SAP packet\n");
680 psz_sdp += p_buffer[1];
683 /* Skip payload type */
684 /* Handle announces without \0 between SAP and SDP */
685 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
687 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
689 msg_Warn( p_sd, "empty SDP ?");
694 if( *psz_sdp == '\0' )
698 if( psz_sdp != psz_foo && strcasecmp( psz_foo, "application/sdp" ) )
700 msg_Dbg( p_sd, "unhandled content type: %s", psz_foo );
702 if( psz_sdp -p_buffer >= i_read )
704 msg_Warn( p_sd, "package without content" );
709 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
716 /* Decide whether we should add a playlist item for this SDP */
717 /* Parse connection information (c= & m= ) */
718 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
720 p_sdp->psz_uri = NULL;
723 /* Multi-media or no-parse -> pass to LIVE.COM */
724 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
725 p_sdp->i_media_type != 32 &&
726 p_sdp->i_media_type != 33) ||
727 p_sd->p_sys->b_parse == VLC_FALSE )
729 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
730 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
733 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
735 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
738 /* FIXME: we create a new announce each time the sdp changes */
739 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
743 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
748 p_sd->p_sys->pp_announces[i]->i_last = mdate();
755 if( p_sdp->i_media > 1 )
757 msg_Dbg( p_sd, "passing to LIVE.COM" );
760 CreateAnnounce( p_sd, i_hash, p_sdp );
765 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
768 playlist_item_t *p_item, *p_child;
770 sap_announce_t *p_sap = (sap_announce_t *)malloc(
771 sizeof(sap_announce_t ) );
775 EnsureUTF8( p_sdp->psz_sessionname );
776 p_sap->i_last = mdate();
777 p_sap->i_hash = i_hash;
778 p_sap->p_sdp = p_sdp;
779 p_sap->i_item_id = -1;
781 /* Create the playlist item here */
782 p_item = playlist_ItemNew( p_sd, p_sap->p_sdp->psz_uri,
783 p_sdp->psz_sessionname );
791 psz_value = GetAttribute( p_sap->p_sdp, "tool" );
792 if( psz_value != NULL )
794 vlc_input_item_AddInfo( &p_item->input, _("Session"),
795 _("Tool"), psz_value );
797 if( strcmp( p_sdp->psz_username, "-" ) )
799 vlc_input_item_AddInfo( &p_item->input, _("Session"),
800 _("User"), p_sdp->psz_username );
803 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
805 if( psz_value == NULL )
807 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
810 if( psz_value != NULL )
812 EnsureUTF8( psz_value );
814 p_child = playlist_ChildSearchName( p_sd->p_sys->p_node, psz_value );
816 if( p_child == NULL )
818 p_child = playlist_NodeCreate( p_sd->p_sys->p_playlist,
819 VIEW_CATEGORY, psz_value,
820 p_sd->p_sys->p_node );
821 p_child->i_flags &= ~PLAYLIST_SKIP_FLAG;
826 p_child = p_sd->p_sys->p_node;
829 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
830 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
832 playlist_NodeAddItem( p_sd->p_sys->p_playlist, p_item, VIEW_CATEGORY,
833 p_child, PLAYLIST_APPEND, PLAYLIST_END );
835 p_sap->i_item_id = p_item->input.i_id;
837 TAB_APPEND( p_sd->p_sys->i_announces,
838 p_sd->p_sys->pp_announces, p_sap );
843 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
847 for( i = 0 ; i< p_sdp->i_attributes; i++ )
849 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
850 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
852 return p_sdp->pp_attributes[i]->psz_value;
859 /* Fill p_sdp->psz_uri */
860 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
864 char *psz_uri = NULL;
865 char *psz_proto = NULL;
869 if( p_sdp->psz_connection )
871 psz_parse = p_sdp->psz_connection;
873 psz_eof = strchr( psz_parse, ' ' );
878 psz_parse = psz_eof + 1;
882 msg_Warn( p_obj, "unable to parse c field (1)");
886 psz_eof = strchr( psz_parse, ' ' );
891 if( !strncmp( psz_parse, "IP4", 3 ) )
895 else if( !strncmp( psz_parse, "IP6", 3 ) )
903 psz_parse = psz_eof + 1;
907 msg_Warn( p_obj, "unable to parse c field (2)");
911 psz_eof = strchr( psz_parse, '/' );
919 msg_Dbg( p_obj, "incorrect c field, %s", p_sdp->psz_connection );
921 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 if( net_AddressIsMulticast( p_obj, psz_uri ) )
1015 asprintf( &p_sdp->psz_uri, "%s://@%s:%i", psz_proto, psz_uri, i_port );
1019 asprintf( &p_sdp->psz_uri, "%s://%s:%i", psz_proto, psz_uri, i_port );
1026 /***********************************************************************
1027 * ParseSDP : SDP parsing
1028 * *********************************************************************
1029 * Validate SDP and parse all fields
1030 ***********************************************************************/
1031 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1034 vlc_bool_t b_invalid = VLC_FALSE;
1035 vlc_bool_t b_end = VLC_FALSE;
1036 if( psz_sdp == NULL )
1041 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1043 msg_Warn( p_obj, "Bad packet" );
1047 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1051 p_sdp->psz_sdp = strdup( psz_sdp );
1052 if( p_sdp->psz_sdp == NULL )
1058 p_sdp->psz_sessionname = NULL;
1059 p_sdp->psz_media = NULL;
1060 p_sdp->psz_connection = NULL;
1061 p_sdp->psz_uri = NULL;
1062 p_sdp->psz_address = NULL;
1063 p_sdp->psz_address_type= NULL;
1066 p_sdp->i_attributes = 0;
1067 p_sdp->pp_attributes = NULL;
1069 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1076 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1077 *psz_sdp == ' ' || *psz_sdp == '\t' )
1082 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1084 psz_eol = psz_sdp + strlen( psz_sdp );
1087 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1092 if( psz_eol <= psz_sdp )
1098 /* no space allowed between fields */
1099 if( psz_sdp[1] != '=' )
1101 msg_Warn( p_obj, "invalid packet" ) ;
1106 /* Now parse each line */
1107 switch( psz_sdp[0] )
1112 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1117 /* o field is <username> <session id> <version>
1118 * <network type> <address type> <address> */
1120 #define GET_FIELD( store ) \
1121 psz_eof = strchr( psz_parse, ' ' ); \
1124 *psz_eof=0; store = strdup( psz_parse ); \
1128 if( i_field != 5 ) \
1130 b_invalid = VLC_TRUE; break; \
1134 store = strdup( psz_parse ); \
1137 psz_parse = psz_eof + 1; i_field++;
1140 psz_parse = &psz_sdp[2];
1141 GET_FIELD( p_sdp->psz_username );
1142 GET_FIELD( psz_sess_id );
1144 p_sdp->i_session_id = atoll( psz_sess_id );
1146 FREE( psz_sess_id );
1148 GET_FIELD( psz_sess_id );
1149 FREE( psz_sess_id );
1151 GET_FIELD( p_sdp->psz_network_type );
1152 GET_FIELD( p_sdp->psz_address_type );
1153 GET_FIELD( p_sdp->psz_address );
1164 case( 'a' ): /* attribute */
1166 char *psz_eon = strchr( &psz_sdp[2], ':' );
1167 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1169 /* Attribute with value */
1174 p_attr->psz_field = strdup( &psz_sdp[2] );
1175 p_attr->psz_value = strdup( psz_eon );
1177 else /* Attribute without value */
1179 p_attr->psz_field = strdup( &psz_sdp[2] );
1180 p_attr->psz_value = NULL;
1183 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1187 case( 'm' ): /* Media announcement */
1189 /* If we have several medias, we pass the announcement to
1190 * LIVE.COM, so just count them */
1192 if( p_sdp->i_media == 1 )
1194 p_sdp->psz_media = strdup( &psz_sdp[2] );
1201 if( p_sdp->i_media > 1 )
1204 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1224 static int InitSocket( services_discovery_t *p_sd, char *psz_address,
1227 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, "", 0 );
1231 net_StopSend( i_fd );
1232 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1233 p_sd->p_sys->i_fd, i_fd );
1237 return VLC_EGENERIC;
1241 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1243 int i_result, i_dstsize, n;
1244 unsigned char *psz_dst;
1247 d_stream.zalloc = (alloc_func)0;
1248 d_stream.zfree = (free_func)0;
1249 d_stream.opaque = (voidpf)0;
1251 i_result = inflateInit(&d_stream);
1252 if( i_result != Z_OK )
1254 printf( "inflateInit() failed. Result: %d\n", i_result );
1258 p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
1259 i_position = p_playlist->i_index;
1261 /* Gather the complete sdp file */
1264 int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp], i_sdp_max - i_sdp - 1 );
1266 d_stream.next_in = (Bytef *)psz_src;
1267 d_stream.avail_in = i_len;
1275 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1276 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1277 d_stream.avail_out = 1000;
1279 i_result = inflate(&d_stream, Z_NO_FLUSH);
1280 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1282 printf( "Zlib decompression failed. Result: %d\n", i_result );
1286 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1287 ( i_result != Z_STREAM_END ) );
1289 i_dstsize = d_stream.total_out;
1290 inflateEnd( &d_stream );
1292 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1299 static void FreeSDP( sdp_t *p_sdp )
1302 FREE( p_sdp->psz_sdp );
1303 FREE( p_sdp->psz_sessionname );
1304 FREE( p_sdp->psz_connection );
1305 FREE( p_sdp->psz_media );
1306 FREE( p_sdp->psz_uri );
1307 FREE( p_sdp->psz_username );
1308 FREE( p_sdp->psz_network_type );
1310 FREE( p_sdp->psz_address );
1311 FREE( p_sdp->psz_address_type );
1313 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1315 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1316 FREE( p_sdp->pp_attributes[i]->psz_field );
1317 FREE( p_sdp->pp_attributes[i]->psz_value );
1318 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1324 static int RemoveAnnounce( services_discovery_t *p_sd,
1325 sap_announce_t *p_announce )
1329 if( p_announce->p_sdp ) FreeSDP( p_announce->p_sdp );
1331 if( p_announce->i_item_id > -1 )
1333 playlist_LockDelete( p_sd->p_sys->p_playlist, p_announce->i_item_id );
1336 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1338 if( p_sd->p_sys->pp_announces[i] == p_announce )
1340 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1351 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1353 /* A session is identified by
1354 * username, session_id, network type, address type and address */
1355 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1356 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1357 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1358 p_sdp1->psz_address && p_sdp2->psz_address )
1360 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1361 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1362 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1363 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1364 p_sdp1->i_session_id == p_sdp2->i_session_id )
1380 static void CacheLoad( services_discovery_t *p_sd )
1382 msg_Warn( p_sd, "Cache not implemented") ;
1385 static void CacheSave( services_discovery_t *p_sd )
1387 msg_Warn( p_sd, "Cache not implemented") ;