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 static const char ipv6_scopes[] = "12456789ABCDE";
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 /* charset conversion */
218 vlc_iconv_t iconvHandle;
220 /* Table of announces */
222 struct sap_announce_t **pp_announces;
236 /*****************************************************************************
238 *****************************************************************************/
242 static int Demux( demux_t *p_demux );
243 static int Control( demux_t *, int, va_list );
244 static void Run ( services_discovery_t *p_sd );
246 /* Main parsing functions */
247 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp );
248 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read );
249 static sdp_t * ParseSDP( vlc_object_t *p_sd, char* psz_sdp );
250 static sap_announce_t *CreateAnnounce( services_discovery_t *, uint16_t, sdp_t * );
251 static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
254 static void CacheLoad( services_discovery_t *p_sd );
255 static void CacheSave( services_discovery_t *p_sd );
256 /* Helper functions */
257 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
258 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
259 static char *convert_from_utf8( struct services_discovery_t *p_sd,
261 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port );
263 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len );
265 static void FreeSDP( sdp_t *p_sdp );
269 if( p ) { free( p ); (p) = NULL; }
270 /*****************************************************************************
271 * Open: initialize and create stuff
272 *****************************************************************************/
273 static int Open( vlc_object_t *p_this )
275 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
276 services_discovery_sys_t *p_sys = (services_discovery_sys_t *)
277 malloc( sizeof( services_discovery_sys_t ) );
279 playlist_view_t *p_view;
280 char *psz_addr, *psz_charset;
283 p_sys->i_timeout = var_CreateGetInteger( p_sd, "sap-timeout" );
285 vlc_current_charset( &psz_charset );
286 p_sys->iconvHandle = vlc_iconv_open( psz_charset, "UTF-8" );
288 if( p_sys->iconvHandle == (vlc_iconv_t)(-1) )
290 msg_Err( p_sd, "unable to perform characters conversion" );
300 p_sys->b_strict = var_CreateGetInteger( p_sd, "sap-strict");
301 p_sys->b_parse = var_CreateGetInteger( p_sd, "sap-parse" );
303 if( var_CreateGetInteger( p_sd, "sap-cache" ) )
308 if( var_CreateGetInteger( p_sd, "sap-ipv4" ) )
310 InitSocket( p_sd, SAP_V4_GLOBAL_ADDRESS, SAP_PORT );
311 InitSocket( p_sd, SAP_V4_ORG_ADDRESS, SAP_PORT );
312 InitSocket( p_sd, SAP_V4_LOCAL_ADDRESS, SAP_PORT );
313 InitSocket( p_sd, SAP_V4_LINK_ADDRESS, SAP_PORT );
315 if( var_CreateGetInteger( p_sd, "sap-ipv6" ) )
317 char psz_address[] = SAP_V6_1"0"SAP_V6_2;
320 for( c_scope = ipv6_scopes; *c_scope; c_scope++ )
322 psz_address[sizeof(SAP_V6_1) - 1] = *c_scope;
323 InitSocket( p_sd, psz_address, SAP_PORT );
327 psz_addr = var_CreateGetString( p_sd, "sap-addr" );
328 if( psz_addr && *psz_addr )
330 InitSocket( p_sd, psz_addr, SAP_PORT );
333 if( p_sys->i_fd == 0 )
335 msg_Err( p_sd, "unable to read on any address" );
339 /* Create our playlist node */
340 p_sys->p_playlist = (playlist_t *)vlc_object_find( p_sd,
343 if( !p_sys->p_playlist )
345 msg_Warn( p_sd, "unable to find playlist, cancelling SAP listening");
349 p_view = playlist_ViewFind( p_sys->p_playlist, VIEW_CATEGORY );
350 p_sys->p_node = playlist_NodeCreate( p_sys->p_playlist, VIEW_CATEGORY,
351 _("SAP"), p_view->p_root );
352 p_sys->p_node->i_flags |= PLAYLIST_RO_FLAG;
353 p_sys->p_node->i_flags =~ PLAYLIST_SKIP_FLAG;
354 val.b_bool = VLC_TRUE;
355 var_Set( p_sys->p_playlist, "intf-change", val );
357 p_sys->i_announces = 0;
358 p_sys->pp_announces = NULL;
363 /*****************************************************************************
364 * OpenDemux: initialize and create stuff
365 *****************************************************************************/
366 static int OpenDemux( vlc_object_t *p_this )
368 demux_t *p_demux = (demux_t *)p_this;
370 int i_max_sdp = 1024;
372 char *psz_sdp = NULL;
378 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
380 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
381 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
382 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
388 psz_sdp = (char *)malloc( i_max_sdp );
389 if( !psz_sdp ) return VLC_EGENERIC;
391 /* Gather the complete sdp file */
394 int i_read = stream_Read( p_demux->s,
395 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
399 msg_Err( p_demux, "failed to read SDP" );
405 if( i_read < i_max_sdp - i_sdp - 1 )
407 psz_sdp[i_sdp] = '\0';
412 psz_sdp = (uint8_t*)realloc( psz_sdp, i_max_sdp );
415 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
419 msg_Warn( p_demux, "invalid SDP");
423 if( p_sdp->i_media > 1 )
428 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
430 p_sdp->psz_uri = NULL;
432 if( p_sdp->i_media_type != 33 && p_sdp->i_media_type != 32 &&
433 p_sdp->i_media_type != 14 )
436 if( p_sdp->psz_uri == NULL ) goto error;
438 p_demux->p_sys = (demux_sys_t *)malloc( sizeof(demux_sys_t) );
439 p_demux->p_sys->p_sdp = p_sdp;
440 p_demux->pf_control = Control;
441 p_demux->pf_demux = Demux;
448 if( p_sdp ) FreeSDP( p_sdp );
449 stream_Seek( p_demux->s, 0 );
453 /*****************************************************************************
455 *****************************************************************************/
456 static void Close( vlc_object_t *p_this )
458 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
459 services_discovery_sys_t *p_sys = p_sd->p_sys;
463 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
465 net_Close( p_sys->pi_fd[i] );
467 FREE( p_sys->pi_fd );
469 if( config_GetInt( p_sd, "sap-cache" ) )
474 for( i = p_sys->i_announces - 1; i>= 0; i-- )
476 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
478 FREE( p_sys->pp_announces );
480 if( p_sys->p_playlist )
482 playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node, VLC_TRUE,
484 vlc_object_release( p_sys->p_playlist );
487 vlc_iconv_close( p_sys->iconvHandle );
492 /*****************************************************************************
493 * CloseDemux: Close the demuxer
494 *****************************************************************************/
495 static void CloseDemux( vlc_object_t *p_this )
500 /*****************************************************************************
501 * Run: main SAP thread
502 *****************************************************************************
503 * Listens to SAP packets, and sends them to packet_handle
504 *****************************************************************************/
505 #define MAX_SAP_BUFFER 5000
507 static void Run( services_discovery_t *p_sd )
511 /* read SAP packets */
512 while( !p_sd->b_die )
515 uint8_t p_buffer[MAX_SAP_BUFFER+1];
517 i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
518 p_sd->p_sys->i_fd, p_buffer,
519 MAX_SAP_BUFFER, 500000 );
521 /* Check for items that need deletion */
522 for( i = 0; i < p_sd->p_sys->i_announces; i++ )
524 mtime_t i_timeout = ( mtime_t ) 1000000 * p_sd->p_sys->i_timeout;
526 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
528 struct sap_announce_t *p_announce;
529 p_announce = p_sd->p_sys->pp_announces[i];
531 /* Remove the playlist item */
532 playlist_LockDelete( p_sd->p_sys->p_playlist,
533 p_announce->i_item_id );
535 /* Remove the sap_announce from the array */
536 REMOVE_ELEM( p_sd->p_sys->pp_announces,
537 p_sd->p_sys->i_announces, i );
543 /* Minimum length is > 6 */
548 msg_Warn( p_sd, "socket read error" );
553 p_buffer[i_read] = '\0';
555 /* Parse the packet */
556 ParseSAP( p_sd, p_buffer, i_read );
560 /**********************************************************************
561 * Demux: reads and demuxes data packets
562 * Return -1 if error, 0 if EOF, 1 else
563 **********************************************************************/
564 static int Demux( demux_t *p_demux )
566 sdp_t *p_sdp = p_demux->p_sys->p_sdp;
567 playlist_t *p_playlist;
569 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
572 p_playlist->status.p_item->i_flags |= PLAYLIST_DEL_FLAG;
574 playlist_Add( p_playlist, p_sdp->psz_uri, p_sdp->psz_sessionname,
575 PLAYLIST_APPEND, PLAYLIST_END );
577 vlc_object_release( p_playlist );
578 if( p_sdp ) FreeSDP( p_sdp );
583 static int Control( demux_t *p_demux, int i_query, va_list args )
588 /**************************************************************
590 **************************************************************/
592 /* i_read is at least > 6 */
593 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
595 int i_version, i_address_type, i_hash, i;
597 uint8_t *psz_initial_sdp;
599 vlc_bool_t b_compressed;
600 vlc_bool_t b_need_delete = VLC_FALSE;
602 int i_decompressed_size;
603 uint8_t *p_decompressed_buffer;
607 /* First, check the sap announce is correct */
608 i_version = p_buffer[0] >> 5;
611 msg_Dbg( p_sd, "strange sap version %d found", i_version );
614 i_address_type = p_buffer[0] & 0x10;
616 if( (p_buffer[0] & 0x08) != 0 )
618 msg_Dbg( p_sd, "reserved bit incorrectly set" );
622 if( (p_buffer[0] & 0x04) != 0 )
624 msg_Dbg( p_sd, "session deletion packet" );
625 b_need_delete = VLC_TRUE;
628 if( p_buffer[0] & 0x02 )
630 msg_Dbg( p_sd, "encrypted packet, unsupported" );
634 b_compressed = p_buffer[0] & 0x01;
636 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
638 if( p_sd->p_sys->b_strict && i_hash == 0 )
640 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
644 psz_sdp = &p_buffer[4];
645 psz_initial_sdp = psz_sdp;
647 if( i_address_type == 0 ) /* ipv4 source address */
652 msg_Warn( p_sd, "too short SAP packet\n" );
656 else /* ipv6 source address */
661 msg_Warn( p_sd, "too short SAP packet\n" );
669 i_decompressed_size = Decompress( psz_sdp,
670 &p_decompressed_buffer,i_read - ( psz_sdp - p_buffer ) );
671 if( i_decompressed_size > 0 && i_decompressed_size < MAX_SAP_BUFFER )
673 memcpy( psz_sdp, p_decompressed_buffer, i_decompressed_size );
674 psz_sdp[i_decompressed_size] = '\0';
675 free( p_decompressed_buffer );
678 msg_Warn( p_sd, "Ignoring compressed sap packet" );
683 /* Add the size of authentification info */
684 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
686 msg_Warn( p_sd, "too short SAP packet\n");
689 psz_sdp += p_buffer[1];
692 /* Skip payload type */
693 /* Handle announces without \0 between SAP and SDP */
694 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
696 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
698 msg_Warn( p_sd, "empty SDP ?");
703 if( *psz_sdp == '\0' )
707 if( psz_sdp != psz_foo && strcasecmp( psz_foo, "application/sdp" ) )
709 msg_Dbg( p_sd, "unhandled content type: %s", psz_foo );
711 if( psz_sdp -p_buffer >= i_read )
713 msg_Warn( p_sd, "package without content" );
718 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
725 /* Decide whether we should add a playlist item for this SDP */
726 /* Parse connection information (c= & m= ) */
727 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
729 p_sdp->psz_uri = NULL;
732 /* Multi-media or no-parse -> pass to LIVE.COM */
733 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
734 p_sdp->i_media_type != 32 &&
735 p_sdp->i_media_type != 33) ||
736 p_sd->p_sys->b_parse == VLC_FALSE )
738 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
739 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
742 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
744 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
747 /* FIXME: we create a new announce each time the sdp changes */
748 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
752 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
757 p_sd->p_sys->pp_announces[i]->i_last = mdate();
764 if( p_sdp->i_media > 1 )
766 msg_Dbg( p_sd, "passing to LIVE.COM" );
769 CreateAnnounce( p_sd, i_hash, p_sdp );
774 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
777 playlist_item_t *p_item, *p_child;
779 sap_announce_t *p_sap = (sap_announce_t *)malloc(
780 sizeof(sap_announce_t ) );
782 psz_value = convert_from_utf8( p_sd, p_sdp->psz_sessionname );
783 if( p_sap == NULL || psz_value == NULL )
789 p_sap->i_last = mdate();
790 p_sap->i_hash = i_hash;
791 p_sap->p_sdp = p_sdp;
792 p_sap->i_item_id = -1;
794 /* Create the playlist item here */
795 p_item = playlist_ItemNew( p_sd, p_sap->p_sdp->psz_uri, psz_value );
804 psz_value = GetAttribute( p_sap->p_sdp, "tool" );
805 if( psz_value != NULL )
807 vlc_input_item_AddInfo( &p_item->input, _("Session"),
808 _("Tool"), psz_value );
810 if( strcmp( p_sdp->psz_username, "-" ) )
812 vlc_input_item_AddInfo( &p_item->input, _("Session"),
813 _("User"), p_sdp->psz_username );
816 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
818 if( psz_value == NULL )
820 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
823 if( psz_value != NULL )
825 char *psz_grp = convert_from_utf8( p_sd, psz_value );
827 if( psz_grp != NULL )
829 p_child = playlist_ChildSearchName( p_sd->p_sys->p_node,
832 if( p_child == NULL )
834 p_child = playlist_NodeCreate( p_sd->p_sys->p_playlist,
835 VIEW_CATEGORY, psz_grp,
836 p_sd->p_sys->p_node );
837 p_child->i_flags =~ PLAYLIST_SKIP_FLAG;
843 msg_Err( p_sd, "out of memory");
850 p_child = p_sd->p_sys->p_node;
853 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
854 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
856 playlist_NodeAddItem( p_sd->p_sys->p_playlist, p_item, VIEW_CATEGORY,
857 p_child, PLAYLIST_APPEND, PLAYLIST_END );
859 p_sap->i_item_id = p_item->input.i_id;
861 TAB_APPEND( p_sd->p_sys->i_announces,
862 p_sd->p_sys->pp_announces, p_sap );
867 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
871 for( i = 0 ; i< p_sdp->i_attributes; i++ )
873 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
874 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
876 return p_sdp->pp_attributes[i]->psz_value;
883 /* Fill p_sdp->psz_uri */
884 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
888 char *psz_uri = NULL;
889 char *psz_proto = NULL;
893 if( p_sdp->psz_connection )
895 psz_parse = p_sdp->psz_connection;
897 psz_eof = strchr( psz_parse, ' ' );
902 psz_parse = psz_eof + 1;
906 msg_Warn( p_obj, "unable to parse c field (1)");
910 psz_eof = strchr( psz_parse, ' ' );
915 if( !strncmp( psz_parse, "IP4", 3 ) )
919 else if( !strncmp( psz_parse, "IP6", 3 ) )
927 psz_parse = psz_eof + 1;
931 msg_Warn( p_obj, "unable to parse c field (2)");
935 psz_eof = strchr( psz_parse, '/' );
943 msg_Dbg( p_obj, "incorrect c field, %s", p_sdp->psz_connection );
945 psz_uri = strdup( psz_parse );
950 if( p_sdp->psz_media )
952 psz_parse = p_sdp->psz_media;
954 psz_eof = strchr( psz_parse, ' ' );
960 if( strncmp( psz_parse, "audio", 5 ) &&
961 strncmp( psz_parse, "video",5 ) )
963 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
968 psz_parse = psz_eof + 1;
972 msg_Warn( p_obj, "unable to parse m field (1)");
977 psz_eof = strchr( psz_parse, ' ' );
983 /* FIXME : multiple port ! */
984 i_port = atoi( psz_parse );
986 if( i_port <= 0 || i_port >= 65536 )
988 msg_Warn( p_obj, "invalid transport port %i", i_port );
991 psz_parse = psz_eof + 1;
995 msg_Warn( p_obj, "unable to parse m field (2)");
1000 psz_eof = strchr( psz_parse, ' ' );
1005 psz_proto = strdup( psz_parse );
1007 psz_parse = psz_eof + 1;
1008 p_sdp->i_media_type = atoi( psz_parse );
1013 msg_Dbg( p_obj, "incorrect m field, %s", p_sdp->psz_media );
1014 p_sdp->i_media_type = 33;
1015 psz_proto = strdup( psz_parse );
1019 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
1022 psz_proto = strdup( "rtp" );
1024 if( psz_proto && !strncasecmp( psz_proto, "UDP", 3 ) )
1027 psz_proto = strdup( "udp" );
1030 /* FIXME: HTTP support */
1037 if( net_AddressIsMulticast( p_obj, 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;
1060 if( psz_sdp == NULL )
1065 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1067 msg_Warn( p_obj, "Bad packet" );
1071 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1075 p_sdp->psz_sdp = strdup( psz_sdp );
1076 if( p_sdp->psz_sdp == NULL )
1082 p_sdp->psz_sessionname = NULL;
1083 p_sdp->psz_media = NULL;
1084 p_sdp->psz_connection = NULL;
1085 p_sdp->psz_uri = NULL;
1086 p_sdp->psz_address = NULL;
1087 p_sdp->psz_address_type= NULL;
1090 p_sdp->i_attributes = 0;
1091 p_sdp->pp_attributes = NULL;
1093 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1100 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1101 *psz_sdp == ' ' || *psz_sdp == '\t' )
1106 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1108 psz_eol = psz_sdp + strlen( psz_sdp );
1111 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1116 if( psz_eol <= psz_sdp )
1122 /* no space allowed between fields */
1123 if( psz_sdp[1] != '=' )
1125 msg_Warn( p_obj, "invalid packet" ) ;
1130 /* Now parse each line */
1131 switch( psz_sdp[0] )
1136 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1141 /* o field is <username> <session id> <version>
1142 * <network type> <address type> <address> */
1144 #define GET_FIELD( store ) \
1145 psz_eof = strchr( psz_parse, ' ' ); \
1148 *psz_eof=0; store = strdup( psz_parse ); \
1152 if( i_field != 5 ) \
1154 b_invalid = VLC_TRUE; break; \
1158 store = strdup( psz_parse ); \
1161 psz_parse = psz_eof + 1; i_field++;
1164 psz_parse = &psz_sdp[2];
1165 GET_FIELD( p_sdp->psz_username );
1166 GET_FIELD( psz_sess_id );
1168 p_sdp->i_session_id = atoll( psz_sess_id );
1170 FREE( psz_sess_id );
1172 GET_FIELD( psz_sess_id );
1173 FREE( psz_sess_id );
1175 GET_FIELD( p_sdp->psz_network_type );
1176 GET_FIELD( p_sdp->psz_address_type );
1177 GET_FIELD( p_sdp->psz_address );
1188 case( 'a' ): /* attribute */
1190 char *psz_eon = strchr( &psz_sdp[2], ':' );
1191 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1193 /* Attribute with value */
1198 p_attr->psz_field = strdup( &psz_sdp[2] );
1199 p_attr->psz_value = strdup( psz_eon );
1201 else /* Attribute without value */
1203 p_attr->psz_field = strdup( &psz_sdp[2] );
1204 p_attr->psz_value = NULL;
1207 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1211 case( 'm' ): /* Media announcement */
1213 /* If we have several medias, we pass the announcement to
1214 * LIVE.COM, so just count them */
1216 if( p_sdp->i_media == 1 )
1218 p_sdp->psz_media = strdup( &psz_sdp[2] );
1225 if( p_sdp->i_media > 1 )
1228 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1249 static char *convert_from_utf8( struct services_discovery_t *p_sd,
1252 char *psz_local, *psz_in, *psz_out;
1253 size_t ret, i_in, i_out;
1254 vlc_bool_t b_warn = VLC_FALSE;
1256 if( psz_unicode == NULL )
1259 psz_in = psz_unicode;
1260 i_in = strlen( psz_unicode );
1265 i_out = MB_CUR_MAX * i_in;
1267 psz_local = malloc( i_out + 1 );
1268 if( psz_local == NULL )
1270 psz_out = psz_local;
1274 ret = vlc_iconv( p_sd->p_sys->iconvHandle,
1275 &psz_in, &i_in, &psz_out, &i_out);
1282 if( ret == (size_t)(-1) )
1284 msg_Err( p_sd, "character conversion failure : %s",
1285 strerror( errno ) );
1293 msg_Warn( p_sd, "in \"%s\" : %s", psz_unicode,
1294 strerror( errno ) );
1300 static int InitSocket( services_discovery_t *p_sd, char *psz_address,
1303 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, "", 0 );
1307 net_StopSend( i_fd );
1308 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1309 p_sd->p_sys->i_fd, i_fd );
1313 return VLC_EGENERIC;
1317 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1319 int i_result, i_dstsize, n;
1320 unsigned char *psz_dst;
1323 d_stream.zalloc = (alloc_func)0;
1324 d_stream.zfree = (free_func)0;
1325 d_stream.opaque = (voidpf)0;
1327 i_result = inflateInit(&d_stream);
1328 if( i_result != Z_OK )
1330 printf( "inflateInit() failed. Result: %d\n", i_result );
1334 p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
1335 i_position = p_playlist->i_index;
1337 /* Gather the complete sdp file */
1340 int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp], i_sdp_max - i_sdp - 1 );
1342 d_stream.next_in = (Bytef *)psz_src;
1343 d_stream.avail_in = i_len;
1351 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1352 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1353 d_stream.avail_out = 1000;
1355 i_result = inflate(&d_stream, Z_NO_FLUSH);
1356 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1358 printf( "Zlib decompression failed. Result: %d\n", i_result );
1362 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1363 ( i_result != Z_STREAM_END ) );
1365 i_dstsize = d_stream.total_out;
1366 inflateEnd( &d_stream );
1368 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1375 static void FreeSDP( sdp_t *p_sdp )
1378 FREE( p_sdp->psz_sdp );
1379 FREE( p_sdp->psz_sessionname );
1380 FREE( p_sdp->psz_connection );
1381 FREE( p_sdp->psz_media );
1382 FREE( p_sdp->psz_uri );
1383 FREE( p_sdp->psz_username );
1384 FREE( p_sdp->psz_network_type );
1386 FREE( p_sdp->psz_address );
1387 FREE( p_sdp->psz_address_type );
1389 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1391 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1392 FREE( p_sdp->pp_attributes[i]->psz_field );
1393 FREE( p_sdp->pp_attributes[i]->psz_value );
1394 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1400 static int RemoveAnnounce( services_discovery_t *p_sd,
1401 sap_announce_t *p_announce )
1405 if( p_announce->p_sdp ) FreeSDP( p_announce->p_sdp );
1407 if( p_announce->i_item_id > -1 )
1409 playlist_LockDelete( p_sd->p_sys->p_playlist, p_announce->i_item_id );
1412 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1414 if( p_sd->p_sys->pp_announces[i] == p_announce )
1416 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1427 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1429 /* A session is identified by
1430 * username, session_id, network type, address type and address */
1431 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1432 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1433 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1434 p_sdp1->psz_address && p_sdp2->psz_address )
1436 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1437 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1438 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1439 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1440 p_sdp1->i_session_id == p_sdp2->i_session_id )
1456 static void CacheLoad( services_discovery_t *p_sd )
1458 msg_Warn( p_sd, "Cache not implemented") ;
1461 static void CacheSave( services_discovery_t *p_sd )
1463 msg_Warn( p_sd, "Cache not implemented") ;