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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, 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_( "The SAP module normally chooses itself the " \
81 "right addresses to listen to. However, you " \
82 "can specify a specific address." )
83 #define SAP_IPV4_TEXT N_( "IPv4 SAP" )
84 #define SAP_IPV4_LONGTEXT N_( \
85 "Listen to IPv4 announcements " \
86 "on the standard address." )
87 #define SAP_IPV6_TEXT N_( "IPv6 SAP" )
88 #define SAP_IPV6_LONGTEXT N_( \
89 "Listen to IPv6 announcements " \
90 "on the standard addresses." )
91 #define SAP_SCOPE_TEXT N_( "IPv6 SAP scope" )
92 #define SAP_SCOPE_LONGTEXT N_( \
93 "Scope for IPv6 announcements (default is 8)." )
94 #define SAP_TIMEOUT_TEXT N_( "SAP timeout (seconds)" )
95 #define SAP_TIMEOUT_LONGTEXT N_( \
96 "Delay after which SAP items get deleted if no new announcement " \
98 #define SAP_PARSE_TEXT N_( "Try to parse the announce" )
99 #define SAP_PARSE_LONGTEXT N_( \
100 "This enables actual parsing of the announces by the SAP module. " \
101 "Otherwise, all announcements are parsed by the \"livedotcom\" " \
102 "(RTP/RTSP) module." )
103 #define SAP_STRICT_TEXT N_( "SAP Strict mode" )
104 #define SAP_STRICT_LONGTEXT N_( \
105 "When this is set, the SAP parser will discard some non-compliant " \
107 #define SAP_CACHE_TEXT N_("Use SAP cache")
108 #define SAP_CACHE_LONGTEXT N_( \
109 "This enables a SAP caching mechanism. " \
110 "This will result in lower SAP startup time, but you could end up " \
111 "with items corresponding to legacy streams." )
112 #define SAP_TIMESHIFT_TEXT N_("Allow timeshifting")
113 #define SAP_TIMESHIFT_LONGTEXT N_( "This automatically enables timeshifting " \
114 "for streams discovered through SAP announcements." )
117 static int Open ( vlc_object_t * );
118 static void Close( vlc_object_t * );
119 static int OpenDemux ( vlc_object_t * );
120 static void CloseDemux ( vlc_object_t * );
123 set_shortname( _("SAP"));
124 set_description( _("SAP Announcements") );
125 set_category( CAT_PLAYLIST );
126 set_subcategory( SUBCAT_PLAYLIST_SD );
128 add_string( "sap-addr", NULL, NULL,
129 SAP_ADDR_TEXT, SAP_ADDR_LONGTEXT, VLC_TRUE );
130 add_bool( "sap-ipv4", 1 , NULL,
131 SAP_IPV4_TEXT,SAP_IPV4_LONGTEXT, VLC_TRUE );
132 add_bool( "sap-ipv6", 1 , NULL,
133 SAP_IPV6_TEXT, SAP_IPV6_LONGTEXT, VLC_TRUE );
134 add_integer( "sap-timeout", 1800, NULL,
135 SAP_TIMEOUT_TEXT, SAP_TIMEOUT_LONGTEXT, VLC_TRUE );
136 add_bool( "sap-parse", 1 , NULL,
137 SAP_PARSE_TEXT,SAP_PARSE_LONGTEXT, VLC_TRUE );
138 add_bool( "sap-strict", 0 , NULL,
139 SAP_STRICT_TEXT,SAP_STRICT_LONGTEXT, VLC_TRUE );
141 add_bool( "sap-cache", 0 , NULL,
142 SAP_CACHE_TEXT,SAP_CACHE_LONGTEXT, VLC_TRUE );
144 add_bool( "sap-timeshift", 0 , NULL,
145 SAP_TIMESHIFT_TEXT,SAP_TIMESHIFT_LONGTEXT, VLC_TRUE );
147 set_capability( "services_discovery", 0 );
148 set_callbacks( Open, Close );
151 set_description( _("SDP file parser for UDP") );
152 add_shortcut( "sdp" );
153 set_capability( "demux2", 51 );
154 set_callbacks( OpenDemux, CloseDemux );
158 /*****************************************************************************
160 *****************************************************************************/
162 typedef struct sdp_t sdp_t;
163 typedef struct attribute_t attribute_t;
164 typedef struct sap_announce_t sap_announce_t;
166 /* The structure that contains sdp information */
172 char *psz_sessionname;
174 /* Raw m= and c= fields */
175 char *psz_connection;
180 char *psz_network_type;
181 char *psz_address_type;
183 int64_t i_session_id;
188 int i_in; /* IP version */
194 attribute_t **pp_attributes;
203 struct sap_announce_t
208 uint32_t i_source[4];
210 /* SAP annnounces must only contain one SDP */
218 struct services_discovery_sys_t
220 /* Socket descriptors */
225 playlist_item_t *p_node_cat;
226 playlist_item_t *p_node_one;
227 playlist_t *p_playlist;
229 /* Table of announces */
231 struct sap_announce_t **pp_announces;
236 vlc_bool_t b_timeshift;
246 /*****************************************************************************
248 *****************************************************************************/
252 static int Demux( demux_t *p_demux );
253 static int Control( demux_t *, int, va_list );
254 static void Run ( services_discovery_t *p_sd );
256 /* Main parsing functions */
257 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp );
258 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read );
259 static sdp_t * ParseSDP( vlc_object_t *p_sd, char* psz_sdp );
260 static sap_announce_t *CreateAnnounce( services_discovery_t *, uint16_t, sdp_t * );
261 static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
264 static void CacheLoad( services_discovery_t *p_sd );
265 static void CacheSave( services_discovery_t *p_sd );
266 /* Helper functions */
267 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
268 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
269 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port );
271 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len );
273 static void FreeSDP( sdp_t *p_sdp );
277 if( p ) { free( p ); (p) = NULL; }
278 /*****************************************************************************
279 * Open: initialize and create stuff
280 *****************************************************************************/
281 static int Open( vlc_object_t *p_this )
283 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
284 services_discovery_sys_t *p_sys = (services_discovery_sys_t *)
285 malloc( sizeof( services_discovery_sys_t ) );
287 playlist_view_t *p_view;
290 p_sys->i_timeout = var_CreateGetInteger( p_sd, "sap-timeout" );
298 p_sys->b_strict = var_CreateGetInteger( p_sd, "sap-strict");
299 p_sys->b_parse = var_CreateGetInteger( p_sd, "sap-parse" );
302 if( var_CreateGetInteger( p_sd, "sap-cache" ) )
308 /* Cache sap_timeshift value */
309 p_sys->b_timeshift = var_CreateGetInteger( p_sd, "sap-timeshift" )
310 ? VLC_TRUE : VLC_FALSE;
312 /* Create our playlist node */
313 p_sys->p_playlist = (playlist_t *)vlc_object_find( p_sd,
316 if( !p_sys->p_playlist )
318 msg_Warn( p_sd, "unable to find playlist, cancelling SAP listening");
322 playlist_NodesCreateForSD( p_sys->p_playlist, _("SAP sessions"),
323 &p_sys->p_node_cat, &p_sys->p_node_one );
325 p_sys->i_announces = 0;
326 p_sys->pp_announces = NULL;
331 /*****************************************************************************
332 * OpenDemux: initialize and create stuff
333 *****************************************************************************/
334 static int OpenDemux( vlc_object_t *p_this )
336 demux_t *p_demux = (demux_t *)p_this;
338 int i_max_sdp = 1024;
340 char *psz_sdp = NULL;
343 if( !var_CreateGetInteger( p_demux, "sap-parse" ) )
345 /* We want livedotcom module to parse this SDP file */
352 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
354 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
355 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
356 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
362 psz_sdp = (char *)malloc( i_max_sdp );
363 if( !psz_sdp ) return VLC_EGENERIC;
365 /* Gather the complete sdp file */
368 int i_read = stream_Read( p_demux->s,
369 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
373 msg_Err( p_demux, "failed to read SDP" );
379 if( i_read < i_max_sdp - i_sdp - 1 )
381 psz_sdp[i_sdp] = '\0';
386 psz_sdp = (char *)realloc( psz_sdp, i_max_sdp );
389 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
393 msg_Warn( p_demux, "invalid SDP");
397 if( p_sdp->i_media > 1 )
402 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
404 p_sdp->psz_uri = NULL;
406 if( p_sdp->i_media_type != 33 && p_sdp->i_media_type != 32 &&
407 p_sdp->i_media_type != 14 )
410 if( p_sdp->psz_uri == NULL ) goto error;
412 p_demux->p_sys = (demux_sys_t *)malloc( sizeof(demux_sys_t) );
413 p_demux->p_sys->p_sdp = p_sdp;
414 p_demux->pf_control = Control;
415 p_demux->pf_demux = Demux;
422 if( p_sdp ) FreeSDP( p_sdp );
423 stream_Seek( p_demux->s, 0 );
427 /*****************************************************************************
429 *****************************************************************************/
430 static void Close( vlc_object_t *p_this )
432 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
433 services_discovery_sys_t *p_sys = p_sd->p_sys;
437 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
439 net_Close( p_sys->pi_fd[i] );
441 FREE( p_sys->pi_fd );
444 if( config_GetInt( p_sd, "sap-cache" ) )
450 for( i = p_sys->i_announces - 1; i>= 0; i-- )
452 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
454 FREE( p_sys->pp_announces );
456 if( p_sys->p_playlist )
458 playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node_cat, VLC_TRUE,
460 playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node_one, VLC_TRUE,
462 vlc_object_release( p_sys->p_playlist );
468 /*****************************************************************************
469 * CloseDemux: Close the demuxer
470 *****************************************************************************/
471 static void CloseDemux( vlc_object_t *p_this )
473 demux_t *p_demux = (demux_t *)p_this;
476 if( p_demux->p_sys->p_sdp ) FreeSDP( p_demux->p_sys->p_sdp );
477 free( p_demux->p_sys );
481 /*****************************************************************************
482 * Run: main SAP thread
483 *****************************************************************************
484 * Listens to SAP packets, and sends them to packet_handle
485 *****************************************************************************/
486 #define MAX_SAP_BUFFER 5000
488 static void Run( services_discovery_t *p_sd )
493 /* Braindead Winsock DNS resolver will get stuck over 2 seconds per failed
494 * DNS queries, even if the DNS server returns an error with milliseconds.
495 * You don't want to know why the bug (as of XP SP2) wasn't fixed since
496 * Winsock 1.1 from Windows 95, if not Windows 3.1.
497 * Anyway, to avoid a 30 seconds delay for failed IPv6 socket creation,
498 * we have to open sockets in Run() rather than Open(). */
499 if( var_CreateGetInteger( p_sd, "sap-ipv4" ) )
501 InitSocket( p_sd, SAP_V4_GLOBAL_ADDRESS, SAP_PORT );
502 InitSocket( p_sd, SAP_V4_ORG_ADDRESS, SAP_PORT );
503 InitSocket( p_sd, SAP_V4_LOCAL_ADDRESS, SAP_PORT );
504 InitSocket( p_sd, SAP_V4_LINK_ADDRESS, SAP_PORT );
506 if( var_CreateGetInteger( p_sd, "sap-ipv6" ) )
508 char psz_address[] = SAP_V6_1"0"SAP_V6_2;
511 for( c_scope = ipv6_scopes; *c_scope; c_scope++ )
513 psz_address[sizeof(SAP_V6_1) - 1] = *c_scope;
514 InitSocket( p_sd, psz_address, SAP_PORT );
518 psz_addr = var_CreateGetString( p_sd, "sap-addr" );
519 if( psz_addr && *psz_addr )
521 InitSocket( p_sd, psz_addr, SAP_PORT );
525 if( p_sd->p_sys->i_fd == 0 )
527 msg_Err( p_sd, "unable to listen on any address" );
531 /* read SAP packets */
532 while( !p_sd->b_die )
535 uint8_t p_buffer[MAX_SAP_BUFFER+1];
537 i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
538 p_sd->p_sys->i_fd, p_buffer,
539 MAX_SAP_BUFFER, 500000 );
541 /* Check for items that need deletion */
542 for( i = 0; i < p_sd->p_sys->i_announces; i++ )
544 mtime_t i_timeout = ( mtime_t ) 1000000 * p_sd->p_sys->i_timeout;
546 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
548 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i] );
552 /* Minimum length is > 6 */
557 msg_Warn( p_sd, "socket read error" );
562 p_buffer[i_read] = '\0';
564 /* Parse the packet */
565 ParseSAP( p_sd, p_buffer, i_read );
569 /**********************************************************************
570 * Demux: reads and demuxes data packets
571 * Return -1 if error, 0 if EOF, 1 else
572 **********************************************************************/
573 static int Demux( demux_t *p_demux )
575 sdp_t *p_sdp = p_demux->p_sys->p_sdp;
576 playlist_t *p_playlist;
578 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
581 /* TODO FIXME !! Add at the correct place */
582 playlist_PlaylistAdd( p_playlist, p_sdp->psz_uri, p_sdp->psz_sessionname,
583 PLAYLIST_APPEND, PLAYLIST_END );
585 vlc_object_release( p_playlist );
586 if( p_sdp ) FreeSDP( p_sdp );
591 static int Control( demux_t *p_demux, int i_query, va_list args )
596 /**************************************************************
598 **************************************************************/
600 /* i_read is at least > 6 */
601 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
603 int i_version, i_address_type, i_hash, i;
604 char *psz_sdp, *psz_foo, *psz_initial_sdp;
606 vlc_bool_t b_compressed;
607 vlc_bool_t b_need_delete = VLC_FALSE;
609 /* First, check the sap announce is correct */
610 i_version = p_buffer[0] >> 5;
613 msg_Dbg( p_sd, "strange sap version %d found", i_version );
616 i_address_type = p_buffer[0] & 0x10;
618 if( (p_buffer[0] & 0x08) != 0 )
620 msg_Dbg( p_sd, "reserved bit incorrectly set" );
624 if( (p_buffer[0] & 0x04) != 0 )
626 msg_Dbg( p_sd, "session deletion packet" );
627 b_need_delete = VLC_TRUE;
630 if( p_buffer[0] & 0x02 )
632 msg_Dbg( p_sd, "encrypted packet, unsupported" );
636 b_compressed = p_buffer[0] & 0x01;
638 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
640 if( p_sd->p_sys->b_strict && i_hash == 0 )
642 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
646 psz_sdp = (char *)p_buffer + 4;
647 psz_initial_sdp = psz_sdp;
649 if( i_address_type == 0 ) /* ipv4 source address */
654 msg_Warn( p_sd, "too short SAP packet" );
658 else /* ipv6 source address */
663 msg_Warn( p_sd, "too short SAP packet" );
671 uint8_t *p_decompressed_buffer = NULL;
672 int i_decompressed_size;
674 i_decompressed_size = Decompress( (uint8_t *)psz_sdp,
675 &p_decompressed_buffer, i_read - ( psz_sdp - (char *)p_buffer ) );
676 if( i_decompressed_size > 0 && i_decompressed_size < MAX_SAP_BUFFER )
678 memcpy( psz_sdp, p_decompressed_buffer, i_decompressed_size );
679 psz_sdp[i_decompressed_size] = '\0';
680 free( p_decompressed_buffer );
683 msg_Warn( p_sd, "ignoring compressed sap packet" );
688 /* Add the size of authentification info */
689 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
691 msg_Warn( p_sd, "too short SAP packet\n");
694 psz_sdp += p_buffer[1];
697 /* Skip payload type */
698 /* Handle announces without \0 between SAP and SDP */
699 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
701 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
703 msg_Warn( p_sd, "empty SDP ?");
708 if( *psz_sdp == '\0' )
712 if( ( psz_sdp != psz_foo ) && strcasecmp( psz_foo, "application/sdp" ) )
714 msg_Dbg( p_sd, "unhandled content type: %s", psz_foo );
716 if( ( psz_sdp - (char *)p_buffer ) >= i_read )
718 msg_Warn( p_sd, "package without content" );
723 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
730 /* Decide whether we should add a playlist item for this SDP */
731 /* Parse connection information (c= & m= ) */
732 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
734 p_sdp->psz_uri = NULL;
737 /* Multi-media or no-parse -> pass to LIVE.COM */
738 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
739 p_sdp->i_media_type != 32 &&
740 p_sdp->i_media_type != 33) ||
741 p_sd->p_sys->b_parse == VLC_FALSE )
743 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
744 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
747 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
749 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
752 /* FIXME: we create a new announce each time the sdp changes */
753 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
757 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
761 p_sd->p_sys->pp_announces[i]->i_last = mdate();
768 if( p_sdp->i_media > 1 )
770 msg_Dbg( p_sd, "passing to liveMedia" );
773 CreateAnnounce( p_sd, i_hash, p_sdp );
778 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
781 input_item_t *p_input;
782 playlist_item_t *p_item, *p_child;
784 sap_announce_t *p_sap = (sap_announce_t *)malloc(
785 sizeof(sap_announce_t ) );
786 services_discovery_sys_t *p_sys;
792 EnsureUTF8( p_sdp->psz_sessionname );
793 p_sap->i_last = mdate();
794 p_sap->i_hash = i_hash;
795 p_sap->p_sdp = p_sdp;
797 /* Create the actual playlist item here */
798 p_input = input_ItemNewWithType( VLC_OBJECT(p_sd),
799 p_sap->p_sdp->psz_uri,
800 p_sdp->psz_sessionname,
801 0, NULL, -1, ITEM_TYPE_NET );
802 p_sap->i_input_id = p_input->i_id;
809 if( p_sys->b_timeshift )
810 vlc_input_item_AddOption( p_input, ":access-filter=timeshift" );
812 psz_value = GetAttribute( p_sap->p_sdp, "tool" );
813 if( psz_value != NULL )
815 vlc_input_item_AddInfo( p_input, _("Session"),_("Tool"), psz_value );
817 if( strcmp( p_sdp->psz_username, "-" ) )
819 vlc_input_item_AddInfo( p_input, _("Session"),
820 _("User"), p_sdp->psz_username );
824 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
825 if( psz_value == NULL )
826 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
828 if( psz_value != NULL )
830 EnsureUTF8( psz_value );
832 p_child = playlist_ChildSearchName( p_sys->p_node_cat, psz_value );
834 if( p_child == NULL )
836 p_child = playlist_NodeCreate( p_sys->p_playlist, psz_value,
838 p_child->i_flags &= ~PLAYLIST_SKIP_FLAG;
843 p_child = p_sys->p_node_cat;
846 p_item = playlist_NodeAddInput( p_sys->p_playlist, p_input, p_child,
847 PLAYLIST_APPEND, PLAYLIST_END );
848 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
849 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
850 p_sap->i_item_id_cat = p_item->i_id;
852 p_item = playlist_NodeAddInput( p_sys->p_playlist, p_input,
853 p_sys->p_node_one, PLAYLIST_APPEND, PLAYLIST_END );
854 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
855 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
856 p_sap->i_item_id_one = p_item->i_id;
858 TAB_APPEND( p_sys->i_announces, p_sys->pp_announces, p_sap );
863 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
867 for( i = 0 ; i< p_sdp->i_attributes; i++ )
869 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
870 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
872 return p_sdp->pp_attributes[i]->psz_value;
879 /* Fill p_sdp->psz_uri */
880 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
884 char *psz_uri = NULL;
885 char *psz_proto = NULL;
886 char psz_source[256];
890 if( p_sdp->psz_connection )
892 psz_parse = p_sdp->psz_connection;
894 psz_eof = strchr( psz_parse, ' ' );
899 psz_parse = psz_eof + 1;
903 msg_Warn( p_obj, "unable to parse c field (1)");
907 psz_eof = strchr( psz_parse, ' ' );
912 if( !strncmp( psz_parse, "IP4", 3 ) )
916 else if( !strncmp( psz_parse, "IP6", 3 ) )
924 psz_parse = psz_eof + 1;
928 msg_Warn( p_obj, "unable to parse c field (2)");
932 psz_eof = strchr( psz_parse, '/' );
940 msg_Dbg( p_obj, "incorrect c field, %s", p_sdp->psz_connection );
942 if( p_sdp->i_in == 6 && ( isxdigit( *psz_parse ) || *psz_parse == ':' ) )
944 asprintf( &psz_uri, "[%s]", psz_parse );
946 else psz_uri = strdup( psz_parse );
951 if( p_sdp->psz_media )
953 psz_parse = p_sdp->psz_media;
955 psz_eof = strchr( psz_parse, ' ' );
961 if( strncmp( psz_parse, "audio", 5 ) &&
962 strncmp( psz_parse, "video", 5 ) )
964 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
969 psz_parse = psz_eof + 1;
973 msg_Warn( p_obj, "unable to parse m field (1)");
978 psz_eof = strchr( psz_parse, ' ' );
984 /* FIXME : multiple port ! */
985 i_port = atoi( psz_parse );
987 if( i_port <= 0 || i_port >= 65536 )
989 msg_Warn( p_obj, "invalid transport port %i", i_port );
992 psz_parse = psz_eof + 1;
996 msg_Warn( p_obj, "unable to parse m field (2)");
1001 psz_eof = strchr( psz_parse, ' ' );
1006 psz_proto = strdup( psz_parse );
1008 psz_parse = psz_eof + 1;
1009 p_sdp->i_media_type = atoi( psz_parse );
1014 msg_Dbg( p_obj, "incorrect m field, %s", p_sdp->psz_media );
1015 p_sdp->i_media_type = 33;
1016 psz_proto = strdup( psz_parse );
1020 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
1023 psz_proto = strdup( "rtp" );
1025 if( psz_proto && !strncasecmp( psz_proto, "UDP", 3 ) )
1028 psz_proto = strdup( "udp" );
1031 /* FIXME: HTTP support */
1038 /* handle SSM case */
1039 psz_parse = GetAttribute( p_sdp, "source-filter" );
1040 psz_source[0] = '\0';
1042 if( psz_parse ) sscanf( psz_parse, " incl IN IP%*s %*s %255s ", psz_source);
1044 asprintf( &p_sdp->psz_uri, "%s://%s@%s:%i", psz_proto, psz_source,
1052 /***********************************************************************
1053 * ParseSDP : SDP parsing
1054 * *********************************************************************
1055 * Validate SDP and parse all fields
1056 ***********************************************************************/
1057 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1060 vlc_bool_t b_invalid = VLC_FALSE;
1061 vlc_bool_t b_end = VLC_FALSE;
1062 if( psz_sdp == NULL )
1067 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1069 msg_Warn( p_obj, "bad packet" );
1073 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1077 p_sdp->psz_sdp = strdup( psz_sdp );
1078 if( p_sdp->psz_sdp == NULL )
1084 p_sdp->psz_sessionname = NULL;
1085 p_sdp->psz_media = NULL;
1086 p_sdp->psz_connection = NULL;
1087 p_sdp->psz_uri = NULL;
1088 p_sdp->psz_address = NULL;
1089 p_sdp->psz_address_type= NULL;
1092 p_sdp->i_attributes = 0;
1093 p_sdp->pp_attributes = NULL;
1095 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1102 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1103 *psz_sdp == ' ' || *psz_sdp == '\t' )
1108 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1110 psz_eol = psz_sdp + strlen( psz_sdp );
1113 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1118 if( psz_eol <= psz_sdp )
1124 /* no space allowed between fields */
1125 if( psz_sdp[1] != '=' )
1127 msg_Warn( p_obj, "invalid packet" ) ;
1132 /* Now parse each line */
1133 switch( psz_sdp[0] )
1138 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1143 /* o field is <username> <session id> <version>
1144 * <network type> <address type> <address> */
1146 #define GET_FIELD( store ) \
1147 psz_eof = strchr( psz_parse, ' ' ); \
1150 *psz_eof=0; store = strdup( psz_parse ); \
1154 if( i_field != 5 ) \
1156 b_invalid = VLC_TRUE; break; \
1160 store = strdup( psz_parse ); \
1163 psz_parse = psz_eof + 1; i_field++;
1166 psz_parse = &psz_sdp[2];
1167 GET_FIELD( p_sdp->psz_username );
1168 GET_FIELD( psz_sess_id );
1170 p_sdp->i_session_id = atoll( psz_sess_id );
1172 FREE( psz_sess_id );
1174 GET_FIELD( psz_sess_id );
1175 FREE( psz_sess_id );
1177 GET_FIELD( p_sdp->psz_network_type );
1178 GET_FIELD( p_sdp->psz_address_type );
1179 GET_FIELD( p_sdp->psz_address );
1190 case( 'a' ): /* attribute */
1192 char *psz_eon = strchr( &psz_sdp[2], ':' );
1193 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1195 /* Attribute with value */
1200 p_attr->psz_field = strdup( &psz_sdp[2] );
1201 p_attr->psz_value = strdup( psz_eon );
1203 else /* Attribute without value */
1205 p_attr->psz_field = strdup( &psz_sdp[2] );
1206 p_attr->psz_value = NULL;
1209 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1213 case( 'm' ): /* Media announcement */
1215 /* If we have several medias, we pass the announcement to
1216 * LIVE.COM, so just count them */
1218 if( p_sdp->i_media == 1 )
1220 p_sdp->psz_media = strdup( &psz_sdp[2] );
1227 if( p_sdp->i_media > 1 )
1230 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1250 static int InitSocket( services_discovery_t *p_sd, char *psz_address,
1253 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, NULL, 0 );
1257 net_StopSend( i_fd );
1258 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1259 p_sd->p_sys->i_fd, i_fd );
1263 return VLC_EGENERIC;
1267 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1269 int i_result, i_dstsize, n;
1270 unsigned char *psz_dst;
1273 d_stream.zalloc = (alloc_func)0;
1274 d_stream.zfree = (free_func)0;
1275 d_stream.opaque = (voidpf)0;
1277 i_result = inflateInit(&d_stream);
1278 if( i_result != Z_OK )
1280 printf( "inflateInit() failed. Result: %d\n", i_result );
1283 d_stream.next_in = (Bytef *)psz_src;
1284 d_stream.avail_in = i_len;
1292 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1293 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1294 d_stream.avail_out = 1000;
1296 i_result = inflate(&d_stream, Z_NO_FLUSH);
1297 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1299 printf( "Zlib decompression failed. Result: %d\n", i_result );
1303 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1304 ( i_result != Z_STREAM_END ) );
1306 i_dstsize = d_stream.total_out;
1307 inflateEnd( &d_stream );
1309 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1316 static void FreeSDP( sdp_t *p_sdp )
1319 FREE( p_sdp->psz_sdp );
1320 FREE( p_sdp->psz_sessionname );
1321 FREE( p_sdp->psz_connection );
1322 FREE( p_sdp->psz_media );
1323 FREE( p_sdp->psz_uri );
1324 FREE( p_sdp->psz_username );
1325 FREE( p_sdp->psz_network_type );
1327 FREE( p_sdp->psz_address );
1328 FREE( p_sdp->psz_address_type );
1330 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1332 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1333 FREE( p_sdp->pp_attributes[i]->psz_field );
1334 FREE( p_sdp->pp_attributes[i]->psz_value );
1335 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1341 static int RemoveAnnounce( services_discovery_t *p_sd,
1342 sap_announce_t *p_announce )
1346 if( p_announce->p_sdp ) FreeSDP( p_announce->p_sdp );
1348 if( p_announce->i_input_id > -1 )
1350 playlist_LockDeleteAllFromInput(
1351 p_sd->p_sys->p_playlist, p_announce->i_input_id );
1354 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1356 if( p_sd->p_sys->pp_announces[i] == p_announce )
1358 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1369 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1371 /* A session is identified by
1372 * username, session_id, network type, address type and address */
1373 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1374 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1375 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1376 p_sdp1->psz_address && p_sdp2->psz_address )
1378 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1379 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1380 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1381 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1382 p_sdp1->i_session_id == p_sdp2->i_session_id )
1398 static void CacheLoad( services_discovery_t *p_sd )
1400 msg_Warn( p_sd, "cache not implemented") ;
1403 static void CacheSave( services_discovery_t *p_sd )
1405 msg_Warn( p_sd, "cache not implemented") ;