mirror of
https://code.videolan.org/videolan/vlc
synced 2024-09-08 11:26:59 +02:00
347 lines
11 KiB
C
347 lines
11 KiB
C
/*****************************************************************************
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* bonjour.c: Bonjour services discovery module
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*****************************************************************************
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* Copyright (C) 2005 the VideoLAN team
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* $Id$
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*
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* Authors: Jon Lech Johansen <jon@nanocrew.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Includes
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*****************************************************************************/
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#define _GNU_SOURCE
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#include <stdlib.h> /* malloc(), free() */
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#include <vlc/vlc.h>
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#include <vlc_playlist.h>
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#include <vlc_arrays.h>
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#include <avahi-client/client.h>
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#ifdef HAVE_AVAHI_06
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# include <avahi-client/publish.h>
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# include <avahi-client/lookup.h>
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#endif
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#include <avahi-common/simple-watch.h>
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#include <avahi-common/malloc.h>
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#include <avahi-common/error.h>
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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/* Callbacks */
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static int Open ( vlc_object_t * );
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static void Close( vlc_object_t * );
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vlc_module_begin();
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set_shortname( "Bonjour" );
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set_description( _("Bonjour services") );
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set_category( CAT_PLAYLIST );
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set_subcategory( SUBCAT_PLAYLIST_SD );
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set_capability( "services_discovery", 0 );
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set_callbacks( Open, Close );
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vlc_module_end();
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/*****************************************************************************
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* Local structures
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*****************************************************************************/
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struct services_discovery_sys_t
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{
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AvahiSimplePoll *simple_poll;
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AvahiClient *client;
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AvahiServiceBrowser *sb;
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vlc_dictionary_t services_name_to_input_item;
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};
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/*****************************************************************************
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* Local prototypes
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*****************************************************************************/
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/* Main functions */
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static void Run ( services_discovery_t *p_intf );
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/*****************************************************************************
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* client_callback
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*****************************************************************************/
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static void client_callback( AvahiClient *c, AvahiClientState state,
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void * userdata )
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{
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services_discovery_t *p_sd = ( services_discovery_t* )userdata;
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services_discovery_sys_t *p_sys = p_sd->p_sys;
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#ifdef HAVE_AVAHI_06
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if( state == AVAHI_CLIENT_FAILURE &&
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(avahi_client_errno(c) == AVAHI_ERR_DISCONNECTED) )
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#else
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if( state == AVAHI_CLIENT_DISCONNECTED )
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#endif
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{
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msg_Err( p_sd, "avahi client disconnected" );
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avahi_simple_poll_quit( p_sys->simple_poll );
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}
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}
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/*****************************************************************************
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* resolve_callback
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*****************************************************************************/
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static void resolve_callback(
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AvahiServiceResolver *r,
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AvahiIfIndex interface,
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AvahiProtocol protocol,
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AvahiResolverEvent event,
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const char *name,
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const char *type,
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const char *domain,
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const char *host_name,
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const AvahiAddress *address,
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uint16_t port,
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AvahiStringList *txt,
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#ifdef HAVE_AVAHI_06
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AvahiLookupResultFlags flags,
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#endif
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void* userdata )
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{
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services_discovery_t *p_sd = ( services_discovery_t* )userdata;
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services_discovery_sys_t *p_sys = p_sd->p_sys;
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#ifdef HAVE_AVAHI_06
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if( event == AVAHI_RESOLVER_FAILURE )
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#else
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if( event == AVAHI_RESOLVER_TIMEOUT )
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#endif
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{
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msg_Err( p_sd,
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"failed to resolve service '%s' of type '%s' in domain '%s'",
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name, type, domain );
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}
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else if( event == AVAHI_RESOLVER_FOUND )
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{
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char a[128];
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char *psz_uri = NULL;
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char *psz_addr = NULL;
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AvahiStringList *asl = NULL;
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input_item_t *p_input = NULL;
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msg_Dbg( p_sd, "service '%s' of type '%s' in domain '%s'",
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name, type, domain );
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avahi_address_snprint(a, (sizeof(a)/sizeof(a[0]))-1, address);
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if( protocol == AVAHI_PROTO_INET6 )
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asprintf( &psz_addr, "[%s]", a );
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if( txt != NULL )
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asl = avahi_string_list_find( txt, "path" );
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if( asl != NULL )
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{
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size_t size;
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char *key = NULL;
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char *value = NULL;
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if( avahi_string_list_get_pair( asl, &key, &value, &size ) == 0 &&
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value != NULL )
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{
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asprintf( &psz_uri, "http://%s:%d%s",
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psz_addr != NULL ? psz_addr : a, port, value );
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}
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if( key != NULL )
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avahi_free( (void *)key );
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if( value != NULL )
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avahi_free( (void *)value );
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}
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else
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{
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asprintf( &psz_uri, "http://%s:%d",
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psz_addr != NULL ? psz_addr : a, port );
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}
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if( psz_addr != NULL )
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free( (void *)psz_addr );
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if( psz_uri != NULL )
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{
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p_input = input_ItemNewExt( p_sd, psz_uri, name, 0, NULL, -1 );
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free( (void *)psz_uri );
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}
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if( p_input != NULL )
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{
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vlc_dictionary_insert( &p_sys->services_name_to_input_item,
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name, p_input );
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services_discovery_AddItem( p_sd, p_input, NULL /* no category */ );
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}
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}
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avahi_service_resolver_free( r );
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}
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/*****************************************************************************
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* browser_callback
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*****************************************************************************/
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static void browse_callback(
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AvahiServiceBrowser *b,
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AvahiIfIndex interface,
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AvahiProtocol protocol,
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AvahiBrowserEvent event,
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const char *name,
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const char *type,
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const char *domain,
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#ifdef HAVE_AVAHI_06
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AvahiLookupResultFlags flags,
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#endif
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void* userdata )
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{
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services_discovery_t *p_sd = ( services_discovery_t* )userdata;
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services_discovery_sys_t *p_sys = p_sd->p_sys;
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if( event == AVAHI_BROWSER_NEW )
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{
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if( avahi_service_resolver_new( p_sys->client, interface, protocol,
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name, type, domain, AVAHI_PROTO_UNSPEC,
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#ifdef HAVE_AVAHI_06
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0,
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#endif
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resolve_callback, userdata ) == NULL )
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{
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msg_Err( p_sd, "failed to resolve service '%s': %s", name,
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avahi_strerror( avahi_client_errno( p_sys->client ) ) );
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}
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}
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else
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{
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/** \todo Store the input id and search it, rather than searching the items */
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input_item_t *p_item;
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p_item = vlc_dictionary_value_for_key(
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&p_sys->services_name_to_input_item,
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name );
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if( !p_item )
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msg_Err( p_sd, "failed to find service '%s' in playlist", name );
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else
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{
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services_discovery_RemoveItem( p_sd, p_item );
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vlc_dictionary_remove_value_for_key(
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&p_sys->services_name_to_input_item,
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name );
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}
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}
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}
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/*****************************************************************************
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* Open: initialize and create stuff
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*****************************************************************************/
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static int Open( vlc_object_t *p_this )
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{
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services_discovery_t *p_sd = ( services_discovery_t* )p_this;
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services_discovery_sys_t *p_sys;
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int err;
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p_sd->p_sys = p_sys = (services_discovery_sys_t *)malloc(
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sizeof( services_discovery_sys_t ) );
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if( p_sd->p_sys == NULL )
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{
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msg_Err( p_sd, "out of memory" );
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return VLC_EGENERIC;
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}
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memset( p_sys, 0, sizeof(*p_sys) );
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vlc_dictionary_init( &p_sys->services_name_to_input_item, 1 );
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p_sys->simple_poll = avahi_simple_poll_new();
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if( p_sys->simple_poll == NULL )
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{
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msg_Err( p_sd, "failed to create avahi simple poll" );
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goto error;
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}
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p_sys->client = avahi_client_new( avahi_simple_poll_get(p_sys->simple_poll),
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#ifdef HAVE_AVAHI_06
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0,
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#endif
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client_callback, p_sd, &err );
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if( p_sys->client == NULL )
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{
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msg_Err( p_sd, "failed to create avahi client: %s",
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avahi_strerror( err ) );
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goto error;
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}
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p_sys->sb = avahi_service_browser_new( p_sys->client, AVAHI_IF_UNSPEC,
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AVAHI_PROTO_UNSPEC,
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"_vlc-http._tcp", NULL,
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#ifdef HAVE_AVAHI_06
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0,
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#endif
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browse_callback, p_sd );
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if( p_sys->sb == NULL )
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{
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msg_Err( p_sd, "failed to create avahi service browser" );
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goto error;
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}
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services_discovery_SetLocalizedName( p_sd, _("Bonjour") );
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p_sd->pf_run = Run;
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return VLC_SUCCESS;
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error:
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if( p_sys->sb != NULL )
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avahi_service_browser_free( p_sys->sb );
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if( p_sys->client != NULL )
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avahi_client_free( p_sys->client );
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if( p_sys->simple_poll != NULL )
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avahi_simple_poll_free( p_sys->simple_poll );
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vlc_dictionary_clear( &p_sys->services_name_to_input_item );
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free( p_sys );
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return VLC_EGENERIC;
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}
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/*****************************************************************************
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* Close: cleanup
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*****************************************************************************/
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static void Close( vlc_object_t *p_this )
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{
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services_discovery_t *p_sd = ( services_discovery_t* )p_this;
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services_discovery_sys_t *p_sys = p_sd->p_sys;
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avahi_service_browser_free( p_sys->sb );
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avahi_client_free( p_sys->client );
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avahi_simple_poll_free( p_sys->simple_poll );
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vlc_dictionary_clear( &p_sys->services_name_to_input_item );
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free( p_sys );
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}
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/*****************************************************************************
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* Run: main thread
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*****************************************************************************/
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static void Run( services_discovery_t *p_sd )
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{
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services_discovery_sys_t *p_sys = p_sd->p_sys;
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while( !p_sd->b_die )
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{
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if( avahi_simple_poll_iterate( p_sys->simple_poll, 100 ) != 0 )
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{
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msg_Err( p_sd, "poll iterate failed" );
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break;
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}
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}
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}
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