git.sesse.net Git - vlc/blob - modules/services_discovery/bonjour.c

   1 /*****************************************************************************
   2  * bonjour.c: Bonjour services discovery module
   3  *****************************************************************************
   4  * Copyright (C) 2005 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Jon Lech Johansen <jon@nanocrew.net>
   8  *
   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.
  13  *
  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.
  18  *
  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  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Includes
  26  *****************************************************************************/
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc/vlc.h>
  33 #include <vlc_playlist.h>
  34 #include <vlc_arrays.h>
  35
  36 #include <avahi-client/client.h>
  37 #ifdef HAVE_AVAHI_06
  38 # include <avahi-client/publish.h>
  39 # include <avahi-client/lookup.h>
  40 #endif
  41 #include <avahi-common/simple-watch.h>
  42 #include <avahi-common/malloc.h>
  43 #include <avahi-common/error.h>
  44
  45 /*****************************************************************************
  46  * Module descriptor
  47  *****************************************************************************/
  48
  49 /* Callbacks */
  50     static int  Open ( vlc_object_t * );
  51     static void Close( vlc_object_t * );
  52
  53 vlc_module_begin();
  54     set_shortname( "Bonjour" );
  55     set_description( _("Bonjour services") );
  56     set_category( CAT_PLAYLIST );
  57     set_subcategory( SUBCAT_PLAYLIST_SD );
  58     set_capability( "services_discovery", 0 );
  59     set_callbacks( Open, Close );
  60 vlc_module_end();
  61
  62 /*****************************************************************************
  63  * Local structures
  64  *****************************************************************************/
  65
  66 struct services_discovery_sys_t
  67 {
  68     AvahiSimplePoll     *simple_poll;
  69     AvahiClient         *client;
  70     AvahiServiceBrowser *sb;
  71     vlc_dictionary_t    services_name_to_input_item;
  72 };
  73
  74 /*****************************************************************************
  75  * Local prototypes
  76  *****************************************************************************/
  77
  78 /* Main functions */
  79     static void Run    ( services_discovery_t *p_intf );
  80
  81 /*****************************************************************************
  82  * client_callback
  83  *****************************************************************************/
  84 static void client_callback( AvahiClient *c, AvahiClientState state,
  85                              void * userdata )
  86 {
  87     services_discovery_t *p_sd = ( services_discovery_t* )userdata;
  88     services_discovery_sys_t *p_sys = p_sd->p_sys;
  89
  90 #ifdef HAVE_AVAHI_06
  91     if( state == AVAHI_CLIENT_FAILURE &&
  92         (avahi_client_errno(c) == AVAHI_ERR_DISCONNECTED) )
  93 #else
  94     if( state == AVAHI_CLIENT_DISCONNECTED )
  95 #endif
  96     {
  97         msg_Err( p_sd, "avahi client disconnected" );
  98         avahi_simple_poll_quit( p_sys->simple_poll );
  99     }
 100 }
 101
 102 /*****************************************************************************
 103  * resolve_callback
 104  *****************************************************************************/
 105 static void resolve_callback(
 106     AvahiServiceResolver *r,
 107     AvahiIfIndex interface,
 108     AvahiProtocol protocol,
 109     AvahiResolverEvent event,
 110     const char *name,
 111     const char *type,
 112     const char *domain,
 113     const char *host_name,
 114     const AvahiAddress *address,
 115     uint16_t port,
 116     AvahiStringList *txt,
 117 #ifdef HAVE_AVAHI_06
 118     AvahiLookupResultFlags flags,
 119 #endif
 120     void* userdata )
 121 {
 122     services_discovery_t *p_sd = ( services_discovery_t* )userdata;
 123     services_discovery_sys_t *p_sys = p_sd->p_sys;
 124
 125 #ifdef HAVE_AVAHI_06
 126     if( event == AVAHI_RESOLVER_FAILURE )
 127 #else
 128     if( event == AVAHI_RESOLVER_TIMEOUT )
 129 #endif
 130     {
 131         msg_Err( p_sd,
 132                  "failed to resolve service '%s' of type '%s' in domain '%s'",
 133                  name, type, domain );
 134     }
 135     else if( event == AVAHI_RESOLVER_FOUND )
 136     {
 137         char a[128];
 138         char *psz_uri = NULL;
 139         char *psz_addr = NULL;
 140         AvahiStringList *asl = NULL;
 141         input_item_t *p_input = NULL;
 142
 143         msg_Dbg( p_sd, "service '%s' of type '%s' in domain '%s'",
 144                  name, type, domain );
 145
 146         avahi_address_snprint(a, (sizeof(a)/sizeof(a[0]))-1, address);
 147         if( protocol == AVAHI_PROTO_INET6 )
 148             if( asprintf( &psz_addr, "[%s]", a ) == -1 )
 149                 return;
 150
 151         if( txt != NULL )
 152             asl = avahi_string_list_find( txt, "path" );
 153         if( asl != NULL )
 154         {
 155             size_t size;
 156             char *key = NULL;
 157             char *value = NULL;
 158             if( avahi_string_list_get_pair( asl, &key, &value, &size ) == 0 &&
 159                 value != NULL )
 160             {
 161                 if( asprintf( &psz_uri, "http://%s:%d%s",
 162                           psz_addr != NULL ? psz_addr : a, port, value ) == -1 )
 163                 {
 164                     free( psz_addr );
 165                     return;
 166                 }
 167             }
 168             if( key != NULL )
 169                 avahi_free( (void *)key );
 170             if( value != NULL )
 171                 avahi_free( (void *)value );
 172         }
 173         else
 174         {
 175             if( asprintf( &psz_uri, "http://%s:%d",
 176                       psz_addr != NULL ? psz_addr : a, port ) == -1 )
 177             {
 178                 free( psz_addr );
 179                 return;
 180             }
 181         }
 182
 183         if( psz_addr != NULL )
 184             free( (void *)psz_addr );
 185
 186         if( psz_uri != NULL )
 187         {
 188             p_input = input_ItemNewExt( p_sd, psz_uri, name, 0, NULL, -1 );
 189             free( (void *)psz_uri );
 190         }
 191         if( p_input != NULL )
 192         {
 193             vlc_dictionary_insert( &p_sys->services_name_to_input_item,
 194                 name, p_input );
 195             services_discovery_AddItem( p_sd, p_input, NULL /* no category */ );
 196             vlc_gc_decref( p_input );
 197        }
 198     }
 199
 200     avahi_service_resolver_free( r );
 201 }
 202
 203 /*****************************************************************************
 204  * browser_callback
 205  *****************************************************************************/
 206 static void browse_callback(
 207     AvahiServiceBrowser *b,
 208     AvahiIfIndex interface,
 209     AvahiProtocol protocol,
 210     AvahiBrowserEvent event,
 211     const char *name,
 212     const char *type,
 213     const char *domain,
 214 #ifdef HAVE_AVAHI_06
 215     AvahiLookupResultFlags flags,
 216 #endif
 217     void* userdata )
 218 {
 219     services_discovery_t *p_sd = ( services_discovery_t* )userdata;
 220     services_discovery_sys_t *p_sys = p_sd->p_sys;
 221     if( event == AVAHI_BROWSER_NEW )
 222     {
 223         if( avahi_service_resolver_new( p_sys->client, interface, protocol,
 224                                         name, type, domain, AVAHI_PROTO_UNSPEC,
 225 #ifdef HAVE_AVAHI_06
 226                                         0,
 227 #endif
 228                                         resolve_callback, userdata ) == NULL )
 229         {
 230             msg_Err( p_sd, "failed to resolve service '%s': %s", name,
 231                      avahi_strerror( avahi_client_errno( p_sys->client ) ) );
 232         }
 233     }
 234     else if( name )
 235     {
 236         /** \todo Store the input id and search it, rather than searching the items */
 237         input_item_t *p_item;
 238         p_item = vlc_dictionary_value_for_key(
 239                         &p_sys->services_name_to_input_item,
 240                         name );
 241         if( !p_item )
 242             msg_Err( p_sd, "failed to find service '%s' in playlist", name );
 243         else
 244         {
 245             services_discovery_RemoveItem( p_sd, p_item );
 246             vlc_dictionary_remove_value_for_key(
 247                         &p_sys->services_name_to_input_item,
 248                         name );
 249         }
 250     }
 251 }
 252
 253 /*****************************************************************************
 254  * Open: initialize and create stuff
 255  *****************************************************************************/
 256 static int Open( vlc_object_t *p_this )
 257 {
 258     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 259     services_discovery_sys_t *p_sys;
 260     int err;
 261
 262     p_sd->p_sys = p_sys = (services_discovery_sys_t *)malloc(
 263         sizeof( services_discovery_sys_t ) );
 264     if( p_sd->p_sys == NULL )
 265     {
 266         msg_Err( p_sd, "out of memory" );
 267         return VLC_EGENERIC;
 268     }
 269
 270     memset( p_sys, 0, sizeof(*p_sys) );
 271
 272     vlc_dictionary_init( &p_sys->services_name_to_input_item, 1 );
 273
 274     p_sys->simple_poll = avahi_simple_poll_new();
 275     if( p_sys->simple_poll == NULL )
 276     {
 277         msg_Err( p_sd, "failed to create avahi simple poll" );
 278         goto error;
 279     }
 280
 281     p_sys->client = avahi_client_new( avahi_simple_poll_get(p_sys->simple_poll),
 282 #ifdef HAVE_AVAHI_06
 283                                       0,
 284 #endif
 285                                       client_callback, p_sd, &err );
 286     if( p_sys->client == NULL )
 287     {
 288         msg_Err( p_sd, "failed to create avahi client: %s",
 289                  avahi_strerror( err ) );
 290         goto error;
 291     }
 292
 293     p_sys->sb = avahi_service_browser_new( p_sys->client, AVAHI_IF_UNSPEC,
 294                                            AVAHI_PROTO_UNSPEC,
 295                                            "_vlc-http._tcp", NULL,
 296 #ifdef HAVE_AVAHI_06
 297                                            0,
 298 #endif
 299                                            browse_callback, p_sd );
 300     if( p_sys->sb == NULL )
 301     {
 302         msg_Err( p_sd, "failed to create avahi service browser" );
 303         goto error;
 304     }
 305
 306     services_discovery_SetLocalizedName( p_sd, _("Bonjour") );
 307
 308     p_sd->pf_run = Run;
 309
 310     return VLC_SUCCESS;
 311
 312 error:
 313     if( p_sys->sb != NULL )
 314         avahi_service_browser_free( p_sys->sb );
 315     if( p_sys->client != NULL )
 316         avahi_client_free( p_sys->client );
 317     if( p_sys->simple_poll != NULL )
 318         avahi_simple_poll_free( p_sys->simple_poll );
 319
 320     vlc_dictionary_clear( &p_sys->services_name_to_input_item );
 321     free( p_sys );
 322
 323     return VLC_EGENERIC;
 324 }
 325
 326 /*****************************************************************************
 327  * Close: cleanup
 328  *****************************************************************************/
 329 static void Close( vlc_object_t *p_this )
 330 {
 331     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 332     services_discovery_sys_t *p_sys = p_sd->p_sys;
 333
 334     avahi_service_browser_free( p_sys->sb );
 335     avahi_client_free( p_sys->client );
 336     avahi_simple_poll_free( p_sys->simple_poll );
 337
 338     vlc_dictionary_clear( &p_sys->services_name_to_input_item );
 339     free( p_sys );
 340 }
 341
 342 /*****************************************************************************
 343  * Run: main thread
 344  *****************************************************************************/
 345 static void Run( services_discovery_t *p_sd )
 346 {
 347     services_discovery_sys_t *p_sys = p_sd->p_sys;
 348
 349     while( !p_sd->b_die )
 350     {
 351         if( avahi_simple_poll_iterate( p_sys->simple_poll, 100 ) != 0 )
 352         {
 353             msg_Err( p_sd, "poll iterate failed" );
 354             break;
 355         }
 356     }
 357 }