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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Includes
  26  *****************************************************************************/
  27 #include <stdlib.h>                                      /* malloc(), free() */
  28
  29 #include <vlc/vlc.h>
  30 #include <vlc/intf.h>
  31
  32 #include <avahi-client/client.h>
  33 #include <avahi-common/simple-watch.h>
  34 #include <avahi-common/malloc.h>
  35 #include <avahi-common/error.h>
  36
  37 /*****************************************************************************
  38  * Module descriptor
  39  *****************************************************************************/
  40
  41 /* Callbacks */
  42     static int  Open ( vlc_object_t * );
  43     static void Close( vlc_object_t * );
  44
  45 vlc_module_begin();
  46     set_shortname( "Bonjour" );
  47     set_description( _("Bonjour services") );
  48     set_category( CAT_PLAYLIST );
  49     set_subcategory( SUBCAT_PLAYLIST_SD );
  50     set_capability( "services_discovery", 0 );
  51     set_callbacks( Open, Close );
  52 vlc_module_end();
  53
  54 /*****************************************************************************
  55  * Local structures
  56  *****************************************************************************/
  57
  58 struct services_discovery_sys_t
  59 {
  60     /* playlist node */
  61     playlist_item_t     *p_node;
  62     playlist_t          *p_playlist;
  63
  64     AvahiSimplePoll     *simple_poll;
  65     AvahiClient         *client;
  66     AvahiServiceBrowser *sb;
  67 };
  68
  69 /*****************************************************************************
  70  * Local prototypes
  71  *****************************************************************************/
  72
  73 /* Main functions */
  74     static void Run    ( services_discovery_t *p_intf );
  75
  76 /*****************************************************************************
  77  * client_callback
  78  *****************************************************************************/
  79 static void client_callback( AvahiClient *c, AvahiClientState state,
  80                              void * userdata )
  81 {
  82     services_discovery_t *p_sd = ( services_discovery_t* )userdata;
  83     services_discovery_sys_t *p_sys = p_sd->p_sys;
  84
  85     if( state == AVAHI_CLIENT_DISCONNECTED )
  86     {
  87         msg_Err( p_sd, "avahi client disconnected" );
  88         avahi_simple_poll_quit( p_sys->simple_poll );
  89     }
  90 }
  91
  92 /*****************************************************************************
  93  * resolve_callback
  94  *****************************************************************************/
  95 static void resolve_callback(
  96     AvahiServiceResolver *r,
  97     AvahiIfIndex interface,
  98     AvahiProtocol protocol,
  99     AvahiResolverEvent event,
 100     const char *name,
 101     const char *type,
 102     const char *domain,
 103     const char *host_name,
 104     const AvahiAddress *address,
 105     uint16_t port,
 106     AvahiStringList *txt,
 107     void* userdata )
 108 {
 109     services_discovery_t *p_sd = ( services_discovery_t* )userdata;
 110     services_discovery_sys_t *p_sys = p_sd->p_sys;
 111
 112     if( event == AVAHI_RESOLVER_TIMEOUT )
 113     {
 114         msg_Err( p_sd,
 115                  "failed to resolve service '%s' of type '%s' in domain '%s'",
 116                  name, type, domain );
 117     }
 118     else if( event == AVAHI_RESOLVER_FOUND )
 119     {
 120         char a[128];
 121         char *psz_uri = NULL;
 122         AvahiStringList *asl;
 123         playlist_item_t *p_item = NULL;
 124
 125         msg_Dbg( p_sd, "service '%s' of type '%s' in domain '%s'",
 126                  name, type, domain );
 127
 128         avahi_address_snprint(a, (sizeof(a)/sizeof(a[0]))-1, address);
 129
 130         asl = avahi_string_list_find( txt, "path" );
 131         if( asl != NULL )
 132         {
 133             size_t size;
 134             char *key = NULL;
 135             char *value = NULL;
 136             if( avahi_string_list_get_pair( asl, &key, &value, &size ) == 0 )
 137                 asprintf( &psz_uri, "http://%s:%d%s", a, port, value );
 138         }
 139         else
 140         {
 141             asprintf( &psz_uri, "http://%s:%d", a, port );
 142         }
 143
 144         if( psz_uri != NULL )
 145             p_item = playlist_ItemNew( p_sd, psz_uri, name );
 146         if( p_item != NULL )
 147         {
 148             p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
 149
 150             playlist_NodeAddItem( p_sys->p_playlist, p_item,
 151                                   VIEW_CATEGORY, p_sys->p_node,
 152                                   PLAYLIST_APPEND, PLAYLIST_END );
 153         }
 154     }
 155
 156     avahi_service_resolver_free( r );
 157 }
 158
 159 /*****************************************************************************
 160  * browser_callback
 161  *****************************************************************************/
 162 static void browse_callback(
 163     AvahiServiceBrowser *b,
 164     AvahiIfIndex interface,
 165     AvahiProtocol protocol,
 166     AvahiBrowserEvent event,
 167     const char *name,
 168     const char *type,
 169     const char *domain,
 170     void* userdata )
 171 {
 172     services_discovery_t *p_sd = ( services_discovery_t* )userdata;
 173     services_discovery_sys_t *p_sys = p_sd->p_sys;
 174
 175     if( event == AVAHI_BROWSER_NEW )
 176     {
 177         if( avahi_service_resolver_new( p_sys->client, interface, protocol,
 178                                         name, type, domain, AVAHI_PROTO_UNSPEC,
 179                                         resolve_callback, userdata ) == NULL )
 180         {
 181             msg_Err( p_sd, "failed to resolve service '%s': %s", name,
 182                      avahi_strerror( avahi_client_errno( p_sys->client ) ) );
 183         }
 184     }
 185     else
 186     {
 187         playlist_item_t *p_item;
 188
 189         p_item = playlist_ChildSearchName( p_sys->p_node, name );
 190         if( p_item == NULL )
 191         {
 192             msg_Err( p_sd, "failed to find service '%s' in playlist", name );
 193         }
 194         else
 195         {
 196             playlist_Delete( p_sys->p_playlist, p_item->input.i_id );
 197         }
 198     }
 199 }
 200
 201 /*****************************************************************************
 202  * Open: initialize and create stuff
 203  *****************************************************************************/
 204 static int Open( vlc_object_t *p_this )
 205 {
 206     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 207     services_discovery_sys_t *p_sys;
 208     playlist_view_t *p_view;
 209     vlc_value_t val;
 210     int err;
 211
 212     p_sd->p_sys = p_sys = (services_discovery_sys_t *)malloc(
 213         sizeof( services_discovery_sys_t ) );
 214     if( p_sd->p_sys == NULL )
 215     {
 216         msg_Err( p_sd, "out of memory" );
 217         return VLC_EGENERIC;
 218     }
 219
 220     memset( p_sys, 0, sizeof(*p_sys) );
 221
 222     p_sys->simple_poll = avahi_simple_poll_new();
 223     if( p_sys->simple_poll == NULL )
 224     {
 225         msg_Err( p_sd, "failed to create avahi simple poll" );
 226         goto error;
 227     }
 228
 229     p_sys->client = avahi_client_new( avahi_simple_poll_get(p_sys->simple_poll),
 230                                       client_callback, p_sd, &err );
 231     if( p_sys->client == NULL )
 232     {
 233         msg_Err( p_sd, "failed to create avahi client: %s",
 234                  avahi_strerror( err ) );
 235         goto error;
 236     }
 237
 238     p_sys->sb = avahi_service_browser_new( p_sys->client, AVAHI_IF_UNSPEC,
 239                                            AVAHI_PROTO_UNSPEC,
 240                                            "_vlc-http._tcp", NULL,
 241                                            browse_callback, p_sd );
 242     if( p_sys->sb == NULL )
 243     {
 244         msg_Err( p_sd, "failed to create avahi service browser" );
 245         goto error;
 246     }
 247
 248     /* Create our playlist node */
 249     p_sys->p_playlist = (playlist_t *)vlc_object_find( p_sd,
 250                                                        VLC_OBJECT_PLAYLIST,
 251                                                        FIND_ANYWHERE );
 252     if( !p_sys->p_playlist )
 253     {
 254         msg_Warn( p_sd, "unable to find playlist, cancelling");
 255         goto error;
 256     }
 257
 258     p_view = playlist_ViewFind( p_sys->p_playlist, VIEW_CATEGORY );
 259     p_sys->p_node = playlist_NodeCreate( p_sys->p_playlist, VIEW_CATEGORY,
 260                                          _("Bonjour"), p_view->p_root );
 261
 262     p_sys->p_node->i_flags |= PLAYLIST_RO_FLAG;
 263     val.b_bool = VLC_TRUE;
 264     var_Set( p_sys->p_playlist, "intf-change", val );
 265
 266     p_sd->pf_run = Run;
 267
 268     return VLC_SUCCESS;
 269
 270 error:
 271     if( p_sys->p_playlist != NULL )
 272         vlc_object_release( p_sys->p_playlist );
 273     if( p_sys->sb != NULL )
 274         avahi_service_browser_free( p_sys->sb );
 275     if( p_sys->client != NULL )
 276         avahi_client_free( p_sys->client );
 277     if( p_sys->simple_poll != NULL )
 278         avahi_simple_poll_free( p_sys->simple_poll );
 279
 280     free( (void *)p_sys );
 281
 282     return VLC_EGENERIC;
 283 }
 284
 285 /*****************************************************************************
 286  * Close: cleanup
 287  *****************************************************************************/
 288 static void Close( vlc_object_t *p_this )
 289 {
 290     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 291     services_discovery_sys_t *p_sys = p_sd->p_sys;
 292
 293     avahi_service_browser_free( p_sys->sb );
 294     avahi_client_free( p_sys->client );
 295     avahi_simple_poll_free( p_sys->simple_poll );
 296
 297     playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node, VLC_TRUE, VLC_TRUE );
 298     vlc_object_release( p_sys->p_playlist );
 299
 300     free( p_sys );
 301 }
 302
 303 /*****************************************************************************
 304  * Run: main thread
 305  *****************************************************************************/
 306 static void Run( services_discovery_t *p_sd )
 307 {
 308     services_discovery_sys_t *p_sys = p_sd->p_sys;
 309
 310     while( !p_sd->b_die )
 311     {
 312         if( avahi_simple_poll_iterate( p_sys->simple_poll, 100 ) != 0 )
 313         {
 314             msg_Err( p_sd, "poll iterate failed" );
 315             break;
 316         }
 317     }
 318 }