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         char *psz_addr = NULL;
 123         AvahiStringList *asl = NULL;
 124         playlist_item_t *p_item = NULL;
 125
 126         msg_Dbg( p_sd, "service '%s' of type '%s' in domain '%s'",
 127                  name, type, domain );
 128
 129         avahi_address_snprint(a, (sizeof(a)/sizeof(a[0]))-1, address);
 130         if( protocol == AVAHI_PROTO_INET6 )
 131             asprintf( &psz_addr, "[%s]", a );
 132
 133         if( txt != NULL )
 134             asl = avahi_string_list_find( txt, "path" );
 135         if( asl != NULL )
 136         {
 137             size_t size;
 138             char *key = NULL;
 139             char *value = NULL;
 140             if( avahi_string_list_get_pair( asl, &key, &value, &size ) == 0 &&
 141                 value != NULL )
 142             {
 143                 asprintf( &psz_uri, "http://%s:%d%s",
 144                           psz_addr != NULL ? psz_addr : a, port, value );
 145             }
 146             if( key != NULL )
 147                 avahi_free( (void *)key );
 148             if( value != NULL )
 149                 avahi_free( (void *)value );
 150         }
 151         else
 152         {
 153             asprintf( &psz_uri, "http://%s:%d",
 154                       psz_addr != NULL ? psz_addr : a, port );
 155         }
 156
 157         if( psz_addr != NULL )
 158             free( (void *)psz_addr );
 159
 160         if( psz_uri != NULL )
 161         {
 162             p_item = playlist_ItemNew( p_sd, psz_uri, name );
 163             free( (void *)psz_uri );
 164         }
 165         if( p_item != NULL )
 166         {
 167             p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
 168
 169             playlist_NodeAddItem( p_sys->p_playlist, p_item,
 170                                   VIEW_CATEGORY, p_sys->p_node,
 171                                   PLAYLIST_APPEND, PLAYLIST_END );
 172         }
 173     }
 174
 175     avahi_service_resolver_free( r );
 176 }
 177
 178 /*****************************************************************************
 179  * browser_callback
 180  *****************************************************************************/
 181 static void browse_callback(
 182     AvahiServiceBrowser *b,
 183     AvahiIfIndex interface,
 184     AvahiProtocol protocol,
 185     AvahiBrowserEvent event,
 186     const char *name,
 187     const char *type,
 188     const char *domain,
 189     void* userdata )
 190 {
 191     services_discovery_t *p_sd = ( services_discovery_t* )userdata;
 192     services_discovery_sys_t *p_sys = p_sd->p_sys;
 193
 194     if( event == AVAHI_BROWSER_NEW )
 195     {
 196         if( avahi_service_resolver_new( p_sys->client, interface, protocol,
 197                                         name, type, domain, AVAHI_PROTO_UNSPEC,
 198                                         resolve_callback, userdata ) == NULL )
 199         {
 200             msg_Err( p_sd, "failed to resolve service '%s': %s", name,
 201                      avahi_strerror( avahi_client_errno( p_sys->client ) ) );
 202         }
 203     }
 204     else
 205     {
 206         playlist_item_t *p_item;
 207
 208         p_item = playlist_ChildSearchName( p_sys->p_node, name );
 209         if( p_item == NULL )
 210         {
 211             msg_Err( p_sd, "failed to find service '%s' in playlist", name );
 212         }
 213         else
 214         {
 215             playlist_Delete( p_sys->p_playlist, p_item->input.i_id );
 216         }
 217     }
 218 }
 219
 220 /*****************************************************************************
 221  * Open: initialize and create stuff
 222  *****************************************************************************/
 223 static int Open( vlc_object_t *p_this )
 224 {
 225     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 226     services_discovery_sys_t *p_sys;
 227     playlist_view_t *p_view;
 228     vlc_value_t val;
 229     int err;
 230
 231     p_sd->p_sys = p_sys = (services_discovery_sys_t *)malloc(
 232         sizeof( services_discovery_sys_t ) );
 233     if( p_sd->p_sys == NULL )
 234     {
 235         msg_Err( p_sd, "out of memory" );
 236         return VLC_EGENERIC;
 237     }
 238
 239     memset( p_sys, 0, sizeof(*p_sys) );
 240
 241     p_sys->simple_poll = avahi_simple_poll_new();
 242     if( p_sys->simple_poll == NULL )
 243     {
 244         msg_Err( p_sd, "failed to create avahi simple poll" );
 245         goto error;
 246     }
 247
 248     p_sys->client = avahi_client_new( avahi_simple_poll_get(p_sys->simple_poll),
 249                                       client_callback, p_sd, &err );
 250     if( p_sys->client == NULL )
 251     {
 252         msg_Err( p_sd, "failed to create avahi client: %s",
 253                  avahi_strerror( err ) );
 254         goto error;
 255     }
 256
 257     p_sys->sb = avahi_service_browser_new( p_sys->client, AVAHI_IF_UNSPEC,
 258                                            AVAHI_PROTO_UNSPEC,
 259                                            "_vlc-http._tcp", NULL,
 260                                            browse_callback, p_sd );
 261     if( p_sys->sb == NULL )
 262     {
 263         msg_Err( p_sd, "failed to create avahi service browser" );
 264         goto error;
 265     }
 266
 267     /* Create our playlist node */
 268     p_sys->p_playlist = (playlist_t *)vlc_object_find( p_sd,
 269                                                        VLC_OBJECT_PLAYLIST,
 270                                                        FIND_ANYWHERE );
 271     if( !p_sys->p_playlist )
 272     {
 273         msg_Warn( p_sd, "unable to find playlist, cancelling");
 274         goto error;
 275     }
 276
 277     p_view = playlist_ViewFind( p_sys->p_playlist, VIEW_CATEGORY );
 278     p_sys->p_node = playlist_NodeCreate( p_sys->p_playlist, VIEW_CATEGORY,
 279                                          _("Bonjour"), p_view->p_root );
 280
 281     p_sys->p_node->i_flags |= PLAYLIST_RO_FLAG;
 282     val.b_bool = VLC_TRUE;
 283     var_Set( p_sys->p_playlist, "intf-change", val );
 284
 285     p_sd->pf_run = Run;
 286
 287     return VLC_SUCCESS;
 288
 289 error:
 290     if( p_sys->p_playlist != NULL )
 291         vlc_object_release( p_sys->p_playlist );
 292     if( p_sys->sb != NULL )
 293         avahi_service_browser_free( p_sys->sb );
 294     if( p_sys->client != NULL )
 295         avahi_client_free( p_sys->client );
 296     if( p_sys->simple_poll != NULL )
 297         avahi_simple_poll_free( p_sys->simple_poll );
 298
 299     free( (void *)p_sys );
 300
 301     return VLC_EGENERIC;
 302 }
 303
 304 /*****************************************************************************
 305  * Close: cleanup
 306  *****************************************************************************/
 307 static void Close( vlc_object_t *p_this )
 308 {
 309     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 310     services_discovery_sys_t *p_sys = p_sd->p_sys;
 311
 312     avahi_service_browser_free( p_sys->sb );
 313     avahi_client_free( p_sys->client );
 314     avahi_simple_poll_free( p_sys->simple_poll );
 315
 316     playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node, VLC_TRUE, VLC_TRUE );
 317     vlc_object_release( p_sys->p_playlist );
 318
 319     free( p_sys );
 320 }
 321
 322 /*****************************************************************************
 323  * Run: main thread
 324  *****************************************************************************/
 325 static void Run( services_discovery_t *p_sd )
 326 {
 327     services_discovery_sys_t *p_sys = p_sd->p_sys;
 328
 329     while( !p_sd->b_die )
 330     {
 331         if( avahi_simple_poll_iterate( p_sys->simple_poll, 100 ) != 0 )
 332         {
 333             msg_Err( p_sd, "poll iterate failed" );
 334             break;
 335         }
 336     }
 337 }