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 #include <stdlib.h>                                      /* malloc(), free() */
  28
  29 #include <vlc/vlc.h>
  30 #include <vlc/intf.h>
  31
  32 #include <avahi-client/client.h>
  33 #ifdef HAVE_AVAHI_06
  34 # include <avahi-client/publish.h>
  35 # include <avahi-client/lookup.h>
  36 #endif
  37 #include <avahi-common/simple-watch.h>
  38 #include <avahi-common/malloc.h>
  39 #include <avahi-common/error.h>
  40
  41 /*****************************************************************************
  42  * Module descriptor
  43  *****************************************************************************/
  44
  45 /* Callbacks */
  46     static int  Open ( vlc_object_t * );
  47     static void Close( vlc_object_t * );
  48
  49 vlc_module_begin();
  50     set_shortname( "Bonjour" );
  51     set_description( _("Bonjour services") );
  52     set_category( CAT_PLAYLIST );
  53     set_subcategory( SUBCAT_PLAYLIST_SD );
  54     set_capability( "services_discovery", 0 );
  55     set_callbacks( Open, Close );
  56 vlc_module_end();
  57
  58 /*****************************************************************************
  59  * Local structures
  60  *****************************************************************************/
  61
  62 struct services_discovery_sys_t
  63 {
  64     /* playlist node */
  65     playlist_item_t     *p_node;
  66     playlist_t          *p_playlist;
  67
  68     AvahiSimplePoll     *simple_poll;
  69     AvahiClient         *client;
  70     AvahiServiceBrowser *sb;
  71 };
  72
  73 /*****************************************************************************
  74  * Local prototypes
  75  *****************************************************************************/
  76
  77 /* Main functions */
  78     static void Run    ( services_discovery_t *p_intf );
  79
  80 /*****************************************************************************
  81  * client_callback
  82  *****************************************************************************/
  83 static void client_callback( AvahiClient *c, AvahiClientState state,
  84                              void * userdata )
  85 {
  86     services_discovery_t *p_sd = ( services_discovery_t* )userdata;
  87     services_discovery_sys_t *p_sys = p_sd->p_sys;
  88
  89 #ifdef HAVE_AVAHI_06
  90     if( state == AVAHI_CLIENT_FAILURE &&
  91         (avahi_client_errno(c) == AVAHI_ERR_DISCONNECTED) )
  92 #else
  93     if( state == AVAHI_CLIENT_DISCONNECTED )
  94 #endif
  95     {
  96         msg_Err( p_sd, "avahi client disconnected" );
  97         avahi_simple_poll_quit( p_sys->simple_poll );
  98     }
  99 }
 100
 101 /*****************************************************************************
 102  * resolve_callback
 103  *****************************************************************************/
 104 static void resolve_callback(
 105     AvahiServiceResolver *r,
 106     AvahiIfIndex interface,
 107     AvahiProtocol protocol,
 108     AvahiResolverEvent event,
 109     const char *name,
 110     const char *type,
 111     const char *domain,
 112     const char *host_name,
 113     const AvahiAddress *address,
 114     uint16_t port,
 115     AvahiStringList *txt,
 116 #ifdef HAVE_AVAHI_06
 117     AvahiLookupResultFlags flags,
 118 #endif
 119     void* userdata )
 120 {
 121     services_discovery_t *p_sd = ( services_discovery_t* )userdata;
 122     services_discovery_sys_t *p_sys = p_sd->p_sys;
 123
 124 #ifdef HAVE_AVAHI_06
 125     if( event == AVAHI_RESOLVER_FAILURE )
 126 #else
 127     if( event == AVAHI_RESOLVER_TIMEOUT )
 128 #endif
 129     {
 130         msg_Err( p_sd,
 131                  "failed to resolve service '%s' of type '%s' in domain '%s'",
 132                  name, type, domain );
 133     }
 134     else if( event == AVAHI_RESOLVER_FOUND )
 135     {
 136         char a[128];
 137         char *psz_uri = NULL;
 138         char *psz_addr = NULL;
 139         AvahiStringList *asl = NULL;
 140         playlist_item_t *p_item = NULL;
 141
 142         msg_Dbg( p_sd, "service '%s' of type '%s' in domain '%s'",
 143                  name, type, domain );
 144
 145         avahi_address_snprint(a, (sizeof(a)/sizeof(a[0]))-1, address);
 146         if( protocol == AVAHI_PROTO_INET6 )
 147             asprintf( &psz_addr, "[%s]", a );
 148
 149         if( txt != NULL )
 150             asl = avahi_string_list_find( txt, "path" );
 151         if( asl != NULL )
 152         {
 153             size_t size;
 154             char *key = NULL;
 155             char *value = NULL;
 156             if( avahi_string_list_get_pair( asl, &key, &value, &size ) == 0 &&
 157                 value != NULL )
 158             {
 159                 asprintf( &psz_uri, "http://%s:%d%s",
 160                           psz_addr != NULL ? psz_addr : a, port, value );
 161             }
 162             if( key != NULL )
 163                 avahi_free( (void *)key );
 164             if( value != NULL )
 165                 avahi_free( (void *)value );
 166         }
 167         else
 168         {
 169             asprintf( &psz_uri, "http://%s:%d",
 170                       psz_addr != NULL ? psz_addr : a, port );
 171         }
 172
 173         if( psz_addr != NULL )
 174             free( (void *)psz_addr );
 175
 176         if( psz_uri != NULL )
 177         {
 178             p_item = playlist_ItemNew( p_sd, psz_uri, name );
 179             free( (void *)psz_uri );
 180         }
 181         if( p_item != NULL )
 182         {
 183             p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
 184
 185             playlist_NodeAddItem( p_sys->p_playlist, p_item,
 186                                   VIEW_CATEGORY, p_sys->p_node,
 187                                   PLAYLIST_APPEND, PLAYLIST_END );
 188         }
 189     }
 190
 191     avahi_service_resolver_free( r );
 192 }
 193
 194 /*****************************************************************************
 195  * browser_callback
 196  *****************************************************************************/
 197 static void browse_callback(
 198     AvahiServiceBrowser *b,
 199     AvahiIfIndex interface,
 200     AvahiProtocol protocol,
 201     AvahiBrowserEvent event,
 202     const char *name,
 203     const char *type,
 204     const char *domain,
 205 #ifdef HAVE_AVAHI_06
 206     AvahiLookupResultFlags flags,
 207 #endif
 208     void* userdata )
 209 {
 210     services_discovery_t *p_sd = ( services_discovery_t* )userdata;
 211     services_discovery_sys_t *p_sys = p_sd->p_sys;
 212
 213     if( event == AVAHI_BROWSER_NEW )
 214     {
 215         if( avahi_service_resolver_new( p_sys->client, interface, protocol,
 216                                         name, type, domain, AVAHI_PROTO_UNSPEC,
 217 #ifdef HAVE_AVAHI_06
 218                                         0,
 219 #endif
 220                                         resolve_callback, userdata ) == NULL )
 221         {
 222             msg_Err( p_sd, "failed to resolve service '%s': %s", name,
 223                      avahi_strerror( avahi_client_errno( p_sys->client ) ) );
 224         }
 225     }
 226     else
 227     {
 228         playlist_item_t *p_item;
 229
 230         p_item = playlist_ChildSearchName( p_sys->p_node, name );
 231         if( p_item == NULL )
 232         {
 233             msg_Err( p_sd, "failed to find service '%s' in playlist", name );
 234         }
 235         else
 236         {
 237             playlist_Delete( p_sys->p_playlist, p_item->input.i_id );
 238         }
 239     }
 240 }
 241
 242 /*****************************************************************************
 243  * Open: initialize and create stuff
 244  *****************************************************************************/
 245 static int Open( vlc_object_t *p_this )
 246 {
 247     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 248     services_discovery_sys_t *p_sys;
 249     playlist_view_t *p_view;
 250     vlc_value_t val;
 251     int err;
 252
 253     p_sd->p_sys = p_sys = (services_discovery_sys_t *)malloc(
 254         sizeof( services_discovery_sys_t ) );
 255     if( p_sd->p_sys == NULL )
 256     {
 257         msg_Err( p_sd, "out of memory" );
 258         return VLC_EGENERIC;
 259     }
 260
 261     memset( p_sys, 0, sizeof(*p_sys) );
 262
 263     p_sys->simple_poll = avahi_simple_poll_new();
 264     if( p_sys->simple_poll == NULL )
 265     {
 266         msg_Err( p_sd, "failed to create avahi simple poll" );
 267         goto error;
 268     }
 269
 270     p_sys->client = avahi_client_new( avahi_simple_poll_get(p_sys->simple_poll),
 271 #ifdef HAVE_AVAHI_06
 272                                       0,
 273 #endif
 274                                       client_callback, p_sd, &err );
 275     if( p_sys->client == NULL )
 276     {
 277         msg_Err( p_sd, "failed to create avahi client: %s",
 278                  avahi_strerror( err ) );
 279         goto error;
 280     }
 281
 282     p_sys->sb = avahi_service_browser_new( p_sys->client, AVAHI_IF_UNSPEC,
 283                                            AVAHI_PROTO_UNSPEC,
 284                                            "_vlc-http._tcp", NULL,
 285 #ifdef HAVE_AVAHI_06
 286                                            0,
 287 #endif
 288                                            browse_callback, p_sd );
 289     if( p_sys->sb == NULL )
 290     {
 291         msg_Err( p_sd, "failed to create avahi service browser" );
 292         goto error;
 293     }
 294
 295     /* Create our playlist node */
 296     p_sys->p_playlist = (playlist_t *)vlc_object_find( p_sd,
 297                                                        VLC_OBJECT_PLAYLIST,
 298                                                        FIND_ANYWHERE );
 299     if( !p_sys->p_playlist )
 300     {
 301         msg_Warn( p_sd, "unable to find playlist, cancelling");
 302         goto error;
 303     }
 304
 305     p_view = playlist_ViewFind( p_sys->p_playlist, VIEW_CATEGORY );
 306     p_sys->p_node = playlist_NodeCreate( p_sys->p_playlist, VIEW_CATEGORY,
 307                                          _("Bonjour"), p_view->p_root );
 308
 309     p_sys->p_node->i_flags |= PLAYLIST_RO_FLAG;
 310     val.b_bool = VLC_TRUE;
 311     var_Set( p_sys->p_playlist, "intf-change", val );
 312
 313     p_sd->pf_run = Run;
 314
 315     return VLC_SUCCESS;
 316
 317 error:
 318     if( p_sys->p_playlist != NULL )
 319         vlc_object_release( p_sys->p_playlist );
 320     if( p_sys->sb != NULL )
 321         avahi_service_browser_free( p_sys->sb );
 322     if( p_sys->client != NULL )
 323         avahi_client_free( p_sys->client );
 324     if( p_sys->simple_poll != NULL )
 325         avahi_simple_poll_free( p_sys->simple_poll );
 326
 327     free( (void *)p_sys );
 328
 329     return VLC_EGENERIC;
 330 }
 331
 332 /*****************************************************************************
 333  * Close: cleanup
 334  *****************************************************************************/
 335 static void Close( vlc_object_t *p_this )
 336 {
 337     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 338     services_discovery_sys_t *p_sys = p_sd->p_sys;
 339
 340     avahi_service_browser_free( p_sys->sb );
 341     avahi_client_free( p_sys->client );
 342     avahi_simple_poll_free( p_sys->simple_poll );
 343
 344     playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node, VLC_TRUE, VLC_TRUE );
 345     vlc_object_release( p_sys->p_playlist );
 346
 347     free( p_sys );
 348 }
 349
 350 /*****************************************************************************
 351  * Run: main thread
 352  *****************************************************************************/
 353 static void Run( services_discovery_t *p_sd )
 354 {
 355     services_discovery_sys_t *p_sys = p_sd->p_sys;
 356
 357     while( !p_sd->b_die )
 358     {
 359         if( avahi_simple_poll_iterate( p_sys->simple_poll, 100 ) != 0 )
 360         {
 361             msg_Err( p_sd, "poll iterate failed" );
 362             break;
 363         }
 364     }
 365 }