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 #define _GNU_SOURCE
  28 #include <stdlib.h>                                      /* malloc(), free() */
  29
  30 #include <vlc/vlc.h>
  31 #include <vlc_playlist.h>
  32
  33 #include <avahi-client/client.h>
  34 #ifdef HAVE_AVAHI_06
  35 # include <avahi-client/publish.h>
  36 # include <avahi-client/lookup.h>
  37 #endif
  38 #include <avahi-common/simple-watch.h>
  39 #include <avahi-common/malloc.h>
  40 #include <avahi-common/error.h>
  41
  42 /*****************************************************************************
  43  * Module descriptor
  44  *****************************************************************************/
  45
  46 /* Callbacks */
  47     static int  Open ( vlc_object_t * );
  48     static void Close( vlc_object_t * );
  49
  50 vlc_module_begin();
  51     set_shortname( "Bonjour" );
  52     set_description( _("Bonjour services") );
  53     set_category( CAT_PLAYLIST );
  54     set_subcategory( SUBCAT_PLAYLIST_SD );
  55     set_capability( "services_discovery", 0 );
  56     set_callbacks( Open, Close );
  57 vlc_module_end();
  58
  59 /*****************************************************************************
  60  * Local structures
  61  *****************************************************************************/
  62
  63 struct services_discovery_sys_t
  64 {
  65     /* playlist node */
  66     playlist_item_t     *p_node_cat, *p_node_one;
  67     playlist_t          *p_playlist;
  68
  69     AvahiSimplePoll     *simple_poll;
  70     AvahiClient         *client;
  71     AvahiServiceBrowser *sb;
  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             asprintf( &psz_addr, "[%s]", a );
 149
 150         if( txt != NULL )
 151             asl = avahi_string_list_find( txt, "path" );
 152         if( asl != NULL )
 153         {
 154             size_t size;
 155             char *key = NULL;
 156             char *value = NULL;
 157             if( avahi_string_list_get_pair( asl, &key, &value, &size ) == 0 &&
 158                 value != NULL )
 159             {
 160                 asprintf( &psz_uri, "http://%s:%d%s",
 161                           psz_addr != NULL ? psz_addr : a, port, value );
 162             }
 163             if( key != NULL )
 164                 avahi_free( (void *)key );
 165             if( value != NULL )
 166                 avahi_free( (void *)value );
 167         }
 168         else
 169         {
 170             asprintf( &psz_uri, "http://%s:%d",
 171                       psz_addr != NULL ? psz_addr : a, port );
 172         }
 173
 174         if( psz_addr != NULL )
 175             free( (void *)psz_addr );
 176
 177         if( psz_uri != NULL )
 178         {
 179             p_input = input_ItemNewExt( p_sd, psz_uri, name, 0, NULL, -1 );
 180             free( (void *)psz_uri );
 181         }
 182         if( p_input != NULL )
 183         {
 184             playlist_item_t *p_item;
 185             p_item = playlist_NodeAddInput( p_sys->p_playlist, p_input,
 186                                             p_sys->p_node_cat,
 187                                             PLAYLIST_APPEND, PLAYLIST_END,
 188                                             VLC_FALSE);
 189             p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
 190             p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
 191             p_item = playlist_NodeAddInput( p_sys->p_playlist, p_input,
 192                                             p_sys->p_node_one,
 193                                             PLAYLIST_APPEND, PLAYLIST_END,
 194                                             VLC_FALSE );
 195             p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
 196             p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
 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
 222     if( event == AVAHI_BROWSER_NEW )
 223     {
 224         if( avahi_service_resolver_new( p_sys->client, interface, protocol,
 225                                         name, type, domain, AVAHI_PROTO_UNSPEC,
 226 #ifdef HAVE_AVAHI_06
 227                                         0,
 228 #endif
 229                                         resolve_callback, userdata ) == NULL )
 230         {
 231             msg_Err( p_sd, "failed to resolve service '%s': %s", name,
 232                      avahi_strerror( avahi_client_errno( p_sys->client ) ) );
 233         }
 234     }
 235     else
 236     {
 237         /** \todo Store the input id and search it, rather than searching the items */
 238         playlist_item_t *p_item;
 239         p_item = playlist_ChildSearchName( p_sys->p_node_cat, name );
 240         if( p_item == NULL )
 241             msg_Err( p_sd, "failed to find service '%s' in playlist", name );
 242         else
 243         {
 244             playlist_DeleteFromInput( p_sys->p_playlist, p_item->p_input->i_id,
 245                                       VLC_FALSE );
 246         }
 247     }
 248 }
 249
 250 /*****************************************************************************
 251  * Open: initialize and create stuff
 252  *****************************************************************************/
 253 static int Open( vlc_object_t *p_this )
 254 {
 255     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 256     services_discovery_sys_t *p_sys;
 257     int err;
 258
 259     p_sd->p_sys = p_sys = (services_discovery_sys_t *)malloc(
 260         sizeof( services_discovery_sys_t ) );
 261     if( p_sd->p_sys == NULL )
 262     {
 263         msg_Err( p_sd, "out of memory" );
 264         return VLC_EGENERIC;
 265     }
 266
 267     memset( p_sys, 0, sizeof(*p_sys) );
 268
 269     p_sys->simple_poll = avahi_simple_poll_new();
 270     if( p_sys->simple_poll == NULL )
 271     {
 272         msg_Err( p_sd, "failed to create avahi simple poll" );
 273         goto error;
 274     }
 275
 276     p_sys->client = avahi_client_new( avahi_simple_poll_get(p_sys->simple_poll),
 277 #ifdef HAVE_AVAHI_06
 278                                       0,
 279 #endif
 280                                       client_callback, p_sd, &err );
 281     if( p_sys->client == NULL )
 282     {
 283         msg_Err( p_sd, "failed to create avahi client: %s",
 284                  avahi_strerror( err ) );
 285         goto error;
 286     }
 287
 288     p_sys->sb = avahi_service_browser_new( p_sys->client, AVAHI_IF_UNSPEC,
 289                                            AVAHI_PROTO_UNSPEC,
 290                                            "_vlc-http._tcp", NULL,
 291 #ifdef HAVE_AVAHI_06
 292                                            0,
 293 #endif
 294                                            browse_callback, p_sd );
 295     if( p_sys->sb == NULL )
 296     {
 297         msg_Err( p_sd, "failed to create avahi service browser" );
 298         goto error;
 299     }
 300
 301     /* Create our playlist node */
 302     p_sys->p_playlist = (playlist_t *)vlc_object_find( p_sd,
 303                                                        VLC_OBJECT_PLAYLIST,
 304                                                        FIND_ANYWHERE );
 305     if( !p_sys->p_playlist )
 306     {
 307         msg_Warn( p_sd, "unable to find playlist, cancelling");
 308         goto error;
 309     }
 310
 311     p_sys->p_node_cat = playlist_NodeCreate( p_sys->p_playlist, _("Bonjour"),
 312                                        p_sys->p_playlist->p_root_category, 0 );
 313     p_sys->p_node_one = playlist_NodeCreate( p_sys->p_playlist, _("Bonjour"),
 314                                        p_sys->p_playlist->p_root_onelevel, 0 );
 315     p_sys->p_node_one->p_input->i_id = p_sys->p_node_cat->p_input->i_id;
 316
 317     p_sys->p_node_one->i_flags |= PLAYLIST_RO_FLAG;
 318     p_sys->p_node_cat->i_flags |= PLAYLIST_RO_FLAG;
 319     p_sys->p_node_one->i_flags |= PLAYLIST_SKIP_FLAG;
 320     p_sys->p_node_cat->i_flags |= PLAYLIST_SKIP_FLAG;
 321
 322     p_sd->pf_run = Run;
 323
 324     return VLC_SUCCESS;
 325
 326 error:
 327     if( p_sys->p_playlist != NULL )
 328         vlc_object_release( p_sys->p_playlist );
 329     if( p_sys->sb != NULL )
 330         avahi_service_browser_free( p_sys->sb );
 331     if( p_sys->client != NULL )
 332         avahi_client_free( p_sys->client );
 333     if( p_sys->simple_poll != NULL )
 334         avahi_simple_poll_free( p_sys->simple_poll );
 335
 336     free( (void *)p_sys );
 337
 338     return VLC_EGENERIC;
 339 }
 340
 341 /*****************************************************************************
 342  * Close: cleanup
 343  *****************************************************************************/
 344 static void Close( vlc_object_t *p_this )
 345 {
 346     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 347     services_discovery_sys_t *p_sys = p_sd->p_sys;
 348
 349     avahi_service_browser_free( p_sys->sb );
 350     avahi_client_free( p_sys->client );
 351     avahi_simple_poll_free( p_sys->simple_poll );
 352
 353     playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node_one, VLC_TRUE, VLC_TRUE );
 354     playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node_cat, VLC_TRUE, VLC_TRUE );
 355     vlc_object_release( p_sys->p_playlist );
 356
 357     free( p_sys );
 358 }
 359
 360 /*****************************************************************************
 361  * Run: main thread
 362  *****************************************************************************/
 363 static void Run( services_discovery_t *p_sd )
 364 {
 365     services_discovery_sys_t *p_sys = p_sd->p_sys;
 366
 367     while( !p_sd->b_die )
 368     {
 369         if( avahi_simple_poll_iterate( p_sys->simple_poll, 100 ) != 0 )
 370         {
 371             msg_Err( p_sd, "poll iterate failed" );
 372             break;
 373         }
 374     }
 375 }