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_cat, *p_node_one;
  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         input_item_t *p_input = 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_input = input_ItemNewExt( p_sd, psz_uri, name, 0, NULL, -1 );
 179             free( (void *)psz_uri );
 180         }
 181         if( p_input != NULL )
 182         {
 183             playlist_item_t *p_item;
 184             p_item = playlist_NodeAddInput( p_sys->p_playlist, p_input,
 185                                             p_sys->p_node_cat,
 186                                             PLAYLIST_APPEND, PLAYLIST_END );
 187             p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
 188             p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
 189             p_item = playlist_NodeAddInput( p_sys->p_playlist, p_input,
 190                                             p_sys->p_node_one,
 191                                             PLAYLIST_APPEND, PLAYLIST_END );
 192             p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
 193             p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
 194        }
 195     }
 196
 197     avahi_service_resolver_free( r );
 198 }
 199
 200 /*****************************************************************************
 201  * browser_callback
 202  *****************************************************************************/
 203 static void browse_callback(
 204     AvahiServiceBrowser *b,
 205     AvahiIfIndex interface,
 206     AvahiProtocol protocol,
 207     AvahiBrowserEvent event,
 208     const char *name,
 209     const char *type,
 210     const char *domain,
 211 #ifdef HAVE_AVAHI_06
 212     AvahiLookupResultFlags flags,
 213 #endif
 214     void* userdata )
 215 {
 216     services_discovery_t *p_sd = ( services_discovery_t* )userdata;
 217     services_discovery_sys_t *p_sys = p_sd->p_sys;
 218
 219     if( event == AVAHI_BROWSER_NEW )
 220     {
 221         if( avahi_service_resolver_new( p_sys->client, interface, protocol,
 222                                         name, type, domain, AVAHI_PROTO_UNSPEC,
 223 #ifdef HAVE_AVAHI_06
 224                                         0,
 225 #endif
 226                                         resolve_callback, userdata ) == NULL )
 227         {
 228             msg_Err( p_sd, "failed to resolve service '%s': %s", name,
 229                      avahi_strerror( avahi_client_errno( p_sys->client ) ) );
 230         }
 231     }
 232     else
 233     {
 234         /** \todo Store the input id and search it, rather than searching the items */
 235         playlist_item_t *p_item;
 236         p_item = playlist_ChildSearchName( p_sys->p_node_cat, name );
 237         if( p_item == NULL )
 238             msg_Err( p_sd, "failed to find service '%s' in playlist", name );
 239         else
 240         {
 241             playlist_LockDeleteAllFromInput( p_sys->p_playlist,
 242                                               p_item->p_input->i_id );
 243         }
 244     }
 245 }
 246
 247 /*****************************************************************************
 248  * Open: initialize and create stuff
 249  *****************************************************************************/
 250 static int Open( vlc_object_t *p_this )
 251 {
 252     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 253     services_discovery_sys_t *p_sys;
 254     playlist_view_t *p_view;
 255     vlc_value_t val;
 256     int err;
 257
 258     p_sd->p_sys = p_sys = (services_discovery_sys_t *)malloc(
 259         sizeof( services_discovery_sys_t ) );
 260     if( p_sd->p_sys == NULL )
 261     {
 262         msg_Err( p_sd, "out of memory" );
 263         return VLC_EGENERIC;
 264     }
 265
 266     memset( p_sys, 0, sizeof(*p_sys) );
 267
 268     p_sys->simple_poll = avahi_simple_poll_new();
 269     if( p_sys->simple_poll == NULL )
 270     {
 271         msg_Err( p_sd, "failed to create avahi simple poll" );
 272         goto error;
 273     }
 274
 275     p_sys->client = avahi_client_new( avahi_simple_poll_get(p_sys->simple_poll),
 276 #ifdef HAVE_AVAHI_06
 277                                       0,
 278 #endif
 279                                       client_callback, p_sd, &err );
 280     if( p_sys->client == NULL )
 281     {
 282         msg_Err( p_sd, "failed to create avahi client: %s",
 283                  avahi_strerror( err ) );
 284         goto error;
 285     }
 286
 287     p_sys->sb = avahi_service_browser_new( p_sys->client, AVAHI_IF_UNSPEC,
 288                                            AVAHI_PROTO_UNSPEC,
 289                                            "_vlc-http._tcp", NULL,
 290 #ifdef HAVE_AVAHI_06
 291                                            0,
 292 #endif
 293                                            browse_callback, p_sd );
 294     if( p_sys->sb == NULL )
 295     {
 296         msg_Err( p_sd, "failed to create avahi service browser" );
 297         goto error;
 298     }
 299
 300     /* Create our playlist node */
 301     p_sys->p_playlist = (playlist_t *)vlc_object_find( p_sd,
 302                                                        VLC_OBJECT_PLAYLIST,
 303                                                        FIND_ANYWHERE );
 304     if( !p_sys->p_playlist )
 305     {
 306         msg_Warn( p_sd, "unable to find playlist, cancelling");
 307         goto error;
 308     }
 309
 310     playlist_NodesCreate( p_sys->p_playlist, _("Bonjour"),
 311                               &p_sys->p_node_cat,&p_sys->p_node_one,
 312                               VLC_TRUE );
 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_one, VLC_TRUE, VLC_TRUE );
 345     playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node_cat, VLC_TRUE, VLC_TRUE );
 346     vlc_object_release( p_sys->p_playlist );
 347
 348     free( p_sys );
 349 }
 350
 351 /*****************************************************************************
 352  * Run: main thread
 353  *****************************************************************************/
 354 static void Run( services_discovery_t *p_sd )
 355 {
 356     services_discovery_sys_t *p_sys = p_sd->p_sys;
 357
 358     while( !p_sd->b_die )
 359     {
 360         if( avahi_simple_poll_iterate( p_sys->simple_poll, 100 ) != 0 )
 361         {
 362             msg_Err( p_sd, "poll iterate failed" );
 363             break;
 364         }
 365     }
 366 }