Redefine vlc_dictionary_clear() and vlc_dictionary_remove_value_for_key() Allow passi...
[vlc.git] / modules / services_discovery / bonjour.c
1 /*****************************************************************************
2  * bonjour.c: Bonjour services discovery module
3  *****************************************************************************
4  * Copyright (C) 2005-2008 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
28 #ifdef HAVE_CONFIG_H
29 # include "config.h"
30 #endif
31
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
34 #include <vlc_playlist.h>
35 #include <vlc_arrays.h>
36
37 #include <avahi-client/client.h>
38 #include <avahi-client/publish.h>
39 #include <avahi-client/lookup.h>
40 #include <avahi-common/thread-watch.h>
41 #include <avahi-common/malloc.h>
42 #include <avahi-common/error.h>
43
44 /*****************************************************************************
45  * Module descriptor
46  *****************************************************************************/
47
48 /* Callbacks */
49     static int  Open ( vlc_object_t * );
50     static void Close( vlc_object_t * );
51
52 vlc_module_begin();
53     set_shortname( "Bonjour" );
54     set_description( N_("Bonjour services") );
55     set_category( CAT_PLAYLIST );
56     set_subcategory( SUBCAT_PLAYLIST_SD );
57     set_capability( "services_discovery", 0 );
58     set_callbacks( Open, Close );
59 vlc_module_end();
60
61 /*****************************************************************************
62  * Local structures
63  *****************************************************************************/
64
65 struct services_discovery_sys_t
66 {
67     AvahiThreadedPoll   *poll;
68     AvahiClient         *client;
69     AvahiServiceBrowser *sb;
70     vlc_dictionary_t    services_name_to_input_item;
71 };
72
73 /*****************************************************************************
74  * Local prototypes
75  *****************************************************************************/
76
77 /*****************************************************************************
78  * client_callback
79  *****************************************************************************/
80 static void client_callback( AvahiClient *c, AvahiClientState state,
81                              void * userdata )
82 {
83     services_discovery_t *p_sd = ( services_discovery_t* )userdata;
84     services_discovery_sys_t *p_sys = p_sd->p_sys;
85
86     if( state == AVAHI_CLIENT_FAILURE &&
87         (avahi_client_errno(c) == AVAHI_ERR_DISCONNECTED) )
88     {
89         msg_Err( p_sd, "avahi client disconnected" );
90         avahi_threaded_poll_quit( p_sys->poll );
91     }
92 }
93
94 /*****************************************************************************
95  * resolve_callback
96  *****************************************************************************/
97 static void resolve_callback(
98     AvahiServiceResolver *r,
99     AvahiIfIndex interface,
100     AvahiProtocol protocol,
101     AvahiResolverEvent event,
102     const char *name,
103     const char *type,
104     const char *domain,
105     const char *host_name,
106     const AvahiAddress *address,
107     uint16_t port,
108     AvahiStringList *txt,
109     AvahiLookupResultFlags flags,
110     void* userdata )
111 {
112     services_discovery_t *p_sd = ( services_discovery_t* )userdata;
113     services_discovery_sys_t *p_sys = p_sd->p_sys;
114     
115     VLC_UNUSED(interface); VLC_UNUSED(host_name);
116     VLC_UNUSED(flags);
117
118     if( event == AVAHI_RESOLVER_FAILURE )
119     {
120         msg_Err( p_sd,
121                  "failed to resolve service '%s' of type '%s' in domain '%s'",
122                  name, type, domain );
123     }
124     else if( event == AVAHI_RESOLVER_FOUND )
125     {
126         char a[128];
127         char *psz_uri = NULL;
128         char *psz_addr = NULL;
129         AvahiStringList *asl = NULL;
130         input_item_t *p_input = NULL;
131
132         msg_Dbg( p_sd, "service '%s' of type '%s' in domain '%s'",
133                  name, type, domain );
134
135         avahi_address_snprint(a, (sizeof(a)/sizeof(a[0]))-1, address);
136         if( protocol == AVAHI_PROTO_INET6 )
137             if( asprintf( &psz_addr, "[%s]", a ) == -1 )
138                 return;
139
140         if( txt != NULL )
141             asl = avahi_string_list_find( txt, "path" );
142         if( asl != NULL )
143         {
144             size_t size;
145             char *key = NULL;
146             char *value = NULL;
147             if( avahi_string_list_get_pair( asl, &key, &value, &size ) == 0 &&
148                 value != NULL )
149             {
150                 if( asprintf( &psz_uri, "http://%s:%d%s",
151                           psz_addr != NULL ? psz_addr : a, port, value ) == -1 )
152                 {
153                     free( psz_addr );
154                     return;
155                 }
156             }
157             if( key != NULL )
158                 avahi_free( (void *)key );
159             if( value != NULL )
160                 avahi_free( (void *)value );
161         }
162         else
163         {
164             if( asprintf( &psz_uri, "http://%s:%d",
165                       psz_addr != NULL ? psz_addr : a, port ) == -1 )
166             {
167                 free( psz_addr );
168                 return;
169             }
170         }
171
172         if( psz_addr != NULL )
173             free( (void *)psz_addr );
174
175         if( psz_uri != NULL )
176         {
177             p_input = input_item_NewExt( p_sd, psz_uri, name, 0, NULL, -1 );
178             free( (void *)psz_uri );
179         }
180         if( p_input != NULL )
181         {
182             vlc_dictionary_insert( &p_sys->services_name_to_input_item,
183                 name, p_input );
184             services_discovery_AddItem( p_sd, p_input, NULL /* no category */ );
185             vlc_gc_decref( p_input );
186        }
187     }
188
189     avahi_service_resolver_free( r );
190 }
191
192 /*****************************************************************************
193  * browser_callback
194  *****************************************************************************/
195 static void browse_callback(
196     AvahiServiceBrowser *b,
197     AvahiIfIndex interface,
198     AvahiProtocol protocol,
199     AvahiBrowserEvent event,
200     const char *name,
201     const char *type,
202     const char *domain,
203     AvahiLookupResultFlags flags,
204     void* userdata )
205 {
206     VLC_UNUSED(b);
207     VLC_UNUSED(flags);
208     services_discovery_t *p_sd = ( services_discovery_t* )userdata;
209     services_discovery_sys_t *p_sys = p_sd->p_sys;
210     if( event == AVAHI_BROWSER_NEW )
211     {
212         if( avahi_service_resolver_new( p_sys->client, interface, protocol,
213                                         name, type, domain, AVAHI_PROTO_UNSPEC,
214                                         0,
215                                         resolve_callback, userdata ) == NULL )
216         {
217             msg_Err( p_sd, "failed to resolve service '%s': %s", name,
218                      avahi_strerror( avahi_client_errno( p_sys->client ) ) );
219         }
220     }
221     else if( name )
222     {
223         /** \todo Store the input id and search it, rather than searching the items */
224         input_item_t *p_item;
225         p_item = vlc_dictionary_value_for_key(
226                         &p_sys->services_name_to_input_item,
227                         name );
228         if( !p_item )
229             msg_Err( p_sd, "failed to find service '%s' in playlist", name );
230         else
231         {
232             services_discovery_RemoveItem( p_sd, p_item );
233             vlc_dictionary_remove_value_for_key(
234                         &p_sys->services_name_to_input_item,
235                         name, NULL, NULL );
236         }
237     }
238 }
239
240 /*****************************************************************************
241  * Open: initialize and create stuff
242  *****************************************************************************/
243 static int Open( vlc_object_t *p_this )
244 {
245     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
246     services_discovery_sys_t *p_sys;
247     int err;
248
249     p_sd->p_sys = p_sys = (services_discovery_sys_t *)malloc(
250         sizeof( services_discovery_sys_t ) );
251
252     if( !p_sys )
253         return VLC_ENOMEM;
254
255     memset( p_sys, 0, sizeof(*p_sys) );
256
257     vlc_dictionary_init( &p_sys->services_name_to_input_item, 1 );
258
259     p_sys->poll = avahi_threaded_poll_new();
260     if( p_sys->poll == NULL )
261     {
262         msg_Err( p_sd, "failed to create Avahi threaded poll" );
263         goto error;
264     }
265
266     p_sys->client = avahi_client_new( avahi_threaded_poll_get(p_sys->poll),
267                                       0, client_callback, p_sd, &err );
268     if( p_sys->client == NULL )
269     {
270         msg_Err( p_sd, "failed to create avahi client: %s",
271                  avahi_strerror( err ) );
272         goto error;
273     }
274
275     p_sys->sb = avahi_service_browser_new( p_sys->client, AVAHI_IF_UNSPEC,
276                                            AVAHI_PROTO_UNSPEC,
277                                            "_vlc-http._tcp", NULL,
278                                            0, browse_callback, p_sd );
279     if( p_sys->sb == NULL )
280     {
281         msg_Err( p_sd, "failed to create avahi service browser" );
282         goto error;
283     }
284
285     services_discovery_SetLocalizedName( p_sd, _("Bonjour") );
286
287     return VLC_SUCCESS;
288
289 error:
290     if( p_sys->sb != NULL )
291         avahi_service_browser_free( p_sys->sb );
292     if( p_sys->client != NULL )
293         avahi_client_free( p_sys->client );
294     if( p_sys->poll != NULL )
295         avahi_threaded_poll_free( p_sys->poll );
296
297     vlc_dictionary_clear( &p_sys->services_name_to_input_item, NULL, NULL );
298     free( p_sys );
299
300     return VLC_EGENERIC;
301 }
302
303 /*****************************************************************************
304  * Close: cleanup
305  *****************************************************************************/
306 static void Close( vlc_object_t *p_this )
307 {
308     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
309     services_discovery_sys_t *p_sys = p_sd->p_sys;
310
311     avahi_service_browser_free( p_sys->sb );
312     avahi_client_free( p_sys->client );
313     avahi_threaded_poll_free( p_sys->poll );
314
315     vlc_dictionary_clear( &p_sys->services_name_to_input_item, NULL, NULL );
316     free( p_sys );
317 }