aboutsummaryrefslogtreecommitdiff
path: root/src/bluez.vala
blob: fa4b9eaa4f1de8359a543538e17064d59297f470 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
/*
 * Copyright 2013 Canonical Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 3.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Authors:
 *   Charles Kerr <charles.kerr@canonical.com>
 */

/**
 * Bluetooth implementaion which uses org.bluez on DBus 
 */
public class Bluez: KillswitchBluetooth
{
  private org.bluez.Manager manager;
  private org.bluez.Adapter default_adapter;
  private HashTable<string,org.bluez.Device> path_to_proxy;
  private HashTable<string,uint> path_to_id;
  private HashTable<uint,string> id_to_path;
  private HashTable<uint,Device> id_to_device;
  private uint next_device_id = 1;

  public Bluez (KillSwitch killswitch)
  {
    base (killswitch);

    string adapter_path = null;

    id_to_path    = new HashTable<uint,string> (direct_hash, direct_equal);
    id_to_device  = new HashTable<uint,Device> (direct_hash, direct_equal);
    path_to_id    = new HashTable<string,uint> (str_hash, str_equal);
    path_to_proxy = new HashTable<string,org.bluez.Device> (str_hash, str_equal);

    try
      {
        manager = Bus.get_proxy_sync (BusType.SYSTEM, "org.bluez", "/");
        manager.default_adapter_changed.connect ((object_path) => on_default_adapter_changed (object_path));
        adapter_path = manager.default_adapter ();
      }
    catch (Error e)
      {
        critical (@"$(e.message)");
      }

    on_default_adapter_changed (adapter_path);
  }

  private void on_default_adapter_changed (string? object_path)
  {
    if (object_path != null) try
      {
        debug (@"using default adapter at $object_path");
        default_adapter = Bus.get_proxy_sync (BusType.SYSTEM, "org.bluez", object_path);
        default_adapter.property_changed.connect(() => on_default_adapter_properties_changed());

        default_adapter.device_removed.connect((adapter, path) => {
          var id = path_to_id.lookup (path);
          path_to_id.remove (path);
          id_to_path.remove (id);
          id_to_device.remove (id);
          devices_changed ();
        });

        default_adapter.device_created.connect((adapter, path) => add_device (path));
        foreach (string device_path in default_adapter.list_devices())
          add_device (device_path);
      }
    catch (Error e)
     {
       critical (@"$(e.message)");
     }

    this.on_default_adapter_properties_changed ();
  }

  private static uint16 get_uuid16_from_uuid_string (string uuid)
  {
    uint16 uuid16;

    string[] tokens = uuid.split ("-", 1);
    if (tokens.length > 0)
      uuid16 = (uint16) uint64.parse ("0x"+tokens[0]);
    else
      uuid16 = 0;

    return uuid16;
  }

  /* A device supports file transfer if OBEXObjectPush is in its uuid list */
  private bool device_supports_file_transfer (uint16[] uuids)
  {
    foreach (uint16 uuid16 in uuids)
      if (uuid16 == 0x1105) // OBEXObjectPush
        return true;

    return false;
  }

  /* A device supports browsing if OBEXFileTransfer is in its uuid list */
  private bool device_supports_browsing (uint16[] uuids)
  {
    foreach (uint16 uuid16 in uuids)
      if (uuid16 == 0x1106) // OBEXFileTransfer
        return true;

    return false;
  }

  /* headsets, audio sinks, and input devices are connectable.
   *
   * TODO: this duplicates the behavior of the indicator from when it used
   * gnome-bluetooth as a backend. Are there other interfaces we care about? */
  private DBusInterfaceInfo[] get_connectable_interfaces (DBusProxy device)
  {
    DBusInterfaceInfo[] connectable_interfaces = {};

    try
      {
        var iname = "org.freedesktop.DBus.Introspectable.Introspect";
        var intro = device.call_sync (iname, null, DBusCallFlags.NONE, -1);

        if ((intro != null) && (intro.n_children() > 0))
          {
            string xml = intro.get_child_value(0).get_string();
            var info = new DBusNodeInfo.for_xml (xml);
            if (info != null)
              {
                foreach (DBusInterfaceInfo i in info.interfaces)
                  {
                    if ((i.name == "org.bluez.AudioSink") ||
                        (i.name == "org.bluez.Headset") ||
                        (i.name == "org.bluez.Input"))
                      {
                        connectable_interfaces += i;
                      }
                  }
              }
          }
      }
    catch (Error e)
      {
       critical (@"$(e.message)");
      }

    return connectable_interfaces;
  }

  private bool device_is_connectable (DBusProxy device)
  {
    var connectable_interfaces = get_connectable_interfaces (device);
    return connectable_interfaces.length > 0;
  }

  private void device_connect (DBusProxy proxy)
  {
    var connection = proxy.get_connection ();
    var object_path = proxy.get_object_path ();

    foreach (var i in get_connectable_interfaces (proxy))
      {
        try
          {
            debug (@"trying to connect to $object_path: $(i.name)");
            connection.call_sync ("org.bluez",
                                  object_path,
                                  i.name,
                                  "Connect",
                                  null,
                                  null,
                                  DBusCallFlags.NONE,
                                  -1);
          }
        catch (Error e)
          {
            debug (@"Unable to call $(i.name).Connect() on $(proxy.get_object_path()): $(e.message)");
          }
      }
  }

  private void add_device (string object_path)
  {
    if (!path_to_proxy.contains (object_path))
      {
        try
          {
            org.bluez.Device device = Bus.get_proxy_sync (BusType.SYSTEM, "org.bluez", object_path);
            path_to_proxy.insert (object_path, device);
            device.property_changed.connect(() => update_device (device)); 
            update_device (device);
          }
        catch (Error e)
          {
            critical (@"$(e.message)");
          }
      }
  }

  private void update_device (org.bluez.Device device_proxy)
  {
    HashTable<string, GLib.Variant> properties;

    try {
      properties = device_proxy.get_properties ();
    } catch (Error e) {
      critical (@"$(e.message)");
      return;
    }

    // look up our id for this device.
    // if we don't have one yet, create one.
    var object_path = (device_proxy as DBusProxy).get_object_path();
    var id = path_to_id.lookup (object_path);
    if (id == 0)
      {
        id = next_device_id ++;
        id_to_path.insert (id, object_path);
        path_to_id.insert (object_path, id);
      }

    // look up the device's type
    Device.Type type;
    var v = properties.lookup ("Class");
    if (v == null)
      type = Device.Type.OTHER;
    else 
      type = Device.class_to_device_type (v.get_uint32());

    // look up the device's human-readable name
    v = properties.lookup ("Alias");
    if (v == null)
      v = properties.lookup ("Name");
    string name = v == null ? _("Unknown") : v.get_string ();

    // look up the device's bus address
    v = properties.lookup ("Address");
    string address = v.get_string ();

    // look up the device's bus address
    Icon icon;
    v = properties.lookup ("Icon");
    if (v == null)
      icon = new ThemedIcon ("unknown");
    else
      icon = new ThemedIcon (v.get_string());

    // derive a Connectable flag for this device
    var is_connectable = device_is_connectable (device_proxy as DBusProxy);

    // look up the device's Connected flag
    v = properties.lookup ("Connected");
    bool is_connected = (v != null) && v.get_boolean ();

    // derive the uuid-related attributes we care about
    v = properties.lookup ("UUIDs");
    string[] uuid_strings = v.dup_strv ();
    uint16[] uuids = {};
    foreach (string s in uuid_strings)
      uuids += get_uuid16_from_uuid_string (s);
    var supports_browsing = device_supports_browsing (uuids);
    var supports_file_transfer = device_supports_file_transfer (uuids);

    // update our lookup table with these new attributes
    id_to_device.insert (id, new Device (id,
                                         type,
                                         name,
                                         address,
                                         icon,
                                         is_connectable,
                                         is_connected,
                                         supports_browsing,
                                         supports_file_transfer));

    devices_changed ();
  }

  public override void set_device_connected (uint id, bool connected)
  {
    var device = id_to_device.lookup (id);
    var object_path = id_to_path.lookup (id);
    var proxy = (object_path != null) ? path_to_proxy.lookup (object_path) : null;

    if ((proxy != null) && (device != null) && (device.is_connected != connected))
      {
        if (connected)
          {
            device_connect (proxy as DBusProxy);
          }
        else // disconnect
          {
            try
              {
                proxy.disconnect ();
              }
            catch (Error e)
              {
                critical (@"Unable to disconnect $object_path: $(e.message)");
              }
          }
      }
  }

  private void on_default_adapter_properties_changed ()
  {
    bool is_discoverable = false;
    bool is_powered = false;

    if (this.default_adapter != null) try
      {
        var properties = this.default_adapter.get_properties();

        var v = properties.lookup("Discoverable");
        is_discoverable = (v != null) && v.get_boolean ();

        v = properties.lookup("Powered");
        is_powered = (v != null) && v.get_boolean ();
      }
    catch (Error e) 
     {
       critical (@"$(e.message)");
     }

    this.powered = is_powered;
    this.discoverable = is_discoverable;
  }

  public override void try_set_discoverable (bool b)
  {
    if (discoverable != b) try
      {
        this.default_adapter.set_property ("Discoverable", new Variant.boolean(b));
      }
    catch (Error e)
      {
        critical (@"$(e.message)");
      }
  }

  public override List<unowned Device> get_devices ()
  {
    return id_to_device.get_values();
  }
}