aboutsummaryrefslogtreecommitdiff
path: root/src/bluez.vala
blob: b3d96ddb51f8405e65a88cea76ff1ee80e2d17ab (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
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
/*
 * 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>
 *   Robert Ancell <robert.ancell@canonical.com>
 */


/**
 * Bluetooth implementaion which uses org.bluez on DBus
 */
public class Bluez: Bluetooth, Object
{
  uint name_watch_id = 0;
  uint next_device_id = 1;
  ObjectManager manager;
  static const string BLUEZ_BUSNAME = "org.bluez";

  private bool _powered = false;

  private bool powered {
    get { return _powered; }
    set { _powered = value; update_enabled(); }
  }

  private KillSwitch killswitch = new RfKillSwitch ();

  private DBusConnection bus = null;

  /* maps an org.bluez.Adapter1's object_path to the BluezAdapter proxy */
  private HashTable<ObjectPath,BluezAdapter> path_to_adapter_proxy;

  /* maps an org.bluez.Device1's object_path to the BluezDevice proxy */
  private HashTable<ObjectPath,BluezDevice> path_to_device_proxy;

  /* maps an org.bluez.Device1's object_path to our arbitrary unique id */
  private HashTable<ObjectPath,uint> path_to_id;

  /* maps our arbitrary unique id to an org.bluez.Device's object path */
  private HashTable<uint,ObjectPath> id_to_path;

  /* maps our arbitrary unique id to a Bluetooth.Device struct for public consumption */
  private HashTable<uint,Device> id_to_device;

  public Bluez (KillSwitch? killswitch)
  {
    if ((killswitch != null) && (killswitch.is_valid()))
      {
        this.killswitch = killswitch;
        killswitch.notify["blocked"].connect (() => update_enabled());
        update_enabled ();
      }

    name_watch_id = Bus.watch_name(BusType.SYSTEM,
                                   BLUEZ_BUSNAME,
                                   BusNameWatcherFlags.AUTO_START,
                                   on_bluez_appeared,
                                   on_bluez_vanished);
  }

  ~Bluez()
  {
    Bus.unwatch_name(name_watch_id);
  }

  private void on_bluez_appeared (GLib.DBusConnection connection, string name, string name_owner)
  {
    debug(@"name $name owned by $name_owner, setting up bluez proxies");

    bus = connection;

    reset_bluez_lookup_vars();
    reset_manager();
  }

  private void on_bluez_vanished (GLib.DBusConnection connection, string name)
  {
    reset_bluez_lookup_vars();
  }

  private void reset_bluez_lookup_vars ()
  {
    id_to_path = new HashTable<uint,ObjectPath> (direct_hash, direct_equal);
    id_to_device = new HashTable<uint,Device> (direct_hash, direct_equal);
    path_to_id = new HashTable<ObjectPath,uint> (str_hash, str_equal);
    path_to_adapter_proxy = new HashTable<ObjectPath,BluezAdapter> (str_hash, str_equal);
    path_to_device_proxy = new HashTable<ObjectPath,BluezDevice> (str_hash, str_equal);
  }

  private void reset_manager()
  {
    try
      {
        manager = bus.get_proxy_sync (BLUEZ_BUSNAME, "/");

        // Find the adapters and watch for changes
        manager.interfaces_added.connect ((object_path, interfaces_and_properties) => {
          var iter = HashTableIter<string, HashTable<string, Variant>> (interfaces_and_properties);
          string name;
          while (iter.next (out name, null))
            {
              if (name == "org.bluez.Adapter1")
                update_adapter (object_path);
              if (name == "org.bluez.Device1")
                update_device (object_path);
            }
        });
        manager.interfaces_removed.connect ((object_path, interfaces) => {
            foreach (var interface in interfaces) {
              if (interface == "org.bluez.Adapter1")
                adapter_removed (object_path);
              if (interface == "org.bluez.Device1")
                device_removed (object_path);
            }
        });
        var objects = manager.get_managed_objects ();
        var object_iter = HashTableIter<ObjectPath, HashTable<string, HashTable<string, Variant>>> (objects);
        ObjectPath object_path;
        HashTable<string, HashTable<string, Variant>> interfaces_and_properties;
        while (object_iter.next (out object_path, out interfaces_and_properties))
          {
            var iter = HashTableIter<string, HashTable<string, Variant>> (interfaces_and_properties);
            string name;
            while (iter.next (out name, null)) {
              if (name == "org.bluez.Adapter1")
                update_adapter (object_path);
              if (name == "org.bluez.Device1")
                update_device (object_path);
            }
          }
      }
    catch (Error e)
      {
        critical (@"$(e.message)");
      }
  }

  ////
  ////  Adapter Upkeep
  ////

  private void update_adapter (ObjectPath object_path)
  {
    debug(@"bluez5 calling update_adapter for $object_path");

    // Create a proxy if we don't have one
    var adapter_proxy = path_to_adapter_proxy.lookup (object_path);
    if (adapter_proxy == null)
      {
        try {
          adapter_proxy = bus.get_proxy_sync (BLUEZ_BUSNAME, object_path);
        } catch (Error e) {
          critical (@"$(e.message)");
          return;
        }
        path_to_adapter_proxy.insert (object_path, adapter_proxy);
        adapter_proxy.g_properties_changed.connect(() => update_adapter (object_path));
      }

    update_combined_adapter_state ();
  }

  private void adapter_removed (ObjectPath object_path)
  {
    path_to_adapter_proxy.remove (object_path);
    update_combined_adapter_state ();
  }

  private void update_combined_adapter_state ()
  {
    var is_discoverable = false;
    var is_powered = false;
    var is_supported = false;

    var iter = HashTableIter<ObjectPath,BluezAdapter> (path_to_adapter_proxy);
    BluezAdapter adapter_proxy;
    while (iter.next (null, out adapter_proxy))
      {
        var v = adapter_proxy.get_cached_property ("Discoverable");
        if (!is_discoverable)
          is_discoverable = (v != null) && v.get_boolean ();

        v = adapter_proxy.get_cached_property ("Powered");
        if (!is_powered)
          is_powered = (v != null) && v.get_boolean ();

        is_supported = true;
      }

    discoverable = is_discoverable;
    powered = is_powered;
    supported = is_supported;
  }

  ////
  ////  bluetooth device UUIDs
  ////

  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 (var 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 (var uuid16 in uuids)
      if (uuid16 == 0x1106) // OBEXFileTransfer
        return true;

    return false;
  }

  ////
  ////  Device Upkeep
  ////

  /* Update our public Device struct from the org.bluez.Device's properties.
   *
   * This is called when we first walk through bluez' Devices on startup,
   * when the org.bluez.Adapter gets a new device,
   * and when a device's properties change s.t. we need to rebuild the proxy.
   */
  private void update_device (ObjectPath object_path)
  {
    debug(@"bluez5 calling update_device for $object_path");

    // Create a proxy if we don't have one
    var device_proxy = path_to_device_proxy.lookup (object_path);
    if (device_proxy == null)
      {
        try {
          device_proxy = bus.get_proxy_sync (BLUEZ_BUSNAME, object_path);
        } catch (Error e) {
          critical (@"$(e.message)");
          return;
        }

        path_to_device_proxy.insert (object_path, device_proxy);
        device_proxy.g_properties_changed.connect(() => update_device (object_path));
      }

    // look up our id for this device.
    // if we don't have one yet, create one.
    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 = device_proxy.get_cached_property ("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 = device_proxy.get_cached_property ("Alias");
    if (v == null)
      v = device_proxy.get_cached_property ("Name");
    var name = v == null ? _("Unknown") : v.get_string ();

    // look up the device's bus address
    v = device_proxy.get_cached_property ("Address");
    var address = v == null ? null : v.get_string ();

    // look up the device's bus address
    v = device_proxy.get_cached_property ("Icon");
    var icon = new ThemedIcon (v != null ? v.get_string() : "unknown");

    // look up the device's Connected flag
    v = device_proxy.get_cached_property ("Connected");
    var is_connected = (v != null) && v.get_boolean ();

    // derive the uuid-related attributes we care about
    v = device_proxy.get_cached_property ("UUIDs");
    uint16[] uuids = {};
    if (v != null)
    {
        string[] uuid_strings = v.dup_strv ();
        foreach (var 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);

    id_to_device.insert (id, new Device (id,
                                         type,
                                         name,
                                         address,
                                         icon,
                                         true,
                                         is_connected,
                                         supports_browsing,
                                         supports_file_transfer));

    devices_changed ();
    update_connected ();
  }

  private void device_removed (ObjectPath 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 ();
  }

  /* update the 'enabled' property by looking at the killswitch state
     and the 'powered' property state */
  void update_enabled ()
  {
    var blocked = (killswitch != null) && killswitch.blocked;
    debug (@"in upate_enabled, powered is $powered, blocked is $blocked");
    enabled = powered && !blocked;
  }

  private bool have_connected_device ()
  {
    var devices = get_devices();

    foreach (var device in devices)
      if (device.is_connected)
        return true;

    return false;
  }

  private void update_connected ()
  {
    connected = have_connected_device ();
  }

  ////
  ////  Public API
  ////

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

    if ((device != null)
        && (device.is_connected != connected))
      {
        try
          {
            if (connected)
              proxy.connect_ ();
            else
              proxy.disconnect_ ();
          }
        catch (Error e)
          {
            debug (@"$path org.bluez.Device1 connect/disconnect failed: $(e.message)");
          }

        update_connected ();
      }
  }

  public void try_set_discoverable (bool b)
  {
    if (discoverable != b)
      {
        var iter = HashTableIter<ObjectPath,BluezAdapter> (path_to_adapter_proxy);
        ObjectPath object_path;
        BluezAdapter adapter_proxy;
        while (iter.next (out object_path, out adapter_proxy))
          adapter_proxy.call.begin ("org.freedesktop.DBus.Properties.Set",
                                    new Variant ("(ssv)", "org.bluez.Adapter1", "Discoverable", new Variant.boolean (b)),
                                    DBusCallFlags.NONE, -1);
      }
  }

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

  public bool supported { get; protected set; default = false; }
  public bool discoverable { get; protected set; default = false; }
  public bool enabled { get; protected set; default = false; }
  public bool connected { get; protected set; default = false; }

  public void try_set_enabled (bool b)
  {
    if (killswitch != null)
      {
        debug (@"setting killswitch blocked to $(!b)");
        killswitch.try_set_blocked (!b);
      }
    else
      {
        var iter = HashTableIter<ObjectPath,BluezAdapter> (path_to_adapter_proxy);
        ObjectPath object_path;
        BluezAdapter adapter_proxy;
        while (iter.next (out object_path, out adapter_proxy))
          adapter_proxy.call.begin ("org.freedesktop.DBus.Properties.Set",
                                    new Variant ("(ssv)", "org.bluez.Adapter1", "Powered", new Variant.boolean (b)),
                                    DBusCallFlags.NONE, -1);
      }
  }
}

[DBus (name = "org.freedesktop.DBus.ObjectManager")]
private interface ObjectManager : Object {
  [DBus (name = "GetManagedObjects")]
  public abstract HashTable<ObjectPath, HashTable<string, HashTable<string, Variant>>> get_managed_objects() throws DBusError, IOError;

  [DBus (name = "InterfacesAdded")]
  public signal void interfaces_added(ObjectPath object_path, HashTable<string, HashTable<string, Variant>> interfaces_and_properties);

  [DBus (name = "InterfacesRemoved")]
  public signal void interfaces_removed(ObjectPath object_path, string[] interfaces);
}

[DBus (name = "org.bluez.Adapter1")]
private interface BluezAdapter : DBusProxy {
}

[DBus (name = "org.bluez.Device1")]
private interface BluezDevice : DBusProxy {
  [DBus (name = "Connect")]
  public abstract void connect_() throws DBusError, IOError;

  [DBus (name = "Disconnect")]
  public abstract void disconnect_() throws DBusError, IOError;
}