RemoteDevices.java revision ede67c26e7b2564ea35db6d9b3027a269c150e13 
1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.bluetooth.btservice;
18
19import android.bluetooth.BluetoothAdapter;
20import android.bluetooth.BluetoothClass;
21import android.bluetooth.BluetoothDevice;
22import android.content.Context;
23import android.content.Intent;
24import android.os.Handler;
25import android.os.Message;
26import android.os.ParcelUuid;
27import android.util.Log;
28
29import com.android.bluetooth.Utils;
30import com.android.bluetooth.btservice.RemoteDevices.DeviceProperties;
31
32import java.util.ArrayList;
33import java.util.HashMap;
34import java.util.LinkedList;
35
36
37final class RemoteDevices {
38    private static final boolean DBG = false;
39    private static final String TAG = "BluetoothRemoteDevices";
40
41
42    private static BluetoothAdapter mAdapter;
43    private static AdapterService mAdapterService;
44    private static ArrayList<BluetoothDevice> mSdpTracker;
45
46    private Object mObject = new Object();
47
48    private static final int UUID_INTENT_DELAY = 6000;
49    private static final int MESSAGE_UUID_INTENT = 1;
50
51    private HashMap<BluetoothDevice, DeviceProperties> mDevices;
52
53    RemoteDevices(AdapterService service) {
54        mAdapter = BluetoothAdapter.getDefaultAdapter();
55        mAdapterService = service;
56        mSdpTracker = new ArrayList<BluetoothDevice>();
57        mDevices = new HashMap<BluetoothDevice, DeviceProperties>();
58    }
59
60
61    void cleanup() {
62        if (mSdpTracker !=null)
63            mSdpTracker.clear();
64
65        if (mDevices != null)
66            mDevices.clear();
67    }
68
69    public Object Clone() throws CloneNotSupportedException {
70        throw new CloneNotSupportedException();
71    }
72
73    DeviceProperties getDeviceProperties(BluetoothDevice device) {
74        synchronized (mDevices) {
75            return mDevices.get(device);
76        }
77    }
78
79    BluetoothDevice getDevice(byte[] address) {
80        for (BluetoothDevice dev : mDevices.keySet()) {
81            if (dev.getAddress().equals(Utils.getAddressStringFromByte(address))) {
82                return dev;
83            }
84        }
85        return null;
86    }
87
88    DeviceProperties addDeviceProperties(byte[] address) {
89        synchronized (mDevices) {
90            DeviceProperties prop = new DeviceProperties();
91            BluetoothDevice device =
92                    mAdapter.getRemoteDevice(Utils.getAddressStringFromByte(address));
93            prop.mAddress = address;
94            mDevices.put(device, prop);
95            return prop;
96        }
97    }
98
99    class DeviceProperties {
100        private String mName;
101        private byte[] mAddress;
102        private int mBluetoothClass;
103        private short mRssi;
104        private ParcelUuid[] mUuids;
105        private int mDeviceType;
106        private String mAlias;
107        private int mBondState;
108
109        DeviceProperties() {
110            mBondState = BluetoothDevice.BOND_NONE;
111        }
112
113        /**
114         * @return the mName
115         */
116        String getName() {
117            synchronized (mObject) {
118                return mName;
119            }
120        }
121
122        /**
123         * @return the mClass
124         */
125        int getBluetoothClass() {
126            synchronized (mObject) {
127                return mBluetoothClass;
128            }
129        }
130
131        /**
132         * @return the mUuids
133         */
134        ParcelUuid[] getUuids() {
135            synchronized (mObject) {
136                return mUuids;
137            }
138        }
139
140        /**
141         * @return the mAddress
142         */
143        byte[] getAddress() {
144            synchronized (mObject) {
145                return mAddress;
146            }
147        }
148
149        /**
150         * @return mRssi
151         */
152        short getRssi() {
153            synchronized (mObject) {
154                return mRssi;
155            }
156        }
157
158        /**
159         *
160         * @return mDeviceType
161         */
162        int getDeviceType() {
163            synchronized (mObject) {
164                return mDeviceType;
165            }
166        }
167
168        /**
169         * @return the mAlias
170         */
171        String getAlias() {
172            synchronized (mObject) {
173                return mAlias;
174            }
175        }
176
177        /**
178         * @param mAlias the mAlias to set
179         */
180        void setAlias(String mAlias) {
181            synchronized (mObject) {
182                mAdapterService.setDevicePropertyNative(mAddress,
183                    AbstractionLayer.BT_PROPERTY_REMOTE_FRIENDLY_NAME, mAlias.getBytes());
184            }
185        }
186
187        /**
188         * @param mBondState the mBondState to set
189         */
190        void setBondState(int mBondState) {
191            synchronized (mObject) {
192                this.mBondState = mBondState;
193                if (mBondState == BluetoothDevice.BOND_NONE)
194                {
195                    /* Clearing the Uuids local copy when the device is unpaired. If not cleared,
196                    cachedBluetoothDevice issued a connect using the local cached copy of uuids,
197                    without waiting for the ACTION_UUID intent.
198                    This was resulting in multiple calls to connect().*/
199                    mUuids = null;
200                }
201            }
202        }
203
204        /**
205         * @return the mBondState
206         */
207        int getBondState() {
208            synchronized (mObject) {
209                return mBondState;
210            }
211        }
212    }
213
214
215    private void sendUuidIntent(BluetoothDevice device) {
216        DeviceProperties prop = getDeviceProperties(device);
217        Intent intent = new Intent(BluetoothDevice.ACTION_UUID);
218        intent.putExtra(BluetoothDevice.EXTRA_DEVICE, device);
219        intent.putExtra(BluetoothDevice.EXTRA_UUID, prop == null? null: prop.mUuids);
220        mAdapterService.sendBroadcast(intent, AdapterService.BLUETOOTH_ADMIN_PERM);
221
222        //Remove the outstanding UUID request
223        mSdpTracker.remove(device);
224    }
225
226    private void sendDisplayPinIntent(byte[] address, int pin) {
227        Intent intent = new Intent(BluetoothDevice.ACTION_PAIRING_REQUEST);
228        intent.putExtra(BluetoothDevice.EXTRA_DEVICE, getDevice(address));
229        intent.putExtra(BluetoothDevice.EXTRA_PAIRING_KEY, pin);
230        intent.putExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT,
231                    BluetoothDevice.PAIRING_VARIANT_DISPLAY_PIN);
232        mAdapterService.sendBroadcast(intent, mAdapterService.BLUETOOTH_ADMIN_PERM);
233    }
234
235    void devicePropertyChangedCallback(byte[] address, int[] types, byte[][] values) {
236        Intent intent;
237        byte[] val;
238        int type;
239        BluetoothDevice bdDevice = getDevice(address);
240        DeviceProperties device;
241        if (bdDevice == null) {
242            device = addDeviceProperties(address);
243            bdDevice = getDevice(address);
244        } else {
245            device = getDeviceProperties(bdDevice);
246        }
247
248        for (int j = 0; j < types.length; j++) {
249            type = types[j];
250            val = values[j];
251            if(val.length <= 0)
252                errorLog("devicePropertyChangedCallback: bdDevice: " + bdDevice + ", value is empty for type: " + type);
253            else {
254                synchronized(mObject) {
255                    switch (type) {
256                        case AbstractionLayer.BT_PROPERTY_BDNAME:
257                            device.mName = new String(val);
258                            intent = new Intent(BluetoothDevice.ACTION_NAME_CHANGED);
259                            intent.putExtra(BluetoothDevice.EXTRA_DEVICE, bdDevice);
260                            intent.putExtra(BluetoothDevice.EXTRA_NAME, device.mName);
261                            intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
262                            mAdapterService.sendBroadcast(intent, mAdapterService.BLUETOOTH_PERM);
263                            debugLog("Remote Device name is: " + device.mName);
264                            break;
265                        case AbstractionLayer.BT_PROPERTY_REMOTE_FRIENDLY_NAME:
266                            if (device.mAlias != null) {
267                                System.arraycopy(val, 0, device.mAlias, 0, val.length);
268                            }
269                            else {
270                                device.mAlias = new String(val);
271                            }
272                            break;
273                        case AbstractionLayer.BT_PROPERTY_BDADDR:
274                            device.mAddress = val;
275                            debugLog("Remote Address is:" + Utils.getAddressStringFromByte(val));
276                            break;
277                        case AbstractionLayer.BT_PROPERTY_CLASS_OF_DEVICE:
278                            device.mBluetoothClass =  Utils.byteArrayToInt(val);
279                            intent = new Intent(BluetoothDevice.ACTION_CLASS_CHANGED);
280                            intent.putExtra(BluetoothDevice.EXTRA_DEVICE, bdDevice);
281                            intent.putExtra(BluetoothDevice.EXTRA_CLASS,
282                                    new BluetoothClass(device.mBluetoothClass));
283                            intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
284                            mAdapterService.sendBroadcast(intent, mAdapterService.BLUETOOTH_PERM);
285                            debugLog("Remote class is:" + device.mBluetoothClass);
286                            break;
287                        case AbstractionLayer.BT_PROPERTY_UUIDS:
288                            int numUuids = val.length/AbstractionLayer.BT_UUID_SIZE;
289                            device.mUuids = Utils.byteArrayToUuid(val);
290                            sendUuidIntent(bdDevice);
291                            break;
292                        case AbstractionLayer.BT_PROPERTY_TYPE_OF_DEVICE:
293                            device.mDeviceType = Utils.byteArrayToInt(val);
294                            break;
295                        case AbstractionLayer.BT_PROPERTY_REMOTE_RSSI:
296                            device.mRssi = Utils.byteArrayToShort(val);
297                            break;
298                    }
299                }
300            }
301        }
302    }
303
304    void deviceFoundCallback(byte[] address) {
305        // The device properties are already registered - we can send the intent
306        // now
307        BluetoothDevice device = getDevice(address);
308        debugLog("deviceFoundCallback: Remote Address is:" + device);
309        DeviceProperties deviceProp = getDeviceProperties(device);
310        if (deviceProp == null) {
311            errorLog("Device Properties is null for Device:" + device);
312            return;
313        }
314
315        Intent intent = new Intent(BluetoothDevice.ACTION_FOUND);
316        intent.putExtra(BluetoothDevice.EXTRA_DEVICE, device);
317        intent.putExtra(BluetoothDevice.EXTRA_CLASS,
318                new BluetoothClass(Integer.valueOf(deviceProp.mBluetoothClass)));
319        intent.putExtra(BluetoothDevice.EXTRA_RSSI, deviceProp.mRssi);
320        intent.putExtra(BluetoothDevice.EXTRA_NAME, deviceProp.mName);
321
322        mAdapterService.sendBroadcast(intent, mAdapterService.BLUETOOTH_PERM);
323    }
324
325    void pinRequestCallback(byte[] address, byte[] name, int cod) {
326        //TODO(BT): Get wakelock and update name and cod
327        BluetoothDevice bdDevice = getDevice(address);
328        if (bdDevice == null) {
329            addDeviceProperties(address);
330        }
331        BluetoothClass btClass = bdDevice.getBluetoothClass();
332        int btDeviceClass = btClass.getDeviceClass();
333        if (btDeviceClass == BluetoothClass.Device.PERIPHERAL_KEYBOARD ||
334            btDeviceClass == BluetoothClass.Device.PERIPHERAL_KEYBOARD_POINTING) {
335            // Its a keyboard. Follow the HID spec recommendation of creating the
336            // passkey and displaying it to the user. If the keyboard doesn't follow
337            // the spec recommendation, check if the keyboard has a fixed PIN zero
338            // and pair.
339            //TODO: Add sFixedPinZerosAutoPairKeyboard() and maintain list of devices that have fixed pin
340            /*if (mAdapterService.isFixedPinZerosAutoPairKeyboard(address)) {
341                               mAdapterService.setPin(address, BluetoothDevice.convertPinToBytes("0000"));
342                               return;
343                     }*/
344            // Generate a variable PIN. This is not truly random but good enough.
345            int pin = (int) Math.floor(Math.random() * 1000000);
346            sendDisplayPinIntent(address, pin);
347            return;
348        }
349        infoLog("pinRequestCallback: " + address + " name:" + name + " cod:" +
350                cod);
351        Intent intent = new Intent(BluetoothDevice.ACTION_PAIRING_REQUEST);
352        intent.putExtra(BluetoothDevice.EXTRA_DEVICE, getDevice(address));
353        intent.putExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT,
354                BluetoothDevice.PAIRING_VARIANT_PIN);
355        mAdapterService.sendBroadcast(intent, mAdapterService.BLUETOOTH_ADMIN_PERM);
356        return;
357    }
358
359    void sspRequestCallback(byte[] address, byte[] name, int cod, int pairingVariant,
360            int passkey) {
361        //TODO(BT): Get wakelock and update name and cod
362        BluetoothDevice bdDevice = getDevice(address);
363        if (bdDevice == null) {
364            addDeviceProperties(address);
365        }
366
367        infoLog("sspRequestCallback: " + address + " name: " + name + " cod: " +
368                cod + " pairingVariant " + pairingVariant + " passkey: " + passkey);
369        int variant;
370        boolean displayPasskey = false;
371        if (pairingVariant == AbstractionLayer.BT_SSP_VARIANT_PASSKEY_CONFIRMATION) {
372            variant = BluetoothDevice.PAIRING_VARIANT_PASSKEY_CONFIRMATION;
373            displayPasskey = true;
374        } else if (pairingVariant == AbstractionLayer.BT_SSP_VARIANT_CONSENT) {
375            variant = BluetoothDevice.PAIRING_VARIANT_CONSENT;
376        } else if (pairingVariant == AbstractionLayer.BT_SSP_VARIANT_PASSKEY_ENTRY) {
377            variant = BluetoothDevice.PAIRING_VARIANT_PASSKEY;
378        } else if (pairingVariant == AbstractionLayer.BT_SSP_VARIANT_PASSKEY_NOTIFICATION) {
379            variant = BluetoothDevice.PAIRING_VARIANT_DISPLAY_PASSKEY;
380	    displayPasskey = true;
381        } else {
382            errorLog("SSP Pairing variant not present");
383            return;
384        }
385        BluetoothDevice device = getDevice(address);
386        if (device == null) {
387           warnLog("Device is not known for:" + Utils.getAddressStringFromByte(address));
388           addDeviceProperties(address);
389           device = getDevice(address);
390        }
391        Intent intent = new Intent(BluetoothDevice.ACTION_PAIRING_REQUEST);
392        intent.putExtra(BluetoothDevice.EXTRA_DEVICE, device);
393        if (displayPasskey) {
394            intent.putExtra(BluetoothDevice.EXTRA_PAIRING_KEY, passkey);
395        }
396        intent.putExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT, variant);
397        mAdapterService.sendBroadcast(intent, mAdapterService.BLUETOOTH_ADMIN_PERM);
398    }
399
400    void aclStateChangeCallback(int status, byte[] address, int newState) {
401        BluetoothDevice device = getDevice(address);
402
403        if (device == null) {
404            errorLog("aclStateChangeCallback: Device is NULL");
405            return;
406        }
407
408        Intent intent = null;
409        if (newState == AbstractionLayer.BT_ACL_STATE_CONNECTED) {
410            intent = new Intent(BluetoothDevice.ACTION_ACL_CONNECTED);
411            debugLog("aclStateChangeCallback: State:Connected to Device:" + device);
412        } else {
413            intent = new Intent(BluetoothDevice.ACTION_ACL_DISCONNECTED);
414            debugLog("aclStateChangeCallback: State:DisConnected to Device:" + device);
415        }
416        intent.putExtra(BluetoothDevice.EXTRA_DEVICE, device);
417        intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
418        mAdapterService.sendBroadcast(intent, mAdapterService.BLUETOOTH_PERM);
419    }
420
421    void fetchUuids(BluetoothDevice device) {
422        if (mSdpTracker.contains(device)) return;
423        mSdpTracker.add(device);
424
425        Message message = mHandler.obtainMessage(MESSAGE_UUID_INTENT);
426        message.obj = device;
427        mHandler.sendMessageDelayed(message, UUID_INTENT_DELAY);
428
429        //mAdapterService.getDevicePropertyNative(Utils.getBytesFromAddress(device.getAddress()), AbstractionLayer.BT_PROPERTY_UUIDS);
430        mAdapterService.getRemoteServicesNative(Utils.getBytesFromAddress(device.getAddress()));
431    }
432
433    private final Handler mHandler = new Handler() {
434        @Override
435        public void handleMessage(Message msg) {
436            switch (msg.what) {
437            case MESSAGE_UUID_INTENT:
438                BluetoothDevice device = (BluetoothDevice)msg.obj;
439                if (device != null) {
440                    sendUuidIntent(device);
441                }
442                break;
443            }
444        }
445    };
446
447    private void errorLog(String msg) {
448        Log.e(TAG, msg);
449    }
450
451    private void debugLog(String msg) {
452        if (DBG) Log.d(TAG, msg);
453    }
454
455    private void infoLog(String msg) {
456        if (DBG) Log.i(TAG, msg);
457    }
458
459    private void warnLog(String msg) {
460        Log.w(TAG, msg);
461    }
462
463}
464