RemoteDevices.java revision c3cbf72f596c2af659905e06e85a5ac1241610a8 
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         * @return mDeviceType
160         */
161        int getDeviceType() {
162            synchronized (mObject) {
163                return mDeviceType;
164            }
165        }
166
167        /**
168         * @return the mAlias
169         */
170        String getAlias() {
171            synchronized (mObject) {
172                return mAlias;
173            }
174        }
175
176        /**
177         * @param mAlias the mAlias to set
178         */
179        void setAlias(String mAlias) {
180            synchronized (mObject) {
181                mAdapterService.setDevicePropertyNative(mAddress,
182                    AbstractionLayer.BT_PROPERTY_REMOTE_FRIENDLY_NAME, mAlias.getBytes());
183            }
184        }
185
186        /**
187         * @param mBondState the mBondState to set
188         */
189        void setBondState(int mBondState) {
190            synchronized (mObject) {
191                this.mBondState = mBondState;
192                if (mBondState == BluetoothDevice.BOND_NONE)
193                {
194                    /* Clearing the Uuids local copy when the device is unpaired. If not cleared,
195                    cachedBluetoothDevice issued a connect using the local cached copy of uuids,
196                    without waiting for the ACTION_UUID intent.
197                    This was resulting in multiple calls to connect().*/
198                    mUuids = null;
199                }
200            }
201        }
202
203        /**
204         * @return the mBondState
205         */
206        int getBondState() {
207            synchronized (mObject) {
208                return mBondState;
209            }
210        }
211    }
212
213
214    private void sendUuidIntent(BluetoothDevice device) {
215        DeviceProperties prop = getDeviceProperties(device);
216        Intent intent = new Intent(BluetoothDevice.ACTION_UUID);
217        intent.putExtra(BluetoothDevice.EXTRA_DEVICE, device);
218        intent.putExtra(BluetoothDevice.EXTRA_UUID, prop == null? null: prop.mUuids);
219        mAdapterService.sendBroadcast(intent, AdapterService.BLUETOOTH_ADMIN_PERM);
220
221        //Remove the outstanding UUID request
222        mSdpTracker.remove(device);
223    }
224
225    private void sendDisplayPinIntent(byte[] address, int pin) {
226        Intent intent = new Intent(BluetoothDevice.ACTION_PAIRING_REQUEST);
227        intent.putExtra(BluetoothDevice.EXTRA_DEVICE, getDevice(address));
228        intent.putExtra(BluetoothDevice.EXTRA_PAIRING_KEY, pin);
229        intent.putExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT,
230                    BluetoothDevice.PAIRING_VARIANT_DISPLAY_PIN);
231        mAdapterService.sendOrderedBroadcast(intent, mAdapterService.BLUETOOTH_PRIVILEGED_PERM);
232    }
233
234    void devicePropertyChangedCallback(byte[] address, int[] types, byte[][] values) {
235        Intent intent;
236        byte[] val;
237        int type;
238        BluetoothDevice bdDevice = getDevice(address);
239        DeviceProperties device;
240        if (bdDevice == null) {
241            device = addDeviceProperties(address);
242            bdDevice = getDevice(address);
243        } else {
244            device = getDeviceProperties(bdDevice);
245        }
246
247        for (int j = 0; j < types.length; j++) {
248            type = types[j];
249            val = values[j];
250            if(val.length <= 0)
251                errorLog("devicePropertyChangedCallback: bdDevice: " + bdDevice + ", value is empty for type: " + type);
252            else {
253                synchronized(mObject) {
254                    switch (type) {
255                        case AbstractionLayer.BT_PROPERTY_BDNAME:
256                            device.mName = new String(val);
257                            intent = new Intent(BluetoothDevice.ACTION_NAME_CHANGED);
258                            intent.putExtra(BluetoothDevice.EXTRA_DEVICE, bdDevice);
259                            intent.putExtra(BluetoothDevice.EXTRA_NAME, device.mName);
260                            intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
261                            mAdapterService.sendBroadcast(intent, mAdapterService.BLUETOOTH_PERM);
262                            debugLog("Remote Device name is: " + device.mName);
263                            break;
264                        case AbstractionLayer.BT_PROPERTY_REMOTE_FRIENDLY_NAME:
265                            if (device.mAlias != null) {
266                                System.arraycopy(val, 0, device.mAlias, 0, val.length);
267                            }
268                            else {
269                                device.mAlias = new String(val);
270                            }
271                            break;
272                        case AbstractionLayer.BT_PROPERTY_BDADDR:
273                            device.mAddress = val;
274                            debugLog("Remote Address is:" + Utils.getAddressStringFromByte(val));
275                            break;
276                        case AbstractionLayer.BT_PROPERTY_CLASS_OF_DEVICE:
277                            device.mBluetoothClass =  Utils.byteArrayToInt(val);
278                            intent = new Intent(BluetoothDevice.ACTION_CLASS_CHANGED);
279                            intent.putExtra(BluetoothDevice.EXTRA_DEVICE, bdDevice);
280                            intent.putExtra(BluetoothDevice.EXTRA_CLASS,
281                                    new BluetoothClass(device.mBluetoothClass));
282                            intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
283                            mAdapterService.sendBroadcast(intent, mAdapterService.BLUETOOTH_PERM);
284                            debugLog("Remote class is:" + device.mBluetoothClass);
285                            break;
286                        case AbstractionLayer.BT_PROPERTY_UUIDS:
287                            int numUuids = val.length/AbstractionLayer.BT_UUID_SIZE;
288                            device.mUuids = Utils.byteArrayToUuid(val);
289                            sendUuidIntent(bdDevice);
290                            break;
291                        case AbstractionLayer.BT_PROPERTY_TYPE_OF_DEVICE:
292                            // The device type from hal layer, defined in bluetooth.h,
293                            // matches the type defined in BluetoothDevice.java
294                            device.mDeviceType = Utils.byteArrayToInt(val);
295                            break;
296                        case AbstractionLayer.BT_PROPERTY_REMOTE_RSSI:
297                            // RSSI from hal is in one byte
298                            device.mRssi = val[0];
299                            break;
300                    }
301                }
302            }
303        }
304    }
305
306    void deviceFoundCallback(byte[] address) {
307        // The device properties are already registered - we can send the intent
308        // now
309        BluetoothDevice device = getDevice(address);
310        debugLog("deviceFoundCallback: Remote Address is:" + device);
311        DeviceProperties deviceProp = getDeviceProperties(device);
312        if (deviceProp == null) {
313            errorLog("Device Properties is null for Device:" + device);
314            return;
315        }
316
317        Intent intent = new Intent(BluetoothDevice.ACTION_FOUND);
318        intent.putExtra(BluetoothDevice.EXTRA_DEVICE, device);
319        intent.putExtra(BluetoothDevice.EXTRA_CLASS,
320                new BluetoothClass(Integer.valueOf(deviceProp.mBluetoothClass)));
321        intent.putExtra(BluetoothDevice.EXTRA_RSSI, deviceProp.mRssi);
322        intent.putExtra(BluetoothDevice.EXTRA_NAME, deviceProp.mName);
323
324        mAdapterService.sendBroadcast(intent, mAdapterService.BLUETOOTH_PERM);
325    }
326
327    void pinRequestCallback(byte[] address, byte[] name, int cod) {
328        //TODO(BT): Get wakelock and update name and cod
329        BluetoothDevice bdDevice = getDevice(address);
330        if (bdDevice == null) {
331            addDeviceProperties(address);
332        }
333        BluetoothClass btClass = bdDevice.getBluetoothClass();
334        int btDeviceClass = btClass.getDeviceClass();
335        if (btDeviceClass == BluetoothClass.Device.PERIPHERAL_KEYBOARD ||
336            btDeviceClass == BluetoothClass.Device.PERIPHERAL_KEYBOARD_POINTING) {
337            // Its a keyboard. Follow the HID spec recommendation of creating the
338            // passkey and displaying it to the user. If the keyboard doesn't follow
339            // the spec recommendation, check if the keyboard has a fixed PIN zero
340            // and pair.
341            //TODO: Add sFixedPinZerosAutoPairKeyboard() and maintain list of devices that have fixed pin
342            /*if (mAdapterService.isFixedPinZerosAutoPairKeyboard(address)) {
343                               mAdapterService.setPin(address, BluetoothDevice.convertPinToBytes("0000"));
344                               return;
345                     }*/
346            // Generate a variable PIN. This is not truly random but good enough.
347            int pin = (int) Math.floor(Math.random() * 1000000);
348            sendDisplayPinIntent(address, pin);
349            return;
350        }
351        infoLog("pinRequestCallback: " + address + " name:" + name + " cod:" +
352                cod);
353        Intent intent = new Intent(BluetoothDevice.ACTION_PAIRING_REQUEST);
354        intent.putExtra(BluetoothDevice.EXTRA_DEVICE, getDevice(address));
355        intent.putExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT,
356                BluetoothDevice.PAIRING_VARIANT_PIN);
357        mAdapterService.sendOrderedBroadcast(intent, mAdapterService.BLUETOOTH_PRIVILEGED_PERM);
358        return;
359    }
360
361    void sspRequestCallback(byte[] address, byte[] name, int cod, int pairingVariant,
362            int passkey) {
363        //TODO(BT): Get wakelock and update name and cod
364        BluetoothDevice bdDevice = getDevice(address);
365        if (bdDevice == null) {
366            addDeviceProperties(address);
367        }
368
369        infoLog("sspRequestCallback: " + address + " name: " + name + " cod: " +
370                cod + " pairingVariant " + pairingVariant + " passkey: " + passkey);
371        int variant;
372        boolean displayPasskey = false;
373        if (pairingVariant == AbstractionLayer.BT_SSP_VARIANT_PASSKEY_CONFIRMATION) {
374            variant = BluetoothDevice.PAIRING_VARIANT_PASSKEY_CONFIRMATION;
375            displayPasskey = true;
376        } else if (pairingVariant == AbstractionLayer.BT_SSP_VARIANT_CONSENT) {
377            variant = BluetoothDevice.PAIRING_VARIANT_CONSENT;
378        } else if (pairingVariant == AbstractionLayer.BT_SSP_VARIANT_PASSKEY_ENTRY) {
379            variant = BluetoothDevice.PAIRING_VARIANT_PASSKEY;
380        } else if (pairingVariant == AbstractionLayer.BT_SSP_VARIANT_PASSKEY_NOTIFICATION) {
381            variant = BluetoothDevice.PAIRING_VARIANT_DISPLAY_PASSKEY;
382            displayPasskey = true;
383        } else {
384            errorLog("SSP Pairing variant not present");
385            return;
386        }
387        BluetoothDevice device = getDevice(address);
388        if (device == null) {
389           warnLog("Device is not known for:" + Utils.getAddressStringFromByte(address));
390           addDeviceProperties(address);
391           device = getDevice(address);
392        }
393        Intent intent = new Intent(BluetoothDevice.ACTION_PAIRING_REQUEST);
394        intent.putExtra(BluetoothDevice.EXTRA_DEVICE, device);
395        if (displayPasskey) {
396            intent.putExtra(BluetoothDevice.EXTRA_PAIRING_KEY, passkey);
397        }
398        intent.putExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT, variant);
399        mAdapterService.sendOrderedBroadcast(intent, mAdapterService.BLUETOOTH_PRIVILEGED_PERM);
400    }
401
402    void aclStateChangeCallback(int status, byte[] address, int newState) {
403        BluetoothDevice device = getDevice(address);
404
405        if (device == null) {
406            errorLog("aclStateChangeCallback: Device is NULL");
407            return;
408        }
409
410        Intent intent = null;
411        if (newState == AbstractionLayer.BT_ACL_STATE_CONNECTED) {
412            intent = new Intent(BluetoothDevice.ACTION_ACL_CONNECTED);
413            debugLog("aclStateChangeCallback: State:Connected to Device:" + device);
414        } else {
415            intent = new Intent(BluetoothDevice.ACTION_ACL_DISCONNECTED);
416            debugLog("aclStateChangeCallback: State:DisConnected to Device:" + device);
417        }
418        intent.putExtra(BluetoothDevice.EXTRA_DEVICE, device);
419        intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
420        mAdapterService.sendBroadcast(intent, mAdapterService.BLUETOOTH_PERM);
421    }
422
423    void fetchUuids(BluetoothDevice device) {
424        if (mSdpTracker.contains(device)) return;
425        mSdpTracker.add(device);
426
427        Message message = mHandler.obtainMessage(MESSAGE_UUID_INTENT);
428        message.obj = device;
429        mHandler.sendMessageDelayed(message, UUID_INTENT_DELAY);
430
431        //mAdapterService.getDevicePropertyNative(Utils.getBytesFromAddress(device.getAddress()), AbstractionLayer.BT_PROPERTY_UUIDS);
432        mAdapterService.getRemoteServicesNative(Utils.getBytesFromAddress(device.getAddress()));
433    }
434
435    private final Handler mHandler = new Handler() {
436        @Override
437        public void handleMessage(Message msg) {
438            switch (msg.what) {
439            case MESSAGE_UUID_INTENT:
440                BluetoothDevice device = (BluetoothDevice)msg.obj;
441                if (device != null) {
442                    sendUuidIntent(device);
443                }
444                break;
445            }
446        }
447    };
448
449    private void errorLog(String msg) {
450        Log.e(TAG, msg);
451    }
452
453    private void debugLog(String msg) {
454        if (DBG) Log.d(TAG, msg);
455    }
456
457    private void infoLog(String msg) {
458        if (DBG) Log.i(TAG, msg);
459    }
460
461    private void warnLog(String msg) {
462        Log.w(TAG, msg);
463    }
464
465}
466