bluetooth/btservice/AdapterProperties.java

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.bluetooth.btservice;

import android.bluetooth.BluetoothA2dp;
import android.bluetooth.BluetoothA2dpSink;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothAvrcpController;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothHeadset;
import android.bluetooth.BluetoothHeadsetClient;
import android.bluetooth.BluetoothInputDevice;
import android.bluetooth.BluetoothInputHost;
import android.bluetooth.BluetoothMap;
import android.bluetooth.BluetoothMapClient;
import android.bluetooth.BluetoothPan;
import android.bluetooth.BluetoothPbap;
import android.bluetooth.BluetoothPbapClient;
import android.bluetooth.BluetoothProfile;
import android.bluetooth.BluetoothSap;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.ParcelUuid;
import android.os.UserHandle;
import android.util.Log;
import android.util.Pair;

import com.android.bluetooth.Utils;
import com.android.bluetooth.btservice.RemoteDevices.DeviceProperties;

import java.lang.System;
import java.util.HashMap;
import java.util.concurrent.CopyOnWriteArrayList;

class AdapterProperties {
    private static final boolean DBG = true;
    private static final boolean VDBG = false;
    private static final String TAG = "BluetoothAdapterProperties";

    private static final long DEFAULT_DISCOVERY_TIMEOUT_MS = 12800;
    private static final int BD_ADDR_LEN = 6; // in bytes

    private volatile String mName;
    private volatile byte[] mAddress;
    private volatile int mBluetoothClass;
    private volatile int mScanMode;
    private volatile int mDiscoverableTimeout;
    private volatile ParcelUuid[] mUuids;
    private CopyOnWriteArrayList<BluetoothDevice> mBondedDevices = new CopyOnWriteArrayList<BluetoothDevice>();

    private int mProfilesConnecting, mProfilesConnected, mProfilesDisconnecting;
    private final HashMap<Integer, Pair<Integer, Integer>> mProfileConnectionState =
            new HashMap<>();

    private volatile int mConnectionState = BluetoothAdapter.STATE_DISCONNECTED;
    private volatile int mState = BluetoothAdapter.STATE_OFF;

    private AdapterService mService;
    private boolean mDiscovering;
    private long mDiscoveryEndMs; //< Time (ms since epoch) that discovery ended or will end.
    private RemoteDevices mRemoteDevices;
    private BluetoothAdapter mAdapter;
    //TODO - all hw capabilities to be exposed as a class
    private int mNumOfAdvertisementInstancesSupported;
    private boolean mRpaOffloadSupported;
    private int mNumOfOffloadedIrkSupported;
    private int mNumOfOffloadedScanFilterSupported;
    private int mOffloadedScanResultStorageBytes;
    private int mVersSupported;
    private int mTotNumOfTrackableAdv;
    private boolean mIsExtendedScanSupported;
    private boolean mIsDebugLogSupported;
    private boolean mIsActivityAndEnergyReporting;
    private boolean mIsLe2MPhySupported;
    private boolean mIsLeCodedPhySupported;
    private boolean mIsLeExtendedAdvertisingSupported;
    private boolean mIsLePeriodicAdvertisingSupported;
    private int mLeMaximumAdvertisingDataLength;

    private boolean mReceiverRegistered;
    private BroadcastReceiver mReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            if (action == null) {
                Log.w(TAG, "Received intent with null action");
                return;
            }
            switch (action) {
                case BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED:
                    sendConnectionStateChange(BluetoothProfile.HEADSET, intent);
                    break;
                case BluetoothA2dp.ACTION_CONNECTION_STATE_CHANGED:
                    sendConnectionStateChange(BluetoothProfile.A2DP, intent);
                    break;
                case BluetoothHeadsetClient.ACTION_CONNECTION_STATE_CHANGED:
                    sendConnectionStateChange(BluetoothProfile.HEADSET_CLIENT, intent);
                    break;
                case BluetoothA2dpSink.ACTION_CONNECTION_STATE_CHANGED:
                    sendConnectionStateChange(BluetoothProfile.A2DP_SINK, intent);
                    break;
                case BluetoothInputHost.ACTION_CONNECTION_STATE_CHANGED:
                    sendConnectionStateChange(BluetoothProfile.INPUT_HOST, intent);
                    break;
                case BluetoothInputDevice.ACTION_CONNECTION_STATE_CHANGED:
                    sendConnectionStateChange(BluetoothProfile.INPUT_DEVICE, intent);
                    break;
                case BluetoothAvrcpController.ACTION_CONNECTION_STATE_CHANGED:
                    sendConnectionStateChange(BluetoothProfile.AVRCP_CONTROLLER, intent);
                    break;
                case BluetoothPan.ACTION_CONNECTION_STATE_CHANGED:
                    sendConnectionStateChange(BluetoothProfile.PAN, intent);
                    break;
                case BluetoothMap.ACTION_CONNECTION_STATE_CHANGED:
                    sendConnectionStateChange(BluetoothProfile.MAP, intent);
                    break;
                case BluetoothMapClient.ACTION_CONNECTION_STATE_CHANGED:
                    sendConnectionStateChange(BluetoothProfile.MAP_CLIENT, intent);
                    break;
                case BluetoothSap.ACTION_CONNECTION_STATE_CHANGED:
                    sendConnectionStateChange(BluetoothProfile.SAP, intent);
                    break;
                case BluetoothPbapClient.ACTION_CONNECTION_STATE_CHANGED:
                    sendConnectionStateChange(BluetoothProfile.PBAP_CLIENT, intent);
                    break;
                case BluetoothPbap.ACTION_CONNECTION_STATE_CHANGED:
                    sendConnectionStateChange(BluetoothProfile.PBAP, intent);
                    break;
                default:
                    Log.w(TAG, "Received unknown intent " + intent);
                    break;
            }
        }
    };

    // Lock for all getters and setters.
    // If finer grained locking is needer, more locks
    // can be added here.
    private final Object mObject = new Object();

    public AdapterProperties(AdapterService service) {
        mService = service;
        mAdapter = BluetoothAdapter.getDefaultAdapter();
    }
    public void init(RemoteDevices remoteDevices) {
        mProfileConnectionState.clear();
        mRemoteDevices = remoteDevices;

        IntentFilter filter = new IntentFilter();
        filter.addAction(BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED);
        filter.addAction(BluetoothHeadsetClient.ACTION_CONNECTION_STATE_CHANGED);
        filter.addAction(BluetoothA2dp.ACTION_CONNECTION_STATE_CHANGED);
        filter.addAction(BluetoothA2dpSink.ACTION_CONNECTION_STATE_CHANGED);
        filter.addAction(BluetoothInputHost.ACTION_CONNECTION_STATE_CHANGED);
        filter.addAction(BluetoothInputDevice.ACTION_CONNECTION_STATE_CHANGED);
        filter.addAction(BluetoothAvrcpController.ACTION_CONNECTION_STATE_CHANGED);
        filter.addAction(BluetoothPan.ACTION_CONNECTION_STATE_CHANGED);
        filter.addAction(BluetoothMap.ACTION_CONNECTION_STATE_CHANGED);
        filter.addAction(BluetoothMapClient.ACTION_CONNECTION_STATE_CHANGED);
        filter.addAction(BluetoothSap.ACTION_CONNECTION_STATE_CHANGED);
        filter.addAction(BluetoothPbapClient.ACTION_CONNECTION_STATE_CHANGED);
        mService.registerReceiver(mReceiver, filter);
        mReceiverRegistered = true;
    }

    public void cleanup() {
        mRemoteDevices = null;
        mProfileConnectionState.clear();
        if (mReceiverRegistered) {
            mService.unregisterReceiver(mReceiver);
            mReceiverRegistered = false;
        }
        mService = null;
        mBondedDevices.clear();
    }

    @Override
    public Object clone() throws CloneNotSupportedException {
        throw new CloneNotSupportedException();
    }

    /**
     * @return the mName
     */
    String getName() {
        return mName;
    }

    /**
     * Set the local adapter property - name
     * @param name the name to set
     */
    boolean setName(String name) {
        synchronized (mObject) {
            return mService.setAdapterPropertyNative(
                    AbstractionLayer.BT_PROPERTY_BDNAME, name.getBytes());
        }
    }

    /**
     * Set the Bluetooth Class of Device (CoD) of the adapter.
     *
     * @param bytes BluetoothClass of the device
     */
    boolean setBluetoothClass(byte[] bytes) {
        synchronized (mObject) {
            return mService.setAdapterPropertyNative(
                    AbstractionLayer.BT_PROPERTY_CLASS_OF_DEVICE, bytes);
        }
    }

    /**
     * @return the mClass
     */
    int getBluetoothClass() {
        return mBluetoothClass;
    }

    /**
     * @return the mScanMode
     */
    int getScanMode() {
        return mScanMode;
    }

    /**
     * Set the local adapter property - scanMode
     *
     * @param scanMode the ScanMode to set
     */
    boolean setScanMode(int scanMode) {
        synchronized (mObject) {
            return mService.setAdapterPropertyNative(
                    AbstractionLayer.BT_PROPERTY_ADAPTER_SCAN_MODE, Utils.intToByteArray(scanMode));
        }
    }

    /**
     * @return the mUuids
     */
    ParcelUuid[] getUuids() {
        return mUuids;
    }

    /**
     * @return the mAddress
     */
    byte[] getAddress() {
        return mAddress;
    }

    /**
     * @param mConnectionState the mConnectionState to set
     */
    void setConnectionState(int mConnectionState) {
        this.mConnectionState = mConnectionState;
    }

    /**
     * @return the mConnectionState
     */
    int getConnectionState() {
        return mConnectionState;
    }

    /**
     * @param mState the mState to set
     */
    void setState(int mState) {
        debugLog("Setting state to " + mState);
        this.mState = mState;
    }

    /**
     * @return the mState
     */
    int getState() {
        return mState;
    }

    /**
     * @return the mNumOfAdvertisementInstancesSupported
     */
    int getNumOfAdvertisementInstancesSupported() {
        return mNumOfAdvertisementInstancesSupported;
    }

    /**
     * @return the mRpaOffloadSupported
     */
    boolean isRpaOffloadSupported() {
        return mRpaOffloadSupported;
    }

    /**
     * @return the mNumOfOffloadedIrkSupported
     */
    int getNumOfOffloadedIrkSupported() {
        return mNumOfOffloadedIrkSupported;
    }

    /**
     * @return the mNumOfOffloadedScanFilterSupported
     */
    int getNumOfOffloadedScanFilterSupported() {
        return mNumOfOffloadedScanFilterSupported;
    }

    /**
     * @return the mOffloadedScanResultStorageBytes
     */
    int getOffloadedScanResultStorage() {
        return mOffloadedScanResultStorageBytes;
    }

    /**
     * @return tx/rx/idle activity and energy info
     */
    boolean isActivityAndEnergyReportingSupported() {
        return mIsActivityAndEnergyReporting;
    }

    /**
     * @return the mIsLe2MPhySupported
     */
    boolean isLe2MPhySupported() {
        return mIsLe2MPhySupported;
    }

    /**
     * @return the mIsLeCodedPhySupported
     */
    boolean isLeCodedPhySupported() {
        return mIsLeCodedPhySupported;
    }

    /**
     * @return the mIsLeExtendedAdvertisingSupported
     */
    boolean isLeExtendedAdvertisingSupported() {
        return mIsLeExtendedAdvertisingSupported;
    }

    /**
     * @return the mIsLePeriodicAdvertisingSupported
     */
    boolean isLePeriodicAdvertisingSupported() {
        return mIsLePeriodicAdvertisingSupported;
    }

    /**
     * @return the getLeMaximumAdvertisingDataLength
     */
    int getLeMaximumAdvertisingDataLength() {
        return mLeMaximumAdvertisingDataLength;
    }

    /**
     * @return total number of trackable advertisements
     */
    int getTotalNumOfTrackableAdvertisements() {
        return mTotNumOfTrackableAdv;
    }

    /**
     * @return the mBondedDevices
     */
    BluetoothDevice[] getBondedDevices() {
        BluetoothDevice[] bondedDeviceList = new BluetoothDevice[0];
        try {
            bondedDeviceList = mBondedDevices.toArray(bondedDeviceList);
        } catch(ArrayStoreException ee) {
            errorLog("Error retrieving bonded device array");
        }
        infoLog("getBondedDevices: length=" + bondedDeviceList.length);
        return bondedDeviceList;
    }

    // This function shall be invoked from BondStateMachine whenever the bond
    // state changes.
    void onBondStateChanged(BluetoothDevice device, int state)
    {
        if (device == null) {
            Log.w(TAG, "onBondStateChanged, device is null");
            return;
        }
        try {
            byte[] addrByte = Utils.getByteAddress(device);
            DeviceProperties prop = mRemoteDevices.getDeviceProperties(device);
            if (prop == null)
                prop = mRemoteDevices.addDeviceProperties(addrByte);
            prop.setBondState(state);

            if (state == BluetoothDevice.BOND_BONDED) {
                // add if not already in list
                if(!mBondedDevices.contains(device)) {
                    debugLog("Adding bonded device:" +  device);
                    mBondedDevices.add(device);
                }
            } else if (state == BluetoothDevice.BOND_NONE) {
                // remove device from list
                if (mBondedDevices.remove(device))
                    debugLog("Removing bonded device:" +  device);
                else
                    debugLog("Failed to remove device: " + device);
            }
        }
        catch(Exception ee) {
            Log.w(TAG, "onBondStateChanged: Exception ", ee);
        }
    }

    int getDiscoverableTimeout() {
        return mDiscoverableTimeout;
    }

    boolean setDiscoverableTimeout(int timeout) {
        synchronized (mObject) {
            return mService.setAdapterPropertyNative(
                    AbstractionLayer.BT_PROPERTY_ADAPTER_DISCOVERABLE_TIMEOUT,
                    Utils.intToByteArray(timeout));
        }
    }

    int getProfileConnectionState(int profile) {
        synchronized (mObject) {
            Pair<Integer, Integer> p = mProfileConnectionState.get(profile);
            if (p != null) return p.first;
            return BluetoothProfile.STATE_DISCONNECTED;
        }
    }

    long discoveryEndMillis() {
        return mDiscoveryEndMs;
    }

    boolean isDiscovering() {
        return mDiscovering;
    }

    private void sendConnectionStateChange(int profile, Intent connIntent) {
        BluetoothDevice device = connIntent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
        int prevState = connIntent.getIntExtra(BluetoothProfile.EXTRA_PREVIOUS_STATE, -1);
        int state = connIntent.getIntExtra(BluetoothProfile.EXTRA_STATE, -1);
        Log.d(TAG,
                "PROFILE_CONNECTION_STATE_CHANGE: profile=" + profile + ", device=" + device + ", "
                        + prevState + " -> " + state);
        if (!isNormalStateTransition(prevState, state)) {
            Log.w(TAG,
                    "PROFILE_CONNECTION_STATE_CHANGE: unexpected transition for profile=" + profile
                            + ", device=" + device + ", " + prevState + " -> " + state);
        }
        sendConnectionStateChange(device, profile, state, prevState);
    }
    void sendConnectionStateChange(BluetoothDevice device, int profile, int state, int prevState) {
        if (!validateProfileConnectionState(state) ||
                !validateProfileConnectionState(prevState)) {
            // Previously, an invalid state was broadcast anyway,
            // with the invalid state converted to -1 in the intent.
            // Better to log an error and not send an intent with
            // invalid contents or set mAdapterConnectionState to -1.
            errorLog("sendConnectionStateChange: invalid state transition " + prevState + " -> "
                    + state);
            return;
        }

        synchronized (mObject) {
            updateProfileConnectionState(profile, state, prevState);

            if (updateCountersAndCheckForConnectionStateChange(state, prevState)) {
                int newAdapterState = convertToAdapterState(state);
                int prevAdapterState = convertToAdapterState(prevState);
                setConnectionState(newAdapterState);

                Intent intent = new Intent(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED);
                intent.putExtra(BluetoothDevice.EXTRA_DEVICE, device);
                intent.putExtra(BluetoothAdapter.EXTRA_CONNECTION_STATE, newAdapterState);
                intent.putExtra(BluetoothAdapter.EXTRA_PREVIOUS_CONNECTION_STATE, prevAdapterState);
                intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
                Log.d(TAG,
                        "ADAPTER_CONNECTION_STATE_CHANGE: " + device + ": " + prevAdapterState
                                + " -> " + newAdapterState);
                if (!isNormalStateTransition(prevState, state)) {
                    Log.w(TAG,
                            "ADAPTER_CONNECTION_STATE_CHANGE: unexpected transition for profile="
                                    + profile + ", device=" + device + ", " + prevState + " -> "
                                    + state);
                }
                mService.sendBroadcastAsUser(intent, UserHandle.ALL, AdapterService.BLUETOOTH_PERM);
            }
        }
    }

    private boolean validateProfileConnectionState(int state) {
        return (state == BluetoothProfile.STATE_DISCONNECTED ||
                state == BluetoothProfile.STATE_CONNECTING ||
                state == BluetoothProfile.STATE_CONNECTED ||
                state == BluetoothProfile.STATE_DISCONNECTING);
    }

    private static int convertToAdapterState(int state) {
        switch (state) {
            case BluetoothProfile.STATE_DISCONNECTED:
                return BluetoothAdapter.STATE_DISCONNECTED;
            case BluetoothProfile.STATE_DISCONNECTING:
                return BluetoothAdapter.STATE_DISCONNECTING;
            case BluetoothProfile.STATE_CONNECTED:
                return BluetoothAdapter.STATE_CONNECTED;
            case BluetoothProfile.STATE_CONNECTING:
                return BluetoothAdapter.STATE_CONNECTING;
        }
        Log.e(TAG, "convertToAdapterState, unknow state " + state);
        return -1;
    }

    private static boolean isNormalStateTransition(int prevState, int nextState) {
        switch (prevState) {
            case BluetoothProfile.STATE_DISCONNECTED:
                return nextState == BluetoothProfile.STATE_CONNECTING;
            case BluetoothProfile.STATE_CONNECTED:
                return nextState == BluetoothProfile.STATE_DISCONNECTING;
            case BluetoothProfile.STATE_DISCONNECTING:
            case BluetoothProfile.STATE_CONNECTING:
                return (nextState == BluetoothProfile.STATE_DISCONNECTED)
                        || (nextState == BluetoothProfile.STATE_CONNECTED);
            default:
                return false;
        }
    }

    private boolean updateCountersAndCheckForConnectionStateChange(int state, int prevState) {
        switch (prevState) {
            case BluetoothProfile.STATE_CONNECTING:
                if (mProfilesConnecting > 0)
                    mProfilesConnecting--;
                else
                    Log.e(TAG, "mProfilesConnecting " + mProfilesConnecting);
                break;

            case BluetoothProfile.STATE_CONNECTED:
                if (mProfilesConnected > 0)
                    mProfilesConnected--;
                else
                    Log.e(TAG, "mProfilesConnected " + mProfilesConnected);
                break;

            case BluetoothProfile.STATE_DISCONNECTING:
                if (mProfilesDisconnecting > 0)
                    mProfilesDisconnecting--;
                else
                    Log.e(TAG, "mProfilesDisconnecting " + mProfilesDisconnecting);
                break;
        }

        switch (state) {
            case BluetoothProfile.STATE_CONNECTING:
                mProfilesConnecting++;
                return (mProfilesConnected == 0 && mProfilesConnecting == 1);

            case BluetoothProfile.STATE_CONNECTED:
                mProfilesConnected++;
                return (mProfilesConnected == 1);

            case BluetoothProfile.STATE_DISCONNECTING:
                mProfilesDisconnecting++;
                return (mProfilesConnected == 0 && mProfilesDisconnecting == 1);

            case BluetoothProfile.STATE_DISCONNECTED:
                return (mProfilesConnected == 0 && mProfilesConnecting == 0);

            default:
                return true;
        }
    }

    private void updateProfileConnectionState(int profile, int newState, int oldState) {
        // mProfileConnectionState is a hashmap -
        // <Integer, Pair<Integer, Integer>>
        // The key is the profile, the value is a pair. first element
        // is the state and the second element is the number of devices
        // in that state.
        int numDev = 1;
        int newHashState = newState;
        boolean update = true;

        // The following conditions are considered in this function:
        // 1. If there is no record of profile and state - update
        // 2. If a new device's state is current hash state - increment
        //    number of devices in the state.
        // 3. If a state change has happened to Connected or Connecting
        //    (if current state is not connected), update.
        // 4. If numDevices is 1 and that device state is being updated, update
        // 5. If numDevices is > 1 and one of the devices is changing state,
        //    decrement numDevices but maintain oldState if it is Connected or
        //    Connecting
        Pair<Integer, Integer> stateNumDev = mProfileConnectionState.get(profile);
        if (stateNumDev != null) {
            int currHashState = stateNumDev.first;
            numDev = stateNumDev.second;

            if (newState == currHashState) {
                numDev ++;
            } else if (newState == BluetoothProfile.STATE_CONNECTED ||
                   (newState == BluetoothProfile.STATE_CONNECTING &&
                    currHashState != BluetoothProfile.STATE_CONNECTED)) {
                 numDev = 1;
            } else if (numDev == 1 && oldState == currHashState) {
                 update = true;
            } else if (numDev > 1 && oldState == currHashState) {
                 numDev --;

                 if (currHashState == BluetoothProfile.STATE_CONNECTED ||
                     currHashState == BluetoothProfile.STATE_CONNECTING) {
                    newHashState = currHashState;
                 }
            } else {
                 update = false;
            }
        }

        if (update) {
            mProfileConnectionState.put(profile, new Pair<Integer, Integer>(newHashState,
                    numDev));
        }
    }

    void adapterPropertyChangedCallback(int[] types, byte[][] values) {
        Intent intent;
        int type;
        byte[] val;
        for (int i = 0; i < types.length; i++) {
            val = values[i];
            type = types[i];
            infoLog("adapterPropertyChangedCallback with type:" + type + " len:" + val.length);
            synchronized (mObject) {
                switch (type) {
                    case AbstractionLayer.BT_PROPERTY_BDNAME:
                        mName = new String(val);
                        intent = new Intent(BluetoothAdapter.ACTION_LOCAL_NAME_CHANGED);
                        intent.putExtra(BluetoothAdapter.EXTRA_LOCAL_NAME, mName);
                        intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
                        mService.sendBroadcastAsUser(
                                intent, UserHandle.ALL, AdapterService.BLUETOOTH_PERM);
                        debugLog("Name is: " + mName);
                        break;
                    case AbstractionLayer.BT_PROPERTY_BDADDR:
                        mAddress = val;
                        String address = Utils.getAddressStringFromByte(mAddress);
                        debugLog("Address is:" + address);
                        intent = new Intent(BluetoothAdapter.ACTION_BLUETOOTH_ADDRESS_CHANGED);
                        intent.putExtra(BluetoothAdapter.EXTRA_BLUETOOTH_ADDRESS, address);
                        intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
                        mService.sendBroadcastAsUser(
                                intent, UserHandle.ALL, AdapterService.BLUETOOTH_PERM);
                        break;
                    case AbstractionLayer.BT_PROPERTY_CLASS_OF_DEVICE:
                        mBluetoothClass = Utils.byteArrayToInt(val, 0);
                        debugLog("BT Class:" + mBluetoothClass);
                        break;
                    case AbstractionLayer.BT_PROPERTY_ADAPTER_SCAN_MODE:
                        int mode = Utils.byteArrayToInt(val, 0);
                        mScanMode = AdapterService.convertScanModeFromHal(mode);
                        intent = new Intent(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED);
                        intent.putExtra(BluetoothAdapter.EXTRA_SCAN_MODE, mScanMode);
                        intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
                        mService.sendBroadcast(intent, AdapterService.BLUETOOTH_PERM);
                        debugLog("Scan Mode:" + mScanMode);
                        if (mBluetoothDisabling) {
                            mBluetoothDisabling=false;
                            mService.startBluetoothDisable();
                        }
                        break;
                    case AbstractionLayer.BT_PROPERTY_UUIDS:
                        mUuids = Utils.byteArrayToUuid(val);
                        break;
                    case AbstractionLayer.BT_PROPERTY_ADAPTER_BONDED_DEVICES:
                        int number = val.length/BD_ADDR_LEN;
                        byte[] addrByte = new byte[BD_ADDR_LEN];
                        for (int j = 0; j < number; j++) {
                            System.arraycopy(val, j * BD_ADDR_LEN, addrByte, 0, BD_ADDR_LEN);
                            onBondStateChanged(mAdapter.getRemoteDevice(
                                               Utils.getAddressStringFromByte(addrByte)),
                                               BluetoothDevice.BOND_BONDED);
                        }
                        break;
                    case AbstractionLayer.BT_PROPERTY_ADAPTER_DISCOVERABLE_TIMEOUT:
                        mDiscoverableTimeout = Utils.byteArrayToInt(val, 0);
                        debugLog("Discoverable Timeout:" + mDiscoverableTimeout);
                        break;

                    case AbstractionLayer.BT_PROPERTY_LOCAL_LE_FEATURES:
                        updateFeatureSupport(val);
                        break;

                    default:
                        errorLog("Property change not handled in Java land:" + type);
                }
            }
        }
    }

    private void updateFeatureSupport(byte[] val) {
        mVersSupported = ((0xFF & ((int)val[1])) << 8)
                            + (0xFF & ((int)val[0]));
        mNumOfAdvertisementInstancesSupported = (0xFF & ((int)val[3]));
        mRpaOffloadSupported = ((0xFF & ((int)val[4]))!= 0);
        mNumOfOffloadedIrkSupported =  (0xFF & ((int)val[5]));
        mNumOfOffloadedScanFilterSupported = (0xFF & ((int)val[6]));
        mIsActivityAndEnergyReporting = ((0xFF & ((int)val[7])) != 0);
        mOffloadedScanResultStorageBytes = ((0xFF & ((int)val[9])) << 8)
                            + (0xFF & ((int)val[8]));
        mTotNumOfTrackableAdv = ((0xFF & ((int)val[11])) << 8)
                            + (0xFF & ((int)val[10]));
        mIsExtendedScanSupported = ((0xFF & ((int)val[12])) != 0);
        mIsDebugLogSupported = ((0xFF & ((int)val[13])) != 0);
        mIsLe2MPhySupported = ((0xFF & ((int) val[14])) != 0);
        mIsLeCodedPhySupported = ((0xFF & ((int) val[15])) != 0);
        mIsLeExtendedAdvertisingSupported = ((0xFF & ((int) val[16])) != 0);
        mIsLePeriodicAdvertisingSupported = ((0xFF & ((int) val[17])) != 0);
        mLeMaximumAdvertisingDataLength =   (0xFF & ((int)val[18]))
                                         + ((0xFF & ((int)val[19])) << 8);

        Log.d(TAG, "BT_PROPERTY_LOCAL_LE_FEATURES: update from BT controller"
                + " mNumOfAdvertisementInstancesSupported = "
                + mNumOfAdvertisementInstancesSupported
                + " mRpaOffloadSupported = " + mRpaOffloadSupported
                + " mNumOfOffloadedIrkSupported = "
                + mNumOfOffloadedIrkSupported
                + " mNumOfOffloadedScanFilterSupported = "
                + mNumOfOffloadedScanFilterSupported
                + " mOffloadedScanResultStorageBytes= "
                + mOffloadedScanResultStorageBytes
                + " mIsActivityAndEnergyReporting = "
                + mIsActivityAndEnergyReporting
                +" mVersSupported = "
                + mVersSupported
                + " mTotNumOfTrackableAdv = "
                + mTotNumOfTrackableAdv
                + " mIsExtendedScanSupported = "
                + mIsExtendedScanSupported
                + " mIsDebugLogSupported = "
                + mIsDebugLogSupported
                + " mIsLe2MPhySupported = "
                + mIsLe2MPhySupported
                + " mIsLeCodedPhySupported = "
                + mIsLeCodedPhySupported
                + " mIsLeExtendedAdvertisingSupported = "
                + mIsLeExtendedAdvertisingSupported
                + " mIsLePeriodicAdvertisingSupported = "
                + mIsLePeriodicAdvertisingSupported
                + " mLeMaximumAdvertisingDataLength = "
                + mLeMaximumAdvertisingDataLength
                );
    }

    void onBluetoothReady() {
        debugLog("onBluetoothReady, state=" + getState() + ", ScanMode=" + mScanMode);

        synchronized (mObject) {
            // Reset adapter and profile connection states
            setConnectionState(BluetoothAdapter.STATE_DISCONNECTED);
            mProfileConnectionState.clear();
            mProfilesConnected = 0;
            mProfilesConnecting = 0;
            mProfilesDisconnecting = 0;
            // When BT is being turned on, all adapter properties will be sent in 1
            // callback. At this stage, set the scan mode.
            if (getState() == BluetoothAdapter.STATE_TURNING_ON &&
                    mScanMode == BluetoothAdapter.SCAN_MODE_NONE) {
                    /* mDiscoverableTimeout is part of the
                       adapterPropertyChangedCallback received before
                       onBluetoothReady */
                    if (mDiscoverableTimeout != 0)
                      setScanMode(AbstractionLayer.BT_SCAN_MODE_CONNECTABLE);
                    else /* if timeout == never (0) at startup */
                      setScanMode(AbstractionLayer.BT_SCAN_MODE_CONNECTABLE_DISCOVERABLE);
                    /* though not always required, this keeps NV up-to date on first-boot after flash */
                    setDiscoverableTimeout(mDiscoverableTimeout);
            }
        }
    }

    private boolean mBluetoothDisabling = false;

    void onBleDisable() {
        // Sequence BLE_ON to STATE_OFF - that is _complete_ OFF state.
        // When BT disable is invoked, set the scan_mode to NONE
        // so no incoming connections are possible
        debugLog("onBleDisable");
        if (getState() == BluetoothAdapter.STATE_BLE_TURNING_OFF) {
           setScanMode(AbstractionLayer.BT_SCAN_MODE_NONE);
        }
    }

    void onBluetoothDisable() {
        // From STATE_ON to BLE_ON
        // When BT disable is invoked, set the scan_mode to NONE
        // so no incoming connections are possible

        //Set flag to indicate we are disabling. When property change of scan mode done
        //continue with disable sequence
        debugLog("onBluetoothDisable()");
        mBluetoothDisabling = true;
        if (getState() == BluetoothAdapter.STATE_TURNING_OFF) {
            // Turn off any Device Search/Inquiry
            mService.cancelDiscovery();
            setScanMode(AbstractionLayer.BT_SCAN_MODE_NONE);
        }
    }

    void discoveryStateChangeCallback(int state) {
        infoLog("Callback:discoveryStateChangeCallback with state:" + state);
        synchronized (mObject) {
            Intent intent;
            if (state == AbstractionLayer.BT_DISCOVERY_STOPPED) {
                mDiscovering = false;
                mDiscoveryEndMs = System.currentTimeMillis();
                intent = new Intent(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
                mService.sendBroadcast(intent, AdapterService.BLUETOOTH_PERM);
            } else if (state == AbstractionLayer.BT_DISCOVERY_STARTED) {
                mDiscovering = true;
                mDiscoveryEndMs = System.currentTimeMillis() + DEFAULT_DISCOVERY_TIMEOUT_MS;
                intent = new Intent(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
                mService.sendBroadcast(intent, AdapterService.BLUETOOTH_PERM);
            }
        }
    }

    private static void infoLog(String msg) {
        if (VDBG) Log.i(TAG, msg);
    }

    private static void debugLog(String msg) {
        if (DBG) Log.d(TAG, msg);
    }

    private static void errorLog(String msg) {
        Log.e(TAG, msg);
    }
}