| /* |
| * 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.BluetoothAdapter; |
| import android.bluetooth.BluetoothProfile; |
| import android.bluetooth.BluetoothDevice; |
| import com.android.bluetooth.a2dp.A2dpService; |
| import com.android.bluetooth.hid.HidService; |
| import com.android.bluetooth.hfp.HeadsetService; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.os.Message; |
| import android.os.UserHandle; |
| import android.util.Log; |
| |
| import com.android.bluetooth.Utils; |
| import com.android.bluetooth.btservice.RemoteDevices.DeviceProperties; |
| import com.android.internal.util.State; |
| import com.android.internal.util.StateMachine; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * This state machine handles Bluetooth Adapter State. |
| * States: |
| * {@link StableState} : No device is in bonding / unbonding state. |
| * {@link PendingCommandState} : Some device is in bonding / unbonding state. |
| * TODO(BT) This class can be removed and this logic moved to the stack. |
| */ |
| |
| final class BondStateMachine extends StateMachine { |
| private static final boolean DBG = false; |
| private static final String TAG = "BluetoothBondStateMachine"; |
| |
| static final int CREATE_BOND = 1; |
| static final int CANCEL_BOND = 2; |
| static final int REMOVE_BOND = 3; |
| static final int BONDING_STATE_CHANGE = 4; |
| |
| static final int BOND_STATE_NONE = 0; |
| static final int BOND_STATE_BONDING = 1; |
| static final int BOND_STATE_BONDED = 2; |
| |
| private AdapterService mAdapterService; |
| private AdapterProperties mAdapterProperties; |
| private RemoteDevices mRemoteDevices; |
| private BluetoothAdapter mAdapter; |
| |
| private PendingCommandState mPendingCommandState = new PendingCommandState(); |
| private StableState mStableState = new StableState(); |
| |
| private BondStateMachine(AdapterService service, |
| AdapterProperties prop, RemoteDevices remoteDevices) { |
| super("BondStateMachine:"); |
| addState(mStableState); |
| addState(mPendingCommandState); |
| mRemoteDevices = remoteDevices; |
| mAdapterService = service; |
| mAdapterProperties = prop; |
| mAdapter = BluetoothAdapter.getDefaultAdapter(); |
| setInitialState(mStableState); |
| } |
| |
| public static BondStateMachine make(AdapterService service, |
| AdapterProperties prop, RemoteDevices remoteDevices) { |
| Log.d(TAG, "make"); |
| BondStateMachine bsm = new BondStateMachine(service, prop, remoteDevices); |
| bsm.start(); |
| return bsm; |
| } |
| |
| public void doQuit() { |
| quitNow(); |
| } |
| |
| public void cleanup() { |
| mAdapterService = null; |
| mRemoteDevices = null; |
| mAdapterProperties = null; |
| } |
| |
| private class StableState extends State { |
| @Override |
| public void enter() { |
| infoLog("StableState(): Entering Off State"); |
| } |
| |
| @Override |
| public boolean processMessage(Message msg) { |
| |
| BluetoothDevice dev = (BluetoothDevice)msg.obj; |
| |
| switch(msg.what) { |
| |
| case CREATE_BOND: |
| createBond(dev, true); |
| break; |
| case REMOVE_BOND: |
| removeBond(dev, true); |
| break; |
| case BONDING_STATE_CHANGE: |
| int newState = msg.arg1; |
| /* if incoming pairing, transition to pending state */ |
| if (newState == BluetoothDevice.BOND_BONDING) |
| { |
| sendIntent(dev, newState, 0); |
| transitionTo(mPendingCommandState); |
| } |
| else |
| { |
| Log.e(TAG, "In stable state, received invalid newState: " + newState); |
| } |
| break; |
| |
| case CANCEL_BOND: |
| default: |
| Log.e(TAG, "Received unhandled state: " + msg.what); |
| return false; |
| } |
| return true; |
| } |
| } |
| |
| |
| private class PendingCommandState extends State { |
| private final ArrayList<BluetoothDevice> mDevices = |
| new ArrayList<BluetoothDevice>(); |
| |
| @Override |
| public void enter() { |
| infoLog("Entering PendingCommandState State"); |
| BluetoothDevice dev = (BluetoothDevice)getCurrentMessage().obj; |
| } |
| |
| @Override |
| public boolean processMessage(Message msg) { |
| |
| BluetoothDevice dev = (BluetoothDevice)msg.obj; |
| boolean result = false; |
| if (mDevices.contains(dev) && |
| msg.what != CANCEL_BOND && msg.what != BONDING_STATE_CHANGE) { |
| deferMessage(msg); |
| return true; |
| } |
| |
| switch (msg.what) { |
| case CREATE_BOND: |
| result = createBond(dev, false); |
| break; |
| case REMOVE_BOND: |
| result = removeBond(dev, false); |
| break; |
| case CANCEL_BOND: |
| result = cancelBond(dev); |
| break; |
| case BONDING_STATE_CHANGE: |
| int newState = msg.arg1; |
| int reason = getUnbondReasonFromHALCode(msg.arg2); |
| sendIntent(dev, newState, reason); |
| if(newState != BluetoothDevice.BOND_BONDING ) |
| { |
| /* this is either none/bonded, remove and transition */ |
| result = !mDevices.remove(dev); |
| if (mDevices.isEmpty()) { |
| // Whenever mDevices is empty, then we need to |
| // set result=false. Else, we will end up adding |
| // the device to the list again. This prevents us |
| // from pairing with a device that we just unpaired |
| result = false; |
| transitionTo(mStableState); |
| } |
| if (newState == BluetoothDevice.BOND_NONE) |
| { |
| // Set the profile Priorities to undefined |
| clearProfilePriorty(dev); |
| } |
| else if (newState == BluetoothDevice.BOND_BONDED) |
| { |
| // Restore the profile priorty settings |
| setProfilePriorty(dev); |
| } |
| } |
| else if(!mDevices.contains(dev)) |
| result=true; |
| break; |
| default: |
| Log.e(TAG, "Received unhandled event:" + msg.what); |
| return false; |
| } |
| if (result) mDevices.add(dev); |
| |
| return true; |
| } |
| } |
| |
| private boolean cancelBond(BluetoothDevice dev) { |
| if (dev.getBondState() == BluetoothDevice.BOND_BONDING) { |
| byte[] addr = Utils.getBytesFromAddress(dev.getAddress()); |
| if (!mAdapterService.cancelBondNative(addr)) { |
| Log.e(TAG, "Unexpected error while cancelling bond:"); |
| } else { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| private boolean removeBond(BluetoothDevice dev, boolean transition) { |
| if (dev.getBondState() == BluetoothDevice.BOND_BONDED) { |
| byte[] addr = Utils.getBytesFromAddress(dev.getAddress()); |
| if (!mAdapterService.removeBondNative(addr)) { |
| Log.e(TAG, "Unexpected error while removing bond:"); |
| } else { |
| if (transition) transitionTo(mPendingCommandState); |
| return true; |
| } |
| |
| } |
| return false; |
| } |
| |
| private boolean createBond(BluetoothDevice dev, boolean transition) { |
| if (dev.getBondState() == BluetoothDevice.BOND_NONE) { |
| infoLog("Bond address is:" + dev); |
| byte[] addr = Utils.getBytesFromAddress(dev.getAddress()); |
| if (!mAdapterService.createBondNative(addr)) { |
| sendIntent(dev, BluetoothDevice.BOND_NONE, |
| BluetoothDevice.UNBOND_REASON_REMOVED); |
| return false; |
| } else if (transition) { |
| transitionTo(mPendingCommandState); |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| private void sendIntent(BluetoothDevice device, int newState, int reason) { |
| DeviceProperties devProp = mRemoteDevices.getDeviceProperties(device); |
| int oldState = BluetoothDevice.BOND_NONE; |
| if (devProp != null) { |
| oldState = devProp.getBondState(); |
| } |
| if (oldState == newState) return; |
| mAdapterProperties.onBondStateChanged(device, newState); |
| |
| Intent intent = new Intent(BluetoothDevice.ACTION_BOND_STATE_CHANGED); |
| intent.putExtra(BluetoothDevice.EXTRA_DEVICE, device); |
| intent.putExtra(BluetoothDevice.EXTRA_BOND_STATE, newState); |
| intent.putExtra(BluetoothDevice.EXTRA_PREVIOUS_BOND_STATE, oldState); |
| if (newState == BluetoothDevice.BOND_NONE) |
| intent.putExtra(BluetoothDevice.EXTRA_REASON, reason); |
| mAdapterService.sendBroadcastAsUser(intent, UserHandle.ALL, |
| AdapterService.BLUETOOTH_PERM); |
| infoLog("Bond State Change Intent:" + device + " OldState: " + oldState |
| + " NewState: " + newState); |
| } |
| |
| void bondStateChangeCallback(int status, byte[] address, int newState) { |
| BluetoothDevice device = mRemoteDevices.getDevice(address); |
| |
| if (device == null) { |
| infoLog("No record of the device:" + device); |
| // This device will be added as part of the BONDING_STATE_CHANGE intent processing |
| // in sendIntent above |
| device = mAdapter.getRemoteDevice(Utils.getAddressStringFromByte(address)); |
| } |
| |
| infoLog("bondStateChangeCallback: Status: " + status + " Address: " + device |
| + " newState: " + newState); |
| |
| Message msg = obtainMessage(BONDING_STATE_CHANGE); |
| msg.obj = device; |
| |
| if (newState == BOND_STATE_BONDED) |
| msg.arg1 = BluetoothDevice.BOND_BONDED; |
| else if (newState == BOND_STATE_BONDING) |
| msg.arg1 = BluetoothDevice.BOND_BONDING; |
| else |
| msg.arg1 = BluetoothDevice.BOND_NONE; |
| msg.arg2 = status; |
| |
| sendMessage(msg); |
| } |
| |
| private void setProfilePriorty (BluetoothDevice device){ |
| HidService hidService = HidService.getHidService(); |
| A2dpService a2dpService = A2dpService.getA2dpService(); |
| HeadsetService headsetService = HeadsetService.getHeadsetService(); |
| |
| if ((hidService != null) && |
| (hidService.getPriority(device) == BluetoothProfile.PRIORITY_UNDEFINED)){ |
| hidService.setPriority(device,BluetoothProfile.PRIORITY_ON); |
| } |
| |
| if ((a2dpService != null) && |
| (a2dpService.getPriority(device) == BluetoothProfile.PRIORITY_UNDEFINED)){ |
| a2dpService.setPriority(device,BluetoothProfile.PRIORITY_ON); |
| } |
| |
| if ((headsetService != null) && |
| (headsetService.getPriority(device) == BluetoothProfile.PRIORITY_UNDEFINED)){ |
| headsetService.setPriority(device,BluetoothProfile.PRIORITY_ON); |
| } |
| } |
| |
| private void clearProfilePriorty (BluetoothDevice device){ |
| HidService hidService = HidService.getHidService(); |
| A2dpService a2dpService = A2dpService.getA2dpService(); |
| HeadsetService headsetService = HeadsetService.getHeadsetService(); |
| |
| if (hidService != null) |
| hidService.setPriority(device,BluetoothProfile.PRIORITY_UNDEFINED); |
| if(a2dpService != null) |
| a2dpService.setPriority(device,BluetoothProfile.PRIORITY_UNDEFINED); |
| if(headsetService != null) |
| headsetService.setPriority(device,BluetoothProfile.PRIORITY_UNDEFINED); |
| } |
| |
| private void infoLog(String msg) { |
| Log.i(TAG, msg); |
| } |
| |
| private void errorLog(String msg) { |
| Log.e(TAG, msg); |
| } |
| |
| private int getUnbondReasonFromHALCode (int reason) { |
| if (reason == AbstractionLayer.BT_STATUS_SUCCESS) |
| return BluetoothDevice.BOND_SUCCESS; |
| else if (reason == AbstractionLayer.BT_STATUS_RMT_DEV_DOWN) |
| return BluetoothDevice.UNBOND_REASON_REMOTE_DEVICE_DOWN; |
| else if (reason == AbstractionLayer.BT_STATUS_AUTH_FAILURE) |
| return BluetoothDevice.UNBOND_REASON_AUTH_FAILED; |
| |
| /* default */ |
| return BluetoothDevice.UNBOND_REASON_REMOVED; |
| } |
| } |
