| /* |
| * Copyright (C) 2008 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 android.bluetooth; |
| |
| import static android.bluetooth.BluetoothUtils.getSyncTimeout; |
| |
| import android.Manifest; |
| import android.annotation.NonNull; |
| import android.annotation.RequiresNoPermission; |
| import android.annotation.RequiresPermission; |
| import android.annotation.SdkConstant; |
| import android.annotation.SdkConstant.SdkConstantType; |
| import android.annotation.SuppressLint; |
| import android.annotation.SystemApi; |
| import android.bluetooth.annotations.RequiresBluetoothConnectPermission; |
| import android.bluetooth.annotations.RequiresLegacyBluetoothPermission; |
| import android.compat.annotation.UnsupportedAppUsage; |
| import android.content.AttributionSource; |
| import android.content.Context; |
| import android.os.Build; |
| import android.os.IBinder; |
| import android.os.IpcDataCache; |
| import android.os.RemoteException; |
| import android.util.CloseGuard; |
| import android.util.Log; |
| import android.util.Pair; |
| |
| import com.android.modules.utils.SynchronousResultReceiver; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Objects; |
| import java.util.concurrent.TimeoutException; |
| |
| /** |
| * This class provides the APIs to control the Bluetooth SIM Access Profile (SAP). |
| * |
| * <p>BluetoothSap is a proxy object for controlling the Bluetooth Service via IPC. Use {@link |
| * BluetoothAdapter#getProfileProxy} to get the BluetoothSap proxy object. |
| * |
| * <p>Each method is protected with its appropriate permission. |
| * |
| * @hide |
| */ |
| @SystemApi |
| public final class BluetoothSap implements BluetoothProfile, AutoCloseable { |
| |
| private static final String TAG = "BluetoothSap"; |
| private static final boolean DBG = true; |
| private static final boolean VDBG = false; |
| |
| private CloseGuard mCloseGuard; |
| |
| /** |
| * Intent used to broadcast the change in connection state of the profile. |
| * |
| * <p>This intent will have 3 extras: |
| * |
| * <ul> |
| * <li>{@link #EXTRA_STATE} - The current state of the profile. |
| * <li>{@link #EXTRA_PREVIOUS_STATE}- The previous state of the profile. |
| * <li>{@link BluetoothDevice#EXTRA_DEVICE} - The remote device. |
| * </ul> |
| * |
| * <p>{@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} can be any of {@link |
| * #STATE_DISCONNECTED}, {@link #STATE_CONNECTING}, {@link #STATE_CONNECTED}, {@link |
| * #STATE_DISCONNECTING}. |
| * |
| * @hide |
| */ |
| @SystemApi |
| @RequiresLegacyBluetoothPermission |
| @RequiresBluetoothConnectPermission |
| @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) |
| @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) |
| @SuppressLint("ActionValue") |
| public static final String ACTION_CONNECTION_STATE_CHANGED = |
| "android.bluetooth.sap.profile.action.CONNECTION_STATE_CHANGED"; |
| |
| /** |
| * There was an error trying to obtain the state. |
| * |
| * @hide |
| */ |
| public static final int STATE_ERROR = -1; |
| |
| /** |
| * Connection state change succeeded. |
| * |
| * @hide |
| */ |
| public static final int RESULT_SUCCESS = 1; |
| |
| /** |
| * Connection canceled before completion. |
| * |
| * @hide |
| */ |
| public static final int RESULT_CANCELED = 2; |
| |
| private final BluetoothAdapter mAdapter; |
| private final AttributionSource mAttributionSource; |
| |
| private IBluetoothSap mService; |
| |
| /** Create a BluetoothSap proxy object. */ |
| /* package */ BluetoothSap(Context context, BluetoothAdapter adapter) { |
| if (DBG) Log.d(TAG, "Create BluetoothSap proxy object"); |
| mAdapter = adapter; |
| mAttributionSource = adapter.getAttributionSource(); |
| mService = null; |
| mCloseGuard = new CloseGuard(); |
| mCloseGuard.open("close"); |
| } |
| |
| /** @hide */ |
| @SuppressWarnings("Finalize") // TODO(b/314811467) |
| protected void finalize() { |
| if (mCloseGuard != null) { |
| mCloseGuard.warnIfOpen(); |
| } |
| close(); |
| } |
| |
| /** |
| * Close the connection to the backing service. Other public functions of BluetoothSap will |
| * return default error results once close() has been called. Multiple invocations of close() |
| * are ok. |
| * |
| * @hide |
| */ |
| @Override |
| public synchronized void close() { |
| mAdapter.closeProfileProxy(this); |
| } |
| |
| /** @hide */ |
| @Override |
| public void onServiceConnected(IBinder service) { |
| mService = IBluetoothSap.Stub.asInterface(service); |
| } |
| |
| /** @hide */ |
| @Override |
| public void onServiceDisconnected() { |
| mService = null; |
| } |
| |
| private IBluetoothSap getService() { |
| return mService; |
| } |
| |
| /** @hide */ |
| @Override |
| public BluetoothAdapter getAdapter() { |
| return mAdapter; |
| } |
| |
| /** |
| * Get the current state of the BluetoothSap service. |
| * |
| * @return One of the STATE_ return codes, or STATE_ERROR if this proxy object is currently not |
| * connected to the Sap service. |
| * @hide |
| */ |
| @RequiresBluetoothConnectPermission |
| @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) |
| public int getState() { |
| if (VDBG) log("getState()"); |
| final IBluetoothSap service = getService(); |
| final int defaultValue = BluetoothSap.STATE_ERROR; |
| if (service == null) { |
| Log.w(TAG, "Proxy not attached to service"); |
| if (DBG) log(Log.getStackTraceString(new Throwable())); |
| } else if (isEnabled()) { |
| try { |
| final SynchronousResultReceiver<Integer> recv = SynchronousResultReceiver.get(); |
| service.getState(mAttributionSource, recv); |
| return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue); |
| } catch (RemoteException | TimeoutException e) { |
| Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); |
| } |
| } |
| return defaultValue; |
| } |
| |
| /** |
| * Get the currently connected remote Bluetooth device (PCE). |
| * |
| * @return The remote Bluetooth device, or null if not in connected or connecting state, or if |
| * this proxy object is not connected to the Sap service. |
| * @hide |
| */ |
| @RequiresBluetoothConnectPermission |
| @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) |
| public BluetoothDevice getClient() { |
| if (VDBG) log("getClient()"); |
| final IBluetoothSap service = getService(); |
| final BluetoothDevice defaultValue = null; |
| if (service == null) { |
| Log.w(TAG, "Proxy not attached to service"); |
| if (DBG) log(Log.getStackTraceString(new Throwable())); |
| } else if (isEnabled()) { |
| try { |
| final SynchronousResultReceiver<BluetoothDevice> recv = |
| SynchronousResultReceiver.get(); |
| service.getClient(mAttributionSource, recv); |
| return Attributable.setAttributionSource( |
| recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue), |
| mAttributionSource); |
| } catch (RemoteException | TimeoutException e) { |
| Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); |
| } |
| } |
| return defaultValue; |
| } |
| |
| /** |
| * Returns true if the specified Bluetooth device is connected. Returns false if not connected, |
| * or if this proxy object is not currently connected to the Sap service. |
| * |
| * @hide |
| */ |
| @RequiresBluetoothConnectPermission |
| @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) |
| public boolean isConnected(BluetoothDevice device) { |
| if (VDBG) log("isConnected(" + device + ")"); |
| final IBluetoothSap service = getService(); |
| final boolean defaultValue = false; |
| if (service == null) { |
| Log.w(TAG, "Proxy not attached to service"); |
| if (DBG) log(Log.getStackTraceString(new Throwable())); |
| } else if (isEnabled()) { |
| try { |
| final SynchronousResultReceiver<Boolean> recv = SynchronousResultReceiver.get(); |
| service.isConnected(device, mAttributionSource, recv); |
| return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue); |
| } catch (RemoteException | TimeoutException e) { |
| Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); |
| } |
| } |
| return defaultValue; |
| } |
| |
| /** |
| * Initiate connection. Initiation of outgoing connections is not supported for SAP server. |
| * |
| * @hide |
| */ |
| @RequiresNoPermission |
| public boolean connect(BluetoothDevice device) { |
| if (DBG) log("connect(" + device + ")" + "not supported for SAPS"); |
| return false; |
| } |
| |
| /** |
| * Initiate disconnect. |
| * |
| * @param device Remote Bluetooth Device |
| * @return false on error, true otherwise |
| * @hide |
| */ |
| @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553) |
| @RequiresBluetoothConnectPermission |
| @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) |
| public boolean disconnect(BluetoothDevice device) { |
| if (DBG) log("disconnect(" + device + ")"); |
| final IBluetoothSap service = getService(); |
| final boolean defaultValue = false; |
| if (service == null) { |
| Log.w(TAG, "Proxy not attached to service"); |
| if (DBG) log(Log.getStackTraceString(new Throwable())); |
| } else if (isEnabled() && isValidDevice(device)) { |
| try { |
| final SynchronousResultReceiver<Boolean> recv = SynchronousResultReceiver.get(); |
| service.disconnect(device, mAttributionSource, recv); |
| return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue); |
| } catch (RemoteException | TimeoutException e) { |
| Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); |
| } |
| } |
| return defaultValue; |
| } |
| |
| /** |
| * Get the list of connected devices. Currently at most one. |
| * |
| * @return list of connected devices |
| * @hide |
| */ |
| @RequiresBluetoothConnectPermission |
| @RequiresPermission(Manifest.permission.BLUETOOTH_CONNECT) |
| public List<BluetoothDevice> getConnectedDevices() { |
| if (DBG) log("getConnectedDevices()"); |
| final IBluetoothSap service = getService(); |
| final List<BluetoothDevice> defaultValue = new ArrayList<BluetoothDevice>(); |
| if (service == null) { |
| Log.w(TAG, "Proxy not attached to service"); |
| if (DBG) log(Log.getStackTraceString(new Throwable())); |
| } else if (isEnabled()) { |
| try { |
| final SynchronousResultReceiver<List<BluetoothDevice>> recv = |
| SynchronousResultReceiver.get(); |
| service.getConnectedDevices(mAttributionSource, recv); |
| return Attributable.setAttributionSource( |
| recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue), |
| mAttributionSource); |
| } catch (RemoteException | TimeoutException e) { |
| Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); |
| } |
| } |
| return defaultValue; |
| } |
| |
| /** |
| * Get the list of devices matching specified states. Currently at most one. |
| * |
| * @return list of matching devices |
| * @hide |
| */ |
| @RequiresBluetoothConnectPermission |
| @RequiresPermission(Manifest.permission.BLUETOOTH_CONNECT) |
| public List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) { |
| if (DBG) log("getDevicesMatchingStates()"); |
| final IBluetoothSap service = getService(); |
| final List<BluetoothDevice> defaultValue = new ArrayList<BluetoothDevice>(); |
| if (service == null) { |
| Log.w(TAG, "Proxy not attached to service"); |
| if (DBG) log(Log.getStackTraceString(new Throwable())); |
| } else if (isEnabled()) { |
| try { |
| final SynchronousResultReceiver<List<BluetoothDevice>> recv = |
| SynchronousResultReceiver.get(); |
| service.getDevicesMatchingConnectionStates(states, mAttributionSource, recv); |
| return Attributable.setAttributionSource( |
| recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue), |
| mAttributionSource); |
| } catch (RemoteException | TimeoutException e) { |
| Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); |
| } |
| } |
| return defaultValue; |
| } |
| |
| /** |
| * There are several instances of IpcDataCache used in this class. BluetoothCache wraps up the |
| * common code. All caches are created with a maximum of eight entries, and the key is in the |
| * bluetooth module. The name is set to the api. |
| */ |
| private static class BluetoothCache<Q, R> extends IpcDataCache<Q, R> { |
| BluetoothCache(String api, IpcDataCache.QueryHandler query) { |
| super(8, IpcDataCache.MODULE_BLUETOOTH, api, api, query); |
| } |
| } |
| ; |
| |
| /** @hide */ |
| public void disableBluetoothGetConnectionStateCache() { |
| sBluetoothConnectionCache.disableForCurrentProcess(); |
| } |
| |
| /** @hide */ |
| public static void invalidateBluetoothGetConnectionStateCache() { |
| invalidateCache(GET_CONNECTION_STATE_API); |
| } |
| |
| /** |
| * Invalidate a bluetooth cache. This method is just a short-hand wrapper that enforces the |
| * bluetooth module. |
| */ |
| private static void invalidateCache(@NonNull String api) { |
| IpcDataCache.invalidateCache(IpcDataCache.MODULE_BLUETOOTH, api); |
| } |
| |
| private static final IpcDataCache.QueryHandler< |
| Pair<IBinder, Pair<AttributionSource, BluetoothDevice>>, Integer> |
| sBluetoothConnectionQuery = |
| new IpcDataCache.QueryHandler<>() { |
| @RequiresBluetoothConnectPermission |
| @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) |
| @Override |
| public Integer apply( |
| Pair<IBinder, Pair<AttributionSource, BluetoothDevice>> pairQuery) { |
| IBluetoothSap service = IBluetoothSap.Stub.asInterface(pairQuery.first); |
| AttributionSource source = pairQuery.second.first; |
| BluetoothDevice device = pairQuery.second.second; |
| if (DBG) { |
| log( |
| "getConnectionState(" |
| + device.getAnonymizedAddress() |
| + ") uncached"); |
| } |
| final SynchronousResultReceiver<Integer> recv = |
| SynchronousResultReceiver.get(); |
| try { |
| service.getConnectionState(device, source, recv); |
| return recv.awaitResultNoInterrupt(getSyncTimeout()) |
| .getValue(BluetoothProfile.STATE_DISCONNECTED); |
| } catch (RemoteException | TimeoutException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| }; |
| |
| private static final String GET_CONNECTION_STATE_API = "BluetoothSap_getConnectionState"; |
| |
| private static final BluetoothCache< |
| Pair<IBinder, Pair<AttributionSource, BluetoothDevice>>, Integer> |
| sBluetoothConnectionCache = |
| new BluetoothCache<>(GET_CONNECTION_STATE_API, sBluetoothConnectionQuery); |
| |
| /** |
| * Get connection state of device |
| * |
| * @return device connection state |
| * @hide |
| */ |
| @RequiresBluetoothConnectPermission |
| @RequiresPermission(Manifest.permission.BLUETOOTH_CONNECT) |
| public int getConnectionState(BluetoothDevice device) { |
| if (DBG) log("getConnectionState(" + device + ")"); |
| final IBluetoothSap service = getService(); |
| if (service == null) { |
| Log.w(TAG, "BT not enabled. Cannot get connection state"); |
| if (DBG) log(Log.getStackTraceString(new Throwable())); |
| } else if (isEnabled() && isValidDevice(device)) { |
| try { |
| return sBluetoothConnectionCache.query( |
| new Pair<>(service.asBinder(), new Pair<>(mAttributionSource, device))); |
| } catch (RuntimeException e) { |
| if (!(e.getCause() instanceof TimeoutException) |
| && !(e.getCause() instanceof RemoteException)) { |
| throw e; |
| } |
| Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); |
| } |
| } |
| return BluetoothProfile.STATE_DISCONNECTED; |
| } |
| |
| /** |
| * Set priority of the profile |
| * |
| * <p>The device should already be paired. Priority can be one of {@link #PRIORITY_ON} or {@link |
| * #PRIORITY_OFF}, |
| * |
| * @param device Paired bluetooth device |
| * @return true if priority is set, false on error |
| * @hide |
| */ |
| @RequiresBluetoothConnectPermission |
| @RequiresPermission( |
| allOf = { |
| android.Manifest.permission.BLUETOOTH_CONNECT, |
| android.Manifest.permission.BLUETOOTH_PRIVILEGED, |
| }) |
| public boolean setPriority(BluetoothDevice device, int priority) { |
| if (DBG) log("setPriority(" + device + ", " + priority + ")"); |
| return setConnectionPolicy(device, BluetoothAdapter.priorityToConnectionPolicy(priority)); |
| } |
| |
| /** |
| * Set connection policy of the profile |
| * |
| * <p>The device should already be paired. Connection policy can be one of {@link |
| * #CONNECTION_POLICY_ALLOWED}, {@link #CONNECTION_POLICY_FORBIDDEN}, {@link |
| * #CONNECTION_POLICY_UNKNOWN} |
| * |
| * @param device Paired bluetooth device |
| * @param connectionPolicy is the connection policy to set to for this profile |
| * @return true if connectionPolicy is set, false on error |
| * @throws NullPointerException if device is null |
| * @hide |
| */ |
| @SystemApi |
| @RequiresBluetoothConnectPermission |
| @RequiresPermission( |
| allOf = { |
| android.Manifest.permission.BLUETOOTH_CONNECT, |
| android.Manifest.permission.BLUETOOTH_PRIVILEGED, |
| }) |
| public boolean setConnectionPolicy( |
| @NonNull BluetoothDevice device, @ConnectionPolicy int connectionPolicy) { |
| if (DBG) log("setConnectionPolicy(" + device + ", " + connectionPolicy + ")"); |
| Objects.requireNonNull(device, "BluetoothDevice cannot be null"); |
| final IBluetoothSap service = getService(); |
| final boolean defaultValue = false; |
| if (service == null) { |
| Log.w(TAG, "Proxy not attached to service"); |
| if (DBG) log(Log.getStackTraceString(new Throwable())); |
| } else if (isEnabled() |
| && isValidDevice(device) |
| && (connectionPolicy == BluetoothProfile.CONNECTION_POLICY_FORBIDDEN |
| || connectionPolicy == BluetoothProfile.CONNECTION_POLICY_ALLOWED)) { |
| try { |
| final SynchronousResultReceiver<Boolean> recv = SynchronousResultReceiver.get(); |
| service.setConnectionPolicy(device, connectionPolicy, mAttributionSource, recv); |
| return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue); |
| } catch (RemoteException | TimeoutException e) { |
| Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); |
| } |
| } |
| return defaultValue; |
| } |
| |
| /** |
| * Get the priority of the profile. |
| * |
| * <p>The priority can be any of: {@link #PRIORITY_OFF}, {@link #PRIORITY_ON}, {@link |
| * #PRIORITY_UNDEFINED} |
| * |
| * @param device Bluetooth device |
| * @return priority of the device |
| * @hide |
| */ |
| @RequiresBluetoothConnectPermission |
| @RequiresPermission( |
| allOf = { |
| android.Manifest.permission.BLUETOOTH_CONNECT, |
| android.Manifest.permission.BLUETOOTH_PRIVILEGED, |
| }) |
| public int getPriority(BluetoothDevice device) { |
| if (VDBG) log("getPriority(" + device + ")"); |
| return BluetoothAdapter.connectionPolicyToPriority(getConnectionPolicy(device)); |
| } |
| |
| /** |
| * Get the connection policy of the profile. |
| * |
| * <p>The connection policy can be any of: {@link #CONNECTION_POLICY_ALLOWED}, {@link |
| * #CONNECTION_POLICY_FORBIDDEN}, {@link #CONNECTION_POLICY_UNKNOWN} |
| * |
| * @param device Bluetooth device |
| * @return connection policy of the device |
| * @throws NullPointerException if device is null |
| * @hide |
| */ |
| @SystemApi |
| @RequiresBluetoothConnectPermission |
| @RequiresPermission( |
| allOf = { |
| android.Manifest.permission.BLUETOOTH_CONNECT, |
| android.Manifest.permission.BLUETOOTH_PRIVILEGED, |
| }) |
| public @ConnectionPolicy int getConnectionPolicy(@NonNull BluetoothDevice device) { |
| if (VDBG) log("getConnectionPolicy(" + device + ")"); |
| Objects.requireNonNull(device, "BluetoothDevice cannot be null"); |
| final IBluetoothSap service = getService(); |
| final int defaultValue = BluetoothProfile.CONNECTION_POLICY_FORBIDDEN; |
| if (service == null) { |
| Log.w(TAG, "Proxy not attached to service"); |
| if (DBG) log(Log.getStackTraceString(new Throwable())); |
| } else if (isEnabled() && isValidDevice(device)) { |
| try { |
| final SynchronousResultReceiver<Integer> recv = SynchronousResultReceiver.get(); |
| service.getConnectionPolicy(device, mAttributionSource, recv); |
| return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue); |
| } catch (RemoteException | TimeoutException e) { |
| Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); |
| } |
| } |
| return defaultValue; |
| } |
| |
| private static void log(String msg) { |
| Log.d(TAG, msg); |
| } |
| |
| private boolean isEnabled() { |
| return mAdapter.isEnabled(); |
| } |
| |
| private static boolean isValidDevice(BluetoothDevice device) { |
| return device != null && BluetoothAdapter.checkBluetoothAddress(device.getAddress()); |
| } |
| } |
