| /* |
| * Copyright (C) 2016 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.server.tv; |
| |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.ServiceConnection; |
| import android.media.tv.ITvRemoteProvider; |
| import android.media.tv.ITvRemoteServiceInput; |
| import android.os.Binder; |
| import android.os.IBinder; |
| import android.os.RemoteException; |
| import android.os.UserHandle; |
| import android.util.Log; |
| import android.util.Slog; |
| |
| import java.io.PrintWriter; |
| import java.lang.ref.WeakReference; |
| |
| /** |
| * Maintains a connection to a tv remote provider service. |
| */ |
| final class TvRemoteProviderProxy implements ServiceConnection { |
| private static final String TAG = "TvRemoteProvProxy"; // max. 23 chars |
| private static final boolean DEBUG = Log.isLoggable(TAG, Log.VERBOSE); |
| private static final boolean DEBUG_KEY = false; |
| |
| |
| // This should match TvRemoteProvider.ACTION_TV_REMOTE_PROVIDER |
| protected static final String SERVICE_INTERFACE = |
| "com.android.media.tv.remoteprovider.TvRemoteProvider"; |
| private final Context mContext; |
| private final ComponentName mComponentName; |
| private final int mUserId; |
| private final int mUid; |
| |
| /** |
| * State guarded by mLock. |
| * This is the first lock in sequence for an incoming call. |
| * The second lock is always {@link TvRemoteService#mLock} |
| * |
| * There are currently no methods that break this sequence. |
| */ |
| private final Object mLock = new Object(); |
| |
| private ProviderMethods mProviderMethods; |
| // Connection state |
| private boolean mRunning; |
| private boolean mBound; |
| private Connection mActiveConnection; |
| |
| TvRemoteProviderProxy(Context context, ProviderMethods provider, |
| ComponentName componentName, int userId, int uid) { |
| mContext = context; |
| mProviderMethods = provider; |
| mComponentName = componentName; |
| mUserId = userId; |
| mUid = uid; |
| } |
| |
| public void dump(PrintWriter pw, String prefix) { |
| pw.println(prefix + "Proxy"); |
| pw.println(prefix + " mUserId=" + mUserId); |
| pw.println(prefix + " mRunning=" + mRunning); |
| pw.println(prefix + " mBound=" + mBound); |
| pw.println(prefix + " mActiveConnection=" + mActiveConnection); |
| } |
| |
| public boolean hasComponentName(String packageName, String className) { |
| return mComponentName.getPackageName().equals(packageName) |
| && mComponentName.getClassName().equals(className); |
| } |
| |
| public void start() { |
| if (!mRunning) { |
| if (DEBUG) { |
| Slog.d(TAG, this + ": Starting"); |
| } |
| |
| mRunning = true; |
| bind(); |
| } |
| } |
| |
| public void stop() { |
| if (mRunning) { |
| if (DEBUG) { |
| Slog.d(TAG, this + ": Stopping"); |
| } |
| |
| mRunning = false; |
| unbind(); |
| } |
| } |
| |
| public void rebindIfDisconnected() { |
| synchronized (mLock) { |
| if (mActiveConnection == null && mRunning) { |
| unbind(); |
| bind(); |
| } |
| } |
| } |
| |
| private void bind() { |
| if (!mBound) { |
| if (DEBUG) { |
| Slog.d(TAG, this + ": Binding"); |
| } |
| |
| Intent service = new Intent(SERVICE_INTERFACE); |
| service.setComponent(mComponentName); |
| try { |
| mBound = mContext.bindServiceAsUser(service, this, |
| Context.BIND_AUTO_CREATE | Context.BIND_FOREGROUND_SERVICE, |
| new UserHandle(mUserId)); |
| if (!mBound && DEBUG) { |
| Slog.d(TAG, this + ": Bind failed"); |
| } |
| } catch (SecurityException ex) { |
| if (DEBUG) { |
| Slog.d(TAG, this + ": Bind failed", ex); |
| } |
| } |
| } |
| } |
| |
| private void unbind() { |
| if (mBound) { |
| if (DEBUG) { |
| Slog.d(TAG, this + ": Unbinding"); |
| } |
| |
| mBound = false; |
| disconnect(); |
| mContext.unbindService(this); |
| } |
| } |
| |
| @Override |
| public void onServiceConnected(ComponentName name, IBinder service) { |
| if (DEBUG) { |
| Slog.d(TAG, this + ": onServiceConnected()"); |
| } |
| |
| if (mBound) { |
| disconnect(); |
| |
| ITvRemoteProvider provider = ITvRemoteProvider.Stub.asInterface(service); |
| if (provider != null) { |
| Connection connection = new Connection(provider); |
| if (connection.register()) { |
| synchronized (mLock) { |
| mActiveConnection = connection; |
| } |
| if (DEBUG) { |
| Slog.d(TAG, this + ": Connected successfully."); |
| } |
| } else { |
| if (DEBUG) { |
| Slog.d(TAG, this + ": Registration failed"); |
| } |
| } |
| } else { |
| Slog.e(TAG, this + ": Service returned invalid remote-control provider binder"); |
| } |
| } |
| } |
| |
| @Override |
| public void onServiceDisconnected(ComponentName name) { |
| if (DEBUG) Slog.d(TAG, this + ": Service disconnected"); |
| disconnect(); |
| } |
| |
| private void disconnect() { |
| synchronized (mLock) { |
| if (mActiveConnection != null) { |
| mActiveConnection.dispose(); |
| mActiveConnection = null; |
| } |
| } |
| } |
| |
| interface ProviderMethods { |
| // InputBridge |
| boolean openInputBridge(TvRemoteProviderProxy provider, IBinder token, String name, |
| int width, int height, int maxPointers); |
| |
| void closeInputBridge(TvRemoteProviderProxy provider, IBinder token); |
| |
| void clearInputBridge(TvRemoteProviderProxy provider, IBinder token); |
| |
| void sendKeyDown(TvRemoteProviderProxy provider, IBinder token, int keyCode); |
| |
| void sendKeyUp(TvRemoteProviderProxy provider, IBinder token, int keyCode); |
| |
| void sendPointerDown(TvRemoteProviderProxy provider, IBinder token, int pointerId, int x, |
| int y); |
| |
| void sendPointerUp(TvRemoteProviderProxy provider, IBinder token, int pointerId); |
| |
| void sendPointerSync(TvRemoteProviderProxy provider, IBinder token); |
| } |
| |
| private final class Connection { |
| private final ITvRemoteProvider mTvRemoteProvider; |
| private final RemoteServiceInputProvider mServiceInputProvider; |
| |
| public Connection(ITvRemoteProvider provider) { |
| mTvRemoteProvider = provider; |
| mServiceInputProvider = new RemoteServiceInputProvider(this); |
| } |
| |
| public boolean register() { |
| if (DEBUG) Slog.d(TAG, "Connection::register()"); |
| try { |
| mTvRemoteProvider.setRemoteServiceInputSink(mServiceInputProvider); |
| return true; |
| } catch (RemoteException ex) { |
| dispose(); |
| return false; |
| } |
| } |
| |
| public void dispose() { |
| if (DEBUG) Slog.d(TAG, "Connection::dispose()"); |
| mServiceInputProvider.dispose(); |
| } |
| |
| |
| public void onInputBridgeConnected(IBinder token) { |
| if (DEBUG) Slog.d(TAG, this + ": onInputBridgeConnected"); |
| try { |
| mTvRemoteProvider.onInputBridgeConnected(token); |
| } catch (RemoteException ex) { |
| Slog.e(TAG, "Failed to deliver onInputBridgeConnected. ", ex); |
| } |
| } |
| |
| void openInputBridge(final IBinder token, final String name, final int width, |
| final int height, final int maxPointers) { |
| synchronized (mLock) { |
| if (mActiveConnection == this && Binder.getCallingUid() == mUid) { |
| if (DEBUG) { |
| Slog.d(TAG, this + ": openInputBridge," + |
| " token=" + token + ", name=" + name); |
| } |
| final long idToken = Binder.clearCallingIdentity(); |
| try { |
| if (mProviderMethods.openInputBridge(TvRemoteProviderProxy.this, token, |
| name, width, height, maxPointers)) { |
| onInputBridgeConnected(token); |
| } |
| } finally { |
| Binder.restoreCallingIdentity(idToken); |
| } |
| } else { |
| if (DEBUG) { |
| Slog.w(TAG, |
| "openInputBridge, Invalid connection or incorrect uid: " + Binder |
| .getCallingUid()); |
| } |
| } |
| } |
| } |
| |
| void closeInputBridge(final IBinder token) { |
| synchronized (mLock) { |
| if (mActiveConnection == this && Binder.getCallingUid() == mUid) { |
| if (DEBUG) { |
| Slog.d(TAG, this + ": closeInputBridge," + |
| " token=" + token); |
| } |
| final long idToken = Binder.clearCallingIdentity(); |
| try { |
| mProviderMethods.closeInputBridge(TvRemoteProviderProxy.this, token); |
| } finally { |
| Binder.restoreCallingIdentity(idToken); |
| } |
| } else { |
| if (DEBUG) { |
| Slog.w(TAG, |
| "closeInputBridge, Invalid connection or incorrect uid: " + |
| Binder.getCallingUid()); |
| } |
| } |
| } |
| } |
| |
| void clearInputBridge(final IBinder token) { |
| synchronized (mLock) { |
| if (mActiveConnection == this && Binder.getCallingUid() == mUid) { |
| if (DEBUG) { |
| Slog.d(TAG, this + ": clearInputBridge," + |
| " token=" + token); |
| } |
| final long idToken = Binder.clearCallingIdentity(); |
| try { |
| mProviderMethods.clearInputBridge(TvRemoteProviderProxy.this, token); |
| } finally { |
| Binder.restoreCallingIdentity(idToken); |
| } |
| } else { |
| if (DEBUG) { |
| Slog.w(TAG, |
| "clearInputBridge, Invalid connection or incorrect uid: " + |
| Binder.getCallingUid()); |
| } |
| } |
| } |
| } |
| |
| void sendTimestamp(final IBinder token, final long timestamp) { |
| if (DEBUG) { |
| Slog.e(TAG, "sendTimestamp is deprecated, please remove all usages of this API."); |
| } |
| } |
| |
| void sendKeyDown(final IBinder token, final int keyCode) { |
| synchronized (mLock) { |
| if (mActiveConnection == this && Binder.getCallingUid() == mUid) { |
| if (DEBUG_KEY) { |
| Slog.d(TAG, this + ": sendKeyDown," + |
| " token=" + token + ", keyCode=" + keyCode); |
| } |
| final long idToken = Binder.clearCallingIdentity(); |
| try { |
| mProviderMethods.sendKeyDown(TvRemoteProviderProxy.this, token, keyCode); |
| } finally { |
| Binder.restoreCallingIdentity(idToken); |
| } |
| } else { |
| if (DEBUG) { |
| Slog.w(TAG, |
| "sendKeyDown, Invalid connection or incorrect uid: " + Binder |
| .getCallingUid()); |
| } |
| } |
| } |
| } |
| |
| void sendKeyUp(final IBinder token, final int keyCode) { |
| synchronized (mLock) { |
| if (mActiveConnection == this && Binder.getCallingUid() == mUid) { |
| if (DEBUG_KEY) { |
| Slog.d(TAG, this + ": sendKeyUp," + |
| " token=" + token + ", keyCode=" + keyCode); |
| } |
| final long idToken = Binder.clearCallingIdentity(); |
| try { |
| mProviderMethods.sendKeyUp(TvRemoteProviderProxy.this, token, keyCode); |
| } finally { |
| Binder.restoreCallingIdentity(idToken); |
| } |
| } else { |
| if (DEBUG) { |
| Slog.w(TAG, |
| "sendKeyUp, Invalid connection or incorrect uid: " + Binder |
| .getCallingUid()); |
| } |
| } |
| } |
| } |
| |
| void sendPointerDown(final IBinder token, final int pointerId, final int x, final int y) { |
| synchronized (mLock) { |
| if (mActiveConnection == this && Binder.getCallingUid() == mUid) { |
| if (DEBUG_KEY) { |
| Slog.d(TAG, this + ": sendPointerDown," + |
| " token=" + token + ", pointerId=" + pointerId); |
| } |
| final long idToken = Binder.clearCallingIdentity(); |
| try { |
| mProviderMethods.sendPointerDown(TvRemoteProviderProxy.this, token, |
| pointerId, x, y); |
| } finally { |
| Binder.restoreCallingIdentity(idToken); |
| } |
| } else { |
| if (DEBUG) { |
| Slog.w(TAG, |
| "sendPointerDown, Invalid connection or incorrect uid: " + Binder |
| .getCallingUid()); |
| } |
| } |
| } |
| } |
| |
| void sendPointerUp(final IBinder token, final int pointerId) { |
| synchronized (mLock) { |
| if (mActiveConnection == this && Binder.getCallingUid() == mUid) { |
| if (DEBUG_KEY) { |
| Slog.d(TAG, this + ": sendPointerUp," + |
| " token=" + token + ", pointerId=" + pointerId); |
| } |
| final long idToken = Binder.clearCallingIdentity(); |
| try { |
| mProviderMethods.sendPointerUp(TvRemoteProviderProxy.this, token, |
| pointerId); |
| } finally { |
| Binder.restoreCallingIdentity(idToken); |
| } |
| } else { |
| if (DEBUG) { |
| Slog.w(TAG, |
| "sendPointerUp, Invalid connection or incorrect uid: " + Binder |
| .getCallingUid()); |
| } |
| } |
| } |
| } |
| |
| void sendPointerSync(final IBinder token) { |
| synchronized (mLock) { |
| if (mActiveConnection == this && Binder.getCallingUid() == mUid) { |
| if (DEBUG_KEY) { |
| Slog.d(TAG, this + ": sendPointerSync," + |
| " token=" + token); |
| } |
| final long idToken = Binder.clearCallingIdentity(); |
| try { |
| if (mProviderMethods != null) { |
| mProviderMethods.sendPointerSync(TvRemoteProviderProxy.this, token); |
| } |
| } finally { |
| Binder.restoreCallingIdentity(idToken); |
| } |
| } else { |
| if (DEBUG) { |
| Slog.w(TAG, |
| "sendPointerSync, Invalid connection or incorrect uid: " + Binder |
| .getCallingUid()); |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Receives events from the connected provider. |
| * <p> |
| * This inner class is static and only retains a weak reference to the connection |
| * to prevent the client from being leaked in case the service is holding an |
| * active reference to the client's callback. |
| * </p> |
| */ |
| private static final class RemoteServiceInputProvider extends ITvRemoteServiceInput.Stub { |
| private final WeakReference<Connection> mConnectionRef; |
| |
| public RemoteServiceInputProvider(Connection connection) { |
| mConnectionRef = new WeakReference<Connection>(connection); |
| } |
| |
| public void dispose() { |
| // Terminate the connection. |
| mConnectionRef.clear(); |
| } |
| |
| @Override |
| public void openInputBridge(IBinder token, String name, int width, |
| int height, int maxPointers) throws RemoteException { |
| Connection connection = mConnectionRef.get(); |
| if (connection != null) { |
| connection.openInputBridge(token, name, width, height, maxPointers); |
| } |
| } |
| |
| @Override |
| public void closeInputBridge(IBinder token) throws RemoteException { |
| Connection connection = mConnectionRef.get(); |
| if (connection != null) { |
| connection.closeInputBridge(token); |
| } |
| } |
| |
| @Override |
| public void clearInputBridge(IBinder token) throws RemoteException { |
| Connection connection = mConnectionRef.get(); |
| if (connection != null) { |
| connection.clearInputBridge(token); |
| } |
| } |
| |
| @Override |
| public void sendTimestamp(IBinder token, long timestamp) throws RemoteException { |
| Connection connection = mConnectionRef.get(); |
| if (connection != null) { |
| connection.sendTimestamp(token, timestamp); |
| } |
| } |
| |
| @Override |
| public void sendKeyDown(IBinder token, int keyCode) throws RemoteException { |
| Connection connection = mConnectionRef.get(); |
| if (connection != null) { |
| connection.sendKeyDown(token, keyCode); |
| } |
| } |
| |
| @Override |
| public void sendKeyUp(IBinder token, int keyCode) throws RemoteException { |
| Connection connection = mConnectionRef.get(); |
| if (connection != null) { |
| connection.sendKeyUp(token, keyCode); |
| } |
| } |
| |
| @Override |
| public void sendPointerDown(IBinder token, int pointerId, int x, int y) |
| throws RemoteException { |
| Connection connection = mConnectionRef.get(); |
| if (connection != null) { |
| connection.sendPointerDown(token, pointerId, x, y); |
| } |
| } |
| |
| @Override |
| public void sendPointerUp(IBinder token, int pointerId) throws RemoteException { |
| Connection connection = mConnectionRef.get(); |
| if (connection != null) { |
| connection.sendPointerUp(token, pointerId); |
| } |
| } |
| |
| @Override |
| public void sendPointerSync(IBinder token) throws RemoteException { |
| Connection connection = mConnectionRef.get(); |
| if (connection != null) { |
| connection.sendPointerSync(token); |
| } |
| } |
| } |
| } |