| /* |
| * Copyright (C) 2014 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; |
| |
| import android.Manifest.permission; |
| import android.annotation.Nullable; |
| import android.content.BroadcastReceiver; |
| import android.content.ComponentName; |
| import android.content.ContentResolver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.content.ServiceConnection; |
| import android.content.pm.PackageManager; |
| import android.content.pm.PackageManagerInternal; |
| import android.database.ContentObserver; |
| import android.location.LocationManager; |
| import android.net.INetworkRecommendationProvider; |
| import android.net.INetworkScoreCache; |
| import android.net.INetworkScoreService; |
| import android.net.NetworkKey; |
| import android.net.NetworkScoreManager; |
| import android.net.NetworkScorerAppData; |
| import android.net.ScoredNetwork; |
| import android.net.Uri; |
| import android.net.wifi.ScanResult; |
| import android.net.wifi.WifiInfo; |
| import android.net.wifi.WifiManager; |
| import android.net.wifi.WifiScanner; |
| import android.os.Binder; |
| import android.os.Build; |
| import android.os.Handler; |
| import android.os.IBinder; |
| import android.os.Looper; |
| import android.os.Message; |
| import android.os.RemoteCallbackList; |
| import android.os.RemoteException; |
| import android.os.UserHandle; |
| import android.provider.Settings.Global; |
| import android.text.TextUtils; |
| import android.util.ArrayMap; |
| import android.util.ArraySet; |
| import android.util.IntArray; |
| import android.util.Log; |
| |
| import com.android.internal.annotations.GuardedBy; |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.internal.content.PackageMonitor; |
| import com.android.internal.os.TransferPipe; |
| import com.android.internal.telephony.SmsApplication; |
| import com.android.internal.util.DumpUtils; |
| |
| import java.io.FileDescriptor; |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.function.BiConsumer; |
| import java.util.function.Function; |
| import java.util.function.Supplier; |
| import java.util.function.UnaryOperator; |
| |
| /** |
| * Backing service for {@link android.net.NetworkScoreManager}. |
| * @hide |
| */ |
| public class NetworkScoreService extends INetworkScoreService.Stub { |
| private static final String TAG = "NetworkScoreService"; |
| private static final boolean DBG = Build.IS_DEBUGGABLE && Log.isLoggable(TAG, Log.DEBUG); |
| private static final boolean VERBOSE = Build.IS_DEBUGGABLE && Log.isLoggable(TAG, Log.VERBOSE); |
| |
| private final Context mContext; |
| private final NetworkScorerAppManager mNetworkScorerAppManager; |
| @GuardedBy("mScoreCaches") |
| private final Map<Integer, RemoteCallbackList<INetworkScoreCache>> mScoreCaches; |
| /** Lock used to update mPackageMonitor when scorer package changes occur. */ |
| private final Object mPackageMonitorLock = new Object(); |
| private final Object mServiceConnectionLock = new Object(); |
| private final Handler mHandler; |
| private final DispatchingContentObserver mRecommendationSettingsObserver; |
| private final ContentObserver mUseOpenWifiPackageObserver; |
| private final Function<NetworkScorerAppData, ScoringServiceConnection> mServiceConnProducer; |
| |
| @GuardedBy("mPackageMonitorLock") |
| private NetworkScorerPackageMonitor mPackageMonitor; |
| @GuardedBy("mServiceConnectionLock") |
| private ScoringServiceConnection mServiceConnection; |
| |
| private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| final String action = intent.getAction(); |
| final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); |
| if (DBG) Log.d(TAG, "Received " + action + " for userId " + userId); |
| if (userId == UserHandle.USER_NULL) return; |
| |
| if (Intent.ACTION_USER_UNLOCKED.equals(action)) { |
| onUserUnlocked(userId); |
| } |
| } |
| }; |
| |
| private BroadcastReceiver mLocationModeReceiver = new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| final String action = intent.getAction(); |
| if (LocationManager.MODE_CHANGED_ACTION.equals(action)) { |
| refreshBinding(); |
| } |
| } |
| }; |
| |
| public static final class Lifecycle extends SystemService { |
| private final NetworkScoreService mService; |
| |
| public Lifecycle(Context context) { |
| super(context); |
| mService = new NetworkScoreService(context); |
| } |
| |
| @Override |
| public void onStart() { |
| Log.i(TAG, "Registering " + Context.NETWORK_SCORE_SERVICE); |
| publishBinderService(Context.NETWORK_SCORE_SERVICE, mService); |
| } |
| |
| @Override |
| public void onBootPhase(int phase) { |
| if (phase == PHASE_SYSTEM_SERVICES_READY) { |
| mService.systemReady(); |
| } else if (phase == PHASE_BOOT_COMPLETED) { |
| mService.systemRunning(); |
| } |
| } |
| } |
| |
| /** |
| * Clears scores when the active scorer package is no longer valid and |
| * manages the service connection. |
| */ |
| private class NetworkScorerPackageMonitor extends PackageMonitor { |
| final String mPackageToWatch; |
| |
| private NetworkScorerPackageMonitor(String packageToWatch) { |
| mPackageToWatch = packageToWatch; |
| } |
| |
| @Override |
| public void onPackageAdded(String packageName, int uid) { |
| evaluateBinding(packageName, true /* forceUnbind */); |
| } |
| |
| @Override |
| public void onPackageRemoved(String packageName, int uid) { |
| evaluateBinding(packageName, true /* forceUnbind */); |
| } |
| |
| @Override |
| public void onPackageModified(String packageName) { |
| evaluateBinding(packageName, false /* forceUnbind */); |
| } |
| |
| @Override |
| public boolean onHandleForceStop(Intent intent, String[] packages, int uid, boolean doit) { |
| if (doit) { // "doit" means the force stop happened instead of just being queried for. |
| for (String packageName : packages) { |
| evaluateBinding(packageName, true /* forceUnbind */); |
| } |
| } |
| return super.onHandleForceStop(intent, packages, uid, doit); |
| } |
| |
| @Override |
| public void onPackageUpdateFinished(String packageName, int uid) { |
| evaluateBinding(packageName, true /* forceUnbind */); |
| } |
| |
| private void evaluateBinding(String changedPackageName, boolean forceUnbind) { |
| if (!mPackageToWatch.equals(changedPackageName)) { |
| // Early exit when we don't care about the package that has changed. |
| return; |
| } |
| |
| if (DBG) { |
| Log.d(TAG, "Evaluating binding for: " + changedPackageName |
| + ", forceUnbind=" + forceUnbind); |
| } |
| |
| final NetworkScorerAppData activeScorer = mNetworkScorerAppManager.getActiveScorer(); |
| if (activeScorer == null) { |
| // Package change has invalidated a scorer, this will also unbind any service |
| // connection. |
| if (DBG) Log.d(TAG, "No active scorers available."); |
| refreshBinding(); |
| } else { // The scoring service changed in some way. |
| if (forceUnbind) { |
| unbindFromScoringServiceIfNeeded(); |
| } |
| if (DBG) { |
| Log.d(TAG, "Binding to " + activeScorer.getRecommendationServiceComponent() |
| + " if needed."); |
| } |
| bindToScoringServiceIfNeeded(activeScorer); |
| } |
| } |
| } |
| |
| /** |
| * Dispatches observed content changes to a handler for further processing. |
| */ |
| @VisibleForTesting |
| public static class DispatchingContentObserver extends ContentObserver { |
| final private Map<Uri, Integer> mUriEventMap; |
| final private Context mContext; |
| final private Handler mHandler; |
| |
| public DispatchingContentObserver(Context context, Handler handler) { |
| super(handler); |
| mContext = context; |
| mHandler = handler; |
| mUriEventMap = new ArrayMap<>(); |
| } |
| |
| void observe(Uri uri, int what) { |
| mUriEventMap.put(uri, what); |
| final ContentResolver resolver = mContext.getContentResolver(); |
| resolver.registerContentObserver(uri, false /*notifyForDescendants*/, this); |
| } |
| |
| @Override |
| public void onChange(boolean selfChange) { |
| onChange(selfChange, null); |
| } |
| |
| @Override |
| public void onChange(boolean selfChange, Uri uri) { |
| if (DBG) Log.d(TAG, String.format("onChange(%s, %s)", selfChange, uri)); |
| final Integer what = mUriEventMap.get(uri); |
| if (what != null) { |
| mHandler.obtainMessage(what).sendToTarget(); |
| } else { |
| Log.w(TAG, "No matching event to send for URI = " + uri); |
| } |
| } |
| } |
| |
| public NetworkScoreService(Context context) { |
| this(context, new NetworkScorerAppManager(context), |
| ScoringServiceConnection::new, Looper.myLooper()); |
| } |
| |
| @VisibleForTesting |
| NetworkScoreService(Context context, NetworkScorerAppManager networkScoreAppManager, |
| Function<NetworkScorerAppData, ScoringServiceConnection> serviceConnProducer, |
| Looper looper) { |
| mContext = context; |
| mNetworkScorerAppManager = networkScoreAppManager; |
| mScoreCaches = new ArrayMap<>(); |
| IntentFilter filter = new IntentFilter(Intent.ACTION_USER_UNLOCKED); |
| // TODO: Need to update when we support per-user scorers. http://b/23422763 |
| mContext.registerReceiverAsUser( |
| mUserIntentReceiver, UserHandle.SYSTEM, filter, null /* broadcastPermission*/, |
| null /* scheduler */); |
| mHandler = new ServiceHandler(looper); |
| IntentFilter locationModeFilter = new IntentFilter(LocationManager.MODE_CHANGED_ACTION); |
| mContext.registerReceiverAsUser( |
| mLocationModeReceiver, UserHandle.SYSTEM, locationModeFilter, |
| null /* broadcastPermission*/, mHandler); |
| mRecommendationSettingsObserver = new DispatchingContentObserver(context, mHandler); |
| mServiceConnProducer = serviceConnProducer; |
| mUseOpenWifiPackageObserver = new ContentObserver(mHandler) { |
| @Override |
| public void onChange(boolean selfChange, Uri uri, int userId) { |
| Uri useOpenWifiPkgUri = Global.getUriFor(Global.USE_OPEN_WIFI_PACKAGE); |
| if (useOpenWifiPkgUri.equals(uri)) { |
| String useOpenWifiPackage = Global.getString(mContext.getContentResolver(), |
| Global.USE_OPEN_WIFI_PACKAGE); |
| if (!TextUtils.isEmpty(useOpenWifiPackage)) { |
| LocalServices.getService(PackageManagerInternal.class) |
| .grantDefaultPermissionsToDefaultUseOpenWifiApp(useOpenWifiPackage, |
| userId); |
| } |
| } |
| } |
| }; |
| mContext.getContentResolver().registerContentObserver( |
| Global.getUriFor(Global.USE_OPEN_WIFI_PACKAGE), |
| false /*notifyForDescendants*/, |
| mUseOpenWifiPackageObserver); |
| // Set a callback for the package manager to query the use open wifi app. |
| LocalServices.getService(PackageManagerInternal.class).setUseOpenWifiAppPackagesProvider( |
| new PackageManagerInternal.PackagesProvider() { |
| @Override |
| public String[] getPackages(int userId) { |
| String useOpenWifiPackage = Global.getString(mContext.getContentResolver(), |
| Global.USE_OPEN_WIFI_PACKAGE); |
| if (!TextUtils.isEmpty(useOpenWifiPackage)) { |
| return new String[]{useOpenWifiPackage}; |
| } |
| return null; |
| } |
| }); |
| } |
| |
| /** Called when the system is ready to run third-party code but before it actually does so. */ |
| void systemReady() { |
| if (DBG) Log.d(TAG, "systemReady"); |
| registerRecommendationSettingsObserver(); |
| } |
| |
| /** Called when the system is ready for us to start third-party code. */ |
| void systemRunning() { |
| if (DBG) Log.d(TAG, "systemRunning"); |
| } |
| |
| @VisibleForTesting |
| void onUserUnlocked(int userId) { |
| if (DBG) Log.d(TAG, "onUserUnlocked(" + userId + ")"); |
| refreshBinding(); |
| } |
| |
| private void refreshBinding() { |
| if (DBG) Log.d(TAG, "refreshBinding()"); |
| // Make sure the scorer is up-to-date |
| mNetworkScorerAppManager.updateState(); |
| mNetworkScorerAppManager.migrateNetworkScorerAppSettingIfNeeded(); |
| registerPackageMonitorIfNeeded(); |
| bindToScoringServiceIfNeeded(); |
| } |
| |
| private void registerRecommendationSettingsObserver() { |
| final Uri packageNameUri = Global.getUriFor(Global.NETWORK_RECOMMENDATIONS_PACKAGE); |
| mRecommendationSettingsObserver.observe(packageNameUri, |
| ServiceHandler.MSG_RECOMMENDATIONS_PACKAGE_CHANGED); |
| |
| final Uri settingUri = Global.getUriFor(Global.NETWORK_RECOMMENDATIONS_ENABLED); |
| mRecommendationSettingsObserver.observe(settingUri, |
| ServiceHandler.MSG_RECOMMENDATION_ENABLED_SETTING_CHANGED); |
| } |
| |
| /** |
| * Ensures the package manager is registered to monitor the current active scorer. |
| * If a discrepancy is found any previous monitor will be cleaned up |
| * and a new monitor will be created. |
| * |
| * This method is idempotent. |
| */ |
| private void registerPackageMonitorIfNeeded() { |
| if (DBG) Log.d(TAG, "registerPackageMonitorIfNeeded()"); |
| final NetworkScorerAppData appData = mNetworkScorerAppManager.getActiveScorer(); |
| synchronized (mPackageMonitorLock) { |
| // Unregister the current monitor if needed. |
| if (mPackageMonitor != null && (appData == null |
| || !appData.getRecommendationServicePackageName().equals( |
| mPackageMonitor.mPackageToWatch))) { |
| if (DBG) { |
| Log.d(TAG, "Unregistering package monitor for " |
| + mPackageMonitor.mPackageToWatch); |
| } |
| mPackageMonitor.unregister(); |
| mPackageMonitor = null; |
| } |
| |
| // Create and register the monitor if a scorer is active. |
| if (appData != null && mPackageMonitor == null) { |
| mPackageMonitor = new NetworkScorerPackageMonitor( |
| appData.getRecommendationServicePackageName()); |
| // TODO: Need to update when we support per-user scorers. http://b/23422763 |
| mPackageMonitor.register(mContext, null /* thread */, UserHandle.SYSTEM, |
| false /* externalStorage */); |
| if (DBG) { |
| Log.d(TAG, "Registered package monitor for " |
| + mPackageMonitor.mPackageToWatch); |
| } |
| } |
| } |
| } |
| |
| private void bindToScoringServiceIfNeeded() { |
| if (DBG) Log.d(TAG, "bindToScoringServiceIfNeeded"); |
| NetworkScorerAppData scorerData = mNetworkScorerAppManager.getActiveScorer(); |
| bindToScoringServiceIfNeeded(scorerData); |
| } |
| |
| /** |
| * Ensures the service connection is bound to the current active scorer. |
| * If a discrepancy is found any previous connection will be cleaned up |
| * and a new connection will be created. |
| * |
| * This method is idempotent. |
| */ |
| private void bindToScoringServiceIfNeeded(NetworkScorerAppData appData) { |
| if (DBG) Log.d(TAG, "bindToScoringServiceIfNeeded(" + appData + ")"); |
| if (appData != null) { |
| synchronized (mServiceConnectionLock) { |
| // If we're connected to a different component then drop it. |
| if (mServiceConnection != null |
| && !mServiceConnection.getAppData().equals(appData)) { |
| unbindFromScoringServiceIfNeeded(); |
| } |
| |
| // If we're not connected at all then create a new connection. |
| if (mServiceConnection == null) { |
| mServiceConnection = mServiceConnProducer.apply(appData); |
| } |
| |
| // Make sure the connection is connected (idempotent) |
| mServiceConnection.bind(mContext); |
| } |
| } else { // otherwise make sure it isn't bound. |
| unbindFromScoringServiceIfNeeded(); |
| } |
| } |
| |
| private void unbindFromScoringServiceIfNeeded() { |
| if (DBG) Log.d(TAG, "unbindFromScoringServiceIfNeeded"); |
| synchronized (mServiceConnectionLock) { |
| if (mServiceConnection != null) { |
| mServiceConnection.unbind(mContext); |
| if (DBG) Log.d(TAG, "Disconnected from: " |
| + mServiceConnection.getAppData().getRecommendationServiceComponent()); |
| } |
| mServiceConnection = null; |
| } |
| clearInternal(); |
| } |
| |
| @Override |
| public boolean updateScores(ScoredNetwork[] networks) { |
| if (!isCallerActiveScorer(getCallingUid())) { |
| throw new SecurityException("Caller with UID " + getCallingUid() + |
| " is not the active scorer."); |
| } |
| |
| final long token = Binder.clearCallingIdentity(); |
| try { |
| // Separate networks by type. |
| Map<Integer, List<ScoredNetwork>> networksByType = new ArrayMap<>(); |
| for (ScoredNetwork network : networks) { |
| List<ScoredNetwork> networkList = networksByType.get(network.networkKey.type); |
| if (networkList == null) { |
| networkList = new ArrayList<>(); |
| networksByType.put(network.networkKey.type, networkList); |
| } |
| networkList.add(network); |
| } |
| |
| // Pass the scores of each type down to the appropriate network scorer. |
| for (final Map.Entry<Integer, List<ScoredNetwork>> entry : networksByType.entrySet()) { |
| final RemoteCallbackList<INetworkScoreCache> callbackList; |
| final boolean isEmpty; |
| synchronized (mScoreCaches) { |
| callbackList = mScoreCaches.get(entry.getKey()); |
| isEmpty = callbackList == null |
| || callbackList.getRegisteredCallbackCount() == 0; |
| } |
| |
| if (isEmpty) { |
| if (Log.isLoggable(TAG, Log.VERBOSE)) { |
| Log.v(TAG, "No scorer registered for type " + entry.getKey() |
| + ", discarding"); |
| } |
| continue; |
| } |
| |
| final BiConsumer<INetworkScoreCache, Object> consumer = |
| FilteringCacheUpdatingConsumer.create(mContext, entry.getValue(), |
| entry.getKey()); |
| sendCacheUpdateCallback(consumer, Collections.singleton(callbackList)); |
| } |
| |
| return true; |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| |
| /** |
| * A {@link BiConsumer} implementation that filters the given {@link ScoredNetwork} |
| * list (if needed) before invoking {@link INetworkScoreCache#updateScores(List)} on the |
| * accepted {@link INetworkScoreCache} implementation. |
| */ |
| @VisibleForTesting |
| static class FilteringCacheUpdatingConsumer |
| implements BiConsumer<INetworkScoreCache, Object> { |
| private final Context mContext; |
| private final List<ScoredNetwork> mScoredNetworkList; |
| private final int mNetworkType; |
| // TODO: 1/23/17 - Consider a Map if we implement more filters. |
| // These are created on-demand to defer the construction cost until |
| // an instance is actually needed. |
| private UnaryOperator<List<ScoredNetwork>> mCurrentNetworkFilter; |
| private UnaryOperator<List<ScoredNetwork>> mScanResultsFilter; |
| |
| static FilteringCacheUpdatingConsumer create(Context context, |
| List<ScoredNetwork> scoredNetworkList, int networkType) { |
| return new FilteringCacheUpdatingConsumer(context, scoredNetworkList, networkType, |
| null, null); |
| } |
| |
| @VisibleForTesting |
| FilteringCacheUpdatingConsumer(Context context, |
| List<ScoredNetwork> scoredNetworkList, int networkType, |
| UnaryOperator<List<ScoredNetwork>> currentNetworkFilter, |
| UnaryOperator<List<ScoredNetwork>> scanResultsFilter) { |
| mContext = context; |
| mScoredNetworkList = scoredNetworkList; |
| mNetworkType = networkType; |
| mCurrentNetworkFilter = currentNetworkFilter; |
| mScanResultsFilter = scanResultsFilter; |
| } |
| |
| @Override |
| public void accept(INetworkScoreCache networkScoreCache, Object cookie) { |
| int filterType = NetworkScoreManager.CACHE_FILTER_NONE; |
| if (cookie instanceof Integer) { |
| filterType = (Integer) cookie; |
| } |
| |
| try { |
| final List<ScoredNetwork> filteredNetworkList = |
| filterScores(mScoredNetworkList, filterType); |
| if (!filteredNetworkList.isEmpty()) { |
| networkScoreCache.updateScores(filteredNetworkList); |
| } |
| } catch (RemoteException e) { |
| if (VERBOSE) { |
| Log.v(TAG, "Unable to update scores of type " + mNetworkType, e); |
| } |
| } |
| } |
| |
| /** |
| * Applies the appropriate filter and returns the filtered results. |
| */ |
| private List<ScoredNetwork> filterScores(List<ScoredNetwork> scoredNetworkList, |
| int filterType) { |
| switch (filterType) { |
| case NetworkScoreManager.CACHE_FILTER_NONE: |
| return scoredNetworkList; |
| |
| case NetworkScoreManager.CACHE_FILTER_CURRENT_NETWORK: |
| if (mCurrentNetworkFilter == null) { |
| mCurrentNetworkFilter = |
| new CurrentNetworkScoreCacheFilter(new WifiInfoSupplier(mContext)); |
| } |
| return mCurrentNetworkFilter.apply(scoredNetworkList); |
| |
| case NetworkScoreManager.CACHE_FILTER_SCAN_RESULTS: |
| if (mScanResultsFilter == null) { |
| mScanResultsFilter = new ScanResultsScoreCacheFilter( |
| new ScanResultsSupplier(mContext)); |
| } |
| return mScanResultsFilter.apply(scoredNetworkList); |
| |
| default: |
| Log.w(TAG, "Unknown filter type: " + filterType); |
| return scoredNetworkList; |
| } |
| } |
| } |
| |
| /** |
| * Helper class that improves the testability of the cache filter Functions. |
| */ |
| private static class WifiInfoSupplier implements Supplier<WifiInfo> { |
| private final Context mContext; |
| |
| WifiInfoSupplier(Context context) { |
| mContext = context; |
| } |
| |
| @Override |
| public WifiInfo get() { |
| WifiManager wifiManager = mContext.getSystemService(WifiManager.class); |
| if (wifiManager != null) { |
| return wifiManager.getConnectionInfo(); |
| } |
| Log.w(TAG, "WifiManager is null, failed to return the WifiInfo."); |
| return null; |
| } |
| } |
| |
| /** |
| * Helper class that improves the testability of the cache filter Functions. |
| */ |
| private static class ScanResultsSupplier implements Supplier<List<ScanResult>> { |
| private final Context mContext; |
| |
| ScanResultsSupplier(Context context) { |
| mContext = context; |
| } |
| |
| @Override |
| public List<ScanResult> get() { |
| WifiScanner wifiScanner = mContext.getSystemService(WifiScanner.class); |
| if (wifiScanner != null) { |
| return wifiScanner.getSingleScanResults(); |
| } |
| Log.w(TAG, "WifiScanner is null, failed to return scan results."); |
| return Collections.emptyList(); |
| } |
| } |
| |
| /** |
| * Filters the given set of {@link ScoredNetwork}s and returns a new List containing only the |
| * {@link ScoredNetwork} associated with the current network. If no network is connected the |
| * returned list will be empty. |
| * <p> |
| * Note: this filter performs some internal caching for consistency and performance. The |
| * current network is determined at construction time and never changed. Also, the |
| * last filtered list is saved so if the same input is provided multiple times in a row |
| * the computation is only done once. |
| */ |
| @VisibleForTesting |
| static class CurrentNetworkScoreCacheFilter implements UnaryOperator<List<ScoredNetwork>> { |
| private final NetworkKey mCurrentNetwork; |
| |
| CurrentNetworkScoreCacheFilter(Supplier<WifiInfo> wifiInfoSupplier) { |
| mCurrentNetwork = NetworkKey.createFromWifiInfo(wifiInfoSupplier.get()); |
| } |
| |
| @Override |
| public List<ScoredNetwork> apply(List<ScoredNetwork> scoredNetworks) { |
| if (mCurrentNetwork == null || scoredNetworks.isEmpty()) { |
| return Collections.emptyList(); |
| } |
| |
| for (int i = 0; i < scoredNetworks.size(); i++) { |
| final ScoredNetwork scoredNetwork = scoredNetworks.get(i); |
| if (scoredNetwork.networkKey.equals(mCurrentNetwork)) { |
| return Collections.singletonList(scoredNetwork); |
| } |
| } |
| |
| return Collections.emptyList(); |
| } |
| } |
| |
| /** |
| * Filters the given set of {@link ScoredNetwork}s and returns a new List containing only the |
| * {@link ScoredNetwork} associated with the current set of {@link ScanResult}s. |
| * If there are no {@link ScanResult}s the returned list will be empty. |
| * <p> |
| * Note: this filter performs some internal caching for consistency and performance. The |
| * current set of ScanResults is determined at construction time and never changed. |
| * Also, the last filtered list is saved so if the same input is provided multiple |
| * times in a row the computation is only done once. |
| */ |
| @VisibleForTesting |
| static class ScanResultsScoreCacheFilter implements UnaryOperator<List<ScoredNetwork>> { |
| private final Set<NetworkKey> mScanResultKeys; |
| |
| ScanResultsScoreCacheFilter(Supplier<List<ScanResult>> resultsSupplier) { |
| List<ScanResult> scanResults = resultsSupplier.get(); |
| final int size = scanResults.size(); |
| mScanResultKeys = new ArraySet<>(size); |
| for (int i = 0; i < size; i++) { |
| ScanResult scanResult = scanResults.get(i); |
| NetworkKey key = NetworkKey.createFromScanResult(scanResult); |
| if (key != null) { |
| mScanResultKeys.add(key); |
| } |
| } |
| } |
| |
| @Override |
| public List<ScoredNetwork> apply(List<ScoredNetwork> scoredNetworks) { |
| if (mScanResultKeys.isEmpty() || scoredNetworks.isEmpty()) { |
| return Collections.emptyList(); |
| } |
| |
| List<ScoredNetwork> filteredScores = new ArrayList<>(); |
| for (int i = 0; i < scoredNetworks.size(); i++) { |
| final ScoredNetwork scoredNetwork = scoredNetworks.get(i); |
| if (mScanResultKeys.contains(scoredNetwork.networkKey)) { |
| filteredScores.add(scoredNetwork); |
| } |
| } |
| |
| return filteredScores; |
| } |
| } |
| |
| @Override |
| public boolean clearScores() { |
| // Only the active scorer or the system should be allowed to flush all scores. |
| enforceSystemOrIsActiveScorer(getCallingUid()); |
| final long token = Binder.clearCallingIdentity(); |
| try { |
| clearInternal(); |
| return true; |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| |
| @Override |
| public boolean setActiveScorer(String packageName) { |
| enforceSystemOrHasScoreNetworks(); |
| return mNetworkScorerAppManager.setActiveScorer(packageName); |
| } |
| |
| /** |
| * Determine whether the application with the given UID is the enabled scorer. |
| * |
| * @param callingUid the UID to check |
| * @return true if the provided UID is the active scorer, false otherwise. |
| */ |
| @Override |
| public boolean isCallerActiveScorer(int callingUid) { |
| synchronized (mServiceConnectionLock) { |
| return mServiceConnection != null |
| && mServiceConnection.getAppData().packageUid == callingUid; |
| } |
| } |
| |
| private void enforceSystemOnly() throws SecurityException { |
| // REQUEST_NETWORK_SCORES is a signature only permission. |
| mContext.enforceCallingOrSelfPermission(permission.REQUEST_NETWORK_SCORES, |
| "Caller must be granted REQUEST_NETWORK_SCORES."); |
| } |
| |
| private void enforceSystemOrHasScoreNetworks() throws SecurityException { |
| if (mContext.checkCallingOrSelfPermission(permission.REQUEST_NETWORK_SCORES) |
| != PackageManager.PERMISSION_GRANTED |
| && mContext.checkCallingOrSelfPermission(permission.SCORE_NETWORKS) |
| != PackageManager.PERMISSION_GRANTED) { |
| throw new SecurityException( |
| "Caller is neither the system process or a network scorer."); |
| } |
| } |
| |
| private void enforceSystemOrIsActiveScorer(int callingUid) throws SecurityException { |
| if (mContext.checkCallingOrSelfPermission(permission.REQUEST_NETWORK_SCORES) |
| != PackageManager.PERMISSION_GRANTED |
| && !isCallerActiveScorer(callingUid)) { |
| throw new SecurityException( |
| "Caller is neither the system process or the active network scorer."); |
| } |
| } |
| |
| /** |
| * Obtain the package name of the current active network scorer. |
| * |
| * @return the full package name of the current active scorer, or null if there is no active |
| * scorer. |
| */ |
| @Override |
| public String getActiveScorerPackage() { |
| enforceSystemOrHasScoreNetworks(); |
| synchronized (mServiceConnectionLock) { |
| if (mServiceConnection != null) { |
| return mServiceConnection.getPackageName(); |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Returns metadata about the active scorer or <code>null</code> if there is no active scorer. |
| */ |
| @Override |
| public NetworkScorerAppData getActiveScorer() { |
| // Only the system can access this data. |
| enforceSystemOnly(); |
| synchronized (mServiceConnectionLock) { |
| if (mServiceConnection != null) { |
| return mServiceConnection.getAppData(); |
| } |
| } |
| |
| return null; |
| } |
| |
| /** |
| * Returns the list of available scorer apps. The list will be empty if there are |
| * no valid scorers. |
| */ |
| @Override |
| public List<NetworkScorerAppData> getAllValidScorers() { |
| // Only the system can access this data. |
| enforceSystemOnly(); |
| return mNetworkScorerAppManager.getAllValidScorers(); |
| } |
| |
| @Override |
| public void disableScoring() { |
| // Only the active scorer or the system should be allowed to disable scoring. |
| enforceSystemOrIsActiveScorer(getCallingUid()); |
| // no-op for now but we could write to the setting if needed. |
| } |
| |
| /** Clear scores. Callers are responsible for checking permissions as appropriate. */ |
| private void clearInternal() { |
| sendCacheUpdateCallback(new BiConsumer<INetworkScoreCache, Object>() { |
| @Override |
| public void accept(INetworkScoreCache networkScoreCache, Object cookie) { |
| try { |
| networkScoreCache.clearScores(); |
| } catch (RemoteException e) { |
| if (Log.isLoggable(TAG, Log.VERBOSE)) { |
| Log.v(TAG, "Unable to clear scores", e); |
| } |
| } |
| } |
| }, getScoreCacheLists()); |
| } |
| |
| @Override |
| public void registerNetworkScoreCache(int networkType, |
| INetworkScoreCache scoreCache, |
| int filterType) { |
| enforceSystemOnly(); |
| final long token = Binder.clearCallingIdentity(); |
| try { |
| synchronized (mScoreCaches) { |
| RemoteCallbackList<INetworkScoreCache> callbackList = mScoreCaches.get(networkType); |
| if (callbackList == null) { |
| callbackList = new RemoteCallbackList<>(); |
| mScoreCaches.put(networkType, callbackList); |
| } |
| if (!callbackList.register(scoreCache, filterType)) { |
| if (callbackList.getRegisteredCallbackCount() == 0) { |
| mScoreCaches.remove(networkType); |
| } |
| if (Log.isLoggable(TAG, Log.VERBOSE)) { |
| Log.v(TAG, "Unable to register NetworkScoreCache for type " + networkType); |
| } |
| } |
| } |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| |
| @Override |
| public void unregisterNetworkScoreCache(int networkType, INetworkScoreCache scoreCache) { |
| enforceSystemOnly(); |
| final long token = Binder.clearCallingIdentity(); |
| try { |
| synchronized (mScoreCaches) { |
| RemoteCallbackList<INetworkScoreCache> callbackList = mScoreCaches.get(networkType); |
| if (callbackList == null || !callbackList.unregister(scoreCache)) { |
| if (Log.isLoggable(TAG, Log.VERBOSE)) { |
| Log.v(TAG, "Unable to unregister NetworkScoreCache for type " |
| + networkType); |
| } |
| } else if (callbackList.getRegisteredCallbackCount() == 0) { |
| mScoreCaches.remove(networkType); |
| } |
| } |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| |
| @Override |
| public boolean requestScores(NetworkKey[] networks) { |
| enforceSystemOnly(); |
| final long token = Binder.clearCallingIdentity(); |
| try { |
| final INetworkRecommendationProvider provider = getRecommendationProvider(); |
| if (provider != null) { |
| try { |
| provider.requestScores(networks); |
| // TODO: 12/15/16 - Consider pushing null scores into the cache to |
| // prevent repeated requests for the same scores. |
| return true; |
| } catch (RemoteException e) { |
| Log.w(TAG, "Failed to request scores.", e); |
| // TODO: 12/15/16 - Keep track of failures. |
| } |
| } |
| return false; |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| |
| @Override |
| protected void dump(final FileDescriptor fd, final PrintWriter writer, final String[] args) { |
| if (!DumpUtils.checkDumpPermission(mContext, TAG, writer)) return; |
| final long token = Binder.clearCallingIdentity(); |
| try { |
| NetworkScorerAppData currentScorer = mNetworkScorerAppManager.getActiveScorer(); |
| if (currentScorer == null) { |
| writer.println("Scoring is disabled."); |
| return; |
| } |
| writer.println("Current scorer: " + currentScorer); |
| |
| sendCacheUpdateCallback(new BiConsumer<INetworkScoreCache, Object>() { |
| @Override |
| public void accept(INetworkScoreCache networkScoreCache, Object cookie) { |
| try { |
| TransferPipe.dumpAsync(networkScoreCache.asBinder(), fd, args); |
| } catch (IOException | RemoteException e) { |
| writer.println("Failed to dump score cache: " + e); |
| } |
| } |
| }, getScoreCacheLists()); |
| |
| synchronized (mServiceConnectionLock) { |
| if (mServiceConnection != null) { |
| mServiceConnection.dump(fd, writer, args); |
| } else { |
| writer.println("ScoringServiceConnection: null"); |
| } |
| } |
| writer.flush(); |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| |
| /** |
| * Returns a {@link Collection} of all {@link RemoteCallbackList}s that are currently active. |
| * |
| * <p>May be used to perform an action on all score caches without potentially strange behavior |
| * if a new scorer is registered during that action's execution. |
| */ |
| private Collection<RemoteCallbackList<INetworkScoreCache>> getScoreCacheLists() { |
| synchronized (mScoreCaches) { |
| return new ArrayList<>(mScoreCaches.values()); |
| } |
| } |
| |
| private void sendCacheUpdateCallback(BiConsumer<INetworkScoreCache, Object> consumer, |
| Collection<RemoteCallbackList<INetworkScoreCache>> remoteCallbackLists) { |
| for (RemoteCallbackList<INetworkScoreCache> callbackList : remoteCallbackLists) { |
| synchronized (callbackList) { // Ensure only one active broadcast per RemoteCallbackList |
| final int count = callbackList.beginBroadcast(); |
| try { |
| for (int i = 0; i < count; i++) { |
| consumer.accept(callbackList.getBroadcastItem(i), |
| callbackList.getBroadcastCookie(i)); |
| } |
| } finally { |
| callbackList.finishBroadcast(); |
| } |
| } |
| } |
| } |
| |
| @Nullable |
| private INetworkRecommendationProvider getRecommendationProvider() { |
| synchronized (mServiceConnectionLock) { |
| if (mServiceConnection != null) { |
| return mServiceConnection.getRecommendationProvider(); |
| } |
| } |
| return null; |
| } |
| |
| // The class and methods need to be public for Mockito to work. |
| @VisibleForTesting |
| public static class ScoringServiceConnection implements ServiceConnection { |
| private final NetworkScorerAppData mAppData; |
| private volatile boolean mBound = false; |
| private volatile boolean mConnected = false; |
| private volatile INetworkRecommendationProvider mRecommendationProvider; |
| |
| ScoringServiceConnection(NetworkScorerAppData appData) { |
| mAppData = appData; |
| } |
| |
| @VisibleForTesting |
| public void bind(Context context) { |
| if (!mBound) { |
| Intent service = new Intent(NetworkScoreManager.ACTION_RECOMMEND_NETWORKS); |
| service.setComponent(mAppData.getRecommendationServiceComponent()); |
| mBound = context.bindServiceAsUser(service, this, |
| Context.BIND_AUTO_CREATE | Context.BIND_FOREGROUND_SERVICE, |
| UserHandle.SYSTEM); |
| if (!mBound) { |
| Log.w(TAG, "Bind call failed for " + service); |
| context.unbindService(this); |
| } else { |
| if (DBG) Log.d(TAG, "ScoringServiceConnection bound."); |
| } |
| } |
| } |
| |
| @VisibleForTesting |
| public void unbind(Context context) { |
| try { |
| if (mBound) { |
| mBound = false; |
| context.unbindService(this); |
| if (DBG) Log.d(TAG, "ScoringServiceConnection unbound."); |
| } |
| } catch (RuntimeException e) { |
| Log.e(TAG, "Unbind failed.", e); |
| } |
| |
| mConnected = false; |
| mRecommendationProvider = null; |
| } |
| |
| @VisibleForTesting |
| public NetworkScorerAppData getAppData() { |
| return mAppData; |
| } |
| |
| @VisibleForTesting |
| public INetworkRecommendationProvider getRecommendationProvider() { |
| return mRecommendationProvider; |
| } |
| |
| @VisibleForTesting |
| public String getPackageName() { |
| return mAppData.getRecommendationServiceComponent().getPackageName(); |
| } |
| |
| @VisibleForTesting |
| public boolean isAlive() { |
| return mBound && mConnected; |
| } |
| |
| @Override |
| public void onServiceConnected(ComponentName name, IBinder service) { |
| if (DBG) Log.d(TAG, "ScoringServiceConnection: " + name.flattenToString()); |
| mConnected = true; |
| mRecommendationProvider = INetworkRecommendationProvider.Stub.asInterface(service); |
| } |
| |
| @Override |
| public void onServiceDisconnected(ComponentName name) { |
| if (DBG) { |
| Log.d(TAG, "ScoringServiceConnection, disconnected: " + name.flattenToString()); |
| } |
| mConnected = false; |
| mRecommendationProvider = null; |
| } |
| |
| public void dump(FileDescriptor fd, PrintWriter writer, String[] args) { |
| writer.println("ScoringServiceConnection: " |
| + mAppData.getRecommendationServiceComponent() |
| + ", bound: " + mBound |
| + ", connected: " + mConnected); |
| } |
| } |
| |
| @VisibleForTesting |
| public final class ServiceHandler extends Handler { |
| public static final int MSG_RECOMMENDATIONS_PACKAGE_CHANGED = 1; |
| public static final int MSG_RECOMMENDATION_ENABLED_SETTING_CHANGED = 2; |
| |
| public ServiceHandler(Looper looper) { |
| super(looper); |
| } |
| |
| @Override |
| public void handleMessage(Message msg) { |
| final int what = msg.what; |
| switch (what) { |
| case MSG_RECOMMENDATIONS_PACKAGE_CHANGED: |
| case MSG_RECOMMENDATION_ENABLED_SETTING_CHANGED: |
| refreshBinding(); |
| break; |
| |
| default: |
| Log.w(TAG,"Unknown message: " + what); |
| } |
| } |
| } |
| } |
