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-rw-r--r--services/java/com/android/server/ServiceWatcher.java382
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diff --git a/services/java/com/android/server/ServiceWatcher.java b/services/java/com/android/server/ServiceWatcher.java
deleted file mode 100644
index 5c7bfab..0000000
--- a/services/java/com/android/server/ServiceWatcher.java
+++ /dev/null
@@ -1,382 +0,0 @@
-/*
- * 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.server;
-
-import android.content.BroadcastReceiver;
-import android.content.ComponentName;
-import android.content.Context;
-import android.content.Intent;
-import android.content.IntentFilter;
-import android.content.ServiceConnection;
-import android.content.pm.PackageInfo;
-import android.content.pm.PackageManager;
-import android.content.pm.PackageManager.NameNotFoundException;
-import android.content.pm.ResolveInfo;
-import android.content.pm.Signature;
-import android.content.res.Resources;
-import android.os.Handler;
-import android.os.IBinder;
-import android.os.UserHandle;
-import android.util.Log;
-
-import com.android.internal.content.PackageMonitor;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.List;
-
-/**
- * Find the best Service, and bind to it.
- * Handles run-time package changes.
- */
-public class ServiceWatcher implements ServiceConnection {
- private static final boolean D = false;
- public static final String EXTRA_SERVICE_VERSION = "serviceVersion";
- public static final String EXTRA_SERVICE_IS_MULTIUSER = "serviceIsMultiuser";
-
- private final String mTag;
- private final Context mContext;
- private final PackageManager mPm;
- private final List<HashSet<Signature>> mSignatureSets;
- private final String mAction;
-
- /**
- * If mServicePackageName is not null, only this package will be searched for the service that
- * implements mAction. When null, all packages in the system that matches one of the signature
- * in mSignatureSets are searched.
- */
- private final String mServicePackageName;
- private final Runnable mNewServiceWork;
- private final Handler mHandler;
-
- private Object mLock = new Object();
-
- // all fields below synchronized on mLock
- private IBinder mBinder; // connected service
- private String mPackageName; // current best package
- private int mVersion = Integer.MIN_VALUE; // current best version
- /**
- * Whether the currently-connected service is multiuser-aware. This can change at run-time
- * when switching from one version of a service to another.
- */
- private boolean mIsMultiuser = false;
-
- public static ArrayList<HashSet<Signature>> getSignatureSets(Context context,
- List<String> initialPackageNames) {
- PackageManager pm = context.getPackageManager();
- ArrayList<HashSet<Signature>> sigSets = new ArrayList<HashSet<Signature>>();
- for (int i = 0, size = initialPackageNames.size(); i < size; i++) {
- String pkg = initialPackageNames.get(i);
- try {
- HashSet<Signature> set = new HashSet<Signature>();
- Signature[] sigs = pm.getPackageInfo(pkg, PackageManager.GET_SIGNATURES).signatures;
- set.addAll(Arrays.asList(sigs));
- sigSets.add(set);
- } catch (NameNotFoundException e) {
- Log.w("ServiceWatcher", pkg + " not found");
- }
- }
- return sigSets;
- }
-
- public ServiceWatcher(Context context, String logTag, String action,
- int overlaySwitchResId, int defaultServicePackageNameResId,
- int initialPackageNamesResId, Runnable newServiceWork,
- Handler handler) {
- mContext = context;
- mTag = logTag;
- mAction = action;
- mPm = mContext.getPackageManager();
- mNewServiceWork = newServiceWork;
- mHandler = handler;
- Resources resources = context.getResources();
-
- // Whether to enable service overlay.
- boolean enableOverlay = resources.getBoolean(overlaySwitchResId);
- ArrayList<String> initialPackageNames = new ArrayList<String>();
- if (enableOverlay) {
- // A list of package names used to create the signatures.
- String[] pkgs = resources.getStringArray(initialPackageNamesResId);
- if (pkgs != null) initialPackageNames.addAll(Arrays.asList(pkgs));
- mServicePackageName = null;
- if (D) Log.d(mTag, "Overlay enabled, packages=" + Arrays.toString(pkgs));
- } else {
- // The default package name that is searched for service implementation when overlay is
- // disabled.
- String servicePackageName = resources.getString(defaultServicePackageNameResId);
- if (servicePackageName != null) initialPackageNames.add(servicePackageName);
- mServicePackageName = servicePackageName;
- if (D) Log.d(mTag, "Overlay disabled, default package=" + servicePackageName);
- }
- mSignatureSets = getSignatureSets(context, initialPackageNames);
- }
-
- public boolean start() {
- synchronized (mLock) {
- if (!bindBestPackageLocked(mServicePackageName)) return false;
- }
-
- // listen for user change
- IntentFilter intentFilter = new IntentFilter();
- intentFilter.addAction(Intent.ACTION_USER_SWITCHED);
- mContext.registerReceiverAsUser(new BroadcastReceiver() {
- @Override
- public void onReceive(Context context, Intent intent) {
- String action = intent.getAction();
- if (Intent.ACTION_USER_SWITCHED.equals(action)) {
- switchUser();
- }
- }
- }, UserHandle.ALL, intentFilter, null, mHandler);
-
- // listen for relevant package changes if service overlay is enabled.
- if (mServicePackageName == null) {
- mPackageMonitor.register(mContext, null, UserHandle.ALL, true);
- }
-
- return true;
- }
-
- /**
- * Searches and binds to the best package, or do nothing
- * if the best package is already bound.
- * Only checks the named package, or checks all packages if it
- * is null.
- * Return true if a new package was found to bind to.
- */
- private boolean bindBestPackageLocked(String justCheckThisPackage) {
- Intent intent = new Intent(mAction);
- if (justCheckThisPackage != null) {
- intent.setPackage(justCheckThisPackage);
- }
- List<ResolveInfo> rInfos = mPm.queryIntentServicesAsUser(intent,
- PackageManager.GET_META_DATA, UserHandle.USER_OWNER);
- int bestVersion = Integer.MIN_VALUE;
- String bestPackage = null;
- boolean bestIsMultiuser = false;
- if (rInfos != null) {
- for (ResolveInfo rInfo : rInfos) {
- String packageName = rInfo.serviceInfo.packageName;
-
- // check signature
- try {
- PackageInfo pInfo;
- pInfo = mPm.getPackageInfo(packageName, PackageManager.GET_SIGNATURES);
- if (!isSignatureMatch(pInfo.signatures)) {
- Log.w(mTag, packageName + " resolves service " + mAction
- + ", but has wrong signature, ignoring");
- continue;
- }
- } catch (NameNotFoundException e) {
- Log.wtf(mTag, e);
- continue;
- }
-
- // check metadata
- int version = Integer.MIN_VALUE;
- boolean isMultiuser = false;
- if (rInfo.serviceInfo.metaData != null) {
- version = rInfo.serviceInfo.metaData.getInt(
- EXTRA_SERVICE_VERSION, Integer.MIN_VALUE);
- isMultiuser = rInfo.serviceInfo.metaData.getBoolean(EXTRA_SERVICE_IS_MULTIUSER);
- }
-
- if (version > mVersion) {
- bestVersion = version;
- bestPackage = packageName;
- bestIsMultiuser = isMultiuser;
- }
- }
-
- if (D) {
- Log.d(mTag, String.format("bindBestPackage for %s : %s found %d, %s", mAction,
- (justCheckThisPackage == null ? ""
- : "(" + justCheckThisPackage + ") "), rInfos.size(),
- (bestPackage == null ? "no new best package"
- : "new best package: " + bestPackage)));
- }
- } else {
- if (D) Log.d(mTag, "Unable to query intent services for action: " + mAction);
- }
- if (bestPackage != null) {
- bindToPackageLocked(bestPackage, bestVersion, bestIsMultiuser);
- return true;
- }
- return false;
- }
-
- private void unbindLocked() {
- String pkg;
- pkg = mPackageName;
- mPackageName = null;
- mVersion = Integer.MIN_VALUE;
- mIsMultiuser = false;
- if (pkg != null) {
- if (D) Log.d(mTag, "unbinding " + pkg);
- mContext.unbindService(this);
- }
- }
-
- private void bindToPackageLocked(String packageName, int version, boolean isMultiuser) {
- unbindLocked();
- Intent intent = new Intent(mAction);
- intent.setPackage(packageName);
- mPackageName = packageName;
- mVersion = version;
- mIsMultiuser = isMultiuser;
- if (D) Log.d(mTag, "binding " + packageName + " (version " + version + ") ("
- + (isMultiuser ? "multi" : "single") + "-user)");
- mContext.bindServiceAsUser(intent, this, Context.BIND_AUTO_CREATE | Context.BIND_NOT_FOREGROUND
- | Context.BIND_NOT_VISIBLE, mIsMultiuser ? UserHandle.OWNER : UserHandle.CURRENT);
- }
-
- public static boolean isSignatureMatch(Signature[] signatures,
- List<HashSet<Signature>> sigSets) {
- if (signatures == null) return false;
-
- // build hashset of input to test against
- HashSet<Signature> inputSet = new HashSet<Signature>();
- for (Signature s : signatures) {
- inputSet.add(s);
- }
-
- // test input against each of the signature sets
- for (HashSet<Signature> referenceSet : sigSets) {
- if (referenceSet.equals(inputSet)) {
- return true;
- }
- }
- return false;
- }
-
- private boolean isSignatureMatch(Signature[] signatures) {
- return isSignatureMatch(signatures, mSignatureSets);
- }
-
- private final PackageMonitor mPackageMonitor = new PackageMonitor() {
- /**
- * Called when package has been reinstalled
- */
- @Override
- public void onPackageUpdateFinished(String packageName, int uid) {
- synchronized (mLock) {
- if (packageName.equals(mPackageName)) {
- // package updated, make sure to rebind
- unbindLocked();
- }
- // Need to check all packages because this method is also called when a
- // system app is uninstalled and the stock version in reinstalled.
- bindBestPackageLocked(null);
- }
- }
-
- @Override
- public void onPackageAdded(String packageName, int uid) {
- synchronized (mLock) {
- if (packageName.equals(mPackageName)) {
- // package updated, make sure to rebind
- unbindLocked();
- }
- // check the new package is case it is better
- bindBestPackageLocked(null);
- }
- }
-
- @Override
- public void onPackageRemoved(String packageName, int uid) {
- synchronized (mLock) {
- if (packageName.equals(mPackageName)) {
- unbindLocked();
- // the currently bound package was removed,
- // need to search for a new package
- bindBestPackageLocked(null);
- }
- }
- }
-
- @Override
- public boolean onPackageChanged(String packageName, int uid, String[] components) {
- synchronized (mLock) {
- if (packageName.equals(mPackageName)) {
- // service enabled or disabled, make sure to rebind
- unbindLocked();
- }
- // the service might be disabled, need to search for a new
- // package
- bindBestPackageLocked(null);
- }
- return super.onPackageChanged(packageName, uid, components);
- }
- };
-
- @Override
- public void onServiceConnected(ComponentName name, IBinder binder) {
- synchronized (mLock) {
- String packageName = name.getPackageName();
- if (packageName.equals(mPackageName)) {
- if (D) Log.d(mTag, packageName + " connected");
- mBinder = binder;
- if (mHandler !=null && mNewServiceWork != null) {
- mHandler.post(mNewServiceWork);
- }
- } else {
- Log.w(mTag, "unexpected onServiceConnected: " + packageName);
- }
- }
- }
-
- @Override
- public void onServiceDisconnected(ComponentName name) {
- synchronized (mLock) {
- String packageName = name.getPackageName();
- if (D) Log.d(mTag, packageName + " disconnected");
-
- if (packageName.equals(mPackageName)) {
- mBinder = null;
- }
- }
- }
-
- public String getBestPackageName() {
- synchronized (mLock) {
- return mPackageName;
- }
- }
-
- public int getBestVersion() {
- synchronized (mLock) {
- return mVersion;
- }
- }
-
- public IBinder getBinder() {
- synchronized (mLock) {
- return mBinder;
- }
- }
-
- public void switchUser() {
- synchronized (mLock) {
- if (!mIsMultiuser) {
- unbindLocked();
- bindBestPackageLocked(mServicePackageName);
- }
- }
- }
-}
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