Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.server; |
| 18 | |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 19 | import android.content.BroadcastReceiver; |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 20 | import android.content.ComponentName; |
| 21 | import android.content.Context; |
| 22 | import android.content.Intent; |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 23 | import android.content.IntentFilter; |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 24 | import android.content.ServiceConnection; |
| 25 | import android.content.pm.PackageInfo; |
| 26 | import android.content.pm.PackageManager; |
| 27 | import android.content.pm.PackageManager.NameNotFoundException; |
| 28 | import android.content.pm.ResolveInfo; |
| 29 | import android.content.pm.Signature; |
| 30 | import android.os.Handler; |
| 31 | import android.os.IBinder; |
Victoria Lease | b711d57 | 2012-10-02 13:14:11 -0700 | [diff] [blame] | 32 | import android.os.UserHandle; |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 33 | import android.util.Log; |
| 34 | |
| 35 | import com.android.internal.content.PackageMonitor; |
| 36 | |
| 37 | import java.util.ArrayList; |
| 38 | import java.util.Arrays; |
| 39 | import java.util.HashSet; |
| 40 | import java.util.List; |
| 41 | |
| 42 | /** |
| 43 | * Find the best Service, and bind to it. |
| 44 | * Handles run-time package changes. |
| 45 | */ |
| 46 | public class ServiceWatcher implements ServiceConnection { |
| 47 | private static final boolean D = false; |
Jeff Hamilton | fbadb69 | 2012-10-05 14:21:58 -0500 | [diff] [blame] | 48 | public static final String EXTRA_SERVICE_VERSION = "serviceVersion"; |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 49 | public static final String EXTRA_SERVICE_IS_MULTIUSER = "serviceIsMultiuser"; |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 50 | |
| 51 | private final String mTag; |
| 52 | private final Context mContext; |
| 53 | private final PackageManager mPm; |
| 54 | private final List<HashSet<Signature>> mSignatureSets; |
| 55 | private final String mAction; |
| 56 | private final Runnable mNewServiceWork; |
| 57 | private final Handler mHandler; |
| 58 | |
| 59 | private Object mLock = new Object(); |
| 60 | |
| 61 | // all fields below synchronized on mLock |
| 62 | private IBinder mBinder; // connected service |
| 63 | private String mPackageName; // current best package |
Jeff Hamilton | fbadb69 | 2012-10-05 14:21:58 -0500 | [diff] [blame] | 64 | private int mVersion = Integer.MIN_VALUE; // current best version |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 65 | /** |
| 66 | * Whether the currently-connected service is multiuser-aware. This can change at run-time |
| 67 | * when switching from one version of a service to another. |
| 68 | */ |
| 69 | private boolean mIsMultiuser = false; |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 70 | |
Jeff Hamilton | fbadb69 | 2012-10-05 14:21:58 -0500 | [diff] [blame] | 71 | public static ArrayList<HashSet<Signature>> getSignatureSets(Context context, |
| 72 | List<String> initialPackageNames) { |
| 73 | PackageManager pm = context.getPackageManager(); |
| 74 | ArrayList<HashSet<Signature>> sigSets = new ArrayList<HashSet<Signature>>(); |
| 75 | for (int i = 0, size = initialPackageNames.size(); i < size; i++) { |
| 76 | String pkg = initialPackageNames.get(i); |
| 77 | try { |
| 78 | HashSet<Signature> set = new HashSet<Signature>(); |
| 79 | Signature[] sigs = pm.getPackageInfo(pkg, PackageManager.GET_SIGNATURES).signatures; |
| 80 | set.addAll(Arrays.asList(sigs)); |
| 81 | sigSets.add(set); |
| 82 | } catch (NameNotFoundException e) { |
| 83 | Log.w("ServiceWatcher", pkg + " not found"); |
| 84 | } |
| 85 | } |
| 86 | return sigSets; |
| 87 | } |
| 88 | |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 89 | public ServiceWatcher(Context context, String logTag, String action, |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 90 | List<String> initialPackageNames, Runnable newServiceWork, Handler handler) { |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 91 | mContext = context; |
| 92 | mTag = logTag; |
| 93 | mAction = action; |
| 94 | mPm = mContext.getPackageManager(); |
| 95 | mNewServiceWork = newServiceWork; |
| 96 | mHandler = handler; |
Jeff Hamilton | fbadb69 | 2012-10-05 14:21:58 -0500 | [diff] [blame] | 97 | mSignatureSets = getSignatureSets(context, initialPackageNames); |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 98 | } |
| 99 | |
| 100 | public boolean start() { |
Victoria Lease | b711d57 | 2012-10-02 13:14:11 -0700 | [diff] [blame] | 101 | synchronized (mLock) { |
| 102 | if (!bindBestPackageLocked(null)) return false; |
| 103 | } |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 104 | |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 105 | // listen for user change |
| 106 | IntentFilter intentFilter = new IntentFilter(); |
| 107 | intentFilter.addAction(Intent.ACTION_USER_SWITCHED); |
| 108 | mContext.registerReceiverAsUser(new BroadcastReceiver() { |
| 109 | @Override |
| 110 | public void onReceive(Context context, Intent intent) { |
| 111 | String action = intent.getAction(); |
| 112 | if (Intent.ACTION_USER_SWITCHED.equals(action)) { |
| 113 | switchUser(); |
| 114 | } |
| 115 | } |
| 116 | }, UserHandle.ALL, intentFilter, null, mHandler); |
| 117 | |
| 118 | // listen for relevant package changes |
Victoria Lease | b711d57 | 2012-10-02 13:14:11 -0700 | [diff] [blame] | 119 | mPackageMonitor.register(mContext, null, UserHandle.ALL, true); |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 120 | |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 121 | return true; |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * Searches and binds to the best package, or do nothing |
| 126 | * if the best package is already bound. |
| 127 | * Only checks the named package, or checks all packages if it |
| 128 | * is null. |
| 129 | * Return true if a new package was found to bind to. |
| 130 | */ |
Victoria Lease | b711d57 | 2012-10-02 13:14:11 -0700 | [diff] [blame] | 131 | private boolean bindBestPackageLocked(String justCheckThisPackage) { |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 132 | Intent intent = new Intent(mAction); |
| 133 | if (justCheckThisPackage != null) { |
| 134 | intent.setPackage(justCheckThisPackage); |
| 135 | } |
Victoria Lease | b711d57 | 2012-10-02 13:14:11 -0700 | [diff] [blame] | 136 | List<ResolveInfo> rInfos = mPm.queryIntentServicesAsUser(new Intent(mAction), |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 137 | PackageManager.GET_META_DATA, UserHandle.USER_OWNER); |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 138 | int bestVersion = Integer.MIN_VALUE; |
| 139 | String bestPackage = null; |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 140 | boolean bestIsMultiuser = false; |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 141 | for (ResolveInfo rInfo : rInfos) { |
| 142 | String packageName = rInfo.serviceInfo.packageName; |
| 143 | |
| 144 | // check signature |
| 145 | try { |
| 146 | PackageInfo pInfo; |
| 147 | pInfo = mPm.getPackageInfo(packageName, PackageManager.GET_SIGNATURES); |
| 148 | if (!isSignatureMatch(pInfo.signatures)) { |
| 149 | Log.w(mTag, packageName + " resolves service " + mAction + |
| 150 | ", but has wrong signature, ignoring"); |
| 151 | continue; |
| 152 | } |
| 153 | } catch (NameNotFoundException e) { |
| 154 | Log.wtf(mTag, e); |
| 155 | continue; |
| 156 | } |
| 157 | |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 158 | // check metadata |
| 159 | int version = Integer.MIN_VALUE; |
| 160 | boolean isMultiuser = false; |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 161 | if (rInfo.serviceInfo.metaData != null) { |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 162 | version = rInfo.serviceInfo.metaData.getInt(EXTRA_SERVICE_VERSION, |
| 163 | Integer.MIN_VALUE); |
| 164 | isMultiuser = rInfo.serviceInfo.metaData.getBoolean(EXTRA_SERVICE_IS_MULTIUSER); |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 165 | } |
Jeff Hamilton | fbadb69 | 2012-10-05 14:21:58 -0500 | [diff] [blame] | 166 | |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 167 | if (version > mVersion) { |
| 168 | bestVersion = version; |
| 169 | bestPackage = packageName; |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 170 | bestIsMultiuser = isMultiuser; |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 171 | } |
| 172 | } |
| 173 | |
Jeff Hamilton | fbadb69 | 2012-10-05 14:21:58 -0500 | [diff] [blame] | 174 | if (D) Log.d(mTag, String.format("bindBestPackage for %s : %s found %d, %s", mAction, |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 175 | (justCheckThisPackage == null ? "" : "(" + justCheckThisPackage + ") "), |
| 176 | rInfos.size(), |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 177 | (bestPackage == null ? "no new best package" : "new best package: " |
| 178 | + bestPackage))); |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 179 | |
| 180 | if (bestPackage != null) { |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 181 | bindToPackageLocked(bestPackage, bestVersion, bestIsMultiuser); |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 182 | return true; |
| 183 | } |
| 184 | return false; |
| 185 | } |
| 186 | |
Victoria Lease | b711d57 | 2012-10-02 13:14:11 -0700 | [diff] [blame] | 187 | private void unbindLocked() { |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 188 | String pkg; |
Victoria Lease | b711d57 | 2012-10-02 13:14:11 -0700 | [diff] [blame] | 189 | pkg = mPackageName; |
| 190 | mPackageName = null; |
| 191 | mVersion = Integer.MIN_VALUE; |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 192 | mIsMultiuser = false; |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 193 | if (pkg != null) { |
| 194 | if (D) Log.d(mTag, "unbinding " + pkg); |
| 195 | mContext.unbindService(this); |
| 196 | } |
| 197 | } |
| 198 | |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 199 | private void bindToPackageLocked(String packageName, int version, boolean isMultiuser) { |
Victoria Lease | b711d57 | 2012-10-02 13:14:11 -0700 | [diff] [blame] | 200 | unbindLocked(); |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 201 | Intent intent = new Intent(mAction); |
| 202 | intent.setPackage(packageName); |
Victoria Lease | b711d57 | 2012-10-02 13:14:11 -0700 | [diff] [blame] | 203 | mPackageName = packageName; |
| 204 | mVersion = version; |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 205 | mIsMultiuser = isMultiuser; |
| 206 | if (D) Log.d(mTag, "binding " + packageName + " (version " + version + ") (" |
| 207 | + (isMultiuser ? "multi" : "single") + "-user)"); |
Amith Yamasani | 27b89e6 | 2013-01-16 12:30:11 -0800 | [diff] [blame] | 208 | mContext.bindServiceAsUser(intent, this, Context.BIND_AUTO_CREATE | Context.BIND_NOT_FOREGROUND |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 209 | | Context.BIND_NOT_VISIBLE, mIsMultiuser ? UserHandle.OWNER : UserHandle.CURRENT); |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 210 | } |
| 211 | |
Jeff Hamilton | fbadb69 | 2012-10-05 14:21:58 -0500 | [diff] [blame] | 212 | public static boolean isSignatureMatch(Signature[] signatures, |
| 213 | List<HashSet<Signature>> sigSets) { |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 214 | if (signatures == null) return false; |
| 215 | |
| 216 | // build hashset of input to test against |
| 217 | HashSet<Signature> inputSet = new HashSet<Signature>(); |
| 218 | for (Signature s : signatures) { |
| 219 | inputSet.add(s); |
| 220 | } |
| 221 | |
| 222 | // test input against each of the signature sets |
Jeff Hamilton | fbadb69 | 2012-10-05 14:21:58 -0500 | [diff] [blame] | 223 | for (HashSet<Signature> referenceSet : sigSets) { |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 224 | if (referenceSet.equals(inputSet)) { |
| 225 | return true; |
| 226 | } |
| 227 | } |
| 228 | return false; |
| 229 | } |
| 230 | |
Jeff Hamilton | fbadb69 | 2012-10-05 14:21:58 -0500 | [diff] [blame] | 231 | private boolean isSignatureMatch(Signature[] signatures) { |
| 232 | return isSignatureMatch(signatures, mSignatureSets); |
| 233 | } |
| 234 | |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 235 | private final PackageMonitor mPackageMonitor = new PackageMonitor() { |
| 236 | /** |
| 237 | * Called when package has been reinstalled |
| 238 | */ |
| 239 | @Override |
| 240 | public void onPackageUpdateFinished(String packageName, int uid) { |
Victoria Lease | b711d57 | 2012-10-02 13:14:11 -0700 | [diff] [blame] | 241 | synchronized (mLock) { |
| 242 | if (packageName.equals(mPackageName)) { |
| 243 | // package updated, make sure to rebind |
| 244 | unbindLocked(); |
| 245 | } |
| 246 | // check the updated package in case it is better |
| 247 | bindBestPackageLocked(packageName); |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 248 | } |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 249 | } |
| 250 | |
| 251 | @Override |
| 252 | public void onPackageAdded(String packageName, int uid) { |
Victoria Lease | b711d57 | 2012-10-02 13:14:11 -0700 | [diff] [blame] | 253 | synchronized (mLock) { |
| 254 | if (packageName.equals(mPackageName)) { |
| 255 | // package updated, make sure to rebind |
| 256 | unbindLocked(); |
| 257 | } |
| 258 | // check the new package is case it is better |
| 259 | bindBestPackageLocked(packageName); |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 260 | } |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 261 | } |
| 262 | |
| 263 | @Override |
| 264 | public void onPackageRemoved(String packageName, int uid) { |
Victoria Lease | b711d57 | 2012-10-02 13:14:11 -0700 | [diff] [blame] | 265 | synchronized (mLock) { |
| 266 | if (packageName.equals(mPackageName)) { |
| 267 | unbindLocked(); |
| 268 | // the currently bound package was removed, |
| 269 | // need to search for a new package |
| 270 | bindBestPackageLocked(null); |
| 271 | } |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 272 | } |
| 273 | } |
| 274 | }; |
| 275 | |
| 276 | @Override |
| 277 | public void onServiceConnected(ComponentName name, IBinder binder) { |
| 278 | synchronized (mLock) { |
| 279 | String packageName = name.getPackageName(); |
| 280 | if (packageName.equals(mPackageName)) { |
| 281 | if (D) Log.d(mTag, packageName + " connected"); |
| 282 | mBinder = binder; |
| 283 | if (mHandler !=null && mNewServiceWork != null) { |
| 284 | mHandler.post(mNewServiceWork); |
| 285 | } |
| 286 | } else { |
| 287 | Log.w(mTag, "unexpected onServiceConnected: " + packageName); |
| 288 | } |
| 289 | } |
| 290 | } |
| 291 | |
| 292 | @Override |
| 293 | public void onServiceDisconnected(ComponentName name) { |
| 294 | synchronized (mLock) { |
| 295 | String packageName = name.getPackageName(); |
| 296 | if (D) Log.d(mTag, packageName + " disconnected"); |
| 297 | |
| 298 | if (packageName.equals(mPackageName)) { |
| 299 | mBinder = null; |
| 300 | } |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | public String getBestPackageName() { |
| 305 | synchronized (mLock) { |
| 306 | return mPackageName; |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | public int getBestVersion() { |
| 311 | synchronized (mLock) { |
| 312 | return mVersion; |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | public IBinder getBinder() { |
| 317 | synchronized (mLock) { |
| 318 | return mBinder; |
| 319 | } |
| 320 | } |
Victoria Lease | b711d57 | 2012-10-02 13:14:11 -0700 | [diff] [blame] | 321 | |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 322 | public void switchUser() { |
Victoria Lease | b711d57 | 2012-10-02 13:14:11 -0700 | [diff] [blame] | 323 | synchronized (mLock) { |
Victoria Lease | 03cdd3d | 2013-02-01 15:15:54 -0800 | [diff] [blame^] | 324 | if (!mIsMultiuser) { |
| 325 | unbindLocked(); |
| 326 | bindBestPackageLocked(null); |
| 327 | } |
Victoria Lease | b711d57 | 2012-10-02 13:14:11 -0700 | [diff] [blame] | 328 | } |
| 329 | } |
Nick Pelly | 6fa9ad4 | 2012-07-16 12:18:23 -0700 | [diff] [blame] | 330 | } |