Ye Wen | d97e1fd | 2014-07-24 12:56:45 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2014 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 | |
| 19 | import com.android.internal.telephony.IMms; |
| 20 | |
| 21 | import android.Manifest; |
| 22 | import android.app.AppOpsManager; |
| 23 | import android.app.PendingIntent; |
| 24 | import android.content.ComponentName; |
| 25 | import android.content.ContentValues; |
| 26 | import android.content.Context; |
| 27 | import android.content.Intent; |
| 28 | import android.content.ServiceConnection; |
| 29 | import android.content.pm.PackageManager; |
| 30 | import android.net.Uri; |
| 31 | import android.os.Binder; |
| 32 | import android.os.Handler; |
| 33 | import android.os.IBinder; |
| 34 | import android.os.Message; |
| 35 | import android.os.RemoteException; |
| 36 | import android.telephony.TelephonyManager; |
| 37 | import android.util.Slog; |
| 38 | |
| 39 | /** |
| 40 | * This class is a proxy for MmsService APIs. We need this because MmsService runs |
| 41 | * in phone process and may crash anytime. This manages a connection to the actual |
| 42 | * MmsService and bridges the public SMS/MMS APIs with MmsService implementation. |
| 43 | */ |
| 44 | public class MmsServiceBroker extends SystemService { |
| 45 | private static final String TAG = "MmsServiceBroker"; |
| 46 | |
| 47 | private static final ComponentName MMS_SERVICE_COMPONENT = |
| 48 | new ComponentName("com.android.mms.service", "com.android.mms.service.MmsService"); |
| 49 | |
| 50 | private static final int MSG_TRY_CONNECTING = 1; |
| 51 | |
| 52 | private Context mContext; |
| 53 | // The actual MMS service instance to invoke |
| 54 | private volatile IMms mService; |
| 55 | private boolean mIsConnecting; |
| 56 | |
| 57 | // Cached system service instances |
| 58 | private volatile AppOpsManager mAppOpsManager = null; |
| 59 | private volatile PackageManager mPackageManager = null; |
| 60 | private volatile TelephonyManager mTelephonyManager = null; |
| 61 | |
| 62 | private final Handler mConnectionHandler = new Handler() { |
| 63 | @Override |
| 64 | public void handleMessage(Message msg) { |
| 65 | switch (msg.what) { |
| 66 | case MSG_TRY_CONNECTING: |
| 67 | tryConnecting(); |
| 68 | break; |
| 69 | default: |
| 70 | Slog.e(TAG, "Unknown message"); |
| 71 | } |
| 72 | } |
| 73 | }; |
| 74 | |
| 75 | private ServiceConnection mConnection = new ServiceConnection() { |
| 76 | @Override |
| 77 | public void onServiceConnected(ComponentName name, IBinder service) { |
| 78 | Slog.i(TAG, "MmsService connected"); |
| 79 | synchronized (MmsServiceBroker.this) { |
| 80 | mService = IMms.Stub.asInterface(service); |
| 81 | mIsConnecting = false; |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | @Override |
| 86 | public void onServiceDisconnected(ComponentName name) { |
| 87 | Slog.i(TAG, "MmsService unexpectedly disconnected"); |
| 88 | synchronized (MmsServiceBroker.this) { |
| 89 | mService = null; |
| 90 | mIsConnecting = false; |
| 91 | } |
| 92 | } |
| 93 | }; |
| 94 | |
| 95 | public MmsServiceBroker(Context context) { |
| 96 | super(context); |
| 97 | mContext = context; |
| 98 | mService = null; |
| 99 | mIsConnecting = false; |
| 100 | } |
| 101 | |
| 102 | @Override |
| 103 | public void onStart() { |
| 104 | publishBinderService("imms", new BinderService()); |
| 105 | } |
| 106 | |
| 107 | public void systemRunning() { |
| 108 | tryConnecting(); |
| 109 | } |
| 110 | |
| 111 | private void tryConnecting() { |
| 112 | Slog.i(TAG, "Connecting to MmsService"); |
| 113 | synchronized (this) { |
| 114 | if (mIsConnecting) { |
| 115 | Slog.d(TAG, "Already connecting"); |
| 116 | return; |
| 117 | } |
| 118 | final Intent intent = new Intent(); |
| 119 | intent.setComponent(MMS_SERVICE_COMPONENT); |
| 120 | try { |
| 121 | if (mContext.bindService(intent, mConnection, Context.BIND_AUTO_CREATE)) { |
| 122 | mIsConnecting = true; |
| 123 | } else { |
| 124 | Slog.e(TAG, "Failed to connect to MmsService"); |
| 125 | } |
| 126 | } catch (SecurityException e) { |
| 127 | Slog.e(TAG, "Forbidden to connect to MmsService", e); |
| 128 | } |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | private void ensureService() { |
| 133 | if (mService == null) { |
| 134 | // Service instance lost, kicking off the connection again |
| 135 | mConnectionHandler.sendMessage(mConnectionHandler.obtainMessage(MSG_TRY_CONNECTING)); |
| 136 | throw new RuntimeException("MMS service is not connected"); |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * Making sure when we obtain the mService instance it is always valid. |
| 142 | * Throws {@link RuntimeException} when it is empty. |
| 143 | */ |
| 144 | private IMms getServiceGuarded() { |
| 145 | ensureService(); |
| 146 | return mService; |
| 147 | } |
| 148 | |
| 149 | private AppOpsManager getAppOpsManager() { |
| 150 | if (mAppOpsManager == null) { |
| 151 | mAppOpsManager = (AppOpsManager) mContext.getSystemService(Context.APP_OPS_SERVICE); |
| 152 | } |
| 153 | return mAppOpsManager; |
| 154 | } |
| 155 | |
| 156 | private PackageManager getPackageManager() { |
| 157 | if (mPackageManager == null) { |
| 158 | mPackageManager = mContext.getPackageManager(); |
| 159 | } |
| 160 | return mPackageManager; |
| 161 | } |
| 162 | |
| 163 | private TelephonyManager getTelephonyManager() { |
| 164 | if (mTelephonyManager == null) { |
| 165 | mTelephonyManager = (TelephonyManager) mContext.getSystemService( |
| 166 | Context.TELEPHONY_SERVICE); |
| 167 | } |
| 168 | return mTelephonyManager; |
| 169 | } |
| 170 | |
| 171 | /* |
| 172 | * Throws a security exception unless the caller has carrier privilege. |
| 173 | */ |
| 174 | private void enforceCarrierPrivilege() { |
| 175 | String[] packages = getPackageManager().getPackagesForUid(Binder.getCallingUid()); |
| 176 | for (String pkg : packages) { |
| 177 | if (getTelephonyManager().checkCarrierPrivilegesForPackage(pkg) == |
| 178 | TelephonyManager.CARRIER_PRIVILEGE_STATUS_HAS_ACCESS) { |
| 179 | return; |
| 180 | } |
| 181 | } |
| 182 | throw new SecurityException("No carrier privilege"); |
| 183 | } |
| 184 | |
| 185 | // Service API calls implementation, proxied to the real MmsService in "com.android.mms.service" |
| 186 | private final class BinderService extends IMms.Stub { |
| 187 | @Override |
| 188 | public void sendMessage(long subId, String callingPkg, byte[] pdu, String locationUrl, |
| 189 | PendingIntent sentIntent) throws RemoteException { |
| 190 | mContext.enforceCallingPermission(Manifest.permission.SEND_SMS, "Send MMS message"); |
| 191 | if (getAppOpsManager().noteOp(AppOpsManager.OP_SEND_SMS, Binder.getCallingUid(), |
| 192 | callingPkg) != AppOpsManager.MODE_ALLOWED) { |
| 193 | return; |
| 194 | } |
| 195 | getServiceGuarded().sendMessage(subId, callingPkg, pdu, locationUrl, sentIntent); |
| 196 | } |
| 197 | |
| 198 | @Override |
| 199 | public void downloadMessage(long subId, String callingPkg, String locationUrl, |
| 200 | PendingIntent downloadedIntent) throws RemoteException { |
| 201 | mContext.enforceCallingPermission(Manifest.permission.RECEIVE_MMS, |
| 202 | "Download MMS message"); |
| 203 | if (getAppOpsManager().noteOp(AppOpsManager.OP_RECEIVE_MMS, Binder.getCallingUid(), |
| 204 | callingPkg) != AppOpsManager.MODE_ALLOWED) { |
| 205 | return; |
| 206 | } |
| 207 | getServiceGuarded().downloadMessage(subId, callingPkg, locationUrl, downloadedIntent); |
| 208 | } |
| 209 | |
| 210 | @Override |
| 211 | public void updateMmsSendStatus(int messageRef, boolean success) throws RemoteException { |
| 212 | enforceCarrierPrivilege(); |
| 213 | getServiceGuarded().updateMmsSendStatus(messageRef, success); |
| 214 | } |
| 215 | |
| 216 | @Override |
| 217 | public void updateMmsDownloadStatus(int messageRef, byte[] pdu) throws RemoteException { |
| 218 | enforceCarrierPrivilege(); |
| 219 | getServiceGuarded().updateMmsDownloadStatus(messageRef, pdu); |
| 220 | } |
| 221 | |
| 222 | @Override |
| 223 | public boolean getCarrierConfigBoolean(String name, boolean defaultValue) |
| 224 | throws RemoteException { |
| 225 | return getServiceGuarded().getCarrierConfigBoolean(name, defaultValue); |
| 226 | } |
| 227 | |
| 228 | @Override |
| 229 | public int getCarrierConfigInt(String name, int defaultValue) throws RemoteException { |
| 230 | return getServiceGuarded().getCarrierConfigInt(name, defaultValue); |
| 231 | } |
| 232 | |
| 233 | @Override |
| 234 | public String getCarrierConfigString(String name, String defaultValue) |
| 235 | throws RemoteException { |
| 236 | return getServiceGuarded().getCarrierConfigString(name, defaultValue); |
| 237 | } |
| 238 | |
| 239 | @Override |
| 240 | public void setCarrierConfigBoolean(String callingPkg, String name, boolean value) |
| 241 | throws RemoteException { |
| 242 | mContext.enforceCallingPermission(Manifest.permission.SEND_SMS, "Set MMS config"); |
| 243 | if (getAppOpsManager().noteOp(AppOpsManager.OP_SEND_SMS, Binder.getCallingUid(), |
| 244 | callingPkg) != AppOpsManager.MODE_ALLOWED) { |
| 245 | return; |
| 246 | } |
| 247 | getServiceGuarded().setCarrierConfigBoolean(callingPkg, name, value); |
| 248 | } |
| 249 | |
| 250 | @Override |
| 251 | public void setCarrierConfigInt(String callingPkg, String name, int value) |
| 252 | throws RemoteException { |
| 253 | mContext.enforceCallingPermission(Manifest.permission.SEND_SMS, "Set MMS config"); |
| 254 | if (getAppOpsManager().noteOp(AppOpsManager.OP_SEND_SMS, Binder.getCallingUid(), |
| 255 | callingPkg) != AppOpsManager.MODE_ALLOWED) { |
| 256 | return; |
| 257 | } |
| 258 | getServiceGuarded().setCarrierConfigInt(callingPkg, name, value); |
| 259 | } |
| 260 | |
| 261 | @Override |
| 262 | public void setCarrierConfigString(String callingPkg, String name, String value) |
| 263 | throws RemoteException { |
| 264 | mContext.enforceCallingPermission(Manifest.permission.SEND_SMS, "Set MMS config"); |
| 265 | if (getAppOpsManager().noteOp(AppOpsManager.OP_SEND_SMS, Binder.getCallingUid(), |
| 266 | callingPkg) != AppOpsManager.MODE_ALLOWED) { |
| 267 | return; |
| 268 | } |
| 269 | getServiceGuarded().setCarrierConfigString(callingPkg, name, value); |
| 270 | } |
| 271 | |
| 272 | @Override |
| 273 | public Uri importTextMessage(String callingPkg, String address, int type, String text, |
| 274 | long timestampMillis, boolean seen, boolean read) throws RemoteException { |
| 275 | mContext.enforceCallingPermission(Manifest.permission.WRITE_SMS, "Import SMS message"); |
| 276 | if (getAppOpsManager().noteOp(AppOpsManager.OP_WRITE_SMS, Binder.getCallingUid(), |
| 277 | callingPkg) != AppOpsManager.MODE_ALLOWED) { |
| 278 | return null; |
| 279 | } |
| 280 | return getServiceGuarded().importTextMessage( |
| 281 | callingPkg, address, type, text, timestampMillis, seen, read); |
| 282 | } |
| 283 | |
| 284 | @Override |
| 285 | public Uri importMultimediaMessage(String callingPkg, byte[] pdu, String messageId, |
| 286 | long timestampSecs, boolean seen, boolean read) throws RemoteException { |
| 287 | mContext.enforceCallingPermission(Manifest.permission.WRITE_SMS, "Import MMS message"); |
| 288 | if (getAppOpsManager().noteOp(AppOpsManager.OP_WRITE_SMS, Binder.getCallingUid(), |
| 289 | callingPkg) != AppOpsManager.MODE_ALLOWED) { |
| 290 | return null; |
| 291 | } |
| 292 | return getServiceGuarded().importMultimediaMessage( |
| 293 | callingPkg, pdu, messageId, timestampSecs, seen, read); |
| 294 | } |
| 295 | |
| 296 | @Override |
| 297 | public boolean deleteStoredMessage(String callingPkg, Uri messageUri) |
| 298 | throws RemoteException { |
| 299 | mContext.enforceCallingPermission(Manifest.permission.WRITE_SMS, |
| 300 | "Delete SMS/MMS message"); |
| 301 | if (getAppOpsManager().noteOp(AppOpsManager.OP_WRITE_SMS, Binder.getCallingUid(), |
| 302 | callingPkg) != AppOpsManager.MODE_ALLOWED) { |
| 303 | return false; |
| 304 | } |
| 305 | return getServiceGuarded().deleteStoredMessage(callingPkg, messageUri); |
| 306 | } |
| 307 | |
| 308 | @Override |
| 309 | public boolean deleteStoredConversation(String callingPkg, long conversationId) |
| 310 | throws RemoteException { |
| 311 | mContext.enforceCallingPermission(Manifest.permission.WRITE_SMS, "Delete conversation"); |
| 312 | if (getAppOpsManager().noteOp(AppOpsManager.OP_WRITE_SMS, Binder.getCallingUid(), |
| 313 | callingPkg) != AppOpsManager.MODE_ALLOWED) { |
| 314 | return false; |
| 315 | } |
| 316 | return getServiceGuarded().deleteStoredConversation(callingPkg, conversationId); |
| 317 | } |
| 318 | |
| 319 | @Override |
| 320 | public boolean updateStoredMessageStatus(String callingPkg, Uri messageUri, |
| 321 | ContentValues statusValues) throws RemoteException { |
| 322 | mContext.enforceCallingPermission(Manifest.permission.WRITE_SMS, |
| 323 | "Update SMS/MMS message"); |
| 324 | return getServiceGuarded() |
| 325 | .updateStoredMessageStatus(callingPkg, messageUri, statusValues); |
| 326 | } |
| 327 | |
| 328 | @Override |
| 329 | public Uri addTextMessageDraft(String callingPkg, String address, String text) |
| 330 | throws RemoteException { |
| 331 | mContext.enforceCallingPermission(Manifest.permission.WRITE_SMS, "Add SMS draft"); |
| 332 | if (getAppOpsManager().noteOp(AppOpsManager.OP_WRITE_SMS, Binder.getCallingUid(), |
| 333 | callingPkg) != AppOpsManager.MODE_ALLOWED) { |
| 334 | return null; |
| 335 | } |
| 336 | return getServiceGuarded().addTextMessageDraft(callingPkg, address, text); |
| 337 | } |
| 338 | |
| 339 | @Override |
| 340 | public Uri addMultimediaMessageDraft(String callingPkg, byte[] pdu) throws RemoteException { |
| 341 | mContext.enforceCallingPermission(Manifest.permission.WRITE_SMS, "Add MMS draft"); |
| 342 | if (getAppOpsManager().noteOp(AppOpsManager.OP_WRITE_SMS, Binder.getCallingUid(), |
| 343 | callingPkg) != AppOpsManager.MODE_ALLOWED) { |
| 344 | return null; |
| 345 | } |
| 346 | return getServiceGuarded().addMultimediaMessageDraft(callingPkg, pdu); |
| 347 | } |
| 348 | |
| 349 | @Override |
| 350 | public void sendStoredMessage(long subId, String callingPkg, Uri messageUri, |
| 351 | PendingIntent sentIntent) throws RemoteException { |
| 352 | mContext.enforceCallingPermission(Manifest.permission.SEND_SMS, |
| 353 | "Send stored MMS message"); |
| 354 | if (getAppOpsManager().noteOp(AppOpsManager.OP_SEND_SMS, Binder.getCallingUid(), |
| 355 | callingPkg) != AppOpsManager.MODE_ALLOWED) { |
| 356 | return; |
| 357 | } |
| 358 | getServiceGuarded().sendStoredMessage(subId, callingPkg, messageUri, sentIntent); |
| 359 | } |
| 360 | |
| 361 | @Override |
| 362 | public void setAutoPersisting(String callingPkg, boolean enabled) throws RemoteException { |
| 363 | mContext.enforceCallingPermission(Manifest.permission.WRITE_SMS, "Set auto persist"); |
| 364 | if (getAppOpsManager().noteOp(AppOpsManager.OP_WRITE_SMS, Binder.getCallingUid(), |
| 365 | callingPkg) != AppOpsManager.MODE_ALLOWED) { |
| 366 | return; |
| 367 | } |
| 368 | getServiceGuarded().setAutoPersisting(callingPkg, enabled); |
| 369 | } |
| 370 | |
| 371 | @Override |
| 372 | public boolean getAutoPersisting() throws RemoteException { |
| 373 | return getServiceGuarded().getAutoPersisting(); |
| 374 | } |
| 375 | } |
| 376 | } |