1 /* 2 * Copyright (C) 2008 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 android.net; 18 19 import android.content.BroadcastReceiver; 20 import android.content.Context; 21 import android.content.Intent; 22 import android.content.IntentFilter; 23 import android.os.RemoteException; 24 import android.os.Handler; 25 import android.os.ServiceManager; 26 import android.os.SystemProperties; 27 import com.android.internal.telephony.ITelephony; 28 import com.android.internal.telephony.Phone; 29 import com.android.internal.telephony.TelephonyIntents; 30 import android.net.NetworkInfo.DetailedState; 31 import android.telephony.TelephonyManager; 32 import android.util.Log; 33 import android.text.TextUtils; 34 35 /** 36 * Track the state of mobile data connectivity. This is done by 37 * receiving broadcast intents from the Phone process whenever 38 * the state of data connectivity changes. 39 * 40 * {@hide} 41 */ 42 public class MobileDataStateTracker extends NetworkStateTracker { 43 44 private static final String TAG = "MobileDataStateTracker"; 45 private static final boolean DBG = false; 46 47 private Phone.DataState mMobileDataState; 48 private ITelephony mPhoneService; 49 50 private String mApnType; 51 private String mApnTypeToWatchFor; 52 private String mApnName; 53 private boolean mEnabled; 54 private BroadcastReceiver mStateReceiver; 55 56 // DEFAULT and HIPRI are the same connection. If we're one of these we need to check if 57 // the other is also disconnected before we reset sockets 58 private boolean mIsDefaultOrHipri = false; 59 60 /** 61 * Create a new MobileDataStateTracker 62 * @param context the application context of the caller 63 * @param target a message handler for getting callbacks about state changes 64 * @param netType the ConnectivityManager network type 65 * @param apnType the Phone apnType 66 * @param tag the name of this network 67 */ 68 public MobileDataStateTracker(Context context, Handler target, int netType, String tag) { 69 super(context, target, netType, 70 TelephonyManager.getDefault().getNetworkType(), tag, 71 TelephonyManager.getDefault().getNetworkTypeName()); 72 mApnType = networkTypeToApnType(netType); 73 if (TextUtils.equals(mApnType, Phone.APN_TYPE_HIPRI)) { 74 mApnTypeToWatchFor = Phone.APN_TYPE_DEFAULT; 75 } else { 76 mApnTypeToWatchFor = mApnType; 77 } 78 if (netType == ConnectivityManager.TYPE_MOBILE || 79 netType == ConnectivityManager.TYPE_MOBILE_HIPRI) { 80 mIsDefaultOrHipri = true; 81 } 82 83 mPhoneService = null; 84 if(netType == ConnectivityManager.TYPE_MOBILE) { 85 mEnabled = true; 86 } else { 87 mEnabled = false; 88 } 89 90 mDnsPropNames = new String[] { 91 "net.rmnet0.dns1", 92 "net.rmnet0.dns2", 93 "net.eth0.dns1", 94 "net.eth0.dns2", 95 "net.eth0.dns3", 96 "net.eth0.dns4", 97 "net.gprs.dns1", 98 "net.gprs.dns2", 99 "net.ppp0.dns1", 100 "net.ppp0.dns2"}; 101 102 } 103 104 /** 105 * Begin monitoring mobile data connectivity. 106 */ 107 public void startMonitoring() { 108 IntentFilter filter = 109 new IntentFilter(TelephonyIntents.ACTION_ANY_DATA_CONNECTION_STATE_CHANGED); 110 filter.addAction(TelephonyIntents.ACTION_DATA_CONNECTION_FAILED); 111 filter.addAction(TelephonyIntents.ACTION_SERVICE_STATE_CHANGED); 112 113 mStateReceiver = new MobileDataStateReceiver(); 114 Intent intent = mContext.registerReceiver(mStateReceiver, filter); 115 if (intent != null) 116 mMobileDataState = getMobileDataState(intent); 117 else 118 mMobileDataState = Phone.DataState.DISCONNECTED; 119 } 120 121 private Phone.DataState getMobileDataState(Intent intent) { 122 String str = intent.getStringExtra(Phone.STATE_KEY); 123 if (str != null) { 124 String apnTypeList = 125 intent.getStringExtra(Phone.DATA_APN_TYPES_KEY); 126 if (isApnTypeIncluded(apnTypeList)) { 127 return Enum.valueOf(Phone.DataState.class, str); 128 } 129 } 130 return Phone.DataState.DISCONNECTED; 131 } 132 133 private boolean isApnTypeIncluded(String typeList) { 134 /* comma seperated list - split and check */ 135 if (typeList == null) 136 return false; 137 138 String[] list = typeList.split(","); 139 for(int i=0; i< list.length; i++) { 140 if (TextUtils.equals(list[i], mApnTypeToWatchFor) || 141 TextUtils.equals(list[i], Phone.APN_TYPE_ALL)) { 142 return true; 143 } 144 } 145 return false; 146 } 147 148 private class MobileDataStateReceiver extends BroadcastReceiver { 149 ConnectivityManager mConnectivityManager; 150 public void onReceive(Context context, Intent intent) { 151 synchronized(this) { 152 if (intent.getAction().equals(TelephonyIntents. 153 ACTION_ANY_DATA_CONNECTION_STATE_CHANGED)) { 154 Phone.DataState state = getMobileDataState(intent); 155 String reason = intent.getStringExtra(Phone.STATE_CHANGE_REASON_KEY); 156 String apnName = intent.getStringExtra(Phone.DATA_APN_KEY); 157 String apnTypeList = intent.getStringExtra(Phone.DATA_APN_TYPES_KEY); 158 mApnName = apnName; 159 160 boolean unavailable = intent.getBooleanExtra(Phone.NETWORK_UNAVAILABLE_KEY, 161 false); 162 163 // set this regardless of the apnTypeList. It's all the same radio/network 164 // underneath 165 mNetworkInfo.setIsAvailable(!unavailable); 166 167 if (isApnTypeIncluded(apnTypeList)) { 168 if (mEnabled == false) { 169 // if we're not enabled but the APN Type is supported by this connection 170 // we should record the interface name if one's provided. If the user 171 // turns on this network we will need the interfacename but won't get 172 // a fresh connected message - TODO fix this when we get per-APN 173 // notifications 174 if (state == Phone.DataState.CONNECTED) { 175 if (DBG) Log.d(TAG, "replacing old mInterfaceName (" + 176 mInterfaceName + ") with " + 177 intent.getStringExtra(Phone.DATA_IFACE_NAME_KEY) + 178 " for " + mApnType); 179 mInterfaceName = intent.getStringExtra(Phone.DATA_IFACE_NAME_KEY); 180 } 181 return; 182 } 183 } else { 184 return; 185 } 186 187 if (DBG) Log.d(TAG, mApnType + " Received state= " + state + ", old= " + 188 mMobileDataState + ", reason= " + 189 (reason == null ? "(unspecified)" : reason) + 190 ", apnTypeList= " + apnTypeList); 191 192 if (mMobileDataState != state) { 193 mMobileDataState = state; 194 switch (state) { 195 case DISCONNECTED: 196 if(isTeardownRequested()) { 197 mEnabled = false; 198 setTeardownRequested(false); 199 } 200 201 setDetailedState(DetailedState.DISCONNECTED, reason, apnName); 202 boolean doReset = true; 203 if (mIsDefaultOrHipri == true) { 204 // both default and hipri must go down before we reset 205 int typeToCheck = (Phone.APN_TYPE_DEFAULT.equals(mApnType) ? 206 ConnectivityManager.TYPE_MOBILE_HIPRI : 207 ConnectivityManager.TYPE_MOBILE); 208 if (mConnectivityManager == null) { 209 mConnectivityManager = 210 (ConnectivityManager)context.getSystemService( 211 Context.CONNECTIVITY_SERVICE); 212 } 213 if (mConnectivityManager != null) { 214 NetworkInfo info = mConnectivityManager.getNetworkInfo( 215 typeToCheck); 216 if (info != null && info.isConnected() == true) { 217 doReset = false; 218 } 219 } 220 } 221 if (doReset && mInterfaceName != null) { 222 NetworkUtils.resetConnections(mInterfaceName); 223 } 224 // can't do this here - ConnectivityService needs it to clear stuff 225 // it's ok though - just leave it to be refreshed next time 226 // we connect. 227 //if (DBG) Log.d(TAG, "clearing mInterfaceName for "+ mApnType + 228 // " as it DISCONNECTED"); 229 //mInterfaceName = null; 230 //mDefaultGatewayAddr = 0; 231 break; 232 case CONNECTING: 233 setDetailedState(DetailedState.CONNECTING, reason, apnName); 234 break; 235 case SUSPENDED: 236 setDetailedState(DetailedState.SUSPENDED, reason, apnName); 237 break; 238 case CONNECTED: 239 mInterfaceName = intent.getStringExtra(Phone.DATA_IFACE_NAME_KEY); 240 if (mInterfaceName == null) { 241 Log.d(TAG, "CONNECTED event did not supply interface name."); 242 } 243 mDefaultGatewayAddr = intent.getIntExtra(Phone.DATA_GATEWAY_KEY, 0); 244 setDetailedState(DetailedState.CONNECTED, reason, apnName); 245 break; 246 } 247 } 248 } else if (intent.getAction(). 249 equals(TelephonyIntents.ACTION_DATA_CONNECTION_FAILED)) { 250 mEnabled = false; 251 String reason = intent.getStringExtra(Phone.FAILURE_REASON_KEY); 252 String apnName = intent.getStringExtra(Phone.DATA_APN_KEY); 253 if (DBG) Log.d(TAG, "Received " + intent.getAction() + " broadcast" + 254 reason == null ? "" : "(" + reason + ")"); 255 setDetailedState(DetailedState.FAILED, reason, apnName); 256 } 257 TelephonyManager tm = TelephonyManager.getDefault(); 258 setRoamingStatus(tm.isNetworkRoaming()); 259 setSubtype(tm.getNetworkType(), tm.getNetworkTypeName()); 260 } 261 } 262 } 263 264 private void getPhoneService(boolean forceRefresh) { 265 if ((mPhoneService == null) || forceRefresh) { 266 mPhoneService = ITelephony.Stub.asInterface(ServiceManager.getService("phone")); 267 } 268 } 269 270 /** 271 * Report whether data connectivity is possible. 272 */ 273 public boolean isAvailable() { 274 getPhoneService(false); 275 276 /* 277 * If the phone process has crashed in the past, we'll get a 278 * RemoteException and need to re-reference the service. 279 */ 280 for (int retry = 0; retry < 2; retry++) { 281 if (mPhoneService == null) break; 282 283 try { 284 return mPhoneService.isDataConnectivityPossible(); 285 } catch (RemoteException e) { 286 // First-time failed, get the phone service again 287 if (retry == 0) getPhoneService(true); 288 } 289 } 290 291 return false; 292 } 293 294 /** 295 * {@inheritDoc} 296 * The mobile data network subtype indicates what generation network technology is in effect, 297 * e.g., GPRS, EDGE, UMTS, etc. 298 */ 299 public int getNetworkSubtype() { 300 return TelephonyManager.getDefault().getNetworkType(); 301 } 302 303 /** 304 * Return the system properties name associated with the tcp buffer sizes 305 * for this network. 306 */ 307 public String getTcpBufferSizesPropName() { 308 String networkTypeStr = "unknown"; 309 TelephonyManager tm = new TelephonyManager(mContext); 310 //TODO We have to edit the parameter for getNetworkType regarding CDMA 311 switch(tm.getNetworkType()) { 312 case TelephonyManager.NETWORK_TYPE_GPRS: 313 networkTypeStr = "gprs"; 314 break; 315 case TelephonyManager.NETWORK_TYPE_EDGE: 316 networkTypeStr = "edge"; 317 break; 318 case TelephonyManager.NETWORK_TYPE_UMTS: 319 networkTypeStr = "umts"; 320 break; 321 case TelephonyManager.NETWORK_TYPE_HSDPA: 322 networkTypeStr = "hsdpa"; 323 break; 324 case TelephonyManager.NETWORK_TYPE_HSUPA: 325 networkTypeStr = "hsupa"; 326 break; 327 case TelephonyManager.NETWORK_TYPE_HSPA: 328 networkTypeStr = "hspa"; 329 break; 330 case TelephonyManager.NETWORK_TYPE_CDMA: 331 networkTypeStr = "cdma"; 332 break; 333 case TelephonyManager.NETWORK_TYPE_1xRTT: 334 networkTypeStr = "1xrtt"; 335 break; 336 case TelephonyManager.NETWORK_TYPE_EVDO_0: 337 networkTypeStr = "evdo"; 338 break; 339 case TelephonyManager.NETWORK_TYPE_EVDO_A: 340 networkTypeStr = "evdo"; 341 break; 342 case TelephonyManager.NETWORK_TYPE_EVDO_B: 343 networkTypeStr = "evdo"; 344 break; 345 } 346 return "net.tcp.buffersize." + networkTypeStr; 347 } 348 349 /** 350 * Tear down mobile data connectivity, i.e., disable the ability to create 351 * mobile data connections. 352 */ 353 @Override 354 public boolean teardown() { 355 // since we won't get a notification currently (TODO - per APN notifications) 356 // we won't get a disconnect message until all APN's on the current connection's 357 // APN list are disabled. That means privateRoutes for DNS and such will remain on - 358 // not a problem since that's all shared with whatever other APN is still on, but 359 // ugly. 360 setTeardownRequested(true); 361 return (setEnableApn(mApnType, false) != Phone.APN_REQUEST_FAILED); 362 } 363 364 /** 365 * Re-enable mobile data connectivity after a {@link #teardown()}. 366 */ 367 public boolean reconnect() { 368 setTeardownRequested(false); 369 switch (setEnableApn(mApnType, true)) { 370 case Phone.APN_ALREADY_ACTIVE: 371 // TODO - remove this when we get per-apn notifications 372 mEnabled = true; 373 // need to set self to CONNECTING so the below message is handled. 374 mMobileDataState = Phone.DataState.CONNECTING; 375 setDetailedState(DetailedState.CONNECTING, Phone.REASON_APN_CHANGED, null); 376 //send out a connected message 377 Intent intent = new Intent(TelephonyIntents. 378 ACTION_ANY_DATA_CONNECTION_STATE_CHANGED); 379 intent.putExtra(Phone.STATE_KEY, Phone.DataState.CONNECTED.toString()); 380 intent.putExtra(Phone.STATE_CHANGE_REASON_KEY, Phone.REASON_APN_CHANGED); 381 intent.putExtra(Phone.DATA_APN_TYPES_KEY, mApnTypeToWatchFor); 382 intent.putExtra(Phone.DATA_APN_KEY, mApnName); 383 intent.putExtra(Phone.DATA_IFACE_NAME_KEY, mInterfaceName); 384 intent.putExtra(Phone.NETWORK_UNAVAILABLE_KEY, false); 385 if (mStateReceiver != null) mStateReceiver.onReceive(mContext, intent); 386 break; 387 case Phone.APN_REQUEST_STARTED: 388 mEnabled = true; 389 // no need to do anything - we're already due some status update intents 390 break; 391 case Phone.APN_REQUEST_FAILED: 392 if (mPhoneService == null && mApnType == Phone.APN_TYPE_DEFAULT) { 393 // on startup we may try to talk to the phone before it's ready 394 // since the phone will come up enabled, go with that. 395 // TODO - this also comes up on telephony crash: if we think mobile data is 396 // off and the telephony stuff crashes and has to restart it will come up 397 // enabled (making a data connection). We will then be out of sync. 398 // A possible solution is a broadcast when telephony restarts. 399 mEnabled = true; 400 return false; 401 } 402 // else fall through 403 case Phone.APN_TYPE_NOT_AVAILABLE: 404 // Default is always available, but may be off due to 405 // AirplaneMode or E-Call or whatever.. 406 if (mApnType != Phone.APN_TYPE_DEFAULT) { 407 mEnabled = false; 408 } 409 break; 410 default: 411 Log.e(TAG, "Error in reconnect - unexpected response."); 412 mEnabled = false; 413 break; 414 } 415 return mEnabled; 416 } 417 418 /** 419 * Turn on or off the mobile radio. No connectivity will be possible while the 420 * radio is off. The operation is a no-op if the radio is already in the desired state. 421 * @param turnOn {@code true} if the radio should be turned on, {@code false} if 422 */ 423 public boolean setRadio(boolean turnOn) { 424 getPhoneService(false); 425 /* 426 * If the phone process has crashed in the past, we'll get a 427 * RemoteException and need to re-reference the service. 428 */ 429 for (int retry = 0; retry < 2; retry++) { 430 if (mPhoneService == null) { 431 Log.w(TAG, 432 "Ignoring mobile radio request because could not acquire PhoneService"); 433 break; 434 } 435 436 try { 437 return mPhoneService.setRadio(turnOn); 438 } catch (RemoteException e) { 439 if (retry == 0) getPhoneService(true); 440 } 441 } 442 443 Log.w(TAG, "Could not set radio power to " + (turnOn ? "on" : "off")); 444 return false; 445 } 446 447 /** 448 * Tells the phone sub-system that the caller wants to 449 * begin using the named feature. The only supported features at 450 * this time are {@code Phone.FEATURE_ENABLE_MMS}, which allows an application 451 * to specify that it wants to send and/or receive MMS data, and 452 * {@code Phone.FEATURE_ENABLE_SUPL}, which is used for Assisted GPS. 453 * @param feature the name of the feature to be used 454 * @param callingPid the process ID of the process that is issuing this request 455 * @param callingUid the user ID of the process that is issuing this request 456 * @return an integer value representing the outcome of the request. 457 * The interpretation of this value is feature-specific. 458 * specific, except that the value {@code -1} 459 * always indicates failure. For {@code Phone.FEATURE_ENABLE_MMS}, 460 * the other possible return values are 461 * <ul> 462 * <li>{@code Phone.APN_ALREADY_ACTIVE}</li> 463 * <li>{@code Phone.APN_REQUEST_STARTED}</li> 464 * <li>{@code Phone.APN_TYPE_NOT_AVAILABLE}</li> 465 * <li>{@code Phone.APN_REQUEST_FAILED}</li> 466 * </ul> 467 */ 468 public int startUsingNetworkFeature(String feature, int callingPid, int callingUid) { 469 return -1; 470 } 471 472 /** 473 * Tells the phone sub-system that the caller is finished 474 * using the named feature. The only supported feature at 475 * this time is {@code Phone.FEATURE_ENABLE_MMS}, which allows an application 476 * to specify that it wants to send and/or receive MMS data. 477 * @param feature the name of the feature that is no longer needed 478 * @param callingPid the process ID of the process that is issuing this request 479 * @param callingUid the user ID of the process that is issuing this request 480 * @return an integer value representing the outcome of the request. 481 * The interpretation of this value is feature-specific, except that 482 * the value {@code -1} always indicates failure. 483 */ 484 public int stopUsingNetworkFeature(String feature, int callingPid, int callingUid) { 485 return -1; 486 } 487 488 /** 489 * Ensure that a network route exists to deliver traffic to the specified 490 * host via the mobile data network. 491 * @param hostAddress the IP address of the host to which the route is desired, 492 * in network byte order. 493 * @return {@code true} on success, {@code false} on failure 494 */ 495 @Override 496 public boolean requestRouteToHost(int hostAddress) { 497 if (DBG) { 498 Log.d(TAG, "Requested host route to " + Integer.toHexString(hostAddress) + 499 " for " + mApnType + "(" + mInterfaceName + ")"); 500 } 501 if (mInterfaceName != null && hostAddress != -1) { 502 return NetworkUtils.addHostRoute(mInterfaceName, hostAddress) == 0; 503 } else { 504 return false; 505 } 506 } 507 508 @Override 509 public String toString() { 510 StringBuffer sb = new StringBuffer("Mobile data state: "); 511 512 sb.append(mMobileDataState); 513 return sb.toString(); 514 } 515 516 /** 517 * Internal method supporting the ENABLE_MMS feature. 518 * @param apnType the type of APN to be enabled or disabled (e.g., mms) 519 * @param enable {@code true} to enable the specified APN type, 520 * {@code false} to disable it. 521 * @return an integer value representing the outcome of the request. 522 */ 523 private int setEnableApn(String apnType, boolean enable) { 524 getPhoneService(false); 525 /* 526 * If the phone process has crashed in the past, we'll get a 527 * RemoteException and need to re-reference the service. 528 */ 529 for (int retry = 0; retry < 2; retry++) { 530 if (mPhoneService == null) { 531 Log.w(TAG, 532 "Ignoring feature request because could not acquire PhoneService"); 533 break; 534 } 535 536 try { 537 if (enable) { 538 return mPhoneService.enableApnType(apnType); 539 } else { 540 return mPhoneService.disableApnType(apnType); 541 } 542 } catch (RemoteException e) { 543 if (retry == 0) getPhoneService(true); 544 } 545 } 546 547 Log.w(TAG, "Could not " + (enable ? "enable" : "disable") 548 + " APN type \"" + apnType + "\""); 549 return Phone.APN_REQUEST_FAILED; 550 } 551 552 public static String networkTypeToApnType(int netType) { 553 switch(netType) { 554 case ConnectivityManager.TYPE_MOBILE: 555 return Phone.APN_TYPE_DEFAULT; // TODO - use just one of these 556 case ConnectivityManager.TYPE_MOBILE_MMS: 557 return Phone.APN_TYPE_MMS; 558 case ConnectivityManager.TYPE_MOBILE_SUPL: 559 return Phone.APN_TYPE_SUPL; 560 case ConnectivityManager.TYPE_MOBILE_DUN: 561 return Phone.APN_TYPE_DUN; 562 case ConnectivityManager.TYPE_MOBILE_HIPRI: 563 return Phone.APN_TYPE_HIPRI; 564 default: 565 Log.e(TAG, "Error mapping networkType " + netType + " to apnType."); 566 return null; 567 } 568 } 569 } 570
