MobileDataStateTracker.java revision bd0a81ff1c0e92e80e05e2f12bb1805c7d081e94
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 17package android.net; 18 19import android.content.BroadcastReceiver; 20import android.content.Context; 21import android.content.Intent; 22import android.content.IntentFilter; 23import android.os.RemoteException; 24import android.os.Handler; 25import android.os.ServiceManager; 26import android.os.SystemProperties; 27import com.android.internal.telephony.ITelephony; 28import com.android.internal.telephony.Phone; 29import com.android.internal.telephony.TelephonyIntents; 30import android.net.NetworkInfo.DetailedState; 31import android.telephony.TelephonyManager; 32import android.util.Log; 33import 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 */ 42public 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 boolean mEnabled; 52 private BroadcastReceiver mStateReceiver; 53 54 /** 55 * Create a new MobileDataStateTracker 56 * @param context the application context of the caller 57 * @param target a message handler for getting callbacks about state changes 58 * @param netType the ConnectivityManager network type 59 * @param apnType the Phone apnType 60 * @param tag the name of this network 61 */ 62 public MobileDataStateTracker(Context context, Handler target, 63 int netType, String apnType, String tag) { 64 super(context, target, netType, 65 TelephonyManager.getDefault().getNetworkType(), tag, 66 TelephonyManager.getDefault().getNetworkTypeName()); 67 mApnType = apnType; 68 mPhoneService = null; 69 if(netType == ConnectivityManager.TYPE_MOBILE) { 70 mEnabled = true; 71 } else { 72 mEnabled = false; 73 } 74 75 mDnsPropNames = new String[] { 76 "net.rmnet0.dns1", 77 "net.rmnet0.dns2", 78 "net.eth0.dns1", 79 "net.eth0.dns2", 80 "net.eth0.dns3", 81 "net.eth0.dns4", 82 "net.gprs.dns1", 83 "net.gprs.dns2", 84 "net.ppp0.dns1", 85 "net.ppp0.dns2"}; 86 87 } 88 89 /** 90 * Begin monitoring mobile data connectivity. 91 */ 92 public void startMonitoring() { 93 IntentFilter filter = 94 new IntentFilter(TelephonyIntents.ACTION_ANY_DATA_CONNECTION_STATE_CHANGED); 95 filter.addAction(TelephonyIntents.ACTION_DATA_CONNECTION_FAILED); 96 filter.addAction(TelephonyIntents.ACTION_SERVICE_STATE_CHANGED); 97 98 mStateReceiver = new MobileDataStateReceiver(); 99 Intent intent = mContext.registerReceiver(mStateReceiver, filter); 100 if (intent != null) 101 mMobileDataState = getMobileDataState(intent); 102 else 103 mMobileDataState = Phone.DataState.DISCONNECTED; 104 } 105 106 private Phone.DataState getMobileDataState(Intent intent) { 107 String str = intent.getStringExtra(Phone.STATE_KEY); 108 if (str != null) { 109 String apnTypeList = 110 intent.getStringExtra(Phone.DATA_APN_TYPES_KEY); 111 if (isApnTypeIncluded(apnTypeList)) { 112 return Enum.valueOf(Phone.DataState.class, str); 113 } 114 } 115 return Phone.DataState.DISCONNECTED; 116 } 117 118 private boolean isApnTypeIncluded(String typeList) { 119 /* comma seperated list - split and check */ 120 if (typeList == null) 121 return false; 122 123 String[] list = typeList.split(","); 124 for(int i=0; i< list.length; i++) { 125 if (TextUtils.equals(list[i], mApnType) || 126 TextUtils.equals(list[i], Phone.APN_TYPE_ALL)) { 127 return true; 128 } 129 } 130 return false; 131 } 132 133 private class MobileDataStateReceiver extends BroadcastReceiver { 134 public void onReceive(Context context, Intent intent) { 135 synchronized(this) { 136 if (intent.getAction().equals(TelephonyIntents. 137 ACTION_ANY_DATA_CONNECTION_STATE_CHANGED)) { 138 Phone.DataState state = getMobileDataState(intent); 139 String reason = intent.getStringExtra(Phone.STATE_CHANGE_REASON_KEY); 140 String apnName = intent.getStringExtra(Phone.DATA_APN_KEY); 141 String apnTypeList = intent.getStringExtra(Phone.DATA_APN_TYPES_KEY); 142 143 boolean unavailable = intent.getBooleanExtra(Phone.NETWORK_UNAVAILABLE_KEY, 144 false); 145 if (DBG) Log.d(TAG, mApnType + " Received " + intent.getAction() + 146 " broadcast - state = " + state + ", oldstate = " + mMobileDataState + 147 ", unavailable = " + unavailable + ", reason = " + 148 (reason == null ? "(unspecified)" : reason) + 149 ", apnTypeList = " + apnTypeList); 150 151 // set this regardless of the apnTypeList. It's all the same radio/network 152 // underneath 153 mNetworkInfo.setIsAvailable(!unavailable); 154 155 if (isApnTypeIncluded(apnTypeList)) { 156 if (mEnabled == false) { 157 // if we're not enabled but the APN Type is supported by this connection 158 // we should record the interface name if one's provided. If the user 159 // turns on this network we will need the interfacename but won't get 160 // a fresh connected message - TODO fix this when we get per-APN 161 // notifications 162 if (state == Phone.DataState.CONNECTED) { 163 if (DBG) Log.d(TAG, "replacing old mInterfaceName (" + 164 mInterfaceName + ") with " + 165 intent.getStringExtra(Phone.DATA_IFACE_NAME_KEY) + 166 " for " + mApnType); 167 mInterfaceName = intent.getStringExtra(Phone.DATA_IFACE_NAME_KEY); 168 } 169 if (DBG) Log.d(TAG, " dropped - mEnabled = false"); 170 return; 171 } 172 } else { 173 if (DBG) Log.d(TAG, " dropped - wrong Apn"); 174 return; 175 } 176 177 if (mMobileDataState != state) { 178 mMobileDataState = state; 179 switch (state) { 180 case DISCONNECTED: 181 if(isTeardownRequested()) { 182 mEnabled = false; 183 setTeardownRequested(false); 184 } 185 186 setDetailedState(DetailedState.DISCONNECTED, reason, apnName); 187 if (mInterfaceName != null) { 188 NetworkUtils.resetConnections(mInterfaceName); 189 } 190 // can't do this here - ConnectivityService needs it to clear stuff 191 // it's ok though - just leave it to be refreshed next time 192 // we connect. 193 //if (DBG) Log.d(TAG, "clearing mInterfaceName for "+ mApnType + 194 // " as it DISCONNECTED"); 195 //mInterfaceName = null; 196 //mDefaultGatewayAddr = 0; 197 break; 198 case CONNECTING: 199 setDetailedState(DetailedState.CONNECTING, reason, apnName); 200 break; 201 case SUSPENDED: 202 setDetailedState(DetailedState.SUSPENDED, reason, apnName); 203 break; 204 case CONNECTED: 205 mInterfaceName = intent.getStringExtra(Phone.DATA_IFACE_NAME_KEY); 206 if (mInterfaceName == null) { 207 Log.d(TAG, "CONNECTED event did not supply interface name."); 208 } 209 setDetailedState(DetailedState.CONNECTED, reason, apnName); 210 break; 211 } 212 } 213 } else if (intent.getAction(). 214 equals(TelephonyIntents.ACTION_DATA_CONNECTION_FAILED)) { 215 mEnabled = false; 216 String reason = intent.getStringExtra(Phone.FAILURE_REASON_KEY); 217 String apnName = intent.getStringExtra(Phone.DATA_APN_KEY); 218 if (DBG) Log.d(TAG, "Received " + intent.getAction() + " broadcast" + 219 reason == null ? "" : "(" + reason + ")"); 220 setDetailedState(DetailedState.FAILED, reason, apnName); 221 } 222 TelephonyManager tm = TelephonyManager.getDefault(); 223 setRoamingStatus(tm.isNetworkRoaming()); 224 setSubtype(tm.getNetworkType(), tm.getNetworkTypeName()); 225 } 226 } 227 } 228 229 private void getPhoneService(boolean forceRefresh) { 230 if ((mPhoneService == null) || forceRefresh) { 231 mPhoneService = ITelephony.Stub.asInterface(ServiceManager.getService("phone")); 232 } 233 } 234 235 /** 236 * Report whether data connectivity is possible. 237 */ 238 public boolean isAvailable() { 239 getPhoneService(false); 240 241 /* 242 * If the phone process has crashed in the past, we'll get a 243 * RemoteException and need to re-reference the service. 244 */ 245 for (int retry = 0; retry < 2; retry++) { 246 if (mPhoneService == null) break; 247 248 try { 249 return mPhoneService.isDataConnectivityPossible(); 250 } catch (RemoteException e) { 251 // First-time failed, get the phone service again 252 if (retry == 0) getPhoneService(true); 253 } 254 } 255 256 return false; 257 } 258 259 /** 260 * {@inheritDoc} 261 * The mobile data network subtype indicates what generation network technology is in effect, 262 * e.g., GPRS, EDGE, UMTS, etc. 263 */ 264 public int getNetworkSubtype() { 265 return TelephonyManager.getDefault().getNetworkType(); 266 } 267 268 /** 269 * Return the system properties name associated with the tcp buffer sizes 270 * for this network. 271 */ 272 public String getTcpBufferSizesPropName() { 273 String networkTypeStr = "unknown"; 274 TelephonyManager tm = new TelephonyManager(mContext); 275 //TODO We have to edit the parameter for getNetworkType regarding CDMA 276 switch(tm.getNetworkType()) { 277 case TelephonyManager.NETWORK_TYPE_GPRS: 278 networkTypeStr = "gprs"; 279 break; 280 case TelephonyManager.NETWORK_TYPE_EDGE: 281 networkTypeStr = "edge"; 282 break; 283 case TelephonyManager.NETWORK_TYPE_UMTS: 284 networkTypeStr = "umts"; 285 break; 286 case TelephonyManager.NETWORK_TYPE_HSDPA: 287 networkTypeStr = "hsdpa"; 288 break; 289 case TelephonyManager.NETWORK_TYPE_HSUPA: 290 networkTypeStr = "hsupa"; 291 break; 292 case TelephonyManager.NETWORK_TYPE_HSPA: 293 networkTypeStr = "hspa"; 294 break; 295 case TelephonyManager.NETWORK_TYPE_CDMA: 296 networkTypeStr = "cdma"; 297 break; 298 case TelephonyManager.NETWORK_TYPE_1xRTT: 299 networkTypeStr = "1xrtt"; 300 break; 301 case TelephonyManager.NETWORK_TYPE_EVDO_0: 302 networkTypeStr = "evdo"; 303 break; 304 case TelephonyManager.NETWORK_TYPE_EVDO_A: 305 networkTypeStr = "evdo"; 306 break; 307 } 308 return "net.tcp.buffersize." + networkTypeStr; 309 } 310 311 /** 312 * Tear down mobile data connectivity, i.e., disable the ability to create 313 * mobile data connections. 314 */ 315 @Override 316 public boolean teardown() { 317 // since we won't get a notification currently (TODO - per APN notifications) 318 // we won't get a disconnect message until all APN's on the current connection's 319 // APN list are disabled. That means privateRoutes for DNS and such will remain on - 320 // not a problem since that's all shared with whatever other APN is still on, but 321 // ugly. 322 setTeardownRequested(true); 323 return (setEnableApn(mApnType, false) != Phone.APN_REQUEST_FAILED); 324 } 325 326 /** 327 * Re-enable mobile data connectivity after a {@link #teardown()}. 328 */ 329 public boolean reconnect() { 330 setTeardownRequested(false); 331 switch (setEnableApn(mApnType, true)) { 332 case Phone.APN_ALREADY_ACTIVE: 333 // TODO - remove this when we get per-apn notifications 334 mEnabled = true; 335 // need to set self to CONNECTING so the below message is handled. 336 mMobileDataState = Phone.DataState.CONNECTING; 337 setDetailedState(DetailedState.CONNECTING, Phone.REASON_APN_CHANGED, null); 338 //send out a connected message 339 Intent intent = new Intent(TelephonyIntents. 340 ACTION_ANY_DATA_CONNECTION_STATE_CHANGED); 341 intent.putExtra(Phone.STATE_KEY, Phone.DataState.CONNECTED.toString()); 342 intent.putExtra(Phone.STATE_CHANGE_REASON_KEY, Phone.REASON_APN_CHANGED); 343 intent.putExtra(Phone.DATA_APN_TYPES_KEY, mApnType); 344 intent.putExtra(Phone.DATA_IFACE_NAME_KEY, mInterfaceName); 345 intent.putExtra(Phone.NETWORK_UNAVAILABLE_KEY, false); 346 if (mStateReceiver != null) mStateReceiver.onReceive(mContext, intent); 347 break; 348 case Phone.APN_REQUEST_STARTED: 349 mEnabled = true; 350 // no need to do anything - we're already due some status update intents 351 break; 352 case Phone.APN_REQUEST_FAILED: 353 if (mPhoneService == null && mApnType == Phone.APN_TYPE_DEFAULT) { 354 // on startup we may try to talk to the phone before it's ready 355 // just leave mEnabled as it is for the default apn. 356 return false; 357 } 358 // else fall through 359 case Phone.APN_TYPE_NOT_AVAILABLE: 360 mEnabled = false; 361 break; 362 default: 363 Log.e(TAG, "Error in reconnect - unexpected response."); 364 mEnabled = false; 365 break; 366 } 367 return mEnabled; 368 } 369 370 /** 371 * Turn on or off the mobile radio. No connectivity will be possible while the 372 * radio is off. The operation is a no-op if the radio is already in the desired state. 373 * @param turnOn {@code true} if the radio should be turned on, {@code false} if 374 */ 375 public boolean setRadio(boolean turnOn) { 376 getPhoneService(false); 377 /* 378 * If the phone process has crashed in the past, we'll get a 379 * RemoteException and need to re-reference the service. 380 */ 381 for (int retry = 0; retry < 2; retry++) { 382 if (mPhoneService == null) { 383 Log.w(TAG, 384 "Ignoring mobile radio request because could not acquire PhoneService"); 385 break; 386 } 387 388 try { 389 return mPhoneService.setRadio(turnOn); 390 } catch (RemoteException e) { 391 if (retry == 0) getPhoneService(true); 392 } 393 } 394 395 Log.w(TAG, "Could not set radio power to " + (turnOn ? "on" : "off")); 396 return false; 397 } 398 399 /** 400 * Tells the phone sub-system that the caller wants to 401 * begin using the named feature. The only supported features at 402 * this time are {@code Phone.FEATURE_ENABLE_MMS}, which allows an application 403 * to specify that it wants to send and/or receive MMS data, and 404 * {@code Phone.FEATURE_ENABLE_SUPL}, which is used for Assisted GPS. 405 * @param feature the name of the feature to be used 406 * @param callingPid the process ID of the process that is issuing this request 407 * @param callingUid the user ID of the process that is issuing this request 408 * @return an integer value representing the outcome of the request. 409 * The interpretation of this value is feature-specific. 410 * specific, except that the value {@code -1} 411 * always indicates failure. For {@code Phone.FEATURE_ENABLE_MMS}, 412 * the other possible return values are 413 * <ul> 414 * <li>{@code Phone.APN_ALREADY_ACTIVE}</li> 415 * <li>{@code Phone.APN_REQUEST_STARTED}</li> 416 * <li>{@code Phone.APN_TYPE_NOT_AVAILABLE}</li> 417 * <li>{@code Phone.APN_REQUEST_FAILED}</li> 418 * </ul> 419 */ 420 public int startUsingNetworkFeature(String feature, int callingPid, int callingUid) { 421 return -1; 422 } 423 424 /** 425 * Tells the phone sub-system that the caller is finished 426 * using the named feature. The only supported feature at 427 * this time is {@code Phone.FEATURE_ENABLE_MMS}, which allows an application 428 * to specify that it wants to send and/or receive MMS data. 429 * @param feature the name of the feature that is no longer needed 430 * @param callingPid the process ID of the process that is issuing this request 431 * @param callingUid the user ID of the process that is issuing this request 432 * @return an integer value representing the outcome of the request. 433 * The interpretation of this value is feature-specific, except that 434 * the value {@code -1} always indicates failure. 435 */ 436 public int stopUsingNetworkFeature(String feature, int callingPid, int callingUid) { 437 return -1; 438 } 439 440 /** 441 * Ensure that a network route exists to deliver traffic to the specified 442 * host via the mobile data network. 443 * @param hostAddress the IP address of the host to which the route is desired, 444 * in network byte order. 445 * @return {@code true} on success, {@code false} on failure 446 */ 447 @Override 448 public boolean requestRouteToHost(int hostAddress) { 449 if (DBG) { 450 Log.d(TAG, "Requested host route to " + Integer.toHexString(hostAddress) + 451 " for " + mApnType + "(" + mInterfaceName + ")"); 452 } 453 if (mInterfaceName != null && hostAddress != -1) { 454 return NetworkUtils.addHostRoute(mInterfaceName, hostAddress) == 0; 455 } else { 456 return false; 457 } 458 } 459 460 @Override 461 public String toString() { 462 StringBuffer sb = new StringBuffer("Mobile data state: "); 463 464 sb.append(mMobileDataState); 465 return sb.toString(); 466 } 467 468 /** 469 * Internal method supporting the ENABLE_MMS feature. 470 * @param apnType the type of APN to be enabled or disabled (e.g., mms) 471 * @param enable {@code true} to enable the specified APN type, 472 * {@code false} to disable it. 473 * @return an integer value representing the outcome of the request. 474 */ 475 private int setEnableApn(String apnType, boolean enable) { 476 getPhoneService(false); 477 /* 478 * If the phone process has crashed in the past, we'll get a 479 * RemoteException and need to re-reference the service. 480 */ 481 for (int retry = 0; retry < 2; retry++) { 482 if (mPhoneService == null) { 483 Log.w(TAG, 484 "Ignoring feature request because could not acquire PhoneService"); 485 break; 486 } 487 488 try { 489 if (enable) { 490 return mPhoneService.enableApnType(apnType); 491 } else { 492 return mPhoneService.disableApnType(apnType); 493 } 494 } catch (RemoteException e) { 495 if (retry == 0) getPhoneService(true); 496 } 497 } 498 499 Log.w(TAG, "Could not " + (enable ? "enable" : "disable") 500 + " APN type \"" + apnType + "\""); 501 return Phone.APN_REQUEST_FAILED; 502 } 503} 504