MobileDataStateTracker.java revision c85675d0ef75ad968935ff8af9a3ed8bee29c511
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 = true; 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 + ", unavailable = " + unavailable + 147 ", reason = " + (reason == null ? "(unspecified)" : reason)); 148 149 if (isApnTypeIncluded(apnTypeList)) { 150 if (mEnabled == false) { 151 // if we're not enabled but the APN Type is supported by this connection 152 // we should record the interface name if one's provided. If the user 153 // turns on this network we will need the interfacename but won't get 154 // a fresh connected message - TODO fix this.. 155 if (mInterfaceName == null && state == Phone.DataState.CONNECTED) { 156 mInterfaceName = intent.getStringExtra(Phone.DATA_IFACE_NAME_KEY); 157 } else if (state == Phone.DataState.DISCONNECTED) { 158 mInterfaceName = null; 159 } 160 if (DBG) Log.d(TAG, " dropped - mEnabled = false"); 161 return; 162 } 163 } else { 164 if (DBG) Log.d(TAG, " dropped - wrong Apn"); 165 return; 166 } 167 168 mNetworkInfo.setIsAvailable(!unavailable); 169 if (mMobileDataState != state) { 170 mMobileDataState = state; 171 switch (state) { 172 case DISCONNECTED: 173 if(isTeardownRequested()) { 174 mEnabled = false; 175 setTeardownRequested(false); 176 } 177 178 setDetailedState(DetailedState.DISCONNECTED, reason, apnName); 179 if (mInterfaceName != null) { 180 NetworkUtils.resetConnections(mInterfaceName); 181 } 182 mInterfaceName = null; 183 mDefaultGatewayAddr = 0; 184 break; 185 case CONNECTING: 186 setDetailedState(DetailedState.CONNECTING, reason, apnName); 187 break; 188 case SUSPENDED: 189 setDetailedState(DetailedState.SUSPENDED, reason, apnName); 190 break; 191 case CONNECTED: 192 mInterfaceName = intent.getStringExtra(Phone.DATA_IFACE_NAME_KEY); 193 if (mInterfaceName == null) { 194 Log.d(TAG, "CONNECTED event did not supply interface name."); 195 } 196 setDetailedState(DetailedState.CONNECTED, reason, apnName); 197 break; 198 } 199 } 200 } else if (intent.getAction(). 201 equals(TelephonyIntents.ACTION_DATA_CONNECTION_FAILED)) { 202 mEnabled = false; 203 String reason = intent.getStringExtra(Phone.FAILURE_REASON_KEY); 204 String apnName = intent.getStringExtra(Phone.DATA_APN_KEY); 205 if (DBG) Log.d(TAG, "Received " + intent.getAction() + " broadcast" + 206 reason == null ? "" : "(" + reason + ")"); 207 setDetailedState(DetailedState.FAILED, reason, apnName); 208 } 209 TelephonyManager tm = TelephonyManager.getDefault(); 210 setRoamingStatus(tm.isNetworkRoaming()); 211 setSubtype(tm.getNetworkType(), tm.getNetworkTypeName()); 212 } 213 } 214 } 215 216 private void getPhoneService(boolean forceRefresh) { 217 if ((mPhoneService == null) || forceRefresh) { 218 mPhoneService = ITelephony.Stub.asInterface(ServiceManager.getService("phone")); 219 } 220 } 221 222 /** 223 * Report whether data connectivity is possible. 224 */ 225 public boolean isAvailable() { 226 getPhoneService(false); 227 228 /* 229 * If the phone process has crashed in the past, we'll get a 230 * RemoteException and need to re-reference the service. 231 */ 232 for (int retry = 0; retry < 2; retry++) { 233 if (mPhoneService == null) break; 234 235 try { 236 return mPhoneService.isDataConnectivityPossible(); 237 } catch (RemoteException e) { 238 // First-time failed, get the phone service again 239 if (retry == 0) getPhoneService(true); 240 } 241 } 242 243 return false; 244 } 245 246 /** 247 * {@inheritDoc} 248 * The mobile data network subtype indicates what generation network technology is in effect, 249 * e.g., GPRS, EDGE, UMTS, etc. 250 */ 251 public int getNetworkSubtype() { 252 return TelephonyManager.getDefault().getNetworkType(); 253 } 254 255 /** 256 * Return the system properties name associated with the tcp buffer sizes 257 * for this network. 258 */ 259 public String getTcpBufferSizesPropName() { 260 String networkTypeStr = "unknown"; 261 TelephonyManager tm = new TelephonyManager(mContext); 262 //TODO We have to edit the parameter for getNetworkType regarding CDMA 263 switch(tm.getNetworkType()) { 264 case TelephonyManager.NETWORK_TYPE_GPRS: 265 networkTypeStr = "gprs"; 266 break; 267 case TelephonyManager.NETWORK_TYPE_EDGE: 268 networkTypeStr = "edge"; 269 break; 270 case TelephonyManager.NETWORK_TYPE_UMTS: 271 networkTypeStr = "umts"; 272 break; 273 case TelephonyManager.NETWORK_TYPE_CDMA: 274 networkTypeStr = "cdma"; 275 break; 276 case TelephonyManager.NETWORK_TYPE_EVDO_0: 277 networkTypeStr = "evdo"; 278 break; 279 case TelephonyManager.NETWORK_TYPE_EVDO_A: 280 networkTypeStr = "evdo"; 281 break; 282 } 283 return "net.tcp.buffersize." + networkTypeStr; 284 } 285 286 /** 287 * Tear down mobile data connectivity, i.e., disable the ability to create 288 * mobile data connections. 289 */ 290 @Override 291 public boolean teardown() { 292 setTeardownRequested(true); 293 return (setEnableApn(mApnType, false) != Phone.APN_REQUEST_FAILED); 294 } 295 296 /** 297 * Re-enable mobile data connectivity after a {@link #teardown()}. 298 */ 299 public boolean reconnect() { 300 setTeardownRequested(false); 301 switch (setEnableApn(mApnType, true)) { 302 case Phone.APN_ALREADY_ACTIVE: 303 mEnabled = true; 304 //send out a connected message 305 Intent intent = new Intent(TelephonyIntents. 306 ACTION_ANY_DATA_CONNECTION_STATE_CHANGED); 307 intent.putExtra(Phone.STATE_KEY, Phone.DataState.CONNECTED.toString()); 308 intent.putExtra(Phone.STATE_CHANGE_REASON_KEY, Phone.REASON_APN_CHANGED); 309 intent.putExtra(Phone.DATA_APN_TYPES_KEY, mApnType); 310 intent.putExtra(Phone.DATA_IFACE_NAME_KEY, mInterfaceName); 311 intent.putExtra(Phone.NETWORK_UNAVAILABLE_KEY, false); 312 if (mStateReceiver != null) mStateReceiver.onReceive(mContext, intent); 313 break; 314 case Phone.APN_REQUEST_STARTED: 315 mEnabled = true; 316 // no need to do anything - we're already due some status update intents 317 break; 318 case Phone.APN_REQUEST_FAILED: 319 case Phone.APN_TYPE_NOT_AVAILABLE: 320 mEnabled = false; 321 break; 322 default: 323 Log.e(TAG, "Error in reconnect - unexpected response."); 324 mEnabled = false; 325 break; 326 } 327 return mEnabled; 328 } 329 330 /** 331 * Turn on or off the mobile radio. No connectivity will be possible while the 332 * radio is off. The operation is a no-op if the radio is already in the desired state. 333 * @param turnOn {@code true} if the radio should be turned on, {@code false} if 334 */ 335 public boolean setRadio(boolean turnOn) { 336 getPhoneService(false); 337 /* 338 * If the phone process has crashed in the past, we'll get a 339 * RemoteException and need to re-reference the service. 340 */ 341 for (int retry = 0; retry < 2; retry++) { 342 if (mPhoneService == null) { 343 Log.w(TAG, 344 "Ignoring mobile radio request because could not acquire PhoneService"); 345 break; 346 } 347 348 try { 349 return mPhoneService.setRadio(turnOn); 350 } catch (RemoteException e) { 351 if (retry == 0) getPhoneService(true); 352 } 353 } 354 355 Log.w(TAG, "Could not set radio power to " + (turnOn ? "on" : "off")); 356 return false; 357 } 358 359 /** 360 * Tells the phone sub-system that the caller wants to 361 * begin using the named feature. The only supported features at 362 * this time are {@code Phone.FEATURE_ENABLE_MMS}, which allows an application 363 * to specify that it wants to send and/or receive MMS data, and 364 * {@code Phone.FEATURE_ENABLE_SUPL}, which is used for Assisted GPS. 365 * @param feature the name of the feature to be used 366 * @param callingPid the process ID of the process that is issuing this request 367 * @param callingUid the user ID of the process that is issuing this request 368 * @return an integer value representing the outcome of the request. 369 * The interpretation of this value is feature-specific. 370 * specific, except that the value {@code -1} 371 * always indicates failure. For {@code Phone.FEATURE_ENABLE_MMS}, 372 * the other possible return values are 373 * <ul> 374 * <li>{@code Phone.APN_ALREADY_ACTIVE}</li> 375 * <li>{@code Phone.APN_REQUEST_STARTED}</li> 376 * <li>{@code Phone.APN_TYPE_NOT_AVAILABLE}</li> 377 * <li>{@code Phone.APN_REQUEST_FAILED}</li> 378 * </ul> 379 */ 380 public int startUsingNetworkFeature(String feature, int callingPid, int callingUid) { 381 return -1; 382 } 383 384 /** 385 * Tells the phone sub-system that the caller is finished 386 * using the named feature. The only supported feature at 387 * this time is {@code Phone.FEATURE_ENABLE_MMS}, which allows an application 388 * to specify that it wants to send and/or receive MMS data. 389 * @param feature the name of the feature that is no longer needed 390 * @param callingPid the process ID of the process that is issuing this request 391 * @param callingUid the user ID of the process that is issuing this request 392 * @return an integer value representing the outcome of the request. 393 * The interpretation of this value is feature-specific, except that 394 * the value {@code -1} always indicates failure. 395 */ 396 public int stopUsingNetworkFeature(String feature, int callingPid, int callingUid) { 397 return -1; 398 } 399 400 /** 401 * Ensure that a network route exists to deliver traffic to the specified 402 * host via the mobile data network. 403 * @param hostAddress the IP address of the host to which the route is desired, 404 * in network byte order. 405 * @return {@code true} on success, {@code false} on failure 406 */ 407 @Override 408 public boolean requestRouteToHost(int hostAddress) { 409 if (mInterfaceName != null && hostAddress != -1) { 410 if (DBG) { 411 Log.d(TAG, "Requested host route to " + Integer.toHexString(hostAddress)); 412 } 413 return NetworkUtils.addHostRoute(mInterfaceName, hostAddress) == 0; 414 } else { 415 return false; 416 } 417 } 418 419 @Override 420 public String toString() { 421 StringBuffer sb = new StringBuffer("Mobile data state: "); 422 423 sb.append(mMobileDataState); 424 return sb.toString(); 425 } 426 427 /** 428 * Internal method supporting the ENABLE_MMS feature. 429 * @param apnType the type of APN to be enabled or disabled (e.g., mms) 430 * @param enable {@code true} to enable the specified APN type, 431 * {@code false} to disable it. 432 * @return an integer value representing the outcome of the request. 433 */ 434 private int setEnableApn(String apnType, boolean enable) { 435 getPhoneService(false); 436 /* 437 * If the phone process has crashed in the past, we'll get a 438 * RemoteException and need to re-reference the service. 439 */ 440 for (int retry = 0; retry < 2; retry++) { 441 if (mPhoneService == null) { 442 Log.w(TAG, 443 "Ignoring feature request because could not acquire PhoneService"); 444 break; 445 } 446 447 try { 448 if (enable) { 449 return mPhoneService.enableApnType(apnType); 450 } else { 451 return mPhoneService.disableApnType(apnType); 452 } 453 } catch (RemoteException e) { 454 if (retry == 0) getPhoneService(true); 455 } 456 } 457 458 Log.w(TAG, "Could not " + (enable ? "enable" : "disable") 459 + " APN type \"" + apnType + "\""); 460 return Phone.APN_REQUEST_FAILED; 461 } 462} 463