Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 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 com.android.internal.util.Protocol; |
Irfan Sheriff | cf99765 | 2011-06-22 11:01:16 -0700 | [diff] [blame] | 20 | import com.android.internal.util.State; |
| 21 | import com.android.internal.util.StateMachine; |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 22 | |
| 23 | import android.app.AlarmManager; |
| 24 | import android.app.PendingIntent; |
| 25 | import android.content.BroadcastReceiver; |
| 26 | import android.content.Context; |
| 27 | import android.content.Intent; |
| 28 | import android.content.IntentFilter; |
Robert Greenwalt | 4717c26 | 2012-10-31 14:32:53 -0700 | [diff] [blame] | 29 | import android.net.DhcpResults; |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 30 | import android.net.NetworkUtils; |
| 31 | import android.os.Message; |
| 32 | import android.os.PowerManager; |
| 33 | import android.os.SystemClock; |
| 34 | import android.util.Log; |
| 35 | |
| 36 | /** |
| 37 | * StateMachine that interacts with the native DHCP client and can talk to |
| 38 | * a controller that also needs to be a StateMachine |
| 39 | * |
| 40 | * The Dhcp state machine provides the following features: |
| 41 | * - Wakeup and renewal using the native DHCP client (which will not renew |
| 42 | * on its own when the device is in suspend state and this can lead to device |
| 43 | * holding IP address beyond expiry) |
| 44 | * - A notification right before DHCP request or renewal is started. This |
| 45 | * can be used for any additional setup before DHCP. For example, wifi sets |
| 46 | * BT-Wifi coex settings right before DHCP is initiated |
| 47 | * |
| 48 | * @hide |
| 49 | */ |
Irfan Sheriff | cf99765 | 2011-06-22 11:01:16 -0700 | [diff] [blame] | 50 | public class DhcpStateMachine extends StateMachine { |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 51 | |
| 52 | private static final String TAG = "DhcpStateMachine"; |
Robert Greenwalt | 15dd5be | 2013-03-15 19:18:45 +0000 | [diff] [blame] | 53 | private static final boolean DBG = false; |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 54 | |
| 55 | |
| 56 | /* A StateMachine that controls the DhcpStateMachine */ |
Irfan Sheriff | cf99765 | 2011-06-22 11:01:16 -0700 | [diff] [blame] | 57 | private StateMachine mController; |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 58 | |
| 59 | private Context mContext; |
| 60 | private BroadcastReceiver mBroadcastReceiver; |
| 61 | private AlarmManager mAlarmManager; |
| 62 | private PendingIntent mDhcpRenewalIntent; |
| 63 | private PowerManager.WakeLock mDhcpRenewWakeLock; |
| 64 | private static final String WAKELOCK_TAG = "DHCP"; |
| 65 | |
Irfan Sheriff | 2c08ede | 2011-09-16 22:03:09 -0700 | [diff] [blame] | 66 | //Remember DHCP configuration from first request |
Robert Greenwalt | 4717c26 | 2012-10-31 14:32:53 -0700 | [diff] [blame] | 67 | private DhcpResults mDhcpResults; |
Irfan Sheriff | 2c08ede | 2011-09-16 22:03:09 -0700 | [diff] [blame] | 68 | |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 69 | private static final int DHCP_RENEW = 0; |
| 70 | private static final String ACTION_DHCP_RENEW = "android.net.wifi.DHCP_RENEW"; |
| 71 | |
Irfan Sheriff | 41b3588 | 2011-06-21 14:26:59 -0700 | [diff] [blame] | 72 | //Used for sanity check on setting up renewal |
| 73 | private static final int MIN_RENEWAL_TIME_SECS = 5 * 60; // 5 minutes |
| 74 | |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 75 | private enum DhcpAction { |
| 76 | START, |
| 77 | RENEW |
| 78 | }; |
| 79 | |
Robert Greenwalt | 5ddeb9e | 2013-03-13 16:33:14 -0700 | [diff] [blame] | 80 | private final String mInterfaceName; |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 81 | private boolean mRegisteredForPreDhcpNotification = false; |
| 82 | |
| 83 | private static final int BASE = Protocol.BASE_DHCP; |
| 84 | |
| 85 | /* Commands from controller to start/stop DHCP */ |
| 86 | public static final int CMD_START_DHCP = BASE + 1; |
| 87 | public static final int CMD_STOP_DHCP = BASE + 2; |
| 88 | public static final int CMD_RENEW_DHCP = BASE + 3; |
| 89 | |
| 90 | /* Notification from DHCP state machine prior to DHCP discovery/renewal */ |
| 91 | public static final int CMD_PRE_DHCP_ACTION = BASE + 4; |
| 92 | /* Notification from DHCP state machine post DHCP discovery/renewal. Indicates |
| 93 | * success/failure */ |
| 94 | public static final int CMD_POST_DHCP_ACTION = BASE + 5; |
Irfan Sheriff | 6bfc888 | 2012-08-29 15:35:57 -0700 | [diff] [blame] | 95 | /* Notification from DHCP state machine before quitting */ |
| 96 | public static final int CMD_ON_QUIT = BASE + 6; |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 97 | |
| 98 | /* Command from controller to indicate DHCP discovery/renewal can continue |
| 99 | * after pre DHCP action is complete */ |
Irfan Sheriff | 6bfc888 | 2012-08-29 15:35:57 -0700 | [diff] [blame] | 100 | public static final int CMD_PRE_DHCP_ACTION_COMPLETE = BASE + 7; |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 101 | |
| 102 | /* Message.arg1 arguments to CMD_POST_DHCP notification */ |
| 103 | public static final int DHCP_SUCCESS = 1; |
| 104 | public static final int DHCP_FAILURE = 2; |
| 105 | |
Irfan Sheriff | cf99765 | 2011-06-22 11:01:16 -0700 | [diff] [blame] | 106 | private State mDefaultState = new DefaultState(); |
| 107 | private State mStoppedState = new StoppedState(); |
| 108 | private State mWaitBeforeStartState = new WaitBeforeStartState(); |
| 109 | private State mRunningState = new RunningState(); |
| 110 | private State mWaitBeforeRenewalState = new WaitBeforeRenewalState(); |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 111 | |
Irfan Sheriff | cf99765 | 2011-06-22 11:01:16 -0700 | [diff] [blame] | 112 | private DhcpStateMachine(Context context, StateMachine controller, String intf) { |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 113 | super(TAG); |
| 114 | |
| 115 | mContext = context; |
| 116 | mController = controller; |
| 117 | mInterfaceName = intf; |
| 118 | |
| 119 | mAlarmManager = (AlarmManager)mContext.getSystemService(Context.ALARM_SERVICE); |
| 120 | Intent dhcpRenewalIntent = new Intent(ACTION_DHCP_RENEW, null); |
| 121 | mDhcpRenewalIntent = PendingIntent.getBroadcast(mContext, DHCP_RENEW, dhcpRenewalIntent, 0); |
| 122 | |
| 123 | PowerManager powerManager = (PowerManager)mContext.getSystemService(Context.POWER_SERVICE); |
| 124 | mDhcpRenewWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, WAKELOCK_TAG); |
Irfan Sheriff | cd672eb | 2011-06-21 12:23:17 -0700 | [diff] [blame] | 125 | mDhcpRenewWakeLock.setReferenceCounted(false); |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 126 | |
| 127 | mBroadcastReceiver = new BroadcastReceiver() { |
| 128 | @Override |
| 129 | public void onReceive(Context context, Intent intent) { |
| 130 | //DHCP renew |
| 131 | if (DBG) Log.d(TAG, "Sending a DHCP renewal " + this); |
Irfan Sheriff | cd672eb | 2011-06-21 12:23:17 -0700 | [diff] [blame] | 132 | //Lock released after 40s in worst case scenario |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 133 | mDhcpRenewWakeLock.acquire(40000); |
| 134 | sendMessage(CMD_RENEW_DHCP); |
| 135 | } |
| 136 | }; |
| 137 | mContext.registerReceiver(mBroadcastReceiver, new IntentFilter(ACTION_DHCP_RENEW)); |
| 138 | |
| 139 | addState(mDefaultState); |
| 140 | addState(mStoppedState, mDefaultState); |
| 141 | addState(mWaitBeforeStartState, mDefaultState); |
| 142 | addState(mRunningState, mDefaultState); |
| 143 | addState(mWaitBeforeRenewalState, mDefaultState); |
| 144 | |
| 145 | setInitialState(mStoppedState); |
| 146 | } |
| 147 | |
Irfan Sheriff | cf99765 | 2011-06-22 11:01:16 -0700 | [diff] [blame] | 148 | public static DhcpStateMachine makeDhcpStateMachine(Context context, StateMachine controller, |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 149 | String intf) { |
| 150 | DhcpStateMachine dsm = new DhcpStateMachine(context, controller, intf); |
| 151 | dsm.start(); |
| 152 | return dsm; |
| 153 | } |
| 154 | |
| 155 | /** |
| 156 | * This sends a notification right before DHCP request/renewal so that the |
| 157 | * controller can do certain actions before DHCP packets are sent out. |
| 158 | * When the controller is ready, it sends a CMD_PRE_DHCP_ACTION_COMPLETE message |
| 159 | * to indicate DHCP can continue |
| 160 | * |
| 161 | * This is used by Wifi at this time for the purpose of doing BT-Wifi coex |
| 162 | * handling during Dhcp |
| 163 | */ |
| 164 | public void registerForPreDhcpNotification() { |
| 165 | mRegisteredForPreDhcpNotification = true; |
| 166 | } |
| 167 | |
Wink Saville | bbf30dfd | 2012-05-29 12:40:46 -0700 | [diff] [blame] | 168 | /** |
| 169 | * Quit the DhcpStateMachine. |
| 170 | * |
| 171 | * @hide |
| 172 | */ |
| 173 | public void doQuit() { |
| 174 | quit(); |
| 175 | } |
| 176 | |
Irfan Sheriff | 6bfc888 | 2012-08-29 15:35:57 -0700 | [diff] [blame] | 177 | protected void onQuitting() { |
| 178 | mController.sendMessage(CMD_ON_QUIT); |
| 179 | } |
| 180 | |
Irfan Sheriff | cf99765 | 2011-06-22 11:01:16 -0700 | [diff] [blame] | 181 | class DefaultState extends State { |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 182 | @Override |
Wink Saville | bbf30dfd | 2012-05-29 12:40:46 -0700 | [diff] [blame] | 183 | public void exit() { |
| 184 | mContext.unregisterReceiver(mBroadcastReceiver); |
| 185 | } |
| 186 | @Override |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 187 | public boolean processMessage(Message message) { |
| 188 | if (DBG) Log.d(TAG, getName() + message.toString() + "\n"); |
| 189 | switch (message.what) { |
| 190 | case CMD_RENEW_DHCP: |
| 191 | Log.e(TAG, "Error! Failed to handle a DHCP renewal on " + mInterfaceName); |
Irfan Sheriff | cd672eb | 2011-06-21 12:23:17 -0700 | [diff] [blame] | 192 | mDhcpRenewWakeLock.release(); |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 193 | break; |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 194 | default: |
| 195 | Log.e(TAG, "Error! unhandled message " + message); |
| 196 | break; |
| 197 | } |
| 198 | return HANDLED; |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | |
Irfan Sheriff | cf99765 | 2011-06-22 11:01:16 -0700 | [diff] [blame] | 203 | class StoppedState extends State { |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 204 | @Override |
| 205 | public void enter() { |
| 206 | if (DBG) Log.d(TAG, getName() + "\n"); |
| 207 | } |
| 208 | |
| 209 | @Override |
| 210 | public boolean processMessage(Message message) { |
| 211 | boolean retValue = HANDLED; |
| 212 | if (DBG) Log.d(TAG, getName() + message.toString() + "\n"); |
| 213 | switch (message.what) { |
| 214 | case CMD_START_DHCP: |
| 215 | if (mRegisteredForPreDhcpNotification) { |
| 216 | /* Notify controller before starting DHCP */ |
| 217 | mController.sendMessage(CMD_PRE_DHCP_ACTION); |
| 218 | transitionTo(mWaitBeforeStartState); |
| 219 | } else { |
| 220 | if (runDhcp(DhcpAction.START)) { |
| 221 | transitionTo(mRunningState); |
| 222 | } |
| 223 | } |
| 224 | break; |
| 225 | case CMD_STOP_DHCP: |
| 226 | //ignore |
| 227 | break; |
| 228 | default: |
| 229 | retValue = NOT_HANDLED; |
| 230 | break; |
| 231 | } |
| 232 | return retValue; |
| 233 | } |
| 234 | } |
| 235 | |
Irfan Sheriff | cf99765 | 2011-06-22 11:01:16 -0700 | [diff] [blame] | 236 | class WaitBeforeStartState extends State { |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 237 | @Override |
| 238 | public void enter() { |
| 239 | if (DBG) Log.d(TAG, getName() + "\n"); |
| 240 | } |
| 241 | |
| 242 | @Override |
| 243 | public boolean processMessage(Message message) { |
| 244 | boolean retValue = HANDLED; |
| 245 | if (DBG) Log.d(TAG, getName() + message.toString() + "\n"); |
| 246 | switch (message.what) { |
| 247 | case CMD_PRE_DHCP_ACTION_COMPLETE: |
| 248 | if (runDhcp(DhcpAction.START)) { |
| 249 | transitionTo(mRunningState); |
| 250 | } else { |
| 251 | transitionTo(mStoppedState); |
| 252 | } |
| 253 | break; |
| 254 | case CMD_STOP_DHCP: |
| 255 | transitionTo(mStoppedState); |
| 256 | break; |
| 257 | case CMD_START_DHCP: |
| 258 | //ignore |
| 259 | break; |
| 260 | default: |
| 261 | retValue = NOT_HANDLED; |
| 262 | break; |
| 263 | } |
| 264 | return retValue; |
| 265 | } |
| 266 | } |
| 267 | |
Irfan Sheriff | cf99765 | 2011-06-22 11:01:16 -0700 | [diff] [blame] | 268 | class RunningState extends State { |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 269 | @Override |
| 270 | public void enter() { |
| 271 | if (DBG) Log.d(TAG, getName() + "\n"); |
| 272 | } |
| 273 | |
| 274 | @Override |
| 275 | public boolean processMessage(Message message) { |
| 276 | boolean retValue = HANDLED; |
| 277 | if (DBG) Log.d(TAG, getName() + message.toString() + "\n"); |
| 278 | switch (message.what) { |
| 279 | case CMD_STOP_DHCP: |
| 280 | mAlarmManager.cancel(mDhcpRenewalIntent); |
| 281 | if (!NetworkUtils.stopDhcp(mInterfaceName)) { |
| 282 | Log.e(TAG, "Failed to stop Dhcp on " + mInterfaceName); |
| 283 | } |
| 284 | transitionTo(mStoppedState); |
| 285 | break; |
| 286 | case CMD_RENEW_DHCP: |
| 287 | if (mRegisteredForPreDhcpNotification) { |
| 288 | /* Notify controller before starting DHCP */ |
| 289 | mController.sendMessage(CMD_PRE_DHCP_ACTION); |
| 290 | transitionTo(mWaitBeforeRenewalState); |
Irfan Sheriff | cd672eb | 2011-06-21 12:23:17 -0700 | [diff] [blame] | 291 | //mDhcpRenewWakeLock is released in WaitBeforeRenewalState |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 292 | } else { |
| 293 | if (!runDhcp(DhcpAction.RENEW)) { |
| 294 | transitionTo(mStoppedState); |
| 295 | } |
Irfan Sheriff | cd672eb | 2011-06-21 12:23:17 -0700 | [diff] [blame] | 296 | mDhcpRenewWakeLock.release(); |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 297 | } |
| 298 | break; |
| 299 | case CMD_START_DHCP: |
| 300 | //ignore |
| 301 | break; |
| 302 | default: |
| 303 | retValue = NOT_HANDLED; |
| 304 | } |
| 305 | return retValue; |
| 306 | } |
| 307 | } |
| 308 | |
Irfan Sheriff | cf99765 | 2011-06-22 11:01:16 -0700 | [diff] [blame] | 309 | class WaitBeforeRenewalState extends State { |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 310 | @Override |
| 311 | public void enter() { |
| 312 | if (DBG) Log.d(TAG, getName() + "\n"); |
| 313 | } |
| 314 | |
| 315 | @Override |
| 316 | public boolean processMessage(Message message) { |
| 317 | boolean retValue = HANDLED; |
| 318 | if (DBG) Log.d(TAG, getName() + message.toString() + "\n"); |
| 319 | switch (message.what) { |
| 320 | case CMD_STOP_DHCP: |
| 321 | mAlarmManager.cancel(mDhcpRenewalIntent); |
| 322 | if (!NetworkUtils.stopDhcp(mInterfaceName)) { |
| 323 | Log.e(TAG, "Failed to stop Dhcp on " + mInterfaceName); |
| 324 | } |
| 325 | transitionTo(mStoppedState); |
| 326 | break; |
| 327 | case CMD_PRE_DHCP_ACTION_COMPLETE: |
| 328 | if (runDhcp(DhcpAction.RENEW)) { |
| 329 | transitionTo(mRunningState); |
| 330 | } else { |
| 331 | transitionTo(mStoppedState); |
| 332 | } |
| 333 | break; |
| 334 | case CMD_START_DHCP: |
| 335 | //ignore |
| 336 | break; |
| 337 | default: |
| 338 | retValue = NOT_HANDLED; |
| 339 | break; |
| 340 | } |
| 341 | return retValue; |
| 342 | } |
Irfan Sheriff | cd672eb | 2011-06-21 12:23:17 -0700 | [diff] [blame] | 343 | @Override |
| 344 | public void exit() { |
| 345 | mDhcpRenewWakeLock.release(); |
| 346 | } |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 347 | } |
| 348 | |
| 349 | private boolean runDhcp(DhcpAction dhcpAction) { |
| 350 | boolean success = false; |
Robert Greenwalt | 4717c26 | 2012-10-31 14:32:53 -0700 | [diff] [blame] | 351 | DhcpResults dhcpResults = new DhcpResults(); |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 352 | |
| 353 | if (dhcpAction == DhcpAction.START) { |
Irfan Sheriff | 511d534 | 2012-11-03 23:20:38 -0700 | [diff] [blame] | 354 | /* Stop any existing DHCP daemon before starting new */ |
| 355 | NetworkUtils.stopDhcp(mInterfaceName); |
Irfan Sheriff | 7f8a12c | 2011-10-04 11:01:50 -0700 | [diff] [blame] | 356 | if (DBG) Log.d(TAG, "DHCP request on " + mInterfaceName); |
Robert Greenwalt | 4717c26 | 2012-10-31 14:32:53 -0700 | [diff] [blame] | 357 | success = NetworkUtils.runDhcp(mInterfaceName, dhcpResults); |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 358 | } else if (dhcpAction == DhcpAction.RENEW) { |
Irfan Sheriff | 7f8a12c | 2011-10-04 11:01:50 -0700 | [diff] [blame] | 359 | if (DBG) Log.d(TAG, "DHCP renewal on " + mInterfaceName); |
Robert Greenwalt | 4717c26 | 2012-10-31 14:32:53 -0700 | [diff] [blame] | 360 | success = NetworkUtils.runDhcpRenew(mInterfaceName, dhcpResults); |
Robert Greenwalt | 28cdf1d | 2013-03-15 10:48:46 -0700 | [diff] [blame] | 361 | if (success) dhcpResults.updateFromDhcpRequest(mDhcpResults); |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 362 | } |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 363 | if (success) { |
Irfan Sheriff | 7f8a12c | 2011-10-04 11:01:50 -0700 | [diff] [blame] | 364 | if (DBG) Log.d(TAG, "DHCP succeeded on " + mInterfaceName); |
Robert Greenwalt | 4717c26 | 2012-10-31 14:32:53 -0700 | [diff] [blame] | 365 | long leaseDuration = dhcpResults.leaseDuration; //int to long conversion |
Irfan Sheriff | 41b3588 | 2011-06-21 14:26:59 -0700 | [diff] [blame] | 366 | |
Irfan Sheriff | b9c9556 | 2011-11-21 14:03:00 -0800 | [diff] [blame] | 367 | //Sanity check for renewal |
| 368 | if (leaseDuration >= 0) { |
| 369 | //TODO: would be good to notify the user that his network configuration is |
| 370 | //bad and that the device cannot renew below MIN_RENEWAL_TIME_SECS |
| 371 | if (leaseDuration < MIN_RENEWAL_TIME_SECS) { |
| 372 | leaseDuration = MIN_RENEWAL_TIME_SECS; |
| 373 | } |
| 374 | //Do it a bit earlier than half the lease duration time |
| 375 | //to beat the native DHCP client and avoid extra packets |
| 376 | //48% for one hour lease time = 29 minutes |
| 377 | mAlarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, |
| 378 | SystemClock.elapsedRealtime() + |
| 379 | leaseDuration * 480, //in milliseconds |
| 380 | mDhcpRenewalIntent); |
| 381 | } else { |
| 382 | //infinite lease time, no renewal needed |
| 383 | } |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 384 | |
Robert Greenwalt | 4717c26 | 2012-10-31 14:32:53 -0700 | [diff] [blame] | 385 | mDhcpResults = dhcpResults; |
| 386 | mController.obtainMessage(CMD_POST_DHCP_ACTION, DHCP_SUCCESS, 0, dhcpResults) |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 387 | .sendToTarget(); |
| 388 | } else { |
Irfan Sheriff | 7f8a12c | 2011-10-04 11:01:50 -0700 | [diff] [blame] | 389 | Log.e(TAG, "DHCP failed on " + mInterfaceName + ": " + |
Irfan Sheriff | 914ed90 | 2011-06-21 14:26:37 -0700 | [diff] [blame] | 390 | NetworkUtils.getDhcpError()); |
| 391 | NetworkUtils.stopDhcp(mInterfaceName); |
| 392 | mController.obtainMessage(CMD_POST_DHCP_ACTION, DHCP_FAILURE, 0) |
| 393 | .sendToTarget(); |
| 394 | } |
| 395 | return success; |
| 396 | } |
| 397 | } |