1 /* 2 * Copyright (C) 2010 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.connectivity; 18 19 import android.app.Notification; 20 import android.app.NotificationManager; 21 import android.app.PendingIntent; 22 import android.content.BroadcastReceiver; 23 import android.content.Context; 24 import android.content.Intent; 25 import android.content.IntentFilter; 26 import android.content.pm.PackageManager; 27 import android.content.res.Resources; 28 import android.hardware.usb.UsbManager; 29 import android.net.ConnectivityManager; 30 import android.net.IConnectivityManager; 31 import android.net.INetworkManagementEventObserver; 32 import android.net.INetworkStatsService; 33 import android.net.InterfaceConfiguration; 34 import android.net.LinkAddress; 35 import android.net.LinkProperties; 36 import android.net.NetworkInfo; 37 import android.net.NetworkUtils; 38 import android.os.Binder; 39 import android.os.HandlerThread; 40 import android.os.IBinder; 41 import android.os.INetworkManagementService; 42 import android.os.Looper; 43 import android.os.Message; 44 import android.os.RemoteException; 45 import android.os.ServiceManager; 46 import android.provider.Settings; 47 import android.util.Log; 48 49 import com.android.internal.telephony.Phone; 50 import com.android.internal.util.IState; 51 import com.android.internal.util.State; 52 import com.android.internal.util.StateMachine; 53 import com.google.android.collect.Lists; 54 55 import java.io.FileDescriptor; 56 import java.io.PrintWriter; 57 import java.net.InetAddress; 58 import java.net.Inet4Address; 59 import java.util.ArrayList; 60 import java.util.Collection; 61 import java.util.HashMap; 62 import java.util.Iterator; 63 import java.util.Set; 64 65 /** 66 * @hide 67 * 68 * Timeout 69 * 70 * TODO - look for parent classes and code sharing 71 */ 72 public class Tethering extends INetworkManagementEventObserver.Stub { 73 74 private Context mContext; 75 private final static String TAG = "Tethering"; 76 private final static boolean DBG = true; 77 private final static boolean VDBG = false; 78 79 // TODO - remove both of these - should be part of interface inspection/selection stuff 80 private String[] mTetherableUsbRegexs; 81 private String[] mTetherableWifiRegexs; 82 private String[] mTetherableBluetoothRegexs; 83 private Collection<Integer> mUpstreamIfaceTypes; 84 85 // used to synchronize public access to members 86 private Object mPublicSync; 87 88 private static final Integer MOBILE_TYPE = new Integer(ConnectivityManager.TYPE_MOBILE); 89 private static final Integer HIPRI_TYPE = new Integer(ConnectivityManager.TYPE_MOBILE_HIPRI); 90 private static final Integer DUN_TYPE = new Integer(ConnectivityManager.TYPE_MOBILE_DUN); 91 92 // if we have to connect to mobile, what APN type should we use? Calculated by examining the 93 // upstream type list and the DUN_REQUIRED secure-setting 94 private int mPreferredUpstreamMobileApn = ConnectivityManager.TYPE_NONE; 95 96 private final INetworkManagementService mNMService; 97 private final INetworkStatsService mStatsService; 98 private final IConnectivityManager mConnService; 99 private Looper mLooper; 100 private HandlerThread mThread; 101 102 private HashMap<String, TetherInterfaceSM> mIfaces; // all tethered/tetherable ifaces 103 104 private BroadcastReceiver mStateReceiver; 105 106 private static final String USB_NEAR_IFACE_ADDR = "192.168.42.129"; 107 private static final int USB_PREFIX_LENGTH = 24; 108 109 // USB is 192.168.42.1 and 255.255.255.0 110 // Wifi is 192.168.43.1 and 255.255.255.0 111 // BT is limited to max default of 5 connections. 192.168.44.1 to 192.168.48.1 112 // with 255.255.255.0 113 114 private String[] mDhcpRange; 115 private static final String[] DHCP_DEFAULT_RANGE = { 116 "192.168.42.2", "192.168.42.254", "192.168.43.2", "192.168.43.254", 117 "192.168.44.2", "192.168.44.254", "192.168.45.2", "192.168.45.254", 118 "192.168.46.2", "192.168.46.254", "192.168.47.2", "192.168.47.254", 119 "192.168.48.2", "192.168.48.254", 120 }; 121 122 private String[] mDefaultDnsServers; 123 private static final String DNS_DEFAULT_SERVER1 = "8.8.8.8"; 124 private static final String DNS_DEFAULT_SERVER2 = "8.8.4.4"; 125 126 private StateMachine mTetherMasterSM; 127 128 private Notification mTetheredNotification; 129 130 private boolean mRndisEnabled; // track the RNDIS function enabled state 131 private boolean mUsbTetherRequested; // true if USB tethering should be started 132 // when RNDIS is enabled 133 134 public Tethering(Context context, INetworkManagementService nmService, 135 INetworkStatsService statsService, IConnectivityManager connService, Looper looper) { 136 mContext = context; 137 mNMService = nmService; 138 mStatsService = statsService; 139 mConnService = connService; 140 mLooper = looper; 141 142 mPublicSync = new Object(); 143 144 mIfaces = new HashMap<String, TetherInterfaceSM>(); 145 146 // make our own thread so we don't anr the system 147 mThread = new HandlerThread("Tethering"); 148 mThread.start(); 149 mLooper = mThread.getLooper(); 150 mTetherMasterSM = new TetherMasterSM("TetherMaster", mLooper); 151 mTetherMasterSM.start(); 152 153 mStateReceiver = new StateReceiver(); 154 IntentFilter filter = new IntentFilter(); 155 filter.addAction(UsbManager.ACTION_USB_STATE); 156 filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION); 157 mContext.registerReceiver(mStateReceiver, filter); 158 159 filter = new IntentFilter(); 160 filter.addAction(Intent.ACTION_MEDIA_SHARED); 161 filter.addAction(Intent.ACTION_MEDIA_UNSHARED); 162 filter.addDataScheme("file"); 163 mContext.registerReceiver(mStateReceiver, filter); 164 165 mDhcpRange = context.getResources().getStringArray( 166 com.android.internal.R.array.config_tether_dhcp_range); 167 if ((mDhcpRange.length == 0) || (mDhcpRange.length % 2 ==1)) { 168 mDhcpRange = DHCP_DEFAULT_RANGE; 169 } 170 171 // load device config info 172 updateConfiguration(); 173 174 // TODO - remove and rely on real notifications of the current iface 175 mDefaultDnsServers = new String[2]; 176 mDefaultDnsServers[0] = DNS_DEFAULT_SERVER1; 177 mDefaultDnsServers[1] = DNS_DEFAULT_SERVER2; 178 } 179 180 void updateConfiguration() { 181 String[] tetherableUsbRegexs = mContext.getResources().getStringArray( 182 com.android.internal.R.array.config_tether_usb_regexs); 183 String[] tetherableWifiRegexs = mContext.getResources().getStringArray( 184 com.android.internal.R.array.config_tether_wifi_regexs); 185 String[] tetherableBluetoothRegexs = mContext.getResources().getStringArray( 186 com.android.internal.R.array.config_tether_bluetooth_regexs); 187 188 int ifaceTypes[] = mContext.getResources().getIntArray( 189 com.android.internal.R.array.config_tether_upstream_types); 190 Collection<Integer> upstreamIfaceTypes = new ArrayList(); 191 for (int i : ifaceTypes) { 192 upstreamIfaceTypes.add(new Integer(i)); 193 } 194 195 synchronized (mPublicSync) { 196 mTetherableUsbRegexs = tetherableUsbRegexs; 197 mTetherableWifiRegexs = tetherableWifiRegexs; 198 mTetherableBluetoothRegexs = tetherableBluetoothRegexs; 199 mUpstreamIfaceTypes = upstreamIfaceTypes; 200 } 201 202 // check if the upstream type list needs to be modified due to secure-settings 203 checkDunRequired(); 204 } 205 206 public void interfaceStatusChanged(String iface, boolean up) { 207 if (VDBG) Log.d(TAG, "interfaceStatusChanged " + iface + ", " + up); 208 boolean found = false; 209 boolean usb = false; 210 synchronized (mPublicSync) { 211 if (isWifi(iface)) { 212 found = true; 213 } else if (isUsb(iface)) { 214 found = true; 215 usb = true; 216 } else if (isBluetooth(iface)) { 217 found = true; 218 } 219 if (found == false) return; 220 221 TetherInterfaceSM sm = mIfaces.get(iface); 222 if (up) { 223 if (sm == null) { 224 sm = new TetherInterfaceSM(iface, mLooper, usb); 225 mIfaces.put(iface, sm); 226 sm.start(); 227 } 228 } else { 229 if (isUsb(iface)) { 230 // ignore usb0 down after enabling RNDIS 231 // we will handle disconnect in interfaceRemoved instead 232 if (VDBG) Log.d(TAG, "ignore interface down for " + iface); 233 } else if (sm != null) { 234 sm.sendMessage(TetherInterfaceSM.CMD_INTERFACE_DOWN); 235 mIfaces.remove(iface); 236 } 237 } 238 } 239 } 240 241 public void interfaceLinkStateChanged(String iface, boolean up) { 242 if (VDBG) Log.d(TAG, "interfaceLinkStateChanged " + iface + ", " + up); 243 interfaceStatusChanged(iface, up); 244 } 245 246 private boolean isUsb(String iface) { 247 synchronized (mPublicSync) { 248 for (String regex : mTetherableUsbRegexs) { 249 if (iface.matches(regex)) return true; 250 } 251 return false; 252 } 253 } 254 255 public boolean isWifi(String iface) { 256 synchronized (mPublicSync) { 257 for (String regex : mTetherableWifiRegexs) { 258 if (iface.matches(regex)) return true; 259 } 260 return false; 261 } 262 } 263 264 public boolean isBluetooth(String iface) { 265 synchronized (mPublicSync) { 266 for (String regex : mTetherableBluetoothRegexs) { 267 if (iface.matches(regex)) return true; 268 } 269 return false; 270 } 271 } 272 273 public void interfaceAdded(String iface) { 274 if (VDBG) Log.d(TAG, "interfaceAdded " + iface); 275 boolean found = false; 276 boolean usb = false; 277 synchronized (mPublicSync) { 278 if (isWifi(iface)) { 279 found = true; 280 } 281 if (isUsb(iface)) { 282 found = true; 283 usb = true; 284 } 285 if (isBluetooth(iface)) { 286 found = true; 287 } 288 if (found == false) { 289 if (VDBG) Log.d(TAG, iface + " is not a tetherable iface, ignoring"); 290 return; 291 } 292 293 TetherInterfaceSM sm = mIfaces.get(iface); 294 if (sm != null) { 295 if (VDBG) Log.d(TAG, "active iface (" + iface + ") reported as added, ignoring"); 296 return; 297 } 298 sm = new TetherInterfaceSM(iface, mLooper, usb); 299 mIfaces.put(iface, sm); 300 sm.start(); 301 } 302 } 303 304 public void interfaceRemoved(String iface) { 305 if (VDBG) Log.d(TAG, "interfaceRemoved " + iface); 306 synchronized (mPublicSync) { 307 TetherInterfaceSM sm = mIfaces.get(iface); 308 if (sm == null) { 309 if (VDBG) { 310 Log.e(TAG, "attempting to remove unknown iface (" + iface + "), ignoring"); 311 } 312 return; 313 } 314 sm.sendMessage(TetherInterfaceSM.CMD_INTERFACE_DOWN); 315 mIfaces.remove(iface); 316 } 317 } 318 319 public void limitReached(String limitName, String iface) {} 320 321 public int tether(String iface) { 322 if (DBG) Log.d(TAG, "Tethering " + iface); 323 TetherInterfaceSM sm = null; 324 synchronized (mPublicSync) { 325 sm = mIfaces.get(iface); 326 } 327 if (sm == null) { 328 Log.e(TAG, "Tried to Tether an unknown iface :" + iface + ", ignoring"); 329 return ConnectivityManager.TETHER_ERROR_UNKNOWN_IFACE; 330 } 331 if (!sm.isAvailable() && !sm.isErrored()) { 332 Log.e(TAG, "Tried to Tether an unavailable iface :" + iface + ", ignoring"); 333 return ConnectivityManager.TETHER_ERROR_UNAVAIL_IFACE; 334 } 335 sm.sendMessage(TetherInterfaceSM.CMD_TETHER_REQUESTED); 336 return ConnectivityManager.TETHER_ERROR_NO_ERROR; 337 } 338 339 public int untether(String iface) { 340 if (DBG) Log.d(TAG, "Untethering " + iface); 341 TetherInterfaceSM sm = null; 342 synchronized (mPublicSync) { 343 sm = mIfaces.get(iface); 344 } 345 if (sm == null) { 346 Log.e(TAG, "Tried to Untether an unknown iface :" + iface + ", ignoring"); 347 return ConnectivityManager.TETHER_ERROR_UNKNOWN_IFACE; 348 } 349 if (sm.isErrored()) { 350 Log.e(TAG, "Tried to Untethered an errored iface :" + iface + ", ignoring"); 351 return ConnectivityManager.TETHER_ERROR_UNAVAIL_IFACE; 352 } 353 sm.sendMessage(TetherInterfaceSM.CMD_TETHER_UNREQUESTED); 354 return ConnectivityManager.TETHER_ERROR_NO_ERROR; 355 } 356 357 public int getLastTetherError(String iface) { 358 TetherInterfaceSM sm = null; 359 synchronized (mPublicSync) { 360 sm = mIfaces.get(iface); 361 if (sm == null) { 362 Log.e(TAG, "Tried to getLastTetherError on an unknown iface :" + iface + 363 ", ignoring"); 364 return ConnectivityManager.TETHER_ERROR_UNKNOWN_IFACE; 365 } 366 return sm.getLastError(); 367 } 368 } 369 370 // TODO - move all private methods used only by the state machine into the state machine 371 // to clarify what needs synchronized protection. 372 private void sendTetherStateChangedBroadcast() { 373 try { 374 if (!mConnService.isTetheringSupported()) return; 375 } catch (RemoteException e) { 376 return; 377 } 378 379 ArrayList<String> availableList = new ArrayList<String>(); 380 ArrayList<String> activeList = new ArrayList<String>(); 381 ArrayList<String> erroredList = new ArrayList<String>(); 382 383 boolean wifiTethered = false; 384 boolean usbTethered = false; 385 boolean bluetoothTethered = false; 386 387 synchronized (mPublicSync) { 388 Set ifaces = mIfaces.keySet(); 389 for (Object iface : ifaces) { 390 TetherInterfaceSM sm = mIfaces.get(iface); 391 if (sm != null) { 392 if (sm.isErrored()) { 393 erroredList.add((String)iface); 394 } else if (sm.isAvailable()) { 395 availableList.add((String)iface); 396 } else if (sm.isTethered()) { 397 if (isUsb((String)iface)) { 398 usbTethered = true; 399 } else if (isWifi((String)iface)) { 400 wifiTethered = true; 401 } else if (isBluetooth((String)iface)) { 402 bluetoothTethered = true; 403 } 404 activeList.add((String)iface); 405 } 406 } 407 } 408 } 409 Intent broadcast = new Intent(ConnectivityManager.ACTION_TETHER_STATE_CHANGED); 410 broadcast.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 411 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 412 broadcast.putStringArrayListExtra(ConnectivityManager.EXTRA_AVAILABLE_TETHER, 413 availableList); 414 broadcast.putStringArrayListExtra(ConnectivityManager.EXTRA_ACTIVE_TETHER, activeList); 415 broadcast.putStringArrayListExtra(ConnectivityManager.EXTRA_ERRORED_TETHER, 416 erroredList); 417 mContext.sendStickyBroadcast(broadcast); 418 if (DBG) { 419 Log.d(TAG, "sendTetherStateChangedBroadcast " + availableList.size() + ", " + 420 activeList.size() + ", " + erroredList.size()); 421 } 422 423 if (usbTethered) { 424 if (wifiTethered || bluetoothTethered) { 425 showTetheredNotification(com.android.internal.R.drawable.stat_sys_tether_general); 426 } else { 427 showTetheredNotification(com.android.internal.R.drawable.stat_sys_tether_usb); 428 } 429 } else if (wifiTethered) { 430 if (bluetoothTethered) { 431 showTetheredNotification(com.android.internal.R.drawable.stat_sys_tether_general); 432 } else { 433 showTetheredNotification(com.android.internal.R.drawable.stat_sys_tether_wifi); 434 } 435 } else if (bluetoothTethered) { 436 showTetheredNotification(com.android.internal.R.drawable.stat_sys_tether_bluetooth); 437 } else { 438 clearTetheredNotification(); 439 } 440 } 441 442 private void showTetheredNotification(int icon) { 443 NotificationManager notificationManager = 444 (NotificationManager)mContext.getSystemService(Context.NOTIFICATION_SERVICE); 445 if (notificationManager == null) { 446 return; 447 } 448 449 if (mTetheredNotification != null) { 450 if (mTetheredNotification.icon == icon) { 451 return; 452 } 453 notificationManager.cancel(mTetheredNotification.icon); 454 } 455 456 Intent intent = new Intent(); 457 intent.setClassName("com.android.settings", "com.android.settings.TetherSettings"); 458 intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY); 459 460 PendingIntent pi = PendingIntent.getActivity(mContext, 0, intent, 0); 461 462 Resources r = Resources.getSystem(); 463 CharSequence title = r.getText(com.android.internal.R.string.tethered_notification_title); 464 CharSequence message = r.getText(com.android.internal.R.string. 465 tethered_notification_message); 466 467 if (mTetheredNotification == null) { 468 mTetheredNotification = new Notification(); 469 mTetheredNotification.when = 0; 470 } 471 mTetheredNotification.icon = icon; 472 mTetheredNotification.defaults &= ~Notification.DEFAULT_SOUND; 473 mTetheredNotification.flags = Notification.FLAG_ONGOING_EVENT; 474 mTetheredNotification.tickerText = title; 475 mTetheredNotification.setLatestEventInfo(mContext, title, message, pi); 476 477 notificationManager.notify(mTetheredNotification.icon, mTetheredNotification); 478 } 479 480 private void clearTetheredNotification() { 481 NotificationManager notificationManager = 482 (NotificationManager)mContext.getSystemService(Context.NOTIFICATION_SERVICE); 483 if (notificationManager != null && mTetheredNotification != null) { 484 notificationManager.cancel(mTetheredNotification.icon); 485 mTetheredNotification = null; 486 } 487 } 488 489 private class StateReceiver extends BroadcastReceiver { 490 public void onReceive(Context content, Intent intent) { 491 String action = intent.getAction(); 492 if (action.equals(UsbManager.ACTION_USB_STATE)) { 493 synchronized (Tethering.this.mPublicSync) { 494 boolean usbConnected = intent.getBooleanExtra(UsbManager.USB_CONNECTED, false); 495 mRndisEnabled = intent.getBooleanExtra(UsbManager.USB_FUNCTION_RNDIS, false); 496 // start tethering if we have a request pending 497 if (usbConnected && mRndisEnabled && mUsbTetherRequested) { 498 tetherUsb(true); 499 } 500 mUsbTetherRequested = false; 501 } 502 } else if (action.equals(ConnectivityManager.CONNECTIVITY_ACTION)) { 503 if (VDBG) Log.d(TAG, "Tethering got CONNECTIVITY_ACTION"); 504 mTetherMasterSM.sendMessage(TetherMasterSM.CMD_UPSTREAM_CHANGED); 505 } 506 } 507 } 508 509 private void tetherUsb(boolean enable) { 510 if (VDBG) Log.d(TAG, "tetherUsb " + enable); 511 512 String[] ifaces = new String[0]; 513 try { 514 ifaces = mNMService.listInterfaces(); 515 } catch (Exception e) { 516 Log.e(TAG, "Error listing Interfaces", e); 517 return; 518 } 519 for (String iface : ifaces) { 520 if (isUsb(iface)) { 521 int result = (enable ? tether(iface) : untether(iface)); 522 if (result == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 523 return; 524 } 525 } 526 } 527 Log.e(TAG, "unable start or stop USB tethering"); 528 } 529 530 // configured when we start tethering and unconfig'd on error or conclusion 531 private boolean configureUsbIface(boolean enabled) { 532 if (VDBG) Log.d(TAG, "configureUsbIface(" + enabled + ")"); 533 534 // toggle the USB interfaces 535 String[] ifaces = new String[0]; 536 try { 537 ifaces = mNMService.listInterfaces(); 538 } catch (Exception e) { 539 Log.e(TAG, "Error listing Interfaces", e); 540 return false; 541 } 542 for (String iface : ifaces) { 543 if (isUsb(iface)) { 544 InterfaceConfiguration ifcg = null; 545 try { 546 ifcg = mNMService.getInterfaceConfig(iface); 547 if (ifcg != null) { 548 InetAddress addr = NetworkUtils.numericToInetAddress(USB_NEAR_IFACE_ADDR); 549 ifcg.addr = new LinkAddress(addr, USB_PREFIX_LENGTH); 550 if (enabled) { 551 ifcg.interfaceFlags = ifcg.interfaceFlags.replace("down", "up"); 552 } else { 553 ifcg.interfaceFlags = ifcg.interfaceFlags.replace("up", "down"); 554 } 555 ifcg.interfaceFlags = ifcg.interfaceFlags.replace("running", ""); 556 ifcg.interfaceFlags = ifcg.interfaceFlags.replace(" "," "); 557 mNMService.setInterfaceConfig(iface, ifcg); 558 } 559 } catch (Exception e) { 560 Log.e(TAG, "Error configuring interface " + iface, e); 561 return false; 562 } 563 } 564 } 565 566 return true; 567 } 568 569 // TODO - return copies so people can't tamper 570 public String[] getTetherableUsbRegexs() { 571 return mTetherableUsbRegexs; 572 } 573 574 public String[] getTetherableWifiRegexs() { 575 return mTetherableWifiRegexs; 576 } 577 578 public String[] getTetherableBluetoothRegexs() { 579 return mTetherableBluetoothRegexs; 580 } 581 582 public int setUsbTethering(boolean enable) { 583 if (VDBG) Log.d(TAG, "setUsbTethering(" + enable + ")"); 584 UsbManager usbManager = (UsbManager)mContext.getSystemService(Context.USB_SERVICE); 585 586 synchronized (mPublicSync) { 587 if (enable) { 588 if (mRndisEnabled) { 589 tetherUsb(true); 590 } else { 591 mUsbTetherRequested = true; 592 usbManager.setCurrentFunction(UsbManager.USB_FUNCTION_RNDIS, false); 593 } 594 } else { 595 tetherUsb(false); 596 if (mRndisEnabled) { 597 usbManager.setCurrentFunction(null, false); 598 } 599 mUsbTetherRequested = false; 600 } 601 } 602 return ConnectivityManager.TETHER_ERROR_NO_ERROR; 603 } 604 605 public int[] getUpstreamIfaceTypes() { 606 int values[]; 607 synchronized (mPublicSync) { 608 updateConfiguration(); 609 values = new int[mUpstreamIfaceTypes.size()]; 610 Iterator<Integer> iterator = mUpstreamIfaceTypes.iterator(); 611 for (int i=0; i < mUpstreamIfaceTypes.size(); i++) { 612 values[i] = iterator.next(); 613 } 614 } 615 return values; 616 } 617 618 public void checkDunRequired() { 619 int secureSetting = Settings.Secure.getInt(mContext.getContentResolver(), 620 Settings.Secure.TETHER_DUN_REQUIRED, 2); 621 synchronized (mPublicSync) { 622 // 2 = not set, 0 = DUN not required, 1 = DUN required 623 if (secureSetting != 2) { 624 int requiredApn = (secureSetting == 1 ? 625 ConnectivityManager.TYPE_MOBILE_DUN : 626 ConnectivityManager.TYPE_MOBILE_HIPRI); 627 if (requiredApn == ConnectivityManager.TYPE_MOBILE_DUN) { 628 while (mUpstreamIfaceTypes.contains(MOBILE_TYPE)) { 629 mUpstreamIfaceTypes.remove(MOBILE_TYPE); 630 } 631 while (mUpstreamIfaceTypes.contains(HIPRI_TYPE)) { 632 mUpstreamIfaceTypes.remove(HIPRI_TYPE); 633 } 634 if (mUpstreamIfaceTypes.contains(DUN_TYPE) == false) { 635 mUpstreamIfaceTypes.add(DUN_TYPE); 636 } 637 } else { 638 while (mUpstreamIfaceTypes.contains(DUN_TYPE)) { 639 mUpstreamIfaceTypes.remove(DUN_TYPE); 640 } 641 if (mUpstreamIfaceTypes.contains(MOBILE_TYPE) == false) { 642 mUpstreamIfaceTypes.add(MOBILE_TYPE); 643 } 644 if (mUpstreamIfaceTypes.contains(HIPRI_TYPE) == false) { 645 mUpstreamIfaceTypes.add(HIPRI_TYPE); 646 } 647 } 648 } 649 if (mUpstreamIfaceTypes.contains(DUN_TYPE)) { 650 mPreferredUpstreamMobileApn = ConnectivityManager.TYPE_MOBILE_DUN; 651 } else { 652 mPreferredUpstreamMobileApn = ConnectivityManager.TYPE_MOBILE_HIPRI; 653 } 654 } 655 } 656 657 // TODO review API - maybe return ArrayList<String> here and below? 658 public String[] getTetheredIfaces() { 659 ArrayList<String> list = new ArrayList<String>(); 660 synchronized (mPublicSync) { 661 Set keys = mIfaces.keySet(); 662 for (Object key : keys) { 663 TetherInterfaceSM sm = mIfaces.get(key); 664 if (sm.isTethered()) { 665 list.add((String)key); 666 } 667 } 668 } 669 String[] retVal = new String[list.size()]; 670 for (int i=0; i < list.size(); i++) { 671 retVal[i] = list.get(i); 672 } 673 return retVal; 674 } 675 676 public String[] getTetheredIfacePairs() { 677 final ArrayList<String> list = Lists.newArrayList(); 678 synchronized (mPublicSync) { 679 for (TetherInterfaceSM sm : mIfaces.values()) { 680 if (sm.isTethered()) { 681 list.add(sm.mMyUpstreamIfaceName); 682 list.add(sm.mIfaceName); 683 } 684 } 685 } 686 return list.toArray(new String[list.size()]); 687 } 688 689 public String[] getTetherableIfaces() { 690 ArrayList<String> list = new ArrayList<String>(); 691 synchronized (mPublicSync) { 692 Set keys = mIfaces.keySet(); 693 for (Object key : keys) { 694 TetherInterfaceSM sm = mIfaces.get(key); 695 if (sm.isAvailable()) { 696 list.add((String)key); 697 } 698 } 699 } 700 String[] retVal = new String[list.size()]; 701 for (int i=0; i < list.size(); i++) { 702 retVal[i] = list.get(i); 703 } 704 return retVal; 705 } 706 707 public String[] getErroredIfaces() { 708 ArrayList<String> list = new ArrayList<String>(); 709 synchronized (mPublicSync) { 710 Set keys = mIfaces.keySet(); 711 for (Object key : keys) { 712 TetherInterfaceSM sm = mIfaces.get(key); 713 if (sm.isErrored()) { 714 list.add((String)key); 715 } 716 } 717 } 718 String[] retVal = new String[list.size()]; 719 for (int i= 0; i< list.size(); i++) { 720 retVal[i] = list.get(i); 721 } 722 return retVal; 723 } 724 725 //TODO: Temporary handling upstream change triggered without 726 // CONNECTIVITY_ACTION. Only to accomodate interface 727 // switch during HO. 728 // @see bug/4455071 729 public void handleTetherIfaceChange() { 730 mTetherMasterSM.sendMessage(TetherMasterSM.CMD_UPSTREAM_CHANGED); 731 } 732 733 class TetherInterfaceSM extends StateMachine { 734 // notification from the master SM that it's not in tether mode 735 static final int CMD_TETHER_MODE_DEAD = 1; 736 // request from the user that it wants to tether 737 static final int CMD_TETHER_REQUESTED = 2; 738 // request from the user that it wants to untether 739 static final int CMD_TETHER_UNREQUESTED = 3; 740 // notification that this interface is down 741 static final int CMD_INTERFACE_DOWN = 4; 742 // notification that this interface is up 743 static final int CMD_INTERFACE_UP = 5; 744 // notification from the master SM that it had an error turning on cellular dun 745 static final int CMD_CELL_DUN_ERROR = 6; 746 // notification from the master SM that it had trouble enabling IP Forwarding 747 static final int CMD_IP_FORWARDING_ENABLE_ERROR = 7; 748 // notification from the master SM that it had trouble disabling IP Forwarding 749 static final int CMD_IP_FORWARDING_DISABLE_ERROR = 8; 750 // notification from the master SM that it had trouble staring tethering 751 static final int CMD_START_TETHERING_ERROR = 9; 752 // notification from the master SM that it had trouble stopping tethering 753 static final int CMD_STOP_TETHERING_ERROR = 10; 754 // notification from the master SM that it had trouble setting the DNS forwarders 755 static final int CMD_SET_DNS_FORWARDERS_ERROR = 11; 756 // the upstream connection has changed 757 static final int CMD_TETHER_CONNECTION_CHANGED = 12; 758 759 private State mDefaultState; 760 761 private State mInitialState; 762 private State mStartingState; 763 private State mTetheredState; 764 765 private State mUnavailableState; 766 767 private boolean mAvailable; 768 private boolean mTethered; 769 int mLastError; 770 771 String mIfaceName; 772 String mMyUpstreamIfaceName; // may change over time 773 774 boolean mUsb; 775 776 TetherInterfaceSM(String name, Looper looper, boolean usb) { 777 super(name, looper); 778 mIfaceName = name; 779 mUsb = usb; 780 setLastError(ConnectivityManager.TETHER_ERROR_NO_ERROR); 781 782 mInitialState = new InitialState(); 783 addState(mInitialState); 784 mStartingState = new StartingState(); 785 addState(mStartingState); 786 mTetheredState = new TetheredState(); 787 addState(mTetheredState); 788 mUnavailableState = new UnavailableState(); 789 addState(mUnavailableState); 790 791 setInitialState(mInitialState); 792 } 793 794 public String toString() { 795 String res = new String(); 796 res += mIfaceName + " - "; 797 IState current = getCurrentState(); 798 if (current == mInitialState) res += "InitialState"; 799 if (current == mStartingState) res += "StartingState"; 800 if (current == mTetheredState) res += "TetheredState"; 801 if (current == mUnavailableState) res += "UnavailableState"; 802 if (mAvailable) res += " - Available"; 803 if (mTethered) res += " - Tethered"; 804 res += " - lastError =" + mLastError; 805 return res; 806 } 807 808 public int getLastError() { 809 synchronized (Tethering.this.mPublicSync) { 810 return mLastError; 811 } 812 } 813 814 private void setLastError(int error) { 815 synchronized (Tethering.this.mPublicSync) { 816 mLastError = error; 817 818 if (isErrored()) { 819 if (mUsb) { 820 // note everything's been unwound by this point so nothing to do on 821 // further error.. 822 Tethering.this.configureUsbIface(false); 823 } 824 } 825 } 826 } 827 828 public boolean isAvailable() { 829 synchronized (Tethering.this.mPublicSync) { 830 return mAvailable; 831 } 832 } 833 834 private void setAvailable(boolean available) { 835 synchronized (Tethering.this.mPublicSync) { 836 mAvailable = available; 837 } 838 } 839 840 public boolean isTethered() { 841 synchronized (Tethering.this.mPublicSync) { 842 return mTethered; 843 } 844 } 845 846 private void setTethered(boolean tethered) { 847 synchronized (Tethering.this.mPublicSync) { 848 mTethered = tethered; 849 } 850 } 851 852 public boolean isErrored() { 853 synchronized (Tethering.this.mPublicSync) { 854 return (mLastError != ConnectivityManager.TETHER_ERROR_NO_ERROR); 855 } 856 } 857 858 class InitialState extends State { 859 @Override 860 public void enter() { 861 setAvailable(true); 862 setTethered(false); 863 sendTetherStateChangedBroadcast(); 864 } 865 866 @Override 867 public boolean processMessage(Message message) { 868 if (DBG) Log.d(TAG, "InitialState.processMessage what=" + message.what); 869 boolean retValue = true; 870 switch (message.what) { 871 case CMD_TETHER_REQUESTED: 872 setLastError(ConnectivityManager.TETHER_ERROR_NO_ERROR); 873 mTetherMasterSM.sendMessage(TetherMasterSM.CMD_TETHER_MODE_REQUESTED, 874 TetherInterfaceSM.this); 875 transitionTo(mStartingState); 876 break; 877 case CMD_INTERFACE_DOWN: 878 transitionTo(mUnavailableState); 879 break; 880 default: 881 retValue = false; 882 break; 883 } 884 return retValue; 885 } 886 } 887 888 class StartingState extends State { 889 @Override 890 public void enter() { 891 setAvailable(false); 892 if (mUsb) { 893 if (!Tethering.this.configureUsbIface(true)) { 894 mTetherMasterSM.sendMessage(TetherMasterSM.CMD_TETHER_MODE_UNREQUESTED, 895 TetherInterfaceSM.this); 896 setLastError(ConnectivityManager.TETHER_ERROR_IFACE_CFG_ERROR); 897 898 transitionTo(mInitialState); 899 return; 900 } 901 } 902 sendTetherStateChangedBroadcast(); 903 904 // Skipping StartingState 905 transitionTo(mTetheredState); 906 } 907 @Override 908 public boolean processMessage(Message message) { 909 if (DBG) Log.d(TAG, "StartingState.processMessage what=" + message.what); 910 boolean retValue = true; 911 switch (message.what) { 912 // maybe a parent class? 913 case CMD_TETHER_UNREQUESTED: 914 mTetherMasterSM.sendMessage(TetherMasterSM.CMD_TETHER_MODE_UNREQUESTED, 915 TetherInterfaceSM.this); 916 if (mUsb) { 917 if (!Tethering.this.configureUsbIface(false)) { 918 setLastErrorAndTransitionToInitialState( 919 ConnectivityManager.TETHER_ERROR_IFACE_CFG_ERROR); 920 break; 921 } 922 } 923 transitionTo(mInitialState); 924 break; 925 case CMD_CELL_DUN_ERROR: 926 case CMD_IP_FORWARDING_ENABLE_ERROR: 927 case CMD_IP_FORWARDING_DISABLE_ERROR: 928 case CMD_START_TETHERING_ERROR: 929 case CMD_STOP_TETHERING_ERROR: 930 case CMD_SET_DNS_FORWARDERS_ERROR: 931 setLastErrorAndTransitionToInitialState( 932 ConnectivityManager.TETHER_ERROR_MASTER_ERROR); 933 break; 934 case CMD_INTERFACE_DOWN: 935 mTetherMasterSM.sendMessage(TetherMasterSM.CMD_TETHER_MODE_UNREQUESTED, 936 TetherInterfaceSM.this); 937 transitionTo(mUnavailableState); 938 break; 939 default: 940 retValue = false; 941 } 942 return retValue; 943 } 944 } 945 946 class TetheredState extends State { 947 @Override 948 public void enter() { 949 try { 950 mNMService.tetherInterface(mIfaceName); 951 } catch (Exception e) { 952 Log.e(TAG, "Error Tethering: " + e.toString()); 953 setLastError(ConnectivityManager.TETHER_ERROR_TETHER_IFACE_ERROR); 954 955 transitionTo(mInitialState); 956 return; 957 } 958 if (DBG) Log.d(TAG, "Tethered " + mIfaceName); 959 setAvailable(false); 960 setTethered(true); 961 sendTetherStateChangedBroadcast(); 962 } 963 964 private void cleanupUpstream() { 965 if (mMyUpstreamIfaceName != null) { 966 // note that we don't care about errors here. 967 // sometimes interfaces are gone before we get 968 // to remove their rules, which generates errors. 969 // just do the best we can. 970 try { 971 // about to tear down NAT; gather remaining statistics 972 mStatsService.forceUpdate(); 973 } catch (Exception e) { 974 if (VDBG) Log.e(TAG, "Exception in forceUpdate: " + e.toString()); 975 } 976 try { 977 mNMService.disableNat(mIfaceName, mMyUpstreamIfaceName); 978 } catch (Exception e) { 979 if (VDBG) Log.e(TAG, "Exception in disableNat: " + e.toString()); 980 } 981 mMyUpstreamIfaceName = null; 982 } 983 return; 984 } 985 986 @Override 987 public boolean processMessage(Message message) { 988 if (DBG) Log.d(TAG, "TetheredState.processMessage what=" + message.what); 989 boolean retValue = true; 990 boolean error = false; 991 switch (message.what) { 992 case CMD_TETHER_UNREQUESTED: 993 case CMD_INTERFACE_DOWN: 994 cleanupUpstream(); 995 try { 996 mNMService.untetherInterface(mIfaceName); 997 } catch (Exception e) { 998 setLastErrorAndTransitionToInitialState( 999 ConnectivityManager.TETHER_ERROR_UNTETHER_IFACE_ERROR); 1000 break; 1001 } 1002 mTetherMasterSM.sendMessage(TetherMasterSM.CMD_TETHER_MODE_UNREQUESTED, 1003 TetherInterfaceSM.this); 1004 if (message.what == CMD_TETHER_UNREQUESTED) { 1005 if (mUsb) { 1006 if (!Tethering.this.configureUsbIface(false)) { 1007 setLastError( 1008 ConnectivityManager.TETHER_ERROR_IFACE_CFG_ERROR); 1009 } 1010 } 1011 transitionTo(mInitialState); 1012 } else if (message.what == CMD_INTERFACE_DOWN) { 1013 transitionTo(mUnavailableState); 1014 } 1015 if (DBG) Log.d(TAG, "Untethered " + mIfaceName); 1016 break; 1017 case CMD_TETHER_CONNECTION_CHANGED: 1018 String newUpstreamIfaceName = (String)(message.obj); 1019 if ((mMyUpstreamIfaceName == null && newUpstreamIfaceName == null) || 1020 (mMyUpstreamIfaceName != null && 1021 mMyUpstreamIfaceName.equals(newUpstreamIfaceName))) { 1022 if (VDBG) Log.d(TAG, "Connection changed noop - dropping"); 1023 break; 1024 } 1025 cleanupUpstream(); 1026 if (newUpstreamIfaceName != null) { 1027 try { 1028 mNMService.enableNat(mIfaceName, newUpstreamIfaceName); 1029 } catch (Exception e) { 1030 Log.e(TAG, "Exception enabling Nat: " + e.toString()); 1031 try { 1032 mNMService.untetherInterface(mIfaceName); 1033 } catch (Exception ee) {} 1034 1035 setLastError(ConnectivityManager.TETHER_ERROR_ENABLE_NAT_ERROR); 1036 transitionTo(mInitialState); 1037 return true; 1038 } 1039 } 1040 mMyUpstreamIfaceName = newUpstreamIfaceName; 1041 break; 1042 case CMD_CELL_DUN_ERROR: 1043 case CMD_IP_FORWARDING_ENABLE_ERROR: 1044 case CMD_IP_FORWARDING_DISABLE_ERROR: 1045 case CMD_START_TETHERING_ERROR: 1046 case CMD_STOP_TETHERING_ERROR: 1047 case CMD_SET_DNS_FORWARDERS_ERROR: 1048 error = true; 1049 // fall through 1050 case CMD_TETHER_MODE_DEAD: 1051 cleanupUpstream(); 1052 try { 1053 mNMService.untetherInterface(mIfaceName); 1054 } catch (Exception e) { 1055 setLastErrorAndTransitionToInitialState( 1056 ConnectivityManager.TETHER_ERROR_UNTETHER_IFACE_ERROR); 1057 break; 1058 } 1059 if (error) { 1060 setLastErrorAndTransitionToInitialState( 1061 ConnectivityManager.TETHER_ERROR_MASTER_ERROR); 1062 break; 1063 } 1064 if (DBG) Log.d(TAG, "Tether lost upstream connection " + mIfaceName); 1065 sendTetherStateChangedBroadcast(); 1066 if (mUsb) { 1067 if (!Tethering.this.configureUsbIface(false)) { 1068 setLastError(ConnectivityManager.TETHER_ERROR_IFACE_CFG_ERROR); 1069 } 1070 } 1071 transitionTo(mInitialState); 1072 break; 1073 default: 1074 retValue = false; 1075 break; 1076 } 1077 return retValue; 1078 } 1079 } 1080 1081 class UnavailableState extends State { 1082 @Override 1083 public void enter() { 1084 setAvailable(false); 1085 setLastError(ConnectivityManager.TETHER_ERROR_NO_ERROR); 1086 setTethered(false); 1087 sendTetherStateChangedBroadcast(); 1088 } 1089 @Override 1090 public boolean processMessage(Message message) { 1091 boolean retValue = true; 1092 switch (message.what) { 1093 case CMD_INTERFACE_UP: 1094 transitionTo(mInitialState); 1095 break; 1096 default: 1097 retValue = false; 1098 break; 1099 } 1100 return retValue; 1101 } 1102 } 1103 1104 void setLastErrorAndTransitionToInitialState(int error) { 1105 setLastError(error); 1106 transitionTo(mInitialState); 1107 } 1108 1109 } 1110 1111 class TetherMasterSM extends StateMachine { 1112 // an interface SM has requested Tethering 1113 static final int CMD_TETHER_MODE_REQUESTED = 1; 1114 // an interface SM has unrequested Tethering 1115 static final int CMD_TETHER_MODE_UNREQUESTED = 2; 1116 // upstream connection change - do the right thing 1117 static final int CMD_UPSTREAM_CHANGED = 3; 1118 // we received notice that the cellular DUN connection is up 1119 static final int CMD_CELL_CONNECTION_RENEW = 4; 1120 // we don't have a valid upstream conn, check again after a delay 1121 static final int CMD_RETRY_UPSTREAM = 5; 1122 1123 // This indicates what a timeout event relates to. A state that 1124 // sends itself a delayed timeout event and handles incoming timeout events 1125 // should inc this when it is entered and whenever it sends a new timeout event. 1126 // We do not flush the old ones. 1127 private int mSequenceNumber; 1128 1129 private State mInitialState; 1130 private State mTetherModeAliveState; 1131 1132 private State mSetIpForwardingEnabledErrorState; 1133 private State mSetIpForwardingDisabledErrorState; 1134 private State mStartTetheringErrorState; 1135 private State mStopTetheringErrorState; 1136 private State mSetDnsForwardersErrorState; 1137 1138 private ArrayList mNotifyList; 1139 1140 private int mCurrentConnectionSequence; 1141 private int mMobileApnReserved = ConnectivityManager.TYPE_NONE; 1142 1143 private String mUpstreamIfaceName = null; 1144 1145 private static final int UPSTREAM_SETTLE_TIME_MS = 10000; 1146 private static final int CELL_CONNECTION_RENEW_MS = 40000; 1147 1148 TetherMasterSM(String name, Looper looper) { 1149 super(name, looper); 1150 1151 //Add states 1152 mInitialState = new InitialState(); 1153 addState(mInitialState); 1154 mTetherModeAliveState = new TetherModeAliveState(); 1155 addState(mTetherModeAliveState); 1156 1157 mSetIpForwardingEnabledErrorState = new SetIpForwardingEnabledErrorState(); 1158 addState(mSetIpForwardingEnabledErrorState); 1159 mSetIpForwardingDisabledErrorState = new SetIpForwardingDisabledErrorState(); 1160 addState(mSetIpForwardingDisabledErrorState); 1161 mStartTetheringErrorState = new StartTetheringErrorState(); 1162 addState(mStartTetheringErrorState); 1163 mStopTetheringErrorState = new StopTetheringErrorState(); 1164 addState(mStopTetheringErrorState); 1165 mSetDnsForwardersErrorState = new SetDnsForwardersErrorState(); 1166 addState(mSetDnsForwardersErrorState); 1167 1168 mNotifyList = new ArrayList(); 1169 setInitialState(mInitialState); 1170 } 1171 1172 class TetherMasterUtilState extends State { 1173 protected final static boolean TRY_TO_SETUP_MOBILE_CONNECTION = true; 1174 protected final static boolean WAIT_FOR_NETWORK_TO_SETTLE = false; 1175 1176 @Override 1177 public boolean processMessage(Message m) { 1178 return false; 1179 } 1180 protected String enableString(int apnType) { 1181 switch (apnType) { 1182 case ConnectivityManager.TYPE_MOBILE_DUN: 1183 return Phone.FEATURE_ENABLE_DUN_ALWAYS; 1184 case ConnectivityManager.TYPE_MOBILE: 1185 case ConnectivityManager.TYPE_MOBILE_HIPRI: 1186 return Phone.FEATURE_ENABLE_HIPRI; 1187 } 1188 return null; 1189 } 1190 protected boolean turnOnUpstreamMobileConnection(int apnType) { 1191 boolean retValue = true; 1192 if (apnType == ConnectivityManager.TYPE_NONE) return false; 1193 if (apnType != mMobileApnReserved) turnOffUpstreamMobileConnection(); 1194 int result = Phone.APN_REQUEST_FAILED; 1195 String enableString = enableString(apnType); 1196 if (enableString == null) return false; 1197 try { 1198 result = mConnService.startUsingNetworkFeature(ConnectivityManager.TYPE_MOBILE, 1199 enableString, new Binder()); 1200 } catch (Exception e) { 1201 } 1202 switch (result) { 1203 case Phone.APN_ALREADY_ACTIVE: 1204 case Phone.APN_REQUEST_STARTED: 1205 mMobileApnReserved = apnType; 1206 Message m = obtainMessage(CMD_CELL_CONNECTION_RENEW); 1207 m.arg1 = ++mCurrentConnectionSequence; 1208 sendMessageDelayed(m, CELL_CONNECTION_RENEW_MS); 1209 break; 1210 case Phone.APN_REQUEST_FAILED: 1211 default: 1212 retValue = false; 1213 break; 1214 } 1215 1216 return retValue; 1217 } 1218 protected boolean turnOffUpstreamMobileConnection() { 1219 if (mMobileApnReserved != ConnectivityManager.TYPE_NONE) { 1220 try { 1221 mConnService.stopUsingNetworkFeature(ConnectivityManager.TYPE_MOBILE, 1222 enableString(mMobileApnReserved)); 1223 } catch (Exception e) { 1224 return false; 1225 } 1226 mMobileApnReserved = ConnectivityManager.TYPE_NONE; 1227 } 1228 return true; 1229 } 1230 protected boolean turnOnMasterTetherSettings() { 1231 try { 1232 mNMService.setIpForwardingEnabled(true); 1233 } catch (Exception e) { 1234 transitionTo(mSetIpForwardingEnabledErrorState); 1235 return false; 1236 } 1237 try { 1238 mNMService.startTethering(mDhcpRange); 1239 } catch (Exception e) { 1240 try { 1241 mNMService.stopTethering(); 1242 mNMService.startTethering(mDhcpRange); 1243 } catch (Exception ee) { 1244 transitionTo(mStartTetheringErrorState); 1245 return false; 1246 } 1247 } 1248 try { 1249 mNMService.setDnsForwarders(mDefaultDnsServers); 1250 } catch (Exception e) { 1251 transitionTo(mSetDnsForwardersErrorState); 1252 return false; 1253 } 1254 return true; 1255 } 1256 protected boolean turnOffMasterTetherSettings() { 1257 try { 1258 mNMService.stopTethering(); 1259 } catch (Exception e) { 1260 transitionTo(mStopTetheringErrorState); 1261 return false; 1262 } 1263 try { 1264 mNMService.setIpForwardingEnabled(false); 1265 } catch (Exception e) { 1266 transitionTo(mSetIpForwardingDisabledErrorState); 1267 return false; 1268 } 1269 transitionTo(mInitialState); 1270 return true; 1271 } 1272 1273 protected void chooseUpstreamType(boolean tryCell) { 1274 int upType = ConnectivityManager.TYPE_NONE; 1275 String iface = null; 1276 1277 updateConfiguration(); 1278 1279 synchronized (mPublicSync) { 1280 if (VDBG) { 1281 Log.d(TAG, "chooseUpstreamType has upstream iface types:"); 1282 for (Integer netType : mUpstreamIfaceTypes) { 1283 Log.d(TAG, " " + netType); 1284 } 1285 } 1286 1287 for (Integer netType : mUpstreamIfaceTypes) { 1288 NetworkInfo info = null; 1289 try { 1290 info = mConnService.getNetworkInfo(netType.intValue()); 1291 } catch (RemoteException e) { } 1292 if ((info != null) && info.isConnected()) { 1293 upType = netType.intValue(); 1294 break; 1295 } 1296 } 1297 } 1298 1299 if (DBG) { 1300 Log.d(TAG, "chooseUpstreamType(" + tryCell + "), preferredApn =" 1301 + mPreferredUpstreamMobileApn + ", got type=" + upType); 1302 } 1303 1304 // if we're on DUN, put our own grab on it 1305 if (upType == ConnectivityManager.TYPE_MOBILE_DUN || 1306 upType == ConnectivityManager.TYPE_MOBILE_HIPRI) { 1307 turnOnUpstreamMobileConnection(upType); 1308 } 1309 1310 if (upType == ConnectivityManager.TYPE_NONE) { 1311 boolean tryAgainLater = true; 1312 if ((tryCell == TRY_TO_SETUP_MOBILE_CONNECTION) && 1313 (turnOnUpstreamMobileConnection(mPreferredUpstreamMobileApn) == true)) { 1314 // we think mobile should be coming up - don't set a retry 1315 tryAgainLater = false; 1316 } 1317 if (tryAgainLater) { 1318 sendMessageDelayed(CMD_RETRY_UPSTREAM, UPSTREAM_SETTLE_TIME_MS); 1319 } 1320 } else { 1321 LinkProperties linkProperties = null; 1322 try { 1323 linkProperties = mConnService.getLinkProperties(upType); 1324 } catch (RemoteException e) { } 1325 if (linkProperties != null) { 1326 iface = linkProperties.getInterfaceName(); 1327 String[] dnsServers = mDefaultDnsServers; 1328 Collection<InetAddress> dnses = linkProperties.getDnses(); 1329 if (dnses != null) { 1330 // we currently only handle IPv4 1331 ArrayList<InetAddress> v4Dnses = 1332 new ArrayList<InetAddress>(dnses.size()); 1333 for (InetAddress dnsAddress : dnses) { 1334 if (dnsAddress instanceof Inet4Address) { 1335 v4Dnses.add(dnsAddress); 1336 } 1337 } 1338 if (v4Dnses.size() > 0) { 1339 dnsServers = NetworkUtils.makeStrings(v4Dnses); 1340 } 1341 } 1342 try { 1343 mNMService.setDnsForwarders(dnsServers); 1344 } catch (Exception e) { 1345 transitionTo(mSetDnsForwardersErrorState); 1346 } 1347 } 1348 } 1349 notifyTetheredOfNewUpstreamIface(iface); 1350 } 1351 1352 protected void notifyTetheredOfNewUpstreamIface(String ifaceName) { 1353 if (DBG) Log.d(TAG, "notifying tethered with iface =" + ifaceName); 1354 mUpstreamIfaceName = ifaceName; 1355 for (Object o : mNotifyList) { 1356 TetherInterfaceSM sm = (TetherInterfaceSM)o; 1357 sm.sendMessage(TetherInterfaceSM.CMD_TETHER_CONNECTION_CHANGED, 1358 ifaceName); 1359 } 1360 } 1361 } 1362 1363 class InitialState extends TetherMasterUtilState { 1364 @Override 1365 public void enter() { 1366 } 1367 @Override 1368 public boolean processMessage(Message message) { 1369 if (DBG) Log.d(TAG, "MasterInitialState.processMessage what=" + message.what); 1370 boolean retValue = true; 1371 switch (message.what) { 1372 case CMD_TETHER_MODE_REQUESTED: 1373 TetherInterfaceSM who = (TetherInterfaceSM)message.obj; 1374 if (VDBG) Log.d(TAG, "Tether Mode requested by " + who.toString()); 1375 mNotifyList.add(who); 1376 transitionTo(mTetherModeAliveState); 1377 break; 1378 case CMD_TETHER_MODE_UNREQUESTED: 1379 who = (TetherInterfaceSM)message.obj; 1380 if (VDBG) Log.d(TAG, "Tether Mode unrequested by " + who.toString()); 1381 int index = mNotifyList.indexOf(who); 1382 if (index != -1) { 1383 mNotifyList.remove(who); 1384 } 1385 break; 1386 default: 1387 retValue = false; 1388 break; 1389 } 1390 return retValue; 1391 } 1392 } 1393 1394 class TetherModeAliveState extends TetherMasterUtilState { 1395 boolean mTryCell = !WAIT_FOR_NETWORK_TO_SETTLE; 1396 @Override 1397 public void enter() { 1398 turnOnMasterTetherSettings(); // may transition us out 1399 1400 mTryCell = !WAIT_FOR_NETWORK_TO_SETTLE; // better try something first pass 1401 // or crazy tests cases will fail 1402 chooseUpstreamType(mTryCell); 1403 mTryCell = !mTryCell; 1404 } 1405 @Override 1406 public void exit() { 1407 turnOffUpstreamMobileConnection(); 1408 notifyTetheredOfNewUpstreamIface(null); 1409 } 1410 @Override 1411 public boolean processMessage(Message message) { 1412 if (DBG) Log.d(TAG, "TetherModeAliveState.processMessage what=" + message.what); 1413 boolean retValue = true; 1414 switch (message.what) { 1415 case CMD_TETHER_MODE_REQUESTED: 1416 TetherInterfaceSM who = (TetherInterfaceSM)message.obj; 1417 mNotifyList.add(who); 1418 who.sendMessage(TetherInterfaceSM.CMD_TETHER_CONNECTION_CHANGED, 1419 mUpstreamIfaceName); 1420 break; 1421 case CMD_TETHER_MODE_UNREQUESTED: 1422 who = (TetherInterfaceSM)message.obj; 1423 int index = mNotifyList.indexOf(who); 1424 if (index != -1) { 1425 mNotifyList.remove(index); 1426 if (mNotifyList.isEmpty()) { 1427 turnOffMasterTetherSettings(); // transitions appropriately 1428 } 1429 } 1430 break; 1431 case CMD_UPSTREAM_CHANGED: 1432 // need to try DUN immediately if Wifi goes down 1433 mTryCell = !WAIT_FOR_NETWORK_TO_SETTLE; 1434 chooseUpstreamType(mTryCell); 1435 mTryCell = !mTryCell; 1436 break; 1437 case CMD_CELL_CONNECTION_RENEW: 1438 // make sure we're still using a requested connection - may have found 1439 // wifi or something since then. 1440 if (mCurrentConnectionSequence == message.arg1) { 1441 if (VDBG) { 1442 Log.d(TAG, "renewing mobile connection - requeuing for another " + 1443 CELL_CONNECTION_RENEW_MS + "ms"); 1444 } 1445 turnOnUpstreamMobileConnection(mMobileApnReserved); 1446 } 1447 break; 1448 case CMD_RETRY_UPSTREAM: 1449 chooseUpstreamType(mTryCell); 1450 mTryCell = !mTryCell; 1451 break; 1452 default: 1453 retValue = false; 1454 break; 1455 } 1456 return retValue; 1457 } 1458 } 1459 1460 class ErrorState extends State { 1461 int mErrorNotification; 1462 @Override 1463 public boolean processMessage(Message message) { 1464 boolean retValue = true; 1465 switch (message.what) { 1466 case CMD_TETHER_MODE_REQUESTED: 1467 TetherInterfaceSM who = (TetherInterfaceSM)message.obj; 1468 who.sendMessage(mErrorNotification); 1469 break; 1470 default: 1471 retValue = false; 1472 } 1473 return retValue; 1474 } 1475 void notify(int msgType) { 1476 mErrorNotification = msgType; 1477 for (Object o : mNotifyList) { 1478 TetherInterfaceSM sm = (TetherInterfaceSM)o; 1479 sm.sendMessage(msgType); 1480 } 1481 } 1482 1483 } 1484 class SetIpForwardingEnabledErrorState extends ErrorState { 1485 @Override 1486 public void enter() { 1487 Log.e(TAG, "Error in setIpForwardingEnabled"); 1488 notify(TetherInterfaceSM.CMD_IP_FORWARDING_ENABLE_ERROR); 1489 } 1490 } 1491 1492 class SetIpForwardingDisabledErrorState extends ErrorState { 1493 @Override 1494 public void enter() { 1495 Log.e(TAG, "Error in setIpForwardingDisabled"); 1496 notify(TetherInterfaceSM.CMD_IP_FORWARDING_DISABLE_ERROR); 1497 } 1498 } 1499 1500 class StartTetheringErrorState extends ErrorState { 1501 @Override 1502 public void enter() { 1503 Log.e(TAG, "Error in startTethering"); 1504 notify(TetherInterfaceSM.CMD_START_TETHERING_ERROR); 1505 try { 1506 mNMService.setIpForwardingEnabled(false); 1507 } catch (Exception e) {} 1508 } 1509 } 1510 1511 class StopTetheringErrorState extends ErrorState { 1512 @Override 1513 public void enter() { 1514 Log.e(TAG, "Error in stopTethering"); 1515 notify(TetherInterfaceSM.CMD_STOP_TETHERING_ERROR); 1516 try { 1517 mNMService.setIpForwardingEnabled(false); 1518 } catch (Exception e) {} 1519 } 1520 } 1521 1522 class SetDnsForwardersErrorState extends ErrorState { 1523 @Override 1524 public void enter() { 1525 Log.e(TAG, "Error in setDnsForwarders"); 1526 notify(TetherInterfaceSM.CMD_SET_DNS_FORWARDERS_ERROR); 1527 try { 1528 mNMService.stopTethering(); 1529 } catch (Exception e) {} 1530 try { 1531 mNMService.setIpForwardingEnabled(false); 1532 } catch (Exception e) {} 1533 } 1534 } 1535 } 1536 1537 public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1538 if (mContext.checkCallingOrSelfPermission( 1539 android.Manifest.permission.DUMP) != PackageManager.PERMISSION_GRANTED) { 1540 pw.println("Permission Denial: can't dump ConnectivityService.Tether " + 1541 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1542 Binder.getCallingUid()); 1543 return; 1544 } 1545 1546 synchronized (mPublicSync) { 1547 pw.println("mUpstreamIfaceTypes: "); 1548 for (Integer netType : mUpstreamIfaceTypes) { 1549 pw.println(" " + netType); 1550 } 1551 1552 pw.println(); 1553 pw.println("Tether state:"); 1554 for (Object o : mIfaces.values()) { 1555 pw.println(" "+o.toString()); 1556 } 1557 } 1558 pw.println(); 1559 return; 1560 } 1561 } 1562
