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.net.RouteInfo; 39 import android.os.Binder; 40 import android.os.HandlerThread; 41 import android.os.IBinder; 42 import android.os.INetworkManagementService; 43 import android.os.Looper; 44 import android.os.Message; 45 import android.os.RemoteException; 46 import android.os.ServiceManager; 47 import android.os.UserHandle; 48 import android.provider.Settings; 49 import android.util.Log; 50 51 import com.android.internal.telephony.Phone; 52 import com.android.internal.telephony.PhoneConstants; 53 import com.android.internal.util.IState; 54 import com.android.internal.util.State; 55 import com.android.internal.util.StateMachine; 56 import com.google.android.collect.Lists; 57 58 import java.io.FileDescriptor; 59 import java.io.PrintWriter; 60 import java.net.InetAddress; 61 import java.net.Inet4Address; 62 import java.util.ArrayList; 63 import java.util.Collection; 64 import java.util.HashMap; 65 import java.util.Iterator; 66 import java.util.Set; 67 68 /** 69 * @hide 70 * 71 * Timeout 72 * 73 * TODO - look for parent classes and code sharing 74 */ 75 public class Tethering extends INetworkManagementEventObserver.Stub { 76 77 private Context mContext; 78 private final static String TAG = "Tethering"; 79 private final static boolean DBG = true; 80 private final static boolean VDBG = false; 81 82 // TODO - remove both of these - should be part of interface inspection/selection stuff 83 private String[] mTetherableUsbRegexs; 84 private String[] mTetherableWifiRegexs; 85 private String[] mTetherableBluetoothRegexs; 86 private Collection<Integer> mUpstreamIfaceTypes; 87 88 // used to synchronize public access to members 89 private Object mPublicSync; 90 91 private static final Integer MOBILE_TYPE = new Integer(ConnectivityManager.TYPE_MOBILE); 92 private static final Integer HIPRI_TYPE = new Integer(ConnectivityManager.TYPE_MOBILE_HIPRI); 93 private static final Integer DUN_TYPE = new Integer(ConnectivityManager.TYPE_MOBILE_DUN); 94 95 // if we have to connect to mobile, what APN type should we use? Calculated by examining the 96 // upstream type list and the DUN_REQUIRED secure-setting 97 private int mPreferredUpstreamMobileApn = ConnectivityManager.TYPE_NONE; 98 99 private final INetworkManagementService mNMService; 100 private final INetworkStatsService mStatsService; 101 private final IConnectivityManager mConnService; 102 private Looper mLooper; 103 private HandlerThread mThread; 104 105 private HashMap<String, TetherInterfaceSM> mIfaces; // all tethered/tetherable ifaces 106 107 private BroadcastReceiver mStateReceiver; 108 109 private static final String USB_NEAR_IFACE_ADDR = "192.168.42.129"; 110 private static final int USB_PREFIX_LENGTH = 24; 111 112 // USB is 192.168.42.1 and 255.255.255.0 113 // Wifi is 192.168.43.1 and 255.255.255.0 114 // BT is limited to max default of 5 connections. 192.168.44.1 to 192.168.48.1 115 // with 255.255.255.0 116 117 private String[] mDhcpRange; 118 private static final String[] DHCP_DEFAULT_RANGE = { 119 "192.168.42.2", "192.168.42.254", "192.168.43.2", "192.168.43.254", 120 "192.168.44.2", "192.168.44.254", "192.168.45.2", "192.168.45.254", 121 "192.168.46.2", "192.168.46.254", "192.168.47.2", "192.168.47.254", 122 "192.168.48.2", "192.168.48.254", 123 }; 124 125 private String[] mDefaultDnsServers; 126 private static final String DNS_DEFAULT_SERVER1 = "8.8.8.8"; 127 private static final String DNS_DEFAULT_SERVER2 = "8.8.4.4"; 128 129 private StateMachine mTetherMasterSM; 130 131 private Notification mTetheredNotification; 132 133 private boolean mRndisEnabled; // track the RNDIS function enabled state 134 private boolean mUsbTetherRequested; // true if USB tethering should be started 135 // when RNDIS is enabled 136 137 public Tethering(Context context, INetworkManagementService nmService, 138 INetworkStatsService statsService, IConnectivityManager connService, Looper looper) { 139 mContext = context; 140 mNMService = nmService; 141 mStatsService = statsService; 142 mConnService = connService; 143 mLooper = looper; 144 145 mPublicSync = new Object(); 146 147 mIfaces = new HashMap<String, TetherInterfaceSM>(); 148 149 // make our own thread so we don't anr the system 150 mThread = new HandlerThread("Tethering"); 151 mThread.start(); 152 mLooper = mThread.getLooper(); 153 mTetherMasterSM = new TetherMasterSM("TetherMaster", mLooper); 154 mTetherMasterSM.start(); 155 156 mStateReceiver = new StateReceiver(); 157 IntentFilter filter = new IntentFilter(); 158 filter.addAction(UsbManager.ACTION_USB_STATE); 159 filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION); 160 filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED); 161 mContext.registerReceiver(mStateReceiver, filter); 162 163 filter = new IntentFilter(); 164 filter.addAction(Intent.ACTION_MEDIA_SHARED); 165 filter.addAction(Intent.ACTION_MEDIA_UNSHARED); 166 filter.addDataScheme("file"); 167 mContext.registerReceiver(mStateReceiver, filter); 168 169 mDhcpRange = context.getResources().getStringArray( 170 com.android.internal.R.array.config_tether_dhcp_range); 171 if ((mDhcpRange.length == 0) || (mDhcpRange.length % 2 ==1)) { 172 mDhcpRange = DHCP_DEFAULT_RANGE; 173 } 174 175 // load device config info 176 updateConfiguration(); 177 178 // TODO - remove and rely on real notifications of the current iface 179 mDefaultDnsServers = new String[2]; 180 mDefaultDnsServers[0] = DNS_DEFAULT_SERVER1; 181 mDefaultDnsServers[1] = DNS_DEFAULT_SERVER2; 182 } 183 184 void updateConfiguration() { 185 String[] tetherableUsbRegexs = mContext.getResources().getStringArray( 186 com.android.internal.R.array.config_tether_usb_regexs); 187 String[] tetherableWifiRegexs = mContext.getResources().getStringArray( 188 com.android.internal.R.array.config_tether_wifi_regexs); 189 String[] tetherableBluetoothRegexs = mContext.getResources().getStringArray( 190 com.android.internal.R.array.config_tether_bluetooth_regexs); 191 192 int ifaceTypes[] = mContext.getResources().getIntArray( 193 com.android.internal.R.array.config_tether_upstream_types); 194 Collection<Integer> upstreamIfaceTypes = new ArrayList(); 195 for (int i : ifaceTypes) { 196 upstreamIfaceTypes.add(new Integer(i)); 197 } 198 199 synchronized (mPublicSync) { 200 mTetherableUsbRegexs = tetherableUsbRegexs; 201 mTetherableWifiRegexs = tetherableWifiRegexs; 202 mTetherableBluetoothRegexs = tetherableBluetoothRegexs; 203 mUpstreamIfaceTypes = upstreamIfaceTypes; 204 } 205 206 // check if the upstream type list needs to be modified due to secure-settings 207 checkDunRequired(); 208 } 209 210 public void interfaceStatusChanged(String iface, boolean up) { 211 if (VDBG) Log.d(TAG, "interfaceStatusChanged " + iface + ", " + up); 212 boolean found = false; 213 boolean usb = false; 214 synchronized (mPublicSync) { 215 if (isWifi(iface)) { 216 found = true; 217 } else if (isUsb(iface)) { 218 found = true; 219 usb = true; 220 } else if (isBluetooth(iface)) { 221 found = true; 222 } 223 if (found == false) return; 224 225 TetherInterfaceSM sm = mIfaces.get(iface); 226 if (up) { 227 if (sm == null) { 228 sm = new TetherInterfaceSM(iface, mLooper, usb); 229 mIfaces.put(iface, sm); 230 sm.start(); 231 } 232 } else { 233 if (isUsb(iface)) { 234 // ignore usb0 down after enabling RNDIS 235 // we will handle disconnect in interfaceRemoved instead 236 if (VDBG) Log.d(TAG, "ignore interface down for " + iface); 237 } else if (sm != null) { 238 sm.sendMessage(TetherInterfaceSM.CMD_INTERFACE_DOWN); 239 mIfaces.remove(iface); 240 } 241 } 242 } 243 } 244 245 public void interfaceLinkStateChanged(String iface, boolean up) { 246 if (VDBG) Log.d(TAG, "interfaceLinkStateChanged " + iface + ", " + up); 247 interfaceStatusChanged(iface, up); 248 } 249 250 private boolean isUsb(String iface) { 251 synchronized (mPublicSync) { 252 for (String regex : mTetherableUsbRegexs) { 253 if (iface.matches(regex)) return true; 254 } 255 return false; 256 } 257 } 258 259 public boolean isWifi(String iface) { 260 synchronized (mPublicSync) { 261 for (String regex : mTetherableWifiRegexs) { 262 if (iface.matches(regex)) return true; 263 } 264 return false; 265 } 266 } 267 268 public boolean isBluetooth(String iface) { 269 synchronized (mPublicSync) { 270 for (String regex : mTetherableBluetoothRegexs) { 271 if (iface.matches(regex)) return true; 272 } 273 return false; 274 } 275 } 276 277 public void interfaceAdded(String iface) { 278 if (VDBG) Log.d(TAG, "interfaceAdded " + iface); 279 boolean found = false; 280 boolean usb = false; 281 synchronized (mPublicSync) { 282 if (isWifi(iface)) { 283 found = true; 284 } 285 if (isUsb(iface)) { 286 found = true; 287 usb = true; 288 } 289 if (isBluetooth(iface)) { 290 found = true; 291 } 292 if (found == false) { 293 if (VDBG) Log.d(TAG, iface + " is not a tetherable iface, ignoring"); 294 return; 295 } 296 297 TetherInterfaceSM sm = mIfaces.get(iface); 298 if (sm != null) { 299 if (VDBG) Log.d(TAG, "active iface (" + iface + ") reported as added, ignoring"); 300 return; 301 } 302 sm = new TetherInterfaceSM(iface, mLooper, usb); 303 mIfaces.put(iface, sm); 304 sm.start(); 305 } 306 } 307 308 public void interfaceRemoved(String iface) { 309 if (VDBG) Log.d(TAG, "interfaceRemoved " + iface); 310 synchronized (mPublicSync) { 311 TetherInterfaceSM sm = mIfaces.get(iface); 312 if (sm == null) { 313 if (VDBG) { 314 Log.e(TAG, "attempting to remove unknown iface (" + iface + "), ignoring"); 315 } 316 return; 317 } 318 sm.sendMessage(TetherInterfaceSM.CMD_INTERFACE_DOWN); 319 mIfaces.remove(iface); 320 } 321 } 322 323 public void limitReached(String limitName, String iface) {} 324 325 public void interfaceClassDataActivityChanged(String label, boolean active) {} 326 327 public int tether(String iface) { 328 if (DBG) Log.d(TAG, "Tethering " + iface); 329 TetherInterfaceSM sm = null; 330 synchronized (mPublicSync) { 331 sm = mIfaces.get(iface); 332 } 333 if (sm == null) { 334 Log.e(TAG, "Tried to Tether an unknown iface :" + iface + ", ignoring"); 335 return ConnectivityManager.TETHER_ERROR_UNKNOWN_IFACE; 336 } 337 if (!sm.isAvailable() && !sm.isErrored()) { 338 Log.e(TAG, "Tried to Tether an unavailable iface :" + iface + ", ignoring"); 339 return ConnectivityManager.TETHER_ERROR_UNAVAIL_IFACE; 340 } 341 sm.sendMessage(TetherInterfaceSM.CMD_TETHER_REQUESTED); 342 return ConnectivityManager.TETHER_ERROR_NO_ERROR; 343 } 344 345 public int untether(String iface) { 346 if (DBG) Log.d(TAG, "Untethering " + iface); 347 TetherInterfaceSM sm = null; 348 synchronized (mPublicSync) { 349 sm = mIfaces.get(iface); 350 } 351 if (sm == null) { 352 Log.e(TAG, "Tried to Untether an unknown iface :" + iface + ", ignoring"); 353 return ConnectivityManager.TETHER_ERROR_UNKNOWN_IFACE; 354 } 355 if (sm.isErrored()) { 356 Log.e(TAG, "Tried to Untethered an errored iface :" + iface + ", ignoring"); 357 return ConnectivityManager.TETHER_ERROR_UNAVAIL_IFACE; 358 } 359 sm.sendMessage(TetherInterfaceSM.CMD_TETHER_UNREQUESTED); 360 return ConnectivityManager.TETHER_ERROR_NO_ERROR; 361 } 362 363 public int getLastTetherError(String iface) { 364 TetherInterfaceSM sm = null; 365 synchronized (mPublicSync) { 366 sm = mIfaces.get(iface); 367 if (sm == null) { 368 Log.e(TAG, "Tried to getLastTetherError on an unknown iface :" + iface + 369 ", ignoring"); 370 return ConnectivityManager.TETHER_ERROR_UNKNOWN_IFACE; 371 } 372 return sm.getLastError(); 373 } 374 } 375 376 // TODO - move all private methods used only by the state machine into the state machine 377 // to clarify what needs synchronized protection. 378 private void sendTetherStateChangedBroadcast() { 379 try { 380 if (!mConnService.isTetheringSupported()) return; 381 } catch (RemoteException e) { 382 return; 383 } 384 385 ArrayList<String> availableList = new ArrayList<String>(); 386 ArrayList<String> activeList = new ArrayList<String>(); 387 ArrayList<String> erroredList = new ArrayList<String>(); 388 389 boolean wifiTethered = false; 390 boolean usbTethered = false; 391 boolean bluetoothTethered = false; 392 393 synchronized (mPublicSync) { 394 Set ifaces = mIfaces.keySet(); 395 for (Object iface : ifaces) { 396 TetherInterfaceSM sm = mIfaces.get(iface); 397 if (sm != null) { 398 if (sm.isErrored()) { 399 erroredList.add((String)iface); 400 } else if (sm.isAvailable()) { 401 availableList.add((String)iface); 402 } else if (sm.isTethered()) { 403 if (isUsb((String)iface)) { 404 usbTethered = true; 405 } else if (isWifi((String)iface)) { 406 wifiTethered = true; 407 } else if (isBluetooth((String)iface)) { 408 bluetoothTethered = true; 409 } 410 activeList.add((String)iface); 411 } 412 } 413 } 414 } 415 Intent broadcast = new Intent(ConnectivityManager.ACTION_TETHER_STATE_CHANGED); 416 broadcast.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 417 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 418 broadcast.putStringArrayListExtra(ConnectivityManager.EXTRA_AVAILABLE_TETHER, 419 availableList); 420 broadcast.putStringArrayListExtra(ConnectivityManager.EXTRA_ACTIVE_TETHER, activeList); 421 broadcast.putStringArrayListExtra(ConnectivityManager.EXTRA_ERRORED_TETHER, 422 erroredList); 423 mContext.sendStickyBroadcastAsUser(broadcast, UserHandle.ALL); 424 if (DBG) { 425 Log.d(TAG, "sendTetherStateChangedBroadcast " + availableList.size() + ", " + 426 activeList.size() + ", " + erroredList.size()); 427 } 428 429 if (usbTethered) { 430 if (wifiTethered || bluetoothTethered) { 431 showTetheredNotification(com.android.internal.R.drawable.stat_sys_tether_general); 432 } else { 433 showTetheredNotification(com.android.internal.R.drawable.stat_sys_tether_usb); 434 } 435 } else if (wifiTethered) { 436 if (bluetoothTethered) { 437 showTetheredNotification(com.android.internal.R.drawable.stat_sys_tether_general); 438 } else { 439 showTetheredNotification(com.android.internal.R.drawable.stat_sys_tether_wifi); 440 } 441 } else if (bluetoothTethered) { 442 showTetheredNotification(com.android.internal.R.drawable.stat_sys_tether_bluetooth); 443 } else { 444 clearTetheredNotification(); 445 } 446 } 447 448 private void showTetheredNotification(int icon) { 449 NotificationManager notificationManager = 450 (NotificationManager)mContext.getSystemService(Context.NOTIFICATION_SERVICE); 451 if (notificationManager == null) { 452 return; 453 } 454 455 if (mTetheredNotification != null) { 456 if (mTetheredNotification.icon == icon) { 457 return; 458 } 459 notificationManager.cancelAsUser(null, mTetheredNotification.icon, 460 UserHandle.ALL); 461 } 462 463 Intent intent = new Intent(); 464 intent.setClassName("com.android.settings", "com.android.settings.TetherSettings"); 465 intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY); 466 467 PendingIntent pi = PendingIntent.getActivityAsUser(mContext, 0, intent, 0, 468 null, UserHandle.CURRENT); 469 470 Resources r = Resources.getSystem(); 471 CharSequence title = r.getText(com.android.internal.R.string.tethered_notification_title); 472 CharSequence message = r.getText(com.android.internal.R.string. 473 tethered_notification_message); 474 475 if (mTetheredNotification == null) { 476 mTetheredNotification = new Notification(); 477 mTetheredNotification.when = 0; 478 } 479 mTetheredNotification.icon = icon; 480 mTetheredNotification.defaults &= ~Notification.DEFAULT_SOUND; 481 mTetheredNotification.flags = Notification.FLAG_ONGOING_EVENT; 482 mTetheredNotification.tickerText = title; 483 mTetheredNotification.setLatestEventInfo(mContext, title, message, pi); 484 485 notificationManager.notifyAsUser(null, mTetheredNotification.icon, 486 mTetheredNotification, UserHandle.ALL); 487 } 488 489 private void clearTetheredNotification() { 490 NotificationManager notificationManager = 491 (NotificationManager)mContext.getSystemService(Context.NOTIFICATION_SERVICE); 492 if (notificationManager != null && mTetheredNotification != null) { 493 notificationManager.cancelAsUser(null, mTetheredNotification.icon, 494 UserHandle.ALL); 495 mTetheredNotification = null; 496 } 497 } 498 499 private class StateReceiver extends BroadcastReceiver { 500 public void onReceive(Context content, Intent intent) { 501 String action = intent.getAction(); 502 if (action.equals(UsbManager.ACTION_USB_STATE)) { 503 synchronized (Tethering.this.mPublicSync) { 504 boolean usbConnected = intent.getBooleanExtra(UsbManager.USB_CONNECTED, false); 505 mRndisEnabled = intent.getBooleanExtra(UsbManager.USB_FUNCTION_RNDIS, false); 506 // start tethering if we have a request pending 507 if (usbConnected && mRndisEnabled && mUsbTetherRequested) { 508 tetherUsb(true); 509 } 510 mUsbTetherRequested = false; 511 } 512 } else if (action.equals(ConnectivityManager.CONNECTIVITY_ACTION)) { 513 NetworkInfo networkInfo = (NetworkInfo)intent.getParcelableExtra( 514 ConnectivityManager.EXTRA_NETWORK_INFO); 515 if (networkInfo != null && 516 networkInfo.getDetailedState() != NetworkInfo.DetailedState.FAILED) { 517 if (VDBG) Log.d(TAG, "Tethering got CONNECTIVITY_ACTION"); 518 mTetherMasterSM.sendMessage(TetherMasterSM.CMD_UPSTREAM_CHANGED); 519 } 520 } else if (action.equals(Intent.ACTION_CONFIGURATION_CHANGED)) { 521 updateConfiguration(); 522 } 523 } 524 } 525 526 private void tetherUsb(boolean enable) { 527 if (VDBG) Log.d(TAG, "tetherUsb " + enable); 528 529 String[] ifaces = new String[0]; 530 try { 531 ifaces = mNMService.listInterfaces(); 532 } catch (Exception e) { 533 Log.e(TAG, "Error listing Interfaces", e); 534 return; 535 } 536 for (String iface : ifaces) { 537 if (isUsb(iface)) { 538 int result = (enable ? tether(iface) : untether(iface)); 539 if (result == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 540 return; 541 } 542 } 543 } 544 Log.e(TAG, "unable start or stop USB tethering"); 545 } 546 547 // configured when we start tethering and unconfig'd on error or conclusion 548 private boolean configureUsbIface(boolean enabled) { 549 if (VDBG) Log.d(TAG, "configureUsbIface(" + enabled + ")"); 550 551 // toggle the USB interfaces 552 String[] ifaces = new String[0]; 553 try { 554 ifaces = mNMService.listInterfaces(); 555 } catch (Exception e) { 556 Log.e(TAG, "Error listing Interfaces", e); 557 return false; 558 } 559 for (String iface : ifaces) { 560 if (isUsb(iface)) { 561 InterfaceConfiguration ifcg = null; 562 try { 563 ifcg = mNMService.getInterfaceConfig(iface); 564 if (ifcg != null) { 565 InetAddress addr = NetworkUtils.numericToInetAddress(USB_NEAR_IFACE_ADDR); 566 ifcg.setLinkAddress(new LinkAddress(addr, USB_PREFIX_LENGTH)); 567 if (enabled) { 568 ifcg.setInterfaceUp(); 569 } else { 570 ifcg.setInterfaceDown(); 571 } 572 ifcg.clearFlag("running"); 573 mNMService.setInterfaceConfig(iface, ifcg); 574 } 575 } catch (Exception e) { 576 Log.e(TAG, "Error configuring interface " + iface, e); 577 return false; 578 } 579 } 580 } 581 582 return true; 583 } 584 585 // TODO - return copies so people can't tamper 586 public String[] getTetherableUsbRegexs() { 587 return mTetherableUsbRegexs; 588 } 589 590 public String[] getTetherableWifiRegexs() { 591 return mTetherableWifiRegexs; 592 } 593 594 public String[] getTetherableBluetoothRegexs() { 595 return mTetherableBluetoothRegexs; 596 } 597 598 public int setUsbTethering(boolean enable) { 599 if (VDBG) Log.d(TAG, "setUsbTethering(" + enable + ")"); 600 UsbManager usbManager = (UsbManager)mContext.getSystemService(Context.USB_SERVICE); 601 602 synchronized (mPublicSync) { 603 if (enable) { 604 if (mRndisEnabled) { 605 tetherUsb(true); 606 } else { 607 mUsbTetherRequested = true; 608 usbManager.setCurrentFunction(UsbManager.USB_FUNCTION_RNDIS, false); 609 } 610 } else { 611 tetherUsb(false); 612 if (mRndisEnabled) { 613 usbManager.setCurrentFunction(null, false); 614 } 615 mUsbTetherRequested = false; 616 } 617 } 618 return ConnectivityManager.TETHER_ERROR_NO_ERROR; 619 } 620 621 public int[] getUpstreamIfaceTypes() { 622 int values[]; 623 synchronized (mPublicSync) { 624 updateConfiguration(); // TODO - remove? 625 values = new int[mUpstreamIfaceTypes.size()]; 626 Iterator<Integer> iterator = mUpstreamIfaceTypes.iterator(); 627 for (int i=0; i < mUpstreamIfaceTypes.size(); i++) { 628 values[i] = iterator.next(); 629 } 630 } 631 return values; 632 } 633 634 public void checkDunRequired() { 635 int secureSetting = Settings.Global.getInt(mContext.getContentResolver(), 636 Settings.Global.TETHER_DUN_REQUIRED, 2); 637 synchronized (mPublicSync) { 638 // 2 = not set, 0 = DUN not required, 1 = DUN required 639 if (secureSetting != 2) { 640 int requiredApn = (secureSetting == 1 ? 641 ConnectivityManager.TYPE_MOBILE_DUN : 642 ConnectivityManager.TYPE_MOBILE_HIPRI); 643 if (requiredApn == ConnectivityManager.TYPE_MOBILE_DUN) { 644 while (mUpstreamIfaceTypes.contains(MOBILE_TYPE)) { 645 mUpstreamIfaceTypes.remove(MOBILE_TYPE); 646 } 647 while (mUpstreamIfaceTypes.contains(HIPRI_TYPE)) { 648 mUpstreamIfaceTypes.remove(HIPRI_TYPE); 649 } 650 if (mUpstreamIfaceTypes.contains(DUN_TYPE) == false) { 651 mUpstreamIfaceTypes.add(DUN_TYPE); 652 } 653 } else { 654 while (mUpstreamIfaceTypes.contains(DUN_TYPE)) { 655 mUpstreamIfaceTypes.remove(DUN_TYPE); 656 } 657 if (mUpstreamIfaceTypes.contains(MOBILE_TYPE) == false) { 658 mUpstreamIfaceTypes.add(MOBILE_TYPE); 659 } 660 if (mUpstreamIfaceTypes.contains(HIPRI_TYPE) == false) { 661 mUpstreamIfaceTypes.add(HIPRI_TYPE); 662 } 663 } 664 } 665 if (mUpstreamIfaceTypes.contains(DUN_TYPE)) { 666 mPreferredUpstreamMobileApn = ConnectivityManager.TYPE_MOBILE_DUN; 667 } else { 668 mPreferredUpstreamMobileApn = ConnectivityManager.TYPE_MOBILE_HIPRI; 669 } 670 } 671 } 672 673 // TODO review API - maybe return ArrayList<String> here and below? 674 public String[] getTetheredIfaces() { 675 ArrayList<String> list = new ArrayList<String>(); 676 synchronized (mPublicSync) { 677 Set keys = mIfaces.keySet(); 678 for (Object key : keys) { 679 TetherInterfaceSM sm = mIfaces.get(key); 680 if (sm.isTethered()) { 681 list.add((String)key); 682 } 683 } 684 } 685 String[] retVal = new String[list.size()]; 686 for (int i=0; i < list.size(); i++) { 687 retVal[i] = list.get(i); 688 } 689 return retVal; 690 } 691 692 public String[] getTetheredIfacePairs() { 693 final ArrayList<String> list = Lists.newArrayList(); 694 synchronized (mPublicSync) { 695 for (TetherInterfaceSM sm : mIfaces.values()) { 696 if (sm.isTethered()) { 697 list.add(sm.mMyUpstreamIfaceName); 698 list.add(sm.mIfaceName); 699 } 700 } 701 } 702 return list.toArray(new String[list.size()]); 703 } 704 705 public String[] getTetherableIfaces() { 706 ArrayList<String> list = new ArrayList<String>(); 707 synchronized (mPublicSync) { 708 Set keys = mIfaces.keySet(); 709 for (Object key : keys) { 710 TetherInterfaceSM sm = mIfaces.get(key); 711 if (sm.isAvailable()) { 712 list.add((String)key); 713 } 714 } 715 } 716 String[] retVal = new String[list.size()]; 717 for (int i=0; i < list.size(); i++) { 718 retVal[i] = list.get(i); 719 } 720 return retVal; 721 } 722 723 public String[] getErroredIfaces() { 724 ArrayList<String> list = new ArrayList<String>(); 725 synchronized (mPublicSync) { 726 Set keys = mIfaces.keySet(); 727 for (Object key : keys) { 728 TetherInterfaceSM sm = mIfaces.get(key); 729 if (sm.isErrored()) { 730 list.add((String)key); 731 } 732 } 733 } 734 String[] retVal = new String[list.size()]; 735 for (int i= 0; i< list.size(); i++) { 736 retVal[i] = list.get(i); 737 } 738 return retVal; 739 } 740 741 //TODO: Temporary handling upstream change triggered without 742 // CONNECTIVITY_ACTION. Only to accomodate interface 743 // switch during HO. 744 // @see bug/4455071 745 public void handleTetherIfaceChange() { 746 mTetherMasterSM.sendMessage(TetherMasterSM.CMD_UPSTREAM_CHANGED); 747 } 748 749 class TetherInterfaceSM extends StateMachine { 750 // notification from the master SM that it's not in tether mode 751 static final int CMD_TETHER_MODE_DEAD = 1; 752 // request from the user that it wants to tether 753 static final int CMD_TETHER_REQUESTED = 2; 754 // request from the user that it wants to untether 755 static final int CMD_TETHER_UNREQUESTED = 3; 756 // notification that this interface is down 757 static final int CMD_INTERFACE_DOWN = 4; 758 // notification that this interface is up 759 static final int CMD_INTERFACE_UP = 5; 760 // notification from the master SM that it had an error turning on cellular dun 761 static final int CMD_CELL_DUN_ERROR = 6; 762 // notification from the master SM that it had trouble enabling IP Forwarding 763 static final int CMD_IP_FORWARDING_ENABLE_ERROR = 7; 764 // notification from the master SM that it had trouble disabling IP Forwarding 765 static final int CMD_IP_FORWARDING_DISABLE_ERROR = 8; 766 // notification from the master SM that it had trouble staring tethering 767 static final int CMD_START_TETHERING_ERROR = 9; 768 // notification from the master SM that it had trouble stopping tethering 769 static final int CMD_STOP_TETHERING_ERROR = 10; 770 // notification from the master SM that it had trouble setting the DNS forwarders 771 static final int CMD_SET_DNS_FORWARDERS_ERROR = 11; 772 // the upstream connection has changed 773 static final int CMD_TETHER_CONNECTION_CHANGED = 12; 774 775 private State mDefaultState; 776 777 private State mInitialState; 778 private State mStartingState; 779 private State mTetheredState; 780 781 private State mUnavailableState; 782 783 private boolean mAvailable; 784 private boolean mTethered; 785 int mLastError; 786 787 String mIfaceName; 788 String mMyUpstreamIfaceName; // may change over time 789 790 boolean mUsb; 791 792 TetherInterfaceSM(String name, Looper looper, boolean usb) { 793 super(name, looper); 794 mIfaceName = name; 795 mUsb = usb; 796 setLastError(ConnectivityManager.TETHER_ERROR_NO_ERROR); 797 798 mInitialState = new InitialState(); 799 addState(mInitialState); 800 mStartingState = new StartingState(); 801 addState(mStartingState); 802 mTetheredState = new TetheredState(); 803 addState(mTetheredState); 804 mUnavailableState = new UnavailableState(); 805 addState(mUnavailableState); 806 807 setInitialState(mInitialState); 808 } 809 810 public String toString() { 811 String res = new String(); 812 res += mIfaceName + " - "; 813 IState current = getCurrentState(); 814 if (current == mInitialState) res += "InitialState"; 815 if (current == mStartingState) res += "StartingState"; 816 if (current == mTetheredState) res += "TetheredState"; 817 if (current == mUnavailableState) res += "UnavailableState"; 818 if (mAvailable) res += " - Available"; 819 if (mTethered) res += " - Tethered"; 820 res += " - lastError =" + mLastError; 821 return res; 822 } 823 824 public int getLastError() { 825 synchronized (Tethering.this.mPublicSync) { 826 return mLastError; 827 } 828 } 829 830 private void setLastError(int error) { 831 synchronized (Tethering.this.mPublicSync) { 832 mLastError = error; 833 834 if (isErrored()) { 835 if (mUsb) { 836 // note everything's been unwound by this point so nothing to do on 837 // further error.. 838 Tethering.this.configureUsbIface(false); 839 } 840 } 841 } 842 } 843 844 public boolean isAvailable() { 845 synchronized (Tethering.this.mPublicSync) { 846 return mAvailable; 847 } 848 } 849 850 private void setAvailable(boolean available) { 851 synchronized (Tethering.this.mPublicSync) { 852 mAvailable = available; 853 } 854 } 855 856 public boolean isTethered() { 857 synchronized (Tethering.this.mPublicSync) { 858 return mTethered; 859 } 860 } 861 862 private void setTethered(boolean tethered) { 863 synchronized (Tethering.this.mPublicSync) { 864 mTethered = tethered; 865 } 866 } 867 868 public boolean isErrored() { 869 synchronized (Tethering.this.mPublicSync) { 870 return (mLastError != ConnectivityManager.TETHER_ERROR_NO_ERROR); 871 } 872 } 873 874 class InitialState extends State { 875 @Override 876 public void enter() { 877 setAvailable(true); 878 setTethered(false); 879 sendTetherStateChangedBroadcast(); 880 } 881 882 @Override 883 public boolean processMessage(Message message) { 884 if (DBG) Log.d(TAG, "InitialState.processMessage what=" + message.what); 885 boolean retValue = true; 886 switch (message.what) { 887 case CMD_TETHER_REQUESTED: 888 setLastError(ConnectivityManager.TETHER_ERROR_NO_ERROR); 889 mTetherMasterSM.sendMessage(TetherMasterSM.CMD_TETHER_MODE_REQUESTED, 890 TetherInterfaceSM.this); 891 transitionTo(mStartingState); 892 break; 893 case CMD_INTERFACE_DOWN: 894 transitionTo(mUnavailableState); 895 break; 896 default: 897 retValue = false; 898 break; 899 } 900 return retValue; 901 } 902 } 903 904 class StartingState extends State { 905 @Override 906 public void enter() { 907 setAvailable(false); 908 if (mUsb) { 909 if (!Tethering.this.configureUsbIface(true)) { 910 mTetherMasterSM.sendMessage(TetherMasterSM.CMD_TETHER_MODE_UNREQUESTED, 911 TetherInterfaceSM.this); 912 setLastError(ConnectivityManager.TETHER_ERROR_IFACE_CFG_ERROR); 913 914 transitionTo(mInitialState); 915 return; 916 } 917 } 918 sendTetherStateChangedBroadcast(); 919 920 // Skipping StartingState 921 transitionTo(mTetheredState); 922 } 923 @Override 924 public boolean processMessage(Message message) { 925 if (DBG) Log.d(TAG, "StartingState.processMessage what=" + message.what); 926 boolean retValue = true; 927 switch (message.what) { 928 // maybe a parent class? 929 case CMD_TETHER_UNREQUESTED: 930 mTetherMasterSM.sendMessage(TetherMasterSM.CMD_TETHER_MODE_UNREQUESTED, 931 TetherInterfaceSM.this); 932 if (mUsb) { 933 if (!Tethering.this.configureUsbIface(false)) { 934 setLastErrorAndTransitionToInitialState( 935 ConnectivityManager.TETHER_ERROR_IFACE_CFG_ERROR); 936 break; 937 } 938 } 939 transitionTo(mInitialState); 940 break; 941 case CMD_CELL_DUN_ERROR: 942 case CMD_IP_FORWARDING_ENABLE_ERROR: 943 case CMD_IP_FORWARDING_DISABLE_ERROR: 944 case CMD_START_TETHERING_ERROR: 945 case CMD_STOP_TETHERING_ERROR: 946 case CMD_SET_DNS_FORWARDERS_ERROR: 947 setLastErrorAndTransitionToInitialState( 948 ConnectivityManager.TETHER_ERROR_MASTER_ERROR); 949 break; 950 case CMD_INTERFACE_DOWN: 951 mTetherMasterSM.sendMessage(TetherMasterSM.CMD_TETHER_MODE_UNREQUESTED, 952 TetherInterfaceSM.this); 953 transitionTo(mUnavailableState); 954 break; 955 default: 956 retValue = false; 957 } 958 return retValue; 959 } 960 } 961 962 class TetheredState extends State { 963 @Override 964 public void enter() { 965 try { 966 mNMService.tetherInterface(mIfaceName); 967 } catch (Exception e) { 968 Log.e(TAG, "Error Tethering: " + e.toString()); 969 setLastError(ConnectivityManager.TETHER_ERROR_TETHER_IFACE_ERROR); 970 971 transitionTo(mInitialState); 972 return; 973 } 974 if (DBG) Log.d(TAG, "Tethered " + mIfaceName); 975 setAvailable(false); 976 setTethered(true); 977 sendTetherStateChangedBroadcast(); 978 } 979 980 private void cleanupUpstream() { 981 if (mMyUpstreamIfaceName != null) { 982 // note that we don't care about errors here. 983 // sometimes interfaces are gone before we get 984 // to remove their rules, which generates errors. 985 // just do the best we can. 986 try { 987 // about to tear down NAT; gather remaining statistics 988 mStatsService.forceUpdate(); 989 } catch (Exception e) { 990 if (VDBG) Log.e(TAG, "Exception in forceUpdate: " + e.toString()); 991 } 992 try { 993 mNMService.disableNat(mIfaceName, mMyUpstreamIfaceName); 994 } catch (Exception e) { 995 if (VDBG) Log.e(TAG, "Exception in disableNat: " + e.toString()); 996 } 997 mMyUpstreamIfaceName = null; 998 } 999 return; 1000 } 1001 1002 @Override 1003 public boolean processMessage(Message message) { 1004 if (DBG) Log.d(TAG, "TetheredState.processMessage what=" + message.what); 1005 boolean retValue = true; 1006 boolean error = false; 1007 switch (message.what) { 1008 case CMD_TETHER_UNREQUESTED: 1009 case CMD_INTERFACE_DOWN: 1010 cleanupUpstream(); 1011 try { 1012 mNMService.untetherInterface(mIfaceName); 1013 } catch (Exception e) { 1014 setLastErrorAndTransitionToInitialState( 1015 ConnectivityManager.TETHER_ERROR_UNTETHER_IFACE_ERROR); 1016 break; 1017 } 1018 mTetherMasterSM.sendMessage(TetherMasterSM.CMD_TETHER_MODE_UNREQUESTED, 1019 TetherInterfaceSM.this); 1020 if (message.what == CMD_TETHER_UNREQUESTED) { 1021 if (mUsb) { 1022 if (!Tethering.this.configureUsbIface(false)) { 1023 setLastError( 1024 ConnectivityManager.TETHER_ERROR_IFACE_CFG_ERROR); 1025 } 1026 } 1027 transitionTo(mInitialState); 1028 } else if (message.what == CMD_INTERFACE_DOWN) { 1029 transitionTo(mUnavailableState); 1030 } 1031 if (DBG) Log.d(TAG, "Untethered " + mIfaceName); 1032 break; 1033 case CMD_TETHER_CONNECTION_CHANGED: 1034 String newUpstreamIfaceName = (String)(message.obj); 1035 if ((mMyUpstreamIfaceName == null && newUpstreamIfaceName == null) || 1036 (mMyUpstreamIfaceName != null && 1037 mMyUpstreamIfaceName.equals(newUpstreamIfaceName))) { 1038 if (VDBG) Log.d(TAG, "Connection changed noop - dropping"); 1039 break; 1040 } 1041 cleanupUpstream(); 1042 if (newUpstreamIfaceName != null) { 1043 try { 1044 mNMService.enableNat(mIfaceName, newUpstreamIfaceName); 1045 } catch (Exception e) { 1046 Log.e(TAG, "Exception enabling Nat: " + e.toString()); 1047 try { 1048 mNMService.untetherInterface(mIfaceName); 1049 } catch (Exception ee) {} 1050 1051 setLastError(ConnectivityManager.TETHER_ERROR_ENABLE_NAT_ERROR); 1052 transitionTo(mInitialState); 1053 return true; 1054 } 1055 } 1056 mMyUpstreamIfaceName = newUpstreamIfaceName; 1057 break; 1058 case CMD_CELL_DUN_ERROR: 1059 case CMD_IP_FORWARDING_ENABLE_ERROR: 1060 case CMD_IP_FORWARDING_DISABLE_ERROR: 1061 case CMD_START_TETHERING_ERROR: 1062 case CMD_STOP_TETHERING_ERROR: 1063 case CMD_SET_DNS_FORWARDERS_ERROR: 1064 error = true; 1065 // fall through 1066 case CMD_TETHER_MODE_DEAD: 1067 cleanupUpstream(); 1068 try { 1069 mNMService.untetherInterface(mIfaceName); 1070 } catch (Exception e) { 1071 setLastErrorAndTransitionToInitialState( 1072 ConnectivityManager.TETHER_ERROR_UNTETHER_IFACE_ERROR); 1073 break; 1074 } 1075 if (error) { 1076 setLastErrorAndTransitionToInitialState( 1077 ConnectivityManager.TETHER_ERROR_MASTER_ERROR); 1078 break; 1079 } 1080 if (DBG) Log.d(TAG, "Tether lost upstream connection " + mIfaceName); 1081 sendTetherStateChangedBroadcast(); 1082 if (mUsb) { 1083 if (!Tethering.this.configureUsbIface(false)) { 1084 setLastError(ConnectivityManager.TETHER_ERROR_IFACE_CFG_ERROR); 1085 } 1086 } 1087 transitionTo(mInitialState); 1088 break; 1089 default: 1090 retValue = false; 1091 break; 1092 } 1093 return retValue; 1094 } 1095 } 1096 1097 class UnavailableState extends State { 1098 @Override 1099 public void enter() { 1100 setAvailable(false); 1101 setLastError(ConnectivityManager.TETHER_ERROR_NO_ERROR); 1102 setTethered(false); 1103 sendTetherStateChangedBroadcast(); 1104 } 1105 @Override 1106 public boolean processMessage(Message message) { 1107 boolean retValue = true; 1108 switch (message.what) { 1109 case CMD_INTERFACE_UP: 1110 transitionTo(mInitialState); 1111 break; 1112 default: 1113 retValue = false; 1114 break; 1115 } 1116 return retValue; 1117 } 1118 } 1119 1120 void setLastErrorAndTransitionToInitialState(int error) { 1121 setLastError(error); 1122 transitionTo(mInitialState); 1123 } 1124 1125 } 1126 1127 class TetherMasterSM extends StateMachine { 1128 // an interface SM has requested Tethering 1129 static final int CMD_TETHER_MODE_REQUESTED = 1; 1130 // an interface SM has unrequested Tethering 1131 static final int CMD_TETHER_MODE_UNREQUESTED = 2; 1132 // upstream connection change - do the right thing 1133 static final int CMD_UPSTREAM_CHANGED = 3; 1134 // we received notice that the cellular DUN connection is up 1135 static final int CMD_CELL_CONNECTION_RENEW = 4; 1136 // we don't have a valid upstream conn, check again after a delay 1137 static final int CMD_RETRY_UPSTREAM = 5; 1138 1139 // This indicates what a timeout event relates to. A state that 1140 // sends itself a delayed timeout event and handles incoming timeout events 1141 // should inc this when it is entered and whenever it sends a new timeout event. 1142 // We do not flush the old ones. 1143 private int mSequenceNumber; 1144 1145 private State mInitialState; 1146 private State mTetherModeAliveState; 1147 1148 private State mSetIpForwardingEnabledErrorState; 1149 private State mSetIpForwardingDisabledErrorState; 1150 private State mStartTetheringErrorState; 1151 private State mStopTetheringErrorState; 1152 private State mSetDnsForwardersErrorState; 1153 1154 private ArrayList<TetherInterfaceSM> mNotifyList; 1155 1156 private int mCurrentConnectionSequence; 1157 private int mMobileApnReserved = ConnectivityManager.TYPE_NONE; 1158 1159 private String mUpstreamIfaceName = null; 1160 1161 private static final int UPSTREAM_SETTLE_TIME_MS = 10000; 1162 private static final int CELL_CONNECTION_RENEW_MS = 40000; 1163 1164 TetherMasterSM(String name, Looper looper) { 1165 super(name, looper); 1166 1167 //Add states 1168 mInitialState = new InitialState(); 1169 addState(mInitialState); 1170 mTetherModeAliveState = new TetherModeAliveState(); 1171 addState(mTetherModeAliveState); 1172 1173 mSetIpForwardingEnabledErrorState = new SetIpForwardingEnabledErrorState(); 1174 addState(mSetIpForwardingEnabledErrorState); 1175 mSetIpForwardingDisabledErrorState = new SetIpForwardingDisabledErrorState(); 1176 addState(mSetIpForwardingDisabledErrorState); 1177 mStartTetheringErrorState = new StartTetheringErrorState(); 1178 addState(mStartTetheringErrorState); 1179 mStopTetheringErrorState = new StopTetheringErrorState(); 1180 addState(mStopTetheringErrorState); 1181 mSetDnsForwardersErrorState = new SetDnsForwardersErrorState(); 1182 addState(mSetDnsForwardersErrorState); 1183 1184 mNotifyList = new ArrayList<TetherInterfaceSM>(); 1185 setInitialState(mInitialState); 1186 } 1187 1188 class TetherMasterUtilState extends State { 1189 protected final static boolean TRY_TO_SETUP_MOBILE_CONNECTION = true; 1190 protected final static boolean WAIT_FOR_NETWORK_TO_SETTLE = false; 1191 1192 @Override 1193 public boolean processMessage(Message m) { 1194 return false; 1195 } 1196 protected String enableString(int apnType) { 1197 switch (apnType) { 1198 case ConnectivityManager.TYPE_MOBILE_DUN: 1199 return Phone.FEATURE_ENABLE_DUN_ALWAYS; 1200 case ConnectivityManager.TYPE_MOBILE: 1201 case ConnectivityManager.TYPE_MOBILE_HIPRI: 1202 return Phone.FEATURE_ENABLE_HIPRI; 1203 } 1204 return null; 1205 } 1206 protected boolean turnOnUpstreamMobileConnection(int apnType) { 1207 boolean retValue = true; 1208 if (apnType == ConnectivityManager.TYPE_NONE) return false; 1209 if (apnType != mMobileApnReserved) turnOffUpstreamMobileConnection(); 1210 int result = PhoneConstants.APN_REQUEST_FAILED; 1211 String enableString = enableString(apnType); 1212 if (enableString == null) return false; 1213 try { 1214 result = mConnService.startUsingNetworkFeature(ConnectivityManager.TYPE_MOBILE, 1215 enableString, new Binder()); 1216 } catch (Exception e) { 1217 } 1218 switch (result) { 1219 case PhoneConstants.APN_ALREADY_ACTIVE: 1220 case PhoneConstants.APN_REQUEST_STARTED: 1221 mMobileApnReserved = apnType; 1222 Message m = obtainMessage(CMD_CELL_CONNECTION_RENEW); 1223 m.arg1 = ++mCurrentConnectionSequence; 1224 sendMessageDelayed(m, CELL_CONNECTION_RENEW_MS); 1225 break; 1226 case PhoneConstants.APN_REQUEST_FAILED: 1227 default: 1228 retValue = false; 1229 break; 1230 } 1231 1232 return retValue; 1233 } 1234 protected boolean turnOffUpstreamMobileConnection() { 1235 // ignore pending renewal requests 1236 ++mCurrentConnectionSequence; 1237 if (mMobileApnReserved != ConnectivityManager.TYPE_NONE) { 1238 try { 1239 mConnService.stopUsingNetworkFeature(ConnectivityManager.TYPE_MOBILE, 1240 enableString(mMobileApnReserved)); 1241 } catch (Exception e) { 1242 return false; 1243 } 1244 mMobileApnReserved = ConnectivityManager.TYPE_NONE; 1245 } 1246 return true; 1247 } 1248 protected boolean turnOnMasterTetherSettings() { 1249 try { 1250 mNMService.setIpForwardingEnabled(true); 1251 } catch (Exception e) { 1252 transitionTo(mSetIpForwardingEnabledErrorState); 1253 return false; 1254 } 1255 try { 1256 mNMService.startTethering(mDhcpRange); 1257 } catch (Exception e) { 1258 try { 1259 mNMService.stopTethering(); 1260 mNMService.startTethering(mDhcpRange); 1261 } catch (Exception ee) { 1262 transitionTo(mStartTetheringErrorState); 1263 return false; 1264 } 1265 } 1266 try { 1267 mNMService.setDnsForwarders(mDefaultDnsServers); 1268 } catch (Exception e) { 1269 transitionTo(mSetDnsForwardersErrorState); 1270 return false; 1271 } 1272 return true; 1273 } 1274 protected boolean turnOffMasterTetherSettings() { 1275 try { 1276 mNMService.stopTethering(); 1277 } catch (Exception e) { 1278 transitionTo(mStopTetheringErrorState); 1279 return false; 1280 } 1281 try { 1282 mNMService.setIpForwardingEnabled(false); 1283 } catch (Exception e) { 1284 transitionTo(mSetIpForwardingDisabledErrorState); 1285 return false; 1286 } 1287 transitionTo(mInitialState); 1288 return true; 1289 } 1290 1291 protected void chooseUpstreamType(boolean tryCell) { 1292 int upType = ConnectivityManager.TYPE_NONE; 1293 String iface = null; 1294 1295 updateConfiguration(); // TODO - remove? 1296 1297 synchronized (mPublicSync) { 1298 if (VDBG) { 1299 Log.d(TAG, "chooseUpstreamType has upstream iface types:"); 1300 for (Integer netType : mUpstreamIfaceTypes) { 1301 Log.d(TAG, " " + netType); 1302 } 1303 } 1304 1305 for (Integer netType : mUpstreamIfaceTypes) { 1306 NetworkInfo info = null; 1307 try { 1308 info = mConnService.getNetworkInfo(netType.intValue()); 1309 } catch (RemoteException e) { } 1310 if ((info != null) && info.isConnected()) { 1311 upType = netType.intValue(); 1312 break; 1313 } 1314 } 1315 } 1316 1317 if (DBG) { 1318 Log.d(TAG, "chooseUpstreamType(" + tryCell + "), preferredApn =" 1319 + mPreferredUpstreamMobileApn + ", got type=" + upType); 1320 } 1321 1322 // if we're on DUN, put our own grab on it 1323 if (upType == ConnectivityManager.TYPE_MOBILE_DUN || 1324 upType == ConnectivityManager.TYPE_MOBILE_HIPRI) { 1325 turnOnUpstreamMobileConnection(upType); 1326 } else if (upType != ConnectivityManager.TYPE_NONE) { 1327 /* If we've found an active upstream connection that's not DUN/HIPRI 1328 * we should stop any outstanding DUN/HIPRI start requests. 1329 * 1330 * If we found NONE we don't want to do this as we want any previous 1331 * requests to keep trying to bring up something we can use. 1332 */ 1333 turnOffUpstreamMobileConnection(); 1334 } 1335 1336 if (upType == ConnectivityManager.TYPE_NONE) { 1337 boolean tryAgainLater = true; 1338 if ((tryCell == TRY_TO_SETUP_MOBILE_CONNECTION) && 1339 (turnOnUpstreamMobileConnection(mPreferredUpstreamMobileApn) == true)) { 1340 // we think mobile should be coming up - don't set a retry 1341 tryAgainLater = false; 1342 } 1343 if (tryAgainLater) { 1344 sendMessageDelayed(CMD_RETRY_UPSTREAM, UPSTREAM_SETTLE_TIME_MS); 1345 } 1346 } else { 1347 LinkProperties linkProperties = null; 1348 try { 1349 linkProperties = mConnService.getLinkProperties(upType); 1350 } catch (RemoteException e) { } 1351 if (linkProperties != null) { 1352 // Find the interface with the default IPv4 route. It may be the 1353 // interface described by linkProperties, or one of the interfaces 1354 // stacked on top of it. 1355 Log.i(TAG, "Finding IPv4 upstream interface on: " + linkProperties); 1356 RouteInfo ipv4Default = RouteInfo.selectBestRoute( 1357 linkProperties.getAllRoutes(), Inet4Address.ANY); 1358 if (ipv4Default != null) { 1359 iface = ipv4Default.getInterface(); 1360 Log.i(TAG, "Found interface " + ipv4Default.getInterface()); 1361 } else { 1362 Log.i(TAG, "No IPv4 upstream interface, giving up."); 1363 } 1364 } 1365 1366 if (iface != null) { 1367 String[] dnsServers = mDefaultDnsServers; 1368 Collection<InetAddress> dnses = linkProperties.getDnses(); 1369 if (dnses != null) { 1370 // we currently only handle IPv4 1371 ArrayList<InetAddress> v4Dnses = 1372 new ArrayList<InetAddress>(dnses.size()); 1373 for (InetAddress dnsAddress : dnses) { 1374 if (dnsAddress instanceof Inet4Address) { 1375 v4Dnses.add(dnsAddress); 1376 } 1377 } 1378 if (v4Dnses.size() > 0) { 1379 dnsServers = NetworkUtils.makeStrings(v4Dnses); 1380 } 1381 } 1382 try { 1383 mNMService.setDnsForwarders(dnsServers); 1384 } catch (Exception e) { 1385 transitionTo(mSetDnsForwardersErrorState); 1386 } 1387 } 1388 } 1389 notifyTetheredOfNewUpstreamIface(iface); 1390 } 1391 1392 protected void notifyTetheredOfNewUpstreamIface(String ifaceName) { 1393 if (DBG) Log.d(TAG, "notifying tethered with iface =" + ifaceName); 1394 mUpstreamIfaceName = ifaceName; 1395 for (TetherInterfaceSM sm : mNotifyList) { 1396 sm.sendMessage(TetherInterfaceSM.CMD_TETHER_CONNECTION_CHANGED, 1397 ifaceName); 1398 } 1399 } 1400 } 1401 1402 class InitialState extends TetherMasterUtilState { 1403 @Override 1404 public void enter() { 1405 } 1406 @Override 1407 public boolean processMessage(Message message) { 1408 if (DBG) Log.d(TAG, "MasterInitialState.processMessage what=" + message.what); 1409 boolean retValue = true; 1410 switch (message.what) { 1411 case CMD_TETHER_MODE_REQUESTED: 1412 TetherInterfaceSM who = (TetherInterfaceSM)message.obj; 1413 if (VDBG) Log.d(TAG, "Tether Mode requested by " + who); 1414 mNotifyList.add(who); 1415 transitionTo(mTetherModeAliveState); 1416 break; 1417 case CMD_TETHER_MODE_UNREQUESTED: 1418 who = (TetherInterfaceSM)message.obj; 1419 if (VDBG) Log.d(TAG, "Tether Mode unrequested by " + who); 1420 int index = mNotifyList.indexOf(who); 1421 if (index != -1) { 1422 mNotifyList.remove(who); 1423 } 1424 break; 1425 default: 1426 retValue = false; 1427 break; 1428 } 1429 return retValue; 1430 } 1431 } 1432 1433 class TetherModeAliveState extends TetherMasterUtilState { 1434 boolean mTryCell = !WAIT_FOR_NETWORK_TO_SETTLE; 1435 @Override 1436 public void enter() { 1437 turnOnMasterTetherSettings(); // may transition us out 1438 1439 mTryCell = !WAIT_FOR_NETWORK_TO_SETTLE; // better try something first pass 1440 // or crazy tests cases will fail 1441 chooseUpstreamType(mTryCell); 1442 mTryCell = !mTryCell; 1443 } 1444 @Override 1445 public void exit() { 1446 turnOffUpstreamMobileConnection(); 1447 notifyTetheredOfNewUpstreamIface(null); 1448 } 1449 @Override 1450 public boolean processMessage(Message message) { 1451 if (DBG) Log.d(TAG, "TetherModeAliveState.processMessage what=" + message.what); 1452 boolean retValue = true; 1453 switch (message.what) { 1454 case CMD_TETHER_MODE_REQUESTED: 1455 TetherInterfaceSM who = (TetherInterfaceSM)message.obj; 1456 if (VDBG) Log.d(TAG, "Tether Mode requested by " + who); 1457 mNotifyList.add(who); 1458 who.sendMessage(TetherInterfaceSM.CMD_TETHER_CONNECTION_CHANGED, 1459 mUpstreamIfaceName); 1460 break; 1461 case CMD_TETHER_MODE_UNREQUESTED: 1462 who = (TetherInterfaceSM)message.obj; 1463 if (VDBG) Log.d(TAG, "Tether Mode unrequested by " + who); 1464 int index = mNotifyList.indexOf(who); 1465 if (index != -1) { 1466 if (DBG) Log.d(TAG, "TetherModeAlive removing notifyee " + who); 1467 mNotifyList.remove(index); 1468 if (mNotifyList.isEmpty()) { 1469 turnOffMasterTetherSettings(); // transitions appropriately 1470 } else { 1471 if (DBG) { 1472 Log.d(TAG, "TetherModeAlive still has " + mNotifyList.size() + 1473 " live requests:"); 1474 for (Object o : mNotifyList) Log.d(TAG, " " + o); 1475 } 1476 } 1477 } else { 1478 Log.e(TAG, "TetherModeAliveState UNREQUESTED has unknown who: " + who); 1479 } 1480 break; 1481 case CMD_UPSTREAM_CHANGED: 1482 // need to try DUN immediately if Wifi goes down 1483 mTryCell = !WAIT_FOR_NETWORK_TO_SETTLE; 1484 chooseUpstreamType(mTryCell); 1485 mTryCell = !mTryCell; 1486 break; 1487 case CMD_CELL_CONNECTION_RENEW: 1488 // make sure we're still using a requested connection - may have found 1489 // wifi or something since then. 1490 if (mCurrentConnectionSequence == message.arg1) { 1491 if (VDBG) { 1492 Log.d(TAG, "renewing mobile connection - requeuing for another " + 1493 CELL_CONNECTION_RENEW_MS + "ms"); 1494 } 1495 turnOnUpstreamMobileConnection(mMobileApnReserved); 1496 } 1497 break; 1498 case CMD_RETRY_UPSTREAM: 1499 chooseUpstreamType(mTryCell); 1500 mTryCell = !mTryCell; 1501 break; 1502 default: 1503 retValue = false; 1504 break; 1505 } 1506 return retValue; 1507 } 1508 } 1509 1510 class ErrorState extends State { 1511 int mErrorNotification; 1512 @Override 1513 public boolean processMessage(Message message) { 1514 boolean retValue = true; 1515 switch (message.what) { 1516 case CMD_TETHER_MODE_REQUESTED: 1517 TetherInterfaceSM who = (TetherInterfaceSM)message.obj; 1518 who.sendMessage(mErrorNotification); 1519 break; 1520 default: 1521 retValue = false; 1522 } 1523 return retValue; 1524 } 1525 void notify(int msgType) { 1526 mErrorNotification = msgType; 1527 for (Object o : mNotifyList) { 1528 TetherInterfaceSM sm = (TetherInterfaceSM)o; 1529 sm.sendMessage(msgType); 1530 } 1531 } 1532 1533 } 1534 class SetIpForwardingEnabledErrorState extends ErrorState { 1535 @Override 1536 public void enter() { 1537 Log.e(TAG, "Error in setIpForwardingEnabled"); 1538 notify(TetherInterfaceSM.CMD_IP_FORWARDING_ENABLE_ERROR); 1539 } 1540 } 1541 1542 class SetIpForwardingDisabledErrorState extends ErrorState { 1543 @Override 1544 public void enter() { 1545 Log.e(TAG, "Error in setIpForwardingDisabled"); 1546 notify(TetherInterfaceSM.CMD_IP_FORWARDING_DISABLE_ERROR); 1547 } 1548 } 1549 1550 class StartTetheringErrorState extends ErrorState { 1551 @Override 1552 public void enter() { 1553 Log.e(TAG, "Error in startTethering"); 1554 notify(TetherInterfaceSM.CMD_START_TETHERING_ERROR); 1555 try { 1556 mNMService.setIpForwardingEnabled(false); 1557 } catch (Exception e) {} 1558 } 1559 } 1560 1561 class StopTetheringErrorState extends ErrorState { 1562 @Override 1563 public void enter() { 1564 Log.e(TAG, "Error in stopTethering"); 1565 notify(TetherInterfaceSM.CMD_STOP_TETHERING_ERROR); 1566 try { 1567 mNMService.setIpForwardingEnabled(false); 1568 } catch (Exception e) {} 1569 } 1570 } 1571 1572 class SetDnsForwardersErrorState extends ErrorState { 1573 @Override 1574 public void enter() { 1575 Log.e(TAG, "Error in setDnsForwarders"); 1576 notify(TetherInterfaceSM.CMD_SET_DNS_FORWARDERS_ERROR); 1577 try { 1578 mNMService.stopTethering(); 1579 } catch (Exception e) {} 1580 try { 1581 mNMService.setIpForwardingEnabled(false); 1582 } catch (Exception e) {} 1583 } 1584 } 1585 } 1586 1587 public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1588 if (mContext.checkCallingOrSelfPermission( 1589 android.Manifest.permission.DUMP) != PackageManager.PERMISSION_GRANTED) { 1590 pw.println("Permission Denial: can't dump ConnectivityService.Tether " + 1591 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1592 Binder.getCallingUid()); 1593 return; 1594 } 1595 1596 synchronized (mPublicSync) { 1597 pw.println("mUpstreamIfaceTypes: "); 1598 for (Integer netType : mUpstreamIfaceTypes) { 1599 pw.println(" " + netType); 1600 } 1601 1602 pw.println(); 1603 pw.println("Tether state:"); 1604 for (Object o : mIfaces.values()) { 1605 pw.println(" " + o); 1606 } 1607 } 1608 pw.println(); 1609 return; 1610 } 1611 } 1612
