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diff --git a/services/core/java/com/android/server/connectivity/Tethering.java b/services/core/java/com/android/server/connectivity/Tethering.java
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+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.connectivity;
+
+import android.app.Notification;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.pm.PackageManager;
+import android.content.res.Resources;
+import android.hardware.usb.UsbManager;
+import android.net.ConnectivityManager;
+import android.net.IConnectivityManager;
+import android.net.INetworkStatsService;
+import android.net.InterfaceConfiguration;
+import android.net.LinkAddress;
+import android.net.LinkProperties;
+import android.net.NetworkInfo;
+import android.net.NetworkUtils;
+import android.net.RouteInfo;
+import android.os.Binder;
+import android.os.INetworkManagementService;
+import android.os.Looper;
+import android.os.Message;
+import android.os.RemoteException;
+import android.os.UserHandle;
+import android.provider.Settings;
+import android.util.Log;
+
+import com.android.internal.telephony.Phone;
+import com.android.internal.telephony.PhoneConstants;
+import com.android.internal.util.IState;
+import com.android.internal.util.State;
+import com.android.internal.util.StateMachine;
+import com.android.server.IoThread;
+import com.android.server.net.BaseNetworkObserver;
+
+import java.io.FileDescriptor;
+import java.io.PrintWriter;
+import java.net.InetAddress;
+import java.net.Inet4Address;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Set;
+
+/**
+ * @hide
+ *
+ * Timeout
+ *
+ * TODO - look for parent classes and code sharing
+ */
+public class Tethering extends BaseNetworkObserver {
+
+ private Context mContext;
+ private final static String TAG = "Tethering";
+ private final static boolean DBG = true;
+ private final static boolean VDBG = false;
+
+ // TODO - remove both of these - should be part of interface inspection/selection stuff
+ private String[] mTetherableUsbRegexs;
+ private String[] mTetherableWifiRegexs;
+ private String[] mTetherableBluetoothRegexs;
+ private Collection<Integer> mUpstreamIfaceTypes;
+
+ // used to synchronize public access to members
+ private Object mPublicSync;
+
+ private static final Integer MOBILE_TYPE = new Integer(ConnectivityManager.TYPE_MOBILE);
+ private static final Integer HIPRI_TYPE = new Integer(ConnectivityManager.TYPE_MOBILE_HIPRI);
+ private static final Integer DUN_TYPE = new Integer(ConnectivityManager.TYPE_MOBILE_DUN);
+
+ // if we have to connect to mobile, what APN type should we use? Calculated by examining the
+ // upstream type list and the DUN_REQUIRED secure-setting
+ private int mPreferredUpstreamMobileApn = ConnectivityManager.TYPE_NONE;
+
+ private final INetworkManagementService mNMService;
+ private final INetworkStatsService mStatsService;
+ private final IConnectivityManager mConnService;
+ private Looper mLooper;
+
+ private HashMap<String, TetherInterfaceSM> mIfaces; // all tethered/tetherable ifaces
+
+ private BroadcastReceiver mStateReceiver;
+
+ private static final String USB_NEAR_IFACE_ADDR = "192.168.42.129";
+ private static final int USB_PREFIX_LENGTH = 24;
+
+ // USB is 192.168.42.1 and 255.255.255.0
+ // Wifi is 192.168.43.1 and 255.255.255.0
+ // BT is limited to max default of 5 connections. 192.168.44.1 to 192.168.48.1
+ // with 255.255.255.0
+
+ private String[] mDhcpRange;
+ private static final String[] DHCP_DEFAULT_RANGE = {
+ "192.168.42.2", "192.168.42.254", "192.168.43.2", "192.168.43.254",
+ "192.168.44.2", "192.168.44.254", "192.168.45.2", "192.168.45.254",
+ "192.168.46.2", "192.168.46.254", "192.168.47.2", "192.168.47.254",
+ "192.168.48.2", "192.168.48.254",
+ };
+
+ private String[] mDefaultDnsServers;
+ private static final String DNS_DEFAULT_SERVER1 = "8.8.8.8";
+ private static final String DNS_DEFAULT_SERVER2 = "8.8.4.4";
+
+ private StateMachine mTetherMasterSM;
+
+ private Notification mTetheredNotification;
+
+ private boolean mRndisEnabled; // track the RNDIS function enabled state
+ private boolean mUsbTetherRequested; // true if USB tethering should be started
+ // when RNDIS is enabled
+
+ public Tethering(Context context, INetworkManagementService nmService,
+ INetworkStatsService statsService, IConnectivityManager connService, Looper looper) {
+ mContext = context;
+ mNMService = nmService;
+ mStatsService = statsService;
+ mConnService = connService;
+ mLooper = looper;
+
+ mPublicSync = new Object();
+
+ mIfaces = new HashMap<String, TetherInterfaceSM>();
+
+ // make our own thread so we don't anr the system
+ mLooper = IoThread.get().getLooper();
+ mTetherMasterSM = new TetherMasterSM("TetherMaster", mLooper);
+ mTetherMasterSM.start();
+
+ mStateReceiver = new StateReceiver();
+ IntentFilter filter = new IntentFilter();
+ filter.addAction(UsbManager.ACTION_USB_STATE);
+ filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
+ filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED);
+ mContext.registerReceiver(mStateReceiver, filter);
+
+ filter = new IntentFilter();
+ filter.addAction(Intent.ACTION_MEDIA_SHARED);
+ filter.addAction(Intent.ACTION_MEDIA_UNSHARED);
+ filter.addDataScheme("file");
+ mContext.registerReceiver(mStateReceiver, filter);
+
+ mDhcpRange = context.getResources().getStringArray(
+ com.android.internal.R.array.config_tether_dhcp_range);
+ if ((mDhcpRange.length == 0) || (mDhcpRange.length % 2 ==1)) {
+ mDhcpRange = DHCP_DEFAULT_RANGE;
+ }
+
+ // load device config info
+ updateConfiguration();
+
+ // TODO - remove and rely on real notifications of the current iface
+ mDefaultDnsServers = new String[2];
+ mDefaultDnsServers[0] = DNS_DEFAULT_SERVER1;
+ mDefaultDnsServers[1] = DNS_DEFAULT_SERVER2;
+ }
+
+ void updateConfiguration() {
+ String[] tetherableUsbRegexs = mContext.getResources().getStringArray(
+ com.android.internal.R.array.config_tether_usb_regexs);
+ String[] tetherableWifiRegexs = mContext.getResources().getStringArray(
+ com.android.internal.R.array.config_tether_wifi_regexs);
+ String[] tetherableBluetoothRegexs = mContext.getResources().getStringArray(
+ com.android.internal.R.array.config_tether_bluetooth_regexs);
+
+ int ifaceTypes[] = mContext.getResources().getIntArray(
+ com.android.internal.R.array.config_tether_upstream_types);
+ Collection<Integer> upstreamIfaceTypes = new ArrayList();
+ for (int i : ifaceTypes) {
+ upstreamIfaceTypes.add(new Integer(i));
+ }
+
+ synchronized (mPublicSync) {
+ mTetherableUsbRegexs = tetherableUsbRegexs;
+ mTetherableWifiRegexs = tetherableWifiRegexs;
+ mTetherableBluetoothRegexs = tetherableBluetoothRegexs;
+ mUpstreamIfaceTypes = upstreamIfaceTypes;
+ }
+
+ // check if the upstream type list needs to be modified due to secure-settings
+ checkDunRequired();
+ }
+
+ public void interfaceStatusChanged(String iface, boolean up) {
+ if (VDBG) Log.d(TAG, "interfaceStatusChanged " + iface + ", " + up);
+ boolean found = false;
+ boolean usb = false;
+ synchronized (mPublicSync) {
+ if (isWifi(iface)) {
+ found = true;
+ } else if (isUsb(iface)) {
+ found = true;
+ usb = true;
+ } else if (isBluetooth(iface)) {
+ found = true;
+ }
+ if (found == false) return;
+
+ TetherInterfaceSM sm = mIfaces.get(iface);
+ if (up) {
+ if (sm == null) {
+ sm = new TetherInterfaceSM(iface, mLooper, usb);
+ mIfaces.put(iface, sm);
+ sm.start();
+ }
+ } else {
+ if (isUsb(iface)) {
+ // ignore usb0 down after enabling RNDIS
+ // we will handle disconnect in interfaceRemoved instead
+ if (VDBG) Log.d(TAG, "ignore interface down for " + iface);
+ } else if (sm != null) {
+ sm.sendMessage(TetherInterfaceSM.CMD_INTERFACE_DOWN);
+ mIfaces.remove(iface);
+ }
+ }
+ }
+ }
+
+ public void interfaceLinkStateChanged(String iface, boolean up) {
+ if (VDBG) Log.d(TAG, "interfaceLinkStateChanged " + iface + ", " + up);
+ interfaceStatusChanged(iface, up);
+ }
+
+ private boolean isUsb(String iface) {
+ synchronized (mPublicSync) {
+ for (String regex : mTetherableUsbRegexs) {
+ if (iface.matches(regex)) return true;
+ }
+ return false;
+ }
+ }
+
+ public boolean isWifi(String iface) {
+ synchronized (mPublicSync) {
+ for (String regex : mTetherableWifiRegexs) {
+ if (iface.matches(regex)) return true;
+ }
+ return false;
+ }
+ }
+
+ public boolean isBluetooth(String iface) {
+ synchronized (mPublicSync) {
+ for (String regex : mTetherableBluetoothRegexs) {
+ if (iface.matches(regex)) return true;
+ }
+ return false;
+ }
+ }
+
+ public void interfaceAdded(String iface) {
+ if (VDBG) Log.d(TAG, "interfaceAdded " + iface);
+ boolean found = false;
+ boolean usb = false;
+ synchronized (mPublicSync) {
+ if (isWifi(iface)) {
+ found = true;
+ }
+ if (isUsb(iface)) {
+ found = true;
+ usb = true;
+ }
+ if (isBluetooth(iface)) {
+ found = true;
+ }
+ if (found == false) {
+ if (VDBG) Log.d(TAG, iface + " is not a tetherable iface, ignoring");
+ return;
+ }
+
+ TetherInterfaceSM sm = mIfaces.get(iface);
+ if (sm != null) {
+ if (VDBG) Log.d(TAG, "active iface (" + iface + ") reported as added, ignoring");
+ return;
+ }
+ sm = new TetherInterfaceSM(iface, mLooper, usb);
+ mIfaces.put(iface, sm);
+ sm.start();
+ }
+ }
+
+ public void interfaceRemoved(String iface) {
+ if (VDBG) Log.d(TAG, "interfaceRemoved " + iface);
+ synchronized (mPublicSync) {
+ TetherInterfaceSM sm = mIfaces.get(iface);
+ if (sm == null) {
+ if (VDBG) {
+ Log.e(TAG, "attempting to remove unknown iface (" + iface + "), ignoring");
+ }
+ return;
+ }
+ sm.sendMessage(TetherInterfaceSM.CMD_INTERFACE_DOWN);
+ mIfaces.remove(iface);
+ }
+ }
+
+ public int tether(String iface) {
+ if (DBG) Log.d(TAG, "Tethering " + iface);
+ TetherInterfaceSM sm = null;
+ synchronized (mPublicSync) {
+ sm = mIfaces.get(iface);
+ }
+ if (sm == null) {
+ Log.e(TAG, "Tried to Tether an unknown iface :" + iface + ", ignoring");
+ return ConnectivityManager.TETHER_ERROR_UNKNOWN_IFACE;
+ }
+ if (!sm.isAvailable() && !sm.isErrored()) {
+ Log.e(TAG, "Tried to Tether an unavailable iface :" + iface + ", ignoring");
+ return ConnectivityManager.TETHER_ERROR_UNAVAIL_IFACE;
+ }
+ sm.sendMessage(TetherInterfaceSM.CMD_TETHER_REQUESTED);
+ return ConnectivityManager.TETHER_ERROR_NO_ERROR;
+ }
+
+ public int untether(String iface) {
+ if (DBG) Log.d(TAG, "Untethering " + iface);
+ TetherInterfaceSM sm = null;
+ synchronized (mPublicSync) {
+ sm = mIfaces.get(iface);
+ }
+ if (sm == null) {
+ Log.e(TAG, "Tried to Untether an unknown iface :" + iface + ", ignoring");
+ return ConnectivityManager.TETHER_ERROR_UNKNOWN_IFACE;
+ }
+ if (sm.isErrored()) {
+ Log.e(TAG, "Tried to Untethered an errored iface :" + iface + ", ignoring");
+ return ConnectivityManager.TETHER_ERROR_UNAVAIL_IFACE;
+ }
+ sm.sendMessage(TetherInterfaceSM.CMD_TETHER_UNREQUESTED);
+ return ConnectivityManager.TETHER_ERROR_NO_ERROR;
+ }
+
+ public int getLastTetherError(String iface) {
+ TetherInterfaceSM sm = null;
+ synchronized (mPublicSync) {
+ sm = mIfaces.get(iface);
+ if (sm == null) {
+ Log.e(TAG, "Tried to getLastTetherError on an unknown iface :" + iface +
+ ", ignoring");
+ return ConnectivityManager.TETHER_ERROR_UNKNOWN_IFACE;
+ }
+ return sm.getLastError();
+ }
+ }
+
+ // TODO - move all private methods used only by the state machine into the state machine
+ // to clarify what needs synchronized protection.
+ private void sendTetherStateChangedBroadcast() {
+ try {
+ if (!mConnService.isTetheringSupported()) return;
+ } catch (RemoteException e) {
+ return;
+ }
+
+ ArrayList<String> availableList = new ArrayList<String>();
+ ArrayList<String> activeList = new ArrayList<String>();
+ ArrayList<String> erroredList = new ArrayList<String>();
+
+ boolean wifiTethered = false;
+ boolean usbTethered = false;
+ boolean bluetoothTethered = false;
+
+ synchronized (mPublicSync) {
+ Set ifaces = mIfaces.keySet();
+ for (Object iface : ifaces) {
+ TetherInterfaceSM sm = mIfaces.get(iface);
+ if (sm != null) {
+ if (sm.isErrored()) {
+ erroredList.add((String)iface);
+ } else if (sm.isAvailable()) {
+ availableList.add((String)iface);
+ } else if (sm.isTethered()) {
+ if (isUsb((String)iface)) {
+ usbTethered = true;
+ } else if (isWifi((String)iface)) {
+ wifiTethered = true;
+ } else if (isBluetooth((String)iface)) {
+ bluetoothTethered = true;
+ }
+ activeList.add((String)iface);
+ }
+ }
+ }
+ }
+ Intent broadcast = new Intent(ConnectivityManager.ACTION_TETHER_STATE_CHANGED);
+ broadcast.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING |
+ Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
+ broadcast.putStringArrayListExtra(ConnectivityManager.EXTRA_AVAILABLE_TETHER,
+ availableList);
+ broadcast.putStringArrayListExtra(ConnectivityManager.EXTRA_ACTIVE_TETHER, activeList);
+ broadcast.putStringArrayListExtra(ConnectivityManager.EXTRA_ERRORED_TETHER,
+ erroredList);
+ mContext.sendStickyBroadcastAsUser(broadcast, UserHandle.ALL);
+ if (DBG) {
+ Log.d(TAG, "sendTetherStateChangedBroadcast " + availableList.size() + ", " +
+ activeList.size() + ", " + erroredList.size());
+ }
+
+ if (usbTethered) {
+ if (wifiTethered || bluetoothTethered) {
+ showTetheredNotification(com.android.internal.R.drawable.stat_sys_tether_general);
+ } else {
+ showTetheredNotification(com.android.internal.R.drawable.stat_sys_tether_usb);
+ }
+ } else if (wifiTethered) {
+ if (bluetoothTethered) {
+ showTetheredNotification(com.android.internal.R.drawable.stat_sys_tether_general);
+ } else {
+ showTetheredNotification(com.android.internal.R.drawable.stat_sys_tether_wifi);
+ }
+ } else if (bluetoothTethered) {
+ showTetheredNotification(com.android.internal.R.drawable.stat_sys_tether_bluetooth);
+ } else {
+ clearTetheredNotification();
+ }
+ }
+
+ private void showTetheredNotification(int icon) {
+ NotificationManager notificationManager =
+ (NotificationManager)mContext.getSystemService(Context.NOTIFICATION_SERVICE);
+ if (notificationManager == null) {
+ return;
+ }
+
+ if (mTetheredNotification != null) {
+ if (mTetheredNotification.icon == icon) {
+ return;
+ }
+ notificationManager.cancelAsUser(null, mTetheredNotification.icon,
+ UserHandle.ALL);
+ }
+
+ Intent intent = new Intent();
+ intent.setClassName("com.android.settings", "com.android.settings.TetherSettings");
+ intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
+
+ PendingIntent pi = PendingIntent.getActivityAsUser(mContext, 0, intent, 0,
+ null, UserHandle.CURRENT);
+
+ Resources r = Resources.getSystem();
+ CharSequence title = r.getText(com.android.internal.R.string.tethered_notification_title);
+ CharSequence message = r.getText(com.android.internal.R.string.
+ tethered_notification_message);
+
+ if (mTetheredNotification == null) {
+ mTetheredNotification = new Notification();
+ mTetheredNotification.when = 0;
+ }
+ mTetheredNotification.icon = icon;
+ mTetheredNotification.defaults &= ~Notification.DEFAULT_SOUND;
+ mTetheredNotification.flags = Notification.FLAG_ONGOING_EVENT;
+ mTetheredNotification.tickerText = title;
+ mTetheredNotification.setLatestEventInfo(mContext, title, message, pi);
+
+ notificationManager.notifyAsUser(null, mTetheredNotification.icon,
+ mTetheredNotification, UserHandle.ALL);
+ }
+
+ private void clearTetheredNotification() {
+ NotificationManager notificationManager =
+ (NotificationManager)mContext.getSystemService(Context.NOTIFICATION_SERVICE);
+ if (notificationManager != null && mTetheredNotification != null) {
+ notificationManager.cancelAsUser(null, mTetheredNotification.icon,
+ UserHandle.ALL);
+ mTetheredNotification = null;
+ }
+ }
+
+ private class StateReceiver extends BroadcastReceiver {
+ public void onReceive(Context content, Intent intent) {
+ String action = intent.getAction();
+ if (action.equals(UsbManager.ACTION_USB_STATE)) {
+ synchronized (Tethering.this.mPublicSync) {
+ boolean usbConnected = intent.getBooleanExtra(UsbManager.USB_CONNECTED, false);
+ mRndisEnabled = intent.getBooleanExtra(UsbManager.USB_FUNCTION_RNDIS, false);
+ // start tethering if we have a request pending
+ if (usbConnected && mRndisEnabled && mUsbTetherRequested) {
+ tetherUsb(true);
+ }
+ mUsbTetherRequested = false;
+ }
+ } else if (action.equals(ConnectivityManager.CONNECTIVITY_ACTION)) {
+ NetworkInfo networkInfo = (NetworkInfo)intent.getParcelableExtra(
+ ConnectivityManager.EXTRA_NETWORK_INFO);
+ if (networkInfo != null &&
+ networkInfo.getDetailedState() != NetworkInfo.DetailedState.FAILED) {
+ if (VDBG) Log.d(TAG, "Tethering got CONNECTIVITY_ACTION");
+ mTetherMasterSM.sendMessage(TetherMasterSM.CMD_UPSTREAM_CHANGED);
+ }
+ } else if (action.equals(Intent.ACTION_CONFIGURATION_CHANGED)) {
+ updateConfiguration();
+ }
+ }
+ }
+
+ private void tetherUsb(boolean enable) {
+ if (VDBG) Log.d(TAG, "tetherUsb " + enable);
+
+ String[] ifaces = new String[0];
+ try {
+ ifaces = mNMService.listInterfaces();
+ } catch (Exception e) {
+ Log.e(TAG, "Error listing Interfaces", e);
+ return;
+ }
+ for (String iface : ifaces) {
+ if (isUsb(iface)) {
+ int result = (enable ? tether(iface) : untether(iface));
+ if (result == ConnectivityManager.TETHER_ERROR_NO_ERROR) {
+ return;
+ }
+ }
+ }
+ Log.e(TAG, "unable start or stop USB tethering");
+ }
+
+ // configured when we start tethering and unconfig'd on error or conclusion
+ private boolean configureUsbIface(boolean enabled) {
+ if (VDBG) Log.d(TAG, "configureUsbIface(" + enabled + ")");
+
+ // toggle the USB interfaces
+ String[] ifaces = new String[0];
+ try {
+ ifaces = mNMService.listInterfaces();
+ } catch (Exception e) {
+ Log.e(TAG, "Error listing Interfaces", e);
+ return false;
+ }
+ for (String iface : ifaces) {
+ if (isUsb(iface)) {
+ InterfaceConfiguration ifcg = null;
+ try {
+ ifcg = mNMService.getInterfaceConfig(iface);
+ if (ifcg != null) {
+ InetAddress addr = NetworkUtils.numericToInetAddress(USB_NEAR_IFACE_ADDR);
+ ifcg.setLinkAddress(new LinkAddress(addr, USB_PREFIX_LENGTH));
+ if (enabled) {
+ ifcg.setInterfaceUp();
+ } else {
+ ifcg.setInterfaceDown();
+ }
+ ifcg.clearFlag("running");
+ mNMService.setInterfaceConfig(iface, ifcg);
+ }
+ } catch (Exception e) {
+ Log.e(TAG, "Error configuring interface " + iface, e);
+ return false;
+ }
+ }
+ }
+
+ return true;
+ }
+
+ // TODO - return copies so people can't tamper
+ public String[] getTetherableUsbRegexs() {
+ return mTetherableUsbRegexs;
+ }
+
+ public String[] getTetherableWifiRegexs() {
+ return mTetherableWifiRegexs;
+ }
+
+ public String[] getTetherableBluetoothRegexs() {
+ return mTetherableBluetoothRegexs;
+ }
+
+ public int setUsbTethering(boolean enable) {
+ if (VDBG) Log.d(TAG, "setUsbTethering(" + enable + ")");
+ UsbManager usbManager = (UsbManager)mContext.getSystemService(Context.USB_SERVICE);
+
+ synchronized (mPublicSync) {
+ if (enable) {
+ if (mRndisEnabled) {
+ tetherUsb(true);
+ } else {
+ mUsbTetherRequested = true;
+ usbManager.setCurrentFunction(UsbManager.USB_FUNCTION_RNDIS, false);
+ }
+ } else {
+ tetherUsb(false);
+ if (mRndisEnabled) {
+ usbManager.setCurrentFunction(null, false);
+ }
+ mUsbTetherRequested = false;
+ }
+ }
+ return ConnectivityManager.TETHER_ERROR_NO_ERROR;
+ }
+
+ public int[] getUpstreamIfaceTypes() {
+ int values[];
+ synchronized (mPublicSync) {
+ updateConfiguration(); // TODO - remove?
+ values = new int[mUpstreamIfaceTypes.size()];
+ Iterator<Integer> iterator = mUpstreamIfaceTypes.iterator();
+ for (int i=0; i < mUpstreamIfaceTypes.size(); i++) {
+ values[i] = iterator.next();
+ }
+ }
+ return values;
+ }
+
+ public void checkDunRequired() {
+ int secureSetting = Settings.Global.getInt(mContext.getContentResolver(),
+ Settings.Global.TETHER_DUN_REQUIRED, 2);
+ synchronized (mPublicSync) {
+ // 2 = not set, 0 = DUN not required, 1 = DUN required
+ if (secureSetting != 2) {
+ int requiredApn = (secureSetting == 1 ?
+ ConnectivityManager.TYPE_MOBILE_DUN :
+ ConnectivityManager.TYPE_MOBILE_HIPRI);
+ if (requiredApn == ConnectivityManager.TYPE_MOBILE_DUN) {
+ while (mUpstreamIfaceTypes.contains(MOBILE_TYPE)) {
+ mUpstreamIfaceTypes.remove(MOBILE_TYPE);
+ }
+ while (mUpstreamIfaceTypes.contains(HIPRI_TYPE)) {
+ mUpstreamIfaceTypes.remove(HIPRI_TYPE);
+ }
+ if (mUpstreamIfaceTypes.contains(DUN_TYPE) == false) {
+ mUpstreamIfaceTypes.add(DUN_TYPE);
+ }
+ } else {
+ while (mUpstreamIfaceTypes.contains(DUN_TYPE)) {
+ mUpstreamIfaceTypes.remove(DUN_TYPE);
+ }
+ if (mUpstreamIfaceTypes.contains(MOBILE_TYPE) == false) {
+ mUpstreamIfaceTypes.add(MOBILE_TYPE);
+ }
+ if (mUpstreamIfaceTypes.contains(HIPRI_TYPE) == false) {
+ mUpstreamIfaceTypes.add(HIPRI_TYPE);
+ }
+ }
+ }
+ if (mUpstreamIfaceTypes.contains(DUN_TYPE)) {
+ mPreferredUpstreamMobileApn = ConnectivityManager.TYPE_MOBILE_DUN;
+ } else {
+ mPreferredUpstreamMobileApn = ConnectivityManager.TYPE_MOBILE_HIPRI;
+ }
+ }
+ }
+
+ // TODO review API - maybe return ArrayList<String> here and below?
+ public String[] getTetheredIfaces() {
+ ArrayList<String> list = new ArrayList<String>();
+ synchronized (mPublicSync) {
+ Set keys = mIfaces.keySet();
+ for (Object key : keys) {
+ TetherInterfaceSM sm = mIfaces.get(key);
+ if (sm.isTethered()) {
+ list.add((String)key);
+ }
+ }
+ }
+ String[] retVal = new String[list.size()];
+ for (int i=0; i < list.size(); i++) {
+ retVal[i] = list.get(i);
+ }
+ return retVal;
+ }
+
+ public String[] getTetherableIfaces() {
+ ArrayList<String> list = new ArrayList<String>();
+ synchronized (mPublicSync) {
+ Set keys = mIfaces.keySet();
+ for (Object key : keys) {
+ TetherInterfaceSM sm = mIfaces.get(key);
+ if (sm.isAvailable()) {
+ list.add((String)key);
+ }
+ }
+ }
+ String[] retVal = new String[list.size()];
+ for (int i=0; i < list.size(); i++) {
+ retVal[i] = list.get(i);
+ }
+ return retVal;
+ }
+
+ public String[] getErroredIfaces() {
+ ArrayList<String> list = new ArrayList<String>();
+ synchronized (mPublicSync) {
+ Set keys = mIfaces.keySet();
+ for (Object key : keys) {
+ TetherInterfaceSM sm = mIfaces.get(key);
+ if (sm.isErrored()) {
+ list.add((String)key);
+ }
+ }
+ }
+ String[] retVal = new String[list.size()];
+ for (int i= 0; i< list.size(); i++) {
+ retVal[i] = list.get(i);
+ }
+ return retVal;
+ }
+
+ //TODO: Temporary handling upstream change triggered without
+ // CONNECTIVITY_ACTION. Only to accomodate interface
+ // switch during HO.
+ // @see bug/4455071
+ public void handleTetherIfaceChange() {
+ mTetherMasterSM.sendMessage(TetherMasterSM.CMD_UPSTREAM_CHANGED);
+ }
+
+ class TetherInterfaceSM extends StateMachine {
+ // notification from the master SM that it's not in tether mode
+ static final int CMD_TETHER_MODE_DEAD = 1;
+ // request from the user that it wants to tether
+ static final int CMD_TETHER_REQUESTED = 2;
+ // request from the user that it wants to untether
+ static final int CMD_TETHER_UNREQUESTED = 3;
+ // notification that this interface is down
+ static final int CMD_INTERFACE_DOWN = 4;
+ // notification that this interface is up
+ static final int CMD_INTERFACE_UP = 5;
+ // notification from the master SM that it had an error turning on cellular dun
+ static final int CMD_CELL_DUN_ERROR = 6;
+ // notification from the master SM that it had trouble enabling IP Forwarding
+ static final int CMD_IP_FORWARDING_ENABLE_ERROR = 7;
+ // notification from the master SM that it had trouble disabling IP Forwarding
+ static final int CMD_IP_FORWARDING_DISABLE_ERROR = 8;
+ // notification from the master SM that it had trouble staring tethering
+ static final int CMD_START_TETHERING_ERROR = 9;
+ // notification from the master SM that it had trouble stopping tethering
+ static final int CMD_STOP_TETHERING_ERROR = 10;
+ // notification from the master SM that it had trouble setting the DNS forwarders
+ static final int CMD_SET_DNS_FORWARDERS_ERROR = 11;
+ // the upstream connection has changed
+ static final int CMD_TETHER_CONNECTION_CHANGED = 12;
+
+ private State mDefaultState;
+
+ private State mInitialState;
+ private State mStartingState;
+ private State mTetheredState;
+
+ private State mUnavailableState;
+
+ private boolean mAvailable;
+ private boolean mTethered;
+ int mLastError;
+
+ String mIfaceName;
+ String mMyUpstreamIfaceName; // may change over time
+
+ boolean mUsb;
+
+ TetherInterfaceSM(String name, Looper looper, boolean usb) {
+ super(name, looper);
+ mIfaceName = name;
+ mUsb = usb;
+ setLastError(ConnectivityManager.TETHER_ERROR_NO_ERROR);
+
+ mInitialState = new InitialState();
+ addState(mInitialState);
+ mStartingState = new StartingState();
+ addState(mStartingState);
+ mTetheredState = new TetheredState();
+ addState(mTetheredState);
+ mUnavailableState = new UnavailableState();
+ addState(mUnavailableState);
+
+ setInitialState(mInitialState);
+ }
+
+ public String toString() {
+ String res = new String();
+ res += mIfaceName + " - ";
+ IState current = getCurrentState();
+ if (current == mInitialState) res += "InitialState";
+ if (current == mStartingState) res += "StartingState";
+ if (current == mTetheredState) res += "TetheredState";
+ if (current == mUnavailableState) res += "UnavailableState";
+ if (mAvailable) res += " - Available";
+ if (mTethered) res += " - Tethered";
+ res += " - lastError =" + mLastError;
+ return res;
+ }
+
+ public int getLastError() {
+ synchronized (Tethering.this.mPublicSync) {
+ return mLastError;
+ }
+ }
+
+ private void setLastError(int error) {
+ synchronized (Tethering.this.mPublicSync) {
+ mLastError = error;
+
+ if (isErrored()) {
+ if (mUsb) {
+ // note everything's been unwound by this point so nothing to do on
+ // further error..
+ Tethering.this.configureUsbIface(false);
+ }
+ }
+ }
+ }
+
+ public boolean isAvailable() {
+ synchronized (Tethering.this.mPublicSync) {
+ return mAvailable;
+ }
+ }
+
+ private void setAvailable(boolean available) {
+ synchronized (Tethering.this.mPublicSync) {
+ mAvailable = available;
+ }
+ }
+
+ public boolean isTethered() {
+ synchronized (Tethering.this.mPublicSync) {
+ return mTethered;
+ }
+ }
+
+ private void setTethered(boolean tethered) {
+ synchronized (Tethering.this.mPublicSync) {
+ mTethered = tethered;
+ }
+ }
+
+ public boolean isErrored() {
+ synchronized (Tethering.this.mPublicSync) {
+ return (mLastError != ConnectivityManager.TETHER_ERROR_NO_ERROR);
+ }
+ }
+
+ class InitialState extends State {
+ @Override
+ public void enter() {
+ setAvailable(true);
+ setTethered(false);
+ sendTetherStateChangedBroadcast();
+ }
+
+ @Override
+ public boolean processMessage(Message message) {
+ if (DBG) Log.d(TAG, "InitialState.processMessage what=" + message.what);
+ boolean retValue = true;
+ switch (message.what) {
+ case CMD_TETHER_REQUESTED:
+ setLastError(ConnectivityManager.TETHER_ERROR_NO_ERROR);
+ mTetherMasterSM.sendMessage(TetherMasterSM.CMD_TETHER_MODE_REQUESTED,
+ TetherInterfaceSM.this);
+ transitionTo(mStartingState);
+ break;
+ case CMD_INTERFACE_DOWN:
+ transitionTo(mUnavailableState);
+ break;
+ default:
+ retValue = false;
+ break;
+ }
+ return retValue;
+ }
+ }
+
+ class StartingState extends State {
+ @Override
+ public void enter() {
+ setAvailable(false);
+ if (mUsb) {
+ if (!Tethering.this.configureUsbIface(true)) {
+ mTetherMasterSM.sendMessage(TetherMasterSM.CMD_TETHER_MODE_UNREQUESTED,
+ TetherInterfaceSM.this);
+ setLastError(ConnectivityManager.TETHER_ERROR_IFACE_CFG_ERROR);
+
+ transitionTo(mInitialState);
+ return;
+ }
+ }
+ sendTetherStateChangedBroadcast();
+
+ // Skipping StartingState
+ transitionTo(mTetheredState);
+ }
+ @Override
+ public boolean processMessage(Message message) {
+ if (DBG) Log.d(TAG, "StartingState.processMessage what=" + message.what);
+ boolean retValue = true;
+ switch (message.what) {
+ // maybe a parent class?
+ case CMD_TETHER_UNREQUESTED:
+ mTetherMasterSM.sendMessage(TetherMasterSM.CMD_TETHER_MODE_UNREQUESTED,
+ TetherInterfaceSM.this);
+ if (mUsb) {
+ if (!Tethering.this.configureUsbIface(false)) {
+ setLastErrorAndTransitionToInitialState(
+ ConnectivityManager.TETHER_ERROR_IFACE_CFG_ERROR);
+ break;
+ }
+ }
+ transitionTo(mInitialState);
+ break;
+ case CMD_CELL_DUN_ERROR:
+ case CMD_IP_FORWARDING_ENABLE_ERROR:
+ case CMD_IP_FORWARDING_DISABLE_ERROR:
+ case CMD_START_TETHERING_ERROR:
+ case CMD_STOP_TETHERING_ERROR:
+ case CMD_SET_DNS_FORWARDERS_ERROR:
+ setLastErrorAndTransitionToInitialState(
+ ConnectivityManager.TETHER_ERROR_MASTER_ERROR);
+ break;
+ case CMD_INTERFACE_DOWN:
+ mTetherMasterSM.sendMessage(TetherMasterSM.CMD_TETHER_MODE_UNREQUESTED,
+ TetherInterfaceSM.this);
+ transitionTo(mUnavailableState);
+ break;
+ default:
+ retValue = false;
+ }
+ return retValue;
+ }
+ }
+
+ class TetheredState extends State {
+ @Override
+ public void enter() {
+ try {
+ mNMService.tetherInterface(mIfaceName);
+ } catch (Exception e) {
+ Log.e(TAG, "Error Tethering: " + e.toString());
+ setLastError(ConnectivityManager.TETHER_ERROR_TETHER_IFACE_ERROR);
+
+ transitionTo(mInitialState);
+ return;
+ }
+ if (DBG) Log.d(TAG, "Tethered " + mIfaceName);
+ setAvailable(false);
+ setTethered(true);
+ sendTetherStateChangedBroadcast();
+ }
+
+ private void cleanupUpstream() {
+ if (mMyUpstreamIfaceName != null) {
+ // note that we don't care about errors here.
+ // sometimes interfaces are gone before we get
+ // to remove their rules, which generates errors.
+ // just do the best we can.
+ try {
+ // about to tear down NAT; gather remaining statistics
+ mStatsService.forceUpdate();
+ } catch (Exception e) {
+ if (VDBG) Log.e(TAG, "Exception in forceUpdate: " + e.toString());
+ }
+ try {
+ mNMService.disableNat(mIfaceName, mMyUpstreamIfaceName);
+ } catch (Exception e) {
+ if (VDBG) Log.e(TAG, "Exception in disableNat: " + e.toString());
+ }
+ mMyUpstreamIfaceName = null;
+ }
+ return;
+ }
+
+ @Override
+ public boolean processMessage(Message message) {
+ if (DBG) Log.d(TAG, "TetheredState.processMessage what=" + message.what);
+ boolean retValue = true;
+ boolean error = false;
+ switch (message.what) {
+ case CMD_TETHER_UNREQUESTED:
+ case CMD_INTERFACE_DOWN:
+ cleanupUpstream();
+ try {
+ mNMService.untetherInterface(mIfaceName);
+ } catch (Exception e) {
+ setLastErrorAndTransitionToInitialState(
+ ConnectivityManager.TETHER_ERROR_UNTETHER_IFACE_ERROR);
+ break;
+ }
+ mTetherMasterSM.sendMessage(TetherMasterSM.CMD_TETHER_MODE_UNREQUESTED,
+ TetherInterfaceSM.this);
+ if (message.what == CMD_TETHER_UNREQUESTED) {
+ if (mUsb) {
+ if (!Tethering.this.configureUsbIface(false)) {
+ setLastError(
+ ConnectivityManager.TETHER_ERROR_IFACE_CFG_ERROR);
+ }
+ }
+ transitionTo(mInitialState);
+ } else if (message.what == CMD_INTERFACE_DOWN) {
+ transitionTo(mUnavailableState);
+ }
+ if (DBG) Log.d(TAG, "Untethered " + mIfaceName);
+ break;
+ case CMD_TETHER_CONNECTION_CHANGED:
+ String newUpstreamIfaceName = (String)(message.obj);
+ if ((mMyUpstreamIfaceName == null && newUpstreamIfaceName == null) ||
+ (mMyUpstreamIfaceName != null &&
+ mMyUpstreamIfaceName.equals(newUpstreamIfaceName))) {
+ if (VDBG) Log.d(TAG, "Connection changed noop - dropping");
+ break;
+ }
+ cleanupUpstream();
+ if (newUpstreamIfaceName != null) {
+ try {
+ mNMService.enableNat(mIfaceName, newUpstreamIfaceName);
+ } catch (Exception e) {
+ Log.e(TAG, "Exception enabling Nat: " + e.toString());
+ try {
+ mNMService.untetherInterface(mIfaceName);
+ } catch (Exception ee) {}
+
+ setLastError(ConnectivityManager.TETHER_ERROR_ENABLE_NAT_ERROR);
+ transitionTo(mInitialState);
+ return true;
+ }
+ }
+ mMyUpstreamIfaceName = newUpstreamIfaceName;
+ break;
+ case CMD_CELL_DUN_ERROR:
+ case CMD_IP_FORWARDING_ENABLE_ERROR:
+ case CMD_IP_FORWARDING_DISABLE_ERROR:
+ case CMD_START_TETHERING_ERROR:
+ case CMD_STOP_TETHERING_ERROR:
+ case CMD_SET_DNS_FORWARDERS_ERROR:
+ error = true;
+ // fall through
+ case CMD_TETHER_MODE_DEAD:
+ cleanupUpstream();
+ try {
+ mNMService.untetherInterface(mIfaceName);
+ } catch (Exception e) {
+ setLastErrorAndTransitionToInitialState(
+ ConnectivityManager.TETHER_ERROR_UNTETHER_IFACE_ERROR);
+ break;
+ }
+ if (error) {
+ setLastErrorAndTransitionToInitialState(
+ ConnectivityManager.TETHER_ERROR_MASTER_ERROR);
+ break;
+ }
+ if (DBG) Log.d(TAG, "Tether lost upstream connection " + mIfaceName);
+ sendTetherStateChangedBroadcast();
+ if (mUsb) {
+ if (!Tethering.this.configureUsbIface(false)) {
+ setLastError(ConnectivityManager.TETHER_ERROR_IFACE_CFG_ERROR);
+ }
+ }
+ transitionTo(mInitialState);
+ break;
+ default:
+ retValue = false;
+ break;
+ }
+ return retValue;
+ }
+ }
+
+ class UnavailableState extends State {
+ @Override
+ public void enter() {
+ setAvailable(false);
+ setLastError(ConnectivityManager.TETHER_ERROR_NO_ERROR);
+ setTethered(false);
+ sendTetherStateChangedBroadcast();
+ }
+ @Override
+ public boolean processMessage(Message message) {
+ boolean retValue = true;
+ switch (message.what) {
+ case CMD_INTERFACE_UP:
+ transitionTo(mInitialState);
+ break;
+ default:
+ retValue = false;
+ break;
+ }
+ return retValue;
+ }
+ }
+
+ void setLastErrorAndTransitionToInitialState(int error) {
+ setLastError(error);
+ transitionTo(mInitialState);
+ }
+
+ }
+
+ class TetherMasterSM extends StateMachine {
+ // an interface SM has requested Tethering
+ static final int CMD_TETHER_MODE_REQUESTED = 1;
+ // an interface SM has unrequested Tethering
+ static final int CMD_TETHER_MODE_UNREQUESTED = 2;
+ // upstream connection change - do the right thing
+ static final int CMD_UPSTREAM_CHANGED = 3;
+ // we received notice that the cellular DUN connection is up
+ static final int CMD_CELL_CONNECTION_RENEW = 4;
+ // we don't have a valid upstream conn, check again after a delay
+ static final int CMD_RETRY_UPSTREAM = 5;
+
+ // This indicates what a timeout event relates to. A state that
+ // sends itself a delayed timeout event and handles incoming timeout events
+ // should inc this when it is entered and whenever it sends a new timeout event.
+ // We do not flush the old ones.
+ private int mSequenceNumber;
+
+ private State mInitialState;
+ private State mTetherModeAliveState;
+
+ private State mSetIpForwardingEnabledErrorState;
+ private State mSetIpForwardingDisabledErrorState;
+ private State mStartTetheringErrorState;
+ private State mStopTetheringErrorState;
+ private State mSetDnsForwardersErrorState;
+
+ private ArrayList<TetherInterfaceSM> mNotifyList;
+
+ private int mCurrentConnectionSequence;
+ private int mMobileApnReserved = ConnectivityManager.TYPE_NONE;
+
+ private String mUpstreamIfaceName = null;
+
+ private static final int UPSTREAM_SETTLE_TIME_MS = 10000;
+ private static final int CELL_CONNECTION_RENEW_MS = 40000;
+
+ TetherMasterSM(String name, Looper looper) {
+ super(name, looper);
+
+ //Add states
+ mInitialState = new InitialState();
+ addState(mInitialState);
+ mTetherModeAliveState = new TetherModeAliveState();
+ addState(mTetherModeAliveState);
+
+ mSetIpForwardingEnabledErrorState = new SetIpForwardingEnabledErrorState();
+ addState(mSetIpForwardingEnabledErrorState);
+ mSetIpForwardingDisabledErrorState = new SetIpForwardingDisabledErrorState();
+ addState(mSetIpForwardingDisabledErrorState);
+ mStartTetheringErrorState = new StartTetheringErrorState();
+ addState(mStartTetheringErrorState);
+ mStopTetheringErrorState = new StopTetheringErrorState();
+ addState(mStopTetheringErrorState);
+ mSetDnsForwardersErrorState = new SetDnsForwardersErrorState();
+ addState(mSetDnsForwardersErrorState);
+
+ mNotifyList = new ArrayList<TetherInterfaceSM>();
+ setInitialState(mInitialState);
+ }
+
+ class TetherMasterUtilState extends State {
+ protected final static boolean TRY_TO_SETUP_MOBILE_CONNECTION = true;
+ protected final static boolean WAIT_FOR_NETWORK_TO_SETTLE = false;
+
+ @Override
+ public boolean processMessage(Message m) {
+ return false;
+ }
+ protected String enableString(int apnType) {
+ switch (apnType) {
+ case ConnectivityManager.TYPE_MOBILE_DUN:
+ return Phone.FEATURE_ENABLE_DUN_ALWAYS;
+ case ConnectivityManager.TYPE_MOBILE:
+ case ConnectivityManager.TYPE_MOBILE_HIPRI:
+ return Phone.FEATURE_ENABLE_HIPRI;
+ }
+ return null;
+ }
+ protected boolean turnOnUpstreamMobileConnection(int apnType) {
+ boolean retValue = true;
+ if (apnType == ConnectivityManager.TYPE_NONE) return false;
+ if (apnType != mMobileApnReserved) turnOffUpstreamMobileConnection();
+ int result = PhoneConstants.APN_REQUEST_FAILED;
+ String enableString = enableString(apnType);
+ if (enableString == null) return false;
+ try {
+ result = mConnService.startUsingNetworkFeature(ConnectivityManager.TYPE_MOBILE,
+ enableString, new Binder());
+ } catch (Exception e) {
+ }
+ switch (result) {
+ case PhoneConstants.APN_ALREADY_ACTIVE:
+ case PhoneConstants.APN_REQUEST_STARTED:
+ mMobileApnReserved = apnType;
+ Message m = obtainMessage(CMD_CELL_CONNECTION_RENEW);
+ m.arg1 = ++mCurrentConnectionSequence;
+ sendMessageDelayed(m, CELL_CONNECTION_RENEW_MS);
+ break;
+ case PhoneConstants.APN_REQUEST_FAILED:
+ default:
+ retValue = false;
+ break;
+ }
+
+ return retValue;
+ }
+ protected boolean turnOffUpstreamMobileConnection() {
+ // ignore pending renewal requests
+ ++mCurrentConnectionSequence;
+ if (mMobileApnReserved != ConnectivityManager.TYPE_NONE) {
+ try {
+ mConnService.stopUsingNetworkFeature(ConnectivityManager.TYPE_MOBILE,
+ enableString(mMobileApnReserved));
+ } catch (Exception e) {
+ return false;
+ }
+ mMobileApnReserved = ConnectivityManager.TYPE_NONE;
+ }
+ return true;
+ }
+ protected boolean turnOnMasterTetherSettings() {
+ try {
+ mNMService.setIpForwardingEnabled(true);
+ } catch (Exception e) {
+ transitionTo(mSetIpForwardingEnabledErrorState);
+ return false;
+ }
+ try {
+ mNMService.startTethering(mDhcpRange);
+ } catch (Exception e) {
+ try {
+ mNMService.stopTethering();
+ mNMService.startTethering(mDhcpRange);
+ } catch (Exception ee) {
+ transitionTo(mStartTetheringErrorState);
+ return false;
+ }
+ }
+ try {
+ mNMService.setDnsForwarders(mDefaultDnsServers);
+ } catch (Exception e) {
+ transitionTo(mSetDnsForwardersErrorState);
+ return false;
+ }
+ return true;
+ }
+ protected boolean turnOffMasterTetherSettings() {
+ try {
+ mNMService.stopTethering();
+ } catch (Exception e) {
+ transitionTo(mStopTetheringErrorState);
+ return false;
+ }
+ try {
+ mNMService.setIpForwardingEnabled(false);
+ } catch (Exception e) {
+ transitionTo(mSetIpForwardingDisabledErrorState);
+ return false;
+ }
+ transitionTo(mInitialState);
+ return true;
+ }
+
+ protected void chooseUpstreamType(boolean tryCell) {
+ int upType = ConnectivityManager.TYPE_NONE;
+ String iface = null;
+
+ updateConfiguration(); // TODO - remove?
+
+ synchronized (mPublicSync) {
+ if (VDBG) {
+ Log.d(TAG, "chooseUpstreamType has upstream iface types:");
+ for (Integer netType : mUpstreamIfaceTypes) {
+ Log.d(TAG, " " + netType);
+ }
+ }
+
+ for (Integer netType : mUpstreamIfaceTypes) {
+ NetworkInfo info = null;
+ try {
+ info = mConnService.getNetworkInfo(netType.intValue());
+ } catch (RemoteException e) { }
+ if ((info != null) && info.isConnected()) {
+ upType = netType.intValue();
+ break;
+ }
+ }
+ }
+
+ if (DBG) {
+ Log.d(TAG, "chooseUpstreamType(" + tryCell + "), preferredApn ="
+ + mPreferredUpstreamMobileApn + ", got type=" + upType);
+ }
+
+ // if we're on DUN, put our own grab on it
+ if (upType == ConnectivityManager.TYPE_MOBILE_DUN ||
+ upType == ConnectivityManager.TYPE_MOBILE_HIPRI) {
+ turnOnUpstreamMobileConnection(upType);
+ } else if (upType != ConnectivityManager.TYPE_NONE) {
+ /* If we've found an active upstream connection that's not DUN/HIPRI
+ * we should stop any outstanding DUN/HIPRI start requests.
+ *
+ * If we found NONE we don't want to do this as we want any previous
+ * requests to keep trying to bring up something we can use.
+ */
+ turnOffUpstreamMobileConnection();
+ }
+
+ if (upType == ConnectivityManager.TYPE_NONE) {
+ boolean tryAgainLater = true;
+ if ((tryCell == TRY_TO_SETUP_MOBILE_CONNECTION) &&
+ (turnOnUpstreamMobileConnection(mPreferredUpstreamMobileApn) == true)) {
+ // we think mobile should be coming up - don't set a retry
+ tryAgainLater = false;
+ }
+ if (tryAgainLater) {
+ sendMessageDelayed(CMD_RETRY_UPSTREAM, UPSTREAM_SETTLE_TIME_MS);
+ }
+ } else {
+ LinkProperties linkProperties = null;
+ try {
+ linkProperties = mConnService.getLinkProperties(upType);
+ } catch (RemoteException e) { }
+ if (linkProperties != null) {
+ // Find the interface with the default IPv4 route. It may be the
+ // interface described by linkProperties, or one of the interfaces
+ // stacked on top of it.
+ Log.i(TAG, "Finding IPv4 upstream interface on: " + linkProperties);
+ RouteInfo ipv4Default = RouteInfo.selectBestRoute(
+ linkProperties.getAllRoutes(), Inet4Address.ANY);
+ if (ipv4Default != null) {
+ iface = ipv4Default.getInterface();
+ Log.i(TAG, "Found interface " + ipv4Default.getInterface());
+ } else {
+ Log.i(TAG, "No IPv4 upstream interface, giving up.");
+ }
+ }
+
+ if (iface != null) {
+ String[] dnsServers = mDefaultDnsServers;
+ Collection<InetAddress> dnses = linkProperties.getDnses();
+ if (dnses != null) {
+ // we currently only handle IPv4
+ ArrayList<InetAddress> v4Dnses =
+ new ArrayList<InetAddress>(dnses.size());
+ for (InetAddress dnsAddress : dnses) {
+ if (dnsAddress instanceof Inet4Address) {
+ v4Dnses.add(dnsAddress);
+ }
+ }
+ if (v4Dnses.size() > 0) {
+ dnsServers = NetworkUtils.makeStrings(v4Dnses);
+ }
+ }
+ try {
+ mNMService.setDnsForwarders(dnsServers);
+ } catch (Exception e) {
+ transitionTo(mSetDnsForwardersErrorState);
+ }
+ }
+ }
+ notifyTetheredOfNewUpstreamIface(iface);
+ }
+
+ protected void notifyTetheredOfNewUpstreamIface(String ifaceName) {
+ if (DBG) Log.d(TAG, "notifying tethered with iface =" + ifaceName);
+ mUpstreamIfaceName = ifaceName;
+ for (TetherInterfaceSM sm : mNotifyList) {
+ sm.sendMessage(TetherInterfaceSM.CMD_TETHER_CONNECTION_CHANGED,
+ ifaceName);
+ }
+ }
+ }
+
+ class InitialState extends TetherMasterUtilState {
+ @Override
+ public void enter() {
+ }
+ @Override
+ public boolean processMessage(Message message) {
+ if (DBG) Log.d(TAG, "MasterInitialState.processMessage what=" + message.what);
+ boolean retValue = true;
+ switch (message.what) {
+ case CMD_TETHER_MODE_REQUESTED:
+ TetherInterfaceSM who = (TetherInterfaceSM)message.obj;
+ if (VDBG) Log.d(TAG, "Tether Mode requested by " + who);
+ mNotifyList.add(who);
+ transitionTo(mTetherModeAliveState);
+ break;
+ case CMD_TETHER_MODE_UNREQUESTED:
+ who = (TetherInterfaceSM)message.obj;
+ if (VDBG) Log.d(TAG, "Tether Mode unrequested by " + who);
+ int index = mNotifyList.indexOf(who);
+ if (index != -1) {
+ mNotifyList.remove(who);
+ }
+ break;
+ default:
+ retValue = false;
+ break;
+ }
+ return retValue;
+ }
+ }
+
+ class TetherModeAliveState extends TetherMasterUtilState {
+ boolean mTryCell = !WAIT_FOR_NETWORK_TO_SETTLE;
+ @Override
+ public void enter() {
+ turnOnMasterTetherSettings(); // may transition us out
+
+ mTryCell = !WAIT_FOR_NETWORK_TO_SETTLE; // better try something first pass
+ // or crazy tests cases will fail
+ chooseUpstreamType(mTryCell);
+ mTryCell = !mTryCell;
+ }
+ @Override
+ public void exit() {
+ turnOffUpstreamMobileConnection();
+ notifyTetheredOfNewUpstreamIface(null);
+ }
+ @Override
+ public boolean processMessage(Message message) {
+ if (DBG) Log.d(TAG, "TetherModeAliveState.processMessage what=" + message.what);
+ boolean retValue = true;
+ switch (message.what) {
+ case CMD_TETHER_MODE_REQUESTED:
+ TetherInterfaceSM who = (TetherInterfaceSM)message.obj;
+ if (VDBG) Log.d(TAG, "Tether Mode requested by " + who);
+ mNotifyList.add(who);
+ who.sendMessage(TetherInterfaceSM.CMD_TETHER_CONNECTION_CHANGED,
+ mUpstreamIfaceName);
+ break;
+ case CMD_TETHER_MODE_UNREQUESTED:
+ who = (TetherInterfaceSM)message.obj;
+ if (VDBG) Log.d(TAG, "Tether Mode unrequested by " + who);
+ int index = mNotifyList.indexOf(who);
+ if (index != -1) {
+ if (DBG) Log.d(TAG, "TetherModeAlive removing notifyee " + who);
+ mNotifyList.remove(index);
+ if (mNotifyList.isEmpty()) {
+ turnOffMasterTetherSettings(); // transitions appropriately
+ } else {
+ if (DBG) {
+ Log.d(TAG, "TetherModeAlive still has " + mNotifyList.size() +
+ " live requests:");
+ for (Object o : mNotifyList) Log.d(TAG, " " + o);
+ }
+ }
+ } else {
+ Log.e(TAG, "TetherModeAliveState UNREQUESTED has unknown who: " + who);
+ }
+ break;
+ case CMD_UPSTREAM_CHANGED:
+ // need to try DUN immediately if Wifi goes down
+ mTryCell = !WAIT_FOR_NETWORK_TO_SETTLE;
+ chooseUpstreamType(mTryCell);
+ mTryCell = !mTryCell;
+ break;
+ case CMD_CELL_CONNECTION_RENEW:
+ // make sure we're still using a requested connection - may have found
+ // wifi or something since then.
+ if (mCurrentConnectionSequence == message.arg1) {
+ if (VDBG) {
+ Log.d(TAG, "renewing mobile connection - requeuing for another " +
+ CELL_CONNECTION_RENEW_MS + "ms");
+ }
+ turnOnUpstreamMobileConnection(mMobileApnReserved);
+ }
+ break;
+ case CMD_RETRY_UPSTREAM:
+ chooseUpstreamType(mTryCell);
+ mTryCell = !mTryCell;
+ break;
+ default:
+ retValue = false;
+ break;
+ }
+ return retValue;
+ }
+ }
+
+ class ErrorState extends State {
+ int mErrorNotification;
+ @Override
+ public boolean processMessage(Message message) {
+ boolean retValue = true;
+ switch (message.what) {
+ case CMD_TETHER_MODE_REQUESTED:
+ TetherInterfaceSM who = (TetherInterfaceSM)message.obj;
+ who.sendMessage(mErrorNotification);
+ break;
+ default:
+ retValue = false;
+ }
+ return retValue;
+ }
+ void notify(int msgType) {
+ mErrorNotification = msgType;
+ for (Object o : mNotifyList) {
+ TetherInterfaceSM sm = (TetherInterfaceSM)o;
+ sm.sendMessage(msgType);
+ }
+ }
+
+ }
+ class SetIpForwardingEnabledErrorState extends ErrorState {
+ @Override
+ public void enter() {
+ Log.e(TAG, "Error in setIpForwardingEnabled");
+ notify(TetherInterfaceSM.CMD_IP_FORWARDING_ENABLE_ERROR);
+ }
+ }
+
+ class SetIpForwardingDisabledErrorState extends ErrorState {
+ @Override
+ public void enter() {
+ Log.e(TAG, "Error in setIpForwardingDisabled");
+ notify(TetherInterfaceSM.CMD_IP_FORWARDING_DISABLE_ERROR);
+ }
+ }
+
+ class StartTetheringErrorState extends ErrorState {
+ @Override
+ public void enter() {
+ Log.e(TAG, "Error in startTethering");
+ notify(TetherInterfaceSM.CMD_START_TETHERING_ERROR);
+ try {
+ mNMService.setIpForwardingEnabled(false);
+ } catch (Exception e) {}
+ }
+ }
+
+ class StopTetheringErrorState extends ErrorState {
+ @Override
+ public void enter() {
+ Log.e(TAG, "Error in stopTethering");
+ notify(TetherInterfaceSM.CMD_STOP_TETHERING_ERROR);
+ try {
+ mNMService.setIpForwardingEnabled(false);
+ } catch (Exception e) {}
+ }
+ }
+
+ class SetDnsForwardersErrorState extends ErrorState {
+ @Override
+ public void enter() {
+ Log.e(TAG, "Error in setDnsForwarders");
+ notify(TetherInterfaceSM.CMD_SET_DNS_FORWARDERS_ERROR);
+ try {
+ mNMService.stopTethering();
+ } catch (Exception e) {}
+ try {
+ mNMService.setIpForwardingEnabled(false);
+ } catch (Exception e) {}
+ }
+ }
+ }
+
+ public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
+ if (mContext.checkCallingOrSelfPermission(
+ android.Manifest.permission.DUMP) != PackageManager.PERMISSION_GRANTED) {
+ pw.println("Permission Denial: can't dump ConnectivityService.Tether " +
+ "from from pid=" + Binder.getCallingPid() + ", uid=" +
+ Binder.getCallingUid());
+ return;
+ }
+
+ synchronized (mPublicSync) {
+ pw.println("mUpstreamIfaceTypes: ");
+ for (Integer netType : mUpstreamIfaceTypes) {
+ pw.println(" " + netType);
+ }
+
+ pw.println();
+ pw.println("Tether state:");
+ for (Object o : mIfaces.values()) {
+ pw.println(" " + o);
+ }
+ }
+ pw.println();
+ return;
+ }
+}
generated by cgit v1.1 at 2024-06-11 07:55:18 +0000