| /* |
| * 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 static android.hardware.usb.UsbManager.USB_CONFIGURED; |
| import static android.hardware.usb.UsbManager.USB_CONNECTED; |
| import static android.hardware.usb.UsbManager.USB_FUNCTION_RNDIS; |
| import static android.net.ConnectivityManager.ACTION_TETHER_STATE_CHANGED; |
| import static android.net.ConnectivityManager.CONNECTIVITY_ACTION; |
| import static android.net.ConnectivityManager.EXTRA_ACTIVE_LOCAL_ONLY; |
| import static android.net.ConnectivityManager.EXTRA_ACTIVE_TETHER; |
| import static android.net.ConnectivityManager.EXTRA_AVAILABLE_TETHER; |
| import static android.net.ConnectivityManager.EXTRA_ERRORED_TETHER; |
| import static android.net.ConnectivityManager.EXTRA_NETWORK_INFO; |
| import static android.net.ConnectivityManager.TETHERING_BLUETOOTH; |
| import static android.net.ConnectivityManager.TETHERING_INVALID; |
| import static android.net.ConnectivityManager.TETHERING_USB; |
| import static android.net.ConnectivityManager.TETHERING_WIFI; |
| import static android.net.ConnectivityManager.TETHER_ERROR_MASTER_ERROR; |
| import static android.net.ConnectivityManager.TETHER_ERROR_NO_ERROR; |
| import static android.net.ConnectivityManager.TETHER_ERROR_SERVICE_UNAVAIL; |
| import static android.net.ConnectivityManager.TETHER_ERROR_UNAVAIL_IFACE; |
| import static android.net.ConnectivityManager.TETHER_ERROR_UNKNOWN_IFACE; |
| import static android.net.wifi.WifiManager.EXTRA_WIFI_AP_INTERFACE_NAME; |
| import static android.net.wifi.WifiManager.EXTRA_WIFI_AP_MODE; |
| import static android.net.wifi.WifiManager.EXTRA_WIFI_AP_STATE; |
| import static android.net.wifi.WifiManager.IFACE_IP_MODE_CONFIGURATION_ERROR; |
| import static android.net.wifi.WifiManager.IFACE_IP_MODE_LOCAL_ONLY; |
| import static android.net.wifi.WifiManager.IFACE_IP_MODE_TETHERED; |
| import static android.net.wifi.WifiManager.IFACE_IP_MODE_UNSPECIFIED; |
| import static android.net.wifi.WifiManager.WIFI_AP_STATE_DISABLED; |
| import static android.telephony.CarrierConfigManager.ACTION_CARRIER_CONFIG_CHANGED; |
| |
| import static com.android.server.ConnectivityService.SHORT_ARG; |
| |
| import android.app.Notification; |
| import android.app.NotificationManager; |
| import android.app.PendingIntent; |
| import android.bluetooth.BluetoothAdapter; |
| import android.bluetooth.BluetoothPan; |
| import android.bluetooth.BluetoothProfile; |
| import android.bluetooth.BluetoothProfile.ServiceListener; |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.content.res.Resources; |
| import android.hardware.usb.UsbManager; |
| import android.net.INetworkPolicyManager; |
| import android.net.INetworkStatsService; |
| import android.net.ITetheringEventCallback; |
| import android.net.IpPrefix; |
| import android.net.LinkAddress; |
| import android.net.LinkProperties; |
| import android.net.Network; |
| import android.net.NetworkInfo; |
| import android.net.NetworkState; |
| import android.net.NetworkUtils; |
| import android.net.ip.IpServer; |
| import android.net.util.InterfaceSet; |
| import android.net.util.PrefixUtils; |
| import android.net.util.SharedLog; |
| import android.net.util.VersionedBroadcastListener; |
| import android.net.wifi.WifiManager; |
| import android.os.Binder; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.INetworkManagementService; |
| import android.os.Looper; |
| import android.os.Message; |
| import android.os.RemoteCallbackList; |
| import android.os.RemoteException; |
| import android.os.ResultReceiver; |
| import android.os.UserHandle; |
| import android.os.UserManager; |
| import android.os.UserManagerInternal; |
| import android.os.UserManagerInternal.UserRestrictionsListener; |
| import android.text.TextUtils; |
| import android.util.ArrayMap; |
| import android.util.Log; |
| import android.util.SparseArray; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.internal.messages.nano.SystemMessageProto.SystemMessage; |
| import com.android.internal.notification.SystemNotificationChannels; |
| import com.android.internal.telephony.TelephonyIntents; |
| import com.android.internal.util.DumpUtils; |
| import com.android.internal.util.IndentingPrintWriter; |
| import com.android.internal.util.MessageUtils; |
| import com.android.internal.util.Protocol; |
| import com.android.internal.util.State; |
| import com.android.internal.util.StateMachine; |
| import com.android.server.LocalServices; |
| import com.android.server.connectivity.tethering.EntitlementManager; |
| import com.android.server.connectivity.tethering.IPv6TetheringCoordinator; |
| import com.android.server.connectivity.tethering.OffloadController; |
| import com.android.server.connectivity.tethering.TetheringConfiguration; |
| import com.android.server.connectivity.tethering.TetheringDependencies; |
| import com.android.server.connectivity.tethering.TetheringInterfaceUtils; |
| import com.android.server.connectivity.tethering.UpstreamNetworkMonitor; |
| import com.android.server.net.BaseNetworkObserver; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.net.InetAddress; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** |
| * @hide |
| * |
| * This class holds much of the business logic to allow Android devices |
| * to act as IP gateways via USB, BT, and WiFi interfaces. |
| */ |
| public class Tethering extends BaseNetworkObserver { |
| |
| private final static String TAG = Tethering.class.getSimpleName(); |
| private final static boolean DBG = false; |
| private final static boolean VDBG = false; |
| |
| private static final Class[] messageClasses = { |
| Tethering.class, TetherMasterSM.class, IpServer.class |
| }; |
| private static final SparseArray<String> sMagicDecoderRing = |
| MessageUtils.findMessageNames(messageClasses); |
| |
| private static class TetherState { |
| public final IpServer ipServer; |
| public int lastState; |
| public int lastError; |
| |
| public TetherState(IpServer ipServer) { |
| this.ipServer = ipServer; |
| // Assume all state machines start out available and with no errors. |
| lastState = IpServer.STATE_AVAILABLE; |
| lastError = TETHER_ERROR_NO_ERROR; |
| } |
| |
| public boolean isCurrentlyServing() { |
| switch (lastState) { |
| case IpServer.STATE_TETHERED: |
| case IpServer.STATE_LOCAL_ONLY: |
| return true; |
| default: |
| return false; |
| } |
| } |
| } |
| |
| private final SharedLog mLog = new SharedLog(TAG); |
| |
| // used to synchronize public access to members |
| private final Object mPublicSync; |
| private final Context mContext; |
| private final ArrayMap<String, TetherState> mTetherStates; |
| private final BroadcastReceiver mStateReceiver; |
| private final INetworkManagementService mNMService; |
| private final INetworkStatsService mStatsService; |
| private final INetworkPolicyManager mPolicyManager; |
| private final Looper mLooper; |
| private final StateMachine mTetherMasterSM; |
| private final OffloadController mOffloadController; |
| private final UpstreamNetworkMonitor mUpstreamNetworkMonitor; |
| // TODO: Figure out how to merge this and other downstream-tracking objects |
| // into a single coherent structure. |
| private final HashSet<IpServer> mForwardedDownstreams; |
| private final VersionedBroadcastListener mCarrierConfigChange; |
| private final VersionedBroadcastListener mDefaultSubscriptionChange; |
| private final TetheringDependencies mDeps; |
| private final EntitlementManager mEntitlementMgr; |
| private final Handler mHandler; |
| private final RemoteCallbackList<ITetheringEventCallback> mTetheringEventCallbacks = |
| new RemoteCallbackList<>(); |
| |
| private volatile TetheringConfiguration mConfig; |
| private InterfaceSet mCurrentUpstreamIfaceSet; |
| private Notification.Builder mTetheredNotificationBuilder; |
| private int mLastNotificationId; |
| |
| private boolean mRndisEnabled; // track the RNDIS function enabled state |
| // True iff. WiFi tethering should be started when soft AP is ready. |
| private boolean mWifiTetherRequested; |
| private Network mTetherUpstream; |
| |
| public Tethering(Context context, INetworkManagementService nmService, |
| INetworkStatsService statsService, INetworkPolicyManager policyManager, |
| Looper looper, MockableSystemProperties systemProperties, |
| TetheringDependencies deps) { |
| mLog.mark("constructed"); |
| mContext = context; |
| mNMService = nmService; |
| mStatsService = statsService; |
| mPolicyManager = policyManager; |
| mLooper = looper; |
| mDeps = deps; |
| |
| mPublicSync = new Object(); |
| |
| mTetherStates = new ArrayMap<>(); |
| |
| mTetherMasterSM = new TetherMasterSM("TetherMaster", mLooper, deps); |
| mTetherMasterSM.start(); |
| |
| mHandler = mTetherMasterSM.getHandler(); |
| mOffloadController = new OffloadController(mHandler, |
| mDeps.getOffloadHardwareInterface(mHandler, mLog), |
| mContext.getContentResolver(), mNMService, |
| mLog); |
| mUpstreamNetworkMonitor = deps.getUpstreamNetworkMonitor(mContext, mTetherMasterSM, mLog, |
| TetherMasterSM.EVENT_UPSTREAM_CALLBACK); |
| mForwardedDownstreams = new HashSet<>(); |
| |
| IntentFilter filter = new IntentFilter(); |
| filter.addAction(ACTION_CARRIER_CONFIG_CHANGED); |
| // EntitlementManager will send EVENT_UPSTREAM_PERMISSION_CHANGED when cellular upstream |
| // permission is changed according to entitlement check result. |
| mEntitlementMgr = mDeps.getEntitlementManager(mContext, mTetherMasterSM, mLog, |
| TetherMasterSM.EVENT_UPSTREAM_PERMISSION_CHANGED, systemProperties); |
| mEntitlementMgr.setOnUiEntitlementFailedListener((int downstream) -> { |
| mLog.log("OBSERVED UiEnitlementFailed"); |
| stopTethering(downstream); |
| }); |
| mEntitlementMgr.setTetheringConfigurationFetcher(() -> { |
| maybeDefaultDataSubChanged(); |
| return mConfig; |
| }); |
| |
| mCarrierConfigChange = new VersionedBroadcastListener( |
| "CarrierConfigChangeListener", mContext, mHandler, filter, |
| (Intent ignored) -> { |
| mLog.log("OBSERVED carrier config change"); |
| updateConfiguration(); |
| mEntitlementMgr.reevaluateSimCardProvisioning(mConfig); |
| }); |
| |
| filter = new IntentFilter(); |
| filter.addAction(TelephonyIntents.ACTION_DEFAULT_DATA_SUBSCRIPTION_CHANGED); |
| mDefaultSubscriptionChange = new VersionedBroadcastListener( |
| "DefaultSubscriptionChangeListener", mContext, mHandler, filter, |
| (Intent ignored) -> { |
| mLog.log("OBSERVED default data subscription change"); |
| maybeDefaultDataSubChanged(); |
| // To avoid launch unexpected provisioning checks, ignore re-provisioning when |
| // no CarrierConfig loaded yet. Assume reevaluateSimCardProvisioning() will be |
| // triggered again when CarrierConfig is loaded. |
| if (mEntitlementMgr.getCarrierConfig(mConfig) != null) { |
| mEntitlementMgr.reevaluateSimCardProvisioning(mConfig); |
| } else { |
| mLog.log("IGNORED reevaluate provisioning due to no carrier config loaded"); |
| } |
| }); |
| mStateReceiver = new StateReceiver(); |
| |
| // Load tethering configuration. |
| updateConfiguration(); |
| |
| startStateMachineUpdaters(mHandler); |
| } |
| |
| private void startStateMachineUpdaters(Handler handler) { |
| mCarrierConfigChange.startListening(); |
| mDefaultSubscriptionChange.startListening(); |
| |
| IntentFilter filter = new IntentFilter(); |
| filter.addAction(UsbManager.ACTION_USB_STATE); |
| filter.addAction(CONNECTIVITY_ACTION); |
| filter.addAction(WifiManager.WIFI_AP_STATE_CHANGED_ACTION); |
| filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED); |
| mContext.registerReceiver(mStateReceiver, filter, null, handler); |
| |
| filter = new IntentFilter(); |
| filter.addAction(Intent.ACTION_MEDIA_SHARED); |
| filter.addAction(Intent.ACTION_MEDIA_UNSHARED); |
| filter.addDataScheme("file"); |
| mContext.registerReceiver(mStateReceiver, filter, null, handler); |
| |
| final UserManagerInternal umi = LocalServices.getService(UserManagerInternal.class); |
| // This check is useful only for some unit tests; example: ConnectivityServiceTest. |
| if (umi != null) { |
| umi.addUserRestrictionsListener(new TetheringUserRestrictionListener(this)); |
| } |
| } |
| |
| private WifiManager getWifiManager() { |
| return (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE); |
| } |
| |
| // NOTE: This is always invoked on the mLooper thread. |
| private void updateConfiguration() { |
| final int subId = mDeps.getDefaultDataSubscriptionId(); |
| updateConfiguration(subId); |
| } |
| |
| private void updateConfiguration(final int subId) { |
| mConfig = new TetheringConfiguration(mContext, mLog, subId); |
| mUpstreamNetworkMonitor.updateMobileRequiresDun(mConfig.isDunRequired); |
| } |
| |
| private void maybeDunSettingChanged() { |
| final boolean isDunRequired = TetheringConfiguration.checkDunRequired(mContext); |
| if (isDunRequired == mConfig.isDunRequired) return; |
| updateConfiguration(); |
| } |
| |
| private void maybeDefaultDataSubChanged() { |
| final int subId = mDeps.getDefaultDataSubscriptionId(); |
| if (subId == mConfig.subId) return; |
| updateConfiguration(subId); |
| } |
| |
| @Override |
| public void interfaceStatusChanged(String iface, boolean up) { |
| // Never called directly: only called from interfaceLinkStateChanged. |
| // See NetlinkHandler.cpp:71. |
| if (VDBG) Log.d(TAG, "interfaceStatusChanged " + iface + ", " + up); |
| synchronized (mPublicSync) { |
| if (up) { |
| maybeTrackNewInterfaceLocked(iface); |
| } else { |
| if (ifaceNameToType(iface) == TETHERING_BLUETOOTH) { |
| stopTrackingInterfaceLocked(iface); |
| } else { |
| // Ignore usb0 down after enabling RNDIS. |
| // We will handle disconnect in interfaceRemoved. |
| // Similarly, ignore interface down for WiFi. We monitor WiFi AP status |
| // through the WifiManager.WIFI_AP_STATE_CHANGED_ACTION intent. |
| if (VDBG) Log.d(TAG, "ignore interface down for " + iface); |
| } |
| } |
| } |
| } |
| |
| @Override |
| public void interfaceLinkStateChanged(String iface, boolean up) { |
| interfaceStatusChanged(iface, up); |
| } |
| |
| private int ifaceNameToType(String iface) { |
| final TetheringConfiguration cfg = mConfig; |
| |
| if (cfg.isWifi(iface)) { |
| return TETHERING_WIFI; |
| } else if (cfg.isUsb(iface)) { |
| return TETHERING_USB; |
| } else if (cfg.isBluetooth(iface)) { |
| return TETHERING_BLUETOOTH; |
| } |
| return TETHERING_INVALID; |
| } |
| |
| @Override |
| public void interfaceAdded(String iface) { |
| if (VDBG) Log.d(TAG, "interfaceAdded " + iface); |
| synchronized (mPublicSync) { |
| maybeTrackNewInterfaceLocked(iface); |
| } |
| } |
| |
| @Override |
| public void interfaceRemoved(String iface) { |
| if (VDBG) Log.d(TAG, "interfaceRemoved " + iface); |
| synchronized (mPublicSync) { |
| stopTrackingInterfaceLocked(iface); |
| } |
| } |
| |
| public void startTethering(int type, ResultReceiver receiver, boolean showProvisioningUi) { |
| mEntitlementMgr.startProvisioningIfNeeded(type, showProvisioningUi); |
| enableTetheringInternal(type, true /* enabled */, receiver); |
| } |
| |
| public void stopTethering(int type) { |
| enableTetheringInternal(type, false /* disabled */, null); |
| mEntitlementMgr.stopProvisioningIfNeeded(type); |
| } |
| |
| /** |
| * Enables or disables tethering for the given type. If provisioning is required, it will |
| * schedule provisioning rechecks for the specified interface. |
| */ |
| private void enableTetheringInternal(int type, boolean enable, ResultReceiver receiver) { |
| int result; |
| switch (type) { |
| case TETHERING_WIFI: |
| result = setWifiTethering(enable); |
| sendTetherResult(receiver, result); |
| break; |
| case TETHERING_USB: |
| result = setUsbTethering(enable); |
| sendTetherResult(receiver, result); |
| break; |
| case TETHERING_BLUETOOTH: |
| setBluetoothTethering(enable, receiver); |
| break; |
| default: |
| Log.w(TAG, "Invalid tether type."); |
| sendTetherResult(receiver, TETHER_ERROR_UNKNOWN_IFACE); |
| } |
| } |
| |
| private void sendTetherResult(ResultReceiver receiver, int result) { |
| if (receiver != null) { |
| receiver.send(result, null); |
| } |
| } |
| |
| private int setWifiTethering(final boolean enable) { |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| synchronized (mPublicSync) { |
| final WifiManager mgr = getWifiManager(); |
| if (mgr == null) { |
| mLog.e("setWifiTethering: failed to get WifiManager!"); |
| return TETHER_ERROR_SERVICE_UNAVAIL; |
| } |
| if ((enable && mgr.startSoftAp(null /* use existing wifi config */)) || |
| (!enable && mgr.stopSoftAp())) { |
| mWifiTetherRequested = enable; |
| return TETHER_ERROR_NO_ERROR; |
| } |
| } |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| |
| return TETHER_ERROR_MASTER_ERROR; |
| } |
| |
| private void setBluetoothTethering(final boolean enable, final ResultReceiver receiver) { |
| final BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter(); |
| if (adapter == null || !adapter.isEnabled()) { |
| Log.w(TAG, "Tried to enable bluetooth tethering with null or disabled adapter. null: " + |
| (adapter == null)); |
| sendTetherResult(receiver, TETHER_ERROR_SERVICE_UNAVAIL); |
| return; |
| } |
| |
| adapter.getProfileProxy(mContext, new ServiceListener() { |
| @Override |
| public void onServiceDisconnected(int profile) { } |
| |
| @Override |
| public void onServiceConnected(int profile, BluetoothProfile proxy) { |
| ((BluetoothPan) proxy).setBluetoothTethering(enable); |
| // TODO: Enabling bluetooth tethering can fail asynchronously here. |
| // We should figure out a way to bubble up that failure instead of sending success. |
| final int result = (((BluetoothPan) proxy).isTetheringOn() == enable) |
| ? TETHER_ERROR_NO_ERROR |
| : TETHER_ERROR_MASTER_ERROR; |
| sendTetherResult(receiver, result); |
| adapter.closeProfileProxy(BluetoothProfile.PAN, proxy); |
| } |
| }, BluetoothProfile.PAN); |
| } |
| |
| public int tether(String iface) { |
| return tether(iface, IpServer.STATE_TETHERED); |
| } |
| |
| private int tether(String iface, int requestedState) { |
| if (DBG) Log.d(TAG, "Tethering " + iface); |
| synchronized (mPublicSync) { |
| TetherState tetherState = mTetherStates.get(iface); |
| if (tetherState == null) { |
| Log.e(TAG, "Tried to Tether an unknown iface: " + iface + ", ignoring"); |
| return TETHER_ERROR_UNKNOWN_IFACE; |
| } |
| // Ignore the error status of the interface. If the interface is available, |
| // the errors are referring to past tethering attempts anyway. |
| if (tetherState.lastState != IpServer.STATE_AVAILABLE) { |
| Log.e(TAG, "Tried to Tether an unavailable iface: " + iface + ", ignoring"); |
| return TETHER_ERROR_UNAVAIL_IFACE; |
| } |
| // NOTE: If a CMD_TETHER_REQUESTED message is already in the TISM's |
| // queue but not yet processed, this will be a no-op and it will not |
| // return an error. |
| // |
| // TODO: reexamine the threading and messaging model. |
| tetherState.ipServer.sendMessage(IpServer.CMD_TETHER_REQUESTED, requestedState); |
| return TETHER_ERROR_NO_ERROR; |
| } |
| } |
| |
| public int untether(String iface) { |
| if (DBG) Log.d(TAG, "Untethering " + iface); |
| synchronized (mPublicSync) { |
| TetherState tetherState = mTetherStates.get(iface); |
| if (tetherState == null) { |
| Log.e(TAG, "Tried to Untether an unknown iface :" + iface + ", ignoring"); |
| return TETHER_ERROR_UNKNOWN_IFACE; |
| } |
| if (!tetherState.isCurrentlyServing()) { |
| Log.e(TAG, "Tried to untether an inactive iface :" + iface + ", ignoring"); |
| return TETHER_ERROR_UNAVAIL_IFACE; |
| } |
| tetherState.ipServer.sendMessage(IpServer.CMD_TETHER_UNREQUESTED); |
| return TETHER_ERROR_NO_ERROR; |
| } |
| } |
| |
| public void untetherAll() { |
| stopTethering(TETHERING_WIFI); |
| stopTethering(TETHERING_USB); |
| stopTethering(TETHERING_BLUETOOTH); |
| } |
| |
| public int getLastTetherError(String iface) { |
| synchronized (mPublicSync) { |
| TetherState tetherState = mTetherStates.get(iface); |
| if (tetherState == null) { |
| Log.e(TAG, "Tried to getLastTetherError on an unknown iface :" + iface + |
| ", ignoring"); |
| return TETHER_ERROR_UNKNOWN_IFACE; |
| } |
| return tetherState.lastError; |
| } |
| } |
| |
| // TODO: Figure out how to update for local hotspot mode interfaces. |
| private void sendTetherStateChangedBroadcast() { |
| if (!mDeps.isTetheringSupported()) return; |
| |
| final ArrayList<String> availableList = new ArrayList<>(); |
| final ArrayList<String> tetherList = new ArrayList<>(); |
| final ArrayList<String> localOnlyList = new ArrayList<>(); |
| final ArrayList<String> erroredList = new ArrayList<>(); |
| |
| boolean wifiTethered = false; |
| boolean usbTethered = false; |
| boolean bluetoothTethered = false; |
| |
| final TetheringConfiguration cfg = mConfig; |
| |
| synchronized (mPublicSync) { |
| for (int i = 0; i < mTetherStates.size(); i++) { |
| TetherState tetherState = mTetherStates.valueAt(i); |
| String iface = mTetherStates.keyAt(i); |
| if (tetherState.lastError != TETHER_ERROR_NO_ERROR) { |
| erroredList.add(iface); |
| } else if (tetherState.lastState == IpServer.STATE_AVAILABLE) { |
| availableList.add(iface); |
| } else if (tetherState.lastState == IpServer.STATE_LOCAL_ONLY) { |
| localOnlyList.add(iface); |
| } else if (tetherState.lastState == IpServer.STATE_TETHERED) { |
| if (cfg.isUsb(iface)) { |
| usbTethered = true; |
| } else if (cfg.isWifi(iface)) { |
| wifiTethered = true; |
| } else if (cfg.isBluetooth(iface)) { |
| bluetoothTethered = true; |
| } |
| tetherList.add(iface); |
| } |
| } |
| } |
| final Intent bcast = new Intent(ACTION_TETHER_STATE_CHANGED); |
| bcast.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | |
| Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); |
| bcast.putStringArrayListExtra(EXTRA_AVAILABLE_TETHER, availableList); |
| bcast.putStringArrayListExtra(EXTRA_ACTIVE_LOCAL_ONLY, localOnlyList); |
| bcast.putStringArrayListExtra(EXTRA_ACTIVE_TETHER, tetherList); |
| bcast.putStringArrayListExtra(EXTRA_ERRORED_TETHER, erroredList); |
| mContext.sendStickyBroadcastAsUser(bcast, UserHandle.ALL); |
| if (DBG) { |
| Log.d(TAG, String.format( |
| "sendTetherStateChangedBroadcast %s=[%s] %s=[%s] %s=[%s] %s=[%s]", |
| "avail", TextUtils.join(",", availableList), |
| "local_only", TextUtils.join(",", localOnlyList), |
| "tether", TextUtils.join(",", tetherList), |
| "error", TextUtils.join(",", erroredList))); |
| } |
| |
| if (usbTethered) { |
| if (wifiTethered || bluetoothTethered) { |
| showTetheredNotification(SystemMessage.NOTE_TETHER_GENERAL); |
| } else { |
| showTetheredNotification(SystemMessage.NOTE_TETHER_USB); |
| } |
| } else if (wifiTethered) { |
| if (bluetoothTethered) { |
| showTetheredNotification(SystemMessage.NOTE_TETHER_GENERAL); |
| } else { |
| /* We now have a status bar icon for WifiTethering, so drop the notification */ |
| clearTetheredNotification(); |
| } |
| } else if (bluetoothTethered) { |
| showTetheredNotification(SystemMessage.NOTE_TETHER_BLUETOOTH); |
| } else { |
| clearTetheredNotification(); |
| } |
| } |
| |
| private void showTetheredNotification(int id) { |
| showTetheredNotification(id, true); |
| } |
| |
| @VisibleForTesting |
| protected void showTetheredNotification(int id, boolean tetheringOn) { |
| NotificationManager notificationManager = |
| (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE); |
| if (notificationManager == null) { |
| return; |
| } |
| int icon = 0; |
| switch(id) { |
| case SystemMessage.NOTE_TETHER_USB: |
| icon = com.android.internal.R.drawable.stat_sys_tether_usb; |
| break; |
| case SystemMessage.NOTE_TETHER_BLUETOOTH: |
| icon = com.android.internal.R.drawable.stat_sys_tether_bluetooth; |
| break; |
| case SystemMessage.NOTE_TETHER_GENERAL: |
| default: |
| icon = com.android.internal.R.drawable.stat_sys_tether_general; |
| break; |
| } |
| |
| if (mLastNotificationId != 0) { |
| if (mLastNotificationId == icon) { |
| return; |
| } |
| notificationManager.cancelAsUser(null, mLastNotificationId, |
| UserHandle.ALL); |
| mLastNotificationId = 0; |
| } |
| |
| 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(); |
| final CharSequence title; |
| final CharSequence message; |
| |
| if (tetheringOn) { |
| title = r.getText(com.android.internal.R.string.tethered_notification_title); |
| message = r.getText(com.android.internal.R.string.tethered_notification_message); |
| } else { |
| title = r.getText(com.android.internal.R.string.disable_tether_notification_title); |
| message = r.getText(com.android.internal.R.string.disable_tether_notification_message); |
| } |
| |
| if (mTetheredNotificationBuilder == null) { |
| mTetheredNotificationBuilder = |
| new Notification.Builder(mContext, SystemNotificationChannels.NETWORK_STATUS); |
| mTetheredNotificationBuilder.setWhen(0) |
| .setOngoing(true) |
| .setColor(mContext.getColor( |
| com.android.internal.R.color.system_notification_accent_color)) |
| .setVisibility(Notification.VISIBILITY_PUBLIC) |
| .setCategory(Notification.CATEGORY_STATUS); |
| } |
| mTetheredNotificationBuilder.setSmallIcon(icon) |
| .setContentTitle(title) |
| .setContentText(message) |
| .setContentIntent(pi); |
| mLastNotificationId = id; |
| |
| notificationManager.notifyAsUser(null, mLastNotificationId, |
| mTetheredNotificationBuilder.buildInto(new Notification()), UserHandle.ALL); |
| } |
| |
| @VisibleForTesting |
| protected void clearTetheredNotification() { |
| NotificationManager notificationManager = |
| (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE); |
| if (notificationManager != null && mLastNotificationId != 0) { |
| notificationManager.cancelAsUser(null, mLastNotificationId, |
| UserHandle.ALL); |
| mLastNotificationId = 0; |
| } |
| } |
| |
| private class StateReceiver extends BroadcastReceiver { |
| @Override |
| public void onReceive(Context content, Intent intent) { |
| final String action = intent.getAction(); |
| if (action == null) return; |
| |
| if (action.equals(UsbManager.ACTION_USB_STATE)) { |
| handleUsbAction(intent); |
| } else if (action.equals(CONNECTIVITY_ACTION)) { |
| handleConnectivityAction(intent); |
| } else if (action.equals(WifiManager.WIFI_AP_STATE_CHANGED_ACTION)) { |
| handleWifiApAction(intent); |
| } else if (action.equals(Intent.ACTION_CONFIGURATION_CHANGED)) { |
| mLog.log("OBSERVED configuration changed"); |
| updateConfiguration(); |
| } |
| } |
| |
| private void handleConnectivityAction(Intent intent) { |
| final NetworkInfo networkInfo = |
| (NetworkInfo) intent.getParcelableExtra(EXTRA_NETWORK_INFO); |
| if (networkInfo == null || |
| networkInfo.getDetailedState() == NetworkInfo.DetailedState.FAILED) { |
| return; |
| } |
| |
| if (VDBG) Log.d(TAG, "Tethering got CONNECTIVITY_ACTION: " + networkInfo.toString()); |
| mTetherMasterSM.sendMessage(TetherMasterSM.CMD_UPSTREAM_CHANGED); |
| } |
| |
| private void handleUsbAction(Intent intent) { |
| final boolean usbConnected = intent.getBooleanExtra(USB_CONNECTED, false); |
| final boolean usbConfigured = intent.getBooleanExtra(USB_CONFIGURED, false); |
| final boolean rndisEnabled = intent.getBooleanExtra(USB_FUNCTION_RNDIS, false); |
| |
| mLog.log(String.format("USB bcast connected:%s configured:%s rndis:%s", |
| usbConnected, usbConfigured, rndisEnabled)); |
| |
| // There are three types of ACTION_USB_STATE: |
| // |
| // - DISCONNECTED (USB_CONNECTED and USB_CONFIGURED are 0) |
| // Meaning: USB connection has ended either because of |
| // software reset or hard unplug. |
| // |
| // - CONNECTED (USB_CONNECTED is 1, USB_CONFIGURED is 0) |
| // Meaning: the first stage of USB protocol handshake has |
| // occurred but it is not complete. |
| // |
| // - CONFIGURED (USB_CONNECTED and USB_CONFIGURED are 1) |
| // Meaning: the USB handshake is completely done and all the |
| // functions are ready to use. |
| // |
| // For more explanation, see b/62552150 . |
| synchronized (Tethering.this.mPublicSync) { |
| if (!usbConnected && mRndisEnabled) { |
| // Turn off tethering if it was enabled and there is a disconnect. |
| tetherMatchingInterfaces(IpServer.STATE_AVAILABLE, TETHERING_USB); |
| mEntitlementMgr.stopProvisioningIfNeeded(TETHERING_USB); |
| } else if (usbConfigured && rndisEnabled) { |
| // Tether if rndis is enabled and usb is configured. |
| tetherMatchingInterfaces(IpServer.STATE_TETHERED, TETHERING_USB); |
| } |
| mRndisEnabled = usbConfigured && rndisEnabled; |
| } |
| } |
| |
| private void handleWifiApAction(Intent intent) { |
| final int curState = intent.getIntExtra(EXTRA_WIFI_AP_STATE, WIFI_AP_STATE_DISABLED); |
| final String ifname = intent.getStringExtra(EXTRA_WIFI_AP_INTERFACE_NAME); |
| final int ipmode = intent.getIntExtra(EXTRA_WIFI_AP_MODE, IFACE_IP_MODE_UNSPECIFIED); |
| |
| synchronized (Tethering.this.mPublicSync) { |
| switch (curState) { |
| case WifiManager.WIFI_AP_STATE_ENABLING: |
| // We can see this state on the way to both enabled and failure states. |
| break; |
| case WifiManager.WIFI_AP_STATE_ENABLED: |
| enableWifiIpServingLocked(ifname, ipmode); |
| break; |
| case WifiManager.WIFI_AP_STATE_DISABLED: |
| case WifiManager.WIFI_AP_STATE_DISABLING: |
| case WifiManager.WIFI_AP_STATE_FAILED: |
| default: |
| disableWifiIpServingLocked(ifname, curState); |
| mEntitlementMgr.stopProvisioningIfNeeded(TETHERING_WIFI); |
| break; |
| } |
| } |
| } |
| } |
| |
| @VisibleForTesting |
| protected static class TetheringUserRestrictionListener implements UserRestrictionsListener { |
| private final Tethering mWrapper; |
| |
| public TetheringUserRestrictionListener(Tethering wrapper) { |
| mWrapper = wrapper; |
| } |
| |
| public void onUserRestrictionsChanged(int userId, |
| Bundle newRestrictions, |
| Bundle prevRestrictions) { |
| final boolean newlyDisallowed = |
| newRestrictions.getBoolean(UserManager.DISALLOW_CONFIG_TETHERING); |
| final boolean previouslyDisallowed = |
| prevRestrictions.getBoolean(UserManager.DISALLOW_CONFIG_TETHERING); |
| final boolean tetheringDisallowedChanged = (newlyDisallowed != previouslyDisallowed); |
| |
| if (!tetheringDisallowedChanged) { |
| return; |
| } |
| |
| mWrapper.clearTetheredNotification(); |
| final boolean isTetheringActiveOnDevice = (mWrapper.getTetheredIfaces().length != 0); |
| |
| if (newlyDisallowed && isTetheringActiveOnDevice) { |
| mWrapper.showTetheredNotification( |
| com.android.internal.R.drawable.stat_sys_tether_general, false); |
| mWrapper.untetherAll(); |
| } |
| } |
| } |
| |
| private void disableWifiIpServingLocked(String ifname, int apState) { |
| mLog.log("Canceling WiFi tethering request - AP_STATE=" + apState); |
| |
| // Regardless of whether we requested this transition, the AP has gone |
| // down. Don't try to tether again unless we're requested to do so. |
| // TODO: Remove this altogether, once Wi-Fi reliably gives us an |
| // interface name with every broadcast. |
| mWifiTetherRequested = false; |
| |
| if (!TextUtils.isEmpty(ifname)) { |
| final TetherState ts = mTetherStates.get(ifname); |
| if (ts != null) { |
| ts.ipServer.unwanted(); |
| return; |
| } |
| } |
| |
| for (int i = 0; i < mTetherStates.size(); i++) { |
| final IpServer ipServer = mTetherStates.valueAt(i).ipServer; |
| if (ipServer.interfaceType() == TETHERING_WIFI) { |
| ipServer.unwanted(); |
| return; |
| } |
| } |
| |
| mLog.log("Error disabling Wi-Fi IP serving; " + |
| (TextUtils.isEmpty(ifname) ? "no interface name specified" |
| : "specified interface: " + ifname)); |
| } |
| |
| private void enableWifiIpServingLocked(String ifname, int wifiIpMode) { |
| // Map wifiIpMode values to IpServer.Callback serving states, inferring |
| // from mWifiTetherRequested as a final "best guess". |
| final int ipServingMode; |
| switch (wifiIpMode) { |
| case IFACE_IP_MODE_TETHERED: |
| ipServingMode = IpServer.STATE_TETHERED; |
| break; |
| case IFACE_IP_MODE_LOCAL_ONLY: |
| ipServingMode = IpServer.STATE_LOCAL_ONLY; |
| break; |
| default: |
| mLog.e("Cannot enable IP serving in unknown WiFi mode: " + wifiIpMode); |
| return; |
| } |
| |
| if (!TextUtils.isEmpty(ifname)) { |
| maybeTrackNewInterfaceLocked(ifname, TETHERING_WIFI); |
| changeInterfaceState(ifname, ipServingMode); |
| } else { |
| mLog.e(String.format( |
| "Cannot enable IP serving in mode %s on missing interface name", |
| ipServingMode)); |
| } |
| } |
| |
| // TODO: Consider renaming to something more accurate in its description. |
| // This method: |
| // - allows requesting either tethering or local hotspot serving states |
| // - handles both enabling and disabling serving states |
| // - only tethers the first matching interface in listInterfaces() |
| // order of a given type |
| private void tetherMatchingInterfaces(int requestedState, int interfaceType) { |
| if (VDBG) { |
| Log.d(TAG, "tetherMatchingInterfaces(" + requestedState + ", " + interfaceType + ")"); |
| } |
| |
| String[] ifaces = null; |
| try { |
| ifaces = mNMService.listInterfaces(); |
| } catch (Exception e) { |
| Log.e(TAG, "Error listing Interfaces", e); |
| return; |
| } |
| String chosenIface = null; |
| if (ifaces != null) { |
| for (String iface : ifaces) { |
| if (ifaceNameToType(iface) == interfaceType) { |
| chosenIface = iface; |
| break; |
| } |
| } |
| } |
| if (chosenIface == null) { |
| Log.e(TAG, "could not find iface of type " + interfaceType); |
| return; |
| } |
| |
| changeInterfaceState(chosenIface, requestedState); |
| } |
| |
| private void changeInterfaceState(String ifname, int requestedState) { |
| final int result; |
| switch (requestedState) { |
| case IpServer.STATE_UNAVAILABLE: |
| case IpServer.STATE_AVAILABLE: |
| result = untether(ifname); |
| break; |
| case IpServer.STATE_TETHERED: |
| case IpServer.STATE_LOCAL_ONLY: |
| result = tether(ifname, requestedState); |
| break; |
| default: |
| Log.wtf(TAG, "Unknown interface state: " + requestedState); |
| return; |
| } |
| if (result != TETHER_ERROR_NO_ERROR) { |
| Log.e(TAG, "unable start or stop tethering on iface " + ifname); |
| return; |
| } |
| } |
| |
| public TetheringConfiguration getTetheringConfiguration() { |
| return mConfig; |
| } |
| |
| public boolean hasTetherableConfiguration() { |
| final TetheringConfiguration cfg = mConfig; |
| final boolean hasDownstreamConfiguration = |
| (cfg.tetherableUsbRegexs.length != 0) |
| || (cfg.tetherableWifiRegexs.length != 0) |
| || (cfg.tetherableBluetoothRegexs.length != 0); |
| final boolean hasUpstreamConfiguration = !cfg.preferredUpstreamIfaceTypes.isEmpty() |
| || cfg.chooseUpstreamAutomatically; |
| |
| return hasDownstreamConfiguration && hasUpstreamConfiguration; |
| } |
| |
| // TODO - update callers to use getTetheringConfiguration(), |
| // which has only final members. |
| public String[] getTetherableUsbRegexs() { |
| return copy(mConfig.tetherableUsbRegexs); |
| } |
| |
| public String[] getTetherableWifiRegexs() { |
| return copy(mConfig.tetherableWifiRegexs); |
| } |
| |
| public String[] getTetherableBluetoothRegexs() { |
| return copy(mConfig.tetherableBluetoothRegexs); |
| } |
| |
| public int setUsbTethering(boolean enable) { |
| if (VDBG) Log.d(TAG, "setUsbTethering(" + enable + ")"); |
| UsbManager usbManager = (UsbManager) mContext.getSystemService(Context.USB_SERVICE); |
| if (usbManager == null) { |
| mLog.e("setUsbTethering: failed to get UsbManager!"); |
| return TETHER_ERROR_SERVICE_UNAVAIL; |
| } |
| |
| synchronized (mPublicSync) { |
| usbManager.setCurrentFunctions(enable ? UsbManager.FUNCTION_RNDIS |
| : UsbManager.FUNCTION_NONE); |
| } |
| return TETHER_ERROR_NO_ERROR; |
| } |
| |
| // TODO review API - figure out how to delete these entirely. |
| public String[] getTetheredIfaces() { |
| ArrayList<String> list = new ArrayList<String>(); |
| synchronized (mPublicSync) { |
| for (int i = 0; i < mTetherStates.size(); i++) { |
| TetherState tetherState = mTetherStates.valueAt(i); |
| if (tetherState.lastState == IpServer.STATE_TETHERED) { |
| list.add(mTetherStates.keyAt(i)); |
| } |
| } |
| } |
| return list.toArray(new String[list.size()]); |
| } |
| |
| public String[] getTetherableIfaces() { |
| ArrayList<String> list = new ArrayList<String>(); |
| synchronized (mPublicSync) { |
| for (int i = 0; i < mTetherStates.size(); i++) { |
| TetherState tetherState = mTetherStates.valueAt(i); |
| if (tetherState.lastState == IpServer.STATE_AVAILABLE) { |
| list.add(mTetherStates.keyAt(i)); |
| } |
| } |
| } |
| return list.toArray(new String[list.size()]); |
| } |
| |
| public String[] getTetheredDhcpRanges() { |
| // TODO: this is only valid for the old DHCP server. Latest search suggests it is only used |
| // by WifiP2pServiceImpl to start dnsmasq: remove/deprecate after migrating callers. |
| return mConfig.legacyDhcpRanges; |
| } |
| |
| public String[] getErroredIfaces() { |
| ArrayList<String> list = new ArrayList<String>(); |
| synchronized (mPublicSync) { |
| for (int i = 0; i < mTetherStates.size(); i++) { |
| TetherState tetherState = mTetherStates.valueAt(i); |
| if (tetherState.lastError != TETHER_ERROR_NO_ERROR) { |
| list.add(mTetherStates.keyAt(i)); |
| } |
| } |
| } |
| return list.toArray(new String[list.size()]); |
| } |
| |
| private void logMessage(State state, int what) { |
| mLog.log(state.getName() + " got " + sMagicDecoderRing.get(what, Integer.toString(what))); |
| } |
| |
| private boolean upstreamWanted() { |
| if (!mForwardedDownstreams.isEmpty()) return true; |
| |
| synchronized (mPublicSync) { |
| return mWifiTetherRequested; |
| } |
| } |
| |
| // Needed because the canonical source of upstream truth is just the |
| // upstream interface set, |mCurrentUpstreamIfaceSet|. |
| private boolean pertainsToCurrentUpstream(NetworkState ns) { |
| if (ns != null && ns.linkProperties != null && mCurrentUpstreamIfaceSet != null) { |
| for (String ifname : ns.linkProperties.getAllInterfaceNames()) { |
| if (mCurrentUpstreamIfaceSet.ifnames.contains(ifname)) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| class TetherMasterSM extends StateMachine { |
| private static final int BASE_MASTER = Protocol.BASE_TETHERING; |
| // an interface SM has requested Tethering/Local Hotspot |
| static final int EVENT_IFACE_SERVING_STATE_ACTIVE = BASE_MASTER + 1; |
| // an interface SM has unrequested Tethering/Local Hotspot |
| static final int EVENT_IFACE_SERVING_STATE_INACTIVE = BASE_MASTER + 2; |
| // upstream connection change - do the right thing |
| static final int CMD_UPSTREAM_CHANGED = BASE_MASTER + 3; |
| // we don't have a valid upstream conn, check again after a delay |
| static final int CMD_RETRY_UPSTREAM = BASE_MASTER + 4; |
| // Events from NetworkCallbacks that we process on the master state |
| // machine thread on behalf of the UpstreamNetworkMonitor. |
| static final int EVENT_UPSTREAM_CALLBACK = BASE_MASTER + 5; |
| // we treated the error and want now to clear it |
| static final int CMD_CLEAR_ERROR = BASE_MASTER + 6; |
| static final int EVENT_IFACE_UPDATE_LINKPROPERTIES = BASE_MASTER + 7; |
| // Events from EntitlementManager to choose upstream again. |
| static final int EVENT_UPSTREAM_PERMISSION_CHANGED = BASE_MASTER + 8; |
| |
| private final State mInitialState; |
| private final State mTetherModeAliveState; |
| |
| private final State mSetIpForwardingEnabledErrorState; |
| private final State mSetIpForwardingDisabledErrorState; |
| private final State mStartTetheringErrorState; |
| private final State mStopTetheringErrorState; |
| private final State mSetDnsForwardersErrorState; |
| |
| // This list is a little subtle. It contains all the interfaces that currently are |
| // requesting tethering, regardless of whether these interfaces are still members of |
| // mTetherStates. This allows us to maintain the following predicates: |
| // |
| // 1) mTetherStates contains the set of all currently existing, tetherable, link state up |
| // interfaces. |
| // 2) mNotifyList contains all state machines that may have outstanding tethering state |
| // that needs to be torn down. |
| // |
| // Because we excise interfaces immediately from mTetherStates, we must maintain mNotifyList |
| // so that the garbage collector does not clean up the state machine before it has a chance |
| // to tear itself down. |
| private final ArrayList<IpServer> mNotifyList; |
| private final IPv6TetheringCoordinator mIPv6TetheringCoordinator; |
| private final OffloadWrapper mOffload; |
| |
| private static final int UPSTREAM_SETTLE_TIME_MS = 10000; |
| |
| TetherMasterSM(String name, Looper looper, TetheringDependencies deps) { |
| super(name, looper); |
| |
| mInitialState = new InitialState(); |
| mTetherModeAliveState = new TetherModeAliveState(); |
| mSetIpForwardingEnabledErrorState = new SetIpForwardingEnabledErrorState(); |
| mSetIpForwardingDisabledErrorState = new SetIpForwardingDisabledErrorState(); |
| mStartTetheringErrorState = new StartTetheringErrorState(); |
| mStopTetheringErrorState = new StopTetheringErrorState(); |
| mSetDnsForwardersErrorState = new SetDnsForwardersErrorState(); |
| |
| addState(mInitialState); |
| addState(mTetherModeAliveState); |
| addState(mSetIpForwardingEnabledErrorState); |
| addState(mSetIpForwardingDisabledErrorState); |
| addState(mStartTetheringErrorState); |
| addState(mStopTetheringErrorState); |
| addState(mSetDnsForwardersErrorState); |
| |
| mNotifyList = new ArrayList<>(); |
| mIPv6TetheringCoordinator = deps.getIPv6TetheringCoordinator(mNotifyList, mLog); |
| mOffload = new OffloadWrapper(); |
| |
| setInitialState(mInitialState); |
| } |
| |
| class InitialState extends State { |
| @Override |
| public boolean processMessage(Message message) { |
| logMessage(this, message.what); |
| switch (message.what) { |
| case EVENT_IFACE_SERVING_STATE_ACTIVE: { |
| final IpServer who = (IpServer) message.obj; |
| if (VDBG) Log.d(TAG, "Tether Mode requested by " + who); |
| handleInterfaceServingStateActive(message.arg1, who); |
| transitionTo(mTetherModeAliveState); |
| break; |
| } |
| case EVENT_IFACE_SERVING_STATE_INACTIVE: { |
| final IpServer who = (IpServer) message.obj; |
| if (VDBG) Log.d(TAG, "Tether Mode unrequested by " + who); |
| handleInterfaceServingStateInactive(who); |
| break; |
| } |
| case EVENT_IFACE_UPDATE_LINKPROPERTIES: |
| // Silently ignore these for now. |
| break; |
| default: |
| return NOT_HANDLED; |
| } |
| return HANDLED; |
| } |
| } |
| |
| protected boolean turnOnMasterTetherSettings() { |
| final TetheringConfiguration cfg = mConfig; |
| try { |
| mNMService.setIpForwardingEnabled(true); |
| } catch (Exception e) { |
| mLog.e(e); |
| transitionTo(mSetIpForwardingEnabledErrorState); |
| return false; |
| } |
| // TODO: Randomize DHCPv4 ranges, especially in hotspot mode. |
| // Legacy DHCP server is disabled if passed an empty ranges array |
| final String[] dhcpRanges = cfg.enableLegacyDhcpServer |
| ? cfg.legacyDhcpRanges |
| : new String[0]; |
| try { |
| // TODO: Find a more accurate method name (startDHCPv4()?). |
| mNMService.startTethering(dhcpRanges); |
| } catch (Exception e) { |
| try { |
| mNMService.stopTethering(); |
| mNMService.startTethering(dhcpRanges); |
| } catch (Exception ee) { |
| mLog.e(ee); |
| transitionTo(mStartTetheringErrorState); |
| return false; |
| } |
| } |
| mLog.log("SET master tether settings: ON"); |
| return true; |
| } |
| |
| protected boolean turnOffMasterTetherSettings() { |
| try { |
| mNMService.stopTethering(); |
| } catch (Exception e) { |
| mLog.e(e); |
| transitionTo(mStopTetheringErrorState); |
| return false; |
| } |
| try { |
| mNMService.setIpForwardingEnabled(false); |
| } catch (Exception e) { |
| mLog.e(e); |
| transitionTo(mSetIpForwardingDisabledErrorState); |
| return false; |
| } |
| transitionTo(mInitialState); |
| mLog.log("SET master tether settings: OFF"); |
| return true; |
| } |
| |
| protected void chooseUpstreamType(boolean tryCell) { |
| // We rebuild configuration on ACTION_CONFIGURATION_CHANGED, but we |
| // do not currently know how to watch for changes in DUN settings. |
| maybeDunSettingChanged(); |
| |
| final TetheringConfiguration config = mConfig; |
| final NetworkState ns = (config.chooseUpstreamAutomatically) |
| ? mUpstreamNetworkMonitor.getCurrentPreferredUpstream() |
| : mUpstreamNetworkMonitor.selectPreferredUpstreamType( |
| config.preferredUpstreamIfaceTypes); |
| if (ns == null) { |
| if (tryCell) { |
| mUpstreamNetworkMonitor.registerMobileNetworkRequest(); |
| // We think mobile should be coming up; don't set a retry. |
| } else { |
| sendMessageDelayed(CMD_RETRY_UPSTREAM, UPSTREAM_SETTLE_TIME_MS); |
| } |
| } |
| setUpstreamNetwork(ns); |
| final Network newUpstream = (ns != null) ? ns.network : null; |
| if (mTetherUpstream != newUpstream) { |
| mTetherUpstream = newUpstream; |
| mUpstreamNetworkMonitor.setCurrentUpstream(mTetherUpstream); |
| reportUpstreamChanged(mTetherUpstream); |
| } |
| } |
| |
| protected void setUpstreamNetwork(NetworkState ns) { |
| InterfaceSet ifaces = null; |
| if (ns != 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. |
| mLog.i("Looking for default routes on: " + ns.linkProperties); |
| ifaces = TetheringInterfaceUtils.getTetheringInterfaces(ns); |
| mLog.i("Found upstream interface(s): " + ifaces); |
| } |
| |
| if (ifaces != null) { |
| setDnsForwarders(ns.network, ns.linkProperties); |
| } |
| notifyDownstreamsOfNewUpstreamIface(ifaces); |
| if (ns != null && pertainsToCurrentUpstream(ns)) { |
| // If we already have NetworkState for this network update it immediately. |
| handleNewUpstreamNetworkState(ns); |
| } else if (mCurrentUpstreamIfaceSet == null) { |
| // There are no available upstream networks. |
| handleNewUpstreamNetworkState(null); |
| } |
| } |
| |
| protected void setDnsForwarders(final Network network, final LinkProperties lp) { |
| // TODO: Set v4 and/or v6 DNS per available connectivity. |
| String[] dnsServers = mConfig.defaultIPv4DNS; |
| final Collection<InetAddress> dnses = lp.getDnsServers(); |
| // TODO: Properly support the absence of DNS servers. |
| if (dnses != null && !dnses.isEmpty()) { |
| // TODO: remove this invocation of NetworkUtils.makeStrings(). |
| dnsServers = NetworkUtils.makeStrings(dnses); |
| } |
| try { |
| mNMService.setDnsForwarders(network, dnsServers); |
| mLog.log(String.format( |
| "SET DNS forwarders: network=%s dnsServers=%s", |
| network, Arrays.toString(dnsServers))); |
| } catch (Exception e) { |
| // TODO: Investigate how this can fail and what exactly |
| // happens if/when such failures occur. |
| mLog.e("setting DNS forwarders failed, " + e); |
| transitionTo(mSetDnsForwardersErrorState); |
| } |
| } |
| |
| protected void notifyDownstreamsOfNewUpstreamIface(InterfaceSet ifaces) { |
| mCurrentUpstreamIfaceSet = ifaces; |
| for (IpServer ipServer : mNotifyList) { |
| ipServer.sendMessage(IpServer.CMD_TETHER_CONNECTION_CHANGED, ifaces); |
| } |
| } |
| |
| protected void handleNewUpstreamNetworkState(NetworkState ns) { |
| mIPv6TetheringCoordinator.updateUpstreamNetworkState(ns); |
| mOffload.updateUpstreamNetworkState(ns); |
| } |
| |
| private void handleInterfaceServingStateActive(int mode, IpServer who) { |
| if (mNotifyList.indexOf(who) < 0) { |
| mNotifyList.add(who); |
| mIPv6TetheringCoordinator.addActiveDownstream(who, mode); |
| } |
| |
| if (mode == IpServer.STATE_TETHERED) { |
| // No need to notify OffloadController just yet as there are no |
| // "offload-able" prefixes to pass along. This will handled |
| // when the TISM informs Tethering of its LinkProperties. |
| mForwardedDownstreams.add(who); |
| } else { |
| mOffload.excludeDownstreamInterface(who.interfaceName()); |
| mForwardedDownstreams.remove(who); |
| } |
| |
| // If this is a Wi-Fi interface, notify WifiManager of the active serving state. |
| if (who.interfaceType() == TETHERING_WIFI) { |
| final WifiManager mgr = getWifiManager(); |
| final String iface = who.interfaceName(); |
| switch (mode) { |
| case IpServer.STATE_TETHERED: |
| mgr.updateInterfaceIpState(iface, IFACE_IP_MODE_TETHERED); |
| break; |
| case IpServer.STATE_LOCAL_ONLY: |
| mgr.updateInterfaceIpState(iface, IFACE_IP_MODE_LOCAL_ONLY); |
| break; |
| default: |
| Log.wtf(TAG, "Unknown active serving mode: " + mode); |
| break; |
| } |
| } |
| } |
| |
| private void handleInterfaceServingStateInactive(IpServer who) { |
| mNotifyList.remove(who); |
| mIPv6TetheringCoordinator.removeActiveDownstream(who); |
| mOffload.excludeDownstreamInterface(who.interfaceName()); |
| mForwardedDownstreams.remove(who); |
| |
| // If this is a Wi-Fi interface, tell WifiManager of any errors. |
| if (who.interfaceType() == TETHERING_WIFI) { |
| if (who.lastError() != TETHER_ERROR_NO_ERROR) { |
| getWifiManager().updateInterfaceIpState( |
| who.interfaceName(), IFACE_IP_MODE_CONFIGURATION_ERROR); |
| } |
| } |
| } |
| |
| private void handleUpstreamNetworkMonitorCallback(int arg1, Object o) { |
| if (arg1 == UpstreamNetworkMonitor.NOTIFY_LOCAL_PREFIXES) { |
| mOffload.sendOffloadExemptPrefixes((Set<IpPrefix>) o); |
| return; |
| } |
| |
| final NetworkState ns = (NetworkState) o; |
| |
| if (ns == null || !pertainsToCurrentUpstream(ns)) { |
| // TODO: In future, this is where upstream evaluation and selection |
| // could be handled for notifications which include sufficient data. |
| // For example, after CONNECTIVITY_ACTION listening is removed, here |
| // is where we could observe a Wi-Fi network becoming available and |
| // passing validation. |
| if (mCurrentUpstreamIfaceSet == null) { |
| // If we have no upstream interface, try to run through upstream |
| // selection again. If, for example, IPv4 connectivity has shown up |
| // after IPv6 (e.g., 464xlat became available) we want the chance to |
| // notice and act accordingly. |
| chooseUpstreamType(false); |
| } |
| return; |
| } |
| |
| switch (arg1) { |
| case UpstreamNetworkMonitor.EVENT_ON_CAPABILITIES: |
| handleNewUpstreamNetworkState(ns); |
| break; |
| case UpstreamNetworkMonitor.EVENT_ON_LINKPROPERTIES: |
| chooseUpstreamType(false); |
| break; |
| case UpstreamNetworkMonitor.EVENT_ON_LOST: |
| // TODO: Re-evaluate possible upstreams. Currently upstream |
| // reevaluation is triggered via received CONNECTIVITY_ACTION |
| // broadcasts that result in being passed a |
| // TetherMasterSM.CMD_UPSTREAM_CHANGED. |
| handleNewUpstreamNetworkState(null); |
| break; |
| default: |
| mLog.e("Unknown arg1 value: " + arg1); |
| break; |
| } |
| } |
| |
| class TetherModeAliveState extends State { |
| boolean mUpstreamWanted = false; |
| boolean mTryCell = true; |
| |
| @Override |
| public void enter() { |
| // If turning on master tether settings fails, we have already |
| // transitioned to an error state; exit early. |
| if (!turnOnMasterTetherSettings()) { |
| return; |
| } |
| |
| mUpstreamNetworkMonitor.startObserveAllNetworks(); |
| |
| // TODO: De-duplicate with updateUpstreamWanted() below. |
| if (upstreamWanted()) { |
| mUpstreamWanted = true; |
| mOffload.start(); |
| chooseUpstreamType(true); |
| mTryCell = false; |
| } |
| } |
| |
| @Override |
| public void exit() { |
| mOffload.stop(); |
| mUpstreamNetworkMonitor.stop(); |
| notifyDownstreamsOfNewUpstreamIface(null); |
| handleNewUpstreamNetworkState(null); |
| if (mTetherUpstream != null) { |
| mTetherUpstream = null; |
| reportUpstreamChanged(null); |
| } |
| } |
| |
| private boolean updateUpstreamWanted() { |
| final boolean previousUpstreamWanted = mUpstreamWanted; |
| mUpstreamWanted = upstreamWanted(); |
| if (mUpstreamWanted != previousUpstreamWanted) { |
| if (mUpstreamWanted) { |
| mOffload.start(); |
| } else { |
| mOffload.stop(); |
| } |
| } |
| return previousUpstreamWanted; |
| } |
| |
| @Override |
| public boolean processMessage(Message message) { |
| logMessage(this, message.what); |
| boolean retValue = true; |
| switch (message.what) { |
| case EVENT_IFACE_SERVING_STATE_ACTIVE: { |
| IpServer who = (IpServer) message.obj; |
| if (VDBG) Log.d(TAG, "Tether Mode requested by " + who); |
| handleInterfaceServingStateActive(message.arg1, who); |
| who.sendMessage(IpServer.CMD_TETHER_CONNECTION_CHANGED, |
| mCurrentUpstreamIfaceSet); |
| // If there has been a change and an upstream is now |
| // desired, kick off the selection process. |
| final boolean previousUpstreamWanted = updateUpstreamWanted(); |
| if (!previousUpstreamWanted && mUpstreamWanted) { |
| chooseUpstreamType(true); |
| } |
| break; |
| } |
| case EVENT_IFACE_SERVING_STATE_INACTIVE: { |
| IpServer who = (IpServer) message.obj; |
| if (VDBG) Log.d(TAG, "Tether Mode unrequested by " + who); |
| handleInterfaceServingStateInactive(who); |
| |
| if (mNotifyList.isEmpty()) { |
| // This transitions us out of TetherModeAliveState, |
| // either to InitialState or an error state. |
| turnOffMasterTetherSettings(); |
| break; |
| } |
| |
| if (DBG) { |
| Log.d(TAG, "TetherModeAlive still has " + mNotifyList.size() + |
| " live requests:"); |
| for (IpServer o : mNotifyList) { |
| Log.d(TAG, " " + o); |
| } |
| } |
| // If there has been a change and an upstream is no |
| // longer desired, release any mobile requests. |
| final boolean previousUpstreamWanted = updateUpstreamWanted(); |
| if (previousUpstreamWanted && !mUpstreamWanted) { |
| mUpstreamNetworkMonitor.releaseMobileNetworkRequest(); |
| } |
| break; |
| } |
| case EVENT_IFACE_UPDATE_LINKPROPERTIES: { |
| final LinkProperties newLp = (LinkProperties) message.obj; |
| if (message.arg1 == IpServer.STATE_TETHERED) { |
| mOffload.updateDownstreamLinkProperties(newLp); |
| } else { |
| mOffload.excludeDownstreamInterface(newLp.getInterfaceName()); |
| } |
| break; |
| } |
| case EVENT_UPSTREAM_PERMISSION_CHANGED: |
| case CMD_UPSTREAM_CHANGED: |
| updateUpstreamWanted(); |
| if (!mUpstreamWanted) break; |
| |
| // Need to try DUN immediately if Wi-Fi goes down. |
| chooseUpstreamType(true); |
| mTryCell = false; |
| break; |
| case CMD_RETRY_UPSTREAM: |
| updateUpstreamWanted(); |
| if (!mUpstreamWanted) break; |
| |
| chooseUpstreamType(mTryCell); |
| mTryCell = !mTryCell; |
| break; |
| case EVENT_UPSTREAM_CALLBACK: { |
| updateUpstreamWanted(); |
| if (mUpstreamWanted) { |
| handleUpstreamNetworkMonitorCallback(message.arg1, message.obj); |
| } |
| break; |
| } |
| default: |
| retValue = false; |
| break; |
| } |
| return retValue; |
| } |
| } |
| |
| class ErrorState extends State { |
| private int mErrorNotification; |
| |
| @Override |
| public boolean processMessage(Message message) { |
| boolean retValue = true; |
| switch (message.what) { |
| case EVENT_IFACE_SERVING_STATE_ACTIVE: |
| IpServer who = (IpServer) message.obj; |
| who.sendMessage(mErrorNotification); |
| break; |
| case CMD_CLEAR_ERROR: |
| mErrorNotification = TETHER_ERROR_NO_ERROR; |
| transitionTo(mInitialState); |
| break; |
| default: |
| retValue = false; |
| } |
| return retValue; |
| } |
| |
| void notify(int msgType) { |
| mErrorNotification = msgType; |
| for (IpServer ipServer : mNotifyList) { |
| ipServer.sendMessage(msgType); |
| } |
| } |
| |
| } |
| |
| class SetIpForwardingEnabledErrorState extends ErrorState { |
| @Override |
| public void enter() { |
| Log.e(TAG, "Error in setIpForwardingEnabled"); |
| notify(IpServer.CMD_IP_FORWARDING_ENABLE_ERROR); |
| } |
| } |
| |
| class SetIpForwardingDisabledErrorState extends ErrorState { |
| @Override |
| public void enter() { |
| Log.e(TAG, "Error in setIpForwardingDisabled"); |
| notify(IpServer.CMD_IP_FORWARDING_DISABLE_ERROR); |
| } |
| } |
| |
| class StartTetheringErrorState extends ErrorState { |
| @Override |
| public void enter() { |
| Log.e(TAG, "Error in startTethering"); |
| notify(IpServer.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(IpServer.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(IpServer.CMD_SET_DNS_FORWARDERS_ERROR); |
| try { |
| mNMService.stopTethering(); |
| } catch (Exception e) {} |
| try { |
| mNMService.setIpForwardingEnabled(false); |
| } catch (Exception e) {} |
| } |
| } |
| |
| // A wrapper class to handle multiple situations where several calls to |
| // the OffloadController need to happen together. |
| // |
| // TODO: This suggests that the interface between OffloadController and |
| // Tethering is in need of improvement. Refactor these calls into the |
| // OffloadController implementation. |
| class OffloadWrapper { |
| public void start() { |
| mOffloadController.start(); |
| sendOffloadExemptPrefixes(); |
| } |
| |
| public void stop() { |
| mOffloadController.stop(); |
| } |
| |
| public void updateUpstreamNetworkState(NetworkState ns) { |
| mOffloadController.setUpstreamLinkProperties( |
| (ns != null) ? ns.linkProperties : null); |
| } |
| |
| public void updateDownstreamLinkProperties(LinkProperties newLp) { |
| // Update the list of offload-exempt prefixes before adding |
| // new prefixes on downstream interfaces to the offload HAL. |
| sendOffloadExemptPrefixes(); |
| mOffloadController.notifyDownstreamLinkProperties(newLp); |
| } |
| |
| public void excludeDownstreamInterface(String ifname) { |
| // This and other interfaces may be in local-only hotspot mode; |
| // resend all local prefixes to the OffloadController. |
| sendOffloadExemptPrefixes(); |
| mOffloadController.removeDownstreamInterface(ifname); |
| } |
| |
| public void sendOffloadExemptPrefixes() { |
| sendOffloadExemptPrefixes(mUpstreamNetworkMonitor.getLocalPrefixes()); |
| } |
| |
| public void sendOffloadExemptPrefixes(final Set<IpPrefix> localPrefixes) { |
| // Add in well-known minimum set. |
| PrefixUtils.addNonForwardablePrefixes(localPrefixes); |
| // Add tragically hardcoded prefixes. |
| localPrefixes.add(PrefixUtils.DEFAULT_WIFI_P2P_PREFIX); |
| |
| // Maybe add prefixes or addresses for downstreams, depending on |
| // the IP serving mode of each. |
| for (IpServer ipServer : mNotifyList) { |
| final LinkProperties lp = ipServer.linkProperties(); |
| |
| switch (ipServer.servingMode()) { |
| case IpServer.STATE_UNAVAILABLE: |
| case IpServer.STATE_AVAILABLE: |
| // No usable LinkProperties in these states. |
| continue; |
| case IpServer.STATE_TETHERED: |
| // Only add IPv4 /32 and IPv6 /128 prefixes. The |
| // directly-connected prefixes will be sent as |
| // downstream "offload-able" prefixes. |
| for (LinkAddress addr : lp.getAllLinkAddresses()) { |
| final InetAddress ip = addr.getAddress(); |
| if (ip.isLinkLocalAddress()) continue; |
| localPrefixes.add(PrefixUtils.ipAddressAsPrefix(ip)); |
| } |
| break; |
| case IpServer.STATE_LOCAL_ONLY: |
| // Add prefixes covering all local IPs. |
| localPrefixes.addAll(PrefixUtils.localPrefixesFrom(lp)); |
| break; |
| } |
| } |
| |
| mOffloadController.setLocalPrefixes(localPrefixes); |
| } |
| } |
| } |
| |
| public void systemReady() { |
| mUpstreamNetworkMonitor.startTrackDefaultNetwork(mDeps.getDefaultNetworkRequest(), |
| mEntitlementMgr); |
| } |
| |
| /** Get the latest value of the tethering entitlement check. */ |
| public void getLatestTetheringEntitlementResult(int type, ResultReceiver receiver, |
| boolean showEntitlementUi) { |
| if (receiver != null) { |
| mEntitlementMgr.getLatestTetheringEntitlementResult(type, receiver, showEntitlementUi); |
| } |
| } |
| |
| /** Register tethering event callback */ |
| public void registerTetheringEventCallback(ITetheringEventCallback callback) { |
| mHandler.post(() -> { |
| try { |
| callback.onUpstreamChanged(mTetherUpstream); |
| } catch (RemoteException e) { |
| // Not really very much to do here. |
| } |
| mTetheringEventCallbacks.register(callback); |
| }); |
| } |
| |
| /** Unregister tethering event callback */ |
| public void unregisterTetheringEventCallback(ITetheringEventCallback callback) { |
| mHandler.post(() -> { |
| mTetheringEventCallbacks.unregister(callback); |
| }); |
| } |
| |
| private void reportUpstreamChanged(Network network) { |
| final int length = mTetheringEventCallbacks.beginBroadcast(); |
| try { |
| for (int i = 0; i < length; i++) { |
| try { |
| mTetheringEventCallbacks.getBroadcastItem(i).onUpstreamChanged(network); |
| } catch (RemoteException e) { |
| // Not really very much to do here. |
| } |
| } |
| } finally { |
| mTetheringEventCallbacks.finishBroadcast(); |
| } |
| } |
| |
| @Override |
| public void dump(FileDescriptor fd, PrintWriter writer, String[] args) { |
| // Binder.java closes the resource for us. |
| @SuppressWarnings("resource") |
| final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); |
| if (!DumpUtils.checkDumpPermission(mContext, TAG, pw)) return; |
| |
| pw.println("Tethering:"); |
| pw.increaseIndent(); |
| |
| pw.println("Configuration:"); |
| pw.increaseIndent(); |
| final TetheringConfiguration cfg = mConfig; |
| cfg.dump(pw); |
| pw.decreaseIndent(); |
| |
| pw.println("Entitlement:"); |
| pw.increaseIndent(); |
| mEntitlementMgr.dump(pw); |
| pw.decreaseIndent(); |
| |
| synchronized (mPublicSync) { |
| pw.println("Tether state:"); |
| pw.increaseIndent(); |
| for (int i = 0; i < mTetherStates.size(); i++) { |
| final String iface = mTetherStates.keyAt(i); |
| final TetherState tetherState = mTetherStates.valueAt(i); |
| pw.print(iface + " - "); |
| |
| switch (tetherState.lastState) { |
| case IpServer.STATE_UNAVAILABLE: |
| pw.print("UnavailableState"); |
| break; |
| case IpServer.STATE_AVAILABLE: |
| pw.print("AvailableState"); |
| break; |
| case IpServer.STATE_TETHERED: |
| pw.print("TetheredState"); |
| break; |
| case IpServer.STATE_LOCAL_ONLY: |
| pw.print("LocalHotspotState"); |
| break; |
| default: |
| pw.print("UnknownState"); |
| break; |
| } |
| pw.println(" - lastError = " + tetherState.lastError); |
| } |
| pw.println("Upstream wanted: " + upstreamWanted()); |
| pw.println("Current upstream interface(s): " + mCurrentUpstreamIfaceSet); |
| pw.decreaseIndent(); |
| } |
| |
| pw.println("Hardware offload:"); |
| pw.increaseIndent(); |
| mOffloadController.dump(pw); |
| pw.decreaseIndent(); |
| |
| pw.println("Log:"); |
| pw.increaseIndent(); |
| if (argsContain(args, SHORT_ARG)) { |
| pw.println("<log removed for brevity>"); |
| } else { |
| mLog.dump(fd, pw, args); |
| } |
| pw.decreaseIndent(); |
| |
| pw.decreaseIndent(); |
| } |
| |
| private static boolean argsContain(String[] args, String target) { |
| for (String arg : args) { |
| if (target.equals(arg)) return true; |
| } |
| return false; |
| } |
| |
| private IpServer.Callback makeControlCallback() { |
| return new IpServer.Callback() { |
| @Override |
| public void updateInterfaceState(IpServer who, int state, int lastError) { |
| notifyInterfaceStateChange(who, state, lastError); |
| } |
| |
| @Override |
| public void updateLinkProperties(IpServer who, LinkProperties newLp) { |
| notifyLinkPropertiesChanged(who, newLp); |
| } |
| }; |
| } |
| |
| // TODO: Move into TetherMasterSM. |
| private void notifyInterfaceStateChange(IpServer who, int state, int error) { |
| final String iface = who.interfaceName(); |
| synchronized (mPublicSync) { |
| final TetherState tetherState = mTetherStates.get(iface); |
| if (tetherState != null && tetherState.ipServer.equals(who)) { |
| tetherState.lastState = state; |
| tetherState.lastError = error; |
| } else { |
| if (DBG) Log.d(TAG, "got notification from stale iface " + iface); |
| } |
| } |
| |
| mLog.log(String.format("OBSERVED iface=%s state=%s error=%s", iface, state, error)); |
| |
| try { |
| // Notify that we're tethering (or not) this interface. |
| // This is how data saver for instance knows if the user explicitly |
| // turned on tethering (thus keeping us from being in data saver mode). |
| mPolicyManager.onTetheringChanged(iface, state == IpServer.STATE_TETHERED); |
| } catch (RemoteException e) { |
| // Not really very much we can do here. |
| } |
| |
| // If TetherMasterSM is in ErrorState, TetherMasterSM stays there. |
| // Thus we give a chance for TetherMasterSM to recover to InitialState |
| // by sending CMD_CLEAR_ERROR |
| if (error == TETHER_ERROR_MASTER_ERROR) { |
| mTetherMasterSM.sendMessage(TetherMasterSM.CMD_CLEAR_ERROR, who); |
| } |
| int which; |
| switch (state) { |
| case IpServer.STATE_UNAVAILABLE: |
| case IpServer.STATE_AVAILABLE: |
| which = TetherMasterSM.EVENT_IFACE_SERVING_STATE_INACTIVE; |
| break; |
| case IpServer.STATE_TETHERED: |
| case IpServer.STATE_LOCAL_ONLY: |
| which = TetherMasterSM.EVENT_IFACE_SERVING_STATE_ACTIVE; |
| break; |
| default: |
| Log.wtf(TAG, "Unknown interface state: " + state); |
| return; |
| } |
| mTetherMasterSM.sendMessage(which, state, 0, who); |
| sendTetherStateChangedBroadcast(); |
| } |
| |
| private void notifyLinkPropertiesChanged(IpServer who, LinkProperties newLp) { |
| final String iface = who.interfaceName(); |
| final int state; |
| synchronized (mPublicSync) { |
| final TetherState tetherState = mTetherStates.get(iface); |
| if (tetherState != null && tetherState.ipServer.equals(who)) { |
| state = tetherState.lastState; |
| } else { |
| mLog.log("got notification from stale iface " + iface); |
| return; |
| } |
| } |
| |
| mLog.log(String.format( |
| "OBSERVED LinkProperties update iface=%s state=%s lp=%s", |
| iface, IpServer.getStateString(state), newLp)); |
| final int which = TetherMasterSM.EVENT_IFACE_UPDATE_LINKPROPERTIES; |
| mTetherMasterSM.sendMessage(which, state, 0, newLp); |
| } |
| |
| private void maybeTrackNewInterfaceLocked(final String iface) { |
| // If we don't care about this type of interface, ignore. |
| final int interfaceType = ifaceNameToType(iface); |
| if (interfaceType == TETHERING_INVALID) { |
| mLog.log(iface + " is not a tetherable iface, ignoring"); |
| return; |
| } |
| maybeTrackNewInterfaceLocked(iface, interfaceType); |
| } |
| |
| private void maybeTrackNewInterfaceLocked(final String iface, int interfaceType) { |
| // If we have already started a TISM for this interface, skip. |
| if (mTetherStates.containsKey(iface)) { |
| mLog.log("active iface (" + iface + ") reported as added, ignoring"); |
| return; |
| } |
| |
| mLog.log("adding TetheringInterfaceStateMachine for: " + iface); |
| final TetherState tetherState = new TetherState( |
| new IpServer(iface, mLooper, interfaceType, mLog, mNMService, mStatsService, |
| makeControlCallback(), mConfig.enableLegacyDhcpServer, |
| mDeps.getIpServerDependencies())); |
| mTetherStates.put(iface, tetherState); |
| tetherState.ipServer.start(); |
| } |
| |
| private void stopTrackingInterfaceLocked(final String iface) { |
| final TetherState tetherState = mTetherStates.get(iface); |
| if (tetherState == null) { |
| mLog.log("attempting to remove unknown iface (" + iface + "), ignoring"); |
| return; |
| } |
| tetherState.ipServer.stop(); |
| mLog.log("removing TetheringInterfaceStateMachine for: " + iface); |
| mTetherStates.remove(iface); |
| } |
| |
| private static String[] copy(String[] strarray) { |
| return Arrays.copyOf(strarray, strarray.length); |
| } |
| } |
