| /* |
| * 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.getNetworkTypeName; |
| 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 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.ComponentName; |
| 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.INetworkPolicyManager; |
| import android.net.INetworkStatsService; |
| import android.net.IpPrefix; |
| import android.net.LinkProperties; |
| import android.net.Network; |
| import android.net.NetworkCapabilities; |
| import android.net.NetworkInfo; |
| import android.net.NetworkRequest; |
| import android.net.NetworkState; |
| import android.net.NetworkUtils; |
| import android.net.RouteInfo; |
| import android.net.util.PrefixUtils; |
| import android.net.util.SharedLog; |
| 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.Parcel; |
| import android.os.RemoteException; |
| import android.os.ResultReceiver; |
| import android.os.UserHandle; |
| import android.provider.Settings; |
| import android.telephony.CarrierConfigManager; |
| import android.telephony.TelephonyManager; |
| 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.IccCardConstants; |
| 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.connectivity.tethering.IControlsTethering; |
| import com.android.server.connectivity.tethering.IPv6TetheringCoordinator; |
| import com.android.server.connectivity.tethering.OffloadController; |
| import com.android.server.connectivity.tethering.SimChangeListener; |
| import com.android.server.connectivity.tethering.TetherInterfaceStateMachine; |
| import com.android.server.connectivity.tethering.TetheringConfiguration; |
| import com.android.server.connectivity.tethering.TetheringDependencies; |
| import com.android.server.connectivity.tethering.UpstreamNetworkMonitor; |
| import com.android.server.net.BaseNetworkObserver; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.net.Inet4Address; |
| import java.net.InetAddress; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| |
| /** |
| * @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; |
| |
| protected static final String DISABLE_PROVISIONING_SYSPROP_KEY = "net.tethering.noprovisioning"; |
| |
| private static final Class[] messageClasses = { |
| Tethering.class, TetherMasterSM.class, TetherInterfaceStateMachine.class |
| }; |
| private static final SparseArray<String> sMagicDecoderRing = |
| MessageUtils.findMessageNames(messageClasses); |
| |
| // {@link ComponentName} of the Service used to run tether provisioning. |
| private static final ComponentName TETHER_SERVICE = ComponentName.unflattenFromString(Resources |
| .getSystem().getString(com.android.internal.R.string.config_wifi_tether_enable)); |
| |
| private static class TetherState { |
| public final TetherInterfaceStateMachine stateMachine; |
| public int lastState; |
| public int lastError; |
| |
| public TetherState(TetherInterfaceStateMachine sm) { |
| stateMachine = sm; |
| // Assume all state machines start out available and with no errors. |
| lastState = IControlsTethering.STATE_AVAILABLE; |
| lastError = ConnectivityManager.TETHER_ERROR_NO_ERROR; |
| } |
| |
| public boolean isCurrentlyServing() { |
| switch (lastState) { |
| case IControlsTethering.STATE_TETHERED: |
| case IControlsTethering.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 MockableSystemProperties mSystemProperties; |
| 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<TetherInterfaceStateMachine> mForwardedDownstreams; |
| private final SimChangeListener mSimChange; |
| |
| private volatile TetheringConfiguration mConfig; |
| private String mCurrentUpstreamIface; |
| private Notification.Builder mTetheredNotificationBuilder; |
| private int mLastNotificationId; |
| |
| private boolean mRndisEnabled; // track the RNDIS function enabled state |
| private boolean mUsbTetherRequested; // true if USB tethering should be started |
| // when RNDIS is enabled |
| // True iff. WiFi tethering should be started when soft AP is ready. |
| private boolean mWifiTetherRequested; |
| |
| 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; |
| mSystemProperties = systemProperties; |
| |
| mPublicSync = new Object(); |
| |
| mTetherStates = new ArrayMap<>(); |
| |
| mTetherMasterSM = new TetherMasterSM("TetherMaster", mLooper); |
| mTetherMasterSM.start(); |
| |
| final Handler smHandler = mTetherMasterSM.getHandler(); |
| mOffloadController = new OffloadController(smHandler, |
| deps.getOffloadHardwareInterface(smHandler, mLog), |
| mContext.getContentResolver(), mNMService, |
| mLog); |
| mUpstreamNetworkMonitor = new UpstreamNetworkMonitor( |
| mContext, mTetherMasterSM, mLog, TetherMasterSM.EVENT_UPSTREAM_CALLBACK); |
| mForwardedDownstreams = new HashSet<>(); |
| mSimChange = new SimChangeListener( |
| mContext, smHandler, () -> reevaluateSimCardProvisioning()); |
| |
| mStateReceiver = new StateReceiver(); |
| IntentFilter filter = new IntentFilter(); |
| filter.addAction(UsbManager.ACTION_USB_STATE); |
| filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION); |
| filter.addAction(WifiManager.WIFI_AP_STATE_CHANGED_ACTION); |
| filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED); |
| mContext.registerReceiver(mStateReceiver, filter, null, smHandler); |
| |
| filter = new IntentFilter(); |
| filter.addAction(Intent.ACTION_MEDIA_SHARED); |
| filter.addAction(Intent.ACTION_MEDIA_UNSHARED); |
| filter.addDataScheme("file"); |
| mContext.registerReceiver(mStateReceiver, filter, null, smHandler); |
| |
| // load device config info |
| updateConfiguration(); |
| } |
| |
| // We can't do this once in the Tethering() constructor and cache the value, because the |
| // CONNECTIVITY_SERVICE is registered only after the Tethering() constructor has completed. |
| private ConnectivityManager getConnectivityManager() { |
| return (ConnectivityManager) mContext.getSystemService(Context.CONNECTIVITY_SERVICE); |
| } |
| |
| private WifiManager getWifiManager() { |
| return (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE); |
| } |
| |
| // NOTE: This is always invoked on the mLooper thread. |
| private void updateConfiguration() { |
| mConfig = new TetheringConfiguration(mContext, mLog); |
| mUpstreamNetworkMonitor.updateMobileRequiresDun(mConfig.isDunRequired); |
| } |
| |
| private void maybeUpdateConfiguration() { |
| final int dunCheck = TetheringConfiguration.checkDunRequired(mContext); |
| if (dunCheck == mConfig.dunCheck) return; |
| updateConfiguration(); |
| } |
| |
| @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) == ConnectivityManager.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 ConnectivityManager.TETHERING_WIFI; |
| } else if (cfg.isUsb(iface)) { |
| return ConnectivityManager.TETHERING_USB; |
| } else if (cfg.isBluetooth(iface)) { |
| return ConnectivityManager.TETHERING_BLUETOOTH; |
| } |
| return ConnectivityManager.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) { |
| if (!isTetherProvisioningRequired()) { |
| enableTetheringInternal(type, true, receiver); |
| return; |
| } |
| |
| if (showProvisioningUi) { |
| runUiTetherProvisioningAndEnable(type, receiver); |
| } else { |
| runSilentTetherProvisioningAndEnable(type, receiver); |
| } |
| } |
| |
| public void stopTethering(int type) { |
| enableTetheringInternal(type, false, null); |
| if (isTetherProvisioningRequired()) { |
| cancelTetherProvisioningRechecks(type); |
| } |
| } |
| |
| /** |
| * Check if the device requires a provisioning check in order to enable tethering. |
| * |
| * @return a boolean - {@code true} indicating tether provisioning is required by the carrier. |
| */ |
| @VisibleForTesting |
| protected boolean isTetherProvisioningRequired() { |
| String[] provisionApp = mContext.getResources().getStringArray( |
| com.android.internal.R.array.config_mobile_hotspot_provision_app); |
| if (mSystemProperties.getBoolean(DISABLE_PROVISIONING_SYSPROP_KEY, false) |
| || provisionApp == null) { |
| return false; |
| } |
| |
| // Check carrier config for entitlement checks |
| final CarrierConfigManager configManager = (CarrierConfigManager) mContext |
| .getSystemService(Context.CARRIER_CONFIG_SERVICE); |
| if (configManager != null && configManager.getConfig() != null) { |
| // we do have a CarrierConfigManager and it has a config. |
| boolean isEntitlementCheckRequired = configManager.getConfig().getBoolean( |
| CarrierConfigManager.KEY_REQUIRE_ENTITLEMENT_CHECKS_BOOL); |
| if (!isEntitlementCheckRequired) { |
| return false; |
| } |
| } |
| return (provisionApp.length == 2); |
| } |
| |
| // Used by the SIM card change observation code. |
| // TODO: De-duplicate above code. |
| private boolean hasMobileHotspotProvisionApp() { |
| try { |
| if (!mContext.getResources().getString(com.android.internal.R.string. |
| config_mobile_hotspot_provision_app_no_ui).isEmpty()) { |
| Log.d(TAG, "re-evaluate provisioning"); |
| return true; |
| } |
| } catch (Resources.NotFoundException e) {} |
| Log.d(TAG, "no prov-check needed for new SIM"); |
| return false; |
| } |
| |
| /** |
| * Enables or disables tethering for the given type. This should only be called once |
| * provisioning has succeeded or is not necessary. It will also schedule provisioning rechecks |
| * for the specified interface. |
| */ |
| private void enableTetheringInternal(int type, boolean enable, ResultReceiver receiver) { |
| boolean isProvisioningRequired = enable && isTetherProvisioningRequired(); |
| int result; |
| switch (type) { |
| case ConnectivityManager.TETHERING_WIFI: |
| result = setWifiTethering(enable); |
| if (isProvisioningRequired && result == ConnectivityManager.TETHER_ERROR_NO_ERROR) { |
| scheduleProvisioningRechecks(type); |
| } |
| sendTetherResult(receiver, result); |
| break; |
| case ConnectivityManager.TETHERING_USB: |
| result = setUsbTethering(enable); |
| if (isProvisioningRequired && result == ConnectivityManager.TETHER_ERROR_NO_ERROR) { |
| scheduleProvisioningRechecks(type); |
| } |
| sendTetherResult(receiver, result); |
| break; |
| case ConnectivityManager.TETHERING_BLUETOOTH: |
| setBluetoothTethering(enable, receiver); |
| break; |
| default: |
| Log.w(TAG, "Invalid tether type."); |
| sendTetherResult(receiver, ConnectivityManager.TETHER_ERROR_UNKNOWN_IFACE); |
| } |
| } |
| |
| private void sendTetherResult(ResultReceiver receiver, int result) { |
| if (receiver != null) { |
| receiver.send(result, null); |
| } |
| } |
| |
| private int setWifiTethering(final boolean enable) { |
| int rval = ConnectivityManager.TETHER_ERROR_MASTER_ERROR; |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| synchronized (mPublicSync) { |
| mWifiTetherRequested = enable; |
| final WifiManager mgr = getWifiManager(); |
| if ((enable && mgr.startSoftAp(null /* use existing wifi config */)) || |
| (!enable && mgr.stopSoftAp())) { |
| rval = ConnectivityManager.TETHER_ERROR_NO_ERROR; |
| } |
| } |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| return rval; |
| } |
| |
| 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, ConnectivityManager.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. |
| int result = ((BluetoothPan) proxy).isTetheringOn() == enable ? |
| ConnectivityManager.TETHER_ERROR_NO_ERROR : |
| ConnectivityManager.TETHER_ERROR_MASTER_ERROR; |
| sendTetherResult(receiver, result); |
| if (enable && isTetherProvisioningRequired()) { |
| scheduleProvisioningRechecks(ConnectivityManager.TETHERING_BLUETOOTH); |
| } |
| adapter.closeProfileProxy(BluetoothProfile.PAN, proxy); |
| } |
| }, BluetoothProfile.PAN); |
| } |
| |
| private void runUiTetherProvisioningAndEnable(int type, ResultReceiver receiver) { |
| ResultReceiver proxyReceiver = getProxyReceiver(type, receiver); |
| sendUiTetherProvisionIntent(type, proxyReceiver); |
| } |
| |
| private void sendUiTetherProvisionIntent(int type, ResultReceiver receiver) { |
| Intent intent = new Intent(Settings.ACTION_TETHER_PROVISIONING); |
| intent.putExtra(ConnectivityManager.EXTRA_ADD_TETHER_TYPE, type); |
| intent.putExtra(ConnectivityManager.EXTRA_PROVISION_CALLBACK, receiver); |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| mContext.startActivityAsUser(intent, UserHandle.CURRENT); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| /** |
| * Creates a proxy {@link ResultReceiver} which enables tethering if the provisioning result |
| * is successful before firing back up to the wrapped receiver. |
| * |
| * @param type The type of tethering being enabled. |
| * @param receiver A ResultReceiver which will be called back with an int resultCode. |
| * @return The proxy receiver. |
| */ |
| private ResultReceiver getProxyReceiver(final int type, final ResultReceiver receiver) { |
| ResultReceiver rr = new ResultReceiver(null) { |
| @Override |
| protected void onReceiveResult(int resultCode, Bundle resultData) { |
| // If provisioning is successful, enable tethering, otherwise just send the error. |
| if (resultCode == ConnectivityManager.TETHER_ERROR_NO_ERROR) { |
| enableTetheringInternal(type, true, receiver); |
| } else { |
| sendTetherResult(receiver, resultCode); |
| } |
| } |
| }; |
| |
| // The following is necessary to avoid unmarshalling issues when sending the receiver |
| // across processes. |
| Parcel parcel = Parcel.obtain(); |
| rr.writeToParcel(parcel,0); |
| parcel.setDataPosition(0); |
| ResultReceiver receiverForSending = ResultReceiver.CREATOR.createFromParcel(parcel); |
| parcel.recycle(); |
| return receiverForSending; |
| } |
| |
| private void scheduleProvisioningRechecks(int type) { |
| Intent intent = new Intent(); |
| intent.putExtra(ConnectivityManager.EXTRA_ADD_TETHER_TYPE, type); |
| intent.putExtra(ConnectivityManager.EXTRA_SET_ALARM, true); |
| intent.setComponent(TETHER_SERVICE); |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| mContext.startServiceAsUser(intent, UserHandle.CURRENT); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| private void runSilentTetherProvisioningAndEnable(int type, ResultReceiver receiver) { |
| ResultReceiver proxyReceiver = getProxyReceiver(type, receiver); |
| sendSilentTetherProvisionIntent(type, proxyReceiver); |
| } |
| |
| private void sendSilentTetherProvisionIntent(int type, ResultReceiver receiver) { |
| Intent intent = new Intent(); |
| intent.putExtra(ConnectivityManager.EXTRA_ADD_TETHER_TYPE, type); |
| intent.putExtra(ConnectivityManager.EXTRA_RUN_PROVISION, true); |
| intent.putExtra(ConnectivityManager.EXTRA_PROVISION_CALLBACK, receiver); |
| intent.setComponent(TETHER_SERVICE); |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| mContext.startServiceAsUser(intent, UserHandle.CURRENT); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| private void cancelTetherProvisioningRechecks(int type) { |
| if (getConnectivityManager().isTetheringSupported()) { |
| Intent intent = new Intent(); |
| intent.putExtra(ConnectivityManager.EXTRA_REM_TETHER_TYPE, type); |
| intent.setComponent(TETHER_SERVICE); |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| mContext.startServiceAsUser(intent, UserHandle.CURRENT); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| } |
| |
| // Used by the SIM card change observation code. |
| // TODO: De-duplicate with above code, where possible. |
| private void startProvisionIntent(int tetherType) { |
| final Intent startProvIntent = new Intent(); |
| startProvIntent.putExtra(ConnectivityManager.EXTRA_ADD_TETHER_TYPE, tetherType); |
| startProvIntent.putExtra(ConnectivityManager.EXTRA_RUN_PROVISION, true); |
| startProvIntent.setComponent(TETHER_SERVICE); |
| mContext.startServiceAsUser(startProvIntent, UserHandle.CURRENT); |
| } |
| |
| public int tether(String iface) { |
| return tether(iface, IControlsTethering.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 ConnectivityManager.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 != IControlsTethering.STATE_AVAILABLE) { |
| Log.e(TAG, "Tried to Tether an unavailable iface: " + iface + ", ignoring"); |
| return ConnectivityManager.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.stateMachine.sendMessage( |
| TetherInterfaceStateMachine.CMD_TETHER_REQUESTED, requestedState); |
| return ConnectivityManager.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 ConnectivityManager.TETHER_ERROR_UNKNOWN_IFACE; |
| } |
| if (!tetherState.isCurrentlyServing()) { |
| Log.e(TAG, "Tried to untether an inactive iface :" + iface + ", ignoring"); |
| return ConnectivityManager.TETHER_ERROR_UNAVAIL_IFACE; |
| } |
| tetherState.stateMachine.sendMessage( |
| TetherInterfaceStateMachine.CMD_TETHER_UNREQUESTED); |
| return ConnectivityManager.TETHER_ERROR_NO_ERROR; |
| } |
| } |
| |
| public void untetherAll() { |
| stopTethering(ConnectivityManager.TETHERING_WIFI); |
| stopTethering(ConnectivityManager.TETHERING_USB); |
| stopTethering(ConnectivityManager.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 ConnectivityManager.TETHER_ERROR_UNKNOWN_IFACE; |
| } |
| return tetherState.lastError; |
| } |
| } |
| |
| // TODO: Figure out how to update for local hotspot mode interfaces. |
| private void sendTetherStateChangedBroadcast() { |
| if (!getConnectivityManager().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 != ConnectivityManager.TETHER_ERROR_NO_ERROR) { |
| erroredList.add(iface); |
| } else if (tetherState.lastState == IControlsTethering.STATE_AVAILABLE) { |
| availableList.add(iface); |
| } else if (tetherState.lastState == IControlsTethering.STATE_LOCAL_ONLY) { |
| localOnlyList.add(iface); |
| } else if (tetherState.lastState == IControlsTethering.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(ConnectivityManager.ACTION_TETHER_STATE_CHANGED); |
| bcast.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | |
| Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); |
| bcast.putStringArrayListExtra(ConnectivityManager.EXTRA_AVAILABLE_TETHER, availableList); |
| bcast.putStringArrayListExtra(ConnectivityManager.EXTRA_ACTIVE_LOCAL_ONLY, localOnlyList); |
| bcast.putStringArrayListExtra(ConnectivityManager.EXTRA_ACTIVE_TETHER, tetherList); |
| bcast.putStringArrayListExtra(ConnectivityManager.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) { |
| 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(); |
| 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 (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); |
| } |
| |
| private 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(ConnectivityManager.CONNECTIVITY_ACTION)) { |
| handleConnectivityAction(intent); |
| } else if (action.equals(WifiManager.WIFI_AP_STATE_CHANGED_ACTION)) { |
| handleWifiApAction(intent); |
| } else if (action.equals(Intent.ACTION_CONFIGURATION_CHANGED)) { |
| updateConfiguration(); |
| } |
| } |
| |
| private void handleConnectivityAction(Intent intent) { |
| final NetworkInfo networkInfo = (NetworkInfo)intent.getParcelableExtra( |
| ConnectivityManager.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 . |
| if (usbConnected && !usbConfigured) { |
| // Nothing for us to do here. |
| // TODO: consider ignoring DISCONNECTED broadcasts as well. |
| return; |
| } |
| |
| synchronized (Tethering.this.mPublicSync) { |
| mRndisEnabled = rndisEnabled; |
| // start tethering if we have a request pending |
| if (usbConfigured && mRndisEnabled && mUsbTetherRequested) { |
| tetherMatchingInterfaces( |
| IControlsTethering.STATE_TETHERED, |
| ConnectivityManager.TETHERING_USB); |
| } |
| mUsbTetherRequested = false; |
| } |
| } |
| |
| 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); |
| break; |
| } |
| } |
| } |
| } |
| |
| 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.stateMachine.unwanted(); |
| return; |
| } |
| } |
| |
| for (int i = 0; i < mTetherStates.size(); i++) { |
| TetherInterfaceStateMachine tism = mTetherStates.valueAt(i).stateMachine; |
| if (tism.interfaceType() == ConnectivityManager.TETHERING_WIFI) { |
| tism.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 IControlsTethering serving states, inferring |
| // from mWifiTetherRequested as a final "best guess". |
| final int ipServingMode; |
| switch (wifiIpMode) { |
| case IFACE_IP_MODE_TETHERED: |
| ipServingMode = IControlsTethering.STATE_TETHERED; |
| break; |
| case IFACE_IP_MODE_LOCAL_ONLY: |
| ipServingMode = IControlsTethering.STATE_LOCAL_ONLY; |
| break; |
| default: |
| mLog.e("Cannot enable IP serving in unknown WiFi mode: " + wifiIpMode); |
| return; |
| } |
| |
| if (!TextUtils.isEmpty(ifname)) { |
| maybeTrackNewInterfaceLocked(ifname, ConnectivityManager.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 IControlsTethering.STATE_UNAVAILABLE: |
| case IControlsTethering.STATE_AVAILABLE: |
| result = untether(ifname); |
| break; |
| case IControlsTethering.STATE_TETHERED: |
| case IControlsTethering.STATE_LOCAL_ONLY: |
| result = tether(ifname, requestedState); |
| break; |
| default: |
| Log.wtf(TAG, "Unknown interface state: " + requestedState); |
| return; |
| } |
| if (result != ConnectivityManager.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(); |
| |
| 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); |
| |
| synchronized (mPublicSync) { |
| if (enable) { |
| if (mRndisEnabled) { |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| tetherMatchingInterfaces(IControlsTethering.STATE_TETHERED, |
| ConnectivityManager.TETHERING_USB); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } else { |
| mUsbTetherRequested = true; |
| usbManager.setCurrentFunction(UsbManager.USB_FUNCTION_RNDIS, false); |
| } |
| } else { |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| tetherMatchingInterfaces(IControlsTethering.STATE_AVAILABLE, |
| ConnectivityManager.TETHERING_USB); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| if (mRndisEnabled) { |
| usbManager.setCurrentFunction(null, false); |
| } |
| mUsbTetherRequested = false; |
| } |
| } |
| return ConnectivityManager.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 == IControlsTethering.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 == IControlsTethering.STATE_AVAILABLE) { |
| list.add(mTetherStates.keyAt(i)); |
| } |
| } |
| } |
| return list.toArray(new String[list.size()]); |
| } |
| |
| public String[] getTetheredDhcpRanges() { |
| return mConfig.dhcpRanges; |
| } |
| |
| 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 != ConnectivityManager.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 mUsbTetherRequested || mWifiTetherRequested; |
| } |
| } |
| |
| // Needed because the canonical source of upstream truth is just the |
| // upstream interface name, |mCurrentUpstreamIface|. This is ripe for |
| // future simplification, once the upstream Network is canonical. |
| private boolean pertainsToCurrentUpstream(NetworkState ns) { |
| if (ns != null && ns.linkProperties != null && mCurrentUpstreamIface != null) { |
| for (String ifname : ns.linkProperties.getAllInterfaceNames()) { |
| if (mCurrentUpstreamIface.equals(ifname)) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| private void reevaluateSimCardProvisioning() { |
| if (!hasMobileHotspotProvisionApp()) return; |
| |
| ArrayList<Integer> tethered = new ArrayList<>(); |
| synchronized (mPublicSync) { |
| for (int i = 0; i < mTetherStates.size(); i++) { |
| TetherState tetherState = mTetherStates.valueAt(i); |
| if (tetherState.lastState != IControlsTethering.STATE_TETHERED) { |
| continue; // Skip interfaces that aren't tethered. |
| } |
| String iface = mTetherStates.keyAt(i); |
| int interfaceType = ifaceNameToType(iface); |
| if (interfaceType != ConnectivityManager.TETHERING_INVALID) { |
| tethered.add(interfaceType); |
| } |
| } |
| } |
| |
| for (int tetherType : tethered) { |
| startProvisionIntent(tetherType); |
| } |
| } |
| |
| 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; |
| |
| 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<TetherInterfaceStateMachine> mNotifyList; |
| private final IPv6TetheringCoordinator mIPv6TetheringCoordinator; |
| |
| private static final int UPSTREAM_SETTLE_TIME_MS = 10000; |
| |
| TetherMasterSM(String name, Looper looper) { |
| 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 = new IPv6TetheringCoordinator(mNotifyList, mLog); |
| |
| setInitialState(mInitialState); |
| } |
| |
| private void startOffloadController() { |
| mOffloadController.start(); |
| sendOffloadExemptPrefixes(); |
| } |
| |
| private void sendOffloadExemptPrefixes() { |
| sendOffloadExemptPrefixes(mUpstreamNetworkMonitor.getLocalPrefixes()); |
| } |
| |
| private void sendOffloadExemptPrefixes(Set<IpPrefix> localPrefixes) { |
| // Add in well-known minimum set. |
| PrefixUtils.addNonForwardablePrefixes(localPrefixes); |
| // Add tragically hardcoded prefixes. |
| localPrefixes.add(PrefixUtils.DEFAULT_WIFI_P2P_PREFIX); |
| |
| // Add prefixes for all downstreams, regardless of IP serving mode. |
| for (TetherInterfaceStateMachine tism : mNotifyList) { |
| localPrefixes.addAll(PrefixUtils.localPrefixesFrom(tism.linkProperties())); |
| } |
| |
| mOffloadController.setLocalPrefixes(localPrefixes); |
| } |
| |
| class InitialState extends State { |
| @Override |
| public boolean processMessage(Message message) { |
| logMessage(this, message.what); |
| switch (message.what) { |
| case EVENT_IFACE_SERVING_STATE_ACTIVE: |
| TetherInterfaceStateMachine who = (TetherInterfaceStateMachine) 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: |
| who = (TetherInterfaceStateMachine) 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. |
| try { |
| // TODO: Find a more accurate method name (startDHCPv4()?). |
| mNMService.startTethering(cfg.dhcpRanges); |
| } catch (Exception e) { |
| try { |
| mNMService.stopTethering(); |
| mNMService.startTethering(cfg.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. |
| maybeUpdateConfiguration(); |
| |
| final NetworkState ns = mUpstreamNetworkMonitor.selectPreferredUpstreamType( |
| mConfig.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); |
| } |
| |
| protected void setUpstreamNetwork(NetworkState ns) { |
| String iface = null; |
| if (ns != null && ns.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. |
| mLog.i("Finding IPv4 upstream interface on: " + ns.linkProperties); |
| RouteInfo ipv4Default = RouteInfo.selectBestRoute( |
| ns.linkProperties.getAllRoutes(), Inet4Address.ANY); |
| if (ipv4Default != null) { |
| iface = ipv4Default.getInterface(); |
| mLog.i("Found interface " + ipv4Default.getInterface()); |
| } else { |
| mLog.i("No IPv4 upstream interface, giving up."); |
| } |
| } |
| |
| if (iface != null) { |
| setDnsForwarders(ns.network, ns.linkProperties); |
| } |
| notifyDownstreamsOfNewUpstreamIface(iface); |
| if (ns != null && pertainsToCurrentUpstream(ns)) { |
| // If we already have NetworkState for this network examine |
| // it immediately, because there likely will be no second |
| // EVENT_ON_AVAILABLE (it was already received). |
| handleNewUpstreamNetworkState(ns); |
| } else if (mCurrentUpstreamIface == null) { |
| // There are no available upstream networks, or none that |
| // have an IPv4 default route (current metric for success). |
| 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(String ifaceName) { |
| mLog.log("Notifying downstreams of upstream=" + ifaceName); |
| mCurrentUpstreamIface = ifaceName; |
| for (TetherInterfaceStateMachine sm : mNotifyList) { |
| sm.sendMessage(TetherInterfaceStateMachine.CMD_TETHER_CONNECTION_CHANGED, |
| ifaceName); |
| } |
| } |
| |
| protected void handleNewUpstreamNetworkState(NetworkState ns) { |
| mIPv6TetheringCoordinator.updateUpstreamNetworkState(ns); |
| mOffloadController.setUpstreamLinkProperties((ns != null) ? ns.linkProperties : null); |
| } |
| |
| private void handleInterfaceServingStateActive(int mode, TetherInterfaceStateMachine who) { |
| if (mNotifyList.indexOf(who) < 0) { |
| mNotifyList.add(who); |
| mIPv6TetheringCoordinator.addActiveDownstream(who, mode); |
| } |
| |
| if (mode == IControlsTethering.STATE_TETHERED) { |
| mForwardedDownstreams.add(who); |
| } else { |
| mOffloadController.removeDownstreamInterface(who.interfaceName()); |
| mForwardedDownstreams.remove(who); |
| } |
| |
| // If this is a Wi-Fi interface, notify WifiManager of the active serving state. |
| if (who.interfaceType() == ConnectivityManager.TETHERING_WIFI) { |
| final WifiManager mgr = getWifiManager(); |
| final String iface = who.interfaceName(); |
| switch (mode) { |
| case IControlsTethering.STATE_TETHERED: |
| mgr.updateInterfaceIpState(iface, IFACE_IP_MODE_TETHERED); |
| break; |
| case IControlsTethering.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(TetherInterfaceStateMachine who) { |
| mNotifyList.remove(who); |
| mIPv6TetheringCoordinator.removeActiveDownstream(who); |
| mOffloadController.removeDownstreamInterface(who.interfaceName()); |
| mForwardedDownstreams.remove(who); |
| |
| // If this is a Wi-Fi interface, tell WifiManager of any errors. |
| if (who.interfaceType() == ConnectivityManager.TETHERING_WIFI) { |
| if (who.lastError() != ConnectivityManager.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) { |
| 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 (mCurrentUpstreamIface == 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_AVAILABLE: |
| // The default network changed, or DUN connected |
| // before this callback was processed. Updates |
| // for the current NetworkCapabilities and |
| // LinkProperties have been requested (default |
| // request) or are being sent shortly (DUN). Do |
| // nothing until they arrive; if no updates |
| // arrive there's nothing to do. |
| break; |
| case UpstreamNetworkMonitor.EVENT_ON_CAPABILITIES: |
| handleNewUpstreamNetworkState(ns); |
| break; |
| case UpstreamNetworkMonitor.EVENT_ON_LINKPROPERTIES: |
| setDnsForwarders(ns.network, ns.linkProperties); |
| handleNewUpstreamNetworkState(ns); |
| 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; |
| } |
| |
| mSimChange.startListening(); |
| mUpstreamNetworkMonitor.start(); |
| |
| // TODO: De-duplicate with updateUpstreamWanted() below. |
| if (upstreamWanted()) { |
| mUpstreamWanted = true; |
| startOffloadController(); |
| chooseUpstreamType(true); |
| mTryCell = false; |
| } |
| } |
| |
| @Override |
| public void exit() { |
| mOffloadController.stop(); |
| mUpstreamNetworkMonitor.stop(); |
| mSimChange.stopListening(); |
| notifyDownstreamsOfNewUpstreamIface(null); |
| handleNewUpstreamNetworkState(null); |
| } |
| |
| private boolean updateUpstreamWanted() { |
| final boolean previousUpstreamWanted = mUpstreamWanted; |
| mUpstreamWanted = upstreamWanted(); |
| if (mUpstreamWanted != previousUpstreamWanted) { |
| if (mUpstreamWanted) { |
| startOffloadController(); |
| } else { |
| mOffloadController.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: { |
| TetherInterfaceStateMachine who = (TetherInterfaceStateMachine) message.obj; |
| if (VDBG) Log.d(TAG, "Tether Mode requested by " + who); |
| handleInterfaceServingStateActive(message.arg1, who); |
| who.sendMessage(TetherInterfaceStateMachine.CMD_TETHER_CONNECTION_CHANGED, |
| mCurrentUpstreamIface); |
| // 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: { |
| TetherInterfaceStateMachine who = (TetherInterfaceStateMachine) 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 (TetherInterfaceStateMachine 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 == IControlsTethering.STATE_TETHERED) { |
| mOffloadController.notifyDownstreamLinkProperties(newLp); |
| } else { |
| mOffloadController.removeDownstreamInterface(newLp.getInterfaceName()); |
| // Another interface might be in local-only hotspot mode; |
| // resend all local prefixes to the OffloadController. |
| sendOffloadExemptPrefixes(); |
| } |
| break; |
| } |
| 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: |
| TetherInterfaceStateMachine who = (TetherInterfaceStateMachine) message.obj; |
| who.sendMessage(mErrorNotification); |
| break; |
| case CMD_CLEAR_ERROR: |
| mErrorNotification = ConnectivityManager.TETHER_ERROR_NO_ERROR; |
| transitionTo(mInitialState); |
| break; |
| default: |
| retValue = false; |
| } |
| return retValue; |
| } |
| |
| void notify(int msgType) { |
| mErrorNotification = msgType; |
| for (TetherInterfaceStateMachine sm : mNotifyList) { |
| sm.sendMessage(msgType); |
| } |
| } |
| |
| } |
| |
| class SetIpForwardingEnabledErrorState extends ErrorState { |
| @Override |
| public void enter() { |
| Log.e(TAG, "Error in setIpForwardingEnabled"); |
| notify(TetherInterfaceStateMachine.CMD_IP_FORWARDING_ENABLE_ERROR); |
| } |
| } |
| |
| class SetIpForwardingDisabledErrorState extends ErrorState { |
| @Override |
| public void enter() { |
| Log.e(TAG, "Error in setIpForwardingDisabled"); |
| notify(TetherInterfaceStateMachine.CMD_IP_FORWARDING_DISABLE_ERROR); |
| } |
| } |
| |
| class StartTetheringErrorState extends ErrorState { |
| @Override |
| public void enter() { |
| Log.e(TAG, "Error in startTethering"); |
| notify(TetherInterfaceStateMachine.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(TetherInterfaceStateMachine.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(TetherInterfaceStateMachine.CMD_SET_DNS_FORWARDERS_ERROR); |
| try { |
| mNMService.stopTethering(); |
| } catch (Exception e) {} |
| try { |
| mNMService.setIpForwardingEnabled(false); |
| } catch (Exception e) {} |
| } |
| } |
| } |
| |
| @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(); |
| |
| 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 IControlsTethering.STATE_UNAVAILABLE: |
| pw.print("UnavailableState"); |
| break; |
| case IControlsTethering.STATE_AVAILABLE: |
| pw.print("AvailableState"); |
| break; |
| case IControlsTethering.STATE_TETHERED: |
| pw.print("TetheredState"); |
| break; |
| case IControlsTethering.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: " + mCurrentUpstreamIface); |
| 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 IControlsTethering makeControlCallback(String ifname) { |
| return new IControlsTethering() { |
| @Override |
| public void updateInterfaceState( |
| TetherInterfaceStateMachine who, int state, int lastError) { |
| notifyInterfaceStateChange(ifname, who, state, lastError); |
| } |
| |
| @Override |
| public void updateLinkProperties( |
| TetherInterfaceStateMachine who, LinkProperties newLp) { |
| notifyLinkPropertiesChanged(ifname, who, newLp); |
| } |
| }; |
| } |
| |
| // TODO: Move into TetherMasterSM. |
| private void notifyInterfaceStateChange( |
| String iface, TetherInterfaceStateMachine who, int state, int error) { |
| synchronized (mPublicSync) { |
| final TetherState tetherState = mTetherStates.get(iface); |
| if (tetherState != null && tetherState.stateMachine.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 == IControlsTethering.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 == ConnectivityManager.TETHER_ERROR_MASTER_ERROR) { |
| mTetherMasterSM.sendMessage(TetherMasterSM.CMD_CLEAR_ERROR, who); |
| } |
| int which; |
| switch (state) { |
| case IControlsTethering.STATE_UNAVAILABLE: |
| case IControlsTethering.STATE_AVAILABLE: |
| which = TetherMasterSM.EVENT_IFACE_SERVING_STATE_INACTIVE; |
| break; |
| case IControlsTethering.STATE_TETHERED: |
| case IControlsTethering.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(String iface, TetherInterfaceStateMachine who, |
| LinkProperties newLp) { |
| final int state; |
| synchronized (mPublicSync) { |
| final TetherState tetherState = mTetherStates.get(iface); |
| if (tetherState != null && tetherState.stateMachine.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, IControlsTethering.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 == ConnectivityManager.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 TetherInterfaceStateMachine( |
| iface, mLooper, interfaceType, mLog, mNMService, mStatsService, |
| makeControlCallback(iface))); |
| mTetherStates.put(iface, tetherState); |
| tetherState.stateMachine.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.stateMachine.stop(); |
| mLog.log("removing TetheringInterfaceStateMachine for: " + iface); |
| mTetherStates.remove(iface); |
| } |
| |
| private static String[] copy(String[] strarray) { |
| return Arrays.copyOf(strarray, strarray.length); |
| } |
| } |
