| /* |
| * Copyright (C) 2020 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.internal.net.ipsec.ike.net; |
| |
| import static android.net.ipsec.ike.IkeManager.getIkeLog; |
| |
| import android.net.ConnectivityManager.NetworkCallback; |
| import android.net.LinkAddress; |
| import android.net.LinkProperties; |
| import android.net.Network; |
| import android.net.NetworkCapabilities; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| |
| import java.net.InetAddress; |
| |
| /** IkeNetworkCallbackBase is a template for IKE-specific NetworkCallback implementations. */ |
| public abstract class IkeNetworkCallbackBase extends NetworkCallback { |
| private static final String TAG = IkeNetworkCallbackBase.class.getSimpleName(); |
| |
| protected final IkeNetworkUpdater mIkeNetworkUpdater; |
| protected Network mCurrNetwork; |
| protected LinkProperties mCurrLp; |
| protected NetworkCapabilities mCurrNc; |
| protected InetAddress mCurrAddress; |
| |
| protected IkeNetworkCallbackBase( |
| IkeNetworkUpdater ikeNetworkUpdater, |
| Network currNetwork, |
| InetAddress currAddress, |
| LinkProperties currLp, |
| NetworkCapabilities currNc) { |
| mIkeNetworkUpdater = ikeNetworkUpdater; |
| mCurrNetwork = currNetwork; |
| mCurrLp = currLp; |
| mCurrNc = currNc; |
| mCurrAddress = currAddress; |
| } |
| |
| @Override |
| public void onLost(Network network) { |
| // This Network loss is only meaningful if it's for the current Network |
| if (!mCurrNetwork.equals(network)) { |
| return; |
| } |
| |
| logd("onLost invoked for current Network " + mCurrNetwork); |
| mIkeNetworkUpdater.onUnderlyingNetworkDied(); |
| } |
| |
| protected boolean isCurrentAddressLost(LinkProperties linkProperties) { |
| if (mCurrAddress == null) { |
| return true; |
| } |
| |
| // Use getAllLinkAddresses (instead of getLinkAddresses()) so that the return value also |
| // includes addresses of stacked LinkProperties. This is useful for handling the address of |
| // a CLAT interface. |
| for (LinkAddress linkAddress : linkProperties.getAllLinkAddresses()) { |
| if (mCurrAddress.equals(linkAddress.getAddress())) { |
| return false; |
| } |
| } |
| |
| logd( |
| "onLinkPropertiesChanged indicates current address " |
| + mCurrAddress |
| + " lost on current Network " |
| + mCurrNetwork.getNetId()); |
| return true; |
| } |
| |
| /** |
| * Sets the current Network that this NetworkCallback is monitoring for. |
| * |
| * <p>MUST be called on the Handler specified when registering this NetworkCallback with {@link |
| * ConnectivityManager}. |
| */ |
| public void setNetwork(Network network, LinkProperties lp, NetworkCapabilities nc) { |
| mCurrNetwork = network; |
| mCurrLp = lp; |
| mCurrNc = nc; |
| mCurrAddress = null; |
| } |
| |
| /** Returns the current Network that this NetworkCallback is monitoring for. */ |
| @VisibleForTesting |
| public Network getNetwork() { |
| return mCurrNetwork; |
| } |
| |
| /** |
| * Sets the current address that this NetworkCallback is monitoring for. |
| * |
| * <p>MUST be called on the Handler specified when registering this NetworkCallback with {@link |
| * ConnectivityManager}. |
| */ |
| public void setAddress(InetAddress address) { |
| mCurrAddress = address; |
| } |
| |
| /** Returns the current Address that this NetworkCallback is monitoring for. */ |
| @VisibleForTesting |
| public InetAddress getAddress() { |
| return mCurrAddress; |
| } |
| |
| protected void logd(String msg) { |
| getIkeLog().d(TAG, msg); |
| } |
| |
| protected void logWtf(String msg) { |
| getIkeLog().wtf(TAG, msg); |
| } |
| } |