src/java/com/android/internal/net/ipsec/ike/net/IkeDefaultNetworkCallback.java

/*
 * 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 android.net.Network;

import java.net.InetAddress;

/**
 * IkeDefaultNetworkCallback is a network callback used to track the platform's default network.
 *
 * <p>This NetworkCallback will notify IkeSessionStateMachine if:
 *
 * <ul>
 *   <li>the default Network changes, or
 *   <li>the local Address for the default Network is dropped,
 *   <li>the default Network dies with no alternatives available.
 * </ul>
 *
 * <p>MUST be registered with {@link android.net.ConnectivityManager} and specify the
 * IkeSessionStateMachine's Handler to prevent races.
 */
public class IkeDefaultNetworkCallback extends IkeNetworkCallbackBase {
    public IkeDefaultNetworkCallback(
            IkeNetworkUpdater ikeNetworkUpdater, Network currNetwork, InetAddress currAddress) {
        super(ikeNetworkUpdater, currNetwork, currAddress);
    }

    @Override
    public void onAvailable(Network network) {
        // This signal can be ignored if the Network is already the current Network
        if (mCurrNetwork.equals(network)) {
            return;
        }

        logd("Platform default Network changed to " + network);
        mIkeNetworkUpdater.onUnderlyingNetworkUpdated(network);
    }
}