NetUtilInitializations.java — netty Source File

Source Code

/*
 * Copyright 2020 The Netty Project
 *
 * The Netty Project licenses this file to you 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:
 *
 *   https://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 io.netty.util;

import io.netty.util.internal.PlatformDependent;
import io.netty.util.internal.SocketUtils;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;

import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;
import java.util.List;

final class NetUtilInitializations {
    /**
     * The logger being used by this class
     */
    private static final InternalLogger logger = InternalLoggerFactory.getInstance(NetUtilInitializations.class);

    private NetUtilInitializations() {
    }

    static Inet4Address createLocalhost4() {
        byte[] LOCALHOST4_BYTES = {127, 0, 0, 1};

        Inet4Address localhost4 = null;
        try {
            localhost4 = (Inet4Address) InetAddress.getByAddress("localhost", LOCALHOST4_BYTES);
        } catch (Exception e) {
            // We should not get here as long as the length of the address is correct.
            PlatformDependent.throwException(e);
        }

        return localhost4;
    }

    static Inet6Address createLocalhost6() {
        byte[] LOCALHOST6_BYTES = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1};

        Inet6Address localhost6 = null;
// ... (129 more lines)