77 lines
2.4 KiB
Java
77 lines
2.4 KiB
Java
/*
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* Copyright 2012 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.channel.socket;
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import io.netty.util.NetUtil;
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import java.net.Inet4Address;
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import java.net.Inet6Address;
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import java.net.InetAddress;
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/**
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* Internet Protocol (IP) families used byte the {@link DatagramChannel}
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*/
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public enum InternetProtocolFamily {
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IPv4(Inet4Address.class, 1, NetUtil.LOCALHOST4),
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IPv6(Inet6Address.class, 2, NetUtil.LOCALHOST6);
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private final Class<? extends InetAddress> addressType;
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private final int addressNumber;
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private final InetAddress localHost;
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InternetProtocolFamily(Class<? extends InetAddress> addressType, int addressNumber, InetAddress localHost) {
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this.addressType = addressType;
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this.addressNumber = addressNumber;
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this.localHost = localHost;
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}
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/**
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* Returns the address type of this protocol family.
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*/
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public Class<? extends InetAddress> addressType() {
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return addressType;
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}
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/**
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* Returns the
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* <a href="http://www.iana.org/assignments/address-family-numbers/address-family-numbers.xhtml">address number</a>
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* of the family.
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*/
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public int addressNumber() {
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return addressNumber;
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}
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/**
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* Returns the {@link InetAddress} that represent the {@code LOCALHOST} for the family.
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*/
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public InetAddress localhost() {
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return localHost;
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}
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/**
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* Returns the {@link InternetProtocolFamily} for the given {@link InetAddress}.
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*/
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public static InternetProtocolFamily of(InetAddress address) {
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if (address instanceof Inet4Address) {
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return IPv4;
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}
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if (address instanceof Inet6Address) {
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return IPv6;
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}
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throw new IllegalArgumentException("address " + address + " not supported");
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}
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}
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