io.netty.channel.socket.InternetProtocolFamily2 Maven / Gradle / Ivy
/*
* Copyright 2012 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:
*
* 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 io.netty.channel.socket;
import io.netty.util.NetUtil;
import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.InetAddress;
/**
* Internet Protocol (IP) families used byte the {@link DatagramChannel}
*/
public enum InternetProtocolFamily2 {
IPv4(Inet4Address.class),
IPv6(Inet6Address.class);
private final Class addressType;
private final int addressNumber;
private final InetAddress localHost;
InternetProtocolFamily2(Class addressType) {
this.addressType = addressType;
addressNumber = addressNumber(addressType);
localHost = localhost(addressType);
}
/**
* Returns the address type of this protocol family.
*/
public Class addressType() {
return addressType;
}
/**
* Returns the
* address number
* of the family.
*/
public int addressNumber() {
return addressNumber;
}
/**
* Returns the {@link InetAddress} that represent the {@code LOCALHOST} for the family.
*/
public InetAddress localhost() {
return localHost;
}
private static InetAddress localhost(Class addressType) {
if (addressType.isAssignableFrom(Inet4Address.class)) {
return NetUtil.LOCALHOST4;
}
if (addressType.isAssignableFrom(Inet6Address.class)) {
return NetUtil.LOCALHOST6;
}
throw new Error();
}
private static int addressNumber(Class addressType) {
if (addressType.isAssignableFrom(Inet4Address.class)) {
return 1;
}
if (addressType.isAssignableFrom(Inet6Address.class)) {
return 2;
}
throw new IllegalArgumentException("addressType " + addressType + " not supported");
}
/**
* Returns the {@link InternetProtocolFamily} for the given {@link InetAddress}.
*/
public static InternetProtocolFamily2 of(InetAddress address) {
if (address instanceof Inet4Address) {
return IPv4;
}
if (address instanceof Inet6Address) {
return IPv6;
}
throw new IllegalArgumentException("address " + address + " not supported");
}
}