leap.lang.net.InetAddresses Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of leap-lang Show documentation
The newest version!
/*
 *
 *  * Copyright 2013 the original author or authors.
 *  *
 *  * 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 leap.lang.net;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Enumeration;

/**
 * find local host
 *
 * @author kael.
 */
public class InetAddresses {
    public static InetAddress getLocalHostLANAddress() throws UnknownHostException, SocketException {
        InetAddress candidateAddress = null;
        for(Enumeration ifaces = NetworkInterface.getNetworkInterfaces(); ifaces.hasMoreElements(); ) {
            NetworkInterface iface = (NetworkInterface) ifaces.nextElement();
            for(Enumeration inetAddrs = iface.getInetAddresses(); inetAddrs.hasMoreElements(); ) {
                InetAddress inetAddr = (InetAddress) inetAddrs.nextElement();
                if (!inetAddr.isLoopbackAddress()) {
                    if (inetAddr.isSiteLocalAddress()) {
                        return inetAddr;
                    } else if (candidateAddress == null) {
                        candidateAddress = inetAddr;
                    }
                }
            }
        }
        if (candidateAddress != null) {
            return candidateAddress;
        }
        return InetAddress.getLocalHost();
    }
}