Java Network Interface Get getNonLoopbackLocalAdresses()

Description

Returns list of machine assigned IP addresses excluding localhost/127.0.0.1

License

Open Source License

Declaration

public static InetAddress[] getNonLoopbackLocalAdresses() 

Method Source Code

//package com.java2s;
/**/*  w ww  . j a  v  a2 s . c om*/
 * Aptana Studio
 * Copyright (c) 2005-2011 by Appcelerator, Inc. All Rights Reserved.
 * Licensed under the terms of the GNU Public License (GPL) v3 (with exceptions).
 * Please see the license.html included with this distribution for details.
 * Any modifications to this file must keep this entire header intact.
 */

import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.NetworkInterface;

import java.net.SocketException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;

public class Main {
    /**
     * Returns list of machine assigned IP addresses excluding localhost/127.0.0.1
     * 
     * @return
     */
    public static InetAddress[] getNonLoopbackLocalAdresses() {
        List<InetAddress> addrs = new ArrayList<InetAddress>();
        for (InetAddress inetAddr : getLocalAddresses()) {
            if (!inetAddr.isLoopbackAddress()) {
                if (isPublic(inetAddr)) {
                    addrs.add(0, inetAddr);
                } else {
                    addrs.add(inetAddr);
                }
            }
        }
        return addrs.toArray(new InetAddress[addrs.size()]);
    }

    /**
     * Returns list of machine assigned IP addresses
     * 
     * @return
     */
    public static InetAddress[] getLocalAddresses() {
        List<InetAddress> addrs = new ArrayList<InetAddress>();
        try {
            for (Enumeration<NetworkInterface> e1 = NetworkInterface.getNetworkInterfaces(); e1
                    .hasMoreElements();) {
                NetworkInterface iface = e1.nextElement();
                for (Enumeration<InetAddress> e2 = iface.getInetAddresses(); e2.hasMoreElements();) {
                    InetAddress inetAddr = e2.nextElement();
                    if (inetAddr instanceof Inet4Address) {
                        if (!addrs.contains(inetAddr)) {
                            if (!inetAddr.isLoopbackAddress()) {
                                addrs.add(0, inetAddr);
                            } else {
                                addrs.add(inetAddr);
                            }
                        }
                    }
                }
            }
        } catch (SocketException ignore) {
        }
        return addrs.toArray(new InetAddress[addrs.size()]);
    }

    private static boolean isPublic(InetAddress inetAddress) {
        String hostAddress = inetAddress.getHostAddress();
        if (hostAddress.startsWith("10.") //$NON-NLS-1$
                || hostAddress.startsWith("192.168.") //$NON-NLS-1$
                || hostAddress.startsWith("169.254.") //$NON-NLS-1$
                || hostAddress.startsWith("127.")) { //$NON-NLS-1$
            return false;
        }
        if (hostAddress.startsWith("172.")) { //$NON-NLS-1$
            return !(inetAddress.getAddress()[1] >= 16 && inetAddress.getAddress()[1] <= 31);
        }
        return true;
    }
}

Related

1. getNetworkInterfaces()
2. getNetworkInterfaces()
3. getNetworkInterfaces()
4. getNetworkInterfaces()
5. getNIOMulticastMethod()
6. getNonLoopbackNetworkInterface()
7. getPublicInterface()
8. getUsualNetworkInterfaces()
9. isActive(String niName)