Java Local Address Check isLocalAddress(String address)

Description

is Local Address

License

Apache License

Declaration

public static boolean isLocalAddress(String address) throws IOException 

Method Source Code

//package com.java2s;
/**/*  www. j  a v  a 2s .c  o  m*/
*      Copyright (C) 2008 10gen Inc.
*  
*    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.
*/

import java.io.*;
import java.net.*;
import java.util.*;

public class Main {
    public static boolean isLocalAddress(String address) throws IOException {
        if (address == null)
            return false;
        return isLocalAddress(getByName(address));
    }

    public static boolean isLocalAddress(InetAddress ia) throws IOException {

        for (NetworkInterface nic : getNetworkInterfaces()) {
            Enumeration<InetAddress> e = nic.getInetAddresses();
            while (e.hasMoreElements()) {
                InetAddress mine = e.nextElement();
                if (mine.getHostAddress().equals(ia.getHostAddress()))
                    return true;
            }
        }

        return false;
    }

    public static InetAddress getByName(String host) throws UnknownHostException {

        if (host == null)
            throw new NullPointerException("can't lookup null host");

        return InetAddress.getByName(host);
    }

    public static List<NetworkInterface> getNetworkInterfaces() throws java.io.IOException {
        List<NetworkInterface> lst = new ArrayList<NetworkInterface>();

        Enumeration<NetworkInterface> e = NetworkInterface.getNetworkInterfaces();
        while (e.hasMoreElements())
            lst.add(e.nextElement());

        return lst;
    }
}

Related

1. isLocal(String brokerAddress)
2. isLocalAddress(final String addr)
3. isLocalAddress(final String address)
4. isLocalAddress(String address)
5. isLocalAddress(String address)
6. isLocalAddress(String host)
7. isLocalOrLoopback(String address)
8. isLoopbackAddress(String address)