package liquibase.util;

 import java.net.InetAddress;

 import java.net.NetworkInterface;

 import java.net.SocketException;

 import java.net.UnknownHostException;

 import java.util.Enumeration;

 public class NetUtil {

     /**

      * Smarter way to get localhost than InetAddress.getLocalHost. See

      * http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4665037

      */

     public static InetAddress getLocalHost() throws UnknownHostException, SocketException {

         // Windows Vista returns the IPv6 InetAddress using this method, which is not

         // particularly useful as it has no name or useful address, just "0:0:0:0:0:0:0:1".

         // That is why windows should be treated differently to linux/unix and use the

         // default way of getting the localhost.

         String osName = System.getProperty("os.name");

         if (osName != null && osName.toLowerCase().contains("windows")) {

             return InetAddress.getLocalHost();

         }

         InetAddress lch = null;

         Enumeration<NetworkInterface> e = NetworkInterface.getNetworkInterfaces();

         while (e.hasMoreElements()) {

             NetworkInterface i = e.nextElement();

             Enumeration<InetAddress> ie = i.getInetAddresses();

             if (!ie.hasMoreElements()) {

                 break;

             }

             lch = ie.nextElement();

             if (!lch.isLoopbackAddress())

                 break;

         }

         return lch;

     }

 }