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/* VMInetAddress.java -- Class to model an Internet address

   Copyright (C) 2005  Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2, or (at your option)

any later version.

GNU Classpath is distributed in the hope that it will be useful, but

WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

General Public License for more details.

You should have received a copy of the GNU General Public License

along with GNU Classpath; see the file COPYING.  If not, write to the

Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301 USA.

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

conditions of the GNU General Public License cover the whole

combination.

As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

modules, and to copy and distribute the resulting executable under

terms of your choice, provided that you also meet, for each linked

independent module, the terms and conditions of the license of that

module.  An independent module is a module which is not derived from

or based on this library.  If you modify this library, you may extend

this exception to your version of the library, but you are not

obligated to do so.  If you do not wish to do so, delete this

exception statement from your version. */

package java.net;

import gnu.classpath.Configuration;

import java.io.Serializable;

class VMInetAddress implements Serializable

{

  static

  {

    if (Configuration.INIT_LOAD_LIBRARY)

      System.loadLibrary("javanet");

  }

  /**

   * This method looks up the hostname of the local machine

   * we are on.  If the actual hostname cannot be determined, then the

   * value "localhost" will be used.  This native method wrappers the

   * "gethostname" function.

   *

   * @return The local hostname.

   */

  public static native String getLocalHostname();

  /**

   * Returns the value of the special address INADDR_ANY

   */

  public static native byte[] lookupInaddrAny() throws UnknownHostException;

  /**

   * This method returns the hostname for a given IP address.  It will

   * throw an UnknownHostException if the hostname cannot be determined.

   *

   * @param ip The IP address as a byte array

   *

   * @return The hostname

   *

   * @exception UnknownHostException If the reverse lookup fails

   */

  public static native String getHostByAddr(byte[] ip)

    throws UnknownHostException;

  /**

   * Returns a list of all IP addresses for a given hostname.  Will throw

   * an UnknownHostException if the hostname cannot be resolved.

   */

  public static native byte[][] getHostByName(String hostname)

    throws UnknownHostException;

  /**

   * Return the IP address represented by a literal address.

   * Will return null if the literal address is not valid.

   *

   * @param address the name of the host

   *

   * @return The IP address as a byte array

   */

  public static native byte[] aton(String address);

}