001    /*
002     *  Licensed to the Apache Software Foundation (ASF) under one
003     *  or more contributor license agreements.  See the NOTICE file
004     *  distributed with this work for additional information
005     *  regarding copyright ownership.  The ASF licenses this file
006     *  to you under the Apache License, Version 2.0 (the
007     *  "License"); you may not use this file except in compliance
008     *  with the License.  You may obtain a copy of the License at
009     *  
010     *    http://www.apache.org/licenses/LICENSE-2.0
011     *  
012     *  Unless required by applicable law or agreed to in writing,
013     *  software distributed under the License is distributed on an
014     *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     *  KIND, either express or implied.  See the License for the
016     *  specific language governing permissions and limitations
017     *  under the License. 
018     *  
019     */
020    
021    package org.apache.directory.server.dhcp.options.dhcp;
022    
023    
024    import java.net.InetAddress;
025    
026    import org.apache.directory.server.dhcp.options.AddressOption;
027    
028    
029    /**
030     * This option is used in DHCPOFFER and DHCPREQUEST messages, and may
031     * optionally be included in the DHCPACK and DHCPNAK messages.  DHCP
032     * servers include this option in the DHCPOFFER in order to allow the
033     * client to distinguish between lease offers.  DHCP clients use the
034     * contents of the 'server identifier' field as the destination address
035     * for any DHCP messages unicast to the DHCP server.  DHCP clients also
036     * indicate which of several lease offers is being accepted by including
037     * this option in a DHCPREQUEST message.
038     * 
039     * The identifier is the IP address of the selected server.
040     * 
041     * The code for this option is 54, and its length is 4.
042     * 
043     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
044     * @version $Rev: 638228 $, $Date: 2008-03-18 08:12:41 +0200 (Tue, 18 Mar 2008) $
045     */
046    public class ServerIdentifier extends AddressOption
047    {
048        public ServerIdentifier()
049        {
050        }
051    
052    
053        public ServerIdentifier(InetAddress localHost)
054        {
055            setAddress( localHost );
056        }
057    
058    
059        /*
060         * @see org.apache.directory.server.dhcp.options.DhcpOption#getTag()
061         */
062        public byte getTag()
063        {
064            return 54;
065        }
066    }