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
021package org.apache.directory.server.dhcp.options.dhcp;
022
023
024import org.apache.directory.server.dhcp.options.DhcpOption;
025
026
027/**
028 * This option is used by DHCP clients to specify their unique
029 * identifier.  DHCP servers use this value to index their database of
030 * address bindings.  This value is expected to be unique for all
031 * clients in an administrative domain.
032 * 
033 * Identifiers SHOULD be treated as opaque objects by DHCP servers.
034 * 
035 * The client identifier MAY consist of type-value pairs similar to the
036 * 'htype'/'chaddr' fields. For instance, it MAY consist
037 * of a hardware type and hardware address. In this case the type field
038 * SHOULD be one of the ARP hardware types defined in STD2.  A
039 * hardware type of 0 (zero) should be used when the value field
040 * contains an identifier other than a hardware address (e.g. a fully
041 * qualified domain name).
042 * 
043 * For correct identification of clients, each client's client-
044 * identifier MUST be unique among the client-identifiers used on the
045 * subnet to which the client is attached.  Vendors and system
046 * administrators are responsible for choosing client-identifiers that
047 * meet this requirement for uniqueness.
048 * 
049 * The code for this option is 61, and its minimum length is 2.
050 * 
051 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
052 */
053public class ClientIdentifier extends DhcpOption
054{
055    /*
056     * @see org.apache.directory.server.dhcp.options.DhcpOption#getTag()
057     */
058    public byte getTag()
059    {
060        return 61;
061    }
062}