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1   /*
2    *  Licensed to the Apache Software Foundation (ASF) under one
3    *  or more contributor license agreements.  See the NOTICE file
4    *  distributed with this work for additional information
5    *  regarding copyright ownership.  The ASF licenses this file
6    *  to you under the Apache License, Version 2.0 (the
7    *  "License"); you may not use this file except in compliance
8    *  with the License.  You may obtain a copy of the License at
9    *  
10   *    http://www.apache.org/licenses/LICENSE-2.0
11   *  
12   *  Unless required by applicable law or agreed to in writing,
13   *  software distributed under the License is distributed on an
14   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   *  KIND, either express or implied.  See the License for the
16   *  specific language governing permissions and limitations
17   *  under the License. 
18   *  
19   */
20  
21  package org.apache.directory.server.dhcp.options.dhcp;
22  
23  
24  import org.apache.directory.server.dhcp.options.DhcpOption;
25  
26  
27  /**
28   * This option is used by DHCP clients to specify their unique
29   * identifier.  DHCP servers use this value to index their database of
30   * address bindings.  This value is expected to be unique for all
31   * clients in an administrative domain.
32   * 
33   * Identifiers SHOULD be treated as opaque objects by DHCP servers.
34   * 
35   * The client identifier MAY consist of type-value pairs similar to the
36   * 'htype'/'chaddr' fields. For instance, it MAY consist
37   * of a hardware type and hardware address. In this case the type field
38   * SHOULD be one of the ARP hardware types defined in STD2.  A
39   * hardware type of 0 (zero) should be used when the value field
40   * contains an identifier other than a hardware address (e.g. a fully
41   * qualified domain name).
42   * 
43   * For correct identification of clients, each client's client-
44   * identifier MUST be unique among the client-identifiers used on the
45   * subnet to which the client is attached.  Vendors and system
46   * administrators are responsible for choosing client-identifiers that
47   * meet this requirement for uniqueness.
48   * 
49   * The code for this option is 61, and its minimum length is 2.
50   * 
51   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
52   * @version $Rev: 638228 $, $Date: 2008-03-18 07:12:41 +0100 (Di, 18 Mär 2008) $
53   */
54  public class ClientIdentifier extends DhcpOption
55  {
56      /*
57       * @see org.apache.directory.server.dhcp.options.DhcpOption#getTag()
58       */
59      public byte getTag()
60      {
61          return 61;
62      }
63  }