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;
22
23
24 /**
25 * The Dynamic Host Configuration Protocol (DHCP) provides a framework for
26 * passing configuration information to hosts on a TCP/IP network. Configuration
27 * parameters and other control information are carried in tagged data items
28 * that are stored in the 'options' field of the DHCP message. The data items
29 * themselves are also called "options."
30 *
31 * This abstract base class is for options that carry an unsigned short value
32 * (16 bit).
33 *
34 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
35 */
36 public abstract class ShortOption extends DhcpOption
37 {
38 /**
39 * The short value (represented as an int because of the unsignedness).
40 */
41 private int shortValue;
42
43
44 /*
45 * @see org.apache.directory.server.dhcp.options.DhcpOption#setData(byte[])
46 */
47 @Override
48 public void setData( byte[] data )
49 {
50 shortValue = ( data[0] & 0xff ) << 8 | ( data[1] & 0xff );
51 }
52
53
54 /*
55 * @see org.apache.directory.server.dhcp.options.DhcpOption#getData()
56 */
57 @Override
58 public byte[] getData()
59 {
60 return new byte[]
61 { ( byte ) ( shortValue >> 8 & 0xff ),
62 ( byte ) ( shortValue & 0xff ) };
63 }
64
65
66 public int getShortValue()
67 {
68 return shortValue;
69 }
70
71
72 public void setShortValue( int shortValue )
73 {
74 this.shortValue = shortValue;
75 }
76 }