1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with this
4 * work for additional information regarding copyright ownership. The ASF
5 * licenses this file to you under the Apache License, Version 2.0 (the
6 * "License"); you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
13 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
14 * License for the specific language governing permissions and limitations under
15 * the License.
16 *
17 */
18
19 package org.apache.directory.server.dhcp.options;
20
21
22 /**
23 * The Dynamic Host Configuration Protocol (DHCP) provides a framework for
24 * passing configuration information to hosts on a TCP/IP network. Configuration
25 * parameters and other control information are carried in tagged data items
26 * that are stored in the 'options' field of the DHCP message. The data items
27 * themselves are also called "options."
28 *
29 * This abstract base class is for options that carry a short value (16 bit).
30 *
31 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
32 */
33 public abstract class IntOption extends DhcpOption
34 {
35 /**
36 * The int value (represented as a long because of the unsignedness).
37 */
38 private long intValue;
39
40
41 /*
42 * @see org.apache.directory.server.dhcp.options.DhcpOption#setData(byte[])
43 */
44 @Override
45 public void setData( byte[] data )
46 {
47 intValue = ( data[0] & 0xff ) << 24 | ( data[1] & 0xff ) << 16
48 | ( data[2] & 0xff ) << 8 | ( data[3] & 0xff );
49 }
50
51
52 /*
53 * @see org.apache.directory.server.dhcp.options.DhcpOption#getData()
54 */
55 @Override
56 public byte[] getData()
57 {
58 return new byte[]
59 { ( byte ) ( intValue >> 24 & 0xff ),
60 ( byte ) ( intValue >> 16 & 0xff ), ( byte ) ( intValue >> 8 & 0xff ),
61 ( byte ) ( intValue & 0xff ) };
62 }
63
64
65 public long getIntValue()
66 {
67 return intValue;
68 }
69
70
71 public void setIntValue( long intValue )
72 {
73 this.intValue = intValue;
74 }
75 }