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.dns.io.decoder;
22
23
24 import java.io.IOException;
25 import java.net.InetAddress;
26 import java.util.HashMap;
27 import java.util.Map;
28
29 import org.apache.directory.server.dns.store.DnsAttribute;
30 import org.apache.mina.common.ByteBuffer;
31
32
33 /**
34 * A decoder for A records. As per RFC 1035
35 *
36 * <pre>
37 * 3.4.1. A RDATA format
38 *
39 * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
40 * | ADDRESS |
41 * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
42 *
43 * where:
44 *
45 * ADDRESS
46 * A 32 bit Internet address.
47 * </pre>
48 *
49 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
50 * @version $Rev$, $Date$
51 */
52 public class AddressRecordDecoder implements RecordDecoder
53 {
54 public Map<String, Object> decode( ByteBuffer byteBuffer, short length ) throws IOException
55 {
56 Map<String, Object> attributes = new HashMap<String, Object>();
57 byte[] addressBytes = new byte[length];
58 byteBuffer.get( addressBytes );
59 attributes.put( DnsAttribute.IP_ADDRESS, InetAddress.getByAddress( addressBytes ) );
60 return attributes;
61 }
62 }