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.api.util.Strings;
30 import org.apache.directory.server.dns.store.DnsAttribute;
31 import org.apache.mina.core.buffer.IoBuffer;
32
33
34 /**
35 * A decoder for A records. As per RFC 1035
36 *
37 * <pre>
38 * 3.4.1. A RDATA format
39 *
40 * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
41 * | ADDRESS |
42 * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
43 *
44 * where:
45 *
46 * ADDRESS
47 * A 32 bit Internet address.
48 * </pre>
49 *
50 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
51 */
52 public class AddressRecordDecoder implements RecordDecoder
53 {
54 public Map<String, Object> decode( IoBuffer byteBuffer, short length ) throws IOException
55 {
56 Map<String, Object> attributes = new HashMap<>();
57 byte[] addressBytes = new byte[length];
58 byteBuffer.get( addressBytes );
59 attributes.put( Strings.toLowerCaseAscii( DnsAttribute.IP_ADDRESS ), InetAddress.getByAddress( addressBytes ) );
60
61 return attributes;
62 }
63 }