001/*
002 *  Licensed to the Apache Software Foundation (ASF) under one
003 *  or more contributor license agreements.  See the NOTICE file
004 *  distributed with this work for additional information
005 *  regarding copyright ownership.  The ASF licenses this file
006 *  to you under the Apache License, Version 2.0 (the
007 *  "License"); you may not use this file except in compliance
008 *  with the License.  You may obtain a copy of the License at
009 *  
010 *    http://www.apache.org/licenses/LICENSE-2.0
011 *  
012 *  Unless required by applicable law or agreed to in writing,
013 *  software distributed under the License is distributed on an
014 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 *  KIND, either express or implied.  See the License for the
016 *  specific language governing permissions and limitations
017 *  under the License. 
018 *  
019 */
020
021package org.apache.directory.server.dns.io.decoder;
022
023
024import java.io.IOException;
025import java.net.InetAddress;
026import java.util.HashMap;
027import java.util.Map;
028
029import org.apache.directory.api.util.Strings;
030import org.apache.directory.server.dns.store.DnsAttribute;
031import org.apache.mina.core.buffer.IoBuffer;
032
033
034/**
035 * A decoder for AAAA records.  AAAA records are encoded as per RFC-3596:
036 * 
037 * <pre>
038 *   2.2. AAAA data format
039 *
040 *     A 128 bit IPv6 address is encoded in the data portion of an AAAA
041 *     resource record in network byte order (high-order byte first).
042 * </pre>
043 * 
044 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
045 */
046public class IPv6RecordDecoder implements RecordDecoder
047{
048
049    public Map<String, Object> decode( IoBuffer byteBuffer, short length ) throws IOException
050    {
051        Map<String, Object> attributes = new HashMap<>();
052        byte[] addressBytes = new byte[length];
053        byteBuffer.get( addressBytes );
054        attributes.put( Strings.toLowerCaseAscii( DnsAttribute.IP_ADDRESS ), InetAddress.getByAddress( addressBytes ) );
055        
056        return attributes;
057    }
058
059}