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 */
020package org.apache.directory.shared.kerberos.codec.hostAddresses.actions;
021
022
023import org.apache.directory.api.asn1.DecoderException;
024import org.apache.directory.api.asn1.ber.Asn1Decoder;
025import org.apache.directory.api.asn1.ber.grammar.GrammarAction;
026import org.apache.directory.api.asn1.ber.tlv.TLV;
027import org.apache.directory.api.i18n.I18n;
028import org.apache.directory.shared.kerberos.codec.hostAddress.HostAddressContainer;
029import org.apache.directory.shared.kerberos.codec.hostAddresses.HostAddressesContainer;
030import org.apache.directory.shared.kerberos.components.HostAddress;
031import org.slf4j.Logger;
032import org.slf4j.LoggerFactory;
033
034
035/**
036 * The action used to add an HostAddresses object
037 *
038 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
039 */
040public class AddHostAddress extends GrammarAction<HostAddressesContainer>
041{
042    /** The logger */
043    private static final Logger LOG = LoggerFactory.getLogger( AddHostAddress.class );
044
045    /** Speedup for logs */
046    private static final boolean IS_DEBUG = LOG.isDebugEnabled();
047
048
049    /**
050     * Instantiates a new AddHostAddress action.
051     */
052    public AddHostAddress()
053    {
054        super( "Add an HostAddress instance" );
055    }
056
057
058    /**
059     * {@inheritDoc}
060     */
061    public void action( HostAddressesContainer hostAddressesContainer ) throws DecoderException
062    {
063        TLV tlv = hostAddressesContainer.getCurrentTLV();
064
065        // The Length should not be null
066        if ( tlv.getLength() == 0 )
067        {
068            LOG.error( I18n.err( I18n.ERR_01308_ZERO_LENGTH_TLV ) );
069
070            // This will generate a PROTOCOL_ERROR
071            throw new DecoderException( I18n.err( I18n.ERR_01309_EMPTY_TLV ) );
072        }
073
074        // Now, let's decode the HostAddress
075        HostAddressContainer hostAddressContainer = new HostAddressContainer();
076        hostAddressContainer.setStream( hostAddressesContainer.getStream() );
077
078        // Compute the start position in the stream for the HostAdress to decode :
079        // We have to move back to the HostAddress tag
080        hostAddressesContainer.rewind();
081
082        // Decode the HostAddress PDU
083        Asn1Decoder.decode( hostAddressesContainer.getStream(), hostAddressContainer );
084
085        // Update the expected length for the current TLV
086        tlv.setExpectedLength( tlv.getExpectedLength() - tlv.getLength() );
087
088        // Update the parent
089        hostAddressesContainer.updateParent();
090
091        // Store the hostAddress in the container
092        HostAddress hostAddress = hostAddressContainer.getHostAddress();
093        hostAddressesContainer.addHostAddress( hostAddress );
094
095        if ( IS_DEBUG )
096        {
097            LOG.debug( "HostAddress added : {}", hostAddress );
098        }
099
100        hostAddressesContainer.setGrammarEndAllowed( true );
101    }
102}