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.ntp.service;
022
023
024import org.apache.directory.server.ntp.NtpService;
025import org.apache.directory.server.ntp.messages.LeapIndicatorType;
026import org.apache.directory.server.ntp.messages.ModeType;
027import org.apache.directory.server.ntp.messages.NtpMessage;
028import org.apache.directory.server.ntp.messages.NtpMessageModifier;
029import org.apache.directory.server.ntp.messages.NtpTimeStamp;
030import org.apache.directory.server.ntp.messages.ReferenceIdentifier;
031import org.apache.directory.server.ntp.messages.StratumType;
032
033
034/**
035 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
036 */
037public class NtpServiceImpl implements NtpService
038{
039    public NtpMessage getReplyFor( NtpMessage request )
040    {
041        NtpMessageModifier modifier = new NtpMessageModifier();
042
043        modifier.setLeapIndicator( LeapIndicatorType.NO_WARNING );
044        modifier.setVersionNumber( 4 );
045        modifier.setMode( ModeType.SERVER );
046        modifier.setStratum( StratumType.PRIMARY_REFERENCE );
047        modifier.setPollInterval( ( byte ) 0x04 );
048        modifier.setPrecision( ( byte ) 0xFA );
049        modifier.setRootDelay( 0 );
050        modifier.setRootDispersion( 0 );
051        modifier.setReferenceIdentifier( ReferenceIdentifier.LOCL );
052
053        NtpTimeStamp now = new NtpTimeStamp();
054
055        modifier.setReferenceTimestamp( now );
056        modifier.setOriginateTimestamp( request.getTransmitTimestamp() );
057        modifier.setReceiveTimestamp( request.getReceiveTimestamp() );
058        modifier.setTransmitTimestamp( now );
059
060        return modifier.getNtpMessage();
061    }
062}