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
021 package org.apache.directory.server.ntp.service;
022
023
024 import org.apache.directory.server.ntp.NtpService;
025 import org.apache.directory.server.ntp.messages.LeapIndicatorType;
026 import org.apache.directory.server.ntp.messages.ModeType;
027 import org.apache.directory.server.ntp.messages.NtpMessage;
028 import org.apache.directory.server.ntp.messages.NtpMessageModifier;
029 import org.apache.directory.server.ntp.messages.NtpTimeStamp;
030 import org.apache.directory.server.ntp.messages.ReferenceIdentifier;
031 import org.apache.directory.server.ntp.messages.StratumType;
032
033
034 /**
035 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
036 * @version $Rev: 501532 $, $Date: 2007-01-30 21:58:55 +0200 (Tue, 30 Jan 2007) $
037 */
038 public class NtpServiceImpl implements NtpService
039 {
040 public NtpMessage getReplyFor( NtpMessage request )
041 {
042 NtpMessageModifier modifier = new NtpMessageModifier();
043
044 modifier.setLeapIndicator( LeapIndicatorType.NO_WARNING );
045 modifier.setVersionNumber( 4 );
046 modifier.setMode( ModeType.SERVER );
047 modifier.setStratum( StratumType.PRIMARY_REFERENCE );
048 modifier.setPollInterval( ( byte ) 0x04 );
049 modifier.setPrecision( ( byte ) 0xFA );
050 modifier.setRootDelay( 0 );
051 modifier.setRootDispersion( 0 );
052 modifier.setReferenceIdentifier( ReferenceIdentifier.LOCL );
053
054 NtpTimeStamp now = new NtpTimeStamp();
055
056 modifier.setReferenceTimestamp( now );
057 modifier.setOriginateTimestamp( request.getTransmitTimestamp() );
058 modifier.setReceiveTimestamp( request.getReceiveTimestamp() );
059 modifier.setTransmitTimestamp( now );
060
061 return modifier.getNtpMessage();
062 }
063 }