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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.ntp.service;
22  
23  
24  import org.apache.directory.server.ntp.NtpService;
25  import org.apache.directory.server.ntp.messages.LeapIndicatorType;
26  import org.apache.directory.server.ntp.messages.ModeType;
27  import org.apache.directory.server.ntp.messages.NtpMessage;
28  import org.apache.directory.server.ntp.messages.NtpMessageModifier;
29  import org.apache.directory.server.ntp.messages.NtpTimeStamp;
30  import org.apache.directory.server.ntp.messages.ReferenceIdentifier;
31  import org.apache.directory.server.ntp.messages.StratumType;
32  
33  
34  /**
35   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
36   * @version $Rev: 501532 $, $Date: 2007-01-30 20:58:55 +0100 (Di, 30 Jan 2007) $
37   */
38  public class NtpServiceImpl implements NtpService
39  {
40      public NtpMessage getReplyFor( NtpMessage request )
41      {
42          NtpMessageModifier modifier = new NtpMessageModifier();
43  
44          modifier.setLeapIndicator( LeapIndicatorType.NO_WARNING );
45          modifier.setVersionNumber( 4 );
46          modifier.setMode( ModeType.SERVER );
47          modifier.setStratum( StratumType.PRIMARY_REFERENCE );
48          modifier.setPollInterval( ( byte ) 0x04 );
49          modifier.setPrecision( ( byte ) 0xFA );
50          modifier.setRootDelay( 0 );
51          modifier.setRootDispersion( 0 );
52          modifier.setReferenceIdentifier( ReferenceIdentifier.LOCL );
53  
54          NtpTimeStamp now = new NtpTimeStamp();
55  
56          modifier.setReferenceTimestamp( now );
57          modifier.setOriginateTimestamp( request.getTransmitTimestamp() );
58          modifier.setReceiveTimestamp( request.getReceiveTimestamp() );
59          modifier.setTransmitTimestamp( now );
60  
61          return modifier.getNtpMessage();
62      }
63  }