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1   //
2   //  ========================================================================
3   //  Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
4   //  ------------------------------------------------------------------------
5   //  All rights reserved. This program and the accompanying materials
6   //  are made available under the terms of the Eclipse Public License v1.0
7   //  and Apache License v2.0 which accompanies this distribution.
8   //
9   //      The Eclipse Public License is available at
10  //      http://www.eclipse.org/legal/epl-v10.html
11  //
12  //      The Apache License v2.0 is available at
13  //      http://www.opensource.org/licenses/apache2.0.php
14  //
15  //  You may elect to redistribute this code under either of these licenses.
16  //  ========================================================================
17  //
18  
19  
20  package org.eclipse.jetty.websocket;
21  
22  
23  public class FixedMaskGen implements MaskGen
24  {
25      private final byte[] _mask;
26  
27      public FixedMaskGen()
28      {
29          this(new byte[]{(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff});
30      }
31  
32      public FixedMaskGen(byte[] mask)
33      {
34          _mask=new byte[4];
35          // Copy to avoid that external code keeps a reference
36          // to the array parameter to modify masking on-the-fly
37          System.arraycopy(mask, 0, _mask, 0, 4);
38      }
39  
40      public void genMask(byte[] mask)
41      {
42          System.arraycopy(_mask, 0, mask, 0, 4);
43      }
44  }