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
20package org.eclipse.jetty.websocket;
21
22
23public 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}
45