69 lines
2.8 KiB
C#
69 lines
2.8 KiB
C#
/*
|
|
* Copyright (c) Contributors, http://opensimulator.org/
|
|
* See CONTRIBUTORS.TXT for a full list of copyright holders.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* * Neither the name of the OpenSim Project nor the
|
|
* names of its contributors may be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
|
|
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
|
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
using System;
|
|
using System.Net;
|
|
|
|
namespace OpenSim.Framework
|
|
{
|
|
public sealed class ProxyCodec
|
|
{
|
|
public static void EncodeProxyMessage(byte[] bytes, ref int numBytes, EndPoint trueEP)
|
|
{
|
|
if (numBytes > 4090) // max UPD size = 4096
|
|
{
|
|
throw new Exception("ERROR: No space to encode the proxy EP");
|
|
}
|
|
|
|
ushort port = (ushort) ((IPEndPoint) trueEP).Port;
|
|
bytes[numBytes++] = (byte) (port % 256);
|
|
bytes[numBytes++] = (byte) (port / 256);
|
|
|
|
foreach (byte b in ((IPEndPoint) trueEP).Address.GetAddressBytes())
|
|
{
|
|
bytes[numBytes++] = b;
|
|
}
|
|
}
|
|
|
|
public static IPEndPoint DecodeProxyMessage(byte[] bytes, ref int numBytes)
|
|
{
|
|
// IPv4 Only
|
|
byte[] addr = new byte[4];
|
|
|
|
addr[3] = bytes[--numBytes];
|
|
addr[2] = bytes[--numBytes];
|
|
addr[1] = bytes[--numBytes];
|
|
addr[0] = bytes[--numBytes];
|
|
|
|
ushort port = (ushort) (bytes[--numBytes] * 256);
|
|
port += (ushort) bytes[--numBytes];
|
|
|
|
return new IPEndPoint(new IPAddress(addr), (int) port);
|
|
}
|
|
}
|
|
}
|