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/*
* 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 OpenSimulator 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.Net;
using Nwc.XmlRpc;
using OpenSim.Framework;
namespace OpenSim.Framework.Servers.HttpServer
{
public class XmlRpcBasicDOSProtector
{
private readonly XmlRpcMethod _normalMethod;
private readonly XmlRpcMethod _throttledMethod;
private readonly BasicDosProtectorOptions _options;
private readonly BasicDOSProtector _dosProtector;
public XmlRpcBasicDOSProtector(XmlRpcMethod normalMethod, XmlRpcMethod throttledMethod,BasicDosProtectorOptions options)
{
_normalMethod = normalMethod;
_throttledMethod = throttledMethod;
_options = options;
_dosProtector = new BasicDOSProtector(_options);
}
public XmlRpcResponse Process(XmlRpcRequest request, IPEndPoint client)
{
XmlRpcResponse resp = null;
string clientstring = GetClientString(request, client);
string endpoint = GetEndPoint(request, client);
if (_dosProtector.Process(clientstring, endpoint))
resp = _normalMethod(request, client);
else
resp = _throttledMethod(request, client);
if (_options.MaxConcurrentSessions > 0)
_dosProtector.ProcessEnd(clientstring, endpoint);
return resp;
}
private string GetClientString(XmlRpcRequest request, IPEndPoint client)
{
string clientstring;
if (_options.AllowXForwardedFor && request.Params.Count > 3)
{
object headerstr = request.Params[3];
if (headerstr != null && !string.IsNullOrEmpty(headerstr.ToString()))
clientstring = request.Params[3].ToString();
else
clientstring = client.Address.ToString();
}
else
clientstring = client.Address.ToString();
return clientstring;
}
private string GetEndPoint(XmlRpcRequest request, IPEndPoint client)
{
return client.Address.ToString();
}
}
}
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