Add the files

ProxyServer/PortMapClient.cs

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+/*
+    Copyright © 2002, The KPD-Team
+    All rights reserved.
+    http://www.mentalis.org/
+
+  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. 
+
+    - Neither the name of the KPD-Team, 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 COPYRIGHT HOLDERS AND CONTRIBUTORS
+  "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 COPYRIGHT OWNER OR 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;
+using System.Net.Sockets;
+using Org.Mentalis.Proxy;
+
+namespace Org.Mentalis.Proxy.PortMap {
+
+///<summary>Relays data between a remote host and a local client.</summary>
+public sealed class PortMapClient : Client {
+	///<summary>Initializes a new instance of the PortMapClient class.</summary>
+	///<param name="ClientSocket">The <see cref ="Socket">Socket</see> connection between this proxy server and the local client.</param>
+	///<param name="Destroyer">The callback method to be called when this Client object disconnects from the local client and the remote server.</param>
+	///<param name="MapTo">The IP EndPoint to send the incoming data to.</param>
+	public PortMapClient(Socket ClientSocket, DestroyDelegate Destroyer, IPEndPoint MapTo) : base(ClientSocket, Destroyer) {
+		this.MapTo = MapTo;
+	}
+	///<summary>Gets or sets the IP EndPoint to map all incoming traffic to.</summary>
+	///<value>An IPEndPoint that holds the IP address and port to use when redirecting incoming traffic.</value>
+	///<exception cref="ArgumentNullException">The specified value is null.</exception>
+	///<returns>An IP EndPoint specifying the host and port to map all incoming traffic to.</returns>
+	private IPEndPoint MapTo {
+		get {
+			return m_MapTo;
+		}
+		set {
+			if (value == null)
+				throw new ArgumentNullException();
+			m_MapTo = value;
+		}
+	}
+	///<summary>Starts connecting to the remote host.</summary>
+	override public void StartHandshake() {
+		try {
+			DestinationSocket = new Socket(MapTo.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
+			DestinationSocket.BeginConnect(MapTo, new AsyncCallback(this.OnConnected), DestinationSocket);
+		} catch {
+			Dispose();
+		}
+	}
+	///<summary>Called when the socket is connected to the remote host.</summary>
+	///<remarks>When the socket is connected to the remote host, the PortMapClient begins relaying traffic between the host and the client, until one of them closes the connection.</remarks>
+	///<param name="ar">The result of the asynchronous operation.</param>
+	private void OnConnected(IAsyncResult ar) {
+		try {
+			DestinationSocket.EndConnect(ar);
+			StartRelay();
+		} catch {
+			Dispose();
+		}
+	}
+	///<summary>Returns text information about this PortMapClient object.</summary>
+	///<returns>A string representing this PortMapClient object.</returns>
+	public override string ToString() {
+		try {
+			return "Forwarding port from " + ((IPEndPoint)ClientSocket.RemoteEndPoint).Address.ToString() + " to " + MapTo.ToString();
+		} catch {
+			return "Incoming Port forward connection";
+		}
+	}
+	// private variables
+	/// <summary>Holds the value of the MapTo property.</summary>
+	private IPEndPoint m_MapTo;
+}
+
+}