mirror of
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95 lines
4 KiB
C#
95 lines
4 KiB
C#
/*
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Copyright © 2002, The KPD-Team
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All rights reserved.
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http://www.mentalis.org/
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Neither the name of the KPD-Team, nor the names of its contributors
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may be used to endorse or promote products derived from this
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software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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using System;
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using System.Net;
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using System.Net.Sockets;
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using Org.Mentalis.Proxy;
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namespace Org.Mentalis.Proxy.PortMap {
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///<summary>Relays data between a remote host and a local client.</summary>
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public sealed class PortMapClient : Client {
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///<summary>Initializes a new instance of the PortMapClient class.</summary>
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///<param name="ClientSocket">The <see cref ="Socket">Socket</see> connection between this proxy server and the local client.</param>
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///<param name="Destroyer">The callback method to be called when this Client object disconnects from the local client and the remote server.</param>
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///<param name="MapTo">The IP EndPoint to send the incoming data to.</param>
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public PortMapClient(Socket ClientSocket, DestroyDelegate Destroyer, IPEndPoint MapTo) : base(ClientSocket, Destroyer) {
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this.MapTo = MapTo;
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}
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///<summary>Gets or sets the IP EndPoint to map all incoming traffic to.</summary>
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///<value>An IPEndPoint that holds the IP address and port to use when redirecting incoming traffic.</value>
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///<exception cref="ArgumentNullException">The specified value is null.</exception>
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///<returns>An IP EndPoint specifying the host and port to map all incoming traffic to.</returns>
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private IPEndPoint MapTo {
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get {
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return m_MapTo;
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}
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set {
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if (value == null)
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throw new ArgumentNullException();
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m_MapTo = value;
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}
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}
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///<summary>Starts connecting to the remote host.</summary>
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override public void StartHandshake() {
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try {
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DestinationSocket = new Socket(MapTo.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
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DestinationSocket.BeginConnect(MapTo, new AsyncCallback(this.OnConnected), DestinationSocket);
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} catch {
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Dispose();
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}
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}
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///<summary>Called when the socket is connected to the remote host.</summary>
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///<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>
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///<param name="ar">The result of the asynchronous operation.</param>
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private void OnConnected(IAsyncResult ar) {
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try {
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DestinationSocket.EndConnect(ar);
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StartRelay();
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} catch {
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Dispose();
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}
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}
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///<summary>Returns text information about this PortMapClient object.</summary>
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///<returns>A string representing this PortMapClient object.</returns>
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public override string ToString() {
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try {
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return "Forwarding port from " + ((IPEndPoint)ClientSocket.RemoteEndPoint).Address.ToString() + " to " + MapTo.ToString();
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} catch {
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return "Incoming Port forward connection";
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}
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}
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// private variables
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/// <summary>Holds the value of the MapTo property.</summary>
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private IPEndPoint m_MapTo;
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}
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}
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