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Viewing changes to external/ikvm/debugger/JdwpConnection.cs

  • Committer: Package Import Robot
  • Author(s): Jo Shields
  • Date: 2013-05-12 09:46:03 UTC
  • mto: This revision was merged to the branch mainline in revision 29.
  • Revision ID: package-import@ubuntu.com-20130512094603-mad323bzcxvmcam0
Tags: upstream-4.0.5+dfsg
Import upstream version 4.0.5+dfsg

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external/ikvm/debugger/JdwpConnection.cs
 
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/*
 
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  Copyright (C) 2009 Volker Berlin (vberlin@inetsoftware.de)
 
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  This software is provided 'as-is', without any express or implied
 
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  warranty.  In no event will the authors be held liable for any damages
 
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  arising from the use of this software.
 
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  Permission is granted to anyone to use this software for any purpose,
 
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  including commercial applications, and to alter it and redistribute it
 
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  freely, subject to the following restrictions:
 
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  1. The origin of this software must not be misrepresented; you must not
 
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     claim that you wrote the original software. If you use this software
 
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     in a product, an acknowledgment in the product documentation would be
 
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     appreciated but is not required.
 
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  2. Altered source versions must be plainly marked as such, and must not be
 
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     misrepresented as being the original software.
 
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  3. This notice may not be removed or altered from any source distribution.
 
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  Jeroen Frijters
 
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  jeroen@frijters.net
 
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*/
 
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using System;
 
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using System.Collections.Generic;
 
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using System.IO;
 
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using System.Net;
 
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using System.Net.Sockets;
 
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using System.Text;
 
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namespace ikvm.debugger
 
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{
 
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    class JdwpConnection
 
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    {
 
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        private readonly JdwpParameters parameters;
 
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        private TcpClient client;
 
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        Stream stream;
 
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        /// <summary>
 
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        /// Shared buffer for reading and monitor for reading
 
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        /// </summary>
 
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        private readonly byte[] readHeader = new byte[11];
 
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        private readonly Object writeMonitor = new Object();
 
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        internal JdwpConnection(JdwpParameters parameters)
 
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        {
 
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            this.parameters = parameters;
 
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        }
 
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        internal void Connect()
 
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        {
 
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            if (parameters.Server)
 
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            {
 
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                IPHostEntry ipEntry = Dns.GetHostEntry(parameters.Host);
 
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                IPAddress ipAddress = ipEntry.AddressList[0];
 
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                TcpListener listener = new TcpListener(ipAddress, parameters.Port);
 
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                listener.Start();
 
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                client = listener.AcceptTcpClient();
 
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            }
 
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            else
 
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            {
 
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                client = new TcpClient(parameters.Host, parameters.Port);
 
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            }
 
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            stream = client.GetStream(); //TODO Bug in BufferedStream, work not asynchron
 
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            //stream = new BufferedStream(client.GetStream());
 
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            System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding();
 
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            byte[] hello = encoding.GetBytes("JDWP-Handshake");
 
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            stream.Write(hello, 0, hello.Length);
 
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            byte[] b = new byte[hello.Length];
 
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            int received = 0;
 
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            while (received < b.Length)
 
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            {
 
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                int n = stream.Read(b, received, b.Length - received);
 
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                if (n < 0)
 
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                {
 
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                    client.Close();
 
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                    Console.WriteLine("handshake failed - connection prematurally closed");
 
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                    Environment.Exit(2);
 
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                }
 
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                received += n;
 
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            }
 
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            for (int j = 0; j < hello.Length; j++)
 
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            {
 
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                if (b[j] != hello[j])
 
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                {
 
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                    client.Close();
 
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                    Console.WriteLine("handshake failed - unrecognized message from target VM");
 
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                    Environment.Exit(2);
 
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                }
 
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            }
 
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        }
 
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        internal Packet ReadPacket()
 
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        {
 
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            lock (readHeader)
 
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            {
 
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                DebuggerUtils.ReadFully(stream, readHeader);
 
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                return Packet.Read(readHeader, stream);
 
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            }
 
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        }
 
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        internal void SendPacket(Packet packet)
 
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        {
 
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            lock (writeMonitor)
 
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            {
 
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                packet.Send(stream);
 
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            }
 
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        }
 
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    }
 
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}