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Viewing changes to contrib/NSch/NSch/ChannelDirectTCPIP.cs

  • Committer: Bazaar Package Importer
  • Author(s): Jo Shields
  • Date: 2011-06-27 17:03:13 UTC
  • mto: (1.8.1 upstream)
  • mto: This revision was merged to the branch mainline in revision 54.
  • Revision ID: james.westby@ubuntu.com-20110627170313-6cvz3s19x6e9hqe9
Import upstream version 2.5.92+dfsg

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contrib/NSch/NSch/ChannelDirectTCPIP.cs
 
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/*
 
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Copyright (c) 2006-2010 ymnk, JCraft,Inc. All rights reserved.
 
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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 are met:
 
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  1. Redistributions of source code must retain the above copyright notice,
 
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     this list of conditions and the following disclaimer.
 
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  2. Redistributions in binary form must reproduce the above copyright 
 
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     notice, this list of conditions and the following disclaimer in 
 
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     the documentation and/or other materials provided with the distribution.
 
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  3. The names of the authors may not be used to endorse or promote products
 
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     derived from this software without specific prior written permission.
 
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
 
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
 
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INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
 
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 
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OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
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This code is based on jsch (http://www.jcraft.com/jsch).
 
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All credit should go to the authors of jsch.
 
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*/
 
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using System;
 
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using NSch;
 
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using Sharpen;
 
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namespace NSch
 
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{
 
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        public class ChannelDirectTCPIP : Channel
 
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        {
 
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                private const int LOCAL_WINDOW_SIZE_MAX = unchecked((int)(0x20000));
 
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                private const int LOCAL_MAXIMUM_PACKET_SIZE = unchecked((int)(0x4000));
 
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                internal string host;
 
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                internal int port;
 
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                internal string originator_IP_address = "127.0.0.1";
 
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                internal int originator_port = 0;
 
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                public ChannelDirectTCPIP() : base()
 
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                {
 
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                        SetLocalWindowSizeMax(LOCAL_WINDOW_SIZE_MAX);
 
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                        SetLocalWindowSize(LOCAL_WINDOW_SIZE_MAX);
 
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                        SetLocalPacketSize(LOCAL_MAXIMUM_PACKET_SIZE);
 
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                }
 
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                internal override void Init()
 
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                {
 
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                        try
 
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                        {
 
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                                io = new IO();
 
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                        }
 
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                        catch (Exception e)
 
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                        {
 
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                                System.Console.Error.WriteLine(e);
 
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                        }
 
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                }
 
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                /// <exception cref="NSch.JSchException"></exception>
 
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                public override void Connect()
 
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                {
 
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                        try
 
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                        {
 
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                                Session _session = GetSession();
 
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                                if (!_session.IsConnected())
 
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                                {
 
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                                        throw new JSchException("session is down");
 
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                                }
 
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                                Buffer buf = new Buffer(150);
 
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                                Packet packet = new Packet(buf);
 
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                                // send
 
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                                // byte   SSH_MSG_CHANNEL_OPEN(90)
 
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                                // string channel type         //
 
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                                // uint32 sender channel       // 0
 
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                                // uint32 initial window size  // 0x100000(65536)
 
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                                // uint32 maxmum packet size   // 0x4000(16384)
 
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                                packet.Reset();
 
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                                buf.PutByte(unchecked((byte)90));
 
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                                buf.PutString(Util.Str2byte("direct-tcpip"));
 
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                                buf.PutInt(id);
 
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                                buf.PutInt(lwsize);
 
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                                buf.PutInt(lmpsize);
 
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                                buf.PutString(Util.Str2byte(host));
 
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                                buf.PutInt(port);
 
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                                buf.PutString(Util.Str2byte(originator_IP_address));
 
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                                buf.PutInt(originator_port);
 
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                                _session.Write(packet);
 
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                                int retry = 1000;
 
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                                try
 
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                                {
 
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                                        while (this.GetRecipient() == -1 && _session.IsConnected() && retry > 0 && !eof_remote
 
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                                                )
 
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                                        {
 
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                                                //Thread.sleep(500);
 
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                                                Sharpen.Thread.Sleep(50);
 
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                                                retry--;
 
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                                        }
 
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                                }
 
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                                catch (Exception)
 
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                                {
 
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                                }
 
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                                if (!_session.IsConnected())
 
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                                {
 
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                                        throw new JSchException("session is down");
 
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                                }
 
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                                if (retry == 0 || this.eof_remote)
 
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                                {
 
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                                        throw new JSchException("channel is not opened.");
 
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                                }
 
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                                connected = true;
 
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                                if (io.@in != null)
 
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                                {
 
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                                        thread = new Sharpen.Thread(this);
 
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                                        thread.SetName("DirectTCPIP thread " + _session.GetHost());
 
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                                        if (_session.daemon_thread)
 
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                                        {
 
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                                                thread.SetDaemon(_session.daemon_thread);
 
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                                        }
 
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                                        thread.Start();
 
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                                }
 
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                        }
 
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                        catch (Exception e)
 
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                        {
 
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                                io.Close();
 
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                                io = null;
 
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                                Channel.Del(this);
 
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                                if (e is JSchException)
 
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                                {
 
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                                        throw (JSchException)e;
 
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                                }
 
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                        }
 
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                }
 
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                public override void Run()
 
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                {
 
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                        Buffer buf = new Buffer(rmpsize);
 
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                        Packet packet = new Packet(buf);
 
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                        int i = 0;
 
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                        try
 
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                        {
 
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                                Session _session = GetSession();
 
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                                while (IsConnected() && thread != null && io != null && io.@in != null)
 
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                                {
 
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                                        i = io.@in.Read(buf.buffer, 14, buf.buffer.Length - 14 - 32 - 20);
 
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                                        // padding and mac
 
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                                        if (i <= 0)
 
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                                        {
 
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                                                Eof();
 
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                                                break;
 
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                                        }
 
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                                        if (close)
 
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                                        {
 
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                                                break;
 
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                                        }
 
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                                        packet.Reset();
 
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                                        buf.PutByte(unchecked((byte)Session.SSH_MSG_CHANNEL_DATA));
 
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                                        buf.PutInt(recipient);
 
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                                        buf.PutInt(i);
 
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                                        buf.Skip(i);
 
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                                        _session.Write(packet, this, i);
 
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                                }
 
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                        }
 
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                        catch (Exception)
 
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                        {
 
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                        }
 
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                        Disconnect();
 
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                }
 
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                //System.err.println("connect end");
 
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                public override void SetInputStream(InputStream @in)
 
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                {
 
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                        io.SetInputStream(@in);
 
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                }
 
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                public override void SetOutputStream(OutputStream @out)
 
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                {
 
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                        io.SetOutputStream(@out);
 
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                }
 
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                public virtual void SetHost(string host)
 
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                {
 
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                        this.host = host;
 
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                }
 
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                public virtual void SetPort(int port)
 
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                {
 
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                        this.port = port;
 
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                }
 
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                public virtual void SetOrgIPAddress(string foo)
 
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                {
 
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                        this.originator_IP_address = foo;
 
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                }
 
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                public virtual void SetOrgPort(int foo)
 
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                {
 
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                        this.originator_port = foo;
 
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                }
 
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        }
 
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}