Re: [stunnel-users] A series of minor patches from Debian

15 Sep 2007

      Hi Luis,

{
I'm kind of new to this app. If you'll give me a thorough description
of the problem, I'll have a go at it. A link to some previous bug
report is fine.
}

It is not a bug; it is (at present and for some unknow reason) an
architectural limitation of STUNNEL. I simply wish to specify the MSG_OOB
flag in my client's C Socket SEND call, or use the (below) sendUrgentData()
Java method, and have STUNNEL just faithfully replay it to the destination
TCP/IP port. Am I asking too much?

Cheers Richard Maher

import java.io.BufferedOutputStream;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.net.SocketTimeoutException;
import java.lang.System;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;

public class Tier3Socket
 {
 public  static final
         String                T3ID="T3$";
 public  static final
         int                   USERSIZ=40;
 public  static final
         int                   T3IDBUFSIZ=48;
 public  static final
         int                   CREDBUFSIZ=80;
 public  static final
         int                   CONTIMOUT=3000;

 public  byte []               t3IdBuf;
 public  byte []               readBuf;
 public  byte []               writeBuf;

 private String                host;
 private int                   port;
 private int                   maxBufSiz;
 private int                   bytesIn;
 private String                hostCharSet;
 private Socket                t3Sock;
 private SSLSocketFactory      sockFactory;
 private BufferedInputStream   in;
 private BufferedOutputStream  out;
 private byte []               outUser;
 private byte []               outPwd;
 private byte []               credBuf;
 private String                inMsg;
 private String                stringOut;
 private boolean               sslReqd;

 Tier3Socket (String host, int port, int maxBufSiz, String hostCharSet,
boolean sslReqd)
 {
  this.host        = host;
  this.port        = port;
  this.maxBufSiz   = maxBufSiz;
  this.hostCharSet = hostCharSet;
  this.bytesIn     = 0;
  this.sslReqd     = sslReqd;

  t3IdBuf  = new byte[T3IDBUFSIZ];
  readBuf  = new byte[maxBufSiz];

  if (sslReqd)
     sockFactory = (SSLSocketFactory)SSLSocketFactory.getDefault();
 }

 public void open() throws UnknownHostException, IOException
 {
  if (sslReqd)
     t3Sock = (SSLSocket)sockFactory.createSocket();
  else
     t3Sock = new Socket();

  t3Sock.setKeepAlive(true);
  t3Sock.setReuseAddress(true);
  t3Sock.setTcpNoDelay(true);
  t3Sock.connect(new InetSocketAddress(host,port), CONTIMOUT);

  in  = new BufferedInputStream  (t3Sock.getInputStream() ,maxBufSiz);
  out = new BufferedOutputStream (t3Sock.getOutputStream(),maxBufSiz);

  if (sslReqd)
     {
     ((SSLSocket)t3Sock).setUseClientMode(true);

     try {((SSLSocket)t3Sock).startHandshake();}
         catch (IOException e)
               {
                System.out.println("Failed SSL Handshake");
                throw new IOException("Can't SSL on Socket");
               }
     }
 }

 public void handShake(String username, String password) throws IOException
 {
  credBuf = new byte[CREDBUFSIZ];

  outUser = username.getBytes(hostCharSet);
  System.arraycopy(outUser, 0, credBuf, 0, outUser.length);

  outPwd  = password.getBytes(hostCharSet);
  System.arraycopy(outPwd, 0, credBuf, USERSIZ, outPwd.length);

  out.write(credBuf, 0, CREDBUFSIZ);
  out.flush();

  if (in.read(t3IdBuf) < t3IdBuf.length)
  {
      System.out.println("Read < " + Integer.toString(t3IdBuf.length) + "
bytes");
      throw new IOException();
  }

  inMsg = new String(t3IdBuf, 0, 3, hostCharSet);

  if (!inMsg.equals(T3ID))
  {
      throw new IOException();
  }
 }

 public void sendUrgentData (int oob) throws IOException
 {
  t3Sock.sendUrgentData(oob);
 }

 public void setTimeout(int msecs) throws UnknownHostException, IOException
 {
  t3Sock.setSoTimeout(msecs);
 }

 public void close () throws IOException
 {
  if (t3Sock != null && !t3Sock.isClosed())
  {
      try {t3Sock.close();}
      catch (Exception e)
            {e.printStackTrace();}
  }
 }

 public void buffMessage (String message) throws IOException
 {
  byte [] msg = message.getBytes(hostCharSet);

  out.write(msg);
 }

 public void sendMessage (String message) throws IOException
 {
  byte [] msg = message.getBytes(hostCharSet);

  out.write(msg);
  flush();
 }

 public void flush () throws IOException
 {
  out.flush();
 }

 public int readMessage () throws IOException
 {
  return readMessage(readBuf.length);
 }

 public int readMessage (int bytes) throws IOException
 {
  try
      {
      bytesIn = in.read(readBuf, 0, bytes);
      }
  catch (SocketTimeoutException e)
      {
      return 0;
      }

  return bytesIn;
 }

 public String getString () throws ArrayIndexOutOfBoundsException
 {
  return getString(0, bytesIn);
 }

 public String getString (int offset, int length) throws
ArrayIndexOutOfBoundsException
 {
  if ((offset + length) > bytesIn)
  {
      throw new ArrayIndexOutOfBoundsException();
  }
  try
      {
      stringOut = new String(readBuf, offset, length, hostCharSet);
      }
  catch (Exception e)
      {
      return null;
      }

  return stringOut;
 }

}

----- Original Message ----- 
From: "Luis Rodrigo Gallardo Cruz" <rodrigo@nul-unu.com>
To: <stunnel-users@mirt.net>
Sent: Saturday, September 15, 2007 9:20 AM
Subject: Re: [stunnel-users] A series of minor patches from Debian
...
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Re: [stunnel-users] A series of minor patches from Debian

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