tunnel java avec interface graphique

	L'écran est divisé en deux parties, à gauche les messages envoyés par le client, à droite par le serveur vous pouvez ainsi voir tout ce qui passe et mieux comprendre comment ça marche.
	Pour configurer, c'est très simple il suffit de choisir le port d'écoute du tunnel, et de donner l'adresse et port du serveur.

import java.io.*;
import java.lang.*;
import java.util.*;
import java.net.*;
import javax.swing.*;
import javax.swing.border.*;
import java.awt.event.*;
import java.awt.*;

public class Tunnel extends JFrame
{

  public class ProxyDialog extends JDialog
  {
    JTextField hostTF, portTF;

    public ProxyDialog(Frame parent, boolean modal)
    {
      super(parent, modal);

      JPanel panel1, panel3;
      JButton okButton, cancelButton;

      Container contentPane = this.getContentPane();

      panel1 = new JPanel();
      panel1.setLayout(new FlowLayout(FlowLayout.CENTER));
      contentPane.add(panel1, BorderLayout.SOUTH);
      okButton = new JButton("OK");
      panel1.add(okButton);
      cancelButton = new JButton("Cancel");
      panel1.add(cancelButton);

      panel3 = new JPanel();
      panel3.setLayout(new FlowLayout(FlowLayout.CENTER));
      contentPane.add(panel3, BorderLayout.CENTER);
      hostTF = new JTextField(proxy, 20);
      portTF = new JTextField("" + proxyport, 5);
      panel3.add(hostTF);
      panel3.add(portTF);

      setTitle("Target info");
      pack();


      cancelButton.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent event)
        {
          dispose();
          setVisible(false);
        }
      });

      okButton.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent event)
        {
          proxy = hostTF.getText();
          proxyport = Integer.parseInt(portTF.getText());
          dispose();
          setVisible(false);
        }
      });

    }
  }


  public class PortDialog extends JDialog
  {
    JTextField portTF;

    public PortDialog(Frame parent, boolean modal)
    {
      super(parent, modal);

      JPanel panel1, panel3;
      JButton okButton, cancelButton;

      Container contentPane = this.getContentPane();

      panel1 = new JPanel();
      panel1.setLayout(new FlowLayout(FlowLayout.CENTER));
      contentPane.add(panel1, BorderLayout.SOUTH);
      okButton = new JButton("OK");
      panel1.add(okButton);
      cancelButton = new JButton("Cancel");
      panel1.add(cancelButton);

      panel3 = new JPanel();
      panel3.setLayout(new FlowLayout(FlowLayout.CENTER));
      contentPane.add(panel3, BorderLayout.CENTER);
      panel3.add(new JLabel("Proxy port"));
      portTF = new JTextField("" + port, 5);
      panel3.add(portTF);

      setTitle("Port info");
      pack();


      cancelButton.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent event)
        {
          dispose();
          setVisible(false);
        }
      });

      okButton.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent event)
        {
          port = Integer.parseInt(portTF.getText());
          try {
            s.close();
            s = new ServerSocket(port);
          } catch (Exception e) {};
          dispose();
          setVisible(false);
        }
      });

    }
  }

  class OneServeur extends Thread {
    private JTextArea TA;
    private BufferedReader from;
    private PrintWriter to;
    private Socket socketFrom, socketTo;
    private OneServeur cli;

    public OneServeur( Socket fromW,
                       Socket toW,
                       JTextArea display,
                       OneServeur cliW) throws IOException {
      TA = display ;
      socketFrom = fromW;
      socketTo = toW ;
      from = new BufferedReader(
                 new InputStreamReader ( socketFrom.getInputStream())) ;
      to = new PrintWriter(
               new BufferedWriter (
                   new OutputStreamWriter (
                       socketTo.getOutputStream())),true);
      cli = cliW;
      start();
    }

    public void run() {
      String str = "";
      try {
        TA.append("\r\n----------"+ new Date() +"----------------\r\n");
        while ( true ) {
           str = from.readLine();
           if ( str == null ) break;
           TA.append(str+"\r\n");
           to.print(str+"\r\n");
           to.flush();
        }
      } catch ( Exception e) {
         // e.printStackTrace();
      }
      TA.append("\r\n---------- End ----------------\r\n");
      close();
      if ( cli != null ) cli.close();
    }

    public void close() {
       try {
          socketFrom.close();
          from.close();
       } catch ( Exception e) {}
    }

  }


  class TheServeur extends Thread {
    private Socket socket, socketToWeb;

    public TheServeur() throws IOException {
      start();
    }

    public void run() {
      try {
        while ( true ) {
          socket = s.accept();
          socketToWeb = new Socket(InetAddress.getByName(proxy),proxyport);

          OneServeur cli = new OneServeur(socket, socketToWeb , TAfromBw, null);
          new OneServeur(socketToWeb, socket , TAfromWeb, cli);
        }
      } catch ( Exception e) {
        e.printStackTrace();
        return ;
      }
    }
  }


  public int port = 12345;
  public int proxyport = 80;
  public String  proxy = "target";
  private ServerSocket s;
  private JTextArea TAfromBw = new JTextArea(50,30);
  private JTextArea TAfromWeb = new JTextArea(50,30);

  public Tunnel() throws IOException {
    JMenuBar menuBar = new JMenuBar();
    JButton closeButton = new JButton("Close");
    JScrollPane webPane, bwPane;

    Container contentPane = this.getContentPane();

    JPanel Core = new JPanel();
    Core.setLayout(new BorderLayout());

    setJMenuBar(menuBar);

    JMenu fMenu = new JMenu("File");
    menuBar.add(fMenu);

    JMenuItem proxyItem = new JMenuItem("Set Target", 2);
    fMenu.add(proxyItem);
    JMenuItem portItem = new JMenuItem("Set Port", 2);
    fMenu.add(portItem);
    JMenuItem clearItem = new JMenuItem("Clear", 2);
    fMenu.add(clearItem);
    fMenu.addSeparator();
    JMenuItem exitItem = new JMenuItem("Exit", 2);
    fMenu.add(exitItem);

    webPane = new JScrollPane(TAfromWeb,
                               JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
                               JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);

    bwPane = new JScrollPane(TAfromBw,
                               JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
                               JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);

    Core.add(bwPane, BorderLayout.WEST);
    Core.add(webPane, BorderLayout.EAST);


    contentPane.add(Core);


    // add listeners for the window and the various buttons
    this.addWindowListener( new WindowAdapter(){
         public void windowClosing(WindowEvent e){
              setVisible(false);
              dispose();
              System.exit(0);
    }});

    exitItem.addActionListener( new ActionListener(){
         public void actionPerformed(ActionEvent e){
              System.exit(0);
    }});

    proxyItem.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e){
            changeProxy();
    }});

    portItem.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e){
            changePort();
    }});

    clearItem.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e){
            clearPage();
    }});

    pack();

    s = new ServerSocket(port);
    new TheServeur();

  }

  protected void changeProxy()
  {
    new ProxyDialog(this, true).show();
  }

  protected void clearPage()
  {
      TAfromBw.setText("");
      TAfromWeb.setText("");
  }

  protected void changePort()
  {
    new PortDialog(this, true).show();
  }


  public static void main ( String args[] ) {
    try {
      (new Tunnel()).setVisible(true);
    } catch ( Exception e ) {}

  }