net.java

sifi-0.1.6.tar.gz 出自http://www.ifi.unizh.ch/ikm/SINUS/firewall/ 一个linux的防火墙工具。

/* ----------------------------------------------------------------------
   The SINUS Firewall -- a TCP/IP packet filter for Linux

   Written within the SINUS project at the University of Zurich,
   SWITCH, Telekurs Payserv AG, ETH Zurich.
   originally based on the sf Firewall Software (C) 1996 by Robert
   Muchsel and Roland Schmid.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

   SINUS Firewall resources:
   SINUS Homepage: http://www.ifi.unizh.ch/ikm/SINUS/
   Firewall Homepage: http://www.ifi.unizh.ch/ikm/SINUS/firewall.html
   Frequently asked questions: http://www.ifi.unizh.ch/ikm/SINUS/sf_faq.html
   Mailing list for comments, questions, bug reports: [e-mail]
   ----------------------------------------------------------------------  */



package sfclasses;

import java.awt.*;
import java.io.*;
import java.awt.event.*;
import com.sun.java.swing.*;

/**
 * This class describes a network element, this can contain many real nets
 * and hosts
 * @version 1.0 03 Dec 1996
 * @author Roland E. Schmid
 */

public class Net extends IconObject {

  /** 
   * Initialize object and icon
   */
  public Net() {
    //implicit call to super()
		if (checkConfig(null))
			setOKIcon(null);
		else
			setNOKIcon(null);
  }

  // overriding Object methods

  public String toString() {
    return "Net: "+objectInfo();
  }

  public boolean checkConfig(Frame parent) {

		if (!super.checkConfig())
			return false;

    if (NetAddresses.empty()) {
			if (parent != null)
      	UserDialog.ErrorBox("No addresses assigned to network!");
      return false;
    }
		if (NetAddresses.hasBroadcastAddr() || NetAddresses.hasHostAddr()) {
			if (parent != null)
      	UserDialog.ErrorBox("Host or broadcast address assigned to network!");
			return false;
    }
    return true;
  }
 
  public void setOKIcon(DragDrop dd) {
		if (dd != null)
    	erase(dd.getCanvasGraphics(), dd.offset_x, dd.offset_y);		
    if (bNetOKSource == null)
      bNetOKSource = new networkOKImageSource();
    icon = Toolkit.getDefaultToolkit().createImage(bNetOKSource);
		if (dd != null)
    	draw(dd.getCanvasGraphics(), dd.offset_x, dd.offset_y);
	}
 	
	public void setNOKIcon(DragDrop dd) {
		if (dd != null)
    	erase(dd.getCanvasGraphics(), dd.offset_x, dd.offset_y);		
    if (bNetSource == null)
      bNetSource = new networkImageSource();
    icon = Toolkit.getDefaultToolkit().createImage(bNetSource);
    if (dd != null)
			draw(dd.getCanvasGraphics(), dd.offset_x, dd.offset_y);
	}
  

  /**
   * Show the network properties dialog. The drag and drop panel calls this
   * method when the user double clicks on the network icon in edit mode.
   * @param parent Parent frame (drag and drop panel)
   */
  public void execute(DragDrop dd) {
    NetProperties np;
		Frame parent = Utils.getParentFrame(dd);
		
    if (objectID.length() > 0)
      np = new NetProperties(parent, "Network "+objectID, this);
    else
      np = new NetProperties(parent, "Network properties", this);
    np.setVisible(true);
		if (checkConfig(parent))
			setOKIcon(dd);
		else
			setNOKIcon(dd);
  }

  // persistence methods
  /**
   * Write object data to a persistent output stream
   * @param ps Stream
   * @see PersistentOutputStream
   */
  public void write(PersistentOutputStream ps) {
    super.write(ps);
    ps.writePersistent("NetAddresses=", NetAddresses);
  }

  /**
   * Read object data from a persistent input stream
   * @param ps Stream
   * @see PersistentInputStream
   */
  public void read(PersistentInputStream ps) throws java.io.IOException {
    super.read(ps);
    NetAddresses = (AddrList)ps.readPersistent("NetAddresses=");
  }


  private static java.awt.image.ImageProducer bNetSource = null;
  private static java.awt.image.ImageProducer bNetOKSource = null;

  // network properties
  protected AddrList NetAddresses = new AddrList();

}

// Network properties dialog box
class NetProperties
	extends Dialog
	implements ActionListener, TextListener {

  public NetProperties(Frame parent, String title, Net n) {
    super(parent, title, true);
    net = n;
    GridBagLayout gbl = new GridBagLayout();
    GridBagConstraints gbc = new GridBagConstraints();
    gbc.fill = GridBagConstraints.BOTH;
    gbc.insets = new Insets(5,5,5,5);
    setLayout(gbl);

    // Name panel
    Utils.add_component(this, new JLabel(new ImageIcon(net.icon)), gbl, gbc, 0, 0, 1, 1, 0, 0);
    Utils.add_component(this, new Label("Identifier: "), gbl, gbc, 1, 0, 1, 1, 0, 0);
    IDtext = new TextField(net.objectID);
		IDtext.addTextListener(this);
    Utils.add_component(this, IDtext, gbl, gbc, 2, 0, 3, 1, 100, 0);

    // Address panel
    Panel ap = net.NetAddresses.editPanel();
    Utils.add_component(this, ap, gbl, gbc, 0, 1, 3, 8, 80, 100);

    // Buttons
    OKbutton = new Button("OK");
		OKbutton.addActionListener(this);
    gbc.fill = GridBagConstraints.NONE;
    Utils.add_component(this, OKbutton, gbl, gbc, 0, 9, 5, 1, 0, 0);

    // Window size
    Graphics g = parent.getGraphics();
    FontMetrics fm = g.getFontMetrics();
    setSize(fm.stringWidth("255.255.255.255/255.255.255.255   ") * 2,
           fm.getHeight() * 20 );
    g.dispose();
  }

class NPAdapter extends WindowAdapter {
  public void WindowClosing(WindowEvent we) {
		if (isEnabled())
			dispose();
		return;
  }
} // class NPAdapter


	// Process Buttons
  public void actionPerformed(ActionEvent ae) {
	Object source = ae.getSource();

    if (source==OKbutton) {  
      net.objectID = IDtext.getText().trim();
      dispose();
      return;
    }
	} // actionPerformed
		
	// Process Textfields
	public void textValueChanged(TextEvent te) {
	Object source = te.getSource();
	                                  
    if (source==IDtext) {
      net.objectID = IDtext.getText().trim();
      setTitle("Network "+net.objectID);
      return;
    }
  } // textValueChanged