displaystring.java

无线网络管理

// NAME
//      $RCSfile: DisplayString.java,v $
// DESCRIPTION
//      [given below in javadoc format]
// DELTA
//      $Revision: 1.3 $
// CREATED
//      $Date: 2006/01/30 11:37:15 $
// COPYRIGHT
//      Westhawk Ltd
// TO DO
//

/*
 * Copyright (C) 1996 - 2006 by Westhawk Ltd
 *
 * Permission to use, copy, modify, and distribute this software
 * for any purpose and without fee is hereby granted, provided
 * that the above copyright notices appear in all copies and that
 * both the copyright notice and this permission notice appear in
 * supporting documentation.
 * This software is provided "as is" without express or implied
 * warranty.
 * author <a href="mailto:[e-mail]">Tim Panton</a>
 */

package uk.co.westhawk.examplev2c;

import uk.co.westhawk.snmp.stack.*;
import uk.co.westhawk.snmp.pdu.*;
import java.awt.*; 
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
import java.net.*;

/**
 * <p>
 * The DisplayString application tests the display (print)
 * of DisplayString. It will display the parameters, as configured in the 
 * properties file. 
 * It will show the (unicode) value as specified in the properties file
 * in the UI.
 * The UI will enable you to do a set with this value. The returned
 * value should be exactly the same as original unicode one.
 * </p>
 *
 * <p>
 * The name of the properties file can be passed as first argument to
 * this application. If there is no such argument, it will look for
 * <code>DisplayString.properties</code>. If this file does not exist, the
 * application will use default parameters.
 * </p>
 *
 * <p>
 * The user can set the required OID and perform a Get or GetNext
 * request. 
 * </p>
 *
 * <p>
 * The user can also set a MIB variable by performing a Set request.
 * By default the value is set as a String type (using AsnOctets),
 * unless the value is a number (AsnInteger will then be used). 
 * </p>
 *
 * @see uk.co.westhawk.snmp.stack.GetPdu
 * @see uk.co.westhawk.snmp.stack.SetPdu
 *
 * @author <a href="mailto:[e-mail]">Birgit Arkesteijn</a>
 * @version $Revision: 1.3 $ $Date: 2006/01/30 11:37:15 $
 */
public class DisplayString extends JComponent 
      implements Observer, ActionListener, AsnOctetsPrintableFace
{
    private static final String     version_id =
        "@(#)$Id: DisplayString.java,v 1.3 2006/01/30 11:37:15 birgit Exp $ Copyright Westhawk Ltd";

    /**
     * sysLocation is used as default oid
     */
    public final static String sysLocation = "1.3.6.1.2.1.1.6.0";

    private String host;
    private int port;
    private String community;
    private String oid;
    private String value;
    private String socketType;
    private String bindAddr;
    private int version = SnmpConstants.SNMP_VERSION_2c;

    private SnmpContextFace context;
    private JTextField   thost, toid, tcom, tport, tvalue;
    private JButton      getButton, setButton, getNextButton;
    private JLabel       lmessage;
    private JComboBox    snmpVersion;

    private Pdu         pdu;
    private boolean     pduInFlight;
    private Util        util;


/**
 * Constructor.
 *
 * @param propertiesFilename The name of the properties file. Can be
 * null.
 */
public DisplayString(String propertiesFilename)
{
    AsnObject.setDebug(6);
    util = new Util(propertiesFilename, this.getClass().getName());
}



public void init () 
{
    host = util.getHost();
    port = util.getPort(SnmpContextBasisFace.DEFAULT_PORT);
    bindAddr = util.getBindAddress();
    socketType = util.getSocketType();
    oid = util.getOid(sysLocation);
    community = util.getCommunity();
    value = util.getProperty("value");

    pduInFlight = false;
    makeLayout(host, oid, port, community, value);
    // sendGetRequest(host, port, community, oid, version);
}


public void actionPerformed(ActionEvent evt)
{
    Object src = evt.getSource();
    host = thost.getText();
    port = Integer.valueOf(tport.getText()).intValue();
    community = tcom.getText();
    oid = toid.getText();

    String item = (String) snmpVersion.getSelectedItem();
    if (item.equals("v2c"))
    {
        version = SnmpConstants.SNMP_VERSION_2c;
    }
    else
    {
        version = SnmpConstants.SNMP_VERSION_1;
    }

    try
    {
        context = createContext(version, host, port, community, bindAddr, socketType);

        if (src == getButton)
        {
            pdu = new GetPdu(context);
            pdu.addOid(oid);
        }
        else if (src == getNextButton)
        {
            pdu = new GetNextPdu(context);
            pdu.addOid(oid);
        }
        else if (src == setButton)
        {
            SetPdu setPdu = new SetPdu(context);
            String value = tvalue.getText();
            AsnObject obj;
            if (Util.isNumber(value))
            {
                obj = new AsnInteger(Util.getNumber(value));
            }
            else
            {
                byte [] utf8bytes = value.getBytes("UTF-8");
                AsnOctets utfoctet = new AsnOctets(utf8bytes, SnmpConstants.ASN_OCTET_STR);
                obj = utfoctet;
                System.out.println("actionPerformed(): value " + value 
                      + ", " + utfoctet.toHex());
            }
            setPdu.addOid(oid, obj);

            pdu = setPdu;
        }
        sendRequest(pdu);
    }
    catch (Exception exc)
    {
        exc.printStackTrace();
        setErrorMessage("Exception: " + exc.getMessage());
    }
}

private void sendGetRequest(String host, int port, String comm, 
  String oid, int version)
{
    try
    {
        context = createContext(version, host, port, comm, bindAddr, socketType);

        pdu = new GetPdu(context);
        pdu.addOid(oid);
        sendRequest(pdu);
    }
    catch (java.io.IOException exc)
    {
        exc.printStackTrace();
        setErrorMessage("IOException: " + exc.getMessage());
    }
}

private SnmpContextFace createContext(int version, String host, int port, 
    String comm, String bindAddr, String socketType)
throws java.io.IOException
{
    SnmpContextFace c;
    if (version == SnmpConstants.SNMP_VERSION_2c)
    {
        c = new SnmpContextv2cPool(host, port, comm, bindAddr, socketType);
    }
    else
    {
        c = new SnmpContextPool(host, port, comm, bindAddr, socketType);
    }
    //((SnmpContextPool)context).dumpContexts("Dump 1:");
    return c;
}

private void sendRequest(Pdu pdu)
{
    boolean hadError = false;

    setButton.setEnabled(false);
    getButton.setEnabled(false);
    getNextButton.setEnabled(false);
    try
    {
        if (!pduInFlight)
        {
            pduInFlight = true;
            setMessage("Sending request ..: ");

            pdu.addObserver(this);
            pdu.send();
        }
        else
        {
            setErrorMessage("Pdu still in flight");
        }
    }
    catch (PduException exc)
    {
        exc.printStackTrace();
        setErrorMessage("PduException: " + exc.getMessage());
        hadError = true;
    }
    catch (java.io.IOException exc)
    {
        exc.printStackTrace();
        setErrorMessage("IOException: " + exc.getMessage());
        hadError = true;
    }

    if (hadError == true)
    {
        pduInFlight = false;
        setButton.setEnabled(true);
        getButton.setEnabled(true);
        getNextButton.setEnabled(true);
    }
}

public boolean isPrintable(byte[] value)
{
    return true;