snmpinquisitor.java

snmp inquistor Pour la communication avec les agents SNMP on utilise un package Java open source

        c.gridwidth = 1;
        c.weightx = 0;
        c.weighty = 0;
 
 

        this.getContentPane().setLayout(theLayout);
 

        c.gridx = 1;
        c.gridy = 1;
        theLayout.setConstraints(hostPanel, c);
        this.getContentPane().add(hostPanel);

        c.gridx = 1;
        c.gridy = 2;
        theLayout.setConstraints(oidPanel, c);
        this.getContentPane().add(oidPanel);

        c.gridx = 1;
        c.gridy = 3;
        theLayout.setConstraints(buttonPanel, c);
        this.getContentPane().add(buttonPanel);

        c.fill = GridBagConstraints.BOTH;
        c.gridx = 1;
        c.gridy = 4;
        c.weightx = .5;
        c.weighty = .5;
        theLayout.setConstraints(messagesPanel, c);
        this.getContentPane().add(messagesPanel);

        c.fill = GridBagConstraints.NONE;
        c.gridx = 1;
        c.gridy = 5;
        c.weightx = 0;
        c.weighty = 0;
        theLayout.setConstraints(authorLabel, c);
        this.getContentPane().add(authorLabel);
 

    }
 
 
 
 

    public void actionPerformed(ActionEvent theEvent)
    // respond to button pushes, menu selections
    {
        String command = theEvent.getActionCommand();
 

        if (command == "quit")
        {
            System.exit(0);
        }
 
 

        if (command == "clear messages")
        {
            messagesArea.setText("");
        }
 
 

        if (command == "get data")
        {
            try
            {

                String community = communityField.getText();
                int version = 0;    // SNMPv1
                InetAddress hostAddress = InetAddress.getByName(hostIDField.getText());
                SNMPv1CommunicationInterface comInterface = new SNMPv1CommunicationInterface(version, hostAddress, community);

                StringTokenizer st = new StringTokenizer(OIDField.getText(), " ,;");

                while (st.hasMoreTokens())
                {
                    String itemID = st.nextToken();
                    SNMPVarBindList newVars = comInterface.getMIBEntry(itemID);
                    SNMPSequence pair = (SNMPSequence)(newVars.getSNMPObjectAt(0));
                    SNMPObjectIdentifier snmpOID = (SNMPObjectIdentifier)pair.getSNMPObjectAt(0);
                    SNMPObject snmpValue = pair.getSNMPObjectAt(1);
                    String typeString = snmpValue.getClass().getName();

                    if (typeString.equals("snmp.SNMPOctetString"))
                    {
                        String snmpString = snmpValue.toString();

                        // truncate at first null character
                        int nullLocation = snmpString.indexOf('\0');
                        if (nullLocation >= 0)
                            snmpString = snmpString.substring(0,nullLocation);

                        messagesArea.append("OID: " + snmpOID + "  type: " + typeString + "  value: " + snmpString);
                        messagesArea.append("  (hex: " + ((SNMPOctetString)snmpValue).toHexString() + ")\n");
                    }
                    else
                    {
                        messagesArea.append("OID: " + snmpOID + "  type: " + typeString + "  value: " + snmpValue);
                        messagesArea.append("\n");
                    }
                }
            }
            catch(InterruptedIOException e)
            {
                messagesArea.append("Interrupted during retrieval:  " + e + "\n");
            }
            catch(Exception e)
            {
                messagesArea.append("Exception during retrieval:  " + e + "\n");
            }

        }
 
 
 

        if (command == "set value")
        {
            try
            {

                String community = communityField.getText();
                int version = 0;    // SNMPv1
                InetAddress hostAddress = InetAddress.getByName(hostIDField.getText());
                SNMPv1CommunicationInterface comInterface = new SNMPv1CommunicationInterface(version, hostAddress, community);
 

                String itemID = OIDField.getText();
                String valueString = valueField.getText();
                String valueTypeString = (String)valueTypeBox.getSelectedItem();
                valueTypeString = "snmp." + valueTypeString;

                SNMPObject itemValue;
                Class valueClass = Class.forName(valueTypeString);
                itemValue = (SNMPObject)valueClass.newInstance();
                itemValue.setValue(valueString);

                SNMPVarBindList newVars = comInterface.setMIBEntry(itemID, itemValue);

                SNMPSequence pair = (SNMPSequence)(newVars.getSNMPObjectAt(0));

                SNMPObjectIdentifier snmpOID = (SNMPObjectIdentifier)pair.getSNMPObjectAt(0);

                SNMPObject snmpValue = pair.getSNMPObjectAt(1);

                String typeString = snmpValue.getClass().getName();

                messagesArea.append("OID: " + snmpOID + "  type: " + typeString + "  value: " + snmpValue);

                if (typeString.equals("snmp.SNMPOctetString"))
                    messagesArea.append("  (hex: " + ((SNMPOctetString)snmpValue).toHexString() + ")\n");
                else
                    messagesArea.append("\n");

            }
            catch(InterruptedIOException e)
            {
                messagesArea.append("Interrupted during retrieval:  " + e + "\n");
            }
            catch(Exception e)
            {
                messagesArea.append("Exception during retrieval:  " + e + "\n");
            }

        }
 
 
 

        if (command == "get treewalk data")
        {
            if (!treewalkThread.isAlive())
            {
                treewalkThread = new Thread(this);
                treewalkThread.start();
                getTreewalkDataButton.setText("Stop OID retrieval");
            }
            else
            {
                treewalkThread.interrupt();
            }
        }
 
 
 

    }
 
 
 
 
 

    public void run()
    {

        try
        {

            String community = communityField.getText();
            int version = 0;    // SNMPv1
            InetAddress hostAddress = InetAddress.getByName(hostIDField.getText());
            SNMPv1CommunicationInterface comInterface = new SNMPv1CommunicationInterface(version, hostAddress, community);
 

            //String itemID = "1.3.6.1.2.1.1.1.0";    // start with device name
            String itemID = "";
            String retrievedID = "1.3.6.1.2.1";        // start point

 
            while (!Thread.interrupted() && !retrievedID.equals(itemID))
            {
                itemID = retrievedID;

                SNMPVarBindList newVars = comInterface.getNextMIBEntry(itemID);

                SNMPSequence pair = (SNMPSequence)(newVars.getSNMPObjectAt(0));
                SNMPObjectIdentifier snmpOID = (SNMPObjectIdentifier)pair.getSNMPObjectAt(0);
                SNMPObject snmpValue = pair.getSNMPObjectAt(1);
                retrievedID = snmpOID.toString();
                String typeString = snmpValue.getClass().getName();

                if (typeString.equals("snmp.SNMPOctetString"))
                {
                    String snmpString = snmpValue.toString();

                    // truncate at first null character
                    int nullLocation = snmpString.indexOf('\0');
                    if (nullLocation >= 0)
                        snmpString = snmpString.substring(0,nullLocation);

                    messagesArea.append("OID: " + snmpOID + "  type: " + typeString + "  value: " + snmpString);
                    messagesArea.append("  (hex: " + ((SNMPOctetString)snmpValue).toHexString() + ")\n");
                }
                else
                {
                    messagesArea.append("OID: " + snmpOID + "  type: " + typeString + "  value: " + snmpValue);
                    messagesArea.append("\n");
                }
            }
 

        }
        catch(InterruptedIOException e)
        {
            messagesArea.append("Interrupted during retrieval:  " + e + "\n");
        }
        catch(Exception e)
        {
            messagesArea.append("Exception during retrieval:  " + e + "\n");
        }

        getTreewalkDataButton.setText("Get all OID values");

    }
 
 
 
 
 
 
 

    private String hexByte(byte b)
    {
        int pos = b;
        if (pos < 0)
            pos += 256;
        String returnString = new String();
        returnString += Integer.toHexString(pos/16);
        returnString += Integer.toHexString(pos%16);
        return returnString;
    }
 
 
 
 
 
 
 
 

    public static void main(String args[])
    {
        try
        {
            SNMPInquisitor theApp = new SNMPInquisitor();
            theApp.pack();
            theApp.setSize(600,500);
            theApp.show();
        }
        catch (Exception e)
        {}
    }
 

}