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