Hi Frank, Thanks for your quick reply. Agree on your point below. Apart from this, on original problem if i capture the ethreal trace on either end, i dont see the payload added by me for TCP. When i try to debug with SNMP4J source, i see the connection is not eshtablished.
Is there anything else missing from code below perticular to TCP? Thanks again, BC On Wed, Mar 4, 2009 at 10:58 PM, Frank Fock <[email protected]> wrote: > Hi, > > You will not get any response on > a trap independently of using > UDP or TCP. Your code itself > will always throw a NullPointerException > here: > > > if (response != null) { > > System.out.println("GOT"+response.getError()); > > System.out.println("GOT"+response.getResponse().getRequestID()); > > response.getResponse() will always return 'null' > when sending a trap/notification. > > > System.out.println("GOT"+response.getError()); > > } > > Best regards, > Frank > > bang bang wrote: > >> I am trying to send out the SNMP V2c trap using SNMP4J. The code which >> is >> trying to do the same is given below. The same code is working fine for >> UDP >> but returns null response for TCP. Can someone please help me to find the >> missing point here? >> >> Thanks in advance. >> CB >> >> package com.test; >> import java.net.InetAddress; >> import java.util.ArrayList; >> import org.snmp4j.CommunityTarget; >> import org.snmp4j.PDU; >> import org.snmp4j.PDUv1; >> import org.snmp4j.Snmp; >> import org.snmp4j.Target; >> import org.snmp4j.TransportMapping; >> import org.snmp4j.event.ResponseEvent; >> import org.snmp4j.mp.SnmpConstants; >> import org.snmp4j.smi.Address; >> import org.snmp4j.smi.Integer32; >> import org.snmp4j.smi.OID; >> import org.snmp4j.smi.OctetString; >> import org.snmp4j.smi.TcpAddress; >> import org.snmp4j.smi.TimeTicks; >> import org.snmp4j.smi.TransportIpAddress; >> import org.snmp4j.smi.UdpAddress; >> import org.snmp4j.smi.VariableBinding; >> import org.snmp4j.transport.DefaultTcpTransportMapping; >> import org.snmp4j.transport.DefaultUdpTransportMapping; >> public class SNMP4J { >> private static boolean isTcp = true; >> public static void main(String[] args) { >> try { >> TransportMapping transport = null; >> if (isTcp) { >> transport = new DefaultTcpTransportMapping(); >> } else { >> transport = new DefaultUdpTransportMapping(); >> } >> Snmp snmp = new Snmp(transport); >> transport.listen(); >> System.out.println("Sending PDU"); >> ResponseEvent response = snmp.send(getPDU(), getTarget()); >> System.out.println("PDU sent"); >> if (response != null) { >> System.out.println("GOT"+response.getError()); >> System.out.println("GOT"+response.getResponse().getRequestID()); >> System.out.println("GOT"+response.getError()); >> } >> } catch (Exception exp) { >> System.out.println("Exception sending message"+exp); >> } catch (Error err) { >> System.out.println("Error sending message"); >> } >> } >> private static PDU getPDU() throws Exception { >> VariableBinding var; >> PDUv1 pdu = new PDUv1(); >> pdu.setType(PDU.TRAP); >> try { >> >> var = new VariableBinding(); >> var.setOid(new OID("1.3.6.1.4.1")); >> var.setVariable(new TimeTicks(12222L)); >> pdu.add(var); >> var = new VariableBinding(); >> var.setOid(new OID("1.3.6.1.4.1")); >> var.setVariable(new Integer32(99)); >> pdu.add(var); >> >> } catch (Exception p) { >> p.printStackTrace(); >> } >> return pdu; >> } >> private static Target getTarget() throws Exception { >> TransportIpAddress targetAddress = null; >> if (isTcp) { >> targetAddress = new TcpAddress(InetAddress.getByName("115.0.0.44"),162); >> } else { >> targetAddress = new UdpAddress(InetAddress.getByName("115.0.0.44"),162); >> } >> CommunityTarget target = new CommunityTarget(); >> target.setCommunity(new OctetString("public")); >> target.setAddress(targetAddress); >> target.setVersion(SnmpConstants.version2c); >> target.setTimeout(500L); >> target.setRetries(3); >> return target; >> } >> >> private void log() { >> >> } >> } >> _______________________________________________ >> SNMP4J mailing list >> [email protected] >> http://lists.agentpp.org/mailman/listinfo/snmp4j >> > > -- > AGENT++ > http://www.agentpp.com > http://www.mibexplorer.com > http://www.mibdesigner.com > > _______________________________________________ SNMP4J mailing list [email protected] http://lists.agentpp.org/mailman/listinfo/snmp4j
