[SNMP4J] Snmp INFORM response problem

[Tayyab Akram]

Hi all,

I need some help,
I have implemented trap receiver using Snmp4j and now I am sending SnmpV3
INFORM using net-snmp tool "*snmpinform*"

I have implemented the *processPdu()* function to response the INFORM
messages as told by Jeff.
Still *snmpinform* fails due to bad response, Below is the output of the
snmpinform command,

[root at localhost]# *snmpinform -v 3 -u wes localhost ''
SNMPv2-MIB::sysLocation.0*
*snmpinform: Timeout (plaintext scopedPDU header type A6: s/b 30)*

Can anybody tell me what's wrong???

I used WireShark paket sniffer to see the packets which shows,
*snmpinform* sent 5 INFORMS (retries).... Against every INFORM my Trap
Receiver sent response but Packet Sniffer shows that the response packets
have *WRONG UDP CHECKSUM*.

Can anybody give some hint about what could be wrong???
Why my code is sending Bad response?? Below is the implementation of my *
processPdu()* function,

 public void processPdu(CommandResponderEvent crEvent) {
        crEvent.setProcessed(true);

        PDU trapPDU = new PDU(crEvent.getPDU());
        if(trapPDU != null) {
            if(trapPDU.getType() == PDU.INFORM) {
                *PDU responsePDU = new PDU(trapPDU);*
                responsePDU.setErrorIndex(0);
                responsePDU.setErrorStatus(0);
                responsePDU.setType(PDU.RESPONSE);
                StatusInformation statusInfo = new StatusInformation();
                StateReference stateRef = crEvent.getStateReference();
                try {
                    *crEvent.getMessageDispatcher().returnResponsePdu(
                            crEvent.getMessageProcessingModel(),
                            crEvent.getSecurityModel(),
                            crEvent.getSecurityName(),
                            crEvent.getSecurityLevel(),
                            trapPDU,
                            crEvent.getMaxSizeResponsePDU(),
                            stateRef,
                            statusInfo);*

                } catch (MessageException msgEx) {
                    Logger.error(msgEx);
                }
            }
        }


Thanks in advance,
--Tayyab