[SNMP4J] problem to receive traps

[Frank Fock]

Hello Stefan,

Stefan M wrote:
>> Hello Stefan,
>>
>> You did not specify the interface and port on which you want
>> to receive SNMP messsages. SNMP4J therefore chooses an arbitrary
>> one. Have you sent the traps to that port?
>>
>> If you have used
>>
>> this.snmp = new Snmp(new DefaultUdpTransportMapping());
>>
>> by accident, then please specify the port like this
> 
> Hello Frank,
> 
> I am using this snmp object to send snmp messages as well. Hope this is 
> no problem? If I specifiy an Address as you do, I get a null pointer 
> exception when trying to send a message...but maybe this is due to 
> privileges on my machine... Will try it and send my results. Thanks for 
> this great package and support!
> 
> Stefan

If you also want to send SNMP messages as well, then
I would recommend that you use your existing code and
add the marked line:

...
this.snmp = new Snmp(new DefaultUdpTransportMapping());
CommandResponder trapPrinter =
   new CommandResponder() {
     public synchronized void processPdu(CommandResponderEvent e) {
         LOGGER.debug("e = "+e);
         PDU command = e.getPDU();
         if (command != null) {
             LOGGER.debug("TRAP>> "+command);
         }
     }
};
// -->>>> add this line to register your trap receiver:
this.snmp.addNotificationListener(
	new UdpAddress("0.0.0.0/162", trapPrinter));
// -->>>> replaced by above line:
// snmp.addCommandResponder(trapPrinter);
this.snmp.listen();
...

Best regards,
Frank

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