[SNMP4J] Report doesn't have ContextEngineID/ContextName when Request which has nonexistent ContextEngineID was recieved.

[Kanda Norimichi]

Dear Mr. Fock:

Thank you for your reply and support.

I retried with the corrected module,
I could confirm Trap message was forwarded.

But, snmpTrapCommunity value included in forwarded Trap
was value of coexistenceInfo.getSecurityName().
It would appear that the program code near ProxyForwardImpl.java 330th line
(proxyForwardTranslation()) needs to be corrected.

Sincerely.

Norimichi Kanda


> -----Original Message-----
> From: Frank Fock [mailto:fock at agentpp.com]
> Sent: Thursday, May 24, 2007 3:59 AM
> To: Kanda Norimichi
> Cc: snmp4j at agentpp.org
> Subject: Re: [SNMP4J] Report doesn't have ContextEngineID/ContextName
> when Request which has nonexistent ContextEngineID was recieved.
> 
> 
> OK, the required patch is too complex to
> post it here. You can download the fixed
> nightly build from
> http://www.oosnmp.com/~katz/snapshot/
> The date has to be 20070524 or later.
> 
> Best regards,
> Frank
> 
> Kanda Norimichi wrote:
> > Dear Mr. Fock:
> > 
> > Thank you for your reply.
> > 
> > I added correction program based on your advice and tried,
> > so GetRequest was sent as response.
> > I think perhaps it is because PDU-type isn't set.
> > ----
> >         if (request.getCommandEvent().getMessageProcessingModel() == MPv3.ID) {
> >           ScopedPDU reportPDU = new ScopedPDU();
> >           reportPDU.setContextEngineID(request.getContextEngineID());
> >           reportPDU.setContextName(request.getContext());
> > +         reportPDU.setType(PDU.REPORT);
> >           reportPDU.add(new VariableBinding(SnmpConstants.snmpProxyDrops,
> >                                             cevent.getCurrentValue()));
> >           sendResponse(request.getCommandEvent(), reportPDU);
> >         }
> > ----
> > Report message became to be sent with above correction.
> > 
> > In addition, I couldn't check the operation about one more
> > correction (sendUnknownPDUHandlersReport()).
> > 
> > 
> > And now, I found another problem that I think something is wrong with 
> > operation.
> > Would you check that?
> > 
> > Forwarding SNMPv1 Trap to SNMPv3 Manager,
> > but in ProxyForwarderImpl#matchParameters(), comparative result of secName
> > is NG and forward was failed in.
> > So I debugged program, result of request.getSecurityName() was Community 
> > Name.
> > I retraced more, in CommandProcessor#processPdu(),
> > after succeeding in
> >        cinfo = coexistenceProvider.getCoexistenceInfo(sname);
> > securityName of "event" isn't rewritten.
> > (In the case of securityName which "cinfo" has, 
> >  ProxyForwarderImpl#matchParameters() is succeeded in.)
> > 
> > Where should I correct?
> > 
> > Sincerely.
> > 
> > Norimichi Kanda
> > 
> >> -----Original Message-----
> >> From: Frank Fock [mailto:fock at agentpp.com]
> >> Sent: Tuesday, May 22, 2007 3:21 PM
> >> To: Kanda Norimichi
> >> Cc: snmp4j at agentpp.org
> >> Subject: Re: [SNMP4J] Report doesn't have ContextEngineID/ContextName
> >> when Request which has nonexistent ContextEngineID was recieved.
> >>
> >>
> >> Hello Mr. Kanda,
> >>
> >> Thank you for your bug report. The following
> >> patch should fix it:
> >>
> >> @@ -299,8 +299,12 @@
> >>      CounterEvent counter =
> >>          new CounterEvent(this, SnmpConstants.snmpUnknownPDUHandlers);
> >>      fireIncrementCounter(counter);
> >> -    if (command.getMessageProcessingModel() == MessageProcessingModel.MPv3) {
> >> -      PDU report = new PDU();
> >> +    if ((command.getMessageProcessingModel() == MessageProcessingModel.MPv3) &&
> >> +        (command.getPDU() instanceof ScopedPDU)) {
> >> +      ScopedPDU request = (ScopedPDU) command.getPDU();
> >> +      ScopedPDU report = new ScopedPDU();
> >> +      report.setContextEngineID(request.getContextEngineID());
> >> +      report.setContextName(request.getContextName());
> >>        report.setType(PDU.REPORT);
> >>        report.add(new VariableBinding(counter.getOid(),
> >>                                       counter.getCurrentValue()));
> >> @@ -525,7 +529,9 @@
> >>
> >> SnmpConstants.snmpProxyDrops);
> >>          fireIncrementCounter(cevent);
> >>          if (request.getCommandEvent().getMessageProcessingModel() == MPv3.ID) {
> >> -          PDU reportPDU = new PDU();
> >> +          ScopedPDU reportPDU = new ScopedPDU();
> >> +          reportPDU.setContextEngineID(request.getContextEngineID());
> >> +          reportPDU.setContextName(request.getContext());
> >>            reportPDU.add(new VariableBinding(SnmpConstants.snmpProxyDrops,
> >>                                              cevent.getCurrentValue()));
> >>            sendResponse(request.getCommandEvent(), reportPDU);
> >>
> >> Best regards,
> >> Frank
> >>
> >> Kanda Norimichi wrote:
> >>> Dear Mr. Fock:
> >>>
> >>> I am Kanda and I work at Fujisoft.
> >>>
> >>> I made SNMP Agent (with ProxyForwarder) using SNMP4J-agent.
> >>> In the case of sending GetRequest which has wrong ContextEngineID to that 
> >>> Agent,the Report(Response?) whose PDU part is incorrect format was returned.
> >>>
> >>> So I debugged program, in CommandProcessor.java 528th line,
> >>> the PDU instance created is set at PDU part instead of ScopedPDU which 
> >>> is used in SNMPv3.
> >>> Is it intended operation?
> >>>
> >>> So, in that case, would you tell me if you have some idea about other 
> >>> thinkable probelem in your mind?
> >>>
> >>> Sincerely.
> >>>
> >>> Norimichi Kanda
> >>>
> >>> _______________________________________________
> >>> SNMP4J mailing list
> >>> SNMP4J at agentpp.org
> >>> http://lists.agentpp.org/mailman/listinfo/snmp4j
> >> -- 
> >> AGENT++
> >> http://www.agentpp.com
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> >> http://www.mibdesigner.com
> >>
> 
> -- 
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