[SNMP4J] Problems with Request ID

[Frank Fock]

Hi Angel,

Please try to replace row 383-391 of MessageDispatcherImpl by

      // if request ID is == 0 then create one here, otherwise use the 
request
      // ID because it may be a resent request.
      PduHandle pduHandle;
      if ((pdu.getRequestID().getValue() == 0) &&
          (pdu.getType() != PDU.RESPONSE)) {
        pduHandle = createPduHandle();
      }
      else {
        pduHandle = new PduHandle(pdu.getRequestID().getValue());
      }

This will fix the problem, I suppose.

Best regards,
Frank

Angel Angelov wrote:

>Hi Frank,
>I upgraded snmp4j to v1.6a, but I still get problems with request IDs > 2^31.
>
>Here is a packet I receive:
>2005-11-10 13:25:01,215 [DefaultUDPTransportMapping_0.0.0.0/1162] DEBUG org.snmp4j.transport.DefaultUdpTransportMapping - Received message from /172.25.2.20/40975 with length 63: 30:3d:02:01:00:04:06:70:75:62:6c:69:63:a0:30:02:04:8d:ef:89:54:02:01:00:02:01:00:30:22:30:0f:06:0b:2b:06:01:04:01:86:8d:1f:64:01:01:05:00:30:0f:06:0b:2b:06:01:04:01:86:8d:1f:64:01:02:05:00
>
>The request ID is set to -1913681580 in to the PDU object
>When I snoop the UDP packets on my network interface I see that the request ID have value 0x8DEF8954
>
>I crate response PDU using the same request ID -1913681580.
>This is the response packet:
>2005-11-10 13:25:01,218 [DefaultUDPTransportMapping_0.0.0.0/1162] DEBUG org.snmp4j.transport.DefaultUdpTransportMapping - Sending message to 172.25.2.20/40975 with length 71: 30:45:02:01:00:04:06:70:75:62:6c:69:63:a2:38:02:04:4f:76:6d:0a:02:01:00:02:01:00:30:2a:30:13:06:0b:2b:06:01:04:01:86:8d:1f:64:01:01:42:04:03:2b:00:00:30:13:06:0b:2b:06:01:04:01:86:8d:1f:64:01:02:42:04:02:a0:54:20
>When I snoop the UDP packets again I see that the request ID of the response PDU have value 0x4F766D0A
>
>Because the IDs are different, the response is not ignored from the agent.
>
>The GET request is generated from Cricket (http://cricket.sourceforge.net)
>
>Frank, can you reproduce the problem with the packet data I send to you?
>
>Regards,
>Angel
>
> 
>             
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