[SNMP4J] v2c agent
Frank Fock
fock at agentpp.com
Wed May 23 21:42:35 CEST 2007
Hi Nidhin,
OK, now I got the point. The following patch
solves the issue:
Index: DefaultMOTable.java
===================================================================
--- DefaultMOTable.java (revision 231)
+++ DefaultMOTable.java (working copy)
@@ -454,7 +454,7 @@
}
}
else {
- if (cell.getIndex() == null) {
+ if (cell.getColumn() >= 0) {
request.getVariableBinding().setVariable(Null.noSuchInstance);
}
else {
Best regards,
Frank
nidhin wrote:
> Hi Frank,
>
> I tested using SNMP SimpleTester. One test case in that specifies
> that the SNMPv2C agent is expected to return a noSuchObject value for
> Get requests if request is sent with following condition.
>
> :: In the case of a tableEntry with 5 columns and a get request will be
> sent for tableEntry.6.
>
> I think this is a valid test case. Please correct me if I am wrong.
>
> Regards
> Nidhin
>
>
> */Frank Fock <fock at agentpp.com>/* wrote:
>
> Hi Nidhin,
>
> OK, but this is the expected result, since snmpTargetAddrEntry
> is a registered ManagedObject of the TestAgent.
> Can you reproduce it with an OID for which no registration
> exists in the path to the root OID?
>
> Best regards,
> Frank
>
> nidhin wrote:
> > Hi Frank,
> >
> > I used the snmp4j-agent-1.1.2.zip code to reproduce this issue.
> >
> > OID which i gave is 1.3.6.1.6.3.12.1.2.1.10
> >
> > Response from the test agent is
> >
> > ***** SNMP PROMPT FOR OID-RESPONSE START *****
> > 1: snmpTargetAddrEntry.10 (nosuchinstance) no such instance
> > ***** SNMP PROMPT FOR OID-RESPONSE END *****
> >
> > Regards
> > Nidhin
> >
> >
> > */Frank Fock /* wrote:
> >
> > Hi Nidhin,
> >
> > When I run a GET request with that OID on the TestAgent
> > noSuchObject is returned. Can you provide an OID that
> > reproduces the problem with the TestAgent?
> >
> > Thanks in advance,
> > Frank
> >
> > nidhin wrote:
> > > Hi Frank,
> > >
> > > Yes, the tested OID is indeed outside of any registered
> > ManagedObject.
> > >
> > > Regards
> > > Nidhin
> > >
> > > */Frank Fock /* wrote:
> > >
> > > Hi Nidhin,
> > >
> > > The question is whether the tested OID is indeed outside
> > > of any registered ManagedObject of the agent or not?
> > >
> > > Best regards,
> > > Frank
> > >
> > > nidhin wrote:
> > > > Hi Frank,
> > > >
> > > > Following is the description of the test case.
> > > >
> > > > Description:
> > > > # This test checks the agents ability to process SNMP Get/Getnext
> > > > requests
> > > > # for non existent MIB variables. A get, getnext request is
> sent to
> > > > # the agent for a MIB variable that is not part of the group or
> > > table.
> > > > # A SNMPv1 agent is expected to return a lexicographically larger
> > > > variable
> > > > # for GetNext or NO_SUCH_NAME for Get requests. A SNMPv2C
> agent is
> > > > expected
> > > > # to return a lexicographically larger variable for GetNext or
> > > > noSuchObject
> > > > # value for Get requests.
> > > > #
> > > > # Example: The system group in MIBII has 7 attributes. A
> request is
> > > > # sent with system.8 which is one larger than the last attribute
> > > > # in that group. In the case of a tableEntry with 5 columns, a
> > > > # request will be sent for tableEntry.6
> > > > #
> > > > # Note: An SNMPv1 agent should return a NO_SUCH_NAME error (and a
> > > > SNMPv2C agent
> > > > # a endOfmib value) for a GetNext operation on the last variable
> > > > supported.
> > > > # While this may be flagged as an error, this is a valid
> > > > response, if the
> > > > # variable is indeed the last variable.
> > > >
> > > > ---------------------------------------------------------------
> > > >
> > > > So my agent returns me No such instance error instead of a
> > > noSuchObject
> > > > error if get request is sent to the agent for a MIB variable that
> > > is not
> > > > part of the group or table.
> > > >
> > > > Please reply if I have missed some point.
> > > >
> > > > Regards
> > > > Nidhin
> > > >
> > > >
> > > > */Frank Fock /* wrote:
> > > >
> > > > Hi Nidhin,
> > > >
> > > > Without knowing the agent's instrumentation it is hard to say
> > > > whether this is an error or not. I cannot reproduce such
> > > > a problem with my agent.
> > > >
> > > > Best regards,
> > > > Frank
> > > >
> > > > nidhin wrote:
> > > > > Hi,
> > > > >
> > > > > For the following test v2c agent fails to respond back with
> > > > proper error message.
> > > > >
> > > > > I have used v1.1.2 SNMP4j agent jars
> > > > >
> > > > > Test case:
> > > > >
> > > > > process SNMP Get/Getnext requests for non existent MIB
> variables.
> > > > >
> > > > > Result:
> > > > >
> > > > >
> > > >
> > >
> >
> ############################################################################
> > > > > # Test Results: A response value contained an error type
> > > > > # (NoSuchInstance) other than NoSuchObject.
> > > > > # Test Rating: POOR
> > > > > # Message Exchange:
> > > > > #
> > > > > # (Mon May 21 14:09:20 2007):
> > > > > # Get Request: Version = SNMPv2c, Community = public
> > > > > # Request Id = 61, Error Status = No Error , Error Index = 0
> > > > > # Oid1 = 1.3.6.1.4.1.1456.20.2.38.6.1.6 , Type = NULL, Value
> > = NULL
> > > > > #
> > > > > # (Mon May 21 14:09:20 2007):
> > > > > # Response: Version = SNMPv2c, Community = public
> > > > > # Request Id = 61, Error Status = No Error , Error Index = 0
> > > > > # Oid1 = 1.3.6.1.4.1.1456.20.2.38.6.1.6 , Type =
> NoSuchInstance,
> > > > Value = NULL
> > > > >
> > > >
> > >
> >
> ############################################################################
> > > > >
> > > > > Regards
> > > > > Nidhin
> > > > >
> > > > >
> > > > > ---------------------------------
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