> I am in the middle of writing an agentx subagent. I have the handler all
> set up and registered using netsnmp_register_handler, it get my
> requests. The problem is I don't know what to do from there.
OK - first question: what sort of objects is this handler dealing with?
One scalar? A group of scalars? A table? A whole subtree?
The 'netsnmp_register_handler' API is a fairly general-purpose call.
You may find it easier to use one of the more specialised helpers,
that will handle much of the work for you.
> If I try to
> set the value of the requests->requestvp
How are you doing this?
What's the code?
> Does anyone know of an example subagent that is a little more in depth
> than the tutorial?
Bear in mind that the MIB module API is independent of whether it is
part of an AgentX subagent, or a master SNMP agent. So any of the
techniques used in the v5-style MIB modules in the main source
distribution should be applicable to your subagent.
> I am using netsnmp_create_handler_registration and
> netsnmp_register_handler. My handler function returns 0. Is that
> correct?
Ideally, I'd suggest you return SNMP_ERR_NOERROR (i.e. 0) for a
successful request, and the appropriate SNMP_ERR_xxx for a failure.
But it doesn't actually matter - this return value is ignored anyway!
It's more important to set the error using netsnmp_set_request_error()
> Also what is the expected way to return the values, just malloc
> the correct val and set it or what?
snmp_set_var_typed_value( requests->requestvb, ASN_TYPE,
(u_char *)&value, sizeof( value ));
But remember that 'requests' is actually a *list* of varbinds for
this handler, so you really need to wrap the processing in a loop
to pick up each one.
Again, see the main source code for examples.
Dave
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