2009/2/6 Rodolfo Leffa <rodolfole...@gmail.com>:
>> > I'd like to deal with all requests to a subtree of my mib in a single
>> > handler, but i don't know how to do it.
>>
>> Registering the root using 'netsnmp_register_handler()' does exactly
>> this. But it does mean that you have to deal with *everything* under
>> the specified root yourself. That can get quite complex.
>
> I think I will take my chances! I'm already dealing with the request to get
> the information I want from the devices managed, so i'll put some extra code
> to recognize when a request is not part of my MIB.
Simply recognising when a request isn't part of your MIB is relatively
straightforward. That's not where the problems tend to arise.
GET requests are simple - it's handling GETNEXT that takes more work.
You've got to take an (arbitrary) OID that falls within your MIB, and decide
which is the next valid instance.
>> What is the structure of the MIB you are trying to implement?
>
> The MIB is all consisted of Integers and Strings and enums. Like This:
>
> k3lDeviceCount OBJECT-TYPE
> SYNTAX Integer32
> MAX-ACCESS read-only
> STATUS current
> DESCRIPTION "Numero de placas ativas no sistema."
> ::= { KhompDataDeviceCount}
Errr... that doesn't look valid.
I'd normally expect to see something like
k3lDeviceCount .... ::== { khompDataDeviceCount 1 }
(and similarly for k3lDeviceType)
> linkCount OBJECT-TYPE
> SYNTAX Integer32
> MAX-ACCESS read-only
> STATUS current
> DESCRIPTION "Numero de links."
> ::= { KhompDataDeviceConfig 1 }
>
> channelCount OBJECT-TYPE
> SYNTAX Integer32
> MAX-ACCESS read-only
> STATUS current
> DESCRIPTION "Numero de canais."
> ::= { KhompDataDeviceConfig 2 }
Those look better - except that the parent name ought to start
with a lower-case letter.
You probably ought to run your MIB through some form of
MIB validation (e.g. http://www.simpleweb.org/ietf/mibs/validate/)
The Net-SNMP MIB parsing code is relatively forgiving, and will
accept invalid input.
> The MIB is all consisted of Integers and Strings and enums.
If they are all single values (rather than tables), then I'd
suggest you use "netsnmp_register_scalar()" to register
the objects individually, or "netsnmp_register_scalar_group()"
to register them in clumps.
Dave
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