Re: multiple Sub-agents managing the same table

Thanks.


>From: "Dave Shield" <[email protected]>
>To: "Arnaud BODENAN" <[email protected]>
>CC: [email protected]
>Subject: Re: multiple Sub-agents managing the same table
>Date: Mon, 4 Sep 2006 13:56:07 +0100
>
>On 04/09/06, Arnaud BODENAN <[email protected]> wrote:
> >         
>netsnmp_register_table_data_set(netsnmp_create_handler_registration
> >                                     ("genServerTable",
> >                                      NULL,
> >                                      genServerTableOid,
> >                                      genServerTableOidLen,
> >                                      HANDLER_CAN_RWRITE), 
>genServerTable,
> > NULL);
>
>But that's registering the whole table.
>You don't want to do that - you need to register individual rows.
>
> > Moreover, when I execute the second binary, I have no error message so 
>it
> > seems to work ok.
>
>Well, given that you don't actually check the return value of the
>netsnmp_register_xxx
>call, that feels something of an optimistic assumption!
>
>
>As I said - the Net-SNMP agent has typically been used for
>implementing full OID subtrees (i.e. complete tables) and most of the
>helper modules have been designed with that model in mind.  If you're
>trying to split a table across several subagents, you're going to have
>to do a *lot* more work yourself.
>
>Start by having a look at the AgentX specifications, where it talks
>about "OID ranges".  That's the model that has been used in the
>Net-SNMP agent, so it's important to understand how this works before
>proceeding.
>    Then you'll have to register each row individually (probably in
>addition to registering the whole table) - which I suspect will
>require using the 'agent_registry.c' APIs.
>
>I'm afraid that you're on somewhat uncharted territory here, and
>there's a limit to the amount of help we can provide.  I'm not sure
>any of the core developers have actually tried to implement such a
>split-agent table.
>       [If I'm wrong about this, now would be a good time to speak up!!]
>
>And I give you due warning - the two or three weeks before the start
>of a new academic year is *the* busiest period of the whole year for
>me, so I won't have much time or energy for non-essential stuff (like
>this project).
>
>Good Luck.
>
>Dave
>
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Get stuff done quickly with pre-integrated technology to make your job easier
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