Re: Unexpected agent behaviour when walking a MIB

[email protected] wrote on 15/09/2011 13:50:36:

> On 15 September 2011 13:24,  <[email protected]> wrote:
> >
> > If so, how do I know what these conditions are so that I can code up 
my
> > handler accordingly?
> 
> The basic question is which helpers (if any) you are using.
> Most of the mib2c templates use one of these "knowledgeable" table
> helpers, so don't need to worry about GETNEXT.   The template
> code that is produced explicitly says this.
>    The main exception is probably the raw table template,
> which simply handles the OID index parsing, but not much else.
> 
> 
> Whether you need to worry about GetNext depends on exactly how your
> module is being registered.    Which is one reason why I suggested that
> you post the code.

OK. It looks like I need to know which function is called as a result of 
calling the Perl wrapper function 'register' in order to understand how 
the agent will behave.

Here is an extract from my perl script that creates the subagent and 
registers the call-back handlers with the master agent.

netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID, 
NETSNMP_DS_AGENT_X_SOCKET,  "tcp:localhost:30000");

# create the subagent
my $agent = new NetSNMP::agent('Name' => 'my_agent_name',
                               'AgentX' => 1);

# register the handlers

my $root_OID = ".1.3.6.1.4.1.2257.11.1.1";
my $ssaApplication_OID = new NetSNMP::OID($root_OID . ".1");
my $ssaNetwork_OID     = new NetSNMP::OID($root_OID . ".2");

my $statusCode; 

$statusCode = $agent->register("my_agent_name", 
                               $ssaApplication_OID, 
 \&SSAApplicationMIB::ssa_application_mib_handler);

$statusCode = $agent->register("my_agent_name", 
                               $ssaNetwork_OID, 
                               \&SSANetworkMIB::ssa_network_mib_handler);
 
my $running = 1;
while($running) 
{
   $agent->agent_check_and_process(1);
}

$agent->shutdown();




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