> I am attempting to extend net-snmp as an application monitoring tool,
> and am running into a problem:
>
> Is there a simple way to get net-snmp to send dynamically configured
> periodic traps? In other words, for any registered variable in the
> agent, I want to be able to have the variable sent to a trap sink at a
> configurable time interval, and I want to trigger/de-trigger which
> variables get sent while the agent is running. I am only interested
in
> doing this for explicitly specified variables (e.g. via SNMP_MSG_GET,
> not *_GETNEXT).
>
What I've done to make this happen is to use the snmp_alarm_register()
mechanism to get called back when it is time to send a trap.
Here's a code fragment that's invoked whenever the update interval is
set/changed:
/* Unregister before updating */
if ( pApp->hHeartBeatAlarm > 0 )
snmp_alarm_unregister( pApp->hHeartBeatAlarm );
pApp->hHeartBeatAlarm = snmp_alarm_register( iVal, SA_REPEAT,
SendHeartBeatTrap, pApp );
where SendHeartBeatTrap() is my function that builds the trap vars and
then calls send_enterprise_trap_vars() to send the trap.
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