2009/5/1 <[email protected]>:
> I want to call a function after snmpd sends cold-start after startup.
That's done in the file "snmpd.c" - in the routine main().
Look for the call to
send_easy_trap(0. 0);
(probably around line 950, or 1020 depending on version)
> For this i dont want to put any code change in netsnmp standard files.
> I want to use a handler that will be called just after the sending of
> cold-start trap.
There isn't any such hook currently - you probably *would* have to
add code to the standard files to implement this.
Probably the simplest would be to define a new agent callback
(see includes/net-snmp/agent/agent_callbacks.h)
and invoke this immediately after the send_easy_trap(0, 0) call.
The init routine of your module could then register a callback,
using snmp_register_callback() - see init_agent_sysORTable
for an example.
If you really don't want to touch the standard code, then you
could try registering a callback function for one (or both)
of the two SEND_TRAP callbacks. This would be invoked
whenever the agent sent *any* trap.
Your routine could then check whether this was the initial
coldStart trap, and take appropriate action. But that's a
fairly ugly solution, IMO. A new callback would be much cleaner.
Dave
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