Question about netsnmp_call_handlers() function in snmp_agent.c

Hi,

I've a question regarding netsnmp_call_handlers(), if I have a SET pdu
as following:

set a=3D1, b=3D2, c=3D3

Is netsnmp_call_handlers() called once for all 3 varbinds, or it is
called three times, each for one varbind?
(one for 'a', one for 'b', one for 'c')?

Based on the code in handle_var_requests():

for (i=3D0; i<=3Dasp->treecache_num; i++)
{
...
netsnmp_call_handlers();
...
}

I tend to think netsnmp_call_handlers() is called 3 times, but I found
somewhere on internet talking about UCD-SNMP vs Net-SNMP which has
following:

Q: If an snmp querye PDU contains 3 (eg) varbinds, all from the same
table, in
the ucd code we know the agent sends 3 requests to the individual set
funcs
of the varbinds. If we go to the new style would the agent
"collect" these
and make a single call?=20
A: yes, the new style will collect into one request to the handler.
There is
even a 'row merge' helper which will break/merge it into one call per
row,
so all the requests for a certain row will come in together.

So I don't know how varbinds are passed to handlers (and write funcs in
ucd code)

Also is there any place I can find description regarding
asp->treecache[]? What is it for? What is asp->treecache_num?

Thanks,
Yong Chen


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