Re: how to determine table query index in snmp subagent table handler?

On 10 November 2011 23:03, Dave Shield <[email protected]> wrote:
>> Example handler code:
>
>>    int index;
>
>>        for (request=requests; request; request=request->next) {
>>                index = request->index;
>
> Isn't this what you are looking for?


Sorry - you're right of course.
This is the index of the varbind within the incoming request
(1 for the first or only varbind, 2 for the second, etc).
    [ I really shouldn't try to respond to queries on the
      list, just before going to bed!]

The list of index value(s) as parsed from the incoming OID
can be retrieved using:


      for (request=requests; request; request=request->next) {
              netsnmp_table_request_info *table_info =
netsnmp_extract_table_info(request);

and the individual index values are accessible from table_info->indexes,
table_info->indexes->next_variable, etc
   These are normal VarBind structures, so ignore the OID fields, and just
look at the value field.


For a simple table (with a single integer index), it's probably easier
to extract thie index directly from the OID itself, but for more complex
tables (strings, OIDs or multiple indexes), it makes sense to use this
varbind list.

Dave

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