On 07/09/06, Sebastian Bello <[EMAIL PROTECTED]> wrote:
> 1- the data from the MIB table will be collected periodically from other
> processes, and be probably cached for some time; is table_iterator the
> right choice?
It can certainly be used that way.
mib2c -S cache=1 -c mib2c.iterator.conf ...
should generate a suitable template.
> 2- mib2c created a list representing the table. Will net-snmp browse
> this table to look for the data or should the data be obtained from
> another source (programatically or from another data structure)?
The template code generated will walk this list.
You can set the cache_load routine to build it from some external source.
Alternatively, you can amend the get_{first,next} routines to read the
data from elsewhere instead. That list is primarily to illustrate how
to handle things, rather than forcing you to work this exact way.
> 3- where is the 'data context' stored (I don't see where it gets
> 'registered')? What is it for (to be able to keep an additional data
> structure other than the table itself)?
The data_context is your handle on a particular row of the table.
This is what's passed to the handler routine (via
'netsnmp_extract_iterator_context')
Your haqndler then uses this to retrieve the appropriate column value
from that particular row.
> 4- what information does the 'netsnmp_variable_list' hold in
> '_get_next_data_point' and '_get_first_data_point'?
The index value(s) for each row in turn.
> 5- is there a full documentation for the API (is there doc for
> 'snmp_set_var_typed_value' for example)?
Probably not.
There's some info on the project web pages (Documentation->API),
auto-generated from the code files. Not sure that this counts as
"full documentation" though.
Dave
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