On 24 May 2010 22:45, <[email protected]> wrote:
> where, specifically, in the netsnmp agent are these callback functions
> being called
I'm no expert on this particular helper, but from a quick look at the code,
the 'delete_row' callback is invoked from 'process_set_group', as part
of the final passes of SET processing (COMMIT, FREE and UNDO)
There seem to be three main uses:
- this helper holds two copies of the row being updated - "before" and "after"
In all three passes, the 'delete_row()' call back is used to release the
"before" copy once it's no longer required. (lines 706, 745 &
765 respectively)
- when a row is being created (but the request fails - FREE or UNDO), then
'delete_row()' is called to release the new entry (lines 740 and 769)
- when a row is being delete (e.g. via RowStatus destroy(6))
successfully (COMMIT),
then 'delete_row()' is called to release the relevant entry (line 728)
> Furthermore, can someone point me in the right direction as to where the
> netsnmp_table_array_callback functions are defined
The callback functions are defined as part of the code generated by mib2c.
The structure listing the various callbacks is defined in the header file
<net-snmp/agent/table_array.h>
> (I can't find the prototype for UserRowMethod anywhere.)
This is also defined in that header file - lines 89-90:
typedef netsnmp_index
*(UserRowMethod) (netsnmp_index *);
Dave
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