Implementing SSS/VLV, questions.

[Konstantin Kunshchikov <kvk@elbrus.ru>]

Hello!

I'm investigate the idea of implementing SSS/VLV extensions in OpenLDAP.
How it is the best way for implement this? 
I think using SLAPI for these purposes not so well as by a code - the
server not ready for this purpose.
Whether it is necessary to modify struct Operation and
slap_send_search_entry() or is it possible to do with callback such as
op->o_callback()?
How to notify o_callback() on last result (the termination) of the
search to return sorted results back to the client?

Thanks,
Konstantin.