Re: Run-time registered controls

[Pierangelo Masarati <ando@sys-net.it>]

Kurt D. Zeilenga wrote:

> I've updated controls.c/backends.c with a kludge which provide
> proper criticality handling.
>  
I'm getting more and more convinced that the design of 
backend_check_controls() is obsoleted by current code design.  It 
originated from the need to check whether a certain backend was able to 
handle a specific control when control handling implementations were 
essentially backend-specific; now we're moving towards an implementation 
of control handling that it rather overlay-centric, allowing the same 
implementation to be shared by different backends and thus moving it a 
bit towards the frontend, in the no man's land between the two.  So 
either we make backend_check_controls() be intercepted by overlays, or 
we design a different type of check, e.g. something that is invoked at 
the fronted level and uses the requestDN as a hint to trace what path 
the handling of the request will take.  This would likely require 
multiple select_backend() invocations, unless we group the two tasks, 
and let backend_check_controls(), or even backend_check_restrictions(), 
return the selected and validated database.

p.





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