Re: Help with modules

[Herb Hrowal <hhrowal@gmail.com>]

On Fri, 24 Sep 2004 14:48:56 -0700, Howard Chu <hyc@symas.com> wrote:
> Herb Hrowal wrote:
> 
> >I'm new to OpenLDAP and have some questions on "plug-ins".
> >
> >Is there any plug-in api other than the backend support?
> >
> >
> Yes, several in fact. The main one of interest for your question is
> called an "overlay."
> 
> >Is it possible for a backend to modify a request before it is sent to
> >other backend modules?
> >
> >
> Yes, using an overlay.
> 
> >Is there any way to insert a shim between the frontend and the various
> >backends we use other than to modify OpenLDAP.
> >
> >
> Yes, that's what overlays are.
> 
> >If a shim is possible, can it specify which backend handles the request?
> >
> >
> Not quite. Instead, you specify which overlays to use on a particular
> backend.
> 
> >Is there any good documentation on writing backends?
> >
> >
> Everything you need to know is in the source tree. The file
> servers/slapd/overlays/slapover.txt may help you.

Thank you for the help, Howard. I'm assuming this is in the 2.2
codebase only. We're still using 2.1 at our installation. Was
something like this possible in 2.1 or do I need to convince the
powers that be that 2.2 is essential?

Thanks,

Herb