Re: [ldapext] draft-zeilenga-ldap-dontusecopy: criticality

[Michael Ströder <michael@stroeder.com>]

Kurt Zeilenga wrote:
> On Jul 17, 2008, at 3:27 PM, Michael Ströder wrote:
>
> > draft-zeilenga-ldap-dontusecopy-06.txt says:
> > "The criticality MUST be TRUE."
> >
> > What's the rationale for being so strict?
>
> Primarily so that the semantic is a boolean, and hence can be mapped 
> directly to the X.511 dontUseCopy option.  Also, I don't see much of a 
> difference in no control versus a non-critical control in this case, as 
> both would allow the server to use copies.

Well, I'd like to use it in a case where my client would accept "best 
effort" of the server not to use a copy. Otherwise I would have to send 
the control with criticality TRUE and re-send the same request without 
the control in case of unavailableCriticalExtension returned by the server.

The main problem is that it's impossible to find out whether a server 
supports a certain control (within a particular naming context) without 
sending it. (And even if you send it and unavailableCriticalExtension 
you cannot really tell if the client sent several critical controls.)

Ciao, Michael.
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