[Fedora-directory-devel] Support for bitwise operations?

[Richard Megginson]

Andrew Bartlett wrote:
> On Mon, 2007-03-12 at 13:36 -0700, Pete Rowley wrote:
>   
>> Andrew Bartlett wrote:
>>     
>>> It seems to me that Fedora DS does not support Microsoft's extended
>>> match bitwise operations. 
>>>
>>> I chatted with Pete about it on IRC, but thought to document it here for
>>> discussion.  While it would be technically possible for me to filter
>>> these on the client side, it becomes silly fast.  I need the LDAP
>>> backend side to handle these.
>>>
>>> This is the kind of search Fedora DS needs to accept, for Samba4 to use
>>> it as a backend:
>>> (|(&(!(groupType:1.2.840.113556.1.4.803:=1))(groupType:1.2.840.113556.1.4.803:=2147483648)(groupType:1.2.840.113556.1.4.804:=10))
>>>
>>>   
>>>       
>> Basic question: why are you storing bit fields in the first place? Why 
>> not store the information in a more readily accessible fashion, both to 
>> your code, and the administrator of the system? As you noted, the 
>> bitwise extensible matches are Microsoft extensions and they have not 
>> been specified in any RFC or IETF draft document AFAIK.  Consequently 
>> you should not expect the functionality to be generally available in 
>> LDAP directory servers.
>>     
>
> Looking over this, it seems possible to write this as a slapi plugin,
> which I can then host (no doubt with other random hacks/patches/etc to
> make this thing happen) in Samba's lorikeet repository.  
>
> I've looked around, and I can't find a free skeleton slapi module to
> work/hack from, aside from this one:
> http://docs.sun.com/source/817-7617/matching.html (which I won't use,
> because the copyright status is unclear to me).
>
> Is there an example matching rule plugin (that I can use in Fedora DS)
> out there?  
>   
Not that I know of.  Of course, the collation plugin is an "example" of 
a matching rule plugin - 
http://cvs.fedora.redhat.com/viewcvs/ldapserver/ldap/servers/plugins/collation/?root=dirsec
> Andrew Bartlett
>
>   
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>
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