Re: virtual list view, control value absent

[Howard Chu <hyc@symas.com>]

Dieter Kluenter wrote:
> Hi,
> I am experimenting with server side sorting and virtual list
> view. While SSS does what it should do, vlv provides some
> headaches. Although sss control and vlv control are passed to the
> server, I get following error:
>
> ,----[ slapd debug output ]
> | =>  get_ctrls: oid="1.2.840.113556.1.4.473" (critical)
> | =>  get_ctrls: oid="2.16.840.1.113730.3.4.9" (critical)
> |<= get_ctrls: n=2 rc=2 err="vlv control value is absent"
> `----
>
> What kind of vlv control value is missing?
>
> My vlv object, written in perl, is:
>
> ,----[ vlv object ]
> | $vlv = Net::LDAP::Control::VLV->new(
> | 		 after   =>  1,
> | 		 before  =>  0,
> | 		 content =>  0,
> | 		 offset  =>  1,
> | 		 critical =>  'TRUE',
> | 	       );
> `----

The error message indicates that none of the after/before/content/offset 
parameters are present in the control that the server received. You should 
probably start by looking at the packet debug output on slapd to see what it 
actually received. I suspect Net::LDAP is not generating this control correctly.

You can also test with ldapsearch. This control parsing stuff is all done 
generically by the slapd frontend and it's known to be correct since OpenLDAP 
2.0 days...
> my sss object looks like
>
> ,----[ sss object ]
> | $sort = Net::LDAP::Control::Sort->new(
> | 		 order    =>  'sn:2.5.13.3',
> |                  critical =>  'TRUE',
> |               );
> `----
>
>
> my search object:
>
> ,----[ search object ]
> | my @args = (
> | 	    base =>  'ou=benchmark,o=avci,c=de',
> | 	    scope =>  'one',
> | 	    attrs =>  [ "$attrs[0]","$attrs[1]","$attrs[2]" ]);
> | 	    filter =>  $filter,
> | 	    control =>  [ $sort, $vlv ],
> | 	  );
> | $msg = $ldap->search( @args );
> `----
>
> -Dieter


--
  -- Howard Chu
  CTO, Symas Corp.           http://www.symas.com
  Director, Highland Sun     http://highlandsun.com/hyc/
  Chief Architect, OpenLDAP  http://www.openldap.org/project/