RFC 3088 (rfc3088) - Page 2 of 11

OpenLDAP Root Service An experimental LDAP referral service

RFC 3088                 OpenLDAP Root Service                April 2001


1.1.  The Glue

   Most existing LDAP implementations do not support location of
   directory services using DNS SRV resource records.  However, most
   servers support generation of referrals to "superior" server(s).
   This service provides a "root" LDAP service which servers may use as
   their superior referral service.

   Client may also use the service directly to locate services
   associated with an arbitrary Distinguished Name [RFC 2253] within the
   domain based hierarchy.

   Notice:
     The mechanisms used by service are experimental.  The descriptions
     provided by this document are not definitive.  Definitive
     mechanisms shall be published in a Standard Track document(s).

2. Generating Referrals based upon DNS SRV RRs

   This service returns referrals generated from DNS SRV resource
   records [RFC 2782].

2.1. DN to Domain Name Mapping

   The service maps a DN [RFC 2253] to a fully qualified domain name
   using the following algorithm:

       domain = null;
       foreach RDN left-to-right        // [1]

       {
           if not multi-valued RDN and
               RDN.type == domainComponent
           {
               if ( domain == null || domain == "." )
               {   // start
                   domain = "";
               }
               else
               {   // append separator
                   domain .= ".";
               }

               if ( RDN.value == "."  )
               {   // root
                   domain = ".";
               }
               else



Zeilenga                      Experimental