WinSync Plugin improvements


Overview

This doc describes the enhancements added to the Windows Sync.

1. Support multiple subtrees

Windows Sync was originally designed between a subtree on the Directory Server (DS) and the Active Directory (AD), for instance, “ou=People,dc=example,dc=com” on the Directory server and “cn=Users,dc=example,dc=com” on the Active Directory. But there is a requirements to synchronize between more pairs, which allows to sync entries under ou=People as well as ou=Groups, separately.

2. Support filters

There is a requirement to restlict entries under the subtree by filters. For inctance, by setting (|(cn=user)(cn=group)), only entries which contain “user” or “group” in the cn value are synchronized.

3. Support range retrieval

AD returns up to MaxValRange number of multi-valued attribute values in one search. If more attribute values exist, unless WinSync in DS does not repeat the search with increasing the range, DS cannot retrieve all the values. The repeated range retrieval is added.

Configuration

1. Support multiple subtrees

new config parameter in windwows sync agreement:
winSyncSubtreePair: DS_Subtree:AD_Subtree

Example:
winSyncSubtreePair: ou=OU1,dc=DSexample,dc=com:ou=OU1,DC=ADexample,DC=com
winSyncSubtreePair: ou=OU2,dc=DSexample,dc=com:ou=OU2,DC=ADexample,DC=com
winSyncSubtreePair: ou=OU3,dc=DSexample,dc=com:ou=OU3,DC=ADexample,DC=com

2. Support filters

new config parameters in windwows sync agreement:
winSyncWindowsFilter: additional_filter_on_AD
winSyncDirectoryFilter: additional_filter_on_DS
				     
Example:
winSyncWindowsFilter: (|(cn=*user*)(cn=*group*))
winSyncDirectoryFilter: (|(uid=*user*)(cn=*group*))

3. Support range retrieval

None.

Implementation Details

1. Support multiple subtrees

2. Support filters

3. Support range retrieval

AD returns up to MaxValRange number of multi-valued attribute values in one search. If more attribute values exist, subtype “;range=0-(MaxValRange-1)” is added to the type. AD Client (DS in this case) has to repeat the search with “;range=MaxValRange-” then “;range=(2MaxValRange)-” and so on until the values with the subtype “;range=low-” are returned.

Last modified on 10 November 2014