added methods read_rootdse_s() and get_naming_contexts()

CHANGES

@@ -10,6 +10,8 @@ Lib/
 * LDAPObject.unbind_ext() now removes class attribute
   LDAPObject._l to completely invalidate C wrapper object
 * LDAPObject.unbind_ext() now flushes trace file
+* ldap.ldapobject.SimpleLDAPObject:
+  added convenience methods read_rootdse_s() and get_naming_contexts() 
 * added functions ldap.strf_secs() and ldap.strp_secs()
 * added function ldap.filter.time_span_filter()
 * Refactored ldif.LDIFParser
@@ -1270,4 +1272,4 @@ Released 2.0.0pre02 2002-02-01
 ----------------------------------------------------------------
 Released 1.10alpha3 2000-09-19
 
-$Id: CHANGES,v 1.385 2016/07/24 16:05:28 stroeder Exp $
+$Id: CHANGES,v 1.386 2016/07/24 16:24:44 stroeder Exp $

Lib/ldap/ldapobject.py

@@ -3,7 +3,7 @@
 
 See http://www.python-ldap.org/ for details.
 
-\$Id: ldapobject.py,v 1.155 2016/07/17 14:49:22 stroeder Exp $
+\$Id: ldapobject.py,v 1.156 2016/07/24 16:22:32 stroeder Exp $
 
 Compability:
 - Tested with Python 2.0+ but should work with Python 1.5.x
@@ -745,6 +745,26 @@ def find_unique_entry(self,base,scope=ldap.SCOPE_SUBTREE,filterstr='(objectClass
       raise NO_UNIQUE_ENTRY('No or non-unique search result for %s' % (repr(filterstr)))
     return r[0]
 
+  def read_rootdse_s(self, filterstr='(objectClass=*)', attrlist=None):
+    """
+    convenience wrapper around read_s() for reading rootDSE
+    """
+    ldap_rootdse = self.read_s(
+      '',
+      filterstr=filterstr,
+      attrlist=attrlist or ['*', '+'],
+    )
+    return ldap_rootdse  # read_rootdse_s()
+
+  def get_naming_contexts(self):
+    """
+    returns all attribute values of namingContexts in rootDSE
+    if namingContexts is not present (not readable) then empty list is returned
+    """
+    return self.read_rootdse_s(
+      attrlist=['namingContexts']
+    ).get('namingContexts', [])
+
 
 class NonblockingLDAPObject(SimpleLDAPObject):