273         except ldap.LDAPError: # Invalid protocol version, fall back safely

   273         except ldap.LDAPError: # Invalid protocol version, fall back safely

   274             conn.set_option(ldap.OPT_PROTOCOL_VERSION, ldap.VERSION2)

   274             conn.set_option(ldap.OPT_PROTOCOL_VERSION, ldap.VERSION2)

   275         # Deny auto-chasing of referrals to be safe, we handle them instead

   275         # Deny auto-chasing of referrals to be safe, we handle them instead

   276         # Required for AD

   276         # Required for AD

   277         try:

   277         try:

   279         except ldap.LDAPError: # Cannot set referrals, so do nothing

   279         except ldap.LDAPError: # Cannot set referrals, so do nothing

   281         #conn.set_option(ldap.OPT_NETWORK_TIMEOUT, conn_timeout)

   281         #conn.set_option(ldap.OPT_NETWORK_TIMEOUT, conn_timeout)

   282         #conn.timeout = op_timeout

   282         #conn.timeout = op_timeout

   283         # Now bind with the credentials given. Let exceptions propagate out.

   283         # Now bind with the credentials given. Let exceptions propagate out.

   284         if user is None:

   284         if user is None:

   285             # XXX always use simple bind for data connection

   285             # XXX always use simple bind for data connection