ldctl_oid

Object identifier (OID) for the control. 

ldctl_value

berval structure containing the value used by the control for the operation.

ldctl_iscritical

LDAP_OPT_ON indicates the control is critical to the operation. If the control is critical to the operation but not supported, the server returns LDAP_UNAVAILABLE_CRITICAL_EXTENSION.

LDAP_OPT_OFF indicates the control is not critical.