Aviator LDap writes:

The client/tools of OpenLDAP 2.3.33 contains tools for ldapsearch, modify, delete, etc., I need the same kind of tool for ldapadd. Do i need to write the code from the scratch? or is it available as any framework?

ldapadd and ldapmodify are the same program. You get ldapadd when you invoke it with that name or with the "-a" option. See man ldapadd.