def convert_in_oid(service_name):
    """
    calculate the correct OID for the service name
    """
    s = service_name
    # convert the service_name to ascci
    service_ascii = [ord(c) for c in s] 
    # we need the length of the service name
    length = str(len(s))
    # make the oid
    oid = base_oid + "." + length + "." + ".".join(str(x) for x in service_ascii)
    return oid