smb_addiconvtbl
error = smb_addiconvtbl("tolower", ssn->ioc_localcs, nls_lower);
error = smb_addiconvtbl("toupper", ssn->ioc_localcs, nls_upper);
error = smb_addiconvtbl(ssn->ioc_servercs, ssn->ioc_localcs,
error = smb_addiconvtbl(ssn->ioc_localcs, ssn->ioc_servercs,