req.setFlags(Smb2IoctlRequest.SMB2_O_IOCTL_IS_FSCTL);
        req.setInputData(
            new ValidateNegotiateInfoRequest(
                negoReq.getCapabilities(),
                negoReq.getClientGuid(),
                (short) negoReq.getSecurityMode(),
                negoReq.getDialects()));

        Smb2IoctlResponse resp;
        try {
            resp = send(req, RequestParam.NO_RETRY);
        }