* @param config
     * @param controlCode
     * 
     */
    public Smb2IoctlRequest ( Configuration config, int controlCode ) {
        this(config, controlCode, Smb2Constants.UNSPECIFIED_FILEID);
    }


    /**
     * @param config
     * @param controlCode
     * @param fileId
     */
    public Smb2IoctlRequest ( Configuration config, int controlCode, byte[] fileId ) {
        super(config, SMB2_IOCTL);

                        // needs read access
                        Smb2IoctlRequest copy = new Smb2IoctlRequest(
                            sh.getConfig(),
                            write ? Smb2IoctlRequest.FSCTL_SRV_COPYCHUNK_WRITE : Smb2IoctlRequest.FSCTL_SRV_COPYCHUNK,
                            dfd.getFileId());
                        copy.setFlags(Smb2IoctlRequest.SMB2_O_IOCTL_IS_FSCTL);

              SmbTreeHandleImpl th = fd.getTree() ) {
            if ( th.isSMB2() ) {
                Smb2IoctlRequest req = new Smb2IoctlRequest(th.getConfig(), Smb2IoctlRequest.FSCTL_PIPE_PEEK, fd.getFileId());
                req.setMaxOutputResponse(16);
                req.setFlags(Smb2IoctlRequest.SMB2_O_IOCTL_IS_FSCTL);
                Smb2IoctlResponse resp = th.send(req, RequestParam.NO_RETRY);

              SmbTreeHandleImpl th = fh.getTree() ) {

            if ( th.isSMB2() ) {
                Smb2IoctlRequest req = new Smb2IoctlRequest(th.getConfig(), Smb2IoctlRequest.FSCTL_PIPE_TRANSCEIVE, fh.getFileId(), inB);
                req.setFlags(Smb2IoctlRequest.SMB2_O_IOCTL_IS_FSCTL);
                req.setInputData(new ByteEncodable(buf, off, length));
                req.setMaxOutputResponse(maxRecvSize);

                        && ( this.ctlCode == Smb2IoctlRequest.FSCTL_SRV_COPYCHUNK || this.ctlCode == Smb2IoctlRequest.FSCTL_SRV_COPYCHUNK_WRITE ) )
                && ! ( status == NtStatus.NT_STATUS_BUFFER_OVERFLOW && ( this.ctlCode == Smb2IoctlRequest.FSCTL_PIPE_TRANSCEIVE
                        || this.ctlCode == Smb2IoctlRequest.FSCTL_PIPE_PEEK || this.ctlCode == Smb2IoctlRequest.FSCTL_DFS_GET_REFERRALS ) )

        log.debug("Sending VALIDATE_NEGOTIATE_INFO");
        Smb2IoctlRequest req = new Smb2IoctlRequest(sess.getConfig(), Smb2IoctlRequest.FSCTL_VALIDATE_NEGOTIATE_INFO);
        req.setFlags(Smb2IoctlRequest.SMB2_O_IOCTL_IS_FSCTL);
        req.setInputData(
            new ValidateNegotiateInfoRequest(
                negoReq.getCapabilities(),

            DfsReferralResponseBuffer dfsResp;
            if ( isSMB2() ) {
                Smb2IoctlRequest req = new Smb2IoctlRequest(ctx.getConfig(), Smb2IoctlRequest.FSCTL_DFS_GET_REFERRALS);
                req.setFlags(Smb2IoctlRequest.SMB2_O_IOCTL_IS_FSCTL);
                req.setInputData(dfsReq);
                dfsResp = ipc.send(req).getOutputData(DfsReferralResponseBuffer.class);