return this.handle.ensureTreeConnected();
    }

    @Override
    protected synchronized SmbFileHandleImpl ensureOpen() throws CIFSException {
        return this.handle.ensureOpen();
    }

    /**
     * Gets the pipe handle implementation for this output stream.
     *
     * @return the handle
     */
    protected SmbPipeHandleImpl getHandle() {

            } else {
                throw new IllegalArgumentException("Invalid mode");
            }

            try (SmbFileHandle h = ensureOpen()) {}
            this.readSize = th.getReceiveBufferSize() - 70;
            this.writeSize = th.getSendBufferSize() - 70;

            if (th.hasCapability(SmbConstants.CAP_LARGE_READX)) {

        return this.handle.ensureTreeConnected();
    }

    @Override
    protected synchronized SmbFileHandleImpl ensureOpen() throws CIFSException {
        return this.handle.ensureOpen();
    }

    /**
     * This stream class is unbuffered. Therefore this method will always
     * return 0 for streams connected to regular files. However, a

            pipe.send(new TransCallNamedPipe(path, b, off, len), new TransCallNamedPipeResponse(pipe));
        } else if ((pipe.pipeType & SmbNamedPipe.PIPE_TYPE_TRANSACT) == SmbNamedPipe.PIPE_TYPE_TRANSACT) {
            ensureOpen();
            final TransTransactNamedPipe req = new TransTransactNamedPipe(pipe.fid, b, off, len);
            if (dcePipe) {
                req.maxDataCount = 1024;
            }

        this.access = access | SmbConstants.FILE_WRITE_DATA;

        try (SmbTreeHandleImpl th = file.ensureTreeConnected()) {
            this.smb2 = th.isSMB2();
            try (SmbFileHandleImpl fh = ensureOpen()) {
                if (append) {
                    this.fp = fh.getInitialSize();
                }
                init(th);
                if (!append && this.smb2) {

     */
    @Override
    public boolean isStale() {
        return !this.open || this.handle != null && !this.handle.isValid();
    }

    @Override
    public synchronized SmbFileHandleImpl ensureOpen() throws CIFSException {
        if (!this.open) {
            throw new SmbException("Pipe handle already closed");
        }

        if (!isOpen()) {

     */
    public void open() throws CIFSException {
        try (SmbFileHandleImpl fh = ensureOpen()) {}
    }

    /**
     * @param file
     * @param openFlags
     * @return
     * @throws SmbException
     */
    synchronized SmbFileHandleImpl ensureOpen() throws CIFSException {
        if (this.handle == null || !this.handle.isValid()) {

    /**
     * Ensures that the file handle is open and returns it.
     *
     * @return file handle
     * @throws CIFSException if an error occurs opening the file
     */
    SmbFileHandle ensureOpen() throws CIFSException;

    /**
     * Receive data from the pipe
     *
     * @param buf buffer to receive data into
     * @param off offset in the buffer
     * @param length maximum length to receive

     *
     * @return true if the stream is open, false otherwise
     */
    public boolean isOpen() {
        return file.isOpen();
    }

    void ensureOpen() throws IOException {
        // ensure file is open
        if (!file.isOpen()) {
            file.open(openFlags, access | SmbConstants.FILE_WRITE_DATA, SmbFile.ATTR_NORMAL, 0);
            if (append) {

        }
    }

    int getNextNameTrnId() {
        if ((++nextNameTrnId & 0xFFFF) == 0) {
            nextNameTrnId = 1;
        }
        return nextNameTrnId;
    }

    void ensureOpen(final int timeout) throws IOException {
        closeTimeout = 0;
        if (SO_TIMEOUT != 0) {
            closeTimeout = Math.max(SO_TIMEOUT, timeout);
        }