}
            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) ) {

        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() ) {

     * @throws CIFSException
     */
    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() ) {

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


    void ensureOpen ( int timeout ) throws IOException {
        this.closeTimeout = 0;
        if ( this.transportContext.getConfig().getNetbiosSoTimeout() != 0 ) {

        }
    }

    int getNextNameTrnId() {
        if(( ++nextNameTrnId & 0xFFFF ) == 0 ) {
            nextNameTrnId = 1;
        }
        return nextNameTrnId;
    }
    void ensureOpen( int timeout ) throws IOException {
        closeTimeout = 0;
        if( SO_TIMEOUT != 0 ) {
            closeTimeout = Math.max( SO_TIMEOUT, timeout );
        }