handle.sendrecv(rpc);
        if ( rpc.retval != 0 ) {
            throw new SmbException(rpc.retval, false);
        }
        this.opened = true;
    }


    @Override
    public synchronized void close () throws IOException {
        if ( this.opened ) {
            this.opened = false;
            MsrpcSamrCloseHandle rpc = new MsrpcSamrCloseHandle(this);
            this.handle.sendrecv(rpc);