return this.handle.getSessionKey();
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.dcerpc.DcerpcHandle#doSendReceiveFragment(byte[], int, int, byte[])
     */
    @Override
    protected int doSendReceiveFragment ( byte[] buf, int off, int length, byte[] inB ) throws IOException {
        if ( this.handle.isStale() ) {
            throw new IOException("DCERPC pipe is no longer open");

            NdrBuffer buf = encodeMessage(msg, out);
            int off = sendFragments(msg, out, buf);

            // last fragment gets written (possibly) using transact/call semantics
            int have = doSendReceiveFragment(out, off, msg.length, inB);

            if ( have != 0 ) {
                NdrBuffer hdrBuf = new NdrBuffer(inB, 0);
                setupReceivedFragment(hdrBuf);
                hdrBuf.setIndex(0);