return this.handle.getSessionKey();
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.dcerpc.DcerpcHandle#doSendReceiveFragment(byte[], int, int, byte[])
     */
    @Override
    protected int doSendReceiveFragment(final byte[] buf, final int off, final int length, final byte[] inB) throws IOException {
        if (this.handle.isStale()) {