return buf;
        }
    }
    static void getBuffers( SmbComTransaction req, SmbComTransactionResponse rsp ) {
        synchronized( cache ) {
            req.txn_buf = getBuffer();
            rsp.txn_buf = getBuffer();
        }
    }
    static public void releaseBuffer( byte[] buf ) {
        synchronized( cache ) {
            if (freeBuffers < MAX_BUFFERS) {

    /**
     * 
     * @return a buffer from the cache, or a new one
     */
    byte[] getBuffer ();


    /**
     * Return a buffer to the cache
     * 
     * @param buf
     */
    void releaseBuffer ( byte[] buf );