* "NBSS Continuation Message" frame according to WireShark
             */
            out.write( BUF, 0, 4 + n );
        }
    }
    protected void doSend0( Request request ) throws IOException {
        try {
            doSend( request );
        } catch( IOException ioe ) {
            if (log.level > 2)
                ioe.printStackTrace( log );
            try {
                disconnect( true );

                }
                return true;
            }
        }
        return false;
    }


    protected void doSend0 ( Request request ) throws IOException {
        try {
            doSend(request);
        }
        catch ( IOException ioe ) {
            log.warn("send failed", ioe);
            try {
                disconnect(true);
            }

    protected HashMap response_map = new HashMap( 4 );

    protected abstract void makeKey( Request request ) throws IOException;
    protected abstract Request peekKey() throws IOException;
    protected abstract void doSend( Request request ) throws IOException;
    protected abstract void doRecv( Response response ) throws IOException;
    protected abstract void doSkip() throws IOException;

    public synchronized void sendrecv( Request request,

     * @param timeout
     * @return
     * @throws IOException
     */
    protected <T extends Response> long doSend ( Request request, T response, Set<RequestParam> params, long timeout ) throws IOException {
        long firstKey = prepareRequests(request, response, params, timeout);
        doSend(request);
        return firstKey;
    }


    /**
     * @param request
     * @param response