req.maxBufferSize = snd_buf_size;
                resp.reset();

                try {
                    BufferCache.getBuffers(req, resp);

                    /*
                     * First request w/ interim response
                     */

                    req.nextElement();
                    if (req.hasMoreElements()) {

        RdmaMemoryRegion sendRegion = bufferManager.getSendRegion(requestBuffer.remaining());
        sendRegion.getBuffer().put(requestBuffer);
        sendRegion.getBuffer().flip();
        
        try {
            // Send via RDMA
            rdmaConnection.send(sendRegion.getBuffer(), sendRegion);
            rdmaConnection.consumeSendCredit();
            
            // Receive response

            // Test data preparation
            byte[] testData = "Test RDMA data transfer".getBytes();
            sendBuffer.getBuffer().put(testData);
            sendBuffer.getBuffer().flip();
            assertEquals(testData.length, sendBuffer.getBuffer().remaining(), "Buffer should contain test data");

            // Clean up
            bufferManager.releaseSendRegion(sendBuffer);

        if (this.state == 0) {
            bind();
        }
        final byte[] inB = this.transportContext.getBufferCache().getBuffer();
        final byte[] out = this.transportContext.getBufferCache().getBuffer();
        try {
            final NdrBuffer buf = encodeMessage(msg, out);
            final int off = sendFragments(msg, out, buf);

                        // Test allocation performance
                        long allocStart = System.nanoTime();
                        byte[] buffer = BufferCache.getBuffer();
                        long allocEnd = System.nanoTime();
                        totalAllocTime.addAndGet(allocEnd - allocStart);
                        allocations.incrementAndGet();

        boolean isDirect;
        DcerpcException de;

        if (state == 0) {
            bind();
        }

        isDirect = true;

        stub = jcifs.smb1.smb1.BufferCache.getBuffer();
        try {
            int off, tot, n;

            buf = new NdrBuffer(stub, 0);

            msg.flags = DCERPC_FIRST_FRAG | DCERPC_LAST_FRAG;
            msg.call_id = call_id++;

    public int getTailSpace() {
        return buf.length - index;
    }

    /**
     * Returns the underlying byte buffer.
     *
     * @return the byte buffer
     */
    public byte[] getBuffer() {
        return buf;
    }

    /**
     * Aligns the buffer index to the specified boundary with a fill value.
     *
     * @param boundary the alignment boundary

        lenient().when(mockContext.getBufferCache()).thenReturn(mockBufferCache);

        // Setup buffer cache to return buffers for sendrecv operations
        lenient().when(mockBufferCache.getBuffer()).thenReturn(new byte[8192]);
    }

    /**
     * Helper method to create a DcerpcPipeHandle with injected mocks
     * Uses mock to avoid constructor issues while allowing real method calls
     */

            // In real implementation, this would receive using DiSNI:
            // RdmaCompletionEvent event = endpoint.getCqProcessor().getCqEvent(timeout);
            // if (event != null) {
            //     return event.getBuffer();
            // }
            // return null;

            // For skeleton implementation, return null (timeout)
            return null;

        } catch (Exception e) {

    public int getTailSpace() {
        return this.buf.length - this.index;
    }

    /**
     * Returns the underlying byte buffer.
     *
     * @return the byte buffer
     */
    public byte[] getBuffer() {
        return this.buf;
    }

    /**
     * Aligns the buffer index to the specified boundary with a fill value.
     *
     * @param boundary the alignment boundary