throw new IOException("Connection not established");
        }

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

        }
    }
    
    @Override
    public ByteBuffer receive(int timeout) throws IOException {
        try {
            RdmaCompletionEvent event = endpoint.getCqProcessor().getCqEvent(timeout);
            if (event != null) {
                return event.getBuffer();
            }
            return null;
        } catch (Exception e) {