利用封装 Winodws Filtering Platform 的WinDivert 库, clumsy 能实时的将系统接收和发出的网络数据包拦截下来，人工的造成延迟，掉包和篡改操作后再进行发送。无论你是要重现网络异常造成的程序错误，还是评估你的应用程序在不良网络状况下的表现，clumsy 都能让你在不需要额外添加代码的情况下，在系统层次帮你达到想要的效果(Using Winodws Filtering Platform package WinDivert library, clumsy can real-time system receives and sends the network data packets intercepted, delay caused by artificial, substitution and tampering after sending operation. Whether you want to reproduce the program errors caused by network exceptions or evaluate the performance of your applications under bad network conditions, clumsy can help you achieve the desired results at the system level without additional code.)