只要是想学习防火墙编写方法的同志们都可以从这
套代码中有所获，其中包含防火墙截包的各种常用
方法的代码：从用户层的Windows SPI,Windows API到内核层的TDI、NDIS等都包含，另外还有用C++生成DLL文件的代码。(Comrades who want to learn how to write firewalls can do so.

Set of code has been obtained, which contains all kinds of commonly used firewall packets.

Method code: from user layer Windows SPI, Windows API to kernel layer TDI, NDIS and so on, it also contains C++ code to generate DLL files.)