接收4个IOCTL设备控制代码，作用分别是开始过滤、停止过滤、添加过滤规则和清除过滤规则。其中每一个过滤规则由一个自定义的CIPFilter结构描述，指定了如何对待特定的IP封包。过滤钩子处理封包时，要比较每个用户添加的规则，然后采取相应的行动。-4 receive IOCTL device control code, the role is the beginning of filtration, filtering to stop, add the filter rules and clea

THIS THE SKELETON CODE FOR KERNEL TIMER IN LINUX-THIS IS THE SKELETON CODE FOR KERNEL TIMER IN LINUX

unix 下网络编程，完成端口模式的网络编程源代码-a unix network programming, network programming completion port model source code