在pc上调试後运行这段代码，可监听到局域网内的信息流量和一些具体内容，短小精悍-debugging on the pc after running this code, can monitor LAN to the flow of information and specific content, short and pithy

网络流量监控 主要实现了在局域网中，使用路由器上网，能够把整个局域网的计算机的据包，截获然后转发，根据截获的数据包，来进行流量的监控。进一步能够实现对流量的控制-Network traffic monitoring mainly realized in the LAN, the Internet using a router, to the whole package, according to the computer local area network, intercept and the