主要用来捕获数据包，并分析各层协议信息并打印输出,其中链路层是通过winpcap实现捕获的，网络层是通过原始套接字实现的，有些功能没做好，还得大家一起研究。-Mainly used to capture packets and analyze the layers of protocol information and printed output, which implement the link layer is captured by winpcap, network layer is a