ngrep strives to provide most of GNU grep s common features, applying them to the network layer. ngrep is a pcap-aware tool that will allow you to specify extended regular or hexadecimal expressions to match against data payloads of packets. It curre

client创建udp原始套接字，将数据存入buf中，进行网络的捕包，从中过滤识别出80端口的包，打印出五元组的信息。server端开启守护进程，接受前端发送的信息，并将其保存到文件中。-create udp raw socket client, the data stored in buf, make the network packet capture, filter identified 80 ports from which the package, print out the five