设计并实现程序，捕获网络上的相关数据包（TCP、UDP），并分析这些数据包应用的协议、网络地址、端口号、数据包长度、协议头部信息等内容。

用命令行执行，显示相关结果并将数据写入日志文件。如运行Sniffer logfile；其中Sniffer是程序名，logfile表示捕获结果写入的日志文件名。或在此基础上用图形化界面实现上述功能。

-Design and implement procedures to capture relevant data on the network packet (TCP, UDP), and analyze the application of these packets protocol, network address, port number, packet length, protocol header information and so on. The command line in order to demonstrate the relevant results and write data to the log file. Such as running Sniffer logfile　where Sniffer is a program name, logfile that capture the results of the log file name to write. On this basis, or the graphical interface used to achieve the above functions.