系统采用客户端和服务器端开发模式。在客户端，设计两个进程P1和P2同时读取网卡上的数据，P1读取数据后，负责将TCP报文中的头部数据写入到Packet文件中，P2读取数据后，负责将UDP报文的头部同样写入到Packet文件中。(The system uses the client and server-side development mode. On the client side, we design two processes, P1 and P2, and read the data on the network card. After reading data, P1 is responsible for writing the header data in the TCP message to the Packet file. After P2 reads the data, it is responsible for writing the header of the UDP message to Packet file as well.)