本文件是用户空间程序的入口，使用select函数和定时器机制监测接收控制消息的socket和与内核通信的socket，并触发相应的处理函数来保证协议的正常，有序的运转。-This document is a user-space entry procedures, use the select function and the timer mechanism for monitoring and receiving control messages to communicate with the kernel socket and the socket, and trigger the appropriate processing function to ensure the normal protocol, orderly operation