一个简单的windows环境下SOCK5代理服务器的实现，可以方便的移植到其他应用中。-a simple windows environment SOCK5 achieve the proxy server can be easily transplanted to other applications.

用状态机来写一个socks5代理服务器，为了移植性和很多新手都在用windows，异步驱动我就只用select而没用epoll。-I have written a Proxy Socks5 server by using finite-state machine. Because of the so many people are studying under Windows, I just implement it by select not by epoll.