静态防火墙代码的基础上在SDN天花控制

代码说明：

这是一个静态的防火墙代码用Python编写，并运行在SDN天花控制器。您需要添加要在黑名单来阻止主机。this is a static firewall code written in python, and was ran in pox controller in SDN. you need to add the host which you want to block in the blacklist.