这段代码用来转发shadowbane的封包，用来作为一个代理，保存封包信息，方便对此进行协议分析-Simple SBProxyServer using select. evilight at gmail dot com this code will act as a proxy server for shadowbane client so you can get all pockets to analyze shadowbane login protocol

RADIUS is a C/S structure of the agreement, the client is NAS (Net Access Server first) server running RADIUS client software, any computer can become a RADIUS client. Authentication mechanism of RADIUS protocol, can use PAP, CHAP or Unix login authe