Wifi Dog 认证原理和流程

WifiDOG是一个热点系统，包含了认证服务器和客户端两部分组成，认证原理大体说下：

General Flow Description:

一般流程描述：

①The client does his initial request, as if he was already connected, (e.g.: )

客户端发出初始化请求，比如访问  这个站点

②The Gateway's firewall rules mangle the request to redirect it to a local port on the Gateway. When that's the done, the Gateway provides an HTTP Redirect reply that contains the Gateway ID, Gateway FQDN and other informations

网关的防火墙规则将这个请求重定向到本地网关的端口上。当做完这个工作，网关提供一个HTTP重定向回复，包含了Gateway的ID，Gateway的FQDN以及其他的信息。

③The Client does his request to the Auth Server as specified by the Gateway, see Login Protocol

用户向认证服务器发出认证请求

gw_id=[GatewayID, default: "default"]
gw_address=[GatewayAddress, internal IP of router]
gw_port=[GatewayPort, port that wifidog Gateway is listening on]
url=[user requested url]

④The Gateway replies with a (potentially custom) splash (login) page

网关返回一个（可以是自定义的）splash（也称作“登录”）页面

⑤The Client provides his identification informations (username and password)

用户提供他的凭据信息，比如用户名和密码

⑥Upon succesful authentication, the client gets an HTTP Redirect to the Gateway's own web server with his authentication proof (a one-time token),  [auth token]

成功认证的话，客户端将会被重定向到网关的自己的web页面上，并且带有一个 认证凭据（一个一次性的token），内容比如

[auth token]

⑦The Client then connects to the Gateway and thus gives it his token

用户就是用获取到的凭据访问网关

⑧The Gateway requests validation of the token from the Auth Server, see Client Protocol【见登录心跳】

网关去认证服务器询问token的有效性

⑨The Auth Server confirms the token

认证服务器确认token的有效性

①①The Gateway then sends a redirect to the Client to obtain the Success Page from the Auth Server, redirects to 

网关发送重定向给客户端，以从认证服务器上获取 成功提示页面，重定向到  这个位置

①②The Auth Server notifies the Client that his request was successful

认证服务器通知客户请求成功，可以上网了



这个是原理图，大概需要11步才能完成认证，这种token认证方式有个好处，可以第三方认证后然后到wifidog的认证服务器取一个有效的token给用户，实现与第三方认证的整合。