Mirror from https://gitcafe.com/muxueqz/sh_wifihotspot . sh_wifihotspot a simple way to open a free hotspot[captive/open/active] portal. providing restricted access to an Internet connection. It is intended for use on wireless access points running OpenWrt (but may also work on other Linux-based devices). 其它的类似项目太复杂啦，折腾两天没搞定，自己搞了个。