我是这么判断 osip 的

[crazypeace]

osip=$(curl -4s --connect-timeout 3 https://www.cloudflare.com/cdn-cgi/trace | grep ip= | sed -e "s/ip=//g")
if [[ -z $osip ]]; then
	osip=$(curl -6s https://www.cloudflare.com/cdn-cgi/trace | grep ip= | sed -e "s/ip=//g")
fi

https://github.com/crazypeace/ccaa