#!/bin/sh
. /lib/functions.sh

intf=$1

get_ip_from_server() {
	serverip=$(uci -q get openmptcprouter.$1.ip)
	serverport=$(uci -q get openmptcprouter.$1.port)
	getip="$(curl -s -k -4 -m 2 --interface $intf https://$serverip:$serverport/clienthost)"
	[ -n "$getip" ] && getip=$(echo $getip | jsonfilter -e '@.client_host')
	if expr "$getip" : '[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*$' >/dev/null; then
		ip=$getip
		break
	fi
}

get_ip_from_website() {
	check_ipv4_website="$(uci -q get openmptcprouter.settings.check_ipv4_website)"
	[ -z "$check_ipv4_website" ] && check_ipv4_website="http://ip.openmptcprouter.com"
	checkip=$(echo $check_ipv4_website | sed -e 's/https:\/\///' -e 's/http:\/\///' | xargs dig +short A | tr -d "\n")
	ipset add ss_rules_dst_bypass_all $checkip > /dev/null 2>&1
	getip="$(curl -s -4 -m 2 --interface $intf $check_ipv4_website)"
	ipset del ss_rules_dst_bypass_all $checkip > /dev/null 2>&1
	if expr "$getip" : '[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*$' >/dev/null; then
		ip=$getip
		break
	fi
}

[ -z "$intf" ] && return
if [ -n "$(ip -4 a show dev $intf)" ]; then
	ip=""
	config_load openmptcprouter
	config_foreach get_ip_from_server server
	[ -z "$ip" ] && get_ip_from_website
	echo $ip
fi