#!/bin/bash
# OpenMPTCProuter VPS service script

_multipath() {
	# Force multipath status
	source /etc/shorewall/params.net
	for intf in `ls -1 /sys/class/net`; do
		if [ "$intf" = "$NET_IFACE" ]; then
			[ "$(multipath $intf | tr -d '\n')" != "$intf is in default mode" ] && multipath $intf on
		else
			[ "$(multipath $intf | tr -d '\n')" != "$intf is deactivated" ] && multipath $intf off
		fi
	done
}

_glorytun_udp() {
	[ -z "$(glorytun show dev gt-udp-tun0 2>/dev/null | grep tunnel)" ] && {
		logger -t "OMR-Service" "Restart Glorytun-UDP"
		systemctl -q restart 'glorytun-udp@*'
	}
	for intf in /etc/glorytun-udp/tun*; do
		[ "$(echo $intf | grep key)" = "" ] && /etc/glorytun-udp/post.sh ${intf}
	done
}

_glorytun_tcp() {
	for intf in /etc/glorytun-tcp/tun*; do
		[ "$(echo $intf | grep key)" = "" ] && /etc/glorytun-tcp/post.sh ${intf}
	done
	if [ "$(cat /etc/openmptcprouter-vps-admin/current-vpn)" = "glorytun_tcp" ]; then
		if [ "$(ping -c 5 -w 5 10.255.255.2 | grep '100%')" != "" ]; then
			logger -t "OMR-Service" "No answer from VPN client end, restart Glorytun-TCP"
			systemctl restart glorytun-tcp@tun0
		fi
	fi
}

_omr_api() {
	[ -z "$(curl -s -k -m 30 https://127.0.0.1:65500/)" ] && {
		logger -t "OMR-Service" "Restart OMR-Admin"
		systemctl -q restart omr-admin
	}
}

_lan_route() {
	cat /etc/openmptcprouter-vps-admin/omr-admin-config.json | jq -c '.users[0][]' |
	while IFS=$"\n" read -r c; do
		vpnremoteip=$(echo "$c" | jq -r '.vpnremoteip')
		if [ -n "$vpnremoteip" ] && [ "$vpnremoteip" != "null" ]; then
			echo "$c" | jq -c '.lanips //empty' | 
			while IFS=$"\n" read -r d; do
				network=$(ipcalc -n $d | grep Network | awk '{print $2}')
				[ -n "$network" ] && [ -z "$(ip r show $network via $vpnremoteip)" ] && ip r replace $network via $vpnremoteip 2>&1 >/dev/null
			done
		fi
	done
}

_gre_tunnels() {
	. "$(readlink -f "/etc/shorewall/params.vpn")"
	for intf in /etc/openmptcprouter-vps-admin/intf/*; do
		if [ -f "$intf" ]; then
			. "$(readlink -f "$intf")"
			iface="$(basename $intf)"
			if [ "$(ip tunnel show $iface 2>/dev/null | awk '{print $4}')" != "$REMOTEIP" ]; then
				ip tunnel del $iface 2>&1 >/dev/null
				ip tunnel add $iface mode gre local $INTFADDR remote $REMOTEIP
				ip link set $iface up
				ip addr add $LOCALIP dev $iface
				ip route add $NETWORK dev $iface 2>&1 >/dev/null
			fi
		fi
	done
}


while true; do
	_glorytun_udp
	_glorytun_tcp
	_multipath
	_omr_api
	_lan_route
	_gre_tunnels
	sleep 10
done