#!/bin/sh

. /lib/functions.sh
. /lib/network/utils.sh

NETCON=0
WANIP=0
LASTSTATUS=""
CURSTATUS=""

SLEEP_TIME=30

test_connection() {
	local addr="$1"
	local defroute="$(ip r | grep default | awk '{print$3}' | head -1)"
	local def6route="$(ip -f inet6 r | grep default | awk '{print$3}')"
	local ping6dev="$(ip -f inet6 r | grep default | awk '{print$5}')"

	if [ -n "$addr" ]; then
		ping -q -w 5 -c 1 $addr >/dev/null 2>&1 && return 0
	elif [ -n "$defroute" ]; then
		ping -q -w 5 -c 1 $defroute >/dev/null 2>&1 && return 0
		for nmsrv in $(grep nameserver /var/resolv.conf.auto | awk '{print$2}'); do
			ping -q -w 5 -c 1 $nmsrv >/dev/null 2>&1 && return 0
		done
	elif [ -n "$def6route" -a -n "$ping6dev" ]; then
		ndisc6 -w 5 -1 $def6route $ping6dev >/dev/null 2>&1 && return 0
	fi
	return 1
}

uplink_test() {
	uplink_phy_connected
	if [ $? -eq 0 ]; then
		ubus call led.wan set '{"state" : "ok"}' || ubus call led.broadband set '{"state" : "ok"}'
	else
		ubus call led.wan set '{"state" : "off"}' || ubus call led.broadband set '{"state" : "off"}'
	fi
}

internet_test() {
	local link dest

	dest="$(uci -q get diagnostics.@connectivity[0].destination)"

	test_connection $dest

	if [ "$?" -eq 0 ]; then
		NETCON=1
		ubus call led.internet  set '{"state" : "ok"}'
		echo "{ \"online\" : true }" > /tmp/internet_connection_status
	else
		NETCON=0
		ubus call led.internet  set '{"state" : "error"}'
		echo "{ \"online\" : false }" > /tmp/internet_connection_status
	fi
}

connectivity_test() {
	uplink_test

	internet_test

	if [ $NETCON -eq 1 ]; then
		CURSTATUS=1
		[ "$CURSTATUS" == "$LASTSTATUS" ] || ubus send internet '{"status" : "online"}'
		LASTSTATUS=1
	else
		CURSTATUS=0
		[ "$CURSTATUS" == "$LASTSTATUS" ] || ubus send internet '{"status" : "offline"}'
		LASTSTATUS=0
	fi
}

if [ "$1" == "once" ]; then
	connectivity_test
	exit 0
fi

while true; do
	connectivity_test
	sleep $SLEEP_TIME
done