nagios check script - openwrt mwan3 status

check_mwan3

#/bin/ash

. /lib/functions.sh                                                             
. /lib/functions/network.sh                                                     
. /lib/mwan3/mwan3.sh

mwan3_iface_status()
{
	local device result track_ips tracking IP IPT

	mwan3_get_iface_id id $1
	network_get_device device $1
	config_get enabled "$1" enabled 0
	config_get family "$1" family ipv4

	if [ "$family" == "ipv4" ]; then
		IP="$IP4"
		IPT="$IPT4"
	fi

	if [ "$family" == "ipv6" ]; then
		IP="$IP6"
		IPT="$IPT6"
	fi

	if [ -z "$id" -o -z "$device" ]; then
		result="unknown"
		istate=0
	elif [ -n "$($IP rule | awk '$1 == "'$(($id+1000)):'"')"i -a -n "$($IP rule | awk '$1 == "'$(($id+2000)):'"')" -a -n "$($IPT -S mwan3_iface_in_$1 2> /dev/null)" -a -n "$($IPT -S mwan3_iface_out_$1 2> /dev/null)" -a -n "$($IP route list table $id default dev $device 2> /dev/null)" ]; then
		result="online"
		istate=1
	elif [ -n "$($IP rule | awk '$1 == "'$(($id+1000)):'"')" -o -n "$($IP rule | awk '$1 == "'$(($id+2000)):'"')" -o -n "$($IPT -S mwan3_iface_in_$1 2> /dev/null)" -o -n "$($IPT -S mwan3_iface_out_$1 2> /dev/null)" -o -n "$($IP route list table $id default dev $device 2> /dev/null)" ]; then
		result="error"
		istate=0
	else
		if [ "$enabled" == "1" ]; then
			result="offline"
			istate=0
		else
			result="disabled"
			istate=0
		fi
	fi

	mwan3_list_track_ips()
	{
		track_ips="$1 $track_ips"
	}
	config_list_foreach $1 track_ip mwan3_list_track_ips

	if [ -n "$track_ips" ]; then
		if [ -n "$(ps -w | grep mwan3track | grep -v grep | sed '/.*\/usr\/sbin\/mwan3track \([^ ]*\) .*$/!d;s//\1/' | awk '$1 == "'$1'"')" ]; then
			tracking="active"
			tstate=1
		else
			tracking="down"
			tstate=0
		fi
	else
		tracking="not enabled"
	fi

	out="$out$1 $result tracking $tracking, "
	allup=$((allup && istate))
	alldown=$((alldown && istate^1))
}

allup=1
alldown=1
out=""

config_load mwan3  
interfaces=`config_foreach echo interface`

for interface in $interfaces; do
	mwan3_iface_status $interface
done

if [ $allup -eq 1 ]; then
	echo "OK - $out"
	result=0
elif [ $alldown -eq 1 ]; then
	echo "ERROR - $out"
	result=2
else
	echo "WARN - $out"
	result=1
fi
exit $result