[ "$INTERFACE" != "wan" ] && exit 0
[ -f /proc/net/ipv6_route ] && has_ipv6=1
case $ACTION in
        ifup)
		pr="`uci get freifunk-policyrouting.pr.enable`"
		fallback="`uci get freifunk-policyrouting.pr.fallback`"
		# check if ipv6 is enabled:

		if [ $pr = "1" ]; then
			logger -s -t policyrouting "Starting policy routing on $INTERFACE"

			# Setup new tables
			tables="/etc/iproute2/rt_tables"
			if [ -z "`grep "111" $tables`" ]; then
				echo "111 olsr" >> $tables
			fi
			if [ -z "`grep "112" $tables`" ]; then
				echo "112 olsr-default" >> $tables
			fi

			# Make sure Rt_tables in olsrd are in place
			if [ ! "`uci -q get olsrd.@olsrd[0].RtTable`" == "111" ] || [ ! "`uci -q get olsrd.@olsrd[0].RtTableDefault`" == "112" ]; then
				uci set olsrd.@olsrd[0].RtTable='111'
				uci set olsrd.@olsrd[0].RtTableDefault='112'
				uci commit
				/etc/init.d/olsrd restart
			fi

			# Disable dyn_gw and dyngw_plain
			dyngwlib=`uci show olsrd |grep dyn_gw.so |awk {' FS="."; print $1"."$2 '}`
			if [ -n "$dyngwlib" ]; then
				uci set $dyngwlib.ignore=1
				uci commit
			fi

			dyngwplainlib=`uci show olsrd |grep dyn_gw_plain |awk {' FS="."; print $1"."$2 '}`
			if [ -n "$dyngwplainlib" ]; then
				uci set $dyngwplainlib.ignore=1
				uci commit
			fi
	
			gw="$(ip r |grep default | cut -d " " -f 3)"
			# if no gateway was found stop now
			[ -z "$gw" ] && logger -s -t policyrouting "No gateway found" && exit 1
			
			device="`uci -q -p /var/state get network.wan.ifname`"
			[ -z "$device" ] && device="`uci -q -p /var/state get network.wan.device`"
			[ -z "$device" ] && logger -s -t policyrouting "No device found for wan." && exit 1

			test -n "`ip r s t default`" && ip r d default t default
			test -n "`ip r s |grep default`" && ip route del default
			ip route add default via $gw dev $device table default

			if [ "$has_ipv6" = 1 ]; then
				local ip6gw=$(ip -6 r |grep default |cut -d " " -f 3)
				test -n "`ip -6 r s t default`" && ip -6 r d default t default
				if [ -n "`ip -6 r s |grep default`" ]; then
					ip -6 route del default
					ip -6 r a $ip6gw via $ip6gw dev $dev table default
					ip -6 route add default via $ip6gw dev $device table default
				fi
			fi

			ip rule del lookup main
			ip rule add fwmark 1 lookup olsr-default
			ip rule add lookup main
			ip rule add lookup olsr
                        # Fallback via mesh if no ipv4 gateway is found in default table
			[ "$fallback" = 1 ] && ip rule add lookup olsr-default prio 32800

			if [ "$has_ipv6" = 1 ]; then
	                        ip -6 rule del lookup main
	                        ip -6 rule add lookup olsr prio 16380
	                        ip -6 rule add lookup main prio 16390
	                        ip -6 rule add fwmark 1 lookup olsr-default prio 16400
	                        ip -6 rule add lookup default prio 16410
	                        [ "$fallback" = 1 ] && ip -6 rule add lookup olsr-default prio 16420
			fi
		else
			# Remove custom routing tables from olsrd
			if [ "`uci -q get olsrd.@olsrd[0].RtTable`" == "111" ] || [ "`uci -q get olsrd.@olsrd[0].RtTableDefault`" == "112" ]; then
				uci delete olsrd.@olsrd[0].RtTable
				uci delete olsrd.@olsrd[0].RtTableDefault
				uci commit
				/etc/init.d/olsrd restart
			fi
		fi
	;;

	ifdown)
	logger -s -t policyrouting "Deleting ipv4 policy rules for $INTERFACE"
	ip rule del fwmark 1 lookup olsr-default > /dev/null 2>&1
	ip rule del lookup olsr-default > /dev/null 2>&1
	ip rule del lookup olsr	> /dev/null 2>&1
	if [ "$has_ipv6" = 1 ]; then
		logger -s -t policyrouting "Deleting ipv4 policy rules for $INTERFACE"
		ip -6 rule del fwmark 1 lookup olsr-default > /dev/null 2>&1
		ip -6 rule del lookup olsr-default > /dev/null 2>&1
		ip -6 rule del lookup olsr > /dev/null 2>&1
                ip -6 rule del lookup default  > /dev/null 2>&1
	fi
	;;
esac