workaround for openwrt/openwrt#6110

fix_dfs_nat.fs

#!/bin/sh

# for some reason DFS swaps disable these which breaks loopback nat
# https://github.com/openwrt/openwrt/issues/6110
# this works around it by checking them every 2 minutes and setting them back if they change

PORT=/sys/devices/virtual/net/br-lan/lower_wlan0

while true
do
	hairpin=$(cat $PORT/brport/hairpin_mode)
	multicast_to_unicast=$(cat $PORT/brport/multicast_to_unicast)
	if [[ "$hairpin" == 0 ]]; then
		echo "1" > $PORT/brport/hairpin_mode
	fi
        if [[ "$multicast_to_unicast" == 0 ]]; then
                echo "1" > $PORT/brport/multicast_to_unicast
        fi
	sleep 120
done