#!/bin/sh

disabled=`uci get gluon-alt-esc-client.@client[0].disabled`

if [ ! "$disabled" = "0" ]; then
	ebtables-tiny -t nat -F ALT_ESC_STDGW
	exit 0
fi


get_gw_hosts() {
	for gw in `batctl gwl -n -H | sed "s/.* \(..:..:..:..:..:..\) (.*/\1/"`; do
		batctl tg -n -H | grep ".* ..:..:..:..:..:.. .* $gw"
	done | sed "s/^.* \(..:..:..:..:..:..\) .* ..:..:..:..:..:.. .*/\1/" | sort
}

gwhosts="`get_gw_hosts`"
gwhostssum="`echo "$gwhosts" | md5sum`"
oldgwhosts="`cat /var/run/gluon-alt-esc.hosts 2> /dev/null`"
oldgwhostssum="`cat /var/run/gluon-alt-esc.hosts.md5sum 2> /dev/null`"

if [ "$gwhostssum" = "$oldgwhostssum" ]; then
	echo "Stayed the same"
	exit 0
fi

ebtables-tiny -t nat -F ALT_ESC_STDGW

for host in $gwhosts; do
	ebtables-tiny -t nat -A ALT_ESC_STDGW -d "$host" -j ALT_ESC_DNAT
done

echo "$gwhosts" > /var/run/gluon-alt-esc.hosts
echo "$gwhostssum" > /var/run/gluon-alt-esc.hosts.md5sum