setup_hotspot_watchping() {
    ifname="client-wwan"
    gw=$(ip r show default dev $ifname | while read default via ip rest; do [[ $via == "via" ]] && echo $ip && break; done)
    if [ -n gw ]; then
        uci set system.hotspot_watchping=watchping
        uci set system.hotspot_watchping.interface=$ifname
        uci set system.hotspot_watchping.timeout=2m
        uci set system.hotspot_watchping.pinghosts=$gw
        uci set system.hotspot_watchping.pinginterval=20s
        uci commit system
        /etc/init.d/watchping restart
    fi
}

case "$1" in
	renew|bound)
		setup_hotspot_watchping
	;;
esac