. /etc/utils.sh

iface=$1

start_dhcp() {
  echo "Starting DHCP on $iface"
  lock=/var/run/dhclient.${iface}.lock
  lockfile-create $lock
  pidfile=/var/run/dhclient6.${iface}.pid
  if [ -e $pidfile ]; then
    kill $(cat $pidfile) 2>&1 > /dev/null
    rm -f $pidfile
  fi
  babysit 60 /usr/sbin/dhclient $iface -6 \
    -d \
    -pf $pidfile \
    -lf /var/run/dhclient6.${iface}.lease \
    -cf /etc/dhclient6.conf \
    --never-gonna-give-you-up 900 2>&1 | logos dhclient6 &
  lockfile-remove $lock
}

ip link set dev $iface up
if [ $(cat /etc/config/wanport) = $iface ]; then
  # start dhcp if no management vlan is assigned.
  if [ -z "$(cat /etc/config/mgmtvlan)" ]; then
    start_dhcp
  fi
elif [ "man" = "$iface" ]; then
  start_dhcp
fi