#!/bin/sh
iface=$1

lock=/var/run/dhclient.$iface.lock
lockfile-create --use-pid $lock

run_dhclient() {
  local suffix="$1" xargs="$2"
  local pidfile="/var/run/dhclient$suffix.$iface.pid"
  local leasefile="/var/run/dhclient$suffix.$iface.lease"
  local conffile="/etc/dhclient$suffix.conf"

  # kill any existing babysitters and dhclients
  # [-] is a trick to not match the pkill itself
  pkill -f "(babysit|dhclient).*[-]pf $pidfile "

  babysit 60 dhclient "$iface" $xargs \
      -d \
      -pf "$pidfile" \
      -lf "$leasefile" \
      -cf "$conffile" \
      2>&1 | logos "dhclient$suffix.$iface" &
}

run_dhclient "" ""

# -N -P means to request a delegated prefix AND get a address.
# -S means runs stateless config, requests only the extra information.
# On the network box we only run the stateful version, running both
# interfere with each other.
if is-network-box; then
  # stateful + prefix delegation
  run_dhclient "6" "-N -P -6 --never-gonna-give-you-up 900"
elif is-ptp || is-fiberjack; then
  # TODO(edjames): unfork /etc/config/ifup.default and use this for FJ
  # stateful
  run_dhclient "6" "-6 --never-gonna-give-you-up 900"
else
  # stateless + slaac
  run_dhclient "6" "-S -6 --never-gonna-give-you-up 900"
fi

lockfile-remove $lock