#!/bin/sh

# Copyright 2018 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Set the ARP gateway.

FLAGS_HELP="Usage:
  $(basename "$0")
  $(basename "$0") [true | false]

Turn on extra network state checking to make sure the default gateway
is reachable.
"

FLIMFLAM=org.chromium.flimflam
IMANAGER=$FLIMFLAM.Manager

usage() {
  echo "$*"
  echo
  echo "${FLAGS_HELP}"
  exit 1
}

dbus () {
  local obj=$1
  local meth=$2
  shift 2

  dbus-send --system --print-reply --fixed --dest=$FLIMFLAM "$obj" "$meth" "$@"
}

get_manager () {
  dbus / $IMANAGER.GetProperties | sed -n "/$1/s/.* //p"
}

display_arpgw () {
  local arpgw

  arpgw="$(get_manager ArpGateway)"
  if [ -n "${arpgw}" ]; then
    echo "Current Gateway ARP setting: ${arpgw}"
    exit 0
  fi

  echo "This Flimflam instance does not support ArpGateway"
  exit 0
}

if [ $# -lt 1 ]; then
    display_arpgw
fi

set_arpgw="$1"

if [ "${set_arpgw}" != false ] && [ "${set_arpgw}" != true ]; then
    usage "Argument must be 'true' or 'false'"
fi

dbus / $IMANAGER.SetProperty string:"ArpGateway" variant:boolean:"${set_arpgw}"