#!/bin/bash
################################################################################

. /etc/grml/lsb-functions

if [ "$(id -ru)" -ne 0 ] ; then
  echo "Error: please run this script with uid 0 (root)." >&2
  exit 1
fi

einfon "Checking network status... "

STATUS="Offline"
EXIT_CODE=1

GW="$(route -n | awk '/^0\.0\.0\.0/{print $2}')"
GWDEV="$(route -n | awk '/^0\.0\.0\.0/{print $NF}')"
NMAP="$(nmap -sP --host_timeout 4000 --max_rtt_timeout 4000ms "$GW" 2>/dev/null)"

if [ $? -eq 0 ]; then
  if ! echo "$NMAP" | grep -q "0 hosts up" ; then
    STATUS="Online (${GWDEV})"
    EXIT_CODE=0
  fi
fi

printf "%s\n" "$STATUS"
eend $EXIT_CODE
exit $EXIT_CODE