#!/bin/bash
# Sat Apr 16 09:39:35 EDT 2016
# Description : Check the uptime of the cable modem
# Version : 1.0
# Author : Vince Herried
# License : GPLv3

# Commands
CMD_GREP="/bin/grep"
CMD_AWK="/usr/bin/awk"
CMD_EXPR="/usr/bin/expr"
CMD_WGET="/usr/bin/wget"


SCRIPTNAME=$(basename $0)
# Version
VERSION="1.0"
# Plugin return codes
STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3

# Default options
HOSTNAME="192.168.100.1"
WARNING=0
CRITICAL=0
STATUS="Cable Modem Status"
OPERATIONAL="Operational"

print_version() {
  echo $SCRIPTNAME version $VERSION
  echo ""
  echo "The nagios plugins come with ABSOLUTELY NO WARRANTY."
  echo "You may redistribute copies of the plugins under the terms of the GNU General Public License v3."
}


# Option processing
print_usage() {
  echo "Usage: ./check_cableModem -H 192.168.100.1  -w 4 -c 1"
  echo "  $SCRIPTNAME -H ADDRESS"
  echo "  $SCRIPTNAME -w INTEGER"
  echo "  $SCRIPTNAME -c INTEGER"
  echo "  $SCRIPTNAME -h"
  echo "  $SCRIPTNAME -V"
}

print_help() {
  print_version
  echo ""
  print_usage
  echo ""
  echo "Check the days of uptime on a Surfboard cable modem"
  echo ""
  echo "-H ADDRESS"
  echo "   Name or IP address of cable modem (default: 192.168.100.1)"
  echo "-w INTEGER"
  echo "   Warning level for number of days up (default: 0)"
  echo "-c INTEGER"
  echo "   Critical level for number of days up (default: 0)" 
  echo "-h"
  echo "   Print this help screen"
  echo "-V"
  echo "   Print version and license information"
  echo ""
  echo ""
}


while getopts H:w:c:hV OPT
do
  case $OPT in
    H) HOSTNAME="$OPTARG" ;;
    w) WARNING=$OPTARG ;;
    c) CRITICAL=$OPTARG ;;
    h)
      print_help
      exit $STATE_UNKNOWN
      ;;
    V)
      print_version
      exit $STATE_UNKNOWN
      ;;
   esac
done

# Plugin processing

# does this look like the modem?

$CMD_WGET  --output-document=-   http://$HOSTNAME/indexData.htm 2>/dev/null | $CMD_GREP "$STATUS" >/dev/null 
RC=$?

if [ $RC -ne 0 ] ; then
	echo "This doesn't appear to be a valid cable modem page"
	echo "The first page of the web interface does not include the character string $STATUS"
	print_help
	exit $STATE_UNKNOWN
fi

# is the modem operational ?

$CMD_WGET  --output-document=-   http://$HOSTNAME/indexData.htm 2>/dev/null | $CMD_GREP "$OPERATIONAL" >/dev/null
RC=$?
if [ $RC -ne 0 ] ; then
	echo "The cable modem is not operational"
	exit $STATE_CRITICAL
fi


#get number of days uptime
DAYS=`$CMD_WGET  --output-document=-   http://$HOSTNAME/indexData.htm 2>/dev/null | $CMD_GREP days | $CMD_AWK '{ print $1 }' | $CMD_AWK -F ">" '{print $NF}'`



if  [ $WARNING != 0 ] || [ $CRITICAL != 0 ]; then
	if [ $DAYS -lt $CRITICAL ] && [ $CRITICAL != 0 ]; then
		STATE=$STATE_CRITICAL
	elif [ $DAYS -lt $WARNING ] && [  $WARNING != 0 ]; then
		STATE=$STATE_WARNING
	else
		STATE=$STATE_OK
	fi
else
       STATE=$STATE_OK
fi

DESCRIPTION="Cable modem uptime is $DAYS days"
echo $DESCRIPTION
exit $STATE