#!/bin/bash
LFILE="/var/lib/dhcp/dhcpd.leases"
TMPFILE="/tmp/dhcp-statuscount.txt"

declare -A StateArray

awk '/lease|^ *binding state|hardware|starts|! next/ { printf "%s", $0 } /\}/ {print "\n"}' ${LFILE}| tr -d \; | grep \: > ${TMPFILE}

while read a b c d e f g h i state j k hwa rest
do
 StateArray[${hwa}]="${state}"
done < "${TMPFILE}"

Active=0
for Address in ${!StateArray[*]}
do
 if [ "${StateArray[${Address}]}" = "active" ] ; then Active=$(( ${Active} + 1 )) ; fi
done

echo $Active