Finds an available IP address by scanning current records

ipscan.sh

#!/bin/bash

firstOctetinRange=9
secondOctet=253
foundIP=0
        for i in $ovpn_ip
        do
                ovpn_octet=$(echo $i | cut -f 4 -d .)
                if [[ 10.${secondOctet}.0.${ovpn_octet} = 10.${secondOctet}.0.${firstOctetinRange} && $foundIP = 0 ]]; then
                        echo "$i is taken, trying the next IP"
                        firstOctetinRange=$(($firstOctetinRange + 1))
                        if [[ ${firstOctetinRange} -gt 254 ]]; then
                                echo "ERROR: Octet has reached the end of the network (253)"
                                exit 1
                        fi
                        if [[ ${ovpn_ip[*]} != 10.${secondOctet}.0.${firstOctetinRange} ]]; then
                                echo "Using 10.${secondOctet}.0.${firstOctetinRange}"
                                newOpenVPNIP="10.${secondOctet}.0.${firstOctetinRange}"
                        fi
                fi
        done