ptrstream/madness

#!/bin/bash

TIMEOUT=2

genip() {
    num_octets=$((RANDOM % 4 + 1))
    ip=""
    for i in $(seq 1 $num_octets); do
        if [ $i -ne 1 ]; then
            ip+="."
        fi
        ip+=$((RANDOM % 256))
    done
    echo $ip
}

TEMP=$(mktemp -d)
while true; do
    ip=$(genip)
    ns_records=$(dig +time=$TIMEOUT +short $ip.in-addr.arpa NS)
    for ns in $ns_records; do
        ns_ips=$(dig +time=$TIMEOUT +short $ns A $ns AAAA)
        for ns_ip in $ns_ips; do
            #echo -e "AXFR on \033[36m${ns%.}\033[0m \033[90m($ns_ip)\033[0m for \033[33m$ip.in-addr.arpa\033[0m"
            dig AXFR @$ns_ip $ip.in-addr.arpa > $TEMP/$ip.in-addr.arpa.txt
            if [ ! -s "$zone_file" ] || grep -qE "Transfer failed|connection reset|connection refused" "$zone_file"; then
                echo -e "\033[31m[FAIL]\033[0m AXFR on \033[36m${ns%.}\033[0m \033[90m($ns_ip)\033[0m for \033[33m$ip.in-addr.arpa\033[0m"
                rm -f "$zone_file"
            else
                echo -e "\033[32m[SUCCESS]\033[0m AXFR on \033[36m${ns%.}\033[0m \033[90m($ns_ip)\033[0m for \033[33m$ip.in-addr.arpa\033[0m"
                break
            fi
        done
    done
done