limit.sh

#!/bin/sh
macs="30:24:32:a9:f8:49 e0:2c:b2:57:45:64"
max="104857600"

for mac in $macs; do
    datused=$(nlbw -c csv -g ip,mac | grep "\"$mac"\" | awk '{s+=$4 + S6} END {print s}')
    #datused=$(cat /home/Jo/sample2.csv | grep "\"$mac"\" | awk '{s+=$4 + S6} END {print s}')
    echo $mac $datused
    ip=$(nlbw -c csv -g mac,ip | grep "\"$mac\"" | awk '{print $2}' | tr -d \")
    if [ -z "$ip" ]; then
        echo "No traffic for $mac"
        continue
    fi
    if [[ "$datused" -gt "$max" ]]; then
        echo "limit reached $ip $mac"
        if ! iptables -vnL FORWARD | grep "$ip" > /dev/null; then
            echo "Adding filter"
            iptables -I FORWARD -s "$ip" -j DROP
        fi
    else
        echo "limit not reached $ip $mac"
        if iptables -vnL FORWARD | grep "$ip" > /dev/null; then
            echo "Removing filter"
            iptables -D FORWARD -s "$ip" -j DROP
        fi
    fi
done