#!/bin/sh

client="zodac_keller"

data4=$(curl -4 -s "http://ip.codevoid.de/?client=$client")
ip4=$(echo "$data4" | cut -d" " -f1)

data6=$(curl -6 -s "http://ip.codevoid.de/?client=$client")
ip6=$(echo "$data4" | cut -d" " -f1)

echo "$data4" | fgrep -q "(changed)" \
    && changed=4

echo "$data6" | fgrep -q "(changed)" \
    && changed="${changed}6"

case $changed in
    "4") echo "update with v4 addr $ip4"; ;;
    "6") echo "update with v6 addr $ip6"; ;;
    "46") echo "update with v4 addr $ip4 and v6 addr $ip6"; ;;
esac