he.net ddns

ddns_he.net.sh

#!/bin/bash
token="token"
hostname="exmple.example.com"

device="eth0"
file=$HOME/.iphistory_henet
[ -e $file ] && old=`cat $file`


if [ -z "$netmask" ]; then
  netmask=128
fi

if [ -n "$device" ]; then
  device="dev $device"
fi
address=$(ip -6 addr list scope global $device | grep -v " fd" | sed -n 's/.*inet6 \([0-9a-f:]\+\).*/\1/p' | head -n 1)

if [ -z "$address" ]; then
  echo "no IPv6 address found"
  exit 1
fi

# address with netmask
current=$address/$netmask

if [ "$old" = "$current" ]; then
  echo "IPv6 address unchanged"
  exit
fi

# send addresses to dynv6
result=$(curl "https://dyn.dns.he.net/nic/update" -d "hostname=$hostname1" -d "password=$token" -d "myip=$current")
if [ "$?" != "0" ]; then
  exit
fi
result=$(echo "$result" | grep -c bad)
if [ "$result" != "0" ]; then
  exit
fi

# save current address
echo $current > $file