android-dynv6.sh

#!/bin/sh -e

PATH=$PATH:/usr/sbin:/usr/bin

hostname=somehost@v6.army
device=$2
token=blahblah
file=/tmp/.dynv6.addr6
bind_ip=192.0.0.1

update4="http://ipv4.dynv6.com/api/update?hostname=$hostname&ipv4=auto&token=$token"
update6="http://dynv6.com/api/update?hostname=$hostname&ipv6=auto&token=$token"

[ -e $file ] && old=`cat $file`

if [ -z "$hostname" -o -z "$token" ]; then

  echo "Usage: token=<your-authentication-token> [netmask=64] $0 your-name.dynv6.net [device]"
  exit 1

fi

if [ -z "$netmask" ]; then

  netmask=128

fi

if [ -z "$device" ]; then

  if ifconfig rmnet_data0 |grep -q -w "inet"; then
    interface=rmnet_data0
  elif ifconfig rmnet_data1 |grep -q -w "inet"; then
    interface=rmnet_data1
  elif ifconfig rmnet_data2 |grep -q -w "inet"; then
    interface=rmnet_data2
  elif ifconfig rmnet_data3 |grep -q -w "inet"; then
    interface=rmnet_data3
  fi

fi

if [ -n "$device" ]; then

  device="dev $device"

fi

echo
echo $interface
echo

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

echo $address
echo

#cat $file || true

#exit

if [ -e /usr/bin/wget ]; then
  bin="wget -O-"
else
  echo "wget not found"
  exit 1
fi

if [ -z "$address" ]; then

  echo "no IPv6 address found"
  exit 1

fi

# address with netmask

dns_addr=$(nslookup hd1905.v6.army |grep Address |tail -n1 | cut -d ' ' -f2)

echo $dns_addr
echo

#echo $current

#echo $address

if [ "$address" != "$dns_addr" ]; then

  echo "IPv6 address changed"
  #exit

  # send addresses

  if $bin "http://dynv6.com/api/update?hostname=$hostname&ipv6=$address&token=$token"; then

# save current address
   echo $current > $file

  fi

fi