Mark Dalby

#!/bin/bash

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# Update the HE (Hurricane Electric) ipv6-tunnel

#######################################################################

# Interface to use: en1 = Airport, en0 = Ethernet

MYIF=”en1″

# leave as is

IPCACHE=”/Library/Caches/ipv6scriptIP”

HEUSER=3da0676a512baf3294f7eb923f115bea

HEPASS=1eb2c32ab1c2616725fadab3554e0c5b

HETUNNEL=81743

HETUNEND=216.66.80.26

HEYOUR6END=2001:470:1f08:1062::2

HETHEIR6END=2001:470:1f08:1062::1

HEPREFIX=64

HEMY64IP=2001:470:1f08:1062::3

#######################################################################

# Config end

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# sometimes this script will get executed twice at the same time, not good, so:

if [ -f $IPCACHE.lock ] ; then

echo A copy already running!

exit 0

else

touch $IPCACHE.lock

fi

# This is faster if your router sets a dyndns entry:

#NEW_IP=`dig mycomp.myvnc.com|grep “^mycomp”| grep -Eo “\<[[:digit:]]{1,3}(\.[[:digit:]]{1,3}){3}\>”`

NEW_IP=`curl -s “http://www.networksecuritytoolkit.org/nst/cgi-bin/ip.cgi”`

# Wait for the network…

while [ ! -n "$NEW_IP" ]

do

sleep 10

#NEW_IP=`dig mycomp.myvnc.com|grep “^mycomp”| grep -Eo “\<[[:digit:]]{1,3}(\.[[:digit:]]{1,3}){3}\>”`

NEW_IP=`curl -s “http://www.networksecuritytoolkit.org/nst/cgi-bin/ip.cgi”`

done

OLD_IP=`cat $IPCACHE`

if [ "$NEW_IP" = "$OLD_IP" ] ; then

CURCONF=`ifconfig |grep $HETUNEND`

if [ -n "$CURCONF" ] ; then

echo Nothing to do

rm $IPCACHE.lock

exit 0

fi

fi

echo -n $NEW_IP > $IPCACHE

# if you need to use your public ip address, use LOCAL_IP=$NEW_IP instead

LOCAL_IP=`ifconfig $MYIF |grep -E ‘inet.[0-9]‘ | grep -v ’127.0.0.1′ | awk ‘{ print $2}’`

# let’s delete a pre-existing gif0, ignore any errors

ifconfig gif0 deletetunnel

ifconfig gif0 down

ifconfig gif0 inet6 delete $HEYOUR6END

ifconfig gif0 inet6 delete $HEMY64IP

route delete -inet6 default -interface gif0

# update the tunnel

curl -k -s “https://ipv4.tunnelbroker.net/ipv4_end.php?ipv4b=$NEW_IP&pass=$HEPASS&user_id=$HEUSER&tunnel_id=$HETUNNEL”

echo ” “

sleep 1

ifconfig gif0 tunnel $LOCAL_IP $HETUNEND

ifconfig gif0 inet6 $HEMY64IP/64 alias

ifconfig gif0 inet6 $HEYOUR6END $HETHEIR6END prefixlen /$HEPREFIX

route -n add -inet6 default $HETHEIR6END

rm $IPCACHE.lock

exit 0