#!/bin/sh
# rc.hurricane - version 0.2
# Hurricane Electric TB - IPv4 endpoint update script
# Required packages: curl, gawk, iproute2
#
# Usage: ./rc.hurricane [-4]
#		     or [-t]
# Arguments:
#	-4 - updates only IPv4 endpoint
#	-t - updates only tunnel interfaces
# Running without arguments will update both things."
#
# History:
# 0.1 (2008-07-30) - first release
# 0.2 (2009-04-19) - removed deprecated sit0 interface
#
# copyleft (c) 2008-2009 Damian Pasternok
# All rights reversed. <my_forename at pasternok.org>
#
### config
NETIF=ppp0				# WAN interface (if empty or incorrect the 'whatismyip' will be used)
TUNIF=he-ipv6				# tunnel interface
SVIPV4=216.66.80.30			# Server IPv4 address (get this from the tunnel details page)
CLIPV6=2001:0470:1234:abc::2/64		# Client IPv6 address (get this from the tunnel details page)
USERID=0123456789abcdef0123456789abcdef	# UserID (get this from the main page of the tunnelbroker)
PASSWD=abcdef0123456789abcdef0123456789	# MD5 Hash of your password (make this with echo -n <password> | openssl md5)
TUNID=12345				# Global Tunnel ID (get this from the tunnel details page)
#
### code
function whatismyip {
	curl -s "http://whatismyip.com/automation/n09230945.asp"
}
function usage {
	echo "Usage: ./rc.hurricane [-4]
		   or [-t]
Arguments:
	-4 - updates only IPv4 endpoint
	-t - updates only tunnel interface
Running without arguments will update both things."
}
OK="\r\t\t\t\t\t\t[\033[1;32;40m  ok  \033[0m]"
FAIL="\r\t\t\t\t\t\t[\033[1;31;40mfailed\033[0m]"
#
# get new IPv4
if [ $NETIF ]; then
	NEWIP=`ip addr show dev $NETIF 2> /dev/null | grep inet | awk '{ print $2 }'`
	if [ ! $NEWIP ]; then
		NEWIP=`whatismyip`
	fi
else
	NEWIP=`whatismyip`
fi
#
# update IPv4 endpoint
if [ ! $1 ] || [ $1 = "-4" ] && [ ! $2 ]; then
	echo -n "Trying to update new IPv4 endpoint..."
	RES=`curl -Gksd "ipv4b=${NEWIP}&pass=${PASSWD}&user_id=${USERID}&tunnel_id=${TUNID}" "https://ipv4.tunnelbroker.net/ipv4_end.php"`
	if [ "$RES" = "That IPv4 endpoint is already in use." ]; then
	        echo -e "$FAIL\n$RES"
	else
		echo -e "$OK\n$RES"
	fi
	if [ $1 ]; then
		exit
	fi
elif [ $1 != "-t" ]; then
	usage
	exit
fi
#
# update tunnel interfaces
if [ ! $1 ] || [ $1 = "-t" ] && [ ! $2 ]; then
	echo -ne "Setting up \033[1;29;40m${TUNIF}\033[0m..."
	ip tunnel del $TUNIF 2> /dev/null
	ip tunnel add $TUNIF mode sit remote $SVIPV4 local $NEWIP ttl 255
	ip link set $TUNIF up
	echo -ne "$OK\nAdding IPv6 and route to \033[1;29;40m${TUNIF}\033[0m..."
	ip addr add $CLIPV6 dev $TUNIF
	ip route add ::/0 dev $TUNIF
	echo -e "$OK"
	exit
else
	usage
	exit
fi