ipv6 HE tun script

#!/bin/sh

# Usage "sudo ./he up | down"
# Suggests? [email protected]

username=''             #Tunnelbroker.net Username
password=''           #Tunnelbroker.net Password
tunnel_id=''      #Tunnel ID
server=''          #Server IPv4 Address
client6=''         #Client IPv6 Address
server6=''         #Server IPv6 Address
interface='en1'         #interface you want to use tunnelbroker.net on. Found via ifconfig -a

if [[ $EUID -ne 0 ]]; then
   echo "Must run as root. n >>>Usage: sudo ./he up | down" 1>&2
   exit 1
fi

if [ $1 = 'up' ]; then
                curl https://$username:$password@ipv4.tunnelbroker.net/nic/update?hostname=$tunnel_id --silent > /dev/null 2>&1
                local=`ifconfig $interface | grep 'inet ' | awk '{ print $2}'`
                ifconfig gif0 tunnel $local $server > /dev/null 2>&1
                ifconfig gif0 inet6 $client6 $server6 prefixlen 128 > /dev/null 2>&1
                route -n add -inet6 default $server6 > /dev/null 2>&1
                echo "IPv6 Enabled"

        elif [ $1 = 'down' ]; then
                ifconfig gif0 deletetunnel > /dev/null 2>&1
                ifconfig gif0 inet6 $client6 $server6 prefixlen 128 delete > /dev/null 2>&1
                route -n delete -inet6 default $server6 > /dev/null 2>&1
                echo "IPv6 Disabled"
        else
                echo "Usage: sudo ./he up | down"
        fi