#!/bin/sh


    # One may need to change this as well. This is the code for Italy
    COUNTRY=VF_IT

    # The URL uses "%40" for "@". We do the same
    USERNAME=<your username>%40<your domain>
    PASSWORD=<your password>


while [ true ]
do
        ifconfig en0 | grep  "inactive" || wget -qO- http://captive.apple.com/hotspot-detect.html 2>&1 | grep 'Success' > /dev/null

        if [ $?  != 0 ]; then

#
# if Captive Network Assistant app launches, for some reason DNS doesn't work.
# Just kill it

                killall -9 "Captive Network Assistant" 2>&1 > /dev/null

# The challenge number seems to change at each connection. Grab it
# Grab it querying an IP number in case DNS isn't active.

                CHALLENGE=$(wget 8.8.8.8 2>&1 | grep challenge | awk -F= '{ print $7 }' | tail -1 | awk -F& '{ print $1 }')

# Just for debug purposes
#               echo challenge is $CHALLENGE

# I have changed the **nasid** and **mac numbers** for security reasons
# I believe one should use their own anyway.

                wget --save-cookies cookiejar --keep-session-cookies
                        --post-data "chooseCountry=$COUNTRY%2F&userFake=$USERNAME$&UserName=$COUNTRY%2F$USERNAME&Password=$PASSWORD&_rememberMe=on"
                        "https://it.portal.vodafone-wifi.com/jcp/it?res=login&nasid=90-35-6E-E8-E1-60&uamip=192.168.6.1&uamport=80&mac=F4-5B-89-83-00-2D&challenge=$CHALLENGE"
                        2> /dev/null
        fi
        sleep 10
done