#/bin/sh
# HomePass
DATE=$(date)
# Put a filename and path in here if you wish to log each profile change
LOG="HomePass.log"
# The WiFi network number we need to toggle the MAC address of
# You must have already added a WiFi network with the ssid "attwifi" and clicked "save & apply"
WIFI=$(uci show wireless | grep "ssid=attwifi" | awk 'NR>1{print $1}' RS=[ FS=])
# MAC address list is missing or empty, reload it from the server
if [ ! -s HomePass.list ]; then
  # If you only want to use the primaries and Nintendo World (not the SPOOF range)
  # then delete the current HomePass.list and add ?new=1 to the end of the next line
  wget -O HomePass.list http://csdprojects.co.uk/3DS/HomePass.php
fi

if [ ! -s HomePass.list ]; then
  echo "MAC address list is missing or zero in length and we were unable to update it.  Try again later."
  exit
fi

LENGTH=$(wc -l < HomePass.list)

if [ -z "$WIFI" ]; then
  echo Unable to identify the WiFi configuration for the attwifi network!
  echo Please make sure you have created a Wifi network with the ssid attwifi before running this script.
  exit
fi

# If no profile was manually specified then read it from uci
if [ -z "$1" ]; then
  I=$(uci get wireless.@wifi-iface[$((WIFI))].profile)
  # If there is no uci entry then we start from scratch
  if [ -z "$I" ]; then
    I=1
  else
    I=$((I+1))
  fi
  # If we went over the last profile we reset back to $MIN
  if [ $I -gt $LENGTH ]; then
    I=1
  fi
else
  I=$1
fi

# Read MAC address number $I from the list
MAC=$(sed -n $((I))p HomePass.list)
# Make sure we actually got a MAC address from the list
if [ -n "$MAC" ]; then
  echo Setting profile $I, $MAC, $DATE
  # Write profile changes to a log file
  if [ -n "$LOG" ]; then
    echo Setting profile $I, $MAC, $DATE >> $LOG
  fi
  # Save a custom config called profile so that we know where we are in the list next time
  uci set wireless.@wifi-iface[$((WIFI))].profile=$I
  # Save the new MAC address
  uci set wireless.@wifi-iface[$((WIFI))].macaddr=$MAC
  # Restart the WiFi
  wifi 2>1 >/dev/null
else
  echo "We had a problem reading the MAC address from the list, aborting."
fi