Casper Extension Attribute

If you are using Casper (popular for high school computer administration), here is another approach to get GPS location of the remote computer put into an Extension Attribute. It matches Wifi SSID addresses against the Google browser location API.

Source: https://www.jamf.com/jamf-nation/discussions/12300/nice-little-scripts-to-scope-to-stolen-computers

Caveat: this solution relies on the Google Maps API, which may require licensing to use en masse.

Thank you to Jay Duff for bringing this to our attention.

#!/bin/sh
INTERFACE=$(networksetup -listallhardwareports | grep -A1 Wi-Fi | tail -1 | awk '{print $2}')
STATUS=$(networksetup -getairportpower $INTERFACE | awk '{print $4}')
if [ $STATUS = "Off" ] ; then
    sleep 5
    networksetup -setairportpower $INTERFACE on
fi

/System/Library/PrivateFrameworks/Apple80211.framework/Versions/A/Resources/airport -s | tail -n +2 | awk '{print substr($0, 34, 17)"$"substr($0, 52, 4)"$"substr($0, 1, 32)}' | sort -t $ -k2,2rn | head -12 > /tmp/gl_ssids.txt

if [ $STATUS = "Off" ] ; then
    networksetup -setairportpower $INTERFACE off
fi

OLD_IFS=$IFS
IFS="$"
URL="https://maps.googleapis.com/maps/api/browserlocation/json?browser=firefox&sensor=false"
exec 5</tmp/gl_ssids.txt
while read -u 5 MAC SS SSID
do
    SSID=`echo $SSID | sed "s/^ *//g" | sed "s/ *$//g" | sed "s/ /%20/g"`
    MAC=`echo $MAC | sed "s/^ *//g" | sed "s/ *$//g"`
    SS=`echo $SS | sed "s/^ *//g" | sed "s/ *$//g"`
    URL+="&wifi=mac:$MAC&ssid:$SSID&ss:$SS"
done
IFS=$OLD_IFS

#echo $URL
curl -s -A "Mozilla" "$URL" > /tmp/gl_coordinates.txt
LAT=`cat /tmp/gl_coordinates.txt | grep \"lat\" | awk '{print $3}' | tr -d ","`
LONG=`cat /tmp/gl_coordinates.txt | grep \"lng\" | awk '{print $3}' | tr -d ","`
ACC=`cat /tmp/gl_coordinates.txt | grep \"accuracy\" | awk '{print $3}' | tr -d ","`
#echo "LAT:  $LAT"
#echo "LONG: $LONG"
#echo "ACC: $ACC"

curl -s -A "Mozilla" "http://maps.googleapis.com/maps/api/geocode/json?latlng=$LAT,$LONG&sensor=false" > /tmp/gl_address.txt
ADDRESS=`cat /tmp/gl_address.txt | grep "formatted_address" | head -1 | awk '{$1=$2=""; print $0}' | sed "s/,$//g" | tr -d \" | sed "s/^ *//g"`

if [ "$EA" != 0 ] ; then
    echo "<result>$ADDRESS (lat=$LAT, long=$LONG, acc=$ACC)</result>"
else
    echo "$ADDRESS (lat=$LAT, long=$LONG, acc=$ACC)"
fi

rm /tmp/gl_ssids.txt /tmp/gl_coordinates.txt /tmp/gl_address.txt

exit 0