Trigger a script on a network change in macosx 1. Move locationchanger to a location of your wish and make it executable. 2. Edit LocationChanger.plist with the location of locationchanger. 3. Move LocationChanger to ~/Library/LaunchAgents/LocationChanger.plist 4. Execute the following on a terminal: launchctl load ~/Library/LaunchAgents/Locatio…

LocationChanger.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN"
	"http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>Label</key>
	<string>locationchanger</string>
	<key>ProgramArguments</key>
	<array>
		<string>/Users/davidraviv/bin/locationchanger</string>
	</array>
	<key>WatchPaths</key>
	<array>
		<string>/Library/Preferences/SystemConfiguration</string>
	</array>
</dict>
</plist>

locationchanger.sh

#! /bin/bash

#logFile = $HOME/bin/locationchanger.log
logFile = /dev/null

# reroute only when on mobimate wifi

# determine wifi ssid
ssid=`/System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport -I | awk '/ SSID/ {print substr($0, index($0, $2))}'`

echo `date` Location: $ssid >> $logFile

if [ "$ssid" = "MyWifi" ]; then
	# we are on MobiMate, need to reroute
	echo `date` Rerouting... >> $logFile

	# get sudo privileges and perform the rerouting
	osascript -e "do shell script \"
		route -nv add 10.0.0.0/8 10.200.10.150 >> $logFile
		route -nv add 172.10.0.0/12 10.200.10.150 >> $logFile
	\" with administrator privileges"
else
	# we are on other wifi, no need to reroute
	echo `date` No need to reroute >> $logFile
fi