Using Applescript to connect to VPN and add routes

Question

I posted this in the wrong place last night, but actually managed to get an answer to it. Here is the original post:
I need to be able to set some routes upon opening a particular VPN connection so I did some searching and found a really simple Applescript that does the job. Problem is it tries to set the routes before the VPN actually connects so the routes don't go in.
I added in a 10 second delay which does the trick, but I'm thinking there has to be a way to do this that waits until the VPN actually connects before continuing - so if it takes 5 seconds or 10 or whatever, it waits.
The other thing I'm doing that I think is bad is I'm sending a route delete command before sending the add command. Why? Because if I don't and for some reason the route is partially in the table, it doesn't give an error and ends up not routing. Again, probably a better way to do this.
Here is my current script:
-- Connect Work VPN
tell application "System Events"
tell current location of network preferences
set VPNservice to service "Work" -- name of the VPN service
if exists VPNservice then connect VPNservice
end tell
end tell
delay 10
set gateway to "x.x.x.x" -- omitted here for security
do shell script "route delete 192.168.25.0/24 " & gateway with administrator privileges
do shell script "route delete 192.168.20.0/24 " & gateway with administrator privileges
do shell script "route add 192.168.25.0/24 " & gateway with administrator privileges
do shell script "route add 192.168.20.0/24 " & gateway with administrator privileges
From the response I received, I modified the script to this:
tell application "System Events"
tell current location of network preferences
set VPNservice to service "Work" -- name of the VPN service
if exists VPNservice then connect VPNservice
repeat until (connected of current configuration of VPNservice)
delay 1
end repeat
end tell
end tell
set gateway to "x.x.x.x" -- omitted here for security
do shell script "route delete 192.168.25.0/24 " & gateway with administrator privileges
do shell script "route delete 192.168.20.0/24 " & gateway with administrator privileges
do shell script "route add 192.168.25.0/24 " & gateway with administrator privileges
do shell script "route add 192.168.20.0/24 " & gateway with administrator privileges
That seems to work perfectly, but I'm still wondering if there is a better way of handling the routes. Suggestions?
Thanks.

Answer 1

I realize the VPN gateway should add the routes, but it's not and they don't seem to want it to. No idea why.
As for deleting/adding the routes, yes it does seem wrong to do this or pointless. The reason I'm doing this is for what I found in my testing of the script which was if the script hung for some reason and the route did not fully go into the table, I would be unable to add it with the script when I ran it again.
I'm probably not explaining it that well, but when I couldn't route after trying to run my script initially, I tried manually running the add route command and I'd get an error. Thus, I deleted/added the route and than it worked again.
As pointless as it seems it works every time. I'm sure there's a better/cleaner/smarter way of doing this, but I don't know enough about Applescript to do any more. At this point I can probably remove the delete command, though, since it should run properly each time.