Advskew and Gateway Status

[Asmyth]

Hi Guys

I've got 2 pfsense routers in a carp setup with an internet service each and I'd like to change the advskew of each router depending on the gateway status. So far I know using some scripting I can change the advskew, Also I'm sure its possible to read the gateway status however I have yet to find the right command to read the gateway status and also where and how to run said script.

So if anyone can give me some guidance on the right commands and where to run the script it would be kindly appreciated.

Regards Asmyth