[strongSwan] Reinventing the wheel (not): updown and multiple children

[Carlos G Mendioroz]

I'm trying to come up with an updown script for xfrm interface handling.
So far I've managed to get routed working, now I want to have policy 
based VPNs covered too.

But then I assume I have to create the XFRM only if it's not there 
already, and then manage adding routes to a table much like starter does.

Is there an easy way to know when to remove the interface ?
(so last updown call actually deletes the interface when going down)
Counting would be the sure way, but may be there's a hook already built in ?

TIA,
-- 
Carlos G Mendioroz  <tron at huapi.ba.ar>  LW7 EQI  Argentina