[strongSwan] Traffic selector not working as expected

[Tiago Vasconcelos]

I'm trying to restrict the traffic selector to GRE/BGP:

         rightsubnet=%dynamic[gre/bgp]
         auto=route

But GRE-encapsulated BGP traffic doesn't go through.
However, if I change the TS to:

         rightsubnet=%dynamic[gre]
         auto=route

BGP (and other GRE-encapsulated traffic) does go through.
Am I missing something?

Tiago