Which package/module for 'ipsec' interface?

Hi guys.

With strongswan/swanctl - which package (and config parts if needed) should give 'swanctl' the ipsec0 interface(s) ?
Where I come from - still new to oWRT - which is Redhat family of Linux, simply adding 'libipsec' package does the trick and 'swanctl' create those upon successful connection.

thanks, L.

ok, it is: strongswan-mod-kernel-libipsec