[strongSwan] Can I select a specific type for a specific protocol

[Eduardo Torres]

All,

I would like to know if in StrongSwan, this is possible.

If I set leftprotoport=58 (ICMPv6) in the security agreement.
Is it possible to select specific type like type 135 (Neighbor 
Solicitation) to be encrypted/bypass?
If yes what is the parameter needed?

The target is to bypass type 135 (Neighbor Solicitation) and 136 
(Neighbor Advertisement) and the rest to be ipsec'ed

Thanks in advance
Eduardo Torres