I still haven't found this answer anywhere...Does OpenBSD (more specifically, pf(4), I guess) support RFC 6296, IPv6-to-IPv6 Network Prefix Translation? Looks like FreeBSD can do it, but I can't tell if that's something they added to their own pf fork, or if I'm just missing something in the OpenBSD docs.
I know I can do NAT66, but I don't think it's feasible to emulate NPT using NAT66 rules.
Thanks, -Adam