6b66194bcb
If an encapsulated frame is going to have DF bit set check its desitnitions' PMTU and if it won't fit drop it and: Generate ICMP 3/4 message if the packet was to be forwarded. Return EMSGSIZE error otherwise. Obtained from: Semihalf Sponsored by: Stormshield Differential revision: https://reviews.freebsd.org/D30993