Andrey V. Elsukov f909db0b19 Add IPv4 fragments reassembling to NAT64LSN.
NAT64LSN requires the presence of upper level protocol header
in a IPv4 datagram to find corresponding state to make translation.
Now it will be handled automatically by nat64lsn instance.

Reviewed by:	melifaro
Obtained from:	Yandex LLC
MFC after:	1 week
Sponsored by:	Yandex LLC
Differential Revision:	https://reviews.freebsd.org/D26758
2020-10-13 18:57:42 +00:00
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