[Bug 247853] Port OpenBSD Wireguard kernel module to FreeBSD kernel

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=247853

Osku Äs <wireguard at sneits.fi> changed:

           What    |Removed                     |Added
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                 CC|                            |wireguard at sneits.fi

--- Comment #6 from Osku Äs <wireguard at sneits.fi> ---
I've been running tests on the lkm version on -CURRENT. It'd need -CURRENT to
compile.

In so far there has been 4 observations I've made;

1) It does connect to Linux version well. Packets that are routed through
Wireguard FreeBSD machine work well.

2) There's something funny with traffic that is destined to the machine running
wireguard, therefore to the wgX interface; ping induced echo requests work, and
FreeBSD traceroutes are responded to - however, tcp connections blackhole
somehow and won't work.

Connections to/from the other endpoint of Wireguard tunnel do work.

3) netstat counters for wgX interface aren't increasing, if the traffic is
routed to elswhere.

4) wg show will coredump on the line where last keepalive handshake should
show.

All in all, impressive work. Probably would benefit a lot by fixing 2) and 3),
4) is more of a "meh, ok".

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