[Bug 218907] tcpmd5 kernel module on STABLE/11 doesn't work with vultr bgp via bird

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=218907

--- Comment #2 from Joseph Mulloy <freebsd-bugs at joe.mulloy.me> ---
(In reply to Andrey V. Elsukov from comment #1)

Thanks.

I compiled the STABLE/11 kernel from r317316.

Below is the output of setkey and netstat. I used the netstat out of the
snapshot tarball as suggested. It seems bird isn't interacting the the kernel
API/ABI correctly. Perhaps I need to recompile it for this kernel, or if I'm
less lucky it needs to be patched. I've converted the actual output in the
lines that contain "A: tcp-md5" since I think these might be my private key.

root at vps-vu-nj-1b:~/base # ./usr/bin/netstat -sp tcp | grep signature
        0 packets with matching signature received
        0 packets with bad signature received
        26059 times failed to make signature due to no SA
        0 times unexpected signature received
        0 times no signature provided by segment

root at vps-vu-nj-1b:~/base # setkey -D
2001:19f0:5:6a3::1 2001:19f0:ffff::1
        tcp mode=any spi=264796535(0x0fc87977) reqid=0(0x00000000)
        A: tcp-md5  XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
        seq=0x00000000 replay=0 flags=0x00000040 state=mature
        created: Apr 27 05:14:25 2017   current: Apr 28 04:20:09 2017
        diff: 83144(s)  hard: 0(s)      soft: 0(s)
        last: Apr 27 05:14:29 2017      hard: 0(s)      soft: 0(s)
        current: 957600(bytes)  hard: 0(bytes)  soft: 0(bytes)
        allocated: 9576 hard: 0 soft: 0
        sadb_seq=1 pid=87046 refcnt=1
45.76.6.230 169.254.169.254
        tcp mode=any spi=4096(0x00001000) reqid=0(0x00000000)
        A: tcp-md5  XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
        seq=0x00000000 replay=0 flags=0x00000040 state=mature
        created: Apr 27 05:14:25 2017   current: Apr 28 04:20:09 2017
        diff: 83144(s)  hard: 0(s)      soft: 0(s)
        last: Apr 27 05:14:29 2017      hard: 0(s)      soft: 0(s)
        current: 766000(bytes)  hard: 0(bytes)  soft: 0(bytes)
        allocated: 9575 hard: 0 soft: 0
        sadb_seq=0 pid=87046 refcnt=1

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