[Bug 210860] [pf] [ip6] Incorrect TCP checksums after rdr

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=210860

Andrey V. Elsukov <ae at FreeBSD.org> changed:

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                 CC|                            |ae at FreeBSD.org

--- Comment #3 from Andrey V. Elsukov <ae at FreeBSD.org> ---
(In reply to Kristof Provost from comment #1)
> It'd be slightly surprising to have a checksum issue specifically for IPv6,
> because the IPv6 header doesn't have a checksum, and I'd expect the TCP
> checksum handling to be the same between v4 and v6.

I didn't looked into the code, but despite the fact that IPv6 header doesn't
have a checksum field, ULP checksums are handled differently in IPv4 and IPv6
due to different pseudo headers.

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