[Bug 253328] add IPv6 6rd supported in if_stf

From: <bugzilla-noreply_at_freebsd.org>
Date: Wed, 10 Nov 2021 13:13:48 UTC

Kristof Provost <kp@freebsd.org> changed:

           What    |Removed                     |Added
                 CC|                            |kp@freebsd.org

--- Comment #2 from Kristof Provost <kp@freebsd.org> ---
(In reply to depeo from comment #1)
I'm not sure I understand your remark. The pfsense patch appears to assume the
IPv6 6RD prefix is always 32 bits long, but it does support using fewer than 32
bits of the IPv4 address.

This should only matter if the ISP uses a 6RD prefix that's not 32 bits long,
but it shouldn't affect how you subnet your 6rd delegated prefix (i.e. the ISPs
6RD prefix + x bits from your IPv4 WAN address).

I'm working on cleaning up the patch to get it committed, and will see if I can
fix the 6RD prefix length assumption as well. It needs a lot of other cleanup

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