[Bug 222705] ipfw "proto udp" parsing problem

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222705

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

           What    |Removed                     |Added
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                 CC|                            |ae at FreeBSD.org

--- Comment #3 from Andrey V. Elsukov <ae at FreeBSD.org> ---
Created attachment 187264
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=187264&action=edit
Proposed patch for unreach opcode

This patch adds mapping of IPv4 unreach codes into IPv6 codes that is also used
in NAT64. The only difference, that "unreach proto" is not converted into
"paramater problem", because unreach6 opcode must send ICMPv6 destination
unreachable message. I'm unable to reproduce the problem described in comment
#1.
This patch should only affect the case, when you have "unreach port" and IPv6
packet is matched by rule.

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