[Bug 219991] [PATCH] TCP process bogus packets with too large ACK

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219991

Michael Tuexen <tuexen at freebsd.org> changed:

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                 CC|                            |tuexen at freebsd.org

--- Comment #1 from Michael Tuexen <tuexen at freebsd.org> ---
Can you provide a .pcap file? Whether the reaction from the FreeBSD side is OK
not not depends on SEG.SEQ of the received ACK segments. Unfortunately, tcpdump
doesn't how SEG.SEQ for the ACK segments.

Please note that https://tools.ietf.org/html/rfc793#section-3.9, page 69,
specifies the conditions under which a received TCP segment is acceptable. If
the received ACK is not acceptable (this depends on SEG.SEQ), an ACK as the one
being sent has to be sent.

So seeing the SEG.SEQ of the ACK segments is crucial here.

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