From: kuznet@ms2.inr.ac.ru
To: davem@redhat.com (David S. Miller)
Cc: Mika.Liljeberg@welho.com, linux-kernel@vger.kernel.org
Subject: Re: TCP LAST-ACK state broken in 2.4.17-pre2
Date: Tue, 11 Dec 2001 20:24:15 +0300 (MSK) [thread overview]
Message-ID: <200112111724.UAA02436@ms2.inr.ac.ru> (raw)
In-Reply-To: <20011210.161332.30184646.davem@redhat.com> from "David S. Miller" at Dec 10, 1 04:13:32 pm
Hello!
> A socket in a synchronized state is required to enforce legal sequence
> numbers, is it not?
They are . :-)
Well, assuming that this is really illegal we could just add
missing LAST_ACK close to its relative CLOSING, CLOSE_WAIT
(where it was forgotten old days occasionally, I think).
It is minimal change and this is good.
But I look at problem at our side: if we receive such packet yet,
what should we make? Earlier we sent an ACK and dropped
bad segment or aborted connection. Now we just blackhole them
and the bug with missing case LAST_ACK just allowed to see the fact
that we changed behaviour, which is not good. :-)
Alexey
next prev parent reply other threads:[~2001-12-11 17:25 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-10 18:16 Mika Liljeberg
2001-12-10 18:34 ` kuznet
2001-12-10 18:54 ` Mika Liljeberg
2001-12-11 17:51 ` kuznet
2001-12-12 20:31 ` Mika Liljeberg
2001-12-13 17:59 ` kuznet
2001-12-13 19:30 ` Mika Liljeberg
2001-12-13 19:38 ` kuznet
2001-12-11 0:13 ` David S. Miller
2001-12-11 17:24 ` kuznet [this message]
2001-12-13 10:19 Pasi Sarolahti
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