From: Manfred Spraul <manfred@colorfullife.com>
To: dwd@bell-labs.com, linux-kernel@vger.kernel.org
Subject: Re: Linux 2.2.16 through 2.2.18preX TCP hang bug triggered by rsync
Date: Tue, 23 Jan 2001 23:17:10 +0100 [thread overview]
Message-ID: <3A6E02E6.B3261E1@colorfullife.com> (raw)
I read through the tcpdump, and it seems that Linux completely ignores
packets with out-of-window sequence numbers:
* the solaris computers (dynamic...) sends further data although the
Linux box (static) says 'win 0'.
See lines 2067, 2069, 2076, ...
2066 16:31:43.108759 eth0 > static.8664 > dynamic.ih.lucent.com.39406:
. 1583720:1583720(0) ack 69041 win 0 (DF)
2067 16:31:43.110623 eth0 < dynamic.ih.lucent.com.39406 > static.8664:
P 69041:69628(587) ack 1583721 win 0 (DF)
2078 16:31:43.896657 eth0 < dynamic.ih.lucent.com.39406 > static.8664:
. 69041:69041(0) ack 1583721 win 8760 (DF)
* this is the last ack with an in-window sequence number.
.
.
.
2136 16:35:08.488774 eth0 > static.8664 > dynamic.ih.lucent.com.39406:
. 1583721:1585181(1460) ack 69041 win 0 (DF)
* the linux computer sends data
2137 16:35:08.492158 eth0 < dynamic.ih.lucent.com.39406 > static.8664:
. 70501:70501(0) ack 1592481 win 8760 (DF)
* but ignores the ack, probably because the sequence number is out of
window
Perhaps someone who understand TCP could check the code and compare it
with the RFC's?
--
Manfred
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next reply other threads:[~2001-01-24 8:05 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-23 22:17 Manfred Spraul [this message]
2001-01-23 22:59 ` Linux 2.2.16 through 2.2.18preX TCP hang bug triggered by rsync Manfred Spraul
2001-01-24 20:03 ` kuznet
2001-01-24 20:34 ` Manfred Spraul
2001-01-24 20:42 ` kuznet
2001-01-25 18:35 ` kuznet
2001-01-24 20:56 ` Andi Kleen
2001-01-25 10:58 ` Matthias Andree
2001-01-25 12:17 ` James Sutherland
2001-01-25 12:27 ` Matthias Andree
2001-01-25 11:32 ` David S. Miller
2001-01-25 11:40 ` Andi Kleen
2001-01-25 11:44 ` David S. Miller
2001-01-25 11:56 ` Andi Kleen
2001-01-25 12:25 ` James Sutherland
-- strict thread matches above, loose matches on Subject: below --
2001-01-26 20:56 Dave Dykstra
2001-01-27 18:27 ` kuznet
2001-01-25 12:24 Studierende der Universitaet des Saarlandes
2001-01-25 12:34 ` Andi Kleen
2001-01-23 20:42 Dave Dykstra
2001-01-23 22:51 ` Dave Dykstra
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