From: Stephen Hemminger <shemminger@linux-foundation.org>
To: "David S. Miller" <davem@davemloft.net>
Cc: Sangtae Ha <sha2@ncsu.edu>
Cc: Luca De Cicco <ldecicco@gmail.com>
Cc: Gavin McCullagh <gavin.mccullagh@nuim.ie>
Cc: netdev@vger.kernel.org
Subject: [RFC 0/3] TCP congestion control RTT patches
Date: Thu, 19 Jul 2007 08:41:29 +0100 [thread overview]
Message-ID: <20070719074129.670215301@linux-foundation.org> (raw)
These patches deal with issues brought up by Gavin McCullagh
about reactions of Cubic and HTCP to hostile receivers that return
bogus timestamp options. In a couple of places the timestamp value
is used in ways that could cause unfairness.
The solution in these patches is to only use local values to measure
RTT for congestion control. The timestamp is still used as described
in RFC's to measure RTT used for retransmit timer.
This code is preliminary and not throughly tested yet. It could
be backported to 2.6.22 for stable kernels, but it would be hard to
go back to earlier kernels because it builds on the recent TCP congestion
control API changes.
--
next reply other threads:[~2007-07-19 8:24 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-19 7:41 Stephen Hemminger [this message]
2007-07-19 7:41 ` [RFC 1/3] TCP: congestion control API pass RTT in microseconds Stephen Hemminger
2007-07-19 7:41 ` [RFC 2/3] TCP: cubic - eliminate use of receive time stamp Stephen Hemminger
2007-07-19 10:47 ` Ilpo Järvinen
2007-07-19 7:41 ` [RFC 3/3] TCP: htcp - use measured rtt Stephen Hemminger
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