lkml.org 
[lkml]   [2004]   [Jul]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] fix tcp_default_win_scale.
On Wed, 7 Jul 2004 00:44:53 +0200
bert hubert <ahu@ds9a.nl> wrote:

> Not true - the outgoing SYN packet had window scale 7, when it was sent. The
> SYN|ACK had window scale 0, when received by the initiating system.
>
> Also - even if the remote were to assume a 47 byte window size, would it not
> be able to send small packets? Or does the window size also include
> packet haders?

SWS avoidance makes us not send packets. See this quote in an email
from John Heffner the other week:

================================
To elaborate on my earlier mail. my hypothesis is that somehow the web
server beleives that we sent a winscale of 0. In such a case, when we try
to advertise our initial 4*MSS (5840 bytes) of window, with a window scale
of 3 we use a value of 730 in the window field. All sender SWS avoidance
(RFC1122) tests will fail, most notably 1 (because we already advertised
5840 bytes and 730 < 5840/2) and 3 (because 730 < 1460). With a winscale
of 2, we will use a value of 1460 in the window field, so both tests will
succeed.
================================
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2005-03-22 14:04    [from the cache]
©2003-2011 Jasper Spaans