Date: Wed, 8 Oct 1997 21:50:18 +0200 From: j@uriah.heep.sax.de (J Wunsch) To: hackers@FreeBSD.ORG Cc: mrcpu@cdsnet.net (Jaye Mathisen) Subject: Re: A TCP problem, plus solution! (3.0-current) Message-ID: <19971008215018.SO62644@uriah.heep.sax.de> In-Reply-To: <Pine.NEB.3.95.971008104120.25558C-100000@mail.cdsnet.net>; from Jaye Mathisen on Oct 8, 1997 10:44:28 -0700 References: <Pine.NEB.3.95.971008104120.25558C-100000@mail.cdsnet.net>
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As Jaye Mathisen wrote:
> I traced it to a sysctl I had in /etc/rc.local that bumped the tcp
> recvspace to 65536.
>
> Resetting it to the default clears the problem up.
You are not running -current. ;-)
RCS file: /home/cvs/src/sys/netinet/tcp_output.c,v
...
revision 1.27
date: 1997/10/07 21:10:06; author: fenner; state: Exp; lines: +3 -3
Don't allow the window to be increased beyond what is possible to
represent in the TCP header. The old code did effectively:
win = min(win, MAX_ALLOWED);
win = max(win, what_i_think_i_advertised_last_time);
so if what_i_think_i_advertised_last_time is bigger than can be
represented in the header (e.g. large buffers and no window scaling)
then we stuff a too-big number into a short. This fix reverses the
order of the comparisons.
PR: kern/4712
--
cheers, J"org
joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)
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