linux-kernel - Re: TCP stack behaviour question

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Message-ID: <20060918153837.263210@gmx.net>
Date:	Mon, 18 Sep 2006 17:38:37 +0200
From:	"Michael Kerrisk" <mtk-manpages@....net>
To:	Andi Kleen <ak@...e.de>, stuartm@...necttech.com
Cc:	linux-kernel@...r.kernel.org
Subject: Re: TCP stack behaviour question

Von: Andi Kleen <ak@...e.de>
> On Monday 18 September 2006 16:19, Stuart MacDonald wrote:
> > From: Andi Kleen [mailto:ak@...e.de] 
> > > > # man 7 ip
> > > > ..
> > > >                Note that TCP has no error queue; MSG_ERRQUEUE is
> > > > illegal on SOCK_STREAM sockets.  Thus all errors are returned by
> > > > socket function return or SO_ERROR only.
> > > > 
> > > > Maybe the man page is wrong? That's from my FC 3 install.
> > > 
> > > The sentence is correct, but TCP has a IP_RECVERR that works
> > > differently without a queue. Basically it doesn't delay the error 
> > > reporting for incoming ICMPs to the last retransmit, but reports
> > > them immediately. This is documented in tcp(7)
> > 
> > I read that too, but didn't know which one was correct, so I erred on
> > the side of caution and believed ip(7).
> 
> Ok maybe it's a bit misleading. Michael, you might want to clarify.

Can some one of you propose a better text please?

Cheers,

Michael
-- 
Michael Kerrisk
maintainer of Linux man pages Sections 2, 3, 4, 5, and 7 

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