Re: TCP stack behaviour question

From: Michael Kerrisk
Date: Mon Sep 18 2006 - 11:38:59 EST


Von: Andi Kleen <ak@xxxxxxx>
> On Monday 18 September 2006 16:19, Stuart MacDonald wrote:
> > From: Andi Kleen [mailto:ak@xxxxxxx]
> > > > # 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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