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Date:      Wed, 18 Jun 1997 23:31:09 -0400
From:      "Louis A. Mamakos" <louie@TransSys.COM>
To:        "Alexander V. Tischenko" <flash@hway.ru>
Cc:        "David S. Miller" <davem@jenolan.rutgers.edu>, freebsd-hackers@FreeBSD.ORG, Eric.Schenk@dna.lth.se
Subject:   Re: RFCs and Urgent pointers 
Message-ID:  <199706190331.XAA00910@whizzo.TransSys.COM>
In-Reply-To: Your message of "Wed, 18 Jun 1997 17:32:16 %2B0400." <Pine.BSI.3.96.SK.970618173034.20551A-100000@thorin.hway.ru> 
References:  <Pine.BSI.3.96.SK.970618173034.20551A-100000@thorin.hway.ru> 

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> On Wed, 18 Jun 1997, David S. Miller wrote:
> 
> >    Date: Wed, 18 Jun 1997 16:50:13 +0400 (MSD)
> >    From: "Alexander V. Tischenko" <flash@hway.ru>
> > 
> >    Anybody thought of adding the RFC style Urgent pointers to the TCP,
> >    say, as TCP level socket option ?
> > 
> > We've made this a sysctl() tunable under Linux, I don't think we
> > considered the benefits of making it a socket option, that may in fact
> > be a better approach.  Comments?
> > 
> I suppose it is better to make it an option, 'cause this way you can set
> it on per-socket basis from your applications.

TCP urgent data is how the socket out-of-band-data abstraction is realized.  I
don't understand what else you might "add" to TCP to do "Urgent Pointers". 
There ought to already be a option for "inline" out-of-band data, which I
think is the default in most modern BSD-based TCPs.

louie






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