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Date: Sat, 14 Dec 2002 00:58:19 +0200
From: Matti Aarnio <matti.aarnio@zmailer.org>
To: Nivedita Singhvi <niv@us.ibm.com>
Cc: Andrew McGregor <andrew@indranet.co.nz>,
       Bogdan Costescu <bogdan.costescu@iwr.uni-heidelberg.de>,
       "David S. Miller" <davem@redhat.com>, dlstevens@us.ibm.com,
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       stefano.andreani.ap@h3g.it, linux-kernel@vger.kernel.org,
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Subject: Re: R: Kernel bug handling TCP_RTO_MAX?
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On Fri, Dec 13, 2002 at 10:07:01AM -0800, Nivedita Singhvi wrote:
> Andrew McGregor wrote:
> > In a closed network, why not have SOCK_STREAM map to something faster than
> > TCP anyway?  That is, if I connect(address matching localnet), SOCK_STREAM
> > maps to (eg) SCTP.  That would be a far more dramatic performance hack!
> > 
> > Andrew
> 
> Not that simple. SCTP (if that is what Matti was referring to) is 
> a SOCK_STREAM socket, with a protocol of IPPROTO_SCTP. I'm just
> getting done implementing a testsuite against the SCTP API.

  Most likely that is what I did mean.
Things in IETF do on occasion change names, or I don't always
remember all characters in (E)TLA-acronyms I use rarely...

...
> But dont expect SCTP to be the surreptitious underlying layer
> carrying TCP traffic, if thats an expectation that anyone has :)

At least I didn't expect that, don't know of others.

It all depends on application coders, if users will be able
to use arbitrary network protocols -- say any SOCK_STREAM
protocol supported now, and in future by system kernel.
Ever heard of "TLI" ?

> Solving this problem without application involvement is a 
> more limited scenario..

Yes, but sufficiently important to occasionally.

Doing things like this mapping might make limited sense
via routing table lookups.

> thanks,
> Nivedita

/Matti Aarnio
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