Removing T/TCP and replacing it with something simpler

[Andre Oppermann]

Karim Fodil-Lemelin wrote:
> 
> Now,
> 
>     I have a question. In our application which can be described as:
> 
> Client ----> (Client Gateway) -------> SATLINK ------> (Server Gateway)
> -----> Internet
> 
> We act as the Internet servers (transparent proxies) and therefore T/TCP
> traffic is only sent over the SATLINK. In the current T/TCP
> implementation the sender has to send a ccnew option to discover that
> the server side supports T/TCP. Now we had to modify this so the
> gateways uses the knowledge that they work together and they don't need
> to send a ccnew option everytime a client makes a connection to a new
> server.
> 
> My question is: In the new implementation does the cookie will be
> generated per machine or like the tao mecanism will it be based on a src
> / dst tuple?

The new cookie system will use the src-host/dst-host tuple.  The first
tcp connection between two hosts (port numbers are irrelevant) is a
normal three-way handshake and the cookie is exchanged.  From then on
it skips over 3WHS on the server if the cookie matches.

-- 
Andre


> Regards.
> 
> Matt Sealey wrote:
> 
> >His product looks like it's the the product mentioned in the original post by
> >the original poster;
> >
> >http://docs.freebsd.org/cgi/getmsg.cgi?fetch=284774+0+/usr/local/www/db/text/2004/freebsd-net/20041024.freebsd-net
> >
> >QUOTE:
> >
> >However something like T/TCP is certainly useful and I know of one special
> >purpose application using it (Web Proxy Server/Client for high-delay Satellite
> >connections).
> >
> >As long as they can live with FreeBSD 5.3 I don't think it causes a problem
> >whatsoever does it?
> >
> >
> >
> Right, Actually we are based on FBSD 4.9 and we are planning to port to
> 5.3 as soon as it gets stable, which  could be anytime soon ;).
> 
> --
> Karim Fodil-Lemelin
> Lead Programmer
> 
> Xiphos Technologies Inc.
> (514) 848-9640 x223
> (514) 848-9644 fax
> www.xiplink.com
> 
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