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Re: [tae] [tsv-area] Transport negotiation

Iljitsch van Beijnum <iljitsch@muada.com> Thu, 27 November 2008 10:31 UTC

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From: Iljitsch van Beijnum <iljitsch@muada.com>
To: Lloyd Wood <L.Wood@surrey.ac.uk>
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Subject: Re: [tae] [tsv-area] Transport negotiation
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On 27 nov 2008, at 1:04, Lloyd Wood wrote:

> On choosing transport, couldn't http:// just map to http/<whatever- 
> is-favoured>:// ?

No.

> Explicitly asking for http/tcp:// or http/sctp:// would produce
> different behaviour. I don't see a need to involve DNS here -
> but I'd quite like to be able to specify http/tcp/ipv6:// or
> http/sctp/ipv4:// to force behaviour in the browser, while
> knowing that http:// just works.

The problem is that the HTML page with these links doesn't know if  
it's going to be parsed on a system with IPv6 or IPv4 connectivity,  
and/or with or without SCTP capability that isn't firewalled. For the  
former, you can use the DNS and the presence of addresses / a default  
route, but for the latter you never really know until you try.

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