W3C home > Mailing lists > Public > public-automotive@w3.org > October 2017

Re: Attempting to achieve consensus re. wwwivi issue (#223)

From: Streif, Rudolf <rstreif@partner.jaguarlandrover.com>
Date: Fri, 20 Oct 2017 16:35:27 -0700
Message-ID: <CANpGCG+NLPfS-gSnCeaeHpUUJuTXBj=sKKqaNcFv=fpXgF85Bw@mail.gmail.com>
To: T Guild <ted@w3.org>
Cc: "Gavigan, Kevin" <kgavigan@jaguarlandrover.com>, Lovene Bhatia <lbhatia@jaguarlandrover.com>, Adam Crofts <acrofts1@jaguarlandrover.com>, mnot@mnot.net, Shinjiro Urata <shinjiro.urata@access-company.com>, Junichi Hashimoto <xju-hashimoto@kddi.com>, Magnus Gunnarsson <Magnus.Gunnarsson@melcogot.com>, Mike Aro <arom@us.ibm.com>, Peter Winzell <peterwinzell.gbg@gmail.com>, public-automotive <public-automotive@w3.org>
Thank you Kevin and Ted. I really would like to put this to rest now and
move on.

If I recall correctly we discussed a w3.org subdomain before. I am not sure
why it got discarded at the time. However, I am strongly in favor of it.

Let's move ahead with an Editors Draft with a w3.org subdomain/hostname.


On Fri, Oct 20, 2017 at 11:36 AM, Ted Guild <ted@w3.org> wrote:

> Part of the pushback on wwwivi even with .local is that it amounts to
> name squatting. We do not own .local so cannot lay claim to a name
> there.
> Mark Nottingham asked if we considered a w3.org hostname as the
> fallback with discovery still being the preferred method. Typically I
> have authority on w3.org subdomains but since it is for a
> specification, would need to get Director approval.
> https://github.com/w3c/automotive/issues/233
> Since there are cases that may have multiple VISS implementations in
> the same network, or have client devices introduced, discovery is
> needed. I have the impression the TAG will block us if we do not have
> it and will accept a reasonable fallback default name that will be
> usable in the simpler cases (one VISS service on a fixed network).
> Discovery makes things complicated for client applications and may have
> other negative implications such as introducing ways to attack the
> client. These would need to be worked through. We could publish a
> snapshot of the Editors Draft as a Working Draft with a w3.org hostname
> (pending approval) while we figure out the discovery issues.
> On Fri, 2017-10-20 at 11:15 +0100, Gavigan, Kevin wrote:
> > Hi Gents,
> >
> > As we know, issue #223 is the only open issue for the VIS
> > Specification and it would be great if we could resolve it so that
> > the Chairs could propose the the specification moves forward to a
> > Candidate Recommendation.
> >
> > I've added the text copied in blue below to the issue (as part of
> > trying to achieve consensus) and would be grateful for your feedback.
> >
> > We have been struggling for quite a few months to get agreement on
> > how to resolve the hostname (wwwivi) issue (#223).
> >
> > Can I suggest that we resolve the impasse by saying that the
> > implementer will document how the hostname is obtained, but suggest a
> > default value for the VIS websocket server that is hosted on the IVI
> > ECU.
> >
> > Hence, propose that we add statements like:
> >
> > /* Start of change */
> >
> > "A vehicle may have more than one VIS Server that can be accessed by
> > a client running on an ECU connected to the in-vehicle network.
> >
> > The implementer of a VIS Server will document how an in-vehicle
> > client can obtain the hostname that is needed to connect to their VIS
> > Server instance. This could be using a Discovery Service (that is
> > outside of the scope of this specification) or by configuration.
> >
> > By default, the VIS Server deployed on the In-Vehicle-Infotainment
> > system will have the hostname 'ivi.w3.org.local' but the implementer
> > may specify a different value'.
> >
> > /* End of change */
> >
> >
> > We would then change our example statements to use 'ivi.w3.org.local'
> > as hostname instead of wwwivi
> >
> > I'm not entirely sure that adding a '.local' extension to 'w3.org'
> > doesn't violate other conventions, but logically it takes account of
> > the feedback on the issue (of not cyber-squatting and making clear
> > that its a local name)
> >
> > Believe that in practice an onboard client is likely to have a config
> > file (or a Registry or similar) that can be used to define the
> > runtime configuration, so if the default is not suitable or is not
> > preferred, a different value can be configured prior to deployment of
> > the client OR the client could make use of a Discovery Service if the
> > implementer has stated in their documentation that this will be
> > available.
> >
> > I didn't want to tightly couple the spec. to a particular Discovery
> > protocol or mechanism (as these could evolve separately over time and
> > couldn't think of a better compromise or route out of this issue -
> > hope the group agrees to the above, but if it doesn't get consensus,
> > very happy to consider other alternatives...
> >
> > [Hopefully, we can settle on this (or something like it) for now, and
> > if there are strong views later about an alternative, we re-open the
> > issue at that point]
> >
> > Thanks and regards,
> >
> > Kev
> >
> > Kevin Gavigan BSc, MSc, PhD, MCP, MCTS
> > Software Architect
> > Connected Infotainment
> > Electrical, Electronic and Software Engineering (EESE)
> > Jaguar Land Rover
> >
> > Mobile: 07990 084866
> > Email: kgavigan@jaguarlandrover.com
> >
> > Office address:
> > GO03/057 • Building 523, Gaydon • Maildrop: (G03)
> > Jaguar Land Rover • Banbury Road • Gaydon • Warwick • CV35 0RR
> --
> Ted Guild <ted@w3.org>
> W3C Systems Team
> http://www.w3.org

*Rudolf J Streif*
System Architect - Open Source Initiative
Open Source Technology Centre

*M:* +1.619.631.5383
*Email:*  rstreif@partner.jaguarlandrover.com

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Received on Friday, 20 October 2017 23:35:55 UTC

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