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Re: you have running code ... I-D Action: draft-ietf-6man-ipv6only-flag-03.txt

Mark Smith <markzzzsmith@gmail.com> Wed, 31 October 2018 09:31 UTC

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From: Mark Smith <markzzzsmith@gmail.com>
Date: Wed, 31 Oct 2018 20:31:44 +1100
Message-ID: <CAO42Z2wnBBcsjc7aoG0kwH9aJV2DseZjand1xhHz4028MG4ccw@mail.gmail.com>
Subject: Re: you have running code ... I-D Action: draft-ietf-6man-ipv6only-flag-03.txt
To: Alexandre Petrescu <alexandre.petrescu@gmail.com>
Cc: 6man WG <ipv6@ietf.org>
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On Wed., 31 Oct. 2018, 20:20 Alexandre Petrescu <
alexandre.petrescu@gmail.com wrote:

>
>
> Le 30/10/2018 à 21:12, Bjoern A. Zeeb a écrit :
> > On 16 Oct 2018, at 23:09, internet-drafts@ietf.org wrote:
> >
> >> A New Internet-Draft is available from the on-line Internet-Drafts
> >> directories.
> >> This draft is a work item of the IPv6 Maintenance WG of the IETF.
> >>
> >>         Title           : IPv6 Router Advertisement IPv6-Only Flag
> >>         Authors         : Robert M. Hinden
> >>                           Brian Carpenter
> >>     Filename        : draft-ietf-6man-ipv6only-flag-03.txt
> >>     Pages           : 12
> >>     Date            : 2018-10-16
> >>
> >> Abstract:
> >>    This document specifies a Router Advertisement Flag to indicate to
> >>    hosts that the administrator has configured the router to advertise
> >>    that the link is IPv6-Only.  This document updates RFC5175.
> >
> > You have running code:
> >
> >
> https://lists.freebsd.org/pipermail/svn-src-head/2018-October/119360.html
>
> Excellent.
>
> I looked at the patch.
>
> I understand how it creates and sends the RA with the flag.
>
> But I do not understand what the computer does when it receives the RA
> with the flag bit set.
>

Implementation specific. The goal is to stop hosts sending and receiving
IPv4 packets on the layer 2 media.

Linux and Windows have ways to manually disable IPv6, and since they both
provide the Sockets API, a similar technique could be used to disable IPv4
and make it unavailable to applications (i.e., error on Sockets API calls)

This draft could provide suggestions, but cannot be prescriptive because
that is IPv4 stack implementation specific.

Regards,
Mark.



> Alex
>
> >
> > I wish the discussions would be as short as the code changes that are
> > needed to implement a minimalistic set of this.
> >
> > Love and peace and no more IPv4 noise.
> >
> > /bz
> >
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