netdev - Re: [PATCH net-next 2/3] ipv6: mld: do not overwrite uri when receiving an mldv2 query

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Date:	Fri, 26 Sep 2014 08:13:41 -0400
From:	David L Stevens <david.stevens@...cle.com>
To:	Daniel Borkmann <dborkman@...hat.com>
CC:	davem@...emloft.net, hannes@...essinduktion.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH net-next 2/3] ipv6: mld: do not overwrite uri when receiving
 an mldv2 query



On 09/26/2014 05:29 AM, Daniel Borkmann wrote:
> On 09/26/2014 01:23 AM, David L Stevens wrote:

> I'm fine with either suggestion. Actually the _current_ situation we're in is
> that in IPv4 we _always_ use the current, uncached _sysctl_ tuned setting of URI
> (independent of any protocol version); while in IPv6 we use the _cached_ sysctl
> URI in case of MLDv1 and _always_ overwrite the URI in case of MLDv2 (even for
> MLDv1). Are you suggesting that, we then better adapt using the maxdelay value
> everywhere and adapt URI to it, plus having a boolean knob defaulting to off for
> an admin to enforce always using the provided sysctl default setting and not
> the snooped MLD?

Yes.

Definitely, IGMP and MLD, all versions, should do the same thing and I think that
ought to use the querier MRC, if present and not overridden by an admin.

Further, I think a version switch or failure to hear from a querier for qrv*qi
ought to reset everything.
								+-DLS

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