netdev - Re: [PATCH] IGMP: Inhibit reports for local multicast groups

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20150813160626.GF32484@lunn.ch>
Date:	Thu, 13 Aug 2015 18:06:26 +0200
From:	Andrew Lunn <andrew@...n.ch>
To:	Philip Downey <pdowney@...cade.com>
Cc:	David Miller <davem@...emloft.net>,
	"kuznet@....inr.ac.ru" <kuznet@....inr.ac.ru>,
	"jmorris@...ei.org" <jmorris@...ei.org>,
	"yoshfuji@...ux-ipv6.org" <yoshfuji@...ux-ipv6.org>,
	"kaber@...sh.net" <kaber@...sh.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH] IGMP: Inhibit reports for local multicast groups

On Thu, Aug 13, 2015 at 02:48:23PM +0000, Philip Downey wrote:
> Hi David
> Thanks for taking the time to review and comment.
> This is my first upstream request so please forgive any ignorance on my part.   I have added a new proposed commit wording below with a view to agreeing the content before resubmitting the patch.
> I hope it is sufficient to address your concerns.
> 
>    IGMP: Inhibit reports for local multicast groups
>     
>     The range of addresses between 224.0.0.0 and 224.0.0.255
>     inclusive, is reserved for the use of routing protocols and other
>     low-level topology discovery or maintenance protocols, such as
>     gateway discovery and group membership reporting.  Multicast
>     routers should not forward any multicast datagram with   destination
>     addresses in this range, regardless of its TTL.
> 
>     Currently, IGMP reports are generated for this reserved range of
>     addresses even though a router will ignore this information since
>     it has no purpose.

Hi Philip

What about switches which are doing IGMP snooping?

     Andrew
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html