netdev - Re: [PATCH] ipv4/ipv6: check hop limit field on input

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Date:	Tue, 02 Jun 2009 09:22:10 +0000
From:	John Dykstra <john.dykstra1@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	brian.haley@...com, dada1@...mosbay.com, nicolas.dichtel@...nd.com,
	fw@...len.de, netdev@...r.kernel.org
Subject: Re: [PATCH] ipv4/ipv6: check hop limit field on input

On Mon, 2009-06-01 at 19:02 -0700, David Miller wrote:
> And I even remember there are applications that use multicast and
> a hop limit of zero explicitly to keep application traffic only on
> the local subnet.  So any change like that proposed could break
> things.

Are you thinking of multicast apps that explicitly set a hop limit, or Multicast
Listener Discovery?  The hop limit specified for MLDv2 messages is one,
not zero.

  --  John

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