netdev - Re: [PATCH] udp: increment UDP_MIB

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Message-ID: <OFA39D9FC0.CDC6EE41-ON85257A8C.00458030-85257A8C.00461EF4@us.ibm.com>
Date:	Wed, 3 Oct 2012 08:45:55 -0400
From:	David Stevens <dlstevens@...ibm.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	chris2553@...glemail.com, Dave Jones <davej@...hat.com>,
	David Miller <davem@...emloft.net>, gpiez@....de,
	Julian Anastasov <ja@....bg>, netdev@...r.kernel.org,
	netdev-owner@...r.kernel.org
Subject: Re: [PATCH] udp: increment UDP_MIB_NOPORTS in mcast receive

netdev-owner@...r.kernel.org wrote on 10/03/2012 03:28:48 AM:
 
> BTW, it seems we dont properly increase UDP MIB counters when a
> multicast message is not delivered to at least one socket.

If an interface is in promiscuous mode or there are false
positives in a multicast address filter, wouldn't this count as
"drops" packets that were never intended for this machine?

I think an otherwise valid multicast or broadcast packet that doesn't
have a local receiver is not an error and shouldn't be counted.

                                                        +-DLS

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