netdev - Re: [PATCH net-next] bridge: multicast to unicast

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Date:   Fri, 6 Jan 2017 14:54:55 +0100
From:   Felix Fietkau <nbd@....name>
To:     Johannes Berg <johannes@...solutions.net>,
        Linus Lüssing <linus.luessing@...3.blue>,
        netdev@...r.kernel.org
Cc:     "David S . Miller" <davem@...emloft.net>,
        Stephen Hemminger <stephen@...workplumber.org>,
        bridge@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        linux-wireless@...r.kernel.org,
        Michael Braun <michael-dev@...i-braun.de>
Subject: Re: [PATCH net-next] bridge: multicast to unicast

On 2017-01-06 14:54, Johannes Berg wrote:
> 
>> The bridge layer can use IGMP snooping to ensure that the multicast
>> stream is only transmitted to clients that are actually a member of
>> the group. Can the mac80211 feature do the same?
> 
> No, it'll convert the packet for all clients that are behind that
> netdev. But that's an argument for dropping the mac80211 feature, which
> hasn't been merged upstream yet, no?
Right.

- Felix