From mboxrd@z Thu Jan  1 00:00:00 1970
From: Johannes Berg <johannes@sipsolutions.net>
Subject: Re: [PATCH net-next] bridge: multicast to unicast
Date: Fri, 06 Jan 2017 14:54:01 +0100
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> 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?

johannes