batman-adv: mcast: avoid redundant multicast TT entries with bridges

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When a bridge is added on top of bat0 we set the WANT_ALL_UNSNOOPABLES
flag. Which means we sign up for all traffic for ff02::1/128 and
224.0.0.0/24.

When the node itself had IPv6 enabled or joined a group in 224.0.0.0/24
itself then so far this would result in a multicast TT entry which is
redundant to the WANT_ALL_UNSNOOPABLES.

With this patch such redundant TT entries are avoided.

Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>

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Linus Lüssing 2019-05-26 18:35:50 +02:00 • committed by Simon Wunderlich

parent 5c506802ca

commit 390dcd48cd

1 changed files with 27 additions and 6 deletions

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net/batman-adv/multicast.c

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