commit 1d8ab8d3c176d31530b3ffd4547cf731018e2a45
author Linus Lüssing <linus.luessing@web.de> Sat Feb 15 17:47:52 2014 +0100
committer Antonio Quartulli <antonio@meshcoding.com> Sat Mar 22 09:18:57 2014 +0100
tree b62208972cdfb70a853ff5177c29154fd165bea7
parent 60432d756cf06e597ef9da511402dd059b112447

batman-adv: Modified forwarding behaviour for multicast packets

With this patch a multicast packet is not always simply flooded anymore,
the behaviour for the following cases is changed to reduce
unnecessary overhead:

If all nodes within the horizon of a certain node have signalized
multicast listener announcement capability then an IPv6 multicast packet
with a destination of IPv6 link-local scope (excluding ff02::1) coming
from the upstream of this node...

* ...is dropped if there is no according multicast listener in the
  translation table,
* ...is forwarded via unicast if there is a single node with interested
  multicast listeners
* ...and otherwise still gets flooded.

Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>