We already have multicast-to-unicast support between client and node.
And batman-adv has multicast-to-unicast conversion capabilities if there
is only one receiver. Now this patchset adds node-to-node
multicast-to-unicast support to multiple targets as well.
This should save airtime for ICMPv6 Router Solicitations, for instance.
Here we have multiple targets for the same IPv6 multicast destination
address. However, the number of destination nodes is still rather small
in this case, i.e. all gateways, making multiple unicast transmissions
less costly than flooding a packet through the whole mesh.
Also, this allows playing with multicast streaming to a limited set of
destination nodes (default setting: 16).
Also, nearly all nodes should be running a batman-adv version which
was compiled with CONFIG_BATMAN_ADV_MCAST=y (e.g. Gluon v2018.1 or
later) for this feature to take effect.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
