diff options
| author | Felix Fietkau <nbd@nbd.name> | 2017-01-21 21:01:32 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-01-24 12:39:52 -0500 |
| commit | 6db6f0eae6052b70885562e1733896647ec1d807 (patch) | |
| tree | 765ba9108bf541141dc7daae83cc40a821eff032 /include/linux/if_bridge.h | |
| parent | 4548b683b78137f8eadeb312b94e20bb0d4a7141 (diff) | |
bridge: multicast to unicast
Implements an optional, per bridge port flag and feature to deliver
multicast packets to any host on the according port via unicast
individually. This is done by copying the packet per host and
changing the multicast destination MAC to a unicast one accordingly.
multicast-to-unicast works on top of the multicast snooping feature of
the bridge. Which means unicast copies are only delivered to hosts which
are interested in it and signalized this via IGMP/MLD reports
previously.
This feature is intended for interface types which have a more reliable
and/or efficient way to deliver unicast packets than broadcast ones
(e.g. wifi).
However, it should only be enabled on interfaces where no IGMPv2/MLDv1
report suppression takes place. This feature is disabled by default.
The initial patch and idea is from Felix Fietkau.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
[linus.luessing@c0d3.blue: various bug + style fixes, commit message]
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/if_bridge.h')
| -rw-r--r-- | include/linux/if_bridge.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/if_bridge.h b/include/linux/if_bridge.h index c6587c01d951..debc9d5904e5 100644 --- a/include/linux/if_bridge.h +++ b/include/linux/if_bridge.h @@ -46,6 +46,7 @@ struct br_ip_list { #define BR_LEARNING_SYNC BIT(9) #define BR_PROXYARP_WIFI BIT(10) #define BR_MCAST_FLOOD BIT(11) +#define BR_MULTICAST_TO_UNICAST BIT(12) #define BR_DEFAULT_AGEING_TIME (300 * HZ) |