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 18:39:52 +0100 |
| commit | 6db6f0eae6052b70885562e1733896647ec1d807 (patch) | |
| tree | 765ba9108bf541141dc7daae83cc40a821eff032 /net/bridge/br_private.h | |
| parent | Introduce a sysctl that modifies the value of PROT_SOCK. (diff) | |
| download | linux-6db6f0eae6052b70885562e1733896647ec1d807.tar.xz linux-6db6f0eae6052b70885562e1733896647ec1d807.zip | |
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 'net/bridge/br_private.h')
| -rw-r--r-- | net/bridge/br_private.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 8ce621e8345c..0b82a227fc34 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -177,6 +177,7 @@ struct net_bridge_port_group { struct timer_list timer; struct br_ip addr; unsigned char flags; + unsigned char eth_addr[ETH_ALEN]; }; struct net_bridge_mdb_entry @@ -599,7 +600,7 @@ void br_multicast_free_pg(struct rcu_head *head); struct net_bridge_port_group * br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, struct net_bridge_port_group __rcu *next, - unsigned char flags); + unsigned char flags, const unsigned char *src); void br_mdb_init(void); void br_mdb_uninit(void); void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, |