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bridge: add export of multicast database adjacent to net_dev

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With this new, exported function br_multicast_list_adjacent(net_dev) a
list of IPv4/6 addresses is returned. This list contains all multicast
addresses sensed by the bridge multicast snooping feature on all bridge
ports of the bridge interface of net_dev, excluding addresses from the
specified net_device itself.

Adding bridge support to the batman-adv multicast optimization requires
batman-adv knowing about the existence of bridged-in multicast
listeners to be able to reliably serve them with multicast packets.

Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Linus Lüssing
2014-06-07 18:26:28 +02:00
committed by David S. Miller
parent dc4eb53a99
commit 07f8ac4a1e
3 changed files with 76 additions and 12 deletions
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18
include/linux/if_bridge.h
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@@ -16,9 +16,27 @@
#include <linux/netdevice.h>
#include <uapi/linux/if_bridge.h>
struct br_ip {
union {
__be32 ip4;
#if IS_ENABLED(CONFIG_IPV6)
struct in6_addr ip6;
#endif
} u;
__be16 proto;
__u16 vid;
};
struct br_ip_list {
struct list_head list;
struct br_ip addr;
};
extern void brioctl_set(int (*ioctl_hook)(struct net *, unsigned int, void __user *));
typedef int br_should_route_hook_t(struct sk_buff *skb);
extern br_should_route_hook_t __rcu *br_should_route_hook;
int br_multicast_list_adjacent(struct net_device *dev,
struct list_head *br_ip_list);
#endif