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| author | Linus Lüssing <linus.luessing@c0d3.blue> | 2019-01-21 07:26:27 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-01-22 17:18:08 -0800 |
| commit | 4effd28c1245303dce7fd290c501ac2c11052114 (patch) | |
| tree | 93942c9d3f41fc3e58de6ce99fbc03319ddaa17e /net/ipv6 | |
| parent | a2e2ca3bebe273055a212d754ffe4e0264192d74 (diff) | |
| download | linux-4effd28c1245303dce7fd290c501ac2c11052114.tar.gz linux-4effd28c1245303dce7fd290c501ac2c11052114.tar.bz2 linux-4effd28c1245303dce7fd290c501ac2c11052114.zip | |
bridge: join all-snoopers multicast address
Next to snooping IGMP/MLD queries RFC4541, section 2.1.1.a) recommends
to snoop multicast router advertisements to detect multicast routers.
Multicast router advertisements are sent to an "all-snoopers"
multicast address. To be able to receive them reliably, we need to
join this group.
Otherwise other snooping switches might refrain from forwarding these
advertisements to us.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/mcast.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c index 21f6deb2aec9..42f3f5cd349f 100644 --- a/net/ipv6/mcast.c +++ b/net/ipv6/mcast.c @@ -940,6 +940,7 @@ int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr) { return __ipv6_dev_mc_inc(dev, addr, MCAST_EXCLUDE); } +EXPORT_SYMBOL(ipv6_dev_mc_inc); /* * device multicast group del @@ -987,6 +988,7 @@ int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr) return err; } +EXPORT_SYMBOL(ipv6_dev_mc_dec); /* * check if the interface/address pair is valid |