diff options
| author | YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org> | 2013-02-09 04:29:58 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-02-11 05:21:44 (GMT) |
| commit | ec16ef2228829698fdbd2f6b160ff52551a6bf8a (patch) | |
| tree | 2dc5a8441691c824ea3c4fc185af78b0757d1609 /net/ipv6/mcast.c | |
| parent | f45a5c267da35174e22cec955093a7513dc1623d (diff) | |
| download | linux-ec16ef2228829698fdbd2f6b160ff52551a6bf8a.tar.xz | |
ipv6 mcast: Do not join device multicast for interface-local multicasts.
RFC4291 (IPv6 addressing architecture) says that interface-Local scope
spans only a single interface on a node. We should not join L2 device
multicast list for addresses in interface-local (or smaller) scope.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/mcast.c')
| -rw-r--r-- | net/ipv6/mcast.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c index e5de4855..3a2849f 100644 --- a/net/ipv6/mcast.c +++ b/net/ipv6/mcast.c @@ -661,6 +661,10 @@ static void igmp6_group_added(struct ifmcaddr6 *mc) struct net_device *dev = mc->idev->dev; char buf[MAX_ADDR_LEN]; + if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < + IPV6_ADDR_SCOPE_LINKLOCAL) + return; + spin_lock_bh(&mc->mca_lock); if (!(mc->mca_flags&MAF_LOADED)) { mc->mca_flags |= MAF_LOADED; @@ -687,6 +691,10 @@ static void igmp6_group_dropped(struct ifmcaddr6 *mc) struct net_device *dev = mc->idev->dev; char buf[MAX_ADDR_LEN]; + if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < + IPV6_ADDR_SCOPE_LINKLOCAL) + return; + spin_lock_bh(&mc->mca_lock); if (mc->mca_flags&MAF_LOADED) { mc->mca_flags &= ~MAF_LOADED; |