[ 26/41] IPv6: Fix not join all-router mcast group when forwarding set.

From: Greg KH
Date: Fri Mar 16 2012 - 19:45:13 EST


3.2-stable review patch. If anyone has any objections, please let me know.

------------------


From: Li Wei <lw@xxxxxxxxxxxxxx>

[ Upstream commit d6ddef9e641d1229d4ec841dc75ae703171c3e92 ]

When forwarding was set and a new net device is register,
we need add this device to the all-router mcast group.

Signed-off-by: Li Wei <lw@xxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/ipv6/addrconf.c | 4 ++++
1 file changed, 4 insertions(+)

--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -434,6 +434,10 @@ static struct inet6_dev * ipv6_add_dev(s
/* Join all-node multicast group */
ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);

+ /* Join all-router multicast group if forwarding is set */
+ if (ndev->cnf.forwarding && dev && (dev->flags & IFF_MULTICAST))
+ ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
+
return ndev;
}



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