IPv6: Fix not join all-router mcast group when forwarding set.

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 <[email protected]> Signed-off-by: David S. Miller <[email protected]>
shanewfx · Mar 6, 2012 · d6ddef9 · d6ddef9
1 parent 34efc28
commit d6ddef9
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
@@ -434,6 +434,10 @@ static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
 	/* 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;
 }