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ipv6: silence log messages for locally generated multicast 

This patch fixes minor annoyance during transmission of unsolicited
neighbor advertisements from userspace to multicast addresses (as
far as I can see in RFC, this is allowed and the similar functionality
for IPv4 has been in arping for a long time).

Outgoing multicast packets get reinserted into local processing as if they
are received from the network. The machine thus sees its own NA and fills
the logs with error messages. This patch removes the message if NA has been
generated locally.

Signed-off-by: Jan Sembera <jsembera@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jan Sembera 2008-12-09 15:48:32 -08:00 committed by David S. Miller
parent fbf0229e94
commit 24fc7b86dc
1 changed files with 6 additions and 1 deletions
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7
net/ipv6/ndisc.c
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@ -912,8 +912,13 @@ static void ndisc_recv_na(struct sk_buff *skb)
is invalid, but ndisc specs say nothing
about it. It could be misconfiguration, or
an smart proxy agent tries to help us :-)
We should not print the error if NA has been
received from loopback - it is just our own
unsolicited advertisement.
*/
ND_PRINTK1(KERN_WARNING
if (skb->pkt_type != PACKET_LOOPBACK)
ND_PRINTK1(KERN_WARNING
"ICMPv6 NA: someone advertises our address on %s!\n",
ifp->idev->dev->name);
in6_ifa_put(ifp);