Commit 24fc7b86 authored Dec 09, 2008 by Jan Sembera Committed by David S. Miller Dec 09, 2008

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>

parent fbf0229e

net/ipv6/ndisc.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -912,7 +912,12 @@ 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.
		*/
		if (skb->pkt_type != PACKET_LOOPBACK)
		ND_PRINTK1(KERN_WARNING
		"ICMPv6 NA: someone advertises our address on %s!\n",
		ifp->idev->dev->name);

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