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authorDaniel Walter <sahne@0x90.at>2011-04-13 21:09:25 +0000
committerDavid S. Miller <davem@davemloft.net>2011-04-15 15:43:55 -0700
commitbd015928bb1713691068c4d0d159afccbaf0f8c0 (patch)
tree816468bfbd16ba883175039853ced9a95d1f230f /net/ipv6/ndisc.c
parenteb8aa72d4e8756bde74d5f22bdd968ee6131069a (diff)
downloadop-kernel-dev-bd015928bb1713691068c4d0d159afccbaf0f8c0.zip
op-kernel-dev-bd015928bb1713691068c4d0d159afccbaf0f8c0.tar.gz
ipv6: ignore looped-back NA while dad is running
[ipv6] Ignore looped-back NAs while in Duplicate Address Detection If we send an unsolicited NA shortly after bringing up an IPv6 address, the duplicate address detection algorithm fails and the ip stays in tentative mode forever. This is due a missing check if the NA is looped-back to us. Signed-off-by: Daniel Walter <dwalter@barracuda.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ndisc.c')
-rw-r--r--net/ipv6/ndisc.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 92f952d..f057ff3 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -945,9 +945,10 @@ static void ndisc_recv_na(struct sk_buff *skb)
}
ifp = ipv6_get_ifaddr(dev_net(dev), &msg->target, dev, 1);
if (ifp) {
- if (ifp->flags & IFA_F_TENTATIVE) {
- addrconf_dad_failure(ifp);
- return;
+ if (skb->pkt_type != PACKET_LOOPBACK
+ && (ifp->flags & IFA_F_TENTATIVE)) {
+ addrconf_dad_failure(ifp);
+ return;
}
/* What should we make now? The advertisement
is invalid, but ndisc specs say nothing
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