summaryrefslogtreecommitdiff
path: root/net/ipv6/ndisc.c
diff options
context:
space:
mode:
authorTimo Teräs <timo.teras@iki.fi>2011-03-28 22:40:53 +0000
committerDavid S. Miller <davem@davemloft.net>2011-03-30 00:10:47 -0700
commit93ca3bb5df9bc8b2c60485e1cc6507c3d7c8e1fa (patch)
tree6ccf21f8d1e4431c6be79c265fb1f9a722308f63 /net/ipv6/ndisc.c
parent1459a3cc51d90d78027c7b5c1790e5d22751c8eb (diff)
net: gre: provide multicast mappings for ipv4 and ipv6
My commit 6d55cb91a0020ac0 (gre: fix hard header destination address checking) broke multicast. The reason is that ip_gre used to get ipgre_header() calls with zero destination if we have NOARP or multicast destination. Instead the actual target was decided at ipgre_tunnel_xmit() time based on per-protocol dissection. Instead of allowing the "abuse" of ->header() calls with invalid destination, this creates multicast mappings for ip_gre. This also fixes "ip neigh show nud noarp" to display the proper multicast mappings used by the gre device. Reported-by: Doug Kehn <rdkehn@yahoo.com> Signed-off-by: Timo Teräs <timo.teras@iki.fi> Acked-by: Doug Kehn <rdkehn@yahoo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ndisc.c')
-rw-r--r--net/ipv6/ndisc.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 0e49c9db3c98..92f952d093db 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -341,6 +341,8 @@ int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int d
case ARPHRD_INFINIBAND:
ipv6_ib_mc_map(addr, dev->broadcast, buf);
return 0;
+ case ARPHRD_IPGRE:
+ return ipv6_ipgre_mc_map(addr, dev->broadcast, buf);
default:
if (dir) {
memcpy(buf, dev->broadcast, dev->addr_len);