diff options
| author | Timo Teräs <timo.teras@iki.fi> | 2011-03-29 02:40:53 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-03-30 11:10:47 +0400 |
| commit | 93ca3bb5df9bc8b2c60485e1cc6507c3d7c8e1fa (patch) | |
| tree | 6ccf21f8d1e4431c6be79c265fb1f9a722308f63 /net/ipv4 | |
| parent | 1459a3cc51d90d78027c7b5c1790e5d22751c8eb (diff) | |
| download | linux-93ca3bb5df9bc8b2c60485e1cc6507c3d7c8e1fa.tar.xz | |
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/ipv4')
| -rw-r--r-- | net/ipv4/arp.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c index 090d273d7865..1b74d3b64371 100644 --- a/net/ipv4/arp.c +++ b/net/ipv4/arp.c @@ -215,6 +215,9 @@ int arp_mc_map(__be32 addr, u8 *haddr, struct net_device *dev, int dir) case ARPHRD_INFINIBAND: ip_ib_mc_map(addr, dev->broadcast, haddr); return 0; + case ARPHRD_IPGRE: + ip_ipgre_mc_map(addr, dev->broadcast, haddr); + return 0; default: if (dir) { memcpy(haddr, dev->broadcast, dev->addr_len); |