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authorDavid S. Miller <davem@davemloft.net>2012-01-26 15:22:32 -0500
committerDavid S. Miller <davem@davemloft.net>2012-01-26 15:22:32 -0500
commit39232973b779ab0c02cb6dcd8f819b7cb0fcd09a (patch)
tree02713ba159c04960e7b158c70e994b56c11ae20b /net/ipv4/route.c
parent09e9b813d34d9a09d64a64580a9959d8bae1f4f5 (diff)
ipv4/ipv6: Prepare for new route gateway semantics.
In the future the ipv4/ipv6 route gateway will take on two types of values: 1) INADDR_ANY/IN6ADDR_ANY, for local network routes, and in this case the neighbour must be obtained using the destination address in ipv4/ipv6 header as the lookup key. 2) Everything else, the actual nexthop route address. So if the gateway is not inaddr-any we use it, otherwise we must use the packet's destination address. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/route.c')
-rw-r--r--net/ipv4/route.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index bcacf54e5418..4eeb8ce856e2 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1117,10 +1117,15 @@ static struct neighbour *ipv4_neigh_lookup(const struct dst_entry *dst, const vo
static const __be32 inaddr_any = 0;
struct net_device *dev = dst->dev;
const __be32 *pkey = daddr;
+ const struct rtable *rt;
struct neighbour *n;
+ rt = (const struct rtable *) dst;
+
if (dev->flags & (IFF_LOOPBACK | IFF_POINTOPOINT))
pkey = &inaddr_any;
+ else if (rt->rt_gateway)
+ pkey = (const __be32 *) &rt->rt_gateway;
n = __ipv4_neigh_lookup(&arp_tbl, dev, *(__force u32 *)pkey);
if (n)