net: Add optional SKB arg to dst_ops->neigh_lookup().
Causes the handler to use the daddr in the ipv4/ipv6 header when
the route gateway is unspecified (local subnet).
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index bae3638..7453dfc 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -188,7 +188,9 @@
return p;
}
-static struct neighbour *ipv4_neigh_lookup(const struct dst_entry *dst, const void *daddr);
+static struct neighbour *ipv4_neigh_lookup(const struct dst_entry *dst,
+ struct sk_buff *skb,
+ const void *daddr);
static struct dst_ops ipv4_dst_ops = {
.family = AF_INET,
@@ -1088,7 +1090,9 @@
return length >> FRACT_BITS;
}
-static struct neighbour *ipv4_neigh_lookup(const struct dst_entry *dst, const void *daddr)
+static struct neighbour *ipv4_neigh_lookup(const struct dst_entry *dst,
+ struct sk_buff *skb,
+ const void *daddr)
{
struct net_device *dev = dst->dev;
const __be32 *pkey = daddr;
@@ -1098,6 +1102,8 @@
rt = (const struct rtable *) dst;
if (rt->rt_gateway)
pkey = (const __be32 *) &rt->rt_gateway;
+ else if (skb)
+ pkey = &ip_hdr(skb)->daddr;
n = __ipv4_neigh_lookup(dev, *(__force u32 *)pkey);
if (n)
@@ -1107,7 +1113,7 @@
static int rt_bind_neighbour(struct rtable *rt)
{
- struct neighbour *n = ipv4_neigh_lookup(&rt->dst, &rt->rt_gateway);
+ struct neighbour *n = ipv4_neigh_lookup(&rt->dst, NULL, &rt->rt_gateway);
if (IS_ERR(n))
return PTR_ERR(n);
dst_set_neighbour(&rt->dst, n);
@@ -1388,7 +1394,7 @@
rt->rt_gateway = peer->redirect_learned.a4;
- n = ipv4_neigh_lookup(&rt->dst, &rt->rt_gateway);
+ n = ipv4_neigh_lookup(&rt->dst, NULL, &rt->rt_gateway);
if (IS_ERR(n)) {
rt->rt_gateway = orig_gw;
return;