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| author | David S. Miller <davem@davemloft.net> | 2012-01-26 21:22:32 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-01-26 21:22:32 +0100 |
| commit | 39232973b779ab0c02cb6dcd8f819b7cb0fcd09a (patch) | |
| tree | 02713ba159c04960e7b158c70e994b56c11ae20b /net/ipv4 | |
| parent | tcp: add LINUX_MIB_TCPRETRANSFAIL counter (diff) | |
| download | linux-39232973b779ab0c02cb6dcd8f819b7cb0fcd09a.tar.xz linux-39232973b779ab0c02cb6dcd8f819b7cb0fcd09a.zip | |
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')
| -rw-r--r-- | net/ipv4/route.c | 5 |
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) |