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author | David S. Miller <davem@davemloft.net> | 2012-01-26 20:22:32 (GMT) |
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committer | David S. Miller <davem@davemloft.net> | 2012-01-26 20:22:32 (GMT) |
commit | 39232973b779ab0c02cb6dcd8f819b7cb0fcd09a (patch) | |
tree | 02713ba159c04960e7b158c70e994b56c11ae20b /net/ipv6 | |
parent | 09e9b813d34d9a09d64a64580a9959d8bae1f4f5 (diff) | |
download | linux-fsl-qoriq-39232973b779ab0c02cb6dcd8f819b7cb0fcd09a.tar.xz |
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/ipv6')
-rw-r--r-- | net/ipv6/route.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 8c2e3ab..7d7f306 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -121,9 +121,23 @@ static u32 *ipv6_cow_metrics(struct dst_entry *dst, unsigned long old) return p; } +static inline const void *choose_neigh_daddr(struct rt6_info *rt, const void *daddr) +{ + struct in6_addr *p = &rt->rt6i_gateway; + + if (p->s6_addr32[0] | p->s6_addr32[1] | + p->s6_addr32[2] | p->s6_addr32[3]) + return (const void *) p; + return daddr; +} + static struct neighbour *ip6_neigh_lookup(const struct dst_entry *dst, const void *daddr) { - struct neighbour *n = __ipv6_neigh_lookup(&nd_tbl, dst->dev, daddr); + struct rt6_info *rt = (struct rt6_info *) dst; + struct neighbour *n; + + daddr = choose_neigh_daddr(rt, daddr); + n = __ipv6_neigh_lookup(&nd_tbl, dst->dev, daddr); if (n) return n; return neigh_create(&nd_tbl, daddr, dst->dev); |