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authorDavid S. Miller <davem@davemloft.net>2011-12-28 15:06:58 -0500
committerDavid S. Miller <davem@davemloft.net>2011-12-28 15:06:58 -0500
commit2c2aba6c561ac425602f4a0be61422224cb87151 (patch)
tree30b5f2c40b823ca61e2e0930d5e98a89a83222bb /net/ipv6
parent32288eb4d940b10e40c6d4178fe3a40d1437d2f8 (diff)
ipv6: Use universal hash for NDISC.
In order to perform a proper universal hash on a vector of integers, we have to use different universal hashes on each vector element. Which means we need 4 different hash randoms for ipv6. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/ndisc.c13
1 files changed, 3 insertions, 10 deletions
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index f3e50c29add..538a61960a2 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -93,7 +93,7 @@
static u32 ndisc_hash(const void *pkey,
const struct net_device *dev,
- __u32 rnd);
+ __u32 *hash_rnd);
static int ndisc_constructor(struct neighbour *neigh);
static void ndisc_solicit(struct neighbour *neigh, struct sk_buff *skb);
static void ndisc_error_report(struct neighbour *neigh, struct sk_buff *skb);
@@ -349,16 +349,9 @@ EXPORT_SYMBOL(ndisc_mc_map);
static u32 ndisc_hash(const void *pkey,
const struct net_device *dev,
- __u32 hash_rnd)
+ __u32 *hash_rnd)
{
- const u32 *p32 = pkey;
- u32 addr_hash, i;
-
- addr_hash = 0;
- for (i = 0; i < (sizeof(struct in6_addr) / sizeof(u32)); i++)
- addr_hash ^= *p32++;
-
- return jhash_2words(addr_hash, dev->ifindex, hash_rnd);
+ return ndisc_hashfn(pkey, dev, hash_rnd);
}
static int ndisc_constructor(struct neighbour *neigh)