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ipv6: Use universal hash for NDISC.

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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>
This commit is contained in:
David S. Miller
2011-12-28 15:06:58 -05:00
parent 32288eb4d9
commit 2c2aba6c56
7 changed files with 32 additions and 21 deletions
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13
net/ipv6/ndisc.c
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@@ -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)