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netfilter: ip6t_NPT: Use csum_partial()

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[ Some fixes went into mainstream before this patch, so I needed
  to rebase it upon the current tree, that's why it's different from
  the original one posted on the list --pablo ]

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
YOSHIFUJI Hideaki 2013-03-15 10:51:58 +01:00 committed by Pablo Neira Ayuso
parent 1e32b0c65c
commit 2d2fd8c50a
1 changed files with 3 additions and 8 deletions
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11
net/ipv6/netfilter/ip6t_NPT.c
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@ -18,9 +18,8 @@
static int ip6t_npt_checkentry(const struct xt_tgchk_param *par)
{
struct ip6t_npt_tginfo *npt = par->targinfo;
__wsum src_sum = 0, dst_sum = 0;
struct in6_addr pfx;
unsigned int i;
__wsum src_sum, dst_sum;
if (npt->src_pfx_len > 64 || npt->dst_pfx_len > 64)
return -EINVAL;
@ -33,12 +32,8 @@ static int ip6t_npt_checkentry(const struct xt_tgchk_param *par)
if (!ipv6_addr_equal(&pfx, &npt->dst_pfx.in6))
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(npt->src_pfx.in6.s6_addr16); i++) {
src_sum = csum_add(src_sum,
(__force __wsum)npt->src_pfx.in6.s6_addr16[i]);
dst_sum = csum_add(dst_sum,
(__force __wsum)npt->dst_pfx.in6.s6_addr16[i]);
}
src_sum = csum_partial(&npt->src_pfx.in6, sizeof(npt->src_pfx.in6), 0);
dst_sum = csum_partial(&npt->dst_pfx.in6, sizeof(npt->dst_pfx.in6), 0);
npt->adjustment = ~csum_fold(csum_sub(src_sum, dst_sum));
return 0;