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Revert "lib: optimize apply_mask_ipv6()"

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Experience with IPv4 counterpart of this function suggests, that
this way of type-punning is likely to cause errors.
This commit is contained in:
Denis Ovsienko 2012-01-01 16:33:12 +04:00
parent 223da1a912
commit 8c7f49d277
1 changed files with 17 additions and 7 deletions
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24
lib/prefix.c
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@ -660,13 +660,23 @@ masklen2ip6 (const int masklen, struct in6_addr *netmask)
void void
apply_mask_ipv6 (struct prefix_ipv6 *p) apply_mask_ipv6 (struct prefix_ipv6 *p)
{ {
assert (p->prefixlen >= 0 && p->prefixlen <= IPV6_MAX_BITLEN); u_char *pnt;
u_int32_t *addr_word = (u_int32_t *) &p->prefix; int index;
u_int32_t *mask_word = (u_int32_t *) (maskbytes6 + p->prefixlen); int offset;
*addr_word++ &= *mask_word++;
*addr_word++ &= *mask_word++; index = p->prefixlen / 8;
*addr_word++ &= *mask_word++;
*addr_word &= *mask_word; if (index < 16)
{
pnt = (u_char *) &p->prefix;
offset = p->prefixlen % 8;
pnt[index] &= maskbit[offset];
index++;
while (index < 16)
pnt[index++] = 0;
}
} }
void void