From c6cb2d9151fc14f9c2b1b7618695874cc8d97286 Mon Sep 17 00:00:00 2001 From: Denis Ovsienko Date: Tue, 18 Oct 2011 22:02:52 +0400 Subject: lib: optimize apply_mask_ipv6() --- lib/prefix.c | 24 +++++++----------------- 1 file changed, 7 insertions(+), 17 deletions(-) (limited to 'lib/prefix.c') diff --git a/lib/prefix.c b/lib/prefix.c index 1ddbbbe7..c8fd0bd8 100644 --- a/lib/prefix.c +++ b/lib/prefix.c @@ -660,23 +660,13 @@ masklen2ip6 (const int masklen, struct in6_addr *netmask) void apply_mask_ipv6 (struct prefix_ipv6 *p) { - u_char *pnt; - int index; - int offset; - - index = p->prefixlen / 8; - - if (index < 16) - { - pnt = (u_char *) &p->prefix; - offset = p->prefixlen % 8; - - pnt[index] &= maskbit[offset]; - index++; - - while (index < 16) - pnt[index++] = 0; - } + assert (p->prefixlen >= 0 && p->prefixlen <= IPV6_MAX_BITLEN); + u_int32_t *addr_word = (u_int32_t *) &p->prefix; + u_int32_t *mask_word = (u_int32_t *) (maskbytes6 + p->prefixlen); + *addr_word++ &= *mask_word++; + *addr_word++ &= *mask_word++; + *addr_word++ &= *mask_word++; + *addr_word &= *mask_word; } void -- cgit v1.2.1