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owipcalc: remove clone in cidr_contains6

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The "cidr_contains6" functions clones the given cidr. The contains4
does not clone the cidr. Both functions do not behave the same.

I see no reason to push the cidr. I think that we get only a negligible
performance gain, but it makes ipv4 and ipv6 equal again.

Signed-off-by: Nick Hainke <vincent@systemli.org>
This commit is contained in:
Nick Hainke 2021-01-16 13:48:50 +01:00 committed by Adrian Schmutzler
parent 38bdff29aa
commit 0fda8049a7
2 changed files with 5 additions and 6 deletions
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2
package/network/utils/owipcalc/Makefile
View File

@ -7,7 +7,7 @@
include $(TOPDIR)/rules.mk
PKG_NAME:=owipcalc
PKG_RELEASE:=4
PKG_RELEASE:=5
PKG_LICENSE:=Apache-2.0
include $(INCLUDE_DIR)/package.mk

9
package/network/utils/owipcalc/src/owipcalc.c
View File

@ -527,18 +527,17 @@ static bool cidr_network6(struct cidr *a)
static bool cidr_contains6(struct cidr *a, struct cidr *b)
{
struct cidr *n = cidr_clone(a);
struct in6_addr *x = &n->addr.v6;
struct in6_addr *x = &a->addr.v6;
struct in6_addr *y = &b->addr.v6;
uint8_t i = (128 - n->prefix) / 8;
uint8_t m = ~((1 << ((128 - n->prefix) % 8)) - 1);
uint8_t i = (128 - a->prefix) / 8;
uint8_t m = ~((1 << ((128 - a->prefix) % 8)) - 1);
uint8_t net1 = x->s6_addr[15-i] & m;
uint8_t net2 = y->s6_addr[15-i] & m;
if (printed)
qprintf(" ");
if ((b->prefix >= n->prefix) && (net1 == net2) &&
if ((b->prefix >= a->prefix) && (net1 == net2) &&
((i == 15) || !memcmp(&x->s6_addr, &y->s6_addr, 15-i)))
{
qprintf("1");