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IPv6: Fix net_ipv6_pref2mask()

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Signed-off-by: Masayuki Ishikawa <masayuki.ishikawa@gmail.com>
This commit is contained in:
Masayuki Ishikawa 2017-05-18 09:22:33 +09:00
parent f10e10e465
commit 980b17d951
1 changed files with 4 additions and 4 deletions
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8
net/utils/net_ipv6_pref2mask.c
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@ -82,7 +82,7 @@ void net_ipv6_pref2mask(uint8_t preflen, net_ipv6addr_t mask)
* 1..6 7..2 3..8 9..4 5..0 1..6 7..2 3..8
*/
for (i = 0; i < 7; i++)
for (i = 0; i < 8; i++)
{
/* bit = {0, 16, 32, 48, 64, 80, 96, 112} */
@ -92,7 +92,7 @@ void net_ipv6_pref2mask(uint8_t preflen, net_ipv6addr_t mask)
{
/* Eg. preflen = 38, bit = {0, 16, 32} */
if (preflen > (bit + 16))
if (preflen >= (bit + 16))
{
/* Eg. preflen = 38, bit = {0, 16} */
@ -102,7 +102,7 @@ void net_ipv6_pref2mask(uint8_t preflen, net_ipv6addr_t mask)
{
/* Eg. preflen = 38, bit = {32}
* bit - preflen = 6
* make = 0xffff << (16-6)
* mask = 0xffff << (16-6)
* = 0xfc00
*/
@ -111,7 +111,7 @@ void net_ipv6_pref2mask(uint8_t preflen, net_ipv6addr_t mask)
}
else
{
/* Eg. preflen=38, bit= {48, 64, 80, 112} */
/* Eg. preflen=38, bit= {48, 64, 80, 96, 112} */
mask[i] = 0x0000;
}