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| author |   Andreas Schultz <andreas.schultz@travelping.com> | 2020-05-12 14:41:16 +0200 |
|---|---|---|
| committer |   Florin Coras <florin.coras@gmail.com> | 2020-06-01 15:41:08 +0000 |
| commit | 3b519b38b0df186f424d2ff2f5e8015408d67c53 (patch) | |
| tree | 3d7bef0fddadfe9de95b16d09776439a0a150790 /src/vnet | |
| parent | 63c672c440d92cc570c587254afb4167617ec0b7 (diff) | |
ip: fix IPv6 mask to prefix length conversion
make sure we don't pass a 0 (zero) to log2.
Type: fix
Signed-off-by: Andreas Schultz <andreas.schultz@travelping.com>
Change-Id: Ib3386ad4686835d3836f48294cee4058e897847a
Diffstat (limited to 'src/vnet')
| -rw-r--r-- | src/vnet/ip/ip_types.c | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/src/vnet/ip/ip_types.c b/src/vnet/ip/ip_types.c index cd08c5417ad..5041c129245 100644 --- a/src/vnet/ip/ip_types.c +++ b/src/vnet/ip/ip_types.c @@ -511,16 +511,11 @@ ip6_prefix_max_address_host_order (ip6_address_t * ip, u8 plen, u32 ip6_mask_to_preflen (ip6_address_t * mask) { - u8 first1, first0; - if (mask->as_u64[0] == 0 && mask->as_u64[1] == 0) - return 0; - first1 = log2_first_set (clib_net_to_host_u64 (mask->as_u64[1])); - first0 = log2_first_set (clib_net_to_host_u64 (mask->as_u64[0])); - - if (first1 != 0) - return 128 - first1; - else - return 64 - first0; + if (mask->as_u64[1] != 0) + return 128 - log2_first_set (clib_net_to_host_u64 (mask->as_u64[1])); + if (mask->as_u64[0] != 0) + return 64 - log2_first_set (clib_net_to_host_u64 (mask->as_u64[0])); + return 0; } /* |