packets: Add more utility functions for IPv4 and IPv6 addresses.

We had these functions scattered around the source tree anyway.  packets.h
is a good place to centralize them.

I do plan to introduce some additional callers.

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/util.h b/lib/util.h
index 1649c59c..5c8618d3 100644
--- a/lib/util.h
+++ b/lib/util.h
@@ -194,7 +194,8 @@ char *base_name(const char *file_name);
 char *abs_file_name(const char *dir, const char *file_name);
 
 void ignore(bool x OVS_UNUSED);
-int log_2_floor(uint32_t n);
+int log_2_floor(uint32_t);
+int ctz(uint32_t);
 
 #ifdef  __cplusplus
 }