net: core: use kernel's converter from hex to bin

Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 6 deletions

diff --git a/net/core/utils.c b/net/core/utils.c
index f41854470539..ec6bb322f372 100644
--- a/net/core/utils.c
+++ b/net/core/utils.c
@@ -92,18 +92,19 @@ EXPORT_SYMBOL(in_aton);
 
 static inline int xdigit2bin(char c, int delim)
 {
+        int val;
+
         if (c == delim || c == '\0')
                 return IN6PTON_DELIM;
         if (c == ':')
                 return IN6PTON_COLON_MASK;
         if (c == '.')
                 return IN6PTON_DOT;
-        if (c >= '0' && c <= '9')
-                return (IN6PTON_XDIGIT | IN6PTON_DIGIT| (c - '0'));
-        if (c >= 'a' && c <= 'f')
-                return (IN6PTON_XDIGIT | (c - 'a' + 10));
-        if (c >= 'A' && c <= 'F')
-                return (IN6PTON_XDIGIT | (c - 'A' + 10));
+
+        val = hex_to_bin(c);
+        if (val >= 0)
+                return val | IN6PTON_XDIGIT | (val < 10 ? IN6PTON_DIGIT : 0);
+
         if (delim == -1)
                 return IN6PTON_DELIM;
         return IN6PTON_UNKNOWN;