net: core: move mac_pton() to lib/net_utils.c

[~andy/linux] / lib / net_utils.c

diff --git a/lib/net_utils.c b/lib/net_utils.c
new file mode 100644 (file)
index 0000000..2e3c52c
--- /dev/null
+++ b/lib/net_utils.c
@@ -0,0 +1,26 @@
+#include <linux/string.h>
+#include <linux/if_ether.h>
+#include <linux/ctype.h>
+#include <linux/kernel.h>
+
+int mac_pton(const char *s, u8 *mac)
+{
+       int i;
+
+       /* XX:XX:XX:XX:XX:XX */
+       if (strlen(s) < 3 * ETH_ALEN - 1)
+               return 0;
+
+       /* Don't dirty result unless string is valid MAC. */
+       for (i = 0; i < ETH_ALEN; i++) {
+               if (!isxdigit(s[i * 3]) || !isxdigit(s[i * 3 + 1]))
+                       return 0;
+               if (i != ETH_ALEN - 1 && s[i * 3 + 2] != ':')
+                       return 0;
+       }
+       for (i = 0; i < ETH_ALEN; i++) {
+               mac[i] = (hex_to_bin(s[i * 3]) << 4) | hex_to_bin(s[i * 3 + 1]);
+       }
+       return 1;
+}
+EXPORT_SYMBOL(mac_pton);