1 files changed, 25 insertions, 0 deletions

diff --git a/net/core/utils.c b/net/core/utils.c
index 5fea0ab21902..386e263f6066 100644
--- a/net/core/utils.c
+++ b/net/core/utils.c
@@ -27,6 +27,7 @@
 #include <linux/ratelimit.h>
 
 #include <net/sock.h>
+#include <net/net_ratelimit.h>
 
 #include <asm/byteorder.h>
 #include <asm/system.h>
@@ -296,3 +297,27 @@ void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb,
                                 csum_unfold(*sum)));
 }
 EXPORT_SYMBOL(inet_proto_csum_replace4);
+
+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 (!strchr("0123456789abcdefABCDEF", s[i * 3]))
+                        return 0;
+                if (!strchr("0123456789abcdefABCDEF", 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);