Move is_valid_ether_addr() to include/net.h

Import the is_valid_ether_addr() function from the Linux kernel.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/include/net.h b/include/net.h
index d2d394f0d..bbe0d4b5a 100644
--- a/include/net.h
+++ b/include/net.h
@@ -474,6 +474,22 @@ static inline int is_multicast_ether_addr(const u8 *addr)
 	return (0x01 & addr[0]);
 }
 
+/**
+ * is_valid_ether_addr - Determine if the given Ethernet address is valid
+ * @addr: Pointer to a six-byte array containing the Ethernet address
+ *
+ * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
+ * a multicast address, and is not FF:FF:FF:FF:FF:FF.
+ *
+ * Return true if the address is valid.
+ */
+static inline int is_valid_ether_addr(const u8 * addr)
+{
+	/* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
+	 * explicitly check for it here. */
+	return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr);
+}
+
 /* Convert an IP address to a string */
 extern void	ip_to_string (IPaddr_t x, char *s);