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authorMike Frysinger <vapier@gentoo.org>2009-01-27 16:53:39 -0500
committerBen Warren <biggerbadderben@gmail.com>2009-01-28 23:59:27 -0800
commit75edebe3011c963a7cd84be0f4a987477f2aaf89 (patch)
tree4be18e8688583de34f9d5b868c7d960678ea33f1 /include
parent268859338c0188eab1d0d3b867b7dad3c5cc734a (diff)
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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>
Diffstat (limited to 'include')
-rw-r--r--include/net.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/net.h b/include/net.h
index d2d394f..bbe0d4b 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);