X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=include%2Fnet.h;h=bbe0d4b5a2dfe4b001f00b3b8e62d86923372ca1;hb=c50a6031670a90f799835db7bc1638a3e2a9f1f0;hp=a5a256bcd083b82780ea52570d09b893a2af74f2;hpb=6d0f6bcf337c5261c08fabe12982178c2c489d76;p=oweals%2Fu-boot.git

diff --git a/include/net.h b/include/net.h
index a5a256bcd0..bbe0d4b5a2 100644
--- a/include/net.h
+++ b/include/net.h
@@ -200,6 +200,12 @@ typedef struct {
 	ushort		udp_xsum;	/* Checksum			*/
 } IP_t;
 
+#define IP_OFFS		0x1fff /* ip offset *= 8 */
+#define IP_FLAGS	0xe000 /* first 3 bits */
+#define IP_FLAGS_RES	0x8000 /* reserved */
+#define IP_FLAGS_DFRAG	0x4000 /* don't fragments */
+#define IP_FLAGS_MFRAG	0x2000 /* more fragments */
+
 #define IP_HDR_SIZE_NO_UDP	(sizeof (IP_t) - 8)
 #define IP_HDR_SIZE		(sizeof (IP_t))
 
@@ -468,6 +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);