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))
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);