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3 * Copyright (c) 2014 Mellanox Technologies, Ltd. All rights reserved.
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35 #ifndef _LINUX_ETHERDEVICE
36 #define _LINUX_ETHERDEVICE
38 #include <linux/types.h>
41 * is_zero_ether_addr - Determine if give Ethernet address is all zeros.
42 * @addr: Pointer to a six-byte array containing the Ethernet address
44 * Return true if the address is all zeroes.
46 static inline bool is_zero_ether_addr(const u8 *addr)
48 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
54 * is_multicast_ether_addr - Determine if the Ethernet address is a multicast.
55 * @addr: Pointer to a six-byte array containing the Ethernet address
57 * Return true if the address is a multicast address.
58 * By definition the broadcast address is also a multicast address.
60 static inline bool is_multicast_ether_addr(const u8 *addr)
62 return (0x01 & addr[0]);
66 * is_broadcast_ether_addr - Determine if the Ethernet address is broadcast
67 * @addr: Pointer to a six-byte array containing the Ethernet address
69 * Return true if the address is the broadcast address.
71 static inline bool is_broadcast_ether_addr(const u8 *addr)
73 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 0xff;
77 * is_valid_ether_addr - Determine if the given Ethernet address is valid
78 * @addr: Pointer to a six-byte array containing the Ethernet address
80 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
81 * a multicast address, and is not FF:FF:FF:FF:FF:FF.
83 * Return true if the address is valid.
85 static inline bool is_valid_ether_addr(const u8 *addr)
87 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
88 ** explicitly check for it here. */
89 return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr);
92 static inline void ether_addr_copy(u8 *dst, const u8 *src)
97 #endif /* _LINUX_ETHERDEVICE */