diff options
Diffstat (limited to 'include/linux/etherdevice.h')
| -rw-r--r-- | include/linux/etherdevice.h | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h index cc84934f9059..5f49a30eb6f2 100644 --- a/include/linux/etherdevice.h +++ b/include/linux/etherdevice.h @@ -48,8 +48,10 @@ static inline void eth_copy_and_sum (struct sk_buff *dest, } /** - * is_zero_ether_addr - Determine if give Ethernet address is all - * zeros. + * is_zero_ether_addr - Determine if give Ethernet address is all zeros. + * @addr: Pointer to a six-byte array containing the Ethernet address + * + * Return true if the address is all zeroes. */ static inline int is_zero_ether_addr(const u8 *addr) { @@ -57,9 +59,7 @@ static inline int is_zero_ether_addr(const u8 *addr) } /** - * is_multicast_ether_addr - Determine if the given Ethernet address is a - * multicast address. - * + * is_multicast_ether_addr - Determine if the Ethernet address is a multicast. * @addr: Pointer to a six-byte array containing the Ethernet address * * Return true if the address is a multicast address. @@ -69,10 +69,15 @@ static inline int is_multicast_ether_addr(const u8 *addr) return ((addr[0] != 0xff) && (0x01 & addr[0])); } +/** + * is_broadcast_ether_addr - Determine if the Ethernet address is broadcast + * @addr: Pointer to a six-byte array containing the Ethernet address + * + * Return true if the address is the broadcast address. + */ static inline int is_broadcast_ether_addr(const u8 *addr) { - return ((addr[0] == 0xff) && (addr[1] == 0xff) && (addr[2] == 0xff) && - (addr[3] == 0xff) && (addr[4] == 0xff) && (addr[5] == 0xff)); + return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 0xff; } /** @@ -108,14 +113,14 @@ static inline void random_ether_addr(u8 *addr) /** * compare_ether_addr - Compare two Ethernet addresses * @addr1: Pointer to a six-byte array containing the Ethernet address - * @addr2 Pointer other six-byte array containing the Ethernet address + * @addr2: Pointer other six-byte array containing the Ethernet address * * Compare two ethernet addresses, returns 0 if equal */ -static inline unsigned compare_ether_addr(const u8 *_a, const u8 *_b) +static inline unsigned compare_ether_addr(const u8 *addr1, const u8 *addr2) { - const u16 *a = (const u16 *) _a; - const u16 *b = (const u16 *) _b; + const u16 *a = (const u16 *) addr1; + const u16 *b = (const u16 *) addr2; BUILD_BUG_ON(ETH_ALEN != 6); return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2])) != 0; |