luban-lite/bsp/peripheral/wireless/hugeic/include/linux/etherdevice.h

#ifndef _LINUX_ETHERDEVICE_H
#define _LINUX_ETHERDEVICE_H
#include <linux/if_ether.h>

/* Reserved Ethernet Addresses per IEEE 802.1Q */
static const u8 eth_reserved_addr_base[ETH_ALEN] __aligned(2) =
{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 };

/**
 * is_link_local_ether_addr - Determine if given Ethernet address is link-local
 * @addr: Pointer to a six-byte array containing the Ethernet address
 *
 * Return true if address is link local reserved addr (01:80:c2:00:00:0X) per
 * IEEE 802.1Q 8.6.3 Frame filtering.
 */
static inline bool is_link_local_ether_addr(const u8 *addr)
{
	__be16 *a = (__be16 *)addr;
	static const __be16 *b = (const __be16 *)eth_reserved_addr_base;
	static const __be16 m = cpu_to_be16(0xfff0);

	return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | ((a[2] ^ b[2]) & m)) == 0;
}

/**
 * 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 bool is_zero_ether_addr(const u8 *addr)
{
	return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
}

/**
 * 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.
 * By definition the broadcast address is also a multicast address.
 */
static inline bool is_multicast_ether_addr(const u8 *addr)
{
	return 0x01 & addr[0];
}

/**
 * is_local_ether_addr - Determine if the Ethernet address is locally-assigned one (IEEE 802).
 * @addr: Pointer to a six-byte array containing the Ethernet address
 *
 * Return true if the address is a local address.
 */
static inline bool is_local_ether_addr(const u8 *addr)
{
	return 0x02 & 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 bool is_broadcast_ether_addr(const u8 *addr)
{
	return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 0xff;
}

/**
 * is_unicast_ether_addr - Determine if the Ethernet address is unicast
 * @addr: Pointer to a six-byte array containing the Ethernet address
 *
 * Return true if the address is a unicast address.
 */
static inline bool is_unicast_ether_addr(const u8 *addr)
{
	return !is_multicast_ether_addr(addr);
}

/**
 * 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 bool 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);
}

/**
 * eth_random_addr - Generate software assigned random Ethernet address
 * @addr: Pointer to a six-byte array containing the Ethernet address
 *
 * Generate a random Ethernet address (MAC) that is not multicast
 * and has the local assigned bit set.
 */
static inline void eth_random_addr(u8 *addr)
{
	get_random_bytes(addr, ETH_ALEN);
	addr[0] &= 0xfe;	/* clear multicast bit */
	addr[0] |= 0x02;	/* set local assignment bit (IEEE802) */
}

#define random_ether_addr(addr) eth_random_addr(addr)

/**
 * eth_broadcast_addr - Assign broadcast address
 * @addr: Pointer to a six-byte array containing the Ethernet address
 *
 * Assign the broadcast address to the given address array.
 */
static inline void eth_broadcast_addr(u8 *addr)
{
	memset(addr, 0xff, ETH_ALEN);
}

/**
 * eth_zero_addr - Assign zero address
 * @addr: Pointer to a six-byte array containing the Ethernet address
 *
 * Assign the zero address to the given address array.
 */
static inline void eth_zero_addr(u8 *addr)
{
	memset(addr, 0x00, ETH_ALEN);
}

#if 0
/**
 * eth_hw_addr_random - Generate software assigned random Ethernet and
 * set device flag
 * @dev: pointer to net_device structure
 *
 * Generate a random Ethernet address (MAC) to be used by a net device
 * and set addr_assign_type so the state can be read by sysfs and be
 * used by userspace.
 */
static inline void eth_hw_addr_random(struct net_device *dev)
{
	dev->addr_assign_type = NET_ADDR_RANDOM;
	eth_random_addr(dev->dev_addr);
}
#endif
/**
 * 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
 *
 * Compare two Ethernet addresses, returns 0 if equal, non-zero otherwise.
 * Unlike memcmp(), it doesn't return a value suitable for sorting.
 */
static inline unsigned compare_ether_addr(const u8 *addr1, const u8 *addr2)
{
	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;
}

/**
 * ether_addr_equal - 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
 *
 * Compare two Ethernet addresses, returns true if equal
 */
static inline bool ether_addr_equal(const u8 *addr1, const u8 *addr2)
{
	return !compare_ether_addr(addr1, addr2);
}

static inline unsigned long zap_last_2bytes(unsigned long value)
{
#ifdef __BIG_ENDIAN
	return value >> 16;
#else
	return value << 16;
#endif
}

/**
 * ether_addr_equal_64bits - Compare two Ethernet addresses
 * @addr1: Pointer to an array of 8 bytes
 * @addr2: Pointer to an other array of 8 bytes
 *
 * Compare two Ethernet addresses, returns true if equal, false otherwise.
 *
 * The function doesn't need any conditional branches and possibly uses
 * word memory accesses on CPU allowing cheap unaligned memory reads.
 * arrays = { byte1, byte2, byte3, byte4, byte5, byte6, pad1, pad2 }
 *
 * Please note that alignment of addr1 & addr2 are only guaranteed to be 16 bits.
 */

static inline bool ether_addr_equal_64bits(const u8 addr1[6+2],
					   const u8 addr2[6+2])
{
#ifdef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
	unsigned long fold = ((*(unsigned long *)addr1) ^
			      (*(unsigned long *)addr2));

	if (sizeof(fold) == 8)
		return zap_last_2bytes(fold) == 0;

	fold |= zap_last_2bytes((*(unsigned long *)(addr1 + 4)) ^
				(*(unsigned long *)(addr2 + 4)));
	return fold == 0;
#else
	return ether_addr_equal(addr1, addr2);
#endif
}

#if 0
/**
 * is_etherdev_addr - Tell if given Ethernet address belongs to the device.
 * @dev: Pointer to a device structure
 * @addr: Pointer to a six-byte array containing the Ethernet address
 *
 * Compare passed address with all addresses of the device. Return true if the
 * address if one of the device addresses.
 *
 * Note that this function calls ether_addr_equal_64bits() so take care of
 * the right padding.
 */
static inline bool is_etherdev_addr(const struct net_device *dev,
				    const u8 addr[6 + 2])
{
	struct netdev_hw_addr *ha;
	bool res = false;

	rcu_read_lock();
	for_each_dev_addr(dev, ha) {
		res = ether_addr_equal_64bits(addr, ha->addr);
		if (res)
			break;
	}
	rcu_read_unlock();
	return res;
}
#endif
/**
 * compare_ether_header - Compare two Ethernet headers
 * @a: Pointer to Ethernet header
 * @b: Pointer to Ethernet header
 *
 * Compare two Ethernet headers, returns 0 if equal.
 * This assumes that the network header (i.e., IP header) is 4-byte
 * aligned OR the platform can handle unaligned access.  This is the
 * case for all packets coming into netif_receive_skb or similar
 * entry points.
 */

static inline unsigned long compare_ether_header(const void *a, const void *b)
{
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	unsigned long fold;

	/*
	 * We want to compare 14 bytes:
	 *  [a0 ... a13] ^ [b0 ... b13]
	 * Use two long XOR, ORed together, with an overlap of two bytes.
	 *  [a0  a1  a2  a3  a4  a5  a6  a7 ] ^ [b0  b1  b2  b3  b4  b5  b6  b7 ] |
	 *  [a6  a7  a8  a9  a10 a11 a12 a13] ^ [b6  b7  b8  b9  b10 b11 b12 b13]
	 * This means the [a6 a7] ^ [b6 b7] part is done two times.
	*/
	fold = *(unsigned long *)a ^ *(unsigned long *)b;
	fold |= *(unsigned long *)(a + 6) ^ *(unsigned long *)(b + 6);
	return fold;
#else
	u32 *a32 = (u32 *)((u8 *)a + 2);
	u32 *b32 = (u32 *)((u8 *)b + 2);

	return (*(u16 *)a ^ *(u16 *)b) | (a32[0] ^ b32[0]) |
	       (a32[1] ^ b32[1]) | (a32[2] ^ b32[2]);
#endif
}

/**
 * ether_addr_to_u64 - Convert an Ethernet address into a u64 value.
 * @addr: Pointer to a six-byte array containing the Ethernet address
 *
 * Return a u64 value of the address
 */
static inline u64 ether_addr_to_u64(const u8 *addr)
{
	u64 u = 0;
	int i;

	for (i = 0; i < ETH_ALEN; i++)
		u = u << 8 | addr[i];

	return u;
}

/**
 * u64_to_ether_addr - Convert a u64 to an Ethernet address.
 * @u: u64 to convert to an Ethernet MAC address
 * @addr: Pointer to a six-byte array to contain the Ethernet address
 */
static inline void u64_to_ether_addr(u64 u, u8 *addr)
{
	int i;

	for (i = ETH_ALEN - 1; i >= 0; i--) {
		addr[i] = u & 0xff;
		u = u >> 8;
	}
}

#define ether_addr_copy(d, s) memcpy(d,s,6)


#endif	/* _LINUX_ETHERDEVICE_H */