X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=include%2Flinux%2Fetherdevice.h;h=3d7a6687d247c32577cf6bad2f7cb483fd434c51;hb=9a1607071c293e48b08bd703733480b1d55c7b93;hp=ce8518e658b6a0c2219071ed0fbfb0e462fb9115;hpb=ab611487d8ada506e511d2b8f22fb8e7be9939b9;p=safe%2Fjmp%2Flinux-2.6 diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h index ce8518e..3d7a668 100644 --- a/include/linux/etherdevice.h +++ b/include/linux/etherdevice.h @@ -27,29 +27,35 @@ #include #include #include +#include #ifdef __KERNEL__ -extern int eth_header(struct sk_buff *skb, struct net_device *dev, - unsigned short type, void *daddr, - void *saddr, unsigned len); -extern int eth_rebuild_header(struct sk_buff *skb); extern __be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev); -extern void eth_header_cache_update(struct hh_cache *hh, struct net_device *dev, - unsigned char * haddr); -extern int eth_header_cache(struct neighbour *neigh, - struct hh_cache *hh); - -extern struct net_device *alloc_etherdev(int sizeof_priv); -static inline void eth_copy_and_sum (struct sk_buff *dest, - const unsigned char *src, - int len, int base) -{ - memcpy (dest->data, src, len); -} +extern const struct header_ops eth_header_ops; + +extern int eth_header(struct sk_buff *skb, struct net_device *dev, + unsigned short type, + const void *daddr, const void *saddr, unsigned len); +extern int eth_rebuild_header(struct sk_buff *skb); +extern int eth_header_parse(const struct sk_buff *skb, unsigned char *haddr); +extern int eth_header_cache(const struct neighbour *neigh, struct hh_cache *hh); +extern void eth_header_cache_update(struct hh_cache *hh, + const struct net_device *dev, + const unsigned char *haddr); +extern int eth_mac_addr(struct net_device *dev, void *p); +extern int eth_change_mtu(struct net_device *dev, int new_mtu); +extern int eth_validate_addr(struct net_device *dev); + + + +extern struct net_device *alloc_etherdev_mq(int sizeof_priv, unsigned int queue_count); +#define alloc_etherdev(sizeof_priv) alloc_etherdev_mq(sizeof_priv, 1) /** - * 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) { @@ -57,16 +63,37 @@ 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. + * By definition the broadcast address is also a multicast address. */ static inline int is_multicast_ether_addr(const u8 *addr) { - return ((addr[0] != 0xff) && (0x01 & addr[0])); + 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 int 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 int is_broadcast_ether_addr(const u8 *addr) +{ + return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 0xff; } /** @@ -98,6 +125,111 @@ static inline void random_ether_addr(u8 *addr) addr [0] &= 0xfe; /* clear multicast bit */ addr [0] |= 0x02; /* set local assignment bit (IEEE802) */ } + +/** + * 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 + */ +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; +} + +static inline unsigned long zap_last_2bytes(unsigned long value) +{ +#ifdef __BIG_ENDIAN + return value >> 16; +#else + return value << 16; +#endif +} + +/** + * compare_ether_addr_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 0 if equal. + * Same result than "memcmp(addr1, addr2, ETH_ALEN)" but without conditional + * branches, and possibly long word memory accesses on CPU allowing cheap + * unaligned memory reads. + * arrays = { byte1, byte2, byte3, byte4, byte6, byte7, pad1, pad2} + * + * Please note that alignment of addr1 & addr2 is only guaranted to be 16 bits. + */ + +static inline unsigned compare_ether_addr_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 compare_ether_addr(addr1, addr2); +#endif +} + +/** + * 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 compare_ether_addr_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; + int res = 1; + + rcu_read_lock(); + for_each_dev_addr(dev, ha) { + res = compare_ether_addr_64bits(addr, ha->addr); + if (!res) + break; + } + rcu_read_unlock(); + return !res; +} #endif /* __KERNEL__ */ +/** + * 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 int compare_ether_header(const void *a, const void *b) +{ + 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 /* _LINUX_ETHERDEVICE_H */