| 1 | /* linux/net/inet/arp.h */ |
| 2 | #ifndef _ARP_H |
| 3 | #define _ARP_H |
| 4 | |
| 5 | #include <linux/if_arp.h> |
| 6 | #include <linux/hash.h> |
| 7 | #include <net/neighbour.h> |
| 8 | |
| 9 | |
| 10 | extern struct neigh_table arp_tbl; |
| 11 | |
| 12 | static inline u32 arp_hashfn(const void *pkey, const struct net_device *dev, u32 *hash_rnd) |
| 13 | { |
| 14 | u32 key = *(const u32 *)pkey; |
| 15 | u32 val = key ^ hash32_ptr(dev); |
| 16 | |
| 17 | return val * hash_rnd[0]; |
| 18 | } |
| 19 | |
| 20 | static inline struct neighbour *__ipv4_neigh_lookup_noref(struct net_device *dev, u32 key) |
| 21 | { |
| 22 | return ___neigh_lookup_noref(&arp_tbl, neigh_key_eq32, arp_hashfn, &key, dev); |
| 23 | } |
| 24 | |
| 25 | static inline struct neighbour *__ipv4_neigh_lookup(struct net_device *dev, u32 key) |
| 26 | { |
| 27 | struct neighbour *n; |
| 28 | |
| 29 | rcu_read_lock_bh(); |
| 30 | n = __ipv4_neigh_lookup_noref(dev, key); |
| 31 | if (n && !atomic_inc_not_zero(&n->refcnt)) |
| 32 | n = NULL; |
| 33 | rcu_read_unlock_bh(); |
| 34 | |
| 35 | return n; |
| 36 | } |
| 37 | |
| 38 | void arp_init(void); |
| 39 | int arp_ioctl(struct net *net, unsigned int cmd, void __user *arg); |
| 40 | void arp_send(int type, int ptype, __be32 dest_ip, |
| 41 | struct net_device *dev, __be32 src_ip, |
| 42 | const unsigned char *dest_hw, |
| 43 | const unsigned char *src_hw, const unsigned char *th); |
| 44 | int arp_mc_map(__be32 addr, u8 *haddr, struct net_device *dev, int dir); |
| 45 | void arp_ifdown(struct net_device *dev); |
| 46 | |
| 47 | struct sk_buff *arp_create(int type, int ptype, __be32 dest_ip, |
| 48 | struct net_device *dev, __be32 src_ip, |
| 49 | const unsigned char *dest_hw, |
| 50 | const unsigned char *src_hw, |
| 51 | const unsigned char *target_hw); |
| 52 | void arp_xmit(struct sk_buff *skb); |
| 53 | |
| 54 | #endif /* _ARP_H */ |