1 /* linux/net/inet/arp.h */
5 #include <linux/if_arp.h>
6 #include <linux/hash.h>
7 #include <net/neighbour.h>
10 extern struct neigh_table arp_tbl;
12 static inline u32 arp_hashfn(const void *pkey, const struct net_device *dev, u32 *hash_rnd)
14 u32 key = *(const u32 *)pkey;
15 u32 val = key ^ hash32_ptr(dev);
17 return val * hash_rnd[0];
20 static inline struct neighbour *__ipv4_neigh_lookup_noref(struct net_device *dev, u32 key)
22 return ___neigh_lookup_noref(&arp_tbl, neigh_key_eq32, arp_hashfn, &key, dev);
25 static inline struct neighbour *__ipv4_neigh_lookup(struct net_device *dev, u32 key)
30 n = __ipv4_neigh_lookup_noref(dev, key);
31 if (n && !atomic_inc_not_zero(&n->refcnt))
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);
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);