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Commit | Line | Data |
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1da177e4 LT |
1 | /* linux/net/inet/arp.h */ |
2 | #ifndef _ARP_H | |
3 | #define _ARP_H | |
4 | ||
5 | #include <linux/if_arp.h> | |
6 | #include <net/neighbour.h> | |
7 | ||
1da177e4 LT |
8 | |
9 | extern struct neigh_table arp_tbl; | |
10 | ||
f610b74b DM |
11 | static inline u32 arp_hashfn(u32 key, const struct net_device *dev, u32 hash_rnd) |
12 | { | |
13 | u32 val = key ^ dev->ifindex; | |
14 | ||
15 | return val * hash_rnd; | |
16 | } | |
17 | ||
80703d26 | 18 | static inline struct neighbour *__ipv4_neigh_lookup(struct net_device *dev, u32 key) |
3769cffb DM |
19 | { |
20 | struct neigh_hash_table *nht; | |
21 | struct neighbour *n; | |
22 | u32 hash_val; | |
23 | ||
24 | rcu_read_lock_bh(); | |
80703d26 | 25 | nht = rcu_dereference_bh(arp_tbl.nht); |
2c2aba6c | 26 | hash_val = arp_hashfn(key, dev, nht->hash_rnd[0]) >> (32 - nht->hash_shift); |
3769cffb DM |
27 | for (n = rcu_dereference_bh(nht->hash_buckets[hash_val]); |
28 | n != NULL; | |
29 | n = rcu_dereference_bh(n->next)) { | |
30 | if (n->dev == dev && *(u32 *)n->primary_key == key) { | |
31 | if (!atomic_inc_not_zero(&n->refcnt)) | |
32 | n = NULL; | |
33 | break; | |
34 | } | |
35 | } | |
36 | rcu_read_unlock_bh(); | |
37 | ||
38 | return n; | |
39 | } | |
40 | ||
1da177e4 | 41 | extern void arp_init(void); |
1da177e4 | 42 | extern int arp_find(unsigned char *haddr, struct sk_buff *skb); |
32e569b7 | 43 | extern int arp_ioctl(struct net *net, unsigned int cmd, void __user *arg); |
ed9bad06 AV |
44 | extern void arp_send(int type, int ptype, __be32 dest_ip, |
45 | struct net_device *dev, __be32 src_ip, | |
abfdf1c4 JE |
46 | const unsigned char *dest_hw, |
47 | const unsigned char *src_hw, const unsigned char *th); | |
714e85be | 48 | extern int arp_mc_map(__be32 addr, u8 *haddr, struct net_device *dev, int dir); |
1da177e4 LT |
49 | extern void arp_ifdown(struct net_device *dev); |
50 | ||
ed9bad06 AV |
51 | extern struct sk_buff *arp_create(int type, int ptype, __be32 dest_ip, |
52 | struct net_device *dev, __be32 src_ip, | |
abfdf1c4 JE |
53 | const unsigned char *dest_hw, |
54 | const unsigned char *src_hw, | |
55 | const unsigned char *target_hw); | |
1da177e4 | 56 | extern void arp_xmit(struct sk_buff *skb); |
545ecdc3 | 57 | int arp_invalidate(struct net_device *dev, __be32 ip); |
1da177e4 | 58 | |
1da177e4 | 59 | #endif /* _ARP_H */ |