Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* linux/net/inet/arp.h */ |
2 | #ifndef _ARP_H | |
3 | #define _ARP_H | |
4 | ||
5 | #include <linux/if_arp.h> | |
b14f243a | 6 | #include <linux/hash.h> |
1da177e4 LT |
7 | #include <net/neighbour.h> |
8 | ||
1da177e4 LT |
9 | |
10 | extern struct neigh_table arp_tbl; | |
11 | ||
60395a20 | 12 | static inline u32 arp_hashfn(const void *pkey, const struct net_device *dev, u32 *hash_rnd) |
f610b74b | 13 | { |
60395a20 | 14 | u32 key = *(const u32 *)pkey; |
b14f243a | 15 | u32 val = key ^ hash32_ptr(dev); |
f610b74b | 16 | |
60395a20 | 17 | return val * hash_rnd[0]; |
f610b74b DM |
18 | } |
19 | ||
a263b309 | 20 | static inline struct neighbour *__ipv4_neigh_lookup_noref(struct net_device *dev, u32 key) |
3769cffb | 21 | { |
60395a20 | 22 | return ___neigh_lookup_noref(&arp_tbl, neigh_key_eq32, arp_hashfn, &key, dev); |
a263b309 DM |
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; | |
3769cffb DM |
33 | rcu_read_unlock_bh(); |
34 | ||
35 | return n; | |
36 | } | |
37 | ||
90972b22 | 38 | void arp_init(void); |
90972b22 JP |
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); | |
1da177e4 | 46 | |
90972b22 JP |
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); | |
1da177e4 | 53 | |
1da177e4 | 54 | #endif /* _ARP_H */ |