projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 1da177e4 LT |
2 | /* linux/net/inet/arp.h */ |
| 3 | #ifndef _ARP_H | |
| 4 | #define _ARP_H | |
| 5 | ||
| 6 | #include <linux/if_arp.h> | |
| b14f243a | 7 | #include <linux/hash.h> |
| 1da177e4 LT |
8 | #include <net/neighbour.h> |
| 9 | ||
| 1da177e4 LT |
10 | |
| 11 | extern struct neigh_table arp_tbl; | |
| 12 | ||
| 60395a20 | 13 | static inline u32 arp_hashfn(const void *pkey, const struct net_device *dev, u32 *hash_rnd) |
| f610b74b | 14 | { |
| 60395a20 | 15 | u32 key = *(const u32 *)pkey; |
| b14f243a | 16 | u32 val = key ^ hash32_ptr(dev); |
| f610b74b | 17 | |
| 60395a20 | 18 | return val * hash_rnd[0]; |
| f610b74b DM |
19 | } |
| 20 | ||
| 9b3040a6 | 21 | #ifdef CONFIG_INET |
| a263b309 | 22 | static inline struct neighbour *__ipv4_neigh_lookup_noref(struct net_device *dev, u32 key) |
| 3769cffb | 23 | { |
| cd9ff4de JW |
24 | if (dev->flags & (IFF_LOOPBACK | IFF_POINTOPOINT)) |
| 25 | key = INADDR_ANY; | |
| 26 | ||
| 60395a20 | 27 | return ___neigh_lookup_noref(&arp_tbl, neigh_key_eq32, arp_hashfn, &key, dev); |
| a263b309 | 28 | } |
| 9b3040a6 DA |
29 | #else |
| 30 | static inline | |
| 31 | struct neighbour *__ipv4_neigh_lookup_noref(struct net_device *dev, u32 key) | |
| 32 | { | |
| 33 | return NULL; | |
| 34 | } | |
| 35 | #endif | |
| a263b309 DM |
36 | |
| 37 | static inline struct neighbour *__ipv4_neigh_lookup(struct net_device *dev, u32 key) | |
| 38 | { | |
| 39 | struct neighbour *n; | |
| 40 | ||
| 09eed119 | 41 | rcu_read_lock(); |
| a263b309 | 42 | n = __ipv4_neigh_lookup_noref(dev, key); |
| 9f237430 | 43 | if (n && !refcount_inc_not_zero(&n->refcnt)) |
| a263b309 | 44 | n = NULL; |
| 09eed119 | 45 | rcu_read_unlock(); |
| 3769cffb DM |
46 | |
| 47 | return n; | |
| 48 | } | |
| 49 | ||
| 63fca65d JA |
50 | static inline void __ipv4_confirm_neigh(struct net_device *dev, u32 key) |
| 51 | { | |
| 52 | struct neighbour *n; | |
| 53 | ||
| 09eed119 | 54 | rcu_read_lock(); |
| 63fca65d | 55 | n = __ipv4_neigh_lookup_noref(dev, key); |
| 1e84dc6b | 56 | neigh_confirm(n); |
| 09eed119 | 57 | rcu_read_unlock(); |
| 63fca65d JA |
58 | } |
| 59 | ||
| 90972b22 | 60 | void arp_init(void); |
| 90972b22 JP |
61 | int arp_ioctl(struct net *net, unsigned int cmd, void __user *arg); |
| 62 | void arp_send(int type, int ptype, __be32 dest_ip, | |
| 63 | struct net_device *dev, __be32 src_ip, | |
| 64 | const unsigned char *dest_hw, | |
| 65 | const unsigned char *src_hw, const unsigned char *th); | |
| 66 | int arp_mc_map(__be32 addr, u8 *haddr, struct net_device *dev, int dir); | |
| 67 | void arp_ifdown(struct net_device *dev); | |
| 0c51e12e | 68 | int arp_invalidate(struct net_device *dev, __be32 ip, bool force); |
| 1da177e4 | 69 | |
| 90972b22 JP |
70 | struct sk_buff *arp_create(int type, int ptype, __be32 dest_ip, |
| 71 | struct net_device *dev, __be32 src_ip, | |
| 72 | const unsigned char *dest_hw, | |
| 73 | const unsigned char *src_hw, | |
| 74 | const unsigned char *target_hw); | |
| 75 | void arp_xmit(struct sk_buff *skb); | |
| 1da177e4 | 76 | |
| 1da177e4 | 77 | #endif /* _ARP_H */ |