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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - include/net/arp.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* linux/net/inet/arp.h */
6 #include <linux/if_arp.h>
7 #include <linux/hash.h>
8 #include <net/neighbour.h>
11 extern struct neigh_table arp_tbl
;
13 static inline u32
arp_hashfn(const void *pkey
, const struct net_device
*dev
, u32
*hash_rnd
)
15 u32 key
= *(const u32
*)pkey
;
16 u32 val
= key
^ hash32_ptr(dev
);
18 return val
* hash_rnd
[0];
21 static inline struct neighbour
*__ipv4_neigh_lookup_noref(struct net_device
*dev
, u32 key
)
23 return ___neigh_lookup_noref(&arp_tbl
, neigh_key_eq32
, arp_hashfn
, &key
, dev
);
26 static inline struct neighbour
*__ipv4_neigh_lookup(struct net_device
*dev
, u32 key
)
31 n
= __ipv4_neigh_lookup_noref(dev
, key
);
32 if (n
&& !refcount_inc_not_zero(&n
->refcnt
))
39 static inline void __ipv4_confirm_neigh(struct net_device
*dev
, u32 key
)
44 n
= __ipv4_neigh_lookup_noref(dev
, key
);
46 unsigned long now
= jiffies
;
48 /* avoid dirtying neighbour */
49 if (n
->confirmed
!= now
)
56 int arp_ioctl(struct net
*net
, unsigned int cmd
, void __user
*arg
);
57 void arp_send(int type
, int ptype
, __be32 dest_ip
,
58 struct net_device
*dev
, __be32 src_ip
,
59 const unsigned char *dest_hw
,
60 const unsigned char *src_hw
, const unsigned char *th
);
61 int arp_mc_map(__be32 addr
, u8
*haddr
, struct net_device
*dev
, int dir
);
62 void arp_ifdown(struct net_device
*dev
);
64 struct sk_buff
*arp_create(int type
, int ptype
, __be32 dest_ip
,
65 struct net_device
*dev
, __be32 src_ip
,
66 const unsigned char *dest_hw
,
67 const unsigned char *src_hw
,
68 const unsigned char *target_hw
);
69 void arp_xmit(struct sk_buff
*skb
);