d3aaeb38c4
In the future dst entries will be neigh-less. In that environment we need to have an easy transition point for current users of dst->neighbour outside of the packet output fast path. Signed-off-by: David S. Miller <davem@davemloft.net>
60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
/* linux/net/inet/arp.h */
|
|
#ifndef _ARP_H
|
|
#define _ARP_H
|
|
|
|
#include <linux/if_arp.h>
|
|
#include <net/neighbour.h>
|
|
|
|
|
|
extern struct neigh_table arp_tbl;
|
|
|
|
static inline u32 arp_hashfn(u32 key, const struct net_device *dev, u32 hash_rnd)
|
|
{
|
|
u32 val = key ^ dev->ifindex;
|
|
|
|
return val * hash_rnd;
|
|
}
|
|
|
|
static inline struct neighbour *__ipv4_neigh_lookup(struct neigh_table *tbl, struct net_device *dev, u32 key)
|
|
{
|
|
struct neigh_hash_table *nht;
|
|
struct neighbour *n;
|
|
u32 hash_val;
|
|
|
|
rcu_read_lock_bh();
|
|
nht = rcu_dereference_bh(tbl->nht);
|
|
hash_val = arp_hashfn(key, dev, nht->hash_rnd) >> (32 - nht->hash_shift);
|
|
for (n = rcu_dereference_bh(nht->hash_buckets[hash_val]);
|
|
n != NULL;
|
|
n = rcu_dereference_bh(n->next)) {
|
|
if (n->dev == dev && *(u32 *)n->primary_key == key) {
|
|
if (!atomic_inc_not_zero(&n->refcnt))
|
|
n = NULL;
|
|
break;
|
|
}
|
|
}
|
|
rcu_read_unlock_bh();
|
|
|
|
return n;
|
|
}
|
|
|
|
extern void arp_init(void);
|
|
extern int arp_find(unsigned char *haddr, struct sk_buff *skb);
|
|
extern int arp_ioctl(struct net *net, unsigned int cmd, void __user *arg);
|
|
extern void arp_send(int type, int ptype, __be32 dest_ip,
|
|
struct net_device *dev, __be32 src_ip,
|
|
const unsigned char *dest_hw,
|
|
const unsigned char *src_hw, const unsigned char *th);
|
|
extern int arp_mc_map(__be32 addr, u8 *haddr, struct net_device *dev, int dir);
|
|
extern void arp_ifdown(struct net_device *dev);
|
|
|
|
extern struct sk_buff *arp_create(int type, int ptype, __be32 dest_ip,
|
|
struct net_device *dev, __be32 src_ip,
|
|
const unsigned char *dest_hw,
|
|
const unsigned char *src_hw,
|
|
const unsigned char *target_hw);
|
|
extern void arp_xmit(struct sk_buff *skb);
|
|
int arp_invalidate(struct net_device *dev, __be32 ip);
|
|
|
|
#endif /* _ARP_H */
|