11da177e4SLinus Torvalds /* linux/net/inet/arp.h */ 21da177e4SLinus Torvalds #ifndef _ARP_H 31da177e4SLinus Torvalds #define _ARP_H 41da177e4SLinus Torvalds 51da177e4SLinus Torvalds #include <linux/if_arp.h> 6b14f243aSPavel Emelyanov #include <linux/hash.h> 71da177e4SLinus Torvalds #include <net/neighbour.h> 81da177e4SLinus Torvalds 91da177e4SLinus Torvalds 101da177e4SLinus Torvalds extern struct neigh_table arp_tbl; 111da177e4SLinus Torvalds 12*60395a20SEric W. Biederman static inline u32 arp_hashfn(const void *pkey, const struct net_device *dev, u32 *hash_rnd) 13f610b74bSDavid S. Miller { 14*60395a20SEric W. Biederman u32 key = *(const u32 *)pkey; 15b14f243aSPavel Emelyanov u32 val = key ^ hash32_ptr(dev); 16f610b74bSDavid S. Miller 17*60395a20SEric W. Biederman return val * hash_rnd[0]; 18f610b74bSDavid S. Miller } 19f610b74bSDavid S. Miller 20a263b309SDavid S. Miller static inline struct neighbour *__ipv4_neigh_lookup_noref(struct net_device *dev, u32 key) 213769cffbSDavid Miller { 22*60395a20SEric W. Biederman return ___neigh_lookup_noref(&arp_tbl, neigh_key_eq32, arp_hashfn, &key, dev); 23a263b309SDavid S. Miller } 24a263b309SDavid S. Miller 25a263b309SDavid S. Miller static inline struct neighbour *__ipv4_neigh_lookup(struct net_device *dev, u32 key) 26a263b309SDavid S. Miller { 27a263b309SDavid S. Miller struct neighbour *n; 28a263b309SDavid S. Miller 29a263b309SDavid S. Miller rcu_read_lock_bh(); 30a263b309SDavid S. Miller n = __ipv4_neigh_lookup_noref(dev, key); 31a263b309SDavid S. Miller if (n && !atomic_inc_not_zero(&n->refcnt)) 323769cffbSDavid Miller n = NULL; 333769cffbSDavid Miller rcu_read_unlock_bh(); 343769cffbSDavid Miller 353769cffbSDavid Miller return n; 363769cffbSDavid Miller } 373769cffbSDavid Miller 3890972b22SJoe Perches void arp_init(void); 3990972b22SJoe Perches int arp_ioctl(struct net *net, unsigned int cmd, void __user *arg); 4090972b22SJoe Perches void arp_send(int type, int ptype, __be32 dest_ip, 41ed9bad06SAl Viro struct net_device *dev, __be32 src_ip, 42abfdf1c4SJan Engelhardt const unsigned char *dest_hw, 43abfdf1c4SJan Engelhardt const unsigned char *src_hw, const unsigned char *th); 4490972b22SJoe Perches int arp_mc_map(__be32 addr, u8 *haddr, struct net_device *dev, int dir); 4590972b22SJoe Perches void arp_ifdown(struct net_device *dev); 461da177e4SLinus Torvalds 4790972b22SJoe Perches struct sk_buff *arp_create(int type, int ptype, __be32 dest_ip, 48ed9bad06SAl Viro struct net_device *dev, __be32 src_ip, 49abfdf1c4SJan Engelhardt const unsigned char *dest_hw, 50abfdf1c4SJan Engelhardt const unsigned char *src_hw, 51abfdf1c4SJan Engelhardt const unsigned char *target_hw); 5290972b22SJoe Perches void arp_xmit(struct sk_buff *skb); 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds #endif /* _ARP_H */ 55