90972b2211
There are a mix of function prototypes with and without extern in the kernel sources. Standardize on not using extern for function prototypes. Function prototypes don't need to be written with extern. extern is assumed by the compiler. Its use is as unnecessary as using auto to declare automatic/local variables in a block. Reflow modified prototypes to 80 columns. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/* linux/net/inet/arp.h */
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#ifndef _ARP_H
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#define _ARP_H
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#include <linux/if_arp.h>
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#include <linux/hash.h>
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#include <net/neighbour.h>
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extern struct neigh_table arp_tbl;
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static inline u32 arp_hashfn(u32 key, const struct net_device *dev, u32 hash_rnd)
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{
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u32 val = key ^ hash32_ptr(dev);
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return val * hash_rnd;
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}
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static inline struct neighbour *__ipv4_neigh_lookup_noref(struct net_device *dev, u32 key)
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{
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struct neigh_hash_table *nht = rcu_dereference_bh(arp_tbl.nht);
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struct neighbour *n;
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u32 hash_val;
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hash_val = arp_hashfn(key, dev, nht->hash_rnd[0]) >> (32 - nht->hash_shift);
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for (n = rcu_dereference_bh(nht->hash_buckets[hash_val]);
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n != NULL;
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n = rcu_dereference_bh(n->next)) {
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if (n->dev == dev && *(u32 *)n->primary_key == key)
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return n;
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}
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return NULL;
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}
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static inline struct neighbour *__ipv4_neigh_lookup(struct net_device *dev, u32 key)
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{
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struct neighbour *n;
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rcu_read_lock_bh();
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n = __ipv4_neigh_lookup_noref(dev, key);
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if (n && !atomic_inc_not_zero(&n->refcnt))
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n = NULL;
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rcu_read_unlock_bh();
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return n;
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}
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void arp_init(void);
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int arp_find(unsigned char *haddr, struct sk_buff *skb);
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int arp_ioctl(struct net *net, unsigned int cmd, void __user *arg);
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void arp_send(int type, int ptype, __be32 dest_ip,
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struct net_device *dev, __be32 src_ip,
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const unsigned char *dest_hw,
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const unsigned char *src_hw, const unsigned char *th);
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int arp_mc_map(__be32 addr, u8 *haddr, struct net_device *dev, int dir);
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void arp_ifdown(struct net_device *dev);
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struct sk_buff *arp_create(int type, int ptype, __be32 dest_ip,
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struct net_device *dev, __be32 src_ip,
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const unsigned char *dest_hw,
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const unsigned char *src_hw,
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const unsigned char *target_hw);
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void arp_xmit(struct sk_buff *skb);
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int arp_invalidate(struct net_device *dev, __be32 ip);
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#endif /* _ARP_H */
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