cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

arp.h (2010B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/* linux/net/inet/arp.h */
      3#ifndef _ARP_H
      4#define _ARP_H
      5
      6#include <linux/if_arp.h>
      7#include <linux/hash.h>
      8#include <net/neighbour.h>
      9
     10
     11extern struct neigh_table arp_tbl;
     12
     13static inline u32 arp_hashfn(const void *pkey, const struct net_device *dev, u32 *hash_rnd)
     14{
     15	u32 key = *(const u32 *)pkey;
     16	u32 val = key ^ hash32_ptr(dev);
     17
     18	return val * hash_rnd[0];
     19}
     20
     21#ifdef CONFIG_INET
     22static inline struct neighbour *__ipv4_neigh_lookup_noref(struct net_device *dev, u32 key)
     23{
     24	if (dev->flags & (IFF_LOOPBACK | IFF_POINTOPOINT))
     25		key = INADDR_ANY;
     26
     27	return ___neigh_lookup_noref(&arp_tbl, neigh_key_eq32, arp_hashfn, &key, dev);
     28}
     29#else
     30static inline
     31struct neighbour *__ipv4_neigh_lookup_noref(struct net_device *dev, u32 key)
     32{
     33	return NULL;
     34}
     35#endif
     36
     37static inline struct neighbour *__ipv4_neigh_lookup(struct net_device *dev, u32 key)
     38{
     39	struct neighbour *n;
     40
     41	rcu_read_lock_bh();
     42	n = __ipv4_neigh_lookup_noref(dev, key);
     43	if (n && !refcount_inc_not_zero(&n->refcnt))
     44		n = NULL;
     45	rcu_read_unlock_bh();
     46
     47	return n;
     48}
     49
     50static inline void __ipv4_confirm_neigh(struct net_device *dev, u32 key)
     51{
     52	struct neighbour *n;
     53
     54	rcu_read_lock_bh();
     55	n = __ipv4_neigh_lookup_noref(dev, key);
     56	neigh_confirm(n);
     57	rcu_read_unlock_bh();
     58}
     59
     60void arp_init(void);
     61int arp_ioctl(struct net *net, unsigned int cmd, void __user *arg);
     62void 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);
     66int arp_mc_map(__be32 addr, u8 *haddr, struct net_device *dev, int dir);
     67void arp_ifdown(struct net_device *dev);
     68int arp_invalidate(struct net_device *dev, __be32 ip, bool force);
     69
     70struct 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);
     75void arp_xmit(struct sk_buff *skb);
     76
     77#endif	/* _ARP_H */