LXR linux/include/linux/netfilter

   1#ifndef _NETFILTER_INGRESS_H_
   2#define _NETFILTER_INGRESS_H_
   3
   4#include <linux/netfilter.h>
   5#include <linux/netdevice.h>
   6
   7#ifdef CONFIG_NETFILTER_INGRESS
   8static inline bool nf_hook_ingress_active(const struct sk_buff *skb)
   9{
  10#ifdef HAVE_JUMP_LABEL
  11        if (!static_key_false(&nf_hooks_needed[NFPROTO_NETDEV][NF_NETDEV_INGRESS]))
  12                return false;
  13#endif
  14        return !list_empty(&skb->dev->nf_hooks_ingress);
  15}
  16
  17static inline int nf_hook_ingress(struct sk_buff *skb)
  18{
  19        struct nf_hook_state state;
  20
  21        nf_hook_state_init(&state, &skb->dev->nf_hooks_ingress,
  22                           NF_NETDEV_INGRESS, INT_MIN, NFPROTO_NETDEV,
  23                           skb->dev, NULL, NULL, dev_net(skb->dev), NULL);
  24        return nf_hook_slow(skb, &state);
  25}
  26
  27static inline void nf_hook_ingress_init(struct net_device *dev)
  28{
  29        INIT_LIST_HEAD(&dev->nf_hooks_ingress);
  30}
  31#else /* CONFIG_NETFILTER_INGRESS */
  32static inline int nf_hook_ingress_active(struct sk_buff *skb)
  33{
  34        return 0;
  35}
  36
  37static inline int nf_hook_ingress(struct sk_buff *skb)
  38{
  39        return 0;
  40}
  41
  42static inline void nf_hook_ingress_init(struct net_device *dev) {}
  43#endif /* CONFIG_NETFILTER_INGRESS */
  44#endif /* _NETFILTER_INGRESS_H_ */
  45