LXR linux/include/linux/netfilter

   1#ifndef __LINUX_BRIDGE_NETFILTER_H
   2#define __LINUX_BRIDGE_NETFILTER_H
   3
   4#include <uapi/linux/netfilter_bridge.h>
   5#include <linux/skbuff.h>
   6
   7enum nf_br_hook_priorities {
   8        NF_BR_PRI_FIRST = INT_MIN,
   9        NF_BR_PRI_NAT_DST_BRIDGED = -300,
  10        NF_BR_PRI_FILTER_BRIDGED = -200,
  11        NF_BR_PRI_BRNF = 0,
  12        NF_BR_PRI_NAT_DST_OTHER = 100,
  13        NF_BR_PRI_FILTER_OTHER = 200,
  14        NF_BR_PRI_NAT_SRC = 300,
  15        NF_BR_PRI_LAST = INT_MAX,
  16};
  17
  18#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
  19
  20int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
  21
  22static inline void br_drop_fake_rtable(struct sk_buff *skb)
  23{
  24        struct dst_entry *dst = skb_dst(skb);
  25
  26        if (dst && (dst->flags & DST_FAKE_RTABLE))
  27                skb_dst_drop(skb);
  28}
  29
  30static inline int nf_bridge_get_physinif(const struct sk_buff *skb)
  31{
  32        struct nf_bridge_info *nf_bridge;
  33
  34        if (skb->nf_bridge == NULL)
  35                return 0;
  36
  37        nf_bridge = skb->nf_bridge;
  38        return nf_bridge->physindev ? nf_bridge->physindev->ifindex : 0;
  39}
  40
  41static inline int nf_bridge_get_physoutif(const struct sk_buff *skb)
  42{
  43        struct nf_bridge_info *nf_bridge;
  44
  45        if (skb->nf_bridge == NULL)
  46                return 0;
  47
  48        nf_bridge = skb->nf_bridge;
  49        return nf_bridge->physoutdev ? nf_bridge->physoutdev->ifindex : 0;
  50}
  51
  52static inline struct net_device *
  53nf_bridge_get_physindev(const struct sk_buff *skb)
  54{
  55        return skb->nf_bridge ? skb->nf_bridge->physindev : NULL;
  56}
  57
  58static inline struct net_device *
  59nf_bridge_get_physoutdev(const struct sk_buff *skb)
  60{
  61        return skb->nf_bridge ? skb->nf_bridge->physoutdev : NULL;
  62}
  63
  64static inline bool nf_bridge_in_prerouting(const struct sk_buff *skb)
  65{
  66        return skb->nf_bridge && skb->nf_bridge->in_prerouting;
  67}
  68#else
  69#define br_drop_fake_rtable(skb)                do { } while (0)
  70static inline bool nf_bridge_in_prerouting(const struct sk_buff *skb)
  71{
  72        return false;
  73}
  74#endif /* CONFIG_BRIDGE_NETFILTER */
  75
  76#endif
  77