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
  20#define BRNF_BRIDGED_DNAT               0x02
  21#define BRNF_NF_BRIDGE_PREROUTING       0x08
  22
  23int br_handle_frame_finish(struct sock *sk, struct sk_buff *skb);
  24
  25static inline void br_drop_fake_rtable(struct sk_buff *skb)
  26{
  27        struct dst_entry *dst = skb_dst(skb);
  28
  29        if (dst && (dst->flags & DST_FAKE_RTABLE))
  30                skb_dst_drop(skb);
  31}
  32
  33static inline int nf_bridge_get_physinif(const struct sk_buff *skb)
  34{
  35        struct nf_bridge_info *nf_bridge;
  36
  37        if (skb->nf_bridge == NULL)
  38                return 0;
  39
  40        nf_bridge = skb->nf_bridge;
  41        return nf_bridge->physindev ? nf_bridge->physindev->ifindex : 0;
  42}
  43
  44static inline int nf_bridge_get_physoutif(const struct sk_buff *skb)
  45{
  46        struct nf_bridge_info *nf_bridge;
  47
  48        if (skb->nf_bridge == NULL)
  49                return 0;
  50
  51        nf_bridge = skb->nf_bridge;
  52        return nf_bridge->physoutdev ? nf_bridge->physoutdev->ifindex : 0;
  53}
  54
  55static inline struct net_device *
  56nf_bridge_get_physindev(const struct sk_buff *skb)
  57{
  58        return skb->nf_bridge ? skb->nf_bridge->physindev : NULL;
  59}
  60
  61static inline struct net_device *
  62nf_bridge_get_physoutdev(const struct sk_buff *skb)
  63{
  64        return skb->nf_bridge ? skb->nf_bridge->physoutdev : NULL;
  65}
  66#else
  67#define br_drop_fake_rtable(skb)                do { } while (0)
  68#endif /* CONFIG_BRIDGE_NETFILTER */
  69
  70#endif
  71