include/linux/netfilter_bridge.h

   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
   7 enum 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 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
  21
  22 static 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
  30 static 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
  41 static 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
  52 static inline struct net_device *
  53 nf_bridge_get_physindev(const struct sk_buff *skb)
  54 {
  55         return skb->nf_bridge ? skb->nf_bridge->physindev : NULL;
  56 }
  57
  58 static inline struct net_device *
  59 nf_bridge_get_physoutdev(const struct sk_buff *skb)
  60 {
  61         return skb->nf_bridge ? skb->nf_bridge->physoutdev : NULL;
  62 }
  63
  64 static 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)
  70 static inline bool nf_bridge_in_prerouting(const struct sk_buff *skb)
  71 {
  72         return false;
  73 }
  74 #endif /* CONFIG_BRIDGE_NETFILTER */
  75
  76 #endif