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 #define BRNF_BRIDGED_DNAT               0x02
  21 #define BRNF_NF_BRIDGE_PREROUTING       0x08
  22
  23 int br_handle_frame_finish(struct sock *sk, struct sk_buff *skb);
  24
  25 static 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
  33 static 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
  44 static 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
  55 static inline struct net_device *
  56 nf_bridge_get_physindev(const struct sk_buff *skb)
  57 {
  58         return skb->nf_bridge ? skb->nf_bridge->physindev : NULL;
  59 }
  60
  61 static inline struct net_device *
  62 nf_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