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Linux/include/linux/netfilter_bridge.h

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  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
 77 

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