include/linux/netfilter_bridge.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __LINUX_BRIDGE_NETFILTER_H
   3 #define __LINUX_BRIDGE_NETFILTER_H
   4
   5 #include <uapi/linux/netfilter_bridge.h>
   6 #include <linux/skbuff.h>
   7
   8 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
   9
  10 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
  11
  12 static inline void br_drop_fake_rtable(struct sk_buff *skb)
  13 {
  14         struct dst_entry *dst = skb_dst(skb);
  15
  16         if (dst && (dst->flags & DST_FAKE_RTABLE))
  17                 skb_dst_drop(skb);
  18 }
  19
  20 static inline struct nf_bridge_info *
  21 nf_bridge_info_get(const struct sk_buff *skb)
  22 {
  23         return skb_ext_find(skb, SKB_EXT_BRIDGE_NF);
  24 }
  25
  26 static inline bool nf_bridge_info_exists(const struct sk_buff *skb)
  27 {
  28         return skb_ext_exist(skb, SKB_EXT_BRIDGE_NF);
  29 }
  30
  31 static inline int nf_bridge_get_physinif(const struct sk_buff *skb)
  32 {
  33         const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
  34
  35         if (!nf_bridge)
  36                 return 0;
  37
  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         const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
  44
  45         if (!nf_bridge)
  46                 return 0;
  47
  48         return nf_bridge->physoutdev ? nf_bridge->physoutdev->ifindex : 0;
  49 }
  50
  51 static inline struct net_device *
  52 nf_bridge_get_physindev(const struct sk_buff *skb)
  53 {
  54         const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
  55
  56         return nf_bridge ? nf_bridge->physindev : NULL;
  57 }
  58
  59 static inline struct net_device *
  60 nf_bridge_get_physoutdev(const struct sk_buff *skb)
  61 {
  62         const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
  63
  64         return nf_bridge ? nf_bridge->physoutdev : NULL;
  65 }
  66
  67 static inline bool nf_bridge_in_prerouting(const struct sk_buff *skb)
  68 {
  69         const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
  70
  71         return nf_bridge && nf_bridge->in_prerouting;
  72 }
  73 #else
  74 #define br_drop_fake_rtable(skb)                do { } while (0)
  75 static inline bool nf_bridge_in_prerouting(const struct sk_buff *skb)
  76 {
  77         return false;
  78 }
  79 #endif /* CONFIG_BRIDGE_NETFILTER */
  80
  81 #endif