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 int nf_bridge_get_physinif(const struct sk_buff *skb)
  21 {
  22         struct nf_bridge_info *nf_bridge;
  23
  24         if (skb->nf_bridge == NULL)
  25                 return 0;
  26
  27         nf_bridge = skb->nf_bridge;
  28         return nf_bridge->physindev ? nf_bridge->physindev->ifindex : 0;
  29 }
  30
  31 static inline int nf_bridge_get_physoutif(const struct sk_buff *skb)
  32 {
  33         struct nf_bridge_info *nf_bridge;
  34
  35         if (skb->nf_bridge == NULL)
  36                 return 0;
  37
  38         nf_bridge = skb->nf_bridge;
  39         return nf_bridge->physoutdev ? nf_bridge->physoutdev->ifindex : 0;
  40 }
  41
  42 static inline struct net_device *
  43 nf_bridge_get_physindev(const struct sk_buff *skb)
  44 {
  45         return skb->nf_bridge ? skb->nf_bridge->physindev : NULL;
  46 }
  47
  48 static inline struct net_device *
  49 nf_bridge_get_physoutdev(const struct sk_buff *skb)
  50 {
  51         return skb->nf_bridge ? skb->nf_bridge->physoutdev : NULL;
  52 }
  53
  54 static inline bool nf_bridge_in_prerouting(const struct sk_buff *skb)
  55 {
  56         return skb->nf_bridge && skb->nf_bridge->in_prerouting;
  57 }
  58 #else
  59 #define br_drop_fake_rtable(skb)                do { } while (0)
  60 static inline bool nf_bridge_in_prerouting(const struct sk_buff *skb)
  61 {
  62         return false;
  63 }
  64 #endif /* CONFIG_BRIDGE_NETFILTER */
  65
  66 #endif