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_PKT_TYPE                   0x01
  21 #define BRNF_BRIDGED_DNAT               0x02
  22 #define BRNF_NF_BRIDGE_PREROUTING       0x08
  23
  24 static inline unsigned int nf_bridge_mtu_reduction(const struct sk_buff *skb)
  25 {
  26         if (skb->nf_bridge->orig_proto == BRNF_PROTO_PPPOE)
  27                 return PPPOE_SES_HLEN;
  28         return 0;
  29 }
  30
  31 int br_handle_frame_finish(struct sk_buff *skb);
  32
  33 static inline void br_drop_fake_rtable(struct sk_buff *skb)
  34 {
  35         struct dst_entry *dst = skb_dst(skb);
  36
  37         if (dst && (dst->flags & DST_FAKE_RTABLE))
  38                 skb_dst_drop(skb);
  39 }
  40
  41 static inline int nf_bridge_get_physinif(const struct sk_buff *skb)
  42 {
  43         return skb->nf_bridge ? skb->nf_bridge->physindev->ifindex : 0;
  44 }
  45
  46 static inline int nf_bridge_get_physoutif(const struct sk_buff *skb)
  47 {
  48         return skb->nf_bridge ? skb->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         return skb->nf_bridge ? skb->nf_bridge->physindev : NULL;
  55 }
  56
  57 static inline struct net_device *
  58 nf_bridge_get_physoutdev(const struct sk_buff *skb)
  59 {
  60         return skb->nf_bridge ? skb->nf_bridge->physoutdev : NULL;
  61 }
  62 #else
  63 #define br_drop_fake_rtable(skb)                do { } while (0)
  64 #endif /* CONFIG_BRIDGE_NETFILTER */
  65
  66 #endif