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 #define BRNF_8021Q                      0x10
  24 #define BRNF_PPPoE                      0x20
  25
  26 static inline unsigned int nf_bridge_mtu_reduction(const struct sk_buff *skb)
  27 {
  28         if (unlikely(skb->nf_bridge->mask & BRNF_PPPoE))
  29                 return PPPOE_SES_HLEN;
  30         return 0;
  31 }
  32
  33 int br_handle_frame_finish(struct sk_buff *skb);
  34
  35 static inline void br_drop_fake_rtable(struct sk_buff *skb)
  36 {
  37         struct dst_entry *dst = skb_dst(skb);
  38
  39         if (dst && (dst->flags & DST_FAKE_RTABLE))
  40                 skb_dst_drop(skb);
  41 }
  42
  43 static inline int nf_bridge_get_physinif(const struct sk_buff *skb)
  44 {
  45         return skb->nf_bridge ? skb->nf_bridge->physindev->ifindex : 0;
  46 }
  47
  48 static inline int nf_bridge_get_physoutif(const struct sk_buff *skb)
  49 {
  50         return skb->nf_bridge ? skb->nf_bridge->physoutdev->ifindex : 0;
  51 }
  52
  53 static inline struct net_device *
  54 nf_bridge_get_physindev(const struct sk_buff *skb)
  55 {
  56         return skb->nf_bridge ? skb->nf_bridge->physindev : NULL;
  57 }
  58
  59 static inline struct net_device *
  60 nf_bridge_get_physoutdev(const struct sk_buff *skb)
  61 {
  62         return skb->nf_bridge ? skb->nf_bridge->physoutdev : NULL;
  63 }
  64 #else
  65 #define br_drop_fake_rtable(skb)                do { } while (0)
  66 #endif /* CONFIG_BRIDGE_NETFILTER */
  67
  68 #endif