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