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_BRIDGED_DNAT 0x02 21 #define BRNF_NF_BRIDGE_PREROUTING 0x08 22 23 static inline unsigned int nf_bridge_mtu_reduction(const struct sk_buff *skb) 24 { 25 if (skb->nf_bridge->orig_proto == BRNF_PROTO_PPPOE) 26 return PPPOE_SES_HLEN; 27 return 0; 28 } 29 30 int br_handle_frame_finish(struct sock *sk, struct sk_buff *skb); 31 32 static inline void br_drop_fake_rtable(struct sk_buff *skb) 33 { 34 struct dst_entry *dst = skb_dst(skb); 35 36 if (dst && (dst->flags & DST_FAKE_RTABLE)) 37 skb_dst_drop(skb); 38 } 39 40 static inline int nf_bridge_get_physinif(const struct sk_buff *skb) 41 { 42 return skb->nf_bridge ? skb->nf_bridge->physindev->ifindex : 0; 43 } 44 45 static inline int nf_bridge_get_physoutif(const struct sk_buff *skb) 46 { 47 return skb->nf_bridge ? skb->nf_bridge->physoutdev->ifindex : 0; 48 } 49 50 static inline struct net_device * 51 nf_bridge_get_physindev(const struct sk_buff *skb) 52 { 53 return skb->nf_bridge ? skb->nf_bridge->physindev : NULL; 54 } 55 56 static inline struct net_device * 57 nf_bridge_get_physoutdev(const struct sk_buff *skb) 58 { 59 return skb->nf_bridge ? skb->nf_bridge->physoutdev : NULL; 60 } 61 #else 62 #define br_drop_fake_rtable(skb) do { } while (0) 63 #endif /* CONFIG_BRIDGE_NETFILTER */ 64 65 #endif 66