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 nf_bridge_mtu_reduction(const struct sk_buff * skb)23static 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 br_drop_fake_rtable(struct sk_buff * skb)32static 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 nf_bridge_get_physinif(const struct sk_buff * skb)40static inline int nf_bridge_get_physinif(const struct sk_buff *skb) 41 { 42 struct nf_bridge_info *nf_bridge; 43 44 if (skb->nf_bridge == NULL) 45 return 0; 46 47 nf_bridge = skb->nf_bridge; 48 return nf_bridge->physindev ? nf_bridge->physindev->ifindex : 0; 49 } 50 nf_bridge_get_physoutif(const struct sk_buff * skb)51static inline int nf_bridge_get_physoutif(const struct sk_buff *skb) 52 { 53 struct nf_bridge_info *nf_bridge; 54 55 if (skb->nf_bridge == NULL) 56 return 0; 57 58 nf_bridge = skb->nf_bridge; 59 return nf_bridge->physoutdev ? nf_bridge->physoutdev->ifindex : 0; 60 } 61 62 static inline struct net_device * nf_bridge_get_physindev(const struct sk_buff * skb)63nf_bridge_get_physindev(const struct sk_buff *skb) 64 { 65 return skb->nf_bridge ? skb->nf_bridge->physindev : NULL; 66 } 67 68 static inline struct net_device * nf_bridge_get_physoutdev(const struct sk_buff * skb)69nf_bridge_get_physoutdev(const struct sk_buff *skb) 70 { 71 return skb->nf_bridge ? skb->nf_bridge->physoutdev : NULL; 72 } 73 #else 74 #define br_drop_fake_rtable(skb) do { } while (0) 75 #endif /* CONFIG_BRIDGE_NETFILTER */ 76 77 #endif 78