1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __LINUX_BRIDGE_NETFILTER_H
3 #define __LINUX_BRIDGE_NETFILTER_H
4 
5 #include <uapi/linux/netfilter_bridge.h>
6 #include <linux/skbuff.h>
7 
8 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
9 
10 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
11 
br_drop_fake_rtable(struct sk_buff * skb)12 static inline void br_drop_fake_rtable(struct sk_buff *skb)
13 {
14 	struct dst_entry *dst = skb_dst(skb);
15 
16 	if (dst && (dst->flags & DST_FAKE_RTABLE))
17 		skb_dst_drop(skb);
18 }
19 
nf_bridge_get_physinif(const struct sk_buff * skb)20 static inline int nf_bridge_get_physinif(const struct sk_buff *skb)
21 {
22 	struct nf_bridge_info *nf_bridge;
23 
24 	if (skb->nf_bridge == NULL)
25 		return 0;
26 
27 	nf_bridge = skb->nf_bridge;
28 	return nf_bridge->physindev ? nf_bridge->physindev->ifindex : 0;
29 }
30 
nf_bridge_get_physoutif(const struct sk_buff * skb)31 static inline int nf_bridge_get_physoutif(const struct sk_buff *skb)
32 {
33 	struct nf_bridge_info *nf_bridge;
34 
35 	if (skb->nf_bridge == NULL)
36 		return 0;
37 
38 	nf_bridge = skb->nf_bridge;
39 	return nf_bridge->physoutdev ? nf_bridge->physoutdev->ifindex : 0;
40 }
41 
42 static inline struct net_device *
nf_bridge_get_physindev(const struct sk_buff * skb)43 nf_bridge_get_physindev(const struct sk_buff *skb)
44 {
45 	return skb->nf_bridge ? skb->nf_bridge->physindev : NULL;
46 }
47 
48 static inline struct net_device *
nf_bridge_get_physoutdev(const struct sk_buff * skb)49 nf_bridge_get_physoutdev(const struct sk_buff *skb)
50 {
51 	return skb->nf_bridge ? skb->nf_bridge->physoutdev : NULL;
52 }
53 
nf_bridge_in_prerouting(const struct sk_buff * skb)54 static inline bool nf_bridge_in_prerouting(const struct sk_buff *skb)
55 {
56 	return skb->nf_bridge && skb->nf_bridge->in_prerouting;
57 }
58 #else
59 #define br_drop_fake_rtable(skb)	        do { } while (0)
nf_bridge_in_prerouting(const struct sk_buff * skb)60 static inline bool nf_bridge_in_prerouting(const struct sk_buff *skb)
61 {
62 	return false;
63 }
64 #endif /* CONFIG_BRIDGE_NETFILTER */
65 
66 #endif
67