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 struct nf_bridge_frag_data {
9 char mac[ETH_HLEN];
10 bool vlan_present;
11 u16 vlan_tci;
12 __be16 vlan_proto;
13 };
14
15 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
16
17 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
18
19 static inline void br_drop_fake_rtable(struct sk_buff *skb)
20 {
21 struct dst_entry *dst = skb_dst(skb);
22
23 if (dst && (dst->flags & DST_FAKE_RTABLE))
24 skb_dst_drop(skb);
25 }
26
27 static inline struct nf_bridge_info *
28 nf_bridge_info_get(const struct sk_buff *skb)
29 {
30 return skb_ext_find(skb, SKB_EXT_BRIDGE_NF);
31 }
32
33 static inline bool nf_bridge_info_exists(const struct sk_buff *skb)
34 {
35 return skb_ext_exist(skb, SKB_EXT_BRIDGE_NF);
36 }
37
38 static inline int nf_bridge_get_physinif(const struct sk_buff *skb)
39 {
40 const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
41
42 if (!nf_bridge)
43 return 0;
44
45 return nf_bridge->physinif;
46 }
47
48 static inline int nf_bridge_get_physoutif(const struct sk_buff *skb)
49 {
50 const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
51
52 if (!nf_bridge)
53 return 0;
54
55 return nf_bridge->physoutdev ? nf_bridge->physoutdev->ifindex : 0;
56 }
57
58 static inline struct net_device *
59 nf_bridge_get_physindev(const struct sk_buff *skb, struct net *net)
60 {
61 const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
62
63 return nf_bridge ? dev_get_by_index_rcu(net, nf_bridge->physinif) : NULL;
64 }
65
66 static inline struct net_device *
67 nf_bridge_get_physoutdev(const struct sk_buff *skb)
68 {
69 const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
70
71 return nf_bridge ? nf_bridge->physoutdev : NULL;
72 }
73
74 static inline bool nf_bridge_in_prerouting(const struct sk_buff *skb)
75 {
76 const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
77
78 return nf_bridge && nf_bridge->in_prerouting;
79 }
80 #else
81 #define br_drop_fake_rtable(skb) do { } while (0)
82 static inline bool nf_bridge_in_prerouting(const struct sk_buff *skb)
83 {
84 return false;
85 }
86 #endif /* CONFIG_BRIDGE_NETFILTER */
87
88 #endif
89
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