1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BR_NETFILTER_H_
3 #define _BR_NETFILTER_H_
4
5 #include "../../../net/bridge/br_private.h"
6
nf_bridge_alloc(struct sk_buff * skb)7 static inline struct nf_bridge_info *nf_bridge_alloc(struct sk_buff *skb)
8 {
9 skb->nf_bridge = kzalloc(sizeof(struct nf_bridge_info), GFP_ATOMIC);
10
11 if (likely(skb->nf_bridge))
12 refcount_set(&(skb->nf_bridge->use), 1);
13
14 return skb->nf_bridge;
15 }
16
17 void nf_bridge_update_protocol(struct sk_buff *skb);
18
19 int br_nf_hook_thresh(unsigned int hook, struct net *net, struct sock *sk,
20 struct sk_buff *skb, struct net_device *indev,
21 struct net_device *outdev,
22 int (*okfn)(struct net *, struct sock *,
23 struct sk_buff *));
24
25 static inline struct nf_bridge_info *
nf_bridge_info_get(const struct sk_buff * skb)26 nf_bridge_info_get(const struct sk_buff *skb)
27 {
28 return skb->nf_bridge;
29 }
30
31 unsigned int nf_bridge_encap_header_len(const struct sk_buff *skb);
32
nf_bridge_push_encap_header(struct sk_buff * skb)33 static inline void nf_bridge_push_encap_header(struct sk_buff *skb)
34 {
35 unsigned int len = nf_bridge_encap_header_len(skb);
36
37 skb_push(skb, len);
38 skb->network_header -= len;
39 }
40
41 int br_nf_pre_routing_finish_bridge(struct net *net, struct sock *sk, struct sk_buff *skb);
42
bridge_parent_rtable(const struct net_device * dev)43 static inline struct rtable *bridge_parent_rtable(const struct net_device *dev)
44 {
45 struct net_bridge_port *port;
46
47 port = br_port_get_rcu(dev);
48 return port ? &port->br->fake_rtable : NULL;
49 }
50
51 struct net_device *setup_pre_routing(struct sk_buff *skb);
52
53 #if IS_ENABLED(CONFIG_IPV6)
54 int br_validate_ipv6(struct net *net, struct sk_buff *skb);
55 unsigned int br_nf_pre_routing_ipv6(void *priv,
56 struct sk_buff *skb,
57 const struct nf_hook_state *state);
58 #else
br_validate_ipv6(struct net * net,struct sk_buff * skb)59 static inline int br_validate_ipv6(struct net *net, struct sk_buff *skb)
60 {
61 return -1;
62 }
63
64 static inline unsigned int
br_nf_pre_routing_ipv6(const struct nf_hook_ops * ops,struct sk_buff * skb,const struct nf_hook_state * state)65 br_nf_pre_routing_ipv6(const struct nf_hook_ops *ops, struct sk_buff *skb,
66 const struct nf_hook_state *state)
67 {
68 return NF_ACCEPT;
69 }
70 #endif
71
72 #endif /* _BR_NETFILTER_H_ */
73