1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _BR_NETFILTER_H_
3#define _BR_NETFILTER_H_
4
5#include <linux/netfilter.h>
6
7#include "../../../net/bridge/br_private.h"
8
9static inline struct nf_bridge_info *nf_bridge_alloc(struct sk_buff *skb)
10{
11#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
12 struct nf_bridge_info *b = skb_ext_add(skb, id: SKB_EXT_BRIDGE_NF);
13
14 if (b)
15 memset(b, 0, sizeof(*b));
16
17 return b;
18#else
19 return NULL;
20#endif
21}
22
23void nf_bridge_update_protocol(struct sk_buff *skb);
24
25int br_nf_hook_thresh(unsigned int hook, struct net *net, struct sock *sk,
26 struct sk_buff *skb, struct net_device *indev,
27 struct net_device *outdev,
28 int (*okfn)(struct net *, struct sock *,
29 struct sk_buff *));
30
31unsigned int nf_bridge_encap_header_len(const struct sk_buff *skb);
32
33static 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
41int br_nf_pre_routing_finish_bridge(struct net *net, struct sock *sk, struct sk_buff *skb);
42
43static inline struct rtable *bridge_parent_rtable(const struct net_device *dev)
44{
45#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
46 struct net_bridge_port *port;
47
48 port = br_port_get_rcu(dev);
49 return port ? &port->br->fake_rtable : NULL;
50#else
51 return NULL;
52#endif
53}
54
55struct net_device *setup_pre_routing(struct sk_buff *skb,
56 const struct net *net);
57
58#if IS_ENABLED(CONFIG_IPV6)
59int br_validate_ipv6(struct net *net, struct sk_buff *skb);
60unsigned int br_nf_pre_routing_ipv6(void *priv,
61 struct sk_buff *skb,
62 const struct nf_hook_state *state);
63#else
64static inline int br_validate_ipv6(struct net *net, struct sk_buff *skb)
65{
66 return -1;
67}
68
69static inline unsigned int
70br_nf_pre_routing_ipv6(void *priv, struct sk_buff *skb,
71 const struct nf_hook_state *state)
72{
73 return NF_ACCEPT;
74}
75#endif
76
77#endif /* _BR_NETFILTER_H_ */
78

source code of linux/include/net/netfilter/br_netfilter.h