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Linux/include/net/netfilter/br_netfilter.h

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  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 
  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 *
 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 
 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 
 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 void br_netfilter_enable(void);
 53 
 54 #if IS_ENABLED(CONFIG_IPV6)
 55 int br_validate_ipv6(struct net *net, struct sk_buff *skb);
 56 unsigned int br_nf_pre_routing_ipv6(void *priv,
 57                                     struct sk_buff *skb,
 58                                     const struct nf_hook_state *state);
 59 #else
 60 static inline int br_validate_ipv6(struct net *net, struct sk_buff *skb)
 61 {
 62         return -1;
 63 }
 64 
 65 static inline unsigned int
 66 br_nf_pre_routing_ipv6(const struct nf_hook_ops *ops, struct sk_buff *skb,
 67                        const struct nf_hook_state *state)
 68 {
 69         return NF_ACCEPT;
 70 }
 71 #endif
 72 
 73 #endif /* _BR_NETFILTER_H_ */
 74 

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