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 nf_bridge_alloc(struct sk_buff * skb)9 static 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, 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 23 void nf_bridge_update_protocol(struct sk_buff *skb); 24 25 int 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 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 #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 55 struct net_device *setup_pre_routing(struct sk_buff *skb, 56 const struct net *net); 57 58 #if IS_ENABLED(CONFIG_IPV6) 59 int br_validate_ipv6(struct net *net, struct sk_buff *skb); 60 unsigned int br_nf_pre_routing_ipv6(void *priv, 61 struct sk_buff *skb, 62 const struct nf_hook_state *state); 63 #else br_validate_ipv6(struct net * net,struct sk_buff * skb)64 static inline int br_validate_ipv6(struct net *net, struct sk_buff *skb) 65 { 66 return -1; 67 } 68 69 static inline unsigned int br_nf_pre_routing_ipv6(void * priv,struct sk_buff * skb,const struct nf_hook_state * state)70 br_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