1 #ifndef _NFNETLINK_H 2 #define _NFNETLINK_H 3 4 5 #include <linux/netlink.h> 6 #include <linux/capability.h> 7 #include <net/netlink.h> 8 #include <uapi/linux/netfilter/nfnetlink.h> 9 10 struct nfnl_callback { 11 int (*call)(struct sock *nl, struct sk_buff *skb, 12 const struct nlmsghdr *nlh, 13 const struct nlattr * const cda[]); 14 int (*call_rcu)(struct sock *nl, struct sk_buff *skb, 15 const struct nlmsghdr *nlh, 16 const struct nlattr * const cda[]); 17 const struct nla_policy *policy; /* netlink attribute policy */ 18 const u_int16_t attr_count; /* number of nlattr's */ 19 }; 20 21 struct nfnetlink_subsystem { 22 const char *name; 23 __u8 subsys_id; /* nfnetlink subsystem ID */ 24 __u8 cb_count; /* number of callbacks */ 25 const struct nfnl_callback *cb; /* callback for individual types */ 26 }; 27 28 extern int nfnetlink_subsys_register(const struct nfnetlink_subsystem *n); 29 extern int nfnetlink_subsys_unregister(const struct nfnetlink_subsystem *n); 30 31 extern int nfnetlink_has_listeners(struct net *net, unsigned int group); 32 extern int nfnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, 33 int echo, gfp_t flags); 34 extern int nfnetlink_set_err(struct net *net, u32 pid, u32 group, int error); 35 extern int nfnetlink_unicast(struct sk_buff *skb, struct net *net, u_int32_t pid, int flags); 36 37 extern void nfnl_lock(void); 38 extern void nfnl_unlock(void); 39 40 #define MODULE_ALIAS_NFNL_SUBSYS(subsys) \ 41 MODULE_ALIAS("nfnetlink-subsys-" __stringify(subsys)) 42 43 #endif /* _NFNETLINK_H */ 44