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 int (*call_batch)(struct sock *nl, struct sk_buff *skb, 18 const struct nlmsghdr *nlh, 19 const struct nlattr * const cda[]); 20 const struct nla_policy *policy; /* netlink attribute policy */ 21 const u_int16_t attr_count; /* number of nlattr's */ 22 }; 23 24 struct nfnetlink_subsystem { 25 const char *name; 26 __u8 subsys_id; /* nfnetlink subsystem ID */ 27 __u8 cb_count; /* number of callbacks */ 28 const struct nfnl_callback *cb; /* callback for individual types */ 29 int (*commit)(struct sk_buff *skb); 30 int (*abort)(struct sk_buff *skb); 31 }; 32 33 int nfnetlink_subsys_register(const struct nfnetlink_subsystem *n); 34 int nfnetlink_subsys_unregister(const struct nfnetlink_subsystem *n); 35 36 int nfnetlink_has_listeners(struct net *net, unsigned int group); 37 struct sk_buff *nfnetlink_alloc_skb(struct net *net, unsigned int size, 38 u32 dst_portid, gfp_t gfp_mask); 39 int nfnetlink_send(struct sk_buff *skb, struct net *net, u32 portid, 40 unsigned int group, int echo, gfp_t flags); 41 int nfnetlink_set_err(struct net *net, u32 portid, u32 group, int error); 42 int nfnetlink_unicast(struct sk_buff *skb, struct net *net, u32 portid, 43 int flags); 44 45 void nfnl_lock(__u8 subsys_id); 46 void nfnl_unlock(__u8 subsys_id); 47 48 #define MODULE_ALIAS_NFNL_SUBSYS(subsys) \ 49 MODULE_ALIAS("nfnetlink-subsys-" __stringify(subsys)) 50 51 #endif /* _NFNETLINK_H */ 52