linux/include/linux/netfilter/nfnetlink.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _NFNETLINK_H
#define _NFNETLINK_H

#include <linux/netlink.h>
#include <linux/capability.h>
#include <net/netlink.h>
#include <uapi/linux/netfilter/nfnetlink.h>

struct nfnl_info { … };

enum nfnl_callback_type { … };

struct nfnl_callback { … };

enum nfnl_abort_action { … };

struct nfnetlink_subsystem { … };

int nfnetlink_subsys_register(const struct nfnetlink_subsystem *n);
int nfnetlink_subsys_unregister(const struct nfnetlink_subsystem *n);

int nfnetlink_has_listeners(struct net *net, unsigned int group);
int nfnetlink_send(struct sk_buff *skb, struct net *net, u32 portid,
		   unsigned int group, int echo, gfp_t flags);
int nfnetlink_set_err(struct net *net, u32 portid, u32 group, int error);
int nfnetlink_unicast(struct sk_buff *skb, struct net *net, u32 portid);
void nfnetlink_broadcast(struct net *net, struct sk_buff *skb, __u32 portid,
			 __u32 group, gfp_t allocation);

static inline u16 nfnl_msg_type(u8 subsys, u8 msg_type)
{ … }

static inline void nfnl_fill_hdr(struct nlmsghdr *nlh, u8 family, u8 version,
				 __be16 res_id)
{ … }

static inline struct nlmsghdr *nfnl_msg_put(struct sk_buff *skb, u32 portid,
					    u32 seq, int type, int flags,
					    u8 family, u8 version,
					    __be16 res_id)
{ … }

void nfnl_lock(__u8 subsys_id);
void nfnl_unlock(__u8 subsys_id);
#ifdef CONFIG_PROVE_LOCKING
bool lockdep_nfnl_is_held(__u8 subsys_id);
#else
static inline bool lockdep_nfnl_is_held(__u8 subsys_id)
{
	return true;
}
#endif /* CONFIG_PROVE_LOCKING */

#define MODULE_ALIAS_NFNL_SUBSYS(subsys) …

#endif	/* _NFNETLINK_H */