linux/include/net/netfilter/nf_log.h

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

#include <linux/netfilter.h>
#include <linux/netfilter/nf_log.h>

/* Log tcp sequence, tcp options, ip options and uid owning local socket */
#define NF_LOG_DEFAULT_MASK …

/* This flag indicates that copy_len field in nf_loginfo is set */
#define NF_LOG_F_COPY_LEN …

enum nf_log_type { … };

struct nf_loginfo { … };

nf_logfn;

struct nf_logger { … };

/* sysctl_nf_log_all_netns - allow LOG target in all network namespaces */
extern int sysctl_nf_log_all_netns;

/* Function to register/unregister log function. */
int nf_log_register(u_int8_t pf, struct nf_logger *logger);
void nf_log_unregister(struct nf_logger *logger);

int nf_log_set(struct net *net, u_int8_t pf, const struct nf_logger *logger);
void nf_log_unset(struct net *net, const struct nf_logger *logger);

int nf_log_bind_pf(struct net *net, u_int8_t pf,
		   const struct nf_logger *logger);
void nf_log_unbind_pf(struct net *net, u_int8_t pf);

int nf_logger_find_get(int pf, enum nf_log_type type);
void nf_logger_put(int pf, enum nf_log_type type);

#define MODULE_ALIAS_NF_LOGGER(family, type) …

/* Calls the registered backend logging function */
__printf(8, 9)
void nf_log_packet(struct net *net,
		   u_int8_t pf,
		   unsigned int hooknum,
		   const struct sk_buff *skb,
		   const struct net_device *in,
		   const struct net_device *out,
		   const struct nf_loginfo *li,
		   const char *fmt, ...);

__printf(8, 9)
void nf_log_trace(struct net *net,
		  u_int8_t pf,
		  unsigned int hooknum,
		  const struct sk_buff *skb,
		  const struct net_device *in,
		  const struct net_device *out,
		  const struct nf_loginfo *li,
		  const char *fmt, ...);

struct nf_log_buf;

struct nf_log_buf *nf_log_buf_open(void);
__printf(2, 3) int nf_log_buf_add(struct nf_log_buf *m, const char *f, ...);
void nf_log_buf_close(struct nf_log_buf *m);
#endif /* _NF_LOG_H */