The C and C++ Include Header Files

/usr/include/linux/netfilter/nfnetlink.h


$ cat -n /usr/include/linux/netfilter/nfnetlink.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef _NFNETLINK_H
     3	#define _NFNETLINK_H
     4	#include <linux/types.h>
     5	#include <linux/netfilter/nfnetlink_compat.h>
     6	
     7	enum nfnetlink_groups {
     8		NFNLGRP_NONE,
     9	#define NFNLGRP_NONE			NFNLGRP_NONE
    10		NFNLGRP_CONNTRACK_NEW,
    11	#define NFNLGRP_CONNTRACK_NEW		NFNLGRP_CONNTRACK_NEW
    12		NFNLGRP_CONNTRACK_UPDATE,
    13	#define NFNLGRP_CONNTRACK_UPDATE	NFNLGRP_CONNTRACK_UPDATE
    14		NFNLGRP_CONNTRACK_DESTROY,
    15	#define NFNLGRP_CONNTRACK_DESTROY	NFNLGRP_CONNTRACK_DESTROY
    16		NFNLGRP_CONNTRACK_EXP_NEW,
    17	#define	NFNLGRP_CONNTRACK_EXP_NEW	NFNLGRP_CONNTRACK_EXP_NEW
    18		NFNLGRP_CONNTRACK_EXP_UPDATE,
    19	#define NFNLGRP_CONNTRACK_EXP_UPDATE	NFNLGRP_CONNTRACK_EXP_UPDATE
    20		NFNLGRP_CONNTRACK_EXP_DESTROY,
    21	#define NFNLGRP_CONNTRACK_EXP_DESTROY	NFNLGRP_CONNTRACK_EXP_DESTROY
    22		NFNLGRP_NFTABLES,
    23	#define NFNLGRP_NFTABLES                NFNLGRP_NFTABLES
    24		NFNLGRP_ACCT_QUOTA,
    25	#define NFNLGRP_ACCT_QUOTA		NFNLGRP_ACCT_QUOTA
    26		NFNLGRP_NFTRACE,
    27	#define NFNLGRP_NFTRACE			NFNLGRP_NFTRACE
    28		__NFNLGRP_MAX,
    29	};
    30	#define NFNLGRP_MAX	(__NFNLGRP_MAX - 1)
    31	
    32	/* General form of address family dependent message.
    33	 */
    34	struct nfgenmsg {
    35		__u8  nfgen_family;		/* AF_xxx */
    36		__u8  version;		/* nfnetlink version */
    37		__be16    res_id;		/* resource id */
    38	};
    39	
    40	#define NFNETLINK_V0	0
    41	
    42	/* netfilter netlink message types are split in two pieces:
    43	 * 8 bit subsystem, 8bit operation.
    44	 */
    45	
    46	#define NFNL_SUBSYS_ID(x)	((x & 0xff00) >> 8)
    47	#define NFNL_MSG_TYPE(x)	(x & 0x00ff)
    48	
    49	/* No enum here, otherwise __stringify() trick of MODULE_ALIAS_NFNL_SUBSYS()
    50	 * won't work anymore */
    51	#define NFNL_SUBSYS_NONE 		0
    52	#define NFNL_SUBSYS_CTNETLINK		1
    53	#define NFNL_SUBSYS_CTNETLINK_EXP	2
    54	#define NFNL_SUBSYS_QUEUE		3
    55	#define NFNL_SUBSYS_ULOG		4
    56	#define NFNL_SUBSYS_OSF			5
    57	#define NFNL_SUBSYS_IPSET		6
    58	#define NFNL_SUBSYS_ACCT		7
    59	#define NFNL_SUBSYS_CTNETLINK_TIMEOUT	8
    60	#define NFNL_SUBSYS_CTHELPER		9
    61	#define NFNL_SUBSYS_NFTABLES		10
    62	#define NFNL_SUBSYS_NFT_COMPAT		11
    63	#define NFNL_SUBSYS_HOOK		12
    64	#define NFNL_SUBSYS_COUNT		13
    65	
    66	/* Reserved control nfnetlink messages */
    67	#define NFNL_MSG_BATCH_BEGIN		NLMSG_MIN_TYPE
    68	#define NFNL_MSG_BATCH_END		NLMSG_MIN_TYPE+1
    69	
    70	/**
    71	 * enum nfnl_batch_attributes - nfnetlink batch netlink attributes
    72	 *
    73	 * @NFNL_BATCH_GENID: generation ID for this changeset (NLA_U32)
    74	 */
    75	enum nfnl_batch_attributes {
    76	        NFNL_BATCH_UNSPEC,
    77	        NFNL_BATCH_GENID,
    78	        __NFNL_BATCH_MAX
    79	};
    80	#define NFNL_BATCH_MAX			(__NFNL_BATCH_MAX - 1)
    81	
    82	#endif /* _NFNETLINK_H */