include/uapi/linux/netfilter/nfnetlink.h

Source file repositories/reference/linux-study-clean/include/uapi/linux/netfilter/nfnetlink.h

File Facts

System
Linux kernel
Corpus path
include/uapi/linux/netfilter/nfnetlink.h
Extension
.h
Size
2472 bytes
Lines
83
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct nfgenmsg {
	__u8  nfgen_family;		/* AF_xxx */
	__u8  version;		/* nfnetlink version */
	__be16    res_id;		/* resource id */
};

#define NFNETLINK_V0	0

/* netfilter netlink message types are split in two pieces:
 * 8 bit subsystem, 8bit operation.
 */

#define NFNL_SUBSYS_ID(x)	((x & 0xff00) >> 8)
#define NFNL_MSG_TYPE(x)	(x & 0x00ff)

/* No enum here, otherwise __stringify() trick of MODULE_ALIAS_NFNL_SUBSYS()
 * won't work anymore */
#define NFNL_SUBSYS_NONE 		0
#define NFNL_SUBSYS_CTNETLINK		1
#define NFNL_SUBSYS_CTNETLINK_EXP	2
#define NFNL_SUBSYS_QUEUE		3
#define NFNL_SUBSYS_ULOG		4
#define NFNL_SUBSYS_OSF			5
#define NFNL_SUBSYS_IPSET		6
#define NFNL_SUBSYS_ACCT		7
#define NFNL_SUBSYS_CTNETLINK_TIMEOUT	8
#define NFNL_SUBSYS_CTHELPER		9
#define NFNL_SUBSYS_NFTABLES		10
#define NFNL_SUBSYS_NFT_COMPAT		11
#define NFNL_SUBSYS_HOOK		12
#define NFNL_SUBSYS_COUNT		13

/* Reserved control nfnetlink messages */
#define NFNL_MSG_BATCH_BEGIN		NLMSG_MIN_TYPE
#define NFNL_MSG_BATCH_END		NLMSG_MIN_TYPE+1

/**
 * enum nfnl_batch_attributes - nfnetlink batch netlink attributes
 *
 * @NFNL_BATCH_GENID: generation ID for this changeset (NLA_U32)
 */
enum nfnl_batch_attributes {
        NFNL_BATCH_UNSPEC,
        NFNL_BATCH_GENID,
        __NFNL_BATCH_MAX
};
#define NFNL_BATCH_MAX			(__NFNL_BATCH_MAX - 1)

#endif /* _UAPI_NFNETLINK_H */

Annotation

Implementation Notes