[linux.git] / include / uapi / linux / netlink.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI__LINUX_NETLINK_H
#define _UAPI__LINUX_NETLINK_H

#include <linux/const.h>
#include <linux/socket.h> /* for __kernel_sa_family_t */
#include <linux/types.h>

#define NETLINK_ROUTE		0	/* Routing/device hook				*/
#define NETLINK_UNUSED		1	/* Unused number				*/
#define NETLINK_USERSOCK	2	/* Reserved for user mode socket protocols 	*/
#define NETLINK_FIREWALL	3	/* Unused number, formerly ip_queue		*/
#define NETLINK_SOCK_DIAG	4	/* socket monitoring				*/
#define NETLINK_NFLOG		5	/* netfilter/iptables ULOG */
#define NETLINK_XFRM		6	/* ipsec */
#define NETLINK_SELINUX		7	/* SELinux event notifications */
#define NETLINK_ISCSI		8	/* Open-iSCSI */
#define NETLINK_AUDIT		9	/* auditing */
#define NETLINK_FIB_LOOKUP	10	
#define NETLINK_CONNECTOR	11
#define NETLINK_NETFILTER	12	/* netfilter subsystem */
#define NETLINK_IP6_FW		13
#define NETLINK_DNRTMSG		14	/* DECnet routing messages (obsolete) */
#define NETLINK_KOBJECT_UEVENT	15	/* Kernel messages to userspace */
#define NETLINK_GENERIC		16
/* leave room for NETLINK_DM (DM Events) */
#define NETLINK_SCSITRANSPORT	18	/* SCSI Transports */
#define NETLINK_ECRYPTFS	19
#define NETLINK_RDMA		20
#define NETLINK_CRYPTO		21	/* Crypto layer */
#define NETLINK_SMC		22	/* SMC monitoring */

#define NETLINK_INET_DIAG	NETLINK_SOCK_DIAG

#define MAX_LINKS 32		

struct sockaddr_nl {
	__kernel_sa_family_t	nl_family;	/* AF_NETLINK	*/
	unsigned short	nl_pad;		/* zero		*/
	__u32		nl_pid;		/* port ID	*/
       	__u32		nl_groups;	/* multicast groups mask */
};

/**
 * struct nlmsghdr - fixed format metadata header of Netlink messages
 * @nlmsg_len:   Length of message including header
 * @nlmsg_type:  Message content type
 * @nlmsg_flags: Additional flags
 * @nlmsg_seq:   Sequence number
 * @nlmsg_pid:   Sending process port ID
 */
struct nlmsghdr {
	__u32		nlmsg_len;
	__u16		nlmsg_type;
	__u16		nlmsg_flags;
	__u32		nlmsg_seq;
	__u32		nlmsg_pid;
};

/* Flags values */

#define NLM_F_REQUEST		0x01	/* It is request message. 	*/
#define NLM_F_MULTI		0x02	/* Multipart message, terminated by NLMSG_DONE */
#define NLM_F_ACK		0x04	/* Reply with ack, with zero or error code */
#define NLM_F_ECHO		0x08	/* Receive resulting notifications */
#define NLM_F_DUMP_INTR		0x10	/* Dump was inconsistent due to sequence change */
#define NLM_F_DUMP_FILTERED	0x20	/* Dump was filtered as requested */

/* Modifiers to GET request */
#define NLM_F_ROOT	0x100	/* specify tree	root	*/
#define NLM_F_MATCH	0x200	/* return all matching	*/
#define NLM_F_ATOMIC	0x400	/* atomic GET		*/
#define NLM_F_DUMP	(NLM_F_ROOT|NLM_F_MATCH)

/* Modifiers to NEW request */
#define NLM_F_REPLACE	0x100	/* Override existing		*/
#define NLM_F_EXCL	0x200	/* Do not touch, if it exists	*/
#define NLM_F_CREATE	0x400	/* Create, if it does not exist	*/
#define NLM_F_APPEND	0x800	/* Add to end of list		*/

/* Modifiers to DELETE request */
#define NLM_F_NONREC	0x100	/* Do not delete recursively	*/
#define NLM_F_BULK	0x200	/* Delete multiple objects	*/

/* Flags for ACK message */
#define NLM_F_CAPPED	0x100	/* request was capped */
#define NLM_F_ACK_TLVS	0x200	/* extended ACK TVLs were included */

/*
   4.4BSD ADD		NLM_F_CREATE|NLM_F_EXCL
   4.4BSD CHANGE	NLM_F_REPLACE

   True CHANGE		NLM_F_CREATE|NLM_F_REPLACE
   Append		NLM_F_CREATE
   Check		NLM_F_EXCL
 */

#define NLMSG_ALIGNTO	4U
#define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) )
#define NLMSG_HDRLEN	 ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr)))
#define NLMSG_LENGTH(len) ((len) + NLMSG_HDRLEN)
#define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len))
#define NLMSG_DATA(nlh)  ((void *)(((char *)nlh) + NLMSG_HDRLEN))
#define NLMSG_NEXT(nlh,len)	 ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \
				  (struct nlmsghdr *)(((char *)(nlh)) + \
				  NLMSG_ALIGN((nlh)->nlmsg_len)))
#define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \
			   (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \
			   (nlh)->nlmsg_len <= (len))
#define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len)))

#define NLMSG_NOOP		0x1	/* Nothing.		*/
#define NLMSG_ERROR		0x2	/* Error		*/
#define NLMSG_DONE		0x3	/* End of a dump	*/
#define NLMSG_OVERRUN		0x4	/* Data lost		*/

#define NLMSG_MIN_TYPE		0x10	/* < 0x10: reserved control messages */

struct nlmsgerr {
	int		error;
	struct nlmsghdr msg;
	/*
	 * followed by the message contents unless NETLINK_CAP_ACK was set
	 * or the ACK indicates success (error == 0)
	 * message length is aligned with NLMSG_ALIGN()
	 */
	/*
	 * followed by TLVs defined in enum nlmsgerr_attrs
	 * if NETLINK_EXT_ACK was set
	 */
};

/**
 * enum nlmsgerr_attrs - nlmsgerr attributes
 * @NLMSGERR_ATTR_UNUSED: unused
 * @NLMSGERR_ATTR_MSG: error message string (string)
 * @NLMSGERR_ATTR_OFFS: offset of the invalid attribute in the original
 *	 message, counting from the beginning of the header (u32)
 * @NLMSGERR_ATTR_COOKIE: arbitrary subsystem specific cookie to
 *	be used - in the success case - to identify a created
 *	object or operation or similar (binary)
 * @NLMSGERR_ATTR_POLICY: policy for a rejected attribute
 * @NLMSGERR_ATTR_MISS_TYPE: type of a missing required attribute,
 *	%NLMSGERR_ATTR_MISS_NEST will not be present if the attribute was
 *	missing at the message level
 * @NLMSGERR_ATTR_MISS_NEST: offset of the nest where attribute was missing
 * @__NLMSGERR_ATTR_MAX: number of attributes
 * @NLMSGERR_ATTR_MAX: highest attribute number
 */
enum nlmsgerr_attrs {
	NLMSGERR_ATTR_UNUSED,
	NLMSGERR_ATTR_MSG,
	NLMSGERR_ATTR_OFFS,
	NLMSGERR_ATTR_COOKIE,
	NLMSGERR_ATTR_POLICY,
	NLMSGERR_ATTR_MISS_TYPE,
	NLMSGERR_ATTR_MISS_NEST,

	__NLMSGERR_ATTR_MAX,
	NLMSGERR_ATTR_MAX = __NLMSGERR_ATTR_MAX - 1
};

#define NETLINK_ADD_MEMBERSHIP		1
#define NETLINK_DROP_MEMBERSHIP		2
#define NETLINK_PKTINFO			3
#define NETLINK_BROADCAST_ERROR		4
#define NETLINK_NO_ENOBUFS		5
#ifndef __KERNEL__
#define NETLINK_RX_RING			6
#define NETLINK_TX_RING			7
#endif
#define NETLINK_LISTEN_ALL_NSID		8
#define NETLINK_LIST_MEMBERSHIPS	9
#define NETLINK_CAP_ACK			10
#define NETLINK_EXT_ACK			11
#define NETLINK_GET_STRICT_CHK		12

struct nl_pktinfo {
	__u32	group;
};

struct nl_mmap_req {
	unsigned int	nm_block_size;
	unsigned int	nm_block_nr;
	unsigned int	nm_frame_size;
	unsigned int	nm_frame_nr;
};

struct nl_mmap_hdr {
	unsigned int	nm_status;
	unsigned int	nm_len;
	__u32		nm_group;
	/* credentials */
	__u32		nm_pid;
	__u32		nm_uid;
	__u32		nm_gid;
};

#ifndef __KERNEL__
enum nl_mmap_status {
	NL_MMAP_STATUS_UNUSED,
	NL_MMAP_STATUS_RESERVED,
	NL_MMAP_STATUS_VALID,
	NL_MMAP_STATUS_COPY,
	NL_MMAP_STATUS_SKIP,
};

#define NL_MMAP_MSG_ALIGNMENT		NLMSG_ALIGNTO
#define NL_MMAP_MSG_ALIGN(sz)		__ALIGN_KERNEL(sz, NL_MMAP_MSG_ALIGNMENT)
#define NL_MMAP_HDRLEN			NL_MMAP_MSG_ALIGN(sizeof(struct nl_mmap_hdr))
#endif

#define NET_MAJOR 36		/* Major 36 is reserved for networking 						*/

enum {
	NETLINK_UNCONNECTED = 0,
	NETLINK_CONNECTED,
};

/*
 *  <------- NLA_HDRLEN ------> <-- NLA_ALIGN(payload)-->
 * +---------------------+- - -+- - - - - - - - - -+- - -+
 * |        Header       | Pad |     Payload       | Pad |
 * |   (struct nlattr)   | ing |                   | ing |
 * +---------------------+- - -+- - - - - - - - - -+- - -+
 *  <-------------- nlattr->nla_len -------------->
 */

struct nlattr {
	__u16           nla_len;
	__u16           nla_type;
};

/*
 * nla_type (16 bits)
 * +---+---+-------------------------------+
 * | N | O | Attribute Type                |
 * +---+---+-------------------------------+
 * N := Carries nested attributes
 * O := Payload stored in network byte order
 *
 * Note: The N and O flag are mutually exclusive.
 */
#define NLA_F_NESTED		(1 << 15)
#define NLA_F_NET_BYTEORDER	(1 << 14)
#define NLA_TYPE_MASK		~(NLA_F_NESTED | NLA_F_NET_BYTEORDER)

#define NLA_ALIGNTO		4
#define NLA_ALIGN(len)		(((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1))
#define NLA_HDRLEN		((int) NLA_ALIGN(sizeof(struct nlattr)))

/* Generic 32 bitflags attribute content sent to the kernel.
 *
 * The value is a bitmap that defines the values being set
 * The selector is a bitmask that defines which value is legit
 *
 * Examples:
 *  value = 0x0, and selector = 0x1
 *  implies we are selecting bit 1 and we want to set its value to 0.
 *
 *  value = 0x2, and selector = 0x2
 *  implies we are selecting bit 2 and we want to set its value to 1.
 *
 */
struct nla_bitfield32 {
	__u32 value;
	__u32 selector;
};

/*
 * policy descriptions - it's specific to each family how this is used
 * Normally, it should be retrieved via a dump inside another attribute
 * specifying where it applies.
 */

/**
 * enum netlink_attribute_type - type of an attribute
 * @NL_ATTR_TYPE_INVALID: unused
 * @NL_ATTR_TYPE_FLAG: flag attribute (present/not present)
 * @NL_ATTR_TYPE_U8: 8-bit unsigned attribute
 * @NL_ATTR_TYPE_U16: 16-bit unsigned attribute
 * @NL_ATTR_TYPE_U32: 32-bit unsigned attribute
 * @NL_ATTR_TYPE_U64: 64-bit unsigned attribute
 * @NL_ATTR_TYPE_S8: 8-bit signed attribute
 * @NL_ATTR_TYPE_S16: 16-bit signed attribute
 * @NL_ATTR_TYPE_S32: 32-bit signed attribute
 * @NL_ATTR_TYPE_S64: 64-bit signed attribute
 * @NL_ATTR_TYPE_BINARY: binary data, min/max length may be specified
 * @NL_ATTR_TYPE_STRING: string, min/max length may be specified
 * @NL_ATTR_TYPE_NUL_STRING: NUL-terminated string,
 *	min/max length may be specified
 * @NL_ATTR_TYPE_NESTED: nested, i.e. the content of this attribute
 *	consists of sub-attributes. The nested policy and maxtype
 *	inside may be specified.
 * @NL_ATTR_TYPE_NESTED_ARRAY: nested array, i.e. the content of this
 *	attribute contains sub-attributes whose type is irrelevant
 *	(just used to separate the array entries) and each such array
 *	entry has attributes again, the policy for those inner ones
 *	and the corresponding maxtype may be specified.
 * @NL_ATTR_TYPE_BITFIELD32: &struct nla_bitfield32 attribute
 * @NL_ATTR_TYPE_SINT: 32-bit or 64-bit signed attribute, aligned to 4B
 * @NL_ATTR_TYPE_UINT: 32-bit or 64-bit unsigned attribute, aligned to 4B
 */
enum netlink_attribute_type {
	NL_ATTR_TYPE_INVALID,

	NL_ATTR_TYPE_FLAG,

	NL_ATTR_TYPE_U8,
	NL_ATTR_TYPE_U16,
	NL_ATTR_TYPE_U32,
	NL_ATTR_TYPE_U64,

	NL_ATTR_TYPE_S8,
	NL_ATTR_TYPE_S16,
	NL_ATTR_TYPE_S32,
	NL_ATTR_TYPE_S64,

	NL_ATTR_TYPE_BINARY,
	NL_ATTR_TYPE_STRING,
	NL_ATTR_TYPE_NUL_STRING,

	NL_ATTR_TYPE_NESTED,
	NL_ATTR_TYPE_NESTED_ARRAY,

	NL_ATTR_TYPE_BITFIELD32,

	NL_ATTR_TYPE_SINT,
	NL_ATTR_TYPE_UINT,
};

/**
 * enum netlink_policy_type_attr - policy type attributes
 * @NL_POLICY_TYPE_ATTR_UNSPEC: unused
 * @NL_POLICY_TYPE_ATTR_TYPE: type of the attribute,
 *	&enum netlink_attribute_type (U32)
 * @NL_POLICY_TYPE_ATTR_MIN_VALUE_S: minimum value for signed
 *	integers (S64)
 * @NL_POLICY_TYPE_ATTR_MAX_VALUE_S: maximum value for signed
 *	integers (S64)
 * @NL_POLICY_TYPE_ATTR_MIN_VALUE_U: minimum value for unsigned
 *	integers (U64)
 * @NL_POLICY_TYPE_ATTR_MAX_VALUE_U: maximum value for unsigned
 *	integers (U64)
 * @NL_POLICY_TYPE_ATTR_MIN_LENGTH: minimum length for binary
 *	attributes, no minimum if not given (U32)
 * @NL_POLICY_TYPE_ATTR_MAX_LENGTH: maximum length for binary
 *	attributes, no maximum if not given (U32)
 * @NL_POLICY_TYPE_ATTR_POLICY_IDX: sub policy for nested and
 *	nested array types (U32)
 * @NL_POLICY_TYPE_ATTR_POLICY_MAXTYPE: maximum sub policy
 *	attribute for nested and nested array types, this can
 *	in theory be < the size of the policy pointed to by
 *	the index, if limited inside the nesting (U32)
 * @NL_POLICY_TYPE_ATTR_BITFIELD32_MASK: valid mask for the
 *	bitfield32 type (U32)
 * @NL_POLICY_TYPE_ATTR_MASK: mask of valid bits for unsigned integers (U64)
 * @NL_POLICY_TYPE_ATTR_PAD: pad attribute for 64-bit alignment
 *
 * @__NL_POLICY_TYPE_ATTR_MAX: number of attributes
 * @NL_POLICY_TYPE_ATTR_MAX: highest attribute number
 */
enum netlink_policy_type_attr {
	NL_POLICY_TYPE_ATTR_UNSPEC,
	NL_POLICY_TYPE_ATTR_TYPE,
	NL_POLICY_TYPE_ATTR_MIN_VALUE_S,
	NL_POLICY_TYPE_ATTR_MAX_VALUE_S,
	NL_POLICY_TYPE_ATTR_MIN_VALUE_U,
	NL_POLICY_TYPE_ATTR_MAX_VALUE_U,
	NL_POLICY_TYPE_ATTR_MIN_LENGTH,
	NL_POLICY_TYPE_ATTR_MAX_LENGTH,
	NL_POLICY_TYPE_ATTR_POLICY_IDX,
	NL_POLICY_TYPE_ATTR_POLICY_MAXTYPE,
	NL_POLICY_TYPE_ATTR_BITFIELD32_MASK,
	NL_POLICY_TYPE_ATTR_PAD,
	NL_POLICY_TYPE_ATTR_MASK,

	/* keep last */
	__NL_POLICY_TYPE_ATTR_MAX,
	NL_POLICY_TYPE_ATTR_MAX = __NL_POLICY_TYPE_ATTR_MAX - 1
};

#endif /* _UAPI__LINUX_NETLINK_H */
Commit	Line	Data
6f52b16c	1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
607ca46e DH	2	#ifndef _UAPI__LINUX_NETLINK_H
	3	#define _UAPI__LINUX_NETLINK_H
	4
a85cbe61	5	#include <linux/const.h>
607ca46e DH	6	#include <linux/socket.h> /* for __kernel_sa_family_t */
	7	#include <linux/types.h>
	8
	9	#define NETLINK_ROUTE 0 /* Routing/device hook */
	10	#define NETLINK_UNUSED 1 /* Unused number */
	11	#define NETLINK_USERSOCK 2 /* Reserved for user mode socket protocols */
	12	#define NETLINK_FIREWALL 3 /* Unused number, formerly ip_queue */
	13	#define NETLINK_SOCK_DIAG 4 /* socket monitoring */
	14	#define NETLINK_NFLOG 5 /* netfilter/iptables ULOG */
	15	#define NETLINK_XFRM 6 /* ipsec */
	16	#define NETLINK_SELINUX 7 /* SELinux event notifications */
	17	#define NETLINK_ISCSI 8 /* Open-iSCSI */
	18	#define NETLINK_AUDIT 9 /* auditing */
	19	#define NETLINK_FIB_LOOKUP 10
	20	#define NETLINK_CONNECTOR 11
	21	#define NETLINK_NETFILTER 12 /* netfilter subsystem */
	22	#define NETLINK_IP6_FW 13
1202cdd6	23	#define NETLINK_DNRTMSG 14 /* DECnet routing messages (obsolete) */
607ca46e DH	24	#define NETLINK_KOBJECT_UEVENT 15 /* Kernel messages to userspace */
	25	#define NETLINK_GENERIC 16
	26	/* leave room for NETLINK_DM (DM Events) */
	27	#define NETLINK_SCSITRANSPORT 18 /* SCSI Transports */
	28	#define NETLINK_ECRYPTFS 19
	29	#define NETLINK_RDMA 20
	30	#define NETLINK_CRYPTO 21 /* Crypto layer */
f16a7dd5	31	#define NETLINK_SMC 22 /* SMC monitoring */
607ca46e DH	32
	33	#define NETLINK_INET_DIAG NETLINK_SOCK_DIAG
	34
	35	#define MAX_LINKS 32
	36
	37	struct sockaddr_nl {
	38	__kernel_sa_family_t nl_family; /* AF_NETLINK */
	39	unsigned short nl_pad; /* zero */
	40	__u32 nl_pid; /* port ID */
	41	__u32 nl_groups; /* multicast groups mask */
	42	};
	43
30b60554 JK	44	/**
	45	* struct nlmsghdr - fixed format metadata header of Netlink messages
	46	* @nlmsg_len: Length of message including header
	47	* @nlmsg_type: Message content type
	48	* @nlmsg_flags: Additional flags
	49	* @nlmsg_seq: Sequence number
	50	* @nlmsg_pid: Sending process port ID
	51	*/
607ca46e	52	struct nlmsghdr {
30b60554 JK	53	__u32 nlmsg_len;
	54	__u16 nlmsg_type;
	55	__u16 nlmsg_flags;
	56	__u32 nlmsg_seq;
	57	__u32 nlmsg_pid;
607ca46e DH	58	};
	59
	60	/* Flags values */
	61
261a0a54 JB	62	#define NLM_F_REQUEST 0x01 /* It is request message. */
	63	#define NLM_F_MULTI 0x02 /* Multipart message, terminated by NLMSG_DONE */
	64	#define NLM_F_ACK 0x04 /* Reply with ack, with zero or error code */
5493a2ad	65	#define NLM_F_ECHO 0x08 /* Receive resulting notifications */
261a0a54 JB	66	#define NLM_F_DUMP_INTR 0x10 /* Dump was inconsistent due to sequence change */
261a0a54 JB	67	#define NLM_F_DUMP_FILTERED 0x20 /* Dump was filtered as requested */
607ca46e DH	68
	69	/* Modifiers to GET request */
	70	#define NLM_F_ROOT 0x100 /* specify tree root */
	71	#define NLM_F_MATCH 0x200 /* return all matching */
	72	#define NLM_F_ATOMIC 0x400 /* atomic GET */
	73	#define NLM_F_DUMP (NLM_F_ROOT\|NLM_F_MATCH)
	74
	75	/* Modifiers to NEW request */
	76	#define NLM_F_REPLACE 0x100 /* Override existing */
	77	#define NLM_F_EXCL 0x200 /* Do not touch, if it exists */
	78	#define NLM_F_CREATE 0x400 /* Create, if it does not exist */
	79	#define NLM_F_APPEND 0x800 /* Add to end of list */
	80
2335ba70 PNA	81	/* Modifiers to DELETE request */
2335ba70 PNA	82	#define NLM_F_NONREC 0x100 /* Do not delete recursively */
545528d7	83	#define NLM_F_BULK 0x200 /* Delete multiple objects */
2335ba70	84
2d4bc933 JB	85	/* Flags for ACK message */
	86	#define NLM_F_CAPPED 0x100 /* request was capped */
	87	#define NLM_F_ACK_TLVS 0x200 /* extended ACK TVLs were included */
	88
607ca46e DH	89	/*
	90	4.4BSD ADD NLM_F_CREATE\|NLM_F_EXCL
	91	4.4BSD CHANGE NLM_F_REPLACE
	92
	93	True CHANGE NLM_F_CREATE\|NLM_F_REPLACE
	94	Append NLM_F_CREATE
	95	Check NLM_F_EXCL
	96	*/
	97
	98	#define NLMSG_ALIGNTO 4U
	99	#define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) )
	100	#define NLMSG_HDRLEN ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr)))
a88b9ce5	101	#define NLMSG_LENGTH(len) ((len) + NLMSG_HDRLEN)
607ca46e	102	#define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len))
d409989b	103	#define NLMSG_DATA(nlh) ((void )(((char )nlh) + NLMSG_HDRLEN))
607ca46e	104	#define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \
d409989b CL	105	(struct nlmsghdr )(((char )(nlh)) + \
d409989b CL	106	NLMSG_ALIGN((nlh)->nlmsg_len)))
607ca46e DH	107	#define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \
	108	(nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \
	109	(nlh)->nlmsg_len <= (len))
	110	#define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len)))
	111
	112	#define NLMSG_NOOP 0x1 /* Nothing. */
	113	#define NLMSG_ERROR 0x2 /* Error */
	114	#define NLMSG_DONE 0x3 /* End of a dump */
	115	#define NLMSG_OVERRUN 0x4 /* Data lost */
	116
	117	#define NLMSG_MIN_TYPE 0x10 /* < 0x10: reserved control messages */
	118
	119	struct nlmsgerr {
	120	int error;
	121	struct nlmsghdr msg;
2d4bc933 JB	122	/*
	123	* followed by the message contents unless NETLINK_CAP_ACK was set
	124	* or the ACK indicates success (error == 0)
	125	* message length is aligned with NLMSG_ALIGN()
	126	*/
	127	/*
	128	* followed by TLVs defined in enum nlmsgerr_attrs
	129	* if NETLINK_EXT_ACK was set
	130	*/
	131	};
	132
	133	/**
	134	* enum nlmsgerr_attrs - nlmsgerr attributes
	135	* @NLMSGERR_ATTR_UNUSED: unused
	136	* @NLMSGERR_ATTR_MSG: error message string (string)
	137	* @NLMSGERR_ATTR_OFFS: offset of the invalid attribute in the original
	138	* message, counting from the beginning of the header (u32)
ba0dc5f6 JB	139	* @NLMSGERR_ATTR_COOKIE: arbitrary subsystem specific cookie to
	140	* be used - in the success case - to identify a created
	141	* object or operation or similar (binary)
44f3625b	142	* @NLMSGERR_ATTR_POLICY: policy for a rejected attribute
690252f1 JK	143	* @NLMSGERR_ATTR_MISS_TYPE: type of a missing required attribute,
	144	* %NLMSGERR_ATTR_MISS_NEST will not be present if the attribute was
	145	* missing at the message level
	146	* @NLMSGERR_ATTR_MISS_NEST: offset of the nest where attribute was missing
2d4bc933 JB	147	* @__NLMSGERR_ATTR_MAX: number of attributes
	148	* @NLMSGERR_ATTR_MAX: highest attribute number
	149	*/
	150	enum nlmsgerr_attrs {
	151	NLMSGERR_ATTR_UNUSED,
	152	NLMSGERR_ATTR_MSG,
	153	NLMSGERR_ATTR_OFFS,
ba0dc5f6	154	NLMSGERR_ATTR_COOKIE,
44f3625b	155	NLMSGERR_ATTR_POLICY,
690252f1 JK	156	NLMSGERR_ATTR_MISS_TYPE,
690252f1 JK	157	NLMSGERR_ATTR_MISS_NEST,
2d4bc933 JB	158
	159	__NLMSGERR_ATTR_MAX,
	160	NLMSGERR_ATTR_MAX = __NLMSGERR_ATTR_MAX - 1
607ca46e DH	161	};
607ca46e DH	162
b42be38b DR	163	#define NETLINK_ADD_MEMBERSHIP 1
	164	#define NETLINK_DROP_MEMBERSHIP 2
	165	#define NETLINK_PKTINFO 3
	166	#define NETLINK_BROADCAST_ERROR 4
	167	#define NETLINK_NO_ENOBUFS 5
d1b4c689	168	#ifndef __KERNEL__
b42be38b DR	169	#define NETLINK_RX_RING 6
b42be38b DR	170	#define NETLINK_TX_RING 7
d1b4c689	171	#endif
b42be38b DR	172	#define NETLINK_LISTEN_ALL_NSID 8
b42be38b DR	173	#define NETLINK_LIST_MEMBERSHIPS 9
0a6a3a23	174	#define NETLINK_CAP_ACK 10
2d4bc933	175	#define NETLINK_EXT_ACK 11
d3e8869e	176	#define NETLINK_GET_STRICT_CHK 12
607ca46e DH	177
	178	struct nl_pktinfo {
	179	__u32 group;
	180	};
	181
ccdfcc39 PM	182	struct nl_mmap_req {
	183	unsigned int nm_block_size;
	184	unsigned int nm_block_nr;
	185	unsigned int nm_frame_size;
	186	unsigned int nm_frame_nr;
	187	};
	188
	189	struct nl_mmap_hdr {
	190	unsigned int nm_status;
	191	unsigned int nm_len;
	192	__u32 nm_group;
	193	/* credentials */
	194	__u32 nm_pid;
	195	__u32 nm_uid;
	196	__u32 nm_gid;
	197	};
	198
d1b4c689	199	#ifndef __KERNEL__
ccdfcc39 PM	200	enum nl_mmap_status {
	201	NL_MMAP_STATUS_UNUSED,
	202	NL_MMAP_STATUS_RESERVED,
	203	NL_MMAP_STATUS_VALID,
	204	NL_MMAP_STATUS_COPY,
	205	NL_MMAP_STATUS_SKIP,
	206	};
	207
	208	#define NL_MMAP_MSG_ALIGNMENT NLMSG_ALIGNTO
	209	#define NL_MMAP_MSG_ALIGN(sz) __ALIGN_KERNEL(sz, NL_MMAP_MSG_ALIGNMENT)
	210	#define NL_MMAP_HDRLEN NL_MMAP_MSG_ALIGN(sizeof(struct nl_mmap_hdr))
d1b4c689	211	#endif
ccdfcc39	212
607ca46e DH	213	#define NET_MAJOR 36 /* Major 36 is reserved for networking */
	214
	215	enum {
	216	NETLINK_UNCONNECTED = 0,
	217	NETLINK_CONNECTED,
	218	};
	219
	220	/*
	221	* <------- NLA_HDRLEN ------> <-- NLA_ALIGN(payload)-->
	222	* +---------------------+- - -+- - - - - - - - - -+- - -+
	223	* \| Header \| Pad \| Payload \| Pad \|
	224	* \| (struct nlattr) \| ing \| \| ing \|
	225	* +---------------------+- - -+- - - - - - - - - -+- - -+
	226	* <-------------- nlattr->nla_len -------------->
	227	*/
	228
	229	struct nlattr {
	230	__u16 nla_len;
	231	__u16 nla_type;
	232	};
	233
	234	/*
	235	* nla_type (16 bits)
	236	* +---+---+-------------------------------+
	237	* \| N \| O \| Attribute Type \|
	238	* +---+---+-------------------------------+
	239	* N := Carries nested attributes
	240	* O := Payload stored in network byte order
	241	*
	242	* Note: The N and O flag are mutually exclusive.
	243	*/
	244	#define NLA_F_NESTED (1 << 15)
	245	#define NLA_F_NET_BYTEORDER (1 << 14)
	246	#define NLA_TYPE_MASK ~(NLA_F_NESTED \| NLA_F_NET_BYTEORDER)
	247
	248	#define NLA_ALIGNTO 4
	249	#define NLA_ALIGN(len) (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1))
	250	#define NLA_HDRLEN ((int) NLA_ALIGN(sizeof(struct nlattr)))
	251
64c83d83 JHS	252	/* Generic 32 bitflags attribute content sent to the kernel.
	253	*
	254	* The value is a bitmap that defines the values being set
	255	* The selector is a bitmask that defines which value is legit
	256	*
	257	* Examples:
	258	* value = 0x0, and selector = 0x1
	259	* implies we are selecting bit 1 and we want to set its value to 0.
	260	*
	261	* value = 0x2, and selector = 0x2
	262	* implies we are selecting bit 2 and we want to set its value to 1.
	263	*
	264	*/
	265	struct nla_bitfield32 {
	266	__u32 value;
	267	__u32 selector;
	268	};
607ca46e	269
d07dcf9a JB	270	/*
	271	* policy descriptions - it's specific to each family how this is used
	272	* Normally, it should be retrieved via a dump inside another attribute
	273	* specifying where it applies.
	274	*/
	275
	276	/**
	277	* enum netlink_attribute_type - type of an attribute
	278	* @NL_ATTR_TYPE_INVALID: unused
	279	* @NL_ATTR_TYPE_FLAG: flag attribute (present/not present)
	280	* @NL_ATTR_TYPE_U8: 8-bit unsigned attribute
	281	* @NL_ATTR_TYPE_U16: 16-bit unsigned attribute
	282	* @NL_ATTR_TYPE_U32: 32-bit unsigned attribute
	283	* @NL_ATTR_TYPE_U64: 64-bit unsigned attribute
	284	* @NL_ATTR_TYPE_S8: 8-bit signed attribute
	285	* @NL_ATTR_TYPE_S16: 16-bit signed attribute
	286	* @NL_ATTR_TYPE_S32: 32-bit signed attribute
	287	* @NL_ATTR_TYPE_S64: 64-bit signed attribute
	288	* @NL_ATTR_TYPE_BINARY: binary data, min/max length may be specified
	289	* @NL_ATTR_TYPE_STRING: string, min/max length may be specified
	290	* @NL_ATTR_TYPE_NUL_STRING: NUL-terminated string,
	291	* min/max length may be specified
	292	* @NL_ATTR_TYPE_NESTED: nested, i.e. the content of this attribute
	293	* consists of sub-attributes. The nested policy and maxtype
	294	* inside may be specified.
	295	* @NL_ATTR_TYPE_NESTED_ARRAY: nested array, i.e. the content of this
	296	* attribute contains sub-attributes whose type is irrelevant
	297	* (just used to separate the array entries) and each such array
	298	* entry has attributes again, the policy for those inner ones
	299	* and the corresponding maxtype may be specified.
	300	* @NL_ATTR_TYPE_BITFIELD32: &struct nla_bitfield32 attribute
374d345d JK	301	* @NL_ATTR_TYPE_SINT: 32-bit or 64-bit signed attribute, aligned to 4B
374d345d JK	302	* @NL_ATTR_TYPE_UINT: 32-bit or 64-bit unsigned attribute, aligned to 4B
d07dcf9a JB	303	*/
	304	enum netlink_attribute_type {
	305	NL_ATTR_TYPE_INVALID,
	306
	307	NL_ATTR_TYPE_FLAG,
	308
	309	NL_ATTR_TYPE_U8,
	310	NL_ATTR_TYPE_U16,
	311	NL_ATTR_TYPE_U32,
	312	NL_ATTR_TYPE_U64,
	313
	314	NL_ATTR_TYPE_S8,
	315	NL_ATTR_TYPE_S16,
	316	NL_ATTR_TYPE_S32,
	317	NL_ATTR_TYPE_S64,
	318
	319	NL_ATTR_TYPE_BINARY,
	320	NL_ATTR_TYPE_STRING,
	321	NL_ATTR_TYPE_NUL_STRING,
	322
	323	NL_ATTR_TYPE_NESTED,
	324	NL_ATTR_TYPE_NESTED_ARRAY,
	325
	326	NL_ATTR_TYPE_BITFIELD32,
374d345d JK	327
	328	NL_ATTR_TYPE_SINT,
	329	NL_ATTR_TYPE_UINT,
d07dcf9a JB	330	};
	331
	332	/**
	333	* enum netlink_policy_type_attr - policy type attributes
	334	* @NL_POLICY_TYPE_ATTR_UNSPEC: unused
	335	* @NL_POLICY_TYPE_ATTR_TYPE: type of the attribute,
	336	* &enum netlink_attribute_type (U32)
	337	* @NL_POLICY_TYPE_ATTR_MIN_VALUE_S: minimum value for signed
	338	* integers (S64)
	339	* @NL_POLICY_TYPE_ATTR_MAX_VALUE_S: maximum value for signed
	340	* integers (S64)
	341	* @NL_POLICY_TYPE_ATTR_MIN_VALUE_U: minimum value for unsigned
	342	* integers (U64)
	343	* @NL_POLICY_TYPE_ATTR_MAX_VALUE_U: maximum value for unsigned
	344	* integers (U64)
	345	* @NL_POLICY_TYPE_ATTR_MIN_LENGTH: minimum length for binary
	346	* attributes, no minimum if not given (U32)
	347	* @NL_POLICY_TYPE_ATTR_MAX_LENGTH: maximum length for binary
	348	* attributes, no maximum if not given (U32)
	349	* @NL_POLICY_TYPE_ATTR_POLICY_IDX: sub policy for nested and
	350	* nested array types (U32)
	351	* @NL_POLICY_TYPE_ATTR_POLICY_MAXTYPE: maximum sub policy
	352	* attribute for nested and nested array types, this can
	353	* in theory be < the size of the policy pointed to by
	354	* the index, if limited inside the nesting (U32)
	355	* @NL_POLICY_TYPE_ATTR_BITFIELD32_MASK: valid mask for the
	356	* bitfield32 type (U32)
bdbb4e29	357	* @NL_POLICY_TYPE_ATTR_MASK: mask of valid bits for unsigned integers (U64)
d07dcf9a	358	* @NL_POLICY_TYPE_ATTR_PAD: pad attribute for 64-bit alignment
30b60554 JK	359	*
	360	* @__NL_POLICY_TYPE_ATTR_MAX: number of attributes
	361	* @NL_POLICY_TYPE_ATTR_MAX: highest attribute number
d07dcf9a JB	362	*/
	363	enum netlink_policy_type_attr {
	364	NL_POLICY_TYPE_ATTR_UNSPEC,
	365	NL_POLICY_TYPE_ATTR_TYPE,
	366	NL_POLICY_TYPE_ATTR_MIN_VALUE_S,
	367	NL_POLICY_TYPE_ATTR_MAX_VALUE_S,
	368	NL_POLICY_TYPE_ATTR_MIN_VALUE_U,
	369	NL_POLICY_TYPE_ATTR_MAX_VALUE_U,
	370	NL_POLICY_TYPE_ATTR_MIN_LENGTH,
	371	NL_POLICY_TYPE_ATTR_MAX_LENGTH,
	372	NL_POLICY_TYPE_ATTR_POLICY_IDX,
	373	NL_POLICY_TYPE_ATTR_POLICY_MAXTYPE,
	374	NL_POLICY_TYPE_ATTR_BITFIELD32_MASK,
	375	NL_POLICY_TYPE_ATTR_PAD,
bdbb4e29	376	NL_POLICY_TYPE_ATTR_MASK,
d07dcf9a JB	377
	378	/* keep last */
	379	__NL_POLICY_TYPE_ATTR_MAX,
	380	NL_POLICY_TYPE_ATTR_MAX = __NL_POLICY_TYPE_ATTR_MAX - 1
	381	};
	382
607ca46e	383	#endif /* _UAPI__LINUX_NETLINK_H */