[mirror_iproute2.git] / include / uapi / linux / netlink.h

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

#include <linux/kernel.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 */
#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 {
	__u32		nlmsg_len;	/* Length of message including header */
	__u16		nlmsg_type;	/* Message content */
	__u16		nlmsg_flags;	/* Additional flags */
	__u32		nlmsg_seq;	/* Sequence number */
	__u32		nlmsg_pid;	/* Sending process port ID */
};

/* 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	/* Echo this request 		*/
#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	*/

/* 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_LENGTH(0)))
#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_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_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
#define NETLINK_RX_RING			6
#define NETLINK_TX_RING			7
#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;
};

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))

#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
 */
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,
};

/**
 * 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
 */
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 /* __LINUX_NETLINK_H */
Commit	Line	Data
ba914908	1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
910773dc SH	2	#ifndef __LINUX_NETLINK_H
910773dc SH	3	#define __LINUX_NETLINK_H
0633baa1	4
79e9a1db	5	#include <linux/kernel.h>
9044a454	6	#include <linux/socket.h> /* for __kernel_sa_family_t */
0633baa1 SH	7	#include <linux/types.h>
	8
	9	#define NETLINK_ROUTE 0 /* Routing/device hook */
1d35a127	10	#define NETLINK_UNUSED 1 /* Unused number */
0633baa1	11	#define NETLINK_USERSOCK 2 /* Reserved for user mode socket protocols */
5e4dc84f	12	#define NETLINK_FIREWALL 3 /* Unused number, formerly ip_queue */
a08d2590	13	#define NETLINK_SOCK_DIAG 4 /* socket monitoring */
0633baa1 SH	14	#define NETLINK_NFLOG 5 /* netfilter/iptables ULOG */
	15	#define NETLINK_XFRM 6 /* ipsec */
	16	#define NETLINK_SELINUX 7 /* SELinux event notifications */
351efcde	17	#define NETLINK_ISCSI 8 /* Open-iSCSI */
0633baa1	18	#define NETLINK_AUDIT 9 /* auditing */
6864c1e7	19	#define NETLINK_FIB_LOOKUP 10
2034ee97	20	#define NETLINK_CONNECTOR 11
6864c1e7	21	#define NETLINK_NETFILTER 12 /* netfilter subsystem */
0633baa1 SH	22	#define NETLINK_IP6_FW 13
0633baa1 SH	23	#define NETLINK_DNRTMSG 14 /* DECnet routing messages */
d639d9d1	24	#define NETLINK_KOBJECT_UEVENT 15 /* Kernel messages to userspace */
2034ee97	25	#define NETLINK_GENERIC 16
ead2ba70 SH	26	/* leave room for NETLINK_DM (DM Events) */
ead2ba70 SH	27	#define NETLINK_SCSITRANSPORT 18 /* SCSI Transports */
de3d12f4	28	#define NETLINK_ECRYPTFS 19
e760a19a	29	#define NETLINK_RDMA 20
9044a454	30	#define NETLINK_CRYPTO 21 /* Crypto layer */
e2ade8ce	31	#define NETLINK_SMC 22 /* SMC monitoring */
0633baa1	32
a08d2590 SH	33	#define NETLINK_INET_DIAG NETLINK_SOCK_DIAG
a08d2590 SH	34
0633baa1 SH	35	#define MAX_LINKS 32
0633baa1 SH	36
ab322673	37	struct sockaddr_nl {
707f612c	38	__kernel_sa_family_t nl_family; /* AF_NETLINK */
0633baa1	39	unsigned short nl_pad; /* zero */
de3d12f4	40	__u32 nl_pid; /* port ID */
0633baa1 SH	41	__u32 nl_groups; /* multicast groups mask */
	42	};
	43
ab322673	44	struct nlmsghdr {
0633baa1 SH	45	__u32 nlmsg_len; /* Length of message including header */
	46	__u16 nlmsg_type; /* Message content */
	47	__u16 nlmsg_flags; /* Additional flags */
	48	__u32 nlmsg_seq; /* Sequence number */
de3d12f4	49	__u32 nlmsg_pid; /* Sending process port ID */
0633baa1 SH	50	};
	51
	52	/* Flags values */
	53
2c6a0636 SH	54	#define NLM_F_REQUEST 0x01 /* It is request message. */
	55	#define NLM_F_MULTI 0x02 /* Multipart message, terminated by NLMSG_DONE */
	56	#define NLM_F_ACK 0x04 /* Reply with ack, with zero or error code */
	57	#define NLM_F_ECHO 0x08 /* Echo this request */
	58	#define NLM_F_DUMP_INTR 0x10 /* Dump was inconsistent due to sequence change */
	59	#define NLM_F_DUMP_FILTERED 0x20 /* Dump was filtered as requested */
0633baa1 SH	60
	61	/* Modifiers to GET request */
	62	#define NLM_F_ROOT 0x100 /* specify tree root */
	63	#define NLM_F_MATCH 0x200 /* return all matching */
	64	#define NLM_F_ATOMIC 0x400 /* atomic GET */
	65	#define NLM_F_DUMP (NLM_F_ROOT\|NLM_F_MATCH)
	66
	67	/* Modifiers to NEW request */
	68	#define NLM_F_REPLACE 0x100 /* Override existing */
	69	#define NLM_F_EXCL 0x200 /* Do not touch, if it exists */
	70	#define NLM_F_CREATE 0x400 /* Create, if it does not exist */
	71	#define NLM_F_APPEND 0x800 /* Add to end of list */
	72
4a5b3035 SH	73	/* Modifiers to DELETE request */
	74	#define NLM_F_NONREC 0x100 /* Do not delete recursively */
	75
2c6a0636 SH	76	/* Flags for ACK message */
	77	#define NLM_F_CAPPED 0x100 /* request was capped */
	78	#define NLM_F_ACK_TLVS 0x200 /* extended ACK TVLs were included */
	79
0633baa1 SH	80	/*
	81	4.4BSD ADD NLM_F_CREATE\|NLM_F_EXCL
	82	4.4BSD CHANGE NLM_F_REPLACE
	83
	84	True CHANGE NLM_F_CREATE\|NLM_F_REPLACE
	85	Append NLM_F_CREATE
	86	Check NLM_F_EXCL
	87	*/
	88
8552b387	89	#define NLMSG_ALIGNTO 4U
0633baa1	90	#define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) )
09954dc6	91	#define NLMSG_HDRLEN ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr)))
79e9a1db	92	#define NLMSG_LENGTH(len) ((len) + NLMSG_HDRLEN)
0633baa1 SH	93	#define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len))
	94	#define NLMSG_DATA(nlh) ((void)(((char)nlh) + NLMSG_LENGTH(0)))
	95	#define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \
	96	(struct nlmsghdr)(((char)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len)))
	97	#define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \
	98	(nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \
	99	(nlh)->nlmsg_len <= (len))
	100	#define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len)))
	101
	102	#define NLMSG_NOOP 0x1 /* Nothing. */
	103	#define NLMSG_ERROR 0x2 /* Error */
	104	#define NLMSG_DONE 0x3 /* End of a dump */
	105	#define NLMSG_OVERRUN 0x4 /* Data lost */
	106
09954dc6 SH	107	#define NLMSG_MIN_TYPE 0x10 /* < 0x10: reserved control messages */
09954dc6 SH	108
ab322673	109	struct nlmsgerr {
0633baa1 SH	110	int error;
0633baa1 SH	111	struct nlmsghdr msg;
2c6a0636 SH	112	/*
	113	* followed by the message contents unless NETLINK_CAP_ACK was set
	114	* or the ACK indicates success (error == 0)
	115	* message length is aligned with NLMSG_ALIGN()
	116	*/
	117	/*
	118	* followed by TLVs defined in enum nlmsgerr_attrs
	119	* if NETLINK_EXT_ACK was set
	120	*/
	121	};
	122
	123	/**
	124	* enum nlmsgerr_attrs - nlmsgerr attributes
	125	* @NLMSGERR_ATTR_UNUSED: unused
	126	* @NLMSGERR_ATTR_MSG: error message string (string)
	127	* @NLMSGERR_ATTR_OFFS: offset of the invalid attribute in the original
	128	* message, counting from the beginning of the header (u32)
	129	* @NLMSGERR_ATTR_COOKIE: arbitrary subsystem specific cookie to
	130	* be used - in the success case - to identify a created
	131	* object or operation or similar (binary)
f905191a	132	* @NLMSGERR_ATTR_POLICY: policy for a rejected attribute
2c6a0636 SH	133	* @__NLMSGERR_ATTR_MAX: number of attributes
	134	* @NLMSGERR_ATTR_MAX: highest attribute number
	135	*/
	136	enum nlmsgerr_attrs {
	137	NLMSGERR_ATTR_UNUSED,
	138	NLMSGERR_ATTR_MSG,
	139	NLMSGERR_ATTR_OFFS,
	140	NLMSGERR_ATTR_COOKIE,
f905191a	141	NLMSGERR_ATTR_POLICY,
2c6a0636 SH	142
	143	__NLMSGERR_ATTR_MAX,
	144	NLMSGERR_ATTR_MAX = __NLMSGERR_ATTR_MAX - 1
0633baa1 SH	145	};
0633baa1 SH	146
ff631c3a SH	147	#define NETLINK_ADD_MEMBERSHIP 1
	148	#define NETLINK_DROP_MEMBERSHIP 2
	149	#define NETLINK_PKTINFO 3
	150	#define NETLINK_BROADCAST_ERROR 4
	151	#define NETLINK_NO_ENOBUFS 5
	152	#define NETLINK_RX_RING 6
	153	#define NETLINK_TX_RING 7
	154	#define NETLINK_LISTEN_ALL_NSID 8
	155	#define NETLINK_LIST_MEMBERSHIPS 9
8d62f3e2	156	#define NETLINK_CAP_ACK 10
2c6a0636	157	#define NETLINK_EXT_ACK 11
fdce94d0	158	#define NETLINK_GET_STRICT_CHK 12
351efcde	159
ab322673	160	struct nl_pktinfo {
351efcde SH	161	__u32 group;
	162	};
	163
79e9a1db SH	164	struct nl_mmap_req {
	165	unsigned int nm_block_size;
	166	unsigned int nm_block_nr;
	167	unsigned int nm_frame_size;
	168	unsigned int nm_frame_nr;
	169	};
	170
	171	struct nl_mmap_hdr {
	172	unsigned int nm_status;
	173	unsigned int nm_len;
	174	__u32 nm_group;
	175	/* credentials */
	176	__u32 nm_pid;
	177	__u32 nm_uid;
	178	__u32 nm_gid;
	179	};
	180
	181	enum nl_mmap_status {
	182	NL_MMAP_STATUS_UNUSED,
	183	NL_MMAP_STATUS_RESERVED,
	184	NL_MMAP_STATUS_VALID,
	185	NL_MMAP_STATUS_COPY,
	186	NL_MMAP_STATUS_SKIP,
	187	};
	188
	189	#define NL_MMAP_MSG_ALIGNMENT NLMSG_ALIGNTO
	190	#define NL_MMAP_MSG_ALIGN(sz) __ALIGN_KERNEL(sz, NL_MMAP_MSG_ALIGNMENT)
	191	#define NL_MMAP_HDRLEN NL_MMAP_MSG_ALIGN(sizeof(struct nl_mmap_hdr))
	192
0633baa1 SH	193	#define NET_MAJOR 36 /* Major 36 is reserved for networking */
	194
	195	enum {
	196	NETLINK_UNCONNECTED = 0,
	197	NETLINK_CONNECTED,
	198	};
	199
09954dc6 SH	200	/*
	201	* <------- NLA_HDRLEN ------> <-- NLA_ALIGN(payload)-->
	202	* +---------------------+- - -+- - - - - - - - - -+- - -+
	203	* \| Header \| Pad \| Payload \| Pad \|
	204	* \| (struct nlattr) \| ing \| \| ing \|
	205	* +---------------------+- - -+- - - - - - - - - -+- - -+
	206	* <-------------- nlattr->nla_len -------------->
	207	*/
	208
ab322673	209	struct nlattr {
09954dc6 SH	210	__u16 nla_len;
	211	__u16 nla_type;
	212	};
	213
5472ac6f SH	214	/*
	215	* nla_type (16 bits)
	216	* +---+---+-------------------------------+
	217	* \| N \| O \| Attribute Type \|
	218	* +---+---+-------------------------------+
	219	* N := Carries nested attributes
	220	* O := Payload stored in network byte order
	221	*
	222	* Note: The N and O flag are mutually exclusive.
	223	*/
	224	#define NLA_F_NESTED (1 << 15)
	225	#define NLA_F_NET_BYTEORDER (1 << 14)
	226	#define NLA_TYPE_MASK ~(NLA_F_NESTED \| NLA_F_NET_BYTEORDER)
	227
09954dc6 SH	228	#define NLA_ALIGNTO 4
	229	#define NLA_ALIGN(len) (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1))
	230	#define NLA_HDRLEN ((int) NLA_ALIGN(sizeof(struct nlattr)))
	231
72e4ea5e SH	232	/* Generic 32 bitflags attribute content sent to the kernel.
	233	*
	234	* The value is a bitmap that defines the values being set
	235	* The selector is a bitmask that defines which value is legit
	236	*
	237	* Examples:
	238	* value = 0x0, and selector = 0x1
	239	* implies we are selecting bit 1 and we want to set its value to 0.
	240	*
	241	* value = 0x2, and selector = 0x2
	242	* implies we are selecting bit 2 and we want to set its value to 1.
	243	*
	244	*/
	245	struct nla_bitfield32 {
	246	__u32 value;
	247	__u32 selector;
	248	};
0633baa1	249
ae57e82d DA	250	/*
	251	* policy descriptions - it's specific to each family how this is used
	252	* Normally, it should be retrieved via a dump inside another attribute
	253	* specifying where it applies.
	254	*/
	255
	256	/**
	257	* enum netlink_attribute_type - type of an attribute
	258	* @NL_ATTR_TYPE_INVALID: unused
	259	* @NL_ATTR_TYPE_FLAG: flag attribute (present/not present)
	260	* @NL_ATTR_TYPE_U8: 8-bit unsigned attribute
	261	* @NL_ATTR_TYPE_U16: 16-bit unsigned attribute
	262	* @NL_ATTR_TYPE_U32: 32-bit unsigned attribute
	263	* @NL_ATTR_TYPE_U64: 64-bit unsigned attribute
	264	* @NL_ATTR_TYPE_S8: 8-bit signed attribute
	265	* @NL_ATTR_TYPE_S16: 16-bit signed attribute
	266	* @NL_ATTR_TYPE_S32: 32-bit signed attribute
	267	* @NL_ATTR_TYPE_S64: 64-bit signed attribute
	268	* @NL_ATTR_TYPE_BINARY: binary data, min/max length may be specified
	269	* @NL_ATTR_TYPE_STRING: string, min/max length may be specified
	270	* @NL_ATTR_TYPE_NUL_STRING: NUL-terminated string,
	271	* min/max length may be specified
	272	* @NL_ATTR_TYPE_NESTED: nested, i.e. the content of this attribute
	273	* consists of sub-attributes. The nested policy and maxtype
	274	* inside may be specified.
	275	* @NL_ATTR_TYPE_NESTED_ARRAY: nested array, i.e. the content of this
	276	* attribute contains sub-attributes whose type is irrelevant
	277	* (just used to separate the array entries) and each such array
	278	* entry has attributes again, the policy for those inner ones
	279	* and the corresponding maxtype may be specified.
	280	* @NL_ATTR_TYPE_BITFIELD32: &struct nla_bitfield32 attribute
	281	*/
	282	enum netlink_attribute_type {
	283	NL_ATTR_TYPE_INVALID,
	284
	285	NL_ATTR_TYPE_FLAG,
	286
	287	NL_ATTR_TYPE_U8,
	288	NL_ATTR_TYPE_U16,
	289	NL_ATTR_TYPE_U32,
	290	NL_ATTR_TYPE_U64,
	291
	292	NL_ATTR_TYPE_S8,
	293	NL_ATTR_TYPE_S16,
	294	NL_ATTR_TYPE_S32,
	295	NL_ATTR_TYPE_S64,
	296
	297	NL_ATTR_TYPE_BINARY,
	298	NL_ATTR_TYPE_STRING,
	299	NL_ATTR_TYPE_NUL_STRING,
	300
	301	NL_ATTR_TYPE_NESTED,
	302	NL_ATTR_TYPE_NESTED_ARRAY,
	303
	304	NL_ATTR_TYPE_BITFIELD32,
	305	};
	306
	307	/**
	308	* enum netlink_policy_type_attr - policy type attributes
	309	* @NL_POLICY_TYPE_ATTR_UNSPEC: unused
	310	* @NL_POLICY_TYPE_ATTR_TYPE: type of the attribute,
	311	* &enum netlink_attribute_type (U32)
	312	* @NL_POLICY_TYPE_ATTR_MIN_VALUE_S: minimum value for signed
	313	* integers (S64)
314	* @NL_POLICY_TYPE_ATTR_MAX_VALUE_S: maximum value for signed
315	* integers (S64)
316	* @NL_POLICY_TYPE_ATTR_MIN_VALUE_U: minimum value for unsigned
317	* integers (U64)
318	* @NL_POLICY_TYPE_ATTR_MAX_VALUE_U: maximum value for unsigned
319	* integers (U64)
320	* @NL_POLICY_TYPE_ATTR_MIN_LENGTH: minimum length for binary
321	* attributes, no minimum if not given (U32)
322	* @NL_POLICY_TYPE_ATTR_MAX_LENGTH: maximum length for binary
323	* attributes, no maximum if not given (U32)
324	* @NL_POLICY_TYPE_ATTR_POLICY_IDX: sub policy for nested and
325	* nested array types (U32)
326	* @NL_POLICY_TYPE_ATTR_POLICY_MAXTYPE: maximum sub policy
327	* attribute for nested and nested array types, this can
328	* in theory be < the size of the policy pointed to by
329	* the index, if limited inside the nesting (U32)
330	* @NL_POLICY_TYPE_ATTR_BITFIELD32_MASK: valid mask for the
331	* bitfield32 type (U32)
34be2d26	332	* @NL_POLICY_TYPE_ATTR_MASK: mask of valid bits for unsigned integers (U64)
ae57e82d DA	333	* @NL_POLICY_TYPE_ATTR_PAD: pad attribute for 64-bit alignment
	334	*/
	335	enum netlink_policy_type_attr {
	336	NL_POLICY_TYPE_ATTR_UNSPEC,
	337	NL_POLICY_TYPE_ATTR_TYPE,
	338	NL_POLICY_TYPE_ATTR_MIN_VALUE_S,
	339	NL_POLICY_TYPE_ATTR_MAX_VALUE_S,
	340	NL_POLICY_TYPE_ATTR_MIN_VALUE_U,
	341	NL_POLICY_TYPE_ATTR_MAX_VALUE_U,
	342	NL_POLICY_TYPE_ATTR_MIN_LENGTH,
	343	NL_POLICY_TYPE_ATTR_MAX_LENGTH,
	344	NL_POLICY_TYPE_ATTR_POLICY_IDX,
	345	NL_POLICY_TYPE_ATTR_POLICY_MAXTYPE,
	346	NL_POLICY_TYPE_ATTR_BITFIELD32_MASK,
	347	NL_POLICY_TYPE_ATTR_PAD,
34be2d26	348	NL_POLICY_TYPE_ATTR_MASK,
ae57e82d DA	349
	350	/* keep last */
	351	__NL_POLICY_TYPE_ATTR_MAX,
	352	NL_POLICY_TYPE_ATTR_MAX = __NL_POLICY_TYPE_ATTR_MAX - 1
	353	};
	354
910773dc	355	#endif /* __LINUX_NETLINK_H */