/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */#ifndef _UAPI__LINUX_NETLINK_H#define _UAPI__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_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_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;}; #endif /* _UAPI__LINUX_NETLINK_H */