/* 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 0 x01 /* It is request message. */
#define NLM_F_MULTI 0 x02 /* Multipart message, terminated by NLMSG_DONE */
#define NLM_F_ACK 0 x04 /* Reply with ack, with zero or error code */
#define NLM_F_ECHO 0 x08 /* Receive resulting notifications */
#define NLM_F_DUMP_INTR 0 x10 /* Dump was inconsistent due to sequence change */
#define NLM_F_DUMP_FILTERED 0 x20 /* Dump was filtered as requested */
/* Modifiers to GET request */
#define NLM_F_ROOT 0 x100 /* specify tree root */
#define NLM_F_MATCH 0 x200 /* return all matching */
#define NLM_F_ATOMIC 0 x400 /* atomic GET */
#define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH)
/* Modifiers to NEW request */
#define NLM_F_REPLACE 0 x100 /* Override existing */
#define NLM_F_EXCL 0 x200 /* Do not touch, if it exists */
#define NLM_F_CREATE 0 x400 /* Create, if it does not exist */
#define NLM_F_APPEND 0 x800 /* Add to end of list */
/* Modifiers to DELETE request */
#define NLM_F_NONREC 0 x100 /* Do not delete recursively */
#define NLM_F_BULK 0 x200 /* Delete multiple objects */
/* Flags for ACK message */
#define NLM_F_CAPPED 0 x100 /* request was capped */
#define NLM_F_ACK_TLVS 0 x200 /* extended ACK TVLs were included */
/*
4 . 4 BSD ADD NLM_F_CREATE | NLM_F_EXCL
4 . 4 BSD CHANGE NLM_F_REPLACE
True CHANGE NLM_F_CREATE | NLM_F_REPLACE
Append NLM_F_CREATE
Check NLM_F_EXCL
*/
#define NLMSG_ALIGNTO 4 U
#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 0 x1 /* Nothing. */
#define NLMSG_ERROR 0 x2 /* Error */
#define NLMSG_DONE 0 x3 /* End of a dump */
#define NLMSG_OVERRUN 0 x4 /* Data lost */
#define NLMSG_MIN_TYPE 0 x10 /* < 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 = 0 x0 , and selector = 0 x1
* implies we are selecting bit 1 and we want to set its value to 0 .
*
* value = 0 x2 , and selector = 0 x2
* 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 4 B
* @ NL_ATTR_TYPE_UINT : 32 - bit or 64 - bit unsigned attribute , aligned to 4 B
*/
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 */
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