172339Sabial/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 272339Sabial#ifndef _UAPI__LINUX_NETLINK_H 372339Sabial#define _UAPI__LINUX_NETLINK_H 472339Sabial 572339Sabial#include <linux/const.h> 672339Sabial#include <linux/socket.h> /* for __kernel_sa_family_t */ 772339Sabial#include <linux/types.h> 872339Sabial 972339Sabial#define NETLINK_ROUTE 0 /* Routing/device hook */ 1072339Sabial#define NETLINK_UNUSED 1 /* Unused number */ 1172339Sabial#define NETLINK_USERSOCK 2 /* Reserved for user mode socket protocols */ 1272339Sabial#define NETLINK_FIREWALL 3 /* Unused number, formerly ip_queue */ 1372339Sabial#define NETLINK_SOCK_DIAG 4 /* socket monitoring */ 1472339Sabial#define NETLINK_NFLOG 5 /* netfilter/iptables ULOG */ 1572339Sabial#define NETLINK_XFRM 6 /* ipsec */ 1672339Sabial#define NETLINK_SELINUX 7 /* SELinux event notifications */ 1772339Sabial#define NETLINK_ISCSI 8 /* Open-iSCSI */ 1872339Sabial#define NETLINK_AUDIT 9 /* auditing */ 1972339Sabial#define NETLINK_FIB_LOOKUP 10 2072339Sabial#define NETLINK_CONNECTOR 11 2172339Sabial#define NETLINK_NETFILTER 12 /* netfilter subsystem */ 2272339Sabial#define NETLINK_IP6_FW 13 2372339Sabial#define NETLINK_DNRTMSG 14 /* DECnet routing messages (obsolete) */ 2472339Sabial#define NETLINK_KOBJECT_UEVENT 15 /* Kernel messages to userspace */ 2572339Sabial#define NETLINK_GENERIC 16 2672339Sabial/* leave room for NETLINK_DM (DM Events) */ 2772339Sabial#define NETLINK_SCSITRANSPORT 18 /* SCSI Transports */ 2872339Sabial#define NETLINK_ECRYPTFS 19 2972339Sabial#define NETLINK_RDMA 20 3072339Sabial#define NETLINK_CRYPTO 21 /* Crypto layer */ 3172339Sabial#define NETLINK_SMC 22 /* SMC monitoring */ 3272339Sabial 3372339Sabial#define NETLINK_INET_DIAG NETLINK_SOCK_DIAG 3472339Sabial 3572339Sabial#define MAX_LINKS 32 3672339Sabial 3772339Sabialstruct sockaddr_nl { 3872339Sabial __kernel_sa_family_t nl_family; /* AF_NETLINK */ 3972339Sabial unsigned short nl_pad; /* zero */ 4072339Sabial __u32 nl_pid; /* port ID */ 4172339Sabial __u32 nl_groups; /* multicast groups mask */ 4272339Sabial}; 4372339Sabial 4472339Sabial/** 4572339Sabial * struct nlmsghdr - fixed format metadata header of Netlink messages 4672339Sabial * @nlmsg_len: Length of message including header 4772339Sabial * @nlmsg_type: Message content type 4872339Sabial * @nlmsg_flags: Additional flags 4972339Sabial * @nlmsg_seq: Sequence number 5072339Sabial * @nlmsg_pid: Sending process port ID 5172339Sabial */ 5272339Sabialstruct nlmsghdr { 5372339Sabial __u32 nlmsg_len; 5472339Sabial __u16 nlmsg_type; 5572339Sabial __u16 nlmsg_flags; 5672339Sabial __u32 nlmsg_seq; 5772339Sabial __u32 nlmsg_pid; 5872339Sabial}; 5972339Sabial 6072339Sabial/* Flags values */ 6172339Sabial 6272339Sabial#define NLM_F_REQUEST 0x01 /* It is request message. */ 6372339Sabial#define NLM_F_MULTI 0x02 /* Multipart message, terminated by NLMSG_DONE */ 6472339Sabial#define NLM_F_ACK 0x04 /* Reply with ack, with zero or error code */ 6572339Sabial#define NLM_F_ECHO 0x08 /* Receive resulting notifications */ 6672339Sabial#define NLM_F_DUMP_INTR 0x10 /* Dump was inconsistent due to sequence change */ 6772339Sabial#define NLM_F_DUMP_FILTERED 0x20 /* Dump was filtered as requested */ 6872339Sabial 6972339Sabial/* Modifiers to GET request */ 7072339Sabial#define NLM_F_ROOT 0x100 /* specify tree root */ 7172339Sabial#define NLM_F_MATCH 0x200 /* return all matching */ 7272339Sabial#define NLM_F_ATOMIC 0x400 /* atomic GET */ 7372339Sabial#define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH) 7472339Sabial 7572339Sabial/* Modifiers to NEW request */ 7672339Sabial#define NLM_F_REPLACE 0x100 /* Override existing */ 7772339Sabial#define NLM_F_EXCL 0x200 /* Do not touch, if it exists */ 7872339Sabial#define NLM_F_CREATE 0x400 /* Create, if it does not exist */ 7972339Sabial#define NLM_F_APPEND 0x800 /* Add to end of list */ 8072339Sabial 8172339Sabial/* Modifiers to DELETE request */ 8272339Sabial#define NLM_F_NONREC 0x100 /* Do not delete recursively */ 8372339Sabial#define NLM_F_BULK 0x200 /* Delete multiple objects */ 8472339Sabial 8572339Sabial/* Flags for ACK message */ 8672339Sabial#define NLM_F_CAPPED 0x100 /* request was capped */ 8772339Sabial#define NLM_F_ACK_TLVS 0x200 /* extended ACK TVLs were included */ 8872339Sabial 8972339Sabial/* 9072339Sabial 4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL 9172339Sabial 4.4BSD CHANGE NLM_F_REPLACE 9272339Sabial 9372339Sabial True CHANGE NLM_F_CREATE|NLM_F_REPLACE 9472339Sabial Append NLM_F_CREATE 9572339Sabial Check NLM_F_EXCL 9672339Sabial */ 9772339Sabial 9872339Sabial#define NLMSG_ALIGNTO 4U 9972339Sabial#define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) ) 10072339Sabial#define NLMSG_HDRLEN ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr))) 10172339Sabial#define NLMSG_LENGTH(len) ((len) + NLMSG_HDRLEN) 10272339Sabial#define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len)) 10372339Sabial#define NLMSG_DATA(nlh) ((void *)(((char *)nlh) + NLMSG_HDRLEN)) 10472339Sabial#define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \ 10572339Sabial (struct nlmsghdr *)(((char *)(nlh)) + \ 10672339Sabial NLMSG_ALIGN((nlh)->nlmsg_len))) 10772339Sabial#define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \ 10872339Sabial (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \ 10972339Sabial (nlh)->nlmsg_len <= (len)) 11072339Sabial#define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len))) 11172339Sabial 11272339Sabial#define NLMSG_NOOP 0x1 /* Nothing. */ 11372339Sabial#define NLMSG_ERROR 0x2 /* Error */ 11472339Sabial#define NLMSG_DONE 0x3 /* End of a dump */ 11572339Sabial#define NLMSG_OVERRUN 0x4 /* Data lost */ 11672339Sabial 11772339Sabial#define NLMSG_MIN_TYPE 0x10 /* < 0x10: reserved control messages */ 11872339Sabial 11972339Sabialstruct nlmsgerr { 12072339Sabial int error; 12172339Sabial struct nlmsghdr msg; 12272339Sabial /* 12372339Sabial * followed by the message contents unless NETLINK_CAP_ACK was set 12472339Sabial * or the ACK indicates success (error == 0) 12572339Sabial * message length is aligned with NLMSG_ALIGN() 12672339Sabial */ 12772339Sabial /* 12872339Sabial * followed by TLVs defined in enum nlmsgerr_attrs 12972339Sabial * if NETLINK_EXT_ACK was set 13072339Sabial */ 13172339Sabial}; 13272339Sabial 13372339Sabial/** 13472339Sabial * enum nlmsgerr_attrs - nlmsgerr attributes 13572339Sabial * @NLMSGERR_ATTR_UNUSED: unused 13672339Sabial * @NLMSGERR_ATTR_MSG: error message string (string) 13772339Sabial * @NLMSGERR_ATTR_OFFS: offset of the invalid attribute in the original 13872339Sabial * message, counting from the beginning of the header (u32) 13972339Sabial * @NLMSGERR_ATTR_COOKIE: arbitrary subsystem specific cookie to 14072339Sabial * be used - in the success case - to identify a created 14172339Sabial * object or operation or similar (binary) 14272339Sabial * @NLMSGERR_ATTR_POLICY: policy for a rejected attribute 14372339Sabial * @NLMSGERR_ATTR_MISS_TYPE: type of a missing required attribute, 14472339Sabial * %NLMSGERR_ATTR_MISS_NEST will not be present if the attribute was 14572339Sabial * missing at the message level 14672339Sabial * @NLMSGERR_ATTR_MISS_NEST: offset of the nest where attribute was missing 14772339Sabial * @__NLMSGERR_ATTR_MAX: number of attributes 14872339Sabial * @NLMSGERR_ATTR_MAX: highest attribute number 14972339Sabial */ 15072339Sabialenum nlmsgerr_attrs { 15172339Sabial NLMSGERR_ATTR_UNUSED, 15272339Sabial NLMSGERR_ATTR_MSG, 15372339Sabial NLMSGERR_ATTR_OFFS, 15472339Sabial NLMSGERR_ATTR_COOKIE, 15572339Sabial NLMSGERR_ATTR_POLICY, 15672339Sabial NLMSGERR_ATTR_MISS_TYPE, 15772339Sabial NLMSGERR_ATTR_MISS_NEST, 15872339Sabial 15972339Sabial __NLMSGERR_ATTR_MAX, 16072339Sabial NLMSGERR_ATTR_MAX = __NLMSGERR_ATTR_MAX - 1 16172339Sabial}; 16272339Sabial 16372339Sabial#define NETLINK_ADD_MEMBERSHIP 1 16472339Sabial#define NETLINK_DROP_MEMBERSHIP 2 16572339Sabial#define NETLINK_PKTINFO 3 16672339Sabial#define NETLINK_BROADCAST_ERROR 4 16772339Sabial#define NETLINK_NO_ENOBUFS 5 16872339Sabial#ifndef __KERNEL__ 16972339Sabial#define NETLINK_RX_RING 6 17072339Sabial#define NETLINK_TX_RING 7 17172339Sabial#endif 17272339Sabial#define NETLINK_LISTEN_ALL_NSID 8 17372339Sabial#define NETLINK_LIST_MEMBERSHIPS 9 17472339Sabial#define NETLINK_CAP_ACK 10 17572339Sabial#define NETLINK_EXT_ACK 11 17672339Sabial#define NETLINK_GET_STRICT_CHK 12 17772339Sabial 17872339Sabialstruct nl_pktinfo { 17972339Sabial __u32 group; 18072339Sabial}; 18172339Sabial 18272339Sabialstruct nl_mmap_req { 18372339Sabial unsigned int nm_block_size; 18472339Sabial unsigned int nm_block_nr; 18572339Sabial unsigned int nm_frame_size; 18672339Sabial unsigned int nm_frame_nr; 18772339Sabial}; 18872339Sabial 18972339Sabialstruct nl_mmap_hdr { 19072339Sabial unsigned int nm_status; 19172339Sabial unsigned int nm_len; 19272339Sabial __u32 nm_group; 19372339Sabial /* credentials */ 19472339Sabial __u32 nm_pid; 19572339Sabial __u32 nm_uid; 19672339Sabial __u32 nm_gid; 19772339Sabial}; 19872339Sabial 19972339Sabial#ifndef __KERNEL__ 20072339Sabialenum nl_mmap_status { 20172339Sabial NL_MMAP_STATUS_UNUSED, 20272339Sabial NL_MMAP_STATUS_RESERVED, 20372339Sabial NL_MMAP_STATUS_VALID, 20472339Sabial NL_MMAP_STATUS_COPY, 20572339Sabial NL_MMAP_STATUS_SKIP, 20672339Sabial}; 20772339Sabial 20872339Sabial#define NL_MMAP_MSG_ALIGNMENT NLMSG_ALIGNTO 20972339Sabial#define NL_MMAP_MSG_ALIGN(sz) __ALIGN_KERNEL(sz, NL_MMAP_MSG_ALIGNMENT) 21072339Sabial#define NL_MMAP_HDRLEN NL_MMAP_MSG_ALIGN(sizeof(struct nl_mmap_hdr)) 21172339Sabial#endif 21272339Sabial 21372339Sabial#define NET_MAJOR 36 /* Major 36 is reserved for networking */ 21472339Sabial 21572339Sabialenum { 21672339Sabial NETLINK_UNCONNECTED = 0, 21772339Sabial NETLINK_CONNECTED, 21872339Sabial}; 21972339Sabial 22072339Sabial/* 22172339Sabial * <------- NLA_HDRLEN ------> <-- NLA_ALIGN(payload)--> 22272339Sabial * +---------------------+- - -+- - - - - - - - - -+- - -+ 22372339Sabial * | Header | Pad | Payload | Pad | 22472339Sabial * | (struct nlattr) | ing | | ing | 22572339Sabial * +---------------------+- - -+- - - - - - - - - -+- - -+ 22672339Sabial * <-------------- nlattr->nla_len --------------> 22772339Sabial */ 22872339Sabial 22972339Sabialstruct nlattr { 23072339Sabial __u16 nla_len; 23172339Sabial __u16 nla_type; 23272339Sabial}; 23372339Sabial 23472339Sabial/* 23572339Sabial * nla_type (16 bits) 23672339Sabial * +---+---+-------------------------------+ 23772339Sabial * | N | O | Attribute Type | 23872339Sabial * +---+---+-------------------------------+ 23972339Sabial * N := Carries nested attributes 24072339Sabial * O := Payload stored in network byte order 24172339Sabial * 24272339Sabial * Note: The N and O flag are mutually exclusive. 24372339Sabial */ 24472339Sabial#define NLA_F_NESTED (1 << 15) 24572339Sabial#define NLA_F_NET_BYTEORDER (1 << 14) 24672339Sabial#define NLA_TYPE_MASK ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER) 24772339Sabial 24872339Sabial#define NLA_ALIGNTO 4 24972339Sabial#define NLA_ALIGN(len) (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1)) 25072339Sabial#define NLA_HDRLEN ((int) NLA_ALIGN(sizeof(struct nlattr))) 25172339Sabial 25272339Sabial/* Generic 32 bitflags attribute content sent to the kernel. 25372339Sabial * 25472339Sabial * The value is a bitmap that defines the values being set 25572339Sabial * The selector is a bitmask that defines which value is legit 25672339Sabial * 25772339Sabial * Examples: 25872339Sabial * value = 0x0, and selector = 0x1 25972339Sabial * implies we are selecting bit 1 and we want to set its value to 0. 26072339Sabial * 26172339Sabial * value = 0x2, and selector = 0x2 26272339Sabial * implies we are selecting bit 2 and we want to set its value to 1. 26372339Sabial * 26472339Sabial */ 26572339Sabialstruct nla_bitfield32 { 26672339Sabial __u32 value; 26772339Sabial __u32 selector; 26872339Sabial}; 26972339Sabial 27072339Sabial/* 27172339Sabial * policy descriptions - it's specific to each family how this is used 27272339Sabial * Normally, it should be retrieved via a dump inside another attribute 27372339Sabial * specifying where it applies. 27472339Sabial */ 27572339Sabial 27672339Sabial/** 27772339Sabial * enum netlink_attribute_type - type of an attribute 27872339Sabial * @NL_ATTR_TYPE_INVALID: unused 27972339Sabial * @NL_ATTR_TYPE_FLAG: flag attribute (present/not present) 28072339Sabial * @NL_ATTR_TYPE_U8: 8-bit unsigned attribute 28172339Sabial * @NL_ATTR_TYPE_U16: 16-bit unsigned attribute 28272339Sabial * @NL_ATTR_TYPE_U32: 32-bit unsigned attribute 28372339Sabial * @NL_ATTR_TYPE_U64: 64-bit unsigned attribute 28472339Sabial * @NL_ATTR_TYPE_S8: 8-bit signed attribute 28572339Sabial * @NL_ATTR_TYPE_S16: 16-bit signed attribute 28672339Sabial * @NL_ATTR_TYPE_S32: 32-bit signed attribute 28772339Sabial * @NL_ATTR_TYPE_S64: 64-bit signed attribute 28872339Sabial * @NL_ATTR_TYPE_BINARY: binary data, min/max length may be specified 28972339Sabial * @NL_ATTR_TYPE_STRING: string, min/max length may be specified 29072339Sabial * @NL_ATTR_TYPE_NUL_STRING: NUL-terminated string, 29172339Sabial * min/max length may be specified 29272339Sabial * @NL_ATTR_TYPE_NESTED: nested, i.e. the content of this attribute 29372339Sabial * consists of sub-attributes. The nested policy and maxtype 29472339Sabial * inside may be specified. 29572339Sabial * @NL_ATTR_TYPE_NESTED_ARRAY: nested array, i.e. the content of this 29672339Sabial * attribute contains sub-attributes whose type is irrelevant 29772339Sabial * (just used to separate the array entries) and each such array 29872339Sabial * entry has attributes again, the policy for those inner ones 29972339Sabial * and the corresponding maxtype may be specified. 30072339Sabial * @NL_ATTR_TYPE_BITFIELD32: &struct nla_bitfield32 attribute 30172339Sabial * @NL_ATTR_TYPE_SINT: 32-bit or 64-bit signed attribute, aligned to 4B 30272339Sabial * @NL_ATTR_TYPE_UINT: 32-bit or 64-bit unsigned attribute, aligned to 4B 30372339Sabial */ 30472339Sabialenum netlink_attribute_type { 30572339Sabial NL_ATTR_TYPE_INVALID, 30672339Sabial 30772339Sabial NL_ATTR_TYPE_FLAG, 30872339Sabial 30972339Sabial NL_ATTR_TYPE_U8, 31072339Sabial NL_ATTR_TYPE_U16, 31172339Sabial NL_ATTR_TYPE_U32, 31272339Sabial NL_ATTR_TYPE_U64, 31372339Sabial 31472339Sabial NL_ATTR_TYPE_S8, 31572339Sabial NL_ATTR_TYPE_S16, 31672339Sabial NL_ATTR_TYPE_S32, 31772339Sabial NL_ATTR_TYPE_S64, 31872339Sabial 31972339Sabial NL_ATTR_TYPE_BINARY, 32072339Sabial NL_ATTR_TYPE_STRING, 32172339Sabial NL_ATTR_TYPE_NUL_STRING, 32272339Sabial 32372339Sabial NL_ATTR_TYPE_NESTED, 32472339Sabial NL_ATTR_TYPE_NESTED_ARRAY, 32572339Sabial 32672339Sabial NL_ATTR_TYPE_BITFIELD32, 32772339Sabial 32872339Sabial NL_ATTR_TYPE_SINT, 32972339Sabial NL_ATTR_TYPE_UINT, 33072339Sabial}; 33172339Sabial 33272339Sabial/** 33372339Sabial * enum netlink_policy_type_attr - policy type attributes 33472339Sabial * @NL_POLICY_TYPE_ATTR_UNSPEC: unused 33572339Sabial * @NL_POLICY_TYPE_ATTR_TYPE: type of the attribute, 33672339Sabial * &enum netlink_attribute_type (U32) 33772339Sabial * @NL_POLICY_TYPE_ATTR_MIN_VALUE_S: minimum value for signed 33872339Sabial * integers (S64) 33972339Sabial * @NL_POLICY_TYPE_ATTR_MAX_VALUE_S: maximum value for signed 34072339Sabial * integers (S64) 34172339Sabial * @NL_POLICY_TYPE_ATTR_MIN_VALUE_U: minimum value for unsigned 34272339Sabial * integers (U64) 34372339Sabial * @NL_POLICY_TYPE_ATTR_MAX_VALUE_U: maximum value for unsigned 34472339Sabial * integers (U64) 34572339Sabial * @NL_POLICY_TYPE_ATTR_MIN_LENGTH: minimum length for binary 34672339Sabial * attributes, no minimum if not given (U32) 34772339Sabial * @NL_POLICY_TYPE_ATTR_MAX_LENGTH: maximum length for binary 34872339Sabial * attributes, no maximum if not given (U32) 34972339Sabial * @NL_POLICY_TYPE_ATTR_POLICY_IDX: sub policy for nested and 35072339Sabial * nested array types (U32) 35172339Sabial * @NL_POLICY_TYPE_ATTR_POLICY_MAXTYPE: maximum sub policy 35272339Sabial * attribute for nested and nested array types, this can 35372339Sabial * in theory be < the size of the policy pointed to by 35472339Sabial * the index, if limited inside the nesting (U32) 35572339Sabial * @NL_POLICY_TYPE_ATTR_BITFIELD32_MASK: valid mask for the 35672339Sabial * bitfield32 type (U32) 35772339Sabial * @NL_POLICY_TYPE_ATTR_MASK: mask of valid bits for unsigned integers (U64) 35872339Sabial * @NL_POLICY_TYPE_ATTR_PAD: pad attribute for 64-bit alignment 35972339Sabial * 36072339Sabial * @__NL_POLICY_TYPE_ATTR_MAX: number of attributes 36172339Sabial * @NL_POLICY_TYPE_ATTR_MAX: highest attribute number 36272339Sabial */ 36372339Sabialenum netlink_policy_type_attr { 36472339Sabial NL_POLICY_TYPE_ATTR_UNSPEC, 36572339Sabial NL_POLICY_TYPE_ATTR_TYPE, 36672339Sabial NL_POLICY_TYPE_ATTR_MIN_VALUE_S, 36772339Sabial NL_POLICY_TYPE_ATTR_MAX_VALUE_S, 36872339Sabial NL_POLICY_TYPE_ATTR_MIN_VALUE_U, 36972339Sabial NL_POLICY_TYPE_ATTR_MAX_VALUE_U, 37072339Sabial NL_POLICY_TYPE_ATTR_MIN_LENGTH, 37172339Sabial NL_POLICY_TYPE_ATTR_MAX_LENGTH, 37272339Sabial NL_POLICY_TYPE_ATTR_POLICY_IDX, 37372339Sabial NL_POLICY_TYPE_ATTR_POLICY_MAXTYPE, 37472339Sabial NL_POLICY_TYPE_ATTR_BITFIELD32_MASK, 37572339Sabial NL_POLICY_TYPE_ATTR_PAD, 37672339Sabial NL_POLICY_TYPE_ATTR_MASK, 37772339Sabial 37872339Sabial /* keep last */ 37972339Sabial __NL_POLICY_TYPE_ATTR_MAX, 38072339Sabial NL_POLICY_TYPE_ATTR_MAX = __NL_POLICY_TYPE_ATTR_MAX - 1 38172339Sabial}; 38272339Sabial 38372339Sabial#endif /* _UAPI__LINUX_NETLINK_H */ 38472339Sabial