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359 lines
11 KiB
359 lines
11 KiB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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#ifndef _UAPI__LINUX_NETLINK_H |
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#define _UAPI__LINUX_NETLINK_H |
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#include <linux/const.h> |
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#include <linux/socket.h> /* for __kernel_sa_family_t */ |
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#include <linux/types.h> |
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#define NETLINK_ROUTE 0 /* Routing/device hook */ |
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#define NETLINK_UNUSED 1 /* Unused number */ |
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#define NETLINK_USERSOCK 2 /* Reserved for user mode socket protocols */ |
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#define NETLINK_FIREWALL 3 /* Unused number, formerly ip_queue */ |
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#define NETLINK_SOCK_DIAG 4 /* socket monitoring */ |
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#define NETLINK_NFLOG 5 /* netfilter/iptables ULOG */ |
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#define NETLINK_XFRM 6 /* ipsec */ |
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#define NETLINK_SELINUX 7 /* SELinux event notifications */ |
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#define NETLINK_ISCSI 8 /* Open-iSCSI */ |
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#define NETLINK_AUDIT 9 /* auditing */ |
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#define NETLINK_FIB_LOOKUP 10 |
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#define NETLINK_CONNECTOR 11 |
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#define NETLINK_NETFILTER 12 /* netfilter subsystem */ |
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#define NETLINK_IP6_FW 13 |
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#define NETLINK_DNRTMSG 14 /* DECnet routing messages */ |
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#define NETLINK_KOBJECT_UEVENT 15 /* Kernel messages to userspace */ |
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#define NETLINK_GENERIC 16 |
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/* leave room for NETLINK_DM (DM Events) */ |
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#define NETLINK_SCSITRANSPORT 18 /* SCSI Transports */ |
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#define NETLINK_ECRYPTFS 19 |
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#define NETLINK_RDMA 20 |
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#define NETLINK_CRYPTO 21 /* Crypto layer */ |
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#define NETLINK_SMC 22 /* SMC monitoring */ |
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#define NETLINK_INET_DIAG NETLINK_SOCK_DIAG |
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#define MAX_LINKS 32 |
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struct sockaddr_nl { |
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__kernel_sa_family_t nl_family; /* AF_NETLINK */ |
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unsigned short nl_pad; /* zero */ |
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__u32 nl_pid; /* port ID */ |
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__u32 nl_groups; /* multicast groups mask */ |
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}; |
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struct nlmsghdr { |
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__u32 nlmsg_len; /* Length of message including header */ |
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__u16 nlmsg_type; /* Message content */ |
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__u16 nlmsg_flags; /* Additional flags */ |
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__u32 nlmsg_seq; /* Sequence number */ |
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__u32 nlmsg_pid; /* Sending process port ID */ |
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}; |
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/* Flags values */ |
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#define NLM_F_REQUEST 0x01 /* It is request message. */ |
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#define NLM_F_MULTI 0x02 /* Multipart message, terminated by NLMSG_DONE */ |
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#define NLM_F_ACK 0x04 /* Reply with ack, with zero or error code */ |
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#define NLM_F_ECHO 0x08 /* Echo this request */ |
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#define NLM_F_DUMP_INTR 0x10 /* Dump was inconsistent due to sequence change */ |
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#define NLM_F_DUMP_FILTERED 0x20 /* Dump was filtered as requested */ |
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/* Modifiers to GET request */ |
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#define NLM_F_ROOT 0x100 /* specify tree root */ |
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#define NLM_F_MATCH 0x200 /* return all matching */ |
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#define NLM_F_ATOMIC 0x400 /* atomic GET */ |
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#define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH) |
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/* Modifiers to NEW request */ |
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#define NLM_F_REPLACE 0x100 /* Override existing */ |
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#define NLM_F_EXCL 0x200 /* Do not touch, if it exists */ |
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#define NLM_F_CREATE 0x400 /* Create, if it does not exist */ |
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#define NLM_F_APPEND 0x800 /* Add to end of list */ |
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/* Modifiers to DELETE request */ |
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#define NLM_F_NONREC 0x100 /* Do not delete recursively */ |
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/* Flags for ACK message */ |
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#define NLM_F_CAPPED 0x100 /* request was capped */ |
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#define NLM_F_ACK_TLVS 0x200 /* extended ACK TVLs were included */ |
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/* |
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4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL |
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4.4BSD CHANGE NLM_F_REPLACE |
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True CHANGE NLM_F_CREATE|NLM_F_REPLACE |
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Append NLM_F_CREATE |
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Check NLM_F_EXCL |
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*/ |
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#define NLMSG_ALIGNTO 4U |
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#define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) ) |
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#define NLMSG_HDRLEN ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr))) |
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#define NLMSG_LENGTH(len) ((len) + NLMSG_HDRLEN) |
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#define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len)) |
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#define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0))) |
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#define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \ |
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(struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len))) |
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#define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \ |
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(nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \ |
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(nlh)->nlmsg_len <= (len)) |
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#define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len))) |
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#define NLMSG_NOOP 0x1 /* Nothing. */ |
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#define NLMSG_ERROR 0x2 /* Error */ |
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#define NLMSG_DONE 0x3 /* End of a dump */ |
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#define NLMSG_OVERRUN 0x4 /* Data lost */ |
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#define NLMSG_MIN_TYPE 0x10 /* < 0x10: reserved control messages */ |
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struct nlmsgerr { |
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int error; |
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struct nlmsghdr msg; |
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/* |
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* followed by the message contents unless NETLINK_CAP_ACK was set |
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* or the ACK indicates success (error == 0) |
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* message length is aligned with NLMSG_ALIGN() |
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*/ |
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/* |
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* followed by TLVs defined in enum nlmsgerr_attrs |
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* if NETLINK_EXT_ACK was set |
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*/ |
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}; |
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/** |
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* enum nlmsgerr_attrs - nlmsgerr attributes |
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* @NLMSGERR_ATTR_UNUSED: unused |
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* @NLMSGERR_ATTR_MSG: error message string (string) |
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* @NLMSGERR_ATTR_OFFS: offset of the invalid attribute in the original |
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* message, counting from the beginning of the header (u32) |
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* @NLMSGERR_ATTR_COOKIE: arbitrary subsystem specific cookie to |
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* be used - in the success case - to identify a created |
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* object or operation or similar (binary) |
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* @NLMSGERR_ATTR_POLICY: policy for a rejected attribute |
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* @__NLMSGERR_ATTR_MAX: number of attributes |
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* @NLMSGERR_ATTR_MAX: highest attribute number |
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*/ |
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enum nlmsgerr_attrs { |
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NLMSGERR_ATTR_UNUSED, |
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NLMSGERR_ATTR_MSG, |
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NLMSGERR_ATTR_OFFS, |
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NLMSGERR_ATTR_COOKIE, |
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NLMSGERR_ATTR_POLICY, |
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__NLMSGERR_ATTR_MAX, |
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NLMSGERR_ATTR_MAX = __NLMSGERR_ATTR_MAX - 1 |
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}; |
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#define NETLINK_ADD_MEMBERSHIP 1 |
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#define NETLINK_DROP_MEMBERSHIP 2 |
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#define NETLINK_PKTINFO 3 |
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#define NETLINK_BROADCAST_ERROR 4 |
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#define NETLINK_NO_ENOBUFS 5 |
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#ifndef __KERNEL__ |
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#define NETLINK_RX_RING 6 |
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#define NETLINK_TX_RING 7 |
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#endif |
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#define NETLINK_LISTEN_ALL_NSID 8 |
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#define NETLINK_LIST_MEMBERSHIPS 9 |
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#define NETLINK_CAP_ACK 10 |
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#define NETLINK_EXT_ACK 11 |
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#define NETLINK_GET_STRICT_CHK 12 |
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struct nl_pktinfo { |
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__u32 group; |
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}; |
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struct nl_mmap_req { |
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unsigned int nm_block_size; |
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unsigned int nm_block_nr; |
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unsigned int nm_frame_size; |
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unsigned int nm_frame_nr; |
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}; |
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struct nl_mmap_hdr { |
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unsigned int nm_status; |
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unsigned int nm_len; |
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__u32 nm_group; |
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/* credentials */ |
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__u32 nm_pid; |
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__u32 nm_uid; |
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__u32 nm_gid; |
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}; |
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#ifndef __KERNEL__ |
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enum nl_mmap_status { |
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NL_MMAP_STATUS_UNUSED, |
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NL_MMAP_STATUS_RESERVED, |
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NL_MMAP_STATUS_VALID, |
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NL_MMAP_STATUS_COPY, |
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NL_MMAP_STATUS_SKIP, |
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}; |
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#define NL_MMAP_MSG_ALIGNMENT NLMSG_ALIGNTO |
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#define NL_MMAP_MSG_ALIGN(sz) __ALIGN_KERNEL(sz, NL_MMAP_MSG_ALIGNMENT) |
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#define NL_MMAP_HDRLEN NL_MMAP_MSG_ALIGN(sizeof(struct nl_mmap_hdr)) |
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#endif |
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#define NET_MAJOR 36 /* Major 36 is reserved for networking */ |
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enum { |
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NETLINK_UNCONNECTED = 0, |
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NETLINK_CONNECTED, |
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}; |
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/* |
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* <------- NLA_HDRLEN ------> <-- NLA_ALIGN(payload)--> |
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* +---------------------+- - -+- - - - - - - - - -+- - -+ |
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* | Header | Pad | Payload | Pad | |
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* | (struct nlattr) | ing | | ing | |
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* +---------------------+- - -+- - - - - - - - - -+- - -+ |
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* <-------------- nlattr->nla_len --------------> |
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*/ |
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struct nlattr { |
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__u16 nla_len; |
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__u16 nla_type; |
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}; |
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/* |
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* nla_type (16 bits) |
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* +---+---+-------------------------------+ |
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* | N | O | Attribute Type | |
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* +---+---+-------------------------------+ |
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* N := Carries nested attributes |
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* O := Payload stored in network byte order |
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* |
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* Note: The N and O flag are mutually exclusive. |
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*/ |
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#define NLA_F_NESTED (1 << 15) |
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#define NLA_F_NET_BYTEORDER (1 << 14) |
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#define NLA_TYPE_MASK ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER) |
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#define NLA_ALIGNTO 4 |
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#define NLA_ALIGN(len) (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1)) |
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#define NLA_HDRLEN ((int) NLA_ALIGN(sizeof(struct nlattr))) |
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/* Generic 32 bitflags attribute content sent to the kernel. |
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* |
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* The value is a bitmap that defines the values being set |
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* The selector is a bitmask that defines which value is legit |
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* |
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* Examples: |
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* value = 0x0, and selector = 0x1 |
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* implies we are selecting bit 1 and we want to set its value to 0. |
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* |
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* value = 0x2, and selector = 0x2 |
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* implies we are selecting bit 2 and we want to set its value to 1. |
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* |
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*/ |
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struct nla_bitfield32 { |
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__u32 value; |
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__u32 selector; |
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}; |
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/* |
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* policy descriptions - it's specific to each family how this is used |
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* Normally, it should be retrieved via a dump inside another attribute |
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* specifying where it applies. |
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*/ |
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/** |
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* enum netlink_attribute_type - type of an attribute |
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* @NL_ATTR_TYPE_INVALID: unused |
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* @NL_ATTR_TYPE_FLAG: flag attribute (present/not present) |
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* @NL_ATTR_TYPE_U8: 8-bit unsigned attribute |
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* @NL_ATTR_TYPE_U16: 16-bit unsigned attribute |
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* @NL_ATTR_TYPE_U32: 32-bit unsigned attribute |
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* @NL_ATTR_TYPE_U64: 64-bit unsigned attribute |
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* @NL_ATTR_TYPE_S8: 8-bit signed attribute |
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* @NL_ATTR_TYPE_S16: 16-bit signed attribute |
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* @NL_ATTR_TYPE_S32: 32-bit signed attribute |
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* @NL_ATTR_TYPE_S64: 64-bit signed attribute |
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* @NL_ATTR_TYPE_BINARY: binary data, min/max length may be specified |
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* @NL_ATTR_TYPE_STRING: string, min/max length may be specified |
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* @NL_ATTR_TYPE_NUL_STRING: NUL-terminated string, |
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* min/max length may be specified |
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* @NL_ATTR_TYPE_NESTED: nested, i.e. the content of this attribute |
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* consists of sub-attributes. The nested policy and maxtype |
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* inside may be specified. |
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* @NL_ATTR_TYPE_NESTED_ARRAY: nested array, i.e. the content of this |
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* attribute contains sub-attributes whose type is irrelevant |
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* (just used to separate the array entries) and each such array |
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* entry has attributes again, the policy for those inner ones |
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* and the corresponding maxtype may be specified. |
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* @NL_ATTR_TYPE_BITFIELD32: &struct nla_bitfield32 attribute |
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*/ |
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enum netlink_attribute_type { |
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NL_ATTR_TYPE_INVALID, |
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NL_ATTR_TYPE_FLAG, |
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NL_ATTR_TYPE_U8, |
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NL_ATTR_TYPE_U16, |
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NL_ATTR_TYPE_U32, |
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NL_ATTR_TYPE_U64, |
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NL_ATTR_TYPE_S8, |
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NL_ATTR_TYPE_S16, |
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NL_ATTR_TYPE_S32, |
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NL_ATTR_TYPE_S64, |
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NL_ATTR_TYPE_BINARY, |
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NL_ATTR_TYPE_STRING, |
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NL_ATTR_TYPE_NUL_STRING, |
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NL_ATTR_TYPE_NESTED, |
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NL_ATTR_TYPE_NESTED_ARRAY, |
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NL_ATTR_TYPE_BITFIELD32, |
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}; |
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/** |
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* enum netlink_policy_type_attr - policy type attributes |
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* @NL_POLICY_TYPE_ATTR_UNSPEC: unused |
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* @NL_POLICY_TYPE_ATTR_TYPE: type of the attribute, |
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* &enum netlink_attribute_type (U32) |
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* @NL_POLICY_TYPE_ATTR_MIN_VALUE_S: minimum value for signed |
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* integers (S64) |
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* @NL_POLICY_TYPE_ATTR_MAX_VALUE_S: maximum value for signed |
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* integers (S64) |
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* @NL_POLICY_TYPE_ATTR_MIN_VALUE_U: minimum value for unsigned |
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* integers (U64) |
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* @NL_POLICY_TYPE_ATTR_MAX_VALUE_U: maximum value for unsigned |
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* integers (U64) |
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* @NL_POLICY_TYPE_ATTR_MIN_LENGTH: minimum length for binary |
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* attributes, no minimum if not given (U32) |
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* @NL_POLICY_TYPE_ATTR_MAX_LENGTH: maximum length for binary |
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* attributes, no maximum if not given (U32) |
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* @NL_POLICY_TYPE_ATTR_POLICY_IDX: sub policy for nested and |
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* nested array types (U32) |
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* @NL_POLICY_TYPE_ATTR_POLICY_MAXTYPE: maximum sub policy |
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* attribute for nested and nested array types, this can |
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* in theory be < the size of the policy pointed to by |
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* the index, if limited inside the nesting (U32) |
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* @NL_POLICY_TYPE_ATTR_BITFIELD32_MASK: valid mask for the |
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* bitfield32 type (U32) |
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* @NL_POLICY_TYPE_ATTR_MASK: mask of valid bits for unsigned integers (U64) |
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* @NL_POLICY_TYPE_ATTR_PAD: pad attribute for 64-bit alignment |
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*/ |
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enum netlink_policy_type_attr { |
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NL_POLICY_TYPE_ATTR_UNSPEC, |
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NL_POLICY_TYPE_ATTR_TYPE, |
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NL_POLICY_TYPE_ATTR_MIN_VALUE_S, |
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NL_POLICY_TYPE_ATTR_MAX_VALUE_S, |
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NL_POLICY_TYPE_ATTR_MIN_VALUE_U, |
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NL_POLICY_TYPE_ATTR_MAX_VALUE_U, |
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NL_POLICY_TYPE_ATTR_MIN_LENGTH, |
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NL_POLICY_TYPE_ATTR_MAX_LENGTH, |
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NL_POLICY_TYPE_ATTR_POLICY_IDX, |
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NL_POLICY_TYPE_ATTR_POLICY_MAXTYPE, |
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NL_POLICY_TYPE_ATTR_BITFIELD32_MASK, |
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NL_POLICY_TYPE_ATTR_PAD, |
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NL_POLICY_TYPE_ATTR_MASK, |
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/* keep last */ |
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__NL_POLICY_TYPE_ATTR_MAX, |
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NL_POLICY_TYPE_ATTR_MAX = __NL_POLICY_TYPE_ATTR_MAX - 1 |
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}; |
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#endif /* _UAPI__LINUX_NETLINK_H */
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