252 lines
7.7 KiB
C
252 lines
7.7 KiB
C
/* 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/kernel.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_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_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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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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#endif /* _UAPI__LINUX_NETLINK_H */
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