Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
1#ifndef _UAPI__LINUX_NETLINK_H
2#define _UAPI__LINUX_NETLINK_H
3
4#include <linux/kernel.h>
5#include <linux/socket.h> /* for __kernel_sa_family_t */
6#include <linux/types.h>
7
8#define NETLINK_ROUTE 0 /* Routing/device hook */
9#define NETLINK_UNUSED 1 /* Unused number */
10#define NETLINK_USERSOCK 2 /* Reserved for user mode socket protocols */
11#define NETLINK_FIREWALL 3 /* Unused number, formerly ip_queue */
12#define NETLINK_SOCK_DIAG 4 /* socket monitoring */
13#define NETLINK_NFLOG 5 /* netfilter/iptables ULOG */
14#define NETLINK_XFRM 6 /* ipsec */
15#define NETLINK_SELINUX 7 /* SELinux event notifications */
16#define NETLINK_ISCSI 8 /* Open-iSCSI */
17#define NETLINK_AUDIT 9 /* auditing */
18#define NETLINK_FIB_LOOKUP 10
19#define NETLINK_CONNECTOR 11
20#define NETLINK_NETFILTER 12 /* netfilter subsystem */
21#define NETLINK_IP6_FW 13
22#define NETLINK_DNRTMSG 14 /* DECnet routing messages */
23#define NETLINK_KOBJECT_UEVENT 15 /* Kernel messages to userspace */
24#define NETLINK_GENERIC 16
25/* leave room for NETLINK_DM (DM Events) */
26#define NETLINK_SCSITRANSPORT 18 /* SCSI Transports */
27#define NETLINK_ECRYPTFS 19
28#define NETLINK_RDMA 20
29#define NETLINK_CRYPTO 21 /* Crypto layer */
30#define NETLINK_SMC 22 /* SMC monitoring */
31
32#define NETLINK_INET_DIAG NETLINK_SOCK_DIAG
33
34#define MAX_LINKS 32
35
36struct sockaddr_nl {
37 __kernel_sa_family_t nl_family; /* AF_NETLINK */
38 unsigned short nl_pad; /* zero */
39 __u32 nl_pid; /* port ID */
40 __u32 nl_groups; /* multicast groups mask */
41};
42
43struct nlmsghdr {
44 __u32 nlmsg_len; /* Length of message including header */
45 __u16 nlmsg_type; /* Message content */
46 __u16 nlmsg_flags; /* Additional flags */
47 __u32 nlmsg_seq; /* Sequence number */
48 __u32 nlmsg_pid; /* Sending process port ID */
49};
50
51/* Flags values */
52
53#define NLM_F_REQUEST 1 /* It is request message. */
54#define NLM_F_MULTI 2 /* Multipart message, terminated by NLMSG_DONE */
55#define NLM_F_ACK 4 /* Reply with ack, with zero or error code */
56#define NLM_F_ECHO 8 /* Echo this request */
57#define NLM_F_DUMP_INTR 16 /* Dump was inconsistent due to sequence change */
58#define NLM_F_DUMP_FILTERED 32 /* Dump was filtered as requested */
59
60/* Modifiers to GET request */
61#define NLM_F_ROOT 0x100 /* specify tree root */
62#define NLM_F_MATCH 0x200 /* return all matching */
63#define NLM_F_ATOMIC 0x400 /* atomic GET */
64#define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH)
65
66/* Modifiers to NEW request */
67#define NLM_F_REPLACE 0x100 /* Override existing */
68#define NLM_F_EXCL 0x200 /* Do not touch, if it exists */
69#define NLM_F_CREATE 0x400 /* Create, if it does not exist */
70#define NLM_F_APPEND 0x800 /* Add to end of list */
71
72/*
73 4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL
74 4.4BSD CHANGE NLM_F_REPLACE
75
76 True CHANGE NLM_F_CREATE|NLM_F_REPLACE
77 Append NLM_F_CREATE
78 Check NLM_F_EXCL
79 */
80
81#define NLMSG_ALIGNTO 4U
82#define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) )
83#define NLMSG_HDRLEN ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr)))
84#define NLMSG_LENGTH(len) ((len) + NLMSG_HDRLEN)
85#define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len))
86#define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0)))
87#define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \
88 (struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len)))
89#define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \
90 (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \
91 (nlh)->nlmsg_len <= (len))
92#define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len)))
93
94#define NLMSG_NOOP 0x1 /* Nothing. */
95#define NLMSG_ERROR 0x2 /* Error */
96#define NLMSG_DONE 0x3 /* End of a dump */
97#define NLMSG_OVERRUN 0x4 /* Data lost */
98
99#define NLMSG_MIN_TYPE 0x10 /* < 0x10: reserved control messages */
100
101struct nlmsgerr {
102 int error;
103 struct nlmsghdr msg;
104};
105
106#define NETLINK_ADD_MEMBERSHIP 1
107#define NETLINK_DROP_MEMBERSHIP 2
108#define NETLINK_PKTINFO 3
109#define NETLINK_BROADCAST_ERROR 4
110#define NETLINK_NO_ENOBUFS 5
111#ifndef __KERNEL__
112#define NETLINK_RX_RING 6
113#define NETLINK_TX_RING 7
114#endif
115#define NETLINK_LISTEN_ALL_NSID 8
116#define NETLINK_LIST_MEMBERSHIPS 9
117#define NETLINK_CAP_ACK 10
118
119struct nl_pktinfo {
120 __u32 group;
121};
122
123struct nl_mmap_req {
124 unsigned int nm_block_size;
125 unsigned int nm_block_nr;
126 unsigned int nm_frame_size;
127 unsigned int nm_frame_nr;
128};
129
130struct nl_mmap_hdr {
131 unsigned int nm_status;
132 unsigned int nm_len;
133 __u32 nm_group;
134 /* credentials */
135 __u32 nm_pid;
136 __u32 nm_uid;
137 __u32 nm_gid;
138};
139
140#ifndef __KERNEL__
141enum nl_mmap_status {
142 NL_MMAP_STATUS_UNUSED,
143 NL_MMAP_STATUS_RESERVED,
144 NL_MMAP_STATUS_VALID,
145 NL_MMAP_STATUS_COPY,
146 NL_MMAP_STATUS_SKIP,
147};
148
149#define NL_MMAP_MSG_ALIGNMENT NLMSG_ALIGNTO
150#define NL_MMAP_MSG_ALIGN(sz) __ALIGN_KERNEL(sz, NL_MMAP_MSG_ALIGNMENT)
151#define NL_MMAP_HDRLEN NL_MMAP_MSG_ALIGN(sizeof(struct nl_mmap_hdr))
152#endif
153
154#define NET_MAJOR 36 /* Major 36 is reserved for networking */
155
156enum {
157 NETLINK_UNCONNECTED = 0,
158 NETLINK_CONNECTED,
159};
160
161/*
162 * <------- NLA_HDRLEN ------> <-- NLA_ALIGN(payload)-->
163 * +---------------------+- - -+- - - - - - - - - -+- - -+
164 * | Header | Pad | Payload | Pad |
165 * | (struct nlattr) | ing | | ing |
166 * +---------------------+- - -+- - - - - - - - - -+- - -+
167 * <-------------- nlattr->nla_len -------------->
168 */
169
170struct nlattr {
171 __u16 nla_len;
172 __u16 nla_type;
173};
174
175/*
176 * nla_type (16 bits)
177 * +---+---+-------------------------------+
178 * | N | O | Attribute Type |
179 * +---+---+-------------------------------+
180 * N := Carries nested attributes
181 * O := Payload stored in network byte order
182 *
183 * Note: The N and O flag are mutually exclusive.
184 */
185#define NLA_F_NESTED (1 << 15)
186#define NLA_F_NET_BYTEORDER (1 << 14)
187#define NLA_TYPE_MASK ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER)
188
189#define NLA_ALIGNTO 4
190#define NLA_ALIGN(len) (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1))
191#define NLA_HDRLEN ((int) NLA_ALIGN(sizeof(struct nlattr)))
192
193
194#endif /* _UAPI__LINUX_NETLINK_H */