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607ca46e DH |
1 | #ifndef _UAPI__LINUX_NETLINK_H |
2 | #define _UAPI__LINUX_NETLINK_H | |
3 | ||
ccdfcc39 | 4 | #include <linux/kernel.h> |
607ca46e DH |
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 */ | |
f16a7dd5 | 30 | #define NETLINK_SMC 22 /* SMC monitoring */ |
607ca46e DH |
31 | |
32 | #define NETLINK_INET_DIAG NETLINK_SOCK_DIAG | |
33 | ||
34 | #define MAX_LINKS 32 | |
35 | ||
36 | struct 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 | ||
43 | struct 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 | ||
261a0a54 JB |
53 | #define NLM_F_REQUEST 0x01 /* It is request message. */ |
54 | #define NLM_F_MULTI 0x02 /* Multipart message, terminated by NLMSG_DONE */ | |
55 | #define NLM_F_ACK 0x04 /* Reply with ack, with zero or error code */ | |
56 | #define NLM_F_ECHO 0x08 /* Echo this request */ | |
57 | #define NLM_F_DUMP_INTR 0x10 /* Dump was inconsistent due to sequence change */ | |
58 | #define NLM_F_DUMP_FILTERED 0x20 /* Dump was filtered as requested */ | |
607ca46e DH |
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 | ||
2d4bc933 JB |
72 | /* Flags for ACK message */ |
73 | #define NLM_F_CAPPED 0x100 /* request was capped */ | |
74 | #define NLM_F_ACK_TLVS 0x200 /* extended ACK TVLs were included */ | |
75 | ||
607ca46e DH |
76 | /* |
77 | 4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL | |
78 | 4.4BSD CHANGE NLM_F_REPLACE | |
79 | ||
80 | True CHANGE NLM_F_CREATE|NLM_F_REPLACE | |
81 | Append NLM_F_CREATE | |
82 | Check NLM_F_EXCL | |
83 | */ | |
84 | ||
85 | #define NLMSG_ALIGNTO 4U | |
86 | #define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) ) | |
87 | #define NLMSG_HDRLEN ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr))) | |
a88b9ce5 | 88 | #define NLMSG_LENGTH(len) ((len) + NLMSG_HDRLEN) |
607ca46e DH |
89 | #define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len)) |
90 | #define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0))) | |
91 | #define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \ | |
92 | (struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len))) | |
93 | #define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \ | |
94 | (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \ | |
95 | (nlh)->nlmsg_len <= (len)) | |
96 | #define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len))) | |
97 | ||
98 | #define NLMSG_NOOP 0x1 /* Nothing. */ | |
99 | #define NLMSG_ERROR 0x2 /* Error */ | |
100 | #define NLMSG_DONE 0x3 /* End of a dump */ | |
101 | #define NLMSG_OVERRUN 0x4 /* Data lost */ | |
102 | ||
103 | #define NLMSG_MIN_TYPE 0x10 /* < 0x10: reserved control messages */ | |
104 | ||
105 | struct nlmsgerr { | |
106 | int error; | |
107 | struct nlmsghdr msg; | |
2d4bc933 JB |
108 | /* |
109 | * followed by the message contents unless NETLINK_CAP_ACK was set | |
110 | * or the ACK indicates success (error == 0) | |
111 | * message length is aligned with NLMSG_ALIGN() | |
112 | */ | |
113 | /* | |
114 | * followed by TLVs defined in enum nlmsgerr_attrs | |
115 | * if NETLINK_EXT_ACK was set | |
116 | */ | |
117 | }; | |
118 | ||
119 | /** | |
120 | * enum nlmsgerr_attrs - nlmsgerr attributes | |
121 | * @NLMSGERR_ATTR_UNUSED: unused | |
122 | * @NLMSGERR_ATTR_MSG: error message string (string) | |
123 | * @NLMSGERR_ATTR_OFFS: offset of the invalid attribute in the original | |
124 | * message, counting from the beginning of the header (u32) | |
ba0dc5f6 JB |
125 | * @NLMSGERR_ATTR_COOKIE: arbitrary subsystem specific cookie to |
126 | * be used - in the success case - to identify a created | |
127 | * object or operation or similar (binary) | |
2d4bc933 JB |
128 | * @__NLMSGERR_ATTR_MAX: number of attributes |
129 | * @NLMSGERR_ATTR_MAX: highest attribute number | |
130 | */ | |
131 | enum nlmsgerr_attrs { | |
132 | NLMSGERR_ATTR_UNUSED, | |
133 | NLMSGERR_ATTR_MSG, | |
134 | NLMSGERR_ATTR_OFFS, | |
ba0dc5f6 | 135 | NLMSGERR_ATTR_COOKIE, |
2d4bc933 JB |
136 | |
137 | __NLMSGERR_ATTR_MAX, | |
138 | NLMSGERR_ATTR_MAX = __NLMSGERR_ATTR_MAX - 1 | |
607ca46e DH |
139 | }; |
140 | ||
b42be38b DH |
141 | #define NETLINK_ADD_MEMBERSHIP 1 |
142 | #define NETLINK_DROP_MEMBERSHIP 2 | |
143 | #define NETLINK_PKTINFO 3 | |
144 | #define NETLINK_BROADCAST_ERROR 4 | |
145 | #define NETLINK_NO_ENOBUFS 5 | |
d1b4c689 | 146 | #ifndef __KERNEL__ |
b42be38b DH |
147 | #define NETLINK_RX_RING 6 |
148 | #define NETLINK_TX_RING 7 | |
d1b4c689 | 149 | #endif |
b42be38b DH |
150 | #define NETLINK_LISTEN_ALL_NSID 8 |
151 | #define NETLINK_LIST_MEMBERSHIPS 9 | |
0a6a3a23 | 152 | #define NETLINK_CAP_ACK 10 |
2d4bc933 | 153 | #define NETLINK_EXT_ACK 11 |
607ca46e DH |
154 | |
155 | struct nl_pktinfo { | |
156 | __u32 group; | |
157 | }; | |
158 | ||
ccdfcc39 PM |
159 | struct nl_mmap_req { |
160 | unsigned int nm_block_size; | |
161 | unsigned int nm_block_nr; | |
162 | unsigned int nm_frame_size; | |
163 | unsigned int nm_frame_nr; | |
164 | }; | |
165 | ||
166 | struct nl_mmap_hdr { | |
167 | unsigned int nm_status; | |
168 | unsigned int nm_len; | |
169 | __u32 nm_group; | |
170 | /* credentials */ | |
171 | __u32 nm_pid; | |
172 | __u32 nm_uid; | |
173 | __u32 nm_gid; | |
174 | }; | |
175 | ||
d1b4c689 | 176 | #ifndef __KERNEL__ |
ccdfcc39 PM |
177 | enum nl_mmap_status { |
178 | NL_MMAP_STATUS_UNUSED, | |
179 | NL_MMAP_STATUS_RESERVED, | |
180 | NL_MMAP_STATUS_VALID, | |
181 | NL_MMAP_STATUS_COPY, | |
182 | NL_MMAP_STATUS_SKIP, | |
183 | }; | |
184 | ||
185 | #define NL_MMAP_MSG_ALIGNMENT NLMSG_ALIGNTO | |
186 | #define NL_MMAP_MSG_ALIGN(sz) __ALIGN_KERNEL(sz, NL_MMAP_MSG_ALIGNMENT) | |
187 | #define NL_MMAP_HDRLEN NL_MMAP_MSG_ALIGN(sizeof(struct nl_mmap_hdr)) | |
d1b4c689 | 188 | #endif |
ccdfcc39 | 189 | |
607ca46e DH |
190 | #define NET_MAJOR 36 /* Major 36 is reserved for networking */ |
191 | ||
192 | enum { | |
193 | NETLINK_UNCONNECTED = 0, | |
194 | NETLINK_CONNECTED, | |
195 | }; | |
196 | ||
197 | /* | |
198 | * <------- NLA_HDRLEN ------> <-- NLA_ALIGN(payload)--> | |
199 | * +---------------------+- - -+- - - - - - - - - -+- - -+ | |
200 | * | Header | Pad | Payload | Pad | | |
201 | * | (struct nlattr) | ing | | ing | | |
202 | * +---------------------+- - -+- - - - - - - - - -+- - -+ | |
203 | * <-------------- nlattr->nla_len --------------> | |
204 | */ | |
205 | ||
206 | struct nlattr { | |
207 | __u16 nla_len; | |
208 | __u16 nla_type; | |
209 | }; | |
210 | ||
211 | /* | |
212 | * nla_type (16 bits) | |
213 | * +---+---+-------------------------------+ | |
214 | * | N | O | Attribute Type | | |
215 | * +---+---+-------------------------------+ | |
216 | * N := Carries nested attributes | |
217 | * O := Payload stored in network byte order | |
218 | * | |
219 | * Note: The N and O flag are mutually exclusive. | |
220 | */ | |
221 | #define NLA_F_NESTED (1 << 15) | |
222 | #define NLA_F_NET_BYTEORDER (1 << 14) | |
223 | #define NLA_TYPE_MASK ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER) | |
224 | ||
225 | #define NLA_ALIGNTO 4 | |
226 | #define NLA_ALIGN(len) (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1)) | |
227 | #define NLA_HDRLEN ((int) NLA_ALIGN(sizeof(struct nlattr))) | |
228 | ||
229 | ||
230 | #endif /* _UAPI__LINUX_NETLINK_H */ |