move library packages to package/libs/
[openwrt/svn-archive/archive.git] / package / libs / libnl-tiny / src / include / netlink / netlink-kernel.h
1 #ifndef __LINUX_NETLINK_H
2 #define __LINUX_NETLINK_H
3
4 /**
5 * Netlink socket address
6 * @ingroup nl
7 */
8 struct sockaddr_nl
9 {
10 /** socket family (AF_NETLINK) */
11 sa_family_t nl_family;
12
13 /** Padding (unused) */
14 unsigned short nl_pad;
15
16 /** Unique process ID */
17 uint32_t nl_pid;
18
19 /** Multicast group subscriptions */
20 uint32_t nl_groups;
21 };
22
23 /**
24 * Netlink message header
25 * @ingroup msg
26 */
27 struct nlmsghdr
28 {
29 /**
30 * Length of message including header.
31 */
32 uint32_t nlmsg_len;
33
34 /**
35 * Message type (content type)
36 */
37 uint16_t nlmsg_type;
38
39 /**
40 * Message flags
41 */
42 uint16_t nlmsg_flags;
43
44 /**
45 * Sequence number
46 */
47 uint32_t nlmsg_seq;
48
49 /**
50 * Netlink PID of the proccess sending the message.
51 */
52 uint32_t nlmsg_pid;
53 };
54
55 /**
56 * @name Standard message flags
57 * @{
58 */
59
60 /**
61 * Must be set on all request messages (typically from user space to
62 * kernel space).
63 * @ingroup msg
64 */
65 #define NLM_F_REQUEST 1
66
67 /**
68 * Indicates the message is part of a multipart message terminated
69 * by NLMSG_DONE.
70 */
71 #define NLM_F_MULTI 2
72
73 /**
74 * Request for an acknowledgment on success.
75 */
76 #define NLM_F_ACK 4
77
78 /**
79 * Echo this request
80 */
81 #define NLM_F_ECHO 8
82
83 /** @} */
84
85 /**
86 * @name Additional message flags for GET requests
87 * @{
88 */
89
90 /**
91 * Return the complete table instead of a single entry.
92 * @ingroup msg
93 */
94 #define NLM_F_ROOT 0x100
95
96 /**
97 * Return all entries matching criteria passed in message content.
98 */
99 #define NLM_F_MATCH 0x200
100
101 /**
102 * Return an atomic snapshot of the table being referenced. This
103 * may require special privileges because it has the potential to
104 * interrupt service in the FE for a longer time.
105 */
106 #define NLM_F_ATOMIC 0x400
107
108 /**
109 * Dump all entries
110 */
111 #define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH)
112
113 /** @} */
114
115 /**
116 * @name Additional messsage flags for NEW requests
117 * @{
118 */
119
120 /**
121 * Replace existing matching config object with this request.
122 * @ingroup msg
123 */
124 #define NLM_F_REPLACE 0x100
125
126 /**
127 * Don't replace the config object if it already exists.
128 */
129 #define NLM_F_EXCL 0x200
130
131 /**
132 * Create config object if it doesn't already exist.
133 */
134 #define NLM_F_CREATE 0x400
135
136 /**
137 * Add to the end of the object list.
138 */
139 #define NLM_F_APPEND 0x800
140
141 /** @} */
142
143 /**
144 * @name Standard Message types
145 * @{
146 */
147
148 /**
149 * No operation, message must be ignored
150 * @ingroup msg
151 */
152 #define NLMSG_NOOP 0x1
153
154 /**
155 * The message signals an error and the payload contains a nlmsgerr
156 * structure. This can be looked at as a NACK and typically it is
157 * from FEC to CPC.
158 */
159 #define NLMSG_ERROR 0x2
160
161 /**
162 * Message terminates a multipart message.
163 */
164 #define NLMSG_DONE 0x3
165
166 /**
167 * The message signals that data got lost
168 */
169 #define NLMSG_OVERRUN 0x4
170
171 /**
172 * Lower limit of reserved message types
173 */
174 #define NLMSG_MIN_TYPE 0x10
175
176 /** @} */
177
178 /**
179 * Netlink error message
180 * @ingroup msg
181 */
182 struct nlmsgerr
183 {
184 /** Error code (errno number) */
185 int error;
186
187 /** Original netlink message causing the error */
188 struct nlmsghdr msg;
189 };
190
191 struct nl_pktinfo
192 {
193 __u32 group;
194 };
195
196 #endif /* __LINUX_NETLINK_H */