firmware-utils: move bcm_tag.h here
[openwrt/svn-archive/archive.git] / package / libnl-tiny / src / include / linux / netlink.h
1 #ifndef __LINUX_NETLINK_H
2 #define __LINUX_NETLINK_H
3
4 #include <linux/socket.h> /* for sa_family_t */
5 #include <linux/types.h>
6
7 #define NETLINK_ROUTE 0 /* Routing/device hook */
8 #define NETLINK_UNUSED 1 /* Unused number */
9 #define NETLINK_USERSOCK 2 /* Reserved for user mode socket protocols */
10 #define NETLINK_FIREWALL 3 /* Firewalling hook */
11 #define NETLINK_INET_DIAG 4 /* INET socket monitoring */
12 #define NETLINK_NFLOG 5 /* netfilter/iptables ULOG */
13 #define NETLINK_XFRM 6 /* ipsec */
14 #define NETLINK_SELINUX 7 /* SELinux event notifications */
15 #define NETLINK_ISCSI 8 /* Open-iSCSI */
16 #define NETLINK_AUDIT 9 /* auditing */
17 #define NETLINK_FIB_LOOKUP 10
18 #define NETLINK_CONNECTOR 11
19 #define NETLINK_NETFILTER 12 /* netfilter subsystem */
20 #define NETLINK_IP6_FW 13
21 #define NETLINK_DNRTMSG 14 /* DECnet routing messages */
22 #define NETLINK_KOBJECT_UEVENT 15 /* Kernel messages to userspace */
23 #define NETLINK_GENERIC 16
24 /* leave room for NETLINK_DM (DM Events) */
25 #define NETLINK_SCSITRANSPORT 18 /* SCSI Transports */
26 #define NETLINK_ECRYPTFS 19
27
28 #define MAX_LINKS 32
29
30 struct sockaddr_nl
31 {
32 sa_family_t nl_family; /* AF_NETLINK */
33 unsigned short nl_pad; /* zero */
34 __u32 nl_pid; /* port ID */
35 __u32 nl_groups; /* multicast groups mask */
36 };
37
38 struct nlmsghdr
39 {
40 __u32 nlmsg_len; /* Length of message including header */
41 __u16 nlmsg_type; /* Message content */
42 __u16 nlmsg_flags; /* Additional flags */
43 __u32 nlmsg_seq; /* Sequence number */
44 __u32 nlmsg_pid; /* Sending process port ID */
45 };
46
47 /* Flags values */
48
49 #define NLM_F_REQUEST 1 /* It is request message. */
50 #define NLM_F_MULTI 2 /* Multipart message, terminated by NLMSG_DONE */
51 #define NLM_F_ACK 4 /* Reply with ack, with zero or error code */
52 #define NLM_F_ECHO 8 /* Echo this request */
53
54 /* Modifiers to GET request */
55 #define NLM_F_ROOT 0x100 /* specify tree root */
56 #define NLM_F_MATCH 0x200 /* return all matching */
57 #define NLM_F_ATOMIC 0x400 /* atomic GET */
58 #define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH)
59
60 /* Modifiers to NEW request */
61 #define NLM_F_REPLACE 0x100 /* Override existing */
62 #define NLM_F_EXCL 0x200 /* Do not touch, if it exists */
63 #define NLM_F_CREATE 0x400 /* Create, if it does not exist */
64 #define NLM_F_APPEND 0x800 /* Add to end of list */
65
66 /*
67 4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL
68 4.4BSD CHANGE NLM_F_REPLACE
69
70 True CHANGE NLM_F_CREATE|NLM_F_REPLACE
71 Append NLM_F_CREATE
72 Check NLM_F_EXCL
73 */
74
75 #define NLMSG_ALIGNTO 4
76 #define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) )
77 #define NLMSG_HDRLEN ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr)))
78 #define NLMSG_LENGTH(len) ((len)+NLMSG_ALIGN(NLMSG_HDRLEN))
79 #define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len))
80 #define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0)))
81 #define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \
82 (struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len)))
83 #define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \
84 (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \
85 (nlh)->nlmsg_len <= (len))
86 #define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len)))
87
88 #define NLMSG_NOOP 0x1 /* Nothing. */
89 #define NLMSG_ERROR 0x2 /* Error */
90 #define NLMSG_DONE 0x3 /* End of a dump */
91 #define NLMSG_OVERRUN 0x4 /* Data lost */
92
93 #define NLMSG_MIN_TYPE 0x10 /* < 0x10: reserved control messages */
94
95 struct nlmsgerr
96 {
97 int error;
98 struct nlmsghdr msg;
99 };
100
101 #define NETLINK_ADD_MEMBERSHIP 1
102 #define NETLINK_DROP_MEMBERSHIP 2
103 #define NETLINK_PKTINFO 3
104
105 struct nl_pktinfo
106 {
107 __u32 group;
108 };
109
110 #define NET_MAJOR 36 /* Major 36 is reserved for networking */
111
112 enum {
113 NETLINK_UNCONNECTED = 0,
114 NETLINK_CONNECTED,
115 };
116
117 /*
118 * <------- NLA_HDRLEN ------> <-- NLA_ALIGN(payload)-->
119 * +---------------------+- - -+- - - - - - - - - -+- - -+
120 * | Header | Pad | Payload | Pad |
121 * | (struct nlattr) | ing | | ing |
122 * +---------------------+- - -+- - - - - - - - - -+- - -+
123 * <-------------- nlattr->nla_len -------------->
124 */
125
126 struct nlattr
127 {
128 __u16 nla_len;
129 __u16 nla_type;
130 };
131
132 /*
133 * nla_type (16 bits)
134 * +---+---+-------------------------------+
135 * | N | O | Attribute Type |
136 * +---+---+-------------------------------+
137 * N := Carries nested attributes
138 * O := Payload stored in network byte order
139 *
140 * Note: The N and O flag are mutually exclusive.
141 */
142 #define NLA_F_NESTED (1 << 15)
143 #define NLA_F_NET_BYTEORDER (1 << 14)
144 #define NLA_TYPE_MASK ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER)
145
146 #define NLA_ALIGNTO 4
147 #define NLA_ALIGN(len) (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1))
148 #define NLA_HDRLEN ((int) NLA_ALIGN(sizeof(struct nlattr)))
149
150 #endif /* __LINUX_NETLINK_H */