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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 */ | |
30 | ||
31 | #define NETLINK_INET_DIAG NETLINK_SOCK_DIAG | |
32 | ||
33 | #define MAX_LINKS 32 | |
34 | ||
35 | struct sockaddr_nl { | |
36 | __kernel_sa_family_t nl_family; /* AF_NETLINK */ | |
37 | unsigned short nl_pad; /* zero */ | |
38 | __u32 nl_pid; /* port ID */ | |
39 | __u32 nl_groups; /* multicast groups mask */ | |
40 | }; | |
41 | ||
42 | struct nlmsghdr { | |
43 | __u32 nlmsg_len; /* Length of message including header */ | |
44 | __u16 nlmsg_type; /* Message content */ | |
45 | __u16 nlmsg_flags; /* Additional flags */ | |
46 | __u32 nlmsg_seq; /* Sequence number */ | |
47 | __u32 nlmsg_pid; /* Sending process port ID */ | |
48 | }; | |
49 | ||
50 | /* Flags values */ | |
51 | ||
52 | #define NLM_F_REQUEST 1 /* It is request message. */ | |
53 | #define NLM_F_MULTI 2 /* Multipart message, terminated by NLMSG_DONE */ | |
54 | #define NLM_F_ACK 4 /* Reply with ack, with zero or error code */ | |
55 | #define NLM_F_ECHO 8 /* Echo this request */ | |
56 | #define NLM_F_DUMP_INTR 16 /* Dump was inconsistent due to sequence change */ | |
57 | ||
58 | /* Modifiers to GET request */ | |
59 | #define NLM_F_ROOT 0x100 /* specify tree root */ | |
60 | #define NLM_F_MATCH 0x200 /* return all matching */ | |
61 | #define NLM_F_ATOMIC 0x400 /* atomic GET */ | |
62 | #define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH) | |
63 | ||
64 | /* Modifiers to NEW request */ | |
65 | #define NLM_F_REPLACE 0x100 /* Override existing */ | |
66 | #define NLM_F_EXCL 0x200 /* Do not touch, if it exists */ | |
67 | #define NLM_F_CREATE 0x400 /* Create, if it does not exist */ | |
68 | #define NLM_F_APPEND 0x800 /* Add to end of list */ | |
69 | ||
70 | /* | |
71 | 4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL | |
72 | 4.4BSD CHANGE NLM_F_REPLACE | |
73 | ||
74 | True CHANGE NLM_F_CREATE|NLM_F_REPLACE | |
75 | Append NLM_F_CREATE | |
76 | Check NLM_F_EXCL | |
77 | */ | |
78 | ||
79 | #define NLMSG_ALIGNTO 4U | |
80 | #define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) ) | |
81 | #define NLMSG_HDRLEN ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr))) | |
a88b9ce5 | 82 | #define NLMSG_LENGTH(len) ((len) + NLMSG_HDRLEN) |
607ca46e DH |
83 | #define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len)) |
84 | #define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0))) | |
85 | #define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \ | |
86 | (struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len))) | |
87 | #define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \ | |
88 | (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \ | |
89 | (nlh)->nlmsg_len <= (len)) | |
90 | #define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len))) | |
91 | ||
92 | #define NLMSG_NOOP 0x1 /* Nothing. */ | |
93 | #define NLMSG_ERROR 0x2 /* Error */ | |
94 | #define NLMSG_DONE 0x3 /* End of a dump */ | |
95 | #define NLMSG_OVERRUN 0x4 /* Data lost */ | |
96 | ||
97 | #define NLMSG_MIN_TYPE 0x10 /* < 0x10: reserved control messages */ | |
98 | ||
99 | struct nlmsgerr { | |
100 | int error; | |
101 | struct nlmsghdr msg; | |
102 | }; | |
103 | ||
104 | #define NETLINK_ADD_MEMBERSHIP 1 | |
105 | #define NETLINK_DROP_MEMBERSHIP 2 | |
106 | #define NETLINK_PKTINFO 3 | |
107 | #define NETLINK_BROADCAST_ERROR 4 | |
108 | #define NETLINK_NO_ENOBUFS 5 | |
ccdfcc39 PM |
109 | #define NETLINK_RX_RING 6 |
110 | #define NETLINK_TX_RING 7 | |
607ca46e DH |
111 | |
112 | struct nl_pktinfo { | |
113 | __u32 group; | |
114 | }; | |
115 | ||
ccdfcc39 PM |
116 | struct nl_mmap_req { |
117 | unsigned int nm_block_size; | |
118 | unsigned int nm_block_nr; | |
119 | unsigned int nm_frame_size; | |
120 | unsigned int nm_frame_nr; | |
121 | }; | |
122 | ||
123 | struct nl_mmap_hdr { | |
124 | unsigned int nm_status; | |
125 | unsigned int nm_len; | |
126 | __u32 nm_group; | |
127 | /* credentials */ | |
128 | __u32 nm_pid; | |
129 | __u32 nm_uid; | |
130 | __u32 nm_gid; | |
131 | }; | |
132 | ||
133 | enum nl_mmap_status { | |
134 | NL_MMAP_STATUS_UNUSED, | |
135 | NL_MMAP_STATUS_RESERVED, | |
136 | NL_MMAP_STATUS_VALID, | |
137 | NL_MMAP_STATUS_COPY, | |
138 | NL_MMAP_STATUS_SKIP, | |
139 | }; | |
140 | ||
141 | #define NL_MMAP_MSG_ALIGNMENT NLMSG_ALIGNTO | |
142 | #define NL_MMAP_MSG_ALIGN(sz) __ALIGN_KERNEL(sz, NL_MMAP_MSG_ALIGNMENT) | |
143 | #define NL_MMAP_HDRLEN NL_MMAP_MSG_ALIGN(sizeof(struct nl_mmap_hdr)) | |
144 | ||
607ca46e DH |
145 | #define NET_MAJOR 36 /* Major 36 is reserved for networking */ |
146 | ||
147 | enum { | |
148 | NETLINK_UNCONNECTED = 0, | |
149 | NETLINK_CONNECTED, | |
150 | }; | |
151 | ||
152 | /* | |
153 | * <------- NLA_HDRLEN ------> <-- NLA_ALIGN(payload)--> | |
154 | * +---------------------+- - -+- - - - - - - - - -+- - -+ | |
155 | * | Header | Pad | Payload | Pad | | |
156 | * | (struct nlattr) | ing | | ing | | |
157 | * +---------------------+- - -+- - - - - - - - - -+- - -+ | |
158 | * <-------------- nlattr->nla_len --------------> | |
159 | */ | |
160 | ||
161 | struct nlattr { | |
162 | __u16 nla_len; | |
163 | __u16 nla_type; | |
164 | }; | |
165 | ||
166 | /* | |
167 | * nla_type (16 bits) | |
168 | * +---+---+-------------------------------+ | |
169 | * | N | O | Attribute Type | | |
170 | * +---+---+-------------------------------+ | |
171 | * N := Carries nested attributes | |
172 | * O := Payload stored in network byte order | |
173 | * | |
174 | * Note: The N and O flag are mutually exclusive. | |
175 | */ | |
176 | #define NLA_F_NESTED (1 << 15) | |
177 | #define NLA_F_NET_BYTEORDER (1 << 14) | |
178 | #define NLA_TYPE_MASK ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER) | |
179 | ||
180 | #define NLA_ALIGNTO 4 | |
181 | #define NLA_ALIGN(len) (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1)) | |
182 | #define NLA_HDRLEN ((int) NLA_ALIGN(sizeof(struct nlattr))) | |
183 | ||
184 | ||
185 | #endif /* _UAPI__LINUX_NETLINK_H */ |