1 | #ifndef __LINUX_NETLINK_H |
2 | #define __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 | |
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 | #define NLM_F_DUMP_FILTERED 32 /* Dump was filtered as requested */ |
58 | |
59 | /* Modifiers to GET request */ |
60 | #define NLM_F_ROOT 0x100 /* specify tree root */ |
61 | #define NLM_F_MATCH 0x200 /* return all matching */ |
62 | #define NLM_F_ATOMIC 0x400 /* atomic GET */ |
63 | #define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH) |
64 | |
65 | /* Modifiers to NEW request */ |
66 | #define NLM_F_REPLACE 0x100 /* Override existing */ |
67 | #define NLM_F_EXCL 0x200 /* Do not touch, if it exists */ |
68 | #define NLM_F_CREATE 0x400 /* Create, if it does not exist */ |
69 | #define NLM_F_APPEND 0x800 /* Add to end of list */ |
70 | |
71 | /* |
72 | 4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL |
73 | 4.4BSD CHANGE NLM_F_REPLACE |
74 | |
75 | True CHANGE NLM_F_CREATE|NLM_F_REPLACE |
76 | Append NLM_F_CREATE |
77 | Check NLM_F_EXCL |
78 | */ |
79 | |
80 | #define NLMSG_ALIGNTO 4U |
81 | #define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) ) |
82 | #define NLMSG_HDRLEN ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr))) |
83 | #define NLMSG_LENGTH(len) ((len) + NLMSG_HDRLEN) |
84 | #define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len)) |
85 | #define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0))) |
86 | #define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \ |
87 | (struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len))) |
88 | #define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \ |
89 | (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \ |
90 | (nlh)->nlmsg_len <= (len)) |
91 | #define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len))) |
92 | |
93 | #define NLMSG_NOOP 0x1 /* Nothing. */ |
94 | #define NLMSG_ERROR 0x2 /* Error */ |
95 | #define NLMSG_DONE 0x3 /* End of a dump */ |
96 | #define NLMSG_OVERRUN 0x4 /* Data lost */ |
97 | |
98 | #define NLMSG_MIN_TYPE 0x10 /* < 0x10: reserved control messages */ |
99 | |
100 | struct nlmsgerr { |
101 | int error; |
102 | struct nlmsghdr msg; |
103 | }; |
104 | |
105 | #define NETLINK_ADD_MEMBERSHIP 1 |
106 | #define NETLINK_DROP_MEMBERSHIP 2 |
107 | #define NETLINK_PKTINFO 3 |
108 | #define NETLINK_BROADCAST_ERROR 4 |
109 | #define NETLINK_NO_ENOBUFS 5 |
110 | #define NETLINK_RX_RING 6 |
111 | #define NETLINK_TX_RING 7 |
112 | #define NETLINK_LISTEN_ALL_NSID 8 |
113 | #define NETLINK_LIST_MEMBERSHIPS 9 |
114 | #define NETLINK_CAP_ACK 10 |
115 | |
116 | struct nl_pktinfo { |
117 | __u32 group; |
118 | }; |
119 | |
120 | struct nl_mmap_req { |
121 | unsigned int nm_block_size; |
122 | unsigned int nm_block_nr; |
123 | unsigned int nm_frame_size; |
124 | unsigned int nm_frame_nr; |
125 | }; |
126 | |
127 | struct nl_mmap_hdr { |
128 | unsigned int nm_status; |
129 | unsigned int nm_len; |
130 | __u32 nm_group; |
131 | /* credentials */ |
132 | __u32 nm_pid; |
133 | __u32 nm_uid; |
134 | __u32 nm_gid; |
135 | }; |
136 | |
137 | enum nl_mmap_status { |
138 | NL_MMAP_STATUS_UNUSED, |
139 | NL_MMAP_STATUS_RESERVED, |
140 | NL_MMAP_STATUS_VALID, |
141 | NL_MMAP_STATUS_COPY, |
142 | NL_MMAP_STATUS_SKIP, |
143 | }; |
144 | |
145 | #define NL_MMAP_MSG_ALIGNMENT NLMSG_ALIGNTO |
146 | #define NL_MMAP_MSG_ALIGN(sz) __ALIGN_KERNEL(sz, NL_MMAP_MSG_ALIGNMENT) |
147 | #define NL_MMAP_HDRLEN NL_MMAP_MSG_ALIGN(sizeof(struct nl_mmap_hdr)) |
148 | |
149 | #define NET_MAJOR 36 /* Major 36 is reserved for networking */ |
150 | |
151 | enum { |
152 | NETLINK_UNCONNECTED = 0, |
153 | NETLINK_CONNECTED, |
154 | }; |
155 | |
156 | /* |
157 | * <------- NLA_HDRLEN ------> <-- NLA_ALIGN(payload)--> |
158 | * +---------------------+- - -+- - - - - - - - - -+- - -+ |
159 | * | Header | Pad | Payload | Pad | |
160 | * | (struct nlattr) | ing | | ing | |
161 | * +---------------------+- - -+- - - - - - - - - -+- - -+ |
162 | * <-------------- nlattr->nla_len --------------> |
163 | */ |
164 | |
165 | struct nlattr { |
166 | __u16 nla_len; |
167 | __u16 nla_type; |
168 | }; |
169 | |
170 | /* |
171 | * nla_type (16 bits) |
172 | * +---+---+-------------------------------+ |
173 | * | N | O | Attribute Type | |
174 | * +---+---+-------------------------------+ |
175 | * N := Carries nested attributes |
176 | * O := Payload stored in network byte order |
177 | * |
178 | * Note: The N and O flag are mutually exclusive. |
179 | */ |
180 | #define NLA_F_NESTED (1 << 15) |
181 | #define NLA_F_NET_BYTEORDER (1 << 14) |
182 | #define NLA_TYPE_MASK ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER) |
183 | |
184 | #define NLA_ALIGNTO 4 |
185 | #define NLA_ALIGN(len) (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1)) |
186 | #define NLA_HDRLEN ((int) NLA_ALIGN(sizeof(struct nlattr))) |
187 | |
188 | |
189 | #endif /* __LINUX_NETLINK_H */ |
190 | |