ike-rekey: Add method to check if there was a rekey collision
[strongswan.git] / src / include / linux / netlink.h
1 #ifndef _UAPI__LINUX_NETLINK_H
2 #define _UAPI__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
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)))
82 #define NLMSG_LENGTH(len) ((len) + NLMSG_HDRLEN)
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
109 #define NETLINK_RX_RING 6
110 #define NETLINK_TX_RING 7
111 #define NETLINK_LISTEN_ALL_NSID 8
112 #define NETLINK_LIST_MEMBERSHIPS 9
113
114 struct nl_pktinfo {
115 __u32 group;
116 };
117
118 struct nl_mmap_req {
119 unsigned int nm_block_size;
120 unsigned int nm_block_nr;
121 unsigned int nm_frame_size;
122 unsigned int nm_frame_nr;
123 };
124
125 struct nl_mmap_hdr {
126 unsigned int nm_status;
127 unsigned int nm_len;
128 __u32 nm_group;
129 /* credentials */
130 __u32 nm_pid;
131 __u32 nm_uid;
132 __u32 nm_gid;
133 };
134
135 enum nl_mmap_status {
136 NL_MMAP_STATUS_UNUSED,
137 NL_MMAP_STATUS_RESERVED,
138 NL_MMAP_STATUS_VALID,
139 NL_MMAP_STATUS_COPY,
140 NL_MMAP_STATUS_SKIP,
141 };
142
143 #define NL_MMAP_MSG_ALIGNMENT NLMSG_ALIGNTO
144 #define NL_MMAP_MSG_ALIGN(sz) __ALIGN_KERNEL(sz, NL_MMAP_MSG_ALIGNMENT)
145 #define NL_MMAP_HDRLEN NL_MMAP_MSG_ALIGN(sizeof(struct nl_mmap_hdr))
146
147 #define NET_MAJOR 36 /* Major 36 is reserved for networking */
148
149 enum {
150 NETLINK_UNCONNECTED = 0,
151 NETLINK_CONNECTED,
152 };
153
154 /*
155 * <------- NLA_HDRLEN ------> <-- NLA_ALIGN(payload)-->
156 * +---------------------+- - -+- - - - - - - - - -+- - -+
157 * | Header | Pad | Payload | Pad |
158 * | (struct nlattr) | ing | | ing |
159 * +---------------------+- - -+- - - - - - - - - -+- - -+
160 * <-------------- nlattr->nla_len -------------->
161 */
162
163 struct nlattr {
164 __u16 nla_len;
165 __u16 nla_type;
166 };
167
168 /*
169 * nla_type (16 bits)
170 * +---+---+-------------------------------+
171 * | N | O | Attribute Type |
172 * +---+---+-------------------------------+
173 * N := Carries nested attributes
174 * O := Payload stored in network byte order
175 *
176 * Note: The N and O flag are mutually exclusive.
177 */
178 #define NLA_F_NESTED (1 << 15)
179 #define NLA_F_NET_BYTEORDER (1 << 14)
180 #define NLA_TYPE_MASK ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER)
181
182 #define NLA_ALIGNTO 4
183 #define NLA_ALIGN(len) (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1))
184 #define NLA_HDRLEN ((int) NLA_ALIGN(sizeof(struct nlattr)))
185
186
187 #endif /* _UAPI__LINUX_NETLINK_H */