1 #ifndef _LINUX_XFRM_H
2 #define _LINUX_XFRM_H
3
4 #include <linux/types.h>
5
6 /* All of the structures in this file may not change size as they are
7 * passed into the kernel from userspace via netlink sockets.
8 */
9
10 /* Structure to encapsulate addresses. I do not want to use
11 * "standard" structure. My apologies.
12 */
13 typedef union
14 {
15 __u32 a4;
16 __u32 a6[4];
17 } xfrm_address_t;
18
19 /* Ident of a specific xfrm_state. It is used on input to lookup
20 * the state by (spi,daddr,ah/esp) or to store information about
21 * spi, protocol and tunnel address on output.
22 */
23 struct xfrm_id
24 {
25 xfrm_address_t daddr;
26 __u32 spi;
27 __u8 proto;
28 };
29
30 /* Selector, used as selector both on policy rules (SPD) and SAs. */
31
32 struct xfrm_selector
33 {
34 xfrm_address_t daddr;
35 xfrm_address_t saddr;
36 __u16 dport;
37 __u16 dport_mask;
38 __u16 sport;
39 __u16 sport_mask;
40 __u16 family;
41 __u8 prefixlen_d;
42 __u8 prefixlen_s;
43 __u8 proto;
44 int ifindex;
45 uid_t user;
46 };
47
48 #define XFRM_INF (~(__u64)0)
49
50 struct xfrm_lifetime_cfg
51 {
52 __u64 soft_byte_limit;
53 __u64 hard_byte_limit;
54 __u64 soft_packet_limit;
55 __u64 hard_packet_limit;
56 __u64 soft_add_expires_seconds;
57 __u64 hard_add_expires_seconds;
58 __u64 soft_use_expires_seconds;
59 __u64 hard_use_expires_seconds;
60 };
61
62 struct xfrm_lifetime_cur
63 {
64 __u64 bytes;
65 __u64 packets;
66 __u64 add_time;
67 __u64 use_time;
68 };
69
70 struct xfrm_replay_state
71 {
72 __u32 oseq;
73 __u32 seq;
74 __u32 bitmap;
75 };
76
77 struct xfrm_algo {
78 char alg_name[64];
79 int alg_key_len; /* in bits */
80 char alg_key[0];
81 };
82
83 struct xfrm_stats {
84 __u32 replay_window;
85 __u32 replay;
86 __u32 integrity_failed;
87 };
88
89 enum
90 {
91 XFRM_POLICY_IN = 0,
92 XFRM_POLICY_OUT = 1,
93 XFRM_POLICY_FWD = 2,
94 XFRM_POLICY_MAX = 3
95 };
96
97 enum
98 {
99 XFRM_SHARE_ANY, /* No limitations */
100 XFRM_SHARE_SESSION, /* For this session only */
101 XFRM_SHARE_USER, /* For this user only */
102 XFRM_SHARE_UNIQUE /* Use once */
103 };
104
105 /* Netlink configuration messages. */
106 enum {
107 XFRM_MSG_BASE = 0x10,
108
109 XFRM_MSG_NEWSA = 0x10,
110 #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA
111 XFRM_MSG_DELSA,
112 #define XFRM_MSG_DELSA XFRM_MSG_DELSA
113 XFRM_MSG_GETSA,
114 #define XFRM_MSG_GETSA XFRM_MSG_GETSA
115
116 XFRM_MSG_NEWPOLICY,
117 #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY
118 XFRM_MSG_DELPOLICY,
119 #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY
120 XFRM_MSG_GETPOLICY,
121 #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY
122
123 XFRM_MSG_ALLOCSPI,
124 #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI
125 XFRM_MSG_ACQUIRE,
126 #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE
127 XFRM_MSG_EXPIRE,
128 #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE
129
130 XFRM_MSG_UPDPOLICY,
131 #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY
132 XFRM_MSG_UPDSA,
133 #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA
134
135 XFRM_MSG_POLEXPIRE,
136 #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE
137
138 XFRM_MSG_FLUSHSA,
139 #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA
140 XFRM_MSG_FLUSHPOLICY,
141 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
142
143 XFRM_MSG_MAX
144 };
145
146 struct xfrm_user_tmpl {
147 struct xfrm_id id;
148 __u16 family;
149 xfrm_address_t saddr;
150 __u32 reqid;
151 __u8 mode;
152 __u8 share;
153 __u8 optional;
154 __u32 aalgos;
155 __u32 ealgos;
156 __u32 calgos;
157 };
158
159 struct xfrm_encap_tmpl {
160 __u16 encap_type;
161 __u16 encap_sport;
162 __u16 encap_dport;
163 xfrm_address_t encap_oa;
164 };
165
166 /* Netlink message attributes. */
167 enum xfrm_attr_type_t {
168 XFRMA_UNSPEC,
169 XFRMA_ALG_AUTH, /* struct xfrm_algo */
170 XFRMA_ALG_CRYPT, /* struct xfrm_algo */
171 XFRMA_ALG_COMP, /* struct xfrm_algo */
172 XFRMA_ENCAP, /* struct xfrm_algo + struct xfrm_encap_tmpl */
173 XFRMA_TMPL, /* 1 or more struct xfrm_user_tmpl */
174 __XFRMA_MAX
175
176 #define XFRMA_MAX (__XFRMA_MAX - 1)
177 };
178
179 struct xfrm_usersa_info {
180 struct xfrm_selector sel;
181 struct xfrm_id id;
182 xfrm_address_t saddr;
183 struct xfrm_lifetime_cfg lft;
184 struct xfrm_lifetime_cur curlft;
185 struct xfrm_stats stats;
186 __u32 seq;
187 __u32 reqid;
188 __u16 family;
189 __u8 mode; /* 0=transport,1=tunnel */
190 __u8 replay_window;
191 __u8 flags;
192 #define XFRM_STATE_NOECN 1
193 #define XFRM_STATE_DECAP_DSCP 2
194 };
195
196 struct xfrm_usersa_id {
197 xfrm_address_t daddr;
198 __u32 spi;
199 __u16 family;
200 __u8 proto;
201 };
202
203 struct xfrm_userspi_info {
204 struct xfrm_usersa_info info;
205 __u32 min;
206 __u32 max;
207 };
208
209 struct xfrm_userpolicy_info {
210 struct xfrm_selector sel;
211 struct xfrm_lifetime_cfg lft;
212 struct xfrm_lifetime_cur curlft;
213 __u32 priority;
214 __u32 index;
215 __u8 dir;
216 __u8 action;
217 #define XFRM_POLICY_ALLOW 0
218 #define XFRM_POLICY_BLOCK 1
219 __u8 flags;
220 #define XFRM_POLICY_LOCALOK 1 /* Allow user to override global policy */
221 __u8 share;
222 };
223
224 struct xfrm_userpolicy_id {
225 struct xfrm_selector sel;
226 __u32 index;
227 __u8 dir;
228 };
229
230 struct xfrm_user_acquire {
231 struct xfrm_id id;
232 xfrm_address_t saddr;
233 struct xfrm_selector sel;
234 struct xfrm_userpolicy_info policy;
235 __u32 aalgos;
236 __u32 ealgos;
237 __u32 calgos;
238 __u32 seq;
239 };
240
241 struct xfrm_user_expire {
242 struct xfrm_usersa_info state;
243 __u8 hard;
244 };
245
246 struct xfrm_user_polexpire {
247 struct xfrm_userpolicy_info pol;
248 __u8 hard;
249 };
250
251 struct xfrm_usersa_flush {
252 __u8 proto;
253 };
254
255 #define XFRMGRP_ACQUIRE 1
256 #define XFRMGRP_EXPIRE 2
257
258 #endif /* _LINUX_XFRM_H */
259
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