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1da177e4 LT |
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 | ||
df71837d TJ |
30 | struct xfrm_sec_ctx { |
31 | __u8 ctx_doi; | |
32 | __u8 ctx_alg; | |
33 | __u16 ctx_len; | |
34 | __u32 ctx_sid; | |
35 | char ctx_str[0]; | |
36 | }; | |
37 | ||
38 | /* Security Context Domains of Interpretation */ | |
39 | #define XFRM_SC_DOI_RESERVED 0 | |
40 | #define XFRM_SC_DOI_LSM 1 | |
41 | ||
42 | /* Security Context Algorithms */ | |
43 | #define XFRM_SC_ALG_RESERVED 0 | |
44 | #define XFRM_SC_ALG_SELINUX 1 | |
45 | ||
1da177e4 LT |
46 | /* Selector, used as selector both on policy rules (SPD) and SAs. */ |
47 | ||
48 | struct xfrm_selector | |
49 | { | |
50 | xfrm_address_t daddr; | |
51 | xfrm_address_t saddr; | |
52 | __u16 dport; | |
53 | __u16 dport_mask; | |
54 | __u16 sport; | |
55 | __u16 sport_mask; | |
56 | __u16 family; | |
57 | __u8 prefixlen_d; | |
58 | __u8 prefixlen_s; | |
59 | __u8 proto; | |
60 | int ifindex; | |
61 | uid_t user; | |
62 | }; | |
63 | ||
64 | #define XFRM_INF (~(__u64)0) | |
65 | ||
66 | struct xfrm_lifetime_cfg | |
67 | { | |
68 | __u64 soft_byte_limit; | |
69 | __u64 hard_byte_limit; | |
70 | __u64 soft_packet_limit; | |
71 | __u64 hard_packet_limit; | |
72 | __u64 soft_add_expires_seconds; | |
73 | __u64 hard_add_expires_seconds; | |
74 | __u64 soft_use_expires_seconds; | |
75 | __u64 hard_use_expires_seconds; | |
76 | }; | |
77 | ||
78 | struct xfrm_lifetime_cur | |
79 | { | |
80 | __u64 bytes; | |
81 | __u64 packets; | |
82 | __u64 add_time; | |
83 | __u64 use_time; | |
84 | }; | |
85 | ||
86 | struct xfrm_replay_state | |
87 | { | |
88 | __u32 oseq; | |
89 | __u32 seq; | |
90 | __u32 bitmap; | |
91 | }; | |
92 | ||
93 | struct xfrm_algo { | |
94 | char alg_name[64]; | |
95 | int alg_key_len; /* in bits */ | |
96 | char alg_key[0]; | |
97 | }; | |
98 | ||
99 | struct xfrm_stats { | |
100 | __u32 replay_window; | |
101 | __u32 replay; | |
102 | __u32 integrity_failed; | |
103 | }; | |
104 | ||
105 | enum | |
106 | { | |
107 | XFRM_POLICY_IN = 0, | |
108 | XFRM_POLICY_OUT = 1, | |
109 | XFRM_POLICY_FWD = 2, | |
110 | XFRM_POLICY_MAX = 3 | |
111 | }; | |
112 | ||
113 | enum | |
114 | { | |
115 | XFRM_SHARE_ANY, /* No limitations */ | |
116 | XFRM_SHARE_SESSION, /* For this session only */ | |
117 | XFRM_SHARE_USER, /* For this user only */ | |
118 | XFRM_SHARE_UNIQUE /* Use once */ | |
119 | }; | |
120 | ||
121 | /* Netlink configuration messages. */ | |
122 | enum { | |
123 | XFRM_MSG_BASE = 0x10, | |
124 | ||
125 | XFRM_MSG_NEWSA = 0x10, | |
126 | #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA | |
127 | XFRM_MSG_DELSA, | |
128 | #define XFRM_MSG_DELSA XFRM_MSG_DELSA | |
129 | XFRM_MSG_GETSA, | |
130 | #define XFRM_MSG_GETSA XFRM_MSG_GETSA | |
131 | ||
132 | XFRM_MSG_NEWPOLICY, | |
133 | #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY | |
134 | XFRM_MSG_DELPOLICY, | |
135 | #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY | |
136 | XFRM_MSG_GETPOLICY, | |
137 | #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY | |
138 | ||
139 | XFRM_MSG_ALLOCSPI, | |
140 | #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI | |
141 | XFRM_MSG_ACQUIRE, | |
142 | #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE | |
143 | XFRM_MSG_EXPIRE, | |
144 | #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE | |
145 | ||
146 | XFRM_MSG_UPDPOLICY, | |
147 | #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY | |
148 | XFRM_MSG_UPDSA, | |
149 | #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA | |
150 | ||
151 | XFRM_MSG_POLEXPIRE, | |
152 | #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE | |
153 | ||
154 | XFRM_MSG_FLUSHSA, | |
155 | #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA | |
156 | XFRM_MSG_FLUSHPOLICY, | |
157 | #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY | |
158 | ||
526bdb80 | 159 | __XFRM_MSG_MAX |
1da177e4 | 160 | }; |
526bdb80 | 161 | #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1) |
1da177e4 | 162 | |
492b558b TG |
163 | #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE) |
164 | ||
df71837d TJ |
165 | /* |
166 | * Generic LSM security context for comunicating to user space | |
167 | * NOTE: Same format as sadb_x_sec_ctx | |
168 | */ | |
169 | struct xfrm_user_sec_ctx { | |
170 | __u16 len; | |
171 | __u16 exttype; | |
172 | __u8 ctx_alg; /* LSMs: e.g., selinux == 1 */ | |
173 | __u8 ctx_doi; | |
174 | __u16 ctx_len; | |
175 | }; | |
176 | ||
1da177e4 LT |
177 | struct xfrm_user_tmpl { |
178 | struct xfrm_id id; | |
179 | __u16 family; | |
180 | xfrm_address_t saddr; | |
181 | __u32 reqid; | |
182 | __u8 mode; | |
183 | __u8 share; | |
184 | __u8 optional; | |
185 | __u32 aalgos; | |
186 | __u32 ealgos; | |
187 | __u32 calgos; | |
188 | }; | |
189 | ||
190 | struct xfrm_encap_tmpl { | |
191 | __u16 encap_type; | |
192 | __u16 encap_sport; | |
193 | __u16 encap_dport; | |
194 | xfrm_address_t encap_oa; | |
195 | }; | |
196 | ||
197 | /* Netlink message attributes. */ | |
198 | enum xfrm_attr_type_t { | |
199 | XFRMA_UNSPEC, | |
200 | XFRMA_ALG_AUTH, /* struct xfrm_algo */ | |
201 | XFRMA_ALG_CRYPT, /* struct xfrm_algo */ | |
202 | XFRMA_ALG_COMP, /* struct xfrm_algo */ | |
203 | XFRMA_ENCAP, /* struct xfrm_algo + struct xfrm_encap_tmpl */ | |
204 | XFRMA_TMPL, /* 1 or more struct xfrm_user_tmpl */ | |
0603eac0 HX |
205 | XFRMA_SA, |
206 | XFRMA_POLICY, | |
df71837d | 207 | XFRMA_SEC_CTX, /* struct xfrm_sec_ctx */ |
1da177e4 LT |
208 | __XFRMA_MAX |
209 | ||
210 | #define XFRMA_MAX (__XFRMA_MAX - 1) | |
211 | }; | |
212 | ||
213 | struct xfrm_usersa_info { | |
214 | struct xfrm_selector sel; | |
215 | struct xfrm_id id; | |
216 | xfrm_address_t saddr; | |
217 | struct xfrm_lifetime_cfg lft; | |
218 | struct xfrm_lifetime_cur curlft; | |
219 | struct xfrm_stats stats; | |
220 | __u32 seq; | |
221 | __u32 reqid; | |
222 | __u16 family; | |
223 | __u8 mode; /* 0=transport,1=tunnel */ | |
224 | __u8 replay_window; | |
225 | __u8 flags; | |
226 | #define XFRM_STATE_NOECN 1 | |
227 | #define XFRM_STATE_DECAP_DSCP 2 | |
dd87147e | 228 | #define XFRM_STATE_NOPMTUDISC 4 |
1da177e4 LT |
229 | }; |
230 | ||
231 | struct xfrm_usersa_id { | |
232 | xfrm_address_t daddr; | |
233 | __u32 spi; | |
234 | __u16 family; | |
235 | __u8 proto; | |
236 | }; | |
237 | ||
238 | struct xfrm_userspi_info { | |
239 | struct xfrm_usersa_info info; | |
240 | __u32 min; | |
241 | __u32 max; | |
242 | }; | |
243 | ||
244 | struct xfrm_userpolicy_info { | |
245 | struct xfrm_selector sel; | |
246 | struct xfrm_lifetime_cfg lft; | |
247 | struct xfrm_lifetime_cur curlft; | |
248 | __u32 priority; | |
249 | __u32 index; | |
250 | __u8 dir; | |
251 | __u8 action; | |
252 | #define XFRM_POLICY_ALLOW 0 | |
253 | #define XFRM_POLICY_BLOCK 1 | |
254 | __u8 flags; | |
255 | #define XFRM_POLICY_LOCALOK 1 /* Allow user to override global policy */ | |
256 | __u8 share; | |
257 | }; | |
258 | ||
259 | struct xfrm_userpolicy_id { | |
260 | struct xfrm_selector sel; | |
261 | __u32 index; | |
262 | __u8 dir; | |
263 | }; | |
264 | ||
265 | struct xfrm_user_acquire { | |
266 | struct xfrm_id id; | |
267 | xfrm_address_t saddr; | |
268 | struct xfrm_selector sel; | |
269 | struct xfrm_userpolicy_info policy; | |
270 | __u32 aalgos; | |
271 | __u32 ealgos; | |
272 | __u32 calgos; | |
273 | __u32 seq; | |
274 | }; | |
275 | ||
276 | struct xfrm_user_expire { | |
277 | struct xfrm_usersa_info state; | |
278 | __u8 hard; | |
279 | }; | |
280 | ||
281 | struct xfrm_user_polexpire { | |
282 | struct xfrm_userpolicy_info pol; | |
283 | __u8 hard; | |
284 | }; | |
285 | ||
286 | struct xfrm_usersa_flush { | |
287 | __u8 proto; | |
288 | }; | |
289 | ||
ac6d439d PM |
290 | #ifndef __KERNEL__ |
291 | /* backwards compatibility for userspace */ | |
1da177e4 LT |
292 | #define XFRMGRP_ACQUIRE 1 |
293 | #define XFRMGRP_EXPIRE 2 | |
26b15dad JHS |
294 | #define XFRMGRP_SA 4 |
295 | #define XFRMGRP_POLICY 8 | |
ac6d439d PM |
296 | #endif |
297 | ||
298 | enum xfrm_nlgroups { | |
299 | XFRMNLGRP_NONE, | |
300 | #define XFRMNLGRP_NONE XFRMNLGRP_NONE | |
301 | XFRMNLGRP_ACQUIRE, | |
302 | #define XFRMNLGRP_ACQUIRE XFRMNLGRP_ACQUIRE | |
303 | XFRMNLGRP_EXPIRE, | |
304 | #define XFRMNLGRP_EXPIRE XFRMNLGRP_EXPIRE | |
305 | XFRMNLGRP_SA, | |
306 | #define XFRMNLGRP_SA XFRMNLGRP_SA | |
307 | XFRMNLGRP_POLICY, | |
308 | #define XFRMNLGRP_POLICY XFRMNLGRP_POLICY | |
309 | __XFRMNLGRP_MAX | |
310 | }; | |
311 | #define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1) | |
1da177e4 LT |
312 | |
313 | #endif /* _LINUX_XFRM_H */ |