Implemented Traffic Flow Confidentiality padding in kernel_interface
[strongswan.git] / src / include / linux / xfrm.h
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 __be32 a4;
15 __be32 a6[4];
16 } xfrm_address_t;
17
18 /* Ident of a specific xfrm_state. It is used on input to lookup
19 * the state by (spi,daddr,ah/esp) or to store information about
20 * spi, protocol and tunnel address on output.
21 */
22 struct xfrm_id {
23 xfrm_address_t daddr;
24 __be32 spi;
25 __u8 proto;
26 };
27
28 struct xfrm_sec_ctx {
29 __u8 ctx_doi;
30 __u8 ctx_alg;
31 __u16 ctx_len;
32 __u32 ctx_sid;
33 char ctx_str[0];
34 };
35
36 /* Security Context Domains of Interpretation */
37 #define XFRM_SC_DOI_RESERVED 0
38 #define XFRM_SC_DOI_LSM 1
39
40 /* Security Context Algorithms */
41 #define XFRM_SC_ALG_RESERVED 0
42 #define XFRM_SC_ALG_SELINUX 1
43
44 /* Selector, used as selector both on policy rules (SPD) and SAs. */
45
46 struct xfrm_selector {
47 xfrm_address_t daddr;
48 xfrm_address_t saddr;
49 __be16 dport;
50 __be16 dport_mask;
51 __be16 sport;
52 __be16 sport_mask;
53 __u16 family;
54 __u8 prefixlen_d;
55 __u8 prefixlen_s;
56 __u8 proto;
57 int ifindex;
58 __kernel_uid32_t user;
59 };
60
61 #define XFRM_INF (~(__u64)0)
62
63 struct xfrm_lifetime_cfg {
64 __u64 soft_byte_limit;
65 __u64 hard_byte_limit;
66 __u64 soft_packet_limit;
67 __u64 hard_packet_limit;
68 __u64 soft_add_expires_seconds;
69 __u64 hard_add_expires_seconds;
70 __u64 soft_use_expires_seconds;
71 __u64 hard_use_expires_seconds;
72 };
73
74 struct xfrm_lifetime_cur {
75 __u64 bytes;
76 __u64 packets;
77 __u64 add_time;
78 __u64 use_time;
79 };
80
81 struct xfrm_replay_state {
82 __u32 oseq;
83 __u32 seq;
84 __u32 bitmap;
85 };
86
87 struct xfrm_algo {
88 char alg_name[64];
89 unsigned int alg_key_len; /* in bits */
90 char alg_key[0];
91 };
92
93 struct xfrm_algo_auth {
94 char alg_name[64];
95 unsigned int alg_key_len; /* in bits */
96 unsigned int alg_trunc_len; /* in bits */
97 char alg_key[0];
98 };
99
100 struct xfrm_algo_aead {
101 char alg_name[64];
102 unsigned int alg_key_len; /* in bits */
103 unsigned int alg_icv_len; /* in bits */
104 char alg_key[0];
105 };
106
107 struct xfrm_stats {
108 __u32 replay_window;
109 __u32 replay;
110 __u32 integrity_failed;
111 };
112
113 enum {
114 XFRM_POLICY_TYPE_MAIN = 0,
115 XFRM_POLICY_TYPE_SUB = 1,
116 XFRM_POLICY_TYPE_MAX = 2,
117 XFRM_POLICY_TYPE_ANY = 255
118 };
119
120 enum {
121 XFRM_POLICY_IN = 0,
122 XFRM_POLICY_OUT = 1,
123 XFRM_POLICY_FWD = 2,
124 XFRM_POLICY_MASK = 3,
125 XFRM_POLICY_MAX = 3
126 };
127
128 enum {
129 XFRM_SHARE_ANY, /* No limitations */
130 XFRM_SHARE_SESSION, /* For this session only */
131 XFRM_SHARE_USER, /* For this user only */
132 XFRM_SHARE_UNIQUE /* Use once */
133 };
134
135 #define XFRM_MODE_TRANSPORT 0
136 #define XFRM_MODE_TUNNEL 1
137 #define XFRM_MODE_ROUTEOPTIMIZATION 2
138 #define XFRM_MODE_IN_TRIGGER 3
139 #define XFRM_MODE_BEET 4
140 #define XFRM_MODE_MAX 5
141
142 /* Netlink configuration messages. */
143 enum {
144 XFRM_MSG_BASE = 0x10,
145
146 XFRM_MSG_NEWSA = 0x10,
147 #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA
148 XFRM_MSG_DELSA,
149 #define XFRM_MSG_DELSA XFRM_MSG_DELSA
150 XFRM_MSG_GETSA,
151 #define XFRM_MSG_GETSA XFRM_MSG_GETSA
152
153 XFRM_MSG_NEWPOLICY,
154 #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY
155 XFRM_MSG_DELPOLICY,
156 #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY
157 XFRM_MSG_GETPOLICY,
158 #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY
159
160 XFRM_MSG_ALLOCSPI,
161 #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI
162 XFRM_MSG_ACQUIRE,
163 #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE
164 XFRM_MSG_EXPIRE,
165 #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE
166
167 XFRM_MSG_UPDPOLICY,
168 #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY
169 XFRM_MSG_UPDSA,
170 #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA
171
172 XFRM_MSG_POLEXPIRE,
173 #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE
174
175 XFRM_MSG_FLUSHSA,
176 #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA
177 XFRM_MSG_FLUSHPOLICY,
178 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
179
180 XFRM_MSG_NEWAE,
181 #define XFRM_MSG_NEWAE XFRM_MSG_NEWAE
182 XFRM_MSG_GETAE,
183 #define XFRM_MSG_GETAE XFRM_MSG_GETAE
184
185 XFRM_MSG_REPORT,
186 #define XFRM_MSG_REPORT XFRM_MSG_REPORT
187
188 XFRM_MSG_MIGRATE,
189 #define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE
190
191 XFRM_MSG_NEWSADINFO,
192 #define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO
193 XFRM_MSG_GETSADINFO,
194 #define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO
195
196 XFRM_MSG_NEWSPDINFO,
197 #define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO
198 XFRM_MSG_GETSPDINFO,
199 #define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO
200
201 XFRM_MSG_MAPPING,
202 #define XFRM_MSG_MAPPING XFRM_MSG_MAPPING
203 __XFRM_MSG_MAX
204 };
205 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
206
207 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
208
209 /*
210 * Generic LSM security context for comunicating to user space
211 * NOTE: Same format as sadb_x_sec_ctx
212 */
213 struct xfrm_user_sec_ctx {
214 __u16 len;
215 __u16 exttype;
216 __u8 ctx_alg; /* LSMs: e.g., selinux == 1 */
217 __u8 ctx_doi;
218 __u16 ctx_len;
219 };
220
221 struct xfrm_user_tmpl {
222 struct xfrm_id id;
223 __u16 family;
224 xfrm_address_t saddr;
225 __u32 reqid;
226 __u8 mode;
227 __u8 share;
228 __u8 optional;
229 __u32 aalgos;
230 __u32 ealgos;
231 __u32 calgos;
232 };
233
234 struct xfrm_encap_tmpl {
235 __u16 encap_type;
236 __be16 encap_sport;
237 __be16 encap_dport;
238 xfrm_address_t encap_oa;
239 };
240
241 /* AEVENT flags */
242 enum xfrm_ae_ftype_t {
243 XFRM_AE_UNSPEC,
244 XFRM_AE_RTHR=1, /* replay threshold*/
245 XFRM_AE_RVAL=2, /* replay value */
246 XFRM_AE_LVAL=4, /* lifetime value */
247 XFRM_AE_ETHR=8, /* expiry timer threshold */
248 XFRM_AE_CR=16, /* Event cause is replay update */
249 XFRM_AE_CE=32, /* Event cause is timer expiry */
250 XFRM_AE_CU=64, /* Event cause is policy update */
251 __XFRM_AE_MAX
252
253 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1)
254 };
255
256 struct xfrm_userpolicy_type {
257 __u8 type;
258 __u16 reserved1;
259 __u8 reserved2;
260 };
261
262 /* Netlink message attributes. */
263 enum xfrm_attr_type_t {
264 XFRMA_UNSPEC,
265 XFRMA_ALG_AUTH, /* struct xfrm_algo */
266 XFRMA_ALG_CRYPT, /* struct xfrm_algo */
267 XFRMA_ALG_COMP, /* struct xfrm_algo */
268 XFRMA_ENCAP, /* struct xfrm_algo + struct xfrm_encap_tmpl */
269 XFRMA_TMPL, /* 1 or more struct xfrm_user_tmpl */
270 XFRMA_SA, /* struct xfrm_usersa_info */
271 XFRMA_POLICY, /*struct xfrm_userpolicy_info */
272 XFRMA_SEC_CTX, /* struct xfrm_sec_ctx */
273 XFRMA_LTIME_VAL,
274 XFRMA_REPLAY_VAL,
275 XFRMA_REPLAY_THRESH,
276 XFRMA_ETIMER_THRESH,
277 XFRMA_SRCADDR, /* xfrm_address_t */
278 XFRMA_COADDR, /* xfrm_address_t */
279 XFRMA_LASTUSED, /* unsigned long */
280 XFRMA_POLICY_TYPE, /* struct xfrm_userpolicy_type */
281 XFRMA_MIGRATE,
282 XFRMA_ALG_AEAD, /* struct xfrm_algo_aead */
283 XFRMA_KMADDRESS, /* struct xfrm_user_kmaddress */
284 XFRMA_ALG_AUTH_TRUNC, /* struct xfrm_algo_auth */
285 XFRMA_MARK, /* struct xfrm_mark */
286 XFRMA_TFCPAD, /* __u32 */
287 __XFRMA_MAX
288
289 #define XFRMA_MAX (__XFRMA_MAX - 1)
290 };
291
292 struct xfrm_mark {
293 __u32 v; /* value */
294 __u32 m; /* mask */
295 };
296
297 enum xfrm_sadattr_type_t {
298 XFRMA_SAD_UNSPEC,
299 XFRMA_SAD_CNT,
300 XFRMA_SAD_HINFO,
301 __XFRMA_SAD_MAX
302
303 #define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1)
304 };
305
306 struct xfrmu_sadhinfo {
307 __u32 sadhcnt; /* current hash bkts */
308 __u32 sadhmcnt; /* max allowed hash bkts */
309 };
310
311 enum xfrm_spdattr_type_t {
312 XFRMA_SPD_UNSPEC,
313 XFRMA_SPD_INFO,
314 XFRMA_SPD_HINFO,
315 __XFRMA_SPD_MAX
316
317 #define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1)
318 };
319
320 struct xfrmu_spdinfo {
321 __u32 incnt;
322 __u32 outcnt;
323 __u32 fwdcnt;
324 __u32 inscnt;
325 __u32 outscnt;
326 __u32 fwdscnt;
327 };
328
329 struct xfrmu_spdhinfo {
330 __u32 spdhcnt;
331 __u32 spdhmcnt;
332 };
333
334 struct xfrm_usersa_info {
335 struct xfrm_selector sel;
336 struct xfrm_id id;
337 xfrm_address_t saddr;
338 struct xfrm_lifetime_cfg lft;
339 struct xfrm_lifetime_cur curlft;
340 struct xfrm_stats stats;
341 __u32 seq;
342 __u32 reqid;
343 __u16 family;
344 __u8 mode; /* XFRM_MODE_xxx */
345 __u8 replay_window;
346 __u8 flags;
347 #define XFRM_STATE_NOECN 1
348 #define XFRM_STATE_DECAP_DSCP 2
349 #define XFRM_STATE_NOPMTUDISC 4
350 #define XFRM_STATE_WILDRECV 8
351 #define XFRM_STATE_ICMP 16
352 #define XFRM_STATE_AF_UNSPEC 32
353 };
354
355 struct xfrm_usersa_id {
356 xfrm_address_t daddr;
357 __be32 spi;
358 __u16 family;
359 __u8 proto;
360 };
361
362 struct xfrm_aevent_id {
363 struct xfrm_usersa_id sa_id;
364 xfrm_address_t saddr;
365 __u32 flags;
366 __u32 reqid;
367 };
368
369 struct xfrm_userspi_info {
370 struct xfrm_usersa_info info;
371 __u32 min;
372 __u32 max;
373 };
374
375 struct xfrm_userpolicy_info {
376 struct xfrm_selector sel;
377 struct xfrm_lifetime_cfg lft;
378 struct xfrm_lifetime_cur curlft;
379 __u32 priority;
380 __u32 index;
381 __u8 dir;
382 __u8 action;
383 #define XFRM_POLICY_ALLOW 0
384 #define XFRM_POLICY_BLOCK 1
385 __u8 flags;
386 #define XFRM_POLICY_LOCALOK 1 /* Allow user to override global policy */
387 /* Automatically expand selector to include matching ICMP payloads. */
388 #define XFRM_POLICY_ICMP 2
389 __u8 share;
390 };
391
392 struct xfrm_userpolicy_id {
393 struct xfrm_selector sel;
394 __u32 index;
395 __u8 dir;
396 };
397
398 struct xfrm_user_acquire {
399 struct xfrm_id id;
400 xfrm_address_t saddr;
401 struct xfrm_selector sel;
402 struct xfrm_userpolicy_info policy;
403 __u32 aalgos;
404 __u32 ealgos;
405 __u32 calgos;
406 __u32 seq;
407 };
408
409 struct xfrm_user_expire {
410 struct xfrm_usersa_info state;
411 __u8 hard;
412 };
413
414 struct xfrm_user_polexpire {
415 struct xfrm_userpolicy_info pol;
416 __u8 hard;
417 };
418
419 struct xfrm_usersa_flush {
420 __u8 proto;
421 };
422
423 struct xfrm_user_report {
424 __u8 proto;
425 struct xfrm_selector sel;
426 };
427
428 /* Used by MIGRATE to pass addresses IKE should use to perform
429 * SA negotiation with the peer */
430 struct xfrm_user_kmaddress {
431 xfrm_address_t local;
432 xfrm_address_t remote;
433 __u32 reserved;
434 __u16 family;
435 };
436
437 struct xfrm_user_migrate {
438 xfrm_address_t old_daddr;
439 xfrm_address_t old_saddr;
440 xfrm_address_t new_daddr;
441 xfrm_address_t new_saddr;
442 __u8 proto;
443 __u8 mode;
444 __u16 reserved;
445 __u32 reqid;
446 __u16 old_family;
447 __u16 new_family;
448 };
449
450 struct xfrm_user_mapping {
451 struct xfrm_usersa_id id;
452 __u32 reqid;
453 xfrm_address_t old_saddr;
454 xfrm_address_t new_saddr;
455 __be16 old_sport;
456 __be16 new_sport;
457 };
458
459 #ifndef __KERNEL__
460 /* backwards compatibility for userspace */
461 #define XFRMGRP_ACQUIRE 1
462 #define XFRMGRP_EXPIRE 2
463 #define XFRMGRP_SA 4
464 #define XFRMGRP_POLICY 8
465 #define XFRMGRP_REPORT 0x20
466 #endif
467
468 enum xfrm_nlgroups {
469 XFRMNLGRP_NONE,
470 #define XFRMNLGRP_NONE XFRMNLGRP_NONE
471 XFRMNLGRP_ACQUIRE,
472 #define XFRMNLGRP_ACQUIRE XFRMNLGRP_ACQUIRE
473 XFRMNLGRP_EXPIRE,
474 #define XFRMNLGRP_EXPIRE XFRMNLGRP_EXPIRE
475 XFRMNLGRP_SA,
476 #define XFRMNLGRP_SA XFRMNLGRP_SA
477 XFRMNLGRP_POLICY,
478 #define XFRMNLGRP_POLICY XFRMNLGRP_POLICY
479 XFRMNLGRP_AEVENTS,
480 #define XFRMNLGRP_AEVENTS XFRMNLGRP_AEVENTS
481 XFRMNLGRP_REPORT,
482 #define XFRMNLGRP_REPORT XFRMNLGRP_REPORT
483 XFRMNLGRP_MIGRATE,
484 #define XFRMNLGRP_MIGRATE XFRMNLGRP_MIGRATE
485 XFRMNLGRP_MAPPING,
486 #define XFRMNLGRP_MAPPING XFRMNLGRP_MAPPING
487 __XFRMNLGRP_MAX
488 };
489 #define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1)
490
491 #endif /* _LINUX_XFRM_H */