Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _LINUX_XFRM_H
3#define _LINUX_XFRM_H
4
5#include <linux/in6.h>
6#include <linux/types.h>
7#include <linux/stddef.h>
8
9/* All of the structures in this file may not change size as they are
10 * passed into the kernel from userspace via netlink sockets.
11 */
12
13/* Structure to encapsulate addresses. I do not want to use
14 * "standard" structure. My apologies.
15 */
16typedef union {
17 __be32 a4;
18 __be32 a6[4];
19 struct in6_addr in6;
20} xfrm_address_t;
21
22/* Ident of a specific xfrm_state. It is used on input to lookup
23 * the state by (spi,daddr,ah/esp) or to store information about
24 * spi, protocol and tunnel address on output.
25 */
26struct xfrm_id {
27 xfrm_address_t daddr;
28 __be32 spi;
29 __u8 proto;
30};
31
32struct xfrm_sec_ctx {
33 __u8 ctx_doi;
34 __u8 ctx_alg;
35 __u16 ctx_len;
36 __u32 ctx_sid;
37 char ctx_str[] __counted_by(ctx_len);
38};
39
40/* Security Context Domains of Interpretation */
41#define XFRM_SC_DOI_RESERVED 0
42#define XFRM_SC_DOI_LSM 1
43
44/* Security Context Algorithms */
45#define XFRM_SC_ALG_RESERVED 0
46#define XFRM_SC_ALG_SELINUX 1
47
48/* Selector, used as selector both on policy rules (SPD) and SAs. */
49
50struct xfrm_selector {
51 xfrm_address_t daddr;
52 xfrm_address_t saddr;
53 __be16 dport;
54 __be16 dport_mask;
55 __be16 sport;
56 __be16 sport_mask;
57 __u16 family;
58 __u8 prefixlen_d;
59 __u8 prefixlen_s;
60 __u8 proto;
61 int ifindex;
62 __kernel_uid32_t user;
63};
64
65#define XFRM_INF (~(__u64)0)
66
67struct xfrm_lifetime_cfg {
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
78struct xfrm_lifetime_cur {
79 __u64 bytes;
80 __u64 packets;
81 __u64 add_time;
82 __u64 use_time;
83};
84
85struct xfrm_replay_state {
86 __u32 oseq;
87 __u32 seq;
88 __u32 bitmap;
89};
90
91#define XFRMA_REPLAY_ESN_MAX 4096
92
93struct xfrm_replay_state_esn {
94 unsigned int bmp_len;
95 __u32 oseq;
96 __u32 seq;
97 __u32 oseq_hi;
98 __u32 seq_hi;
99 __u32 replay_window;
100 __u32 bmp[];
101};
102
103struct xfrm_algo {
104 char alg_name[64];
105 unsigned int alg_key_len; /* in bits */
106 char alg_key[];
107};
108
109struct xfrm_algo_auth {
110 char alg_name[64];
111 unsigned int alg_key_len; /* in bits */
112 unsigned int alg_trunc_len; /* in bits */
113 char alg_key[];
114};
115
116struct xfrm_algo_aead {
117 char alg_name[64];
118 unsigned int alg_key_len; /* in bits */
119 unsigned int alg_icv_len; /* in bits */
120 char alg_key[];
121};
122
123struct xfrm_stats {
124 __u32 replay_window;
125 __u32 replay;
126 __u32 integrity_failed;
127};
128
129enum {
130 XFRM_POLICY_TYPE_MAIN = 0,
131 XFRM_POLICY_TYPE_SUB = 1,
132 XFRM_POLICY_TYPE_MAX = 2,
133 XFRM_POLICY_TYPE_ANY = 255
134};
135
136enum {
137 XFRM_POLICY_IN = 0,
138 XFRM_POLICY_OUT = 1,
139 XFRM_POLICY_FWD = 2,
140 XFRM_POLICY_MASK = 3,
141 XFRM_POLICY_MAX = 3
142};
143
144enum xfrm_sa_dir {
145 XFRM_SA_DIR_IN = 1,
146 XFRM_SA_DIR_OUT = 2
147};
148
149enum {
150 XFRM_SHARE_ANY, /* No limitations */
151 XFRM_SHARE_SESSION, /* For this session only */
152 XFRM_SHARE_USER, /* For this user only */
153 XFRM_SHARE_UNIQUE /* Use once */
154};
155
156#define XFRM_MODE_TRANSPORT 0
157#define XFRM_MODE_TUNNEL 1
158#define XFRM_MODE_ROUTEOPTIMIZATION 2
159#define XFRM_MODE_IN_TRIGGER 3
160#define XFRM_MODE_BEET 4
161#define XFRM_MODE_MAX 5
162
163/* Netlink configuration messages. */
164enum {
165 XFRM_MSG_BASE = 0x10,
166
167 XFRM_MSG_NEWSA = 0x10,
168#define XFRM_MSG_NEWSA XFRM_MSG_NEWSA
169 XFRM_MSG_DELSA,
170#define XFRM_MSG_DELSA XFRM_MSG_DELSA
171 XFRM_MSG_GETSA,
172#define XFRM_MSG_GETSA XFRM_MSG_GETSA
173
174 XFRM_MSG_NEWPOLICY,
175#define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY
176 XFRM_MSG_DELPOLICY,
177#define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY
178 XFRM_MSG_GETPOLICY,
179#define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY
180
181 XFRM_MSG_ALLOCSPI,
182#define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI
183 XFRM_MSG_ACQUIRE,
184#define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE
185 XFRM_MSG_EXPIRE,
186#define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE
187
188 XFRM_MSG_UPDPOLICY,
189#define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY
190 XFRM_MSG_UPDSA,
191#define XFRM_MSG_UPDSA XFRM_MSG_UPDSA
192
193 XFRM_MSG_POLEXPIRE,
194#define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE
195
196 XFRM_MSG_FLUSHSA,
197#define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA
198 XFRM_MSG_FLUSHPOLICY,
199#define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
200
201 XFRM_MSG_NEWAE,
202#define XFRM_MSG_NEWAE XFRM_MSG_NEWAE
203 XFRM_MSG_GETAE,
204#define XFRM_MSG_GETAE XFRM_MSG_GETAE
205
206 XFRM_MSG_REPORT,
207#define XFRM_MSG_REPORT XFRM_MSG_REPORT
208
209 XFRM_MSG_MIGRATE,
210#define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE
211
212 XFRM_MSG_NEWSADINFO,
213#define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO
214 XFRM_MSG_GETSADINFO,
215#define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO
216
217 XFRM_MSG_NEWSPDINFO,
218#define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO
219 XFRM_MSG_GETSPDINFO,
220#define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO
221
222 XFRM_MSG_MAPPING,
223#define XFRM_MSG_MAPPING XFRM_MSG_MAPPING
224
225 XFRM_MSG_SETDEFAULT,
226#define XFRM_MSG_SETDEFAULT XFRM_MSG_SETDEFAULT
227 XFRM_MSG_GETDEFAULT,
228#define XFRM_MSG_GETDEFAULT XFRM_MSG_GETDEFAULT
229 __XFRM_MSG_MAX
230};
231#define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
232
233#define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
234
235/*
236 * Generic LSM security context for communicating to user space
237 * NOTE: Same format as sadb_x_sec_ctx
238 */
239struct xfrm_user_sec_ctx {
240 __u16 len;
241 __u16 exttype;
242 __u8 ctx_alg; /* LSMs: e.g., selinux == 1 */
243 __u8 ctx_doi;
244 __u16 ctx_len;
245};
246
247struct xfrm_user_tmpl {
248 struct xfrm_id id;
249 __u16 family;
250 xfrm_address_t saddr;
251 __u32 reqid;
252 __u8 mode;
253 __u8 share;
254 __u8 optional;
255 __u32 aalgos;
256 __u32 ealgos;
257 __u32 calgos;
258};
259
260struct xfrm_encap_tmpl {
261 __u16 encap_type;
262 __be16 encap_sport;
263 __be16 encap_dport;
264 xfrm_address_t encap_oa;
265};
266
267/* AEVENT flags */
268enum xfrm_ae_ftype_t {
269 XFRM_AE_UNSPEC,
270 XFRM_AE_RTHR=1, /* replay threshold*/
271 XFRM_AE_RVAL=2, /* replay value */
272 XFRM_AE_LVAL=4, /* lifetime value */
273 XFRM_AE_ETHR=8, /* expiry timer threshold */
274 XFRM_AE_CR=16, /* Event cause is replay update */
275 XFRM_AE_CE=32, /* Event cause is timer expiry */
276 XFRM_AE_CU=64, /* Event cause is policy update */
277 __XFRM_AE_MAX
278
279#define XFRM_AE_MAX (__XFRM_AE_MAX - 1)
280};
281
282struct xfrm_userpolicy_type {
283 __u8 type;
284 __u16 reserved1;
285 __u8 reserved2;
286};
287
288/* Netlink message attributes. */
289enum xfrm_attr_type_t {
290 XFRMA_UNSPEC,
291 XFRMA_ALG_AUTH, /* struct xfrm_algo */
292 XFRMA_ALG_CRYPT, /* struct xfrm_algo */
293 XFRMA_ALG_COMP, /* struct xfrm_algo */
294 XFRMA_ENCAP, /* struct xfrm_algo + struct xfrm_encap_tmpl */
295 XFRMA_TMPL, /* 1 or more struct xfrm_user_tmpl */
296 XFRMA_SA, /* struct xfrm_usersa_info */
297 XFRMA_POLICY, /*struct xfrm_userpolicy_info */
298 XFRMA_SEC_CTX, /* struct xfrm_sec_ctx */
299 XFRMA_LTIME_VAL,
300 XFRMA_REPLAY_VAL,
301 XFRMA_REPLAY_THRESH,
302 XFRMA_ETIMER_THRESH,
303 XFRMA_SRCADDR, /* xfrm_address_t */
304 XFRMA_COADDR, /* xfrm_address_t */
305 XFRMA_LASTUSED, /* __u64 */
306 XFRMA_POLICY_TYPE, /* struct xfrm_userpolicy_type */
307 XFRMA_MIGRATE,
308 XFRMA_ALG_AEAD, /* struct xfrm_algo_aead */
309 XFRMA_KMADDRESS, /* struct xfrm_user_kmaddress */
310 XFRMA_ALG_AUTH_TRUNC, /* struct xfrm_algo_auth */
311 XFRMA_MARK, /* struct xfrm_mark */
312 XFRMA_TFCPAD, /* __u32 */
313 XFRMA_REPLAY_ESN_VAL, /* struct xfrm_replay_state_esn */
314 XFRMA_SA_EXTRA_FLAGS, /* __u32 */
315 XFRMA_PROTO, /* __u8 */
316 XFRMA_ADDRESS_FILTER, /* struct xfrm_address_filter */
317 XFRMA_PAD,
318 XFRMA_OFFLOAD_DEV, /* struct xfrm_user_offload */
319 XFRMA_SET_MARK, /* __u32 */
320 XFRMA_SET_MARK_MASK, /* __u32 */
321 XFRMA_IF_ID, /* __u32 */
322 XFRMA_MTIMER_THRESH, /* __u32 in seconds for input SA */
323 XFRMA_SA_DIR, /* __u8 */
324 __XFRMA_MAX
325
326#define XFRMA_OUTPUT_MARK XFRMA_SET_MARK /* Compatibility */
327#define XFRMA_MAX (__XFRMA_MAX - 1)
328};
329
330struct xfrm_mark {
331 __u32 v; /* value */
332 __u32 m; /* mask */
333};
334
335enum xfrm_sadattr_type_t {
336 XFRMA_SAD_UNSPEC,
337 XFRMA_SAD_CNT,
338 XFRMA_SAD_HINFO,
339 __XFRMA_SAD_MAX
340
341#define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1)
342};
343
344struct xfrmu_sadhinfo {
345 __u32 sadhcnt; /* current hash bkts */
346 __u32 sadhmcnt; /* max allowed hash bkts */
347};
348
349enum xfrm_spdattr_type_t {
350 XFRMA_SPD_UNSPEC,
351 XFRMA_SPD_INFO,
352 XFRMA_SPD_HINFO,
353 XFRMA_SPD_IPV4_HTHRESH,
354 XFRMA_SPD_IPV6_HTHRESH,
355 __XFRMA_SPD_MAX
356
357#define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1)
358};
359
360struct xfrmu_spdinfo {
361 __u32 incnt;
362 __u32 outcnt;
363 __u32 fwdcnt;
364 __u32 inscnt;
365 __u32 outscnt;
366 __u32 fwdscnt;
367};
368
369struct xfrmu_spdhinfo {
370 __u32 spdhcnt;
371 __u32 spdhmcnt;
372};
373
374struct xfrmu_spdhthresh {
375 __u8 lbits;
376 __u8 rbits;
377};
378
379struct xfrm_usersa_info {
380 struct xfrm_selector sel;
381 struct xfrm_id id;
382 xfrm_address_t saddr;
383 struct xfrm_lifetime_cfg lft;
384 struct xfrm_lifetime_cur curlft;
385 struct xfrm_stats stats;
386 __u32 seq;
387 __u32 reqid;
388 __u16 family;
389 __u8 mode; /* XFRM_MODE_xxx */
390 __u8 replay_window;
391 __u8 flags;
392#define XFRM_STATE_NOECN 1
393#define XFRM_STATE_DECAP_DSCP 2
394#define XFRM_STATE_NOPMTUDISC 4
395#define XFRM_STATE_WILDRECV 8
396#define XFRM_STATE_ICMP 16
397#define XFRM_STATE_AF_UNSPEC 32
398#define XFRM_STATE_ALIGN4 64
399#define XFRM_STATE_ESN 128
400};
401
402#define XFRM_SA_XFLAG_DONT_ENCAP_DSCP 1
403#define XFRM_SA_XFLAG_OSEQ_MAY_WRAP 2
404
405struct xfrm_usersa_id {
406 xfrm_address_t daddr;
407 __be32 spi;
408 __u16 family;
409 __u8 proto;
410};
411
412struct xfrm_aevent_id {
413 struct xfrm_usersa_id sa_id;
414 xfrm_address_t saddr;
415 __u32 flags;
416 __u32 reqid;
417};
418
419struct xfrm_userspi_info {
420 struct xfrm_usersa_info info;
421 __u32 min;
422 __u32 max;
423};
424
425struct xfrm_userpolicy_info {
426 struct xfrm_selector sel;
427 struct xfrm_lifetime_cfg lft;
428 struct xfrm_lifetime_cur curlft;
429 __u32 priority;
430 __u32 index;
431 __u8 dir;
432 __u8 action;
433#define XFRM_POLICY_ALLOW 0
434#define XFRM_POLICY_BLOCK 1
435 __u8 flags;
436#define XFRM_POLICY_LOCALOK 1 /* Allow user to override global policy */
437 /* Automatically expand selector to include matching ICMP payloads. */
438#define XFRM_POLICY_ICMP 2
439 __u8 share;
440};
441
442struct xfrm_userpolicy_id {
443 struct xfrm_selector sel;
444 __u32 index;
445 __u8 dir;
446};
447
448struct xfrm_user_acquire {
449 struct xfrm_id id;
450 xfrm_address_t saddr;
451 struct xfrm_selector sel;
452 struct xfrm_userpolicy_info policy;
453 __u32 aalgos;
454 __u32 ealgos;
455 __u32 calgos;
456 __u32 seq;
457};
458
459struct xfrm_user_expire {
460 struct xfrm_usersa_info state;
461 __u8 hard;
462};
463
464struct xfrm_user_polexpire {
465 struct xfrm_userpolicy_info pol;
466 __u8 hard;
467};
468
469struct xfrm_usersa_flush {
470 __u8 proto;
471};
472
473struct xfrm_user_report {
474 __u8 proto;
475 struct xfrm_selector sel;
476};
477
478/* Used by MIGRATE to pass addresses IKE should use to perform
479 * SA negotiation with the peer */
480struct xfrm_user_kmaddress {
481 xfrm_address_t local;
482 xfrm_address_t remote;
483 __u32 reserved;
484 __u16 family;
485};
486
487struct xfrm_user_migrate {
488 xfrm_address_t old_daddr;
489 xfrm_address_t old_saddr;
490 xfrm_address_t new_daddr;
491 xfrm_address_t new_saddr;
492 __u8 proto;
493 __u8 mode;
494 __u16 reserved;
495 __u32 reqid;
496 __u16 old_family;
497 __u16 new_family;
498};
499
500struct xfrm_user_mapping {
501 struct xfrm_usersa_id id;
502 __u32 reqid;
503 xfrm_address_t old_saddr;
504 xfrm_address_t new_saddr;
505 __be16 old_sport;
506 __be16 new_sport;
507};
508
509struct xfrm_address_filter {
510 xfrm_address_t saddr;
511 xfrm_address_t daddr;
512 __u16 family;
513 __u8 splen;
514 __u8 dplen;
515};
516
517struct xfrm_user_offload {
518 int ifindex;
519 __u8 flags;
520};
521/* This flag was exposed without any kernel code that supports it.
522 * Unfortunately, strongswan has the code that sets this flag,
523 * which makes it impossible to reuse this bit.
524 *
525 * So leave it here to make sure that it won't be reused by mistake.
526 */
527#define XFRM_OFFLOAD_IPV6 1
528#define XFRM_OFFLOAD_INBOUND 2
529/* Two bits above are relevant for state path only, while
530 * offload is used for both policy and state flows.
531 *
532 * In policy offload mode, they are free and can be safely reused.
533 */
534#define XFRM_OFFLOAD_PACKET 4
535
536struct xfrm_userpolicy_default {
537#define XFRM_USERPOLICY_UNSPEC 0
538#define XFRM_USERPOLICY_BLOCK 1
539#define XFRM_USERPOLICY_ACCEPT 2
540 __u8 in;
541 __u8 fwd;
542 __u8 out;
543};
544
545#ifndef __KERNEL__
546/* backwards compatibility for userspace */
547#define XFRMGRP_ACQUIRE 1
548#define XFRMGRP_EXPIRE 2
549#define XFRMGRP_SA 4
550#define XFRMGRP_POLICY 8
551#define XFRMGRP_REPORT 0x20
552#endif
553
554enum xfrm_nlgroups {
555 XFRMNLGRP_NONE,
556#define XFRMNLGRP_NONE XFRMNLGRP_NONE
557 XFRMNLGRP_ACQUIRE,
558#define XFRMNLGRP_ACQUIRE XFRMNLGRP_ACQUIRE
559 XFRMNLGRP_EXPIRE,
560#define XFRMNLGRP_EXPIRE XFRMNLGRP_EXPIRE
561 XFRMNLGRP_SA,
562#define XFRMNLGRP_SA XFRMNLGRP_SA
563 XFRMNLGRP_POLICY,
564#define XFRMNLGRP_POLICY XFRMNLGRP_POLICY
565 XFRMNLGRP_AEVENTS,
566#define XFRMNLGRP_AEVENTS XFRMNLGRP_AEVENTS
567 XFRMNLGRP_REPORT,
568#define XFRMNLGRP_REPORT XFRMNLGRP_REPORT
569 XFRMNLGRP_MIGRATE,
570#define XFRMNLGRP_MIGRATE XFRMNLGRP_MIGRATE
571 XFRMNLGRP_MAPPING,
572#define XFRMNLGRP_MAPPING XFRMNLGRP_MAPPING
573 __XFRMNLGRP_MAX
574};
575#define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1)
576
577#endif /* _LINUX_XFRM_H */