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Linux/include/uapi/linux/xfrm.h

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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 
  8 /* All of the structures in this file may not change size as they are
  9  * passed into the kernel from userspace via netlink sockets.
 10  */
 11 
 12 /* Structure to encapsulate addresses. I do not want to use
 13  * "standard" structure. My apologies.
 14  */
 15 typedef union {
 16         __be32          a4;
 17         __be32          a6[4];
 18         struct in6_addr in6;
 19 } xfrm_address_t;
 20 
 21 /* Ident of a specific xfrm_state. It is used on input to lookup
 22  * the state by (spi,daddr,ah/esp) or to store information about
 23  * spi, protocol and tunnel address on output.
 24  */
 25 struct xfrm_id {
 26         xfrm_address_t  daddr;
 27         __be32          spi;
 28         __u8            proto;
 29 };
 30 
 31 struct xfrm_sec_ctx {
 32         __u8    ctx_doi;
 33         __u8    ctx_alg;
 34         __u16   ctx_len;
 35         __u32   ctx_sid;
 36         char    ctx_str[0];
 37 };
 38 
 39 /* Security Context Domains of Interpretation */
 40 #define XFRM_SC_DOI_RESERVED 0
 41 #define XFRM_SC_DOI_LSM 1
 42 
 43 /* Security Context Algorithms */
 44 #define XFRM_SC_ALG_RESERVED 0
 45 #define XFRM_SC_ALG_SELINUX 1
 46 
 47 /* Selector, used as selector both on policy rules (SPD) and SAs. */
 48 
 49 struct xfrm_selector {
 50         xfrm_address_t  daddr;
 51         xfrm_address_t  saddr;
 52         __be16  dport;
 53         __be16  dport_mask;
 54         __be16  sport;
 55         __be16  sport_mask;
 56         __u16   family;
 57         __u8    prefixlen_d;
 58         __u8    prefixlen_s;
 59         __u8    proto;
 60         int     ifindex;
 61         __kernel_uid32_t        user;
 62 };
 63 
 64 #define XFRM_INF (~(__u64)0)
 65 
 66 struct xfrm_lifetime_cfg {
 67         __u64   soft_byte_limit;
 68         __u64   hard_byte_limit;
 69         __u64   soft_packet_limit;
 70         __u64   hard_packet_limit;
 71         __u64   soft_add_expires_seconds;
 72         __u64   hard_add_expires_seconds;
 73         __u64   soft_use_expires_seconds;
 74         __u64   hard_use_expires_seconds;
 75 };
 76 
 77 struct xfrm_lifetime_cur {
 78         __u64   bytes;
 79         __u64   packets;
 80         __u64   add_time;
 81         __u64   use_time;
 82 };
 83 
 84 struct xfrm_replay_state {
 85         __u32   oseq;
 86         __u32   seq;
 87         __u32   bitmap;
 88 };
 89 
 90 #define XFRMA_REPLAY_ESN_MAX    4096
 91 
 92 struct xfrm_replay_state_esn {
 93         unsigned int    bmp_len;
 94         __u32           oseq;
 95         __u32           seq;
 96         __u32           oseq_hi;
 97         __u32           seq_hi;
 98         __u32           replay_window;
 99         __u32           bmp[0];
100 };
101 
102 struct xfrm_algo {
103         char            alg_name[64];
104         unsigned int    alg_key_len;    /* in bits */
105         char            alg_key[0];
106 };
107 
108 struct xfrm_algo_auth {
109         char            alg_name[64];
110         unsigned int    alg_key_len;    /* in bits */
111         unsigned int    alg_trunc_len;  /* in bits */
112         char            alg_key[0];
113 };
114 
115 struct xfrm_algo_aead {
116         char            alg_name[64];
117         unsigned int    alg_key_len;    /* in bits */
118         unsigned int    alg_icv_len;    /* in bits */
119         char            alg_key[0];
120 };
121 
122 struct xfrm_stats {
123         __u32   replay_window;
124         __u32   replay;
125         __u32   integrity_failed;
126 };
127 
128 enum {
129         XFRM_POLICY_TYPE_MAIN   = 0,
130         XFRM_POLICY_TYPE_SUB    = 1,
131         XFRM_POLICY_TYPE_MAX    = 2,
132         XFRM_POLICY_TYPE_ANY    = 255
133 };
134 
135 enum {
136         XFRM_POLICY_IN  = 0,
137         XFRM_POLICY_OUT = 1,
138         XFRM_POLICY_FWD = 2,
139         XFRM_POLICY_MASK = 3,
140         XFRM_POLICY_MAX = 3
141 };
142 
143 enum {
144         XFRM_SHARE_ANY,         /* No limitations */
145         XFRM_SHARE_SESSION,     /* For this session only */
146         XFRM_SHARE_USER,        /* For this user only */
147         XFRM_SHARE_UNIQUE       /* Use once */
148 };
149 
150 #define XFRM_MODE_TRANSPORT 0
151 #define XFRM_MODE_TUNNEL 1
152 #define XFRM_MODE_ROUTEOPTIMIZATION 2
153 #define XFRM_MODE_IN_TRIGGER 3
154 #define XFRM_MODE_BEET 4
155 #define XFRM_MODE_MAX 5
156 
157 /* Netlink configuration messages.  */
158 enum {
159         XFRM_MSG_BASE = 0x10,
160 
161         XFRM_MSG_NEWSA = 0x10,
162 #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA
163         XFRM_MSG_DELSA,
164 #define XFRM_MSG_DELSA XFRM_MSG_DELSA
165         XFRM_MSG_GETSA,
166 #define XFRM_MSG_GETSA XFRM_MSG_GETSA
167 
168         XFRM_MSG_NEWPOLICY,
169 #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY
170         XFRM_MSG_DELPOLICY,
171 #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY
172         XFRM_MSG_GETPOLICY,
173 #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY
174 
175         XFRM_MSG_ALLOCSPI,
176 #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI
177         XFRM_MSG_ACQUIRE,
178 #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE
179         XFRM_MSG_EXPIRE,
180 #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE
181 
182         XFRM_MSG_UPDPOLICY,
183 #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY
184         XFRM_MSG_UPDSA,
185 #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA
186 
187         XFRM_MSG_POLEXPIRE,
188 #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE
189 
190         XFRM_MSG_FLUSHSA,
191 #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA
192         XFRM_MSG_FLUSHPOLICY,
193 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
194 
195         XFRM_MSG_NEWAE,
196 #define XFRM_MSG_NEWAE XFRM_MSG_NEWAE
197         XFRM_MSG_GETAE,
198 #define XFRM_MSG_GETAE XFRM_MSG_GETAE
199 
200         XFRM_MSG_REPORT,
201 #define XFRM_MSG_REPORT XFRM_MSG_REPORT
202 
203         XFRM_MSG_MIGRATE,
204 #define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE
205 
206         XFRM_MSG_NEWSADINFO,
207 #define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO
208         XFRM_MSG_GETSADINFO,
209 #define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO
210 
211         XFRM_MSG_NEWSPDINFO,
212 #define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO
213         XFRM_MSG_GETSPDINFO,
214 #define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO
215 
216         XFRM_MSG_MAPPING,
217 #define XFRM_MSG_MAPPING XFRM_MSG_MAPPING
218         __XFRM_MSG_MAX
219 };
220 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
221 
222 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
223 
224 /*
225  * Generic LSM security context for comunicating to user space
226  * NOTE: Same format as sadb_x_sec_ctx
227  */
228 struct xfrm_user_sec_ctx {
229         __u16                   len;
230         __u16                   exttype;
231         __u8                    ctx_alg;  /* LSMs: e.g., selinux == 1 */
232         __u8                    ctx_doi;
233         __u16                   ctx_len;
234 };
235 
236 struct xfrm_user_tmpl {
237         struct xfrm_id          id;
238         __u16                   family;
239         xfrm_address_t          saddr;
240         __u32                   reqid;
241         __u8                    mode;
242         __u8                    share;
243         __u8                    optional;
244         __u32                   aalgos;
245         __u32                   ealgos;
246         __u32                   calgos;
247 };
248 
249 struct xfrm_encap_tmpl {
250         __u16           encap_type;
251         __be16          encap_sport;
252         __be16          encap_dport;
253         xfrm_address_t  encap_oa;
254 };
255 
256 /* AEVENT flags  */
257 enum xfrm_ae_ftype_t {
258         XFRM_AE_UNSPEC,
259         XFRM_AE_RTHR=1, /* replay threshold*/
260         XFRM_AE_RVAL=2, /* replay value */
261         XFRM_AE_LVAL=4, /* lifetime value */
262         XFRM_AE_ETHR=8, /* expiry timer threshold */
263         XFRM_AE_CR=16, /* Event cause is replay update */
264         XFRM_AE_CE=32, /* Event cause is timer expiry */
265         XFRM_AE_CU=64, /* Event cause is policy update */
266         __XFRM_AE_MAX
267 
268 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1)
269 };
270 
271 struct xfrm_userpolicy_type {
272         __u8            type;
273         __u16           reserved1;
274         __u8            reserved2;
275 };
276 
277 /* Netlink message attributes.  */
278 enum xfrm_attr_type_t {
279         XFRMA_UNSPEC,
280         XFRMA_ALG_AUTH,         /* struct xfrm_algo */
281         XFRMA_ALG_CRYPT,        /* struct xfrm_algo */
282         XFRMA_ALG_COMP,         /* struct xfrm_algo */
283         XFRMA_ENCAP,            /* struct xfrm_algo + struct xfrm_encap_tmpl */
284         XFRMA_TMPL,             /* 1 or more struct xfrm_user_tmpl */
285         XFRMA_SA,               /* struct xfrm_usersa_info  */
286         XFRMA_POLICY,           /*struct xfrm_userpolicy_info */
287         XFRMA_SEC_CTX,          /* struct xfrm_sec_ctx */
288         XFRMA_LTIME_VAL,
289         XFRMA_REPLAY_VAL,
290         XFRMA_REPLAY_THRESH,
291         XFRMA_ETIMER_THRESH,
292         XFRMA_SRCADDR,          /* xfrm_address_t */
293         XFRMA_COADDR,           /* xfrm_address_t */
294         XFRMA_LASTUSED,         /* unsigned long  */
295         XFRMA_POLICY_TYPE,      /* struct xfrm_userpolicy_type */
296         XFRMA_MIGRATE,
297         XFRMA_ALG_AEAD,         /* struct xfrm_algo_aead */
298         XFRMA_KMADDRESS,        /* struct xfrm_user_kmaddress */
299         XFRMA_ALG_AUTH_TRUNC,   /* struct xfrm_algo_auth */
300         XFRMA_MARK,             /* struct xfrm_mark */
301         XFRMA_TFCPAD,           /* __u32 */
302         XFRMA_REPLAY_ESN_VAL,   /* struct xfrm_replay_state_esn */
303         XFRMA_SA_EXTRA_FLAGS,   /* __u32 */
304         XFRMA_PROTO,            /* __u8 */
305         XFRMA_ADDRESS_FILTER,   /* struct xfrm_address_filter */
306         XFRMA_PAD,
307         XFRMA_OFFLOAD_DEV,      /* struct xfrm_user_offload */
308         XFRMA_SET_MARK,         /* __u32 */
309         XFRMA_SET_MARK_MASK,    /* __u32 */
310         XFRMA_IF_ID,            /* __u32 */
311         __XFRMA_MAX
312 
313 #define XFRMA_OUTPUT_MARK XFRMA_SET_MARK        /* Compatibility */
314 #define XFRMA_MAX (__XFRMA_MAX - 1)
315 };
316 
317 struct xfrm_mark {
318         __u32           v; /* value */
319         __u32           m; /* mask */
320 };
321 
322 enum xfrm_sadattr_type_t {
323         XFRMA_SAD_UNSPEC,
324         XFRMA_SAD_CNT,
325         XFRMA_SAD_HINFO,
326         __XFRMA_SAD_MAX
327 
328 #define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1)
329 };
330 
331 struct xfrmu_sadhinfo {
332         __u32 sadhcnt; /* current hash bkts */
333         __u32 sadhmcnt; /* max allowed hash bkts */
334 };
335 
336 enum xfrm_spdattr_type_t {
337         XFRMA_SPD_UNSPEC,
338         XFRMA_SPD_INFO,
339         XFRMA_SPD_HINFO,
340         XFRMA_SPD_IPV4_HTHRESH,
341         XFRMA_SPD_IPV6_HTHRESH,
342         __XFRMA_SPD_MAX
343 
344 #define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1)
345 };
346 
347 struct xfrmu_spdinfo {
348         __u32 incnt;
349         __u32 outcnt;
350         __u32 fwdcnt;
351         __u32 inscnt;
352         __u32 outscnt;
353         __u32 fwdscnt;
354 };
355 
356 struct xfrmu_spdhinfo {
357         __u32 spdhcnt;
358         __u32 spdhmcnt;
359 };
360 
361 struct xfrmu_spdhthresh {
362         __u8 lbits;
363         __u8 rbits;
364 };
365 
366 struct xfrm_usersa_info {
367         struct xfrm_selector            sel;
368         struct xfrm_id                  id;
369         xfrm_address_t                  saddr;
370         struct xfrm_lifetime_cfg        lft;
371         struct xfrm_lifetime_cur        curlft;
372         struct xfrm_stats               stats;
373         __u32                           seq;
374         __u32                           reqid;
375         __u16                           family;
376         __u8                            mode;           /* XFRM_MODE_xxx */
377         __u8                            replay_window;
378         __u8                            flags;
379 #define XFRM_STATE_NOECN        1
380 #define XFRM_STATE_DECAP_DSCP   2
381 #define XFRM_STATE_NOPMTUDISC   4
382 #define XFRM_STATE_WILDRECV     8
383 #define XFRM_STATE_ICMP         16
384 #define XFRM_STATE_AF_UNSPEC    32
385 #define XFRM_STATE_ALIGN4       64
386 #define XFRM_STATE_ESN          128
387 };
388 
389 #define XFRM_SA_XFLAG_DONT_ENCAP_DSCP   1
390 #define XFRM_SA_XFLAG_OSEQ_MAY_WRAP     2
391 
392 struct xfrm_usersa_id {
393         xfrm_address_t                  daddr;
394         __be32                          spi;
395         __u16                           family;
396         __u8                            proto;
397 };
398 
399 struct xfrm_aevent_id {
400         struct xfrm_usersa_id           sa_id;
401         xfrm_address_t                  saddr;
402         __u32                           flags;
403         __u32                           reqid;
404 };
405 
406 struct xfrm_userspi_info {
407         struct xfrm_usersa_info         info;
408         __u32                           min;
409         __u32                           max;
410 };
411 
412 struct xfrm_userpolicy_info {
413         struct xfrm_selector            sel;
414         struct xfrm_lifetime_cfg        lft;
415         struct xfrm_lifetime_cur        curlft;
416         __u32                           priority;
417         __u32                           index;
418         __u8                            dir;
419         __u8                            action;
420 #define XFRM_POLICY_ALLOW       0
421 #define XFRM_POLICY_BLOCK       1
422         __u8                            flags;
423 #define XFRM_POLICY_LOCALOK     1       /* Allow user to override global policy */
424         /* Automatically expand selector to include matching ICMP payloads. */
425 #define XFRM_POLICY_ICMP        2
426         __u8                            share;
427 };
428 
429 struct xfrm_userpolicy_id {
430         struct xfrm_selector            sel;
431         __u32                           index;
432         __u8                            dir;
433 };
434 
435 struct xfrm_user_acquire {
436         struct xfrm_id                  id;
437         xfrm_address_t                  saddr;
438         struct xfrm_selector            sel;
439         struct xfrm_userpolicy_info     policy;
440         __u32                           aalgos;
441         __u32                           ealgos;
442         __u32                           calgos;
443         __u32                           seq;
444 };
445 
446 struct xfrm_user_expire {
447         struct xfrm_usersa_info         state;
448         __u8                            hard;
449 };
450 
451 struct xfrm_user_polexpire {
452         struct xfrm_userpolicy_info     pol;
453         __u8                            hard;
454 };
455 
456 struct xfrm_usersa_flush {
457         __u8                            proto;
458 };
459 
460 struct xfrm_user_report {
461         __u8                            proto;
462         struct xfrm_selector            sel;
463 };
464 
465 /* Used by MIGRATE to pass addresses IKE should use to perform
466  * SA negotiation with the peer */
467 struct xfrm_user_kmaddress {
468         xfrm_address_t                  local;
469         xfrm_address_t                  remote;
470         __u32                           reserved;
471         __u16                           family;
472 };
473 
474 struct xfrm_user_migrate {
475         xfrm_address_t                  old_daddr;
476         xfrm_address_t                  old_saddr;
477         xfrm_address_t                  new_daddr;
478         xfrm_address_t                  new_saddr;
479         __u8                            proto;
480         __u8                            mode;
481         __u16                           reserved;
482         __u32                           reqid;
483         __u16                           old_family;
484         __u16                           new_family;
485 };
486 
487 struct xfrm_user_mapping {
488         struct xfrm_usersa_id           id;
489         __u32                           reqid;
490         xfrm_address_t                  old_saddr;
491         xfrm_address_t                  new_saddr;
492         __be16                          old_sport;
493         __be16                          new_sport;
494 };
495 
496 struct xfrm_address_filter {
497         xfrm_address_t                  saddr;
498         xfrm_address_t                  daddr;
499         __u16                           family;
500         __u8                            splen;
501         __u8                            dplen;
502 };
503 
504 struct xfrm_user_offload {
505         int                             ifindex;
506         __u8                            flags;
507 };
508 #define XFRM_OFFLOAD_IPV6       1
509 #define XFRM_OFFLOAD_INBOUND    2
510 
511 #ifndef __KERNEL__
512 /* backwards compatibility for userspace */
513 #define XFRMGRP_ACQUIRE         1
514 #define XFRMGRP_EXPIRE          2
515 #define XFRMGRP_SA              4
516 #define XFRMGRP_POLICY          8
517 #define XFRMGRP_REPORT          0x20
518 #endif
519 
520 enum xfrm_nlgroups {
521         XFRMNLGRP_NONE,
522 #define XFRMNLGRP_NONE          XFRMNLGRP_NONE
523         XFRMNLGRP_ACQUIRE,
524 #define XFRMNLGRP_ACQUIRE       XFRMNLGRP_ACQUIRE
525         XFRMNLGRP_EXPIRE,
526 #define XFRMNLGRP_EXPIRE        XFRMNLGRP_EXPIRE
527         XFRMNLGRP_SA,
528 #define XFRMNLGRP_SA            XFRMNLGRP_SA
529         XFRMNLGRP_POLICY,
530 #define XFRMNLGRP_POLICY        XFRMNLGRP_POLICY
531         XFRMNLGRP_AEVENTS,
532 #define XFRMNLGRP_AEVENTS       XFRMNLGRP_AEVENTS
533         XFRMNLGRP_REPORT,
534 #define XFRMNLGRP_REPORT        XFRMNLGRP_REPORT
535         XFRMNLGRP_MIGRATE,
536 #define XFRMNLGRP_MIGRATE       XFRMNLGRP_MIGRATE
537         XFRMNLGRP_MAPPING,
538 #define XFRMNLGRP_MAPPING       XFRMNLGRP_MAPPING
539         __XFRMNLGRP_MAX
540 };
541 #define XFRMNLGRP_MAX   (__XFRMNLGRP_MAX - 1)
542 
543 #endif /* _LINUX_XFRM_H */
544 

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