1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
6 #include <linux/types.h>
7 #include <linux/stddef.h>
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.
13 /* Structure to encapsulate addresses. I do not want to use
14 * "standard" structure. My apologies.
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.
37 char ctx_str[] __counted_by(ctx_len);
40 /* Security Context Domains of Interpretation */
41 #define XFRM_SC_DOI_RESERVED 0
42 #define XFRM_SC_DOI_LSM 1
44 /* Security Context Algorithms */
45 #define XFRM_SC_ALG_RESERVED 0
46 #define XFRM_SC_ALG_SELINUX 1
48 /* Selector, used as selector both on policy rules (SPD) and SAs. */
50 struct xfrm_selector {
62 __kernel_uid32_t user;
65 #define XFRM_INF (~(__u64)0)
67 struct 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;
78 struct xfrm_lifetime_cur {
85 struct xfrm_replay_state {
91 #define XFRMA_REPLAY_ESN_MAX 4096
93 struct xfrm_replay_state_esn {
105 unsigned int alg_key_len; /* in bits */
109 struct xfrm_algo_auth {
111 unsigned int alg_key_len; /* in bits */
112 unsigned int alg_trunc_len; /* in bits */
116 struct xfrm_algo_aead {
118 unsigned int alg_key_len; /* in bits */
119 unsigned int alg_icv_len; /* in bits */
126 __u32 integrity_failed;
130 XFRM_POLICY_TYPE_MAIN = 0,
131 XFRM_POLICY_TYPE_SUB = 1,
132 XFRM_POLICY_TYPE_MAX = 2,
133 XFRM_POLICY_TYPE_ANY = 255
140 XFRM_POLICY_MASK = 3,
145 XFRM_SHARE_ANY, /* No limitations */
146 XFRM_SHARE_SESSION, /* For this session only */
147 XFRM_SHARE_USER, /* For this user only */
148 XFRM_SHARE_UNIQUE /* Use once */
151 #define XFRM_MODE_TRANSPORT 0
152 #define XFRM_MODE_TUNNEL 1
153 #define XFRM_MODE_ROUTEOPTIMIZATION 2
154 #define XFRM_MODE_IN_TRIGGER 3
155 #define XFRM_MODE_BEET 4
156 #define XFRM_MODE_MAX 5
158 /* Netlink configuration messages. */
160 XFRM_MSG_BASE = 0x10,
162 XFRM_MSG_NEWSA = 0x10,
163 #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA
165 #define XFRM_MSG_DELSA XFRM_MSG_DELSA
167 #define XFRM_MSG_GETSA XFRM_MSG_GETSA
170 #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY
172 #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY
174 #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY
177 #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI
179 #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE
181 #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE
184 #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY
186 #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA
189 #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE
192 #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA
193 XFRM_MSG_FLUSHPOLICY,
194 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
197 #define XFRM_MSG_NEWAE XFRM_MSG_NEWAE
199 #define XFRM_MSG_GETAE XFRM_MSG_GETAE
202 #define XFRM_MSG_REPORT XFRM_MSG_REPORT
205 #define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE
208 #define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO
210 #define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO
213 #define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO
215 #define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO
218 #define XFRM_MSG_MAPPING XFRM_MSG_MAPPING
221 #define XFRM_MSG_SETDEFAULT XFRM_MSG_SETDEFAULT
223 #define XFRM_MSG_GETDEFAULT XFRM_MSG_GETDEFAULT
226 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
228 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
231 * Generic LSM security context for communicating to user space
232 * NOTE: Same format as sadb_x_sec_ctx
234 struct xfrm_user_sec_ctx {
237 __u8 ctx_alg; /* LSMs: e.g., selinux == 1 */
242 struct xfrm_user_tmpl {
245 xfrm_address_t saddr;
255 struct xfrm_encap_tmpl {
259 xfrm_address_t encap_oa;
263 enum xfrm_ae_ftype_t {
265 XFRM_AE_RTHR=1, /* replay threshold*/
266 XFRM_AE_RVAL=2, /* replay value */
267 XFRM_AE_LVAL=4, /* lifetime value */
268 XFRM_AE_ETHR=8, /* expiry timer threshold */
269 XFRM_AE_CR=16, /* Event cause is replay update */
270 XFRM_AE_CE=32, /* Event cause is timer expiry */
271 XFRM_AE_CU=64, /* Event cause is policy update */
274 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1)
277 struct xfrm_userpolicy_type {
283 /* Netlink message attributes. */
284 enum xfrm_attr_type_t {
286 XFRMA_ALG_AUTH, /* struct xfrm_algo */
287 XFRMA_ALG_CRYPT, /* struct xfrm_algo */
288 XFRMA_ALG_COMP, /* struct xfrm_algo */
289 XFRMA_ENCAP, /* struct xfrm_algo + struct xfrm_encap_tmpl */
290 XFRMA_TMPL, /* 1 or more struct xfrm_user_tmpl */
291 XFRMA_SA, /* struct xfrm_usersa_info */
292 XFRMA_POLICY, /*struct xfrm_userpolicy_info */
293 XFRMA_SEC_CTX, /* struct xfrm_sec_ctx */
298 XFRMA_SRCADDR, /* xfrm_address_t */
299 XFRMA_COADDR, /* xfrm_address_t */
300 XFRMA_LASTUSED, /* __u64 */
301 XFRMA_POLICY_TYPE, /* struct xfrm_userpolicy_type */
303 XFRMA_ALG_AEAD, /* struct xfrm_algo_aead */
304 XFRMA_KMADDRESS, /* struct xfrm_user_kmaddress */
305 XFRMA_ALG_AUTH_TRUNC, /* struct xfrm_algo_auth */
306 XFRMA_MARK, /* struct xfrm_mark */
307 XFRMA_TFCPAD, /* __u32 */
308 XFRMA_REPLAY_ESN_VAL, /* struct xfrm_replay_state_esn */
309 XFRMA_SA_EXTRA_FLAGS, /* __u32 */
310 XFRMA_PROTO, /* __u8 */
311 XFRMA_ADDRESS_FILTER, /* struct xfrm_address_filter */
313 XFRMA_OFFLOAD_DEV, /* struct xfrm_user_offload */
314 XFRMA_SET_MARK, /* __u32 */
315 XFRMA_SET_MARK_MASK, /* __u32 */
316 XFRMA_IF_ID, /* __u32 */
317 XFRMA_MTIMER_THRESH, /* __u32 in seconds for input SA */
320 #define XFRMA_OUTPUT_MARK XFRMA_SET_MARK /* Compatibility */
321 #define XFRMA_MAX (__XFRMA_MAX - 1)
329 enum xfrm_sadattr_type_t {
335 #define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1)
338 struct xfrmu_sadhinfo {
339 __u32 sadhcnt; /* current hash bkts */
340 __u32 sadhmcnt; /* max allowed hash bkts */
343 enum xfrm_spdattr_type_t {
347 XFRMA_SPD_IPV4_HTHRESH,
348 XFRMA_SPD_IPV6_HTHRESH,
351 #define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1)
354 struct xfrmu_spdinfo {
363 struct xfrmu_spdhinfo {
368 struct xfrmu_spdhthresh {
373 struct xfrm_usersa_info {
374 struct xfrm_selector sel;
376 xfrm_address_t saddr;
377 struct xfrm_lifetime_cfg lft;
378 struct xfrm_lifetime_cur curlft;
379 struct xfrm_stats stats;
383 __u8 mode; /* XFRM_MODE_xxx */
386 #define XFRM_STATE_NOECN 1
387 #define XFRM_STATE_DECAP_DSCP 2
388 #define XFRM_STATE_NOPMTUDISC 4
389 #define XFRM_STATE_WILDRECV 8
390 #define XFRM_STATE_ICMP 16
391 #define XFRM_STATE_AF_UNSPEC 32
392 #define XFRM_STATE_ALIGN4 64
393 #define XFRM_STATE_ESN 128
396 #define XFRM_SA_XFLAG_DONT_ENCAP_DSCP 1
397 #define XFRM_SA_XFLAG_OSEQ_MAY_WRAP 2
399 struct xfrm_usersa_id {
400 xfrm_address_t daddr;
406 struct xfrm_aevent_id {
407 struct xfrm_usersa_id sa_id;
408 xfrm_address_t saddr;
413 struct xfrm_userspi_info {
414 struct xfrm_usersa_info info;
419 struct xfrm_userpolicy_info {
420 struct xfrm_selector sel;
421 struct xfrm_lifetime_cfg lft;
422 struct xfrm_lifetime_cur curlft;
427 #define XFRM_POLICY_ALLOW 0
428 #define XFRM_POLICY_BLOCK 1
430 #define XFRM_POLICY_LOCALOK 1 /* Allow user to override global policy */
431 /* Automatically expand selector to include matching ICMP payloads. */
432 #define XFRM_POLICY_ICMP 2
436 struct xfrm_userpolicy_id {
437 struct xfrm_selector sel;
442 struct xfrm_user_acquire {
444 xfrm_address_t saddr;
445 struct xfrm_selector sel;
446 struct xfrm_userpolicy_info policy;
453 struct xfrm_user_expire {
454 struct xfrm_usersa_info state;
458 struct xfrm_user_polexpire {
459 struct xfrm_userpolicy_info pol;
463 struct xfrm_usersa_flush {
467 struct xfrm_user_report {
469 struct xfrm_selector sel;
472 /* Used by MIGRATE to pass addresses IKE should use to perform
473 * SA negotiation with the peer */
474 struct xfrm_user_kmaddress {
475 xfrm_address_t local;
476 xfrm_address_t remote;
481 struct xfrm_user_migrate {
482 xfrm_address_t old_daddr;
483 xfrm_address_t old_saddr;
484 xfrm_address_t new_daddr;
485 xfrm_address_t new_saddr;
494 struct xfrm_user_mapping {
495 struct xfrm_usersa_id id;
497 xfrm_address_t old_saddr;
498 xfrm_address_t new_saddr;
503 struct xfrm_address_filter {
504 xfrm_address_t saddr;
505 xfrm_address_t daddr;
511 struct xfrm_user_offload {
515 /* This flag was exposed without any kernel code that supports it.
516 * Unfortunately, strongswan has the code that sets this flag,
517 * which makes it impossible to reuse this bit.
519 * So leave it here to make sure that it won't be reused by mistake.
521 #define XFRM_OFFLOAD_IPV6 1
522 #define XFRM_OFFLOAD_INBOUND 2
523 /* Two bits above are relevant for state path only, while
524 * offload is used for both policy and state flows.
526 * In policy offload mode, they are free and can be safely reused.
528 #define XFRM_OFFLOAD_PACKET 4
530 struct xfrm_userpolicy_default {
531 #define XFRM_USERPOLICY_UNSPEC 0
532 #define XFRM_USERPOLICY_BLOCK 1
533 #define XFRM_USERPOLICY_ACCEPT 2
540 /* backwards compatibility for userspace */
541 #define XFRMGRP_ACQUIRE 1
542 #define XFRMGRP_EXPIRE 2
544 #define XFRMGRP_POLICY 8
545 #define XFRMGRP_REPORT 0x20
550 #define XFRMNLGRP_NONE XFRMNLGRP_NONE
552 #define XFRMNLGRP_ACQUIRE XFRMNLGRP_ACQUIRE
554 #define XFRMNLGRP_EXPIRE XFRMNLGRP_EXPIRE
556 #define XFRMNLGRP_SA XFRMNLGRP_SA
558 #define XFRMNLGRP_POLICY XFRMNLGRP_POLICY
560 #define XFRMNLGRP_AEVENTS XFRMNLGRP_AEVENTS
562 #define XFRMNLGRP_REPORT XFRMNLGRP_REPORT
564 #define XFRMNLGRP_MIGRATE XFRMNLGRP_MIGRATE
566 #define XFRMNLGRP_MAPPING XFRMNLGRP_MAPPING
569 #define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1)
571 #endif /* _LINUX_XFRM_H */