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,
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 */
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
163 /* Netlink configuration messages. */
165 XFRM_MSG_BASE = 0x10,
167 XFRM_MSG_NEWSA = 0x10,
168 #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA
170 #define XFRM_MSG_DELSA XFRM_MSG_DELSA
172 #define XFRM_MSG_GETSA XFRM_MSG_GETSA
175 #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY
177 #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY
179 #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY
182 #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI
184 #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE
186 #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE
189 #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY
191 #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA
194 #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE
197 #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA
198 XFRM_MSG_FLUSHPOLICY,
199 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
202 #define XFRM_MSG_NEWAE XFRM_MSG_NEWAE
204 #define XFRM_MSG_GETAE XFRM_MSG_GETAE
207 #define XFRM_MSG_REPORT XFRM_MSG_REPORT
210 #define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE
213 #define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO
215 #define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO
218 #define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO
220 #define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO
223 #define XFRM_MSG_MAPPING XFRM_MSG_MAPPING
226 #define XFRM_MSG_SETDEFAULT XFRM_MSG_SETDEFAULT
228 #define XFRM_MSG_GETDEFAULT XFRM_MSG_GETDEFAULT
231 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
233 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
236 * Generic LSM security context for communicating to user space
237 * NOTE: Same format as sadb_x_sec_ctx
239 struct xfrm_user_sec_ctx {
242 __u8 ctx_alg; /* LSMs: e.g., selinux == 1 */
247 struct xfrm_user_tmpl {
250 xfrm_address_t saddr;
260 struct xfrm_encap_tmpl {
264 xfrm_address_t encap_oa;
268 enum xfrm_ae_ftype_t {
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 */
279 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1)
282 struct xfrm_userpolicy_type {
288 /* Netlink message attributes. */
289 enum xfrm_attr_type_t {
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 */
303 XFRMA_SRCADDR, /* xfrm_address_t */
304 XFRMA_COADDR, /* xfrm_address_t */
305 XFRMA_LASTUSED, /* __u64 */
306 XFRMA_POLICY_TYPE, /* struct xfrm_userpolicy_type */
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 */
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_NAT_KEEPALIVE_INTERVAL, /* __u32 in seconds for NAT keepalive */
327 #define XFRMA_OUTPUT_MARK XFRMA_SET_MARK /* Compatibility */
328 #define XFRMA_MAX (__XFRMA_MAX - 1)
336 enum xfrm_sadattr_type_t {
342 #define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1)
345 struct xfrmu_sadhinfo {
346 __u32 sadhcnt; /* current hash bkts */
347 __u32 sadhmcnt; /* max allowed hash bkts */
350 enum xfrm_spdattr_type_t {
354 XFRMA_SPD_IPV4_HTHRESH,
355 XFRMA_SPD_IPV6_HTHRESH,
358 #define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1)
361 struct xfrmu_spdinfo {
370 struct xfrmu_spdhinfo {
375 struct xfrmu_spdhthresh {
380 struct xfrm_usersa_info {
381 struct xfrm_selector sel;
383 xfrm_address_t saddr;
384 struct xfrm_lifetime_cfg lft;
385 struct xfrm_lifetime_cur curlft;
386 struct xfrm_stats stats;
390 __u8 mode; /* XFRM_MODE_xxx */
393 #define XFRM_STATE_NOECN 1
394 #define XFRM_STATE_DECAP_DSCP 2
395 #define XFRM_STATE_NOPMTUDISC 4
396 #define XFRM_STATE_WILDRECV 8
397 #define XFRM_STATE_ICMP 16
398 #define XFRM_STATE_AF_UNSPEC 32
399 #define XFRM_STATE_ALIGN4 64
400 #define XFRM_STATE_ESN 128
403 #define XFRM_SA_XFLAG_DONT_ENCAP_DSCP 1
404 #define XFRM_SA_XFLAG_OSEQ_MAY_WRAP 2
406 struct xfrm_usersa_id {
407 xfrm_address_t daddr;
413 struct xfrm_aevent_id {
414 struct xfrm_usersa_id sa_id;
415 xfrm_address_t saddr;
420 struct xfrm_userspi_info {
421 struct xfrm_usersa_info info;
426 struct xfrm_userpolicy_info {
427 struct xfrm_selector sel;
428 struct xfrm_lifetime_cfg lft;
429 struct xfrm_lifetime_cur curlft;
434 #define XFRM_POLICY_ALLOW 0
435 #define XFRM_POLICY_BLOCK 1
437 #define XFRM_POLICY_LOCALOK 1 /* Allow user to override global policy */
438 /* Automatically expand selector to include matching ICMP payloads. */
439 #define XFRM_POLICY_ICMP 2
443 struct xfrm_userpolicy_id {
444 struct xfrm_selector sel;
449 struct xfrm_user_acquire {
451 xfrm_address_t saddr;
452 struct xfrm_selector sel;
453 struct xfrm_userpolicy_info policy;
460 struct xfrm_user_expire {
461 struct xfrm_usersa_info state;
465 struct xfrm_user_polexpire {
466 struct xfrm_userpolicy_info pol;
470 struct xfrm_usersa_flush {
474 struct xfrm_user_report {
476 struct xfrm_selector sel;
479 /* Used by MIGRATE to pass addresses IKE should use to perform
480 * SA negotiation with the peer */
481 struct xfrm_user_kmaddress {
482 xfrm_address_t local;
483 xfrm_address_t remote;
488 struct xfrm_user_migrate {
489 xfrm_address_t old_daddr;
490 xfrm_address_t old_saddr;
491 xfrm_address_t new_daddr;
492 xfrm_address_t new_saddr;
501 struct xfrm_user_mapping {
502 struct xfrm_usersa_id id;
504 xfrm_address_t old_saddr;
505 xfrm_address_t new_saddr;
510 struct xfrm_address_filter {
511 xfrm_address_t saddr;
512 xfrm_address_t daddr;
518 struct xfrm_user_offload {
522 /* This flag was exposed without any kernel code that supports it.
523 * Unfortunately, strongswan has the code that sets this flag,
524 * which makes it impossible to reuse this bit.
526 * So leave it here to make sure that it won't be reused by mistake.
528 #define XFRM_OFFLOAD_IPV6 1
529 #define XFRM_OFFLOAD_INBOUND 2
530 /* Two bits above are relevant for state path only, while
531 * offload is used for both policy and state flows.
533 * In policy offload mode, they are free and can be safely reused.
535 #define XFRM_OFFLOAD_PACKET 4
537 struct xfrm_userpolicy_default {
538 #define XFRM_USERPOLICY_UNSPEC 0
539 #define XFRM_USERPOLICY_BLOCK 1
540 #define XFRM_USERPOLICY_ACCEPT 2
547 /* backwards compatibility for userspace */
548 #define XFRMGRP_ACQUIRE 1
549 #define XFRMGRP_EXPIRE 2
551 #define XFRMGRP_POLICY 8
552 #define XFRMGRP_REPORT 0x20
557 #define XFRMNLGRP_NONE XFRMNLGRP_NONE
559 #define XFRMNLGRP_ACQUIRE XFRMNLGRP_ACQUIRE
561 #define XFRMNLGRP_EXPIRE XFRMNLGRP_EXPIRE
563 #define XFRMNLGRP_SA XFRMNLGRP_SA
565 #define XFRMNLGRP_POLICY XFRMNLGRP_POLICY
567 #define XFRMNLGRP_AEVENTS XFRMNLGRP_AEVENTS
569 #define XFRMNLGRP_REPORT XFRMNLGRP_REPORT
571 #define XFRMNLGRP_MIGRATE XFRMNLGRP_MIGRATE
573 #define XFRMNLGRP_MAPPING XFRMNLGRP_MAPPING
576 #define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1)
578 #endif /* _LINUX_XFRM_H */