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_state_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 1 390 391 struct xfrm_usersa_id { 392 xfrm_address_t daddr; 393 __be32 spi; 394 __u16 family; 395 __u8 proto; 396 }; 397 398 struct xfrm_aevent_id { 399 struct xfrm_usersa_id sa_id; 400 xfrm_address_t saddr; 401 __u32 flags; 402 __u32 reqid; 403 }; 404 405 struct xfrm_userspi_info { 406 struct xfrm_usersa_info info; 407 __u32 min; 408 __u32 max; 409 }; 410 411 struct xfrm_userpolicy_info { 412 struct xfrm_selector sel; 413 struct xfrm_lifetime_cfg lft; 414 struct xfrm_lifetime_cur curlft; 415 __u32 priority; 416 __u32 index; 417 __u8 dir; 418 __u8 action; 419 #define XFRM_POLICY_ALLOW 0 420 #define XFRM_POLICY_BLOCK 1 421 __u8 flags; 422 #define XFRM_POLICY_LOCALOK 1 /* Allow user to override global policy */ 423 /* Automatically expand selector to include matching ICMP payloads. */ 424 #define XFRM_POLICY_ICMP 2 425 __u8 share; 426 }; 427 428 struct xfrm_userpolicy_id { 429 struct xfrm_selector sel; 430 __u32 index; 431 __u8 dir; 432 }; 433 434 struct xfrm_user_acquire { 435 struct xfrm_id id; 436 xfrm_address_t saddr; 437 struct xfrm_selector sel; 438 struct xfrm_userpolicy_info policy; 439 __u32 aalgos; 440 __u32 ealgos; 441 __u32 calgos; 442 __u32 seq; 443 }; 444 445 struct xfrm_user_expire { 446 struct xfrm_usersa_info state; 447 __u8 hard; 448 }; 449 450 struct xfrm_user_polexpire { 451 struct xfrm_userpolicy_info pol; 452 __u8 hard; 453 }; 454 455 struct xfrm_usersa_flush { 456 __u8 proto; 457 }; 458 459 struct xfrm_user_report { 460 __u8 proto; 461 struct xfrm_selector sel; 462 }; 463 464 /* Used by MIGRATE to pass addresses IKE should use to perform 465 * SA negotiation with the peer */ 466 struct xfrm_user_kmaddress { 467 xfrm_address_t local; 468 xfrm_address_t remote; 469 __u32 reserved; 470 __u16 family; 471 }; 472 473 struct xfrm_user_migrate { 474 xfrm_address_t old_daddr; 475 xfrm_address_t old_saddr; 476 xfrm_address_t new_daddr; 477 xfrm_address_t new_saddr; 478 __u8 proto; 479 __u8 mode; 480 __u16 reserved; 481 __u32 reqid; 482 __u16 old_family; 483 __u16 new_family; 484 }; 485 486 struct xfrm_user_mapping { 487 struct xfrm_usersa_id id; 488 __u32 reqid; 489 xfrm_address_t old_saddr; 490 xfrm_address_t new_saddr; 491 __be16 old_sport; 492 __be16 new_sport; 493 }; 494 495 struct xfrm_address_filter { 496 xfrm_address_t saddr; 497 xfrm_address_t daddr; 498 __u16 family; 499 __u8 splen; 500 __u8 dplen; 501 }; 502 503 struct xfrm_user_offload { 504 int ifindex; 505 __u8 flags; 506 }; 507 #define XFRM_OFFLOAD_IPV6 1 508 #define XFRM_OFFLOAD_INBOUND 2 509 510 #ifndef __KERNEL__ 511 /* backwards compatibility for userspace */ 512 #define XFRMGRP_ACQUIRE 1 513 #define XFRMGRP_EXPIRE 2 514 #define XFRMGRP_SA 4 515 #define XFRMGRP_POLICY 8 516 #define XFRMGRP_REPORT 0x20 517 #endif 518 519 enum xfrm_nlgroups { 520 XFRMNLGRP_NONE, 521 #define XFRMNLGRP_NONE XFRMNLGRP_NONE 522 XFRMNLGRP_ACQUIRE, 523 #define XFRMNLGRP_ACQUIRE XFRMNLGRP_ACQUIRE 524 XFRMNLGRP_EXPIRE, 525 #define XFRMNLGRP_EXPIRE XFRMNLGRP_EXPIRE 526 XFRMNLGRP_SA, 527 #define XFRMNLGRP_SA XFRMNLGRP_SA 528 XFRMNLGRP_POLICY, 529 #define XFRMNLGRP_POLICY XFRMNLGRP_POLICY 530 XFRMNLGRP_AEVENTS, 531 #define XFRMNLGRP_AEVENTS XFRMNLGRP_AEVENTS 532 XFRMNLGRP_REPORT, 533 #define XFRMNLGRP_REPORT XFRMNLGRP_REPORT 534 XFRMNLGRP_MIGRATE, 535 #define XFRMNLGRP_MIGRATE XFRMNLGRP_MIGRATE 536 XFRMNLGRP_MAPPING, 537 #define XFRMNLGRP_MAPPING XFRMNLGRP_MAPPING 538 __XFRMNLGRP_MAX 539 }; 540 #define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1) 541 542 #endif /* _LINUX_XFRM_H */ 543