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 */ 16 typedef 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 */ 26 struct xfrm_id { 27 xfrm_address_t daddr; 28 __be32 spi; 29 __u8 proto; 30 }; 31 32 struct 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 50 struct 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 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; 76 }; 77 78 struct xfrm_lifetime_cur { 79 __u64 bytes; 80 __u64 packets; 81 __u64 add_time; 82 __u64 use_time; 83 }; 84 85 struct xfrm_replay_state { 86 __u32 oseq; 87 __u32 seq; 88 __u32 bitmap; 89 }; 90 91 #define XFRMA_REPLAY_ESN_MAX 4096 92 93 struct 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 }; 102 103 struct xfrm_algo { 104 char alg_name[64]; 105 unsigned int alg_key_len; /* in bits */ 106 char alg_key[]; 107 }; 108 109 struct 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 }; 115 116 struct 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 }; 122 123 struct xfrm_stats { 124 __u32 replay_window; 125 __u32 replay; 126 __u32 integrity_failed; 127 }; 128 129 enum { 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 }; 135 136 enum { 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 }; 143 144 enum { 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 */ 149 }; 150 151 #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 5 157 158 /* Netlink configuration messages. */ 159 enum { 160 XFRM_MSG_BASE = 0x10, 161 162 XFRM_MSG_NEWSA = 0x10, 163 #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA 164 XFRM_MSG_DELSA, 165 #define XFRM_MSG_DELSA XFRM_MSG_DELSA 166 XFRM_MSG_GETSA, 167 #define XFRM_MSG_GETSA XFRM_MSG_GETSA 168 169 XFRM_MSG_NEWPOLICY, 170 #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY 171 XFRM_MSG_DELPOLICY, 172 #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY 173 XFRM_MSG_GETPOLICY, 174 #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY 175 176 XFRM_MSG_ALLOCSPI, 177 #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI 178 XFRM_MSG_ACQUIRE, 179 #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE 180 XFRM_MSG_EXPIRE, 181 #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE 182 183 XFRM_MSG_UPDPOLICY, 184 #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY 185 XFRM_MSG_UPDSA, 186 #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA 187 188 XFRM_MSG_POLEXPIRE, 189 #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE 190 191 XFRM_MSG_FLUSHSA, 192 #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA 193 XFRM_MSG_FLUSHPOLICY, 194 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY 195 196 XFRM_MSG_NEWAE, 197 #define XFRM_MSG_NEWAE XFRM_MSG_NEWAE 198 XFRM_MSG_GETAE, 199 #define XFRM_MSG_GETAE XFRM_MSG_GETAE 200 201 XFRM_MSG_REPORT, 202 #define XFRM_MSG_REPORT XFRM_MSG_REPORT 203 204 XFRM_MSG_MIGRATE, 205 #define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE 206 207 XFRM_MSG_NEWSADINFO, 208 #define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO 209 XFRM_MSG_GETSADINFO, 210 #define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO 211 212 XFRM_MSG_NEWSPDINFO, 213 #define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO 214 XFRM_MSG_GETSPDINFO, 215 #define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO 216 217 XFRM_MSG_MAPPING, 218 #define XFRM_MSG_MAPPING XFRM_MSG_MAPPING 219 220 XFRM_MSG_SETDEFAULT, 221 #define XFRM_MSG_SETDEFAULT XFRM_MSG_SETDEFAULT 222 XFRM_MSG_GETDEFAULT, 223 #define XFRM_MSG_GETDEFAULT XFRM_MSG_GETDEFAULT 224 __XFRM_MSG_MAX 225 }; 226 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1) 227 228 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE) 229 230 /* 231 * Generic LSM security context for comunicating to user space 232 * NOTE: Same format as sadb_x_sec_ctx 233 */ 234 struct xfrm_user_sec_ctx { 235 __u16 len; 236 __u16 exttype; 237 __u8 ctx_alg; /* LSMs: e.g., selinux == 1 */ 238 __u8 ctx_doi; 239 __u16 ctx_len; 240 }; 241 242 struct xfrm_user_tmpl { 243 struct xfrm_id id; 244 __u16 family; 245 xfrm_address_t saddr; 246 __u32 reqid; 247 __u8 mode; 248 __u8 share; 249 __u8 optional; 250 __u32 aalgos; 251 __u32 ealgos; 252 __u32 calgos; 253 }; 254 255 struct xfrm_encap_tmpl { 256 __u16 encap_type; 257 __be16 encap_sport; 258 __be16 encap_dport; 259 xfrm_address_t encap_oa; 260 }; 261 262 /* AEVENT flags */ 263 enum xfrm_ae_ftype_t { 264 XFRM_AE_UNSPEC, 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 */ 272 __XFRM_AE_MAX 273 274 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1) 275 }; 276 277 struct xfrm_userpolicy_type { 278 __u8 type; 279 __u16 reserved1; 280 __u8 reserved2; 281 }; 282 283 /* Netlink message attributes. */ 284 enum xfrm_attr_type_t { 285 XFRMA_UNSPEC, 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 */ 294 XFRMA_LTIME_VAL, 295 XFRMA_REPLAY_VAL, 296 XFRMA_REPLAY_THRESH, 297 XFRMA_ETIMER_THRESH, 298 XFRMA_SRCADDR, /* xfrm_address_t */ 299 XFRMA_COADDR, /* xfrm_address_t */ 300 XFRMA_LASTUSED, /* __u64 */ 301 XFRMA_POLICY_TYPE, /* struct xfrm_userpolicy_type */ 302 XFRMA_MIGRATE, 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 */ 312 XFRMA_PAD, 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 */ 318 __XFRMA_MAX 319 320 #define XFRMA_OUTPUT_MARK XFRMA_SET_MARK /* Compatibility */ 321 #define XFRMA_MAX (__XFRMA_MAX - 1) 322 }; 323 324 struct xfrm_mark { 325 __u32 v; /* value */ 326 __u32 m; /* mask */ 327 }; 328 329 enum xfrm_sadattr_type_t { 330 XFRMA_SAD_UNSPEC, 331 XFRMA_SAD_CNT, 332 XFRMA_SAD_HINFO, 333 __XFRMA_SAD_MAX 334 335 #define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1) 336 }; 337 338 struct xfrmu_sadhinfo { 339 __u32 sadhcnt; /* current hash bkts */ 340 __u32 sadhmcnt; /* max allowed hash bkts */ 341 }; 342 343 enum xfrm_spdattr_type_t { 344 XFRMA_SPD_UNSPEC, 345 XFRMA_SPD_INFO, 346 XFRMA_SPD_HINFO, 347 XFRMA_SPD_IPV4_HTHRESH, 348 XFRMA_SPD_IPV6_HTHRESH, 349 __XFRMA_SPD_MAX 350 351 #define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1) 352 }; 353 354 struct xfrmu_spdinfo { 355 __u32 incnt; 356 __u32 outcnt; 357 __u32 fwdcnt; 358 __u32 inscnt; 359 __u32 outscnt; 360 __u32 fwdscnt; 361 }; 362 363 struct xfrmu_spdhinfo { 364 __u32 spdhcnt; 365 __u32 spdhmcnt; 366 }; 367 368 struct xfrmu_spdhthresh { 369 __u8 lbits; 370 __u8 rbits; 371 }; 372 373 struct xfrm_usersa_info { 374 struct xfrm_selector sel; 375 struct xfrm_id id; 376 xfrm_address_t saddr; 377 struct xfrm_lifetime_cfg lft; 378 struct xfrm_lifetime_cur curlft; 379 struct xfrm_stats stats; 380 __u32 seq; 381 __u32 reqid; 382 __u16 family; 383 __u8 mode; /* XFRM_MODE_xxx */ 384 __u8 replay_window; 385 __u8 flags; 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 128 394 }; 395 396 #define XFRM_SA_XFLAG_DONT_ENCAP_DSCP 1 397 #define XFRM_SA_XFLAG_OSEQ_MAY_WRAP 2 398 399 struct xfrm_usersa_id { 400 xfrm_address_t daddr; 401 __be32 spi; 402 __u16 family; 403 __u8 proto; 404 }; 405 406 struct xfrm_aevent_id { 407 struct xfrm_usersa_id sa_id; 408 xfrm_address_t saddr; 409 __u32 flags; 410 __u32 reqid; 411 }; 412 413 struct xfrm_userspi_info { 414 struct xfrm_usersa_info info; 415 __u32 min; 416 __u32 max; 417 }; 418 419 struct xfrm_userpolicy_info { 420 struct xfrm_selector sel; 421 struct xfrm_lifetime_cfg lft; 422 struct xfrm_lifetime_cur curlft; 423 __u32 priority; 424 __u32 index; 425 __u8 dir; 426 __u8 action; 427 #define XFRM_POLICY_ALLOW 0 428 #define XFRM_POLICY_BLOCK 1 429 __u8 flags; 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 2 433 __u8 share; 434 }; 435 436 struct xfrm_userpolicy_id { 437 struct xfrm_selector sel; 438 __u32 index; 439 __u8 dir; 440 }; 441 442 struct xfrm_user_acquire { 443 struct xfrm_id id; 444 xfrm_address_t saddr; 445 struct xfrm_selector sel; 446 struct xfrm_userpolicy_info policy; 447 __u32 aalgos; 448 __u32 ealgos; 449 __u32 calgos; 450 __u32 seq; 451 }; 452 453 struct xfrm_user_expire { 454 struct xfrm_usersa_info state; 455 __u8 hard; 456 }; 457 458 struct xfrm_user_polexpire { 459 struct xfrm_userpolicy_info pol; 460 __u8 hard; 461 }; 462 463 struct xfrm_usersa_flush { 464 __u8 proto; 465 }; 466 467 struct xfrm_user_report { 468 __u8 proto; 469 struct xfrm_selector sel; 470 }; 471 472 /* 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; 477 __u32 reserved; 478 __u16 family; 479 }; 480 481 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; 486 __u8 proto; 487 __u8 mode; 488 __u16 reserved; 489 __u32 reqid; 490 __u16 old_family; 491 __u16 new_family; 492 }; 493 494 struct xfrm_user_mapping { 495 struct xfrm_usersa_id id; 496 __u32 reqid; 497 xfrm_address_t old_saddr; 498 xfrm_address_t new_saddr; 499 __be16 old_sport; 500 __be16 new_sport; 501 }; 502 503 struct xfrm_address_filter { 504 xfrm_address_t saddr; 505 xfrm_address_t daddr; 506 __u16 family; 507 __u8 splen; 508 __u8 dplen; 509 }; 510 511 struct xfrm_user_offload { 512 int ifindex; 513 __u8 flags; 514 }; 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. 518 * 519 * So leave it here to make sure that it won't be reused by mistake. 520 */ 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. 525 * 526 * In policy offload mode, they are free and can be safely reused. 527 */ 528 #define XFRM_OFFLOAD_PACKET 4 529 530 struct xfrm_userpolicy_default { 531 #define XFRM_USERPOLICY_UNSPEC 0 532 #define XFRM_USERPOLICY_BLOCK 1 533 #define XFRM_USERPOLICY_ACCEPT 2 534 __u8 in; 535 __u8 fwd; 536 __u8 out; 537 }; 538 539 #ifndef __KERNEL__ 540 /* backwards compatibility for userspace */ 541 #define XFRMGRP_ACQUIRE 1 542 #define XFRMGRP_EXPIRE 2 543 #define XFRMGRP_SA 4 544 #define XFRMGRP_POLICY 8 545 #define XFRMGRP_REPORT 0x20 546 #endif 547 548 enum xfrm_nlgroups { 549 XFRMNLGRP_NONE, 550 #define XFRMNLGRP_NONE XFRMNLGRP_NONE 551 XFRMNLGRP_ACQUIRE, 552 #define XFRMNLGRP_ACQUIRE XFRMNLGRP_ACQUIRE 553 XFRMNLGRP_EXPIRE, 554 #define XFRMNLGRP_EXPIRE XFRMNLGRP_EXPIRE 555 XFRMNLGRP_SA, 556 #define XFRMNLGRP_SA XFRMNLGRP_SA 557 XFRMNLGRP_POLICY, 558 #define XFRMNLGRP_POLICY XFRMNLGRP_POLICY 559 XFRMNLGRP_AEVENTS, 560 #define XFRMNLGRP_AEVENTS XFRMNLGRP_AEVENTS 561 XFRMNLGRP_REPORT, 562 #define XFRMNLGRP_REPORT XFRMNLGRP_REPORT 563 XFRMNLGRP_MIGRATE, 564 #define XFRMNLGRP_MIGRATE XFRMNLGRP_MIGRATE 565 XFRMNLGRP_MAPPING, 566 #define XFRMNLGRP_MAPPING XFRMNLGRP_MAPPING 567 __XFRMNLGRP_MAX 568 }; 569 #define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1) 570 571 #endif /* _LINUX_XFRM_H */ 572