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 xfrm_sa_dir { 145 XFRM_SA_DIR_IN = 1, 146 XFRM_SA_DIR_OUT = 2 147 }; 148 149 enum { 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 */ 154 }; 155 156 #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 5 162 163 /* Netlink configuration messages. */ 164 enum { 165 XFRM_MSG_BASE = 0x10, 166 167 XFRM_MSG_NEWSA = 0x10, 168 #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA 169 XFRM_MSG_DELSA, 170 #define XFRM_MSG_DELSA XFRM_MSG_DELSA 171 XFRM_MSG_GETSA, 172 #define XFRM_MSG_GETSA XFRM_MSG_GETSA 173 174 XFRM_MSG_NEWPOLICY, 175 #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY 176 XFRM_MSG_DELPOLICY, 177 #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY 178 XFRM_MSG_GETPOLICY, 179 #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY 180 181 XFRM_MSG_ALLOCSPI, 182 #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI 183 XFRM_MSG_ACQUIRE, 184 #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE 185 XFRM_MSG_EXPIRE, 186 #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE 187 188 XFRM_MSG_UPDPOLICY, 189 #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY 190 XFRM_MSG_UPDSA, 191 #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA 192 193 XFRM_MSG_POLEXPIRE, 194 #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE 195 196 XFRM_MSG_FLUSHSA, 197 #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA 198 XFRM_MSG_FLUSHPOLICY, 199 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY 200 201 XFRM_MSG_NEWAE, 202 #define XFRM_MSG_NEWAE XFRM_MSG_NEWAE 203 XFRM_MSG_GETAE, 204 #define XFRM_MSG_GETAE XFRM_MSG_GETAE 205 206 XFRM_MSG_REPORT, 207 #define XFRM_MSG_REPORT XFRM_MSG_REPORT 208 209 XFRM_MSG_MIGRATE, 210 #define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE 211 212 XFRM_MSG_NEWSADINFO, 213 #define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO 214 XFRM_MSG_GETSADINFO, 215 #define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO 216 217 XFRM_MSG_NEWSPDINFO, 218 #define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO 219 XFRM_MSG_GETSPDINFO, 220 #define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO 221 222 XFRM_MSG_MAPPING, 223 #define XFRM_MSG_MAPPING XFRM_MSG_MAPPING 224 225 XFRM_MSG_SETDEFAULT, 226 #define XFRM_MSG_SETDEFAULT XFRM_MSG_SETDEFAULT 227 XFRM_MSG_GETDEFAULT, 228 #define XFRM_MSG_GETDEFAULT XFRM_MSG_GETDEFAULT 229 __XFRM_MSG_MAX 230 }; 231 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1) 232 233 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE) 234 235 /* 236 * Generic LSM security context for communicating to user space 237 * NOTE: Same format as sadb_x_sec_ctx 238 */ 239 struct xfrm_user_sec_ctx { 240 __u16 len; 241 __u16 exttype; 242 __u8 ctx_alg; /* LSMs: e.g., selinux == 1 */ 243 __u8 ctx_doi; 244 __u16 ctx_len; 245 }; 246 247 struct xfrm_user_tmpl { 248 struct xfrm_id id; 249 __u16 family; 250 xfrm_address_t saddr; 251 __u32 reqid; 252 __u8 mode; 253 __u8 share; 254 __u8 optional; 255 __u32 aalgos; 256 __u32 ealgos; 257 __u32 calgos; 258 }; 259 260 struct xfrm_encap_tmpl { 261 __u16 encap_type; 262 __be16 encap_sport; 263 __be16 encap_dport; 264 xfrm_address_t encap_oa; 265 }; 266 267 /* AEVENT flags */ 268 enum xfrm_ae_ftype_t { 269 XFRM_AE_UNSPEC, 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 */ 277 __XFRM_AE_MAX 278 279 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1) 280 }; 281 282 struct xfrm_userpolicy_type { 283 __u8 type; 284 __u16 reserved1; 285 __u8 reserved2; 286 }; 287 288 /* Netlink message attributes. */ 289 enum xfrm_attr_type_t { 290 XFRMA_UNSPEC, 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 */ 299 XFRMA_LTIME_VAL, 300 XFRMA_REPLAY_VAL, 301 XFRMA_REPLAY_THRESH, 302 XFRMA_ETIMER_THRESH, 303 XFRMA_SRCADDR, /* xfrm_address_t */ 304 XFRMA_COADDR, /* xfrm_address_t */ 305 XFRMA_LASTUSED, /* __u64 */ 306 XFRMA_POLICY_TYPE, /* struct xfrm_userpolicy_type */ 307 XFRMA_MIGRATE, 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 */ 317 XFRMA_PAD, 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 */ 325 __XFRMA_MAX 326 327 #define XFRMA_OUTPUT_MARK XFRMA_SET_MARK /* Compatibility */ 328 #define XFRMA_MAX (__XFRMA_MAX - 1) 329 }; 330 331 struct xfrm_mark { 332 __u32 v; /* value */ 333 __u32 m; /* mask */ 334 }; 335 336 enum xfrm_sadattr_type_t { 337 XFRMA_SAD_UNSPEC, 338 XFRMA_SAD_CNT, 339 XFRMA_SAD_HINFO, 340 __XFRMA_SAD_MAX 341 342 #define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1) 343 }; 344 345 struct xfrmu_sadhinfo { 346 __u32 sadhcnt; /* current hash bkts */ 347 __u32 sadhmcnt; /* max allowed hash bkts */ 348 }; 349 350 enum xfrm_spdattr_type_t { 351 XFRMA_SPD_UNSPEC, 352 XFRMA_SPD_INFO, 353 XFRMA_SPD_HINFO, 354 XFRMA_SPD_IPV4_HTHRESH, 355 XFRMA_SPD_IPV6_HTHRESH, 356 __XFRMA_SPD_MAX 357 358 #define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1) 359 }; 360 361 struct xfrmu_spdinfo { 362 __u32 incnt; 363 __u32 outcnt; 364 __u32 fwdcnt; 365 __u32 inscnt; 366 __u32 outscnt; 367 __u32 fwdscnt; 368 }; 369 370 struct xfrmu_spdhinfo { 371 __u32 spdhcnt; 372 __u32 spdhmcnt; 373 }; 374 375 struct xfrmu_spdhthresh { 376 __u8 lbits; 377 __u8 rbits; 378 }; 379 380 struct xfrm_usersa_info { 381 struct xfrm_selector sel; 382 struct xfrm_id id; 383 xfrm_address_t saddr; 384 struct xfrm_lifetime_cfg lft; 385 struct xfrm_lifetime_cur curlft; 386 struct xfrm_stats stats; 387 __u32 seq; 388 __u32 reqid; 389 __u16 family; 390 __u8 mode; /* XFRM_MODE_xxx */ 391 __u8 replay_window; 392 __u8 flags; 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 128 401 }; 402 403 #define XFRM_SA_XFLAG_DONT_ENCAP_DSCP 1 404 #define XFRM_SA_XFLAG_OSEQ_MAY_WRAP 2 405 406 struct xfrm_usersa_id { 407 xfrm_address_t daddr; 408 __be32 spi; 409 __u16 family; 410 __u8 proto; 411 }; 412 413 struct xfrm_aevent_id { 414 struct xfrm_usersa_id sa_id; 415 xfrm_address_t saddr; 416 __u32 flags; 417 __u32 reqid; 418 }; 419 420 struct xfrm_userspi_info { 421 struct xfrm_usersa_info info; 422 __u32 min; 423 __u32 max; 424 }; 425 426 struct xfrm_userpolicy_info { 427 struct xfrm_selector sel; 428 struct xfrm_lifetime_cfg lft; 429 struct xfrm_lifetime_cur curlft; 430 __u32 priority; 431 __u32 index; 432 __u8 dir; 433 __u8 action; 434 #define XFRM_POLICY_ALLOW 0 435 #define XFRM_POLICY_BLOCK 1 436 __u8 flags; 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 2 440 __u8 share; 441 }; 442 443 struct xfrm_userpolicy_id { 444 struct xfrm_selector sel; 445 __u32 index; 446 __u8 dir; 447 }; 448 449 struct xfrm_user_acquire { 450 struct xfrm_id id; 451 xfrm_address_t saddr; 452 struct xfrm_selector sel; 453 struct xfrm_userpolicy_info policy; 454 __u32 aalgos; 455 __u32 ealgos; 456 __u32 calgos; 457 __u32 seq; 458 }; 459 460 struct xfrm_user_expire { 461 struct xfrm_usersa_info state; 462 __u8 hard; 463 }; 464 465 struct xfrm_user_polexpire { 466 struct xfrm_userpolicy_info pol; 467 __u8 hard; 468 }; 469 470 struct xfrm_usersa_flush { 471 __u8 proto; 472 }; 473 474 struct xfrm_user_report { 475 __u8 proto; 476 struct xfrm_selector sel; 477 }; 478 479 /* 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; 484 __u32 reserved; 485 __u16 family; 486 }; 487 488 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; 493 __u8 proto; 494 __u8 mode; 495 __u16 reserved; 496 __u32 reqid; 497 __u16 old_family; 498 __u16 new_family; 499 }; 500 501 struct xfrm_user_mapping { 502 struct xfrm_usersa_id id; 503 __u32 reqid; 504 xfrm_address_t old_saddr; 505 xfrm_address_t new_saddr; 506 __be16 old_sport; 507 __be16 new_sport; 508 }; 509 510 struct xfrm_address_filter { 511 xfrm_address_t saddr; 512 xfrm_address_t daddr; 513 __u16 family; 514 __u8 splen; 515 __u8 dplen; 516 }; 517 518 struct xfrm_user_offload { 519 int ifindex; 520 __u8 flags; 521 }; 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. 525 * 526 * So leave it here to make sure that it won't be reused by mistake. 527 */ 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. 532 * 533 * In policy offload mode, they are free and can be safely reused. 534 */ 535 #define XFRM_OFFLOAD_PACKET 4 536 537 struct xfrm_userpolicy_default { 538 #define XFRM_USERPOLICY_UNSPEC 0 539 #define XFRM_USERPOLICY_BLOCK 1 540 #define XFRM_USERPOLICY_ACCEPT 2 541 __u8 in; 542 __u8 fwd; 543 __u8 out; 544 }; 545 546 #ifndef __KERNEL__ 547 /* backwards compatibility for userspace */ 548 #define XFRMGRP_ACQUIRE 1 549 #define XFRMGRP_EXPIRE 2 550 #define XFRMGRP_SA 4 551 #define XFRMGRP_POLICY 8 552 #define XFRMGRP_REPORT 0x20 553 #endif 554 555 enum xfrm_nlgroups { 556 XFRMNLGRP_NONE, 557 #define XFRMNLGRP_NONE XFRMNLGRP_NONE 558 XFRMNLGRP_ACQUIRE, 559 #define XFRMNLGRP_ACQUIRE XFRMNLGRP_ACQUIRE 560 XFRMNLGRP_EXPIRE, 561 #define XFRMNLGRP_EXPIRE XFRMNLGRP_EXPIRE 562 XFRMNLGRP_SA, 563 #define XFRMNLGRP_SA XFRMNLGRP_SA 564 XFRMNLGRP_POLICY, 565 #define XFRMNLGRP_POLICY XFRMNLGRP_POLICY 566 XFRMNLGRP_AEVENTS, 567 #define XFRMNLGRP_AEVENTS XFRMNLGRP_AEVENTS 568 XFRMNLGRP_REPORT, 569 #define XFRMNLGRP_REPORT XFRMNLGRP_REPORT 570 XFRMNLGRP_MIGRATE, 571 #define XFRMNLGRP_MIGRATE XFRMNLGRP_MIGRATE 572 XFRMNLGRP_MAPPING, 573 #define XFRMNLGRP_MAPPING XFRMNLGRP_MAPPING 574 __XFRMNLGRP_MAX 575 }; 576 #define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1) 577 578 #endif /* _LINUX_XFRM_H */ 579