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 uint32_t a4; 17 uint32_t 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 uint32_t spi; 28 uint8_t proto; 29 }; 30 31 struct xfrm_sec_ctx { 32 uint8_t ctx_doi; 33 uint8_t ctx_alg; 34 uint16_t ctx_len; 35 uint32_t 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 uint16_t dport; 53 uint16_t dport_mask; 54 uint16_t sport; 55 uint16_t sport_mask; 56 uint16_t family; 57 uint8_t prefixlen_d; 58 uint8_t prefixlen_s; 59 uint8_t proto; 60 int ifindex; 61 __kernel_uid32_t user; 62 }; 63 64 #define XFRM_INF (~(uint64_t)0) 65 66 struct xfrm_lifetime_cfg { 67 uint64_t soft_byte_limit; 68 uint64_t hard_byte_limit; 69 uint64_t soft_packet_limit; 70 uint64_t hard_packet_limit; 71 uint64_t soft_add_expires_seconds; 72 uint64_t hard_add_expires_seconds; 73 uint64_t soft_use_expires_seconds; 74 uint64_t hard_use_expires_seconds; 75 }; 76 77 struct xfrm_lifetime_cur { 78 uint64_t bytes; 79 uint64_t packets; 80 uint64_t add_time; 81 uint64_t use_time; 82 }; 83 84 struct xfrm_replay_state { 85 uint32_t oseq; 86 uint32_t seq; 87 uint32_t bitmap; 88 }; 89 90 #define XFRMA_REPLAY_ESN_MAX 4096 91 92 struct xfrm_replay_state_esn { 93 unsigned int bmp_len; 94 uint32_t oseq; 95 uint32_t seq; 96 uint32_t oseq_hi; 97 uint32_t seq_hi; 98 uint32_t replay_window; 99 uint32_t 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 uint32_t replay_window; 124 uint32_t replay; 125 uint32_t 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 uint16_t len; 230 uint16_t exttype; 231 uint8_t ctx_alg; /* LSMs: e.g., selinux == 1 */ 232 uint8_t ctx_doi; 233 uint16_t ctx_len; 234 }; 235 236 struct xfrm_user_tmpl { 237 struct xfrm_id id; 238 uint16_t family; 239 xfrm_address_t saddr; 240 uint32_t reqid; 241 uint8_t mode; 242 uint8_t share; 243 uint8_t optional; 244 uint32_t aalgos; 245 uint32_t ealgos; 246 uint32_t calgos; 247 }; 248 249 struct xfrm_encap_tmpl { 250 uint16_t encap_type; 251 uint16_t encap_sport; 252 uint16_t 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 uint8_t type; 273 uint16_t reserved1; 274 uint8_t 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, /* uint32_t */ 302 XFRMA_REPLAY_ESN_VAL, /* struct xfrm_replay_state_esn */ 303 XFRMA_SA_EXTRA_FLAGS, /* uint32_t */ 304 XFRMA_PROTO, /* uint8_t */ 305 XFRMA_ADDRESS_FILTER, /* struct xfrm_address_filter */ 306 XFRMA_PAD, 307 XFRMA_OFFLOAD_DEV, /* struct xfrm_user_offload */ 308 XFRMA_SET_MARK, /* uint32_t */ 309 XFRMA_SET_MARK_MASK, /* uint32_t */ 310 XFRMA_IF_ID, /* uint32_t */ 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 uint32_t v; /* value */ 319 uint32_t 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 uint32_t sadhcnt; /* current hash bkts */ 333 uint32_t 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 uint32_t incnt; 349 uint32_t outcnt; 350 uint32_t fwdcnt; 351 uint32_t inscnt; 352 uint32_t outscnt; 353 uint32_t fwdscnt; 354 }; 355 356 struct xfrmu_spdhinfo { 357 uint32_t spdhcnt; 358 uint32_t spdhmcnt; 359 }; 360 361 struct xfrmu_spdhthresh { 362 uint8_t lbits; 363 uint8_t 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 uint32_t seq; 374 uint32_t reqid; 375 uint16_t family; 376 uint8_t mode; /* XFRM_MODE_xxx */ 377 uint8_t replay_window; 378 uint8_t 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 #define XFRM_SA_XFLAG_OSEQ_MAY_WRAP 2 391 392 struct xfrm_usersa_id { 393 xfrm_address_t daddr; 394 uint32_t spi; 395 uint16_t family; 396 uint8_t proto; 397 }; 398 399 struct xfrm_aevent_id { 400 struct xfrm_usersa_id sa_id; 401 xfrm_address_t saddr; 402 uint32_t flags; 403 uint32_t reqid; 404 }; 405 406 struct xfrm_userspi_info { 407 struct xfrm_usersa_info info; 408 uint32_t min; 409 uint32_t max; 410 }; 411 412 struct xfrm_userpolicy_info { 413 struct xfrm_selector sel; 414 struct xfrm_lifetime_cfg lft; 415 struct xfrm_lifetime_cur curlft; 416 uint32_t priority; 417 uint32_t index; 418 uint8_t dir; 419 uint8_t action; 420 #define XFRM_POLICY_ALLOW 0 421 #define XFRM_POLICY_BLOCK 1 422 uint8_t flags; 423 #define XFRM_POLICY_LOCALOK 1 /* Allow user to override global policy */ 424 /* Automatically expand selector to include matching ICMP payloads. */ 425 #define XFRM_POLICY_ICMP 2 426 uint8_t share; 427 }; 428 429 struct xfrm_userpolicy_id { 430 struct xfrm_selector sel; 431 uint32_t index; 432 uint8_t dir; 433 }; 434 435 struct xfrm_user_acquire { 436 struct xfrm_id id; 437 xfrm_address_t saddr; 438 struct xfrm_selector sel; 439 struct xfrm_userpolicy_info policy; 440 uint32_t aalgos; 441 uint32_t ealgos; 442 uint32_t calgos; 443 uint32_t seq; 444 }; 445 446 struct xfrm_user_expire { 447 struct xfrm_usersa_info state; 448 uint8_t hard; 449 }; 450 451 struct xfrm_user_polexpire { 452 struct xfrm_userpolicy_info pol; 453 uint8_t hard; 454 }; 455 456 struct xfrm_usersa_flush { 457 uint8_t proto; 458 }; 459 460 struct xfrm_user_report { 461 uint8_t proto; 462 struct xfrm_selector sel; 463 }; 464 465 /* Used by MIGRATE to pass addresses IKE should use to perform 466 * SA negotiation with the peer */ 467 struct xfrm_user_kmaddress { 468 xfrm_address_t local; 469 xfrm_address_t remote; 470 uint32_t reserved; 471 uint16_t family; 472 }; 473 474 struct xfrm_user_migrate { 475 xfrm_address_t old_daddr; 476 xfrm_address_t old_saddr; 477 xfrm_address_t new_daddr; 478 xfrm_address_t new_saddr; 479 uint8_t proto; 480 uint8_t mode; 481 uint16_t reserved; 482 uint32_t reqid; 483 uint16_t old_family; 484 uint16_t new_family; 485 }; 486 487 struct xfrm_user_mapping { 488 struct xfrm_usersa_id id; 489 uint32_t reqid; 490 xfrm_address_t old_saddr; 491 xfrm_address_t new_saddr; 492 uint16_t old_sport; 493 uint16_t new_sport; 494 }; 495 496 struct xfrm_address_filter { 497 xfrm_address_t saddr; 498 xfrm_address_t daddr; 499 uint16_t family; 500 uint8_t splen; 501 uint8_t dplen; 502 }; 503 504 struct xfrm_user_offload { 505 int ifindex; 506 uint8_t flags; 507 }; 508 #define XFRM_OFFLOAD_IPV6 1 509 #define XFRM_OFFLOAD_INBOUND 2 510 511 #ifndef __KERNEL__ 512 /* backwards compatibility for userspace */ 513 #define XFRMGRP_ACQUIRE 1 514 #define XFRMGRP_EXPIRE 2 515 #define XFRMGRP_SA 4 516 #define XFRMGRP_POLICY 8 517 #define XFRMGRP_REPORT 0x20 518 #endif 519 520 enum xfrm_nlgroups { 521 XFRMNLGRP_NONE, 522 #define XFRMNLGRP_NONE XFRMNLGRP_NONE 523 XFRMNLGRP_ACQUIRE, 524 #define XFRMNLGRP_ACQUIRE XFRMNLGRP_ACQUIRE 525 XFRMNLGRP_EXPIRE, 526 #define XFRMNLGRP_EXPIRE XFRMNLGRP_EXPIRE 527 XFRMNLGRP_SA, 528 #define XFRMNLGRP_SA XFRMNLGRP_SA 529 XFRMNLGRP_POLICY, 530 #define XFRMNLGRP_POLICY XFRMNLGRP_POLICY 531 XFRMNLGRP_AEVENTS, 532 #define XFRMNLGRP_AEVENTS XFRMNLGRP_AEVENTS 533 XFRMNLGRP_REPORT, 534 #define XFRMNLGRP_REPORT XFRMNLGRP_REPORT 535 XFRMNLGRP_MIGRATE, 536 #define XFRMNLGRP_MIGRATE XFRMNLGRP_MIGRATE 537 XFRMNLGRP_MAPPING, 538 #define XFRMNLGRP_MAPPING XFRMNLGRP_MAPPING 539 __XFRMNLGRP_MAX 540 }; 541 #define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1) 542 543 #endif /* _LINUX_XFRM_H */ 544