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_OUTPUT_MARK, /* __u32 */ 309 __XFRMA_MAX 310 311 #define XFRMA_MAX (__XFRMA_MAX - 1) 312 }; 313 314 struct xfrm_mark { 315 __u32 v; /* value */ 316 __u32 m; /* mask */ 317 }; 318 319 enum xfrm_sadattr_type_t { 320 XFRMA_SAD_UNSPEC, 321 XFRMA_SAD_CNT, 322 XFRMA_SAD_HINFO, 323 __XFRMA_SAD_MAX 324 325 #define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1) 326 }; 327 328 struct xfrmu_sadhinfo { 329 __u32 sadhcnt; /* current hash bkts */ 330 __u32 sadhmcnt; /* max allowed hash bkts */ 331 }; 332 333 enum xfrm_spdattr_type_t { 334 XFRMA_SPD_UNSPEC, 335 XFRMA_SPD_INFO, 336 XFRMA_SPD_HINFO, 337 XFRMA_SPD_IPV4_HTHRESH, 338 XFRMA_SPD_IPV6_HTHRESH, 339 __XFRMA_SPD_MAX 340 341 #define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1) 342 }; 343 344 struct xfrmu_spdinfo { 345 __u32 incnt; 346 __u32 outcnt; 347 __u32 fwdcnt; 348 __u32 inscnt; 349 __u32 outscnt; 350 __u32 fwdscnt; 351 }; 352 353 struct xfrmu_spdhinfo { 354 __u32 spdhcnt; 355 __u32 spdhmcnt; 356 }; 357 358 struct xfrmu_spdhthresh { 359 __u8 lbits; 360 __u8 rbits; 361 }; 362 363 struct xfrm_usersa_info { 364 struct xfrm_selector sel; 365 struct xfrm_id id; 366 xfrm_address_t saddr; 367 struct xfrm_lifetime_cfg lft; 368 struct xfrm_lifetime_cur curlft; 369 struct xfrm_stats stats; 370 __u32 seq; 371 __u32 reqid; 372 __u16 family; 373 __u8 mode; /* XFRM_MODE_xxx */ 374 __u8 replay_window; 375 __u8 flags; 376 #define XFRM_STATE_NOECN 1 377 #define XFRM_STATE_DECAP_DSCP 2 378 #define XFRM_STATE_NOPMTUDISC 4 379 #define XFRM_STATE_WILDRECV 8 380 #define XFRM_STATE_ICMP 16 381 #define XFRM_STATE_AF_UNSPEC 32 382 #define XFRM_STATE_ALIGN4 64 383 #define XFRM_STATE_ESN 128 384 }; 385 386 #define XFRM_SA_XFLAG_DONT_ENCAP_DSCP 1 387 388 struct xfrm_usersa_id { 389 xfrm_address_t daddr; 390 __be32 spi; 391 __u16 family; 392 __u8 proto; 393 }; 394 395 struct xfrm_aevent_id { 396 struct xfrm_usersa_id sa_id; 397 xfrm_address_t saddr; 398 __u32 flags; 399 __u32 reqid; 400 }; 401 402 struct xfrm_userspi_info { 403 struct xfrm_usersa_info info; 404 __u32 min; 405 __u32 max; 406 }; 407 408 struct xfrm_userpolicy_info { 409 struct xfrm_selector sel; 410 struct xfrm_lifetime_cfg lft; 411 struct xfrm_lifetime_cur curlft; 412 __u32 priority; 413 __u32 index; 414 __u8 dir; 415 __u8 action; 416 #define XFRM_POLICY_ALLOW 0 417 #define XFRM_POLICY_BLOCK 1 418 __u8 flags; 419 #define XFRM_POLICY_LOCALOK 1 /* Allow user to override global policy */ 420 /* Automatically expand selector to include matching ICMP payloads. */ 421 #define XFRM_POLICY_ICMP 2 422 __u8 share; 423 }; 424 425 struct xfrm_userpolicy_id { 426 struct xfrm_selector sel; 427 __u32 index; 428 __u8 dir; 429 }; 430 431 struct xfrm_user_acquire { 432 struct xfrm_id id; 433 xfrm_address_t saddr; 434 struct xfrm_selector sel; 435 struct xfrm_userpolicy_info policy; 436 __u32 aalgos; 437 __u32 ealgos; 438 __u32 calgos; 439 __u32 seq; 440 }; 441 442 struct xfrm_user_expire { 443 struct xfrm_usersa_info state; 444 __u8 hard; 445 }; 446 447 struct xfrm_user_polexpire { 448 struct xfrm_userpolicy_info pol; 449 __u8 hard; 450 }; 451 452 struct xfrm_usersa_flush { 453 __u8 proto; 454 }; 455 456 struct xfrm_user_report { 457 __u8 proto; 458 struct xfrm_selector sel; 459 }; 460 461 /* Used by MIGRATE to pass addresses IKE should use to perform 462 * SA negotiation with the peer */ 463 struct xfrm_user_kmaddress { 464 xfrm_address_t local; 465 xfrm_address_t remote; 466 __u32 reserved; 467 __u16 family; 468 }; 469 470 struct xfrm_user_migrate { 471 xfrm_address_t old_daddr; 472 xfrm_address_t old_saddr; 473 xfrm_address_t new_daddr; 474 xfrm_address_t new_saddr; 475 __u8 proto; 476 __u8 mode; 477 __u16 reserved; 478 __u32 reqid; 479 __u16 old_family; 480 __u16 new_family; 481 }; 482 483 struct xfrm_user_mapping { 484 struct xfrm_usersa_id id; 485 __u32 reqid; 486 xfrm_address_t old_saddr; 487 xfrm_address_t new_saddr; 488 __be16 old_sport; 489 __be16 new_sport; 490 }; 491 492 struct xfrm_address_filter { 493 xfrm_address_t saddr; 494 xfrm_address_t daddr; 495 __u16 family; 496 __u8 splen; 497 __u8 dplen; 498 }; 499 500 struct xfrm_user_offload { 501 int ifindex; 502 __u8 flags; 503 }; 504 #define XFRM_OFFLOAD_IPV6 1 505 #define XFRM_OFFLOAD_INBOUND 2 506 507 #ifndef __KERNEL__ 508 /* backwards compatibility for userspace */ 509 #define XFRMGRP_ACQUIRE 1 510 #define XFRMGRP_EXPIRE 2 511 #define XFRMGRP_SA 4 512 #define XFRMGRP_POLICY 8 513 #define XFRMGRP_REPORT 0x20 514 #endif 515 516 enum xfrm_nlgroups { 517 XFRMNLGRP_NONE, 518 #define XFRMNLGRP_NONE XFRMNLGRP_NONE 519 XFRMNLGRP_ACQUIRE, 520 #define XFRMNLGRP_ACQUIRE XFRMNLGRP_ACQUIRE 521 XFRMNLGRP_EXPIRE, 522 #define XFRMNLGRP_EXPIRE XFRMNLGRP_EXPIRE 523 XFRMNLGRP_SA, 524 #define XFRMNLGRP_SA XFRMNLGRP_SA 525 XFRMNLGRP_POLICY, 526 #define XFRMNLGRP_POLICY XFRMNLGRP_POLICY 527 XFRMNLGRP_AEVENTS, 528 #define XFRMNLGRP_AEVENTS XFRMNLGRP_AEVENTS 529 XFRMNLGRP_REPORT, 530 #define XFRMNLGRP_REPORT XFRMNLGRP_REPORT 531 XFRMNLGRP_MIGRATE, 532 #define XFRMNLGRP_MIGRATE XFRMNLGRP_MIGRATE 533 XFRMNLGRP_MAPPING, 534 #define XFRMNLGRP_MAPPING XFRMNLGRP_MAPPING 535 __XFRMNLGRP_MAX 536 }; 537 #define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1) 538 539 #endif /* _LINUX_XFRM_H */ 540
