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_IPTFS 5 162 #define XFRM_MODE_MAX 6 163 164 /* Netlink configuration messages. */ 165 enum { 166 XFRM_MSG_BASE = 0x10, 167 168 XFRM_MSG_NEWSA = 0x10, 169 #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA 170 XFRM_MSG_DELSA, 171 #define XFRM_MSG_DELSA XFRM_MSG_DELSA 172 XFRM_MSG_GETSA, 173 #define XFRM_MSG_GETSA XFRM_MSG_GETSA 174 175 XFRM_MSG_NEWPOLICY, 176 #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY 177 XFRM_MSG_DELPOLICY, 178 #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY 179 XFRM_MSG_GETPOLICY, 180 #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY 181 182 XFRM_MSG_ALLOCSPI, 183 #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI 184 XFRM_MSG_ACQUIRE, 185 #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE 186 XFRM_MSG_EXPIRE, 187 #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE 188 189 XFRM_MSG_UPDPOLICY, 190 #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY 191 XFRM_MSG_UPDSA, 192 #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA 193 194 XFRM_MSG_POLEXPIRE, 195 #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE 196 197 XFRM_MSG_FLUSHSA, 198 #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA 199 XFRM_MSG_FLUSHPOLICY, 200 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY 201 202 XFRM_MSG_NEWAE, 203 #define XFRM_MSG_NEWAE XFRM_MSG_NEWAE 204 XFRM_MSG_GETAE, 205 #define XFRM_MSG_GETAE XFRM_MSG_GETAE 206 207 XFRM_MSG_REPORT, 208 #define XFRM_MSG_REPORT XFRM_MSG_REPORT 209 210 XFRM_MSG_MIGRATE, 211 #define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE 212 213 XFRM_MSG_NEWSADINFO, 214 #define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO 215 XFRM_MSG_GETSADINFO, 216 #define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO 217 218 XFRM_MSG_NEWSPDINFO, 219 #define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO 220 XFRM_MSG_GETSPDINFO, 221 #define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO 222 223 XFRM_MSG_MAPPING, 224 #define XFRM_MSG_MAPPING XFRM_MSG_MAPPING 225 226 XFRM_MSG_SETDEFAULT, 227 #define XFRM_MSG_SETDEFAULT XFRM_MSG_SETDEFAULT 228 XFRM_MSG_GETDEFAULT, 229 #define XFRM_MSG_GETDEFAULT XFRM_MSG_GETDEFAULT 230 __XFRM_MSG_MAX 231 }; 232 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1) 233 234 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE) 235 236 /* 237 * Generic LSM security context for communicating to user space 238 * NOTE: Same format as sadb_x_sec_ctx 239 */ 240 struct xfrm_user_sec_ctx { 241 __u16 len; 242 __u16 exttype; 243 __u8 ctx_alg; /* LSMs: e.g., selinux == 1 */ 244 __u8 ctx_doi; 245 __u16 ctx_len; 246 }; 247 248 struct xfrm_user_tmpl { 249 struct xfrm_id id; 250 __u16 family; 251 xfrm_address_t saddr; 252 __u32 reqid; 253 __u8 mode; 254 __u8 share; 255 __u8 optional; 256 __u32 aalgos; 257 __u32 ealgos; 258 __u32 calgos; 259 }; 260 261 struct xfrm_encap_tmpl { 262 __u16 encap_type; 263 __be16 encap_sport; 264 __be16 encap_dport; 265 xfrm_address_t encap_oa; 266 }; 267 268 /* AEVENT flags */ 269 enum xfrm_ae_ftype_t { 270 XFRM_AE_UNSPEC, 271 XFRM_AE_RTHR=1, /* replay threshold*/ 272 XFRM_AE_RVAL=2, /* replay value */ 273 XFRM_AE_LVAL=4, /* lifetime value */ 274 XFRM_AE_ETHR=8, /* expiry timer threshold */ 275 XFRM_AE_CR=16, /* Event cause is replay update */ 276 XFRM_AE_CE=32, /* Event cause is timer expiry */ 277 XFRM_AE_CU=64, /* Event cause is policy update */ 278 __XFRM_AE_MAX 279 280 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1) 281 }; 282 283 struct xfrm_userpolicy_type { 284 __u8 type; 285 __u16 reserved1; 286 __u8 reserved2; 287 }; 288 289 /* Netlink message attributes. */ 290 enum xfrm_attr_type_t { 291 XFRMA_UNSPEC, 292 XFRMA_ALG_AUTH, /* struct xfrm_algo */ 293 XFRMA_ALG_CRYPT, /* struct xfrm_algo */ 294 XFRMA_ALG_COMP, /* struct xfrm_algo */ 295 XFRMA_ENCAP, /* struct xfrm_algo + struct xfrm_encap_tmpl */ 296 XFRMA_TMPL, /* 1 or more struct xfrm_user_tmpl */ 297 XFRMA_SA, /* struct xfrm_usersa_info */ 298 XFRMA_POLICY, /*struct xfrm_userpolicy_info */ 299 XFRMA_SEC_CTX, /* struct xfrm_sec_ctx */ 300 XFRMA_LTIME_VAL, 301 XFRMA_REPLAY_VAL, 302 XFRMA_REPLAY_THRESH, 303 XFRMA_ETIMER_THRESH, 304 XFRMA_SRCADDR, /* xfrm_address_t */ 305 XFRMA_COADDR, /* xfrm_address_t */ 306 XFRMA_LASTUSED, /* __u64 */ 307 XFRMA_POLICY_TYPE, /* struct xfrm_userpolicy_type */ 308 XFRMA_MIGRATE, 309 XFRMA_ALG_AEAD, /* struct xfrm_algo_aead */ 310 XFRMA_KMADDRESS, /* struct xfrm_user_kmaddress */ 311 XFRMA_ALG_AUTH_TRUNC, /* struct xfrm_algo_auth */ 312 XFRMA_MARK, /* struct xfrm_mark */ 313 XFRMA_TFCPAD, /* __u32 */ 314 XFRMA_REPLAY_ESN_VAL, /* struct xfrm_replay_state_esn */ 315 XFRMA_SA_EXTRA_FLAGS, /* __u32 */ 316 XFRMA_PROTO, /* __u8 */ 317 XFRMA_ADDRESS_FILTER, /* struct xfrm_address_filter */ 318 XFRMA_PAD, 319 XFRMA_OFFLOAD_DEV, /* struct xfrm_user_offload */ 320 XFRMA_SET_MARK, /* __u32 */ 321 XFRMA_SET_MARK_MASK, /* __u32 */ 322 XFRMA_IF_ID, /* __u32 */ 323 XFRMA_MTIMER_THRESH, /* __u32 in seconds for input SA */ 324 XFRMA_SA_DIR, /* __u8 */ 325 XFRMA_NAT_KEEPALIVE_INTERVAL, /* __u32 in seconds for NAT keepalive */ 326 XFRMA_SA_PCPU, /* __u32 */ 327 XFRMA_IPTFS_DROP_TIME, /* __u32 in: usec to wait for next seq */ 328 XFRMA_IPTFS_REORDER_WINDOW, /* __u16 in: reorder window size (pkts) */ 329 XFRMA_IPTFS_DONT_FRAG, /* out: don't use fragmentation */ 330 XFRMA_IPTFS_INIT_DELAY, /* __u32 out: initial packet wait delay (usec) */ 331 XFRMA_IPTFS_MAX_QSIZE, /* __u32 out: max ingress queue size (octets) */ 332 XFRMA_IPTFS_PKT_SIZE, /* __u32 out: size of outer packet, 0 for PMTU */ 333 __XFRMA_MAX 334 335 #define XFRMA_OUTPUT_MARK XFRMA_SET_MARK /* Compatibility */ 336 #define XFRMA_MAX (__XFRMA_MAX - 1) 337 }; 338 339 struct xfrm_mark { 340 __u32 v; /* value */ 341 __u32 m; /* mask */ 342 }; 343 344 enum xfrm_sadattr_type_t { 345 XFRMA_SAD_UNSPEC, 346 XFRMA_SAD_CNT, 347 XFRMA_SAD_HINFO, 348 __XFRMA_SAD_MAX 349 350 #define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1) 351 }; 352 353 struct xfrmu_sadhinfo { 354 __u32 sadhcnt; /* current hash bkts */ 355 __u32 sadhmcnt; /* max allowed hash bkts */ 356 }; 357 358 enum xfrm_spdattr_type_t { 359 XFRMA_SPD_UNSPEC, 360 XFRMA_SPD_INFO, 361 XFRMA_SPD_HINFO, 362 XFRMA_SPD_IPV4_HTHRESH, 363 XFRMA_SPD_IPV6_HTHRESH, 364 __XFRMA_SPD_MAX 365 366 #define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1) 367 }; 368 369 struct xfrmu_spdinfo { 370 __u32 incnt; 371 __u32 outcnt; 372 __u32 fwdcnt; 373 __u32 inscnt; 374 __u32 outscnt; 375 __u32 fwdscnt; 376 }; 377 378 struct xfrmu_spdhinfo { 379 __u32 spdhcnt; 380 __u32 spdhmcnt; 381 }; 382 383 struct xfrmu_spdhthresh { 384 __u8 lbits; 385 __u8 rbits; 386 }; 387 388 struct xfrm_usersa_info { 389 struct xfrm_selector sel; 390 struct xfrm_id id; 391 xfrm_address_t saddr; 392 struct xfrm_lifetime_cfg lft; 393 struct xfrm_lifetime_cur curlft; 394 struct xfrm_stats stats; 395 __u32 seq; 396 __u32 reqid; 397 __u16 family; 398 __u8 mode; /* XFRM_MODE_xxx */ 399 __u8 replay_window; 400 __u8 flags; 401 #define XFRM_STATE_NOECN 1 402 #define XFRM_STATE_DECAP_DSCP 2 403 #define XFRM_STATE_NOPMTUDISC 4 404 #define XFRM_STATE_WILDRECV 8 405 #define XFRM_STATE_ICMP 16 406 #define XFRM_STATE_AF_UNSPEC 32 407 #define XFRM_STATE_ALIGN4 64 408 #define XFRM_STATE_ESN 128 409 }; 410 411 #define XFRM_SA_XFLAG_DONT_ENCAP_DSCP 1 412 #define XFRM_SA_XFLAG_OSEQ_MAY_WRAP 2 413 414 struct xfrm_usersa_id { 415 xfrm_address_t daddr; 416 __be32 spi; 417 __u16 family; 418 __u8 proto; 419 }; 420 421 struct xfrm_aevent_id { 422 struct xfrm_usersa_id sa_id; 423 xfrm_address_t saddr; 424 __u32 flags; 425 __u32 reqid; 426 }; 427 428 struct xfrm_userspi_info { 429 struct xfrm_usersa_info info; 430 __u32 min; 431 __u32 max; 432 }; 433 434 struct xfrm_userpolicy_info { 435 struct xfrm_selector sel; 436 struct xfrm_lifetime_cfg lft; 437 struct xfrm_lifetime_cur curlft; 438 __u32 priority; 439 __u32 index; 440 __u8 dir; 441 __u8 action; 442 #define XFRM_POLICY_ALLOW 0 443 #define XFRM_POLICY_BLOCK 1 444 __u8 flags; 445 #define XFRM_POLICY_LOCALOK 1 /* Allow user to override global policy */ 446 /* Automatically expand selector to include matching ICMP payloads. */ 447 #define XFRM_POLICY_ICMP 2 448 #define XFRM_POLICY_CPU_ACQUIRE 4 449 __u8 share; 450 }; 451 452 struct xfrm_userpolicy_id { 453 struct xfrm_selector sel; 454 __u32 index; 455 __u8 dir; 456 }; 457 458 struct xfrm_user_acquire { 459 struct xfrm_id id; 460 xfrm_address_t saddr; 461 struct xfrm_selector sel; 462 struct xfrm_userpolicy_info policy; 463 __u32 aalgos; 464 __u32 ealgos; 465 __u32 calgos; 466 __u32 seq; 467 }; 468 469 struct xfrm_user_expire { 470 struct xfrm_usersa_info state; 471 __u8 hard; 472 }; 473 474 struct xfrm_user_polexpire { 475 struct xfrm_userpolicy_info pol; 476 __u8 hard; 477 }; 478 479 struct xfrm_usersa_flush { 480 __u8 proto; 481 }; 482 483 struct xfrm_user_report { 484 __u8 proto; 485 struct xfrm_selector sel; 486 }; 487 488 /* Used by MIGRATE to pass addresses IKE should use to perform 489 * SA negotiation with the peer */ 490 struct xfrm_user_kmaddress { 491 xfrm_address_t local; 492 xfrm_address_t remote; 493 __u32 reserved; 494 __u16 family; 495 }; 496 497 struct xfrm_user_migrate { 498 xfrm_address_t old_daddr; 499 xfrm_address_t old_saddr; 500 xfrm_address_t new_daddr; 501 xfrm_address_t new_saddr; 502 __u8 proto; 503 __u8 mode; 504 __u16 reserved; 505 __u32 reqid; 506 __u16 old_family; 507 __u16 new_family; 508 }; 509 510 struct xfrm_user_mapping { 511 struct xfrm_usersa_id id; 512 __u32 reqid; 513 xfrm_address_t old_saddr; 514 xfrm_address_t new_saddr; 515 __be16 old_sport; 516 __be16 new_sport; 517 }; 518 519 struct xfrm_address_filter { 520 xfrm_address_t saddr; 521 xfrm_address_t daddr; 522 __u16 family; 523 __u8 splen; 524 __u8 dplen; 525 }; 526 527 struct xfrm_user_offload { 528 int ifindex; 529 __u8 flags; 530 }; 531 /* This flag was exposed without any kernel code that supports it. 532 * Unfortunately, strongswan has the code that sets this flag, 533 * which makes it impossible to reuse this bit. 534 * 535 * So leave it here to make sure that it won't be reused by mistake. 536 */ 537 #define XFRM_OFFLOAD_IPV6 1 538 #define XFRM_OFFLOAD_INBOUND 2 539 /* Two bits above are relevant for state path only, while 540 * offload is used for both policy and state flows. 541 * 542 * In policy offload mode, they are free and can be safely reused. 543 */ 544 #define XFRM_OFFLOAD_PACKET 4 545 546 struct xfrm_userpolicy_default { 547 #define XFRM_USERPOLICY_UNSPEC 0 548 #define XFRM_USERPOLICY_BLOCK 1 549 #define XFRM_USERPOLICY_ACCEPT 2 550 __u8 in; 551 __u8 fwd; 552 __u8 out; 553 }; 554 555 #ifndef __KERNEL__ 556 /* backwards compatibility for userspace */ 557 #define XFRMGRP_ACQUIRE 1 558 #define XFRMGRP_EXPIRE 2 559 #define XFRMGRP_SA 4 560 #define XFRMGRP_POLICY 8 561 #define XFRMGRP_REPORT 0x20 562 #endif 563 564 enum xfrm_nlgroups { 565 XFRMNLGRP_NONE, 566 #define XFRMNLGRP_NONE XFRMNLGRP_NONE 567 XFRMNLGRP_ACQUIRE, 568 #define XFRMNLGRP_ACQUIRE XFRMNLGRP_ACQUIRE 569 XFRMNLGRP_EXPIRE, 570 #define XFRMNLGRP_EXPIRE XFRMNLGRP_EXPIRE 571 XFRMNLGRP_SA, 572 #define XFRMNLGRP_SA XFRMNLGRP_SA 573 XFRMNLGRP_POLICY, 574 #define XFRMNLGRP_POLICY XFRMNLGRP_POLICY 575 XFRMNLGRP_AEVENTS, 576 #define XFRMNLGRP_AEVENTS XFRMNLGRP_AEVENTS 577 XFRMNLGRP_REPORT, 578 #define XFRMNLGRP_REPORT XFRMNLGRP_REPORT 579 XFRMNLGRP_MIGRATE, 580 #define XFRMNLGRP_MIGRATE XFRMNLGRP_MIGRATE 581 XFRMNLGRP_MAPPING, 582 #define XFRMNLGRP_MAPPING XFRMNLGRP_MAPPING 583 __XFRMNLGRP_MAX 584 }; 585 #define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1) 586 587 #endif /* _LINUX_XFRM_H */ 588