1 #ifndef _LINUX_XFRM_H 2 #define _LINUX_XFRM_H 3 4 #include <linux/in6.h> 5 #include <linux/types.h> 6 7 /* All of the structures in this file may not change size as they are 8 * passed into the kernel from userspace via netlink sockets. 9 */ 10 11 /* Structure to encapsulate addresses. I do not want to use 12 * "standard" structure. My apologies. 13 */ 14 typedef union { 15 __be32 a4; 16 __be32 a6[4]; 17 struct in6_addr in6; 18 } xfrm_address_t; 19 20 /* Ident of a specific xfrm_state. It is used on input to lookup 21 * the state by (spi,daddr,ah/esp) or to store information about 22 * spi, protocol and tunnel address on output. 23 */ 24 struct xfrm_id { 25 xfrm_address_t daddr; 26 __be32 spi; 27 __u8 proto; 28 }; 29 30 struct xfrm_sec_ctx { 31 __u8 ctx_doi; 32 __u8 ctx_alg; 33 __u16 ctx_len; 34 __u32 ctx_sid; 35 char ctx_str[0]; 36 }; 37 38 /* Security Context Domains of Interpretation */ 39 #define XFRM_SC_DOI_RESERVED 0 40 #define XFRM_SC_DOI_LSM 1 41 42 /* Security Context Algorithms */ 43 #define XFRM_SC_ALG_RESERVED 0 44 #define XFRM_SC_ALG_SELINUX 1 45 46 /* Selector, used as selector both on policy rules (SPD) and SAs. */ 47 48 struct xfrm_selector { 49 xfrm_address_t daddr; 50 xfrm_address_t saddr; 51 __be16 dport; 52 __be16 dport_mask; 53 __be16 sport; 54 __be16 sport_mask; 55 __u16 family; 56 __u8 prefixlen_d; 57 __u8 prefixlen_s; 58 __u8 proto; 59 int ifindex; 60 __kernel_uid32_t user; 61 }; 62 63 #define XFRM_INF (~(__u64)0) 64 65 struct xfrm_lifetime_cfg { 66 __u64 soft_byte_limit; 67 __u64 hard_byte_limit; 68 __u64 soft_packet_limit; 69 __u64 hard_packet_limit; 70 __u64 soft_add_expires_seconds; 71 __u64 hard_add_expires_seconds; 72 __u64 soft_use_expires_seconds; 73 __u64 hard_use_expires_seconds; 74 }; 75 76 struct xfrm_lifetime_cur { 77 __u64 bytes; 78 __u64 packets; 79 __u64 add_time; 80 __u64 use_time; 81 }; 82 83 struct xfrm_replay_state { 84 __u32 oseq; 85 __u32 seq; 86 __u32 bitmap; 87 }; 88 89 #define XFRMA_REPLAY_ESN_MAX 4096 90 91 struct xfrm_replay_state_esn { 92 unsigned int bmp_len; 93 __u32 oseq; 94 __u32 seq; 95 __u32 oseq_hi; 96 __u32 seq_hi; 97 __u32 replay_window; 98 __u32 bmp[0]; 99 }; 100 101 struct xfrm_algo { 102 char alg_name[64]; 103 unsigned int alg_key_len; /* in bits */ 104 char alg_key[0]; 105 }; 106 107 struct xfrm_algo_auth { 108 char alg_name[64]; 109 unsigned int alg_key_len; /* in bits */ 110 unsigned int alg_trunc_len; /* in bits */ 111 char alg_key[0]; 112 }; 113 114 struct xfrm_algo_aead { 115 char alg_name[64]; 116 unsigned int alg_key_len; /* in bits */ 117 unsigned int alg_icv_len; /* in bits */ 118 char alg_key[0]; 119 }; 120 121 struct xfrm_stats { 122 __u32 replay_window; 123 __u32 replay; 124 __u32 integrity_failed; 125 }; 126 127 enum { 128 XFRM_POLICY_TYPE_MAIN = 0, 129 XFRM_POLICY_TYPE_SUB = 1, 130 XFRM_POLICY_TYPE_MAX = 2, 131 XFRM_POLICY_TYPE_ANY = 255 132 }; 133 134 enum { 135 XFRM_POLICY_IN = 0, 136 XFRM_POLICY_OUT = 1, 137 XFRM_POLICY_FWD = 2, 138 XFRM_POLICY_MASK = 3, 139 XFRM_POLICY_MAX = 3 140 }; 141 142 enum { 143 XFRM_SHARE_ANY, /* No limitations */ 144 XFRM_SHARE_SESSION, /* For this session only */ 145 XFRM_SHARE_USER, /* For this user only */ 146 XFRM_SHARE_UNIQUE /* Use once */ 147 }; 148 149 #define XFRM_MODE_TRANSPORT 0 150 #define XFRM_MODE_TUNNEL 1 151 #define XFRM_MODE_ROUTEOPTIMIZATION 2 152 #define XFRM_MODE_IN_TRIGGER 3 153 #define XFRM_MODE_BEET 4 154 #define XFRM_MODE_MAX 5 155 156 /* Netlink configuration messages. */ 157 enum { 158 XFRM_MSG_BASE = 0x10, 159 160 XFRM_MSG_NEWSA = 0x10, 161 #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA 162 XFRM_MSG_DELSA, 163 #define XFRM_MSG_DELSA XFRM_MSG_DELSA 164 XFRM_MSG_GETSA, 165 #define XFRM_MSG_GETSA XFRM_MSG_GETSA 166 167 XFRM_MSG_NEWPOLICY, 168 #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY 169 XFRM_MSG_DELPOLICY, 170 #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY 171 XFRM_MSG_GETPOLICY, 172 #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY 173 174 XFRM_MSG_ALLOCSPI, 175 #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI 176 XFRM_MSG_ACQUIRE, 177 #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE 178 XFRM_MSG_EXPIRE, 179 #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE 180 181 XFRM_MSG_UPDPOLICY, 182 #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY 183 XFRM_MSG_UPDSA, 184 #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA 185 186 XFRM_MSG_POLEXPIRE, 187 #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE 188 189 XFRM_MSG_FLUSHSA, 190 #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA 191 XFRM_MSG_FLUSHPOLICY, 192 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY 193 194 XFRM_MSG_NEWAE, 195 #define XFRM_MSG_NEWAE XFRM_MSG_NEWAE 196 XFRM_MSG_GETAE, 197 #define XFRM_MSG_GETAE XFRM_MSG_GETAE 198 199 XFRM_MSG_REPORT, 200 #define XFRM_MSG_REPORT XFRM_MSG_REPORT 201 202 XFRM_MSG_MIGRATE, 203 #define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE 204 205 XFRM_MSG_NEWSADINFO, 206 #define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO 207 XFRM_MSG_GETSADINFO, 208 #define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO 209 210 XFRM_MSG_NEWSPDINFO, 211 #define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO 212 XFRM_MSG_GETSPDINFO, 213 #define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO 214 215 XFRM_MSG_MAPPING, 216 #define XFRM_MSG_MAPPING XFRM_MSG_MAPPING 217 __XFRM_MSG_MAX 218 }; 219 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1) 220 221 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE) 222 223 /* 224 * Generic LSM security context for comunicating to user space 225 * NOTE: Same format as sadb_x_sec_ctx 226 */ 227 struct xfrm_user_sec_ctx { 228 __u16 len; 229 __u16 exttype; 230 __u8 ctx_alg; /* LSMs: e.g., selinux == 1 */ 231 __u8 ctx_doi; 232 __u16 ctx_len; 233 }; 234 235 struct xfrm_user_tmpl { 236 struct xfrm_id id; 237 __u16 family; 238 xfrm_address_t saddr; 239 __u32 reqid; 240 __u8 mode; 241 __u8 share; 242 __u8 optional; 243 __u32 aalgos; 244 __u32 ealgos; 245 __u32 calgos; 246 }; 247 248 struct xfrm_encap_tmpl { 249 __u16 encap_type; 250 __be16 encap_sport; 251 __be16 encap_dport; 252 xfrm_address_t encap_oa; 253 }; 254 255 /* AEVENT flags */ 256 enum xfrm_ae_ftype_t { 257 XFRM_AE_UNSPEC, 258 XFRM_AE_RTHR=1, /* replay threshold*/ 259 XFRM_AE_RVAL=2, /* replay value */ 260 XFRM_AE_LVAL=4, /* lifetime value */ 261 XFRM_AE_ETHR=8, /* expiry timer threshold */ 262 XFRM_AE_CR=16, /* Event cause is replay update */ 263 XFRM_AE_CE=32, /* Event cause is timer expiry */ 264 XFRM_AE_CU=64, /* Event cause is policy update */ 265 __XFRM_AE_MAX 266 267 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1) 268 }; 269 270 struct xfrm_userpolicy_type { 271 __u8 type; 272 __u16 reserved1; 273 __u8 reserved2; 274 }; 275 276 /* Netlink message attributes. */ 277 enum xfrm_attr_type_t { 278 XFRMA_UNSPEC, 279 XFRMA_ALG_AUTH, /* struct xfrm_algo */ 280 XFRMA_ALG_CRYPT, /* struct xfrm_algo */ 281 XFRMA_ALG_COMP, /* struct xfrm_algo */ 282 XFRMA_ENCAP, /* struct xfrm_algo + struct xfrm_encap_tmpl */ 283 XFRMA_TMPL, /* 1 or more struct xfrm_user_tmpl */ 284 XFRMA_SA, /* struct xfrm_usersa_info */ 285 XFRMA_POLICY, /*struct xfrm_userpolicy_info */ 286 XFRMA_SEC_CTX, /* struct xfrm_sec_ctx */ 287 XFRMA_LTIME_VAL, 288 XFRMA_REPLAY_VAL, 289 XFRMA_REPLAY_THRESH, 290 XFRMA_ETIMER_THRESH, 291 XFRMA_SRCADDR, /* xfrm_address_t */ 292 XFRMA_COADDR, /* xfrm_address_t */ 293 XFRMA_LASTUSED, /* unsigned long */ 294 XFRMA_POLICY_TYPE, /* struct xfrm_userpolicy_type */ 295 XFRMA_MIGRATE, 296 XFRMA_ALG_AEAD, /* struct xfrm_algo_aead */ 297 XFRMA_KMADDRESS, /* struct xfrm_user_kmaddress */ 298 XFRMA_ALG_AUTH_TRUNC, /* struct xfrm_algo_auth */ 299 XFRMA_MARK, /* struct xfrm_mark */ 300 XFRMA_TFCPAD, /* __u32 */ 301 XFRMA_REPLAY_ESN_VAL, /* struct xfrm_replay_state_esn */ 302 XFRMA_SA_EXTRA_FLAGS, /* __u32 */ 303 XFRMA_PROTO, /* __u8 */ 304 XFRMA_ADDRESS_FILTER, /* struct xfrm_address_filter */ 305 XFRMA_PAD, 306 XFRMA_OFFLOAD_DEV, /* struct xfrm_state_offload */ 307 __XFRMA_MAX 308 309 #define XFRMA_MAX (__XFRMA_MAX - 1) 310 }; 311 312 struct xfrm_mark { 313 __u32 v; /* value */ 314 __u32 m; /* mask */ 315 }; 316 317 enum xfrm_sadattr_type_t { 318 XFRMA_SAD_UNSPEC, 319 XFRMA_SAD_CNT, 320 XFRMA_SAD_HINFO, 321 __XFRMA_SAD_MAX 322 323 #define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1) 324 }; 325 326 struct xfrmu_sadhinfo { 327 __u32 sadhcnt; /* current hash bkts */ 328 __u32 sadhmcnt; /* max allowed hash bkts */ 329 }; 330 331 enum xfrm_spdattr_type_t { 332 XFRMA_SPD_UNSPEC, 333 XFRMA_SPD_INFO, 334 XFRMA_SPD_HINFO, 335 XFRMA_SPD_IPV4_HTHRESH, 336 XFRMA_SPD_IPV6_HTHRESH, 337 __XFRMA_SPD_MAX 338 339 #define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1) 340 }; 341 342 struct xfrmu_spdinfo { 343 __u32 incnt; 344 __u32 outcnt; 345 __u32 fwdcnt; 346 __u32 inscnt; 347 __u32 outscnt; 348 __u32 fwdscnt; 349 }; 350 351 struct xfrmu_spdhinfo { 352 __u32 spdhcnt; 353 __u32 spdhmcnt; 354 }; 355 356 struct xfrmu_spdhthresh { 357 __u8 lbits; 358 __u8 rbits; 359 }; 360 361 struct xfrm_usersa_info { 362 struct xfrm_selector sel; 363 struct xfrm_id id; 364 xfrm_address_t saddr; 365 struct xfrm_lifetime_cfg lft; 366 struct xfrm_lifetime_cur curlft; 367 struct xfrm_stats stats; 368 __u32 seq; 369 __u32 reqid; 370 __u16 family; 371 __u8 mode; /* XFRM_MODE_xxx */ 372 __u8 replay_window; 373 __u8 flags; 374 #define XFRM_STATE_NOECN 1 375 #define XFRM_STATE_DECAP_DSCP 2 376 #define XFRM_STATE_NOPMTUDISC 4 377 #define XFRM_STATE_WILDRECV 8 378 #define XFRM_STATE_ICMP 16 379 #define XFRM_STATE_AF_UNSPEC 32 380 #define XFRM_STATE_ALIGN4 64 381 #define XFRM_STATE_ESN 128 382 }; 383 384 #define XFRM_SA_XFLAG_DONT_ENCAP_DSCP 1 385 386 struct xfrm_usersa_id { 387 xfrm_address_t daddr; 388 __be32 spi; 389 __u16 family; 390 __u8 proto; 391 }; 392 393 struct xfrm_aevent_id { 394 struct xfrm_usersa_id sa_id; 395 xfrm_address_t saddr; 396 __u32 flags; 397 __u32 reqid; 398 }; 399 400 struct xfrm_userspi_info { 401 struct xfrm_usersa_info info; 402 __u32 min; 403 __u32 max; 404 }; 405 406 struct xfrm_userpolicy_info { 407 struct xfrm_selector sel; 408 struct xfrm_lifetime_cfg lft; 409 struct xfrm_lifetime_cur curlft; 410 __u32 priority; 411 __u32 index; 412 __u8 dir; 413 __u8 action; 414 #define XFRM_POLICY_ALLOW 0 415 #define XFRM_POLICY_BLOCK 1 416 __u8 flags; 417 #define XFRM_POLICY_LOCALOK 1 /* Allow user to override global policy */ 418 /* Automatically expand selector to include matching ICMP payloads. */ 419 #define XFRM_POLICY_ICMP 2 420 __u8 share; 421 }; 422 423 struct xfrm_userpolicy_id { 424 struct xfrm_selector sel; 425 __u32 index; 426 __u8 dir; 427 }; 428 429 struct xfrm_user_acquire { 430 struct xfrm_id id; 431 xfrm_address_t saddr; 432 struct xfrm_selector sel; 433 struct xfrm_userpolicy_info policy; 434 __u32 aalgos; 435 __u32 ealgos; 436 __u32 calgos; 437 __u32 seq; 438 }; 439 440 struct xfrm_user_expire { 441 struct xfrm_usersa_info state; 442 __u8 hard; 443 }; 444 445 struct xfrm_user_polexpire { 446 struct xfrm_userpolicy_info pol; 447 __u8 hard; 448 }; 449 450 struct xfrm_usersa_flush { 451 __u8 proto; 452 }; 453 454 struct xfrm_user_report { 455 __u8 proto; 456 struct xfrm_selector sel; 457 }; 458 459 /* Used by MIGRATE to pass addresses IKE should use to perform 460 * SA negotiation with the peer */ 461 struct xfrm_user_kmaddress { 462 xfrm_address_t local; 463 xfrm_address_t remote; 464 __u32 reserved; 465 __u16 family; 466 }; 467 468 struct xfrm_user_migrate { 469 xfrm_address_t old_daddr; 470 xfrm_address_t old_saddr; 471 xfrm_address_t new_daddr; 472 xfrm_address_t new_saddr; 473 __u8 proto; 474 __u8 mode; 475 __u16 reserved; 476 __u32 reqid; 477 __u16 old_family; 478 __u16 new_family; 479 }; 480 481 struct xfrm_user_mapping { 482 struct xfrm_usersa_id id; 483 __u32 reqid; 484 xfrm_address_t old_saddr; 485 xfrm_address_t new_saddr; 486 __be16 old_sport; 487 __be16 new_sport; 488 }; 489 490 struct xfrm_address_filter { 491 xfrm_address_t saddr; 492 xfrm_address_t daddr; 493 __u16 family; 494 __u8 splen; 495 __u8 dplen; 496 }; 497 498 struct xfrm_user_offload { 499 int ifindex; 500 __u8 flags; 501 }; 502 #define XFRM_OFFLOAD_IPV6 1 503 #define XFRM_OFFLOAD_INBOUND 2 504 505 #ifndef __KERNEL__ 506 /* backwards compatibility for userspace */ 507 #define XFRMGRP_ACQUIRE 1 508 #define XFRMGRP_EXPIRE 2 509 #define XFRMGRP_SA 4 510 #define XFRMGRP_POLICY 8 511 #define XFRMGRP_REPORT 0x20 512 #endif 513 514 enum xfrm_nlgroups { 515 XFRMNLGRP_NONE, 516 #define XFRMNLGRP_NONE XFRMNLGRP_NONE 517 XFRMNLGRP_ACQUIRE, 518 #define XFRMNLGRP_ACQUIRE XFRMNLGRP_ACQUIRE 519 XFRMNLGRP_EXPIRE, 520 #define XFRMNLGRP_EXPIRE XFRMNLGRP_EXPIRE 521 XFRMNLGRP_SA, 522 #define XFRMNLGRP_SA XFRMNLGRP_SA 523 XFRMNLGRP_POLICY, 524 #define XFRMNLGRP_POLICY XFRMNLGRP_POLICY 525 XFRMNLGRP_AEVENTS, 526 #define XFRMNLGRP_AEVENTS XFRMNLGRP_AEVENTS 527 XFRMNLGRP_REPORT, 528 #define XFRMNLGRP_REPORT XFRMNLGRP_REPORT 529 XFRMNLGRP_MIGRATE, 530 #define XFRMNLGRP_MIGRATE XFRMNLGRP_MIGRATE 531 XFRMNLGRP_MAPPING, 532 #define XFRMNLGRP_MAPPING XFRMNLGRP_MAPPING 533 __XFRMNLGRP_MAX 534 }; 535 #define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1) 536 537 #endif /* _LINUX_XFRM_H */ 538