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