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_MAX 301 302 #define XFRMA_MAX (__XFRMA_MAX - 1) 303 }; 304 305 struct xfrm_mark { 306 __u32 v; /* value */ 307 __u32 m; /* mask */ 308 }; 309 310 enum xfrm_sadattr_type_t { 311 XFRMA_SAD_UNSPEC, 312 XFRMA_SAD_CNT, 313 XFRMA_SAD_HINFO, 314 __XFRMA_SAD_MAX 315 316 #define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1) 317 }; 318 319 struct xfrmu_sadhinfo { 320 __u32 sadhcnt; /* current hash bkts */ 321 __u32 sadhmcnt; /* max allowed hash bkts */ 322 }; 323 324 enum xfrm_spdattr_type_t { 325 XFRMA_SPD_UNSPEC, 326 XFRMA_SPD_INFO, 327 XFRMA_SPD_HINFO, 328 __XFRMA_SPD_MAX 329 330 #define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1) 331 }; 332 333 struct xfrmu_spdinfo { 334 __u32 incnt; 335 __u32 outcnt; 336 __u32 fwdcnt; 337 __u32 inscnt; 338 __u32 outscnt; 339 __u32 fwdscnt; 340 }; 341 342 struct xfrmu_spdhinfo { 343 __u32 spdhcnt; 344 __u32 spdhmcnt; 345 }; 346 347 struct xfrm_usersa_info { 348 struct xfrm_selector sel; 349 struct xfrm_id id; 350 xfrm_address_t saddr; 351 struct xfrm_lifetime_cfg lft; 352 struct xfrm_lifetime_cur curlft; 353 struct xfrm_stats stats; 354 __u32 seq; 355 __u32 reqid; 356 __u16 family; 357 __u8 mode; /* XFRM_MODE_xxx */ 358 __u8 replay_window; 359 __u8 flags; 360 #define XFRM_STATE_NOECN 1 361 #define XFRM_STATE_DECAP_DSCP 2 362 #define XFRM_STATE_NOPMTUDISC 4 363 #define XFRM_STATE_WILDRECV 8 364 #define XFRM_STATE_ICMP 16 365 #define XFRM_STATE_AF_UNSPEC 32 366 #define XFRM_STATE_ALIGN4 64 367 #define XFRM_STATE_ESN 128 368 }; 369 370 struct xfrm_usersa_id { 371 xfrm_address_t daddr; 372 __be32 spi; 373 __u16 family; 374 __u8 proto; 375 }; 376 377 struct xfrm_aevent_id { 378 struct xfrm_usersa_id sa_id; 379 xfrm_address_t saddr; 380 __u32 flags; 381 __u32 reqid; 382 }; 383 384 struct xfrm_userspi_info { 385 struct xfrm_usersa_info info; 386 __u32 min; 387 __u32 max; 388 }; 389 390 struct xfrm_userpolicy_info { 391 struct xfrm_selector sel; 392 struct xfrm_lifetime_cfg lft; 393 struct xfrm_lifetime_cur curlft; 394 __u32 priority; 395 __u32 index; 396 __u8 dir; 397 __u8 action; 398 #define XFRM_POLICY_ALLOW 0 399 #define XFRM_POLICY_BLOCK 1 400 __u8 flags; 401 #define XFRM_POLICY_LOCALOK 1 /* Allow user to override global policy */ 402 /* Automatically expand selector to include matching ICMP payloads. */ 403 #define XFRM_POLICY_ICMP 2 404 __u8 share; 405 }; 406 407 struct xfrm_userpolicy_id { 408 struct xfrm_selector sel; 409 __u32 index; 410 __u8 dir; 411 }; 412 413 struct xfrm_user_acquire { 414 struct xfrm_id id; 415 xfrm_address_t saddr; 416 struct xfrm_selector sel; 417 struct xfrm_userpolicy_info policy; 418 __u32 aalgos; 419 __u32 ealgos; 420 __u32 calgos; 421 __u32 seq; 422 }; 423 424 struct xfrm_user_expire { 425 struct xfrm_usersa_info state; 426 __u8 hard; 427 }; 428 429 struct xfrm_user_polexpire { 430 struct xfrm_userpolicy_info pol; 431 __u8 hard; 432 }; 433 434 struct xfrm_usersa_flush { 435 __u8 proto; 436 }; 437 438 struct xfrm_user_report { 439 __u8 proto; 440 struct xfrm_selector sel; 441 }; 442 443 /* Used by MIGRATE to pass addresses IKE should use to perform 444 * SA negotiation with the peer */ 445 struct xfrm_user_kmaddress { 446 xfrm_address_t local; 447 xfrm_address_t remote; 448 __u32 reserved; 449 __u16 family; 450 }; 451 452 struct xfrm_user_migrate { 453 xfrm_address_t old_daddr; 454 xfrm_address_t old_saddr; 455 xfrm_address_t new_daddr; 456 xfrm_address_t new_saddr; 457 __u8 proto; 458 __u8 mode; 459 __u16 reserved; 460 __u32 reqid; 461 __u16 old_family; 462 __u16 new_family; 463 }; 464 465 struct xfrm_user_mapping { 466 struct xfrm_usersa_id id; 467 __u32 reqid; 468 xfrm_address_t old_saddr; 469 xfrm_address_t new_saddr; 470 __be16 old_sport; 471 __be16 new_sport; 472 }; 473 474 #ifndef __KERNEL__ 475 /* backwards compatibility for userspace */ 476 #define XFRMGRP_ACQUIRE 1 477 #define XFRMGRP_EXPIRE 2 478 #define XFRMGRP_SA 4 479 #define XFRMGRP_POLICY 8 480 #define XFRMGRP_REPORT 0x20 481 #endif 482 483 enum xfrm_nlgroups { 484 XFRMNLGRP_NONE, 485 #define XFRMNLGRP_NONE XFRMNLGRP_NONE 486 XFRMNLGRP_ACQUIRE, 487 #define XFRMNLGRP_ACQUIRE XFRMNLGRP_ACQUIRE 488 XFRMNLGRP_EXPIRE, 489 #define XFRMNLGRP_EXPIRE XFRMNLGRP_EXPIRE 490 XFRMNLGRP_SA, 491 #define XFRMNLGRP_SA XFRMNLGRP_SA 492 XFRMNLGRP_POLICY, 493 #define XFRMNLGRP_POLICY XFRMNLGRP_POLICY 494 XFRMNLGRP_AEVENTS, 495 #define XFRMNLGRP_AEVENTS XFRMNLGRP_AEVENTS 496 XFRMNLGRP_REPORT, 497 #define XFRMNLGRP_REPORT XFRMNLGRP_REPORT 498 XFRMNLGRP_MIGRATE, 499 #define XFRMNLGRP_MIGRATE XFRMNLGRP_MIGRATE 500 XFRMNLGRP_MAPPING, 501 #define XFRMNLGRP_MAPPING XFRMNLGRP_MAPPING 502 __XFRMNLGRP_MAX 503 }; 504 #define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1) 505 506 #endif /* _LINUX_XFRM_H */ 507