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 struct xfrm_algo { 88 char alg_name[64]; 89 unsigned int alg_key_len; /* in bits */ 90 char alg_key[0]; 91 }; 92 93 struct xfrm_algo_auth { 94 char alg_name[64]; 95 unsigned int alg_key_len; /* in bits */ 96 unsigned int alg_trunc_len; /* in bits */ 97 char alg_key[0]; 98 }; 99 100 struct xfrm_algo_aead { 101 char alg_name[64]; 102 unsigned int alg_key_len; /* in bits */ 103 unsigned int alg_icv_len; /* in bits */ 104 char alg_key[0]; 105 }; 106 107 struct xfrm_stats { 108 __u32 replay_window; 109 __u32 replay; 110 __u32 integrity_failed; 111 }; 112 113 enum { 114 XFRM_POLICY_TYPE_MAIN = 0, 115 XFRM_POLICY_TYPE_SUB = 1, 116 XFRM_POLICY_TYPE_MAX = 2, 117 XFRM_POLICY_TYPE_ANY = 255 118 }; 119 120 enum { 121 XFRM_POLICY_IN = 0, 122 XFRM_POLICY_OUT = 1, 123 XFRM_POLICY_FWD = 2, 124 XFRM_POLICY_MASK = 3, 125 XFRM_POLICY_MAX = 3 126 }; 127 128 enum { 129 XFRM_SHARE_ANY, /* No limitations */ 130 XFRM_SHARE_SESSION, /* For this session only */ 131 XFRM_SHARE_USER, /* For this user only */ 132 XFRM_SHARE_UNIQUE /* Use once */ 133 }; 134 135 #define XFRM_MODE_TRANSPORT 0 136 #define XFRM_MODE_TUNNEL 1 137 #define XFRM_MODE_ROUTEOPTIMIZATION 2 138 #define XFRM_MODE_IN_TRIGGER 3 139 #define XFRM_MODE_BEET 4 140 #define XFRM_MODE_MAX 5 141 142 /* Netlink configuration messages. */ 143 enum { 144 XFRM_MSG_BASE = 0x10, 145 146 XFRM_MSG_NEWSA = 0x10, 147 #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA 148 XFRM_MSG_DELSA, 149 #define XFRM_MSG_DELSA XFRM_MSG_DELSA 150 XFRM_MSG_GETSA, 151 #define XFRM_MSG_GETSA XFRM_MSG_GETSA 152 153 XFRM_MSG_NEWPOLICY, 154 #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY 155 XFRM_MSG_DELPOLICY, 156 #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY 157 XFRM_MSG_GETPOLICY, 158 #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY 159 160 XFRM_MSG_ALLOCSPI, 161 #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI 162 XFRM_MSG_ACQUIRE, 163 #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE 164 XFRM_MSG_EXPIRE, 165 #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE 166 167 XFRM_MSG_UPDPOLICY, 168 #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY 169 XFRM_MSG_UPDSA, 170 #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA 171 172 XFRM_MSG_POLEXPIRE, 173 #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE 174 175 XFRM_MSG_FLUSHSA, 176 #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA 177 XFRM_MSG_FLUSHPOLICY, 178 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY 179 180 XFRM_MSG_NEWAE, 181 #define XFRM_MSG_NEWAE XFRM_MSG_NEWAE 182 XFRM_MSG_GETAE, 183 #define XFRM_MSG_GETAE XFRM_MSG_GETAE 184 185 XFRM_MSG_REPORT, 186 #define XFRM_MSG_REPORT XFRM_MSG_REPORT 187 188 XFRM_MSG_MIGRATE, 189 #define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE 190 191 XFRM_MSG_NEWSADINFO, 192 #define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO 193 XFRM_MSG_GETSADINFO, 194 #define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO 195 196 XFRM_MSG_NEWSPDINFO, 197 #define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO 198 XFRM_MSG_GETSPDINFO, 199 #define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO 200 201 XFRM_MSG_MAPPING, 202 #define XFRM_MSG_MAPPING XFRM_MSG_MAPPING 203 __XFRM_MSG_MAX 204 }; 205 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1) 206 207 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE) 208 209 /* 210 * Generic LSM security context for comunicating to user space 211 * NOTE: Same format as sadb_x_sec_ctx 212 */ 213 struct xfrm_user_sec_ctx { 214 __u16 len; 215 __u16 exttype; 216 __u8 ctx_alg; /* LSMs: e.g., selinux == 1 */ 217 __u8 ctx_doi; 218 __u16 ctx_len; 219 }; 220 221 struct xfrm_user_tmpl { 222 struct xfrm_id id; 223 __u16 family; 224 xfrm_address_t saddr; 225 __u32 reqid; 226 __u8 mode; 227 __u8 share; 228 __u8 optional; 229 __u32 aalgos; 230 __u32 ealgos; 231 __u32 calgos; 232 }; 233 234 struct xfrm_encap_tmpl { 235 __u16 encap_type; 236 __be16 encap_sport; 237 __be16 encap_dport; 238 xfrm_address_t encap_oa; 239 }; 240 241 /* AEVENT flags */ 242 enum xfrm_ae_ftype_t { 243 XFRM_AE_UNSPEC, 244 XFRM_AE_RTHR=1, /* replay threshold*/ 245 XFRM_AE_RVAL=2, /* replay value */ 246 XFRM_AE_LVAL=4, /* lifetime value */ 247 XFRM_AE_ETHR=8, /* expiry timer threshold */ 248 XFRM_AE_CR=16, /* Event cause is replay update */ 249 XFRM_AE_CE=32, /* Event cause is timer expiry */ 250 XFRM_AE_CU=64, /* Event cause is policy update */ 251 __XFRM_AE_MAX 252 253 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1) 254 }; 255 256 struct xfrm_userpolicy_type { 257 __u8 type; 258 __u16 reserved1; 259 __u8 reserved2; 260 }; 261 262 /* Netlink message attributes. */ 263 enum xfrm_attr_type_t { 264 XFRMA_UNSPEC, 265 XFRMA_ALG_AUTH, /* struct xfrm_algo */ 266 XFRMA_ALG_CRYPT, /* struct xfrm_algo */ 267 XFRMA_ALG_COMP, /* struct xfrm_algo */ 268 XFRMA_ENCAP, /* struct xfrm_algo + struct xfrm_encap_tmpl */ 269 XFRMA_TMPL, /* 1 or more struct xfrm_user_tmpl */ 270 XFRMA_SA, /* struct xfrm_usersa_info */ 271 XFRMA_POLICY, /*struct xfrm_userpolicy_info */ 272 XFRMA_SEC_CTX, /* struct xfrm_sec_ctx */ 273 XFRMA_LTIME_VAL, 274 XFRMA_REPLAY_VAL, 275 XFRMA_REPLAY_THRESH, 276 XFRMA_ETIMER_THRESH, 277 XFRMA_SRCADDR, /* xfrm_address_t */ 278 XFRMA_COADDR, /* xfrm_address_t */ 279 XFRMA_LASTUSED, /* unsigned long */ 280 XFRMA_POLICY_TYPE, /* struct xfrm_userpolicy_type */ 281 XFRMA_MIGRATE, 282 XFRMA_ALG_AEAD, /* struct xfrm_algo_aead */ 283 XFRMA_KMADDRESS, /* struct xfrm_user_kmaddress */ 284 XFRMA_ALG_AUTH_TRUNC, /* struct xfrm_algo_auth */ 285 XFRMA_MARK, /* struct xfrm_mark */ 286 __XFRMA_MAX 287 288 #define XFRMA_MAX (__XFRMA_MAX - 1) 289 }; 290 291 struct xfrm_mark { 292 __u32 v; /* value */ 293 __u32 m; /* mask */ 294 }; 295 296 enum xfrm_sadattr_type_t { 297 XFRMA_SAD_UNSPEC, 298 XFRMA_SAD_CNT, 299 XFRMA_SAD_HINFO, 300 __XFRMA_SAD_MAX 301 302 #define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1) 303 }; 304 305 struct xfrmu_sadhinfo { 306 __u32 sadhcnt; /* current hash bkts */ 307 __u32 sadhmcnt; /* max allowed hash bkts */ 308 }; 309 310 enum xfrm_spdattr_type_t { 311 XFRMA_SPD_UNSPEC, 312 XFRMA_SPD_INFO, 313 XFRMA_SPD_HINFO, 314 __XFRMA_SPD_MAX 315 316 #define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1) 317 }; 318 319 struct xfrmu_spdinfo { 320 __u32 incnt; 321 __u32 outcnt; 322 __u32 fwdcnt; 323 __u32 inscnt; 324 __u32 outscnt; 325 __u32 fwdscnt; 326 }; 327 328 struct xfrmu_spdhinfo { 329 __u32 spdhcnt; 330 __u32 spdhmcnt; 331 }; 332 333 struct xfrm_usersa_info { 334 struct xfrm_selector sel; 335 struct xfrm_id id; 336 xfrm_address_t saddr; 337 struct xfrm_lifetime_cfg lft; 338 struct xfrm_lifetime_cur curlft; 339 struct xfrm_stats stats; 340 __u32 seq; 341 __u32 reqid; 342 __u16 family; 343 __u8 mode; /* XFRM_MODE_xxx */ 344 __u8 replay_window; 345 __u8 flags; 346 #define XFRM_STATE_NOECN 1 347 #define XFRM_STATE_DECAP_DSCP 2 348 #define XFRM_STATE_NOPMTUDISC 4 349 #define XFRM_STATE_WILDRECV 8 350 #define XFRM_STATE_ICMP 16 351 #define XFRM_STATE_AF_UNSPEC 32 352 }; 353 354 struct xfrm_usersa_id { 355 xfrm_address_t daddr; 356 __be32 spi; 357 __u16 family; 358 __u8 proto; 359 }; 360 361 struct xfrm_aevent_id { 362 struct xfrm_usersa_id sa_id; 363 xfrm_address_t saddr; 364 __u32 flags; 365 __u32 reqid; 366 }; 367 368 struct xfrm_userspi_info { 369 struct xfrm_usersa_info info; 370 __u32 min; 371 __u32 max; 372 }; 373 374 struct xfrm_userpolicy_info { 375 struct xfrm_selector sel; 376 struct xfrm_lifetime_cfg lft; 377 struct xfrm_lifetime_cur curlft; 378 __u32 priority; 379 __u32 index; 380 __u8 dir; 381 __u8 action; 382 #define XFRM_POLICY_ALLOW 0 383 #define XFRM_POLICY_BLOCK 1 384 __u8 flags; 385 #define XFRM_POLICY_LOCALOK 1 /* Allow user to override global policy */ 386 /* Automatically expand selector to include matching ICMP payloads. */ 387 #define XFRM_POLICY_ICMP 2 388 __u8 share; 389 }; 390 391 struct xfrm_userpolicy_id { 392 struct xfrm_selector sel; 393 __u32 index; 394 __u8 dir; 395 }; 396 397 struct xfrm_user_acquire { 398 struct xfrm_id id; 399 xfrm_address_t saddr; 400 struct xfrm_selector sel; 401 struct xfrm_userpolicy_info policy; 402 __u32 aalgos; 403 __u32 ealgos; 404 __u32 calgos; 405 __u32 seq; 406 }; 407 408 struct xfrm_user_expire { 409 struct xfrm_usersa_info state; 410 __u8 hard; 411 }; 412 413 struct xfrm_user_polexpire { 414 struct xfrm_userpolicy_info pol; 415 __u8 hard; 416 }; 417 418 struct xfrm_usersa_flush { 419 __u8 proto; 420 }; 421 422 struct xfrm_user_report { 423 __u8 proto; 424 struct xfrm_selector sel; 425 }; 426 427 /* Used by MIGRATE to pass addresses IKE should use to perform 428 * SA negotiation with the peer */ 429 struct xfrm_user_kmaddress { 430 xfrm_address_t local; 431 xfrm_address_t remote; 432 __u32 reserved; 433 __u16 family; 434 }; 435 436 struct xfrm_user_migrate { 437 xfrm_address_t old_daddr; 438 xfrm_address_t old_saddr; 439 xfrm_address_t new_daddr; 440 xfrm_address_t new_saddr; 441 __u8 proto; 442 __u8 mode; 443 __u16 reserved; 444 __u32 reqid; 445 __u16 old_family; 446 __u16 new_family; 447 }; 448 449 struct xfrm_user_mapping { 450 struct xfrm_usersa_id id; 451 __u32 reqid; 452 xfrm_address_t old_saddr; 453 xfrm_address_t new_saddr; 454 __be16 old_sport; 455 __be16 new_sport; 456 }; 457 458 /* backwards compatibility for userspace */ 459 #define XFRMGRP_ACQUIRE 1 460 #define XFRMGRP_EXPIRE 2 461 #define XFRMGRP_SA 4 462 #define XFRMGRP_POLICY 8 463 #define XFRMGRP_REPORT 0x20 464 465 enum xfrm_nlgroups { 466 XFRMNLGRP_NONE, 467 #define XFRMNLGRP_NONE XFRMNLGRP_NONE 468 XFRMNLGRP_ACQUIRE, 469 #define XFRMNLGRP_ACQUIRE XFRMNLGRP_ACQUIRE 470 XFRMNLGRP_EXPIRE, 471 #define XFRMNLGRP_EXPIRE XFRMNLGRP_EXPIRE 472 XFRMNLGRP_SA, 473 #define XFRMNLGRP_SA XFRMNLGRP_SA 474 XFRMNLGRP_POLICY, 475 #define XFRMNLGRP_POLICY XFRMNLGRP_POLICY 476 XFRMNLGRP_AEVENTS, 477 #define XFRMNLGRP_AEVENTS XFRMNLGRP_AEVENTS 478 XFRMNLGRP_REPORT, 479 #define XFRMNLGRP_REPORT XFRMNLGRP_REPORT 480 XFRMNLGRP_MIGRATE, 481 #define XFRMNLGRP_MIGRATE XFRMNLGRP_MIGRATE 482 XFRMNLGRP_MAPPING, 483 #define XFRMNLGRP_MAPPING XFRMNLGRP_MAPPING 484 __XFRMNLGRP_MAX 485 }; 486 #define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1) 487 488 #endif /* _LINUX_XFRM_H */ 489