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