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 __XFRM_MSG_MAX 203 }; 204 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1) 205 206 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE) 207 208 /* 209 * Generic LSM security context for comunicating to user space 210 * NOTE: Same format as sadb_x_sec_ctx 211 */ 212 struct xfrm_user_sec_ctx { 213 __u16 len; 214 __u16 exttype; 215 __u8 ctx_alg; /* LSMs: e.g., selinux == 1 */ 216 __u8 ctx_doi; 217 __u16 ctx_len; 218 }; 219 220 struct xfrm_user_tmpl { 221 struct xfrm_id id; 222 __u16 family; 223 xfrm_address_t saddr; 224 __u32 reqid; 225 __u8 mode; 226 __u8 share; 227 __u8 optional; 228 __u32 aalgos; 229 __u32 ealgos; 230 __u32 calgos; 231 }; 232 233 struct xfrm_encap_tmpl { 234 __u16 encap_type; 235 __be16 encap_sport; 236 __be16 encap_dport; 237 xfrm_address_t encap_oa; 238 }; 239 240 /* AEVENT flags */ 241 enum xfrm_ae_ftype_t { 242 XFRM_AE_UNSPEC, 243 XFRM_AE_RTHR=1, /* replay threshold*/ 244 XFRM_AE_RVAL=2, /* replay value */ 245 XFRM_AE_LVAL=4, /* lifetime value */ 246 XFRM_AE_ETHR=8, /* expiry timer threshold */ 247 XFRM_AE_CR=16, /* Event cause is replay update */ 248 XFRM_AE_CE=32, /* Event cause is timer expiry */ 249 XFRM_AE_CU=64, /* Event cause is policy update */ 250 __XFRM_AE_MAX 251 252 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1) 253 }; 254 255 struct xfrm_userpolicy_type { 256 __u8 type; 257 __u16 reserved1; 258 __u8 reserved2; 259 }; 260 261 /* Netlink message attributes. */ 262 enum xfrm_attr_type_t { 263 XFRMA_UNSPEC, 264 XFRMA_ALG_AUTH, /* struct xfrm_algo */ 265 XFRMA_ALG_CRYPT, /* struct xfrm_algo */ 266 XFRMA_ALG_COMP, /* struct xfrm_algo */ 267 XFRMA_ENCAP, /* struct xfrm_algo + struct xfrm_encap_tmpl */ 268 XFRMA_TMPL, /* 1 or more struct xfrm_user_tmpl */ 269 XFRMA_SA, 270 XFRMA_POLICY, 271 XFRMA_SEC_CTX, /* struct xfrm_sec_ctx */ 272 XFRMA_LTIME_VAL, 273 XFRMA_REPLAY_VAL, 274 XFRMA_REPLAY_THRESH, 275 XFRMA_ETIMER_THRESH, 276 XFRMA_SRCADDR, /* xfrm_address_t */ 277 XFRMA_COADDR, /* xfrm_address_t */ 278 XFRMA_LASTUSED, 279 XFRMA_POLICY_TYPE, /* struct xfrm_userpolicy_type */ 280 XFRMA_MIGRATE, 281 XFRMA_ALG_AEAD, /* struct xfrm_algo_aead */ 282 __XFRMA_MAX 283 284 #define XFRMA_MAX (__XFRMA_MAX - 1) 285 }; 286 287 enum xfrm_sadattr_type_t { 288 XFRMA_SAD_UNSPEC, 289 XFRMA_SAD_CNT, 290 XFRMA_SAD_HINFO, 291 __XFRMA_SAD_MAX 292 293 #define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1) 294 }; 295 296 struct xfrmu_sadhinfo { 297 __u32 sadhcnt; /* current hash bkts */ 298 __u32 sadhmcnt; /* max allowed hash bkts */ 299 }; 300 301 enum xfrm_spdattr_type_t { 302 XFRMA_SPD_UNSPEC, 303 XFRMA_SPD_INFO, 304 XFRMA_SPD_HINFO, 305 __XFRMA_SPD_MAX 306 307 #define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1) 308 }; 309 310 struct xfrmu_spdinfo { 311 __u32 incnt; 312 __u32 outcnt; 313 __u32 fwdcnt; 314 __u32 inscnt; 315 __u32 outscnt; 316 __u32 fwdscnt; 317 }; 318 319 struct xfrmu_spdhinfo { 320 __u32 spdhcnt; 321 __u32 spdhmcnt; 322 }; 323 324 struct xfrm_usersa_info { 325 struct xfrm_selector sel; 326 struct xfrm_id id; 327 xfrm_address_t saddr; 328 struct xfrm_lifetime_cfg lft; 329 struct xfrm_lifetime_cur curlft; 330 struct xfrm_stats stats; 331 __u32 seq; 332 __u32 reqid; 333 __u16 family; 334 __u8 mode; /* XFRM_MODE_xxx */ 335 __u8 replay_window; 336 __u8 flags; 337 #define XFRM_STATE_NOECN 1 338 #define XFRM_STATE_DECAP_DSCP 2 339 #define XFRM_STATE_NOPMTUDISC 4 340 #define XFRM_STATE_WILDRECV 8 341 #define XFRM_STATE_ICMP 16 342 #define XFRM_STATE_AF_UNSPEC 32 343 }; 344 345 struct xfrm_usersa_id { 346 xfrm_address_t daddr; 347 __be32 spi; 348 __u16 family; 349 __u8 proto; 350 }; 351 352 struct xfrm_aevent_id { 353 struct xfrm_usersa_id sa_id; 354 xfrm_address_t saddr; 355 __u32 flags; 356 __u32 reqid; 357 }; 358 359 struct xfrm_userspi_info { 360 struct xfrm_usersa_info info; 361 __u32 min; 362 __u32 max; 363 }; 364 365 struct xfrm_userpolicy_info { 366 struct xfrm_selector sel; 367 struct xfrm_lifetime_cfg lft; 368 struct xfrm_lifetime_cur curlft; 369 __u32 priority; 370 __u32 index; 371 __u8 dir; 372 __u8 action; 373 #define XFRM_POLICY_ALLOW 0 374 #define XFRM_POLICY_BLOCK 1 375 __u8 flags; 376 #define XFRM_POLICY_LOCALOK 1 /* Allow user to override global policy */ 377 /* Automatically expand selector to include matching ICMP payloads. */ 378 #define XFRM_POLICY_ICMP 2 379 __u8 share; 380 }; 381 382 struct xfrm_userpolicy_id { 383 struct xfrm_selector sel; 384 __u32 index; 385 __u8 dir; 386 }; 387 388 struct xfrm_user_acquire { 389 struct xfrm_id id; 390 xfrm_address_t saddr; 391 struct xfrm_selector sel; 392 struct xfrm_userpolicy_info policy; 393 __u32 aalgos; 394 __u32 ealgos; 395 __u32 calgos; 396 __u32 seq; 397 }; 398 399 struct xfrm_user_expire { 400 struct xfrm_usersa_info state; 401 __u8 hard; 402 }; 403 404 struct xfrm_user_polexpire { 405 struct xfrm_userpolicy_info pol; 406 __u8 hard; 407 }; 408 409 struct xfrm_usersa_flush { 410 __u8 proto; 411 }; 412 413 struct xfrm_user_report { 414 __u8 proto; 415 struct xfrm_selector sel; 416 }; 417 418 struct xfrm_user_migrate { 419 xfrm_address_t old_daddr; 420 xfrm_address_t old_saddr; 421 xfrm_address_t new_daddr; 422 xfrm_address_t new_saddr; 423 __u8 proto; 424 __u8 mode; 425 __u16 reserved; 426 __u32 reqid; 427 __u16 old_family; 428 __u16 new_family; 429 }; 430 431 /* backwards compatibility for userspace */ 432 #define XFRMGRP_ACQUIRE 1 433 #define XFRMGRP_EXPIRE 2 434 #define XFRMGRP_SA 4 435 #define XFRMGRP_POLICY 8 436 #define XFRMGRP_REPORT 0x20 437 438 enum xfrm_nlgroups { 439 XFRMNLGRP_NONE, 440 #define XFRMNLGRP_NONE XFRMNLGRP_NONE 441 XFRMNLGRP_ACQUIRE, 442 #define XFRMNLGRP_ACQUIRE XFRMNLGRP_ACQUIRE 443 XFRMNLGRP_EXPIRE, 444 #define XFRMNLGRP_EXPIRE XFRMNLGRP_EXPIRE 445 XFRMNLGRP_SA, 446 #define XFRMNLGRP_SA XFRMNLGRP_SA 447 XFRMNLGRP_POLICY, 448 #define XFRMNLGRP_POLICY XFRMNLGRP_POLICY 449 XFRMNLGRP_AEVENTS, 450 #define XFRMNLGRP_AEVENTS XFRMNLGRP_AEVENTS 451 XFRMNLGRP_REPORT, 452 #define XFRMNLGRP_REPORT XFRMNLGRP_REPORT 453 XFRMNLGRP_MIGRATE, 454 #define XFRMNLGRP_MIGRATE XFRMNLGRP_MIGRATE 455 __XFRMNLGRP_MAX 456 }; 457 #define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1) 458 459 #endif /* _LINUX_XFRM_H */ 460