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 */ 13typedef 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 */ 22struct xfrm_id { 23 xfrm_address_t daddr; 24 __be32 spi; 25 __u8 proto; 26}; 27 28struct 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 46struct 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 63struct 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 74struct xfrm_lifetime_cur { 75 __u64 bytes; 76 __u64 packets; 77 __u64 add_time; 78 __u64 use_time; 79}; 80 81struct xfrm_replay_state { 82 __u32 oseq; 83 __u32 seq; 84 __u32 bitmap; 85}; 86 87struct xfrm_algo { 88 char alg_name[64]; 89 unsigned int alg_key_len; /* in bits */ 90 char alg_key[0]; 91}; 92 93struct 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 100struct 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 107struct xfrm_stats { 108 __u32 replay_window; 109 __u32 replay; 110 __u32 integrity_failed; 111}; 112 113enum { 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 120enum { 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 128enum { 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. */ 143enum { 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 */ 213struct 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 221struct 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 234struct 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 */ 242enum 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 256struct xfrm_userpolicy_type { 257 __u8 type; 258 __u16 reserved1; 259 __u8 reserved2; 260}; 261 262/* Netlink message attributes. */ 263enum 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 291struct xfrm_mark { 292 __u32 v; /* value */ 293 __u32 m; /* mask */ 294}; 295 296enum 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 305struct xfrmu_sadhinfo { 306 __u32 sadhcnt; /* current hash bkts */ 307 __u32 sadhmcnt; /* max allowed hash bkts */ 308}; 309 310enum 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 319struct xfrmu_spdinfo { 320 __u32 incnt; 321 __u32 outcnt; 322 __u32 fwdcnt; 323 __u32 inscnt; 324 __u32 outscnt; 325 __u32 fwdscnt; 326}; 327 328struct xfrmu_spdhinfo { 329 __u32 spdhcnt; 330 __u32 spdhmcnt; 331}; 332 333struct 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 354struct xfrm_usersa_id { 355 xfrm_address_t daddr; 356 __be32 spi; 357 __u16 family; 358 __u8 proto; 359}; 360 361struct xfrm_aevent_id { 362 struct xfrm_usersa_id sa_id; 363 xfrm_address_t saddr; 364 __u32 flags; 365 __u32 reqid; 366}; 367 368struct xfrm_userspi_info { 369 struct xfrm_usersa_info info; 370 __u32 min; 371 __u32 max; 372}; 373 374struct 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 391struct xfrm_userpolicy_id { 392 struct xfrm_selector sel; 393 __u32 index; 394 __u8 dir; 395}; 396 397struct 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 408struct xfrm_user_expire { 409 struct xfrm_usersa_info state; 410 __u8 hard; 411}; 412 413struct xfrm_user_polexpire { 414 struct xfrm_userpolicy_info pol; 415 __u8 hard; 416}; 417 418struct xfrm_usersa_flush { 419 __u8 proto; 420}; 421 422struct 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 */ 429struct xfrm_user_kmaddress { 430 xfrm_address_t local; 431 xfrm_address_t remote; 432 __u32 reserved; 433 __u16 family; 434}; 435 436struct 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 449struct 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 465enum 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