include/uapi/linux/xfrm.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 #ifndef _LINUX_XFRM_H
   3 #define _LINUX_XFRM_H
   4
   5 #include <linux/in6.h>
   6 #include <linux/types.h>
   7 #include <linux/stddef.h>
   8
   9 /* All of the structures in this file may not change size as they are
  10  * passed into the kernel from userspace via netlink sockets.
  11  */
  12
  13 /* Structure to encapsulate addresses. I do not want to use
  14  * "standard" structure. My apologies.
  15  */
  16 typedef union {
  17         __be32          a4;
  18         __be32          a6[4];
  19         struct in6_addr in6;
  20 } xfrm_address_t;
  21
  22 /* Ident of a specific xfrm_state. It is used on input to lookup
  23  * the state by (spi,daddr,ah/esp) or to store information about
  24  * spi, protocol and tunnel address on output.
  25  */
  26 struct xfrm_id {
  27         xfrm_address_t  daddr;
  28         __be32          spi;
  29         __u8            proto;
  30 };
  31
  32 struct xfrm_sec_ctx {
  33         __u8    ctx_doi;
  34         __u8    ctx_alg;
  35         __u16   ctx_len;
  36         __u32   ctx_sid;
  37         char    ctx_str[] __counted_by(ctx_len);
  38 };
  39
  40 /* Security Context Domains of Interpretation */
  41 #define XFRM_SC_DOI_RESERVED 0
  42 #define XFRM_SC_DOI_LSM 1
  43
  44 /* Security Context Algorithms */
  45 #define XFRM_SC_ALG_RESERVED 0
  46 #define XFRM_SC_ALG_SELINUX 1
  47
  48 /* Selector, used as selector both on policy rules (SPD) and SAs. */
  49
  50 struct xfrm_selector {
  51         xfrm_address_t  daddr;
  52         xfrm_address_t  saddr;
  53         __be16  dport;
  54         __be16  dport_mask;
  55         __be16  sport;
  56         __be16  sport_mask;
  57         __u16   family;
  58         __u8    prefixlen_d;
  59         __u8    prefixlen_s;
  60         __u8    proto;
  61         int     ifindex;
  62         __kernel_uid32_t        user;
  63 };
  64
  65 #define XFRM_INF (~(__u64)0)
  66
  67 struct xfrm_lifetime_cfg {
  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         __u64   bytes;
  80         __u64   packets;
  81         __u64   add_time;
  82         __u64   use_time;
  83 };
  84
  85 struct xfrm_replay_state {
  86         __u32   oseq;
  87         __u32   seq;
  88         __u32   bitmap;
  89 };
  90
  91 #define XFRMA_REPLAY_ESN_MAX    4096
  92
  93 struct xfrm_replay_state_esn {
  94         unsigned int    bmp_len;
  95         __u32           oseq;
  96         __u32           seq;
  97         __u32           oseq_hi;
  98         __u32           seq_hi;
  99         __u32           replay_window;
 100         __u32           bmp[];
 101 };
 102
 103 struct xfrm_algo {
 104         char            alg_name[64];
 105         unsigned int    alg_key_len;    /* in bits */
 106         char            alg_key[];
 107 };
 108
 109 struct xfrm_algo_auth {
 110         char            alg_name[64];
 111         unsigned int    alg_key_len;    /* in bits */
 112         unsigned int    alg_trunc_len;  /* in bits */
 113         char            alg_key[];
 114 };
 115
 116 struct xfrm_algo_aead {
 117         char            alg_name[64];
 118         unsigned int    alg_key_len;    /* in bits */
 119         unsigned int    alg_icv_len;    /* in bits */
 120         char            alg_key[];
 121 };
 122
 123 struct xfrm_stats {
 124         __u32   replay_window;
 125         __u32   replay;
 126         __u32   integrity_failed;
 127 };
 128
 129 enum {
 130         XFRM_POLICY_TYPE_MAIN   = 0,
 131         XFRM_POLICY_TYPE_SUB    = 1,
 132         XFRM_POLICY_TYPE_MAX    = 2,
 133         XFRM_POLICY_TYPE_ANY    = 255
 134 };
 135
 136 enum {
 137         XFRM_POLICY_IN  = 0,
 138         XFRM_POLICY_OUT = 1,
 139         XFRM_POLICY_FWD = 2,
 140         XFRM_POLICY_MASK = 3,
 141         XFRM_POLICY_MAX = 3
 142 };
 143
 144 enum xfrm_sa_dir {
 145         XFRM_SA_DIR_IN  = 1,
 146         XFRM_SA_DIR_OUT = 2
 147 };
 148
 149 enum {
 150         XFRM_SHARE_ANY,         /* No limitations */
 151         XFRM_SHARE_SESSION,     /* For this session only */
 152         XFRM_SHARE_USER,        /* For this user only */
 153         XFRM_SHARE_UNIQUE       /* Use once */
 154 };
 155
 156 #define XFRM_MODE_TRANSPORT 0
 157 #define XFRM_MODE_TUNNEL 1
 158 #define XFRM_MODE_ROUTEOPTIMIZATION 2
 159 #define XFRM_MODE_IN_TRIGGER 3
 160 #define XFRM_MODE_BEET 4
 161 #define XFRM_MODE_MAX 5
 162
 163 /* Netlink configuration messages.  */
 164 enum {
 165         XFRM_MSG_BASE = 0x10,
 166
 167         XFRM_MSG_NEWSA = 0x10,
 168 #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA
 169         XFRM_MSG_DELSA,
 170 #define XFRM_MSG_DELSA XFRM_MSG_DELSA
 171         XFRM_MSG_GETSA,
 172 #define XFRM_MSG_GETSA XFRM_MSG_GETSA
 173
 174         XFRM_MSG_NEWPOLICY,
 175 #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY
 176         XFRM_MSG_DELPOLICY,
 177 #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY
 178         XFRM_MSG_GETPOLICY,
 179 #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY
 180
 181         XFRM_MSG_ALLOCSPI,
 182 #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI
 183         XFRM_MSG_ACQUIRE,
 184 #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE
 185         XFRM_MSG_EXPIRE,
 186 #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE
 187
 188         XFRM_MSG_UPDPOLICY,
 189 #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY
 190         XFRM_MSG_UPDSA,
 191 #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA
 192
 193         XFRM_MSG_POLEXPIRE,
 194 #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE
 195
 196         XFRM_MSG_FLUSHSA,
 197 #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA
 198         XFRM_MSG_FLUSHPOLICY,
 199 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
 200
 201         XFRM_MSG_NEWAE,
 202 #define XFRM_MSG_NEWAE XFRM_MSG_NEWAE
 203         XFRM_MSG_GETAE,
 204 #define XFRM_MSG_GETAE XFRM_MSG_GETAE
 205
 206         XFRM_MSG_REPORT,
 207 #define XFRM_MSG_REPORT XFRM_MSG_REPORT
 208
 209         XFRM_MSG_MIGRATE,
 210 #define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE
 211
 212         XFRM_MSG_NEWSADINFO,
 213 #define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO
 214         XFRM_MSG_GETSADINFO,
 215 #define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO
 216
 217         XFRM_MSG_NEWSPDINFO,
 218 #define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO
 219         XFRM_MSG_GETSPDINFO,
 220 #define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO
 221
 222         XFRM_MSG_MAPPING,
 223 #define XFRM_MSG_MAPPING XFRM_MSG_MAPPING
 224
 225         XFRM_MSG_SETDEFAULT,
 226 #define XFRM_MSG_SETDEFAULT XFRM_MSG_SETDEFAULT
 227         XFRM_MSG_GETDEFAULT,
 228 #define XFRM_MSG_GETDEFAULT XFRM_MSG_GETDEFAULT
 229         __XFRM_MSG_MAX
 230 };
 231 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
 232
 233 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
 234
 235 /*
 236  * Generic LSM security context for communicating to user space
 237  * NOTE: Same format as sadb_x_sec_ctx
 238  */
 239 struct xfrm_user_sec_ctx {
 240         __u16                   len;
 241         __u16                   exttype;
 242         __u8                    ctx_alg;  /* LSMs: e.g., selinux == 1 */
 243         __u8                    ctx_doi;
 244         __u16                   ctx_len;
 245 };
 246
 247 struct xfrm_user_tmpl {
 248         struct xfrm_id          id;
 249         __u16                   family;
 250         xfrm_address_t          saddr;
 251         __u32                   reqid;
 252         __u8                    mode;
 253         __u8                    share;
 254         __u8                    optional;
 255         __u32                   aalgos;
 256         __u32                   ealgos;
 257         __u32                   calgos;
 258 };
 259
 260 struct xfrm_encap_tmpl {
 261         __u16           encap_type;
 262         __be16          encap_sport;
 263         __be16          encap_dport;
 264         xfrm_address_t  encap_oa;
 265 };
 266
 267 /* AEVENT flags  */
 268 enum xfrm_ae_ftype_t {
 269         XFRM_AE_UNSPEC,
 270         XFRM_AE_RTHR=1, /* replay threshold*/
 271         XFRM_AE_RVAL=2, /* replay value */
 272         XFRM_AE_LVAL=4, /* lifetime value */
 273         XFRM_AE_ETHR=8, /* expiry timer threshold */
 274         XFRM_AE_CR=16, /* Event cause is replay update */
 275         XFRM_AE_CE=32, /* Event cause is timer expiry */
 276         XFRM_AE_CU=64, /* Event cause is policy update */
 277         __XFRM_AE_MAX
 278
 279 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1)
 280 };
 281
 282 struct xfrm_userpolicy_type {
 283         __u8            type;
 284         __u16           reserved1;
 285         __u8            reserved2;
 286 };
 287
 288 /* Netlink message attributes.  */
 289 enum xfrm_attr_type_t {
 290         XFRMA_UNSPEC,
 291         XFRMA_ALG_AUTH,         /* struct xfrm_algo */
 292         XFRMA_ALG_CRYPT,        /* struct xfrm_algo */
 293         XFRMA_ALG_COMP,         /* struct xfrm_algo */
 294         XFRMA_ENCAP,            /* struct xfrm_algo + struct xfrm_encap_tmpl */
 295         XFRMA_TMPL,             /* 1 or more struct xfrm_user_tmpl */
 296         XFRMA_SA,               /* struct xfrm_usersa_info  */
 297         XFRMA_POLICY,           /*struct xfrm_userpolicy_info */
 298         XFRMA_SEC_CTX,          /* struct xfrm_sec_ctx */
 299         XFRMA_LTIME_VAL,
 300         XFRMA_REPLAY_VAL,
 301         XFRMA_REPLAY_THRESH,
 302         XFRMA_ETIMER_THRESH,
 303         XFRMA_SRCADDR,          /* xfrm_address_t */
 304         XFRMA_COADDR,           /* xfrm_address_t */
 305         XFRMA_LASTUSED,         /* __u64 */
 306         XFRMA_POLICY_TYPE,      /* struct xfrm_userpolicy_type */
 307         XFRMA_MIGRATE,
 308         XFRMA_ALG_AEAD,         /* struct xfrm_algo_aead */
 309         XFRMA_KMADDRESS,        /* struct xfrm_user_kmaddress */
 310         XFRMA_ALG_AUTH_TRUNC,   /* struct xfrm_algo_auth */
 311         XFRMA_MARK,             /* struct xfrm_mark */
 312         XFRMA_TFCPAD,           /* __u32 */
 313         XFRMA_REPLAY_ESN_VAL,   /* struct xfrm_replay_state_esn */
 314         XFRMA_SA_EXTRA_FLAGS,   /* __u32 */
 315         XFRMA_PROTO,            /* __u8 */
 316         XFRMA_ADDRESS_FILTER,   /* struct xfrm_address_filter */
 317         XFRMA_PAD,
 318         XFRMA_OFFLOAD_DEV,      /* struct xfrm_user_offload */
 319         XFRMA_SET_MARK,         /* __u32 */
 320         XFRMA_SET_MARK_MASK,    /* __u32 */
 321         XFRMA_IF_ID,            /* __u32 */
 322         XFRMA_MTIMER_THRESH,    /* __u32 in seconds for input SA */
 323         XFRMA_SA_DIR,           /* __u8 */
 324         XFRMA_NAT_KEEPALIVE_INTERVAL,   /* __u32 in seconds for NAT keepalive */
 325         XFRMA_SA_PCPU,          /* __u32 */
 326         __XFRMA_MAX
 327
 328 #define XFRMA_OUTPUT_MARK XFRMA_SET_MARK        /* Compatibility */
 329 #define XFRMA_MAX (__XFRMA_MAX - 1)
 330 };
 331
 332 struct xfrm_mark {
 333         __u32           v; /* value */
 334         __u32           m; /* mask */
 335 };
 336
 337 enum xfrm_sadattr_type_t {
 338         XFRMA_SAD_UNSPEC,
 339         XFRMA_SAD_CNT,
 340         XFRMA_SAD_HINFO,
 341         __XFRMA_SAD_MAX
 342
 343 #define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1)
 344 };
 345
 346 struct xfrmu_sadhinfo {
 347         __u32 sadhcnt; /* current hash bkts */
 348         __u32 sadhmcnt; /* max allowed hash bkts */
 349 };
 350
 351 enum xfrm_spdattr_type_t {
 352         XFRMA_SPD_UNSPEC,
 353         XFRMA_SPD_INFO,
 354         XFRMA_SPD_HINFO,
 355         XFRMA_SPD_IPV4_HTHRESH,
 356         XFRMA_SPD_IPV6_HTHRESH,
 357         __XFRMA_SPD_MAX
 358
 359 #define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1)
 360 };
 361
 362 struct xfrmu_spdinfo {
 363         __u32 incnt;
 364         __u32 outcnt;
 365         __u32 fwdcnt;
 366         __u32 inscnt;
 367         __u32 outscnt;
 368         __u32 fwdscnt;
 369 };
 370
 371 struct xfrmu_spdhinfo {
 372         __u32 spdhcnt;
 373         __u32 spdhmcnt;
 374 };
 375
 376 struct xfrmu_spdhthresh {
 377         __u8 lbits;
 378         __u8 rbits;
 379 };
 380
 381 struct xfrm_usersa_info {
 382         struct xfrm_selector            sel;
 383         struct xfrm_id                  id;
 384         xfrm_address_t                  saddr;
 385         struct xfrm_lifetime_cfg        lft;
 386         struct xfrm_lifetime_cur        curlft;
 387         struct xfrm_stats               stats;
 388         __u32                           seq;
 389         __u32                           reqid;
 390         __u16                           family;
 391         __u8                            mode;           /* XFRM_MODE_xxx */
 392         __u8                            replay_window;
 393         __u8                            flags;
 394 #define XFRM_STATE_NOECN        1
 395 #define XFRM_STATE_DECAP_DSCP   2
 396 #define XFRM_STATE_NOPMTUDISC   4
 397 #define XFRM_STATE_WILDRECV     8
 398 #define XFRM_STATE_ICMP         16
 399 #define XFRM_STATE_AF_UNSPEC    32
 400 #define XFRM_STATE_ALIGN4       64
 401 #define XFRM_STATE_ESN          128
 402 };
 403
 404 #define XFRM_SA_XFLAG_DONT_ENCAP_DSCP   1
 405 #define XFRM_SA_XFLAG_OSEQ_MAY_WRAP     2
 406
 407 struct xfrm_usersa_id {
 408         xfrm_address_t                  daddr;
 409         __be32                          spi;
 410         __u16                           family;
 411         __u8                            proto;
 412 };
 413
 414 struct xfrm_aevent_id {
 415         struct xfrm_usersa_id           sa_id;
 416         xfrm_address_t                  saddr;
 417         __u32                           flags;
 418         __u32                           reqid;
 419 };
 420
 421 struct xfrm_userspi_info {
 422         struct xfrm_usersa_info         info;
 423         __u32                           min;
 424         __u32                           max;
 425 };
 426
 427 struct xfrm_userpolicy_info {
 428         struct xfrm_selector            sel;
 429         struct xfrm_lifetime_cfg        lft;
 430         struct xfrm_lifetime_cur        curlft;
 431         __u32                           priority;
 432         __u32                           index;
 433         __u8                            dir;
 434         __u8                            action;
 435 #define XFRM_POLICY_ALLOW       0
 436 #define XFRM_POLICY_BLOCK       1
 437         __u8                            flags;
 438 #define XFRM_POLICY_LOCALOK     1       /* Allow user to override global policy */
 439         /* Automatically expand selector to include matching ICMP payloads. */
 440 #define XFRM_POLICY_ICMP        2
 441 #define XFRM_POLICY_CPU_ACQUIRE 4
 442         __u8                            share;
 443 };
 444
 445 struct xfrm_userpolicy_id {
 446         struct xfrm_selector            sel;
 447         __u32                           index;
 448         __u8                            dir;
 449 };
 450
 451 struct xfrm_user_acquire {
 452         struct xfrm_id                  id;
 453         xfrm_address_t                  saddr;
 454         struct xfrm_selector            sel;
 455         struct xfrm_userpolicy_info     policy;
 456         __u32                           aalgos;
 457         __u32                           ealgos;
 458         __u32                           calgos;
 459         __u32                           seq;
 460 };
 461
 462 struct xfrm_user_expire {
 463         struct xfrm_usersa_info         state;
 464         __u8                            hard;
 465 };
 466
 467 struct xfrm_user_polexpire {
 468         struct xfrm_userpolicy_info     pol;
 469         __u8                            hard;
 470 };
 471
 472 struct xfrm_usersa_flush {
 473         __u8                            proto;
 474 };
 475
 476 struct xfrm_user_report {
 477         __u8                            proto;
 478         struct xfrm_selector            sel;
 479 };
 480
 481 /* Used by MIGRATE to pass addresses IKE should use to perform
 482  * SA negotiation with the peer */
 483 struct xfrm_user_kmaddress {
 484         xfrm_address_t                  local;
 485         xfrm_address_t                  remote;
 486         __u32                           reserved;
 487         __u16                           family;
 488 };
 489
 490 struct xfrm_user_migrate {
 491         xfrm_address_t                  old_daddr;
 492         xfrm_address_t                  old_saddr;
 493         xfrm_address_t                  new_daddr;
 494         xfrm_address_t                  new_saddr;
 495         __u8                            proto;
 496         __u8                            mode;
 497         __u16                           reserved;
 498         __u32                           reqid;
 499         __u16                           old_family;
 500         __u16                           new_family;
 501 };
 502
 503 struct xfrm_user_mapping {
 504         struct xfrm_usersa_id           id;
 505         __u32                           reqid;
 506         xfrm_address_t                  old_saddr;
 507         xfrm_address_t                  new_saddr;
 508         __be16                          old_sport;
 509         __be16                          new_sport;
 510 };
 511
 512 struct xfrm_address_filter {
 513         xfrm_address_t                  saddr;
 514         xfrm_address_t                  daddr;
 515         __u16                           family;
 516         __u8                            splen;
 517         __u8                            dplen;
 518 };
 519
 520 struct xfrm_user_offload {
 521         int                             ifindex;
 522         __u8                            flags;
 523 };
 524 /* This flag was exposed without any kernel code that supports it.
 525  * Unfortunately, strongswan has the code that sets this flag,
 526  * which makes it impossible to reuse this bit.
 527  *
 528  * So leave it here to make sure that it won't be reused by mistake.
 529  */
 530 #define XFRM_OFFLOAD_IPV6       1
 531 #define XFRM_OFFLOAD_INBOUND    2
 532 /* Two bits above are relevant for state path only, while
 533  * offload is used for both policy and state flows.
 534  *
 535  * In policy offload mode, they are free and can be safely reused.
 536  */
 537 #define XFRM_OFFLOAD_PACKET     4
 538
 539 struct xfrm_userpolicy_default {
 540 #define XFRM_USERPOLICY_UNSPEC  0
 541 #define XFRM_USERPOLICY_BLOCK   1
 542 #define XFRM_USERPOLICY_ACCEPT  2
 543         __u8                            in;
 544         __u8                            fwd;
 545         __u8                            out;
 546 };
 547
 548 #ifndef __KERNEL__
 549 /* backwards compatibility for userspace */
 550 #define XFRMGRP_ACQUIRE         1
 551 #define XFRMGRP_EXPIRE          2
 552 #define XFRMGRP_SA              4
 553 #define XFRMGRP_POLICY          8
 554 #define XFRMGRP_REPORT          0x20
 555 #endif
 556
 557 enum xfrm_nlgroups {
 558         XFRMNLGRP_NONE,
 559 #define XFRMNLGRP_NONE          XFRMNLGRP_NONE
 560         XFRMNLGRP_ACQUIRE,
 561 #define XFRMNLGRP_ACQUIRE       XFRMNLGRP_ACQUIRE
 562         XFRMNLGRP_EXPIRE,
 563 #define XFRMNLGRP_EXPIRE        XFRMNLGRP_EXPIRE
 564         XFRMNLGRP_SA,
 565 #define XFRMNLGRP_SA            XFRMNLGRP_SA
 566         XFRMNLGRP_POLICY,
 567 #define XFRMNLGRP_POLICY        XFRMNLGRP_POLICY
 568         XFRMNLGRP_AEVENTS,
 569 #define XFRMNLGRP_AEVENTS       XFRMNLGRP_AEVENTS
 570         XFRMNLGRP_REPORT,
 571 #define XFRMNLGRP_REPORT        XFRMNLGRP_REPORT
 572         XFRMNLGRP_MIGRATE,
 573 #define XFRMNLGRP_MIGRATE       XFRMNLGRP_MIGRATE
 574         XFRMNLGRP_MAPPING,
 575 #define XFRMNLGRP_MAPPING       XFRMNLGRP_MAPPING
 576         __XFRMNLGRP_MAX
 577 };
 578 #define XFRMNLGRP_MAX   (__XFRMNLGRP_MAX - 1)
 579
 580 #endif /* _LINUX_XFRM_H */