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
   8 /* All of the structures in this file may not change size as they are
   9  * passed into the kernel from userspace via netlink sockets.
  10  */
  11
  12 /* Structure to encapsulate addresses. I do not want to use
  13  * "standard" structure. My apologies.
  14  */
  15 typedef union {
  16         __be32          a4;
  17         __be32          a6[4];
  18         struct in6_addr in6;
  19 } xfrm_address_t;
  20
  21 /* Ident of a specific xfrm_state. It is used on input to lookup
  22  * the state by (spi,daddr,ah/esp) or to store information about
  23  * spi, protocol and tunnel address on output.
  24  */
  25 struct xfrm_id {
  26         xfrm_address_t  daddr;
  27         __be32          spi;
  28         __u8            proto;
  29 };
  30
  31 struct xfrm_sec_ctx {
  32         __u8    ctx_doi;
  33         __u8    ctx_alg;
  34         __u16   ctx_len;
  35         __u32   ctx_sid;
  36         char    ctx_str[0];
  37 };
  38
  39 /* Security Context Domains of Interpretation */
  40 #define XFRM_SC_DOI_RESERVED 0
  41 #define XFRM_SC_DOI_LSM 1
  42
  43 /* Security Context Algorithms */
  44 #define XFRM_SC_ALG_RESERVED 0
  45 #define XFRM_SC_ALG_SELINUX 1
  46
  47 /* Selector, used as selector both on policy rules (SPD) and SAs. */
  48
  49 struct xfrm_selector {
  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         __kernel_uid32_t        user;
  62 };
  63
  64 #define XFRM_INF (~(__u64)0)
  65
  66 struct xfrm_lifetime_cfg {
  67         __u64   soft_byte_limit;
  68         __u64   hard_byte_limit;
  69         __u64   soft_packet_limit;
  70         __u64   hard_packet_limit;
  71         __u64   soft_add_expires_seconds;
  72         __u64   hard_add_expires_seconds;
  73         __u64   soft_use_expires_seconds;
  74         __u64   hard_use_expires_seconds;
  75 };
  76
  77 struct xfrm_lifetime_cur {
  78         __u64   bytes;
  79         __u64   packets;
  80         __u64   add_time;
  81         __u64   use_time;
  82 };
  83
  84 struct xfrm_replay_state {
  85         __u32   oseq;
  86         __u32   seq;
  87         __u32   bitmap;
  88 };
  89
  90 #define XFRMA_REPLAY_ESN_MAX    4096
  91
  92 struct xfrm_replay_state_esn {
  93         unsigned int    bmp_len;
  94         __u32           oseq;
  95         __u32           seq;
  96         __u32           oseq_hi;
  97         __u32           seq_hi;
  98         __u32           replay_window;
  99         __u32           bmp[0];
 100 };
 101
 102 struct xfrm_algo {
 103         char            alg_name[64];
 104         unsigned int    alg_key_len;    /* in bits */
 105         char            alg_key[0];
 106 };
 107
 108 struct xfrm_algo_auth {
 109         char            alg_name[64];
 110         unsigned int    alg_key_len;    /* in bits */
 111         unsigned int    alg_trunc_len;  /* in bits */
 112         char            alg_key[0];
 113 };
 114
 115 struct xfrm_algo_aead {
 116         char            alg_name[64];
 117         unsigned int    alg_key_len;    /* in bits */
 118         unsigned int    alg_icv_len;    /* in bits */
 119         char            alg_key[0];
 120 };
 121
 122 struct xfrm_stats {
 123         __u32   replay_window;
 124         __u32   replay;
 125         __u32   integrity_failed;
 126 };
 127
 128 enum {
 129         XFRM_POLICY_TYPE_MAIN   = 0,
 130         XFRM_POLICY_TYPE_SUB    = 1,
 131         XFRM_POLICY_TYPE_MAX    = 2,
 132         XFRM_POLICY_TYPE_ANY    = 255
 133 };
 134
 135 enum {
 136         XFRM_POLICY_IN  = 0,
 137         XFRM_POLICY_OUT = 1,
 138         XFRM_POLICY_FWD = 2,
 139         XFRM_POLICY_MASK = 3,
 140         XFRM_POLICY_MAX = 3
 141 };
 142
 143 enum {
 144         XFRM_SHARE_ANY,         /* No limitations */
 145         XFRM_SHARE_SESSION,     /* For this session only */
 146         XFRM_SHARE_USER,        /* For this user only */
 147         XFRM_SHARE_UNIQUE       /* Use once */
 148 };
 149
 150 #define XFRM_MODE_TRANSPORT 0
 151 #define XFRM_MODE_TUNNEL 1
 152 #define XFRM_MODE_ROUTEOPTIMIZATION 2
 153 #define XFRM_MODE_IN_TRIGGER 3
 154 #define XFRM_MODE_BEET 4
 155 #define XFRM_MODE_MAX 5
 156
 157 /* Netlink configuration messages.  */
 158 enum {
 159         XFRM_MSG_BASE = 0x10,
 160
 161         XFRM_MSG_NEWSA = 0x10,
 162 #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA
 163         XFRM_MSG_DELSA,
 164 #define XFRM_MSG_DELSA XFRM_MSG_DELSA
 165         XFRM_MSG_GETSA,
 166 #define XFRM_MSG_GETSA XFRM_MSG_GETSA
 167
 168         XFRM_MSG_NEWPOLICY,
 169 #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY
 170         XFRM_MSG_DELPOLICY,
 171 #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY
 172         XFRM_MSG_GETPOLICY,
 173 #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY
 174
 175         XFRM_MSG_ALLOCSPI,
 176 #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI
 177         XFRM_MSG_ACQUIRE,
 178 #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE
 179         XFRM_MSG_EXPIRE,
 180 #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE
 181
 182         XFRM_MSG_UPDPOLICY,
 183 #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY
 184         XFRM_MSG_UPDSA,
 185 #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA
 186
 187         XFRM_MSG_POLEXPIRE,
 188 #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE
 189
 190         XFRM_MSG_FLUSHSA,
 191 #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA
 192         XFRM_MSG_FLUSHPOLICY,
 193 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
 194
 195         XFRM_MSG_NEWAE,
 196 #define XFRM_MSG_NEWAE XFRM_MSG_NEWAE
 197         XFRM_MSG_GETAE,
 198 #define XFRM_MSG_GETAE XFRM_MSG_GETAE
 199
 200         XFRM_MSG_REPORT,
 201 #define XFRM_MSG_REPORT XFRM_MSG_REPORT
 202
 203         XFRM_MSG_MIGRATE,
 204 #define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE
 205
 206         XFRM_MSG_NEWSADINFO,
 207 #define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO
 208         XFRM_MSG_GETSADINFO,
 209 #define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO
 210
 211         XFRM_MSG_NEWSPDINFO,
 212 #define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO
 213         XFRM_MSG_GETSPDINFO,
 214 #define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO
 215
 216         XFRM_MSG_MAPPING,
 217 #define XFRM_MSG_MAPPING XFRM_MSG_MAPPING
 218         __XFRM_MSG_MAX
 219 };
 220 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
 221
 222 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
 223
 224 /*
 225  * Generic LSM security context for comunicating to user space
 226  * NOTE: Same format as sadb_x_sec_ctx
 227  */
 228 struct xfrm_user_sec_ctx {
 229         __u16                   len;
 230         __u16                   exttype;
 231         __u8                    ctx_alg;  /* LSMs: e.g., selinux == 1 */
 232         __u8                    ctx_doi;
 233         __u16                   ctx_len;
 234 };
 235
 236 struct xfrm_user_tmpl {
 237         struct xfrm_id          id;
 238         __u16                   family;
 239         xfrm_address_t          saddr;
 240         __u32                   reqid;
 241         __u8                    mode;
 242         __u8                    share;
 243         __u8                    optional;
 244         __u32                   aalgos;
 245         __u32                   ealgos;
 246         __u32                   calgos;
 247 };
 248
 249 struct xfrm_encap_tmpl {
 250         __u16           encap_type;
 251         __be16          encap_sport;
 252         __be16          encap_dport;
 253         xfrm_address_t  encap_oa;
 254 };
 255
 256 /* AEVENT flags  */
 257 enum xfrm_ae_ftype_t {
 258         XFRM_AE_UNSPEC,
 259         XFRM_AE_RTHR=1, /* replay threshold*/
 260         XFRM_AE_RVAL=2, /* replay value */
 261         XFRM_AE_LVAL=4, /* lifetime value */
 262         XFRM_AE_ETHR=8, /* expiry timer threshold */
 263         XFRM_AE_CR=16, /* Event cause is replay update */
 264         XFRM_AE_CE=32, /* Event cause is timer expiry */
 265         XFRM_AE_CU=64, /* Event cause is policy update */
 266         __XFRM_AE_MAX
 267
 268 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1)
 269 };
 270
 271 struct xfrm_userpolicy_type {
 272         __u8            type;
 273         __u16           reserved1;
 274         __u8            reserved2;
 275 };
 276
 277 /* Netlink message attributes.  */
 278 enum xfrm_attr_type_t {
 279         XFRMA_UNSPEC,
 280         XFRMA_ALG_AUTH,         /* struct xfrm_algo */
 281         XFRMA_ALG_CRYPT,        /* struct xfrm_algo */
 282         XFRMA_ALG_COMP,         /* struct xfrm_algo */
 283         XFRMA_ENCAP,            /* struct xfrm_algo + struct xfrm_encap_tmpl */
 284         XFRMA_TMPL,             /* 1 or more struct xfrm_user_tmpl */
 285         XFRMA_SA,               /* struct xfrm_usersa_info  */
 286         XFRMA_POLICY,           /*struct xfrm_userpolicy_info */
 287         XFRMA_SEC_CTX,          /* struct xfrm_sec_ctx */
 288         XFRMA_LTIME_VAL,
 289         XFRMA_REPLAY_VAL,
 290         XFRMA_REPLAY_THRESH,
 291         XFRMA_ETIMER_THRESH,
 292         XFRMA_SRCADDR,          /* xfrm_address_t */
 293         XFRMA_COADDR,           /* xfrm_address_t */
 294         XFRMA_LASTUSED,         /* unsigned long  */
 295         XFRMA_POLICY_TYPE,      /* struct xfrm_userpolicy_type */
 296         XFRMA_MIGRATE,
 297         XFRMA_ALG_AEAD,         /* struct xfrm_algo_aead */
 298         XFRMA_KMADDRESS,        /* struct xfrm_user_kmaddress */
 299         XFRMA_ALG_AUTH_TRUNC,   /* struct xfrm_algo_auth */
 300         XFRMA_MARK,             /* struct xfrm_mark */
 301         XFRMA_TFCPAD,           /* __u32 */
 302         XFRMA_REPLAY_ESN_VAL,   /* struct xfrm_replay_state_esn */
 303         XFRMA_SA_EXTRA_FLAGS,   /* __u32 */
 304         XFRMA_PROTO,            /* __u8 */
 305         XFRMA_ADDRESS_FILTER,   /* struct xfrm_address_filter */
 306         XFRMA_PAD,
 307         XFRMA_OFFLOAD_DEV,      /* struct xfrm_state_offload */
 308         XFRMA_OUTPUT_MARK,      /* __u32 */
 309         __XFRMA_MAX
 310
 311 #define XFRMA_MAX (__XFRMA_MAX - 1)
 312 };
 313
 314 struct xfrm_mark {
 315         __u32           v; /* value */
 316         __u32           m; /* mask */
 317 };
 318
 319 enum xfrm_sadattr_type_t {
 320         XFRMA_SAD_UNSPEC,
 321         XFRMA_SAD_CNT,
 322         XFRMA_SAD_HINFO,
 323         __XFRMA_SAD_MAX
 324
 325 #define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1)
 326 };
 327
 328 struct xfrmu_sadhinfo {
 329         __u32 sadhcnt; /* current hash bkts */
 330         __u32 sadhmcnt; /* max allowed hash bkts */
 331 };
 332
 333 enum xfrm_spdattr_type_t {
 334         XFRMA_SPD_UNSPEC,
 335         XFRMA_SPD_INFO,
 336         XFRMA_SPD_HINFO,
 337         XFRMA_SPD_IPV4_HTHRESH,
 338         XFRMA_SPD_IPV6_HTHRESH,
 339         __XFRMA_SPD_MAX
 340
 341 #define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1)
 342 };
 343
 344 struct xfrmu_spdinfo {
 345         __u32 incnt;
 346         __u32 outcnt;
 347         __u32 fwdcnt;
 348         __u32 inscnt;
 349         __u32 outscnt;
 350         __u32 fwdscnt;
 351 };
 352
 353 struct xfrmu_spdhinfo {
 354         __u32 spdhcnt;
 355         __u32 spdhmcnt;
 356 };
 357
 358 struct xfrmu_spdhthresh {
 359         __u8 lbits;
 360         __u8 rbits;
 361 };
 362
 363 struct xfrm_usersa_info {
 364         struct xfrm_selector            sel;
 365         struct xfrm_id                  id;
 366         xfrm_address_t                  saddr;
 367         struct xfrm_lifetime_cfg        lft;
 368         struct xfrm_lifetime_cur        curlft;
 369         struct xfrm_stats               stats;
 370         __u32                           seq;
 371         __u32                           reqid;
 372         __u16                           family;
 373         __u8                            mode;           /* XFRM_MODE_xxx */
 374         __u8                            replay_window;
 375         __u8                            flags;
 376 #define XFRM_STATE_NOECN        1
 377 #define XFRM_STATE_DECAP_DSCP   2
 378 #define XFRM_STATE_NOPMTUDISC   4
 379 #define XFRM_STATE_WILDRECV     8
 380 #define XFRM_STATE_ICMP         16
 381 #define XFRM_STATE_AF_UNSPEC    32
 382 #define XFRM_STATE_ALIGN4       64
 383 #define XFRM_STATE_ESN          128
 384 };
 385
 386 #define XFRM_SA_XFLAG_DONT_ENCAP_DSCP   1
 387
 388 struct xfrm_usersa_id {
 389         xfrm_address_t                  daddr;
 390         __be32                          spi;
 391         __u16                           family;
 392         __u8                            proto;
 393 };
 394
 395 struct xfrm_aevent_id {
 396         struct xfrm_usersa_id           sa_id;
 397         xfrm_address_t                  saddr;
 398         __u32                           flags;
 399         __u32                           reqid;
 400 };
 401
 402 struct xfrm_userspi_info {
 403         struct xfrm_usersa_info         info;
 404         __u32                           min;
 405         __u32                           max;
 406 };
 407
 408 struct xfrm_userpolicy_info {
 409         struct xfrm_selector            sel;
 410         struct xfrm_lifetime_cfg        lft;
 411         struct xfrm_lifetime_cur        curlft;
 412         __u32                           priority;
 413         __u32                           index;
 414         __u8                            dir;
 415         __u8                            action;
 416 #define XFRM_POLICY_ALLOW       0
 417 #define XFRM_POLICY_BLOCK       1
 418         __u8                            flags;
 419 #define XFRM_POLICY_LOCALOK     1       /* Allow user to override global policy */
 420         /* Automatically expand selector to include matching ICMP payloads. */
 421 #define XFRM_POLICY_ICMP        2
 422         __u8                            share;
 423 };
 424
 425 struct xfrm_userpolicy_id {
 426         struct xfrm_selector            sel;
 427         __u32                           index;
 428         __u8                            dir;
 429 };
 430
 431 struct xfrm_user_acquire {
 432         struct xfrm_id                  id;
 433         xfrm_address_t                  saddr;
 434         struct xfrm_selector            sel;
 435         struct xfrm_userpolicy_info     policy;
 436         __u32                           aalgos;
 437         __u32                           ealgos;
 438         __u32                           calgos;
 439         __u32                           seq;
 440 };
 441
 442 struct xfrm_user_expire {
 443         struct xfrm_usersa_info         state;
 444         __u8                            hard;
 445 };
 446
 447 struct xfrm_user_polexpire {
 448         struct xfrm_userpolicy_info     pol;
 449         __u8                            hard;
 450 };
 451
 452 struct xfrm_usersa_flush {
 453         __u8                            proto;
 454 };
 455
 456 struct xfrm_user_report {
 457         __u8                            proto;
 458         struct xfrm_selector            sel;
 459 };
 460
 461 /* Used by MIGRATE to pass addresses IKE should use to perform
 462  * SA negotiation with the peer */
 463 struct xfrm_user_kmaddress {
 464         xfrm_address_t                  local;
 465         xfrm_address_t                  remote;
 466         __u32                           reserved;
 467         __u16                           family;
 468 };
 469
 470 struct xfrm_user_migrate {
 471         xfrm_address_t                  old_daddr;
 472         xfrm_address_t                  old_saddr;
 473         xfrm_address_t                  new_daddr;
 474         xfrm_address_t                  new_saddr;
 475         __u8                            proto;
 476         __u8                            mode;
 477         __u16                           reserved;
 478         __u32                           reqid;
 479         __u16                           old_family;
 480         __u16                           new_family;
 481 };
 482
 483 struct xfrm_user_mapping {
 484         struct xfrm_usersa_id           id;
 485         __u32                           reqid;
 486         xfrm_address_t                  old_saddr;
 487         xfrm_address_t                  new_saddr;
 488         __be16                          old_sport;
 489         __be16                          new_sport;
 490 };
 491
 492 struct xfrm_address_filter {
 493         xfrm_address_t                  saddr;
 494         xfrm_address_t                  daddr;
 495         __u16                           family;
 496         __u8                            splen;
 497         __u8                            dplen;
 498 };
 499
 500 struct xfrm_user_offload {
 501         int                             ifindex;
 502         __u8                            flags;
 503 };
 504 #define XFRM_OFFLOAD_IPV6       1
 505 #define XFRM_OFFLOAD_INBOUND    2
 506
 507 #ifndef __KERNEL__
 508 /* backwards compatibility for userspace */
 509 #define XFRMGRP_ACQUIRE         1
 510 #define XFRMGRP_EXPIRE          2
 511 #define XFRMGRP_SA              4
 512 #define XFRMGRP_POLICY          8
 513 #define XFRMGRP_REPORT          0x20
 514 #endif
 515
 516 enum xfrm_nlgroups {
 517         XFRMNLGRP_NONE,
 518 #define XFRMNLGRP_NONE          XFRMNLGRP_NONE
 519         XFRMNLGRP_ACQUIRE,
 520 #define XFRMNLGRP_ACQUIRE       XFRMNLGRP_ACQUIRE
 521         XFRMNLGRP_EXPIRE,
 522 #define XFRMNLGRP_EXPIRE        XFRMNLGRP_EXPIRE
 523         XFRMNLGRP_SA,
 524 #define XFRMNLGRP_SA            XFRMNLGRP_SA
 525         XFRMNLGRP_POLICY,
 526 #define XFRMNLGRP_POLICY        XFRMNLGRP_POLICY
 527         XFRMNLGRP_AEVENTS,
 528 #define XFRMNLGRP_AEVENTS       XFRMNLGRP_AEVENTS
 529         XFRMNLGRP_REPORT,
 530 #define XFRMNLGRP_REPORT        XFRMNLGRP_REPORT
 531         XFRMNLGRP_MIGRATE,
 532 #define XFRMNLGRP_MIGRATE       XFRMNLGRP_MIGRATE
 533         XFRMNLGRP_MAPPING,
 534 #define XFRMNLGRP_MAPPING       XFRMNLGRP_MAPPING
 535         __XFRMNLGRP_MAX
 536 };
 537 #define XFRMNLGRP_MAX   (__XFRMNLGRP_MAX - 1)
 538
 539 #endif /* _LINUX_XFRM_H */