include/linux/xfrm.h

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