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 #define XFRMA_REPLAY_ESN_MAX    4096
  88
  89 struct xfrm_replay_state_esn {
  90         unsigned int    bmp_len;
  91         __u32           oseq;
  92         __u32           seq;
  93         __u32           oseq_hi;
  94         __u32           seq_hi;
  95         __u32           replay_window;
  96         __u32           bmp[0];
  97 };
  98
  99 struct xfrm_algo {
 100         char            alg_name[64];
 101         unsigned int    alg_key_len;    /* in bits */
 102         char            alg_key[0];
 103 };
 104
 105 struct xfrm_algo_auth {
 106         char            alg_name[64];
 107         unsigned int    alg_key_len;    /* in bits */
 108         unsigned int    alg_trunc_len;  /* in bits */
 109         char            alg_key[0];
 110 };
 111
 112 struct xfrm_algo_aead {
 113         char            alg_name[64];
 114         unsigned int    alg_key_len;    /* in bits */
 115         unsigned int    alg_icv_len;    /* in bits */
 116         char            alg_key[0];
 117 };
 118
 119 struct xfrm_stats {
 120         __u32   replay_window;
 121         __u32   replay;
 122         __u32   integrity_failed;
 123 };
 124
 125 enum {
 126         XFRM_POLICY_TYPE_MAIN   = 0,
 127         XFRM_POLICY_TYPE_SUB    = 1,
 128         XFRM_POLICY_TYPE_MAX    = 2,
 129         XFRM_POLICY_TYPE_ANY    = 255
 130 };
 131
 132 enum {
 133         XFRM_POLICY_IN  = 0,
 134         XFRM_POLICY_OUT = 1,
 135         XFRM_POLICY_FWD = 2,
 136         XFRM_POLICY_MASK = 3,
 137         XFRM_POLICY_MAX = 3
 138 };
 139
 140 enum {
 141         XFRM_SHARE_ANY,         /* No limitations */
 142         XFRM_SHARE_SESSION,     /* For this session only */
 143         XFRM_SHARE_USER,        /* For this user only */
 144         XFRM_SHARE_UNIQUE       /* Use once */
 145 };
 146
 147 #define XFRM_MODE_TRANSPORT 0
 148 #define XFRM_MODE_TUNNEL 1
 149 #define XFRM_MODE_ROUTEOPTIMIZATION 2
 150 #define XFRM_MODE_IN_TRIGGER 3
 151 #define XFRM_MODE_BEET 4
 152 #define XFRM_MODE_MAX 5
 153
 154 /* Netlink configuration messages.  */
 155 enum {
 156         XFRM_MSG_BASE = 0x10,
 157
 158         XFRM_MSG_NEWSA = 0x10,
 159 #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA
 160         XFRM_MSG_DELSA,
 161 #define XFRM_MSG_DELSA XFRM_MSG_DELSA
 162         XFRM_MSG_GETSA,
 163 #define XFRM_MSG_GETSA XFRM_MSG_GETSA
 164
 165         XFRM_MSG_NEWPOLICY,
 166 #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY
 167         XFRM_MSG_DELPOLICY,
 168 #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY
 169         XFRM_MSG_GETPOLICY,
 170 #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY
 171
 172         XFRM_MSG_ALLOCSPI,
 173 #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI
 174         XFRM_MSG_ACQUIRE,
 175 #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE
 176         XFRM_MSG_EXPIRE,
 177 #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE
 178
 179         XFRM_MSG_UPDPOLICY,
 180 #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY
 181         XFRM_MSG_UPDSA,
 182 #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA
 183
 184         XFRM_MSG_POLEXPIRE,
 185 #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE
 186
 187         XFRM_MSG_FLUSHSA,
 188 #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA
 189         XFRM_MSG_FLUSHPOLICY,
 190 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
 191
 192         XFRM_MSG_NEWAE,
 193 #define XFRM_MSG_NEWAE XFRM_MSG_NEWAE
 194         XFRM_MSG_GETAE,
 195 #define XFRM_MSG_GETAE XFRM_MSG_GETAE
 196
 197         XFRM_MSG_REPORT,
 198 #define XFRM_MSG_REPORT XFRM_MSG_REPORT
 199
 200         XFRM_MSG_MIGRATE,
 201 #define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE
 202
 203         XFRM_MSG_NEWSADINFO,
 204 #define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO
 205         XFRM_MSG_GETSADINFO,
 206 #define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO
 207
 208         XFRM_MSG_NEWSPDINFO,
 209 #define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO
 210         XFRM_MSG_GETSPDINFO,
 211 #define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO
 212
 213         XFRM_MSG_MAPPING,
 214 #define XFRM_MSG_MAPPING XFRM_MSG_MAPPING
 215         __XFRM_MSG_MAX
 216 };
 217 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
 218
 219 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
 220
 221 /*
 222  * Generic LSM security context for comunicating to user space
 223  * NOTE: Same format as sadb_x_sec_ctx
 224  */
 225 struct xfrm_user_sec_ctx {
 226         __u16                   len;
 227         __u16                   exttype;
 228         __u8                    ctx_alg;  /* LSMs: e.g., selinux == 1 */
 229         __u8                    ctx_doi;
 230         __u16                   ctx_len;
 231 };
 232
 233 struct xfrm_user_tmpl {
 234         struct xfrm_id          id;
 235         __u16                   family;
 236         xfrm_address_t          saddr;
 237         __u32                   reqid;
 238         __u8                    mode;
 239         __u8                    share;
 240         __u8                    optional;
 241         __u32                   aalgos;
 242         __u32                   ealgos;
 243         __u32                   calgos;
 244 };
 245
 246 struct xfrm_encap_tmpl {
 247         __u16           encap_type;
 248         __be16          encap_sport;
 249         __be16          encap_dport;
 250         xfrm_address_t  encap_oa;
 251 };
 252
 253 /* AEVENT flags  */
 254 enum xfrm_ae_ftype_t {
 255         XFRM_AE_UNSPEC,
 256         XFRM_AE_RTHR=1, /* replay threshold*/
 257         XFRM_AE_RVAL=2, /* replay value */
 258         XFRM_AE_LVAL=4, /* lifetime value */
 259         XFRM_AE_ETHR=8, /* expiry timer threshold */
 260         XFRM_AE_CR=16, /* Event cause is replay update */
 261         XFRM_AE_CE=32, /* Event cause is timer expiry */
 262         XFRM_AE_CU=64, /* Event cause is policy update */
 263         __XFRM_AE_MAX
 264
 265 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1)
 266 };
 267
 268 struct xfrm_userpolicy_type {
 269         __u8            type;
 270         __u16           reserved1;
 271         __u8            reserved2;
 272 };
 273
 274 /* Netlink message attributes.  */
 275 enum xfrm_attr_type_t {
 276         XFRMA_UNSPEC,
 277         XFRMA_ALG_AUTH,         /* struct xfrm_algo */
 278         XFRMA_ALG_CRYPT,        /* struct xfrm_algo */
 279         XFRMA_ALG_COMP,         /* struct xfrm_algo */
 280         XFRMA_ENCAP,            /* struct xfrm_algo + struct xfrm_encap_tmpl */
 281         XFRMA_TMPL,             /* 1 or more struct xfrm_user_tmpl */
 282         XFRMA_SA,               /* struct xfrm_usersa_info  */
 283         XFRMA_POLICY,           /*struct xfrm_userpolicy_info */
 284         XFRMA_SEC_CTX,          /* struct xfrm_sec_ctx */
 285         XFRMA_LTIME_VAL,
 286         XFRMA_REPLAY_VAL,
 287         XFRMA_REPLAY_THRESH,
 288         XFRMA_ETIMER_THRESH,
 289         XFRMA_SRCADDR,          /* xfrm_address_t */
 290         XFRMA_COADDR,           /* xfrm_address_t */
 291         XFRMA_LASTUSED,         /* unsigned long  */
 292         XFRMA_POLICY_TYPE,      /* struct xfrm_userpolicy_type */
 293         XFRMA_MIGRATE,
 294         XFRMA_ALG_AEAD,         /* struct xfrm_algo_aead */
 295         XFRMA_KMADDRESS,        /* struct xfrm_user_kmaddress */
 296         XFRMA_ALG_AUTH_TRUNC,   /* struct xfrm_algo_auth */
 297         XFRMA_MARK,             /* struct xfrm_mark */
 298         XFRMA_TFCPAD,           /* __u32 */
 299         XFRMA_REPLAY_ESN_VAL,   /* struct xfrm_replay_esn */
 300         __XFRMA_MAX
 301
 302 #define XFRMA_MAX (__XFRMA_MAX - 1)
 303 };
 304
 305 struct xfrm_mark {
 306         __u32           v; /* value */
 307         __u32           m; /* mask */
 308 };
 309
 310 enum xfrm_sadattr_type_t {
 311         XFRMA_SAD_UNSPEC,
 312         XFRMA_SAD_CNT,
 313         XFRMA_SAD_HINFO,
 314         __XFRMA_SAD_MAX
 315
 316 #define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1)
 317 };
 318
 319 struct xfrmu_sadhinfo {
 320         __u32 sadhcnt; /* current hash bkts */
 321         __u32 sadhmcnt; /* max allowed hash bkts */
 322 };
 323
 324 enum xfrm_spdattr_type_t {
 325         XFRMA_SPD_UNSPEC,
 326         XFRMA_SPD_INFO,
 327         XFRMA_SPD_HINFO,
 328         __XFRMA_SPD_MAX
 329
 330 #define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1)
 331 };
 332
 333 struct xfrmu_spdinfo {
 334         __u32 incnt;
 335         __u32 outcnt;
 336         __u32 fwdcnt;
 337         __u32 inscnt;
 338         __u32 outscnt;
 339         __u32 fwdscnt;
 340 };
 341
 342 struct xfrmu_spdhinfo {
 343         __u32 spdhcnt;
 344         __u32 spdhmcnt;
 345 };
 346
 347 struct xfrm_usersa_info {
 348         struct xfrm_selector            sel;
 349         struct xfrm_id                  id;
 350         xfrm_address_t                  saddr;
 351         struct xfrm_lifetime_cfg        lft;
 352         struct xfrm_lifetime_cur        curlft;
 353         struct xfrm_stats               stats;
 354         __u32                           seq;
 355         __u32                           reqid;
 356         __u16                           family;
 357         __u8                            mode;           /* XFRM_MODE_xxx */
 358         __u8                            replay_window;
 359         __u8                            flags;
 360 #define XFRM_STATE_NOECN        1
 361 #define XFRM_STATE_DECAP_DSCP   2
 362 #define XFRM_STATE_NOPMTUDISC   4
 363 #define XFRM_STATE_WILDRECV     8
 364 #define XFRM_STATE_ICMP         16
 365 #define XFRM_STATE_AF_UNSPEC    32
 366 #define XFRM_STATE_ALIGN4       64
 367 #define XFRM_STATE_ESN          128
 368 };
 369
 370 struct xfrm_usersa_id {
 371         xfrm_address_t                  daddr;
 372         __be32                          spi;
 373         __u16                           family;
 374         __u8                            proto;
 375 };
 376
 377 struct xfrm_aevent_id {
 378         struct xfrm_usersa_id           sa_id;
 379         xfrm_address_t                  saddr;
 380         __u32                           flags;
 381         __u32                           reqid;
 382 };
 383
 384 struct xfrm_userspi_info {
 385         struct xfrm_usersa_info         info;
 386         __u32                           min;
 387         __u32                           max;
 388 };
 389
 390 struct xfrm_userpolicy_info {
 391         struct xfrm_selector            sel;
 392         struct xfrm_lifetime_cfg        lft;
 393         struct xfrm_lifetime_cur        curlft;
 394         __u32                           priority;
 395         __u32                           index;
 396         __u8                            dir;
 397         __u8                            action;
 398 #define XFRM_POLICY_ALLOW       0
 399 #define XFRM_POLICY_BLOCK       1
 400         __u8                            flags;
 401 #define XFRM_POLICY_LOCALOK     1       /* Allow user to override global policy */
 402         /* Automatically expand selector to include matching ICMP payloads. */
 403 #define XFRM_POLICY_ICMP        2
 404         __u8                            share;
 405 };
 406
 407 struct xfrm_userpolicy_id {
 408         struct xfrm_selector            sel;
 409         __u32                           index;
 410         __u8                            dir;
 411 };
 412
 413 struct xfrm_user_acquire {
 414         struct xfrm_id                  id;
 415         xfrm_address_t                  saddr;
 416         struct xfrm_selector            sel;
 417         struct xfrm_userpolicy_info     policy;
 418         __u32                           aalgos;
 419         __u32                           ealgos;
 420         __u32                           calgos;
 421         __u32                           seq;
 422 };
 423
 424 struct xfrm_user_expire {
 425         struct xfrm_usersa_info         state;
 426         __u8                            hard;
 427 };
 428
 429 struct xfrm_user_polexpire {
 430         struct xfrm_userpolicy_info     pol;
 431         __u8                            hard;
 432 };
 433
 434 struct xfrm_usersa_flush {
 435         __u8                            proto;
 436 };
 437
 438 struct xfrm_user_report {
 439         __u8                            proto;
 440         struct xfrm_selector            sel;
 441 };
 442
 443 /* Used by MIGRATE to pass addresses IKE should use to perform
 444  * SA negotiation with the peer */
 445 struct xfrm_user_kmaddress {
 446         xfrm_address_t                  local;
 447         xfrm_address_t                  remote;
 448         __u32                           reserved;
 449         __u16                           family;
 450 };
 451
 452 struct xfrm_user_migrate {
 453         xfrm_address_t                  old_daddr;
 454         xfrm_address_t                  old_saddr;
 455         xfrm_address_t                  new_daddr;
 456         xfrm_address_t                  new_saddr;
 457         __u8                            proto;
 458         __u8                            mode;
 459         __u16                           reserved;
 460         __u32                           reqid;
 461         __u16                           old_family;
 462         __u16                           new_family;
 463 };
 464
 465 struct xfrm_user_mapping {
 466         struct xfrm_usersa_id           id;
 467         __u32                           reqid;
 468         xfrm_address_t                  old_saddr;
 469         xfrm_address_t                  new_saddr;
 470         __be16                          old_sport;
 471         __be16                          new_sport;
 472 };
 473
 474 #ifndef __KERNEL__
 475 /* backwards compatibility for userspace */
 476 #define XFRMGRP_ACQUIRE         1
 477 #define XFRMGRP_EXPIRE          2
 478 #define XFRMGRP_SA              4
 479 #define XFRMGRP_POLICY          8
 480 #define XFRMGRP_REPORT          0x20
 481 #endif
 482
 483 enum xfrm_nlgroups {
 484         XFRMNLGRP_NONE,
 485 #define XFRMNLGRP_NONE          XFRMNLGRP_NONE
 486         XFRMNLGRP_ACQUIRE,
 487 #define XFRMNLGRP_ACQUIRE       XFRMNLGRP_ACQUIRE
 488         XFRMNLGRP_EXPIRE,
 489 #define XFRMNLGRP_EXPIRE        XFRMNLGRP_EXPIRE
 490         XFRMNLGRP_SA,
 491 #define XFRMNLGRP_SA            XFRMNLGRP_SA
 492         XFRMNLGRP_POLICY,
 493 #define XFRMNLGRP_POLICY        XFRMNLGRP_POLICY
 494         XFRMNLGRP_AEVENTS,
 495 #define XFRMNLGRP_AEVENTS       XFRMNLGRP_AEVENTS
 496         XFRMNLGRP_REPORT,
 497 #define XFRMNLGRP_REPORT        XFRMNLGRP_REPORT
 498         XFRMNLGRP_MIGRATE,
 499 #define XFRMNLGRP_MIGRATE       XFRMNLGRP_MIGRATE
 500         XFRMNLGRP_MAPPING,
 501 #define XFRMNLGRP_MAPPING       XFRMNLGRP_MAPPING
 502         __XFRMNLGRP_MAX
 503 };
 504 #define XFRMNLGRP_MAX   (__XFRMNLGRP_MAX - 1)
 505
 506 #endif /* _LINUX_XFRM_H */