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