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 {
  15         __be32          a4;
  16         __be32          a6[4];
  17 } xfrm_address_t;
  18
  19 /* Ident of a specific xfrm_state. It is used on input to lookup
  20  * the state by (spi,daddr,ah/esp) or to store information about
  21  * spi, protocol and tunnel address on output.
  22  */
  23 struct xfrm_id
  24 {
  25         xfrm_address_t  daddr;
  26         __be32          spi;
  27         __u8            proto;
  28 };
  29
  30 struct xfrm_sec_ctx {
  31         __u8    ctx_doi;
  32         __u8    ctx_alg;
  33         __u16   ctx_len;
  34         __u32   ctx_sid;
  35         char    ctx_str[0];
  36 };
  37
  38 /* Security Context Domains of Interpretation */
  39 #define XFRM_SC_DOI_RESERVED 0
  40 #define XFRM_SC_DOI_LSM 1
  41
  42 /* Security Context Algorithms */
  43 #define XFRM_SC_ALG_RESERVED 0
  44 #define XFRM_SC_ALG_SELINUX 1
  45
  46 /* Selector, used as selector both on policy rules (SPD) and SAs. */
  47
  48 struct xfrm_selector
  49 {
  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         uid_t   user;
  62 };
  63
  64 #define XFRM_INF (~(__u64)0)
  65
  66 struct xfrm_lifetime_cfg
  67 {
  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 {
  80         __u64   bytes;
  81         __u64   packets;
  82         __u64   add_time;
  83         __u64   use_time;
  84 };
  85
  86 struct xfrm_replay_state
  87 {
  88         __u32   oseq;
  89         __u32   seq;
  90         __u32   bitmap;
  91 };
  92
  93 struct xfrm_algo {
  94         char            alg_name[64];
  95         unsigned int    alg_key_len;    /* in bits */
  96         char            alg_key[0];
  97 };
  98
  99 struct xfrm_algo_aead {
 100         char            alg_name[64];
 101         unsigned int    alg_key_len;    /* in bits */
 102         unsigned int    alg_icv_len;    /* in bits */
 103         char            alg_key[0];
 104 };
 105
 106 struct xfrm_stats {
 107         __u32   replay_window;
 108         __u32   replay;
 109         __u32   integrity_failed;
 110 };
 111
 112 enum
 113 {
 114         XFRM_POLICY_TYPE_MAIN   = 0,
 115         XFRM_POLICY_TYPE_SUB    = 1,
 116         XFRM_POLICY_TYPE_MAX    = 2,
 117         XFRM_POLICY_TYPE_ANY    = 255
 118 };
 119
 120 enum
 121 {
 122         XFRM_POLICY_IN  = 0,
 123         XFRM_POLICY_OUT = 1,
 124         XFRM_POLICY_FWD = 2,
 125         XFRM_POLICY_MASK = 3,
 126         XFRM_POLICY_MAX = 3
 127 };
 128
 129 enum
 130 {
 131         XFRM_SHARE_ANY,         /* No limitations */
 132         XFRM_SHARE_SESSION,     /* For this session only */
 133         XFRM_SHARE_USER,        /* For this user only */
 134         XFRM_SHARE_UNIQUE       /* Use once */
 135 };
 136
 137 #define XFRM_MODE_TRANSPORT 0
 138 #define XFRM_MODE_TUNNEL 1
 139 #define XFRM_MODE_ROUTEOPTIMIZATION 2
 140 #define XFRM_MODE_IN_TRIGGER 3
 141 #define XFRM_MODE_BEET 4
 142 #define XFRM_MODE_MAX 5
 143
 144 /* Netlink configuration messages.  */
 145 enum {
 146         XFRM_MSG_BASE = 0x10,
 147
 148         XFRM_MSG_NEWSA = 0x10,
 149 #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA
 150         XFRM_MSG_DELSA,
 151 #define XFRM_MSG_DELSA XFRM_MSG_DELSA
 152         XFRM_MSG_GETSA,
 153 #define XFRM_MSG_GETSA XFRM_MSG_GETSA
 154
 155         XFRM_MSG_NEWPOLICY,
 156 #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY
 157         XFRM_MSG_DELPOLICY,
 158 #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY
 159         XFRM_MSG_GETPOLICY,
 160 #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY
 161
 162         XFRM_MSG_ALLOCSPI,
 163 #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI
 164         XFRM_MSG_ACQUIRE,
 165 #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE
 166         XFRM_MSG_EXPIRE,
 167 #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE
 168
 169         XFRM_MSG_UPDPOLICY,
 170 #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY
 171         XFRM_MSG_UPDSA,
 172 #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA
 173
 174         XFRM_MSG_POLEXPIRE,
 175 #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE
 176
 177         XFRM_MSG_FLUSHSA,
 178 #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA
 179         XFRM_MSG_FLUSHPOLICY,
 180 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
 181
 182         XFRM_MSG_NEWAE,
 183 #define XFRM_MSG_NEWAE XFRM_MSG_NEWAE
 184         XFRM_MSG_GETAE,
 185 #define XFRM_MSG_GETAE XFRM_MSG_GETAE
 186
 187         XFRM_MSG_REPORT,
 188 #define XFRM_MSG_REPORT XFRM_MSG_REPORT
 189
 190         XFRM_MSG_MIGRATE,
 191 #define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE
 192
 193         XFRM_MSG_NEWSADINFO,
 194 #define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO
 195         XFRM_MSG_GETSADINFO,
 196 #define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO
 197
 198         XFRM_MSG_NEWSPDINFO,
 199 #define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO
 200         XFRM_MSG_GETSPDINFO,
 201 #define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO
 202         __XFRM_MSG_MAX
 203 };
 204 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
 205
 206 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
 207
 208 /*
 209  * Generic LSM security context for comunicating to user space
 210  * NOTE: Same format as sadb_x_sec_ctx
 211  */
 212 struct xfrm_user_sec_ctx {
 213         __u16                   len;
 214         __u16                   exttype;
 215         __u8                    ctx_alg;  /* LSMs: e.g., selinux == 1 */
 216         __u8                    ctx_doi;
 217         __u16                   ctx_len;
 218 };
 219
 220 struct xfrm_user_tmpl {
 221         struct xfrm_id          id;
 222         __u16                   family;
 223         xfrm_address_t          saddr;
 224         __u32                   reqid;
 225         __u8                    mode;
 226         __u8                    share;
 227         __u8                    optional;
 228         __u32                   aalgos;
 229         __u32                   ealgos;
 230         __u32                   calgos;
 231 };
 232
 233 struct xfrm_encap_tmpl {
 234         __u16           encap_type;
 235         __be16          encap_sport;
 236         __be16          encap_dport;
 237         xfrm_address_t  encap_oa;
 238 };
 239
 240 /* AEVENT flags  */
 241 enum xfrm_ae_ftype_t {
 242         XFRM_AE_UNSPEC,
 243         XFRM_AE_RTHR=1, /* replay threshold*/
 244         XFRM_AE_RVAL=2, /* replay value */
 245         XFRM_AE_LVAL=4, /* lifetime value */
 246         XFRM_AE_ETHR=8, /* expiry timer threshold */
 247         XFRM_AE_CR=16, /* Event cause is replay update */
 248         XFRM_AE_CE=32, /* Event cause is timer expiry */
 249         XFRM_AE_CU=64, /* Event cause is policy update */
 250         __XFRM_AE_MAX
 251
 252 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1)
 253 };
 254
 255 struct xfrm_userpolicy_type {
 256         __u8            type;
 257         __u16           reserved1;
 258         __u8            reserved2;
 259 };
 260
 261 /* Netlink message attributes.  */
 262 enum xfrm_attr_type_t {
 263         XFRMA_UNSPEC,
 264         XFRMA_ALG_AUTH,         /* struct xfrm_algo */
 265         XFRMA_ALG_CRYPT,        /* struct xfrm_algo */
 266         XFRMA_ALG_COMP,         /* struct xfrm_algo */
 267         XFRMA_ENCAP,            /* struct xfrm_algo + struct xfrm_encap_tmpl */
 268         XFRMA_TMPL,             /* 1 or more struct xfrm_user_tmpl */
 269         XFRMA_SA,
 270         XFRMA_POLICY,
 271         XFRMA_SEC_CTX,          /* struct xfrm_sec_ctx */
 272         XFRMA_LTIME_VAL,
 273         XFRMA_REPLAY_VAL,
 274         XFRMA_REPLAY_THRESH,
 275         XFRMA_ETIMER_THRESH,
 276         XFRMA_SRCADDR,          /* xfrm_address_t */
 277         XFRMA_COADDR,           /* xfrm_address_t */
 278         XFRMA_LASTUSED,
 279         XFRMA_POLICY_TYPE,      /* struct xfrm_userpolicy_type */
 280         XFRMA_MIGRATE,
 281         XFRMA_ALG_AEAD,         /* struct xfrm_algo_aead */
 282         __XFRMA_MAX
 283
 284 #define XFRMA_MAX (__XFRMA_MAX - 1)
 285 };
 286
 287 enum xfrm_sadattr_type_t {
 288         XFRMA_SAD_UNSPEC,
 289         XFRMA_SAD_CNT,
 290         XFRMA_SAD_HINFO,
 291         __XFRMA_SAD_MAX
 292
 293 #define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1)
 294 };
 295
 296 struct xfrmu_sadhinfo {
 297         __u32 sadhcnt; /* current hash bkts */
 298         __u32 sadhmcnt; /* max allowed hash bkts */
 299 };
 300
 301 enum xfrm_spdattr_type_t {
 302         XFRMA_SPD_UNSPEC,
 303         XFRMA_SPD_INFO,
 304         XFRMA_SPD_HINFO,
 305         __XFRMA_SPD_MAX
 306
 307 #define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1)
 308 };
 309
 310 struct xfrmu_spdinfo {
 311         __u32 incnt;
 312         __u32 outcnt;
 313         __u32 fwdcnt;
 314         __u32 inscnt;
 315         __u32 outscnt;
 316         __u32 fwdscnt;
 317 };
 318
 319 struct xfrmu_spdhinfo {
 320         __u32 spdhcnt;
 321         __u32 spdhmcnt;
 322 };
 323
 324 struct xfrm_usersa_info {
 325         struct xfrm_selector            sel;
 326         struct xfrm_id                  id;
 327         xfrm_address_t                  saddr;
 328         struct xfrm_lifetime_cfg        lft;
 329         struct xfrm_lifetime_cur        curlft;
 330         struct xfrm_stats               stats;
 331         __u32                           seq;
 332         __u32                           reqid;
 333         __u16                           family;
 334         __u8                            mode;           /* XFRM_MODE_xxx */
 335         __u8                            replay_window;
 336         __u8                            flags;
 337 #define XFRM_STATE_NOECN        1
 338 #define XFRM_STATE_DECAP_DSCP   2
 339 #define XFRM_STATE_NOPMTUDISC   4
 340 #define XFRM_STATE_WILDRECV     8
 341 #define XFRM_STATE_ICMP         16
 342 #define XFRM_STATE_AF_UNSPEC    32
 343 };
 344
 345 struct xfrm_usersa_id {
 346         xfrm_address_t                  daddr;
 347         __be32                          spi;
 348         __u16                           family;
 349         __u8                            proto;
 350 };
 351
 352 struct xfrm_aevent_id {
 353         struct xfrm_usersa_id           sa_id;
 354         xfrm_address_t                  saddr;
 355         __u32                           flags;
 356         __u32                           reqid;
 357 };
 358
 359 struct xfrm_userspi_info {
 360         struct xfrm_usersa_info         info;
 361         __u32                           min;
 362         __u32                           max;
 363 };
 364
 365 struct xfrm_userpolicy_info {
 366         struct xfrm_selector            sel;
 367         struct xfrm_lifetime_cfg        lft;
 368         struct xfrm_lifetime_cur        curlft;
 369         __u32                           priority;
 370         __u32                           index;
 371         __u8                            dir;
 372         __u8                            action;
 373 #define XFRM_POLICY_ALLOW       0
 374 #define XFRM_POLICY_BLOCK       1
 375         __u8                            flags;
 376 #define XFRM_POLICY_LOCALOK     1       /* Allow user to override global policy */
 377         /* Automatically expand selector to include matching ICMP payloads. */
 378 #define XFRM_POLICY_ICMP        2
 379         __u8                            share;
 380 };
 381
 382 struct xfrm_userpolicy_id {
 383         struct xfrm_selector            sel;
 384         __u32                           index;
 385         __u8                            dir;
 386 };
 387
 388 struct xfrm_user_acquire {
 389         struct xfrm_id                  id;
 390         xfrm_address_t                  saddr;
 391         struct xfrm_selector            sel;
 392         struct xfrm_userpolicy_info     policy;
 393         __u32                           aalgos;
 394         __u32                           ealgos;
 395         __u32                           calgos;
 396         __u32                           seq;
 397 };
 398
 399 struct xfrm_user_expire {
 400         struct xfrm_usersa_info         state;
 401         __u8                            hard;
 402 };
 403
 404 struct xfrm_user_polexpire {
 405         struct xfrm_userpolicy_info     pol;
 406         __u8                            hard;
 407 };
 408
 409 struct xfrm_usersa_flush {
 410         __u8                            proto;
 411 };
 412
 413 struct xfrm_user_report {
 414         __u8                            proto;
 415         struct xfrm_selector            sel;
 416 };
 417
 418 struct xfrm_user_migrate {
 419         xfrm_address_t                  old_daddr;
 420         xfrm_address_t                  old_saddr;
 421         xfrm_address_t                  new_daddr;
 422         xfrm_address_t                  new_saddr;
 423         __u8                            proto;
 424         __u8                            mode;
 425         __u16                           reserved;
 426         __u32                           reqid;
 427         __u16                           old_family;
 428         __u16                           new_family;
 429 };
 430
 431 #ifndef __KERNEL__
 432 /* backwards compatibility for userspace */
 433 #define XFRMGRP_ACQUIRE         1
 434 #define XFRMGRP_EXPIRE          2
 435 #define XFRMGRP_SA              4
 436 #define XFRMGRP_POLICY          8
 437 #define XFRMGRP_REPORT          0x20
 438 #endif
 439
 440 enum xfrm_nlgroups {
 441         XFRMNLGRP_NONE,
 442 #define XFRMNLGRP_NONE          XFRMNLGRP_NONE
 443         XFRMNLGRP_ACQUIRE,
 444 #define XFRMNLGRP_ACQUIRE       XFRMNLGRP_ACQUIRE
 445         XFRMNLGRP_EXPIRE,
 446 #define XFRMNLGRP_EXPIRE        XFRMNLGRP_EXPIRE
 447         XFRMNLGRP_SA,
 448 #define XFRMNLGRP_SA            XFRMNLGRP_SA
 449         XFRMNLGRP_POLICY,
 450 #define XFRMNLGRP_POLICY        XFRMNLGRP_POLICY
 451         XFRMNLGRP_AEVENTS,
 452 #define XFRMNLGRP_AEVENTS       XFRMNLGRP_AEVENTS
 453         XFRMNLGRP_REPORT,
 454 #define XFRMNLGRP_REPORT        XFRMNLGRP_REPORT
 455         XFRMNLGRP_MIGRATE,
 456 #define XFRMNLGRP_MIGRATE       XFRMNLGRP_MIGRATE
 457         __XFRMNLGRP_MAX
 458 };
 459 #define XFRMNLGRP_MAX   (__XFRMNLGRP_MAX - 1)
 460
 461 #endif /* _LINUX_XFRM_H */