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