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         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_MAX = 3
 118 };
 119
 120 enum
 121 {
 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         __XFRM_MSG_MAX
 189 };
 190 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
 191
 192 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
 193
 194 /*
 195  * Generic LSM security context for comunicating to user space
 196  * NOTE: Same format as sadb_x_sec_ctx
 197  */
 198 struct xfrm_user_sec_ctx {
 199         __u16                   len;
 200         __u16                   exttype;
 201         __u8                    ctx_alg;  /* LSMs: e.g., selinux == 1 */
 202         __u8                    ctx_doi;
 203         __u16                   ctx_len;
 204 };
 205
 206 struct xfrm_user_tmpl {
 207         struct xfrm_id          id;
 208         __u16                   family;
 209         xfrm_address_t          saddr;
 210         __u32                   reqid;
 211         __u8                    mode;
 212         __u8                    share;
 213         __u8                    optional;
 214         __u32                   aalgos;
 215         __u32                   ealgos;
 216         __u32                   calgos;
 217 };
 218
 219 struct xfrm_encap_tmpl {
 220         __u16           encap_type;
 221         __be16          encap_sport;
 222         __be16          encap_dport;
 223         xfrm_address_t  encap_oa;
 224 };
 225
 226 /* AEVENT flags  */
 227 enum xfrm_ae_ftype_t {
 228         XFRM_AE_UNSPEC,
 229         XFRM_AE_RTHR=1, /* replay threshold*/
 230         XFRM_AE_RVAL=2, /* replay value */
 231         XFRM_AE_LVAL=4, /* lifetime value */
 232         XFRM_AE_ETHR=8, /* expiry timer threshold */
 233         XFRM_AE_CR=16, /* Event cause is replay update */
 234         XFRM_AE_CE=32, /* Event cause is timer expiry */
 235         XFRM_AE_CU=64, /* Event cause is policy update */
 236         __XFRM_AE_MAX
 237
 238 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1)
 239 };
 240
 241 /* SAD Table filter flags  */
 242 enum xfrm_sad_ftype_t {
 243         XFRM_SAD_UNSPEC,
 244         XFRM_SAD_HMASK=1,
 245         XFRM_SAD_HMAX=2,
 246         XFRM_SAD_CNT=4,
 247         __XFRM_SAD_MAX
 248
 249 #define XFRM_SAD_MAX (__XFRM_SAD_MAX - 1)
 250 };
 251
 252 struct xfrm_userpolicy_type {
 253         __u8            type;
 254         __u16           reserved1;
 255         __u8            reserved2;
 256 };
 257
 258 /* Netlink message attributes.  */
 259 enum xfrm_attr_type_t {
 260         XFRMA_UNSPEC,
 261         XFRMA_ALG_AUTH,         /* struct xfrm_algo */
 262         XFRMA_ALG_CRYPT,        /* struct xfrm_algo */
 263         XFRMA_ALG_COMP,         /* struct xfrm_algo */
 264         XFRMA_ENCAP,            /* struct xfrm_algo + struct xfrm_encap_tmpl */
 265         XFRMA_TMPL,             /* 1 or more struct xfrm_user_tmpl */
 266         XFRMA_SA,
 267         XFRMA_POLICY,
 268         XFRMA_SEC_CTX,          /* struct xfrm_sec_ctx */
 269         XFRMA_LTIME_VAL,
 270         XFRMA_REPLAY_VAL,
 271         XFRMA_REPLAY_THRESH,
 272         XFRMA_ETIMER_THRESH,
 273         XFRMA_SRCADDR,          /* xfrm_address_t */
 274         XFRMA_COADDR,           /* xfrm_address_t */
 275         XFRMA_LASTUSED,
 276         XFRMA_POLICY_TYPE,      /* struct xfrm_userpolicy_type */
 277         XFRMA_MIGRATE,
 278         __XFRMA_MAX
 279
 280 #define XFRMA_MAX (__XFRMA_MAX - 1)
 281 };
 282
 283 enum xfrm_sadattr_type_t {
 284         XFRMA_SAD_UNSPEC,
 285         XFRMA_SADHMASK,
 286         XFRMA_SADHMAX,
 287         XFRMA_SADCNT,
 288         __XFRMA_SAD_MAX
 289
 290 #define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1)
 291 };
 292
 293 struct xfrm_usersa_info {
 294         struct xfrm_selector            sel;
 295         struct xfrm_id                  id;
 296         xfrm_address_t                  saddr;
 297         struct xfrm_lifetime_cfg        lft;
 298         struct xfrm_lifetime_cur        curlft;
 299         struct xfrm_stats               stats;
 300         __u32                           seq;
 301         __u32                           reqid;
 302         __u16                           family;
 303         __u8                            mode;           /* XFRM_MODE_xxx */
 304         __u8                            replay_window;
 305         __u8                            flags;
 306 #define XFRM_STATE_NOECN        1
 307 #define XFRM_STATE_DECAP_DSCP   2
 308 #define XFRM_STATE_NOPMTUDISC   4
 309 #define XFRM_STATE_WILDRECV     8
 310 };
 311
 312 struct xfrm_usersa_id {
 313         xfrm_address_t                  daddr;
 314         __be32                          spi;
 315         __u16                           family;
 316         __u8                            proto;
 317 };
 318
 319 struct xfrm_aevent_id {
 320         struct xfrm_usersa_id           sa_id;
 321         xfrm_address_t                  saddr;
 322         __u32                           flags;
 323         __u32                           reqid;
 324 };
 325
 326 struct xfrm_userspi_info {
 327         struct xfrm_usersa_info         info;
 328         __u32                           min;
 329         __u32                           max;
 330 };
 331
 332 struct xfrm_userpolicy_info {
 333         struct xfrm_selector            sel;
 334         struct xfrm_lifetime_cfg        lft;
 335         struct xfrm_lifetime_cur        curlft;
 336         __u32                           priority;
 337         __u32                           index;
 338         __u8                            dir;
 339         __u8                            action;
 340 #define XFRM_POLICY_ALLOW       0
 341 #define XFRM_POLICY_BLOCK       1
 342         __u8                            flags;
 343 #define XFRM_POLICY_LOCALOK     1       /* Allow user to override global policy */
 344         __u8                            share;
 345 };
 346
 347 struct xfrm_userpolicy_id {
 348         struct xfrm_selector            sel;
 349         __u32                           index;
 350         __u8                            dir;
 351 };
 352
 353 struct xfrm_user_acquire {
 354         struct xfrm_id                  id;
 355         xfrm_address_t                  saddr;
 356         struct xfrm_selector            sel;
 357         struct xfrm_userpolicy_info     policy;
 358         __u32                           aalgos;
 359         __u32                           ealgos;
 360         __u32                           calgos;
 361         __u32                           seq;
 362 };
 363
 364 struct xfrm_user_expire {
 365         struct xfrm_usersa_info         state;
 366         __u8                            hard;
 367 };
 368
 369 struct xfrm_user_polexpire {
 370         struct xfrm_userpolicy_info     pol;
 371         __u8                            hard;
 372 };
 373
 374 struct xfrm_usersa_flush {
 375         __u8                            proto;
 376 };
 377
 378 struct xfrm_user_report {
 379         __u8                            proto;
 380         struct xfrm_selector            sel;
 381 };
 382
 383 struct xfrm_user_migrate {
 384         xfrm_address_t                  old_daddr;
 385         xfrm_address_t                  old_saddr;
 386         xfrm_address_t                  new_daddr;
 387         xfrm_address_t                  new_saddr;
 388         __u8                            proto;
 389         __u8                            mode;
 390         __u16                           reserved;
 391         __u32                           reqid;
 392         __u16                           old_family;
 393         __u16                           new_family;
 394 };
 395
 396 #ifndef __KERNEL__
 397 /* backwards compatibility for userspace */
 398 #define XFRMGRP_ACQUIRE         1
 399 #define XFRMGRP_EXPIRE          2
 400 #define XFRMGRP_SA              4
 401 #define XFRMGRP_POLICY          8
 402 #define XFRMGRP_REPORT          0x20
 403 #endif
 404
 405 enum xfrm_nlgroups {
 406         XFRMNLGRP_NONE,
 407 #define XFRMNLGRP_NONE          XFRMNLGRP_NONE
 408         XFRMNLGRP_ACQUIRE,
 409 #define XFRMNLGRP_ACQUIRE       XFRMNLGRP_ACQUIRE
 410         XFRMNLGRP_EXPIRE,
 411 #define XFRMNLGRP_EXPIRE        XFRMNLGRP_EXPIRE
 412         XFRMNLGRP_SA,
 413 #define XFRMNLGRP_SA            XFRMNLGRP_SA
 414         XFRMNLGRP_POLICY,
 415 #define XFRMNLGRP_POLICY        XFRMNLGRP_POLICY
 416         XFRMNLGRP_AEVENTS,
 417 #define XFRMNLGRP_AEVENTS       XFRMNLGRP_AEVENTS
 418         XFRMNLGRP_REPORT,
 419 #define XFRMNLGRP_REPORT        XFRMNLGRP_REPORT
 420         XFRMNLGRP_MIGRATE,
 421 #define XFRMNLGRP_MIGRATE       XFRMNLGRP_MIGRATE
 422         __XFRMNLGRP_MAX
 423 };
 424 #define XFRMNLGRP_MAX   (__XFRMNLGRP_MAX - 1)
 425
 426 #endif /* _LINUX_XFRM_H */