include/linux/xfrm.h

   1 #ifndef _LINUX_XFRM_H
   2 #define _LINUX_XFRM_H
   3
   4 #include <linux/in6.h>
   5 #include <linux/types.h>
   6
   7 /* All of the structures in this file may not change size as they are
   8  * passed into the kernel from userspace via netlink sockets.
   9  */
  10
  11 /* Structure to encapsulate addresses. I do not want to use
  12  * "standard" structure. My apologies.
  13  */
  14 typedef union {
  15         __be32          a4;
  16         __be32          a6[4];
  17         struct in6_addr in6;
  18 } xfrm_address_t;
  19
  20 /* Ident of a specific xfrm_state. It is used on input to lookup
  21  * the state by (spi,daddr,ah/esp) or to store information about
  22  * spi, protocol and tunnel address on output.
  23  */
  24 struct xfrm_id {
  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         xfrm_address_t  daddr;
  50         xfrm_address_t  saddr;
  51         __be16  dport;
  52         __be16  dport_mask;
  53         __be16  sport;
  54         __be16  sport_mask;
  55         __u16   family;
  56         __u8    prefixlen_d;
  57         __u8    prefixlen_s;
  58         __u8    proto;
  59         int     ifindex;
  60         __kernel_uid32_t        user;
  61 };
  62
  63 #define XFRM_INF (~(__u64)0)
  64
  65 struct xfrm_lifetime_cfg {
  66         __u64   soft_byte_limit;
  67         __u64   hard_byte_limit;
  68         __u64   soft_packet_limit;
  69         __u64   hard_packet_limit;
  70         __u64   soft_add_expires_seconds;
  71         __u64   hard_add_expires_seconds;
  72         __u64   soft_use_expires_seconds;
  73         __u64   hard_use_expires_seconds;
  74 };
  75
  76 struct xfrm_lifetime_cur {
  77         __u64   bytes;
  78         __u64   packets;
  79         __u64   add_time;
  80         __u64   use_time;
  81 };
  82
  83 struct xfrm_replay_state {
  84         __u32   oseq;
  85         __u32   seq;
  86         __u32   bitmap;
  87 };
  88
  89 #define XFRMA_REPLAY_ESN_MAX    4096
  90
  91 struct xfrm_replay_state_esn {
  92         unsigned int    bmp_len;
  93         __u32           oseq;
  94         __u32           seq;
  95         __u32           oseq_hi;
  96         __u32           seq_hi;
  97         __u32           replay_window;
  98         __u32           bmp[0];
  99 };
 100
 101 struct xfrm_algo {
 102         char            alg_name[64];
 103         unsigned int    alg_key_len;    /* in bits */
 104         char            alg_key[0];
 105 };
 106
 107 struct xfrm_algo_auth {
 108         char            alg_name[64];
 109         unsigned int    alg_key_len;    /* in bits */
 110         unsigned int    alg_trunc_len;  /* in bits */
 111         char            alg_key[0];
 112 };
 113
 114 struct xfrm_algo_aead {
 115         char            alg_name[64];
 116         unsigned int    alg_key_len;    /* in bits */
 117         unsigned int    alg_icv_len;    /* in bits */
 118         char            alg_key[0];
 119 };
 120
 121 struct xfrm_stats {
 122         __u32   replay_window;
 123         __u32   replay;
 124         __u32   integrity_failed;
 125 };
 126
 127 enum {
 128         XFRM_POLICY_TYPE_MAIN   = 0,
 129         XFRM_POLICY_TYPE_SUB    = 1,
 130         XFRM_POLICY_TYPE_MAX    = 2,
 131         XFRM_POLICY_TYPE_ANY    = 255
 132 };
 133
 134 enum {
 135         XFRM_POLICY_IN  = 0,
 136         XFRM_POLICY_OUT = 1,
 137         XFRM_POLICY_FWD = 2,
 138         XFRM_POLICY_MASK = 3,
 139         XFRM_POLICY_MAX = 3
 140 };
 141
 142 enum {
 143         XFRM_SHARE_ANY,         /* No limitations */
 144         XFRM_SHARE_SESSION,     /* For this session only */
 145         XFRM_SHARE_USER,        /* For this user only */
 146         XFRM_SHARE_UNIQUE       /* Use once */
 147 };
 148
 149 #define XFRM_MODE_TRANSPORT 0
 150 #define XFRM_MODE_TUNNEL 1
 151 #define XFRM_MODE_ROUTEOPTIMIZATION 2
 152 #define XFRM_MODE_IN_TRIGGER 3
 153 #define XFRM_MODE_BEET 4
 154 #define XFRM_MODE_MAX 5
 155
 156 /* Netlink configuration messages.  */
 157 enum {
 158         XFRM_MSG_BASE = 0x10,
 159
 160         XFRM_MSG_NEWSA = 0x10,
 161 #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA
 162         XFRM_MSG_DELSA,
 163 #define XFRM_MSG_DELSA XFRM_MSG_DELSA
 164         XFRM_MSG_GETSA,
 165 #define XFRM_MSG_GETSA XFRM_MSG_GETSA
 166
 167         XFRM_MSG_NEWPOLICY,
 168 #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY
 169         XFRM_MSG_DELPOLICY,
 170 #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY
 171         XFRM_MSG_GETPOLICY,
 172 #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY
 173
 174         XFRM_MSG_ALLOCSPI,
 175 #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI
 176         XFRM_MSG_ACQUIRE,
 177 #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE
 178         XFRM_MSG_EXPIRE,
 179 #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE
 180
 181         XFRM_MSG_UPDPOLICY,
 182 #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY
 183         XFRM_MSG_UPDSA,
 184 #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA
 185
 186         XFRM_MSG_POLEXPIRE,
 187 #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE
 188
 189         XFRM_MSG_FLUSHSA,
 190 #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA
 191         XFRM_MSG_FLUSHPOLICY,
 192 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
 193
 194         XFRM_MSG_NEWAE,
 195 #define XFRM_MSG_NEWAE XFRM_MSG_NEWAE
 196         XFRM_MSG_GETAE,
 197 #define XFRM_MSG_GETAE XFRM_MSG_GETAE
 198
 199         XFRM_MSG_REPORT,
 200 #define XFRM_MSG_REPORT XFRM_MSG_REPORT
 201
 202         XFRM_MSG_MIGRATE,
 203 #define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE
 204
 205         XFRM_MSG_NEWSADINFO,
 206 #define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO
 207         XFRM_MSG_GETSADINFO,
 208 #define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO
 209
 210         XFRM_MSG_NEWSPDINFO,
 211 #define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO
 212         XFRM_MSG_GETSPDINFO,
 213 #define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO
 214
 215         XFRM_MSG_MAPPING,
 216 #define XFRM_MSG_MAPPING XFRM_MSG_MAPPING
 217         __XFRM_MSG_MAX
 218 };
 219 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
 220
 221 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
 222
 223 /*
 224  * Generic LSM security context for comunicating to user space
 225  * NOTE: Same format as sadb_x_sec_ctx
 226  */
 227 struct xfrm_user_sec_ctx {
 228         __u16                   len;
 229         __u16                   exttype;
 230         __u8                    ctx_alg;  /* LSMs: e.g., selinux == 1 */
 231         __u8                    ctx_doi;
 232         __u16                   ctx_len;
 233 };
 234
 235 struct xfrm_user_tmpl {
 236         struct xfrm_id          id;
 237         __u16                   family;
 238         xfrm_address_t          saddr;
 239         __u32                   reqid;
 240         __u8                    mode;
 241         __u8                    share;
 242         __u8                    optional;
 243         __u32                   aalgos;
 244         __u32                   ealgos;
 245         __u32                   calgos;
 246 };
 247
 248 struct xfrm_encap_tmpl {
 249         __u16           encap_type;
 250         __be16          encap_sport;
 251         __be16          encap_dport;
 252         xfrm_address_t  encap_oa;
 253 };
 254
 255 /* AEVENT flags  */
 256 enum xfrm_ae_ftype_t {
 257         XFRM_AE_UNSPEC,
 258         XFRM_AE_RTHR=1, /* replay threshold*/
 259         XFRM_AE_RVAL=2, /* replay value */
 260         XFRM_AE_LVAL=4, /* lifetime value */
 261         XFRM_AE_ETHR=8, /* expiry timer threshold */
 262         XFRM_AE_CR=16, /* Event cause is replay update */
 263         XFRM_AE_CE=32, /* Event cause is timer expiry */
 264         XFRM_AE_CU=64, /* Event cause is policy update */
 265         __XFRM_AE_MAX
 266
 267 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1)
 268 };
 269
 270 struct xfrm_userpolicy_type {
 271         __u8            type;
 272         __u16           reserved1;
 273         __u8            reserved2;
 274 };
 275
 276 /* Netlink message attributes.  */
 277 enum xfrm_attr_type_t {
 278         XFRMA_UNSPEC,
 279         XFRMA_ALG_AUTH,         /* struct xfrm_algo */
 280         XFRMA_ALG_CRYPT,        /* struct xfrm_algo */
 281         XFRMA_ALG_COMP,         /* struct xfrm_algo */
 282         XFRMA_ENCAP,            /* struct xfrm_algo + struct xfrm_encap_tmpl */
 283         XFRMA_TMPL,             /* 1 or more struct xfrm_user_tmpl */
 284         XFRMA_SA,               /* struct xfrm_usersa_info  */
 285         XFRMA_POLICY,           /*struct xfrm_userpolicy_info */
 286         XFRMA_SEC_CTX,          /* struct xfrm_sec_ctx */
 287         XFRMA_LTIME_VAL,
 288         XFRMA_REPLAY_VAL,
 289         XFRMA_REPLAY_THRESH,
 290         XFRMA_ETIMER_THRESH,
 291         XFRMA_SRCADDR,          /* xfrm_address_t */
 292         XFRMA_COADDR,           /* xfrm_address_t */
 293         XFRMA_LASTUSED,         /* unsigned long  */
 294         XFRMA_POLICY_TYPE,      /* struct xfrm_userpolicy_type */
 295         XFRMA_MIGRATE,
 296         XFRMA_ALG_AEAD,         /* struct xfrm_algo_aead */
 297         XFRMA_KMADDRESS,        /* struct xfrm_user_kmaddress */
 298         XFRMA_ALG_AUTH_TRUNC,   /* struct xfrm_algo_auth */
 299         XFRMA_MARK,             /* struct xfrm_mark */
 300         XFRMA_TFCPAD,           /* __u32 */
 301         XFRMA_REPLAY_ESN_VAL,   /* struct xfrm_replay_esn */
 302         XFRMA_SA_EXTRA_FLAGS,   /* __u32 */
 303         XFRMA_PROTO,            /* __u8 */
 304         XFRMA_ADDRESS_FILTER,   /* struct xfrm_address_filter */
 305         __XFRMA_MAX
 306
 307 #define XFRMA_MAX (__XFRMA_MAX - 1)
 308 };
 309
 310 struct xfrm_mark {
 311         __u32           v; /* value */
 312         __u32           m; /* mask */
 313 };
 314
 315 enum xfrm_sadattr_type_t {
 316         XFRMA_SAD_UNSPEC,
 317         XFRMA_SAD_CNT,
 318         XFRMA_SAD_HINFO,
 319         __XFRMA_SAD_MAX
 320
 321 #define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1)
 322 };
 323
 324 struct xfrmu_sadhinfo {
 325         __u32 sadhcnt; /* current hash bkts */
 326         __u32 sadhmcnt; /* max allowed hash bkts */
 327 };
 328
 329 enum xfrm_spdattr_type_t {
 330         XFRMA_SPD_UNSPEC,
 331         XFRMA_SPD_INFO,
 332         XFRMA_SPD_HINFO,
 333         XFRMA_SPD_IPV4_HTHRESH,
 334         XFRMA_SPD_IPV6_HTHRESH,
 335         __XFRMA_SPD_MAX
 336
 337 #define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1)
 338 };
 339
 340 struct xfrmu_spdinfo {
 341         __u32 incnt;
 342         __u32 outcnt;
 343         __u32 fwdcnt;
 344         __u32 inscnt;
 345         __u32 outscnt;
 346         __u32 fwdscnt;
 347 };
 348
 349 struct xfrmu_spdhinfo {
 350         __u32 spdhcnt;
 351         __u32 spdhmcnt;
 352 };
 353
 354 struct xfrmu_spdhthresh {
 355         __u8 lbits;
 356         __u8 rbits;
 357 };
 358
 359 struct xfrm_usersa_info {
 360         struct xfrm_selector            sel;
 361         struct xfrm_id                  id;
 362         xfrm_address_t                  saddr;
 363         struct xfrm_lifetime_cfg        lft;
 364         struct xfrm_lifetime_cur        curlft;
 365         struct xfrm_stats               stats;
 366         __u32                           seq;
 367         __u32                           reqid;
 368         __u16                           family;
 369         __u8                            mode;           /* XFRM_MODE_xxx */
 370         __u8                            replay_window;
 371         __u8                            flags;
 372 #define XFRM_STATE_NOECN        1
 373 #define XFRM_STATE_DECAP_DSCP   2
 374 #define XFRM_STATE_NOPMTUDISC   4
 375 #define XFRM_STATE_WILDRECV     8
 376 #define XFRM_STATE_ICMP         16
 377 #define XFRM_STATE_AF_UNSPEC    32
 378 #define XFRM_STATE_ALIGN4       64
 379 #define XFRM_STATE_ESN          128
 380 };
 381
 382 #define XFRM_SA_XFLAG_DONT_ENCAP_DSCP   1
 383
 384 struct xfrm_usersa_id {
 385         xfrm_address_t                  daddr;
 386         __be32                          spi;
 387         __u16                           family;
 388         __u8                            proto;
 389 };
 390
 391 struct xfrm_aevent_id {
 392         struct xfrm_usersa_id           sa_id;
 393         xfrm_address_t                  saddr;
 394         __u32                           flags;
 395         __u32                           reqid;
 396 };
 397
 398 struct xfrm_userspi_info {
 399         struct xfrm_usersa_info         info;
 400         __u32                           min;
 401         __u32                           max;
 402 };
 403
 404 struct xfrm_userpolicy_info {
 405         struct xfrm_selector            sel;
 406         struct xfrm_lifetime_cfg        lft;
 407         struct xfrm_lifetime_cur        curlft;
 408         __u32                           priority;
 409         __u32                           index;
 410         __u8                            dir;
 411         __u8                            action;
 412 #define XFRM_POLICY_ALLOW       0
 413 #define XFRM_POLICY_BLOCK       1
 414         __u8                            flags;
 415 #define XFRM_POLICY_LOCALOK     1       /* Allow user to override global policy */
 416         /* Automatically expand selector to include matching ICMP payloads. */
 417 #define XFRM_POLICY_ICMP        2
 418         __u8                            share;
 419 };
 420
 421 struct xfrm_userpolicy_id {
 422         struct xfrm_selector            sel;
 423         __u32                           index;
 424         __u8                            dir;
 425 };
 426
 427 struct xfrm_user_acquire {
 428         struct xfrm_id                  id;
 429         xfrm_address_t                  saddr;
 430         struct xfrm_selector            sel;
 431         struct xfrm_userpolicy_info     policy;
 432         __u32                           aalgos;
 433         __u32                           ealgos;
 434         __u32                           calgos;
 435         __u32                           seq;
 436 };
 437
 438 struct xfrm_user_expire {
 439         struct xfrm_usersa_info         state;
 440         __u8                            hard;
 441 };
 442
 443 struct xfrm_user_polexpire {
 444         struct xfrm_userpolicy_info     pol;
 445         __u8                            hard;
 446 };
 447
 448 struct xfrm_usersa_flush {
 449         __u8                            proto;
 450 };
 451
 452 struct xfrm_user_report {
 453         __u8                            proto;
 454         struct xfrm_selector            sel;
 455 };
 456
 457 /* Used by MIGRATE to pass addresses IKE should use to perform
 458  * SA negotiation with the peer */
 459 struct xfrm_user_kmaddress {
 460         xfrm_address_t                  local;
 461         xfrm_address_t                  remote;
 462         __u32                           reserved;
 463         __u16                           family;
 464 };
 465
 466 struct xfrm_user_migrate {
 467         xfrm_address_t                  old_daddr;
 468         xfrm_address_t                  old_saddr;
 469         xfrm_address_t                  new_daddr;
 470         xfrm_address_t                  new_saddr;
 471         __u8                            proto;
 472         __u8                            mode;
 473         __u16                           reserved;
 474         __u32                           reqid;
 475         __u16                           old_family;
 476         __u16                           new_family;
 477 };
 478
 479 struct xfrm_user_mapping {
 480         struct xfrm_usersa_id           id;
 481         __u32                           reqid;
 482         xfrm_address_t                  old_saddr;
 483         xfrm_address_t                  new_saddr;
 484         __be16                          old_sport;
 485         __be16                          new_sport;
 486 };
 487
 488 struct xfrm_address_filter {
 489         xfrm_address_t                  saddr;
 490         xfrm_address_t                  daddr;
 491         __u16                           family;
 492         __u8                            splen;
 493         __u8                            dplen;
 494 };
 495
 496 /* backwards compatibility for userspace */
 497 #define XFRMGRP_ACQUIRE         1
 498 #define XFRMGRP_EXPIRE          2
 499 #define XFRMGRP_SA              4
 500 #define XFRMGRP_POLICY          8
 501 #define XFRMGRP_REPORT          0x20
 502
 503 enum xfrm_nlgroups {
 504         XFRMNLGRP_NONE,
 505 #define XFRMNLGRP_NONE          XFRMNLGRP_NONE
 506         XFRMNLGRP_ACQUIRE,
 507 #define XFRMNLGRP_ACQUIRE       XFRMNLGRP_ACQUIRE
 508         XFRMNLGRP_EXPIRE,
 509 #define XFRMNLGRP_EXPIRE        XFRMNLGRP_EXPIRE
 510         XFRMNLGRP_SA,
 511 #define XFRMNLGRP_SA            XFRMNLGRP_SA
 512         XFRMNLGRP_POLICY,
 513 #define XFRMNLGRP_POLICY        XFRMNLGRP_POLICY
 514         XFRMNLGRP_AEVENTS,
 515 #define XFRMNLGRP_AEVENTS       XFRMNLGRP_AEVENTS
 516         XFRMNLGRP_REPORT,
 517 #define XFRMNLGRP_REPORT        XFRMNLGRP_REPORT
 518         XFRMNLGRP_MIGRATE,
 519 #define XFRMNLGRP_MIGRATE       XFRMNLGRP_MIGRATE
 520         XFRMNLGRP_MAPPING,
 521 #define XFRMNLGRP_MAPPING       XFRMNLGRP_MAPPING
 522         __XFRMNLGRP_MAX
 523 };
 524 #define XFRMNLGRP_MAX   (__XFRMNLGRP_MAX - 1)
 525
 526 #endif /* _LINUX_XFRM_H */