LXR linux/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 */
  13typedef 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 */
  22struct xfrm_id {
  23        xfrm_address_t  daddr;
  24        __be32          spi;
  25        __u8            proto;
  26};
  27
  28struct 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
  46struct 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
  63struct 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
  74struct xfrm_lifetime_cur {
  75        __u64   bytes;
  76        __u64   packets;
  77        __u64   add_time;
  78        __u64   use_time;
  79};
  80
  81struct xfrm_replay_state {
  82        __u32   oseq;
  83        __u32   seq;
  84        __u32   bitmap;
  85};
  86
  87struct xfrm_algo {
  88        char            alg_name[64];
  89        unsigned int    alg_key_len;    /* in bits */
  90        char            alg_key[0];
  91};
  92
  93struct xfrm_algo_auth {
  94        char            alg_name[64];
  95        unsigned int    alg_key_len;    /* in bits */
  96        unsigned int    alg_trunc_len;  /* in bits */
  97        char            alg_key[0];
  98};
  99
 100struct xfrm_algo_aead {
 101        char            alg_name[64];
 102        unsigned int    alg_key_len;    /* in bits */
 103        unsigned int    alg_icv_len;    /* in bits */
 104        char            alg_key[0];
 105};
 106
 107struct xfrm_stats {
 108        __u32   replay_window;
 109        __u32   replay;
 110        __u32   integrity_failed;
 111};
 112
 113enum {
 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
 120enum {
 121        XFRM_POLICY_IN  = 0,
 122        XFRM_POLICY_OUT = 1,
 123        XFRM_POLICY_FWD = 2,
 124        XFRM_POLICY_MASK = 3,
 125        XFRM_POLICY_MAX = 3
 126};
 127
 128enum {
 129        XFRM_SHARE_ANY,         /* No limitations */
 130        XFRM_SHARE_SESSION,     /* For this session only */
 131        XFRM_SHARE_USER,        /* For this user only */
 132        XFRM_SHARE_UNIQUE       /* Use once */
 133};
 134
 135#define XFRM_MODE_TRANSPORT 0
 136#define XFRM_MODE_TUNNEL 1
 137#define XFRM_MODE_ROUTEOPTIMIZATION 2
 138#define XFRM_MODE_IN_TRIGGER 3
 139#define XFRM_MODE_BEET 4
 140#define XFRM_MODE_MAX 5
 141
 142/* Netlink configuration messages.  */
 143enum {
 144        XFRM_MSG_BASE = 0x10,
 145
 146        XFRM_MSG_NEWSA = 0x10,
 147#define XFRM_MSG_NEWSA XFRM_MSG_NEWSA
 148        XFRM_MSG_DELSA,
 149#define XFRM_MSG_DELSA XFRM_MSG_DELSA
 150        XFRM_MSG_GETSA,
 151#define XFRM_MSG_GETSA XFRM_MSG_GETSA
 152
 153        XFRM_MSG_NEWPOLICY,
 154#define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY
 155        XFRM_MSG_DELPOLICY,
 156#define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY
 157        XFRM_MSG_GETPOLICY,
 158#define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY
 159
 160        XFRM_MSG_ALLOCSPI,
 161#define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI
 162        XFRM_MSG_ACQUIRE,
 163#define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE
 164        XFRM_MSG_EXPIRE,
 165#define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE
 166
 167        XFRM_MSG_UPDPOLICY,
 168#define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY
 169        XFRM_MSG_UPDSA,
 170#define XFRM_MSG_UPDSA XFRM_MSG_UPDSA
 171
 172        XFRM_MSG_POLEXPIRE,
 173#define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE
 174
 175        XFRM_MSG_FLUSHSA,
 176#define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA
 177        XFRM_MSG_FLUSHPOLICY,
 178#define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
 179
 180        XFRM_MSG_NEWAE,
 181#define XFRM_MSG_NEWAE XFRM_MSG_NEWAE
 182        XFRM_MSG_GETAE,
 183#define XFRM_MSG_GETAE XFRM_MSG_GETAE
 184
 185        XFRM_MSG_REPORT,
 186#define XFRM_MSG_REPORT XFRM_MSG_REPORT
 187
 188        XFRM_MSG_MIGRATE,
 189#define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE
 190
 191        XFRM_MSG_NEWSADINFO,
 192#define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO
 193        XFRM_MSG_GETSADINFO,
 194#define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO
 195
 196        XFRM_MSG_NEWSPDINFO,
 197#define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO
 198        XFRM_MSG_GETSPDINFO,
 199#define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO
 200
 201        XFRM_MSG_MAPPING,
 202#define XFRM_MSG_MAPPING XFRM_MSG_MAPPING
 203        __XFRM_MSG_MAX
 204};
 205#define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
 206
 207#define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
 208
 209/*
 210 * Generic LSM security context for comunicating to user space
 211 * NOTE: Same format as sadb_x_sec_ctx
 212 */
 213struct xfrm_user_sec_ctx {
 214        __u16                   len;
 215        __u16                   exttype;
 216        __u8                    ctx_alg;  /* LSMs: e.g., selinux == 1 */
 217        __u8                    ctx_doi;
 218        __u16                   ctx_len;
 219};
 220
 221struct xfrm_user_tmpl {
 222        struct xfrm_id          id;
 223        __u16                   family;
 224        xfrm_address_t          saddr;
 225        __u32                   reqid;
 226        __u8                    mode;
 227        __u8                    share;
 228        __u8                    optional;
 229        __u32                   aalgos;
 230        __u32                   ealgos;
 231        __u32                   calgos;
 232};
 233
 234struct xfrm_encap_tmpl {
 235        __u16           encap_type;
 236        __be16          encap_sport;
 237        __be16          encap_dport;
 238        xfrm_address_t  encap_oa;
 239};
 240
 241/* AEVENT flags  */
 242enum xfrm_ae_ftype_t {
 243        XFRM_AE_UNSPEC,
 244        XFRM_AE_RTHR=1, /* replay threshold*/
 245        XFRM_AE_RVAL=2, /* replay value */
 246        XFRM_AE_LVAL=4, /* lifetime value */
 247        XFRM_AE_ETHR=8, /* expiry timer threshold */
 248        XFRM_AE_CR=16, /* Event cause is replay update */
 249        XFRM_AE_CE=32, /* Event cause is timer expiry */
 250        XFRM_AE_CU=64, /* Event cause is policy update */
 251        __XFRM_AE_MAX
 252
 253#define XFRM_AE_MAX (__XFRM_AE_MAX - 1)
 254};
 255
 256struct xfrm_userpolicy_type {
 257        __u8            type;
 258        __u16           reserved1;
 259        __u8            reserved2;
 260};
 261
 262/* Netlink message attributes.  */
 263enum xfrm_attr_type_t {
 264        XFRMA_UNSPEC,
 265        XFRMA_ALG_AUTH,         /* struct xfrm_algo */
 266        XFRMA_ALG_CRYPT,        /* struct xfrm_algo */
 267        XFRMA_ALG_COMP,         /* struct xfrm_algo */
 268        XFRMA_ENCAP,            /* struct xfrm_algo + struct xfrm_encap_tmpl */
 269        XFRMA_TMPL,             /* 1 or more struct xfrm_user_tmpl */
 270        XFRMA_SA,               /* struct xfrm_usersa_info  */
 271        XFRMA_POLICY,           /*struct xfrm_userpolicy_info */
 272        XFRMA_SEC_CTX,          /* struct xfrm_sec_ctx */
 273        XFRMA_LTIME_VAL,
 274        XFRMA_REPLAY_VAL,
 275        XFRMA_REPLAY_THRESH,
 276        XFRMA_ETIMER_THRESH,
 277        XFRMA_SRCADDR,          /* xfrm_address_t */
 278        XFRMA_COADDR,           /* xfrm_address_t */
 279        XFRMA_LASTUSED,         /* unsigned long  */
 280        XFRMA_POLICY_TYPE,      /* struct xfrm_userpolicy_type */
 281        XFRMA_MIGRATE,
 282        XFRMA_ALG_AEAD,         /* struct xfrm_algo_aead */
 283        XFRMA_KMADDRESS,        /* struct xfrm_user_kmaddress */
 284        XFRMA_ALG_AUTH_TRUNC,   /* struct xfrm_algo_auth */
 285        XFRMA_MARK,             /* struct xfrm_mark */
 286        XFRMA_TFCPAD,           /* __u32 */
 287        __XFRMA_MAX
 288
 289#define XFRMA_MAX (__XFRMA_MAX - 1)
 290};
 291
 292struct xfrm_mark {
 293        __u32           v; /* value */
 294        __u32           m; /* mask */
 295};
 296
 297enum xfrm_sadattr_type_t {
 298        XFRMA_SAD_UNSPEC,
 299        XFRMA_SAD_CNT,
 300        XFRMA_SAD_HINFO,
 301        __XFRMA_SAD_MAX
 302
 303#define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1)
 304};
 305
 306struct xfrmu_sadhinfo {
 307        __u32 sadhcnt; /* current hash bkts */
 308        __u32 sadhmcnt; /* max allowed hash bkts */
 309};
 310
 311enum xfrm_spdattr_type_t {
 312        XFRMA_SPD_UNSPEC,
 313        XFRMA_SPD_INFO,
 314        XFRMA_SPD_HINFO,
 315        __XFRMA_SPD_MAX
 316
 317#define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1)
 318};
 319
 320struct xfrmu_spdinfo {
 321        __u32 incnt;
 322        __u32 outcnt;
 323        __u32 fwdcnt;
 324        __u32 inscnt;
 325        __u32 outscnt;
 326        __u32 fwdscnt;
 327};
 328
 329struct xfrmu_spdhinfo {
 330        __u32 spdhcnt;
 331        __u32 spdhmcnt;
 332};
 333
 334struct xfrm_usersa_info {
 335        struct xfrm_selector            sel;
 336        struct xfrm_id                  id;
 337        xfrm_address_t                  saddr;
 338        struct xfrm_lifetime_cfg        lft;
 339        struct xfrm_lifetime_cur        curlft;
 340        struct xfrm_stats               stats;
 341        __u32                           seq;
 342        __u32                           reqid;
 343        __u16                           family;
 344        __u8                            mode;           /* XFRM_MODE_xxx */
 345        __u8                            replay_window;
 346        __u8                            flags;
 347#define XFRM_STATE_NOECN        1
 348#define XFRM_STATE_DECAP_DSCP   2
 349#define XFRM_STATE_NOPMTUDISC   4
 350#define XFRM_STATE_WILDRECV     8
 351#define XFRM_STATE_ICMP         16
 352#define XFRM_STATE_AF_UNSPEC    32
 353};
 354
 355struct xfrm_usersa_id {
 356        xfrm_address_t                  daddr;
 357        __be32                          spi;
 358        __u16                           family;
 359        __u8                            proto;
 360};
 361
 362struct xfrm_aevent_id {
 363        struct xfrm_usersa_id           sa_id;
 364        xfrm_address_t                  saddr;
 365        __u32                           flags;
 366        __u32                           reqid;
 367};
 368
 369struct xfrm_userspi_info {
 370        struct xfrm_usersa_info         info;
 371        __u32                           min;
 372        __u32                           max;
 373};
 374
 375struct xfrm_userpolicy_info {
 376        struct xfrm_selector            sel;
 377        struct xfrm_lifetime_cfg        lft;
 378        struct xfrm_lifetime_cur        curlft;
 379        __u32                           priority;
 380        __u32                           index;
 381        __u8                            dir;
 382        __u8                            action;
 383#define XFRM_POLICY_ALLOW       0
 384#define XFRM_POLICY_BLOCK       1
 385        __u8                            flags;
 386#define XFRM_POLICY_LOCALOK     1       /* Allow user to override global policy */
 387        /* Automatically expand selector to include matching ICMP payloads. */
 388#define XFRM_POLICY_ICMP        2
 389        __u8                            share;
 390};
 391
 392struct xfrm_userpolicy_id {
 393        struct xfrm_selector            sel;
 394        __u32                           index;
 395        __u8                            dir;
 396};
 397
 398struct xfrm_user_acquire {
 399        struct xfrm_id                  id;
 400        xfrm_address_t                  saddr;
 401        struct xfrm_selector            sel;
 402        struct xfrm_userpolicy_info     policy;
 403        __u32                           aalgos;
 404        __u32                           ealgos;
 405        __u32                           calgos;
 406        __u32                           seq;
 407};
 408
 409struct xfrm_user_expire {
 410        struct xfrm_usersa_info         state;
 411        __u8                            hard;
 412};
 413
 414struct xfrm_user_polexpire {
 415        struct xfrm_userpolicy_info     pol;
 416        __u8                            hard;
 417};
 418
 419struct xfrm_usersa_flush {
 420        __u8                            proto;
 421};
 422
 423struct xfrm_user_report {
 424        __u8                            proto;
 425        struct xfrm_selector            sel;
 426};
 427
 428/* Used by MIGRATE to pass addresses IKE should use to perform
 429 * SA negotiation with the peer */
 430struct xfrm_user_kmaddress {
 431        xfrm_address_t                  local;
 432        xfrm_address_t                  remote;
 433        __u32                           reserved;
 434        __u16                           family;
 435};
 436
 437struct xfrm_user_migrate {
 438        xfrm_address_t                  old_daddr;
 439        xfrm_address_t                  old_saddr;
 440        xfrm_address_t                  new_daddr;
 441        xfrm_address_t                  new_saddr;
 442        __u8                            proto;
 443        __u8                            mode;
 444        __u16                           reserved;
 445        __u32                           reqid;
 446        __u16                           old_family;
 447        __u16                           new_family;
 448};
 449
 450struct xfrm_user_mapping {
 451        struct xfrm_usersa_id           id;
 452        __u32                           reqid;
 453        xfrm_address_t                  old_saddr;
 454        xfrm_address_t                  new_saddr;
 455        __be16                          old_sport;
 456        __be16                          new_sport;
 457};
 458
 459#ifndef __KERNEL__
 460/* backwards compatibility for userspace */
 461#define XFRMGRP_ACQUIRE         1
 462#define XFRMGRP_EXPIRE          2
 463#define XFRMGRP_SA              4
 464#define XFRMGRP_POLICY          8
 465#define XFRMGRP_REPORT          0x20
 466#endif
 467
 468enum xfrm_nlgroups {
 469        XFRMNLGRP_NONE,
 470#define XFRMNLGRP_NONE          XFRMNLGRP_NONE
 471        XFRMNLGRP_ACQUIRE,
 472#define XFRMNLGRP_ACQUIRE       XFRMNLGRP_ACQUIRE
 473        XFRMNLGRP_EXPIRE,
 474#define XFRMNLGRP_EXPIRE        XFRMNLGRP_EXPIRE
 475        XFRMNLGRP_SA,
 476#define XFRMNLGRP_SA            XFRMNLGRP_SA
 477        XFRMNLGRP_POLICY,
 478#define XFRMNLGRP_POLICY        XFRMNLGRP_POLICY
 479        XFRMNLGRP_AEVENTS,
 480#define XFRMNLGRP_AEVENTS       XFRMNLGRP_AEVENTS
 481        XFRMNLGRP_REPORT,
 482#define XFRMNLGRP_REPORT        XFRMNLGRP_REPORT
 483        XFRMNLGRP_MIGRATE,
 484#define XFRMNLGRP_MIGRATE       XFRMNLGRP_MIGRATE
 485        XFRMNLGRP_MAPPING,
 486#define XFRMNLGRP_MAPPING       XFRMNLGRP_MAPPING
 487        __XFRMNLGRP_MAX
 488};
 489#define XFRMNLGRP_MAX   (__XFRMNLGRP_MAX - 1)
 490
 491#endif /* _LINUX_XFRM_H */
 492