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_MAX 4
 133
 134 /* Netlink configuration messages.  */
 135 enum {
 136         XFRM_MSG_BASE = 0x10,
 137
 138         XFRM_MSG_NEWSA = 0x10,
 139 #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA
 140         XFRM_MSG_DELSA,
 141 #define XFRM_MSG_DELSA XFRM_MSG_DELSA
 142         XFRM_MSG_GETSA,
 143 #define XFRM_MSG_GETSA XFRM_MSG_GETSA
 144
 145         XFRM_MSG_NEWPOLICY,
 146 #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY
 147         XFRM_MSG_DELPOLICY,
 148 #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY
 149         XFRM_MSG_GETPOLICY,
 150 #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY
 151
 152         XFRM_MSG_ALLOCSPI,
 153 #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI
 154         XFRM_MSG_ACQUIRE,
 155 #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE
 156         XFRM_MSG_EXPIRE,
 157 #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE
 158
 159         XFRM_MSG_UPDPOLICY,
 160 #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY
 161         XFRM_MSG_UPDSA,
 162 #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA
 163
 164         XFRM_MSG_POLEXPIRE,
 165 #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE
 166
 167         XFRM_MSG_FLUSHSA,
 168 #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA
 169         XFRM_MSG_FLUSHPOLICY,
 170 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
 171
 172         XFRM_MSG_NEWAE,
 173 #define XFRM_MSG_NEWAE XFRM_MSG_NEWAE
 174         XFRM_MSG_GETAE,
 175 #define XFRM_MSG_GETAE XFRM_MSG_GETAE
 176
 177         XFRM_MSG_REPORT,
 178 #define XFRM_MSG_REPORT XFRM_MSG_REPORT
 179
 180         __XFRM_MSG_MAX
 181 };
 182 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
 183
 184 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
 185
 186 /*
 187  * Generic LSM security context for comunicating to user space
 188  * NOTE: Same format as sadb_x_sec_ctx
 189  */
 190 struct xfrm_user_sec_ctx {
 191         __u16                   len;
 192         __u16                   exttype;
 193         __u8                    ctx_alg;  /* LSMs: e.g., selinux == 1 */
 194         __u8                    ctx_doi;
 195         __u16                   ctx_len;
 196 };
 197
 198 struct xfrm_user_tmpl {
 199         struct xfrm_id          id;
 200         __u16                   family;
 201         xfrm_address_t          saddr;
 202         __u32                   reqid;
 203         __u8                    mode;
 204         __u8                    share;
 205         __u8                    optional;
 206         __u32                   aalgos;
 207         __u32                   ealgos;
 208         __u32                   calgos;
 209 };
 210
 211 struct xfrm_encap_tmpl {
 212         __u16           encap_type;
 213         __u16           encap_sport;
 214         __u16           encap_dport;
 215         xfrm_address_t  encap_oa;
 216 };
 217
 218 /* AEVENT flags  */
 219 enum xfrm_ae_ftype_t {
 220         XFRM_AE_UNSPEC,
 221         XFRM_AE_RTHR=1, /* replay threshold*/
 222         XFRM_AE_RVAL=2, /* replay value */
 223         XFRM_AE_LVAL=4, /* lifetime value */
 224         XFRM_AE_ETHR=8, /* expiry timer threshold */
 225         XFRM_AE_CR=16, /* Event cause is replay update */
 226         XFRM_AE_CE=32, /* Event cause is timer expiry */
 227         XFRM_AE_CU=64, /* Event cause is policy update */
 228         __XFRM_AE_MAX
 229
 230 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1)
 231 };
 232
 233 struct xfrm_userpolicy_type {
 234         __u8            type;
 235         __u16           reserved1;
 236         __u8            reserved2;
 237 };
 238
 239 /* Netlink message attributes.  */
 240 enum xfrm_attr_type_t {
 241         XFRMA_UNSPEC,
 242         XFRMA_ALG_AUTH,         /* struct xfrm_algo */
 243         XFRMA_ALG_CRYPT,        /* struct xfrm_algo */
 244         XFRMA_ALG_COMP,         /* struct xfrm_algo */
 245         XFRMA_ENCAP,            /* struct xfrm_algo + struct xfrm_encap_tmpl */
 246         XFRMA_TMPL,             /* 1 or more struct xfrm_user_tmpl */
 247         XFRMA_SA,
 248         XFRMA_POLICY,
 249         XFRMA_SEC_CTX,          /* struct xfrm_sec_ctx */
 250         XFRMA_LTIME_VAL,
 251         XFRMA_REPLAY_VAL,
 252         XFRMA_REPLAY_THRESH,
 253         XFRMA_ETIMER_THRESH,
 254         XFRMA_SRCADDR,          /* xfrm_address_t */
 255         XFRMA_COADDR,           /* xfrm_address_t */
 256         XFRMA_LASTUSED,
 257         XFRMA_POLICY_TYPE,      /* struct xfrm_userpolicy_type */
 258         __XFRMA_MAX
 259
 260 #define XFRMA_MAX (__XFRMA_MAX - 1)
 261 };
 262
 263 struct xfrm_usersa_info {
 264         struct xfrm_selector            sel;
 265         struct xfrm_id                  id;
 266         xfrm_address_t                  saddr;
 267         struct xfrm_lifetime_cfg        lft;
 268         struct xfrm_lifetime_cur        curlft;
 269         struct xfrm_stats               stats;
 270         __u32                           seq;
 271         __u32                           reqid;
 272         __u16                           family;
 273         __u8                            mode;           /* XFRM_MODE_xxx */
 274         __u8                            replay_window;
 275         __u8                            flags;
 276 #define XFRM_STATE_NOECN        1
 277 #define XFRM_STATE_DECAP_DSCP   2
 278 #define XFRM_STATE_NOPMTUDISC   4
 279 #define XFRM_STATE_WILDRECV     8
 280 };
 281
 282 struct xfrm_usersa_id {
 283         xfrm_address_t                  daddr;
 284         __be32                          spi;
 285         __u16                           family;
 286         __u8                            proto;
 287 };
 288
 289 struct xfrm_aevent_id {
 290         struct xfrm_usersa_id           sa_id;
 291         __u32                           flags;
 292 };
 293
 294 struct xfrm_userspi_info {
 295         struct xfrm_usersa_info         info;
 296         __u32                           min;
 297         __u32                           max;
 298 };
 299
 300 struct xfrm_userpolicy_info {
 301         struct xfrm_selector            sel;
 302         struct xfrm_lifetime_cfg        lft;
 303         struct xfrm_lifetime_cur        curlft;
 304         __u32                           priority;
 305         __u32                           index;
 306         __u8                            dir;
 307         __u8                            action;
 308 #define XFRM_POLICY_ALLOW       0
 309 #define XFRM_POLICY_BLOCK       1
 310         __u8                            flags;
 311 #define XFRM_POLICY_LOCALOK     1       /* Allow user to override global policy */
 312         __u8                            share;
 313 };
 314
 315 struct xfrm_userpolicy_id {
 316         struct xfrm_selector            sel;
 317         __u32                           index;
 318         __u8                            dir;
 319 };
 320
 321 struct xfrm_user_acquire {
 322         struct xfrm_id                  id;
 323         xfrm_address_t                  saddr;
 324         struct xfrm_selector            sel;
 325         struct xfrm_userpolicy_info     policy;
 326         __u32                           aalgos;
 327         __u32                           ealgos;
 328         __u32                           calgos;
 329         __u32                           seq;
 330 };
 331
 332 struct xfrm_user_expire {
 333         struct xfrm_usersa_info         state;
 334         __u8                            hard;
 335 };
 336
 337 struct xfrm_user_polexpire {
 338         struct xfrm_userpolicy_info     pol;
 339         __u8                            hard;
 340 };
 341
 342 struct xfrm_usersa_flush {
 343         __u8                            proto;
 344 };
 345
 346 struct xfrm_user_report {
 347         __u8                            proto;
 348         struct xfrm_selector            sel;
 349 };
 350
 351 #ifndef __KERNEL__
 352 /* backwards compatibility for userspace */
 353 #define XFRMGRP_ACQUIRE         1
 354 #define XFRMGRP_EXPIRE          2
 355 #define XFRMGRP_SA              4
 356 #define XFRMGRP_POLICY          8
 357 #define XFRMGRP_REPORT          0x10
 358 #endif
 359
 360 enum xfrm_nlgroups {
 361         XFRMNLGRP_NONE,
 362 #define XFRMNLGRP_NONE          XFRMNLGRP_NONE
 363         XFRMNLGRP_ACQUIRE,
 364 #define XFRMNLGRP_ACQUIRE       XFRMNLGRP_ACQUIRE
 365         XFRMNLGRP_EXPIRE,
 366 #define XFRMNLGRP_EXPIRE        XFRMNLGRP_EXPIRE
 367         XFRMNLGRP_SA,
 368 #define XFRMNLGRP_SA            XFRMNLGRP_SA
 369         XFRMNLGRP_POLICY,
 370 #define XFRMNLGRP_POLICY        XFRMNLGRP_POLICY
 371         XFRMNLGRP_AEVENTS,
 372 #define XFRMNLGRP_AEVENTS       XFRMNLGRP_AEVENTS
 373         XFRMNLGRP_REPORT,
 374 #define XFRMNLGRP_REPORT        XFRMNLGRP_REPORT
 375         __XFRMNLGRP_MAX
 376 };
 377 #define XFRMNLGRP_MAX   (__XFRMNLGRP_MAX - 1)
 378
 379 #endif /* _LINUX_XFRM_H */