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         __u32           a4;
  16         __u32           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         __u32           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         __u16   dport;
  53         __u16   dport_mask;
  54         __u16   sport;
  55         __u16   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_IN  = 0,
 108         XFRM_POLICY_OUT = 1,
 109         XFRM_POLICY_FWD = 2,
 110         XFRM_POLICY_MAX = 3
 111 };
 112
 113 enum
 114 {
 115         XFRM_SHARE_ANY,         /* No limitations */
 116         XFRM_SHARE_SESSION,     /* For this session only */
 117         XFRM_SHARE_USER,        /* For this user only */
 118         XFRM_SHARE_UNIQUE       /* Use once */
 119 };
 120
 121 #define XFRM_MODE_TRANSPORT 0
 122 #define XFRM_MODE_TUNNEL 1
 123 #define XFRM_MODE_ROUTEOPTIMIZATION 2
 124 #define XFRM_MODE_IN_TRIGGER 3
 125 #define XFRM_MODE_MAX 4
 126
 127 /* Netlink configuration messages.  */
 128 enum {
 129         XFRM_MSG_BASE = 0x10,
 130
 131         XFRM_MSG_NEWSA = 0x10,
 132 #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA
 133         XFRM_MSG_DELSA,
 134 #define XFRM_MSG_DELSA XFRM_MSG_DELSA
 135         XFRM_MSG_GETSA,
 136 #define XFRM_MSG_GETSA XFRM_MSG_GETSA
 137
 138         XFRM_MSG_NEWPOLICY,
 139 #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY
 140         XFRM_MSG_DELPOLICY,
 141 #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY
 142         XFRM_MSG_GETPOLICY,
 143 #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY
 144
 145         XFRM_MSG_ALLOCSPI,
 146 #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI
 147         XFRM_MSG_ACQUIRE,
 148 #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE
 149         XFRM_MSG_EXPIRE,
 150 #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE
 151
 152         XFRM_MSG_UPDPOLICY,
 153 #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY
 154         XFRM_MSG_UPDSA,
 155 #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA
 156
 157         XFRM_MSG_POLEXPIRE,
 158 #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE
 159
 160         XFRM_MSG_FLUSHSA,
 161 #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA
 162         XFRM_MSG_FLUSHPOLICY,
 163 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
 164
 165         XFRM_MSG_NEWAE,
 166 #define XFRM_MSG_NEWAE XFRM_MSG_NEWAE
 167         XFRM_MSG_GETAE,
 168 #define XFRM_MSG_GETAE XFRM_MSG_GETAE
 169         __XFRM_MSG_MAX
 170 };
 171 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
 172
 173 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
 174
 175 /*
 176  * Generic LSM security context for comunicating to user space
 177  * NOTE: Same format as sadb_x_sec_ctx
 178  */
 179 struct xfrm_user_sec_ctx {
 180         __u16                   len;
 181         __u16                   exttype;
 182         __u8                    ctx_alg;  /* LSMs: e.g., selinux == 1 */
 183         __u8                    ctx_doi;
 184         __u16                   ctx_len;
 185 };
 186
 187 struct xfrm_user_tmpl {
 188         struct xfrm_id          id;
 189         __u16                   family;
 190         xfrm_address_t          saddr;
 191         __u32                   reqid;
 192         __u8                    mode;
 193         __u8                    share;
 194         __u8                    optional;
 195         __u32                   aalgos;
 196         __u32                   ealgos;
 197         __u32                   calgos;
 198 };
 199
 200 struct xfrm_encap_tmpl {
 201         __u16           encap_type;
 202         __u16           encap_sport;
 203         __u16           encap_dport;
 204         xfrm_address_t  encap_oa;
 205 };
 206
 207 /* AEVENT flags  */
 208 enum xfrm_ae_ftype_t {
 209         XFRM_AE_UNSPEC,
 210         XFRM_AE_RTHR=1, /* replay threshold*/
 211         XFRM_AE_RVAL=2, /* replay value */
 212         XFRM_AE_LVAL=4, /* lifetime value */
 213         XFRM_AE_ETHR=8, /* expiry timer threshold */
 214         XFRM_AE_CR=16, /* Event cause is replay update */
 215         XFRM_AE_CE=32, /* Event cause is timer expiry */
 216         XFRM_AE_CU=64, /* Event cause is policy update */
 217         __XFRM_AE_MAX
 218
 219 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1)
 220 };
 221
 222 /* Netlink message attributes.  */
 223 enum xfrm_attr_type_t {
 224         XFRMA_UNSPEC,
 225         XFRMA_ALG_AUTH,         /* struct xfrm_algo */
 226         XFRMA_ALG_CRYPT,        /* struct xfrm_algo */
 227         XFRMA_ALG_COMP,         /* struct xfrm_algo */
 228         XFRMA_ENCAP,            /* struct xfrm_algo + struct xfrm_encap_tmpl */
 229         XFRMA_TMPL,             /* 1 or more struct xfrm_user_tmpl */
 230         XFRMA_SA,
 231         XFRMA_POLICY,
 232         XFRMA_SEC_CTX,          /* struct xfrm_sec_ctx */
 233         XFRMA_LTIME_VAL,
 234         XFRMA_REPLAY_VAL,
 235         XFRMA_REPLAY_THRESH,
 236         XFRMA_ETIMER_THRESH,
 237         XFRMA_SRCADDR,          /* xfrm_address_t */
 238         __XFRMA_MAX
 239
 240 #define XFRMA_MAX (__XFRMA_MAX - 1)
 241 };
 242
 243 struct xfrm_usersa_info {
 244         struct xfrm_selector            sel;
 245         struct xfrm_id                  id;
 246         xfrm_address_t                  saddr;
 247         struct xfrm_lifetime_cfg        lft;
 248         struct xfrm_lifetime_cur        curlft;
 249         struct xfrm_stats               stats;
 250         __u32                           seq;
 251         __u32                           reqid;
 252         __u16                           family;
 253         __u8                            mode;           /* XFRM_MODE_xxx */
 254         __u8                            replay_window;
 255         __u8                            flags;
 256 #define XFRM_STATE_NOECN        1
 257 #define XFRM_STATE_DECAP_DSCP   2
 258 #define XFRM_STATE_NOPMTUDISC   4
 259 };
 260
 261 struct xfrm_usersa_id {
 262         xfrm_address_t                  daddr;
 263         __u32                           spi;
 264         __u16                           family;
 265         __u8                            proto;
 266 };
 267
 268 struct xfrm_aevent_id {
 269         struct xfrm_usersa_id           sa_id;
 270         __u32                           flags;
 271 };
 272
 273 struct xfrm_userspi_info {
 274         struct xfrm_usersa_info         info;
 275         __u32                           min;
 276         __u32                           max;
 277 };
 278
 279 struct xfrm_userpolicy_info {
 280         struct xfrm_selector            sel;
 281         struct xfrm_lifetime_cfg        lft;
 282         struct xfrm_lifetime_cur        curlft;
 283         __u32                           priority;
 284         __u32                           index;
 285         __u8                            dir;
 286         __u8                            action;
 287 #define XFRM_POLICY_ALLOW       0
 288 #define XFRM_POLICY_BLOCK       1
 289         __u8                            flags;
 290 #define XFRM_POLICY_LOCALOK     1       /* Allow user to override global policy */
 291         __u8                            share;
 292 };
 293
 294 struct xfrm_userpolicy_id {
 295         struct xfrm_selector            sel;
 296         __u32                           index;
 297         __u8                            dir;
 298 };
 299
 300 struct xfrm_user_acquire {
 301         struct xfrm_id                  id;
 302         xfrm_address_t                  saddr;
 303         struct xfrm_selector            sel;
 304         struct xfrm_userpolicy_info     policy;
 305         __u32                           aalgos;
 306         __u32                           ealgos;
 307         __u32                           calgos;
 308         __u32                           seq;
 309 };
 310
 311 struct xfrm_user_expire {
 312         struct xfrm_usersa_info         state;
 313         __u8                            hard;
 314 };
 315
 316 struct xfrm_user_polexpire {
 317         struct xfrm_userpolicy_info     pol;
 318         __u8                            hard;
 319 };
 320
 321 struct xfrm_usersa_flush {
 322         __u8                            proto;
 323 };
 324
 325 #ifndef __KERNEL__
 326 /* backwards compatibility for userspace */
 327 #define XFRMGRP_ACQUIRE         1
 328 #define XFRMGRP_EXPIRE          2
 329 #define XFRMGRP_SA              4
 330 #define XFRMGRP_POLICY          8
 331 #endif
 332
 333 enum xfrm_nlgroups {
 334         XFRMNLGRP_NONE,
 335 #define XFRMNLGRP_NONE          XFRMNLGRP_NONE
 336         XFRMNLGRP_ACQUIRE,
 337 #define XFRMNLGRP_ACQUIRE       XFRMNLGRP_ACQUIRE
 338         XFRMNLGRP_EXPIRE,
 339 #define XFRMNLGRP_EXPIRE        XFRMNLGRP_EXPIRE
 340         XFRMNLGRP_SA,
 341 #define XFRMNLGRP_SA            XFRMNLGRP_SA
 342         XFRMNLGRP_POLICY,
 343 #define XFRMNLGRP_POLICY        XFRMNLGRP_POLICY
 344         XFRMNLGRP_AEVENTS,
 345 #define XFRMNLGRP_AEVENTS       XFRMNLGRP_AEVENTS
 346         __XFRMNLGRP_MAX
 347 };
 348 #define XFRMNLGRP_MAX   (__XFRMNLGRP_MAX - 1)
 349
 350 #endif /* _LINUX_XFRM_H */