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_MAX
 182 };
 183 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
 184
 185 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
 186
 187 /*
 188  * Generic LSM security context for comunicating to user space
 189  * NOTE: Same format as sadb_x_sec_ctx
 190  */
 191 struct xfrm_user_sec_ctx {
 192         __u16                   len;
 193         __u16                   exttype;
 194         __u8                    ctx_alg;  /* LSMs: e.g., selinux == 1 */
 195         __u8                    ctx_doi;
 196         __u16                   ctx_len;
 197 };
 198
 199 struct xfrm_user_tmpl {
 200         struct xfrm_id          id;
 201         __u16                   family;
 202         xfrm_address_t          saddr;
 203         __u32                   reqid;
 204         __u8                    mode;
 205         __u8                    share;
 206         __u8                    optional;
 207         __u32                   aalgos;
 208         __u32                   ealgos;
 209         __u32                   calgos;
 210 };
 211
 212 struct xfrm_encap_tmpl {
 213         __u16           encap_type;
 214         __be16          encap_sport;
 215         __be16          encap_dport;
 216         xfrm_address_t  encap_oa;
 217 };
 218
 219 /* AEVENT flags  */
 220 enum xfrm_ae_ftype_t {
 221         XFRM_AE_UNSPEC,
 222         XFRM_AE_RTHR=1, /* replay threshold*/
 223         XFRM_AE_RVAL=2, /* replay value */
 224         XFRM_AE_LVAL=4, /* lifetime value */
 225         XFRM_AE_ETHR=8, /* expiry timer threshold */
 226         XFRM_AE_CR=16, /* Event cause is replay update */
 227         XFRM_AE_CE=32, /* Event cause is timer expiry */
 228         XFRM_AE_CU=64, /* Event cause is policy update */
 229         __XFRM_AE_MAX
 230
 231 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1)
 232 };
 233
 234 struct xfrm_userpolicy_type {
 235         __u8            type;
 236         __u16           reserved1;
 237         __u8            reserved2;
 238 };
 239
 240 /* Netlink message attributes.  */
 241 enum xfrm_attr_type_t {
 242         XFRMA_UNSPEC,
 243         XFRMA_ALG_AUTH,         /* struct xfrm_algo */
 244         XFRMA_ALG_CRYPT,        /* struct xfrm_algo */
 245         XFRMA_ALG_COMP,         /* struct xfrm_algo */
 246         XFRMA_ENCAP,            /* struct xfrm_algo + struct xfrm_encap_tmpl */
 247         XFRMA_TMPL,             /* 1 or more struct xfrm_user_tmpl */
 248         XFRMA_SA,
 249         XFRMA_POLICY,
 250         XFRMA_SEC_CTX,          /* struct xfrm_sec_ctx */
 251         XFRMA_LTIME_VAL,
 252         XFRMA_REPLAY_VAL,
 253         XFRMA_REPLAY_THRESH,
 254         XFRMA_ETIMER_THRESH,
 255         XFRMA_SRCADDR,          /* xfrm_address_t */
 256         XFRMA_COADDR,           /* xfrm_address_t */
 257         XFRMA_LASTUSED,
 258         XFRMA_POLICY_TYPE,      /* struct xfrm_userpolicy_type */
 259         __XFRMA_MAX
 260
 261 #define XFRMA_MAX (__XFRMA_MAX - 1)
 262 };
 263
 264 struct xfrm_usersa_info {
 265         struct xfrm_selector            sel;
 266         struct xfrm_id                  id;
 267         xfrm_address_t                  saddr;
 268         struct xfrm_lifetime_cfg        lft;
 269         struct xfrm_lifetime_cur        curlft;
 270         struct xfrm_stats               stats;
 271         __u32                           seq;
 272         __u32                           reqid;
 273         __u16                           family;
 274         __u8                            mode;           /* XFRM_MODE_xxx */
 275         __u8                            replay_window;
 276         __u8                            flags;
 277 #define XFRM_STATE_NOECN        1
 278 #define XFRM_STATE_DECAP_DSCP   2
 279 #define XFRM_STATE_NOPMTUDISC   4
 280 #define XFRM_STATE_WILDRECV     8
 281 };
 282
 283 struct xfrm_usersa_id {
 284         xfrm_address_t                  daddr;
 285         __be32                          spi;
 286         __u16                           family;
 287         __u8                            proto;
 288 };
 289
 290 struct xfrm_aevent_id {
 291         struct xfrm_usersa_id           sa_id;
 292         __u32                           flags;
 293 };
 294
 295 struct xfrm_userspi_info {
 296         struct xfrm_usersa_info         info;
 297         __u32                           min;
 298         __u32                           max;
 299 };
 300
 301 struct xfrm_userpolicy_info {
 302         struct xfrm_selector            sel;
 303         struct xfrm_lifetime_cfg        lft;
 304         struct xfrm_lifetime_cur        curlft;
 305         __u32                           priority;
 306         __u32                           index;
 307         __u8                            dir;
 308         __u8                            action;
 309 #define XFRM_POLICY_ALLOW       0
 310 #define XFRM_POLICY_BLOCK       1
 311         __u8                            flags;
 312 #define XFRM_POLICY_LOCALOK     1       /* Allow user to override global policy */
 313         __u8                            share;
 314 };
 315
 316 struct xfrm_userpolicy_id {
 317         struct xfrm_selector            sel;
 318         __u32                           index;
 319         __u8                            dir;
 320 };
 321
 322 struct xfrm_user_acquire {
 323         struct xfrm_id                  id;
 324         xfrm_address_t                  saddr;
 325         struct xfrm_selector            sel;
 326         struct xfrm_userpolicy_info     policy;
 327         __u32                           aalgos;
 328         __u32                           ealgos;
 329         __u32                           calgos;
 330         __u32                           seq;
 331 };
 332
 333 struct xfrm_user_expire {
 334         struct xfrm_usersa_info         state;
 335         __u8                            hard;
 336 };
 337
 338 struct xfrm_user_polexpire {
 339         struct xfrm_userpolicy_info     pol;
 340         __u8                            hard;
 341 };
 342
 343 struct xfrm_usersa_flush {
 344         __u8                            proto;
 345 };
 346
 347 struct xfrm_user_report {
 348         __u8                            proto;
 349         struct xfrm_selector            sel;
 350 };
 351
 352 #ifndef __KERNEL__
 353 /* backwards compatibility for userspace */
 354 #define XFRMGRP_ACQUIRE         1
 355 #define XFRMGRP_EXPIRE          2
 356 #define XFRMGRP_SA              4
 357 #define XFRMGRP_POLICY          8
 358 #define XFRMGRP_REPORT          0x10
 359 #endif
 360
 361 enum xfrm_nlgroups {
 362         XFRMNLGRP_NONE,
 363 #define XFRMNLGRP_NONE          XFRMNLGRP_NONE
 364         XFRMNLGRP_ACQUIRE,
 365 #define XFRMNLGRP_ACQUIRE       XFRMNLGRP_ACQUIRE
 366         XFRMNLGRP_EXPIRE,
 367 #define XFRMNLGRP_EXPIRE        XFRMNLGRP_EXPIRE
 368         XFRMNLGRP_SA,
 369 #define XFRMNLGRP_SA            XFRMNLGRP_SA
 370         XFRMNLGRP_POLICY,
 371 #define XFRMNLGRP_POLICY        XFRMNLGRP_POLICY
 372         XFRMNLGRP_AEVENTS,
 373 #define XFRMNLGRP_AEVENTS       XFRMNLGRP_AEVENTS
 374         XFRMNLGRP_REPORT,
 375 #define XFRMNLGRP_REPORT        XFRMNLGRP_REPORT
 376         __XFRMNLGRP_MAX
 377 };
 378 #define XFRMNLGRP_MAX   (__XFRMNLGRP_MAX - 1)
 379
 380 #endif /* _LINUX_XFRM_H */