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 /* Netlink configuration messages.  */
 122 enum {
 123         XFRM_MSG_BASE = 0x10,
 124
 125         XFRM_MSG_NEWSA = 0x10,
 126 #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA
 127         XFRM_MSG_DELSA,
 128 #define XFRM_MSG_DELSA XFRM_MSG_DELSA
 129         XFRM_MSG_GETSA,
 130 #define XFRM_MSG_GETSA XFRM_MSG_GETSA
 131
 132         XFRM_MSG_NEWPOLICY,
 133 #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY
 134         XFRM_MSG_DELPOLICY,
 135 #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY
 136         XFRM_MSG_GETPOLICY,
 137 #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY
 138
 139         XFRM_MSG_ALLOCSPI,
 140 #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI
 141         XFRM_MSG_ACQUIRE,
 142 #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE
 143         XFRM_MSG_EXPIRE,
 144 #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE
 145
 146         XFRM_MSG_UPDPOLICY,
 147 #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY
 148         XFRM_MSG_UPDSA,
 149 #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA
 150
 151         XFRM_MSG_POLEXPIRE,
 152 #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE
 153
 154         XFRM_MSG_FLUSHSA,
 155 #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA
 156         XFRM_MSG_FLUSHPOLICY,
 157 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
 158
 159         XFRM_MSG_NEWAE,
 160 #define XFRM_MSG_NEWAE XFRM_MSG_NEWAE
 161         XFRM_MSG_GETAE,
 162 #define XFRM_MSG_GETAE XFRM_MSG_GETAE
 163         __XFRM_MSG_MAX
 164 };
 165 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
 166
 167 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
 168
 169 /*
 170  * Generic LSM security context for comunicating to user space
 171  * NOTE: Same format as sadb_x_sec_ctx
 172  */
 173 struct xfrm_user_sec_ctx {
 174         __u16                   len;
 175         __u16                   exttype;
 176         __u8                    ctx_alg;  /* LSMs: e.g., selinux == 1 */
 177         __u8                    ctx_doi;
 178         __u16                   ctx_len;
 179 };
 180
 181 struct xfrm_user_tmpl {
 182         struct xfrm_id          id;
 183         __u16                   family;
 184         xfrm_address_t          saddr;
 185         __u32                   reqid;
 186         __u8                    mode;
 187         __u8                    share;
 188         __u8                    optional;
 189         __u32                   aalgos;
 190         __u32                   ealgos;
 191         __u32                   calgos;
 192 };
 193
 194 struct xfrm_encap_tmpl {
 195         __u16           encap_type;
 196         __u16           encap_sport;
 197         __u16           encap_dport;
 198         xfrm_address_t  encap_oa;
 199 };
 200
 201 /* AEVENT flags  */
 202 enum xfrm_ae_ftype_t {
 203         XFRM_AE_UNSPEC,
 204         XFRM_AE_RTHR=1, /* replay threshold*/
 205         XFRM_AE_RVAL=2, /* replay value */
 206         XFRM_AE_LVAL=4, /* lifetime value */
 207         XFRM_AE_ETHR=8, /* expiry timer threshold */
 208         XFRM_AE_CR=16, /* Event cause is replay update */
 209         XFRM_AE_CE=32, /* Event cause is timer expiry */
 210         XFRM_AE_CU=64, /* Event cause is policy update */
 211         __XFRM_AE_MAX
 212
 213 #define XFRM_AE_MAX (__XFRM_AE_MAX - 1)
 214 };
 215
 216 /* Netlink message attributes.  */
 217 enum xfrm_attr_type_t {
 218         XFRMA_UNSPEC,
 219         XFRMA_ALG_AUTH,         /* struct xfrm_algo */
 220         XFRMA_ALG_CRYPT,        /* struct xfrm_algo */
 221         XFRMA_ALG_COMP,         /* struct xfrm_algo */
 222         XFRMA_ENCAP,            /* struct xfrm_algo + struct xfrm_encap_tmpl */
 223         XFRMA_TMPL,             /* 1 or more struct xfrm_user_tmpl */
 224         XFRMA_SA,
 225         XFRMA_POLICY,
 226         XFRMA_SEC_CTX,          /* struct xfrm_sec_ctx */
 227         XFRMA_LTIME_VAL,
 228         XFRMA_REPLAY_VAL,
 229         XFRMA_REPLAY_THRESH,
 230         XFRMA_ETIMER_THRESH,
 231         __XFRMA_MAX
 232
 233 #define XFRMA_MAX (__XFRMA_MAX - 1)
 234 };
 235
 236 struct xfrm_usersa_info {
 237         struct xfrm_selector            sel;
 238         struct xfrm_id                  id;
 239         xfrm_address_t                  saddr;
 240         struct xfrm_lifetime_cfg        lft;
 241         struct xfrm_lifetime_cur        curlft;
 242         struct xfrm_stats               stats;
 243         __u32                           seq;
 244         __u32                           reqid;
 245         __u16                           family;
 246         __u8                            mode; /* 0=transport,1=tunnel */
 247         __u8                            replay_window;
 248         __u8                            flags;
 249 #define XFRM_STATE_NOECN        1
 250 #define XFRM_STATE_DECAP_DSCP   2
 251 #define XFRM_STATE_NOPMTUDISC   4
 252 };
 253
 254 struct xfrm_usersa_id {
 255         xfrm_address_t                  daddr;
 256         __u32                           spi;
 257         __u16                           family;
 258         __u8                            proto;
 259 };
 260
 261 struct xfrm_aevent_id {
 262         struct xfrm_usersa_id           sa_id;
 263         __u32                           flags;
 264 };
 265
 266 struct xfrm_userspi_info {
 267         struct xfrm_usersa_info         info;
 268         __u32                           min;
 269         __u32                           max;
 270 };
 271
 272 struct xfrm_userpolicy_info {
 273         struct xfrm_selector            sel;
 274         struct xfrm_lifetime_cfg        lft;
 275         struct xfrm_lifetime_cur        curlft;
 276         __u32                           priority;
 277         __u32                           index;
 278         __u8                            dir;
 279         __u8                            action;
 280 #define XFRM_POLICY_ALLOW       0
 281 #define XFRM_POLICY_BLOCK       1
 282         __u8                            flags;
 283 #define XFRM_POLICY_LOCALOK     1       /* Allow user to override global policy */
 284         __u8                            share;
 285 };
 286
 287 struct xfrm_userpolicy_id {
 288         struct xfrm_selector            sel;
 289         __u32                           index;
 290         __u8                            dir;
 291 };
 292
 293 struct xfrm_user_acquire {
 294         struct xfrm_id                  id;
 295         xfrm_address_t                  saddr;
 296         struct xfrm_selector            sel;
 297         struct xfrm_userpolicy_info     policy;
 298         __u32                           aalgos;
 299         __u32                           ealgos;
 300         __u32                           calgos;
 301         __u32                           seq;
 302 };
 303
 304 struct xfrm_user_expire {
 305         struct xfrm_usersa_info         state;
 306         __u8                            hard;
 307 };
 308
 309 struct xfrm_user_polexpire {
 310         struct xfrm_userpolicy_info     pol;
 311         __u8                            hard;
 312 };
 313
 314 struct xfrm_usersa_flush {
 315         __u8                            proto;
 316 };
 317
 318 #ifndef __KERNEL__
 319 /* backwards compatibility for userspace */
 320 #define XFRMGRP_ACQUIRE         1
 321 #define XFRMGRP_EXPIRE          2
 322 #define XFRMGRP_SA              4
 323 #define XFRMGRP_POLICY          8
 324 #endif
 325
 326 enum xfrm_nlgroups {
 327         XFRMNLGRP_NONE,
 328 #define XFRMNLGRP_NONE          XFRMNLGRP_NONE
 329         XFRMNLGRP_ACQUIRE,
 330 #define XFRMNLGRP_ACQUIRE       XFRMNLGRP_ACQUIRE
 331         XFRMNLGRP_EXPIRE,
 332 #define XFRMNLGRP_EXPIRE        XFRMNLGRP_EXPIRE
 333         XFRMNLGRP_SA,
 334 #define XFRMNLGRP_SA            XFRMNLGRP_SA
 335         XFRMNLGRP_POLICY,
 336 #define XFRMNLGRP_POLICY        XFRMNLGRP_POLICY
 337         XFRMNLGRP_AEVENTS,
 338 #define XFRMNLGRP_AEVENTS       XFRMNLGRP_AEVENTS
 339         __XFRMNLGRP_MAX
 340 };
 341 #define XFRMNLGRP_MAX   (__XFRMNLGRP_MAX - 1)
 342
 343 #endif /* _LINUX_XFRM_H */