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 /* Selector, used as selector both on policy rules (SPD) and SAs. */
  31
  32 struct xfrm_selector
  33 {
  34         xfrm_address_t  daddr;
  35         xfrm_address_t  saddr;
  36         __u16   dport;
  37         __u16   dport_mask;
  38         __u16   sport;
  39         __u16   sport_mask;
  40         __u16   family;
  41         __u8    prefixlen_d;
  42         __u8    prefixlen_s;
  43         __u8    proto;
  44         int     ifindex;
  45         uid_t   user;
  46 };
  47
  48 #define XFRM_INF (~(__u64)0)
  49
  50 struct xfrm_lifetime_cfg
  51 {
  52         __u64   soft_byte_limit;
  53         __u64   hard_byte_limit;
  54         __u64   soft_packet_limit;
  55         __u64   hard_packet_limit;
  56         __u64   soft_add_expires_seconds;
  57         __u64   hard_add_expires_seconds;
  58         __u64   soft_use_expires_seconds;
  59         __u64   hard_use_expires_seconds;
  60 };
  61
  62 struct xfrm_lifetime_cur
  63 {
  64         __u64   bytes;
  65         __u64   packets;
  66         __u64   add_time;
  67         __u64   use_time;
  68 };
  69
  70 struct xfrm_replay_state
  71 {
  72         __u32   oseq;
  73         __u32   seq;
  74         __u32   bitmap;
  75 };
  76
  77 struct xfrm_algo {
  78         char    alg_name[64];
  79         int     alg_key_len;    /* in bits */
  80         char    alg_key[0];
  81 };
  82
  83 struct xfrm_stats {
  84         __u32   replay_window;
  85         __u32   replay;
  86         __u32   integrity_failed;
  87 };
  88
  89 enum
  90 {
  91         XFRM_POLICY_IN  = 0,
  92         XFRM_POLICY_OUT = 1,
  93         XFRM_POLICY_FWD = 2,
  94         XFRM_POLICY_MAX = 3
  95 };
  96
  97 enum
  98 {
  99         XFRM_SHARE_ANY,         /* No limitations */
 100         XFRM_SHARE_SESSION,     /* For this session only */
 101         XFRM_SHARE_USER,        /* For this user only */
 102         XFRM_SHARE_UNIQUE       /* Use once */
 103 };
 104
 105 /* Netlink configuration messages.  */
 106 enum {
 107         XFRM_MSG_BASE = 0x10,
 108
 109         XFRM_MSG_NEWSA = 0x10,
 110 #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA
 111         XFRM_MSG_DELSA,
 112 #define XFRM_MSG_DELSA XFRM_MSG_DELSA
 113         XFRM_MSG_GETSA,
 114 #define XFRM_MSG_GETSA XFRM_MSG_GETSA
 115
 116         XFRM_MSG_NEWPOLICY,
 117 #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY
 118         XFRM_MSG_DELPOLICY,
 119 #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY
 120         XFRM_MSG_GETPOLICY,
 121 #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY
 122
 123         XFRM_MSG_ALLOCSPI,
 124 #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI
 125         XFRM_MSG_ACQUIRE,
 126 #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE
 127         XFRM_MSG_EXPIRE,
 128 #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE
 129
 130         XFRM_MSG_UPDPOLICY,
 131 #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY
 132         XFRM_MSG_UPDSA,
 133 #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA
 134
 135         XFRM_MSG_POLEXPIRE,
 136 #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE
 137
 138         XFRM_MSG_FLUSHSA,
 139 #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA
 140         XFRM_MSG_FLUSHPOLICY,
 141 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
 142
 143         __XFRM_MSG_MAX
 144 };
 145 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
 146
 147 #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
 148
 149 struct xfrm_user_tmpl {
 150         struct xfrm_id          id;
 151         __u16                   family;
 152         xfrm_address_t          saddr;
 153         __u32                   reqid;
 154         __u8                    mode;
 155         __u8                    share;
 156         __u8                    optional;
 157         __u32                   aalgos;
 158         __u32                   ealgos;
 159         __u32                   calgos;
 160 };
 161
 162 struct xfrm_encap_tmpl {
 163         __u16           encap_type;
 164         __u16           encap_sport;
 165         __u16           encap_dport;
 166         xfrm_address_t  encap_oa;
 167 };
 168
 169 /* Netlink message attributes.  */
 170 enum xfrm_attr_type_t {
 171         XFRMA_UNSPEC,
 172         XFRMA_ALG_AUTH,         /* struct xfrm_algo */
 173         XFRMA_ALG_CRYPT,        /* struct xfrm_algo */
 174         XFRMA_ALG_COMP,         /* struct xfrm_algo */
 175         XFRMA_ENCAP,            /* struct xfrm_algo + struct xfrm_encap_tmpl */
 176         XFRMA_TMPL,             /* 1 or more struct xfrm_user_tmpl */
 177         XFRMA_SA,
 178         XFRMA_POLICY,
 179         __XFRMA_MAX
 180
 181 #define XFRMA_MAX (__XFRMA_MAX - 1)
 182 };
 183
 184 struct xfrm_usersa_info {
 185         struct xfrm_selector            sel;
 186         struct xfrm_id                  id;
 187         xfrm_address_t                  saddr;
 188         struct xfrm_lifetime_cfg        lft;
 189         struct xfrm_lifetime_cur        curlft;
 190         struct xfrm_stats               stats;
 191         __u32                           seq;
 192         __u32                           reqid;
 193         __u16                           family;
 194         __u8                            mode; /* 0=transport,1=tunnel */
 195         __u8                            replay_window;
 196         __u8                            flags;
 197 #define XFRM_STATE_NOECN        1
 198 #define XFRM_STATE_DECAP_DSCP   2
 199 };
 200
 201 struct xfrm_usersa_id {
 202         xfrm_address_t                  daddr;
 203         __u32                           spi;
 204         __u16                           family;
 205         __u8                            proto;
 206 };
 207
 208 struct xfrm_userspi_info {
 209         struct xfrm_usersa_info         info;
 210         __u32                           min;
 211         __u32                           max;
 212 };
 213
 214 struct xfrm_userpolicy_info {
 215         struct xfrm_selector            sel;
 216         struct xfrm_lifetime_cfg        lft;
 217         struct xfrm_lifetime_cur        curlft;
 218         __u32                           priority;
 219         __u32                           index;
 220         __u8                            dir;
 221         __u8                            action;
 222 #define XFRM_POLICY_ALLOW       0
 223 #define XFRM_POLICY_BLOCK       1
 224         __u8                            flags;
 225 #define XFRM_POLICY_LOCALOK     1       /* Allow user to override global policy */
 226         __u8                            share;
 227 };
 228
 229 struct xfrm_userpolicy_id {
 230         struct xfrm_selector            sel;
 231         __u32                           index;
 232         __u8                            dir;
 233 };
 234
 235 struct xfrm_user_acquire {
 236         struct xfrm_id                  id;
 237         xfrm_address_t                  saddr;
 238         struct xfrm_selector            sel;
 239         struct xfrm_userpolicy_info     policy;
 240         __u32                           aalgos;
 241         __u32                           ealgos;
 242         __u32                           calgos;
 243         __u32                           seq;
 244 };
 245
 246 struct xfrm_user_expire {
 247         struct xfrm_usersa_info         state;
 248         __u8                            hard;
 249 };
 250
 251 struct xfrm_user_polexpire {
 252         struct xfrm_userpolicy_info     pol;
 253         __u8                            hard;
 254 };
 255
 256 struct xfrm_usersa_flush {
 257         __u8                            proto;
 258 };
 259
 260 #define XFRMGRP_ACQUIRE         1
 261 #define XFRMGRP_EXPIRE          2
 262 #define XFRMGRP_SA              4
 263 #define XFRMGRP_POLICY          8
 264
 265 #endif /* _LINUX_XFRM_H */