xfrm.h 8.1 KB

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  1. #ifndef _LINUX_XFRM_H
  2. #define _LINUX_XFRM_H
  3. #include <linux/types.h>
  4. /* All of the structures in this file may not change size as they are
  5. * passed into the kernel from userspace via netlink sockets.
  6. */
  7. /* Structure to encapsulate addresses. I do not want to use
  8. * "standard" structure. My apologies.
  9. */
  10. typedef union
  11. {
  12. __be32 a4;
  13. __be32 a6[4];
  14. } xfrm_address_t;
  15. /* Ident of a specific xfrm_state. It is used on input to lookup
  16. * the state by (spi,daddr,ah/esp) or to store information about
  17. * spi, protocol and tunnel address on output.
  18. */
  19. struct xfrm_id
  20. {
  21. xfrm_address_t daddr;
  22. __be32 spi;
  23. __u8 proto;
  24. };
  25. struct xfrm_sec_ctx {
  26. __u8 ctx_doi;
  27. __u8 ctx_alg;
  28. __u16 ctx_len;
  29. __u32 ctx_sid;
  30. char ctx_str[0];
  31. };
  32. /* Security Context Domains of Interpretation */
  33. #define XFRM_SC_DOI_RESERVED 0
  34. #define XFRM_SC_DOI_LSM 1
  35. /* Security Context Algorithms */
  36. #define XFRM_SC_ALG_RESERVED 0
  37. #define XFRM_SC_ALG_SELINUX 1
  38. /* Selector, used as selector both on policy rules (SPD) and SAs. */
  39. struct xfrm_selector
  40. {
  41. xfrm_address_t daddr;
  42. xfrm_address_t saddr;
  43. __be16 dport;
  44. __be16 dport_mask;
  45. __be16 sport;
  46. __be16 sport_mask;
  47. __u16 family;
  48. __u8 prefixlen_d;
  49. __u8 prefixlen_s;
  50. __u8 proto;
  51. int ifindex;
  52. uid_t user;
  53. };
  54. #define XFRM_INF (~(__u64)0)
  55. struct xfrm_lifetime_cfg
  56. {
  57. __u64 soft_byte_limit;
  58. __u64 hard_byte_limit;
  59. __u64 soft_packet_limit;
  60. __u64 hard_packet_limit;
  61. __u64 soft_add_expires_seconds;
  62. __u64 hard_add_expires_seconds;
  63. __u64 soft_use_expires_seconds;
  64. __u64 hard_use_expires_seconds;
  65. };
  66. struct xfrm_lifetime_cur
  67. {
  68. __u64 bytes;
  69. __u64 packets;
  70. __u64 add_time;
  71. __u64 use_time;
  72. };
  73. struct xfrm_replay_state
  74. {
  75. __u32 oseq;
  76. __u32 seq;
  77. __u32 bitmap;
  78. };
  79. struct xfrm_algo {
  80. char alg_name[64];
  81. int alg_key_len; /* in bits */
  82. char alg_key[0];
  83. };
  84. struct xfrm_stats {
  85. __u32 replay_window;
  86. __u32 replay;
  87. __u32 integrity_failed;
  88. };
  89. enum
  90. {
  91. XFRM_POLICY_TYPE_MAIN = 0,
  92. XFRM_POLICY_TYPE_SUB = 1,
  93. XFRM_POLICY_TYPE_MAX = 2
  94. };
  95. enum
  96. {
  97. XFRM_POLICY_IN = 0,
  98. XFRM_POLICY_OUT = 1,
  99. XFRM_POLICY_FWD = 2,
  100. XFRM_POLICY_MAX = 3
  101. };
  102. enum
  103. {
  104. XFRM_SHARE_ANY, /* No limitations */
  105. XFRM_SHARE_SESSION, /* For this session only */
  106. XFRM_SHARE_USER, /* For this user only */
  107. XFRM_SHARE_UNIQUE /* Use once */
  108. };
  109. #define XFRM_MODE_TRANSPORT 0
  110. #define XFRM_MODE_TUNNEL 1
  111. #define XFRM_MODE_ROUTEOPTIMIZATION 2
  112. #define XFRM_MODE_IN_TRIGGER 3
  113. #define XFRM_MODE_BEET 4
  114. #define XFRM_MODE_MAX 5
  115. /* Netlink configuration messages. */
  116. enum {
  117. XFRM_MSG_BASE = 0x10,
  118. XFRM_MSG_NEWSA = 0x10,
  119. #define XFRM_MSG_NEWSA XFRM_MSG_NEWSA
  120. XFRM_MSG_DELSA,
  121. #define XFRM_MSG_DELSA XFRM_MSG_DELSA
  122. XFRM_MSG_GETSA,
  123. #define XFRM_MSG_GETSA XFRM_MSG_GETSA
  124. XFRM_MSG_NEWPOLICY,
  125. #define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY
  126. XFRM_MSG_DELPOLICY,
  127. #define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY
  128. XFRM_MSG_GETPOLICY,
  129. #define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY
  130. XFRM_MSG_ALLOCSPI,
  131. #define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI
  132. XFRM_MSG_ACQUIRE,
  133. #define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE
  134. XFRM_MSG_EXPIRE,
  135. #define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE
  136. XFRM_MSG_UPDPOLICY,
  137. #define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY
  138. XFRM_MSG_UPDSA,
  139. #define XFRM_MSG_UPDSA XFRM_MSG_UPDSA
  140. XFRM_MSG_POLEXPIRE,
  141. #define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE
  142. XFRM_MSG_FLUSHSA,
  143. #define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA
  144. XFRM_MSG_FLUSHPOLICY,
  145. #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
  146. XFRM_MSG_NEWAE,
  147. #define XFRM_MSG_NEWAE XFRM_MSG_NEWAE
  148. XFRM_MSG_GETAE,
  149. #define XFRM_MSG_GETAE XFRM_MSG_GETAE
  150. XFRM_MSG_REPORT,
  151. #define XFRM_MSG_REPORT XFRM_MSG_REPORT
  152. XFRM_MSG_MIGRATE,
  153. #define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE
  154. __XFRM_MSG_MAX
  155. };
  156. #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
  157. #define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
  158. /*
  159. * Generic LSM security context for comunicating to user space
  160. * NOTE: Same format as sadb_x_sec_ctx
  161. */
  162. struct xfrm_user_sec_ctx {
  163. __u16 len;
  164. __u16 exttype;
  165. __u8 ctx_alg; /* LSMs: e.g., selinux == 1 */
  166. __u8 ctx_doi;
  167. __u16 ctx_len;
  168. };
  169. struct xfrm_user_tmpl {
  170. struct xfrm_id id;
  171. __u16 family;
  172. xfrm_address_t saddr;
  173. __u32 reqid;
  174. __u8 mode;
  175. __u8 share;
  176. __u8 optional;
  177. __u32 aalgos;
  178. __u32 ealgos;
  179. __u32 calgos;
  180. };
  181. struct xfrm_encap_tmpl {
  182. __u16 encap_type;
  183. __be16 encap_sport;
  184. __be16 encap_dport;
  185. xfrm_address_t encap_oa;
  186. };
  187. /* AEVENT flags */
  188. enum xfrm_ae_ftype_t {
  189. XFRM_AE_UNSPEC,
  190. XFRM_AE_RTHR=1, /* replay threshold*/
  191. XFRM_AE_RVAL=2, /* replay value */
  192. XFRM_AE_LVAL=4, /* lifetime value */
  193. XFRM_AE_ETHR=8, /* expiry timer threshold */
  194. XFRM_AE_CR=16, /* Event cause is replay update */
  195. XFRM_AE_CE=32, /* Event cause is timer expiry */
  196. XFRM_AE_CU=64, /* Event cause is policy update */
  197. __XFRM_AE_MAX
  198. #define XFRM_AE_MAX (__XFRM_AE_MAX - 1)
  199. };
  200. struct xfrm_userpolicy_type {
  201. __u8 type;
  202. __u16 reserved1;
  203. __u8 reserved2;
  204. };
  205. /* Netlink message attributes. */
  206. enum xfrm_attr_type_t {
  207. XFRMA_UNSPEC,
  208. XFRMA_ALG_AUTH, /* struct xfrm_algo */
  209. XFRMA_ALG_CRYPT, /* struct xfrm_algo */
  210. XFRMA_ALG_COMP, /* struct xfrm_algo */
  211. XFRMA_ENCAP, /* struct xfrm_algo + struct xfrm_encap_tmpl */
  212. XFRMA_TMPL, /* 1 or more struct xfrm_user_tmpl */
  213. XFRMA_SA,
  214. XFRMA_POLICY,
  215. XFRMA_SEC_CTX, /* struct xfrm_sec_ctx */
  216. XFRMA_LTIME_VAL,
  217. XFRMA_REPLAY_VAL,
  218. XFRMA_REPLAY_THRESH,
  219. XFRMA_ETIMER_THRESH,
  220. XFRMA_SRCADDR, /* xfrm_address_t */
  221. XFRMA_COADDR, /* xfrm_address_t */
  222. XFRMA_LASTUSED,
  223. XFRMA_POLICY_TYPE, /* struct xfrm_userpolicy_type */
  224. XFRMA_MIGRATE,
  225. __XFRMA_MAX
  226. #define XFRMA_MAX (__XFRMA_MAX - 1)
  227. };
  228. struct xfrm_usersa_info {
  229. struct xfrm_selector sel;
  230. struct xfrm_id id;
  231. xfrm_address_t saddr;
  232. struct xfrm_lifetime_cfg lft;
  233. struct xfrm_lifetime_cur curlft;
  234. struct xfrm_stats stats;
  235. __u32 seq;
  236. __u32 reqid;
  237. __u16 family;
  238. __u8 mode; /* XFRM_MODE_xxx */
  239. __u8 replay_window;
  240. __u8 flags;
  241. #define XFRM_STATE_NOECN 1
  242. #define XFRM_STATE_DECAP_DSCP 2
  243. #define XFRM_STATE_NOPMTUDISC 4
  244. #define XFRM_STATE_WILDRECV 8
  245. };
  246. struct xfrm_usersa_id {
  247. xfrm_address_t daddr;
  248. __be32 spi;
  249. __u16 family;
  250. __u8 proto;
  251. };
  252. struct xfrm_aevent_id {
  253. struct xfrm_usersa_id sa_id;
  254. xfrm_address_t saddr;
  255. __u32 flags;
  256. __u32 reqid;
  257. };
  258. struct xfrm_userspi_info {
  259. struct xfrm_usersa_info info;
  260. __u32 min;
  261. __u32 max;
  262. };
  263. struct xfrm_userpolicy_info {
  264. struct xfrm_selector sel;
  265. struct xfrm_lifetime_cfg lft;
  266. struct xfrm_lifetime_cur curlft;
  267. __u32 priority;
  268. __u32 index;
  269. __u8 dir;
  270. __u8 action;
  271. #define XFRM_POLICY_ALLOW 0
  272. #define XFRM_POLICY_BLOCK 1
  273. __u8 flags;
  274. #define XFRM_POLICY_LOCALOK 1 /* Allow user to override global policy */
  275. __u8 share;
  276. };
  277. struct xfrm_userpolicy_id {
  278. struct xfrm_selector sel;
  279. __u32 index;
  280. __u8 dir;
  281. };
  282. struct xfrm_user_acquire {
  283. struct xfrm_id id;
  284. xfrm_address_t saddr;
  285. struct xfrm_selector sel;
  286. struct xfrm_userpolicy_info policy;
  287. __u32 aalgos;
  288. __u32 ealgos;
  289. __u32 calgos;
  290. __u32 seq;
  291. };
  292. struct xfrm_user_expire {
  293. struct xfrm_usersa_info state;
  294. __u8 hard;
  295. };
  296. struct xfrm_user_polexpire {
  297. struct xfrm_userpolicy_info pol;
  298. __u8 hard;
  299. };
  300. struct xfrm_usersa_flush {
  301. __u8 proto;
  302. };
  303. struct xfrm_user_report {
  304. __u8 proto;
  305. struct xfrm_selector sel;
  306. };
  307. struct xfrm_user_migrate {
  308. xfrm_address_t old_daddr;
  309. xfrm_address_t old_saddr;
  310. xfrm_address_t new_daddr;
  311. xfrm_address_t new_saddr;
  312. __u8 proto;
  313. __u8 mode;
  314. __u16 reserved;
  315. __u32 reqid;
  316. __u16 old_family;
  317. __u16 new_family;
  318. };
  319. #ifndef __KERNEL__
  320. /* backwards compatibility for userspace */
  321. #define XFRMGRP_ACQUIRE 1
  322. #define XFRMGRP_EXPIRE 2
  323. #define XFRMGRP_SA 4
  324. #define XFRMGRP_POLICY 8
  325. #define XFRMGRP_REPORT 0x20
  326. #endif
  327. enum xfrm_nlgroups {
  328. XFRMNLGRP_NONE,
  329. #define XFRMNLGRP_NONE XFRMNLGRP_NONE
  330. XFRMNLGRP_ACQUIRE,
  331. #define XFRMNLGRP_ACQUIRE XFRMNLGRP_ACQUIRE
  332. XFRMNLGRP_EXPIRE,
  333. #define XFRMNLGRP_EXPIRE XFRMNLGRP_EXPIRE
  334. XFRMNLGRP_SA,
  335. #define XFRMNLGRP_SA XFRMNLGRP_SA
  336. XFRMNLGRP_POLICY,
  337. #define XFRMNLGRP_POLICY XFRMNLGRP_POLICY
  338. XFRMNLGRP_AEVENTS,
  339. #define XFRMNLGRP_AEVENTS XFRMNLGRP_AEVENTS
  340. XFRMNLGRP_REPORT,
  341. #define XFRMNLGRP_REPORT XFRMNLGRP_REPORT
  342. XFRMNLGRP_MIGRATE,
  343. #define XFRMNLGRP_MIGRATE XFRMNLGRP_MIGRATE
  344. __XFRMNLGRP_MAX
  345. };
  346. #define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1)
  347. #endif /* _LINUX_XFRM_H */