xfrm.h revision efc0ea56c83f83698ca33e92afc63d5260710efa 
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 */
13typedef 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 */
23struct xfrm_id
24{
25	xfrm_address_t	daddr;
26	__be32		spi;
27	__u8		proto;
28};
29
30struct 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
48struct 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
66struct 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
78struct xfrm_lifetime_cur
79{
80	__u64	bytes;
81	__u64	packets;
82	__u64	add_time;
83	__u64	use_time;
84};
85
86struct xfrm_replay_state
87{
88	__u32	oseq;
89	__u32	seq;
90	__u32	bitmap;
91};
92
93struct xfrm_algo {
94	char		alg_name[64];
95	unsigned int	alg_key_len;    /* in bits */
96	char		alg_key[0];
97};
98
99struct xfrm_algo_aead {
100	char	alg_name[64];
101	int	alg_key_len;	/* in bits */
102	int	alg_icv_len;	/* in bits */
103	char	alg_key[0];
104};
105
106struct xfrm_stats {
107	__u32	replay_window;
108	__u32	replay;
109	__u32	integrity_failed;
110};
111
112enum
113{
114	XFRM_POLICY_TYPE_MAIN	= 0,
115	XFRM_POLICY_TYPE_SUB	= 1,
116	XFRM_POLICY_TYPE_MAX	= 2
117};
118
119enum
120{
121	XFRM_POLICY_IN	= 0,
122	XFRM_POLICY_OUT	= 1,
123	XFRM_POLICY_FWD	= 2,
124	XFRM_POLICY_MASK = 3,
125	XFRM_POLICY_MAX	= 3
126};
127
128enum
129{
130	XFRM_SHARE_ANY,		/* No limitations */
131	XFRM_SHARE_SESSION,	/* For this session only */
132	XFRM_SHARE_USER,	/* For this user only */
133	XFRM_SHARE_UNIQUE	/* Use once */
134};
135
136#define XFRM_MODE_TRANSPORT 0
137#define XFRM_MODE_TUNNEL 1
138#define XFRM_MODE_ROUTEOPTIMIZATION 2
139#define XFRM_MODE_IN_TRIGGER 3
140#define XFRM_MODE_BEET 4
141#define XFRM_MODE_MAX 5
142
143/* Netlink configuration messages.  */
144enum {
145	XFRM_MSG_BASE = 0x10,
146
147	XFRM_MSG_NEWSA = 0x10,
148#define XFRM_MSG_NEWSA XFRM_MSG_NEWSA
149	XFRM_MSG_DELSA,
150#define XFRM_MSG_DELSA XFRM_MSG_DELSA
151	XFRM_MSG_GETSA,
152#define XFRM_MSG_GETSA XFRM_MSG_GETSA
153
154	XFRM_MSG_NEWPOLICY,
155#define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY
156	XFRM_MSG_DELPOLICY,
157#define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY
158	XFRM_MSG_GETPOLICY,
159#define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY
160
161	XFRM_MSG_ALLOCSPI,
162#define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI
163	XFRM_MSG_ACQUIRE,
164#define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE
165	XFRM_MSG_EXPIRE,
166#define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE
167
168	XFRM_MSG_UPDPOLICY,
169#define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY
170	XFRM_MSG_UPDSA,
171#define XFRM_MSG_UPDSA XFRM_MSG_UPDSA
172
173	XFRM_MSG_POLEXPIRE,
174#define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE
175
176	XFRM_MSG_FLUSHSA,
177#define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA
178	XFRM_MSG_FLUSHPOLICY,
179#define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
180
181	XFRM_MSG_NEWAE,
182#define XFRM_MSG_NEWAE XFRM_MSG_NEWAE
183	XFRM_MSG_GETAE,
184#define XFRM_MSG_GETAE XFRM_MSG_GETAE
185
186	XFRM_MSG_REPORT,
187#define XFRM_MSG_REPORT XFRM_MSG_REPORT
188
189	XFRM_MSG_MIGRATE,
190#define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE
191
192	XFRM_MSG_NEWSADINFO,
193#define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO
194	XFRM_MSG_GETSADINFO,
195#define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO
196
197	XFRM_MSG_NEWSPDINFO,
198#define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO
199	XFRM_MSG_GETSPDINFO,
200#define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO
201	__XFRM_MSG_MAX
202};
203#define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
204
205#define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
206
207/*
208 * Generic LSM security context for comunicating to user space
209 * NOTE: Same format as sadb_x_sec_ctx
210 */
211struct xfrm_user_sec_ctx {
212	__u16			len;
213	__u16			exttype;
214	__u8			ctx_alg;  /* LSMs: e.g., selinux == 1 */
215	__u8			ctx_doi;
216	__u16			ctx_len;
217};
218
219struct xfrm_user_tmpl {
220	struct xfrm_id		id;
221	__u16			family;
222	xfrm_address_t		saddr;
223	__u32			reqid;
224	__u8			mode;
225	__u8			share;
226	__u8			optional;
227	__u32			aalgos;
228	__u32			ealgos;
229	__u32			calgos;
230};
231
232struct xfrm_encap_tmpl {
233	__u16		encap_type;
234	__be16		encap_sport;
235	__be16		encap_dport;
236	xfrm_address_t	encap_oa;
237};
238
239/* AEVENT flags  */
240enum xfrm_ae_ftype_t {
241	XFRM_AE_UNSPEC,
242	XFRM_AE_RTHR=1,	/* replay threshold*/
243	XFRM_AE_RVAL=2, /* replay value */
244	XFRM_AE_LVAL=4, /* lifetime value */
245	XFRM_AE_ETHR=8, /* expiry timer threshold */
246	XFRM_AE_CR=16, /* Event cause is replay update */
247	XFRM_AE_CE=32, /* Event cause is timer expiry */
248	XFRM_AE_CU=64, /* Event cause is policy update */
249	__XFRM_AE_MAX
250
251#define XFRM_AE_MAX (__XFRM_AE_MAX - 1)
252};
253
254struct xfrm_userpolicy_type {
255	__u8		type;
256	__u16		reserved1;
257	__u8		reserved2;
258};
259
260/* Netlink message attributes.  */
261enum xfrm_attr_type_t {
262	XFRMA_UNSPEC,
263	XFRMA_ALG_AUTH,		/* struct xfrm_algo */
264	XFRMA_ALG_CRYPT,	/* struct xfrm_algo */
265	XFRMA_ALG_COMP,		/* struct xfrm_algo */
266	XFRMA_ENCAP,		/* struct xfrm_algo + struct xfrm_encap_tmpl */
267	XFRMA_TMPL,		/* 1 or more struct xfrm_user_tmpl */
268	XFRMA_SA,
269	XFRMA_POLICY,
270	XFRMA_SEC_CTX,		/* struct xfrm_sec_ctx */
271	XFRMA_LTIME_VAL,
272	XFRMA_REPLAY_VAL,
273	XFRMA_REPLAY_THRESH,
274	XFRMA_ETIMER_THRESH,
275	XFRMA_SRCADDR,		/* xfrm_address_t */
276	XFRMA_COADDR,		/* xfrm_address_t */
277	XFRMA_LASTUSED,
278	XFRMA_POLICY_TYPE,	/* struct xfrm_userpolicy_type */
279	XFRMA_MIGRATE,
280	XFRMA_ALG_AEAD,		/* struct xfrm_algo_aead */
281	__XFRMA_MAX
282
283#define XFRMA_MAX (__XFRMA_MAX - 1)
284};
285
286enum xfrm_sadattr_type_t {
287	XFRMA_SAD_UNSPEC,
288	XFRMA_SAD_CNT,
289	XFRMA_SAD_HINFO,
290	__XFRMA_SAD_MAX
291
292#define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1)
293};
294
295struct xfrmu_sadhinfo {
296	__u32 sadhcnt; /* current hash bkts */
297	__u32 sadhmcnt; /* max allowed hash bkts */
298};
299
300enum xfrm_spdattr_type_t {
301	XFRMA_SPD_UNSPEC,
302	XFRMA_SPD_INFO,
303	XFRMA_SPD_HINFO,
304	__XFRMA_SPD_MAX
305
306#define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1)
307};
308
309struct xfrmu_spdinfo {
310	__u32 incnt;
311	__u32 outcnt;
312	__u32 fwdcnt;
313	__u32 inscnt;
314	__u32 outscnt;
315	__u32 fwdscnt;
316};
317
318struct xfrmu_spdhinfo {
319	__u32 spdhcnt;
320	__u32 spdhmcnt;
321};
322
323struct xfrm_usersa_info {
324	struct xfrm_selector		sel;
325	struct xfrm_id			id;
326	xfrm_address_t			saddr;
327	struct xfrm_lifetime_cfg	lft;
328	struct xfrm_lifetime_cur	curlft;
329	struct xfrm_stats		stats;
330	__u32				seq;
331	__u32				reqid;
332	__u16				family;
333	__u8				mode;		/* XFRM_MODE_xxx */
334	__u8				replay_window;
335	__u8				flags;
336#define XFRM_STATE_NOECN	1
337#define XFRM_STATE_DECAP_DSCP	2
338#define XFRM_STATE_NOPMTUDISC	4
339#define XFRM_STATE_WILDRECV	8
340#define XFRM_STATE_ICMP		16
341};
342
343struct xfrm_usersa_id {
344	xfrm_address_t			daddr;
345	__be32				spi;
346	__u16				family;
347	__u8				proto;
348};
349
350struct xfrm_aevent_id {
351	struct xfrm_usersa_id		sa_id;
352	xfrm_address_t			saddr;
353	__u32				flags;
354	__u32				reqid;
355};
356
357struct xfrm_userspi_info {
358	struct xfrm_usersa_info		info;
359	__u32				min;
360	__u32				max;
361};
362
363struct xfrm_userpolicy_info {
364	struct xfrm_selector		sel;
365	struct xfrm_lifetime_cfg	lft;
366	struct xfrm_lifetime_cur	curlft;
367	__u32				priority;
368	__u32				index;
369	__u8				dir;
370	__u8				action;
371#define XFRM_POLICY_ALLOW	0
372#define XFRM_POLICY_BLOCK	1
373	__u8				flags;
374#define XFRM_POLICY_LOCALOK	1	/* Allow user to override global policy */
375	/* Automatically expand selector to include matching ICMP payloads. */
376#define XFRM_POLICY_ICMP	2
377	__u8				share;
378};
379
380struct xfrm_userpolicy_id {
381	struct xfrm_selector		sel;
382	__u32				index;
383	__u8				dir;
384};
385
386struct xfrm_user_acquire {
387	struct xfrm_id			id;
388	xfrm_address_t			saddr;
389	struct xfrm_selector		sel;
390	struct xfrm_userpolicy_info	policy;
391	__u32				aalgos;
392	__u32				ealgos;
393	__u32				calgos;
394	__u32				seq;
395};
396
397struct xfrm_user_expire {
398	struct xfrm_usersa_info		state;
399	__u8				hard;
400};
401
402struct xfrm_user_polexpire {
403	struct xfrm_userpolicy_info	pol;
404	__u8				hard;
405};
406
407struct xfrm_usersa_flush {
408	__u8				proto;
409};
410
411struct xfrm_user_report {
412	__u8				proto;
413	struct xfrm_selector		sel;
414};
415
416struct xfrm_user_migrate {
417	xfrm_address_t			old_daddr;
418	xfrm_address_t			old_saddr;
419	xfrm_address_t			new_daddr;
420	xfrm_address_t			new_saddr;
421	__u8				proto;
422	__u8				mode;
423	__u16				reserved;
424	__u32				reqid;
425	__u16				old_family;
426	__u16				new_family;
427};
428
429/* backwards compatibility for userspace */
430#define XFRMGRP_ACQUIRE		1
431#define XFRMGRP_EXPIRE		2
432#define XFRMGRP_SA		4
433#define XFRMGRP_POLICY		8
434#define XFRMGRP_REPORT		0x20
435
436enum xfrm_nlgroups {
437	XFRMNLGRP_NONE,
438#define XFRMNLGRP_NONE		XFRMNLGRP_NONE
439	XFRMNLGRP_ACQUIRE,
440#define XFRMNLGRP_ACQUIRE	XFRMNLGRP_ACQUIRE
441	XFRMNLGRP_EXPIRE,
442#define XFRMNLGRP_EXPIRE	XFRMNLGRP_EXPIRE
443	XFRMNLGRP_SA,
444#define XFRMNLGRP_SA		XFRMNLGRP_SA
445	XFRMNLGRP_POLICY,
446#define XFRMNLGRP_POLICY	XFRMNLGRP_POLICY
447	XFRMNLGRP_AEVENTS,
448#define XFRMNLGRP_AEVENTS	XFRMNLGRP_AEVENTS
449	XFRMNLGRP_REPORT,
450#define XFRMNLGRP_REPORT	XFRMNLGRP_REPORT
451	XFRMNLGRP_MIGRATE,
452#define XFRMNLGRP_MIGRATE	XFRMNLGRP_MIGRATE
453	__XFRMNLGRP_MAX
454};
455#define XFRMNLGRP_MAX	(__XFRMNLGRP_MAX - 1)
456
457#endif /* _LINUX_XFRM_H */
458