tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 __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 */
23struct xfrm_id
24{
25 xfrm_address_t daddr;
26 __u32 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 __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
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 int alg_key_len; /* in bits */
96 char alg_key[0];
97};
98
99struct xfrm_stats {
100 __u32 replay_window;
101 __u32 replay;
102 __u32 integrity_failed;
103};
104
105enum
106{
107 XFRM_POLICY_IN = 0,
108 XFRM_POLICY_OUT = 1,
109 XFRM_POLICY_FWD = 2,
110 XFRM_POLICY_MAX = 3
111};
112
113enum
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. */
122enum {
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_MAX
160};
161#define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
162
163#define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
164
165/*
166 * Generic LSM security context for comunicating to user space
167 * NOTE: Same format as sadb_x_sec_ctx
168 */
169struct xfrm_user_sec_ctx {
170 __u16 len;
171 __u16 exttype;
172 __u8 ctx_alg; /* LSMs: e.g., selinux == 1 */
173 __u8 ctx_doi;
174 __u16 ctx_len;
175};
176
177struct xfrm_user_tmpl {
178 struct xfrm_id id;
179 __u16 family;
180 xfrm_address_t saddr;
181 __u32 reqid;
182 __u8 mode;
183 __u8 share;
184 __u8 optional;
185 __u32 aalgos;
186 __u32 ealgos;
187 __u32 calgos;
188};
189
190struct xfrm_encap_tmpl {
191 __u16 encap_type;
192 __u16 encap_sport;
193 __u16 encap_dport;
194 xfrm_address_t encap_oa;
195};
196
197/* Netlink message attributes. */
198enum xfrm_attr_type_t {
199 XFRMA_UNSPEC,
200 XFRMA_ALG_AUTH, /* struct xfrm_algo */
201 XFRMA_ALG_CRYPT, /* struct xfrm_algo */
202 XFRMA_ALG_COMP, /* struct xfrm_algo */
203 XFRMA_ENCAP, /* struct xfrm_algo + struct xfrm_encap_tmpl */
204 XFRMA_TMPL, /* 1 or more struct xfrm_user_tmpl */
205 XFRMA_SA,
206 XFRMA_POLICY,
207 XFRMA_SEC_CTX, /* struct xfrm_sec_ctx */
208 __XFRMA_MAX
209
210#define XFRMA_MAX (__XFRMA_MAX - 1)
211};
212
213struct xfrm_usersa_info {
214 struct xfrm_selector sel;
215 struct xfrm_id id;
216 xfrm_address_t saddr;
217 struct xfrm_lifetime_cfg lft;
218 struct xfrm_lifetime_cur curlft;
219 struct xfrm_stats stats;
220 __u32 seq;
221 __u32 reqid;
222 __u16 family;
223 __u8 mode; /* 0=transport,1=tunnel */
224 __u8 replay_window;
225 __u8 flags;
226#define XFRM_STATE_NOECN 1
227#define XFRM_STATE_DECAP_DSCP 2
228#define XFRM_STATE_NOPMTUDISC 4
229};
230
231struct xfrm_usersa_id {
232 xfrm_address_t daddr;
233 __u32 spi;
234 __u16 family;
235 __u8 proto;
236};
237
238struct xfrm_userspi_info {
239 struct xfrm_usersa_info info;
240 __u32 min;
241 __u32 max;
242};
243
244struct xfrm_userpolicy_info {
245 struct xfrm_selector sel;
246 struct xfrm_lifetime_cfg lft;
247 struct xfrm_lifetime_cur curlft;
248 __u32 priority;
249 __u32 index;
250 __u8 dir;
251 __u8 action;
252#define XFRM_POLICY_ALLOW 0
253#define XFRM_POLICY_BLOCK 1
254 __u8 flags;
255#define XFRM_POLICY_LOCALOK 1 /* Allow user to override global policy */
256 __u8 share;
257};
258
259struct xfrm_userpolicy_id {
260 struct xfrm_selector sel;
261 __u32 index;
262 __u8 dir;
263};
264
265struct xfrm_user_acquire {
266 struct xfrm_id id;
267 xfrm_address_t saddr;
268 struct xfrm_selector sel;
269 struct xfrm_userpolicy_info policy;
270 __u32 aalgos;
271 __u32 ealgos;
272 __u32 calgos;
273 __u32 seq;
274};
275
276struct xfrm_user_expire {
277 struct xfrm_usersa_info state;
278 __u8 hard;
279};
280
281struct xfrm_user_polexpire {
282 struct xfrm_userpolicy_info pol;
283 __u8 hard;
284};
285
286struct xfrm_usersa_flush {
287 __u8 proto;
288};
289
290#ifndef __KERNEL__
291/* backwards compatibility for userspace */
292#define XFRMGRP_ACQUIRE 1
293#define XFRMGRP_EXPIRE 2
294#define XFRMGRP_SA 4
295#define XFRMGRP_POLICY 8
296#endif
297
298enum xfrm_nlgroups {
299 XFRMNLGRP_NONE,
300#define XFRMNLGRP_NONE XFRMNLGRP_NONE
301 XFRMNLGRP_ACQUIRE,
302#define XFRMNLGRP_ACQUIRE XFRMNLGRP_ACQUIRE
303 XFRMNLGRP_EXPIRE,
304#define XFRMNLGRP_EXPIRE XFRMNLGRP_EXPIRE
305 XFRMNLGRP_SA,
306#define XFRMNLGRP_SA XFRMNLGRP_SA
307 XFRMNLGRP_POLICY,
308#define XFRMNLGRP_POLICY XFRMNLGRP_POLICY
309 __XFRMNLGRP_MAX
310};
311#define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1)
312
313#endif /* _LINUX_XFRM_H */