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1da177e4 LT |
1 | #ifndef _NET_XFRM_H |
2 | #define _NET_XFRM_H | |
3 | ||
aabc9761 | 4 | #include <linux/compiler.h> |
1da177e4 LT |
5 | #include <linux/xfrm.h> |
6 | #include <linux/spinlock.h> | |
7 | #include <linux/list.h> | |
8 | #include <linux/skbuff.h> | |
14c85021 | 9 | #include <linux/socket.h> |
1da177e4 | 10 | #include <linux/pfkeyv2.h> |
5794708f | 11 | #include <linux/ipsec.h> |
1da177e4 | 12 | #include <linux/in6.h> |
4a3e2f71 | 13 | #include <linux/mutex.h> |
ab5f5e8b | 14 | #include <linux/audit.h> |
1da177e4 LT |
15 | |
16 | #include <net/sock.h> | |
17 | #include <net/dst.h> | |
436a0a40 | 18 | #include <net/ip.h> |
1da177e4 LT |
19 | #include <net/route.h> |
20 | #include <net/ipv6.h> | |
21 | #include <net/ip6_fib.h> | |
22 | ||
d3d6dd3a MN |
23 | #define XFRM_PROTO_ESP 50 |
24 | #define XFRM_PROTO_AH 51 | |
25 | #define XFRM_PROTO_COMP 108 | |
26 | #define XFRM_PROTO_IPIP 4 | |
27 | #define XFRM_PROTO_IPV6 41 | |
28 | #define XFRM_PROTO_ROUTING IPPROTO_ROUTING | |
29 | #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS | |
30 | ||
1da177e4 | 31 | #define XFRM_ALIGN8(len) (((len) + 7) & ~7) |
b59f45d0 HX |
32 | #define MODULE_ALIAS_XFRM_MODE(family, encap) \ |
33 | MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) | |
d3d6dd3a MN |
34 | #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ |
35 | MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) | |
1da177e4 | 36 | |
f8cd5488 JHS |
37 | extern struct sock *xfrm_nl; |
38 | extern u32 sysctl_xfrm_aevent_etime; | |
39 | extern u32 sysctl_xfrm_aevent_rseqth; | |
a37ae408 PE |
40 | extern int sysctl_xfrm_larval_drop; |
41 | extern u32 sysctl_xfrm_acq_expires; | |
f8cd5488 | 42 | |
4a3e2f71 | 43 | extern struct mutex xfrm_cfg_mutex; |
1da177e4 LT |
44 | |
45 | /* Organization of SPD aka "XFRM rules" | |
46 | ------------------------------------ | |
47 | ||
48 | Basic objects: | |
49 | - policy rule, struct xfrm_policy (=SPD entry) | |
50 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) | |
51 | - instance of a transformer, struct xfrm_state (=SA) | |
52 | - template to clone xfrm_state, struct xfrm_tmpl | |
53 | ||
54 | SPD is plain linear list of xfrm_policy rules, ordered by priority. | |
55 | (To be compatible with existing pfkeyv2 implementations, | |
56 | many rules with priority of 0x7fffffff are allowed to exist and | |
57 | such rules are ordered in an unpredictable way, thanks to bsd folks.) | |
58 | ||
59 | Lookup is plain linear search until the first match with selector. | |
60 | ||
61 | If "action" is "block", then we prohibit the flow, otherwise: | |
62 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, | |
63 | policy entry has list of up to XFRM_MAX_DEPTH transformations, | |
64 | described by templates xfrm_tmpl. Each template is resolved | |
65 | to a complete xfrm_state (see below) and we pack bundle of transformations | |
66 | to a dst_entry returned to requestor. | |
67 | ||
68 | dst -. xfrm .-> xfrm_state #1 | |
69 | |---. child .-> dst -. xfrm .-> xfrm_state #2 | |
70 | |---. child .-> dst -. xfrm .-> xfrm_state #3 | |
71 | |---. child .-> NULL | |
72 | ||
73 | Bundles are cached at xrfm_policy struct (field ->bundles). | |
74 | ||
75 | ||
76 | Resolution of xrfm_tmpl | |
77 | ----------------------- | |
78 | Template contains: | |
79 | 1. ->mode Mode: transport or tunnel | |
80 | 2. ->id.proto Protocol: AH/ESP/IPCOMP | |
81 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. | |
82 | Q: allow to resolve security gateway? | |
83 | 4. ->id.spi If not zero, static SPI. | |
84 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. | |
85 | 6. ->algos List of allowed algos. Plain bitmask now. | |
86 | Q: ealgos, aalgos, calgos. What a mess... | |
87 | 7. ->share Sharing mode. | |
88 | Q: how to implement private sharing mode? To add struct sock* to | |
89 | flow id? | |
90 | ||
91 | Having this template we search through SAD searching for entries | |
92 | with appropriate mode/proto/algo, permitted by selector. | |
93 | If no appropriate entry found, it is requested from key manager. | |
94 | ||
95 | PROBLEMS: | |
96 | Q: How to find all the bundles referring to a physical path for | |
97 | PMTU discovery? Seems, dst should contain list of all parents... | |
98 | and enter to infinite locking hierarchy disaster. | |
99 | No! It is easier, we will not search for them, let them find us. | |
100 | We add genid to each dst plus pointer to genid of raw IP route, | |
101 | pmtu disc will update pmtu on raw IP route and increase its genid. | |
102 | dst_check() will see this for top level and trigger resyncing | |
103 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. | |
104 | */ | |
105 | ||
106 | /* Full description of state of transformer. */ | |
107 | struct xfrm_state | |
108 | { | |
109 | /* Note: bydst is re-used during gc */ | |
8f126e37 DM |
110 | struct hlist_node bydst; |
111 | struct hlist_node bysrc; | |
112 | struct hlist_node byspi; | |
1da177e4 LT |
113 | |
114 | atomic_t refcnt; | |
115 | spinlock_t lock; | |
116 | ||
117 | struct xfrm_id id; | |
118 | struct xfrm_selector sel; | |
119 | ||
9d4a706d DM |
120 | u32 genid; |
121 | ||
1da177e4 LT |
122 | /* Key manger bits */ |
123 | struct { | |
124 | u8 state; | |
125 | u8 dying; | |
126 | u32 seq; | |
127 | } km; | |
128 | ||
129 | /* Parameters of this state. */ | |
130 | struct { | |
131 | u32 reqid; | |
132 | u8 mode; | |
133 | u8 replay_window; | |
134 | u8 aalgo, ealgo, calgo; | |
135 | u8 flags; | |
136 | u16 family; | |
137 | xfrm_address_t saddr; | |
138 | int header_len; | |
139 | int trailer_len; | |
140 | } props; | |
141 | ||
142 | struct xfrm_lifetime_cfg lft; | |
143 | ||
144 | /* Data for transformer */ | |
145 | struct xfrm_algo *aalg; | |
146 | struct xfrm_algo *ealg; | |
147 | struct xfrm_algo *calg; | |
148 | ||
149 | /* Data for encapsulator */ | |
150 | struct xfrm_encap_tmpl *encap; | |
151 | ||
060f02a3 NT |
152 | /* Data for care-of address */ |
153 | xfrm_address_t *coaddr; | |
154 | ||
1da177e4 LT |
155 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
156 | struct xfrm_state *tunnel; | |
157 | ||
158 | /* If a tunnel, number of users + 1 */ | |
159 | atomic_t tunnel_users; | |
160 | ||
161 | /* State for replay detection */ | |
162 | struct xfrm_replay_state replay; | |
163 | ||
f8cd5488 JHS |
164 | /* Replay detection state at the time we sent the last notification */ |
165 | struct xfrm_replay_state preplay; | |
166 | ||
2717096a JHS |
167 | /* internal flag that only holds state for delayed aevent at the |
168 | * moment | |
169 | */ | |
170 | u32 xflags; | |
171 | ||
f8cd5488 JHS |
172 | /* Replay detection notification settings */ |
173 | u32 replay_maxage; | |
174 | u32 replay_maxdiff; | |
175 | ||
176 | /* Replay detection notification timer */ | |
177 | struct timer_list rtimer; | |
178 | ||
1da177e4 LT |
179 | /* Statistics */ |
180 | struct xfrm_stats stats; | |
181 | ||
182 | struct xfrm_lifetime_cur curlft; | |
183 | struct timer_list timer; | |
184 | ||
9afaca05 | 185 | /* Last used time */ |
d26f3984 | 186 | unsigned long lastused; |
9afaca05 | 187 | |
1da177e4 LT |
188 | /* Reference to data common to all the instances of this |
189 | * transformer. */ | |
190 | struct xfrm_type *type; | |
13996378 HX |
191 | struct xfrm_mode *inner_mode; |
192 | struct xfrm_mode *outer_mode; | |
1da177e4 | 193 | |
df71837d TJ |
194 | /* Security context */ |
195 | struct xfrm_sec_ctx *security; | |
196 | ||
1da177e4 LT |
197 | /* Private data of this transformer, format is opaque, |
198 | * interpreted by xfrm_type methods. */ | |
199 | void *data; | |
200 | }; | |
201 | ||
2717096a JHS |
202 | /* xflags - make enum if more show up */ |
203 | #define XFRM_TIME_DEFER 1 | |
204 | ||
1da177e4 LT |
205 | enum { |
206 | XFRM_STATE_VOID, | |
207 | XFRM_STATE_ACQ, | |
208 | XFRM_STATE_VALID, | |
209 | XFRM_STATE_ERROR, | |
210 | XFRM_STATE_EXPIRED, | |
211 | XFRM_STATE_DEAD | |
212 | }; | |
213 | ||
26b15dad JHS |
214 | /* callback structure passed from either netlink or pfkey */ |
215 | struct km_event | |
216 | { | |
bf08867f HX |
217 | union { |
218 | u32 hard; | |
219 | u32 proto; | |
220 | u32 byid; | |
f8cd5488 | 221 | u32 aevent; |
f7b6983f | 222 | u32 type; |
bf08867f HX |
223 | } data; |
224 | ||
26b15dad JHS |
225 | u32 seq; |
226 | u32 pid; | |
227 | u32 event; | |
228 | }; | |
229 | ||
25ee3286 | 230 | struct net_device; |
1da177e4 LT |
231 | struct xfrm_type; |
232 | struct xfrm_dst; | |
233 | struct xfrm_policy_afinfo { | |
234 | unsigned short family; | |
1da177e4 LT |
235 | struct dst_ops *dst_ops; |
236 | void (*garbage_collect)(void); | |
66cdb3ca HX |
237 | struct dst_entry *(*dst_lookup)(int tos, xfrm_address_t *saddr, |
238 | xfrm_address_t *daddr); | |
a1e59abf | 239 | int (*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr); |
1da177e4 | 240 | struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); |
1da177e4 LT |
241 | void (*decode_session)(struct sk_buff *skb, |
242 | struct flowi *fl); | |
25ee3286 HX |
243 | int (*get_tos)(struct flowi *fl); |
244 | int (*fill_dst)(struct xfrm_dst *xdst, | |
245 | struct net_device *dev); | |
1da177e4 LT |
246 | }; |
247 | ||
248 | extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); | |
249 | extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); | |
26b15dad JHS |
250 | extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); |
251 | extern void km_state_notify(struct xfrm_state *x, struct km_event *c); | |
1da177e4 LT |
252 | |
253 | struct xfrm_tmpl; | |
980ebd25 | 254 | extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
53bc6b4d JHS |
255 | extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); |
256 | extern int __xfrm_state_delete(struct xfrm_state *x); | |
257 | ||
1da177e4 | 258 | struct xfrm_state_afinfo { |
17c2a42a | 259 | unsigned int family; |
36cf9acf | 260 | unsigned int proto; |
227620e2 | 261 | unsigned int eth_proto; |
17c2a42a | 262 | struct module *owner; |
aa5d62cc HX |
263 | struct xfrm_type *type_map[IPPROTO_MAX]; |
264 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; | |
d094cd83 | 265 | int (*init_flags)(struct xfrm_state *x); |
1da177e4 LT |
266 | void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, |
267 | struct xfrm_tmpl *tmpl, | |
268 | xfrm_address_t *daddr, xfrm_address_t *saddr); | |
41a49cc3 MN |
269 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
270 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); | |
cdca7265 | 271 | int (*output)(struct sk_buff *skb); |
227620e2 HX |
272 | int (*extract_input)(struct xfrm_state *x, |
273 | struct sk_buff *skb); | |
36cf9acf HX |
274 | int (*extract_output)(struct xfrm_state *x, |
275 | struct sk_buff *skb); | |
716062fd HX |
276 | int (*transport_finish)(struct sk_buff *skb, |
277 | int async); | |
1da177e4 LT |
278 | }; |
279 | ||
280 | extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); | |
281 | extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
282 | ||
283 | extern void xfrm_state_delete_tunnel(struct xfrm_state *x); | |
284 | ||
1da177e4 LT |
285 | struct xfrm_type |
286 | { | |
287 | char *description; | |
288 | struct module *owner; | |
289 | __u8 proto; | |
1b5c2299 MN |
290 | __u8 flags; |
291 | #define XFRM_TYPE_NON_FRAGMENT 1 | |
436a0a40 | 292 | #define XFRM_TYPE_REPLAY_PROT 2 |
f04e7e8d HX |
293 | #define XFRM_TYPE_LOCAL_COADDR 4 |
294 | #define XFRM_TYPE_REMOTE_COADDR 8 | |
1da177e4 | 295 | |
72cb6962 | 296 | int (*init_state)(struct xfrm_state *x); |
1da177e4 | 297 | void (*destructor)(struct xfrm_state *); |
e695633e | 298 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 299 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
df0ba92a | 300 | int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); |
aee5adb4 | 301 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
1da177e4 | 302 | /* Estimate maximal size of result of transformation of a dgram */ |
c5c25238 | 303 | u32 (*get_mtu)(struct xfrm_state *, int size); |
1da177e4 LT |
304 | }; |
305 | ||
1da177e4 LT |
306 | extern int xfrm_register_type(struct xfrm_type *type, unsigned short family); |
307 | extern int xfrm_unregister_type(struct xfrm_type *type, unsigned short family); | |
1da177e4 | 308 | |
b59f45d0 | 309 | struct xfrm_mode { |
227620e2 HX |
310 | /* |
311 | * Remove encapsulation header. | |
312 | * | |
313 | * The IP header will be moved over the top of the encapsulation | |
314 | * header. | |
315 | * | |
316 | * On entry, the transport header shall point to where the IP header | |
317 | * should be and the network header shall be set to where the IP | |
318 | * header currently is. skb->data shall point to the start of the | |
319 | * payload. | |
320 | */ | |
321 | int (*input2)(struct xfrm_state *x, struct sk_buff *skb); | |
322 | ||
323 | /* | |
324 | * This is the actual input entry point. | |
325 | * | |
326 | * For transport mode and equivalent this would be identical to | |
327 | * input2 (which does not need to be set). While tunnel mode | |
328 | * and equivalent would set this to the tunnel encapsulation function | |
329 | * xfrm4_prepare_input that would in turn call input2. | |
330 | */ | |
b59f45d0 | 331 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); |
37fedd3a HX |
332 | |
333 | /* | |
334 | * Add encapsulation header. | |
335 | * | |
336 | * On exit, the transport header will be set to the start of the | |
337 | * encapsulation header to be filled in by x->type->output and | |
338 | * the mac header will be set to the nextheader (protocol for | |
339 | * IPv4) field of the extension header directly preceding the | |
340 | * encapsulation header, or in its absence, that of the top IP | |
341 | * header. The value of the network header will always point | |
342 | * to the top IP header while skb->data will point to the payload. | |
343 | */ | |
36cf9acf HX |
344 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); |
345 | ||
346 | /* | |
347 | * This is the actual output entry point. | |
348 | * | |
349 | * For transport mode and equivalent this would be identical to | |
350 | * output2 (which does not need to be set). While tunnel mode | |
351 | * and equivalent would set this to a tunnel encapsulation function | |
352 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn | |
353 | * call output2. | |
354 | */ | |
355 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); | |
b59f45d0 | 356 | |
17c2a42a | 357 | struct xfrm_state_afinfo *afinfo; |
b59f45d0 HX |
358 | struct module *owner; |
359 | unsigned int encap; | |
1bfcb10f HX |
360 | int flags; |
361 | }; | |
362 | ||
363 | /* Flags for xfrm_mode. */ | |
364 | enum { | |
365 | XFRM_MODE_FLAG_TUNNEL = 1, | |
b59f45d0 HX |
366 | }; |
367 | ||
368 | extern int xfrm_register_mode(struct xfrm_mode *mode, int family); | |
369 | extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); | |
b59f45d0 | 370 | |
1da177e4 LT |
371 | struct xfrm_tmpl |
372 | { | |
373 | /* id in template is interpreted as: | |
374 | * daddr - destination of tunnel, may be zero for transport mode. | |
375 | * spi - zero to acquire spi. Not zero if spi is static, then | |
376 | * daddr must be fixed too. | |
377 | * proto - AH/ESP/IPCOMP | |
378 | */ | |
379 | struct xfrm_id id; | |
380 | ||
381 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
382 | xfrm_address_t saddr; | |
383 | ||
76b3f055 MK |
384 | unsigned short encap_family; |
385 | ||
1da177e4 LT |
386 | __u32 reqid; |
387 | ||
7e49e6de | 388 | /* Mode: transport, tunnel etc. */ |
1da177e4 LT |
389 | __u8 mode; |
390 | ||
391 | /* Sharing mode: unique, this session only, this user only etc. */ | |
392 | __u8 share; | |
393 | ||
394 | /* May skip this transfomration if no SA is found */ | |
395 | __u8 optional; | |
396 | ||
397 | /* Bit mask of algos allowed for acquisition */ | |
398 | __u32 aalgos; | |
399 | __u32 ealgos; | |
400 | __u32 calgos; | |
401 | }; | |
402 | ||
622dc828 | 403 | #define XFRM_MAX_DEPTH 6 |
1da177e4 LT |
404 | |
405 | struct xfrm_policy | |
406 | { | |
407 | struct xfrm_policy *next; | |
2518c7c2 DM |
408 | struct hlist_node bydst; |
409 | struct hlist_node byidx; | |
1da177e4 LT |
410 | |
411 | /* This lock only affects elements except for entry. */ | |
412 | rwlock_t lock; | |
413 | atomic_t refcnt; | |
414 | struct timer_list timer; | |
415 | ||
416 | u32 priority; | |
417 | u32 index; | |
418 | struct xfrm_selector selector; | |
419 | struct xfrm_lifetime_cfg lft; | |
420 | struct xfrm_lifetime_cur curlft; | |
421 | struct dst_entry *bundles; | |
46ca5f5d ACM |
422 | u16 family; |
423 | u8 type; | |
424 | u8 action; | |
425 | u8 flags; | |
426 | u8 dead; | |
427 | u8 xfrm_nr; | |
428 | /* XXX 1 byte hole, try to pack */ | |
df71837d | 429 | struct xfrm_sec_ctx *security; |
1da177e4 LT |
430 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
431 | }; | |
432 | ||
80c9abaa SS |
433 | struct xfrm_migrate { |
434 | xfrm_address_t old_daddr; | |
435 | xfrm_address_t old_saddr; | |
436 | xfrm_address_t new_daddr; | |
437 | xfrm_address_t new_saddr; | |
438 | u8 proto; | |
439 | u8 mode; | |
440 | u16 reserved; | |
441 | u32 reqid; | |
442 | u16 old_family; | |
443 | u16 new_family; | |
444 | }; | |
445 | ||
f8cd5488 JHS |
446 | #define XFRM_KM_TIMEOUT 30 |
447 | /* which seqno */ | |
448 | #define XFRM_REPLAY_SEQ 1 | |
449 | #define XFRM_REPLAY_OSEQ 2 | |
450 | #define XFRM_REPLAY_SEQ_MASK 3 | |
451 | /* what happened */ | |
452 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
453 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
454 | ||
455 | /* default aevent timeout in units of 100ms */ | |
456 | #define XFRM_AE_ETIME 10 | |
457 | /* Async Event timer multiplier */ | |
458 | #define XFRM_AE_ETH_M 10 | |
459 | /* default seq threshold size */ | |
460 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 LT |
461 | |
462 | struct xfrm_mgr | |
463 | { | |
464 | struct list_head list; | |
465 | char *id; | |
26b15dad | 466 | int (*notify)(struct xfrm_state *x, struct km_event *c); |
1da177e4 | 467 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); |
cb969f07 | 468 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 469 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
26b15dad | 470 | int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); |
97a64b45 | 471 | int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
80c9abaa | 472 | int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles); |
1da177e4 LT |
473 | }; |
474 | ||
475 | extern int xfrm_register_km(struct xfrm_mgr *km); | |
476 | extern int xfrm_unregister_km(struct xfrm_mgr *km); | |
477 | ||
2518c7c2 | 478 | extern unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2]; |
1da177e4 | 479 | |
436a0a40 HX |
480 | /* |
481 | * This structure is used for the duration where packets are being | |
482 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
483 | * area beyond the generic IP part may be overwritten. | |
484 | */ | |
485 | struct xfrm_skb_cb { | |
486 | union { | |
487 | struct inet_skb_parm h4; | |
488 | struct inet6_skb_parm h6; | |
489 | } header; | |
490 | ||
491 | /* Sequence number for replay protection. */ | |
492 | u64 seq; | |
493 | }; | |
494 | ||
495 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
496 | ||
36cf9acf HX |
497 | /* |
498 | * This structure is used by the afinfo prepare_input/prepare_output functions | |
499 | * to transmit header information to the mode input/output functions. | |
500 | */ | |
501 | struct xfrm_mode_skb_cb { | |
502 | union { | |
503 | struct inet_skb_parm h4; | |
504 | struct inet6_skb_parm h6; | |
505 | } header; | |
506 | ||
507 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
508 | __be16 id; | |
509 | __be16 frag_off; | |
510 | ||
511 | /* TOS for IPv4, class for IPv6. */ | |
512 | u8 tos; | |
513 | ||
514 | /* TTL for IPv4, hop limitfor IPv6. */ | |
515 | u8 ttl; | |
516 | ||
517 | /* Protocol for IPv4, NH for IPv6. */ | |
518 | u8 protocol; | |
519 | ||
520 | /* Used by IPv6 only, zero for IPv4. */ | |
521 | u8 flow_lbl[3]; | |
522 | }; | |
523 | ||
524 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
525 | ||
716062fd HX |
526 | /* |
527 | * This structure is used by the input processing to locate the SPI and | |
528 | * related information. | |
529 | */ | |
530 | struct xfrm_spi_skb_cb { | |
531 | union { | |
532 | struct inet_skb_parm h4; | |
533 | struct inet6_skb_parm h6; | |
534 | } header; | |
535 | ||
716062fd HX |
536 | unsigned int daddroff; |
537 | }; | |
538 | ||
539 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) | |
540 | ||
161a09e7 JL |
541 | /* Audit Information */ |
542 | struct xfrm_audit | |
543 | { | |
ab5f5e8b | 544 | u32 loginuid; |
161a09e7 JL |
545 | u32 secid; |
546 | }; | |
c9204d9c JL |
547 | |
548 | #ifdef CONFIG_AUDITSYSCALL | |
ab5f5e8b JL |
549 | static inline struct audit_buffer *xfrm_audit_start(u32 auid, u32 sid) |
550 | { | |
551 | struct audit_buffer *audit_buf = NULL; | |
552 | char *secctx; | |
553 | u32 secctx_len; | |
554 | ||
555 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, | |
556 | AUDIT_MAC_IPSEC_EVENT); | |
557 | if (audit_buf == NULL) | |
558 | return NULL; | |
559 | ||
560 | audit_log_format(audit_buf, "auid=%u", auid); | |
561 | ||
562 | if (sid != 0 && | |
563 | security_secid_to_secctx(sid, &secctx, &secctx_len) == 0) { | |
564 | audit_log_format(audit_buf, " subj=%s", secctx); | |
565 | security_release_secctx(secctx, secctx_len); | |
566 | } else | |
567 | audit_log_task_context(audit_buf); | |
568 | return audit_buf; | |
569 | } | |
570 | ||
571 | extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
572 | u32 auid, u32 sid); | |
573 | extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
574 | u32 auid, u32 sid); | |
575 | extern void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
576 | u32 auid, u32 sid); | |
577 | extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
578 | u32 auid, u32 sid); | |
c9204d9c | 579 | #else |
ab5f5e8b JL |
580 | #define xfrm_audit_policy_add(x, r, a, s) do { ; } while (0) |
581 | #define xfrm_audit_policy_delete(x, r, a, s) do { ; } while (0) | |
582 | #define xfrm_audit_state_add(x, r, a, s) do { ; } while (0) | |
583 | #define xfrm_audit_state_delete(x, r, a, s) do { ; } while (0) | |
c9204d9c | 584 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 585 | |
1da177e4 LT |
586 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
587 | { | |
588 | if (likely(policy != NULL)) | |
589 | atomic_inc(&policy->refcnt); | |
590 | } | |
591 | ||
592 | extern void __xfrm_policy_destroy(struct xfrm_policy *policy); | |
593 | ||
594 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
595 | { | |
596 | if (atomic_dec_and_test(&policy->refcnt)) | |
597 | __xfrm_policy_destroy(policy); | |
598 | } | |
599 | ||
4e81bb83 MN |
600 | #ifdef CONFIG_XFRM_SUB_POLICY |
601 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) | |
602 | { | |
603 | int i; | |
604 | for (i = npols - 1; i >= 0; --i) | |
605 | xfrm_pol_put(pols[i]); | |
606 | } | |
607 | #else | |
608 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) | |
609 | { | |
610 | xfrm_pol_put(pols[0]); | |
611 | } | |
612 | #endif | |
613 | ||
1da177e4 LT |
614 | extern void __xfrm_state_destroy(struct xfrm_state *); |
615 | ||
21380b81 HX |
616 | static inline void __xfrm_state_put(struct xfrm_state *x) |
617 | { | |
618 | atomic_dec(&x->refcnt); | |
619 | } | |
620 | ||
1da177e4 LT |
621 | static inline void xfrm_state_put(struct xfrm_state *x) |
622 | { | |
623 | if (atomic_dec_and_test(&x->refcnt)) | |
624 | __xfrm_state_destroy(x); | |
625 | } | |
626 | ||
627 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
628 | { | |
629 | atomic_inc(&x->refcnt); | |
630 | } | |
631 | ||
632 | static __inline__ int addr_match(void *token1, void *token2, int prefixlen) | |
633 | { | |
5f19343f AV |
634 | __be32 *a1 = token1; |
635 | __be32 *a2 = token2; | |
1da177e4 LT |
636 | int pdw; |
637 | int pbi; | |
638 | ||
639 | pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ | |
640 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ | |
641 | ||
642 | if (pdw) | |
643 | if (memcmp(a1, a2, pdw << 2)) | |
644 | return 0; | |
645 | ||
646 | if (pbi) { | |
5f19343f | 647 | __be32 mask; |
1da177e4 LT |
648 | |
649 | mask = htonl((0xffffffff) << (32 - pbi)); | |
650 | ||
651 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
652 | return 0; | |
653 | } | |
654 | ||
655 | return 1; | |
656 | } | |
657 | ||
658 | static __inline__ | |
f9d07e41 | 659 | __be16 xfrm_flowi_sport(struct flowi *fl) |
1da177e4 | 660 | { |
f9d07e41 | 661 | __be16 port; |
1da177e4 LT |
662 | switch(fl->proto) { |
663 | case IPPROTO_TCP: | |
664 | case IPPROTO_UDP: | |
ba4e58ec | 665 | case IPPROTO_UDPLITE: |
1da177e4 LT |
666 | case IPPROTO_SCTP: |
667 | port = fl->fl_ip_sport; | |
668 | break; | |
669 | case IPPROTO_ICMP: | |
670 | case IPPROTO_ICMPV6: | |
671 | port = htons(fl->fl_icmp_type); | |
672 | break; | |
2ce4272a MN |
673 | case IPPROTO_MH: |
674 | port = htons(fl->fl_mh_type); | |
675 | break; | |
1da177e4 LT |
676 | default: |
677 | port = 0; /*XXX*/ | |
678 | } | |
679 | return port; | |
680 | } | |
681 | ||
682 | static __inline__ | |
f9d07e41 | 683 | __be16 xfrm_flowi_dport(struct flowi *fl) |
1da177e4 | 684 | { |
f9d07e41 | 685 | __be16 port; |
1da177e4 LT |
686 | switch(fl->proto) { |
687 | case IPPROTO_TCP: | |
688 | case IPPROTO_UDP: | |
ba4e58ec | 689 | case IPPROTO_UDPLITE: |
1da177e4 LT |
690 | case IPPROTO_SCTP: |
691 | port = fl->fl_ip_dport; | |
692 | break; | |
693 | case IPPROTO_ICMP: | |
694 | case IPPROTO_ICMPV6: | |
695 | port = htons(fl->fl_icmp_code); | |
696 | break; | |
697 | default: | |
698 | port = 0; /*XXX*/ | |
699 | } | |
700 | return port; | |
701 | } | |
702 | ||
77681021 AM |
703 | extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, |
704 | unsigned short family); | |
1da177e4 | 705 | |
df71837d TJ |
706 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
707 | /* If neither has a context --> match | |
708 | * Otherwise, both must have a context and the sids, doi, alg must match | |
709 | */ | |
710 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
711 | { | |
712 | return ((!s1 && !s2) || | |
713 | (s1 && s2 && | |
714 | (s1->ctx_sid == s2->ctx_sid) && | |
715 | (s1->ctx_doi == s2->ctx_doi) && | |
716 | (s1->ctx_alg == s2->ctx_alg))); | |
717 | } | |
718 | #else | |
719 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
720 | { | |
721 | return 1; | |
722 | } | |
723 | #endif | |
724 | ||
1da177e4 LT |
725 | /* A struct encoding bundle of transformations to apply to some set of flow. |
726 | * | |
727 | * dst->child points to the next element of bundle. | |
728 | * dst->xfrm points to an instanse of transformer. | |
729 | * | |
730 | * Due to unfortunate limitations of current routing cache, which we | |
731 | * have no time to fix, it mirrors struct rtable and bound to the same | |
732 | * routing key, including saddr,daddr. However, we can have many of | |
733 | * bundles differing by session id. All the bundles grow from a parent | |
734 | * policy rule. | |
735 | */ | |
736 | struct xfrm_dst | |
737 | { | |
738 | union { | |
1da177e4 LT |
739 | struct dst_entry dst; |
740 | struct rtable rt; | |
741 | struct rt6_info rt6; | |
742 | } u; | |
743 | struct dst_entry *route; | |
157bfc25 MN |
744 | #ifdef CONFIG_XFRM_SUB_POLICY |
745 | struct flowi *origin; | |
746 | struct xfrm_selector *partner; | |
747 | #endif | |
9d4a706d | 748 | u32 genid; |
1da177e4 LT |
749 | u32 route_mtu_cached; |
750 | u32 child_mtu_cached; | |
92d63dec HY |
751 | u32 route_cookie; |
752 | u32 path_cookie; | |
1da177e4 LT |
753 | }; |
754 | ||
aabc9761 HX |
755 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
756 | { | |
757 | dst_release(xdst->route); | |
758 | if (likely(xdst->u.dst.xfrm)) | |
759 | xfrm_state_put(xdst->u.dst.xfrm); | |
157bfc25 MN |
760 | #ifdef CONFIG_XFRM_SUB_POLICY |
761 | kfree(xdst->origin); | |
762 | xdst->origin = NULL; | |
763 | kfree(xdst->partner); | |
764 | xdst->partner = NULL; | |
765 | #endif | |
aabc9761 HX |
766 | } |
767 | ||
768 | extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); | |
769 | ||
1da177e4 LT |
770 | struct sec_path |
771 | { | |
772 | atomic_t refcnt; | |
773 | int len; | |
dbe5b4aa | 774 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
1da177e4 LT |
775 | }; |
776 | ||
777 | static inline struct sec_path * | |
778 | secpath_get(struct sec_path *sp) | |
779 | { | |
780 | if (sp) | |
781 | atomic_inc(&sp->refcnt); | |
782 | return sp; | |
783 | } | |
784 | ||
785 | extern void __secpath_destroy(struct sec_path *sp); | |
786 | ||
787 | static inline void | |
788 | secpath_put(struct sec_path *sp) | |
789 | { | |
790 | if (sp && atomic_dec_and_test(&sp->refcnt)) | |
791 | __secpath_destroy(sp); | |
792 | } | |
793 | ||
794 | extern struct sec_path *secpath_dup(struct sec_path *src); | |
795 | ||
796 | static inline void | |
797 | secpath_reset(struct sk_buff *skb) | |
798 | { | |
799 | #ifdef CONFIG_XFRM | |
800 | secpath_put(skb->sp); | |
801 | skb->sp = NULL; | |
802 | #endif | |
803 | } | |
804 | ||
a1e59abf PM |
805 | static inline int |
806 | xfrm_addr_any(xfrm_address_t *addr, unsigned short family) | |
807 | { | |
808 | switch (family) { | |
809 | case AF_INET: | |
810 | return addr->a4 == 0; | |
811 | case AF_INET6: | |
812 | return ipv6_addr_any((struct in6_addr *)&addr->a6); | |
813 | } | |
814 | return 0; | |
815 | } | |
816 | ||
1da177e4 LT |
817 | static inline int |
818 | __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) | |
819 | { | |
820 | return (tmpl->saddr.a4 && | |
821 | tmpl->saddr.a4 != x->props.saddr.a4); | |
822 | } | |
823 | ||
824 | static inline int | |
825 | __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) | |
826 | { | |
827 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
828 | ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); | |
829 | } | |
830 | ||
831 | static inline int | |
832 | xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) | |
833 | { | |
834 | switch (family) { | |
835 | case AF_INET: | |
836 | return __xfrm4_state_addr_cmp(tmpl, x); | |
837 | case AF_INET6: | |
838 | return __xfrm6_state_addr_cmp(tmpl, x); | |
839 | } | |
840 | return !0; | |
841 | } | |
842 | ||
843 | #ifdef CONFIG_XFRM | |
844 | ||
845 | extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); | |
846 | ||
847 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
848 | { | |
849 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) | |
850 | return __xfrm_policy_check(sk, dir, skb, family); | |
4e81bb83 | 851 | |
2518c7c2 | 852 | return (!xfrm_policy_count[dir] && !skb->sp) || |
1da177e4 LT |
853 | (skb->dst->flags & DST_NOPOLICY) || |
854 | __xfrm_policy_check(sk, dir, skb, family); | |
855 | } | |
856 | ||
857 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
858 | { | |
859 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
860 | } | |
861 | ||
862 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
863 | { | |
864 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
865 | } | |
866 | ||
3e3850e9 | 867 | extern int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family); |
1da177e4 LT |
868 | extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
869 | ||
870 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
871 | { | |
2518c7c2 | 872 | return !xfrm_policy_count[XFRM_POLICY_OUT] || |
1da177e4 LT |
873 | (skb->dst->flags & DST_NOXFRM) || |
874 | __xfrm_route_forward(skb, family); | |
875 | } | |
876 | ||
877 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
878 | { | |
879 | return xfrm_route_forward(skb, AF_INET); | |
880 | } | |
881 | ||
882 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
883 | { | |
884 | return xfrm_route_forward(skb, AF_INET6); | |
885 | } | |
886 | ||
887 | extern int __xfrm_sk_clone_policy(struct sock *sk); | |
888 | ||
889 | static inline int xfrm_sk_clone_policy(struct sock *sk) | |
890 | { | |
891 | if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) | |
892 | return __xfrm_sk_clone_policy(sk); | |
893 | return 0; | |
894 | } | |
895 | ||
4666faab | 896 | extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
897 | |
898 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
899 | { | |
900 | if (unlikely(sk->sk_policy[0] != NULL)) { | |
901 | xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); | |
902 | sk->sk_policy[0] = NULL; | |
903 | } | |
904 | if (unlikely(sk->sk_policy[1] != NULL)) { | |
905 | xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); | |
906 | sk->sk_policy[1] = NULL; | |
907 | } | |
908 | } | |
909 | ||
910 | #else | |
911 | ||
912 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
913 | static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } | |
914 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } | |
915 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
916 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
917 | { | |
918 | return 1; | |
919 | } | |
920 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
921 | { | |
922 | return 1; | |
923 | } | |
924 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
925 | { | |
926 | return 1; | |
927 | } | |
928 | #endif | |
929 | ||
930 | static __inline__ | |
931 | xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) | |
932 | { | |
933 | switch (family){ | |
934 | case AF_INET: | |
935 | return (xfrm_address_t *)&fl->fl4_dst; | |
936 | case AF_INET6: | |
937 | return (xfrm_address_t *)&fl->fl6_dst; | |
938 | } | |
939 | return NULL; | |
940 | } | |
941 | ||
942 | static __inline__ | |
943 | xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) | |
944 | { | |
945 | switch (family){ | |
946 | case AF_INET: | |
947 | return (xfrm_address_t *)&fl->fl4_src; | |
948 | case AF_INET6: | |
949 | return (xfrm_address_t *)&fl->fl6_src; | |
950 | } | |
951 | return NULL; | |
952 | } | |
953 | ||
954 | static __inline__ int | |
955 | __xfrm4_state_addr_check(struct xfrm_state *x, | |
956 | xfrm_address_t *daddr, xfrm_address_t *saddr) | |
957 | { | |
958 | if (daddr->a4 == x->id.daddr.a4 && | |
959 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
960 | return 1; | |
961 | return 0; | |
962 | } | |
963 | ||
964 | static __inline__ int | |
965 | __xfrm6_state_addr_check(struct xfrm_state *x, | |
966 | xfrm_address_t *daddr, xfrm_address_t *saddr) | |
967 | { | |
968 | if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && | |
969 | (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| | |
970 | ipv6_addr_any((struct in6_addr *)saddr) || | |
971 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) | |
972 | return 1; | |
973 | return 0; | |
974 | } | |
975 | ||
976 | static __inline__ int | |
977 | xfrm_state_addr_check(struct xfrm_state *x, | |
978 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
979 | unsigned short family) | |
980 | { | |
981 | switch (family) { | |
982 | case AF_INET: | |
983 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
984 | case AF_INET6: | |
985 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
986 | } | |
987 | return 0; | |
988 | } | |
989 | ||
e53820de MN |
990 | static __inline__ int |
991 | xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, | |
992 | unsigned short family) | |
993 | { | |
994 | switch (family) { | |
995 | case AF_INET: | |
996 | return __xfrm4_state_addr_check(x, | |
997 | (xfrm_address_t *)&fl->fl4_dst, | |
998 | (xfrm_address_t *)&fl->fl4_src); | |
999 | case AF_INET6: | |
1000 | return __xfrm6_state_addr_check(x, | |
1001 | (xfrm_address_t *)&fl->fl6_dst, | |
1002 | (xfrm_address_t *)&fl->fl6_src); | |
1003 | } | |
1004 | return 0; | |
1005 | } | |
1006 | ||
1da177e4 LT |
1007 | static inline int xfrm_state_kern(struct xfrm_state *x) |
1008 | { | |
1009 | return atomic_read(&x->tunnel_users); | |
1010 | } | |
1011 | ||
5794708f MN |
1012 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1013 | { | |
dc00a525 MN |
1014 | return (!userproto || proto == userproto || |
1015 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
1016 | proto == IPPROTO_ESP || | |
1017 | proto == IPPROTO_COMP))); | |
5794708f MN |
1018 | } |
1019 | ||
1da177e4 LT |
1020 | /* |
1021 | * xfrm algorithm information | |
1022 | */ | |
1023 | struct xfrm_algo_auth_info { | |
1024 | u16 icv_truncbits; | |
1025 | u16 icv_fullbits; | |
1026 | }; | |
1027 | ||
1028 | struct xfrm_algo_encr_info { | |
1029 | u16 blockbits; | |
1030 | u16 defkeybits; | |
1031 | }; | |
1032 | ||
1033 | struct xfrm_algo_comp_info { | |
1034 | u16 threshold; | |
1035 | }; | |
1036 | ||
1037 | struct xfrm_algo_desc { | |
1038 | char *name; | |
04ff1260 | 1039 | char *compat; |
1da177e4 LT |
1040 | u8 available:1; |
1041 | union { | |
1042 | struct xfrm_algo_auth_info auth; | |
1043 | struct xfrm_algo_encr_info encr; | |
1044 | struct xfrm_algo_comp_info comp; | |
1045 | } uinfo; | |
1046 | struct sadb_alg desc; | |
1047 | }; | |
1048 | ||
1049 | /* XFRM tunnel handlers. */ | |
1050 | struct xfrm_tunnel { | |
1051 | int (*handler)(struct sk_buff *skb); | |
d2acc347 HX |
1052 | int (*err_handler)(struct sk_buff *skb, __u32 info); |
1053 | ||
1054 | struct xfrm_tunnel *next; | |
1055 | int priority; | |
1da177e4 LT |
1056 | }; |
1057 | ||
1058 | struct xfrm6_tunnel { | |
d2acc347 HX |
1059 | int (*handler)(struct sk_buff *skb); |
1060 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
04ce6909 | 1061 | int type, int code, int offset, __be32 info); |
d2acc347 HX |
1062 | struct xfrm6_tunnel *next; |
1063 | int priority; | |
1da177e4 LT |
1064 | }; |
1065 | ||
1066 | extern void xfrm_init(void); | |
1067 | extern void xfrm4_init(void); | |
1068 | extern void xfrm6_init(void); | |
1069 | extern void xfrm6_fini(void); | |
1070 | extern void xfrm_state_init(void); | |
1071 | extern void xfrm4_state_init(void); | |
1da177e4 LT |
1072 | extern void xfrm6_state_init(void); |
1073 | extern void xfrm6_state_fini(void); | |
1074 | ||
1075 | extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *); | |
1076 | extern struct xfrm_state *xfrm_state_alloc(void); | |
1077 | extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, | |
1078 | struct flowi *fl, struct xfrm_tmpl *tmpl, | |
1079 | struct xfrm_policy *pol, int *err, | |
1080 | unsigned short family); | |
628529b6 JHS |
1081 | extern struct xfrm_state * xfrm_stateonly_find(xfrm_address_t *daddr, |
1082 | xfrm_address_t *saddr, | |
1083 | unsigned short family, | |
1084 | u8 mode, u8 proto, u32 reqid); | |
1da177e4 LT |
1085 | extern int xfrm_state_check_expire(struct xfrm_state *x); |
1086 | extern void xfrm_state_insert(struct xfrm_state *x); | |
1087 | extern int xfrm_state_add(struct xfrm_state *x); | |
1088 | extern int xfrm_state_update(struct xfrm_state *x); | |
a94cfd19 | 1089 | extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family); |
eb2971b6 | 1090 | extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); |
41a49cc3 MN |
1091 | #ifdef CONFIG_XFRM_SUB_POLICY |
1092 | extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
1093 | int n, unsigned short family); | |
1094 | extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1095 | int n, unsigned short family); | |
1096 | #else | |
1097 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
1098 | int n, unsigned short family) | |
1099 | { | |
1100 | return -ENOSYS; | |
1101 | } | |
1102 | ||
1103 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1104 | int n, unsigned short family) | |
1105 | { | |
1106 | return -ENOSYS; | |
1107 | } | |
1108 | #endif | |
af11e316 JHS |
1109 | |
1110 | struct xfrmk_sadinfo { | |
1111 | u32 sadhcnt; /* current hash bkts */ | |
1112 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1113 | u32 sadcnt; /* current running count */ | |
1114 | }; | |
1115 | ||
5a6d3416 JHS |
1116 | struct xfrmk_spdinfo { |
1117 | u32 incnt; | |
1118 | u32 outcnt; | |
1119 | u32 fwdcnt; | |
1120 | u32 inscnt; | |
1121 | u32 outscnt; | |
1122 | u32 fwdscnt; | |
1123 | u32 spdhcnt; | |
1124 | u32 spdhmcnt; | |
1125 | }; | |
1126 | ||
1da177e4 | 1127 | extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq); |
26b15dad | 1128 | extern int xfrm_state_delete(struct xfrm_state *x); |
4aa2e62c | 1129 | extern int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info); |
af11e316 | 1130 | extern void xfrm_sad_getinfo(struct xfrmk_sadinfo *si); |
5a6d3416 | 1131 | extern void xfrm_spd_getinfo(struct xfrmk_spdinfo *si); |
a252cc23 | 1132 | extern int xfrm_replay_check(struct xfrm_state *x, __be32 seq); |
61f4627b | 1133 | extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); |
f8cd5488 | 1134 | extern void xfrm_replay_notify(struct xfrm_state *x, int event); |
1da177e4 | 1135 | extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); |
72cb6962 | 1136 | extern int xfrm_init_state(struct xfrm_state *x); |
227620e2 | 1137 | extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); |
716062fd HX |
1138 | extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, |
1139 | int encap_type); | |
1bf06cd2 | 1140 | extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); |
c6581a45 | 1141 | extern int xfrm_output_resume(struct sk_buff *skb, int err); |
406ef77c | 1142 | extern int xfrm_output(struct sk_buff *skb); |
36cf9acf | 1143 | extern int xfrm4_extract_header(struct sk_buff *skb); |
227620e2 | 1144 | extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
c4541b41 HX |
1145 | extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
1146 | int encap_type); | |
716062fd | 1147 | extern int xfrm4_transport_finish(struct sk_buff *skb, int async); |
1da177e4 | 1148 | extern int xfrm4_rcv(struct sk_buff *skb); |
c4541b41 HX |
1149 | |
1150 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1151 | { | |
1152 | return xfrm4_rcv_encap(skb, nexthdr, spi, 0); | |
1153 | } | |
1154 | ||
36cf9acf HX |
1155 | extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1156 | extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1da177e4 | 1157 | extern int xfrm4_output(struct sk_buff *skb); |
c0d56408 KM |
1158 | extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1159 | extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
36cf9acf | 1160 | extern int xfrm6_extract_header(struct sk_buff *skb); |
227620e2 | 1161 | extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
33b5ecb8 | 1162 | extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); |
716062fd | 1163 | extern int xfrm6_transport_finish(struct sk_buff *skb, int async); |
e5bbef20 | 1164 | extern int xfrm6_rcv(struct sk_buff *skb); |
fbd9a5b4 MN |
1165 | extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, |
1166 | xfrm_address_t *saddr, u8 proto); | |
73d605d1 KM |
1167 | extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
1168 | extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); | |
8c689a6e | 1169 | extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); |
1da177e4 | 1170 | extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); |
8c689a6e | 1171 | extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); |
36cf9acf HX |
1172 | extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1173 | extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1da177e4 | 1174 | extern int xfrm6_output(struct sk_buff *skb); |
aee5adb4 MN |
1175 | extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
1176 | u8 **prevhdr); | |
1da177e4 LT |
1177 | |
1178 | #ifdef CONFIG_XFRM | |
067b207b | 1179 | extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1da177e4 | 1180 | extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); |
1da177e4 LT |
1181 | #else |
1182 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1183 | { | |
1184 | return -ENOPROTOOPT; | |
1185 | } | |
1186 | ||
067b207b | 1187 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
1188 | { |
1189 | /* should not happen */ | |
1190 | kfree_skb(skb); | |
1191 | return 0; | |
1192 | } | |
1da177e4 LT |
1193 | #endif |
1194 | ||
dd0fc66f | 1195 | struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp); |
4e81bb83 | 1196 | extern int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*), void *); |
1da177e4 | 1197 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
4e81bb83 MN |
1198 | struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir, |
1199 | struct xfrm_selector *sel, | |
ef41aaa0 EP |
1200 | struct xfrm_sec_ctx *ctx, int delete, |
1201 | int *err); | |
1202 | struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete, int *err); | |
4aa2e62c | 1203 | int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); |
1da177e4 | 1204 | u32 xfrm_get_acqseq(void); |
658b219e | 1205 | extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
161a09e7 JL |
1206 | struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto, |
1207 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
1da177e4 | 1208 | int create, unsigned short family); |
4aa2e62c | 1209 | extern int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); |
1da177e4 | 1210 | extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
5b368e61 VY |
1211 | extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, |
1212 | struct flowi *fl, int family, int strict); | |
1da177e4 | 1213 | |
80c9abaa SS |
1214 | #ifdef CONFIG_XFRM_MIGRATE |
1215 | extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1216 | struct xfrm_migrate *m, int num_bundles); | |
1217 | extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); | |
1218 | extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, | |
1219 | struct xfrm_migrate *m); | |
1220 | extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1221 | struct xfrm_migrate *m, int num_bundles); | |
1222 | #endif | |
1223 | ||
1da177e4 | 1224 | extern wait_queue_head_t km_waitq; |
5d36b180 | 1225 | extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
6c5c8ca7 | 1226 | extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); |
97a64b45 | 1227 | extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
1da177e4 LT |
1228 | |
1229 | extern void xfrm_input_init(void); | |
6067b2ba | 1230 | extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); |
1da177e4 LT |
1231 | |
1232 | extern void xfrm_probe_algs(void); | |
1233 | extern int xfrm_count_auth_supported(void); | |
1234 | extern int xfrm_count_enc_supported(void); | |
1235 | extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1236 | extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1237 | extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1238 | extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1239 | extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1240 | extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); | |
1241 | extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); | |
1242 | extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); | |
1243 | ||
07d4ee58 | 1244 | struct hash_desc; |
9409f38a | 1245 | struct scatterlist; |
07d4ee58 HX |
1246 | typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, |
1247 | unsigned int); | |
1da177e4 | 1248 | |
07d4ee58 HX |
1249 | extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, |
1250 | int offset, int len, icv_update_fn_t icv_update); | |
1da177e4 LT |
1251 | |
1252 | static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, | |
1253 | int family) | |
1254 | { | |
1255 | switch (family) { | |
1256 | default: | |
1257 | case AF_INET: | |
8c689a6e | 1258 | return (__force __u32)a->a4 - (__force __u32)b->a4; |
1da177e4 LT |
1259 | case AF_INET6: |
1260 | return ipv6_addr_cmp((struct in6_addr *)a, | |
1261 | (struct in6_addr *)b); | |
1262 | } | |
1263 | } | |
1264 | ||
77d8d7a6 HX |
1265 | static inline int xfrm_policy_id2dir(u32 index) |
1266 | { | |
1267 | return index & 7; | |
1268 | } | |
1269 | ||
f8cd5488 JHS |
1270 | static inline int xfrm_aevent_is_on(void) |
1271 | { | |
be33690d PM |
1272 | struct sock *nlsk; |
1273 | int ret = 0; | |
1274 | ||
1275 | rcu_read_lock(); | |
1276 | nlsk = rcu_dereference(xfrm_nl); | |
1277 | if (nlsk) | |
1278 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1279 | rcu_read_unlock(); | |
1280 | return ret; | |
f8cd5488 JHS |
1281 | } |
1282 | ||
0f99be0d ED |
1283 | static inline int xfrm_alg_len(struct xfrm_algo *alg) |
1284 | { | |
1285 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1286 | } | |
1287 | ||
80c9abaa SS |
1288 | #ifdef CONFIG_XFRM_MIGRATE |
1289 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) | |
1290 | { | |
0f99be0d | 1291 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
80c9abaa SS |
1292 | } |
1293 | ||
1294 | static inline void xfrm_states_put(struct xfrm_state **states, int n) | |
1295 | { | |
1296 | int i; | |
1297 | for (i = 0; i < n; i++) | |
1298 | xfrm_state_put(*(states + i)); | |
1299 | } | |
1300 | ||
1301 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1302 | { | |
1303 | int i; | |
1304 | for (i = 0; i < n; i++) | |
1305 | xfrm_state_delete(*(states + i)); | |
1306 | } | |
1307 | #endif | |
f8cd5488 | 1308 | |
1da177e4 | 1309 | #endif /* _NET_XFRM_H */ |