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1da177e4 LT |
1 | #ifndef _NET_XFRM_H |
2 | #define _NET_XFRM_H | |
3 | ||
aabc9761 | 4 | #include <linux/compiler.h> |
14c85021 | 5 | #include <linux/in.h> |
1da177e4 LT |
6 | #include <linux/xfrm.h> |
7 | #include <linux/spinlock.h> | |
8 | #include <linux/list.h> | |
9 | #include <linux/skbuff.h> | |
14c85021 | 10 | #include <linux/socket.h> |
1da177e4 | 11 | #include <linux/pfkeyv2.h> |
5794708f | 12 | #include <linux/ipsec.h> |
1da177e4 | 13 | #include <linux/in6.h> |
4a3e2f71 | 14 | #include <linux/mutex.h> |
1da177e4 LT |
15 | |
16 | #include <net/sock.h> | |
17 | #include <net/dst.h> | |
18 | #include <net/route.h> | |
19 | #include <net/ipv6.h> | |
20 | #include <net/ip6_fib.h> | |
21 | ||
22 | #define XFRM_ALIGN8(len) (((len) + 7) & ~7) | |
b59f45d0 HX |
23 | #define MODULE_ALIAS_XFRM_MODE(family, encap) \ |
24 | MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) | |
1da177e4 | 25 | |
f8cd5488 JHS |
26 | extern struct sock *xfrm_nl; |
27 | extern u32 sysctl_xfrm_aevent_etime; | |
28 | extern u32 sysctl_xfrm_aevent_rseqth; | |
29 | ||
4a3e2f71 | 30 | extern struct mutex xfrm_cfg_mutex; |
1da177e4 LT |
31 | |
32 | /* Organization of SPD aka "XFRM rules" | |
33 | ------------------------------------ | |
34 | ||
35 | Basic objects: | |
36 | - policy rule, struct xfrm_policy (=SPD entry) | |
37 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) | |
38 | - instance of a transformer, struct xfrm_state (=SA) | |
39 | - template to clone xfrm_state, struct xfrm_tmpl | |
40 | ||
41 | SPD is plain linear list of xfrm_policy rules, ordered by priority. | |
42 | (To be compatible with existing pfkeyv2 implementations, | |
43 | many rules with priority of 0x7fffffff are allowed to exist and | |
44 | such rules are ordered in an unpredictable way, thanks to bsd folks.) | |
45 | ||
46 | Lookup is plain linear search until the first match with selector. | |
47 | ||
48 | If "action" is "block", then we prohibit the flow, otherwise: | |
49 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, | |
50 | policy entry has list of up to XFRM_MAX_DEPTH transformations, | |
51 | described by templates xfrm_tmpl. Each template is resolved | |
52 | to a complete xfrm_state (see below) and we pack bundle of transformations | |
53 | to a dst_entry returned to requestor. | |
54 | ||
55 | dst -. xfrm .-> xfrm_state #1 | |
56 | |---. child .-> dst -. xfrm .-> xfrm_state #2 | |
57 | |---. child .-> dst -. xfrm .-> xfrm_state #3 | |
58 | |---. child .-> NULL | |
59 | ||
60 | Bundles are cached at xrfm_policy struct (field ->bundles). | |
61 | ||
62 | ||
63 | Resolution of xrfm_tmpl | |
64 | ----------------------- | |
65 | Template contains: | |
66 | 1. ->mode Mode: transport or tunnel | |
67 | 2. ->id.proto Protocol: AH/ESP/IPCOMP | |
68 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. | |
69 | Q: allow to resolve security gateway? | |
70 | 4. ->id.spi If not zero, static SPI. | |
71 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. | |
72 | 6. ->algos List of allowed algos. Plain bitmask now. | |
73 | Q: ealgos, aalgos, calgos. What a mess... | |
74 | 7. ->share Sharing mode. | |
75 | Q: how to implement private sharing mode? To add struct sock* to | |
76 | flow id? | |
77 | ||
78 | Having this template we search through SAD searching for entries | |
79 | with appropriate mode/proto/algo, permitted by selector. | |
80 | If no appropriate entry found, it is requested from key manager. | |
81 | ||
82 | PROBLEMS: | |
83 | Q: How to find all the bundles referring to a physical path for | |
84 | PMTU discovery? Seems, dst should contain list of all parents... | |
85 | and enter to infinite locking hierarchy disaster. | |
86 | No! It is easier, we will not search for them, let them find us. | |
87 | We add genid to each dst plus pointer to genid of raw IP route, | |
88 | pmtu disc will update pmtu on raw IP route and increase its genid. | |
89 | dst_check() will see this for top level and trigger resyncing | |
90 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. | |
91 | */ | |
92 | ||
93 | /* Full description of state of transformer. */ | |
94 | struct xfrm_state | |
95 | { | |
96 | /* Note: bydst is re-used during gc */ | |
97 | struct list_head bydst; | |
6c44e6b7 | 98 | struct list_head bysrc; |
1da177e4 LT |
99 | struct list_head byspi; |
100 | ||
101 | atomic_t refcnt; | |
102 | spinlock_t lock; | |
103 | ||
104 | struct xfrm_id id; | |
105 | struct xfrm_selector sel; | |
106 | ||
107 | /* Key manger bits */ | |
108 | struct { | |
109 | u8 state; | |
110 | u8 dying; | |
111 | u32 seq; | |
112 | } km; | |
113 | ||
114 | /* Parameters of this state. */ | |
115 | struct { | |
116 | u32 reqid; | |
117 | u8 mode; | |
118 | u8 replay_window; | |
119 | u8 aalgo, ealgo, calgo; | |
120 | u8 flags; | |
121 | u16 family; | |
122 | xfrm_address_t saddr; | |
123 | int header_len; | |
124 | int trailer_len; | |
125 | } props; | |
126 | ||
127 | struct xfrm_lifetime_cfg lft; | |
128 | ||
129 | /* Data for transformer */ | |
130 | struct xfrm_algo *aalg; | |
131 | struct xfrm_algo *ealg; | |
132 | struct xfrm_algo *calg; | |
133 | ||
134 | /* Data for encapsulator */ | |
135 | struct xfrm_encap_tmpl *encap; | |
136 | ||
060f02a3 NT |
137 | /* Data for care-of address */ |
138 | xfrm_address_t *coaddr; | |
139 | ||
1da177e4 LT |
140 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
141 | struct xfrm_state *tunnel; | |
142 | ||
143 | /* If a tunnel, number of users + 1 */ | |
144 | atomic_t tunnel_users; | |
145 | ||
146 | /* State for replay detection */ | |
147 | struct xfrm_replay_state replay; | |
148 | ||
f8cd5488 JHS |
149 | /* Replay detection state at the time we sent the last notification */ |
150 | struct xfrm_replay_state preplay; | |
151 | ||
2717096a JHS |
152 | /* internal flag that only holds state for delayed aevent at the |
153 | * moment | |
154 | */ | |
155 | u32 xflags; | |
156 | ||
f8cd5488 JHS |
157 | /* Replay detection notification settings */ |
158 | u32 replay_maxage; | |
159 | u32 replay_maxdiff; | |
160 | ||
161 | /* Replay detection notification timer */ | |
162 | struct timer_list rtimer; | |
163 | ||
1da177e4 LT |
164 | /* Statistics */ |
165 | struct xfrm_stats stats; | |
166 | ||
167 | struct xfrm_lifetime_cur curlft; | |
168 | struct timer_list timer; | |
169 | ||
9afaca05 MN |
170 | /* Last used time */ |
171 | u64 lastused; | |
172 | ||
1da177e4 LT |
173 | /* Reference to data common to all the instances of this |
174 | * transformer. */ | |
175 | struct xfrm_type *type; | |
b59f45d0 | 176 | struct xfrm_mode *mode; |
1da177e4 | 177 | |
df71837d TJ |
178 | /* Security context */ |
179 | struct xfrm_sec_ctx *security; | |
180 | ||
1da177e4 LT |
181 | /* Private data of this transformer, format is opaque, |
182 | * interpreted by xfrm_type methods. */ | |
183 | void *data; | |
184 | }; | |
185 | ||
2717096a JHS |
186 | /* xflags - make enum if more show up */ |
187 | #define XFRM_TIME_DEFER 1 | |
188 | ||
1da177e4 LT |
189 | enum { |
190 | XFRM_STATE_VOID, | |
191 | XFRM_STATE_ACQ, | |
192 | XFRM_STATE_VALID, | |
193 | XFRM_STATE_ERROR, | |
194 | XFRM_STATE_EXPIRED, | |
195 | XFRM_STATE_DEAD | |
196 | }; | |
197 | ||
26b15dad JHS |
198 | /* callback structure passed from either netlink or pfkey */ |
199 | struct km_event | |
200 | { | |
bf08867f HX |
201 | union { |
202 | u32 hard; | |
203 | u32 proto; | |
204 | u32 byid; | |
f8cd5488 | 205 | u32 aevent; |
bf08867f HX |
206 | } data; |
207 | ||
26b15dad JHS |
208 | u32 seq; |
209 | u32 pid; | |
210 | u32 event; | |
211 | }; | |
212 | ||
1da177e4 LT |
213 | struct xfrm_type; |
214 | struct xfrm_dst; | |
215 | struct xfrm_policy_afinfo { | |
216 | unsigned short family; | |
73654d61 | 217 | struct xfrm_type *type_map[IPPROTO_MAX]; |
b59f45d0 | 218 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; |
1da177e4 LT |
219 | struct dst_ops *dst_ops; |
220 | void (*garbage_collect)(void); | |
221 | int (*dst_lookup)(struct xfrm_dst **dst, struct flowi *fl); | |
222 | struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); | |
223 | int (*bundle_create)(struct xfrm_policy *policy, | |
224 | struct xfrm_state **xfrm, | |
225 | int nx, | |
226 | struct flowi *fl, | |
227 | struct dst_entry **dst_p); | |
228 | void (*decode_session)(struct sk_buff *skb, | |
229 | struct flowi *fl); | |
230 | }; | |
231 | ||
232 | extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); | |
233 | extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); | |
26b15dad JHS |
234 | extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); |
235 | extern void km_state_notify(struct xfrm_state *x, struct km_event *c); | |
1da177e4 LT |
236 | #define XFRM_ACQ_EXPIRES 30 |
237 | ||
238 | struct xfrm_tmpl; | |
980ebd25 | 239 | extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
53bc6b4d JHS |
240 | extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); |
241 | extern int __xfrm_state_delete(struct xfrm_state *x); | |
242 | ||
1da177e4 LT |
243 | struct xfrm_state_afinfo { |
244 | unsigned short family; | |
1da177e4 | 245 | struct list_head *state_bydst; |
6c44e6b7 | 246 | struct list_head *state_bysrc; |
1da177e4 | 247 | struct list_head *state_byspi; |
d094cd83 | 248 | int (*init_flags)(struct xfrm_state *x); |
1da177e4 LT |
249 | void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, |
250 | struct xfrm_tmpl *tmpl, | |
251 | xfrm_address_t *daddr, xfrm_address_t *saddr); | |
252 | struct xfrm_state *(*state_lookup)(xfrm_address_t *daddr, u32 spi, u8 proto); | |
eb2971b6 | 253 | struct xfrm_state *(*state_lookup_byaddr)(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto); |
1da177e4 LT |
254 | struct xfrm_state *(*find_acq)(u8 mode, u32 reqid, u8 proto, |
255 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
256 | int create); | |
257 | }; | |
258 | ||
259 | extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); | |
260 | extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
261 | ||
262 | extern void xfrm_state_delete_tunnel(struct xfrm_state *x); | |
263 | ||
1da177e4 LT |
264 | struct xfrm_type |
265 | { | |
266 | char *description; | |
267 | struct module *owner; | |
268 | __u8 proto; | |
1b5c2299 MN |
269 | __u8 flags; |
270 | #define XFRM_TYPE_NON_FRAGMENT 1 | |
1da177e4 | 271 | |
72cb6962 | 272 | int (*init_state)(struct xfrm_state *x); |
1da177e4 | 273 | void (*destructor)(struct xfrm_state *); |
e695633e | 274 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 275 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
df0ba92a | 276 | int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); |
aee5adb4 | 277 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
99505a84 MN |
278 | xfrm_address_t *(*local_addr)(struct xfrm_state *, xfrm_address_t *); |
279 | xfrm_address_t *(*remote_addr)(struct xfrm_state *, xfrm_address_t *); | |
1da177e4 LT |
280 | /* Estimate maximal size of result of transformation of a dgram */ |
281 | u32 (*get_max_size)(struct xfrm_state *, int size); | |
282 | }; | |
283 | ||
1da177e4 LT |
284 | extern int xfrm_register_type(struct xfrm_type *type, unsigned short family); |
285 | extern int xfrm_unregister_type(struct xfrm_type *type, unsigned short family); | |
286 | extern struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family); | |
287 | extern void xfrm_put_type(struct xfrm_type *type); | |
288 | ||
b59f45d0 HX |
289 | struct xfrm_mode { |
290 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); | |
291 | int (*output)(struct sk_buff *skb); | |
292 | ||
293 | struct module *owner; | |
294 | unsigned int encap; | |
295 | }; | |
296 | ||
297 | extern int xfrm_register_mode(struct xfrm_mode *mode, int family); | |
298 | extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); | |
299 | extern struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family); | |
300 | extern void xfrm_put_mode(struct xfrm_mode *mode); | |
301 | ||
1da177e4 LT |
302 | struct xfrm_tmpl |
303 | { | |
304 | /* id in template is interpreted as: | |
305 | * daddr - destination of tunnel, may be zero for transport mode. | |
306 | * spi - zero to acquire spi. Not zero if spi is static, then | |
307 | * daddr must be fixed too. | |
308 | * proto - AH/ESP/IPCOMP | |
309 | */ | |
310 | struct xfrm_id id; | |
311 | ||
312 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
313 | xfrm_address_t saddr; | |
314 | ||
315 | __u32 reqid; | |
316 | ||
7e49e6de | 317 | /* Mode: transport, tunnel etc. */ |
1da177e4 LT |
318 | __u8 mode; |
319 | ||
320 | /* Sharing mode: unique, this session only, this user only etc. */ | |
321 | __u8 share; | |
322 | ||
323 | /* May skip this transfomration if no SA is found */ | |
324 | __u8 optional; | |
325 | ||
326 | /* Bit mask of algos allowed for acquisition */ | |
327 | __u32 aalgos; | |
328 | __u32 ealgos; | |
329 | __u32 calgos; | |
330 | }; | |
331 | ||
622dc828 | 332 | #define XFRM_MAX_DEPTH 6 |
1da177e4 LT |
333 | |
334 | struct xfrm_policy | |
335 | { | |
336 | struct xfrm_policy *next; | |
337 | struct list_head list; | |
338 | ||
339 | /* This lock only affects elements except for entry. */ | |
340 | rwlock_t lock; | |
341 | atomic_t refcnt; | |
342 | struct timer_list timer; | |
343 | ||
4e81bb83 | 344 | u8 type; |
1da177e4 LT |
345 | u32 priority; |
346 | u32 index; | |
347 | struct xfrm_selector selector; | |
348 | struct xfrm_lifetime_cfg lft; | |
349 | struct xfrm_lifetime_cur curlft; | |
350 | struct dst_entry *bundles; | |
351 | __u16 family; | |
352 | __u8 action; | |
353 | __u8 flags; | |
354 | __u8 dead; | |
355 | __u8 xfrm_nr; | |
df71837d | 356 | struct xfrm_sec_ctx *security; |
1da177e4 LT |
357 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
358 | }; | |
359 | ||
f8cd5488 JHS |
360 | #define XFRM_KM_TIMEOUT 30 |
361 | /* which seqno */ | |
362 | #define XFRM_REPLAY_SEQ 1 | |
363 | #define XFRM_REPLAY_OSEQ 2 | |
364 | #define XFRM_REPLAY_SEQ_MASK 3 | |
365 | /* what happened */ | |
366 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
367 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
368 | ||
369 | /* default aevent timeout in units of 100ms */ | |
370 | #define XFRM_AE_ETIME 10 | |
371 | /* Async Event timer multiplier */ | |
372 | #define XFRM_AE_ETH_M 10 | |
373 | /* default seq threshold size */ | |
374 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 LT |
375 | |
376 | struct xfrm_mgr | |
377 | { | |
378 | struct list_head list; | |
379 | char *id; | |
26b15dad | 380 | int (*notify)(struct xfrm_state *x, struct km_event *c); |
1da177e4 | 381 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); |
cb969f07 | 382 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
1da177e4 | 383 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport); |
26b15dad | 384 | int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); |
97a64b45 | 385 | int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
1da177e4 LT |
386 | }; |
387 | ||
388 | extern int xfrm_register_km(struct xfrm_mgr *km); | |
389 | extern int xfrm_unregister_km(struct xfrm_mgr *km); | |
390 | ||
391 | ||
392 | extern struct xfrm_policy *xfrm_policy_list[XFRM_POLICY_MAX*2]; | |
4e81bb83 MN |
393 | #ifdef CONFIG_XFRM_SUB_POLICY |
394 | extern struct xfrm_policy *xfrm_policy_list_sub[XFRM_POLICY_MAX*2]; | |
395 | ||
396 | static inline int xfrm_policy_lists_empty(int dir) | |
397 | { | |
398 | return (!xfrm_policy_list[dir] && !xfrm_policy_list_sub[dir]); | |
399 | } | |
400 | #else | |
401 | static inline int xfrm_policy_lists_empty(int dir) | |
402 | { | |
403 | return (!xfrm_policy_list[dir]); | |
404 | } | |
405 | #endif | |
1da177e4 LT |
406 | |
407 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) | |
408 | { | |
409 | if (likely(policy != NULL)) | |
410 | atomic_inc(&policy->refcnt); | |
411 | } | |
412 | ||
413 | extern void __xfrm_policy_destroy(struct xfrm_policy *policy); | |
414 | ||
415 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
416 | { | |
417 | if (atomic_dec_and_test(&policy->refcnt)) | |
418 | __xfrm_policy_destroy(policy); | |
419 | } | |
420 | ||
4e81bb83 MN |
421 | #ifdef CONFIG_XFRM_SUB_POLICY |
422 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) | |
423 | { | |
424 | int i; | |
425 | for (i = npols - 1; i >= 0; --i) | |
426 | xfrm_pol_put(pols[i]); | |
427 | } | |
428 | #else | |
429 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) | |
430 | { | |
431 | xfrm_pol_put(pols[0]); | |
432 | } | |
433 | #endif | |
434 | ||
1da177e4 LT |
435 | #define XFRM_DST_HSIZE 1024 |
436 | ||
437 | static __inline__ | |
438 | unsigned __xfrm4_dst_hash(xfrm_address_t *addr) | |
439 | { | |
440 | unsigned h; | |
441 | h = ntohl(addr->a4); | |
442 | h = (h ^ (h>>16)) % XFRM_DST_HSIZE; | |
443 | return h; | |
444 | } | |
445 | ||
446 | static __inline__ | |
447 | unsigned __xfrm6_dst_hash(xfrm_address_t *addr) | |
448 | { | |
449 | unsigned h; | |
450 | h = ntohl(addr->a6[2]^addr->a6[3]); | |
451 | h = (h ^ (h>>16)) % XFRM_DST_HSIZE; | |
452 | return h; | |
453 | } | |
454 | ||
455 | static __inline__ | |
456 | unsigned xfrm_dst_hash(xfrm_address_t *addr, unsigned short family) | |
457 | { | |
458 | switch (family) { | |
459 | case AF_INET: | |
460 | return __xfrm4_dst_hash(addr); | |
461 | case AF_INET6: | |
462 | return __xfrm6_dst_hash(addr); | |
463 | } | |
464 | return 0; | |
465 | } | |
466 | ||
6c44e6b7 MN |
467 | static __inline__ |
468 | unsigned __xfrm4_src_hash(xfrm_address_t *addr) | |
469 | { | |
470 | return __xfrm4_dst_hash(addr); | |
471 | } | |
472 | ||
473 | static __inline__ | |
474 | unsigned __xfrm6_src_hash(xfrm_address_t *addr) | |
475 | { | |
476 | return __xfrm6_dst_hash(addr); | |
477 | } | |
478 | ||
479 | static __inline__ | |
480 | unsigned xfrm_src_hash(xfrm_address_t *addr, unsigned short family) | |
481 | { | |
482 | switch (family) { | |
483 | case AF_INET: | |
484 | return __xfrm4_src_hash(addr); | |
485 | case AF_INET6: | |
486 | return __xfrm6_src_hash(addr); | |
487 | } | |
488 | return 0; | |
489 | } | |
490 | ||
1da177e4 LT |
491 | static __inline__ |
492 | unsigned __xfrm4_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto) | |
493 | { | |
494 | unsigned h; | |
495 | h = ntohl(addr->a4^spi^proto); | |
496 | h = (h ^ (h>>10) ^ (h>>20)) % XFRM_DST_HSIZE; | |
497 | return h; | |
498 | } | |
499 | ||
500 | static __inline__ | |
501 | unsigned __xfrm6_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto) | |
502 | { | |
503 | unsigned h; | |
504 | h = ntohl(addr->a6[2]^addr->a6[3]^spi^proto); | |
505 | h = (h ^ (h>>10) ^ (h>>20)) % XFRM_DST_HSIZE; | |
506 | return h; | |
507 | } | |
508 | ||
509 | static __inline__ | |
510 | unsigned xfrm_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto, unsigned short family) | |
511 | { | |
512 | switch (family) { | |
513 | case AF_INET: | |
514 | return __xfrm4_spi_hash(addr, spi, proto); | |
515 | case AF_INET6: | |
516 | return __xfrm6_spi_hash(addr, spi, proto); | |
517 | } | |
518 | return 0; /*XXX*/ | |
519 | } | |
520 | ||
521 | extern void __xfrm_state_destroy(struct xfrm_state *); | |
522 | ||
21380b81 HX |
523 | static inline void __xfrm_state_put(struct xfrm_state *x) |
524 | { | |
525 | atomic_dec(&x->refcnt); | |
526 | } | |
527 | ||
1da177e4 LT |
528 | static inline void xfrm_state_put(struct xfrm_state *x) |
529 | { | |
530 | if (atomic_dec_and_test(&x->refcnt)) | |
531 | __xfrm_state_destroy(x); | |
532 | } | |
533 | ||
534 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
535 | { | |
536 | atomic_inc(&x->refcnt); | |
537 | } | |
538 | ||
539 | static __inline__ int addr_match(void *token1, void *token2, int prefixlen) | |
540 | { | |
541 | __u32 *a1 = token1; | |
542 | __u32 *a2 = token2; | |
543 | int pdw; | |
544 | int pbi; | |
545 | ||
546 | pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ | |
547 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ | |
548 | ||
549 | if (pdw) | |
550 | if (memcmp(a1, a2, pdw << 2)) | |
551 | return 0; | |
552 | ||
553 | if (pbi) { | |
554 | __u32 mask; | |
555 | ||
556 | mask = htonl((0xffffffff) << (32 - pbi)); | |
557 | ||
558 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
559 | return 0; | |
560 | } | |
561 | ||
562 | return 1; | |
563 | } | |
564 | ||
565 | static __inline__ | |
566 | u16 xfrm_flowi_sport(struct flowi *fl) | |
567 | { | |
568 | u16 port; | |
569 | switch(fl->proto) { | |
570 | case IPPROTO_TCP: | |
571 | case IPPROTO_UDP: | |
572 | case IPPROTO_SCTP: | |
573 | port = fl->fl_ip_sport; | |
574 | break; | |
575 | case IPPROTO_ICMP: | |
576 | case IPPROTO_ICMPV6: | |
577 | port = htons(fl->fl_icmp_type); | |
578 | break; | |
2ce4272a MN |
579 | #ifdef CONFIG_IPV6_MIP6 |
580 | case IPPROTO_MH: | |
581 | port = htons(fl->fl_mh_type); | |
582 | break; | |
583 | #endif | |
1da177e4 LT |
584 | default: |
585 | port = 0; /*XXX*/ | |
586 | } | |
587 | return port; | |
588 | } | |
589 | ||
590 | static __inline__ | |
591 | u16 xfrm_flowi_dport(struct flowi *fl) | |
592 | { | |
593 | u16 port; | |
594 | switch(fl->proto) { | |
595 | case IPPROTO_TCP: | |
596 | case IPPROTO_UDP: | |
597 | case IPPROTO_SCTP: | |
598 | port = fl->fl_ip_dport; | |
599 | break; | |
600 | case IPPROTO_ICMP: | |
601 | case IPPROTO_ICMPV6: | |
602 | port = htons(fl->fl_icmp_code); | |
603 | break; | |
604 | default: | |
605 | port = 0; /*XXX*/ | |
606 | } | |
607 | return port; | |
608 | } | |
609 | ||
610 | static inline int | |
611 | __xfrm4_selector_match(struct xfrm_selector *sel, struct flowi *fl) | |
612 | { | |
613 | return addr_match(&fl->fl4_dst, &sel->daddr, sel->prefixlen_d) && | |
614 | addr_match(&fl->fl4_src, &sel->saddr, sel->prefixlen_s) && | |
615 | !((xfrm_flowi_dport(fl) ^ sel->dport) & sel->dport_mask) && | |
616 | !((xfrm_flowi_sport(fl) ^ sel->sport) & sel->sport_mask) && | |
617 | (fl->proto == sel->proto || !sel->proto) && | |
618 | (fl->oif == sel->ifindex || !sel->ifindex); | |
619 | } | |
620 | ||
621 | static inline int | |
622 | __xfrm6_selector_match(struct xfrm_selector *sel, struct flowi *fl) | |
623 | { | |
624 | return addr_match(&fl->fl6_dst, &sel->daddr, sel->prefixlen_d) && | |
625 | addr_match(&fl->fl6_src, &sel->saddr, sel->prefixlen_s) && | |
626 | !((xfrm_flowi_dport(fl) ^ sel->dport) & sel->dport_mask) && | |
627 | !((xfrm_flowi_sport(fl) ^ sel->sport) & sel->sport_mask) && | |
628 | (fl->proto == sel->proto || !sel->proto) && | |
629 | (fl->oif == sel->ifindex || !sel->ifindex); | |
630 | } | |
631 | ||
632 | static inline int | |
633 | xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, | |
634 | unsigned short family) | |
635 | { | |
636 | switch (family) { | |
637 | case AF_INET: | |
638 | return __xfrm4_selector_match(sel, fl); | |
639 | case AF_INET6: | |
640 | return __xfrm6_selector_match(sel, fl); | |
641 | } | |
642 | return 0; | |
643 | } | |
644 | ||
df71837d TJ |
645 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
646 | /* If neither has a context --> match | |
647 | * Otherwise, both must have a context and the sids, doi, alg must match | |
648 | */ | |
649 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
650 | { | |
651 | return ((!s1 && !s2) || | |
652 | (s1 && s2 && | |
653 | (s1->ctx_sid == s2->ctx_sid) && | |
654 | (s1->ctx_doi == s2->ctx_doi) && | |
655 | (s1->ctx_alg == s2->ctx_alg))); | |
656 | } | |
657 | #else | |
658 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
659 | { | |
660 | return 1; | |
661 | } | |
662 | #endif | |
663 | ||
1da177e4 LT |
664 | /* A struct encoding bundle of transformations to apply to some set of flow. |
665 | * | |
666 | * dst->child points to the next element of bundle. | |
667 | * dst->xfrm points to an instanse of transformer. | |
668 | * | |
669 | * Due to unfortunate limitations of current routing cache, which we | |
670 | * have no time to fix, it mirrors struct rtable and bound to the same | |
671 | * routing key, including saddr,daddr. However, we can have many of | |
672 | * bundles differing by session id. All the bundles grow from a parent | |
673 | * policy rule. | |
674 | */ | |
675 | struct xfrm_dst | |
676 | { | |
677 | union { | |
678 | struct xfrm_dst *next; | |
679 | struct dst_entry dst; | |
680 | struct rtable rt; | |
681 | struct rt6_info rt6; | |
682 | } u; | |
683 | struct dst_entry *route; | |
684 | u32 route_mtu_cached; | |
685 | u32 child_mtu_cached; | |
92d63dec HY |
686 | u32 route_cookie; |
687 | u32 path_cookie; | |
1da177e4 LT |
688 | }; |
689 | ||
aabc9761 HX |
690 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
691 | { | |
692 | dst_release(xdst->route); | |
693 | if (likely(xdst->u.dst.xfrm)) | |
694 | xfrm_state_put(xdst->u.dst.xfrm); | |
695 | } | |
696 | ||
697 | extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); | |
698 | ||
1da177e4 LT |
699 | struct sec_path |
700 | { | |
701 | atomic_t refcnt; | |
702 | int len; | |
dbe5b4aa | 703 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
1da177e4 LT |
704 | }; |
705 | ||
706 | static inline struct sec_path * | |
707 | secpath_get(struct sec_path *sp) | |
708 | { | |
709 | if (sp) | |
710 | atomic_inc(&sp->refcnt); | |
711 | return sp; | |
712 | } | |
713 | ||
714 | extern void __secpath_destroy(struct sec_path *sp); | |
715 | ||
716 | static inline void | |
717 | secpath_put(struct sec_path *sp) | |
718 | { | |
719 | if (sp && atomic_dec_and_test(&sp->refcnt)) | |
720 | __secpath_destroy(sp); | |
721 | } | |
722 | ||
723 | extern struct sec_path *secpath_dup(struct sec_path *src); | |
724 | ||
725 | static inline void | |
726 | secpath_reset(struct sk_buff *skb) | |
727 | { | |
728 | #ifdef CONFIG_XFRM | |
729 | secpath_put(skb->sp); | |
730 | skb->sp = NULL; | |
731 | #endif | |
732 | } | |
733 | ||
734 | static inline int | |
735 | __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) | |
736 | { | |
737 | return (tmpl->saddr.a4 && | |
738 | tmpl->saddr.a4 != x->props.saddr.a4); | |
739 | } | |
740 | ||
741 | static inline int | |
742 | __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) | |
743 | { | |
744 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
745 | ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); | |
746 | } | |
747 | ||
748 | static inline int | |
749 | xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) | |
750 | { | |
751 | switch (family) { | |
752 | case AF_INET: | |
753 | return __xfrm4_state_addr_cmp(tmpl, x); | |
754 | case AF_INET6: | |
755 | return __xfrm6_state_addr_cmp(tmpl, x); | |
756 | } | |
757 | return !0; | |
758 | } | |
759 | ||
760 | #ifdef CONFIG_XFRM | |
761 | ||
762 | extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); | |
763 | ||
764 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
765 | { | |
766 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) | |
767 | return __xfrm_policy_check(sk, dir, skb, family); | |
4e81bb83 MN |
768 | |
769 | return (xfrm_policy_lists_empty(dir) && !skb->sp) || | |
1da177e4 LT |
770 | (skb->dst->flags & DST_NOPOLICY) || |
771 | __xfrm_policy_check(sk, dir, skb, family); | |
772 | } | |
773 | ||
774 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
775 | { | |
776 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
777 | } | |
778 | ||
779 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
780 | { | |
781 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
782 | } | |
783 | ||
3e3850e9 | 784 | extern int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family); |
1da177e4 LT |
785 | extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
786 | ||
787 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
788 | { | |
4e81bb83 | 789 | return xfrm_policy_lists_empty(XFRM_POLICY_OUT) || |
1da177e4 LT |
790 | (skb->dst->flags & DST_NOXFRM) || |
791 | __xfrm_route_forward(skb, family); | |
792 | } | |
793 | ||
794 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
795 | { | |
796 | return xfrm_route_forward(skb, AF_INET); | |
797 | } | |
798 | ||
799 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
800 | { | |
801 | return xfrm_route_forward(skb, AF_INET6); | |
802 | } | |
803 | ||
804 | extern int __xfrm_sk_clone_policy(struct sock *sk); | |
805 | ||
806 | static inline int xfrm_sk_clone_policy(struct sock *sk) | |
807 | { | |
808 | if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) | |
809 | return __xfrm_sk_clone_policy(sk); | |
810 | return 0; | |
811 | } | |
812 | ||
4666faab | 813 | extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
814 | |
815 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
816 | { | |
817 | if (unlikely(sk->sk_policy[0] != NULL)) { | |
818 | xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); | |
819 | sk->sk_policy[0] = NULL; | |
820 | } | |
821 | if (unlikely(sk->sk_policy[1] != NULL)) { | |
822 | xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); | |
823 | sk->sk_policy[1] = NULL; | |
824 | } | |
825 | } | |
826 | ||
827 | #else | |
828 | ||
829 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
830 | static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } | |
831 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } | |
832 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
833 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
834 | { | |
835 | return 1; | |
836 | } | |
837 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
838 | { | |
839 | return 1; | |
840 | } | |
841 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
842 | { | |
843 | return 1; | |
844 | } | |
845 | #endif | |
846 | ||
847 | static __inline__ | |
848 | xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) | |
849 | { | |
850 | switch (family){ | |
851 | case AF_INET: | |
852 | return (xfrm_address_t *)&fl->fl4_dst; | |
853 | case AF_INET6: | |
854 | return (xfrm_address_t *)&fl->fl6_dst; | |
855 | } | |
856 | return NULL; | |
857 | } | |
858 | ||
859 | static __inline__ | |
860 | xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) | |
861 | { | |
862 | switch (family){ | |
863 | case AF_INET: | |
864 | return (xfrm_address_t *)&fl->fl4_src; | |
865 | case AF_INET6: | |
866 | return (xfrm_address_t *)&fl->fl6_src; | |
867 | } | |
868 | return NULL; | |
869 | } | |
870 | ||
871 | static __inline__ int | |
872 | __xfrm4_state_addr_check(struct xfrm_state *x, | |
873 | xfrm_address_t *daddr, xfrm_address_t *saddr) | |
874 | { | |
875 | if (daddr->a4 == x->id.daddr.a4 && | |
876 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
877 | return 1; | |
878 | return 0; | |
879 | } | |
880 | ||
881 | static __inline__ int | |
882 | __xfrm6_state_addr_check(struct xfrm_state *x, | |
883 | xfrm_address_t *daddr, xfrm_address_t *saddr) | |
884 | { | |
885 | if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && | |
886 | (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| | |
887 | ipv6_addr_any((struct in6_addr *)saddr) || | |
888 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) | |
889 | return 1; | |
890 | return 0; | |
891 | } | |
892 | ||
893 | static __inline__ int | |
894 | xfrm_state_addr_check(struct xfrm_state *x, | |
895 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
896 | unsigned short family) | |
897 | { | |
898 | switch (family) { | |
899 | case AF_INET: | |
900 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
901 | case AF_INET6: | |
902 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
903 | } | |
904 | return 0; | |
905 | } | |
906 | ||
e53820de MN |
907 | static __inline__ int |
908 | xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, | |
909 | unsigned short family) | |
910 | { | |
911 | switch (family) { | |
912 | case AF_INET: | |
913 | return __xfrm4_state_addr_check(x, | |
914 | (xfrm_address_t *)&fl->fl4_dst, | |
915 | (xfrm_address_t *)&fl->fl4_src); | |
916 | case AF_INET6: | |
917 | return __xfrm6_state_addr_check(x, | |
918 | (xfrm_address_t *)&fl->fl6_dst, | |
919 | (xfrm_address_t *)&fl->fl6_src); | |
920 | } | |
921 | return 0; | |
922 | } | |
923 | ||
1da177e4 LT |
924 | static inline int xfrm_state_kern(struct xfrm_state *x) |
925 | { | |
926 | return atomic_read(&x->tunnel_users); | |
927 | } | |
928 | ||
5794708f MN |
929 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
930 | { | |
dc00a525 MN |
931 | return (!userproto || proto == userproto || |
932 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
933 | proto == IPPROTO_ESP || | |
934 | proto == IPPROTO_COMP))); | |
5794708f MN |
935 | } |
936 | ||
1da177e4 LT |
937 | /* |
938 | * xfrm algorithm information | |
939 | */ | |
940 | struct xfrm_algo_auth_info { | |
941 | u16 icv_truncbits; | |
942 | u16 icv_fullbits; | |
943 | }; | |
944 | ||
945 | struct xfrm_algo_encr_info { | |
946 | u16 blockbits; | |
947 | u16 defkeybits; | |
948 | }; | |
949 | ||
950 | struct xfrm_algo_comp_info { | |
951 | u16 threshold; | |
952 | }; | |
953 | ||
954 | struct xfrm_algo_desc { | |
955 | char *name; | |
04ff1260 | 956 | char *compat; |
1da177e4 LT |
957 | u8 available:1; |
958 | union { | |
959 | struct xfrm_algo_auth_info auth; | |
960 | struct xfrm_algo_encr_info encr; | |
961 | struct xfrm_algo_comp_info comp; | |
962 | } uinfo; | |
963 | struct sadb_alg desc; | |
964 | }; | |
965 | ||
966 | /* XFRM tunnel handlers. */ | |
967 | struct xfrm_tunnel { | |
968 | int (*handler)(struct sk_buff *skb); | |
d2acc347 HX |
969 | int (*err_handler)(struct sk_buff *skb, __u32 info); |
970 | ||
971 | struct xfrm_tunnel *next; | |
972 | int priority; | |
1da177e4 LT |
973 | }; |
974 | ||
975 | struct xfrm6_tunnel { | |
d2acc347 HX |
976 | int (*handler)(struct sk_buff *skb); |
977 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
978 | int type, int code, int offset, __u32 info); | |
979 | ||
980 | struct xfrm6_tunnel *next; | |
981 | int priority; | |
1da177e4 LT |
982 | }; |
983 | ||
984 | extern void xfrm_init(void); | |
985 | extern void xfrm4_init(void); | |
986 | extern void xfrm6_init(void); | |
987 | extern void xfrm6_fini(void); | |
988 | extern void xfrm_state_init(void); | |
989 | extern void xfrm4_state_init(void); | |
1da177e4 LT |
990 | extern void xfrm6_state_init(void); |
991 | extern void xfrm6_state_fini(void); | |
992 | ||
993 | extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *); | |
994 | extern struct xfrm_state *xfrm_state_alloc(void); | |
995 | extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, | |
996 | struct flowi *fl, struct xfrm_tmpl *tmpl, | |
997 | struct xfrm_policy *pol, int *err, | |
998 | unsigned short family); | |
999 | extern int xfrm_state_check_expire(struct xfrm_state *x); | |
1000 | extern void xfrm_state_insert(struct xfrm_state *x); | |
1001 | extern int xfrm_state_add(struct xfrm_state *x); | |
1002 | extern int xfrm_state_update(struct xfrm_state *x); | |
1003 | extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto, unsigned short family); | |
eb2971b6 | 1004 | extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); |
1da177e4 | 1005 | extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq); |
26b15dad | 1006 | extern int xfrm_state_delete(struct xfrm_state *x); |
1da177e4 LT |
1007 | extern void xfrm_state_flush(u8 proto); |
1008 | extern int xfrm_replay_check(struct xfrm_state *x, u32 seq); | |
1009 | extern void xfrm_replay_advance(struct xfrm_state *x, u32 seq); | |
f8cd5488 | 1010 | extern void xfrm_replay_notify(struct xfrm_state *x, int event); |
1da177e4 LT |
1011 | extern int xfrm_state_check(struct xfrm_state *x, struct sk_buff *skb); |
1012 | extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); | |
72cb6962 | 1013 | extern int xfrm_init_state(struct xfrm_state *x); |
1da177e4 LT |
1014 | extern int xfrm4_rcv(struct sk_buff *skb); |
1015 | extern int xfrm4_output(struct sk_buff *skb); | |
1016 | extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler); | |
1017 | extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler); | |
d2acc347 | 1018 | extern int xfrm6_rcv_spi(struct sk_buff *skb, u32 spi); |
951dbc8a | 1019 | extern int xfrm6_rcv(struct sk_buff **pskb); |
fbd9a5b4 MN |
1020 | extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, |
1021 | xfrm_address_t *saddr, u8 proto); | |
1da177e4 LT |
1022 | extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler); |
1023 | extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler); | |
1024 | extern u32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); | |
1025 | extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); | |
1026 | extern u32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); | |
1027 | extern int xfrm6_output(struct sk_buff *skb); | |
aee5adb4 MN |
1028 | extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
1029 | u8 **prevhdr); | |
1da177e4 LT |
1030 | |
1031 | #ifdef CONFIG_XFRM | |
1032 | extern int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type); | |
1033 | extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); | |
1034 | extern int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family); | |
1035 | #else | |
1036 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1037 | { | |
1038 | return -ENOPROTOOPT; | |
1039 | } | |
1040 | ||
1041 | static inline int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type) | |
1042 | { | |
1043 | /* should not happen */ | |
1044 | kfree_skb(skb); | |
1045 | return 0; | |
1046 | } | |
1047 | static inline int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family) | |
1048 | { | |
1049 | return -EINVAL; | |
1050 | } | |
1051 | #endif | |
1052 | ||
dd0fc66f | 1053 | struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp); |
4e81bb83 | 1054 | extern int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*), void *); |
1da177e4 | 1055 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
4e81bb83 MN |
1056 | struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir, |
1057 | struct xfrm_selector *sel, | |
df71837d | 1058 | struct xfrm_sec_ctx *ctx, int delete); |
4e81bb83 MN |
1059 | struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete); |
1060 | void xfrm_policy_flush(u8 type); | |
1da177e4 LT |
1061 | u32 xfrm_get_acqseq(void); |
1062 | void xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); | |
1063 | struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto, | |
1064 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
1065 | int create, unsigned short family); | |
4e81bb83 | 1066 | extern void xfrm_policy_flush(u8 type); |
1da177e4 LT |
1067 | extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
1068 | extern int xfrm_flush_bundles(void); | |
399c180a | 1069 | extern void xfrm_flush_all_bundles(void); |
e53820de | 1070 | extern int xfrm_bundle_ok(struct xfrm_dst *xdst, struct flowi *fl, int family, int strict); |
1da177e4 LT |
1071 | extern void xfrm_init_pmtu(struct dst_entry *dst); |
1072 | ||
1073 | extern wait_queue_head_t km_waitq; | |
1074 | extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport); | |
6c5c8ca7 | 1075 | extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); |
97a64b45 | 1076 | extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
1da177e4 LT |
1077 | |
1078 | extern void xfrm_input_init(void); | |
1079 | extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, u32 *spi, u32 *seq); | |
1080 | ||
1081 | extern void xfrm_probe_algs(void); | |
1082 | extern int xfrm_count_auth_supported(void); | |
1083 | extern int xfrm_count_enc_supported(void); | |
1084 | extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1085 | extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1086 | extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1087 | extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1088 | extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1089 | extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); | |
1090 | extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); | |
1091 | extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); | |
1092 | ||
07d4ee58 | 1093 | struct hash_desc; |
9409f38a | 1094 | struct scatterlist; |
07d4ee58 HX |
1095 | typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, |
1096 | unsigned int); | |
1da177e4 | 1097 | |
07d4ee58 HX |
1098 | extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, |
1099 | int offset, int len, icv_update_fn_t icv_update); | |
1da177e4 LT |
1100 | |
1101 | static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, | |
1102 | int family) | |
1103 | { | |
1104 | switch (family) { | |
1105 | default: | |
1106 | case AF_INET: | |
1107 | return a->a4 - b->a4; | |
1108 | case AF_INET6: | |
1109 | return ipv6_addr_cmp((struct in6_addr *)a, | |
1110 | (struct in6_addr *)b); | |
1111 | } | |
1112 | } | |
1113 | ||
77d8d7a6 HX |
1114 | static inline int xfrm_policy_id2dir(u32 index) |
1115 | { | |
1116 | return index & 7; | |
1117 | } | |
1118 | ||
f8cd5488 JHS |
1119 | static inline int xfrm_aevent_is_on(void) |
1120 | { | |
be33690d PM |
1121 | struct sock *nlsk; |
1122 | int ret = 0; | |
1123 | ||
1124 | rcu_read_lock(); | |
1125 | nlsk = rcu_dereference(xfrm_nl); | |
1126 | if (nlsk) | |
1127 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1128 | rcu_read_unlock(); | |
1129 | return ret; | |
f8cd5488 JHS |
1130 | } |
1131 | ||
1132 | static inline void xfrm_aevent_doreplay(struct xfrm_state *x) | |
1133 | { | |
1134 | if (xfrm_aevent_is_on()) | |
1135 | xfrm_replay_notify(x, XFRM_REPLAY_UPDATE); | |
1136 | } | |
1137 | ||
1138 | ||
1da177e4 | 1139 | #endif /* _NET_XFRM_H */ |