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