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1 | #ifndef _NET_XFRM_H | |
2 | #define _NET_XFRM_H | |
3 | ||
4 | #include <linux/compiler.h> | |
5 | #include <linux/xfrm.h> | |
6 | #include <linux/spinlock.h> | |
7 | #include <linux/list.h> | |
8 | #include <linux/skbuff.h> | |
9 | #include <linux/socket.h> | |
10 | #include <linux/pfkeyv2.h> | |
11 | #include <linux/ipsec.h> | |
12 | #include <linux/in6.h> | |
13 | #include <linux/mutex.h> | |
14 | #include <linux/audit.h> | |
15 | #include <linux/slab.h> | |
16 | ||
17 | #include <net/sock.h> | |
18 | #include <net/dst.h> | |
19 | #include <net/ip.h> | |
20 | #include <net/route.h> | |
21 | #include <net/ipv6.h> | |
22 | #include <net/ip6_fib.h> | |
23 | #include <net/flow.h> | |
24 | ||
25 | #include <linux/interrupt.h> | |
26 | ||
27 | #ifdef CONFIG_XFRM_STATISTICS | |
28 | #include <net/snmp.h> | |
29 | #endif | |
30 | ||
31 | #define XFRM_PROTO_ESP 50 | |
32 | #define XFRM_PROTO_AH 51 | |
33 | #define XFRM_PROTO_COMP 108 | |
34 | #define XFRM_PROTO_IPIP 4 | |
35 | #define XFRM_PROTO_IPV6 41 | |
36 | #define XFRM_PROTO_ROUTING IPPROTO_ROUTING | |
37 | #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS | |
38 | ||
39 | #define XFRM_ALIGN4(len) (((len) + 3) & ~3) | |
40 | #define XFRM_ALIGN8(len) (((len) + 7) & ~7) | |
41 | #define MODULE_ALIAS_XFRM_MODE(family, encap) \ | |
42 | MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) | |
43 | #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ | |
44 | MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) | |
45 | ||
46 | #ifdef CONFIG_XFRM_STATISTICS | |
47 | #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) | |
48 | #define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field) | |
49 | #define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field) | |
50 | #else | |
51 | #define XFRM_INC_STATS(net, field) ((void)(net)) | |
52 | #define XFRM_INC_STATS_BH(net, field) ((void)(net)) | |
53 | #define XFRM_INC_STATS_USER(net, field) ((void)(net)) | |
54 | #endif | |
55 | ||
56 | ||
57 | /* Organization of SPD aka "XFRM rules" | |
58 | ------------------------------------ | |
59 | ||
60 | Basic objects: | |
61 | - policy rule, struct xfrm_policy (=SPD entry) | |
62 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) | |
63 | - instance of a transformer, struct xfrm_state (=SA) | |
64 | - template to clone xfrm_state, struct xfrm_tmpl | |
65 | ||
66 | SPD is plain linear list of xfrm_policy rules, ordered by priority. | |
67 | (To be compatible with existing pfkeyv2 implementations, | |
68 | many rules with priority of 0x7fffffff are allowed to exist and | |
69 | such rules are ordered in an unpredictable way, thanks to bsd folks.) | |
70 | ||
71 | Lookup is plain linear search until the first match with selector. | |
72 | ||
73 | If "action" is "block", then we prohibit the flow, otherwise: | |
74 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, | |
75 | policy entry has list of up to XFRM_MAX_DEPTH transformations, | |
76 | described by templates xfrm_tmpl. Each template is resolved | |
77 | to a complete xfrm_state (see below) and we pack bundle of transformations | |
78 | to a dst_entry returned to requestor. | |
79 | ||
80 | dst -. xfrm .-> xfrm_state #1 | |
81 | |---. child .-> dst -. xfrm .-> xfrm_state #2 | |
82 | |---. child .-> dst -. xfrm .-> xfrm_state #3 | |
83 | |---. child .-> NULL | |
84 | ||
85 | Bundles are cached at xrfm_policy struct (field ->bundles). | |
86 | ||
87 | ||
88 | Resolution of xrfm_tmpl | |
89 | ----------------------- | |
90 | Template contains: | |
91 | 1. ->mode Mode: transport or tunnel | |
92 | 2. ->id.proto Protocol: AH/ESP/IPCOMP | |
93 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. | |
94 | Q: allow to resolve security gateway? | |
95 | 4. ->id.spi If not zero, static SPI. | |
96 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. | |
97 | 6. ->algos List of allowed algos. Plain bitmask now. | |
98 | Q: ealgos, aalgos, calgos. What a mess... | |
99 | 7. ->share Sharing mode. | |
100 | Q: how to implement private sharing mode? To add struct sock* to | |
101 | flow id? | |
102 | ||
103 | Having this template we search through SAD searching for entries | |
104 | with appropriate mode/proto/algo, permitted by selector. | |
105 | If no appropriate entry found, it is requested from key manager. | |
106 | ||
107 | PROBLEMS: | |
108 | Q: How to find all the bundles referring to a physical path for | |
109 | PMTU discovery? Seems, dst should contain list of all parents... | |
110 | and enter to infinite locking hierarchy disaster. | |
111 | No! It is easier, we will not search for them, let them find us. | |
112 | We add genid to each dst plus pointer to genid of raw IP route, | |
113 | pmtu disc will update pmtu on raw IP route and increase its genid. | |
114 | dst_check() will see this for top level and trigger resyncing | |
115 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. | |
116 | */ | |
117 | ||
118 | struct xfrm_state_walk { | |
119 | struct list_head all; | |
120 | u8 state; | |
121 | u8 dying; | |
122 | u8 proto; | |
123 | u32 seq; | |
124 | struct xfrm_address_filter *filter; | |
125 | }; | |
126 | ||
127 | /* Full description of state of transformer. */ | |
128 | struct xfrm_state { | |
129 | possible_net_t xs_net; | |
130 | union { | |
131 | struct hlist_node gclist; | |
132 | struct hlist_node bydst; | |
133 | }; | |
134 | struct hlist_node bysrc; | |
135 | struct hlist_node byspi; | |
136 | ||
137 | atomic_t refcnt; | |
138 | spinlock_t lock; | |
139 | ||
140 | struct xfrm_id id; | |
141 | struct xfrm_selector sel; | |
142 | struct xfrm_mark mark; | |
143 | u32 tfcpad; | |
144 | ||
145 | u32 genid; | |
146 | ||
147 | /* Key manager bits */ | |
148 | struct xfrm_state_walk km; | |
149 | ||
150 | /* Parameters of this state. */ | |
151 | struct { | |
152 | u32 reqid; | |
153 | u8 mode; | |
154 | u8 replay_window; | |
155 | u8 aalgo, ealgo, calgo; | |
156 | u8 flags; | |
157 | u16 family; | |
158 | xfrm_address_t saddr; | |
159 | int header_len; | |
160 | int trailer_len; | |
161 | u32 extra_flags; | |
162 | } props; | |
163 | ||
164 | struct xfrm_lifetime_cfg lft; | |
165 | ||
166 | /* Data for transformer */ | |
167 | struct xfrm_algo_auth *aalg; | |
168 | struct xfrm_algo *ealg; | |
169 | struct xfrm_algo *calg; | |
170 | struct xfrm_algo_aead *aead; | |
171 | const char *geniv; | |
172 | ||
173 | /* Data for encapsulator */ | |
174 | struct xfrm_encap_tmpl *encap; | |
175 | ||
176 | /* Data for care-of address */ | |
177 | xfrm_address_t *coaddr; | |
178 | ||
179 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ | |
180 | struct xfrm_state *tunnel; | |
181 | ||
182 | /* If a tunnel, number of users + 1 */ | |
183 | atomic_t tunnel_users; | |
184 | ||
185 | /* State for replay detection */ | |
186 | struct xfrm_replay_state replay; | |
187 | struct xfrm_replay_state_esn *replay_esn; | |
188 | ||
189 | /* Replay detection state at the time we sent the last notification */ | |
190 | struct xfrm_replay_state preplay; | |
191 | struct xfrm_replay_state_esn *preplay_esn; | |
192 | ||
193 | /* The functions for replay detection. */ | |
194 | struct xfrm_replay *repl; | |
195 | ||
196 | /* internal flag that only holds state for delayed aevent at the | |
197 | * moment | |
198 | */ | |
199 | u32 xflags; | |
200 | ||
201 | /* Replay detection notification settings */ | |
202 | u32 replay_maxage; | |
203 | u32 replay_maxdiff; | |
204 | ||
205 | /* Replay detection notification timer */ | |
206 | struct timer_list rtimer; | |
207 | ||
208 | /* Statistics */ | |
209 | struct xfrm_stats stats; | |
210 | ||
211 | struct xfrm_lifetime_cur curlft; | |
212 | struct tasklet_hrtimer mtimer; | |
213 | ||
214 | /* used to fix curlft->add_time when changing date */ | |
215 | long saved_tmo; | |
216 | ||
217 | /* Last used time */ | |
218 | unsigned long lastused; | |
219 | ||
220 | /* Reference to data common to all the instances of this | |
221 | * transformer. */ | |
222 | const struct xfrm_type *type; | |
223 | struct xfrm_mode *inner_mode; | |
224 | struct xfrm_mode *inner_mode_iaf; | |
225 | struct xfrm_mode *outer_mode; | |
226 | ||
227 | /* Security context */ | |
228 | struct xfrm_sec_ctx *security; | |
229 | ||
230 | /* Private data of this transformer, format is opaque, | |
231 | * interpreted by xfrm_type methods. */ | |
232 | void *data; | |
233 | }; | |
234 | ||
235 | static inline struct net *xs_net(struct xfrm_state *x) | |
236 | { | |
237 | return read_pnet(&x->xs_net); | |
238 | } | |
239 | ||
240 | /* xflags - make enum if more show up */ | |
241 | #define XFRM_TIME_DEFER 1 | |
242 | #define XFRM_SOFT_EXPIRE 2 | |
243 | ||
244 | enum { | |
245 | XFRM_STATE_VOID, | |
246 | XFRM_STATE_ACQ, | |
247 | XFRM_STATE_VALID, | |
248 | XFRM_STATE_ERROR, | |
249 | XFRM_STATE_EXPIRED, | |
250 | XFRM_STATE_DEAD | |
251 | }; | |
252 | ||
253 | /* callback structure passed from either netlink or pfkey */ | |
254 | struct km_event { | |
255 | union { | |
256 | u32 hard; | |
257 | u32 proto; | |
258 | u32 byid; | |
259 | u32 aevent; | |
260 | u32 type; | |
261 | } data; | |
262 | ||
263 | u32 seq; | |
264 | u32 portid; | |
265 | u32 event; | |
266 | struct net *net; | |
267 | }; | |
268 | ||
269 | struct xfrm_replay { | |
270 | void (*advance)(struct xfrm_state *x, __be32 net_seq); | |
271 | int (*check)(struct xfrm_state *x, | |
272 | struct sk_buff *skb, | |
273 | __be32 net_seq); | |
274 | int (*recheck)(struct xfrm_state *x, | |
275 | struct sk_buff *skb, | |
276 | __be32 net_seq); | |
277 | void (*notify)(struct xfrm_state *x, int event); | |
278 | int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); | |
279 | }; | |
280 | ||
281 | struct net_device; | |
282 | struct xfrm_type; | |
283 | struct xfrm_dst; | |
284 | struct xfrm_policy_afinfo { | |
285 | unsigned short family; | |
286 | struct dst_ops *dst_ops; | |
287 | void (*garbage_collect)(struct net *net); | |
288 | struct dst_entry *(*dst_lookup)(struct net *net, | |
289 | int tos, int oif, | |
290 | const xfrm_address_t *saddr, | |
291 | const xfrm_address_t *daddr); | |
292 | int (*get_saddr)(struct net *net, int oif, | |
293 | xfrm_address_t *saddr, | |
294 | xfrm_address_t *daddr); | |
295 | void (*decode_session)(struct sk_buff *skb, | |
296 | struct flowi *fl, | |
297 | int reverse); | |
298 | int (*get_tos)(const struct flowi *fl); | |
299 | int (*init_path)(struct xfrm_dst *path, | |
300 | struct dst_entry *dst, | |
301 | int nfheader_len); | |
302 | int (*fill_dst)(struct xfrm_dst *xdst, | |
303 | struct net_device *dev, | |
304 | const struct flowi *fl); | |
305 | struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); | |
306 | }; | |
307 | ||
308 | int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); | |
309 | int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); | |
310 | void km_policy_notify(struct xfrm_policy *xp, int dir, | |
311 | const struct km_event *c); | |
312 | void km_state_notify(struct xfrm_state *x, const struct km_event *c); | |
313 | ||
314 | struct xfrm_tmpl; | |
315 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, | |
316 | struct xfrm_policy *pol); | |
317 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); | |
318 | int __xfrm_state_delete(struct xfrm_state *x); | |
319 | ||
320 | struct xfrm_state_afinfo { | |
321 | unsigned int family; | |
322 | unsigned int proto; | |
323 | __be16 eth_proto; | |
324 | struct module *owner; | |
325 | const struct xfrm_type *type_map[IPPROTO_MAX]; | |
326 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; | |
327 | int (*init_flags)(struct xfrm_state *x); | |
328 | void (*init_tempsel)(struct xfrm_selector *sel, | |
329 | const struct flowi *fl); | |
330 | void (*init_temprop)(struct xfrm_state *x, | |
331 | const struct xfrm_tmpl *tmpl, | |
332 | const xfrm_address_t *daddr, | |
333 | const xfrm_address_t *saddr); | |
334 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); | |
335 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); | |
336 | int (*output)(struct sock *sk, struct sk_buff *skb); | |
337 | int (*output_finish)(struct sock *sk, struct sk_buff *skb); | |
338 | int (*extract_input)(struct xfrm_state *x, | |
339 | struct sk_buff *skb); | |
340 | int (*extract_output)(struct xfrm_state *x, | |
341 | struct sk_buff *skb); | |
342 | int (*transport_finish)(struct sk_buff *skb, | |
343 | int async); | |
344 | void (*local_error)(struct sk_buff *skb, u32 mtu); | |
345 | }; | |
346 | ||
347 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); | |
348 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
349 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); | |
350 | void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); | |
351 | ||
352 | struct xfrm_input_afinfo { | |
353 | unsigned int family; | |
354 | struct module *owner; | |
355 | int (*callback)(struct sk_buff *skb, u8 protocol, | |
356 | int err); | |
357 | }; | |
358 | ||
359 | int xfrm_input_register_afinfo(struct xfrm_input_afinfo *afinfo); | |
360 | int xfrm_input_unregister_afinfo(struct xfrm_input_afinfo *afinfo); | |
361 | ||
362 | void xfrm_state_delete_tunnel(struct xfrm_state *x); | |
363 | ||
364 | struct xfrm_type { | |
365 | char *description; | |
366 | struct module *owner; | |
367 | u8 proto; | |
368 | u8 flags; | |
369 | #define XFRM_TYPE_NON_FRAGMENT 1 | |
370 | #define XFRM_TYPE_REPLAY_PROT 2 | |
371 | #define XFRM_TYPE_LOCAL_COADDR 4 | |
372 | #define XFRM_TYPE_REMOTE_COADDR 8 | |
373 | ||
374 | int (*init_state)(struct xfrm_state *x); | |
375 | void (*destructor)(struct xfrm_state *); | |
376 | int (*input)(struct xfrm_state *, struct sk_buff *skb); | |
377 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); | |
378 | int (*reject)(struct xfrm_state *, struct sk_buff *, | |
379 | const struct flowi *); | |
380 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); | |
381 | /* Estimate maximal size of result of transformation of a dgram */ | |
382 | u32 (*get_mtu)(struct xfrm_state *, int size); | |
383 | }; | |
384 | ||
385 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family); | |
386 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); | |
387 | ||
388 | struct xfrm_mode { | |
389 | /* | |
390 | * Remove encapsulation header. | |
391 | * | |
392 | * The IP header will be moved over the top of the encapsulation | |
393 | * header. | |
394 | * | |
395 | * On entry, the transport header shall point to where the IP header | |
396 | * should be and the network header shall be set to where the IP | |
397 | * header currently is. skb->data shall point to the start of the | |
398 | * payload. | |
399 | */ | |
400 | int (*input2)(struct xfrm_state *x, struct sk_buff *skb); | |
401 | ||
402 | /* | |
403 | * This is the actual input entry point. | |
404 | * | |
405 | * For transport mode and equivalent this would be identical to | |
406 | * input2 (which does not need to be set). While tunnel mode | |
407 | * and equivalent would set this to the tunnel encapsulation function | |
408 | * xfrm4_prepare_input that would in turn call input2. | |
409 | */ | |
410 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); | |
411 | ||
412 | /* | |
413 | * Add encapsulation header. | |
414 | * | |
415 | * On exit, the transport header will be set to the start of the | |
416 | * encapsulation header to be filled in by x->type->output and | |
417 | * the mac header will be set to the nextheader (protocol for | |
418 | * IPv4) field of the extension header directly preceding the | |
419 | * encapsulation header, or in its absence, that of the top IP | |
420 | * header. The value of the network header will always point | |
421 | * to the top IP header while skb->data will point to the payload. | |
422 | */ | |
423 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); | |
424 | ||
425 | /* | |
426 | * This is the actual output entry point. | |
427 | * | |
428 | * For transport mode and equivalent this would be identical to | |
429 | * output2 (which does not need to be set). While tunnel mode | |
430 | * and equivalent would set this to a tunnel encapsulation function | |
431 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn | |
432 | * call output2. | |
433 | */ | |
434 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); | |
435 | ||
436 | struct xfrm_state_afinfo *afinfo; | |
437 | struct module *owner; | |
438 | unsigned int encap; | |
439 | int flags; | |
440 | }; | |
441 | ||
442 | /* Flags for xfrm_mode. */ | |
443 | enum { | |
444 | XFRM_MODE_FLAG_TUNNEL = 1, | |
445 | }; | |
446 | ||
447 | int xfrm_register_mode(struct xfrm_mode *mode, int family); | |
448 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family); | |
449 | ||
450 | static inline int xfrm_af2proto(unsigned int family) | |
451 | { | |
452 | switch(family) { | |
453 | case AF_INET: | |
454 | return IPPROTO_IPIP; | |
455 | case AF_INET6: | |
456 | return IPPROTO_IPV6; | |
457 | default: | |
458 | return 0; | |
459 | } | |
460 | } | |
461 | ||
462 | static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) | |
463 | { | |
464 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || | |
465 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) | |
466 | return x->inner_mode; | |
467 | else | |
468 | return x->inner_mode_iaf; | |
469 | } | |
470 | ||
471 | struct xfrm_tmpl { | |
472 | /* id in template is interpreted as: | |
473 | * daddr - destination of tunnel, may be zero for transport mode. | |
474 | * spi - zero to acquire spi. Not zero if spi is static, then | |
475 | * daddr must be fixed too. | |
476 | * proto - AH/ESP/IPCOMP | |
477 | */ | |
478 | struct xfrm_id id; | |
479 | ||
480 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
481 | xfrm_address_t saddr; | |
482 | ||
483 | unsigned short encap_family; | |
484 | ||
485 | u32 reqid; | |
486 | ||
487 | /* Mode: transport, tunnel etc. */ | |
488 | u8 mode; | |
489 | ||
490 | /* Sharing mode: unique, this session only, this user only etc. */ | |
491 | u8 share; | |
492 | ||
493 | /* May skip this transfomration if no SA is found */ | |
494 | u8 optional; | |
495 | ||
496 | /* Skip aalgos/ealgos/calgos checks. */ | |
497 | u8 allalgs; | |
498 | ||
499 | /* Bit mask of algos allowed for acquisition */ | |
500 | u32 aalgos; | |
501 | u32 ealgos; | |
502 | u32 calgos; | |
503 | }; | |
504 | ||
505 | #define XFRM_MAX_DEPTH 6 | |
506 | ||
507 | struct xfrm_policy_walk_entry { | |
508 | struct list_head all; | |
509 | u8 dead; | |
510 | }; | |
511 | ||
512 | struct xfrm_policy_walk { | |
513 | struct xfrm_policy_walk_entry walk; | |
514 | u8 type; | |
515 | u32 seq; | |
516 | }; | |
517 | ||
518 | struct xfrm_policy_queue { | |
519 | struct sk_buff_head hold_queue; | |
520 | struct timer_list hold_timer; | |
521 | unsigned long timeout; | |
522 | }; | |
523 | ||
524 | struct xfrm_policy { | |
525 | possible_net_t xp_net; | |
526 | struct hlist_node bydst; | |
527 | struct hlist_node byidx; | |
528 | ||
529 | /* This lock only affects elements except for entry. */ | |
530 | rwlock_t lock; | |
531 | atomic_t refcnt; | |
532 | struct timer_list timer; | |
533 | ||
534 | struct flow_cache_object flo; | |
535 | atomic_t genid; | |
536 | u32 priority; | |
537 | u32 index; | |
538 | struct xfrm_mark mark; | |
539 | struct xfrm_selector selector; | |
540 | struct xfrm_lifetime_cfg lft; | |
541 | struct xfrm_lifetime_cur curlft; | |
542 | struct xfrm_policy_walk_entry walk; | |
543 | struct xfrm_policy_queue polq; | |
544 | u8 type; | |
545 | u8 action; | |
546 | u8 flags; | |
547 | u8 xfrm_nr; | |
548 | u16 family; | |
549 | struct xfrm_sec_ctx *security; | |
550 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; | |
551 | }; | |
552 | ||
553 | static inline struct net *xp_net(const struct xfrm_policy *xp) | |
554 | { | |
555 | return read_pnet(&xp->xp_net); | |
556 | } | |
557 | ||
558 | struct xfrm_kmaddress { | |
559 | xfrm_address_t local; | |
560 | xfrm_address_t remote; | |
561 | u32 reserved; | |
562 | u16 family; | |
563 | }; | |
564 | ||
565 | struct xfrm_migrate { | |
566 | xfrm_address_t old_daddr; | |
567 | xfrm_address_t old_saddr; | |
568 | xfrm_address_t new_daddr; | |
569 | xfrm_address_t new_saddr; | |
570 | u8 proto; | |
571 | u8 mode; | |
572 | u16 reserved; | |
573 | u32 reqid; | |
574 | u16 old_family; | |
575 | u16 new_family; | |
576 | }; | |
577 | ||
578 | #define XFRM_KM_TIMEOUT 30 | |
579 | /* what happened */ | |
580 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
581 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
582 | ||
583 | /* default aevent timeout in units of 100ms */ | |
584 | #define XFRM_AE_ETIME 10 | |
585 | /* Async Event timer multiplier */ | |
586 | #define XFRM_AE_ETH_M 10 | |
587 | /* default seq threshold size */ | |
588 | #define XFRM_AE_SEQT_SIZE 2 | |
589 | ||
590 | struct xfrm_mgr { | |
591 | struct list_head list; | |
592 | char *id; | |
593 | int (*notify)(struct xfrm_state *x, const struct km_event *c); | |
594 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); | |
595 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); | |
596 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); | |
597 | int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); | |
598 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); | |
599 | int (*migrate)(const struct xfrm_selector *sel, | |
600 | u8 dir, u8 type, | |
601 | const struct xfrm_migrate *m, | |
602 | int num_bundles, | |
603 | const struct xfrm_kmaddress *k); | |
604 | bool (*is_alive)(const struct km_event *c); | |
605 | }; | |
606 | ||
607 | int xfrm_register_km(struct xfrm_mgr *km); | |
608 | int xfrm_unregister_km(struct xfrm_mgr *km); | |
609 | ||
610 | struct xfrm_tunnel_skb_cb { | |
611 | union { | |
612 | struct inet_skb_parm h4; | |
613 | struct inet6_skb_parm h6; | |
614 | } header; | |
615 | ||
616 | union { | |
617 | struct ip_tunnel *ip4; | |
618 | struct ip6_tnl *ip6; | |
619 | } tunnel; | |
620 | }; | |
621 | ||
622 | #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) | |
623 | ||
624 | /* | |
625 | * This structure is used for the duration where packets are being | |
626 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
627 | * area beyond the generic IP part may be overwritten. | |
628 | */ | |
629 | struct xfrm_skb_cb { | |
630 | struct xfrm_tunnel_skb_cb header; | |
631 | ||
632 | /* Sequence number for replay protection. */ | |
633 | union { | |
634 | struct { | |
635 | __u32 low; | |
636 | __u32 hi; | |
637 | } output; | |
638 | struct { | |
639 | __be32 low; | |
640 | __be32 hi; | |
641 | } input; | |
642 | } seq; | |
643 | }; | |
644 | ||
645 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
646 | ||
647 | /* | |
648 | * This structure is used by the afinfo prepare_input/prepare_output functions | |
649 | * to transmit header information to the mode input/output functions. | |
650 | */ | |
651 | struct xfrm_mode_skb_cb { | |
652 | struct xfrm_tunnel_skb_cb header; | |
653 | ||
654 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
655 | __be16 id; | |
656 | __be16 frag_off; | |
657 | ||
658 | /* IP header length (excluding options or extension headers). */ | |
659 | u8 ihl; | |
660 | ||
661 | /* TOS for IPv4, class for IPv6. */ | |
662 | u8 tos; | |
663 | ||
664 | /* TTL for IPv4, hop limitfor IPv6. */ | |
665 | u8 ttl; | |
666 | ||
667 | /* Protocol for IPv4, NH for IPv6. */ | |
668 | u8 protocol; | |
669 | ||
670 | /* Option length for IPv4, zero for IPv6. */ | |
671 | u8 optlen; | |
672 | ||
673 | /* Used by IPv6 only, zero for IPv4. */ | |
674 | u8 flow_lbl[3]; | |
675 | }; | |
676 | ||
677 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
678 | ||
679 | /* | |
680 | * This structure is used by the input processing to locate the SPI and | |
681 | * related information. | |
682 | */ | |
683 | struct xfrm_spi_skb_cb { | |
684 | struct xfrm_tunnel_skb_cb header; | |
685 | ||
686 | unsigned int daddroff; | |
687 | unsigned int family; | |
688 | }; | |
689 | ||
690 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) | |
691 | ||
692 | #ifdef CONFIG_AUDITSYSCALL | |
693 | static inline struct audit_buffer *xfrm_audit_start(const char *op) | |
694 | { | |
695 | struct audit_buffer *audit_buf = NULL; | |
696 | ||
697 | if (audit_enabled == 0) | |
698 | return NULL; | |
699 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, | |
700 | AUDIT_MAC_IPSEC_EVENT); | |
701 | if (audit_buf == NULL) | |
702 | return NULL; | |
703 | audit_log_format(audit_buf, "op=%s", op); | |
704 | return audit_buf; | |
705 | } | |
706 | ||
707 | static inline void xfrm_audit_helper_usrinfo(bool task_valid, | |
708 | struct audit_buffer *audit_buf) | |
709 | { | |
710 | const unsigned int auid = from_kuid(&init_user_ns, task_valid ? | |
711 | audit_get_loginuid(current) : | |
712 | INVALID_UID); | |
713 | const unsigned int ses = task_valid ? audit_get_sessionid(current) : | |
714 | (unsigned int) -1; | |
715 | ||
716 | audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); | |
717 | audit_log_task_context(audit_buf); | |
718 | } | |
719 | ||
720 | void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid); | |
721 | void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
722 | bool task_valid); | |
723 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid); | |
724 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid); | |
725 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
726 | struct sk_buff *skb); | |
727 | void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, | |
728 | __be32 net_seq); | |
729 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); | |
730 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, | |
731 | __be32 net_seq); | |
732 | void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, | |
733 | u8 proto); | |
734 | #else | |
735 | ||
736 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
737 | bool task_valid) | |
738 | { | |
739 | } | |
740 | ||
741 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
742 | bool task_valid) | |
743 | { | |
744 | } | |
745 | ||
746 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
747 | bool task_valid) | |
748 | { | |
749 | } | |
750 | ||
751 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
752 | bool task_valid) | |
753 | { | |
754 | } | |
755 | ||
756 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
757 | struct sk_buff *skb) | |
758 | { | |
759 | } | |
760 | ||
761 | static inline void xfrm_audit_state_replay(struct xfrm_state *x, | |
762 | struct sk_buff *skb, __be32 net_seq) | |
763 | { | |
764 | } | |
765 | ||
766 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, | |
767 | u16 family) | |
768 | { | |
769 | } | |
770 | ||
771 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
772 | __be32 net_spi, __be32 net_seq) | |
773 | { | |
774 | } | |
775 | ||
776 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
777 | struct sk_buff *skb, u8 proto) | |
778 | { | |
779 | } | |
780 | #endif /* CONFIG_AUDITSYSCALL */ | |
781 | ||
782 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) | |
783 | { | |
784 | if (likely(policy != NULL)) | |
785 | atomic_inc(&policy->refcnt); | |
786 | } | |
787 | ||
788 | void xfrm_policy_destroy(struct xfrm_policy *policy); | |
789 | ||
790 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
791 | { | |
792 | if (atomic_dec_and_test(&policy->refcnt)) | |
793 | xfrm_policy_destroy(policy); | |
794 | } | |
795 | ||
796 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) | |
797 | { | |
798 | int i; | |
799 | for (i = npols - 1; i >= 0; --i) | |
800 | xfrm_pol_put(pols[i]); | |
801 | } | |
802 | ||
803 | void __xfrm_state_destroy(struct xfrm_state *); | |
804 | ||
805 | static inline void __xfrm_state_put(struct xfrm_state *x) | |
806 | { | |
807 | atomic_dec(&x->refcnt); | |
808 | } | |
809 | ||
810 | static inline void xfrm_state_put(struct xfrm_state *x) | |
811 | { | |
812 | if (atomic_dec_and_test(&x->refcnt)) | |
813 | __xfrm_state_destroy(x); | |
814 | } | |
815 | ||
816 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
817 | { | |
818 | atomic_inc(&x->refcnt); | |
819 | } | |
820 | ||
821 | static inline bool addr_match(const void *token1, const void *token2, | |
822 | int prefixlen) | |
823 | { | |
824 | const __be32 *a1 = token1; | |
825 | const __be32 *a2 = token2; | |
826 | int pdw; | |
827 | int pbi; | |
828 | ||
829 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ | |
830 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ | |
831 | ||
832 | if (pdw) | |
833 | if (memcmp(a1, a2, pdw << 2)) | |
834 | return false; | |
835 | ||
836 | if (pbi) { | |
837 | __be32 mask; | |
838 | ||
839 | mask = htonl((0xffffffff) << (32 - pbi)); | |
840 | ||
841 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
842 | return false; | |
843 | } | |
844 | ||
845 | return true; | |
846 | } | |
847 | ||
848 | static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) | |
849 | { | |
850 | /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ | |
851 | if (prefixlen == 0) | |
852 | return true; | |
853 | return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen))); | |
854 | } | |
855 | ||
856 | static __inline__ | |
857 | __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) | |
858 | { | |
859 | __be16 port; | |
860 | switch(fl->flowi_proto) { | |
861 | case IPPROTO_TCP: | |
862 | case IPPROTO_UDP: | |
863 | case IPPROTO_UDPLITE: | |
864 | case IPPROTO_SCTP: | |
865 | port = uli->ports.sport; | |
866 | break; | |
867 | case IPPROTO_ICMP: | |
868 | case IPPROTO_ICMPV6: | |
869 | port = htons(uli->icmpt.type); | |
870 | break; | |
871 | case IPPROTO_MH: | |
872 | port = htons(uli->mht.type); | |
873 | break; | |
874 | case IPPROTO_GRE: | |
875 | port = htons(ntohl(uli->gre_key) >> 16); | |
876 | break; | |
877 | default: | |
878 | port = 0; /*XXX*/ | |
879 | } | |
880 | return port; | |
881 | } | |
882 | ||
883 | static __inline__ | |
884 | __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) | |
885 | { | |
886 | __be16 port; | |
887 | switch(fl->flowi_proto) { | |
888 | case IPPROTO_TCP: | |
889 | case IPPROTO_UDP: | |
890 | case IPPROTO_UDPLITE: | |
891 | case IPPROTO_SCTP: | |
892 | port = uli->ports.dport; | |
893 | break; | |
894 | case IPPROTO_ICMP: | |
895 | case IPPROTO_ICMPV6: | |
896 | port = htons(uli->icmpt.code); | |
897 | break; | |
898 | case IPPROTO_GRE: | |
899 | port = htons(ntohl(uli->gre_key) & 0xffff); | |
900 | break; | |
901 | default: | |
902 | port = 0; /*XXX*/ | |
903 | } | |
904 | return port; | |
905 | } | |
906 | ||
907 | bool xfrm_selector_match(const struct xfrm_selector *sel, | |
908 | const struct flowi *fl, unsigned short family); | |
909 | ||
910 | #ifdef CONFIG_SECURITY_NETWORK_XFRM | |
911 | /* If neither has a context --> match | |
912 | * Otherwise, both must have a context and the sids, doi, alg must match | |
913 | */ | |
914 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
915 | { | |
916 | return ((!s1 && !s2) || | |
917 | (s1 && s2 && | |
918 | (s1->ctx_sid == s2->ctx_sid) && | |
919 | (s1->ctx_doi == s2->ctx_doi) && | |
920 | (s1->ctx_alg == s2->ctx_alg))); | |
921 | } | |
922 | #else | |
923 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
924 | { | |
925 | return true; | |
926 | } | |
927 | #endif | |
928 | ||
929 | /* A struct encoding bundle of transformations to apply to some set of flow. | |
930 | * | |
931 | * dst->child points to the next element of bundle. | |
932 | * dst->xfrm points to an instanse of transformer. | |
933 | * | |
934 | * Due to unfortunate limitations of current routing cache, which we | |
935 | * have no time to fix, it mirrors struct rtable and bound to the same | |
936 | * routing key, including saddr,daddr. However, we can have many of | |
937 | * bundles differing by session id. All the bundles grow from a parent | |
938 | * policy rule. | |
939 | */ | |
940 | struct xfrm_dst { | |
941 | union { | |
942 | struct dst_entry dst; | |
943 | struct rtable rt; | |
944 | struct rt6_info rt6; | |
945 | } u; | |
946 | struct dst_entry *route; | |
947 | struct flow_cache_object flo; | |
948 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; | |
949 | int num_pols, num_xfrms; | |
950 | #ifdef CONFIG_XFRM_SUB_POLICY | |
951 | struct flowi *origin; | |
952 | struct xfrm_selector *partner; | |
953 | #endif | |
954 | u32 xfrm_genid; | |
955 | u32 policy_genid; | |
956 | u32 route_mtu_cached; | |
957 | u32 child_mtu_cached; | |
958 | u32 route_cookie; | |
959 | u32 path_cookie; | |
960 | }; | |
961 | ||
962 | #ifdef CONFIG_XFRM | |
963 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) | |
964 | { | |
965 | xfrm_pols_put(xdst->pols, xdst->num_pols); | |
966 | dst_release(xdst->route); | |
967 | if (likely(xdst->u.dst.xfrm)) | |
968 | xfrm_state_put(xdst->u.dst.xfrm); | |
969 | #ifdef CONFIG_XFRM_SUB_POLICY | |
970 | kfree(xdst->origin); | |
971 | xdst->origin = NULL; | |
972 | kfree(xdst->partner); | |
973 | xdst->partner = NULL; | |
974 | #endif | |
975 | } | |
976 | #endif | |
977 | ||
978 | void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); | |
979 | ||
980 | struct sec_path { | |
981 | atomic_t refcnt; | |
982 | int len; | |
983 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; | |
984 | }; | |
985 | ||
986 | static inline int secpath_exists(struct sk_buff *skb) | |
987 | { | |
988 | #ifdef CONFIG_XFRM | |
989 | return skb->sp != NULL; | |
990 | #else | |
991 | return 0; | |
992 | #endif | |
993 | } | |
994 | ||
995 | static inline struct sec_path * | |
996 | secpath_get(struct sec_path *sp) | |
997 | { | |
998 | if (sp) | |
999 | atomic_inc(&sp->refcnt); | |
1000 | return sp; | |
1001 | } | |
1002 | ||
1003 | void __secpath_destroy(struct sec_path *sp); | |
1004 | ||
1005 | static inline void | |
1006 | secpath_put(struct sec_path *sp) | |
1007 | { | |
1008 | if (sp && atomic_dec_and_test(&sp->refcnt)) | |
1009 | __secpath_destroy(sp); | |
1010 | } | |
1011 | ||
1012 | struct sec_path *secpath_dup(struct sec_path *src); | |
1013 | ||
1014 | static inline void | |
1015 | secpath_reset(struct sk_buff *skb) | |
1016 | { | |
1017 | #ifdef CONFIG_XFRM | |
1018 | secpath_put(skb->sp); | |
1019 | skb->sp = NULL; | |
1020 | #endif | |
1021 | } | |
1022 | ||
1023 | static inline int | |
1024 | xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) | |
1025 | { | |
1026 | switch (family) { | |
1027 | case AF_INET: | |
1028 | return addr->a4 == 0; | |
1029 | case AF_INET6: | |
1030 | return ipv6_addr_any(&addr->in6); | |
1031 | } | |
1032 | return 0; | |
1033 | } | |
1034 | ||
1035 | static inline int | |
1036 | __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) | |
1037 | { | |
1038 | return (tmpl->saddr.a4 && | |
1039 | tmpl->saddr.a4 != x->props.saddr.a4); | |
1040 | } | |
1041 | ||
1042 | static inline int | |
1043 | __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) | |
1044 | { | |
1045 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
1046 | !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); | |
1047 | } | |
1048 | ||
1049 | static inline int | |
1050 | xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) | |
1051 | { | |
1052 | switch (family) { | |
1053 | case AF_INET: | |
1054 | return __xfrm4_state_addr_cmp(tmpl, x); | |
1055 | case AF_INET6: | |
1056 | return __xfrm6_state_addr_cmp(tmpl, x); | |
1057 | } | |
1058 | return !0; | |
1059 | } | |
1060 | ||
1061 | #ifdef CONFIG_XFRM | |
1062 | int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, | |
1063 | unsigned short family); | |
1064 | ||
1065 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, | |
1066 | struct sk_buff *skb, | |
1067 | unsigned int family, int reverse) | |
1068 | { | |
1069 | struct net *net = dev_net(skb->dev); | |
1070 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); | |
1071 | ||
1072 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) | |
1073 | return __xfrm_policy_check(sk, ndir, skb, family); | |
1074 | ||
1075 | return (!net->xfrm.policy_count[dir] && !skb->sp) || | |
1076 | (skb_dst(skb)->flags & DST_NOPOLICY) || | |
1077 | __xfrm_policy_check(sk, ndir, skb, family); | |
1078 | } | |
1079 | ||
1080 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1081 | { | |
1082 | return __xfrm_policy_check2(sk, dir, skb, family, 0); | |
1083 | } | |
1084 | ||
1085 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1086 | { | |
1087 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
1088 | } | |
1089 | ||
1090 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1091 | { | |
1092 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
1093 | } | |
1094 | ||
1095 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, | |
1096 | struct sk_buff *skb) | |
1097 | { | |
1098 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); | |
1099 | } | |
1100 | ||
1101 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1102 | struct sk_buff *skb) | |
1103 | { | |
1104 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); | |
1105 | } | |
1106 | ||
1107 | int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1108 | unsigned int family, int reverse); | |
1109 | ||
1110 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1111 | unsigned int family) | |
1112 | { | |
1113 | return __xfrm_decode_session(skb, fl, family, 0); | |
1114 | } | |
1115 | ||
1116 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, | |
1117 | struct flowi *fl, | |
1118 | unsigned int family) | |
1119 | { | |
1120 | return __xfrm_decode_session(skb, fl, family, 1); | |
1121 | } | |
1122 | ||
1123 | int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); | |
1124 | ||
1125 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
1126 | { | |
1127 | struct net *net = dev_net(skb->dev); | |
1128 | ||
1129 | return !net->xfrm.policy_count[XFRM_POLICY_OUT] || | |
1130 | (skb_dst(skb)->flags & DST_NOXFRM) || | |
1131 | __xfrm_route_forward(skb, family); | |
1132 | } | |
1133 | ||
1134 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
1135 | { | |
1136 | return xfrm_route_forward(skb, AF_INET); | |
1137 | } | |
1138 | ||
1139 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
1140 | { | |
1141 | return xfrm_route_forward(skb, AF_INET6); | |
1142 | } | |
1143 | ||
1144 | int __xfrm_sk_clone_policy(struct sock *sk); | |
1145 | ||
1146 | static inline int xfrm_sk_clone_policy(struct sock *sk) | |
1147 | { | |
1148 | if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) | |
1149 | return __xfrm_sk_clone_policy(sk); | |
1150 | return 0; | |
1151 | } | |
1152 | ||
1153 | int xfrm_policy_delete(struct xfrm_policy *pol, int dir); | |
1154 | ||
1155 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
1156 | { | |
1157 | if (unlikely(sk->sk_policy[0] != NULL)) { | |
1158 | xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); | |
1159 | sk->sk_policy[0] = NULL; | |
1160 | } | |
1161 | if (unlikely(sk->sk_policy[1] != NULL)) { | |
1162 | xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); | |
1163 | sk->sk_policy[1] = NULL; | |
1164 | } | |
1165 | } | |
1166 | ||
1167 | void xfrm_garbage_collect(struct net *net); | |
1168 | ||
1169 | #else | |
1170 | ||
1171 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
1172 | static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } | |
1173 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } | |
1174 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
1175 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1176 | { | |
1177 | return 1; | |
1178 | } | |
1179 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1180 | { | |
1181 | return 1; | |
1182 | } | |
1183 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1184 | { | |
1185 | return 1; | |
1186 | } | |
1187 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, | |
1188 | struct flowi *fl, | |
1189 | unsigned int family) | |
1190 | { | |
1191 | return -ENOSYS; | |
1192 | } | |
1193 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, | |
1194 | struct sk_buff *skb) | |
1195 | { | |
1196 | return 1; | |
1197 | } | |
1198 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1199 | struct sk_buff *skb) | |
1200 | { | |
1201 | return 1; | |
1202 | } | |
1203 | static inline void xfrm_garbage_collect(struct net *net) | |
1204 | { | |
1205 | } | |
1206 | #endif | |
1207 | ||
1208 | static __inline__ | |
1209 | xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) | |
1210 | { | |
1211 | switch (family){ | |
1212 | case AF_INET: | |
1213 | return (xfrm_address_t *)&fl->u.ip4.daddr; | |
1214 | case AF_INET6: | |
1215 | return (xfrm_address_t *)&fl->u.ip6.daddr; | |
1216 | } | |
1217 | return NULL; | |
1218 | } | |
1219 | ||
1220 | static __inline__ | |
1221 | xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) | |
1222 | { | |
1223 | switch (family){ | |
1224 | case AF_INET: | |
1225 | return (xfrm_address_t *)&fl->u.ip4.saddr; | |
1226 | case AF_INET6: | |
1227 | return (xfrm_address_t *)&fl->u.ip6.saddr; | |
1228 | } | |
1229 | return NULL; | |
1230 | } | |
1231 | ||
1232 | static __inline__ | |
1233 | void xfrm_flowi_addr_get(const struct flowi *fl, | |
1234 | xfrm_address_t *saddr, xfrm_address_t *daddr, | |
1235 | unsigned short family) | |
1236 | { | |
1237 | switch(family) { | |
1238 | case AF_INET: | |
1239 | memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); | |
1240 | memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); | |
1241 | break; | |
1242 | case AF_INET6: | |
1243 | saddr->in6 = fl->u.ip6.saddr; | |
1244 | daddr->in6 = fl->u.ip6.daddr; | |
1245 | break; | |
1246 | } | |
1247 | } | |
1248 | ||
1249 | static __inline__ int | |
1250 | __xfrm4_state_addr_check(const struct xfrm_state *x, | |
1251 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1252 | { | |
1253 | if (daddr->a4 == x->id.daddr.a4 && | |
1254 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
1255 | return 1; | |
1256 | return 0; | |
1257 | } | |
1258 | ||
1259 | static __inline__ int | |
1260 | __xfrm6_state_addr_check(const struct xfrm_state *x, | |
1261 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1262 | { | |
1263 | if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && | |
1264 | (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || | |
1265 | ipv6_addr_any((struct in6_addr *)saddr) || | |
1266 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) | |
1267 | return 1; | |
1268 | return 0; | |
1269 | } | |
1270 | ||
1271 | static __inline__ int | |
1272 | xfrm_state_addr_check(const struct xfrm_state *x, | |
1273 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, | |
1274 | unsigned short family) | |
1275 | { | |
1276 | switch (family) { | |
1277 | case AF_INET: | |
1278 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
1279 | case AF_INET6: | |
1280 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
1281 | } | |
1282 | return 0; | |
1283 | } | |
1284 | ||
1285 | static __inline__ int | |
1286 | xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, | |
1287 | unsigned short family) | |
1288 | { | |
1289 | switch (family) { | |
1290 | case AF_INET: | |
1291 | return __xfrm4_state_addr_check(x, | |
1292 | (const xfrm_address_t *)&fl->u.ip4.daddr, | |
1293 | (const xfrm_address_t *)&fl->u.ip4.saddr); | |
1294 | case AF_INET6: | |
1295 | return __xfrm6_state_addr_check(x, | |
1296 | (const xfrm_address_t *)&fl->u.ip6.daddr, | |
1297 | (const xfrm_address_t *)&fl->u.ip6.saddr); | |
1298 | } | |
1299 | return 0; | |
1300 | } | |
1301 | ||
1302 | static inline int xfrm_state_kern(const struct xfrm_state *x) | |
1303 | { | |
1304 | return atomic_read(&x->tunnel_users); | |
1305 | } | |
1306 | ||
1307 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) | |
1308 | { | |
1309 | return (!userproto || proto == userproto || | |
1310 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
1311 | proto == IPPROTO_ESP || | |
1312 | proto == IPPROTO_COMP))); | |
1313 | } | |
1314 | ||
1315 | /* | |
1316 | * xfrm algorithm information | |
1317 | */ | |
1318 | struct xfrm_algo_aead_info { | |
1319 | char *geniv; | |
1320 | u16 icv_truncbits; | |
1321 | }; | |
1322 | ||
1323 | struct xfrm_algo_auth_info { | |
1324 | u16 icv_truncbits; | |
1325 | u16 icv_fullbits; | |
1326 | }; | |
1327 | ||
1328 | struct xfrm_algo_encr_info { | |
1329 | char *geniv; | |
1330 | u16 blockbits; | |
1331 | u16 defkeybits; | |
1332 | }; | |
1333 | ||
1334 | struct xfrm_algo_comp_info { | |
1335 | u16 threshold; | |
1336 | }; | |
1337 | ||
1338 | struct xfrm_algo_desc { | |
1339 | char *name; | |
1340 | char *compat; | |
1341 | u8 available:1; | |
1342 | u8 pfkey_supported:1; | |
1343 | union { | |
1344 | struct xfrm_algo_aead_info aead; | |
1345 | struct xfrm_algo_auth_info auth; | |
1346 | struct xfrm_algo_encr_info encr; | |
1347 | struct xfrm_algo_comp_info comp; | |
1348 | } uinfo; | |
1349 | struct sadb_alg desc; | |
1350 | }; | |
1351 | ||
1352 | /* XFRM protocol handlers. */ | |
1353 | struct xfrm4_protocol { | |
1354 | int (*handler)(struct sk_buff *skb); | |
1355 | int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1356 | int encap_type); | |
1357 | int (*cb_handler)(struct sk_buff *skb, int err); | |
1358 | int (*err_handler)(struct sk_buff *skb, u32 info); | |
1359 | ||
1360 | struct xfrm4_protocol __rcu *next; | |
1361 | int priority; | |
1362 | }; | |
1363 | ||
1364 | struct xfrm6_protocol { | |
1365 | int (*handler)(struct sk_buff *skb); | |
1366 | int (*cb_handler)(struct sk_buff *skb, int err); | |
1367 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
1368 | u8 type, u8 code, int offset, __be32 info); | |
1369 | ||
1370 | struct xfrm6_protocol __rcu *next; | |
1371 | int priority; | |
1372 | }; | |
1373 | ||
1374 | /* XFRM tunnel handlers. */ | |
1375 | struct xfrm_tunnel { | |
1376 | int (*handler)(struct sk_buff *skb); | |
1377 | int (*err_handler)(struct sk_buff *skb, u32 info); | |
1378 | ||
1379 | struct xfrm_tunnel __rcu *next; | |
1380 | int priority; | |
1381 | }; | |
1382 | ||
1383 | struct xfrm6_tunnel { | |
1384 | int (*handler)(struct sk_buff *skb); | |
1385 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
1386 | u8 type, u8 code, int offset, __be32 info); | |
1387 | struct xfrm6_tunnel __rcu *next; | |
1388 | int priority; | |
1389 | }; | |
1390 | ||
1391 | void xfrm_init(void); | |
1392 | void xfrm4_init(void); | |
1393 | int xfrm_state_init(struct net *net); | |
1394 | void xfrm_state_fini(struct net *net); | |
1395 | void xfrm4_state_init(void); | |
1396 | void xfrm4_protocol_init(void); | |
1397 | #ifdef CONFIG_XFRM | |
1398 | int xfrm6_init(void); | |
1399 | void xfrm6_fini(void); | |
1400 | int xfrm6_state_init(void); | |
1401 | void xfrm6_state_fini(void); | |
1402 | int xfrm6_protocol_init(void); | |
1403 | void xfrm6_protocol_fini(void); | |
1404 | #else | |
1405 | static inline int xfrm6_init(void) | |
1406 | { | |
1407 | return 0; | |
1408 | } | |
1409 | static inline void xfrm6_fini(void) | |
1410 | { | |
1411 | ; | |
1412 | } | |
1413 | #endif | |
1414 | ||
1415 | #ifdef CONFIG_XFRM_STATISTICS | |
1416 | int xfrm_proc_init(struct net *net); | |
1417 | void xfrm_proc_fini(struct net *net); | |
1418 | #endif | |
1419 | ||
1420 | int xfrm_sysctl_init(struct net *net); | |
1421 | #ifdef CONFIG_SYSCTL | |
1422 | void xfrm_sysctl_fini(struct net *net); | |
1423 | #else | |
1424 | static inline void xfrm_sysctl_fini(struct net *net) | |
1425 | { | |
1426 | } | |
1427 | #endif | |
1428 | ||
1429 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, | |
1430 | struct xfrm_address_filter *filter); | |
1431 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, | |
1432 | int (*func)(struct xfrm_state *, int, void*), void *); | |
1433 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); | |
1434 | struct xfrm_state *xfrm_state_alloc(struct net *net); | |
1435 | struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, | |
1436 | const xfrm_address_t *saddr, | |
1437 | const struct flowi *fl, | |
1438 | struct xfrm_tmpl *tmpl, | |
1439 | struct xfrm_policy *pol, int *err, | |
1440 | unsigned short family); | |
1441 | struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, | |
1442 | xfrm_address_t *daddr, | |
1443 | xfrm_address_t *saddr, | |
1444 | unsigned short family, | |
1445 | u8 mode, u8 proto, u32 reqid); | |
1446 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, | |
1447 | unsigned short family); | |
1448 | int xfrm_state_check_expire(struct xfrm_state *x); | |
1449 | void xfrm_state_insert(struct xfrm_state *x); | |
1450 | int xfrm_state_add(struct xfrm_state *x); | |
1451 | int xfrm_state_update(struct xfrm_state *x); | |
1452 | struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, | |
1453 | const xfrm_address_t *daddr, __be32 spi, | |
1454 | u8 proto, unsigned short family); | |
1455 | struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, | |
1456 | const xfrm_address_t *daddr, | |
1457 | const xfrm_address_t *saddr, | |
1458 | u8 proto, | |
1459 | unsigned short family); | |
1460 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1461 | int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, | |
1462 | unsigned short family, struct net *net); | |
1463 | int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, | |
1464 | unsigned short family); | |
1465 | #else | |
1466 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
1467 | int n, unsigned short family, struct net *net) | |
1468 | { | |
1469 | return -ENOSYS; | |
1470 | } | |
1471 | ||
1472 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1473 | int n, unsigned short family) | |
1474 | { | |
1475 | return -ENOSYS; | |
1476 | } | |
1477 | #endif | |
1478 | ||
1479 | struct xfrmk_sadinfo { | |
1480 | u32 sadhcnt; /* current hash bkts */ | |
1481 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1482 | u32 sadcnt; /* current running count */ | |
1483 | }; | |
1484 | ||
1485 | struct xfrmk_spdinfo { | |
1486 | u32 incnt; | |
1487 | u32 outcnt; | |
1488 | u32 fwdcnt; | |
1489 | u32 inscnt; | |
1490 | u32 outscnt; | |
1491 | u32 fwdscnt; | |
1492 | u32 spdhcnt; | |
1493 | u32 spdhmcnt; | |
1494 | }; | |
1495 | ||
1496 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); | |
1497 | int xfrm_state_delete(struct xfrm_state *x); | |
1498 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid); | |
1499 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); | |
1500 | void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); | |
1501 | u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); | |
1502 | int xfrm_init_replay(struct xfrm_state *x); | |
1503 | int xfrm_state_mtu(struct xfrm_state *x, int mtu); | |
1504 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay); | |
1505 | int xfrm_init_state(struct xfrm_state *x); | |
1506 | int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); | |
1507 | int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); | |
1508 | int xfrm_input_resume(struct sk_buff *skb, int nexthdr); | |
1509 | int xfrm_output_resume(struct sk_buff *skb, int err); | |
1510 | int xfrm_output(struct sock *sk, struct sk_buff *skb); | |
1511 | int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); | |
1512 | void xfrm_local_error(struct sk_buff *skb, int mtu); | |
1513 | int xfrm4_extract_header(struct sk_buff *skb); | |
1514 | int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); | |
1515 | int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1516 | int encap_type); | |
1517 | int xfrm4_transport_finish(struct sk_buff *skb, int async); | |
1518 | int xfrm4_rcv(struct sk_buff *skb); | |
1519 | ||
1520 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1521 | { | |
1522 | XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; | |
1523 | XFRM_SPI_SKB_CB(skb)->family = AF_INET; | |
1524 | XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); | |
1525 | return xfrm_input(skb, nexthdr, spi, 0); | |
1526 | } | |
1527 | ||
1528 | int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); | |
1529 | int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1530 | int xfrm4_output(struct sock *sk, struct sk_buff *skb); | |
1531 | int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb); | |
1532 | int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err); | |
1533 | int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); | |
1534 | int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol); | |
1535 | int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); | |
1536 | int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
1537 | void xfrm4_local_error(struct sk_buff *skb, u32 mtu); | |
1538 | int xfrm6_extract_header(struct sk_buff *skb); | |
1539 | int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); | |
1540 | int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); | |
1541 | int xfrm6_transport_finish(struct sk_buff *skb, int async); | |
1542 | int xfrm6_rcv(struct sk_buff *skb); | |
1543 | int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, | |
1544 | xfrm_address_t *saddr, u8 proto); | |
1545 | void xfrm6_local_error(struct sk_buff *skb, u32 mtu); | |
1546 | int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err); | |
1547 | int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol); | |
1548 | int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol); | |
1549 | int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); | |
1550 | int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); | |
1551 | __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); | |
1552 | __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); | |
1553 | int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); | |
1554 | int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1555 | int xfrm6_output(struct sock *sk, struct sk_buff *skb); | |
1556 | int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb); | |
1557 | int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, | |
1558 | u8 **prevhdr); | |
1559 | ||
1560 | #ifdef CONFIG_XFRM | |
1561 | int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); | |
1562 | int xfrm_user_policy(struct sock *sk, int optname, | |
1563 | u8 __user *optval, int optlen); | |
1564 | #else | |
1565 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1566 | { | |
1567 | return -ENOPROTOOPT; | |
1568 | } | |
1569 | ||
1570 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) | |
1571 | { | |
1572 | /* should not happen */ | |
1573 | kfree_skb(skb); | |
1574 | return 0; | |
1575 | } | |
1576 | #endif | |
1577 | ||
1578 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); | |
1579 | ||
1580 | void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); | |
1581 | int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, | |
1582 | int (*func)(struct xfrm_policy *, int, int, void*), | |
1583 | void *); | |
1584 | void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); | |
1585 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); | |
1586 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, | |
1587 | u8 type, int dir, | |
1588 | struct xfrm_selector *sel, | |
1589 | struct xfrm_sec_ctx *ctx, int delete, | |
1590 | int *err); | |
1591 | struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, | |
1592 | u32 id, int delete, int *err); | |
1593 | int xfrm_policy_flush(struct net *net, u8 type, bool task_valid); | |
1594 | void xfrm_policy_hash_rebuild(struct net *net); | |
1595 | u32 xfrm_get_acqseq(void); | |
1596 | int verify_spi_info(u8 proto, u32 min, u32 max); | |
1597 | int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); | |
1598 | struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, | |
1599 | u8 mode, u32 reqid, u8 proto, | |
1600 | const xfrm_address_t *daddr, | |
1601 | const xfrm_address_t *saddr, int create, | |
1602 | unsigned short family); | |
1603 | int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); | |
1604 | ||
1605 | #ifdef CONFIG_XFRM_MIGRATE | |
1606 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, | |
1607 | const struct xfrm_migrate *m, int num_bundles, | |
1608 | const struct xfrm_kmaddress *k); | |
1609 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net); | |
1610 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, | |
1611 | struct xfrm_migrate *m); | |
1612 | int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, | |
1613 | struct xfrm_migrate *m, int num_bundles, | |
1614 | struct xfrm_kmaddress *k, struct net *net); | |
1615 | #endif | |
1616 | ||
1617 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); | |
1618 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); | |
1619 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, | |
1620 | xfrm_address_t *addr); | |
1621 | ||
1622 | void xfrm_input_init(void); | |
1623 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); | |
1624 | ||
1625 | void xfrm_probe_algs(void); | |
1626 | int xfrm_count_pfkey_auth_supported(void); | |
1627 | int xfrm_count_pfkey_enc_supported(void); | |
1628 | struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1629 | struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1630 | struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1631 | struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1632 | struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1633 | struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); | |
1634 | struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); | |
1635 | struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); | |
1636 | struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, | |
1637 | int probe); | |
1638 | ||
1639 | static inline bool xfrm6_addr_equal(const xfrm_address_t *a, | |
1640 | const xfrm_address_t *b) | |
1641 | { | |
1642 | return ipv6_addr_equal((const struct in6_addr *)a, | |
1643 | (const struct in6_addr *)b); | |
1644 | } | |
1645 | ||
1646 | static inline bool xfrm_addr_equal(const xfrm_address_t *a, | |
1647 | const xfrm_address_t *b, | |
1648 | sa_family_t family) | |
1649 | { | |
1650 | switch (family) { | |
1651 | default: | |
1652 | case AF_INET: | |
1653 | return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; | |
1654 | case AF_INET6: | |
1655 | return xfrm6_addr_equal(a, b); | |
1656 | } | |
1657 | } | |
1658 | ||
1659 | static inline int xfrm_policy_id2dir(u32 index) | |
1660 | { | |
1661 | return index & 7; | |
1662 | } | |
1663 | ||
1664 | #ifdef CONFIG_XFRM | |
1665 | static inline int xfrm_aevent_is_on(struct net *net) | |
1666 | { | |
1667 | struct sock *nlsk; | |
1668 | int ret = 0; | |
1669 | ||
1670 | rcu_read_lock(); | |
1671 | nlsk = rcu_dereference(net->xfrm.nlsk); | |
1672 | if (nlsk) | |
1673 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1674 | rcu_read_unlock(); | |
1675 | return ret; | |
1676 | } | |
1677 | ||
1678 | static inline int xfrm_acquire_is_on(struct net *net) | |
1679 | { | |
1680 | struct sock *nlsk; | |
1681 | int ret = 0; | |
1682 | ||
1683 | rcu_read_lock(); | |
1684 | nlsk = rcu_dereference(net->xfrm.nlsk); | |
1685 | if (nlsk) | |
1686 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE); | |
1687 | rcu_read_unlock(); | |
1688 | ||
1689 | return ret; | |
1690 | } | |
1691 | #endif | |
1692 | ||
1693 | static inline int aead_len(struct xfrm_algo_aead *alg) | |
1694 | { | |
1695 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1696 | } | |
1697 | ||
1698 | static inline int xfrm_alg_len(const struct xfrm_algo *alg) | |
1699 | { | |
1700 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1701 | } | |
1702 | ||
1703 | static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) | |
1704 | { | |
1705 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1706 | } | |
1707 | ||
1708 | static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) | |
1709 | { | |
1710 | return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); | |
1711 | } | |
1712 | ||
1713 | #ifdef CONFIG_XFRM_MIGRATE | |
1714 | static inline int xfrm_replay_clone(struct xfrm_state *x, | |
1715 | struct xfrm_state *orig) | |
1716 | { | |
1717 | x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), | |
1718 | GFP_KERNEL); | |
1719 | if (!x->replay_esn) | |
1720 | return -ENOMEM; | |
1721 | ||
1722 | x->replay_esn->bmp_len = orig->replay_esn->bmp_len; | |
1723 | x->replay_esn->replay_window = orig->replay_esn->replay_window; | |
1724 | ||
1725 | x->preplay_esn = kmemdup(x->replay_esn, | |
1726 | xfrm_replay_state_esn_len(x->replay_esn), | |
1727 | GFP_KERNEL); | |
1728 | if (!x->preplay_esn) { | |
1729 | kfree(x->replay_esn); | |
1730 | return -ENOMEM; | |
1731 | } | |
1732 | ||
1733 | return 0; | |
1734 | } | |
1735 | ||
1736 | static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig) | |
1737 | { | |
1738 | return kmemdup(orig, aead_len(orig), GFP_KERNEL); | |
1739 | } | |
1740 | ||
1741 | ||
1742 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) | |
1743 | { | |
1744 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); | |
1745 | } | |
1746 | ||
1747 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) | |
1748 | { | |
1749 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); | |
1750 | } | |
1751 | ||
1752 | static inline void xfrm_states_put(struct xfrm_state **states, int n) | |
1753 | { | |
1754 | int i; | |
1755 | for (i = 0; i < n; i++) | |
1756 | xfrm_state_put(*(states + i)); | |
1757 | } | |
1758 | ||
1759 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1760 | { | |
1761 | int i; | |
1762 | for (i = 0; i < n; i++) | |
1763 | xfrm_state_delete(*(states + i)); | |
1764 | } | |
1765 | #endif | |
1766 | ||
1767 | #ifdef CONFIG_XFRM | |
1768 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) | |
1769 | { | |
1770 | return skb->sp->xvec[skb->sp->len - 1]; | |
1771 | } | |
1772 | #endif | |
1773 | ||
1774 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) | |
1775 | { | |
1776 | if (attrs[XFRMA_MARK]) | |
1777 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); | |
1778 | else | |
1779 | m->v = m->m = 0; | |
1780 | ||
1781 | return m->v & m->m; | |
1782 | } | |
1783 | ||
1784 | static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) | |
1785 | { | |
1786 | int ret = 0; | |
1787 | ||
1788 | if (m->m | m->v) | |
1789 | ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); | |
1790 | return ret; | |
1791 | } | |
1792 | ||
1793 | static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, | |
1794 | unsigned int family) | |
1795 | { | |
1796 | bool tunnel = false; | |
1797 | ||
1798 | switch(family) { | |
1799 | case AF_INET: | |
1800 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) | |
1801 | tunnel = true; | |
1802 | break; | |
1803 | case AF_INET6: | |
1804 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) | |
1805 | tunnel = true; | |
1806 | break; | |
1807 | } | |
1808 | if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL)) | |
1809 | return -EINVAL; | |
1810 | ||
1811 | return 0; | |
1812 | } | |
1813 | #endif /* _NET_XFRM_H */ |