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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 | extern struct mutex xfrm_cfg_mutex; |
57 | |
58 | /* Organization of SPD aka "XFRM rules" |
59 | ------------------------------------ |
60 | |
61 | Basic objects: |
62 | - policy rule, struct xfrm_policy (=SPD entry) |
63 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) |
64 | - instance of a transformer, struct xfrm_state (=SA) |
65 | - template to clone xfrm_state, struct xfrm_tmpl |
66 | |
67 | SPD is plain linear list of xfrm_policy rules, ordered by priority. |
68 | (To be compatible with existing pfkeyv2 implementations, |
69 | many rules with priority of 0x7fffffff are allowed to exist and |
70 | such rules are ordered in an unpredictable way, thanks to bsd folks.) |
71 | |
72 | Lookup is plain linear search until the first match with selector. |
73 | |
74 | If "action" is "block", then we prohibit the flow, otherwise: |
75 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, |
76 | policy entry has list of up to XFRM_MAX_DEPTH transformations, |
77 | described by templates xfrm_tmpl. Each template is resolved |
78 | to a complete xfrm_state (see below) and we pack bundle of transformations |
79 | to a dst_entry returned to requestor. |
80 | |
81 | dst -. xfrm .-> xfrm_state #1 |
82 | |---. child .-> dst -. xfrm .-> xfrm_state #2 |
83 | |---. child .-> dst -. xfrm .-> xfrm_state #3 |
84 | |---. child .-> NULL |
85 | |
86 | Bundles are cached at xrfm_policy struct (field ->bundles). |
87 | |
88 | |
89 | Resolution of xrfm_tmpl |
90 | ----------------------- |
91 | Template contains: |
92 | 1. ->mode Mode: transport or tunnel |
93 | 2. ->id.proto Protocol: AH/ESP/IPCOMP |
94 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. |
95 | Q: allow to resolve security gateway? |
96 | 4. ->id.spi If not zero, static SPI. |
97 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. |
98 | 6. ->algos List of allowed algos. Plain bitmask now. |
99 | Q: ealgos, aalgos, calgos. What a mess... |
100 | 7. ->share Sharing mode. |
101 | Q: how to implement private sharing mode? To add struct sock* to |
102 | flow id? |
103 | |
104 | Having this template we search through SAD searching for entries |
105 | with appropriate mode/proto/algo, permitted by selector. |
106 | If no appropriate entry found, it is requested from key manager. |
107 | |
108 | PROBLEMS: |
109 | Q: How to find all the bundles referring to a physical path for |
110 | PMTU discovery? Seems, dst should contain list of all parents... |
111 | and enter to infinite locking hierarchy disaster. |
112 | No! It is easier, we will not search for them, let them find us. |
113 | We add genid to each dst plus pointer to genid of raw IP route, |
114 | pmtu disc will update pmtu on raw IP route and increase its genid. |
115 | dst_check() will see this for top level and trigger resyncing |
116 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. |
117 | */ |
118 | |
119 | struct xfrm_state_walk { |
120 | struct list_head all; |
121 | u8 state; |
122 | union { |
123 | u8 dying; |
124 | u8 proto; |
125 | }; |
126 | u32 seq; |
127 | }; |
128 | |
129 | /* Full description of state of transformer. */ |
130 | struct xfrm_state { |
131 | #ifdef CONFIG_NET_NS |
132 | struct net *xs_net; |
133 | #endif |
134 | union { |
135 | struct hlist_node gclist; |
136 | struct hlist_node bydst; |
137 | }; |
138 | struct hlist_node bysrc; |
139 | struct hlist_node byspi; |
140 | |
141 | atomic_t refcnt; |
142 | spinlock_t lock; |
143 | |
144 | struct xfrm_id id; |
145 | struct xfrm_selector sel; |
146 | struct xfrm_mark mark; |
147 | u32 tfcpad; |
148 | |
149 | u32 genid; |
150 | |
151 | /* Key manager bits */ |
152 | struct xfrm_state_walk km; |
153 | |
154 | /* Parameters of this state. */ |
155 | struct { |
156 | u32 reqid; |
157 | u8 mode; |
158 | u8 replay_window; |
159 | u8 aalgo, ealgo, calgo; |
160 | u8 flags; |
161 | u16 family; |
162 | xfrm_address_t saddr; |
163 | int header_len; |
164 | int trailer_len; |
165 | u32 extra_flags; |
166 | } props; |
167 | |
168 | struct xfrm_lifetime_cfg lft; |
169 | |
170 | /* Data for transformer */ |
171 | struct xfrm_algo_auth *aalg; |
172 | struct xfrm_algo *ealg; |
173 | struct xfrm_algo *calg; |
174 | struct xfrm_algo_aead *aead; |
175 | |
176 | /* Data for encapsulator */ |
177 | struct xfrm_encap_tmpl *encap; |
178 | |
179 | /* Data for care-of address */ |
180 | xfrm_address_t *coaddr; |
181 | |
182 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
183 | struct xfrm_state *tunnel; |
184 | |
185 | /* If a tunnel, number of users + 1 */ |
186 | atomic_t tunnel_users; |
187 | |
188 | /* State for replay detection */ |
189 | struct xfrm_replay_state replay; |
190 | struct xfrm_replay_state_esn *replay_esn; |
191 | |
192 | /* Replay detection state at the time we sent the last notification */ |
193 | struct xfrm_replay_state preplay; |
194 | struct xfrm_replay_state_esn *preplay_esn; |
195 | |
196 | /* The functions for replay detection. */ |
197 | struct xfrm_replay *repl; |
198 | |
199 | /* internal flag that only holds state for delayed aevent at the |
200 | * moment |
201 | */ |
202 | u32 xflags; |
203 | |
204 | /* Replay detection notification settings */ |
205 | u32 replay_maxage; |
206 | u32 replay_maxdiff; |
207 | |
208 | /* Replay detection notification timer */ |
209 | struct timer_list rtimer; |
210 | |
211 | /* Statistics */ |
212 | struct xfrm_stats stats; |
213 | |
214 | struct xfrm_lifetime_cur curlft; |
215 | struct tasklet_hrtimer mtimer; |
216 | |
217 | /* used to fix curlft->add_time when changing date */ |
218 | long saved_tmo; |
219 | |
220 | /* Last used time */ |
221 | unsigned long lastused; |
222 | |
223 | /* Reference to data common to all the instances of this |
224 | * transformer. */ |
225 | const struct xfrm_type *type; |
226 | struct xfrm_mode *inner_mode; |
227 | struct xfrm_mode *inner_mode_iaf; |
228 | struct xfrm_mode *outer_mode; |
229 | |
230 | /* Security context */ |
231 | struct xfrm_sec_ctx *security; |
232 | |
233 | /* Private data of this transformer, format is opaque, |
234 | * interpreted by xfrm_type methods. */ |
235 | void *data; |
236 | }; |
237 | |
238 | static inline struct net *xs_net(struct xfrm_state *x) |
239 | { |
240 | return read_pnet(&x->xs_net); |
241 | } |
242 | |
243 | /* xflags - make enum if more show up */ |
244 | #define XFRM_TIME_DEFER 1 |
245 | #define XFRM_SOFT_EXPIRE 2 |
246 | |
247 | enum { |
248 | XFRM_STATE_VOID, |
249 | XFRM_STATE_ACQ, |
250 | XFRM_STATE_VALID, |
251 | XFRM_STATE_ERROR, |
252 | XFRM_STATE_EXPIRED, |
253 | XFRM_STATE_DEAD |
254 | }; |
255 | |
256 | /* callback structure passed from either netlink or pfkey */ |
257 | struct km_event { |
258 | union { |
259 | u32 hard; |
260 | u32 proto; |
261 | u32 byid; |
262 | u32 aevent; |
263 | u32 type; |
264 | } data; |
265 | |
266 | u32 seq; |
267 | u32 portid; |
268 | u32 event; |
269 | struct net *net; |
270 | }; |
271 | |
272 | struct xfrm_replay { |
273 | void (*advance)(struct xfrm_state *x, __be32 net_seq); |
274 | int (*check)(struct xfrm_state *x, |
275 | struct sk_buff *skb, |
276 | __be32 net_seq); |
277 | int (*recheck)(struct xfrm_state *x, |
278 | struct sk_buff *skb, |
279 | __be32 net_seq); |
280 | void (*notify)(struct xfrm_state *x, int event); |
281 | int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); |
282 | }; |
283 | |
284 | struct net_device; |
285 | struct xfrm_type; |
286 | struct xfrm_dst; |
287 | struct xfrm_policy_afinfo { |
288 | unsigned short family; |
289 | struct dst_ops *dst_ops; |
290 | void (*garbage_collect)(struct net *net); |
291 | struct dst_entry *(*dst_lookup)(struct net *net, int tos, |
292 | const xfrm_address_t *saddr, |
293 | const xfrm_address_t *daddr); |
294 | int (*get_saddr)(struct net *net, xfrm_address_t *saddr, 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 | void (*init_dst)(struct net *net, |
300 | struct xfrm_dst *dst); |
301 | int (*init_path)(struct xfrm_dst *path, |
302 | struct dst_entry *dst, |
303 | int nfheader_len); |
304 | int (*fill_dst)(struct xfrm_dst *xdst, |
305 | struct net_device *dev, |
306 | const struct flowi *fl); |
307 | struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); |
308 | }; |
309 | |
310 | extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); |
311 | extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); |
312 | extern void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c); |
313 | extern void km_state_notify(struct xfrm_state *x, const struct km_event *c); |
314 | |
315 | struct xfrm_tmpl; |
316 | extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
317 | extern void km_state_expired(struct xfrm_state *x, int hard, u32 portid); |
318 | extern 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 sk_buff *skb); |
337 | int (*output_finish)(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 | extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); |
348 | extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); |
349 | extern struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); |
350 | extern void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); |
351 | |
352 | extern void xfrm_state_delete_tunnel(struct xfrm_state *x); |
353 | |
354 | struct xfrm_type { |
355 | char *description; |
356 | struct module *owner; |
357 | u8 proto; |
358 | u8 flags; |
359 | #define XFRM_TYPE_NON_FRAGMENT 1 |
360 | #define XFRM_TYPE_REPLAY_PROT 2 |
361 | #define XFRM_TYPE_LOCAL_COADDR 4 |
362 | #define XFRM_TYPE_REMOTE_COADDR 8 |
363 | |
364 | int (*init_state)(struct xfrm_state *x); |
365 | void (*destructor)(struct xfrm_state *); |
366 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
367 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
368 | int (*reject)(struct xfrm_state *, struct sk_buff *, |
369 | const struct flowi *); |
370 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
371 | /* Estimate maximal size of result of transformation of a dgram */ |
372 | u32 (*get_mtu)(struct xfrm_state *, int size); |
373 | }; |
374 | |
375 | extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
376 | extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); |
377 | |
378 | struct xfrm_mode { |
379 | /* |
380 | * Remove encapsulation header. |
381 | * |
382 | * The IP header will be moved over the top of the encapsulation |
383 | * header. |
384 | * |
385 | * On entry, the transport header shall point to where the IP header |
386 | * should be and the network header shall be set to where the IP |
387 | * header currently is. skb->data shall point to the start of the |
388 | * payload. |
389 | */ |
390 | int (*input2)(struct xfrm_state *x, struct sk_buff *skb); |
391 | |
392 | /* |
393 | * This is the actual input entry point. |
394 | * |
395 | * For transport mode and equivalent this would be identical to |
396 | * input2 (which does not need to be set). While tunnel mode |
397 | * and equivalent would set this to the tunnel encapsulation function |
398 | * xfrm4_prepare_input that would in turn call input2. |
399 | */ |
400 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); |
401 | |
402 | /* |
403 | * Add encapsulation header. |
404 | * |
405 | * On exit, the transport header will be set to the start of the |
406 | * encapsulation header to be filled in by x->type->output and |
407 | * the mac header will be set to the nextheader (protocol for |
408 | * IPv4) field of the extension header directly preceding the |
409 | * encapsulation header, or in its absence, that of the top IP |
410 | * header. The value of the network header will always point |
411 | * to the top IP header while skb->data will point to the payload. |
412 | */ |
413 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); |
414 | |
415 | /* |
416 | * This is the actual output entry point. |
417 | * |
418 | * For transport mode and equivalent this would be identical to |
419 | * output2 (which does not need to be set). While tunnel mode |
420 | * and equivalent would set this to a tunnel encapsulation function |
421 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn |
422 | * call output2. |
423 | */ |
424 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); |
425 | |
426 | struct xfrm_state_afinfo *afinfo; |
427 | struct module *owner; |
428 | unsigned int encap; |
429 | int flags; |
430 | }; |
431 | |
432 | /* Flags for xfrm_mode. */ |
433 | enum { |
434 | XFRM_MODE_FLAG_TUNNEL = 1, |
435 | }; |
436 | |
437 | extern int xfrm_register_mode(struct xfrm_mode *mode, int family); |
438 | extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); |
439 | |
440 | static inline int xfrm_af2proto(unsigned int family) |
441 | { |
442 | switch(family) { |
443 | case AF_INET: |
444 | return IPPROTO_IPIP; |
445 | case AF_INET6: |
446 | return IPPROTO_IPV6; |
447 | default: |
448 | return 0; |
449 | } |
450 | } |
451 | |
452 | static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) |
453 | { |
454 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || |
455 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) |
456 | return x->inner_mode; |
457 | else |
458 | return x->inner_mode_iaf; |
459 | } |
460 | |
461 | struct xfrm_tmpl { |
462 | /* id in template is interpreted as: |
463 | * daddr - destination of tunnel, may be zero for transport mode. |
464 | * spi - zero to acquire spi. Not zero if spi is static, then |
465 | * daddr must be fixed too. |
466 | * proto - AH/ESP/IPCOMP |
467 | */ |
468 | struct xfrm_id id; |
469 | |
470 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ |
471 | xfrm_address_t saddr; |
472 | |
473 | unsigned short encap_family; |
474 | |
475 | u32 reqid; |
476 | |
477 | /* Mode: transport, tunnel etc. */ |
478 | u8 mode; |
479 | |
480 | /* Sharing mode: unique, this session only, this user only etc. */ |
481 | u8 share; |
482 | |
483 | /* May skip this transfomration if no SA is found */ |
484 | u8 optional; |
485 | |
486 | /* Skip aalgos/ealgos/calgos checks. */ |
487 | u8 allalgs; |
488 | |
489 | /* Bit mask of algos allowed for acquisition */ |
490 | u32 aalgos; |
491 | u32 ealgos; |
492 | u32 calgos; |
493 | }; |
494 | |
495 | #define XFRM_MAX_DEPTH 6 |
496 | |
497 | struct xfrm_policy_walk_entry { |
498 | struct list_head all; |
499 | u8 dead; |
500 | }; |
501 | |
502 | struct xfrm_policy_walk { |
503 | struct xfrm_policy_walk_entry walk; |
504 | u8 type; |
505 | u32 seq; |
506 | }; |
507 | |
508 | struct xfrm_policy_queue { |
509 | struct sk_buff_head hold_queue; |
510 | struct timer_list hold_timer; |
511 | unsigned long timeout; |
512 | }; |
513 | |
514 | struct xfrm_policy { |
515 | #ifdef CONFIG_NET_NS |
516 | struct net *xp_net; |
517 | #endif |
518 | struct hlist_node bydst; |
519 | struct hlist_node byidx; |
520 | |
521 | /* This lock only affects elements except for entry. */ |
522 | rwlock_t lock; |
523 | atomic_t refcnt; |
524 | struct timer_list timer; |
525 | |
526 | struct flow_cache_object flo; |
527 | atomic_t genid; |
528 | u32 priority; |
529 | u32 index; |
530 | struct xfrm_mark mark; |
531 | struct xfrm_selector selector; |
532 | struct xfrm_lifetime_cfg lft; |
533 | struct xfrm_lifetime_cur curlft; |
534 | struct xfrm_policy_walk_entry walk; |
535 | struct xfrm_policy_queue polq; |
536 | u8 type; |
537 | u8 action; |
538 | u8 flags; |
539 | u8 xfrm_nr; |
540 | u16 family; |
541 | struct xfrm_sec_ctx *security; |
542 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
543 | }; |
544 | |
545 | static inline struct net *xp_net(const struct xfrm_policy *xp) |
546 | { |
547 | return read_pnet(&xp->xp_net); |
548 | } |
549 | |
550 | struct xfrm_kmaddress { |
551 | xfrm_address_t local; |
552 | xfrm_address_t remote; |
553 | u32 reserved; |
554 | u16 family; |
555 | }; |
556 | |
557 | struct xfrm_migrate { |
558 | xfrm_address_t old_daddr; |
559 | xfrm_address_t old_saddr; |
560 | xfrm_address_t new_daddr; |
561 | xfrm_address_t new_saddr; |
562 | u8 proto; |
563 | u8 mode; |
564 | u16 reserved; |
565 | u32 reqid; |
566 | u16 old_family; |
567 | u16 new_family; |
568 | }; |
569 | |
570 | #define XFRM_KM_TIMEOUT 30 |
571 | /* what happened */ |
572 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR |
573 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE |
574 | |
575 | /* default aevent timeout in units of 100ms */ |
576 | #define XFRM_AE_ETIME 10 |
577 | /* Async Event timer multiplier */ |
578 | #define XFRM_AE_ETH_M 10 |
579 | /* default seq threshold size */ |
580 | #define XFRM_AE_SEQT_SIZE 2 |
581 | |
582 | struct xfrm_mgr { |
583 | struct list_head list; |
584 | char *id; |
585 | int (*notify)(struct xfrm_state *x, const struct km_event *c); |
586 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); |
587 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
588 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
589 | int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); |
590 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
591 | int (*migrate)(const struct xfrm_selector *sel, |
592 | u8 dir, u8 type, |
593 | const struct xfrm_migrate *m, |
594 | int num_bundles, |
595 | const struct xfrm_kmaddress *k); |
596 | }; |
597 | |
598 | extern int xfrm_register_km(struct xfrm_mgr *km); |
599 | extern int xfrm_unregister_km(struct xfrm_mgr *km); |
600 | |
601 | /* |
602 | * This structure is used for the duration where packets are being |
603 | * transformed by IPsec. As soon as the packet leaves IPsec the |
604 | * area beyond the generic IP part may be overwritten. |
605 | */ |
606 | struct xfrm_skb_cb { |
607 | union { |
608 | struct inet_skb_parm h4; |
609 | struct inet6_skb_parm h6; |
610 | } header; |
611 | |
612 | /* Sequence number for replay protection. */ |
613 | union { |
614 | struct { |
615 | __u32 low; |
616 | __u32 hi; |
617 | } output; |
618 | struct { |
619 | __be32 low; |
620 | __be32 hi; |
621 | } input; |
622 | } seq; |
623 | }; |
624 | |
625 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) |
626 | |
627 | /* |
628 | * This structure is used by the afinfo prepare_input/prepare_output functions |
629 | * to transmit header information to the mode input/output functions. |
630 | */ |
631 | struct xfrm_mode_skb_cb { |
632 | union { |
633 | struct inet_skb_parm h4; |
634 | struct inet6_skb_parm h6; |
635 | } header; |
636 | |
637 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ |
638 | __be16 id; |
639 | __be16 frag_off; |
640 | |
641 | /* IP header length (excluding options or extension headers). */ |
642 | u8 ihl; |
643 | |
644 | /* TOS for IPv4, class for IPv6. */ |
645 | u8 tos; |
646 | |
647 | /* TTL for IPv4, hop limitfor IPv6. */ |
648 | u8 ttl; |
649 | |
650 | /* Protocol for IPv4, NH for IPv6. */ |
651 | u8 protocol; |
652 | |
653 | /* Option length for IPv4, zero for IPv6. */ |
654 | u8 optlen; |
655 | |
656 | /* Used by IPv6 only, zero for IPv4. */ |
657 | u8 flow_lbl[3]; |
658 | }; |
659 | |
660 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) |
661 | |
662 | /* |
663 | * This structure is used by the input processing to locate the SPI and |
664 | * related information. |
665 | */ |
666 | struct xfrm_spi_skb_cb { |
667 | union { |
668 | struct inet_skb_parm h4; |
669 | struct inet6_skb_parm h6; |
670 | } header; |
671 | |
672 | unsigned int daddroff; |
673 | unsigned int family; |
674 | }; |
675 | |
676 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) |
677 | |
678 | /* Audit Information */ |
679 | struct xfrm_audit { |
680 | u32 secid; |
681 | kuid_t loginuid; |
682 | u32 sessionid; |
683 | }; |
684 | |
685 | #ifdef CONFIG_AUDITSYSCALL |
686 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
687 | { |
688 | struct audit_buffer *audit_buf = NULL; |
689 | |
690 | if (audit_enabled == 0) |
691 | return NULL; |
692 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, |
693 | AUDIT_MAC_IPSEC_EVENT); |
694 | if (audit_buf == NULL) |
695 | return NULL; |
696 | audit_log_format(audit_buf, "op=%s", op); |
697 | return audit_buf; |
698 | } |
699 | |
700 | static inline void xfrm_audit_helper_usrinfo(kuid_t auid, u32 ses, u32 secid, |
701 | struct audit_buffer *audit_buf) |
702 | { |
703 | char *secctx; |
704 | u32 secctx_len; |
705 | |
706 | audit_log_format(audit_buf, " auid=%u ses=%u", |
707 | from_kuid(&init_user_ns, auid), ses); |
708 | if (secid != 0 && |
709 | security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { |
710 | audit_log_format(audit_buf, " subj=%s", secctx); |
711 | security_release_secctx(secctx, secctx_len); |
712 | } else |
713 | audit_log_task_context(audit_buf); |
714 | } |
715 | |
716 | extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, |
717 | kuid_t auid, u32 ses, u32 secid); |
718 | extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
719 | kuid_t auid, u32 ses, u32 secid); |
720 | extern void xfrm_audit_state_add(struct xfrm_state *x, int result, |
721 | kuid_t auid, u32 ses, u32 secid); |
722 | extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
723 | kuid_t auid, u32 ses, u32 secid); |
724 | extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
725 | struct sk_buff *skb); |
726 | extern void xfrm_audit_state_replay(struct xfrm_state *x, |
727 | struct sk_buff *skb, __be32 net_seq); |
728 | extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); |
729 | extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, |
730 | __be32 net_spi, __be32 net_seq); |
731 | extern void xfrm_audit_state_icvfail(struct xfrm_state *x, |
732 | struct sk_buff *skb, u8 proto); |
733 | #else |
734 | |
735 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, |
736 | kuid_t auid, u32 ses, u32 secid) |
737 | { |
738 | } |
739 | |
740 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
741 | kuid_t auid, u32 ses, u32 secid) |
742 | { |
743 | } |
744 | |
745 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, |
746 | kuid_t auid, u32 ses, u32 secid) |
747 | { |
748 | } |
749 | |
750 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
751 | kuid_t auid, u32 ses, u32 secid) |
752 | { |
753 | } |
754 | |
755 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
756 | struct sk_buff *skb) |
757 | { |
758 | } |
759 | |
760 | static inline void xfrm_audit_state_replay(struct xfrm_state *x, |
761 | struct sk_buff *skb, __be32 net_seq) |
762 | { |
763 | } |
764 | |
765 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, |
766 | u16 family) |
767 | { |
768 | } |
769 | |
770 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, |
771 | __be32 net_spi, __be32 net_seq) |
772 | { |
773 | } |
774 | |
775 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, |
776 | struct sk_buff *skb, u8 proto) |
777 | { |
778 | } |
779 | #endif /* CONFIG_AUDITSYSCALL */ |
780 | |
781 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
782 | { |
783 | if (likely(policy != NULL)) |
784 | atomic_inc(&policy->refcnt); |
785 | } |
786 | |
787 | extern void xfrm_policy_destroy(struct xfrm_policy *policy); |
788 | |
789 | static inline void xfrm_pol_put(struct xfrm_policy *policy) |
790 | { |
791 | if (atomic_dec_and_test(&policy->refcnt)) |
792 | xfrm_policy_destroy(policy); |
793 | } |
794 | |
795 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
796 | { |
797 | int i; |
798 | for (i = npols - 1; i >= 0; --i) |
799 | xfrm_pol_put(pols[i]); |
800 | } |
801 | |
802 | extern void __xfrm_state_destroy(struct xfrm_state *); |
803 | |
804 | static inline void __xfrm_state_put(struct xfrm_state *x) |
805 | { |
806 | atomic_dec(&x->refcnt); |
807 | } |
808 | |
809 | static inline void xfrm_state_put(struct xfrm_state *x) |
810 | { |
811 | if (atomic_dec_and_test(&x->refcnt)) |
812 | __xfrm_state_destroy(x); |
813 | } |
814 | |
815 | static inline void xfrm_state_hold(struct xfrm_state *x) |
816 | { |
817 | atomic_inc(&x->refcnt); |
818 | } |
819 | |
820 | static inline bool addr_match(const void *token1, const void *token2, |
821 | int prefixlen) |
822 | { |
823 | const __be32 *a1 = token1; |
824 | const __be32 *a2 = token2; |
825 | int pdw; |
826 | int pbi; |
827 | |
828 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
829 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
830 | |
831 | if (pdw) |
832 | if (memcmp(a1, a2, pdw << 2)) |
833 | return false; |
834 | |
835 | if (pbi) { |
836 | __be32 mask; |
837 | |
838 | mask = htonl((0xffffffff) << (32 - pbi)); |
839 | |
840 | if ((a1[pdw] ^ a2[pdw]) & mask) |
841 | return false; |
842 | } |
843 | |
844 | return true; |
845 | } |
846 | |
847 | static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) |
848 | { |
849 | /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ |
850 | if (prefixlen == 0) |
851 | return true; |
852 | return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen))); |
853 | } |
854 | |
855 | static __inline__ |
856 | __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) |
857 | { |
858 | __be16 port; |
859 | switch(fl->flowi_proto) { |
860 | case IPPROTO_TCP: |
861 | case IPPROTO_UDP: |
862 | case IPPROTO_UDPLITE: |
863 | case IPPROTO_SCTP: |
864 | port = uli->ports.sport; |
865 | break; |
866 | case IPPROTO_ICMP: |
867 | case IPPROTO_ICMPV6: |
868 | port = htons(uli->icmpt.type); |
869 | break; |
870 | case IPPROTO_MH: |
871 | port = htons(uli->mht.type); |
872 | break; |
873 | case IPPROTO_GRE: |
874 | port = htons(ntohl(uli->gre_key) >> 16); |
875 | break; |
876 | default: |
877 | port = 0; /*XXX*/ |
878 | } |
879 | return port; |
880 | } |
881 | |
882 | static __inline__ |
883 | __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) |
884 | { |
885 | __be16 port; |
886 | switch(fl->flowi_proto) { |
887 | case IPPROTO_TCP: |
888 | case IPPROTO_UDP: |
889 | case IPPROTO_UDPLITE: |
890 | case IPPROTO_SCTP: |
891 | port = uli->ports.dport; |
892 | break; |
893 | case IPPROTO_ICMP: |
894 | case IPPROTO_ICMPV6: |
895 | port = htons(uli->icmpt.code); |
896 | break; |
897 | case IPPROTO_GRE: |
898 | port = htons(ntohl(uli->gre_key) & 0xffff); |
899 | break; |
900 | default: |
901 | port = 0; /*XXX*/ |
902 | } |
903 | return port; |
904 | } |
905 | |
906 | extern bool xfrm_selector_match(const struct xfrm_selector *sel, |
907 | const struct flowi *fl, |
908 | 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 | extern 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 | extern 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 | extern 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((struct in6_addr *)&addr->a6); |
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 | extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); |
1063 | |
1064 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
1065 | struct sk_buff *skb, |
1066 | unsigned int family, int reverse) |
1067 | { |
1068 | struct net *net = dev_net(skb->dev); |
1069 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
1070 | |
1071 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
1072 | return __xfrm_policy_check(sk, ndir, skb, family); |
1073 | |
1074 | return (!net->xfrm.policy_count[dir] && !skb->sp) || |
1075 | (skb_dst(skb)->flags & DST_NOPOLICY) || |
1076 | __xfrm_policy_check(sk, ndir, skb, family); |
1077 | } |
1078 | |
1079 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) |
1080 | { |
1081 | return __xfrm_policy_check2(sk, dir, skb, family, 0); |
1082 | } |
1083 | |
1084 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
1085 | { |
1086 | return xfrm_policy_check(sk, dir, skb, AF_INET); |
1087 | } |
1088 | |
1089 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
1090 | { |
1091 | return xfrm_policy_check(sk, dir, skb, AF_INET6); |
1092 | } |
1093 | |
1094 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1095 | struct sk_buff *skb) |
1096 | { |
1097 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); |
1098 | } |
1099 | |
1100 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, |
1101 | struct sk_buff *skb) |
1102 | { |
1103 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); |
1104 | } |
1105 | |
1106 | extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, |
1107 | unsigned int family, int reverse); |
1108 | |
1109 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, |
1110 | unsigned int family) |
1111 | { |
1112 | return __xfrm_decode_session(skb, fl, family, 0); |
1113 | } |
1114 | |
1115 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
1116 | struct flowi *fl, |
1117 | unsigned int family) |
1118 | { |
1119 | return __xfrm_decode_session(skb, fl, family, 1); |
1120 | } |
1121 | |
1122 | extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
1123 | |
1124 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) |
1125 | { |
1126 | struct net *net = dev_net(skb->dev); |
1127 | |
1128 | return !net->xfrm.policy_count[XFRM_POLICY_OUT] || |
1129 | (skb_dst(skb)->flags & DST_NOXFRM) || |
1130 | __xfrm_route_forward(skb, family); |
1131 | } |
1132 | |
1133 | static inline int xfrm4_route_forward(struct sk_buff *skb) |
1134 | { |
1135 | return xfrm_route_forward(skb, AF_INET); |
1136 | } |
1137 | |
1138 | static inline int xfrm6_route_forward(struct sk_buff *skb) |
1139 | { |
1140 | return xfrm_route_forward(skb, AF_INET6); |
1141 | } |
1142 | |
1143 | extern int __xfrm_sk_clone_policy(struct sock *sk); |
1144 | |
1145 | static inline int xfrm_sk_clone_policy(struct sock *sk) |
1146 | { |
1147 | if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) |
1148 | return __xfrm_sk_clone_policy(sk); |
1149 | return 0; |
1150 | } |
1151 | |
1152 | extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1153 | |
1154 | static inline void xfrm_sk_free_policy(struct sock *sk) |
1155 | { |
1156 | if (unlikely(sk->sk_policy[0] != NULL)) { |
1157 | xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); |
1158 | sk->sk_policy[0] = NULL; |
1159 | } |
1160 | if (unlikely(sk->sk_policy[1] != NULL)) { |
1161 | xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); |
1162 | sk->sk_policy[1] = NULL; |
1163 | } |
1164 | } |
1165 | |
1166 | extern void xfrm_garbage_collect(struct net *net); |
1167 | |
1168 | #else |
1169 | |
1170 | static inline void xfrm_sk_free_policy(struct sock *sk) {} |
1171 | static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } |
1172 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } |
1173 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } |
1174 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
1175 | { |
1176 | return 1; |
1177 | } |
1178 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
1179 | { |
1180 | return 1; |
1181 | } |
1182 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) |
1183 | { |
1184 | return 1; |
1185 | } |
1186 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
1187 | struct flowi *fl, |
1188 | unsigned int family) |
1189 | { |
1190 | return -ENOSYS; |
1191 | } |
1192 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1193 | struct sk_buff *skb) |
1194 | { |
1195 | return 1; |
1196 | } |
1197 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, |
1198 | struct sk_buff *skb) |
1199 | { |
1200 | return 1; |
1201 | } |
1202 | static inline void xfrm_garbage_collect(struct net *net) |
1203 | { |
1204 | } |
1205 | #endif |
1206 | |
1207 | static __inline__ |
1208 | xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) |
1209 | { |
1210 | switch (family){ |
1211 | case AF_INET: |
1212 | return (xfrm_address_t *)&fl->u.ip4.daddr; |
1213 | case AF_INET6: |
1214 | return (xfrm_address_t *)&fl->u.ip6.daddr; |
1215 | } |
1216 | return NULL; |
1217 | } |
1218 | |
1219 | static __inline__ |
1220 | xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) |
1221 | { |
1222 | switch (family){ |
1223 | case AF_INET: |
1224 | return (xfrm_address_t *)&fl->u.ip4.saddr; |
1225 | case AF_INET6: |
1226 | return (xfrm_address_t *)&fl->u.ip6.saddr; |
1227 | } |
1228 | return NULL; |
1229 | } |
1230 | |
1231 | static __inline__ |
1232 | void xfrm_flowi_addr_get(const struct flowi *fl, |
1233 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
1234 | unsigned short family) |
1235 | { |
1236 | switch(family) { |
1237 | case AF_INET: |
1238 | memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); |
1239 | memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); |
1240 | break; |
1241 | case AF_INET6: |
1242 | *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr; |
1243 | *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr; |
1244 | break; |
1245 | } |
1246 | } |
1247 | |
1248 | static __inline__ int |
1249 | __xfrm4_state_addr_check(const struct xfrm_state *x, |
1250 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) |
1251 | { |
1252 | if (daddr->a4 == x->id.daddr.a4 && |
1253 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) |
1254 | return 1; |
1255 | return 0; |
1256 | } |
1257 | |
1258 | static __inline__ int |
1259 | __xfrm6_state_addr_check(const struct xfrm_state *x, |
1260 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) |
1261 | { |
1262 | if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && |
1263 | (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || |
1264 | ipv6_addr_any((struct in6_addr *)saddr) || |
1265 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) |
1266 | return 1; |
1267 | return 0; |
1268 | } |
1269 | |
1270 | static __inline__ int |
1271 | xfrm_state_addr_check(const struct xfrm_state *x, |
1272 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
1273 | unsigned short family) |
1274 | { |
1275 | switch (family) { |
1276 | case AF_INET: |
1277 | return __xfrm4_state_addr_check(x, daddr, saddr); |
1278 | case AF_INET6: |
1279 | return __xfrm6_state_addr_check(x, daddr, saddr); |
1280 | } |
1281 | return 0; |
1282 | } |
1283 | |
1284 | static __inline__ int |
1285 | xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, |
1286 | unsigned short family) |
1287 | { |
1288 | switch (family) { |
1289 | case AF_INET: |
1290 | return __xfrm4_state_addr_check(x, |
1291 | (const xfrm_address_t *)&fl->u.ip4.daddr, |
1292 | (const xfrm_address_t *)&fl->u.ip4.saddr); |
1293 | case AF_INET6: |
1294 | return __xfrm6_state_addr_check(x, |
1295 | (const xfrm_address_t *)&fl->u.ip6.daddr, |
1296 | (const xfrm_address_t *)&fl->u.ip6.saddr); |
1297 | } |
1298 | return 0; |
1299 | } |
1300 | |
1301 | static inline int xfrm_state_kern(const struct xfrm_state *x) |
1302 | { |
1303 | return atomic_read(&x->tunnel_users); |
1304 | } |
1305 | |
1306 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1307 | { |
1308 | return (!userproto || proto == userproto || |
1309 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || |
1310 | proto == IPPROTO_ESP || |
1311 | proto == IPPROTO_COMP))); |
1312 | } |
1313 | |
1314 | /* |
1315 | * xfrm algorithm information |
1316 | */ |
1317 | struct xfrm_algo_aead_info { |
1318 | u16 icv_truncbits; |
1319 | }; |
1320 | |
1321 | struct xfrm_algo_auth_info { |
1322 | u16 icv_truncbits; |
1323 | u16 icv_fullbits; |
1324 | }; |
1325 | |
1326 | struct xfrm_algo_encr_info { |
1327 | u16 blockbits; |
1328 | u16 defkeybits; |
1329 | }; |
1330 | |
1331 | struct xfrm_algo_comp_info { |
1332 | u16 threshold; |
1333 | }; |
1334 | |
1335 | struct xfrm_algo_desc { |
1336 | char *name; |
1337 | char *compat; |
1338 | u8 available:1; |
1339 | u8 pfkey_supported:1; |
1340 | union { |
1341 | struct xfrm_algo_aead_info aead; |
1342 | struct xfrm_algo_auth_info auth; |
1343 | struct xfrm_algo_encr_info encr; |
1344 | struct xfrm_algo_comp_info comp; |
1345 | } uinfo; |
1346 | struct sadb_alg desc; |
1347 | }; |
1348 | |
1349 | /* XFRM tunnel handlers. */ |
1350 | struct xfrm_tunnel { |
1351 | int (*handler)(struct sk_buff *skb); |
1352 | int (*err_handler)(struct sk_buff *skb, u32 info); |
1353 | |
1354 | struct xfrm_tunnel __rcu *next; |
1355 | int priority; |
1356 | }; |
1357 | |
1358 | struct xfrm6_tunnel { |
1359 | int (*handler)(struct sk_buff *skb); |
1360 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, |
1361 | u8 type, u8 code, int offset, __be32 info); |
1362 | struct xfrm6_tunnel __rcu *next; |
1363 | int priority; |
1364 | }; |
1365 | |
1366 | extern void xfrm_init(void); |
1367 | extern void xfrm4_init(void); |
1368 | extern int xfrm_state_init(struct net *net); |
1369 | extern void xfrm_state_fini(struct net *net); |
1370 | extern void xfrm4_state_init(void); |
1371 | #ifdef CONFIG_XFRM |
1372 | extern int xfrm6_init(void); |
1373 | extern void xfrm6_fini(void); |
1374 | extern int xfrm6_state_init(void); |
1375 | extern void xfrm6_state_fini(void); |
1376 | #else |
1377 | static inline int xfrm6_init(void) |
1378 | { |
1379 | return 0; |
1380 | } |
1381 | static inline void xfrm6_fini(void) |
1382 | { |
1383 | ; |
1384 | } |
1385 | #endif |
1386 | |
1387 | #ifdef CONFIG_XFRM_STATISTICS |
1388 | extern int xfrm_proc_init(struct net *net); |
1389 | extern void xfrm_proc_fini(struct net *net); |
1390 | #endif |
1391 | |
1392 | extern int xfrm_sysctl_init(struct net *net); |
1393 | #ifdef CONFIG_SYSCTL |
1394 | extern void xfrm_sysctl_fini(struct net *net); |
1395 | #else |
1396 | static inline void xfrm_sysctl_fini(struct net *net) |
1397 | { |
1398 | } |
1399 | #endif |
1400 | |
1401 | extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); |
1402 | extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
1403 | int (*func)(struct xfrm_state *, int, void*), void *); |
1404 | extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); |
1405 | extern struct xfrm_state *xfrm_state_alloc(struct net *net); |
1406 | extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, |
1407 | const xfrm_address_t *saddr, |
1408 | const struct flowi *fl, |
1409 | struct xfrm_tmpl *tmpl, |
1410 | struct xfrm_policy *pol, int *err, |
1411 | unsigned short family); |
1412 | extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, |
1413 | xfrm_address_t *daddr, |
1414 | xfrm_address_t *saddr, |
1415 | unsigned short family, |
1416 | u8 mode, u8 proto, u32 reqid); |
1417 | extern int xfrm_state_check_expire(struct xfrm_state *x); |
1418 | extern void xfrm_state_insert(struct xfrm_state *x); |
1419 | extern int xfrm_state_add(struct xfrm_state *x); |
1420 | extern int xfrm_state_update(struct xfrm_state *x); |
1421 | extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, |
1422 | const xfrm_address_t *daddr, __be32 spi, |
1423 | u8 proto, unsigned short family); |
1424 | extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
1425 | const xfrm_address_t *daddr, |
1426 | const xfrm_address_t *saddr, |
1427 | u8 proto, |
1428 | unsigned short family); |
1429 | #ifdef CONFIG_XFRM_SUB_POLICY |
1430 | extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, |
1431 | int n, unsigned short family); |
1432 | extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, |
1433 | int n, unsigned short family); |
1434 | #else |
1435 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, |
1436 | int n, unsigned short family) |
1437 | { |
1438 | return -ENOSYS; |
1439 | } |
1440 | |
1441 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, |
1442 | int n, unsigned short family) |
1443 | { |
1444 | return -ENOSYS; |
1445 | } |
1446 | #endif |
1447 | |
1448 | struct xfrmk_sadinfo { |
1449 | u32 sadhcnt; /* current hash bkts */ |
1450 | u32 sadhmcnt; /* max allowed hash bkts */ |
1451 | u32 sadcnt; /* current running count */ |
1452 | }; |
1453 | |
1454 | struct xfrmk_spdinfo { |
1455 | u32 incnt; |
1456 | u32 outcnt; |
1457 | u32 fwdcnt; |
1458 | u32 inscnt; |
1459 | u32 outscnt; |
1460 | u32 fwdscnt; |
1461 | u32 spdhcnt; |
1462 | u32 spdhmcnt; |
1463 | }; |
1464 | |
1465 | extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, |
1466 | u32 seq); |
1467 | extern int xfrm_state_delete(struct xfrm_state *x); |
1468 | extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); |
1469 | extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); |
1470 | extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); |
1471 | extern u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); |
1472 | extern int xfrm_init_replay(struct xfrm_state *x); |
1473 | extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); |
1474 | extern int __xfrm_init_state(struct xfrm_state *x, bool init_replay); |
1475 | extern int xfrm_init_state(struct xfrm_state *x); |
1476 | extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); |
1477 | extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, |
1478 | int encap_type); |
1479 | extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); |
1480 | extern int xfrm_output_resume(struct sk_buff *skb, int err); |
1481 | extern int xfrm_output(struct sk_buff *skb); |
1482 | extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1483 | extern void xfrm_local_error(struct sk_buff *skb, int mtu); |
1484 | extern int xfrm4_extract_header(struct sk_buff *skb); |
1485 | extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
1486 | extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
1487 | int encap_type); |
1488 | extern int xfrm4_transport_finish(struct sk_buff *skb, int async); |
1489 | extern int xfrm4_rcv(struct sk_buff *skb); |
1490 | |
1491 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) |
1492 | { |
1493 | return xfrm4_rcv_encap(skb, nexthdr, spi, 0); |
1494 | } |
1495 | |
1496 | extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1497 | extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); |
1498 | extern int xfrm4_output(struct sk_buff *skb); |
1499 | extern int xfrm4_output_finish(struct sk_buff *skb); |
1500 | extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1501 | extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); |
1502 | extern int xfrm4_mode_tunnel_input_register(struct xfrm_tunnel *handler); |
1503 | extern int xfrm4_mode_tunnel_input_deregister(struct xfrm_tunnel *handler); |
1504 | extern void xfrm4_local_error(struct sk_buff *skb, u32 mtu); |
1505 | extern int xfrm6_extract_header(struct sk_buff *skb); |
1506 | extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
1507 | extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); |
1508 | extern int xfrm6_transport_finish(struct sk_buff *skb, int async); |
1509 | extern int xfrm6_rcv(struct sk_buff *skb); |
1510 | extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, |
1511 | xfrm_address_t *saddr, u8 proto); |
1512 | extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
1513 | extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); |
1514 | extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
1515 | extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); |
1516 | extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1517 | extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); |
1518 | extern int xfrm6_output(struct sk_buff *skb); |
1519 | extern int xfrm6_output_finish(struct sk_buff *skb); |
1520 | extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
1521 | u8 **prevhdr); |
1522 | extern void xfrm6_local_error(struct sk_buff *skb, u32 mtu); |
1523 | |
1524 | #ifdef CONFIG_XFRM |
1525 | extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1526 | extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); |
1527 | #else |
1528 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
1529 | { |
1530 | return -ENOPROTOOPT; |
1531 | } |
1532 | |
1533 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) |
1534 | { |
1535 | /* should not happen */ |
1536 | kfree_skb(skb); |
1537 | return 0; |
1538 | } |
1539 | #endif |
1540 | |
1541 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
1542 | |
1543 | extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
1544 | extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, |
1545 | int (*func)(struct xfrm_policy *, int, int, void*), void *); |
1546 | extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); |
1547 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
1548 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, |
1549 | u8 type, int dir, |
1550 | struct xfrm_selector *sel, |
1551 | struct xfrm_sec_ctx *ctx, int delete, |
1552 | int *err); |
1553 | struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err); |
1554 | int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); |
1555 | u32 xfrm_get_acqseq(void); |
1556 | extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
1557 | struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, |
1558 | u8 mode, u32 reqid, u8 proto, |
1559 | const xfrm_address_t *daddr, |
1560 | const xfrm_address_t *saddr, int create, |
1561 | unsigned short family); |
1562 | extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
1563 | |
1564 | #ifdef CONFIG_XFRM_MIGRATE |
1565 | extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1566 | const struct xfrm_migrate *m, int num_bundles, |
1567 | const struct xfrm_kmaddress *k); |
1568 | extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); |
1569 | extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, |
1570 | struct xfrm_migrate *m); |
1571 | extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1572 | struct xfrm_migrate *m, int num_bundles, |
1573 | struct xfrm_kmaddress *k); |
1574 | #endif |
1575 | |
1576 | extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
1577 | extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); |
1578 | extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
1579 | |
1580 | extern void xfrm_input_init(void); |
1581 | extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); |
1582 | |
1583 | extern void xfrm_probe_algs(void); |
1584 | extern int xfrm_count_pfkey_auth_supported(void); |
1585 | extern int xfrm_count_pfkey_enc_supported(void); |
1586 | extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); |
1587 | extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); |
1588 | extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); |
1589 | extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); |
1590 | extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); |
1591 | extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); |
1592 | extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); |
1593 | extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); |
1594 | extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, |
1595 | int probe); |
1596 | |
1597 | static inline bool xfrm6_addr_equal(const xfrm_address_t *a, |
1598 | const xfrm_address_t *b) |
1599 | { |
1600 | return ipv6_addr_equal((const struct in6_addr *)a, |
1601 | (const struct in6_addr *)b); |
1602 | } |
1603 | |
1604 | static inline bool xfrm_addr_equal(const xfrm_address_t *a, |
1605 | const xfrm_address_t *b, |
1606 | sa_family_t family) |
1607 | { |
1608 | switch (family) { |
1609 | default: |
1610 | case AF_INET: |
1611 | return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; |
1612 | case AF_INET6: |
1613 | return xfrm6_addr_equal(a, b); |
1614 | } |
1615 | } |
1616 | |
1617 | static inline int xfrm_policy_id2dir(u32 index) |
1618 | { |
1619 | return index & 7; |
1620 | } |
1621 | |
1622 | #ifdef CONFIG_XFRM |
1623 | static inline int xfrm_aevent_is_on(struct net *net) |
1624 | { |
1625 | struct sock *nlsk; |
1626 | int ret = 0; |
1627 | |
1628 | rcu_read_lock(); |
1629 | nlsk = rcu_dereference(net->xfrm.nlsk); |
1630 | if (nlsk) |
1631 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); |
1632 | rcu_read_unlock(); |
1633 | return ret; |
1634 | } |
1635 | #endif |
1636 | |
1637 | static inline int xfrm_alg_len(const struct xfrm_algo *alg) |
1638 | { |
1639 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); |
1640 | } |
1641 | |
1642 | static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) |
1643 | { |
1644 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); |
1645 | } |
1646 | |
1647 | static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) |
1648 | { |
1649 | return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); |
1650 | } |
1651 | |
1652 | #ifdef CONFIG_XFRM_MIGRATE |
1653 | static inline int xfrm_replay_clone(struct xfrm_state *x, |
1654 | struct xfrm_state *orig) |
1655 | { |
1656 | x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), |
1657 | GFP_KERNEL); |
1658 | if (!x->replay_esn) |
1659 | return -ENOMEM; |
1660 | |
1661 | x->replay_esn->bmp_len = orig->replay_esn->bmp_len; |
1662 | x->replay_esn->replay_window = orig->replay_esn->replay_window; |
1663 | |
1664 | x->preplay_esn = kmemdup(x->replay_esn, |
1665 | xfrm_replay_state_esn_len(x->replay_esn), |
1666 | GFP_KERNEL); |
1667 | if (!x->preplay_esn) { |
1668 | kfree(x->replay_esn); |
1669 | return -ENOMEM; |
1670 | } |
1671 | |
1672 | return 0; |
1673 | } |
1674 | |
1675 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
1676 | { |
1677 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
1678 | } |
1679 | |
1680 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
1681 | { |
1682 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); |
1683 | } |
1684 | |
1685 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
1686 | { |
1687 | int i; |
1688 | for (i = 0; i < n; i++) |
1689 | xfrm_state_put(*(states + i)); |
1690 | } |
1691 | |
1692 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) |
1693 | { |
1694 | int i; |
1695 | for (i = 0; i < n; i++) |
1696 | xfrm_state_delete(*(states + i)); |
1697 | } |
1698 | #endif |
1699 | |
1700 | #ifdef CONFIG_XFRM |
1701 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
1702 | { |
1703 | return skb->sp->xvec[skb->sp->len - 1]; |
1704 | } |
1705 | #endif |
1706 | |
1707 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
1708 | { |
1709 | if (attrs[XFRMA_MARK]) |
1710 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
1711 | else |
1712 | m->v = m->m = 0; |
1713 | |
1714 | return m->v & m->m; |
1715 | } |
1716 | |
1717 | static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) |
1718 | { |
1719 | int ret = 0; |
1720 | |
1721 | if (m->m | m->v) |
1722 | ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); |
1723 | return ret; |
1724 | } |
1725 | |
1726 | #endif /* _NET_XFRM_H */ |
1727 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9