1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _NET_XFRM_H |
3 | #define _NET_XFRM_H |
4 | |
5 | #include <linux/compiler.h> |
6 | #include <linux/xfrm.h> |
7 | #include <linux/spinlock.h> |
8 | #include <linux/list.h> |
9 | #include <linux/skbuff.h> |
10 | #include <linux/socket.h> |
11 | #include <linux/pfkeyv2.h> |
12 | #include <linux/ipsec.h> |
13 | #include <linux/in6.h> |
14 | #include <linux/mutex.h> |
15 | #include <linux/audit.h> |
16 | #include <linux/slab.h> |
17 | #include <linux/refcount.h> |
18 | #include <linux/sockptr.h> |
19 | |
20 | #include <net/sock.h> |
21 | #include <net/dst.h> |
22 | #include <net/ip.h> |
23 | #include <net/route.h> |
24 | #include <net/ipv6.h> |
25 | #include <net/ip6_fib.h> |
26 | #include <net/flow.h> |
27 | #include <net/gro_cells.h> |
28 | |
29 | #include <linux/interrupt.h> |
30 | |
31 | #ifdef CONFIG_XFRM_STATISTICS |
32 | #include <net/snmp.h> |
33 | #endif |
34 | |
35 | #define XFRM_PROTO_ESP 50 |
36 | #define XFRM_PROTO_AH 51 |
37 | #define XFRM_PROTO_COMP 108 |
38 | #define XFRM_PROTO_IPIP 4 |
39 | #define XFRM_PROTO_IPV6 41 |
40 | #define XFRM_PROTO_ROUTING IPPROTO_ROUTING |
41 | #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS |
42 | |
43 | #define XFRM_ALIGN4(len) (((len) + 3) & ~3) |
44 | #define XFRM_ALIGN8(len) (((len) + 7) & ~7) |
45 | #define MODULE_ALIAS_XFRM_MODE(family, encap) \ |
46 | MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) |
47 | #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ |
48 | MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) |
49 | #define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \ |
50 | MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto)) |
51 | |
52 | #ifdef CONFIG_XFRM_STATISTICS |
53 | #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) |
54 | #else |
55 | #define XFRM_INC_STATS(net, field) ((void)(net)) |
56 | #endif |
57 | |
58 | |
59 | /* Organization of SPD aka "XFRM rules" |
60 | ------------------------------------ |
61 | |
62 | Basic objects: |
63 | - policy rule, struct xfrm_policy (=SPD entry) |
64 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) |
65 | - instance of a transformer, struct xfrm_state (=SA) |
66 | - template to clone xfrm_state, struct xfrm_tmpl |
67 | |
68 | SPD is plain linear list of xfrm_policy rules, ordered by priority. |
69 | (To be compatible with existing pfkeyv2 implementations, |
70 | many rules with priority of 0x7fffffff are allowed to exist and |
71 | such rules are ordered in an unpredictable way, thanks to bsd folks.) |
72 | |
73 | Lookup is plain linear search until the first match with selector. |
74 | |
75 | If "action" is "block", then we prohibit the flow, otherwise: |
76 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, |
77 | policy entry has list of up to XFRM_MAX_DEPTH transformations, |
78 | described by templates xfrm_tmpl. Each template is resolved |
79 | to a complete xfrm_state (see below) and we pack bundle of transformations |
80 | to a dst_entry returned to requestor. |
81 | |
82 | dst -. xfrm .-> xfrm_state #1 |
83 | |---. child .-> dst -. xfrm .-> xfrm_state #2 |
84 | |---. child .-> dst -. xfrm .-> xfrm_state #3 |
85 | |---. child .-> NULL |
86 | |
87 | Bundles are cached at xrfm_policy struct (field ->bundles). |
88 | |
89 | |
90 | Resolution of xrfm_tmpl |
91 | ----------------------- |
92 | Template contains: |
93 | 1. ->mode Mode: transport or tunnel |
94 | 2. ->id.proto Protocol: AH/ESP/IPCOMP |
95 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. |
96 | Q: allow to resolve security gateway? |
97 | 4. ->id.spi If not zero, static SPI. |
98 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. |
99 | 6. ->algos List of allowed algos. Plain bitmask now. |
100 | Q: ealgos, aalgos, calgos. What a mess... |
101 | 7. ->share Sharing mode. |
102 | Q: how to implement private sharing mode? To add struct sock* to |
103 | flow id? |
104 | |
105 | Having this template we search through SAD searching for entries |
106 | with appropriate mode/proto/algo, permitted by selector. |
107 | If no appropriate entry found, it is requested from key manager. |
108 | |
109 | PROBLEMS: |
110 | Q: How to find all the bundles referring to a physical path for |
111 | PMTU discovery? Seems, dst should contain list of all parents... |
112 | and enter to infinite locking hierarchy disaster. |
113 | No! It is easier, we will not search for them, let them find us. |
114 | We add genid to each dst plus pointer to genid of raw IP route, |
115 | pmtu disc will update pmtu on raw IP route and increase its genid. |
116 | dst_check() will see this for top level and trigger resyncing |
117 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. |
118 | */ |
119 | |
120 | struct xfrm_state_walk { |
121 | struct list_head all; |
122 | u8 state; |
123 | u8 dying; |
124 | u8 proto; |
125 | u32 seq; |
126 | struct xfrm_address_filter *filter; |
127 | }; |
128 | |
129 | enum { |
130 | XFRM_DEV_OFFLOAD_IN = 1, |
131 | XFRM_DEV_OFFLOAD_OUT, |
132 | XFRM_DEV_OFFLOAD_FWD, |
133 | }; |
134 | |
135 | enum { |
136 | XFRM_DEV_OFFLOAD_UNSPECIFIED, |
137 | XFRM_DEV_OFFLOAD_CRYPTO, |
138 | XFRM_DEV_OFFLOAD_PACKET, |
139 | }; |
140 | |
141 | enum { |
142 | XFRM_DEV_OFFLOAD_FLAG_ACQ = 1, |
143 | }; |
144 | |
145 | struct xfrm_dev_offload { |
146 | struct net_device *dev; |
147 | netdevice_tracker dev_tracker; |
148 | struct net_device *real_dev; |
149 | unsigned long offload_handle; |
150 | u8 dir : 2; |
151 | u8 type : 2; |
152 | u8 flags : 2; |
153 | }; |
154 | |
155 | struct xfrm_mode { |
156 | u8 encap; |
157 | u8 family; |
158 | u8 flags; |
159 | }; |
160 | |
161 | /* Flags for xfrm_mode. */ |
162 | enum { |
163 | XFRM_MODE_FLAG_TUNNEL = 1, |
164 | }; |
165 | |
166 | enum xfrm_replay_mode { |
167 | XFRM_REPLAY_MODE_LEGACY, |
168 | XFRM_REPLAY_MODE_BMP, |
169 | XFRM_REPLAY_MODE_ESN, |
170 | }; |
171 | |
172 | /* Full description of state of transformer. */ |
173 | struct xfrm_state { |
174 | possible_net_t xs_net; |
175 | union { |
176 | struct hlist_node gclist; |
177 | struct hlist_node bydst; |
178 | }; |
179 | struct hlist_node bysrc; |
180 | struct hlist_node byspi; |
181 | struct hlist_node byseq; |
182 | |
183 | refcount_t refcnt; |
184 | spinlock_t lock; |
185 | |
186 | struct xfrm_id id; |
187 | struct xfrm_selector sel; |
188 | struct xfrm_mark mark; |
189 | u32 if_id; |
190 | u32 tfcpad; |
191 | |
192 | u32 genid; |
193 | |
194 | /* Key manager bits */ |
195 | struct xfrm_state_walk km; |
196 | |
197 | /* Parameters of this state. */ |
198 | struct { |
199 | u32 reqid; |
200 | u8 mode; |
201 | u8 replay_window; |
202 | u8 aalgo, ealgo, calgo; |
203 | u8 flags; |
204 | u16 family; |
205 | xfrm_address_t saddr; |
206 | int ; |
207 | int trailer_len; |
208 | u32 ; |
209 | struct xfrm_mark smark; |
210 | } props; |
211 | |
212 | struct xfrm_lifetime_cfg lft; |
213 | |
214 | /* Data for transformer */ |
215 | struct xfrm_algo_auth *aalg; |
216 | struct xfrm_algo *ealg; |
217 | struct xfrm_algo *calg; |
218 | struct xfrm_algo_aead *aead; |
219 | const char *geniv; |
220 | |
221 | /* mapping change rate limiting */ |
222 | __be16 new_mapping_sport; |
223 | u32 new_mapping; /* seconds */ |
224 | u32 mapping_maxage; /* seconds for input SA */ |
225 | |
226 | /* Data for encapsulator */ |
227 | struct xfrm_encap_tmpl *encap; |
228 | struct sock __rcu *encap_sk; |
229 | |
230 | /* Data for care-of address */ |
231 | xfrm_address_t *coaddr; |
232 | |
233 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
234 | struct xfrm_state *tunnel; |
235 | |
236 | /* If a tunnel, number of users + 1 */ |
237 | atomic_t tunnel_users; |
238 | |
239 | /* State for replay detection */ |
240 | struct xfrm_replay_state replay; |
241 | struct xfrm_replay_state_esn *replay_esn; |
242 | |
243 | /* Replay detection state at the time we sent the last notification */ |
244 | struct xfrm_replay_state preplay; |
245 | struct xfrm_replay_state_esn *preplay_esn; |
246 | |
247 | /* replay detection mode */ |
248 | enum xfrm_replay_mode repl_mode; |
249 | /* internal flag that only holds state for delayed aevent at the |
250 | * moment |
251 | */ |
252 | u32 xflags; |
253 | |
254 | /* Replay detection notification settings */ |
255 | u32 replay_maxage; |
256 | u32 replay_maxdiff; |
257 | |
258 | /* Replay detection notification timer */ |
259 | struct timer_list rtimer; |
260 | |
261 | /* Statistics */ |
262 | struct xfrm_stats stats; |
263 | |
264 | struct xfrm_lifetime_cur curlft; |
265 | struct hrtimer mtimer; |
266 | |
267 | struct xfrm_dev_offload xso; |
268 | |
269 | /* used to fix curlft->add_time when changing date */ |
270 | long saved_tmo; |
271 | |
272 | /* Last used time */ |
273 | time64_t lastused; |
274 | |
275 | struct page_frag xfrag; |
276 | |
277 | /* Reference to data common to all the instances of this |
278 | * transformer. */ |
279 | const struct xfrm_type *type; |
280 | struct xfrm_mode inner_mode; |
281 | struct xfrm_mode inner_mode_iaf; |
282 | struct xfrm_mode outer_mode; |
283 | |
284 | const struct xfrm_type_offload *type_offload; |
285 | |
286 | /* Security context */ |
287 | struct xfrm_sec_ctx *security; |
288 | |
289 | /* Private data of this transformer, format is opaque, |
290 | * interpreted by xfrm_type methods. */ |
291 | void *data; |
292 | }; |
293 | |
294 | static inline struct net *xs_net(struct xfrm_state *x) |
295 | { |
296 | return read_pnet(pnet: &x->xs_net); |
297 | } |
298 | |
299 | /* xflags - make enum if more show up */ |
300 | #define XFRM_TIME_DEFER 1 |
301 | #define XFRM_SOFT_EXPIRE 2 |
302 | |
303 | enum { |
304 | XFRM_STATE_VOID, |
305 | XFRM_STATE_ACQ, |
306 | XFRM_STATE_VALID, |
307 | XFRM_STATE_ERROR, |
308 | XFRM_STATE_EXPIRED, |
309 | XFRM_STATE_DEAD |
310 | }; |
311 | |
312 | /* callback structure passed from either netlink or pfkey */ |
313 | struct km_event { |
314 | union { |
315 | u32 hard; |
316 | u32 proto; |
317 | u32 byid; |
318 | u32 aevent; |
319 | u32 type; |
320 | } data; |
321 | |
322 | u32 seq; |
323 | u32 portid; |
324 | u32 event; |
325 | struct net *net; |
326 | }; |
327 | |
328 | struct xfrm_if_decode_session_result { |
329 | struct net *net; |
330 | u32 if_id; |
331 | }; |
332 | |
333 | struct xfrm_if_cb { |
334 | bool (*decode_session)(struct sk_buff *skb, |
335 | unsigned short family, |
336 | struct xfrm_if_decode_session_result *res); |
337 | }; |
338 | |
339 | void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb); |
340 | void xfrm_if_unregister_cb(void); |
341 | |
342 | struct net_device; |
343 | struct xfrm_type; |
344 | struct xfrm_dst; |
345 | struct xfrm_policy_afinfo { |
346 | struct dst_ops *dst_ops; |
347 | struct dst_entry *(*dst_lookup)(struct net *net, |
348 | int tos, int oif, |
349 | const xfrm_address_t *saddr, |
350 | const xfrm_address_t *daddr, |
351 | u32 mark); |
352 | int (*get_saddr)(struct net *net, int oif, |
353 | xfrm_address_t *saddr, |
354 | xfrm_address_t *daddr, |
355 | u32 mark); |
356 | int (*fill_dst)(struct xfrm_dst *xdst, |
357 | struct net_device *dev, |
358 | const struct flowi *fl); |
359 | struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); |
360 | }; |
361 | |
362 | int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family); |
363 | void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo); |
364 | void km_policy_notify(struct xfrm_policy *xp, int dir, |
365 | const struct km_event *c); |
366 | void km_state_notify(struct xfrm_state *x, const struct km_event *c); |
367 | |
368 | struct xfrm_tmpl; |
369 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, |
370 | struct xfrm_policy *pol); |
371 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); |
372 | int __xfrm_state_delete(struct xfrm_state *x); |
373 | |
374 | struct xfrm_state_afinfo { |
375 | u8 family; |
376 | u8 proto; |
377 | |
378 | const struct xfrm_type_offload *type_offload_esp; |
379 | |
380 | const struct xfrm_type *type_esp; |
381 | const struct xfrm_type *type_ipip; |
382 | const struct xfrm_type *type_ipip6; |
383 | const struct xfrm_type *type_comp; |
384 | const struct xfrm_type *type_ah; |
385 | const struct xfrm_type *type_routing; |
386 | const struct xfrm_type *type_dstopts; |
387 | |
388 | int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb); |
389 | int (*transport_finish)(struct sk_buff *skb, |
390 | int async); |
391 | void (*local_error)(struct sk_buff *skb, u32 mtu); |
392 | }; |
393 | |
394 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); |
395 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); |
396 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); |
397 | struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family); |
398 | |
399 | struct xfrm_input_afinfo { |
400 | u8 family; |
401 | bool is_ipip; |
402 | int (*callback)(struct sk_buff *skb, u8 protocol, |
403 | int err); |
404 | }; |
405 | |
406 | int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo); |
407 | int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo); |
408 | |
409 | void xfrm_flush_gc(void); |
410 | void xfrm_state_delete_tunnel(struct xfrm_state *x); |
411 | |
412 | struct xfrm_type { |
413 | struct module *owner; |
414 | u8 proto; |
415 | u8 flags; |
416 | #define XFRM_TYPE_NON_FRAGMENT 1 |
417 | #define XFRM_TYPE_REPLAY_PROT 2 |
418 | #define XFRM_TYPE_LOCAL_COADDR 4 |
419 | #define XFRM_TYPE_REMOTE_COADDR 8 |
420 | |
421 | int (*init_state)(struct xfrm_state *x, |
422 | struct netlink_ext_ack *extack); |
423 | void (*destructor)(struct xfrm_state *); |
424 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
425 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
426 | int (*reject)(struct xfrm_state *, struct sk_buff *, |
427 | const struct flowi *); |
428 | }; |
429 | |
430 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
431 | void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); |
432 | |
433 | struct xfrm_type_offload { |
434 | struct module *owner; |
435 | u8 proto; |
436 | void (*encap)(struct xfrm_state *, struct sk_buff *pskb); |
437 | int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb); |
438 | int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features); |
439 | }; |
440 | |
441 | int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family); |
442 | void xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family); |
443 | |
444 | static inline int xfrm_af2proto(unsigned int family) |
445 | { |
446 | switch(family) { |
447 | case AF_INET: |
448 | return IPPROTO_IPIP; |
449 | case AF_INET6: |
450 | return IPPROTO_IPV6; |
451 | default: |
452 | return 0; |
453 | } |
454 | } |
455 | |
456 | static inline const struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) |
457 | { |
458 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || |
459 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) |
460 | return &x->inner_mode; |
461 | else |
462 | return &x->inner_mode_iaf; |
463 | } |
464 | |
465 | struct xfrm_tmpl { |
466 | /* id in template is interpreted as: |
467 | * daddr - destination of tunnel, may be zero for transport mode. |
468 | * spi - zero to acquire spi. Not zero if spi is static, then |
469 | * daddr must be fixed too. |
470 | * proto - AH/ESP/IPCOMP |
471 | */ |
472 | struct xfrm_id id; |
473 | |
474 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ |
475 | xfrm_address_t saddr; |
476 | |
477 | unsigned short encap_family; |
478 | |
479 | u32 reqid; |
480 | |
481 | /* Mode: transport, tunnel etc. */ |
482 | u8 mode; |
483 | |
484 | /* Sharing mode: unique, this session only, this user only etc. */ |
485 | u8 share; |
486 | |
487 | /* May skip this transfomration if no SA is found */ |
488 | u8 optional; |
489 | |
490 | /* Skip aalgos/ealgos/calgos checks. */ |
491 | u8 allalgs; |
492 | |
493 | /* Bit mask of algos allowed for acquisition */ |
494 | u32 aalgos; |
495 | u32 ealgos; |
496 | u32 calgos; |
497 | }; |
498 | |
499 | #define XFRM_MAX_DEPTH 6 |
500 | #define XFRM_MAX_OFFLOAD_DEPTH 1 |
501 | |
502 | struct xfrm_policy_walk_entry { |
503 | struct list_head all; |
504 | u8 dead; |
505 | }; |
506 | |
507 | struct xfrm_policy_walk { |
508 | struct xfrm_policy_walk_entry walk; |
509 | u8 type; |
510 | u32 seq; |
511 | }; |
512 | |
513 | struct xfrm_policy_queue { |
514 | struct sk_buff_head hold_queue; |
515 | struct timer_list hold_timer; |
516 | unsigned long timeout; |
517 | }; |
518 | |
519 | struct xfrm_policy { |
520 | possible_net_t xp_net; |
521 | struct hlist_node bydst; |
522 | struct hlist_node byidx; |
523 | |
524 | /* This lock only affects elements except for entry. */ |
525 | rwlock_t lock; |
526 | refcount_t refcnt; |
527 | u32 pos; |
528 | struct timer_list timer; |
529 | |
530 | atomic_t genid; |
531 | u32 priority; |
532 | u32 index; |
533 | u32 if_id; |
534 | struct xfrm_mark mark; |
535 | struct xfrm_selector selector; |
536 | struct xfrm_lifetime_cfg lft; |
537 | struct xfrm_lifetime_cur curlft; |
538 | struct xfrm_policy_walk_entry walk; |
539 | struct xfrm_policy_queue polq; |
540 | bool bydst_reinsert; |
541 | u8 type; |
542 | u8 action; |
543 | u8 flags; |
544 | u8 xfrm_nr; |
545 | u16 family; |
546 | struct xfrm_sec_ctx *security; |
547 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
548 | struct hlist_node bydst_inexact_list; |
549 | struct rcu_head rcu; |
550 | |
551 | struct xfrm_dev_offload xdo; |
552 | }; |
553 | |
554 | static inline struct net *xp_net(const struct xfrm_policy *xp) |
555 | { |
556 | return read_pnet(pnet: &xp->xp_net); |
557 | } |
558 | |
559 | struct xfrm_kmaddress { |
560 | xfrm_address_t local; |
561 | xfrm_address_t remote; |
562 | u32 reserved; |
563 | u16 family; |
564 | }; |
565 | |
566 | struct xfrm_migrate { |
567 | xfrm_address_t old_daddr; |
568 | xfrm_address_t old_saddr; |
569 | xfrm_address_t new_daddr; |
570 | xfrm_address_t new_saddr; |
571 | u8 proto; |
572 | u8 mode; |
573 | u16 reserved; |
574 | u32 reqid; |
575 | u16 old_family; |
576 | u16 new_family; |
577 | }; |
578 | |
579 | #define XFRM_KM_TIMEOUT 30 |
580 | /* what happened */ |
581 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR |
582 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE |
583 | |
584 | /* default aevent timeout in units of 100ms */ |
585 | #define XFRM_AE_ETIME 10 |
586 | /* Async Event timer multiplier */ |
587 | #define XFRM_AE_ETH_M 10 |
588 | /* default seq threshold size */ |
589 | #define XFRM_AE_SEQT_SIZE 2 |
590 | |
591 | struct xfrm_mgr { |
592 | struct list_head list; |
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 | const struct xfrm_encap_tmpl *encap); |
605 | bool (*is_alive)(const struct km_event *c); |
606 | }; |
607 | |
608 | void xfrm_register_km(struct xfrm_mgr *km); |
609 | void xfrm_unregister_km(struct xfrm_mgr *km); |
610 | |
611 | struct xfrm_tunnel_skb_cb { |
612 | union { |
613 | struct inet_skb_parm h4; |
614 | struct inet6_skb_parm h6; |
615 | } ; |
616 | |
617 | union { |
618 | struct ip_tunnel *ip4; |
619 | struct ip6_tnl *ip6; |
620 | } tunnel; |
621 | }; |
622 | |
623 | #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) |
624 | |
625 | /* |
626 | * This structure is used for the duration where packets are being |
627 | * transformed by IPsec. As soon as the packet leaves IPsec the |
628 | * area beyond the generic IP part may be overwritten. |
629 | */ |
630 | struct xfrm_skb_cb { |
631 | struct xfrm_tunnel_skb_cb ; |
632 | |
633 | /* Sequence number for replay protection. */ |
634 | union { |
635 | struct { |
636 | __u32 low; |
637 | __u32 hi; |
638 | } output; |
639 | struct { |
640 | __be32 low; |
641 | __be32 hi; |
642 | } input; |
643 | } seq; |
644 | }; |
645 | |
646 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) |
647 | |
648 | /* |
649 | * This structure is used by the afinfo prepare_input/prepare_output functions |
650 | * to transmit header information to the mode input/output functions. |
651 | */ |
652 | struct xfrm_mode_skb_cb { |
653 | struct xfrm_tunnel_skb_cb ; |
654 | |
655 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ |
656 | __be16 id; |
657 | __be16 frag_off; |
658 | |
659 | /* IP header length (excluding options or extension headers). */ |
660 | u8 ihl; |
661 | |
662 | /* TOS for IPv4, class for IPv6. */ |
663 | u8 tos; |
664 | |
665 | /* TTL for IPv4, hop limitfor IPv6. */ |
666 | u8 ttl; |
667 | |
668 | /* Protocol for IPv4, NH for IPv6. */ |
669 | u8 protocol; |
670 | |
671 | /* Option length for IPv4, zero for IPv6. */ |
672 | u8 optlen; |
673 | |
674 | /* Used by IPv6 only, zero for IPv4. */ |
675 | u8 flow_lbl[3]; |
676 | }; |
677 | |
678 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) |
679 | |
680 | /* |
681 | * This structure is used by the input processing to locate the SPI and |
682 | * related information. |
683 | */ |
684 | struct xfrm_spi_skb_cb { |
685 | struct xfrm_tunnel_skb_cb ; |
686 | |
687 | unsigned int daddroff; |
688 | unsigned int family; |
689 | __be32 seq; |
690 | }; |
691 | |
692 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) |
693 | |
694 | #ifdef CONFIG_AUDITSYSCALL |
695 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
696 | { |
697 | struct audit_buffer *audit_buf = NULL; |
698 | |
699 | if (audit_enabled == AUDIT_OFF) |
700 | return NULL; |
701 | audit_buf = audit_log_start(ctx: audit_context(), GFP_ATOMIC, |
702 | AUDIT_MAC_IPSEC_EVENT); |
703 | if (audit_buf == NULL) |
704 | return NULL; |
705 | audit_log_format(ab: audit_buf, fmt: "op=%s" , op); |
706 | return audit_buf; |
707 | } |
708 | |
709 | static inline void xfrm_audit_helper_usrinfo(bool task_valid, |
710 | struct audit_buffer *audit_buf) |
711 | { |
712 | const unsigned int auid = from_kuid(to: &init_user_ns, uid: task_valid ? |
713 | audit_get_loginuid(current) : |
714 | INVALID_UID); |
715 | const unsigned int ses = task_valid ? audit_get_sessionid(current) : |
716 | AUDIT_SID_UNSET; |
717 | |
718 | audit_log_format(ab: audit_buf, fmt: " auid=%u ses=%u" , auid, ses); |
719 | audit_log_task_context(ab: audit_buf); |
720 | } |
721 | |
722 | void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid); |
723 | void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
724 | bool task_valid); |
725 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid); |
726 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid); |
727 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
728 | struct sk_buff *skb); |
729 | void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, |
730 | __be32 net_seq); |
731 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); |
732 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, |
733 | __be32 net_seq); |
734 | void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, |
735 | u8 proto); |
736 | #else |
737 | |
738 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, |
739 | bool task_valid) |
740 | { |
741 | } |
742 | |
743 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
744 | bool task_valid) |
745 | { |
746 | } |
747 | |
748 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, |
749 | bool task_valid) |
750 | { |
751 | } |
752 | |
753 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
754 | bool task_valid) |
755 | { |
756 | } |
757 | |
758 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
759 | struct sk_buff *skb) |
760 | { |
761 | } |
762 | |
763 | static inline void xfrm_audit_state_replay(struct xfrm_state *x, |
764 | struct sk_buff *skb, __be32 net_seq) |
765 | { |
766 | } |
767 | |
768 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, |
769 | u16 family) |
770 | { |
771 | } |
772 | |
773 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, |
774 | __be32 net_spi, __be32 net_seq) |
775 | { |
776 | } |
777 | |
778 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, |
779 | struct sk_buff *skb, u8 proto) |
780 | { |
781 | } |
782 | #endif /* CONFIG_AUDITSYSCALL */ |
783 | |
784 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
785 | { |
786 | if (likely(policy != NULL)) |
787 | refcount_inc(r: &policy->refcnt); |
788 | } |
789 | |
790 | void xfrm_policy_destroy(struct xfrm_policy *policy); |
791 | |
792 | static inline void xfrm_pol_put(struct xfrm_policy *policy) |
793 | { |
794 | if (refcount_dec_and_test(r: &policy->refcnt)) |
795 | xfrm_policy_destroy(policy); |
796 | } |
797 | |
798 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
799 | { |
800 | int i; |
801 | for (i = npols - 1; i >= 0; --i) |
802 | xfrm_pol_put(policy: pols[i]); |
803 | } |
804 | |
805 | void __xfrm_state_destroy(struct xfrm_state *, bool); |
806 | |
807 | static inline void __xfrm_state_put(struct xfrm_state *x) |
808 | { |
809 | refcount_dec(r: &x->refcnt); |
810 | } |
811 | |
812 | static inline void xfrm_state_put(struct xfrm_state *x) |
813 | { |
814 | if (refcount_dec_and_test(r: &x->refcnt)) |
815 | __xfrm_state_destroy(x, false); |
816 | } |
817 | |
818 | static inline void xfrm_state_put_sync(struct xfrm_state *x) |
819 | { |
820 | if (refcount_dec_and_test(r: &x->refcnt)) |
821 | __xfrm_state_destroy(x, true); |
822 | } |
823 | |
824 | static inline void xfrm_state_hold(struct xfrm_state *x) |
825 | { |
826 | refcount_inc(r: &x->refcnt); |
827 | } |
828 | |
829 | static inline bool addr_match(const void *token1, const void *token2, |
830 | unsigned int prefixlen) |
831 | { |
832 | const __be32 *a1 = token1; |
833 | const __be32 *a2 = token2; |
834 | unsigned int pdw; |
835 | unsigned int pbi; |
836 | |
837 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
838 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
839 | |
840 | if (pdw) |
841 | if (memcmp(p: a1, q: a2, size: pdw << 2)) |
842 | return false; |
843 | |
844 | if (pbi) { |
845 | __be32 mask; |
846 | |
847 | mask = htonl((0xffffffff) << (32 - pbi)); |
848 | |
849 | if ((a1[pdw] ^ a2[pdw]) & mask) |
850 | return false; |
851 | } |
852 | |
853 | return true; |
854 | } |
855 | |
856 | static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) |
857 | { |
858 | /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ |
859 | if (sizeof(long) == 4 && prefixlen == 0) |
860 | return true; |
861 | return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen))); |
862 | } |
863 | |
864 | static __inline__ |
865 | __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) |
866 | { |
867 | __be16 port; |
868 | switch(fl->flowi_proto) { |
869 | case IPPROTO_TCP: |
870 | case IPPROTO_UDP: |
871 | case IPPROTO_UDPLITE: |
872 | case IPPROTO_SCTP: |
873 | port = uli->ports.sport; |
874 | break; |
875 | case IPPROTO_ICMP: |
876 | case IPPROTO_ICMPV6: |
877 | port = htons(uli->icmpt.type); |
878 | break; |
879 | case IPPROTO_MH: |
880 | port = htons(uli->mht.type); |
881 | break; |
882 | case IPPROTO_GRE: |
883 | port = htons(ntohl(uli->gre_key) >> 16); |
884 | break; |
885 | default: |
886 | port = 0; /*XXX*/ |
887 | } |
888 | return port; |
889 | } |
890 | |
891 | static __inline__ |
892 | __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) |
893 | { |
894 | __be16 port; |
895 | switch(fl->flowi_proto) { |
896 | case IPPROTO_TCP: |
897 | case IPPROTO_UDP: |
898 | case IPPROTO_UDPLITE: |
899 | case IPPROTO_SCTP: |
900 | port = uli->ports.dport; |
901 | break; |
902 | case IPPROTO_ICMP: |
903 | case IPPROTO_ICMPV6: |
904 | port = htons(uli->icmpt.code); |
905 | break; |
906 | case IPPROTO_GRE: |
907 | port = htons(ntohl(uli->gre_key) & 0xffff); |
908 | break; |
909 | default: |
910 | port = 0; /*XXX*/ |
911 | } |
912 | return port; |
913 | } |
914 | |
915 | bool xfrm_selector_match(const struct xfrm_selector *sel, |
916 | const struct flowi *fl, unsigned short family); |
917 | |
918 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
919 | /* If neither has a context --> match |
920 | * Otherwise, both must have a context and the sids, doi, alg must match |
921 | */ |
922 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
923 | { |
924 | return ((!s1 && !s2) || |
925 | (s1 && s2 && |
926 | (s1->ctx_sid == s2->ctx_sid) && |
927 | (s1->ctx_doi == s2->ctx_doi) && |
928 | (s1->ctx_alg == s2->ctx_alg))); |
929 | } |
930 | #else |
931 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
932 | { |
933 | return true; |
934 | } |
935 | #endif |
936 | |
937 | /* A struct encoding bundle of transformations to apply to some set of flow. |
938 | * |
939 | * xdst->child points to the next element of bundle. |
940 | * dst->xfrm points to an instanse of transformer. |
941 | * |
942 | * Due to unfortunate limitations of current routing cache, which we |
943 | * have no time to fix, it mirrors struct rtable and bound to the same |
944 | * routing key, including saddr,daddr. However, we can have many of |
945 | * bundles differing by session id. All the bundles grow from a parent |
946 | * policy rule. |
947 | */ |
948 | struct xfrm_dst { |
949 | union { |
950 | struct dst_entry dst; |
951 | struct rtable rt; |
952 | struct rt6_info rt6; |
953 | } u; |
954 | struct dst_entry *route; |
955 | struct dst_entry *child; |
956 | struct dst_entry *path; |
957 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; |
958 | int num_pols, num_xfrms; |
959 | u32 xfrm_genid; |
960 | u32 policy_genid; |
961 | u32 route_mtu_cached; |
962 | u32 child_mtu_cached; |
963 | u32 route_cookie; |
964 | u32 path_cookie; |
965 | }; |
966 | |
967 | static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst) |
968 | { |
969 | #ifdef CONFIG_XFRM |
970 | if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) { |
971 | const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst; |
972 | |
973 | return xdst->path; |
974 | } |
975 | #endif |
976 | return (struct dst_entry *) dst; |
977 | } |
978 | |
979 | static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst) |
980 | { |
981 | #ifdef CONFIG_XFRM |
982 | if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) { |
983 | struct xfrm_dst *xdst = (struct xfrm_dst *) dst; |
984 | return xdst->child; |
985 | } |
986 | #endif |
987 | return NULL; |
988 | } |
989 | |
990 | #ifdef CONFIG_XFRM |
991 | static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child) |
992 | { |
993 | xdst->child = child; |
994 | } |
995 | |
996 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
997 | { |
998 | xfrm_pols_put(pols: xdst->pols, npols: xdst->num_pols); |
999 | dst_release(dst: xdst->route); |
1000 | if (likely(xdst->u.dst.xfrm)) |
1001 | xfrm_state_put(x: xdst->u.dst.xfrm); |
1002 | } |
1003 | #endif |
1004 | |
1005 | void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); |
1006 | |
1007 | struct xfrm_if_parms { |
1008 | int link; /* ifindex of underlying L2 interface */ |
1009 | u32 if_id; /* interface identifyer */ |
1010 | bool collect_md; |
1011 | }; |
1012 | |
1013 | struct xfrm_if { |
1014 | struct xfrm_if __rcu *next; /* next interface in list */ |
1015 | struct net_device *dev; /* virtual device associated with interface */ |
1016 | struct net *net; /* netns for packet i/o */ |
1017 | struct xfrm_if_parms p; /* interface parms */ |
1018 | |
1019 | struct gro_cells gro_cells; |
1020 | }; |
1021 | |
1022 | struct xfrm_offload { |
1023 | /* Output sequence number for replay protection on offloading. */ |
1024 | struct { |
1025 | __u32 low; |
1026 | __u32 hi; |
1027 | } seq; |
1028 | |
1029 | __u32 flags; |
1030 | #define SA_DELETE_REQ 1 |
1031 | #define CRYPTO_DONE 2 |
1032 | #define CRYPTO_NEXT_DONE 4 |
1033 | #define CRYPTO_FALLBACK 8 |
1034 | #define XFRM_GSO_SEGMENT 16 |
1035 | #define XFRM_GRO 32 |
1036 | /* 64 is free */ |
1037 | #define XFRM_DEV_RESUME 128 |
1038 | #define XFRM_XMIT 256 |
1039 | |
1040 | __u32 status; |
1041 | #define CRYPTO_SUCCESS 1 |
1042 | #define CRYPTO_GENERIC_ERROR 2 |
1043 | #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4 |
1044 | #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8 |
1045 | #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16 |
1046 | #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32 |
1047 | #define CRYPTO_INVALID_PACKET_SYNTAX 64 |
1048 | #define CRYPTO_INVALID_PROTOCOL 128 |
1049 | |
1050 | __u8 proto; |
1051 | __u8 inner_ipproto; |
1052 | }; |
1053 | |
1054 | struct sec_path { |
1055 | int len; |
1056 | int olen; |
1057 | int verified_cnt; |
1058 | |
1059 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
1060 | struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH]; |
1061 | }; |
1062 | |
1063 | struct sec_path *secpath_set(struct sk_buff *skb); |
1064 | |
1065 | static inline void |
1066 | secpath_reset(struct sk_buff *skb) |
1067 | { |
1068 | #ifdef CONFIG_XFRM |
1069 | skb_ext_del(skb, id: SKB_EXT_SEC_PATH); |
1070 | #endif |
1071 | } |
1072 | |
1073 | static inline int |
1074 | xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) |
1075 | { |
1076 | switch (family) { |
1077 | case AF_INET: |
1078 | return addr->a4 == 0; |
1079 | case AF_INET6: |
1080 | return ipv6_addr_any(a: &addr->in6); |
1081 | } |
1082 | return 0; |
1083 | } |
1084 | |
1085 | static inline int |
1086 | __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1087 | { |
1088 | return (tmpl->saddr.a4 && |
1089 | tmpl->saddr.a4 != x->props.saddr.a4); |
1090 | } |
1091 | |
1092 | static inline int |
1093 | __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1094 | { |
1095 | return (!ipv6_addr_any(a: (struct in6_addr*)&tmpl->saddr) && |
1096 | !ipv6_addr_equal(a1: (struct in6_addr *)&tmpl->saddr, a2: (struct in6_addr*)&x->props.saddr)); |
1097 | } |
1098 | |
1099 | static inline int |
1100 | xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) |
1101 | { |
1102 | switch (family) { |
1103 | case AF_INET: |
1104 | return __xfrm4_state_addr_cmp(tmpl, x); |
1105 | case AF_INET6: |
1106 | return __xfrm6_state_addr_cmp(tmpl, x); |
1107 | } |
1108 | return !0; |
1109 | } |
1110 | |
1111 | #ifdef CONFIG_XFRM |
1112 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
1113 | { |
1114 | struct sec_path *sp = skb_sec_path(skb); |
1115 | |
1116 | return sp->xvec[sp->len - 1]; |
1117 | } |
1118 | #endif |
1119 | |
1120 | static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb) |
1121 | { |
1122 | #ifdef CONFIG_XFRM |
1123 | struct sec_path *sp = skb_sec_path(skb); |
1124 | |
1125 | if (!sp || !sp->olen || sp->len != sp->olen) |
1126 | return NULL; |
1127 | |
1128 | return &sp->ovec[sp->olen - 1]; |
1129 | #else |
1130 | return NULL; |
1131 | #endif |
1132 | } |
1133 | |
1134 | #ifdef CONFIG_XFRM |
1135 | int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, |
1136 | unsigned short family); |
1137 | |
1138 | static inline bool __xfrm_check_nopolicy(struct net *net, struct sk_buff *skb, |
1139 | int dir) |
1140 | { |
1141 | if (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) |
1142 | return net->xfrm.policy_default[dir] == XFRM_USERPOLICY_ACCEPT; |
1143 | |
1144 | return false; |
1145 | } |
1146 | |
1147 | static inline bool __xfrm_check_dev_nopolicy(struct sk_buff *skb, |
1148 | int dir, unsigned short family) |
1149 | { |
1150 | if (dir != XFRM_POLICY_OUT && family == AF_INET) { |
1151 | /* same dst may be used for traffic originating from |
1152 | * devices with different policy settings. |
1153 | */ |
1154 | return IPCB(skb)->flags & IPSKB_NOPOLICY; |
1155 | } |
1156 | return skb_dst(skb) && (skb_dst(skb)->flags & DST_NOPOLICY); |
1157 | } |
1158 | |
1159 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
1160 | struct sk_buff *skb, |
1161 | unsigned int family, int reverse) |
1162 | { |
1163 | struct net *net = dev_net(dev: skb->dev); |
1164 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
1165 | struct xfrm_offload *xo = xfrm_offload(skb); |
1166 | struct xfrm_state *x; |
1167 | |
1168 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
1169 | return __xfrm_policy_check(sk, dir: ndir, skb, family); |
1170 | |
1171 | if (xo) { |
1172 | x = xfrm_input_state(skb); |
1173 | if (x->xso.type == XFRM_DEV_OFFLOAD_PACKET) |
1174 | return (xo->flags & CRYPTO_DONE) && |
1175 | (xo->status & CRYPTO_SUCCESS); |
1176 | } |
1177 | |
1178 | return __xfrm_check_nopolicy(net, skb, dir) || |
1179 | __xfrm_check_dev_nopolicy(skb, dir, family) || |
1180 | __xfrm_policy_check(sk, dir: ndir, skb, family); |
1181 | } |
1182 | |
1183 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) |
1184 | { |
1185 | return __xfrm_policy_check2(sk, dir, skb, family, reverse: 0); |
1186 | } |
1187 | |
1188 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
1189 | { |
1190 | return xfrm_policy_check(sk, dir, skb, AF_INET); |
1191 | } |
1192 | |
1193 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
1194 | { |
1195 | return xfrm_policy_check(sk, dir, skb, AF_INET6); |
1196 | } |
1197 | |
1198 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1199 | struct sk_buff *skb) |
1200 | { |
1201 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, reverse: 1); |
1202 | } |
1203 | |
1204 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, |
1205 | struct sk_buff *skb) |
1206 | { |
1207 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, reverse: 1); |
1208 | } |
1209 | |
1210 | int __xfrm_decode_session(struct net *net, struct sk_buff *skb, struct flowi *fl, |
1211 | unsigned int family, int reverse); |
1212 | |
1213 | static inline int xfrm_decode_session(struct net *net, struct sk_buff *skb, struct flowi *fl, |
1214 | unsigned int family) |
1215 | { |
1216 | return __xfrm_decode_session(net, skb, fl, family, reverse: 0); |
1217 | } |
1218 | |
1219 | static inline int xfrm_decode_session_reverse(struct net *net, struct sk_buff *skb, |
1220 | struct flowi *fl, |
1221 | unsigned int family) |
1222 | { |
1223 | return __xfrm_decode_session(net, skb, fl, family, reverse: 1); |
1224 | } |
1225 | |
1226 | int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
1227 | |
1228 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) |
1229 | { |
1230 | struct net *net = dev_net(dev: skb->dev); |
1231 | |
1232 | if (!net->xfrm.policy_count[XFRM_POLICY_OUT] && |
1233 | net->xfrm.policy_default[XFRM_POLICY_OUT] == XFRM_USERPOLICY_ACCEPT) |
1234 | return true; |
1235 | |
1236 | return (skb_dst(skb)->flags & DST_NOXFRM) || |
1237 | __xfrm_route_forward(skb, family); |
1238 | } |
1239 | |
1240 | static inline int xfrm4_route_forward(struct sk_buff *skb) |
1241 | { |
1242 | return xfrm_route_forward(skb, AF_INET); |
1243 | } |
1244 | |
1245 | static inline int xfrm6_route_forward(struct sk_buff *skb) |
1246 | { |
1247 | return xfrm_route_forward(skb, AF_INET6); |
1248 | } |
1249 | |
1250 | int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk); |
1251 | |
1252 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) |
1253 | { |
1254 | if (!sk_fullsock(sk: osk)) |
1255 | return 0; |
1256 | sk->sk_policy[0] = NULL; |
1257 | sk->sk_policy[1] = NULL; |
1258 | if (unlikely(osk->sk_policy[0] || osk->sk_policy[1])) |
1259 | return __xfrm_sk_clone_policy(sk, osk); |
1260 | return 0; |
1261 | } |
1262 | |
1263 | int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1264 | |
1265 | static inline void xfrm_sk_free_policy(struct sock *sk) |
1266 | { |
1267 | struct xfrm_policy *pol; |
1268 | |
1269 | pol = rcu_dereference_protected(sk->sk_policy[0], 1); |
1270 | if (unlikely(pol != NULL)) { |
1271 | xfrm_policy_delete(pol, dir: XFRM_POLICY_MAX); |
1272 | sk->sk_policy[0] = NULL; |
1273 | } |
1274 | pol = rcu_dereference_protected(sk->sk_policy[1], 1); |
1275 | if (unlikely(pol != NULL)) { |
1276 | xfrm_policy_delete(pol, dir: XFRM_POLICY_MAX+1); |
1277 | sk->sk_policy[1] = NULL; |
1278 | } |
1279 | } |
1280 | |
1281 | #else |
1282 | |
1283 | static inline void xfrm_sk_free_policy(struct sock *sk) {} |
1284 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; } |
1285 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } |
1286 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } |
1287 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
1288 | { |
1289 | return 1; |
1290 | } |
1291 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
1292 | { |
1293 | return 1; |
1294 | } |
1295 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) |
1296 | { |
1297 | return 1; |
1298 | } |
1299 | static inline int xfrm_decode_session_reverse(struct net *net, struct sk_buff *skb, |
1300 | struct flowi *fl, |
1301 | unsigned int family) |
1302 | { |
1303 | return -ENOSYS; |
1304 | } |
1305 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1306 | struct sk_buff *skb) |
1307 | { |
1308 | return 1; |
1309 | } |
1310 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, |
1311 | struct sk_buff *skb) |
1312 | { |
1313 | return 1; |
1314 | } |
1315 | #endif |
1316 | |
1317 | static __inline__ |
1318 | xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) |
1319 | { |
1320 | switch (family){ |
1321 | case AF_INET: |
1322 | return (xfrm_address_t *)&fl->u.ip4.daddr; |
1323 | case AF_INET6: |
1324 | return (xfrm_address_t *)&fl->u.ip6.daddr; |
1325 | } |
1326 | return NULL; |
1327 | } |
1328 | |
1329 | static __inline__ |
1330 | xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) |
1331 | { |
1332 | switch (family){ |
1333 | case AF_INET: |
1334 | return (xfrm_address_t *)&fl->u.ip4.saddr; |
1335 | case AF_INET6: |
1336 | return (xfrm_address_t *)&fl->u.ip6.saddr; |
1337 | } |
1338 | return NULL; |
1339 | } |
1340 | |
1341 | static __inline__ |
1342 | void xfrm_flowi_addr_get(const struct flowi *fl, |
1343 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
1344 | unsigned short family) |
1345 | { |
1346 | switch(family) { |
1347 | case AF_INET: |
1348 | memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); |
1349 | memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); |
1350 | break; |
1351 | case AF_INET6: |
1352 | saddr->in6 = fl->u.ip6.saddr; |
1353 | daddr->in6 = fl->u.ip6.daddr; |
1354 | break; |
1355 | } |
1356 | } |
1357 | |
1358 | static __inline__ int |
1359 | __xfrm4_state_addr_check(const struct xfrm_state *x, |
1360 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) |
1361 | { |
1362 | if (daddr->a4 == x->id.daddr.a4 && |
1363 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) |
1364 | return 1; |
1365 | return 0; |
1366 | } |
1367 | |
1368 | static __inline__ int |
1369 | __xfrm6_state_addr_check(const struct xfrm_state *x, |
1370 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) |
1371 | { |
1372 | if (ipv6_addr_equal(a1: (struct in6_addr *)daddr, a2: (struct in6_addr *)&x->id.daddr) && |
1373 | (ipv6_addr_equal(a1: (struct in6_addr *)saddr, a2: (struct in6_addr *)&x->props.saddr) || |
1374 | ipv6_addr_any(a: (struct in6_addr *)saddr) || |
1375 | ipv6_addr_any(a: (struct in6_addr *)&x->props.saddr))) |
1376 | return 1; |
1377 | return 0; |
1378 | } |
1379 | |
1380 | static __inline__ int |
1381 | xfrm_state_addr_check(const struct xfrm_state *x, |
1382 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
1383 | unsigned short family) |
1384 | { |
1385 | switch (family) { |
1386 | case AF_INET: |
1387 | return __xfrm4_state_addr_check(x, daddr, saddr); |
1388 | case AF_INET6: |
1389 | return __xfrm6_state_addr_check(x, daddr, saddr); |
1390 | } |
1391 | return 0; |
1392 | } |
1393 | |
1394 | static __inline__ int |
1395 | xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, |
1396 | unsigned short family) |
1397 | { |
1398 | switch (family) { |
1399 | case AF_INET: |
1400 | return __xfrm4_state_addr_check(x, |
1401 | daddr: (const xfrm_address_t *)&fl->u.ip4.daddr, |
1402 | saddr: (const xfrm_address_t *)&fl->u.ip4.saddr); |
1403 | case AF_INET6: |
1404 | return __xfrm6_state_addr_check(x, |
1405 | daddr: (const xfrm_address_t *)&fl->u.ip6.daddr, |
1406 | saddr: (const xfrm_address_t *)&fl->u.ip6.saddr); |
1407 | } |
1408 | return 0; |
1409 | } |
1410 | |
1411 | static inline int xfrm_state_kern(const struct xfrm_state *x) |
1412 | { |
1413 | return atomic_read(v: &x->tunnel_users); |
1414 | } |
1415 | |
1416 | static inline bool xfrm_id_proto_valid(u8 proto) |
1417 | { |
1418 | switch (proto) { |
1419 | case IPPROTO_AH: |
1420 | case IPPROTO_ESP: |
1421 | case IPPROTO_COMP: |
1422 | #if IS_ENABLED(CONFIG_IPV6) |
1423 | case IPPROTO_ROUTING: |
1424 | case IPPROTO_DSTOPTS: |
1425 | #endif |
1426 | return true; |
1427 | default: |
1428 | return false; |
1429 | } |
1430 | } |
1431 | |
1432 | /* IPSEC_PROTO_ANY only matches 3 IPsec protocols, 0 could match all. */ |
1433 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1434 | { |
1435 | return (!userproto || proto == userproto || |
1436 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || |
1437 | proto == IPPROTO_ESP || |
1438 | proto == IPPROTO_COMP))); |
1439 | } |
1440 | |
1441 | /* |
1442 | * xfrm algorithm information |
1443 | */ |
1444 | struct xfrm_algo_aead_info { |
1445 | char *geniv; |
1446 | u16 icv_truncbits; |
1447 | }; |
1448 | |
1449 | struct xfrm_algo_auth_info { |
1450 | u16 icv_truncbits; |
1451 | u16 icv_fullbits; |
1452 | }; |
1453 | |
1454 | struct xfrm_algo_encr_info { |
1455 | char *geniv; |
1456 | u16 blockbits; |
1457 | u16 defkeybits; |
1458 | }; |
1459 | |
1460 | struct xfrm_algo_comp_info { |
1461 | u16 threshold; |
1462 | }; |
1463 | |
1464 | struct xfrm_algo_desc { |
1465 | char *name; |
1466 | char *compat; |
1467 | u8 available:1; |
1468 | u8 pfkey_supported:1; |
1469 | union { |
1470 | struct xfrm_algo_aead_info aead; |
1471 | struct xfrm_algo_auth_info auth; |
1472 | struct xfrm_algo_encr_info encr; |
1473 | struct xfrm_algo_comp_info comp; |
1474 | } uinfo; |
1475 | struct sadb_alg desc; |
1476 | }; |
1477 | |
1478 | /* XFRM protocol handlers. */ |
1479 | struct xfrm4_protocol { |
1480 | int (*handler)(struct sk_buff *skb); |
1481 | int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, |
1482 | int encap_type); |
1483 | int (*cb_handler)(struct sk_buff *skb, int err); |
1484 | int (*err_handler)(struct sk_buff *skb, u32 info); |
1485 | |
1486 | struct xfrm4_protocol __rcu *next; |
1487 | int priority; |
1488 | }; |
1489 | |
1490 | struct xfrm6_protocol { |
1491 | int (*handler)(struct sk_buff *skb); |
1492 | int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, |
1493 | int encap_type); |
1494 | int (*cb_handler)(struct sk_buff *skb, int err); |
1495 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, |
1496 | u8 type, u8 code, int offset, __be32 info); |
1497 | |
1498 | struct xfrm6_protocol __rcu *next; |
1499 | int priority; |
1500 | }; |
1501 | |
1502 | /* XFRM tunnel handlers. */ |
1503 | struct xfrm_tunnel { |
1504 | int (*handler)(struct sk_buff *skb); |
1505 | int (*cb_handler)(struct sk_buff *skb, int err); |
1506 | int (*err_handler)(struct sk_buff *skb, u32 info); |
1507 | |
1508 | struct xfrm_tunnel __rcu *next; |
1509 | int priority; |
1510 | }; |
1511 | |
1512 | struct xfrm6_tunnel { |
1513 | int (*handler)(struct sk_buff *skb); |
1514 | int (*cb_handler)(struct sk_buff *skb, int err); |
1515 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, |
1516 | u8 type, u8 code, int offset, __be32 info); |
1517 | struct xfrm6_tunnel __rcu *next; |
1518 | int priority; |
1519 | }; |
1520 | |
1521 | void xfrm_init(void); |
1522 | void xfrm4_init(void); |
1523 | int xfrm_state_init(struct net *net); |
1524 | void xfrm_state_fini(struct net *net); |
1525 | void xfrm4_state_init(void); |
1526 | void xfrm4_protocol_init(void); |
1527 | #ifdef CONFIG_XFRM |
1528 | int xfrm6_init(void); |
1529 | void xfrm6_fini(void); |
1530 | int xfrm6_state_init(void); |
1531 | void xfrm6_state_fini(void); |
1532 | int xfrm6_protocol_init(void); |
1533 | void xfrm6_protocol_fini(void); |
1534 | #else |
1535 | static inline int xfrm6_init(void) |
1536 | { |
1537 | return 0; |
1538 | } |
1539 | static inline void xfrm6_fini(void) |
1540 | { |
1541 | ; |
1542 | } |
1543 | #endif |
1544 | |
1545 | #ifdef CONFIG_XFRM_STATISTICS |
1546 | int xfrm_proc_init(struct net *net); |
1547 | void xfrm_proc_fini(struct net *net); |
1548 | #endif |
1549 | |
1550 | int xfrm_sysctl_init(struct net *net); |
1551 | #ifdef CONFIG_SYSCTL |
1552 | void xfrm_sysctl_fini(struct net *net); |
1553 | #else |
1554 | static inline void xfrm_sysctl_fini(struct net *net) |
1555 | { |
1556 | } |
1557 | #endif |
1558 | |
1559 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
1560 | struct xfrm_address_filter *filter); |
1561 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
1562 | int (*func)(struct xfrm_state *, int, void*), void *); |
1563 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); |
1564 | struct xfrm_state *xfrm_state_alloc(struct net *net); |
1565 | void xfrm_state_free(struct xfrm_state *x); |
1566 | struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, |
1567 | const xfrm_address_t *saddr, |
1568 | const struct flowi *fl, |
1569 | struct xfrm_tmpl *tmpl, |
1570 | struct xfrm_policy *pol, int *err, |
1571 | unsigned short family, u32 if_id); |
1572 | struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id, |
1573 | xfrm_address_t *daddr, |
1574 | xfrm_address_t *saddr, |
1575 | unsigned short family, |
1576 | u8 mode, u8 proto, u32 reqid); |
1577 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
1578 | unsigned short family); |
1579 | int xfrm_state_check_expire(struct xfrm_state *x); |
1580 | #ifdef CONFIG_XFRM_OFFLOAD |
1581 | static inline void xfrm_dev_state_update_curlft(struct xfrm_state *x) |
1582 | { |
1583 | struct xfrm_dev_offload *xdo = &x->xso; |
1584 | struct net_device *dev = xdo->dev; |
1585 | |
1586 | if (x->xso.type != XFRM_DEV_OFFLOAD_PACKET) |
1587 | return; |
1588 | |
1589 | if (dev && dev->xfrmdev_ops && |
1590 | dev->xfrmdev_ops->xdo_dev_state_update_curlft) |
1591 | dev->xfrmdev_ops->xdo_dev_state_update_curlft(x); |
1592 | |
1593 | } |
1594 | #else |
1595 | static inline void xfrm_dev_state_update_curlft(struct xfrm_state *x) {} |
1596 | #endif |
1597 | void xfrm_state_insert(struct xfrm_state *x); |
1598 | int xfrm_state_add(struct xfrm_state *x); |
1599 | int xfrm_state_update(struct xfrm_state *x); |
1600 | struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, |
1601 | const xfrm_address_t *daddr, __be32 spi, |
1602 | u8 proto, unsigned short family); |
1603 | struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
1604 | const xfrm_address_t *daddr, |
1605 | const xfrm_address_t *saddr, |
1606 | u8 proto, |
1607 | unsigned short family); |
1608 | #ifdef CONFIG_XFRM_SUB_POLICY |
1609 | void xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, |
1610 | unsigned short family); |
1611 | void xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, |
1612 | unsigned short family); |
1613 | #else |
1614 | static inline void xfrm_tmpl_sort(struct xfrm_tmpl **d, struct xfrm_tmpl **s, |
1615 | int n, unsigned short family) |
1616 | { |
1617 | } |
1618 | |
1619 | static inline void xfrm_state_sort(struct xfrm_state **d, struct xfrm_state **s, |
1620 | int n, unsigned short family) |
1621 | { |
1622 | } |
1623 | #endif |
1624 | |
1625 | struct xfrmk_sadinfo { |
1626 | u32 sadhcnt; /* current hash bkts */ |
1627 | u32 sadhmcnt; /* max allowed hash bkts */ |
1628 | u32 sadcnt; /* current running count */ |
1629 | }; |
1630 | |
1631 | struct xfrmk_spdinfo { |
1632 | u32 incnt; |
1633 | u32 outcnt; |
1634 | u32 fwdcnt; |
1635 | u32 inscnt; |
1636 | u32 outscnt; |
1637 | u32 fwdscnt; |
1638 | u32 spdhcnt; |
1639 | u32 spdhmcnt; |
1640 | }; |
1641 | |
1642 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1643 | int xfrm_state_delete(struct xfrm_state *x); |
1644 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync); |
1645 | int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid); |
1646 | int xfrm_dev_policy_flush(struct net *net, struct net_device *dev, |
1647 | bool task_valid); |
1648 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); |
1649 | void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); |
1650 | u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); |
1651 | int xfrm_init_replay(struct xfrm_state *x, struct netlink_ext_ack *extack); |
1652 | u32 xfrm_state_mtu(struct xfrm_state *x, int mtu); |
1653 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload, |
1654 | struct netlink_ext_ack *extack); |
1655 | int xfrm_init_state(struct xfrm_state *x); |
1656 | int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); |
1657 | int xfrm_input_resume(struct sk_buff *skb, int nexthdr); |
1658 | int xfrm_trans_queue_net(struct net *net, struct sk_buff *skb, |
1659 | int (*finish)(struct net *, struct sock *, |
1660 | struct sk_buff *)); |
1661 | int xfrm_trans_queue(struct sk_buff *skb, |
1662 | int (*finish)(struct net *, struct sock *, |
1663 | struct sk_buff *)); |
1664 | int xfrm_output_resume(struct sock *sk, struct sk_buff *skb, int err); |
1665 | int xfrm_output(struct sock *sk, struct sk_buff *skb); |
1666 | |
1667 | #if IS_ENABLED(CONFIG_NET_PKTGEN) |
1668 | int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb); |
1669 | #endif |
1670 | |
1671 | void xfrm_local_error(struct sk_buff *skb, int mtu); |
1672 | int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
1673 | int encap_type); |
1674 | int xfrm4_transport_finish(struct sk_buff *skb, int async); |
1675 | int xfrm4_rcv(struct sk_buff *skb); |
1676 | |
1677 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) |
1678 | { |
1679 | XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; |
1680 | XFRM_SPI_SKB_CB(skb)->family = AF_INET; |
1681 | XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); |
1682 | return xfrm_input(skb, nexthdr, spi, encap_type: 0); |
1683 | } |
1684 | |
1685 | int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
1686 | int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); |
1687 | int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol); |
1688 | int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1689 | int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); |
1690 | void xfrm4_local_error(struct sk_buff *skb, u32 mtu); |
1691 | int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi, |
1692 | struct ip6_tnl *t); |
1693 | int xfrm6_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
1694 | int encap_type); |
1695 | int xfrm6_transport_finish(struct sk_buff *skb, int async); |
1696 | int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t); |
1697 | int xfrm6_rcv(struct sk_buff *skb); |
1698 | int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, |
1699 | xfrm_address_t *saddr, u8 proto); |
1700 | void xfrm6_local_error(struct sk_buff *skb, u32 mtu); |
1701 | int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol); |
1702 | int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol); |
1703 | int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
1704 | int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); |
1705 | __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
1706 | __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); |
1707 | int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
1708 | |
1709 | #ifdef CONFIG_XFRM |
1710 | void xfrm6_local_rxpmtu(struct sk_buff *skb, u32 mtu); |
1711 | int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1712 | int xfrm6_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1713 | struct sk_buff *xfrm4_gro_udp_encap_rcv(struct sock *sk, struct list_head *head, |
1714 | struct sk_buff *skb); |
1715 | struct sk_buff *xfrm6_gro_udp_encap_rcv(struct sock *sk, struct list_head *head, |
1716 | struct sk_buff *skb); |
1717 | int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval, |
1718 | int optlen); |
1719 | #else |
1720 | static inline int xfrm_user_policy(struct sock *sk, int optname, |
1721 | sockptr_t optval, int optlen) |
1722 | { |
1723 | return -ENOPROTOOPT; |
1724 | } |
1725 | #endif |
1726 | |
1727 | struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif, |
1728 | const xfrm_address_t *saddr, |
1729 | const xfrm_address_t *daddr, |
1730 | int family, u32 mark); |
1731 | |
1732 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
1733 | |
1734 | void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
1735 | int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, |
1736 | int (*func)(struct xfrm_policy *, int, int, void*), |
1737 | void *); |
1738 | void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); |
1739 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
1740 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, |
1741 | const struct xfrm_mark *mark, |
1742 | u32 if_id, u8 type, int dir, |
1743 | struct xfrm_selector *sel, |
1744 | struct xfrm_sec_ctx *ctx, int delete, |
1745 | int *err); |
1746 | struct xfrm_policy *xfrm_policy_byid(struct net *net, |
1747 | const struct xfrm_mark *mark, u32 if_id, |
1748 | u8 type, int dir, u32 id, int delete, |
1749 | int *err); |
1750 | int xfrm_policy_flush(struct net *net, u8 type, bool task_valid); |
1751 | void xfrm_policy_hash_rebuild(struct net *net); |
1752 | u32 xfrm_get_acqseq(void); |
1753 | int verify_spi_info(u8 proto, u32 min, u32 max, struct netlink_ext_ack *extack); |
1754 | int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi, |
1755 | struct netlink_ext_ack *extack); |
1756 | struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, |
1757 | u8 mode, u32 reqid, u32 if_id, u8 proto, |
1758 | const xfrm_address_t *daddr, |
1759 | const xfrm_address_t *saddr, int create, |
1760 | unsigned short family); |
1761 | int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
1762 | |
1763 | #ifdef CONFIG_XFRM_MIGRATE |
1764 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1765 | const struct xfrm_migrate *m, int num_bundles, |
1766 | const struct xfrm_kmaddress *k, |
1767 | const struct xfrm_encap_tmpl *encap); |
1768 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net, |
1769 | u32 if_id); |
1770 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
1771 | struct xfrm_migrate *m, |
1772 | struct xfrm_encap_tmpl *encap); |
1773 | int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1774 | struct xfrm_migrate *m, int num_bundles, |
1775 | struct xfrm_kmaddress *k, struct net *net, |
1776 | struct xfrm_encap_tmpl *encap, u32 if_id, |
1777 | struct netlink_ext_ack *extack); |
1778 | #endif |
1779 | |
1780 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
1781 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); |
1782 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, |
1783 | xfrm_address_t *addr); |
1784 | |
1785 | void xfrm_input_init(void); |
1786 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); |
1787 | |
1788 | void xfrm_probe_algs(void); |
1789 | int xfrm_count_pfkey_auth_supported(void); |
1790 | int xfrm_count_pfkey_enc_supported(void); |
1791 | struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); |
1792 | struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); |
1793 | struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); |
1794 | struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); |
1795 | struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); |
1796 | struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); |
1797 | struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); |
1798 | struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); |
1799 | struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, |
1800 | int probe); |
1801 | |
1802 | static inline bool xfrm6_addr_equal(const xfrm_address_t *a, |
1803 | const xfrm_address_t *b) |
1804 | { |
1805 | return ipv6_addr_equal(a1: (const struct in6_addr *)a, |
1806 | a2: (const struct in6_addr *)b); |
1807 | } |
1808 | |
1809 | static inline bool xfrm_addr_equal(const xfrm_address_t *a, |
1810 | const xfrm_address_t *b, |
1811 | sa_family_t family) |
1812 | { |
1813 | switch (family) { |
1814 | default: |
1815 | case AF_INET: |
1816 | return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; |
1817 | case AF_INET6: |
1818 | return xfrm6_addr_equal(a, b); |
1819 | } |
1820 | } |
1821 | |
1822 | static inline int xfrm_policy_id2dir(u32 index) |
1823 | { |
1824 | return index & 7; |
1825 | } |
1826 | |
1827 | #ifdef CONFIG_XFRM |
1828 | void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq); |
1829 | int xfrm_replay_check(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq); |
1830 | void xfrm_replay_notify(struct xfrm_state *x, int event); |
1831 | int xfrm_replay_overflow(struct xfrm_state *x, struct sk_buff *skb); |
1832 | int xfrm_replay_recheck(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq); |
1833 | |
1834 | static inline int xfrm_aevent_is_on(struct net *net) |
1835 | { |
1836 | struct sock *nlsk; |
1837 | int ret = 0; |
1838 | |
1839 | rcu_read_lock(); |
1840 | nlsk = rcu_dereference(net->xfrm.nlsk); |
1841 | if (nlsk) |
1842 | ret = netlink_has_listeners(sk: nlsk, XFRMNLGRP_AEVENTS); |
1843 | rcu_read_unlock(); |
1844 | return ret; |
1845 | } |
1846 | |
1847 | static inline int xfrm_acquire_is_on(struct net *net) |
1848 | { |
1849 | struct sock *nlsk; |
1850 | int ret = 0; |
1851 | |
1852 | rcu_read_lock(); |
1853 | nlsk = rcu_dereference(net->xfrm.nlsk); |
1854 | if (nlsk) |
1855 | ret = netlink_has_listeners(sk: nlsk, XFRMNLGRP_ACQUIRE); |
1856 | rcu_read_unlock(); |
1857 | |
1858 | return ret; |
1859 | } |
1860 | #endif |
1861 | |
1862 | static inline unsigned int aead_len(struct xfrm_algo_aead *alg) |
1863 | { |
1864 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); |
1865 | } |
1866 | |
1867 | static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg) |
1868 | { |
1869 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); |
1870 | } |
1871 | |
1872 | static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) |
1873 | { |
1874 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); |
1875 | } |
1876 | |
1877 | static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) |
1878 | { |
1879 | return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); |
1880 | } |
1881 | |
1882 | #ifdef CONFIG_XFRM_MIGRATE |
1883 | static inline int xfrm_replay_clone(struct xfrm_state *x, |
1884 | struct xfrm_state *orig) |
1885 | { |
1886 | |
1887 | x->replay_esn = kmemdup(p: orig->replay_esn, |
1888 | size: xfrm_replay_state_esn_len(replay_esn: orig->replay_esn), |
1889 | GFP_KERNEL); |
1890 | if (!x->replay_esn) |
1891 | return -ENOMEM; |
1892 | x->preplay_esn = kmemdup(p: orig->preplay_esn, |
1893 | size: xfrm_replay_state_esn_len(replay_esn: orig->preplay_esn), |
1894 | GFP_KERNEL); |
1895 | if (!x->preplay_esn) |
1896 | return -ENOMEM; |
1897 | |
1898 | return 0; |
1899 | } |
1900 | |
1901 | static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig) |
1902 | { |
1903 | return kmemdup(p: orig, size: aead_len(alg: orig), GFP_KERNEL); |
1904 | } |
1905 | |
1906 | |
1907 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
1908 | { |
1909 | return kmemdup(p: orig, size: xfrm_alg_len(alg: orig), GFP_KERNEL); |
1910 | } |
1911 | |
1912 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
1913 | { |
1914 | return kmemdup(p: orig, size: xfrm_alg_auth_len(alg: orig), GFP_KERNEL); |
1915 | } |
1916 | |
1917 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
1918 | { |
1919 | int i; |
1920 | for (i = 0; i < n; i++) |
1921 | xfrm_state_put(x: *(states + i)); |
1922 | } |
1923 | |
1924 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) |
1925 | { |
1926 | int i; |
1927 | for (i = 0; i < n; i++) |
1928 | xfrm_state_delete(x: *(states + i)); |
1929 | } |
1930 | #endif |
1931 | |
1932 | void __init xfrm_dev_init(void); |
1933 | |
1934 | #ifdef CONFIG_XFRM_OFFLOAD |
1935 | void xfrm_dev_resume(struct sk_buff *skb); |
1936 | void xfrm_dev_backlog(struct softnet_data *sd); |
1937 | struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again); |
1938 | int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, |
1939 | struct xfrm_user_offload *xuo, |
1940 | struct netlink_ext_ack *extack); |
1941 | int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp, |
1942 | struct xfrm_user_offload *xuo, u8 dir, |
1943 | struct netlink_ext_ack *extack); |
1944 | bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x); |
1945 | |
1946 | static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x) |
1947 | { |
1948 | struct xfrm_dev_offload *xso = &x->xso; |
1949 | |
1950 | if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn) |
1951 | xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x); |
1952 | } |
1953 | |
1954 | static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) |
1955 | { |
1956 | struct xfrm_state *x = dst->xfrm; |
1957 | struct xfrm_dst *xdst; |
1958 | |
1959 | if (!x || !x->type_offload) |
1960 | return false; |
1961 | |
1962 | xdst = (struct xfrm_dst *) dst; |
1963 | if (!x->xso.offload_handle && !xdst->child->xfrm) |
1964 | return true; |
1965 | if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) && |
1966 | !xdst->child->xfrm) |
1967 | return true; |
1968 | |
1969 | return false; |
1970 | } |
1971 | |
1972 | static inline void xfrm_dev_state_delete(struct xfrm_state *x) |
1973 | { |
1974 | struct xfrm_dev_offload *xso = &x->xso; |
1975 | |
1976 | if (xso->dev) |
1977 | xso->dev->xfrmdev_ops->xdo_dev_state_delete(x); |
1978 | } |
1979 | |
1980 | static inline void xfrm_dev_state_free(struct xfrm_state *x) |
1981 | { |
1982 | struct xfrm_dev_offload *xso = &x->xso; |
1983 | struct net_device *dev = xso->dev; |
1984 | |
1985 | if (dev && dev->xfrmdev_ops) { |
1986 | if (dev->xfrmdev_ops->xdo_dev_state_free) |
1987 | dev->xfrmdev_ops->xdo_dev_state_free(x); |
1988 | xso->dev = NULL; |
1989 | xso->type = XFRM_DEV_OFFLOAD_UNSPECIFIED; |
1990 | netdev_put(dev, tracker: &xso->dev_tracker); |
1991 | } |
1992 | } |
1993 | |
1994 | static inline void xfrm_dev_policy_delete(struct xfrm_policy *x) |
1995 | { |
1996 | struct xfrm_dev_offload *xdo = &x->xdo; |
1997 | struct net_device *dev = xdo->dev; |
1998 | |
1999 | if (dev && dev->xfrmdev_ops && dev->xfrmdev_ops->xdo_dev_policy_delete) |
2000 | dev->xfrmdev_ops->xdo_dev_policy_delete(x); |
2001 | } |
2002 | |
2003 | static inline void xfrm_dev_policy_free(struct xfrm_policy *x) |
2004 | { |
2005 | struct xfrm_dev_offload *xdo = &x->xdo; |
2006 | struct net_device *dev = xdo->dev; |
2007 | |
2008 | if (dev && dev->xfrmdev_ops) { |
2009 | if (dev->xfrmdev_ops->xdo_dev_policy_free) |
2010 | dev->xfrmdev_ops->xdo_dev_policy_free(x); |
2011 | xdo->dev = NULL; |
2012 | netdev_put(dev, tracker: &xdo->dev_tracker); |
2013 | } |
2014 | } |
2015 | #else |
2016 | static inline void xfrm_dev_resume(struct sk_buff *skb) |
2017 | { |
2018 | } |
2019 | |
2020 | static inline void xfrm_dev_backlog(struct softnet_data *sd) |
2021 | { |
2022 | } |
2023 | |
2024 | static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again) |
2025 | { |
2026 | return skb; |
2027 | } |
2028 | |
2029 | static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo, struct netlink_ext_ack *extack) |
2030 | { |
2031 | return 0; |
2032 | } |
2033 | |
2034 | static inline void xfrm_dev_state_delete(struct xfrm_state *x) |
2035 | { |
2036 | } |
2037 | |
2038 | static inline void xfrm_dev_state_free(struct xfrm_state *x) |
2039 | { |
2040 | } |
2041 | |
2042 | static inline int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp, |
2043 | struct xfrm_user_offload *xuo, u8 dir, |
2044 | struct netlink_ext_ack *extack) |
2045 | { |
2046 | return 0; |
2047 | } |
2048 | |
2049 | static inline void xfrm_dev_policy_delete(struct xfrm_policy *x) |
2050 | { |
2051 | } |
2052 | |
2053 | static inline void xfrm_dev_policy_free(struct xfrm_policy *x) |
2054 | { |
2055 | } |
2056 | |
2057 | static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x) |
2058 | { |
2059 | return false; |
2060 | } |
2061 | |
2062 | static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x) |
2063 | { |
2064 | } |
2065 | |
2066 | static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) |
2067 | { |
2068 | return false; |
2069 | } |
2070 | #endif |
2071 | |
2072 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
2073 | { |
2074 | if (attrs[XFRMA_MARK]) |
2075 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
2076 | else |
2077 | m->v = m->m = 0; |
2078 | |
2079 | return m->v & m->m; |
2080 | } |
2081 | |
2082 | static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) |
2083 | { |
2084 | int ret = 0; |
2085 | |
2086 | if (m->m | m->v) |
2087 | ret = nla_put(skb, attrtype: XFRMA_MARK, attrlen: sizeof(struct xfrm_mark), data: m); |
2088 | return ret; |
2089 | } |
2090 | |
2091 | static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x) |
2092 | { |
2093 | struct xfrm_mark *m = &x->props.smark; |
2094 | |
2095 | return (m->v & m->m) | (mark & ~m->m); |
2096 | } |
2097 | |
2098 | static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id) |
2099 | { |
2100 | int ret = 0; |
2101 | |
2102 | if (if_id) |
2103 | ret = nla_put_u32(skb, attrtype: XFRMA_IF_ID, value: if_id); |
2104 | return ret; |
2105 | } |
2106 | |
2107 | static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, |
2108 | unsigned int family) |
2109 | { |
2110 | bool tunnel = false; |
2111 | |
2112 | switch(family) { |
2113 | case AF_INET: |
2114 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) |
2115 | tunnel = true; |
2116 | break; |
2117 | case AF_INET6: |
2118 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) |
2119 | tunnel = true; |
2120 | break; |
2121 | } |
2122 | if (tunnel && !(x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL)) |
2123 | return -EINVAL; |
2124 | |
2125 | return 0; |
2126 | } |
2127 | |
2128 | extern const int xfrm_msg_min[XFRM_NR_MSGTYPES]; |
2129 | extern const struct nla_policy xfrma_policy[XFRMA_MAX+1]; |
2130 | |
2131 | struct xfrm_translator { |
2132 | /* Allocate frag_list and put compat translation there */ |
2133 | int (*alloc_compat)(struct sk_buff *skb, const struct nlmsghdr *src); |
2134 | |
2135 | /* Allocate nlmsg with 64-bit translaton of received 32-bit message */ |
2136 | struct nlmsghdr *(*rcv_msg_compat)(const struct nlmsghdr *nlh, |
2137 | int maxtype, const struct nla_policy *policy, |
2138 | struct netlink_ext_ack *extack); |
2139 | |
2140 | /* Translate 32-bit user_policy from sockptr */ |
2141 | int (*xlate_user_policy_sockptr)(u8 **pdata32, int optlen); |
2142 | |
2143 | struct module *owner; |
2144 | }; |
2145 | |
2146 | #if IS_ENABLED(CONFIG_XFRM_USER_COMPAT) |
2147 | extern int xfrm_register_translator(struct xfrm_translator *xtr); |
2148 | extern int xfrm_unregister_translator(struct xfrm_translator *xtr); |
2149 | extern struct xfrm_translator *xfrm_get_translator(void); |
2150 | extern void xfrm_put_translator(struct xfrm_translator *xtr); |
2151 | #else |
2152 | static inline struct xfrm_translator *xfrm_get_translator(void) |
2153 | { |
2154 | return NULL; |
2155 | } |
2156 | static inline void xfrm_put_translator(struct xfrm_translator *xtr) |
2157 | { |
2158 | } |
2159 | #endif |
2160 | |
2161 | #if IS_ENABLED(CONFIG_IPV6) |
2162 | static inline bool xfrm6_local_dontfrag(const struct sock *sk) |
2163 | { |
2164 | int proto; |
2165 | |
2166 | if (!sk || sk->sk_family != AF_INET6) |
2167 | return false; |
2168 | |
2169 | proto = sk->sk_protocol; |
2170 | if (proto == IPPROTO_UDP || proto == IPPROTO_RAW) |
2171 | return inet6_test_bit(DONTFRAG, sk); |
2172 | |
2173 | return false; |
2174 | } |
2175 | #endif |
2176 | |
2177 | #if (IS_BUILTIN(CONFIG_XFRM_INTERFACE) && IS_ENABLED(CONFIG_DEBUG_INFO_BTF)) || \ |
2178 | (IS_MODULE(CONFIG_XFRM_INTERFACE) && IS_ENABLED(CONFIG_DEBUG_INFO_BTF_MODULES)) |
2179 | |
2180 | extern struct metadata_dst __percpu *xfrm_bpf_md_dst; |
2181 | |
2182 | int register_xfrm_interface_bpf(void); |
2183 | |
2184 | #else |
2185 | |
2186 | static inline int register_xfrm_interface_bpf(void) |
2187 | { |
2188 | return 0; |
2189 | } |
2190 | |
2191 | #endif |
2192 | |
2193 | #endif /* _NET_XFRM_H */ |
2194 | |