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/inet_dscp.h> |
23 | #include <net/ip.h> |
24 | #include <net/route.h> |
25 | #include <net/ipv6.h> |
26 | #include <net/ip6_fib.h> |
27 | #include <net/flow.h> |
28 | #include <net/gro_cells.h> |
29 | |
30 | #include <linux/interrupt.h> |
31 | |
32 | #ifdef CONFIG_XFRM_STATISTICS |
33 | #include <net/snmp.h> |
34 | #endif |
35 | |
36 | #define XFRM_PROTO_ESP 50 |
37 | #define XFRM_PROTO_AH 51 |
38 | #define XFRM_PROTO_COMP 108 |
39 | #define XFRM_PROTO_IPIP 4 |
40 | #define XFRM_PROTO_IPV6 41 |
41 | #define XFRM_PROTO_IPTFS IPPROTO_AGGFRAG |
42 | #define XFRM_PROTO_ROUTING IPPROTO_ROUTING |
43 | #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS |
44 | |
45 | #define XFRM_ALIGN4(len) (((len) + 3) & ~3) |
46 | #define XFRM_ALIGN8(len) (((len) + 7) & ~7) |
47 | #define MODULE_ALIAS_XFRM_MODE(family, encap) \ |
48 | MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) |
49 | #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ |
50 | MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) |
51 | #define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \ |
52 | MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto)) |
53 | |
54 | #ifdef CONFIG_XFRM_STATISTICS |
55 | #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) |
56 | #define XFRM_ADD_STATS(net, field, val) SNMP_ADD_STATS((net)->mib.xfrm_statistics, field, val) |
57 | #else |
58 | #define XFRM_INC_STATS(net, field) ((void)(net)) |
59 | #define XFRM_ADD_STATS(net, field, val) ((void)(net)) |
60 | #endif |
61 | |
62 | |
63 | /* Organization of SPD aka "XFRM rules" |
64 | ------------------------------------ |
65 | |
66 | Basic objects: |
67 | - policy rule, struct xfrm_policy (=SPD entry) |
68 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) |
69 | - instance of a transformer, struct xfrm_state (=SA) |
70 | - template to clone xfrm_state, struct xfrm_tmpl |
71 | |
72 | SPD is organized as hash table (for policies that meet minimum address prefix |
73 | length setting, net->xfrm.policy_hthresh). Other policies are stored in |
74 | lists, sorted into rbtree ordered by destination and source address networks. |
75 | See net/xfrm/xfrm_policy.c for details. |
76 | |
77 | (To be compatible with existing pfkeyv2 implementations, |
78 | many rules with priority of 0x7fffffff are allowed to exist and |
79 | such rules are ordered in an unpredictable way, thanks to bsd folks.) |
80 | |
81 | If "action" is "block", then we prohibit the flow, otherwise: |
82 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, |
83 | policy entry has list of up to XFRM_MAX_DEPTH transformations, |
84 | described by templates xfrm_tmpl. Each template is resolved |
85 | to a complete xfrm_state (see below) and we pack bundle of transformations |
86 | to a dst_entry returned to requester. |
87 | |
88 | dst -. xfrm .-> xfrm_state #1 |
89 | |---. child .-> dst -. xfrm .-> xfrm_state #2 |
90 | |---. child .-> dst -. xfrm .-> xfrm_state #3 |
91 | |---. child .-> NULL |
92 | |
93 | |
94 | Resolution of xrfm_tmpl |
95 | ----------------------- |
96 | Template contains: |
97 | 1. ->mode Mode: transport or tunnel |
98 | 2. ->id.proto Protocol: AH/ESP/IPCOMP |
99 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. |
100 | Q: allow to resolve security gateway? |
101 | 4. ->id.spi If not zero, static SPI. |
102 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. |
103 | 6. ->algos List of allowed algos. Plain bitmask now. |
104 | Q: ealgos, aalgos, calgos. What a mess... |
105 | 7. ->share Sharing mode. |
106 | Q: how to implement private sharing mode? To add struct sock* to |
107 | flow id? |
108 | |
109 | Having this template we search through SAD searching for entries |
110 | with appropriate mode/proto/algo, permitted by selector. |
111 | If no appropriate entry found, it is requested from key manager. |
112 | |
113 | PROBLEMS: |
114 | Q: How to find all the bundles referring to a physical path for |
115 | PMTU discovery? Seems, dst should contain list of all parents... |
116 | and enter to infinite locking hierarchy disaster. |
117 | No! It is easier, we will not search for them, let them find us. |
118 | We add genid to each dst plus pointer to genid of raw IP route, |
119 | pmtu disc will update pmtu on raw IP route and increase its genid. |
120 | dst_check() will see this for top level and trigger resyncing |
121 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. |
122 | */ |
123 | |
124 | struct xfrm_state_walk { |
125 | struct list_head all; |
126 | u8 state; |
127 | u8 dying; |
128 | u8 proto; |
129 | u32 seq; |
130 | struct xfrm_address_filter *filter; |
131 | }; |
132 | |
133 | enum { |
134 | XFRM_DEV_OFFLOAD_IN = 1, |
135 | XFRM_DEV_OFFLOAD_OUT, |
136 | XFRM_DEV_OFFLOAD_FWD, |
137 | }; |
138 | |
139 | enum { |
140 | XFRM_DEV_OFFLOAD_UNSPECIFIED, |
141 | XFRM_DEV_OFFLOAD_CRYPTO, |
142 | XFRM_DEV_OFFLOAD_PACKET, |
143 | }; |
144 | |
145 | enum { |
146 | XFRM_DEV_OFFLOAD_FLAG_ACQ = 1, |
147 | }; |
148 | |
149 | struct xfrm_dev_offload { |
150 | /* The device for this offload. |
151 | * Device drivers should not use this directly, as that will prevent |
152 | * them from working with bonding device. Instead, the device passed |
153 | * to the add/delete callbacks should be used. |
154 | */ |
155 | struct net_device *dev; |
156 | netdevice_tracker dev_tracker; |
157 | /* This is a private pointer used by the bonding driver (and eventually |
158 | * should be moved there). Device drivers should not use it. |
159 | * Protected by xfrm_state.lock AND bond.ipsec_lock in most cases, |
160 | * except in the .xdo_dev_state_del() flow, where only xfrm_state.lock |
161 | * is held. |
162 | */ |
163 | struct net_device *real_dev; |
164 | unsigned long offload_handle; |
165 | u8 dir : 2; |
166 | u8 type : 2; |
167 | u8 flags : 2; |
168 | }; |
169 | |
170 | struct xfrm_mode { |
171 | u8 encap; |
172 | u8 family; |
173 | u8 flags; |
174 | }; |
175 | |
176 | /* Flags for xfrm_mode. */ |
177 | enum { |
178 | XFRM_MODE_FLAG_TUNNEL = 1, |
179 | }; |
180 | |
181 | enum xfrm_replay_mode { |
182 | XFRM_REPLAY_MODE_LEGACY, |
183 | XFRM_REPLAY_MODE_BMP, |
184 | XFRM_REPLAY_MODE_ESN, |
185 | }; |
186 | |
187 | /* Full description of state of transformer. */ |
188 | struct xfrm_state { |
189 | possible_net_t xs_net; |
190 | union { |
191 | struct hlist_node gclist; |
192 | struct hlist_node bydst; |
193 | }; |
194 | union { |
195 | struct hlist_node dev_gclist; |
196 | struct hlist_node bysrc; |
197 | }; |
198 | struct hlist_node byspi; |
199 | struct hlist_node byseq; |
200 | struct hlist_node state_cache; |
201 | struct hlist_node state_cache_input; |
202 | |
203 | refcount_t refcnt; |
204 | spinlock_t lock; |
205 | |
206 | u32 pcpu_num; |
207 | struct xfrm_id id; |
208 | struct xfrm_selector sel; |
209 | struct xfrm_mark mark; |
210 | u32 if_id; |
211 | u32 tfcpad; |
212 | |
213 | u32 genid; |
214 | |
215 | /* Key manager bits */ |
216 | struct xfrm_state_walk km; |
217 | |
218 | /* Parameters of this state. */ |
219 | struct { |
220 | u32 reqid; |
221 | u8 mode; |
222 | u8 replay_window; |
223 | u8 aalgo, ealgo, calgo; |
224 | u8 flags; |
225 | u16 family; |
226 | xfrm_address_t saddr; |
227 | int header_len; |
228 | int enc_hdr_len; |
229 | int trailer_len; |
230 | u32 extra_flags; |
231 | struct xfrm_mark smark; |
232 | } props; |
233 | |
234 | struct xfrm_lifetime_cfg lft; |
235 | |
236 | /* Data for transformer */ |
237 | struct xfrm_algo_auth *aalg; |
238 | struct xfrm_algo *ealg; |
239 | struct xfrm_algo *calg; |
240 | struct xfrm_algo_aead *aead; |
241 | const char *geniv; |
242 | |
243 | /* mapping change rate limiting */ |
244 | __be16 new_mapping_sport; |
245 | u32 new_mapping; /* seconds */ |
246 | u32 mapping_maxage; /* seconds for input SA */ |
247 | |
248 | /* Data for encapsulator */ |
249 | struct xfrm_encap_tmpl *encap; |
250 | |
251 | /* NAT keepalive */ |
252 | u32 nat_keepalive_interval; /* seconds */ |
253 | time64_t nat_keepalive_expiration; |
254 | |
255 | /* Data for care-of address */ |
256 | xfrm_address_t *coaddr; |
257 | |
258 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
259 | struct xfrm_state *tunnel; |
260 | |
261 | /* If a tunnel, number of users + 1 */ |
262 | atomic_t tunnel_users; |
263 | |
264 | /* State for replay detection */ |
265 | struct xfrm_replay_state replay; |
266 | struct xfrm_replay_state_esn *replay_esn; |
267 | |
268 | /* Replay detection state at the time we sent the last notification */ |
269 | struct xfrm_replay_state preplay; |
270 | struct xfrm_replay_state_esn *preplay_esn; |
271 | |
272 | /* replay detection mode */ |
273 | enum xfrm_replay_mode repl_mode; |
274 | /* internal flag that only holds state for delayed aevent at the |
275 | * moment |
276 | */ |
277 | u32 xflags; |
278 | |
279 | /* Replay detection notification settings */ |
280 | u32 replay_maxage; |
281 | u32 replay_maxdiff; |
282 | |
283 | /* Replay detection notification timer */ |
284 | struct timer_list rtimer; |
285 | |
286 | /* Statistics */ |
287 | struct xfrm_stats stats; |
288 | |
289 | struct xfrm_lifetime_cur curlft; |
290 | struct hrtimer mtimer; |
291 | |
292 | struct xfrm_dev_offload xso; |
293 | |
294 | /* used to fix curlft->add_time when changing date */ |
295 | long saved_tmo; |
296 | |
297 | /* Last used time */ |
298 | time64_t lastused; |
299 | |
300 | struct page_frag xfrag; |
301 | |
302 | /* Reference to data common to all the instances of this |
303 | * transformer. */ |
304 | const struct xfrm_type *type; |
305 | struct xfrm_mode inner_mode; |
306 | struct xfrm_mode inner_mode_iaf; |
307 | struct xfrm_mode outer_mode; |
308 | |
309 | const struct xfrm_type_offload *type_offload; |
310 | |
311 | /* Security context */ |
312 | struct xfrm_sec_ctx *security; |
313 | |
314 | /* Private data of this transformer, format is opaque, |
315 | * interpreted by xfrm_type methods. */ |
316 | void *data; |
317 | u8 dir; |
318 | |
319 | const struct xfrm_mode_cbs *mode_cbs; |
320 | void *mode_data; |
321 | }; |
322 | |
323 | static inline struct net *xs_net(struct xfrm_state *x) |
324 | { |
325 | return read_pnet(pnet: &x->xs_net); |
326 | } |
327 | |
328 | /* xflags - make enum if more show up */ |
329 | #define XFRM_TIME_DEFER 1 |
330 | #define XFRM_SOFT_EXPIRE 2 |
331 | |
332 | enum { |
333 | XFRM_STATE_VOID, |
334 | XFRM_STATE_ACQ, |
335 | XFRM_STATE_VALID, |
336 | XFRM_STATE_ERROR, |
337 | XFRM_STATE_EXPIRED, |
338 | XFRM_STATE_DEAD |
339 | }; |
340 | |
341 | /* callback structure passed from either netlink or pfkey */ |
342 | struct km_event { |
343 | union { |
344 | u32 hard; |
345 | u32 proto; |
346 | u32 byid; |
347 | u32 aevent; |
348 | u32 type; |
349 | } data; |
350 | |
351 | u32 seq; |
352 | u32 portid; |
353 | u32 event; |
354 | struct net *net; |
355 | }; |
356 | |
357 | struct xfrm_if_decode_session_result { |
358 | struct net *net; |
359 | u32 if_id; |
360 | }; |
361 | |
362 | struct xfrm_if_cb { |
363 | bool (*decode_session)(struct sk_buff *skb, |
364 | unsigned short family, |
365 | struct xfrm_if_decode_session_result *res); |
366 | }; |
367 | |
368 | void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb); |
369 | void xfrm_if_unregister_cb(void); |
370 | |
371 | struct xfrm_dst_lookup_params { |
372 | struct net *net; |
373 | dscp_t dscp; |
374 | int oif; |
375 | xfrm_address_t *saddr; |
376 | xfrm_address_t *daddr; |
377 | u32 mark; |
378 | __u8 ipproto; |
379 | union flowi_uli uli; |
380 | }; |
381 | |
382 | struct net_device; |
383 | struct xfrm_type; |
384 | struct xfrm_dst; |
385 | struct xfrm_policy_afinfo { |
386 | struct dst_ops *dst_ops; |
387 | struct dst_entry *(*dst_lookup)(const struct xfrm_dst_lookup_params *params); |
388 | int (*get_saddr)(xfrm_address_t *saddr, |
389 | const struct xfrm_dst_lookup_params *params); |
390 | int (*fill_dst)(struct xfrm_dst *xdst, |
391 | struct net_device *dev, |
392 | const struct flowi *fl); |
393 | struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); |
394 | }; |
395 | |
396 | int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family); |
397 | void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo); |
398 | void km_policy_notify(struct xfrm_policy *xp, int dir, |
399 | const struct km_event *c); |
400 | void km_state_notify(struct xfrm_state *x, const struct km_event *c); |
401 | |
402 | struct xfrm_tmpl; |
403 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, |
404 | struct xfrm_policy *pol); |
405 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); |
406 | int __xfrm_state_delete(struct xfrm_state *x); |
407 | |
408 | struct xfrm_state_afinfo { |
409 | u8 family; |
410 | u8 proto; |
411 | |
412 | const struct xfrm_type_offload *type_offload_esp; |
413 | |
414 | const struct xfrm_type *type_esp; |
415 | const struct xfrm_type *type_ipip; |
416 | const struct xfrm_type *type_ipip6; |
417 | const struct xfrm_type *type_comp; |
418 | const struct xfrm_type *type_ah; |
419 | const struct xfrm_type *type_routing; |
420 | const struct xfrm_type *type_dstopts; |
421 | |
422 | int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb); |
423 | int (*transport_finish)(struct sk_buff *skb, |
424 | int async); |
425 | void (*local_error)(struct sk_buff *skb, u32 mtu); |
426 | }; |
427 | |
428 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); |
429 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); |
430 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); |
431 | struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family); |
432 | |
433 | struct xfrm_input_afinfo { |
434 | u8 family; |
435 | bool is_ipip; |
436 | int (*callback)(struct sk_buff *skb, u8 protocol, |
437 | int err); |
438 | }; |
439 | |
440 | int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo); |
441 | int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo); |
442 | |
443 | void xfrm_flush_gc(void); |
444 | void xfrm_state_delete_tunnel(struct xfrm_state *x); |
445 | |
446 | struct xfrm_type { |
447 | struct module *owner; |
448 | u8 proto; |
449 | u8 flags; |
450 | #define XFRM_TYPE_NON_FRAGMENT 1 |
451 | #define XFRM_TYPE_REPLAY_PROT 2 |
452 | #define XFRM_TYPE_LOCAL_COADDR 4 |
453 | #define XFRM_TYPE_REMOTE_COADDR 8 |
454 | |
455 | int (*init_state)(struct xfrm_state *x, |
456 | struct netlink_ext_ack *extack); |
457 | void (*destructor)(struct xfrm_state *); |
458 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
459 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
460 | int (*reject)(struct xfrm_state *, struct sk_buff *, |
461 | const struct flowi *); |
462 | }; |
463 | |
464 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
465 | void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); |
466 | |
467 | struct xfrm_type_offload { |
468 | struct module *owner; |
469 | u8 proto; |
470 | void (*encap)(struct xfrm_state *, struct sk_buff *pskb); |
471 | int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb); |
472 | int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features); |
473 | }; |
474 | |
475 | int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family); |
476 | void xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family); |
477 | void xfrm_set_type_offload(struct xfrm_state *x); |
478 | static inline void xfrm_unset_type_offload(struct xfrm_state *x) |
479 | { |
480 | if (!x->type_offload) |
481 | return; |
482 | |
483 | module_put(module: x->type_offload->owner); |
484 | x->type_offload = NULL; |
485 | } |
486 | |
487 | /** |
488 | * struct xfrm_mode_cbs - XFRM mode callbacks |
489 | * @owner: module owner or NULL |
490 | * @init_state: Add/init mode specific state in `xfrm_state *x` |
491 | * @clone_state: Copy mode specific values from `orig` to new state `x` |
492 | * @destroy_state: Cleanup mode specific state from `xfrm_state *x` |
493 | * @user_init: Process mode specific netlink attributes from user |
494 | * @copy_to_user: Add netlink attributes to `attrs` based on state in `x` |
495 | * @sa_len: Return space required to store mode specific netlink attributes |
496 | * @get_inner_mtu: Return avail payload space after removing encap overhead |
497 | * @input: Process received packet from SA using mode |
498 | * @output: Output given packet using mode |
499 | * @prepare_output: Add mode specific encapsulation to packet in skb. On return |
500 | * `transport_header` should point at ESP header, `network_header` should |
501 | * point at outer IP header and `mac_header` should opint at the |
502 | * protocol/nexthdr field of the outer IP. |
503 | * |
504 | * One should examine and understand the specific uses of these callbacks in |
505 | * xfrm for further detail on how and when these functions are called. RTSL. |
506 | */ |
507 | struct xfrm_mode_cbs { |
508 | struct module *owner; |
509 | int (*init_state)(struct xfrm_state *x); |
510 | int (*clone_state)(struct xfrm_state *x, struct xfrm_state *orig); |
511 | void (*destroy_state)(struct xfrm_state *x); |
512 | int (*user_init)(struct net *net, struct xfrm_state *x, |
513 | struct nlattr **attrs, |
514 | struct netlink_ext_ack *extack); |
515 | int (*copy_to_user)(struct xfrm_state *x, struct sk_buff *skb); |
516 | unsigned int (*sa_len)(const struct xfrm_state *x); |
517 | u32 (*get_inner_mtu)(struct xfrm_state *x, int outer_mtu); |
518 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); |
519 | int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb); |
520 | int (*prepare_output)(struct xfrm_state *x, struct sk_buff *skb); |
521 | }; |
522 | |
523 | int xfrm_register_mode_cbs(u8 mode, const struct xfrm_mode_cbs *mode_cbs); |
524 | void xfrm_unregister_mode_cbs(u8 mode); |
525 | |
526 | static inline int xfrm_af2proto(unsigned int family) |
527 | { |
528 | switch(family) { |
529 | case AF_INET: |
530 | return IPPROTO_IPIP; |
531 | case AF_INET6: |
532 | return IPPROTO_IPV6; |
533 | default: |
534 | return 0; |
535 | } |
536 | } |
537 | |
538 | static inline const struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) |
539 | { |
540 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || |
541 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) |
542 | return &x->inner_mode; |
543 | else |
544 | return &x->inner_mode_iaf; |
545 | } |
546 | |
547 | struct xfrm_tmpl { |
548 | /* id in template is interpreted as: |
549 | * daddr - destination of tunnel, may be zero for transport mode. |
550 | * spi - zero to acquire spi. Not zero if spi is static, then |
551 | * daddr must be fixed too. |
552 | * proto - AH/ESP/IPCOMP |
553 | */ |
554 | struct xfrm_id id; |
555 | |
556 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ |
557 | xfrm_address_t saddr; |
558 | |
559 | unsigned short encap_family; |
560 | |
561 | u32 reqid; |
562 | |
563 | /* Mode: transport, tunnel etc. */ |
564 | u8 mode; |
565 | |
566 | /* Sharing mode: unique, this session only, this user only etc. */ |
567 | u8 share; |
568 | |
569 | /* May skip this transfomration if no SA is found */ |
570 | u8 optional; |
571 | |
572 | /* Skip aalgos/ealgos/calgos checks. */ |
573 | u8 allalgs; |
574 | |
575 | /* Bit mask of algos allowed for acquisition */ |
576 | u32 aalgos; |
577 | u32 ealgos; |
578 | u32 calgos; |
579 | }; |
580 | |
581 | #define XFRM_MAX_DEPTH 6 |
582 | #define XFRM_MAX_OFFLOAD_DEPTH 1 |
583 | |
584 | struct xfrm_policy_walk_entry { |
585 | struct list_head all; |
586 | u8 dead; |
587 | }; |
588 | |
589 | struct xfrm_policy_walk { |
590 | struct xfrm_policy_walk_entry walk; |
591 | u8 type; |
592 | u32 seq; |
593 | }; |
594 | |
595 | struct xfrm_policy_queue { |
596 | struct sk_buff_head hold_queue; |
597 | struct timer_list hold_timer; |
598 | unsigned long timeout; |
599 | }; |
600 | |
601 | /** |
602 | * struct xfrm_policy - xfrm policy |
603 | * @xp_net: network namespace the policy lives in |
604 | * @bydst: hlist node for SPD hash table or rbtree list |
605 | * @byidx: hlist node for index hash table |
606 | * @state_cache_list: hlist head for policy cached xfrm states |
607 | * @lock: serialize changes to policy structure members |
608 | * @refcnt: reference count, freed once it reaches 0 |
609 | * @pos: kernel internal tie-breaker to determine age of policy |
610 | * @timer: timer |
611 | * @genid: generation, used to invalidate old policies |
612 | * @priority: priority, set by userspace |
613 | * @index: policy index (autogenerated) |
614 | * @if_id: virtual xfrm interface id |
615 | * @mark: packet mark |
616 | * @selector: selector |
617 | * @lft: liftime configuration data |
618 | * @curlft: liftime state |
619 | * @walk: list head on pernet policy list |
620 | * @polq: queue to hold packets while aqcuire operaion in progress |
621 | * @bydst_reinsert: policy tree node needs to be merged |
622 | * @type: XFRM_POLICY_TYPE_MAIN or _SUB |
623 | * @action: XFRM_POLICY_ALLOW or _BLOCK |
624 | * @flags: XFRM_POLICY_LOCALOK, XFRM_POLICY_ICMP |
625 | * @xfrm_nr: number of used templates in @xfrm_vec |
626 | * @family: protocol family |
627 | * @security: SELinux security label |
628 | * @xfrm_vec: array of templates to resolve state |
629 | * @rcu: rcu head, used to defer memory release |
630 | * @xdo: hardware offload state |
631 | */ |
632 | struct xfrm_policy { |
633 | possible_net_t xp_net; |
634 | struct hlist_node bydst; |
635 | struct hlist_node byidx; |
636 | |
637 | struct hlist_head state_cache_list; |
638 | |
639 | /* This lock only affects elements except for entry. */ |
640 | rwlock_t lock; |
641 | refcount_t refcnt; |
642 | u32 pos; |
643 | struct timer_list timer; |
644 | |
645 | atomic_t genid; |
646 | u32 priority; |
647 | u32 index; |
648 | u32 if_id; |
649 | struct xfrm_mark mark; |
650 | struct xfrm_selector selector; |
651 | struct xfrm_lifetime_cfg lft; |
652 | struct xfrm_lifetime_cur curlft; |
653 | struct xfrm_policy_walk_entry walk; |
654 | struct xfrm_policy_queue polq; |
655 | bool bydst_reinsert; |
656 | u8 type; |
657 | u8 action; |
658 | u8 flags; |
659 | u8 xfrm_nr; |
660 | u16 family; |
661 | struct xfrm_sec_ctx *security; |
662 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
663 | struct rcu_head rcu; |
664 | |
665 | struct xfrm_dev_offload xdo; |
666 | }; |
667 | |
668 | static inline struct net *xp_net(const struct xfrm_policy *xp) |
669 | { |
670 | return read_pnet(pnet: &xp->xp_net); |
671 | } |
672 | |
673 | struct xfrm_kmaddress { |
674 | xfrm_address_t local; |
675 | xfrm_address_t remote; |
676 | u32 reserved; |
677 | u16 family; |
678 | }; |
679 | |
680 | struct xfrm_migrate { |
681 | xfrm_address_t old_daddr; |
682 | xfrm_address_t old_saddr; |
683 | xfrm_address_t new_daddr; |
684 | xfrm_address_t new_saddr; |
685 | u8 proto; |
686 | u8 mode; |
687 | u16 reserved; |
688 | u32 reqid; |
689 | u16 old_family; |
690 | u16 new_family; |
691 | }; |
692 | |
693 | #define XFRM_KM_TIMEOUT 30 |
694 | /* what happened */ |
695 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR |
696 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE |
697 | |
698 | /* default aevent timeout in units of 100ms */ |
699 | #define XFRM_AE_ETIME 10 |
700 | /* Async Event timer multiplier */ |
701 | #define XFRM_AE_ETH_M 10 |
702 | /* default seq threshold size */ |
703 | #define XFRM_AE_SEQT_SIZE 2 |
704 | |
705 | struct xfrm_mgr { |
706 | struct list_head list; |
707 | int (*notify)(struct xfrm_state *x, const struct km_event *c); |
708 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); |
709 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
710 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
711 | int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); |
712 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
713 | int (*migrate)(const struct xfrm_selector *sel, |
714 | u8 dir, u8 type, |
715 | const struct xfrm_migrate *m, |
716 | int num_bundles, |
717 | const struct xfrm_kmaddress *k, |
718 | const struct xfrm_encap_tmpl *encap); |
719 | bool (*is_alive)(const struct km_event *c); |
720 | }; |
721 | |
722 | void xfrm_register_km(struct xfrm_mgr *km); |
723 | void xfrm_unregister_km(struct xfrm_mgr *km); |
724 | |
725 | struct xfrm_tunnel_skb_cb { |
726 | union { |
727 | struct inet_skb_parm h4; |
728 | struct inet6_skb_parm h6; |
729 | } header; |
730 | |
731 | union { |
732 | struct ip_tunnel *ip4; |
733 | struct ip6_tnl *ip6; |
734 | } tunnel; |
735 | }; |
736 | |
737 | #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) |
738 | |
739 | /* |
740 | * This structure is used for the duration where packets are being |
741 | * transformed by IPsec. As soon as the packet leaves IPsec the |
742 | * area beyond the generic IP part may be overwritten. |
743 | */ |
744 | struct xfrm_skb_cb { |
745 | struct xfrm_tunnel_skb_cb header; |
746 | |
747 | /* Sequence number for replay protection. */ |
748 | union { |
749 | struct { |
750 | __u32 low; |
751 | __u32 hi; |
752 | } output; |
753 | struct { |
754 | __be32 low; |
755 | __be32 hi; |
756 | } input; |
757 | } seq; |
758 | }; |
759 | |
760 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) |
761 | |
762 | /* |
763 | * This structure is used by the afinfo prepare_input/prepare_output functions |
764 | * to transmit header information to the mode input/output functions. |
765 | */ |
766 | struct xfrm_mode_skb_cb { |
767 | struct xfrm_tunnel_skb_cb header; |
768 | |
769 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ |
770 | __be16 id; |
771 | __be16 frag_off; |
772 | |
773 | /* IP header length (excluding options or extension headers). */ |
774 | u8 ihl; |
775 | |
776 | /* TOS for IPv4, class for IPv6. */ |
777 | u8 tos; |
778 | |
779 | /* TTL for IPv4, hop limitfor IPv6. */ |
780 | u8 ttl; |
781 | |
782 | /* Protocol for IPv4, NH for IPv6. */ |
783 | u8 protocol; |
784 | |
785 | /* Option length for IPv4, zero for IPv6. */ |
786 | u8 optlen; |
787 | |
788 | /* Used by IPv6 only, zero for IPv4. */ |
789 | u8 flow_lbl[3]; |
790 | }; |
791 | |
792 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) |
793 | |
794 | /* |
795 | * This structure is used by the input processing to locate the SPI and |
796 | * related information. |
797 | */ |
798 | struct xfrm_spi_skb_cb { |
799 | struct xfrm_tunnel_skb_cb header; |
800 | |
801 | unsigned int daddroff; |
802 | unsigned int family; |
803 | __be32 seq; |
804 | }; |
805 | |
806 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) |
807 | |
808 | #ifdef CONFIG_AUDITSYSCALL |
809 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
810 | { |
811 | struct audit_buffer *audit_buf = NULL; |
812 | |
813 | if (audit_enabled == AUDIT_OFF) |
814 | return NULL; |
815 | audit_buf = audit_log_start(ctx: audit_context(), GFP_ATOMIC, |
816 | AUDIT_MAC_IPSEC_EVENT); |
817 | if (audit_buf == NULL) |
818 | return NULL; |
819 | audit_log_format(ab: audit_buf, fmt: "op=%s", op); |
820 | return audit_buf; |
821 | } |
822 | |
823 | static inline void xfrm_audit_helper_usrinfo(bool task_valid, |
824 | struct audit_buffer *audit_buf) |
825 | { |
826 | const unsigned int auid = from_kuid(to: &init_user_ns, uid: task_valid ? |
827 | audit_get_loginuid(current) : |
828 | INVALID_UID); |
829 | const unsigned int ses = task_valid ? audit_get_sessionid(current) : |
830 | AUDIT_SID_UNSET; |
831 | |
832 | audit_log_format(ab: audit_buf, fmt: " auid=%u ses=%u", auid, ses); |
833 | audit_log_task_context(ab: audit_buf); |
834 | } |
835 | |
836 | void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid); |
837 | void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
838 | bool task_valid); |
839 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid); |
840 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid); |
841 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
842 | struct sk_buff *skb); |
843 | void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, |
844 | __be32 net_seq); |
845 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); |
846 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, |
847 | __be32 net_seq); |
848 | void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, |
849 | u8 proto); |
850 | #else |
851 | |
852 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, |
853 | bool task_valid) |
854 | { |
855 | } |
856 | |
857 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
858 | bool task_valid) |
859 | { |
860 | } |
861 | |
862 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, |
863 | bool task_valid) |
864 | { |
865 | } |
866 | |
867 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
868 | bool task_valid) |
869 | { |
870 | } |
871 | |
872 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
873 | struct sk_buff *skb) |
874 | { |
875 | } |
876 | |
877 | static inline void xfrm_audit_state_replay(struct xfrm_state *x, |
878 | struct sk_buff *skb, __be32 net_seq) |
879 | { |
880 | } |
881 | |
882 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, |
883 | u16 family) |
884 | { |
885 | } |
886 | |
887 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, |
888 | __be32 net_spi, __be32 net_seq) |
889 | { |
890 | } |
891 | |
892 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, |
893 | struct sk_buff *skb, u8 proto) |
894 | { |
895 | } |
896 | #endif /* CONFIG_AUDITSYSCALL */ |
897 | |
898 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
899 | { |
900 | if (likely(policy != NULL)) |
901 | refcount_inc(r: &policy->refcnt); |
902 | } |
903 | |
904 | void xfrm_policy_destroy(struct xfrm_policy *policy); |
905 | |
906 | static inline void xfrm_pol_put(struct xfrm_policy *policy) |
907 | { |
908 | if (refcount_dec_and_test(r: &policy->refcnt)) |
909 | xfrm_policy_destroy(policy); |
910 | } |
911 | |
912 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
913 | { |
914 | int i; |
915 | for (i = npols - 1; i >= 0; --i) |
916 | xfrm_pol_put(policy: pols[i]); |
917 | } |
918 | |
919 | void __xfrm_state_destroy(struct xfrm_state *, bool); |
920 | |
921 | static inline void __xfrm_state_put(struct xfrm_state *x) |
922 | { |
923 | refcount_dec(r: &x->refcnt); |
924 | } |
925 | |
926 | static inline void xfrm_state_put(struct xfrm_state *x) |
927 | { |
928 | if (refcount_dec_and_test(r: &x->refcnt)) |
929 | __xfrm_state_destroy(x, false); |
930 | } |
931 | |
932 | static inline void xfrm_state_put_sync(struct xfrm_state *x) |
933 | { |
934 | if (refcount_dec_and_test(r: &x->refcnt)) |
935 | __xfrm_state_destroy(x, true); |
936 | } |
937 | |
938 | static inline void xfrm_state_hold(struct xfrm_state *x) |
939 | { |
940 | refcount_inc(r: &x->refcnt); |
941 | } |
942 | |
943 | static inline bool addr_match(const void *token1, const void *token2, |
944 | unsigned int prefixlen) |
945 | { |
946 | const __be32 *a1 = token1; |
947 | const __be32 *a2 = token2; |
948 | unsigned int pdw; |
949 | unsigned int pbi; |
950 | |
951 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
952 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
953 | |
954 | if (pdw) |
955 | if (memcmp(p: a1, q: a2, size: pdw << 2)) |
956 | return false; |
957 | |
958 | if (pbi) { |
959 | __be32 mask; |
960 | |
961 | mask = htonl((0xffffffff) << (32 - pbi)); |
962 | |
963 | if ((a1[pdw] ^ a2[pdw]) & mask) |
964 | return false; |
965 | } |
966 | |
967 | return true; |
968 | } |
969 | |
970 | static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) |
971 | { |
972 | /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ |
973 | if (sizeof(long) == 4 && prefixlen == 0) |
974 | return true; |
975 | return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen))); |
976 | } |
977 | |
978 | static __inline__ |
979 | __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) |
980 | { |
981 | __be16 port; |
982 | switch(fl->flowi_proto) { |
983 | case IPPROTO_TCP: |
984 | case IPPROTO_UDP: |
985 | case IPPROTO_UDPLITE: |
986 | case IPPROTO_SCTP: |
987 | port = uli->ports.sport; |
988 | break; |
989 | case IPPROTO_ICMP: |
990 | case IPPROTO_ICMPV6: |
991 | port = htons(uli->icmpt.type); |
992 | break; |
993 | case IPPROTO_MH: |
994 | port = htons(uli->mht.type); |
995 | break; |
996 | case IPPROTO_GRE: |
997 | port = htons(ntohl(uli->gre_key) >> 16); |
998 | break; |
999 | default: |
1000 | port = 0; /*XXX*/ |
1001 | } |
1002 | return port; |
1003 | } |
1004 | |
1005 | static __inline__ |
1006 | __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) |
1007 | { |
1008 | __be16 port; |
1009 | switch(fl->flowi_proto) { |
1010 | case IPPROTO_TCP: |
1011 | case IPPROTO_UDP: |
1012 | case IPPROTO_UDPLITE: |
1013 | case IPPROTO_SCTP: |
1014 | port = uli->ports.dport; |
1015 | break; |
1016 | case IPPROTO_ICMP: |
1017 | case IPPROTO_ICMPV6: |
1018 | port = htons(uli->icmpt.code); |
1019 | break; |
1020 | case IPPROTO_GRE: |
1021 | port = htons(ntohl(uli->gre_key) & 0xffff); |
1022 | break; |
1023 | default: |
1024 | port = 0; /*XXX*/ |
1025 | } |
1026 | return port; |
1027 | } |
1028 | |
1029 | bool xfrm_selector_match(const struct xfrm_selector *sel, |
1030 | const struct flowi *fl, unsigned short family); |
1031 | |
1032 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
1033 | /* If neither has a context --> match |
1034 | * Otherwise, both must have a context and the sids, doi, alg must match |
1035 | */ |
1036 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
1037 | { |
1038 | return ((!s1 && !s2) || |
1039 | (s1 && s2 && |
1040 | (s1->ctx_sid == s2->ctx_sid) && |
1041 | (s1->ctx_doi == s2->ctx_doi) && |
1042 | (s1->ctx_alg == s2->ctx_alg))); |
1043 | } |
1044 | #else |
1045 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
1046 | { |
1047 | return true; |
1048 | } |
1049 | #endif |
1050 | |
1051 | /* A struct encoding bundle of transformations to apply to some set of flow. |
1052 | * |
1053 | * xdst->child points to the next element of bundle. |
1054 | * dst->xfrm points to an instanse of transformer. |
1055 | * |
1056 | * Due to unfortunate limitations of current routing cache, which we |
1057 | * have no time to fix, it mirrors struct rtable and bound to the same |
1058 | * routing key, including saddr,daddr. However, we can have many of |
1059 | * bundles differing by session id. All the bundles grow from a parent |
1060 | * policy rule. |
1061 | */ |
1062 | struct xfrm_dst { |
1063 | union { |
1064 | struct dst_entry dst; |
1065 | struct rtable rt; |
1066 | struct rt6_info rt6; |
1067 | } u; |
1068 | struct dst_entry *route; |
1069 | struct dst_entry *child; |
1070 | struct dst_entry *path; |
1071 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; |
1072 | int num_pols, num_xfrms; |
1073 | u32 xfrm_genid; |
1074 | u32 policy_genid; |
1075 | u32 route_mtu_cached; |
1076 | u32 child_mtu_cached; |
1077 | u32 route_cookie; |
1078 | u32 path_cookie; |
1079 | }; |
1080 | |
1081 | static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst) |
1082 | { |
1083 | #ifdef CONFIG_XFRM |
1084 | if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) { |
1085 | const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst; |
1086 | |
1087 | return xdst->path; |
1088 | } |
1089 | #endif |
1090 | return (struct dst_entry *) dst; |
1091 | } |
1092 | |
1093 | static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst) |
1094 | { |
1095 | #ifdef CONFIG_XFRM |
1096 | if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) { |
1097 | struct xfrm_dst *xdst = (struct xfrm_dst *) dst; |
1098 | return xdst->child; |
1099 | } |
1100 | #endif |
1101 | return NULL; |
1102 | } |
1103 | |
1104 | #ifdef CONFIG_XFRM |
1105 | static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child) |
1106 | { |
1107 | xdst->child = child; |
1108 | } |
1109 | |
1110 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
1111 | { |
1112 | xfrm_pols_put(pols: xdst->pols, npols: xdst->num_pols); |
1113 | dst_release(dst: xdst->route); |
1114 | if (likely(xdst->u.dst.xfrm)) |
1115 | xfrm_state_put(x: xdst->u.dst.xfrm); |
1116 | } |
1117 | #endif |
1118 | |
1119 | void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); |
1120 | |
1121 | struct xfrm_if_parms { |
1122 | int link; /* ifindex of underlying L2 interface */ |
1123 | u32 if_id; /* interface identifier */ |
1124 | bool collect_md; |
1125 | }; |
1126 | |
1127 | struct xfrm_if { |
1128 | struct xfrm_if __rcu *next; /* next interface in list */ |
1129 | struct net_device *dev; /* virtual device associated with interface */ |
1130 | struct net *net; /* netns for packet i/o */ |
1131 | struct xfrm_if_parms p; /* interface parms */ |
1132 | |
1133 | struct gro_cells gro_cells; |
1134 | }; |
1135 | |
1136 | struct xfrm_offload { |
1137 | /* Output sequence number for replay protection on offloading. */ |
1138 | struct { |
1139 | __u32 low; |
1140 | __u32 hi; |
1141 | } seq; |
1142 | |
1143 | __u32 flags; |
1144 | #define SA_DELETE_REQ 1 |
1145 | #define CRYPTO_DONE 2 |
1146 | #define CRYPTO_NEXT_DONE 4 |
1147 | #define CRYPTO_FALLBACK 8 |
1148 | #define XFRM_GSO_SEGMENT 16 |
1149 | #define XFRM_GRO 32 |
1150 | /* 64 is free */ |
1151 | #define XFRM_DEV_RESUME 128 |
1152 | #define XFRM_XMIT 256 |
1153 | |
1154 | __u32 status; |
1155 | #define CRYPTO_SUCCESS 1 |
1156 | #define CRYPTO_GENERIC_ERROR 2 |
1157 | #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4 |
1158 | #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8 |
1159 | #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16 |
1160 | #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32 |
1161 | #define CRYPTO_INVALID_PACKET_SYNTAX 64 |
1162 | #define CRYPTO_INVALID_PROTOCOL 128 |
1163 | |
1164 | /* Used to keep whole l2 header for transport mode GRO */ |
1165 | __u32 orig_mac_len; |
1166 | |
1167 | __u8 proto; |
1168 | __u8 inner_ipproto; |
1169 | }; |
1170 | |
1171 | struct sec_path { |
1172 | int len; |
1173 | int olen; |
1174 | int verified_cnt; |
1175 | |
1176 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
1177 | struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH]; |
1178 | }; |
1179 | |
1180 | struct sec_path *secpath_set(struct sk_buff *skb); |
1181 | |
1182 | static inline void |
1183 | secpath_reset(struct sk_buff *skb) |
1184 | { |
1185 | #ifdef CONFIG_XFRM |
1186 | skb_ext_del(skb, id: SKB_EXT_SEC_PATH); |
1187 | #endif |
1188 | } |
1189 | |
1190 | static inline int |
1191 | xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) |
1192 | { |
1193 | switch (family) { |
1194 | case AF_INET: |
1195 | return addr->a4 == 0; |
1196 | case AF_INET6: |
1197 | return ipv6_addr_any(a: &addr->in6); |
1198 | } |
1199 | return 0; |
1200 | } |
1201 | |
1202 | static inline int |
1203 | __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1204 | { |
1205 | return (tmpl->saddr.a4 && |
1206 | tmpl->saddr.a4 != x->props.saddr.a4); |
1207 | } |
1208 | |
1209 | static inline int |
1210 | __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1211 | { |
1212 | return (!ipv6_addr_any(a: (struct in6_addr*)&tmpl->saddr) && |
1213 | !ipv6_addr_equal(a1: (struct in6_addr *)&tmpl->saddr, a2: (struct in6_addr*)&x->props.saddr)); |
1214 | } |
1215 | |
1216 | static inline int |
1217 | xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) |
1218 | { |
1219 | switch (family) { |
1220 | case AF_INET: |
1221 | return __xfrm4_state_addr_cmp(tmpl, x); |
1222 | case AF_INET6: |
1223 | return __xfrm6_state_addr_cmp(tmpl, x); |
1224 | } |
1225 | return !0; |
1226 | } |
1227 | |
1228 | #ifdef CONFIG_XFRM |
1229 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
1230 | { |
1231 | struct sec_path *sp = skb_sec_path(skb); |
1232 | |
1233 | return sp->xvec[sp->len - 1]; |
1234 | } |
1235 | #endif |
1236 | |
1237 | static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb) |
1238 | { |
1239 | #ifdef CONFIG_XFRM |
1240 | struct sec_path *sp = skb_sec_path(skb); |
1241 | |
1242 | if (!sp || !sp->olen || sp->len != sp->olen) |
1243 | return NULL; |
1244 | |
1245 | return &sp->ovec[sp->olen - 1]; |
1246 | #else |
1247 | return NULL; |
1248 | #endif |
1249 | } |
1250 | |
1251 | #ifdef CONFIG_XFRM |
1252 | int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, |
1253 | unsigned short family); |
1254 | |
1255 | static inline bool __xfrm_check_nopolicy(struct net *net, struct sk_buff *skb, |
1256 | int dir) |
1257 | { |
1258 | if (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) |
1259 | return net->xfrm.policy_default[dir] == XFRM_USERPOLICY_ACCEPT; |
1260 | |
1261 | return false; |
1262 | } |
1263 | |
1264 | static inline bool __xfrm_check_dev_nopolicy(struct sk_buff *skb, |
1265 | int dir, unsigned short family) |
1266 | { |
1267 | if (dir != XFRM_POLICY_OUT && family == AF_INET) { |
1268 | /* same dst may be used for traffic originating from |
1269 | * devices with different policy settings. |
1270 | */ |
1271 | return IPCB(skb)->flags & IPSKB_NOPOLICY; |
1272 | } |
1273 | return skb_dst(skb) && (skb_dst(skb)->flags & DST_NOPOLICY); |
1274 | } |
1275 | |
1276 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
1277 | struct sk_buff *skb, |
1278 | unsigned int family, int reverse) |
1279 | { |
1280 | struct net *net = dev_net(dev: skb->dev); |
1281 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
1282 | struct xfrm_offload *xo = xfrm_offload(skb); |
1283 | struct xfrm_state *x; |
1284 | |
1285 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
1286 | return __xfrm_policy_check(sk, dir: ndir, skb, family); |
1287 | |
1288 | if (xo) { |
1289 | x = xfrm_input_state(skb); |
1290 | if (x->xso.type == XFRM_DEV_OFFLOAD_PACKET) { |
1291 | bool check = (xo->flags & CRYPTO_DONE) && |
1292 | (xo->status & CRYPTO_SUCCESS); |
1293 | |
1294 | /* The packets here are plain ones and secpath was |
1295 | * needed to indicate that hardware already handled |
1296 | * them and there is no need to do nothing in addition. |
1297 | * |
1298 | * Consume secpath which was set by drivers. |
1299 | */ |
1300 | secpath_reset(skb); |
1301 | return check; |
1302 | } |
1303 | } |
1304 | |
1305 | return __xfrm_check_nopolicy(net, skb, dir) || |
1306 | __xfrm_check_dev_nopolicy(skb, dir, family) || |
1307 | __xfrm_policy_check(sk, dir: ndir, skb, family); |
1308 | } |
1309 | |
1310 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) |
1311 | { |
1312 | return __xfrm_policy_check2(sk, dir, skb, family, reverse: 0); |
1313 | } |
1314 | |
1315 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
1316 | { |
1317 | return xfrm_policy_check(sk, dir, skb, AF_INET); |
1318 | } |
1319 | |
1320 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
1321 | { |
1322 | return xfrm_policy_check(sk, dir, skb, AF_INET6); |
1323 | } |
1324 | |
1325 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1326 | struct sk_buff *skb) |
1327 | { |
1328 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, reverse: 1); |
1329 | } |
1330 | |
1331 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, |
1332 | struct sk_buff *skb) |
1333 | { |
1334 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, reverse: 1); |
1335 | } |
1336 | |
1337 | int __xfrm_decode_session(struct net *net, struct sk_buff *skb, struct flowi *fl, |
1338 | unsigned int family, int reverse); |
1339 | |
1340 | static inline int xfrm_decode_session(struct net *net, struct sk_buff *skb, struct flowi *fl, |
1341 | unsigned int family) |
1342 | { |
1343 | return __xfrm_decode_session(net, skb, fl, family, reverse: 0); |
1344 | } |
1345 | |
1346 | static inline int xfrm_decode_session_reverse(struct net *net, struct sk_buff *skb, |
1347 | struct flowi *fl, |
1348 | unsigned int family) |
1349 | { |
1350 | return __xfrm_decode_session(net, skb, fl, family, reverse: 1); |
1351 | } |
1352 | |
1353 | int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
1354 | |
1355 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) |
1356 | { |
1357 | struct net *net = dev_net(dev: skb->dev); |
1358 | |
1359 | if (!net->xfrm.policy_count[XFRM_POLICY_OUT] && |
1360 | net->xfrm.policy_default[XFRM_POLICY_OUT] == XFRM_USERPOLICY_ACCEPT) |
1361 | return true; |
1362 | |
1363 | return (skb_dst(skb)->flags & DST_NOXFRM) || |
1364 | __xfrm_route_forward(skb, family); |
1365 | } |
1366 | |
1367 | static inline int xfrm4_route_forward(struct sk_buff *skb) |
1368 | { |
1369 | return xfrm_route_forward(skb, AF_INET); |
1370 | } |
1371 | |
1372 | static inline int xfrm6_route_forward(struct sk_buff *skb) |
1373 | { |
1374 | return xfrm_route_forward(skb, AF_INET6); |
1375 | } |
1376 | |
1377 | int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk); |
1378 | |
1379 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) |
1380 | { |
1381 | if (!sk_fullsock(sk: osk)) |
1382 | return 0; |
1383 | sk->sk_policy[0] = NULL; |
1384 | sk->sk_policy[1] = NULL; |
1385 | if (unlikely(osk->sk_policy[0] || osk->sk_policy[1])) |
1386 | return __xfrm_sk_clone_policy(sk, osk); |
1387 | return 0; |
1388 | } |
1389 | |
1390 | int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1391 | |
1392 | static inline void xfrm_sk_free_policy(struct sock *sk) |
1393 | { |
1394 | struct xfrm_policy *pol; |
1395 | |
1396 | pol = rcu_dereference_protected(sk->sk_policy[0], 1); |
1397 | if (unlikely(pol != NULL)) { |
1398 | xfrm_policy_delete(pol, dir: XFRM_POLICY_MAX); |
1399 | sk->sk_policy[0] = NULL; |
1400 | } |
1401 | pol = rcu_dereference_protected(sk->sk_policy[1], 1); |
1402 | if (unlikely(pol != NULL)) { |
1403 | xfrm_policy_delete(pol, dir: XFRM_POLICY_MAX+1); |
1404 | sk->sk_policy[1] = NULL; |
1405 | } |
1406 | } |
1407 | |
1408 | #else |
1409 | |
1410 | static inline void xfrm_sk_free_policy(struct sock *sk) {} |
1411 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; } |
1412 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } |
1413 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } |
1414 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
1415 | { |
1416 | return 1; |
1417 | } |
1418 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
1419 | { |
1420 | return 1; |
1421 | } |
1422 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) |
1423 | { |
1424 | return 1; |
1425 | } |
1426 | static inline int xfrm_decode_session_reverse(struct net *net, struct sk_buff *skb, |
1427 | struct flowi *fl, |
1428 | unsigned int family) |
1429 | { |
1430 | return -ENOSYS; |
1431 | } |
1432 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1433 | struct sk_buff *skb) |
1434 | { |
1435 | return 1; |
1436 | } |
1437 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, |
1438 | struct sk_buff *skb) |
1439 | { |
1440 | return 1; |
1441 | } |
1442 | #endif |
1443 | |
1444 | static __inline__ |
1445 | xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) |
1446 | { |
1447 | switch (family){ |
1448 | case AF_INET: |
1449 | return (xfrm_address_t *)&fl->u.ip4.daddr; |
1450 | case AF_INET6: |
1451 | return (xfrm_address_t *)&fl->u.ip6.daddr; |
1452 | } |
1453 | return NULL; |
1454 | } |
1455 | |
1456 | static __inline__ |
1457 | xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) |
1458 | { |
1459 | switch (family){ |
1460 | case AF_INET: |
1461 | return (xfrm_address_t *)&fl->u.ip4.saddr; |
1462 | case AF_INET6: |
1463 | return (xfrm_address_t *)&fl->u.ip6.saddr; |
1464 | } |
1465 | return NULL; |
1466 | } |
1467 | |
1468 | static __inline__ |
1469 | void xfrm_flowi_addr_get(const struct flowi *fl, |
1470 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
1471 | unsigned short family) |
1472 | { |
1473 | switch(family) { |
1474 | case AF_INET: |
1475 | memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); |
1476 | memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); |
1477 | break; |
1478 | case AF_INET6: |
1479 | saddr->in6 = fl->u.ip6.saddr; |
1480 | daddr->in6 = fl->u.ip6.daddr; |
1481 | break; |
1482 | } |
1483 | } |
1484 | |
1485 | static __inline__ int |
1486 | __xfrm4_state_addr_check(const struct xfrm_state *x, |
1487 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) |
1488 | { |
1489 | if (daddr->a4 == x->id.daddr.a4 && |
1490 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) |
1491 | return 1; |
1492 | return 0; |
1493 | } |
1494 | |
1495 | static __inline__ int |
1496 | __xfrm6_state_addr_check(const struct xfrm_state *x, |
1497 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) |
1498 | { |
1499 | if (ipv6_addr_equal(a1: (struct in6_addr *)daddr, a2: (struct in6_addr *)&x->id.daddr) && |
1500 | (ipv6_addr_equal(a1: (struct in6_addr *)saddr, a2: (struct in6_addr *)&x->props.saddr) || |
1501 | ipv6_addr_any(a: (struct in6_addr *)saddr) || |
1502 | ipv6_addr_any(a: (struct in6_addr *)&x->props.saddr))) |
1503 | return 1; |
1504 | return 0; |
1505 | } |
1506 | |
1507 | static __inline__ int |
1508 | xfrm_state_addr_check(const struct xfrm_state *x, |
1509 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
1510 | unsigned short family) |
1511 | { |
1512 | switch (family) { |
1513 | case AF_INET: |
1514 | return __xfrm4_state_addr_check(x, daddr, saddr); |
1515 | case AF_INET6: |
1516 | return __xfrm6_state_addr_check(x, daddr, saddr); |
1517 | } |
1518 | return 0; |
1519 | } |
1520 | |
1521 | static __inline__ int |
1522 | xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, |
1523 | unsigned short family) |
1524 | { |
1525 | switch (family) { |
1526 | case AF_INET: |
1527 | return __xfrm4_state_addr_check(x, |
1528 | daddr: (const xfrm_address_t *)&fl->u.ip4.daddr, |
1529 | saddr: (const xfrm_address_t *)&fl->u.ip4.saddr); |
1530 | case AF_INET6: |
1531 | return __xfrm6_state_addr_check(x, |
1532 | daddr: (const xfrm_address_t *)&fl->u.ip6.daddr, |
1533 | saddr: (const xfrm_address_t *)&fl->u.ip6.saddr); |
1534 | } |
1535 | return 0; |
1536 | } |
1537 | |
1538 | static inline int xfrm_state_kern(const struct xfrm_state *x) |
1539 | { |
1540 | return atomic_read(v: &x->tunnel_users); |
1541 | } |
1542 | |
1543 | static inline bool xfrm_id_proto_valid(u8 proto) |
1544 | { |
1545 | switch (proto) { |
1546 | case IPPROTO_AH: |
1547 | case IPPROTO_ESP: |
1548 | case IPPROTO_COMP: |
1549 | #if IS_ENABLED(CONFIG_IPV6) |
1550 | case IPPROTO_ROUTING: |
1551 | case IPPROTO_DSTOPTS: |
1552 | #endif |
1553 | return true; |
1554 | default: |
1555 | return false; |
1556 | } |
1557 | } |
1558 | |
1559 | /* IPSEC_PROTO_ANY only matches 3 IPsec protocols, 0 could match all. */ |
1560 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1561 | { |
1562 | return (!userproto || proto == userproto || |
1563 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || |
1564 | proto == IPPROTO_ESP || |
1565 | proto == IPPROTO_COMP))); |
1566 | } |
1567 | |
1568 | /* |
1569 | * xfrm algorithm information |
1570 | */ |
1571 | struct xfrm_algo_aead_info { |
1572 | char *geniv; |
1573 | u16 icv_truncbits; |
1574 | }; |
1575 | |
1576 | struct xfrm_algo_auth_info { |
1577 | u16 icv_truncbits; |
1578 | u16 icv_fullbits; |
1579 | }; |
1580 | |
1581 | struct xfrm_algo_encr_info { |
1582 | char *geniv; |
1583 | u16 blockbits; |
1584 | u16 defkeybits; |
1585 | }; |
1586 | |
1587 | struct xfrm_algo_comp_info { |
1588 | u16 threshold; |
1589 | }; |
1590 | |
1591 | struct xfrm_algo_desc { |
1592 | char *name; |
1593 | char *compat; |
1594 | u8 available:1; |
1595 | u8 pfkey_supported:1; |
1596 | union { |
1597 | struct xfrm_algo_aead_info aead; |
1598 | struct xfrm_algo_auth_info auth; |
1599 | struct xfrm_algo_encr_info encr; |
1600 | struct xfrm_algo_comp_info comp; |
1601 | } uinfo; |
1602 | struct sadb_alg desc; |
1603 | }; |
1604 | |
1605 | /* XFRM protocol handlers. */ |
1606 | struct xfrm4_protocol { |
1607 | int (*handler)(struct sk_buff *skb); |
1608 | int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, |
1609 | int encap_type); |
1610 | int (*cb_handler)(struct sk_buff *skb, int err); |
1611 | int (*err_handler)(struct sk_buff *skb, u32 info); |
1612 | |
1613 | struct xfrm4_protocol __rcu *next; |
1614 | int priority; |
1615 | }; |
1616 | |
1617 | struct xfrm6_protocol { |
1618 | int (*handler)(struct sk_buff *skb); |
1619 | int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, |
1620 | int encap_type); |
1621 | int (*cb_handler)(struct sk_buff *skb, int err); |
1622 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, |
1623 | u8 type, u8 code, int offset, __be32 info); |
1624 | |
1625 | struct xfrm6_protocol __rcu *next; |
1626 | int priority; |
1627 | }; |
1628 | |
1629 | /* XFRM tunnel handlers. */ |
1630 | struct xfrm_tunnel { |
1631 | int (*handler)(struct sk_buff *skb); |
1632 | int (*cb_handler)(struct sk_buff *skb, int err); |
1633 | int (*err_handler)(struct sk_buff *skb, u32 info); |
1634 | |
1635 | struct xfrm_tunnel __rcu *next; |
1636 | int priority; |
1637 | }; |
1638 | |
1639 | struct xfrm6_tunnel { |
1640 | int (*handler)(struct sk_buff *skb); |
1641 | int (*cb_handler)(struct sk_buff *skb, int err); |
1642 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, |
1643 | u8 type, u8 code, int offset, __be32 info); |
1644 | struct xfrm6_tunnel __rcu *next; |
1645 | int priority; |
1646 | }; |
1647 | |
1648 | void xfrm_init(void); |
1649 | void xfrm4_init(void); |
1650 | int xfrm_state_init(struct net *net); |
1651 | void xfrm_state_fini(struct net *net); |
1652 | void xfrm4_state_init(void); |
1653 | void xfrm4_protocol_init(void); |
1654 | #ifdef CONFIG_XFRM |
1655 | int xfrm6_init(void); |
1656 | void xfrm6_fini(void); |
1657 | int xfrm6_state_init(void); |
1658 | void xfrm6_state_fini(void); |
1659 | int xfrm6_protocol_init(void); |
1660 | void xfrm6_protocol_fini(void); |
1661 | #else |
1662 | static inline int xfrm6_init(void) |
1663 | { |
1664 | return 0; |
1665 | } |
1666 | static inline void xfrm6_fini(void) |
1667 | { |
1668 | ; |
1669 | } |
1670 | #endif |
1671 | |
1672 | #ifdef CONFIG_XFRM_STATISTICS |
1673 | int xfrm_proc_init(struct net *net); |
1674 | void xfrm_proc_fini(struct net *net); |
1675 | #endif |
1676 | |
1677 | int xfrm_sysctl_init(struct net *net); |
1678 | #ifdef CONFIG_SYSCTL |
1679 | void xfrm_sysctl_fini(struct net *net); |
1680 | #else |
1681 | static inline void xfrm_sysctl_fini(struct net *net) |
1682 | { |
1683 | } |
1684 | #endif |
1685 | |
1686 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
1687 | struct xfrm_address_filter *filter); |
1688 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
1689 | int (*func)(struct xfrm_state *, int, void*), void *); |
1690 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); |
1691 | struct xfrm_state *xfrm_state_alloc(struct net *net); |
1692 | void xfrm_state_free(struct xfrm_state *x); |
1693 | struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, |
1694 | const xfrm_address_t *saddr, |
1695 | const struct flowi *fl, |
1696 | struct xfrm_tmpl *tmpl, |
1697 | struct xfrm_policy *pol, int *err, |
1698 | unsigned short family, u32 if_id); |
1699 | struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id, |
1700 | xfrm_address_t *daddr, |
1701 | xfrm_address_t *saddr, |
1702 | unsigned short family, |
1703 | u8 mode, u8 proto, u32 reqid); |
1704 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
1705 | unsigned short family); |
1706 | int xfrm_state_check_expire(struct xfrm_state *x); |
1707 | void xfrm_state_update_stats(struct net *net); |
1708 | #ifdef CONFIG_XFRM_OFFLOAD |
1709 | static inline void xfrm_dev_state_update_stats(struct xfrm_state *x) |
1710 | { |
1711 | struct xfrm_dev_offload *xdo = &x->xso; |
1712 | struct net_device *dev = READ_ONCE(xdo->dev); |
1713 | |
1714 | if (dev && dev->xfrmdev_ops && |
1715 | dev->xfrmdev_ops->xdo_dev_state_update_stats) |
1716 | dev->xfrmdev_ops->xdo_dev_state_update_stats(x); |
1717 | |
1718 | } |
1719 | #else |
1720 | static inline void xfrm_dev_state_update_stats(struct xfrm_state *x) {} |
1721 | #endif |
1722 | void xfrm_state_insert(struct xfrm_state *x); |
1723 | int xfrm_state_add(struct xfrm_state *x); |
1724 | int xfrm_state_update(struct xfrm_state *x); |
1725 | struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, |
1726 | const xfrm_address_t *daddr, __be32 spi, |
1727 | u8 proto, unsigned short family); |
1728 | struct xfrm_state *xfrm_input_state_lookup(struct net *net, u32 mark, |
1729 | const xfrm_address_t *daddr, |
1730 | __be32 spi, u8 proto, |
1731 | unsigned short family); |
1732 | struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
1733 | const xfrm_address_t *daddr, |
1734 | const xfrm_address_t *saddr, |
1735 | u8 proto, |
1736 | unsigned short family); |
1737 | #ifdef CONFIG_XFRM_SUB_POLICY |
1738 | void xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, |
1739 | unsigned short family); |
1740 | void xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, |
1741 | unsigned short family); |
1742 | #else |
1743 | static inline void xfrm_tmpl_sort(struct xfrm_tmpl **d, struct xfrm_tmpl **s, |
1744 | int n, unsigned short family) |
1745 | { |
1746 | } |
1747 | |
1748 | static inline void xfrm_state_sort(struct xfrm_state **d, struct xfrm_state **s, |
1749 | int n, unsigned short family) |
1750 | { |
1751 | } |
1752 | #endif |
1753 | |
1754 | struct xfrmk_sadinfo { |
1755 | u32 sadhcnt; /* current hash bkts */ |
1756 | u32 sadhmcnt; /* max allowed hash bkts */ |
1757 | u32 sadcnt; /* current running count */ |
1758 | }; |
1759 | |
1760 | struct xfrmk_spdinfo { |
1761 | u32 incnt; |
1762 | u32 outcnt; |
1763 | u32 fwdcnt; |
1764 | u32 inscnt; |
1765 | u32 outscnt; |
1766 | u32 fwdscnt; |
1767 | u32 spdhcnt; |
1768 | u32 spdhmcnt; |
1769 | }; |
1770 | |
1771 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq, u32 pcpu_num); |
1772 | int xfrm_state_delete(struct xfrm_state *x); |
1773 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync); |
1774 | int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid); |
1775 | int xfrm_dev_policy_flush(struct net *net, struct net_device *dev, |
1776 | bool task_valid); |
1777 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); |
1778 | void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); |
1779 | u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); |
1780 | int xfrm_init_replay(struct xfrm_state *x, struct netlink_ext_ack *extack); |
1781 | u32 xfrm_state_mtu(struct xfrm_state *x, int mtu); |
1782 | int __xfrm_init_state(struct xfrm_state *x, struct netlink_ext_ack *extack); |
1783 | int xfrm_init_state(struct xfrm_state *x); |
1784 | int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); |
1785 | int xfrm_input_resume(struct sk_buff *skb, int nexthdr); |
1786 | int xfrm_trans_queue_net(struct net *net, struct sk_buff *skb, |
1787 | int (*finish)(struct net *, struct sock *, |
1788 | struct sk_buff *)); |
1789 | int xfrm_trans_queue(struct sk_buff *skb, |
1790 | int (*finish)(struct net *, struct sock *, |
1791 | struct sk_buff *)); |
1792 | int xfrm_output_resume(struct sock *sk, struct sk_buff *skb, int err); |
1793 | int xfrm_output(struct sock *sk, struct sk_buff *skb); |
1794 | int xfrm4_tunnel_check_size(struct sk_buff *skb); |
1795 | #if IS_ENABLED(CONFIG_IPV6) |
1796 | int xfrm6_tunnel_check_size(struct sk_buff *skb); |
1797 | #else |
1798 | static inline int xfrm6_tunnel_check_size(struct sk_buff *skb) |
1799 | { |
1800 | return -EMSGSIZE; |
1801 | } |
1802 | #endif |
1803 | |
1804 | #if IS_ENABLED(CONFIG_NET_PKTGEN) |
1805 | int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb); |
1806 | #endif |
1807 | |
1808 | void xfrm_local_error(struct sk_buff *skb, int mtu); |
1809 | int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
1810 | int encap_type); |
1811 | int xfrm4_transport_finish(struct sk_buff *skb, int async); |
1812 | int xfrm4_rcv(struct sk_buff *skb); |
1813 | |
1814 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) |
1815 | { |
1816 | XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; |
1817 | XFRM_SPI_SKB_CB(skb)->family = AF_INET; |
1818 | XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); |
1819 | return xfrm_input(skb, nexthdr, spi, encap_type: 0); |
1820 | } |
1821 | |
1822 | int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
1823 | int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); |
1824 | int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol); |
1825 | int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1826 | int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); |
1827 | void xfrm4_local_error(struct sk_buff *skb, u32 mtu); |
1828 | int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi, |
1829 | struct ip6_tnl *t); |
1830 | int xfrm6_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
1831 | int encap_type); |
1832 | int xfrm6_transport_finish(struct sk_buff *skb, int async); |
1833 | int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t); |
1834 | int xfrm6_rcv(struct sk_buff *skb); |
1835 | int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, |
1836 | xfrm_address_t *saddr, u8 proto); |
1837 | void xfrm6_local_error(struct sk_buff *skb, u32 mtu); |
1838 | int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol); |
1839 | int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol); |
1840 | int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
1841 | int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); |
1842 | __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
1843 | __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); |
1844 | int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
1845 | |
1846 | #ifdef CONFIG_XFRM |
1847 | void xfrm6_local_rxpmtu(struct sk_buff *skb, u32 mtu); |
1848 | int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1849 | int xfrm6_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1850 | struct sk_buff *xfrm4_gro_udp_encap_rcv(struct sock *sk, struct list_head *head, |
1851 | struct sk_buff *skb); |
1852 | struct sk_buff *xfrm6_gro_udp_encap_rcv(struct sock *sk, struct list_head *head, |
1853 | struct sk_buff *skb); |
1854 | int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval, |
1855 | int optlen); |
1856 | #else |
1857 | static inline int xfrm_user_policy(struct sock *sk, int optname, |
1858 | sockptr_t optval, int optlen) |
1859 | { |
1860 | return -ENOPROTOOPT; |
1861 | } |
1862 | #endif |
1863 | |
1864 | struct dst_entry *__xfrm_dst_lookup(int family, const struct xfrm_dst_lookup_params *params); |
1865 | |
1866 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
1867 | |
1868 | void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
1869 | int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, |
1870 | int (*func)(struct xfrm_policy *, int, int, void*), |
1871 | void *); |
1872 | void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); |
1873 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
1874 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, |
1875 | const struct xfrm_mark *mark, |
1876 | u32 if_id, u8 type, int dir, |
1877 | struct xfrm_selector *sel, |
1878 | struct xfrm_sec_ctx *ctx, int delete, |
1879 | int *err); |
1880 | struct xfrm_policy *xfrm_policy_byid(struct net *net, |
1881 | const struct xfrm_mark *mark, u32 if_id, |
1882 | u8 type, int dir, u32 id, int delete, |
1883 | int *err); |
1884 | int xfrm_policy_flush(struct net *net, u8 type, bool task_valid); |
1885 | void xfrm_policy_hash_rebuild(struct net *net); |
1886 | u32 xfrm_get_acqseq(void); |
1887 | int verify_spi_info(u8 proto, u32 min, u32 max, struct netlink_ext_ack *extack); |
1888 | int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi, |
1889 | struct netlink_ext_ack *extack); |
1890 | struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, |
1891 | u8 mode, u32 reqid, u32 if_id, u32 pcpu_num, u8 proto, |
1892 | const xfrm_address_t *daddr, |
1893 | const xfrm_address_t *saddr, int create, |
1894 | unsigned short family); |
1895 | int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
1896 | |
1897 | #ifdef CONFIG_XFRM_MIGRATE |
1898 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1899 | const struct xfrm_migrate *m, int num_bundles, |
1900 | const struct xfrm_kmaddress *k, |
1901 | const struct xfrm_encap_tmpl *encap); |
1902 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net, |
1903 | u32 if_id); |
1904 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
1905 | struct xfrm_migrate *m, |
1906 | struct xfrm_encap_tmpl *encap, |
1907 | struct net *net, |
1908 | struct xfrm_user_offload *xuo, |
1909 | struct netlink_ext_ack *extack); |
1910 | int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1911 | struct xfrm_migrate *m, int num_bundles, |
1912 | struct xfrm_kmaddress *k, struct net *net, |
1913 | struct xfrm_encap_tmpl *encap, u32 if_id, |
1914 | struct netlink_ext_ack *extack, |
1915 | struct xfrm_user_offload *xuo); |
1916 | #endif |
1917 | |
1918 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
1919 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); |
1920 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, |
1921 | xfrm_address_t *addr); |
1922 | |
1923 | void xfrm_input_init(void); |
1924 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); |
1925 | |
1926 | void xfrm_probe_algs(void); |
1927 | int xfrm_count_pfkey_auth_supported(void); |
1928 | int xfrm_count_pfkey_enc_supported(void); |
1929 | struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); |
1930 | struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); |
1931 | struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); |
1932 | struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); |
1933 | struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); |
1934 | struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); |
1935 | struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); |
1936 | struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); |
1937 | struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, |
1938 | int probe); |
1939 | |
1940 | static inline bool xfrm6_addr_equal(const xfrm_address_t *a, |
1941 | const xfrm_address_t *b) |
1942 | { |
1943 | return ipv6_addr_equal(a1: (const struct in6_addr *)a, |
1944 | a2: (const struct in6_addr *)b); |
1945 | } |
1946 | |
1947 | static inline bool xfrm_addr_equal(const xfrm_address_t *a, |
1948 | const xfrm_address_t *b, |
1949 | sa_family_t family) |
1950 | { |
1951 | switch (family) { |
1952 | default: |
1953 | case AF_INET: |
1954 | return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; |
1955 | case AF_INET6: |
1956 | return xfrm6_addr_equal(a, b); |
1957 | } |
1958 | } |
1959 | |
1960 | static inline int xfrm_policy_id2dir(u32 index) |
1961 | { |
1962 | return index & 7; |
1963 | } |
1964 | |
1965 | #ifdef CONFIG_XFRM |
1966 | void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq); |
1967 | int xfrm_replay_check(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq); |
1968 | void xfrm_replay_notify(struct xfrm_state *x, int event); |
1969 | int xfrm_replay_overflow(struct xfrm_state *x, struct sk_buff *skb); |
1970 | int xfrm_replay_recheck(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq); |
1971 | |
1972 | static inline int xfrm_aevent_is_on(struct net *net) |
1973 | { |
1974 | struct sock *nlsk; |
1975 | int ret = 0; |
1976 | |
1977 | rcu_read_lock(); |
1978 | nlsk = rcu_dereference(net->xfrm.nlsk); |
1979 | if (nlsk) |
1980 | ret = netlink_has_listeners(sk: nlsk, XFRMNLGRP_AEVENTS); |
1981 | rcu_read_unlock(); |
1982 | return ret; |
1983 | } |
1984 | |
1985 | static inline int xfrm_acquire_is_on(struct net *net) |
1986 | { |
1987 | struct sock *nlsk; |
1988 | int ret = 0; |
1989 | |
1990 | rcu_read_lock(); |
1991 | nlsk = rcu_dereference(net->xfrm.nlsk); |
1992 | if (nlsk) |
1993 | ret = netlink_has_listeners(sk: nlsk, XFRMNLGRP_ACQUIRE); |
1994 | rcu_read_unlock(); |
1995 | |
1996 | return ret; |
1997 | } |
1998 | #endif |
1999 | |
2000 | static inline unsigned int aead_len(struct xfrm_algo_aead *alg) |
2001 | { |
2002 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); |
2003 | } |
2004 | |
2005 | static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg) |
2006 | { |
2007 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); |
2008 | } |
2009 | |
2010 | static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) |
2011 | { |
2012 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); |
2013 | } |
2014 | |
2015 | static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) |
2016 | { |
2017 | return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); |
2018 | } |
2019 | |
2020 | #ifdef CONFIG_XFRM_MIGRATE |
2021 | static inline int xfrm_replay_clone(struct xfrm_state *x, |
2022 | struct xfrm_state *orig) |
2023 | { |
2024 | |
2025 | x->replay_esn = kmemdup(orig->replay_esn, |
2026 | xfrm_replay_state_esn_len(orig->replay_esn), |
2027 | GFP_KERNEL); |
2028 | if (!x->replay_esn) |
2029 | return -ENOMEM; |
2030 | x->preplay_esn = kmemdup(orig->preplay_esn, |
2031 | xfrm_replay_state_esn_len(orig->preplay_esn), |
2032 | GFP_KERNEL); |
2033 | if (!x->preplay_esn) |
2034 | return -ENOMEM; |
2035 | |
2036 | return 0; |
2037 | } |
2038 | |
2039 | static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig) |
2040 | { |
2041 | return kmemdup(orig, aead_len(orig), GFP_KERNEL); |
2042 | } |
2043 | |
2044 | |
2045 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
2046 | { |
2047 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
2048 | } |
2049 | |
2050 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
2051 | { |
2052 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); |
2053 | } |
2054 | |
2055 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
2056 | { |
2057 | int i; |
2058 | for (i = 0; i < n; i++) |
2059 | xfrm_state_put(x: *(states + i)); |
2060 | } |
2061 | |
2062 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) |
2063 | { |
2064 | int i; |
2065 | for (i = 0; i < n; i++) |
2066 | xfrm_state_delete(x: *(states + i)); |
2067 | } |
2068 | #endif |
2069 | |
2070 | void __init xfrm_dev_init(void); |
2071 | |
2072 | #ifdef CONFIG_XFRM_OFFLOAD |
2073 | void xfrm_dev_resume(struct sk_buff *skb); |
2074 | void xfrm_dev_backlog(struct softnet_data *sd); |
2075 | struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again); |
2076 | int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, |
2077 | struct xfrm_user_offload *xuo, |
2078 | struct netlink_ext_ack *extack); |
2079 | int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp, |
2080 | struct xfrm_user_offload *xuo, u8 dir, |
2081 | struct netlink_ext_ack *extack); |
2082 | bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x); |
2083 | void xfrm_dev_state_delete(struct xfrm_state *x); |
2084 | void xfrm_dev_state_free(struct xfrm_state *x); |
2085 | |
2086 | static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x) |
2087 | { |
2088 | struct xfrm_dev_offload *xso = &x->xso; |
2089 | struct net_device *dev = READ_ONCE(xso->dev); |
2090 | |
2091 | if (dev && dev->xfrmdev_ops->xdo_dev_state_advance_esn) |
2092 | dev->xfrmdev_ops->xdo_dev_state_advance_esn(x); |
2093 | } |
2094 | |
2095 | static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) |
2096 | { |
2097 | struct xfrm_state *x = dst->xfrm; |
2098 | struct xfrm_dst *xdst; |
2099 | |
2100 | if (!x || !x->type_offload) |
2101 | return false; |
2102 | |
2103 | xdst = (struct xfrm_dst *) dst; |
2104 | if (!x->xso.offload_handle && !xdst->child->xfrm) |
2105 | return true; |
2106 | if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) && |
2107 | !xdst->child->xfrm) |
2108 | return true; |
2109 | |
2110 | return false; |
2111 | } |
2112 | |
2113 | static inline void xfrm_dev_policy_delete(struct xfrm_policy *x) |
2114 | { |
2115 | struct xfrm_dev_offload *xdo = &x->xdo; |
2116 | struct net_device *dev = xdo->dev; |
2117 | |
2118 | if (dev && dev->xfrmdev_ops && dev->xfrmdev_ops->xdo_dev_policy_delete) |
2119 | dev->xfrmdev_ops->xdo_dev_policy_delete(x); |
2120 | } |
2121 | |
2122 | static inline void xfrm_dev_policy_free(struct xfrm_policy *x) |
2123 | { |
2124 | struct xfrm_dev_offload *xdo = &x->xdo; |
2125 | struct net_device *dev = xdo->dev; |
2126 | |
2127 | if (dev && dev->xfrmdev_ops) { |
2128 | if (dev->xfrmdev_ops->xdo_dev_policy_free) |
2129 | dev->xfrmdev_ops->xdo_dev_policy_free(x); |
2130 | xdo->dev = NULL; |
2131 | netdev_put(dev, tracker: &xdo->dev_tracker); |
2132 | } |
2133 | } |
2134 | #else |
2135 | static inline void xfrm_dev_resume(struct sk_buff *skb) |
2136 | { |
2137 | } |
2138 | |
2139 | static inline void xfrm_dev_backlog(struct softnet_data *sd) |
2140 | { |
2141 | } |
2142 | |
2143 | static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again) |
2144 | { |
2145 | return skb; |
2146 | } |
2147 | |
2148 | static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo, struct netlink_ext_ack *extack) |
2149 | { |
2150 | return 0; |
2151 | } |
2152 | |
2153 | static inline void xfrm_dev_state_delete(struct xfrm_state *x) |
2154 | { |
2155 | } |
2156 | |
2157 | static inline void xfrm_dev_state_free(struct xfrm_state *x) |
2158 | { |
2159 | } |
2160 | |
2161 | static inline int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp, |
2162 | struct xfrm_user_offload *xuo, u8 dir, |
2163 | struct netlink_ext_ack *extack) |
2164 | { |
2165 | return 0; |
2166 | } |
2167 | |
2168 | static inline void xfrm_dev_policy_delete(struct xfrm_policy *x) |
2169 | { |
2170 | } |
2171 | |
2172 | static inline void xfrm_dev_policy_free(struct xfrm_policy *x) |
2173 | { |
2174 | } |
2175 | |
2176 | static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x) |
2177 | { |
2178 | return false; |
2179 | } |
2180 | |
2181 | static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x) |
2182 | { |
2183 | } |
2184 | |
2185 | static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) |
2186 | { |
2187 | return false; |
2188 | } |
2189 | #endif |
2190 | |
2191 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
2192 | { |
2193 | if (attrs[XFRMA_MARK]) |
2194 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
2195 | else |
2196 | m->v = m->m = 0; |
2197 | |
2198 | return m->v & m->m; |
2199 | } |
2200 | |
2201 | static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) |
2202 | { |
2203 | int ret = 0; |
2204 | |
2205 | if (m->m | m->v) |
2206 | ret = nla_put(skb, attrtype: XFRMA_MARK, attrlen: sizeof(struct xfrm_mark), data: m); |
2207 | return ret; |
2208 | } |
2209 | |
2210 | static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x) |
2211 | { |
2212 | struct xfrm_mark *m = &x->props.smark; |
2213 | |
2214 | return (m->v & m->m) | (mark & ~m->m); |
2215 | } |
2216 | |
2217 | static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id) |
2218 | { |
2219 | int ret = 0; |
2220 | |
2221 | if (if_id) |
2222 | ret = nla_put_u32(skb, attrtype: XFRMA_IF_ID, value: if_id); |
2223 | return ret; |
2224 | } |
2225 | |
2226 | static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, |
2227 | unsigned int family) |
2228 | { |
2229 | bool tunnel = false; |
2230 | |
2231 | switch(family) { |
2232 | case AF_INET: |
2233 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) |
2234 | tunnel = true; |
2235 | break; |
2236 | case AF_INET6: |
2237 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) |
2238 | tunnel = true; |
2239 | break; |
2240 | } |
2241 | if (tunnel && !(x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL)) |
2242 | return -EINVAL; |
2243 | |
2244 | return 0; |
2245 | } |
2246 | |
2247 | extern const int xfrm_msg_min[XFRM_NR_MSGTYPES]; |
2248 | extern const struct nla_policy xfrma_policy[XFRMA_MAX+1]; |
2249 | |
2250 | struct xfrm_translator { |
2251 | /* Allocate frag_list and put compat translation there */ |
2252 | int (*alloc_compat)(struct sk_buff *skb, const struct nlmsghdr *src); |
2253 | |
2254 | /* Allocate nlmsg with 64-bit translaton of received 32-bit message */ |
2255 | struct nlmsghdr *(*rcv_msg_compat)(const struct nlmsghdr *nlh, |
2256 | int maxtype, const struct nla_policy *policy, |
2257 | struct netlink_ext_ack *extack); |
2258 | |
2259 | /* Translate 32-bit user_policy from sockptr */ |
2260 | int (*xlate_user_policy_sockptr)(u8 **pdata32, int optlen); |
2261 | |
2262 | struct module *owner; |
2263 | }; |
2264 | |
2265 | #if IS_ENABLED(CONFIG_XFRM_USER_COMPAT) |
2266 | extern int xfrm_register_translator(struct xfrm_translator *xtr); |
2267 | extern int xfrm_unregister_translator(struct xfrm_translator *xtr); |
2268 | extern struct xfrm_translator *xfrm_get_translator(void); |
2269 | extern void xfrm_put_translator(struct xfrm_translator *xtr); |
2270 | #else |
2271 | static inline struct xfrm_translator *xfrm_get_translator(void) |
2272 | { |
2273 | return NULL; |
2274 | } |
2275 | static inline void xfrm_put_translator(struct xfrm_translator *xtr) |
2276 | { |
2277 | } |
2278 | #endif |
2279 | |
2280 | #if IS_ENABLED(CONFIG_IPV6) |
2281 | static inline bool xfrm6_local_dontfrag(const struct sock *sk) |
2282 | { |
2283 | int proto; |
2284 | |
2285 | if (!sk || sk->sk_family != AF_INET6) |
2286 | return false; |
2287 | |
2288 | proto = sk->sk_protocol; |
2289 | if (proto == IPPROTO_UDP || proto == IPPROTO_RAW) |
2290 | return inet6_test_bit(DONTFRAG, sk); |
2291 | |
2292 | return false; |
2293 | } |
2294 | #endif |
2295 | |
2296 | #if (IS_BUILTIN(CONFIG_XFRM_INTERFACE) && IS_ENABLED(CONFIG_DEBUG_INFO_BTF)) || \ |
2297 | (IS_MODULE(CONFIG_XFRM_INTERFACE) && IS_ENABLED(CONFIG_DEBUG_INFO_BTF_MODULES)) |
2298 | |
2299 | extern struct metadata_dst __percpu *xfrm_bpf_md_dst; |
2300 | |
2301 | int register_xfrm_interface_bpf(void); |
2302 | |
2303 | #else |
2304 | |
2305 | static inline int register_xfrm_interface_bpf(void) |
2306 | { |
2307 | return 0; |
2308 | } |
2309 | |
2310 | #endif |
2311 | |
2312 | #if IS_ENABLED(CONFIG_DEBUG_INFO_BTF) |
2313 | int register_xfrm_state_bpf(void); |
2314 | #else |
2315 | static inline int register_xfrm_state_bpf(void) |
2316 | { |
2317 | return 0; |
2318 | } |
2319 | #endif |
2320 | |
2321 | int xfrm_nat_keepalive_init(unsigned short family); |
2322 | void xfrm_nat_keepalive_fini(unsigned short family); |
2323 | int xfrm_nat_keepalive_net_init(struct net *net); |
2324 | int xfrm_nat_keepalive_net_fini(struct net *net); |
2325 | void xfrm_nat_keepalive_state_updated(struct xfrm_state *x); |
2326 | |
2327 | #endif /* _NET_XFRM_H */ |
2328 |
Definitions
- xfrm_state_walk
- xfrm_dev_offload
- xfrm_mode
- xfrm_replay_mode
- xfrm_state
- xs_net
- km_event
- xfrm_if_decode_session_result
- xfrm_if_cb
- xfrm_dst_lookup_params
- xfrm_policy_afinfo
- xfrm_state_afinfo
- xfrm_input_afinfo
- xfrm_type
- xfrm_type_offload
- xfrm_unset_type_offload
- xfrm_mode_cbs
- xfrm_af2proto
- xfrm_ip2inner_mode
- xfrm_tmpl
- xfrm_policy_walk_entry
- xfrm_policy_walk
- xfrm_policy_queue
- xfrm_policy
- xp_net
- xfrm_kmaddress
- xfrm_migrate
- xfrm_mgr
- xfrm_tunnel_skb_cb
- xfrm_skb_cb
- xfrm_mode_skb_cb
- xfrm_spi_skb_cb
- xfrm_audit_start
- xfrm_audit_helper_usrinfo
- xfrm_pol_hold
- xfrm_pol_put
- xfrm_pols_put
- __xfrm_state_put
- xfrm_state_put
- xfrm_state_put_sync
- xfrm_state_hold
- addr_match
- addr4_match
- xfrm_flowi_sport
- xfrm_flowi_dport
- xfrm_sec_ctx_match
- xfrm_dst
- xfrm_dst_path
- xfrm_dst_child
- xfrm_dst_set_child
- xfrm_dst_destroy
- xfrm_if_parms
- xfrm_if
- xfrm_offload
- sec_path
- secpath_reset
- xfrm_addr_any
- __xfrm4_state_addr_cmp
- __xfrm6_state_addr_cmp
- xfrm_state_addr_cmp
- xfrm_input_state
- xfrm_offload
- __xfrm_check_nopolicy
- __xfrm_check_dev_nopolicy
- __xfrm_policy_check2
- xfrm_policy_check
- xfrm4_policy_check
- xfrm6_policy_check
- xfrm4_policy_check_reverse
- xfrm6_policy_check_reverse
- xfrm_decode_session
- xfrm_decode_session_reverse
- xfrm_route_forward
- xfrm4_route_forward
- xfrm6_route_forward
- xfrm_sk_clone_policy
- xfrm_sk_free_policy
- xfrm_flowi_daddr
- xfrm_flowi_saddr
- xfrm_flowi_addr_get
- __xfrm4_state_addr_check
- __xfrm6_state_addr_check
- xfrm_state_addr_check
- xfrm_state_addr_flow_check
- xfrm_state_kern
- xfrm_id_proto_valid
- xfrm_id_proto_match
- xfrm_algo_aead_info
- xfrm_algo_auth_info
- xfrm_algo_encr_info
- xfrm_algo_comp_info
- xfrm_algo_desc
- xfrm4_protocol
- xfrm6_protocol
- xfrm_tunnel
- xfrm6_tunnel
- xfrm_dev_state_update_stats
- xfrmk_sadinfo
- xfrmk_spdinfo
- xfrm4_rcv_spi
- xfrm6_addr_equal
- xfrm_addr_equal
- xfrm_policy_id2dir
- xfrm_aevent_is_on
- xfrm_acquire_is_on
- aead_len
- xfrm_alg_len
- xfrm_alg_auth_len
- xfrm_replay_state_esn_len
- xfrm_replay_clone
- xfrm_algo_aead_clone
- xfrm_algo_clone
- xfrm_algo_auth_clone
- xfrm_states_put
- xfrm_states_delete
- xfrm_dev_state_advance_esn
- xfrm_dst_offload_ok
- xfrm_dev_policy_delete
- xfrm_dev_policy_free
- xfrm_mark_get
- xfrm_mark_put
- xfrm_smark_get
- xfrm_if_id_put
- xfrm_tunnel_check
- xfrm_translator
- xfrm6_local_dontfrag
- register_xfrm_interface_bpf
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