Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _NET_XFRM_H |
3 | #define _NET_XFRM_H | |
4 | ||
aabc9761 | 5 | #include <linux/compiler.h> |
1da177e4 LT |
6 | #include <linux/xfrm.h> |
7 | #include <linux/spinlock.h> | |
8 | #include <linux/list.h> | |
9 | #include <linux/skbuff.h> | |
14c85021 | 10 | #include <linux/socket.h> |
1da177e4 | 11 | #include <linux/pfkeyv2.h> |
5794708f | 12 | #include <linux/ipsec.h> |
1da177e4 | 13 | #include <linux/in6.h> |
4a3e2f71 | 14 | #include <linux/mutex.h> |
ab5f5e8b | 15 | #include <linux/audit.h> |
5a0e3ad6 | 16 | #include <linux/slab.h> |
88755e9c | 17 | #include <linux/refcount.h> |
c6d1b26a | 18 | #include <linux/sockptr.h> |
1da177e4 LT |
19 | |
20 | #include <net/sock.h> | |
21 | #include <net/dst.h> | |
436a0a40 | 22 | #include <net/ip.h> |
1da177e4 LT |
23 | #include <net/route.h> |
24 | #include <net/ipv6.h> | |
25 | #include <net/ip6_fib.h> | |
fe1a5f03 | 26 | #include <net/flow.h> |
f203b76d | 27 | #include <net/gro_cells.h> |
9e0d57fd YP |
28 | |
29 | #include <linux/interrupt.h> | |
30 | ||
558f82ef MN |
31 | #ifdef CONFIG_XFRM_STATISTICS |
32 | #include <net/snmp.h> | |
33 | #endif | |
1da177e4 | 34 | |
d3d6dd3a MN |
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 | ||
fa9921e4 | 43 | #define XFRM_ALIGN4(len) (((len) + 3) & ~3) |
1da177e4 | 44 | #define XFRM_ALIGN8(len) (((len) + 7) & ~7) |
b59f45d0 HX |
45 | #define MODULE_ALIAS_XFRM_MODE(family, encap) \ |
46 | MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) | |
d3d6dd3a MN |
47 | #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ |
48 | MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) | |
ffdb5211 IT |
49 | #define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \ |
50 | MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto)) | |
1da177e4 | 51 | |
558f82ef | 52 | #ifdef CONFIG_XFRM_STATISTICS |
59c9940e | 53 | #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) |
558f82ef | 54 | #else |
59c9940e | 55 | #define XFRM_INC_STATS(net, field) ((void)(net)) |
558f82ef MN |
56 | #endif |
57 | ||
1da177e4 LT |
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 | ||
12a169e7 HX |
120 | struct xfrm_state_walk { |
121 | struct list_head all; | |
122 | u8 state; | |
d3623099 ND |
123 | u8 dying; |
124 | u8 proto; | |
12a169e7 | 125 | u32 seq; |
870a2df4 | 126 | struct xfrm_address_filter *filter; |
12a169e7 HX |
127 | }; |
128 | ||
482db2f1 LR |
129 | enum { |
130 | XFRM_DEV_OFFLOAD_IN = 1, | |
131 | XFRM_DEV_OFFLOAD_OUT, | |
919e43fa | 132 | XFRM_DEV_OFFLOAD_FWD, |
482db2f1 LR |
133 | }; |
134 | ||
d14f28b8 LR |
135 | enum { |
136 | XFRM_DEV_OFFLOAD_UNSPECIFIED, | |
137 | XFRM_DEV_OFFLOAD_CRYPTO, | |
138 | XFRM_DEV_OFFLOAD_PACKET, | |
139 | }; | |
140 | ||
87e0a94e | 141 | struct xfrm_dev_offload { |
d77e38e6 | 142 | struct net_device *dev; |
e1b539bd | 143 | netdevice_tracker dev_tracker; |
bdfd2d1f | 144 | struct net_device *real_dev; |
d77e38e6 | 145 | unsigned long offload_handle; |
482db2f1 | 146 | u8 dir : 2; |
d14f28b8 | 147 | u8 type : 2; |
d77e38e6 SK |
148 | }; |
149 | ||
c9500d7b FW |
150 | struct xfrm_mode { |
151 | u8 encap; | |
152 | u8 family; | |
153 | u8 flags; | |
154 | }; | |
155 | ||
156 | /* Flags for xfrm_mode. */ | |
157 | enum { | |
158 | XFRM_MODE_FLAG_TUNNEL = 1, | |
159 | }; | |
160 | ||
cfc61c59 FW |
161 | enum xfrm_replay_mode { |
162 | XFRM_REPLAY_MODE_LEGACY, | |
163 | XFRM_REPLAY_MODE_BMP, | |
164 | XFRM_REPLAY_MODE_ESN, | |
165 | }; | |
166 | ||
1da177e4 | 167 | /* Full description of state of transformer. */ |
fd2c3ef7 | 168 | struct xfrm_state { |
0c5c9fb5 | 169 | possible_net_t xs_net; |
abb81c4f | 170 | union { |
12a169e7 | 171 | struct hlist_node gclist; |
abb81c4f HX |
172 | struct hlist_node bydst; |
173 | }; | |
8f126e37 DM |
174 | struct hlist_node bysrc; |
175 | struct hlist_node byspi; | |
fe9f1d87 | 176 | struct hlist_node byseq; |
1da177e4 | 177 | |
88755e9c | 178 | refcount_t refcnt; |
1da177e4 LT |
179 | spinlock_t lock; |
180 | ||
181 | struct xfrm_id id; | |
182 | struct xfrm_selector sel; | |
bf825f81 | 183 | struct xfrm_mark mark; |
7e652640 | 184 | u32 if_id; |
35d2856b | 185 | u32 tfcpad; |
1da177e4 | 186 | |
9d4a706d DM |
187 | u32 genid; |
188 | ||
12a169e7 HX |
189 | /* Key manager bits */ |
190 | struct xfrm_state_walk km; | |
1da177e4 LT |
191 | |
192 | /* Parameters of this state. */ | |
193 | struct { | |
194 | u32 reqid; | |
195 | u8 mode; | |
196 | u8 replay_window; | |
197 | u8 aalgo, ealgo, calgo; | |
198 | u8 flags; | |
199 | u16 family; | |
200 | xfrm_address_t saddr; | |
201 | int header_len; | |
202 | int trailer_len; | |
a947b0a9 | 203 | u32 extra_flags; |
9b42c1f1 | 204 | struct xfrm_mark smark; |
1da177e4 LT |
205 | } props; |
206 | ||
207 | struct xfrm_lifetime_cfg lft; | |
208 | ||
209 | /* Data for transformer */ | |
4447bb33 | 210 | struct xfrm_algo_auth *aalg; |
1da177e4 LT |
211 | struct xfrm_algo *ealg; |
212 | struct xfrm_algo *calg; | |
1a6509d9 | 213 | struct xfrm_algo_aead *aead; |
69b0137f | 214 | const char *geniv; |
1da177e4 | 215 | |
4e484b3e AA |
216 | /* mapping change rate limiting */ |
217 | __be16 new_mapping_sport; | |
218 | u32 new_mapping; /* seconds */ | |
219 | u32 mapping_maxage; /* seconds for input SA */ | |
220 | ||
1da177e4 LT |
221 | /* Data for encapsulator */ |
222 | struct xfrm_encap_tmpl *encap; | |
e27cca96 | 223 | struct sock __rcu *encap_sk; |
1da177e4 | 224 | |
060f02a3 NT |
225 | /* Data for care-of address */ |
226 | xfrm_address_t *coaddr; | |
227 | ||
1da177e4 LT |
228 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
229 | struct xfrm_state *tunnel; | |
230 | ||
231 | /* If a tunnel, number of users + 1 */ | |
232 | atomic_t tunnel_users; | |
233 | ||
234 | /* State for replay detection */ | |
235 | struct xfrm_replay_state replay; | |
9736acf3 | 236 | struct xfrm_replay_state_esn *replay_esn; |
1da177e4 | 237 | |
f8cd5488 JHS |
238 | /* Replay detection state at the time we sent the last notification */ |
239 | struct xfrm_replay_state preplay; | |
9736acf3 | 240 | struct xfrm_replay_state_esn *preplay_esn; |
f8cd5488 | 241 | |
cfc61c59 FW |
242 | /* replay detection mode */ |
243 | enum xfrm_replay_mode repl_mode; | |
2717096a JHS |
244 | /* internal flag that only holds state for delayed aevent at the |
245 | * moment | |
246 | */ | |
247 | u32 xflags; | |
248 | ||
f8cd5488 JHS |
249 | /* Replay detection notification settings */ |
250 | u32 replay_maxage; | |
251 | u32 replay_maxdiff; | |
252 | ||
253 | /* Replay detection notification timer */ | |
254 | struct timer_list rtimer; | |
255 | ||
1da177e4 LT |
256 | /* Statistics */ |
257 | struct xfrm_stats stats; | |
258 | ||
259 | struct xfrm_lifetime_cur curlft; | |
671422b2 | 260 | struct hrtimer mtimer; |
1da177e4 | 261 | |
87e0a94e | 262 | struct xfrm_dev_offload xso; |
d77e38e6 | 263 | |
e3c0d047 FD |
264 | /* used to fix curlft->add_time when changing date */ |
265 | long saved_tmo; | |
266 | ||
9afaca05 | 267 | /* Last used time */ |
03dc7a35 | 268 | time64_t lastused; |
9afaca05 | 269 | |
cac2661c SK |
270 | struct page_frag xfrag; |
271 | ||
1da177e4 LT |
272 | /* Reference to data common to all the instances of this |
273 | * transformer. */ | |
533cb5b0 | 274 | const struct xfrm_type *type; |
c9500d7b FW |
275 | struct xfrm_mode inner_mode; |
276 | struct xfrm_mode inner_mode_iaf; | |
277 | struct xfrm_mode outer_mode; | |
1da177e4 | 278 | |
9d389d7f SK |
279 | const struct xfrm_type_offload *type_offload; |
280 | ||
df71837d TJ |
281 | /* Security context */ |
282 | struct xfrm_sec_ctx *security; | |
283 | ||
1da177e4 LT |
284 | /* Private data of this transformer, format is opaque, |
285 | * interpreted by xfrm_type methods. */ | |
286 | void *data; | |
287 | }; | |
288 | ||
673c09be AD |
289 | static inline struct net *xs_net(struct xfrm_state *x) |
290 | { | |
291 | return read_pnet(&x->xs_net); | |
292 | } | |
293 | ||
2717096a JHS |
294 | /* xflags - make enum if more show up */ |
295 | #define XFRM_TIME_DEFER 1 | |
e3c0d047 | 296 | #define XFRM_SOFT_EXPIRE 2 |
2717096a | 297 | |
1da177e4 LT |
298 | enum { |
299 | XFRM_STATE_VOID, | |
300 | XFRM_STATE_ACQ, | |
301 | XFRM_STATE_VALID, | |
302 | XFRM_STATE_ERROR, | |
303 | XFRM_STATE_EXPIRED, | |
304 | XFRM_STATE_DEAD | |
305 | }; | |
306 | ||
26b15dad | 307 | /* callback structure passed from either netlink or pfkey */ |
fd2c3ef7 | 308 | struct km_event { |
bf08867f HX |
309 | union { |
310 | u32 hard; | |
311 | u32 proto; | |
312 | u32 byid; | |
f8cd5488 | 313 | u32 aevent; |
f7b6983f | 314 | u32 type; |
bf08867f HX |
315 | } data; |
316 | ||
26b15dad | 317 | u32 seq; |
15e47304 | 318 | u32 portid; |
26b15dad | 319 | u32 event; |
7067802e | 320 | struct net *net; |
26b15dad JHS |
321 | }; |
322 | ||
abc340b3 EB |
323 | struct xfrm_if_decode_session_result { |
324 | struct net *net; | |
325 | u32 if_id; | |
326 | }; | |
327 | ||
f203b76d | 328 | struct xfrm_if_cb { |
abc340b3 EB |
329 | bool (*decode_session)(struct sk_buff *skb, |
330 | unsigned short family, | |
331 | struct xfrm_if_decode_session_result *res); | |
f203b76d SK |
332 | }; |
333 | ||
334 | void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb); | |
335 | void xfrm_if_unregister_cb(void); | |
336 | ||
25ee3286 | 337 | struct net_device; |
1da177e4 LT |
338 | struct xfrm_type; |
339 | struct xfrm_dst; | |
340 | struct xfrm_policy_afinfo { | |
1da177e4 | 341 | struct dst_ops *dst_ops; |
42a7b32b DA |
342 | struct dst_entry *(*dst_lookup)(struct net *net, |
343 | int tos, int oif, | |
5e6b930f | 344 | const xfrm_address_t *saddr, |
077fbac4 LC |
345 | const xfrm_address_t *daddr, |
346 | u32 mark); | |
42a7b32b DA |
347 | int (*get_saddr)(struct net *net, int oif, |
348 | xfrm_address_t *saddr, | |
077fbac4 LC |
349 | xfrm_address_t *daddr, |
350 | u32 mark); | |
25ee3286 | 351 | int (*fill_dst)(struct xfrm_dst *xdst, |
87c1e12b | 352 | struct net_device *dev, |
0c7b3eef | 353 | const struct flowi *fl); |
2774c131 | 354 | struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); |
1da177e4 LT |
355 | }; |
356 | ||
a2817d8b FW |
357 | int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family); |
358 | void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo); | |
d511337a JP |
359 | void km_policy_notify(struct xfrm_policy *xp, int dir, |
360 | const struct km_event *c); | |
361 | void km_state_notify(struct xfrm_state *x, const struct km_event *c); | |
1da177e4 LT |
362 | |
363 | struct xfrm_tmpl; | |
d511337a JP |
364 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, |
365 | struct xfrm_policy *pol); | |
366 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); | |
367 | int __xfrm_state_delete(struct xfrm_state *x); | |
53bc6b4d | 368 | |
1da177e4 | 369 | struct xfrm_state_afinfo { |
4c203b04 FW |
370 | u8 family; |
371 | u8 proto; | |
4f518e80 FW |
372 | |
373 | const struct xfrm_type_offload *type_offload_esp; | |
374 | ||
375 | const struct xfrm_type *type_esp; | |
376 | const struct xfrm_type *type_ipip; | |
377 | const struct xfrm_type *type_ipip6; | |
378 | const struct xfrm_type *type_comp; | |
379 | const struct xfrm_type *type_ah; | |
380 | const struct xfrm_type *type_routing; | |
381 | const struct xfrm_type *type_dstopts; | |
9d389d7f | 382 | |
ede2059d | 383 | int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb); |
716062fd HX |
384 | int (*transport_finish)(struct sk_buff *skb, |
385 | int async); | |
628e341f | 386 | void (*local_error)(struct sk_buff *skb, u32 mtu); |
1da177e4 LT |
387 | }; |
388 | ||
d511337a JP |
389 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); |
390 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
391 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); | |
711059b9 | 392 | struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family); |
1da177e4 | 393 | |
2f32b51b | 394 | struct xfrm_input_afinfo { |
1475ee0a XL |
395 | u8 family; |
396 | bool is_ipip; | |
2f32b51b SK |
397 | int (*callback)(struct sk_buff *skb, u8 protocol, |
398 | int err); | |
399 | }; | |
400 | ||
960fdfde FW |
401 | int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo); |
402 | int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo); | |
2f32b51b | 403 | |
b48c05ab | 404 | void xfrm_flush_gc(void); |
d511337a | 405 | void xfrm_state_delete_tunnel(struct xfrm_state *x); |
1da177e4 | 406 | |
fd2c3ef7 | 407 | struct xfrm_type { |
1da177e4 | 408 | struct module *owner; |
a6337463 | 409 | u8 proto; |
410 | u8 flags; | |
1b5c2299 | 411 | #define XFRM_TYPE_NON_FRAGMENT 1 |
436a0a40 | 412 | #define XFRM_TYPE_REPLAY_PROT 2 |
f04e7e8d HX |
413 | #define XFRM_TYPE_LOCAL_COADDR 4 |
414 | #define XFRM_TYPE_REMOTE_COADDR 8 | |
1da177e4 | 415 | |
e1e10b44 SD |
416 | int (*init_state)(struct xfrm_state *x, |
417 | struct netlink_ext_ack *extack); | |
1da177e4 | 418 | void (*destructor)(struct xfrm_state *); |
e695633e | 419 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 420 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
8f029de2 DM |
421 | int (*reject)(struct xfrm_state *, struct sk_buff *, |
422 | const struct flowi *); | |
1da177e4 LT |
423 | }; |
424 | ||
d511337a | 425 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
4f518e80 | 426 | void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); |
1da177e4 | 427 | |
9d389d7f | 428 | struct xfrm_type_offload { |
9d389d7f SK |
429 | struct module *owner; |
430 | u8 proto; | |
431 | void (*encap)(struct xfrm_state *, struct sk_buff *pskb); | |
432 | int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb); | |
433 | int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features); | |
434 | }; | |
435 | ||
436 | int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family); | |
4f518e80 | 437 | void xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family); |
9d389d7f | 438 | |
df9dcb45 KM |
439 | static inline int xfrm_af2proto(unsigned int family) |
440 | { | |
441 | switch(family) { | |
442 | case AF_INET: | |
443 | return IPPROTO_IPIP; | |
444 | case AF_INET6: | |
445 | return IPPROTO_IPV6; | |
446 | default: | |
447 | return 0; | |
448 | } | |
449 | } | |
450 | ||
4c145dce | 451 | static inline const struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) |
df9dcb45 KM |
452 | { |
453 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || | |
454 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) | |
c9500d7b | 455 | return &x->inner_mode; |
df9dcb45 | 456 | else |
c9500d7b | 457 | return &x->inner_mode_iaf; |
df9dcb45 KM |
458 | } |
459 | ||
fd2c3ef7 | 460 | struct xfrm_tmpl { |
1da177e4 LT |
461 | /* id in template is interpreted as: |
462 | * daddr - destination of tunnel, may be zero for transport mode. | |
463 | * spi - zero to acquire spi. Not zero if spi is static, then | |
464 | * daddr must be fixed too. | |
465 | * proto - AH/ESP/IPCOMP | |
466 | */ | |
467 | struct xfrm_id id; | |
468 | ||
469 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
470 | xfrm_address_t saddr; | |
471 | ||
76b3f055 MK |
472 | unsigned short encap_family; |
473 | ||
a6337463 | 474 | u32 reqid; |
1da177e4 | 475 | |
7e49e6de | 476 | /* Mode: transport, tunnel etc. */ |
a6337463 | 477 | u8 mode; |
1da177e4 LT |
478 | |
479 | /* Sharing mode: unique, this session only, this user only etc. */ | |
a6337463 | 480 | u8 share; |
1da177e4 LT |
481 | |
482 | /* May skip this transfomration if no SA is found */ | |
a6337463 | 483 | u8 optional; |
1da177e4 | 484 | |
c5d18e98 | 485 | /* Skip aalgos/ealgos/calgos checks. */ |
a6337463 | 486 | u8 allalgs; |
c5d18e98 | 487 | |
1da177e4 | 488 | /* Bit mask of algos allowed for acquisition */ |
a6337463 | 489 | u32 aalgos; |
490 | u32 ealgos; | |
491 | u32 calgos; | |
1da177e4 LT |
492 | }; |
493 | ||
622dc828 | 494 | #define XFRM_MAX_DEPTH 6 |
54ef207a | 495 | #define XFRM_MAX_OFFLOAD_DEPTH 1 |
1da177e4 | 496 | |
12a169e7 HX |
497 | struct xfrm_policy_walk_entry { |
498 | struct list_head all; | |
499 | u8 dead; | |
500 | }; | |
501 | ||
502 | struct xfrm_policy_walk { | |
503 | struct xfrm_policy_walk_entry walk; | |
504 | u8 type; | |
505 | u32 seq; | |
506 | }; | |
507 | ||
a0073fe1 SK |
508 | struct xfrm_policy_queue { |
509 | struct sk_buff_head hold_queue; | |
510 | struct timer_list hold_timer; | |
511 | unsigned long timeout; | |
512 | }; | |
513 | ||
fd2c3ef7 | 514 | struct xfrm_policy { |
0c5c9fb5 | 515 | possible_net_t xp_net; |
2518c7c2 DM |
516 | struct hlist_node bydst; |
517 | struct hlist_node byidx; | |
1da177e4 LT |
518 | |
519 | /* This lock only affects elements except for entry. */ | |
520 | rwlock_t lock; | |
850a6212 | 521 | refcount_t refcnt; |
6be3b0db | 522 | u32 pos; |
1da177e4 LT |
523 | struct timer_list timer; |
524 | ||
80c802f3 | 525 | atomic_t genid; |
1da177e4 LT |
526 | u32 priority; |
527 | u32 index; | |
7e652640 | 528 | u32 if_id; |
bf825f81 | 529 | struct xfrm_mark mark; |
1da177e4 LT |
530 | struct xfrm_selector selector; |
531 | struct xfrm_lifetime_cfg lft; | |
532 | struct xfrm_lifetime_cur curlft; | |
12a169e7 | 533 | struct xfrm_policy_walk_entry walk; |
a0073fe1 | 534 | struct xfrm_policy_queue polq; |
9cf545eb | 535 | bool bydst_reinsert; |
46ca5f5d ACM |
536 | u8 type; |
537 | u8 action; | |
538 | u8 flags; | |
46ca5f5d | 539 | u8 xfrm_nr; |
12a169e7 | 540 | u16 family; |
df71837d | 541 | struct xfrm_sec_ctx *security; |
1da177e4 | 542 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
24969fac | 543 | struct hlist_node bydst_inexact_list; |
56f04730 | 544 | struct rcu_head rcu; |
919e43fa LR |
545 | |
546 | struct xfrm_dev_offload xdo; | |
1da177e4 LT |
547 | }; |
548 | ||
63eb23f5 | 549 | static inline struct net *xp_net(const struct xfrm_policy *xp) |
0331b1f3 AD |
550 | { |
551 | return read_pnet(&xp->xp_net); | |
552 | } | |
553 | ||
13c1d189 AE |
554 | struct xfrm_kmaddress { |
555 | xfrm_address_t local; | |
556 | xfrm_address_t remote; | |
557 | u32 reserved; | |
558 | u16 family; | |
559 | }; | |
560 | ||
80c9abaa SS |
561 | struct xfrm_migrate { |
562 | xfrm_address_t old_daddr; | |
563 | xfrm_address_t old_saddr; | |
564 | xfrm_address_t new_daddr; | |
565 | xfrm_address_t new_saddr; | |
566 | u8 proto; | |
567 | u8 mode; | |
568 | u16 reserved; | |
569 | u32 reqid; | |
570 | u16 old_family; | |
571 | u16 new_family; | |
572 | }; | |
573 | ||
f8cd5488 | 574 | #define XFRM_KM_TIMEOUT 30 |
f8cd5488 JHS |
575 | /* what happened */ |
576 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
577 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
578 | ||
579 | /* default aevent timeout in units of 100ms */ | |
580 | #define XFRM_AE_ETIME 10 | |
581 | /* Async Event timer multiplier */ | |
582 | #define XFRM_AE_ETH_M 10 | |
583 | /* default seq threshold size */ | |
584 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 | 585 | |
fd2c3ef7 | 586 | struct xfrm_mgr { |
1da177e4 | 587 | struct list_head list; |
214e005b | 588 | int (*notify)(struct xfrm_state *x, const struct km_event *c); |
65e0736b | 589 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); |
cb969f07 | 590 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 591 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
214e005b | 592 | int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); |
db983c11 | 593 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
183cad12 DM |
594 | int (*migrate)(const struct xfrm_selector *sel, |
595 | u8 dir, u8 type, | |
596 | const struct xfrm_migrate *m, | |
597 | int num_bundles, | |
8bafd730 AA |
598 | const struct xfrm_kmaddress *k, |
599 | const struct xfrm_encap_tmpl *encap); | |
0f24558e | 600 | bool (*is_alive)(const struct km_event *c); |
1da177e4 LT |
601 | }; |
602 | ||
f41b284a ZS |
603 | void xfrm_register_km(struct xfrm_mgr *km); |
604 | void xfrm_unregister_km(struct xfrm_mgr *km); | |
1da177e4 | 605 | |
70be6c91 SK |
606 | struct xfrm_tunnel_skb_cb { |
607 | union { | |
608 | struct inet_skb_parm h4; | |
609 | struct inet6_skb_parm h6; | |
610 | } header; | |
611 | ||
612 | union { | |
613 | struct ip_tunnel *ip4; | |
614 | struct ip6_tnl *ip6; | |
615 | } tunnel; | |
616 | }; | |
617 | ||
618 | #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) | |
619 | ||
436a0a40 HX |
620 | /* |
621 | * This structure is used for the duration where packets are being | |
622 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
623 | * area beyond the generic IP part may be overwritten. | |
624 | */ | |
625 | struct xfrm_skb_cb { | |
70be6c91 | 626 | struct xfrm_tunnel_skb_cb header; |
436a0a40 HX |
627 | |
628 | /* Sequence number for replay protection. */ | |
b318e0e4 | 629 | union { |
1ce3644a SK |
630 | struct { |
631 | __u32 low; | |
632 | __u32 hi; | |
633 | } output; | |
634 | struct { | |
635 | __be32 low; | |
636 | __be32 hi; | |
637 | } input; | |
b318e0e4 | 638 | } seq; |
436a0a40 HX |
639 | }; |
640 | ||
641 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
642 | ||
36cf9acf HX |
643 | /* |
644 | * This structure is used by the afinfo prepare_input/prepare_output functions | |
645 | * to transmit header information to the mode input/output functions. | |
646 | */ | |
647 | struct xfrm_mode_skb_cb { | |
70be6c91 | 648 | struct xfrm_tunnel_skb_cb header; |
36cf9acf HX |
649 | |
650 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
651 | __be16 id; | |
652 | __be16 frag_off; | |
653 | ||
732c8bd5 HX |
654 | /* IP header length (excluding options or extension headers). */ |
655 | u8 ihl; | |
656 | ||
36cf9acf HX |
657 | /* TOS for IPv4, class for IPv6. */ |
658 | u8 tos; | |
659 | ||
660 | /* TTL for IPv4, hop limitfor IPv6. */ | |
661 | u8 ttl; | |
662 | ||
663 | /* Protocol for IPv4, NH for IPv6. */ | |
664 | u8 protocol; | |
665 | ||
732c8bd5 HX |
666 | /* Option length for IPv4, zero for IPv6. */ |
667 | u8 optlen; | |
668 | ||
36cf9acf HX |
669 | /* Used by IPv6 only, zero for IPv4. */ |
670 | u8 flow_lbl[3]; | |
671 | }; | |
672 | ||
673 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
674 | ||
716062fd HX |
675 | /* |
676 | * This structure is used by the input processing to locate the SPI and | |
677 | * related information. | |
678 | */ | |
679 | struct xfrm_spi_skb_cb { | |
70be6c91 | 680 | struct xfrm_tunnel_skb_cb header; |
716062fd | 681 | |
716062fd | 682 | unsigned int daddroff; |
2fcb45b6 | 683 | unsigned int family; |
7785bba2 | 684 | __be32 seq; |
716062fd HX |
685 | }; |
686 | ||
687 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) | |
688 | ||
c9204d9c | 689 | #ifdef CONFIG_AUDITSYSCALL |
afeb14b4 | 690 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
ab5f5e8b JL |
691 | { |
692 | struct audit_buffer *audit_buf = NULL; | |
ab5f5e8b | 693 | |
f7859590 | 694 | if (audit_enabled == AUDIT_OFF) |
afeb14b4 | 695 | return NULL; |
cdfb6b34 | 696 | audit_buf = audit_log_start(audit_context(), GFP_ATOMIC, |
afeb14b4 | 697 | AUDIT_MAC_IPSEC_EVENT); |
ab5f5e8b JL |
698 | if (audit_buf == NULL) |
699 | return NULL; | |
afeb14b4 PM |
700 | audit_log_format(audit_buf, "op=%s", op); |
701 | return audit_buf; | |
702 | } | |
ab5f5e8b | 703 | |
2e71029e | 704 | static inline void xfrm_audit_helper_usrinfo(bool task_valid, |
afeb14b4 PM |
705 | struct audit_buffer *audit_buf) |
706 | { | |
2e71029e TH |
707 | const unsigned int auid = from_kuid(&init_user_ns, task_valid ? |
708 | audit_get_loginuid(current) : | |
709 | INVALID_UID); | |
710 | const unsigned int ses = task_valid ? audit_get_sessionid(current) : | |
f0b75216 | 711 | AUDIT_SID_UNSET; |
2e71029e TH |
712 | |
713 | audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); | |
f1370cc4 | 714 | audit_log_task_context(audit_buf); |
ab5f5e8b JL |
715 | } |
716 | ||
2e71029e TH |
717 | void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid); |
718 | void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
719 | bool task_valid); | |
720 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid); | |
721 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid); | |
d511337a JP |
722 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
723 | struct sk_buff *skb); | |
724 | void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, | |
725 | __be32 net_seq); | |
726 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); | |
727 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, | |
728 | __be32 net_seq); | |
729 | void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, | |
730 | u8 proto); | |
c9204d9c | 731 | #else |
41fef0ee MS |
732 | |
733 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
2e71029e | 734 | bool task_valid) |
41fef0ee MS |
735 | { |
736 | } | |
737 | ||
738 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
2e71029e | 739 | bool task_valid) |
41fef0ee MS |
740 | { |
741 | } | |
742 | ||
743 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
2e71029e | 744 | bool task_valid) |
41fef0ee MS |
745 | { |
746 | } | |
747 | ||
748 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
2e71029e | 749 | bool task_valid) |
41fef0ee MS |
750 | { |
751 | } | |
752 | ||
753 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
754 | struct sk_buff *skb) | |
755 | { | |
756 | } | |
757 | ||
9fdc4883 SK |
758 | static inline void xfrm_audit_state_replay(struct xfrm_state *x, |
759 | struct sk_buff *skb, __be32 net_seq) | |
760 | { | |
761 | } | |
762 | ||
41fef0ee MS |
763 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, |
764 | u16 family) | |
765 | { | |
766 | } | |
767 | ||
768 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
769 | __be32 net_spi, __be32 net_seq) | |
770 | { | |
771 | } | |
772 | ||
773 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
774 | struct sk_buff *skb, u8 proto) | |
775 | { | |
776 | } | |
c9204d9c | 777 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 778 | |
1da177e4 LT |
779 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
780 | { | |
781 | if (likely(policy != NULL)) | |
850a6212 | 782 | refcount_inc(&policy->refcnt); |
1da177e4 LT |
783 | } |
784 | ||
d511337a | 785 | void xfrm_policy_destroy(struct xfrm_policy *policy); |
1da177e4 LT |
786 | |
787 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
788 | { | |
850a6212 | 789 | if (refcount_dec_and_test(&policy->refcnt)) |
64c31b3f | 790 | xfrm_policy_destroy(policy); |
1da177e4 LT |
791 | } |
792 | ||
4e81bb83 MN |
793 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
794 | { | |
795 | int i; | |
796 | for (i = npols - 1; i >= 0; --i) | |
797 | xfrm_pol_put(pols[i]); | |
798 | } | |
4e81bb83 | 799 | |
f75a2804 | 800 | void __xfrm_state_destroy(struct xfrm_state *, bool); |
1da177e4 | 801 | |
21380b81 HX |
802 | static inline void __xfrm_state_put(struct xfrm_state *x) |
803 | { | |
88755e9c | 804 | refcount_dec(&x->refcnt); |
21380b81 HX |
805 | } |
806 | ||
1da177e4 LT |
807 | static inline void xfrm_state_put(struct xfrm_state *x) |
808 | { | |
88755e9c | 809 | if (refcount_dec_and_test(&x->refcnt)) |
f75a2804 CW |
810 | __xfrm_state_destroy(x, false); |
811 | } | |
812 | ||
813 | static inline void xfrm_state_put_sync(struct xfrm_state *x) | |
814 | { | |
815 | if (refcount_dec_and_test(&x->refcnt)) | |
816 | __xfrm_state_destroy(x, true); | |
1da177e4 LT |
817 | } |
818 | ||
819 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
820 | { | |
88755e9c | 821 | refcount_inc(&x->refcnt); |
1da177e4 LT |
822 | } |
823 | ||
1744a8fe | 824 | static inline bool addr_match(const void *token1, const void *token2, |
e1b0048e | 825 | unsigned int prefixlen) |
1da177e4 | 826 | { |
1744a8fe DM |
827 | const __be32 *a1 = token1; |
828 | const __be32 *a2 = token2; | |
e1b0048e AD |
829 | unsigned int pdw; |
830 | unsigned int pbi; | |
1da177e4 | 831 | |
a6337463 | 832 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
1da177e4 LT |
833 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
834 | ||
835 | if (pdw) | |
836 | if (memcmp(a1, a2, pdw << 2)) | |
1744a8fe | 837 | return false; |
1da177e4 LT |
838 | |
839 | if (pbi) { | |
5f19343f | 840 | __be32 mask; |
1da177e4 LT |
841 | |
842 | mask = htonl((0xffffffff) << (32 - pbi)); | |
843 | ||
844 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
1744a8fe | 845 | return false; |
1da177e4 LT |
846 | } |
847 | ||
1744a8fe | 848 | return true; |
1da177e4 LT |
849 | } |
850 | ||
26bff940 AD |
851 | static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) |
852 | { | |
853 | /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ | |
6c786bcb | 854 | if (sizeof(long) == 4 && prefixlen == 0) |
26bff940 | 855 | return true; |
6c786bcb | 856 | return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen))); |
26bff940 AD |
857 | } |
858 | ||
1da177e4 | 859 | static __inline__ |
6281dcc9 | 860 | __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 861 | { |
f9d07e41 | 862 | __be16 port; |
1d28f42c | 863 | switch(fl->flowi_proto) { |
1da177e4 LT |
864 | case IPPROTO_TCP: |
865 | case IPPROTO_UDP: | |
ba4e58ec | 866 | case IPPROTO_UDPLITE: |
1da177e4 | 867 | case IPPROTO_SCTP: |
6281dcc9 | 868 | port = uli->ports.sport; |
1da177e4 LT |
869 | break; |
870 | case IPPROTO_ICMP: | |
871 | case IPPROTO_ICMPV6: | |
6281dcc9 | 872 | port = htons(uli->icmpt.type); |
1da177e4 | 873 | break; |
2ce4272a | 874 | case IPPROTO_MH: |
6281dcc9 | 875 | port = htons(uli->mht.type); |
2ce4272a | 876 | break; |
cc9ff19d | 877 | case IPPROTO_GRE: |
6281dcc9 | 878 | port = htons(ntohl(uli->gre_key) >> 16); |
cc9ff19d | 879 | break; |
1da177e4 LT |
880 | default: |
881 | port = 0; /*XXX*/ | |
882 | } | |
883 | return port; | |
884 | } | |
885 | ||
886 | static __inline__ | |
6281dcc9 | 887 | __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 888 | { |
f9d07e41 | 889 | __be16 port; |
1d28f42c | 890 | switch(fl->flowi_proto) { |
1da177e4 LT |
891 | case IPPROTO_TCP: |
892 | case IPPROTO_UDP: | |
ba4e58ec | 893 | case IPPROTO_UDPLITE: |
1da177e4 | 894 | case IPPROTO_SCTP: |
6281dcc9 | 895 | port = uli->ports.dport; |
1da177e4 LT |
896 | break; |
897 | case IPPROTO_ICMP: | |
898 | case IPPROTO_ICMPV6: | |
6281dcc9 | 899 | port = htons(uli->icmpt.code); |
1da177e4 | 900 | break; |
cc9ff19d | 901 | case IPPROTO_GRE: |
6281dcc9 | 902 | port = htons(ntohl(uli->gre_key) & 0xffff); |
cc9ff19d | 903 | break; |
1da177e4 LT |
904 | default: |
905 | port = 0; /*XXX*/ | |
906 | } | |
907 | return port; | |
908 | } | |
909 | ||
d511337a JP |
910 | bool xfrm_selector_match(const struct xfrm_selector *sel, |
911 | const struct flowi *fl, unsigned short family); | |
1da177e4 | 912 | |
df71837d TJ |
913 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
914 | /* If neither has a context --> match | |
915 | * Otherwise, both must have a context and the sids, doi, alg must match | |
916 | */ | |
bc9b35ad | 917 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d TJ |
918 | { |
919 | return ((!s1 && !s2) || | |
920 | (s1 && s2 && | |
921 | (s1->ctx_sid == s2->ctx_sid) && | |
922 | (s1->ctx_doi == s2->ctx_doi) && | |
923 | (s1->ctx_alg == s2->ctx_alg))); | |
924 | } | |
925 | #else | |
bc9b35ad | 926 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d | 927 | { |
bc9b35ad | 928 | return true; |
df71837d TJ |
929 | } |
930 | #endif | |
931 | ||
1da177e4 LT |
932 | /* A struct encoding bundle of transformations to apply to some set of flow. |
933 | * | |
b6ca8bd5 | 934 | * xdst->child points to the next element of bundle. |
1da177e4 LT |
935 | * dst->xfrm points to an instanse of transformer. |
936 | * | |
937 | * Due to unfortunate limitations of current routing cache, which we | |
938 | * have no time to fix, it mirrors struct rtable and bound to the same | |
939 | * routing key, including saddr,daddr. However, we can have many of | |
940 | * bundles differing by session id. All the bundles grow from a parent | |
941 | * policy rule. | |
942 | */ | |
fd2c3ef7 | 943 | struct xfrm_dst { |
1da177e4 | 944 | union { |
1da177e4 LT |
945 | struct dst_entry dst; |
946 | struct rtable rt; | |
947 | struct rt6_info rt6; | |
948 | } u; | |
949 | struct dst_entry *route; | |
b6ca8bd5 | 950 | struct dst_entry *child; |
0f6c480f | 951 | struct dst_entry *path; |
80c802f3 TT |
952 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; |
953 | int num_pols, num_xfrms; | |
80c802f3 TT |
954 | u32 xfrm_genid; |
955 | u32 policy_genid; | |
1da177e4 LT |
956 | u32 route_mtu_cached; |
957 | u32 child_mtu_cached; | |
92d63dec HY |
958 | u32 route_cookie; |
959 | u32 path_cookie; | |
1da177e4 LT |
960 | }; |
961 | ||
0f6c480f DM |
962 | static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst) |
963 | { | |
964 | #ifdef CONFIG_XFRM | |
101dde42 | 965 | if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) { |
0f6c480f DM |
966 | const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst; |
967 | ||
968 | return xdst->path; | |
969 | } | |
970 | #endif | |
971 | return (struct dst_entry *) dst; | |
972 | } | |
973 | ||
b92cf4aa DM |
974 | static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst) |
975 | { | |
976 | #ifdef CONFIG_XFRM | |
101dde42 | 977 | if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) { |
b6ca8bd5 DM |
978 | struct xfrm_dst *xdst = (struct xfrm_dst *) dst; |
979 | return xdst->child; | |
980 | } | |
b92cf4aa DM |
981 | #endif |
982 | return NULL; | |
983 | } | |
984 | ||
def8b4fa | 985 | #ifdef CONFIG_XFRM |
45b018be DM |
986 | static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child) |
987 | { | |
b6ca8bd5 | 988 | xdst->child = child; |
45b018be DM |
989 | } |
990 | ||
aabc9761 HX |
991 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
992 | { | |
80c802f3 | 993 | xfrm_pols_put(xdst->pols, xdst->num_pols); |
aabc9761 HX |
994 | dst_release(xdst->route); |
995 | if (likely(xdst->u.dst.xfrm)) | |
996 | xfrm_state_put(xdst->u.dst.xfrm); | |
997 | } | |
def8b4fa | 998 | #endif |
aabc9761 | 999 | |
d511337a | 1000 | void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); |
aabc9761 | 1001 | |
f203b76d | 1002 | struct xfrm_if_parms { |
f203b76d SK |
1003 | int link; /* ifindex of underlying L2 interface */ |
1004 | u32 if_id; /* interface identifyer */ | |
abc340b3 | 1005 | bool collect_md; |
f203b76d SK |
1006 | }; |
1007 | ||
1008 | struct xfrm_if { | |
1009 | struct xfrm_if __rcu *next; /* next interface in list */ | |
1010 | struct net_device *dev; /* virtual device associated with interface */ | |
f203b76d SK |
1011 | struct net *net; /* netns for packet i/o */ |
1012 | struct xfrm_if_parms p; /* interface parms */ | |
1013 | ||
1014 | struct gro_cells gro_cells; | |
1015 | }; | |
1016 | ||
54ef207a SK |
1017 | struct xfrm_offload { |
1018 | /* Output sequence number for replay protection on offloading. */ | |
1019 | struct { | |
1020 | __u32 low; | |
1021 | __u32 hi; | |
1022 | } seq; | |
1023 | ||
1024 | __u32 flags; | |
1025 | #define SA_DELETE_REQ 1 | |
1026 | #define CRYPTO_DONE 2 | |
1027 | #define CRYPTO_NEXT_DONE 4 | |
1028 | #define CRYPTO_FALLBACK 8 | |
1029 | #define XFRM_GSO_SEGMENT 16 | |
1030 | #define XFRM_GRO 32 | |
b01a277a | 1031 | /* 64 is free */ |
f53c7239 | 1032 | #define XFRM_DEV_RESUME 128 |
94579ac3 | 1033 | #define XFRM_XMIT 256 |
54ef207a SK |
1034 | |
1035 | __u32 status; | |
1036 | #define CRYPTO_SUCCESS 1 | |
1037 | #define CRYPTO_GENERIC_ERROR 2 | |
1038 | #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4 | |
1039 | #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8 | |
1040 | #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16 | |
1041 | #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32 | |
1042 | #define CRYPTO_INVALID_PACKET_SYNTAX 64 | |
1043 | #define CRYPTO_INVALID_PROTOCOL 128 | |
1044 | ||
1045 | __u8 proto; | |
fa453523 | 1046 | __u8 inner_ipproto; |
54ef207a SK |
1047 | }; |
1048 | ||
fd2c3ef7 | 1049 | struct sec_path { |
1da177e4 | 1050 | int len; |
54ef207a SK |
1051 | int olen; |
1052 | ||
dbe5b4aa | 1053 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
54ef207a | 1054 | struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH]; |
1da177e4 LT |
1055 | }; |
1056 | ||
0ca64da1 | 1057 | struct sec_path *secpath_set(struct sk_buff *skb); |
1da177e4 LT |
1058 | |
1059 | static inline void | |
1060 | secpath_reset(struct sk_buff *skb) | |
1061 | { | |
1062 | #ifdef CONFIG_XFRM | |
4165079b | 1063 | skb_ext_del(skb, SKB_EXT_SEC_PATH); |
1da177e4 LT |
1064 | #endif |
1065 | } | |
1066 | ||
a1e59abf | 1067 | static inline int |
6cc32961 | 1068 | xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) |
a1e59abf PM |
1069 | { |
1070 | switch (family) { | |
1071 | case AF_INET: | |
1072 | return addr->a4 == 0; | |
1073 | case AF_INET6: | |
15e318bd | 1074 | return ipv6_addr_any(&addr->in6); |
a1e59abf PM |
1075 | } |
1076 | return 0; | |
1077 | } | |
1078 | ||
1da177e4 | 1079 | static inline int |
21eddb5c | 1080 | __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1081 | { |
1082 | return (tmpl->saddr.a4 && | |
1083 | tmpl->saddr.a4 != x->props.saddr.a4); | |
1084 | } | |
1085 | ||
1086 | static inline int | |
21eddb5c | 1087 | __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1088 | { |
1089 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
ff88b30c | 1090 | !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); |
1da177e4 LT |
1091 | } |
1092 | ||
1093 | static inline int | |
21eddb5c | 1094 | xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) |
1da177e4 LT |
1095 | { |
1096 | switch (family) { | |
1097 | case AF_INET: | |
1098 | return __xfrm4_state_addr_cmp(tmpl, x); | |
1099 | case AF_INET6: | |
1100 | return __xfrm6_state_addr_cmp(tmpl, x); | |
1101 | } | |
1102 | return !0; | |
1103 | } | |
1104 | ||
5958372d LR |
1105 | #ifdef CONFIG_XFRM |
1106 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) | |
1107 | { | |
1108 | struct sec_path *sp = skb_sec_path(skb); | |
1109 | ||
1110 | return sp->xvec[sp->len - 1]; | |
1111 | } | |
1112 | #endif | |
1113 | ||
1114 | static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb) | |
1115 | { | |
1116 | #ifdef CONFIG_XFRM | |
1117 | struct sec_path *sp = skb_sec_path(skb); | |
1118 | ||
1119 | if (!sp || !sp->olen || sp->len != sp->olen) | |
1120 | return NULL; | |
1121 | ||
1122 | return &sp->ovec[sp->olen - 1]; | |
1123 | #else | |
1124 | return NULL; | |
1125 | #endif | |
1126 | } | |
1127 | ||
1da177e4 | 1128 | #ifdef CONFIG_XFRM |
b58b1f56 ND |
1129 | int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, |
1130 | unsigned short family); | |
1131 | ||
1132 | static inline bool __xfrm_check_nopolicy(struct net *net, struct sk_buff *skb, | |
1133 | int dir) | |
2d151d39 | 1134 | { |
b58b1f56 ND |
1135 | if (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) |
1136 | return net->xfrm.policy_default[dir] == XFRM_USERPOLICY_ACCEPT; | |
1137 | ||
2d151d39 SK |
1138 | return false; |
1139 | } | |
1140 | ||
e6175a2e EB |
1141 | static inline bool __xfrm_check_dev_nopolicy(struct sk_buff *skb, |
1142 | int dir, unsigned short family) | |
1143 | { | |
1144 | if (dir != XFRM_POLICY_OUT && family == AF_INET) { | |
1145 | /* same dst may be used for traffic originating from | |
1146 | * devices with different policy settings. | |
1147 | */ | |
1148 | return IPCB(skb)->flags & IPSKB_NOPOLICY; | |
1149 | } | |
1150 | return skb_dst(skb) && (skb_dst(skb)->flags & DST_NOPOLICY); | |
1151 | } | |
1152 | ||
d5422efe HX |
1153 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
1154 | struct sk_buff *skb, | |
1155 | unsigned int family, int reverse) | |
1da177e4 | 1156 | { |
f6e1e25d | 1157 | struct net *net = dev_net(skb->dev); |
d5422efe | 1158 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
5958372d LR |
1159 | struct xfrm_offload *xo = xfrm_offload(skb); |
1160 | struct xfrm_state *x; | |
d5422efe | 1161 | |
1da177e4 | 1162 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
d5422efe | 1163 | return __xfrm_policy_check(sk, ndir, skb, family); |
4e81bb83 | 1164 | |
5958372d LR |
1165 | if (xo) { |
1166 | x = xfrm_input_state(skb); | |
1167 | if (x->xso.type == XFRM_DEV_OFFLOAD_PACKET) | |
1168 | return (xo->flags & CRYPTO_DONE) && | |
1169 | (xo->status & CRYPTO_SUCCESS); | |
1170 | } | |
1171 | ||
b58b1f56 | 1172 | return __xfrm_check_nopolicy(net, skb, dir) || |
e6175a2e | 1173 | __xfrm_check_dev_nopolicy(skb, dir, family) || |
b58b1f56 | 1174 | __xfrm_policy_check(sk, ndir, skb, family); |
d5422efe HX |
1175 | } |
1176 | ||
1177 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1178 | { | |
1179 | return __xfrm_policy_check2(sk, dir, skb, family, 0); | |
1da177e4 LT |
1180 | } |
1181 | ||
1182 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1183 | { | |
1184 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
1185 | } | |
1186 | ||
1187 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1188 | { | |
1189 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
1190 | } | |
1191 | ||
d5422efe HX |
1192 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1193 | struct sk_buff *skb) | |
1194 | { | |
1195 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); | |
1196 | } | |
1197 | ||
1198 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1199 | struct sk_buff *skb) | |
1200 | { | |
1201 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); | |
1202 | } | |
1203 | ||
d511337a JP |
1204 | int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, |
1205 | unsigned int family, int reverse); | |
d5422efe HX |
1206 | |
1207 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1208 | unsigned int family) | |
1209 | { | |
1210 | return __xfrm_decode_session(skb, fl, family, 0); | |
1211 | } | |
1212 | ||
1213 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, | |
1214 | struct flowi *fl, | |
1215 | unsigned int family) | |
1216 | { | |
1217 | return __xfrm_decode_session(skb, fl, family, 1); | |
1218 | } | |
1219 | ||
d511337a | 1220 | int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
1da177e4 LT |
1221 | |
1222 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
1223 | { | |
99a66657 AD |
1224 | struct net *net = dev_net(skb->dev); |
1225 | ||
b58b1f56 ND |
1226 | if (!net->xfrm.policy_count[XFRM_POLICY_OUT] && |
1227 | net->xfrm.policy_default[XFRM_POLICY_OUT] == XFRM_USERPOLICY_ACCEPT) | |
1228 | return true; | |
1229 | ||
1230 | return (skb_dst(skb)->flags & DST_NOXFRM) || | |
1231 | __xfrm_route_forward(skb, family); | |
1da177e4 LT |
1232 | } |
1233 | ||
1234 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
1235 | { | |
1236 | return xfrm_route_forward(skb, AF_INET); | |
1237 | } | |
1238 | ||
1239 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
1240 | { | |
1241 | return xfrm_route_forward(skb, AF_INET6); | |
1242 | } | |
1243 | ||
d188ba86 | 1244 | int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk); |
1da177e4 | 1245 | |
d188ba86 | 1246 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) |
1da177e4 | 1247 | { |
e22aa148 | 1248 | if (!sk_fullsock(osk)) |
1249 | return 0; | |
d188ba86 ED |
1250 | sk->sk_policy[0] = NULL; |
1251 | sk->sk_policy[1] = NULL; | |
1252 | if (unlikely(osk->sk_policy[0] || osk->sk_policy[1])) | |
1253 | return __xfrm_sk_clone_policy(sk, osk); | |
1da177e4 LT |
1254 | return 0; |
1255 | } | |
1256 | ||
d511337a | 1257 | int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
1258 | |
1259 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
1260 | { | |
d188ba86 ED |
1261 | struct xfrm_policy *pol; |
1262 | ||
1263 | pol = rcu_dereference_protected(sk->sk_policy[0], 1); | |
1264 | if (unlikely(pol != NULL)) { | |
1265 | xfrm_policy_delete(pol, XFRM_POLICY_MAX); | |
1da177e4 LT |
1266 | sk->sk_policy[0] = NULL; |
1267 | } | |
d188ba86 ED |
1268 | pol = rcu_dereference_protected(sk->sk_policy[1], 1); |
1269 | if (unlikely(pol != NULL)) { | |
1270 | xfrm_policy_delete(pol, XFRM_POLICY_MAX+1); | |
1da177e4 LT |
1271 | sk->sk_policy[1] = NULL; |
1272 | } | |
1273 | } | |
1274 | ||
1275 | #else | |
1276 | ||
1277 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
d188ba86 | 1278 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; } |
82695b30 SH |
1279 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } |
1280 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
1da177e4 | 1281 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
82695b30 SH |
1282 | { |
1283 | return 1; | |
1284 | } | |
1da177e4 LT |
1285 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
1286 | { | |
1287 | return 1; | |
1288 | } | |
1289 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1290 | { | |
1291 | return 1; | |
1292 | } | |
d5422efe HX |
1293 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
1294 | struct flowi *fl, | |
1295 | unsigned int family) | |
1296 | { | |
1297 | return -ENOSYS; | |
1298 | } | |
1299 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, | |
1300 | struct sk_buff *skb) | |
1301 | { | |
1302 | return 1; | |
1303 | } | |
1304 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1305 | struct sk_buff *skb) | |
1306 | { | |
1307 | return 1; | |
1308 | } | |
1da177e4 LT |
1309 | #endif |
1310 | ||
1311 | static __inline__ | |
e8a4e377 | 1312 | xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1313 | { |
1314 | switch (family){ | |
1315 | case AF_INET: | |
7e1dc7b6 | 1316 | return (xfrm_address_t *)&fl->u.ip4.daddr; |
1da177e4 | 1317 | case AF_INET6: |
7e1dc7b6 | 1318 | return (xfrm_address_t *)&fl->u.ip6.daddr; |
1da177e4 LT |
1319 | } |
1320 | return NULL; | |
1321 | } | |
1322 | ||
1323 | static __inline__ | |
e8a4e377 | 1324 | xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1325 | { |
1326 | switch (family){ | |
1327 | case AF_INET: | |
7e1dc7b6 | 1328 | return (xfrm_address_t *)&fl->u.ip4.saddr; |
1da177e4 | 1329 | case AF_INET6: |
7e1dc7b6 | 1330 | return (xfrm_address_t *)&fl->u.ip6.saddr; |
1da177e4 LT |
1331 | } |
1332 | return NULL; | |
1333 | } | |
1334 | ||
9bb182a7 | 1335 | static __inline__ |
e8a4e377 | 1336 | void xfrm_flowi_addr_get(const struct flowi *fl, |
9bb182a7 YH |
1337 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
1338 | unsigned short family) | |
1339 | { | |
1340 | switch(family) { | |
1341 | case AF_INET: | |
7e1dc7b6 DM |
1342 | memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); |
1343 | memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); | |
9bb182a7 YH |
1344 | break; |
1345 | case AF_INET6: | |
15e318bd JB |
1346 | saddr->in6 = fl->u.ip6.saddr; |
1347 | daddr->in6 = fl->u.ip6.daddr; | |
9bb182a7 YH |
1348 | break; |
1349 | } | |
1350 | } | |
1351 | ||
1da177e4 | 1352 | static __inline__ int |
f8848067 DM |
1353 | __xfrm4_state_addr_check(const struct xfrm_state *x, |
1354 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 LT |
1355 | { |
1356 | if (daddr->a4 == x->id.daddr.a4 && | |
1357 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
1358 | return 1; | |
1359 | return 0; | |
1360 | } | |
1361 | ||
1362 | static __inline__ int | |
f8848067 DM |
1363 | __xfrm6_state_addr_check(const struct xfrm_state *x, |
1364 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 | 1365 | { |
ff88b30c YH |
1366 | if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && |
1367 | (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || | |
82695b30 | 1368 | ipv6_addr_any((struct in6_addr *)saddr) || |
1da177e4 LT |
1369 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) |
1370 | return 1; | |
1371 | return 0; | |
1372 | } | |
1373 | ||
1374 | static __inline__ int | |
f8848067 DM |
1375 | xfrm_state_addr_check(const struct xfrm_state *x, |
1376 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, | |
1da177e4 LT |
1377 | unsigned short family) |
1378 | { | |
1379 | switch (family) { | |
1380 | case AF_INET: | |
1381 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
1382 | case AF_INET6: | |
1383 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
1384 | } | |
1385 | return 0; | |
1386 | } | |
1387 | ||
e53820de | 1388 | static __inline__ int |
f8848067 | 1389 | xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, |
e53820de MN |
1390 | unsigned short family) |
1391 | { | |
1392 | switch (family) { | |
1393 | case AF_INET: | |
1394 | return __xfrm4_state_addr_check(x, | |
7e1dc7b6 DM |
1395 | (const xfrm_address_t *)&fl->u.ip4.daddr, |
1396 | (const xfrm_address_t *)&fl->u.ip4.saddr); | |
e53820de MN |
1397 | case AF_INET6: |
1398 | return __xfrm6_state_addr_check(x, | |
7e1dc7b6 DM |
1399 | (const xfrm_address_t *)&fl->u.ip6.daddr, |
1400 | (const xfrm_address_t *)&fl->u.ip6.saddr); | |
e53820de MN |
1401 | } |
1402 | return 0; | |
1403 | } | |
1404 | ||
f8848067 | 1405 | static inline int xfrm_state_kern(const struct xfrm_state *x) |
1da177e4 LT |
1406 | { |
1407 | return atomic_read(&x->tunnel_users); | |
1408 | } | |
1409 | ||
dbb2483b CW |
1410 | static inline bool xfrm_id_proto_valid(u8 proto) |
1411 | { | |
1412 | switch (proto) { | |
1413 | case IPPROTO_AH: | |
1414 | case IPPROTO_ESP: | |
1415 | case IPPROTO_COMP: | |
1416 | #if IS_ENABLED(CONFIG_IPV6) | |
1417 | case IPPROTO_ROUTING: | |
1418 | case IPPROTO_DSTOPTS: | |
1419 | #endif | |
1420 | return true; | |
1421 | default: | |
1422 | return false; | |
1423 | } | |
1424 | } | |
1425 | ||
1426 | /* IPSEC_PROTO_ANY only matches 3 IPsec protocols, 0 could match all. */ | |
5794708f MN |
1427 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1428 | { | |
dc00a525 MN |
1429 | return (!userproto || proto == userproto || |
1430 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
1431 | proto == IPPROTO_ESP || | |
1432 | proto == IPPROTO_COMP))); | |
5794708f MN |
1433 | } |
1434 | ||
1da177e4 LT |
1435 | /* |
1436 | * xfrm algorithm information | |
1437 | */ | |
1a6509d9 | 1438 | struct xfrm_algo_aead_info { |
165ecc63 | 1439 | char *geniv; |
1a6509d9 HX |
1440 | u16 icv_truncbits; |
1441 | }; | |
1442 | ||
1da177e4 LT |
1443 | struct xfrm_algo_auth_info { |
1444 | u16 icv_truncbits; | |
1445 | u16 icv_fullbits; | |
1446 | }; | |
1447 | ||
1448 | struct xfrm_algo_encr_info { | |
165ecc63 | 1449 | char *geniv; |
1da177e4 LT |
1450 | u16 blockbits; |
1451 | u16 defkeybits; | |
1452 | }; | |
1453 | ||
1454 | struct xfrm_algo_comp_info { | |
1455 | u16 threshold; | |
1456 | }; | |
1457 | ||
1458 | struct xfrm_algo_desc { | |
1459 | char *name; | |
04ff1260 | 1460 | char *compat; |
1da177e4 | 1461 | u8 available:1; |
7e50f84c | 1462 | u8 pfkey_supported:1; |
1da177e4 | 1463 | union { |
1a6509d9 | 1464 | struct xfrm_algo_aead_info aead; |
1da177e4 LT |
1465 | struct xfrm_algo_auth_info auth; |
1466 | struct xfrm_algo_encr_info encr; | |
1467 | struct xfrm_algo_comp_info comp; | |
1468 | } uinfo; | |
1469 | struct sadb_alg desc; | |
1470 | }; | |
1471 | ||
3328715e SK |
1472 | /* XFRM protocol handlers. */ |
1473 | struct xfrm4_protocol { | |
1474 | int (*handler)(struct sk_buff *skb); | |
1475 | int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1476 | int encap_type); | |
1477 | int (*cb_handler)(struct sk_buff *skb, int err); | |
1478 | int (*err_handler)(struct sk_buff *skb, u32 info); | |
1479 | ||
1480 | struct xfrm4_protocol __rcu *next; | |
1481 | int priority; | |
1482 | }; | |
1483 | ||
7e14ea15 | 1484 | struct xfrm6_protocol { |
1da177e4 | 1485 | int (*handler)(struct sk_buff *skb); |
0146dca7 SD |
1486 | int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, |
1487 | int encap_type); | |
7e14ea15 SK |
1488 | int (*cb_handler)(struct sk_buff *skb, int err); |
1489 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
1490 | u8 type, u8 code, int offset, __be32 info); | |
d2acc347 | 1491 | |
7e14ea15 | 1492 | struct xfrm6_protocol __rcu *next; |
d2acc347 | 1493 | int priority; |
1da177e4 LT |
1494 | }; |
1495 | ||
1da177e4 LT |
1496 | /* XFRM tunnel handlers. */ |
1497 | struct xfrm_tunnel { | |
aba82695 | 1498 | int (*handler)(struct sk_buff *skb); |
6df2db5d | 1499 | int (*cb_handler)(struct sk_buff *skb, int err); |
a6337463 | 1500 | int (*err_handler)(struct sk_buff *skb, u32 info); |
d2acc347 | 1501 | |
b33eab08 | 1502 | struct xfrm_tunnel __rcu *next; |
aba82695 FD |
1503 | int priority; |
1504 | }; | |
1505 | ||
1da177e4 | 1506 | struct xfrm6_tunnel { |
d2acc347 | 1507 | int (*handler)(struct sk_buff *skb); |
86afc703 | 1508 | int (*cb_handler)(struct sk_buff *skb, int err); |
d2acc347 | 1509 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, |
d5fdd6ba | 1510 | u8 type, u8 code, int offset, __be32 info); |
6f0bcf15 | 1511 | struct xfrm6_tunnel __rcu *next; |
d2acc347 | 1512 | int priority; |
1da177e4 LT |
1513 | }; |
1514 | ||
d511337a JP |
1515 | void xfrm_init(void); |
1516 | void xfrm4_init(void); | |
1517 | int xfrm_state_init(struct net *net); | |
1518 | void xfrm_state_fini(struct net *net); | |
1519 | void xfrm4_state_init(void); | |
2f32b51b | 1520 | void xfrm4_protocol_init(void); |
c35b7e72 | 1521 | #ifdef CONFIG_XFRM |
d511337a JP |
1522 | int xfrm6_init(void); |
1523 | void xfrm6_fini(void); | |
1524 | int xfrm6_state_init(void); | |
1525 | void xfrm6_state_fini(void); | |
7e14ea15 SK |
1526 | int xfrm6_protocol_init(void); |
1527 | void xfrm6_protocol_fini(void); | |
c35b7e72 DL |
1528 | #else |
1529 | static inline int xfrm6_init(void) | |
1530 | { | |
1531 | return 0; | |
1532 | } | |
1533 | static inline void xfrm6_fini(void) | |
1534 | { | |
1535 | ; | |
1536 | } | |
1537 | #endif | |
1da177e4 | 1538 | |
558f82ef | 1539 | #ifdef CONFIG_XFRM_STATISTICS |
d511337a JP |
1540 | int xfrm_proc_init(struct net *net); |
1541 | void xfrm_proc_fini(struct net *net); | |
558f82ef MN |
1542 | #endif |
1543 | ||
d511337a | 1544 | int xfrm_sysctl_init(struct net *net); |
b27aeadb | 1545 | #ifdef CONFIG_SYSCTL |
d511337a | 1546 | void xfrm_sysctl_fini(struct net *net); |
b27aeadb AD |
1547 | #else |
1548 | static inline void xfrm_sysctl_fini(struct net *net) | |
1549 | { | |
1550 | } | |
1551 | #endif | |
1552 | ||
d3623099 | 1553 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
870a2df4 | 1554 | struct xfrm_address_filter *filter); |
d511337a JP |
1555 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
1556 | int (*func)(struct xfrm_state *, int, void*), void *); | |
283bc9f3 | 1557 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); |
d511337a | 1558 | struct xfrm_state *xfrm_state_alloc(struct net *net); |
4a135e53 | 1559 | void xfrm_state_free(struct xfrm_state *x); |
d511337a JP |
1560 | struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, |
1561 | const xfrm_address_t *saddr, | |
1562 | const struct flowi *fl, | |
1563 | struct xfrm_tmpl *tmpl, | |
1564 | struct xfrm_policy *pol, int *err, | |
bc56b334 | 1565 | unsigned short family, u32 if_id); |
7e652640 | 1566 | struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id, |
d511337a JP |
1567 | xfrm_address_t *daddr, |
1568 | xfrm_address_t *saddr, | |
1569 | unsigned short family, | |
1570 | u8 mode, u8 proto, u32 reqid); | |
c454997e FD |
1571 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
1572 | unsigned short family); | |
d511337a | 1573 | int xfrm_state_check_expire(struct xfrm_state *x); |
f3da86dc LR |
1574 | #ifdef CONFIG_XFRM_OFFLOAD |
1575 | static inline void xfrm_dev_state_update_curlft(struct xfrm_state *x) | |
1576 | { | |
1577 | struct xfrm_dev_offload *xdo = &x->xso; | |
1578 | struct net_device *dev = xdo->dev; | |
1579 | ||
1580 | if (x->xso.type != XFRM_DEV_OFFLOAD_PACKET) | |
1581 | return; | |
1582 | ||
1583 | if (dev && dev->xfrmdev_ops && | |
1584 | dev->xfrmdev_ops->xdo_dev_state_update_curlft) | |
1585 | dev->xfrmdev_ops->xdo_dev_state_update_curlft(x); | |
1586 | ||
1587 | } | |
1588 | #else | |
1589 | static inline void xfrm_dev_state_update_curlft(struct xfrm_state *x) {} | |
1590 | #endif | |
d511337a JP |
1591 | void xfrm_state_insert(struct xfrm_state *x); |
1592 | int xfrm_state_add(struct xfrm_state *x); | |
1593 | int xfrm_state_update(struct xfrm_state *x); | |
1594 | struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, | |
1595 | const xfrm_address_t *daddr, __be32 spi, | |
1596 | u8 proto, unsigned short family); | |
1597 | struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, | |
1598 | const xfrm_address_t *daddr, | |
1599 | const xfrm_address_t *saddr, | |
1600 | u8 proto, | |
1601 | unsigned short family); | |
41a49cc3 | 1602 | #ifdef CONFIG_XFRM_SUB_POLICY |
3aaf3915 | 1603 | void xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, |
d511337a | 1604 | unsigned short family); |
3aaf3915 FW |
1605 | void xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, |
1606 | unsigned short family); | |
41a49cc3 | 1607 | #else |
3aaf3915 FW |
1608 | static inline void xfrm_tmpl_sort(struct xfrm_tmpl **d, struct xfrm_tmpl **s, |
1609 | int n, unsigned short family) | |
41a49cc3 | 1610 | { |
41a49cc3 MN |
1611 | } |
1612 | ||
3aaf3915 FW |
1613 | static inline void xfrm_state_sort(struct xfrm_state **d, struct xfrm_state **s, |
1614 | int n, unsigned short family) | |
41a49cc3 | 1615 | { |
41a49cc3 MN |
1616 | } |
1617 | #endif | |
af11e316 JHS |
1618 | |
1619 | struct xfrmk_sadinfo { | |
1620 | u32 sadhcnt; /* current hash bkts */ | |
1621 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1622 | u32 sadcnt; /* current running count */ | |
1623 | }; | |
1624 | ||
5a6d3416 JHS |
1625 | struct xfrmk_spdinfo { |
1626 | u32 incnt; | |
1627 | u32 outcnt; | |
1628 | u32 fwdcnt; | |
1629 | u32 inscnt; | |
1630 | u32 outscnt; | |
1631 | u32 fwdscnt; | |
1632 | u32 spdhcnt; | |
1633 | u32 spdhmcnt; | |
1634 | }; | |
1635 | ||
d511337a JP |
1636 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1637 | int xfrm_state_delete(struct xfrm_state *x); | |
f75a2804 | 1638 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync); |
d77e38e6 | 1639 | int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid); |
919e43fa LR |
1640 | int xfrm_dev_policy_flush(struct net *net, struct net_device *dev, |
1641 | bool task_valid); | |
d511337a JP |
1642 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); |
1643 | void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); | |
1644 | u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); | |
1cf9a3ae | 1645 | int xfrm_init_replay(struct xfrm_state *x, struct netlink_ext_ack *extack); |
c7b37c76 | 1646 | u32 xfrm_state_mtu(struct xfrm_state *x, int mtu); |
741f9a10 SD |
1647 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload, |
1648 | struct netlink_ext_ack *extack); | |
d511337a | 1649 | int xfrm_init_state(struct xfrm_state *x); |
d511337a JP |
1650 | int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); |
1651 | int xfrm_input_resume(struct sk_buff *skb, int nexthdr); | |
7b380192 SD |
1652 | int xfrm_trans_queue_net(struct net *net, struct sk_buff *skb, |
1653 | int (*finish)(struct net *, struct sock *, | |
1654 | struct sk_buff *)); | |
acf568ee HX |
1655 | int xfrm_trans_queue(struct sk_buff *skb, |
1656 | int (*finish)(struct net *, struct sock *, | |
1657 | struct sk_buff *)); | |
9ab1265d | 1658 | int xfrm_output_resume(struct sock *sk, struct sk_buff *skb, int err); |
7026b1dd | 1659 | int xfrm_output(struct sock *sk, struct sk_buff *skb); |
0c620e97 FW |
1660 | |
1661 | #if IS_ENABLED(CONFIG_NET_PKTGEN) | |
1662 | int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb); | |
1663 | #endif | |
1664 | ||
d511337a | 1665 | void xfrm_local_error(struct sk_buff *skb, int mtu); |
d511337a JP |
1666 | int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
1667 | int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1668 | int encap_type); | |
1669 | int xfrm4_transport_finish(struct sk_buff *skb, int async); | |
1670 | int xfrm4_rcv(struct sk_buff *skb); | |
c4541b41 HX |
1671 | |
1672 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1673 | { | |
70be6c91 | 1674 | XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; |
3328715e SK |
1675 | XFRM_SPI_SKB_CB(skb)->family = AF_INET; |
1676 | XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); | |
1677 | return xfrm_input(skb, nexthdr, spi, 0); | |
c4541b41 HX |
1678 | } |
1679 | ||
ede2059d | 1680 | int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
3328715e SK |
1681 | int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); |
1682 | int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol); | |
d511337a JP |
1683 | int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1684 | int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
d511337a | 1685 | void xfrm4_local_error(struct sk_buff *skb, u32 mtu); |
d511337a | 1686 | int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
63c43787 ND |
1687 | int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi, |
1688 | struct ip6_tnl *t); | |
0146dca7 SD |
1689 | int xfrm6_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
1690 | int encap_type); | |
d511337a | 1691 | int xfrm6_transport_finish(struct sk_buff *skb, int async); |
63c43787 | 1692 | int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t); |
d511337a JP |
1693 | int xfrm6_rcv(struct sk_buff *skb); |
1694 | int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, | |
1695 | xfrm_address_t *saddr, u8 proto); | |
7b77d161 | 1696 | void xfrm6_local_error(struct sk_buff *skb, u32 mtu); |
7e14ea15 SK |
1697 | int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol); |
1698 | int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol); | |
d511337a | 1699 | int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
7b77d161 | 1700 | int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); |
d511337a JP |
1701 | __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
1702 | __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); | |
ede2059d | 1703 | int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
1da177e4 LT |
1704 | |
1705 | #ifdef CONFIG_XFRM | |
3e50ddd8 | 1706 | void xfrm6_local_rxpmtu(struct sk_buff *skb, u32 mtu); |
d511337a | 1707 | int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
0146dca7 | 1708 | int xfrm6_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
c6d1b26a CH |
1709 | int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval, |
1710 | int optlen); | |
1da177e4 | 1711 | #else |
c6d1b26a CH |
1712 | static inline int xfrm_user_policy(struct sock *sk, int optname, |
1713 | sockptr_t optval, int optlen) | |
1da177e4 LT |
1714 | { |
1715 | return -ENOPROTOOPT; | |
82695b30 | 1716 | } |
1da177e4 LT |
1717 | #endif |
1718 | ||
d77e38e6 SK |
1719 | struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif, |
1720 | const xfrm_address_t *saddr, | |
1721 | const xfrm_address_t *daddr, | |
077fbac4 | 1722 | int family, u32 mark); |
d77e38e6 | 1723 | |
0331b1f3 | 1724 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
4c563f76 | 1725 | |
d511337a JP |
1726 | void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
1727 | int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, | |
1728 | int (*func)(struct xfrm_policy *, int, int, void*), | |
1729 | void *); | |
283bc9f3 | 1730 | void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); |
1da177e4 | 1731 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
4f47e8ab XL |
1732 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, |
1733 | const struct xfrm_mark *mark, | |
1734 | u32 if_id, u8 type, int dir, | |
4e81bb83 | 1735 | struct xfrm_selector *sel, |
ef41aaa0 EP |
1736 | struct xfrm_sec_ctx *ctx, int delete, |
1737 | int *err); | |
4f47e8ab XL |
1738 | struct xfrm_policy *xfrm_policy_byid(struct net *net, |
1739 | const struct xfrm_mark *mark, u32 if_id, | |
1740 | u8 type, int dir, u32 id, int delete, | |
1741 | int *err); | |
2e71029e | 1742 | int xfrm_policy_flush(struct net *net, u8 type, bool task_valid); |
880a6fab | 1743 | void xfrm_policy_hash_rebuild(struct net *net); |
1da177e4 | 1744 | u32 xfrm_get_acqseq(void); |
c2dad11e SD |
1745 | int verify_spi_info(u8 proto, u32 min, u32 max, struct netlink_ext_ack *extack); |
1746 | int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi, | |
1747 | struct netlink_ext_ack *extack); | |
e473fcb4 | 1748 | struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, |
7e652640 | 1749 | u8 mode, u32 reqid, u32 if_id, u8 proto, |
a70486f0 DM |
1750 | const xfrm_address_t *daddr, |
1751 | const xfrm_address_t *saddr, int create, | |
bd55775c | 1752 | unsigned short family); |
d511337a | 1753 | int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
1da177e4 | 1754 | |
80c9abaa | 1755 | #ifdef CONFIG_XFRM_MIGRATE |
d511337a JP |
1756 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1757 | const struct xfrm_migrate *m, int num_bundles, | |
8bafd730 AA |
1758 | const struct xfrm_kmaddress *k, |
1759 | const struct xfrm_encap_tmpl *encap); | |
c1aca308 YY |
1760 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net, |
1761 | u32 if_id); | |
d511337a | 1762 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
4ab47d47 AA |
1763 | struct xfrm_migrate *m, |
1764 | struct xfrm_encap_tmpl *encap); | |
d511337a JP |
1765 | int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1766 | struct xfrm_migrate *m, int num_bundles, | |
4ab47d47 | 1767 | struct xfrm_kmaddress *k, struct net *net, |
bd122403 SD |
1768 | struct xfrm_encap_tmpl *encap, u32 if_id, |
1769 | struct netlink_ext_ack *extack); | |
80c9abaa SS |
1770 | #endif |
1771 | ||
d511337a JP |
1772 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
1773 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); | |
1774 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, | |
1775 | xfrm_address_t *addr); | |
1776 | ||
1777 | void xfrm_input_init(void); | |
1778 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); | |
1779 | ||
1780 | void xfrm_probe_algs(void); | |
1781 | int xfrm_count_pfkey_auth_supported(void); | |
1782 | int xfrm_count_pfkey_enc_supported(void); | |
1783 | struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1784 | struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1785 | struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1786 | struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1787 | struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1788 | struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); | |
1789 | struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); | |
1790 | struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); | |
1791 | struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, | |
1792 | int probe); | |
1da177e4 | 1793 | |
70e94e66 YH |
1794 | static inline bool xfrm6_addr_equal(const xfrm_address_t *a, |
1795 | const xfrm_address_t *b) | |
1796 | { | |
1797 | return ipv6_addr_equal((const struct in6_addr *)a, | |
1798 | (const struct in6_addr *)b); | |
1799 | } | |
1800 | ||
1801 | static inline bool xfrm_addr_equal(const xfrm_address_t *a, | |
1802 | const xfrm_address_t *b, | |
1803 | sa_family_t family) | |
1da177e4 LT |
1804 | { |
1805 | switch (family) { | |
1806 | default: | |
1807 | case AF_INET: | |
70e94e66 | 1808 | return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; |
1da177e4 | 1809 | case AF_INET6: |
70e94e66 | 1810 | return xfrm6_addr_equal(a, b); |
1da177e4 LT |
1811 | } |
1812 | } | |
1813 | ||
77d8d7a6 HX |
1814 | static inline int xfrm_policy_id2dir(u32 index) |
1815 | { | |
1816 | return index & 7; | |
1817 | } | |
1818 | ||
a6483b79 | 1819 | #ifdef CONFIG_XFRM |
c7f87783 | 1820 | void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq); |
adfc2fdb | 1821 | int xfrm_replay_check(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq); |
cfc61c59 | 1822 | void xfrm_replay_notify(struct xfrm_state *x, int event); |
b5a1d1fe | 1823 | int xfrm_replay_overflow(struct xfrm_state *x, struct sk_buff *skb); |
25cfb8bc | 1824 | int xfrm_replay_recheck(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq); |
cfc61c59 | 1825 | |
a6483b79 | 1826 | static inline int xfrm_aevent_is_on(struct net *net) |
f8cd5488 | 1827 | { |
be33690d PM |
1828 | struct sock *nlsk; |
1829 | int ret = 0; | |
1830 | ||
1831 | rcu_read_lock(); | |
a6483b79 | 1832 | nlsk = rcu_dereference(net->xfrm.nlsk); |
be33690d PM |
1833 | if (nlsk) |
1834 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1835 | rcu_read_unlock(); | |
1836 | return ret; | |
f8cd5488 | 1837 | } |
0f24558e HG |
1838 | |
1839 | static inline int xfrm_acquire_is_on(struct net *net) | |
1840 | { | |
1841 | struct sock *nlsk; | |
1842 | int ret = 0; | |
1843 | ||
1844 | rcu_read_lock(); | |
1845 | nlsk = rcu_dereference(net->xfrm.nlsk); | |
1846 | if (nlsk) | |
1847 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE); | |
1848 | rcu_read_unlock(); | |
1849 | ||
1850 | return ret; | |
1851 | } | |
a6483b79 | 1852 | #endif |
f8cd5488 | 1853 | |
373b8eeb | 1854 | static inline unsigned int aead_len(struct xfrm_algo_aead *alg) |
ee5c2317 SK |
1855 | { |
1856 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1857 | } | |
1858 | ||
06cd22f8 | 1859 | static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg) |
0f99be0d ED |
1860 | { |
1861 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1862 | } | |
1863 | ||
1bd963a7 | 1864 | static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) |
4447bb33 MW |
1865 | { |
1866 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1867 | } | |
1868 | ||
5e708e47 | 1869 | static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) |
9736acf3 SK |
1870 | { |
1871 | return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); | |
1872 | } | |
1873 | ||
80c9abaa | 1874 | #ifdef CONFIG_XFRM_MIGRATE |
af2f464e SK |
1875 | static inline int xfrm_replay_clone(struct xfrm_state *x, |
1876 | struct xfrm_state *orig) | |
1877 | { | |
91a46c6d AA |
1878 | |
1879 | x->replay_esn = kmemdup(orig->replay_esn, | |
1880 | xfrm_replay_state_esn_len(orig->replay_esn), | |
af2f464e SK |
1881 | GFP_KERNEL); |
1882 | if (!x->replay_esn) | |
1883 | return -ENOMEM; | |
91a46c6d AA |
1884 | x->preplay_esn = kmemdup(orig->preplay_esn, |
1885 | xfrm_replay_state_esn_len(orig->preplay_esn), | |
af2f464e | 1886 | GFP_KERNEL); |
91a46c6d | 1887 | if (!x->preplay_esn) |
af2f464e | 1888 | return -ENOMEM; |
af2f464e SK |
1889 | |
1890 | return 0; | |
1891 | } | |
1892 | ||
ee5c2317 SK |
1893 | static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig) |
1894 | { | |
1895 | return kmemdup(orig, aead_len(orig), GFP_KERNEL); | |
1896 | } | |
1897 | ||
1898 | ||
80c9abaa SS |
1899 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
1900 | { | |
0f99be0d | 1901 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
80c9abaa SS |
1902 | } |
1903 | ||
4447bb33 MW |
1904 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
1905 | { | |
1906 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); | |
1907 | } | |
1908 | ||
80c9abaa SS |
1909 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
1910 | { | |
1911 | int i; | |
1912 | for (i = 0; i < n; i++) | |
1913 | xfrm_state_put(*(states + i)); | |
1914 | } | |
1915 | ||
1916 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1917 | { | |
1918 | int i; | |
1919 | for (i = 0; i < n; i++) | |
1920 | xfrm_state_delete(*(states + i)); | |
1921 | } | |
1922 | #endif | |
f8cd5488 | 1923 | |
e9a441b6 | 1924 | void __init xfrm_dev_init(void); |
b81f884a HL |
1925 | |
1926 | #ifdef CONFIG_XFRM_OFFLOAD | |
f53c7239 SK |
1927 | void xfrm_dev_resume(struct sk_buff *skb); |
1928 | void xfrm_dev_backlog(struct softnet_data *sd); | |
1929 | struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again); | |
d77e38e6 | 1930 | int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, |
adb5c33e SD |
1931 | struct xfrm_user_offload *xuo, |
1932 | struct netlink_ext_ack *extack); | |
919e43fa LR |
1933 | int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp, |
1934 | struct xfrm_user_offload *xuo, u8 dir, | |
1935 | struct netlink_ext_ack *extack); | |
d77e38e6 SK |
1936 | bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x); |
1937 | ||
50bd870a YE |
1938 | static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x) |
1939 | { | |
87e0a94e | 1940 | struct xfrm_dev_offload *xso = &x->xso; |
50bd870a YE |
1941 | |
1942 | if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn) | |
1943 | xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x); | |
1944 | } | |
1945 | ||
f70f250a SK |
1946 | static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) |
1947 | { | |
1948 | struct xfrm_state *x = dst->xfrm; | |
b6ca8bd5 | 1949 | struct xfrm_dst *xdst; |
f70f250a SK |
1950 | |
1951 | if (!x || !x->type_offload) | |
1952 | return false; | |
1953 | ||
b6ca8bd5 | 1954 | xdst = (struct xfrm_dst *) dst; |
2271d519 SK |
1955 | if (!x->xso.offload_handle && !xdst->child->xfrm) |
1956 | return true; | |
0f6c480f | 1957 | if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) && |
b6ca8bd5 | 1958 | !xdst->child->xfrm) |
f70f250a SK |
1959 | return true; |
1960 | ||
1961 | return false; | |
1962 | } | |
1963 | ||
d77e38e6 SK |
1964 | static inline void xfrm_dev_state_delete(struct xfrm_state *x) |
1965 | { | |
87e0a94e | 1966 | struct xfrm_dev_offload *xso = &x->xso; |
d77e38e6 SK |
1967 | |
1968 | if (xso->dev) | |
1969 | xso->dev->xfrmdev_ops->xdo_dev_state_delete(x); | |
1970 | } | |
1971 | ||
1972 | static inline void xfrm_dev_state_free(struct xfrm_state *x) | |
1973 | { | |
87e0a94e | 1974 | struct xfrm_dev_offload *xso = &x->xso; |
77990464 | 1975 | struct net_device *dev = xso->dev; |
d77e38e6 SK |
1976 | |
1977 | if (dev && dev->xfrmdev_ops) { | |
7f05b467 SN |
1978 | if (dev->xfrmdev_ops->xdo_dev_state_free) |
1979 | dev->xfrmdev_ops->xdo_dev_state_free(x); | |
d77e38e6 | 1980 | xso->dev = NULL; |
d62607c3 | 1981 | netdev_put(dev, &xso->dev_tracker); |
d77e38e6 SK |
1982 | } |
1983 | } | |
919e43fa LR |
1984 | |
1985 | static inline void xfrm_dev_policy_delete(struct xfrm_policy *x) | |
1986 | { | |
1987 | struct xfrm_dev_offload *xdo = &x->xdo; | |
1988 | struct net_device *dev = xdo->dev; | |
1989 | ||
1990 | if (dev && dev->xfrmdev_ops && dev->xfrmdev_ops->xdo_dev_policy_delete) | |
1991 | dev->xfrmdev_ops->xdo_dev_policy_delete(x); | |
1992 | } | |
1993 | ||
1994 | static inline void xfrm_dev_policy_free(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) { | |
2000 | if (dev->xfrmdev_ops->xdo_dev_policy_free) | |
2001 | dev->xfrmdev_ops->xdo_dev_policy_free(x); | |
2002 | xdo->dev = NULL; | |
2003 | netdev_put(dev, &xdo->dev_tracker); | |
2004 | } | |
2005 | } | |
d77e38e6 | 2006 | #else |
f53c7239 SK |
2007 | static inline void xfrm_dev_resume(struct sk_buff *skb) |
2008 | { | |
2009 | } | |
2010 | ||
2011 | static inline void xfrm_dev_backlog(struct softnet_data *sd) | |
2012 | { | |
2013 | } | |
2014 | ||
2015 | static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again) | |
f6e27114 | 2016 | { |
3dca3f38 | 2017 | return skb; |
f6e27114 SK |
2018 | } |
2019 | ||
adb5c33e | 2020 | static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo, struct netlink_ext_ack *extack) |
d77e38e6 SK |
2021 | { |
2022 | return 0; | |
2023 | } | |
2024 | ||
2025 | static inline void xfrm_dev_state_delete(struct xfrm_state *x) | |
2026 | { | |
2027 | } | |
2028 | ||
2029 | static inline void xfrm_dev_state_free(struct xfrm_state *x) | |
2030 | { | |
2031 | } | |
2032 | ||
919e43fa LR |
2033 | static inline int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp, |
2034 | struct xfrm_user_offload *xuo, u8 dir, | |
2035 | struct netlink_ext_ack *extack) | |
2036 | { | |
2037 | return 0; | |
2038 | } | |
2039 | ||
2040 | static inline void xfrm_dev_policy_delete(struct xfrm_policy *x) | |
2041 | { | |
2042 | } | |
2043 | ||
2044 | static inline void xfrm_dev_policy_free(struct xfrm_policy *x) | |
2045 | { | |
2046 | } | |
2047 | ||
d77e38e6 SK |
2048 | static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x) |
2049 | { | |
2050 | return false; | |
2051 | } | |
f70f250a | 2052 | |
50bd870a YE |
2053 | static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x) |
2054 | { | |
2055 | } | |
2056 | ||
f70f250a SK |
2057 | static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) |
2058 | { | |
2059 | return false; | |
2060 | } | |
d77e38e6 SK |
2061 | #endif |
2062 | ||
bf825f81 JHS |
2063 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
2064 | { | |
2065 | if (attrs[XFRMA_MARK]) | |
4efd7e83 | 2066 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
bf825f81 JHS |
2067 | else |
2068 | m->v = m->m = 0; | |
2069 | ||
2070 | return m->v & m->m; | |
2071 | } | |
2072 | ||
e3dfa389 | 2073 | static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) |
bf825f81 | 2074 | { |
1d1e34dd | 2075 | int ret = 0; |
bf825f81 | 2076 | |
1d1e34dd DM |
2077 | if (m->m | m->v) |
2078 | ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); | |
2079 | return ret; | |
bf825f81 JHS |
2080 | } |
2081 | ||
9b42c1f1 SK |
2082 | static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x) |
2083 | { | |
2084 | struct xfrm_mark *m = &x->props.smark; | |
2085 | ||
2086 | return (m->v & m->m) | (mark & ~m->m); | |
2087 | } | |
2088 | ||
7e652640 SK |
2089 | static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id) |
2090 | { | |
2091 | int ret = 0; | |
2092 | ||
2093 | if (if_id) | |
2094 | ret = nla_put_u32(skb, XFRMA_IF_ID, if_id); | |
2095 | return ret; | |
2096 | } | |
2097 | ||
70be6c91 SK |
2098 | static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, |
2099 | unsigned int family) | |
2100 | { | |
2101 | bool tunnel = false; | |
2102 | ||
2103 | switch(family) { | |
2104 | case AF_INET: | |
2105 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) | |
2106 | tunnel = true; | |
2107 | break; | |
2108 | case AF_INET6: | |
2109 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) | |
2110 | tunnel = true; | |
2111 | break; | |
2112 | } | |
c9500d7b | 2113 | if (tunnel && !(x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL)) |
70be6c91 SK |
2114 | return -EINVAL; |
2115 | ||
2116 | return 0; | |
2117 | } | |
ede64dd2 | 2118 | |
5461fc0c | 2119 | extern const int xfrm_msg_min[XFRM_NR_MSGTYPES]; |
5106f4a8 | 2120 | extern const struct nla_policy xfrma_policy[XFRMA_MAX+1]; |
5461fc0c | 2121 | |
c9e7c76d | 2122 | struct xfrm_translator { |
5461fc0c DS |
2123 | /* Allocate frag_list and put compat translation there */ |
2124 | int (*alloc_compat)(struct sk_buff *skb, const struct nlmsghdr *src); | |
2125 | ||
5106f4a8 DS |
2126 | /* Allocate nlmsg with 64-bit translaton of received 32-bit message */ |
2127 | struct nlmsghdr *(*rcv_msg_compat)(const struct nlmsghdr *nlh, | |
2128 | int maxtype, const struct nla_policy *policy, | |
2129 | struct netlink_ext_ack *extack); | |
2130 | ||
96392ee5 DS |
2131 | /* Translate 32-bit user_policy from sockptr */ |
2132 | int (*xlate_user_policy_sockptr)(u8 **pdata32, int optlen); | |
2133 | ||
c9e7c76d DS |
2134 | struct module *owner; |
2135 | }; | |
2136 | ||
2137 | #if IS_ENABLED(CONFIG_XFRM_USER_COMPAT) | |
2138 | extern int xfrm_register_translator(struct xfrm_translator *xtr); | |
2139 | extern int xfrm_unregister_translator(struct xfrm_translator *xtr); | |
2140 | extern struct xfrm_translator *xfrm_get_translator(void); | |
2141 | extern void xfrm_put_translator(struct xfrm_translator *xtr); | |
2142 | #else | |
2143 | static inline struct xfrm_translator *xfrm_get_translator(void) | |
2144 | { | |
2145 | return NULL; | |
2146 | } | |
2147 | static inline void xfrm_put_translator(struct xfrm_translator *xtr) | |
2148 | { | |
2149 | } | |
2150 | #endif | |
2151 | ||
ede64dd2 FW |
2152 | #if IS_ENABLED(CONFIG_IPV6) |
2153 | static inline bool xfrm6_local_dontfrag(const struct sock *sk) | |
2154 | { | |
2155 | int proto; | |
2156 | ||
2157 | if (!sk || sk->sk_family != AF_INET6) | |
2158 | return false; | |
2159 | ||
2160 | proto = sk->sk_protocol; | |
2161 | if (proto == IPPROTO_UDP || proto == IPPROTO_RAW) | |
2162 | return inet6_sk(sk)->dontfrag; | |
2163 | ||
2164 | return false; | |
2165 | } | |
2166 | #endif | |
94151f5a EB |
2167 | |
2168 | #if (IS_BUILTIN(CONFIG_XFRM_INTERFACE) && IS_ENABLED(CONFIG_DEBUG_INFO_BTF)) || \ | |
2169 | (IS_MODULE(CONFIG_XFRM_INTERFACE) && IS_ENABLED(CONFIG_DEBUG_INFO_BTF_MODULES)) | |
2170 | ||
2171 | extern struct metadata_dst __percpu *xfrm_bpf_md_dst; | |
2172 | ||
2173 | int register_xfrm_interface_bpf(void); | |
2174 | ||
2175 | #else | |
2176 | ||
2177 | static inline int register_xfrm_interface_bpf(void) | |
2178 | { | |
2179 | return 0; | |
2180 | } | |
2181 | ||
2182 | #endif | |
2183 | ||
1da177e4 | 2184 | #endif /* _NET_XFRM_H */ |