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 | ||
e0aeb9b9 RS |
141 | enum { |
142 | XFRM_DEV_OFFLOAD_FLAG_ACQ = 1, | |
143 | }; | |
144 | ||
87e0a94e | 145 | struct xfrm_dev_offload { |
d77e38e6 | 146 | struct net_device *dev; |
e1b539bd | 147 | netdevice_tracker dev_tracker; |
bdfd2d1f | 148 | struct net_device *real_dev; |
d77e38e6 | 149 | unsigned long offload_handle; |
482db2f1 | 150 | u8 dir : 2; |
d14f28b8 | 151 | u8 type : 2; |
e0aeb9b9 | 152 | u8 flags : 2; |
d77e38e6 SK |
153 | }; |
154 | ||
c9500d7b FW |
155 | struct xfrm_mode { |
156 | u8 encap; | |
157 | u8 family; | |
158 | u8 flags; | |
159 | }; | |
160 | ||
161 | /* Flags for xfrm_mode. */ | |
162 | enum { | |
163 | XFRM_MODE_FLAG_TUNNEL = 1, | |
164 | }; | |
165 | ||
cfc61c59 FW |
166 | enum xfrm_replay_mode { |
167 | XFRM_REPLAY_MODE_LEGACY, | |
168 | XFRM_REPLAY_MODE_BMP, | |
169 | XFRM_REPLAY_MODE_ESN, | |
170 | }; | |
171 | ||
1da177e4 | 172 | /* Full description of state of transformer. */ |
fd2c3ef7 | 173 | struct xfrm_state { |
0c5c9fb5 | 174 | possible_net_t xs_net; |
abb81c4f | 175 | union { |
12a169e7 | 176 | struct hlist_node gclist; |
abb81c4f HX |
177 | struct hlist_node bydst; |
178 | }; | |
8f126e37 DM |
179 | struct hlist_node bysrc; |
180 | struct hlist_node byspi; | |
fe9f1d87 | 181 | struct hlist_node byseq; |
1da177e4 | 182 | |
88755e9c | 183 | refcount_t refcnt; |
1da177e4 LT |
184 | spinlock_t lock; |
185 | ||
186 | struct xfrm_id id; | |
187 | struct xfrm_selector sel; | |
bf825f81 | 188 | struct xfrm_mark mark; |
7e652640 | 189 | u32 if_id; |
35d2856b | 190 | u32 tfcpad; |
1da177e4 | 191 | |
9d4a706d DM |
192 | u32 genid; |
193 | ||
12a169e7 HX |
194 | /* Key manager bits */ |
195 | struct xfrm_state_walk km; | |
1da177e4 LT |
196 | |
197 | /* Parameters of this state. */ | |
198 | struct { | |
199 | u32 reqid; | |
200 | u8 mode; | |
201 | u8 replay_window; | |
202 | u8 aalgo, ealgo, calgo; | |
203 | u8 flags; | |
204 | u16 family; | |
205 | xfrm_address_t saddr; | |
206 | int header_len; | |
207 | int trailer_len; | |
a947b0a9 | 208 | u32 extra_flags; |
9b42c1f1 | 209 | struct xfrm_mark smark; |
1da177e4 LT |
210 | } props; |
211 | ||
212 | struct xfrm_lifetime_cfg lft; | |
213 | ||
214 | /* Data for transformer */ | |
4447bb33 | 215 | struct xfrm_algo_auth *aalg; |
1da177e4 LT |
216 | struct xfrm_algo *ealg; |
217 | struct xfrm_algo *calg; | |
1a6509d9 | 218 | struct xfrm_algo_aead *aead; |
69b0137f | 219 | const char *geniv; |
1da177e4 | 220 | |
4e484b3e AA |
221 | /* mapping change rate limiting */ |
222 | __be16 new_mapping_sport; | |
223 | u32 new_mapping; /* seconds */ | |
224 | u32 mapping_maxage; /* seconds for input SA */ | |
225 | ||
1da177e4 LT |
226 | /* Data for encapsulator */ |
227 | struct xfrm_encap_tmpl *encap; | |
e27cca96 | 228 | struct sock __rcu *encap_sk; |
1da177e4 | 229 | |
060f02a3 NT |
230 | /* Data for care-of address */ |
231 | xfrm_address_t *coaddr; | |
232 | ||
1da177e4 LT |
233 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
234 | struct xfrm_state *tunnel; | |
235 | ||
236 | /* If a tunnel, number of users + 1 */ | |
237 | atomic_t tunnel_users; | |
238 | ||
239 | /* State for replay detection */ | |
240 | struct xfrm_replay_state replay; | |
9736acf3 | 241 | struct xfrm_replay_state_esn *replay_esn; |
1da177e4 | 242 | |
f8cd5488 JHS |
243 | /* Replay detection state at the time we sent the last notification */ |
244 | struct xfrm_replay_state preplay; | |
9736acf3 | 245 | struct xfrm_replay_state_esn *preplay_esn; |
f8cd5488 | 246 | |
cfc61c59 FW |
247 | /* replay detection mode */ |
248 | enum xfrm_replay_mode repl_mode; | |
2717096a JHS |
249 | /* internal flag that only holds state for delayed aevent at the |
250 | * moment | |
251 | */ | |
252 | u32 xflags; | |
253 | ||
f8cd5488 JHS |
254 | /* Replay detection notification settings */ |
255 | u32 replay_maxage; | |
256 | u32 replay_maxdiff; | |
257 | ||
258 | /* Replay detection notification timer */ | |
259 | struct timer_list rtimer; | |
260 | ||
1da177e4 LT |
261 | /* Statistics */ |
262 | struct xfrm_stats stats; | |
263 | ||
264 | struct xfrm_lifetime_cur curlft; | |
671422b2 | 265 | struct hrtimer mtimer; |
1da177e4 | 266 | |
87e0a94e | 267 | struct xfrm_dev_offload xso; |
d77e38e6 | 268 | |
e3c0d047 FD |
269 | /* used to fix curlft->add_time when changing date */ |
270 | long saved_tmo; | |
271 | ||
9afaca05 | 272 | /* Last used time */ |
03dc7a35 | 273 | time64_t lastused; |
9afaca05 | 274 | |
cac2661c SK |
275 | struct page_frag xfrag; |
276 | ||
1da177e4 LT |
277 | /* Reference to data common to all the instances of this |
278 | * transformer. */ | |
533cb5b0 | 279 | const struct xfrm_type *type; |
c9500d7b FW |
280 | struct xfrm_mode inner_mode; |
281 | struct xfrm_mode inner_mode_iaf; | |
282 | struct xfrm_mode outer_mode; | |
1da177e4 | 283 | |
9d389d7f SK |
284 | const struct xfrm_type_offload *type_offload; |
285 | ||
df71837d TJ |
286 | /* Security context */ |
287 | struct xfrm_sec_ctx *security; | |
288 | ||
1da177e4 LT |
289 | /* Private data of this transformer, format is opaque, |
290 | * interpreted by xfrm_type methods. */ | |
291 | void *data; | |
292 | }; | |
293 | ||
673c09be AD |
294 | static inline struct net *xs_net(struct xfrm_state *x) |
295 | { | |
296 | return read_pnet(&x->xs_net); | |
297 | } | |
298 | ||
2717096a JHS |
299 | /* xflags - make enum if more show up */ |
300 | #define XFRM_TIME_DEFER 1 | |
e3c0d047 | 301 | #define XFRM_SOFT_EXPIRE 2 |
2717096a | 302 | |
1da177e4 LT |
303 | enum { |
304 | XFRM_STATE_VOID, | |
305 | XFRM_STATE_ACQ, | |
306 | XFRM_STATE_VALID, | |
307 | XFRM_STATE_ERROR, | |
308 | XFRM_STATE_EXPIRED, | |
309 | XFRM_STATE_DEAD | |
310 | }; | |
311 | ||
26b15dad | 312 | /* callback structure passed from either netlink or pfkey */ |
fd2c3ef7 | 313 | struct km_event { |
bf08867f HX |
314 | union { |
315 | u32 hard; | |
316 | u32 proto; | |
317 | u32 byid; | |
f8cd5488 | 318 | u32 aevent; |
f7b6983f | 319 | u32 type; |
bf08867f HX |
320 | } data; |
321 | ||
26b15dad | 322 | u32 seq; |
15e47304 | 323 | u32 portid; |
26b15dad | 324 | u32 event; |
7067802e | 325 | struct net *net; |
26b15dad JHS |
326 | }; |
327 | ||
abc340b3 EB |
328 | struct xfrm_if_decode_session_result { |
329 | struct net *net; | |
330 | u32 if_id; | |
331 | }; | |
332 | ||
f203b76d | 333 | struct xfrm_if_cb { |
abc340b3 EB |
334 | bool (*decode_session)(struct sk_buff *skb, |
335 | unsigned short family, | |
336 | struct xfrm_if_decode_session_result *res); | |
f203b76d SK |
337 | }; |
338 | ||
339 | void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb); | |
340 | void xfrm_if_unregister_cb(void); | |
341 | ||
25ee3286 | 342 | struct net_device; |
1da177e4 LT |
343 | struct xfrm_type; |
344 | struct xfrm_dst; | |
345 | struct xfrm_policy_afinfo { | |
1da177e4 | 346 | struct dst_ops *dst_ops; |
42a7b32b DA |
347 | struct dst_entry *(*dst_lookup)(struct net *net, |
348 | int tos, int oif, | |
5e6b930f | 349 | const xfrm_address_t *saddr, |
077fbac4 LC |
350 | const xfrm_address_t *daddr, |
351 | u32 mark); | |
42a7b32b DA |
352 | int (*get_saddr)(struct net *net, int oif, |
353 | xfrm_address_t *saddr, | |
077fbac4 LC |
354 | xfrm_address_t *daddr, |
355 | u32 mark); | |
25ee3286 | 356 | int (*fill_dst)(struct xfrm_dst *xdst, |
87c1e12b | 357 | struct net_device *dev, |
0c7b3eef | 358 | const struct flowi *fl); |
2774c131 | 359 | struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); |
1da177e4 LT |
360 | }; |
361 | ||
a2817d8b FW |
362 | int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family); |
363 | void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo); | |
d511337a JP |
364 | void km_policy_notify(struct xfrm_policy *xp, int dir, |
365 | const struct km_event *c); | |
366 | void km_state_notify(struct xfrm_state *x, const struct km_event *c); | |
1da177e4 LT |
367 | |
368 | struct xfrm_tmpl; | |
d511337a JP |
369 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, |
370 | struct xfrm_policy *pol); | |
371 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); | |
372 | int __xfrm_state_delete(struct xfrm_state *x); | |
53bc6b4d | 373 | |
1da177e4 | 374 | struct xfrm_state_afinfo { |
4c203b04 FW |
375 | u8 family; |
376 | u8 proto; | |
4f518e80 FW |
377 | |
378 | const struct xfrm_type_offload *type_offload_esp; | |
379 | ||
380 | const struct xfrm_type *type_esp; | |
381 | const struct xfrm_type *type_ipip; | |
382 | const struct xfrm_type *type_ipip6; | |
383 | const struct xfrm_type *type_comp; | |
384 | const struct xfrm_type *type_ah; | |
385 | const struct xfrm_type *type_routing; | |
386 | const struct xfrm_type *type_dstopts; | |
9d389d7f | 387 | |
ede2059d | 388 | int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb); |
716062fd HX |
389 | int (*transport_finish)(struct sk_buff *skb, |
390 | int async); | |
628e341f | 391 | void (*local_error)(struct sk_buff *skb, u32 mtu); |
1da177e4 LT |
392 | }; |
393 | ||
d511337a JP |
394 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); |
395 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
396 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); | |
711059b9 | 397 | struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family); |
1da177e4 | 398 | |
2f32b51b | 399 | struct xfrm_input_afinfo { |
1475ee0a XL |
400 | u8 family; |
401 | bool is_ipip; | |
2f32b51b SK |
402 | int (*callback)(struct sk_buff *skb, u8 protocol, |
403 | int err); | |
404 | }; | |
405 | ||
960fdfde FW |
406 | int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo); |
407 | int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo); | |
2f32b51b | 408 | |
b48c05ab | 409 | void xfrm_flush_gc(void); |
d511337a | 410 | void xfrm_state_delete_tunnel(struct xfrm_state *x); |
1da177e4 | 411 | |
fd2c3ef7 | 412 | struct xfrm_type { |
1da177e4 | 413 | struct module *owner; |
a6337463 | 414 | u8 proto; |
415 | u8 flags; | |
1b5c2299 | 416 | #define XFRM_TYPE_NON_FRAGMENT 1 |
436a0a40 | 417 | #define XFRM_TYPE_REPLAY_PROT 2 |
f04e7e8d HX |
418 | #define XFRM_TYPE_LOCAL_COADDR 4 |
419 | #define XFRM_TYPE_REMOTE_COADDR 8 | |
1da177e4 | 420 | |
e1e10b44 SD |
421 | int (*init_state)(struct xfrm_state *x, |
422 | struct netlink_ext_ack *extack); | |
1da177e4 | 423 | void (*destructor)(struct xfrm_state *); |
e695633e | 424 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 425 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
8f029de2 DM |
426 | int (*reject)(struct xfrm_state *, struct sk_buff *, |
427 | const struct flowi *); | |
1da177e4 LT |
428 | }; |
429 | ||
d511337a | 430 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
4f518e80 | 431 | void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); |
1da177e4 | 432 | |
9d389d7f | 433 | struct xfrm_type_offload { |
9d389d7f SK |
434 | struct module *owner; |
435 | u8 proto; | |
436 | void (*encap)(struct xfrm_state *, struct sk_buff *pskb); | |
437 | int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb); | |
438 | int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features); | |
439 | }; | |
440 | ||
441 | int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family); | |
4f518e80 | 442 | void xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family); |
9d389d7f | 443 | |
df9dcb45 KM |
444 | static inline int xfrm_af2proto(unsigned int family) |
445 | { | |
446 | switch(family) { | |
447 | case AF_INET: | |
448 | return IPPROTO_IPIP; | |
449 | case AF_INET6: | |
450 | return IPPROTO_IPV6; | |
451 | default: | |
452 | return 0; | |
453 | } | |
454 | } | |
455 | ||
4c145dce | 456 | static inline const struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) |
df9dcb45 KM |
457 | { |
458 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || | |
459 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) | |
c9500d7b | 460 | return &x->inner_mode; |
df9dcb45 | 461 | else |
c9500d7b | 462 | return &x->inner_mode_iaf; |
df9dcb45 KM |
463 | } |
464 | ||
fd2c3ef7 | 465 | struct xfrm_tmpl { |
1da177e4 LT |
466 | /* id in template is interpreted as: |
467 | * daddr - destination of tunnel, may be zero for transport mode. | |
468 | * spi - zero to acquire spi. Not zero if spi is static, then | |
469 | * daddr must be fixed too. | |
470 | * proto - AH/ESP/IPCOMP | |
471 | */ | |
472 | struct xfrm_id id; | |
473 | ||
474 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
475 | xfrm_address_t saddr; | |
476 | ||
76b3f055 MK |
477 | unsigned short encap_family; |
478 | ||
a6337463 | 479 | u32 reqid; |
1da177e4 | 480 | |
7e49e6de | 481 | /* Mode: transport, tunnel etc. */ |
a6337463 | 482 | u8 mode; |
1da177e4 LT |
483 | |
484 | /* Sharing mode: unique, this session only, this user only etc. */ | |
a6337463 | 485 | u8 share; |
1da177e4 LT |
486 | |
487 | /* May skip this transfomration if no SA is found */ | |
a6337463 | 488 | u8 optional; |
1da177e4 | 489 | |
c5d18e98 | 490 | /* Skip aalgos/ealgos/calgos checks. */ |
a6337463 | 491 | u8 allalgs; |
c5d18e98 | 492 | |
1da177e4 | 493 | /* Bit mask of algos allowed for acquisition */ |
a6337463 | 494 | u32 aalgos; |
495 | u32 ealgos; | |
496 | u32 calgos; | |
1da177e4 LT |
497 | }; |
498 | ||
622dc828 | 499 | #define XFRM_MAX_DEPTH 6 |
54ef207a | 500 | #define XFRM_MAX_OFFLOAD_DEPTH 1 |
1da177e4 | 501 | |
12a169e7 HX |
502 | struct xfrm_policy_walk_entry { |
503 | struct list_head all; | |
504 | u8 dead; | |
505 | }; | |
506 | ||
507 | struct xfrm_policy_walk { | |
508 | struct xfrm_policy_walk_entry walk; | |
509 | u8 type; | |
510 | u32 seq; | |
511 | }; | |
512 | ||
a0073fe1 SK |
513 | struct xfrm_policy_queue { |
514 | struct sk_buff_head hold_queue; | |
515 | struct timer_list hold_timer; | |
516 | unsigned long timeout; | |
517 | }; | |
518 | ||
fd2c3ef7 | 519 | struct xfrm_policy { |
0c5c9fb5 | 520 | possible_net_t xp_net; |
2518c7c2 DM |
521 | struct hlist_node bydst; |
522 | struct hlist_node byidx; | |
1da177e4 LT |
523 | |
524 | /* This lock only affects elements except for entry. */ | |
525 | rwlock_t lock; | |
850a6212 | 526 | refcount_t refcnt; |
6be3b0db | 527 | u32 pos; |
1da177e4 LT |
528 | struct timer_list timer; |
529 | ||
80c802f3 | 530 | atomic_t genid; |
1da177e4 LT |
531 | u32 priority; |
532 | u32 index; | |
7e652640 | 533 | u32 if_id; |
bf825f81 | 534 | struct xfrm_mark mark; |
1da177e4 LT |
535 | struct xfrm_selector selector; |
536 | struct xfrm_lifetime_cfg lft; | |
537 | struct xfrm_lifetime_cur curlft; | |
12a169e7 | 538 | struct xfrm_policy_walk_entry walk; |
a0073fe1 | 539 | struct xfrm_policy_queue polq; |
9cf545eb | 540 | bool bydst_reinsert; |
46ca5f5d ACM |
541 | u8 type; |
542 | u8 action; | |
543 | u8 flags; | |
46ca5f5d | 544 | u8 xfrm_nr; |
12a169e7 | 545 | u16 family; |
df71837d | 546 | struct xfrm_sec_ctx *security; |
1da177e4 | 547 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
24969fac | 548 | struct hlist_node bydst_inexact_list; |
56f04730 | 549 | struct rcu_head rcu; |
919e43fa LR |
550 | |
551 | struct xfrm_dev_offload xdo; | |
1da177e4 LT |
552 | }; |
553 | ||
63eb23f5 | 554 | static inline struct net *xp_net(const struct xfrm_policy *xp) |
0331b1f3 AD |
555 | { |
556 | return read_pnet(&xp->xp_net); | |
557 | } | |
558 | ||
13c1d189 AE |
559 | struct xfrm_kmaddress { |
560 | xfrm_address_t local; | |
561 | xfrm_address_t remote; | |
562 | u32 reserved; | |
563 | u16 family; | |
564 | }; | |
565 | ||
80c9abaa SS |
566 | struct xfrm_migrate { |
567 | xfrm_address_t old_daddr; | |
568 | xfrm_address_t old_saddr; | |
569 | xfrm_address_t new_daddr; | |
570 | xfrm_address_t new_saddr; | |
571 | u8 proto; | |
572 | u8 mode; | |
573 | u16 reserved; | |
574 | u32 reqid; | |
575 | u16 old_family; | |
576 | u16 new_family; | |
577 | }; | |
578 | ||
f8cd5488 | 579 | #define XFRM_KM_TIMEOUT 30 |
f8cd5488 JHS |
580 | /* what happened */ |
581 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
582 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
583 | ||
584 | /* default aevent timeout in units of 100ms */ | |
585 | #define XFRM_AE_ETIME 10 | |
586 | /* Async Event timer multiplier */ | |
587 | #define XFRM_AE_ETH_M 10 | |
588 | /* default seq threshold size */ | |
589 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 | 590 | |
fd2c3ef7 | 591 | struct xfrm_mgr { |
1da177e4 | 592 | struct list_head list; |
214e005b | 593 | int (*notify)(struct xfrm_state *x, const struct km_event *c); |
65e0736b | 594 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); |
cb969f07 | 595 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 596 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
214e005b | 597 | int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); |
db983c11 | 598 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
183cad12 DM |
599 | int (*migrate)(const struct xfrm_selector *sel, |
600 | u8 dir, u8 type, | |
601 | const struct xfrm_migrate *m, | |
602 | int num_bundles, | |
8bafd730 AA |
603 | const struct xfrm_kmaddress *k, |
604 | const struct xfrm_encap_tmpl *encap); | |
0f24558e | 605 | bool (*is_alive)(const struct km_event *c); |
1da177e4 LT |
606 | }; |
607 | ||
f41b284a ZS |
608 | void xfrm_register_km(struct xfrm_mgr *km); |
609 | void xfrm_unregister_km(struct xfrm_mgr *km); | |
1da177e4 | 610 | |
70be6c91 SK |
611 | struct xfrm_tunnel_skb_cb { |
612 | union { | |
613 | struct inet_skb_parm h4; | |
614 | struct inet6_skb_parm h6; | |
615 | } header; | |
616 | ||
617 | union { | |
618 | struct ip_tunnel *ip4; | |
619 | struct ip6_tnl *ip6; | |
620 | } tunnel; | |
621 | }; | |
622 | ||
623 | #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) | |
624 | ||
436a0a40 HX |
625 | /* |
626 | * This structure is used for the duration where packets are being | |
627 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
628 | * area beyond the generic IP part may be overwritten. | |
629 | */ | |
630 | struct xfrm_skb_cb { | |
70be6c91 | 631 | struct xfrm_tunnel_skb_cb header; |
436a0a40 HX |
632 | |
633 | /* Sequence number for replay protection. */ | |
b318e0e4 | 634 | union { |
1ce3644a SK |
635 | struct { |
636 | __u32 low; | |
637 | __u32 hi; | |
638 | } output; | |
639 | struct { | |
640 | __be32 low; | |
641 | __be32 hi; | |
642 | } input; | |
b318e0e4 | 643 | } seq; |
436a0a40 HX |
644 | }; |
645 | ||
646 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
647 | ||
36cf9acf HX |
648 | /* |
649 | * This structure is used by the afinfo prepare_input/prepare_output functions | |
650 | * to transmit header information to the mode input/output functions. | |
651 | */ | |
652 | struct xfrm_mode_skb_cb { | |
70be6c91 | 653 | struct xfrm_tunnel_skb_cb header; |
36cf9acf HX |
654 | |
655 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
656 | __be16 id; | |
657 | __be16 frag_off; | |
658 | ||
732c8bd5 HX |
659 | /* IP header length (excluding options or extension headers). */ |
660 | u8 ihl; | |
661 | ||
36cf9acf HX |
662 | /* TOS for IPv4, class for IPv6. */ |
663 | u8 tos; | |
664 | ||
665 | /* TTL for IPv4, hop limitfor IPv6. */ | |
666 | u8 ttl; | |
667 | ||
668 | /* Protocol for IPv4, NH for IPv6. */ | |
669 | u8 protocol; | |
670 | ||
732c8bd5 HX |
671 | /* Option length for IPv4, zero for IPv6. */ |
672 | u8 optlen; | |
673 | ||
36cf9acf HX |
674 | /* Used by IPv6 only, zero for IPv4. */ |
675 | u8 flow_lbl[3]; | |
676 | }; | |
677 | ||
678 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
679 | ||
716062fd HX |
680 | /* |
681 | * This structure is used by the input processing to locate the SPI and | |
682 | * related information. | |
683 | */ | |
684 | struct xfrm_spi_skb_cb { | |
70be6c91 | 685 | struct xfrm_tunnel_skb_cb header; |
716062fd | 686 | |
716062fd | 687 | unsigned int daddroff; |
2fcb45b6 | 688 | unsigned int family; |
7785bba2 | 689 | __be32 seq; |
716062fd HX |
690 | }; |
691 | ||
692 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) | |
693 | ||
c9204d9c | 694 | #ifdef CONFIG_AUDITSYSCALL |
afeb14b4 | 695 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
ab5f5e8b JL |
696 | { |
697 | struct audit_buffer *audit_buf = NULL; | |
ab5f5e8b | 698 | |
f7859590 | 699 | if (audit_enabled == AUDIT_OFF) |
afeb14b4 | 700 | return NULL; |
cdfb6b34 | 701 | audit_buf = audit_log_start(audit_context(), GFP_ATOMIC, |
afeb14b4 | 702 | AUDIT_MAC_IPSEC_EVENT); |
ab5f5e8b JL |
703 | if (audit_buf == NULL) |
704 | return NULL; | |
afeb14b4 PM |
705 | audit_log_format(audit_buf, "op=%s", op); |
706 | return audit_buf; | |
707 | } | |
ab5f5e8b | 708 | |
2e71029e | 709 | static inline void xfrm_audit_helper_usrinfo(bool task_valid, |
afeb14b4 PM |
710 | struct audit_buffer *audit_buf) |
711 | { | |
2e71029e TH |
712 | const unsigned int auid = from_kuid(&init_user_ns, task_valid ? |
713 | audit_get_loginuid(current) : | |
714 | INVALID_UID); | |
715 | const unsigned int ses = task_valid ? audit_get_sessionid(current) : | |
f0b75216 | 716 | AUDIT_SID_UNSET; |
2e71029e TH |
717 | |
718 | audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); | |
f1370cc4 | 719 | audit_log_task_context(audit_buf); |
ab5f5e8b JL |
720 | } |
721 | ||
2e71029e TH |
722 | void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid); |
723 | void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
724 | bool task_valid); | |
725 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid); | |
726 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid); | |
d511337a JP |
727 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
728 | struct sk_buff *skb); | |
729 | void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, | |
730 | __be32 net_seq); | |
731 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); | |
732 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, | |
733 | __be32 net_seq); | |
734 | void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, | |
735 | u8 proto); | |
c9204d9c | 736 | #else |
41fef0ee MS |
737 | |
738 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
2e71029e | 739 | bool task_valid) |
41fef0ee MS |
740 | { |
741 | } | |
742 | ||
743 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
2e71029e | 744 | bool task_valid) |
41fef0ee MS |
745 | { |
746 | } | |
747 | ||
748 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
2e71029e | 749 | bool task_valid) |
41fef0ee MS |
750 | { |
751 | } | |
752 | ||
753 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
2e71029e | 754 | bool task_valid) |
41fef0ee MS |
755 | { |
756 | } | |
757 | ||
758 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
759 | struct sk_buff *skb) | |
760 | { | |
761 | } | |
762 | ||
9fdc4883 SK |
763 | static inline void xfrm_audit_state_replay(struct xfrm_state *x, |
764 | struct sk_buff *skb, __be32 net_seq) | |
765 | { | |
766 | } | |
767 | ||
41fef0ee MS |
768 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, |
769 | u16 family) | |
770 | { | |
771 | } | |
772 | ||
773 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
774 | __be32 net_spi, __be32 net_seq) | |
775 | { | |
776 | } | |
777 | ||
778 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
779 | struct sk_buff *skb, u8 proto) | |
780 | { | |
781 | } | |
c9204d9c | 782 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 783 | |
1da177e4 LT |
784 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
785 | { | |
786 | if (likely(policy != NULL)) | |
850a6212 | 787 | refcount_inc(&policy->refcnt); |
1da177e4 LT |
788 | } |
789 | ||
d511337a | 790 | void xfrm_policy_destroy(struct xfrm_policy *policy); |
1da177e4 LT |
791 | |
792 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
793 | { | |
850a6212 | 794 | if (refcount_dec_and_test(&policy->refcnt)) |
64c31b3f | 795 | xfrm_policy_destroy(policy); |
1da177e4 LT |
796 | } |
797 | ||
4e81bb83 MN |
798 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
799 | { | |
800 | int i; | |
801 | for (i = npols - 1; i >= 0; --i) | |
802 | xfrm_pol_put(pols[i]); | |
803 | } | |
4e81bb83 | 804 | |
f75a2804 | 805 | void __xfrm_state_destroy(struct xfrm_state *, bool); |
1da177e4 | 806 | |
21380b81 HX |
807 | static inline void __xfrm_state_put(struct xfrm_state *x) |
808 | { | |
88755e9c | 809 | refcount_dec(&x->refcnt); |
21380b81 HX |
810 | } |
811 | ||
1da177e4 LT |
812 | static inline void xfrm_state_put(struct xfrm_state *x) |
813 | { | |
88755e9c | 814 | if (refcount_dec_and_test(&x->refcnt)) |
f75a2804 CW |
815 | __xfrm_state_destroy(x, false); |
816 | } | |
817 | ||
818 | static inline void xfrm_state_put_sync(struct xfrm_state *x) | |
819 | { | |
820 | if (refcount_dec_and_test(&x->refcnt)) | |
821 | __xfrm_state_destroy(x, true); | |
1da177e4 LT |
822 | } |
823 | ||
824 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
825 | { | |
88755e9c | 826 | refcount_inc(&x->refcnt); |
1da177e4 LT |
827 | } |
828 | ||
1744a8fe | 829 | static inline bool addr_match(const void *token1, const void *token2, |
e1b0048e | 830 | unsigned int prefixlen) |
1da177e4 | 831 | { |
1744a8fe DM |
832 | const __be32 *a1 = token1; |
833 | const __be32 *a2 = token2; | |
e1b0048e AD |
834 | unsigned int pdw; |
835 | unsigned int pbi; | |
1da177e4 | 836 | |
a6337463 | 837 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
1da177e4 LT |
838 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
839 | ||
840 | if (pdw) | |
841 | if (memcmp(a1, a2, pdw << 2)) | |
1744a8fe | 842 | return false; |
1da177e4 LT |
843 | |
844 | if (pbi) { | |
5f19343f | 845 | __be32 mask; |
1da177e4 LT |
846 | |
847 | mask = htonl((0xffffffff) << (32 - pbi)); | |
848 | ||
849 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
1744a8fe | 850 | return false; |
1da177e4 LT |
851 | } |
852 | ||
1744a8fe | 853 | return true; |
1da177e4 LT |
854 | } |
855 | ||
26bff940 AD |
856 | static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) |
857 | { | |
858 | /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ | |
6c786bcb | 859 | if (sizeof(long) == 4 && prefixlen == 0) |
26bff940 | 860 | return true; |
6c786bcb | 861 | return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen))); |
26bff940 AD |
862 | } |
863 | ||
1da177e4 | 864 | static __inline__ |
6281dcc9 | 865 | __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 866 | { |
f9d07e41 | 867 | __be16 port; |
1d28f42c | 868 | switch(fl->flowi_proto) { |
1da177e4 LT |
869 | case IPPROTO_TCP: |
870 | case IPPROTO_UDP: | |
ba4e58ec | 871 | case IPPROTO_UDPLITE: |
1da177e4 | 872 | case IPPROTO_SCTP: |
6281dcc9 | 873 | port = uli->ports.sport; |
1da177e4 LT |
874 | break; |
875 | case IPPROTO_ICMP: | |
876 | case IPPROTO_ICMPV6: | |
6281dcc9 | 877 | port = htons(uli->icmpt.type); |
1da177e4 | 878 | break; |
2ce4272a | 879 | case IPPROTO_MH: |
6281dcc9 | 880 | port = htons(uli->mht.type); |
2ce4272a | 881 | break; |
cc9ff19d | 882 | case IPPROTO_GRE: |
6281dcc9 | 883 | port = htons(ntohl(uli->gre_key) >> 16); |
cc9ff19d | 884 | break; |
1da177e4 LT |
885 | default: |
886 | port = 0; /*XXX*/ | |
887 | } | |
888 | return port; | |
889 | } | |
890 | ||
891 | static __inline__ | |
6281dcc9 | 892 | __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 893 | { |
f9d07e41 | 894 | __be16 port; |
1d28f42c | 895 | switch(fl->flowi_proto) { |
1da177e4 LT |
896 | case IPPROTO_TCP: |
897 | case IPPROTO_UDP: | |
ba4e58ec | 898 | case IPPROTO_UDPLITE: |
1da177e4 | 899 | case IPPROTO_SCTP: |
6281dcc9 | 900 | port = uli->ports.dport; |
1da177e4 LT |
901 | break; |
902 | case IPPROTO_ICMP: | |
903 | case IPPROTO_ICMPV6: | |
6281dcc9 | 904 | port = htons(uli->icmpt.code); |
1da177e4 | 905 | break; |
cc9ff19d | 906 | case IPPROTO_GRE: |
6281dcc9 | 907 | port = htons(ntohl(uli->gre_key) & 0xffff); |
cc9ff19d | 908 | break; |
1da177e4 LT |
909 | default: |
910 | port = 0; /*XXX*/ | |
911 | } | |
912 | return port; | |
913 | } | |
914 | ||
d511337a JP |
915 | bool xfrm_selector_match(const struct xfrm_selector *sel, |
916 | const struct flowi *fl, unsigned short family); | |
1da177e4 | 917 | |
df71837d TJ |
918 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
919 | /* If neither has a context --> match | |
920 | * Otherwise, both must have a context and the sids, doi, alg must match | |
921 | */ | |
bc9b35ad | 922 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d TJ |
923 | { |
924 | return ((!s1 && !s2) || | |
925 | (s1 && s2 && | |
926 | (s1->ctx_sid == s2->ctx_sid) && | |
927 | (s1->ctx_doi == s2->ctx_doi) && | |
928 | (s1->ctx_alg == s2->ctx_alg))); | |
929 | } | |
930 | #else | |
bc9b35ad | 931 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d | 932 | { |
bc9b35ad | 933 | return true; |
df71837d TJ |
934 | } |
935 | #endif | |
936 | ||
1da177e4 LT |
937 | /* A struct encoding bundle of transformations to apply to some set of flow. |
938 | * | |
b6ca8bd5 | 939 | * xdst->child points to the next element of bundle. |
1da177e4 LT |
940 | * dst->xfrm points to an instanse of transformer. |
941 | * | |
942 | * Due to unfortunate limitations of current routing cache, which we | |
943 | * have no time to fix, it mirrors struct rtable and bound to the same | |
944 | * routing key, including saddr,daddr. However, we can have many of | |
945 | * bundles differing by session id. All the bundles grow from a parent | |
946 | * policy rule. | |
947 | */ | |
fd2c3ef7 | 948 | struct xfrm_dst { |
1da177e4 | 949 | union { |
1da177e4 LT |
950 | struct dst_entry dst; |
951 | struct rtable rt; | |
952 | struct rt6_info rt6; | |
953 | } u; | |
954 | struct dst_entry *route; | |
b6ca8bd5 | 955 | struct dst_entry *child; |
0f6c480f | 956 | struct dst_entry *path; |
80c802f3 TT |
957 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; |
958 | int num_pols, num_xfrms; | |
80c802f3 TT |
959 | u32 xfrm_genid; |
960 | u32 policy_genid; | |
1da177e4 LT |
961 | u32 route_mtu_cached; |
962 | u32 child_mtu_cached; | |
92d63dec HY |
963 | u32 route_cookie; |
964 | u32 path_cookie; | |
1da177e4 LT |
965 | }; |
966 | ||
0f6c480f DM |
967 | static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst) |
968 | { | |
969 | #ifdef CONFIG_XFRM | |
101dde42 | 970 | if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) { |
0f6c480f DM |
971 | const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst; |
972 | ||
973 | return xdst->path; | |
974 | } | |
975 | #endif | |
976 | return (struct dst_entry *) dst; | |
977 | } | |
978 | ||
b92cf4aa DM |
979 | static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst) |
980 | { | |
981 | #ifdef CONFIG_XFRM | |
101dde42 | 982 | if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) { |
b6ca8bd5 DM |
983 | struct xfrm_dst *xdst = (struct xfrm_dst *) dst; |
984 | return xdst->child; | |
985 | } | |
b92cf4aa DM |
986 | #endif |
987 | return NULL; | |
988 | } | |
989 | ||
def8b4fa | 990 | #ifdef CONFIG_XFRM |
45b018be DM |
991 | static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child) |
992 | { | |
b6ca8bd5 | 993 | xdst->child = child; |
45b018be DM |
994 | } |
995 | ||
aabc9761 HX |
996 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
997 | { | |
80c802f3 | 998 | xfrm_pols_put(xdst->pols, xdst->num_pols); |
aabc9761 HX |
999 | dst_release(xdst->route); |
1000 | if (likely(xdst->u.dst.xfrm)) | |
1001 | xfrm_state_put(xdst->u.dst.xfrm); | |
1002 | } | |
def8b4fa | 1003 | #endif |
aabc9761 | 1004 | |
d511337a | 1005 | void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); |
aabc9761 | 1006 | |
f203b76d | 1007 | struct xfrm_if_parms { |
f203b76d SK |
1008 | int link; /* ifindex of underlying L2 interface */ |
1009 | u32 if_id; /* interface identifyer */ | |
abc340b3 | 1010 | bool collect_md; |
f203b76d SK |
1011 | }; |
1012 | ||
1013 | struct xfrm_if { | |
1014 | struct xfrm_if __rcu *next; /* next interface in list */ | |
1015 | struct net_device *dev; /* virtual device associated with interface */ | |
f203b76d SK |
1016 | struct net *net; /* netns for packet i/o */ |
1017 | struct xfrm_if_parms p; /* interface parms */ | |
1018 | ||
1019 | struct gro_cells gro_cells; | |
1020 | }; | |
1021 | ||
54ef207a SK |
1022 | struct xfrm_offload { |
1023 | /* Output sequence number for replay protection on offloading. */ | |
1024 | struct { | |
1025 | __u32 low; | |
1026 | __u32 hi; | |
1027 | } seq; | |
1028 | ||
1029 | __u32 flags; | |
1030 | #define SA_DELETE_REQ 1 | |
1031 | #define CRYPTO_DONE 2 | |
1032 | #define CRYPTO_NEXT_DONE 4 | |
1033 | #define CRYPTO_FALLBACK 8 | |
1034 | #define XFRM_GSO_SEGMENT 16 | |
1035 | #define XFRM_GRO 32 | |
b01a277a | 1036 | /* 64 is free */ |
f53c7239 | 1037 | #define XFRM_DEV_RESUME 128 |
94579ac3 | 1038 | #define XFRM_XMIT 256 |
54ef207a SK |
1039 | |
1040 | __u32 status; | |
1041 | #define CRYPTO_SUCCESS 1 | |
1042 | #define CRYPTO_GENERIC_ERROR 2 | |
1043 | #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4 | |
1044 | #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8 | |
1045 | #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16 | |
1046 | #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32 | |
1047 | #define CRYPTO_INVALID_PACKET_SYNTAX 64 | |
1048 | #define CRYPTO_INVALID_PROTOCOL 128 | |
1049 | ||
1050 | __u8 proto; | |
fa453523 | 1051 | __u8 inner_ipproto; |
54ef207a SK |
1052 | }; |
1053 | ||
fd2c3ef7 | 1054 | struct sec_path { |
1da177e4 | 1055 | int len; |
54ef207a | 1056 | int olen; |
1f8b6df6 | 1057 | int verified_cnt; |
54ef207a | 1058 | |
dbe5b4aa | 1059 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
54ef207a | 1060 | struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH]; |
1da177e4 LT |
1061 | }; |
1062 | ||
0ca64da1 | 1063 | struct sec_path *secpath_set(struct sk_buff *skb); |
1da177e4 LT |
1064 | |
1065 | static inline void | |
1066 | secpath_reset(struct sk_buff *skb) | |
1067 | { | |
1068 | #ifdef CONFIG_XFRM | |
4165079b | 1069 | skb_ext_del(skb, SKB_EXT_SEC_PATH); |
1da177e4 LT |
1070 | #endif |
1071 | } | |
1072 | ||
a1e59abf | 1073 | static inline int |
6cc32961 | 1074 | xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) |
a1e59abf PM |
1075 | { |
1076 | switch (family) { | |
1077 | case AF_INET: | |
1078 | return addr->a4 == 0; | |
1079 | case AF_INET6: | |
15e318bd | 1080 | return ipv6_addr_any(&addr->in6); |
a1e59abf PM |
1081 | } |
1082 | return 0; | |
1083 | } | |
1084 | ||
1da177e4 | 1085 | static inline int |
21eddb5c | 1086 | __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1087 | { |
1088 | return (tmpl->saddr.a4 && | |
1089 | tmpl->saddr.a4 != x->props.saddr.a4); | |
1090 | } | |
1091 | ||
1092 | static inline int | |
21eddb5c | 1093 | __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1094 | { |
1095 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
ff88b30c | 1096 | !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); |
1da177e4 LT |
1097 | } |
1098 | ||
1099 | static inline int | |
21eddb5c | 1100 | xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) |
1da177e4 LT |
1101 | { |
1102 | switch (family) { | |
1103 | case AF_INET: | |
1104 | return __xfrm4_state_addr_cmp(tmpl, x); | |
1105 | case AF_INET6: | |
1106 | return __xfrm6_state_addr_cmp(tmpl, x); | |
1107 | } | |
1108 | return !0; | |
1109 | } | |
1110 | ||
5958372d LR |
1111 | #ifdef CONFIG_XFRM |
1112 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) | |
1113 | { | |
1114 | struct sec_path *sp = skb_sec_path(skb); | |
1115 | ||
1116 | return sp->xvec[sp->len - 1]; | |
1117 | } | |
1118 | #endif | |
1119 | ||
1120 | static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb) | |
1121 | { | |
1122 | #ifdef CONFIG_XFRM | |
1123 | struct sec_path *sp = skb_sec_path(skb); | |
1124 | ||
1125 | if (!sp || !sp->olen || sp->len != sp->olen) | |
1126 | return NULL; | |
1127 | ||
1128 | return &sp->ovec[sp->olen - 1]; | |
1129 | #else | |
1130 | return NULL; | |
1131 | #endif | |
1132 | } | |
1133 | ||
1da177e4 | 1134 | #ifdef CONFIG_XFRM |
b58b1f56 ND |
1135 | int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, |
1136 | unsigned short family); | |
1137 | ||
1138 | static inline bool __xfrm_check_nopolicy(struct net *net, struct sk_buff *skb, | |
1139 | int dir) | |
2d151d39 | 1140 | { |
b58b1f56 ND |
1141 | if (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) |
1142 | return net->xfrm.policy_default[dir] == XFRM_USERPOLICY_ACCEPT; | |
1143 | ||
2d151d39 SK |
1144 | return false; |
1145 | } | |
1146 | ||
e6175a2e EB |
1147 | static inline bool __xfrm_check_dev_nopolicy(struct sk_buff *skb, |
1148 | int dir, unsigned short family) | |
1149 | { | |
1150 | if (dir != XFRM_POLICY_OUT && family == AF_INET) { | |
1151 | /* same dst may be used for traffic originating from | |
1152 | * devices with different policy settings. | |
1153 | */ | |
1154 | return IPCB(skb)->flags & IPSKB_NOPOLICY; | |
1155 | } | |
1156 | return skb_dst(skb) && (skb_dst(skb)->flags & DST_NOPOLICY); | |
1157 | } | |
1158 | ||
d5422efe HX |
1159 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
1160 | struct sk_buff *skb, | |
1161 | unsigned int family, int reverse) | |
1da177e4 | 1162 | { |
f6e1e25d | 1163 | struct net *net = dev_net(skb->dev); |
d5422efe | 1164 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
5958372d LR |
1165 | struct xfrm_offload *xo = xfrm_offload(skb); |
1166 | struct xfrm_state *x; | |
d5422efe | 1167 | |
1da177e4 | 1168 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
d5422efe | 1169 | return __xfrm_policy_check(sk, ndir, skb, family); |
4e81bb83 | 1170 | |
5958372d LR |
1171 | if (xo) { |
1172 | x = xfrm_input_state(skb); | |
1173 | if (x->xso.type == XFRM_DEV_OFFLOAD_PACKET) | |
1174 | return (xo->flags & CRYPTO_DONE) && | |
1175 | (xo->status & CRYPTO_SUCCESS); | |
1176 | } | |
1177 | ||
b58b1f56 | 1178 | return __xfrm_check_nopolicy(net, skb, dir) || |
e6175a2e | 1179 | __xfrm_check_dev_nopolicy(skb, dir, family) || |
b58b1f56 | 1180 | __xfrm_policy_check(sk, ndir, skb, family); |
d5422efe HX |
1181 | } |
1182 | ||
1183 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1184 | { | |
1185 | return __xfrm_policy_check2(sk, dir, skb, family, 0); | |
1da177e4 LT |
1186 | } |
1187 | ||
1188 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1189 | { | |
1190 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
1191 | } | |
1192 | ||
1193 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1194 | { | |
1195 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
1196 | } | |
1197 | ||
d5422efe HX |
1198 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1199 | struct sk_buff *skb) | |
1200 | { | |
1201 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); | |
1202 | } | |
1203 | ||
1204 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1205 | struct sk_buff *skb) | |
1206 | { | |
1207 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); | |
1208 | } | |
1209 | ||
2b1dc628 | 1210 | int __xfrm_decode_session(struct net *net, struct sk_buff *skb, struct flowi *fl, |
d511337a | 1211 | unsigned int family, int reverse); |
d5422efe | 1212 | |
2b1dc628 | 1213 | static inline int xfrm_decode_session(struct net *net, struct sk_buff *skb, struct flowi *fl, |
d5422efe HX |
1214 | unsigned int family) |
1215 | { | |
2b1dc628 | 1216 | return __xfrm_decode_session(net, skb, fl, family, 0); |
d5422efe HX |
1217 | } |
1218 | ||
2b1dc628 | 1219 | static inline int xfrm_decode_session_reverse(struct net *net, struct sk_buff *skb, |
d5422efe HX |
1220 | struct flowi *fl, |
1221 | unsigned int family) | |
1222 | { | |
2b1dc628 | 1223 | return __xfrm_decode_session(net, skb, fl, family, 1); |
d5422efe HX |
1224 | } |
1225 | ||
d511337a | 1226 | int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
1da177e4 LT |
1227 | |
1228 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
1229 | { | |
99a66657 AD |
1230 | struct net *net = dev_net(skb->dev); |
1231 | ||
b58b1f56 ND |
1232 | if (!net->xfrm.policy_count[XFRM_POLICY_OUT] && |
1233 | net->xfrm.policy_default[XFRM_POLICY_OUT] == XFRM_USERPOLICY_ACCEPT) | |
1234 | return true; | |
1235 | ||
1236 | return (skb_dst(skb)->flags & DST_NOXFRM) || | |
1237 | __xfrm_route_forward(skb, family); | |
1da177e4 LT |
1238 | } |
1239 | ||
1240 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
1241 | { | |
1242 | return xfrm_route_forward(skb, AF_INET); | |
1243 | } | |
1244 | ||
1245 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
1246 | { | |
1247 | return xfrm_route_forward(skb, AF_INET6); | |
1248 | } | |
1249 | ||
d188ba86 | 1250 | int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk); |
1da177e4 | 1251 | |
d188ba86 | 1252 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) |
1da177e4 | 1253 | { |
e22aa148 | 1254 | if (!sk_fullsock(osk)) |
1255 | return 0; | |
d188ba86 ED |
1256 | sk->sk_policy[0] = NULL; |
1257 | sk->sk_policy[1] = NULL; | |
1258 | if (unlikely(osk->sk_policy[0] || osk->sk_policy[1])) | |
1259 | return __xfrm_sk_clone_policy(sk, osk); | |
1da177e4 LT |
1260 | return 0; |
1261 | } | |
1262 | ||
d511337a | 1263 | int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
1264 | |
1265 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
1266 | { | |
d188ba86 ED |
1267 | struct xfrm_policy *pol; |
1268 | ||
1269 | pol = rcu_dereference_protected(sk->sk_policy[0], 1); | |
1270 | if (unlikely(pol != NULL)) { | |
1271 | xfrm_policy_delete(pol, XFRM_POLICY_MAX); | |
1da177e4 LT |
1272 | sk->sk_policy[0] = NULL; |
1273 | } | |
d188ba86 ED |
1274 | pol = rcu_dereference_protected(sk->sk_policy[1], 1); |
1275 | if (unlikely(pol != NULL)) { | |
1276 | xfrm_policy_delete(pol, XFRM_POLICY_MAX+1); | |
1da177e4 LT |
1277 | sk->sk_policy[1] = NULL; |
1278 | } | |
1279 | } | |
1280 | ||
1281 | #else | |
1282 | ||
1283 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
d188ba86 | 1284 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; } |
82695b30 SH |
1285 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } |
1286 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
1da177e4 | 1287 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
82695b30 SH |
1288 | { |
1289 | return 1; | |
1290 | } | |
1da177e4 LT |
1291 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
1292 | { | |
1293 | return 1; | |
1294 | } | |
1295 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1296 | { | |
1297 | return 1; | |
1298 | } | |
2b1dc628 | 1299 | static inline int xfrm_decode_session_reverse(struct net *net, struct sk_buff *skb, |
d5422efe HX |
1300 | struct flowi *fl, |
1301 | unsigned int family) | |
1302 | { | |
1303 | return -ENOSYS; | |
1304 | } | |
1305 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, | |
1306 | struct sk_buff *skb) | |
1307 | { | |
1308 | return 1; | |
1309 | } | |
1310 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1311 | struct sk_buff *skb) | |
1312 | { | |
1313 | return 1; | |
1314 | } | |
1da177e4 LT |
1315 | #endif |
1316 | ||
1317 | static __inline__ | |
e8a4e377 | 1318 | xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1319 | { |
1320 | switch (family){ | |
1321 | case AF_INET: | |
7e1dc7b6 | 1322 | return (xfrm_address_t *)&fl->u.ip4.daddr; |
1da177e4 | 1323 | case AF_INET6: |
7e1dc7b6 | 1324 | return (xfrm_address_t *)&fl->u.ip6.daddr; |
1da177e4 LT |
1325 | } |
1326 | return NULL; | |
1327 | } | |
1328 | ||
1329 | static __inline__ | |
e8a4e377 | 1330 | xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1331 | { |
1332 | switch (family){ | |
1333 | case AF_INET: | |
7e1dc7b6 | 1334 | return (xfrm_address_t *)&fl->u.ip4.saddr; |
1da177e4 | 1335 | case AF_INET6: |
7e1dc7b6 | 1336 | return (xfrm_address_t *)&fl->u.ip6.saddr; |
1da177e4 LT |
1337 | } |
1338 | return NULL; | |
1339 | } | |
1340 | ||
9bb182a7 | 1341 | static __inline__ |
e8a4e377 | 1342 | void xfrm_flowi_addr_get(const struct flowi *fl, |
9bb182a7 YH |
1343 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
1344 | unsigned short family) | |
1345 | { | |
1346 | switch(family) { | |
1347 | case AF_INET: | |
7e1dc7b6 DM |
1348 | memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); |
1349 | memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); | |
9bb182a7 YH |
1350 | break; |
1351 | case AF_INET6: | |
15e318bd JB |
1352 | saddr->in6 = fl->u.ip6.saddr; |
1353 | daddr->in6 = fl->u.ip6.daddr; | |
9bb182a7 YH |
1354 | break; |
1355 | } | |
1356 | } | |
1357 | ||
1da177e4 | 1358 | static __inline__ int |
f8848067 DM |
1359 | __xfrm4_state_addr_check(const struct xfrm_state *x, |
1360 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 LT |
1361 | { |
1362 | if (daddr->a4 == x->id.daddr.a4 && | |
1363 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
1364 | return 1; | |
1365 | return 0; | |
1366 | } | |
1367 | ||
1368 | static __inline__ int | |
f8848067 DM |
1369 | __xfrm6_state_addr_check(const struct xfrm_state *x, |
1370 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 | 1371 | { |
ff88b30c YH |
1372 | if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && |
1373 | (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || | |
82695b30 | 1374 | ipv6_addr_any((struct in6_addr *)saddr) || |
1da177e4 LT |
1375 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) |
1376 | return 1; | |
1377 | return 0; | |
1378 | } | |
1379 | ||
1380 | static __inline__ int | |
f8848067 DM |
1381 | xfrm_state_addr_check(const struct xfrm_state *x, |
1382 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, | |
1da177e4 LT |
1383 | unsigned short family) |
1384 | { | |
1385 | switch (family) { | |
1386 | case AF_INET: | |
1387 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
1388 | case AF_INET6: | |
1389 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
1390 | } | |
1391 | return 0; | |
1392 | } | |
1393 | ||
e53820de | 1394 | static __inline__ int |
f8848067 | 1395 | xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, |
e53820de MN |
1396 | unsigned short family) |
1397 | { | |
1398 | switch (family) { | |
1399 | case AF_INET: | |
1400 | return __xfrm4_state_addr_check(x, | |
7e1dc7b6 DM |
1401 | (const xfrm_address_t *)&fl->u.ip4.daddr, |
1402 | (const xfrm_address_t *)&fl->u.ip4.saddr); | |
e53820de MN |
1403 | case AF_INET6: |
1404 | return __xfrm6_state_addr_check(x, | |
7e1dc7b6 DM |
1405 | (const xfrm_address_t *)&fl->u.ip6.daddr, |
1406 | (const xfrm_address_t *)&fl->u.ip6.saddr); | |
e53820de MN |
1407 | } |
1408 | return 0; | |
1409 | } | |
1410 | ||
f8848067 | 1411 | static inline int xfrm_state_kern(const struct xfrm_state *x) |
1da177e4 LT |
1412 | { |
1413 | return atomic_read(&x->tunnel_users); | |
1414 | } | |
1415 | ||
dbb2483b CW |
1416 | static inline bool xfrm_id_proto_valid(u8 proto) |
1417 | { | |
1418 | switch (proto) { | |
1419 | case IPPROTO_AH: | |
1420 | case IPPROTO_ESP: | |
1421 | case IPPROTO_COMP: | |
1422 | #if IS_ENABLED(CONFIG_IPV6) | |
1423 | case IPPROTO_ROUTING: | |
1424 | case IPPROTO_DSTOPTS: | |
1425 | #endif | |
1426 | return true; | |
1427 | default: | |
1428 | return false; | |
1429 | } | |
1430 | } | |
1431 | ||
1432 | /* IPSEC_PROTO_ANY only matches 3 IPsec protocols, 0 could match all. */ | |
5794708f MN |
1433 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1434 | { | |
dc00a525 MN |
1435 | return (!userproto || proto == userproto || |
1436 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
1437 | proto == IPPROTO_ESP || | |
1438 | proto == IPPROTO_COMP))); | |
5794708f MN |
1439 | } |
1440 | ||
1da177e4 LT |
1441 | /* |
1442 | * xfrm algorithm information | |
1443 | */ | |
1a6509d9 | 1444 | struct xfrm_algo_aead_info { |
165ecc63 | 1445 | char *geniv; |
1a6509d9 HX |
1446 | u16 icv_truncbits; |
1447 | }; | |
1448 | ||
1da177e4 LT |
1449 | struct xfrm_algo_auth_info { |
1450 | u16 icv_truncbits; | |
1451 | u16 icv_fullbits; | |
1452 | }; | |
1453 | ||
1454 | struct xfrm_algo_encr_info { | |
165ecc63 | 1455 | char *geniv; |
1da177e4 LT |
1456 | u16 blockbits; |
1457 | u16 defkeybits; | |
1458 | }; | |
1459 | ||
1460 | struct xfrm_algo_comp_info { | |
1461 | u16 threshold; | |
1462 | }; | |
1463 | ||
1464 | struct xfrm_algo_desc { | |
1465 | char *name; | |
04ff1260 | 1466 | char *compat; |
1da177e4 | 1467 | u8 available:1; |
7e50f84c | 1468 | u8 pfkey_supported:1; |
1da177e4 | 1469 | union { |
1a6509d9 | 1470 | struct xfrm_algo_aead_info aead; |
1da177e4 LT |
1471 | struct xfrm_algo_auth_info auth; |
1472 | struct xfrm_algo_encr_info encr; | |
1473 | struct xfrm_algo_comp_info comp; | |
1474 | } uinfo; | |
1475 | struct sadb_alg desc; | |
1476 | }; | |
1477 | ||
3328715e SK |
1478 | /* XFRM protocol handlers. */ |
1479 | struct xfrm4_protocol { | |
1480 | int (*handler)(struct sk_buff *skb); | |
1481 | int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1482 | int encap_type); | |
1483 | int (*cb_handler)(struct sk_buff *skb, int err); | |
1484 | int (*err_handler)(struct sk_buff *skb, u32 info); | |
1485 | ||
1486 | struct xfrm4_protocol __rcu *next; | |
1487 | int priority; | |
1488 | }; | |
1489 | ||
7e14ea15 | 1490 | struct xfrm6_protocol { |
1da177e4 | 1491 | int (*handler)(struct sk_buff *skb); |
0146dca7 SD |
1492 | int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, |
1493 | int encap_type); | |
7e14ea15 SK |
1494 | int (*cb_handler)(struct sk_buff *skb, int err); |
1495 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
1496 | u8 type, u8 code, int offset, __be32 info); | |
d2acc347 | 1497 | |
7e14ea15 | 1498 | struct xfrm6_protocol __rcu *next; |
d2acc347 | 1499 | int priority; |
1da177e4 LT |
1500 | }; |
1501 | ||
1da177e4 LT |
1502 | /* XFRM tunnel handlers. */ |
1503 | struct xfrm_tunnel { | |
aba82695 | 1504 | int (*handler)(struct sk_buff *skb); |
6df2db5d | 1505 | int (*cb_handler)(struct sk_buff *skb, int err); |
a6337463 | 1506 | int (*err_handler)(struct sk_buff *skb, u32 info); |
d2acc347 | 1507 | |
b33eab08 | 1508 | struct xfrm_tunnel __rcu *next; |
aba82695 FD |
1509 | int priority; |
1510 | }; | |
1511 | ||
1da177e4 | 1512 | struct xfrm6_tunnel { |
d2acc347 | 1513 | int (*handler)(struct sk_buff *skb); |
86afc703 | 1514 | int (*cb_handler)(struct sk_buff *skb, int err); |
d2acc347 | 1515 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, |
d5fdd6ba | 1516 | u8 type, u8 code, int offset, __be32 info); |
6f0bcf15 | 1517 | struct xfrm6_tunnel __rcu *next; |
d2acc347 | 1518 | int priority; |
1da177e4 LT |
1519 | }; |
1520 | ||
d511337a JP |
1521 | void xfrm_init(void); |
1522 | void xfrm4_init(void); | |
1523 | int xfrm_state_init(struct net *net); | |
1524 | void xfrm_state_fini(struct net *net); | |
1525 | void xfrm4_state_init(void); | |
2f32b51b | 1526 | void xfrm4_protocol_init(void); |
c35b7e72 | 1527 | #ifdef CONFIG_XFRM |
d511337a JP |
1528 | int xfrm6_init(void); |
1529 | void xfrm6_fini(void); | |
1530 | int xfrm6_state_init(void); | |
1531 | void xfrm6_state_fini(void); | |
7e14ea15 SK |
1532 | int xfrm6_protocol_init(void); |
1533 | void xfrm6_protocol_fini(void); | |
c35b7e72 DL |
1534 | #else |
1535 | static inline int xfrm6_init(void) | |
1536 | { | |
1537 | return 0; | |
1538 | } | |
1539 | static inline void xfrm6_fini(void) | |
1540 | { | |
1541 | ; | |
1542 | } | |
1543 | #endif | |
1da177e4 | 1544 | |
558f82ef | 1545 | #ifdef CONFIG_XFRM_STATISTICS |
d511337a JP |
1546 | int xfrm_proc_init(struct net *net); |
1547 | void xfrm_proc_fini(struct net *net); | |
558f82ef MN |
1548 | #endif |
1549 | ||
d511337a | 1550 | int xfrm_sysctl_init(struct net *net); |
b27aeadb | 1551 | #ifdef CONFIG_SYSCTL |
d511337a | 1552 | void xfrm_sysctl_fini(struct net *net); |
b27aeadb AD |
1553 | #else |
1554 | static inline void xfrm_sysctl_fini(struct net *net) | |
1555 | { | |
1556 | } | |
1557 | #endif | |
1558 | ||
d3623099 | 1559 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
870a2df4 | 1560 | struct xfrm_address_filter *filter); |
d511337a JP |
1561 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
1562 | int (*func)(struct xfrm_state *, int, void*), void *); | |
283bc9f3 | 1563 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); |
d511337a | 1564 | struct xfrm_state *xfrm_state_alloc(struct net *net); |
4a135e53 | 1565 | void xfrm_state_free(struct xfrm_state *x); |
d511337a JP |
1566 | struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, |
1567 | const xfrm_address_t *saddr, | |
1568 | const struct flowi *fl, | |
1569 | struct xfrm_tmpl *tmpl, | |
1570 | struct xfrm_policy *pol, int *err, | |
bc56b334 | 1571 | unsigned short family, u32 if_id); |
7e652640 | 1572 | struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id, |
d511337a JP |
1573 | xfrm_address_t *daddr, |
1574 | xfrm_address_t *saddr, | |
1575 | unsigned short family, | |
1576 | u8 mode, u8 proto, u32 reqid); | |
c454997e FD |
1577 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
1578 | unsigned short family); | |
d511337a | 1579 | int xfrm_state_check_expire(struct xfrm_state *x); |
f3da86dc LR |
1580 | #ifdef CONFIG_XFRM_OFFLOAD |
1581 | static inline void xfrm_dev_state_update_curlft(struct xfrm_state *x) | |
1582 | { | |
1583 | struct xfrm_dev_offload *xdo = &x->xso; | |
1584 | struct net_device *dev = xdo->dev; | |
1585 | ||
1586 | if (x->xso.type != XFRM_DEV_OFFLOAD_PACKET) | |
1587 | return; | |
1588 | ||
1589 | if (dev && dev->xfrmdev_ops && | |
1590 | dev->xfrmdev_ops->xdo_dev_state_update_curlft) | |
1591 | dev->xfrmdev_ops->xdo_dev_state_update_curlft(x); | |
1592 | ||
1593 | } | |
1594 | #else | |
1595 | static inline void xfrm_dev_state_update_curlft(struct xfrm_state *x) {} | |
1596 | #endif | |
d511337a JP |
1597 | void xfrm_state_insert(struct xfrm_state *x); |
1598 | int xfrm_state_add(struct xfrm_state *x); | |
1599 | int xfrm_state_update(struct xfrm_state *x); | |
1600 | struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, | |
1601 | const xfrm_address_t *daddr, __be32 spi, | |
1602 | u8 proto, unsigned short family); | |
1603 | struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, | |
1604 | const xfrm_address_t *daddr, | |
1605 | const xfrm_address_t *saddr, | |
1606 | u8 proto, | |
1607 | unsigned short family); | |
41a49cc3 | 1608 | #ifdef CONFIG_XFRM_SUB_POLICY |
3aaf3915 | 1609 | void xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, |
d511337a | 1610 | unsigned short family); |
3aaf3915 FW |
1611 | void xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, |
1612 | unsigned short family); | |
41a49cc3 | 1613 | #else |
3aaf3915 FW |
1614 | static inline void xfrm_tmpl_sort(struct xfrm_tmpl **d, struct xfrm_tmpl **s, |
1615 | int n, unsigned short family) | |
41a49cc3 | 1616 | { |
41a49cc3 MN |
1617 | } |
1618 | ||
3aaf3915 FW |
1619 | static inline void xfrm_state_sort(struct xfrm_state **d, struct xfrm_state **s, |
1620 | int n, unsigned short family) | |
41a49cc3 | 1621 | { |
41a49cc3 MN |
1622 | } |
1623 | #endif | |
af11e316 JHS |
1624 | |
1625 | struct xfrmk_sadinfo { | |
1626 | u32 sadhcnt; /* current hash bkts */ | |
1627 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1628 | u32 sadcnt; /* current running count */ | |
1629 | }; | |
1630 | ||
5a6d3416 JHS |
1631 | struct xfrmk_spdinfo { |
1632 | u32 incnt; | |
1633 | u32 outcnt; | |
1634 | u32 fwdcnt; | |
1635 | u32 inscnt; | |
1636 | u32 outscnt; | |
1637 | u32 fwdscnt; | |
1638 | u32 spdhcnt; | |
1639 | u32 spdhmcnt; | |
1640 | }; | |
1641 | ||
d511337a JP |
1642 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1643 | int xfrm_state_delete(struct xfrm_state *x); | |
f75a2804 | 1644 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync); |
d77e38e6 | 1645 | int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid); |
919e43fa LR |
1646 | int xfrm_dev_policy_flush(struct net *net, struct net_device *dev, |
1647 | bool task_valid); | |
d511337a JP |
1648 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); |
1649 | void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); | |
1650 | u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); | |
1cf9a3ae | 1651 | int xfrm_init_replay(struct xfrm_state *x, struct netlink_ext_ack *extack); |
c7b37c76 | 1652 | u32 xfrm_state_mtu(struct xfrm_state *x, int mtu); |
741f9a10 SD |
1653 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload, |
1654 | struct netlink_ext_ack *extack); | |
d511337a | 1655 | int xfrm_init_state(struct xfrm_state *x); |
d511337a JP |
1656 | int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); |
1657 | int xfrm_input_resume(struct sk_buff *skb, int nexthdr); | |
7b380192 SD |
1658 | int xfrm_trans_queue_net(struct net *net, struct sk_buff *skb, |
1659 | int (*finish)(struct net *, struct sock *, | |
1660 | struct sk_buff *)); | |
acf568ee HX |
1661 | int xfrm_trans_queue(struct sk_buff *skb, |
1662 | int (*finish)(struct net *, struct sock *, | |
1663 | struct sk_buff *)); | |
9ab1265d | 1664 | int xfrm_output_resume(struct sock *sk, struct sk_buff *skb, int err); |
7026b1dd | 1665 | int xfrm_output(struct sock *sk, struct sk_buff *skb); |
0c620e97 FW |
1666 | |
1667 | #if IS_ENABLED(CONFIG_NET_PKTGEN) | |
1668 | int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb); | |
1669 | #endif | |
1670 | ||
d511337a | 1671 | void xfrm_local_error(struct sk_buff *skb, int mtu); |
d511337a JP |
1672 | int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
1673 | int encap_type); | |
1674 | int xfrm4_transport_finish(struct sk_buff *skb, int async); | |
1675 | int xfrm4_rcv(struct sk_buff *skb); | |
c4541b41 HX |
1676 | |
1677 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1678 | { | |
70be6c91 | 1679 | XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; |
3328715e SK |
1680 | XFRM_SPI_SKB_CB(skb)->family = AF_INET; |
1681 | XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); | |
1682 | return xfrm_input(skb, nexthdr, spi, 0); | |
c4541b41 HX |
1683 | } |
1684 | ||
ede2059d | 1685 | int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
3328715e SK |
1686 | int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); |
1687 | int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol); | |
d511337a JP |
1688 | int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1689 | int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
d511337a | 1690 | void xfrm4_local_error(struct sk_buff *skb, u32 mtu); |
63c43787 ND |
1691 | int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi, |
1692 | struct ip6_tnl *t); | |
0146dca7 SD |
1693 | int xfrm6_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
1694 | int encap_type); | |
d511337a | 1695 | int xfrm6_transport_finish(struct sk_buff *skb, int async); |
63c43787 | 1696 | int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t); |
d511337a JP |
1697 | int xfrm6_rcv(struct sk_buff *skb); |
1698 | int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, | |
1699 | xfrm_address_t *saddr, u8 proto); | |
7b77d161 | 1700 | void xfrm6_local_error(struct sk_buff *skb, u32 mtu); |
7e14ea15 SK |
1701 | int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol); |
1702 | int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol); | |
d511337a | 1703 | int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
7b77d161 | 1704 | int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); |
d511337a JP |
1705 | __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
1706 | __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); | |
ede2059d | 1707 | int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
1da177e4 LT |
1708 | |
1709 | #ifdef CONFIG_XFRM | |
3e50ddd8 | 1710 | void xfrm6_local_rxpmtu(struct sk_buff *skb, u32 mtu); |
d511337a | 1711 | int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
0146dca7 | 1712 | int xfrm6_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
172bf009 | 1713 | struct sk_buff *xfrm4_gro_udp_encap_rcv(struct sock *sk, struct list_head *head, |
221ddb72 SK |
1714 | struct sk_buff *skb); |
1715 | struct sk_buff *xfrm6_gro_udp_encap_rcv(struct sock *sk, struct list_head *head, | |
172bf009 | 1716 | struct sk_buff *skb); |
c6d1b26a CH |
1717 | int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval, |
1718 | int optlen); | |
1da177e4 | 1719 | #else |
c6d1b26a CH |
1720 | static inline int xfrm_user_policy(struct sock *sk, int optname, |
1721 | sockptr_t optval, int optlen) | |
1da177e4 LT |
1722 | { |
1723 | return -ENOPROTOOPT; | |
82695b30 | 1724 | } |
1da177e4 LT |
1725 | #endif |
1726 | ||
d77e38e6 SK |
1727 | struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif, |
1728 | const xfrm_address_t *saddr, | |
1729 | const xfrm_address_t *daddr, | |
077fbac4 | 1730 | int family, u32 mark); |
d77e38e6 | 1731 | |
0331b1f3 | 1732 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
4c563f76 | 1733 | |
d511337a JP |
1734 | void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
1735 | int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, | |
1736 | int (*func)(struct xfrm_policy *, int, int, void*), | |
1737 | void *); | |
283bc9f3 | 1738 | void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); |
1da177e4 | 1739 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
4f47e8ab XL |
1740 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, |
1741 | const struct xfrm_mark *mark, | |
1742 | u32 if_id, u8 type, int dir, | |
4e81bb83 | 1743 | struct xfrm_selector *sel, |
ef41aaa0 EP |
1744 | struct xfrm_sec_ctx *ctx, int delete, |
1745 | int *err); | |
4f47e8ab XL |
1746 | struct xfrm_policy *xfrm_policy_byid(struct net *net, |
1747 | const struct xfrm_mark *mark, u32 if_id, | |
1748 | u8 type, int dir, u32 id, int delete, | |
1749 | int *err); | |
2e71029e | 1750 | int xfrm_policy_flush(struct net *net, u8 type, bool task_valid); |
880a6fab | 1751 | void xfrm_policy_hash_rebuild(struct net *net); |
1da177e4 | 1752 | u32 xfrm_get_acqseq(void); |
c2dad11e SD |
1753 | int verify_spi_info(u8 proto, u32 min, u32 max, struct netlink_ext_ack *extack); |
1754 | int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi, | |
1755 | struct netlink_ext_ack *extack); | |
e473fcb4 | 1756 | struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, |
7e652640 | 1757 | u8 mode, u32 reqid, u32 if_id, u8 proto, |
a70486f0 DM |
1758 | const xfrm_address_t *daddr, |
1759 | const xfrm_address_t *saddr, int create, | |
bd55775c | 1760 | unsigned short family); |
d511337a | 1761 | int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
1da177e4 | 1762 | |
80c9abaa | 1763 | #ifdef CONFIG_XFRM_MIGRATE |
d511337a JP |
1764 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1765 | const struct xfrm_migrate *m, int num_bundles, | |
8bafd730 AA |
1766 | const struct xfrm_kmaddress *k, |
1767 | const struct xfrm_encap_tmpl *encap); | |
c1aca308 YY |
1768 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net, |
1769 | u32 if_id); | |
d511337a | 1770 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
4ab47d47 AA |
1771 | struct xfrm_migrate *m, |
1772 | struct xfrm_encap_tmpl *encap); | |
d511337a JP |
1773 | int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1774 | struct xfrm_migrate *m, int num_bundles, | |
4ab47d47 | 1775 | struct xfrm_kmaddress *k, struct net *net, |
bd122403 SD |
1776 | struct xfrm_encap_tmpl *encap, u32 if_id, |
1777 | struct netlink_ext_ack *extack); | |
80c9abaa SS |
1778 | #endif |
1779 | ||
d511337a JP |
1780 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
1781 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); | |
1782 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, | |
1783 | xfrm_address_t *addr); | |
1784 | ||
1785 | void xfrm_input_init(void); | |
1786 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); | |
1787 | ||
1788 | void xfrm_probe_algs(void); | |
1789 | int xfrm_count_pfkey_auth_supported(void); | |
1790 | int xfrm_count_pfkey_enc_supported(void); | |
1791 | struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1792 | struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1793 | struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1794 | struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1795 | struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1796 | struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); | |
1797 | struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); | |
1798 | struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); | |
1799 | struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, | |
1800 | int probe); | |
1da177e4 | 1801 | |
70e94e66 YH |
1802 | static inline bool xfrm6_addr_equal(const xfrm_address_t *a, |
1803 | const xfrm_address_t *b) | |
1804 | { | |
1805 | return ipv6_addr_equal((const struct in6_addr *)a, | |
1806 | (const struct in6_addr *)b); | |
1807 | } | |
1808 | ||
1809 | static inline bool xfrm_addr_equal(const xfrm_address_t *a, | |
1810 | const xfrm_address_t *b, | |
1811 | sa_family_t family) | |
1da177e4 LT |
1812 | { |
1813 | switch (family) { | |
1814 | default: | |
1815 | case AF_INET: | |
70e94e66 | 1816 | return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; |
1da177e4 | 1817 | case AF_INET6: |
70e94e66 | 1818 | return xfrm6_addr_equal(a, b); |
1da177e4 LT |
1819 | } |
1820 | } | |
1821 | ||
77d8d7a6 HX |
1822 | static inline int xfrm_policy_id2dir(u32 index) |
1823 | { | |
1824 | return index & 7; | |
1825 | } | |
1826 | ||
a6483b79 | 1827 | #ifdef CONFIG_XFRM |
c7f87783 | 1828 | void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq); |
adfc2fdb | 1829 | int xfrm_replay_check(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq); |
cfc61c59 | 1830 | void xfrm_replay_notify(struct xfrm_state *x, int event); |
b5a1d1fe | 1831 | int xfrm_replay_overflow(struct xfrm_state *x, struct sk_buff *skb); |
25cfb8bc | 1832 | int xfrm_replay_recheck(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq); |
cfc61c59 | 1833 | |
a6483b79 | 1834 | static inline int xfrm_aevent_is_on(struct net *net) |
f8cd5488 | 1835 | { |
be33690d PM |
1836 | struct sock *nlsk; |
1837 | int ret = 0; | |
1838 | ||
1839 | rcu_read_lock(); | |
a6483b79 | 1840 | nlsk = rcu_dereference(net->xfrm.nlsk); |
be33690d PM |
1841 | if (nlsk) |
1842 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1843 | rcu_read_unlock(); | |
1844 | return ret; | |
f8cd5488 | 1845 | } |
0f24558e HG |
1846 | |
1847 | static inline int xfrm_acquire_is_on(struct net *net) | |
1848 | { | |
1849 | struct sock *nlsk; | |
1850 | int ret = 0; | |
1851 | ||
1852 | rcu_read_lock(); | |
1853 | nlsk = rcu_dereference(net->xfrm.nlsk); | |
1854 | if (nlsk) | |
1855 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE); | |
1856 | rcu_read_unlock(); | |
1857 | ||
1858 | return ret; | |
1859 | } | |
a6483b79 | 1860 | #endif |
f8cd5488 | 1861 | |
373b8eeb | 1862 | static inline unsigned int aead_len(struct xfrm_algo_aead *alg) |
ee5c2317 SK |
1863 | { |
1864 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1865 | } | |
1866 | ||
06cd22f8 | 1867 | static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg) |
0f99be0d ED |
1868 | { |
1869 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1870 | } | |
1871 | ||
1bd963a7 | 1872 | static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) |
4447bb33 MW |
1873 | { |
1874 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1875 | } | |
1876 | ||
5e708e47 | 1877 | static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) |
9736acf3 SK |
1878 | { |
1879 | return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); | |
1880 | } | |
1881 | ||
80c9abaa | 1882 | #ifdef CONFIG_XFRM_MIGRATE |
af2f464e SK |
1883 | static inline int xfrm_replay_clone(struct xfrm_state *x, |
1884 | struct xfrm_state *orig) | |
1885 | { | |
91a46c6d AA |
1886 | |
1887 | x->replay_esn = kmemdup(orig->replay_esn, | |
1888 | xfrm_replay_state_esn_len(orig->replay_esn), | |
af2f464e SK |
1889 | GFP_KERNEL); |
1890 | if (!x->replay_esn) | |
1891 | return -ENOMEM; | |
91a46c6d AA |
1892 | x->preplay_esn = kmemdup(orig->preplay_esn, |
1893 | xfrm_replay_state_esn_len(orig->preplay_esn), | |
af2f464e | 1894 | GFP_KERNEL); |
91a46c6d | 1895 | if (!x->preplay_esn) |
af2f464e | 1896 | return -ENOMEM; |
af2f464e SK |
1897 | |
1898 | return 0; | |
1899 | } | |
1900 | ||
ee5c2317 SK |
1901 | static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig) |
1902 | { | |
1903 | return kmemdup(orig, aead_len(orig), GFP_KERNEL); | |
1904 | } | |
1905 | ||
1906 | ||
80c9abaa SS |
1907 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
1908 | { | |
0f99be0d | 1909 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
80c9abaa SS |
1910 | } |
1911 | ||
4447bb33 MW |
1912 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
1913 | { | |
1914 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); | |
1915 | } | |
1916 | ||
80c9abaa SS |
1917 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
1918 | { | |
1919 | int i; | |
1920 | for (i = 0; i < n; i++) | |
1921 | xfrm_state_put(*(states + i)); | |
1922 | } | |
1923 | ||
1924 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1925 | { | |
1926 | int i; | |
1927 | for (i = 0; i < n; i++) | |
1928 | xfrm_state_delete(*(states + i)); | |
1929 | } | |
1930 | #endif | |
f8cd5488 | 1931 | |
e9a441b6 | 1932 | void __init xfrm_dev_init(void); |
b81f884a HL |
1933 | |
1934 | #ifdef CONFIG_XFRM_OFFLOAD | |
f53c7239 SK |
1935 | void xfrm_dev_resume(struct sk_buff *skb); |
1936 | void xfrm_dev_backlog(struct softnet_data *sd); | |
1937 | struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again); | |
d77e38e6 | 1938 | int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, |
adb5c33e SD |
1939 | struct xfrm_user_offload *xuo, |
1940 | struct netlink_ext_ack *extack); | |
919e43fa LR |
1941 | int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp, |
1942 | struct xfrm_user_offload *xuo, u8 dir, | |
1943 | struct netlink_ext_ack *extack); | |
d77e38e6 SK |
1944 | bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x); |
1945 | ||
50bd870a YE |
1946 | static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x) |
1947 | { | |
87e0a94e | 1948 | struct xfrm_dev_offload *xso = &x->xso; |
50bd870a YE |
1949 | |
1950 | if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn) | |
1951 | xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x); | |
1952 | } | |
1953 | ||
f70f250a SK |
1954 | static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) |
1955 | { | |
1956 | struct xfrm_state *x = dst->xfrm; | |
b6ca8bd5 | 1957 | struct xfrm_dst *xdst; |
f70f250a SK |
1958 | |
1959 | if (!x || !x->type_offload) | |
1960 | return false; | |
1961 | ||
b6ca8bd5 | 1962 | xdst = (struct xfrm_dst *) dst; |
2271d519 SK |
1963 | if (!x->xso.offload_handle && !xdst->child->xfrm) |
1964 | return true; | |
0f6c480f | 1965 | if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) && |
b6ca8bd5 | 1966 | !xdst->child->xfrm) |
f70f250a SK |
1967 | return true; |
1968 | ||
1969 | return false; | |
1970 | } | |
1971 | ||
d77e38e6 SK |
1972 | static inline void xfrm_dev_state_delete(struct xfrm_state *x) |
1973 | { | |
87e0a94e | 1974 | struct xfrm_dev_offload *xso = &x->xso; |
d77e38e6 SK |
1975 | |
1976 | if (xso->dev) | |
1977 | xso->dev->xfrmdev_ops->xdo_dev_state_delete(x); | |
1978 | } | |
1979 | ||
1980 | static inline void xfrm_dev_state_free(struct xfrm_state *x) | |
1981 | { | |
87e0a94e | 1982 | struct xfrm_dev_offload *xso = &x->xso; |
77990464 | 1983 | struct net_device *dev = xso->dev; |
d77e38e6 SK |
1984 | |
1985 | if (dev && dev->xfrmdev_ops) { | |
7f05b467 SN |
1986 | if (dev->xfrmdev_ops->xdo_dev_state_free) |
1987 | dev->xfrmdev_ops->xdo_dev_state_free(x); | |
d77e38e6 | 1988 | xso->dev = NULL; |
f3ec2b5d | 1989 | xso->type = XFRM_DEV_OFFLOAD_UNSPECIFIED; |
d62607c3 | 1990 | netdev_put(dev, &xso->dev_tracker); |
d77e38e6 SK |
1991 | } |
1992 | } | |
919e43fa LR |
1993 | |
1994 | static inline void xfrm_dev_policy_delete(struct xfrm_policy *x) | |
1995 | { | |
1996 | struct xfrm_dev_offload *xdo = &x->xdo; | |
1997 | struct net_device *dev = xdo->dev; | |
1998 | ||
1999 | if (dev && dev->xfrmdev_ops && dev->xfrmdev_ops->xdo_dev_policy_delete) | |
2000 | dev->xfrmdev_ops->xdo_dev_policy_delete(x); | |
2001 | } | |
2002 | ||
2003 | static inline void xfrm_dev_policy_free(struct xfrm_policy *x) | |
2004 | { | |
2005 | struct xfrm_dev_offload *xdo = &x->xdo; | |
2006 | struct net_device *dev = xdo->dev; | |
2007 | ||
2008 | if (dev && dev->xfrmdev_ops) { | |
2009 | if (dev->xfrmdev_ops->xdo_dev_policy_free) | |
2010 | dev->xfrmdev_ops->xdo_dev_policy_free(x); | |
2011 | xdo->dev = NULL; | |
2012 | netdev_put(dev, &xdo->dev_tracker); | |
2013 | } | |
2014 | } | |
d77e38e6 | 2015 | #else |
f53c7239 SK |
2016 | static inline void xfrm_dev_resume(struct sk_buff *skb) |
2017 | { | |
2018 | } | |
2019 | ||
2020 | static inline void xfrm_dev_backlog(struct softnet_data *sd) | |
2021 | { | |
2022 | } | |
2023 | ||
2024 | static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again) | |
f6e27114 | 2025 | { |
3dca3f38 | 2026 | return skb; |
f6e27114 SK |
2027 | } |
2028 | ||
adb5c33e | 2029 | static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo, struct netlink_ext_ack *extack) |
d77e38e6 SK |
2030 | { |
2031 | return 0; | |
2032 | } | |
2033 | ||
2034 | static inline void xfrm_dev_state_delete(struct xfrm_state *x) | |
2035 | { | |
2036 | } | |
2037 | ||
2038 | static inline void xfrm_dev_state_free(struct xfrm_state *x) | |
2039 | { | |
2040 | } | |
2041 | ||
919e43fa LR |
2042 | static inline int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp, |
2043 | struct xfrm_user_offload *xuo, u8 dir, | |
2044 | struct netlink_ext_ack *extack) | |
2045 | { | |
2046 | return 0; | |
2047 | } | |
2048 | ||
2049 | static inline void xfrm_dev_policy_delete(struct xfrm_policy *x) | |
2050 | { | |
2051 | } | |
2052 | ||
2053 | static inline void xfrm_dev_policy_free(struct xfrm_policy *x) | |
2054 | { | |
2055 | } | |
2056 | ||
d77e38e6 SK |
2057 | static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x) |
2058 | { | |
2059 | return false; | |
2060 | } | |
f70f250a | 2061 | |
50bd870a YE |
2062 | static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x) |
2063 | { | |
2064 | } | |
2065 | ||
f70f250a SK |
2066 | static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) |
2067 | { | |
2068 | return false; | |
2069 | } | |
d77e38e6 SK |
2070 | #endif |
2071 | ||
bf825f81 JHS |
2072 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
2073 | { | |
2074 | if (attrs[XFRMA_MARK]) | |
4efd7e83 | 2075 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
bf825f81 JHS |
2076 | else |
2077 | m->v = m->m = 0; | |
2078 | ||
2079 | return m->v & m->m; | |
2080 | } | |
2081 | ||
e3dfa389 | 2082 | static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) |
bf825f81 | 2083 | { |
1d1e34dd | 2084 | int ret = 0; |
bf825f81 | 2085 | |
1d1e34dd DM |
2086 | if (m->m | m->v) |
2087 | ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); | |
2088 | return ret; | |
bf825f81 JHS |
2089 | } |
2090 | ||
9b42c1f1 SK |
2091 | static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x) |
2092 | { | |
2093 | struct xfrm_mark *m = &x->props.smark; | |
2094 | ||
2095 | return (m->v & m->m) | (mark & ~m->m); | |
2096 | } | |
2097 | ||
7e652640 SK |
2098 | static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id) |
2099 | { | |
2100 | int ret = 0; | |
2101 | ||
2102 | if (if_id) | |
2103 | ret = nla_put_u32(skb, XFRMA_IF_ID, if_id); | |
2104 | return ret; | |
2105 | } | |
2106 | ||
70be6c91 SK |
2107 | static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, |
2108 | unsigned int family) | |
2109 | { | |
2110 | bool tunnel = false; | |
2111 | ||
2112 | switch(family) { | |
2113 | case AF_INET: | |
2114 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) | |
2115 | tunnel = true; | |
2116 | break; | |
2117 | case AF_INET6: | |
2118 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) | |
2119 | tunnel = true; | |
2120 | break; | |
2121 | } | |
c9500d7b | 2122 | if (tunnel && !(x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL)) |
70be6c91 SK |
2123 | return -EINVAL; |
2124 | ||
2125 | return 0; | |
2126 | } | |
ede64dd2 | 2127 | |
5461fc0c | 2128 | extern const int xfrm_msg_min[XFRM_NR_MSGTYPES]; |
5106f4a8 | 2129 | extern const struct nla_policy xfrma_policy[XFRMA_MAX+1]; |
5461fc0c | 2130 | |
c9e7c76d | 2131 | struct xfrm_translator { |
5461fc0c DS |
2132 | /* Allocate frag_list and put compat translation there */ |
2133 | int (*alloc_compat)(struct sk_buff *skb, const struct nlmsghdr *src); | |
2134 | ||
5106f4a8 DS |
2135 | /* Allocate nlmsg with 64-bit translaton of received 32-bit message */ |
2136 | struct nlmsghdr *(*rcv_msg_compat)(const struct nlmsghdr *nlh, | |
2137 | int maxtype, const struct nla_policy *policy, | |
2138 | struct netlink_ext_ack *extack); | |
2139 | ||
96392ee5 DS |
2140 | /* Translate 32-bit user_policy from sockptr */ |
2141 | int (*xlate_user_policy_sockptr)(u8 **pdata32, int optlen); | |
2142 | ||
c9e7c76d DS |
2143 | struct module *owner; |
2144 | }; | |
2145 | ||
2146 | #if IS_ENABLED(CONFIG_XFRM_USER_COMPAT) | |
2147 | extern int xfrm_register_translator(struct xfrm_translator *xtr); | |
2148 | extern int xfrm_unregister_translator(struct xfrm_translator *xtr); | |
2149 | extern struct xfrm_translator *xfrm_get_translator(void); | |
2150 | extern void xfrm_put_translator(struct xfrm_translator *xtr); | |
2151 | #else | |
2152 | static inline struct xfrm_translator *xfrm_get_translator(void) | |
2153 | { | |
2154 | return NULL; | |
2155 | } | |
2156 | static inline void xfrm_put_translator(struct xfrm_translator *xtr) | |
2157 | { | |
2158 | } | |
2159 | #endif | |
2160 | ||
ede64dd2 FW |
2161 | #if IS_ENABLED(CONFIG_IPV6) |
2162 | static inline bool xfrm6_local_dontfrag(const struct sock *sk) | |
2163 | { | |
2164 | int proto; | |
2165 | ||
2166 | if (!sk || sk->sk_family != AF_INET6) | |
2167 | return false; | |
2168 | ||
2169 | proto = sk->sk_protocol; | |
2170 | if (proto == IPPROTO_UDP || proto == IPPROTO_RAW) | |
1086ca7c | 2171 | return inet6_test_bit(DONTFRAG, sk); |
ede64dd2 FW |
2172 | |
2173 | return false; | |
2174 | } | |
2175 | #endif | |
94151f5a EB |
2176 | |
2177 | #if (IS_BUILTIN(CONFIG_XFRM_INTERFACE) && IS_ENABLED(CONFIG_DEBUG_INFO_BTF)) || \ | |
2178 | (IS_MODULE(CONFIG_XFRM_INTERFACE) && IS_ENABLED(CONFIG_DEBUG_INFO_BTF_MODULES)) | |
2179 | ||
2180 | extern struct metadata_dst __percpu *xfrm_bpf_md_dst; | |
2181 | ||
2182 | int register_xfrm_interface_bpf(void); | |
2183 | ||
2184 | #else | |
2185 | ||
2186 | static inline int register_xfrm_interface_bpf(void) | |
2187 | { | |
2188 | return 0; | |
2189 | } | |
2190 | ||
2191 | #endif | |
2192 | ||
8f0ec8c6 DX |
2193 | #if IS_ENABLED(CONFIG_DEBUG_INFO_BTF) |
2194 | int register_xfrm_state_bpf(void); | |
2195 | #else | |
2196 | static inline int register_xfrm_state_bpf(void) | |
2197 | { | |
2198 | return 0; | |
2199 | } | |
2200 | #endif | |
2201 | ||
1da177e4 | 2202 | #endif /* _NET_XFRM_H */ |