]>
Commit | Line | Data |
---|---|---|
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 | ||
d77e38e6 SK |
129 | struct xfrm_state_offload { |
130 | struct net_device *dev; | |
bdfd2d1f | 131 | struct net_device *real_dev; |
d77e38e6 SK |
132 | unsigned long offload_handle; |
133 | unsigned int num_exthdrs; | |
134 | u8 flags; | |
135 | }; | |
136 | ||
c9500d7b FW |
137 | struct xfrm_mode { |
138 | u8 encap; | |
139 | u8 family; | |
140 | u8 flags; | |
141 | }; | |
142 | ||
143 | /* Flags for xfrm_mode. */ | |
144 | enum { | |
145 | XFRM_MODE_FLAG_TUNNEL = 1, | |
146 | }; | |
147 | ||
1da177e4 | 148 | /* Full description of state of transformer. */ |
fd2c3ef7 | 149 | struct xfrm_state { |
0c5c9fb5 | 150 | possible_net_t xs_net; |
abb81c4f | 151 | union { |
12a169e7 | 152 | struct hlist_node gclist; |
abb81c4f HX |
153 | struct hlist_node bydst; |
154 | }; | |
8f126e37 DM |
155 | struct hlist_node bysrc; |
156 | struct hlist_node byspi; | |
1da177e4 | 157 | |
88755e9c | 158 | refcount_t refcnt; |
1da177e4 LT |
159 | spinlock_t lock; |
160 | ||
161 | struct xfrm_id id; | |
162 | struct xfrm_selector sel; | |
bf825f81 | 163 | struct xfrm_mark mark; |
7e652640 | 164 | u32 if_id; |
35d2856b | 165 | u32 tfcpad; |
1da177e4 | 166 | |
9d4a706d DM |
167 | u32 genid; |
168 | ||
12a169e7 HX |
169 | /* Key manager bits */ |
170 | struct xfrm_state_walk km; | |
1da177e4 LT |
171 | |
172 | /* Parameters of this state. */ | |
173 | struct { | |
174 | u32 reqid; | |
175 | u8 mode; | |
176 | u8 replay_window; | |
177 | u8 aalgo, ealgo, calgo; | |
178 | u8 flags; | |
179 | u16 family; | |
180 | xfrm_address_t saddr; | |
181 | int header_len; | |
182 | int trailer_len; | |
a947b0a9 | 183 | u32 extra_flags; |
9b42c1f1 | 184 | struct xfrm_mark smark; |
1da177e4 LT |
185 | } props; |
186 | ||
187 | struct xfrm_lifetime_cfg lft; | |
188 | ||
189 | /* Data for transformer */ | |
4447bb33 | 190 | struct xfrm_algo_auth *aalg; |
1da177e4 LT |
191 | struct xfrm_algo *ealg; |
192 | struct xfrm_algo *calg; | |
1a6509d9 | 193 | struct xfrm_algo_aead *aead; |
69b0137f | 194 | const char *geniv; |
1da177e4 LT |
195 | |
196 | /* Data for encapsulator */ | |
197 | struct xfrm_encap_tmpl *encap; | |
e27cca96 | 198 | struct sock __rcu *encap_sk; |
1da177e4 | 199 | |
060f02a3 NT |
200 | /* Data for care-of address */ |
201 | xfrm_address_t *coaddr; | |
202 | ||
1da177e4 LT |
203 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
204 | struct xfrm_state *tunnel; | |
205 | ||
206 | /* If a tunnel, number of users + 1 */ | |
207 | atomic_t tunnel_users; | |
208 | ||
209 | /* State for replay detection */ | |
210 | struct xfrm_replay_state replay; | |
9736acf3 | 211 | struct xfrm_replay_state_esn *replay_esn; |
1da177e4 | 212 | |
f8cd5488 JHS |
213 | /* Replay detection state at the time we sent the last notification */ |
214 | struct xfrm_replay_state preplay; | |
9736acf3 | 215 | struct xfrm_replay_state_esn *preplay_esn; |
f8cd5488 | 216 | |
9fdc4883 | 217 | /* The functions for replay detection. */ |
e45a8a9e | 218 | const struct xfrm_replay *repl; |
9fdc4883 | 219 | |
2717096a JHS |
220 | /* internal flag that only holds state for delayed aevent at the |
221 | * moment | |
222 | */ | |
223 | u32 xflags; | |
224 | ||
f8cd5488 JHS |
225 | /* Replay detection notification settings */ |
226 | u32 replay_maxage; | |
227 | u32 replay_maxdiff; | |
228 | ||
229 | /* Replay detection notification timer */ | |
230 | struct timer_list rtimer; | |
231 | ||
1da177e4 LT |
232 | /* Statistics */ |
233 | struct xfrm_stats stats; | |
234 | ||
235 | struct xfrm_lifetime_cur curlft; | |
671422b2 | 236 | struct hrtimer mtimer; |
1da177e4 | 237 | |
d77e38e6 SK |
238 | struct xfrm_state_offload xso; |
239 | ||
e3c0d047 FD |
240 | /* used to fix curlft->add_time when changing date */ |
241 | long saved_tmo; | |
242 | ||
9afaca05 | 243 | /* Last used time */ |
03dc7a35 | 244 | time64_t lastused; |
9afaca05 | 245 | |
cac2661c SK |
246 | struct page_frag xfrag; |
247 | ||
1da177e4 LT |
248 | /* Reference to data common to all the instances of this |
249 | * transformer. */ | |
533cb5b0 | 250 | const struct xfrm_type *type; |
c9500d7b FW |
251 | struct xfrm_mode inner_mode; |
252 | struct xfrm_mode inner_mode_iaf; | |
253 | struct xfrm_mode outer_mode; | |
1da177e4 | 254 | |
9d389d7f SK |
255 | const struct xfrm_type_offload *type_offload; |
256 | ||
df71837d TJ |
257 | /* Security context */ |
258 | struct xfrm_sec_ctx *security; | |
259 | ||
1da177e4 LT |
260 | /* Private data of this transformer, format is opaque, |
261 | * interpreted by xfrm_type methods. */ | |
262 | void *data; | |
263 | }; | |
264 | ||
673c09be AD |
265 | static inline struct net *xs_net(struct xfrm_state *x) |
266 | { | |
267 | return read_pnet(&x->xs_net); | |
268 | } | |
269 | ||
2717096a JHS |
270 | /* xflags - make enum if more show up */ |
271 | #define XFRM_TIME_DEFER 1 | |
e3c0d047 | 272 | #define XFRM_SOFT_EXPIRE 2 |
2717096a | 273 | |
1da177e4 LT |
274 | enum { |
275 | XFRM_STATE_VOID, | |
276 | XFRM_STATE_ACQ, | |
277 | XFRM_STATE_VALID, | |
278 | XFRM_STATE_ERROR, | |
279 | XFRM_STATE_EXPIRED, | |
280 | XFRM_STATE_DEAD | |
281 | }; | |
282 | ||
26b15dad | 283 | /* callback structure passed from either netlink or pfkey */ |
fd2c3ef7 | 284 | struct km_event { |
bf08867f HX |
285 | union { |
286 | u32 hard; | |
287 | u32 proto; | |
288 | u32 byid; | |
f8cd5488 | 289 | u32 aevent; |
f7b6983f | 290 | u32 type; |
bf08867f HX |
291 | } data; |
292 | ||
26b15dad | 293 | u32 seq; |
15e47304 | 294 | u32 portid; |
26b15dad | 295 | u32 event; |
7067802e | 296 | struct net *net; |
26b15dad JHS |
297 | }; |
298 | ||
9fdc4883 SK |
299 | struct xfrm_replay { |
300 | void (*advance)(struct xfrm_state *x, __be32 net_seq); | |
301 | int (*check)(struct xfrm_state *x, | |
302 | struct sk_buff *skb, | |
303 | __be32 net_seq); | |
3b59df46 SK |
304 | int (*recheck)(struct xfrm_state *x, |
305 | struct sk_buff *skb, | |
306 | __be32 net_seq); | |
9fdc4883 SK |
307 | void (*notify)(struct xfrm_state *x, int event); |
308 | int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); | |
309 | }; | |
310 | ||
f203b76d | 311 | struct xfrm_if_cb { |
025c65e1 MW |
312 | struct xfrm_if *(*decode_session)(struct sk_buff *skb, |
313 | unsigned short family); | |
f203b76d SK |
314 | }; |
315 | ||
316 | void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb); | |
317 | void xfrm_if_unregister_cb(void); | |
318 | ||
25ee3286 | 319 | struct net_device; |
1da177e4 LT |
320 | struct xfrm_type; |
321 | struct xfrm_dst; | |
322 | struct xfrm_policy_afinfo { | |
1da177e4 | 323 | struct dst_ops *dst_ops; |
42a7b32b DA |
324 | struct dst_entry *(*dst_lookup)(struct net *net, |
325 | int tos, int oif, | |
5e6b930f | 326 | const xfrm_address_t *saddr, |
077fbac4 LC |
327 | const xfrm_address_t *daddr, |
328 | u32 mark); | |
42a7b32b DA |
329 | int (*get_saddr)(struct net *net, int oif, |
330 | xfrm_address_t *saddr, | |
077fbac4 LC |
331 | xfrm_address_t *daddr, |
332 | u32 mark); | |
25ee3286 | 333 | int (*fill_dst)(struct xfrm_dst *xdst, |
87c1e12b | 334 | struct net_device *dev, |
0c7b3eef | 335 | const struct flowi *fl); |
2774c131 | 336 | struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); |
1da177e4 LT |
337 | }; |
338 | ||
a2817d8b FW |
339 | int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family); |
340 | void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo); | |
d511337a JP |
341 | void km_policy_notify(struct xfrm_policy *xp, int dir, |
342 | const struct km_event *c); | |
343 | void km_state_notify(struct xfrm_state *x, const struct km_event *c); | |
1da177e4 LT |
344 | |
345 | struct xfrm_tmpl; | |
d511337a JP |
346 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, |
347 | struct xfrm_policy *pol); | |
348 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); | |
349 | int __xfrm_state_delete(struct xfrm_state *x); | |
53bc6b4d | 350 | |
1da177e4 | 351 | struct xfrm_state_afinfo { |
4c203b04 FW |
352 | u8 family; |
353 | u8 proto; | |
4f518e80 FW |
354 | |
355 | const struct xfrm_type_offload *type_offload_esp; | |
356 | ||
357 | const struct xfrm_type *type_esp; | |
358 | const struct xfrm_type *type_ipip; | |
359 | const struct xfrm_type *type_ipip6; | |
360 | const struct xfrm_type *type_comp; | |
361 | const struct xfrm_type *type_ah; | |
362 | const struct xfrm_type *type_routing; | |
363 | const struct xfrm_type *type_dstopts; | |
9d389d7f | 364 | |
ede2059d | 365 | int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb); |
716062fd HX |
366 | int (*transport_finish)(struct sk_buff *skb, |
367 | int async); | |
628e341f | 368 | void (*local_error)(struct sk_buff *skb, u32 mtu); |
1da177e4 LT |
369 | }; |
370 | ||
d511337a JP |
371 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); |
372 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
373 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); | |
711059b9 | 374 | struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family); |
1da177e4 | 375 | |
2f32b51b | 376 | struct xfrm_input_afinfo { |
1475ee0a XL |
377 | u8 family; |
378 | bool is_ipip; | |
2f32b51b SK |
379 | int (*callback)(struct sk_buff *skb, u8 protocol, |
380 | int err); | |
381 | }; | |
382 | ||
960fdfde FW |
383 | int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo); |
384 | int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo); | |
2f32b51b | 385 | |
b48c05ab | 386 | void xfrm_flush_gc(void); |
d511337a | 387 | void xfrm_state_delete_tunnel(struct xfrm_state *x); |
1da177e4 | 388 | |
fd2c3ef7 | 389 | struct xfrm_type { |
1da177e4 LT |
390 | char *description; |
391 | struct module *owner; | |
a6337463 | 392 | u8 proto; |
393 | u8 flags; | |
1b5c2299 | 394 | #define XFRM_TYPE_NON_FRAGMENT 1 |
436a0a40 | 395 | #define XFRM_TYPE_REPLAY_PROT 2 |
f04e7e8d HX |
396 | #define XFRM_TYPE_LOCAL_COADDR 4 |
397 | #define XFRM_TYPE_REMOTE_COADDR 8 | |
1da177e4 | 398 | |
72cb6962 | 399 | int (*init_state)(struct xfrm_state *x); |
1da177e4 | 400 | void (*destructor)(struct xfrm_state *); |
e695633e | 401 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 402 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
8f029de2 DM |
403 | int (*reject)(struct xfrm_state *, struct sk_buff *, |
404 | const struct flowi *); | |
aee5adb4 | 405 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
1da177e4 LT |
406 | }; |
407 | ||
d511337a | 408 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
4f518e80 | 409 | void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); |
1da177e4 | 410 | |
9d389d7f SK |
411 | struct xfrm_type_offload { |
412 | char *description; | |
413 | struct module *owner; | |
414 | u8 proto; | |
415 | void (*encap)(struct xfrm_state *, struct sk_buff *pskb); | |
416 | int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb); | |
417 | int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features); | |
418 | }; | |
419 | ||
420 | int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family); | |
4f518e80 | 421 | void xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family); |
9d389d7f | 422 | |
df9dcb45 KM |
423 | static inline int xfrm_af2proto(unsigned int family) |
424 | { | |
425 | switch(family) { | |
426 | case AF_INET: | |
427 | return IPPROTO_IPIP; | |
428 | case AF_INET6: | |
429 | return IPPROTO_IPV6; | |
430 | default: | |
431 | return 0; | |
432 | } | |
433 | } | |
434 | ||
4c145dce | 435 | static inline const struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) |
df9dcb45 KM |
436 | { |
437 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || | |
438 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) | |
c9500d7b | 439 | return &x->inner_mode; |
df9dcb45 | 440 | else |
c9500d7b | 441 | return &x->inner_mode_iaf; |
df9dcb45 KM |
442 | } |
443 | ||
fd2c3ef7 | 444 | struct xfrm_tmpl { |
1da177e4 LT |
445 | /* id in template is interpreted as: |
446 | * daddr - destination of tunnel, may be zero for transport mode. | |
447 | * spi - zero to acquire spi. Not zero if spi is static, then | |
448 | * daddr must be fixed too. | |
449 | * proto - AH/ESP/IPCOMP | |
450 | */ | |
451 | struct xfrm_id id; | |
452 | ||
453 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
454 | xfrm_address_t saddr; | |
455 | ||
76b3f055 MK |
456 | unsigned short encap_family; |
457 | ||
a6337463 | 458 | u32 reqid; |
1da177e4 | 459 | |
7e49e6de | 460 | /* Mode: transport, tunnel etc. */ |
a6337463 | 461 | u8 mode; |
1da177e4 LT |
462 | |
463 | /* Sharing mode: unique, this session only, this user only etc. */ | |
a6337463 | 464 | u8 share; |
1da177e4 LT |
465 | |
466 | /* May skip this transfomration if no SA is found */ | |
a6337463 | 467 | u8 optional; |
1da177e4 | 468 | |
c5d18e98 | 469 | /* Skip aalgos/ealgos/calgos checks. */ |
a6337463 | 470 | u8 allalgs; |
c5d18e98 | 471 | |
1da177e4 | 472 | /* Bit mask of algos allowed for acquisition */ |
a6337463 | 473 | u32 aalgos; |
474 | u32 ealgos; | |
475 | u32 calgos; | |
1da177e4 LT |
476 | }; |
477 | ||
622dc828 | 478 | #define XFRM_MAX_DEPTH 6 |
54ef207a | 479 | #define XFRM_MAX_OFFLOAD_DEPTH 1 |
1da177e4 | 480 | |
12a169e7 HX |
481 | struct xfrm_policy_walk_entry { |
482 | struct list_head all; | |
483 | u8 dead; | |
484 | }; | |
485 | ||
486 | struct xfrm_policy_walk { | |
487 | struct xfrm_policy_walk_entry walk; | |
488 | u8 type; | |
489 | u32 seq; | |
490 | }; | |
491 | ||
a0073fe1 SK |
492 | struct xfrm_policy_queue { |
493 | struct sk_buff_head hold_queue; | |
494 | struct timer_list hold_timer; | |
495 | unsigned long timeout; | |
496 | }; | |
497 | ||
fd2c3ef7 | 498 | struct xfrm_policy { |
0c5c9fb5 | 499 | possible_net_t xp_net; |
2518c7c2 DM |
500 | struct hlist_node bydst; |
501 | struct hlist_node byidx; | |
1da177e4 LT |
502 | |
503 | /* This lock only affects elements except for entry. */ | |
504 | rwlock_t lock; | |
850a6212 | 505 | refcount_t refcnt; |
6be3b0db | 506 | u32 pos; |
1da177e4 LT |
507 | struct timer_list timer; |
508 | ||
80c802f3 | 509 | atomic_t genid; |
1da177e4 LT |
510 | u32 priority; |
511 | u32 index; | |
7e652640 | 512 | u32 if_id; |
bf825f81 | 513 | struct xfrm_mark mark; |
1da177e4 LT |
514 | struct xfrm_selector selector; |
515 | struct xfrm_lifetime_cfg lft; | |
516 | struct xfrm_lifetime_cur curlft; | |
12a169e7 | 517 | struct xfrm_policy_walk_entry walk; |
a0073fe1 | 518 | struct xfrm_policy_queue polq; |
9cf545eb | 519 | bool bydst_reinsert; |
46ca5f5d ACM |
520 | u8 type; |
521 | u8 action; | |
522 | u8 flags; | |
46ca5f5d | 523 | u8 xfrm_nr; |
12a169e7 | 524 | u16 family; |
df71837d | 525 | struct xfrm_sec_ctx *security; |
1da177e4 | 526 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
24969fac | 527 | struct hlist_node bydst_inexact_list; |
56f04730 | 528 | struct rcu_head rcu; |
1da177e4 LT |
529 | }; |
530 | ||
63eb23f5 | 531 | static inline struct net *xp_net(const struct xfrm_policy *xp) |
0331b1f3 AD |
532 | { |
533 | return read_pnet(&xp->xp_net); | |
534 | } | |
535 | ||
13c1d189 AE |
536 | struct xfrm_kmaddress { |
537 | xfrm_address_t local; | |
538 | xfrm_address_t remote; | |
539 | u32 reserved; | |
540 | u16 family; | |
541 | }; | |
542 | ||
80c9abaa SS |
543 | struct xfrm_migrate { |
544 | xfrm_address_t old_daddr; | |
545 | xfrm_address_t old_saddr; | |
546 | xfrm_address_t new_daddr; | |
547 | xfrm_address_t new_saddr; | |
548 | u8 proto; | |
549 | u8 mode; | |
550 | u16 reserved; | |
551 | u32 reqid; | |
552 | u16 old_family; | |
553 | u16 new_family; | |
554 | }; | |
555 | ||
f8cd5488 | 556 | #define XFRM_KM_TIMEOUT 30 |
f8cd5488 JHS |
557 | /* what happened */ |
558 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
559 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
560 | ||
561 | /* default aevent timeout in units of 100ms */ | |
562 | #define XFRM_AE_ETIME 10 | |
563 | /* Async Event timer multiplier */ | |
564 | #define XFRM_AE_ETH_M 10 | |
565 | /* default seq threshold size */ | |
566 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 | 567 | |
fd2c3ef7 | 568 | struct xfrm_mgr { |
1da177e4 | 569 | struct list_head list; |
214e005b | 570 | int (*notify)(struct xfrm_state *x, const struct km_event *c); |
65e0736b | 571 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); |
cb969f07 | 572 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 573 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
214e005b | 574 | int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); |
db983c11 | 575 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
183cad12 DM |
576 | int (*migrate)(const struct xfrm_selector *sel, |
577 | u8 dir, u8 type, | |
578 | const struct xfrm_migrate *m, | |
579 | int num_bundles, | |
8bafd730 AA |
580 | const struct xfrm_kmaddress *k, |
581 | const struct xfrm_encap_tmpl *encap); | |
0f24558e | 582 | bool (*is_alive)(const struct km_event *c); |
1da177e4 LT |
583 | }; |
584 | ||
d511337a JP |
585 | int xfrm_register_km(struct xfrm_mgr *km); |
586 | int xfrm_unregister_km(struct xfrm_mgr *km); | |
1da177e4 | 587 | |
70be6c91 SK |
588 | struct xfrm_tunnel_skb_cb { |
589 | union { | |
590 | struct inet_skb_parm h4; | |
591 | struct inet6_skb_parm h6; | |
592 | } header; | |
593 | ||
594 | union { | |
595 | struct ip_tunnel *ip4; | |
596 | struct ip6_tnl *ip6; | |
597 | } tunnel; | |
598 | }; | |
599 | ||
600 | #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) | |
601 | ||
436a0a40 HX |
602 | /* |
603 | * This structure is used for the duration where packets are being | |
604 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
605 | * area beyond the generic IP part may be overwritten. | |
606 | */ | |
607 | struct xfrm_skb_cb { | |
70be6c91 | 608 | struct xfrm_tunnel_skb_cb header; |
436a0a40 HX |
609 | |
610 | /* Sequence number for replay protection. */ | |
b318e0e4 | 611 | union { |
1ce3644a SK |
612 | struct { |
613 | __u32 low; | |
614 | __u32 hi; | |
615 | } output; | |
616 | struct { | |
617 | __be32 low; | |
618 | __be32 hi; | |
619 | } input; | |
b318e0e4 | 620 | } seq; |
436a0a40 HX |
621 | }; |
622 | ||
623 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
624 | ||
36cf9acf HX |
625 | /* |
626 | * This structure is used by the afinfo prepare_input/prepare_output functions | |
627 | * to transmit header information to the mode input/output functions. | |
628 | */ | |
629 | struct xfrm_mode_skb_cb { | |
70be6c91 | 630 | struct xfrm_tunnel_skb_cb header; |
36cf9acf HX |
631 | |
632 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
633 | __be16 id; | |
634 | __be16 frag_off; | |
635 | ||
732c8bd5 HX |
636 | /* IP header length (excluding options or extension headers). */ |
637 | u8 ihl; | |
638 | ||
36cf9acf HX |
639 | /* TOS for IPv4, class for IPv6. */ |
640 | u8 tos; | |
641 | ||
642 | /* TTL for IPv4, hop limitfor IPv6. */ | |
643 | u8 ttl; | |
644 | ||
645 | /* Protocol for IPv4, NH for IPv6. */ | |
646 | u8 protocol; | |
647 | ||
732c8bd5 HX |
648 | /* Option length for IPv4, zero for IPv6. */ |
649 | u8 optlen; | |
650 | ||
36cf9acf HX |
651 | /* Used by IPv6 only, zero for IPv4. */ |
652 | u8 flow_lbl[3]; | |
653 | }; | |
654 | ||
655 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
656 | ||
716062fd HX |
657 | /* |
658 | * This structure is used by the input processing to locate the SPI and | |
659 | * related information. | |
660 | */ | |
661 | struct xfrm_spi_skb_cb { | |
70be6c91 | 662 | struct xfrm_tunnel_skb_cb header; |
716062fd | 663 | |
716062fd | 664 | unsigned int daddroff; |
2fcb45b6 | 665 | unsigned int family; |
7785bba2 | 666 | __be32 seq; |
716062fd HX |
667 | }; |
668 | ||
669 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) | |
670 | ||
c9204d9c | 671 | #ifdef CONFIG_AUDITSYSCALL |
afeb14b4 | 672 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
ab5f5e8b JL |
673 | { |
674 | struct audit_buffer *audit_buf = NULL; | |
ab5f5e8b | 675 | |
f7859590 | 676 | if (audit_enabled == AUDIT_OFF) |
afeb14b4 | 677 | return NULL; |
cdfb6b34 | 678 | audit_buf = audit_log_start(audit_context(), GFP_ATOMIC, |
afeb14b4 | 679 | AUDIT_MAC_IPSEC_EVENT); |
ab5f5e8b JL |
680 | if (audit_buf == NULL) |
681 | return NULL; | |
afeb14b4 PM |
682 | audit_log_format(audit_buf, "op=%s", op); |
683 | return audit_buf; | |
684 | } | |
ab5f5e8b | 685 | |
2e71029e | 686 | static inline void xfrm_audit_helper_usrinfo(bool task_valid, |
afeb14b4 PM |
687 | struct audit_buffer *audit_buf) |
688 | { | |
2e71029e TH |
689 | const unsigned int auid = from_kuid(&init_user_ns, task_valid ? |
690 | audit_get_loginuid(current) : | |
691 | INVALID_UID); | |
692 | const unsigned int ses = task_valid ? audit_get_sessionid(current) : | |
f0b75216 | 693 | AUDIT_SID_UNSET; |
2e71029e TH |
694 | |
695 | audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); | |
f1370cc4 | 696 | audit_log_task_context(audit_buf); |
ab5f5e8b JL |
697 | } |
698 | ||
2e71029e TH |
699 | void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid); |
700 | void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
701 | bool task_valid); | |
702 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid); | |
703 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid); | |
d511337a JP |
704 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
705 | struct sk_buff *skb); | |
706 | void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, | |
707 | __be32 net_seq); | |
708 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); | |
709 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, | |
710 | __be32 net_seq); | |
711 | void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, | |
712 | u8 proto); | |
c9204d9c | 713 | #else |
41fef0ee MS |
714 | |
715 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
2e71029e | 716 | bool task_valid) |
41fef0ee MS |
717 | { |
718 | } | |
719 | ||
720 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
2e71029e | 721 | bool task_valid) |
41fef0ee MS |
722 | { |
723 | } | |
724 | ||
725 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
2e71029e | 726 | bool task_valid) |
41fef0ee MS |
727 | { |
728 | } | |
729 | ||
730 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
2e71029e | 731 | bool task_valid) |
41fef0ee MS |
732 | { |
733 | } | |
734 | ||
735 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
736 | struct sk_buff *skb) | |
737 | { | |
738 | } | |
739 | ||
9fdc4883 SK |
740 | static inline void xfrm_audit_state_replay(struct xfrm_state *x, |
741 | struct sk_buff *skb, __be32 net_seq) | |
742 | { | |
743 | } | |
744 | ||
41fef0ee MS |
745 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, |
746 | u16 family) | |
747 | { | |
748 | } | |
749 | ||
750 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
751 | __be32 net_spi, __be32 net_seq) | |
752 | { | |
753 | } | |
754 | ||
755 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
756 | struct sk_buff *skb, u8 proto) | |
757 | { | |
758 | } | |
c9204d9c | 759 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 760 | |
1da177e4 LT |
761 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
762 | { | |
763 | if (likely(policy != NULL)) | |
850a6212 | 764 | refcount_inc(&policy->refcnt); |
1da177e4 LT |
765 | } |
766 | ||
d511337a | 767 | void xfrm_policy_destroy(struct xfrm_policy *policy); |
1da177e4 LT |
768 | |
769 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
770 | { | |
850a6212 | 771 | if (refcount_dec_and_test(&policy->refcnt)) |
64c31b3f | 772 | xfrm_policy_destroy(policy); |
1da177e4 LT |
773 | } |
774 | ||
4e81bb83 MN |
775 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
776 | { | |
777 | int i; | |
778 | for (i = npols - 1; i >= 0; --i) | |
779 | xfrm_pol_put(pols[i]); | |
780 | } | |
4e81bb83 | 781 | |
f75a2804 | 782 | void __xfrm_state_destroy(struct xfrm_state *, bool); |
1da177e4 | 783 | |
21380b81 HX |
784 | static inline void __xfrm_state_put(struct xfrm_state *x) |
785 | { | |
88755e9c | 786 | refcount_dec(&x->refcnt); |
21380b81 HX |
787 | } |
788 | ||
1da177e4 LT |
789 | static inline void xfrm_state_put(struct xfrm_state *x) |
790 | { | |
88755e9c | 791 | if (refcount_dec_and_test(&x->refcnt)) |
f75a2804 CW |
792 | __xfrm_state_destroy(x, false); |
793 | } | |
794 | ||
795 | static inline void xfrm_state_put_sync(struct xfrm_state *x) | |
796 | { | |
797 | if (refcount_dec_and_test(&x->refcnt)) | |
798 | __xfrm_state_destroy(x, true); | |
1da177e4 LT |
799 | } |
800 | ||
801 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
802 | { | |
88755e9c | 803 | refcount_inc(&x->refcnt); |
1da177e4 LT |
804 | } |
805 | ||
1744a8fe | 806 | static inline bool addr_match(const void *token1, const void *token2, |
e1b0048e | 807 | unsigned int prefixlen) |
1da177e4 | 808 | { |
1744a8fe DM |
809 | const __be32 *a1 = token1; |
810 | const __be32 *a2 = token2; | |
e1b0048e AD |
811 | unsigned int pdw; |
812 | unsigned int pbi; | |
1da177e4 | 813 | |
a6337463 | 814 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
1da177e4 LT |
815 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
816 | ||
817 | if (pdw) | |
818 | if (memcmp(a1, a2, pdw << 2)) | |
1744a8fe | 819 | return false; |
1da177e4 LT |
820 | |
821 | if (pbi) { | |
5f19343f | 822 | __be32 mask; |
1da177e4 LT |
823 | |
824 | mask = htonl((0xffffffff) << (32 - pbi)); | |
825 | ||
826 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
1744a8fe | 827 | return false; |
1da177e4 LT |
828 | } |
829 | ||
1744a8fe | 830 | return true; |
1da177e4 LT |
831 | } |
832 | ||
26bff940 AD |
833 | static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) |
834 | { | |
835 | /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ | |
6c786bcb | 836 | if (sizeof(long) == 4 && prefixlen == 0) |
26bff940 | 837 | return true; |
6c786bcb | 838 | return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen))); |
26bff940 AD |
839 | } |
840 | ||
1da177e4 | 841 | static __inline__ |
6281dcc9 | 842 | __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 843 | { |
f9d07e41 | 844 | __be16 port; |
1d28f42c | 845 | switch(fl->flowi_proto) { |
1da177e4 LT |
846 | case IPPROTO_TCP: |
847 | case IPPROTO_UDP: | |
ba4e58ec | 848 | case IPPROTO_UDPLITE: |
1da177e4 | 849 | case IPPROTO_SCTP: |
6281dcc9 | 850 | port = uli->ports.sport; |
1da177e4 LT |
851 | break; |
852 | case IPPROTO_ICMP: | |
853 | case IPPROTO_ICMPV6: | |
6281dcc9 | 854 | port = htons(uli->icmpt.type); |
1da177e4 | 855 | break; |
2ce4272a | 856 | case IPPROTO_MH: |
6281dcc9 | 857 | port = htons(uli->mht.type); |
2ce4272a | 858 | break; |
cc9ff19d | 859 | case IPPROTO_GRE: |
6281dcc9 | 860 | port = htons(ntohl(uli->gre_key) >> 16); |
cc9ff19d | 861 | break; |
1da177e4 LT |
862 | default: |
863 | port = 0; /*XXX*/ | |
864 | } | |
865 | return port; | |
866 | } | |
867 | ||
868 | static __inline__ | |
6281dcc9 | 869 | __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 870 | { |
f9d07e41 | 871 | __be16 port; |
1d28f42c | 872 | switch(fl->flowi_proto) { |
1da177e4 LT |
873 | case IPPROTO_TCP: |
874 | case IPPROTO_UDP: | |
ba4e58ec | 875 | case IPPROTO_UDPLITE: |
1da177e4 | 876 | case IPPROTO_SCTP: |
6281dcc9 | 877 | port = uli->ports.dport; |
1da177e4 LT |
878 | break; |
879 | case IPPROTO_ICMP: | |
880 | case IPPROTO_ICMPV6: | |
6281dcc9 | 881 | port = htons(uli->icmpt.code); |
1da177e4 | 882 | break; |
cc9ff19d | 883 | case IPPROTO_GRE: |
6281dcc9 | 884 | port = htons(ntohl(uli->gre_key) & 0xffff); |
cc9ff19d | 885 | break; |
1da177e4 LT |
886 | default: |
887 | port = 0; /*XXX*/ | |
888 | } | |
889 | return port; | |
890 | } | |
891 | ||
d511337a JP |
892 | bool xfrm_selector_match(const struct xfrm_selector *sel, |
893 | const struct flowi *fl, unsigned short family); | |
1da177e4 | 894 | |
df71837d TJ |
895 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
896 | /* If neither has a context --> match | |
897 | * Otherwise, both must have a context and the sids, doi, alg must match | |
898 | */ | |
bc9b35ad | 899 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d TJ |
900 | { |
901 | return ((!s1 && !s2) || | |
902 | (s1 && s2 && | |
903 | (s1->ctx_sid == s2->ctx_sid) && | |
904 | (s1->ctx_doi == s2->ctx_doi) && | |
905 | (s1->ctx_alg == s2->ctx_alg))); | |
906 | } | |
907 | #else | |
bc9b35ad | 908 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d | 909 | { |
bc9b35ad | 910 | return true; |
df71837d TJ |
911 | } |
912 | #endif | |
913 | ||
1da177e4 LT |
914 | /* A struct encoding bundle of transformations to apply to some set of flow. |
915 | * | |
b6ca8bd5 | 916 | * xdst->child points to the next element of bundle. |
1da177e4 LT |
917 | * dst->xfrm points to an instanse of transformer. |
918 | * | |
919 | * Due to unfortunate limitations of current routing cache, which we | |
920 | * have no time to fix, it mirrors struct rtable and bound to the same | |
921 | * routing key, including saddr,daddr. However, we can have many of | |
922 | * bundles differing by session id. All the bundles grow from a parent | |
923 | * policy rule. | |
924 | */ | |
fd2c3ef7 | 925 | struct xfrm_dst { |
1da177e4 | 926 | union { |
1da177e4 LT |
927 | struct dst_entry dst; |
928 | struct rtable rt; | |
929 | struct rt6_info rt6; | |
930 | } u; | |
931 | struct dst_entry *route; | |
b6ca8bd5 | 932 | struct dst_entry *child; |
0f6c480f | 933 | struct dst_entry *path; |
80c802f3 TT |
934 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; |
935 | int num_pols, num_xfrms; | |
80c802f3 TT |
936 | u32 xfrm_genid; |
937 | u32 policy_genid; | |
1da177e4 LT |
938 | u32 route_mtu_cached; |
939 | u32 child_mtu_cached; | |
92d63dec HY |
940 | u32 route_cookie; |
941 | u32 path_cookie; | |
1da177e4 LT |
942 | }; |
943 | ||
0f6c480f DM |
944 | static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst) |
945 | { | |
946 | #ifdef CONFIG_XFRM | |
101dde42 | 947 | if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) { |
0f6c480f DM |
948 | const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst; |
949 | ||
950 | return xdst->path; | |
951 | } | |
952 | #endif | |
953 | return (struct dst_entry *) dst; | |
954 | } | |
955 | ||
b92cf4aa DM |
956 | static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst) |
957 | { | |
958 | #ifdef CONFIG_XFRM | |
101dde42 | 959 | if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) { |
b6ca8bd5 DM |
960 | struct xfrm_dst *xdst = (struct xfrm_dst *) dst; |
961 | return xdst->child; | |
962 | } | |
b92cf4aa DM |
963 | #endif |
964 | return NULL; | |
965 | } | |
966 | ||
def8b4fa | 967 | #ifdef CONFIG_XFRM |
45b018be DM |
968 | static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child) |
969 | { | |
b6ca8bd5 | 970 | xdst->child = child; |
45b018be DM |
971 | } |
972 | ||
aabc9761 HX |
973 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
974 | { | |
80c802f3 | 975 | xfrm_pols_put(xdst->pols, xdst->num_pols); |
aabc9761 HX |
976 | dst_release(xdst->route); |
977 | if (likely(xdst->u.dst.xfrm)) | |
978 | xfrm_state_put(xdst->u.dst.xfrm); | |
979 | } | |
def8b4fa | 980 | #endif |
aabc9761 | 981 | |
d511337a | 982 | void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); |
aabc9761 | 983 | |
f203b76d | 984 | struct xfrm_if_parms { |
f203b76d SK |
985 | int link; /* ifindex of underlying L2 interface */ |
986 | u32 if_id; /* interface identifyer */ | |
987 | }; | |
988 | ||
989 | struct xfrm_if { | |
990 | struct xfrm_if __rcu *next; /* next interface in list */ | |
991 | struct net_device *dev; /* virtual device associated with interface */ | |
f203b76d SK |
992 | struct net *net; /* netns for packet i/o */ |
993 | struct xfrm_if_parms p; /* interface parms */ | |
994 | ||
995 | struct gro_cells gro_cells; | |
996 | }; | |
997 | ||
54ef207a SK |
998 | struct xfrm_offload { |
999 | /* Output sequence number for replay protection on offloading. */ | |
1000 | struct { | |
1001 | __u32 low; | |
1002 | __u32 hi; | |
1003 | } seq; | |
1004 | ||
1005 | __u32 flags; | |
1006 | #define SA_DELETE_REQ 1 | |
1007 | #define CRYPTO_DONE 2 | |
1008 | #define CRYPTO_NEXT_DONE 4 | |
1009 | #define CRYPTO_FALLBACK 8 | |
1010 | #define XFRM_GSO_SEGMENT 16 | |
1011 | #define XFRM_GRO 32 | |
47ebcc0b | 1012 | #define XFRM_ESP_NO_TRAILER 64 |
f53c7239 | 1013 | #define XFRM_DEV_RESUME 128 |
94579ac3 | 1014 | #define XFRM_XMIT 256 |
54ef207a SK |
1015 | |
1016 | __u32 status; | |
1017 | #define CRYPTO_SUCCESS 1 | |
1018 | #define CRYPTO_GENERIC_ERROR 2 | |
1019 | #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4 | |
1020 | #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8 | |
1021 | #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16 | |
1022 | #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32 | |
1023 | #define CRYPTO_INVALID_PACKET_SYNTAX 64 | |
1024 | #define CRYPTO_INVALID_PROTOCOL 128 | |
1025 | ||
1026 | __u8 proto; | |
1027 | }; | |
1028 | ||
fd2c3ef7 | 1029 | struct sec_path { |
1da177e4 | 1030 | int len; |
54ef207a SK |
1031 | int olen; |
1032 | ||
dbe5b4aa | 1033 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
54ef207a | 1034 | struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH]; |
1da177e4 LT |
1035 | }; |
1036 | ||
0ca64da1 | 1037 | struct sec_path *secpath_set(struct sk_buff *skb); |
1da177e4 LT |
1038 | |
1039 | static inline void | |
1040 | secpath_reset(struct sk_buff *skb) | |
1041 | { | |
1042 | #ifdef CONFIG_XFRM | |
4165079b | 1043 | skb_ext_del(skb, SKB_EXT_SEC_PATH); |
1da177e4 LT |
1044 | #endif |
1045 | } | |
1046 | ||
a1e59abf | 1047 | static inline int |
6cc32961 | 1048 | xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) |
a1e59abf PM |
1049 | { |
1050 | switch (family) { | |
1051 | case AF_INET: | |
1052 | return addr->a4 == 0; | |
1053 | case AF_INET6: | |
15e318bd | 1054 | return ipv6_addr_any(&addr->in6); |
a1e59abf PM |
1055 | } |
1056 | return 0; | |
1057 | } | |
1058 | ||
1da177e4 | 1059 | static inline int |
21eddb5c | 1060 | __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1061 | { |
1062 | return (tmpl->saddr.a4 && | |
1063 | tmpl->saddr.a4 != x->props.saddr.a4); | |
1064 | } | |
1065 | ||
1066 | static inline int | |
21eddb5c | 1067 | __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1068 | { |
1069 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
ff88b30c | 1070 | !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); |
1da177e4 LT |
1071 | } |
1072 | ||
1073 | static inline int | |
21eddb5c | 1074 | xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) |
1da177e4 LT |
1075 | { |
1076 | switch (family) { | |
1077 | case AF_INET: | |
1078 | return __xfrm4_state_addr_cmp(tmpl, x); | |
1079 | case AF_INET6: | |
1080 | return __xfrm6_state_addr_cmp(tmpl, x); | |
1081 | } | |
1082 | return !0; | |
1083 | } | |
1084 | ||
1085 | #ifdef CONFIG_XFRM | |
d511337a JP |
1086 | int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, |
1087 | unsigned short family); | |
1da177e4 | 1088 | |
d5422efe HX |
1089 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
1090 | struct sk_buff *skb, | |
1091 | unsigned int family, int reverse) | |
1da177e4 | 1092 | { |
f6e1e25d | 1093 | struct net *net = dev_net(skb->dev); |
d5422efe HX |
1094 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
1095 | ||
1da177e4 | 1096 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
d5422efe | 1097 | return __xfrm_policy_check(sk, ndir, skb, family); |
4e81bb83 | 1098 | |
26912e37 | 1099 | return (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) || |
adf30907 | 1100 | (skb_dst(skb)->flags & DST_NOPOLICY) || |
d5422efe HX |
1101 | __xfrm_policy_check(sk, ndir, skb, family); |
1102 | } | |
1103 | ||
1104 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1105 | { | |
1106 | return __xfrm_policy_check2(sk, dir, skb, family, 0); | |
1da177e4 LT |
1107 | } |
1108 | ||
1109 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1110 | { | |
1111 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
1112 | } | |
1113 | ||
1114 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1115 | { | |
1116 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
1117 | } | |
1118 | ||
d5422efe HX |
1119 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1120 | struct sk_buff *skb) | |
1121 | { | |
1122 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); | |
1123 | } | |
1124 | ||
1125 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1126 | struct sk_buff *skb) | |
1127 | { | |
1128 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); | |
1129 | } | |
1130 | ||
d511337a JP |
1131 | int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, |
1132 | unsigned int family, int reverse); | |
d5422efe HX |
1133 | |
1134 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1135 | unsigned int family) | |
1136 | { | |
1137 | return __xfrm_decode_session(skb, fl, family, 0); | |
1138 | } | |
1139 | ||
1140 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, | |
1141 | struct flowi *fl, | |
1142 | unsigned int family) | |
1143 | { | |
1144 | return __xfrm_decode_session(skb, fl, family, 1); | |
1145 | } | |
1146 | ||
d511337a | 1147 | int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
1da177e4 LT |
1148 | |
1149 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
1150 | { | |
99a66657 AD |
1151 | struct net *net = dev_net(skb->dev); |
1152 | ||
1153 | return !net->xfrm.policy_count[XFRM_POLICY_OUT] || | |
adf30907 | 1154 | (skb_dst(skb)->flags & DST_NOXFRM) || |
1da177e4 LT |
1155 | __xfrm_route_forward(skb, family); |
1156 | } | |
1157 | ||
1158 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
1159 | { | |
1160 | return xfrm_route_forward(skb, AF_INET); | |
1161 | } | |
1162 | ||
1163 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
1164 | { | |
1165 | return xfrm_route_forward(skb, AF_INET6); | |
1166 | } | |
1167 | ||
d188ba86 | 1168 | int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk); |
1da177e4 | 1169 | |
d188ba86 | 1170 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) |
1da177e4 | 1171 | { |
d188ba86 ED |
1172 | sk->sk_policy[0] = NULL; |
1173 | sk->sk_policy[1] = NULL; | |
1174 | if (unlikely(osk->sk_policy[0] || osk->sk_policy[1])) | |
1175 | return __xfrm_sk_clone_policy(sk, osk); | |
1da177e4 LT |
1176 | return 0; |
1177 | } | |
1178 | ||
d511337a | 1179 | int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
1180 | |
1181 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
1182 | { | |
d188ba86 ED |
1183 | struct xfrm_policy *pol; |
1184 | ||
1185 | pol = rcu_dereference_protected(sk->sk_policy[0], 1); | |
1186 | if (unlikely(pol != NULL)) { | |
1187 | xfrm_policy_delete(pol, XFRM_POLICY_MAX); | |
1da177e4 LT |
1188 | sk->sk_policy[0] = NULL; |
1189 | } | |
d188ba86 ED |
1190 | pol = rcu_dereference_protected(sk->sk_policy[1], 1); |
1191 | if (unlikely(pol != NULL)) { | |
1192 | xfrm_policy_delete(pol, XFRM_POLICY_MAX+1); | |
1da177e4 LT |
1193 | sk->sk_policy[1] = NULL; |
1194 | } | |
1195 | } | |
1196 | ||
1197 | #else | |
1198 | ||
1199 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
d188ba86 | 1200 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; } |
82695b30 SH |
1201 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } |
1202 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
1da177e4 | 1203 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
82695b30 SH |
1204 | { |
1205 | return 1; | |
1206 | } | |
1da177e4 LT |
1207 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
1208 | { | |
1209 | return 1; | |
1210 | } | |
1211 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1212 | { | |
1213 | return 1; | |
1214 | } | |
d5422efe HX |
1215 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
1216 | struct flowi *fl, | |
1217 | unsigned int family) | |
1218 | { | |
1219 | return -ENOSYS; | |
1220 | } | |
1221 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, | |
1222 | struct sk_buff *skb) | |
1223 | { | |
1224 | return 1; | |
1225 | } | |
1226 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1227 | struct sk_buff *skb) | |
1228 | { | |
1229 | return 1; | |
1230 | } | |
1da177e4 LT |
1231 | #endif |
1232 | ||
1233 | static __inline__ | |
e8a4e377 | 1234 | xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1235 | { |
1236 | switch (family){ | |
1237 | case AF_INET: | |
7e1dc7b6 | 1238 | return (xfrm_address_t *)&fl->u.ip4.daddr; |
1da177e4 | 1239 | case AF_INET6: |
7e1dc7b6 | 1240 | return (xfrm_address_t *)&fl->u.ip6.daddr; |
1da177e4 LT |
1241 | } |
1242 | return NULL; | |
1243 | } | |
1244 | ||
1245 | static __inline__ | |
e8a4e377 | 1246 | xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1247 | { |
1248 | switch (family){ | |
1249 | case AF_INET: | |
7e1dc7b6 | 1250 | return (xfrm_address_t *)&fl->u.ip4.saddr; |
1da177e4 | 1251 | case AF_INET6: |
7e1dc7b6 | 1252 | return (xfrm_address_t *)&fl->u.ip6.saddr; |
1da177e4 LT |
1253 | } |
1254 | return NULL; | |
1255 | } | |
1256 | ||
9bb182a7 | 1257 | static __inline__ |
e8a4e377 | 1258 | void xfrm_flowi_addr_get(const struct flowi *fl, |
9bb182a7 YH |
1259 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
1260 | unsigned short family) | |
1261 | { | |
1262 | switch(family) { | |
1263 | case AF_INET: | |
7e1dc7b6 DM |
1264 | memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); |
1265 | memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); | |
9bb182a7 YH |
1266 | break; |
1267 | case AF_INET6: | |
15e318bd JB |
1268 | saddr->in6 = fl->u.ip6.saddr; |
1269 | daddr->in6 = fl->u.ip6.daddr; | |
9bb182a7 YH |
1270 | break; |
1271 | } | |
1272 | } | |
1273 | ||
1da177e4 | 1274 | static __inline__ int |
f8848067 DM |
1275 | __xfrm4_state_addr_check(const struct xfrm_state *x, |
1276 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 LT |
1277 | { |
1278 | if (daddr->a4 == x->id.daddr.a4 && | |
1279 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
1280 | return 1; | |
1281 | return 0; | |
1282 | } | |
1283 | ||
1284 | static __inline__ int | |
f8848067 DM |
1285 | __xfrm6_state_addr_check(const struct xfrm_state *x, |
1286 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 | 1287 | { |
ff88b30c YH |
1288 | if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && |
1289 | (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || | |
82695b30 | 1290 | ipv6_addr_any((struct in6_addr *)saddr) || |
1da177e4 LT |
1291 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) |
1292 | return 1; | |
1293 | return 0; | |
1294 | } | |
1295 | ||
1296 | static __inline__ int | |
f8848067 DM |
1297 | xfrm_state_addr_check(const struct xfrm_state *x, |
1298 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, | |
1da177e4 LT |
1299 | unsigned short family) |
1300 | { | |
1301 | switch (family) { | |
1302 | case AF_INET: | |
1303 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
1304 | case AF_INET6: | |
1305 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
1306 | } | |
1307 | return 0; | |
1308 | } | |
1309 | ||
e53820de | 1310 | static __inline__ int |
f8848067 | 1311 | xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, |
e53820de MN |
1312 | unsigned short family) |
1313 | { | |
1314 | switch (family) { | |
1315 | case AF_INET: | |
1316 | return __xfrm4_state_addr_check(x, | |
7e1dc7b6 DM |
1317 | (const xfrm_address_t *)&fl->u.ip4.daddr, |
1318 | (const xfrm_address_t *)&fl->u.ip4.saddr); | |
e53820de MN |
1319 | case AF_INET6: |
1320 | return __xfrm6_state_addr_check(x, | |
7e1dc7b6 DM |
1321 | (const xfrm_address_t *)&fl->u.ip6.daddr, |
1322 | (const xfrm_address_t *)&fl->u.ip6.saddr); | |
e53820de MN |
1323 | } |
1324 | return 0; | |
1325 | } | |
1326 | ||
f8848067 | 1327 | static inline int xfrm_state_kern(const struct xfrm_state *x) |
1da177e4 LT |
1328 | { |
1329 | return atomic_read(&x->tunnel_users); | |
1330 | } | |
1331 | ||
dbb2483b CW |
1332 | static inline bool xfrm_id_proto_valid(u8 proto) |
1333 | { | |
1334 | switch (proto) { | |
1335 | case IPPROTO_AH: | |
1336 | case IPPROTO_ESP: | |
1337 | case IPPROTO_COMP: | |
1338 | #if IS_ENABLED(CONFIG_IPV6) | |
1339 | case IPPROTO_ROUTING: | |
1340 | case IPPROTO_DSTOPTS: | |
1341 | #endif | |
1342 | return true; | |
1343 | default: | |
1344 | return false; | |
1345 | } | |
1346 | } | |
1347 | ||
1348 | /* IPSEC_PROTO_ANY only matches 3 IPsec protocols, 0 could match all. */ | |
5794708f MN |
1349 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1350 | { | |
dc00a525 MN |
1351 | return (!userproto || proto == userproto || |
1352 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
1353 | proto == IPPROTO_ESP || | |
1354 | proto == IPPROTO_COMP))); | |
5794708f MN |
1355 | } |
1356 | ||
1da177e4 LT |
1357 | /* |
1358 | * xfrm algorithm information | |
1359 | */ | |
1a6509d9 | 1360 | struct xfrm_algo_aead_info { |
165ecc63 | 1361 | char *geniv; |
1a6509d9 HX |
1362 | u16 icv_truncbits; |
1363 | }; | |
1364 | ||
1da177e4 LT |
1365 | struct xfrm_algo_auth_info { |
1366 | u16 icv_truncbits; | |
1367 | u16 icv_fullbits; | |
1368 | }; | |
1369 | ||
1370 | struct xfrm_algo_encr_info { | |
165ecc63 | 1371 | char *geniv; |
1da177e4 LT |
1372 | u16 blockbits; |
1373 | u16 defkeybits; | |
1374 | }; | |
1375 | ||
1376 | struct xfrm_algo_comp_info { | |
1377 | u16 threshold; | |
1378 | }; | |
1379 | ||
1380 | struct xfrm_algo_desc { | |
1381 | char *name; | |
04ff1260 | 1382 | char *compat; |
1da177e4 | 1383 | u8 available:1; |
7e50f84c | 1384 | u8 pfkey_supported:1; |
1da177e4 | 1385 | union { |
1a6509d9 | 1386 | struct xfrm_algo_aead_info aead; |
1da177e4 LT |
1387 | struct xfrm_algo_auth_info auth; |
1388 | struct xfrm_algo_encr_info encr; | |
1389 | struct xfrm_algo_comp_info comp; | |
1390 | } uinfo; | |
1391 | struct sadb_alg desc; | |
1392 | }; | |
1393 | ||
3328715e SK |
1394 | /* XFRM protocol handlers. */ |
1395 | struct xfrm4_protocol { | |
1396 | int (*handler)(struct sk_buff *skb); | |
1397 | int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1398 | int encap_type); | |
1399 | int (*cb_handler)(struct sk_buff *skb, int err); | |
1400 | int (*err_handler)(struct sk_buff *skb, u32 info); | |
1401 | ||
1402 | struct xfrm4_protocol __rcu *next; | |
1403 | int priority; | |
1404 | }; | |
1405 | ||
7e14ea15 | 1406 | struct xfrm6_protocol { |
1da177e4 | 1407 | int (*handler)(struct sk_buff *skb); |
0146dca7 SD |
1408 | int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, |
1409 | int encap_type); | |
7e14ea15 SK |
1410 | int (*cb_handler)(struct sk_buff *skb, int err); |
1411 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
1412 | u8 type, u8 code, int offset, __be32 info); | |
d2acc347 | 1413 | |
7e14ea15 | 1414 | struct xfrm6_protocol __rcu *next; |
d2acc347 | 1415 | int priority; |
1da177e4 LT |
1416 | }; |
1417 | ||
1da177e4 LT |
1418 | /* XFRM tunnel handlers. */ |
1419 | struct xfrm_tunnel { | |
aba82695 | 1420 | int (*handler)(struct sk_buff *skb); |
6df2db5d | 1421 | int (*cb_handler)(struct sk_buff *skb, int err); |
a6337463 | 1422 | int (*err_handler)(struct sk_buff *skb, u32 info); |
d2acc347 | 1423 | |
b33eab08 | 1424 | struct xfrm_tunnel __rcu *next; |
aba82695 FD |
1425 | int priority; |
1426 | }; | |
1427 | ||
1da177e4 | 1428 | struct xfrm6_tunnel { |
d2acc347 | 1429 | int (*handler)(struct sk_buff *skb); |
86afc703 | 1430 | int (*cb_handler)(struct sk_buff *skb, int err); |
d2acc347 | 1431 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, |
d5fdd6ba | 1432 | u8 type, u8 code, int offset, __be32 info); |
6f0bcf15 | 1433 | struct xfrm6_tunnel __rcu *next; |
d2acc347 | 1434 | int priority; |
1da177e4 LT |
1435 | }; |
1436 | ||
d511337a JP |
1437 | void xfrm_init(void); |
1438 | void xfrm4_init(void); | |
1439 | int xfrm_state_init(struct net *net); | |
1440 | void xfrm_state_fini(struct net *net); | |
1441 | void xfrm4_state_init(void); | |
2f32b51b | 1442 | void xfrm4_protocol_init(void); |
c35b7e72 | 1443 | #ifdef CONFIG_XFRM |
d511337a JP |
1444 | int xfrm6_init(void); |
1445 | void xfrm6_fini(void); | |
1446 | int xfrm6_state_init(void); | |
1447 | void xfrm6_state_fini(void); | |
7e14ea15 SK |
1448 | int xfrm6_protocol_init(void); |
1449 | void xfrm6_protocol_fini(void); | |
c35b7e72 DL |
1450 | #else |
1451 | static inline int xfrm6_init(void) | |
1452 | { | |
1453 | return 0; | |
1454 | } | |
1455 | static inline void xfrm6_fini(void) | |
1456 | { | |
1457 | ; | |
1458 | } | |
1459 | #endif | |
1da177e4 | 1460 | |
558f82ef | 1461 | #ifdef CONFIG_XFRM_STATISTICS |
d511337a JP |
1462 | int xfrm_proc_init(struct net *net); |
1463 | void xfrm_proc_fini(struct net *net); | |
558f82ef MN |
1464 | #endif |
1465 | ||
d511337a | 1466 | int xfrm_sysctl_init(struct net *net); |
b27aeadb | 1467 | #ifdef CONFIG_SYSCTL |
d511337a | 1468 | void xfrm_sysctl_fini(struct net *net); |
b27aeadb AD |
1469 | #else |
1470 | static inline void xfrm_sysctl_fini(struct net *net) | |
1471 | { | |
1472 | } | |
1473 | #endif | |
1474 | ||
d3623099 | 1475 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
870a2df4 | 1476 | struct xfrm_address_filter *filter); |
d511337a JP |
1477 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
1478 | int (*func)(struct xfrm_state *, int, void*), void *); | |
283bc9f3 | 1479 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); |
d511337a | 1480 | struct xfrm_state *xfrm_state_alloc(struct net *net); |
4a135e53 | 1481 | void xfrm_state_free(struct xfrm_state *x); |
d511337a JP |
1482 | struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, |
1483 | const xfrm_address_t *saddr, | |
1484 | const struct flowi *fl, | |
1485 | struct xfrm_tmpl *tmpl, | |
1486 | struct xfrm_policy *pol, int *err, | |
bc56b334 | 1487 | unsigned short family, u32 if_id); |
7e652640 | 1488 | struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id, |
d511337a JP |
1489 | xfrm_address_t *daddr, |
1490 | xfrm_address_t *saddr, | |
1491 | unsigned short family, | |
1492 | u8 mode, u8 proto, u32 reqid); | |
c454997e FD |
1493 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
1494 | unsigned short family); | |
d511337a JP |
1495 | int xfrm_state_check_expire(struct xfrm_state *x); |
1496 | void xfrm_state_insert(struct xfrm_state *x); | |
1497 | int xfrm_state_add(struct xfrm_state *x); | |
1498 | int xfrm_state_update(struct xfrm_state *x); | |
1499 | struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, | |
1500 | const xfrm_address_t *daddr, __be32 spi, | |
1501 | u8 proto, unsigned short family); | |
1502 | struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, | |
1503 | const xfrm_address_t *daddr, | |
1504 | const xfrm_address_t *saddr, | |
1505 | u8 proto, | |
1506 | unsigned short family); | |
41a49cc3 | 1507 | #ifdef CONFIG_XFRM_SUB_POLICY |
3aaf3915 | 1508 | void xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, |
d511337a | 1509 | unsigned short family); |
3aaf3915 FW |
1510 | void xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, |
1511 | unsigned short family); | |
41a49cc3 | 1512 | #else |
3aaf3915 FW |
1513 | static inline void xfrm_tmpl_sort(struct xfrm_tmpl **d, struct xfrm_tmpl **s, |
1514 | int n, unsigned short family) | |
41a49cc3 | 1515 | { |
41a49cc3 MN |
1516 | } |
1517 | ||
3aaf3915 FW |
1518 | static inline void xfrm_state_sort(struct xfrm_state **d, struct xfrm_state **s, |
1519 | int n, unsigned short family) | |
41a49cc3 | 1520 | { |
41a49cc3 MN |
1521 | } |
1522 | #endif | |
af11e316 JHS |
1523 | |
1524 | struct xfrmk_sadinfo { | |
1525 | u32 sadhcnt; /* current hash bkts */ | |
1526 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1527 | u32 sadcnt; /* current running count */ | |
1528 | }; | |
1529 | ||
5a6d3416 JHS |
1530 | struct xfrmk_spdinfo { |
1531 | u32 incnt; | |
1532 | u32 outcnt; | |
1533 | u32 fwdcnt; | |
1534 | u32 inscnt; | |
1535 | u32 outscnt; | |
1536 | u32 fwdscnt; | |
1537 | u32 spdhcnt; | |
1538 | u32 spdhmcnt; | |
1539 | }; | |
1540 | ||
d511337a JP |
1541 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1542 | int xfrm_state_delete(struct xfrm_state *x); | |
f75a2804 | 1543 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync); |
d77e38e6 | 1544 | int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid); |
d511337a JP |
1545 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); |
1546 | void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); | |
1547 | u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); | |
1548 | int xfrm_init_replay(struct xfrm_state *x); | |
c7b37c76 | 1549 | u32 xfrm_state_mtu(struct xfrm_state *x, int mtu); |
ffdb5211 | 1550 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload); |
d511337a | 1551 | int xfrm_init_state(struct xfrm_state *x); |
d511337a JP |
1552 | int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); |
1553 | int xfrm_input_resume(struct sk_buff *skb, int nexthdr); | |
7b380192 SD |
1554 | int xfrm_trans_queue_net(struct net *net, struct sk_buff *skb, |
1555 | int (*finish)(struct net *, struct sock *, | |
1556 | struct sk_buff *)); | |
acf568ee HX |
1557 | int xfrm_trans_queue(struct sk_buff *skb, |
1558 | int (*finish)(struct net *, struct sock *, | |
1559 | struct sk_buff *)); | |
d511337a | 1560 | int xfrm_output_resume(struct sk_buff *skb, int err); |
7026b1dd | 1561 | int xfrm_output(struct sock *sk, struct sk_buff *skb); |
0c620e97 FW |
1562 | |
1563 | #if IS_ENABLED(CONFIG_NET_PKTGEN) | |
1564 | int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb); | |
1565 | #endif | |
1566 | ||
d511337a | 1567 | void xfrm_local_error(struct sk_buff *skb, int mtu); |
d511337a JP |
1568 | int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
1569 | int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1570 | int encap_type); | |
1571 | int xfrm4_transport_finish(struct sk_buff *skb, int async); | |
1572 | int xfrm4_rcv(struct sk_buff *skb); | |
1e295370 | 1573 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); |
c4541b41 HX |
1574 | |
1575 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1576 | { | |
70be6c91 | 1577 | XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; |
3328715e SK |
1578 | XFRM_SPI_SKB_CB(skb)->family = AF_INET; |
1579 | XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); | |
1580 | return xfrm_input(skb, nexthdr, spi, 0); | |
c4541b41 HX |
1581 | } |
1582 | ||
ede2059d | 1583 | int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
7026b1dd | 1584 | int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb); |
3328715e SK |
1585 | int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); |
1586 | int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol); | |
d511337a JP |
1587 | int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1588 | int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
d511337a | 1589 | void xfrm4_local_error(struct sk_buff *skb, u32 mtu); |
d511337a | 1590 | int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
63c43787 ND |
1591 | int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi, |
1592 | struct ip6_tnl *t); | |
0146dca7 SD |
1593 | int xfrm6_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
1594 | int encap_type); | |
d511337a | 1595 | int xfrm6_transport_finish(struct sk_buff *skb, int async); |
63c43787 | 1596 | int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t); |
d511337a JP |
1597 | int xfrm6_rcv(struct sk_buff *skb); |
1598 | int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, | |
1599 | xfrm_address_t *saddr, u8 proto); | |
7b77d161 | 1600 | void xfrm6_local_error(struct sk_buff *skb, u32 mtu); |
7e14ea15 SK |
1601 | int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol); |
1602 | int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol); | |
d511337a | 1603 | int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
7b77d161 | 1604 | int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); |
d511337a JP |
1605 | __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
1606 | __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); | |
ede2059d | 1607 | int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
7026b1dd | 1608 | int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb); |
d511337a JP |
1609 | int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
1610 | u8 **prevhdr); | |
1da177e4 LT |
1611 | |
1612 | #ifdef CONFIG_XFRM | |
3e50ddd8 | 1613 | void xfrm6_local_rxpmtu(struct sk_buff *skb, u32 mtu); |
d511337a | 1614 | int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
0146dca7 | 1615 | int xfrm6_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
c6d1b26a CH |
1616 | int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval, |
1617 | int optlen); | |
1da177e4 | 1618 | #else |
c6d1b26a CH |
1619 | static inline int xfrm_user_policy(struct sock *sk, int optname, |
1620 | sockptr_t optval, int optlen) | |
1da177e4 LT |
1621 | { |
1622 | return -ENOPROTOOPT; | |
82695b30 | 1623 | } |
1da177e4 LT |
1624 | #endif |
1625 | ||
d77e38e6 SK |
1626 | struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif, |
1627 | const xfrm_address_t *saddr, | |
1628 | const xfrm_address_t *daddr, | |
077fbac4 | 1629 | int family, u32 mark); |
d77e38e6 | 1630 | |
0331b1f3 | 1631 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
4c563f76 | 1632 | |
d511337a JP |
1633 | void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
1634 | int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, | |
1635 | int (*func)(struct xfrm_policy *, int, int, void*), | |
1636 | void *); | |
283bc9f3 | 1637 | void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); |
1da177e4 | 1638 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
4f47e8ab XL |
1639 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, |
1640 | const struct xfrm_mark *mark, | |
1641 | u32 if_id, u8 type, int dir, | |
4e81bb83 | 1642 | struct xfrm_selector *sel, |
ef41aaa0 EP |
1643 | struct xfrm_sec_ctx *ctx, int delete, |
1644 | int *err); | |
4f47e8ab XL |
1645 | struct xfrm_policy *xfrm_policy_byid(struct net *net, |
1646 | const struct xfrm_mark *mark, u32 if_id, | |
1647 | u8 type, int dir, u32 id, int delete, | |
1648 | int *err); | |
2e71029e | 1649 | int xfrm_policy_flush(struct net *net, u8 type, bool task_valid); |
880a6fab | 1650 | void xfrm_policy_hash_rebuild(struct net *net); |
1da177e4 | 1651 | u32 xfrm_get_acqseq(void); |
776e9dd9 | 1652 | int verify_spi_info(u8 proto, u32 min, u32 max); |
d511337a | 1653 | int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
e473fcb4 | 1654 | struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, |
7e652640 | 1655 | u8 mode, u32 reqid, u32 if_id, u8 proto, |
a70486f0 DM |
1656 | const xfrm_address_t *daddr, |
1657 | const xfrm_address_t *saddr, int create, | |
bd55775c | 1658 | unsigned short family); |
d511337a | 1659 | int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
1da177e4 | 1660 | |
80c9abaa | 1661 | #ifdef CONFIG_XFRM_MIGRATE |
d511337a JP |
1662 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1663 | const struct xfrm_migrate *m, int num_bundles, | |
8bafd730 AA |
1664 | const struct xfrm_kmaddress *k, |
1665 | const struct xfrm_encap_tmpl *encap); | |
283bc9f3 | 1666 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net); |
d511337a | 1667 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
4ab47d47 AA |
1668 | struct xfrm_migrate *m, |
1669 | struct xfrm_encap_tmpl *encap); | |
d511337a JP |
1670 | int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1671 | struct xfrm_migrate *m, int num_bundles, | |
4ab47d47 AA |
1672 | struct xfrm_kmaddress *k, struct net *net, |
1673 | struct xfrm_encap_tmpl *encap); | |
80c9abaa SS |
1674 | #endif |
1675 | ||
d511337a JP |
1676 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
1677 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); | |
1678 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, | |
1679 | xfrm_address_t *addr); | |
1680 | ||
1681 | void xfrm_input_init(void); | |
1682 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); | |
1683 | ||
1684 | void xfrm_probe_algs(void); | |
1685 | int xfrm_count_pfkey_auth_supported(void); | |
1686 | int xfrm_count_pfkey_enc_supported(void); | |
1687 | struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1688 | struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1689 | struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1690 | struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1691 | struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1692 | struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); | |
1693 | struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); | |
1694 | struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); | |
1695 | struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, | |
1696 | int probe); | |
1da177e4 | 1697 | |
70e94e66 YH |
1698 | static inline bool xfrm6_addr_equal(const xfrm_address_t *a, |
1699 | const xfrm_address_t *b) | |
1700 | { | |
1701 | return ipv6_addr_equal((const struct in6_addr *)a, | |
1702 | (const struct in6_addr *)b); | |
1703 | } | |
1704 | ||
1705 | static inline bool xfrm_addr_equal(const xfrm_address_t *a, | |
1706 | const xfrm_address_t *b, | |
1707 | sa_family_t family) | |
1da177e4 LT |
1708 | { |
1709 | switch (family) { | |
1710 | default: | |
1711 | case AF_INET: | |
70e94e66 | 1712 | return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; |
1da177e4 | 1713 | case AF_INET6: |
70e94e66 | 1714 | return xfrm6_addr_equal(a, b); |
1da177e4 LT |
1715 | } |
1716 | } | |
1717 | ||
77d8d7a6 HX |
1718 | static inline int xfrm_policy_id2dir(u32 index) |
1719 | { | |
1720 | return index & 7; | |
1721 | } | |
1722 | ||
a6483b79 AD |
1723 | #ifdef CONFIG_XFRM |
1724 | static inline int xfrm_aevent_is_on(struct net *net) | |
f8cd5488 | 1725 | { |
be33690d PM |
1726 | struct sock *nlsk; |
1727 | int ret = 0; | |
1728 | ||
1729 | rcu_read_lock(); | |
a6483b79 | 1730 | nlsk = rcu_dereference(net->xfrm.nlsk); |
be33690d PM |
1731 | if (nlsk) |
1732 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1733 | rcu_read_unlock(); | |
1734 | return ret; | |
f8cd5488 | 1735 | } |
0f24558e HG |
1736 | |
1737 | static inline int xfrm_acquire_is_on(struct net *net) | |
1738 | { | |
1739 | struct sock *nlsk; | |
1740 | int ret = 0; | |
1741 | ||
1742 | rcu_read_lock(); | |
1743 | nlsk = rcu_dereference(net->xfrm.nlsk); | |
1744 | if (nlsk) | |
1745 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE); | |
1746 | rcu_read_unlock(); | |
1747 | ||
1748 | return ret; | |
1749 | } | |
a6483b79 | 1750 | #endif |
f8cd5488 | 1751 | |
373b8eeb | 1752 | static inline unsigned int aead_len(struct xfrm_algo_aead *alg) |
ee5c2317 SK |
1753 | { |
1754 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1755 | } | |
1756 | ||
06cd22f8 | 1757 | static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg) |
0f99be0d ED |
1758 | { |
1759 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1760 | } | |
1761 | ||
1bd963a7 | 1762 | static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) |
4447bb33 MW |
1763 | { |
1764 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1765 | } | |
1766 | ||
5e708e47 | 1767 | static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) |
9736acf3 SK |
1768 | { |
1769 | return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); | |
1770 | } | |
1771 | ||
80c9abaa | 1772 | #ifdef CONFIG_XFRM_MIGRATE |
af2f464e SK |
1773 | static inline int xfrm_replay_clone(struct xfrm_state *x, |
1774 | struct xfrm_state *orig) | |
1775 | { | |
91a46c6d AA |
1776 | |
1777 | x->replay_esn = kmemdup(orig->replay_esn, | |
1778 | xfrm_replay_state_esn_len(orig->replay_esn), | |
af2f464e SK |
1779 | GFP_KERNEL); |
1780 | if (!x->replay_esn) | |
1781 | return -ENOMEM; | |
91a46c6d AA |
1782 | x->preplay_esn = kmemdup(orig->preplay_esn, |
1783 | xfrm_replay_state_esn_len(orig->preplay_esn), | |
af2f464e | 1784 | GFP_KERNEL); |
91a46c6d | 1785 | if (!x->preplay_esn) |
af2f464e | 1786 | return -ENOMEM; |
af2f464e SK |
1787 | |
1788 | return 0; | |
1789 | } | |
1790 | ||
ee5c2317 SK |
1791 | static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig) |
1792 | { | |
1793 | return kmemdup(orig, aead_len(orig), GFP_KERNEL); | |
1794 | } | |
1795 | ||
1796 | ||
80c9abaa SS |
1797 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
1798 | { | |
0f99be0d | 1799 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
80c9abaa SS |
1800 | } |
1801 | ||
4447bb33 MW |
1802 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
1803 | { | |
1804 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); | |
1805 | } | |
1806 | ||
80c9abaa SS |
1807 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
1808 | { | |
1809 | int i; | |
1810 | for (i = 0; i < n; i++) | |
1811 | xfrm_state_put(*(states + i)); | |
1812 | } | |
1813 | ||
1814 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1815 | { | |
1816 | int i; | |
1817 | for (i = 0; i < n; i++) | |
1818 | xfrm_state_delete(*(states + i)); | |
1819 | } | |
1820 | #endif | |
f8cd5488 | 1821 | |
def8b4fa | 1822 | #ifdef CONFIG_XFRM |
00501121 HX |
1823 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
1824 | { | |
2294be0f FW |
1825 | struct sec_path *sp = skb_sec_path(skb); |
1826 | ||
1827 | return sp->xvec[sp->len - 1]; | |
00501121 | 1828 | } |
f53c7239 SK |
1829 | #endif |
1830 | ||
54ef207a SK |
1831 | static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb) |
1832 | { | |
f53c7239 | 1833 | #ifdef CONFIG_XFRM |
2294be0f | 1834 | struct sec_path *sp = skb_sec_path(skb); |
54ef207a SK |
1835 | |
1836 | if (!sp || !sp->olen || sp->len != sp->olen) | |
1837 | return NULL; | |
1838 | ||
1839 | return &sp->ovec[sp->olen - 1]; | |
f53c7239 SK |
1840 | #else |
1841 | return NULL; | |
def8b4fa | 1842 | #endif |
f53c7239 | 1843 | } |
00501121 | 1844 | |
e9a441b6 | 1845 | void __init xfrm_dev_init(void); |
b81f884a HL |
1846 | |
1847 | #ifdef CONFIG_XFRM_OFFLOAD | |
f53c7239 SK |
1848 | void xfrm_dev_resume(struct sk_buff *skb); |
1849 | void xfrm_dev_backlog(struct softnet_data *sd); | |
1850 | struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again); | |
d77e38e6 SK |
1851 | int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, |
1852 | struct xfrm_user_offload *xuo); | |
1853 | bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x); | |
1854 | ||
50bd870a YE |
1855 | static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x) |
1856 | { | |
1857 | struct xfrm_state_offload *xso = &x->xso; | |
1858 | ||
1859 | if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn) | |
1860 | xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x); | |
1861 | } | |
1862 | ||
f70f250a SK |
1863 | static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) |
1864 | { | |
1865 | struct xfrm_state *x = dst->xfrm; | |
b6ca8bd5 | 1866 | struct xfrm_dst *xdst; |
f70f250a SK |
1867 | |
1868 | if (!x || !x->type_offload) | |
1869 | return false; | |
1870 | ||
b6ca8bd5 | 1871 | xdst = (struct xfrm_dst *) dst; |
2271d519 SK |
1872 | if (!x->xso.offload_handle && !xdst->child->xfrm) |
1873 | return true; | |
0f6c480f | 1874 | if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) && |
b6ca8bd5 | 1875 | !xdst->child->xfrm) |
f70f250a SK |
1876 | return true; |
1877 | ||
1878 | return false; | |
1879 | } | |
1880 | ||
d77e38e6 SK |
1881 | static inline void xfrm_dev_state_delete(struct xfrm_state *x) |
1882 | { | |
1883 | struct xfrm_state_offload *xso = &x->xso; | |
1884 | ||
1885 | if (xso->dev) | |
1886 | xso->dev->xfrmdev_ops->xdo_dev_state_delete(x); | |
1887 | } | |
1888 | ||
1889 | static inline void xfrm_dev_state_free(struct xfrm_state *x) | |
1890 | { | |
1891 | struct xfrm_state_offload *xso = &x->xso; | |
77990464 | 1892 | struct net_device *dev = xso->dev; |
d77e38e6 SK |
1893 | |
1894 | if (dev && dev->xfrmdev_ops) { | |
7f05b467 SN |
1895 | if (dev->xfrmdev_ops->xdo_dev_state_free) |
1896 | dev->xfrmdev_ops->xdo_dev_state_free(x); | |
d77e38e6 SK |
1897 | xso->dev = NULL; |
1898 | dev_put(dev); | |
1899 | } | |
1900 | } | |
1901 | #else | |
f53c7239 SK |
1902 | static inline void xfrm_dev_resume(struct sk_buff *skb) |
1903 | { | |
1904 | } | |
1905 | ||
1906 | static inline void xfrm_dev_backlog(struct softnet_data *sd) | |
1907 | { | |
1908 | } | |
1909 | ||
1910 | static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again) | |
f6e27114 | 1911 | { |
3dca3f38 | 1912 | return skb; |
f6e27114 SK |
1913 | } |
1914 | ||
d77e38e6 SK |
1915 | static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo) |
1916 | { | |
1917 | return 0; | |
1918 | } | |
1919 | ||
1920 | static inline void xfrm_dev_state_delete(struct xfrm_state *x) | |
1921 | { | |
1922 | } | |
1923 | ||
1924 | static inline void xfrm_dev_state_free(struct xfrm_state *x) | |
1925 | { | |
1926 | } | |
1927 | ||
1928 | static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x) | |
1929 | { | |
1930 | return false; | |
1931 | } | |
f70f250a | 1932 | |
50bd870a YE |
1933 | static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x) |
1934 | { | |
1935 | } | |
1936 | ||
f70f250a SK |
1937 | static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) |
1938 | { | |
1939 | return false; | |
1940 | } | |
d77e38e6 SK |
1941 | #endif |
1942 | ||
bf825f81 JHS |
1943 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
1944 | { | |
1945 | if (attrs[XFRMA_MARK]) | |
4efd7e83 | 1946 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
bf825f81 JHS |
1947 | else |
1948 | m->v = m->m = 0; | |
1949 | ||
1950 | return m->v & m->m; | |
1951 | } | |
1952 | ||
e3dfa389 | 1953 | static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) |
bf825f81 | 1954 | { |
1d1e34dd | 1955 | int ret = 0; |
bf825f81 | 1956 | |
1d1e34dd DM |
1957 | if (m->m | m->v) |
1958 | ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); | |
1959 | return ret; | |
bf825f81 JHS |
1960 | } |
1961 | ||
9b42c1f1 SK |
1962 | static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x) |
1963 | { | |
1964 | struct xfrm_mark *m = &x->props.smark; | |
1965 | ||
1966 | return (m->v & m->m) | (mark & ~m->m); | |
1967 | } | |
1968 | ||
7e652640 SK |
1969 | static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id) |
1970 | { | |
1971 | int ret = 0; | |
1972 | ||
1973 | if (if_id) | |
1974 | ret = nla_put_u32(skb, XFRMA_IF_ID, if_id); | |
1975 | return ret; | |
1976 | } | |
1977 | ||
70be6c91 SK |
1978 | static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, |
1979 | unsigned int family) | |
1980 | { | |
1981 | bool tunnel = false; | |
1982 | ||
1983 | switch(family) { | |
1984 | case AF_INET: | |
1985 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) | |
1986 | tunnel = true; | |
1987 | break; | |
1988 | case AF_INET6: | |
1989 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) | |
1990 | tunnel = true; | |
1991 | break; | |
1992 | } | |
c9500d7b | 1993 | if (tunnel && !(x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL)) |
70be6c91 SK |
1994 | return -EINVAL; |
1995 | ||
1996 | return 0; | |
1997 | } | |
ede64dd2 | 1998 | |
5461fc0c | 1999 | extern const int xfrm_msg_min[XFRM_NR_MSGTYPES]; |
5106f4a8 | 2000 | extern const struct nla_policy xfrma_policy[XFRMA_MAX+1]; |
5461fc0c | 2001 | |
c9e7c76d | 2002 | struct xfrm_translator { |
5461fc0c DS |
2003 | /* Allocate frag_list and put compat translation there */ |
2004 | int (*alloc_compat)(struct sk_buff *skb, const struct nlmsghdr *src); | |
2005 | ||
5106f4a8 DS |
2006 | /* Allocate nlmsg with 64-bit translaton of received 32-bit message */ |
2007 | struct nlmsghdr *(*rcv_msg_compat)(const struct nlmsghdr *nlh, | |
2008 | int maxtype, const struct nla_policy *policy, | |
2009 | struct netlink_ext_ack *extack); | |
2010 | ||
96392ee5 DS |
2011 | /* Translate 32-bit user_policy from sockptr */ |
2012 | int (*xlate_user_policy_sockptr)(u8 **pdata32, int optlen); | |
2013 | ||
c9e7c76d DS |
2014 | struct module *owner; |
2015 | }; | |
2016 | ||
2017 | #if IS_ENABLED(CONFIG_XFRM_USER_COMPAT) | |
2018 | extern int xfrm_register_translator(struct xfrm_translator *xtr); | |
2019 | extern int xfrm_unregister_translator(struct xfrm_translator *xtr); | |
2020 | extern struct xfrm_translator *xfrm_get_translator(void); | |
2021 | extern void xfrm_put_translator(struct xfrm_translator *xtr); | |
2022 | #else | |
2023 | static inline struct xfrm_translator *xfrm_get_translator(void) | |
2024 | { | |
2025 | return NULL; | |
2026 | } | |
2027 | static inline void xfrm_put_translator(struct xfrm_translator *xtr) | |
2028 | { | |
2029 | } | |
2030 | #endif | |
2031 | ||
ede64dd2 FW |
2032 | #if IS_ENABLED(CONFIG_IPV6) |
2033 | static inline bool xfrm6_local_dontfrag(const struct sock *sk) | |
2034 | { | |
2035 | int proto; | |
2036 | ||
2037 | if (!sk || sk->sk_family != AF_INET6) | |
2038 | return false; | |
2039 | ||
2040 | proto = sk->sk_protocol; | |
2041 | if (proto == IPPROTO_UDP || proto == IPPROTO_RAW) | |
2042 | return inet6_sk(sk)->dontfrag; | |
2043 | ||
2044 | return false; | |
2045 | } | |
2046 | #endif | |
1da177e4 | 2047 | #endif /* _NET_XFRM_H */ |