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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> |
1da177e4 LT |
18 | |
19 | #include <net/sock.h> | |
20 | #include <net/dst.h> | |
436a0a40 | 21 | #include <net/ip.h> |
1da177e4 LT |
22 | #include <net/route.h> |
23 | #include <net/ipv6.h> | |
24 | #include <net/ip6_fib.h> | |
fe1a5f03 | 25 | #include <net/flow.h> |
9e0d57fd YP |
26 | |
27 | #include <linux/interrupt.h> | |
28 | ||
558f82ef MN |
29 | #ifdef CONFIG_XFRM_STATISTICS |
30 | #include <net/snmp.h> | |
31 | #endif | |
1da177e4 | 32 | |
d3d6dd3a MN |
33 | #define XFRM_PROTO_ESP 50 |
34 | #define XFRM_PROTO_AH 51 | |
35 | #define XFRM_PROTO_COMP 108 | |
36 | #define XFRM_PROTO_IPIP 4 | |
37 | #define XFRM_PROTO_IPV6 41 | |
38 | #define XFRM_PROTO_ROUTING IPPROTO_ROUTING | |
39 | #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS | |
40 | ||
fa9921e4 | 41 | #define XFRM_ALIGN4(len) (((len) + 3) & ~3) |
1da177e4 | 42 | #define XFRM_ALIGN8(len) (((len) + 7) & ~7) |
b59f45d0 HX |
43 | #define MODULE_ALIAS_XFRM_MODE(family, encap) \ |
44 | MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) | |
d3d6dd3a MN |
45 | #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ |
46 | MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) | |
ffdb5211 IT |
47 | #define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \ |
48 | MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto)) | |
1da177e4 | 49 | |
558f82ef | 50 | #ifdef CONFIG_XFRM_STATISTICS |
59c9940e | 51 | #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) |
558f82ef | 52 | #else |
59c9940e | 53 | #define XFRM_INC_STATS(net, field) ((void)(net)) |
558f82ef MN |
54 | #endif |
55 | ||
1da177e4 LT |
56 | |
57 | /* Organization of SPD aka "XFRM rules" | |
58 | ------------------------------------ | |
59 | ||
60 | Basic objects: | |
61 | - policy rule, struct xfrm_policy (=SPD entry) | |
62 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) | |
63 | - instance of a transformer, struct xfrm_state (=SA) | |
64 | - template to clone xfrm_state, struct xfrm_tmpl | |
65 | ||
66 | SPD is plain linear list of xfrm_policy rules, ordered by priority. | |
67 | (To be compatible with existing pfkeyv2 implementations, | |
68 | many rules with priority of 0x7fffffff are allowed to exist and | |
69 | such rules are ordered in an unpredictable way, thanks to bsd folks.) | |
70 | ||
71 | Lookup is plain linear search until the first match with selector. | |
72 | ||
73 | If "action" is "block", then we prohibit the flow, otherwise: | |
74 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, | |
75 | policy entry has list of up to XFRM_MAX_DEPTH transformations, | |
76 | described by templates xfrm_tmpl. Each template is resolved | |
77 | to a complete xfrm_state (see below) and we pack bundle of transformations | |
78 | to a dst_entry returned to requestor. | |
79 | ||
80 | dst -. xfrm .-> xfrm_state #1 | |
81 | |---. child .-> dst -. xfrm .-> xfrm_state #2 | |
82 | |---. child .-> dst -. xfrm .-> xfrm_state #3 | |
83 | |---. child .-> NULL | |
84 | ||
85 | Bundles are cached at xrfm_policy struct (field ->bundles). | |
86 | ||
87 | ||
88 | Resolution of xrfm_tmpl | |
89 | ----------------------- | |
90 | Template contains: | |
91 | 1. ->mode Mode: transport or tunnel | |
92 | 2. ->id.proto Protocol: AH/ESP/IPCOMP | |
93 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. | |
94 | Q: allow to resolve security gateway? | |
95 | 4. ->id.spi If not zero, static SPI. | |
96 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. | |
97 | 6. ->algos List of allowed algos. Plain bitmask now. | |
98 | Q: ealgos, aalgos, calgos. What a mess... | |
99 | 7. ->share Sharing mode. | |
100 | Q: how to implement private sharing mode? To add struct sock* to | |
101 | flow id? | |
102 | ||
103 | Having this template we search through SAD searching for entries | |
104 | with appropriate mode/proto/algo, permitted by selector. | |
105 | If no appropriate entry found, it is requested from key manager. | |
106 | ||
107 | PROBLEMS: | |
108 | Q: How to find all the bundles referring to a physical path for | |
109 | PMTU discovery? Seems, dst should contain list of all parents... | |
110 | and enter to infinite locking hierarchy disaster. | |
111 | No! It is easier, we will not search for them, let them find us. | |
112 | We add genid to each dst plus pointer to genid of raw IP route, | |
113 | pmtu disc will update pmtu on raw IP route and increase its genid. | |
114 | dst_check() will see this for top level and trigger resyncing | |
115 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. | |
116 | */ | |
117 | ||
12a169e7 HX |
118 | struct xfrm_state_walk { |
119 | struct list_head all; | |
120 | u8 state; | |
d3623099 ND |
121 | u8 dying; |
122 | u8 proto; | |
12a169e7 | 123 | u32 seq; |
870a2df4 | 124 | struct xfrm_address_filter *filter; |
12a169e7 HX |
125 | }; |
126 | ||
d77e38e6 SK |
127 | struct xfrm_state_offload { |
128 | struct net_device *dev; | |
129 | unsigned long offload_handle; | |
130 | unsigned int num_exthdrs; | |
131 | u8 flags; | |
132 | }; | |
133 | ||
1da177e4 | 134 | /* Full description of state of transformer. */ |
fd2c3ef7 | 135 | struct xfrm_state { |
0c5c9fb5 | 136 | possible_net_t xs_net; |
abb81c4f | 137 | union { |
12a169e7 | 138 | struct hlist_node gclist; |
abb81c4f HX |
139 | struct hlist_node bydst; |
140 | }; | |
8f126e37 DM |
141 | struct hlist_node bysrc; |
142 | struct hlist_node byspi; | |
1da177e4 | 143 | |
88755e9c | 144 | refcount_t refcnt; |
1da177e4 LT |
145 | spinlock_t lock; |
146 | ||
147 | struct xfrm_id id; | |
148 | struct xfrm_selector sel; | |
bf825f81 | 149 | struct xfrm_mark mark; |
35d2856b | 150 | u32 tfcpad; |
1da177e4 | 151 | |
9d4a706d DM |
152 | u32 genid; |
153 | ||
12a169e7 HX |
154 | /* Key manager bits */ |
155 | struct xfrm_state_walk km; | |
1da177e4 LT |
156 | |
157 | /* Parameters of this state. */ | |
158 | struct { | |
159 | u32 reqid; | |
160 | u8 mode; | |
161 | u8 replay_window; | |
162 | u8 aalgo, ealgo, calgo; | |
163 | u8 flags; | |
164 | u16 family; | |
165 | xfrm_address_t saddr; | |
166 | int header_len; | |
167 | int trailer_len; | |
a947b0a9 | 168 | u32 extra_flags; |
077fbac4 | 169 | u32 output_mark; |
1da177e4 LT |
170 | } props; |
171 | ||
172 | struct xfrm_lifetime_cfg lft; | |
173 | ||
174 | /* Data for transformer */ | |
4447bb33 | 175 | struct xfrm_algo_auth *aalg; |
1da177e4 LT |
176 | struct xfrm_algo *ealg; |
177 | struct xfrm_algo *calg; | |
1a6509d9 | 178 | struct xfrm_algo_aead *aead; |
69b0137f | 179 | const char *geniv; |
1da177e4 LT |
180 | |
181 | /* Data for encapsulator */ | |
182 | struct xfrm_encap_tmpl *encap; | |
183 | ||
060f02a3 NT |
184 | /* Data for care-of address */ |
185 | xfrm_address_t *coaddr; | |
186 | ||
1da177e4 LT |
187 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
188 | struct xfrm_state *tunnel; | |
189 | ||
190 | /* If a tunnel, number of users + 1 */ | |
191 | atomic_t tunnel_users; | |
192 | ||
193 | /* State for replay detection */ | |
194 | struct xfrm_replay_state replay; | |
9736acf3 | 195 | struct xfrm_replay_state_esn *replay_esn; |
1da177e4 | 196 | |
f8cd5488 JHS |
197 | /* Replay detection state at the time we sent the last notification */ |
198 | struct xfrm_replay_state preplay; | |
9736acf3 | 199 | struct xfrm_replay_state_esn *preplay_esn; |
f8cd5488 | 200 | |
9fdc4883 | 201 | /* The functions for replay detection. */ |
e45a8a9e | 202 | const struct xfrm_replay *repl; |
9fdc4883 | 203 | |
2717096a JHS |
204 | /* internal flag that only holds state for delayed aevent at the |
205 | * moment | |
206 | */ | |
207 | u32 xflags; | |
208 | ||
f8cd5488 JHS |
209 | /* Replay detection notification settings */ |
210 | u32 replay_maxage; | |
211 | u32 replay_maxdiff; | |
212 | ||
213 | /* Replay detection notification timer */ | |
214 | struct timer_list rtimer; | |
215 | ||
1da177e4 LT |
216 | /* Statistics */ |
217 | struct xfrm_stats stats; | |
218 | ||
219 | struct xfrm_lifetime_cur curlft; | |
9e0d57fd | 220 | struct tasklet_hrtimer mtimer; |
1da177e4 | 221 | |
d77e38e6 SK |
222 | struct xfrm_state_offload xso; |
223 | ||
e3c0d047 FD |
224 | /* used to fix curlft->add_time when changing date */ |
225 | long saved_tmo; | |
226 | ||
9afaca05 | 227 | /* Last used time */ |
d26f3984 | 228 | unsigned long lastused; |
9afaca05 | 229 | |
cac2661c SK |
230 | struct page_frag xfrag; |
231 | ||
1da177e4 LT |
232 | /* Reference to data common to all the instances of this |
233 | * transformer. */ | |
533cb5b0 | 234 | const struct xfrm_type *type; |
13996378 | 235 | struct xfrm_mode *inner_mode; |
df9dcb45 | 236 | struct xfrm_mode *inner_mode_iaf; |
13996378 | 237 | struct xfrm_mode *outer_mode; |
1da177e4 | 238 | |
9d389d7f SK |
239 | const struct xfrm_type_offload *type_offload; |
240 | ||
df71837d TJ |
241 | /* Security context */ |
242 | struct xfrm_sec_ctx *security; | |
243 | ||
1da177e4 LT |
244 | /* Private data of this transformer, format is opaque, |
245 | * interpreted by xfrm_type methods. */ | |
246 | void *data; | |
247 | }; | |
248 | ||
673c09be AD |
249 | static inline struct net *xs_net(struct xfrm_state *x) |
250 | { | |
251 | return read_pnet(&x->xs_net); | |
252 | } | |
253 | ||
2717096a JHS |
254 | /* xflags - make enum if more show up */ |
255 | #define XFRM_TIME_DEFER 1 | |
e3c0d047 | 256 | #define XFRM_SOFT_EXPIRE 2 |
2717096a | 257 | |
1da177e4 LT |
258 | enum { |
259 | XFRM_STATE_VOID, | |
260 | XFRM_STATE_ACQ, | |
261 | XFRM_STATE_VALID, | |
262 | XFRM_STATE_ERROR, | |
263 | XFRM_STATE_EXPIRED, | |
264 | XFRM_STATE_DEAD | |
265 | }; | |
266 | ||
26b15dad | 267 | /* callback structure passed from either netlink or pfkey */ |
fd2c3ef7 | 268 | struct km_event { |
bf08867f HX |
269 | union { |
270 | u32 hard; | |
271 | u32 proto; | |
272 | u32 byid; | |
f8cd5488 | 273 | u32 aevent; |
f7b6983f | 274 | u32 type; |
bf08867f HX |
275 | } data; |
276 | ||
26b15dad | 277 | u32 seq; |
15e47304 | 278 | u32 portid; |
26b15dad | 279 | u32 event; |
7067802e | 280 | struct net *net; |
26b15dad JHS |
281 | }; |
282 | ||
9fdc4883 SK |
283 | struct xfrm_replay { |
284 | void (*advance)(struct xfrm_state *x, __be32 net_seq); | |
285 | int (*check)(struct xfrm_state *x, | |
286 | struct sk_buff *skb, | |
287 | __be32 net_seq); | |
3b59df46 SK |
288 | int (*recheck)(struct xfrm_state *x, |
289 | struct sk_buff *skb, | |
290 | __be32 net_seq); | |
9fdc4883 SK |
291 | void (*notify)(struct xfrm_state *x, int event); |
292 | int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); | |
293 | }; | |
294 | ||
25ee3286 | 295 | struct net_device; |
1da177e4 LT |
296 | struct xfrm_type; |
297 | struct xfrm_dst; | |
298 | struct xfrm_policy_afinfo { | |
1da177e4 | 299 | struct dst_ops *dst_ops; |
42a7b32b DA |
300 | struct dst_entry *(*dst_lookup)(struct net *net, |
301 | int tos, int oif, | |
5e6b930f | 302 | const xfrm_address_t *saddr, |
077fbac4 LC |
303 | const xfrm_address_t *daddr, |
304 | u32 mark); | |
42a7b32b DA |
305 | int (*get_saddr)(struct net *net, int oif, |
306 | xfrm_address_t *saddr, | |
077fbac4 LC |
307 | xfrm_address_t *daddr, |
308 | u32 mark); | |
1da177e4 | 309 | void (*decode_session)(struct sk_buff *skb, |
d5422efe HX |
310 | struct flowi *fl, |
311 | int reverse); | |
05d84025 | 312 | int (*get_tos)(const struct flowi *fl); |
a1b05140 MN |
313 | int (*init_path)(struct xfrm_dst *path, |
314 | struct dst_entry *dst, | |
315 | int nfheader_len); | |
25ee3286 | 316 | int (*fill_dst)(struct xfrm_dst *xdst, |
87c1e12b | 317 | struct net_device *dev, |
0c7b3eef | 318 | const struct flowi *fl); |
2774c131 | 319 | struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); |
1da177e4 LT |
320 | }; |
321 | ||
a2817d8b FW |
322 | int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family); |
323 | void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo); | |
d511337a JP |
324 | void km_policy_notify(struct xfrm_policy *xp, int dir, |
325 | const struct km_event *c); | |
ec30d78c | 326 | void xfrm_policy_cache_flush(void); |
d511337a | 327 | void km_state_notify(struct xfrm_state *x, const struct km_event *c); |
1da177e4 LT |
328 | |
329 | struct xfrm_tmpl; | |
d511337a JP |
330 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, |
331 | struct xfrm_policy *pol); | |
332 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); | |
333 | int __xfrm_state_delete(struct xfrm_state *x); | |
53bc6b4d | 334 | |
1da177e4 | 335 | struct xfrm_state_afinfo { |
9d389d7f SK |
336 | unsigned int family; |
337 | unsigned int proto; | |
338 | __be16 eth_proto; | |
339 | struct module *owner; | |
340 | const struct xfrm_type *type_map[IPPROTO_MAX]; | |
341 | const struct xfrm_type_offload *type_offload_map[IPPROTO_MAX]; | |
342 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; | |
343 | ||
d094cd83 | 344 | int (*init_flags)(struct xfrm_state *x); |
73e5ebb2 DM |
345 | void (*init_tempsel)(struct xfrm_selector *sel, |
346 | const struct flowi *fl); | |
19bd6244 DM |
347 | void (*init_temprop)(struct xfrm_state *x, |
348 | const struct xfrm_tmpl *tmpl, | |
349 | const xfrm_address_t *daddr, | |
350 | const xfrm_address_t *saddr); | |
41a49cc3 MN |
351 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
352 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); | |
ede2059d | 353 | int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb); |
7026b1dd | 354 | int (*output_finish)(struct sock *sk, struct sk_buff *skb); |
227620e2 HX |
355 | int (*extract_input)(struct xfrm_state *x, |
356 | struct sk_buff *skb); | |
36cf9acf HX |
357 | int (*extract_output)(struct xfrm_state *x, |
358 | struct sk_buff *skb); | |
716062fd HX |
359 | int (*transport_finish)(struct sk_buff *skb, |
360 | int async); | |
628e341f | 361 | void (*local_error)(struct sk_buff *skb, u32 mtu); |
1da177e4 LT |
362 | }; |
363 | ||
d511337a JP |
364 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); |
365 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
366 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); | |
711059b9 | 367 | struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family); |
1da177e4 | 368 | |
2f32b51b SK |
369 | struct xfrm_input_afinfo { |
370 | unsigned int family; | |
2f32b51b SK |
371 | int (*callback)(struct sk_buff *skb, u8 protocol, |
372 | int err); | |
373 | }; | |
374 | ||
960fdfde FW |
375 | int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo); |
376 | int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo); | |
2f32b51b | 377 | |
b48c05ab | 378 | void xfrm_flush_gc(void); |
d511337a | 379 | void xfrm_state_delete_tunnel(struct xfrm_state *x); |
1da177e4 | 380 | |
fd2c3ef7 | 381 | struct xfrm_type { |
1da177e4 LT |
382 | char *description; |
383 | struct module *owner; | |
a6337463 | 384 | u8 proto; |
385 | u8 flags; | |
1b5c2299 | 386 | #define XFRM_TYPE_NON_FRAGMENT 1 |
436a0a40 | 387 | #define XFRM_TYPE_REPLAY_PROT 2 |
f04e7e8d HX |
388 | #define XFRM_TYPE_LOCAL_COADDR 4 |
389 | #define XFRM_TYPE_REMOTE_COADDR 8 | |
1da177e4 | 390 | |
72cb6962 | 391 | int (*init_state)(struct xfrm_state *x); |
1da177e4 | 392 | void (*destructor)(struct xfrm_state *); |
e695633e | 393 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 394 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
8f029de2 DM |
395 | int (*reject)(struct xfrm_state *, struct sk_buff *, |
396 | const struct flowi *); | |
aee5adb4 | 397 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
1da177e4 | 398 | /* Estimate maximal size of result of transformation of a dgram */ |
c5c25238 | 399 | u32 (*get_mtu)(struct xfrm_state *, int size); |
1da177e4 LT |
400 | }; |
401 | ||
d511337a JP |
402 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
403 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); | |
1da177e4 | 404 | |
9d389d7f SK |
405 | struct xfrm_type_offload { |
406 | char *description; | |
407 | struct module *owner; | |
408 | u8 proto; | |
409 | void (*encap)(struct xfrm_state *, struct sk_buff *pskb); | |
410 | int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb); | |
411 | int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features); | |
412 | }; | |
413 | ||
414 | int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family); | |
415 | int xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family); | |
416 | ||
b59f45d0 | 417 | struct xfrm_mode { |
227620e2 HX |
418 | /* |
419 | * Remove encapsulation header. | |
420 | * | |
421 | * The IP header will be moved over the top of the encapsulation | |
422 | * header. | |
423 | * | |
424 | * On entry, the transport header shall point to where the IP header | |
425 | * should be and the network header shall be set to where the IP | |
426 | * header currently is. skb->data shall point to the start of the | |
427 | * payload. | |
428 | */ | |
429 | int (*input2)(struct xfrm_state *x, struct sk_buff *skb); | |
430 | ||
431 | /* | |
432 | * This is the actual input entry point. | |
433 | * | |
434 | * For transport mode and equivalent this would be identical to | |
435 | * input2 (which does not need to be set). While tunnel mode | |
436 | * and equivalent would set this to the tunnel encapsulation function | |
437 | * xfrm4_prepare_input that would in turn call input2. | |
438 | */ | |
b59f45d0 | 439 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); |
37fedd3a HX |
440 | |
441 | /* | |
442 | * Add encapsulation header. | |
443 | * | |
444 | * On exit, the transport header will be set to the start of the | |
445 | * encapsulation header to be filled in by x->type->output and | |
446 | * the mac header will be set to the nextheader (protocol for | |
447 | * IPv4) field of the extension header directly preceding the | |
448 | * encapsulation header, or in its absence, that of the top IP | |
449 | * header. The value of the network header will always point | |
450 | * to the top IP header while skb->data will point to the payload. | |
451 | */ | |
36cf9acf HX |
452 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); |
453 | ||
454 | /* | |
455 | * This is the actual output entry point. | |
456 | * | |
457 | * For transport mode and equivalent this would be identical to | |
458 | * output2 (which does not need to be set). While tunnel mode | |
459 | * and equivalent would set this to a tunnel encapsulation function | |
460 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn | |
461 | * call output2. | |
462 | */ | |
463 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); | |
b59f45d0 | 464 | |
c35fe410 SK |
465 | /* |
466 | * Adjust pointers into the packet and do GSO segmentation. | |
467 | */ | |
468 | struct sk_buff *(*gso_segment)(struct xfrm_state *x, struct sk_buff *skb, netdev_features_t features); | |
469 | ||
470 | /* | |
471 | * Adjust pointers into the packet when IPsec is done at layer2. | |
472 | */ | |
473 | void (*xmit)(struct xfrm_state *x, struct sk_buff *skb); | |
474 | ||
17c2a42a | 475 | struct xfrm_state_afinfo *afinfo; |
b59f45d0 HX |
476 | struct module *owner; |
477 | unsigned int encap; | |
1bfcb10f HX |
478 | int flags; |
479 | }; | |
480 | ||
481 | /* Flags for xfrm_mode. */ | |
482 | enum { | |
483 | XFRM_MODE_FLAG_TUNNEL = 1, | |
b59f45d0 HX |
484 | }; |
485 | ||
d511337a JP |
486 | int xfrm_register_mode(struct xfrm_mode *mode, int family); |
487 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family); | |
b59f45d0 | 488 | |
df9dcb45 KM |
489 | static inline int xfrm_af2proto(unsigned int family) |
490 | { | |
491 | switch(family) { | |
492 | case AF_INET: | |
493 | return IPPROTO_IPIP; | |
494 | case AF_INET6: | |
495 | return IPPROTO_IPV6; | |
496 | default: | |
497 | return 0; | |
498 | } | |
499 | } | |
500 | ||
501 | static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) | |
502 | { | |
503 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || | |
504 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) | |
505 | return x->inner_mode; | |
506 | else | |
507 | return x->inner_mode_iaf; | |
508 | } | |
509 | ||
fd2c3ef7 | 510 | struct xfrm_tmpl { |
1da177e4 LT |
511 | /* id in template is interpreted as: |
512 | * daddr - destination of tunnel, may be zero for transport mode. | |
513 | * spi - zero to acquire spi. Not zero if spi is static, then | |
514 | * daddr must be fixed too. | |
515 | * proto - AH/ESP/IPCOMP | |
516 | */ | |
517 | struct xfrm_id id; | |
518 | ||
519 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
520 | xfrm_address_t saddr; | |
521 | ||
76b3f055 MK |
522 | unsigned short encap_family; |
523 | ||
a6337463 | 524 | u32 reqid; |
1da177e4 | 525 | |
7e49e6de | 526 | /* Mode: transport, tunnel etc. */ |
a6337463 | 527 | u8 mode; |
1da177e4 LT |
528 | |
529 | /* Sharing mode: unique, this session only, this user only etc. */ | |
a6337463 | 530 | u8 share; |
1da177e4 LT |
531 | |
532 | /* May skip this transfomration if no SA is found */ | |
a6337463 | 533 | u8 optional; |
1da177e4 | 534 | |
c5d18e98 | 535 | /* Skip aalgos/ealgos/calgos checks. */ |
a6337463 | 536 | u8 allalgs; |
c5d18e98 | 537 | |
1da177e4 | 538 | /* Bit mask of algos allowed for acquisition */ |
a6337463 | 539 | u32 aalgos; |
540 | u32 ealgos; | |
541 | u32 calgos; | |
1da177e4 LT |
542 | }; |
543 | ||
622dc828 | 544 | #define XFRM_MAX_DEPTH 6 |
54ef207a | 545 | #define XFRM_MAX_OFFLOAD_DEPTH 1 |
1da177e4 | 546 | |
12a169e7 HX |
547 | struct xfrm_policy_walk_entry { |
548 | struct list_head all; | |
549 | u8 dead; | |
550 | }; | |
551 | ||
552 | struct xfrm_policy_walk { | |
553 | struct xfrm_policy_walk_entry walk; | |
554 | u8 type; | |
555 | u32 seq; | |
556 | }; | |
557 | ||
a0073fe1 SK |
558 | struct xfrm_policy_queue { |
559 | struct sk_buff_head hold_queue; | |
560 | struct timer_list hold_timer; | |
561 | unsigned long timeout; | |
562 | }; | |
563 | ||
fd2c3ef7 | 564 | struct xfrm_policy { |
0c5c9fb5 | 565 | possible_net_t xp_net; |
2518c7c2 DM |
566 | struct hlist_node bydst; |
567 | struct hlist_node byidx; | |
1da177e4 LT |
568 | |
569 | /* This lock only affects elements except for entry. */ | |
570 | rwlock_t lock; | |
850a6212 | 571 | refcount_t refcnt; |
1da177e4 LT |
572 | struct timer_list timer; |
573 | ||
80c802f3 | 574 | atomic_t genid; |
1da177e4 LT |
575 | u32 priority; |
576 | u32 index; | |
bf825f81 | 577 | struct xfrm_mark mark; |
1da177e4 LT |
578 | struct xfrm_selector selector; |
579 | struct xfrm_lifetime_cfg lft; | |
580 | struct xfrm_lifetime_cur curlft; | |
12a169e7 | 581 | struct xfrm_policy_walk_entry walk; |
a0073fe1 | 582 | struct xfrm_policy_queue polq; |
46ca5f5d ACM |
583 | u8 type; |
584 | u8 action; | |
585 | u8 flags; | |
46ca5f5d | 586 | u8 xfrm_nr; |
12a169e7 | 587 | u16 family; |
df71837d | 588 | struct xfrm_sec_ctx *security; |
1da177e4 | 589 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
56f04730 | 590 | struct rcu_head rcu; |
1da177e4 LT |
591 | }; |
592 | ||
63eb23f5 | 593 | static inline struct net *xp_net(const struct xfrm_policy *xp) |
0331b1f3 AD |
594 | { |
595 | return read_pnet(&xp->xp_net); | |
596 | } | |
597 | ||
13c1d189 AE |
598 | struct xfrm_kmaddress { |
599 | xfrm_address_t local; | |
600 | xfrm_address_t remote; | |
601 | u32 reserved; | |
602 | u16 family; | |
603 | }; | |
604 | ||
80c9abaa SS |
605 | struct xfrm_migrate { |
606 | xfrm_address_t old_daddr; | |
607 | xfrm_address_t old_saddr; | |
608 | xfrm_address_t new_daddr; | |
609 | xfrm_address_t new_saddr; | |
610 | u8 proto; | |
611 | u8 mode; | |
612 | u16 reserved; | |
613 | u32 reqid; | |
614 | u16 old_family; | |
615 | u16 new_family; | |
616 | }; | |
617 | ||
f8cd5488 | 618 | #define XFRM_KM_TIMEOUT 30 |
f8cd5488 JHS |
619 | /* what happened */ |
620 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
621 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
622 | ||
623 | /* default aevent timeout in units of 100ms */ | |
624 | #define XFRM_AE_ETIME 10 | |
625 | /* Async Event timer multiplier */ | |
626 | #define XFRM_AE_ETH_M 10 | |
627 | /* default seq threshold size */ | |
628 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 | 629 | |
fd2c3ef7 | 630 | struct xfrm_mgr { |
1da177e4 | 631 | struct list_head list; |
214e005b | 632 | int (*notify)(struct xfrm_state *x, const struct km_event *c); |
65e0736b | 633 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); |
cb969f07 | 634 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 635 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
214e005b | 636 | int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); |
db983c11 | 637 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
183cad12 DM |
638 | int (*migrate)(const struct xfrm_selector *sel, |
639 | u8 dir, u8 type, | |
640 | const struct xfrm_migrate *m, | |
641 | int num_bundles, | |
8bafd730 AA |
642 | const struct xfrm_kmaddress *k, |
643 | const struct xfrm_encap_tmpl *encap); | |
0f24558e | 644 | bool (*is_alive)(const struct km_event *c); |
1da177e4 LT |
645 | }; |
646 | ||
d511337a JP |
647 | int xfrm_register_km(struct xfrm_mgr *km); |
648 | int xfrm_unregister_km(struct xfrm_mgr *km); | |
1da177e4 | 649 | |
70be6c91 SK |
650 | struct xfrm_tunnel_skb_cb { |
651 | union { | |
652 | struct inet_skb_parm h4; | |
653 | struct inet6_skb_parm h6; | |
654 | } header; | |
655 | ||
656 | union { | |
657 | struct ip_tunnel *ip4; | |
658 | struct ip6_tnl *ip6; | |
659 | } tunnel; | |
660 | }; | |
661 | ||
662 | #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) | |
663 | ||
436a0a40 HX |
664 | /* |
665 | * This structure is used for the duration where packets are being | |
666 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
667 | * area beyond the generic IP part may be overwritten. | |
668 | */ | |
669 | struct xfrm_skb_cb { | |
70be6c91 | 670 | struct xfrm_tunnel_skb_cb header; |
436a0a40 HX |
671 | |
672 | /* Sequence number for replay protection. */ | |
b318e0e4 | 673 | union { |
1ce3644a SK |
674 | struct { |
675 | __u32 low; | |
676 | __u32 hi; | |
677 | } output; | |
678 | struct { | |
679 | __be32 low; | |
680 | __be32 hi; | |
681 | } input; | |
b318e0e4 | 682 | } seq; |
436a0a40 HX |
683 | }; |
684 | ||
685 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
686 | ||
36cf9acf HX |
687 | /* |
688 | * This structure is used by the afinfo prepare_input/prepare_output functions | |
689 | * to transmit header information to the mode input/output functions. | |
690 | */ | |
691 | struct xfrm_mode_skb_cb { | |
70be6c91 | 692 | struct xfrm_tunnel_skb_cb header; |
36cf9acf HX |
693 | |
694 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
695 | __be16 id; | |
696 | __be16 frag_off; | |
697 | ||
732c8bd5 HX |
698 | /* IP header length (excluding options or extension headers). */ |
699 | u8 ihl; | |
700 | ||
36cf9acf HX |
701 | /* TOS for IPv4, class for IPv6. */ |
702 | u8 tos; | |
703 | ||
704 | /* TTL for IPv4, hop limitfor IPv6. */ | |
705 | u8 ttl; | |
706 | ||
707 | /* Protocol for IPv4, NH for IPv6. */ | |
708 | u8 protocol; | |
709 | ||
732c8bd5 HX |
710 | /* Option length for IPv4, zero for IPv6. */ |
711 | u8 optlen; | |
712 | ||
36cf9acf HX |
713 | /* Used by IPv6 only, zero for IPv4. */ |
714 | u8 flow_lbl[3]; | |
715 | }; | |
716 | ||
717 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
718 | ||
716062fd HX |
719 | /* |
720 | * This structure is used by the input processing to locate the SPI and | |
721 | * related information. | |
722 | */ | |
723 | struct xfrm_spi_skb_cb { | |
70be6c91 | 724 | struct xfrm_tunnel_skb_cb header; |
716062fd | 725 | |
716062fd | 726 | unsigned int daddroff; |
2fcb45b6 | 727 | unsigned int family; |
7785bba2 | 728 | __be32 seq; |
716062fd HX |
729 | }; |
730 | ||
731 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) | |
732 | ||
c9204d9c | 733 | #ifdef CONFIG_AUDITSYSCALL |
afeb14b4 | 734 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
ab5f5e8b JL |
735 | { |
736 | struct audit_buffer *audit_buf = NULL; | |
ab5f5e8b | 737 | |
afeb14b4 PM |
738 | if (audit_enabled == 0) |
739 | return NULL; | |
cdfb6b34 | 740 | audit_buf = audit_log_start(audit_context(), GFP_ATOMIC, |
afeb14b4 | 741 | AUDIT_MAC_IPSEC_EVENT); |
ab5f5e8b JL |
742 | if (audit_buf == NULL) |
743 | return NULL; | |
afeb14b4 PM |
744 | audit_log_format(audit_buf, "op=%s", op); |
745 | return audit_buf; | |
746 | } | |
ab5f5e8b | 747 | |
2e71029e | 748 | static inline void xfrm_audit_helper_usrinfo(bool task_valid, |
afeb14b4 PM |
749 | struct audit_buffer *audit_buf) |
750 | { | |
2e71029e TH |
751 | const unsigned int auid = from_kuid(&init_user_ns, task_valid ? |
752 | audit_get_loginuid(current) : | |
753 | INVALID_UID); | |
754 | const unsigned int ses = task_valid ? audit_get_sessionid(current) : | |
f0b75216 | 755 | AUDIT_SID_UNSET; |
2e71029e TH |
756 | |
757 | audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); | |
f1370cc4 | 758 | audit_log_task_context(audit_buf); |
ab5f5e8b JL |
759 | } |
760 | ||
2e71029e TH |
761 | void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid); |
762 | void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
763 | bool task_valid); | |
764 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid); | |
765 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid); | |
d511337a JP |
766 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
767 | struct sk_buff *skb); | |
768 | void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, | |
769 | __be32 net_seq); | |
770 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); | |
771 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, | |
772 | __be32 net_seq); | |
773 | void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, | |
774 | u8 proto); | |
c9204d9c | 775 | #else |
41fef0ee MS |
776 | |
777 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
2e71029e | 778 | bool task_valid) |
41fef0ee MS |
779 | { |
780 | } | |
781 | ||
782 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
2e71029e | 783 | bool task_valid) |
41fef0ee MS |
784 | { |
785 | } | |
786 | ||
787 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
2e71029e | 788 | bool task_valid) |
41fef0ee MS |
789 | { |
790 | } | |
791 | ||
792 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
2e71029e | 793 | bool task_valid) |
41fef0ee MS |
794 | { |
795 | } | |
796 | ||
797 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
798 | struct sk_buff *skb) | |
799 | { | |
800 | } | |
801 | ||
9fdc4883 SK |
802 | static inline void xfrm_audit_state_replay(struct xfrm_state *x, |
803 | struct sk_buff *skb, __be32 net_seq) | |
804 | { | |
805 | } | |
806 | ||
41fef0ee MS |
807 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, |
808 | u16 family) | |
809 | { | |
810 | } | |
811 | ||
812 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
813 | __be32 net_spi, __be32 net_seq) | |
814 | { | |
815 | } | |
816 | ||
817 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
818 | struct sk_buff *skb, u8 proto) | |
819 | { | |
820 | } | |
c9204d9c | 821 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 822 | |
1da177e4 LT |
823 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
824 | { | |
825 | if (likely(policy != NULL)) | |
850a6212 | 826 | refcount_inc(&policy->refcnt); |
1da177e4 LT |
827 | } |
828 | ||
d511337a | 829 | void xfrm_policy_destroy(struct xfrm_policy *policy); |
1da177e4 LT |
830 | |
831 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
832 | { | |
850a6212 | 833 | if (refcount_dec_and_test(&policy->refcnt)) |
64c31b3f | 834 | xfrm_policy_destroy(policy); |
1da177e4 LT |
835 | } |
836 | ||
4e81bb83 MN |
837 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
838 | { | |
839 | int i; | |
840 | for (i = npols - 1; i >= 0; --i) | |
841 | xfrm_pol_put(pols[i]); | |
842 | } | |
4e81bb83 | 843 | |
d511337a | 844 | void __xfrm_state_destroy(struct xfrm_state *); |
1da177e4 | 845 | |
21380b81 HX |
846 | static inline void __xfrm_state_put(struct xfrm_state *x) |
847 | { | |
88755e9c | 848 | refcount_dec(&x->refcnt); |
21380b81 HX |
849 | } |
850 | ||
1da177e4 LT |
851 | static inline void xfrm_state_put(struct xfrm_state *x) |
852 | { | |
88755e9c | 853 | if (refcount_dec_and_test(&x->refcnt)) |
1da177e4 LT |
854 | __xfrm_state_destroy(x); |
855 | } | |
856 | ||
857 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
858 | { | |
88755e9c | 859 | refcount_inc(&x->refcnt); |
1da177e4 LT |
860 | } |
861 | ||
1744a8fe | 862 | static inline bool addr_match(const void *token1, const void *token2, |
e1b0048e | 863 | unsigned int prefixlen) |
1da177e4 | 864 | { |
1744a8fe DM |
865 | const __be32 *a1 = token1; |
866 | const __be32 *a2 = token2; | |
e1b0048e AD |
867 | unsigned int pdw; |
868 | unsigned int pbi; | |
1da177e4 | 869 | |
a6337463 | 870 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
1da177e4 LT |
871 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
872 | ||
873 | if (pdw) | |
874 | if (memcmp(a1, a2, pdw << 2)) | |
1744a8fe | 875 | return false; |
1da177e4 LT |
876 | |
877 | if (pbi) { | |
5f19343f | 878 | __be32 mask; |
1da177e4 LT |
879 | |
880 | mask = htonl((0xffffffff) << (32 - pbi)); | |
881 | ||
882 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
1744a8fe | 883 | return false; |
1da177e4 LT |
884 | } |
885 | ||
1744a8fe | 886 | return true; |
1da177e4 LT |
887 | } |
888 | ||
26bff940 AD |
889 | static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) |
890 | { | |
891 | /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ | |
6c786bcb | 892 | if (sizeof(long) == 4 && prefixlen == 0) |
26bff940 | 893 | return true; |
6c786bcb | 894 | return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen))); |
26bff940 AD |
895 | } |
896 | ||
1da177e4 | 897 | static __inline__ |
6281dcc9 | 898 | __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 899 | { |
f9d07e41 | 900 | __be16 port; |
1d28f42c | 901 | switch(fl->flowi_proto) { |
1da177e4 LT |
902 | case IPPROTO_TCP: |
903 | case IPPROTO_UDP: | |
ba4e58ec | 904 | case IPPROTO_UDPLITE: |
1da177e4 | 905 | case IPPROTO_SCTP: |
6281dcc9 | 906 | port = uli->ports.sport; |
1da177e4 LT |
907 | break; |
908 | case IPPROTO_ICMP: | |
909 | case IPPROTO_ICMPV6: | |
6281dcc9 | 910 | port = htons(uli->icmpt.type); |
1da177e4 | 911 | break; |
2ce4272a | 912 | case IPPROTO_MH: |
6281dcc9 | 913 | port = htons(uli->mht.type); |
2ce4272a | 914 | break; |
cc9ff19d | 915 | case IPPROTO_GRE: |
6281dcc9 | 916 | port = htons(ntohl(uli->gre_key) >> 16); |
cc9ff19d | 917 | break; |
1da177e4 LT |
918 | default: |
919 | port = 0; /*XXX*/ | |
920 | } | |
921 | return port; | |
922 | } | |
923 | ||
924 | static __inline__ | |
6281dcc9 | 925 | __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 926 | { |
f9d07e41 | 927 | __be16 port; |
1d28f42c | 928 | switch(fl->flowi_proto) { |
1da177e4 LT |
929 | case IPPROTO_TCP: |
930 | case IPPROTO_UDP: | |
ba4e58ec | 931 | case IPPROTO_UDPLITE: |
1da177e4 | 932 | case IPPROTO_SCTP: |
6281dcc9 | 933 | port = uli->ports.dport; |
1da177e4 LT |
934 | break; |
935 | case IPPROTO_ICMP: | |
936 | case IPPROTO_ICMPV6: | |
6281dcc9 | 937 | port = htons(uli->icmpt.code); |
1da177e4 | 938 | break; |
cc9ff19d | 939 | case IPPROTO_GRE: |
6281dcc9 | 940 | port = htons(ntohl(uli->gre_key) & 0xffff); |
cc9ff19d | 941 | break; |
1da177e4 LT |
942 | default: |
943 | port = 0; /*XXX*/ | |
944 | } | |
945 | return port; | |
946 | } | |
947 | ||
d511337a JP |
948 | bool xfrm_selector_match(const struct xfrm_selector *sel, |
949 | const struct flowi *fl, unsigned short family); | |
1da177e4 | 950 | |
df71837d TJ |
951 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
952 | /* If neither has a context --> match | |
953 | * Otherwise, both must have a context and the sids, doi, alg must match | |
954 | */ | |
bc9b35ad | 955 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d TJ |
956 | { |
957 | return ((!s1 && !s2) || | |
958 | (s1 && s2 && | |
959 | (s1->ctx_sid == s2->ctx_sid) && | |
960 | (s1->ctx_doi == s2->ctx_doi) && | |
961 | (s1->ctx_alg == s2->ctx_alg))); | |
962 | } | |
963 | #else | |
bc9b35ad | 964 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d | 965 | { |
bc9b35ad | 966 | return true; |
df71837d TJ |
967 | } |
968 | #endif | |
969 | ||
1da177e4 LT |
970 | /* A struct encoding bundle of transformations to apply to some set of flow. |
971 | * | |
b6ca8bd5 | 972 | * xdst->child points to the next element of bundle. |
1da177e4 LT |
973 | * dst->xfrm points to an instanse of transformer. |
974 | * | |
975 | * Due to unfortunate limitations of current routing cache, which we | |
976 | * have no time to fix, it mirrors struct rtable and bound to the same | |
977 | * routing key, including saddr,daddr. However, we can have many of | |
978 | * bundles differing by session id. All the bundles grow from a parent | |
979 | * policy rule. | |
980 | */ | |
fd2c3ef7 | 981 | struct xfrm_dst { |
1da177e4 | 982 | union { |
1da177e4 LT |
983 | struct dst_entry dst; |
984 | struct rtable rt; | |
985 | struct rt6_info rt6; | |
986 | } u; | |
987 | struct dst_entry *route; | |
b6ca8bd5 | 988 | struct dst_entry *child; |
0f6c480f | 989 | struct dst_entry *path; |
80c802f3 TT |
990 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; |
991 | int num_pols, num_xfrms; | |
80c802f3 TT |
992 | u32 xfrm_genid; |
993 | u32 policy_genid; | |
1da177e4 LT |
994 | u32 route_mtu_cached; |
995 | u32 child_mtu_cached; | |
92d63dec HY |
996 | u32 route_cookie; |
997 | u32 path_cookie; | |
1da177e4 LT |
998 | }; |
999 | ||
0f6c480f DM |
1000 | static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst) |
1001 | { | |
1002 | #ifdef CONFIG_XFRM | |
1003 | if (dst->xfrm) { | |
1004 | const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst; | |
1005 | ||
1006 | return xdst->path; | |
1007 | } | |
1008 | #endif | |
1009 | return (struct dst_entry *) dst; | |
1010 | } | |
1011 | ||
b92cf4aa DM |
1012 | static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst) |
1013 | { | |
1014 | #ifdef CONFIG_XFRM | |
b6ca8bd5 DM |
1015 | if (dst->xfrm) { |
1016 | struct xfrm_dst *xdst = (struct xfrm_dst *) dst; | |
1017 | return xdst->child; | |
1018 | } | |
b92cf4aa DM |
1019 | #endif |
1020 | return NULL; | |
1021 | } | |
1022 | ||
def8b4fa | 1023 | #ifdef CONFIG_XFRM |
45b018be DM |
1024 | static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child) |
1025 | { | |
b6ca8bd5 | 1026 | xdst->child = child; |
45b018be DM |
1027 | } |
1028 | ||
aabc9761 HX |
1029 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
1030 | { | |
80c802f3 | 1031 | xfrm_pols_put(xdst->pols, xdst->num_pols); |
aabc9761 HX |
1032 | dst_release(xdst->route); |
1033 | if (likely(xdst->u.dst.xfrm)) | |
1034 | xfrm_state_put(xdst->u.dst.xfrm); | |
1035 | } | |
def8b4fa | 1036 | #endif |
aabc9761 | 1037 | |
d511337a | 1038 | void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); |
aabc9761 | 1039 | |
54ef207a SK |
1040 | struct xfrm_offload { |
1041 | /* Output sequence number for replay protection on offloading. */ | |
1042 | struct { | |
1043 | __u32 low; | |
1044 | __u32 hi; | |
1045 | } seq; | |
1046 | ||
1047 | __u32 flags; | |
1048 | #define SA_DELETE_REQ 1 | |
1049 | #define CRYPTO_DONE 2 | |
1050 | #define CRYPTO_NEXT_DONE 4 | |
1051 | #define CRYPTO_FALLBACK 8 | |
1052 | #define XFRM_GSO_SEGMENT 16 | |
1053 | #define XFRM_GRO 32 | |
47ebcc0b | 1054 | #define XFRM_ESP_NO_TRAILER 64 |
f53c7239 | 1055 | #define XFRM_DEV_RESUME 128 |
54ef207a SK |
1056 | |
1057 | __u32 status; | |
1058 | #define CRYPTO_SUCCESS 1 | |
1059 | #define CRYPTO_GENERIC_ERROR 2 | |
1060 | #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4 | |
1061 | #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8 | |
1062 | #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16 | |
1063 | #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32 | |
1064 | #define CRYPTO_INVALID_PACKET_SYNTAX 64 | |
1065 | #define CRYPTO_INVALID_PROTOCOL 128 | |
1066 | ||
1067 | __u8 proto; | |
1068 | }; | |
1069 | ||
fd2c3ef7 | 1070 | struct sec_path { |
55eabed6 | 1071 | refcount_t refcnt; |
1da177e4 | 1072 | int len; |
54ef207a SK |
1073 | int olen; |
1074 | ||
dbe5b4aa | 1075 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
54ef207a | 1076 | struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH]; |
1da177e4 LT |
1077 | }; |
1078 | ||
990078af MS |
1079 | static inline int secpath_exists(struct sk_buff *skb) |
1080 | { | |
1081 | #ifdef CONFIG_XFRM | |
1082 | return skb->sp != NULL; | |
1083 | #else | |
1084 | return 0; | |
1085 | #endif | |
1086 | } | |
1087 | ||
1da177e4 LT |
1088 | static inline struct sec_path * |
1089 | secpath_get(struct sec_path *sp) | |
1090 | { | |
1091 | if (sp) | |
55eabed6 | 1092 | refcount_inc(&sp->refcnt); |
1da177e4 LT |
1093 | return sp; |
1094 | } | |
1095 | ||
d511337a | 1096 | void __secpath_destroy(struct sec_path *sp); |
1da177e4 LT |
1097 | |
1098 | static inline void | |
1099 | secpath_put(struct sec_path *sp) | |
1100 | { | |
55eabed6 | 1101 | if (sp && refcount_dec_and_test(&sp->refcnt)) |
1da177e4 LT |
1102 | __secpath_destroy(sp); |
1103 | } | |
1104 | ||
d511337a | 1105 | struct sec_path *secpath_dup(struct sec_path *src); |
b0fcee82 | 1106 | int secpath_set(struct sk_buff *skb); |
1da177e4 LT |
1107 | |
1108 | static inline void | |
1109 | secpath_reset(struct sk_buff *skb) | |
1110 | { | |
1111 | #ifdef CONFIG_XFRM | |
1112 | secpath_put(skb->sp); | |
1113 | skb->sp = NULL; | |
1114 | #endif | |
1115 | } | |
1116 | ||
a1e59abf | 1117 | static inline int |
6cc32961 | 1118 | xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) |
a1e59abf PM |
1119 | { |
1120 | switch (family) { | |
1121 | case AF_INET: | |
1122 | return addr->a4 == 0; | |
1123 | case AF_INET6: | |
15e318bd | 1124 | return ipv6_addr_any(&addr->in6); |
a1e59abf PM |
1125 | } |
1126 | return 0; | |
1127 | } | |
1128 | ||
1da177e4 | 1129 | static inline int |
21eddb5c | 1130 | __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1131 | { |
1132 | return (tmpl->saddr.a4 && | |
1133 | tmpl->saddr.a4 != x->props.saddr.a4); | |
1134 | } | |
1135 | ||
1136 | static inline int | |
21eddb5c | 1137 | __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1138 | { |
1139 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
ff88b30c | 1140 | !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); |
1da177e4 LT |
1141 | } |
1142 | ||
1143 | static inline int | |
21eddb5c | 1144 | xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) |
1da177e4 LT |
1145 | { |
1146 | switch (family) { | |
1147 | case AF_INET: | |
1148 | return __xfrm4_state_addr_cmp(tmpl, x); | |
1149 | case AF_INET6: | |
1150 | return __xfrm6_state_addr_cmp(tmpl, x); | |
1151 | } | |
1152 | return !0; | |
1153 | } | |
1154 | ||
1155 | #ifdef CONFIG_XFRM | |
d511337a JP |
1156 | int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, |
1157 | unsigned short family); | |
1da177e4 | 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 HX |
1164 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
1165 | ||
1da177e4 | 1166 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
d5422efe | 1167 | return __xfrm_policy_check(sk, ndir, skb, family); |
4e81bb83 | 1168 | |
f6e1e25d | 1169 | return (!net->xfrm.policy_count[dir] && !skb->sp) || |
adf30907 | 1170 | (skb_dst(skb)->flags & DST_NOPOLICY) || |
d5422efe HX |
1171 | __xfrm_policy_check(sk, ndir, skb, family); |
1172 | } | |
1173 | ||
1174 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1175 | { | |
1176 | return __xfrm_policy_check2(sk, dir, skb, family, 0); | |
1da177e4 LT |
1177 | } |
1178 | ||
1179 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1180 | { | |
1181 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
1182 | } | |
1183 | ||
1184 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1185 | { | |
1186 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
1187 | } | |
1188 | ||
d5422efe HX |
1189 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1190 | struct sk_buff *skb) | |
1191 | { | |
1192 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); | |
1193 | } | |
1194 | ||
1195 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1196 | struct sk_buff *skb) | |
1197 | { | |
1198 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); | |
1199 | } | |
1200 | ||
d511337a JP |
1201 | int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, |
1202 | unsigned int family, int reverse); | |
d5422efe HX |
1203 | |
1204 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1205 | unsigned int family) | |
1206 | { | |
1207 | return __xfrm_decode_session(skb, fl, family, 0); | |
1208 | } | |
1209 | ||
1210 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, | |
1211 | struct flowi *fl, | |
1212 | unsigned int family) | |
1213 | { | |
1214 | return __xfrm_decode_session(skb, fl, family, 1); | |
1215 | } | |
1216 | ||
d511337a | 1217 | int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
1da177e4 LT |
1218 | |
1219 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
1220 | { | |
99a66657 AD |
1221 | struct net *net = dev_net(skb->dev); |
1222 | ||
1223 | return !net->xfrm.policy_count[XFRM_POLICY_OUT] || | |
adf30907 | 1224 | (skb_dst(skb)->flags & DST_NOXFRM) || |
1da177e4 LT |
1225 | __xfrm_route_forward(skb, family); |
1226 | } | |
1227 | ||
1228 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
1229 | { | |
1230 | return xfrm_route_forward(skb, AF_INET); | |
1231 | } | |
1232 | ||
1233 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
1234 | { | |
1235 | return xfrm_route_forward(skb, AF_INET6); | |
1236 | } | |
1237 | ||
d188ba86 | 1238 | int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk); |
1da177e4 | 1239 | |
d188ba86 | 1240 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) |
1da177e4 | 1241 | { |
d188ba86 ED |
1242 | sk->sk_policy[0] = NULL; |
1243 | sk->sk_policy[1] = NULL; | |
1244 | if (unlikely(osk->sk_policy[0] || osk->sk_policy[1])) | |
1245 | return __xfrm_sk_clone_policy(sk, osk); | |
1da177e4 LT |
1246 | return 0; |
1247 | } | |
1248 | ||
d511337a | 1249 | int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
1250 | |
1251 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
1252 | { | |
d188ba86 ED |
1253 | struct xfrm_policy *pol; |
1254 | ||
1255 | pol = rcu_dereference_protected(sk->sk_policy[0], 1); | |
1256 | if (unlikely(pol != NULL)) { | |
1257 | xfrm_policy_delete(pol, XFRM_POLICY_MAX); | |
1da177e4 LT |
1258 | sk->sk_policy[0] = NULL; |
1259 | } | |
d188ba86 ED |
1260 | pol = rcu_dereference_protected(sk->sk_policy[1], 1); |
1261 | if (unlikely(pol != NULL)) { | |
1262 | xfrm_policy_delete(pol, XFRM_POLICY_MAX+1); | |
1da177e4 LT |
1263 | sk->sk_policy[1] = NULL; |
1264 | } | |
1265 | } | |
1266 | ||
1267 | #else | |
1268 | ||
1269 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
d188ba86 | 1270 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; } |
82695b30 SH |
1271 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } |
1272 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
1da177e4 | 1273 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
82695b30 SH |
1274 | { |
1275 | return 1; | |
1276 | } | |
1da177e4 LT |
1277 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
1278 | { | |
1279 | return 1; | |
1280 | } | |
1281 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1282 | { | |
1283 | return 1; | |
1284 | } | |
d5422efe HX |
1285 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
1286 | struct flowi *fl, | |
1287 | unsigned int family) | |
1288 | { | |
1289 | return -ENOSYS; | |
1290 | } | |
1291 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, | |
1292 | struct sk_buff *skb) | |
1293 | { | |
1294 | return 1; | |
1295 | } | |
1296 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1297 | struct sk_buff *skb) | |
1298 | { | |
1299 | return 1; | |
1300 | } | |
1da177e4 LT |
1301 | #endif |
1302 | ||
1303 | static __inline__ | |
e8a4e377 | 1304 | xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1305 | { |
1306 | switch (family){ | |
1307 | case AF_INET: | |
7e1dc7b6 | 1308 | return (xfrm_address_t *)&fl->u.ip4.daddr; |
1da177e4 | 1309 | case AF_INET6: |
7e1dc7b6 | 1310 | return (xfrm_address_t *)&fl->u.ip6.daddr; |
1da177e4 LT |
1311 | } |
1312 | return NULL; | |
1313 | } | |
1314 | ||
1315 | static __inline__ | |
e8a4e377 | 1316 | xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1317 | { |
1318 | switch (family){ | |
1319 | case AF_INET: | |
7e1dc7b6 | 1320 | return (xfrm_address_t *)&fl->u.ip4.saddr; |
1da177e4 | 1321 | case AF_INET6: |
7e1dc7b6 | 1322 | return (xfrm_address_t *)&fl->u.ip6.saddr; |
1da177e4 LT |
1323 | } |
1324 | return NULL; | |
1325 | } | |
1326 | ||
9bb182a7 | 1327 | static __inline__ |
e8a4e377 | 1328 | void xfrm_flowi_addr_get(const struct flowi *fl, |
9bb182a7 YH |
1329 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
1330 | unsigned short family) | |
1331 | { | |
1332 | switch(family) { | |
1333 | case AF_INET: | |
7e1dc7b6 DM |
1334 | memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); |
1335 | memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); | |
9bb182a7 YH |
1336 | break; |
1337 | case AF_INET6: | |
15e318bd JB |
1338 | saddr->in6 = fl->u.ip6.saddr; |
1339 | daddr->in6 = fl->u.ip6.daddr; | |
9bb182a7 YH |
1340 | break; |
1341 | } | |
1342 | } | |
1343 | ||
1da177e4 | 1344 | static __inline__ int |
f8848067 DM |
1345 | __xfrm4_state_addr_check(const struct xfrm_state *x, |
1346 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 LT |
1347 | { |
1348 | if (daddr->a4 == x->id.daddr.a4 && | |
1349 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
1350 | return 1; | |
1351 | return 0; | |
1352 | } | |
1353 | ||
1354 | static __inline__ int | |
f8848067 DM |
1355 | __xfrm6_state_addr_check(const struct xfrm_state *x, |
1356 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 | 1357 | { |
ff88b30c YH |
1358 | if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && |
1359 | (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || | |
82695b30 | 1360 | ipv6_addr_any((struct in6_addr *)saddr) || |
1da177e4 LT |
1361 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) |
1362 | return 1; | |
1363 | return 0; | |
1364 | } | |
1365 | ||
1366 | static __inline__ int | |
f8848067 DM |
1367 | xfrm_state_addr_check(const struct xfrm_state *x, |
1368 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, | |
1da177e4 LT |
1369 | unsigned short family) |
1370 | { | |
1371 | switch (family) { | |
1372 | case AF_INET: | |
1373 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
1374 | case AF_INET6: | |
1375 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
1376 | } | |
1377 | return 0; | |
1378 | } | |
1379 | ||
e53820de | 1380 | static __inline__ int |
f8848067 | 1381 | xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, |
e53820de MN |
1382 | unsigned short family) |
1383 | { | |
1384 | switch (family) { | |
1385 | case AF_INET: | |
1386 | return __xfrm4_state_addr_check(x, | |
7e1dc7b6 DM |
1387 | (const xfrm_address_t *)&fl->u.ip4.daddr, |
1388 | (const xfrm_address_t *)&fl->u.ip4.saddr); | |
e53820de MN |
1389 | case AF_INET6: |
1390 | return __xfrm6_state_addr_check(x, | |
7e1dc7b6 DM |
1391 | (const xfrm_address_t *)&fl->u.ip6.daddr, |
1392 | (const xfrm_address_t *)&fl->u.ip6.saddr); | |
e53820de MN |
1393 | } |
1394 | return 0; | |
1395 | } | |
1396 | ||
f8848067 | 1397 | static inline int xfrm_state_kern(const struct xfrm_state *x) |
1da177e4 LT |
1398 | { |
1399 | return atomic_read(&x->tunnel_users); | |
1400 | } | |
1401 | ||
5794708f MN |
1402 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1403 | { | |
dc00a525 MN |
1404 | return (!userproto || proto == userproto || |
1405 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
1406 | proto == IPPROTO_ESP || | |
1407 | proto == IPPROTO_COMP))); | |
5794708f MN |
1408 | } |
1409 | ||
1da177e4 LT |
1410 | /* |
1411 | * xfrm algorithm information | |
1412 | */ | |
1a6509d9 | 1413 | struct xfrm_algo_aead_info { |
165ecc63 | 1414 | char *geniv; |
1a6509d9 HX |
1415 | u16 icv_truncbits; |
1416 | }; | |
1417 | ||
1da177e4 LT |
1418 | struct xfrm_algo_auth_info { |
1419 | u16 icv_truncbits; | |
1420 | u16 icv_fullbits; | |
1421 | }; | |
1422 | ||
1423 | struct xfrm_algo_encr_info { | |
165ecc63 | 1424 | char *geniv; |
1da177e4 LT |
1425 | u16 blockbits; |
1426 | u16 defkeybits; | |
1427 | }; | |
1428 | ||
1429 | struct xfrm_algo_comp_info { | |
1430 | u16 threshold; | |
1431 | }; | |
1432 | ||
1433 | struct xfrm_algo_desc { | |
1434 | char *name; | |
04ff1260 | 1435 | char *compat; |
1da177e4 | 1436 | u8 available:1; |
7e50f84c | 1437 | u8 pfkey_supported:1; |
1da177e4 | 1438 | union { |
1a6509d9 | 1439 | struct xfrm_algo_aead_info aead; |
1da177e4 LT |
1440 | struct xfrm_algo_auth_info auth; |
1441 | struct xfrm_algo_encr_info encr; | |
1442 | struct xfrm_algo_comp_info comp; | |
1443 | } uinfo; | |
1444 | struct sadb_alg desc; | |
1445 | }; | |
1446 | ||
3328715e SK |
1447 | /* XFRM protocol handlers. */ |
1448 | struct xfrm4_protocol { | |
1449 | int (*handler)(struct sk_buff *skb); | |
1450 | int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1451 | int encap_type); | |
1452 | int (*cb_handler)(struct sk_buff *skb, int err); | |
1453 | int (*err_handler)(struct sk_buff *skb, u32 info); | |
1454 | ||
1455 | struct xfrm4_protocol __rcu *next; | |
1456 | int priority; | |
1457 | }; | |
1458 | ||
7e14ea15 | 1459 | struct xfrm6_protocol { |
1da177e4 | 1460 | int (*handler)(struct sk_buff *skb); |
7e14ea15 SK |
1461 | int (*cb_handler)(struct sk_buff *skb, int err); |
1462 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
1463 | u8 type, u8 code, int offset, __be32 info); | |
d2acc347 | 1464 | |
7e14ea15 | 1465 | struct xfrm6_protocol __rcu *next; |
d2acc347 | 1466 | int priority; |
1da177e4 LT |
1467 | }; |
1468 | ||
1da177e4 LT |
1469 | /* XFRM tunnel handlers. */ |
1470 | struct xfrm_tunnel { | |
aba82695 | 1471 | int (*handler)(struct sk_buff *skb); |
a6337463 | 1472 | int (*err_handler)(struct sk_buff *skb, u32 info); |
d2acc347 | 1473 | |
b33eab08 | 1474 | struct xfrm_tunnel __rcu *next; |
aba82695 FD |
1475 | int priority; |
1476 | }; | |
1477 | ||
1da177e4 | 1478 | struct xfrm6_tunnel { |
d2acc347 HX |
1479 | int (*handler)(struct sk_buff *skb); |
1480 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
d5fdd6ba | 1481 | u8 type, u8 code, int offset, __be32 info); |
6f0bcf15 | 1482 | struct xfrm6_tunnel __rcu *next; |
d2acc347 | 1483 | int priority; |
1da177e4 LT |
1484 | }; |
1485 | ||
d511337a JP |
1486 | void xfrm_init(void); |
1487 | void xfrm4_init(void); | |
1488 | int xfrm_state_init(struct net *net); | |
1489 | void xfrm_state_fini(struct net *net); | |
1490 | void xfrm4_state_init(void); | |
2f32b51b | 1491 | void xfrm4_protocol_init(void); |
c35b7e72 | 1492 | #ifdef CONFIG_XFRM |
d511337a JP |
1493 | int xfrm6_init(void); |
1494 | void xfrm6_fini(void); | |
1495 | int xfrm6_state_init(void); | |
1496 | void xfrm6_state_fini(void); | |
7e14ea15 SK |
1497 | int xfrm6_protocol_init(void); |
1498 | void xfrm6_protocol_fini(void); | |
c35b7e72 DL |
1499 | #else |
1500 | static inline int xfrm6_init(void) | |
1501 | { | |
1502 | return 0; | |
1503 | } | |
1504 | static inline void xfrm6_fini(void) | |
1505 | { | |
1506 | ; | |
1507 | } | |
1508 | #endif | |
1da177e4 | 1509 | |
558f82ef | 1510 | #ifdef CONFIG_XFRM_STATISTICS |
d511337a JP |
1511 | int xfrm_proc_init(struct net *net); |
1512 | void xfrm_proc_fini(struct net *net); | |
558f82ef MN |
1513 | #endif |
1514 | ||
d511337a | 1515 | int xfrm_sysctl_init(struct net *net); |
b27aeadb | 1516 | #ifdef CONFIG_SYSCTL |
d511337a | 1517 | void xfrm_sysctl_fini(struct net *net); |
b27aeadb AD |
1518 | #else |
1519 | static inline void xfrm_sysctl_fini(struct net *net) | |
1520 | { | |
1521 | } | |
1522 | #endif | |
1523 | ||
d3623099 | 1524 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
870a2df4 | 1525 | struct xfrm_address_filter *filter); |
d511337a JP |
1526 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
1527 | int (*func)(struct xfrm_state *, int, void*), void *); | |
283bc9f3 | 1528 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); |
d511337a JP |
1529 | struct xfrm_state *xfrm_state_alloc(struct net *net); |
1530 | struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, | |
1531 | const xfrm_address_t *saddr, | |
1532 | const struct flowi *fl, | |
1533 | struct xfrm_tmpl *tmpl, | |
1534 | struct xfrm_policy *pol, int *err, | |
1535 | unsigned short family); | |
1536 | struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, | |
1537 | xfrm_address_t *daddr, | |
1538 | xfrm_address_t *saddr, | |
1539 | unsigned short family, | |
1540 | u8 mode, u8 proto, u32 reqid); | |
c454997e FD |
1541 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
1542 | unsigned short family); | |
d511337a JP |
1543 | int xfrm_state_check_expire(struct xfrm_state *x); |
1544 | void xfrm_state_insert(struct xfrm_state *x); | |
1545 | int xfrm_state_add(struct xfrm_state *x); | |
1546 | int xfrm_state_update(struct xfrm_state *x); | |
1547 | struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, | |
1548 | const xfrm_address_t *daddr, __be32 spi, | |
1549 | u8 proto, unsigned short family); | |
1550 | struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, | |
1551 | const xfrm_address_t *daddr, | |
1552 | const xfrm_address_t *saddr, | |
1553 | u8 proto, | |
1554 | unsigned short family); | |
41a49cc3 | 1555 | #ifdef CONFIG_XFRM_SUB_POLICY |
d511337a | 1556 | int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, |
283bc9f3 | 1557 | unsigned short family, struct net *net); |
d511337a JP |
1558 | int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, |
1559 | unsigned short family); | |
41a49cc3 MN |
1560 | #else |
1561 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
283bc9f3 | 1562 | int n, unsigned short family, struct net *net) |
41a49cc3 MN |
1563 | { |
1564 | return -ENOSYS; | |
1565 | } | |
1566 | ||
1567 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1568 | int n, unsigned short family) | |
1569 | { | |
1570 | return -ENOSYS; | |
1571 | } | |
1572 | #endif | |
af11e316 JHS |
1573 | |
1574 | struct xfrmk_sadinfo { | |
1575 | u32 sadhcnt; /* current hash bkts */ | |
1576 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1577 | u32 sadcnt; /* current running count */ | |
1578 | }; | |
1579 | ||
5a6d3416 JHS |
1580 | struct xfrmk_spdinfo { |
1581 | u32 incnt; | |
1582 | u32 outcnt; | |
1583 | u32 fwdcnt; | |
1584 | u32 inscnt; | |
1585 | u32 outscnt; | |
1586 | u32 fwdscnt; | |
1587 | u32 spdhcnt; | |
1588 | u32 spdhmcnt; | |
1589 | }; | |
1590 | ||
d511337a JP |
1591 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1592 | int xfrm_state_delete(struct xfrm_state *x); | |
2e71029e | 1593 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid); |
d77e38e6 | 1594 | int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid); |
d511337a JP |
1595 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); |
1596 | void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); | |
1597 | u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); | |
1598 | int xfrm_init_replay(struct xfrm_state *x); | |
1599 | int xfrm_state_mtu(struct xfrm_state *x, int mtu); | |
ffdb5211 | 1600 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload); |
d511337a JP |
1601 | int xfrm_init_state(struct xfrm_state *x); |
1602 | int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); | |
1603 | int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); | |
1604 | int xfrm_input_resume(struct sk_buff *skb, int nexthdr); | |
acf568ee HX |
1605 | int xfrm_trans_queue(struct sk_buff *skb, |
1606 | int (*finish)(struct net *, struct sock *, | |
1607 | struct sk_buff *)); | |
d511337a | 1608 | int xfrm_output_resume(struct sk_buff *skb, int err); |
7026b1dd | 1609 | int xfrm_output(struct sock *sk, struct sk_buff *skb); |
d511337a JP |
1610 | int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1611 | void xfrm_local_error(struct sk_buff *skb, int mtu); | |
1612 | int xfrm4_extract_header(struct sk_buff *skb); | |
1613 | int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); | |
1614 | int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1615 | int encap_type); | |
1616 | int xfrm4_transport_finish(struct sk_buff *skb, int async); | |
1617 | int xfrm4_rcv(struct sk_buff *skb); | |
1e295370 | 1618 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); |
c4541b41 HX |
1619 | |
1620 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1621 | { | |
70be6c91 | 1622 | XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; |
3328715e SK |
1623 | XFRM_SPI_SKB_CB(skb)->family = AF_INET; |
1624 | XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); | |
1625 | return xfrm_input(skb, nexthdr, spi, 0); | |
c4541b41 HX |
1626 | } |
1627 | ||
d511337a JP |
1628 | int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1629 | int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
ede2059d | 1630 | int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
7026b1dd | 1631 | int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb); |
3328715e SK |
1632 | int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err); |
1633 | int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); | |
1634 | int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol); | |
d511337a JP |
1635 | int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1636 | int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
d511337a JP |
1637 | void xfrm4_local_error(struct sk_buff *skb, u32 mtu); |
1638 | int xfrm6_extract_header(struct sk_buff *skb); | |
1639 | int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); | |
63c43787 ND |
1640 | int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi, |
1641 | struct ip6_tnl *t); | |
d511337a | 1642 | int xfrm6_transport_finish(struct sk_buff *skb, int async); |
63c43787 | 1643 | int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t); |
d511337a JP |
1644 | int xfrm6_rcv(struct sk_buff *skb); |
1645 | int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, | |
1646 | xfrm_address_t *saddr, u8 proto); | |
7b77d161 | 1647 | void xfrm6_local_error(struct sk_buff *skb, u32 mtu); |
7e14ea15 SK |
1648 | int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err); |
1649 | int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol); | |
1650 | int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol); | |
d511337a | 1651 | int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
7b77d161 | 1652 | int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); |
d511337a JP |
1653 | __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
1654 | __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); | |
1655 | int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); | |
1656 | int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
ede2059d | 1657 | int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
7026b1dd | 1658 | int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb); |
d511337a JP |
1659 | int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
1660 | u8 **prevhdr); | |
1da177e4 LT |
1661 | |
1662 | #ifdef CONFIG_XFRM | |
d511337a JP |
1663 | int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1664 | int xfrm_user_policy(struct sock *sk, int optname, | |
1665 | u8 __user *optval, int optlen); | |
1da177e4 LT |
1666 | #else |
1667 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1668 | { | |
1669 | return -ENOPROTOOPT; | |
82695b30 | 1670 | } |
1da177e4 | 1671 | |
067b207b | 1672 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
1673 | { |
1674 | /* should not happen */ | |
1675 | kfree_skb(skb); | |
1676 | return 0; | |
1677 | } | |
1da177e4 LT |
1678 | #endif |
1679 | ||
d77e38e6 SK |
1680 | struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif, |
1681 | const xfrm_address_t *saddr, | |
1682 | const xfrm_address_t *daddr, | |
077fbac4 | 1683 | int family, u32 mark); |
d77e38e6 | 1684 | |
0331b1f3 | 1685 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
4c563f76 | 1686 | |
d511337a JP |
1687 | void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
1688 | int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, | |
1689 | int (*func)(struct xfrm_policy *, int, int, void*), | |
1690 | void *); | |
283bc9f3 | 1691 | void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); |
1da177e4 | 1692 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
8ca2e93b JHS |
1693 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, |
1694 | u8 type, int dir, | |
4e81bb83 | 1695 | struct xfrm_selector *sel, |
ef41aaa0 EP |
1696 | struct xfrm_sec_ctx *ctx, int delete, |
1697 | int *err); | |
d511337a JP |
1698 | struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, |
1699 | u32 id, int delete, int *err); | |
2e71029e | 1700 | int xfrm_policy_flush(struct net *net, u8 type, bool task_valid); |
880a6fab | 1701 | void xfrm_policy_hash_rebuild(struct net *net); |
1da177e4 | 1702 | u32 xfrm_get_acqseq(void); |
776e9dd9 | 1703 | int verify_spi_info(u8 proto, u32 min, u32 max); |
d511337a | 1704 | int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
e473fcb4 | 1705 | struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, |
bd55775c | 1706 | u8 mode, u32 reqid, u8 proto, |
a70486f0 DM |
1707 | const xfrm_address_t *daddr, |
1708 | const xfrm_address_t *saddr, int create, | |
bd55775c | 1709 | unsigned short family); |
d511337a | 1710 | int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
1da177e4 | 1711 | |
80c9abaa | 1712 | #ifdef CONFIG_XFRM_MIGRATE |
d511337a JP |
1713 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1714 | const struct xfrm_migrate *m, int num_bundles, | |
8bafd730 AA |
1715 | const struct xfrm_kmaddress *k, |
1716 | const struct xfrm_encap_tmpl *encap); | |
283bc9f3 | 1717 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net); |
d511337a | 1718 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
4ab47d47 AA |
1719 | struct xfrm_migrate *m, |
1720 | struct xfrm_encap_tmpl *encap); | |
d511337a JP |
1721 | int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1722 | struct xfrm_migrate *m, int num_bundles, | |
4ab47d47 AA |
1723 | struct xfrm_kmaddress *k, struct net *net, |
1724 | struct xfrm_encap_tmpl *encap); | |
80c9abaa SS |
1725 | #endif |
1726 | ||
d511337a JP |
1727 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
1728 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); | |
1729 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, | |
1730 | xfrm_address_t *addr); | |
1731 | ||
1732 | void xfrm_input_init(void); | |
1733 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); | |
1734 | ||
1735 | void xfrm_probe_algs(void); | |
1736 | int xfrm_count_pfkey_auth_supported(void); | |
1737 | int xfrm_count_pfkey_enc_supported(void); | |
1738 | struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1739 | struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1740 | struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1741 | struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1742 | struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1743 | struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); | |
1744 | struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); | |
1745 | struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); | |
1746 | struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, | |
1747 | int probe); | |
1da177e4 | 1748 | |
70e94e66 YH |
1749 | static inline bool xfrm6_addr_equal(const xfrm_address_t *a, |
1750 | const xfrm_address_t *b) | |
1751 | { | |
1752 | return ipv6_addr_equal((const struct in6_addr *)a, | |
1753 | (const struct in6_addr *)b); | |
1754 | } | |
1755 | ||
1756 | static inline bool xfrm_addr_equal(const xfrm_address_t *a, | |
1757 | const xfrm_address_t *b, | |
1758 | sa_family_t family) | |
1da177e4 LT |
1759 | { |
1760 | switch (family) { | |
1761 | default: | |
1762 | case AF_INET: | |
70e94e66 | 1763 | return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; |
1da177e4 | 1764 | case AF_INET6: |
70e94e66 | 1765 | return xfrm6_addr_equal(a, b); |
1da177e4 LT |
1766 | } |
1767 | } | |
1768 | ||
77d8d7a6 HX |
1769 | static inline int xfrm_policy_id2dir(u32 index) |
1770 | { | |
1771 | return index & 7; | |
1772 | } | |
1773 | ||
a6483b79 AD |
1774 | #ifdef CONFIG_XFRM |
1775 | static inline int xfrm_aevent_is_on(struct net *net) | |
f8cd5488 | 1776 | { |
be33690d PM |
1777 | struct sock *nlsk; |
1778 | int ret = 0; | |
1779 | ||
1780 | rcu_read_lock(); | |
a6483b79 | 1781 | nlsk = rcu_dereference(net->xfrm.nlsk); |
be33690d PM |
1782 | if (nlsk) |
1783 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1784 | rcu_read_unlock(); | |
1785 | return ret; | |
f8cd5488 | 1786 | } |
0f24558e HG |
1787 | |
1788 | static inline int xfrm_acquire_is_on(struct net *net) | |
1789 | { | |
1790 | struct sock *nlsk; | |
1791 | int ret = 0; | |
1792 | ||
1793 | rcu_read_lock(); | |
1794 | nlsk = rcu_dereference(net->xfrm.nlsk); | |
1795 | if (nlsk) | |
1796 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE); | |
1797 | rcu_read_unlock(); | |
1798 | ||
1799 | return ret; | |
1800 | } | |
a6483b79 | 1801 | #endif |
f8cd5488 | 1802 | |
373b8eeb | 1803 | static inline unsigned int aead_len(struct xfrm_algo_aead *alg) |
ee5c2317 SK |
1804 | { |
1805 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1806 | } | |
1807 | ||
06cd22f8 | 1808 | static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg) |
0f99be0d ED |
1809 | { |
1810 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1811 | } | |
1812 | ||
1bd963a7 | 1813 | static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) |
4447bb33 MW |
1814 | { |
1815 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1816 | } | |
1817 | ||
5e708e47 | 1818 | static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) |
9736acf3 SK |
1819 | { |
1820 | return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); | |
1821 | } | |
1822 | ||
80c9abaa | 1823 | #ifdef CONFIG_XFRM_MIGRATE |
af2f464e SK |
1824 | static inline int xfrm_replay_clone(struct xfrm_state *x, |
1825 | struct xfrm_state *orig) | |
1826 | { | |
1827 | x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), | |
1828 | GFP_KERNEL); | |
1829 | if (!x->replay_esn) | |
1830 | return -ENOMEM; | |
1831 | ||
1832 | x->replay_esn->bmp_len = orig->replay_esn->bmp_len; | |
1833 | x->replay_esn->replay_window = orig->replay_esn->replay_window; | |
1834 | ||
1835 | x->preplay_esn = kmemdup(x->replay_esn, | |
1836 | xfrm_replay_state_esn_len(x->replay_esn), | |
1837 | GFP_KERNEL); | |
1838 | if (!x->preplay_esn) { | |
1839 | kfree(x->replay_esn); | |
1840 | return -ENOMEM; | |
1841 | } | |
1842 | ||
1843 | return 0; | |
1844 | } | |
1845 | ||
ee5c2317 SK |
1846 | static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig) |
1847 | { | |
1848 | return kmemdup(orig, aead_len(orig), GFP_KERNEL); | |
1849 | } | |
1850 | ||
1851 | ||
80c9abaa SS |
1852 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
1853 | { | |
0f99be0d | 1854 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
80c9abaa SS |
1855 | } |
1856 | ||
4447bb33 MW |
1857 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
1858 | { | |
1859 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); | |
1860 | } | |
1861 | ||
80c9abaa SS |
1862 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
1863 | { | |
1864 | int i; | |
1865 | for (i = 0; i < n; i++) | |
1866 | xfrm_state_put(*(states + i)); | |
1867 | } | |
1868 | ||
1869 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1870 | { | |
1871 | int i; | |
1872 | for (i = 0; i < n; i++) | |
1873 | xfrm_state_delete(*(states + i)); | |
1874 | } | |
1875 | #endif | |
f8cd5488 | 1876 | |
def8b4fa | 1877 | #ifdef CONFIG_XFRM |
00501121 HX |
1878 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
1879 | { | |
1880 | return skb->sp->xvec[skb->sp->len - 1]; | |
1881 | } | |
f53c7239 SK |
1882 | #endif |
1883 | ||
54ef207a SK |
1884 | static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb) |
1885 | { | |
f53c7239 | 1886 | #ifdef CONFIG_XFRM |
54ef207a SK |
1887 | struct sec_path *sp = skb->sp; |
1888 | ||
1889 | if (!sp || !sp->olen || sp->len != sp->olen) | |
1890 | return NULL; | |
1891 | ||
1892 | return &sp->ovec[sp->olen - 1]; | |
f53c7239 SK |
1893 | #else |
1894 | return NULL; | |
def8b4fa | 1895 | #endif |
f53c7239 | 1896 | } |
00501121 | 1897 | |
e9a441b6 | 1898 | void __init xfrm_dev_init(void); |
b81f884a HL |
1899 | |
1900 | #ifdef CONFIG_XFRM_OFFLOAD | |
f53c7239 SK |
1901 | void xfrm_dev_resume(struct sk_buff *skb); |
1902 | void xfrm_dev_backlog(struct softnet_data *sd); | |
1903 | struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again); | |
d77e38e6 SK |
1904 | int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, |
1905 | struct xfrm_user_offload *xuo); | |
1906 | bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x); | |
1907 | ||
50bd870a YE |
1908 | static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x) |
1909 | { | |
1910 | struct xfrm_state_offload *xso = &x->xso; | |
1911 | ||
1912 | if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn) | |
1913 | xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x); | |
1914 | } | |
1915 | ||
f70f250a SK |
1916 | static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) |
1917 | { | |
1918 | struct xfrm_state *x = dst->xfrm; | |
b6ca8bd5 | 1919 | struct xfrm_dst *xdst; |
f70f250a SK |
1920 | |
1921 | if (!x || !x->type_offload) | |
1922 | return false; | |
1923 | ||
b6ca8bd5 | 1924 | xdst = (struct xfrm_dst *) dst; |
2271d519 SK |
1925 | if (!x->xso.offload_handle && !xdst->child->xfrm) |
1926 | return true; | |
0f6c480f | 1927 | if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) && |
b6ca8bd5 | 1928 | !xdst->child->xfrm) |
f70f250a SK |
1929 | return true; |
1930 | ||
1931 | return false; | |
1932 | } | |
1933 | ||
d77e38e6 SK |
1934 | static inline void xfrm_dev_state_delete(struct xfrm_state *x) |
1935 | { | |
1936 | struct xfrm_state_offload *xso = &x->xso; | |
1937 | ||
1938 | if (xso->dev) | |
1939 | xso->dev->xfrmdev_ops->xdo_dev_state_delete(x); | |
1940 | } | |
1941 | ||
1942 | static inline void xfrm_dev_state_free(struct xfrm_state *x) | |
1943 | { | |
1944 | struct xfrm_state_offload *xso = &x->xso; | |
1945 | struct net_device *dev = xso->dev; | |
1946 | ||
1947 | if (dev && dev->xfrmdev_ops) { | |
7f05b467 SN |
1948 | if (dev->xfrmdev_ops->xdo_dev_state_free) |
1949 | dev->xfrmdev_ops->xdo_dev_state_free(x); | |
d77e38e6 SK |
1950 | xso->dev = NULL; |
1951 | dev_put(dev); | |
1952 | } | |
1953 | } | |
1954 | #else | |
f53c7239 SK |
1955 | static inline void xfrm_dev_resume(struct sk_buff *skb) |
1956 | { | |
1957 | } | |
1958 | ||
1959 | static inline void xfrm_dev_backlog(struct softnet_data *sd) | |
1960 | { | |
1961 | } | |
1962 | ||
1963 | static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again) | |
f6e27114 | 1964 | { |
3dca3f38 | 1965 | return skb; |
f6e27114 SK |
1966 | } |
1967 | ||
d77e38e6 SK |
1968 | static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo) |
1969 | { | |
1970 | return 0; | |
1971 | } | |
1972 | ||
1973 | static inline void xfrm_dev_state_delete(struct xfrm_state *x) | |
1974 | { | |
1975 | } | |
1976 | ||
1977 | static inline void xfrm_dev_state_free(struct xfrm_state *x) | |
1978 | { | |
1979 | } | |
1980 | ||
1981 | static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x) | |
1982 | { | |
1983 | return false; | |
1984 | } | |
f70f250a | 1985 | |
50bd870a YE |
1986 | static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x) |
1987 | { | |
1988 | } | |
1989 | ||
f70f250a SK |
1990 | static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) |
1991 | { | |
1992 | return false; | |
1993 | } | |
d77e38e6 SK |
1994 | #endif |
1995 | ||
bf825f81 JHS |
1996 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
1997 | { | |
1998 | if (attrs[XFRMA_MARK]) | |
4efd7e83 | 1999 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
bf825f81 JHS |
2000 | else |
2001 | m->v = m->m = 0; | |
2002 | ||
2003 | return m->v & m->m; | |
2004 | } | |
2005 | ||
e3dfa389 | 2006 | static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) |
bf825f81 | 2007 | { |
1d1e34dd | 2008 | int ret = 0; |
bf825f81 | 2009 | |
1d1e34dd DM |
2010 | if (m->m | m->v) |
2011 | ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); | |
2012 | return ret; | |
bf825f81 JHS |
2013 | } |
2014 | ||
70be6c91 SK |
2015 | static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, |
2016 | unsigned int family) | |
2017 | { | |
2018 | bool tunnel = false; | |
2019 | ||
2020 | switch(family) { | |
2021 | case AF_INET: | |
2022 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) | |
2023 | tunnel = true; | |
2024 | break; | |
2025 | case AF_INET6: | |
2026 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) | |
2027 | tunnel = true; | |
2028 | break; | |
2029 | } | |
2030 | if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL)) | |
2031 | return -EINVAL; | |
2032 | ||
2033 | return 0; | |
2034 | } | |
1da177e4 | 2035 | #endif /* _NET_XFRM_H */ |