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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> |
f203b76d | 26 | #include <net/gro_cells.h> |
9e0d57fd YP |
27 | |
28 | #include <linux/interrupt.h> | |
29 | ||
558f82ef MN |
30 | #ifdef CONFIG_XFRM_STATISTICS |
31 | #include <net/snmp.h> | |
32 | #endif | |
1da177e4 | 33 | |
d3d6dd3a MN |
34 | #define XFRM_PROTO_ESP 50 |
35 | #define XFRM_PROTO_AH 51 | |
36 | #define XFRM_PROTO_COMP 108 | |
37 | #define XFRM_PROTO_IPIP 4 | |
38 | #define XFRM_PROTO_IPV6 41 | |
39 | #define XFRM_PROTO_ROUTING IPPROTO_ROUTING | |
40 | #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS | |
41 | ||
fa9921e4 | 42 | #define XFRM_ALIGN4(len) (((len) + 3) & ~3) |
1da177e4 | 43 | #define XFRM_ALIGN8(len) (((len) + 7) & ~7) |
b59f45d0 HX |
44 | #define MODULE_ALIAS_XFRM_MODE(family, encap) \ |
45 | MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) | |
d3d6dd3a MN |
46 | #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ |
47 | MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) | |
ffdb5211 IT |
48 | #define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \ |
49 | MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto)) | |
1da177e4 | 50 | |
558f82ef | 51 | #ifdef CONFIG_XFRM_STATISTICS |
59c9940e | 52 | #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) |
558f82ef | 53 | #else |
59c9940e | 54 | #define XFRM_INC_STATS(net, field) ((void)(net)) |
558f82ef MN |
55 | #endif |
56 | ||
1da177e4 LT |
57 | |
58 | /* Organization of SPD aka "XFRM rules" | |
59 | ------------------------------------ | |
60 | ||
61 | Basic objects: | |
62 | - policy rule, struct xfrm_policy (=SPD entry) | |
63 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) | |
64 | - instance of a transformer, struct xfrm_state (=SA) | |
65 | - template to clone xfrm_state, struct xfrm_tmpl | |
66 | ||
67 | SPD is plain linear list of xfrm_policy rules, ordered by priority. | |
68 | (To be compatible with existing pfkeyv2 implementations, | |
69 | many rules with priority of 0x7fffffff are allowed to exist and | |
70 | such rules are ordered in an unpredictable way, thanks to bsd folks.) | |
71 | ||
72 | Lookup is plain linear search until the first match with selector. | |
73 | ||
74 | If "action" is "block", then we prohibit the flow, otherwise: | |
75 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, | |
76 | policy entry has list of up to XFRM_MAX_DEPTH transformations, | |
77 | described by templates xfrm_tmpl. Each template is resolved | |
78 | to a complete xfrm_state (see below) and we pack bundle of transformations | |
79 | to a dst_entry returned to requestor. | |
80 | ||
81 | dst -. xfrm .-> xfrm_state #1 | |
82 | |---. child .-> dst -. xfrm .-> xfrm_state #2 | |
83 | |---. child .-> dst -. xfrm .-> xfrm_state #3 | |
84 | |---. child .-> NULL | |
85 | ||
86 | Bundles are cached at xrfm_policy struct (field ->bundles). | |
87 | ||
88 | ||
89 | Resolution of xrfm_tmpl | |
90 | ----------------------- | |
91 | Template contains: | |
92 | 1. ->mode Mode: transport or tunnel | |
93 | 2. ->id.proto Protocol: AH/ESP/IPCOMP | |
94 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. | |
95 | Q: allow to resolve security gateway? | |
96 | 4. ->id.spi If not zero, static SPI. | |
97 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. | |
98 | 6. ->algos List of allowed algos. Plain bitmask now. | |
99 | Q: ealgos, aalgos, calgos. What a mess... | |
100 | 7. ->share Sharing mode. | |
101 | Q: how to implement private sharing mode? To add struct sock* to | |
102 | flow id? | |
103 | ||
104 | Having this template we search through SAD searching for entries | |
105 | with appropriate mode/proto/algo, permitted by selector. | |
106 | If no appropriate entry found, it is requested from key manager. | |
107 | ||
108 | PROBLEMS: | |
109 | Q: How to find all the bundles referring to a physical path for | |
110 | PMTU discovery? Seems, dst should contain list of all parents... | |
111 | and enter to infinite locking hierarchy disaster. | |
112 | No! It is easier, we will not search for them, let them find us. | |
113 | We add genid to each dst plus pointer to genid of raw IP route, | |
114 | pmtu disc will update pmtu on raw IP route and increase its genid. | |
115 | dst_check() will see this for top level and trigger resyncing | |
116 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. | |
117 | */ | |
118 | ||
12a169e7 HX |
119 | struct xfrm_state_walk { |
120 | struct list_head all; | |
121 | u8 state; | |
d3623099 ND |
122 | u8 dying; |
123 | u8 proto; | |
12a169e7 | 124 | u32 seq; |
870a2df4 | 125 | struct xfrm_address_filter *filter; |
12a169e7 HX |
126 | }; |
127 | ||
d77e38e6 SK |
128 | struct xfrm_state_offload { |
129 | struct net_device *dev; | |
130 | unsigned long offload_handle; | |
131 | unsigned int num_exthdrs; | |
132 | u8 flags; | |
133 | }; | |
134 | ||
1da177e4 | 135 | /* Full description of state of transformer. */ |
fd2c3ef7 | 136 | struct xfrm_state { |
0c5c9fb5 | 137 | possible_net_t xs_net; |
abb81c4f | 138 | union { |
12a169e7 | 139 | struct hlist_node gclist; |
abb81c4f HX |
140 | struct hlist_node bydst; |
141 | }; | |
8f126e37 DM |
142 | struct hlist_node bysrc; |
143 | struct hlist_node byspi; | |
1da177e4 | 144 | |
88755e9c | 145 | refcount_t refcnt; |
1da177e4 LT |
146 | spinlock_t lock; |
147 | ||
148 | struct xfrm_id id; | |
149 | struct xfrm_selector sel; | |
bf825f81 | 150 | struct xfrm_mark mark; |
7e652640 | 151 | u32 if_id; |
35d2856b | 152 | u32 tfcpad; |
1da177e4 | 153 | |
9d4a706d DM |
154 | u32 genid; |
155 | ||
12a169e7 HX |
156 | /* Key manager bits */ |
157 | struct xfrm_state_walk km; | |
1da177e4 LT |
158 | |
159 | /* Parameters of this state. */ | |
160 | struct { | |
161 | u32 reqid; | |
162 | u8 mode; | |
163 | u8 replay_window; | |
164 | u8 aalgo, ealgo, calgo; | |
165 | u8 flags; | |
166 | u16 family; | |
167 | xfrm_address_t saddr; | |
168 | int header_len; | |
169 | int trailer_len; | |
a947b0a9 | 170 | u32 extra_flags; |
9b42c1f1 | 171 | struct xfrm_mark smark; |
1da177e4 LT |
172 | } props; |
173 | ||
174 | struct xfrm_lifetime_cfg lft; | |
175 | ||
176 | /* Data for transformer */ | |
4447bb33 | 177 | struct xfrm_algo_auth *aalg; |
1da177e4 LT |
178 | struct xfrm_algo *ealg; |
179 | struct xfrm_algo *calg; | |
1a6509d9 | 180 | struct xfrm_algo_aead *aead; |
69b0137f | 181 | const char *geniv; |
1da177e4 LT |
182 | |
183 | /* Data for encapsulator */ | |
184 | struct xfrm_encap_tmpl *encap; | |
185 | ||
060f02a3 NT |
186 | /* Data for care-of address */ |
187 | xfrm_address_t *coaddr; | |
188 | ||
1da177e4 LT |
189 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
190 | struct xfrm_state *tunnel; | |
191 | ||
192 | /* If a tunnel, number of users + 1 */ | |
193 | atomic_t tunnel_users; | |
194 | ||
195 | /* State for replay detection */ | |
196 | struct xfrm_replay_state replay; | |
9736acf3 | 197 | struct xfrm_replay_state_esn *replay_esn; |
1da177e4 | 198 | |
f8cd5488 JHS |
199 | /* Replay detection state at the time we sent the last notification */ |
200 | struct xfrm_replay_state preplay; | |
9736acf3 | 201 | struct xfrm_replay_state_esn *preplay_esn; |
f8cd5488 | 202 | |
9fdc4883 | 203 | /* The functions for replay detection. */ |
e45a8a9e | 204 | const struct xfrm_replay *repl; |
9fdc4883 | 205 | |
2717096a JHS |
206 | /* internal flag that only holds state for delayed aevent at the |
207 | * moment | |
208 | */ | |
209 | u32 xflags; | |
210 | ||
f8cd5488 JHS |
211 | /* Replay detection notification settings */ |
212 | u32 replay_maxage; | |
213 | u32 replay_maxdiff; | |
214 | ||
215 | /* Replay detection notification timer */ | |
216 | struct timer_list rtimer; | |
217 | ||
1da177e4 LT |
218 | /* Statistics */ |
219 | struct xfrm_stats stats; | |
220 | ||
221 | struct xfrm_lifetime_cur curlft; | |
9e0d57fd | 222 | struct tasklet_hrtimer mtimer; |
1da177e4 | 223 | |
d77e38e6 SK |
224 | struct xfrm_state_offload xso; |
225 | ||
e3c0d047 FD |
226 | /* used to fix curlft->add_time when changing date */ |
227 | long saved_tmo; | |
228 | ||
9afaca05 | 229 | /* Last used time */ |
03dc7a35 | 230 | time64_t lastused; |
9afaca05 | 231 | |
cac2661c SK |
232 | struct page_frag xfrag; |
233 | ||
1da177e4 LT |
234 | /* Reference to data common to all the instances of this |
235 | * transformer. */ | |
533cb5b0 | 236 | const struct xfrm_type *type; |
13996378 | 237 | struct xfrm_mode *inner_mode; |
df9dcb45 | 238 | struct xfrm_mode *inner_mode_iaf; |
13996378 | 239 | struct xfrm_mode *outer_mode; |
1da177e4 | 240 | |
9d389d7f SK |
241 | const struct xfrm_type_offload *type_offload; |
242 | ||
df71837d TJ |
243 | /* Security context */ |
244 | struct xfrm_sec_ctx *security; | |
245 | ||
1da177e4 LT |
246 | /* Private data of this transformer, format is opaque, |
247 | * interpreted by xfrm_type methods. */ | |
248 | void *data; | |
249 | }; | |
250 | ||
673c09be AD |
251 | static inline struct net *xs_net(struct xfrm_state *x) |
252 | { | |
253 | return read_pnet(&x->xs_net); | |
254 | } | |
255 | ||
2717096a JHS |
256 | /* xflags - make enum if more show up */ |
257 | #define XFRM_TIME_DEFER 1 | |
e3c0d047 | 258 | #define XFRM_SOFT_EXPIRE 2 |
2717096a | 259 | |
1da177e4 LT |
260 | enum { |
261 | XFRM_STATE_VOID, | |
262 | XFRM_STATE_ACQ, | |
263 | XFRM_STATE_VALID, | |
264 | XFRM_STATE_ERROR, | |
265 | XFRM_STATE_EXPIRED, | |
266 | XFRM_STATE_DEAD | |
267 | }; | |
268 | ||
26b15dad | 269 | /* callback structure passed from either netlink or pfkey */ |
fd2c3ef7 | 270 | struct km_event { |
bf08867f HX |
271 | union { |
272 | u32 hard; | |
273 | u32 proto; | |
274 | u32 byid; | |
f8cd5488 | 275 | u32 aevent; |
f7b6983f | 276 | u32 type; |
bf08867f HX |
277 | } data; |
278 | ||
26b15dad | 279 | u32 seq; |
15e47304 | 280 | u32 portid; |
26b15dad | 281 | u32 event; |
7067802e | 282 | struct net *net; |
26b15dad JHS |
283 | }; |
284 | ||
9fdc4883 SK |
285 | struct xfrm_replay { |
286 | void (*advance)(struct xfrm_state *x, __be32 net_seq); | |
287 | int (*check)(struct xfrm_state *x, | |
288 | struct sk_buff *skb, | |
289 | __be32 net_seq); | |
3b59df46 SK |
290 | int (*recheck)(struct xfrm_state *x, |
291 | struct sk_buff *skb, | |
292 | __be32 net_seq); | |
9fdc4883 SK |
293 | void (*notify)(struct xfrm_state *x, int event); |
294 | int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); | |
295 | }; | |
296 | ||
f203b76d SK |
297 | struct xfrm_if_cb { |
298 | struct xfrm_if *(*decode_session)(struct sk_buff *skb); | |
299 | }; | |
300 | ||
301 | void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb); | |
302 | void xfrm_if_unregister_cb(void); | |
303 | ||
25ee3286 | 304 | struct net_device; |
1da177e4 LT |
305 | struct xfrm_type; |
306 | struct xfrm_dst; | |
307 | struct xfrm_policy_afinfo { | |
1da177e4 | 308 | struct dst_ops *dst_ops; |
42a7b32b DA |
309 | struct dst_entry *(*dst_lookup)(struct net *net, |
310 | int tos, int oif, | |
5e6b930f | 311 | const xfrm_address_t *saddr, |
077fbac4 LC |
312 | const xfrm_address_t *daddr, |
313 | u32 mark); | |
42a7b32b DA |
314 | int (*get_saddr)(struct net *net, int oif, |
315 | xfrm_address_t *saddr, | |
077fbac4 LC |
316 | xfrm_address_t *daddr, |
317 | u32 mark); | |
1da177e4 | 318 | void (*decode_session)(struct sk_buff *skb, |
d5422efe HX |
319 | struct flowi *fl, |
320 | int reverse); | |
05d84025 | 321 | int (*get_tos)(const struct flowi *fl); |
a1b05140 MN |
322 | int (*init_path)(struct xfrm_dst *path, |
323 | struct dst_entry *dst, | |
324 | int nfheader_len); | |
25ee3286 | 325 | int (*fill_dst)(struct xfrm_dst *xdst, |
87c1e12b | 326 | struct net_device *dev, |
0c7b3eef | 327 | const struct flowi *fl); |
2774c131 | 328 | struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); |
1da177e4 LT |
329 | }; |
330 | ||
a2817d8b FW |
331 | int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family); |
332 | void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo); | |
d511337a JP |
333 | void km_policy_notify(struct xfrm_policy *xp, int dir, |
334 | const struct km_event *c); | |
335 | void km_state_notify(struct xfrm_state *x, const struct km_event *c); | |
1da177e4 LT |
336 | |
337 | struct xfrm_tmpl; | |
d511337a JP |
338 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, |
339 | struct xfrm_policy *pol); | |
340 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); | |
341 | int __xfrm_state_delete(struct xfrm_state *x); | |
53bc6b4d | 342 | |
1da177e4 | 343 | struct xfrm_state_afinfo { |
9d389d7f SK |
344 | unsigned int family; |
345 | unsigned int proto; | |
346 | __be16 eth_proto; | |
347 | struct module *owner; | |
348 | const struct xfrm_type *type_map[IPPROTO_MAX]; | |
349 | const struct xfrm_type_offload *type_offload_map[IPPROTO_MAX]; | |
350 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; | |
351 | ||
d094cd83 | 352 | int (*init_flags)(struct xfrm_state *x); |
73e5ebb2 DM |
353 | void (*init_tempsel)(struct xfrm_selector *sel, |
354 | const struct flowi *fl); | |
19bd6244 DM |
355 | void (*init_temprop)(struct xfrm_state *x, |
356 | const struct xfrm_tmpl *tmpl, | |
357 | const xfrm_address_t *daddr, | |
358 | const xfrm_address_t *saddr); | |
41a49cc3 MN |
359 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
360 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); | |
ede2059d | 361 | int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb); |
7026b1dd | 362 | int (*output_finish)(struct sock *sk, struct sk_buff *skb); |
227620e2 HX |
363 | int (*extract_input)(struct xfrm_state *x, |
364 | struct sk_buff *skb); | |
36cf9acf HX |
365 | int (*extract_output)(struct xfrm_state *x, |
366 | struct sk_buff *skb); | |
716062fd HX |
367 | int (*transport_finish)(struct sk_buff *skb, |
368 | int async); | |
628e341f | 369 | void (*local_error)(struct sk_buff *skb, u32 mtu); |
1da177e4 LT |
370 | }; |
371 | ||
d511337a JP |
372 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); |
373 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
374 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); | |
711059b9 | 375 | struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family); |
1da177e4 | 376 | |
2f32b51b SK |
377 | struct xfrm_input_afinfo { |
378 | unsigned int family; | |
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 | 406 | /* Estimate maximal size of result of transformation of a dgram */ |
c5c25238 | 407 | u32 (*get_mtu)(struct xfrm_state *, int size); |
1da177e4 LT |
408 | }; |
409 | ||
d511337a JP |
410 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
411 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); | |
1da177e4 | 412 | |
9d389d7f SK |
413 | struct xfrm_type_offload { |
414 | char *description; | |
415 | struct module *owner; | |
416 | u8 proto; | |
417 | void (*encap)(struct xfrm_state *, struct sk_buff *pskb); | |
418 | int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb); | |
419 | int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features); | |
420 | }; | |
421 | ||
422 | int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family); | |
423 | int xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family); | |
424 | ||
b59f45d0 | 425 | struct xfrm_mode { |
227620e2 HX |
426 | /* |
427 | * Remove encapsulation header. | |
428 | * | |
429 | * The IP header will be moved over the top of the encapsulation | |
430 | * header. | |
431 | * | |
432 | * On entry, the transport header shall point to where the IP header | |
433 | * should be and the network header shall be set to where the IP | |
434 | * header currently is. skb->data shall point to the start of the | |
435 | * payload. | |
436 | */ | |
437 | int (*input2)(struct xfrm_state *x, struct sk_buff *skb); | |
438 | ||
439 | /* | |
440 | * This is the actual input entry point. | |
441 | * | |
442 | * For transport mode and equivalent this would be identical to | |
443 | * input2 (which does not need to be set). While tunnel mode | |
444 | * and equivalent would set this to the tunnel encapsulation function | |
445 | * xfrm4_prepare_input that would in turn call input2. | |
446 | */ | |
b59f45d0 | 447 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); |
37fedd3a HX |
448 | |
449 | /* | |
450 | * Add encapsulation header. | |
451 | * | |
452 | * On exit, the transport header will be set to the start of the | |
453 | * encapsulation header to be filled in by x->type->output and | |
454 | * the mac header will be set to the nextheader (protocol for | |
455 | * IPv4) field of the extension header directly preceding the | |
456 | * encapsulation header, or in its absence, that of the top IP | |
457 | * header. The value of the network header will always point | |
458 | * to the top IP header while skb->data will point to the payload. | |
459 | */ | |
36cf9acf HX |
460 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); |
461 | ||
462 | /* | |
463 | * This is the actual output entry point. | |
464 | * | |
465 | * For transport mode and equivalent this would be identical to | |
466 | * output2 (which does not need to be set). While tunnel mode | |
467 | * and equivalent would set this to a tunnel encapsulation function | |
468 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn | |
469 | * call output2. | |
470 | */ | |
471 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); | |
b59f45d0 | 472 | |
c35fe410 SK |
473 | /* |
474 | * Adjust pointers into the packet and do GSO segmentation. | |
475 | */ | |
476 | struct sk_buff *(*gso_segment)(struct xfrm_state *x, struct sk_buff *skb, netdev_features_t features); | |
477 | ||
478 | /* | |
479 | * Adjust pointers into the packet when IPsec is done at layer2. | |
480 | */ | |
481 | void (*xmit)(struct xfrm_state *x, struct sk_buff *skb); | |
482 | ||
17c2a42a | 483 | struct xfrm_state_afinfo *afinfo; |
b59f45d0 HX |
484 | struct module *owner; |
485 | unsigned int encap; | |
1bfcb10f HX |
486 | int flags; |
487 | }; | |
488 | ||
489 | /* Flags for xfrm_mode. */ | |
490 | enum { | |
491 | XFRM_MODE_FLAG_TUNNEL = 1, | |
b59f45d0 HX |
492 | }; |
493 | ||
d511337a JP |
494 | int xfrm_register_mode(struct xfrm_mode *mode, int family); |
495 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family); | |
b59f45d0 | 496 | |
df9dcb45 KM |
497 | static inline int xfrm_af2proto(unsigned int family) |
498 | { | |
499 | switch(family) { | |
500 | case AF_INET: | |
501 | return IPPROTO_IPIP; | |
502 | case AF_INET6: | |
503 | return IPPROTO_IPV6; | |
504 | default: | |
505 | return 0; | |
506 | } | |
507 | } | |
508 | ||
509 | static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) | |
510 | { | |
511 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || | |
512 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) | |
513 | return x->inner_mode; | |
514 | else | |
515 | return x->inner_mode_iaf; | |
516 | } | |
517 | ||
fd2c3ef7 | 518 | struct xfrm_tmpl { |
1da177e4 LT |
519 | /* id in template is interpreted as: |
520 | * daddr - destination of tunnel, may be zero for transport mode. | |
521 | * spi - zero to acquire spi. Not zero if spi is static, then | |
522 | * daddr must be fixed too. | |
523 | * proto - AH/ESP/IPCOMP | |
524 | */ | |
525 | struct xfrm_id id; | |
526 | ||
527 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
528 | xfrm_address_t saddr; | |
529 | ||
76b3f055 MK |
530 | unsigned short encap_family; |
531 | ||
a6337463 | 532 | u32 reqid; |
1da177e4 | 533 | |
7e49e6de | 534 | /* Mode: transport, tunnel etc. */ |
a6337463 | 535 | u8 mode; |
1da177e4 LT |
536 | |
537 | /* Sharing mode: unique, this session only, this user only etc. */ | |
a6337463 | 538 | u8 share; |
1da177e4 LT |
539 | |
540 | /* May skip this transfomration if no SA is found */ | |
a6337463 | 541 | u8 optional; |
1da177e4 | 542 | |
c5d18e98 | 543 | /* Skip aalgos/ealgos/calgos checks. */ |
a6337463 | 544 | u8 allalgs; |
c5d18e98 | 545 | |
1da177e4 | 546 | /* Bit mask of algos allowed for acquisition */ |
a6337463 | 547 | u32 aalgos; |
548 | u32 ealgos; | |
549 | u32 calgos; | |
1da177e4 LT |
550 | }; |
551 | ||
622dc828 | 552 | #define XFRM_MAX_DEPTH 6 |
54ef207a | 553 | #define XFRM_MAX_OFFLOAD_DEPTH 1 |
1da177e4 | 554 | |
12a169e7 HX |
555 | struct xfrm_policy_walk_entry { |
556 | struct list_head all; | |
557 | u8 dead; | |
558 | }; | |
559 | ||
560 | struct xfrm_policy_walk { | |
561 | struct xfrm_policy_walk_entry walk; | |
562 | u8 type; | |
563 | u32 seq; | |
564 | }; | |
565 | ||
a0073fe1 SK |
566 | struct xfrm_policy_queue { |
567 | struct sk_buff_head hold_queue; | |
568 | struct timer_list hold_timer; | |
569 | unsigned long timeout; | |
570 | }; | |
571 | ||
fd2c3ef7 | 572 | struct xfrm_policy { |
0c5c9fb5 | 573 | possible_net_t xp_net; |
2518c7c2 DM |
574 | struct hlist_node bydst; |
575 | struct hlist_node byidx; | |
1da177e4 LT |
576 | |
577 | /* This lock only affects elements except for entry. */ | |
578 | rwlock_t lock; | |
850a6212 | 579 | refcount_t refcnt; |
6be3b0db | 580 | u32 pos; |
1da177e4 LT |
581 | struct timer_list timer; |
582 | ||
80c802f3 | 583 | atomic_t genid; |
1da177e4 LT |
584 | u32 priority; |
585 | u32 index; | |
7e652640 | 586 | u32 if_id; |
bf825f81 | 587 | struct xfrm_mark mark; |
1da177e4 LT |
588 | struct xfrm_selector selector; |
589 | struct xfrm_lifetime_cfg lft; | |
590 | struct xfrm_lifetime_cur curlft; | |
12a169e7 | 591 | struct xfrm_policy_walk_entry walk; |
a0073fe1 | 592 | struct xfrm_policy_queue polq; |
9cf545eb | 593 | bool bydst_reinsert; |
46ca5f5d ACM |
594 | u8 type; |
595 | u8 action; | |
596 | u8 flags; | |
46ca5f5d | 597 | u8 xfrm_nr; |
12a169e7 | 598 | u16 family; |
df71837d | 599 | struct xfrm_sec_ctx *security; |
1da177e4 | 600 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
24969fac | 601 | struct hlist_node bydst_inexact_list; |
56f04730 | 602 | struct rcu_head rcu; |
1da177e4 LT |
603 | }; |
604 | ||
63eb23f5 | 605 | static inline struct net *xp_net(const struct xfrm_policy *xp) |
0331b1f3 AD |
606 | { |
607 | return read_pnet(&xp->xp_net); | |
608 | } | |
609 | ||
13c1d189 AE |
610 | struct xfrm_kmaddress { |
611 | xfrm_address_t local; | |
612 | xfrm_address_t remote; | |
613 | u32 reserved; | |
614 | u16 family; | |
615 | }; | |
616 | ||
80c9abaa SS |
617 | struct xfrm_migrate { |
618 | xfrm_address_t old_daddr; | |
619 | xfrm_address_t old_saddr; | |
620 | xfrm_address_t new_daddr; | |
621 | xfrm_address_t new_saddr; | |
622 | u8 proto; | |
623 | u8 mode; | |
624 | u16 reserved; | |
625 | u32 reqid; | |
626 | u16 old_family; | |
627 | u16 new_family; | |
628 | }; | |
629 | ||
f8cd5488 | 630 | #define XFRM_KM_TIMEOUT 30 |
f8cd5488 JHS |
631 | /* what happened */ |
632 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
633 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
634 | ||
635 | /* default aevent timeout in units of 100ms */ | |
636 | #define XFRM_AE_ETIME 10 | |
637 | /* Async Event timer multiplier */ | |
638 | #define XFRM_AE_ETH_M 10 | |
639 | /* default seq threshold size */ | |
640 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 | 641 | |
fd2c3ef7 | 642 | struct xfrm_mgr { |
1da177e4 | 643 | struct list_head list; |
214e005b | 644 | int (*notify)(struct xfrm_state *x, const struct km_event *c); |
65e0736b | 645 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); |
cb969f07 | 646 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 647 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
214e005b | 648 | int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); |
db983c11 | 649 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
183cad12 DM |
650 | int (*migrate)(const struct xfrm_selector *sel, |
651 | u8 dir, u8 type, | |
652 | const struct xfrm_migrate *m, | |
653 | int num_bundles, | |
8bafd730 AA |
654 | const struct xfrm_kmaddress *k, |
655 | const struct xfrm_encap_tmpl *encap); | |
0f24558e | 656 | bool (*is_alive)(const struct km_event *c); |
1da177e4 LT |
657 | }; |
658 | ||
d511337a JP |
659 | int xfrm_register_km(struct xfrm_mgr *km); |
660 | int xfrm_unregister_km(struct xfrm_mgr *km); | |
1da177e4 | 661 | |
70be6c91 SK |
662 | struct xfrm_tunnel_skb_cb { |
663 | union { | |
664 | struct inet_skb_parm h4; | |
665 | struct inet6_skb_parm h6; | |
666 | } header; | |
667 | ||
668 | union { | |
669 | struct ip_tunnel *ip4; | |
670 | struct ip6_tnl *ip6; | |
671 | } tunnel; | |
672 | }; | |
673 | ||
674 | #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) | |
675 | ||
436a0a40 HX |
676 | /* |
677 | * This structure is used for the duration where packets are being | |
678 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
679 | * area beyond the generic IP part may be overwritten. | |
680 | */ | |
681 | struct xfrm_skb_cb { | |
70be6c91 | 682 | struct xfrm_tunnel_skb_cb header; |
436a0a40 HX |
683 | |
684 | /* Sequence number for replay protection. */ | |
b318e0e4 | 685 | union { |
1ce3644a SK |
686 | struct { |
687 | __u32 low; | |
688 | __u32 hi; | |
689 | } output; | |
690 | struct { | |
691 | __be32 low; | |
692 | __be32 hi; | |
693 | } input; | |
b318e0e4 | 694 | } seq; |
436a0a40 HX |
695 | }; |
696 | ||
697 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
698 | ||
36cf9acf HX |
699 | /* |
700 | * This structure is used by the afinfo prepare_input/prepare_output functions | |
701 | * to transmit header information to the mode input/output functions. | |
702 | */ | |
703 | struct xfrm_mode_skb_cb { | |
70be6c91 | 704 | struct xfrm_tunnel_skb_cb header; |
36cf9acf HX |
705 | |
706 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
707 | __be16 id; | |
708 | __be16 frag_off; | |
709 | ||
732c8bd5 HX |
710 | /* IP header length (excluding options or extension headers). */ |
711 | u8 ihl; | |
712 | ||
36cf9acf HX |
713 | /* TOS for IPv4, class for IPv6. */ |
714 | u8 tos; | |
715 | ||
716 | /* TTL for IPv4, hop limitfor IPv6. */ | |
717 | u8 ttl; | |
718 | ||
719 | /* Protocol for IPv4, NH for IPv6. */ | |
720 | u8 protocol; | |
721 | ||
732c8bd5 HX |
722 | /* Option length for IPv4, zero for IPv6. */ |
723 | u8 optlen; | |
724 | ||
36cf9acf HX |
725 | /* Used by IPv6 only, zero for IPv4. */ |
726 | u8 flow_lbl[3]; | |
727 | }; | |
728 | ||
729 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
730 | ||
716062fd HX |
731 | /* |
732 | * This structure is used by the input processing to locate the SPI and | |
733 | * related information. | |
734 | */ | |
735 | struct xfrm_spi_skb_cb { | |
70be6c91 | 736 | struct xfrm_tunnel_skb_cb header; |
716062fd | 737 | |
716062fd | 738 | unsigned int daddroff; |
2fcb45b6 | 739 | unsigned int family; |
7785bba2 | 740 | __be32 seq; |
716062fd HX |
741 | }; |
742 | ||
743 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) | |
744 | ||
c9204d9c | 745 | #ifdef CONFIG_AUDITSYSCALL |
afeb14b4 | 746 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
ab5f5e8b JL |
747 | { |
748 | struct audit_buffer *audit_buf = NULL; | |
ab5f5e8b | 749 | |
f7859590 | 750 | if (audit_enabled == AUDIT_OFF) |
afeb14b4 | 751 | return NULL; |
cdfb6b34 | 752 | audit_buf = audit_log_start(audit_context(), GFP_ATOMIC, |
afeb14b4 | 753 | AUDIT_MAC_IPSEC_EVENT); |
ab5f5e8b JL |
754 | if (audit_buf == NULL) |
755 | return NULL; | |
afeb14b4 PM |
756 | audit_log_format(audit_buf, "op=%s", op); |
757 | return audit_buf; | |
758 | } | |
ab5f5e8b | 759 | |
2e71029e | 760 | static inline void xfrm_audit_helper_usrinfo(bool task_valid, |
afeb14b4 PM |
761 | struct audit_buffer *audit_buf) |
762 | { | |
2e71029e TH |
763 | const unsigned int auid = from_kuid(&init_user_ns, task_valid ? |
764 | audit_get_loginuid(current) : | |
765 | INVALID_UID); | |
766 | const unsigned int ses = task_valid ? audit_get_sessionid(current) : | |
f0b75216 | 767 | AUDIT_SID_UNSET; |
2e71029e TH |
768 | |
769 | audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); | |
f1370cc4 | 770 | audit_log_task_context(audit_buf); |
ab5f5e8b JL |
771 | } |
772 | ||
2e71029e TH |
773 | void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid); |
774 | void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
775 | bool task_valid); | |
776 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid); | |
777 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid); | |
d511337a JP |
778 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
779 | struct sk_buff *skb); | |
780 | void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, | |
781 | __be32 net_seq); | |
782 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); | |
783 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, | |
784 | __be32 net_seq); | |
785 | void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, | |
786 | u8 proto); | |
c9204d9c | 787 | #else |
41fef0ee MS |
788 | |
789 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
2e71029e | 790 | bool task_valid) |
41fef0ee MS |
791 | { |
792 | } | |
793 | ||
794 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
2e71029e | 795 | bool task_valid) |
41fef0ee MS |
796 | { |
797 | } | |
798 | ||
799 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
2e71029e | 800 | bool task_valid) |
41fef0ee MS |
801 | { |
802 | } | |
803 | ||
804 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
2e71029e | 805 | bool task_valid) |
41fef0ee MS |
806 | { |
807 | } | |
808 | ||
809 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
810 | struct sk_buff *skb) | |
811 | { | |
812 | } | |
813 | ||
9fdc4883 SK |
814 | static inline void xfrm_audit_state_replay(struct xfrm_state *x, |
815 | struct sk_buff *skb, __be32 net_seq) | |
816 | { | |
817 | } | |
818 | ||
41fef0ee MS |
819 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, |
820 | u16 family) | |
821 | { | |
822 | } | |
823 | ||
824 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
825 | __be32 net_spi, __be32 net_seq) | |
826 | { | |
827 | } | |
828 | ||
829 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
830 | struct sk_buff *skb, u8 proto) | |
831 | { | |
832 | } | |
c9204d9c | 833 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 834 | |
1da177e4 LT |
835 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
836 | { | |
837 | if (likely(policy != NULL)) | |
850a6212 | 838 | refcount_inc(&policy->refcnt); |
1da177e4 LT |
839 | } |
840 | ||
d511337a | 841 | void xfrm_policy_destroy(struct xfrm_policy *policy); |
1da177e4 LT |
842 | |
843 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
844 | { | |
850a6212 | 845 | if (refcount_dec_and_test(&policy->refcnt)) |
64c31b3f | 846 | xfrm_policy_destroy(policy); |
1da177e4 LT |
847 | } |
848 | ||
4e81bb83 MN |
849 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
850 | { | |
851 | int i; | |
852 | for (i = npols - 1; i >= 0; --i) | |
853 | xfrm_pol_put(pols[i]); | |
854 | } | |
4e81bb83 | 855 | |
f75a2804 | 856 | void __xfrm_state_destroy(struct xfrm_state *, bool); |
1da177e4 | 857 | |
21380b81 HX |
858 | static inline void __xfrm_state_put(struct xfrm_state *x) |
859 | { | |
88755e9c | 860 | refcount_dec(&x->refcnt); |
21380b81 HX |
861 | } |
862 | ||
1da177e4 LT |
863 | static inline void xfrm_state_put(struct xfrm_state *x) |
864 | { | |
88755e9c | 865 | if (refcount_dec_and_test(&x->refcnt)) |
f75a2804 CW |
866 | __xfrm_state_destroy(x, false); |
867 | } | |
868 | ||
869 | static inline void xfrm_state_put_sync(struct xfrm_state *x) | |
870 | { | |
871 | if (refcount_dec_and_test(&x->refcnt)) | |
872 | __xfrm_state_destroy(x, true); | |
1da177e4 LT |
873 | } |
874 | ||
875 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
876 | { | |
88755e9c | 877 | refcount_inc(&x->refcnt); |
1da177e4 LT |
878 | } |
879 | ||
1744a8fe | 880 | static inline bool addr_match(const void *token1, const void *token2, |
e1b0048e | 881 | unsigned int prefixlen) |
1da177e4 | 882 | { |
1744a8fe DM |
883 | const __be32 *a1 = token1; |
884 | const __be32 *a2 = token2; | |
e1b0048e AD |
885 | unsigned int pdw; |
886 | unsigned int pbi; | |
1da177e4 | 887 | |
a6337463 | 888 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
1da177e4 LT |
889 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
890 | ||
891 | if (pdw) | |
892 | if (memcmp(a1, a2, pdw << 2)) | |
1744a8fe | 893 | return false; |
1da177e4 LT |
894 | |
895 | if (pbi) { | |
5f19343f | 896 | __be32 mask; |
1da177e4 LT |
897 | |
898 | mask = htonl((0xffffffff) << (32 - pbi)); | |
899 | ||
900 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
1744a8fe | 901 | return false; |
1da177e4 LT |
902 | } |
903 | ||
1744a8fe | 904 | return true; |
1da177e4 LT |
905 | } |
906 | ||
26bff940 AD |
907 | static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) |
908 | { | |
909 | /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ | |
6c786bcb | 910 | if (sizeof(long) == 4 && prefixlen == 0) |
26bff940 | 911 | return true; |
6c786bcb | 912 | return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen))); |
26bff940 AD |
913 | } |
914 | ||
1da177e4 | 915 | static __inline__ |
6281dcc9 | 916 | __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 917 | { |
f9d07e41 | 918 | __be16 port; |
1d28f42c | 919 | switch(fl->flowi_proto) { |
1da177e4 LT |
920 | case IPPROTO_TCP: |
921 | case IPPROTO_UDP: | |
ba4e58ec | 922 | case IPPROTO_UDPLITE: |
1da177e4 | 923 | case IPPROTO_SCTP: |
6281dcc9 | 924 | port = uli->ports.sport; |
1da177e4 LT |
925 | break; |
926 | case IPPROTO_ICMP: | |
927 | case IPPROTO_ICMPV6: | |
6281dcc9 | 928 | port = htons(uli->icmpt.type); |
1da177e4 | 929 | break; |
2ce4272a | 930 | case IPPROTO_MH: |
6281dcc9 | 931 | port = htons(uli->mht.type); |
2ce4272a | 932 | break; |
cc9ff19d | 933 | case IPPROTO_GRE: |
6281dcc9 | 934 | port = htons(ntohl(uli->gre_key) >> 16); |
cc9ff19d | 935 | break; |
1da177e4 LT |
936 | default: |
937 | port = 0; /*XXX*/ | |
938 | } | |
939 | return port; | |
940 | } | |
941 | ||
942 | static __inline__ | |
6281dcc9 | 943 | __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 944 | { |
f9d07e41 | 945 | __be16 port; |
1d28f42c | 946 | switch(fl->flowi_proto) { |
1da177e4 LT |
947 | case IPPROTO_TCP: |
948 | case IPPROTO_UDP: | |
ba4e58ec | 949 | case IPPROTO_UDPLITE: |
1da177e4 | 950 | case IPPROTO_SCTP: |
6281dcc9 | 951 | port = uli->ports.dport; |
1da177e4 LT |
952 | break; |
953 | case IPPROTO_ICMP: | |
954 | case IPPROTO_ICMPV6: | |
6281dcc9 | 955 | port = htons(uli->icmpt.code); |
1da177e4 | 956 | break; |
cc9ff19d | 957 | case IPPROTO_GRE: |
6281dcc9 | 958 | port = htons(ntohl(uli->gre_key) & 0xffff); |
cc9ff19d | 959 | break; |
1da177e4 LT |
960 | default: |
961 | port = 0; /*XXX*/ | |
962 | } | |
963 | return port; | |
964 | } | |
965 | ||
d511337a JP |
966 | bool xfrm_selector_match(const struct xfrm_selector *sel, |
967 | const struct flowi *fl, unsigned short family); | |
1da177e4 | 968 | |
df71837d TJ |
969 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
970 | /* If neither has a context --> match | |
971 | * Otherwise, both must have a context and the sids, doi, alg must match | |
972 | */ | |
bc9b35ad | 973 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d TJ |
974 | { |
975 | return ((!s1 && !s2) || | |
976 | (s1 && s2 && | |
977 | (s1->ctx_sid == s2->ctx_sid) && | |
978 | (s1->ctx_doi == s2->ctx_doi) && | |
979 | (s1->ctx_alg == s2->ctx_alg))); | |
980 | } | |
981 | #else | |
bc9b35ad | 982 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d | 983 | { |
bc9b35ad | 984 | return true; |
df71837d TJ |
985 | } |
986 | #endif | |
987 | ||
1da177e4 LT |
988 | /* A struct encoding bundle of transformations to apply to some set of flow. |
989 | * | |
b6ca8bd5 | 990 | * xdst->child points to the next element of bundle. |
1da177e4 LT |
991 | * dst->xfrm points to an instanse of transformer. |
992 | * | |
993 | * Due to unfortunate limitations of current routing cache, which we | |
994 | * have no time to fix, it mirrors struct rtable and bound to the same | |
995 | * routing key, including saddr,daddr. However, we can have many of | |
996 | * bundles differing by session id. All the bundles grow from a parent | |
997 | * policy rule. | |
998 | */ | |
fd2c3ef7 | 999 | struct xfrm_dst { |
1da177e4 | 1000 | union { |
1da177e4 LT |
1001 | struct dst_entry dst; |
1002 | struct rtable rt; | |
1003 | struct rt6_info rt6; | |
1004 | } u; | |
1005 | struct dst_entry *route; | |
b6ca8bd5 | 1006 | struct dst_entry *child; |
0f6c480f | 1007 | struct dst_entry *path; |
80c802f3 TT |
1008 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; |
1009 | int num_pols, num_xfrms; | |
80c802f3 TT |
1010 | u32 xfrm_genid; |
1011 | u32 policy_genid; | |
1da177e4 LT |
1012 | u32 route_mtu_cached; |
1013 | u32 child_mtu_cached; | |
92d63dec HY |
1014 | u32 route_cookie; |
1015 | u32 path_cookie; | |
1da177e4 LT |
1016 | }; |
1017 | ||
0f6c480f DM |
1018 | static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst) |
1019 | { | |
1020 | #ifdef CONFIG_XFRM | |
1021 | if (dst->xfrm) { | |
1022 | const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst; | |
1023 | ||
1024 | return xdst->path; | |
1025 | } | |
1026 | #endif | |
1027 | return (struct dst_entry *) dst; | |
1028 | } | |
1029 | ||
b92cf4aa DM |
1030 | static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst) |
1031 | { | |
1032 | #ifdef CONFIG_XFRM | |
b6ca8bd5 DM |
1033 | if (dst->xfrm) { |
1034 | struct xfrm_dst *xdst = (struct xfrm_dst *) dst; | |
1035 | return xdst->child; | |
1036 | } | |
b92cf4aa DM |
1037 | #endif |
1038 | return NULL; | |
1039 | } | |
1040 | ||
def8b4fa | 1041 | #ifdef CONFIG_XFRM |
45b018be DM |
1042 | static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child) |
1043 | { | |
b6ca8bd5 | 1044 | xdst->child = child; |
45b018be DM |
1045 | } |
1046 | ||
aabc9761 HX |
1047 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
1048 | { | |
80c802f3 | 1049 | xfrm_pols_put(xdst->pols, xdst->num_pols); |
aabc9761 HX |
1050 | dst_release(xdst->route); |
1051 | if (likely(xdst->u.dst.xfrm)) | |
1052 | xfrm_state_put(xdst->u.dst.xfrm); | |
1053 | } | |
def8b4fa | 1054 | #endif |
aabc9761 | 1055 | |
d511337a | 1056 | void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); |
aabc9761 | 1057 | |
f203b76d SK |
1058 | struct xfrm_if_parms { |
1059 | char name[IFNAMSIZ]; /* name of XFRM device */ | |
1060 | int link; /* ifindex of underlying L2 interface */ | |
1061 | u32 if_id; /* interface identifyer */ | |
1062 | }; | |
1063 | ||
1064 | struct xfrm_if { | |
1065 | struct xfrm_if __rcu *next; /* next interface in list */ | |
1066 | struct net_device *dev; /* virtual device associated with interface */ | |
1067 | struct net_device *phydev; /* physical device */ | |
1068 | struct net *net; /* netns for packet i/o */ | |
1069 | struct xfrm_if_parms p; /* interface parms */ | |
1070 | ||
1071 | struct gro_cells gro_cells; | |
1072 | }; | |
1073 | ||
54ef207a SK |
1074 | struct xfrm_offload { |
1075 | /* Output sequence number for replay protection on offloading. */ | |
1076 | struct { | |
1077 | __u32 low; | |
1078 | __u32 hi; | |
1079 | } seq; | |
1080 | ||
1081 | __u32 flags; | |
1082 | #define SA_DELETE_REQ 1 | |
1083 | #define CRYPTO_DONE 2 | |
1084 | #define CRYPTO_NEXT_DONE 4 | |
1085 | #define CRYPTO_FALLBACK 8 | |
1086 | #define XFRM_GSO_SEGMENT 16 | |
1087 | #define XFRM_GRO 32 | |
47ebcc0b | 1088 | #define XFRM_ESP_NO_TRAILER 64 |
f53c7239 | 1089 | #define XFRM_DEV_RESUME 128 |
54ef207a SK |
1090 | |
1091 | __u32 status; | |
1092 | #define CRYPTO_SUCCESS 1 | |
1093 | #define CRYPTO_GENERIC_ERROR 2 | |
1094 | #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4 | |
1095 | #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8 | |
1096 | #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16 | |
1097 | #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32 | |
1098 | #define CRYPTO_INVALID_PACKET_SYNTAX 64 | |
1099 | #define CRYPTO_INVALID_PROTOCOL 128 | |
1100 | ||
1101 | __u8 proto; | |
1102 | }; | |
1103 | ||
fd2c3ef7 | 1104 | struct sec_path { |
1da177e4 | 1105 | int len; |
54ef207a SK |
1106 | int olen; |
1107 | ||
dbe5b4aa | 1108 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
54ef207a | 1109 | struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH]; |
1da177e4 LT |
1110 | }; |
1111 | ||
0ca64da1 | 1112 | struct sec_path *secpath_set(struct sk_buff *skb); |
1da177e4 LT |
1113 | |
1114 | static inline void | |
1115 | secpath_reset(struct sk_buff *skb) | |
1116 | { | |
1117 | #ifdef CONFIG_XFRM | |
4165079b | 1118 | skb_ext_del(skb, SKB_EXT_SEC_PATH); |
1da177e4 LT |
1119 | #endif |
1120 | } | |
1121 | ||
a1e59abf | 1122 | static inline int |
6cc32961 | 1123 | xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) |
a1e59abf PM |
1124 | { |
1125 | switch (family) { | |
1126 | case AF_INET: | |
1127 | return addr->a4 == 0; | |
1128 | case AF_INET6: | |
15e318bd | 1129 | return ipv6_addr_any(&addr->in6); |
a1e59abf PM |
1130 | } |
1131 | return 0; | |
1132 | } | |
1133 | ||
1da177e4 | 1134 | static inline int |
21eddb5c | 1135 | __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1136 | { |
1137 | return (tmpl->saddr.a4 && | |
1138 | tmpl->saddr.a4 != x->props.saddr.a4); | |
1139 | } | |
1140 | ||
1141 | static inline int | |
21eddb5c | 1142 | __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1143 | { |
1144 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
ff88b30c | 1145 | !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); |
1da177e4 LT |
1146 | } |
1147 | ||
1148 | static inline int | |
21eddb5c | 1149 | xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) |
1da177e4 LT |
1150 | { |
1151 | switch (family) { | |
1152 | case AF_INET: | |
1153 | return __xfrm4_state_addr_cmp(tmpl, x); | |
1154 | case AF_INET6: | |
1155 | return __xfrm6_state_addr_cmp(tmpl, x); | |
1156 | } | |
1157 | return !0; | |
1158 | } | |
1159 | ||
1160 | #ifdef CONFIG_XFRM | |
d511337a JP |
1161 | int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, |
1162 | unsigned short family); | |
1da177e4 | 1163 | |
d5422efe HX |
1164 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
1165 | struct sk_buff *skb, | |
1166 | unsigned int family, int reverse) | |
1da177e4 | 1167 | { |
f6e1e25d | 1168 | struct net *net = dev_net(skb->dev); |
d5422efe HX |
1169 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
1170 | ||
1da177e4 | 1171 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
d5422efe | 1172 | return __xfrm_policy_check(sk, ndir, skb, family); |
4e81bb83 | 1173 | |
26912e37 | 1174 | return (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) || |
adf30907 | 1175 | (skb_dst(skb)->flags & DST_NOPOLICY) || |
d5422efe HX |
1176 | __xfrm_policy_check(sk, ndir, skb, family); |
1177 | } | |
1178 | ||
1179 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1180 | { | |
1181 | return __xfrm_policy_check2(sk, dir, skb, family, 0); | |
1da177e4 LT |
1182 | } |
1183 | ||
1184 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1185 | { | |
1186 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
1187 | } | |
1188 | ||
1189 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1190 | { | |
1191 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
1192 | } | |
1193 | ||
d5422efe HX |
1194 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1195 | struct sk_buff *skb) | |
1196 | { | |
1197 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); | |
1198 | } | |
1199 | ||
1200 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1201 | struct sk_buff *skb) | |
1202 | { | |
1203 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); | |
1204 | } | |
1205 | ||
d511337a JP |
1206 | int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, |
1207 | unsigned int family, int reverse); | |
d5422efe HX |
1208 | |
1209 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1210 | unsigned int family) | |
1211 | { | |
1212 | return __xfrm_decode_session(skb, fl, family, 0); | |
1213 | } | |
1214 | ||
1215 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, | |
1216 | struct flowi *fl, | |
1217 | unsigned int family) | |
1218 | { | |
1219 | return __xfrm_decode_session(skb, fl, family, 1); | |
1220 | } | |
1221 | ||
d511337a | 1222 | int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
1da177e4 LT |
1223 | |
1224 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
1225 | { | |
99a66657 AD |
1226 | struct net *net = dev_net(skb->dev); |
1227 | ||
1228 | return !net->xfrm.policy_count[XFRM_POLICY_OUT] || | |
adf30907 | 1229 | (skb_dst(skb)->flags & DST_NOXFRM) || |
1da177e4 LT |
1230 | __xfrm_route_forward(skb, family); |
1231 | } | |
1232 | ||
1233 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
1234 | { | |
1235 | return xfrm_route_forward(skb, AF_INET); | |
1236 | } | |
1237 | ||
1238 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
1239 | { | |
1240 | return xfrm_route_forward(skb, AF_INET6); | |
1241 | } | |
1242 | ||
d188ba86 | 1243 | int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk); |
1da177e4 | 1244 | |
d188ba86 | 1245 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) |
1da177e4 | 1246 | { |
d188ba86 ED |
1247 | sk->sk_policy[0] = NULL; |
1248 | sk->sk_policy[1] = NULL; | |
1249 | if (unlikely(osk->sk_policy[0] || osk->sk_policy[1])) | |
1250 | return __xfrm_sk_clone_policy(sk, osk); | |
1da177e4 LT |
1251 | return 0; |
1252 | } | |
1253 | ||
d511337a | 1254 | int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
1255 | |
1256 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
1257 | { | |
d188ba86 ED |
1258 | struct xfrm_policy *pol; |
1259 | ||
1260 | pol = rcu_dereference_protected(sk->sk_policy[0], 1); | |
1261 | if (unlikely(pol != NULL)) { | |
1262 | xfrm_policy_delete(pol, XFRM_POLICY_MAX); | |
1da177e4 LT |
1263 | sk->sk_policy[0] = NULL; |
1264 | } | |
d188ba86 ED |
1265 | pol = rcu_dereference_protected(sk->sk_policy[1], 1); |
1266 | if (unlikely(pol != NULL)) { | |
1267 | xfrm_policy_delete(pol, XFRM_POLICY_MAX+1); | |
1da177e4 LT |
1268 | sk->sk_policy[1] = NULL; |
1269 | } | |
1270 | } | |
1271 | ||
1272 | #else | |
1273 | ||
1274 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
d188ba86 | 1275 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; } |
82695b30 SH |
1276 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } |
1277 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
1da177e4 | 1278 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
82695b30 SH |
1279 | { |
1280 | return 1; | |
1281 | } | |
1da177e4 LT |
1282 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
1283 | { | |
1284 | return 1; | |
1285 | } | |
1286 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1287 | { | |
1288 | return 1; | |
1289 | } | |
d5422efe HX |
1290 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
1291 | struct flowi *fl, | |
1292 | unsigned int family) | |
1293 | { | |
1294 | return -ENOSYS; | |
1295 | } | |
1296 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, | |
1297 | struct sk_buff *skb) | |
1298 | { | |
1299 | return 1; | |
1300 | } | |
1301 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1302 | struct sk_buff *skb) | |
1303 | { | |
1304 | return 1; | |
1305 | } | |
1da177e4 LT |
1306 | #endif |
1307 | ||
1308 | static __inline__ | |
e8a4e377 | 1309 | xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1310 | { |
1311 | switch (family){ | |
1312 | case AF_INET: | |
7e1dc7b6 | 1313 | return (xfrm_address_t *)&fl->u.ip4.daddr; |
1da177e4 | 1314 | case AF_INET6: |
7e1dc7b6 | 1315 | return (xfrm_address_t *)&fl->u.ip6.daddr; |
1da177e4 LT |
1316 | } |
1317 | return NULL; | |
1318 | } | |
1319 | ||
1320 | static __inline__ | |
e8a4e377 | 1321 | xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1322 | { |
1323 | switch (family){ | |
1324 | case AF_INET: | |
7e1dc7b6 | 1325 | return (xfrm_address_t *)&fl->u.ip4.saddr; |
1da177e4 | 1326 | case AF_INET6: |
7e1dc7b6 | 1327 | return (xfrm_address_t *)&fl->u.ip6.saddr; |
1da177e4 LT |
1328 | } |
1329 | return NULL; | |
1330 | } | |
1331 | ||
9bb182a7 | 1332 | static __inline__ |
e8a4e377 | 1333 | void xfrm_flowi_addr_get(const struct flowi *fl, |
9bb182a7 YH |
1334 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
1335 | unsigned short family) | |
1336 | { | |
1337 | switch(family) { | |
1338 | case AF_INET: | |
7e1dc7b6 DM |
1339 | memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); |
1340 | memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); | |
9bb182a7 YH |
1341 | break; |
1342 | case AF_INET6: | |
15e318bd JB |
1343 | saddr->in6 = fl->u.ip6.saddr; |
1344 | daddr->in6 = fl->u.ip6.daddr; | |
9bb182a7 YH |
1345 | break; |
1346 | } | |
1347 | } | |
1348 | ||
1da177e4 | 1349 | static __inline__ int |
f8848067 DM |
1350 | __xfrm4_state_addr_check(const struct xfrm_state *x, |
1351 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 LT |
1352 | { |
1353 | if (daddr->a4 == x->id.daddr.a4 && | |
1354 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
1355 | return 1; | |
1356 | return 0; | |
1357 | } | |
1358 | ||
1359 | static __inline__ int | |
f8848067 DM |
1360 | __xfrm6_state_addr_check(const struct xfrm_state *x, |
1361 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 | 1362 | { |
ff88b30c YH |
1363 | if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && |
1364 | (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || | |
82695b30 | 1365 | ipv6_addr_any((struct in6_addr *)saddr) || |
1da177e4 LT |
1366 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) |
1367 | return 1; | |
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | static __inline__ int | |
f8848067 DM |
1372 | xfrm_state_addr_check(const struct xfrm_state *x, |
1373 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, | |
1da177e4 LT |
1374 | unsigned short family) |
1375 | { | |
1376 | switch (family) { | |
1377 | case AF_INET: | |
1378 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
1379 | case AF_INET6: | |
1380 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
1381 | } | |
1382 | return 0; | |
1383 | } | |
1384 | ||
e53820de | 1385 | static __inline__ int |
f8848067 | 1386 | xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, |
e53820de MN |
1387 | unsigned short family) |
1388 | { | |
1389 | switch (family) { | |
1390 | case AF_INET: | |
1391 | return __xfrm4_state_addr_check(x, | |
7e1dc7b6 DM |
1392 | (const xfrm_address_t *)&fl->u.ip4.daddr, |
1393 | (const xfrm_address_t *)&fl->u.ip4.saddr); | |
e53820de MN |
1394 | case AF_INET6: |
1395 | return __xfrm6_state_addr_check(x, | |
7e1dc7b6 DM |
1396 | (const xfrm_address_t *)&fl->u.ip6.daddr, |
1397 | (const xfrm_address_t *)&fl->u.ip6.saddr); | |
e53820de MN |
1398 | } |
1399 | return 0; | |
1400 | } | |
1401 | ||
f8848067 | 1402 | static inline int xfrm_state_kern(const struct xfrm_state *x) |
1da177e4 LT |
1403 | { |
1404 | return atomic_read(&x->tunnel_users); | |
1405 | } | |
1406 | ||
5794708f MN |
1407 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1408 | { | |
dc00a525 MN |
1409 | return (!userproto || proto == userproto || |
1410 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
1411 | proto == IPPROTO_ESP || | |
1412 | proto == IPPROTO_COMP))); | |
5794708f MN |
1413 | } |
1414 | ||
1da177e4 LT |
1415 | /* |
1416 | * xfrm algorithm information | |
1417 | */ | |
1a6509d9 | 1418 | struct xfrm_algo_aead_info { |
165ecc63 | 1419 | char *geniv; |
1a6509d9 HX |
1420 | u16 icv_truncbits; |
1421 | }; | |
1422 | ||
1da177e4 LT |
1423 | struct xfrm_algo_auth_info { |
1424 | u16 icv_truncbits; | |
1425 | u16 icv_fullbits; | |
1426 | }; | |
1427 | ||
1428 | struct xfrm_algo_encr_info { | |
165ecc63 | 1429 | char *geniv; |
1da177e4 LT |
1430 | u16 blockbits; |
1431 | u16 defkeybits; | |
1432 | }; | |
1433 | ||
1434 | struct xfrm_algo_comp_info { | |
1435 | u16 threshold; | |
1436 | }; | |
1437 | ||
1438 | struct xfrm_algo_desc { | |
1439 | char *name; | |
04ff1260 | 1440 | char *compat; |
1da177e4 | 1441 | u8 available:1; |
7e50f84c | 1442 | u8 pfkey_supported:1; |
1da177e4 | 1443 | union { |
1a6509d9 | 1444 | struct xfrm_algo_aead_info aead; |
1da177e4 LT |
1445 | struct xfrm_algo_auth_info auth; |
1446 | struct xfrm_algo_encr_info encr; | |
1447 | struct xfrm_algo_comp_info comp; | |
1448 | } uinfo; | |
1449 | struct sadb_alg desc; | |
1450 | }; | |
1451 | ||
3328715e SK |
1452 | /* XFRM protocol handlers. */ |
1453 | struct xfrm4_protocol { | |
1454 | int (*handler)(struct sk_buff *skb); | |
1455 | int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1456 | int encap_type); | |
1457 | int (*cb_handler)(struct sk_buff *skb, int err); | |
1458 | int (*err_handler)(struct sk_buff *skb, u32 info); | |
1459 | ||
1460 | struct xfrm4_protocol __rcu *next; | |
1461 | int priority; | |
1462 | }; | |
1463 | ||
7e14ea15 | 1464 | struct xfrm6_protocol { |
1da177e4 | 1465 | int (*handler)(struct sk_buff *skb); |
7e14ea15 SK |
1466 | int (*cb_handler)(struct sk_buff *skb, int err); |
1467 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
1468 | u8 type, u8 code, int offset, __be32 info); | |
d2acc347 | 1469 | |
7e14ea15 | 1470 | struct xfrm6_protocol __rcu *next; |
d2acc347 | 1471 | int priority; |
1da177e4 LT |
1472 | }; |
1473 | ||
1da177e4 LT |
1474 | /* XFRM tunnel handlers. */ |
1475 | struct xfrm_tunnel { | |
aba82695 | 1476 | int (*handler)(struct sk_buff *skb); |
a6337463 | 1477 | int (*err_handler)(struct sk_buff *skb, u32 info); |
d2acc347 | 1478 | |
b33eab08 | 1479 | struct xfrm_tunnel __rcu *next; |
aba82695 FD |
1480 | int priority; |
1481 | }; | |
1482 | ||
1da177e4 | 1483 | struct xfrm6_tunnel { |
d2acc347 HX |
1484 | int (*handler)(struct sk_buff *skb); |
1485 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
d5fdd6ba | 1486 | u8 type, u8 code, int offset, __be32 info); |
6f0bcf15 | 1487 | struct xfrm6_tunnel __rcu *next; |
d2acc347 | 1488 | int priority; |
1da177e4 LT |
1489 | }; |
1490 | ||
d511337a JP |
1491 | void xfrm_init(void); |
1492 | void xfrm4_init(void); | |
1493 | int xfrm_state_init(struct net *net); | |
1494 | void xfrm_state_fini(struct net *net); | |
1495 | void xfrm4_state_init(void); | |
2f32b51b | 1496 | void xfrm4_protocol_init(void); |
c35b7e72 | 1497 | #ifdef CONFIG_XFRM |
d511337a JP |
1498 | int xfrm6_init(void); |
1499 | void xfrm6_fini(void); | |
1500 | int xfrm6_state_init(void); | |
1501 | void xfrm6_state_fini(void); | |
7e14ea15 SK |
1502 | int xfrm6_protocol_init(void); |
1503 | void xfrm6_protocol_fini(void); | |
c35b7e72 DL |
1504 | #else |
1505 | static inline int xfrm6_init(void) | |
1506 | { | |
1507 | return 0; | |
1508 | } | |
1509 | static inline void xfrm6_fini(void) | |
1510 | { | |
1511 | ; | |
1512 | } | |
1513 | #endif | |
1da177e4 | 1514 | |
558f82ef | 1515 | #ifdef CONFIG_XFRM_STATISTICS |
d511337a JP |
1516 | int xfrm_proc_init(struct net *net); |
1517 | void xfrm_proc_fini(struct net *net); | |
558f82ef MN |
1518 | #endif |
1519 | ||
d511337a | 1520 | int xfrm_sysctl_init(struct net *net); |
b27aeadb | 1521 | #ifdef CONFIG_SYSCTL |
d511337a | 1522 | void xfrm_sysctl_fini(struct net *net); |
b27aeadb AD |
1523 | #else |
1524 | static inline void xfrm_sysctl_fini(struct net *net) | |
1525 | { | |
1526 | } | |
1527 | #endif | |
1528 | ||
d3623099 | 1529 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
870a2df4 | 1530 | struct xfrm_address_filter *filter); |
d511337a JP |
1531 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
1532 | int (*func)(struct xfrm_state *, int, void*), void *); | |
283bc9f3 | 1533 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); |
d511337a | 1534 | struct xfrm_state *xfrm_state_alloc(struct net *net); |
4a135e53 | 1535 | void xfrm_state_free(struct xfrm_state *x); |
d511337a JP |
1536 | struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, |
1537 | const xfrm_address_t *saddr, | |
1538 | const struct flowi *fl, | |
1539 | struct xfrm_tmpl *tmpl, | |
1540 | struct xfrm_policy *pol, int *err, | |
bc56b334 | 1541 | unsigned short family, u32 if_id); |
7e652640 | 1542 | struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id, |
d511337a JP |
1543 | xfrm_address_t *daddr, |
1544 | xfrm_address_t *saddr, | |
1545 | unsigned short family, | |
1546 | u8 mode, u8 proto, u32 reqid); | |
c454997e FD |
1547 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
1548 | unsigned short family); | |
d511337a JP |
1549 | int xfrm_state_check_expire(struct xfrm_state *x); |
1550 | void xfrm_state_insert(struct xfrm_state *x); | |
1551 | int xfrm_state_add(struct xfrm_state *x); | |
1552 | int xfrm_state_update(struct xfrm_state *x); | |
1553 | struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, | |
1554 | const xfrm_address_t *daddr, __be32 spi, | |
1555 | u8 proto, unsigned short family); | |
1556 | struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, | |
1557 | const xfrm_address_t *daddr, | |
1558 | const xfrm_address_t *saddr, | |
1559 | u8 proto, | |
1560 | unsigned short family); | |
41a49cc3 | 1561 | #ifdef CONFIG_XFRM_SUB_POLICY |
d511337a | 1562 | int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, |
283bc9f3 | 1563 | unsigned short family, struct net *net); |
d511337a JP |
1564 | int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, |
1565 | unsigned short family); | |
41a49cc3 MN |
1566 | #else |
1567 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
283bc9f3 | 1568 | int n, unsigned short family, struct net *net) |
41a49cc3 MN |
1569 | { |
1570 | return -ENOSYS; | |
1571 | } | |
1572 | ||
1573 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1574 | int n, unsigned short family) | |
1575 | { | |
1576 | return -ENOSYS; | |
1577 | } | |
1578 | #endif | |
af11e316 JHS |
1579 | |
1580 | struct xfrmk_sadinfo { | |
1581 | u32 sadhcnt; /* current hash bkts */ | |
1582 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1583 | u32 sadcnt; /* current running count */ | |
1584 | }; | |
1585 | ||
5a6d3416 JHS |
1586 | struct xfrmk_spdinfo { |
1587 | u32 incnt; | |
1588 | u32 outcnt; | |
1589 | u32 fwdcnt; | |
1590 | u32 inscnt; | |
1591 | u32 outscnt; | |
1592 | u32 fwdscnt; | |
1593 | u32 spdhcnt; | |
1594 | u32 spdhmcnt; | |
1595 | }; | |
1596 | ||
d511337a JP |
1597 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1598 | int xfrm_state_delete(struct xfrm_state *x); | |
f75a2804 | 1599 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync); |
d77e38e6 | 1600 | int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid); |
d511337a JP |
1601 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); |
1602 | void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); | |
1603 | u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); | |
1604 | int xfrm_init_replay(struct xfrm_state *x); | |
1605 | int xfrm_state_mtu(struct xfrm_state *x, int mtu); | |
ffdb5211 | 1606 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload); |
d511337a JP |
1607 | int xfrm_init_state(struct xfrm_state *x); |
1608 | int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); | |
1609 | int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); | |
1610 | int xfrm_input_resume(struct sk_buff *skb, int nexthdr); | |
acf568ee HX |
1611 | int xfrm_trans_queue(struct sk_buff *skb, |
1612 | int (*finish)(struct net *, struct sock *, | |
1613 | struct sk_buff *)); | |
d511337a | 1614 | int xfrm_output_resume(struct sk_buff *skb, int err); |
7026b1dd | 1615 | int xfrm_output(struct sock *sk, struct sk_buff *skb); |
d511337a JP |
1616 | int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1617 | void xfrm_local_error(struct sk_buff *skb, int mtu); | |
1618 | int xfrm4_extract_header(struct sk_buff *skb); | |
1619 | int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); | |
1620 | int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1621 | int encap_type); | |
1622 | int xfrm4_transport_finish(struct sk_buff *skb, int async); | |
1623 | int xfrm4_rcv(struct sk_buff *skb); | |
1e295370 | 1624 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); |
c4541b41 HX |
1625 | |
1626 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1627 | { | |
70be6c91 | 1628 | XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; |
3328715e SK |
1629 | XFRM_SPI_SKB_CB(skb)->family = AF_INET; |
1630 | XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); | |
1631 | return xfrm_input(skb, nexthdr, spi, 0); | |
c4541b41 HX |
1632 | } |
1633 | ||
d511337a JP |
1634 | int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1635 | int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
ede2059d | 1636 | int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
7026b1dd | 1637 | int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb); |
3328715e SK |
1638 | int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err); |
1639 | int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); | |
1640 | int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol); | |
d511337a JP |
1641 | int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1642 | int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
d511337a JP |
1643 | void xfrm4_local_error(struct sk_buff *skb, u32 mtu); |
1644 | int xfrm6_extract_header(struct sk_buff *skb); | |
1645 | int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); | |
63c43787 ND |
1646 | int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi, |
1647 | struct ip6_tnl *t); | |
d511337a | 1648 | int xfrm6_transport_finish(struct sk_buff *skb, int async); |
63c43787 | 1649 | int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t); |
d511337a JP |
1650 | int xfrm6_rcv(struct sk_buff *skb); |
1651 | int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, | |
1652 | xfrm_address_t *saddr, u8 proto); | |
7b77d161 | 1653 | void xfrm6_local_error(struct sk_buff *skb, u32 mtu); |
7e14ea15 SK |
1654 | int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err); |
1655 | int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol); | |
1656 | int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol); | |
d511337a | 1657 | int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
7b77d161 | 1658 | int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); |
d511337a JP |
1659 | __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
1660 | __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); | |
1661 | int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); | |
1662 | int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
ede2059d | 1663 | int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
7026b1dd | 1664 | int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb); |
d511337a JP |
1665 | int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
1666 | u8 **prevhdr); | |
1da177e4 LT |
1667 | |
1668 | #ifdef CONFIG_XFRM | |
d511337a JP |
1669 | int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1670 | int xfrm_user_policy(struct sock *sk, int optname, | |
1671 | u8 __user *optval, int optlen); | |
1da177e4 LT |
1672 | #else |
1673 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1674 | { | |
1675 | return -ENOPROTOOPT; | |
82695b30 | 1676 | } |
1da177e4 | 1677 | |
067b207b | 1678 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
1679 | { |
1680 | /* should not happen */ | |
1681 | kfree_skb(skb); | |
1682 | return 0; | |
1683 | } | |
1da177e4 LT |
1684 | #endif |
1685 | ||
d77e38e6 SK |
1686 | struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif, |
1687 | const xfrm_address_t *saddr, | |
1688 | const xfrm_address_t *daddr, | |
077fbac4 | 1689 | int family, u32 mark); |
d77e38e6 | 1690 | |
0331b1f3 | 1691 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
4c563f76 | 1692 | |
d511337a JP |
1693 | void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
1694 | int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, | |
1695 | int (*func)(struct xfrm_policy *, int, int, void*), | |
1696 | void *); | |
283bc9f3 | 1697 | void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); |
1da177e4 | 1698 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
7e652640 | 1699 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, u32 if_id, |
8ca2e93b | 1700 | u8 type, int dir, |
4e81bb83 | 1701 | struct xfrm_selector *sel, |
ef41aaa0 EP |
1702 | struct xfrm_sec_ctx *ctx, int delete, |
1703 | int *err); | |
7e652640 SK |
1704 | struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u32 if_id, u8, |
1705 | int dir, u32 id, int delete, int *err); | |
2e71029e | 1706 | int xfrm_policy_flush(struct net *net, u8 type, bool task_valid); |
880a6fab | 1707 | void xfrm_policy_hash_rebuild(struct net *net); |
1da177e4 | 1708 | u32 xfrm_get_acqseq(void); |
776e9dd9 | 1709 | int verify_spi_info(u8 proto, u32 min, u32 max); |
d511337a | 1710 | int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
e473fcb4 | 1711 | struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, |
7e652640 | 1712 | u8 mode, u32 reqid, u32 if_id, u8 proto, |
a70486f0 DM |
1713 | const xfrm_address_t *daddr, |
1714 | const xfrm_address_t *saddr, int create, | |
bd55775c | 1715 | unsigned short family); |
d511337a | 1716 | int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
1da177e4 | 1717 | |
80c9abaa | 1718 | #ifdef CONFIG_XFRM_MIGRATE |
d511337a JP |
1719 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1720 | const struct xfrm_migrate *m, int num_bundles, | |
8bafd730 AA |
1721 | const struct xfrm_kmaddress *k, |
1722 | const struct xfrm_encap_tmpl *encap); | |
283bc9f3 | 1723 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net); |
d511337a | 1724 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
4ab47d47 AA |
1725 | struct xfrm_migrate *m, |
1726 | struct xfrm_encap_tmpl *encap); | |
d511337a JP |
1727 | int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1728 | struct xfrm_migrate *m, int num_bundles, | |
4ab47d47 AA |
1729 | struct xfrm_kmaddress *k, struct net *net, |
1730 | struct xfrm_encap_tmpl *encap); | |
80c9abaa SS |
1731 | #endif |
1732 | ||
d511337a JP |
1733 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
1734 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); | |
1735 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, | |
1736 | xfrm_address_t *addr); | |
1737 | ||
1738 | void xfrm_input_init(void); | |
1739 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); | |
1740 | ||
1741 | void xfrm_probe_algs(void); | |
1742 | int xfrm_count_pfkey_auth_supported(void); | |
1743 | int xfrm_count_pfkey_enc_supported(void); | |
1744 | struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1745 | struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1746 | struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1747 | struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1748 | struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1749 | struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); | |
1750 | struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); | |
1751 | struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); | |
1752 | struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, | |
1753 | int probe); | |
1da177e4 | 1754 | |
70e94e66 YH |
1755 | static inline bool xfrm6_addr_equal(const xfrm_address_t *a, |
1756 | const xfrm_address_t *b) | |
1757 | { | |
1758 | return ipv6_addr_equal((const struct in6_addr *)a, | |
1759 | (const struct in6_addr *)b); | |
1760 | } | |
1761 | ||
1762 | static inline bool xfrm_addr_equal(const xfrm_address_t *a, | |
1763 | const xfrm_address_t *b, | |
1764 | sa_family_t family) | |
1da177e4 LT |
1765 | { |
1766 | switch (family) { | |
1767 | default: | |
1768 | case AF_INET: | |
70e94e66 | 1769 | return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; |
1da177e4 | 1770 | case AF_INET6: |
70e94e66 | 1771 | return xfrm6_addr_equal(a, b); |
1da177e4 LT |
1772 | } |
1773 | } | |
1774 | ||
77d8d7a6 HX |
1775 | static inline int xfrm_policy_id2dir(u32 index) |
1776 | { | |
1777 | return index & 7; | |
1778 | } | |
1779 | ||
a6483b79 AD |
1780 | #ifdef CONFIG_XFRM |
1781 | static inline int xfrm_aevent_is_on(struct net *net) | |
f8cd5488 | 1782 | { |
be33690d PM |
1783 | struct sock *nlsk; |
1784 | int ret = 0; | |
1785 | ||
1786 | rcu_read_lock(); | |
a6483b79 | 1787 | nlsk = rcu_dereference(net->xfrm.nlsk); |
be33690d PM |
1788 | if (nlsk) |
1789 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1790 | rcu_read_unlock(); | |
1791 | return ret; | |
f8cd5488 | 1792 | } |
0f24558e HG |
1793 | |
1794 | static inline int xfrm_acquire_is_on(struct net *net) | |
1795 | { | |
1796 | struct sock *nlsk; | |
1797 | int ret = 0; | |
1798 | ||
1799 | rcu_read_lock(); | |
1800 | nlsk = rcu_dereference(net->xfrm.nlsk); | |
1801 | if (nlsk) | |
1802 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE); | |
1803 | rcu_read_unlock(); | |
1804 | ||
1805 | return ret; | |
1806 | } | |
a6483b79 | 1807 | #endif |
f8cd5488 | 1808 | |
373b8eeb | 1809 | static inline unsigned int aead_len(struct xfrm_algo_aead *alg) |
ee5c2317 SK |
1810 | { |
1811 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1812 | } | |
1813 | ||
06cd22f8 | 1814 | static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg) |
0f99be0d ED |
1815 | { |
1816 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1817 | } | |
1818 | ||
1bd963a7 | 1819 | static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) |
4447bb33 MW |
1820 | { |
1821 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1822 | } | |
1823 | ||
5e708e47 | 1824 | static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) |
9736acf3 SK |
1825 | { |
1826 | return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); | |
1827 | } | |
1828 | ||
80c9abaa | 1829 | #ifdef CONFIG_XFRM_MIGRATE |
af2f464e SK |
1830 | static inline int xfrm_replay_clone(struct xfrm_state *x, |
1831 | struct xfrm_state *orig) | |
1832 | { | |
1833 | x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), | |
1834 | GFP_KERNEL); | |
1835 | if (!x->replay_esn) | |
1836 | return -ENOMEM; | |
1837 | ||
1838 | x->replay_esn->bmp_len = orig->replay_esn->bmp_len; | |
1839 | x->replay_esn->replay_window = orig->replay_esn->replay_window; | |
1840 | ||
1841 | x->preplay_esn = kmemdup(x->replay_esn, | |
1842 | xfrm_replay_state_esn_len(x->replay_esn), | |
1843 | GFP_KERNEL); | |
1844 | if (!x->preplay_esn) { | |
1845 | kfree(x->replay_esn); | |
1846 | return -ENOMEM; | |
1847 | } | |
1848 | ||
1849 | return 0; | |
1850 | } | |
1851 | ||
ee5c2317 SK |
1852 | static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig) |
1853 | { | |
1854 | return kmemdup(orig, aead_len(orig), GFP_KERNEL); | |
1855 | } | |
1856 | ||
1857 | ||
80c9abaa SS |
1858 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
1859 | { | |
0f99be0d | 1860 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
80c9abaa SS |
1861 | } |
1862 | ||
4447bb33 MW |
1863 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
1864 | { | |
1865 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); | |
1866 | } | |
1867 | ||
80c9abaa SS |
1868 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
1869 | { | |
1870 | int i; | |
1871 | for (i = 0; i < n; i++) | |
1872 | xfrm_state_put(*(states + i)); | |
1873 | } | |
1874 | ||
1875 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1876 | { | |
1877 | int i; | |
1878 | for (i = 0; i < n; i++) | |
1879 | xfrm_state_delete(*(states + i)); | |
1880 | } | |
1881 | #endif | |
f8cd5488 | 1882 | |
def8b4fa | 1883 | #ifdef CONFIG_XFRM |
00501121 HX |
1884 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
1885 | { | |
2294be0f FW |
1886 | struct sec_path *sp = skb_sec_path(skb); |
1887 | ||
1888 | return sp->xvec[sp->len - 1]; | |
00501121 | 1889 | } |
f53c7239 SK |
1890 | #endif |
1891 | ||
54ef207a SK |
1892 | static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb) |
1893 | { | |
f53c7239 | 1894 | #ifdef CONFIG_XFRM |
2294be0f | 1895 | struct sec_path *sp = skb_sec_path(skb); |
54ef207a SK |
1896 | |
1897 | if (!sp || !sp->olen || sp->len != sp->olen) | |
1898 | return NULL; | |
1899 | ||
1900 | return &sp->ovec[sp->olen - 1]; | |
f53c7239 SK |
1901 | #else |
1902 | return NULL; | |
def8b4fa | 1903 | #endif |
f53c7239 | 1904 | } |
00501121 | 1905 | |
e9a441b6 | 1906 | void __init xfrm_dev_init(void); |
b81f884a HL |
1907 | |
1908 | #ifdef CONFIG_XFRM_OFFLOAD | |
f53c7239 SK |
1909 | void xfrm_dev_resume(struct sk_buff *skb); |
1910 | void xfrm_dev_backlog(struct softnet_data *sd); | |
1911 | struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again); | |
d77e38e6 SK |
1912 | int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, |
1913 | struct xfrm_user_offload *xuo); | |
1914 | bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x); | |
1915 | ||
50bd870a YE |
1916 | static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x) |
1917 | { | |
1918 | struct xfrm_state_offload *xso = &x->xso; | |
1919 | ||
1920 | if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn) | |
1921 | xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x); | |
1922 | } | |
1923 | ||
f70f250a SK |
1924 | static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) |
1925 | { | |
1926 | struct xfrm_state *x = dst->xfrm; | |
b6ca8bd5 | 1927 | struct xfrm_dst *xdst; |
f70f250a SK |
1928 | |
1929 | if (!x || !x->type_offload) | |
1930 | return false; | |
1931 | ||
b6ca8bd5 | 1932 | xdst = (struct xfrm_dst *) dst; |
2271d519 SK |
1933 | if (!x->xso.offload_handle && !xdst->child->xfrm) |
1934 | return true; | |
0f6c480f | 1935 | if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) && |
b6ca8bd5 | 1936 | !xdst->child->xfrm) |
f70f250a SK |
1937 | return true; |
1938 | ||
1939 | return false; | |
1940 | } | |
1941 | ||
d77e38e6 SK |
1942 | static inline void xfrm_dev_state_delete(struct xfrm_state *x) |
1943 | { | |
1944 | struct xfrm_state_offload *xso = &x->xso; | |
1945 | ||
1946 | if (xso->dev) | |
1947 | xso->dev->xfrmdev_ops->xdo_dev_state_delete(x); | |
1948 | } | |
1949 | ||
1950 | static inline void xfrm_dev_state_free(struct xfrm_state *x) | |
1951 | { | |
1952 | struct xfrm_state_offload *xso = &x->xso; | |
77990464 | 1953 | struct net_device *dev = xso->dev; |
d77e38e6 SK |
1954 | |
1955 | if (dev && dev->xfrmdev_ops) { | |
7f05b467 SN |
1956 | if (dev->xfrmdev_ops->xdo_dev_state_free) |
1957 | dev->xfrmdev_ops->xdo_dev_state_free(x); | |
d77e38e6 SK |
1958 | xso->dev = NULL; |
1959 | dev_put(dev); | |
1960 | } | |
1961 | } | |
1962 | #else | |
f53c7239 SK |
1963 | static inline void xfrm_dev_resume(struct sk_buff *skb) |
1964 | { | |
1965 | } | |
1966 | ||
1967 | static inline void xfrm_dev_backlog(struct softnet_data *sd) | |
1968 | { | |
1969 | } | |
1970 | ||
1971 | static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again) | |
f6e27114 | 1972 | { |
3dca3f38 | 1973 | return skb; |
f6e27114 SK |
1974 | } |
1975 | ||
d77e38e6 SK |
1976 | static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo) |
1977 | { | |
1978 | return 0; | |
1979 | } | |
1980 | ||
1981 | static inline void xfrm_dev_state_delete(struct xfrm_state *x) | |
1982 | { | |
1983 | } | |
1984 | ||
1985 | static inline void xfrm_dev_state_free(struct xfrm_state *x) | |
1986 | { | |
1987 | } | |
1988 | ||
1989 | static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x) | |
1990 | { | |
1991 | return false; | |
1992 | } | |
f70f250a | 1993 | |
50bd870a YE |
1994 | static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x) |
1995 | { | |
1996 | } | |
1997 | ||
f70f250a SK |
1998 | static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) |
1999 | { | |
2000 | return false; | |
2001 | } | |
d77e38e6 SK |
2002 | #endif |
2003 | ||
bf825f81 JHS |
2004 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
2005 | { | |
2006 | if (attrs[XFRMA_MARK]) | |
4efd7e83 | 2007 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
bf825f81 JHS |
2008 | else |
2009 | m->v = m->m = 0; | |
2010 | ||
2011 | return m->v & m->m; | |
2012 | } | |
2013 | ||
e3dfa389 | 2014 | static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) |
bf825f81 | 2015 | { |
1d1e34dd | 2016 | int ret = 0; |
bf825f81 | 2017 | |
1d1e34dd DM |
2018 | if (m->m | m->v) |
2019 | ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); | |
2020 | return ret; | |
bf825f81 JHS |
2021 | } |
2022 | ||
9b42c1f1 SK |
2023 | static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x) |
2024 | { | |
2025 | struct xfrm_mark *m = &x->props.smark; | |
2026 | ||
2027 | return (m->v & m->m) | (mark & ~m->m); | |
2028 | } | |
2029 | ||
7e652640 SK |
2030 | static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id) |
2031 | { | |
2032 | int ret = 0; | |
2033 | ||
2034 | if (if_id) | |
2035 | ret = nla_put_u32(skb, XFRMA_IF_ID, if_id); | |
2036 | return ret; | |
2037 | } | |
2038 | ||
70be6c91 SK |
2039 | static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, |
2040 | unsigned int family) | |
2041 | { | |
2042 | bool tunnel = false; | |
2043 | ||
2044 | switch(family) { | |
2045 | case AF_INET: | |
2046 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) | |
2047 | tunnel = true; | |
2048 | break; | |
2049 | case AF_INET6: | |
2050 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) | |
2051 | tunnel = true; | |
2052 | break; | |
2053 | } | |
2054 | if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL)) | |
2055 | return -EINVAL; | |
2056 | ||
2057 | return 0; | |
2058 | } | |
1da177e4 | 2059 | #endif /* _NET_XFRM_H */ |