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1da177e4 LT |
1 | #ifndef _NET_XFRM_H |
2 | #define _NET_XFRM_H | |
3 | ||
aabc9761 | 4 | #include <linux/compiler.h> |
1da177e4 LT |
5 | #include <linux/xfrm.h> |
6 | #include <linux/spinlock.h> | |
7 | #include <linux/list.h> | |
8 | #include <linux/skbuff.h> | |
14c85021 | 9 | #include <linux/socket.h> |
1da177e4 | 10 | #include <linux/pfkeyv2.h> |
5794708f | 11 | #include <linux/ipsec.h> |
1da177e4 | 12 | #include <linux/in6.h> |
4a3e2f71 | 13 | #include <linux/mutex.h> |
ab5f5e8b | 14 | #include <linux/audit.h> |
5a0e3ad6 | 15 | #include <linux/slab.h> |
1da177e4 LT |
16 | |
17 | #include <net/sock.h> | |
18 | #include <net/dst.h> | |
436a0a40 | 19 | #include <net/ip.h> |
1da177e4 LT |
20 | #include <net/route.h> |
21 | #include <net/ipv6.h> | |
22 | #include <net/ip6_fib.h> | |
fe1a5f03 | 23 | #include <net/flow.h> |
9e0d57fd YP |
24 | |
25 | #include <linux/interrupt.h> | |
26 | ||
558f82ef MN |
27 | #ifdef CONFIG_XFRM_STATISTICS |
28 | #include <net/snmp.h> | |
29 | #endif | |
1da177e4 | 30 | |
d3d6dd3a MN |
31 | #define XFRM_PROTO_ESP 50 |
32 | #define XFRM_PROTO_AH 51 | |
33 | #define XFRM_PROTO_COMP 108 | |
34 | #define XFRM_PROTO_IPIP 4 | |
35 | #define XFRM_PROTO_IPV6 41 | |
36 | #define XFRM_PROTO_ROUTING IPPROTO_ROUTING | |
37 | #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS | |
38 | ||
fa9921e4 | 39 | #define XFRM_ALIGN4(len) (((len) + 3) & ~3) |
1da177e4 | 40 | #define XFRM_ALIGN8(len) (((len) + 7) & ~7) |
b59f45d0 HX |
41 | #define MODULE_ALIAS_XFRM_MODE(family, encap) \ |
42 | MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) | |
d3d6dd3a MN |
43 | #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ |
44 | MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) | |
1da177e4 | 45 | |
558f82ef | 46 | #ifdef CONFIG_XFRM_STATISTICS |
59c9940e AD |
47 | #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) |
48 | #define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field) | |
49 | #define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field) | |
558f82ef | 50 | #else |
59c9940e AD |
51 | #define XFRM_INC_STATS(net, field) ((void)(net)) |
52 | #define XFRM_INC_STATS_BH(net, field) ((void)(net)) | |
53 | #define XFRM_INC_STATS_USER(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; | |
121 | union { | |
122 | u8 dying; | |
123 | u8 proto; | |
124 | }; | |
125 | u32 seq; | |
126 | }; | |
127 | ||
1da177e4 | 128 | /* Full description of state of transformer. */ |
fd2c3ef7 | 129 | struct xfrm_state { |
673c09be AD |
130 | #ifdef CONFIG_NET_NS |
131 | struct net *xs_net; | |
132 | #endif | |
abb81c4f | 133 | union { |
12a169e7 | 134 | struct hlist_node gclist; |
abb81c4f HX |
135 | struct hlist_node bydst; |
136 | }; | |
8f126e37 DM |
137 | struct hlist_node bysrc; |
138 | struct hlist_node byspi; | |
1da177e4 LT |
139 | |
140 | atomic_t refcnt; | |
141 | spinlock_t lock; | |
142 | ||
143 | struct xfrm_id id; | |
144 | struct xfrm_selector sel; | |
bf825f81 | 145 | struct xfrm_mark mark; |
35d2856b | 146 | u32 tfcpad; |
1da177e4 | 147 | |
9d4a706d DM |
148 | u32 genid; |
149 | ||
12a169e7 HX |
150 | /* Key manager bits */ |
151 | struct xfrm_state_walk km; | |
1da177e4 LT |
152 | |
153 | /* Parameters of this state. */ | |
154 | struct { | |
155 | u32 reqid; | |
156 | u8 mode; | |
157 | u8 replay_window; | |
158 | u8 aalgo, ealgo, calgo; | |
159 | u8 flags; | |
160 | u16 family; | |
161 | xfrm_address_t saddr; | |
162 | int header_len; | |
163 | int trailer_len; | |
a947b0a9 | 164 | u32 extra_flags; |
1da177e4 LT |
165 | } props; |
166 | ||
167 | struct xfrm_lifetime_cfg lft; | |
168 | ||
169 | /* Data for transformer */ | |
4447bb33 | 170 | struct xfrm_algo_auth *aalg; |
1da177e4 LT |
171 | struct xfrm_algo *ealg; |
172 | struct xfrm_algo *calg; | |
1a6509d9 | 173 | struct xfrm_algo_aead *aead; |
1da177e4 LT |
174 | |
175 | /* Data for encapsulator */ | |
176 | struct xfrm_encap_tmpl *encap; | |
177 | ||
060f02a3 NT |
178 | /* Data for care-of address */ |
179 | xfrm_address_t *coaddr; | |
180 | ||
1da177e4 LT |
181 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
182 | struct xfrm_state *tunnel; | |
183 | ||
184 | /* If a tunnel, number of users + 1 */ | |
185 | atomic_t tunnel_users; | |
186 | ||
187 | /* State for replay detection */ | |
188 | struct xfrm_replay_state replay; | |
9736acf3 | 189 | struct xfrm_replay_state_esn *replay_esn; |
1da177e4 | 190 | |
f8cd5488 JHS |
191 | /* Replay detection state at the time we sent the last notification */ |
192 | struct xfrm_replay_state preplay; | |
9736acf3 | 193 | struct xfrm_replay_state_esn *preplay_esn; |
f8cd5488 | 194 | |
9fdc4883 SK |
195 | /* The functions for replay detection. */ |
196 | struct xfrm_replay *repl; | |
197 | ||
2717096a JHS |
198 | /* internal flag that only holds state for delayed aevent at the |
199 | * moment | |
200 | */ | |
201 | u32 xflags; | |
202 | ||
f8cd5488 JHS |
203 | /* Replay detection notification settings */ |
204 | u32 replay_maxage; | |
205 | u32 replay_maxdiff; | |
206 | ||
207 | /* Replay detection notification timer */ | |
208 | struct timer_list rtimer; | |
209 | ||
1da177e4 LT |
210 | /* Statistics */ |
211 | struct xfrm_stats stats; | |
212 | ||
213 | struct xfrm_lifetime_cur curlft; | |
9e0d57fd | 214 | struct tasklet_hrtimer mtimer; |
1da177e4 | 215 | |
e3c0d047 FD |
216 | /* used to fix curlft->add_time when changing date */ |
217 | long saved_tmo; | |
218 | ||
9afaca05 | 219 | /* Last used time */ |
d26f3984 | 220 | unsigned long lastused; |
9afaca05 | 221 | |
1da177e4 LT |
222 | /* Reference to data common to all the instances of this |
223 | * transformer. */ | |
533cb5b0 | 224 | const struct xfrm_type *type; |
13996378 | 225 | struct xfrm_mode *inner_mode; |
df9dcb45 | 226 | struct xfrm_mode *inner_mode_iaf; |
13996378 | 227 | struct xfrm_mode *outer_mode; |
1da177e4 | 228 | |
df71837d TJ |
229 | /* Security context */ |
230 | struct xfrm_sec_ctx *security; | |
231 | ||
1da177e4 LT |
232 | /* Private data of this transformer, format is opaque, |
233 | * interpreted by xfrm_type methods. */ | |
234 | void *data; | |
235 | }; | |
236 | ||
673c09be AD |
237 | static inline struct net *xs_net(struct xfrm_state *x) |
238 | { | |
239 | return read_pnet(&x->xs_net); | |
240 | } | |
241 | ||
2717096a JHS |
242 | /* xflags - make enum if more show up */ |
243 | #define XFRM_TIME_DEFER 1 | |
e3c0d047 | 244 | #define XFRM_SOFT_EXPIRE 2 |
2717096a | 245 | |
1da177e4 LT |
246 | enum { |
247 | XFRM_STATE_VOID, | |
248 | XFRM_STATE_ACQ, | |
249 | XFRM_STATE_VALID, | |
250 | XFRM_STATE_ERROR, | |
251 | XFRM_STATE_EXPIRED, | |
252 | XFRM_STATE_DEAD | |
253 | }; | |
254 | ||
26b15dad | 255 | /* callback structure passed from either netlink or pfkey */ |
fd2c3ef7 | 256 | struct km_event { |
bf08867f HX |
257 | union { |
258 | u32 hard; | |
259 | u32 proto; | |
260 | u32 byid; | |
f8cd5488 | 261 | u32 aevent; |
f7b6983f | 262 | u32 type; |
bf08867f HX |
263 | } data; |
264 | ||
26b15dad | 265 | u32 seq; |
15e47304 | 266 | u32 portid; |
26b15dad | 267 | u32 event; |
7067802e | 268 | struct net *net; |
26b15dad JHS |
269 | }; |
270 | ||
9fdc4883 SK |
271 | struct xfrm_replay { |
272 | void (*advance)(struct xfrm_state *x, __be32 net_seq); | |
273 | int (*check)(struct xfrm_state *x, | |
274 | struct sk_buff *skb, | |
275 | __be32 net_seq); | |
3b59df46 SK |
276 | int (*recheck)(struct xfrm_state *x, |
277 | struct sk_buff *skb, | |
278 | __be32 net_seq); | |
9fdc4883 SK |
279 | void (*notify)(struct xfrm_state *x, int event); |
280 | int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); | |
281 | }; | |
282 | ||
25ee3286 | 283 | struct net_device; |
1da177e4 LT |
284 | struct xfrm_type; |
285 | struct xfrm_dst; | |
286 | struct xfrm_policy_afinfo { | |
287 | unsigned short family; | |
1da177e4 | 288 | struct dst_ops *dst_ops; |
ddcfd796 | 289 | void (*garbage_collect)(struct net *net); |
c5b3cf46 | 290 | struct dst_entry *(*dst_lookup)(struct net *net, int tos, |
5e6b930f DM |
291 | const xfrm_address_t *saddr, |
292 | const xfrm_address_t *daddr); | |
fbda33b2 | 293 | int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr); |
1da177e4 | 294 | void (*decode_session)(struct sk_buff *skb, |
d5422efe HX |
295 | struct flowi *fl, |
296 | int reverse); | |
05d84025 | 297 | int (*get_tos)(const struct flowi *fl); |
9d7b0fc1 PM |
298 | void (*init_dst)(struct net *net, |
299 | struct xfrm_dst *dst); | |
a1b05140 MN |
300 | int (*init_path)(struct xfrm_dst *path, |
301 | struct dst_entry *dst, | |
302 | int nfheader_len); | |
25ee3286 | 303 | int (*fill_dst)(struct xfrm_dst *xdst, |
87c1e12b | 304 | struct net_device *dev, |
0c7b3eef | 305 | const struct flowi *fl); |
2774c131 | 306 | struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); |
1da177e4 LT |
307 | }; |
308 | ||
d511337a JP |
309 | int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); |
310 | int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); | |
311 | void km_policy_notify(struct xfrm_policy *xp, int dir, | |
312 | const struct km_event *c); | |
313 | void km_state_notify(struct xfrm_state *x, const struct km_event *c); | |
1da177e4 LT |
314 | |
315 | struct xfrm_tmpl; | |
d511337a JP |
316 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, |
317 | struct xfrm_policy *pol); | |
318 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); | |
319 | int __xfrm_state_delete(struct xfrm_state *x); | |
53bc6b4d | 320 | |
1da177e4 | 321 | struct xfrm_state_afinfo { |
17c2a42a | 322 | unsigned int family; |
36cf9acf | 323 | unsigned int proto; |
8e3d716c | 324 | __be16 eth_proto; |
17c2a42a | 325 | struct module *owner; |
533cb5b0 | 326 | const struct xfrm_type *type_map[IPPROTO_MAX]; |
aa5d62cc | 327 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; |
d094cd83 | 328 | int (*init_flags)(struct xfrm_state *x); |
73e5ebb2 DM |
329 | void (*init_tempsel)(struct xfrm_selector *sel, |
330 | const struct flowi *fl); | |
19bd6244 DM |
331 | void (*init_temprop)(struct xfrm_state *x, |
332 | const struct xfrm_tmpl *tmpl, | |
333 | const xfrm_address_t *daddr, | |
334 | const xfrm_address_t *saddr); | |
41a49cc3 MN |
335 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
336 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); | |
cdca7265 | 337 | int (*output)(struct sk_buff *skb); |
43a4dea4 | 338 | int (*output_finish)(struct sk_buff *skb); |
227620e2 HX |
339 | int (*extract_input)(struct xfrm_state *x, |
340 | struct sk_buff *skb); | |
36cf9acf HX |
341 | int (*extract_output)(struct xfrm_state *x, |
342 | struct sk_buff *skb); | |
716062fd HX |
343 | int (*transport_finish)(struct sk_buff *skb, |
344 | int async); | |
628e341f | 345 | void (*local_error)(struct sk_buff *skb, u32 mtu); |
1da177e4 LT |
346 | }; |
347 | ||
d511337a JP |
348 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); |
349 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
350 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); | |
351 | void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); | |
1da177e4 | 352 | |
d511337a | 353 | void xfrm_state_delete_tunnel(struct xfrm_state *x); |
1da177e4 | 354 | |
fd2c3ef7 | 355 | struct xfrm_type { |
1da177e4 LT |
356 | char *description; |
357 | struct module *owner; | |
a6337463 | 358 | u8 proto; |
359 | u8 flags; | |
1b5c2299 | 360 | #define XFRM_TYPE_NON_FRAGMENT 1 |
436a0a40 | 361 | #define XFRM_TYPE_REPLAY_PROT 2 |
f04e7e8d HX |
362 | #define XFRM_TYPE_LOCAL_COADDR 4 |
363 | #define XFRM_TYPE_REMOTE_COADDR 8 | |
1da177e4 | 364 | |
72cb6962 | 365 | int (*init_state)(struct xfrm_state *x); |
1da177e4 | 366 | void (*destructor)(struct xfrm_state *); |
e695633e | 367 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 368 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
8f029de2 DM |
369 | int (*reject)(struct xfrm_state *, struct sk_buff *, |
370 | const struct flowi *); | |
aee5adb4 | 371 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
1da177e4 | 372 | /* Estimate maximal size of result of transformation of a dgram */ |
c5c25238 | 373 | u32 (*get_mtu)(struct xfrm_state *, int size); |
1da177e4 LT |
374 | }; |
375 | ||
d511337a JP |
376 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
377 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); | |
1da177e4 | 378 | |
b59f45d0 | 379 | struct xfrm_mode { |
227620e2 HX |
380 | /* |
381 | * Remove encapsulation header. | |
382 | * | |
383 | * The IP header will be moved over the top of the encapsulation | |
384 | * header. | |
385 | * | |
386 | * On entry, the transport header shall point to where the IP header | |
387 | * should be and the network header shall be set to where the IP | |
388 | * header currently is. skb->data shall point to the start of the | |
389 | * payload. | |
390 | */ | |
391 | int (*input2)(struct xfrm_state *x, struct sk_buff *skb); | |
392 | ||
393 | /* | |
394 | * This is the actual input entry point. | |
395 | * | |
396 | * For transport mode and equivalent this would be identical to | |
397 | * input2 (which does not need to be set). While tunnel mode | |
398 | * and equivalent would set this to the tunnel encapsulation function | |
399 | * xfrm4_prepare_input that would in turn call input2. | |
400 | */ | |
b59f45d0 | 401 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); |
37fedd3a HX |
402 | |
403 | /* | |
404 | * Add encapsulation header. | |
405 | * | |
406 | * On exit, the transport header will be set to the start of the | |
407 | * encapsulation header to be filled in by x->type->output and | |
408 | * the mac header will be set to the nextheader (protocol for | |
409 | * IPv4) field of the extension header directly preceding the | |
410 | * encapsulation header, or in its absence, that of the top IP | |
411 | * header. The value of the network header will always point | |
412 | * to the top IP header while skb->data will point to the payload. | |
413 | */ | |
36cf9acf HX |
414 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); |
415 | ||
416 | /* | |
417 | * This is the actual output entry point. | |
418 | * | |
419 | * For transport mode and equivalent this would be identical to | |
420 | * output2 (which does not need to be set). While tunnel mode | |
421 | * and equivalent would set this to a tunnel encapsulation function | |
422 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn | |
423 | * call output2. | |
424 | */ | |
425 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); | |
b59f45d0 | 426 | |
17c2a42a | 427 | struct xfrm_state_afinfo *afinfo; |
b59f45d0 HX |
428 | struct module *owner; |
429 | unsigned int encap; | |
1bfcb10f HX |
430 | int flags; |
431 | }; | |
432 | ||
433 | /* Flags for xfrm_mode. */ | |
434 | enum { | |
435 | XFRM_MODE_FLAG_TUNNEL = 1, | |
b59f45d0 HX |
436 | }; |
437 | ||
d511337a JP |
438 | int xfrm_register_mode(struct xfrm_mode *mode, int family); |
439 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family); | |
b59f45d0 | 440 | |
df9dcb45 KM |
441 | static inline int xfrm_af2proto(unsigned int family) |
442 | { | |
443 | switch(family) { | |
444 | case AF_INET: | |
445 | return IPPROTO_IPIP; | |
446 | case AF_INET6: | |
447 | return IPPROTO_IPV6; | |
448 | default: | |
449 | return 0; | |
450 | } | |
451 | } | |
452 | ||
453 | static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) | |
454 | { | |
455 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || | |
456 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) | |
457 | return x->inner_mode; | |
458 | else | |
459 | return x->inner_mode_iaf; | |
460 | } | |
461 | ||
fd2c3ef7 | 462 | struct xfrm_tmpl { |
1da177e4 LT |
463 | /* id in template is interpreted as: |
464 | * daddr - destination of tunnel, may be zero for transport mode. | |
465 | * spi - zero to acquire spi. Not zero if spi is static, then | |
466 | * daddr must be fixed too. | |
467 | * proto - AH/ESP/IPCOMP | |
468 | */ | |
469 | struct xfrm_id id; | |
470 | ||
471 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
472 | xfrm_address_t saddr; | |
473 | ||
76b3f055 MK |
474 | unsigned short encap_family; |
475 | ||
a6337463 | 476 | u32 reqid; |
1da177e4 | 477 | |
7e49e6de | 478 | /* Mode: transport, tunnel etc. */ |
a6337463 | 479 | u8 mode; |
1da177e4 LT |
480 | |
481 | /* Sharing mode: unique, this session only, this user only etc. */ | |
a6337463 | 482 | u8 share; |
1da177e4 LT |
483 | |
484 | /* May skip this transfomration if no SA is found */ | |
a6337463 | 485 | u8 optional; |
1da177e4 | 486 | |
c5d18e98 | 487 | /* Skip aalgos/ealgos/calgos checks. */ |
a6337463 | 488 | u8 allalgs; |
c5d18e98 | 489 | |
1da177e4 | 490 | /* Bit mask of algos allowed for acquisition */ |
a6337463 | 491 | u32 aalgos; |
492 | u32 ealgos; | |
493 | u32 calgos; | |
1da177e4 LT |
494 | }; |
495 | ||
622dc828 | 496 | #define XFRM_MAX_DEPTH 6 |
1da177e4 | 497 | |
12a169e7 HX |
498 | struct xfrm_policy_walk_entry { |
499 | struct list_head all; | |
500 | u8 dead; | |
501 | }; | |
502 | ||
503 | struct xfrm_policy_walk { | |
504 | struct xfrm_policy_walk_entry walk; | |
505 | u8 type; | |
506 | u32 seq; | |
507 | }; | |
508 | ||
a0073fe1 SK |
509 | struct xfrm_policy_queue { |
510 | struct sk_buff_head hold_queue; | |
511 | struct timer_list hold_timer; | |
512 | unsigned long timeout; | |
513 | }; | |
514 | ||
fd2c3ef7 | 515 | struct xfrm_policy { |
0331b1f3 AD |
516 | #ifdef CONFIG_NET_NS |
517 | struct net *xp_net; | |
518 | #endif | |
2518c7c2 DM |
519 | struct hlist_node bydst; |
520 | struct hlist_node byidx; | |
1da177e4 LT |
521 | |
522 | /* This lock only affects elements except for entry. */ | |
523 | rwlock_t lock; | |
524 | atomic_t refcnt; | |
525 | struct timer_list timer; | |
526 | ||
fe1a5f03 | 527 | struct flow_cache_object flo; |
80c802f3 | 528 | atomic_t genid; |
1da177e4 LT |
529 | u32 priority; |
530 | u32 index; | |
bf825f81 | 531 | struct xfrm_mark mark; |
1da177e4 LT |
532 | struct xfrm_selector selector; |
533 | struct xfrm_lifetime_cfg lft; | |
534 | struct xfrm_lifetime_cur curlft; | |
12a169e7 | 535 | struct xfrm_policy_walk_entry walk; |
a0073fe1 | 536 | struct xfrm_policy_queue polq; |
46ca5f5d ACM |
537 | u8 type; |
538 | u8 action; | |
539 | u8 flags; | |
46ca5f5d | 540 | u8 xfrm_nr; |
12a169e7 | 541 | u16 family; |
df71837d | 542 | struct xfrm_sec_ctx *security; |
1da177e4 LT |
543 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
544 | }; | |
545 | ||
63eb23f5 | 546 | static inline struct net *xp_net(const struct xfrm_policy *xp) |
0331b1f3 AD |
547 | { |
548 | return read_pnet(&xp->xp_net); | |
549 | } | |
550 | ||
13c1d189 AE |
551 | struct xfrm_kmaddress { |
552 | xfrm_address_t local; | |
553 | xfrm_address_t remote; | |
554 | u32 reserved; | |
555 | u16 family; | |
556 | }; | |
557 | ||
80c9abaa SS |
558 | struct xfrm_migrate { |
559 | xfrm_address_t old_daddr; | |
560 | xfrm_address_t old_saddr; | |
561 | xfrm_address_t new_daddr; | |
562 | xfrm_address_t new_saddr; | |
563 | u8 proto; | |
564 | u8 mode; | |
565 | u16 reserved; | |
566 | u32 reqid; | |
567 | u16 old_family; | |
568 | u16 new_family; | |
569 | }; | |
570 | ||
f8cd5488 | 571 | #define XFRM_KM_TIMEOUT 30 |
f8cd5488 JHS |
572 | /* what happened */ |
573 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
574 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
575 | ||
576 | /* default aevent timeout in units of 100ms */ | |
577 | #define XFRM_AE_ETIME 10 | |
578 | /* Async Event timer multiplier */ | |
579 | #define XFRM_AE_ETH_M 10 | |
580 | /* default seq threshold size */ | |
581 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 | 582 | |
fd2c3ef7 | 583 | struct xfrm_mgr { |
1da177e4 LT |
584 | struct list_head list; |
585 | char *id; | |
214e005b | 586 | int (*notify)(struct xfrm_state *x, const struct km_event *c); |
65e0736b | 587 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); |
cb969f07 | 588 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 589 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
214e005b | 590 | int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); |
db983c11 | 591 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
183cad12 DM |
592 | int (*migrate)(const struct xfrm_selector *sel, |
593 | u8 dir, u8 type, | |
594 | const struct xfrm_migrate *m, | |
595 | int num_bundles, | |
596 | const struct xfrm_kmaddress *k); | |
1da177e4 LT |
597 | }; |
598 | ||
d511337a JP |
599 | int xfrm_register_km(struct xfrm_mgr *km); |
600 | int xfrm_unregister_km(struct xfrm_mgr *km); | |
1da177e4 | 601 | |
436a0a40 HX |
602 | /* |
603 | * This structure is used for the duration where packets are being | |
604 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
605 | * area beyond the generic IP part may be overwritten. | |
606 | */ | |
607 | struct xfrm_skb_cb { | |
608 | union { | |
609 | struct inet_skb_parm h4; | |
610 | struct inet6_skb_parm h6; | |
611 | } header; | |
612 | ||
613 | /* Sequence number for replay protection. */ | |
b318e0e4 | 614 | union { |
1ce3644a SK |
615 | struct { |
616 | __u32 low; | |
617 | __u32 hi; | |
618 | } output; | |
619 | struct { | |
620 | __be32 low; | |
621 | __be32 hi; | |
622 | } input; | |
b318e0e4 | 623 | } seq; |
436a0a40 HX |
624 | }; |
625 | ||
626 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
627 | ||
36cf9acf HX |
628 | /* |
629 | * This structure is used by the afinfo prepare_input/prepare_output functions | |
630 | * to transmit header information to the mode input/output functions. | |
631 | */ | |
632 | struct xfrm_mode_skb_cb { | |
633 | union { | |
634 | struct inet_skb_parm h4; | |
635 | struct inet6_skb_parm h6; | |
636 | } header; | |
637 | ||
638 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
639 | __be16 id; | |
640 | __be16 frag_off; | |
641 | ||
732c8bd5 HX |
642 | /* IP header length (excluding options or extension headers). */ |
643 | u8 ihl; | |
644 | ||
36cf9acf HX |
645 | /* TOS for IPv4, class for IPv6. */ |
646 | u8 tos; | |
647 | ||
648 | /* TTL for IPv4, hop limitfor IPv6. */ | |
649 | u8 ttl; | |
650 | ||
651 | /* Protocol for IPv4, NH for IPv6. */ | |
652 | u8 protocol; | |
653 | ||
732c8bd5 HX |
654 | /* Option length for IPv4, zero for IPv6. */ |
655 | u8 optlen; | |
656 | ||
36cf9acf HX |
657 | /* Used by IPv6 only, zero for IPv4. */ |
658 | u8 flow_lbl[3]; | |
659 | }; | |
660 | ||
661 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
662 | ||
716062fd HX |
663 | /* |
664 | * This structure is used by the input processing to locate the SPI and | |
665 | * related information. | |
666 | */ | |
667 | struct xfrm_spi_skb_cb { | |
668 | union { | |
669 | struct inet_skb_parm h4; | |
670 | struct inet6_skb_parm h6; | |
671 | } header; | |
672 | ||
716062fd | 673 | unsigned int daddroff; |
2fcb45b6 | 674 | unsigned int family; |
716062fd HX |
675 | }; |
676 | ||
677 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) | |
678 | ||
161a09e7 | 679 | /* Audit Information */ |
fd2c3ef7 | 680 | struct xfrm_audit { |
161a09e7 | 681 | u32 secid; |
e1760bd5 | 682 | kuid_t loginuid; |
4440e854 | 683 | unsigned int sessionid; |
161a09e7 | 684 | }; |
c9204d9c JL |
685 | |
686 | #ifdef CONFIG_AUDITSYSCALL | |
afeb14b4 | 687 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
ab5f5e8b JL |
688 | { |
689 | struct audit_buffer *audit_buf = NULL; | |
ab5f5e8b | 690 | |
afeb14b4 PM |
691 | if (audit_enabled == 0) |
692 | return NULL; | |
ab5f5e8b | 693 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, |
afeb14b4 | 694 | AUDIT_MAC_IPSEC_EVENT); |
ab5f5e8b JL |
695 | if (audit_buf == NULL) |
696 | return NULL; | |
afeb14b4 PM |
697 | audit_log_format(audit_buf, "op=%s", op); |
698 | return audit_buf; | |
699 | } | |
ab5f5e8b | 700 | |
4440e854 | 701 | static inline void xfrm_audit_helper_usrinfo(kuid_t auid, unsigned int ses, u32 secid, |
afeb14b4 PM |
702 | struct audit_buffer *audit_buf) |
703 | { | |
704 | char *secctx; | |
705 | u32 secctx_len; | |
ab5f5e8b | 706 | |
e1760bd5 EB |
707 | audit_log_format(audit_buf, " auid=%u ses=%u", |
708 | from_kuid(&init_user_ns, auid), ses); | |
68277acc PM |
709 | if (secid != 0 && |
710 | security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { | |
ab5f5e8b JL |
711 | audit_log_format(audit_buf, " subj=%s", secctx); |
712 | security_release_secctx(secctx, secctx_len); | |
713 | } else | |
714 | audit_log_task_context(audit_buf); | |
ab5f5e8b JL |
715 | } |
716 | ||
d511337a | 717 | void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, kuid_t auid, |
6dd9158a | 718 | unsigned int ses, u32 secid); |
d511337a | 719 | void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, kuid_t auid, |
6dd9158a | 720 | unsigned int ses, u32 secid); |
d511337a | 721 | void xfrm_audit_state_add(struct xfrm_state *x, int result, kuid_t auid, |
6dd9158a | 722 | unsigned int ses, u32 secid); |
d511337a | 723 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, kuid_t auid, |
6dd9158a | 724 | unsigned int ses, u32 secid); |
d511337a JP |
725 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
726 | struct sk_buff *skb); | |
727 | void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, | |
728 | __be32 net_seq); | |
729 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); | |
730 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, | |
731 | __be32 net_seq); | |
732 | void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, | |
733 | u8 proto); | |
c9204d9c | 734 | #else |
41fef0ee MS |
735 | |
736 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
4440e854 | 737 | kuid_t auid, unsigned int ses, u32 secid) |
41fef0ee MS |
738 | { |
739 | } | |
740 | ||
741 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
4440e854 | 742 | kuid_t auid, unsigned int ses, u32 secid) |
41fef0ee MS |
743 | { |
744 | } | |
745 | ||
746 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
4440e854 | 747 | kuid_t auid, unsigned int ses, u32 secid) |
41fef0ee MS |
748 | { |
749 | } | |
750 | ||
751 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
4440e854 | 752 | kuid_t auid, unsigned int ses, u32 secid) |
41fef0ee MS |
753 | { |
754 | } | |
755 | ||
756 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
757 | struct sk_buff *skb) | |
758 | { | |
759 | } | |
760 | ||
9fdc4883 SK |
761 | static inline void xfrm_audit_state_replay(struct xfrm_state *x, |
762 | struct sk_buff *skb, __be32 net_seq) | |
763 | { | |
764 | } | |
765 | ||
41fef0ee MS |
766 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, |
767 | u16 family) | |
768 | { | |
769 | } | |
770 | ||
771 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
772 | __be32 net_spi, __be32 net_seq) | |
773 | { | |
774 | } | |
775 | ||
776 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
777 | struct sk_buff *skb, u8 proto) | |
778 | { | |
779 | } | |
c9204d9c | 780 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 781 | |
1da177e4 LT |
782 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
783 | { | |
784 | if (likely(policy != NULL)) | |
785 | atomic_inc(&policy->refcnt); | |
786 | } | |
787 | ||
d511337a | 788 | void xfrm_policy_destroy(struct xfrm_policy *policy); |
1da177e4 LT |
789 | |
790 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
791 | { | |
792 | if (atomic_dec_and_test(&policy->refcnt)) | |
64c31b3f | 793 | xfrm_policy_destroy(policy); |
1da177e4 LT |
794 | } |
795 | ||
4e81bb83 MN |
796 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
797 | { | |
798 | int i; | |
799 | for (i = npols - 1; i >= 0; --i) | |
800 | xfrm_pol_put(pols[i]); | |
801 | } | |
4e81bb83 | 802 | |
d511337a | 803 | void __xfrm_state_destroy(struct xfrm_state *); |
1da177e4 | 804 | |
21380b81 HX |
805 | static inline void __xfrm_state_put(struct xfrm_state *x) |
806 | { | |
807 | atomic_dec(&x->refcnt); | |
808 | } | |
809 | ||
1da177e4 LT |
810 | static inline void xfrm_state_put(struct xfrm_state *x) |
811 | { | |
812 | if (atomic_dec_and_test(&x->refcnt)) | |
813 | __xfrm_state_destroy(x); | |
814 | } | |
815 | ||
816 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
817 | { | |
818 | atomic_inc(&x->refcnt); | |
819 | } | |
820 | ||
1744a8fe DM |
821 | static inline bool addr_match(const void *token1, const void *token2, |
822 | int prefixlen) | |
1da177e4 | 823 | { |
1744a8fe DM |
824 | const __be32 *a1 = token1; |
825 | const __be32 *a2 = token2; | |
1da177e4 LT |
826 | int pdw; |
827 | int pbi; | |
828 | ||
a6337463 | 829 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
1da177e4 LT |
830 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
831 | ||
832 | if (pdw) | |
833 | if (memcmp(a1, a2, pdw << 2)) | |
1744a8fe | 834 | return false; |
1da177e4 LT |
835 | |
836 | if (pbi) { | |
5f19343f | 837 | __be32 mask; |
1da177e4 LT |
838 | |
839 | mask = htonl((0xffffffff) << (32 - pbi)); | |
840 | ||
841 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
1744a8fe | 842 | return false; |
1da177e4 LT |
843 | } |
844 | ||
1744a8fe | 845 | return true; |
1da177e4 LT |
846 | } |
847 | ||
26bff940 AD |
848 | static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) |
849 | { | |
850 | /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ | |
851 | if (prefixlen == 0) | |
852 | return true; | |
853 | return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen))); | |
854 | } | |
855 | ||
1da177e4 | 856 | static __inline__ |
6281dcc9 | 857 | __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 858 | { |
f9d07e41 | 859 | __be16 port; |
1d28f42c | 860 | switch(fl->flowi_proto) { |
1da177e4 LT |
861 | case IPPROTO_TCP: |
862 | case IPPROTO_UDP: | |
ba4e58ec | 863 | case IPPROTO_UDPLITE: |
1da177e4 | 864 | case IPPROTO_SCTP: |
6281dcc9 | 865 | port = uli->ports.sport; |
1da177e4 LT |
866 | break; |
867 | case IPPROTO_ICMP: | |
868 | case IPPROTO_ICMPV6: | |
6281dcc9 | 869 | port = htons(uli->icmpt.type); |
1da177e4 | 870 | break; |
2ce4272a | 871 | case IPPROTO_MH: |
6281dcc9 | 872 | port = htons(uli->mht.type); |
2ce4272a | 873 | break; |
cc9ff19d | 874 | case IPPROTO_GRE: |
6281dcc9 | 875 | port = htons(ntohl(uli->gre_key) >> 16); |
cc9ff19d | 876 | break; |
1da177e4 LT |
877 | default: |
878 | port = 0; /*XXX*/ | |
879 | } | |
880 | return port; | |
881 | } | |
882 | ||
883 | static __inline__ | |
6281dcc9 | 884 | __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 885 | { |
f9d07e41 | 886 | __be16 port; |
1d28f42c | 887 | switch(fl->flowi_proto) { |
1da177e4 LT |
888 | case IPPROTO_TCP: |
889 | case IPPROTO_UDP: | |
ba4e58ec | 890 | case IPPROTO_UDPLITE: |
1da177e4 | 891 | case IPPROTO_SCTP: |
6281dcc9 | 892 | port = uli->ports.dport; |
1da177e4 LT |
893 | break; |
894 | case IPPROTO_ICMP: | |
895 | case IPPROTO_ICMPV6: | |
6281dcc9 | 896 | port = htons(uli->icmpt.code); |
1da177e4 | 897 | break; |
cc9ff19d | 898 | case IPPROTO_GRE: |
6281dcc9 | 899 | port = htons(ntohl(uli->gre_key) & 0xffff); |
cc9ff19d | 900 | break; |
1da177e4 LT |
901 | default: |
902 | port = 0; /*XXX*/ | |
903 | } | |
904 | return port; | |
905 | } | |
906 | ||
d511337a JP |
907 | bool xfrm_selector_match(const struct xfrm_selector *sel, |
908 | const struct flowi *fl, unsigned short family); | |
1da177e4 | 909 | |
df71837d TJ |
910 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
911 | /* If neither has a context --> match | |
912 | * Otherwise, both must have a context and the sids, doi, alg must match | |
913 | */ | |
bc9b35ad | 914 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d TJ |
915 | { |
916 | return ((!s1 && !s2) || | |
917 | (s1 && s2 && | |
918 | (s1->ctx_sid == s2->ctx_sid) && | |
919 | (s1->ctx_doi == s2->ctx_doi) && | |
920 | (s1->ctx_alg == s2->ctx_alg))); | |
921 | } | |
922 | #else | |
bc9b35ad | 923 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d | 924 | { |
bc9b35ad | 925 | return true; |
df71837d TJ |
926 | } |
927 | #endif | |
928 | ||
1da177e4 LT |
929 | /* A struct encoding bundle of transformations to apply to some set of flow. |
930 | * | |
931 | * dst->child points to the next element of bundle. | |
932 | * dst->xfrm points to an instanse of transformer. | |
933 | * | |
934 | * Due to unfortunate limitations of current routing cache, which we | |
935 | * have no time to fix, it mirrors struct rtable and bound to the same | |
936 | * routing key, including saddr,daddr. However, we can have many of | |
937 | * bundles differing by session id. All the bundles grow from a parent | |
938 | * policy rule. | |
939 | */ | |
fd2c3ef7 | 940 | struct xfrm_dst { |
1da177e4 | 941 | union { |
1da177e4 LT |
942 | struct dst_entry dst; |
943 | struct rtable rt; | |
944 | struct rt6_info rt6; | |
945 | } u; | |
946 | struct dst_entry *route; | |
80c802f3 TT |
947 | struct flow_cache_object flo; |
948 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; | |
949 | int num_pols, num_xfrms; | |
157bfc25 MN |
950 | #ifdef CONFIG_XFRM_SUB_POLICY |
951 | struct flowi *origin; | |
952 | struct xfrm_selector *partner; | |
953 | #endif | |
80c802f3 TT |
954 | u32 xfrm_genid; |
955 | u32 policy_genid; | |
1da177e4 LT |
956 | u32 route_mtu_cached; |
957 | u32 child_mtu_cached; | |
92d63dec HY |
958 | u32 route_cookie; |
959 | u32 path_cookie; | |
1da177e4 LT |
960 | }; |
961 | ||
def8b4fa | 962 | #ifdef CONFIG_XFRM |
aabc9761 HX |
963 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
964 | { | |
80c802f3 | 965 | xfrm_pols_put(xdst->pols, xdst->num_pols); |
aabc9761 HX |
966 | dst_release(xdst->route); |
967 | if (likely(xdst->u.dst.xfrm)) | |
968 | xfrm_state_put(xdst->u.dst.xfrm); | |
157bfc25 MN |
969 | #ifdef CONFIG_XFRM_SUB_POLICY |
970 | kfree(xdst->origin); | |
971 | xdst->origin = NULL; | |
972 | kfree(xdst->partner); | |
973 | xdst->partner = NULL; | |
974 | #endif | |
aabc9761 | 975 | } |
def8b4fa | 976 | #endif |
aabc9761 | 977 | |
d511337a | 978 | void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); |
aabc9761 | 979 | |
fd2c3ef7 | 980 | struct sec_path { |
1da177e4 LT |
981 | atomic_t refcnt; |
982 | int len; | |
dbe5b4aa | 983 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
1da177e4 LT |
984 | }; |
985 | ||
990078af MS |
986 | static inline int secpath_exists(struct sk_buff *skb) |
987 | { | |
988 | #ifdef CONFIG_XFRM | |
989 | return skb->sp != NULL; | |
990 | #else | |
991 | return 0; | |
992 | #endif | |
993 | } | |
994 | ||
1da177e4 LT |
995 | static inline struct sec_path * |
996 | secpath_get(struct sec_path *sp) | |
997 | { | |
998 | if (sp) | |
999 | atomic_inc(&sp->refcnt); | |
1000 | return sp; | |
1001 | } | |
1002 | ||
d511337a | 1003 | void __secpath_destroy(struct sec_path *sp); |
1da177e4 LT |
1004 | |
1005 | static inline void | |
1006 | secpath_put(struct sec_path *sp) | |
1007 | { | |
1008 | if (sp && atomic_dec_and_test(&sp->refcnt)) | |
1009 | __secpath_destroy(sp); | |
1010 | } | |
1011 | ||
d511337a | 1012 | struct sec_path *secpath_dup(struct sec_path *src); |
1da177e4 LT |
1013 | |
1014 | static inline void | |
1015 | secpath_reset(struct sk_buff *skb) | |
1016 | { | |
1017 | #ifdef CONFIG_XFRM | |
1018 | secpath_put(skb->sp); | |
1019 | skb->sp = NULL; | |
1020 | #endif | |
1021 | } | |
1022 | ||
a1e59abf | 1023 | static inline int |
6cc32961 | 1024 | xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) |
a1e59abf PM |
1025 | { |
1026 | switch (family) { | |
1027 | case AF_INET: | |
1028 | return addr->a4 == 0; | |
1029 | case AF_INET6: | |
1030 | return ipv6_addr_any((struct in6_addr *)&addr->a6); | |
1031 | } | |
1032 | return 0; | |
1033 | } | |
1034 | ||
1da177e4 | 1035 | static inline int |
21eddb5c | 1036 | __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1037 | { |
1038 | return (tmpl->saddr.a4 && | |
1039 | tmpl->saddr.a4 != x->props.saddr.a4); | |
1040 | } | |
1041 | ||
1042 | static inline int | |
21eddb5c | 1043 | __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1044 | { |
1045 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
ff88b30c | 1046 | !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); |
1da177e4 LT |
1047 | } |
1048 | ||
1049 | static inline int | |
21eddb5c | 1050 | xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) |
1da177e4 LT |
1051 | { |
1052 | switch (family) { | |
1053 | case AF_INET: | |
1054 | return __xfrm4_state_addr_cmp(tmpl, x); | |
1055 | case AF_INET6: | |
1056 | return __xfrm6_state_addr_cmp(tmpl, x); | |
1057 | } | |
1058 | return !0; | |
1059 | } | |
1060 | ||
1061 | #ifdef CONFIG_XFRM | |
d511337a JP |
1062 | int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, |
1063 | unsigned short family); | |
1da177e4 | 1064 | |
d5422efe HX |
1065 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
1066 | struct sk_buff *skb, | |
1067 | unsigned int family, int reverse) | |
1da177e4 | 1068 | { |
f6e1e25d | 1069 | struct net *net = dev_net(skb->dev); |
d5422efe HX |
1070 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
1071 | ||
1da177e4 | 1072 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
d5422efe | 1073 | return __xfrm_policy_check(sk, ndir, skb, family); |
4e81bb83 | 1074 | |
f6e1e25d | 1075 | return (!net->xfrm.policy_count[dir] && !skb->sp) || |
adf30907 | 1076 | (skb_dst(skb)->flags & DST_NOPOLICY) || |
d5422efe HX |
1077 | __xfrm_policy_check(sk, ndir, skb, family); |
1078 | } | |
1079 | ||
1080 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1081 | { | |
1082 | return __xfrm_policy_check2(sk, dir, skb, family, 0); | |
1da177e4 LT |
1083 | } |
1084 | ||
1085 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1086 | { | |
1087 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
1088 | } | |
1089 | ||
1090 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1091 | { | |
1092 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
1093 | } | |
1094 | ||
d5422efe HX |
1095 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1096 | struct sk_buff *skb) | |
1097 | { | |
1098 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); | |
1099 | } | |
1100 | ||
1101 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1102 | struct sk_buff *skb) | |
1103 | { | |
1104 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); | |
1105 | } | |
1106 | ||
d511337a JP |
1107 | int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, |
1108 | unsigned int family, int reverse); | |
d5422efe HX |
1109 | |
1110 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1111 | unsigned int family) | |
1112 | { | |
1113 | return __xfrm_decode_session(skb, fl, family, 0); | |
1114 | } | |
1115 | ||
1116 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, | |
1117 | struct flowi *fl, | |
1118 | unsigned int family) | |
1119 | { | |
1120 | return __xfrm_decode_session(skb, fl, family, 1); | |
1121 | } | |
1122 | ||
d511337a | 1123 | int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
1da177e4 LT |
1124 | |
1125 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
1126 | { | |
99a66657 AD |
1127 | struct net *net = dev_net(skb->dev); |
1128 | ||
1129 | return !net->xfrm.policy_count[XFRM_POLICY_OUT] || | |
adf30907 | 1130 | (skb_dst(skb)->flags & DST_NOXFRM) || |
1da177e4 LT |
1131 | __xfrm_route_forward(skb, family); |
1132 | } | |
1133 | ||
1134 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
1135 | { | |
1136 | return xfrm_route_forward(skb, AF_INET); | |
1137 | } | |
1138 | ||
1139 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
1140 | { | |
1141 | return xfrm_route_forward(skb, AF_INET6); | |
1142 | } | |
1143 | ||
d511337a | 1144 | int __xfrm_sk_clone_policy(struct sock *sk); |
1da177e4 LT |
1145 | |
1146 | static inline int xfrm_sk_clone_policy(struct sock *sk) | |
1147 | { | |
1148 | if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) | |
1149 | return __xfrm_sk_clone_policy(sk); | |
1150 | return 0; | |
1151 | } | |
1152 | ||
d511337a | 1153 | int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
1154 | |
1155 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
1156 | { | |
1157 | if (unlikely(sk->sk_policy[0] != NULL)) { | |
1158 | xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); | |
1159 | sk->sk_policy[0] = NULL; | |
1160 | } | |
1161 | if (unlikely(sk->sk_policy[1] != NULL)) { | |
1162 | xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); | |
1163 | sk->sk_policy[1] = NULL; | |
1164 | } | |
1165 | } | |
1166 | ||
d511337a | 1167 | void xfrm_garbage_collect(struct net *net); |
e4c17216 | 1168 | |
1da177e4 LT |
1169 | #else |
1170 | ||
1171 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
1172 | static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } | |
1173 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } | |
1174 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
1175 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1176 | { | |
1177 | return 1; | |
1178 | } | |
1179 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1180 | { | |
1181 | return 1; | |
1182 | } | |
1183 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1184 | { | |
1185 | return 1; | |
1186 | } | |
d5422efe HX |
1187 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
1188 | struct flowi *fl, | |
1189 | unsigned int family) | |
1190 | { | |
1191 | return -ENOSYS; | |
1192 | } | |
1193 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, | |
1194 | struct sk_buff *skb) | |
1195 | { | |
1196 | return 1; | |
1197 | } | |
1198 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1199 | struct sk_buff *skb) | |
1200 | { | |
1201 | return 1; | |
1202 | } | |
e4c17216 PM |
1203 | static inline void xfrm_garbage_collect(struct net *net) |
1204 | { | |
1205 | } | |
1da177e4 LT |
1206 | #endif |
1207 | ||
1208 | static __inline__ | |
e8a4e377 | 1209 | xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1210 | { |
1211 | switch (family){ | |
1212 | case AF_INET: | |
7e1dc7b6 | 1213 | return (xfrm_address_t *)&fl->u.ip4.daddr; |
1da177e4 | 1214 | case AF_INET6: |
7e1dc7b6 | 1215 | return (xfrm_address_t *)&fl->u.ip6.daddr; |
1da177e4 LT |
1216 | } |
1217 | return NULL; | |
1218 | } | |
1219 | ||
1220 | static __inline__ | |
e8a4e377 | 1221 | xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1222 | { |
1223 | switch (family){ | |
1224 | case AF_INET: | |
7e1dc7b6 | 1225 | return (xfrm_address_t *)&fl->u.ip4.saddr; |
1da177e4 | 1226 | case AF_INET6: |
7e1dc7b6 | 1227 | return (xfrm_address_t *)&fl->u.ip6.saddr; |
1da177e4 LT |
1228 | } |
1229 | return NULL; | |
1230 | } | |
1231 | ||
9bb182a7 | 1232 | static __inline__ |
e8a4e377 | 1233 | void xfrm_flowi_addr_get(const struct flowi *fl, |
9bb182a7 YH |
1234 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
1235 | unsigned short family) | |
1236 | { | |
1237 | switch(family) { | |
1238 | case AF_INET: | |
7e1dc7b6 DM |
1239 | memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); |
1240 | memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); | |
9bb182a7 YH |
1241 | break; |
1242 | case AF_INET6: | |
4e3fd7a0 AD |
1243 | *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr; |
1244 | *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr; | |
9bb182a7 YH |
1245 | break; |
1246 | } | |
1247 | } | |
1248 | ||
1da177e4 | 1249 | static __inline__ int |
f8848067 DM |
1250 | __xfrm4_state_addr_check(const struct xfrm_state *x, |
1251 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 LT |
1252 | { |
1253 | if (daddr->a4 == x->id.daddr.a4 && | |
1254 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
1255 | return 1; | |
1256 | return 0; | |
1257 | } | |
1258 | ||
1259 | static __inline__ int | |
f8848067 DM |
1260 | __xfrm6_state_addr_check(const struct xfrm_state *x, |
1261 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 | 1262 | { |
ff88b30c YH |
1263 | if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && |
1264 | (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || | |
1da177e4 LT |
1265 | ipv6_addr_any((struct in6_addr *)saddr) || |
1266 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) | |
1267 | return 1; | |
1268 | return 0; | |
1269 | } | |
1270 | ||
1271 | static __inline__ int | |
f8848067 DM |
1272 | xfrm_state_addr_check(const struct xfrm_state *x, |
1273 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, | |
1da177e4 LT |
1274 | unsigned short family) |
1275 | { | |
1276 | switch (family) { | |
1277 | case AF_INET: | |
1278 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
1279 | case AF_INET6: | |
1280 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
1281 | } | |
1282 | return 0; | |
1283 | } | |
1284 | ||
e53820de | 1285 | static __inline__ int |
f8848067 | 1286 | xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, |
e53820de MN |
1287 | unsigned short family) |
1288 | { | |
1289 | switch (family) { | |
1290 | case AF_INET: | |
1291 | return __xfrm4_state_addr_check(x, | |
7e1dc7b6 DM |
1292 | (const xfrm_address_t *)&fl->u.ip4.daddr, |
1293 | (const xfrm_address_t *)&fl->u.ip4.saddr); | |
e53820de MN |
1294 | case AF_INET6: |
1295 | return __xfrm6_state_addr_check(x, | |
7e1dc7b6 DM |
1296 | (const xfrm_address_t *)&fl->u.ip6.daddr, |
1297 | (const xfrm_address_t *)&fl->u.ip6.saddr); | |
e53820de MN |
1298 | } |
1299 | return 0; | |
1300 | } | |
1301 | ||
f8848067 | 1302 | static inline int xfrm_state_kern(const struct xfrm_state *x) |
1da177e4 LT |
1303 | { |
1304 | return atomic_read(&x->tunnel_users); | |
1305 | } | |
1306 | ||
5794708f MN |
1307 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1308 | { | |
dc00a525 MN |
1309 | return (!userproto || proto == userproto || |
1310 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
1311 | proto == IPPROTO_ESP || | |
1312 | proto == IPPROTO_COMP))); | |
5794708f MN |
1313 | } |
1314 | ||
1da177e4 LT |
1315 | /* |
1316 | * xfrm algorithm information | |
1317 | */ | |
1a6509d9 HX |
1318 | struct xfrm_algo_aead_info { |
1319 | u16 icv_truncbits; | |
1320 | }; | |
1321 | ||
1da177e4 LT |
1322 | struct xfrm_algo_auth_info { |
1323 | u16 icv_truncbits; | |
1324 | u16 icv_fullbits; | |
1325 | }; | |
1326 | ||
1327 | struct xfrm_algo_encr_info { | |
1328 | u16 blockbits; | |
1329 | u16 defkeybits; | |
1330 | }; | |
1331 | ||
1332 | struct xfrm_algo_comp_info { | |
1333 | u16 threshold; | |
1334 | }; | |
1335 | ||
1336 | struct xfrm_algo_desc { | |
1337 | char *name; | |
04ff1260 | 1338 | char *compat; |
1da177e4 | 1339 | u8 available:1; |
7e50f84c | 1340 | u8 pfkey_supported:1; |
1da177e4 | 1341 | union { |
1a6509d9 | 1342 | struct xfrm_algo_aead_info aead; |
1da177e4 LT |
1343 | struct xfrm_algo_auth_info auth; |
1344 | struct xfrm_algo_encr_info encr; | |
1345 | struct xfrm_algo_comp_info comp; | |
1346 | } uinfo; | |
1347 | struct sadb_alg desc; | |
1348 | }; | |
1349 | ||
1350 | /* XFRM tunnel handlers. */ | |
1351 | struct xfrm_tunnel { | |
1352 | int (*handler)(struct sk_buff *skb); | |
a6337463 | 1353 | int (*err_handler)(struct sk_buff *skb, u32 info); |
d2acc347 | 1354 | |
b33eab08 | 1355 | struct xfrm_tunnel __rcu *next; |
d2acc347 | 1356 | int priority; |
1da177e4 LT |
1357 | }; |
1358 | ||
aba82695 FD |
1359 | struct xfrm_tunnel_notifier { |
1360 | int (*handler)(struct sk_buff *skb); | |
1361 | struct xfrm_tunnel_notifier __rcu *next; | |
1362 | int priority; | |
1363 | }; | |
1364 | ||
1da177e4 | 1365 | struct xfrm6_tunnel { |
d2acc347 HX |
1366 | int (*handler)(struct sk_buff *skb); |
1367 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
d5fdd6ba | 1368 | u8 type, u8 code, int offset, __be32 info); |
6f0bcf15 | 1369 | struct xfrm6_tunnel __rcu *next; |
d2acc347 | 1370 | int priority; |
1da177e4 LT |
1371 | }; |
1372 | ||
d511337a JP |
1373 | void xfrm_init(void); |
1374 | void xfrm4_init(void); | |
1375 | int xfrm_state_init(struct net *net); | |
1376 | void xfrm_state_fini(struct net *net); | |
1377 | void xfrm4_state_init(void); | |
c35b7e72 | 1378 | #ifdef CONFIG_XFRM |
d511337a JP |
1379 | int xfrm6_init(void); |
1380 | void xfrm6_fini(void); | |
1381 | int xfrm6_state_init(void); | |
1382 | void xfrm6_state_fini(void); | |
c35b7e72 DL |
1383 | #else |
1384 | static inline int xfrm6_init(void) | |
1385 | { | |
1386 | return 0; | |
1387 | } | |
1388 | static inline void xfrm6_fini(void) | |
1389 | { | |
1390 | ; | |
1391 | } | |
1392 | #endif | |
1da177e4 | 1393 | |
558f82ef | 1394 | #ifdef CONFIG_XFRM_STATISTICS |
d511337a JP |
1395 | int xfrm_proc_init(struct net *net); |
1396 | void xfrm_proc_fini(struct net *net); | |
558f82ef MN |
1397 | #endif |
1398 | ||
d511337a | 1399 | int xfrm_sysctl_init(struct net *net); |
b27aeadb | 1400 | #ifdef CONFIG_SYSCTL |
d511337a | 1401 | void xfrm_sysctl_fini(struct net *net); |
b27aeadb AD |
1402 | #else |
1403 | static inline void xfrm_sysctl_fini(struct net *net) | |
1404 | { | |
1405 | } | |
1406 | #endif | |
1407 | ||
d511337a JP |
1408 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); |
1409 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, | |
1410 | int (*func)(struct xfrm_state *, int, void*), void *); | |
283bc9f3 | 1411 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); |
d511337a JP |
1412 | struct xfrm_state *xfrm_state_alloc(struct net *net); |
1413 | struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, | |
1414 | const xfrm_address_t *saddr, | |
1415 | const struct flowi *fl, | |
1416 | struct xfrm_tmpl *tmpl, | |
1417 | struct xfrm_policy *pol, int *err, | |
1418 | unsigned short family); | |
1419 | struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, | |
1420 | xfrm_address_t *daddr, | |
1421 | xfrm_address_t *saddr, | |
1422 | unsigned short family, | |
1423 | u8 mode, u8 proto, u32 reqid); | |
c454997e FD |
1424 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
1425 | unsigned short family); | |
d511337a JP |
1426 | int xfrm_state_check_expire(struct xfrm_state *x); |
1427 | void xfrm_state_insert(struct xfrm_state *x); | |
1428 | int xfrm_state_add(struct xfrm_state *x); | |
1429 | int xfrm_state_update(struct xfrm_state *x); | |
1430 | struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, | |
1431 | const xfrm_address_t *daddr, __be32 spi, | |
1432 | u8 proto, unsigned short family); | |
1433 | struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, | |
1434 | const xfrm_address_t *daddr, | |
1435 | const xfrm_address_t *saddr, | |
1436 | u8 proto, | |
1437 | unsigned short family); | |
41a49cc3 | 1438 | #ifdef CONFIG_XFRM_SUB_POLICY |
d511337a | 1439 | int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, |
283bc9f3 | 1440 | unsigned short family, struct net *net); |
d511337a JP |
1441 | int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, |
1442 | unsigned short family); | |
41a49cc3 MN |
1443 | #else |
1444 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
283bc9f3 | 1445 | int n, unsigned short family, struct net *net) |
41a49cc3 MN |
1446 | { |
1447 | return -ENOSYS; | |
1448 | } | |
1449 | ||
1450 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1451 | int n, unsigned short family) | |
1452 | { | |
1453 | return -ENOSYS; | |
1454 | } | |
1455 | #endif | |
af11e316 JHS |
1456 | |
1457 | struct xfrmk_sadinfo { | |
1458 | u32 sadhcnt; /* current hash bkts */ | |
1459 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1460 | u32 sadcnt; /* current running count */ | |
1461 | }; | |
1462 | ||
5a6d3416 JHS |
1463 | struct xfrmk_spdinfo { |
1464 | u32 incnt; | |
1465 | u32 outcnt; | |
1466 | u32 fwdcnt; | |
1467 | u32 inscnt; | |
1468 | u32 outscnt; | |
1469 | u32 fwdscnt; | |
1470 | u32 spdhcnt; | |
1471 | u32 spdhmcnt; | |
1472 | }; | |
1473 | ||
d511337a JP |
1474 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1475 | int xfrm_state_delete(struct xfrm_state *x); | |
1476 | int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); | |
1477 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); | |
1478 | void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); | |
1479 | u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); | |
1480 | int xfrm_init_replay(struct xfrm_state *x); | |
1481 | int xfrm_state_mtu(struct xfrm_state *x, int mtu); | |
1482 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay); | |
1483 | int xfrm_init_state(struct xfrm_state *x); | |
1484 | int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); | |
1485 | int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); | |
1486 | int xfrm_input_resume(struct sk_buff *skb, int nexthdr); | |
1487 | int xfrm_output_resume(struct sk_buff *skb, int err); | |
1488 | int xfrm_output(struct sk_buff *skb); | |
1489 | int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); | |
1490 | void xfrm_local_error(struct sk_buff *skb, int mtu); | |
1491 | int xfrm4_extract_header(struct sk_buff *skb); | |
1492 | int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); | |
1493 | int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1494 | int encap_type); | |
1495 | int xfrm4_transport_finish(struct sk_buff *skb, int async); | |
1496 | int xfrm4_rcv(struct sk_buff *skb); | |
c4541b41 HX |
1497 | |
1498 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1499 | { | |
1500 | return xfrm4_rcv_encap(skb, nexthdr, spi, 0); | |
1501 | } | |
1502 | ||
d511337a JP |
1503 | int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1504 | int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1505 | int xfrm4_output(struct sk_buff *skb); | |
1506 | int xfrm4_output_finish(struct sk_buff *skb); | |
1507 | int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); | |
1508 | int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
d511337a | 1509 | void xfrm4_local_error(struct sk_buff *skb, u32 mtu); |
7b77d161 DM |
1510 | int xfrm4_mode_tunnel_input_register(struct xfrm_tunnel_notifier *handler); |
1511 | int xfrm4_mode_tunnel_input_deregister(struct xfrm_tunnel_notifier *handler); | |
212e5601 SK |
1512 | int xfrm6_mode_tunnel_input_register(struct xfrm_tunnel_notifier *handler); |
1513 | int xfrm6_mode_tunnel_input_deregister(struct xfrm_tunnel_notifier *handler); | |
d511337a JP |
1514 | int xfrm6_extract_header(struct sk_buff *skb); |
1515 | int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); | |
1516 | int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); | |
1517 | int xfrm6_transport_finish(struct sk_buff *skb, int async); | |
1518 | int xfrm6_rcv(struct sk_buff *skb); | |
1519 | int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, | |
1520 | xfrm_address_t *saddr, u8 proto); | |
7b77d161 | 1521 | void xfrm6_local_error(struct sk_buff *skb, u32 mtu); |
d511337a | 1522 | int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
7b77d161 | 1523 | int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); |
d511337a JP |
1524 | __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
1525 | __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); | |
1526 | int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); | |
1527 | int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1528 | int xfrm6_output(struct sk_buff *skb); | |
1529 | int xfrm6_output_finish(struct sk_buff *skb); | |
1530 | int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, | |
1531 | u8 **prevhdr); | |
1da177e4 LT |
1532 | |
1533 | #ifdef CONFIG_XFRM | |
d511337a JP |
1534 | int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1535 | int xfrm_user_policy(struct sock *sk, int optname, | |
1536 | u8 __user *optval, int optlen); | |
1da177e4 LT |
1537 | #else |
1538 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1539 | { | |
1540 | return -ENOPROTOOPT; | |
1541 | } | |
1542 | ||
067b207b | 1543 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
1544 | { |
1545 | /* should not happen */ | |
1546 | kfree_skb(skb); | |
1547 | return 0; | |
1548 | } | |
1da177e4 LT |
1549 | #endif |
1550 | ||
0331b1f3 | 1551 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
4c563f76 | 1552 | |
d511337a JP |
1553 | void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
1554 | int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, | |
1555 | int (*func)(struct xfrm_policy *, int, int, void*), | |
1556 | void *); | |
283bc9f3 | 1557 | void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); |
1da177e4 | 1558 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
8ca2e93b JHS |
1559 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, |
1560 | u8 type, int dir, | |
4e81bb83 | 1561 | struct xfrm_selector *sel, |
ef41aaa0 EP |
1562 | struct xfrm_sec_ctx *ctx, int delete, |
1563 | int *err); | |
d511337a JP |
1564 | struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, |
1565 | u32 id, int delete, int *err); | |
33ffbbd5 | 1566 | int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); |
1da177e4 | 1567 | u32 xfrm_get_acqseq(void); |
776e9dd9 | 1568 | int verify_spi_info(u8 proto, u32 min, u32 max); |
d511337a | 1569 | int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
e473fcb4 | 1570 | struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, |
bd55775c | 1571 | u8 mode, u32 reqid, u8 proto, |
a70486f0 DM |
1572 | const xfrm_address_t *daddr, |
1573 | const xfrm_address_t *saddr, int create, | |
bd55775c | 1574 | unsigned short family); |
d511337a | 1575 | int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
1da177e4 | 1576 | |
80c9abaa | 1577 | #ifdef CONFIG_XFRM_MIGRATE |
d511337a JP |
1578 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1579 | const struct xfrm_migrate *m, int num_bundles, | |
1580 | const struct xfrm_kmaddress *k); | |
283bc9f3 | 1581 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net); |
d511337a JP |
1582 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
1583 | struct xfrm_migrate *m); | |
1584 | int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, | |
1585 | struct xfrm_migrate *m, int num_bundles, | |
8d549c4f | 1586 | struct xfrm_kmaddress *k, struct net *net); |
80c9abaa SS |
1587 | #endif |
1588 | ||
d511337a JP |
1589 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
1590 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); | |
1591 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, | |
1592 | xfrm_address_t *addr); | |
1593 | ||
1594 | void xfrm_input_init(void); | |
1595 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); | |
1596 | ||
1597 | void xfrm_probe_algs(void); | |
1598 | int xfrm_count_pfkey_auth_supported(void); | |
1599 | int xfrm_count_pfkey_enc_supported(void); | |
1600 | struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1601 | struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1602 | struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1603 | struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1604 | struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1605 | struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); | |
1606 | struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); | |
1607 | struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); | |
1608 | struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, | |
1609 | int probe); | |
1da177e4 | 1610 | |
70e94e66 YH |
1611 | static inline bool xfrm6_addr_equal(const xfrm_address_t *a, |
1612 | const xfrm_address_t *b) | |
1613 | { | |
1614 | return ipv6_addr_equal((const struct in6_addr *)a, | |
1615 | (const struct in6_addr *)b); | |
1616 | } | |
1617 | ||
1618 | static inline bool xfrm_addr_equal(const xfrm_address_t *a, | |
1619 | const xfrm_address_t *b, | |
1620 | sa_family_t family) | |
1da177e4 LT |
1621 | { |
1622 | switch (family) { | |
1623 | default: | |
1624 | case AF_INET: | |
70e94e66 | 1625 | return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; |
1da177e4 | 1626 | case AF_INET6: |
70e94e66 | 1627 | return xfrm6_addr_equal(a, b); |
1da177e4 LT |
1628 | } |
1629 | } | |
1630 | ||
77d8d7a6 HX |
1631 | static inline int xfrm_policy_id2dir(u32 index) |
1632 | { | |
1633 | return index & 7; | |
1634 | } | |
1635 | ||
a6483b79 AD |
1636 | #ifdef CONFIG_XFRM |
1637 | static inline int xfrm_aevent_is_on(struct net *net) | |
f8cd5488 | 1638 | { |
be33690d PM |
1639 | struct sock *nlsk; |
1640 | int ret = 0; | |
1641 | ||
1642 | rcu_read_lock(); | |
a6483b79 | 1643 | nlsk = rcu_dereference(net->xfrm.nlsk); |
be33690d PM |
1644 | if (nlsk) |
1645 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1646 | rcu_read_unlock(); | |
1647 | return ret; | |
f8cd5488 | 1648 | } |
a6483b79 | 1649 | #endif |
f8cd5488 | 1650 | |
85158621 | 1651 | static inline int xfrm_alg_len(const struct xfrm_algo *alg) |
0f99be0d ED |
1652 | { |
1653 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1654 | } | |
1655 | ||
85158621 | 1656 | static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) |
4447bb33 MW |
1657 | { |
1658 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1659 | } | |
1660 | ||
9736acf3 SK |
1661 | static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) |
1662 | { | |
1663 | return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); | |
1664 | } | |
1665 | ||
80c9abaa | 1666 | #ifdef CONFIG_XFRM_MIGRATE |
af2f464e SK |
1667 | static inline int xfrm_replay_clone(struct xfrm_state *x, |
1668 | struct xfrm_state *orig) | |
1669 | { | |
1670 | x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), | |
1671 | GFP_KERNEL); | |
1672 | if (!x->replay_esn) | |
1673 | return -ENOMEM; | |
1674 | ||
1675 | x->replay_esn->bmp_len = orig->replay_esn->bmp_len; | |
1676 | x->replay_esn->replay_window = orig->replay_esn->replay_window; | |
1677 | ||
1678 | x->preplay_esn = kmemdup(x->replay_esn, | |
1679 | xfrm_replay_state_esn_len(x->replay_esn), | |
1680 | GFP_KERNEL); | |
1681 | if (!x->preplay_esn) { | |
1682 | kfree(x->replay_esn); | |
1683 | return -ENOMEM; | |
1684 | } | |
1685 | ||
1686 | return 0; | |
1687 | } | |
1688 | ||
80c9abaa SS |
1689 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
1690 | { | |
0f99be0d | 1691 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
80c9abaa SS |
1692 | } |
1693 | ||
4447bb33 MW |
1694 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
1695 | { | |
1696 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); | |
1697 | } | |
1698 | ||
80c9abaa SS |
1699 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
1700 | { | |
1701 | int i; | |
1702 | for (i = 0; i < n; i++) | |
1703 | xfrm_state_put(*(states + i)); | |
1704 | } | |
1705 | ||
1706 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1707 | { | |
1708 | int i; | |
1709 | for (i = 0; i < n; i++) | |
1710 | xfrm_state_delete(*(states + i)); | |
1711 | } | |
1712 | #endif | |
f8cd5488 | 1713 | |
def8b4fa | 1714 | #ifdef CONFIG_XFRM |
00501121 HX |
1715 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
1716 | { | |
1717 | return skb->sp->xvec[skb->sp->len - 1]; | |
1718 | } | |
def8b4fa | 1719 | #endif |
00501121 | 1720 | |
bf825f81 JHS |
1721 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
1722 | { | |
1723 | if (attrs[XFRMA_MARK]) | |
4efd7e83 | 1724 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
bf825f81 JHS |
1725 | else |
1726 | m->v = m->m = 0; | |
1727 | ||
1728 | return m->v & m->m; | |
1729 | } | |
1730 | ||
e3dfa389 | 1731 | static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) |
bf825f81 | 1732 | { |
1d1e34dd | 1733 | int ret = 0; |
bf825f81 | 1734 | |
1d1e34dd DM |
1735 | if (m->m | m->v) |
1736 | ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); | |
1737 | return ret; | |
bf825f81 JHS |
1738 | } |
1739 | ||
1da177e4 | 1740 | #endif /* _NET_XFRM_H */ |