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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 | ||
4a3e2f71 | 56 | extern struct mutex xfrm_cfg_mutex; |
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; | |
122 | union { | |
123 | u8 dying; | |
124 | u8 proto; | |
125 | }; | |
126 | u32 seq; | |
127 | }; | |
128 | ||
1da177e4 | 129 | /* Full description of state of transformer. */ |
fd2c3ef7 | 130 | struct xfrm_state { |
673c09be AD |
131 | #ifdef CONFIG_NET_NS |
132 | struct net *xs_net; | |
133 | #endif | |
abb81c4f | 134 | union { |
12a169e7 | 135 | struct hlist_node gclist; |
abb81c4f HX |
136 | struct hlist_node bydst; |
137 | }; | |
8f126e37 DM |
138 | struct hlist_node bysrc; |
139 | struct hlist_node byspi; | |
1da177e4 LT |
140 | |
141 | atomic_t refcnt; | |
142 | spinlock_t lock; | |
143 | ||
144 | struct xfrm_id id; | |
145 | struct xfrm_selector sel; | |
bf825f81 | 146 | struct xfrm_mark mark; |
35d2856b | 147 | u32 tfcpad; |
1da177e4 | 148 | |
9d4a706d DM |
149 | u32 genid; |
150 | ||
12a169e7 HX |
151 | /* Key manager bits */ |
152 | struct xfrm_state_walk km; | |
1da177e4 LT |
153 | |
154 | /* Parameters of this state. */ | |
155 | struct { | |
156 | u32 reqid; | |
157 | u8 mode; | |
158 | u8 replay_window; | |
159 | u8 aalgo, ealgo, calgo; | |
160 | u8 flags; | |
161 | u16 family; | |
162 | xfrm_address_t saddr; | |
163 | int header_len; | |
164 | int trailer_len; | |
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 | ||
309 | extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); | |
310 | extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); | |
214e005b DM |
311 | extern void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c); |
312 | extern void km_state_notify(struct xfrm_state *x, const struct km_event *c); | |
1da177e4 LT |
313 | |
314 | struct xfrm_tmpl; | |
980ebd25 | 315 | extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
15e47304 | 316 | extern void km_state_expired(struct xfrm_state *x, int hard, u32 portid); |
53bc6b4d JHS |
317 | extern int __xfrm_state_delete(struct xfrm_state *x); |
318 | ||
1da177e4 | 319 | struct xfrm_state_afinfo { |
17c2a42a | 320 | unsigned int family; |
36cf9acf | 321 | unsigned int proto; |
8e3d716c | 322 | __be16 eth_proto; |
17c2a42a | 323 | struct module *owner; |
533cb5b0 | 324 | const struct xfrm_type *type_map[IPPROTO_MAX]; |
aa5d62cc | 325 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; |
d094cd83 | 326 | int (*init_flags)(struct xfrm_state *x); |
73e5ebb2 DM |
327 | void (*init_tempsel)(struct xfrm_selector *sel, |
328 | const struct flowi *fl); | |
19bd6244 DM |
329 | void (*init_temprop)(struct xfrm_state *x, |
330 | const struct xfrm_tmpl *tmpl, | |
331 | const xfrm_address_t *daddr, | |
332 | const xfrm_address_t *saddr); | |
41a49cc3 MN |
333 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
334 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); | |
cdca7265 | 335 | int (*output)(struct sk_buff *skb); |
43a4dea4 | 336 | int (*output_finish)(struct sk_buff *skb); |
227620e2 HX |
337 | int (*extract_input)(struct xfrm_state *x, |
338 | struct sk_buff *skb); | |
36cf9acf HX |
339 | int (*extract_output)(struct xfrm_state *x, |
340 | struct sk_buff *skb); | |
716062fd HX |
341 | int (*transport_finish)(struct sk_buff *skb, |
342 | int async); | |
1da177e4 LT |
343 | }; |
344 | ||
345 | extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); | |
346 | extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
347 | ||
348 | extern void xfrm_state_delete_tunnel(struct xfrm_state *x); | |
349 | ||
fd2c3ef7 | 350 | struct xfrm_type { |
1da177e4 LT |
351 | char *description; |
352 | struct module *owner; | |
a6337463 | 353 | u8 proto; |
354 | u8 flags; | |
1b5c2299 | 355 | #define XFRM_TYPE_NON_FRAGMENT 1 |
436a0a40 | 356 | #define XFRM_TYPE_REPLAY_PROT 2 |
f04e7e8d HX |
357 | #define XFRM_TYPE_LOCAL_COADDR 4 |
358 | #define XFRM_TYPE_REMOTE_COADDR 8 | |
1da177e4 | 359 | |
72cb6962 | 360 | int (*init_state)(struct xfrm_state *x); |
1da177e4 | 361 | void (*destructor)(struct xfrm_state *); |
e695633e | 362 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 363 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
8f029de2 DM |
364 | int (*reject)(struct xfrm_state *, struct sk_buff *, |
365 | const struct flowi *); | |
aee5adb4 | 366 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
1da177e4 | 367 | /* Estimate maximal size of result of transformation of a dgram */ |
c5c25238 | 368 | u32 (*get_mtu)(struct xfrm_state *, int size); |
1da177e4 LT |
369 | }; |
370 | ||
533cb5b0 ED |
371 | extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
372 | extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); | |
1da177e4 | 373 | |
b59f45d0 | 374 | struct xfrm_mode { |
227620e2 HX |
375 | /* |
376 | * Remove encapsulation header. | |
377 | * | |
378 | * The IP header will be moved over the top of the encapsulation | |
379 | * header. | |
380 | * | |
381 | * On entry, the transport header shall point to where the IP header | |
382 | * should be and the network header shall be set to where the IP | |
383 | * header currently is. skb->data shall point to the start of the | |
384 | * payload. | |
385 | */ | |
386 | int (*input2)(struct xfrm_state *x, struct sk_buff *skb); | |
387 | ||
388 | /* | |
389 | * This is the actual input entry point. | |
390 | * | |
391 | * For transport mode and equivalent this would be identical to | |
392 | * input2 (which does not need to be set). While tunnel mode | |
393 | * and equivalent would set this to the tunnel encapsulation function | |
394 | * xfrm4_prepare_input that would in turn call input2. | |
395 | */ | |
b59f45d0 | 396 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); |
37fedd3a HX |
397 | |
398 | /* | |
399 | * Add encapsulation header. | |
400 | * | |
401 | * On exit, the transport header will be set to the start of the | |
402 | * encapsulation header to be filled in by x->type->output and | |
403 | * the mac header will be set to the nextheader (protocol for | |
404 | * IPv4) field of the extension header directly preceding the | |
405 | * encapsulation header, or in its absence, that of the top IP | |
406 | * header. The value of the network header will always point | |
407 | * to the top IP header while skb->data will point to the payload. | |
408 | */ | |
36cf9acf HX |
409 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); |
410 | ||
411 | /* | |
412 | * This is the actual output entry point. | |
413 | * | |
414 | * For transport mode and equivalent this would be identical to | |
415 | * output2 (which does not need to be set). While tunnel mode | |
416 | * and equivalent would set this to a tunnel encapsulation function | |
417 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn | |
418 | * call output2. | |
419 | */ | |
420 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); | |
b59f45d0 | 421 | |
17c2a42a | 422 | struct xfrm_state_afinfo *afinfo; |
b59f45d0 HX |
423 | struct module *owner; |
424 | unsigned int encap; | |
1bfcb10f HX |
425 | int flags; |
426 | }; | |
427 | ||
428 | /* Flags for xfrm_mode. */ | |
429 | enum { | |
430 | XFRM_MODE_FLAG_TUNNEL = 1, | |
b59f45d0 HX |
431 | }; |
432 | ||
433 | extern int xfrm_register_mode(struct xfrm_mode *mode, int family); | |
434 | extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); | |
b59f45d0 | 435 | |
df9dcb45 KM |
436 | static inline int xfrm_af2proto(unsigned int family) |
437 | { | |
438 | switch(family) { | |
439 | case AF_INET: | |
440 | return IPPROTO_IPIP; | |
441 | case AF_INET6: | |
442 | return IPPROTO_IPV6; | |
443 | default: | |
444 | return 0; | |
445 | } | |
446 | } | |
447 | ||
448 | static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) | |
449 | { | |
450 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || | |
451 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) | |
452 | return x->inner_mode; | |
453 | else | |
454 | return x->inner_mode_iaf; | |
455 | } | |
456 | ||
fd2c3ef7 | 457 | struct xfrm_tmpl { |
1da177e4 LT |
458 | /* id in template is interpreted as: |
459 | * daddr - destination of tunnel, may be zero for transport mode. | |
460 | * spi - zero to acquire spi. Not zero if spi is static, then | |
461 | * daddr must be fixed too. | |
462 | * proto - AH/ESP/IPCOMP | |
463 | */ | |
464 | struct xfrm_id id; | |
465 | ||
466 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
467 | xfrm_address_t saddr; | |
468 | ||
76b3f055 MK |
469 | unsigned short encap_family; |
470 | ||
a6337463 | 471 | u32 reqid; |
1da177e4 | 472 | |
7e49e6de | 473 | /* Mode: transport, tunnel etc. */ |
a6337463 | 474 | u8 mode; |
1da177e4 LT |
475 | |
476 | /* Sharing mode: unique, this session only, this user only etc. */ | |
a6337463 | 477 | u8 share; |
1da177e4 LT |
478 | |
479 | /* May skip this transfomration if no SA is found */ | |
a6337463 | 480 | u8 optional; |
1da177e4 | 481 | |
c5d18e98 | 482 | /* Skip aalgos/ealgos/calgos checks. */ |
a6337463 | 483 | u8 allalgs; |
c5d18e98 | 484 | |
1da177e4 | 485 | /* Bit mask of algos allowed for acquisition */ |
a6337463 | 486 | u32 aalgos; |
487 | u32 ealgos; | |
488 | u32 calgos; | |
1da177e4 LT |
489 | }; |
490 | ||
622dc828 | 491 | #define XFRM_MAX_DEPTH 6 |
1da177e4 | 492 | |
12a169e7 HX |
493 | struct xfrm_policy_walk_entry { |
494 | struct list_head all; | |
495 | u8 dead; | |
496 | }; | |
497 | ||
498 | struct xfrm_policy_walk { | |
499 | struct xfrm_policy_walk_entry walk; | |
500 | u8 type; | |
501 | u32 seq; | |
502 | }; | |
503 | ||
fd2c3ef7 | 504 | struct xfrm_policy { |
0331b1f3 AD |
505 | #ifdef CONFIG_NET_NS |
506 | struct net *xp_net; | |
507 | #endif | |
2518c7c2 DM |
508 | struct hlist_node bydst; |
509 | struct hlist_node byidx; | |
1da177e4 LT |
510 | |
511 | /* This lock only affects elements except for entry. */ | |
512 | rwlock_t lock; | |
513 | atomic_t refcnt; | |
514 | struct timer_list timer; | |
515 | ||
fe1a5f03 | 516 | struct flow_cache_object flo; |
80c802f3 | 517 | atomic_t genid; |
1da177e4 LT |
518 | u32 priority; |
519 | u32 index; | |
bf825f81 | 520 | struct xfrm_mark mark; |
1da177e4 LT |
521 | struct xfrm_selector selector; |
522 | struct xfrm_lifetime_cfg lft; | |
523 | struct xfrm_lifetime_cur curlft; | |
12a169e7 | 524 | struct xfrm_policy_walk_entry walk; |
46ca5f5d ACM |
525 | u8 type; |
526 | u8 action; | |
527 | u8 flags; | |
46ca5f5d | 528 | u8 xfrm_nr; |
12a169e7 | 529 | u16 family; |
df71837d | 530 | struct xfrm_sec_ctx *security; |
1da177e4 LT |
531 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
532 | }; | |
533 | ||
63eb23f5 | 534 | static inline struct net *xp_net(const struct xfrm_policy *xp) |
0331b1f3 AD |
535 | { |
536 | return read_pnet(&xp->xp_net); | |
537 | } | |
538 | ||
13c1d189 AE |
539 | struct xfrm_kmaddress { |
540 | xfrm_address_t local; | |
541 | xfrm_address_t remote; | |
542 | u32 reserved; | |
543 | u16 family; | |
544 | }; | |
545 | ||
80c9abaa SS |
546 | struct xfrm_migrate { |
547 | xfrm_address_t old_daddr; | |
548 | xfrm_address_t old_saddr; | |
549 | xfrm_address_t new_daddr; | |
550 | xfrm_address_t new_saddr; | |
551 | u8 proto; | |
552 | u8 mode; | |
553 | u16 reserved; | |
554 | u32 reqid; | |
555 | u16 old_family; | |
556 | u16 new_family; | |
557 | }; | |
558 | ||
f8cd5488 | 559 | #define XFRM_KM_TIMEOUT 30 |
f8cd5488 JHS |
560 | /* what happened */ |
561 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
562 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
563 | ||
564 | /* default aevent timeout in units of 100ms */ | |
565 | #define XFRM_AE_ETIME 10 | |
566 | /* Async Event timer multiplier */ | |
567 | #define XFRM_AE_ETH_M 10 | |
568 | /* default seq threshold size */ | |
569 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 | 570 | |
fd2c3ef7 | 571 | struct xfrm_mgr { |
1da177e4 LT |
572 | struct list_head list; |
573 | char *id; | |
214e005b | 574 | int (*notify)(struct xfrm_state *x, const struct km_event *c); |
65e0736b | 575 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); |
cb969f07 | 576 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 577 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
214e005b | 578 | int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); |
db983c11 | 579 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
183cad12 DM |
580 | int (*migrate)(const struct xfrm_selector *sel, |
581 | u8 dir, u8 type, | |
582 | const struct xfrm_migrate *m, | |
583 | int num_bundles, | |
584 | const struct xfrm_kmaddress *k); | |
1da177e4 LT |
585 | }; |
586 | ||
587 | extern int xfrm_register_km(struct xfrm_mgr *km); | |
588 | extern int xfrm_unregister_km(struct xfrm_mgr *km); | |
589 | ||
436a0a40 HX |
590 | /* |
591 | * This structure is used for the duration where packets are being | |
592 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
593 | * area beyond the generic IP part may be overwritten. | |
594 | */ | |
595 | struct xfrm_skb_cb { | |
596 | union { | |
597 | struct inet_skb_parm h4; | |
598 | struct inet6_skb_parm h6; | |
599 | } header; | |
600 | ||
601 | /* Sequence number for replay protection. */ | |
b318e0e4 | 602 | union { |
1ce3644a SK |
603 | struct { |
604 | __u32 low; | |
605 | __u32 hi; | |
606 | } output; | |
607 | struct { | |
608 | __be32 low; | |
609 | __be32 hi; | |
610 | } input; | |
b318e0e4 | 611 | } seq; |
436a0a40 HX |
612 | }; |
613 | ||
614 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
615 | ||
36cf9acf HX |
616 | /* |
617 | * This structure is used by the afinfo prepare_input/prepare_output functions | |
618 | * to transmit header information to the mode input/output functions. | |
619 | */ | |
620 | struct xfrm_mode_skb_cb { | |
621 | union { | |
622 | struct inet_skb_parm h4; | |
623 | struct inet6_skb_parm h6; | |
624 | } header; | |
625 | ||
626 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
627 | __be16 id; | |
628 | __be16 frag_off; | |
629 | ||
732c8bd5 HX |
630 | /* IP header length (excluding options or extension headers). */ |
631 | u8 ihl; | |
632 | ||
36cf9acf HX |
633 | /* TOS for IPv4, class for IPv6. */ |
634 | u8 tos; | |
635 | ||
636 | /* TTL for IPv4, hop limitfor IPv6. */ | |
637 | u8 ttl; | |
638 | ||
639 | /* Protocol for IPv4, NH for IPv6. */ | |
640 | u8 protocol; | |
641 | ||
732c8bd5 HX |
642 | /* Option length for IPv4, zero for IPv6. */ |
643 | u8 optlen; | |
644 | ||
36cf9acf HX |
645 | /* Used by IPv6 only, zero for IPv4. */ |
646 | u8 flow_lbl[3]; | |
647 | }; | |
648 | ||
649 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
650 | ||
716062fd HX |
651 | /* |
652 | * This structure is used by the input processing to locate the SPI and | |
653 | * related information. | |
654 | */ | |
655 | struct xfrm_spi_skb_cb { | |
656 | union { | |
657 | struct inet_skb_parm h4; | |
658 | struct inet6_skb_parm h6; | |
659 | } header; | |
660 | ||
716062fd | 661 | unsigned int daddroff; |
2fcb45b6 | 662 | unsigned int family; |
716062fd HX |
663 | }; |
664 | ||
665 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) | |
666 | ||
161a09e7 | 667 | /* Audit Information */ |
fd2c3ef7 | 668 | struct xfrm_audit { |
161a09e7 | 669 | u32 secid; |
e1760bd5 | 670 | kuid_t loginuid; |
2532386f | 671 | u32 sessionid; |
161a09e7 | 672 | }; |
c9204d9c JL |
673 | |
674 | #ifdef CONFIG_AUDITSYSCALL | |
afeb14b4 | 675 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
ab5f5e8b JL |
676 | { |
677 | struct audit_buffer *audit_buf = NULL; | |
ab5f5e8b | 678 | |
afeb14b4 PM |
679 | if (audit_enabled == 0) |
680 | return NULL; | |
ab5f5e8b | 681 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, |
afeb14b4 | 682 | AUDIT_MAC_IPSEC_EVENT); |
ab5f5e8b JL |
683 | if (audit_buf == NULL) |
684 | return NULL; | |
afeb14b4 PM |
685 | audit_log_format(audit_buf, "op=%s", op); |
686 | return audit_buf; | |
687 | } | |
ab5f5e8b | 688 | |
e1760bd5 | 689 | static inline void xfrm_audit_helper_usrinfo(kuid_t auid, u32 ses, u32 secid, |
afeb14b4 PM |
690 | struct audit_buffer *audit_buf) |
691 | { | |
692 | char *secctx; | |
693 | u32 secctx_len; | |
ab5f5e8b | 694 | |
e1760bd5 EB |
695 | audit_log_format(audit_buf, " auid=%u ses=%u", |
696 | from_kuid(&init_user_ns, auid), ses); | |
68277acc PM |
697 | if (secid != 0 && |
698 | security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { | |
ab5f5e8b JL |
699 | audit_log_format(audit_buf, " subj=%s", secctx); |
700 | security_release_secctx(secctx, secctx_len); | |
701 | } else | |
702 | audit_log_task_context(audit_buf); | |
ab5f5e8b JL |
703 | } |
704 | ||
705 | extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
e1760bd5 | 706 | kuid_t auid, u32 ses, u32 secid); |
ab5f5e8b | 707 | extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
e1760bd5 | 708 | kuid_t auid, u32 ses, u32 secid); |
ab5f5e8b | 709 | extern void xfrm_audit_state_add(struct xfrm_state *x, int result, |
e1760bd5 | 710 | kuid_t auid, u32 ses, u32 secid); |
ab5f5e8b | 711 | extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
e1760bd5 | 712 | kuid_t auid, u32 ses, u32 secid); |
afeb14b4 PM |
713 | extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
714 | struct sk_buff *skb); | |
9fdc4883 SK |
715 | extern void xfrm_audit_state_replay(struct xfrm_state *x, |
716 | struct sk_buff *skb, __be32 net_seq); | |
afeb14b4 PM |
717 | extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); |
718 | extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
719 | __be32 net_spi, __be32 net_seq); | |
720 | extern void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
721 | struct sk_buff *skb, u8 proto); | |
c9204d9c | 722 | #else |
41fef0ee MS |
723 | |
724 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
e1760bd5 | 725 | kuid_t auid, u32 ses, u32 secid) |
41fef0ee MS |
726 | { |
727 | } | |
728 | ||
729 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
e1760bd5 | 730 | kuid_t auid, u32 ses, u32 secid) |
41fef0ee MS |
731 | { |
732 | } | |
733 | ||
734 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
e1760bd5 | 735 | kuid_t auid, u32 ses, u32 secid) |
41fef0ee MS |
736 | { |
737 | } | |
738 | ||
739 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
e1760bd5 | 740 | kuid_t auid, u32 ses, u32 secid) |
41fef0ee MS |
741 | { |
742 | } | |
743 | ||
744 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
745 | struct sk_buff *skb) | |
746 | { | |
747 | } | |
748 | ||
9fdc4883 SK |
749 | static inline void xfrm_audit_state_replay(struct xfrm_state *x, |
750 | struct sk_buff *skb, __be32 net_seq) | |
751 | { | |
752 | } | |
753 | ||
41fef0ee MS |
754 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, |
755 | u16 family) | |
756 | { | |
757 | } | |
758 | ||
759 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
760 | __be32 net_spi, __be32 net_seq) | |
761 | { | |
762 | } | |
763 | ||
764 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
765 | struct sk_buff *skb, u8 proto) | |
766 | { | |
767 | } | |
c9204d9c | 768 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 769 | |
1da177e4 LT |
770 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
771 | { | |
772 | if (likely(policy != NULL)) | |
773 | atomic_inc(&policy->refcnt); | |
774 | } | |
775 | ||
64c31b3f | 776 | extern void xfrm_policy_destroy(struct xfrm_policy *policy); |
1da177e4 LT |
777 | |
778 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
779 | { | |
780 | if (atomic_dec_and_test(&policy->refcnt)) | |
64c31b3f | 781 | xfrm_policy_destroy(policy); |
1da177e4 LT |
782 | } |
783 | ||
4e81bb83 MN |
784 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
785 | { | |
786 | int i; | |
787 | for (i = npols - 1; i >= 0; --i) | |
788 | xfrm_pol_put(pols[i]); | |
789 | } | |
4e81bb83 | 790 | |
1da177e4 LT |
791 | extern void __xfrm_state_destroy(struct xfrm_state *); |
792 | ||
21380b81 HX |
793 | static inline void __xfrm_state_put(struct xfrm_state *x) |
794 | { | |
795 | atomic_dec(&x->refcnt); | |
796 | } | |
797 | ||
1da177e4 LT |
798 | static inline void xfrm_state_put(struct xfrm_state *x) |
799 | { | |
800 | if (atomic_dec_and_test(&x->refcnt)) | |
801 | __xfrm_state_destroy(x); | |
802 | } | |
803 | ||
804 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
805 | { | |
806 | atomic_inc(&x->refcnt); | |
807 | } | |
808 | ||
1744a8fe DM |
809 | static inline bool addr_match(const void *token1, const void *token2, |
810 | int prefixlen) | |
1da177e4 | 811 | { |
1744a8fe DM |
812 | const __be32 *a1 = token1; |
813 | const __be32 *a2 = token2; | |
1da177e4 LT |
814 | int pdw; |
815 | int pbi; | |
816 | ||
a6337463 | 817 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
1da177e4 LT |
818 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
819 | ||
820 | if (pdw) | |
821 | if (memcmp(a1, a2, pdw << 2)) | |
1744a8fe | 822 | return false; |
1da177e4 LT |
823 | |
824 | if (pbi) { | |
5f19343f | 825 | __be32 mask; |
1da177e4 LT |
826 | |
827 | mask = htonl((0xffffffff) << (32 - pbi)); | |
828 | ||
829 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
1744a8fe | 830 | return false; |
1da177e4 LT |
831 | } |
832 | ||
1744a8fe | 833 | return true; |
1da177e4 LT |
834 | } |
835 | ||
26bff940 AD |
836 | static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) |
837 | { | |
838 | /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ | |
839 | if (prefixlen == 0) | |
840 | return true; | |
841 | return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen))); | |
842 | } | |
843 | ||
1da177e4 | 844 | static __inline__ |
6281dcc9 | 845 | __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 846 | { |
f9d07e41 | 847 | __be16 port; |
1d28f42c | 848 | switch(fl->flowi_proto) { |
1da177e4 LT |
849 | case IPPROTO_TCP: |
850 | case IPPROTO_UDP: | |
ba4e58ec | 851 | case IPPROTO_UDPLITE: |
1da177e4 | 852 | case IPPROTO_SCTP: |
6281dcc9 | 853 | port = uli->ports.sport; |
1da177e4 LT |
854 | break; |
855 | case IPPROTO_ICMP: | |
856 | case IPPROTO_ICMPV6: | |
6281dcc9 | 857 | port = htons(uli->icmpt.type); |
1da177e4 | 858 | break; |
2ce4272a | 859 | case IPPROTO_MH: |
6281dcc9 | 860 | port = htons(uli->mht.type); |
2ce4272a | 861 | break; |
cc9ff19d | 862 | case IPPROTO_GRE: |
6281dcc9 | 863 | port = htons(ntohl(uli->gre_key) >> 16); |
cc9ff19d | 864 | break; |
1da177e4 LT |
865 | default: |
866 | port = 0; /*XXX*/ | |
867 | } | |
868 | return port; | |
869 | } | |
870 | ||
871 | static __inline__ | |
6281dcc9 | 872 | __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 873 | { |
f9d07e41 | 874 | __be16 port; |
1d28f42c | 875 | switch(fl->flowi_proto) { |
1da177e4 LT |
876 | case IPPROTO_TCP: |
877 | case IPPROTO_UDP: | |
ba4e58ec | 878 | case IPPROTO_UDPLITE: |
1da177e4 | 879 | case IPPROTO_SCTP: |
6281dcc9 | 880 | port = uli->ports.dport; |
1da177e4 LT |
881 | break; |
882 | case IPPROTO_ICMP: | |
883 | case IPPROTO_ICMPV6: | |
6281dcc9 | 884 | port = htons(uli->icmpt.code); |
1da177e4 | 885 | break; |
cc9ff19d | 886 | case IPPROTO_GRE: |
6281dcc9 | 887 | port = htons(ntohl(uli->gre_key) & 0xffff); |
cc9ff19d | 888 | break; |
1da177e4 LT |
889 | default: |
890 | port = 0; /*XXX*/ | |
891 | } | |
892 | return port; | |
893 | } | |
894 | ||
bc9b35ad DM |
895 | extern bool xfrm_selector_match(const struct xfrm_selector *sel, |
896 | const struct flowi *fl, | |
897 | unsigned short family); | |
1da177e4 | 898 | |
df71837d TJ |
899 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
900 | /* If neither has a context --> match | |
901 | * Otherwise, both must have a context and the sids, doi, alg must match | |
902 | */ | |
bc9b35ad | 903 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d TJ |
904 | { |
905 | return ((!s1 && !s2) || | |
906 | (s1 && s2 && | |
907 | (s1->ctx_sid == s2->ctx_sid) && | |
908 | (s1->ctx_doi == s2->ctx_doi) && | |
909 | (s1->ctx_alg == s2->ctx_alg))); | |
910 | } | |
911 | #else | |
bc9b35ad | 912 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d | 913 | { |
bc9b35ad | 914 | return true; |
df71837d TJ |
915 | } |
916 | #endif | |
917 | ||
1da177e4 LT |
918 | /* A struct encoding bundle of transformations to apply to some set of flow. |
919 | * | |
920 | * dst->child points to the next element of bundle. | |
921 | * dst->xfrm points to an instanse of transformer. | |
922 | * | |
923 | * Due to unfortunate limitations of current routing cache, which we | |
924 | * have no time to fix, it mirrors struct rtable and bound to the same | |
925 | * routing key, including saddr,daddr. However, we can have many of | |
926 | * bundles differing by session id. All the bundles grow from a parent | |
927 | * policy rule. | |
928 | */ | |
fd2c3ef7 | 929 | struct xfrm_dst { |
1da177e4 | 930 | union { |
1da177e4 LT |
931 | struct dst_entry dst; |
932 | struct rtable rt; | |
933 | struct rt6_info rt6; | |
934 | } u; | |
935 | struct dst_entry *route; | |
80c802f3 TT |
936 | struct flow_cache_object flo; |
937 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; | |
938 | int num_pols, num_xfrms; | |
157bfc25 MN |
939 | #ifdef CONFIG_XFRM_SUB_POLICY |
940 | struct flowi *origin; | |
941 | struct xfrm_selector *partner; | |
942 | #endif | |
80c802f3 TT |
943 | u32 xfrm_genid; |
944 | u32 policy_genid; | |
1da177e4 LT |
945 | u32 route_mtu_cached; |
946 | u32 child_mtu_cached; | |
92d63dec HY |
947 | u32 route_cookie; |
948 | u32 path_cookie; | |
1da177e4 LT |
949 | }; |
950 | ||
def8b4fa | 951 | #ifdef CONFIG_XFRM |
aabc9761 HX |
952 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
953 | { | |
80c802f3 | 954 | xfrm_pols_put(xdst->pols, xdst->num_pols); |
aabc9761 HX |
955 | dst_release(xdst->route); |
956 | if (likely(xdst->u.dst.xfrm)) | |
957 | xfrm_state_put(xdst->u.dst.xfrm); | |
157bfc25 MN |
958 | #ifdef CONFIG_XFRM_SUB_POLICY |
959 | kfree(xdst->origin); | |
960 | xdst->origin = NULL; | |
961 | kfree(xdst->partner); | |
962 | xdst->partner = NULL; | |
963 | #endif | |
aabc9761 | 964 | } |
def8b4fa | 965 | #endif |
aabc9761 HX |
966 | |
967 | extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); | |
968 | ||
fd2c3ef7 | 969 | struct sec_path { |
1da177e4 LT |
970 | atomic_t refcnt; |
971 | int len; | |
dbe5b4aa | 972 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
1da177e4 LT |
973 | }; |
974 | ||
990078af MS |
975 | static inline int secpath_exists(struct sk_buff *skb) |
976 | { | |
977 | #ifdef CONFIG_XFRM | |
978 | return skb->sp != NULL; | |
979 | #else | |
980 | return 0; | |
981 | #endif | |
982 | } | |
983 | ||
1da177e4 LT |
984 | static inline struct sec_path * |
985 | secpath_get(struct sec_path *sp) | |
986 | { | |
987 | if (sp) | |
988 | atomic_inc(&sp->refcnt); | |
989 | return sp; | |
990 | } | |
991 | ||
992 | extern void __secpath_destroy(struct sec_path *sp); | |
993 | ||
994 | static inline void | |
995 | secpath_put(struct sec_path *sp) | |
996 | { | |
997 | if (sp && atomic_dec_and_test(&sp->refcnt)) | |
998 | __secpath_destroy(sp); | |
999 | } | |
1000 | ||
1001 | extern struct sec_path *secpath_dup(struct sec_path *src); | |
1002 | ||
1003 | static inline void | |
1004 | secpath_reset(struct sk_buff *skb) | |
1005 | { | |
1006 | #ifdef CONFIG_XFRM | |
1007 | secpath_put(skb->sp); | |
1008 | skb->sp = NULL; | |
1009 | #endif | |
1010 | } | |
1011 | ||
a1e59abf | 1012 | static inline int |
6cc32961 | 1013 | xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) |
a1e59abf PM |
1014 | { |
1015 | switch (family) { | |
1016 | case AF_INET: | |
1017 | return addr->a4 == 0; | |
1018 | case AF_INET6: | |
1019 | return ipv6_addr_any((struct in6_addr *)&addr->a6); | |
1020 | } | |
1021 | return 0; | |
1022 | } | |
1023 | ||
1da177e4 | 1024 | static inline int |
21eddb5c | 1025 | __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1026 | { |
1027 | return (tmpl->saddr.a4 && | |
1028 | tmpl->saddr.a4 != x->props.saddr.a4); | |
1029 | } | |
1030 | ||
1031 | static inline int | |
21eddb5c | 1032 | __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1033 | { |
1034 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
ff88b30c | 1035 | !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); |
1da177e4 LT |
1036 | } |
1037 | ||
1038 | static inline int | |
21eddb5c | 1039 | xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) |
1da177e4 LT |
1040 | { |
1041 | switch (family) { | |
1042 | case AF_INET: | |
1043 | return __xfrm4_state_addr_cmp(tmpl, x); | |
1044 | case AF_INET6: | |
1045 | return __xfrm6_state_addr_cmp(tmpl, x); | |
1046 | } | |
1047 | return !0; | |
1048 | } | |
1049 | ||
1050 | #ifdef CONFIG_XFRM | |
1da177e4 LT |
1051 | extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); |
1052 | ||
d5422efe HX |
1053 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
1054 | struct sk_buff *skb, | |
1055 | unsigned int family, int reverse) | |
1da177e4 | 1056 | { |
f6e1e25d | 1057 | struct net *net = dev_net(skb->dev); |
d5422efe HX |
1058 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
1059 | ||
1da177e4 | 1060 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
d5422efe | 1061 | return __xfrm_policy_check(sk, ndir, skb, family); |
4e81bb83 | 1062 | |
f6e1e25d | 1063 | return (!net->xfrm.policy_count[dir] && !skb->sp) || |
adf30907 | 1064 | (skb_dst(skb)->flags & DST_NOPOLICY) || |
d5422efe HX |
1065 | __xfrm_policy_check(sk, ndir, skb, family); |
1066 | } | |
1067 | ||
1068 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1069 | { | |
1070 | return __xfrm_policy_check2(sk, dir, skb, family, 0); | |
1da177e4 LT |
1071 | } |
1072 | ||
1073 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1074 | { | |
1075 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
1076 | } | |
1077 | ||
1078 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1079 | { | |
1080 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
1081 | } | |
1082 | ||
d5422efe HX |
1083 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1084 | struct sk_buff *skb) | |
1085 | { | |
1086 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); | |
1087 | } | |
1088 | ||
1089 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1090 | struct sk_buff *skb) | |
1091 | { | |
1092 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); | |
1093 | } | |
1094 | ||
1095 | extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1096 | unsigned int family, int reverse); | |
1097 | ||
1098 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1099 | unsigned int family) | |
1100 | { | |
1101 | return __xfrm_decode_session(skb, fl, family, 0); | |
1102 | } | |
1103 | ||
1104 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, | |
1105 | struct flowi *fl, | |
1106 | unsigned int family) | |
1107 | { | |
1108 | return __xfrm_decode_session(skb, fl, family, 1); | |
1109 | } | |
1110 | ||
1da177e4 LT |
1111 | extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
1112 | ||
1113 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
1114 | { | |
99a66657 AD |
1115 | struct net *net = dev_net(skb->dev); |
1116 | ||
1117 | return !net->xfrm.policy_count[XFRM_POLICY_OUT] || | |
adf30907 | 1118 | (skb_dst(skb)->flags & DST_NOXFRM) || |
1da177e4 LT |
1119 | __xfrm_route_forward(skb, family); |
1120 | } | |
1121 | ||
1122 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
1123 | { | |
1124 | return xfrm_route_forward(skb, AF_INET); | |
1125 | } | |
1126 | ||
1127 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
1128 | { | |
1129 | return xfrm_route_forward(skb, AF_INET6); | |
1130 | } | |
1131 | ||
1132 | extern int __xfrm_sk_clone_policy(struct sock *sk); | |
1133 | ||
1134 | static inline int xfrm_sk_clone_policy(struct sock *sk) | |
1135 | { | |
1136 | if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) | |
1137 | return __xfrm_sk_clone_policy(sk); | |
1138 | return 0; | |
1139 | } | |
1140 | ||
4666faab | 1141 | extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
1142 | |
1143 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
1144 | { | |
1145 | if (unlikely(sk->sk_policy[0] != NULL)) { | |
1146 | xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); | |
1147 | sk->sk_policy[0] = NULL; | |
1148 | } | |
1149 | if (unlikely(sk->sk_policy[1] != NULL)) { | |
1150 | xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); | |
1151 | sk->sk_policy[1] = NULL; | |
1152 | } | |
1153 | } | |
1154 | ||
1155 | #else | |
1156 | ||
1157 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
1158 | static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } | |
1159 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } | |
1160 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
1161 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1162 | { | |
1163 | return 1; | |
1164 | } | |
1165 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1166 | { | |
1167 | return 1; | |
1168 | } | |
1169 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1170 | { | |
1171 | return 1; | |
1172 | } | |
d5422efe HX |
1173 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
1174 | struct flowi *fl, | |
1175 | unsigned int family) | |
1176 | { | |
1177 | return -ENOSYS; | |
1178 | } | |
1179 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, | |
1180 | struct sk_buff *skb) | |
1181 | { | |
1182 | return 1; | |
1183 | } | |
1184 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1185 | struct sk_buff *skb) | |
1186 | { | |
1187 | return 1; | |
1188 | } | |
1da177e4 LT |
1189 | #endif |
1190 | ||
1191 | static __inline__ | |
e8a4e377 | 1192 | xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1193 | { |
1194 | switch (family){ | |
1195 | case AF_INET: | |
7e1dc7b6 | 1196 | return (xfrm_address_t *)&fl->u.ip4.daddr; |
1da177e4 | 1197 | case AF_INET6: |
7e1dc7b6 | 1198 | return (xfrm_address_t *)&fl->u.ip6.daddr; |
1da177e4 LT |
1199 | } |
1200 | return NULL; | |
1201 | } | |
1202 | ||
1203 | static __inline__ | |
e8a4e377 | 1204 | xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1205 | { |
1206 | switch (family){ | |
1207 | case AF_INET: | |
7e1dc7b6 | 1208 | return (xfrm_address_t *)&fl->u.ip4.saddr; |
1da177e4 | 1209 | case AF_INET6: |
7e1dc7b6 | 1210 | return (xfrm_address_t *)&fl->u.ip6.saddr; |
1da177e4 LT |
1211 | } |
1212 | return NULL; | |
1213 | } | |
1214 | ||
9bb182a7 | 1215 | static __inline__ |
e8a4e377 | 1216 | void xfrm_flowi_addr_get(const struct flowi *fl, |
9bb182a7 YH |
1217 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
1218 | unsigned short family) | |
1219 | { | |
1220 | switch(family) { | |
1221 | case AF_INET: | |
7e1dc7b6 DM |
1222 | memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); |
1223 | memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); | |
9bb182a7 YH |
1224 | break; |
1225 | case AF_INET6: | |
4e3fd7a0 AD |
1226 | *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr; |
1227 | *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr; | |
9bb182a7 YH |
1228 | break; |
1229 | } | |
1230 | } | |
1231 | ||
1da177e4 | 1232 | static __inline__ int |
f8848067 DM |
1233 | __xfrm4_state_addr_check(const struct xfrm_state *x, |
1234 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 LT |
1235 | { |
1236 | if (daddr->a4 == x->id.daddr.a4 && | |
1237 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
1238 | return 1; | |
1239 | return 0; | |
1240 | } | |
1241 | ||
1242 | static __inline__ int | |
f8848067 DM |
1243 | __xfrm6_state_addr_check(const struct xfrm_state *x, |
1244 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 | 1245 | { |
ff88b30c YH |
1246 | if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && |
1247 | (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || | |
1da177e4 LT |
1248 | ipv6_addr_any((struct in6_addr *)saddr) || |
1249 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) | |
1250 | return 1; | |
1251 | return 0; | |
1252 | } | |
1253 | ||
1254 | static __inline__ int | |
f8848067 DM |
1255 | xfrm_state_addr_check(const struct xfrm_state *x, |
1256 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, | |
1da177e4 LT |
1257 | unsigned short family) |
1258 | { | |
1259 | switch (family) { | |
1260 | case AF_INET: | |
1261 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
1262 | case AF_INET6: | |
1263 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
1264 | } | |
1265 | return 0; | |
1266 | } | |
1267 | ||
e53820de | 1268 | static __inline__ int |
f8848067 | 1269 | xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, |
e53820de MN |
1270 | unsigned short family) |
1271 | { | |
1272 | switch (family) { | |
1273 | case AF_INET: | |
1274 | return __xfrm4_state_addr_check(x, | |
7e1dc7b6 DM |
1275 | (const xfrm_address_t *)&fl->u.ip4.daddr, |
1276 | (const xfrm_address_t *)&fl->u.ip4.saddr); | |
e53820de MN |
1277 | case AF_INET6: |
1278 | return __xfrm6_state_addr_check(x, | |
7e1dc7b6 DM |
1279 | (const xfrm_address_t *)&fl->u.ip6.daddr, |
1280 | (const xfrm_address_t *)&fl->u.ip6.saddr); | |
e53820de MN |
1281 | } |
1282 | return 0; | |
1283 | } | |
1284 | ||
f8848067 | 1285 | static inline int xfrm_state_kern(const struct xfrm_state *x) |
1da177e4 LT |
1286 | { |
1287 | return atomic_read(&x->tunnel_users); | |
1288 | } | |
1289 | ||
5794708f MN |
1290 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1291 | { | |
dc00a525 MN |
1292 | return (!userproto || proto == userproto || |
1293 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
1294 | proto == IPPROTO_ESP || | |
1295 | proto == IPPROTO_COMP))); | |
5794708f MN |
1296 | } |
1297 | ||
1da177e4 LT |
1298 | /* |
1299 | * xfrm algorithm information | |
1300 | */ | |
1a6509d9 HX |
1301 | struct xfrm_algo_aead_info { |
1302 | u16 icv_truncbits; | |
1303 | }; | |
1304 | ||
1da177e4 LT |
1305 | struct xfrm_algo_auth_info { |
1306 | u16 icv_truncbits; | |
1307 | u16 icv_fullbits; | |
1308 | }; | |
1309 | ||
1310 | struct xfrm_algo_encr_info { | |
1311 | u16 blockbits; | |
1312 | u16 defkeybits; | |
1313 | }; | |
1314 | ||
1315 | struct xfrm_algo_comp_info { | |
1316 | u16 threshold; | |
1317 | }; | |
1318 | ||
1319 | struct xfrm_algo_desc { | |
1320 | char *name; | |
04ff1260 | 1321 | char *compat; |
1da177e4 LT |
1322 | u8 available:1; |
1323 | union { | |
1a6509d9 | 1324 | struct xfrm_algo_aead_info aead; |
1da177e4 LT |
1325 | struct xfrm_algo_auth_info auth; |
1326 | struct xfrm_algo_encr_info encr; | |
1327 | struct xfrm_algo_comp_info comp; | |
1328 | } uinfo; | |
1329 | struct sadb_alg desc; | |
1330 | }; | |
1331 | ||
1332 | /* XFRM tunnel handlers. */ | |
1333 | struct xfrm_tunnel { | |
1334 | int (*handler)(struct sk_buff *skb); | |
a6337463 | 1335 | int (*err_handler)(struct sk_buff *skb, u32 info); |
d2acc347 | 1336 | |
b33eab08 | 1337 | struct xfrm_tunnel __rcu *next; |
d2acc347 | 1338 | int priority; |
1da177e4 LT |
1339 | }; |
1340 | ||
1341 | struct xfrm6_tunnel { | |
d2acc347 HX |
1342 | int (*handler)(struct sk_buff *skb); |
1343 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
d5fdd6ba | 1344 | u8 type, u8 code, int offset, __be32 info); |
6f0bcf15 | 1345 | struct xfrm6_tunnel __rcu *next; |
d2acc347 | 1346 | int priority; |
1da177e4 LT |
1347 | }; |
1348 | ||
1349 | extern void xfrm_init(void); | |
703fb94e | 1350 | extern void xfrm4_init(void); |
d62ddc21 AD |
1351 | extern int xfrm_state_init(struct net *net); |
1352 | extern void xfrm_state_fini(struct net *net); | |
1da177e4 | 1353 | extern void xfrm4_state_init(void); |
c35b7e72 DL |
1354 | #ifdef CONFIG_XFRM |
1355 | extern int xfrm6_init(void); | |
1356 | extern void xfrm6_fini(void); | |
0013caba | 1357 | extern int xfrm6_state_init(void); |
1da177e4 | 1358 | extern void xfrm6_state_fini(void); |
c35b7e72 DL |
1359 | #else |
1360 | static inline int xfrm6_init(void) | |
1361 | { | |
1362 | return 0; | |
1363 | } | |
1364 | static inline void xfrm6_fini(void) | |
1365 | { | |
1366 | ; | |
1367 | } | |
1368 | #endif | |
1da177e4 | 1369 | |
558f82ef | 1370 | #ifdef CONFIG_XFRM_STATISTICS |
c68cd1a0 AD |
1371 | extern int xfrm_proc_init(struct net *net); |
1372 | extern void xfrm_proc_fini(struct net *net); | |
558f82ef MN |
1373 | #endif |
1374 | ||
b27aeadb AD |
1375 | extern int xfrm_sysctl_init(struct net *net); |
1376 | #ifdef CONFIG_SYSCTL | |
1377 | extern void xfrm_sysctl_fini(struct net *net); | |
1378 | #else | |
1379 | static inline void xfrm_sysctl_fini(struct net *net) | |
1380 | { | |
1381 | } | |
1382 | #endif | |
1383 | ||
5c182458 | 1384 | extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); |
284fa7da | 1385 | extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
4c563f76 | 1386 | int (*func)(struct xfrm_state *, int, void*), void *); |
abb81c4f | 1387 | extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); |
673c09be | 1388 | extern struct xfrm_state *xfrm_state_alloc(struct net *net); |
33765d06 DM |
1389 | extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, |
1390 | const xfrm_address_t *saddr, | |
b520e9f6 DM |
1391 | const struct flowi *fl, |
1392 | struct xfrm_tmpl *tmpl, | |
1da177e4 LT |
1393 | struct xfrm_policy *pol, int *err, |
1394 | unsigned short family); | |
bd55775c | 1395 | extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, |
5447c5e4 | 1396 | xfrm_address_t *daddr, |
628529b6 JHS |
1397 | xfrm_address_t *saddr, |
1398 | unsigned short family, | |
1399 | u8 mode, u8 proto, u32 reqid); | |
1da177e4 LT |
1400 | extern int xfrm_state_check_expire(struct xfrm_state *x); |
1401 | extern void xfrm_state_insert(struct xfrm_state *x); | |
1402 | extern int xfrm_state_add(struct xfrm_state *x); | |
1403 | extern int xfrm_state_update(struct xfrm_state *x); | |
bd55775c | 1404 | extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, |
a70486f0 | 1405 | const xfrm_address_t *daddr, __be32 spi, |
bd55775c JHS |
1406 | u8 proto, unsigned short family); |
1407 | extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, | |
a70486f0 DM |
1408 | const xfrm_address_t *daddr, |
1409 | const xfrm_address_t *saddr, | |
bd55775c JHS |
1410 | u8 proto, |
1411 | unsigned short family); | |
41a49cc3 MN |
1412 | #ifdef CONFIG_XFRM_SUB_POLICY |
1413 | extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
1414 | int n, unsigned short family); | |
1415 | extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1416 | int n, unsigned short family); | |
1417 | #else | |
1418 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
1419 | int n, unsigned short family) | |
1420 | { | |
1421 | return -ENOSYS; | |
1422 | } | |
1423 | ||
1424 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1425 | int n, unsigned short family) | |
1426 | { | |
1427 | return -ENOSYS; | |
1428 | } | |
1429 | #endif | |
af11e316 JHS |
1430 | |
1431 | struct xfrmk_sadinfo { | |
1432 | u32 sadhcnt; /* current hash bkts */ | |
1433 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1434 | u32 sadcnt; /* current running count */ | |
1435 | }; | |
1436 | ||
5a6d3416 JHS |
1437 | struct xfrmk_spdinfo { |
1438 | u32 incnt; | |
1439 | u32 outcnt; | |
1440 | u32 fwdcnt; | |
1441 | u32 inscnt; | |
1442 | u32 outscnt; | |
1443 | u32 fwdscnt; | |
1444 | u32 spdhcnt; | |
1445 | u32 spdhmcnt; | |
1446 | }; | |
1447 | ||
bd55775c JHS |
1448 | extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, |
1449 | u32 seq); | |
26b15dad | 1450 | extern int xfrm_state_delete(struct xfrm_state *x); |
0e602451 | 1451 | extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); |
e071041b AD |
1452 | extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); |
1453 | extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); | |
2cd08467 | 1454 | extern u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); |
9fdc4883 | 1455 | extern int xfrm_init_replay(struct xfrm_state *x); |
1da177e4 | 1456 | extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); |
a454f0cc | 1457 | extern int __xfrm_init_state(struct xfrm_state *x, bool init_replay); |
72cb6962 | 1458 | extern int xfrm_init_state(struct xfrm_state *x); |
227620e2 | 1459 | extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); |
716062fd HX |
1460 | extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, |
1461 | int encap_type); | |
1bf06cd2 | 1462 | extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); |
c6581a45 | 1463 | extern int xfrm_output_resume(struct sk_buff *skb, int err); |
406ef77c | 1464 | extern int xfrm_output(struct sk_buff *skb); |
df9dcb45 | 1465 | extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
36cf9acf | 1466 | extern int xfrm4_extract_header(struct sk_buff *skb); |
227620e2 | 1467 | extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
c4541b41 HX |
1468 | extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
1469 | int encap_type); | |
716062fd | 1470 | extern int xfrm4_transport_finish(struct sk_buff *skb, int async); |
1da177e4 | 1471 | extern int xfrm4_rcv(struct sk_buff *skb); |
c4541b41 HX |
1472 | |
1473 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1474 | { | |
1475 | return xfrm4_rcv_encap(skb, nexthdr, spi, 0); | |
1476 | } | |
1477 | ||
36cf9acf HX |
1478 | extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1479 | extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1da177e4 | 1480 | extern int xfrm4_output(struct sk_buff *skb); |
43a4dea4 | 1481 | extern int xfrm4_output_finish(struct sk_buff *skb); |
c0d56408 KM |
1482 | extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1483 | extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
eb8637cd S |
1484 | extern int xfrm4_mode_tunnel_input_register(struct xfrm_tunnel *handler); |
1485 | extern int xfrm4_mode_tunnel_input_deregister(struct xfrm_tunnel *handler); | |
36cf9acf | 1486 | extern int xfrm6_extract_header(struct sk_buff *skb); |
227620e2 | 1487 | extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
33b5ecb8 | 1488 | extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); |
716062fd | 1489 | extern int xfrm6_transport_finish(struct sk_buff *skb, int async); |
e5bbef20 | 1490 | extern int xfrm6_rcv(struct sk_buff *skb); |
fbd9a5b4 MN |
1491 | extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, |
1492 | xfrm_address_t *saddr, u8 proto); | |
73d605d1 KM |
1493 | extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
1494 | extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); | |
a1664773 | 1495 | extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
b71d1d42 | 1496 | extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); |
36cf9acf HX |
1497 | extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1498 | extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1da177e4 | 1499 | extern int xfrm6_output(struct sk_buff *skb); |
43a4dea4 | 1500 | extern int xfrm6_output_finish(struct sk_buff *skb); |
aee5adb4 MN |
1501 | extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
1502 | u8 **prevhdr); | |
1da177e4 LT |
1503 | |
1504 | #ifdef CONFIG_XFRM | |
067b207b | 1505 | extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1da177e4 | 1506 | extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); |
1da177e4 LT |
1507 | #else |
1508 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1509 | { | |
1510 | return -ENOPROTOOPT; | |
1511 | } | |
1512 | ||
067b207b | 1513 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
1514 | { |
1515 | /* should not happen */ | |
1516 | kfree_skb(skb); | |
1517 | return 0; | |
1518 | } | |
1da177e4 LT |
1519 | #endif |
1520 | ||
0331b1f3 | 1521 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
4c563f76 | 1522 | |
12a169e7 | 1523 | extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
cdcbca7c | 1524 | extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, |
4c563f76 | 1525 | int (*func)(struct xfrm_policy *, int, int, void*), void *); |
12a169e7 | 1526 | extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); |
1da177e4 | 1527 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
8ca2e93b JHS |
1528 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, |
1529 | u8 type, int dir, | |
4e81bb83 | 1530 | struct xfrm_selector *sel, |
ef41aaa0 EP |
1531 | struct xfrm_sec_ctx *ctx, int delete, |
1532 | int *err); | |
8ca2e93b | 1533 | struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err); |
33ffbbd5 | 1534 | int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); |
1da177e4 | 1535 | u32 xfrm_get_acqseq(void); |
658b219e | 1536 | extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
bd55775c JHS |
1537 | struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark, |
1538 | u8 mode, u32 reqid, u8 proto, | |
a70486f0 DM |
1539 | const xfrm_address_t *daddr, |
1540 | const xfrm_address_t *saddr, int create, | |
bd55775c | 1541 | unsigned short family); |
1da177e4 | 1542 | extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
1da177e4 | 1543 | |
80c9abaa | 1544 | #ifdef CONFIG_XFRM_MIGRATE |
183cad12 DM |
1545 | extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1546 | const struct xfrm_migrate *m, int num_bundles, | |
1547 | const struct xfrm_kmaddress *k); | |
80c9abaa SS |
1548 | extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); |
1549 | extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, | |
1550 | struct xfrm_migrate *m); | |
b4b7c0b3 | 1551 | extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
13c1d189 AE |
1552 | struct xfrm_migrate *m, int num_bundles, |
1553 | struct xfrm_kmaddress *k); | |
80c9abaa SS |
1554 | #endif |
1555 | ||
5d36b180 | 1556 | extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
15e47304 | 1557 | extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); |
db983c11 | 1558 | extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
1da177e4 LT |
1559 | |
1560 | extern void xfrm_input_init(void); | |
6067b2ba | 1561 | extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); |
1da177e4 LT |
1562 | |
1563 | extern void xfrm_probe_algs(void); | |
1564 | extern int xfrm_count_auth_supported(void); | |
1565 | extern int xfrm_count_enc_supported(void); | |
1566 | extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1567 | extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1568 | extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1569 | extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1570 | extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
6f2f19ed DM |
1571 | extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); |
1572 | extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); | |
1573 | extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); | |
1574 | extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, | |
1a6509d9 | 1575 | int probe); |
1da177e4 | 1576 | |
ff6acd16 DM |
1577 | static inline int xfrm_addr_cmp(const xfrm_address_t *a, |
1578 | const xfrm_address_t *b, | |
1da177e4 LT |
1579 | int family) |
1580 | { | |
1581 | switch (family) { | |
1582 | default: | |
1583 | case AF_INET: | |
a6337463 | 1584 | return (__force u32)a->a4 - (__force u32)b->a4; |
1da177e4 | 1585 | case AF_INET6: |
b71d1d42 ED |
1586 | return ipv6_addr_cmp((const struct in6_addr *)a, |
1587 | (const struct in6_addr *)b); | |
1da177e4 LT |
1588 | } |
1589 | } | |
1590 | ||
ff88b30c YH |
1591 | static inline bool xfrm6_addr_equal(const xfrm_address_t *a, |
1592 | const xfrm_address_t *b) | |
1593 | { | |
1594 | return ipv6_addr_equal((const struct in6_addr *)a, | |
1595 | (const struct in6_addr *)b); | |
1596 | } | |
1597 | ||
77d8d7a6 HX |
1598 | static inline int xfrm_policy_id2dir(u32 index) |
1599 | { | |
1600 | return index & 7; | |
1601 | } | |
1602 | ||
a6483b79 AD |
1603 | #ifdef CONFIG_XFRM |
1604 | static inline int xfrm_aevent_is_on(struct net *net) | |
f8cd5488 | 1605 | { |
be33690d PM |
1606 | struct sock *nlsk; |
1607 | int ret = 0; | |
1608 | ||
1609 | rcu_read_lock(); | |
a6483b79 | 1610 | nlsk = rcu_dereference(net->xfrm.nlsk); |
be33690d PM |
1611 | if (nlsk) |
1612 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1613 | rcu_read_unlock(); | |
1614 | return ret; | |
f8cd5488 | 1615 | } |
a6483b79 | 1616 | #endif |
f8cd5488 | 1617 | |
85158621 | 1618 | static inline int xfrm_alg_len(const struct xfrm_algo *alg) |
0f99be0d ED |
1619 | { |
1620 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1621 | } | |
1622 | ||
85158621 | 1623 | static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) |
4447bb33 MW |
1624 | { |
1625 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1626 | } | |
1627 | ||
9736acf3 SK |
1628 | static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) |
1629 | { | |
1630 | return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); | |
1631 | } | |
1632 | ||
80c9abaa | 1633 | #ifdef CONFIG_XFRM_MIGRATE |
af2f464e SK |
1634 | static inline int xfrm_replay_clone(struct xfrm_state *x, |
1635 | struct xfrm_state *orig) | |
1636 | { | |
1637 | x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), | |
1638 | GFP_KERNEL); | |
1639 | if (!x->replay_esn) | |
1640 | return -ENOMEM; | |
1641 | ||
1642 | x->replay_esn->bmp_len = orig->replay_esn->bmp_len; | |
1643 | x->replay_esn->replay_window = orig->replay_esn->replay_window; | |
1644 | ||
1645 | x->preplay_esn = kmemdup(x->replay_esn, | |
1646 | xfrm_replay_state_esn_len(x->replay_esn), | |
1647 | GFP_KERNEL); | |
1648 | if (!x->preplay_esn) { | |
1649 | kfree(x->replay_esn); | |
1650 | return -ENOMEM; | |
1651 | } | |
1652 | ||
1653 | return 0; | |
1654 | } | |
1655 | ||
80c9abaa SS |
1656 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
1657 | { | |
0f99be0d | 1658 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
80c9abaa SS |
1659 | } |
1660 | ||
4447bb33 MW |
1661 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
1662 | { | |
1663 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); | |
1664 | } | |
1665 | ||
80c9abaa SS |
1666 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
1667 | { | |
1668 | int i; | |
1669 | for (i = 0; i < n; i++) | |
1670 | xfrm_state_put(*(states + i)); | |
1671 | } | |
1672 | ||
1673 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1674 | { | |
1675 | int i; | |
1676 | for (i = 0; i < n; i++) | |
1677 | xfrm_state_delete(*(states + i)); | |
1678 | } | |
1679 | #endif | |
f8cd5488 | 1680 | |
def8b4fa | 1681 | #ifdef CONFIG_XFRM |
00501121 HX |
1682 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
1683 | { | |
1684 | return skb->sp->xvec[skb->sp->len - 1]; | |
1685 | } | |
def8b4fa | 1686 | #endif |
00501121 | 1687 | |
bf825f81 JHS |
1688 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
1689 | { | |
1690 | if (attrs[XFRMA_MARK]) | |
4efd7e83 | 1691 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
bf825f81 JHS |
1692 | else |
1693 | m->v = m->m = 0; | |
1694 | ||
1695 | return m->v & m->m; | |
1696 | } | |
1697 | ||
e3dfa389 | 1698 | static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) |
bf825f81 | 1699 | { |
1d1e34dd | 1700 | int ret = 0; |
bf825f81 | 1701 | |
1d1e34dd DM |
1702 | if (m->m | m->v) |
1703 | ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); | |
1704 | return ret; | |
bf825f81 JHS |
1705 | } |
1706 | ||
1da177e4 | 1707 | #endif /* _NET_XFRM_H */ |