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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; | |
a947b0a9 | 165 | u32 extra_flags; |
1da177e4 LT |
166 | } props; |
167 | ||
168 | struct xfrm_lifetime_cfg lft; | |
169 | ||
170 | /* Data for transformer */ | |
4447bb33 | 171 | struct xfrm_algo_auth *aalg; |
1da177e4 LT |
172 | struct xfrm_algo *ealg; |
173 | struct xfrm_algo *calg; | |
1a6509d9 | 174 | struct xfrm_algo_aead *aead; |
1da177e4 LT |
175 | |
176 | /* Data for encapsulator */ | |
177 | struct xfrm_encap_tmpl *encap; | |
178 | ||
060f02a3 NT |
179 | /* Data for care-of address */ |
180 | xfrm_address_t *coaddr; | |
181 | ||
1da177e4 LT |
182 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
183 | struct xfrm_state *tunnel; | |
184 | ||
185 | /* If a tunnel, number of users + 1 */ | |
186 | atomic_t tunnel_users; | |
187 | ||
188 | /* State for replay detection */ | |
189 | struct xfrm_replay_state replay; | |
9736acf3 | 190 | struct xfrm_replay_state_esn *replay_esn; |
1da177e4 | 191 | |
f8cd5488 JHS |
192 | /* Replay detection state at the time we sent the last notification */ |
193 | struct xfrm_replay_state preplay; | |
9736acf3 | 194 | struct xfrm_replay_state_esn *preplay_esn; |
f8cd5488 | 195 | |
9fdc4883 SK |
196 | /* The functions for replay detection. */ |
197 | struct xfrm_replay *repl; | |
198 | ||
2717096a JHS |
199 | /* internal flag that only holds state for delayed aevent at the |
200 | * moment | |
201 | */ | |
202 | u32 xflags; | |
203 | ||
f8cd5488 JHS |
204 | /* Replay detection notification settings */ |
205 | u32 replay_maxage; | |
206 | u32 replay_maxdiff; | |
207 | ||
208 | /* Replay detection notification timer */ | |
209 | struct timer_list rtimer; | |
210 | ||
1da177e4 LT |
211 | /* Statistics */ |
212 | struct xfrm_stats stats; | |
213 | ||
214 | struct xfrm_lifetime_cur curlft; | |
9e0d57fd | 215 | struct tasklet_hrtimer mtimer; |
1da177e4 | 216 | |
e3c0d047 FD |
217 | /* used to fix curlft->add_time when changing date */ |
218 | long saved_tmo; | |
219 | ||
9afaca05 | 220 | /* Last used time */ |
d26f3984 | 221 | unsigned long lastused; |
9afaca05 | 222 | |
1da177e4 LT |
223 | /* Reference to data common to all the instances of this |
224 | * transformer. */ | |
533cb5b0 | 225 | const struct xfrm_type *type; |
13996378 | 226 | struct xfrm_mode *inner_mode; |
df9dcb45 | 227 | struct xfrm_mode *inner_mode_iaf; |
13996378 | 228 | struct xfrm_mode *outer_mode; |
1da177e4 | 229 | |
df71837d TJ |
230 | /* Security context */ |
231 | struct xfrm_sec_ctx *security; | |
232 | ||
1da177e4 LT |
233 | /* Private data of this transformer, format is opaque, |
234 | * interpreted by xfrm_type methods. */ | |
235 | void *data; | |
236 | }; | |
237 | ||
673c09be AD |
238 | static inline struct net *xs_net(struct xfrm_state *x) |
239 | { | |
240 | return read_pnet(&x->xs_net); | |
241 | } | |
242 | ||
2717096a JHS |
243 | /* xflags - make enum if more show up */ |
244 | #define XFRM_TIME_DEFER 1 | |
e3c0d047 | 245 | #define XFRM_SOFT_EXPIRE 2 |
2717096a | 246 | |
1da177e4 LT |
247 | enum { |
248 | XFRM_STATE_VOID, | |
249 | XFRM_STATE_ACQ, | |
250 | XFRM_STATE_VALID, | |
251 | XFRM_STATE_ERROR, | |
252 | XFRM_STATE_EXPIRED, | |
253 | XFRM_STATE_DEAD | |
254 | }; | |
255 | ||
26b15dad | 256 | /* callback structure passed from either netlink or pfkey */ |
fd2c3ef7 | 257 | struct km_event { |
bf08867f HX |
258 | union { |
259 | u32 hard; | |
260 | u32 proto; | |
261 | u32 byid; | |
f8cd5488 | 262 | u32 aevent; |
f7b6983f | 263 | u32 type; |
bf08867f HX |
264 | } data; |
265 | ||
26b15dad | 266 | u32 seq; |
15e47304 | 267 | u32 portid; |
26b15dad | 268 | u32 event; |
7067802e | 269 | struct net *net; |
26b15dad JHS |
270 | }; |
271 | ||
9fdc4883 SK |
272 | struct xfrm_replay { |
273 | void (*advance)(struct xfrm_state *x, __be32 net_seq); | |
274 | int (*check)(struct xfrm_state *x, | |
275 | struct sk_buff *skb, | |
276 | __be32 net_seq); | |
3b59df46 SK |
277 | int (*recheck)(struct xfrm_state *x, |
278 | struct sk_buff *skb, | |
279 | __be32 net_seq); | |
9fdc4883 SK |
280 | void (*notify)(struct xfrm_state *x, int event); |
281 | int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); | |
282 | }; | |
283 | ||
25ee3286 | 284 | struct net_device; |
1da177e4 LT |
285 | struct xfrm_type; |
286 | struct xfrm_dst; | |
287 | struct xfrm_policy_afinfo { | |
288 | unsigned short family; | |
1da177e4 | 289 | struct dst_ops *dst_ops; |
ddcfd796 | 290 | void (*garbage_collect)(struct net *net); |
c5b3cf46 | 291 | struct dst_entry *(*dst_lookup)(struct net *net, int tos, |
5e6b930f DM |
292 | const xfrm_address_t *saddr, |
293 | const xfrm_address_t *daddr); | |
fbda33b2 | 294 | int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr); |
1da177e4 | 295 | void (*decode_session)(struct sk_buff *skb, |
d5422efe HX |
296 | struct flowi *fl, |
297 | int reverse); | |
05d84025 | 298 | int (*get_tos)(const struct flowi *fl); |
9d7b0fc1 PM |
299 | void (*init_dst)(struct net *net, |
300 | struct xfrm_dst *dst); | |
a1b05140 MN |
301 | int (*init_path)(struct xfrm_dst *path, |
302 | struct dst_entry *dst, | |
303 | int nfheader_len); | |
25ee3286 | 304 | int (*fill_dst)(struct xfrm_dst *xdst, |
87c1e12b | 305 | struct net_device *dev, |
0c7b3eef | 306 | const struct flowi *fl); |
2774c131 | 307 | struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); |
1da177e4 LT |
308 | }; |
309 | ||
310 | extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); | |
311 | extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); | |
214e005b DM |
312 | extern void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c); |
313 | extern void km_state_notify(struct xfrm_state *x, const struct km_event *c); | |
1da177e4 LT |
314 | |
315 | struct xfrm_tmpl; | |
980ebd25 | 316 | extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
15e47304 | 317 | extern void km_state_expired(struct xfrm_state *x, int hard, u32 portid); |
53bc6b4d JHS |
318 | extern int __xfrm_state_delete(struct xfrm_state *x); |
319 | ||
1da177e4 | 320 | struct xfrm_state_afinfo { |
17c2a42a | 321 | unsigned int family; |
36cf9acf | 322 | unsigned int proto; |
8e3d716c | 323 | __be16 eth_proto; |
17c2a42a | 324 | struct module *owner; |
533cb5b0 | 325 | const struct xfrm_type *type_map[IPPROTO_MAX]; |
aa5d62cc | 326 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; |
d094cd83 | 327 | int (*init_flags)(struct xfrm_state *x); |
73e5ebb2 DM |
328 | void (*init_tempsel)(struct xfrm_selector *sel, |
329 | const struct flowi *fl); | |
19bd6244 DM |
330 | void (*init_temprop)(struct xfrm_state *x, |
331 | const struct xfrm_tmpl *tmpl, | |
332 | const xfrm_address_t *daddr, | |
333 | const xfrm_address_t *saddr); | |
41a49cc3 MN |
334 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
335 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); | |
cdca7265 | 336 | int (*output)(struct sk_buff *skb); |
43a4dea4 | 337 | int (*output_finish)(struct sk_buff *skb); |
227620e2 HX |
338 | int (*extract_input)(struct xfrm_state *x, |
339 | struct sk_buff *skb); | |
36cf9acf HX |
340 | int (*extract_output)(struct xfrm_state *x, |
341 | struct sk_buff *skb); | |
716062fd HX |
342 | int (*transport_finish)(struct sk_buff *skb, |
343 | int async); | |
1da177e4 LT |
344 | }; |
345 | ||
346 | extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); | |
347 | extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
348 | ||
349 | extern void xfrm_state_delete_tunnel(struct xfrm_state *x); | |
350 | ||
fd2c3ef7 | 351 | struct xfrm_type { |
1da177e4 LT |
352 | char *description; |
353 | struct module *owner; | |
a6337463 | 354 | u8 proto; |
355 | u8 flags; | |
1b5c2299 | 356 | #define XFRM_TYPE_NON_FRAGMENT 1 |
436a0a40 | 357 | #define XFRM_TYPE_REPLAY_PROT 2 |
f04e7e8d HX |
358 | #define XFRM_TYPE_LOCAL_COADDR 4 |
359 | #define XFRM_TYPE_REMOTE_COADDR 8 | |
1da177e4 | 360 | |
72cb6962 | 361 | int (*init_state)(struct xfrm_state *x); |
1da177e4 | 362 | void (*destructor)(struct xfrm_state *); |
e695633e | 363 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 364 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
8f029de2 DM |
365 | int (*reject)(struct xfrm_state *, struct sk_buff *, |
366 | const struct flowi *); | |
aee5adb4 | 367 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
1da177e4 | 368 | /* Estimate maximal size of result of transformation of a dgram */ |
c5c25238 | 369 | u32 (*get_mtu)(struct xfrm_state *, int size); |
1da177e4 LT |
370 | }; |
371 | ||
533cb5b0 ED |
372 | extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
373 | extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); | |
1da177e4 | 374 | |
b59f45d0 | 375 | struct xfrm_mode { |
227620e2 HX |
376 | /* |
377 | * Remove encapsulation header. | |
378 | * | |
379 | * The IP header will be moved over the top of the encapsulation | |
380 | * header. | |
381 | * | |
382 | * On entry, the transport header shall point to where the IP header | |
383 | * should be and the network header shall be set to where the IP | |
384 | * header currently is. skb->data shall point to the start of the | |
385 | * payload. | |
386 | */ | |
387 | int (*input2)(struct xfrm_state *x, struct sk_buff *skb); | |
388 | ||
389 | /* | |
390 | * This is the actual input entry point. | |
391 | * | |
392 | * For transport mode and equivalent this would be identical to | |
393 | * input2 (which does not need to be set). While tunnel mode | |
394 | * and equivalent would set this to the tunnel encapsulation function | |
395 | * xfrm4_prepare_input that would in turn call input2. | |
396 | */ | |
b59f45d0 | 397 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); |
37fedd3a HX |
398 | |
399 | /* | |
400 | * Add encapsulation header. | |
401 | * | |
402 | * On exit, the transport header will be set to the start of the | |
403 | * encapsulation header to be filled in by x->type->output and | |
404 | * the mac header will be set to the nextheader (protocol for | |
405 | * IPv4) field of the extension header directly preceding the | |
406 | * encapsulation header, or in its absence, that of the top IP | |
407 | * header. The value of the network header will always point | |
408 | * to the top IP header while skb->data will point to the payload. | |
409 | */ | |
36cf9acf HX |
410 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); |
411 | ||
412 | /* | |
413 | * This is the actual output entry point. | |
414 | * | |
415 | * For transport mode and equivalent this would be identical to | |
416 | * output2 (which does not need to be set). While tunnel mode | |
417 | * and equivalent would set this to a tunnel encapsulation function | |
418 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn | |
419 | * call output2. | |
420 | */ | |
421 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); | |
b59f45d0 | 422 | |
17c2a42a | 423 | struct xfrm_state_afinfo *afinfo; |
b59f45d0 HX |
424 | struct module *owner; |
425 | unsigned int encap; | |
1bfcb10f HX |
426 | int flags; |
427 | }; | |
428 | ||
429 | /* Flags for xfrm_mode. */ | |
430 | enum { | |
431 | XFRM_MODE_FLAG_TUNNEL = 1, | |
b59f45d0 HX |
432 | }; |
433 | ||
434 | extern int xfrm_register_mode(struct xfrm_mode *mode, int family); | |
435 | extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); | |
b59f45d0 | 436 | |
df9dcb45 KM |
437 | static inline int xfrm_af2proto(unsigned int family) |
438 | { | |
439 | switch(family) { | |
440 | case AF_INET: | |
441 | return IPPROTO_IPIP; | |
442 | case AF_INET6: | |
443 | return IPPROTO_IPV6; | |
444 | default: | |
445 | return 0; | |
446 | } | |
447 | } | |
448 | ||
449 | static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) | |
450 | { | |
451 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || | |
452 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) | |
453 | return x->inner_mode; | |
454 | else | |
455 | return x->inner_mode_iaf; | |
456 | } | |
457 | ||
fd2c3ef7 | 458 | struct xfrm_tmpl { |
1da177e4 LT |
459 | /* id in template is interpreted as: |
460 | * daddr - destination of tunnel, may be zero for transport mode. | |
461 | * spi - zero to acquire spi. Not zero if spi is static, then | |
462 | * daddr must be fixed too. | |
463 | * proto - AH/ESP/IPCOMP | |
464 | */ | |
465 | struct xfrm_id id; | |
466 | ||
467 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
468 | xfrm_address_t saddr; | |
469 | ||
76b3f055 MK |
470 | unsigned short encap_family; |
471 | ||
a6337463 | 472 | u32 reqid; |
1da177e4 | 473 | |
7e49e6de | 474 | /* Mode: transport, tunnel etc. */ |
a6337463 | 475 | u8 mode; |
1da177e4 LT |
476 | |
477 | /* Sharing mode: unique, this session only, this user only etc. */ | |
a6337463 | 478 | u8 share; |
1da177e4 LT |
479 | |
480 | /* May skip this transfomration if no SA is found */ | |
a6337463 | 481 | u8 optional; |
1da177e4 | 482 | |
c5d18e98 | 483 | /* Skip aalgos/ealgos/calgos checks. */ |
a6337463 | 484 | u8 allalgs; |
c5d18e98 | 485 | |
1da177e4 | 486 | /* Bit mask of algos allowed for acquisition */ |
a6337463 | 487 | u32 aalgos; |
488 | u32 ealgos; | |
489 | u32 calgos; | |
1da177e4 LT |
490 | }; |
491 | ||
622dc828 | 492 | #define XFRM_MAX_DEPTH 6 |
1da177e4 | 493 | |
12a169e7 HX |
494 | struct xfrm_policy_walk_entry { |
495 | struct list_head all; | |
496 | u8 dead; | |
497 | }; | |
498 | ||
499 | struct xfrm_policy_walk { | |
500 | struct xfrm_policy_walk_entry walk; | |
501 | u8 type; | |
502 | u32 seq; | |
503 | }; | |
504 | ||
a0073fe1 SK |
505 | struct xfrm_policy_queue { |
506 | struct sk_buff_head hold_queue; | |
507 | struct timer_list hold_timer; | |
508 | unsigned long timeout; | |
509 | }; | |
510 | ||
fd2c3ef7 | 511 | struct xfrm_policy { |
0331b1f3 AD |
512 | #ifdef CONFIG_NET_NS |
513 | struct net *xp_net; | |
514 | #endif | |
2518c7c2 DM |
515 | struct hlist_node bydst; |
516 | struct hlist_node byidx; | |
1da177e4 LT |
517 | |
518 | /* This lock only affects elements except for entry. */ | |
519 | rwlock_t lock; | |
520 | atomic_t refcnt; | |
521 | struct timer_list timer; | |
522 | ||
fe1a5f03 | 523 | struct flow_cache_object flo; |
80c802f3 | 524 | atomic_t genid; |
1da177e4 LT |
525 | u32 priority; |
526 | u32 index; | |
bf825f81 | 527 | struct xfrm_mark mark; |
1da177e4 LT |
528 | struct xfrm_selector selector; |
529 | struct xfrm_lifetime_cfg lft; | |
530 | struct xfrm_lifetime_cur curlft; | |
12a169e7 | 531 | struct xfrm_policy_walk_entry walk; |
a0073fe1 | 532 | struct xfrm_policy_queue polq; |
46ca5f5d ACM |
533 | u8 type; |
534 | u8 action; | |
535 | u8 flags; | |
46ca5f5d | 536 | u8 xfrm_nr; |
12a169e7 | 537 | u16 family; |
df71837d | 538 | struct xfrm_sec_ctx *security; |
1da177e4 LT |
539 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
540 | }; | |
541 | ||
63eb23f5 | 542 | static inline struct net *xp_net(const struct xfrm_policy *xp) |
0331b1f3 AD |
543 | { |
544 | return read_pnet(&xp->xp_net); | |
545 | } | |
546 | ||
13c1d189 AE |
547 | struct xfrm_kmaddress { |
548 | xfrm_address_t local; | |
549 | xfrm_address_t remote; | |
550 | u32 reserved; | |
551 | u16 family; | |
552 | }; | |
553 | ||
80c9abaa SS |
554 | struct xfrm_migrate { |
555 | xfrm_address_t old_daddr; | |
556 | xfrm_address_t old_saddr; | |
557 | xfrm_address_t new_daddr; | |
558 | xfrm_address_t new_saddr; | |
559 | u8 proto; | |
560 | u8 mode; | |
561 | u16 reserved; | |
562 | u32 reqid; | |
563 | u16 old_family; | |
564 | u16 new_family; | |
565 | }; | |
566 | ||
f8cd5488 | 567 | #define XFRM_KM_TIMEOUT 30 |
f8cd5488 JHS |
568 | /* what happened */ |
569 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
570 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
571 | ||
572 | /* default aevent timeout in units of 100ms */ | |
573 | #define XFRM_AE_ETIME 10 | |
574 | /* Async Event timer multiplier */ | |
575 | #define XFRM_AE_ETH_M 10 | |
576 | /* default seq threshold size */ | |
577 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 | 578 | |
fd2c3ef7 | 579 | struct xfrm_mgr { |
1da177e4 LT |
580 | struct list_head list; |
581 | char *id; | |
214e005b | 582 | int (*notify)(struct xfrm_state *x, const struct km_event *c); |
65e0736b | 583 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); |
cb969f07 | 584 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 585 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
214e005b | 586 | int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); |
db983c11 | 587 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
183cad12 DM |
588 | int (*migrate)(const struct xfrm_selector *sel, |
589 | u8 dir, u8 type, | |
590 | const struct xfrm_migrate *m, | |
591 | int num_bundles, | |
592 | const struct xfrm_kmaddress *k); | |
1da177e4 LT |
593 | }; |
594 | ||
595 | extern int xfrm_register_km(struct xfrm_mgr *km); | |
596 | extern int xfrm_unregister_km(struct xfrm_mgr *km); | |
597 | ||
436a0a40 HX |
598 | /* |
599 | * This structure is used for the duration where packets are being | |
600 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
601 | * area beyond the generic IP part may be overwritten. | |
602 | */ | |
603 | struct xfrm_skb_cb { | |
604 | union { | |
605 | struct inet_skb_parm h4; | |
606 | struct inet6_skb_parm h6; | |
607 | } header; | |
608 | ||
609 | /* Sequence number for replay protection. */ | |
b318e0e4 | 610 | union { |
1ce3644a SK |
611 | struct { |
612 | __u32 low; | |
613 | __u32 hi; | |
614 | } output; | |
615 | struct { | |
616 | __be32 low; | |
617 | __be32 hi; | |
618 | } input; | |
b318e0e4 | 619 | } seq; |
436a0a40 HX |
620 | }; |
621 | ||
622 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
623 | ||
36cf9acf HX |
624 | /* |
625 | * This structure is used by the afinfo prepare_input/prepare_output functions | |
626 | * to transmit header information to the mode input/output functions. | |
627 | */ | |
628 | struct xfrm_mode_skb_cb { | |
629 | union { | |
630 | struct inet_skb_parm h4; | |
631 | struct inet6_skb_parm h6; | |
632 | } header; | |
633 | ||
634 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
635 | __be16 id; | |
636 | __be16 frag_off; | |
637 | ||
732c8bd5 HX |
638 | /* IP header length (excluding options or extension headers). */ |
639 | u8 ihl; | |
640 | ||
36cf9acf HX |
641 | /* TOS for IPv4, class for IPv6. */ |
642 | u8 tos; | |
643 | ||
644 | /* TTL for IPv4, hop limitfor IPv6. */ | |
645 | u8 ttl; | |
646 | ||
647 | /* Protocol for IPv4, NH for IPv6. */ | |
648 | u8 protocol; | |
649 | ||
732c8bd5 HX |
650 | /* Option length for IPv4, zero for IPv6. */ |
651 | u8 optlen; | |
652 | ||
36cf9acf HX |
653 | /* Used by IPv6 only, zero for IPv4. */ |
654 | u8 flow_lbl[3]; | |
655 | }; | |
656 | ||
657 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
658 | ||
716062fd HX |
659 | /* |
660 | * This structure is used by the input processing to locate the SPI and | |
661 | * related information. | |
662 | */ | |
663 | struct xfrm_spi_skb_cb { | |
664 | union { | |
665 | struct inet_skb_parm h4; | |
666 | struct inet6_skb_parm h6; | |
667 | } header; | |
668 | ||
716062fd | 669 | unsigned int daddroff; |
2fcb45b6 | 670 | unsigned int family; |
716062fd HX |
671 | }; |
672 | ||
673 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) | |
674 | ||
161a09e7 | 675 | /* Audit Information */ |
fd2c3ef7 | 676 | struct xfrm_audit { |
161a09e7 | 677 | u32 secid; |
e1760bd5 | 678 | kuid_t loginuid; |
2532386f | 679 | u32 sessionid; |
161a09e7 | 680 | }; |
c9204d9c JL |
681 | |
682 | #ifdef CONFIG_AUDITSYSCALL | |
afeb14b4 | 683 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
ab5f5e8b JL |
684 | { |
685 | struct audit_buffer *audit_buf = NULL; | |
ab5f5e8b | 686 | |
afeb14b4 PM |
687 | if (audit_enabled == 0) |
688 | return NULL; | |
ab5f5e8b | 689 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, |
afeb14b4 | 690 | AUDIT_MAC_IPSEC_EVENT); |
ab5f5e8b JL |
691 | if (audit_buf == NULL) |
692 | return NULL; | |
afeb14b4 PM |
693 | audit_log_format(audit_buf, "op=%s", op); |
694 | return audit_buf; | |
695 | } | |
ab5f5e8b | 696 | |
e1760bd5 | 697 | static inline void xfrm_audit_helper_usrinfo(kuid_t auid, u32 ses, u32 secid, |
afeb14b4 PM |
698 | struct audit_buffer *audit_buf) |
699 | { | |
700 | char *secctx; | |
701 | u32 secctx_len; | |
ab5f5e8b | 702 | |
e1760bd5 EB |
703 | audit_log_format(audit_buf, " auid=%u ses=%u", |
704 | from_kuid(&init_user_ns, auid), ses); | |
68277acc PM |
705 | if (secid != 0 && |
706 | security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { | |
ab5f5e8b JL |
707 | audit_log_format(audit_buf, " subj=%s", secctx); |
708 | security_release_secctx(secctx, secctx_len); | |
709 | } else | |
710 | audit_log_task_context(audit_buf); | |
ab5f5e8b JL |
711 | } |
712 | ||
713 | extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
e1760bd5 | 714 | kuid_t auid, u32 ses, u32 secid); |
ab5f5e8b | 715 | extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
e1760bd5 | 716 | kuid_t auid, u32 ses, u32 secid); |
ab5f5e8b | 717 | extern void xfrm_audit_state_add(struct xfrm_state *x, int result, |
e1760bd5 | 718 | kuid_t auid, u32 ses, u32 secid); |
ab5f5e8b | 719 | extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
e1760bd5 | 720 | kuid_t auid, u32 ses, u32 secid); |
afeb14b4 PM |
721 | extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
722 | struct sk_buff *skb); | |
9fdc4883 SK |
723 | extern void xfrm_audit_state_replay(struct xfrm_state *x, |
724 | struct sk_buff *skb, __be32 net_seq); | |
afeb14b4 PM |
725 | extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); |
726 | extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
727 | __be32 net_spi, __be32 net_seq); | |
728 | extern void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
729 | struct sk_buff *skb, u8 proto); | |
c9204d9c | 730 | #else |
41fef0ee MS |
731 | |
732 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
e1760bd5 | 733 | kuid_t auid, u32 ses, u32 secid) |
41fef0ee MS |
734 | { |
735 | } | |
736 | ||
737 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
e1760bd5 | 738 | kuid_t auid, u32 ses, u32 secid) |
41fef0ee MS |
739 | { |
740 | } | |
741 | ||
742 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
e1760bd5 | 743 | kuid_t auid, u32 ses, u32 secid) |
41fef0ee MS |
744 | { |
745 | } | |
746 | ||
747 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
e1760bd5 | 748 | kuid_t auid, u32 ses, u32 secid) |
41fef0ee MS |
749 | { |
750 | } | |
751 | ||
752 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
753 | struct sk_buff *skb) | |
754 | { | |
755 | } | |
756 | ||
9fdc4883 SK |
757 | static inline void xfrm_audit_state_replay(struct xfrm_state *x, |
758 | struct sk_buff *skb, __be32 net_seq) | |
759 | { | |
760 | } | |
761 | ||
41fef0ee MS |
762 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, |
763 | u16 family) | |
764 | { | |
765 | } | |
766 | ||
767 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
768 | __be32 net_spi, __be32 net_seq) | |
769 | { | |
770 | } | |
771 | ||
772 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
773 | struct sk_buff *skb, u8 proto) | |
774 | { | |
775 | } | |
c9204d9c | 776 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 777 | |
1da177e4 LT |
778 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
779 | { | |
780 | if (likely(policy != NULL)) | |
781 | atomic_inc(&policy->refcnt); | |
782 | } | |
783 | ||
64c31b3f | 784 | extern void xfrm_policy_destroy(struct xfrm_policy *policy); |
1da177e4 LT |
785 | |
786 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
787 | { | |
788 | if (atomic_dec_and_test(&policy->refcnt)) | |
64c31b3f | 789 | xfrm_policy_destroy(policy); |
1da177e4 LT |
790 | } |
791 | ||
4e81bb83 MN |
792 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
793 | { | |
794 | int i; | |
795 | for (i = npols - 1; i >= 0; --i) | |
796 | xfrm_pol_put(pols[i]); | |
797 | } | |
4e81bb83 | 798 | |
1da177e4 LT |
799 | extern void __xfrm_state_destroy(struct xfrm_state *); |
800 | ||
21380b81 HX |
801 | static inline void __xfrm_state_put(struct xfrm_state *x) |
802 | { | |
803 | atomic_dec(&x->refcnt); | |
804 | } | |
805 | ||
1da177e4 LT |
806 | static inline void xfrm_state_put(struct xfrm_state *x) |
807 | { | |
808 | if (atomic_dec_and_test(&x->refcnt)) | |
809 | __xfrm_state_destroy(x); | |
810 | } | |
811 | ||
812 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
813 | { | |
814 | atomic_inc(&x->refcnt); | |
815 | } | |
816 | ||
1744a8fe DM |
817 | static inline bool addr_match(const void *token1, const void *token2, |
818 | int prefixlen) | |
1da177e4 | 819 | { |
1744a8fe DM |
820 | const __be32 *a1 = token1; |
821 | const __be32 *a2 = token2; | |
1da177e4 LT |
822 | int pdw; |
823 | int pbi; | |
824 | ||
a6337463 | 825 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
1da177e4 LT |
826 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
827 | ||
828 | if (pdw) | |
829 | if (memcmp(a1, a2, pdw << 2)) | |
1744a8fe | 830 | return false; |
1da177e4 LT |
831 | |
832 | if (pbi) { | |
5f19343f | 833 | __be32 mask; |
1da177e4 LT |
834 | |
835 | mask = htonl((0xffffffff) << (32 - pbi)); | |
836 | ||
837 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
1744a8fe | 838 | return false; |
1da177e4 LT |
839 | } |
840 | ||
1744a8fe | 841 | return true; |
1da177e4 LT |
842 | } |
843 | ||
26bff940 AD |
844 | static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) |
845 | { | |
846 | /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ | |
847 | if (prefixlen == 0) | |
848 | return true; | |
849 | return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen))); | |
850 | } | |
851 | ||
1da177e4 | 852 | static __inline__ |
6281dcc9 | 853 | __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 854 | { |
f9d07e41 | 855 | __be16 port; |
1d28f42c | 856 | switch(fl->flowi_proto) { |
1da177e4 LT |
857 | case IPPROTO_TCP: |
858 | case IPPROTO_UDP: | |
ba4e58ec | 859 | case IPPROTO_UDPLITE: |
1da177e4 | 860 | case IPPROTO_SCTP: |
6281dcc9 | 861 | port = uli->ports.sport; |
1da177e4 LT |
862 | break; |
863 | case IPPROTO_ICMP: | |
864 | case IPPROTO_ICMPV6: | |
6281dcc9 | 865 | port = htons(uli->icmpt.type); |
1da177e4 | 866 | break; |
2ce4272a | 867 | case IPPROTO_MH: |
6281dcc9 | 868 | port = htons(uli->mht.type); |
2ce4272a | 869 | break; |
cc9ff19d | 870 | case IPPROTO_GRE: |
6281dcc9 | 871 | port = htons(ntohl(uli->gre_key) >> 16); |
cc9ff19d | 872 | break; |
1da177e4 LT |
873 | default: |
874 | port = 0; /*XXX*/ | |
875 | } | |
876 | return port; | |
877 | } | |
878 | ||
879 | static __inline__ | |
6281dcc9 | 880 | __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 881 | { |
f9d07e41 | 882 | __be16 port; |
1d28f42c | 883 | switch(fl->flowi_proto) { |
1da177e4 LT |
884 | case IPPROTO_TCP: |
885 | case IPPROTO_UDP: | |
ba4e58ec | 886 | case IPPROTO_UDPLITE: |
1da177e4 | 887 | case IPPROTO_SCTP: |
6281dcc9 | 888 | port = uli->ports.dport; |
1da177e4 LT |
889 | break; |
890 | case IPPROTO_ICMP: | |
891 | case IPPROTO_ICMPV6: | |
6281dcc9 | 892 | port = htons(uli->icmpt.code); |
1da177e4 | 893 | break; |
cc9ff19d | 894 | case IPPROTO_GRE: |
6281dcc9 | 895 | port = htons(ntohl(uli->gre_key) & 0xffff); |
cc9ff19d | 896 | break; |
1da177e4 LT |
897 | default: |
898 | port = 0; /*XXX*/ | |
899 | } | |
900 | return port; | |
901 | } | |
902 | ||
bc9b35ad DM |
903 | extern bool xfrm_selector_match(const struct xfrm_selector *sel, |
904 | const struct flowi *fl, | |
905 | unsigned short family); | |
1da177e4 | 906 | |
df71837d TJ |
907 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
908 | /* If neither has a context --> match | |
909 | * Otherwise, both must have a context and the sids, doi, alg must match | |
910 | */ | |
bc9b35ad | 911 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d TJ |
912 | { |
913 | return ((!s1 && !s2) || | |
914 | (s1 && s2 && | |
915 | (s1->ctx_sid == s2->ctx_sid) && | |
916 | (s1->ctx_doi == s2->ctx_doi) && | |
917 | (s1->ctx_alg == s2->ctx_alg))); | |
918 | } | |
919 | #else | |
bc9b35ad | 920 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d | 921 | { |
bc9b35ad | 922 | return true; |
df71837d TJ |
923 | } |
924 | #endif | |
925 | ||
1da177e4 LT |
926 | /* A struct encoding bundle of transformations to apply to some set of flow. |
927 | * | |
928 | * dst->child points to the next element of bundle. | |
929 | * dst->xfrm points to an instanse of transformer. | |
930 | * | |
931 | * Due to unfortunate limitations of current routing cache, which we | |
932 | * have no time to fix, it mirrors struct rtable and bound to the same | |
933 | * routing key, including saddr,daddr. However, we can have many of | |
934 | * bundles differing by session id. All the bundles grow from a parent | |
935 | * policy rule. | |
936 | */ | |
fd2c3ef7 | 937 | struct xfrm_dst { |
1da177e4 | 938 | union { |
1da177e4 LT |
939 | struct dst_entry dst; |
940 | struct rtable rt; | |
941 | struct rt6_info rt6; | |
942 | } u; | |
943 | struct dst_entry *route; | |
80c802f3 TT |
944 | struct flow_cache_object flo; |
945 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; | |
946 | int num_pols, num_xfrms; | |
157bfc25 MN |
947 | #ifdef CONFIG_XFRM_SUB_POLICY |
948 | struct flowi *origin; | |
949 | struct xfrm_selector *partner; | |
950 | #endif | |
80c802f3 TT |
951 | u32 xfrm_genid; |
952 | u32 policy_genid; | |
1da177e4 LT |
953 | u32 route_mtu_cached; |
954 | u32 child_mtu_cached; | |
92d63dec HY |
955 | u32 route_cookie; |
956 | u32 path_cookie; | |
1da177e4 LT |
957 | }; |
958 | ||
def8b4fa | 959 | #ifdef CONFIG_XFRM |
aabc9761 HX |
960 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
961 | { | |
80c802f3 | 962 | xfrm_pols_put(xdst->pols, xdst->num_pols); |
aabc9761 HX |
963 | dst_release(xdst->route); |
964 | if (likely(xdst->u.dst.xfrm)) | |
965 | xfrm_state_put(xdst->u.dst.xfrm); | |
157bfc25 MN |
966 | #ifdef CONFIG_XFRM_SUB_POLICY |
967 | kfree(xdst->origin); | |
968 | xdst->origin = NULL; | |
969 | kfree(xdst->partner); | |
970 | xdst->partner = NULL; | |
971 | #endif | |
aabc9761 | 972 | } |
def8b4fa | 973 | #endif |
aabc9761 HX |
974 | |
975 | extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); | |
976 | ||
fd2c3ef7 | 977 | struct sec_path { |
1da177e4 LT |
978 | atomic_t refcnt; |
979 | int len; | |
dbe5b4aa | 980 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
1da177e4 LT |
981 | }; |
982 | ||
990078af MS |
983 | static inline int secpath_exists(struct sk_buff *skb) |
984 | { | |
985 | #ifdef CONFIG_XFRM | |
986 | return skb->sp != NULL; | |
987 | #else | |
988 | return 0; | |
989 | #endif | |
990 | } | |
991 | ||
1da177e4 LT |
992 | static inline struct sec_path * |
993 | secpath_get(struct sec_path *sp) | |
994 | { | |
995 | if (sp) | |
996 | atomic_inc(&sp->refcnt); | |
997 | return sp; | |
998 | } | |
999 | ||
1000 | extern void __secpath_destroy(struct sec_path *sp); | |
1001 | ||
1002 | static inline void | |
1003 | secpath_put(struct sec_path *sp) | |
1004 | { | |
1005 | if (sp && atomic_dec_and_test(&sp->refcnt)) | |
1006 | __secpath_destroy(sp); | |
1007 | } | |
1008 | ||
1009 | extern struct sec_path *secpath_dup(struct sec_path *src); | |
1010 | ||
1011 | static inline void | |
1012 | secpath_reset(struct sk_buff *skb) | |
1013 | { | |
1014 | #ifdef CONFIG_XFRM | |
1015 | secpath_put(skb->sp); | |
1016 | skb->sp = NULL; | |
1017 | #endif | |
1018 | } | |
1019 | ||
a1e59abf | 1020 | static inline int |
6cc32961 | 1021 | xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) |
a1e59abf PM |
1022 | { |
1023 | switch (family) { | |
1024 | case AF_INET: | |
1025 | return addr->a4 == 0; | |
1026 | case AF_INET6: | |
1027 | return ipv6_addr_any((struct in6_addr *)&addr->a6); | |
1028 | } | |
1029 | return 0; | |
1030 | } | |
1031 | ||
1da177e4 | 1032 | static inline int |
21eddb5c | 1033 | __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1034 | { |
1035 | return (tmpl->saddr.a4 && | |
1036 | tmpl->saddr.a4 != x->props.saddr.a4); | |
1037 | } | |
1038 | ||
1039 | static inline int | |
21eddb5c | 1040 | __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1041 | { |
1042 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
ff88b30c | 1043 | !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); |
1da177e4 LT |
1044 | } |
1045 | ||
1046 | static inline int | |
21eddb5c | 1047 | xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) |
1da177e4 LT |
1048 | { |
1049 | switch (family) { | |
1050 | case AF_INET: | |
1051 | return __xfrm4_state_addr_cmp(tmpl, x); | |
1052 | case AF_INET6: | |
1053 | return __xfrm6_state_addr_cmp(tmpl, x); | |
1054 | } | |
1055 | return !0; | |
1056 | } | |
1057 | ||
1058 | #ifdef CONFIG_XFRM | |
1da177e4 LT |
1059 | extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); |
1060 | ||
d5422efe HX |
1061 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
1062 | struct sk_buff *skb, | |
1063 | unsigned int family, int reverse) | |
1da177e4 | 1064 | { |
f6e1e25d | 1065 | struct net *net = dev_net(skb->dev); |
d5422efe HX |
1066 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
1067 | ||
1da177e4 | 1068 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
d5422efe | 1069 | return __xfrm_policy_check(sk, ndir, skb, family); |
4e81bb83 | 1070 | |
f6e1e25d | 1071 | return (!net->xfrm.policy_count[dir] && !skb->sp) || |
adf30907 | 1072 | (skb_dst(skb)->flags & DST_NOPOLICY) || |
d5422efe HX |
1073 | __xfrm_policy_check(sk, ndir, skb, family); |
1074 | } | |
1075 | ||
1076 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1077 | { | |
1078 | return __xfrm_policy_check2(sk, dir, skb, family, 0); | |
1da177e4 LT |
1079 | } |
1080 | ||
1081 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1082 | { | |
1083 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
1084 | } | |
1085 | ||
1086 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1087 | { | |
1088 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
1089 | } | |
1090 | ||
d5422efe HX |
1091 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1092 | struct sk_buff *skb) | |
1093 | { | |
1094 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); | |
1095 | } | |
1096 | ||
1097 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1098 | struct sk_buff *skb) | |
1099 | { | |
1100 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); | |
1101 | } | |
1102 | ||
1103 | extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1104 | unsigned int family, int reverse); | |
1105 | ||
1106 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1107 | unsigned int family) | |
1108 | { | |
1109 | return __xfrm_decode_session(skb, fl, family, 0); | |
1110 | } | |
1111 | ||
1112 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, | |
1113 | struct flowi *fl, | |
1114 | unsigned int family) | |
1115 | { | |
1116 | return __xfrm_decode_session(skb, fl, family, 1); | |
1117 | } | |
1118 | ||
1da177e4 LT |
1119 | extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
1120 | ||
1121 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
1122 | { | |
99a66657 AD |
1123 | struct net *net = dev_net(skb->dev); |
1124 | ||
1125 | return !net->xfrm.policy_count[XFRM_POLICY_OUT] || | |
adf30907 | 1126 | (skb_dst(skb)->flags & DST_NOXFRM) || |
1da177e4 LT |
1127 | __xfrm_route_forward(skb, family); |
1128 | } | |
1129 | ||
1130 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
1131 | { | |
1132 | return xfrm_route_forward(skb, AF_INET); | |
1133 | } | |
1134 | ||
1135 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
1136 | { | |
1137 | return xfrm_route_forward(skb, AF_INET6); | |
1138 | } | |
1139 | ||
1140 | extern int __xfrm_sk_clone_policy(struct sock *sk); | |
1141 | ||
1142 | static inline int xfrm_sk_clone_policy(struct sock *sk) | |
1143 | { | |
1144 | if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) | |
1145 | return __xfrm_sk_clone_policy(sk); | |
1146 | return 0; | |
1147 | } | |
1148 | ||
4666faab | 1149 | extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
1150 | |
1151 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
1152 | { | |
1153 | if (unlikely(sk->sk_policy[0] != NULL)) { | |
1154 | xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); | |
1155 | sk->sk_policy[0] = NULL; | |
1156 | } | |
1157 | if (unlikely(sk->sk_policy[1] != NULL)) { | |
1158 | xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); | |
1159 | sk->sk_policy[1] = NULL; | |
1160 | } | |
1161 | } | |
1162 | ||
e4c17216 PM |
1163 | extern void xfrm_garbage_collect(struct net *net); |
1164 | ||
1da177e4 LT |
1165 | #else |
1166 | ||
1167 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
1168 | static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } | |
1169 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } | |
1170 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
1171 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1172 | { | |
1173 | return 1; | |
1174 | } | |
1175 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1176 | { | |
1177 | return 1; | |
1178 | } | |
1179 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1180 | { | |
1181 | return 1; | |
1182 | } | |
d5422efe HX |
1183 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
1184 | struct flowi *fl, | |
1185 | unsigned int family) | |
1186 | { | |
1187 | return -ENOSYS; | |
1188 | } | |
1189 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, | |
1190 | struct sk_buff *skb) | |
1191 | { | |
1192 | return 1; | |
1193 | } | |
1194 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1195 | struct sk_buff *skb) | |
1196 | { | |
1197 | return 1; | |
1198 | } | |
e4c17216 PM |
1199 | static inline void xfrm_garbage_collect(struct net *net) |
1200 | { | |
1201 | } | |
1da177e4 LT |
1202 | #endif |
1203 | ||
1204 | static __inline__ | |
e8a4e377 | 1205 | xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1206 | { |
1207 | switch (family){ | |
1208 | case AF_INET: | |
7e1dc7b6 | 1209 | return (xfrm_address_t *)&fl->u.ip4.daddr; |
1da177e4 | 1210 | case AF_INET6: |
7e1dc7b6 | 1211 | return (xfrm_address_t *)&fl->u.ip6.daddr; |
1da177e4 LT |
1212 | } |
1213 | return NULL; | |
1214 | } | |
1215 | ||
1216 | static __inline__ | |
e8a4e377 | 1217 | xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1218 | { |
1219 | switch (family){ | |
1220 | case AF_INET: | |
7e1dc7b6 | 1221 | return (xfrm_address_t *)&fl->u.ip4.saddr; |
1da177e4 | 1222 | case AF_INET6: |
7e1dc7b6 | 1223 | return (xfrm_address_t *)&fl->u.ip6.saddr; |
1da177e4 LT |
1224 | } |
1225 | return NULL; | |
1226 | } | |
1227 | ||
9bb182a7 | 1228 | static __inline__ |
e8a4e377 | 1229 | void xfrm_flowi_addr_get(const struct flowi *fl, |
9bb182a7 YH |
1230 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
1231 | unsigned short family) | |
1232 | { | |
1233 | switch(family) { | |
1234 | case AF_INET: | |
7e1dc7b6 DM |
1235 | memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); |
1236 | memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); | |
9bb182a7 YH |
1237 | break; |
1238 | case AF_INET6: | |
4e3fd7a0 AD |
1239 | *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr; |
1240 | *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr; | |
9bb182a7 YH |
1241 | break; |
1242 | } | |
1243 | } | |
1244 | ||
1da177e4 | 1245 | static __inline__ int |
f8848067 DM |
1246 | __xfrm4_state_addr_check(const struct xfrm_state *x, |
1247 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 LT |
1248 | { |
1249 | if (daddr->a4 == x->id.daddr.a4 && | |
1250 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
1251 | return 1; | |
1252 | return 0; | |
1253 | } | |
1254 | ||
1255 | static __inline__ int | |
f8848067 DM |
1256 | __xfrm6_state_addr_check(const struct xfrm_state *x, |
1257 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 | 1258 | { |
ff88b30c YH |
1259 | if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && |
1260 | (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || | |
1da177e4 LT |
1261 | ipv6_addr_any((struct in6_addr *)saddr) || |
1262 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) | |
1263 | return 1; | |
1264 | return 0; | |
1265 | } | |
1266 | ||
1267 | static __inline__ int | |
f8848067 DM |
1268 | xfrm_state_addr_check(const struct xfrm_state *x, |
1269 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, | |
1da177e4 LT |
1270 | unsigned short family) |
1271 | { | |
1272 | switch (family) { | |
1273 | case AF_INET: | |
1274 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
1275 | case AF_INET6: | |
1276 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
1277 | } | |
1278 | return 0; | |
1279 | } | |
1280 | ||
e53820de | 1281 | static __inline__ int |
f8848067 | 1282 | xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, |
e53820de MN |
1283 | unsigned short family) |
1284 | { | |
1285 | switch (family) { | |
1286 | case AF_INET: | |
1287 | return __xfrm4_state_addr_check(x, | |
7e1dc7b6 DM |
1288 | (const xfrm_address_t *)&fl->u.ip4.daddr, |
1289 | (const xfrm_address_t *)&fl->u.ip4.saddr); | |
e53820de MN |
1290 | case AF_INET6: |
1291 | return __xfrm6_state_addr_check(x, | |
7e1dc7b6 DM |
1292 | (const xfrm_address_t *)&fl->u.ip6.daddr, |
1293 | (const xfrm_address_t *)&fl->u.ip6.saddr); | |
e53820de MN |
1294 | } |
1295 | return 0; | |
1296 | } | |
1297 | ||
f8848067 | 1298 | static inline int xfrm_state_kern(const struct xfrm_state *x) |
1da177e4 LT |
1299 | { |
1300 | return atomic_read(&x->tunnel_users); | |
1301 | } | |
1302 | ||
5794708f MN |
1303 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1304 | { | |
dc00a525 MN |
1305 | return (!userproto || proto == userproto || |
1306 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
1307 | proto == IPPROTO_ESP || | |
1308 | proto == IPPROTO_COMP))); | |
5794708f MN |
1309 | } |
1310 | ||
1da177e4 LT |
1311 | /* |
1312 | * xfrm algorithm information | |
1313 | */ | |
1a6509d9 HX |
1314 | struct xfrm_algo_aead_info { |
1315 | u16 icv_truncbits; | |
1316 | }; | |
1317 | ||
1da177e4 LT |
1318 | struct xfrm_algo_auth_info { |
1319 | u16 icv_truncbits; | |
1320 | u16 icv_fullbits; | |
1321 | }; | |
1322 | ||
1323 | struct xfrm_algo_encr_info { | |
1324 | u16 blockbits; | |
1325 | u16 defkeybits; | |
1326 | }; | |
1327 | ||
1328 | struct xfrm_algo_comp_info { | |
1329 | u16 threshold; | |
1330 | }; | |
1331 | ||
1332 | struct xfrm_algo_desc { | |
1333 | char *name; | |
04ff1260 | 1334 | char *compat; |
1da177e4 | 1335 | u8 available:1; |
7e50f84c | 1336 | u8 pfkey_supported:1; |
1da177e4 | 1337 | union { |
1a6509d9 | 1338 | struct xfrm_algo_aead_info aead; |
1da177e4 LT |
1339 | struct xfrm_algo_auth_info auth; |
1340 | struct xfrm_algo_encr_info encr; | |
1341 | struct xfrm_algo_comp_info comp; | |
1342 | } uinfo; | |
1343 | struct sadb_alg desc; | |
1344 | }; | |
1345 | ||
1346 | /* XFRM tunnel handlers. */ | |
1347 | struct xfrm_tunnel { | |
1348 | int (*handler)(struct sk_buff *skb); | |
a6337463 | 1349 | int (*err_handler)(struct sk_buff *skb, u32 info); |
d2acc347 | 1350 | |
b33eab08 | 1351 | struct xfrm_tunnel __rcu *next; |
d2acc347 | 1352 | int priority; |
1da177e4 LT |
1353 | }; |
1354 | ||
1355 | struct xfrm6_tunnel { | |
d2acc347 HX |
1356 | int (*handler)(struct sk_buff *skb); |
1357 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
d5fdd6ba | 1358 | u8 type, u8 code, int offset, __be32 info); |
6f0bcf15 | 1359 | struct xfrm6_tunnel __rcu *next; |
d2acc347 | 1360 | int priority; |
1da177e4 LT |
1361 | }; |
1362 | ||
1363 | extern void xfrm_init(void); | |
703fb94e | 1364 | extern void xfrm4_init(void); |
d62ddc21 AD |
1365 | extern int xfrm_state_init(struct net *net); |
1366 | extern void xfrm_state_fini(struct net *net); | |
1da177e4 | 1367 | extern void xfrm4_state_init(void); |
c35b7e72 DL |
1368 | #ifdef CONFIG_XFRM |
1369 | extern int xfrm6_init(void); | |
1370 | extern void xfrm6_fini(void); | |
0013caba | 1371 | extern int xfrm6_state_init(void); |
1da177e4 | 1372 | extern void xfrm6_state_fini(void); |
c35b7e72 DL |
1373 | #else |
1374 | static inline int xfrm6_init(void) | |
1375 | { | |
1376 | return 0; | |
1377 | } | |
1378 | static inline void xfrm6_fini(void) | |
1379 | { | |
1380 | ; | |
1381 | } | |
1382 | #endif | |
1da177e4 | 1383 | |
558f82ef | 1384 | #ifdef CONFIG_XFRM_STATISTICS |
c68cd1a0 AD |
1385 | extern int xfrm_proc_init(struct net *net); |
1386 | extern void xfrm_proc_fini(struct net *net); | |
558f82ef MN |
1387 | #endif |
1388 | ||
b27aeadb AD |
1389 | extern int xfrm_sysctl_init(struct net *net); |
1390 | #ifdef CONFIG_SYSCTL | |
1391 | extern void xfrm_sysctl_fini(struct net *net); | |
1392 | #else | |
1393 | static inline void xfrm_sysctl_fini(struct net *net) | |
1394 | { | |
1395 | } | |
1396 | #endif | |
1397 | ||
5c182458 | 1398 | extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); |
284fa7da | 1399 | extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
4c563f76 | 1400 | int (*func)(struct xfrm_state *, int, void*), void *); |
abb81c4f | 1401 | extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); |
673c09be | 1402 | extern struct xfrm_state *xfrm_state_alloc(struct net *net); |
33765d06 DM |
1403 | extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, |
1404 | const xfrm_address_t *saddr, | |
b520e9f6 DM |
1405 | const struct flowi *fl, |
1406 | struct xfrm_tmpl *tmpl, | |
1da177e4 LT |
1407 | struct xfrm_policy *pol, int *err, |
1408 | unsigned short family); | |
bd55775c | 1409 | extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, |
5447c5e4 | 1410 | xfrm_address_t *daddr, |
628529b6 JHS |
1411 | xfrm_address_t *saddr, |
1412 | unsigned short family, | |
1413 | u8 mode, u8 proto, u32 reqid); | |
1da177e4 LT |
1414 | extern int xfrm_state_check_expire(struct xfrm_state *x); |
1415 | extern void xfrm_state_insert(struct xfrm_state *x); | |
1416 | extern int xfrm_state_add(struct xfrm_state *x); | |
1417 | extern int xfrm_state_update(struct xfrm_state *x); | |
bd55775c | 1418 | extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, |
a70486f0 | 1419 | const xfrm_address_t *daddr, __be32 spi, |
bd55775c JHS |
1420 | u8 proto, unsigned short family); |
1421 | extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, | |
a70486f0 DM |
1422 | const xfrm_address_t *daddr, |
1423 | const xfrm_address_t *saddr, | |
bd55775c JHS |
1424 | u8 proto, |
1425 | unsigned short family); | |
41a49cc3 MN |
1426 | #ifdef CONFIG_XFRM_SUB_POLICY |
1427 | extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
1428 | int n, unsigned short family); | |
1429 | extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1430 | int n, unsigned short family); | |
1431 | #else | |
1432 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
1433 | int n, unsigned short family) | |
1434 | { | |
1435 | return -ENOSYS; | |
1436 | } | |
1437 | ||
1438 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1439 | int n, unsigned short family) | |
1440 | { | |
1441 | return -ENOSYS; | |
1442 | } | |
1443 | #endif | |
af11e316 JHS |
1444 | |
1445 | struct xfrmk_sadinfo { | |
1446 | u32 sadhcnt; /* current hash bkts */ | |
1447 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1448 | u32 sadcnt; /* current running count */ | |
1449 | }; | |
1450 | ||
5a6d3416 JHS |
1451 | struct xfrmk_spdinfo { |
1452 | u32 incnt; | |
1453 | u32 outcnt; | |
1454 | u32 fwdcnt; | |
1455 | u32 inscnt; | |
1456 | u32 outscnt; | |
1457 | u32 fwdscnt; | |
1458 | u32 spdhcnt; | |
1459 | u32 spdhmcnt; | |
1460 | }; | |
1461 | ||
bd55775c JHS |
1462 | extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, |
1463 | u32 seq); | |
26b15dad | 1464 | extern int xfrm_state_delete(struct xfrm_state *x); |
0e602451 | 1465 | extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); |
e071041b AD |
1466 | extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); |
1467 | extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); | |
2cd08467 | 1468 | extern u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); |
9fdc4883 | 1469 | extern int xfrm_init_replay(struct xfrm_state *x); |
1da177e4 | 1470 | extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); |
a454f0cc | 1471 | extern int __xfrm_init_state(struct xfrm_state *x, bool init_replay); |
72cb6962 | 1472 | extern int xfrm_init_state(struct xfrm_state *x); |
227620e2 | 1473 | extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); |
716062fd HX |
1474 | extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, |
1475 | int encap_type); | |
1bf06cd2 | 1476 | extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); |
c6581a45 | 1477 | extern int xfrm_output_resume(struct sk_buff *skb, int err); |
406ef77c | 1478 | extern int xfrm_output(struct sk_buff *skb); |
df9dcb45 | 1479 | extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
36cf9acf | 1480 | extern int xfrm4_extract_header(struct sk_buff *skb); |
227620e2 | 1481 | extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
c4541b41 HX |
1482 | extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
1483 | int encap_type); | |
716062fd | 1484 | extern int xfrm4_transport_finish(struct sk_buff *skb, int async); |
1da177e4 | 1485 | extern int xfrm4_rcv(struct sk_buff *skb); |
c4541b41 HX |
1486 | |
1487 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1488 | { | |
1489 | return xfrm4_rcv_encap(skb, nexthdr, spi, 0); | |
1490 | } | |
1491 | ||
36cf9acf HX |
1492 | extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1493 | extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1da177e4 | 1494 | extern int xfrm4_output(struct sk_buff *skb); |
43a4dea4 | 1495 | extern int xfrm4_output_finish(struct sk_buff *skb); |
c0d56408 KM |
1496 | extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1497 | extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
eb8637cd S |
1498 | extern int xfrm4_mode_tunnel_input_register(struct xfrm_tunnel *handler); |
1499 | extern int xfrm4_mode_tunnel_input_deregister(struct xfrm_tunnel *handler); | |
36cf9acf | 1500 | extern int xfrm6_extract_header(struct sk_buff *skb); |
227620e2 | 1501 | extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
33b5ecb8 | 1502 | extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); |
716062fd | 1503 | extern int xfrm6_transport_finish(struct sk_buff *skb, int async); |
e5bbef20 | 1504 | extern int xfrm6_rcv(struct sk_buff *skb); |
fbd9a5b4 MN |
1505 | extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, |
1506 | xfrm_address_t *saddr, u8 proto); | |
73d605d1 KM |
1507 | extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
1508 | extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); | |
a1664773 | 1509 | extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
b71d1d42 | 1510 | extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); |
36cf9acf HX |
1511 | extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1512 | extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1da177e4 | 1513 | extern int xfrm6_output(struct sk_buff *skb); |
43a4dea4 | 1514 | extern int xfrm6_output_finish(struct sk_buff *skb); |
aee5adb4 MN |
1515 | extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
1516 | u8 **prevhdr); | |
1da177e4 LT |
1517 | |
1518 | #ifdef CONFIG_XFRM | |
067b207b | 1519 | extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1da177e4 | 1520 | extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); |
1da177e4 LT |
1521 | #else |
1522 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1523 | { | |
1524 | return -ENOPROTOOPT; | |
1525 | } | |
1526 | ||
067b207b | 1527 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
1528 | { |
1529 | /* should not happen */ | |
1530 | kfree_skb(skb); | |
1531 | return 0; | |
1532 | } | |
1da177e4 LT |
1533 | #endif |
1534 | ||
0331b1f3 | 1535 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
4c563f76 | 1536 | |
12a169e7 | 1537 | extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
cdcbca7c | 1538 | extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, |
4c563f76 | 1539 | int (*func)(struct xfrm_policy *, int, int, void*), void *); |
12a169e7 | 1540 | extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); |
1da177e4 | 1541 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
8ca2e93b JHS |
1542 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, |
1543 | u8 type, int dir, | |
4e81bb83 | 1544 | struct xfrm_selector *sel, |
ef41aaa0 EP |
1545 | struct xfrm_sec_ctx *ctx, int delete, |
1546 | int *err); | |
8ca2e93b | 1547 | struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err); |
33ffbbd5 | 1548 | int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); |
1da177e4 | 1549 | u32 xfrm_get_acqseq(void); |
658b219e | 1550 | extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
e473fcb4 | 1551 | struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, |
bd55775c | 1552 | u8 mode, u32 reqid, u8 proto, |
a70486f0 DM |
1553 | const xfrm_address_t *daddr, |
1554 | const xfrm_address_t *saddr, int create, | |
bd55775c | 1555 | unsigned short family); |
1da177e4 | 1556 | extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
1da177e4 | 1557 | |
80c9abaa | 1558 | #ifdef CONFIG_XFRM_MIGRATE |
183cad12 DM |
1559 | extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1560 | const struct xfrm_migrate *m, int num_bundles, | |
1561 | const struct xfrm_kmaddress *k); | |
80c9abaa SS |
1562 | extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); |
1563 | extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, | |
1564 | struct xfrm_migrate *m); | |
b4b7c0b3 | 1565 | extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
13c1d189 AE |
1566 | struct xfrm_migrate *m, int num_bundles, |
1567 | struct xfrm_kmaddress *k); | |
80c9abaa SS |
1568 | #endif |
1569 | ||
5d36b180 | 1570 | extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
15e47304 | 1571 | extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); |
db983c11 | 1572 | extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
1da177e4 LT |
1573 | |
1574 | extern void xfrm_input_init(void); | |
6067b2ba | 1575 | extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); |
1da177e4 LT |
1576 | |
1577 | extern void xfrm_probe_algs(void); | |
7e50f84c JK |
1578 | extern int xfrm_count_pfkey_auth_supported(void); |
1579 | extern int xfrm_count_pfkey_enc_supported(void); | |
1da177e4 LT |
1580 | extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); |
1581 | extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1582 | extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1583 | extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1584 | extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
6f2f19ed DM |
1585 | extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); |
1586 | extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); | |
1587 | extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); | |
1588 | extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, | |
1a6509d9 | 1589 | int probe); |
1da177e4 | 1590 | |
70e94e66 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 | ||
1598 | static inline bool xfrm_addr_equal(const xfrm_address_t *a, | |
1599 | const xfrm_address_t *b, | |
1600 | sa_family_t family) | |
1da177e4 LT |
1601 | { |
1602 | switch (family) { | |
1603 | default: | |
1604 | case AF_INET: | |
70e94e66 | 1605 | return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; |
1da177e4 | 1606 | case AF_INET6: |
70e94e66 | 1607 | return xfrm6_addr_equal(a, b); |
1da177e4 LT |
1608 | } |
1609 | } | |
1610 | ||
77d8d7a6 HX |
1611 | static inline int xfrm_policy_id2dir(u32 index) |
1612 | { | |
1613 | return index & 7; | |
1614 | } | |
1615 | ||
a6483b79 AD |
1616 | #ifdef CONFIG_XFRM |
1617 | static inline int xfrm_aevent_is_on(struct net *net) | |
f8cd5488 | 1618 | { |
be33690d PM |
1619 | struct sock *nlsk; |
1620 | int ret = 0; | |
1621 | ||
1622 | rcu_read_lock(); | |
a6483b79 | 1623 | nlsk = rcu_dereference(net->xfrm.nlsk); |
be33690d PM |
1624 | if (nlsk) |
1625 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1626 | rcu_read_unlock(); | |
1627 | return ret; | |
f8cd5488 | 1628 | } |
a6483b79 | 1629 | #endif |
f8cd5488 | 1630 | |
85158621 | 1631 | static inline int xfrm_alg_len(const struct xfrm_algo *alg) |
0f99be0d ED |
1632 | { |
1633 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1634 | } | |
1635 | ||
85158621 | 1636 | static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) |
4447bb33 MW |
1637 | { |
1638 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1639 | } | |
1640 | ||
9736acf3 SK |
1641 | static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) |
1642 | { | |
1643 | return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); | |
1644 | } | |
1645 | ||
80c9abaa | 1646 | #ifdef CONFIG_XFRM_MIGRATE |
af2f464e SK |
1647 | static inline int xfrm_replay_clone(struct xfrm_state *x, |
1648 | struct xfrm_state *orig) | |
1649 | { | |
1650 | x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), | |
1651 | GFP_KERNEL); | |
1652 | if (!x->replay_esn) | |
1653 | return -ENOMEM; | |
1654 | ||
1655 | x->replay_esn->bmp_len = orig->replay_esn->bmp_len; | |
1656 | x->replay_esn->replay_window = orig->replay_esn->replay_window; | |
1657 | ||
1658 | x->preplay_esn = kmemdup(x->replay_esn, | |
1659 | xfrm_replay_state_esn_len(x->replay_esn), | |
1660 | GFP_KERNEL); | |
1661 | if (!x->preplay_esn) { | |
1662 | kfree(x->replay_esn); | |
1663 | return -ENOMEM; | |
1664 | } | |
1665 | ||
1666 | return 0; | |
1667 | } | |
1668 | ||
80c9abaa SS |
1669 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
1670 | { | |
0f99be0d | 1671 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
80c9abaa SS |
1672 | } |
1673 | ||
4447bb33 MW |
1674 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
1675 | { | |
1676 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); | |
1677 | } | |
1678 | ||
80c9abaa SS |
1679 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
1680 | { | |
1681 | int i; | |
1682 | for (i = 0; i < n; i++) | |
1683 | xfrm_state_put(*(states + i)); | |
1684 | } | |
1685 | ||
1686 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1687 | { | |
1688 | int i; | |
1689 | for (i = 0; i < n; i++) | |
1690 | xfrm_state_delete(*(states + i)); | |
1691 | } | |
1692 | #endif | |
f8cd5488 | 1693 | |
def8b4fa | 1694 | #ifdef CONFIG_XFRM |
00501121 HX |
1695 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
1696 | { | |
1697 | return skb->sp->xvec[skb->sp->len - 1]; | |
1698 | } | |
def8b4fa | 1699 | #endif |
00501121 | 1700 | |
bf825f81 JHS |
1701 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
1702 | { | |
1703 | if (attrs[XFRMA_MARK]) | |
4efd7e83 | 1704 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
bf825f81 JHS |
1705 | else |
1706 | m->v = m->m = 0; | |
1707 | ||
1708 | return m->v & m->m; | |
1709 | } | |
1710 | ||
e3dfa389 | 1711 | static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) |
bf825f81 | 1712 | { |
1d1e34dd | 1713 | int ret = 0; |
bf825f81 | 1714 | |
1d1e34dd DM |
1715 | if (m->m | m->v) |
1716 | ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); | |
1717 | return ret; | |
bf825f81 JHS |
1718 | } |
1719 | ||
1da177e4 | 1720 | #endif /* _NET_XFRM_H */ |