Commit | Line | Data |
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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 | ||
1da177e4 | 39 | #define XFRM_ALIGN8(len) (((len) + 7) & ~7) |
b59f45d0 HX |
40 | #define MODULE_ALIAS_XFRM_MODE(family, encap) \ |
41 | MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) | |
d3d6dd3a MN |
42 | #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ |
43 | MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) | |
1da177e4 | 44 | |
558f82ef | 45 | #ifdef CONFIG_XFRM_STATISTICS |
59c9940e AD |
46 | #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) |
47 | #define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field) | |
48 | #define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field) | |
558f82ef | 49 | #else |
59c9940e AD |
50 | #define XFRM_INC_STATS(net, field) ((void)(net)) |
51 | #define XFRM_INC_STATS_BH(net, field) ((void)(net)) | |
52 | #define XFRM_INC_STATS_USER(net, field) ((void)(net)) | |
558f82ef MN |
53 | #endif |
54 | ||
4a3e2f71 | 55 | extern struct mutex xfrm_cfg_mutex; |
1da177e4 LT |
56 | |
57 | /* Organization of SPD aka "XFRM rules" | |
58 | ------------------------------------ | |
59 | ||
60 | Basic objects: | |
61 | - policy rule, struct xfrm_policy (=SPD entry) | |
62 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) | |
63 | - instance of a transformer, struct xfrm_state (=SA) | |
64 | - template to clone xfrm_state, struct xfrm_tmpl | |
65 | ||
66 | SPD is plain linear list of xfrm_policy rules, ordered by priority. | |
67 | (To be compatible with existing pfkeyv2 implementations, | |
68 | many rules with priority of 0x7fffffff are allowed to exist and | |
69 | such rules are ordered in an unpredictable way, thanks to bsd folks.) | |
70 | ||
71 | Lookup is plain linear search until the first match with selector. | |
72 | ||
73 | If "action" is "block", then we prohibit the flow, otherwise: | |
74 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, | |
75 | policy entry has list of up to XFRM_MAX_DEPTH transformations, | |
76 | described by templates xfrm_tmpl. Each template is resolved | |
77 | to a complete xfrm_state (see below) and we pack bundle of transformations | |
78 | to a dst_entry returned to requestor. | |
79 | ||
80 | dst -. xfrm .-> xfrm_state #1 | |
81 | |---. child .-> dst -. xfrm .-> xfrm_state #2 | |
82 | |---. child .-> dst -. xfrm .-> xfrm_state #3 | |
83 | |---. child .-> NULL | |
84 | ||
85 | Bundles are cached at xrfm_policy struct (field ->bundles). | |
86 | ||
87 | ||
88 | Resolution of xrfm_tmpl | |
89 | ----------------------- | |
90 | Template contains: | |
91 | 1. ->mode Mode: transport or tunnel | |
92 | 2. ->id.proto Protocol: AH/ESP/IPCOMP | |
93 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. | |
94 | Q: allow to resolve security gateway? | |
95 | 4. ->id.spi If not zero, static SPI. | |
96 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. | |
97 | 6. ->algos List of allowed algos. Plain bitmask now. | |
98 | Q: ealgos, aalgos, calgos. What a mess... | |
99 | 7. ->share Sharing mode. | |
100 | Q: how to implement private sharing mode? To add struct sock* to | |
101 | flow id? | |
102 | ||
103 | Having this template we search through SAD searching for entries | |
104 | with appropriate mode/proto/algo, permitted by selector. | |
105 | If no appropriate entry found, it is requested from key manager. | |
106 | ||
107 | PROBLEMS: | |
108 | Q: How to find all the bundles referring to a physical path for | |
109 | PMTU discovery? Seems, dst should contain list of all parents... | |
110 | and enter to infinite locking hierarchy disaster. | |
111 | No! It is easier, we will not search for them, let them find us. | |
112 | We add genid to each dst plus pointer to genid of raw IP route, | |
113 | pmtu disc will update pmtu on raw IP route and increase its genid. | |
114 | dst_check() will see this for top level and trigger resyncing | |
115 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. | |
116 | */ | |
117 | ||
12a169e7 HX |
118 | struct xfrm_state_walk { |
119 | struct list_head all; | |
120 | u8 state; | |
121 | union { | |
122 | u8 dying; | |
123 | u8 proto; | |
124 | }; | |
125 | u32 seq; | |
126 | }; | |
127 | ||
1da177e4 | 128 | /* Full description of state of transformer. */ |
fd2c3ef7 | 129 | struct xfrm_state { |
673c09be AD |
130 | #ifdef CONFIG_NET_NS |
131 | struct net *xs_net; | |
132 | #endif | |
abb81c4f | 133 | union { |
12a169e7 | 134 | struct hlist_node gclist; |
abb81c4f HX |
135 | struct hlist_node bydst; |
136 | }; | |
8f126e37 DM |
137 | struct hlist_node bysrc; |
138 | struct hlist_node byspi; | |
1da177e4 LT |
139 | |
140 | atomic_t refcnt; | |
141 | spinlock_t lock; | |
142 | ||
143 | struct xfrm_id id; | |
144 | struct xfrm_selector sel; | |
bf825f81 | 145 | struct xfrm_mark mark; |
35d2856b | 146 | u32 tfcpad; |
1da177e4 | 147 | |
9d4a706d DM |
148 | u32 genid; |
149 | ||
12a169e7 HX |
150 | /* Key manager bits */ |
151 | struct xfrm_state_walk km; | |
1da177e4 LT |
152 | |
153 | /* Parameters of this state. */ | |
154 | struct { | |
155 | u32 reqid; | |
156 | u8 mode; | |
157 | u8 replay_window; | |
158 | u8 aalgo, ealgo, calgo; | |
159 | u8 flags; | |
160 | u16 family; | |
161 | xfrm_address_t saddr; | |
162 | int header_len; | |
163 | int trailer_len; | |
164 | } props; | |
165 | ||
166 | struct xfrm_lifetime_cfg lft; | |
167 | ||
168 | /* Data for transformer */ | |
4447bb33 | 169 | struct xfrm_algo_auth *aalg; |
1da177e4 LT |
170 | struct xfrm_algo *ealg; |
171 | struct xfrm_algo *calg; | |
1a6509d9 | 172 | struct xfrm_algo_aead *aead; |
1da177e4 LT |
173 | |
174 | /* Data for encapsulator */ | |
175 | struct xfrm_encap_tmpl *encap; | |
176 | ||
060f02a3 NT |
177 | /* Data for care-of address */ |
178 | xfrm_address_t *coaddr; | |
179 | ||
1da177e4 LT |
180 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
181 | struct xfrm_state *tunnel; | |
182 | ||
183 | /* If a tunnel, number of users + 1 */ | |
184 | atomic_t tunnel_users; | |
185 | ||
186 | /* State for replay detection */ | |
187 | struct xfrm_replay_state replay; | |
188 | ||
f8cd5488 JHS |
189 | /* Replay detection state at the time we sent the last notification */ |
190 | struct xfrm_replay_state preplay; | |
191 | ||
2717096a JHS |
192 | /* internal flag that only holds state for delayed aevent at the |
193 | * moment | |
194 | */ | |
195 | u32 xflags; | |
196 | ||
f8cd5488 JHS |
197 | /* Replay detection notification settings */ |
198 | u32 replay_maxage; | |
199 | u32 replay_maxdiff; | |
200 | ||
201 | /* Replay detection notification timer */ | |
202 | struct timer_list rtimer; | |
203 | ||
1da177e4 LT |
204 | /* Statistics */ |
205 | struct xfrm_stats stats; | |
206 | ||
207 | struct xfrm_lifetime_cur curlft; | |
9e0d57fd | 208 | struct tasklet_hrtimer mtimer; |
1da177e4 | 209 | |
9afaca05 | 210 | /* Last used time */ |
d26f3984 | 211 | unsigned long lastused; |
9afaca05 | 212 | |
1da177e4 LT |
213 | /* Reference to data common to all the instances of this |
214 | * transformer. */ | |
533cb5b0 | 215 | const struct xfrm_type *type; |
13996378 | 216 | struct xfrm_mode *inner_mode; |
df9dcb45 | 217 | struct xfrm_mode *inner_mode_iaf; |
13996378 | 218 | struct xfrm_mode *outer_mode; |
1da177e4 | 219 | |
df71837d TJ |
220 | /* Security context */ |
221 | struct xfrm_sec_ctx *security; | |
222 | ||
1da177e4 LT |
223 | /* Private data of this transformer, format is opaque, |
224 | * interpreted by xfrm_type methods. */ | |
225 | void *data; | |
226 | }; | |
227 | ||
673c09be AD |
228 | static inline struct net *xs_net(struct xfrm_state *x) |
229 | { | |
230 | return read_pnet(&x->xs_net); | |
231 | } | |
232 | ||
2717096a JHS |
233 | /* xflags - make enum if more show up */ |
234 | #define XFRM_TIME_DEFER 1 | |
235 | ||
1da177e4 LT |
236 | enum { |
237 | XFRM_STATE_VOID, | |
238 | XFRM_STATE_ACQ, | |
239 | XFRM_STATE_VALID, | |
240 | XFRM_STATE_ERROR, | |
241 | XFRM_STATE_EXPIRED, | |
242 | XFRM_STATE_DEAD | |
243 | }; | |
244 | ||
26b15dad | 245 | /* callback structure passed from either netlink or pfkey */ |
fd2c3ef7 | 246 | struct km_event { |
bf08867f HX |
247 | union { |
248 | u32 hard; | |
249 | u32 proto; | |
250 | u32 byid; | |
f8cd5488 | 251 | u32 aevent; |
f7b6983f | 252 | u32 type; |
bf08867f HX |
253 | } data; |
254 | ||
26b15dad JHS |
255 | u32 seq; |
256 | u32 pid; | |
257 | u32 event; | |
7067802e | 258 | struct net *net; |
26b15dad JHS |
259 | }; |
260 | ||
25ee3286 | 261 | struct net_device; |
1da177e4 LT |
262 | struct xfrm_type; |
263 | struct xfrm_dst; | |
264 | struct xfrm_policy_afinfo { | |
265 | unsigned short family; | |
1da177e4 | 266 | struct dst_ops *dst_ops; |
ddcfd796 | 267 | void (*garbage_collect)(struct net *net); |
c5b3cf46 AD |
268 | struct dst_entry *(*dst_lookup)(struct net *net, int tos, |
269 | xfrm_address_t *saddr, | |
66cdb3ca | 270 | xfrm_address_t *daddr); |
fbda33b2 | 271 | int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr); |
1da177e4 | 272 | void (*decode_session)(struct sk_buff *skb, |
d5422efe HX |
273 | struct flowi *fl, |
274 | int reverse); | |
25ee3286 | 275 | int (*get_tos)(struct flowi *fl); |
a1b05140 MN |
276 | int (*init_path)(struct xfrm_dst *path, |
277 | struct dst_entry *dst, | |
278 | int nfheader_len); | |
25ee3286 | 279 | int (*fill_dst)(struct xfrm_dst *xdst, |
87c1e12b HX |
280 | struct net_device *dev, |
281 | struct flowi *fl); | |
1da177e4 LT |
282 | }; |
283 | ||
284 | extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); | |
285 | extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); | |
26b15dad JHS |
286 | extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); |
287 | extern void km_state_notify(struct xfrm_state *x, struct km_event *c); | |
1da177e4 LT |
288 | |
289 | struct xfrm_tmpl; | |
980ebd25 | 290 | extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
53bc6b4d JHS |
291 | extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); |
292 | extern int __xfrm_state_delete(struct xfrm_state *x); | |
293 | ||
1da177e4 | 294 | struct xfrm_state_afinfo { |
17c2a42a | 295 | unsigned int family; |
36cf9acf | 296 | unsigned int proto; |
8e3d716c | 297 | __be16 eth_proto; |
17c2a42a | 298 | struct module *owner; |
533cb5b0 | 299 | const struct xfrm_type *type_map[IPPROTO_MAX]; |
aa5d62cc | 300 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; |
d094cd83 | 301 | int (*init_flags)(struct xfrm_state *x); |
8444cf71 TE |
302 | void (*init_tempsel)(struct xfrm_selector *sel, struct flowi *fl); |
303 | void (*init_temprop)(struct xfrm_state *x, struct xfrm_tmpl *tmpl, | |
1da177e4 | 304 | xfrm_address_t *daddr, xfrm_address_t *saddr); |
41a49cc3 MN |
305 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
306 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); | |
cdca7265 | 307 | int (*output)(struct sk_buff *skb); |
227620e2 HX |
308 | int (*extract_input)(struct xfrm_state *x, |
309 | struct sk_buff *skb); | |
36cf9acf HX |
310 | int (*extract_output)(struct xfrm_state *x, |
311 | struct sk_buff *skb); | |
716062fd HX |
312 | int (*transport_finish)(struct sk_buff *skb, |
313 | int async); | |
1da177e4 LT |
314 | }; |
315 | ||
316 | extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); | |
317 | extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
318 | ||
319 | extern void xfrm_state_delete_tunnel(struct xfrm_state *x); | |
320 | ||
fd2c3ef7 | 321 | struct xfrm_type { |
1da177e4 LT |
322 | char *description; |
323 | struct module *owner; | |
a6337463 | 324 | u8 proto; |
325 | u8 flags; | |
1b5c2299 | 326 | #define XFRM_TYPE_NON_FRAGMENT 1 |
436a0a40 | 327 | #define XFRM_TYPE_REPLAY_PROT 2 |
f04e7e8d HX |
328 | #define XFRM_TYPE_LOCAL_COADDR 4 |
329 | #define XFRM_TYPE_REMOTE_COADDR 8 | |
1da177e4 | 330 | |
72cb6962 | 331 | int (*init_state)(struct xfrm_state *x); |
1da177e4 | 332 | void (*destructor)(struct xfrm_state *); |
e695633e | 333 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 334 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
df0ba92a | 335 | int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); |
aee5adb4 | 336 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
1da177e4 | 337 | /* Estimate maximal size of result of transformation of a dgram */ |
c5c25238 | 338 | u32 (*get_mtu)(struct xfrm_state *, int size); |
1da177e4 LT |
339 | }; |
340 | ||
533cb5b0 ED |
341 | extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
342 | extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); | |
1da177e4 | 343 | |
b59f45d0 | 344 | struct xfrm_mode { |
227620e2 HX |
345 | /* |
346 | * Remove encapsulation header. | |
347 | * | |
348 | * The IP header will be moved over the top of the encapsulation | |
349 | * header. | |
350 | * | |
351 | * On entry, the transport header shall point to where the IP header | |
352 | * should be and the network header shall be set to where the IP | |
353 | * header currently is. skb->data shall point to the start of the | |
354 | * payload. | |
355 | */ | |
356 | int (*input2)(struct xfrm_state *x, struct sk_buff *skb); | |
357 | ||
358 | /* | |
359 | * This is the actual input entry point. | |
360 | * | |
361 | * For transport mode and equivalent this would be identical to | |
362 | * input2 (which does not need to be set). While tunnel mode | |
363 | * and equivalent would set this to the tunnel encapsulation function | |
364 | * xfrm4_prepare_input that would in turn call input2. | |
365 | */ | |
b59f45d0 | 366 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); |
37fedd3a HX |
367 | |
368 | /* | |
369 | * Add encapsulation header. | |
370 | * | |
371 | * On exit, the transport header will be set to the start of the | |
372 | * encapsulation header to be filled in by x->type->output and | |
373 | * the mac header will be set to the nextheader (protocol for | |
374 | * IPv4) field of the extension header directly preceding the | |
375 | * encapsulation header, or in its absence, that of the top IP | |
376 | * header. The value of the network header will always point | |
377 | * to the top IP header while skb->data will point to the payload. | |
378 | */ | |
36cf9acf HX |
379 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); |
380 | ||
381 | /* | |
382 | * This is the actual output entry point. | |
383 | * | |
384 | * For transport mode and equivalent this would be identical to | |
385 | * output2 (which does not need to be set). While tunnel mode | |
386 | * and equivalent would set this to a tunnel encapsulation function | |
387 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn | |
388 | * call output2. | |
389 | */ | |
390 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); | |
b59f45d0 | 391 | |
17c2a42a | 392 | struct xfrm_state_afinfo *afinfo; |
b59f45d0 HX |
393 | struct module *owner; |
394 | unsigned int encap; | |
1bfcb10f HX |
395 | int flags; |
396 | }; | |
397 | ||
398 | /* Flags for xfrm_mode. */ | |
399 | enum { | |
400 | XFRM_MODE_FLAG_TUNNEL = 1, | |
b59f45d0 HX |
401 | }; |
402 | ||
403 | extern int xfrm_register_mode(struct xfrm_mode *mode, int family); | |
404 | extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); | |
b59f45d0 | 405 | |
df9dcb45 KM |
406 | static inline int xfrm_af2proto(unsigned int family) |
407 | { | |
408 | switch(family) { | |
409 | case AF_INET: | |
410 | return IPPROTO_IPIP; | |
411 | case AF_INET6: | |
412 | return IPPROTO_IPV6; | |
413 | default: | |
414 | return 0; | |
415 | } | |
416 | } | |
417 | ||
418 | static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) | |
419 | { | |
420 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || | |
421 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) | |
422 | return x->inner_mode; | |
423 | else | |
424 | return x->inner_mode_iaf; | |
425 | } | |
426 | ||
fd2c3ef7 | 427 | struct xfrm_tmpl { |
1da177e4 LT |
428 | /* id in template is interpreted as: |
429 | * daddr - destination of tunnel, may be zero for transport mode. | |
430 | * spi - zero to acquire spi. Not zero if spi is static, then | |
431 | * daddr must be fixed too. | |
432 | * proto - AH/ESP/IPCOMP | |
433 | */ | |
434 | struct xfrm_id id; | |
435 | ||
436 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
437 | xfrm_address_t saddr; | |
438 | ||
76b3f055 MK |
439 | unsigned short encap_family; |
440 | ||
a6337463 | 441 | u32 reqid; |
1da177e4 | 442 | |
7e49e6de | 443 | /* Mode: transport, tunnel etc. */ |
a6337463 | 444 | u8 mode; |
1da177e4 LT |
445 | |
446 | /* Sharing mode: unique, this session only, this user only etc. */ | |
a6337463 | 447 | u8 share; |
1da177e4 LT |
448 | |
449 | /* May skip this transfomration if no SA is found */ | |
a6337463 | 450 | u8 optional; |
1da177e4 | 451 | |
c5d18e98 | 452 | /* Skip aalgos/ealgos/calgos checks. */ |
a6337463 | 453 | u8 allalgs; |
c5d18e98 | 454 | |
1da177e4 | 455 | /* Bit mask of algos allowed for acquisition */ |
a6337463 | 456 | u32 aalgos; |
457 | u32 ealgos; | |
458 | u32 calgos; | |
1da177e4 LT |
459 | }; |
460 | ||
622dc828 | 461 | #define XFRM_MAX_DEPTH 6 |
1da177e4 | 462 | |
12a169e7 HX |
463 | struct xfrm_policy_walk_entry { |
464 | struct list_head all; | |
465 | u8 dead; | |
466 | }; | |
467 | ||
468 | struct xfrm_policy_walk { | |
469 | struct xfrm_policy_walk_entry walk; | |
470 | u8 type; | |
471 | u32 seq; | |
472 | }; | |
473 | ||
fd2c3ef7 | 474 | struct xfrm_policy { |
0331b1f3 AD |
475 | #ifdef CONFIG_NET_NS |
476 | struct net *xp_net; | |
477 | #endif | |
2518c7c2 DM |
478 | struct hlist_node bydst; |
479 | struct hlist_node byidx; | |
1da177e4 LT |
480 | |
481 | /* This lock only affects elements except for entry. */ | |
482 | rwlock_t lock; | |
483 | atomic_t refcnt; | |
484 | struct timer_list timer; | |
485 | ||
fe1a5f03 | 486 | struct flow_cache_object flo; |
80c802f3 | 487 | atomic_t genid; |
1da177e4 LT |
488 | u32 priority; |
489 | u32 index; | |
bf825f81 | 490 | struct xfrm_mark mark; |
1da177e4 LT |
491 | struct xfrm_selector selector; |
492 | struct xfrm_lifetime_cfg lft; | |
493 | struct xfrm_lifetime_cur curlft; | |
12a169e7 | 494 | struct xfrm_policy_walk_entry walk; |
46ca5f5d ACM |
495 | u8 type; |
496 | u8 action; | |
497 | u8 flags; | |
46ca5f5d | 498 | u8 xfrm_nr; |
12a169e7 | 499 | u16 family; |
df71837d | 500 | struct xfrm_sec_ctx *security; |
1da177e4 LT |
501 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
502 | }; | |
503 | ||
0331b1f3 AD |
504 | static inline struct net *xp_net(struct xfrm_policy *xp) |
505 | { | |
506 | return read_pnet(&xp->xp_net); | |
507 | } | |
508 | ||
13c1d189 AE |
509 | struct xfrm_kmaddress { |
510 | xfrm_address_t local; | |
511 | xfrm_address_t remote; | |
512 | u32 reserved; | |
513 | u16 family; | |
514 | }; | |
515 | ||
80c9abaa SS |
516 | struct xfrm_migrate { |
517 | xfrm_address_t old_daddr; | |
518 | xfrm_address_t old_saddr; | |
519 | xfrm_address_t new_daddr; | |
520 | xfrm_address_t new_saddr; | |
521 | u8 proto; | |
522 | u8 mode; | |
523 | u16 reserved; | |
524 | u32 reqid; | |
525 | u16 old_family; | |
526 | u16 new_family; | |
527 | }; | |
528 | ||
f8cd5488 JHS |
529 | #define XFRM_KM_TIMEOUT 30 |
530 | /* which seqno */ | |
531 | #define XFRM_REPLAY_SEQ 1 | |
532 | #define XFRM_REPLAY_OSEQ 2 | |
533 | #define XFRM_REPLAY_SEQ_MASK 3 | |
534 | /* what happened */ | |
535 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
536 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
537 | ||
538 | /* default aevent timeout in units of 100ms */ | |
539 | #define XFRM_AE_ETIME 10 | |
540 | /* Async Event timer multiplier */ | |
541 | #define XFRM_AE_ETH_M 10 | |
542 | /* default seq threshold size */ | |
543 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 | 544 | |
fd2c3ef7 | 545 | struct xfrm_mgr { |
1da177e4 LT |
546 | struct list_head list; |
547 | char *id; | |
26b15dad | 548 | int (*notify)(struct xfrm_state *x, struct km_event *c); |
1da177e4 | 549 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); |
cb969f07 | 550 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 551 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
26b15dad | 552 | int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); |
db983c11 | 553 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
13c1d189 | 554 | int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles, struct xfrm_kmaddress *k); |
1da177e4 LT |
555 | }; |
556 | ||
557 | extern int xfrm_register_km(struct xfrm_mgr *km); | |
558 | extern int xfrm_unregister_km(struct xfrm_mgr *km); | |
559 | ||
436a0a40 HX |
560 | /* |
561 | * This structure is used for the duration where packets are being | |
562 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
563 | * area beyond the generic IP part may be overwritten. | |
564 | */ | |
565 | struct xfrm_skb_cb { | |
566 | union { | |
567 | struct inet_skb_parm h4; | |
568 | struct inet6_skb_parm h6; | |
569 | } header; | |
570 | ||
571 | /* Sequence number for replay protection. */ | |
b318e0e4 HX |
572 | union { |
573 | u64 output; | |
574 | __be32 input; | |
575 | } seq; | |
436a0a40 HX |
576 | }; |
577 | ||
578 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
579 | ||
36cf9acf HX |
580 | /* |
581 | * This structure is used by the afinfo prepare_input/prepare_output functions | |
582 | * to transmit header information to the mode input/output functions. | |
583 | */ | |
584 | struct xfrm_mode_skb_cb { | |
585 | union { | |
586 | struct inet_skb_parm h4; | |
587 | struct inet6_skb_parm h6; | |
588 | } header; | |
589 | ||
590 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
591 | __be16 id; | |
592 | __be16 frag_off; | |
593 | ||
732c8bd5 HX |
594 | /* IP header length (excluding options or extension headers). */ |
595 | u8 ihl; | |
596 | ||
36cf9acf HX |
597 | /* TOS for IPv4, class for IPv6. */ |
598 | u8 tos; | |
599 | ||
600 | /* TTL for IPv4, hop limitfor IPv6. */ | |
601 | u8 ttl; | |
602 | ||
603 | /* Protocol for IPv4, NH for IPv6. */ | |
604 | u8 protocol; | |
605 | ||
732c8bd5 HX |
606 | /* Option length for IPv4, zero for IPv6. */ |
607 | u8 optlen; | |
608 | ||
36cf9acf HX |
609 | /* Used by IPv6 only, zero for IPv4. */ |
610 | u8 flow_lbl[3]; | |
611 | }; | |
612 | ||
613 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
614 | ||
716062fd HX |
615 | /* |
616 | * This structure is used by the input processing to locate the SPI and | |
617 | * related information. | |
618 | */ | |
619 | struct xfrm_spi_skb_cb { | |
620 | union { | |
621 | struct inet_skb_parm h4; | |
622 | struct inet6_skb_parm h6; | |
623 | } header; | |
624 | ||
716062fd | 625 | unsigned int daddroff; |
2fcb45b6 | 626 | unsigned int family; |
716062fd HX |
627 | }; |
628 | ||
629 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) | |
630 | ||
161a09e7 | 631 | /* Audit Information */ |
fd2c3ef7 | 632 | struct xfrm_audit { |
161a09e7 | 633 | u32 secid; |
2532386f EP |
634 | uid_t loginuid; |
635 | u32 sessionid; | |
161a09e7 | 636 | }; |
c9204d9c JL |
637 | |
638 | #ifdef CONFIG_AUDITSYSCALL | |
afeb14b4 | 639 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
ab5f5e8b JL |
640 | { |
641 | struct audit_buffer *audit_buf = NULL; | |
ab5f5e8b | 642 | |
afeb14b4 PM |
643 | if (audit_enabled == 0) |
644 | return NULL; | |
ab5f5e8b | 645 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, |
afeb14b4 | 646 | AUDIT_MAC_IPSEC_EVENT); |
ab5f5e8b JL |
647 | if (audit_buf == NULL) |
648 | return NULL; | |
afeb14b4 PM |
649 | audit_log_format(audit_buf, "op=%s", op); |
650 | return audit_buf; | |
651 | } | |
ab5f5e8b | 652 | |
2532386f | 653 | static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid, |
afeb14b4 PM |
654 | struct audit_buffer *audit_buf) |
655 | { | |
656 | char *secctx; | |
657 | u32 secctx_len; | |
ab5f5e8b | 658 | |
2532386f | 659 | audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); |
68277acc PM |
660 | if (secid != 0 && |
661 | security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { | |
ab5f5e8b JL |
662 | audit_log_format(audit_buf, " subj=%s", secctx); |
663 | security_release_secctx(secctx, secctx_len); | |
664 | } else | |
665 | audit_log_task_context(audit_buf); | |
ab5f5e8b JL |
666 | } |
667 | ||
668 | extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
2532386f | 669 | u32 auid, u32 ses, u32 secid); |
ab5f5e8b | 670 | extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
2532386f | 671 | u32 auid, u32 ses, u32 secid); |
ab5f5e8b | 672 | extern void xfrm_audit_state_add(struct xfrm_state *x, int result, |
2532386f | 673 | u32 auid, u32 ses, u32 secid); |
ab5f5e8b | 674 | extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
2532386f | 675 | u32 auid, u32 ses, u32 secid); |
afeb14b4 PM |
676 | extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
677 | struct sk_buff *skb); | |
678 | extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); | |
679 | extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
680 | __be32 net_spi, __be32 net_seq); | |
681 | extern void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
682 | struct sk_buff *skb, u8 proto); | |
c9204d9c | 683 | #else |
41fef0ee MS |
684 | |
685 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
686 | u32 auid, u32 ses, u32 secid) | |
687 | { | |
688 | } | |
689 | ||
690 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
691 | u32 auid, u32 ses, u32 secid) | |
692 | { | |
693 | } | |
694 | ||
695 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
696 | u32 auid, u32 ses, u32 secid) | |
697 | { | |
698 | } | |
699 | ||
700 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
701 | u32 auid, u32 ses, u32 secid) | |
702 | { | |
703 | } | |
704 | ||
705 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
706 | struct sk_buff *skb) | |
707 | { | |
708 | } | |
709 | ||
710 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, | |
711 | u16 family) | |
712 | { | |
713 | } | |
714 | ||
715 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
716 | __be32 net_spi, __be32 net_seq) | |
717 | { | |
718 | } | |
719 | ||
720 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
721 | struct sk_buff *skb, u8 proto) | |
722 | { | |
723 | } | |
c9204d9c | 724 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 725 | |
1da177e4 LT |
726 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
727 | { | |
728 | if (likely(policy != NULL)) | |
729 | atomic_inc(&policy->refcnt); | |
730 | } | |
731 | ||
64c31b3f | 732 | extern void xfrm_policy_destroy(struct xfrm_policy *policy); |
1da177e4 LT |
733 | |
734 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
735 | { | |
736 | if (atomic_dec_and_test(&policy->refcnt)) | |
64c31b3f | 737 | xfrm_policy_destroy(policy); |
1da177e4 LT |
738 | } |
739 | ||
4e81bb83 MN |
740 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
741 | { | |
742 | int i; | |
743 | for (i = npols - 1; i >= 0; --i) | |
744 | xfrm_pol_put(pols[i]); | |
745 | } | |
4e81bb83 | 746 | |
1da177e4 LT |
747 | extern void __xfrm_state_destroy(struct xfrm_state *); |
748 | ||
21380b81 HX |
749 | static inline void __xfrm_state_put(struct xfrm_state *x) |
750 | { | |
751 | atomic_dec(&x->refcnt); | |
752 | } | |
753 | ||
1da177e4 LT |
754 | static inline void xfrm_state_put(struct xfrm_state *x) |
755 | { | |
756 | if (atomic_dec_and_test(&x->refcnt)) | |
757 | __xfrm_state_destroy(x); | |
758 | } | |
759 | ||
760 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
761 | { | |
762 | atomic_inc(&x->refcnt); | |
763 | } | |
764 | ||
765 | static __inline__ int addr_match(void *token1, void *token2, int prefixlen) | |
766 | { | |
5f19343f AV |
767 | __be32 *a1 = token1; |
768 | __be32 *a2 = token2; | |
1da177e4 LT |
769 | int pdw; |
770 | int pbi; | |
771 | ||
a6337463 | 772 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
1da177e4 LT |
773 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
774 | ||
775 | if (pdw) | |
776 | if (memcmp(a1, a2, pdw << 2)) | |
777 | return 0; | |
778 | ||
779 | if (pbi) { | |
5f19343f | 780 | __be32 mask; |
1da177e4 LT |
781 | |
782 | mask = htonl((0xffffffff) << (32 - pbi)); | |
783 | ||
784 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
785 | return 0; | |
786 | } | |
787 | ||
788 | return 1; | |
789 | } | |
790 | ||
791 | static __inline__ | |
f9d07e41 | 792 | __be16 xfrm_flowi_sport(struct flowi *fl) |
1da177e4 | 793 | { |
f9d07e41 | 794 | __be16 port; |
1da177e4 LT |
795 | switch(fl->proto) { |
796 | case IPPROTO_TCP: | |
797 | case IPPROTO_UDP: | |
ba4e58ec | 798 | case IPPROTO_UDPLITE: |
1da177e4 LT |
799 | case IPPROTO_SCTP: |
800 | port = fl->fl_ip_sport; | |
801 | break; | |
802 | case IPPROTO_ICMP: | |
803 | case IPPROTO_ICMPV6: | |
804 | port = htons(fl->fl_icmp_type); | |
805 | break; | |
2ce4272a MN |
806 | case IPPROTO_MH: |
807 | port = htons(fl->fl_mh_type); | |
808 | break; | |
cc9ff19d | 809 | case IPPROTO_GRE: |
aa285b17 | 810 | port = htons(ntohl(fl->fl_gre_key) >> 16); |
cc9ff19d | 811 | break; |
1da177e4 LT |
812 | default: |
813 | port = 0; /*XXX*/ | |
814 | } | |
815 | return port; | |
816 | } | |
817 | ||
818 | static __inline__ | |
f9d07e41 | 819 | __be16 xfrm_flowi_dport(struct flowi *fl) |
1da177e4 | 820 | { |
f9d07e41 | 821 | __be16 port; |
1da177e4 LT |
822 | switch(fl->proto) { |
823 | case IPPROTO_TCP: | |
824 | case IPPROTO_UDP: | |
ba4e58ec | 825 | case IPPROTO_UDPLITE: |
1da177e4 LT |
826 | case IPPROTO_SCTP: |
827 | port = fl->fl_ip_dport; | |
828 | break; | |
829 | case IPPROTO_ICMP: | |
830 | case IPPROTO_ICMPV6: | |
831 | port = htons(fl->fl_icmp_code); | |
832 | break; | |
cc9ff19d | 833 | case IPPROTO_GRE: |
aa285b17 | 834 | port = htons(ntohl(fl->fl_gre_key) & 0xffff); |
cc9ff19d | 835 | break; |
1da177e4 LT |
836 | default: |
837 | port = 0; /*XXX*/ | |
838 | } | |
839 | return port; | |
840 | } | |
841 | ||
77681021 AM |
842 | extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, |
843 | unsigned short family); | |
1da177e4 | 844 | |
df71837d TJ |
845 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
846 | /* If neither has a context --> match | |
847 | * Otherwise, both must have a context and the sids, doi, alg must match | |
848 | */ | |
849 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
850 | { | |
851 | return ((!s1 && !s2) || | |
852 | (s1 && s2 && | |
853 | (s1->ctx_sid == s2->ctx_sid) && | |
854 | (s1->ctx_doi == s2->ctx_doi) && | |
855 | (s1->ctx_alg == s2->ctx_alg))); | |
856 | } | |
857 | #else | |
858 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
859 | { | |
860 | return 1; | |
861 | } | |
862 | #endif | |
863 | ||
1da177e4 LT |
864 | /* A struct encoding bundle of transformations to apply to some set of flow. |
865 | * | |
866 | * dst->child points to the next element of bundle. | |
867 | * dst->xfrm points to an instanse of transformer. | |
868 | * | |
869 | * Due to unfortunate limitations of current routing cache, which we | |
870 | * have no time to fix, it mirrors struct rtable and bound to the same | |
871 | * routing key, including saddr,daddr. However, we can have many of | |
872 | * bundles differing by session id. All the bundles grow from a parent | |
873 | * policy rule. | |
874 | */ | |
fd2c3ef7 | 875 | struct xfrm_dst { |
1da177e4 | 876 | union { |
1da177e4 LT |
877 | struct dst_entry dst; |
878 | struct rtable rt; | |
879 | struct rt6_info rt6; | |
880 | } u; | |
881 | struct dst_entry *route; | |
80c802f3 TT |
882 | struct flow_cache_object flo; |
883 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; | |
884 | int num_pols, num_xfrms; | |
157bfc25 MN |
885 | #ifdef CONFIG_XFRM_SUB_POLICY |
886 | struct flowi *origin; | |
887 | struct xfrm_selector *partner; | |
888 | #endif | |
80c802f3 TT |
889 | u32 xfrm_genid; |
890 | u32 policy_genid; | |
1da177e4 LT |
891 | u32 route_mtu_cached; |
892 | u32 child_mtu_cached; | |
92d63dec HY |
893 | u32 route_cookie; |
894 | u32 path_cookie; | |
1da177e4 LT |
895 | }; |
896 | ||
def8b4fa | 897 | #ifdef CONFIG_XFRM |
aabc9761 HX |
898 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
899 | { | |
80c802f3 | 900 | xfrm_pols_put(xdst->pols, xdst->num_pols); |
aabc9761 HX |
901 | dst_release(xdst->route); |
902 | if (likely(xdst->u.dst.xfrm)) | |
903 | xfrm_state_put(xdst->u.dst.xfrm); | |
157bfc25 MN |
904 | #ifdef CONFIG_XFRM_SUB_POLICY |
905 | kfree(xdst->origin); | |
906 | xdst->origin = NULL; | |
907 | kfree(xdst->partner); | |
908 | xdst->partner = NULL; | |
909 | #endif | |
aabc9761 | 910 | } |
def8b4fa | 911 | #endif |
aabc9761 HX |
912 | |
913 | extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); | |
914 | ||
fd2c3ef7 | 915 | struct sec_path { |
1da177e4 LT |
916 | atomic_t refcnt; |
917 | int len; | |
dbe5b4aa | 918 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
1da177e4 LT |
919 | }; |
920 | ||
921 | static inline struct sec_path * | |
922 | secpath_get(struct sec_path *sp) | |
923 | { | |
924 | if (sp) | |
925 | atomic_inc(&sp->refcnt); | |
926 | return sp; | |
927 | } | |
928 | ||
929 | extern void __secpath_destroy(struct sec_path *sp); | |
930 | ||
931 | static inline void | |
932 | secpath_put(struct sec_path *sp) | |
933 | { | |
934 | if (sp && atomic_dec_and_test(&sp->refcnt)) | |
935 | __secpath_destroy(sp); | |
936 | } | |
937 | ||
938 | extern struct sec_path *secpath_dup(struct sec_path *src); | |
939 | ||
940 | static inline void | |
941 | secpath_reset(struct sk_buff *skb) | |
942 | { | |
943 | #ifdef CONFIG_XFRM | |
944 | secpath_put(skb->sp); | |
945 | skb->sp = NULL; | |
946 | #endif | |
947 | } | |
948 | ||
a1e59abf PM |
949 | static inline int |
950 | xfrm_addr_any(xfrm_address_t *addr, unsigned short family) | |
951 | { | |
952 | switch (family) { | |
953 | case AF_INET: | |
954 | return addr->a4 == 0; | |
955 | case AF_INET6: | |
956 | return ipv6_addr_any((struct in6_addr *)&addr->a6); | |
957 | } | |
958 | return 0; | |
959 | } | |
960 | ||
1da177e4 LT |
961 | static inline int |
962 | __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) | |
963 | { | |
964 | return (tmpl->saddr.a4 && | |
965 | tmpl->saddr.a4 != x->props.saddr.a4); | |
966 | } | |
967 | ||
968 | static inline int | |
969 | __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) | |
970 | { | |
971 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
972 | ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); | |
973 | } | |
974 | ||
975 | static inline int | |
976 | xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) | |
977 | { | |
978 | switch (family) { | |
979 | case AF_INET: | |
980 | return __xfrm4_state_addr_cmp(tmpl, x); | |
981 | case AF_INET6: | |
982 | return __xfrm6_state_addr_cmp(tmpl, x); | |
983 | } | |
984 | return !0; | |
985 | } | |
986 | ||
987 | #ifdef CONFIG_XFRM | |
1da177e4 LT |
988 | extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); |
989 | ||
d5422efe HX |
990 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
991 | struct sk_buff *skb, | |
992 | unsigned int family, int reverse) | |
1da177e4 | 993 | { |
f6e1e25d | 994 | struct net *net = dev_net(skb->dev); |
d5422efe HX |
995 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
996 | ||
1da177e4 | 997 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
d5422efe | 998 | return __xfrm_policy_check(sk, ndir, skb, family); |
4e81bb83 | 999 | |
f6e1e25d | 1000 | return (!net->xfrm.policy_count[dir] && !skb->sp) || |
adf30907 | 1001 | (skb_dst(skb)->flags & DST_NOPOLICY) || |
d5422efe HX |
1002 | __xfrm_policy_check(sk, ndir, skb, family); |
1003 | } | |
1004 | ||
1005 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1006 | { | |
1007 | return __xfrm_policy_check2(sk, dir, skb, family, 0); | |
1da177e4 LT |
1008 | } |
1009 | ||
1010 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1011 | { | |
1012 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
1013 | } | |
1014 | ||
1015 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1016 | { | |
1017 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
1018 | } | |
1019 | ||
d5422efe HX |
1020 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1021 | struct sk_buff *skb) | |
1022 | { | |
1023 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); | |
1024 | } | |
1025 | ||
1026 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1027 | struct sk_buff *skb) | |
1028 | { | |
1029 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); | |
1030 | } | |
1031 | ||
1032 | extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1033 | unsigned int family, int reverse); | |
1034 | ||
1035 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1036 | unsigned int family) | |
1037 | { | |
1038 | return __xfrm_decode_session(skb, fl, family, 0); | |
1039 | } | |
1040 | ||
1041 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, | |
1042 | struct flowi *fl, | |
1043 | unsigned int family) | |
1044 | { | |
1045 | return __xfrm_decode_session(skb, fl, family, 1); | |
1046 | } | |
1047 | ||
1da177e4 LT |
1048 | extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
1049 | ||
1050 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
1051 | { | |
99a66657 AD |
1052 | struct net *net = dev_net(skb->dev); |
1053 | ||
1054 | return !net->xfrm.policy_count[XFRM_POLICY_OUT] || | |
adf30907 | 1055 | (skb_dst(skb)->flags & DST_NOXFRM) || |
1da177e4 LT |
1056 | __xfrm_route_forward(skb, family); |
1057 | } | |
1058 | ||
1059 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
1060 | { | |
1061 | return xfrm_route_forward(skb, AF_INET); | |
1062 | } | |
1063 | ||
1064 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
1065 | { | |
1066 | return xfrm_route_forward(skb, AF_INET6); | |
1067 | } | |
1068 | ||
1069 | extern int __xfrm_sk_clone_policy(struct sock *sk); | |
1070 | ||
1071 | static inline int xfrm_sk_clone_policy(struct sock *sk) | |
1072 | { | |
1073 | if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) | |
1074 | return __xfrm_sk_clone_policy(sk); | |
1075 | return 0; | |
1076 | } | |
1077 | ||
4666faab | 1078 | extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
1079 | |
1080 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
1081 | { | |
1082 | if (unlikely(sk->sk_policy[0] != NULL)) { | |
1083 | xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); | |
1084 | sk->sk_policy[0] = NULL; | |
1085 | } | |
1086 | if (unlikely(sk->sk_policy[1] != NULL)) { | |
1087 | xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); | |
1088 | sk->sk_policy[1] = NULL; | |
1089 | } | |
1090 | } | |
1091 | ||
1092 | #else | |
1093 | ||
1094 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
1095 | static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } | |
1096 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } | |
1097 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
1098 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1099 | { | |
1100 | return 1; | |
1101 | } | |
1102 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1103 | { | |
1104 | return 1; | |
1105 | } | |
1106 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1107 | { | |
1108 | return 1; | |
1109 | } | |
d5422efe HX |
1110 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
1111 | struct flowi *fl, | |
1112 | unsigned int family) | |
1113 | { | |
1114 | return -ENOSYS; | |
1115 | } | |
1116 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, | |
1117 | struct sk_buff *skb) | |
1118 | { | |
1119 | return 1; | |
1120 | } | |
1121 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1122 | struct sk_buff *skb) | |
1123 | { | |
1124 | return 1; | |
1125 | } | |
1da177e4 LT |
1126 | #endif |
1127 | ||
1128 | static __inline__ | |
1129 | xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) | |
1130 | { | |
1131 | switch (family){ | |
1132 | case AF_INET: | |
1133 | return (xfrm_address_t *)&fl->fl4_dst; | |
1134 | case AF_INET6: | |
1135 | return (xfrm_address_t *)&fl->fl6_dst; | |
1136 | } | |
1137 | return NULL; | |
1138 | } | |
1139 | ||
1140 | static __inline__ | |
1141 | xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) | |
1142 | { | |
1143 | switch (family){ | |
1144 | case AF_INET: | |
1145 | return (xfrm_address_t *)&fl->fl4_src; | |
1146 | case AF_INET6: | |
1147 | return (xfrm_address_t *)&fl->fl6_src; | |
1148 | } | |
1149 | return NULL; | |
1150 | } | |
1151 | ||
9bb182a7 YH |
1152 | static __inline__ |
1153 | void xfrm_flowi_addr_get(struct flowi *fl, | |
1154 | xfrm_address_t *saddr, xfrm_address_t *daddr, | |
1155 | unsigned short family) | |
1156 | { | |
1157 | switch(family) { | |
1158 | case AF_INET: | |
1159 | memcpy(&saddr->a4, &fl->fl4_src, sizeof(saddr->a4)); | |
1160 | memcpy(&daddr->a4, &fl->fl4_dst, sizeof(daddr->a4)); | |
1161 | break; | |
1162 | case AF_INET6: | |
1163 | ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->fl6_src); | |
1164 | ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->fl6_dst); | |
1165 | break; | |
1166 | } | |
1167 | } | |
1168 | ||
1da177e4 LT |
1169 | static __inline__ int |
1170 | __xfrm4_state_addr_check(struct xfrm_state *x, | |
1171 | xfrm_address_t *daddr, xfrm_address_t *saddr) | |
1172 | { | |
1173 | if (daddr->a4 == x->id.daddr.a4 && | |
1174 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
1175 | return 1; | |
1176 | return 0; | |
1177 | } | |
1178 | ||
1179 | static __inline__ int | |
1180 | __xfrm6_state_addr_check(struct xfrm_state *x, | |
1181 | xfrm_address_t *daddr, xfrm_address_t *saddr) | |
1182 | { | |
1183 | if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && | |
1184 | (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| | |
1185 | ipv6_addr_any((struct in6_addr *)saddr) || | |
1186 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) | |
1187 | return 1; | |
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | static __inline__ int | |
1192 | xfrm_state_addr_check(struct xfrm_state *x, | |
1193 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
1194 | unsigned short family) | |
1195 | { | |
1196 | switch (family) { | |
1197 | case AF_INET: | |
1198 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
1199 | case AF_INET6: | |
1200 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
1201 | } | |
1202 | return 0; | |
1203 | } | |
1204 | ||
e53820de MN |
1205 | static __inline__ int |
1206 | xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, | |
1207 | unsigned short family) | |
1208 | { | |
1209 | switch (family) { | |
1210 | case AF_INET: | |
1211 | return __xfrm4_state_addr_check(x, | |
1212 | (xfrm_address_t *)&fl->fl4_dst, | |
1213 | (xfrm_address_t *)&fl->fl4_src); | |
1214 | case AF_INET6: | |
1215 | return __xfrm6_state_addr_check(x, | |
1216 | (xfrm_address_t *)&fl->fl6_dst, | |
1217 | (xfrm_address_t *)&fl->fl6_src); | |
1218 | } | |
1219 | return 0; | |
1220 | } | |
1221 | ||
1da177e4 LT |
1222 | static inline int xfrm_state_kern(struct xfrm_state *x) |
1223 | { | |
1224 | return atomic_read(&x->tunnel_users); | |
1225 | } | |
1226 | ||
5794708f MN |
1227 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1228 | { | |
dc00a525 MN |
1229 | return (!userproto || proto == userproto || |
1230 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
1231 | proto == IPPROTO_ESP || | |
1232 | proto == IPPROTO_COMP))); | |
5794708f MN |
1233 | } |
1234 | ||
1da177e4 LT |
1235 | /* |
1236 | * xfrm algorithm information | |
1237 | */ | |
1a6509d9 HX |
1238 | struct xfrm_algo_aead_info { |
1239 | u16 icv_truncbits; | |
1240 | }; | |
1241 | ||
1da177e4 LT |
1242 | struct xfrm_algo_auth_info { |
1243 | u16 icv_truncbits; | |
1244 | u16 icv_fullbits; | |
1245 | }; | |
1246 | ||
1247 | struct xfrm_algo_encr_info { | |
1248 | u16 blockbits; | |
1249 | u16 defkeybits; | |
1250 | }; | |
1251 | ||
1252 | struct xfrm_algo_comp_info { | |
1253 | u16 threshold; | |
1254 | }; | |
1255 | ||
1256 | struct xfrm_algo_desc { | |
1257 | char *name; | |
04ff1260 | 1258 | char *compat; |
1da177e4 LT |
1259 | u8 available:1; |
1260 | union { | |
1a6509d9 | 1261 | struct xfrm_algo_aead_info aead; |
1da177e4 LT |
1262 | struct xfrm_algo_auth_info auth; |
1263 | struct xfrm_algo_encr_info encr; | |
1264 | struct xfrm_algo_comp_info comp; | |
1265 | } uinfo; | |
1266 | struct sadb_alg desc; | |
1267 | }; | |
1268 | ||
1269 | /* XFRM tunnel handlers. */ | |
1270 | struct xfrm_tunnel { | |
1271 | int (*handler)(struct sk_buff *skb); | |
a6337463 | 1272 | int (*err_handler)(struct sk_buff *skb, u32 info); |
d2acc347 | 1273 | |
b33eab08 | 1274 | struct xfrm_tunnel __rcu *next; |
d2acc347 | 1275 | int priority; |
1da177e4 LT |
1276 | }; |
1277 | ||
1278 | struct xfrm6_tunnel { | |
d2acc347 HX |
1279 | int (*handler)(struct sk_buff *skb); |
1280 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
d5fdd6ba | 1281 | u8 type, u8 code, int offset, __be32 info); |
6f0bcf15 | 1282 | struct xfrm6_tunnel __rcu *next; |
d2acc347 | 1283 | int priority; |
1da177e4 LT |
1284 | }; |
1285 | ||
1286 | extern void xfrm_init(void); | |
a33bc5c1 | 1287 | extern void xfrm4_init(int rt_hash_size); |
d62ddc21 AD |
1288 | extern int xfrm_state_init(struct net *net); |
1289 | extern void xfrm_state_fini(struct net *net); | |
1da177e4 | 1290 | extern void xfrm4_state_init(void); |
c35b7e72 DL |
1291 | #ifdef CONFIG_XFRM |
1292 | extern int xfrm6_init(void); | |
1293 | extern void xfrm6_fini(void); | |
0013caba | 1294 | extern int xfrm6_state_init(void); |
1da177e4 | 1295 | extern void xfrm6_state_fini(void); |
c35b7e72 DL |
1296 | #else |
1297 | static inline int xfrm6_init(void) | |
1298 | { | |
1299 | return 0; | |
1300 | } | |
1301 | static inline void xfrm6_fini(void) | |
1302 | { | |
1303 | ; | |
1304 | } | |
1305 | #endif | |
1da177e4 | 1306 | |
558f82ef | 1307 | #ifdef CONFIG_XFRM_STATISTICS |
c68cd1a0 AD |
1308 | extern int xfrm_proc_init(struct net *net); |
1309 | extern void xfrm_proc_fini(struct net *net); | |
558f82ef MN |
1310 | #endif |
1311 | ||
b27aeadb AD |
1312 | extern int xfrm_sysctl_init(struct net *net); |
1313 | #ifdef CONFIG_SYSCTL | |
1314 | extern void xfrm_sysctl_fini(struct net *net); | |
1315 | #else | |
1316 | static inline void xfrm_sysctl_fini(struct net *net) | |
1317 | { | |
1318 | } | |
1319 | #endif | |
1320 | ||
5c182458 | 1321 | extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); |
284fa7da | 1322 | extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
4c563f76 | 1323 | int (*func)(struct xfrm_state *, int, void*), void *); |
abb81c4f | 1324 | extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); |
673c09be | 1325 | extern struct xfrm_state *xfrm_state_alloc(struct net *net); |
1da177e4 LT |
1326 | extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, |
1327 | struct flowi *fl, struct xfrm_tmpl *tmpl, | |
1328 | struct xfrm_policy *pol, int *err, | |
1329 | unsigned short family); | |
bd55775c | 1330 | extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, |
5447c5e4 | 1331 | xfrm_address_t *daddr, |
628529b6 JHS |
1332 | xfrm_address_t *saddr, |
1333 | unsigned short family, | |
1334 | u8 mode, u8 proto, u32 reqid); | |
1da177e4 LT |
1335 | extern int xfrm_state_check_expire(struct xfrm_state *x); |
1336 | extern void xfrm_state_insert(struct xfrm_state *x); | |
1337 | extern int xfrm_state_add(struct xfrm_state *x); | |
1338 | extern int xfrm_state_update(struct xfrm_state *x); | |
bd55775c JHS |
1339 | extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, |
1340 | xfrm_address_t *daddr, __be32 spi, | |
1341 | u8 proto, unsigned short family); | |
1342 | extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, | |
1343 | xfrm_address_t *daddr, | |
1344 | xfrm_address_t *saddr, | |
1345 | u8 proto, | |
1346 | unsigned short family); | |
41a49cc3 MN |
1347 | #ifdef CONFIG_XFRM_SUB_POLICY |
1348 | extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
1349 | int n, unsigned short family); | |
1350 | extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1351 | int n, unsigned short family); | |
1352 | #else | |
1353 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
1354 | int n, unsigned short family) | |
1355 | { | |
1356 | return -ENOSYS; | |
1357 | } | |
1358 | ||
1359 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1360 | int n, unsigned short family) | |
1361 | { | |
1362 | return -ENOSYS; | |
1363 | } | |
1364 | #endif | |
af11e316 JHS |
1365 | |
1366 | struct xfrmk_sadinfo { | |
1367 | u32 sadhcnt; /* current hash bkts */ | |
1368 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1369 | u32 sadcnt; /* current running count */ | |
1370 | }; | |
1371 | ||
5a6d3416 JHS |
1372 | struct xfrmk_spdinfo { |
1373 | u32 incnt; | |
1374 | u32 outcnt; | |
1375 | u32 fwdcnt; | |
1376 | u32 inscnt; | |
1377 | u32 outscnt; | |
1378 | u32 fwdscnt; | |
1379 | u32 spdhcnt; | |
1380 | u32 spdhmcnt; | |
1381 | }; | |
1382 | ||
bd55775c JHS |
1383 | extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, |
1384 | u32 seq); | |
26b15dad | 1385 | extern int xfrm_state_delete(struct xfrm_state *x); |
0e602451 | 1386 | extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); |
e071041b AD |
1387 | extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); |
1388 | extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); | |
afeb14b4 PM |
1389 | extern int xfrm_replay_check(struct xfrm_state *x, |
1390 | struct sk_buff *skb, __be32 seq); | |
61f4627b | 1391 | extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); |
f8cd5488 | 1392 | extern void xfrm_replay_notify(struct xfrm_state *x, int event); |
1da177e4 | 1393 | extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); |
72cb6962 | 1394 | extern int xfrm_init_state(struct xfrm_state *x); |
227620e2 | 1395 | extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); |
716062fd HX |
1396 | extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, |
1397 | int encap_type); | |
1bf06cd2 | 1398 | extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); |
c6581a45 | 1399 | extern int xfrm_output_resume(struct sk_buff *skb, int err); |
406ef77c | 1400 | extern int xfrm_output(struct sk_buff *skb); |
df9dcb45 | 1401 | extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
36cf9acf | 1402 | extern int xfrm4_extract_header(struct sk_buff *skb); |
227620e2 | 1403 | extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
c4541b41 HX |
1404 | extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
1405 | int encap_type); | |
716062fd | 1406 | extern int xfrm4_transport_finish(struct sk_buff *skb, int async); |
1da177e4 | 1407 | extern int xfrm4_rcv(struct sk_buff *skb); |
c4541b41 HX |
1408 | |
1409 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1410 | { | |
1411 | return xfrm4_rcv_encap(skb, nexthdr, spi, 0); | |
1412 | } | |
1413 | ||
36cf9acf HX |
1414 | extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1415 | extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1da177e4 | 1416 | extern int xfrm4_output(struct sk_buff *skb); |
c0d56408 KM |
1417 | extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1418 | extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
36cf9acf | 1419 | extern int xfrm6_extract_header(struct sk_buff *skb); |
227620e2 | 1420 | extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
33b5ecb8 | 1421 | extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); |
716062fd | 1422 | extern int xfrm6_transport_finish(struct sk_buff *skb, int async); |
e5bbef20 | 1423 | extern int xfrm6_rcv(struct sk_buff *skb); |
fbd9a5b4 MN |
1424 | extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, |
1425 | xfrm_address_t *saddr, u8 proto); | |
73d605d1 KM |
1426 | extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
1427 | extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); | |
a1664773 | 1428 | extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
a1664773 | 1429 | extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, xfrm_address_t *saddr); |
36cf9acf HX |
1430 | extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1431 | extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1da177e4 | 1432 | extern int xfrm6_output(struct sk_buff *skb); |
aee5adb4 MN |
1433 | extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
1434 | u8 **prevhdr); | |
1da177e4 LT |
1435 | |
1436 | #ifdef CONFIG_XFRM | |
067b207b | 1437 | extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1da177e4 | 1438 | extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); |
1da177e4 LT |
1439 | #else |
1440 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1441 | { | |
1442 | return -ENOPROTOOPT; | |
1443 | } | |
1444 | ||
067b207b | 1445 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
1446 | { |
1447 | /* should not happen */ | |
1448 | kfree_skb(skb); | |
1449 | return 0; | |
1450 | } | |
1da177e4 LT |
1451 | #endif |
1452 | ||
0331b1f3 | 1453 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
4c563f76 | 1454 | |
12a169e7 | 1455 | extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
cdcbca7c | 1456 | extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, |
4c563f76 | 1457 | int (*func)(struct xfrm_policy *, int, int, void*), void *); |
12a169e7 | 1458 | extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); |
1da177e4 | 1459 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
8ca2e93b JHS |
1460 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, |
1461 | u8 type, int dir, | |
4e81bb83 | 1462 | struct xfrm_selector *sel, |
ef41aaa0 EP |
1463 | struct xfrm_sec_ctx *ctx, int delete, |
1464 | int *err); | |
8ca2e93b | 1465 | struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err); |
33ffbbd5 | 1466 | int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); |
1da177e4 | 1467 | u32 xfrm_get_acqseq(void); |
658b219e | 1468 | extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
bd55775c JHS |
1469 | struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark, |
1470 | u8 mode, u32 reqid, u8 proto, | |
1471 | xfrm_address_t *daddr, | |
1472 | xfrm_address_t *saddr, int create, | |
1473 | unsigned short family); | |
1da177e4 | 1474 | extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
1da177e4 | 1475 | |
80c9abaa SS |
1476 | #ifdef CONFIG_XFRM_MIGRATE |
1477 | extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
13c1d189 AE |
1478 | struct xfrm_migrate *m, int num_bundles, |
1479 | struct xfrm_kmaddress *k); | |
80c9abaa SS |
1480 | extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); |
1481 | extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, | |
1482 | struct xfrm_migrate *m); | |
1483 | extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
13c1d189 AE |
1484 | struct xfrm_migrate *m, int num_bundles, |
1485 | struct xfrm_kmaddress *k); | |
80c9abaa SS |
1486 | #endif |
1487 | ||
5d36b180 | 1488 | extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
6c5c8ca7 | 1489 | extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); |
db983c11 | 1490 | extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
1da177e4 LT |
1491 | |
1492 | extern void xfrm_input_init(void); | |
6067b2ba | 1493 | extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); |
1da177e4 LT |
1494 | |
1495 | extern void xfrm_probe_algs(void); | |
1496 | extern int xfrm_count_auth_supported(void); | |
1497 | extern int xfrm_count_enc_supported(void); | |
1498 | extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1499 | extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1500 | extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1501 | extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1502 | extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1503 | extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); | |
1504 | extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); | |
1505 | extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); | |
1a6509d9 HX |
1506 | extern struct xfrm_algo_desc *xfrm_aead_get_byname(char *name, int icv_len, |
1507 | int probe); | |
1da177e4 | 1508 | |
07d4ee58 | 1509 | struct hash_desc; |
9409f38a | 1510 | struct scatterlist; |
07d4ee58 HX |
1511 | typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, |
1512 | unsigned int); | |
1da177e4 | 1513 | |
1da177e4 LT |
1514 | static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, |
1515 | int family) | |
1516 | { | |
1517 | switch (family) { | |
1518 | default: | |
1519 | case AF_INET: | |
a6337463 | 1520 | return (__force u32)a->a4 - (__force u32)b->a4; |
1da177e4 LT |
1521 | case AF_INET6: |
1522 | return ipv6_addr_cmp((struct in6_addr *)a, | |
1523 | (struct in6_addr *)b); | |
1524 | } | |
1525 | } | |
1526 | ||
77d8d7a6 HX |
1527 | static inline int xfrm_policy_id2dir(u32 index) |
1528 | { | |
1529 | return index & 7; | |
1530 | } | |
1531 | ||
a6483b79 AD |
1532 | #ifdef CONFIG_XFRM |
1533 | static inline int xfrm_aevent_is_on(struct net *net) | |
f8cd5488 | 1534 | { |
be33690d PM |
1535 | struct sock *nlsk; |
1536 | int ret = 0; | |
1537 | ||
1538 | rcu_read_lock(); | |
a6483b79 | 1539 | nlsk = rcu_dereference(net->xfrm.nlsk); |
be33690d PM |
1540 | if (nlsk) |
1541 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1542 | rcu_read_unlock(); | |
1543 | return ret; | |
f8cd5488 | 1544 | } |
a6483b79 | 1545 | #endif |
f8cd5488 | 1546 | |
0f99be0d ED |
1547 | static inline int xfrm_alg_len(struct xfrm_algo *alg) |
1548 | { | |
1549 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1550 | } | |
1551 | ||
4447bb33 MW |
1552 | static inline int xfrm_alg_auth_len(struct xfrm_algo_auth *alg) |
1553 | { | |
1554 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1555 | } | |
1556 | ||
80c9abaa SS |
1557 | #ifdef CONFIG_XFRM_MIGRATE |
1558 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) | |
1559 | { | |
0f99be0d | 1560 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
80c9abaa SS |
1561 | } |
1562 | ||
4447bb33 MW |
1563 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
1564 | { | |
1565 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); | |
1566 | } | |
1567 | ||
80c9abaa SS |
1568 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
1569 | { | |
1570 | int i; | |
1571 | for (i = 0; i < n; i++) | |
1572 | xfrm_state_put(*(states + i)); | |
1573 | } | |
1574 | ||
1575 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1576 | { | |
1577 | int i; | |
1578 | for (i = 0; i < n; i++) | |
1579 | xfrm_state_delete(*(states + i)); | |
1580 | } | |
1581 | #endif | |
f8cd5488 | 1582 | |
def8b4fa | 1583 | #ifdef CONFIG_XFRM |
00501121 HX |
1584 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
1585 | { | |
1586 | return skb->sp->xvec[skb->sp->len - 1]; | |
1587 | } | |
def8b4fa | 1588 | #endif |
00501121 | 1589 | |
bf825f81 JHS |
1590 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
1591 | { | |
1592 | if (attrs[XFRMA_MARK]) | |
4efd7e83 | 1593 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
bf825f81 JHS |
1594 | else |
1595 | m->v = m->m = 0; | |
1596 | ||
1597 | return m->v & m->m; | |
1598 | } | |
1599 | ||
1600 | static inline int xfrm_mark_put(struct sk_buff *skb, struct xfrm_mark *m) | |
1601 | { | |
1602 | if (m->m | m->v) | |
1603 | NLA_PUT(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); | |
1604 | return 0; | |
1605 | ||
1606 | nla_put_failure: | |
1607 | return -1; | |
1608 | } | |
1609 | ||
1da177e4 | 1610 | #endif /* _NET_XFRM_H */ |