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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _NET_XFRM_H |
3 | #define _NET_XFRM_H | |
4 | ||
aabc9761 | 5 | #include <linux/compiler.h> |
1da177e4 LT |
6 | #include <linux/xfrm.h> |
7 | #include <linux/spinlock.h> | |
8 | #include <linux/list.h> | |
9 | #include <linux/skbuff.h> | |
14c85021 | 10 | #include <linux/socket.h> |
1da177e4 | 11 | #include <linux/pfkeyv2.h> |
5794708f | 12 | #include <linux/ipsec.h> |
1da177e4 | 13 | #include <linux/in6.h> |
4a3e2f71 | 14 | #include <linux/mutex.h> |
ab5f5e8b | 15 | #include <linux/audit.h> |
5a0e3ad6 | 16 | #include <linux/slab.h> |
88755e9c | 17 | #include <linux/refcount.h> |
1da177e4 LT |
18 | |
19 | #include <net/sock.h> | |
20 | #include <net/dst.h> | |
436a0a40 | 21 | #include <net/ip.h> |
1da177e4 LT |
22 | #include <net/route.h> |
23 | #include <net/ipv6.h> | |
24 | #include <net/ip6_fib.h> | |
fe1a5f03 | 25 | #include <net/flow.h> |
f203b76d | 26 | #include <net/gro_cells.h> |
9e0d57fd YP |
27 | |
28 | #include <linux/interrupt.h> | |
29 | ||
558f82ef MN |
30 | #ifdef CONFIG_XFRM_STATISTICS |
31 | #include <net/snmp.h> | |
32 | #endif | |
1da177e4 | 33 | |
d3d6dd3a MN |
34 | #define XFRM_PROTO_ESP 50 |
35 | #define XFRM_PROTO_AH 51 | |
36 | #define XFRM_PROTO_COMP 108 | |
37 | #define XFRM_PROTO_IPIP 4 | |
38 | #define XFRM_PROTO_IPV6 41 | |
39 | #define XFRM_PROTO_ROUTING IPPROTO_ROUTING | |
40 | #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS | |
41 | ||
fa9921e4 | 42 | #define XFRM_ALIGN4(len) (((len) + 3) & ~3) |
1da177e4 | 43 | #define XFRM_ALIGN8(len) (((len) + 7) & ~7) |
b59f45d0 HX |
44 | #define MODULE_ALIAS_XFRM_MODE(family, encap) \ |
45 | MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) | |
d3d6dd3a MN |
46 | #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ |
47 | MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) | |
ffdb5211 IT |
48 | #define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \ |
49 | MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto)) | |
1da177e4 | 50 | |
558f82ef | 51 | #ifdef CONFIG_XFRM_STATISTICS |
59c9940e | 52 | #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) |
558f82ef | 53 | #else |
59c9940e | 54 | #define XFRM_INC_STATS(net, field) ((void)(net)) |
558f82ef MN |
55 | #endif |
56 | ||
1da177e4 LT |
57 | |
58 | /* Organization of SPD aka "XFRM rules" | |
59 | ------------------------------------ | |
60 | ||
61 | Basic objects: | |
62 | - policy rule, struct xfrm_policy (=SPD entry) | |
63 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) | |
64 | - instance of a transformer, struct xfrm_state (=SA) | |
65 | - template to clone xfrm_state, struct xfrm_tmpl | |
66 | ||
67 | SPD is plain linear list of xfrm_policy rules, ordered by priority. | |
68 | (To be compatible with existing pfkeyv2 implementations, | |
69 | many rules with priority of 0x7fffffff are allowed to exist and | |
70 | such rules are ordered in an unpredictable way, thanks to bsd folks.) | |
71 | ||
72 | Lookup is plain linear search until the first match with selector. | |
73 | ||
74 | If "action" is "block", then we prohibit the flow, otherwise: | |
75 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, | |
76 | policy entry has list of up to XFRM_MAX_DEPTH transformations, | |
77 | described by templates xfrm_tmpl. Each template is resolved | |
78 | to a complete xfrm_state (see below) and we pack bundle of transformations | |
79 | to a dst_entry returned to requestor. | |
80 | ||
81 | dst -. xfrm .-> xfrm_state #1 | |
82 | |---. child .-> dst -. xfrm .-> xfrm_state #2 | |
83 | |---. child .-> dst -. xfrm .-> xfrm_state #3 | |
84 | |---. child .-> NULL | |
85 | ||
86 | Bundles are cached at xrfm_policy struct (field ->bundles). | |
87 | ||
88 | ||
89 | Resolution of xrfm_tmpl | |
90 | ----------------------- | |
91 | Template contains: | |
92 | 1. ->mode Mode: transport or tunnel | |
93 | 2. ->id.proto Protocol: AH/ESP/IPCOMP | |
94 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. | |
95 | Q: allow to resolve security gateway? | |
96 | 4. ->id.spi If not zero, static SPI. | |
97 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. | |
98 | 6. ->algos List of allowed algos. Plain bitmask now. | |
99 | Q: ealgos, aalgos, calgos. What a mess... | |
100 | 7. ->share Sharing mode. | |
101 | Q: how to implement private sharing mode? To add struct sock* to | |
102 | flow id? | |
103 | ||
104 | Having this template we search through SAD searching for entries | |
105 | with appropriate mode/proto/algo, permitted by selector. | |
106 | If no appropriate entry found, it is requested from key manager. | |
107 | ||
108 | PROBLEMS: | |
109 | Q: How to find all the bundles referring to a physical path for | |
110 | PMTU discovery? Seems, dst should contain list of all parents... | |
111 | and enter to infinite locking hierarchy disaster. | |
112 | No! It is easier, we will not search for them, let them find us. | |
113 | We add genid to each dst plus pointer to genid of raw IP route, | |
114 | pmtu disc will update pmtu on raw IP route and increase its genid. | |
115 | dst_check() will see this for top level and trigger resyncing | |
116 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. | |
117 | */ | |
118 | ||
12a169e7 HX |
119 | struct xfrm_state_walk { |
120 | struct list_head all; | |
121 | u8 state; | |
d3623099 ND |
122 | u8 dying; |
123 | u8 proto; | |
12a169e7 | 124 | u32 seq; |
870a2df4 | 125 | struct xfrm_address_filter *filter; |
12a169e7 HX |
126 | }; |
127 | ||
d77e38e6 SK |
128 | struct xfrm_state_offload { |
129 | struct net_device *dev; | |
272c2330 | 130 | struct net_device *slave_dev; |
d77e38e6 SK |
131 | unsigned long offload_handle; |
132 | unsigned int num_exthdrs; | |
133 | u8 flags; | |
134 | }; | |
135 | ||
c9500d7b FW |
136 | struct xfrm_mode { |
137 | u8 encap; | |
138 | u8 family; | |
139 | u8 flags; | |
140 | }; | |
141 | ||
142 | /* Flags for xfrm_mode. */ | |
143 | enum { | |
144 | XFRM_MODE_FLAG_TUNNEL = 1, | |
145 | }; | |
146 | ||
1da177e4 | 147 | /* Full description of state of transformer. */ |
fd2c3ef7 | 148 | struct xfrm_state { |
0c5c9fb5 | 149 | possible_net_t xs_net; |
abb81c4f | 150 | union { |
12a169e7 | 151 | struct hlist_node gclist; |
abb81c4f HX |
152 | struct hlist_node bydst; |
153 | }; | |
8f126e37 DM |
154 | struct hlist_node bysrc; |
155 | struct hlist_node byspi; | |
1da177e4 | 156 | |
88755e9c | 157 | refcount_t refcnt; |
1da177e4 LT |
158 | spinlock_t lock; |
159 | ||
160 | struct xfrm_id id; | |
161 | struct xfrm_selector sel; | |
bf825f81 | 162 | struct xfrm_mark mark; |
7e652640 | 163 | u32 if_id; |
35d2856b | 164 | u32 tfcpad; |
1da177e4 | 165 | |
9d4a706d DM |
166 | u32 genid; |
167 | ||
12a169e7 HX |
168 | /* Key manager bits */ |
169 | struct xfrm_state_walk km; | |
1da177e4 LT |
170 | |
171 | /* Parameters of this state. */ | |
172 | struct { | |
173 | u32 reqid; | |
174 | u8 mode; | |
175 | u8 replay_window; | |
176 | u8 aalgo, ealgo, calgo; | |
177 | u8 flags; | |
178 | u16 family; | |
179 | xfrm_address_t saddr; | |
180 | int header_len; | |
181 | int trailer_len; | |
a947b0a9 | 182 | u32 extra_flags; |
9b42c1f1 | 183 | struct xfrm_mark smark; |
1da177e4 LT |
184 | } props; |
185 | ||
186 | struct xfrm_lifetime_cfg lft; | |
187 | ||
188 | /* Data for transformer */ | |
4447bb33 | 189 | struct xfrm_algo_auth *aalg; |
1da177e4 LT |
190 | struct xfrm_algo *ealg; |
191 | struct xfrm_algo *calg; | |
1a6509d9 | 192 | struct xfrm_algo_aead *aead; |
69b0137f | 193 | const char *geniv; |
1da177e4 LT |
194 | |
195 | /* Data for encapsulator */ | |
196 | struct xfrm_encap_tmpl *encap; | |
e27cca96 | 197 | struct sock __rcu *encap_sk; |
1da177e4 | 198 | |
060f02a3 NT |
199 | /* Data for care-of address */ |
200 | xfrm_address_t *coaddr; | |
201 | ||
1da177e4 LT |
202 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
203 | struct xfrm_state *tunnel; | |
204 | ||
205 | /* If a tunnel, number of users + 1 */ | |
206 | atomic_t tunnel_users; | |
207 | ||
208 | /* State for replay detection */ | |
209 | struct xfrm_replay_state replay; | |
9736acf3 | 210 | struct xfrm_replay_state_esn *replay_esn; |
1da177e4 | 211 | |
f8cd5488 JHS |
212 | /* Replay detection state at the time we sent the last notification */ |
213 | struct xfrm_replay_state preplay; | |
9736acf3 | 214 | struct xfrm_replay_state_esn *preplay_esn; |
f8cd5488 | 215 | |
9fdc4883 | 216 | /* The functions for replay detection. */ |
e45a8a9e | 217 | const struct xfrm_replay *repl; |
9fdc4883 | 218 | |
2717096a JHS |
219 | /* internal flag that only holds state for delayed aevent at the |
220 | * moment | |
221 | */ | |
222 | u32 xflags; | |
223 | ||
f8cd5488 JHS |
224 | /* Replay detection notification settings */ |
225 | u32 replay_maxage; | |
226 | u32 replay_maxdiff; | |
227 | ||
228 | /* Replay detection notification timer */ | |
229 | struct timer_list rtimer; | |
230 | ||
1da177e4 LT |
231 | /* Statistics */ |
232 | struct xfrm_stats stats; | |
233 | ||
234 | struct xfrm_lifetime_cur curlft; | |
671422b2 | 235 | struct hrtimer mtimer; |
1da177e4 | 236 | |
d77e38e6 SK |
237 | struct xfrm_state_offload xso; |
238 | ||
e3c0d047 FD |
239 | /* used to fix curlft->add_time when changing date */ |
240 | long saved_tmo; | |
241 | ||
9afaca05 | 242 | /* Last used time */ |
03dc7a35 | 243 | time64_t lastused; |
9afaca05 | 244 | |
cac2661c SK |
245 | struct page_frag xfrag; |
246 | ||
1da177e4 LT |
247 | /* Reference to data common to all the instances of this |
248 | * transformer. */ | |
533cb5b0 | 249 | const struct xfrm_type *type; |
c9500d7b FW |
250 | struct xfrm_mode inner_mode; |
251 | struct xfrm_mode inner_mode_iaf; | |
252 | struct xfrm_mode outer_mode; | |
1da177e4 | 253 | |
9d389d7f SK |
254 | const struct xfrm_type_offload *type_offload; |
255 | ||
df71837d TJ |
256 | /* Security context */ |
257 | struct xfrm_sec_ctx *security; | |
258 | ||
1da177e4 LT |
259 | /* Private data of this transformer, format is opaque, |
260 | * interpreted by xfrm_type methods. */ | |
261 | void *data; | |
262 | }; | |
263 | ||
673c09be AD |
264 | static inline struct net *xs_net(struct xfrm_state *x) |
265 | { | |
266 | return read_pnet(&x->xs_net); | |
267 | } | |
268 | ||
2717096a JHS |
269 | /* xflags - make enum if more show up */ |
270 | #define XFRM_TIME_DEFER 1 | |
e3c0d047 | 271 | #define XFRM_SOFT_EXPIRE 2 |
2717096a | 272 | |
1da177e4 LT |
273 | enum { |
274 | XFRM_STATE_VOID, | |
275 | XFRM_STATE_ACQ, | |
276 | XFRM_STATE_VALID, | |
277 | XFRM_STATE_ERROR, | |
278 | XFRM_STATE_EXPIRED, | |
279 | XFRM_STATE_DEAD | |
280 | }; | |
281 | ||
26b15dad | 282 | /* callback structure passed from either netlink or pfkey */ |
fd2c3ef7 | 283 | struct km_event { |
bf08867f HX |
284 | union { |
285 | u32 hard; | |
286 | u32 proto; | |
287 | u32 byid; | |
f8cd5488 | 288 | u32 aevent; |
f7b6983f | 289 | u32 type; |
bf08867f HX |
290 | } data; |
291 | ||
26b15dad | 292 | u32 seq; |
15e47304 | 293 | u32 portid; |
26b15dad | 294 | u32 event; |
7067802e | 295 | struct net *net; |
26b15dad JHS |
296 | }; |
297 | ||
9fdc4883 SK |
298 | struct xfrm_replay { |
299 | void (*advance)(struct xfrm_state *x, __be32 net_seq); | |
300 | int (*check)(struct xfrm_state *x, | |
301 | struct sk_buff *skb, | |
302 | __be32 net_seq); | |
3b59df46 SK |
303 | int (*recheck)(struct xfrm_state *x, |
304 | struct sk_buff *skb, | |
305 | __be32 net_seq); | |
9fdc4883 SK |
306 | void (*notify)(struct xfrm_state *x, int event); |
307 | int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); | |
308 | }; | |
309 | ||
f203b76d | 310 | struct xfrm_if_cb { |
025c65e1 MW |
311 | struct xfrm_if *(*decode_session)(struct sk_buff *skb, |
312 | unsigned short family); | |
f203b76d SK |
313 | }; |
314 | ||
315 | void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb); | |
316 | void xfrm_if_unregister_cb(void); | |
317 | ||
25ee3286 | 318 | struct net_device; |
1da177e4 LT |
319 | struct xfrm_type; |
320 | struct xfrm_dst; | |
321 | struct xfrm_policy_afinfo { | |
1da177e4 | 322 | struct dst_ops *dst_ops; |
42a7b32b DA |
323 | struct dst_entry *(*dst_lookup)(struct net *net, |
324 | int tos, int oif, | |
5e6b930f | 325 | const xfrm_address_t *saddr, |
077fbac4 LC |
326 | const xfrm_address_t *daddr, |
327 | u32 mark); | |
42a7b32b DA |
328 | int (*get_saddr)(struct net *net, int oif, |
329 | xfrm_address_t *saddr, | |
077fbac4 LC |
330 | xfrm_address_t *daddr, |
331 | u32 mark); | |
25ee3286 | 332 | int (*fill_dst)(struct xfrm_dst *xdst, |
87c1e12b | 333 | struct net_device *dev, |
0c7b3eef | 334 | const struct flowi *fl); |
2774c131 | 335 | struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); |
1da177e4 LT |
336 | }; |
337 | ||
a2817d8b FW |
338 | int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family); |
339 | void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo); | |
d511337a JP |
340 | void km_policy_notify(struct xfrm_policy *xp, int dir, |
341 | const struct km_event *c); | |
342 | void km_state_notify(struct xfrm_state *x, const struct km_event *c); | |
1da177e4 LT |
343 | |
344 | struct xfrm_tmpl; | |
d511337a JP |
345 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, |
346 | struct xfrm_policy *pol); | |
347 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); | |
348 | int __xfrm_state_delete(struct xfrm_state *x); | |
53bc6b4d | 349 | |
1da177e4 | 350 | struct xfrm_state_afinfo { |
4c203b04 FW |
351 | u8 family; |
352 | u8 proto; | |
4f518e80 FW |
353 | |
354 | const struct xfrm_type_offload *type_offload_esp; | |
355 | ||
356 | const struct xfrm_type *type_esp; | |
357 | const struct xfrm_type *type_ipip; | |
358 | const struct xfrm_type *type_ipip6; | |
359 | const struct xfrm_type *type_comp; | |
360 | const struct xfrm_type *type_ah; | |
361 | const struct xfrm_type *type_routing; | |
362 | const struct xfrm_type *type_dstopts; | |
9d389d7f | 363 | |
ede2059d | 364 | int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb); |
716062fd HX |
365 | int (*transport_finish)(struct sk_buff *skb, |
366 | int async); | |
628e341f | 367 | void (*local_error)(struct sk_buff *skb, u32 mtu); |
1da177e4 LT |
368 | }; |
369 | ||
d511337a JP |
370 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); |
371 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
372 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); | |
711059b9 | 373 | struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family); |
1da177e4 | 374 | |
2f32b51b | 375 | struct xfrm_input_afinfo { |
1475ee0a XL |
376 | u8 family; |
377 | bool is_ipip; | |
2f32b51b SK |
378 | int (*callback)(struct sk_buff *skb, u8 protocol, |
379 | int err); | |
380 | }; | |
381 | ||
960fdfde FW |
382 | int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo); |
383 | int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo); | |
2f32b51b | 384 | |
b48c05ab | 385 | void xfrm_flush_gc(void); |
d511337a | 386 | void xfrm_state_delete_tunnel(struct xfrm_state *x); |
1da177e4 | 387 | |
fd2c3ef7 | 388 | struct xfrm_type { |
1da177e4 LT |
389 | char *description; |
390 | struct module *owner; | |
a6337463 | 391 | u8 proto; |
392 | u8 flags; | |
1b5c2299 | 393 | #define XFRM_TYPE_NON_FRAGMENT 1 |
436a0a40 | 394 | #define XFRM_TYPE_REPLAY_PROT 2 |
f04e7e8d HX |
395 | #define XFRM_TYPE_LOCAL_COADDR 4 |
396 | #define XFRM_TYPE_REMOTE_COADDR 8 | |
1da177e4 | 397 | |
72cb6962 | 398 | int (*init_state)(struct xfrm_state *x); |
1da177e4 | 399 | void (*destructor)(struct xfrm_state *); |
e695633e | 400 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 401 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
8f029de2 DM |
402 | int (*reject)(struct xfrm_state *, struct sk_buff *, |
403 | const struct flowi *); | |
aee5adb4 | 404 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
1da177e4 LT |
405 | }; |
406 | ||
d511337a | 407 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
4f518e80 | 408 | void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); |
1da177e4 | 409 | |
9d389d7f SK |
410 | struct xfrm_type_offload { |
411 | char *description; | |
412 | struct module *owner; | |
413 | u8 proto; | |
414 | void (*encap)(struct xfrm_state *, struct sk_buff *pskb); | |
415 | int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb); | |
416 | int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features); | |
417 | }; | |
418 | ||
419 | int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family); | |
4f518e80 | 420 | void xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family); |
9d389d7f | 421 | |
df9dcb45 KM |
422 | static inline int xfrm_af2proto(unsigned int family) |
423 | { | |
424 | switch(family) { | |
425 | case AF_INET: | |
426 | return IPPROTO_IPIP; | |
427 | case AF_INET6: | |
428 | return IPPROTO_IPV6; | |
429 | default: | |
430 | return 0; | |
431 | } | |
432 | } | |
433 | ||
4c145dce | 434 | static inline const struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) |
df9dcb45 KM |
435 | { |
436 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || | |
437 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) | |
c9500d7b | 438 | return &x->inner_mode; |
df9dcb45 | 439 | else |
c9500d7b | 440 | return &x->inner_mode_iaf; |
df9dcb45 KM |
441 | } |
442 | ||
fd2c3ef7 | 443 | struct xfrm_tmpl { |
1da177e4 LT |
444 | /* id in template is interpreted as: |
445 | * daddr - destination of tunnel, may be zero for transport mode. | |
446 | * spi - zero to acquire spi. Not zero if spi is static, then | |
447 | * daddr must be fixed too. | |
448 | * proto - AH/ESP/IPCOMP | |
449 | */ | |
450 | struct xfrm_id id; | |
451 | ||
452 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
453 | xfrm_address_t saddr; | |
454 | ||
76b3f055 MK |
455 | unsigned short encap_family; |
456 | ||
a6337463 | 457 | u32 reqid; |
1da177e4 | 458 | |
7e49e6de | 459 | /* Mode: transport, tunnel etc. */ |
a6337463 | 460 | u8 mode; |
1da177e4 LT |
461 | |
462 | /* Sharing mode: unique, this session only, this user only etc. */ | |
a6337463 | 463 | u8 share; |
1da177e4 LT |
464 | |
465 | /* May skip this transfomration if no SA is found */ | |
a6337463 | 466 | u8 optional; |
1da177e4 | 467 | |
c5d18e98 | 468 | /* Skip aalgos/ealgos/calgos checks. */ |
a6337463 | 469 | u8 allalgs; |
c5d18e98 | 470 | |
1da177e4 | 471 | /* Bit mask of algos allowed for acquisition */ |
a6337463 | 472 | u32 aalgos; |
473 | u32 ealgos; | |
474 | u32 calgos; | |
1da177e4 LT |
475 | }; |
476 | ||
622dc828 | 477 | #define XFRM_MAX_DEPTH 6 |
54ef207a | 478 | #define XFRM_MAX_OFFLOAD_DEPTH 1 |
1da177e4 | 479 | |
12a169e7 HX |
480 | struct xfrm_policy_walk_entry { |
481 | struct list_head all; | |
482 | u8 dead; | |
483 | }; | |
484 | ||
485 | struct xfrm_policy_walk { | |
486 | struct xfrm_policy_walk_entry walk; | |
487 | u8 type; | |
488 | u32 seq; | |
489 | }; | |
490 | ||
a0073fe1 SK |
491 | struct xfrm_policy_queue { |
492 | struct sk_buff_head hold_queue; | |
493 | struct timer_list hold_timer; | |
494 | unsigned long timeout; | |
495 | }; | |
496 | ||
fd2c3ef7 | 497 | struct xfrm_policy { |
0c5c9fb5 | 498 | possible_net_t xp_net; |
2518c7c2 DM |
499 | struct hlist_node bydst; |
500 | struct hlist_node byidx; | |
1da177e4 LT |
501 | |
502 | /* This lock only affects elements except for entry. */ | |
503 | rwlock_t lock; | |
850a6212 | 504 | refcount_t refcnt; |
6be3b0db | 505 | u32 pos; |
1da177e4 LT |
506 | struct timer_list timer; |
507 | ||
80c802f3 | 508 | atomic_t genid; |
1da177e4 LT |
509 | u32 priority; |
510 | u32 index; | |
7e652640 | 511 | u32 if_id; |
bf825f81 | 512 | struct xfrm_mark mark; |
1da177e4 LT |
513 | struct xfrm_selector selector; |
514 | struct xfrm_lifetime_cfg lft; | |
515 | struct xfrm_lifetime_cur curlft; | |
12a169e7 | 516 | struct xfrm_policy_walk_entry walk; |
a0073fe1 | 517 | struct xfrm_policy_queue polq; |
9cf545eb | 518 | bool bydst_reinsert; |
46ca5f5d ACM |
519 | u8 type; |
520 | u8 action; | |
521 | u8 flags; | |
46ca5f5d | 522 | u8 xfrm_nr; |
12a169e7 | 523 | u16 family; |
df71837d | 524 | struct xfrm_sec_ctx *security; |
1da177e4 | 525 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
24969fac | 526 | struct hlist_node bydst_inexact_list; |
56f04730 | 527 | struct rcu_head rcu; |
1da177e4 LT |
528 | }; |
529 | ||
63eb23f5 | 530 | static inline struct net *xp_net(const struct xfrm_policy *xp) |
0331b1f3 AD |
531 | { |
532 | return read_pnet(&xp->xp_net); | |
533 | } | |
534 | ||
13c1d189 AE |
535 | struct xfrm_kmaddress { |
536 | xfrm_address_t local; | |
537 | xfrm_address_t remote; | |
538 | u32 reserved; | |
539 | u16 family; | |
540 | }; | |
541 | ||
80c9abaa SS |
542 | struct xfrm_migrate { |
543 | xfrm_address_t old_daddr; | |
544 | xfrm_address_t old_saddr; | |
545 | xfrm_address_t new_daddr; | |
546 | xfrm_address_t new_saddr; | |
547 | u8 proto; | |
548 | u8 mode; | |
549 | u16 reserved; | |
550 | u32 reqid; | |
551 | u16 old_family; | |
552 | u16 new_family; | |
553 | }; | |
554 | ||
f8cd5488 | 555 | #define XFRM_KM_TIMEOUT 30 |
f8cd5488 JHS |
556 | /* what happened */ |
557 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
558 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
559 | ||
560 | /* default aevent timeout in units of 100ms */ | |
561 | #define XFRM_AE_ETIME 10 | |
562 | /* Async Event timer multiplier */ | |
563 | #define XFRM_AE_ETH_M 10 | |
564 | /* default seq threshold size */ | |
565 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 | 566 | |
fd2c3ef7 | 567 | struct xfrm_mgr { |
1da177e4 | 568 | struct list_head list; |
214e005b | 569 | int (*notify)(struct xfrm_state *x, const struct km_event *c); |
65e0736b | 570 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); |
cb969f07 | 571 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 572 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
214e005b | 573 | int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); |
db983c11 | 574 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
183cad12 DM |
575 | int (*migrate)(const struct xfrm_selector *sel, |
576 | u8 dir, u8 type, | |
577 | const struct xfrm_migrate *m, | |
578 | int num_bundles, | |
8bafd730 AA |
579 | const struct xfrm_kmaddress *k, |
580 | const struct xfrm_encap_tmpl *encap); | |
0f24558e | 581 | bool (*is_alive)(const struct km_event *c); |
1da177e4 LT |
582 | }; |
583 | ||
d511337a JP |
584 | int xfrm_register_km(struct xfrm_mgr *km); |
585 | int xfrm_unregister_km(struct xfrm_mgr *km); | |
1da177e4 | 586 | |
70be6c91 SK |
587 | struct xfrm_tunnel_skb_cb { |
588 | union { | |
589 | struct inet_skb_parm h4; | |
590 | struct inet6_skb_parm h6; | |
591 | } header; | |
592 | ||
593 | union { | |
594 | struct ip_tunnel *ip4; | |
595 | struct ip6_tnl *ip6; | |
596 | } tunnel; | |
597 | }; | |
598 | ||
599 | #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) | |
600 | ||
436a0a40 HX |
601 | /* |
602 | * This structure is used for the duration where packets are being | |
603 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
604 | * area beyond the generic IP part may be overwritten. | |
605 | */ | |
606 | struct xfrm_skb_cb { | |
70be6c91 | 607 | struct xfrm_tunnel_skb_cb header; |
436a0a40 HX |
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 { | |
70be6c91 | 629 | struct xfrm_tunnel_skb_cb header; |
36cf9acf HX |
630 | |
631 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
632 | __be16 id; | |
633 | __be16 frag_off; | |
634 | ||
732c8bd5 HX |
635 | /* IP header length (excluding options or extension headers). */ |
636 | u8 ihl; | |
637 | ||
36cf9acf HX |
638 | /* TOS for IPv4, class for IPv6. */ |
639 | u8 tos; | |
640 | ||
641 | /* TTL for IPv4, hop limitfor IPv6. */ | |
642 | u8 ttl; | |
643 | ||
644 | /* Protocol for IPv4, NH for IPv6. */ | |
645 | u8 protocol; | |
646 | ||
732c8bd5 HX |
647 | /* Option length for IPv4, zero for IPv6. */ |
648 | u8 optlen; | |
649 | ||
36cf9acf HX |
650 | /* Used by IPv6 only, zero for IPv4. */ |
651 | u8 flow_lbl[3]; | |
652 | }; | |
653 | ||
654 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
655 | ||
716062fd HX |
656 | /* |
657 | * This structure is used by the input processing to locate the SPI and | |
658 | * related information. | |
659 | */ | |
660 | struct xfrm_spi_skb_cb { | |
70be6c91 | 661 | struct xfrm_tunnel_skb_cb header; |
716062fd | 662 | |
716062fd | 663 | unsigned int daddroff; |
2fcb45b6 | 664 | unsigned int family; |
7785bba2 | 665 | __be32 seq; |
716062fd HX |
666 | }; |
667 | ||
668 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) | |
669 | ||
c9204d9c | 670 | #ifdef CONFIG_AUDITSYSCALL |
afeb14b4 | 671 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
ab5f5e8b JL |
672 | { |
673 | struct audit_buffer *audit_buf = NULL; | |
ab5f5e8b | 674 | |
f7859590 | 675 | if (audit_enabled == AUDIT_OFF) |
afeb14b4 | 676 | return NULL; |
cdfb6b34 | 677 | audit_buf = audit_log_start(audit_context(), GFP_ATOMIC, |
afeb14b4 | 678 | AUDIT_MAC_IPSEC_EVENT); |
ab5f5e8b JL |
679 | if (audit_buf == NULL) |
680 | return NULL; | |
afeb14b4 PM |
681 | audit_log_format(audit_buf, "op=%s", op); |
682 | return audit_buf; | |
683 | } | |
ab5f5e8b | 684 | |
2e71029e | 685 | static inline void xfrm_audit_helper_usrinfo(bool task_valid, |
afeb14b4 PM |
686 | struct audit_buffer *audit_buf) |
687 | { | |
2e71029e TH |
688 | const unsigned int auid = from_kuid(&init_user_ns, task_valid ? |
689 | audit_get_loginuid(current) : | |
690 | INVALID_UID); | |
691 | const unsigned int ses = task_valid ? audit_get_sessionid(current) : | |
f0b75216 | 692 | AUDIT_SID_UNSET; |
2e71029e TH |
693 | |
694 | audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); | |
f1370cc4 | 695 | audit_log_task_context(audit_buf); |
ab5f5e8b JL |
696 | } |
697 | ||
2e71029e TH |
698 | void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid); |
699 | void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
700 | bool task_valid); | |
701 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid); | |
702 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid); | |
d511337a JP |
703 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
704 | struct sk_buff *skb); | |
705 | void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, | |
706 | __be32 net_seq); | |
707 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); | |
708 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, | |
709 | __be32 net_seq); | |
710 | void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, | |
711 | u8 proto); | |
c9204d9c | 712 | #else |
41fef0ee MS |
713 | |
714 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
2e71029e | 715 | bool task_valid) |
41fef0ee MS |
716 | { |
717 | } | |
718 | ||
719 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
2e71029e | 720 | bool task_valid) |
41fef0ee MS |
721 | { |
722 | } | |
723 | ||
724 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
2e71029e | 725 | bool task_valid) |
41fef0ee MS |
726 | { |
727 | } | |
728 | ||
729 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
2e71029e | 730 | bool task_valid) |
41fef0ee MS |
731 | { |
732 | } | |
733 | ||
734 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
735 | struct sk_buff *skb) | |
736 | { | |
737 | } | |
738 | ||
9fdc4883 SK |
739 | static inline void xfrm_audit_state_replay(struct xfrm_state *x, |
740 | struct sk_buff *skb, __be32 net_seq) | |
741 | { | |
742 | } | |
743 | ||
41fef0ee MS |
744 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, |
745 | u16 family) | |
746 | { | |
747 | } | |
748 | ||
749 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
750 | __be32 net_spi, __be32 net_seq) | |
751 | { | |
752 | } | |
753 | ||
754 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
755 | struct sk_buff *skb, u8 proto) | |
756 | { | |
757 | } | |
c9204d9c | 758 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 759 | |
1da177e4 LT |
760 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
761 | { | |
762 | if (likely(policy != NULL)) | |
850a6212 | 763 | refcount_inc(&policy->refcnt); |
1da177e4 LT |
764 | } |
765 | ||
d511337a | 766 | void xfrm_policy_destroy(struct xfrm_policy *policy); |
1da177e4 LT |
767 | |
768 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
769 | { | |
850a6212 | 770 | if (refcount_dec_and_test(&policy->refcnt)) |
64c31b3f | 771 | xfrm_policy_destroy(policy); |
1da177e4 LT |
772 | } |
773 | ||
4e81bb83 MN |
774 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
775 | { | |
776 | int i; | |
777 | for (i = npols - 1; i >= 0; --i) | |
778 | xfrm_pol_put(pols[i]); | |
779 | } | |
4e81bb83 | 780 | |
f75a2804 | 781 | void __xfrm_state_destroy(struct xfrm_state *, bool); |
1da177e4 | 782 | |
21380b81 HX |
783 | static inline void __xfrm_state_put(struct xfrm_state *x) |
784 | { | |
88755e9c | 785 | refcount_dec(&x->refcnt); |
21380b81 HX |
786 | } |
787 | ||
1da177e4 LT |
788 | static inline void xfrm_state_put(struct xfrm_state *x) |
789 | { | |
88755e9c | 790 | if (refcount_dec_and_test(&x->refcnt)) |
f75a2804 CW |
791 | __xfrm_state_destroy(x, false); |
792 | } | |
793 | ||
794 | static inline void xfrm_state_put_sync(struct xfrm_state *x) | |
795 | { | |
796 | if (refcount_dec_and_test(&x->refcnt)) | |
797 | __xfrm_state_destroy(x, true); | |
1da177e4 LT |
798 | } |
799 | ||
800 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
801 | { | |
88755e9c | 802 | refcount_inc(&x->refcnt); |
1da177e4 LT |
803 | } |
804 | ||
1744a8fe | 805 | static inline bool addr_match(const void *token1, const void *token2, |
e1b0048e | 806 | unsigned int prefixlen) |
1da177e4 | 807 | { |
1744a8fe DM |
808 | const __be32 *a1 = token1; |
809 | const __be32 *a2 = token2; | |
e1b0048e AD |
810 | unsigned int pdw; |
811 | unsigned int pbi; | |
1da177e4 | 812 | |
a6337463 | 813 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
1da177e4 LT |
814 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
815 | ||
816 | if (pdw) | |
817 | if (memcmp(a1, a2, pdw << 2)) | |
1744a8fe | 818 | return false; |
1da177e4 LT |
819 | |
820 | if (pbi) { | |
5f19343f | 821 | __be32 mask; |
1da177e4 LT |
822 | |
823 | mask = htonl((0xffffffff) << (32 - pbi)); | |
824 | ||
825 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
1744a8fe | 826 | return false; |
1da177e4 LT |
827 | } |
828 | ||
1744a8fe | 829 | return true; |
1da177e4 LT |
830 | } |
831 | ||
26bff940 AD |
832 | static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) |
833 | { | |
834 | /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ | |
6c786bcb | 835 | if (sizeof(long) == 4 && prefixlen == 0) |
26bff940 | 836 | return true; |
6c786bcb | 837 | return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen))); |
26bff940 AD |
838 | } |
839 | ||
1da177e4 | 840 | static __inline__ |
6281dcc9 | 841 | __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 842 | { |
f9d07e41 | 843 | __be16 port; |
1d28f42c | 844 | switch(fl->flowi_proto) { |
1da177e4 LT |
845 | case IPPROTO_TCP: |
846 | case IPPROTO_UDP: | |
ba4e58ec | 847 | case IPPROTO_UDPLITE: |
1da177e4 | 848 | case IPPROTO_SCTP: |
6281dcc9 | 849 | port = uli->ports.sport; |
1da177e4 LT |
850 | break; |
851 | case IPPROTO_ICMP: | |
852 | case IPPROTO_ICMPV6: | |
6281dcc9 | 853 | port = htons(uli->icmpt.type); |
1da177e4 | 854 | break; |
2ce4272a | 855 | case IPPROTO_MH: |
6281dcc9 | 856 | port = htons(uli->mht.type); |
2ce4272a | 857 | break; |
cc9ff19d | 858 | case IPPROTO_GRE: |
6281dcc9 | 859 | port = htons(ntohl(uli->gre_key) >> 16); |
cc9ff19d | 860 | break; |
1da177e4 LT |
861 | default: |
862 | port = 0; /*XXX*/ | |
863 | } | |
864 | return port; | |
865 | } | |
866 | ||
867 | static __inline__ | |
6281dcc9 | 868 | __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 869 | { |
f9d07e41 | 870 | __be16 port; |
1d28f42c | 871 | switch(fl->flowi_proto) { |
1da177e4 LT |
872 | case IPPROTO_TCP: |
873 | case IPPROTO_UDP: | |
ba4e58ec | 874 | case IPPROTO_UDPLITE: |
1da177e4 | 875 | case IPPROTO_SCTP: |
6281dcc9 | 876 | port = uli->ports.dport; |
1da177e4 LT |
877 | break; |
878 | case IPPROTO_ICMP: | |
879 | case IPPROTO_ICMPV6: | |
6281dcc9 | 880 | port = htons(uli->icmpt.code); |
1da177e4 | 881 | break; |
cc9ff19d | 882 | case IPPROTO_GRE: |
6281dcc9 | 883 | port = htons(ntohl(uli->gre_key) & 0xffff); |
cc9ff19d | 884 | break; |
1da177e4 LT |
885 | default: |
886 | port = 0; /*XXX*/ | |
887 | } | |
888 | return port; | |
889 | } | |
890 | ||
d511337a JP |
891 | bool xfrm_selector_match(const struct xfrm_selector *sel, |
892 | const struct flowi *fl, unsigned short family); | |
1da177e4 | 893 | |
df71837d TJ |
894 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
895 | /* If neither has a context --> match | |
896 | * Otherwise, both must have a context and the sids, doi, alg must match | |
897 | */ | |
bc9b35ad | 898 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d TJ |
899 | { |
900 | return ((!s1 && !s2) || | |
901 | (s1 && s2 && | |
902 | (s1->ctx_sid == s2->ctx_sid) && | |
903 | (s1->ctx_doi == s2->ctx_doi) && | |
904 | (s1->ctx_alg == s2->ctx_alg))); | |
905 | } | |
906 | #else | |
bc9b35ad | 907 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d | 908 | { |
bc9b35ad | 909 | return true; |
df71837d TJ |
910 | } |
911 | #endif | |
912 | ||
1da177e4 LT |
913 | /* A struct encoding bundle of transformations to apply to some set of flow. |
914 | * | |
b6ca8bd5 | 915 | * xdst->child points to the next element of bundle. |
1da177e4 LT |
916 | * dst->xfrm points to an instanse of transformer. |
917 | * | |
918 | * Due to unfortunate limitations of current routing cache, which we | |
919 | * have no time to fix, it mirrors struct rtable and bound to the same | |
920 | * routing key, including saddr,daddr. However, we can have many of | |
921 | * bundles differing by session id. All the bundles grow from a parent | |
922 | * policy rule. | |
923 | */ | |
fd2c3ef7 | 924 | struct xfrm_dst { |
1da177e4 | 925 | union { |
1da177e4 LT |
926 | struct dst_entry dst; |
927 | struct rtable rt; | |
928 | struct rt6_info rt6; | |
929 | } u; | |
930 | struct dst_entry *route; | |
b6ca8bd5 | 931 | struct dst_entry *child; |
0f6c480f | 932 | struct dst_entry *path; |
80c802f3 TT |
933 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; |
934 | int num_pols, num_xfrms; | |
80c802f3 TT |
935 | u32 xfrm_genid; |
936 | u32 policy_genid; | |
1da177e4 LT |
937 | u32 route_mtu_cached; |
938 | u32 child_mtu_cached; | |
92d63dec HY |
939 | u32 route_cookie; |
940 | u32 path_cookie; | |
1da177e4 LT |
941 | }; |
942 | ||
0f6c480f DM |
943 | static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst) |
944 | { | |
945 | #ifdef CONFIG_XFRM | |
946 | if (dst->xfrm) { | |
947 | const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst; | |
948 | ||
949 | return xdst->path; | |
950 | } | |
951 | #endif | |
952 | return (struct dst_entry *) dst; | |
953 | } | |
954 | ||
b92cf4aa DM |
955 | static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst) |
956 | { | |
957 | #ifdef CONFIG_XFRM | |
b6ca8bd5 DM |
958 | if (dst->xfrm) { |
959 | struct xfrm_dst *xdst = (struct xfrm_dst *) dst; | |
960 | return xdst->child; | |
961 | } | |
b92cf4aa DM |
962 | #endif |
963 | return NULL; | |
964 | } | |
965 | ||
def8b4fa | 966 | #ifdef CONFIG_XFRM |
45b018be DM |
967 | static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child) |
968 | { | |
b6ca8bd5 | 969 | xdst->child = child; |
45b018be DM |
970 | } |
971 | ||
aabc9761 HX |
972 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
973 | { | |
80c802f3 | 974 | xfrm_pols_put(xdst->pols, xdst->num_pols); |
aabc9761 HX |
975 | dst_release(xdst->route); |
976 | if (likely(xdst->u.dst.xfrm)) | |
977 | xfrm_state_put(xdst->u.dst.xfrm); | |
978 | } | |
def8b4fa | 979 | #endif |
aabc9761 | 980 | |
d511337a | 981 | void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); |
aabc9761 | 982 | |
f203b76d | 983 | struct xfrm_if_parms { |
f203b76d SK |
984 | int link; /* ifindex of underlying L2 interface */ |
985 | u32 if_id; /* interface identifyer */ | |
986 | }; | |
987 | ||
988 | struct xfrm_if { | |
989 | struct xfrm_if __rcu *next; /* next interface in list */ | |
990 | struct net_device *dev; /* virtual device associated with interface */ | |
f203b76d SK |
991 | struct net *net; /* netns for packet i/o */ |
992 | struct xfrm_if_parms p; /* interface parms */ | |
993 | ||
994 | struct gro_cells gro_cells; | |
995 | }; | |
996 | ||
54ef207a SK |
997 | struct xfrm_offload { |
998 | /* Output sequence number for replay protection on offloading. */ | |
999 | struct { | |
1000 | __u32 low; | |
1001 | __u32 hi; | |
1002 | } seq; | |
1003 | ||
1004 | __u32 flags; | |
1005 | #define SA_DELETE_REQ 1 | |
1006 | #define CRYPTO_DONE 2 | |
1007 | #define CRYPTO_NEXT_DONE 4 | |
1008 | #define CRYPTO_FALLBACK 8 | |
1009 | #define XFRM_GSO_SEGMENT 16 | |
1010 | #define XFRM_GRO 32 | |
47ebcc0b | 1011 | #define XFRM_ESP_NO_TRAILER 64 |
f53c7239 | 1012 | #define XFRM_DEV_RESUME 128 |
54ef207a SK |
1013 | |
1014 | __u32 status; | |
1015 | #define CRYPTO_SUCCESS 1 | |
1016 | #define CRYPTO_GENERIC_ERROR 2 | |
1017 | #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4 | |
1018 | #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8 | |
1019 | #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16 | |
1020 | #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32 | |
1021 | #define CRYPTO_INVALID_PACKET_SYNTAX 64 | |
1022 | #define CRYPTO_INVALID_PROTOCOL 128 | |
1023 | ||
1024 | __u8 proto; | |
1025 | }; | |
1026 | ||
fd2c3ef7 | 1027 | struct sec_path { |
1da177e4 | 1028 | int len; |
54ef207a SK |
1029 | int olen; |
1030 | ||
dbe5b4aa | 1031 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
54ef207a | 1032 | struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH]; |
1da177e4 LT |
1033 | }; |
1034 | ||
0ca64da1 | 1035 | struct sec_path *secpath_set(struct sk_buff *skb); |
1da177e4 LT |
1036 | |
1037 | static inline void | |
1038 | secpath_reset(struct sk_buff *skb) | |
1039 | { | |
1040 | #ifdef CONFIG_XFRM | |
4165079b | 1041 | skb_ext_del(skb, SKB_EXT_SEC_PATH); |
1da177e4 LT |
1042 | #endif |
1043 | } | |
1044 | ||
a1e59abf | 1045 | static inline int |
6cc32961 | 1046 | xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) |
a1e59abf PM |
1047 | { |
1048 | switch (family) { | |
1049 | case AF_INET: | |
1050 | return addr->a4 == 0; | |
1051 | case AF_INET6: | |
15e318bd | 1052 | return ipv6_addr_any(&addr->in6); |
a1e59abf PM |
1053 | } |
1054 | return 0; | |
1055 | } | |
1056 | ||
1da177e4 | 1057 | static inline int |
21eddb5c | 1058 | __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1059 | { |
1060 | return (tmpl->saddr.a4 && | |
1061 | tmpl->saddr.a4 != x->props.saddr.a4); | |
1062 | } | |
1063 | ||
1064 | static inline int | |
21eddb5c | 1065 | __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1066 | { |
1067 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
ff88b30c | 1068 | !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); |
1da177e4 LT |
1069 | } |
1070 | ||
1071 | static inline int | |
21eddb5c | 1072 | xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) |
1da177e4 LT |
1073 | { |
1074 | switch (family) { | |
1075 | case AF_INET: | |
1076 | return __xfrm4_state_addr_cmp(tmpl, x); | |
1077 | case AF_INET6: | |
1078 | return __xfrm6_state_addr_cmp(tmpl, x); | |
1079 | } | |
1080 | return !0; | |
1081 | } | |
1082 | ||
1083 | #ifdef CONFIG_XFRM | |
d511337a JP |
1084 | int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, |
1085 | unsigned short family); | |
1da177e4 | 1086 | |
d5422efe HX |
1087 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
1088 | struct sk_buff *skb, | |
1089 | unsigned int family, int reverse) | |
1da177e4 | 1090 | { |
f6e1e25d | 1091 | struct net *net = dev_net(skb->dev); |
d5422efe HX |
1092 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
1093 | ||
1da177e4 | 1094 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
d5422efe | 1095 | return __xfrm_policy_check(sk, ndir, skb, family); |
4e81bb83 | 1096 | |
26912e37 | 1097 | return (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) || |
adf30907 | 1098 | (skb_dst(skb)->flags & DST_NOPOLICY) || |
d5422efe HX |
1099 | __xfrm_policy_check(sk, ndir, skb, family); |
1100 | } | |
1101 | ||
1102 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1103 | { | |
1104 | return __xfrm_policy_check2(sk, dir, skb, family, 0); | |
1da177e4 LT |
1105 | } |
1106 | ||
1107 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1108 | { | |
1109 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
1110 | } | |
1111 | ||
1112 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1113 | { | |
1114 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
1115 | } | |
1116 | ||
d5422efe HX |
1117 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1118 | struct sk_buff *skb) | |
1119 | { | |
1120 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); | |
1121 | } | |
1122 | ||
1123 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1124 | struct sk_buff *skb) | |
1125 | { | |
1126 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); | |
1127 | } | |
1128 | ||
d511337a JP |
1129 | int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, |
1130 | unsigned int family, int reverse); | |
d5422efe HX |
1131 | |
1132 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1133 | unsigned int family) | |
1134 | { | |
1135 | return __xfrm_decode_session(skb, fl, family, 0); | |
1136 | } | |
1137 | ||
1138 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, | |
1139 | struct flowi *fl, | |
1140 | unsigned int family) | |
1141 | { | |
1142 | return __xfrm_decode_session(skb, fl, family, 1); | |
1143 | } | |
1144 | ||
d511337a | 1145 | int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
1da177e4 LT |
1146 | |
1147 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
1148 | { | |
99a66657 AD |
1149 | struct net *net = dev_net(skb->dev); |
1150 | ||
1151 | return !net->xfrm.policy_count[XFRM_POLICY_OUT] || | |
adf30907 | 1152 | (skb_dst(skb)->flags & DST_NOXFRM) || |
1da177e4 LT |
1153 | __xfrm_route_forward(skb, family); |
1154 | } | |
1155 | ||
1156 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
1157 | { | |
1158 | return xfrm_route_forward(skb, AF_INET); | |
1159 | } | |
1160 | ||
1161 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
1162 | { | |
1163 | return xfrm_route_forward(skb, AF_INET6); | |
1164 | } | |
1165 | ||
d188ba86 | 1166 | int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk); |
1da177e4 | 1167 | |
d188ba86 | 1168 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) |
1da177e4 | 1169 | { |
d188ba86 ED |
1170 | sk->sk_policy[0] = NULL; |
1171 | sk->sk_policy[1] = NULL; | |
1172 | if (unlikely(osk->sk_policy[0] || osk->sk_policy[1])) | |
1173 | return __xfrm_sk_clone_policy(sk, osk); | |
1da177e4 LT |
1174 | return 0; |
1175 | } | |
1176 | ||
d511337a | 1177 | int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
1178 | |
1179 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
1180 | { | |
d188ba86 ED |
1181 | struct xfrm_policy *pol; |
1182 | ||
1183 | pol = rcu_dereference_protected(sk->sk_policy[0], 1); | |
1184 | if (unlikely(pol != NULL)) { | |
1185 | xfrm_policy_delete(pol, XFRM_POLICY_MAX); | |
1da177e4 LT |
1186 | sk->sk_policy[0] = NULL; |
1187 | } | |
d188ba86 ED |
1188 | pol = rcu_dereference_protected(sk->sk_policy[1], 1); |
1189 | if (unlikely(pol != NULL)) { | |
1190 | xfrm_policy_delete(pol, XFRM_POLICY_MAX+1); | |
1da177e4 LT |
1191 | sk->sk_policy[1] = NULL; |
1192 | } | |
1193 | } | |
1194 | ||
1195 | #else | |
1196 | ||
1197 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
d188ba86 | 1198 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; } |
82695b30 SH |
1199 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } |
1200 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
1da177e4 | 1201 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
82695b30 SH |
1202 | { |
1203 | return 1; | |
1204 | } | |
1da177e4 LT |
1205 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
1206 | { | |
1207 | return 1; | |
1208 | } | |
1209 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1210 | { | |
1211 | return 1; | |
1212 | } | |
d5422efe HX |
1213 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
1214 | struct flowi *fl, | |
1215 | unsigned int family) | |
1216 | { | |
1217 | return -ENOSYS; | |
1218 | } | |
1219 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, | |
1220 | struct sk_buff *skb) | |
1221 | { | |
1222 | return 1; | |
1223 | } | |
1224 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1225 | struct sk_buff *skb) | |
1226 | { | |
1227 | return 1; | |
1228 | } | |
1da177e4 LT |
1229 | #endif |
1230 | ||
1231 | static __inline__ | |
e8a4e377 | 1232 | xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1233 | { |
1234 | switch (family){ | |
1235 | case AF_INET: | |
7e1dc7b6 | 1236 | return (xfrm_address_t *)&fl->u.ip4.daddr; |
1da177e4 | 1237 | case AF_INET6: |
7e1dc7b6 | 1238 | return (xfrm_address_t *)&fl->u.ip6.daddr; |
1da177e4 LT |
1239 | } |
1240 | return NULL; | |
1241 | } | |
1242 | ||
1243 | static __inline__ | |
e8a4e377 | 1244 | xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1245 | { |
1246 | switch (family){ | |
1247 | case AF_INET: | |
7e1dc7b6 | 1248 | return (xfrm_address_t *)&fl->u.ip4.saddr; |
1da177e4 | 1249 | case AF_INET6: |
7e1dc7b6 | 1250 | return (xfrm_address_t *)&fl->u.ip6.saddr; |
1da177e4 LT |
1251 | } |
1252 | return NULL; | |
1253 | } | |
1254 | ||
9bb182a7 | 1255 | static __inline__ |
e8a4e377 | 1256 | void xfrm_flowi_addr_get(const struct flowi *fl, |
9bb182a7 YH |
1257 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
1258 | unsigned short family) | |
1259 | { | |
1260 | switch(family) { | |
1261 | case AF_INET: | |
7e1dc7b6 DM |
1262 | memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); |
1263 | memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); | |
9bb182a7 YH |
1264 | break; |
1265 | case AF_INET6: | |
15e318bd JB |
1266 | saddr->in6 = fl->u.ip6.saddr; |
1267 | daddr->in6 = fl->u.ip6.daddr; | |
9bb182a7 YH |
1268 | break; |
1269 | } | |
1270 | } | |
1271 | ||
1da177e4 | 1272 | static __inline__ int |
f8848067 DM |
1273 | __xfrm4_state_addr_check(const struct xfrm_state *x, |
1274 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 LT |
1275 | { |
1276 | if (daddr->a4 == x->id.daddr.a4 && | |
1277 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
1278 | return 1; | |
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | static __inline__ int | |
f8848067 DM |
1283 | __xfrm6_state_addr_check(const struct xfrm_state *x, |
1284 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 | 1285 | { |
ff88b30c YH |
1286 | if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && |
1287 | (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || | |
82695b30 | 1288 | ipv6_addr_any((struct in6_addr *)saddr) || |
1da177e4 LT |
1289 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) |
1290 | return 1; | |
1291 | return 0; | |
1292 | } | |
1293 | ||
1294 | static __inline__ int | |
f8848067 DM |
1295 | xfrm_state_addr_check(const struct xfrm_state *x, |
1296 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, | |
1da177e4 LT |
1297 | unsigned short family) |
1298 | { | |
1299 | switch (family) { | |
1300 | case AF_INET: | |
1301 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
1302 | case AF_INET6: | |
1303 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
1304 | } | |
1305 | return 0; | |
1306 | } | |
1307 | ||
e53820de | 1308 | static __inline__ int |
f8848067 | 1309 | xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, |
e53820de MN |
1310 | unsigned short family) |
1311 | { | |
1312 | switch (family) { | |
1313 | case AF_INET: | |
1314 | return __xfrm4_state_addr_check(x, | |
7e1dc7b6 DM |
1315 | (const xfrm_address_t *)&fl->u.ip4.daddr, |
1316 | (const xfrm_address_t *)&fl->u.ip4.saddr); | |
e53820de MN |
1317 | case AF_INET6: |
1318 | return __xfrm6_state_addr_check(x, | |
7e1dc7b6 DM |
1319 | (const xfrm_address_t *)&fl->u.ip6.daddr, |
1320 | (const xfrm_address_t *)&fl->u.ip6.saddr); | |
e53820de MN |
1321 | } |
1322 | return 0; | |
1323 | } | |
1324 | ||
f8848067 | 1325 | static inline int xfrm_state_kern(const struct xfrm_state *x) |
1da177e4 LT |
1326 | { |
1327 | return atomic_read(&x->tunnel_users); | |
1328 | } | |
1329 | ||
dbb2483b CW |
1330 | static inline bool xfrm_id_proto_valid(u8 proto) |
1331 | { | |
1332 | switch (proto) { | |
1333 | case IPPROTO_AH: | |
1334 | case IPPROTO_ESP: | |
1335 | case IPPROTO_COMP: | |
1336 | #if IS_ENABLED(CONFIG_IPV6) | |
1337 | case IPPROTO_ROUTING: | |
1338 | case IPPROTO_DSTOPTS: | |
1339 | #endif | |
1340 | return true; | |
1341 | default: | |
1342 | return false; | |
1343 | } | |
1344 | } | |
1345 | ||
1346 | /* IPSEC_PROTO_ANY only matches 3 IPsec protocols, 0 could match all. */ | |
5794708f MN |
1347 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1348 | { | |
dc00a525 MN |
1349 | return (!userproto || proto == userproto || |
1350 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
1351 | proto == IPPROTO_ESP || | |
1352 | proto == IPPROTO_COMP))); | |
5794708f MN |
1353 | } |
1354 | ||
1da177e4 LT |
1355 | /* |
1356 | * xfrm algorithm information | |
1357 | */ | |
1a6509d9 | 1358 | struct xfrm_algo_aead_info { |
165ecc63 | 1359 | char *geniv; |
1a6509d9 HX |
1360 | u16 icv_truncbits; |
1361 | }; | |
1362 | ||
1da177e4 LT |
1363 | struct xfrm_algo_auth_info { |
1364 | u16 icv_truncbits; | |
1365 | u16 icv_fullbits; | |
1366 | }; | |
1367 | ||
1368 | struct xfrm_algo_encr_info { | |
165ecc63 | 1369 | char *geniv; |
1da177e4 LT |
1370 | u16 blockbits; |
1371 | u16 defkeybits; | |
1372 | }; | |
1373 | ||
1374 | struct xfrm_algo_comp_info { | |
1375 | u16 threshold; | |
1376 | }; | |
1377 | ||
1378 | struct xfrm_algo_desc { | |
1379 | char *name; | |
04ff1260 | 1380 | char *compat; |
1da177e4 | 1381 | u8 available:1; |
7e50f84c | 1382 | u8 pfkey_supported:1; |
1da177e4 | 1383 | union { |
1a6509d9 | 1384 | struct xfrm_algo_aead_info aead; |
1da177e4 LT |
1385 | struct xfrm_algo_auth_info auth; |
1386 | struct xfrm_algo_encr_info encr; | |
1387 | struct xfrm_algo_comp_info comp; | |
1388 | } uinfo; | |
1389 | struct sadb_alg desc; | |
1390 | }; | |
1391 | ||
3328715e SK |
1392 | /* XFRM protocol handlers. */ |
1393 | struct xfrm4_protocol { | |
1394 | int (*handler)(struct sk_buff *skb); | |
1395 | int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1396 | int encap_type); | |
1397 | int (*cb_handler)(struct sk_buff *skb, int err); | |
1398 | int (*err_handler)(struct sk_buff *skb, u32 info); | |
1399 | ||
1400 | struct xfrm4_protocol __rcu *next; | |
1401 | int priority; | |
1402 | }; | |
1403 | ||
7e14ea15 | 1404 | struct xfrm6_protocol { |
1da177e4 | 1405 | int (*handler)(struct sk_buff *skb); |
0146dca7 SD |
1406 | int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, |
1407 | int encap_type); | |
7e14ea15 SK |
1408 | int (*cb_handler)(struct sk_buff *skb, int err); |
1409 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
1410 | u8 type, u8 code, int offset, __be32 info); | |
d2acc347 | 1411 | |
7e14ea15 | 1412 | struct xfrm6_protocol __rcu *next; |
d2acc347 | 1413 | int priority; |
1da177e4 LT |
1414 | }; |
1415 | ||
1da177e4 LT |
1416 | /* XFRM tunnel handlers. */ |
1417 | struct xfrm_tunnel { | |
aba82695 | 1418 | int (*handler)(struct sk_buff *skb); |
a6337463 | 1419 | int (*err_handler)(struct sk_buff *skb, u32 info); |
d2acc347 | 1420 | |
b33eab08 | 1421 | struct xfrm_tunnel __rcu *next; |
aba82695 FD |
1422 | int priority; |
1423 | }; | |
1424 | ||
1da177e4 | 1425 | struct xfrm6_tunnel { |
d2acc347 HX |
1426 | int (*handler)(struct sk_buff *skb); |
1427 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
d5fdd6ba | 1428 | u8 type, u8 code, int offset, __be32 info); |
6f0bcf15 | 1429 | struct xfrm6_tunnel __rcu *next; |
d2acc347 | 1430 | int priority; |
1da177e4 LT |
1431 | }; |
1432 | ||
d511337a JP |
1433 | void xfrm_init(void); |
1434 | void xfrm4_init(void); | |
1435 | int xfrm_state_init(struct net *net); | |
1436 | void xfrm_state_fini(struct net *net); | |
1437 | void xfrm4_state_init(void); | |
2f32b51b | 1438 | void xfrm4_protocol_init(void); |
c35b7e72 | 1439 | #ifdef CONFIG_XFRM |
d511337a JP |
1440 | int xfrm6_init(void); |
1441 | void xfrm6_fini(void); | |
1442 | int xfrm6_state_init(void); | |
1443 | void xfrm6_state_fini(void); | |
7e14ea15 SK |
1444 | int xfrm6_protocol_init(void); |
1445 | void xfrm6_protocol_fini(void); | |
c35b7e72 DL |
1446 | #else |
1447 | static inline int xfrm6_init(void) | |
1448 | { | |
1449 | return 0; | |
1450 | } | |
1451 | static inline void xfrm6_fini(void) | |
1452 | { | |
1453 | ; | |
1454 | } | |
1455 | #endif | |
1da177e4 | 1456 | |
558f82ef | 1457 | #ifdef CONFIG_XFRM_STATISTICS |
d511337a JP |
1458 | int xfrm_proc_init(struct net *net); |
1459 | void xfrm_proc_fini(struct net *net); | |
558f82ef MN |
1460 | #endif |
1461 | ||
d511337a | 1462 | int xfrm_sysctl_init(struct net *net); |
b27aeadb | 1463 | #ifdef CONFIG_SYSCTL |
d511337a | 1464 | void xfrm_sysctl_fini(struct net *net); |
b27aeadb AD |
1465 | #else |
1466 | static inline void xfrm_sysctl_fini(struct net *net) | |
1467 | { | |
1468 | } | |
1469 | #endif | |
1470 | ||
d3623099 | 1471 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
870a2df4 | 1472 | struct xfrm_address_filter *filter); |
d511337a JP |
1473 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
1474 | int (*func)(struct xfrm_state *, int, void*), void *); | |
283bc9f3 | 1475 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); |
d511337a | 1476 | struct xfrm_state *xfrm_state_alloc(struct net *net); |
4a135e53 | 1477 | void xfrm_state_free(struct xfrm_state *x); |
d511337a JP |
1478 | struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, |
1479 | const xfrm_address_t *saddr, | |
1480 | const struct flowi *fl, | |
1481 | struct xfrm_tmpl *tmpl, | |
1482 | struct xfrm_policy *pol, int *err, | |
bc56b334 | 1483 | unsigned short family, u32 if_id); |
7e652640 | 1484 | struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id, |
d511337a JP |
1485 | xfrm_address_t *daddr, |
1486 | xfrm_address_t *saddr, | |
1487 | unsigned short family, | |
1488 | u8 mode, u8 proto, u32 reqid); | |
c454997e FD |
1489 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
1490 | unsigned short family); | |
d511337a JP |
1491 | int xfrm_state_check_expire(struct xfrm_state *x); |
1492 | void xfrm_state_insert(struct xfrm_state *x); | |
1493 | int xfrm_state_add(struct xfrm_state *x); | |
1494 | int xfrm_state_update(struct xfrm_state *x); | |
1495 | struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, | |
1496 | const xfrm_address_t *daddr, __be32 spi, | |
1497 | u8 proto, unsigned short family); | |
1498 | struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, | |
1499 | const xfrm_address_t *daddr, | |
1500 | const xfrm_address_t *saddr, | |
1501 | u8 proto, | |
1502 | unsigned short family); | |
41a49cc3 | 1503 | #ifdef CONFIG_XFRM_SUB_POLICY |
3aaf3915 | 1504 | void xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, |
d511337a | 1505 | unsigned short family); |
3aaf3915 FW |
1506 | void xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, |
1507 | unsigned short family); | |
41a49cc3 | 1508 | #else |
3aaf3915 FW |
1509 | static inline void xfrm_tmpl_sort(struct xfrm_tmpl **d, struct xfrm_tmpl **s, |
1510 | int n, unsigned short family) | |
41a49cc3 | 1511 | { |
41a49cc3 MN |
1512 | } |
1513 | ||
3aaf3915 FW |
1514 | static inline void xfrm_state_sort(struct xfrm_state **d, struct xfrm_state **s, |
1515 | int n, unsigned short family) | |
41a49cc3 | 1516 | { |
41a49cc3 MN |
1517 | } |
1518 | #endif | |
af11e316 JHS |
1519 | |
1520 | struct xfrmk_sadinfo { | |
1521 | u32 sadhcnt; /* current hash bkts */ | |
1522 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1523 | u32 sadcnt; /* current running count */ | |
1524 | }; | |
1525 | ||
5a6d3416 JHS |
1526 | struct xfrmk_spdinfo { |
1527 | u32 incnt; | |
1528 | u32 outcnt; | |
1529 | u32 fwdcnt; | |
1530 | u32 inscnt; | |
1531 | u32 outscnt; | |
1532 | u32 fwdscnt; | |
1533 | u32 spdhcnt; | |
1534 | u32 spdhmcnt; | |
1535 | }; | |
1536 | ||
d511337a JP |
1537 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1538 | int xfrm_state_delete(struct xfrm_state *x); | |
f75a2804 | 1539 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync); |
d77e38e6 | 1540 | int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid); |
d511337a JP |
1541 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); |
1542 | void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); | |
1543 | u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); | |
1544 | int xfrm_init_replay(struct xfrm_state *x); | |
c7b37c76 | 1545 | u32 xfrm_state_mtu(struct xfrm_state *x, int mtu); |
ffdb5211 | 1546 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload); |
d511337a | 1547 | int xfrm_init_state(struct xfrm_state *x); |
d511337a JP |
1548 | int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); |
1549 | int xfrm_input_resume(struct sk_buff *skb, int nexthdr); | |
7b380192 SD |
1550 | int xfrm_trans_queue_net(struct net *net, struct sk_buff *skb, |
1551 | int (*finish)(struct net *, struct sock *, | |
1552 | struct sk_buff *)); | |
acf568ee HX |
1553 | int xfrm_trans_queue(struct sk_buff *skb, |
1554 | int (*finish)(struct net *, struct sock *, | |
1555 | struct sk_buff *)); | |
d511337a | 1556 | int xfrm_output_resume(struct sk_buff *skb, int err); |
7026b1dd | 1557 | int xfrm_output(struct sock *sk, struct sk_buff *skb); |
0c620e97 FW |
1558 | |
1559 | #if IS_ENABLED(CONFIG_NET_PKTGEN) | |
1560 | int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb); | |
1561 | #endif | |
1562 | ||
d511337a | 1563 | void xfrm_local_error(struct sk_buff *skb, int mtu); |
d511337a JP |
1564 | int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
1565 | int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1566 | int encap_type); | |
1567 | int xfrm4_transport_finish(struct sk_buff *skb, int async); | |
1568 | int xfrm4_rcv(struct sk_buff *skb); | |
1e295370 | 1569 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); |
c4541b41 HX |
1570 | |
1571 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1572 | { | |
70be6c91 | 1573 | XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; |
3328715e SK |
1574 | XFRM_SPI_SKB_CB(skb)->family = AF_INET; |
1575 | XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); | |
1576 | return xfrm_input(skb, nexthdr, spi, 0); | |
c4541b41 HX |
1577 | } |
1578 | ||
ede2059d | 1579 | int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
7026b1dd | 1580 | int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb); |
3328715e SK |
1581 | int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); |
1582 | int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol); | |
d511337a JP |
1583 | int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1584 | int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
d511337a | 1585 | void xfrm4_local_error(struct sk_buff *skb, u32 mtu); |
d511337a | 1586 | int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
63c43787 ND |
1587 | int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi, |
1588 | struct ip6_tnl *t); | |
0146dca7 SD |
1589 | int xfrm6_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
1590 | int encap_type); | |
d511337a | 1591 | int xfrm6_transport_finish(struct sk_buff *skb, int async); |
63c43787 | 1592 | int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t); |
d511337a JP |
1593 | int xfrm6_rcv(struct sk_buff *skb); |
1594 | int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, | |
1595 | xfrm_address_t *saddr, u8 proto); | |
7b77d161 | 1596 | void xfrm6_local_error(struct sk_buff *skb, u32 mtu); |
7e14ea15 SK |
1597 | int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol); |
1598 | int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol); | |
d511337a | 1599 | int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
7b77d161 | 1600 | int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); |
d511337a JP |
1601 | __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
1602 | __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); | |
ede2059d | 1603 | int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
7026b1dd | 1604 | int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb); |
d511337a JP |
1605 | int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
1606 | u8 **prevhdr); | |
1da177e4 LT |
1607 | |
1608 | #ifdef CONFIG_XFRM | |
3e50ddd8 | 1609 | void xfrm6_local_rxpmtu(struct sk_buff *skb, u32 mtu); |
d511337a | 1610 | int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
0146dca7 | 1611 | int xfrm6_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
d511337a JP |
1612 | int xfrm_user_policy(struct sock *sk, int optname, |
1613 | u8 __user *optval, int optlen); | |
1da177e4 LT |
1614 | #else |
1615 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1616 | { | |
1617 | return -ENOPROTOOPT; | |
82695b30 | 1618 | } |
1da177e4 LT |
1619 | #endif |
1620 | ||
d77e38e6 SK |
1621 | struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif, |
1622 | const xfrm_address_t *saddr, | |
1623 | const xfrm_address_t *daddr, | |
077fbac4 | 1624 | int family, u32 mark); |
d77e38e6 | 1625 | |
0331b1f3 | 1626 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
4c563f76 | 1627 | |
d511337a JP |
1628 | void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
1629 | int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, | |
1630 | int (*func)(struct xfrm_policy *, int, int, void*), | |
1631 | void *); | |
283bc9f3 | 1632 | void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); |
1da177e4 | 1633 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
7e652640 | 1634 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, u32 if_id, |
8ca2e93b | 1635 | u8 type, int dir, |
4e81bb83 | 1636 | struct xfrm_selector *sel, |
ef41aaa0 EP |
1637 | struct xfrm_sec_ctx *ctx, int delete, |
1638 | int *err); | |
7e652640 SK |
1639 | struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u32 if_id, u8, |
1640 | int dir, u32 id, int delete, int *err); | |
2e71029e | 1641 | int xfrm_policy_flush(struct net *net, u8 type, bool task_valid); |
880a6fab | 1642 | void xfrm_policy_hash_rebuild(struct net *net); |
1da177e4 | 1643 | u32 xfrm_get_acqseq(void); |
776e9dd9 | 1644 | int verify_spi_info(u8 proto, u32 min, u32 max); |
d511337a | 1645 | int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
e473fcb4 | 1646 | struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, |
7e652640 | 1647 | u8 mode, u32 reqid, u32 if_id, u8 proto, |
a70486f0 DM |
1648 | const xfrm_address_t *daddr, |
1649 | const xfrm_address_t *saddr, int create, | |
bd55775c | 1650 | unsigned short family); |
d511337a | 1651 | int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
1da177e4 | 1652 | |
80c9abaa | 1653 | #ifdef CONFIG_XFRM_MIGRATE |
d511337a JP |
1654 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1655 | const struct xfrm_migrate *m, int num_bundles, | |
8bafd730 AA |
1656 | const struct xfrm_kmaddress *k, |
1657 | const struct xfrm_encap_tmpl *encap); | |
283bc9f3 | 1658 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net); |
d511337a | 1659 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
4ab47d47 AA |
1660 | struct xfrm_migrate *m, |
1661 | struct xfrm_encap_tmpl *encap); | |
d511337a JP |
1662 | int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1663 | struct xfrm_migrate *m, int num_bundles, | |
4ab47d47 AA |
1664 | struct xfrm_kmaddress *k, struct net *net, |
1665 | struct xfrm_encap_tmpl *encap); | |
80c9abaa SS |
1666 | #endif |
1667 | ||
d511337a JP |
1668 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
1669 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); | |
1670 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, | |
1671 | xfrm_address_t *addr); | |
1672 | ||
1673 | void xfrm_input_init(void); | |
1674 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); | |
1675 | ||
1676 | void xfrm_probe_algs(void); | |
1677 | int xfrm_count_pfkey_auth_supported(void); | |
1678 | int xfrm_count_pfkey_enc_supported(void); | |
1679 | struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1680 | struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1681 | struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1682 | struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1683 | struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1684 | struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); | |
1685 | struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); | |
1686 | struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); | |
1687 | struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, | |
1688 | int probe); | |
1da177e4 | 1689 | |
70e94e66 YH |
1690 | static inline bool xfrm6_addr_equal(const xfrm_address_t *a, |
1691 | const xfrm_address_t *b) | |
1692 | { | |
1693 | return ipv6_addr_equal((const struct in6_addr *)a, | |
1694 | (const struct in6_addr *)b); | |
1695 | } | |
1696 | ||
1697 | static inline bool xfrm_addr_equal(const xfrm_address_t *a, | |
1698 | const xfrm_address_t *b, | |
1699 | sa_family_t family) | |
1da177e4 LT |
1700 | { |
1701 | switch (family) { | |
1702 | default: | |
1703 | case AF_INET: | |
70e94e66 | 1704 | return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; |
1da177e4 | 1705 | case AF_INET6: |
70e94e66 | 1706 | return xfrm6_addr_equal(a, b); |
1da177e4 LT |
1707 | } |
1708 | } | |
1709 | ||
77d8d7a6 HX |
1710 | static inline int xfrm_policy_id2dir(u32 index) |
1711 | { | |
1712 | return index & 7; | |
1713 | } | |
1714 | ||
a6483b79 AD |
1715 | #ifdef CONFIG_XFRM |
1716 | static inline int xfrm_aevent_is_on(struct net *net) | |
f8cd5488 | 1717 | { |
be33690d PM |
1718 | struct sock *nlsk; |
1719 | int ret = 0; | |
1720 | ||
1721 | rcu_read_lock(); | |
a6483b79 | 1722 | nlsk = rcu_dereference(net->xfrm.nlsk); |
be33690d PM |
1723 | if (nlsk) |
1724 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1725 | rcu_read_unlock(); | |
1726 | return ret; | |
f8cd5488 | 1727 | } |
0f24558e HG |
1728 | |
1729 | static inline int xfrm_acquire_is_on(struct net *net) | |
1730 | { | |
1731 | struct sock *nlsk; | |
1732 | int ret = 0; | |
1733 | ||
1734 | rcu_read_lock(); | |
1735 | nlsk = rcu_dereference(net->xfrm.nlsk); | |
1736 | if (nlsk) | |
1737 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE); | |
1738 | rcu_read_unlock(); | |
1739 | ||
1740 | return ret; | |
1741 | } | |
a6483b79 | 1742 | #endif |
f8cd5488 | 1743 | |
373b8eeb | 1744 | static inline unsigned int aead_len(struct xfrm_algo_aead *alg) |
ee5c2317 SK |
1745 | { |
1746 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1747 | } | |
1748 | ||
06cd22f8 | 1749 | static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg) |
0f99be0d ED |
1750 | { |
1751 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1752 | } | |
1753 | ||
1bd963a7 | 1754 | static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) |
4447bb33 MW |
1755 | { |
1756 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1757 | } | |
1758 | ||
5e708e47 | 1759 | static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) |
9736acf3 SK |
1760 | { |
1761 | return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); | |
1762 | } | |
1763 | ||
80c9abaa | 1764 | #ifdef CONFIG_XFRM_MIGRATE |
af2f464e SK |
1765 | static inline int xfrm_replay_clone(struct xfrm_state *x, |
1766 | struct xfrm_state *orig) | |
1767 | { | |
1768 | x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), | |
1769 | GFP_KERNEL); | |
1770 | if (!x->replay_esn) | |
1771 | return -ENOMEM; | |
1772 | ||
1773 | x->replay_esn->bmp_len = orig->replay_esn->bmp_len; | |
1774 | x->replay_esn->replay_window = orig->replay_esn->replay_window; | |
1775 | ||
1776 | x->preplay_esn = kmemdup(x->replay_esn, | |
1777 | xfrm_replay_state_esn_len(x->replay_esn), | |
1778 | GFP_KERNEL); | |
1779 | if (!x->preplay_esn) { | |
1780 | kfree(x->replay_esn); | |
1781 | return -ENOMEM; | |
1782 | } | |
1783 | ||
1784 | return 0; | |
1785 | } | |
1786 | ||
ee5c2317 SK |
1787 | static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig) |
1788 | { | |
1789 | return kmemdup(orig, aead_len(orig), GFP_KERNEL); | |
1790 | } | |
1791 | ||
1792 | ||
80c9abaa SS |
1793 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
1794 | { | |
0f99be0d | 1795 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
80c9abaa SS |
1796 | } |
1797 | ||
4447bb33 MW |
1798 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
1799 | { | |
1800 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); | |
1801 | } | |
1802 | ||
80c9abaa SS |
1803 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
1804 | { | |
1805 | int i; | |
1806 | for (i = 0; i < n; i++) | |
1807 | xfrm_state_put(*(states + i)); | |
1808 | } | |
1809 | ||
1810 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1811 | { | |
1812 | int i; | |
1813 | for (i = 0; i < n; i++) | |
1814 | xfrm_state_delete(*(states + i)); | |
1815 | } | |
1816 | #endif | |
f8cd5488 | 1817 | |
def8b4fa | 1818 | #ifdef CONFIG_XFRM |
00501121 HX |
1819 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
1820 | { | |
2294be0f FW |
1821 | struct sec_path *sp = skb_sec_path(skb); |
1822 | ||
1823 | return sp->xvec[sp->len - 1]; | |
00501121 | 1824 | } |
f53c7239 SK |
1825 | #endif |
1826 | ||
54ef207a SK |
1827 | static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb) |
1828 | { | |
f53c7239 | 1829 | #ifdef CONFIG_XFRM |
2294be0f | 1830 | struct sec_path *sp = skb_sec_path(skb); |
54ef207a SK |
1831 | |
1832 | if (!sp || !sp->olen || sp->len != sp->olen) | |
1833 | return NULL; | |
1834 | ||
1835 | return &sp->ovec[sp->olen - 1]; | |
f53c7239 SK |
1836 | #else |
1837 | return NULL; | |
def8b4fa | 1838 | #endif |
f53c7239 | 1839 | } |
00501121 | 1840 | |
e9a441b6 | 1841 | void __init xfrm_dev_init(void); |
b81f884a HL |
1842 | |
1843 | #ifdef CONFIG_XFRM_OFFLOAD | |
f53c7239 SK |
1844 | void xfrm_dev_resume(struct sk_buff *skb); |
1845 | void xfrm_dev_backlog(struct softnet_data *sd); | |
1846 | struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again); | |
d77e38e6 SK |
1847 | int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, |
1848 | struct xfrm_user_offload *xuo); | |
1849 | bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x); | |
1850 | ||
50bd870a YE |
1851 | static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x) |
1852 | { | |
1853 | struct xfrm_state_offload *xso = &x->xso; | |
1854 | ||
1855 | if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn) | |
1856 | xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x); | |
1857 | } | |
1858 | ||
f70f250a SK |
1859 | static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) |
1860 | { | |
1861 | struct xfrm_state *x = dst->xfrm; | |
b6ca8bd5 | 1862 | struct xfrm_dst *xdst; |
f70f250a SK |
1863 | |
1864 | if (!x || !x->type_offload) | |
1865 | return false; | |
1866 | ||
b6ca8bd5 | 1867 | xdst = (struct xfrm_dst *) dst; |
2271d519 SK |
1868 | if (!x->xso.offload_handle && !xdst->child->xfrm) |
1869 | return true; | |
0f6c480f | 1870 | if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) && |
b6ca8bd5 | 1871 | !xdst->child->xfrm) |
f70f250a SK |
1872 | return true; |
1873 | ||
1874 | return false; | |
1875 | } | |
1876 | ||
d77e38e6 SK |
1877 | static inline void xfrm_dev_state_delete(struct xfrm_state *x) |
1878 | { | |
1879 | struct xfrm_state_offload *xso = &x->xso; | |
1880 | ||
1881 | if (xso->dev) | |
1882 | xso->dev->xfrmdev_ops->xdo_dev_state_delete(x); | |
1883 | } | |
1884 | ||
1885 | static inline void xfrm_dev_state_free(struct xfrm_state *x) | |
1886 | { | |
1887 | struct xfrm_state_offload *xso = &x->xso; | |
77990464 | 1888 | struct net_device *dev = xso->dev; |
d77e38e6 SK |
1889 | |
1890 | if (dev && dev->xfrmdev_ops) { | |
7f05b467 SN |
1891 | if (dev->xfrmdev_ops->xdo_dev_state_free) |
1892 | dev->xfrmdev_ops->xdo_dev_state_free(x); | |
d77e38e6 SK |
1893 | xso->dev = NULL; |
1894 | dev_put(dev); | |
1895 | } | |
1896 | } | |
1897 | #else | |
f53c7239 SK |
1898 | static inline void xfrm_dev_resume(struct sk_buff *skb) |
1899 | { | |
1900 | } | |
1901 | ||
1902 | static inline void xfrm_dev_backlog(struct softnet_data *sd) | |
1903 | { | |
1904 | } | |
1905 | ||
1906 | static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again) | |
f6e27114 | 1907 | { |
3dca3f38 | 1908 | return skb; |
f6e27114 SK |
1909 | } |
1910 | ||
d77e38e6 SK |
1911 | static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo) |
1912 | { | |
1913 | return 0; | |
1914 | } | |
1915 | ||
1916 | static inline void xfrm_dev_state_delete(struct xfrm_state *x) | |
1917 | { | |
1918 | } | |
1919 | ||
1920 | static inline void xfrm_dev_state_free(struct xfrm_state *x) | |
1921 | { | |
1922 | } | |
1923 | ||
1924 | static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x) | |
1925 | { | |
1926 | return false; | |
1927 | } | |
f70f250a | 1928 | |
50bd870a YE |
1929 | static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x) |
1930 | { | |
1931 | } | |
1932 | ||
f70f250a SK |
1933 | static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) |
1934 | { | |
1935 | return false; | |
1936 | } | |
d77e38e6 SK |
1937 | #endif |
1938 | ||
bf825f81 JHS |
1939 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
1940 | { | |
1941 | if (attrs[XFRMA_MARK]) | |
4efd7e83 | 1942 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
bf825f81 JHS |
1943 | else |
1944 | m->v = m->m = 0; | |
1945 | ||
1946 | return m->v & m->m; | |
1947 | } | |
1948 | ||
e3dfa389 | 1949 | static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) |
bf825f81 | 1950 | { |
1d1e34dd | 1951 | int ret = 0; |
bf825f81 | 1952 | |
1d1e34dd DM |
1953 | if (m->m | m->v) |
1954 | ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); | |
1955 | return ret; | |
bf825f81 JHS |
1956 | } |
1957 | ||
9b42c1f1 SK |
1958 | static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x) |
1959 | { | |
1960 | struct xfrm_mark *m = &x->props.smark; | |
1961 | ||
1962 | return (m->v & m->m) | (mark & ~m->m); | |
1963 | } | |
1964 | ||
7e652640 SK |
1965 | static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id) |
1966 | { | |
1967 | int ret = 0; | |
1968 | ||
1969 | if (if_id) | |
1970 | ret = nla_put_u32(skb, XFRMA_IF_ID, if_id); | |
1971 | return ret; | |
1972 | } | |
1973 | ||
70be6c91 SK |
1974 | static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, |
1975 | unsigned int family) | |
1976 | { | |
1977 | bool tunnel = false; | |
1978 | ||
1979 | switch(family) { | |
1980 | case AF_INET: | |
1981 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) | |
1982 | tunnel = true; | |
1983 | break; | |
1984 | case AF_INET6: | |
1985 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) | |
1986 | tunnel = true; | |
1987 | break; | |
1988 | } | |
c9500d7b | 1989 | if (tunnel && !(x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL)) |
70be6c91 SK |
1990 | return -EINVAL; |
1991 | ||
1992 | return 0; | |
1993 | } | |
ede64dd2 FW |
1994 | |
1995 | #if IS_ENABLED(CONFIG_IPV6) | |
1996 | static inline bool xfrm6_local_dontfrag(const struct sock *sk) | |
1997 | { | |
1998 | int proto; | |
1999 | ||
2000 | if (!sk || sk->sk_family != AF_INET6) | |
2001 | return false; | |
2002 | ||
2003 | proto = sk->sk_protocol; | |
2004 | if (proto == IPPROTO_UDP || proto == IPPROTO_RAW) | |
2005 | return inet6_sk(sk)->dontfrag; | |
2006 | ||
2007 | return false; | |
2008 | } | |
2009 | #endif | |
1da177e4 | 2010 | #endif /* _NET_XFRM_H */ |