blob: b22db30c3d887818fdd20657ef073760f902aa83 [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001/* SPDX-License-Identifier: GPL-2.0 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002#ifndef _NET_XFRM_H
3#define _NET_XFRM_H
4
Herbert Xuaabc9762005-05-03 16:27:10 -07005#include <linux/compiler.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07006#include <linux/xfrm.h>
7#include <linux/spinlock.h>
8#include <linux/list.h>
9#include <linux/skbuff.h>
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020010#include <linux/socket.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include <linux/pfkeyv2.h>
Masahide NAKAMURA57947082006-09-22 15:06:24 -070012#include <linux/ipsec.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/in6.h>
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -080014#include <linux/mutex.h>
Joy Lattenab5f5e82007-09-17 11:51:22 -070015#include <linux/audit.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090016#include <linux/slab.h>
Reshetova, Elena88755e9c2017-07-04 15:53:21 +030017#include <linux/refcount.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
19#include <net/sock.h>
20#include <net/dst.h>
Herbert Xu436a0a42007-10-08 17:25:53 -070021#include <net/ip.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <net/route.h>
23#include <net/ipv6.h>
24#include <net/ip6_fib.h>
Timo Teräsfe1a5f02010-04-07 00:30:04 +000025#include <net/flow.h>
Steffen Klassertf203b762018-06-12 14:07:12 +020026#include <net/gro_cells.h>
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -080027
28#include <linux/interrupt.h>
29
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -080030#ifdef CONFIG_XFRM_STATISTICS
31#include <net/snmp.h>
32#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
Masahide NAKAMURAd3d6dd32007-06-26 23:57:49 -070034#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
Nicolas Dichtelfa9921e2011-02-02 06:29:02 +000042#define XFRM_ALIGN4(len) (((len) + 3) & ~3)
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#define XFRM_ALIGN8(len) (((len) + 7) & ~7)
Herbert Xub59f45d2006-05-27 23:05:54 -070044#define MODULE_ALIAS_XFRM_MODE(family, encap) \
45 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
Masahide NAKAMURAd3d6dd32007-06-26 23:57:49 -070046#define MODULE_ALIAS_XFRM_TYPE(family, proto) \
47 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
Ilan Tayariffdb5212017-08-01 12:49:08 +030048#define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \
49 MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto))
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -080051#ifdef CONFIG_XFRM_STATISTICS
Alexey Dobriyan59c99402008-11-25 17:59:52 -080052#define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -080053#else
Alexey Dobriyan59c99402008-11-25 17:59:52 -080054#define XFRM_INC_STATS(net, field) ((void)(net))
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -080055#endif
56
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
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
Herbert Xu12a169e2008-10-01 07:03:24 -0700119struct xfrm_state_walk {
120 struct list_head all;
121 u8 state;
Nicolas Dichteld3623092014-02-14 15:30:36 +0100122 u8 dying;
123 u8 proto;
Herbert Xu12a169e2008-10-01 07:03:24 -0700124 u32 seq;
Nicolas Dichtel870a2df2014-03-06 18:24:29 +0100125 struct xfrm_address_filter *filter;
Herbert Xu12a169e2008-10-01 07:03:24 -0700126};
127
Steffen Klassertd77e38e2017-04-14 10:06:10 +0200128struct xfrm_state_offload {
129 struct net_device *dev;
130 unsigned long offload_handle;
131 unsigned int num_exthdrs;
132 u8 flags;
133};
134
Florian Westphalc9500d72019-03-29 21:16:32 +0100135struct xfrm_mode {
136 u8 encap;
137 u8 family;
138 u8 flags;
139};
140
141/* Flags for xfrm_mode. */
142enum {
143 XFRM_MODE_FLAG_TUNNEL = 1,
144};
145
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146/* Full description of state of transformer. */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000147struct xfrm_state {
Eric W. Biederman0c5c9fb2015-03-11 23:06:44 -0500148 possible_net_t xs_net;
Herbert Xuabb81c42008-09-09 19:58:29 -0700149 union {
Herbert Xu12a169e2008-10-01 07:03:24 -0700150 struct hlist_node gclist;
Herbert Xuabb81c42008-09-09 19:58:29 -0700151 struct hlist_node bydst;
152 };
David S. Miller8f126e32006-08-24 02:45:07 -0700153 struct hlist_node bysrc;
154 struct hlist_node byspi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
Reshetova, Elena88755e9c2017-07-04 15:53:21 +0300156 refcount_t refcnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 spinlock_t lock;
158
159 struct xfrm_id id;
160 struct xfrm_selector sel;
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +0000161 struct xfrm_mark mark;
Steffen Klassert7e652642018-06-12 14:07:07 +0200162 u32 if_id;
Martin Willi35d28562010-12-08 04:37:49 +0000163 u32 tfcpad;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
David S. Miller9d4a7062006-08-24 03:18:09 -0700165 u32 genid;
166
Herbert Xu12a169e2008-10-01 07:03:24 -0700167 /* Key manager bits */
168 struct xfrm_state_walk km;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
170 /* Parameters of this state. */
171 struct {
172 u32 reqid;
173 u8 mode;
174 u8 replay_window;
175 u8 aalgo, ealgo, calgo;
176 u8 flags;
177 u16 family;
178 xfrm_address_t saddr;
179 int header_len;
180 int trailer_len;
Nicolas Dichtela947b0a2013-02-22 10:54:54 +0100181 u32 extra_flags;
Steffen Klassert9b42c1f2018-06-12 12:44:26 +0200182 struct xfrm_mark smark;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 } props;
184
185 struct xfrm_lifetime_cfg lft;
186
187 /* Data for transformer */
Martin Willi4447bb32009-11-25 00:29:52 +0000188 struct xfrm_algo_auth *aalg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 struct xfrm_algo *ealg;
190 struct xfrm_algo *calg;
Herbert Xu1a6509d2008-01-28 19:37:29 -0800191 struct xfrm_algo_aead *aead;
Herbert Xu69b01372015-05-27 16:03:45 +0800192 const char *geniv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193
194 /* Data for encapsulator */
195 struct xfrm_encap_tmpl *encap;
196
Noriaki TAKAMIYA060f02a2006-08-23 18:18:55 -0700197 /* Data for care-of address */
198 xfrm_address_t *coaddr;
199
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
201 struct xfrm_state *tunnel;
202
203 /* If a tunnel, number of users + 1 */
204 atomic_t tunnel_users;
205
206 /* State for replay detection */
207 struct xfrm_replay_state replay;
Steffen Klassert9736acf2011-03-08 00:05:43 +0000208 struct xfrm_replay_state_esn *replay_esn;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800210 /* Replay detection state at the time we sent the last notification */
211 struct xfrm_replay_state preplay;
Steffen Klassert9736acf2011-03-08 00:05:43 +0000212 struct xfrm_replay_state_esn *preplay_esn;
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800213
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000214 /* The functions for replay detection. */
Julia Lawalle45a8a92016-08-09 18:27:08 +0200215 const struct xfrm_replay *repl;
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000216
Jamal Hadi Salim27170962006-04-14 15:03:05 -0700217 /* internal flag that only holds state for delayed aevent at the
218 * moment
219 */
220 u32 xflags;
221
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800222 /* Replay detection notification settings */
223 u32 replay_maxage;
224 u32 replay_maxdiff;
225
226 /* Replay detection notification timer */
227 struct timer_list rtimer;
228
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 /* Statistics */
230 struct xfrm_stats stats;
231
232 struct xfrm_lifetime_cur curlft;
Thomas Gleixner671422b2019-03-01 23:48:20 +0100233 struct hrtimer mtimer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
Steffen Klassertd77e38e2017-04-14 10:06:10 +0200235 struct xfrm_state_offload xso;
236
Fan Due3c0d042012-07-30 21:43:54 +0000237 /* used to fix curlft->add_time when changing date */
238 long saved_tmo;
239
Masahide NAKAMURA9afaca02006-08-23 18:20:16 -0700240 /* Last used time */
Arnd Bergmann03dc7a32018-07-11 12:19:14 +0200241 time64_t lastused;
Masahide NAKAMURA9afaca02006-08-23 18:20:16 -0700242
Steffen Klassertcac26612017-01-17 10:22:57 +0100243 struct page_frag xfrag;
244
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 /* Reference to data common to all the instances of this
246 * transformer. */
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800247 const struct xfrm_type *type;
Florian Westphalc9500d72019-03-29 21:16:32 +0100248 struct xfrm_mode inner_mode;
249 struct xfrm_mode inner_mode_iaf;
250 struct xfrm_mode outer_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
Steffen Klassert9d389d72017-04-14 10:05:44 +0200252 const struct xfrm_type_offload *type_offload;
253
Trent Jaegerdf718372005-12-13 23:12:27 -0800254 /* Security context */
255 struct xfrm_sec_ctx *security;
256
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 /* Private data of this transformer, format is opaque,
258 * interpreted by xfrm_type methods. */
259 void *data;
260};
261
Alexey Dobriyan673c09be2008-11-25 17:15:16 -0800262static inline struct net *xs_net(struct xfrm_state *x)
263{
264 return read_pnet(&x->xs_net);
265}
266
Jamal Hadi Salim27170962006-04-14 15:03:05 -0700267/* xflags - make enum if more show up */
268#define XFRM_TIME_DEFER 1
Fan Due3c0d042012-07-30 21:43:54 +0000269#define XFRM_SOFT_EXPIRE 2
Jamal Hadi Salim27170962006-04-14 15:03:05 -0700270
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271enum {
272 XFRM_STATE_VOID,
273 XFRM_STATE_ACQ,
274 XFRM_STATE_VALID,
275 XFRM_STATE_ERROR,
276 XFRM_STATE_EXPIRED,
277 XFRM_STATE_DEAD
278};
279
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700280/* callback structure passed from either netlink or pfkey */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000281struct km_event {
Herbert Xubf08867f92005-06-18 22:44:00 -0700282 union {
283 u32 hard;
284 u32 proto;
285 u32 byid;
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800286 u32 aevent;
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -0700287 u32 type;
Herbert Xubf08867f92005-06-18 22:44:00 -0700288 } data;
289
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700290 u32 seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +0000291 u32 portid;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700292 u32 event;
Alexey Dobriyan70678022008-11-25 17:50:36 -0800293 struct net *net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700294};
295
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000296struct xfrm_replay {
297 void (*advance)(struct xfrm_state *x, __be32 net_seq);
298 int (*check)(struct xfrm_state *x,
299 struct sk_buff *skb,
300 __be32 net_seq);
Steffen Klassert3b59df42012-09-04 00:03:29 +0000301 int (*recheck)(struct xfrm_state *x,
302 struct sk_buff *skb,
303 __be32 net_seq);
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000304 void (*notify)(struct xfrm_state *x, int event);
305 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
306};
307
Steffen Klassertf203b762018-06-12 14:07:12 +0200308struct xfrm_if_cb {
Martin Willi025c65e2019-03-26 13:20:43 +0100309 struct xfrm_if *(*decode_session)(struct sk_buff *skb,
310 unsigned short family);
Steffen Klassertf203b762018-06-12 14:07:12 +0200311};
312
313void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb);
314void xfrm_if_unregister_cb(void);
315
Herbert Xu25ee3282007-12-11 09:32:34 -0800316struct net_device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317struct xfrm_type;
318struct xfrm_dst;
319struct xfrm_policy_afinfo {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 struct dst_ops *dst_ops;
David Ahern42a7b322015-08-10 16:58:11 -0600321 struct dst_entry *(*dst_lookup)(struct net *net,
322 int tos, int oif,
David S. Miller5e6b9302011-02-24 00:14:45 -0500323 const xfrm_address_t *saddr,
Lorenzo Colitti077fbac2017-08-11 02:11:33 +0900324 const xfrm_address_t *daddr,
325 u32 mark);
David Ahern42a7b322015-08-10 16:58:11 -0600326 int (*get_saddr)(struct net *net, int oif,
327 xfrm_address_t *saddr,
Lorenzo Colitti077fbac2017-08-11 02:11:33 +0900328 xfrm_address_t *daddr,
329 u32 mark);
Herbert Xu25ee3282007-12-11 09:32:34 -0800330 int (*fill_dst)(struct xfrm_dst *xdst,
Herbert Xu87c1e122010-03-02 02:51:56 +0000331 struct net_device *dev,
David S. Miller0c7b3ee2011-02-22 17:48:57 -0800332 const struct flowi *fl);
David S. Miller2774c132011-03-01 14:59:04 -0800333 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334};
335
Florian Westphala2817d82017-02-07 15:00:17 +0100336int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family);
337void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo);
Joe Perchesd5113372013-09-23 11:33:53 -0700338void km_policy_notify(struct xfrm_policy *xp, int dir,
339 const struct km_event *c);
340void km_state_notify(struct xfrm_state *x, const struct km_event *c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
342struct xfrm_tmpl;
Joe Perchesd5113372013-09-23 11:33:53 -0700343int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
344 struct xfrm_policy *pol);
345void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
346int __xfrm_state_delete(struct xfrm_state *x);
Jamal Hadi Salim53bc6b4d2006-03-20 19:17:03 -0800347
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348struct xfrm_state_afinfo {
Florian Westphal4c203b02019-05-03 17:46:18 +0200349 u8 family;
350 u8 proto;
Florian Westphal4f518e82019-05-03 17:46:19 +0200351
352 const struct xfrm_type_offload *type_offload_esp;
353
354 const struct xfrm_type *type_esp;
355 const struct xfrm_type *type_ipip;
356 const struct xfrm_type *type_ipip6;
357 const struct xfrm_type *type_comp;
358 const struct xfrm_type *type_ah;
359 const struct xfrm_type *type_routing;
360 const struct xfrm_type *type_dstopts;
Steffen Klassert9d389d72017-04-14 10:05:44 +0200361
Eric W. Biedermanede20592015-10-07 16:48:47 -0500362 int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
David Miller7026b1d2015-04-05 22:19:04 -0400363 int (*output_finish)(struct sock *sk, struct sk_buff *skb);
Herbert Xu227620e2007-11-13 21:41:28 -0800364 int (*extract_input)(struct xfrm_state *x,
365 struct sk_buff *skb);
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800366 int (*extract_output)(struct xfrm_state *x,
367 struct sk_buff *skb);
Herbert Xu716062f2007-11-13 21:44:23 -0800368 int (*transport_finish)(struct sk_buff *skb,
369 int async);
Hannes Frederic Sowa628e3412013-08-14 13:05:23 +0200370 void (*local_error)(struct sk_buff *skb, u32 mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371};
372
Joe Perchesd5113372013-09-23 11:33:53 -0700373int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
374int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
375struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
Florian Westphal711059b2017-01-09 14:20:48 +0100376struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
Steffen Klassert2f32b512014-03-14 07:28:07 +0100378struct xfrm_input_afinfo {
379 unsigned int family;
Steffen Klassert2f32b512014-03-14 07:28:07 +0100380 int (*callback)(struct sk_buff *skb, u8 protocol,
381 int err);
382};
383
Florian Westphal960fdfd2017-02-07 14:52:30 +0100384int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo);
385int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo);
Steffen Klassert2f32b512014-03-14 07:28:07 +0100386
Steffen Klassertb48c05a2018-04-16 07:50:09 +0200387void xfrm_flush_gc(void);
Joe Perchesd5113372013-09-23 11:33:53 -0700388void xfrm_state_delete_tunnel(struct xfrm_state *x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000390struct xfrm_type {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 char *description;
392 struct module *owner;
jamala6337462010-02-09 13:21:17 +0000393 u8 proto;
394 u8 flags;
Masahide NAKAMURA1b5c2292006-08-23 18:11:50 -0700395#define XFRM_TYPE_NON_FRAGMENT 1
Herbert Xu436a0a42007-10-08 17:25:53 -0700396#define XFRM_TYPE_REPLAY_PROT 2
Herbert Xuf04e7e82007-11-13 21:36:51 -0800397#define XFRM_TYPE_LOCAL_COADDR 4
398#define XFRM_TYPE_REMOTE_COADDR 8
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399
Herbert Xu72cb6962005-06-20 13:18:08 -0700400 int (*init_state)(struct xfrm_state *x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 void (*destructor)(struct xfrm_state *);
Herbert Xue6956332006-04-01 00:52:46 -0800402 int (*input)(struct xfrm_state *, struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
David S. Miller8f029de2011-02-22 17:59:59 -0800404 int (*reject)(struct xfrm_state *, struct sk_buff *,
405 const struct flowi *);
Masahide NAKAMURAaee5adb2006-08-23 17:57:28 -0700406 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407};
408
Joe Perchesd5113372013-09-23 11:33:53 -0700409int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
Florian Westphal4f518e82019-05-03 17:46:19 +0200410void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411
Steffen Klassert9d389d72017-04-14 10:05:44 +0200412struct xfrm_type_offload {
413 char *description;
414 struct module *owner;
415 u8 proto;
416 void (*encap)(struct xfrm_state *, struct sk_buff *pskb);
417 int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb);
418 int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features);
419};
420
421int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family);
Florian Westphal4f518e82019-05-03 17:46:19 +0200422void xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family);
Steffen Klassert9d389d72017-04-14 10:05:44 +0200423
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -0700424static inline int xfrm_af2proto(unsigned int family)
425{
426 switch(family) {
427 case AF_INET:
428 return IPPROTO_IPIP;
429 case AF_INET6:
430 return IPPROTO_IPV6;
431 default:
432 return 0;
433 }
434}
435
Florian Westphal4c145dc2019-03-29 21:16:31 +0100436static inline const struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -0700437{
438 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
439 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
Florian Westphalc9500d72019-03-29 21:16:32 +0100440 return &x->inner_mode;
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -0700441 else
Florian Westphalc9500d72019-03-29 21:16:32 +0100442 return &x->inner_mode_iaf;
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -0700443}
444
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000445struct xfrm_tmpl {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446/* id in template is interpreted as:
447 * daddr - destination of tunnel, may be zero for transport mode.
448 * spi - zero to acquire spi. Not zero if spi is static, then
449 * daddr must be fixed too.
450 * proto - AH/ESP/IPCOMP
451 */
452 struct xfrm_id id;
453
454/* Source address of tunnel. Ignored, if it is not a tunnel. */
455 xfrm_address_t saddr;
456
Miika Komu76b3f052006-11-30 16:40:43 -0800457 unsigned short encap_family;
458
jamala6337462010-02-09 13:21:17 +0000459 u32 reqid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460
Masahide NAKAMURA7e49e6d2006-09-22 15:05:15 -0700461/* Mode: transport, tunnel etc. */
jamala6337462010-02-09 13:21:17 +0000462 u8 mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
464/* Sharing mode: unique, this session only, this user only etc. */
jamala6337462010-02-09 13:21:17 +0000465 u8 share;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466
467/* May skip this transfomration if no SA is found */
jamala6337462010-02-09 13:21:17 +0000468 u8 optional;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469
Herbert Xuc5d18e92008-04-22 00:46:42 -0700470/* Skip aalgos/ealgos/calgos checks. */
jamala6337462010-02-09 13:21:17 +0000471 u8 allalgs;
Herbert Xuc5d18e92008-04-22 00:46:42 -0700472
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473/* Bit mask of algos allowed for acquisition */
jamala6337462010-02-09 13:21:17 +0000474 u32 aalgos;
475 u32 ealgos;
476 u32 calgos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477};
478
Masahide NAKAMURA622dc822006-08-23 17:52:01 -0700479#define XFRM_MAX_DEPTH 6
Steffen Klassert54ef2072017-02-15 09:39:54 +0100480#define XFRM_MAX_OFFLOAD_DEPTH 1
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481
Herbert Xu12a169e2008-10-01 07:03:24 -0700482struct xfrm_policy_walk_entry {
483 struct list_head all;
484 u8 dead;
485};
486
487struct xfrm_policy_walk {
488 struct xfrm_policy_walk_entry walk;
489 u8 type;
490 u32 seq;
491};
492
Steffen Klasserta0073fe2013-02-05 12:52:55 +0100493struct xfrm_policy_queue {
494 struct sk_buff_head hold_queue;
495 struct timer_list hold_timer;
496 unsigned long timeout;
497};
498
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000499struct xfrm_policy {
Eric W. Biederman0c5c9fb2015-03-11 23:06:44 -0500500 possible_net_t xp_net;
David S. Miller2518c7c2006-08-24 04:45:07 -0700501 struct hlist_node bydst;
502 struct hlist_node byidx;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503
504 /* This lock only affects elements except for entry. */
505 rwlock_t lock;
Reshetova, Elena850a6212017-07-04 15:53:22 +0300506 refcount_t refcnt;
Florian Westphal6be3b0d2018-11-07 23:00:37 +0100507 u32 pos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 struct timer_list timer;
509
Timo Teräs80c802f2010-04-07 00:30:05 +0000510 atomic_t genid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 u32 priority;
512 u32 index;
Steffen Klassert7e652642018-06-12 14:07:07 +0200513 u32 if_id;
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +0000514 struct xfrm_mark mark;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 struct xfrm_selector selector;
516 struct xfrm_lifetime_cfg lft;
517 struct xfrm_lifetime_cur curlft;
Herbert Xu12a169e2008-10-01 07:03:24 -0700518 struct xfrm_policy_walk_entry walk;
Steffen Klasserta0073fe2013-02-05 12:52:55 +0100519 struct xfrm_policy_queue polq;
Florian Westphal9cf545e2018-11-07 23:00:38 +0100520 bool bydst_reinsert;
Arnaldo Carvalho de Melo46ca5f52006-11-27 17:58:59 -0200521 u8 type;
522 u8 action;
523 u8 flags;
Arnaldo Carvalho de Melo46ca5f52006-11-27 17:58:59 -0200524 u8 xfrm_nr;
Herbert Xu12a169e2008-10-01 07:03:24 -0700525 u16 family;
Trent Jaegerdf718372005-12-13 23:12:27 -0800526 struct xfrm_sec_ctx *security;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
Florian Westphal24969fa2018-11-07 23:00:35 +0100528 struct hlist_node bydst_inexact_list;
Eric Dumazet56f04732015-12-08 07:22:01 -0800529 struct rcu_head rcu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530};
531
David S. Miller63eb23f2011-02-24 01:25:19 -0500532static inline struct net *xp_net(const struct xfrm_policy *xp)
Alexey Dobriyan0331b1f2008-11-25 17:21:45 -0800533{
534 return read_pnet(&xp->xp_net);
535}
536
Arnaud Ebalard13c1d182008-10-05 13:33:42 -0700537struct xfrm_kmaddress {
538 xfrm_address_t local;
539 xfrm_address_t remote;
540 u32 reserved;
541 u16 family;
542};
543
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -0800544struct xfrm_migrate {
545 xfrm_address_t old_daddr;
546 xfrm_address_t old_saddr;
547 xfrm_address_t new_daddr;
548 xfrm_address_t new_saddr;
549 u8 proto;
550 u8 mode;
551 u16 reserved;
552 u32 reqid;
553 u16 old_family;
554 u16 new_family;
555};
556
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800557#define XFRM_KM_TIMEOUT 30
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800558/* what happened */
559#define XFRM_REPLAY_UPDATE XFRM_AE_CR
560#define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
561
562/* default aevent timeout in units of 100ms */
563#define XFRM_AE_ETIME 10
564/* Async Event timer multiplier */
565#define XFRM_AE_ETH_M 10
566/* default seq threshold size */
567#define XFRM_AE_SEQT_SIZE 2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000569struct xfrm_mgr {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 struct list_head list;
David S. Miller214e0052011-02-24 00:02:38 -0500571 int (*notify)(struct xfrm_state *x, const struct km_event *c);
Fan Du65e07362012-08-15 10:13:47 +0800572 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
Venkat Yekkiralacb969f02006-07-24 23:32:20 -0700573 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
Al Viro5d36b182006-11-08 00:24:06 -0800574 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
David S. Miller214e0052011-02-24 00:02:38 -0500575 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
Alexey Dobriyandb983c12008-11-25 17:51:01 -0800576 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
David S. Miller183cad12011-02-24 00:28:01 -0500577 int (*migrate)(const struct xfrm_selector *sel,
578 u8 dir, u8 type,
579 const struct xfrm_migrate *m,
580 int num_bundles,
Antony Antony8bafd732017-06-06 12:12:14 +0200581 const struct xfrm_kmaddress *k,
582 const struct xfrm_encap_tmpl *encap);
Horia Geanta0f245582014-02-12 16:20:06 +0200583 bool (*is_alive)(const struct km_event *c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584};
585
Joe Perchesd5113372013-09-23 11:33:53 -0700586int xfrm_register_km(struct xfrm_mgr *km);
587int xfrm_unregister_km(struct xfrm_mgr *km);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588
Steffen Klassert70be6c92014-02-21 08:41:09 +0100589struct xfrm_tunnel_skb_cb {
590 union {
591 struct inet_skb_parm h4;
592 struct inet6_skb_parm h6;
593 } header;
594
595 union {
596 struct ip_tunnel *ip4;
597 struct ip6_tnl *ip6;
598 } tunnel;
599};
600
601#define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
602
Herbert Xu436a0a42007-10-08 17:25:53 -0700603/*
604 * This structure is used for the duration where packets are being
605 * transformed by IPsec. As soon as the packet leaves IPsec the
606 * area beyond the generic IP part may be overwritten.
607 */
608struct xfrm_skb_cb {
Steffen Klassert70be6c92014-02-21 08:41:09 +0100609 struct xfrm_tunnel_skb_cb header;
Herbert Xu436a0a42007-10-08 17:25:53 -0700610
611 /* Sequence number for replay protection. */
Herbert Xub318e0e2008-02-12 22:50:35 -0800612 union {
Steffen Klassert1ce36442011-03-08 00:06:31 +0000613 struct {
614 __u32 low;
615 __u32 hi;
616 } output;
617 struct {
618 __be32 low;
619 __be32 hi;
620 } input;
Herbert Xub318e0e2008-02-12 22:50:35 -0800621 } seq;
Herbert Xu436a0a42007-10-08 17:25:53 -0700622};
623
624#define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
625
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800626/*
627 * This structure is used by the afinfo prepare_input/prepare_output functions
628 * to transmit header information to the mode input/output functions.
629 */
630struct xfrm_mode_skb_cb {
Steffen Klassert70be6c92014-02-21 08:41:09 +0100631 struct xfrm_tunnel_skb_cb header;
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800632
633 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
634 __be16 id;
635 __be16 frag_off;
636
Herbert Xu732c8bd2008-03-26 16:51:09 -0700637 /* IP header length (excluding options or extension headers). */
638 u8 ihl;
639
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800640 /* TOS for IPv4, class for IPv6. */
641 u8 tos;
642
643 /* TTL for IPv4, hop limitfor IPv6. */
644 u8 ttl;
645
646 /* Protocol for IPv4, NH for IPv6. */
647 u8 protocol;
648
Herbert Xu732c8bd2008-03-26 16:51:09 -0700649 /* Option length for IPv4, zero for IPv6. */
650 u8 optlen;
651
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800652 /* Used by IPv6 only, zero for IPv4. */
653 u8 flow_lbl[3];
654};
655
656#define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
657
Herbert Xu716062f2007-11-13 21:44:23 -0800658/*
659 * This structure is used by the input processing to locate the SPI and
660 * related information.
661 */
662struct xfrm_spi_skb_cb {
Steffen Klassert70be6c92014-02-21 08:41:09 +0100663 struct xfrm_tunnel_skb_cb header;
Herbert Xu716062f2007-11-13 21:44:23 -0800664
Herbert Xu716062f2007-11-13 21:44:23 -0800665 unsigned int daddroff;
Herbert Xu2fcb45b2007-12-03 22:54:12 -0800666 unsigned int family;
Steffen Klassert7785bba2017-02-15 09:40:00 +0100667 __be32 seq;
Herbert Xu716062f2007-11-13 21:44:23 -0800668};
669
670#define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
671
Joy Lattenc9204d92006-11-30 15:50:43 -0600672#ifdef CONFIG_AUDITSYSCALL
Paul Mooreafeb14b2007-12-21 14:58:11 -0800673static inline struct audit_buffer *xfrm_audit_start(const char *op)
Joy Lattenab5f5e82007-09-17 11:51:22 -0700674{
675 struct audit_buffer *audit_buf = NULL;
Paul Mooreafeb14b2007-12-21 14:58:11 -0800676
Richard Guy Briggsf7859592018-06-05 19:20:39 -0400677 if (audit_enabled == AUDIT_OFF)
Paul Mooreafeb14b2007-12-21 14:58:11 -0800678 return NULL;
Richard Guy Briggscdfb6b32018-05-12 21:58:20 -0400679 audit_buf = audit_log_start(audit_context(), GFP_ATOMIC,
Paul Mooreafeb14b2007-12-21 14:58:11 -0800680 AUDIT_MAC_IPSEC_EVENT);
681 if (audit_buf == NULL)
682 return NULL;
683 audit_log_format(audit_buf, "op=%s", op);
684 return audit_buf;
685}
686
Tetsuo Handa2e710292014-04-22 21:48:30 +0900687static inline void xfrm_audit_helper_usrinfo(bool task_valid,
Paul Mooreafeb14b2007-12-21 14:58:11 -0800688 struct audit_buffer *audit_buf)
689{
Tetsuo Handa2e710292014-04-22 21:48:30 +0900690 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
691 audit_get_loginuid(current) :
692 INVALID_UID);
693 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
Richard Guy Briggsf0b75212018-05-12 21:58:19 -0400694 AUDIT_SID_UNSET;
Tetsuo Handa2e710292014-04-22 21:48:30 +0900695
696 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
Tetsuo Handaf1370cc2014-04-18 16:23:46 +0900697 audit_log_task_context(audit_buf);
Joy Lattenab5f5e82007-09-17 11:51:22 -0700698}
699
Tetsuo Handa2e710292014-04-22 21:48:30 +0900700void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
701void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
702 bool task_valid);
703void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
704void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
Joe Perchesd5113372013-09-23 11:33:53 -0700705void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
706 struct sk_buff *skb);
707void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
708 __be32 net_seq);
709void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
710void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
711 __be32 net_seq);
712void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
713 u8 proto);
Joy Lattenc9204d92006-11-30 15:50:43 -0600714#else
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700715
716static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
Tetsuo Handa2e710292014-04-22 21:48:30 +0900717 bool task_valid)
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700718{
719}
720
721static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
Tetsuo Handa2e710292014-04-22 21:48:30 +0900722 bool task_valid)
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700723{
724}
725
726static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
Tetsuo Handa2e710292014-04-22 21:48:30 +0900727 bool task_valid)
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700728{
729}
730
731static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
Tetsuo Handa2e710292014-04-22 21:48:30 +0900732 bool task_valid)
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700733{
734}
735
736static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
737 struct sk_buff *skb)
738{
739}
740
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000741static inline void xfrm_audit_state_replay(struct xfrm_state *x,
742 struct sk_buff *skb, __be32 net_seq)
743{
744}
745
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700746static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
747 u16 family)
748{
749}
750
751static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
752 __be32 net_spi, __be32 net_seq)
753{
754}
755
756static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
757 struct sk_buff *skb, u8 proto)
758{
759}
Joy Lattenc9204d92006-11-30 15:50:43 -0600760#endif /* CONFIG_AUDITSYSCALL */
Joy Latten161a09e2006-11-27 13:11:54 -0600761
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762static inline void xfrm_pol_hold(struct xfrm_policy *policy)
763{
764 if (likely(policy != NULL))
Reshetova, Elena850a6212017-07-04 15:53:22 +0300765 refcount_inc(&policy->refcnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766}
767
Joe Perchesd5113372013-09-23 11:33:53 -0700768void xfrm_policy_destroy(struct xfrm_policy *policy);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769
770static inline void xfrm_pol_put(struct xfrm_policy *policy)
771{
Reshetova, Elena850a6212017-07-04 15:53:22 +0300772 if (refcount_dec_and_test(&policy->refcnt))
WANG Cong64c31b32008-01-07 22:34:29 -0800773 xfrm_policy_destroy(policy);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774}
775
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -0700776static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
777{
778 int i;
779 for (i = npols - 1; i >= 0; --i)
780 xfrm_pol_put(pols[i]);
781}
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -0700782
Cong Wangf75a2802019-01-31 13:05:49 -0800783void __xfrm_state_destroy(struct xfrm_state *, bool);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784
Herbert Xu21380b82006-02-22 14:47:13 -0800785static inline void __xfrm_state_put(struct xfrm_state *x)
786{
Reshetova, Elena88755e9c2017-07-04 15:53:21 +0300787 refcount_dec(&x->refcnt);
Herbert Xu21380b82006-02-22 14:47:13 -0800788}
789
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790static inline void xfrm_state_put(struct xfrm_state *x)
791{
Reshetova, Elena88755e9c2017-07-04 15:53:21 +0300792 if (refcount_dec_and_test(&x->refcnt))
Cong Wangf75a2802019-01-31 13:05:49 -0800793 __xfrm_state_destroy(x, false);
794}
795
796static inline void xfrm_state_put_sync(struct xfrm_state *x)
797{
798 if (refcount_dec_and_test(&x->refcnt))
799 __xfrm_state_destroy(x, true);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800}
801
802static inline void xfrm_state_hold(struct xfrm_state *x)
803{
Reshetova, Elena88755e9c2017-07-04 15:53:21 +0300804 refcount_inc(&x->refcnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805}
806
David S. Miller1744a8f2011-02-22 18:02:12 -0800807static inline bool addr_match(const void *token1, const void *token2,
Alexey Dobriyane1b00482017-03-24 02:07:50 +0300808 unsigned int prefixlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809{
David S. Miller1744a8f2011-02-22 18:02:12 -0800810 const __be32 *a1 = token1;
811 const __be32 *a2 = token2;
Alexey Dobriyane1b00482017-03-24 02:07:50 +0300812 unsigned int pdw;
813 unsigned int pbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814
jamala6337462010-02-09 13:21:17 +0000815 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
817
818 if (pdw)
819 if (memcmp(a1, a2, pdw << 2))
David S. Miller1744a8f2011-02-22 18:02:12 -0800820 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821
822 if (pbi) {
Al Viro5f193432006-09-27 18:46:32 -0700823 __be32 mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824
825 mask = htonl((0xffffffff) << (32 - pbi));
826
827 if ((a1[pdw] ^ a2[pdw]) & mask)
David S. Miller1744a8f2011-02-22 18:02:12 -0800828 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 }
830
David S. Miller1744a8f2011-02-22 18:02:12 -0800831 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832}
833
Alexey Dobriyan26bff942011-11-22 06:46:02 +0000834static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
835{
836 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
Alexey Dobriyan6c786bc2017-03-25 19:41:17 +0300837 if (sizeof(long) == 4 && prefixlen == 0)
Alexey Dobriyan26bff942011-11-22 06:46:02 +0000838 return true;
Alexey Dobriyan6c786bc2017-03-25 19:41:17 +0300839 return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen)));
Alexey Dobriyan26bff942011-11-22 06:46:02 +0000840}
841
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842static __inline__
David S. Miller6281dcc2011-03-12 00:43:55 -0500843__be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844{
Al Virof9d07e41f82006-09-27 18:45:50 -0700845 __be16 port;
David S. Miller1d28f422011-03-12 00:29:39 -0500846 switch(fl->flowi_proto) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 case IPPROTO_TCP:
848 case IPPROTO_UDP:
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800849 case IPPROTO_UDPLITE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850 case IPPROTO_SCTP:
David S. Miller6281dcc2011-03-12 00:43:55 -0500851 port = uli->ports.sport;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 break;
853 case IPPROTO_ICMP:
854 case IPPROTO_ICMPV6:
David S. Miller6281dcc2011-03-12 00:43:55 -0500855 port = htons(uli->icmpt.type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 break;
Masahide NAKAMURA2ce42722006-08-23 20:39:03 -0700857 case IPPROTO_MH:
David S. Miller6281dcc2011-03-12 00:43:55 -0500858 port = htons(uli->mht.type);
Masahide NAKAMURA2ce42722006-08-23 20:39:03 -0700859 break;
Timo Teräscc9ff192010-11-03 04:41:38 +0000860 case IPPROTO_GRE:
David S. Miller6281dcc2011-03-12 00:43:55 -0500861 port = htons(ntohl(uli->gre_key) >> 16);
Timo Teräscc9ff192010-11-03 04:41:38 +0000862 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 default:
864 port = 0; /*XXX*/
865 }
866 return port;
867}
868
869static __inline__
David S. Miller6281dcc2011-03-12 00:43:55 -0500870__be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871{
Al Virof9d07e41f82006-09-27 18:45:50 -0700872 __be16 port;
David S. Miller1d28f422011-03-12 00:29:39 -0500873 switch(fl->flowi_proto) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 case IPPROTO_TCP:
875 case IPPROTO_UDP:
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800876 case IPPROTO_UDPLITE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 case IPPROTO_SCTP:
David S. Miller6281dcc2011-03-12 00:43:55 -0500878 port = uli->ports.dport;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 break;
880 case IPPROTO_ICMP:
881 case IPPROTO_ICMPV6:
David S. Miller6281dcc2011-03-12 00:43:55 -0500882 port = htons(uli->icmpt.code);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 break;
Timo Teräscc9ff192010-11-03 04:41:38 +0000884 case IPPROTO_GRE:
David S. Miller6281dcc2011-03-12 00:43:55 -0500885 port = htons(ntohl(uli->gre_key) & 0xffff);
Timo Teräscc9ff192010-11-03 04:41:38 +0000886 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 default:
888 port = 0; /*XXX*/
889 }
890 return port;
891}
892
Joe Perchesd5113372013-09-23 11:33:53 -0700893bool xfrm_selector_match(const struct xfrm_selector *sel,
894 const struct flowi *fl, unsigned short family);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895
Trent Jaegerdf718372005-12-13 23:12:27 -0800896#ifdef CONFIG_SECURITY_NETWORK_XFRM
897/* If neither has a context --> match
898 * Otherwise, both must have a context and the sids, doi, alg must match
899 */
David S. Millerbc9b35a2012-05-15 15:04:57 -0400900static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
Trent Jaegerdf718372005-12-13 23:12:27 -0800901{
902 return ((!s1 && !s2) ||
903 (s1 && s2 &&
904 (s1->ctx_sid == s2->ctx_sid) &&
905 (s1->ctx_doi == s2->ctx_doi) &&
906 (s1->ctx_alg == s2->ctx_alg)));
907}
908#else
David S. Millerbc9b35a2012-05-15 15:04:57 -0400909static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
Trent Jaegerdf718372005-12-13 23:12:27 -0800910{
David S. Millerbc9b35a2012-05-15 15:04:57 -0400911 return true;
Trent Jaegerdf718372005-12-13 23:12:27 -0800912}
913#endif
914
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915/* A struct encoding bundle of transformations to apply to some set of flow.
916 *
David Millerb6ca8bd2017-11-28 15:45:44 -0500917 * xdst->child points to the next element of bundle.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918 * dst->xfrm points to an instanse of transformer.
919 *
920 * Due to unfortunate limitations of current routing cache, which we
921 * have no time to fix, it mirrors struct rtable and bound to the same
922 * routing key, including saddr,daddr. However, we can have many of
923 * bundles differing by session id. All the bundles grow from a parent
924 * policy rule.
925 */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000926struct xfrm_dst {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927 union {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 struct dst_entry dst;
929 struct rtable rt;
930 struct rt6_info rt6;
931 } u;
932 struct dst_entry *route;
David Millerb6ca8bd2017-11-28 15:45:44 -0500933 struct dst_entry *child;
David Miller0f6c4802017-11-28 15:40:46 -0500934 struct dst_entry *path;
Timo Teräs80c802f2010-04-07 00:30:05 +0000935 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
936 int num_pols, num_xfrms;
Timo Teräs80c802f2010-04-07 00:30:05 +0000937 u32 xfrm_genid;
938 u32 policy_genid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 u32 route_mtu_cached;
940 u32 child_mtu_cached;
Hideaki YOSHIFUJI92d63de2005-05-26 12:58:04 -0700941 u32 route_cookie;
942 u32 path_cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943};
944
David Miller0f6c4802017-11-28 15:40:46 -0500945static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst)
946{
947#ifdef CONFIG_XFRM
948 if (dst->xfrm) {
949 const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst;
950
951 return xdst->path;
952 }
953#endif
954 return (struct dst_entry *) dst;
955}
956
David Millerb92cf4a2017-11-28 15:40:22 -0500957static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst)
958{
959#ifdef CONFIG_XFRM
David Millerb6ca8bd2017-11-28 15:45:44 -0500960 if (dst->xfrm) {
961 struct xfrm_dst *xdst = (struct xfrm_dst *) dst;
962 return xdst->child;
963 }
David Millerb92cf4a2017-11-28 15:40:22 -0500964#endif
965 return NULL;
966}
967
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -0700968#ifdef CONFIG_XFRM
David Miller45b018be2017-11-28 15:40:28 -0500969static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child)
970{
David Millerb6ca8bd2017-11-28 15:45:44 -0500971 xdst->child = child;
David Miller45b018be2017-11-28 15:40:28 -0500972}
973
Herbert Xuaabc9762005-05-03 16:27:10 -0700974static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
975{
Timo Teräs80c802f2010-04-07 00:30:05 +0000976 xfrm_pols_put(xdst->pols, xdst->num_pols);
Herbert Xuaabc9762005-05-03 16:27:10 -0700977 dst_release(xdst->route);
978 if (likely(xdst->u.dst.xfrm))
979 xfrm_state_put(xdst->u.dst.xfrm);
980}
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -0700981#endif
Herbert Xuaabc9762005-05-03 16:27:10 -0700982
Joe Perchesd5113372013-09-23 11:33:53 -0700983void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
Herbert Xuaabc9762005-05-03 16:27:10 -0700984
Steffen Klassertf203b762018-06-12 14:07:12 +0200985struct xfrm_if_parms {
986 char name[IFNAMSIZ]; /* name of XFRM device */
987 int link; /* ifindex of underlying L2 interface */
988 u32 if_id; /* interface identifyer */
989};
990
991struct xfrm_if {
992 struct xfrm_if __rcu *next; /* next interface in list */
993 struct net_device *dev; /* virtual device associated with interface */
994 struct net_device *phydev; /* physical device */
995 struct net *net; /* netns for packet i/o */
996 struct xfrm_if_parms p; /* interface parms */
997
998 struct gro_cells gro_cells;
999};
1000
Steffen Klassert54ef2072017-02-15 09:39:54 +01001001struct xfrm_offload {
1002 /* Output sequence number for replay protection on offloading. */
1003 struct {
1004 __u32 low;
1005 __u32 hi;
1006 } seq;
1007
1008 __u32 flags;
1009#define SA_DELETE_REQ 1
1010#define CRYPTO_DONE 2
1011#define CRYPTO_NEXT_DONE 4
1012#define CRYPTO_FALLBACK 8
1013#define XFRM_GSO_SEGMENT 16
1014#define XFRM_GRO 32
Yossi Kuperman47ebcc02017-08-30 11:30:39 +03001015#define XFRM_ESP_NO_TRAILER 64
Steffen Klassertf53c7232017-12-20 10:41:36 +01001016#define XFRM_DEV_RESUME 128
Steffen Klassert54ef2072017-02-15 09:39:54 +01001017
1018 __u32 status;
1019#define CRYPTO_SUCCESS 1
1020#define CRYPTO_GENERIC_ERROR 2
1021#define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
1022#define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
1023#define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
1024#define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
1025#define CRYPTO_INVALID_PACKET_SYNTAX 64
1026#define CRYPTO_INVALID_PROTOCOL 128
1027
1028 __u8 proto;
1029};
1030
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +00001031struct sec_path {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 int len;
Steffen Klassert54ef2072017-02-15 09:39:54 +01001033 int olen;
1034
Herbert Xudbe5b4a2006-04-01 00:54:16 -08001035 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
Steffen Klassert54ef2072017-02-15 09:39:54 +01001036 struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037};
1038
Florian Westphal0ca64da2018-12-18 17:15:18 +01001039struct sec_path *secpath_set(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040
1041static inline void
1042secpath_reset(struct sk_buff *skb)
1043{
1044#ifdef CONFIG_XFRM
Florian Westphal4165079b2018-12-18 17:15:27 +01001045 skb_ext_del(skb, SKB_EXT_SEC_PATH);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046#endif
1047}
1048
1049static inline int
David S. Miller6cc32962011-02-24 00:19:59 -05001050xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
Patrick McHardya1e59ab2006-09-19 12:57:34 -07001051{
1052 switch (family) {
1053 case AF_INET:
1054 return addr->a4 == 0;
1055 case AF_INET6:
Jiri Benc15e318b2015-03-29 16:59:24 +02001056 return ipv6_addr_any(&addr->in6);
Patrick McHardya1e59ab2006-09-19 12:57:34 -07001057 }
1058 return 0;
1059}
1060
1061static inline int
David S. Miller21eddb52011-02-24 01:35:16 -05001062__xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063{
1064 return (tmpl->saddr.a4 &&
1065 tmpl->saddr.a4 != x->props.saddr.a4);
1066}
1067
1068static inline int
David S. Miller21eddb52011-02-24 01:35:16 -05001069__xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070{
1071 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
YOSHIFUJI Hideaki / 吉藤英明ff88b302013-01-29 12:48:31 +00001072 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073}
1074
1075static inline int
David S. Miller21eddb52011-02-24 01:35:16 -05001076xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077{
1078 switch (family) {
1079 case AF_INET:
1080 return __xfrm4_state_addr_cmp(tmpl, x);
1081 case AF_INET6:
1082 return __xfrm6_state_addr_cmp(tmpl, x);
1083 }
1084 return !0;
1085}
1086
1087#ifdef CONFIG_XFRM
Joe Perchesd5113372013-09-23 11:33:53 -07001088int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1089 unsigned short family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090
Herbert Xud5422ef2007-12-12 10:44:16 -08001091static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1092 struct sk_buff *skb,
1093 unsigned int family, int reverse)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094{
Alexey Dobriyanf6e1e252008-11-25 17:35:44 -08001095 struct net *net = dev_net(skb->dev);
Herbert Xud5422ef2007-12-12 10:44:16 -08001096 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1097
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 if (sk && sk->sk_policy[XFRM_POLICY_IN])
Herbert Xud5422ef2007-12-12 10:44:16 -08001099 return __xfrm_policy_check(sk, ndir, skb, family);
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -07001100
Florian Westphal26912e32018-12-18 17:15:24 +01001101 return (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) ||
Eric Dumazetadf30902009-06-02 05:19:30 +00001102 (skb_dst(skb)->flags & DST_NOPOLICY) ||
Herbert Xud5422ef2007-12-12 10:44:16 -08001103 __xfrm_policy_check(sk, ndir, skb, family);
1104}
1105
1106static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1107{
1108 return __xfrm_policy_check2(sk, dir, skb, family, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109}
1110
1111static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1112{
1113 return xfrm_policy_check(sk, dir, skb, AF_INET);
1114}
1115
1116static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1117{
1118 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1119}
1120
Herbert Xud5422ef2007-12-12 10:44:16 -08001121static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1122 struct sk_buff *skb)
1123{
1124 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1125}
1126
1127static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1128 struct sk_buff *skb)
1129{
1130 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1131}
1132
Joe Perchesd5113372013-09-23 11:33:53 -07001133int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1134 unsigned int family, int reverse);
Herbert Xud5422ef2007-12-12 10:44:16 -08001135
1136static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1137 unsigned int family)
1138{
1139 return __xfrm_decode_session(skb, fl, family, 0);
1140}
1141
1142static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1143 struct flowi *fl,
1144 unsigned int family)
1145{
1146 return __xfrm_decode_session(skb, fl, family, 1);
1147}
1148
Joe Perchesd5113372013-09-23 11:33:53 -07001149int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150
1151static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1152{
Alexey Dobriyan99a66652008-11-25 17:36:13 -08001153 struct net *net = dev_net(skb->dev);
1154
1155 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
Eric Dumazetadf30902009-06-02 05:19:30 +00001156 (skb_dst(skb)->flags & DST_NOXFRM) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157 __xfrm_route_forward(skb, family);
1158}
1159
1160static inline int xfrm4_route_forward(struct sk_buff *skb)
1161{
1162 return xfrm_route_forward(skb, AF_INET);
1163}
1164
1165static inline int xfrm6_route_forward(struct sk_buff *skb)
1166{
1167 return xfrm_route_forward(skb, AF_INET6);
1168}
1169
Eric Dumazetd188ba82015-12-08 07:22:02 -08001170int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171
Eric Dumazetd188ba82015-12-08 07:22:02 -08001172static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173{
Eric Dumazetd188ba82015-12-08 07:22:02 -08001174 sk->sk_policy[0] = NULL;
1175 sk->sk_policy[1] = NULL;
1176 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1177 return __xfrm_sk_clone_policy(sk, osk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 return 0;
1179}
1180
Joe Perchesd5113372013-09-23 11:33:53 -07001181int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182
1183static inline void xfrm_sk_free_policy(struct sock *sk)
1184{
Eric Dumazetd188ba82015-12-08 07:22:02 -08001185 struct xfrm_policy *pol;
1186
1187 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1188 if (unlikely(pol != NULL)) {
1189 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190 sk->sk_policy[0] = NULL;
1191 }
Eric Dumazetd188ba82015-12-08 07:22:02 -08001192 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1193 if (unlikely(pol != NULL)) {
1194 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195 sk->sk_policy[1] = NULL;
1196 }
1197}
1198
1199#else
1200
1201static inline void xfrm_sk_free_policy(struct sock *sk) {}
Eric Dumazetd188ba82015-12-08 07:22:02 -08001202static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
Stephen Hemminger82695b32018-02-27 15:48:21 -08001203static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1204static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
Stephen Hemminger82695b32018-02-27 15:48:21 -08001206{
1207 return 1;
1208}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1210{
1211 return 1;
1212}
1213static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1214{
1215 return 1;
1216}
Herbert Xud5422ef2007-12-12 10:44:16 -08001217static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1218 struct flowi *fl,
1219 unsigned int family)
1220{
1221 return -ENOSYS;
1222}
1223static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1224 struct sk_buff *skb)
1225{
1226 return 1;
1227}
1228static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1229 struct sk_buff *skb)
1230{
1231 return 1;
1232}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233#endif
1234
1235static __inline__
David S. Millere8a4e372011-02-22 17:42:56 -08001236xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237{
1238 switch (family){
1239 case AF_INET:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001240 return (xfrm_address_t *)&fl->u.ip4.daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241 case AF_INET6:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001242 return (xfrm_address_t *)&fl->u.ip6.daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 }
1244 return NULL;
1245}
1246
1247static __inline__
David S. Millere8a4e372011-02-22 17:42:56 -08001248xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249{
1250 switch (family){
1251 case AF_INET:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001252 return (xfrm_address_t *)&fl->u.ip4.saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253 case AF_INET6:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001254 return (xfrm_address_t *)&fl->u.ip6.saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255 }
1256 return NULL;
1257}
1258
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001259static __inline__
David S. Millere8a4e372011-02-22 17:42:56 -08001260void xfrm_flowi_addr_get(const struct flowi *fl,
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001261 xfrm_address_t *saddr, xfrm_address_t *daddr,
1262 unsigned short family)
1263{
1264 switch(family) {
1265 case AF_INET:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001266 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1267 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001268 break;
1269 case AF_INET6:
Jiri Benc15e318b2015-03-29 16:59:24 +02001270 saddr->in6 = fl->u.ip6.saddr;
1271 daddr->in6 = fl->u.ip6.daddr;
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001272 break;
1273 }
1274}
1275
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001277__xfrm4_state_addr_check(const struct xfrm_state *x,
1278 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279{
1280 if (daddr->a4 == x->id.daddr.a4 &&
1281 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1282 return 1;
1283 return 0;
1284}
1285
1286static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001287__xfrm6_state_addr_check(const struct xfrm_state *x,
1288 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289{
YOSHIFUJI Hideaki / 吉藤英明ff88b302013-01-29 12:48:31 +00001290 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1291 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
Stephen Hemminger82695b32018-02-27 15:48:21 -08001292 ipv6_addr_any((struct in6_addr *)saddr) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1294 return 1;
1295 return 0;
1296}
1297
1298static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001299xfrm_state_addr_check(const struct xfrm_state *x,
1300 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 unsigned short family)
1302{
1303 switch (family) {
1304 case AF_INET:
1305 return __xfrm4_state_addr_check(x, daddr, saddr);
1306 case AF_INET6:
1307 return __xfrm6_state_addr_check(x, daddr, saddr);
1308 }
1309 return 0;
1310}
1311
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001312static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001313xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001314 unsigned short family)
1315{
1316 switch (family) {
1317 case AF_INET:
1318 return __xfrm4_state_addr_check(x,
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001319 (const xfrm_address_t *)&fl->u.ip4.daddr,
1320 (const xfrm_address_t *)&fl->u.ip4.saddr);
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001321 case AF_INET6:
1322 return __xfrm6_state_addr_check(x,
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001323 (const xfrm_address_t *)&fl->u.ip6.daddr,
1324 (const xfrm_address_t *)&fl->u.ip6.saddr);
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001325 }
1326 return 0;
1327}
1328
David S. Millerf8848062011-02-24 01:42:28 -05001329static inline int xfrm_state_kern(const struct xfrm_state *x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330{
1331 return atomic_read(&x->tunnel_users);
1332}
1333
Cong Wangdbb24832019-03-22 16:26:19 -07001334static inline bool xfrm_id_proto_valid(u8 proto)
1335{
1336 switch (proto) {
1337 case IPPROTO_AH:
1338 case IPPROTO_ESP:
1339 case IPPROTO_COMP:
1340#if IS_ENABLED(CONFIG_IPV6)
1341 case IPPROTO_ROUTING:
1342 case IPPROTO_DSTOPTS:
1343#endif
1344 return true;
1345 default:
1346 return false;
1347 }
1348}
1349
1350/* IPSEC_PROTO_ANY only matches 3 IPsec protocols, 0 could match all. */
Masahide NAKAMURA57947082006-09-22 15:06:24 -07001351static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1352{
Masahide NAKAMURAdc00a522006-08-23 17:49:52 -07001353 return (!userproto || proto == userproto ||
1354 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1355 proto == IPPROTO_ESP ||
1356 proto == IPPROTO_COMP)));
Masahide NAKAMURA57947082006-09-22 15:06:24 -07001357}
1358
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359/*
1360 * xfrm algorithm information
1361 */
Herbert Xu1a6509d2008-01-28 19:37:29 -08001362struct xfrm_algo_aead_info {
Herbert Xu165ecc62015-05-27 16:03:44 +08001363 char *geniv;
Herbert Xu1a6509d2008-01-28 19:37:29 -08001364 u16 icv_truncbits;
1365};
1366
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367struct xfrm_algo_auth_info {
1368 u16 icv_truncbits;
1369 u16 icv_fullbits;
1370};
1371
1372struct xfrm_algo_encr_info {
Herbert Xu165ecc62015-05-27 16:03:44 +08001373 char *geniv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374 u16 blockbits;
1375 u16 defkeybits;
1376};
1377
1378struct xfrm_algo_comp_info {
1379 u16 threshold;
1380};
1381
1382struct xfrm_algo_desc {
1383 char *name;
Herbert Xu04ff12602006-08-13 08:50:00 +10001384 char *compat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385 u8 available:1;
Jussi Kivilinna7e50f842013-01-31 12:40:38 +02001386 u8 pfkey_supported:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387 union {
Herbert Xu1a6509d2008-01-28 19:37:29 -08001388 struct xfrm_algo_aead_info aead;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389 struct xfrm_algo_auth_info auth;
1390 struct xfrm_algo_encr_info encr;
1391 struct xfrm_algo_comp_info comp;
1392 } uinfo;
1393 struct sadb_alg desc;
1394};
1395
Steffen Klassert33287152014-02-21 08:41:08 +01001396/* XFRM protocol handlers. */
1397struct xfrm4_protocol {
1398 int (*handler)(struct sk_buff *skb);
1399 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1400 int encap_type);
1401 int (*cb_handler)(struct sk_buff *skb, int err);
1402 int (*err_handler)(struct sk_buff *skb, u32 info);
1403
1404 struct xfrm4_protocol __rcu *next;
1405 int priority;
1406};
1407
Steffen Klassert7e14ea12014-03-14 07:28:07 +01001408struct xfrm6_protocol {
1409 int (*handler)(struct sk_buff *skb);
1410 int (*cb_handler)(struct sk_buff *skb, int err);
1411 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1412 u8 type, u8 code, int offset, __be32 info);
1413
1414 struct xfrm6_protocol __rcu *next;
1415 int priority;
1416};
1417
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418/* XFRM tunnel handlers. */
1419struct xfrm_tunnel {
1420 int (*handler)(struct sk_buff *skb);
jamala6337462010-02-09 13:21:17 +00001421 int (*err_handler)(struct sk_buff *skb, u32 info);
Herbert Xud2acc342006-03-28 01:12:13 -08001422
Eric Dumazetb33eab02010-10-25 21:01:26 +00001423 struct xfrm_tunnel __rcu *next;
Herbert Xud2acc342006-03-28 01:12:13 -08001424 int priority;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425};
1426
1427struct xfrm6_tunnel {
Herbert Xud2acc342006-03-28 01:12:13 -08001428 int (*handler)(struct sk_buff *skb);
1429 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
Brian Haleyd5fdd6b2009-06-23 04:31:07 -07001430 u8 type, u8 code, int offset, __be32 info);
Eric Dumazet6f0bcf12010-10-24 21:33:16 +00001431 struct xfrm6_tunnel __rcu *next;
Herbert Xud2acc342006-03-28 01:12:13 -08001432 int priority;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433};
1434
Joe Perchesd5113372013-09-23 11:33:53 -07001435void xfrm_init(void);
1436void xfrm4_init(void);
1437int xfrm_state_init(struct net *net);
1438void xfrm_state_fini(struct net *net);
1439void xfrm4_state_init(void);
Steffen Klassert2f32b512014-03-14 07:28:07 +01001440void xfrm4_protocol_init(void);
Daniel Lezcanoc35b7e72007-12-08 00:14:11 -08001441#ifdef CONFIG_XFRM
Joe Perchesd5113372013-09-23 11:33:53 -07001442int xfrm6_init(void);
1443void xfrm6_fini(void);
1444int xfrm6_state_init(void);
1445void xfrm6_state_fini(void);
Steffen Klassert7e14ea12014-03-14 07:28:07 +01001446int xfrm6_protocol_init(void);
1447void xfrm6_protocol_fini(void);
Daniel Lezcanoc35b7e72007-12-08 00:14:11 -08001448#else
1449static inline int xfrm6_init(void)
1450{
1451 return 0;
1452}
1453static inline void xfrm6_fini(void)
1454{
1455 ;
1456}
1457#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -08001459#ifdef CONFIG_XFRM_STATISTICS
Joe Perchesd5113372013-09-23 11:33:53 -07001460int xfrm_proc_init(struct net *net);
1461void xfrm_proc_fini(struct net *net);
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -08001462#endif
1463
Joe Perchesd5113372013-09-23 11:33:53 -07001464int xfrm_sysctl_init(struct net *net);
Alexey Dobriyanb27aead2008-11-25 18:00:48 -08001465#ifdef CONFIG_SYSCTL
Joe Perchesd5113372013-09-23 11:33:53 -07001466void xfrm_sysctl_fini(struct net *net);
Alexey Dobriyanb27aead2008-11-25 18:00:48 -08001467#else
1468static inline void xfrm_sysctl_fini(struct net *net)
1469{
1470}
1471#endif
1472
Nicolas Dichteld3623092014-02-14 15:30:36 +01001473void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
Nicolas Dichtel870a2df2014-03-06 18:24:29 +01001474 struct xfrm_address_filter *filter);
Joe Perchesd5113372013-09-23 11:33:53 -07001475int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1476 int (*func)(struct xfrm_state *, int, void*), void *);
Fan Du283bc9f2013-11-07 17:47:50 +08001477void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
Joe Perchesd5113372013-09-23 11:33:53 -07001478struct xfrm_state *xfrm_state_alloc(struct net *net);
Mathias Krause4a135e52018-11-21 21:09:23 +01001479void xfrm_state_free(struct xfrm_state *x);
Joe Perchesd5113372013-09-23 11:33:53 -07001480struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1481 const xfrm_address_t *saddr,
1482 const struct flowi *fl,
1483 struct xfrm_tmpl *tmpl,
1484 struct xfrm_policy *pol, int *err,
Benedict Wongbc56b332018-07-19 10:50:44 -07001485 unsigned short family, u32 if_id);
Steffen Klassert7e652642018-06-12 14:07:07 +02001486struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
Joe Perchesd5113372013-09-23 11:33:53 -07001487 xfrm_address_t *daddr,
1488 xfrm_address_t *saddr,
1489 unsigned short family,
1490 u8 mode, u8 proto, u32 reqid);
Fan Duc4549972014-01-03 11:18:32 +08001491struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1492 unsigned short family);
Joe Perchesd5113372013-09-23 11:33:53 -07001493int xfrm_state_check_expire(struct xfrm_state *x);
1494void xfrm_state_insert(struct xfrm_state *x);
1495int xfrm_state_add(struct xfrm_state *x);
1496int xfrm_state_update(struct xfrm_state *x);
1497struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1498 const xfrm_address_t *daddr, __be32 spi,
1499 u8 proto, unsigned short family);
1500struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1501 const xfrm_address_t *daddr,
1502 const xfrm_address_t *saddr,
1503 u8 proto,
1504 unsigned short family);
Masahide NAKAMURA41a49cc2006-08-23 22:48:31 -07001505#ifdef CONFIG_XFRM_SUB_POLICY
Florian Westphal3aaf3912019-05-03 17:46:17 +02001506void xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
Joe Perchesd5113372013-09-23 11:33:53 -07001507 unsigned short family);
Florian Westphal3aaf3912019-05-03 17:46:17 +02001508void xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1509 unsigned short family);
Masahide NAKAMURA41a49cc2006-08-23 22:48:31 -07001510#else
Florian Westphal3aaf3912019-05-03 17:46:17 +02001511static inline void xfrm_tmpl_sort(struct xfrm_tmpl **d, struct xfrm_tmpl **s,
Masahide NAKAMURA41a49cc2006-08-23 22:48:31 -07001512 int n, unsigned short family)
1513{
Florian Westphal3aaf3912019-05-03 17:46:17 +02001514}
1515
1516static inline void xfrm_state_sort(struct xfrm_state **d, struct xfrm_state **s,
1517 int n, unsigned short family)
1518{
Masahide NAKAMURA41a49cc2006-08-23 22:48:31 -07001519}
1520#endif
Jamal Hadi Salimaf11e312007-05-04 12:55:13 -07001521
1522struct xfrmk_sadinfo {
1523 u32 sadhcnt; /* current hash bkts */
1524 u32 sadhmcnt; /* max allowed hash bkts */
1525 u32 sadcnt; /* current running count */
1526};
1527
Jamal Hadi Salim5a6d3412007-05-04 12:55:39 -07001528struct xfrmk_spdinfo {
1529 u32 incnt;
1530 u32 outcnt;
1531 u32 fwdcnt;
1532 u32 inscnt;
1533 u32 outscnt;
1534 u32 fwdscnt;
1535 u32 spdhcnt;
1536 u32 spdhmcnt;
1537};
1538
Joe Perchesd5113372013-09-23 11:33:53 -07001539struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1540int xfrm_state_delete(struct xfrm_state *x);
Cong Wangf75a2802019-01-31 13:05:49 -08001541int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync);
Steffen Klassertd77e38e2017-04-14 10:06:10 +02001542int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
Joe Perchesd5113372013-09-23 11:33:53 -07001543void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1544void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1545u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1546int xfrm_init_replay(struct xfrm_state *x);
Florian Westphalc7b37c72019-06-24 22:04:48 +02001547u32 xfrm_state_mtu(struct xfrm_state *x, int mtu);
Ilan Tayariffdb5212017-08-01 12:49:08 +03001548int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload);
Joe Perchesd5113372013-09-23 11:33:53 -07001549int xfrm_init_state(struct xfrm_state *x);
Joe Perchesd5113372013-09-23 11:33:53 -07001550int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1551int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
Herbert Xuacf568e2017-12-15 16:40:44 +11001552int xfrm_trans_queue(struct sk_buff *skb,
1553 int (*finish)(struct net *, struct sock *,
1554 struct sk_buff *));
Joe Perchesd5113372013-09-23 11:33:53 -07001555int xfrm_output_resume(struct sk_buff *skb, int err);
David Miller7026b1d2015-04-05 22:19:04 -04001556int xfrm_output(struct sock *sk, struct sk_buff *skb);
Florian Westphal0c620e92019-03-29 21:16:25 +01001557
1558#if IS_ENABLED(CONFIG_NET_PKTGEN)
1559int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb);
1560#endif
1561
Joe Perchesd5113372013-09-23 11:33:53 -07001562void xfrm_local_error(struct sk_buff *skb, int mtu);
1563int xfrm4_extract_header(struct sk_buff *skb);
1564int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1565int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1566 int encap_type);
1567int xfrm4_transport_finish(struct sk_buff *skb, int async);
1568int xfrm4_rcv(struct sk_buff *skb);
Steffen Klassert1e295372017-02-15 09:39:49 +01001569int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
Herbert Xuc4541b42007-10-17 21:28:53 -07001570
1571static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1572{
Steffen Klassert70be6c92014-02-21 08:41:09 +01001573 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
Steffen Klassert33287152014-02-21 08:41:08 +01001574 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);
Herbert Xuc4541b42007-10-17 21:28:53 -07001577}
1578
Joe Perchesd5113372013-09-23 11:33:53 -07001579int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
Eric W. Biedermanede20592015-10-07 16:48:47 -05001580int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
David Miller7026b1d2015-04-05 22:19:04 -04001581int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
Steffen Klassert33287152014-02-21 08:41:08 +01001582int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1583int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
Joe Perchesd5113372013-09-23 11:33:53 -07001584int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1585int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
Joe Perchesd5113372013-09-23 11:33:53 -07001586void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1587int xfrm6_extract_header(struct sk_buff *skb);
1588int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
Nicolas Dichtel63c43782016-09-19 16:17:57 +02001589int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1590 struct ip6_tnl *t);
Joe Perchesd5113372013-09-23 11:33:53 -07001591int xfrm6_transport_finish(struct sk_buff *skb, int async);
Nicolas Dichtel63c43782016-09-19 16:17:57 +02001592int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
Joe Perchesd5113372013-09-23 11:33:53 -07001593int xfrm6_rcv(struct sk_buff *skb);
1594int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1595 xfrm_address_t *saddr, u8 proto);
David S. Miller7b77d162013-09-30 15:11:00 -04001596void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
Steffen Klassert7e14ea12014-03-14 07:28:07 +01001597int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1598int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
Joe Perchesd5113372013-09-23 11:33:53 -07001599int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
David S. Miller7b77d162013-09-30 15:11:00 -04001600int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
Joe Perchesd5113372013-09-23 11:33:53 -07001601__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);
1603int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
Eric W. Biedermanede20592015-10-07 16:48:47 -05001604int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
David Miller7026b1d2015-04-05 22:19:04 -04001605int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
Joe Perchesd5113372013-09-23 11:33:53 -07001606int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1607 u8 **prevhdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608
1609#ifdef CONFIG_XFRM
Joe Perchesd5113372013-09-23 11:33:53 -07001610int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1611int xfrm_user_policy(struct sock *sk, int optname,
1612 u8 __user *optval, int optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613#else
1614static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1615{
1616 return -ENOPROTOOPT;
Stephen Hemminger82695b32018-02-27 15:48:21 -08001617}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618
James Chapman067b2072007-07-05 17:08:05 -07001619static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001620{
1621 /* should not happen */
1622 kfree_skb(skb);
1623 return 0;
1624}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001625#endif
1626
Steffen Klassertd77e38e2017-04-14 10:06:10 +02001627struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
1628 const xfrm_address_t *saddr,
1629 const xfrm_address_t *daddr,
Lorenzo Colitti077fbac2017-08-11 02:11:33 +09001630 int family, u32 mark);
Steffen Klassertd77e38e2017-04-14 10:06:10 +02001631
Alexey Dobriyan0331b1f2008-11-25 17:21:45 -08001632struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
Timo Teras4c563f72008-02-28 21:31:08 -08001633
Joe Perchesd5113372013-09-23 11:33:53 -07001634void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1635int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1636 int (*func)(struct xfrm_policy *, int, int, void*),
1637 void *);
Fan Du283bc9f2013-11-07 17:47:50 +08001638void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001639int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
Steffen Klassert7e652642018-06-12 14:07:07 +02001640struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, u32 if_id,
Jamal Hadi Salim8ca2e932010-02-22 11:32:57 +00001641 u8 type, int dir,
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -07001642 struct xfrm_selector *sel,
Eric Parisef41aaa2007-03-07 15:37:58 -08001643 struct xfrm_sec_ctx *ctx, int delete,
1644 int *err);
Steffen Klassert7e652642018-06-12 14:07:07 +02001645struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u32 if_id, u8,
1646 int dir, u32 id, int delete, int *err);
Tetsuo Handa2e710292014-04-22 21:48:30 +09001647int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
Christophe Gouault880a6fa2014-08-29 16:16:05 +02001648void xfrm_policy_hash_rebuild(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001649u32 xfrm_get_acqseq(void);
Fan Du776e9dd2013-12-16 18:47:49 +08001650int verify_spi_info(u8 proto, u32 min, u32 max);
Joe Perchesd5113372013-09-23 11:33:53 -07001651int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
Mathias Krausee473fcb2013-06-26 23:56:58 +02001652struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
Steffen Klassert7e652642018-06-12 14:07:07 +02001653 u8 mode, u32 reqid, u32 if_id, u8 proto,
David S. Millera70486f2011-02-27 23:17:24 -08001654 const xfrm_address_t *daddr,
1655 const xfrm_address_t *saddr, int create,
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001656 unsigned short family);
Joe Perchesd5113372013-09-23 11:33:53 -07001657int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001658
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001659#ifdef CONFIG_XFRM_MIGRATE
Joe Perchesd5113372013-09-23 11:33:53 -07001660int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1661 const struct xfrm_migrate *m, int num_bundles,
Antony Antony8bafd732017-06-06 12:12:14 +02001662 const struct xfrm_kmaddress *k,
1663 const struct xfrm_encap_tmpl *encap);
Fan Du283bc9f2013-11-07 17:47:50 +08001664struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
Joe Perchesd5113372013-09-23 11:33:53 -07001665struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
Antony Antony4ab47d42017-06-06 12:12:13 +02001666 struct xfrm_migrate *m,
1667 struct xfrm_encap_tmpl *encap);
Joe Perchesd5113372013-09-23 11:33:53 -07001668int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1669 struct xfrm_migrate *m, int num_bundles,
Antony Antony4ab47d42017-06-06 12:12:13 +02001670 struct xfrm_kmaddress *k, struct net *net,
1671 struct xfrm_encap_tmpl *encap);
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001672#endif
1673
Joe Perchesd5113372013-09-23 11:33:53 -07001674int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1675void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1676int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1677 xfrm_address_t *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001678
Joe Perchesd5113372013-09-23 11:33:53 -07001679void xfrm_input_init(void);
1680int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001681
Joe Perchesd5113372013-09-23 11:33:53 -07001682void xfrm_probe_algs(void);
1683int xfrm_count_pfkey_auth_supported(void);
1684int xfrm_count_pfkey_enc_supported(void);
1685struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1686struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1687struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1688struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1689struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1690struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1691struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1692struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1693struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1694 int probe);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001695
YOSHIFUJI Hideaki / 吉藤英明ff88b302013-01-29 12:48:31 +00001696static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1697 const xfrm_address_t *b)
1698{
1699 return ipv6_addr_equal((const struct in6_addr *)a,
1700 (const struct in6_addr *)b);
1701}
1702
YOSHIFUJI Hideaki / 吉藤英明70e94e62013-01-29 12:48:50 +00001703static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1704 const xfrm_address_t *b,
1705 sa_family_t family)
1706{
1707 switch (family) {
1708 default:
1709 case AF_INET:
1710 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1711 case AF_INET6:
1712 return xfrm6_addr_equal(a, b);
1713 }
1714}
1715
Herbert Xu77d8d7a2005-10-05 12:15:12 -07001716static inline int xfrm_policy_id2dir(u32 index)
1717{
1718 return index & 7;
1719}
1720
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001721#ifdef CONFIG_XFRM
1722static inline int xfrm_aevent_is_on(struct net *net)
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001723{
Patrick McHardybe336902006-03-20 22:40:54 -08001724 struct sock *nlsk;
1725 int ret = 0;
1726
1727 rcu_read_lock();
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001728 nlsk = rcu_dereference(net->xfrm.nlsk);
Patrick McHardybe336902006-03-20 22:40:54 -08001729 if (nlsk)
1730 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1731 rcu_read_unlock();
1732 return ret;
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001733}
Horia Geanta0f245582014-02-12 16:20:06 +02001734
1735static inline int xfrm_acquire_is_on(struct net *net)
1736{
1737 struct sock *nlsk;
1738 int ret = 0;
1739
1740 rcu_read_lock();
1741 nlsk = rcu_dereference(net->xfrm.nlsk);
1742 if (nlsk)
1743 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1744 rcu_read_unlock();
1745
1746 return ret;
1747}
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001748#endif
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001749
Alexey Dobriyan373b8ee2017-09-21 23:45:43 +03001750static inline unsigned int aead_len(struct xfrm_algo_aead *alg)
Steffen Klassertee5c2312014-02-19 13:33:24 +01001751{
1752 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1753}
1754
Alexey Dobriyan06cd22f2017-09-21 23:46:30 +03001755static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
Eric Dumazet0f99be02008-01-08 23:39:06 -08001756{
1757 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1758}
1759
Alexey Dobriyan1bd963a2017-09-21 23:47:09 +03001760static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
Martin Willi4447bb32009-11-25 00:29:52 +00001761{
1762 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1763}
1764
Alexey Dobriyan5e708e42017-09-21 23:47:50 +03001765static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
Steffen Klassert9736acf2011-03-08 00:05:43 +00001766{
1767 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1768}
1769
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001770#ifdef CONFIG_XFRM_MIGRATE
Steffen Klassertaf2f4642011-03-28 19:46:39 +00001771static inline int xfrm_replay_clone(struct xfrm_state *x,
1772 struct xfrm_state *orig)
1773{
1774 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1775 GFP_KERNEL);
1776 if (!x->replay_esn)
1777 return -ENOMEM;
1778
1779 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1780 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1781
1782 x->preplay_esn = kmemdup(x->replay_esn,
1783 xfrm_replay_state_esn_len(x->replay_esn),
1784 GFP_KERNEL);
1785 if (!x->preplay_esn) {
1786 kfree(x->replay_esn);
1787 return -ENOMEM;
1788 }
1789
1790 return 0;
1791}
1792
Steffen Klassertee5c2312014-02-19 13:33:24 +01001793static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1794{
1795 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1796}
1797
1798
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001799static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1800{
Eric Dumazet0f99be02008-01-08 23:39:06 -08001801 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001802}
1803
Martin Willi4447bb32009-11-25 00:29:52 +00001804static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1805{
1806 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1807}
1808
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001809static inline void xfrm_states_put(struct xfrm_state **states, int n)
1810{
1811 int i;
1812 for (i = 0; i < n; i++)
1813 xfrm_state_put(*(states + i));
1814}
1815
1816static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1817{
1818 int i;
1819 for (i = 0; i < n; i++)
1820 xfrm_state_delete(*(states + i));
1821}
1822#endif
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001823
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -07001824#ifdef CONFIG_XFRM
Herbert Xu00501122007-12-11 01:53:43 -08001825static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1826{
Florian Westphal2294be0f2018-12-18 17:15:20 +01001827 struct sec_path *sp = skb_sec_path(skb);
1828
1829 return sp->xvec[sp->len - 1];
Herbert Xu00501122007-12-11 01:53:43 -08001830}
Steffen Klassertf53c7232017-12-20 10:41:36 +01001831#endif
1832
Steffen Klassert54ef2072017-02-15 09:39:54 +01001833static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1834{
Steffen Klassertf53c7232017-12-20 10:41:36 +01001835#ifdef CONFIG_XFRM
Florian Westphal2294be0f2018-12-18 17:15:20 +01001836 struct sec_path *sp = skb_sec_path(skb);
Steffen Klassert54ef2072017-02-15 09:39:54 +01001837
1838 if (!sp || !sp->olen || sp->len != sp->olen)
1839 return NULL;
1840
1841 return &sp->ovec[sp->olen - 1];
Steffen Klassertf53c7232017-12-20 10:41:36 +01001842#else
1843 return NULL;
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -07001844#endif
Steffen Klassertf53c7232017-12-20 10:41:36 +01001845}
Herbert Xu00501122007-12-11 01:53:43 -08001846
Kirill Tkhaie9a441b2018-03-29 17:03:25 +03001847void __init xfrm_dev_init(void);
Hangbin Liub81f884a2017-06-01 14:57:56 +08001848
1849#ifdef CONFIG_XFRM_OFFLOAD
Steffen Klassertf53c7232017-12-20 10:41:36 +01001850void xfrm_dev_resume(struct sk_buff *skb);
1851void xfrm_dev_backlog(struct softnet_data *sd);
1852struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again);
Steffen Klassertd77e38e2017-04-14 10:06:10 +02001853int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
1854 struct xfrm_user_offload *xuo);
1855bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
1856
Yossef Efraim50bd8702018-01-14 11:39:10 +02001857static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1858{
1859 struct xfrm_state_offload *xso = &x->xso;
1860
1861 if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn)
1862 xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x);
1863}
1864
Steffen Klassertf70f2502017-08-01 12:49:10 +03001865static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1866{
1867 struct xfrm_state *x = dst->xfrm;
David Millerb6ca8bd2017-11-28 15:45:44 -05001868 struct xfrm_dst *xdst;
Steffen Klassertf70f2502017-08-01 12:49:10 +03001869
1870 if (!x || !x->type_offload)
1871 return false;
1872
David Millerb6ca8bd2017-11-28 15:45:44 -05001873 xdst = (struct xfrm_dst *) dst;
Steffen Klassert2271d512017-12-20 10:41:48 +01001874 if (!x->xso.offload_handle && !xdst->child->xfrm)
1875 return true;
David Miller0f6c4802017-11-28 15:40:46 -05001876 if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) &&
David Millerb6ca8bd2017-11-28 15:45:44 -05001877 !xdst->child->xfrm)
Steffen Klassertf70f2502017-08-01 12:49:10 +03001878 return true;
1879
1880 return false;
1881}
1882
Steffen Klassertd77e38e2017-04-14 10:06:10 +02001883static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1884{
1885 struct xfrm_state_offload *xso = &x->xso;
1886
1887 if (xso->dev)
1888 xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
1889}
1890
1891static inline void xfrm_dev_state_free(struct xfrm_state *x)
1892{
1893 struct xfrm_state_offload *xso = &x->xso;
Colin Ian King77990462018-12-06 17:52:28 +00001894 struct net_device *dev = xso->dev;
Steffen Klassertd77e38e2017-04-14 10:06:10 +02001895
1896 if (dev && dev->xfrmdev_ops) {
Shannon Nelson7f05b462017-12-19 15:35:47 -08001897 if (dev->xfrmdev_ops->xdo_dev_state_free)
1898 dev->xfrmdev_ops->xdo_dev_state_free(x);
Steffen Klassertd77e38e2017-04-14 10:06:10 +02001899 xso->dev = NULL;
1900 dev_put(dev);
1901 }
1902}
1903#else
Steffen Klassertf53c7232017-12-20 10:41:36 +01001904static inline void xfrm_dev_resume(struct sk_buff *skb)
1905{
1906}
1907
1908static inline void xfrm_dev_backlog(struct softnet_data *sd)
1909{
1910}
1911
1912static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again)
Steffen Klassertf6e27112017-04-14 10:07:28 +02001913{
Steffen Klassert3dca3f32017-12-20 10:41:31 +01001914 return skb;
Steffen Klassertf6e27112017-04-14 10:07:28 +02001915}
1916
Steffen Klassertd77e38e2017-04-14 10:06:10 +02001917static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
1918{
1919 return 0;
1920}
1921
1922static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1923{
1924}
1925
1926static inline void xfrm_dev_state_free(struct xfrm_state *x)
1927{
1928}
1929
1930static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
1931{
1932 return false;
1933}
Steffen Klassertf70f2502017-08-01 12:49:10 +03001934
Yossef Efraim50bd8702018-01-14 11:39:10 +02001935static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1936{
1937}
1938
Steffen Klassertf70f2502017-08-01 12:49:10 +03001939static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1940{
1941 return false;
1942}
Steffen Klassertd77e38e2017-04-14 10:06:10 +02001943#endif
1944
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +00001945static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1946{
1947 if (attrs[XFRMA_MARK])
Andreas Steffen4efd7e82010-06-30 10:41:15 -07001948 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +00001949 else
1950 m->v = m->m = 0;
1951
1952 return m->v & m->m;
1953}
1954
David S. Millere3dfa382011-02-27 23:20:19 -08001955static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +00001956{
David S. Miller1d1e34d2012-06-27 21:57:03 -07001957 int ret = 0;
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +00001958
David S. Miller1d1e34d2012-06-27 21:57:03 -07001959 if (m->m | m->v)
1960 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1961 return ret;
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +00001962}
1963
Steffen Klassert9b42c1f2018-06-12 12:44:26 +02001964static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x)
1965{
1966 struct xfrm_mark *m = &x->props.smark;
1967
1968 return (m->v & m->m) | (mark & ~m->m);
1969}
1970
Steffen Klassert7e652642018-06-12 14:07:07 +02001971static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id)
1972{
1973 int ret = 0;
1974
1975 if (if_id)
1976 ret = nla_put_u32(skb, XFRMA_IF_ID, if_id);
1977 return ret;
1978}
1979
Steffen Klassert70be6c92014-02-21 08:41:09 +01001980static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1981 unsigned int family)
1982{
1983 bool tunnel = false;
1984
1985 switch(family) {
1986 case AF_INET:
1987 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
1988 tunnel = true;
1989 break;
1990 case AF_INET6:
1991 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
1992 tunnel = true;
1993 break;
1994 }
Florian Westphalc9500d72019-03-29 21:16:32 +01001995 if (tunnel && !(x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL))
Steffen Klassert70be6c92014-02-21 08:41:09 +01001996 return -EINVAL;
1997
1998 return 0;
1999}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002000#endif /* _NET_XFRM_H */