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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _NET_XFRM_H
2#define _NET_XFRM_H
3
Herbert Xuaabc9762005-05-03 16:27:10 -07004#include <linux/compiler.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07005#include <linux/xfrm.h>
6#include <linux/spinlock.h>
7#include <linux/list.h>
8#include <linux/skbuff.h>
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -02009#include <linux/socket.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/pfkeyv2.h>
Masahide NAKAMURA57947082006-09-22 15:06:24 -070011#include <linux/ipsec.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/in6.h>
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -080013#include <linux/mutex.h>
Joy Lattenab5f5e82007-09-17 11:51:22 -070014#include <linux/audit.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090015#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016
17#include <net/sock.h>
18#include <net/dst.h>
Herbert Xu436a0a42007-10-08 17:25:53 -070019#include <net/ip.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <net/route.h>
21#include <net/ipv6.h>
22#include <net/ip6_fib.h>
Hannes Frederic Sowa0ea9d5e2013-08-13 04:35:58 +020023#include <net/ip6_route.h>
Timo Teräsfe1a5f02010-04-07 00:30:04 +000024#include <net/flow.h>
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -080025
26#include <linux/interrupt.h>
27
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -080028#ifdef CONFIG_XFRM_STATISTICS
29#include <net/snmp.h>
30#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070031
Masahide NAKAMURAd3d6dd32007-06-26 23:57:49 -070032#define XFRM_PROTO_ESP 50
33#define XFRM_PROTO_AH 51
34#define XFRM_PROTO_COMP 108
35#define XFRM_PROTO_IPIP 4
36#define XFRM_PROTO_IPV6 41
37#define XFRM_PROTO_ROUTING IPPROTO_ROUTING
38#define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
39
Nicolas Dichtelfa9921e2011-02-02 06:29:02 +000040#define XFRM_ALIGN4(len) (((len) + 3) & ~3)
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#define XFRM_ALIGN8(len) (((len) + 7) & ~7)
Herbert Xub59f45d2006-05-27 23:05:54 -070042#define MODULE_ALIAS_XFRM_MODE(family, encap) \
43 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
Masahide NAKAMURAd3d6dd32007-06-26 23:57:49 -070044#define MODULE_ALIAS_XFRM_TYPE(family, proto) \
45 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -080047#ifdef CONFIG_XFRM_STATISTICS
Alexey Dobriyan59c99402008-11-25 17:59:52 -080048#define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
49#define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field)
50#define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field)
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -080051#else
Alexey Dobriyan59c99402008-11-25 17:59:52 -080052#define XFRM_INC_STATS(net, field) ((void)(net))
53#define XFRM_INC_STATS_BH(net, field) ((void)(net))
54#define XFRM_INC_STATS_USER(net, field) ((void)(net))
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -080055#endif
56
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -080057extern struct mutex xfrm_cfg_mutex;
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
59/* Organization of SPD aka "XFRM rules"
60 ------------------------------------
61
62 Basic objects:
63 - policy rule, struct xfrm_policy (=SPD entry)
64 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
65 - instance of a transformer, struct xfrm_state (=SA)
66 - template to clone xfrm_state, struct xfrm_tmpl
67
68 SPD is plain linear list of xfrm_policy rules, ordered by priority.
69 (To be compatible with existing pfkeyv2 implementations,
70 many rules with priority of 0x7fffffff are allowed to exist and
71 such rules are ordered in an unpredictable way, thanks to bsd folks.)
72
73 Lookup is plain linear search until the first match with selector.
74
75 If "action" is "block", then we prohibit the flow, otherwise:
76 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
77 policy entry has list of up to XFRM_MAX_DEPTH transformations,
78 described by templates xfrm_tmpl. Each template is resolved
79 to a complete xfrm_state (see below) and we pack bundle of transformations
80 to a dst_entry returned to requestor.
81
82 dst -. xfrm .-> xfrm_state #1
83 |---. child .-> dst -. xfrm .-> xfrm_state #2
84 |---. child .-> dst -. xfrm .-> xfrm_state #3
85 |---. child .-> NULL
86
87 Bundles are cached at xrfm_policy struct (field ->bundles).
88
89
90 Resolution of xrfm_tmpl
91 -----------------------
92 Template contains:
93 1. ->mode Mode: transport or tunnel
94 2. ->id.proto Protocol: AH/ESP/IPCOMP
95 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
96 Q: allow to resolve security gateway?
97 4. ->id.spi If not zero, static SPI.
98 5. ->saddr Local tunnel endpoint, ignored for transport mode.
99 6. ->algos List of allowed algos. Plain bitmask now.
100 Q: ealgos, aalgos, calgos. What a mess...
101 7. ->share Sharing mode.
102 Q: how to implement private sharing mode? To add struct sock* to
103 flow id?
104
105 Having this template we search through SAD searching for entries
106 with appropriate mode/proto/algo, permitted by selector.
107 If no appropriate entry found, it is requested from key manager.
108
109 PROBLEMS:
110 Q: How to find all the bundles referring to a physical path for
111 PMTU discovery? Seems, dst should contain list of all parents...
112 and enter to infinite locking hierarchy disaster.
113 No! It is easier, we will not search for them, let them find us.
114 We add genid to each dst plus pointer to genid of raw IP route,
115 pmtu disc will update pmtu on raw IP route and increase its genid.
116 dst_check() will see this for top level and trigger resyncing
117 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
118 */
119
Herbert Xu12a169e2008-10-01 07:03:24 -0700120struct xfrm_state_walk {
121 struct list_head all;
122 u8 state;
123 union {
124 u8 dying;
125 u8 proto;
126 };
127 u32 seq;
128};
129
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130/* Full description of state of transformer. */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000131struct xfrm_state {
Alexey Dobriyan673c09b2008-11-25 17:15:16 -0800132#ifdef CONFIG_NET_NS
133 struct net *xs_net;
134#endif
Herbert Xuabb81c42008-09-09 19:58:29 -0700135 union {
Herbert Xu12a169e2008-10-01 07:03:24 -0700136 struct hlist_node gclist;
Herbert Xuabb81c42008-09-09 19:58:29 -0700137 struct hlist_node bydst;
138 };
David S. Miller8f126e32006-08-24 02:45:07 -0700139 struct hlist_node bysrc;
140 struct hlist_node byspi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
142 atomic_t refcnt;
143 spinlock_t lock;
144
145 struct xfrm_id id;
146 struct xfrm_selector sel;
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +0000147 struct xfrm_mark mark;
Martin Willi35d28562010-12-08 04:37:49 +0000148 u32 tfcpad;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
David S. Miller9d4a7062006-08-24 03:18:09 -0700150 u32 genid;
151
Herbert Xu12a169e2008-10-01 07:03:24 -0700152 /* Key manager bits */
153 struct xfrm_state_walk km;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
155 /* Parameters of this state. */
156 struct {
157 u32 reqid;
158 u8 mode;
159 u8 replay_window;
160 u8 aalgo, ealgo, calgo;
161 u8 flags;
162 u16 family;
163 xfrm_address_t saddr;
164 int header_len;
165 int trailer_len;
Nicolas Dichtela947b0a2013-02-22 10:54:54 +0100166 u32 extra_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 } props;
168
169 struct xfrm_lifetime_cfg lft;
170
171 /* Data for transformer */
Martin Willi4447bb32009-11-25 00:29:52 +0000172 struct xfrm_algo_auth *aalg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 struct xfrm_algo *ealg;
174 struct xfrm_algo *calg;
Herbert Xu1a6509d2008-01-28 19:37:29 -0800175 struct xfrm_algo_aead *aead;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176
177 /* Data for encapsulator */
178 struct xfrm_encap_tmpl *encap;
179
Noriaki TAKAMIYA060f02a2006-08-23 18:18:55 -0700180 /* Data for care-of address */
181 xfrm_address_t *coaddr;
182
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
184 struct xfrm_state *tunnel;
185
186 /* If a tunnel, number of users + 1 */
187 atomic_t tunnel_users;
188
189 /* State for replay detection */
190 struct xfrm_replay_state replay;
Steffen Klassert9736acf2011-03-08 00:05:43 +0000191 struct xfrm_replay_state_esn *replay_esn;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800193 /* Replay detection state at the time we sent the last notification */
194 struct xfrm_replay_state preplay;
Steffen Klassert9736acf2011-03-08 00:05:43 +0000195 struct xfrm_replay_state_esn *preplay_esn;
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800196
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000197 /* The functions for replay detection. */
198 struct xfrm_replay *repl;
199
Jamal Hadi Salim27170962006-04-14 15:03:05 -0700200 /* internal flag that only holds state for delayed aevent at the
201 * moment
202 */
203 u32 xflags;
204
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800205 /* Replay detection notification settings */
206 u32 replay_maxage;
207 u32 replay_maxdiff;
208
209 /* Replay detection notification timer */
210 struct timer_list rtimer;
211
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 /* Statistics */
213 struct xfrm_stats stats;
214
215 struct xfrm_lifetime_cur curlft;
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -0800216 struct tasklet_hrtimer mtimer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217
Fan Due3c0d042012-07-30 21:43:54 +0000218 /* used to fix curlft->add_time when changing date */
219 long saved_tmo;
220
Masahide NAKAMURA9afaca02006-08-23 18:20:16 -0700221 /* Last used time */
Herbert Xud26f3982007-11-13 21:47:08 -0800222 unsigned long lastused;
Masahide NAKAMURA9afaca02006-08-23 18:20:16 -0700223
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 /* Reference to data common to all the instances of this
225 * transformer. */
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800226 const struct xfrm_type *type;
Herbert Xu13996372007-10-17 21:35:51 -0700227 struct xfrm_mode *inner_mode;
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -0700228 struct xfrm_mode *inner_mode_iaf;
Herbert Xu13996372007-10-17 21:35:51 -0700229 struct xfrm_mode *outer_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
Trent Jaegerdf718372005-12-13 23:12:27 -0800231 /* Security context */
232 struct xfrm_sec_ctx *security;
233
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 /* Private data of this transformer, format is opaque,
235 * interpreted by xfrm_type methods. */
236 void *data;
237};
238
Alexey Dobriyan673c09b2008-11-25 17:15:16 -0800239static inline struct net *xs_net(struct xfrm_state *x)
240{
241 return read_pnet(&x->xs_net);
242}
243
Jamal Hadi Salim27170962006-04-14 15:03:05 -0700244/* xflags - make enum if more show up */
245#define XFRM_TIME_DEFER 1
Fan Due3c0d042012-07-30 21:43:54 +0000246#define XFRM_SOFT_EXPIRE 2
Jamal Hadi Salim27170962006-04-14 15:03:05 -0700247
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248enum {
249 XFRM_STATE_VOID,
250 XFRM_STATE_ACQ,
251 XFRM_STATE_VALID,
252 XFRM_STATE_ERROR,
253 XFRM_STATE_EXPIRED,
254 XFRM_STATE_DEAD
255};
256
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700257/* callback structure passed from either netlink or pfkey */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000258struct km_event {
Herbert Xubf088672005-06-18 22:44:00 -0700259 union {
260 u32 hard;
261 u32 proto;
262 u32 byid;
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800263 u32 aevent;
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -0700264 u32 type;
Herbert Xubf088672005-06-18 22:44:00 -0700265 } data;
266
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700267 u32 seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +0000268 u32 portid;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700269 u32 event;
Alexey Dobriyan70678022008-11-25 17:50:36 -0800270 struct net *net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700271};
272
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000273struct xfrm_replay {
274 void (*advance)(struct xfrm_state *x, __be32 net_seq);
275 int (*check)(struct xfrm_state *x,
276 struct sk_buff *skb,
277 __be32 net_seq);
Steffen Klassert3b59df42012-09-04 00:03:29 +0000278 int (*recheck)(struct xfrm_state *x,
279 struct sk_buff *skb,
280 __be32 net_seq);
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000281 void (*notify)(struct xfrm_state *x, int event);
282 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
283};
284
Herbert Xu25ee3282007-12-11 09:32:34 -0800285struct net_device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286struct xfrm_type;
287struct xfrm_dst;
288struct xfrm_policy_afinfo {
289 unsigned short family;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 struct dst_ops *dst_ops;
Alexey Dobriyanddcfd792008-11-25 17:37:23 -0800291 void (*garbage_collect)(struct net *net);
Alexey Dobriyanc5b3cf42008-11-25 17:51:25 -0800292 struct dst_entry *(*dst_lookup)(struct net *net, int tos,
David S. Miller5e6b9302011-02-24 00:14:45 -0500293 const xfrm_address_t *saddr,
294 const xfrm_address_t *daddr);
Alexey Dobriyanfbda33b2008-11-25 17:56:49 -0800295 int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 void (*decode_session)(struct sk_buff *skb,
Herbert Xud5422ef2007-12-12 10:44:16 -0800297 struct flowi *fl,
298 int reverse);
David S. Miller05d84022011-02-22 17:47:10 -0800299 int (*get_tos)(const struct flowi *fl);
Patrick McHardy9d7b0fc2012-08-20 02:56:56 -0700300 void (*init_dst)(struct net *net,
301 struct xfrm_dst *dst);
Masahide NAKAMURAa1b05142007-12-20 20:41:12 -0800302 int (*init_path)(struct xfrm_dst *path,
303 struct dst_entry *dst,
304 int nfheader_len);
Herbert Xu25ee3282007-12-11 09:32:34 -0800305 int (*fill_dst)(struct xfrm_dst *xdst,
Herbert Xu87c1e122010-03-02 02:51:56 +0000306 struct net_device *dev,
David S. Miller0c7b3ee2011-02-22 17:48:57 -0800307 const struct flowi *fl);
David S. Miller2774c132011-03-01 14:59:04 -0800308 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309};
310
311extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
312extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
David S. Miller214e0052011-02-24 00:02:38 -0500313extern void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c);
314extern void km_state_notify(struct xfrm_state *x, const struct km_event *c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315
316struct xfrm_tmpl;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -0800317extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
Eric W. Biederman15e47302012-09-07 20:12:54 +0000318extern void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -0800319extern int __xfrm_state_delete(struct xfrm_state *x);
320
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321struct xfrm_state_afinfo {
Herbert Xu17c2a422007-10-17 21:33:12 -0700322 unsigned int family;
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800323 unsigned int proto;
Al Viro8e3d7162008-03-17 22:49:16 -0700324 __be16 eth_proto;
Herbert Xu17c2a422007-10-17 21:33:12 -0700325 struct module *owner;
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800326 const struct xfrm_type *type_map[IPPROTO_MAX];
Herbert Xuaa5d62c2007-10-17 21:31:12 -0700327 struct xfrm_mode *mode_map[XFRM_MODE_MAX];
Herbert Xud094cd82005-06-20 13:19:41 -0700328 int (*init_flags)(struct xfrm_state *x);
David S. Miller73e5ebb2011-02-22 17:51:44 -0800329 void (*init_tempsel)(struct xfrm_selector *sel,
330 const struct flowi *fl);
David S. Miller19bd6242011-02-24 00:07:20 -0500331 void (*init_temprop)(struct xfrm_state *x,
332 const struct xfrm_tmpl *tmpl,
333 const xfrm_address_t *daddr,
334 const xfrm_address_t *saddr);
Masahide NAKAMURA41a49cc2006-08-23 22:48:31 -0700335 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
336 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
Miika Komucdca7262007-02-06 14:24:56 -0800337 int (*output)(struct sk_buff *skb);
Steffen Klassert43a4dea2011-05-09 19:36:38 +0000338 int (*output_finish)(struct sk_buff *skb);
Herbert Xu227620e2007-11-13 21:41:28 -0800339 int (*extract_input)(struct xfrm_state *x,
340 struct sk_buff *skb);
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800341 int (*extract_output)(struct xfrm_state *x,
342 struct sk_buff *skb);
Herbert Xu716062f2007-11-13 21:44:23 -0800343 int (*transport_finish)(struct sk_buff *skb,
344 int async);
Hannes Frederic Sowa628e3412013-08-14 13:05:23 +0200345 void (*local_error)(struct sk_buff *skb, u32 mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346};
347
348extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
349extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
Hannes Frederic Sowa628e3412013-08-14 13:05:23 +0200350extern struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
351extern void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352
353extern void xfrm_state_delete_tunnel(struct xfrm_state *x);
354
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000355struct xfrm_type {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 char *description;
357 struct module *owner;
jamala6337462010-02-09 13:21:17 +0000358 u8 proto;
359 u8 flags;
Masahide NAKAMURA1b5c2292006-08-23 18:11:50 -0700360#define XFRM_TYPE_NON_FRAGMENT 1
Herbert Xu436a0a42007-10-08 17:25:53 -0700361#define XFRM_TYPE_REPLAY_PROT 2
Herbert Xuf04e7e82007-11-13 21:36:51 -0800362#define XFRM_TYPE_LOCAL_COADDR 4
363#define XFRM_TYPE_REMOTE_COADDR 8
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
Herbert Xu72cb6962005-06-20 13:18:08 -0700365 int (*init_state)(struct xfrm_state *x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 void (*destructor)(struct xfrm_state *);
Herbert Xue6956332006-04-01 00:52:46 -0800367 int (*input)(struct xfrm_state *, struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
David S. Miller8f029de2011-02-22 17:59:59 -0800369 int (*reject)(struct xfrm_state *, struct sk_buff *,
370 const struct flowi *);
Masahide NAKAMURAaee5adb2006-08-23 17:57:28 -0700371 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 /* Estimate maximal size of result of transformation of a dgram */
Patrick McHardyc5c25232007-04-09 11:47:18 -0700373 u32 (*get_mtu)(struct xfrm_state *, int size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374};
375
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800376extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
377extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
Herbert Xub59f45d2006-05-27 23:05:54 -0700379struct xfrm_mode {
Herbert Xu227620e2007-11-13 21:41:28 -0800380 /*
381 * Remove encapsulation header.
382 *
383 * The IP header will be moved over the top of the encapsulation
384 * header.
385 *
386 * On entry, the transport header shall point to where the IP header
387 * should be and the network header shall be set to where the IP
388 * header currently is. skb->data shall point to the start of the
389 * payload.
390 */
391 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
392
393 /*
394 * This is the actual input entry point.
395 *
396 * For transport mode and equivalent this would be identical to
397 * input2 (which does not need to be set). While tunnel mode
398 * and equivalent would set this to the tunnel encapsulation function
399 * xfrm4_prepare_input that would in turn call input2.
400 */
Herbert Xub59f45d2006-05-27 23:05:54 -0700401 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
Herbert Xu37fedd32007-10-10 15:44:44 -0700402
403 /*
404 * Add encapsulation header.
405 *
406 * On exit, the transport header will be set to the start of the
407 * encapsulation header to be filled in by x->type->output and
408 * the mac header will be set to the nextheader (protocol for
409 * IPv4) field of the extension header directly preceding the
410 * encapsulation header, or in its absence, that of the top IP
411 * header. The value of the network header will always point
412 * to the top IP header while skb->data will point to the payload.
413 */
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800414 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
415
416 /*
417 * This is the actual output entry point.
418 *
419 * For transport mode and equivalent this would be identical to
420 * output2 (which does not need to be set). While tunnel mode
421 * and equivalent would set this to a tunnel encapsulation function
422 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
423 * call output2.
424 */
425 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
Herbert Xub59f45d2006-05-27 23:05:54 -0700426
Herbert Xu17c2a422007-10-17 21:33:12 -0700427 struct xfrm_state_afinfo *afinfo;
Herbert Xub59f45d2006-05-27 23:05:54 -0700428 struct module *owner;
429 unsigned int encap;
Herbert Xu1bfcb102007-10-17 21:31:50 -0700430 int flags;
431};
432
433/* Flags for xfrm_mode. */
434enum {
435 XFRM_MODE_FLAG_TUNNEL = 1,
Herbert Xub59f45d2006-05-27 23:05:54 -0700436};
437
438extern int xfrm_register_mode(struct xfrm_mode *mode, int family);
439extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
Herbert Xub59f45d2006-05-27 23:05:54 -0700440
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -0700441static inline int xfrm_af2proto(unsigned int family)
442{
443 switch(family) {
444 case AF_INET:
445 return IPPROTO_IPIP;
446 case AF_INET6:
447 return IPPROTO_IPV6;
448 default:
449 return 0;
450 }
451}
452
453static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
454{
455 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
456 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
457 return x->inner_mode;
458 else
459 return x->inner_mode_iaf;
460}
461
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000462struct xfrm_tmpl {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463/* id in template is interpreted as:
464 * daddr - destination of tunnel, may be zero for transport mode.
465 * spi - zero to acquire spi. Not zero if spi is static, then
466 * daddr must be fixed too.
467 * proto - AH/ESP/IPCOMP
468 */
469 struct xfrm_id id;
470
471/* Source address of tunnel. Ignored, if it is not a tunnel. */
472 xfrm_address_t saddr;
473
Miika Komu76b3f052006-11-30 16:40:43 -0800474 unsigned short encap_family;
475
jamala6337462010-02-09 13:21:17 +0000476 u32 reqid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
Masahide NAKAMURA7e49e6d2006-09-22 15:05:15 -0700478/* Mode: transport, tunnel etc. */
jamala6337462010-02-09 13:21:17 +0000479 u8 mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
481/* Sharing mode: unique, this session only, this user only etc. */
jamala6337462010-02-09 13:21:17 +0000482 u8 share;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483
484/* May skip this transfomration if no SA is found */
jamala6337462010-02-09 13:21:17 +0000485 u8 optional;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486
Herbert Xuc5d18e92008-04-22 00:46:42 -0700487/* Skip aalgos/ealgos/calgos checks. */
jamala6337462010-02-09 13:21:17 +0000488 u8 allalgs;
Herbert Xuc5d18e92008-04-22 00:46:42 -0700489
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490/* Bit mask of algos allowed for acquisition */
jamala6337462010-02-09 13:21:17 +0000491 u32 aalgos;
492 u32 ealgos;
493 u32 calgos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494};
495
Masahide NAKAMURA622dc822006-08-23 17:52:01 -0700496#define XFRM_MAX_DEPTH 6
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497
Herbert Xu12a169e2008-10-01 07:03:24 -0700498struct xfrm_policy_walk_entry {
499 struct list_head all;
500 u8 dead;
501};
502
503struct xfrm_policy_walk {
504 struct xfrm_policy_walk_entry walk;
505 u8 type;
506 u32 seq;
507};
508
Steffen Klasserta0073fe2013-02-05 12:52:55 +0100509struct xfrm_policy_queue {
510 struct sk_buff_head hold_queue;
511 struct timer_list hold_timer;
512 unsigned long timeout;
513};
514
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000515struct xfrm_policy {
Alexey Dobriyan0331b1f2008-11-25 17:21:45 -0800516#ifdef CONFIG_NET_NS
517 struct net *xp_net;
518#endif
David S. Miller2518c7c2006-08-24 04:45:07 -0700519 struct hlist_node bydst;
520 struct hlist_node byidx;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521
522 /* This lock only affects elements except for entry. */
523 rwlock_t lock;
524 atomic_t refcnt;
525 struct timer_list timer;
526
Timo Teräsfe1a5f02010-04-07 00:30:04 +0000527 struct flow_cache_object flo;
Timo Teräs80c802f2010-04-07 00:30:05 +0000528 atomic_t genid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 u32 priority;
530 u32 index;
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +0000531 struct xfrm_mark mark;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 struct xfrm_selector selector;
533 struct xfrm_lifetime_cfg lft;
534 struct xfrm_lifetime_cur curlft;
Herbert Xu12a169e2008-10-01 07:03:24 -0700535 struct xfrm_policy_walk_entry walk;
Steffen Klasserta0073fe2013-02-05 12:52:55 +0100536 struct xfrm_policy_queue polq;
Arnaldo Carvalho de Melo46ca5f52006-11-27 17:58:59 -0200537 u8 type;
538 u8 action;
539 u8 flags;
Arnaldo Carvalho de Melo46ca5f52006-11-27 17:58:59 -0200540 u8 xfrm_nr;
Herbert Xu12a169e2008-10-01 07:03:24 -0700541 u16 family;
Trent Jaegerdf718372005-12-13 23:12:27 -0800542 struct xfrm_sec_ctx *security;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
544};
545
David S. Miller63eb23f2011-02-24 01:25:19 -0500546static inline struct net *xp_net(const struct xfrm_policy *xp)
Alexey Dobriyan0331b1f2008-11-25 17:21:45 -0800547{
548 return read_pnet(&xp->xp_net);
549}
550
Arnaud Ebalard13c1d182008-10-05 13:33:42 -0700551struct xfrm_kmaddress {
552 xfrm_address_t local;
553 xfrm_address_t remote;
554 u32 reserved;
555 u16 family;
556};
557
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -0800558struct xfrm_migrate {
559 xfrm_address_t old_daddr;
560 xfrm_address_t old_saddr;
561 xfrm_address_t new_daddr;
562 xfrm_address_t new_saddr;
563 u8 proto;
564 u8 mode;
565 u16 reserved;
566 u32 reqid;
567 u16 old_family;
568 u16 new_family;
569};
570
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800571#define XFRM_KM_TIMEOUT 30
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800572/* what happened */
573#define XFRM_REPLAY_UPDATE XFRM_AE_CR
574#define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
575
576/* default aevent timeout in units of 100ms */
577#define XFRM_AE_ETIME 10
578/* Async Event timer multiplier */
579#define XFRM_AE_ETH_M 10
580/* default seq threshold size */
581#define XFRM_AE_SEQT_SIZE 2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000583struct xfrm_mgr {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 struct list_head list;
585 char *id;
David S. Miller214e0052011-02-24 00:02:38 -0500586 int (*notify)(struct xfrm_state *x, const struct km_event *c);
Fan Du65e07362012-08-15 10:13:47 +0800587 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
Venkat Yekkiralacb969f02006-07-24 23:32:20 -0700588 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
Al Viro5d36b182006-11-08 00:24:06 -0800589 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
David S. Miller214e0052011-02-24 00:02:38 -0500590 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
Alexey Dobriyandb983c12008-11-25 17:51:01 -0800591 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
David S. Miller183cad12011-02-24 00:28:01 -0500592 int (*migrate)(const struct xfrm_selector *sel,
593 u8 dir, u8 type,
594 const struct xfrm_migrate *m,
595 int num_bundles,
596 const struct xfrm_kmaddress *k);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597};
598
599extern int xfrm_register_km(struct xfrm_mgr *km);
600extern int xfrm_unregister_km(struct xfrm_mgr *km);
601
Herbert Xu436a0a42007-10-08 17:25:53 -0700602/*
603 * This structure is used for the duration where packets are being
604 * transformed by IPsec. As soon as the packet leaves IPsec the
605 * area beyond the generic IP part may be overwritten.
606 */
607struct xfrm_skb_cb {
608 union {
609 struct inet_skb_parm h4;
610 struct inet6_skb_parm h6;
611 } header;
612
613 /* Sequence number for replay protection. */
Herbert Xub318e0e2008-02-12 22:50:35 -0800614 union {
Steffen Klassert1ce36442011-03-08 00:06:31 +0000615 struct {
616 __u32 low;
617 __u32 hi;
618 } output;
619 struct {
620 __be32 low;
621 __be32 hi;
622 } input;
Herbert Xub318e0e2008-02-12 22:50:35 -0800623 } seq;
Herbert Xu436a0a42007-10-08 17:25:53 -0700624};
625
626#define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
627
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800628/*
629 * This structure is used by the afinfo prepare_input/prepare_output functions
630 * to transmit header information to the mode input/output functions.
631 */
632struct xfrm_mode_skb_cb {
633 union {
634 struct inet_skb_parm h4;
635 struct inet6_skb_parm h6;
636 } header;
637
638 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
639 __be16 id;
640 __be16 frag_off;
641
Herbert Xu732c8bd2008-03-26 16:51:09 -0700642 /* IP header length (excluding options or extension headers). */
643 u8 ihl;
644
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800645 /* TOS for IPv4, class for IPv6. */
646 u8 tos;
647
648 /* TTL for IPv4, hop limitfor IPv6. */
649 u8 ttl;
650
651 /* Protocol for IPv4, NH for IPv6. */
652 u8 protocol;
653
Herbert Xu732c8bd2008-03-26 16:51:09 -0700654 /* Option length for IPv4, zero for IPv6. */
655 u8 optlen;
656
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800657 /* Used by IPv6 only, zero for IPv4. */
658 u8 flow_lbl[3];
659};
660
661#define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
662
Herbert Xu716062f2007-11-13 21:44:23 -0800663/*
664 * This structure is used by the input processing to locate the SPI and
665 * related information.
666 */
667struct xfrm_spi_skb_cb {
668 union {
669 struct inet_skb_parm h4;
670 struct inet6_skb_parm h6;
671 } header;
672
Herbert Xu716062f2007-11-13 21:44:23 -0800673 unsigned int daddroff;
Herbert Xu2fcb45b2007-12-03 22:54:12 -0800674 unsigned int family;
Herbert Xu716062f2007-11-13 21:44:23 -0800675};
676
677#define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
678
Joy Latten161a09e2006-11-27 13:11:54 -0600679/* Audit Information */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000680struct xfrm_audit {
Joy Latten161a09e2006-11-27 13:11:54 -0600681 u32 secid;
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700682 kuid_t loginuid;
Eric Paris25323862008-04-18 10:09:25 -0400683 u32 sessionid;
Joy Latten161a09e2006-11-27 13:11:54 -0600684};
Joy Lattenc9204d92006-11-30 15:50:43 -0600685
686#ifdef CONFIG_AUDITSYSCALL
Paul Mooreafeb14b2007-12-21 14:58:11 -0800687static inline struct audit_buffer *xfrm_audit_start(const char *op)
Joy Lattenab5f5e82007-09-17 11:51:22 -0700688{
689 struct audit_buffer *audit_buf = NULL;
Paul Mooreafeb14b2007-12-21 14:58:11 -0800690
691 if (audit_enabled == 0)
692 return NULL;
693 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
694 AUDIT_MAC_IPSEC_EVENT);
695 if (audit_buf == NULL)
696 return NULL;
697 audit_log_format(audit_buf, "op=%s", op);
698 return audit_buf;
699}
700
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700701static inline void xfrm_audit_helper_usrinfo(kuid_t auid, u32 ses, u32 secid,
Paul Mooreafeb14b2007-12-21 14:58:11 -0800702 struct audit_buffer *audit_buf)
703{
Joy Lattenab5f5e82007-09-17 11:51:22 -0700704 char *secctx;
705 u32 secctx_len;
706
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700707 audit_log_format(audit_buf, " auid=%u ses=%u",
708 from_kuid(&init_user_ns, auid), ses);
Paul Moore68277ac2007-12-20 20:49:33 -0800709 if (secid != 0 &&
710 security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) {
Joy Lattenab5f5e82007-09-17 11:51:22 -0700711 audit_log_format(audit_buf, " subj=%s", secctx);
712 security_release_secctx(secctx, secctx_len);
713 } else
714 audit_log_task_context(audit_buf);
Joy Lattenab5f5e82007-09-17 11:51:22 -0700715}
716
717extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700718 kuid_t auid, u32 ses, u32 secid);
Joy Lattenab5f5e82007-09-17 11:51:22 -0700719extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700720 kuid_t auid, u32 ses, u32 secid);
Joy Lattenab5f5e82007-09-17 11:51:22 -0700721extern void xfrm_audit_state_add(struct xfrm_state *x, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700722 kuid_t auid, u32 ses, u32 secid);
Joy Lattenab5f5e82007-09-17 11:51:22 -0700723extern void xfrm_audit_state_delete(struct xfrm_state *x, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700724 kuid_t auid, u32 ses, u32 secid);
Paul Mooreafeb14b2007-12-21 14:58:11 -0800725extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
726 struct sk_buff *skb);
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000727extern void xfrm_audit_state_replay(struct xfrm_state *x,
728 struct sk_buff *skb, __be32 net_seq);
Paul Mooreafeb14b2007-12-21 14:58:11 -0800729extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
730extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
731 __be32 net_spi, __be32 net_seq);
732extern void xfrm_audit_state_icvfail(struct xfrm_state *x,
733 struct sk_buff *skb, u8 proto);
Joy Lattenc9204d92006-11-30 15:50:43 -0600734#else
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700735
736static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700737 kuid_t auid, u32 ses, u32 secid)
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700738{
739}
740
741static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700742 kuid_t auid, u32 ses, u32 secid)
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700743{
744}
745
746static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700747 kuid_t auid, u32 ses, u32 secid)
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700748{
749}
750
751static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700752 kuid_t auid, u32 ses, u32 secid)
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700753{
754}
755
756static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
757 struct sk_buff *skb)
758{
759}
760
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000761static inline void xfrm_audit_state_replay(struct xfrm_state *x,
762 struct sk_buff *skb, __be32 net_seq)
763{
764}
765
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700766static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
767 u16 family)
768{
769}
770
771static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
772 __be32 net_spi, __be32 net_seq)
773{
774}
775
776static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
777 struct sk_buff *skb, u8 proto)
778{
779}
Joy Lattenc9204d92006-11-30 15:50:43 -0600780#endif /* CONFIG_AUDITSYSCALL */
Joy Latten161a09e2006-11-27 13:11:54 -0600781
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782static inline void xfrm_pol_hold(struct xfrm_policy *policy)
783{
784 if (likely(policy != NULL))
785 atomic_inc(&policy->refcnt);
786}
787
WANG Cong64c31b32008-01-07 22:34:29 -0800788extern void xfrm_policy_destroy(struct xfrm_policy *policy);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789
790static inline void xfrm_pol_put(struct xfrm_policy *policy)
791{
792 if (atomic_dec_and_test(&policy->refcnt))
WANG Cong64c31b32008-01-07 22:34:29 -0800793 xfrm_policy_destroy(policy);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794}
795
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -0700796static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
797{
798 int i;
799 for (i = npols - 1; i >= 0; --i)
800 xfrm_pol_put(pols[i]);
801}
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -0700802
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803extern void __xfrm_state_destroy(struct xfrm_state *);
804
Herbert Xu21380b82006-02-22 14:47:13 -0800805static inline void __xfrm_state_put(struct xfrm_state *x)
806{
807 atomic_dec(&x->refcnt);
808}
809
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810static inline void xfrm_state_put(struct xfrm_state *x)
811{
812 if (atomic_dec_and_test(&x->refcnt))
813 __xfrm_state_destroy(x);
814}
815
816static inline void xfrm_state_hold(struct xfrm_state *x)
817{
818 atomic_inc(&x->refcnt);
819}
820
David S. Miller1744a8f2011-02-22 18:02:12 -0800821static inline bool addr_match(const void *token1, const void *token2,
822 int prefixlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823{
David S. Miller1744a8f2011-02-22 18:02:12 -0800824 const __be32 *a1 = token1;
825 const __be32 *a2 = token2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 int pdw;
827 int pbi;
828
jamala6337462010-02-09 13:21:17 +0000829 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
831
832 if (pdw)
833 if (memcmp(a1, a2, pdw << 2))
David S. Miller1744a8f2011-02-22 18:02:12 -0800834 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835
836 if (pbi) {
Al Viro5f193432006-09-27 18:46:32 -0700837 __be32 mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838
839 mask = htonl((0xffffffff) << (32 - pbi));
840
841 if ((a1[pdw] ^ a2[pdw]) & mask)
David S. Miller1744a8f2011-02-22 18:02:12 -0800842 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 }
844
David S. Miller1744a8f2011-02-22 18:02:12 -0800845 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846}
847
Alexey Dobriyan26bff942011-11-22 06:46:02 +0000848static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
849{
850 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
851 if (prefixlen == 0)
852 return true;
853 return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen)));
854}
855
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856static __inline__
David S. Miller6281dcc2011-03-12 00:43:55 -0500857__be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858{
Al Virof9d07e41f82006-09-27 18:45:50 -0700859 __be16 port;
David S. Miller1d28f422011-03-12 00:29:39 -0500860 switch(fl->flowi_proto) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 case IPPROTO_TCP:
862 case IPPROTO_UDP:
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800863 case IPPROTO_UDPLITE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 case IPPROTO_SCTP:
David S. Miller6281dcc2011-03-12 00:43:55 -0500865 port = uli->ports.sport;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 break;
867 case IPPROTO_ICMP:
868 case IPPROTO_ICMPV6:
David S. Miller6281dcc2011-03-12 00:43:55 -0500869 port = htons(uli->icmpt.type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 break;
Masahide NAKAMURA2ce42722006-08-23 20:39:03 -0700871 case IPPROTO_MH:
David S. Miller6281dcc2011-03-12 00:43:55 -0500872 port = htons(uli->mht.type);
Masahide NAKAMURA2ce42722006-08-23 20:39:03 -0700873 break;
Timo Teräscc9ff192010-11-03 04:41:38 +0000874 case IPPROTO_GRE:
David S. Miller6281dcc2011-03-12 00:43:55 -0500875 port = htons(ntohl(uli->gre_key) >> 16);
Timo Teräscc9ff192010-11-03 04:41:38 +0000876 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 default:
878 port = 0; /*XXX*/
879 }
880 return port;
881}
882
883static __inline__
David S. Miller6281dcc2011-03-12 00:43:55 -0500884__be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885{
Al Virof9d07e41f82006-09-27 18:45:50 -0700886 __be16 port;
David S. Miller1d28f422011-03-12 00:29:39 -0500887 switch(fl->flowi_proto) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 case IPPROTO_TCP:
889 case IPPROTO_UDP:
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800890 case IPPROTO_UDPLITE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 case IPPROTO_SCTP:
David S. Miller6281dcc2011-03-12 00:43:55 -0500892 port = uli->ports.dport;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 break;
894 case IPPROTO_ICMP:
895 case IPPROTO_ICMPV6:
David S. Miller6281dcc2011-03-12 00:43:55 -0500896 port = htons(uli->icmpt.code);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 break;
Timo Teräscc9ff192010-11-03 04:41:38 +0000898 case IPPROTO_GRE:
David S. Miller6281dcc2011-03-12 00:43:55 -0500899 port = htons(ntohl(uli->gre_key) & 0xffff);
Timo Teräscc9ff192010-11-03 04:41:38 +0000900 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 default:
902 port = 0; /*XXX*/
903 }
904 return port;
905}
906
David S. Millerbc9b35a2012-05-15 15:04:57 -0400907extern bool xfrm_selector_match(const struct xfrm_selector *sel,
908 const struct flowi *fl,
909 unsigned short family);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910
Trent Jaegerdf718372005-12-13 23:12:27 -0800911#ifdef CONFIG_SECURITY_NETWORK_XFRM
912/* If neither has a context --> match
913 * Otherwise, both must have a context and the sids, doi, alg must match
914 */
David S. Millerbc9b35a2012-05-15 15:04:57 -0400915static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
Trent Jaegerdf718372005-12-13 23:12:27 -0800916{
917 return ((!s1 && !s2) ||
918 (s1 && s2 &&
919 (s1->ctx_sid == s2->ctx_sid) &&
920 (s1->ctx_doi == s2->ctx_doi) &&
921 (s1->ctx_alg == s2->ctx_alg)));
922}
923#else
David S. Millerbc9b35a2012-05-15 15:04:57 -0400924static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
Trent Jaegerdf718372005-12-13 23:12:27 -0800925{
David S. Millerbc9b35a2012-05-15 15:04:57 -0400926 return true;
Trent Jaegerdf718372005-12-13 23:12:27 -0800927}
928#endif
929
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930/* A struct encoding bundle of transformations to apply to some set of flow.
931 *
932 * dst->child points to the next element of bundle.
933 * dst->xfrm points to an instanse of transformer.
934 *
935 * Due to unfortunate limitations of current routing cache, which we
936 * have no time to fix, it mirrors struct rtable and bound to the same
937 * routing key, including saddr,daddr. However, we can have many of
938 * bundles differing by session id. All the bundles grow from a parent
939 * policy rule.
940 */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000941struct xfrm_dst {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 union {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 struct dst_entry dst;
944 struct rtable rt;
945 struct rt6_info rt6;
946 } u;
947 struct dst_entry *route;
Timo Teräs80c802f2010-04-07 00:30:05 +0000948 struct flow_cache_object flo;
949 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
950 int num_pols, num_xfrms;
Masahide NAKAMURA157bfc22007-04-30 00:33:35 -0700951#ifdef CONFIG_XFRM_SUB_POLICY
952 struct flowi *origin;
953 struct xfrm_selector *partner;
954#endif
Timo Teräs80c802f2010-04-07 00:30:05 +0000955 u32 xfrm_genid;
956 u32 policy_genid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 u32 route_mtu_cached;
958 u32 child_mtu_cached;
Hideaki YOSHIFUJI92d63de2005-05-26 12:58:04 -0700959 u32 route_cookie;
960 u32 path_cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961};
962
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -0700963#ifdef CONFIG_XFRM
Herbert Xuaabc9762005-05-03 16:27:10 -0700964static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
965{
Timo Teräs80c802f2010-04-07 00:30:05 +0000966 xfrm_pols_put(xdst->pols, xdst->num_pols);
Herbert Xuaabc9762005-05-03 16:27:10 -0700967 dst_release(xdst->route);
968 if (likely(xdst->u.dst.xfrm))
969 xfrm_state_put(xdst->u.dst.xfrm);
Masahide NAKAMURA157bfc22007-04-30 00:33:35 -0700970#ifdef CONFIG_XFRM_SUB_POLICY
971 kfree(xdst->origin);
972 xdst->origin = NULL;
973 kfree(xdst->partner);
974 xdst->partner = NULL;
975#endif
Herbert Xuaabc9762005-05-03 16:27:10 -0700976}
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -0700977#endif
Herbert Xuaabc9762005-05-03 16:27:10 -0700978
979extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
980
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000981struct sec_path {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982 atomic_t refcnt;
983 int len;
Herbert Xudbe5b4a2006-04-01 00:54:16 -0800984 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985};
986
Michael Smith990078a2011-04-07 04:51:51 +0000987static inline int secpath_exists(struct sk_buff *skb)
988{
989#ifdef CONFIG_XFRM
990 return skb->sp != NULL;
991#else
992 return 0;
993#endif
994}
995
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996static inline struct sec_path *
997secpath_get(struct sec_path *sp)
998{
999 if (sp)
1000 atomic_inc(&sp->refcnt);
1001 return sp;
1002}
1003
1004extern void __secpath_destroy(struct sec_path *sp);
1005
1006static inline void
1007secpath_put(struct sec_path *sp)
1008{
1009 if (sp && atomic_dec_and_test(&sp->refcnt))
1010 __secpath_destroy(sp);
1011}
1012
1013extern struct sec_path *secpath_dup(struct sec_path *src);
1014
1015static inline void
1016secpath_reset(struct sk_buff *skb)
1017{
1018#ifdef CONFIG_XFRM
1019 secpath_put(skb->sp);
1020 skb->sp = NULL;
1021#endif
1022}
1023
1024static inline int
David S. Miller6cc32962011-02-24 00:19:59 -05001025xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
Patrick McHardya1e59ab2006-09-19 12:57:34 -07001026{
1027 switch (family) {
1028 case AF_INET:
1029 return addr->a4 == 0;
1030 case AF_INET6:
1031 return ipv6_addr_any((struct in6_addr *)&addr->a6);
1032 }
1033 return 0;
1034}
1035
1036static inline int
David S. Miller21eddb52011-02-24 01:35:16 -05001037__xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038{
1039 return (tmpl->saddr.a4 &&
1040 tmpl->saddr.a4 != x->props.saddr.a4);
1041}
1042
1043static inline int
David S. Miller21eddb52011-02-24 01:35:16 -05001044__xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045{
1046 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
YOSHIFUJI Hideaki / 吉藤英明ff88b302013-01-29 12:48:31 +00001047 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048}
1049
1050static inline int
David S. Miller21eddb52011-02-24 01:35:16 -05001051xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052{
1053 switch (family) {
1054 case AF_INET:
1055 return __xfrm4_state_addr_cmp(tmpl, x);
1056 case AF_INET6:
1057 return __xfrm6_state_addr_cmp(tmpl, x);
1058 }
1059 return !0;
1060}
1061
1062#ifdef CONFIG_XFRM
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family);
1064
Herbert Xud5422ef2007-12-12 10:44:16 -08001065static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1066 struct sk_buff *skb,
1067 unsigned int family, int reverse)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068{
Alexey Dobriyanf6e1e252008-11-25 17:35:44 -08001069 struct net *net = dev_net(skb->dev);
Herbert Xud5422ef2007-12-12 10:44:16 -08001070 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1071
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 if (sk && sk->sk_policy[XFRM_POLICY_IN])
Herbert Xud5422ef2007-12-12 10:44:16 -08001073 return __xfrm_policy_check(sk, ndir, skb, family);
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -07001074
Alexey Dobriyanf6e1e252008-11-25 17:35:44 -08001075 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
Eric Dumazetadf30902009-06-02 05:19:30 +00001076 (skb_dst(skb)->flags & DST_NOPOLICY) ||
Herbert Xud5422ef2007-12-12 10:44:16 -08001077 __xfrm_policy_check(sk, ndir, skb, family);
1078}
1079
1080static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1081{
1082 return __xfrm_policy_check2(sk, dir, skb, family, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083}
1084
1085static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1086{
1087 return xfrm_policy_check(sk, dir, skb, AF_INET);
1088}
1089
1090static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1091{
1092 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1093}
1094
Herbert Xud5422ef2007-12-12 10:44:16 -08001095static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1096 struct sk_buff *skb)
1097{
1098 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1099}
1100
1101static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1102 struct sk_buff *skb)
1103{
1104 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1105}
1106
1107extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1108 unsigned int family, int reverse);
1109
1110static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1111 unsigned int family)
1112{
1113 return __xfrm_decode_session(skb, fl, family, 0);
1114}
1115
1116static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1117 struct flowi *fl,
1118 unsigned int family)
1119{
1120 return __xfrm_decode_session(skb, fl, family, 1);
1121}
1122
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1124
1125static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1126{
Alexey Dobriyan99a66652008-11-25 17:36:13 -08001127 struct net *net = dev_net(skb->dev);
1128
1129 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
Eric Dumazetadf30902009-06-02 05:19:30 +00001130 (skb_dst(skb)->flags & DST_NOXFRM) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 __xfrm_route_forward(skb, family);
1132}
1133
1134static inline int xfrm4_route_forward(struct sk_buff *skb)
1135{
1136 return xfrm_route_forward(skb, AF_INET);
1137}
1138
1139static inline int xfrm6_route_forward(struct sk_buff *skb)
1140{
1141 return xfrm_route_forward(skb, AF_INET6);
1142}
1143
1144extern int __xfrm_sk_clone_policy(struct sock *sk);
1145
1146static inline int xfrm_sk_clone_policy(struct sock *sk)
1147{
1148 if (unlikely(sk->sk_policy[0] || sk->sk_policy[1]))
1149 return __xfrm_sk_clone_policy(sk);
1150 return 0;
1151}
1152
Herbert Xu4666faa2005-06-18 22:43:22 -07001153extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154
1155static inline void xfrm_sk_free_policy(struct sock *sk)
1156{
1157 if (unlikely(sk->sk_policy[0] != NULL)) {
1158 xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX);
1159 sk->sk_policy[0] = NULL;
1160 }
1161 if (unlikely(sk->sk_policy[1] != NULL)) {
1162 xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1);
1163 sk->sk_policy[1] = NULL;
1164 }
1165}
1166
Paul Mooree4c17212013-05-29 07:36:25 +00001167extern void xfrm_garbage_collect(struct net *net);
1168
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169#else
1170
1171static inline void xfrm_sk_free_policy(struct sock *sk) {}
1172static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; }
1173static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1174static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1175static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1176{
1177 return 1;
1178}
1179static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1180{
1181 return 1;
1182}
1183static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1184{
1185 return 1;
1186}
Herbert Xud5422ef2007-12-12 10:44:16 -08001187static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1188 struct flowi *fl,
1189 unsigned int family)
1190{
1191 return -ENOSYS;
1192}
1193static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1194 struct sk_buff *skb)
1195{
1196 return 1;
1197}
1198static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1199 struct sk_buff *skb)
1200{
1201 return 1;
1202}
Paul Mooree4c17212013-05-29 07:36:25 +00001203static inline void xfrm_garbage_collect(struct net *net)
1204{
1205}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206#endif
1207
1208static __inline__
David S. Millere8a4e372011-02-22 17:42:56 -08001209xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210{
1211 switch (family){
1212 case AF_INET:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001213 return (xfrm_address_t *)&fl->u.ip4.daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 case AF_INET6:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001215 return (xfrm_address_t *)&fl->u.ip6.daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 }
1217 return NULL;
1218}
1219
1220static __inline__
David S. Millere8a4e372011-02-22 17:42:56 -08001221xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222{
1223 switch (family){
1224 case AF_INET:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001225 return (xfrm_address_t *)&fl->u.ip4.saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226 case AF_INET6:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001227 return (xfrm_address_t *)&fl->u.ip6.saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228 }
1229 return NULL;
1230}
1231
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001232static __inline__
David S. Millere8a4e372011-02-22 17:42:56 -08001233void xfrm_flowi_addr_get(const struct flowi *fl,
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001234 xfrm_address_t *saddr, xfrm_address_t *daddr,
1235 unsigned short family)
1236{
1237 switch(family) {
1238 case AF_INET:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001239 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1240 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001241 break;
1242 case AF_INET6:
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001243 *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr;
1244 *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr;
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001245 break;
1246 }
1247}
1248
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001250__xfrm4_state_addr_check(const struct xfrm_state *x,
1251 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252{
1253 if (daddr->a4 == x->id.daddr.a4 &&
1254 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1255 return 1;
1256 return 0;
1257}
1258
1259static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001260__xfrm6_state_addr_check(const struct xfrm_state *x,
1261 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262{
YOSHIFUJI Hideaki / 吉藤英明ff88b302013-01-29 12:48:31 +00001263 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1264 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265 ipv6_addr_any((struct in6_addr *)saddr) ||
1266 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1267 return 1;
1268 return 0;
1269}
1270
1271static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001272xfrm_state_addr_check(const struct xfrm_state *x,
1273 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 unsigned short family)
1275{
1276 switch (family) {
1277 case AF_INET:
1278 return __xfrm4_state_addr_check(x, daddr, saddr);
1279 case AF_INET6:
1280 return __xfrm6_state_addr_check(x, daddr, saddr);
1281 }
1282 return 0;
1283}
1284
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001285static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001286xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001287 unsigned short family)
1288{
1289 switch (family) {
1290 case AF_INET:
1291 return __xfrm4_state_addr_check(x,
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001292 (const xfrm_address_t *)&fl->u.ip4.daddr,
1293 (const xfrm_address_t *)&fl->u.ip4.saddr);
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001294 case AF_INET6:
1295 return __xfrm6_state_addr_check(x,
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001296 (const xfrm_address_t *)&fl->u.ip6.daddr,
1297 (const xfrm_address_t *)&fl->u.ip6.saddr);
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001298 }
1299 return 0;
1300}
1301
David S. Millerf8848062011-02-24 01:42:28 -05001302static inline int xfrm_state_kern(const struct xfrm_state *x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303{
1304 return atomic_read(&x->tunnel_users);
1305}
1306
Masahide NAKAMURA57947082006-09-22 15:06:24 -07001307static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1308{
Masahide NAKAMURAdc00a522006-08-23 17:49:52 -07001309 return (!userproto || proto == userproto ||
1310 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1311 proto == IPPROTO_ESP ||
1312 proto == IPPROTO_COMP)));
Masahide NAKAMURA57947082006-09-22 15:06:24 -07001313}
1314
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315/*
1316 * xfrm algorithm information
1317 */
Herbert Xu1a6509d2008-01-28 19:37:29 -08001318struct xfrm_algo_aead_info {
1319 u16 icv_truncbits;
1320};
1321
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322struct xfrm_algo_auth_info {
1323 u16 icv_truncbits;
1324 u16 icv_fullbits;
1325};
1326
1327struct xfrm_algo_encr_info {
1328 u16 blockbits;
1329 u16 defkeybits;
1330};
1331
1332struct xfrm_algo_comp_info {
1333 u16 threshold;
1334};
1335
1336struct xfrm_algo_desc {
1337 char *name;
Herbert Xu04ff1262006-08-13 08:50:00 +10001338 char *compat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339 u8 available:1;
Jussi Kivilinna7e50f842013-01-31 12:40:38 +02001340 u8 pfkey_supported:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341 union {
Herbert Xu1a6509d2008-01-28 19:37:29 -08001342 struct xfrm_algo_aead_info aead;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343 struct xfrm_algo_auth_info auth;
1344 struct xfrm_algo_encr_info encr;
1345 struct xfrm_algo_comp_info comp;
1346 } uinfo;
1347 struct sadb_alg desc;
1348};
1349
1350/* XFRM tunnel handlers. */
1351struct xfrm_tunnel {
1352 int (*handler)(struct sk_buff *skb);
jamala6337462010-02-09 13:21:17 +00001353 int (*err_handler)(struct sk_buff *skb, u32 info);
Herbert Xud2acc342006-03-28 01:12:13 -08001354
Eric Dumazetb33eab02010-10-25 21:01:26 +00001355 struct xfrm_tunnel __rcu *next;
Herbert Xud2acc342006-03-28 01:12:13 -08001356 int priority;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001357};
1358
1359struct xfrm6_tunnel {
Herbert Xud2acc342006-03-28 01:12:13 -08001360 int (*handler)(struct sk_buff *skb);
1361 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
Brian Haleyd5fdd6b2009-06-23 04:31:07 -07001362 u8 type, u8 code, int offset, __be32 info);
Eric Dumazet6f0bcf12010-10-24 21:33:16 +00001363 struct xfrm6_tunnel __rcu *next;
Herbert Xud2acc342006-03-28 01:12:13 -08001364 int priority;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365};
1366
1367extern void xfrm_init(void);
Steffen Klassert703fb942012-11-13 08:52:24 +01001368extern void xfrm4_init(void);
Alexey Dobriyand62ddc22008-11-25 17:14:31 -08001369extern int xfrm_state_init(struct net *net);
1370extern void xfrm_state_fini(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371extern void xfrm4_state_init(void);
Daniel Lezcanoc35b7e72007-12-08 00:14:11 -08001372#ifdef CONFIG_XFRM
1373extern int xfrm6_init(void);
1374extern void xfrm6_fini(void);
Daniel Lezcano0013cab2007-12-07 00:42:11 -08001375extern int xfrm6_state_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376extern void xfrm6_state_fini(void);
Daniel Lezcanoc35b7e72007-12-08 00:14:11 -08001377#else
1378static inline int xfrm6_init(void)
1379{
1380 return 0;
1381}
1382static inline void xfrm6_fini(void)
1383{
1384 ;
1385}
1386#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -08001388#ifdef CONFIG_XFRM_STATISTICS
Alexey Dobriyanc68cd1a2008-11-25 18:00:14 -08001389extern int xfrm_proc_init(struct net *net);
1390extern void xfrm_proc_fini(struct net *net);
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -08001391#endif
1392
Alexey Dobriyanb27aead2008-11-25 18:00:48 -08001393extern int xfrm_sysctl_init(struct net *net);
1394#ifdef CONFIG_SYSCTL
1395extern void xfrm_sysctl_fini(struct net *net);
1396#else
1397static inline void xfrm_sysctl_fini(struct net *net)
1398{
1399}
1400#endif
1401
Herbert Xu5c182452008-09-22 19:48:19 -07001402extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto);
Alexey Dobriyan284fa7d2008-11-25 17:32:14 -08001403extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
Timo Teras4c563f72008-02-28 21:31:08 -08001404 int (*func)(struct xfrm_state *, int, void*), void *);
Herbert Xuabb81c42008-09-09 19:58:29 -07001405extern void xfrm_state_walk_done(struct xfrm_state_walk *walk);
Alexey Dobriyan673c09b2008-11-25 17:15:16 -08001406extern struct xfrm_state *xfrm_state_alloc(struct net *net);
David S. Miller33765d02011-02-24 01:55:45 -05001407extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1408 const xfrm_address_t *saddr,
David S. Millerb520e9f2011-02-22 18:24:19 -08001409 const struct flowi *fl,
1410 struct xfrm_tmpl *tmpl,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411 struct xfrm_policy *pol, int *err,
1412 unsigned short family);
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001413extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -08001414 xfrm_address_t *daddr,
Jamal Hadi Salim628529b2007-07-02 22:41:14 -07001415 xfrm_address_t *saddr,
1416 unsigned short family,
1417 u8 mode, u8 proto, u32 reqid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418extern int xfrm_state_check_expire(struct xfrm_state *x);
1419extern void xfrm_state_insert(struct xfrm_state *x);
1420extern int xfrm_state_add(struct xfrm_state *x);
1421extern int xfrm_state_update(struct xfrm_state *x);
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001422extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
David S. Millera70486f2011-02-27 23:17:24 -08001423 const xfrm_address_t *daddr, __be32 spi,
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001424 u8 proto, unsigned short family);
1425extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
David S. Millera70486f2011-02-27 23:17:24 -08001426 const xfrm_address_t *daddr,
1427 const xfrm_address_t *saddr,
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001428 u8 proto,
1429 unsigned short family);
Masahide NAKAMURA41a49cc2006-08-23 22:48:31 -07001430#ifdef CONFIG_XFRM_SUB_POLICY
1431extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1432 int n, unsigned short family);
1433extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1434 int n, unsigned short family);
1435#else
1436static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1437 int n, unsigned short family)
1438{
1439 return -ENOSYS;
1440}
1441
1442static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1443 int n, unsigned short family)
1444{
1445 return -ENOSYS;
1446}
1447#endif
Jamal Hadi Salimaf11e312007-05-04 12:55:13 -07001448
1449struct xfrmk_sadinfo {
1450 u32 sadhcnt; /* current hash bkts */
1451 u32 sadhmcnt; /* max allowed hash bkts */
1452 u32 sadcnt; /* current running count */
1453};
1454
Jamal Hadi Salim5a6d3412007-05-04 12:55:39 -07001455struct xfrmk_spdinfo {
1456 u32 incnt;
1457 u32 outcnt;
1458 u32 fwdcnt;
1459 u32 inscnt;
1460 u32 outscnt;
1461 u32 fwdscnt;
1462 u32 spdhcnt;
1463 u32 spdhmcnt;
1464};
1465
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001466extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark,
1467 u32 seq);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001468extern int xfrm_state_delete(struct xfrm_state *x);
Alexey Dobriyan0e602452008-11-25 17:30:18 -08001469extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info);
Alexey Dobriyane0710412010-01-23 13:37:10 +00001470extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1471extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
Steffen Klassert2cd08462011-03-08 00:09:51 +00001472extern u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
Steffen Klassert9fdc4882011-03-08 00:08:32 +00001473extern int xfrm_init_replay(struct xfrm_state *x);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474extern int xfrm_state_mtu(struct xfrm_state *x, int mtu);
Wei Yongjuna454f0c2011-03-21 18:08:28 -07001475extern int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
Herbert Xu72cb6962005-06-20 13:18:08 -07001476extern int xfrm_init_state(struct xfrm_state *x);
Herbert Xu227620e2007-11-13 21:41:28 -08001477extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
Herbert Xu716062f2007-11-13 21:44:23 -08001478extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi,
1479 int encap_type);
Herbert Xu1bf06cd2007-11-19 18:50:17 -08001480extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
Herbert Xuc6581a42007-11-13 21:43:43 -08001481extern int xfrm_output_resume(struct sk_buff *skb, int err);
Herbert Xu406ef772007-10-08 17:16:30 -07001482extern int xfrm_output(struct sk_buff *skb);
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -07001483extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
Hannes Frederic Sowa628e3412013-08-14 13:05:23 +02001484extern void xfrm_local_error(struct sk_buff *skb, int mtu);
Herbert Xu36cf9ac2007-11-13 21:40:52 -08001485extern int xfrm4_extract_header(struct sk_buff *skb);
Herbert Xu227620e2007-11-13 21:41:28 -08001486extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
Herbert Xuc4541b42007-10-17 21:28:53 -07001487extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1488 int encap_type);
Herbert Xu716062f2007-11-13 21:44:23 -08001489extern int xfrm4_transport_finish(struct sk_buff *skb, int async);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490extern int xfrm4_rcv(struct sk_buff *skb);
Herbert Xuc4541b42007-10-17 21:28:53 -07001491
1492static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1493{
1494 return xfrm4_rcv_encap(skb, nexthdr, spi, 0);
1495}
1496
Herbert Xu36cf9ac2007-11-13 21:40:52 -08001497extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1498extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001499extern int xfrm4_output(struct sk_buff *skb);
Steffen Klassert43a4dea2011-05-09 19:36:38 +00001500extern int xfrm4_output_finish(struct sk_buff *skb);
Kazunori MIYAZAWAc0d56402007-02-13 12:54:47 -08001501extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1502extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
Saurabheb8637c2012-07-17 09:44:49 +00001503extern int xfrm4_mode_tunnel_input_register(struct xfrm_tunnel *handler);
1504extern int xfrm4_mode_tunnel_input_deregister(struct xfrm_tunnel *handler);
Hannes Frederic Sowa628e3412013-08-14 13:05:23 +02001505extern void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
Herbert Xu36cf9ac2007-11-13 21:40:52 -08001506extern int xfrm6_extract_header(struct sk_buff *skb);
Herbert Xu227620e2007-11-13 21:41:28 -08001507extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
Herbert Xu33b5ecb2007-10-17 21:29:25 -07001508extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi);
Herbert Xu716062f2007-11-13 21:44:23 -08001509extern int xfrm6_transport_finish(struct sk_buff *skb, int async);
Herbert Xue5bbef22007-10-15 12:50:28 -07001510extern int xfrm6_rcv(struct sk_buff *skb);
Masahide NAKAMURAfbd9a5b2006-08-23 18:08:21 -07001511extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1512 xfrm_address_t *saddr, u8 proto);
Kazunori MIYAZAWA73d605d2007-02-13 12:55:55 -08001513extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1514extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
Alexey Dobriyana1664772010-01-25 10:37:54 +00001515extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001516extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
Herbert Xu36cf9ac2007-11-13 21:40:52 -08001517extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1518extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001519extern int xfrm6_output(struct sk_buff *skb);
Steffen Klassert43a4dea2011-05-09 19:36:38 +00001520extern int xfrm6_output_finish(struct sk_buff *skb);
Masahide NAKAMURAaee5adb2006-08-23 17:57:28 -07001521extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1522 u8 **prevhdr);
Hannes Frederic Sowa628e3412013-08-14 13:05:23 +02001523extern void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524
1525#ifdef CONFIG_XFRM
James Chapman067b2072007-07-05 17:08:05 -07001526extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528#else
1529static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1530{
1531 return -ENOPROTOOPT;
1532}
1533
James Chapman067b2072007-07-05 17:08:05 -07001534static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535{
1536 /* should not happen */
1537 kfree_skb(skb);
1538 return 0;
1539}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540#endif
1541
Alexey Dobriyan0331b1f2008-11-25 17:21:45 -08001542struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
Timo Teras4c563f72008-02-28 21:31:08 -08001543
Herbert Xu12a169e2008-10-01 07:03:24 -07001544extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
Alexey Dobriyancdcbca72008-11-25 17:34:49 -08001545extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
Timo Teras4c563f72008-02-28 21:31:08 -08001546 int (*func)(struct xfrm_policy *, int, int, void*), void *);
Herbert Xu12a169e2008-10-01 07:03:24 -07001547extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
Jamal Hadi Salim8ca2e932010-02-22 11:32:57 +00001549struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1550 u8 type, int dir,
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -07001551 struct xfrm_selector *sel,
Eric Parisef41aaa2007-03-07 15:37:58 -08001552 struct xfrm_sec_ctx *ctx, int delete,
1553 int *err);
Jamal Hadi Salim8ca2e932010-02-22 11:32:57 +00001554struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err);
Alexey Dobriyan33ffbbd2008-11-25 17:33:32 -08001555int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556u32 xfrm_get_acqseq(void);
Herbert Xu658b2192007-10-09 13:29:52 -07001557extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001558struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark,
1559 u8 mode, u32 reqid, u8 proto,
David S. Millera70486f2011-02-27 23:17:24 -08001560 const xfrm_address_t *daddr,
1561 const xfrm_address_t *saddr, int create,
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001562 unsigned short family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001565#ifdef CONFIG_XFRM_MIGRATE
David S. Miller183cad12011-02-24 00:28:01 -05001566extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1567 const struct xfrm_migrate *m, int num_bundles,
1568 const struct xfrm_kmaddress *k);
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001569extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m);
1570extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
1571 struct xfrm_migrate *m);
David S. Millerb4b7c0b2011-02-24 00:35:06 -05001572extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07001573 struct xfrm_migrate *m, int num_bundles,
1574 struct xfrm_kmaddress *k);
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001575#endif
1576
Al Viro5d36b182006-11-08 00:24:06 -08001577extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
Eric W. Biederman15e47302012-09-07 20:12:54 +00001578extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
Alexey Dobriyandb983c12008-11-25 17:51:01 -08001579extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580
1581extern void xfrm_input_init(void);
Al Viro6067b2b2006-09-27 18:47:59 -07001582extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583
1584extern void xfrm_probe_algs(void);
Jussi Kivilinna7e50f842013-01-31 12:40:38 +02001585extern int xfrm_count_pfkey_auth_supported(void);
1586extern int xfrm_count_pfkey_enc_supported(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1588extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1589extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1590extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1591extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
David S. Miller6f2f19e2011-02-27 23:04:45 -08001592extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1593extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1594extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1595extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
Herbert Xu1a6509d2008-01-28 19:37:29 -08001596 int probe);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597
YOSHIFUJI Hideaki / 吉藤英明ff88b302013-01-29 12:48:31 +00001598static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1599 const xfrm_address_t *b)
1600{
1601 return ipv6_addr_equal((const struct in6_addr *)a,
1602 (const struct in6_addr *)b);
1603}
1604
YOSHIFUJI Hideaki / 吉藤英明70e94e62013-01-29 12:48:50 +00001605static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1606 const xfrm_address_t *b,
1607 sa_family_t family)
1608{
1609 switch (family) {
1610 default:
1611 case AF_INET:
1612 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1613 case AF_INET6:
1614 return xfrm6_addr_equal(a, b);
1615 }
1616}
1617
Herbert Xu77d8d7a2005-10-05 12:15:12 -07001618static inline int xfrm_policy_id2dir(u32 index)
1619{
1620 return index & 7;
1621}
1622
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001623#ifdef CONFIG_XFRM
1624static inline int xfrm_aevent_is_on(struct net *net)
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001625{
Patrick McHardybe336902006-03-20 22:40:54 -08001626 struct sock *nlsk;
1627 int ret = 0;
1628
1629 rcu_read_lock();
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001630 nlsk = rcu_dereference(net->xfrm.nlsk);
Patrick McHardybe336902006-03-20 22:40:54 -08001631 if (nlsk)
1632 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1633 rcu_read_unlock();
1634 return ret;
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001635}
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001636#endif
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001637
David S. Miller85158622011-02-27 23:07:02 -08001638static inline int xfrm_alg_len(const struct xfrm_algo *alg)
Eric Dumazet0f99be02008-01-08 23:39:06 -08001639{
1640 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1641}
1642
David S. Miller85158622011-02-27 23:07:02 -08001643static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
Martin Willi4447bb32009-11-25 00:29:52 +00001644{
1645 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1646}
1647
Steffen Klassert9736acf2011-03-08 00:05:43 +00001648static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1649{
1650 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1651}
1652
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001653#ifdef CONFIG_XFRM_MIGRATE
Steffen Klassertaf2f4642011-03-28 19:46:39 +00001654static inline int xfrm_replay_clone(struct xfrm_state *x,
1655 struct xfrm_state *orig)
1656{
1657 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1658 GFP_KERNEL);
1659 if (!x->replay_esn)
1660 return -ENOMEM;
1661
1662 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1663 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1664
1665 x->preplay_esn = kmemdup(x->replay_esn,
1666 xfrm_replay_state_esn_len(x->replay_esn),
1667 GFP_KERNEL);
1668 if (!x->preplay_esn) {
1669 kfree(x->replay_esn);
1670 return -ENOMEM;
1671 }
1672
1673 return 0;
1674}
1675
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001676static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1677{
Eric Dumazet0f99be02008-01-08 23:39:06 -08001678 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001679}
1680
Martin Willi4447bb32009-11-25 00:29:52 +00001681static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1682{
1683 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1684}
1685
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001686static inline void xfrm_states_put(struct xfrm_state **states, int n)
1687{
1688 int i;
1689 for (i = 0; i < n; i++)
1690 xfrm_state_put(*(states + i));
1691}
1692
1693static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1694{
1695 int i;
1696 for (i = 0; i < n; i++)
1697 xfrm_state_delete(*(states + i));
1698}
1699#endif
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001700
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -07001701#ifdef CONFIG_XFRM
Herbert Xu00501122007-12-11 01:53:43 -08001702static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1703{
1704 return skb->sp->xvec[skb->sp->len - 1];
1705}
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -07001706#endif
Herbert Xu00501122007-12-11 01:53:43 -08001707
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +00001708static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1709{
1710 if (attrs[XFRMA_MARK])
Andreas Steffen4efd7e82010-06-30 10:41:15 -07001711 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +00001712 else
1713 m->v = m->m = 0;
1714
1715 return m->v & m->m;
1716}
1717
David S. Millere3dfa382011-02-27 23:20:19 -08001718static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +00001719{
David S. Miller1d1e34d2012-06-27 21:57:03 -07001720 int ret = 0;
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +00001721
David S. Miller1d1e34d2012-06-27 21:57:03 -07001722 if (m->m | m->v)
1723 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1724 return ret;
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +00001725}
1726
Hannes Frederic Sowa0ea9d5e2013-08-13 04:35:58 +02001727static inline int xfrm_skb_dst_mtu(struct sk_buff *skb)
1728{
1729 struct sock *sk = skb->sk;
1730
Hannes Frederic Sowa844d4872013-08-18 13:47:01 +02001731 if (sk && skb->protocol == htons(ETH_P_IPV6))
Hannes Frederic Sowa0ea9d5e2013-08-13 04:35:58 +02001732 return ip6_skb_dst_mtu(skb);
Hannes Frederic Sowa844d4872013-08-18 13:47:01 +02001733 else if (sk && skb->protocol == htons(ETH_P_IP))
Hannes Frederic Sowa0ea9d5e2013-08-13 04:35:58 +02001734 return ip_skb_dst_mtu(skb);
1735 return dst_mtu(skb_dst(skb));
1736}
1737
Linus Torvalds1da177e2005-04-16 15:20:36 -07001738#endif /* _NET_XFRM_H */