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net: remove ipv6_addr_copy()
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / net / xfrm.h
1 #ifndef _NET_XFRM_H
2 #define _NET_XFRM_H
3
4 #include <linux/compiler.h>
5 #include <linux/xfrm.h>
6 #include <linux/spinlock.h>
7 #include <linux/list.h>
8 #include <linux/skbuff.h>
9 #include <linux/socket.h>
10 #include <linux/pfkeyv2.h>
11 #include <linux/ipsec.h>
12 #include <linux/in6.h>
13 #include <linux/mutex.h>
14 #include <linux/audit.h>
15 #include <linux/slab.h>
16
17 #include <net/sock.h>
18 #include <net/dst.h>
19 #include <net/ip.h>
20 #include <net/route.h>
21 #include <net/ipv6.h>
22 #include <net/ip6_fib.h>
23 #include <net/flow.h>
24
25 #include <linux/interrupt.h>
26
27 #ifdef CONFIG_XFRM_STATISTICS
28 #include <net/snmp.h>
29 #endif
30
31 #define XFRM_PROTO_ESP 50
32 #define XFRM_PROTO_AH 51
33 #define XFRM_PROTO_COMP 108
34 #define XFRM_PROTO_IPIP 4
35 #define XFRM_PROTO_IPV6 41
36 #define XFRM_PROTO_ROUTING IPPROTO_ROUTING
37 #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
38
39 #define XFRM_ALIGN4(len) (((len) + 3) & ~3)
40 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
41 #define MODULE_ALIAS_XFRM_MODE(family, encap) \
42 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
43 #define MODULE_ALIAS_XFRM_TYPE(family, proto) \
44 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
45
46 #ifdef CONFIG_XFRM_STATISTICS
47 #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
48 #define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field)
49 #define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field)
50 #else
51 #define XFRM_INC_STATS(net, field) ((void)(net))
52 #define XFRM_INC_STATS_BH(net, field) ((void)(net))
53 #define XFRM_INC_STATS_USER(net, field) ((void)(net))
54 #endif
55
56 extern struct mutex xfrm_cfg_mutex;
57
58 /* Organization of SPD aka "XFRM rules"
59 ------------------------------------
60
61 Basic objects:
62 - policy rule, struct xfrm_policy (=SPD entry)
63 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
64 - instance of a transformer, struct xfrm_state (=SA)
65 - template to clone xfrm_state, struct xfrm_tmpl
66
67 SPD is plain linear list of xfrm_policy rules, ordered by priority.
68 (To be compatible with existing pfkeyv2 implementations,
69 many rules with priority of 0x7fffffff are allowed to exist and
70 such rules are ordered in an unpredictable way, thanks to bsd folks.)
71
72 Lookup is plain linear search until the first match with selector.
73
74 If "action" is "block", then we prohibit the flow, otherwise:
75 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
76 policy entry has list of up to XFRM_MAX_DEPTH transformations,
77 described by templates xfrm_tmpl. Each template is resolved
78 to a complete xfrm_state (see below) and we pack bundle of transformations
79 to a dst_entry returned to requestor.
80
81 dst -. xfrm .-> xfrm_state #1
82 |---. child .-> dst -. xfrm .-> xfrm_state #2
83 |---. child .-> dst -. xfrm .-> xfrm_state #3
84 |---. child .-> NULL
85
86 Bundles are cached at xrfm_policy struct (field ->bundles).
87
88
89 Resolution of xrfm_tmpl
90 -----------------------
91 Template contains:
92 1. ->mode Mode: transport or tunnel
93 2. ->id.proto Protocol: AH/ESP/IPCOMP
94 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
95 Q: allow to resolve security gateway?
96 4. ->id.spi If not zero, static SPI.
97 5. ->saddr Local tunnel endpoint, ignored for transport mode.
98 6. ->algos List of allowed algos. Plain bitmask now.
99 Q: ealgos, aalgos, calgos. What a mess...
100 7. ->share Sharing mode.
101 Q: how to implement private sharing mode? To add struct sock* to
102 flow id?
103
104 Having this template we search through SAD searching for entries
105 with appropriate mode/proto/algo, permitted by selector.
106 If no appropriate entry found, it is requested from key manager.
107
108 PROBLEMS:
109 Q: How to find all the bundles referring to a physical path for
110 PMTU discovery? Seems, dst should contain list of all parents...
111 and enter to infinite locking hierarchy disaster.
112 No! It is easier, we will not search for them, let them find us.
113 We add genid to each dst plus pointer to genid of raw IP route,
114 pmtu disc will update pmtu on raw IP route and increase its genid.
115 dst_check() will see this for top level and trigger resyncing
116 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
117 */
118
119 struct xfrm_state_walk {
120 struct list_head all;
121 u8 state;
122 union {
123 u8 dying;
124 u8 proto;
125 };
126 u32 seq;
127 };
128
129 /* Full description of state of transformer. */
130 struct xfrm_state {
131 #ifdef CONFIG_NET_NS
132 struct net *xs_net;
133 #endif
134 union {
135 struct hlist_node gclist;
136 struct hlist_node bydst;
137 };
138 struct hlist_node bysrc;
139 struct hlist_node byspi;
140
141 atomic_t refcnt;
142 spinlock_t lock;
143
144 struct xfrm_id id;
145 struct xfrm_selector sel;
146 struct xfrm_mark mark;
147 u32 tfcpad;
148
149 u32 genid;
150
151 /* Key manager bits */
152 struct xfrm_state_walk km;
153
154 /* Parameters of this state. */
155 struct {
156 u32 reqid;
157 u8 mode;
158 u8 replay_window;
159 u8 aalgo, ealgo, calgo;
160 u8 flags;
161 u16 family;
162 xfrm_address_t saddr;
163 int header_len;
164 int trailer_len;
165 } props;
166
167 struct xfrm_lifetime_cfg lft;
168
169 /* Data for transformer */
170 struct xfrm_algo_auth *aalg;
171 struct xfrm_algo *ealg;
172 struct xfrm_algo *calg;
173 struct xfrm_algo_aead *aead;
174
175 /* Data for encapsulator */
176 struct xfrm_encap_tmpl *encap;
177
178 /* Data for care-of address */
179 xfrm_address_t *coaddr;
180
181 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
182 struct xfrm_state *tunnel;
183
184 /* If a tunnel, number of users + 1 */
185 atomic_t tunnel_users;
186
187 /* State for replay detection */
188 struct xfrm_replay_state replay;
189 struct xfrm_replay_state_esn *replay_esn;
190
191 /* Replay detection state at the time we sent the last notification */
192 struct xfrm_replay_state preplay;
193 struct xfrm_replay_state_esn *preplay_esn;
194
195 /* The functions for replay detection. */
196 struct xfrm_replay *repl;
197
198 /* internal flag that only holds state for delayed aevent at the
199 * moment
200 */
201 u32 xflags;
202
203 /* Replay detection notification settings */
204 u32 replay_maxage;
205 u32 replay_maxdiff;
206
207 /* Replay detection notification timer */
208 struct timer_list rtimer;
209
210 /* Statistics */
211 struct xfrm_stats stats;
212
213 struct xfrm_lifetime_cur curlft;
214 struct tasklet_hrtimer mtimer;
215
216 /* Last used time */
217 unsigned long lastused;
218
219 /* Reference to data common to all the instances of this
220 * transformer. */
221 const struct xfrm_type *type;
222 struct xfrm_mode *inner_mode;
223 struct xfrm_mode *inner_mode_iaf;
224 struct xfrm_mode *outer_mode;
225
226 /* Security context */
227 struct xfrm_sec_ctx *security;
228
229 /* Private data of this transformer, format is opaque,
230 * interpreted by xfrm_type methods. */
231 void *data;
232 };
233
234 static inline struct net *xs_net(struct xfrm_state *x)
235 {
236 return read_pnet(&x->xs_net);
237 }
238
239 /* xflags - make enum if more show up */
240 #define XFRM_TIME_DEFER 1
241
242 enum {
243 XFRM_STATE_VOID,
244 XFRM_STATE_ACQ,
245 XFRM_STATE_VALID,
246 XFRM_STATE_ERROR,
247 XFRM_STATE_EXPIRED,
248 XFRM_STATE_DEAD
249 };
250
251 /* callback structure passed from either netlink or pfkey */
252 struct km_event {
253 union {
254 u32 hard;
255 u32 proto;
256 u32 byid;
257 u32 aevent;
258 u32 type;
259 } data;
260
261 u32 seq;
262 u32 pid;
263 u32 event;
264 struct net *net;
265 };
266
267 struct xfrm_replay {
268 void (*advance)(struct xfrm_state *x, __be32 net_seq);
269 int (*check)(struct xfrm_state *x,
270 struct sk_buff *skb,
271 __be32 net_seq);
272 void (*notify)(struct xfrm_state *x, int event);
273 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
274 };
275
276 struct net_device;
277 struct xfrm_type;
278 struct xfrm_dst;
279 struct xfrm_policy_afinfo {
280 unsigned short family;
281 struct dst_ops *dst_ops;
282 void (*garbage_collect)(struct net *net);
283 struct dst_entry *(*dst_lookup)(struct net *net, int tos,
284 const xfrm_address_t *saddr,
285 const xfrm_address_t *daddr);
286 int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr);
287 void (*decode_session)(struct sk_buff *skb,
288 struct flowi *fl,
289 int reverse);
290 int (*get_tos)(const struct flowi *fl);
291 int (*init_path)(struct xfrm_dst *path,
292 struct dst_entry *dst,
293 int nfheader_len);
294 int (*fill_dst)(struct xfrm_dst *xdst,
295 struct net_device *dev,
296 const struct flowi *fl);
297 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
298 };
299
300 extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
301 extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
302 extern void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c);
303 extern void km_state_notify(struct xfrm_state *x, const struct km_event *c);
304
305 struct xfrm_tmpl;
306 extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
307 extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid);
308 extern int __xfrm_state_delete(struct xfrm_state *x);
309
310 struct xfrm_state_afinfo {
311 unsigned int family;
312 unsigned int proto;
313 __be16 eth_proto;
314 struct module *owner;
315 const struct xfrm_type *type_map[IPPROTO_MAX];
316 struct xfrm_mode *mode_map[XFRM_MODE_MAX];
317 int (*init_flags)(struct xfrm_state *x);
318 void (*init_tempsel)(struct xfrm_selector *sel,
319 const struct flowi *fl);
320 void (*init_temprop)(struct xfrm_state *x,
321 const struct xfrm_tmpl *tmpl,
322 const xfrm_address_t *daddr,
323 const xfrm_address_t *saddr);
324 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
325 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
326 int (*output)(struct sk_buff *skb);
327 int (*output_finish)(struct sk_buff *skb);
328 int (*extract_input)(struct xfrm_state *x,
329 struct sk_buff *skb);
330 int (*extract_output)(struct xfrm_state *x,
331 struct sk_buff *skb);
332 int (*transport_finish)(struct sk_buff *skb,
333 int async);
334 };
335
336 extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
337 extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
338
339 extern void xfrm_state_delete_tunnel(struct xfrm_state *x);
340
341 struct xfrm_type {
342 char *description;
343 struct module *owner;
344 u8 proto;
345 u8 flags;
346 #define XFRM_TYPE_NON_FRAGMENT 1
347 #define XFRM_TYPE_REPLAY_PROT 2
348 #define XFRM_TYPE_LOCAL_COADDR 4
349 #define XFRM_TYPE_REMOTE_COADDR 8
350
351 int (*init_state)(struct xfrm_state *x);
352 void (*destructor)(struct xfrm_state *);
353 int (*input)(struct xfrm_state *, struct sk_buff *skb);
354 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
355 int (*reject)(struct xfrm_state *, struct sk_buff *,
356 const struct flowi *);
357 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
358 /* Estimate maximal size of result of transformation of a dgram */
359 u32 (*get_mtu)(struct xfrm_state *, int size);
360 };
361
362 extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
363 extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
364
365 struct xfrm_mode {
366 /*
367 * Remove encapsulation header.
368 *
369 * The IP header will be moved over the top of the encapsulation
370 * header.
371 *
372 * On entry, the transport header shall point to where the IP header
373 * should be and the network header shall be set to where the IP
374 * header currently is. skb->data shall point to the start of the
375 * payload.
376 */
377 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
378
379 /*
380 * This is the actual input entry point.
381 *
382 * For transport mode and equivalent this would be identical to
383 * input2 (which does not need to be set). While tunnel mode
384 * and equivalent would set this to the tunnel encapsulation function
385 * xfrm4_prepare_input that would in turn call input2.
386 */
387 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
388
389 /*
390 * Add encapsulation header.
391 *
392 * On exit, the transport header will be set to the start of the
393 * encapsulation header to be filled in by x->type->output and
394 * the mac header will be set to the nextheader (protocol for
395 * IPv4) field of the extension header directly preceding the
396 * encapsulation header, or in its absence, that of the top IP
397 * header. The value of the network header will always point
398 * to the top IP header while skb->data will point to the payload.
399 */
400 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
401
402 /*
403 * This is the actual output entry point.
404 *
405 * For transport mode and equivalent this would be identical to
406 * output2 (which does not need to be set). While tunnel mode
407 * and equivalent would set this to a tunnel encapsulation function
408 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
409 * call output2.
410 */
411 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
412
413 struct xfrm_state_afinfo *afinfo;
414 struct module *owner;
415 unsigned int encap;
416 int flags;
417 };
418
419 /* Flags for xfrm_mode. */
420 enum {
421 XFRM_MODE_FLAG_TUNNEL = 1,
422 };
423
424 extern int xfrm_register_mode(struct xfrm_mode *mode, int family);
425 extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
426
427 static inline int xfrm_af2proto(unsigned int family)
428 {
429 switch(family) {
430 case AF_INET:
431 return IPPROTO_IPIP;
432 case AF_INET6:
433 return IPPROTO_IPV6;
434 default:
435 return 0;
436 }
437 }
438
439 static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
440 {
441 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
442 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
443 return x->inner_mode;
444 else
445 return x->inner_mode_iaf;
446 }
447
448 struct xfrm_tmpl {
449 /* id in template is interpreted as:
450 * daddr - destination of tunnel, may be zero for transport mode.
451 * spi - zero to acquire spi. Not zero if spi is static, then
452 * daddr must be fixed too.
453 * proto - AH/ESP/IPCOMP
454 */
455 struct xfrm_id id;
456
457 /* Source address of tunnel. Ignored, if it is not a tunnel. */
458 xfrm_address_t saddr;
459
460 unsigned short encap_family;
461
462 u32 reqid;
463
464 /* Mode: transport, tunnel etc. */
465 u8 mode;
466
467 /* Sharing mode: unique, this session only, this user only etc. */
468 u8 share;
469
470 /* May skip this transfomration if no SA is found */
471 u8 optional;
472
473 /* Skip aalgos/ealgos/calgos checks. */
474 u8 allalgs;
475
476 /* Bit mask of algos allowed for acquisition */
477 u32 aalgos;
478 u32 ealgos;
479 u32 calgos;
480 };
481
482 #define XFRM_MAX_DEPTH 6
483
484 struct xfrm_policy_walk_entry {
485 struct list_head all;
486 u8 dead;
487 };
488
489 struct xfrm_policy_walk {
490 struct xfrm_policy_walk_entry walk;
491 u8 type;
492 u32 seq;
493 };
494
495 struct xfrm_policy {
496 #ifdef CONFIG_NET_NS
497 struct net *xp_net;
498 #endif
499 struct hlist_node bydst;
500 struct hlist_node byidx;
501
502 /* This lock only affects elements except for entry. */
503 rwlock_t lock;
504 atomic_t refcnt;
505 struct timer_list timer;
506
507 struct flow_cache_object flo;
508 atomic_t genid;
509 u32 priority;
510 u32 index;
511 struct xfrm_mark mark;
512 struct xfrm_selector selector;
513 struct xfrm_lifetime_cfg lft;
514 struct xfrm_lifetime_cur curlft;
515 struct xfrm_policy_walk_entry walk;
516 u8 type;
517 u8 action;
518 u8 flags;
519 u8 xfrm_nr;
520 u16 family;
521 struct xfrm_sec_ctx *security;
522 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
523 };
524
525 static inline struct net *xp_net(const struct xfrm_policy *xp)
526 {
527 return read_pnet(&xp->xp_net);
528 }
529
530 struct xfrm_kmaddress {
531 xfrm_address_t local;
532 xfrm_address_t remote;
533 u32 reserved;
534 u16 family;
535 };
536
537 struct xfrm_migrate {
538 xfrm_address_t old_daddr;
539 xfrm_address_t old_saddr;
540 xfrm_address_t new_daddr;
541 xfrm_address_t new_saddr;
542 u8 proto;
543 u8 mode;
544 u16 reserved;
545 u32 reqid;
546 u16 old_family;
547 u16 new_family;
548 };
549
550 #define XFRM_KM_TIMEOUT 30
551 /* which seqno */
552 #define XFRM_REPLAY_SEQ 1
553 #define XFRM_REPLAY_OSEQ 2
554 #define XFRM_REPLAY_SEQ_MASK 3
555 /* what happened */
556 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
557 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
558
559 /* default aevent timeout in units of 100ms */
560 #define XFRM_AE_ETIME 10
561 /* Async Event timer multiplier */
562 #define XFRM_AE_ETH_M 10
563 /* default seq threshold size */
564 #define XFRM_AE_SEQT_SIZE 2
565
566 struct xfrm_mgr {
567 struct list_head list;
568 char *id;
569 int (*notify)(struct xfrm_state *x, const struct km_event *c);
570 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir);
571 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
572 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
573 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
574 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
575 int (*migrate)(const struct xfrm_selector *sel,
576 u8 dir, u8 type,
577 const struct xfrm_migrate *m,
578 int num_bundles,
579 const struct xfrm_kmaddress *k);
580 };
581
582 extern int xfrm_register_km(struct xfrm_mgr *km);
583 extern int xfrm_unregister_km(struct xfrm_mgr *km);
584
585 /*
586 * This structure is used for the duration where packets are being
587 * transformed by IPsec. As soon as the packet leaves IPsec the
588 * area beyond the generic IP part may be overwritten.
589 */
590 struct xfrm_skb_cb {
591 union {
592 struct inet_skb_parm h4;
593 struct inet6_skb_parm h6;
594 } header;
595
596 /* Sequence number for replay protection. */
597 union {
598 struct {
599 __u32 low;
600 __u32 hi;
601 } output;
602 struct {
603 __be32 low;
604 __be32 hi;
605 } input;
606 } seq;
607 };
608
609 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
610
611 /*
612 * This structure is used by the afinfo prepare_input/prepare_output functions
613 * to transmit header information to the mode input/output functions.
614 */
615 struct xfrm_mode_skb_cb {
616 union {
617 struct inet_skb_parm h4;
618 struct inet6_skb_parm h6;
619 } header;
620
621 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
622 __be16 id;
623 __be16 frag_off;
624
625 /* IP header length (excluding options or extension headers). */
626 u8 ihl;
627
628 /* TOS for IPv4, class for IPv6. */
629 u8 tos;
630
631 /* TTL for IPv4, hop limitfor IPv6. */
632 u8 ttl;
633
634 /* Protocol for IPv4, NH for IPv6. */
635 u8 protocol;
636
637 /* Option length for IPv4, zero for IPv6. */
638 u8 optlen;
639
640 /* Used by IPv6 only, zero for IPv4. */
641 u8 flow_lbl[3];
642 };
643
644 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
645
646 /*
647 * This structure is used by the input processing to locate the SPI and
648 * related information.
649 */
650 struct xfrm_spi_skb_cb {
651 union {
652 struct inet_skb_parm h4;
653 struct inet6_skb_parm h6;
654 } header;
655
656 unsigned int daddroff;
657 unsigned int family;
658 };
659
660 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
661
662 /* Audit Information */
663 struct xfrm_audit {
664 u32 secid;
665 uid_t loginuid;
666 u32 sessionid;
667 };
668
669 #ifdef CONFIG_AUDITSYSCALL
670 static inline struct audit_buffer *xfrm_audit_start(const char *op)
671 {
672 struct audit_buffer *audit_buf = NULL;
673
674 if (audit_enabled == 0)
675 return NULL;
676 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
677 AUDIT_MAC_IPSEC_EVENT);
678 if (audit_buf == NULL)
679 return NULL;
680 audit_log_format(audit_buf, "op=%s", op);
681 return audit_buf;
682 }
683
684 static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid,
685 struct audit_buffer *audit_buf)
686 {
687 char *secctx;
688 u32 secctx_len;
689
690 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
691 if (secid != 0 &&
692 security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) {
693 audit_log_format(audit_buf, " subj=%s", secctx);
694 security_release_secctx(secctx, secctx_len);
695 } else
696 audit_log_task_context(audit_buf);
697 }
698
699 extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
700 u32 auid, u32 ses, u32 secid);
701 extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
702 u32 auid, u32 ses, u32 secid);
703 extern void xfrm_audit_state_add(struct xfrm_state *x, int result,
704 u32 auid, u32 ses, u32 secid);
705 extern void xfrm_audit_state_delete(struct xfrm_state *x, int result,
706 u32 auid, u32 ses, u32 secid);
707 extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
708 struct sk_buff *skb);
709 extern void xfrm_audit_state_replay(struct xfrm_state *x,
710 struct sk_buff *skb, __be32 net_seq);
711 extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
712 extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
713 __be32 net_spi, __be32 net_seq);
714 extern void xfrm_audit_state_icvfail(struct xfrm_state *x,
715 struct sk_buff *skb, u8 proto);
716 #else
717
718 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
719 u32 auid, u32 ses, u32 secid)
720 {
721 }
722
723 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
724 u32 auid, u32 ses, u32 secid)
725 {
726 }
727
728 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
729 u32 auid, u32 ses, u32 secid)
730 {
731 }
732
733 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
734 u32 auid, u32 ses, u32 secid)
735 {
736 }
737
738 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
739 struct sk_buff *skb)
740 {
741 }
742
743 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
744 struct sk_buff *skb, __be32 net_seq)
745 {
746 }
747
748 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
749 u16 family)
750 {
751 }
752
753 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
754 __be32 net_spi, __be32 net_seq)
755 {
756 }
757
758 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
759 struct sk_buff *skb, u8 proto)
760 {
761 }
762 #endif /* CONFIG_AUDITSYSCALL */
763
764 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
765 {
766 if (likely(policy != NULL))
767 atomic_inc(&policy->refcnt);
768 }
769
770 extern void xfrm_policy_destroy(struct xfrm_policy *policy);
771
772 static inline void xfrm_pol_put(struct xfrm_policy *policy)
773 {
774 if (atomic_dec_and_test(&policy->refcnt))
775 xfrm_policy_destroy(policy);
776 }
777
778 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
779 {
780 int i;
781 for (i = npols - 1; i >= 0; --i)
782 xfrm_pol_put(pols[i]);
783 }
784
785 extern void __xfrm_state_destroy(struct xfrm_state *);
786
787 static inline void __xfrm_state_put(struct xfrm_state *x)
788 {
789 atomic_dec(&x->refcnt);
790 }
791
792 static inline void xfrm_state_put(struct xfrm_state *x)
793 {
794 if (atomic_dec_and_test(&x->refcnt))
795 __xfrm_state_destroy(x);
796 }
797
798 static inline void xfrm_state_hold(struct xfrm_state *x)
799 {
800 atomic_inc(&x->refcnt);
801 }
802
803 static inline bool addr_match(const void *token1, const void *token2,
804 int prefixlen)
805 {
806 const __be32 *a1 = token1;
807 const __be32 *a2 = token2;
808 int pdw;
809 int pbi;
810
811 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
812 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
813
814 if (pdw)
815 if (memcmp(a1, a2, pdw << 2))
816 return false;
817
818 if (pbi) {
819 __be32 mask;
820
821 mask = htonl((0xffffffff) << (32 - pbi));
822
823 if ((a1[pdw] ^ a2[pdw]) & mask)
824 return false;
825 }
826
827 return true;
828 }
829
830 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
831 {
832 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
833 if (prefixlen == 0)
834 return true;
835 return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen)));
836 }
837
838 static __inline__
839 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
840 {
841 __be16 port;
842 switch(fl->flowi_proto) {
843 case IPPROTO_TCP:
844 case IPPROTO_UDP:
845 case IPPROTO_UDPLITE:
846 case IPPROTO_SCTP:
847 port = uli->ports.sport;
848 break;
849 case IPPROTO_ICMP:
850 case IPPROTO_ICMPV6:
851 port = htons(uli->icmpt.type);
852 break;
853 case IPPROTO_MH:
854 port = htons(uli->mht.type);
855 break;
856 case IPPROTO_GRE:
857 port = htons(ntohl(uli->gre_key) >> 16);
858 break;
859 default:
860 port = 0; /*XXX*/
861 }
862 return port;
863 }
864
865 static __inline__
866 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
867 {
868 __be16 port;
869 switch(fl->flowi_proto) {
870 case IPPROTO_TCP:
871 case IPPROTO_UDP:
872 case IPPROTO_UDPLITE:
873 case IPPROTO_SCTP:
874 port = uli->ports.dport;
875 break;
876 case IPPROTO_ICMP:
877 case IPPROTO_ICMPV6:
878 port = htons(uli->icmpt.code);
879 break;
880 case IPPROTO_GRE:
881 port = htons(ntohl(uli->gre_key) & 0xffff);
882 break;
883 default:
884 port = 0; /*XXX*/
885 }
886 return port;
887 }
888
889 extern int xfrm_selector_match(const struct xfrm_selector *sel,
890 const struct flowi *fl,
891 unsigned short family);
892
893 #ifdef CONFIG_SECURITY_NETWORK_XFRM
894 /* If neither has a context --> match
895 * Otherwise, both must have a context and the sids, doi, alg must match
896 */
897 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
898 {
899 return ((!s1 && !s2) ||
900 (s1 && s2 &&
901 (s1->ctx_sid == s2->ctx_sid) &&
902 (s1->ctx_doi == s2->ctx_doi) &&
903 (s1->ctx_alg == s2->ctx_alg)));
904 }
905 #else
906 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
907 {
908 return 1;
909 }
910 #endif
911
912 /* A struct encoding bundle of transformations to apply to some set of flow.
913 *
914 * dst->child points to the next element of bundle.
915 * dst->xfrm points to an instanse of transformer.
916 *
917 * Due to unfortunate limitations of current routing cache, which we
918 * have no time to fix, it mirrors struct rtable and bound to the same
919 * routing key, including saddr,daddr. However, we can have many of
920 * bundles differing by session id. All the bundles grow from a parent
921 * policy rule.
922 */
923 struct xfrm_dst {
924 union {
925 struct dst_entry dst;
926 struct rtable rt;
927 struct rt6_info rt6;
928 } u;
929 struct dst_entry *route;
930 struct flow_cache_object flo;
931 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
932 int num_pols, num_xfrms;
933 #ifdef CONFIG_XFRM_SUB_POLICY
934 struct flowi *origin;
935 struct xfrm_selector *partner;
936 #endif
937 u32 xfrm_genid;
938 u32 policy_genid;
939 u32 route_mtu_cached;
940 u32 child_mtu_cached;
941 u32 route_cookie;
942 u32 path_cookie;
943 };
944
945 #ifdef CONFIG_XFRM
946 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
947 {
948 xfrm_pols_put(xdst->pols, xdst->num_pols);
949 dst_release(xdst->route);
950 if (likely(xdst->u.dst.xfrm))
951 xfrm_state_put(xdst->u.dst.xfrm);
952 #ifdef CONFIG_XFRM_SUB_POLICY
953 kfree(xdst->origin);
954 xdst->origin = NULL;
955 kfree(xdst->partner);
956 xdst->partner = NULL;
957 #endif
958 }
959 #endif
960
961 extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
962
963 struct sec_path {
964 atomic_t refcnt;
965 int len;
966 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
967 };
968
969 static inline int secpath_exists(struct sk_buff *skb)
970 {
971 #ifdef CONFIG_XFRM
972 return skb->sp != NULL;
973 #else
974 return 0;
975 #endif
976 }
977
978 static inline struct sec_path *
979 secpath_get(struct sec_path *sp)
980 {
981 if (sp)
982 atomic_inc(&sp->refcnt);
983 return sp;
984 }
985
986 extern void __secpath_destroy(struct sec_path *sp);
987
988 static inline void
989 secpath_put(struct sec_path *sp)
990 {
991 if (sp && atomic_dec_and_test(&sp->refcnt))
992 __secpath_destroy(sp);
993 }
994
995 extern struct sec_path *secpath_dup(struct sec_path *src);
996
997 static inline void
998 secpath_reset(struct sk_buff *skb)
999 {
1000 #ifdef CONFIG_XFRM
1001 secpath_put(skb->sp);
1002 skb->sp = NULL;
1003 #endif
1004 }
1005
1006 static inline int
1007 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1008 {
1009 switch (family) {
1010 case AF_INET:
1011 return addr->a4 == 0;
1012 case AF_INET6:
1013 return ipv6_addr_any((struct in6_addr *)&addr->a6);
1014 }
1015 return 0;
1016 }
1017
1018 static inline int
1019 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1020 {
1021 return (tmpl->saddr.a4 &&
1022 tmpl->saddr.a4 != x->props.saddr.a4);
1023 }
1024
1025 static inline int
1026 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1027 {
1028 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1029 ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1030 }
1031
1032 static inline int
1033 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1034 {
1035 switch (family) {
1036 case AF_INET:
1037 return __xfrm4_state_addr_cmp(tmpl, x);
1038 case AF_INET6:
1039 return __xfrm6_state_addr_cmp(tmpl, x);
1040 }
1041 return !0;
1042 }
1043
1044 #ifdef CONFIG_XFRM
1045 extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family);
1046
1047 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1048 struct sk_buff *skb,
1049 unsigned int family, int reverse)
1050 {
1051 struct net *net = dev_net(skb->dev);
1052 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1053
1054 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1055 return __xfrm_policy_check(sk, ndir, skb, family);
1056
1057 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
1058 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1059 __xfrm_policy_check(sk, ndir, skb, family);
1060 }
1061
1062 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1063 {
1064 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1065 }
1066
1067 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1068 {
1069 return xfrm_policy_check(sk, dir, skb, AF_INET);
1070 }
1071
1072 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1073 {
1074 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1075 }
1076
1077 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1078 struct sk_buff *skb)
1079 {
1080 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1081 }
1082
1083 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1084 struct sk_buff *skb)
1085 {
1086 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1087 }
1088
1089 extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1090 unsigned int family, int reverse);
1091
1092 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1093 unsigned int family)
1094 {
1095 return __xfrm_decode_session(skb, fl, family, 0);
1096 }
1097
1098 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1099 struct flowi *fl,
1100 unsigned int family)
1101 {
1102 return __xfrm_decode_session(skb, fl, family, 1);
1103 }
1104
1105 extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1106
1107 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1108 {
1109 struct net *net = dev_net(skb->dev);
1110
1111 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1112 (skb_dst(skb)->flags & DST_NOXFRM) ||
1113 __xfrm_route_forward(skb, family);
1114 }
1115
1116 static inline int xfrm4_route_forward(struct sk_buff *skb)
1117 {
1118 return xfrm_route_forward(skb, AF_INET);
1119 }
1120
1121 static inline int xfrm6_route_forward(struct sk_buff *skb)
1122 {
1123 return xfrm_route_forward(skb, AF_INET6);
1124 }
1125
1126 extern int __xfrm_sk_clone_policy(struct sock *sk);
1127
1128 static inline int xfrm_sk_clone_policy(struct sock *sk)
1129 {
1130 if (unlikely(sk->sk_policy[0] || sk->sk_policy[1]))
1131 return __xfrm_sk_clone_policy(sk);
1132 return 0;
1133 }
1134
1135 extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1136
1137 static inline void xfrm_sk_free_policy(struct sock *sk)
1138 {
1139 if (unlikely(sk->sk_policy[0] != NULL)) {
1140 xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX);
1141 sk->sk_policy[0] = NULL;
1142 }
1143 if (unlikely(sk->sk_policy[1] != NULL)) {
1144 xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1);
1145 sk->sk_policy[1] = NULL;
1146 }
1147 }
1148
1149 #else
1150
1151 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1152 static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; }
1153 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1154 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1155 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1156 {
1157 return 1;
1158 }
1159 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1160 {
1161 return 1;
1162 }
1163 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1164 {
1165 return 1;
1166 }
1167 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1168 struct flowi *fl,
1169 unsigned int family)
1170 {
1171 return -ENOSYS;
1172 }
1173 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1174 struct sk_buff *skb)
1175 {
1176 return 1;
1177 }
1178 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1179 struct sk_buff *skb)
1180 {
1181 return 1;
1182 }
1183 #endif
1184
1185 static __inline__
1186 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1187 {
1188 switch (family){
1189 case AF_INET:
1190 return (xfrm_address_t *)&fl->u.ip4.daddr;
1191 case AF_INET6:
1192 return (xfrm_address_t *)&fl->u.ip6.daddr;
1193 }
1194 return NULL;
1195 }
1196
1197 static __inline__
1198 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1199 {
1200 switch (family){
1201 case AF_INET:
1202 return (xfrm_address_t *)&fl->u.ip4.saddr;
1203 case AF_INET6:
1204 return (xfrm_address_t *)&fl->u.ip6.saddr;
1205 }
1206 return NULL;
1207 }
1208
1209 static __inline__
1210 void xfrm_flowi_addr_get(const struct flowi *fl,
1211 xfrm_address_t *saddr, xfrm_address_t *daddr,
1212 unsigned short family)
1213 {
1214 switch(family) {
1215 case AF_INET:
1216 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1217 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1218 break;
1219 case AF_INET6:
1220 *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr;
1221 *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr;
1222 break;
1223 }
1224 }
1225
1226 static __inline__ int
1227 __xfrm4_state_addr_check(const struct xfrm_state *x,
1228 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1229 {
1230 if (daddr->a4 == x->id.daddr.a4 &&
1231 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1232 return 1;
1233 return 0;
1234 }
1235
1236 static __inline__ int
1237 __xfrm6_state_addr_check(const struct xfrm_state *x,
1238 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1239 {
1240 if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1241 (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)||
1242 ipv6_addr_any((struct in6_addr *)saddr) ||
1243 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1244 return 1;
1245 return 0;
1246 }
1247
1248 static __inline__ int
1249 xfrm_state_addr_check(const struct xfrm_state *x,
1250 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1251 unsigned short family)
1252 {
1253 switch (family) {
1254 case AF_INET:
1255 return __xfrm4_state_addr_check(x, daddr, saddr);
1256 case AF_INET6:
1257 return __xfrm6_state_addr_check(x, daddr, saddr);
1258 }
1259 return 0;
1260 }
1261
1262 static __inline__ int
1263 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1264 unsigned short family)
1265 {
1266 switch (family) {
1267 case AF_INET:
1268 return __xfrm4_state_addr_check(x,
1269 (const xfrm_address_t *)&fl->u.ip4.daddr,
1270 (const xfrm_address_t *)&fl->u.ip4.saddr);
1271 case AF_INET6:
1272 return __xfrm6_state_addr_check(x,
1273 (const xfrm_address_t *)&fl->u.ip6.daddr,
1274 (const xfrm_address_t *)&fl->u.ip6.saddr);
1275 }
1276 return 0;
1277 }
1278
1279 static inline int xfrm_state_kern(const struct xfrm_state *x)
1280 {
1281 return atomic_read(&x->tunnel_users);
1282 }
1283
1284 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1285 {
1286 return (!userproto || proto == userproto ||
1287 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1288 proto == IPPROTO_ESP ||
1289 proto == IPPROTO_COMP)));
1290 }
1291
1292 /*
1293 * xfrm algorithm information
1294 */
1295 struct xfrm_algo_aead_info {
1296 u16 icv_truncbits;
1297 };
1298
1299 struct xfrm_algo_auth_info {
1300 u16 icv_truncbits;
1301 u16 icv_fullbits;
1302 };
1303
1304 struct xfrm_algo_encr_info {
1305 u16 blockbits;
1306 u16 defkeybits;
1307 };
1308
1309 struct xfrm_algo_comp_info {
1310 u16 threshold;
1311 };
1312
1313 struct xfrm_algo_desc {
1314 char *name;
1315 char *compat;
1316 u8 available:1;
1317 union {
1318 struct xfrm_algo_aead_info aead;
1319 struct xfrm_algo_auth_info auth;
1320 struct xfrm_algo_encr_info encr;
1321 struct xfrm_algo_comp_info comp;
1322 } uinfo;
1323 struct sadb_alg desc;
1324 };
1325
1326 /* XFRM tunnel handlers. */
1327 struct xfrm_tunnel {
1328 int (*handler)(struct sk_buff *skb);
1329 int (*err_handler)(struct sk_buff *skb, u32 info);
1330
1331 struct xfrm_tunnel __rcu *next;
1332 int priority;
1333 };
1334
1335 struct xfrm6_tunnel {
1336 int (*handler)(struct sk_buff *skb);
1337 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1338 u8 type, u8 code, int offset, __be32 info);
1339 struct xfrm6_tunnel __rcu *next;
1340 int priority;
1341 };
1342
1343 extern void xfrm_init(void);
1344 extern void xfrm4_init(int rt_hash_size);
1345 extern int xfrm_state_init(struct net *net);
1346 extern void xfrm_state_fini(struct net *net);
1347 extern void xfrm4_state_init(void);
1348 #ifdef CONFIG_XFRM
1349 extern int xfrm6_init(void);
1350 extern void xfrm6_fini(void);
1351 extern int xfrm6_state_init(void);
1352 extern void xfrm6_state_fini(void);
1353 #else
1354 static inline int xfrm6_init(void)
1355 {
1356 return 0;
1357 }
1358 static inline void xfrm6_fini(void)
1359 {
1360 ;
1361 }
1362 #endif
1363
1364 #ifdef CONFIG_XFRM_STATISTICS
1365 extern int xfrm_proc_init(struct net *net);
1366 extern void xfrm_proc_fini(struct net *net);
1367 #endif
1368
1369 extern int xfrm_sysctl_init(struct net *net);
1370 #ifdef CONFIG_SYSCTL
1371 extern void xfrm_sysctl_fini(struct net *net);
1372 #else
1373 static inline void xfrm_sysctl_fini(struct net *net)
1374 {
1375 }
1376 #endif
1377
1378 extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto);
1379 extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1380 int (*func)(struct xfrm_state *, int, void*), void *);
1381 extern void xfrm_state_walk_done(struct xfrm_state_walk *walk);
1382 extern struct xfrm_state *xfrm_state_alloc(struct net *net);
1383 extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1384 const xfrm_address_t *saddr,
1385 const struct flowi *fl,
1386 struct xfrm_tmpl *tmpl,
1387 struct xfrm_policy *pol, int *err,
1388 unsigned short family);
1389 extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1390 xfrm_address_t *daddr,
1391 xfrm_address_t *saddr,
1392 unsigned short family,
1393 u8 mode, u8 proto, u32 reqid);
1394 extern int xfrm_state_check_expire(struct xfrm_state *x);
1395 extern void xfrm_state_insert(struct xfrm_state *x);
1396 extern int xfrm_state_add(struct xfrm_state *x);
1397 extern int xfrm_state_update(struct xfrm_state *x);
1398 extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1399 const xfrm_address_t *daddr, __be32 spi,
1400 u8 proto, unsigned short family);
1401 extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1402 const xfrm_address_t *daddr,
1403 const xfrm_address_t *saddr,
1404 u8 proto,
1405 unsigned short family);
1406 #ifdef CONFIG_XFRM_SUB_POLICY
1407 extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1408 int n, unsigned short family);
1409 extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1410 int n, unsigned short family);
1411 #else
1412 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1413 int n, unsigned short family)
1414 {
1415 return -ENOSYS;
1416 }
1417
1418 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1419 int n, unsigned short family)
1420 {
1421 return -ENOSYS;
1422 }
1423 #endif
1424
1425 struct xfrmk_sadinfo {
1426 u32 sadhcnt; /* current hash bkts */
1427 u32 sadhmcnt; /* max allowed hash bkts */
1428 u32 sadcnt; /* current running count */
1429 };
1430
1431 struct xfrmk_spdinfo {
1432 u32 incnt;
1433 u32 outcnt;
1434 u32 fwdcnt;
1435 u32 inscnt;
1436 u32 outscnt;
1437 u32 fwdscnt;
1438 u32 spdhcnt;
1439 u32 spdhmcnt;
1440 };
1441
1442 extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark,
1443 u32 seq);
1444 extern int xfrm_state_delete(struct xfrm_state *x);
1445 extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info);
1446 extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1447 extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1448 extern u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1449 extern int xfrm_init_replay(struct xfrm_state *x);
1450 extern int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1451 extern int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
1452 extern int xfrm_init_state(struct xfrm_state *x);
1453 extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1454 extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi,
1455 int encap_type);
1456 extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1457 extern int xfrm_output_resume(struct sk_buff *skb, int err);
1458 extern int xfrm_output(struct sk_buff *skb);
1459 extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1460 extern int xfrm4_extract_header(struct sk_buff *skb);
1461 extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1462 extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1463 int encap_type);
1464 extern int xfrm4_transport_finish(struct sk_buff *skb, int async);
1465 extern int xfrm4_rcv(struct sk_buff *skb);
1466
1467 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1468 {
1469 return xfrm4_rcv_encap(skb, nexthdr, spi, 0);
1470 }
1471
1472 extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1473 extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1474 extern int xfrm4_output(struct sk_buff *skb);
1475 extern int xfrm4_output_finish(struct sk_buff *skb);
1476 extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1477 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1478 extern int xfrm6_extract_header(struct sk_buff *skb);
1479 extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1480 extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi);
1481 extern int xfrm6_transport_finish(struct sk_buff *skb, int async);
1482 extern int xfrm6_rcv(struct sk_buff *skb);
1483 extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1484 xfrm_address_t *saddr, u8 proto);
1485 extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1486 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1487 extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1488 extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1489 extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1490 extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1491 extern int xfrm6_output(struct sk_buff *skb);
1492 extern int xfrm6_output_finish(struct sk_buff *skb);
1493 extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1494 u8 **prevhdr);
1495
1496 #ifdef CONFIG_XFRM
1497 extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1498 extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen);
1499 #else
1500 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1501 {
1502 return -ENOPROTOOPT;
1503 }
1504
1505 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1506 {
1507 /* should not happen */
1508 kfree_skb(skb);
1509 return 0;
1510 }
1511 #endif
1512
1513 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1514
1515 extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1516 extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1517 int (*func)(struct xfrm_policy *, int, int, void*), void *);
1518 extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk);
1519 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1520 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1521 u8 type, int dir,
1522 struct xfrm_selector *sel,
1523 struct xfrm_sec_ctx *ctx, int delete,
1524 int *err);
1525 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err);
1526 int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info);
1527 u32 xfrm_get_acqseq(void);
1528 extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1529 struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark,
1530 u8 mode, u32 reqid, u8 proto,
1531 const xfrm_address_t *daddr,
1532 const xfrm_address_t *saddr, int create,
1533 unsigned short family);
1534 extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1535
1536 #ifdef CONFIG_XFRM_MIGRATE
1537 extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1538 const struct xfrm_migrate *m, int num_bundles,
1539 const struct xfrm_kmaddress *k);
1540 extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m);
1541 extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
1542 struct xfrm_migrate *m);
1543 extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1544 struct xfrm_migrate *m, int num_bundles,
1545 struct xfrm_kmaddress *k);
1546 #endif
1547
1548 extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1549 extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid);
1550 extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
1551
1552 extern void xfrm_input_init(void);
1553 extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1554
1555 extern void xfrm_probe_algs(void);
1556 extern int xfrm_count_auth_supported(void);
1557 extern int xfrm_count_enc_supported(void);
1558 extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1559 extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1560 extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1561 extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1562 extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1563 extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1564 extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1565 extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1566 extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1567 int probe);
1568
1569 struct hash_desc;
1570 struct scatterlist;
1571 typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *,
1572 unsigned int);
1573
1574 static inline int xfrm_addr_cmp(const xfrm_address_t *a,
1575 const xfrm_address_t *b,
1576 int family)
1577 {
1578 switch (family) {
1579 default:
1580 case AF_INET:
1581 return (__force u32)a->a4 - (__force u32)b->a4;
1582 case AF_INET6:
1583 return ipv6_addr_cmp((const struct in6_addr *)a,
1584 (const struct in6_addr *)b);
1585 }
1586 }
1587
1588 static inline int xfrm_policy_id2dir(u32 index)
1589 {
1590 return index & 7;
1591 }
1592
1593 #ifdef CONFIG_XFRM
1594 static inline int xfrm_aevent_is_on(struct net *net)
1595 {
1596 struct sock *nlsk;
1597 int ret = 0;
1598
1599 rcu_read_lock();
1600 nlsk = rcu_dereference(net->xfrm.nlsk);
1601 if (nlsk)
1602 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1603 rcu_read_unlock();
1604 return ret;
1605 }
1606 #endif
1607
1608 static inline int xfrm_alg_len(const struct xfrm_algo *alg)
1609 {
1610 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1611 }
1612
1613 static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1614 {
1615 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1616 }
1617
1618 static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1619 {
1620 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1621 }
1622
1623 #ifdef CONFIG_XFRM_MIGRATE
1624 static inline int xfrm_replay_clone(struct xfrm_state *x,
1625 struct xfrm_state *orig)
1626 {
1627 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1628 GFP_KERNEL);
1629 if (!x->replay_esn)
1630 return -ENOMEM;
1631
1632 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1633 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1634
1635 x->preplay_esn = kmemdup(x->replay_esn,
1636 xfrm_replay_state_esn_len(x->replay_esn),
1637 GFP_KERNEL);
1638 if (!x->preplay_esn) {
1639 kfree(x->replay_esn);
1640 return -ENOMEM;
1641 }
1642
1643 return 0;
1644 }
1645
1646 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1647 {
1648 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1649 }
1650
1651 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1652 {
1653 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1654 }
1655
1656 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1657 {
1658 int i;
1659 for (i = 0; i < n; i++)
1660 xfrm_state_put(*(states + i));
1661 }
1662
1663 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1664 {
1665 int i;
1666 for (i = 0; i < n; i++)
1667 xfrm_state_delete(*(states + i));
1668 }
1669 #endif
1670
1671 #ifdef CONFIG_XFRM
1672 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1673 {
1674 return skb->sp->xvec[skb->sp->len - 1];
1675 }
1676 #endif
1677
1678 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1679 {
1680 if (attrs[XFRMA_MARK])
1681 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1682 else
1683 m->v = m->m = 0;
1684
1685 return m->v & m->m;
1686 }
1687
1688 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1689 {
1690 if (m->m | m->v)
1691 NLA_PUT(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1692 return 0;
1693
1694 nla_put_failure:
1695 return -1;
1696 }
1697
1698 #endif /* _NET_XFRM_H */
kernel source for telekom puls (alcatel/mediatek)