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>
20 #include <net/route.h>
22 #include <net/ip6_fib.h>
25 #include <linux/interrupt.h>
27 #ifdef CONFIG_XFRM_STATISTICS
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
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))
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)
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))
56 extern struct mutex xfrm_cfg_mutex;
58 /* Organization of SPD aka "XFRM rules"
59 ------------------------------------
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
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.)
72 Lookup is plain linear search until the first match with selector.
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.
81 dst -. xfrm .-> xfrm_state #1
82 |---. child .-> dst -. xfrm .-> xfrm_state #2
83 |---. child .-> dst -. xfrm .-> xfrm_state #3
86 Bundles are cached at xrfm_policy struct (field ->bundles).
89 Resolution of xrfm_tmpl
90 -----------------------
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
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.
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.
119 struct xfrm_state_walk {
120 struct list_head all;
129 /* Full description of state of transformer. */
135 struct hlist_node gclist;
136 struct hlist_node bydst;
138 struct hlist_node bysrc;
139 struct hlist_node byspi;
145 struct xfrm_selector sel;
146 struct xfrm_mark mark;
151 /* Key manager bits */
152 struct xfrm_state_walk km;
154 /* Parameters of this state. */
159 u8 aalgo, ealgo, calgo;
162 xfrm_address_t saddr;
168 struct xfrm_lifetime_cfg lft;
170 /* Data for transformer */
171 struct xfrm_algo_auth *aalg;
172 struct xfrm_algo *ealg;
173 struct xfrm_algo *calg;
174 struct xfrm_algo_aead *aead;
176 /* Data for encapsulator */
177 struct xfrm_encap_tmpl *encap;
179 /* Data for care-of address */
180 xfrm_address_t *coaddr;
182 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
183 struct xfrm_state *tunnel;
185 /* If a tunnel, number of users + 1 */
186 atomic_t tunnel_users;
188 /* State for replay detection */
189 struct xfrm_replay_state replay;
190 struct xfrm_replay_state_esn *replay_esn;
192 /* Replay detection state at the time we sent the last notification */
193 struct xfrm_replay_state preplay;
194 struct xfrm_replay_state_esn *preplay_esn;
196 /* The functions for replay detection. */
197 struct xfrm_replay *repl;
199 /* internal flag that only holds state for delayed aevent at the
204 /* Replay detection notification settings */
208 /* Replay detection notification timer */
209 struct timer_list rtimer;
212 struct xfrm_stats stats;
214 struct xfrm_lifetime_cur curlft;
215 struct tasklet_hrtimer mtimer;
217 /* used to fix curlft->add_time when changing date */
221 unsigned long lastused;
223 /* Reference to data common to all the instances of this
225 const struct xfrm_type *type;
226 struct xfrm_mode *inner_mode;
227 struct xfrm_mode *inner_mode_iaf;
228 struct xfrm_mode *outer_mode;
230 /* Security context */
231 struct xfrm_sec_ctx *security;
233 /* Private data of this transformer, format is opaque,
234 * interpreted by xfrm_type methods. */
238 static inline struct net *xs_net(struct xfrm_state *x)
240 return read_pnet(&x->xs_net);
243 /* xflags - make enum if more show up */
244 #define XFRM_TIME_DEFER 1
245 #define XFRM_SOFT_EXPIRE 2
256 /* callback structure passed from either netlink or pfkey */
273 void (*advance)(struct xfrm_state *x, __be32 net_seq);
274 int (*check)(struct xfrm_state *x,
277 int (*recheck)(struct xfrm_state *x,
280 void (*notify)(struct xfrm_state *x, int event);
281 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
287 struct xfrm_policy_afinfo {
288 unsigned short family;
289 struct dst_ops *dst_ops;
290 void (*garbage_collect)(struct net *net);
291 struct dst_entry *(*dst_lookup)(struct net *net, int tos,
292 const xfrm_address_t *saddr,
293 const xfrm_address_t *daddr);
294 int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr);
295 void (*decode_session)(struct sk_buff *skb,
298 int (*get_tos)(const struct flowi *fl);
299 void (*init_dst)(struct net *net,
300 struct xfrm_dst *dst);
301 int (*init_path)(struct xfrm_dst *path,
302 struct dst_entry *dst,
304 int (*fill_dst)(struct xfrm_dst *xdst,
305 struct net_device *dev,
306 const struct flowi *fl);
307 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
310 int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
311 int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
312 void km_policy_notify(struct xfrm_policy *xp, int dir,
313 const struct km_event *c);
314 void km_state_notify(struct xfrm_state *x, const struct km_event *c);
317 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
318 struct xfrm_policy *pol);
319 void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
320 int __xfrm_state_delete(struct xfrm_state *x);
322 struct xfrm_state_afinfo {
326 struct module *owner;
327 const struct xfrm_type *type_map[IPPROTO_MAX];
328 struct xfrm_mode *mode_map[XFRM_MODE_MAX];
329 int (*init_flags)(struct xfrm_state *x);
330 void (*init_tempsel)(struct xfrm_selector *sel,
331 const struct flowi *fl);
332 void (*init_temprop)(struct xfrm_state *x,
333 const struct xfrm_tmpl *tmpl,
334 const xfrm_address_t *daddr,
335 const xfrm_address_t *saddr);
336 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
337 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
338 int (*output)(struct sk_buff *skb);
339 int (*output_finish)(struct sk_buff *skb);
340 int (*extract_input)(struct xfrm_state *x,
341 struct sk_buff *skb);
342 int (*extract_output)(struct xfrm_state *x,
343 struct sk_buff *skb);
344 int (*transport_finish)(struct sk_buff *skb,
346 void (*local_error)(struct sk_buff *skb, u32 mtu);
349 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
350 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
351 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
352 void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
354 void xfrm_state_delete_tunnel(struct xfrm_state *x);
358 struct module *owner;
361 #define XFRM_TYPE_NON_FRAGMENT 1
362 #define XFRM_TYPE_REPLAY_PROT 2
363 #define XFRM_TYPE_LOCAL_COADDR 4
364 #define XFRM_TYPE_REMOTE_COADDR 8
366 int (*init_state)(struct xfrm_state *x);
367 void (*destructor)(struct xfrm_state *);
368 int (*input)(struct xfrm_state *, struct sk_buff *skb);
369 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
370 int (*reject)(struct xfrm_state *, struct sk_buff *,
371 const struct flowi *);
372 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
373 /* Estimate maximal size of result of transformation of a dgram */
374 u32 (*get_mtu)(struct xfrm_state *, int size);
377 int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
378 int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
382 * Remove encapsulation header.
384 * The IP header will be moved over the top of the encapsulation
387 * On entry, the transport header shall point to where the IP header
388 * should be and the network header shall be set to where the IP
389 * header currently is. skb->data shall point to the start of the
392 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
395 * This is the actual input entry point.
397 * For transport mode and equivalent this would be identical to
398 * input2 (which does not need to be set). While tunnel mode
399 * and equivalent would set this to the tunnel encapsulation function
400 * xfrm4_prepare_input that would in turn call input2.
402 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
405 * Add encapsulation header.
407 * On exit, the transport header will be set to the start of the
408 * encapsulation header to be filled in by x->type->output and
409 * the mac header will be set to the nextheader (protocol for
410 * IPv4) field of the extension header directly preceding the
411 * encapsulation header, or in its absence, that of the top IP
412 * header. The value of the network header will always point
413 * to the top IP header while skb->data will point to the payload.
415 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
418 * This is the actual output entry point.
420 * For transport mode and equivalent this would be identical to
421 * output2 (which does not need to be set). While tunnel mode
422 * and equivalent would set this to a tunnel encapsulation function
423 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
426 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
428 struct xfrm_state_afinfo *afinfo;
429 struct module *owner;
434 /* Flags for xfrm_mode. */
436 XFRM_MODE_FLAG_TUNNEL = 1,
439 int xfrm_register_mode(struct xfrm_mode *mode, int family);
440 int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
442 static inline int xfrm_af2proto(unsigned int family)
454 static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
456 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
457 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
458 return x->inner_mode;
460 return x->inner_mode_iaf;
464 /* id in template is interpreted as:
465 * daddr - destination of tunnel, may be zero for transport mode.
466 * spi - zero to acquire spi. Not zero if spi is static, then
467 * daddr must be fixed too.
468 * proto - AH/ESP/IPCOMP
472 /* Source address of tunnel. Ignored, if it is not a tunnel. */
473 xfrm_address_t saddr;
475 unsigned short encap_family;
479 /* Mode: transport, tunnel etc. */
482 /* Sharing mode: unique, this session only, this user only etc. */
485 /* May skip this transfomration if no SA is found */
488 /* Skip aalgos/ealgos/calgos checks. */
491 /* Bit mask of algos allowed for acquisition */
497 #define XFRM_MAX_DEPTH 6
499 struct xfrm_policy_walk_entry {
500 struct list_head all;
504 struct xfrm_policy_walk {
505 struct xfrm_policy_walk_entry walk;
510 struct xfrm_policy_queue {
511 struct sk_buff_head hold_queue;
512 struct timer_list hold_timer;
513 unsigned long timeout;
520 struct hlist_node bydst;
521 struct hlist_node byidx;
523 /* This lock only affects elements except for entry. */
526 struct timer_list timer;
528 struct flow_cache_object flo;
532 struct xfrm_mark mark;
533 struct xfrm_selector selector;
534 struct xfrm_lifetime_cfg lft;
535 struct xfrm_lifetime_cur curlft;
536 struct xfrm_policy_walk_entry walk;
537 struct xfrm_policy_queue polq;
543 struct xfrm_sec_ctx *security;
544 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
547 static inline struct net *xp_net(const struct xfrm_policy *xp)
549 return read_pnet(&xp->xp_net);
552 struct xfrm_kmaddress {
553 xfrm_address_t local;
554 xfrm_address_t remote;
559 struct xfrm_migrate {
560 xfrm_address_t old_daddr;
561 xfrm_address_t old_saddr;
562 xfrm_address_t new_daddr;
563 xfrm_address_t new_saddr;
572 #define XFRM_KM_TIMEOUT 30
574 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
575 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
577 /* default aevent timeout in units of 100ms */
578 #define XFRM_AE_ETIME 10
579 /* Async Event timer multiplier */
580 #define XFRM_AE_ETH_M 10
581 /* default seq threshold size */
582 #define XFRM_AE_SEQT_SIZE 2
585 struct list_head list;
587 int (*notify)(struct xfrm_state *x, const struct km_event *c);
588 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
589 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
590 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
591 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
592 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
593 int (*migrate)(const struct xfrm_selector *sel,
595 const struct xfrm_migrate *m,
597 const struct xfrm_kmaddress *k);
600 int xfrm_register_km(struct xfrm_mgr *km);
601 int xfrm_unregister_km(struct xfrm_mgr *km);
604 * This structure is used for the duration where packets are being
605 * transformed by IPsec. As soon as the packet leaves IPsec the
606 * area beyond the generic IP part may be overwritten.
610 struct inet_skb_parm h4;
611 struct inet6_skb_parm h6;
614 /* Sequence number for replay protection. */
627 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
630 * This structure is used by the afinfo prepare_input/prepare_output functions
631 * to transmit header information to the mode input/output functions.
633 struct xfrm_mode_skb_cb {
635 struct inet_skb_parm h4;
636 struct inet6_skb_parm h6;
639 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
643 /* IP header length (excluding options or extension headers). */
646 /* TOS for IPv4, class for IPv6. */
649 /* TTL for IPv4, hop limitfor IPv6. */
652 /* Protocol for IPv4, NH for IPv6. */
655 /* Option length for IPv4, zero for IPv6. */
658 /* Used by IPv6 only, zero for IPv4. */
662 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
665 * This structure is used by the input processing to locate the SPI and
666 * related information.
668 struct xfrm_spi_skb_cb {
670 struct inet_skb_parm h4;
671 struct inet6_skb_parm h6;
674 unsigned int daddroff;
678 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
680 /* Audit Information */
687 #ifdef CONFIG_AUDITSYSCALL
688 static inline struct audit_buffer *xfrm_audit_start(const char *op)
690 struct audit_buffer *audit_buf = NULL;
692 if (audit_enabled == 0)
694 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
695 AUDIT_MAC_IPSEC_EVENT);
696 if (audit_buf == NULL)
698 audit_log_format(audit_buf, "op=%s", op);
702 static inline void xfrm_audit_helper_usrinfo(kuid_t auid, u32 ses, u32 secid,
703 struct audit_buffer *audit_buf)
708 audit_log_format(audit_buf, " auid=%u ses=%u",
709 from_kuid(&init_user_ns, auid), ses);
711 security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) {
712 audit_log_format(audit_buf, " subj=%s", secctx);
713 security_release_secctx(secctx, secctx_len);
715 audit_log_task_context(audit_buf);
718 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, kuid_t auid,
720 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, kuid_t auid,
722 void xfrm_audit_state_add(struct xfrm_state *x, int result, kuid_t auid,
724 void xfrm_audit_state_delete(struct xfrm_state *x, int result, kuid_t auid,
726 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
727 struct sk_buff *skb);
728 void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
730 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
731 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
733 void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
737 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
738 kuid_t auid, u32 ses, u32 secid)
742 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
743 kuid_t auid, u32 ses, u32 secid)
747 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
748 kuid_t auid, u32 ses, u32 secid)
752 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
753 kuid_t auid, u32 ses, u32 secid)
757 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
762 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
763 struct sk_buff *skb, __be32 net_seq)
767 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
772 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
773 __be32 net_spi, __be32 net_seq)
777 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
778 struct sk_buff *skb, u8 proto)
781 #endif /* CONFIG_AUDITSYSCALL */
783 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
785 if (likely(policy != NULL))
786 atomic_inc(&policy->refcnt);
789 void xfrm_policy_destroy(struct xfrm_policy *policy);
791 static inline void xfrm_pol_put(struct xfrm_policy *policy)
793 if (atomic_dec_and_test(&policy->refcnt))
794 xfrm_policy_destroy(policy);
797 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
800 for (i = npols - 1; i >= 0; --i)
801 xfrm_pol_put(pols[i]);
804 void __xfrm_state_destroy(struct xfrm_state *);
806 static inline void __xfrm_state_put(struct xfrm_state *x)
808 atomic_dec(&x->refcnt);
811 static inline void xfrm_state_put(struct xfrm_state *x)
813 if (atomic_dec_and_test(&x->refcnt))
814 __xfrm_state_destroy(x);
817 static inline void xfrm_state_hold(struct xfrm_state *x)
819 atomic_inc(&x->refcnt);
822 static inline bool addr_match(const void *token1, const void *token2,
825 const __be32 *a1 = token1;
826 const __be32 *a2 = token2;
830 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
831 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
834 if (memcmp(a1, a2, pdw << 2))
840 mask = htonl((0xffffffff) << (32 - pbi));
842 if ((a1[pdw] ^ a2[pdw]) & mask)
849 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
851 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
854 return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen)));
858 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
861 switch(fl->flowi_proto) {
864 case IPPROTO_UDPLITE:
866 port = uli->ports.sport;
870 port = htons(uli->icmpt.type);
873 port = htons(uli->mht.type);
876 port = htons(ntohl(uli->gre_key) >> 16);
885 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
888 switch(fl->flowi_proto) {
891 case IPPROTO_UDPLITE:
893 port = uli->ports.dport;
897 port = htons(uli->icmpt.code);
900 port = htons(ntohl(uli->gre_key) & 0xffff);
908 bool xfrm_selector_match(const struct xfrm_selector *sel,
909 const struct flowi *fl, unsigned short family);
911 #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
915 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
917 return ((!s1 && !s2) ||
919 (s1->ctx_sid == s2->ctx_sid) &&
920 (s1->ctx_doi == s2->ctx_doi) &&
921 (s1->ctx_alg == s2->ctx_alg)));
924 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
930 /* A struct encoding bundle of transformations to apply to some set of flow.
932 * dst->child points to the next element of bundle.
933 * dst->xfrm points to an instanse of transformer.
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
943 struct dst_entry dst;
947 struct dst_entry *route;
948 struct flow_cache_object flo;
949 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
950 int num_pols, num_xfrms;
951 #ifdef CONFIG_XFRM_SUB_POLICY
952 struct flowi *origin;
953 struct xfrm_selector *partner;
957 u32 route_mtu_cached;
958 u32 child_mtu_cached;
964 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
966 xfrm_pols_put(xdst->pols, xdst->num_pols);
967 dst_release(xdst->route);
968 if (likely(xdst->u.dst.xfrm))
969 xfrm_state_put(xdst->u.dst.xfrm);
970 #ifdef CONFIG_XFRM_SUB_POLICY
973 kfree(xdst->partner);
974 xdst->partner = NULL;
979 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
984 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
987 static inline int secpath_exists(struct sk_buff *skb)
990 return skb->sp != NULL;
996 static inline struct sec_path *
997 secpath_get(struct sec_path *sp)
1000 atomic_inc(&sp->refcnt);
1004 void __secpath_destroy(struct sec_path *sp);
1007 secpath_put(struct sec_path *sp)
1009 if (sp && atomic_dec_and_test(&sp->refcnt))
1010 __secpath_destroy(sp);
1013 struct sec_path *secpath_dup(struct sec_path *src);
1016 secpath_reset(struct sk_buff *skb)
1019 secpath_put(skb->sp);
1025 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1029 return addr->a4 == 0;
1031 return ipv6_addr_any((struct in6_addr *)&addr->a6);
1037 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1039 return (tmpl->saddr.a4 &&
1040 tmpl->saddr.a4 != x->props.saddr.a4);
1044 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1046 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1047 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1051 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1055 return __xfrm4_state_addr_cmp(tmpl, x);
1057 return __xfrm6_state_addr_cmp(tmpl, x);
1063 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1064 unsigned short family);
1066 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1067 struct sk_buff *skb,
1068 unsigned int family, int reverse)
1070 struct net *net = dev_net(skb->dev);
1071 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1073 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1074 return __xfrm_policy_check(sk, ndir, skb, family);
1076 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
1077 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1078 __xfrm_policy_check(sk, ndir, skb, family);
1081 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1083 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1086 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1088 return xfrm_policy_check(sk, dir, skb, AF_INET);
1091 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1093 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1096 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1097 struct sk_buff *skb)
1099 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1102 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1103 struct sk_buff *skb)
1105 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1108 int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1109 unsigned int family, int reverse);
1111 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1112 unsigned int family)
1114 return __xfrm_decode_session(skb, fl, family, 0);
1117 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1119 unsigned int family)
1121 return __xfrm_decode_session(skb, fl, family, 1);
1124 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1126 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1128 struct net *net = dev_net(skb->dev);
1130 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1131 (skb_dst(skb)->flags & DST_NOXFRM) ||
1132 __xfrm_route_forward(skb, family);
1135 static inline int xfrm4_route_forward(struct sk_buff *skb)
1137 return xfrm_route_forward(skb, AF_INET);
1140 static inline int xfrm6_route_forward(struct sk_buff *skb)
1142 return xfrm_route_forward(skb, AF_INET6);
1145 int __xfrm_sk_clone_policy(struct sock *sk);
1147 static inline int xfrm_sk_clone_policy(struct sock *sk)
1149 if (unlikely(sk->sk_policy[0] || sk->sk_policy[1]))
1150 return __xfrm_sk_clone_policy(sk);
1154 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1156 static inline void xfrm_sk_free_policy(struct sock *sk)
1158 if (unlikely(sk->sk_policy[0] != NULL)) {
1159 xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX);
1160 sk->sk_policy[0] = NULL;
1162 if (unlikely(sk->sk_policy[1] != NULL)) {
1163 xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1);
1164 sk->sk_policy[1] = NULL;
1168 void xfrm_garbage_collect(struct net *net);
1172 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1173 static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; }
1174 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1175 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1176 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1180 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1184 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1188 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1190 unsigned int family)
1194 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1195 struct sk_buff *skb)
1199 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1200 struct sk_buff *skb)
1204 static inline void xfrm_garbage_collect(struct net *net)
1210 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1214 return (xfrm_address_t *)&fl->u.ip4.daddr;
1216 return (xfrm_address_t *)&fl->u.ip6.daddr;
1222 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1226 return (xfrm_address_t *)&fl->u.ip4.saddr;
1228 return (xfrm_address_t *)&fl->u.ip6.saddr;
1234 void xfrm_flowi_addr_get(const struct flowi *fl,
1235 xfrm_address_t *saddr, xfrm_address_t *daddr,
1236 unsigned short family)
1240 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1241 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1244 *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr;
1245 *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr;
1250 static __inline__ int
1251 __xfrm4_state_addr_check(const struct xfrm_state *x,
1252 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1254 if (daddr->a4 == x->id.daddr.a4 &&
1255 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1260 static __inline__ int
1261 __xfrm6_state_addr_check(const struct xfrm_state *x,
1262 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1264 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1265 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1266 ipv6_addr_any((struct in6_addr *)saddr) ||
1267 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1272 static __inline__ int
1273 xfrm_state_addr_check(const struct xfrm_state *x,
1274 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1275 unsigned short family)
1279 return __xfrm4_state_addr_check(x, daddr, saddr);
1281 return __xfrm6_state_addr_check(x, daddr, saddr);
1286 static __inline__ int
1287 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1288 unsigned short family)
1292 return __xfrm4_state_addr_check(x,
1293 (const xfrm_address_t *)&fl->u.ip4.daddr,
1294 (const xfrm_address_t *)&fl->u.ip4.saddr);
1296 return __xfrm6_state_addr_check(x,
1297 (const xfrm_address_t *)&fl->u.ip6.daddr,
1298 (const xfrm_address_t *)&fl->u.ip6.saddr);
1303 static inline int xfrm_state_kern(const struct xfrm_state *x)
1305 return atomic_read(&x->tunnel_users);
1308 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1310 return (!userproto || proto == userproto ||
1311 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1312 proto == IPPROTO_ESP ||
1313 proto == IPPROTO_COMP)));
1317 * xfrm algorithm information
1319 struct xfrm_algo_aead_info {
1323 struct xfrm_algo_auth_info {
1328 struct xfrm_algo_encr_info {
1333 struct xfrm_algo_comp_info {
1337 struct xfrm_algo_desc {
1341 u8 pfkey_supported:1;
1343 struct xfrm_algo_aead_info aead;
1344 struct xfrm_algo_auth_info auth;
1345 struct xfrm_algo_encr_info encr;
1346 struct xfrm_algo_comp_info comp;
1348 struct sadb_alg desc;
1351 /* XFRM tunnel handlers. */
1352 struct xfrm_tunnel {
1353 int (*handler)(struct sk_buff *skb);
1354 int (*err_handler)(struct sk_buff *skb, u32 info);
1356 struct xfrm_tunnel __rcu *next;
1360 struct xfrm_tunnel_notifier {
1361 int (*handler)(struct sk_buff *skb);
1362 struct xfrm_tunnel_notifier __rcu *next;
1366 struct xfrm6_tunnel {
1367 int (*handler)(struct sk_buff *skb);
1368 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1369 u8 type, u8 code, int offset, __be32 info);
1370 struct xfrm6_tunnel __rcu *next;
1374 void xfrm_init(void);
1375 void xfrm4_init(void);
1376 int xfrm_state_init(struct net *net);
1377 void xfrm_state_fini(struct net *net);
1378 void xfrm4_state_init(void);
1380 int xfrm6_init(void);
1381 void xfrm6_fini(void);
1382 int xfrm6_state_init(void);
1383 void xfrm6_state_fini(void);
1385 static inline int xfrm6_init(void)
1389 static inline void xfrm6_fini(void)
1395 #ifdef CONFIG_XFRM_STATISTICS
1396 int xfrm_proc_init(struct net *net);
1397 void xfrm_proc_fini(struct net *net);
1400 int xfrm_sysctl_init(struct net *net);
1401 #ifdef CONFIG_SYSCTL
1402 void xfrm_sysctl_fini(struct net *net);
1404 static inline void xfrm_sysctl_fini(struct net *net)
1409 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto);
1410 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1411 int (*func)(struct xfrm_state *, int, void*), void *);
1412 void xfrm_state_walk_done(struct xfrm_state_walk *walk);
1413 struct xfrm_state *xfrm_state_alloc(struct net *net);
1414 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1415 const xfrm_address_t *saddr,
1416 const struct flowi *fl,
1417 struct xfrm_tmpl *tmpl,
1418 struct xfrm_policy *pol, int *err,
1419 unsigned short family);
1420 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1421 xfrm_address_t *daddr,
1422 xfrm_address_t *saddr,
1423 unsigned short family,
1424 u8 mode, u8 proto, u32 reqid);
1425 int xfrm_state_check_expire(struct xfrm_state *x);
1426 void xfrm_state_insert(struct xfrm_state *x);
1427 int xfrm_state_add(struct xfrm_state *x);
1428 int xfrm_state_update(struct xfrm_state *x);
1429 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1430 const xfrm_address_t *daddr, __be32 spi,
1431 u8 proto, unsigned short family);
1432 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1433 const xfrm_address_t *daddr,
1434 const xfrm_address_t *saddr,
1436 unsigned short family);
1437 #ifdef CONFIG_XFRM_SUB_POLICY
1438 int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1439 unsigned short family);
1440 int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1441 unsigned short family);
1443 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1444 int n, unsigned short family)
1449 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1450 int n, unsigned short family)
1456 struct xfrmk_sadinfo {
1457 u32 sadhcnt; /* current hash bkts */
1458 u32 sadhmcnt; /* max allowed hash bkts */
1459 u32 sadcnt; /* current running count */
1462 struct xfrmk_spdinfo {
1473 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1474 int xfrm_state_delete(struct xfrm_state *x);
1475 int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info);
1476 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1477 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1478 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1479 int xfrm_init_replay(struct xfrm_state *x);
1480 int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1481 int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
1482 int xfrm_init_state(struct xfrm_state *x);
1483 int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1484 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1485 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1486 int xfrm_output_resume(struct sk_buff *skb, int err);
1487 int xfrm_output(struct sk_buff *skb);
1488 int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1489 void xfrm_local_error(struct sk_buff *skb, int mtu);
1490 int xfrm4_extract_header(struct sk_buff *skb);
1491 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1492 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1494 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1495 int xfrm4_rcv(struct sk_buff *skb);
1497 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1499 return xfrm4_rcv_encap(skb, nexthdr, spi, 0);
1502 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1503 int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1504 int xfrm4_output(struct sk_buff *skb);
1505 int xfrm4_output_finish(struct sk_buff *skb);
1506 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1507 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1508 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1509 int xfrm4_mode_tunnel_input_register(struct xfrm_tunnel_notifier *handler);
1510 int xfrm4_mode_tunnel_input_deregister(struct xfrm_tunnel_notifier *handler);
1511 int xfrm6_mode_tunnel_input_register(struct xfrm_tunnel_notifier *handler);
1512 int xfrm6_mode_tunnel_input_deregister(struct xfrm_tunnel_notifier *handler);
1513 int xfrm6_extract_header(struct sk_buff *skb);
1514 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1515 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi);
1516 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1517 int xfrm6_rcv(struct sk_buff *skb);
1518 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1519 xfrm_address_t *saddr, u8 proto);
1520 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1521 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1522 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1523 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1524 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1525 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1526 int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1527 int xfrm6_output(struct sk_buff *skb);
1528 int xfrm6_output_finish(struct sk_buff *skb);
1529 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1533 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1534 int xfrm_user_policy(struct sock *sk, int optname,
1535 u8 __user *optval, int optlen);
1537 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1539 return -ENOPROTOOPT;
1542 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1544 /* should not happen */
1550 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1552 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1553 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1554 int (*func)(struct xfrm_policy *, int, int, void*),
1556 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk);
1557 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1558 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1560 struct xfrm_selector *sel,
1561 struct xfrm_sec_ctx *ctx, int delete,
1563 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir,
1564 u32 id, int delete, int *err);
1565 int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info);
1566 u32 xfrm_get_acqseq(void);
1567 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1568 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1569 u8 mode, u32 reqid, u8 proto,
1570 const xfrm_address_t *daddr,
1571 const xfrm_address_t *saddr, int create,
1572 unsigned short family);
1573 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1575 #ifdef CONFIG_XFRM_MIGRATE
1576 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1577 const struct xfrm_migrate *m, int num_bundles,
1578 const struct xfrm_kmaddress *k);
1579 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m);
1580 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1581 struct xfrm_migrate *m);
1582 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1583 struct xfrm_migrate *m, int num_bundles,
1584 struct xfrm_kmaddress *k);
1587 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1588 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1589 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1590 xfrm_address_t *addr);
1592 void xfrm_input_init(void);
1593 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1595 void xfrm_probe_algs(void);
1596 int xfrm_count_pfkey_auth_supported(void);
1597 int xfrm_count_pfkey_enc_supported(void);
1598 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1599 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1600 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1601 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1602 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1603 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1604 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1605 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1606 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1609 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1610 const xfrm_address_t *b)
1612 return ipv6_addr_equal((const struct in6_addr *)a,
1613 (const struct in6_addr *)b);
1616 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1617 const xfrm_address_t *b,
1623 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1625 return xfrm6_addr_equal(a, b);
1629 static inline int xfrm_policy_id2dir(u32 index)
1635 static inline int xfrm_aevent_is_on(struct net *net)
1641 nlsk = rcu_dereference(net->xfrm.nlsk);
1643 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1649 static inline int xfrm_alg_len(const struct xfrm_algo *alg)
1651 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1654 static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1656 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1659 static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1661 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1664 #ifdef CONFIG_XFRM_MIGRATE
1665 static inline int xfrm_replay_clone(struct xfrm_state *x,
1666 struct xfrm_state *orig)
1668 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1673 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1674 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1676 x->preplay_esn = kmemdup(x->replay_esn,
1677 xfrm_replay_state_esn_len(x->replay_esn),
1679 if (!x->preplay_esn) {
1680 kfree(x->replay_esn);
1687 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1689 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1692 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1694 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1697 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1700 for (i = 0; i < n; i++)
1701 xfrm_state_put(*(states + i));
1704 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1707 for (i = 0; i < n; i++)
1708 xfrm_state_delete(*(states + i));
1713 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1715 return skb->sp->xvec[skb->sp->len - 1];
1719 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1721 if (attrs[XFRMA_MARK])
1722 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1729 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1734 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1738 #endif /* _NET_XFRM_H */