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;
167 struct xfrm_lifetime_cfg lft;
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;
175 /* Data for encapsulator */
176 struct xfrm_encap_tmpl *encap;
178 /* Data for care-of address */
179 xfrm_address_t *coaddr;
181 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
182 struct xfrm_state *tunnel;
184 /* If a tunnel, number of users + 1 */
185 atomic_t tunnel_users;
187 /* State for replay detection */
188 struct xfrm_replay_state replay;
189 struct xfrm_replay_state_esn *replay_esn;
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;
195 /* The functions for replay detection. */
196 struct xfrm_replay *repl;
198 /* internal flag that only holds state for delayed aevent at the
203 /* Replay detection notification settings */
207 /* Replay detection notification timer */
208 struct timer_list rtimer;
211 struct xfrm_stats stats;
213 struct xfrm_lifetime_cur curlft;
214 struct tasklet_hrtimer mtimer;
216 /* used to fix curlft->add_time when changing date */
220 unsigned long lastused;
222 /* Reference to data common to all the instances of this
224 const struct xfrm_type *type;
225 struct xfrm_mode *inner_mode;
226 struct xfrm_mode *inner_mode_iaf;
227 struct xfrm_mode *outer_mode;
229 /* Security context */
230 struct xfrm_sec_ctx *security;
232 /* Private data of this transformer, format is opaque,
233 * interpreted by xfrm_type methods. */
237 static inline struct net *xs_net(struct xfrm_state *x)
239 return read_pnet(&x->xs_net);
242 /* xflags - make enum if more show up */
243 #define XFRM_TIME_DEFER 1
244 #define XFRM_SOFT_EXPIRE 2
255 /* callback structure passed from either netlink or pfkey */
272 void (*advance)(struct xfrm_state *x, __be32 net_seq);
273 int (*check)(struct xfrm_state *x,
276 int (*recheck)(struct xfrm_state *x,
279 void (*notify)(struct xfrm_state *x, int event);
280 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
286 struct xfrm_policy_afinfo {
287 unsigned short family;
288 struct dst_ops *dst_ops;
289 void (*garbage_collect)(struct net *net);
290 struct dst_entry *(*dst_lookup)(struct net *net, int tos,
291 const xfrm_address_t *saddr,
292 const xfrm_address_t *daddr);
293 int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr);
294 void (*decode_session)(struct sk_buff *skb,
297 int (*get_tos)(const struct flowi *fl);
298 void (*init_dst)(struct net *net,
299 struct xfrm_dst *dst);
300 int (*init_path)(struct xfrm_dst *path,
301 struct dst_entry *dst,
303 int (*fill_dst)(struct xfrm_dst *xdst,
304 struct net_device *dev,
305 const struct flowi *fl);
306 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
309 extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
310 extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
311 extern void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c);
312 extern void km_state_notify(struct xfrm_state *x, const struct km_event *c);
315 extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
316 extern void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
317 extern int __xfrm_state_delete(struct xfrm_state *x);
319 struct xfrm_state_afinfo {
323 struct module *owner;
324 const struct xfrm_type *type_map[IPPROTO_MAX];
325 struct xfrm_mode *mode_map[XFRM_MODE_MAX];
326 int (*init_flags)(struct xfrm_state *x);
327 void (*init_tempsel)(struct xfrm_selector *sel,
328 const struct flowi *fl);
329 void (*init_temprop)(struct xfrm_state *x,
330 const struct xfrm_tmpl *tmpl,
331 const xfrm_address_t *daddr,
332 const xfrm_address_t *saddr);
333 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
334 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
335 int (*output)(struct sk_buff *skb);
336 int (*output_finish)(struct sk_buff *skb);
337 int (*extract_input)(struct xfrm_state *x,
338 struct sk_buff *skb);
339 int (*extract_output)(struct xfrm_state *x,
340 struct sk_buff *skb);
341 int (*transport_finish)(struct sk_buff *skb,
345 extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
346 extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
348 extern void xfrm_state_delete_tunnel(struct xfrm_state *x);
352 struct module *owner;
355 #define XFRM_TYPE_NON_FRAGMENT 1
356 #define XFRM_TYPE_REPLAY_PROT 2
357 #define XFRM_TYPE_LOCAL_COADDR 4
358 #define XFRM_TYPE_REMOTE_COADDR 8
360 int (*init_state)(struct xfrm_state *x);
361 void (*destructor)(struct xfrm_state *);
362 int (*input)(struct xfrm_state *, struct sk_buff *skb);
363 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
364 int (*reject)(struct xfrm_state *, struct sk_buff *,
365 const struct flowi *);
366 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
367 /* Estimate maximal size of result of transformation of a dgram */
368 u32 (*get_mtu)(struct xfrm_state *, int size);
371 extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
372 extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
376 * Remove encapsulation header.
378 * The IP header will be moved over the top of the encapsulation
381 * On entry, the transport header shall point to where the IP header
382 * should be and the network header shall be set to where the IP
383 * header currently is. skb->data shall point to the start of the
386 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
389 * This is the actual input entry point.
391 * For transport mode and equivalent this would be identical to
392 * input2 (which does not need to be set). While tunnel mode
393 * and equivalent would set this to the tunnel encapsulation function
394 * xfrm4_prepare_input that would in turn call input2.
396 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
399 * Add encapsulation header.
401 * On exit, the transport header will be set to the start of the
402 * encapsulation header to be filled in by x->type->output and
403 * the mac header will be set to the nextheader (protocol for
404 * IPv4) field of the extension header directly preceding the
405 * encapsulation header, or in its absence, that of the top IP
406 * header. The value of the network header will always point
407 * to the top IP header while skb->data will point to the payload.
409 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
412 * This is the actual output entry point.
414 * For transport mode and equivalent this would be identical to
415 * output2 (which does not need to be set). While tunnel mode
416 * and equivalent would set this to a tunnel encapsulation function
417 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
420 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
422 struct xfrm_state_afinfo *afinfo;
423 struct module *owner;
428 /* Flags for xfrm_mode. */
430 XFRM_MODE_FLAG_TUNNEL = 1,
433 extern int xfrm_register_mode(struct xfrm_mode *mode, int family);
434 extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
436 static inline int xfrm_af2proto(unsigned int family)
448 static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
450 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
451 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
452 return x->inner_mode;
454 return x->inner_mode_iaf;
458 /* id in template is interpreted as:
459 * daddr - destination of tunnel, may be zero for transport mode.
460 * spi - zero to acquire spi. Not zero if spi is static, then
461 * daddr must be fixed too.
462 * proto - AH/ESP/IPCOMP
466 /* Source address of tunnel. Ignored, if it is not a tunnel. */
467 xfrm_address_t saddr;
469 unsigned short encap_family;
473 /* Mode: transport, tunnel etc. */
476 /* Sharing mode: unique, this session only, this user only etc. */
479 /* May skip this transfomration if no SA is found */
482 /* Skip aalgos/ealgos/calgos checks. */
485 /* Bit mask of algos allowed for acquisition */
491 #define XFRM_MAX_DEPTH 6
493 struct xfrm_policy_walk_entry {
494 struct list_head all;
498 struct xfrm_policy_walk {
499 struct xfrm_policy_walk_entry walk;
508 struct hlist_node bydst;
509 struct hlist_node byidx;
511 /* This lock only affects elements except for entry. */
514 struct timer_list timer;
516 struct flow_cache_object flo;
520 struct xfrm_mark mark;
521 struct xfrm_selector selector;
522 struct xfrm_lifetime_cfg lft;
523 struct xfrm_lifetime_cur curlft;
524 struct xfrm_policy_walk_entry walk;
530 struct xfrm_sec_ctx *security;
531 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
534 static inline struct net *xp_net(const struct xfrm_policy *xp)
536 return read_pnet(&xp->xp_net);
539 struct xfrm_kmaddress {
540 xfrm_address_t local;
541 xfrm_address_t remote;
546 struct xfrm_migrate {
547 xfrm_address_t old_daddr;
548 xfrm_address_t old_saddr;
549 xfrm_address_t new_daddr;
550 xfrm_address_t new_saddr;
559 #define XFRM_KM_TIMEOUT 30
561 #define XFRM_REPLAY_SEQ 1
562 #define XFRM_REPLAY_OSEQ 2
563 #define XFRM_REPLAY_SEQ_MASK 3
565 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
566 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
568 /* default aevent timeout in units of 100ms */
569 #define XFRM_AE_ETIME 10
570 /* Async Event timer multiplier */
571 #define XFRM_AE_ETH_M 10
572 /* default seq threshold size */
573 #define XFRM_AE_SEQT_SIZE 2
576 struct list_head list;
578 int (*notify)(struct xfrm_state *x, const struct km_event *c);
579 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
580 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
581 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
582 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
583 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
584 int (*migrate)(const struct xfrm_selector *sel,
586 const struct xfrm_migrate *m,
588 const struct xfrm_kmaddress *k);
591 extern int xfrm_register_km(struct xfrm_mgr *km);
592 extern int xfrm_unregister_km(struct xfrm_mgr *km);
595 * This structure is used for the duration where packets are being
596 * transformed by IPsec. As soon as the packet leaves IPsec the
597 * area beyond the generic IP part may be overwritten.
601 struct inet_skb_parm h4;
602 struct inet6_skb_parm h6;
605 /* Sequence number for replay protection. */
618 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
621 * This structure is used by the afinfo prepare_input/prepare_output functions
622 * to transmit header information to the mode input/output functions.
624 struct xfrm_mode_skb_cb {
626 struct inet_skb_parm h4;
627 struct inet6_skb_parm h6;
630 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
634 /* IP header length (excluding options or extension headers). */
637 /* TOS for IPv4, class for IPv6. */
640 /* TTL for IPv4, hop limitfor IPv6. */
643 /* Protocol for IPv4, NH for IPv6. */
646 /* Option length for IPv4, zero for IPv6. */
649 /* Used by IPv6 only, zero for IPv4. */
653 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
656 * This structure is used by the input processing to locate the SPI and
657 * related information.
659 struct xfrm_spi_skb_cb {
661 struct inet_skb_parm h4;
662 struct inet6_skb_parm h6;
665 unsigned int daddroff;
669 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
671 /* Audit Information */
678 #ifdef CONFIG_AUDITSYSCALL
679 static inline struct audit_buffer *xfrm_audit_start(const char *op)
681 struct audit_buffer *audit_buf = NULL;
683 if (audit_enabled == 0)
685 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
686 AUDIT_MAC_IPSEC_EVENT);
687 if (audit_buf == NULL)
689 audit_log_format(audit_buf, "op=%s", op);
693 static inline void xfrm_audit_helper_usrinfo(kuid_t auid, u32 ses, u32 secid,
694 struct audit_buffer *audit_buf)
699 audit_log_format(audit_buf, " auid=%u ses=%u",
700 from_kuid(&init_user_ns, auid), ses);
702 security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) {
703 audit_log_format(audit_buf, " subj=%s", secctx);
704 security_release_secctx(secctx, secctx_len);
706 audit_log_task_context(audit_buf);
709 extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
710 kuid_t auid, u32 ses, u32 secid);
711 extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
712 kuid_t auid, u32 ses, u32 secid);
713 extern void xfrm_audit_state_add(struct xfrm_state *x, int result,
714 kuid_t auid, u32 ses, u32 secid);
715 extern void xfrm_audit_state_delete(struct xfrm_state *x, int result,
716 kuid_t auid, u32 ses, u32 secid);
717 extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
718 struct sk_buff *skb);
719 extern void xfrm_audit_state_replay(struct xfrm_state *x,
720 struct sk_buff *skb, __be32 net_seq);
721 extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
722 extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
723 __be32 net_spi, __be32 net_seq);
724 extern void xfrm_audit_state_icvfail(struct xfrm_state *x,
725 struct sk_buff *skb, u8 proto);
728 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
729 kuid_t auid, u32 ses, u32 secid)
733 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
734 kuid_t auid, u32 ses, u32 secid)
738 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
739 kuid_t auid, u32 ses, u32 secid)
743 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
744 kuid_t auid, u32 ses, u32 secid)
748 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
753 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
754 struct sk_buff *skb, __be32 net_seq)
758 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
763 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
764 __be32 net_spi, __be32 net_seq)
768 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
769 struct sk_buff *skb, u8 proto)
772 #endif /* CONFIG_AUDITSYSCALL */
774 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
776 if (likely(policy != NULL))
777 atomic_inc(&policy->refcnt);
780 extern void xfrm_policy_destroy(struct xfrm_policy *policy);
782 static inline void xfrm_pol_put(struct xfrm_policy *policy)
784 if (atomic_dec_and_test(&policy->refcnt))
785 xfrm_policy_destroy(policy);
788 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
791 for (i = npols - 1; i >= 0; --i)
792 xfrm_pol_put(pols[i]);
795 extern void __xfrm_state_destroy(struct xfrm_state *);
797 static inline void __xfrm_state_put(struct xfrm_state *x)
799 atomic_dec(&x->refcnt);
802 static inline void xfrm_state_put(struct xfrm_state *x)
804 if (atomic_dec_and_test(&x->refcnt))
805 __xfrm_state_destroy(x);
808 static inline void xfrm_state_hold(struct xfrm_state *x)
810 atomic_inc(&x->refcnt);
813 static inline bool addr_match(const void *token1, const void *token2,
816 const __be32 *a1 = token1;
817 const __be32 *a2 = token2;
821 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
822 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
825 if (memcmp(a1, a2, pdw << 2))
831 mask = htonl((0xffffffff) << (32 - pbi));
833 if ((a1[pdw] ^ a2[pdw]) & mask)
840 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
842 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
845 return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen)));
849 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
852 switch(fl->flowi_proto) {
855 case IPPROTO_UDPLITE:
857 port = uli->ports.sport;
861 port = htons(uli->icmpt.type);
864 port = htons(uli->mht.type);
867 port = htons(ntohl(uli->gre_key) >> 16);
876 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
879 switch(fl->flowi_proto) {
882 case IPPROTO_UDPLITE:
884 port = uli->ports.dport;
888 port = htons(uli->icmpt.code);
891 port = htons(ntohl(uli->gre_key) & 0xffff);
899 extern bool xfrm_selector_match(const struct xfrm_selector *sel,
900 const struct flowi *fl,
901 unsigned short family);
903 #ifdef CONFIG_SECURITY_NETWORK_XFRM
904 /* If neither has a context --> match
905 * Otherwise, both must have a context and the sids, doi, alg must match
907 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
909 return ((!s1 && !s2) ||
911 (s1->ctx_sid == s2->ctx_sid) &&
912 (s1->ctx_doi == s2->ctx_doi) &&
913 (s1->ctx_alg == s2->ctx_alg)));
916 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
922 /* A struct encoding bundle of transformations to apply to some set of flow.
924 * dst->child points to the next element of bundle.
925 * dst->xfrm points to an instanse of transformer.
927 * Due to unfortunate limitations of current routing cache, which we
928 * have no time to fix, it mirrors struct rtable and bound to the same
929 * routing key, including saddr,daddr. However, we can have many of
930 * bundles differing by session id. All the bundles grow from a parent
935 struct dst_entry dst;
939 struct dst_entry *route;
940 struct flow_cache_object flo;
941 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
942 int num_pols, num_xfrms;
943 #ifdef CONFIG_XFRM_SUB_POLICY
944 struct flowi *origin;
945 struct xfrm_selector *partner;
949 u32 route_mtu_cached;
950 u32 child_mtu_cached;
956 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
958 xfrm_pols_put(xdst->pols, xdst->num_pols);
959 dst_release(xdst->route);
960 if (likely(xdst->u.dst.xfrm))
961 xfrm_state_put(xdst->u.dst.xfrm);
962 #ifdef CONFIG_XFRM_SUB_POLICY
965 kfree(xdst->partner);
966 xdst->partner = NULL;
971 extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
976 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
979 static inline int secpath_exists(struct sk_buff *skb)
982 return skb->sp != NULL;
988 static inline struct sec_path *
989 secpath_get(struct sec_path *sp)
992 atomic_inc(&sp->refcnt);
996 extern void __secpath_destroy(struct sec_path *sp);
999 secpath_put(struct sec_path *sp)
1001 if (sp && atomic_dec_and_test(&sp->refcnt))
1002 __secpath_destroy(sp);
1005 extern struct sec_path *secpath_dup(struct sec_path *src);
1008 secpath_reset(struct sk_buff *skb)
1011 secpath_put(skb->sp);
1017 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1021 return addr->a4 == 0;
1023 return ipv6_addr_any((struct in6_addr *)&addr->a6);
1029 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1031 return (tmpl->saddr.a4 &&
1032 tmpl->saddr.a4 != x->props.saddr.a4);
1036 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1038 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1039 ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1043 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1047 return __xfrm4_state_addr_cmp(tmpl, x);
1049 return __xfrm6_state_addr_cmp(tmpl, x);
1055 extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family);
1057 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1058 struct sk_buff *skb,
1059 unsigned int family, int reverse)
1061 struct net *net = dev_net(skb->dev);
1062 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1064 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1065 return __xfrm_policy_check(sk, ndir, skb, family);
1067 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
1068 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1069 __xfrm_policy_check(sk, ndir, skb, family);
1072 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1074 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1077 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1079 return xfrm_policy_check(sk, dir, skb, AF_INET);
1082 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1084 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1087 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1088 struct sk_buff *skb)
1090 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1093 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1094 struct sk_buff *skb)
1096 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1099 extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1100 unsigned int family, int reverse);
1102 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1103 unsigned int family)
1105 return __xfrm_decode_session(skb, fl, family, 0);
1108 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1110 unsigned int family)
1112 return __xfrm_decode_session(skb, fl, family, 1);
1115 extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1117 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1119 struct net *net = dev_net(skb->dev);
1121 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1122 (skb_dst(skb)->flags & DST_NOXFRM) ||
1123 __xfrm_route_forward(skb, family);
1126 static inline int xfrm4_route_forward(struct sk_buff *skb)
1128 return xfrm_route_forward(skb, AF_INET);
1131 static inline int xfrm6_route_forward(struct sk_buff *skb)
1133 return xfrm_route_forward(skb, AF_INET6);
1136 extern int __xfrm_sk_clone_policy(struct sock *sk);
1138 static inline int xfrm_sk_clone_policy(struct sock *sk)
1140 if (unlikely(sk->sk_policy[0] || sk->sk_policy[1]))
1141 return __xfrm_sk_clone_policy(sk);
1145 extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1147 static inline void xfrm_sk_free_policy(struct sock *sk)
1149 if (unlikely(sk->sk_policy[0] != NULL)) {
1150 xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX);
1151 sk->sk_policy[0] = NULL;
1153 if (unlikely(sk->sk_policy[1] != NULL)) {
1154 xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1);
1155 sk->sk_policy[1] = NULL;
1161 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1162 static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; }
1163 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1164 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1165 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1169 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1173 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1177 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1179 unsigned int family)
1183 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1184 struct sk_buff *skb)
1188 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1189 struct sk_buff *skb)
1196 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1200 return (xfrm_address_t *)&fl->u.ip4.daddr;
1202 return (xfrm_address_t *)&fl->u.ip6.daddr;
1208 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1212 return (xfrm_address_t *)&fl->u.ip4.saddr;
1214 return (xfrm_address_t *)&fl->u.ip6.saddr;
1220 void xfrm_flowi_addr_get(const struct flowi *fl,
1221 xfrm_address_t *saddr, xfrm_address_t *daddr,
1222 unsigned short family)
1226 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1227 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1230 *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr;
1231 *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr;
1236 static __inline__ int
1237 __xfrm4_state_addr_check(const struct xfrm_state *x,
1238 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1240 if (daddr->a4 == x->id.daddr.a4 &&
1241 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1246 static __inline__ int
1247 __xfrm6_state_addr_check(const struct xfrm_state *x,
1248 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1250 if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1251 (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)||
1252 ipv6_addr_any((struct in6_addr *)saddr) ||
1253 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1258 static __inline__ int
1259 xfrm_state_addr_check(const struct xfrm_state *x,
1260 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1261 unsigned short family)
1265 return __xfrm4_state_addr_check(x, daddr, saddr);
1267 return __xfrm6_state_addr_check(x, daddr, saddr);
1272 static __inline__ int
1273 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1274 unsigned short family)
1278 return __xfrm4_state_addr_check(x,
1279 (const xfrm_address_t *)&fl->u.ip4.daddr,
1280 (const xfrm_address_t *)&fl->u.ip4.saddr);
1282 return __xfrm6_state_addr_check(x,
1283 (const xfrm_address_t *)&fl->u.ip6.daddr,
1284 (const xfrm_address_t *)&fl->u.ip6.saddr);
1289 static inline int xfrm_state_kern(const struct xfrm_state *x)
1291 return atomic_read(&x->tunnel_users);
1294 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1296 return (!userproto || proto == userproto ||
1297 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1298 proto == IPPROTO_ESP ||
1299 proto == IPPROTO_COMP)));
1303 * xfrm algorithm information
1305 struct xfrm_algo_aead_info {
1309 struct xfrm_algo_auth_info {
1314 struct xfrm_algo_encr_info {
1319 struct xfrm_algo_comp_info {
1323 struct xfrm_algo_desc {
1328 struct xfrm_algo_aead_info aead;
1329 struct xfrm_algo_auth_info auth;
1330 struct xfrm_algo_encr_info encr;
1331 struct xfrm_algo_comp_info comp;
1333 struct sadb_alg desc;
1336 /* XFRM tunnel handlers. */
1337 struct xfrm_tunnel {
1338 int (*handler)(struct sk_buff *skb);
1339 int (*err_handler)(struct sk_buff *skb, u32 info);
1341 struct xfrm_tunnel __rcu *next;
1345 struct xfrm6_tunnel {
1346 int (*handler)(struct sk_buff *skb);
1347 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1348 u8 type, u8 code, int offset, __be32 info);
1349 struct xfrm6_tunnel __rcu *next;
1353 extern void xfrm_init(void);
1354 extern void xfrm4_init(void);
1355 extern int xfrm_state_init(struct net *net);
1356 extern void xfrm_state_fini(struct net *net);
1357 extern void xfrm4_state_init(void);
1359 extern int xfrm6_init(void);
1360 extern void xfrm6_fini(void);
1361 extern int xfrm6_state_init(void);
1362 extern void xfrm6_state_fini(void);
1364 static inline int xfrm6_init(void)
1368 static inline void xfrm6_fini(void)
1374 #ifdef CONFIG_XFRM_STATISTICS
1375 extern int xfrm_proc_init(struct net *net);
1376 extern void xfrm_proc_fini(struct net *net);
1379 extern int xfrm_sysctl_init(struct net *net);
1380 #ifdef CONFIG_SYSCTL
1381 extern void xfrm_sysctl_fini(struct net *net);
1383 static inline void xfrm_sysctl_fini(struct net *net)
1388 extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto);
1389 extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1390 int (*func)(struct xfrm_state *, int, void*), void *);
1391 extern void xfrm_state_walk_done(struct xfrm_state_walk *walk);
1392 extern struct xfrm_state *xfrm_state_alloc(struct net *net);
1393 extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1394 const xfrm_address_t *saddr,
1395 const struct flowi *fl,
1396 struct xfrm_tmpl *tmpl,
1397 struct xfrm_policy *pol, int *err,
1398 unsigned short family);
1399 extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1400 xfrm_address_t *daddr,
1401 xfrm_address_t *saddr,
1402 unsigned short family,
1403 u8 mode, u8 proto, u32 reqid);
1404 extern int xfrm_state_check_expire(struct xfrm_state *x);
1405 extern void xfrm_state_insert(struct xfrm_state *x);
1406 extern int xfrm_state_add(struct xfrm_state *x);
1407 extern int xfrm_state_update(struct xfrm_state *x);
1408 extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1409 const xfrm_address_t *daddr, __be32 spi,
1410 u8 proto, unsigned short family);
1411 extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1412 const xfrm_address_t *daddr,
1413 const xfrm_address_t *saddr,
1415 unsigned short family);
1416 #ifdef CONFIG_XFRM_SUB_POLICY
1417 extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1418 int n, unsigned short family);
1419 extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1420 int n, unsigned short family);
1422 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1423 int n, unsigned short family)
1428 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1429 int n, unsigned short family)
1435 struct xfrmk_sadinfo {
1436 u32 sadhcnt; /* current hash bkts */
1437 u32 sadhmcnt; /* max allowed hash bkts */
1438 u32 sadcnt; /* current running count */
1441 struct xfrmk_spdinfo {
1452 extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark,
1454 extern int xfrm_state_delete(struct xfrm_state *x);
1455 extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info);
1456 extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1457 extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1458 extern u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1459 extern int xfrm_init_replay(struct xfrm_state *x);
1460 extern int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1461 extern int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
1462 extern int xfrm_init_state(struct xfrm_state *x);
1463 extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1464 extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi,
1466 extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1467 extern int xfrm_output_resume(struct sk_buff *skb, int err);
1468 extern int xfrm_output(struct sk_buff *skb);
1469 extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1470 extern int xfrm4_extract_header(struct sk_buff *skb);
1471 extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1472 extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1474 extern int xfrm4_transport_finish(struct sk_buff *skb, int async);
1475 extern int xfrm4_rcv(struct sk_buff *skb);
1477 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1479 return xfrm4_rcv_encap(skb, nexthdr, spi, 0);
1482 extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1483 extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1484 extern int xfrm4_output(struct sk_buff *skb);
1485 extern int xfrm4_output_finish(struct sk_buff *skb);
1486 extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1487 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1488 extern int xfrm4_mode_tunnel_input_register(struct xfrm_tunnel *handler);
1489 extern int xfrm4_mode_tunnel_input_deregister(struct xfrm_tunnel *handler);
1490 extern int xfrm6_extract_header(struct sk_buff *skb);
1491 extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1492 extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi);
1493 extern int xfrm6_transport_finish(struct sk_buff *skb, int async);
1494 extern int xfrm6_rcv(struct sk_buff *skb);
1495 extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1496 xfrm_address_t *saddr, u8 proto);
1497 extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1498 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1499 extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1500 extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1501 extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1502 extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1503 extern int xfrm6_output(struct sk_buff *skb);
1504 extern int xfrm6_output_finish(struct sk_buff *skb);
1505 extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1509 extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1510 extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen);
1512 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1514 return -ENOPROTOOPT;
1517 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1519 /* should not happen */
1525 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1527 extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1528 extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1529 int (*func)(struct xfrm_policy *, int, int, void*), void *);
1530 extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk);
1531 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1532 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1534 struct xfrm_selector *sel,
1535 struct xfrm_sec_ctx *ctx, int delete,
1537 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err);
1538 int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info);
1539 u32 xfrm_get_acqseq(void);
1540 extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1541 struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark,
1542 u8 mode, u32 reqid, u8 proto,
1543 const xfrm_address_t *daddr,
1544 const xfrm_address_t *saddr, int create,
1545 unsigned short family);
1546 extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1548 #ifdef CONFIG_XFRM_MIGRATE
1549 extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1550 const struct xfrm_migrate *m, int num_bundles,
1551 const struct xfrm_kmaddress *k);
1552 extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m);
1553 extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
1554 struct xfrm_migrate *m);
1555 extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1556 struct xfrm_migrate *m, int num_bundles,
1557 struct xfrm_kmaddress *k);
1560 extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1561 extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1562 extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
1564 extern void xfrm_input_init(void);
1565 extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1567 extern void xfrm_probe_algs(void);
1568 extern int xfrm_count_auth_supported(void);
1569 extern int xfrm_count_enc_supported(void);
1570 extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1571 extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1572 extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1573 extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1574 extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1575 extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1576 extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1577 extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1578 extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1581 static inline int xfrm_addr_cmp(const xfrm_address_t *a,
1582 const xfrm_address_t *b,
1588 return (__force u32)a->a4 - (__force u32)b->a4;
1590 return ipv6_addr_cmp((const struct in6_addr *)a,
1591 (const struct in6_addr *)b);
1595 static inline int xfrm_policy_id2dir(u32 index)
1601 static inline int xfrm_aevent_is_on(struct net *net)
1607 nlsk = rcu_dereference(net->xfrm.nlsk);
1609 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1615 static inline int xfrm_alg_len(const struct xfrm_algo *alg)
1617 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1620 static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1622 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1625 static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1627 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1630 #ifdef CONFIG_XFRM_MIGRATE
1631 static inline int xfrm_replay_clone(struct xfrm_state *x,
1632 struct xfrm_state *orig)
1634 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1639 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1640 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1642 x->preplay_esn = kmemdup(x->replay_esn,
1643 xfrm_replay_state_esn_len(x->replay_esn),
1645 if (!x->preplay_esn) {
1646 kfree(x->replay_esn);
1653 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1655 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1658 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1660 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1663 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1666 for (i = 0; i < n; i++)
1667 xfrm_state_put(*(states + i));
1670 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1673 for (i = 0; i < n; i++)
1674 xfrm_state_delete(*(states + i));
1679 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1681 return skb->sp->xvec[skb->sp->len - 1];
1685 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1687 if (attrs[XFRMA_MARK])
1688 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1695 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1700 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1704 #endif /* _NET_XFRM_H */