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 extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
311 extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
312 extern void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c);
313 extern void km_state_notify(struct xfrm_state *x, const struct km_event *c);
316 extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
317 extern void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
318 extern int __xfrm_state_delete(struct xfrm_state *x);
320 struct xfrm_state_afinfo {
324 struct module *owner;
325 const struct xfrm_type *type_map[IPPROTO_MAX];
326 struct xfrm_mode *mode_map[XFRM_MODE_MAX];
327 int (*init_flags)(struct xfrm_state *x);
328 void (*init_tempsel)(struct xfrm_selector *sel,
329 const struct flowi *fl);
330 void (*init_temprop)(struct xfrm_state *x,
331 const struct xfrm_tmpl *tmpl,
332 const xfrm_address_t *daddr,
333 const xfrm_address_t *saddr);
334 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
335 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
336 int (*output)(struct sk_buff *skb);
337 int (*output_finish)(struct sk_buff *skb);
338 int (*extract_input)(struct xfrm_state *x,
339 struct sk_buff *skb);
340 int (*extract_output)(struct xfrm_state *x,
341 struct sk_buff *skb);
342 int (*transport_finish)(struct sk_buff *skb,
344 void (*local_error)(struct sk_buff *skb, u32 mtu);
347 extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
348 extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
349 extern struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
350 extern void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
352 extern void xfrm_state_delete_tunnel(struct xfrm_state *x);
356 struct module *owner;
359 #define XFRM_TYPE_NON_FRAGMENT 1
360 #define XFRM_TYPE_REPLAY_PROT 2
361 #define XFRM_TYPE_LOCAL_COADDR 4
362 #define XFRM_TYPE_REMOTE_COADDR 8
364 int (*init_state)(struct xfrm_state *x);
365 void (*destructor)(struct xfrm_state *);
366 int (*input)(struct xfrm_state *, struct sk_buff *skb);
367 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
368 int (*reject)(struct xfrm_state *, struct sk_buff *,
369 const struct flowi *);
370 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
371 /* Estimate maximal size of result of transformation of a dgram */
372 u32 (*get_mtu)(struct xfrm_state *, int size);
375 extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
376 extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
380 * Remove encapsulation header.
382 * The IP header will be moved over the top of the encapsulation
385 * On entry, the transport header shall point to where the IP header
386 * should be and the network header shall be set to where the IP
387 * header currently is. skb->data shall point to the start of the
390 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
393 * This is the actual input entry point.
395 * For transport mode and equivalent this would be identical to
396 * input2 (which does not need to be set). While tunnel mode
397 * and equivalent would set this to the tunnel encapsulation function
398 * xfrm4_prepare_input that would in turn call input2.
400 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
403 * Add encapsulation header.
405 * On exit, the transport header will be set to the start of the
406 * encapsulation header to be filled in by x->type->output and
407 * the mac header will be set to the nextheader (protocol for
408 * IPv4) field of the extension header directly preceding the
409 * encapsulation header, or in its absence, that of the top IP
410 * header. The value of the network header will always point
411 * to the top IP header while skb->data will point to the payload.
413 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
416 * This is the actual output entry point.
418 * For transport mode and equivalent this would be identical to
419 * output2 (which does not need to be set). While tunnel mode
420 * and equivalent would set this to a tunnel encapsulation function
421 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
424 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
426 struct xfrm_state_afinfo *afinfo;
427 struct module *owner;
432 /* Flags for xfrm_mode. */
434 XFRM_MODE_FLAG_TUNNEL = 1,
437 extern int xfrm_register_mode(struct xfrm_mode *mode, int family);
438 extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
440 static inline int xfrm_af2proto(unsigned int family)
452 static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
454 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
455 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
456 return x->inner_mode;
458 return x->inner_mode_iaf;
462 /* id in template is interpreted as:
463 * daddr - destination of tunnel, may be zero for transport mode.
464 * spi - zero to acquire spi. Not zero if spi is static, then
465 * daddr must be fixed too.
466 * proto - AH/ESP/IPCOMP
470 /* Source address of tunnel. Ignored, if it is not a tunnel. */
471 xfrm_address_t saddr;
473 unsigned short encap_family;
477 /* Mode: transport, tunnel etc. */
480 /* Sharing mode: unique, this session only, this user only etc. */
483 /* May skip this transfomration if no SA is found */
486 /* Skip aalgos/ealgos/calgos checks. */
489 /* Bit mask of algos allowed for acquisition */
495 #define XFRM_MAX_DEPTH 6
497 struct xfrm_policy_walk_entry {
498 struct list_head all;
502 struct xfrm_policy_walk {
503 struct xfrm_policy_walk_entry walk;
508 struct xfrm_policy_queue {
509 struct sk_buff_head hold_queue;
510 struct timer_list hold_timer;
511 unsigned long timeout;
518 struct hlist_node bydst;
519 struct hlist_node byidx;
521 /* This lock only affects elements except for entry. */
524 struct timer_list timer;
526 struct flow_cache_object flo;
530 struct xfrm_mark mark;
531 struct xfrm_selector selector;
532 struct xfrm_lifetime_cfg lft;
533 struct xfrm_lifetime_cur curlft;
534 struct xfrm_policy_walk_entry walk;
535 struct xfrm_policy_queue polq;
541 struct xfrm_sec_ctx *security;
542 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
545 static inline struct net *xp_net(const struct xfrm_policy *xp)
547 return read_pnet(&xp->xp_net);
550 struct xfrm_kmaddress {
551 xfrm_address_t local;
552 xfrm_address_t remote;
557 struct xfrm_migrate {
558 xfrm_address_t old_daddr;
559 xfrm_address_t old_saddr;
560 xfrm_address_t new_daddr;
561 xfrm_address_t new_saddr;
570 #define XFRM_KM_TIMEOUT 30
572 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
573 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
575 /* default aevent timeout in units of 100ms */
576 #define XFRM_AE_ETIME 10
577 /* Async Event timer multiplier */
578 #define XFRM_AE_ETH_M 10
579 /* default seq threshold size */
580 #define XFRM_AE_SEQT_SIZE 2
583 struct list_head list;
585 int (*notify)(struct xfrm_state *x, const struct km_event *c);
586 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
587 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
588 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
589 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
590 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
591 int (*migrate)(const struct xfrm_selector *sel,
593 const struct xfrm_migrate *m,
595 const struct xfrm_kmaddress *k);
598 extern int xfrm_register_km(struct xfrm_mgr *km);
599 extern int xfrm_unregister_km(struct xfrm_mgr *km);
602 * This structure is used for the duration where packets are being
603 * transformed by IPsec. As soon as the packet leaves IPsec the
604 * area beyond the generic IP part may be overwritten.
608 struct inet_skb_parm h4;
609 struct inet6_skb_parm h6;
612 /* Sequence number for replay protection. */
625 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
628 * This structure is used by the afinfo prepare_input/prepare_output functions
629 * to transmit header information to the mode input/output functions.
631 struct xfrm_mode_skb_cb {
633 struct inet_skb_parm h4;
634 struct inet6_skb_parm h6;
637 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
641 /* IP header length (excluding options or extension headers). */
644 /* TOS for IPv4, class for IPv6. */
647 /* TTL for IPv4, hop limitfor IPv6. */
650 /* Protocol for IPv4, NH for IPv6. */
653 /* Option length for IPv4, zero for IPv6. */
656 /* Used by IPv6 only, zero for IPv4. */
660 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
663 * This structure is used by the input processing to locate the SPI and
664 * related information.
666 struct xfrm_spi_skb_cb {
668 struct inet_skb_parm h4;
669 struct inet6_skb_parm h6;
672 unsigned int daddroff;
676 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
678 /* Audit Information */
685 #ifdef CONFIG_AUDITSYSCALL
686 static inline struct audit_buffer *xfrm_audit_start(const char *op)
688 struct audit_buffer *audit_buf = NULL;
690 if (audit_enabled == 0)
692 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
693 AUDIT_MAC_IPSEC_EVENT);
694 if (audit_buf == NULL)
696 audit_log_format(audit_buf, "op=%s", op);
700 static inline void xfrm_audit_helper_usrinfo(kuid_t auid, u32 ses, u32 secid,
701 struct audit_buffer *audit_buf)
706 audit_log_format(audit_buf, " auid=%u ses=%u",
707 from_kuid(&init_user_ns, auid), ses);
709 security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) {
710 audit_log_format(audit_buf, " subj=%s", secctx);
711 security_release_secctx(secctx, secctx_len);
713 audit_log_task_context(audit_buf);
716 extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
717 kuid_t auid, u32 ses, u32 secid);
718 extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
719 kuid_t auid, u32 ses, u32 secid);
720 extern void xfrm_audit_state_add(struct xfrm_state *x, int result,
721 kuid_t auid, u32 ses, u32 secid);
722 extern void xfrm_audit_state_delete(struct xfrm_state *x, int result,
723 kuid_t auid, u32 ses, u32 secid);
724 extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
725 struct sk_buff *skb);
726 extern void xfrm_audit_state_replay(struct xfrm_state *x,
727 struct sk_buff *skb, __be32 net_seq);
728 extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
729 extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
730 __be32 net_spi, __be32 net_seq);
731 extern void xfrm_audit_state_icvfail(struct xfrm_state *x,
732 struct sk_buff *skb, u8 proto);
735 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
736 kuid_t auid, u32 ses, u32 secid)
740 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
741 kuid_t auid, u32 ses, u32 secid)
745 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
746 kuid_t auid, u32 ses, u32 secid)
750 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
751 kuid_t auid, u32 ses, u32 secid)
755 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
760 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
761 struct sk_buff *skb, __be32 net_seq)
765 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
770 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
771 __be32 net_spi, __be32 net_seq)
775 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
776 struct sk_buff *skb, u8 proto)
779 #endif /* CONFIG_AUDITSYSCALL */
781 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
783 if (likely(policy != NULL))
784 atomic_inc(&policy->refcnt);
787 extern void xfrm_policy_destroy(struct xfrm_policy *policy);
789 static inline void xfrm_pol_put(struct xfrm_policy *policy)
791 if (atomic_dec_and_test(&policy->refcnt))
792 xfrm_policy_destroy(policy);
795 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
798 for (i = npols - 1; i >= 0; --i)
799 xfrm_pol_put(pols[i]);
802 extern void __xfrm_state_destroy(struct xfrm_state *);
804 static inline void __xfrm_state_put(struct xfrm_state *x)
806 atomic_dec(&x->refcnt);
809 static inline void xfrm_state_put(struct xfrm_state *x)
811 if (atomic_dec_and_test(&x->refcnt))
812 __xfrm_state_destroy(x);
815 static inline void xfrm_state_hold(struct xfrm_state *x)
817 atomic_inc(&x->refcnt);
820 static inline bool addr_match(const void *token1, const void *token2,
823 const __be32 *a1 = token1;
824 const __be32 *a2 = token2;
828 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
829 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
832 if (memcmp(a1, a2, pdw << 2))
838 mask = htonl((0xffffffff) << (32 - pbi));
840 if ((a1[pdw] ^ a2[pdw]) & mask)
847 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
849 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
852 return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen)));
856 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
859 switch(fl->flowi_proto) {
862 case IPPROTO_UDPLITE:
864 port = uli->ports.sport;
868 port = htons(uli->icmpt.type);
871 port = htons(uli->mht.type);
874 port = htons(ntohl(uli->gre_key) >> 16);
883 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
886 switch(fl->flowi_proto) {
889 case IPPROTO_UDPLITE:
891 port = uli->ports.dport;
895 port = htons(uli->icmpt.code);
898 port = htons(ntohl(uli->gre_key) & 0xffff);
906 extern bool xfrm_selector_match(const struct xfrm_selector *sel,
907 const struct flowi *fl,
908 unsigned short family);
910 #ifdef CONFIG_SECURITY_NETWORK_XFRM
911 /* If neither has a context --> match
912 * Otherwise, both must have a context and the sids, doi, alg must match
914 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
916 return ((!s1 && !s2) ||
918 (s1->ctx_sid == s2->ctx_sid) &&
919 (s1->ctx_doi == s2->ctx_doi) &&
920 (s1->ctx_alg == s2->ctx_alg)));
923 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
929 /* A struct encoding bundle of transformations to apply to some set of flow.
931 * dst->child points to the next element of bundle.
932 * dst->xfrm points to an instanse of transformer.
934 * Due to unfortunate limitations of current routing cache, which we
935 * have no time to fix, it mirrors struct rtable and bound to the same
936 * routing key, including saddr,daddr. However, we can have many of
937 * bundles differing by session id. All the bundles grow from a parent
942 struct dst_entry dst;
946 struct dst_entry *route;
947 struct flow_cache_object flo;
948 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
949 int num_pols, num_xfrms;
950 #ifdef CONFIG_XFRM_SUB_POLICY
951 struct flowi *origin;
952 struct xfrm_selector *partner;
956 u32 route_mtu_cached;
957 u32 child_mtu_cached;
963 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
965 xfrm_pols_put(xdst->pols, xdst->num_pols);
966 dst_release(xdst->route);
967 if (likely(xdst->u.dst.xfrm))
968 xfrm_state_put(xdst->u.dst.xfrm);
969 #ifdef CONFIG_XFRM_SUB_POLICY
972 kfree(xdst->partner);
973 xdst->partner = NULL;
978 extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
983 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
986 static inline int secpath_exists(struct sk_buff *skb)
989 return skb->sp != NULL;
995 static inline struct sec_path *
996 secpath_get(struct sec_path *sp)
999 atomic_inc(&sp->refcnt);
1003 extern void __secpath_destroy(struct sec_path *sp);
1006 secpath_put(struct sec_path *sp)
1008 if (sp && atomic_dec_and_test(&sp->refcnt))
1009 __secpath_destroy(sp);
1012 extern struct sec_path *secpath_dup(struct sec_path *src);
1015 secpath_reset(struct sk_buff *skb)
1018 secpath_put(skb->sp);
1024 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1028 return addr->a4 == 0;
1030 return ipv6_addr_any((struct in6_addr *)&addr->a6);
1036 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1038 return (tmpl->saddr.a4 &&
1039 tmpl->saddr.a4 != x->props.saddr.a4);
1043 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1045 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1046 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1050 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1054 return __xfrm4_state_addr_cmp(tmpl, x);
1056 return __xfrm6_state_addr_cmp(tmpl, x);
1062 extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family);
1064 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1065 struct sk_buff *skb,
1066 unsigned int family, int reverse)
1068 struct net *net = dev_net(skb->dev);
1069 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1071 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1072 return __xfrm_policy_check(sk, ndir, skb, family);
1074 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
1075 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1076 __xfrm_policy_check(sk, ndir, skb, family);
1079 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1081 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1084 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1086 return xfrm_policy_check(sk, dir, skb, AF_INET);
1089 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1091 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1094 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1095 struct sk_buff *skb)
1097 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1100 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1101 struct sk_buff *skb)
1103 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1106 extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1107 unsigned int family, int reverse);
1109 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1110 unsigned int family)
1112 return __xfrm_decode_session(skb, fl, family, 0);
1115 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1117 unsigned int family)
1119 return __xfrm_decode_session(skb, fl, family, 1);
1122 extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1124 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1126 struct net *net = dev_net(skb->dev);
1128 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1129 (skb_dst(skb)->flags & DST_NOXFRM) ||
1130 __xfrm_route_forward(skb, family);
1133 static inline int xfrm4_route_forward(struct sk_buff *skb)
1135 return xfrm_route_forward(skb, AF_INET);
1138 static inline int xfrm6_route_forward(struct sk_buff *skb)
1140 return xfrm_route_forward(skb, AF_INET6);
1143 extern int __xfrm_sk_clone_policy(struct sock *sk);
1145 static inline int xfrm_sk_clone_policy(struct sock *sk)
1147 if (unlikely(sk->sk_policy[0] || sk->sk_policy[1]))
1148 return __xfrm_sk_clone_policy(sk);
1152 extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1154 static inline void xfrm_sk_free_policy(struct sock *sk)
1156 if (unlikely(sk->sk_policy[0] != NULL)) {
1157 xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX);
1158 sk->sk_policy[0] = NULL;
1160 if (unlikely(sk->sk_policy[1] != NULL)) {
1161 xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1);
1162 sk->sk_policy[1] = NULL;
1166 extern void xfrm_garbage_collect(struct net *net);
1170 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1171 static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; }
1172 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1173 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1174 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1178 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1182 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1186 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1188 unsigned int family)
1192 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1193 struct sk_buff *skb)
1197 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1198 struct sk_buff *skb)
1202 static inline void xfrm_garbage_collect(struct net *net)
1208 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1212 return (xfrm_address_t *)&fl->u.ip4.daddr;
1214 return (xfrm_address_t *)&fl->u.ip6.daddr;
1220 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1224 return (xfrm_address_t *)&fl->u.ip4.saddr;
1226 return (xfrm_address_t *)&fl->u.ip6.saddr;
1232 void xfrm_flowi_addr_get(const struct flowi *fl,
1233 xfrm_address_t *saddr, xfrm_address_t *daddr,
1234 unsigned short family)
1238 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1239 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1242 *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr;
1243 *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr;
1248 static __inline__ int
1249 __xfrm4_state_addr_check(const struct xfrm_state *x,
1250 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1252 if (daddr->a4 == x->id.daddr.a4 &&
1253 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1258 static __inline__ int
1259 __xfrm6_state_addr_check(const struct xfrm_state *x,
1260 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1262 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1263 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1264 ipv6_addr_any((struct in6_addr *)saddr) ||
1265 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1270 static __inline__ int
1271 xfrm_state_addr_check(const struct xfrm_state *x,
1272 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1273 unsigned short family)
1277 return __xfrm4_state_addr_check(x, daddr, saddr);
1279 return __xfrm6_state_addr_check(x, daddr, saddr);
1284 static __inline__ int
1285 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1286 unsigned short family)
1290 return __xfrm4_state_addr_check(x,
1291 (const xfrm_address_t *)&fl->u.ip4.daddr,
1292 (const xfrm_address_t *)&fl->u.ip4.saddr);
1294 return __xfrm6_state_addr_check(x,
1295 (const xfrm_address_t *)&fl->u.ip6.daddr,
1296 (const xfrm_address_t *)&fl->u.ip6.saddr);
1301 static inline int xfrm_state_kern(const struct xfrm_state *x)
1303 return atomic_read(&x->tunnel_users);
1306 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1308 return (!userproto || proto == userproto ||
1309 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1310 proto == IPPROTO_ESP ||
1311 proto == IPPROTO_COMP)));
1315 * xfrm algorithm information
1317 struct xfrm_algo_aead_info {
1321 struct xfrm_algo_auth_info {
1326 struct xfrm_algo_encr_info {
1331 struct xfrm_algo_comp_info {
1335 struct xfrm_algo_desc {
1339 u8 pfkey_supported:1;
1341 struct xfrm_algo_aead_info aead;
1342 struct xfrm_algo_auth_info auth;
1343 struct xfrm_algo_encr_info encr;
1344 struct xfrm_algo_comp_info comp;
1346 struct sadb_alg desc;
1349 /* XFRM tunnel handlers. */
1350 struct xfrm_tunnel {
1351 int (*handler)(struct sk_buff *skb);
1352 int (*err_handler)(struct sk_buff *skb, u32 info);
1354 struct xfrm_tunnel __rcu *next;
1358 struct xfrm6_tunnel {
1359 int (*handler)(struct sk_buff *skb);
1360 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1361 u8 type, u8 code, int offset, __be32 info);
1362 struct xfrm6_tunnel __rcu *next;
1366 extern void xfrm_init(void);
1367 extern void xfrm4_init(void);
1368 extern int xfrm_state_init(struct net *net);
1369 extern void xfrm_state_fini(struct net *net);
1370 extern void xfrm4_state_init(void);
1372 extern int xfrm6_init(void);
1373 extern void xfrm6_fini(void);
1374 extern int xfrm6_state_init(void);
1375 extern void xfrm6_state_fini(void);
1377 static inline int xfrm6_init(void)
1381 static inline void xfrm6_fini(void)
1387 #ifdef CONFIG_XFRM_STATISTICS
1388 extern int xfrm_proc_init(struct net *net);
1389 extern void xfrm_proc_fini(struct net *net);
1392 extern int xfrm_sysctl_init(struct net *net);
1393 #ifdef CONFIG_SYSCTL
1394 extern void xfrm_sysctl_fini(struct net *net);
1396 static inline void xfrm_sysctl_fini(struct net *net)
1401 extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto);
1402 extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1403 int (*func)(struct xfrm_state *, int, void*), void *);
1404 extern void xfrm_state_walk_done(struct xfrm_state_walk *walk);
1405 extern struct xfrm_state *xfrm_state_alloc(struct net *net);
1406 extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1407 const xfrm_address_t *saddr,
1408 const struct flowi *fl,
1409 struct xfrm_tmpl *tmpl,
1410 struct xfrm_policy *pol, int *err,
1411 unsigned short family);
1412 extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1413 xfrm_address_t *daddr,
1414 xfrm_address_t *saddr,
1415 unsigned short family,
1416 u8 mode, u8 proto, u32 reqid);
1417 extern int xfrm_state_check_expire(struct xfrm_state *x);
1418 extern void xfrm_state_insert(struct xfrm_state *x);
1419 extern int xfrm_state_add(struct xfrm_state *x);
1420 extern int xfrm_state_update(struct xfrm_state *x);
1421 extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1422 const xfrm_address_t *daddr, __be32 spi,
1423 u8 proto, unsigned short family);
1424 extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1425 const xfrm_address_t *daddr,
1426 const xfrm_address_t *saddr,
1428 unsigned short family);
1429 #ifdef CONFIG_XFRM_SUB_POLICY
1430 extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1431 int n, unsigned short family);
1432 extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1433 int n, unsigned short family);
1435 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1436 int n, unsigned short family)
1441 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1442 int n, unsigned short family)
1448 struct xfrmk_sadinfo {
1449 u32 sadhcnt; /* current hash bkts */
1450 u32 sadhmcnt; /* max allowed hash bkts */
1451 u32 sadcnt; /* current running count */
1454 struct xfrmk_spdinfo {
1465 extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark,
1467 extern int xfrm_state_delete(struct xfrm_state *x);
1468 extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info);
1469 extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1470 extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1471 extern u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1472 extern int xfrm_init_replay(struct xfrm_state *x);
1473 extern int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1474 extern int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
1475 extern int xfrm_init_state(struct xfrm_state *x);
1476 extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1477 extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi,
1479 extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1480 extern int xfrm_output_resume(struct sk_buff *skb, int err);
1481 extern int xfrm_output(struct sk_buff *skb);
1482 extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1483 extern void xfrm_local_error(struct sk_buff *skb, int mtu);
1484 extern int xfrm4_extract_header(struct sk_buff *skb);
1485 extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1486 extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1488 extern int xfrm4_transport_finish(struct sk_buff *skb, int async);
1489 extern int xfrm4_rcv(struct sk_buff *skb);
1491 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1493 return xfrm4_rcv_encap(skb, nexthdr, spi, 0);
1496 extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1497 extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1498 extern int xfrm4_output(struct sk_buff *skb);
1499 extern int xfrm4_output_finish(struct sk_buff *skb);
1500 extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1501 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1502 extern int xfrm4_mode_tunnel_input_register(struct xfrm_tunnel *handler);
1503 extern int xfrm4_mode_tunnel_input_deregister(struct xfrm_tunnel *handler);
1504 extern void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1505 extern int xfrm6_extract_header(struct sk_buff *skb);
1506 extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1507 extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi);
1508 extern int xfrm6_transport_finish(struct sk_buff *skb, int async);
1509 extern int xfrm6_rcv(struct sk_buff *skb);
1510 extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1511 xfrm_address_t *saddr, u8 proto);
1512 extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1513 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1514 extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1515 extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1516 extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1517 extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1518 extern int xfrm6_output(struct sk_buff *skb);
1519 extern int xfrm6_output_finish(struct sk_buff *skb);
1520 extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1522 extern void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1525 extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1526 extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen);
1528 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1530 return -ENOPROTOOPT;
1533 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1535 /* should not happen */
1541 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1543 extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1544 extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1545 int (*func)(struct xfrm_policy *, int, int, void*), void *);
1546 extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk);
1547 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1548 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1550 struct xfrm_selector *sel,
1551 struct xfrm_sec_ctx *ctx, int delete,
1553 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err);
1554 int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info);
1555 u32 xfrm_get_acqseq(void);
1556 extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1557 struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark,
1558 u8 mode, u32 reqid, u8 proto,
1559 const xfrm_address_t *daddr,
1560 const xfrm_address_t *saddr, int create,
1561 unsigned short family);
1562 extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1564 #ifdef CONFIG_XFRM_MIGRATE
1565 extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1566 const struct xfrm_migrate *m, int num_bundles,
1567 const struct xfrm_kmaddress *k);
1568 extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m);
1569 extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
1570 struct xfrm_migrate *m);
1571 extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1572 struct xfrm_migrate *m, int num_bundles,
1573 struct xfrm_kmaddress *k);
1576 extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1577 extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1578 extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
1580 extern void xfrm_input_init(void);
1581 extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1583 extern void xfrm_probe_algs(void);
1584 extern int xfrm_count_pfkey_auth_supported(void);
1585 extern int xfrm_count_pfkey_enc_supported(void);
1586 extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1587 extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1588 extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1589 extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1590 extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1591 extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1592 extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1593 extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1594 extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1597 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1598 const xfrm_address_t *b)
1600 return ipv6_addr_equal((const struct in6_addr *)a,
1601 (const struct in6_addr *)b);
1604 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1605 const xfrm_address_t *b,
1611 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1613 return xfrm6_addr_equal(a, b);
1617 static inline int xfrm_policy_id2dir(u32 index)
1623 static inline int xfrm_aevent_is_on(struct net *net)
1629 nlsk = rcu_dereference(net->xfrm.nlsk);
1631 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1637 static inline int xfrm_alg_len(const struct xfrm_algo *alg)
1639 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1642 static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1644 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1647 static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1649 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1652 #ifdef CONFIG_XFRM_MIGRATE
1653 static inline int xfrm_replay_clone(struct xfrm_state *x,
1654 struct xfrm_state *orig)
1656 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1661 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1662 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1664 x->preplay_esn = kmemdup(x->replay_esn,
1665 xfrm_replay_state_esn_len(x->replay_esn),
1667 if (!x->preplay_esn) {
1668 kfree(x->replay_esn);
1675 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1677 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1680 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1682 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1685 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1688 for (i = 0; i < n; i++)
1689 xfrm_state_put(*(states + i));
1692 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1695 for (i = 0; i < n; i++)
1696 xfrm_state_delete(*(states + i));
1701 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1703 return skb->sp->xvec[skb->sp->len - 1];
1707 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1709 if (attrs[XFRMA_MARK])
1710 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1717 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1722 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1726 #endif /* _NET_XFRM_H */