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>
23 #include <net/ip6_route.h>
26 #include <linux/interrupt.h>
28 #ifdef CONFIG_XFRM_STATISTICS
32 #define XFRM_PROTO_ESP 50
33 #define XFRM_PROTO_AH 51
34 #define XFRM_PROTO_COMP 108
35 #define XFRM_PROTO_IPIP 4
36 #define XFRM_PROTO_IPV6 41
37 #define XFRM_PROTO_ROUTING IPPROTO_ROUTING
38 #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
40 #define XFRM_ALIGN4(len) (((len) + 3) & ~3)
41 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
42 #define MODULE_ALIAS_XFRM_MODE(family, encap) \
43 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
44 #define MODULE_ALIAS_XFRM_TYPE(family, proto) \
45 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
47 #ifdef CONFIG_XFRM_STATISTICS
48 #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
49 #define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field)
50 #define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field)
52 #define XFRM_INC_STATS(net, field) ((void)(net))
53 #define XFRM_INC_STATS_BH(net, field) ((void)(net))
54 #define XFRM_INC_STATS_USER(net, field) ((void)(net))
57 extern struct mutex xfrm_cfg_mutex;
59 /* Organization of SPD aka "XFRM rules"
60 ------------------------------------
63 - policy rule, struct xfrm_policy (=SPD entry)
64 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
65 - instance of a transformer, struct xfrm_state (=SA)
66 - template to clone xfrm_state, struct xfrm_tmpl
68 SPD is plain linear list of xfrm_policy rules, ordered by priority.
69 (To be compatible with existing pfkeyv2 implementations,
70 many rules with priority of 0x7fffffff are allowed to exist and
71 such rules are ordered in an unpredictable way, thanks to bsd folks.)
73 Lookup is plain linear search until the first match with selector.
75 If "action" is "block", then we prohibit the flow, otherwise:
76 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
77 policy entry has list of up to XFRM_MAX_DEPTH transformations,
78 described by templates xfrm_tmpl. Each template is resolved
79 to a complete xfrm_state (see below) and we pack bundle of transformations
80 to a dst_entry returned to requestor.
82 dst -. xfrm .-> xfrm_state #1
83 |---. child .-> dst -. xfrm .-> xfrm_state #2
84 |---. child .-> dst -. xfrm .-> xfrm_state #3
87 Bundles are cached at xrfm_policy struct (field ->bundles).
90 Resolution of xrfm_tmpl
91 -----------------------
93 1. ->mode Mode: transport or tunnel
94 2. ->id.proto Protocol: AH/ESP/IPCOMP
95 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
96 Q: allow to resolve security gateway?
97 4. ->id.spi If not zero, static SPI.
98 5. ->saddr Local tunnel endpoint, ignored for transport mode.
99 6. ->algos List of allowed algos. Plain bitmask now.
100 Q: ealgos, aalgos, calgos. What a mess...
101 7. ->share Sharing mode.
102 Q: how to implement private sharing mode? To add struct sock* to
105 Having this template we search through SAD searching for entries
106 with appropriate mode/proto/algo, permitted by selector.
107 If no appropriate entry found, it is requested from key manager.
110 Q: How to find all the bundles referring to a physical path for
111 PMTU discovery? Seems, dst should contain list of all parents...
112 and enter to infinite locking hierarchy disaster.
113 No! It is easier, we will not search for them, let them find us.
114 We add genid to each dst plus pointer to genid of raw IP route,
115 pmtu disc will update pmtu on raw IP route and increase its genid.
116 dst_check() will see this for top level and trigger resyncing
117 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
120 struct xfrm_state_walk {
121 struct list_head all;
130 /* Full description of state of transformer. */
136 struct hlist_node gclist;
137 struct hlist_node bydst;
139 struct hlist_node bysrc;
140 struct hlist_node byspi;
146 struct xfrm_selector sel;
147 struct xfrm_mark mark;
152 /* Key manager bits */
153 struct xfrm_state_walk km;
155 /* Parameters of this state. */
160 u8 aalgo, ealgo, calgo;
163 xfrm_address_t saddr;
169 struct xfrm_lifetime_cfg lft;
171 /* Data for transformer */
172 struct xfrm_algo_auth *aalg;
173 struct xfrm_algo *ealg;
174 struct xfrm_algo *calg;
175 struct xfrm_algo_aead *aead;
177 /* Data for encapsulator */
178 struct xfrm_encap_tmpl *encap;
180 /* Data for care-of address */
181 xfrm_address_t *coaddr;
183 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
184 struct xfrm_state *tunnel;
186 /* If a tunnel, number of users + 1 */
187 atomic_t tunnel_users;
189 /* State for replay detection */
190 struct xfrm_replay_state replay;
191 struct xfrm_replay_state_esn *replay_esn;
193 /* Replay detection state at the time we sent the last notification */
194 struct xfrm_replay_state preplay;
195 struct xfrm_replay_state_esn *preplay_esn;
197 /* The functions for replay detection. */
198 struct xfrm_replay *repl;
200 /* internal flag that only holds state for delayed aevent at the
205 /* Replay detection notification settings */
209 /* Replay detection notification timer */
210 struct timer_list rtimer;
213 struct xfrm_stats stats;
215 struct xfrm_lifetime_cur curlft;
216 struct tasklet_hrtimer mtimer;
218 /* used to fix curlft->add_time when changing date */
222 unsigned long lastused;
224 /* Reference to data common to all the instances of this
226 const struct xfrm_type *type;
227 struct xfrm_mode *inner_mode;
228 struct xfrm_mode *inner_mode_iaf;
229 struct xfrm_mode *outer_mode;
231 /* Security context */
232 struct xfrm_sec_ctx *security;
234 /* Private data of this transformer, format is opaque,
235 * interpreted by xfrm_type methods. */
239 static inline struct net *xs_net(struct xfrm_state *x)
241 return read_pnet(&x->xs_net);
244 /* xflags - make enum if more show up */
245 #define XFRM_TIME_DEFER 1
246 #define XFRM_SOFT_EXPIRE 2
257 /* callback structure passed from either netlink or pfkey */
274 void (*advance)(struct xfrm_state *x, __be32 net_seq);
275 int (*check)(struct xfrm_state *x,
278 int (*recheck)(struct xfrm_state *x,
281 void (*notify)(struct xfrm_state *x, int event);
282 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
288 struct xfrm_policy_afinfo {
289 unsigned short family;
290 struct dst_ops *dst_ops;
291 void (*garbage_collect)(struct net *net);
292 struct dst_entry *(*dst_lookup)(struct net *net, int tos,
293 const xfrm_address_t *saddr,
294 const xfrm_address_t *daddr);
295 int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr);
296 void (*decode_session)(struct sk_buff *skb,
299 int (*get_tos)(const struct flowi *fl);
300 void (*init_dst)(struct net *net,
301 struct xfrm_dst *dst);
302 int (*init_path)(struct xfrm_dst *path,
303 struct dst_entry *dst,
305 int (*fill_dst)(struct xfrm_dst *xdst,
306 struct net_device *dev,
307 const struct flowi *fl);
308 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
311 extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
312 extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
313 extern void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c);
314 extern void km_state_notify(struct xfrm_state *x, const struct km_event *c);
317 extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
318 extern void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
319 extern int __xfrm_state_delete(struct xfrm_state *x);
321 struct xfrm_state_afinfo {
325 struct module *owner;
326 const struct xfrm_type *type_map[IPPROTO_MAX];
327 struct xfrm_mode *mode_map[XFRM_MODE_MAX];
328 int (*init_flags)(struct xfrm_state *x);
329 void (*init_tempsel)(struct xfrm_selector *sel,
330 const struct flowi *fl);
331 void (*init_temprop)(struct xfrm_state *x,
332 const struct xfrm_tmpl *tmpl,
333 const xfrm_address_t *daddr,
334 const xfrm_address_t *saddr);
335 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
336 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
337 int (*output)(struct sk_buff *skb);
338 int (*output_finish)(struct sk_buff *skb);
339 int (*extract_input)(struct xfrm_state *x,
340 struct sk_buff *skb);
341 int (*extract_output)(struct xfrm_state *x,
342 struct sk_buff *skb);
343 int (*transport_finish)(struct sk_buff *skb,
345 void (*local_error)(struct sk_buff *skb, u32 mtu);
348 extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
349 extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
350 extern struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
351 extern void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
353 extern void xfrm_state_delete_tunnel(struct xfrm_state *x);
357 struct module *owner;
360 #define XFRM_TYPE_NON_FRAGMENT 1
361 #define XFRM_TYPE_REPLAY_PROT 2
362 #define XFRM_TYPE_LOCAL_COADDR 4
363 #define XFRM_TYPE_REMOTE_COADDR 8
365 int (*init_state)(struct xfrm_state *x);
366 void (*destructor)(struct xfrm_state *);
367 int (*input)(struct xfrm_state *, struct sk_buff *skb);
368 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
369 int (*reject)(struct xfrm_state *, struct sk_buff *,
370 const struct flowi *);
371 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
372 /* Estimate maximal size of result of transformation of a dgram */
373 u32 (*get_mtu)(struct xfrm_state *, int size);
376 extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
377 extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
381 * Remove encapsulation header.
383 * The IP header will be moved over the top of the encapsulation
386 * On entry, the transport header shall point to where the IP header
387 * should be and the network header shall be set to where the IP
388 * header currently is. skb->data shall point to the start of the
391 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
394 * This is the actual input entry point.
396 * For transport mode and equivalent this would be identical to
397 * input2 (which does not need to be set). While tunnel mode
398 * and equivalent would set this to the tunnel encapsulation function
399 * xfrm4_prepare_input that would in turn call input2.
401 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
404 * Add encapsulation header.
406 * On exit, the transport header will be set to the start of the
407 * encapsulation header to be filled in by x->type->output and
408 * the mac header will be set to the nextheader (protocol for
409 * IPv4) field of the extension header directly preceding the
410 * encapsulation header, or in its absence, that of the top IP
411 * header. The value of the network header will always point
412 * to the top IP header while skb->data will point to the payload.
414 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
417 * This is the actual output entry point.
419 * For transport mode and equivalent this would be identical to
420 * output2 (which does not need to be set). While tunnel mode
421 * and equivalent would set this to a tunnel encapsulation function
422 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
425 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
427 struct xfrm_state_afinfo *afinfo;
428 struct module *owner;
433 /* Flags for xfrm_mode. */
435 XFRM_MODE_FLAG_TUNNEL = 1,
438 extern int xfrm_register_mode(struct xfrm_mode *mode, int family);
439 extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
441 static inline int xfrm_af2proto(unsigned int family)
453 static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
455 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
456 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
457 return x->inner_mode;
459 return x->inner_mode_iaf;
463 /* id in template is interpreted as:
464 * daddr - destination of tunnel, may be zero for transport mode.
465 * spi - zero to acquire spi. Not zero if spi is static, then
466 * daddr must be fixed too.
467 * proto - AH/ESP/IPCOMP
471 /* Source address of tunnel. Ignored, if it is not a tunnel. */
472 xfrm_address_t saddr;
474 unsigned short encap_family;
478 /* Mode: transport, tunnel etc. */
481 /* Sharing mode: unique, this session only, this user only etc. */
484 /* May skip this transfomration if no SA is found */
487 /* Skip aalgos/ealgos/calgos checks. */
490 /* Bit mask of algos allowed for acquisition */
496 #define XFRM_MAX_DEPTH 6
498 struct xfrm_policy_walk_entry {
499 struct list_head all;
503 struct xfrm_policy_walk {
504 struct xfrm_policy_walk_entry walk;
509 struct xfrm_policy_queue {
510 struct sk_buff_head hold_queue;
511 struct timer_list hold_timer;
512 unsigned long timeout;
519 struct hlist_node bydst;
520 struct hlist_node byidx;
522 /* This lock only affects elements except for entry. */
525 struct timer_list timer;
527 struct flow_cache_object flo;
531 struct xfrm_mark mark;
532 struct xfrm_selector selector;
533 struct xfrm_lifetime_cfg lft;
534 struct xfrm_lifetime_cur curlft;
535 struct xfrm_policy_walk_entry walk;
536 struct xfrm_policy_queue polq;
542 struct xfrm_sec_ctx *security;
543 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
546 static inline struct net *xp_net(const struct xfrm_policy *xp)
548 return read_pnet(&xp->xp_net);
551 struct xfrm_kmaddress {
552 xfrm_address_t local;
553 xfrm_address_t remote;
558 struct xfrm_migrate {
559 xfrm_address_t old_daddr;
560 xfrm_address_t old_saddr;
561 xfrm_address_t new_daddr;
562 xfrm_address_t new_saddr;
571 #define XFRM_KM_TIMEOUT 30
573 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
574 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
576 /* default aevent timeout in units of 100ms */
577 #define XFRM_AE_ETIME 10
578 /* Async Event timer multiplier */
579 #define XFRM_AE_ETH_M 10
580 /* default seq threshold size */
581 #define XFRM_AE_SEQT_SIZE 2
584 struct list_head list;
586 int (*notify)(struct xfrm_state *x, const struct km_event *c);
587 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
588 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
589 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
590 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
591 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
592 int (*migrate)(const struct xfrm_selector *sel,
594 const struct xfrm_migrate *m,
596 const struct xfrm_kmaddress *k);
599 extern int xfrm_register_km(struct xfrm_mgr *km);
600 extern int xfrm_unregister_km(struct xfrm_mgr *km);
603 * This structure is used for the duration where packets are being
604 * transformed by IPsec. As soon as the packet leaves IPsec the
605 * area beyond the generic IP part may be overwritten.
609 struct inet_skb_parm h4;
610 struct inet6_skb_parm h6;
613 /* Sequence number for replay protection. */
626 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
629 * This structure is used by the afinfo prepare_input/prepare_output functions
630 * to transmit header information to the mode input/output functions.
632 struct xfrm_mode_skb_cb {
634 struct inet_skb_parm h4;
635 struct inet6_skb_parm h6;
638 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
642 /* IP header length (excluding options or extension headers). */
645 /* TOS for IPv4, class for IPv6. */
648 /* TTL for IPv4, hop limitfor IPv6. */
651 /* Protocol for IPv4, NH for IPv6. */
654 /* Option length for IPv4, zero for IPv6. */
657 /* Used by IPv6 only, zero for IPv4. */
661 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
664 * This structure is used by the input processing to locate the SPI and
665 * related information.
667 struct xfrm_spi_skb_cb {
669 struct inet_skb_parm h4;
670 struct inet6_skb_parm h6;
673 unsigned int daddroff;
677 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
679 /* Audit Information */
686 #ifdef CONFIG_AUDITSYSCALL
687 static inline struct audit_buffer *xfrm_audit_start(const char *op)
689 struct audit_buffer *audit_buf = NULL;
691 if (audit_enabled == 0)
693 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
694 AUDIT_MAC_IPSEC_EVENT);
695 if (audit_buf == NULL)
697 audit_log_format(audit_buf, "op=%s", op);
701 static inline void xfrm_audit_helper_usrinfo(kuid_t auid, u32 ses, u32 secid,
702 struct audit_buffer *audit_buf)
707 audit_log_format(audit_buf, " auid=%u ses=%u",
708 from_kuid(&init_user_ns, auid), ses);
710 security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) {
711 audit_log_format(audit_buf, " subj=%s", secctx);
712 security_release_secctx(secctx, secctx_len);
714 audit_log_task_context(audit_buf);
717 extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
718 kuid_t auid, u32 ses, u32 secid);
719 extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
720 kuid_t auid, u32 ses, u32 secid);
721 extern void xfrm_audit_state_add(struct xfrm_state *x, int result,
722 kuid_t auid, u32 ses, u32 secid);
723 extern void xfrm_audit_state_delete(struct xfrm_state *x, int result,
724 kuid_t auid, u32 ses, u32 secid);
725 extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
726 struct sk_buff *skb);
727 extern void xfrm_audit_state_replay(struct xfrm_state *x,
728 struct sk_buff *skb, __be32 net_seq);
729 extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
730 extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
731 __be32 net_spi, __be32 net_seq);
732 extern void xfrm_audit_state_icvfail(struct xfrm_state *x,
733 struct sk_buff *skb, u8 proto);
736 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
737 kuid_t auid, u32 ses, u32 secid)
741 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
742 kuid_t auid, u32 ses, u32 secid)
746 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
747 kuid_t auid, u32 ses, u32 secid)
751 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
752 kuid_t auid, u32 ses, u32 secid)
756 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
761 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
762 struct sk_buff *skb, __be32 net_seq)
766 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
771 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
772 __be32 net_spi, __be32 net_seq)
776 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
777 struct sk_buff *skb, u8 proto)
780 #endif /* CONFIG_AUDITSYSCALL */
782 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
784 if (likely(policy != NULL))
785 atomic_inc(&policy->refcnt);
788 extern void xfrm_policy_destroy(struct xfrm_policy *policy);
790 static inline void xfrm_pol_put(struct xfrm_policy *policy)
792 if (atomic_dec_and_test(&policy->refcnt))
793 xfrm_policy_destroy(policy);
796 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
799 for (i = npols - 1; i >= 0; --i)
800 xfrm_pol_put(pols[i]);
803 extern void __xfrm_state_destroy(struct xfrm_state *);
805 static inline void __xfrm_state_put(struct xfrm_state *x)
807 atomic_dec(&x->refcnt);
810 static inline void xfrm_state_put(struct xfrm_state *x)
812 if (atomic_dec_and_test(&x->refcnt))
813 __xfrm_state_destroy(x);
816 static inline void xfrm_state_hold(struct xfrm_state *x)
818 atomic_inc(&x->refcnt);
821 static inline bool addr_match(const void *token1, const void *token2,
824 const __be32 *a1 = token1;
825 const __be32 *a2 = token2;
829 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
830 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
833 if (memcmp(a1, a2, pdw << 2))
839 mask = htonl((0xffffffff) << (32 - pbi));
841 if ((a1[pdw] ^ a2[pdw]) & mask)
848 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
850 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
853 return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen)));
857 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
860 switch(fl->flowi_proto) {
863 case IPPROTO_UDPLITE:
865 port = uli->ports.sport;
869 port = htons(uli->icmpt.type);
872 port = htons(uli->mht.type);
875 port = htons(ntohl(uli->gre_key) >> 16);
884 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
887 switch(fl->flowi_proto) {
890 case IPPROTO_UDPLITE:
892 port = uli->ports.dport;
896 port = htons(uli->icmpt.code);
899 port = htons(ntohl(uli->gre_key) & 0xffff);
907 extern bool xfrm_selector_match(const struct xfrm_selector *sel,
908 const struct flowi *fl,
909 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 extern 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 extern 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 extern 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 extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family);
1065 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1066 struct sk_buff *skb,
1067 unsigned int family, int reverse)
1069 struct net *net = dev_net(skb->dev);
1070 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1072 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1073 return __xfrm_policy_check(sk, ndir, skb, family);
1075 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
1076 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1077 __xfrm_policy_check(sk, ndir, skb, family);
1080 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1082 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1085 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1087 return xfrm_policy_check(sk, dir, skb, AF_INET);
1090 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1092 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1095 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1096 struct sk_buff *skb)
1098 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1101 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1102 struct sk_buff *skb)
1104 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1107 extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1108 unsigned int family, int reverse);
1110 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1111 unsigned int family)
1113 return __xfrm_decode_session(skb, fl, family, 0);
1116 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1118 unsigned int family)
1120 return __xfrm_decode_session(skb, fl, family, 1);
1123 extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1125 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1127 struct net *net = dev_net(skb->dev);
1129 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1130 (skb_dst(skb)->flags & DST_NOXFRM) ||
1131 __xfrm_route_forward(skb, family);
1134 static inline int xfrm4_route_forward(struct sk_buff *skb)
1136 return xfrm_route_forward(skb, AF_INET);
1139 static inline int xfrm6_route_forward(struct sk_buff *skb)
1141 return xfrm_route_forward(skb, AF_INET6);
1144 extern int __xfrm_sk_clone_policy(struct sock *sk);
1146 static inline int xfrm_sk_clone_policy(struct sock *sk)
1148 if (unlikely(sk->sk_policy[0] || sk->sk_policy[1]))
1149 return __xfrm_sk_clone_policy(sk);
1153 extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1155 static inline void xfrm_sk_free_policy(struct sock *sk)
1157 if (unlikely(sk->sk_policy[0] != NULL)) {
1158 xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX);
1159 sk->sk_policy[0] = NULL;
1161 if (unlikely(sk->sk_policy[1] != NULL)) {
1162 xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1);
1163 sk->sk_policy[1] = NULL;
1167 extern void xfrm_garbage_collect(struct net *net);
1171 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1172 static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; }
1173 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1174 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1175 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1179 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1183 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1187 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1189 unsigned int family)
1193 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1194 struct sk_buff *skb)
1198 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1199 struct sk_buff *skb)
1203 static inline void xfrm_garbage_collect(struct net *net)
1209 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1213 return (xfrm_address_t *)&fl->u.ip4.daddr;
1215 return (xfrm_address_t *)&fl->u.ip6.daddr;
1221 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1225 return (xfrm_address_t *)&fl->u.ip4.saddr;
1227 return (xfrm_address_t *)&fl->u.ip6.saddr;
1233 void xfrm_flowi_addr_get(const struct flowi *fl,
1234 xfrm_address_t *saddr, xfrm_address_t *daddr,
1235 unsigned short family)
1239 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1240 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1243 *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr;
1244 *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr;
1249 static __inline__ int
1250 __xfrm4_state_addr_check(const struct xfrm_state *x,
1251 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1253 if (daddr->a4 == x->id.daddr.a4 &&
1254 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1259 static __inline__ int
1260 __xfrm6_state_addr_check(const struct xfrm_state *x,
1261 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1263 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1264 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1265 ipv6_addr_any((struct in6_addr *)saddr) ||
1266 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1271 static __inline__ int
1272 xfrm_state_addr_check(const struct xfrm_state *x,
1273 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1274 unsigned short family)
1278 return __xfrm4_state_addr_check(x, daddr, saddr);
1280 return __xfrm6_state_addr_check(x, daddr, saddr);
1285 static __inline__ int
1286 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1287 unsigned short family)
1291 return __xfrm4_state_addr_check(x,
1292 (const xfrm_address_t *)&fl->u.ip4.daddr,
1293 (const xfrm_address_t *)&fl->u.ip4.saddr);
1295 return __xfrm6_state_addr_check(x,
1296 (const xfrm_address_t *)&fl->u.ip6.daddr,
1297 (const xfrm_address_t *)&fl->u.ip6.saddr);
1302 static inline int xfrm_state_kern(const struct xfrm_state *x)
1304 return atomic_read(&x->tunnel_users);
1307 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1309 return (!userproto || proto == userproto ||
1310 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1311 proto == IPPROTO_ESP ||
1312 proto == IPPROTO_COMP)));
1316 * xfrm algorithm information
1318 struct xfrm_algo_aead_info {
1322 struct xfrm_algo_auth_info {
1327 struct xfrm_algo_encr_info {
1332 struct xfrm_algo_comp_info {
1336 struct xfrm_algo_desc {
1340 u8 pfkey_supported:1;
1342 struct xfrm_algo_aead_info aead;
1343 struct xfrm_algo_auth_info auth;
1344 struct xfrm_algo_encr_info encr;
1345 struct xfrm_algo_comp_info comp;
1347 struct sadb_alg desc;
1350 /* XFRM tunnel handlers. */
1351 struct xfrm_tunnel {
1352 int (*handler)(struct sk_buff *skb);
1353 int (*err_handler)(struct sk_buff *skb, u32 info);
1355 struct xfrm_tunnel __rcu *next;
1359 struct xfrm6_tunnel {
1360 int (*handler)(struct sk_buff *skb);
1361 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1362 u8 type, u8 code, int offset, __be32 info);
1363 struct xfrm6_tunnel __rcu *next;
1367 extern void xfrm_init(void);
1368 extern void xfrm4_init(void);
1369 extern int xfrm_state_init(struct net *net);
1370 extern void xfrm_state_fini(struct net *net);
1371 extern void xfrm4_state_init(void);
1373 extern int xfrm6_init(void);
1374 extern void xfrm6_fini(void);
1375 extern int xfrm6_state_init(void);
1376 extern void xfrm6_state_fini(void);
1378 static inline int xfrm6_init(void)
1382 static inline void xfrm6_fini(void)
1388 #ifdef CONFIG_XFRM_STATISTICS
1389 extern int xfrm_proc_init(struct net *net);
1390 extern void xfrm_proc_fini(struct net *net);
1393 extern int xfrm_sysctl_init(struct net *net);
1394 #ifdef CONFIG_SYSCTL
1395 extern void xfrm_sysctl_fini(struct net *net);
1397 static inline void xfrm_sysctl_fini(struct net *net)
1402 extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto);
1403 extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1404 int (*func)(struct xfrm_state *, int, void*), void *);
1405 extern void xfrm_state_walk_done(struct xfrm_state_walk *walk);
1406 extern struct xfrm_state *xfrm_state_alloc(struct net *net);
1407 extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1408 const xfrm_address_t *saddr,
1409 const struct flowi *fl,
1410 struct xfrm_tmpl *tmpl,
1411 struct xfrm_policy *pol, int *err,
1412 unsigned short family);
1413 extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1414 xfrm_address_t *daddr,
1415 xfrm_address_t *saddr,
1416 unsigned short family,
1417 u8 mode, u8 proto, u32 reqid);
1418 extern int xfrm_state_check_expire(struct xfrm_state *x);
1419 extern void xfrm_state_insert(struct xfrm_state *x);
1420 extern int xfrm_state_add(struct xfrm_state *x);
1421 extern int xfrm_state_update(struct xfrm_state *x);
1422 extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1423 const xfrm_address_t *daddr, __be32 spi,
1424 u8 proto, unsigned short family);
1425 extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1426 const xfrm_address_t *daddr,
1427 const xfrm_address_t *saddr,
1429 unsigned short family);
1430 #ifdef CONFIG_XFRM_SUB_POLICY
1431 extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1432 int n, unsigned short family);
1433 extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1434 int n, unsigned short family);
1436 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1437 int n, unsigned short family)
1442 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1443 int n, unsigned short family)
1449 struct xfrmk_sadinfo {
1450 u32 sadhcnt; /* current hash bkts */
1451 u32 sadhmcnt; /* max allowed hash bkts */
1452 u32 sadcnt; /* current running count */
1455 struct xfrmk_spdinfo {
1466 extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark,
1468 extern int xfrm_state_delete(struct xfrm_state *x);
1469 extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info);
1470 extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1471 extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1472 extern u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1473 extern int xfrm_init_replay(struct xfrm_state *x);
1474 extern int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1475 extern int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
1476 extern int xfrm_init_state(struct xfrm_state *x);
1477 extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1478 extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi,
1480 extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1481 extern int xfrm_output_resume(struct sk_buff *skb, int err);
1482 extern int xfrm_output(struct sk_buff *skb);
1483 extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1484 extern void xfrm_local_error(struct sk_buff *skb, int mtu);
1485 extern int xfrm4_extract_header(struct sk_buff *skb);
1486 extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1487 extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1489 extern int xfrm4_transport_finish(struct sk_buff *skb, int async);
1490 extern int xfrm4_rcv(struct sk_buff *skb);
1492 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1494 return xfrm4_rcv_encap(skb, nexthdr, spi, 0);
1497 extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1498 extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1499 extern int xfrm4_output(struct sk_buff *skb);
1500 extern int xfrm4_output_finish(struct sk_buff *skb);
1501 extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1502 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1503 extern int xfrm4_mode_tunnel_input_register(struct xfrm_tunnel *handler);
1504 extern int xfrm4_mode_tunnel_input_deregister(struct xfrm_tunnel *handler);
1505 extern void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1506 extern int xfrm6_extract_header(struct sk_buff *skb);
1507 extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1508 extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi);
1509 extern int xfrm6_transport_finish(struct sk_buff *skb, int async);
1510 extern int xfrm6_rcv(struct sk_buff *skb);
1511 extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1512 xfrm_address_t *saddr, u8 proto);
1513 extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1514 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1515 extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1516 extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1517 extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1518 extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1519 extern int xfrm6_output(struct sk_buff *skb);
1520 extern int xfrm6_output_finish(struct sk_buff *skb);
1521 extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1523 extern void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1526 extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1527 extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen);
1529 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1531 return -ENOPROTOOPT;
1534 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1536 /* should not happen */
1542 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1544 extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1545 extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1546 int (*func)(struct xfrm_policy *, int, int, void*), void *);
1547 extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk);
1548 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1549 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1551 struct xfrm_selector *sel,
1552 struct xfrm_sec_ctx *ctx, int delete,
1554 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err);
1555 int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info);
1556 u32 xfrm_get_acqseq(void);
1557 extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1558 struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark,
1559 u8 mode, u32 reqid, u8 proto,
1560 const xfrm_address_t *daddr,
1561 const xfrm_address_t *saddr, int create,
1562 unsigned short family);
1563 extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1565 #ifdef CONFIG_XFRM_MIGRATE
1566 extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1567 const struct xfrm_migrate *m, int num_bundles,
1568 const struct xfrm_kmaddress *k);
1569 extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m);
1570 extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
1571 struct xfrm_migrate *m);
1572 extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1573 struct xfrm_migrate *m, int num_bundles,
1574 struct xfrm_kmaddress *k);
1577 extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1578 extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1579 extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
1581 extern void xfrm_input_init(void);
1582 extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1584 extern void xfrm_probe_algs(void);
1585 extern int xfrm_count_pfkey_auth_supported(void);
1586 extern int xfrm_count_pfkey_enc_supported(void);
1587 extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1588 extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1589 extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1590 extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1591 extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1592 extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1593 extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1594 extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1595 extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1598 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1599 const xfrm_address_t *b)
1601 return ipv6_addr_equal((const struct in6_addr *)a,
1602 (const struct in6_addr *)b);
1605 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1606 const xfrm_address_t *b,
1612 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1614 return xfrm6_addr_equal(a, b);
1618 static inline int xfrm_policy_id2dir(u32 index)
1624 static inline int xfrm_aevent_is_on(struct net *net)
1630 nlsk = rcu_dereference(net->xfrm.nlsk);
1632 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1638 static inline int xfrm_alg_len(const struct xfrm_algo *alg)
1640 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1643 static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1645 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1648 static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1650 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1653 #ifdef CONFIG_XFRM_MIGRATE
1654 static inline int xfrm_replay_clone(struct xfrm_state *x,
1655 struct xfrm_state *orig)
1657 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1662 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1663 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1665 x->preplay_esn = kmemdup(x->replay_esn,
1666 xfrm_replay_state_esn_len(x->replay_esn),
1668 if (!x->preplay_esn) {
1669 kfree(x->replay_esn);
1676 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1678 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1681 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1683 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1686 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1689 for (i = 0; i < n; i++)
1690 xfrm_state_put(*(states + i));
1693 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1696 for (i = 0; i < n; i++)
1697 xfrm_state_delete(*(states + i));
1702 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1704 return skb->sp->xvec[skb->sp->len - 1];
1708 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1710 if (attrs[XFRMA_MARK])
1711 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1718 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1723 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1727 static inline int xfrm_skb_dst_mtu(struct sk_buff *skb)
1729 struct sock *sk = skb->sk;
1731 if (sk && skb->protocol == htons(ETH_P_IPV6))
1732 return ip6_skb_dst_mtu(skb);
1733 else if (sk && skb->protocol == htons(ETH_P_IP))
1734 return ip_skb_dst_mtu(skb);
1735 return dst_mtu(skb_dst(skb));
1738 #endif /* _NET_XFRM_H */