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)
49 #define XFRM_INC_STATS(net, field) ((void)(net))
53 /* Organization of SPD aka "XFRM rules"
54 ------------------------------------
57 - policy rule, struct xfrm_policy (=SPD entry)
58 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
59 - instance of a transformer, struct xfrm_state (=SA)
60 - template to clone xfrm_state, struct xfrm_tmpl
62 SPD is plain linear list of xfrm_policy rules, ordered by priority.
63 (To be compatible with existing pfkeyv2 implementations,
64 many rules with priority of 0x7fffffff are allowed to exist and
65 such rules are ordered in an unpredictable way, thanks to bsd folks.)
67 Lookup is plain linear search until the first match with selector.
69 If "action" is "block", then we prohibit the flow, otherwise:
70 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
71 policy entry has list of up to XFRM_MAX_DEPTH transformations,
72 described by templates xfrm_tmpl. Each template is resolved
73 to a complete xfrm_state (see below) and we pack bundle of transformations
74 to a dst_entry returned to requestor.
76 dst -. xfrm .-> xfrm_state #1
77 |---. child .-> dst -. xfrm .-> xfrm_state #2
78 |---. child .-> dst -. xfrm .-> xfrm_state #3
81 Bundles are cached at xrfm_policy struct (field ->bundles).
84 Resolution of xrfm_tmpl
85 -----------------------
87 1. ->mode Mode: transport or tunnel
88 2. ->id.proto Protocol: AH/ESP/IPCOMP
89 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
90 Q: allow to resolve security gateway?
91 4. ->id.spi If not zero, static SPI.
92 5. ->saddr Local tunnel endpoint, ignored for transport mode.
93 6. ->algos List of allowed algos. Plain bitmask now.
94 Q: ealgos, aalgos, calgos. What a mess...
95 7. ->share Sharing mode.
96 Q: how to implement private sharing mode? To add struct sock* to
99 Having this template we search through SAD searching for entries
100 with appropriate mode/proto/algo, permitted by selector.
101 If no appropriate entry found, it is requested from key manager.
104 Q: How to find all the bundles referring to a physical path for
105 PMTU discovery? Seems, dst should contain list of all parents...
106 and enter to infinite locking hierarchy disaster.
107 No! It is easier, we will not search for them, let them find us.
108 We add genid to each dst plus pointer to genid of raw IP route,
109 pmtu disc will update pmtu on raw IP route and increase its genid.
110 dst_check() will see this for top level and trigger resyncing
111 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
114 struct xfrm_state_walk {
115 struct list_head all;
120 struct xfrm_address_filter *filter;
123 /* Full description of state of transformer. */
125 possible_net_t xs_net;
127 struct hlist_node gclist;
128 struct hlist_node bydst;
130 struct hlist_node bysrc;
131 struct hlist_node byspi;
137 struct xfrm_selector sel;
138 struct xfrm_mark mark;
143 /* Key manager bits */
144 struct xfrm_state_walk km;
146 /* Parameters of this state. */
151 u8 aalgo, ealgo, calgo;
154 xfrm_address_t saddr;
160 struct xfrm_lifetime_cfg lft;
162 /* Data for transformer */
163 struct xfrm_algo_auth *aalg;
164 struct xfrm_algo *ealg;
165 struct xfrm_algo *calg;
166 struct xfrm_algo_aead *aead;
169 /* Data for encapsulator */
170 struct xfrm_encap_tmpl *encap;
172 /* Data for care-of address */
173 xfrm_address_t *coaddr;
175 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
176 struct xfrm_state *tunnel;
178 /* If a tunnel, number of users + 1 */
179 atomic_t tunnel_users;
181 /* State for replay detection */
182 struct xfrm_replay_state replay;
183 struct xfrm_replay_state_esn *replay_esn;
185 /* Replay detection state at the time we sent the last notification */
186 struct xfrm_replay_state preplay;
187 struct xfrm_replay_state_esn *preplay_esn;
189 /* The functions for replay detection. */
190 const struct xfrm_replay *repl;
192 /* internal flag that only holds state for delayed aevent at the
197 /* Replay detection notification settings */
201 /* Replay detection notification timer */
202 struct timer_list rtimer;
205 struct xfrm_stats stats;
207 struct xfrm_lifetime_cur curlft;
208 struct tasklet_hrtimer mtimer;
210 /* used to fix curlft->add_time when changing date */
214 unsigned long lastused;
216 struct page_frag xfrag;
218 /* Reference to data common to all the instances of this
220 const struct xfrm_type *type;
221 struct xfrm_mode *inner_mode;
222 struct xfrm_mode *inner_mode_iaf;
223 struct xfrm_mode *outer_mode;
225 /* Security context */
226 struct xfrm_sec_ctx *security;
228 /* Private data of this transformer, format is opaque,
229 * interpreted by xfrm_type methods. */
233 static inline struct net *xs_net(struct xfrm_state *x)
235 return read_pnet(&x->xs_net);
238 /* xflags - make enum if more show up */
239 #define XFRM_TIME_DEFER 1
240 #define XFRM_SOFT_EXPIRE 2
251 /* callback structure passed from either netlink or pfkey */
268 void (*advance)(struct xfrm_state *x, __be32 net_seq);
269 int (*check)(struct xfrm_state *x,
272 int (*recheck)(struct xfrm_state *x,
275 void (*notify)(struct xfrm_state *x, int event);
276 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
282 struct xfrm_policy_afinfo {
283 unsigned short family;
284 struct dst_ops *dst_ops;
285 void (*garbage_collect)(struct net *net);
286 struct dst_entry *(*dst_lookup)(struct net *net,
288 const xfrm_address_t *saddr,
289 const xfrm_address_t *daddr);
290 int (*get_saddr)(struct net *net, int oif,
291 xfrm_address_t *saddr,
292 xfrm_address_t *daddr);
293 void (*decode_session)(struct sk_buff *skb,
296 int (*get_tos)(const struct flowi *fl);
297 int (*init_path)(struct xfrm_dst *path,
298 struct dst_entry *dst,
300 int (*fill_dst)(struct xfrm_dst *xdst,
301 struct net_device *dev,
302 const struct flowi *fl);
303 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
306 int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
307 int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
308 void km_policy_notify(struct xfrm_policy *xp, int dir,
309 const struct km_event *c);
310 void km_state_notify(struct xfrm_state *x, const struct km_event *c);
313 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
314 struct xfrm_policy *pol);
315 void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
316 int __xfrm_state_delete(struct xfrm_state *x);
318 struct xfrm_state_afinfo {
322 struct module *owner;
323 const struct xfrm_type *type_map[IPPROTO_MAX];
324 struct xfrm_mode *mode_map[XFRM_MODE_MAX];
325 int (*init_flags)(struct xfrm_state *x);
326 void (*init_tempsel)(struct xfrm_selector *sel,
327 const struct flowi *fl);
328 void (*init_temprop)(struct xfrm_state *x,
329 const struct xfrm_tmpl *tmpl,
330 const xfrm_address_t *daddr,
331 const xfrm_address_t *saddr);
332 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
333 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
334 int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
335 int (*output_finish)(struct sock *sk, struct sk_buff *skb);
336 int (*extract_input)(struct xfrm_state *x,
337 struct sk_buff *skb);
338 int (*extract_output)(struct xfrm_state *x,
339 struct sk_buff *skb);
340 int (*transport_finish)(struct sk_buff *skb,
342 void (*local_error)(struct sk_buff *skb, u32 mtu);
345 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
346 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
347 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
348 struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family);
350 struct xfrm_input_afinfo {
352 struct module *owner;
353 int (*callback)(struct sk_buff *skb, u8 protocol,
357 int xfrm_input_register_afinfo(struct xfrm_input_afinfo *afinfo);
358 int xfrm_input_unregister_afinfo(struct xfrm_input_afinfo *afinfo);
360 void xfrm_state_delete_tunnel(struct xfrm_state *x);
364 struct module *owner;
367 #define XFRM_TYPE_NON_FRAGMENT 1
368 #define XFRM_TYPE_REPLAY_PROT 2
369 #define XFRM_TYPE_LOCAL_COADDR 4
370 #define XFRM_TYPE_REMOTE_COADDR 8
372 int (*init_state)(struct xfrm_state *x);
373 void (*destructor)(struct xfrm_state *);
374 int (*input)(struct xfrm_state *, struct sk_buff *skb);
375 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
376 int (*reject)(struct xfrm_state *, struct sk_buff *,
377 const struct flowi *);
378 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
379 /* Estimate maximal size of result of transformation of a dgram */
380 u32 (*get_mtu)(struct xfrm_state *, int size);
383 int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
384 int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
388 * Remove encapsulation header.
390 * The IP header will be moved over the top of the encapsulation
393 * On entry, the transport header shall point to where the IP header
394 * should be and the network header shall be set to where the IP
395 * header currently is. skb->data shall point to the start of the
398 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
401 * This is the actual input entry point.
403 * For transport mode and equivalent this would be identical to
404 * input2 (which does not need to be set). While tunnel mode
405 * and equivalent would set this to the tunnel encapsulation function
406 * xfrm4_prepare_input that would in turn call input2.
408 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
411 * Add encapsulation header.
413 * On exit, the transport header will be set to the start of the
414 * encapsulation header to be filled in by x->type->output and
415 * the mac header will be set to the nextheader (protocol for
416 * IPv4) field of the extension header directly preceding the
417 * encapsulation header, or in its absence, that of the top IP
418 * header. The value of the network header will always point
419 * to the top IP header while skb->data will point to the payload.
421 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
424 * This is the actual output entry point.
426 * For transport mode and equivalent this would be identical to
427 * output2 (which does not need to be set). While tunnel mode
428 * and equivalent would set this to a tunnel encapsulation function
429 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
432 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
434 struct xfrm_state_afinfo *afinfo;
435 struct module *owner;
440 /* Flags for xfrm_mode. */
442 XFRM_MODE_FLAG_TUNNEL = 1,
445 int xfrm_register_mode(struct xfrm_mode *mode, int family);
446 int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
448 static inline int xfrm_af2proto(unsigned int family)
460 static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
462 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
463 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
464 return x->inner_mode;
466 return x->inner_mode_iaf;
470 /* id in template is interpreted as:
471 * daddr - destination of tunnel, may be zero for transport mode.
472 * spi - zero to acquire spi. Not zero if spi is static, then
473 * daddr must be fixed too.
474 * proto - AH/ESP/IPCOMP
478 /* Source address of tunnel. Ignored, if it is not a tunnel. */
479 xfrm_address_t saddr;
481 unsigned short encap_family;
485 /* Mode: transport, tunnel etc. */
488 /* Sharing mode: unique, this session only, this user only etc. */
491 /* May skip this transfomration if no SA is found */
494 /* Skip aalgos/ealgos/calgos checks. */
497 /* Bit mask of algos allowed for acquisition */
503 #define XFRM_MAX_DEPTH 6
505 struct xfrm_policy_walk_entry {
506 struct list_head all;
510 struct xfrm_policy_walk {
511 struct xfrm_policy_walk_entry walk;
516 struct xfrm_policy_queue {
517 struct sk_buff_head hold_queue;
518 struct timer_list hold_timer;
519 unsigned long timeout;
523 possible_net_t xp_net;
524 struct hlist_node bydst;
525 struct hlist_node byidx;
527 /* This lock only affects elements except for entry. */
530 struct timer_list timer;
532 struct flow_cache_object flo;
536 struct xfrm_mark mark;
537 struct xfrm_selector selector;
538 struct xfrm_lifetime_cfg lft;
539 struct xfrm_lifetime_cur curlft;
540 struct xfrm_policy_walk_entry walk;
541 struct xfrm_policy_queue polq;
547 struct xfrm_sec_ctx *security;
548 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
552 static inline struct net *xp_net(const struct xfrm_policy *xp)
554 return read_pnet(&xp->xp_net);
557 struct xfrm_kmaddress {
558 xfrm_address_t local;
559 xfrm_address_t remote;
564 struct xfrm_migrate {
565 xfrm_address_t old_daddr;
566 xfrm_address_t old_saddr;
567 xfrm_address_t new_daddr;
568 xfrm_address_t new_saddr;
577 #define XFRM_KM_TIMEOUT 30
579 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
580 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
582 /* default aevent timeout in units of 100ms */
583 #define XFRM_AE_ETIME 10
584 /* Async Event timer multiplier */
585 #define XFRM_AE_ETH_M 10
586 /* default seq threshold size */
587 #define XFRM_AE_SEQT_SIZE 2
590 struct list_head list;
592 int (*notify)(struct xfrm_state *x, const struct km_event *c);
593 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
594 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
595 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
596 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
597 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
598 int (*migrate)(const struct xfrm_selector *sel,
600 const struct xfrm_migrate *m,
602 const struct xfrm_kmaddress *k);
603 bool (*is_alive)(const struct km_event *c);
606 int xfrm_register_km(struct xfrm_mgr *km);
607 int xfrm_unregister_km(struct xfrm_mgr *km);
609 struct xfrm_tunnel_skb_cb {
611 struct inet_skb_parm h4;
612 struct inet6_skb_parm h6;
616 struct ip_tunnel *ip4;
621 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
624 * This structure is used for the duration where packets are being
625 * transformed by IPsec. As soon as the packet leaves IPsec the
626 * area beyond the generic IP part may be overwritten.
629 struct xfrm_tunnel_skb_cb header;
631 /* Sequence number for replay protection. */
644 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
647 * This structure is used by the afinfo prepare_input/prepare_output functions
648 * to transmit header information to the mode input/output functions.
650 struct xfrm_mode_skb_cb {
651 struct xfrm_tunnel_skb_cb header;
653 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
657 /* IP header length (excluding options or extension headers). */
660 /* TOS for IPv4, class for IPv6. */
663 /* TTL for IPv4, hop limitfor IPv6. */
666 /* Protocol for IPv4, NH for IPv6. */
669 /* Option length for IPv4, zero for IPv6. */
672 /* Used by IPv6 only, zero for IPv4. */
676 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
679 * This structure is used by the input processing to locate the SPI and
680 * related information.
682 struct xfrm_spi_skb_cb {
683 struct xfrm_tunnel_skb_cb header;
685 unsigned int daddroff;
689 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
691 #ifdef CONFIG_AUDITSYSCALL
692 static inline struct audit_buffer *xfrm_audit_start(const char *op)
694 struct audit_buffer *audit_buf = NULL;
696 if (audit_enabled == 0)
698 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
699 AUDIT_MAC_IPSEC_EVENT);
700 if (audit_buf == NULL)
702 audit_log_format(audit_buf, "op=%s", op);
706 static inline void xfrm_audit_helper_usrinfo(bool task_valid,
707 struct audit_buffer *audit_buf)
709 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
710 audit_get_loginuid(current) :
712 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
715 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
716 audit_log_task_context(audit_buf);
719 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
720 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
722 void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
723 void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
724 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
725 struct sk_buff *skb);
726 void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
728 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
729 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
731 void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
735 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
740 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
745 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
750 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
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 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 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 bool xfrm_selector_match(const struct xfrm_selector *sel,
907 const struct flowi *fl, unsigned short family);
909 #ifdef CONFIG_SECURITY_NETWORK_XFRM
910 /* If neither has a context --> match
911 * Otherwise, both must have a context and the sids, doi, alg must match
913 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
915 return ((!s1 && !s2) ||
917 (s1->ctx_sid == s2->ctx_sid) &&
918 (s1->ctx_doi == s2->ctx_doi) &&
919 (s1->ctx_alg == s2->ctx_alg)));
922 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
928 /* A struct encoding bundle of transformations to apply to some set of flow.
930 * dst->child points to the next element of bundle.
931 * dst->xfrm points to an instanse of transformer.
933 * Due to unfortunate limitations of current routing cache, which we
934 * have no time to fix, it mirrors struct rtable and bound to the same
935 * routing key, including saddr,daddr. However, we can have many of
936 * bundles differing by session id. All the bundles grow from a parent
941 struct dst_entry dst;
945 struct dst_entry *route;
946 struct flow_cache_object flo;
947 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
948 int num_pols, num_xfrms;
949 #ifdef CONFIG_XFRM_SUB_POLICY
950 struct flowi *origin;
951 struct xfrm_selector *partner;
955 u32 route_mtu_cached;
956 u32 child_mtu_cached;
962 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
964 xfrm_pols_put(xdst->pols, xdst->num_pols);
965 dst_release(xdst->route);
966 if (likely(xdst->u.dst.xfrm))
967 xfrm_state_put(xdst->u.dst.xfrm);
968 #ifdef CONFIG_XFRM_SUB_POLICY
971 kfree(xdst->partner);
972 xdst->partner = NULL;
977 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
982 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
985 static inline int secpath_exists(struct sk_buff *skb)
988 return skb->sp != NULL;
994 static inline struct sec_path *
995 secpath_get(struct sec_path *sp)
998 atomic_inc(&sp->refcnt);
1002 void __secpath_destroy(struct sec_path *sp);
1005 secpath_put(struct sec_path *sp)
1007 if (sp && atomic_dec_and_test(&sp->refcnt))
1008 __secpath_destroy(sp);
1011 struct sec_path *secpath_dup(struct sec_path *src);
1014 secpath_reset(struct sk_buff *skb)
1017 secpath_put(skb->sp);
1023 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1027 return addr->a4 == 0;
1029 return ipv6_addr_any(&addr->in6);
1035 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1037 return (tmpl->saddr.a4 &&
1038 tmpl->saddr.a4 != x->props.saddr.a4);
1042 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1044 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1045 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1049 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1053 return __xfrm4_state_addr_cmp(tmpl, x);
1055 return __xfrm6_state_addr_cmp(tmpl, x);
1061 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1062 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 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 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 int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1145 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1147 sk->sk_policy[0] = NULL;
1148 sk->sk_policy[1] = NULL;
1149 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1150 return __xfrm_sk_clone_policy(sk, osk);
1154 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1156 static inline void xfrm_sk_free_policy(struct sock *sk)
1158 struct xfrm_policy *pol;
1160 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1161 if (unlikely(pol != NULL)) {
1162 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1163 sk->sk_policy[0] = NULL;
1165 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1166 if (unlikely(pol != NULL)) {
1167 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1168 sk->sk_policy[1] = NULL;
1172 void xfrm_garbage_collect(struct net *net);
1176 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1177 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1178 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1179 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1180 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1184 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1188 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1192 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1194 unsigned int family)
1198 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1199 struct sk_buff *skb)
1203 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1204 struct sk_buff *skb)
1208 static inline void xfrm_garbage_collect(struct net *net)
1214 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1218 return (xfrm_address_t *)&fl->u.ip4.daddr;
1220 return (xfrm_address_t *)&fl->u.ip6.daddr;
1226 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1230 return (xfrm_address_t *)&fl->u.ip4.saddr;
1232 return (xfrm_address_t *)&fl->u.ip6.saddr;
1238 void xfrm_flowi_addr_get(const struct flowi *fl,
1239 xfrm_address_t *saddr, xfrm_address_t *daddr,
1240 unsigned short family)
1244 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1245 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1248 saddr->in6 = fl->u.ip6.saddr;
1249 daddr->in6 = fl->u.ip6.daddr;
1254 static __inline__ int
1255 __xfrm4_state_addr_check(const struct xfrm_state *x,
1256 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1258 if (daddr->a4 == x->id.daddr.a4 &&
1259 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1264 static __inline__ int
1265 __xfrm6_state_addr_check(const struct xfrm_state *x,
1266 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1268 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1269 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1270 ipv6_addr_any((struct in6_addr *)saddr) ||
1271 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1276 static __inline__ int
1277 xfrm_state_addr_check(const struct xfrm_state *x,
1278 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1279 unsigned short family)
1283 return __xfrm4_state_addr_check(x, daddr, saddr);
1285 return __xfrm6_state_addr_check(x, daddr, saddr);
1290 static __inline__ int
1291 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1292 unsigned short family)
1296 return __xfrm4_state_addr_check(x,
1297 (const xfrm_address_t *)&fl->u.ip4.daddr,
1298 (const xfrm_address_t *)&fl->u.ip4.saddr);
1300 return __xfrm6_state_addr_check(x,
1301 (const xfrm_address_t *)&fl->u.ip6.daddr,
1302 (const xfrm_address_t *)&fl->u.ip6.saddr);
1307 static inline int xfrm_state_kern(const struct xfrm_state *x)
1309 return atomic_read(&x->tunnel_users);
1312 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1314 return (!userproto || proto == userproto ||
1315 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1316 proto == IPPROTO_ESP ||
1317 proto == IPPROTO_COMP)));
1321 * xfrm algorithm information
1323 struct xfrm_algo_aead_info {
1328 struct xfrm_algo_auth_info {
1333 struct xfrm_algo_encr_info {
1339 struct xfrm_algo_comp_info {
1343 struct xfrm_algo_desc {
1347 u8 pfkey_supported:1;
1349 struct xfrm_algo_aead_info aead;
1350 struct xfrm_algo_auth_info auth;
1351 struct xfrm_algo_encr_info encr;
1352 struct xfrm_algo_comp_info comp;
1354 struct sadb_alg desc;
1357 /* XFRM protocol handlers. */
1358 struct xfrm4_protocol {
1359 int (*handler)(struct sk_buff *skb);
1360 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1362 int (*cb_handler)(struct sk_buff *skb, int err);
1363 int (*err_handler)(struct sk_buff *skb, u32 info);
1365 struct xfrm4_protocol __rcu *next;
1369 struct xfrm6_protocol {
1370 int (*handler)(struct sk_buff *skb);
1371 int (*cb_handler)(struct sk_buff *skb, int err);
1372 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1373 u8 type, u8 code, int offset, __be32 info);
1375 struct xfrm6_protocol __rcu *next;
1379 /* XFRM tunnel handlers. */
1380 struct xfrm_tunnel {
1381 int (*handler)(struct sk_buff *skb);
1382 int (*err_handler)(struct sk_buff *skb, u32 info);
1384 struct xfrm_tunnel __rcu *next;
1388 struct xfrm6_tunnel {
1389 int (*handler)(struct sk_buff *skb);
1390 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1391 u8 type, u8 code, int offset, __be32 info);
1392 struct xfrm6_tunnel __rcu *next;
1396 void xfrm_init(void);
1397 void xfrm4_init(void);
1398 int xfrm_state_init(struct net *net);
1399 void xfrm_state_fini(struct net *net);
1400 void xfrm4_state_init(void);
1401 void xfrm4_protocol_init(void);
1403 int xfrm6_init(void);
1404 void xfrm6_fini(void);
1405 int xfrm6_state_init(void);
1406 void xfrm6_state_fini(void);
1407 int xfrm6_protocol_init(void);
1408 void xfrm6_protocol_fini(void);
1410 static inline int xfrm6_init(void)
1414 static inline void xfrm6_fini(void)
1420 #ifdef CONFIG_XFRM_STATISTICS
1421 int xfrm_proc_init(struct net *net);
1422 void xfrm_proc_fini(struct net *net);
1425 int xfrm_sysctl_init(struct net *net);
1426 #ifdef CONFIG_SYSCTL
1427 void xfrm_sysctl_fini(struct net *net);
1429 static inline void xfrm_sysctl_fini(struct net *net)
1434 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1435 struct xfrm_address_filter *filter);
1436 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1437 int (*func)(struct xfrm_state *, int, void*), void *);
1438 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1439 struct xfrm_state *xfrm_state_alloc(struct net *net);
1440 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1441 const xfrm_address_t *saddr,
1442 const struct flowi *fl,
1443 struct xfrm_tmpl *tmpl,
1444 struct xfrm_policy *pol, int *err,
1445 unsigned short family);
1446 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1447 xfrm_address_t *daddr,
1448 xfrm_address_t *saddr,
1449 unsigned short family,
1450 u8 mode, u8 proto, u32 reqid);
1451 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1452 unsigned short family);
1453 int xfrm_state_check_expire(struct xfrm_state *x);
1454 void xfrm_state_insert(struct xfrm_state *x);
1455 int xfrm_state_add(struct xfrm_state *x);
1456 int xfrm_state_update(struct xfrm_state *x);
1457 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1458 const xfrm_address_t *daddr, __be32 spi,
1459 u8 proto, unsigned short family);
1460 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1461 const xfrm_address_t *daddr,
1462 const xfrm_address_t *saddr,
1464 unsigned short family);
1465 #ifdef CONFIG_XFRM_SUB_POLICY
1466 int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1467 unsigned short family, struct net *net);
1468 int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1469 unsigned short family);
1471 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1472 int n, unsigned short family, struct net *net)
1477 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1478 int n, unsigned short family)
1484 struct xfrmk_sadinfo {
1485 u32 sadhcnt; /* current hash bkts */
1486 u32 sadhmcnt; /* max allowed hash bkts */
1487 u32 sadcnt; /* current running count */
1490 struct xfrmk_spdinfo {
1501 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1502 int xfrm_state_delete(struct xfrm_state *x);
1503 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid);
1504 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1505 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1506 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1507 int xfrm_init_replay(struct xfrm_state *x);
1508 int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1509 int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
1510 int xfrm_init_state(struct xfrm_state *x);
1511 int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1512 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1513 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1514 int xfrm_output_resume(struct sk_buff *skb, int err);
1515 int xfrm_output(struct sock *sk, struct sk_buff *skb);
1516 int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1517 void xfrm_local_error(struct sk_buff *skb, int mtu);
1518 int xfrm4_extract_header(struct sk_buff *skb);
1519 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1520 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1522 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1523 int xfrm4_rcv(struct sk_buff *skb);
1525 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1527 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1528 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1529 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1530 return xfrm_input(skb, nexthdr, spi, 0);
1533 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1534 int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1535 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1536 int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1537 int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1538 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1539 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1540 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1541 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1542 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1543 int xfrm6_extract_header(struct sk_buff *skb);
1544 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1545 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1547 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1548 int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1549 int xfrm6_rcv(struct sk_buff *skb);
1550 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1551 xfrm_address_t *saddr, u8 proto);
1552 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1553 int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1554 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1555 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1556 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1557 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1558 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1559 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1560 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1561 int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1562 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1563 int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1564 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1568 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1569 int xfrm_user_policy(struct sock *sk, int optname,
1570 u8 __user *optval, int optlen);
1572 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1574 return -ENOPROTOOPT;
1577 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1579 /* should not happen */
1585 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1587 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1588 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1589 int (*func)(struct xfrm_policy *, int, int, void*),
1591 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1592 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1593 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1595 struct xfrm_selector *sel,
1596 struct xfrm_sec_ctx *ctx, int delete,
1598 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir,
1599 u32 id, int delete, int *err);
1600 int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1601 void xfrm_policy_hash_rebuild(struct net *net);
1602 u32 xfrm_get_acqseq(void);
1603 int verify_spi_info(u8 proto, u32 min, u32 max);
1604 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1605 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1606 u8 mode, u32 reqid, u8 proto,
1607 const xfrm_address_t *daddr,
1608 const xfrm_address_t *saddr, int create,
1609 unsigned short family);
1610 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1612 #ifdef CONFIG_XFRM_MIGRATE
1613 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1614 const struct xfrm_migrate *m, int num_bundles,
1615 const struct xfrm_kmaddress *k);
1616 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1617 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1618 struct xfrm_migrate *m);
1619 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1620 struct xfrm_migrate *m, int num_bundles,
1621 struct xfrm_kmaddress *k, struct net *net);
1624 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1625 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1626 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1627 xfrm_address_t *addr);
1629 void xfrm_input_init(void);
1630 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1632 void xfrm_probe_algs(void);
1633 int xfrm_count_pfkey_auth_supported(void);
1634 int xfrm_count_pfkey_enc_supported(void);
1635 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1636 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1637 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1638 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1639 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1640 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1641 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1642 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1643 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1646 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1647 const xfrm_address_t *b)
1649 return ipv6_addr_equal((const struct in6_addr *)a,
1650 (const struct in6_addr *)b);
1653 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1654 const xfrm_address_t *b,
1660 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1662 return xfrm6_addr_equal(a, b);
1666 static inline int xfrm_policy_id2dir(u32 index)
1672 static inline int xfrm_aevent_is_on(struct net *net)
1678 nlsk = rcu_dereference(net->xfrm.nlsk);
1680 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1685 static inline int xfrm_acquire_is_on(struct net *net)
1691 nlsk = rcu_dereference(net->xfrm.nlsk);
1693 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1700 static inline int aead_len(struct xfrm_algo_aead *alg)
1702 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1705 static inline int xfrm_alg_len(const struct xfrm_algo *alg)
1707 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1710 static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1712 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1715 static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1717 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1720 #ifdef CONFIG_XFRM_MIGRATE
1721 static inline int xfrm_replay_clone(struct xfrm_state *x,
1722 struct xfrm_state *orig)
1724 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1729 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1730 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1732 x->preplay_esn = kmemdup(x->replay_esn,
1733 xfrm_replay_state_esn_len(x->replay_esn),
1735 if (!x->preplay_esn) {
1736 kfree(x->replay_esn);
1743 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1745 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1749 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1751 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1754 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1756 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1759 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1762 for (i = 0; i < n; i++)
1763 xfrm_state_put(*(states + i));
1766 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1769 for (i = 0; i < n; i++)
1770 xfrm_state_delete(*(states + i));
1775 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1777 return skb->sp->xvec[skb->sp->len - 1];
1781 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1783 if (attrs[XFRMA_MARK])
1784 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1791 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1796 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1800 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1801 unsigned int family)
1803 bool tunnel = false;
1807 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
1811 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
1815 if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL))
1820 #endif /* _NET_XFRM_H */