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))
57 /* Organization of SPD aka "XFRM rules"
58 ------------------------------------
61 - policy rule, struct xfrm_policy (=SPD entry)
62 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
63 - instance of a transformer, struct xfrm_state (=SA)
64 - template to clone xfrm_state, struct xfrm_tmpl
66 SPD is plain linear list of xfrm_policy rules, ordered by priority.
67 (To be compatible with existing pfkeyv2 implementations,
68 many rules with priority of 0x7fffffff are allowed to exist and
69 such rules are ordered in an unpredictable way, thanks to bsd folks.)
71 Lookup is plain linear search until the first match with selector.
73 If "action" is "block", then we prohibit the flow, otherwise:
74 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
75 policy entry has list of up to XFRM_MAX_DEPTH transformations,
76 described by templates xfrm_tmpl. Each template is resolved
77 to a complete xfrm_state (see below) and we pack bundle of transformations
78 to a dst_entry returned to requestor.
80 dst -. xfrm .-> xfrm_state #1
81 |---. child .-> dst -. xfrm .-> xfrm_state #2
82 |---. child .-> dst -. xfrm .-> xfrm_state #3
85 Bundles are cached at xrfm_policy struct (field ->bundles).
88 Resolution of xrfm_tmpl
89 -----------------------
91 1. ->mode Mode: transport or tunnel
92 2. ->id.proto Protocol: AH/ESP/IPCOMP
93 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
94 Q: allow to resolve security gateway?
95 4. ->id.spi If not zero, static SPI.
96 5. ->saddr Local tunnel endpoint, ignored for transport mode.
97 6. ->algos List of allowed algos. Plain bitmask now.
98 Q: ealgos, aalgos, calgos. What a mess...
99 7. ->share Sharing mode.
100 Q: how to implement private sharing mode? To add struct sock* to
103 Having this template we search through SAD searching for entries
104 with appropriate mode/proto/algo, permitted by selector.
105 If no appropriate entry found, it is requested from key manager.
108 Q: How to find all the bundles referring to a physical path for
109 PMTU discovery? Seems, dst should contain list of all parents...
110 and enter to infinite locking hierarchy disaster.
111 No! It is easier, we will not search for them, let them find us.
112 We add genid to each dst plus pointer to genid of raw IP route,
113 pmtu disc will update pmtu on raw IP route and increase its genid.
114 dst_check() will see this for top level and trigger resyncing
115 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
118 struct xfrm_state_walk {
119 struct list_head all;
124 struct xfrm_address_filter *filter;
127 /* Full description of state of transformer. */
133 struct hlist_node gclist;
134 struct hlist_node bydst;
136 struct hlist_node bysrc;
137 struct hlist_node byspi;
143 struct xfrm_selector sel;
144 struct xfrm_mark mark;
149 /* Key manager bits */
150 struct xfrm_state_walk km;
152 /* Parameters of this state. */
157 u8 aalgo, ealgo, calgo;
160 xfrm_address_t saddr;
166 struct xfrm_lifetime_cfg lft;
168 /* Data for transformer */
169 struct xfrm_algo_auth *aalg;
170 struct xfrm_algo *ealg;
171 struct xfrm_algo *calg;
172 struct xfrm_algo_aead *aead;
174 /* Data for encapsulator */
175 struct xfrm_encap_tmpl *encap;
177 /* Data for care-of address */
178 xfrm_address_t *coaddr;
180 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
181 struct xfrm_state *tunnel;
183 /* If a tunnel, number of users + 1 */
184 atomic_t tunnel_users;
186 /* State for replay detection */
187 struct xfrm_replay_state replay;
188 struct xfrm_replay_state_esn *replay_esn;
190 /* Replay detection state at the time we sent the last notification */
191 struct xfrm_replay_state preplay;
192 struct xfrm_replay_state_esn *preplay_esn;
194 /* The functions for replay detection. */
195 struct xfrm_replay *repl;
197 /* internal flag that only holds state for delayed aevent at the
202 /* Replay detection notification settings */
206 /* Replay detection notification timer */
207 struct timer_list rtimer;
210 struct xfrm_stats stats;
212 struct xfrm_lifetime_cur curlft;
213 struct tasklet_hrtimer mtimer;
215 /* used to fix curlft->add_time when changing date */
219 unsigned long lastused;
221 /* Reference to data common to all the instances of this
223 const struct xfrm_type *type;
224 struct xfrm_mode *inner_mode;
225 struct xfrm_mode *inner_mode_iaf;
226 struct xfrm_mode *outer_mode;
228 /* Security context */
229 struct xfrm_sec_ctx *security;
231 /* Private data of this transformer, format is opaque,
232 * interpreted by xfrm_type methods. */
236 static inline struct net *xs_net(struct xfrm_state *x)
238 return read_pnet(&x->xs_net);
241 /* xflags - make enum if more show up */
242 #define XFRM_TIME_DEFER 1
243 #define XFRM_SOFT_EXPIRE 2
254 /* callback structure passed from either netlink or pfkey */
271 void (*advance)(struct xfrm_state *x, __be32 net_seq);
272 int (*check)(struct xfrm_state *x,
275 int (*recheck)(struct xfrm_state *x,
278 void (*notify)(struct xfrm_state *x, int event);
279 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
285 struct xfrm_policy_afinfo {
286 unsigned short family;
287 struct dst_ops *dst_ops;
288 void (*garbage_collect)(struct net *net);
289 struct dst_entry *(*dst_lookup)(struct net *net, int tos,
290 const xfrm_address_t *saddr,
291 const xfrm_address_t *daddr);
292 int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr);
293 void (*decode_session)(struct sk_buff *skb,
296 int (*get_tos)(const struct flowi *fl);
297 void (*init_dst)(struct net *net,
298 struct xfrm_dst *dst);
299 int (*init_path)(struct xfrm_dst *path,
300 struct dst_entry *dst,
302 int (*fill_dst)(struct xfrm_dst *xdst,
303 struct net_device *dev,
304 const struct flowi *fl);
305 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
308 int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
309 int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
310 void km_policy_notify(struct xfrm_policy *xp, int dir,
311 const struct km_event *c);
312 void km_state_notify(struct xfrm_state *x, const struct km_event *c);
315 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
316 struct xfrm_policy *pol);
317 void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
318 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 sock *sk, 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 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
348 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
349 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
350 void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
352 struct xfrm_input_afinfo {
354 struct module *owner;
355 int (*callback)(struct sk_buff *skb, u8 protocol,
359 int xfrm_input_register_afinfo(struct xfrm_input_afinfo *afinfo);
360 int xfrm_input_unregister_afinfo(struct xfrm_input_afinfo *afinfo);
362 void xfrm_state_delete_tunnel(struct xfrm_state *x);
366 struct module *owner;
369 #define XFRM_TYPE_NON_FRAGMENT 1
370 #define XFRM_TYPE_REPLAY_PROT 2
371 #define XFRM_TYPE_LOCAL_COADDR 4
372 #define XFRM_TYPE_REMOTE_COADDR 8
374 int (*init_state)(struct xfrm_state *x);
375 void (*destructor)(struct xfrm_state *);
376 int (*input)(struct xfrm_state *, struct sk_buff *skb);
377 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
378 int (*reject)(struct xfrm_state *, struct sk_buff *,
379 const struct flowi *);
380 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
381 /* Estimate maximal size of result of transformation of a dgram */
382 u32 (*get_mtu)(struct xfrm_state *, int size);
385 int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
386 int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
390 * Remove encapsulation header.
392 * The IP header will be moved over the top of the encapsulation
395 * On entry, the transport header shall point to where the IP header
396 * should be and the network header shall be set to where the IP
397 * header currently is. skb->data shall point to the start of the
400 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
403 * This is the actual input entry point.
405 * For transport mode and equivalent this would be identical to
406 * input2 (which does not need to be set). While tunnel mode
407 * and equivalent would set this to the tunnel encapsulation function
408 * xfrm4_prepare_input that would in turn call input2.
410 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
413 * Add encapsulation header.
415 * On exit, the transport header will be set to the start of the
416 * encapsulation header to be filled in by x->type->output and
417 * the mac header will be set to the nextheader (protocol for
418 * IPv4) field of the extension header directly preceding the
419 * encapsulation header, or in its absence, that of the top IP
420 * header. The value of the network header will always point
421 * to the top IP header while skb->data will point to the payload.
423 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
426 * This is the actual output entry point.
428 * For transport mode and equivalent this would be identical to
429 * output2 (which does not need to be set). While tunnel mode
430 * and equivalent would set this to a tunnel encapsulation function
431 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
434 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
436 struct xfrm_state_afinfo *afinfo;
437 struct module *owner;
442 /* Flags for xfrm_mode. */
444 XFRM_MODE_FLAG_TUNNEL = 1,
447 int xfrm_register_mode(struct xfrm_mode *mode, int family);
448 int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
450 static inline int xfrm_af2proto(unsigned int family)
462 static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
464 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
465 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
466 return x->inner_mode;
468 return x->inner_mode_iaf;
472 /* id in template is interpreted as:
473 * daddr - destination of tunnel, may be zero for transport mode.
474 * spi - zero to acquire spi. Not zero if spi is static, then
475 * daddr must be fixed too.
476 * proto - AH/ESP/IPCOMP
480 /* Source address of tunnel. Ignored, if it is not a tunnel. */
481 xfrm_address_t saddr;
483 unsigned short encap_family;
487 /* Mode: transport, tunnel etc. */
490 /* Sharing mode: unique, this session only, this user only etc. */
493 /* May skip this transfomration if no SA is found */
496 /* Skip aalgos/ealgos/calgos checks. */
499 /* Bit mask of algos allowed for acquisition */
505 #define XFRM_MAX_DEPTH 6
507 struct xfrm_policy_walk_entry {
508 struct list_head all;
512 struct xfrm_policy_walk {
513 struct xfrm_policy_walk_entry walk;
518 struct xfrm_policy_queue {
519 struct sk_buff_head hold_queue;
520 struct timer_list hold_timer;
521 unsigned long timeout;
528 struct hlist_node bydst;
529 struct hlist_node byidx;
531 /* This lock only affects elements except for entry. */
534 struct timer_list timer;
536 struct flow_cache_object flo;
540 struct xfrm_mark mark;
541 struct xfrm_selector selector;
542 struct xfrm_lifetime_cfg lft;
543 struct xfrm_lifetime_cur curlft;
544 struct xfrm_policy_walk_entry walk;
545 struct xfrm_policy_queue polq;
551 struct xfrm_sec_ctx *security;
552 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
555 static inline struct net *xp_net(const struct xfrm_policy *xp)
557 return read_pnet(&xp->xp_net);
560 struct xfrm_kmaddress {
561 xfrm_address_t local;
562 xfrm_address_t remote;
567 struct xfrm_migrate {
568 xfrm_address_t old_daddr;
569 xfrm_address_t old_saddr;
570 xfrm_address_t new_daddr;
571 xfrm_address_t new_saddr;
580 #define XFRM_KM_TIMEOUT 30
582 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
583 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
585 /* default aevent timeout in units of 100ms */
586 #define XFRM_AE_ETIME 10
587 /* Async Event timer multiplier */
588 #define XFRM_AE_ETH_M 10
589 /* default seq threshold size */
590 #define XFRM_AE_SEQT_SIZE 2
593 struct list_head list;
595 int (*notify)(struct xfrm_state *x, const struct km_event *c);
596 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
597 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
598 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
599 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
600 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
601 int (*migrate)(const struct xfrm_selector *sel,
603 const struct xfrm_migrate *m,
605 const struct xfrm_kmaddress *k);
606 bool (*is_alive)(const struct km_event *c);
609 int xfrm_register_km(struct xfrm_mgr *km);
610 int xfrm_unregister_km(struct xfrm_mgr *km);
612 struct xfrm_tunnel_skb_cb {
614 struct inet_skb_parm h4;
615 struct inet6_skb_parm h6;
619 struct ip_tunnel *ip4;
624 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
627 * This structure is used for the duration where packets are being
628 * transformed by IPsec. As soon as the packet leaves IPsec the
629 * area beyond the generic IP part may be overwritten.
632 struct xfrm_tunnel_skb_cb header;
634 /* Sequence number for replay protection. */
647 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
650 * This structure is used by the afinfo prepare_input/prepare_output functions
651 * to transmit header information to the mode input/output functions.
653 struct xfrm_mode_skb_cb {
654 struct xfrm_tunnel_skb_cb header;
656 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
660 /* IP header length (excluding options or extension headers). */
663 /* TOS for IPv4, class for IPv6. */
666 /* TTL for IPv4, hop limitfor IPv6. */
669 /* Protocol for IPv4, NH for IPv6. */
672 /* Option length for IPv4, zero for IPv6. */
675 /* Used by IPv6 only, zero for IPv4. */
679 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
682 * This structure is used by the input processing to locate the SPI and
683 * related information.
685 struct xfrm_spi_skb_cb {
686 struct xfrm_tunnel_skb_cb header;
688 unsigned int daddroff;
692 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
694 /* Audit Information */
697 unsigned int sessionid;
700 #ifdef CONFIG_AUDITSYSCALL
701 static inline struct audit_buffer *xfrm_audit_start(const char *op)
703 struct audit_buffer *audit_buf = NULL;
705 if (audit_enabled == 0)
707 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
708 AUDIT_MAC_IPSEC_EVENT);
709 if (audit_buf == NULL)
711 audit_log_format(audit_buf, "op=%s", op);
715 static inline void xfrm_audit_helper_usrinfo(kuid_t auid, unsigned int ses,
716 struct audit_buffer *audit_buf)
718 audit_log_format(audit_buf, " auid=%u ses=%u",
719 from_kuid(&init_user_ns, auid), ses);
720 audit_log_task_context(audit_buf);
723 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, kuid_t auid,
725 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, kuid_t auid,
727 void xfrm_audit_state_add(struct xfrm_state *x, int result, kuid_t auid,
729 void xfrm_audit_state_delete(struct xfrm_state *x, int result, kuid_t auid,
731 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
732 struct sk_buff *skb);
733 void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
735 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
736 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
738 void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
742 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
743 kuid_t auid, unsigned int ses)
747 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
748 kuid_t auid, unsigned int ses)
752 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
753 kuid_t auid, unsigned int ses)
757 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
758 kuid_t auid, unsigned int ses)
762 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
767 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
768 struct sk_buff *skb, __be32 net_seq)
772 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
777 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
778 __be32 net_spi, __be32 net_seq)
782 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
783 struct sk_buff *skb, u8 proto)
786 #endif /* CONFIG_AUDITSYSCALL */
788 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
790 if (likely(policy != NULL))
791 atomic_inc(&policy->refcnt);
794 void xfrm_policy_destroy(struct xfrm_policy *policy);
796 static inline void xfrm_pol_put(struct xfrm_policy *policy)
798 if (atomic_dec_and_test(&policy->refcnt))
799 xfrm_policy_destroy(policy);
802 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
805 for (i = npols - 1; i >= 0; --i)
806 xfrm_pol_put(pols[i]);
809 void __xfrm_state_destroy(struct xfrm_state *);
811 static inline void __xfrm_state_put(struct xfrm_state *x)
813 atomic_dec(&x->refcnt);
816 static inline void xfrm_state_put(struct xfrm_state *x)
818 if (atomic_dec_and_test(&x->refcnt))
819 __xfrm_state_destroy(x);
822 static inline void xfrm_state_hold(struct xfrm_state *x)
824 atomic_inc(&x->refcnt);
827 static inline bool addr_match(const void *token1, const void *token2,
830 const __be32 *a1 = token1;
831 const __be32 *a2 = token2;
835 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
836 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
839 if (memcmp(a1, a2, pdw << 2))
845 mask = htonl((0xffffffff) << (32 - pbi));
847 if ((a1[pdw] ^ a2[pdw]) & mask)
854 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
856 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
859 return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen)));
863 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
866 switch(fl->flowi_proto) {
869 case IPPROTO_UDPLITE:
871 port = uli->ports.sport;
875 port = htons(uli->icmpt.type);
878 port = htons(uli->mht.type);
881 port = htons(ntohl(uli->gre_key) >> 16);
890 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
893 switch(fl->flowi_proto) {
896 case IPPROTO_UDPLITE:
898 port = uli->ports.dport;
902 port = htons(uli->icmpt.code);
905 port = htons(ntohl(uli->gre_key) & 0xffff);
913 bool xfrm_selector_match(const struct xfrm_selector *sel,
914 const struct flowi *fl, unsigned short family);
916 #ifdef CONFIG_SECURITY_NETWORK_XFRM
917 /* If neither has a context --> match
918 * Otherwise, both must have a context and the sids, doi, alg must match
920 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
922 return ((!s1 && !s2) ||
924 (s1->ctx_sid == s2->ctx_sid) &&
925 (s1->ctx_doi == s2->ctx_doi) &&
926 (s1->ctx_alg == s2->ctx_alg)));
929 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
935 /* A struct encoding bundle of transformations to apply to some set of flow.
937 * dst->child points to the next element of bundle.
938 * dst->xfrm points to an instanse of transformer.
940 * Due to unfortunate limitations of current routing cache, which we
941 * have no time to fix, it mirrors struct rtable and bound to the same
942 * routing key, including saddr,daddr. However, we can have many of
943 * bundles differing by session id. All the bundles grow from a parent
948 struct dst_entry dst;
952 struct dst_entry *route;
953 struct flow_cache_object flo;
954 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
955 int num_pols, num_xfrms;
956 #ifdef CONFIG_XFRM_SUB_POLICY
957 struct flowi *origin;
958 struct xfrm_selector *partner;
962 u32 route_mtu_cached;
963 u32 child_mtu_cached;
969 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
971 xfrm_pols_put(xdst->pols, xdst->num_pols);
972 dst_release(xdst->route);
973 if (likely(xdst->u.dst.xfrm))
974 xfrm_state_put(xdst->u.dst.xfrm);
975 #ifdef CONFIG_XFRM_SUB_POLICY
978 kfree(xdst->partner);
979 xdst->partner = NULL;
984 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
989 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
992 static inline int secpath_exists(struct sk_buff *skb)
995 return skb->sp != NULL;
1001 static inline struct sec_path *
1002 secpath_get(struct sec_path *sp)
1005 atomic_inc(&sp->refcnt);
1009 void __secpath_destroy(struct sec_path *sp);
1012 secpath_put(struct sec_path *sp)
1014 if (sp && atomic_dec_and_test(&sp->refcnt))
1015 __secpath_destroy(sp);
1018 struct sec_path *secpath_dup(struct sec_path *src);
1021 secpath_reset(struct sk_buff *skb)
1024 secpath_put(skb->sp);
1030 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1034 return addr->a4 == 0;
1036 return ipv6_addr_any((struct in6_addr *)&addr->a6);
1042 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1044 return (tmpl->saddr.a4 &&
1045 tmpl->saddr.a4 != x->props.saddr.a4);
1049 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1051 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1052 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1056 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1060 return __xfrm4_state_addr_cmp(tmpl, x);
1062 return __xfrm6_state_addr_cmp(tmpl, x);
1068 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1069 unsigned short family);
1071 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1072 struct sk_buff *skb,
1073 unsigned int family, int reverse)
1075 struct net *net = dev_net(skb->dev);
1076 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1078 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1079 return __xfrm_policy_check(sk, ndir, skb, family);
1081 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
1082 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1083 __xfrm_policy_check(sk, ndir, skb, family);
1086 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1088 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1091 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1093 return xfrm_policy_check(sk, dir, skb, AF_INET);
1096 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1098 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1101 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1102 struct sk_buff *skb)
1104 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1107 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1108 struct sk_buff *skb)
1110 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1113 int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1114 unsigned int family, int reverse);
1116 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1117 unsigned int family)
1119 return __xfrm_decode_session(skb, fl, family, 0);
1122 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1124 unsigned int family)
1126 return __xfrm_decode_session(skb, fl, family, 1);
1129 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1131 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1133 struct net *net = dev_net(skb->dev);
1135 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1136 (skb_dst(skb)->flags & DST_NOXFRM) ||
1137 __xfrm_route_forward(skb, family);
1140 static inline int xfrm4_route_forward(struct sk_buff *skb)
1142 return xfrm_route_forward(skb, AF_INET);
1145 static inline int xfrm6_route_forward(struct sk_buff *skb)
1147 return xfrm_route_forward(skb, AF_INET6);
1150 int __xfrm_sk_clone_policy(struct sock *sk);
1152 static inline int xfrm_sk_clone_policy(struct sock *sk)
1154 if (unlikely(sk->sk_policy[0] || sk->sk_policy[1]))
1155 return __xfrm_sk_clone_policy(sk);
1159 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1161 static inline void xfrm_sk_free_policy(struct sock *sk)
1163 if (unlikely(sk->sk_policy[0] != NULL)) {
1164 xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX);
1165 sk->sk_policy[0] = NULL;
1167 if (unlikely(sk->sk_policy[1] != NULL)) {
1168 xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1);
1169 sk->sk_policy[1] = NULL;
1173 void xfrm_garbage_collect(struct net *net);
1177 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1178 static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; }
1179 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1180 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1181 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1185 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1189 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1193 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1195 unsigned int family)
1199 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1200 struct sk_buff *skb)
1204 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1205 struct sk_buff *skb)
1209 static inline void xfrm_garbage_collect(struct net *net)
1215 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1219 return (xfrm_address_t *)&fl->u.ip4.daddr;
1221 return (xfrm_address_t *)&fl->u.ip6.daddr;
1227 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1231 return (xfrm_address_t *)&fl->u.ip4.saddr;
1233 return (xfrm_address_t *)&fl->u.ip6.saddr;
1239 void xfrm_flowi_addr_get(const struct flowi *fl,
1240 xfrm_address_t *saddr, xfrm_address_t *daddr,
1241 unsigned short family)
1245 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1246 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1249 *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr;
1250 *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr;
1255 static __inline__ int
1256 __xfrm4_state_addr_check(const struct xfrm_state *x,
1257 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1259 if (daddr->a4 == x->id.daddr.a4 &&
1260 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1265 static __inline__ int
1266 __xfrm6_state_addr_check(const struct xfrm_state *x,
1267 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1269 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1270 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1271 ipv6_addr_any((struct in6_addr *)saddr) ||
1272 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1277 static __inline__ int
1278 xfrm_state_addr_check(const struct xfrm_state *x,
1279 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1280 unsigned short family)
1284 return __xfrm4_state_addr_check(x, daddr, saddr);
1286 return __xfrm6_state_addr_check(x, daddr, saddr);
1291 static __inline__ int
1292 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1293 unsigned short family)
1297 return __xfrm4_state_addr_check(x,
1298 (const xfrm_address_t *)&fl->u.ip4.daddr,
1299 (const xfrm_address_t *)&fl->u.ip4.saddr);
1301 return __xfrm6_state_addr_check(x,
1302 (const xfrm_address_t *)&fl->u.ip6.daddr,
1303 (const xfrm_address_t *)&fl->u.ip6.saddr);
1308 static inline int xfrm_state_kern(const struct xfrm_state *x)
1310 return atomic_read(&x->tunnel_users);
1313 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1315 return (!userproto || proto == userproto ||
1316 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1317 proto == IPPROTO_ESP ||
1318 proto == IPPROTO_COMP)));
1322 * xfrm algorithm information
1324 struct xfrm_algo_aead_info {
1328 struct xfrm_algo_auth_info {
1333 struct xfrm_algo_encr_info {
1338 struct xfrm_algo_comp_info {
1342 struct xfrm_algo_desc {
1346 u8 pfkey_supported:1;
1348 struct xfrm_algo_aead_info aead;
1349 struct xfrm_algo_auth_info auth;
1350 struct xfrm_algo_encr_info encr;
1351 struct xfrm_algo_comp_info comp;
1353 struct sadb_alg desc;
1356 /* XFRM protocol handlers. */
1357 struct xfrm4_protocol {
1358 int (*handler)(struct sk_buff *skb);
1359 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1361 int (*cb_handler)(struct sk_buff *skb, int err);
1362 int (*err_handler)(struct sk_buff *skb, u32 info);
1364 struct xfrm4_protocol __rcu *next;
1368 struct xfrm6_protocol {
1369 int (*handler)(struct sk_buff *skb);
1370 int (*cb_handler)(struct sk_buff *skb, int err);
1371 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1372 u8 type, u8 code, int offset, __be32 info);
1374 struct xfrm6_protocol __rcu *next;
1378 /* XFRM tunnel handlers. */
1379 struct xfrm_tunnel {
1380 int (*handler)(struct sk_buff *skb);
1381 int (*err_handler)(struct sk_buff *skb, u32 info);
1383 struct xfrm_tunnel __rcu *next;
1387 struct xfrm6_tunnel {
1388 int (*handler)(struct sk_buff *skb);
1389 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1390 u8 type, u8 code, int offset, __be32 info);
1391 struct xfrm6_tunnel __rcu *next;
1395 void xfrm_init(void);
1396 void xfrm4_init(void);
1397 int xfrm_state_init(struct net *net);
1398 void xfrm_state_fini(struct net *net);
1399 void xfrm4_state_init(void);
1400 void xfrm4_protocol_init(void);
1402 int xfrm6_init(void);
1403 void xfrm6_fini(void);
1404 int xfrm6_state_init(void);
1405 void xfrm6_state_fini(void);
1406 int xfrm6_protocol_init(void);
1407 void xfrm6_protocol_fini(void);
1409 static inline int xfrm6_init(void)
1413 static inline void xfrm6_fini(void)
1419 #ifdef CONFIG_XFRM_STATISTICS
1420 int xfrm_proc_init(struct net *net);
1421 void xfrm_proc_fini(struct net *net);
1424 int xfrm_sysctl_init(struct net *net);
1425 #ifdef CONFIG_SYSCTL
1426 void xfrm_sysctl_fini(struct net *net);
1428 static inline void xfrm_sysctl_fini(struct net *net)
1433 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1434 struct xfrm_address_filter *filter);
1435 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1436 int (*func)(struct xfrm_state *, int, void*), void *);
1437 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1438 struct xfrm_state *xfrm_state_alloc(struct net *net);
1439 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1440 const xfrm_address_t *saddr,
1441 const struct flowi *fl,
1442 struct xfrm_tmpl *tmpl,
1443 struct xfrm_policy *pol, int *err,
1444 unsigned short family);
1445 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1446 xfrm_address_t *daddr,
1447 xfrm_address_t *saddr,
1448 unsigned short family,
1449 u8 mode, u8 proto, u32 reqid);
1450 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1451 unsigned short family);
1452 int xfrm_state_check_expire(struct xfrm_state *x);
1453 void xfrm_state_insert(struct xfrm_state *x);
1454 int xfrm_state_add(struct xfrm_state *x);
1455 int xfrm_state_update(struct xfrm_state *x);
1456 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1457 const xfrm_address_t *daddr, __be32 spi,
1458 u8 proto, unsigned short family);
1459 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1460 const xfrm_address_t *daddr,
1461 const xfrm_address_t *saddr,
1463 unsigned short family);
1464 #ifdef CONFIG_XFRM_SUB_POLICY
1465 int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1466 unsigned short family, struct net *net);
1467 int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1468 unsigned short family);
1470 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1471 int n, unsigned short family, struct net *net)
1476 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1477 int n, unsigned short family)
1483 struct xfrmk_sadinfo {
1484 u32 sadhcnt; /* current hash bkts */
1485 u32 sadhmcnt; /* max allowed hash bkts */
1486 u32 sadcnt; /* current running count */
1489 struct xfrmk_spdinfo {
1500 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1501 int xfrm_state_delete(struct xfrm_state *x);
1502 int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info);
1503 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1504 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1505 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1506 int xfrm_init_replay(struct xfrm_state *x);
1507 int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1508 int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
1509 int xfrm_init_state(struct xfrm_state *x);
1510 int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1511 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1512 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1513 int xfrm_output_resume(struct sk_buff *skb, int err);
1514 int xfrm_output(struct sk_buff *skb);
1515 int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1516 void xfrm_local_error(struct sk_buff *skb, int mtu);
1517 int xfrm4_extract_header(struct sk_buff *skb);
1518 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1519 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1521 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1522 int xfrm4_rcv(struct sk_buff *skb);
1524 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1526 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1527 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1528 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1529 return xfrm_input(skb, nexthdr, spi, 0);
1532 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1533 int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1534 int xfrm4_output(struct sock *sk, struct sk_buff *skb);
1535 int xfrm4_output_finish(struct sk_buff *skb);
1536 int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1537 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1538 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1539 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1540 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1541 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1542 int xfrm6_extract_header(struct sk_buff *skb);
1543 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1544 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi);
1545 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1546 int xfrm6_rcv(struct sk_buff *skb);
1547 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1548 xfrm_address_t *saddr, u8 proto);
1549 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1550 int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1551 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1552 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1553 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1554 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1555 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1556 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1557 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1558 int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1559 int xfrm6_output(struct sock *sk, struct sk_buff *skb);
1560 int xfrm6_output_finish(struct sk_buff *skb);
1561 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1565 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1566 int xfrm_user_policy(struct sock *sk, int optname,
1567 u8 __user *optval, int optlen);
1569 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1571 return -ENOPROTOOPT;
1574 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1576 /* should not happen */
1582 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1584 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1585 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1586 int (*func)(struct xfrm_policy *, int, int, void*),
1588 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1589 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1590 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1592 struct xfrm_selector *sel,
1593 struct xfrm_sec_ctx *ctx, int delete,
1595 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir,
1596 u32 id, int delete, int *err);
1597 int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info);
1598 u32 xfrm_get_acqseq(void);
1599 int verify_spi_info(u8 proto, u32 min, u32 max);
1600 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1601 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1602 u8 mode, u32 reqid, u8 proto,
1603 const xfrm_address_t *daddr,
1604 const xfrm_address_t *saddr, int create,
1605 unsigned short family);
1606 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1608 #ifdef CONFIG_XFRM_MIGRATE
1609 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1610 const struct xfrm_migrate *m, int num_bundles,
1611 const struct xfrm_kmaddress *k);
1612 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1613 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1614 struct xfrm_migrate *m);
1615 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1616 struct xfrm_migrate *m, int num_bundles,
1617 struct xfrm_kmaddress *k, struct net *net);
1620 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1621 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1622 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1623 xfrm_address_t *addr);
1625 void xfrm_input_init(void);
1626 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1628 void xfrm_probe_algs(void);
1629 int xfrm_count_pfkey_auth_supported(void);
1630 int xfrm_count_pfkey_enc_supported(void);
1631 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1632 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1633 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1634 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1635 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1636 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1637 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1638 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1639 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1642 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1643 const xfrm_address_t *b)
1645 return ipv6_addr_equal((const struct in6_addr *)a,
1646 (const struct in6_addr *)b);
1649 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1650 const xfrm_address_t *b,
1656 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1658 return xfrm6_addr_equal(a, b);
1662 static inline int xfrm_policy_id2dir(u32 index)
1668 static inline int xfrm_aevent_is_on(struct net *net)
1674 nlsk = rcu_dereference(net->xfrm.nlsk);
1676 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1681 static inline int xfrm_acquire_is_on(struct net *net)
1687 nlsk = rcu_dereference(net->xfrm.nlsk);
1689 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1696 static inline int aead_len(struct xfrm_algo_aead *alg)
1698 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1701 static inline int xfrm_alg_len(const struct xfrm_algo *alg)
1703 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1706 static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1708 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1711 static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1713 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1716 #ifdef CONFIG_XFRM_MIGRATE
1717 static inline int xfrm_replay_clone(struct xfrm_state *x,
1718 struct xfrm_state *orig)
1720 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1725 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1726 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1728 x->preplay_esn = kmemdup(x->replay_esn,
1729 xfrm_replay_state_esn_len(x->replay_esn),
1731 if (!x->preplay_esn) {
1732 kfree(x->replay_esn);
1739 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1741 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1745 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1747 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1750 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1752 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1755 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1758 for (i = 0; i < n; i++)
1759 xfrm_state_put(*(states + i));
1762 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1765 for (i = 0; i < n; i++)
1766 xfrm_state_delete(*(states + i));
1771 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1773 return skb->sp->xvec[skb->sp->len - 1];
1777 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1779 if (attrs[XFRMA_MARK])
1780 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1787 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1792 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1796 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1797 unsigned int family)
1799 bool tunnel = false;
1803 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
1807 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
1811 if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL))
1816 #endif /* _NET_XFRM_H */