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 struct xfrm_state_offload {
124 struct net_device *dev;
125 unsigned long offload_handle;
126 unsigned int num_exthdrs;
130 /* Full description of state of transformer. */
132 possible_net_t xs_net;
134 struct hlist_node gclist;
135 struct hlist_node bydst;
137 struct hlist_node bysrc;
138 struct hlist_node byspi;
144 struct xfrm_selector sel;
145 struct xfrm_mark mark;
150 /* Key manager bits */
151 struct xfrm_state_walk km;
153 /* Parameters of this state. */
158 u8 aalgo, ealgo, calgo;
161 xfrm_address_t saddr;
167 struct xfrm_lifetime_cfg lft;
169 /* Data for transformer */
170 struct xfrm_algo_auth *aalg;
171 struct xfrm_algo *ealg;
172 struct xfrm_algo *calg;
173 struct xfrm_algo_aead *aead;
176 /* Data for encapsulator */
177 struct xfrm_encap_tmpl *encap;
179 /* Data for care-of address */
180 xfrm_address_t *coaddr;
182 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
183 struct xfrm_state *tunnel;
185 /* If a tunnel, number of users + 1 */
186 atomic_t tunnel_users;
188 /* State for replay detection */
189 struct xfrm_replay_state replay;
190 struct xfrm_replay_state_esn *replay_esn;
192 /* Replay detection state at the time we sent the last notification */
193 struct xfrm_replay_state preplay;
194 struct xfrm_replay_state_esn *preplay_esn;
196 /* The functions for replay detection. */
197 const struct xfrm_replay *repl;
199 /* internal flag that only holds state for delayed aevent at the
204 /* Replay detection notification settings */
208 /* Replay detection notification timer */
209 struct timer_list rtimer;
212 struct xfrm_stats stats;
214 struct xfrm_lifetime_cur curlft;
215 struct tasklet_hrtimer mtimer;
217 struct xfrm_state_offload xso;
219 /* used to fix curlft->add_time when changing date */
223 unsigned long lastused;
225 struct page_frag xfrag;
227 /* Reference to data common to all the instances of this
229 const struct xfrm_type *type;
230 struct xfrm_mode *inner_mode;
231 struct xfrm_mode *inner_mode_iaf;
232 struct xfrm_mode *outer_mode;
234 const struct xfrm_type_offload *type_offload;
236 /* Security context */
237 struct xfrm_sec_ctx *security;
239 /* Private data of this transformer, format is opaque,
240 * interpreted by xfrm_type methods. */
244 static inline struct net *xs_net(struct xfrm_state *x)
246 return read_pnet(&x->xs_net);
249 /* xflags - make enum if more show up */
250 #define XFRM_TIME_DEFER 1
251 #define XFRM_SOFT_EXPIRE 2
262 /* callback structure passed from either netlink or pfkey */
279 void (*advance)(struct xfrm_state *x, __be32 net_seq);
280 int (*check)(struct xfrm_state *x,
283 int (*recheck)(struct xfrm_state *x,
286 void (*notify)(struct xfrm_state *x, int event);
287 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
293 struct xfrm_policy_afinfo {
294 struct dst_ops *dst_ops;
295 struct dst_entry *(*dst_lookup)(struct net *net,
297 const xfrm_address_t *saddr,
298 const xfrm_address_t *daddr);
299 int (*get_saddr)(struct net *net, int oif,
300 xfrm_address_t *saddr,
301 xfrm_address_t *daddr);
302 void (*decode_session)(struct sk_buff *skb,
305 int (*get_tos)(const struct flowi *fl);
306 int (*init_path)(struct xfrm_dst *path,
307 struct dst_entry *dst,
309 int (*fill_dst)(struct xfrm_dst *xdst,
310 struct net_device *dev,
311 const struct flowi *fl);
312 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
315 int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family);
316 void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo);
317 void km_policy_notify(struct xfrm_policy *xp, int dir,
318 const struct km_event *c);
319 void km_state_notify(struct xfrm_state *x, const struct km_event *c);
322 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
323 struct xfrm_policy *pol);
324 void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
325 int __xfrm_state_delete(struct xfrm_state *x);
327 struct xfrm_state_afinfo {
331 struct module *owner;
332 const struct xfrm_type *type_map[IPPROTO_MAX];
333 const struct xfrm_type_offload *type_offload_map[IPPROTO_MAX];
334 struct xfrm_mode *mode_map[XFRM_MODE_MAX];
336 int (*init_flags)(struct xfrm_state *x);
337 void (*init_tempsel)(struct xfrm_selector *sel,
338 const struct flowi *fl);
339 void (*init_temprop)(struct xfrm_state *x,
340 const struct xfrm_tmpl *tmpl,
341 const xfrm_address_t *daddr,
342 const xfrm_address_t *saddr);
343 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
344 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
345 int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
346 int (*output_finish)(struct sock *sk, struct sk_buff *skb);
347 int (*extract_input)(struct xfrm_state *x,
348 struct sk_buff *skb);
349 int (*extract_output)(struct xfrm_state *x,
350 struct sk_buff *skb);
351 int (*transport_finish)(struct sk_buff *skb,
353 void (*local_error)(struct sk_buff *skb, u32 mtu);
356 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
357 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
358 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
359 struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family);
361 struct xfrm_input_afinfo {
363 int (*callback)(struct sk_buff *skb, u8 protocol,
367 int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo);
368 int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo);
370 void xfrm_state_delete_tunnel(struct xfrm_state *x);
374 struct module *owner;
377 #define XFRM_TYPE_NON_FRAGMENT 1
378 #define XFRM_TYPE_REPLAY_PROT 2
379 #define XFRM_TYPE_LOCAL_COADDR 4
380 #define XFRM_TYPE_REMOTE_COADDR 8
382 int (*init_state)(struct xfrm_state *x);
383 void (*destructor)(struct xfrm_state *);
384 int (*input)(struct xfrm_state *, struct sk_buff *skb);
385 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
386 int (*reject)(struct xfrm_state *, struct sk_buff *,
387 const struct flowi *);
388 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
389 /* Estimate maximal size of result of transformation of a dgram */
390 u32 (*get_mtu)(struct xfrm_state *, int size);
393 int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
394 int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
396 struct xfrm_type_offload {
398 struct module *owner;
400 void (*encap)(struct xfrm_state *, struct sk_buff *pskb);
401 int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb);
402 int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features);
405 int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family);
406 int xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family);
410 * Remove encapsulation header.
412 * The IP header will be moved over the top of the encapsulation
415 * On entry, the transport header shall point to where the IP header
416 * should be and the network header shall be set to where the IP
417 * header currently is. skb->data shall point to the start of the
420 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
423 * This is the actual input entry point.
425 * For transport mode and equivalent this would be identical to
426 * input2 (which does not need to be set). While tunnel mode
427 * and equivalent would set this to the tunnel encapsulation function
428 * xfrm4_prepare_input that would in turn call input2.
430 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
433 * Add encapsulation header.
435 * On exit, the transport header will be set to the start of the
436 * encapsulation header to be filled in by x->type->output and
437 * the mac header will be set to the nextheader (protocol for
438 * IPv4) field of the extension header directly preceding the
439 * encapsulation header, or in its absence, that of the top IP
440 * header. The value of the network header will always point
441 * to the top IP header while skb->data will point to the payload.
443 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
446 * This is the actual output entry point.
448 * For transport mode and equivalent this would be identical to
449 * output2 (which does not need to be set). While tunnel mode
450 * and equivalent would set this to a tunnel encapsulation function
451 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
454 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
457 * Adjust pointers into the packet and do GSO segmentation.
459 struct sk_buff *(*gso_segment)(struct xfrm_state *x, struct sk_buff *skb, netdev_features_t features);
462 * Adjust pointers into the packet when IPsec is done at layer2.
464 void (*xmit)(struct xfrm_state *x, struct sk_buff *skb);
466 struct xfrm_state_afinfo *afinfo;
467 struct module *owner;
472 /* Flags for xfrm_mode. */
474 XFRM_MODE_FLAG_TUNNEL = 1,
477 int xfrm_register_mode(struct xfrm_mode *mode, int family);
478 int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
480 static inline int xfrm_af2proto(unsigned int family)
492 static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
494 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
495 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
496 return x->inner_mode;
498 return x->inner_mode_iaf;
502 /* id in template is interpreted as:
503 * daddr - destination of tunnel, may be zero for transport mode.
504 * spi - zero to acquire spi. Not zero if spi is static, then
505 * daddr must be fixed too.
506 * proto - AH/ESP/IPCOMP
510 /* Source address of tunnel. Ignored, if it is not a tunnel. */
511 xfrm_address_t saddr;
513 unsigned short encap_family;
517 /* Mode: transport, tunnel etc. */
520 /* Sharing mode: unique, this session only, this user only etc. */
523 /* May skip this transfomration if no SA is found */
526 /* Skip aalgos/ealgos/calgos checks. */
529 /* Bit mask of algos allowed for acquisition */
535 #define XFRM_MAX_DEPTH 6
536 #define XFRM_MAX_OFFLOAD_DEPTH 1
538 struct xfrm_policy_walk_entry {
539 struct list_head all;
543 struct xfrm_policy_walk {
544 struct xfrm_policy_walk_entry walk;
549 struct xfrm_policy_queue {
550 struct sk_buff_head hold_queue;
551 struct timer_list hold_timer;
552 unsigned long timeout;
556 possible_net_t xp_net;
557 struct hlist_node bydst;
558 struct hlist_node byidx;
560 /* This lock only affects elements except for entry. */
563 struct timer_list timer;
565 struct flow_cache_object flo;
569 struct xfrm_mark mark;
570 struct xfrm_selector selector;
571 struct xfrm_lifetime_cfg lft;
572 struct xfrm_lifetime_cur curlft;
573 struct xfrm_policy_walk_entry walk;
574 struct xfrm_policy_queue polq;
580 struct xfrm_sec_ctx *security;
581 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
585 static inline struct net *xp_net(const struct xfrm_policy *xp)
587 return read_pnet(&xp->xp_net);
590 struct xfrm_kmaddress {
591 xfrm_address_t local;
592 xfrm_address_t remote;
597 struct xfrm_migrate {
598 xfrm_address_t old_daddr;
599 xfrm_address_t old_saddr;
600 xfrm_address_t new_daddr;
601 xfrm_address_t new_saddr;
610 #define XFRM_KM_TIMEOUT 30
612 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
613 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
615 /* default aevent timeout in units of 100ms */
616 #define XFRM_AE_ETIME 10
617 /* Async Event timer multiplier */
618 #define XFRM_AE_ETH_M 10
619 /* default seq threshold size */
620 #define XFRM_AE_SEQT_SIZE 2
623 struct list_head list;
624 int (*notify)(struct xfrm_state *x, const struct km_event *c);
625 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
626 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
627 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
628 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
629 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
630 int (*migrate)(const struct xfrm_selector *sel,
632 const struct xfrm_migrate *m,
634 const struct xfrm_kmaddress *k);
635 bool (*is_alive)(const struct km_event *c);
638 int xfrm_register_km(struct xfrm_mgr *km);
639 int xfrm_unregister_km(struct xfrm_mgr *km);
641 struct xfrm_tunnel_skb_cb {
643 struct inet_skb_parm h4;
644 struct inet6_skb_parm h6;
648 struct ip_tunnel *ip4;
653 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
656 * This structure is used for the duration where packets are being
657 * transformed by IPsec. As soon as the packet leaves IPsec the
658 * area beyond the generic IP part may be overwritten.
661 struct xfrm_tunnel_skb_cb header;
663 /* Sequence number for replay protection. */
676 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
679 * This structure is used by the afinfo prepare_input/prepare_output functions
680 * to transmit header information to the mode input/output functions.
682 struct xfrm_mode_skb_cb {
683 struct xfrm_tunnel_skb_cb header;
685 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
689 /* IP header length (excluding options or extension headers). */
692 /* TOS for IPv4, class for IPv6. */
695 /* TTL for IPv4, hop limitfor IPv6. */
698 /* Protocol for IPv4, NH for IPv6. */
701 /* Option length for IPv4, zero for IPv6. */
704 /* Used by IPv6 only, zero for IPv4. */
708 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
711 * This structure is used by the input processing to locate the SPI and
712 * related information.
714 struct xfrm_spi_skb_cb {
715 struct xfrm_tunnel_skb_cb header;
717 unsigned int daddroff;
722 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
724 #ifdef CONFIG_AUDITSYSCALL
725 static inline struct audit_buffer *xfrm_audit_start(const char *op)
727 struct audit_buffer *audit_buf = NULL;
729 if (audit_enabled == 0)
731 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
732 AUDIT_MAC_IPSEC_EVENT);
733 if (audit_buf == NULL)
735 audit_log_format(audit_buf, "op=%s", op);
739 static inline void xfrm_audit_helper_usrinfo(bool task_valid,
740 struct audit_buffer *audit_buf)
742 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
743 audit_get_loginuid(current) :
745 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
748 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
749 audit_log_task_context(audit_buf);
752 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
753 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
755 void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
756 void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
757 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
758 struct sk_buff *skb);
759 void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
761 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
762 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
764 void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
768 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
773 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
778 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
783 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
788 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
793 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
794 struct sk_buff *skb, __be32 net_seq)
798 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
803 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
804 __be32 net_spi, __be32 net_seq)
808 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
809 struct sk_buff *skb, u8 proto)
812 #endif /* CONFIG_AUDITSYSCALL */
814 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
816 if (likely(policy != NULL))
817 atomic_inc(&policy->refcnt);
820 void xfrm_policy_destroy(struct xfrm_policy *policy);
822 static inline void xfrm_pol_put(struct xfrm_policy *policy)
824 if (atomic_dec_and_test(&policy->refcnt))
825 xfrm_policy_destroy(policy);
828 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
831 for (i = npols - 1; i >= 0; --i)
832 xfrm_pol_put(pols[i]);
835 void __xfrm_state_destroy(struct xfrm_state *);
837 static inline void __xfrm_state_put(struct xfrm_state *x)
839 atomic_dec(&x->refcnt);
842 static inline void xfrm_state_put(struct xfrm_state *x)
844 if (atomic_dec_and_test(&x->refcnt))
845 __xfrm_state_destroy(x);
848 static inline void xfrm_state_hold(struct xfrm_state *x)
850 atomic_inc(&x->refcnt);
853 static inline bool addr_match(const void *token1, const void *token2,
854 unsigned int prefixlen)
856 const __be32 *a1 = token1;
857 const __be32 *a2 = token2;
861 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
862 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
865 if (memcmp(a1, a2, pdw << 2))
871 mask = htonl((0xffffffff) << (32 - pbi));
873 if ((a1[pdw] ^ a2[pdw]) & mask)
880 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
882 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
883 if (sizeof(long) == 4 && prefixlen == 0)
885 return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen)));
889 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
892 switch(fl->flowi_proto) {
895 case IPPROTO_UDPLITE:
897 port = uli->ports.sport;
901 port = htons(uli->icmpt.type);
904 port = htons(uli->mht.type);
907 port = htons(ntohl(uli->gre_key) >> 16);
916 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
919 switch(fl->flowi_proto) {
922 case IPPROTO_UDPLITE:
924 port = uli->ports.dport;
928 port = htons(uli->icmpt.code);
931 port = htons(ntohl(uli->gre_key) & 0xffff);
939 bool xfrm_selector_match(const struct xfrm_selector *sel,
940 const struct flowi *fl, unsigned short family);
942 #ifdef CONFIG_SECURITY_NETWORK_XFRM
943 /* If neither has a context --> match
944 * Otherwise, both must have a context and the sids, doi, alg must match
946 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
948 return ((!s1 && !s2) ||
950 (s1->ctx_sid == s2->ctx_sid) &&
951 (s1->ctx_doi == s2->ctx_doi) &&
952 (s1->ctx_alg == s2->ctx_alg)));
955 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
961 /* A struct encoding bundle of transformations to apply to some set of flow.
963 * dst->child points to the next element of bundle.
964 * dst->xfrm points to an instanse of transformer.
966 * Due to unfortunate limitations of current routing cache, which we
967 * have no time to fix, it mirrors struct rtable and bound to the same
968 * routing key, including saddr,daddr. However, we can have many of
969 * bundles differing by session id. All the bundles grow from a parent
974 struct dst_entry dst;
978 struct dst_entry *route;
979 struct flow_cache_object flo;
980 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
981 int num_pols, num_xfrms;
982 #ifdef CONFIG_XFRM_SUB_POLICY
983 struct flowi *origin;
984 struct xfrm_selector *partner;
988 u32 route_mtu_cached;
989 u32 child_mtu_cached;
995 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
997 xfrm_pols_put(xdst->pols, xdst->num_pols);
998 dst_release(xdst->route);
999 if (likely(xdst->u.dst.xfrm))
1000 xfrm_state_put(xdst->u.dst.xfrm);
1001 #ifdef CONFIG_XFRM_SUB_POLICY
1002 kfree(xdst->origin);
1003 xdst->origin = NULL;
1004 kfree(xdst->partner);
1005 xdst->partner = NULL;
1010 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
1012 struct xfrm_offload {
1013 /* Output sequence number for replay protection on offloading. */
1020 #define SA_DELETE_REQ 1
1021 #define CRYPTO_DONE 2
1022 #define CRYPTO_NEXT_DONE 4
1023 #define CRYPTO_FALLBACK 8
1024 #define XFRM_GSO_SEGMENT 16
1028 #define CRYPTO_SUCCESS 1
1029 #define CRYPTO_GENERIC_ERROR 2
1030 #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
1031 #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
1032 #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
1033 #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
1034 #define CRYPTO_INVALID_PACKET_SYNTAX 64
1035 #define CRYPTO_INVALID_PROTOCOL 128
1045 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1046 struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
1049 static inline int secpath_exists(struct sk_buff *skb)
1052 return skb->sp != NULL;
1058 static inline struct sec_path *
1059 secpath_get(struct sec_path *sp)
1062 atomic_inc(&sp->refcnt);
1066 void __secpath_destroy(struct sec_path *sp);
1069 secpath_put(struct sec_path *sp)
1071 if (sp && atomic_dec_and_test(&sp->refcnt))
1072 __secpath_destroy(sp);
1075 struct sec_path *secpath_dup(struct sec_path *src);
1076 int secpath_set(struct sk_buff *skb);
1079 secpath_reset(struct sk_buff *skb)
1082 secpath_put(skb->sp);
1088 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1092 return addr->a4 == 0;
1094 return ipv6_addr_any(&addr->in6);
1100 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1102 return (tmpl->saddr.a4 &&
1103 tmpl->saddr.a4 != x->props.saddr.a4);
1107 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1109 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1110 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1114 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1118 return __xfrm4_state_addr_cmp(tmpl, x);
1120 return __xfrm6_state_addr_cmp(tmpl, x);
1126 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1127 unsigned short family);
1129 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1130 struct sk_buff *skb,
1131 unsigned int family, int reverse)
1133 struct net *net = dev_net(skb->dev);
1134 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1136 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1137 return __xfrm_policy_check(sk, ndir, skb, family);
1139 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
1140 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1141 __xfrm_policy_check(sk, ndir, skb, family);
1144 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1146 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1149 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1151 return xfrm_policy_check(sk, dir, skb, AF_INET);
1154 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1156 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1159 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1160 struct sk_buff *skb)
1162 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1165 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1166 struct sk_buff *skb)
1168 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1171 int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1172 unsigned int family, int reverse);
1174 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1175 unsigned int family)
1177 return __xfrm_decode_session(skb, fl, family, 0);
1180 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1182 unsigned int family)
1184 return __xfrm_decode_session(skb, fl, family, 1);
1187 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1189 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1191 struct net *net = dev_net(skb->dev);
1193 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1194 (skb_dst(skb)->flags & DST_NOXFRM) ||
1195 __xfrm_route_forward(skb, family);
1198 static inline int xfrm4_route_forward(struct sk_buff *skb)
1200 return xfrm_route_forward(skb, AF_INET);
1203 static inline int xfrm6_route_forward(struct sk_buff *skb)
1205 return xfrm_route_forward(skb, AF_INET6);
1208 int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1210 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1212 sk->sk_policy[0] = NULL;
1213 sk->sk_policy[1] = NULL;
1214 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1215 return __xfrm_sk_clone_policy(sk, osk);
1219 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1221 static inline void xfrm_sk_free_policy(struct sock *sk)
1223 struct xfrm_policy *pol;
1225 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1226 if (unlikely(pol != NULL)) {
1227 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1228 sk->sk_policy[0] = NULL;
1230 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1231 if (unlikely(pol != NULL)) {
1232 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1233 sk->sk_policy[1] = NULL;
1237 void xfrm_garbage_collect(struct net *net);
1238 void xfrm_garbage_collect_deferred(struct net *net);
1242 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1243 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1244 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1245 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1246 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1250 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1254 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1258 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1260 unsigned int family)
1264 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1265 struct sk_buff *skb)
1269 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1270 struct sk_buff *skb)
1274 static inline void xfrm_garbage_collect(struct net *net)
1280 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1284 return (xfrm_address_t *)&fl->u.ip4.daddr;
1286 return (xfrm_address_t *)&fl->u.ip6.daddr;
1292 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1296 return (xfrm_address_t *)&fl->u.ip4.saddr;
1298 return (xfrm_address_t *)&fl->u.ip6.saddr;
1304 void xfrm_flowi_addr_get(const struct flowi *fl,
1305 xfrm_address_t *saddr, xfrm_address_t *daddr,
1306 unsigned short family)
1310 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1311 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1314 saddr->in6 = fl->u.ip6.saddr;
1315 daddr->in6 = fl->u.ip6.daddr;
1320 static __inline__ int
1321 __xfrm4_state_addr_check(const struct xfrm_state *x,
1322 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1324 if (daddr->a4 == x->id.daddr.a4 &&
1325 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1330 static __inline__ int
1331 __xfrm6_state_addr_check(const struct xfrm_state *x,
1332 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1334 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1335 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1336 ipv6_addr_any((struct in6_addr *)saddr) ||
1337 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1342 static __inline__ int
1343 xfrm_state_addr_check(const struct xfrm_state *x,
1344 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1345 unsigned short family)
1349 return __xfrm4_state_addr_check(x, daddr, saddr);
1351 return __xfrm6_state_addr_check(x, daddr, saddr);
1356 static __inline__ int
1357 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1358 unsigned short family)
1362 return __xfrm4_state_addr_check(x,
1363 (const xfrm_address_t *)&fl->u.ip4.daddr,
1364 (const xfrm_address_t *)&fl->u.ip4.saddr);
1366 return __xfrm6_state_addr_check(x,
1367 (const xfrm_address_t *)&fl->u.ip6.daddr,
1368 (const xfrm_address_t *)&fl->u.ip6.saddr);
1373 static inline int xfrm_state_kern(const struct xfrm_state *x)
1375 return atomic_read(&x->tunnel_users);
1378 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1380 return (!userproto || proto == userproto ||
1381 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1382 proto == IPPROTO_ESP ||
1383 proto == IPPROTO_COMP)));
1387 * xfrm algorithm information
1389 struct xfrm_algo_aead_info {
1394 struct xfrm_algo_auth_info {
1399 struct xfrm_algo_encr_info {
1405 struct xfrm_algo_comp_info {
1409 struct xfrm_algo_desc {
1413 u8 pfkey_supported:1;
1415 struct xfrm_algo_aead_info aead;
1416 struct xfrm_algo_auth_info auth;
1417 struct xfrm_algo_encr_info encr;
1418 struct xfrm_algo_comp_info comp;
1420 struct sadb_alg desc;
1423 /* XFRM protocol handlers. */
1424 struct xfrm4_protocol {
1425 int (*handler)(struct sk_buff *skb);
1426 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1428 int (*cb_handler)(struct sk_buff *skb, int err);
1429 int (*err_handler)(struct sk_buff *skb, u32 info);
1431 struct xfrm4_protocol __rcu *next;
1435 struct xfrm6_protocol {
1436 int (*handler)(struct sk_buff *skb);
1437 int (*cb_handler)(struct sk_buff *skb, int err);
1438 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1439 u8 type, u8 code, int offset, __be32 info);
1441 struct xfrm6_protocol __rcu *next;
1445 /* XFRM tunnel handlers. */
1446 struct xfrm_tunnel {
1447 int (*handler)(struct sk_buff *skb);
1448 int (*err_handler)(struct sk_buff *skb, u32 info);
1450 struct xfrm_tunnel __rcu *next;
1454 struct xfrm6_tunnel {
1455 int (*handler)(struct sk_buff *skb);
1456 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1457 u8 type, u8 code, int offset, __be32 info);
1458 struct xfrm6_tunnel __rcu *next;
1462 void xfrm_init(void);
1463 void xfrm4_init(void);
1464 int xfrm_state_init(struct net *net);
1465 void xfrm_state_fini(struct net *net);
1466 void xfrm4_state_init(void);
1467 void xfrm4_protocol_init(void);
1469 int xfrm6_init(void);
1470 void xfrm6_fini(void);
1471 int xfrm6_state_init(void);
1472 void xfrm6_state_fini(void);
1473 int xfrm6_protocol_init(void);
1474 void xfrm6_protocol_fini(void);
1476 static inline int xfrm6_init(void)
1480 static inline void xfrm6_fini(void)
1486 #ifdef CONFIG_XFRM_STATISTICS
1487 int xfrm_proc_init(struct net *net);
1488 void xfrm_proc_fini(struct net *net);
1491 int xfrm_sysctl_init(struct net *net);
1492 #ifdef CONFIG_SYSCTL
1493 void xfrm_sysctl_fini(struct net *net);
1495 static inline void xfrm_sysctl_fini(struct net *net)
1500 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1501 struct xfrm_address_filter *filter);
1502 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1503 int (*func)(struct xfrm_state *, int, void*), void *);
1504 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1505 struct xfrm_state *xfrm_state_alloc(struct net *net);
1506 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1507 const xfrm_address_t *saddr,
1508 const struct flowi *fl,
1509 struct xfrm_tmpl *tmpl,
1510 struct xfrm_policy *pol, int *err,
1511 unsigned short family);
1512 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1513 xfrm_address_t *daddr,
1514 xfrm_address_t *saddr,
1515 unsigned short family,
1516 u8 mode, u8 proto, u32 reqid);
1517 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1518 unsigned short family);
1519 int xfrm_state_check_expire(struct xfrm_state *x);
1520 void xfrm_state_insert(struct xfrm_state *x);
1521 int xfrm_state_add(struct xfrm_state *x);
1522 int xfrm_state_update(struct xfrm_state *x);
1523 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1524 const xfrm_address_t *daddr, __be32 spi,
1525 u8 proto, unsigned short family);
1526 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1527 const xfrm_address_t *daddr,
1528 const xfrm_address_t *saddr,
1530 unsigned short family);
1531 #ifdef CONFIG_XFRM_SUB_POLICY
1532 int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1533 unsigned short family, struct net *net);
1534 int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1535 unsigned short family);
1537 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1538 int n, unsigned short family, struct net *net)
1543 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1544 int n, unsigned short family)
1550 struct xfrmk_sadinfo {
1551 u32 sadhcnt; /* current hash bkts */
1552 u32 sadhmcnt; /* max allowed hash bkts */
1553 u32 sadcnt; /* current running count */
1556 struct xfrmk_spdinfo {
1567 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1568 int xfrm_state_delete(struct xfrm_state *x);
1569 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid);
1570 int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
1571 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1572 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1573 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1574 int xfrm_init_replay(struct xfrm_state *x);
1575 int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1576 int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
1577 int xfrm_init_state(struct xfrm_state *x);
1578 int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1579 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1580 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1581 int xfrm_output_resume(struct sk_buff *skb, int err);
1582 int xfrm_output(struct sock *sk, struct sk_buff *skb);
1583 int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1584 void xfrm_local_error(struct sk_buff *skb, int mtu);
1585 int xfrm4_extract_header(struct sk_buff *skb);
1586 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1587 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1589 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1590 int xfrm4_rcv(struct sk_buff *skb);
1591 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1593 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1595 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1596 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1597 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1598 return xfrm_input(skb, nexthdr, spi, 0);
1601 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1602 int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1603 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1604 int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1605 int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1606 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1607 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1608 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1609 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1610 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1611 int xfrm6_extract_header(struct sk_buff *skb);
1612 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1613 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1615 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1616 int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1617 int xfrm6_rcv(struct sk_buff *skb);
1618 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1619 xfrm_address_t *saddr, u8 proto);
1620 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1621 int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1622 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1623 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1624 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1625 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1626 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1627 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1628 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1629 int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1630 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1631 int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1632 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1636 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1637 int xfrm_user_policy(struct sock *sk, int optname,
1638 u8 __user *optval, int optlen);
1640 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1642 return -ENOPROTOOPT;
1645 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1647 /* should not happen */
1653 struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
1654 const xfrm_address_t *saddr,
1655 const xfrm_address_t *daddr,
1658 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1660 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1661 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1662 int (*func)(struct xfrm_policy *, int, int, void*),
1664 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1665 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1666 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1668 struct xfrm_selector *sel,
1669 struct xfrm_sec_ctx *ctx, int delete,
1671 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir,
1672 u32 id, int delete, int *err);
1673 int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1674 void xfrm_policy_hash_rebuild(struct net *net);
1675 u32 xfrm_get_acqseq(void);
1676 int verify_spi_info(u8 proto, u32 min, u32 max);
1677 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1678 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1679 u8 mode, u32 reqid, u8 proto,
1680 const xfrm_address_t *daddr,
1681 const xfrm_address_t *saddr, int create,
1682 unsigned short family);
1683 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1685 #ifdef CONFIG_XFRM_MIGRATE
1686 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1687 const struct xfrm_migrate *m, int num_bundles,
1688 const struct xfrm_kmaddress *k);
1689 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1690 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1691 struct xfrm_migrate *m);
1692 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1693 struct xfrm_migrate *m, int num_bundles,
1694 struct xfrm_kmaddress *k, struct net *net);
1697 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1698 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1699 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1700 xfrm_address_t *addr);
1702 void xfrm_input_init(void);
1703 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1705 void xfrm_probe_algs(void);
1706 int xfrm_count_pfkey_auth_supported(void);
1707 int xfrm_count_pfkey_enc_supported(void);
1708 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1709 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1710 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1711 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1712 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1713 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1714 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1715 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1716 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1719 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1720 const xfrm_address_t *b)
1722 return ipv6_addr_equal((const struct in6_addr *)a,
1723 (const struct in6_addr *)b);
1726 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1727 const xfrm_address_t *b,
1733 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1735 return xfrm6_addr_equal(a, b);
1739 static inline int xfrm_policy_id2dir(u32 index)
1745 static inline int xfrm_aevent_is_on(struct net *net)
1751 nlsk = rcu_dereference(net->xfrm.nlsk);
1753 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1758 static inline int xfrm_acquire_is_on(struct net *net)
1764 nlsk = rcu_dereference(net->xfrm.nlsk);
1766 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1773 static inline int aead_len(struct xfrm_algo_aead *alg)
1775 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1778 static inline int xfrm_alg_len(const struct xfrm_algo *alg)
1780 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1783 static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1785 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1788 static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1790 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1793 #ifdef CONFIG_XFRM_MIGRATE
1794 static inline int xfrm_replay_clone(struct xfrm_state *x,
1795 struct xfrm_state *orig)
1797 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1802 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1803 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1805 x->preplay_esn = kmemdup(x->replay_esn,
1806 xfrm_replay_state_esn_len(x->replay_esn),
1808 if (!x->preplay_esn) {
1809 kfree(x->replay_esn);
1816 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1818 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1822 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1824 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1827 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1829 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1832 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1835 for (i = 0; i < n; i++)
1836 xfrm_state_put(*(states + i));
1839 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1842 for (i = 0; i < n; i++)
1843 xfrm_state_delete(*(states + i));
1848 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1850 return skb->sp->xvec[skb->sp->len - 1];
1852 static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1854 struct sec_path *sp = skb->sp;
1856 if (!sp || !sp->olen || sp->len != sp->olen)
1859 return &sp->ovec[sp->olen - 1];
1863 #ifdef CONFIG_XFRM_OFFLOAD
1864 void __net_init xfrm_dev_init(void);
1865 int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
1866 struct xfrm_user_offload *xuo);
1867 bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
1869 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1871 struct xfrm_state_offload *xso = &x->xso;
1874 xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
1877 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1879 struct xfrm_state_offload *xso = &x->xso;
1880 struct net_device *dev = xso->dev;
1882 if (dev && dev->xfrmdev_ops) {
1883 dev->xfrmdev_ops->xdo_dev_state_free(x);
1889 static inline void __net_init xfrm_dev_init(void)
1893 static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
1898 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1902 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1906 static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
1912 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1914 if (attrs[XFRMA_MARK])
1915 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1922 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1927 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1931 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1932 unsigned int family)
1934 bool tunnel = false;
1938 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
1942 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
1946 if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL))
1951 #endif /* _NET_XFRM_H */