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;
984 u32 route_mtu_cached;
985 u32 child_mtu_cached;
991 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
993 xfrm_pols_put(xdst->pols, xdst->num_pols);
994 dst_release(xdst->route);
995 if (likely(xdst->u.dst.xfrm))
996 xfrm_state_put(xdst->u.dst.xfrm);
1000 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
1002 struct xfrm_offload {
1003 /* Output sequence number for replay protection on offloading. */
1010 #define SA_DELETE_REQ 1
1011 #define CRYPTO_DONE 2
1012 #define CRYPTO_NEXT_DONE 4
1013 #define CRYPTO_FALLBACK 8
1014 #define XFRM_GSO_SEGMENT 16
1018 #define CRYPTO_SUCCESS 1
1019 #define CRYPTO_GENERIC_ERROR 2
1020 #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
1021 #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
1022 #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
1023 #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
1024 #define CRYPTO_INVALID_PACKET_SYNTAX 64
1025 #define CRYPTO_INVALID_PROTOCOL 128
1035 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1036 struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
1039 static inline int secpath_exists(struct sk_buff *skb)
1042 return skb->sp != NULL;
1048 static inline struct sec_path *
1049 secpath_get(struct sec_path *sp)
1052 atomic_inc(&sp->refcnt);
1056 void __secpath_destroy(struct sec_path *sp);
1059 secpath_put(struct sec_path *sp)
1061 if (sp && atomic_dec_and_test(&sp->refcnt))
1062 __secpath_destroy(sp);
1065 struct sec_path *secpath_dup(struct sec_path *src);
1066 int secpath_set(struct sk_buff *skb);
1069 secpath_reset(struct sk_buff *skb)
1072 secpath_put(skb->sp);
1078 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1082 return addr->a4 == 0;
1084 return ipv6_addr_any(&addr->in6);
1090 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1092 return (tmpl->saddr.a4 &&
1093 tmpl->saddr.a4 != x->props.saddr.a4);
1097 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1099 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1100 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1104 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1108 return __xfrm4_state_addr_cmp(tmpl, x);
1110 return __xfrm6_state_addr_cmp(tmpl, x);
1116 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1117 unsigned short family);
1119 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1120 struct sk_buff *skb,
1121 unsigned int family, int reverse)
1123 struct net *net = dev_net(skb->dev);
1124 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1126 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1127 return __xfrm_policy_check(sk, ndir, skb, family);
1129 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
1130 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1131 __xfrm_policy_check(sk, ndir, skb, family);
1134 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1136 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1139 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1141 return xfrm_policy_check(sk, dir, skb, AF_INET);
1144 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1146 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1149 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1150 struct sk_buff *skb)
1152 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1155 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1156 struct sk_buff *skb)
1158 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1161 int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1162 unsigned int family, int reverse);
1164 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1165 unsigned int family)
1167 return __xfrm_decode_session(skb, fl, family, 0);
1170 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1172 unsigned int family)
1174 return __xfrm_decode_session(skb, fl, family, 1);
1177 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1179 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1181 struct net *net = dev_net(skb->dev);
1183 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1184 (skb_dst(skb)->flags & DST_NOXFRM) ||
1185 __xfrm_route_forward(skb, family);
1188 static inline int xfrm4_route_forward(struct sk_buff *skb)
1190 return xfrm_route_forward(skb, AF_INET);
1193 static inline int xfrm6_route_forward(struct sk_buff *skb)
1195 return xfrm_route_forward(skb, AF_INET6);
1198 int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1200 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1202 sk->sk_policy[0] = NULL;
1203 sk->sk_policy[1] = NULL;
1204 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1205 return __xfrm_sk_clone_policy(sk, osk);
1209 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1211 static inline void xfrm_sk_free_policy(struct sock *sk)
1213 struct xfrm_policy *pol;
1215 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1216 if (unlikely(pol != NULL)) {
1217 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1218 sk->sk_policy[0] = NULL;
1220 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1221 if (unlikely(pol != NULL)) {
1222 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1223 sk->sk_policy[1] = NULL;
1227 void xfrm_garbage_collect(struct net *net);
1228 void xfrm_garbage_collect_deferred(struct net *net);
1232 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1233 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1234 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1235 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1236 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1240 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1244 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1248 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1250 unsigned int family)
1254 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1255 struct sk_buff *skb)
1259 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1260 struct sk_buff *skb)
1264 static inline void xfrm_garbage_collect(struct net *net)
1270 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1274 return (xfrm_address_t *)&fl->u.ip4.daddr;
1276 return (xfrm_address_t *)&fl->u.ip6.daddr;
1282 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1286 return (xfrm_address_t *)&fl->u.ip4.saddr;
1288 return (xfrm_address_t *)&fl->u.ip6.saddr;
1294 void xfrm_flowi_addr_get(const struct flowi *fl,
1295 xfrm_address_t *saddr, xfrm_address_t *daddr,
1296 unsigned short family)
1300 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1301 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1304 saddr->in6 = fl->u.ip6.saddr;
1305 daddr->in6 = fl->u.ip6.daddr;
1310 static __inline__ int
1311 __xfrm4_state_addr_check(const struct xfrm_state *x,
1312 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1314 if (daddr->a4 == x->id.daddr.a4 &&
1315 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1320 static __inline__ int
1321 __xfrm6_state_addr_check(const struct xfrm_state *x,
1322 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1324 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1325 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1326 ipv6_addr_any((struct in6_addr *)saddr) ||
1327 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1332 static __inline__ int
1333 xfrm_state_addr_check(const struct xfrm_state *x,
1334 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1335 unsigned short family)
1339 return __xfrm4_state_addr_check(x, daddr, saddr);
1341 return __xfrm6_state_addr_check(x, daddr, saddr);
1346 static __inline__ int
1347 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1348 unsigned short family)
1352 return __xfrm4_state_addr_check(x,
1353 (const xfrm_address_t *)&fl->u.ip4.daddr,
1354 (const xfrm_address_t *)&fl->u.ip4.saddr);
1356 return __xfrm6_state_addr_check(x,
1357 (const xfrm_address_t *)&fl->u.ip6.daddr,
1358 (const xfrm_address_t *)&fl->u.ip6.saddr);
1363 static inline int xfrm_state_kern(const struct xfrm_state *x)
1365 return atomic_read(&x->tunnel_users);
1368 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1370 return (!userproto || proto == userproto ||
1371 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1372 proto == IPPROTO_ESP ||
1373 proto == IPPROTO_COMP)));
1377 * xfrm algorithm information
1379 struct xfrm_algo_aead_info {
1384 struct xfrm_algo_auth_info {
1389 struct xfrm_algo_encr_info {
1395 struct xfrm_algo_comp_info {
1399 struct xfrm_algo_desc {
1403 u8 pfkey_supported:1;
1405 struct xfrm_algo_aead_info aead;
1406 struct xfrm_algo_auth_info auth;
1407 struct xfrm_algo_encr_info encr;
1408 struct xfrm_algo_comp_info comp;
1410 struct sadb_alg desc;
1413 /* XFRM protocol handlers. */
1414 struct xfrm4_protocol {
1415 int (*handler)(struct sk_buff *skb);
1416 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1418 int (*cb_handler)(struct sk_buff *skb, int err);
1419 int (*err_handler)(struct sk_buff *skb, u32 info);
1421 struct xfrm4_protocol __rcu *next;
1425 struct xfrm6_protocol {
1426 int (*handler)(struct sk_buff *skb);
1427 int (*cb_handler)(struct sk_buff *skb, int err);
1428 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1429 u8 type, u8 code, int offset, __be32 info);
1431 struct xfrm6_protocol __rcu *next;
1435 /* XFRM tunnel handlers. */
1436 struct xfrm_tunnel {
1437 int (*handler)(struct sk_buff *skb);
1438 int (*err_handler)(struct sk_buff *skb, u32 info);
1440 struct xfrm_tunnel __rcu *next;
1444 struct xfrm6_tunnel {
1445 int (*handler)(struct sk_buff *skb);
1446 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1447 u8 type, u8 code, int offset, __be32 info);
1448 struct xfrm6_tunnel __rcu *next;
1452 void xfrm_init(void);
1453 void xfrm4_init(void);
1454 int xfrm_state_init(struct net *net);
1455 void xfrm_state_fini(struct net *net);
1456 void xfrm4_state_init(void);
1457 void xfrm4_protocol_init(void);
1459 int xfrm6_init(void);
1460 void xfrm6_fini(void);
1461 int xfrm6_state_init(void);
1462 void xfrm6_state_fini(void);
1463 int xfrm6_protocol_init(void);
1464 void xfrm6_protocol_fini(void);
1466 static inline int xfrm6_init(void)
1470 static inline void xfrm6_fini(void)
1476 #ifdef CONFIG_XFRM_STATISTICS
1477 int xfrm_proc_init(struct net *net);
1478 void xfrm_proc_fini(struct net *net);
1481 int xfrm_sysctl_init(struct net *net);
1482 #ifdef CONFIG_SYSCTL
1483 void xfrm_sysctl_fini(struct net *net);
1485 static inline void xfrm_sysctl_fini(struct net *net)
1490 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1491 struct xfrm_address_filter *filter);
1492 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1493 int (*func)(struct xfrm_state *, int, void*), void *);
1494 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1495 struct xfrm_state *xfrm_state_alloc(struct net *net);
1496 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1497 const xfrm_address_t *saddr,
1498 const struct flowi *fl,
1499 struct xfrm_tmpl *tmpl,
1500 struct xfrm_policy *pol, int *err,
1501 unsigned short family);
1502 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1503 xfrm_address_t *daddr,
1504 xfrm_address_t *saddr,
1505 unsigned short family,
1506 u8 mode, u8 proto, u32 reqid);
1507 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1508 unsigned short family);
1509 int xfrm_state_check_expire(struct xfrm_state *x);
1510 void xfrm_state_insert(struct xfrm_state *x);
1511 int xfrm_state_add(struct xfrm_state *x);
1512 int xfrm_state_update(struct xfrm_state *x);
1513 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1514 const xfrm_address_t *daddr, __be32 spi,
1515 u8 proto, unsigned short family);
1516 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1517 const xfrm_address_t *daddr,
1518 const xfrm_address_t *saddr,
1520 unsigned short family);
1521 #ifdef CONFIG_XFRM_SUB_POLICY
1522 int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1523 unsigned short family, struct net *net);
1524 int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1525 unsigned short family);
1527 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1528 int n, unsigned short family, struct net *net)
1533 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1534 int n, unsigned short family)
1540 struct xfrmk_sadinfo {
1541 u32 sadhcnt; /* current hash bkts */
1542 u32 sadhmcnt; /* max allowed hash bkts */
1543 u32 sadcnt; /* current running count */
1546 struct xfrmk_spdinfo {
1557 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1558 int xfrm_state_delete(struct xfrm_state *x);
1559 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid);
1560 int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
1561 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1562 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1563 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1564 int xfrm_init_replay(struct xfrm_state *x);
1565 int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1566 int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
1567 int xfrm_init_state(struct xfrm_state *x);
1568 int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1569 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1570 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1571 int xfrm_output_resume(struct sk_buff *skb, int err);
1572 int xfrm_output(struct sock *sk, struct sk_buff *skb);
1573 int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1574 void xfrm_local_error(struct sk_buff *skb, int mtu);
1575 int xfrm4_extract_header(struct sk_buff *skb);
1576 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1577 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1579 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1580 int xfrm4_rcv(struct sk_buff *skb);
1581 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1583 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1585 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1586 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1587 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1588 return xfrm_input(skb, nexthdr, spi, 0);
1591 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1592 int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1593 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1594 int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1595 int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1596 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1597 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1598 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1599 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1600 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1601 int xfrm6_extract_header(struct sk_buff *skb);
1602 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1603 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1605 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1606 int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1607 int xfrm6_rcv(struct sk_buff *skb);
1608 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1609 xfrm_address_t *saddr, u8 proto);
1610 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1611 int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1612 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1613 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1614 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1615 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1616 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1617 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1618 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1619 int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1620 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1621 int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1622 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1626 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1627 int xfrm_user_policy(struct sock *sk, int optname,
1628 u8 __user *optval, int optlen);
1630 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1632 return -ENOPROTOOPT;
1635 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1637 /* should not happen */
1643 struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
1644 const xfrm_address_t *saddr,
1645 const xfrm_address_t *daddr,
1648 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1650 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1651 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1652 int (*func)(struct xfrm_policy *, int, int, void*),
1654 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1655 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1656 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1658 struct xfrm_selector *sel,
1659 struct xfrm_sec_ctx *ctx, int delete,
1661 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir,
1662 u32 id, int delete, int *err);
1663 int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1664 void xfrm_policy_hash_rebuild(struct net *net);
1665 u32 xfrm_get_acqseq(void);
1666 int verify_spi_info(u8 proto, u32 min, u32 max);
1667 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1668 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1669 u8 mode, u32 reqid, u8 proto,
1670 const xfrm_address_t *daddr,
1671 const xfrm_address_t *saddr, int create,
1672 unsigned short family);
1673 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1675 #ifdef CONFIG_XFRM_MIGRATE
1676 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1677 const struct xfrm_migrate *m, int num_bundles,
1678 const struct xfrm_kmaddress *k);
1679 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1680 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1681 struct xfrm_migrate *m);
1682 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1683 struct xfrm_migrate *m, int num_bundles,
1684 struct xfrm_kmaddress *k, struct net *net);
1687 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1688 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1689 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1690 xfrm_address_t *addr);
1692 void xfrm_input_init(void);
1693 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1695 void xfrm_probe_algs(void);
1696 int xfrm_count_pfkey_auth_supported(void);
1697 int xfrm_count_pfkey_enc_supported(void);
1698 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1699 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1700 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1701 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1702 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1703 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1704 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1705 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1706 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1709 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1710 const xfrm_address_t *b)
1712 return ipv6_addr_equal((const struct in6_addr *)a,
1713 (const struct in6_addr *)b);
1716 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1717 const xfrm_address_t *b,
1723 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1725 return xfrm6_addr_equal(a, b);
1729 static inline int xfrm_policy_id2dir(u32 index)
1735 static inline int xfrm_aevent_is_on(struct net *net)
1741 nlsk = rcu_dereference(net->xfrm.nlsk);
1743 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1748 static inline int xfrm_acquire_is_on(struct net *net)
1754 nlsk = rcu_dereference(net->xfrm.nlsk);
1756 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1763 static inline int aead_len(struct xfrm_algo_aead *alg)
1765 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1768 static inline int xfrm_alg_len(const struct xfrm_algo *alg)
1770 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1773 static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1775 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1778 static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1780 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1783 #ifdef CONFIG_XFRM_MIGRATE
1784 static inline int xfrm_replay_clone(struct xfrm_state *x,
1785 struct xfrm_state *orig)
1787 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1792 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1793 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1795 x->preplay_esn = kmemdup(x->replay_esn,
1796 xfrm_replay_state_esn_len(x->replay_esn),
1798 if (!x->preplay_esn) {
1799 kfree(x->replay_esn);
1806 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1808 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1812 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1814 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1817 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1819 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1822 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1825 for (i = 0; i < n; i++)
1826 xfrm_state_put(*(states + i));
1829 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1832 for (i = 0; i < n; i++)
1833 xfrm_state_delete(*(states + i));
1838 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1840 return skb->sp->xvec[skb->sp->len - 1];
1842 static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1844 struct sec_path *sp = skb->sp;
1846 if (!sp || !sp->olen || sp->len != sp->olen)
1849 return &sp->ovec[sp->olen - 1];
1853 void __net_init xfrm_dev_init(void);
1855 #ifdef CONFIG_XFRM_OFFLOAD
1856 int validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features);
1857 int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
1858 struct xfrm_user_offload *xuo);
1859 bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
1861 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1863 struct xfrm_state_offload *xso = &x->xso;
1866 xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
1869 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1871 struct xfrm_state_offload *xso = &x->xso;
1872 struct net_device *dev = xso->dev;
1874 if (dev && dev->xfrmdev_ops) {
1875 dev->xfrmdev_ops->xdo_dev_state_free(x);
1881 static inline int validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features)
1886 static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
1891 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1895 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1899 static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
1905 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1907 if (attrs[XFRMA_MARK])
1908 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1915 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1920 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1924 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1925 unsigned int family)
1927 bool tunnel = false;
1931 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
1935 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
1939 if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL))
1944 #endif /* _NET_XFRM_H */