4 #include <linux/compiler.h>
5 #include <linux/xfrm.h>
6 #include <linux/spinlock.h>
7 #include <linux/list.h>
8 #include <linux/skbuff.h>
9 #include <linux/socket.h>
10 #include <linux/pfkeyv2.h>
11 #include <linux/ipsec.h>
12 #include <linux/in6.h>
13 #include <linux/mutex.h>
14 #include <linux/audit.h>
15 #include <linux/slab.h>
20 #include <net/route.h>
22 #include <net/ip6_fib.h>
25 #include <linux/interrupt.h>
27 #ifdef CONFIG_XFRM_STATISTICS
31 #define XFRM_PROTO_ESP 50
32 #define XFRM_PROTO_AH 51
33 #define XFRM_PROTO_COMP 108
34 #define XFRM_PROTO_IPIP 4
35 #define XFRM_PROTO_IPV6 41
36 #define XFRM_PROTO_ROUTING IPPROTO_ROUTING
37 #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
39 #define XFRM_ALIGN4(len) (((len) + 3) & ~3)
40 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
41 #define MODULE_ALIAS_XFRM_MODE(family, encap) \
42 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
43 #define MODULE_ALIAS_XFRM_TYPE(family, proto) \
44 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
46 #ifdef CONFIG_XFRM_STATISTICS
47 #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
48 #define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field)
49 #define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field)
51 #define XFRM_INC_STATS(net, field) ((void)(net))
52 #define XFRM_INC_STATS_BH(net, field) ((void)(net))
53 #define XFRM_INC_STATS_USER(net, field) ((void)(net))
57 /* Organization of SPD aka "XFRM rules"
58 ------------------------------------
61 - policy rule, struct xfrm_policy (=SPD entry)
62 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
63 - instance of a transformer, struct xfrm_state (=SA)
64 - template to clone xfrm_state, struct xfrm_tmpl
66 SPD is plain linear list of xfrm_policy rules, ordered by priority.
67 (To be compatible with existing pfkeyv2 implementations,
68 many rules with priority of 0x7fffffff are allowed to exist and
69 such rules are ordered in an unpredictable way, thanks to bsd folks.)
71 Lookup is plain linear search until the first match with selector.
73 If "action" is "block", then we prohibit the flow, otherwise:
74 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
75 policy entry has list of up to XFRM_MAX_DEPTH transformations,
76 described by templates xfrm_tmpl. Each template is resolved
77 to a complete xfrm_state (see below) and we pack bundle of transformations
78 to a dst_entry returned to requestor.
80 dst -. xfrm .-> xfrm_state #1
81 |---. child .-> dst -. xfrm .-> xfrm_state #2
82 |---. child .-> dst -. xfrm .-> xfrm_state #3
85 Bundles are cached at xrfm_policy struct (field ->bundles).
88 Resolution of xrfm_tmpl
89 -----------------------
91 1. ->mode Mode: transport or tunnel
92 2. ->id.proto Protocol: AH/ESP/IPCOMP
93 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
94 Q: allow to resolve security gateway?
95 4. ->id.spi If not zero, static SPI.
96 5. ->saddr Local tunnel endpoint, ignored for transport mode.
97 6. ->algos List of allowed algos. Plain bitmask now.
98 Q: ealgos, aalgos, calgos. What a mess...
99 7. ->share Sharing mode.
100 Q: how to implement private sharing mode? To add struct sock* to
103 Having this template we search through SAD searching for entries
104 with appropriate mode/proto/algo, permitted by selector.
105 If no appropriate entry found, it is requested from key manager.
108 Q: How to find all the bundles referring to a physical path for
109 PMTU discovery? Seems, dst should contain list of all parents...
110 and enter to infinite locking hierarchy disaster.
111 No! It is easier, we will not search for them, let them find us.
112 We add genid to each dst plus pointer to genid of raw IP route,
113 pmtu disc will update pmtu on raw IP route and increase its genid.
114 dst_check() will see this for top level and trigger resyncing
115 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
118 struct xfrm_state_walk {
119 struct list_head all;
124 struct xfrm_address_filter *filter;
127 /* Full description of state of transformer. */
133 struct hlist_node gclist;
134 struct hlist_node bydst;
136 struct hlist_node bysrc;
137 struct hlist_node byspi;
143 struct xfrm_selector sel;
144 struct xfrm_mark mark;
149 /* Key manager bits */
150 struct xfrm_state_walk km;
152 /* Parameters of this state. */
157 u8 aalgo, ealgo, calgo;
160 xfrm_address_t saddr;
166 struct xfrm_lifetime_cfg lft;
168 /* Data for transformer */
169 struct xfrm_algo_auth *aalg;
170 struct xfrm_algo *ealg;
171 struct xfrm_algo *calg;
172 struct xfrm_algo_aead *aead;
174 /* Data for encapsulator */
175 struct xfrm_encap_tmpl *encap;
177 /* Data for care-of address */
178 xfrm_address_t *coaddr;
180 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
181 struct xfrm_state *tunnel;
183 /* If a tunnel, number of users + 1 */
184 atomic_t tunnel_users;
186 /* State for replay detection */
187 struct xfrm_replay_state replay;
188 struct xfrm_replay_state_esn *replay_esn;
190 /* Replay detection state at the time we sent the last notification */
191 struct xfrm_replay_state preplay;
192 struct xfrm_replay_state_esn *preplay_esn;
194 /* The functions for replay detection. */
195 struct xfrm_replay *repl;
197 /* internal flag that only holds state for delayed aevent at the
202 /* Replay detection notification settings */
206 /* Replay detection notification timer */
207 struct timer_list rtimer;
210 struct xfrm_stats stats;
212 struct xfrm_lifetime_cur curlft;
213 struct tasklet_hrtimer mtimer;
215 /* used to fix curlft->add_time when changing date */
219 unsigned long lastused;
221 /* Reference to data common to all the instances of this
223 const struct xfrm_type *type;
224 struct xfrm_mode *inner_mode;
225 struct xfrm_mode *inner_mode_iaf;
226 struct xfrm_mode *outer_mode;
228 /* Security context */
229 struct xfrm_sec_ctx *security;
231 /* Private data of this transformer, format is opaque,
232 * interpreted by xfrm_type methods. */
236 static inline struct net *xs_net(struct xfrm_state *x)
238 return read_pnet(&x->xs_net);
241 /* xflags - make enum if more show up */
242 #define XFRM_TIME_DEFER 1
243 #define XFRM_SOFT_EXPIRE 2
254 /* callback structure passed from either netlink or pfkey */
271 void (*advance)(struct xfrm_state *x, __be32 net_seq);
272 int (*check)(struct xfrm_state *x,
275 int (*recheck)(struct xfrm_state *x,
278 void (*notify)(struct xfrm_state *x, int event);
279 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
285 struct xfrm_policy_afinfo {
286 unsigned short family;
287 struct dst_ops *dst_ops;
288 void (*garbage_collect)(struct net *net);
289 struct dst_entry *(*dst_lookup)(struct net *net, int tos,
290 const xfrm_address_t *saddr,
291 const xfrm_address_t *daddr);
292 int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr);
293 void (*decode_session)(struct sk_buff *skb,
296 int (*get_tos)(const struct flowi *fl);
297 void (*init_dst)(struct net *net,
298 struct xfrm_dst *dst);
299 int (*init_path)(struct xfrm_dst *path,
300 struct dst_entry *dst,
302 int (*fill_dst)(struct xfrm_dst *xdst,
303 struct net_device *dev,
304 const struct flowi *fl);
305 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
308 int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
309 int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
310 void km_policy_notify(struct xfrm_policy *xp, int dir,
311 const struct km_event *c);
312 void km_state_notify(struct xfrm_state *x, const struct km_event *c);
315 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
316 struct xfrm_policy *pol);
317 void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
318 int __xfrm_state_delete(struct xfrm_state *x);
320 struct xfrm_state_afinfo {
324 struct module *owner;
325 const struct xfrm_type *type_map[IPPROTO_MAX];
326 struct xfrm_mode *mode_map[XFRM_MODE_MAX];
327 int (*init_flags)(struct xfrm_state *x);
328 void (*init_tempsel)(struct xfrm_selector *sel,
329 const struct flowi *fl);
330 void (*init_temprop)(struct xfrm_state *x,
331 const struct xfrm_tmpl *tmpl,
332 const xfrm_address_t *daddr,
333 const xfrm_address_t *saddr);
334 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
335 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
336 int (*output)(struct sk_buff *skb);
337 int (*output_finish)(struct sk_buff *skb);
338 int (*extract_input)(struct xfrm_state *x,
339 struct sk_buff *skb);
340 int (*extract_output)(struct xfrm_state *x,
341 struct sk_buff *skb);
342 int (*transport_finish)(struct sk_buff *skb,
344 void (*local_error)(struct sk_buff *skb, u32 mtu);
347 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
348 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
349 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
350 void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
352 struct xfrm_input_afinfo {
354 struct module *owner;
355 int (*callback)(struct sk_buff *skb, u8 protocol,
359 int xfrm_input_register_afinfo(struct xfrm_input_afinfo *afinfo);
360 int xfrm_input_unregister_afinfo(struct xfrm_input_afinfo *afinfo);
362 void xfrm_state_delete_tunnel(struct xfrm_state *x);
366 struct module *owner;
369 #define XFRM_TYPE_NON_FRAGMENT 1
370 #define XFRM_TYPE_REPLAY_PROT 2
371 #define XFRM_TYPE_LOCAL_COADDR 4
372 #define XFRM_TYPE_REMOTE_COADDR 8
374 int (*init_state)(struct xfrm_state *x);
375 void (*destructor)(struct xfrm_state *);
376 int (*input)(struct xfrm_state *, struct sk_buff *skb);
377 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
378 int (*reject)(struct xfrm_state *, struct sk_buff *,
379 const struct flowi *);
380 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
381 /* Estimate maximal size of result of transformation of a dgram */
382 u32 (*get_mtu)(struct xfrm_state *, int size);
385 int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
386 int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
390 * Remove encapsulation header.
392 * The IP header will be moved over the top of the encapsulation
395 * On entry, the transport header shall point to where the IP header
396 * should be and the network header shall be set to where the IP
397 * header currently is. skb->data shall point to the start of the
400 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
403 * This is the actual input entry point.
405 * For transport mode and equivalent this would be identical to
406 * input2 (which does not need to be set). While tunnel mode
407 * and equivalent would set this to the tunnel encapsulation function
408 * xfrm4_prepare_input that would in turn call input2.
410 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
413 * Add encapsulation header.
415 * On exit, the transport header will be set to the start of the
416 * encapsulation header to be filled in by x->type->output and
417 * the mac header will be set to the nextheader (protocol for
418 * IPv4) field of the extension header directly preceding the
419 * encapsulation header, or in its absence, that of the top IP
420 * header. The value of the network header will always point
421 * to the top IP header while skb->data will point to the payload.
423 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
426 * This is the actual output entry point.
428 * For transport mode and equivalent this would be identical to
429 * output2 (which does not need to be set). While tunnel mode
430 * and equivalent would set this to a tunnel encapsulation function
431 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
434 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
436 struct xfrm_state_afinfo *afinfo;
437 struct module *owner;
442 /* Flags for xfrm_mode. */
444 XFRM_MODE_FLAG_TUNNEL = 1,
447 int xfrm_register_mode(struct xfrm_mode *mode, int family);
448 int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
450 static inline int xfrm_af2proto(unsigned int family)
462 static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
464 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
465 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
466 return x->inner_mode;
468 return x->inner_mode_iaf;
472 /* id in template is interpreted as:
473 * daddr - destination of tunnel, may be zero for transport mode.
474 * spi - zero to acquire spi. Not zero if spi is static, then
475 * daddr must be fixed too.
476 * proto - AH/ESP/IPCOMP
480 /* Source address of tunnel. Ignored, if it is not a tunnel. */
481 xfrm_address_t saddr;
483 unsigned short encap_family;
487 /* Mode: transport, tunnel etc. */
490 /* Sharing mode: unique, this session only, this user only etc. */
493 /* May skip this transfomration if no SA is found */
496 /* Skip aalgos/ealgos/calgos checks. */
499 /* Bit mask of algos allowed for acquisition */
505 #define XFRM_MAX_DEPTH 6
507 struct xfrm_policy_walk_entry {
508 struct list_head all;
512 struct xfrm_policy_walk {
513 struct xfrm_policy_walk_entry walk;
518 struct xfrm_policy_queue {
519 struct sk_buff_head hold_queue;
520 struct timer_list hold_timer;
521 unsigned long timeout;
528 struct hlist_node bydst;
529 struct hlist_node byidx;
531 /* This lock only affects elements except for entry. */
534 struct timer_list timer;
536 struct flow_cache_object flo;
540 struct xfrm_mark mark;
541 struct xfrm_selector selector;
542 struct xfrm_lifetime_cfg lft;
543 struct xfrm_lifetime_cur curlft;
544 struct xfrm_policy_walk_entry walk;
545 struct xfrm_policy_queue polq;
551 struct xfrm_sec_ctx *security;
552 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
555 static inline struct net *xp_net(const struct xfrm_policy *xp)
557 return read_pnet(&xp->xp_net);
560 struct xfrm_kmaddress {
561 xfrm_address_t local;
562 xfrm_address_t remote;
567 struct xfrm_migrate {
568 xfrm_address_t old_daddr;
569 xfrm_address_t old_saddr;
570 xfrm_address_t new_daddr;
571 xfrm_address_t new_saddr;
580 #define XFRM_KM_TIMEOUT 30
582 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
583 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
585 /* default aevent timeout in units of 100ms */
586 #define XFRM_AE_ETIME 10
587 /* Async Event timer multiplier */
588 #define XFRM_AE_ETH_M 10
589 /* default seq threshold size */
590 #define XFRM_AE_SEQT_SIZE 2
593 struct list_head list;
595 int (*notify)(struct xfrm_state *x, const struct km_event *c);
596 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
597 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
598 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
599 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
600 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
601 int (*migrate)(const struct xfrm_selector *sel,
603 const struct xfrm_migrate *m,
605 const struct xfrm_kmaddress *k);
606 bool (*is_alive)(const struct km_event *c);
609 int xfrm_register_km(struct xfrm_mgr *km);
610 int xfrm_unregister_km(struct xfrm_mgr *km);
612 struct xfrm_tunnel_skb_cb {
614 struct inet_skb_parm h4;
615 struct inet6_skb_parm h6;
619 struct ip_tunnel *ip4;
624 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
627 * This structure is used for the duration where packets are being
628 * transformed by IPsec. As soon as the packet leaves IPsec the
629 * area beyond the generic IP part may be overwritten.
632 struct xfrm_tunnel_skb_cb header;
634 /* Sequence number for replay protection. */
647 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
650 * This structure is used by the afinfo prepare_input/prepare_output functions
651 * to transmit header information to the mode input/output functions.
653 struct xfrm_mode_skb_cb {
654 struct xfrm_tunnel_skb_cb header;
656 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
660 /* IP header length (excluding options or extension headers). */
663 /* TOS for IPv4, class for IPv6. */
666 /* TTL for IPv4, hop limitfor IPv6. */
669 /* Protocol for IPv4, NH for IPv6. */
672 /* Option length for IPv4, zero for IPv6. */
675 /* Used by IPv6 only, zero for IPv4. */
679 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
682 * This structure is used by the input processing to locate the SPI and
683 * related information.
685 struct xfrm_spi_skb_cb {
686 struct xfrm_tunnel_skb_cb header;
688 unsigned int daddroff;
692 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
694 /* Audit Information */
698 unsigned int sessionid;
701 #ifdef CONFIG_AUDITSYSCALL
702 static inline struct audit_buffer *xfrm_audit_start(const char *op)
704 struct audit_buffer *audit_buf = NULL;
706 if (audit_enabled == 0)
708 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
709 AUDIT_MAC_IPSEC_EVENT);
710 if (audit_buf == NULL)
712 audit_log_format(audit_buf, "op=%s", op);
716 static inline void xfrm_audit_helper_usrinfo(kuid_t auid, unsigned int ses, u32 secid,
717 struct audit_buffer *audit_buf)
722 audit_log_format(audit_buf, " auid=%u ses=%u",
723 from_kuid(&init_user_ns, auid), ses);
725 security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) {
726 audit_log_format(audit_buf, " subj=%s", secctx);
727 security_release_secctx(secctx, secctx_len);
729 audit_log_task_context(audit_buf);
732 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, kuid_t auid,
733 unsigned int ses, u32 secid);
734 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, kuid_t auid,
735 unsigned int ses, u32 secid);
736 void xfrm_audit_state_add(struct xfrm_state *x, int result, kuid_t auid,
737 unsigned int ses, u32 secid);
738 void xfrm_audit_state_delete(struct xfrm_state *x, int result, kuid_t auid,
739 unsigned int ses, u32 secid);
740 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
741 struct sk_buff *skb);
742 void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
744 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
745 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
747 void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
751 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
752 kuid_t auid, unsigned int ses, u32 secid)
756 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
757 kuid_t auid, unsigned int ses, u32 secid)
761 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
762 kuid_t auid, unsigned int ses, u32 secid)
766 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
767 kuid_t auid, unsigned int ses, u32 secid)
771 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
776 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
777 struct sk_buff *skb, __be32 net_seq)
781 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
786 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
787 __be32 net_spi, __be32 net_seq)
791 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
792 struct sk_buff *skb, u8 proto)
795 #endif /* CONFIG_AUDITSYSCALL */
797 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
799 if (likely(policy != NULL))
800 atomic_inc(&policy->refcnt);
803 void xfrm_policy_destroy(struct xfrm_policy *policy);
805 static inline void xfrm_pol_put(struct xfrm_policy *policy)
807 if (atomic_dec_and_test(&policy->refcnt))
808 xfrm_policy_destroy(policy);
811 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
814 for (i = npols - 1; i >= 0; --i)
815 xfrm_pol_put(pols[i]);
818 void __xfrm_state_destroy(struct xfrm_state *);
820 static inline void __xfrm_state_put(struct xfrm_state *x)
822 atomic_dec(&x->refcnt);
825 static inline void xfrm_state_put(struct xfrm_state *x)
827 if (atomic_dec_and_test(&x->refcnt))
828 __xfrm_state_destroy(x);
831 static inline void xfrm_state_hold(struct xfrm_state *x)
833 atomic_inc(&x->refcnt);
836 static inline bool addr_match(const void *token1, const void *token2,
839 const __be32 *a1 = token1;
840 const __be32 *a2 = token2;
844 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
845 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
848 if (memcmp(a1, a2, pdw << 2))
854 mask = htonl((0xffffffff) << (32 - pbi));
856 if ((a1[pdw] ^ a2[pdw]) & mask)
863 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
865 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
868 return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen)));
872 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
875 switch(fl->flowi_proto) {
878 case IPPROTO_UDPLITE:
880 port = uli->ports.sport;
884 port = htons(uli->icmpt.type);
887 port = htons(uli->mht.type);
890 port = htons(ntohl(uli->gre_key) >> 16);
899 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
902 switch(fl->flowi_proto) {
905 case IPPROTO_UDPLITE:
907 port = uli->ports.dport;
911 port = htons(uli->icmpt.code);
914 port = htons(ntohl(uli->gre_key) & 0xffff);
922 bool xfrm_selector_match(const struct xfrm_selector *sel,
923 const struct flowi *fl, unsigned short family);
925 #ifdef CONFIG_SECURITY_NETWORK_XFRM
926 /* If neither has a context --> match
927 * Otherwise, both must have a context and the sids, doi, alg must match
929 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
931 return ((!s1 && !s2) ||
933 (s1->ctx_sid == s2->ctx_sid) &&
934 (s1->ctx_doi == s2->ctx_doi) &&
935 (s1->ctx_alg == s2->ctx_alg)));
938 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
944 /* A struct encoding bundle of transformations to apply to some set of flow.
946 * dst->child points to the next element of bundle.
947 * dst->xfrm points to an instanse of transformer.
949 * Due to unfortunate limitations of current routing cache, which we
950 * have no time to fix, it mirrors struct rtable and bound to the same
951 * routing key, including saddr,daddr. However, we can have many of
952 * bundles differing by session id. All the bundles grow from a parent
957 struct dst_entry dst;
961 struct dst_entry *route;
962 struct flow_cache_object flo;
963 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
964 int num_pols, num_xfrms;
965 #ifdef CONFIG_XFRM_SUB_POLICY
966 struct flowi *origin;
967 struct xfrm_selector *partner;
971 u32 route_mtu_cached;
972 u32 child_mtu_cached;
978 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
980 xfrm_pols_put(xdst->pols, xdst->num_pols);
981 dst_release(xdst->route);
982 if (likely(xdst->u.dst.xfrm))
983 xfrm_state_put(xdst->u.dst.xfrm);
984 #ifdef CONFIG_XFRM_SUB_POLICY
987 kfree(xdst->partner);
988 xdst->partner = NULL;
993 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
998 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1001 static inline int secpath_exists(struct sk_buff *skb)
1004 return skb->sp != NULL;
1010 static inline struct sec_path *
1011 secpath_get(struct sec_path *sp)
1014 atomic_inc(&sp->refcnt);
1018 void __secpath_destroy(struct sec_path *sp);
1021 secpath_put(struct sec_path *sp)
1023 if (sp && atomic_dec_and_test(&sp->refcnt))
1024 __secpath_destroy(sp);
1027 struct sec_path *secpath_dup(struct sec_path *src);
1030 secpath_reset(struct sk_buff *skb)
1033 secpath_put(skb->sp);
1039 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1043 return addr->a4 == 0;
1045 return ipv6_addr_any((struct in6_addr *)&addr->a6);
1051 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1053 return (tmpl->saddr.a4 &&
1054 tmpl->saddr.a4 != x->props.saddr.a4);
1058 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1060 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1061 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1065 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1069 return __xfrm4_state_addr_cmp(tmpl, x);
1071 return __xfrm6_state_addr_cmp(tmpl, x);
1077 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1078 unsigned short family);
1080 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1081 struct sk_buff *skb,
1082 unsigned int family, int reverse)
1084 struct net *net = dev_net(skb->dev);
1085 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1087 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1088 return __xfrm_policy_check(sk, ndir, skb, family);
1090 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
1091 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1092 __xfrm_policy_check(sk, ndir, skb, family);
1095 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1097 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1100 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1102 return xfrm_policy_check(sk, dir, skb, AF_INET);
1105 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1107 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1110 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1111 struct sk_buff *skb)
1113 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1116 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1117 struct sk_buff *skb)
1119 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1122 int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1123 unsigned int family, int reverse);
1125 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1126 unsigned int family)
1128 return __xfrm_decode_session(skb, fl, family, 0);
1131 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1133 unsigned int family)
1135 return __xfrm_decode_session(skb, fl, family, 1);
1138 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1140 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1142 struct net *net = dev_net(skb->dev);
1144 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1145 (skb_dst(skb)->flags & DST_NOXFRM) ||
1146 __xfrm_route_forward(skb, family);
1149 static inline int xfrm4_route_forward(struct sk_buff *skb)
1151 return xfrm_route_forward(skb, AF_INET);
1154 static inline int xfrm6_route_forward(struct sk_buff *skb)
1156 return xfrm_route_forward(skb, AF_INET6);
1159 int __xfrm_sk_clone_policy(struct sock *sk);
1161 static inline int xfrm_sk_clone_policy(struct sock *sk)
1163 if (unlikely(sk->sk_policy[0] || sk->sk_policy[1]))
1164 return __xfrm_sk_clone_policy(sk);
1168 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1170 static inline void xfrm_sk_free_policy(struct sock *sk)
1172 if (unlikely(sk->sk_policy[0] != NULL)) {
1173 xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX);
1174 sk->sk_policy[0] = NULL;
1176 if (unlikely(sk->sk_policy[1] != NULL)) {
1177 xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1);
1178 sk->sk_policy[1] = NULL;
1182 void xfrm_garbage_collect(struct net *net);
1186 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1187 static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; }
1188 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1189 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1190 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1194 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1198 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1202 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1204 unsigned int family)
1208 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1209 struct sk_buff *skb)
1213 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1214 struct sk_buff *skb)
1218 static inline void xfrm_garbage_collect(struct net *net)
1224 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1228 return (xfrm_address_t *)&fl->u.ip4.daddr;
1230 return (xfrm_address_t *)&fl->u.ip6.daddr;
1236 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1240 return (xfrm_address_t *)&fl->u.ip4.saddr;
1242 return (xfrm_address_t *)&fl->u.ip6.saddr;
1248 void xfrm_flowi_addr_get(const struct flowi *fl,
1249 xfrm_address_t *saddr, xfrm_address_t *daddr,
1250 unsigned short family)
1254 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1255 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1258 *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr;
1259 *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr;
1264 static __inline__ int
1265 __xfrm4_state_addr_check(const struct xfrm_state *x,
1266 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1268 if (daddr->a4 == x->id.daddr.a4 &&
1269 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1274 static __inline__ int
1275 __xfrm6_state_addr_check(const struct xfrm_state *x,
1276 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1278 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1279 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1280 ipv6_addr_any((struct in6_addr *)saddr) ||
1281 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1286 static __inline__ int
1287 xfrm_state_addr_check(const struct xfrm_state *x,
1288 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1289 unsigned short family)
1293 return __xfrm4_state_addr_check(x, daddr, saddr);
1295 return __xfrm6_state_addr_check(x, daddr, saddr);
1300 static __inline__ int
1301 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1302 unsigned short family)
1306 return __xfrm4_state_addr_check(x,
1307 (const xfrm_address_t *)&fl->u.ip4.daddr,
1308 (const xfrm_address_t *)&fl->u.ip4.saddr);
1310 return __xfrm6_state_addr_check(x,
1311 (const xfrm_address_t *)&fl->u.ip6.daddr,
1312 (const xfrm_address_t *)&fl->u.ip6.saddr);
1317 static inline int xfrm_state_kern(const struct xfrm_state *x)
1319 return atomic_read(&x->tunnel_users);
1322 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1324 return (!userproto || proto == userproto ||
1325 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1326 proto == IPPROTO_ESP ||
1327 proto == IPPROTO_COMP)));
1331 * xfrm algorithm information
1333 struct xfrm_algo_aead_info {
1337 struct xfrm_algo_auth_info {
1342 struct xfrm_algo_encr_info {
1347 struct xfrm_algo_comp_info {
1351 struct xfrm_algo_desc {
1355 u8 pfkey_supported:1;
1357 struct xfrm_algo_aead_info aead;
1358 struct xfrm_algo_auth_info auth;
1359 struct xfrm_algo_encr_info encr;
1360 struct xfrm_algo_comp_info comp;
1362 struct sadb_alg desc;
1365 /* XFRM protocol handlers. */
1366 struct xfrm4_protocol {
1367 int (*handler)(struct sk_buff *skb);
1368 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1370 int (*cb_handler)(struct sk_buff *skb, int err);
1371 int (*err_handler)(struct sk_buff *skb, u32 info);
1373 struct xfrm4_protocol __rcu *next;
1377 /* XFRM tunnel handlers. */
1378 struct xfrm_tunnel {
1379 int (*handler)(struct sk_buff *skb);
1380 int (*err_handler)(struct sk_buff *skb, u32 info);
1382 struct xfrm_tunnel __rcu *next;
1386 struct xfrm_tunnel_notifier {
1387 int (*handler)(struct sk_buff *skb);
1388 struct xfrm_tunnel_notifier __rcu *next;
1392 struct xfrm6_tunnel {
1393 int (*handler)(struct sk_buff *skb);
1394 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1395 u8 type, u8 code, int offset, __be32 info);
1396 struct xfrm6_tunnel __rcu *next;
1400 void xfrm_init(void);
1401 void xfrm4_init(void);
1402 int xfrm_state_init(struct net *net);
1403 void xfrm_state_fini(struct net *net);
1404 void xfrm4_state_init(void);
1405 void xfrm4_protocol_init(void);
1407 int xfrm6_init(void);
1408 void xfrm6_fini(void);
1409 int xfrm6_state_init(void);
1410 void xfrm6_state_fini(void);
1412 static inline int xfrm6_init(void)
1416 static inline void xfrm6_fini(void)
1422 #ifdef CONFIG_XFRM_STATISTICS
1423 int xfrm_proc_init(struct net *net);
1424 void xfrm_proc_fini(struct net *net);
1427 int xfrm_sysctl_init(struct net *net);
1428 #ifdef CONFIG_SYSCTL
1429 void xfrm_sysctl_fini(struct net *net);
1431 static inline void xfrm_sysctl_fini(struct net *net)
1436 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1437 struct xfrm_address_filter *filter);
1438 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1439 int (*func)(struct xfrm_state *, int, void*), void *);
1440 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1441 struct xfrm_state *xfrm_state_alloc(struct net *net);
1442 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1443 const xfrm_address_t *saddr,
1444 const struct flowi *fl,
1445 struct xfrm_tmpl *tmpl,
1446 struct xfrm_policy *pol, int *err,
1447 unsigned short family);
1448 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1449 xfrm_address_t *daddr,
1450 xfrm_address_t *saddr,
1451 unsigned short family,
1452 u8 mode, u8 proto, u32 reqid);
1453 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1454 unsigned short family);
1455 int xfrm_state_check_expire(struct xfrm_state *x);
1456 void xfrm_state_insert(struct xfrm_state *x);
1457 int xfrm_state_add(struct xfrm_state *x);
1458 int xfrm_state_update(struct xfrm_state *x);
1459 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1460 const xfrm_address_t *daddr, __be32 spi,
1461 u8 proto, unsigned short family);
1462 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1463 const xfrm_address_t *daddr,
1464 const xfrm_address_t *saddr,
1466 unsigned short family);
1467 #ifdef CONFIG_XFRM_SUB_POLICY
1468 int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1469 unsigned short family, struct net *net);
1470 int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1471 unsigned short family);
1473 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1474 int n, unsigned short family, struct net *net)
1479 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1480 int n, unsigned short family)
1486 struct xfrmk_sadinfo {
1487 u32 sadhcnt; /* current hash bkts */
1488 u32 sadhmcnt; /* max allowed hash bkts */
1489 u32 sadcnt; /* current running count */
1492 struct xfrmk_spdinfo {
1503 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1504 int xfrm_state_delete(struct xfrm_state *x);
1505 int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info);
1506 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1507 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1508 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1509 int xfrm_init_replay(struct xfrm_state *x);
1510 int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1511 int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
1512 int xfrm_init_state(struct xfrm_state *x);
1513 int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1514 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1515 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1516 int xfrm_output_resume(struct sk_buff *skb, int err);
1517 int xfrm_output(struct sk_buff *skb);
1518 int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1519 void xfrm_local_error(struct sk_buff *skb, int mtu);
1520 int xfrm4_extract_header(struct sk_buff *skb);
1521 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1522 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1524 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1525 int xfrm4_rcv(struct sk_buff *skb);
1527 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1529 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1530 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1531 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1532 return xfrm_input(skb, nexthdr, spi, 0);
1535 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1536 int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1537 int xfrm4_output(struct sk_buff *skb);
1538 int xfrm4_output_finish(struct sk_buff *skb);
1539 int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1540 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1541 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1542 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1543 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1544 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1545 int xfrm6_mode_tunnel_input_register(struct xfrm_tunnel_notifier *handler);
1546 int xfrm6_mode_tunnel_input_deregister(struct xfrm_tunnel_notifier *handler);
1547 int xfrm6_extract_header(struct sk_buff *skb);
1548 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1549 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi);
1550 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1551 int xfrm6_rcv(struct sk_buff *skb);
1552 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1553 xfrm_address_t *saddr, u8 proto);
1554 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1555 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1556 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1557 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1558 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1559 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1560 int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1561 int xfrm6_output(struct sk_buff *skb);
1562 int xfrm6_output_finish(struct sk_buff *skb);
1563 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1567 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1568 int xfrm_user_policy(struct sock *sk, int optname,
1569 u8 __user *optval, int optlen);
1571 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1573 return -ENOPROTOOPT;
1576 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1578 /* should not happen */
1584 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1586 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1587 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1588 int (*func)(struct xfrm_policy *, int, int, void*),
1590 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1591 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1592 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1594 struct xfrm_selector *sel,
1595 struct xfrm_sec_ctx *ctx, int delete,
1597 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir,
1598 u32 id, int delete, int *err);
1599 int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info);
1600 u32 xfrm_get_acqseq(void);
1601 int verify_spi_info(u8 proto, u32 min, u32 max);
1602 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1603 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1604 u8 mode, u32 reqid, u8 proto,
1605 const xfrm_address_t *daddr,
1606 const xfrm_address_t *saddr, int create,
1607 unsigned short family);
1608 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1610 #ifdef CONFIG_XFRM_MIGRATE
1611 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1612 const struct xfrm_migrate *m, int num_bundles,
1613 const struct xfrm_kmaddress *k);
1614 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1615 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1616 struct xfrm_migrate *m);
1617 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1618 struct xfrm_migrate *m, int num_bundles,
1619 struct xfrm_kmaddress *k, struct net *net);
1622 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1623 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1624 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1625 xfrm_address_t *addr);
1627 void xfrm_input_init(void);
1628 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1630 void xfrm_probe_algs(void);
1631 int xfrm_count_pfkey_auth_supported(void);
1632 int xfrm_count_pfkey_enc_supported(void);
1633 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1634 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1635 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1636 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1637 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1638 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1639 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1640 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1641 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1644 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1645 const xfrm_address_t *b)
1647 return ipv6_addr_equal((const struct in6_addr *)a,
1648 (const struct in6_addr *)b);
1651 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1652 const xfrm_address_t *b,
1658 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1660 return xfrm6_addr_equal(a, b);
1664 static inline int xfrm_policy_id2dir(u32 index)
1670 static inline int xfrm_aevent_is_on(struct net *net)
1676 nlsk = rcu_dereference(net->xfrm.nlsk);
1678 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1683 static inline int xfrm_acquire_is_on(struct net *net)
1689 nlsk = rcu_dereference(net->xfrm.nlsk);
1691 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1698 static inline int xfrm_alg_len(const struct xfrm_algo *alg)
1700 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1703 static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1705 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1708 static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1710 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1713 #ifdef CONFIG_XFRM_MIGRATE
1714 static inline int xfrm_replay_clone(struct xfrm_state *x,
1715 struct xfrm_state *orig)
1717 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1722 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1723 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1725 x->preplay_esn = kmemdup(x->replay_esn,
1726 xfrm_replay_state_esn_len(x->replay_esn),
1728 if (!x->preplay_esn) {
1729 kfree(x->replay_esn);
1736 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1738 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1741 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1743 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1746 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1749 for (i = 0; i < n; i++)
1750 xfrm_state_put(*(states + i));
1753 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1756 for (i = 0; i < n; i++)
1757 xfrm_state_delete(*(states + i));
1762 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1764 return skb->sp->xvec[skb->sp->len - 1];
1768 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1770 if (attrs[XFRMA_MARK])
1771 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1778 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1783 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1787 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1788 unsigned int family)
1790 bool tunnel = false;
1794 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
1798 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
1802 if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL))
1807 #endif /* _NET_XFRM_H */