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. */
129 possible_net_t xs_net;
131 struct hlist_node gclist;
132 struct hlist_node bydst;
134 struct hlist_node bysrc;
135 struct hlist_node byspi;
141 struct xfrm_selector sel;
142 struct xfrm_mark mark;
147 /* Key manager bits */
148 struct xfrm_state_walk km;
150 /* Parameters of this state. */
155 u8 aalgo, ealgo, calgo;
158 xfrm_address_t saddr;
164 struct xfrm_lifetime_cfg lft;
166 /* Data for transformer */
167 struct xfrm_algo_auth *aalg;
168 struct xfrm_algo *ealg;
169 struct xfrm_algo *calg;
170 struct xfrm_algo_aead *aead;
173 /* Data for encapsulator */
174 struct xfrm_encap_tmpl *encap;
176 /* Data for care-of address */
177 xfrm_address_t *coaddr;
179 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
180 struct xfrm_state *tunnel;
182 /* If a tunnel, number of users + 1 */
183 atomic_t tunnel_users;
185 /* State for replay detection */
186 struct xfrm_replay_state replay;
187 struct xfrm_replay_state_esn *replay_esn;
189 /* Replay detection state at the time we sent the last notification */
190 struct xfrm_replay_state preplay;
191 struct xfrm_replay_state_esn *preplay_esn;
193 /* The functions for replay detection. */
194 struct xfrm_replay *repl;
196 /* internal flag that only holds state for delayed aevent at the
201 /* Replay detection notification settings */
205 /* Replay detection notification timer */
206 struct timer_list rtimer;
209 struct xfrm_stats stats;
211 struct xfrm_lifetime_cur curlft;
212 struct tasklet_hrtimer mtimer;
214 /* used to fix curlft->add_time when changing date */
218 unsigned long lastused;
220 /* Reference to data common to all the instances of this
222 const struct xfrm_type *type;
223 struct xfrm_mode *inner_mode;
224 struct xfrm_mode *inner_mode_iaf;
225 struct xfrm_mode *outer_mode;
227 /* Security context */
228 struct xfrm_sec_ctx *security;
230 /* Private data of this transformer, format is opaque,
231 * interpreted by xfrm_type methods. */
235 static inline struct net *xs_net(struct xfrm_state *x)
237 return read_pnet(&x->xs_net);
240 /* xflags - make enum if more show up */
241 #define XFRM_TIME_DEFER 1
242 #define XFRM_SOFT_EXPIRE 2
253 /* callback structure passed from either netlink or pfkey */
270 void (*advance)(struct xfrm_state *x, __be32 net_seq);
271 int (*check)(struct xfrm_state *x,
274 int (*recheck)(struct xfrm_state *x,
277 void (*notify)(struct xfrm_state *x, int event);
278 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
284 struct xfrm_policy_afinfo {
285 unsigned short family;
286 struct dst_ops *dst_ops;
287 void (*garbage_collect)(struct net *net);
288 struct dst_entry *(*dst_lookup)(struct net *net,
290 const xfrm_address_t *saddr,
291 const xfrm_address_t *daddr);
292 int (*get_saddr)(struct net *net, int oif,
293 xfrm_address_t *saddr,
294 xfrm_address_t *daddr);
295 void (*decode_session)(struct sk_buff *skb,
298 int (*get_tos)(const struct flowi *fl);
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 net *net, struct sock *sk, struct sk_buff *skb);
337 int (*output_finish)(struct sock *sk, 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;
525 possible_net_t xp_net;
526 struct hlist_node bydst;
527 struct hlist_node byidx;
529 /* This lock only affects elements except for entry. */
532 struct timer_list timer;
534 struct flow_cache_object flo;
538 struct xfrm_mark mark;
539 struct xfrm_selector selector;
540 struct xfrm_lifetime_cfg lft;
541 struct xfrm_lifetime_cur curlft;
542 struct xfrm_policy_walk_entry walk;
543 struct xfrm_policy_queue polq;
549 struct xfrm_sec_ctx *security;
550 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
554 static inline struct net *xp_net(const struct xfrm_policy *xp)
556 return read_pnet(&xp->xp_net);
559 struct xfrm_kmaddress {
560 xfrm_address_t local;
561 xfrm_address_t remote;
566 struct xfrm_migrate {
567 xfrm_address_t old_daddr;
568 xfrm_address_t old_saddr;
569 xfrm_address_t new_daddr;
570 xfrm_address_t new_saddr;
579 #define XFRM_KM_TIMEOUT 30
581 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
582 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
584 /* default aevent timeout in units of 100ms */
585 #define XFRM_AE_ETIME 10
586 /* Async Event timer multiplier */
587 #define XFRM_AE_ETH_M 10
588 /* default seq threshold size */
589 #define XFRM_AE_SEQT_SIZE 2
592 struct list_head list;
594 int (*notify)(struct xfrm_state *x, const struct km_event *c);
595 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
596 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
597 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
598 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
599 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
600 int (*migrate)(const struct xfrm_selector *sel,
602 const struct xfrm_migrate *m,
604 const struct xfrm_kmaddress *k);
605 bool (*is_alive)(const struct km_event *c);
608 int xfrm_register_km(struct xfrm_mgr *km);
609 int xfrm_unregister_km(struct xfrm_mgr *km);
611 struct xfrm_tunnel_skb_cb {
613 struct inet_skb_parm h4;
614 struct inet6_skb_parm h6;
618 struct ip_tunnel *ip4;
623 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
626 * This structure is used for the duration where packets are being
627 * transformed by IPsec. As soon as the packet leaves IPsec the
628 * area beyond the generic IP part may be overwritten.
631 struct xfrm_tunnel_skb_cb header;
633 /* Sequence number for replay protection. */
646 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
649 * This structure is used by the afinfo prepare_input/prepare_output functions
650 * to transmit header information to the mode input/output functions.
652 struct xfrm_mode_skb_cb {
653 struct xfrm_tunnel_skb_cb header;
655 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
659 /* IP header length (excluding options or extension headers). */
662 /* TOS for IPv4, class for IPv6. */
665 /* TTL for IPv4, hop limitfor IPv6. */
668 /* Protocol for IPv4, NH for IPv6. */
671 /* Option length for IPv4, zero for IPv6. */
674 /* Used by IPv6 only, zero for IPv4. */
678 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
681 * This structure is used by the input processing to locate the SPI and
682 * related information.
684 struct xfrm_spi_skb_cb {
685 struct xfrm_tunnel_skb_cb header;
687 unsigned int daddroff;
691 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
693 #ifdef CONFIG_AUDITSYSCALL
694 static inline struct audit_buffer *xfrm_audit_start(const char *op)
696 struct audit_buffer *audit_buf = NULL;
698 if (audit_enabled == 0)
700 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
701 AUDIT_MAC_IPSEC_EVENT);
702 if (audit_buf == NULL)
704 audit_log_format(audit_buf, "op=%s", op);
708 static inline void xfrm_audit_helper_usrinfo(bool task_valid,
709 struct audit_buffer *audit_buf)
711 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
712 audit_get_loginuid(current) :
714 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
717 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
718 audit_log_task_context(audit_buf);
721 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
722 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
724 void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
725 void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
726 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
727 struct sk_buff *skb);
728 void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
730 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
731 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
733 void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
737 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
742 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
747 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
752 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
757 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
762 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
763 struct sk_buff *skb, __be32 net_seq)
767 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
772 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
773 __be32 net_spi, __be32 net_seq)
777 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
778 struct sk_buff *skb, u8 proto)
781 #endif /* CONFIG_AUDITSYSCALL */
783 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
785 if (likely(policy != NULL))
786 atomic_inc(&policy->refcnt);
789 void xfrm_policy_destroy(struct xfrm_policy *policy);
791 static inline void xfrm_pol_put(struct xfrm_policy *policy)
793 if (atomic_dec_and_test(&policy->refcnt))
794 xfrm_policy_destroy(policy);
797 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
800 for (i = npols - 1; i >= 0; --i)
801 xfrm_pol_put(pols[i]);
804 void __xfrm_state_destroy(struct xfrm_state *);
806 static inline void __xfrm_state_put(struct xfrm_state *x)
808 atomic_dec(&x->refcnt);
811 static inline void xfrm_state_put(struct xfrm_state *x)
813 if (atomic_dec_and_test(&x->refcnt))
814 __xfrm_state_destroy(x);
817 static inline void xfrm_state_hold(struct xfrm_state *x)
819 atomic_inc(&x->refcnt);
822 static inline bool addr_match(const void *token1, const void *token2,
825 const __be32 *a1 = token1;
826 const __be32 *a2 = token2;
830 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
831 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
834 if (memcmp(a1, a2, pdw << 2))
840 mask = htonl((0xffffffff) << (32 - pbi));
842 if ((a1[pdw] ^ a2[pdw]) & mask)
849 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
851 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
854 return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen)));
858 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
861 switch(fl->flowi_proto) {
864 case IPPROTO_UDPLITE:
866 port = uli->ports.sport;
870 port = htons(uli->icmpt.type);
873 port = htons(uli->mht.type);
876 port = htons(ntohl(uli->gre_key) >> 16);
885 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
888 switch(fl->flowi_proto) {
891 case IPPROTO_UDPLITE:
893 port = uli->ports.dport;
897 port = htons(uli->icmpt.code);
900 port = htons(ntohl(uli->gre_key) & 0xffff);
908 bool xfrm_selector_match(const struct xfrm_selector *sel,
909 const struct flowi *fl, unsigned short family);
911 #ifdef CONFIG_SECURITY_NETWORK_XFRM
912 /* If neither has a context --> match
913 * Otherwise, both must have a context and the sids, doi, alg must match
915 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
917 return ((!s1 && !s2) ||
919 (s1->ctx_sid == s2->ctx_sid) &&
920 (s1->ctx_doi == s2->ctx_doi) &&
921 (s1->ctx_alg == s2->ctx_alg)));
924 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
930 /* A struct encoding bundle of transformations to apply to some set of flow.
932 * dst->child points to the next element of bundle.
933 * dst->xfrm points to an instanse of transformer.
935 * Due to unfortunate limitations of current routing cache, which we
936 * have no time to fix, it mirrors struct rtable and bound to the same
937 * routing key, including saddr,daddr. However, we can have many of
938 * bundles differing by session id. All the bundles grow from a parent
943 struct dst_entry dst;
947 struct dst_entry *route;
948 struct flow_cache_object flo;
949 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
950 int num_pols, num_xfrms;
953 u32 route_mtu_cached;
954 u32 child_mtu_cached;
960 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
962 xfrm_pols_put(xdst->pols, xdst->num_pols);
963 dst_release(xdst->route);
964 if (likely(xdst->u.dst.xfrm))
965 xfrm_state_put(xdst->u.dst.xfrm);
969 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
974 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
977 static inline int secpath_exists(struct sk_buff *skb)
980 return skb->sp != NULL;
986 static inline struct sec_path *
987 secpath_get(struct sec_path *sp)
990 atomic_inc(&sp->refcnt);
994 void __secpath_destroy(struct sec_path *sp);
997 secpath_put(struct sec_path *sp)
999 if (sp && atomic_dec_and_test(&sp->refcnt))
1000 __secpath_destroy(sp);
1003 struct sec_path *secpath_dup(struct sec_path *src);
1006 secpath_reset(struct sk_buff *skb)
1009 secpath_put(skb->sp);
1015 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1019 return addr->a4 == 0;
1021 return ipv6_addr_any(&addr->in6);
1027 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1029 return (tmpl->saddr.a4 &&
1030 tmpl->saddr.a4 != x->props.saddr.a4);
1034 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1036 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1037 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1041 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1045 return __xfrm4_state_addr_cmp(tmpl, x);
1047 return __xfrm6_state_addr_cmp(tmpl, x);
1053 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1054 unsigned short family);
1056 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1057 struct sk_buff *skb,
1058 unsigned int family, int reverse)
1060 struct net *net = dev_net(skb->dev);
1061 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1063 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1064 return __xfrm_policy_check(sk, ndir, skb, family);
1066 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
1067 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1068 __xfrm_policy_check(sk, ndir, skb, family);
1071 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1073 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1076 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1078 return xfrm_policy_check(sk, dir, skb, AF_INET);
1081 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1083 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1086 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1087 struct sk_buff *skb)
1089 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1092 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1093 struct sk_buff *skb)
1095 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1098 int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1099 unsigned int family, int reverse);
1101 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1102 unsigned int family)
1104 return __xfrm_decode_session(skb, fl, family, 0);
1107 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1109 unsigned int family)
1111 return __xfrm_decode_session(skb, fl, family, 1);
1114 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1116 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1118 struct net *net = dev_net(skb->dev);
1120 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1121 (skb_dst(skb)->flags & DST_NOXFRM) ||
1122 __xfrm_route_forward(skb, family);
1125 static inline int xfrm4_route_forward(struct sk_buff *skb)
1127 return xfrm_route_forward(skb, AF_INET);
1130 static inline int xfrm6_route_forward(struct sk_buff *skb)
1132 return xfrm_route_forward(skb, AF_INET6);
1135 int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1137 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1139 sk->sk_policy[0] = NULL;
1140 sk->sk_policy[1] = NULL;
1141 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1142 return __xfrm_sk_clone_policy(sk, osk);
1146 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1148 static inline void xfrm_sk_free_policy(struct sock *sk)
1150 struct xfrm_policy *pol;
1152 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1153 if (unlikely(pol != NULL)) {
1154 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1155 sk->sk_policy[0] = NULL;
1157 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1158 if (unlikely(pol != NULL)) {
1159 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1160 sk->sk_policy[1] = NULL;
1164 void xfrm_garbage_collect(struct net *net);
1168 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1169 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1170 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1171 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1172 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1176 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1180 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1184 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1186 unsigned int family)
1190 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1191 struct sk_buff *skb)
1195 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1196 struct sk_buff *skb)
1200 static inline void xfrm_garbage_collect(struct net *net)
1206 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1210 return (xfrm_address_t *)&fl->u.ip4.daddr;
1212 return (xfrm_address_t *)&fl->u.ip6.daddr;
1218 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1222 return (xfrm_address_t *)&fl->u.ip4.saddr;
1224 return (xfrm_address_t *)&fl->u.ip6.saddr;
1230 void xfrm_flowi_addr_get(const struct flowi *fl,
1231 xfrm_address_t *saddr, xfrm_address_t *daddr,
1232 unsigned short family)
1236 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1237 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1240 saddr->in6 = fl->u.ip6.saddr;
1241 daddr->in6 = fl->u.ip6.daddr;
1246 static __inline__ int
1247 __xfrm4_state_addr_check(const struct xfrm_state *x,
1248 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1250 if (daddr->a4 == x->id.daddr.a4 &&
1251 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1256 static __inline__ int
1257 __xfrm6_state_addr_check(const struct xfrm_state *x,
1258 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1260 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1261 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1262 ipv6_addr_any((struct in6_addr *)saddr) ||
1263 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1268 static __inline__ int
1269 xfrm_state_addr_check(const struct xfrm_state *x,
1270 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1271 unsigned short family)
1275 return __xfrm4_state_addr_check(x, daddr, saddr);
1277 return __xfrm6_state_addr_check(x, daddr, saddr);
1282 static __inline__ int
1283 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1284 unsigned short family)
1288 return __xfrm4_state_addr_check(x,
1289 (const xfrm_address_t *)&fl->u.ip4.daddr,
1290 (const xfrm_address_t *)&fl->u.ip4.saddr);
1292 return __xfrm6_state_addr_check(x,
1293 (const xfrm_address_t *)&fl->u.ip6.daddr,
1294 (const xfrm_address_t *)&fl->u.ip6.saddr);
1299 static inline int xfrm_state_kern(const struct xfrm_state *x)
1301 return atomic_read(&x->tunnel_users);
1304 static inline bool xfrm_id_proto_valid(u8 proto)
1310 #if IS_ENABLED(CONFIG_IPV6)
1311 case IPPROTO_ROUTING:
1312 case IPPROTO_DSTOPTS:
1320 /* IPSEC_PROTO_ANY only matches 3 IPsec protocols, 0 could match all. */
1321 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1323 return (!userproto || proto == userproto ||
1324 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1325 proto == IPPROTO_ESP ||
1326 proto == IPPROTO_COMP)));
1330 * xfrm algorithm information
1332 struct xfrm_algo_aead_info {
1337 struct xfrm_algo_auth_info {
1342 struct xfrm_algo_encr_info {
1348 struct xfrm_algo_comp_info {
1352 struct xfrm_algo_desc {
1356 u8 pfkey_supported:1;
1358 struct xfrm_algo_aead_info aead;
1359 struct xfrm_algo_auth_info auth;
1360 struct xfrm_algo_encr_info encr;
1361 struct xfrm_algo_comp_info comp;
1363 struct sadb_alg desc;
1366 /* XFRM protocol handlers. */
1367 struct xfrm4_protocol {
1368 int (*handler)(struct sk_buff *skb);
1369 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1371 int (*cb_handler)(struct sk_buff *skb, int err);
1372 int (*err_handler)(struct sk_buff *skb, u32 info);
1374 struct xfrm4_protocol __rcu *next;
1378 struct xfrm6_protocol {
1379 int (*handler)(struct sk_buff *skb);
1380 int (*cb_handler)(struct sk_buff *skb, int err);
1381 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1382 u8 type, u8 code, int offset, __be32 info);
1384 struct xfrm6_protocol __rcu *next;
1388 /* XFRM tunnel handlers. */
1389 struct xfrm_tunnel {
1390 int (*handler)(struct sk_buff *skb);
1391 int (*err_handler)(struct sk_buff *skb, u32 info);
1393 struct xfrm_tunnel __rcu *next;
1397 struct xfrm6_tunnel {
1398 int (*handler)(struct sk_buff *skb);
1399 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1400 u8 type, u8 code, int offset, __be32 info);
1401 struct xfrm6_tunnel __rcu *next;
1405 void xfrm_init(void);
1406 void xfrm4_init(void);
1407 int xfrm_state_init(struct net *net);
1408 void xfrm_state_fini(struct net *net);
1409 void xfrm4_state_init(void);
1410 void xfrm4_protocol_init(void);
1412 int xfrm6_init(void);
1413 void xfrm6_fini(void);
1414 int xfrm6_state_init(void);
1415 void xfrm6_state_fini(void);
1416 int xfrm6_protocol_init(void);
1417 void xfrm6_protocol_fini(void);
1419 static inline int xfrm6_init(void)
1423 static inline void xfrm6_fini(void)
1429 #ifdef CONFIG_XFRM_STATISTICS
1430 int xfrm_proc_init(struct net *net);
1431 void xfrm_proc_fini(struct net *net);
1434 int xfrm_sysctl_init(struct net *net);
1435 #ifdef CONFIG_SYSCTL
1436 void xfrm_sysctl_fini(struct net *net);
1438 static inline void xfrm_sysctl_fini(struct net *net)
1443 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1444 struct xfrm_address_filter *filter);
1445 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1446 int (*func)(struct xfrm_state *, int, void*), void *);
1447 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1448 struct xfrm_state *xfrm_state_alloc(struct net *net);
1449 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1450 const xfrm_address_t *saddr,
1451 const struct flowi *fl,
1452 struct xfrm_tmpl *tmpl,
1453 struct xfrm_policy *pol, int *err,
1454 unsigned short family);
1455 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1456 xfrm_address_t *daddr,
1457 xfrm_address_t *saddr,
1458 unsigned short family,
1459 u8 mode, u8 proto, u32 reqid);
1460 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1461 unsigned short family);
1462 int xfrm_state_check_expire(struct xfrm_state *x);
1463 void xfrm_state_insert(struct xfrm_state *x);
1464 int xfrm_state_add(struct xfrm_state *x);
1465 int xfrm_state_update(struct xfrm_state *x);
1466 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1467 const xfrm_address_t *daddr, __be32 spi,
1468 u8 proto, unsigned short family);
1469 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1470 const xfrm_address_t *daddr,
1471 const xfrm_address_t *saddr,
1473 unsigned short family);
1474 #ifdef CONFIG_XFRM_SUB_POLICY
1475 int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1476 unsigned short family, struct net *net);
1477 int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1478 unsigned short family);
1480 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1481 int n, unsigned short family, struct net *net)
1486 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1487 int n, unsigned short family)
1493 struct xfrmk_sadinfo {
1494 u32 sadhcnt; /* current hash bkts */
1495 u32 sadhmcnt; /* max allowed hash bkts */
1496 u32 sadcnt; /* current running count */
1499 struct xfrmk_spdinfo {
1510 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1511 int xfrm_state_delete(struct xfrm_state *x);
1512 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid);
1513 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1514 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1515 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1516 int xfrm_init_replay(struct xfrm_state *x);
1517 int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1518 int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
1519 int xfrm_init_state(struct xfrm_state *x);
1520 int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1521 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1522 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1523 int xfrm_output_resume(struct sk_buff *skb, int err);
1524 int xfrm_output(struct sock *sk, struct sk_buff *skb);
1525 int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1526 void xfrm_local_error(struct sk_buff *skb, int mtu);
1527 int xfrm4_extract_header(struct sk_buff *skb);
1528 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1529 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1531 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1532 int xfrm4_rcv(struct sk_buff *skb);
1534 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1536 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1537 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1538 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1539 return xfrm_input(skb, nexthdr, spi, 0);
1542 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1543 int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1544 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1545 int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1546 int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1547 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1548 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1549 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1550 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1551 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1552 int xfrm6_extract_header(struct sk_buff *skb);
1553 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1554 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1556 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1557 int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1558 int xfrm6_rcv(struct sk_buff *skb);
1559 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1560 xfrm_address_t *saddr, u8 proto);
1561 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1562 int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1563 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1564 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1565 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1566 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1567 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1568 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1569 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1570 int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1571 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1572 int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1573 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1577 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1578 int xfrm_user_policy(struct sock *sk, int optname,
1579 u8 __user *optval, int optlen);
1581 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1583 return -ENOPROTOOPT;
1586 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1588 /* should not happen */
1594 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1596 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1597 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1598 int (*func)(struct xfrm_policy *, int, int, void*),
1600 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1601 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1602 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1604 struct xfrm_selector *sel,
1605 struct xfrm_sec_ctx *ctx, int delete,
1607 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir,
1608 u32 id, int delete, int *err);
1609 int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1610 void xfrm_policy_hash_rebuild(struct net *net);
1611 u32 xfrm_get_acqseq(void);
1612 int verify_spi_info(u8 proto, u32 min, u32 max);
1613 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1614 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1615 u8 mode, u32 reqid, u8 proto,
1616 const xfrm_address_t *daddr,
1617 const xfrm_address_t *saddr, int create,
1618 unsigned short family);
1619 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1621 #ifdef CONFIG_XFRM_MIGRATE
1622 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1623 const struct xfrm_migrate *m, int num_bundles,
1624 const struct xfrm_kmaddress *k);
1625 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1626 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1627 struct xfrm_migrate *m);
1628 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1629 struct xfrm_migrate *m, int num_bundles,
1630 struct xfrm_kmaddress *k, struct net *net);
1633 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1634 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1635 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1636 xfrm_address_t *addr);
1638 void xfrm_input_init(void);
1639 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1641 void xfrm_probe_algs(void);
1642 int xfrm_count_pfkey_auth_supported(void);
1643 int xfrm_count_pfkey_enc_supported(void);
1644 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1645 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1646 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1647 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1648 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1649 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1650 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1651 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1652 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1655 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1656 const xfrm_address_t *b)
1658 return ipv6_addr_equal((const struct in6_addr *)a,
1659 (const struct in6_addr *)b);
1662 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1663 const xfrm_address_t *b,
1669 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1671 return xfrm6_addr_equal(a, b);
1675 static inline int xfrm_policy_id2dir(u32 index)
1681 static inline int xfrm_aevent_is_on(struct net *net)
1687 nlsk = rcu_dereference(net->xfrm.nlsk);
1689 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1694 static inline int xfrm_acquire_is_on(struct net *net)
1700 nlsk = rcu_dereference(net->xfrm.nlsk);
1702 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1709 static inline int aead_len(struct xfrm_algo_aead *alg)
1711 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1714 static inline int xfrm_alg_len(const struct xfrm_algo *alg)
1716 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1719 static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1721 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1724 static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1726 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1729 #ifdef CONFIG_XFRM_MIGRATE
1730 static inline int xfrm_replay_clone(struct xfrm_state *x,
1731 struct xfrm_state *orig)
1734 x->replay_esn = kmemdup(orig->replay_esn,
1735 xfrm_replay_state_esn_len(orig->replay_esn),
1739 x->preplay_esn = kmemdup(orig->preplay_esn,
1740 xfrm_replay_state_esn_len(orig->preplay_esn),
1742 if (!x->preplay_esn)
1748 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1750 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1754 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1756 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1759 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1761 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1764 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1767 for (i = 0; i < n; i++)
1768 xfrm_state_put(*(states + i));
1771 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1774 for (i = 0; i < n; i++)
1775 xfrm_state_delete(*(states + i));
1780 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1782 return skb->sp->xvec[skb->sp->len - 1];
1786 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1788 if (attrs[XFRMA_MARK])
1789 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1796 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1801 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1805 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1806 unsigned int family)
1808 bool tunnel = false;
1812 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
1816 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
1820 if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL))
1825 #endif /* _NET_XFRM_H */