1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <linux/compiler.h>
6 #include <linux/xfrm.h>
7 #include <linux/spinlock.h>
8 #include <linux/list.h>
9 #include <linux/skbuff.h>
10 #include <linux/socket.h>
11 #include <linux/pfkeyv2.h>
12 #include <linux/ipsec.h>
13 #include <linux/in6.h>
14 #include <linux/mutex.h>
15 #include <linux/audit.h>
16 #include <linux/slab.h>
17 #include <linux/refcount.h>
22 #include <net/route.h>
24 #include <net/ip6_fib.h>
26 #include <net/gro_cells.h>
28 #include <linux/interrupt.h>
30 #ifdef CONFIG_XFRM_STATISTICS
34 #define XFRM_PROTO_ESP 50
35 #define XFRM_PROTO_AH 51
36 #define XFRM_PROTO_COMP 108
37 #define XFRM_PROTO_IPIP 4
38 #define XFRM_PROTO_IPV6 41
39 #define XFRM_PROTO_ROUTING IPPROTO_ROUTING
40 #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
42 #define XFRM_ALIGN4(len) (((len) + 3) & ~3)
43 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
44 #define MODULE_ALIAS_XFRM_MODE(family, encap) \
45 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
46 #define MODULE_ALIAS_XFRM_TYPE(family, proto) \
47 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
48 #define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \
49 MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto))
51 #ifdef CONFIG_XFRM_STATISTICS
52 #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
54 #define XFRM_INC_STATS(net, field) ((void)(net))
58 /* Organization of SPD aka "XFRM rules"
59 ------------------------------------
62 - policy rule, struct xfrm_policy (=SPD entry)
63 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
64 - instance of a transformer, struct xfrm_state (=SA)
65 - template to clone xfrm_state, struct xfrm_tmpl
67 SPD is plain linear list of xfrm_policy rules, ordered by priority.
68 (To be compatible with existing pfkeyv2 implementations,
69 many rules with priority of 0x7fffffff are allowed to exist and
70 such rules are ordered in an unpredictable way, thanks to bsd folks.)
72 Lookup is plain linear search until the first match with selector.
74 If "action" is "block", then we prohibit the flow, otherwise:
75 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
76 policy entry has list of up to XFRM_MAX_DEPTH transformations,
77 described by templates xfrm_tmpl. Each template is resolved
78 to a complete xfrm_state (see below) and we pack bundle of transformations
79 to a dst_entry returned to requestor.
81 dst -. xfrm .-> xfrm_state #1
82 |---. child .-> dst -. xfrm .-> xfrm_state #2
83 |---. child .-> dst -. xfrm .-> xfrm_state #3
86 Bundles are cached at xrfm_policy struct (field ->bundles).
89 Resolution of xrfm_tmpl
90 -----------------------
92 1. ->mode Mode: transport or tunnel
93 2. ->id.proto Protocol: AH/ESP/IPCOMP
94 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
95 Q: allow to resolve security gateway?
96 4. ->id.spi If not zero, static SPI.
97 5. ->saddr Local tunnel endpoint, ignored for transport mode.
98 6. ->algos List of allowed algos. Plain bitmask now.
99 Q: ealgos, aalgos, calgos. What a mess...
100 7. ->share Sharing mode.
101 Q: how to implement private sharing mode? To add struct sock* to
104 Having this template we search through SAD searching for entries
105 with appropriate mode/proto/algo, permitted by selector.
106 If no appropriate entry found, it is requested from key manager.
109 Q: How to find all the bundles referring to a physical path for
110 PMTU discovery? Seems, dst should contain list of all parents...
111 and enter to infinite locking hierarchy disaster.
112 No! It is easier, we will not search for them, let them find us.
113 We add genid to each dst plus pointer to genid of raw IP route,
114 pmtu disc will update pmtu on raw IP route and increase its genid.
115 dst_check() will see this for top level and trigger resyncing
116 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
119 struct xfrm_state_walk {
120 struct list_head all;
125 struct xfrm_address_filter *filter;
128 struct xfrm_state_offload {
129 struct net_device *dev;
130 unsigned long offload_handle;
131 unsigned int num_exthdrs;
135 /* Full description of state of transformer. */
137 possible_net_t xs_net;
139 struct hlist_node gclist;
140 struct hlist_node bydst;
142 struct hlist_node bysrc;
143 struct hlist_node byspi;
149 struct xfrm_selector sel;
150 struct xfrm_mark mark;
156 /* Key manager bits */
157 struct xfrm_state_walk km;
159 /* Parameters of this state. */
164 u8 aalgo, ealgo, calgo;
167 xfrm_address_t saddr;
171 struct xfrm_mark smark;
174 struct xfrm_lifetime_cfg lft;
176 /* Data for transformer */
177 struct xfrm_algo_auth *aalg;
178 struct xfrm_algo *ealg;
179 struct xfrm_algo *calg;
180 struct xfrm_algo_aead *aead;
183 /* Data for encapsulator */
184 struct xfrm_encap_tmpl *encap;
186 /* Data for care-of address */
187 xfrm_address_t *coaddr;
189 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
190 struct xfrm_state *tunnel;
192 /* If a tunnel, number of users + 1 */
193 atomic_t tunnel_users;
195 /* State for replay detection */
196 struct xfrm_replay_state replay;
197 struct xfrm_replay_state_esn *replay_esn;
199 /* Replay detection state at the time we sent the last notification */
200 struct xfrm_replay_state preplay;
201 struct xfrm_replay_state_esn *preplay_esn;
203 /* The functions for replay detection. */
204 const struct xfrm_replay *repl;
206 /* internal flag that only holds state for delayed aevent at the
211 /* Replay detection notification settings */
215 /* Replay detection notification timer */
216 struct timer_list rtimer;
219 struct xfrm_stats stats;
221 struct xfrm_lifetime_cur curlft;
222 struct tasklet_hrtimer mtimer;
224 struct xfrm_state_offload xso;
226 /* used to fix curlft->add_time when changing date */
232 struct page_frag xfrag;
234 /* Reference to data common to all the instances of this
236 const struct xfrm_type *type;
237 struct xfrm_mode *inner_mode;
238 struct xfrm_mode *inner_mode_iaf;
239 struct xfrm_mode *outer_mode;
241 const struct xfrm_type_offload *type_offload;
243 /* Security context */
244 struct xfrm_sec_ctx *security;
246 /* Private data of this transformer, format is opaque,
247 * interpreted by xfrm_type methods. */
251 static inline struct net *xs_net(struct xfrm_state *x)
253 return read_pnet(&x->xs_net);
256 /* xflags - make enum if more show up */
257 #define XFRM_TIME_DEFER 1
258 #define XFRM_SOFT_EXPIRE 2
269 /* callback structure passed from either netlink or pfkey */
286 void (*advance)(struct xfrm_state *x, __be32 net_seq);
287 int (*check)(struct xfrm_state *x,
290 int (*recheck)(struct xfrm_state *x,
293 void (*notify)(struct xfrm_state *x, int event);
294 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
298 struct xfrm_if *(*decode_session)(struct sk_buff *skb);
301 void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb);
302 void xfrm_if_unregister_cb(void);
307 struct xfrm_policy_afinfo {
308 struct dst_ops *dst_ops;
309 struct dst_entry *(*dst_lookup)(struct net *net,
311 const xfrm_address_t *saddr,
312 const xfrm_address_t *daddr,
314 int (*get_saddr)(struct net *net, int oif,
315 xfrm_address_t *saddr,
316 xfrm_address_t *daddr,
318 void (*decode_session)(struct sk_buff *skb,
321 int (*get_tos)(const struct flowi *fl);
322 int (*init_path)(struct xfrm_dst *path,
323 struct dst_entry *dst,
325 int (*fill_dst)(struct xfrm_dst *xdst,
326 struct net_device *dev,
327 const struct flowi *fl);
328 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
331 int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family);
332 void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo);
333 void km_policy_notify(struct xfrm_policy *xp, int dir,
334 const struct km_event *c);
335 void km_state_notify(struct xfrm_state *x, const struct km_event *c);
338 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
339 struct xfrm_policy *pol);
340 void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
341 int __xfrm_state_delete(struct xfrm_state *x);
343 struct xfrm_state_afinfo {
347 struct module *owner;
348 const struct xfrm_type *type_map[IPPROTO_MAX];
349 const struct xfrm_type_offload *type_offload_map[IPPROTO_MAX];
350 struct xfrm_mode *mode_map[XFRM_MODE_MAX];
352 int (*init_flags)(struct xfrm_state *x);
353 void (*init_tempsel)(struct xfrm_selector *sel,
354 const struct flowi *fl);
355 void (*init_temprop)(struct xfrm_state *x,
356 const struct xfrm_tmpl *tmpl,
357 const xfrm_address_t *daddr,
358 const xfrm_address_t *saddr);
359 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
360 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
361 int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
362 int (*output_finish)(struct sock *sk, struct sk_buff *skb);
363 int (*extract_input)(struct xfrm_state *x,
364 struct sk_buff *skb);
365 int (*extract_output)(struct xfrm_state *x,
366 struct sk_buff *skb);
367 int (*transport_finish)(struct sk_buff *skb,
369 void (*local_error)(struct sk_buff *skb, u32 mtu);
372 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
373 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
374 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
375 struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family);
377 struct xfrm_input_afinfo {
379 int (*callback)(struct sk_buff *skb, u8 protocol,
383 int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo);
384 int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo);
386 void xfrm_flush_gc(void);
387 void xfrm_state_delete_tunnel(struct xfrm_state *x);
391 struct module *owner;
394 #define XFRM_TYPE_NON_FRAGMENT 1
395 #define XFRM_TYPE_REPLAY_PROT 2
396 #define XFRM_TYPE_LOCAL_COADDR 4
397 #define XFRM_TYPE_REMOTE_COADDR 8
399 int (*init_state)(struct xfrm_state *x);
400 void (*destructor)(struct xfrm_state *);
401 int (*input)(struct xfrm_state *, struct sk_buff *skb);
402 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
403 int (*reject)(struct xfrm_state *, struct sk_buff *,
404 const struct flowi *);
405 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
406 /* Estimate maximal size of result of transformation of a dgram */
407 u32 (*get_mtu)(struct xfrm_state *, int size);
410 int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
411 int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
413 struct xfrm_type_offload {
415 struct module *owner;
417 void (*encap)(struct xfrm_state *, struct sk_buff *pskb);
418 int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb);
419 int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features);
422 int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family);
423 int xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family);
426 struct xfrm_state_afinfo *afinfo;
427 struct module *owner;
433 /* Flags for xfrm_mode. */
435 XFRM_MODE_FLAG_TUNNEL = 1,
438 int xfrm_register_mode(struct xfrm_mode *mode);
439 void xfrm_unregister_mode(struct xfrm_mode *mode);
441 static inline int xfrm_af2proto(unsigned int family)
453 static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
455 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
456 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
457 return x->inner_mode;
459 return x->inner_mode_iaf;
463 /* id in template is interpreted as:
464 * daddr - destination of tunnel, may be zero for transport mode.
465 * spi - zero to acquire spi. Not zero if spi is static, then
466 * daddr must be fixed too.
467 * proto - AH/ESP/IPCOMP
471 /* Source address of tunnel. Ignored, if it is not a tunnel. */
472 xfrm_address_t saddr;
474 unsigned short encap_family;
478 /* Mode: transport, tunnel etc. */
481 /* Sharing mode: unique, this session only, this user only etc. */
484 /* May skip this transfomration if no SA is found */
487 /* Skip aalgos/ealgos/calgos checks. */
490 /* Bit mask of algos allowed for acquisition */
496 #define XFRM_MAX_DEPTH 6
497 #define XFRM_MAX_OFFLOAD_DEPTH 1
499 struct xfrm_policy_walk_entry {
500 struct list_head all;
504 struct xfrm_policy_walk {
505 struct xfrm_policy_walk_entry walk;
510 struct xfrm_policy_queue {
511 struct sk_buff_head hold_queue;
512 struct timer_list hold_timer;
513 unsigned long timeout;
517 possible_net_t xp_net;
518 struct hlist_node bydst;
519 struct hlist_node byidx;
521 /* This lock only affects elements except for entry. */
525 struct timer_list timer;
531 struct xfrm_mark mark;
532 struct xfrm_selector selector;
533 struct xfrm_lifetime_cfg lft;
534 struct xfrm_lifetime_cur curlft;
535 struct xfrm_policy_walk_entry walk;
536 struct xfrm_policy_queue polq;
543 struct xfrm_sec_ctx *security;
544 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
545 struct hlist_node bydst_inexact_list;
549 static inline struct net *xp_net(const struct xfrm_policy *xp)
551 return read_pnet(&xp->xp_net);
554 struct xfrm_kmaddress {
555 xfrm_address_t local;
556 xfrm_address_t remote;
561 struct xfrm_migrate {
562 xfrm_address_t old_daddr;
563 xfrm_address_t old_saddr;
564 xfrm_address_t new_daddr;
565 xfrm_address_t new_saddr;
574 #define XFRM_KM_TIMEOUT 30
576 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
577 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
579 /* default aevent timeout in units of 100ms */
580 #define XFRM_AE_ETIME 10
581 /* Async Event timer multiplier */
582 #define XFRM_AE_ETH_M 10
583 /* default seq threshold size */
584 #define XFRM_AE_SEQT_SIZE 2
587 struct list_head list;
588 int (*notify)(struct xfrm_state *x, const struct km_event *c);
589 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
590 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
591 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
592 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
593 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
594 int (*migrate)(const struct xfrm_selector *sel,
596 const struct xfrm_migrate *m,
598 const struct xfrm_kmaddress *k,
599 const struct xfrm_encap_tmpl *encap);
600 bool (*is_alive)(const struct km_event *c);
603 int xfrm_register_km(struct xfrm_mgr *km);
604 int xfrm_unregister_km(struct xfrm_mgr *km);
606 struct xfrm_tunnel_skb_cb {
608 struct inet_skb_parm h4;
609 struct inet6_skb_parm h6;
613 struct ip_tunnel *ip4;
618 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
621 * This structure is used for the duration where packets are being
622 * transformed by IPsec. As soon as the packet leaves IPsec the
623 * area beyond the generic IP part may be overwritten.
626 struct xfrm_tunnel_skb_cb header;
628 /* Sequence number for replay protection. */
641 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
644 * This structure is used by the afinfo prepare_input/prepare_output functions
645 * to transmit header information to the mode input/output functions.
647 struct xfrm_mode_skb_cb {
648 struct xfrm_tunnel_skb_cb header;
650 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
654 /* IP header length (excluding options or extension headers). */
657 /* TOS for IPv4, class for IPv6. */
660 /* TTL for IPv4, hop limitfor IPv6. */
663 /* Protocol for IPv4, NH for IPv6. */
666 /* Option length for IPv4, zero for IPv6. */
669 /* Used by IPv6 only, zero for IPv4. */
673 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
676 * This structure is used by the input processing to locate the SPI and
677 * related information.
679 struct xfrm_spi_skb_cb {
680 struct xfrm_tunnel_skb_cb header;
682 unsigned int daddroff;
687 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
689 #ifdef CONFIG_AUDITSYSCALL
690 static inline struct audit_buffer *xfrm_audit_start(const char *op)
692 struct audit_buffer *audit_buf = NULL;
694 if (audit_enabled == AUDIT_OFF)
696 audit_buf = audit_log_start(audit_context(), GFP_ATOMIC,
697 AUDIT_MAC_IPSEC_EVENT);
698 if (audit_buf == NULL)
700 audit_log_format(audit_buf, "op=%s", op);
704 static inline void xfrm_audit_helper_usrinfo(bool task_valid,
705 struct audit_buffer *audit_buf)
707 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
708 audit_get_loginuid(current) :
710 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
713 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
714 audit_log_task_context(audit_buf);
717 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
718 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
720 void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
721 void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
722 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
723 struct sk_buff *skb);
724 void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
726 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
727 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
729 void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
733 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
738 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
743 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
748 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
753 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
758 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
759 struct sk_buff *skb, __be32 net_seq)
763 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
768 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
769 __be32 net_spi, __be32 net_seq)
773 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
774 struct sk_buff *skb, u8 proto)
777 #endif /* CONFIG_AUDITSYSCALL */
779 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
781 if (likely(policy != NULL))
782 refcount_inc(&policy->refcnt);
785 void xfrm_policy_destroy(struct xfrm_policy *policy);
787 static inline void xfrm_pol_put(struct xfrm_policy *policy)
789 if (refcount_dec_and_test(&policy->refcnt))
790 xfrm_policy_destroy(policy);
793 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
796 for (i = npols - 1; i >= 0; --i)
797 xfrm_pol_put(pols[i]);
800 void __xfrm_state_destroy(struct xfrm_state *, bool);
802 static inline void __xfrm_state_put(struct xfrm_state *x)
804 refcount_dec(&x->refcnt);
807 static inline void xfrm_state_put(struct xfrm_state *x)
809 if (refcount_dec_and_test(&x->refcnt))
810 __xfrm_state_destroy(x, false);
813 static inline void xfrm_state_put_sync(struct xfrm_state *x)
815 if (refcount_dec_and_test(&x->refcnt))
816 __xfrm_state_destroy(x, true);
819 static inline void xfrm_state_hold(struct xfrm_state *x)
821 refcount_inc(&x->refcnt);
824 static inline bool addr_match(const void *token1, const void *token2,
825 unsigned int prefixlen)
827 const __be32 *a1 = token1;
828 const __be32 *a2 = token2;
832 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
833 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
836 if (memcmp(a1, a2, pdw << 2))
842 mask = htonl((0xffffffff) << (32 - pbi));
844 if ((a1[pdw] ^ a2[pdw]) & mask)
851 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
853 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
854 if (sizeof(long) == 4 && prefixlen == 0)
856 return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen)));
860 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
863 switch(fl->flowi_proto) {
866 case IPPROTO_UDPLITE:
868 port = uli->ports.sport;
872 port = htons(uli->icmpt.type);
875 port = htons(uli->mht.type);
878 port = htons(ntohl(uli->gre_key) >> 16);
887 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
890 switch(fl->flowi_proto) {
893 case IPPROTO_UDPLITE:
895 port = uli->ports.dport;
899 port = htons(uli->icmpt.code);
902 port = htons(ntohl(uli->gre_key) & 0xffff);
910 bool xfrm_selector_match(const struct xfrm_selector *sel,
911 const struct flowi *fl, unsigned short family);
913 #ifdef CONFIG_SECURITY_NETWORK_XFRM
914 /* If neither has a context --> match
915 * Otherwise, both must have a context and the sids, doi, alg must match
917 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
919 return ((!s1 && !s2) ||
921 (s1->ctx_sid == s2->ctx_sid) &&
922 (s1->ctx_doi == s2->ctx_doi) &&
923 (s1->ctx_alg == s2->ctx_alg)));
926 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
932 /* A struct encoding bundle of transformations to apply to some set of flow.
934 * xdst->child points to the next element of bundle.
935 * dst->xfrm points to an instanse of transformer.
937 * Due to unfortunate limitations of current routing cache, which we
938 * have no time to fix, it mirrors struct rtable and bound to the same
939 * routing key, including saddr,daddr. However, we can have many of
940 * bundles differing by session id. All the bundles grow from a parent
945 struct dst_entry dst;
949 struct dst_entry *route;
950 struct dst_entry *child;
951 struct dst_entry *path;
952 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
953 int num_pols, num_xfrms;
956 u32 route_mtu_cached;
957 u32 child_mtu_cached;
962 static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst)
966 const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst;
971 return (struct dst_entry *) dst;
974 static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst)
978 struct xfrm_dst *xdst = (struct xfrm_dst *) dst;
986 static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child)
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_if_parms {
1003 char name[IFNAMSIZ]; /* name of XFRM device */
1004 int link; /* ifindex of underlying L2 interface */
1005 u32 if_id; /* interface identifyer */
1009 struct xfrm_if __rcu *next; /* next interface in list */
1010 struct net_device *dev; /* virtual device associated with interface */
1011 struct net_device *phydev; /* physical device */
1012 struct net *net; /* netns for packet i/o */
1013 struct xfrm_if_parms p; /* interface parms */
1015 struct gro_cells gro_cells;
1018 struct xfrm_offload {
1019 /* Output sequence number for replay protection on offloading. */
1026 #define SA_DELETE_REQ 1
1027 #define CRYPTO_DONE 2
1028 #define CRYPTO_NEXT_DONE 4
1029 #define CRYPTO_FALLBACK 8
1030 #define XFRM_GSO_SEGMENT 16
1032 #define XFRM_ESP_NO_TRAILER 64
1033 #define XFRM_DEV_RESUME 128
1036 #define CRYPTO_SUCCESS 1
1037 #define CRYPTO_GENERIC_ERROR 2
1038 #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
1039 #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
1040 #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
1041 #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
1042 #define CRYPTO_INVALID_PACKET_SYNTAX 64
1043 #define CRYPTO_INVALID_PROTOCOL 128
1052 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1053 struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
1056 struct sec_path *secpath_set(struct sk_buff *skb);
1059 secpath_reset(struct sk_buff *skb)
1062 skb_ext_del(skb, SKB_EXT_SEC_PATH);
1067 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1071 return addr->a4 == 0;
1073 return ipv6_addr_any(&addr->in6);
1079 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1081 return (tmpl->saddr.a4 &&
1082 tmpl->saddr.a4 != x->props.saddr.a4);
1086 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1088 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1089 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1093 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1097 return __xfrm4_state_addr_cmp(tmpl, x);
1099 return __xfrm6_state_addr_cmp(tmpl, x);
1105 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1106 unsigned short family);
1108 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1109 struct sk_buff *skb,
1110 unsigned int family, int reverse)
1112 struct net *net = dev_net(skb->dev);
1113 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1115 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1116 return __xfrm_policy_check(sk, ndir, skb, family);
1118 return (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) ||
1119 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1120 __xfrm_policy_check(sk, ndir, skb, family);
1123 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1125 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1128 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1130 return xfrm_policy_check(sk, dir, skb, AF_INET);
1133 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1135 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1138 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1139 struct sk_buff *skb)
1141 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1144 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1145 struct sk_buff *skb)
1147 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1150 int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1151 unsigned int family, int reverse);
1153 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1154 unsigned int family)
1156 return __xfrm_decode_session(skb, fl, family, 0);
1159 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1161 unsigned int family)
1163 return __xfrm_decode_session(skb, fl, family, 1);
1166 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1168 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1170 struct net *net = dev_net(skb->dev);
1172 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1173 (skb_dst(skb)->flags & DST_NOXFRM) ||
1174 __xfrm_route_forward(skb, family);
1177 static inline int xfrm4_route_forward(struct sk_buff *skb)
1179 return xfrm_route_forward(skb, AF_INET);
1182 static inline int xfrm6_route_forward(struct sk_buff *skb)
1184 return xfrm_route_forward(skb, AF_INET6);
1187 int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1189 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1191 sk->sk_policy[0] = NULL;
1192 sk->sk_policy[1] = NULL;
1193 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1194 return __xfrm_sk_clone_policy(sk, osk);
1198 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1200 static inline void xfrm_sk_free_policy(struct sock *sk)
1202 struct xfrm_policy *pol;
1204 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1205 if (unlikely(pol != NULL)) {
1206 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1207 sk->sk_policy[0] = NULL;
1209 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1210 if (unlikely(pol != NULL)) {
1211 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1212 sk->sk_policy[1] = NULL;
1218 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1219 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1220 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1221 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1222 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1226 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1230 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1234 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1236 unsigned int family)
1240 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1241 struct sk_buff *skb)
1245 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1246 struct sk_buff *skb)
1253 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1257 return (xfrm_address_t *)&fl->u.ip4.daddr;
1259 return (xfrm_address_t *)&fl->u.ip6.daddr;
1265 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1269 return (xfrm_address_t *)&fl->u.ip4.saddr;
1271 return (xfrm_address_t *)&fl->u.ip6.saddr;
1277 void xfrm_flowi_addr_get(const struct flowi *fl,
1278 xfrm_address_t *saddr, xfrm_address_t *daddr,
1279 unsigned short family)
1283 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1284 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1287 saddr->in6 = fl->u.ip6.saddr;
1288 daddr->in6 = fl->u.ip6.daddr;
1293 static __inline__ int
1294 __xfrm4_state_addr_check(const struct xfrm_state *x,
1295 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1297 if (daddr->a4 == x->id.daddr.a4 &&
1298 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1303 static __inline__ int
1304 __xfrm6_state_addr_check(const struct xfrm_state *x,
1305 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1307 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1308 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1309 ipv6_addr_any((struct in6_addr *)saddr) ||
1310 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1315 static __inline__ int
1316 xfrm_state_addr_check(const struct xfrm_state *x,
1317 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1318 unsigned short family)
1322 return __xfrm4_state_addr_check(x, daddr, saddr);
1324 return __xfrm6_state_addr_check(x, daddr, saddr);
1329 static __inline__ int
1330 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1331 unsigned short family)
1335 return __xfrm4_state_addr_check(x,
1336 (const xfrm_address_t *)&fl->u.ip4.daddr,
1337 (const xfrm_address_t *)&fl->u.ip4.saddr);
1339 return __xfrm6_state_addr_check(x,
1340 (const xfrm_address_t *)&fl->u.ip6.daddr,
1341 (const xfrm_address_t *)&fl->u.ip6.saddr);
1346 static inline int xfrm_state_kern(const struct xfrm_state *x)
1348 return atomic_read(&x->tunnel_users);
1351 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1353 return (!userproto || proto == userproto ||
1354 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1355 proto == IPPROTO_ESP ||
1356 proto == IPPROTO_COMP)));
1360 * xfrm algorithm information
1362 struct xfrm_algo_aead_info {
1367 struct xfrm_algo_auth_info {
1372 struct xfrm_algo_encr_info {
1378 struct xfrm_algo_comp_info {
1382 struct xfrm_algo_desc {
1386 u8 pfkey_supported:1;
1388 struct xfrm_algo_aead_info aead;
1389 struct xfrm_algo_auth_info auth;
1390 struct xfrm_algo_encr_info encr;
1391 struct xfrm_algo_comp_info comp;
1393 struct sadb_alg desc;
1396 /* XFRM protocol handlers. */
1397 struct xfrm4_protocol {
1398 int (*handler)(struct sk_buff *skb);
1399 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1401 int (*cb_handler)(struct sk_buff *skb, int err);
1402 int (*err_handler)(struct sk_buff *skb, u32 info);
1404 struct xfrm4_protocol __rcu *next;
1408 struct xfrm6_protocol {
1409 int (*handler)(struct sk_buff *skb);
1410 int (*cb_handler)(struct sk_buff *skb, int err);
1411 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1412 u8 type, u8 code, int offset, __be32 info);
1414 struct xfrm6_protocol __rcu *next;
1418 /* XFRM tunnel handlers. */
1419 struct xfrm_tunnel {
1420 int (*handler)(struct sk_buff *skb);
1421 int (*err_handler)(struct sk_buff *skb, u32 info);
1423 struct xfrm_tunnel __rcu *next;
1427 struct xfrm6_tunnel {
1428 int (*handler)(struct sk_buff *skb);
1429 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1430 u8 type, u8 code, int offset, __be32 info);
1431 struct xfrm6_tunnel __rcu *next;
1435 void xfrm_init(void);
1436 void xfrm4_init(void);
1437 int xfrm_state_init(struct net *net);
1438 void xfrm_state_fini(struct net *net);
1439 void xfrm4_state_init(void);
1440 void xfrm4_protocol_init(void);
1442 int xfrm6_init(void);
1443 void xfrm6_fini(void);
1444 int xfrm6_state_init(void);
1445 void xfrm6_state_fini(void);
1446 int xfrm6_protocol_init(void);
1447 void xfrm6_protocol_fini(void);
1449 static inline int xfrm6_init(void)
1453 static inline void xfrm6_fini(void)
1459 #ifdef CONFIG_XFRM_STATISTICS
1460 int xfrm_proc_init(struct net *net);
1461 void xfrm_proc_fini(struct net *net);
1464 int xfrm_sysctl_init(struct net *net);
1465 #ifdef CONFIG_SYSCTL
1466 void xfrm_sysctl_fini(struct net *net);
1468 static inline void xfrm_sysctl_fini(struct net *net)
1473 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1474 struct xfrm_address_filter *filter);
1475 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1476 int (*func)(struct xfrm_state *, int, void*), void *);
1477 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1478 struct xfrm_state *xfrm_state_alloc(struct net *net);
1479 void xfrm_state_free(struct xfrm_state *x);
1480 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1481 const xfrm_address_t *saddr,
1482 const struct flowi *fl,
1483 struct xfrm_tmpl *tmpl,
1484 struct xfrm_policy *pol, int *err,
1485 unsigned short family, u32 if_id);
1486 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
1487 xfrm_address_t *daddr,
1488 xfrm_address_t *saddr,
1489 unsigned short family,
1490 u8 mode, u8 proto, u32 reqid);
1491 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1492 unsigned short family);
1493 int xfrm_state_check_expire(struct xfrm_state *x);
1494 void xfrm_state_insert(struct xfrm_state *x);
1495 int xfrm_state_add(struct xfrm_state *x);
1496 int xfrm_state_update(struct xfrm_state *x);
1497 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1498 const xfrm_address_t *daddr, __be32 spi,
1499 u8 proto, unsigned short family);
1500 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1501 const xfrm_address_t *daddr,
1502 const xfrm_address_t *saddr,
1504 unsigned short family);
1505 #ifdef CONFIG_XFRM_SUB_POLICY
1506 int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1507 unsigned short family, struct net *net);
1508 int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1509 unsigned short family);
1511 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1512 int n, unsigned short family, struct net *net)
1517 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1518 int n, unsigned short family)
1524 struct xfrmk_sadinfo {
1525 u32 sadhcnt; /* current hash bkts */
1526 u32 sadhmcnt; /* max allowed hash bkts */
1527 u32 sadcnt; /* current running count */
1530 struct xfrmk_spdinfo {
1541 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1542 int xfrm_state_delete(struct xfrm_state *x);
1543 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync);
1544 int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
1545 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1546 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1547 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1548 int xfrm_init_replay(struct xfrm_state *x);
1549 int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1550 int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload);
1551 int xfrm_init_state(struct xfrm_state *x);
1552 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1553 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1554 int xfrm_trans_queue(struct sk_buff *skb,
1555 int (*finish)(struct net *, struct sock *,
1557 int xfrm_output_resume(struct sk_buff *skb, int err);
1558 int xfrm_output(struct sock *sk, struct sk_buff *skb);
1560 #if IS_ENABLED(CONFIG_NET_PKTGEN)
1561 int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb);
1564 void xfrm_local_error(struct sk_buff *skb, int mtu);
1565 int xfrm4_extract_header(struct sk_buff *skb);
1566 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1567 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1569 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1570 int xfrm4_rcv(struct sk_buff *skb);
1571 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1573 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1575 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1576 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1577 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1578 return xfrm_input(skb, nexthdr, spi, 0);
1581 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1582 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1583 int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1584 int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1585 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1586 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1587 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1588 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1589 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1590 int xfrm6_extract_header(struct sk_buff *skb);
1591 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1592 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1594 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1595 int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1596 int xfrm6_rcv(struct sk_buff *skb);
1597 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1598 xfrm_address_t *saddr, u8 proto);
1599 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1600 int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1601 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1602 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1603 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1604 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1605 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1606 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1607 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1608 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1609 int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1610 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1614 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1615 int xfrm_user_policy(struct sock *sk, int optname,
1616 u8 __user *optval, int optlen);
1618 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1620 return -ENOPROTOOPT;
1623 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1625 /* should not happen */
1631 struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
1632 const xfrm_address_t *saddr,
1633 const xfrm_address_t *daddr,
1634 int family, u32 mark);
1636 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1638 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1639 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1640 int (*func)(struct xfrm_policy *, int, int, void*),
1642 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1643 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1644 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, u32 if_id,
1646 struct xfrm_selector *sel,
1647 struct xfrm_sec_ctx *ctx, int delete,
1649 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u32 if_id, u8,
1650 int dir, u32 id, int delete, int *err);
1651 int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1652 void xfrm_policy_hash_rebuild(struct net *net);
1653 u32 xfrm_get_acqseq(void);
1654 int verify_spi_info(u8 proto, u32 min, u32 max);
1655 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1656 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1657 u8 mode, u32 reqid, u32 if_id, u8 proto,
1658 const xfrm_address_t *daddr,
1659 const xfrm_address_t *saddr, int create,
1660 unsigned short family);
1661 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1663 #ifdef CONFIG_XFRM_MIGRATE
1664 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1665 const struct xfrm_migrate *m, int num_bundles,
1666 const struct xfrm_kmaddress *k,
1667 const struct xfrm_encap_tmpl *encap);
1668 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1669 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1670 struct xfrm_migrate *m,
1671 struct xfrm_encap_tmpl *encap);
1672 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1673 struct xfrm_migrate *m, int num_bundles,
1674 struct xfrm_kmaddress *k, struct net *net,
1675 struct xfrm_encap_tmpl *encap);
1678 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1679 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1680 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1681 xfrm_address_t *addr);
1683 void xfrm_input_init(void);
1684 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1686 void xfrm_probe_algs(void);
1687 int xfrm_count_pfkey_auth_supported(void);
1688 int xfrm_count_pfkey_enc_supported(void);
1689 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1690 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1691 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1692 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1693 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1694 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1695 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1696 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1697 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1700 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1701 const xfrm_address_t *b)
1703 return ipv6_addr_equal((const struct in6_addr *)a,
1704 (const struct in6_addr *)b);
1707 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1708 const xfrm_address_t *b,
1714 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1716 return xfrm6_addr_equal(a, b);
1720 static inline int xfrm_policy_id2dir(u32 index)
1726 static inline int xfrm_aevent_is_on(struct net *net)
1732 nlsk = rcu_dereference(net->xfrm.nlsk);
1734 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1739 static inline int xfrm_acquire_is_on(struct net *net)
1745 nlsk = rcu_dereference(net->xfrm.nlsk);
1747 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1754 static inline unsigned int aead_len(struct xfrm_algo_aead *alg)
1756 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1759 static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
1761 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1764 static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1766 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1769 static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1771 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1774 #ifdef CONFIG_XFRM_MIGRATE
1775 static inline int xfrm_replay_clone(struct xfrm_state *x,
1776 struct xfrm_state *orig)
1778 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1783 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1784 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1786 x->preplay_esn = kmemdup(x->replay_esn,
1787 xfrm_replay_state_esn_len(x->replay_esn),
1789 if (!x->preplay_esn) {
1790 kfree(x->replay_esn);
1797 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1799 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1803 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1805 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1808 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1810 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1813 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1816 for (i = 0; i < n; i++)
1817 xfrm_state_put(*(states + i));
1820 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1823 for (i = 0; i < n; i++)
1824 xfrm_state_delete(*(states + i));
1829 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1831 struct sec_path *sp = skb_sec_path(skb);
1833 return sp->xvec[sp->len - 1];
1837 static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1840 struct sec_path *sp = skb_sec_path(skb);
1842 if (!sp || !sp->olen || sp->len != sp->olen)
1845 return &sp->ovec[sp->olen - 1];
1851 void __init xfrm_dev_init(void);
1853 #ifdef CONFIG_XFRM_OFFLOAD
1854 void xfrm_dev_resume(struct sk_buff *skb);
1855 void xfrm_dev_backlog(struct softnet_data *sd);
1856 struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again);
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_advance_esn(struct xfrm_state *x)
1863 struct xfrm_state_offload *xso = &x->xso;
1865 if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn)
1866 xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x);
1869 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1871 struct xfrm_state *x = dst->xfrm;
1872 struct xfrm_dst *xdst;
1874 if (!x || !x->type_offload)
1877 xdst = (struct xfrm_dst *) dst;
1878 if (!x->xso.offload_handle && !xdst->child->xfrm)
1880 if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) &&
1887 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1889 struct xfrm_state_offload *xso = &x->xso;
1892 xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
1895 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1897 struct xfrm_state_offload *xso = &x->xso;
1898 struct net_device *dev = xso->dev;
1900 if (dev && dev->xfrmdev_ops) {
1901 if (dev->xfrmdev_ops->xdo_dev_state_free)
1902 dev->xfrmdev_ops->xdo_dev_state_free(x);
1908 static inline void xfrm_dev_resume(struct sk_buff *skb)
1912 static inline void xfrm_dev_backlog(struct softnet_data *sd)
1916 static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again)
1921 static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
1926 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1930 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1934 static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
1939 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1943 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1949 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1951 if (attrs[XFRMA_MARK])
1952 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1959 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1964 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1968 static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x)
1970 struct xfrm_mark *m = &x->props.smark;
1972 return (m->v & m->m) | (mark & ~m->m);
1975 static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id)
1980 ret = nla_put_u32(skb, XFRMA_IF_ID, if_id);
1984 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1985 unsigned int family)
1987 bool tunnel = false;
1991 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
1995 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
1999 if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL))
2004 #endif /* _NET_XFRM_H */