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>
18 #include <linux/sockptr.h>
23 #include <net/route.h>
25 #include <net/ip6_fib.h>
27 #include <net/gro_cells.h>
29 #include <linux/interrupt.h>
31 #ifdef CONFIG_XFRM_STATISTICS
35 #define XFRM_PROTO_ESP 50
36 #define XFRM_PROTO_AH 51
37 #define XFRM_PROTO_COMP 108
38 #define XFRM_PROTO_IPIP 4
39 #define XFRM_PROTO_IPV6 41
40 #define XFRM_PROTO_ROUTING IPPROTO_ROUTING
41 #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
43 #define XFRM_ALIGN4(len) (((len) + 3) & ~3)
44 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
45 #define MODULE_ALIAS_XFRM_MODE(family, encap) \
46 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
47 #define MODULE_ALIAS_XFRM_TYPE(family, proto) \
48 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
49 #define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \
50 MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto))
52 #ifdef CONFIG_XFRM_STATISTICS
53 #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
54 #define XFRM_ADD_STATS(net, field, val) SNMP_ADD_STATS((net)->mib.xfrm_statistics, field, val)
56 #define XFRM_INC_STATS(net, field) ((void)(net))
57 #define XFRM_ADD_STATS(net, field, val) ((void)(net))
61 /* Organization of SPD aka "XFRM rules"
62 ------------------------------------
65 - policy rule, struct xfrm_policy (=SPD entry)
66 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
67 - instance of a transformer, struct xfrm_state (=SA)
68 - template to clone xfrm_state, struct xfrm_tmpl
70 SPD is plain linear list of xfrm_policy rules, ordered by priority.
71 (To be compatible with existing pfkeyv2 implementations,
72 many rules with priority of 0x7fffffff are allowed to exist and
73 such rules are ordered in an unpredictable way, thanks to bsd folks.)
75 Lookup is plain linear search until the first match with selector.
77 If "action" is "block", then we prohibit the flow, otherwise:
78 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
79 policy entry has list of up to XFRM_MAX_DEPTH transformations,
80 described by templates xfrm_tmpl. Each template is resolved
81 to a complete xfrm_state (see below) and we pack bundle of transformations
82 to a dst_entry returned to requestor.
84 dst -. xfrm .-> xfrm_state #1
85 |---. child .-> dst -. xfrm .-> xfrm_state #2
86 |---. child .-> dst -. xfrm .-> xfrm_state #3
89 Bundles are cached at xrfm_policy struct (field ->bundles).
92 Resolution of xrfm_tmpl
93 -----------------------
95 1. ->mode Mode: transport or tunnel
96 2. ->id.proto Protocol: AH/ESP/IPCOMP
97 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
98 Q: allow to resolve security gateway?
99 4. ->id.spi If not zero, static SPI.
100 5. ->saddr Local tunnel endpoint, ignored for transport mode.
101 6. ->algos List of allowed algos. Plain bitmask now.
102 Q: ealgos, aalgos, calgos. What a mess...
103 7. ->share Sharing mode.
104 Q: how to implement private sharing mode? To add struct sock* to
107 Having this template we search through SAD searching for entries
108 with appropriate mode/proto/algo, permitted by selector.
109 If no appropriate entry found, it is requested from key manager.
112 Q: How to find all the bundles referring to a physical path for
113 PMTU discovery? Seems, dst should contain list of all parents...
114 and enter to infinite locking hierarchy disaster.
115 No! It is easier, we will not search for them, let them find us.
116 We add genid to each dst plus pointer to genid of raw IP route,
117 pmtu disc will update pmtu on raw IP route and increase its genid.
118 dst_check() will see this for top level and trigger resyncing
119 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
122 struct xfrm_state_walk {
123 struct list_head all;
128 struct xfrm_address_filter *filter;
132 XFRM_DEV_OFFLOAD_IN = 1,
133 XFRM_DEV_OFFLOAD_OUT,
134 XFRM_DEV_OFFLOAD_FWD,
138 XFRM_DEV_OFFLOAD_UNSPECIFIED,
139 XFRM_DEV_OFFLOAD_CRYPTO,
140 XFRM_DEV_OFFLOAD_PACKET,
144 XFRM_DEV_OFFLOAD_FLAG_ACQ = 1,
147 struct xfrm_dev_offload {
148 struct net_device *dev;
149 netdevice_tracker dev_tracker;
150 struct net_device *real_dev;
151 unsigned long offload_handle;
163 /* Flags for xfrm_mode. */
165 XFRM_MODE_FLAG_TUNNEL = 1,
168 enum xfrm_replay_mode {
169 XFRM_REPLAY_MODE_LEGACY,
170 XFRM_REPLAY_MODE_BMP,
171 XFRM_REPLAY_MODE_ESN,
174 /* Full description of state of transformer. */
176 possible_net_t xs_net;
178 struct hlist_node gclist;
179 struct hlist_node bydst;
181 struct hlist_node bysrc;
182 struct hlist_node byspi;
183 struct hlist_node byseq;
189 struct xfrm_selector sel;
190 struct xfrm_mark mark;
196 /* Key manager bits */
197 struct xfrm_state_walk km;
199 /* Parameters of this state. */
204 u8 aalgo, ealgo, calgo;
207 xfrm_address_t saddr;
211 struct xfrm_mark smark;
214 struct xfrm_lifetime_cfg lft;
216 /* Data for transformer */
217 struct xfrm_algo_auth *aalg;
218 struct xfrm_algo *ealg;
219 struct xfrm_algo *calg;
220 struct xfrm_algo_aead *aead;
223 /* mapping change rate limiting */
224 __be16 new_mapping_sport;
225 u32 new_mapping; /* seconds */
226 u32 mapping_maxage; /* seconds for input SA */
228 /* Data for encapsulator */
229 struct xfrm_encap_tmpl *encap;
230 struct sock __rcu *encap_sk;
232 /* Data for care-of address */
233 xfrm_address_t *coaddr;
235 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
236 struct xfrm_state *tunnel;
238 /* If a tunnel, number of users + 1 */
239 atomic_t tunnel_users;
241 /* State for replay detection */
242 struct xfrm_replay_state replay;
243 struct xfrm_replay_state_esn *replay_esn;
245 /* Replay detection state at the time we sent the last notification */
246 struct xfrm_replay_state preplay;
247 struct xfrm_replay_state_esn *preplay_esn;
249 /* replay detection mode */
250 enum xfrm_replay_mode repl_mode;
251 /* internal flag that only holds state for delayed aevent at the
256 /* Replay detection notification settings */
260 /* Replay detection notification timer */
261 struct timer_list rtimer;
264 struct xfrm_stats stats;
266 struct xfrm_lifetime_cur curlft;
267 struct hrtimer mtimer;
269 struct xfrm_dev_offload xso;
271 /* used to fix curlft->add_time when changing date */
277 struct page_frag xfrag;
279 /* Reference to data common to all the instances of this
281 const struct xfrm_type *type;
282 struct xfrm_mode inner_mode;
283 struct xfrm_mode inner_mode_iaf;
284 struct xfrm_mode outer_mode;
286 const struct xfrm_type_offload *type_offload;
288 /* Security context */
289 struct xfrm_sec_ctx *security;
291 /* Private data of this transformer, format is opaque,
292 * interpreted by xfrm_type methods. */
297 static inline struct net *xs_net(struct xfrm_state *x)
299 return read_pnet(&x->xs_net);
302 /* xflags - make enum if more show up */
303 #define XFRM_TIME_DEFER 1
304 #define XFRM_SOFT_EXPIRE 2
315 /* callback structure passed from either netlink or pfkey */
331 struct xfrm_if_decode_session_result {
337 bool (*decode_session)(struct sk_buff *skb,
338 unsigned short family,
339 struct xfrm_if_decode_session_result *res);
342 void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb);
343 void xfrm_if_unregister_cb(void);
348 struct xfrm_policy_afinfo {
349 struct dst_ops *dst_ops;
350 struct dst_entry *(*dst_lookup)(struct net *net,
352 const xfrm_address_t *saddr,
353 const xfrm_address_t *daddr,
355 int (*get_saddr)(struct net *net, int oif,
356 xfrm_address_t *saddr,
357 xfrm_address_t *daddr,
359 int (*fill_dst)(struct xfrm_dst *xdst,
360 struct net_device *dev,
361 const struct flowi *fl);
362 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
365 int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family);
366 void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo);
367 void km_policy_notify(struct xfrm_policy *xp, int dir,
368 const struct km_event *c);
369 void km_state_notify(struct xfrm_state *x, const struct km_event *c);
372 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
373 struct xfrm_policy *pol);
374 void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
375 int __xfrm_state_delete(struct xfrm_state *x);
377 struct xfrm_state_afinfo {
381 const struct xfrm_type_offload *type_offload_esp;
383 const struct xfrm_type *type_esp;
384 const struct xfrm_type *type_ipip;
385 const struct xfrm_type *type_ipip6;
386 const struct xfrm_type *type_comp;
387 const struct xfrm_type *type_ah;
388 const struct xfrm_type *type_routing;
389 const struct xfrm_type *type_dstopts;
391 int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
392 int (*transport_finish)(struct sk_buff *skb,
394 void (*local_error)(struct sk_buff *skb, u32 mtu);
397 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
398 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
399 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
400 struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family);
402 struct xfrm_input_afinfo {
405 int (*callback)(struct sk_buff *skb, u8 protocol,
409 int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo);
410 int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo);
412 void xfrm_flush_gc(void);
413 void xfrm_state_delete_tunnel(struct xfrm_state *x);
416 struct module *owner;
419 #define XFRM_TYPE_NON_FRAGMENT 1
420 #define XFRM_TYPE_REPLAY_PROT 2
421 #define XFRM_TYPE_LOCAL_COADDR 4
422 #define XFRM_TYPE_REMOTE_COADDR 8
424 int (*init_state)(struct xfrm_state *x,
425 struct netlink_ext_ack *extack);
426 void (*destructor)(struct xfrm_state *);
427 int (*input)(struct xfrm_state *, struct sk_buff *skb);
428 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
429 int (*reject)(struct xfrm_state *, struct sk_buff *,
430 const struct flowi *);
433 int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
434 void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
436 struct xfrm_type_offload {
437 struct module *owner;
439 void (*encap)(struct xfrm_state *, struct sk_buff *pskb);
440 int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb);
441 int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features);
444 int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family);
445 void xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family);
447 static inline int xfrm_af2proto(unsigned int family)
459 static inline const struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
461 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
462 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
463 return &x->inner_mode;
465 return &x->inner_mode_iaf;
469 /* id in template is interpreted as:
470 * daddr - destination of tunnel, may be zero for transport mode.
471 * spi - zero to acquire spi. Not zero if spi is static, then
472 * daddr must be fixed too.
473 * proto - AH/ESP/IPCOMP
477 /* Source address of tunnel. Ignored, if it is not a tunnel. */
478 xfrm_address_t saddr;
480 unsigned short encap_family;
484 /* Mode: transport, tunnel etc. */
487 /* Sharing mode: unique, this session only, this user only etc. */
490 /* May skip this transfomration if no SA is found */
493 /* Skip aalgos/ealgos/calgos checks. */
496 /* Bit mask of algos allowed for acquisition */
502 #define XFRM_MAX_DEPTH 6
503 #define XFRM_MAX_OFFLOAD_DEPTH 1
505 struct xfrm_policy_walk_entry {
506 struct list_head all;
510 struct xfrm_policy_walk {
511 struct xfrm_policy_walk_entry walk;
516 struct xfrm_policy_queue {
517 struct sk_buff_head hold_queue;
518 struct timer_list hold_timer;
519 unsigned long timeout;
523 possible_net_t xp_net;
524 struct hlist_node bydst;
525 struct hlist_node byidx;
527 /* This lock only affects elements except for entry. */
531 struct timer_list timer;
537 struct xfrm_mark mark;
538 struct xfrm_selector selector;
539 struct xfrm_lifetime_cfg lft;
540 struct xfrm_lifetime_cur curlft;
541 struct xfrm_policy_walk_entry walk;
542 struct xfrm_policy_queue polq;
549 struct xfrm_sec_ctx *security;
550 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
551 struct hlist_node bydst_inexact_list;
554 struct xfrm_dev_offload xdo;
557 static inline struct net *xp_net(const struct xfrm_policy *xp)
559 return read_pnet(&xp->xp_net);
562 struct xfrm_kmaddress {
563 xfrm_address_t local;
564 xfrm_address_t remote;
569 struct xfrm_migrate {
570 xfrm_address_t old_daddr;
571 xfrm_address_t old_saddr;
572 xfrm_address_t new_daddr;
573 xfrm_address_t new_saddr;
582 #define XFRM_KM_TIMEOUT 30
584 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
585 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
587 /* default aevent timeout in units of 100ms */
588 #define XFRM_AE_ETIME 10
589 /* Async Event timer multiplier */
590 #define XFRM_AE_ETH_M 10
591 /* default seq threshold size */
592 #define XFRM_AE_SEQT_SIZE 2
595 struct list_head list;
596 int (*notify)(struct xfrm_state *x, const struct km_event *c);
597 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
598 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
599 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
600 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
601 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
602 int (*migrate)(const struct xfrm_selector *sel,
604 const struct xfrm_migrate *m,
606 const struct xfrm_kmaddress *k,
607 const struct xfrm_encap_tmpl *encap);
608 bool (*is_alive)(const struct km_event *c);
611 void xfrm_register_km(struct xfrm_mgr *km);
612 void xfrm_unregister_km(struct xfrm_mgr *km);
614 struct xfrm_tunnel_skb_cb {
616 struct inet_skb_parm h4;
617 struct inet6_skb_parm h6;
621 struct ip_tunnel *ip4;
626 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
629 * This structure is used for the duration where packets are being
630 * transformed by IPsec. As soon as the packet leaves IPsec the
631 * area beyond the generic IP part may be overwritten.
634 struct xfrm_tunnel_skb_cb header;
636 /* Sequence number for replay protection. */
649 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
652 * This structure is used by the afinfo prepare_input/prepare_output functions
653 * to transmit header information to the mode input/output functions.
655 struct xfrm_mode_skb_cb {
656 struct xfrm_tunnel_skb_cb header;
658 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
662 /* IP header length (excluding options or extension headers). */
665 /* TOS for IPv4, class for IPv6. */
668 /* TTL for IPv4, hop limitfor IPv6. */
671 /* Protocol for IPv4, NH for IPv6. */
674 /* Option length for IPv4, zero for IPv6. */
677 /* Used by IPv6 only, zero for IPv4. */
681 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
684 * This structure is used by the input processing to locate the SPI and
685 * related information.
687 struct xfrm_spi_skb_cb {
688 struct xfrm_tunnel_skb_cb header;
690 unsigned int daddroff;
695 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
697 #ifdef CONFIG_AUDITSYSCALL
698 static inline struct audit_buffer *xfrm_audit_start(const char *op)
700 struct audit_buffer *audit_buf = NULL;
702 if (audit_enabled == AUDIT_OFF)
704 audit_buf = audit_log_start(audit_context(), GFP_ATOMIC,
705 AUDIT_MAC_IPSEC_EVENT);
706 if (audit_buf == NULL)
708 audit_log_format(audit_buf, "op=%s", op);
712 static inline void xfrm_audit_helper_usrinfo(bool task_valid,
713 struct audit_buffer *audit_buf)
715 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
716 audit_get_loginuid(current) :
718 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
721 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
722 audit_log_task_context(audit_buf);
725 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
726 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
728 void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
729 void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
730 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
731 struct sk_buff *skb);
732 void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
734 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
735 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
737 void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
741 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
746 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
751 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
756 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
761 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
766 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
767 struct sk_buff *skb, __be32 net_seq)
771 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
776 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
777 __be32 net_spi, __be32 net_seq)
781 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
782 struct sk_buff *skb, u8 proto)
785 #endif /* CONFIG_AUDITSYSCALL */
787 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
789 if (likely(policy != NULL))
790 refcount_inc(&policy->refcnt);
793 void xfrm_policy_destroy(struct xfrm_policy *policy);
795 static inline void xfrm_pol_put(struct xfrm_policy *policy)
797 if (refcount_dec_and_test(&policy->refcnt))
798 xfrm_policy_destroy(policy);
801 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
804 for (i = npols - 1; i >= 0; --i)
805 xfrm_pol_put(pols[i]);
808 void __xfrm_state_destroy(struct xfrm_state *, bool);
810 static inline void __xfrm_state_put(struct xfrm_state *x)
812 refcount_dec(&x->refcnt);
815 static inline void xfrm_state_put(struct xfrm_state *x)
817 if (refcount_dec_and_test(&x->refcnt))
818 __xfrm_state_destroy(x, false);
821 static inline void xfrm_state_put_sync(struct xfrm_state *x)
823 if (refcount_dec_and_test(&x->refcnt))
824 __xfrm_state_destroy(x, true);
827 static inline void xfrm_state_hold(struct xfrm_state *x)
829 refcount_inc(&x->refcnt);
832 static inline bool addr_match(const void *token1, const void *token2,
833 unsigned int prefixlen)
835 const __be32 *a1 = token1;
836 const __be32 *a2 = token2;
840 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
841 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
844 if (memcmp(a1, a2, pdw << 2))
850 mask = htonl((0xffffffff) << (32 - pbi));
852 if ((a1[pdw] ^ a2[pdw]) & mask)
859 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
861 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
862 if (sizeof(long) == 4 && prefixlen == 0)
864 return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen)));
868 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
871 switch(fl->flowi_proto) {
874 case IPPROTO_UDPLITE:
876 port = uli->ports.sport;
880 port = htons(uli->icmpt.type);
883 port = htons(uli->mht.type);
886 port = htons(ntohl(uli->gre_key) >> 16);
895 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
898 switch(fl->flowi_proto) {
901 case IPPROTO_UDPLITE:
903 port = uli->ports.dport;
907 port = htons(uli->icmpt.code);
910 port = htons(ntohl(uli->gre_key) & 0xffff);
918 bool xfrm_selector_match(const struct xfrm_selector *sel,
919 const struct flowi *fl, unsigned short family);
921 #ifdef CONFIG_SECURITY_NETWORK_XFRM
922 /* If neither has a context --> match
923 * Otherwise, both must have a context and the sids, doi, alg must match
925 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
927 return ((!s1 && !s2) ||
929 (s1->ctx_sid == s2->ctx_sid) &&
930 (s1->ctx_doi == s2->ctx_doi) &&
931 (s1->ctx_alg == s2->ctx_alg)));
934 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
940 /* A struct encoding bundle of transformations to apply to some set of flow.
942 * xdst->child points to the next element of bundle.
943 * dst->xfrm points to an instanse of transformer.
945 * Due to unfortunate limitations of current routing cache, which we
946 * have no time to fix, it mirrors struct rtable and bound to the same
947 * routing key, including saddr,daddr. However, we can have many of
948 * bundles differing by session id. All the bundles grow from a parent
953 struct dst_entry dst;
957 struct dst_entry *route;
958 struct dst_entry *child;
959 struct dst_entry *path;
960 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
961 int num_pols, num_xfrms;
964 u32 route_mtu_cached;
965 u32 child_mtu_cached;
970 static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst)
973 if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) {
974 const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst;
979 return (struct dst_entry *) dst;
982 static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst)
985 if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) {
986 struct xfrm_dst *xdst = (struct xfrm_dst *) dst;
994 static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child)
999 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
1001 xfrm_pols_put(xdst->pols, xdst->num_pols);
1002 dst_release(xdst->route);
1003 if (likely(xdst->u.dst.xfrm))
1004 xfrm_state_put(xdst->u.dst.xfrm);
1008 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
1010 struct xfrm_if_parms {
1011 int link; /* ifindex of underlying L2 interface */
1012 u32 if_id; /* interface identifyer */
1017 struct xfrm_if __rcu *next; /* next interface in list */
1018 struct net_device *dev; /* virtual device associated with interface */
1019 struct net *net; /* netns for packet i/o */
1020 struct xfrm_if_parms p; /* interface parms */
1022 struct gro_cells gro_cells;
1025 struct xfrm_offload {
1026 /* Output sequence number for replay protection on offloading. */
1033 #define SA_DELETE_REQ 1
1034 #define CRYPTO_DONE 2
1035 #define CRYPTO_NEXT_DONE 4
1036 #define CRYPTO_FALLBACK 8
1037 #define XFRM_GSO_SEGMENT 16
1040 #define XFRM_DEV_RESUME 128
1041 #define XFRM_XMIT 256
1044 #define CRYPTO_SUCCESS 1
1045 #define CRYPTO_GENERIC_ERROR 2
1046 #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
1047 #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
1048 #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
1049 #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
1050 #define CRYPTO_INVALID_PACKET_SYNTAX 64
1051 #define CRYPTO_INVALID_PROTOCOL 128
1062 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1063 struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
1066 struct sec_path *secpath_set(struct sk_buff *skb);
1069 secpath_reset(struct sk_buff *skb)
1072 skb_ext_del(skb, SKB_EXT_SEC_PATH);
1077 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1081 return addr->a4 == 0;
1083 return ipv6_addr_any(&addr->in6);
1089 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1091 return (tmpl->saddr.a4 &&
1092 tmpl->saddr.a4 != x->props.saddr.a4);
1096 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1098 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1099 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1103 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1107 return __xfrm4_state_addr_cmp(tmpl, x);
1109 return __xfrm6_state_addr_cmp(tmpl, x);
1115 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1117 struct sec_path *sp = skb_sec_path(skb);
1119 return sp->xvec[sp->len - 1];
1123 static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1126 struct sec_path *sp = skb_sec_path(skb);
1128 if (!sp || !sp->olen || sp->len != sp->olen)
1131 return &sp->ovec[sp->olen - 1];
1138 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1139 unsigned short family);
1141 static inline bool __xfrm_check_nopolicy(struct net *net, struct sk_buff *skb,
1144 if (!net->xfrm.policy_count[dir] && !secpath_exists(skb))
1145 return net->xfrm.policy_default[dir] == XFRM_USERPOLICY_ACCEPT;
1150 static inline bool __xfrm_check_dev_nopolicy(struct sk_buff *skb,
1151 int dir, unsigned short family)
1153 if (dir != XFRM_POLICY_OUT && family == AF_INET) {
1154 /* same dst may be used for traffic originating from
1155 * devices with different policy settings.
1157 return IPCB(skb)->flags & IPSKB_NOPOLICY;
1159 return skb_dst(skb) && (skb_dst(skb)->flags & DST_NOPOLICY);
1162 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1163 struct sk_buff *skb,
1164 unsigned int family, int reverse)
1166 struct net *net = dev_net(skb->dev);
1167 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1168 struct xfrm_offload *xo = xfrm_offload(skb);
1169 struct xfrm_state *x;
1171 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1172 return __xfrm_policy_check(sk, ndir, skb, family);
1175 x = xfrm_input_state(skb);
1176 if (x->xso.type == XFRM_DEV_OFFLOAD_PACKET)
1177 return (xo->flags & CRYPTO_DONE) &&
1178 (xo->status & CRYPTO_SUCCESS);
1181 return __xfrm_check_nopolicy(net, skb, dir) ||
1182 __xfrm_check_dev_nopolicy(skb, dir, family) ||
1183 __xfrm_policy_check(sk, ndir, skb, family);
1186 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1188 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1191 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1193 return xfrm_policy_check(sk, dir, skb, AF_INET);
1196 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1198 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1201 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1202 struct sk_buff *skb)
1204 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1207 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1208 struct sk_buff *skb)
1210 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1213 int __xfrm_decode_session(struct net *net, struct sk_buff *skb, struct flowi *fl,
1214 unsigned int family, int reverse);
1216 static inline int xfrm_decode_session(struct net *net, struct sk_buff *skb, struct flowi *fl,
1217 unsigned int family)
1219 return __xfrm_decode_session(net, skb, fl, family, 0);
1222 static inline int xfrm_decode_session_reverse(struct net *net, struct sk_buff *skb,
1224 unsigned int family)
1226 return __xfrm_decode_session(net, skb, fl, family, 1);
1229 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1231 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1233 struct net *net = dev_net(skb->dev);
1235 if (!net->xfrm.policy_count[XFRM_POLICY_OUT] &&
1236 net->xfrm.policy_default[XFRM_POLICY_OUT] == XFRM_USERPOLICY_ACCEPT)
1239 return (skb_dst(skb)->flags & DST_NOXFRM) ||
1240 __xfrm_route_forward(skb, family);
1243 static inline int xfrm4_route_forward(struct sk_buff *skb)
1245 return xfrm_route_forward(skb, AF_INET);
1248 static inline int xfrm6_route_forward(struct sk_buff *skb)
1250 return xfrm_route_forward(skb, AF_INET6);
1253 int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1255 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1257 if (!sk_fullsock(osk))
1259 sk->sk_policy[0] = NULL;
1260 sk->sk_policy[1] = NULL;
1261 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1262 return __xfrm_sk_clone_policy(sk, osk);
1266 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1268 static inline void xfrm_sk_free_policy(struct sock *sk)
1270 struct xfrm_policy *pol;
1272 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1273 if (unlikely(pol != NULL)) {
1274 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1275 sk->sk_policy[0] = NULL;
1277 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1278 if (unlikely(pol != NULL)) {
1279 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1280 sk->sk_policy[1] = NULL;
1286 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1287 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1288 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1289 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1290 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1294 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1298 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1302 static inline int xfrm_decode_session_reverse(struct net *net, struct sk_buff *skb,
1304 unsigned int family)
1308 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1309 struct sk_buff *skb)
1313 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1314 struct sk_buff *skb)
1321 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1325 return (xfrm_address_t *)&fl->u.ip4.daddr;
1327 return (xfrm_address_t *)&fl->u.ip6.daddr;
1333 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1337 return (xfrm_address_t *)&fl->u.ip4.saddr;
1339 return (xfrm_address_t *)&fl->u.ip6.saddr;
1345 void xfrm_flowi_addr_get(const struct flowi *fl,
1346 xfrm_address_t *saddr, xfrm_address_t *daddr,
1347 unsigned short family)
1351 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1352 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1355 saddr->in6 = fl->u.ip6.saddr;
1356 daddr->in6 = fl->u.ip6.daddr;
1361 static __inline__ int
1362 __xfrm4_state_addr_check(const struct xfrm_state *x,
1363 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1365 if (daddr->a4 == x->id.daddr.a4 &&
1366 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1371 static __inline__ int
1372 __xfrm6_state_addr_check(const struct xfrm_state *x,
1373 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1375 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1376 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1377 ipv6_addr_any((struct in6_addr *)saddr) ||
1378 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1383 static __inline__ int
1384 xfrm_state_addr_check(const struct xfrm_state *x,
1385 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1386 unsigned short family)
1390 return __xfrm4_state_addr_check(x, daddr, saddr);
1392 return __xfrm6_state_addr_check(x, daddr, saddr);
1397 static __inline__ int
1398 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1399 unsigned short family)
1403 return __xfrm4_state_addr_check(x,
1404 (const xfrm_address_t *)&fl->u.ip4.daddr,
1405 (const xfrm_address_t *)&fl->u.ip4.saddr);
1407 return __xfrm6_state_addr_check(x,
1408 (const xfrm_address_t *)&fl->u.ip6.daddr,
1409 (const xfrm_address_t *)&fl->u.ip6.saddr);
1414 static inline int xfrm_state_kern(const struct xfrm_state *x)
1416 return atomic_read(&x->tunnel_users);
1419 static inline bool xfrm_id_proto_valid(u8 proto)
1425 #if IS_ENABLED(CONFIG_IPV6)
1426 case IPPROTO_ROUTING:
1427 case IPPROTO_DSTOPTS:
1435 /* IPSEC_PROTO_ANY only matches 3 IPsec protocols, 0 could match all. */
1436 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1438 return (!userproto || proto == userproto ||
1439 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1440 proto == IPPROTO_ESP ||
1441 proto == IPPROTO_COMP)));
1445 * xfrm algorithm information
1447 struct xfrm_algo_aead_info {
1452 struct xfrm_algo_auth_info {
1457 struct xfrm_algo_encr_info {
1463 struct xfrm_algo_comp_info {
1467 struct xfrm_algo_desc {
1471 u8 pfkey_supported:1;
1473 struct xfrm_algo_aead_info aead;
1474 struct xfrm_algo_auth_info auth;
1475 struct xfrm_algo_encr_info encr;
1476 struct xfrm_algo_comp_info comp;
1478 struct sadb_alg desc;
1481 /* XFRM protocol handlers. */
1482 struct xfrm4_protocol {
1483 int (*handler)(struct sk_buff *skb);
1484 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1486 int (*cb_handler)(struct sk_buff *skb, int err);
1487 int (*err_handler)(struct sk_buff *skb, u32 info);
1489 struct xfrm4_protocol __rcu *next;
1493 struct xfrm6_protocol {
1494 int (*handler)(struct sk_buff *skb);
1495 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1497 int (*cb_handler)(struct sk_buff *skb, int err);
1498 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1499 u8 type, u8 code, int offset, __be32 info);
1501 struct xfrm6_protocol __rcu *next;
1505 /* XFRM tunnel handlers. */
1506 struct xfrm_tunnel {
1507 int (*handler)(struct sk_buff *skb);
1508 int (*cb_handler)(struct sk_buff *skb, int err);
1509 int (*err_handler)(struct sk_buff *skb, u32 info);
1511 struct xfrm_tunnel __rcu *next;
1515 struct xfrm6_tunnel {
1516 int (*handler)(struct sk_buff *skb);
1517 int (*cb_handler)(struct sk_buff *skb, int err);
1518 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1519 u8 type, u8 code, int offset, __be32 info);
1520 struct xfrm6_tunnel __rcu *next;
1524 void xfrm_init(void);
1525 void xfrm4_init(void);
1526 int xfrm_state_init(struct net *net);
1527 void xfrm_state_fini(struct net *net);
1528 void xfrm4_state_init(void);
1529 void xfrm4_protocol_init(void);
1531 int xfrm6_init(void);
1532 void xfrm6_fini(void);
1533 int xfrm6_state_init(void);
1534 void xfrm6_state_fini(void);
1535 int xfrm6_protocol_init(void);
1536 void xfrm6_protocol_fini(void);
1538 static inline int xfrm6_init(void)
1542 static inline void xfrm6_fini(void)
1548 #ifdef CONFIG_XFRM_STATISTICS
1549 int xfrm_proc_init(struct net *net);
1550 void xfrm_proc_fini(struct net *net);
1553 int xfrm_sysctl_init(struct net *net);
1554 #ifdef CONFIG_SYSCTL
1555 void xfrm_sysctl_fini(struct net *net);
1557 static inline void xfrm_sysctl_fini(struct net *net)
1562 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1563 struct xfrm_address_filter *filter);
1564 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1565 int (*func)(struct xfrm_state *, int, void*), void *);
1566 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1567 struct xfrm_state *xfrm_state_alloc(struct net *net);
1568 void xfrm_state_free(struct xfrm_state *x);
1569 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1570 const xfrm_address_t *saddr,
1571 const struct flowi *fl,
1572 struct xfrm_tmpl *tmpl,
1573 struct xfrm_policy *pol, int *err,
1574 unsigned short family, u32 if_id);
1575 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
1576 xfrm_address_t *daddr,
1577 xfrm_address_t *saddr,
1578 unsigned short family,
1579 u8 mode, u8 proto, u32 reqid);
1580 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1581 unsigned short family);
1582 int xfrm_state_check_expire(struct xfrm_state *x);
1583 void xfrm_state_update_stats(struct net *net);
1584 #ifdef CONFIG_XFRM_OFFLOAD
1585 static inline void xfrm_dev_state_update_stats(struct xfrm_state *x)
1587 struct xfrm_dev_offload *xdo = &x->xso;
1588 struct net_device *dev = xdo->dev;
1590 if (dev && dev->xfrmdev_ops &&
1591 dev->xfrmdev_ops->xdo_dev_state_update_stats)
1592 dev->xfrmdev_ops->xdo_dev_state_update_stats(x);
1596 static inline void xfrm_dev_state_update_stats(struct xfrm_state *x) {}
1598 void xfrm_state_insert(struct xfrm_state *x);
1599 int xfrm_state_add(struct xfrm_state *x);
1600 int xfrm_state_update(struct xfrm_state *x);
1601 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1602 const xfrm_address_t *daddr, __be32 spi,
1603 u8 proto, unsigned short family);
1604 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1605 const xfrm_address_t *daddr,
1606 const xfrm_address_t *saddr,
1608 unsigned short family);
1609 #ifdef CONFIG_XFRM_SUB_POLICY
1610 void xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1611 unsigned short family);
1612 void xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1613 unsigned short family);
1615 static inline void xfrm_tmpl_sort(struct xfrm_tmpl **d, struct xfrm_tmpl **s,
1616 int n, unsigned short family)
1620 static inline void xfrm_state_sort(struct xfrm_state **d, struct xfrm_state **s,
1621 int n, unsigned short family)
1626 struct xfrmk_sadinfo {
1627 u32 sadhcnt; /* current hash bkts */
1628 u32 sadhmcnt; /* max allowed hash bkts */
1629 u32 sadcnt; /* current running count */
1632 struct xfrmk_spdinfo {
1643 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1644 int xfrm_state_delete(struct xfrm_state *x);
1645 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync);
1646 int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
1647 int xfrm_dev_policy_flush(struct net *net, struct net_device *dev,
1649 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1650 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1651 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1652 int xfrm_init_replay(struct xfrm_state *x, struct netlink_ext_ack *extack);
1653 u32 xfrm_state_mtu(struct xfrm_state *x, int mtu);
1654 int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload,
1655 struct netlink_ext_ack *extack);
1656 int xfrm_init_state(struct xfrm_state *x);
1657 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1658 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1659 int xfrm_trans_queue_net(struct net *net, struct sk_buff *skb,
1660 int (*finish)(struct net *, struct sock *,
1662 int xfrm_trans_queue(struct sk_buff *skb,
1663 int (*finish)(struct net *, struct sock *,
1665 int xfrm_output_resume(struct sock *sk, struct sk_buff *skb, int err);
1666 int xfrm_output(struct sock *sk, struct sk_buff *skb);
1668 #if IS_ENABLED(CONFIG_NET_PKTGEN)
1669 int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb);
1672 void xfrm_local_error(struct sk_buff *skb, int mtu);
1673 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1675 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1676 int xfrm4_rcv(struct sk_buff *skb);
1678 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1680 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1681 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1682 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1683 return xfrm_input(skb, nexthdr, spi, 0);
1686 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1687 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1688 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1689 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1690 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1691 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1692 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1694 int xfrm6_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1696 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1697 int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1698 int xfrm6_rcv(struct sk_buff *skb);
1699 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1700 xfrm_address_t *saddr, u8 proto);
1701 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1702 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1703 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1704 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1705 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1706 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1707 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1708 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1711 void xfrm6_local_rxpmtu(struct sk_buff *skb, u32 mtu);
1712 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1713 int xfrm6_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1714 struct sk_buff *xfrm4_gro_udp_encap_rcv(struct sock *sk, struct list_head *head,
1715 struct sk_buff *skb);
1716 struct sk_buff *xfrm6_gro_udp_encap_rcv(struct sock *sk, struct list_head *head,
1717 struct sk_buff *skb);
1718 int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval,
1721 static inline int xfrm_user_policy(struct sock *sk, int optname,
1722 sockptr_t optval, int optlen)
1724 return -ENOPROTOOPT;
1728 struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
1729 const xfrm_address_t *saddr,
1730 const xfrm_address_t *daddr,
1731 int family, u32 mark);
1733 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1735 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1736 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1737 int (*func)(struct xfrm_policy *, int, int, void*),
1739 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1740 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1741 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net,
1742 const struct xfrm_mark *mark,
1743 u32 if_id, u8 type, int dir,
1744 struct xfrm_selector *sel,
1745 struct xfrm_sec_ctx *ctx, int delete,
1747 struct xfrm_policy *xfrm_policy_byid(struct net *net,
1748 const struct xfrm_mark *mark, u32 if_id,
1749 u8 type, int dir, u32 id, int delete,
1751 int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1752 void xfrm_policy_hash_rebuild(struct net *net);
1753 u32 xfrm_get_acqseq(void);
1754 int verify_spi_info(u8 proto, u32 min, u32 max, struct netlink_ext_ack *extack);
1755 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi,
1756 struct netlink_ext_ack *extack);
1757 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1758 u8 mode, u32 reqid, u32 if_id, u8 proto,
1759 const xfrm_address_t *daddr,
1760 const xfrm_address_t *saddr, int create,
1761 unsigned short family);
1762 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1764 #ifdef CONFIG_XFRM_MIGRATE
1765 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1766 const struct xfrm_migrate *m, int num_bundles,
1767 const struct xfrm_kmaddress *k,
1768 const struct xfrm_encap_tmpl *encap);
1769 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net,
1771 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1772 struct xfrm_migrate *m,
1773 struct xfrm_encap_tmpl *encap);
1774 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1775 struct xfrm_migrate *m, int num_bundles,
1776 struct xfrm_kmaddress *k, struct net *net,
1777 struct xfrm_encap_tmpl *encap, u32 if_id,
1778 struct netlink_ext_ack *extack);
1781 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1782 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1783 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1784 xfrm_address_t *addr);
1786 void xfrm_input_init(void);
1787 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1789 void xfrm_probe_algs(void);
1790 int xfrm_count_pfkey_auth_supported(void);
1791 int xfrm_count_pfkey_enc_supported(void);
1792 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1793 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1794 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1795 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1796 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1797 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1798 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1799 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1800 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1803 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1804 const xfrm_address_t *b)
1806 return ipv6_addr_equal((const struct in6_addr *)a,
1807 (const struct in6_addr *)b);
1810 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1811 const xfrm_address_t *b,
1817 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1819 return xfrm6_addr_equal(a, b);
1823 static inline int xfrm_policy_id2dir(u32 index)
1829 void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq);
1830 int xfrm_replay_check(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq);
1831 void xfrm_replay_notify(struct xfrm_state *x, int event);
1832 int xfrm_replay_overflow(struct xfrm_state *x, struct sk_buff *skb);
1833 int xfrm_replay_recheck(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq);
1835 static inline int xfrm_aevent_is_on(struct net *net)
1841 nlsk = rcu_dereference(net->xfrm.nlsk);
1843 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1848 static inline int xfrm_acquire_is_on(struct net *net)
1854 nlsk = rcu_dereference(net->xfrm.nlsk);
1856 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1863 static inline unsigned int aead_len(struct xfrm_algo_aead *alg)
1865 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1868 static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
1870 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1873 static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1875 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1878 static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1880 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1883 #ifdef CONFIG_XFRM_MIGRATE
1884 static inline int xfrm_replay_clone(struct xfrm_state *x,
1885 struct xfrm_state *orig)
1888 x->replay_esn = kmemdup(orig->replay_esn,
1889 xfrm_replay_state_esn_len(orig->replay_esn),
1893 x->preplay_esn = kmemdup(orig->preplay_esn,
1894 xfrm_replay_state_esn_len(orig->preplay_esn),
1896 if (!x->preplay_esn)
1902 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1904 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1908 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1910 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1913 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1915 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1918 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1921 for (i = 0; i < n; i++)
1922 xfrm_state_put(*(states + i));
1925 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1928 for (i = 0; i < n; i++)
1929 xfrm_state_delete(*(states + i));
1933 void __init xfrm_dev_init(void);
1935 #ifdef CONFIG_XFRM_OFFLOAD
1936 void xfrm_dev_resume(struct sk_buff *skb);
1937 void xfrm_dev_backlog(struct softnet_data *sd);
1938 struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again);
1939 int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
1940 struct xfrm_user_offload *xuo,
1941 struct netlink_ext_ack *extack);
1942 int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp,
1943 struct xfrm_user_offload *xuo, u8 dir,
1944 struct netlink_ext_ack *extack);
1945 bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
1947 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1949 struct xfrm_dev_offload *xso = &x->xso;
1951 if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn)
1952 xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x);
1955 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1957 struct xfrm_state *x = dst->xfrm;
1958 struct xfrm_dst *xdst;
1960 if (!x || !x->type_offload)
1963 xdst = (struct xfrm_dst *) dst;
1964 if (!x->xso.offload_handle && !xdst->child->xfrm)
1966 if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) &&
1973 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1975 struct xfrm_dev_offload *xso = &x->xso;
1978 xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
1981 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1983 struct xfrm_dev_offload *xso = &x->xso;
1984 struct net_device *dev = xso->dev;
1986 if (dev && dev->xfrmdev_ops) {
1987 if (dev->xfrmdev_ops->xdo_dev_state_free)
1988 dev->xfrmdev_ops->xdo_dev_state_free(x);
1990 xso->type = XFRM_DEV_OFFLOAD_UNSPECIFIED;
1991 netdev_put(dev, &xso->dev_tracker);
1995 static inline void xfrm_dev_policy_delete(struct xfrm_policy *x)
1997 struct xfrm_dev_offload *xdo = &x->xdo;
1998 struct net_device *dev = xdo->dev;
2000 if (dev && dev->xfrmdev_ops && dev->xfrmdev_ops->xdo_dev_policy_delete)
2001 dev->xfrmdev_ops->xdo_dev_policy_delete(x);
2004 static inline void xfrm_dev_policy_free(struct xfrm_policy *x)
2006 struct xfrm_dev_offload *xdo = &x->xdo;
2007 struct net_device *dev = xdo->dev;
2009 if (dev && dev->xfrmdev_ops) {
2010 if (dev->xfrmdev_ops->xdo_dev_policy_free)
2011 dev->xfrmdev_ops->xdo_dev_policy_free(x);
2013 netdev_put(dev, &xdo->dev_tracker);
2017 static inline void xfrm_dev_resume(struct sk_buff *skb)
2021 static inline void xfrm_dev_backlog(struct softnet_data *sd)
2025 static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again)
2030 static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo, struct netlink_ext_ack *extack)
2035 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
2039 static inline void xfrm_dev_state_free(struct xfrm_state *x)
2043 static inline int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp,
2044 struct xfrm_user_offload *xuo, u8 dir,
2045 struct netlink_ext_ack *extack)
2050 static inline void xfrm_dev_policy_delete(struct xfrm_policy *x)
2054 static inline void xfrm_dev_policy_free(struct xfrm_policy *x)
2058 static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
2063 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
2067 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
2073 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
2075 if (attrs[XFRMA_MARK])
2076 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
2083 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
2088 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
2092 static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x)
2094 struct xfrm_mark *m = &x->props.smark;
2096 return (m->v & m->m) | (mark & ~m->m);
2099 static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id)
2104 ret = nla_put_u32(skb, XFRMA_IF_ID, if_id);
2108 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
2109 unsigned int family)
2111 bool tunnel = false;
2115 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
2119 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
2123 if (tunnel && !(x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL))
2129 extern const int xfrm_msg_min[XFRM_NR_MSGTYPES];
2130 extern const struct nla_policy xfrma_policy[XFRMA_MAX+1];
2132 struct xfrm_translator {
2133 /* Allocate frag_list and put compat translation there */
2134 int (*alloc_compat)(struct sk_buff *skb, const struct nlmsghdr *src);
2136 /* Allocate nlmsg with 64-bit translaton of received 32-bit message */
2137 struct nlmsghdr *(*rcv_msg_compat)(const struct nlmsghdr *nlh,
2138 int maxtype, const struct nla_policy *policy,
2139 struct netlink_ext_ack *extack);
2141 /* Translate 32-bit user_policy from sockptr */
2142 int (*xlate_user_policy_sockptr)(u8 **pdata32, int optlen);
2144 struct module *owner;
2147 #if IS_ENABLED(CONFIG_XFRM_USER_COMPAT)
2148 extern int xfrm_register_translator(struct xfrm_translator *xtr);
2149 extern int xfrm_unregister_translator(struct xfrm_translator *xtr);
2150 extern struct xfrm_translator *xfrm_get_translator(void);
2151 extern void xfrm_put_translator(struct xfrm_translator *xtr);
2153 static inline struct xfrm_translator *xfrm_get_translator(void)
2157 static inline void xfrm_put_translator(struct xfrm_translator *xtr)
2162 #if IS_ENABLED(CONFIG_IPV6)
2163 static inline bool xfrm6_local_dontfrag(const struct sock *sk)
2167 if (!sk || sk->sk_family != AF_INET6)
2170 proto = sk->sk_protocol;
2171 if (proto == IPPROTO_UDP || proto == IPPROTO_RAW)
2172 return inet6_test_bit(DONTFRAG, sk);
2178 #if (IS_BUILTIN(CONFIG_XFRM_INTERFACE) && IS_ENABLED(CONFIG_DEBUG_INFO_BTF)) || \
2179 (IS_MODULE(CONFIG_XFRM_INTERFACE) && IS_ENABLED(CONFIG_DEBUG_INFO_BTF_MODULES))
2181 extern struct metadata_dst __percpu *xfrm_bpf_md_dst;
2183 int register_xfrm_interface_bpf(void);
2187 static inline int register_xfrm_interface_bpf(void)
2194 #if IS_ENABLED(CONFIG_DEBUG_INFO_BTF)
2195 int register_xfrm_state_bpf(void);
2197 static inline int register_xfrm_state_bpf(void)
2203 #endif /* _NET_XFRM_H */