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);
427 * Remove encapsulation header.
429 * The IP header will be moved over the top of the encapsulation
432 * On entry, the transport header shall point to where the IP header
433 * should be and the network header shall be set to where the IP
434 * header currently is. skb->data shall point to the start of the
437 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
440 * This is the actual input entry point.
442 * For transport mode and equivalent this would be identical to
443 * input2 (which does not need to be set). While tunnel mode
444 * and equivalent would set this to the tunnel encapsulation function
445 * xfrm4_prepare_input that would in turn call input2.
447 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
450 * Add encapsulation header.
452 * On exit, the transport header will be set to the start of the
453 * encapsulation header to be filled in by x->type->output and
454 * the mac header will be set to the nextheader (protocol for
455 * IPv4) field of the extension header directly preceding the
456 * encapsulation header, or in its absence, that of the top IP
457 * header. The value of the network header will always point
458 * to the top IP header while skb->data will point to the payload.
460 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
463 * This is the actual output entry point.
465 * For transport mode and equivalent this would be identical to
466 * output2 (which does not need to be set). While tunnel mode
467 * and equivalent would set this to a tunnel encapsulation function
468 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
471 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
474 * Adjust pointers into the packet and do GSO segmentation.
476 struct sk_buff *(*gso_segment)(struct xfrm_state *x, struct sk_buff *skb, netdev_features_t features);
479 * Adjust pointers into the packet when IPsec is done at layer2.
481 void (*xmit)(struct xfrm_state *x, struct sk_buff *skb);
483 struct xfrm_state_afinfo *afinfo;
484 struct module *owner;
489 /* Flags for xfrm_mode. */
491 XFRM_MODE_FLAG_TUNNEL = 1,
494 int xfrm_register_mode(struct xfrm_mode *mode, int family);
495 int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
497 static inline int xfrm_af2proto(unsigned int family)
509 static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
511 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
512 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
513 return x->inner_mode;
515 return x->inner_mode_iaf;
519 /* id in template is interpreted as:
520 * daddr - destination of tunnel, may be zero for transport mode.
521 * spi - zero to acquire spi. Not zero if spi is static, then
522 * daddr must be fixed too.
523 * proto - AH/ESP/IPCOMP
527 /* Source address of tunnel. Ignored, if it is not a tunnel. */
528 xfrm_address_t saddr;
530 unsigned short encap_family;
534 /* Mode: transport, tunnel etc. */
537 /* Sharing mode: unique, this session only, this user only etc. */
540 /* May skip this transfomration if no SA is found */
543 /* Skip aalgos/ealgos/calgos checks. */
546 /* Bit mask of algos allowed for acquisition */
552 #define XFRM_MAX_DEPTH 6
553 #define XFRM_MAX_OFFLOAD_DEPTH 1
555 struct xfrm_policy_walk_entry {
556 struct list_head all;
560 struct xfrm_policy_walk {
561 struct xfrm_policy_walk_entry walk;
566 struct xfrm_policy_queue {
567 struct sk_buff_head hold_queue;
568 struct timer_list hold_timer;
569 unsigned long timeout;
573 possible_net_t xp_net;
574 struct hlist_node bydst;
575 struct hlist_node byidx;
577 /* This lock only affects elements except for entry. */
581 struct timer_list timer;
587 struct xfrm_mark mark;
588 struct xfrm_selector selector;
589 struct xfrm_lifetime_cfg lft;
590 struct xfrm_lifetime_cur curlft;
591 struct xfrm_policy_walk_entry walk;
592 struct xfrm_policy_queue polq;
599 struct xfrm_sec_ctx *security;
600 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
601 struct hlist_node bydst_inexact_list;
605 static inline struct net *xp_net(const struct xfrm_policy *xp)
607 return read_pnet(&xp->xp_net);
610 struct xfrm_kmaddress {
611 xfrm_address_t local;
612 xfrm_address_t remote;
617 struct xfrm_migrate {
618 xfrm_address_t old_daddr;
619 xfrm_address_t old_saddr;
620 xfrm_address_t new_daddr;
621 xfrm_address_t new_saddr;
630 #define XFRM_KM_TIMEOUT 30
632 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
633 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
635 /* default aevent timeout in units of 100ms */
636 #define XFRM_AE_ETIME 10
637 /* Async Event timer multiplier */
638 #define XFRM_AE_ETH_M 10
639 /* default seq threshold size */
640 #define XFRM_AE_SEQT_SIZE 2
643 struct list_head list;
644 int (*notify)(struct xfrm_state *x, const struct km_event *c);
645 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
646 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
647 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
648 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
649 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
650 int (*migrate)(const struct xfrm_selector *sel,
652 const struct xfrm_migrate *m,
654 const struct xfrm_kmaddress *k,
655 const struct xfrm_encap_tmpl *encap);
656 bool (*is_alive)(const struct km_event *c);
659 int xfrm_register_km(struct xfrm_mgr *km);
660 int xfrm_unregister_km(struct xfrm_mgr *km);
662 struct xfrm_tunnel_skb_cb {
664 struct inet_skb_parm h4;
665 struct inet6_skb_parm h6;
669 struct ip_tunnel *ip4;
674 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
677 * This structure is used for the duration where packets are being
678 * transformed by IPsec. As soon as the packet leaves IPsec the
679 * area beyond the generic IP part may be overwritten.
682 struct xfrm_tunnel_skb_cb header;
684 /* Sequence number for replay protection. */
697 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
700 * This structure is used by the afinfo prepare_input/prepare_output functions
701 * to transmit header information to the mode input/output functions.
703 struct xfrm_mode_skb_cb {
704 struct xfrm_tunnel_skb_cb header;
706 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
710 /* IP header length (excluding options or extension headers). */
713 /* TOS for IPv4, class for IPv6. */
716 /* TTL for IPv4, hop limitfor IPv6. */
719 /* Protocol for IPv4, NH for IPv6. */
722 /* Option length for IPv4, zero for IPv6. */
725 /* Used by IPv6 only, zero for IPv4. */
729 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
732 * This structure is used by the input processing to locate the SPI and
733 * related information.
735 struct xfrm_spi_skb_cb {
736 struct xfrm_tunnel_skb_cb header;
738 unsigned int daddroff;
743 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
745 #ifdef CONFIG_AUDITSYSCALL
746 static inline struct audit_buffer *xfrm_audit_start(const char *op)
748 struct audit_buffer *audit_buf = NULL;
750 if (audit_enabled == AUDIT_OFF)
752 audit_buf = audit_log_start(audit_context(), GFP_ATOMIC,
753 AUDIT_MAC_IPSEC_EVENT);
754 if (audit_buf == NULL)
756 audit_log_format(audit_buf, "op=%s", op);
760 static inline void xfrm_audit_helper_usrinfo(bool task_valid,
761 struct audit_buffer *audit_buf)
763 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
764 audit_get_loginuid(current) :
766 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
769 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
770 audit_log_task_context(audit_buf);
773 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
774 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
776 void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
777 void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
778 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
779 struct sk_buff *skb);
780 void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
782 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
783 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
785 void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
789 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
794 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
799 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
804 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
809 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
814 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
815 struct sk_buff *skb, __be32 net_seq)
819 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
824 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
825 __be32 net_spi, __be32 net_seq)
829 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
830 struct sk_buff *skb, u8 proto)
833 #endif /* CONFIG_AUDITSYSCALL */
835 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
837 if (likely(policy != NULL))
838 refcount_inc(&policy->refcnt);
841 void xfrm_policy_destroy(struct xfrm_policy *policy);
843 static inline void xfrm_pol_put(struct xfrm_policy *policy)
845 if (refcount_dec_and_test(&policy->refcnt))
846 xfrm_policy_destroy(policy);
849 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
852 for (i = npols - 1; i >= 0; --i)
853 xfrm_pol_put(pols[i]);
856 void __xfrm_state_destroy(struct xfrm_state *);
858 static inline void __xfrm_state_put(struct xfrm_state *x)
860 refcount_dec(&x->refcnt);
863 static inline void xfrm_state_put(struct xfrm_state *x)
865 if (refcount_dec_and_test(&x->refcnt))
866 __xfrm_state_destroy(x);
869 static inline void xfrm_state_hold(struct xfrm_state *x)
871 refcount_inc(&x->refcnt);
874 static inline bool addr_match(const void *token1, const void *token2,
875 unsigned int prefixlen)
877 const __be32 *a1 = token1;
878 const __be32 *a2 = token2;
882 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
883 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
886 if (memcmp(a1, a2, pdw << 2))
892 mask = htonl((0xffffffff) << (32 - pbi));
894 if ((a1[pdw] ^ a2[pdw]) & mask)
901 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
903 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
904 if (sizeof(long) == 4 && prefixlen == 0)
906 return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen)));
910 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
913 switch(fl->flowi_proto) {
916 case IPPROTO_UDPLITE:
918 port = uli->ports.sport;
922 port = htons(uli->icmpt.type);
925 port = htons(uli->mht.type);
928 port = htons(ntohl(uli->gre_key) >> 16);
937 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
940 switch(fl->flowi_proto) {
943 case IPPROTO_UDPLITE:
945 port = uli->ports.dport;
949 port = htons(uli->icmpt.code);
952 port = htons(ntohl(uli->gre_key) & 0xffff);
960 bool xfrm_selector_match(const struct xfrm_selector *sel,
961 const struct flowi *fl, unsigned short family);
963 #ifdef CONFIG_SECURITY_NETWORK_XFRM
964 /* If neither has a context --> match
965 * Otherwise, both must have a context and the sids, doi, alg must match
967 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
969 return ((!s1 && !s2) ||
971 (s1->ctx_sid == s2->ctx_sid) &&
972 (s1->ctx_doi == s2->ctx_doi) &&
973 (s1->ctx_alg == s2->ctx_alg)));
976 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
982 /* A struct encoding bundle of transformations to apply to some set of flow.
984 * xdst->child points to the next element of bundle.
985 * dst->xfrm points to an instanse of transformer.
987 * Due to unfortunate limitations of current routing cache, which we
988 * have no time to fix, it mirrors struct rtable and bound to the same
989 * routing key, including saddr,daddr. However, we can have many of
990 * bundles differing by session id. All the bundles grow from a parent
995 struct dst_entry dst;
999 struct dst_entry *route;
1000 struct dst_entry *child;
1001 struct dst_entry *path;
1002 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
1003 int num_pols, num_xfrms;
1006 u32 route_mtu_cached;
1007 u32 child_mtu_cached;
1012 static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst)
1016 const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst;
1021 return (struct dst_entry *) dst;
1024 static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst)
1028 struct xfrm_dst *xdst = (struct xfrm_dst *) dst;
1036 static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child)
1038 xdst->child = child;
1041 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
1043 xfrm_pols_put(xdst->pols, xdst->num_pols);
1044 dst_release(xdst->route);
1045 if (likely(xdst->u.dst.xfrm))
1046 xfrm_state_put(xdst->u.dst.xfrm);
1050 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
1052 struct xfrm_if_parms {
1053 char name[IFNAMSIZ]; /* name of XFRM device */
1054 int link; /* ifindex of underlying L2 interface */
1055 u32 if_id; /* interface identifyer */
1059 struct xfrm_if __rcu *next; /* next interface in list */
1060 struct net_device *dev; /* virtual device associated with interface */
1061 struct net_device *phydev; /* physical device */
1062 struct net *net; /* netns for packet i/o */
1063 struct xfrm_if_parms p; /* interface parms */
1065 struct gro_cells gro_cells;
1068 struct xfrm_offload {
1069 /* Output sequence number for replay protection on offloading. */
1076 #define SA_DELETE_REQ 1
1077 #define CRYPTO_DONE 2
1078 #define CRYPTO_NEXT_DONE 4
1079 #define CRYPTO_FALLBACK 8
1080 #define XFRM_GSO_SEGMENT 16
1082 #define XFRM_ESP_NO_TRAILER 64
1083 #define XFRM_DEV_RESUME 128
1086 #define CRYPTO_SUCCESS 1
1087 #define CRYPTO_GENERIC_ERROR 2
1088 #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
1089 #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
1090 #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
1091 #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
1092 #define CRYPTO_INVALID_PACKET_SYNTAX 64
1093 #define CRYPTO_INVALID_PROTOCOL 128
1102 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1103 struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
1106 struct sec_path *secpath_set(struct sk_buff *skb);
1109 secpath_reset(struct sk_buff *skb)
1112 skb_ext_del(skb, SKB_EXT_SEC_PATH);
1117 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1121 return addr->a4 == 0;
1123 return ipv6_addr_any(&addr->in6);
1129 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1131 return (tmpl->saddr.a4 &&
1132 tmpl->saddr.a4 != x->props.saddr.a4);
1136 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1138 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1139 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1143 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1147 return __xfrm4_state_addr_cmp(tmpl, x);
1149 return __xfrm6_state_addr_cmp(tmpl, x);
1155 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1156 unsigned short family);
1158 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1159 struct sk_buff *skb,
1160 unsigned int family, int reverse)
1162 struct net *net = dev_net(skb->dev);
1163 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1165 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1166 return __xfrm_policy_check(sk, ndir, skb, family);
1168 return (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) ||
1169 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1170 __xfrm_policy_check(sk, ndir, skb, family);
1173 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1175 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1178 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1180 return xfrm_policy_check(sk, dir, skb, AF_INET);
1183 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1185 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1188 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1189 struct sk_buff *skb)
1191 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1194 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1195 struct sk_buff *skb)
1197 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1200 int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1201 unsigned int family, int reverse);
1203 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1204 unsigned int family)
1206 return __xfrm_decode_session(skb, fl, family, 0);
1209 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1211 unsigned int family)
1213 return __xfrm_decode_session(skb, fl, family, 1);
1216 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1218 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1220 struct net *net = dev_net(skb->dev);
1222 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1223 (skb_dst(skb)->flags & DST_NOXFRM) ||
1224 __xfrm_route_forward(skb, family);
1227 static inline int xfrm4_route_forward(struct sk_buff *skb)
1229 return xfrm_route_forward(skb, AF_INET);
1232 static inline int xfrm6_route_forward(struct sk_buff *skb)
1234 return xfrm_route_forward(skb, AF_INET6);
1237 int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1239 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1241 sk->sk_policy[0] = NULL;
1242 sk->sk_policy[1] = NULL;
1243 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1244 return __xfrm_sk_clone_policy(sk, osk);
1248 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1250 static inline void xfrm_sk_free_policy(struct sock *sk)
1252 struct xfrm_policy *pol;
1254 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1255 if (unlikely(pol != NULL)) {
1256 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1257 sk->sk_policy[0] = NULL;
1259 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1260 if (unlikely(pol != NULL)) {
1261 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1262 sk->sk_policy[1] = NULL;
1268 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1269 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1270 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1271 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1272 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1276 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1280 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1284 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1286 unsigned int family)
1290 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1291 struct sk_buff *skb)
1295 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1296 struct sk_buff *skb)
1303 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1307 return (xfrm_address_t *)&fl->u.ip4.daddr;
1309 return (xfrm_address_t *)&fl->u.ip6.daddr;
1315 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1319 return (xfrm_address_t *)&fl->u.ip4.saddr;
1321 return (xfrm_address_t *)&fl->u.ip6.saddr;
1327 void xfrm_flowi_addr_get(const struct flowi *fl,
1328 xfrm_address_t *saddr, xfrm_address_t *daddr,
1329 unsigned short family)
1333 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1334 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1337 saddr->in6 = fl->u.ip6.saddr;
1338 daddr->in6 = fl->u.ip6.daddr;
1343 static __inline__ int
1344 __xfrm4_state_addr_check(const struct xfrm_state *x,
1345 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1347 if (daddr->a4 == x->id.daddr.a4 &&
1348 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1353 static __inline__ int
1354 __xfrm6_state_addr_check(const struct xfrm_state *x,
1355 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1357 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1358 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1359 ipv6_addr_any((struct in6_addr *)saddr) ||
1360 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1365 static __inline__ int
1366 xfrm_state_addr_check(const struct xfrm_state *x,
1367 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1368 unsigned short family)
1372 return __xfrm4_state_addr_check(x, daddr, saddr);
1374 return __xfrm6_state_addr_check(x, daddr, saddr);
1379 static __inline__ int
1380 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1381 unsigned short family)
1385 return __xfrm4_state_addr_check(x,
1386 (const xfrm_address_t *)&fl->u.ip4.daddr,
1387 (const xfrm_address_t *)&fl->u.ip4.saddr);
1389 return __xfrm6_state_addr_check(x,
1390 (const xfrm_address_t *)&fl->u.ip6.daddr,
1391 (const xfrm_address_t *)&fl->u.ip6.saddr);
1396 static inline int xfrm_state_kern(const struct xfrm_state *x)
1398 return atomic_read(&x->tunnel_users);
1401 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1403 return (!userproto || proto == userproto ||
1404 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1405 proto == IPPROTO_ESP ||
1406 proto == IPPROTO_COMP)));
1410 * xfrm algorithm information
1412 struct xfrm_algo_aead_info {
1417 struct xfrm_algo_auth_info {
1422 struct xfrm_algo_encr_info {
1428 struct xfrm_algo_comp_info {
1432 struct xfrm_algo_desc {
1436 u8 pfkey_supported:1;
1438 struct xfrm_algo_aead_info aead;
1439 struct xfrm_algo_auth_info auth;
1440 struct xfrm_algo_encr_info encr;
1441 struct xfrm_algo_comp_info comp;
1443 struct sadb_alg desc;
1446 /* XFRM protocol handlers. */
1447 struct xfrm4_protocol {
1448 int (*handler)(struct sk_buff *skb);
1449 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1451 int (*cb_handler)(struct sk_buff *skb, int err);
1452 int (*err_handler)(struct sk_buff *skb, u32 info);
1454 struct xfrm4_protocol __rcu *next;
1458 struct xfrm6_protocol {
1459 int (*handler)(struct sk_buff *skb);
1460 int (*cb_handler)(struct sk_buff *skb, int err);
1461 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1462 u8 type, u8 code, int offset, __be32 info);
1464 struct xfrm6_protocol __rcu *next;
1468 /* XFRM tunnel handlers. */
1469 struct xfrm_tunnel {
1470 int (*handler)(struct sk_buff *skb);
1471 int (*err_handler)(struct sk_buff *skb, u32 info);
1473 struct xfrm_tunnel __rcu *next;
1477 struct xfrm6_tunnel {
1478 int (*handler)(struct sk_buff *skb);
1479 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1480 u8 type, u8 code, int offset, __be32 info);
1481 struct xfrm6_tunnel __rcu *next;
1485 void xfrm_init(void);
1486 void xfrm4_init(void);
1487 int xfrm_state_init(struct net *net);
1488 void xfrm_state_fini(struct net *net);
1489 void xfrm4_state_init(void);
1490 void xfrm4_protocol_init(void);
1492 int xfrm6_init(void);
1493 void xfrm6_fini(void);
1494 int xfrm6_state_init(void);
1495 void xfrm6_state_fini(void);
1496 int xfrm6_protocol_init(void);
1497 void xfrm6_protocol_fini(void);
1499 static inline int xfrm6_init(void)
1503 static inline void xfrm6_fini(void)
1509 #ifdef CONFIG_XFRM_STATISTICS
1510 int xfrm_proc_init(struct net *net);
1511 void xfrm_proc_fini(struct net *net);
1514 int xfrm_sysctl_init(struct net *net);
1515 #ifdef CONFIG_SYSCTL
1516 void xfrm_sysctl_fini(struct net *net);
1518 static inline void xfrm_sysctl_fini(struct net *net)
1523 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1524 struct xfrm_address_filter *filter);
1525 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1526 int (*func)(struct xfrm_state *, int, void*), void *);
1527 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1528 struct xfrm_state *xfrm_state_alloc(struct net *net);
1529 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1530 const xfrm_address_t *saddr,
1531 const struct flowi *fl,
1532 struct xfrm_tmpl *tmpl,
1533 struct xfrm_policy *pol, int *err,
1534 unsigned short family, u32 if_id);
1535 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
1536 xfrm_address_t *daddr,
1537 xfrm_address_t *saddr,
1538 unsigned short family,
1539 u8 mode, u8 proto, u32 reqid);
1540 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1541 unsigned short family);
1542 int xfrm_state_check_expire(struct xfrm_state *x);
1543 void xfrm_state_insert(struct xfrm_state *x);
1544 int xfrm_state_add(struct xfrm_state *x);
1545 int xfrm_state_update(struct xfrm_state *x);
1546 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1547 const xfrm_address_t *daddr, __be32 spi,
1548 u8 proto, unsigned short family);
1549 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1550 const xfrm_address_t *daddr,
1551 const xfrm_address_t *saddr,
1553 unsigned short family);
1554 #ifdef CONFIG_XFRM_SUB_POLICY
1555 int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1556 unsigned short family, struct net *net);
1557 int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1558 unsigned short family);
1560 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1561 int n, unsigned short family, struct net *net)
1566 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1567 int n, unsigned short family)
1573 struct xfrmk_sadinfo {
1574 u32 sadhcnt; /* current hash bkts */
1575 u32 sadhmcnt; /* max allowed hash bkts */
1576 u32 sadcnt; /* current running count */
1579 struct xfrmk_spdinfo {
1590 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1591 int xfrm_state_delete(struct xfrm_state *x);
1592 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid);
1593 int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
1594 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1595 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1596 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1597 int xfrm_init_replay(struct xfrm_state *x);
1598 int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1599 int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload);
1600 int xfrm_init_state(struct xfrm_state *x);
1601 int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1602 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1603 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1604 int xfrm_trans_queue(struct sk_buff *skb,
1605 int (*finish)(struct net *, struct sock *,
1607 int xfrm_output_resume(struct sk_buff *skb, int err);
1608 int xfrm_output(struct sock *sk, struct sk_buff *skb);
1609 int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1610 void xfrm_local_error(struct sk_buff *skb, int mtu);
1611 int xfrm4_extract_header(struct sk_buff *skb);
1612 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1613 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1615 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1616 int xfrm4_rcv(struct sk_buff *skb);
1617 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1619 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1621 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1622 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1623 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1624 return xfrm_input(skb, nexthdr, spi, 0);
1627 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1628 int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1629 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1630 int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1631 int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1632 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1633 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1634 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1635 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1636 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1637 int xfrm6_extract_header(struct sk_buff *skb);
1638 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1639 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1641 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1642 int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1643 int xfrm6_rcv(struct sk_buff *skb);
1644 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1645 xfrm_address_t *saddr, u8 proto);
1646 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1647 int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1648 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1649 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1650 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1651 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1652 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1653 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1654 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1655 int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1656 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1657 int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1658 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1662 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1663 int xfrm_user_policy(struct sock *sk, int optname,
1664 u8 __user *optval, int optlen);
1666 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1668 return -ENOPROTOOPT;
1671 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1673 /* should not happen */
1679 struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
1680 const xfrm_address_t *saddr,
1681 const xfrm_address_t *daddr,
1682 int family, u32 mark);
1684 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1686 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1687 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1688 int (*func)(struct xfrm_policy *, int, int, void*),
1690 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1691 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1692 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, u32 if_id,
1694 struct xfrm_selector *sel,
1695 struct xfrm_sec_ctx *ctx, int delete,
1697 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u32 if_id, u8,
1698 int dir, u32 id, int delete, int *err);
1699 int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1700 void xfrm_policy_hash_rebuild(struct net *net);
1701 u32 xfrm_get_acqseq(void);
1702 int verify_spi_info(u8 proto, u32 min, u32 max);
1703 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1704 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1705 u8 mode, u32 reqid, u32 if_id, u8 proto,
1706 const xfrm_address_t *daddr,
1707 const xfrm_address_t *saddr, int create,
1708 unsigned short family);
1709 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1711 #ifdef CONFIG_XFRM_MIGRATE
1712 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1713 const struct xfrm_migrate *m, int num_bundles,
1714 const struct xfrm_kmaddress *k,
1715 const struct xfrm_encap_tmpl *encap);
1716 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1717 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1718 struct xfrm_migrate *m,
1719 struct xfrm_encap_tmpl *encap);
1720 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1721 struct xfrm_migrate *m, int num_bundles,
1722 struct xfrm_kmaddress *k, struct net *net,
1723 struct xfrm_encap_tmpl *encap);
1726 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1727 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1728 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1729 xfrm_address_t *addr);
1731 void xfrm_input_init(void);
1732 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1734 void xfrm_probe_algs(void);
1735 int xfrm_count_pfkey_auth_supported(void);
1736 int xfrm_count_pfkey_enc_supported(void);
1737 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1738 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1739 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1740 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1741 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1742 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1743 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1744 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1745 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1748 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1749 const xfrm_address_t *b)
1751 return ipv6_addr_equal((const struct in6_addr *)a,
1752 (const struct in6_addr *)b);
1755 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1756 const xfrm_address_t *b,
1762 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1764 return xfrm6_addr_equal(a, b);
1768 static inline int xfrm_policy_id2dir(u32 index)
1774 static inline int xfrm_aevent_is_on(struct net *net)
1780 nlsk = rcu_dereference(net->xfrm.nlsk);
1782 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1787 static inline int xfrm_acquire_is_on(struct net *net)
1793 nlsk = rcu_dereference(net->xfrm.nlsk);
1795 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1802 static inline unsigned int aead_len(struct xfrm_algo_aead *alg)
1804 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1807 static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
1809 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1812 static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1814 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1817 static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1819 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1822 #ifdef CONFIG_XFRM_MIGRATE
1823 static inline int xfrm_replay_clone(struct xfrm_state *x,
1824 struct xfrm_state *orig)
1826 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1831 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1832 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1834 x->preplay_esn = kmemdup(x->replay_esn,
1835 xfrm_replay_state_esn_len(x->replay_esn),
1837 if (!x->preplay_esn) {
1838 kfree(x->replay_esn);
1845 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1847 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1851 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1853 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1856 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1858 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1861 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1864 for (i = 0; i < n; i++)
1865 xfrm_state_put(*(states + i));
1868 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1871 for (i = 0; i < n; i++)
1872 xfrm_state_delete(*(states + i));
1877 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1879 struct sec_path *sp = skb_sec_path(skb);
1881 return sp->xvec[sp->len - 1];
1885 static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1888 struct sec_path *sp = skb_sec_path(skb);
1890 if (!sp || !sp->olen || sp->len != sp->olen)
1893 return &sp->ovec[sp->olen - 1];
1899 void __init xfrm_dev_init(void);
1901 #ifdef CONFIG_XFRM_OFFLOAD
1902 void xfrm_dev_resume(struct sk_buff *skb);
1903 void xfrm_dev_backlog(struct softnet_data *sd);
1904 struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again);
1905 int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
1906 struct xfrm_user_offload *xuo);
1907 bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
1909 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1911 struct xfrm_state_offload *xso = &x->xso;
1913 if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn)
1914 xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x);
1917 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1919 struct xfrm_state *x = dst->xfrm;
1920 struct xfrm_dst *xdst;
1922 if (!x || !x->type_offload)
1925 xdst = (struct xfrm_dst *) dst;
1926 if (!x->xso.offload_handle && !xdst->child->xfrm)
1928 if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) &&
1935 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1937 struct xfrm_state_offload *xso = &x->xso;
1940 xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
1943 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1945 struct xfrm_state_offload *xso = &x->xso;
1946 struct net_device *dev = xso->dev;
1948 if (dev && dev->xfrmdev_ops) {
1949 if (dev->xfrmdev_ops->xdo_dev_state_free)
1950 dev->xfrmdev_ops->xdo_dev_state_free(x);
1956 static inline void xfrm_dev_resume(struct sk_buff *skb)
1960 static inline void xfrm_dev_backlog(struct softnet_data *sd)
1964 static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again)
1969 static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
1974 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1978 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1982 static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
1987 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1991 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1997 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1999 if (attrs[XFRMA_MARK])
2000 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
2007 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
2012 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
2016 static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x)
2018 struct xfrm_mark *m = &x->props.smark;
2020 return (m->v & m->m) | (mark & ~m->m);
2023 static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id)
2028 ret = nla_put_u32(skb, XFRMA_IF_ID, if_id);
2032 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
2033 unsigned int family)
2035 bool tunnel = false;
2039 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
2043 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
2047 if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL))
2052 #endif /* _NET_XFRM_H */