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
1103 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1104 struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
1107 static inline struct sec_path *
1108 secpath_get(struct sec_path *sp)
1111 refcount_inc(&sp->refcnt);
1115 void __secpath_destroy(struct sec_path *sp);
1118 secpath_put(struct sec_path *sp)
1120 if (sp && refcount_dec_and_test(&sp->refcnt))
1121 __secpath_destroy(sp);
1124 struct sec_path *secpath_dup(struct sec_path *src);
1125 struct sec_path *secpath_set(struct sk_buff *skb);
1128 secpath_reset(struct sk_buff *skb)
1131 secpath_put(skb->sp);
1137 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1141 return addr->a4 == 0;
1143 return ipv6_addr_any(&addr->in6);
1149 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1151 return (tmpl->saddr.a4 &&
1152 tmpl->saddr.a4 != x->props.saddr.a4);
1156 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1158 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1159 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1163 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1167 return __xfrm4_state_addr_cmp(tmpl, x);
1169 return __xfrm6_state_addr_cmp(tmpl, x);
1175 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1176 unsigned short family);
1178 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1179 struct sk_buff *skb,
1180 unsigned int family, int reverse)
1182 struct net *net = dev_net(skb->dev);
1183 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1185 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1186 return __xfrm_policy_check(sk, ndir, skb, family);
1188 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
1189 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1190 __xfrm_policy_check(sk, ndir, skb, family);
1193 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1195 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1198 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1200 return xfrm_policy_check(sk, dir, skb, AF_INET);
1203 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1205 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1208 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1209 struct sk_buff *skb)
1211 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1214 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1215 struct sk_buff *skb)
1217 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1220 int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1221 unsigned int family, int reverse);
1223 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1224 unsigned int family)
1226 return __xfrm_decode_session(skb, fl, family, 0);
1229 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1231 unsigned int family)
1233 return __xfrm_decode_session(skb, fl, family, 1);
1236 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1238 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1240 struct net *net = dev_net(skb->dev);
1242 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1243 (skb_dst(skb)->flags & DST_NOXFRM) ||
1244 __xfrm_route_forward(skb, family);
1247 static inline int xfrm4_route_forward(struct sk_buff *skb)
1249 return xfrm_route_forward(skb, AF_INET);
1252 static inline int xfrm6_route_forward(struct sk_buff *skb)
1254 return xfrm_route_forward(skb, AF_INET6);
1257 int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1259 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1261 sk->sk_policy[0] = NULL;
1262 sk->sk_policy[1] = NULL;
1263 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1264 return __xfrm_sk_clone_policy(sk, osk);
1268 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1270 static inline void xfrm_sk_free_policy(struct sock *sk)
1272 struct xfrm_policy *pol;
1274 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1275 if (unlikely(pol != NULL)) {
1276 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1277 sk->sk_policy[0] = NULL;
1279 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1280 if (unlikely(pol != NULL)) {
1281 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1282 sk->sk_policy[1] = NULL;
1288 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1289 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1290 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1291 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1292 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1296 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1300 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1304 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1306 unsigned int family)
1310 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1311 struct sk_buff *skb)
1315 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1316 struct sk_buff *skb)
1323 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1327 return (xfrm_address_t *)&fl->u.ip4.daddr;
1329 return (xfrm_address_t *)&fl->u.ip6.daddr;
1335 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1339 return (xfrm_address_t *)&fl->u.ip4.saddr;
1341 return (xfrm_address_t *)&fl->u.ip6.saddr;
1347 void xfrm_flowi_addr_get(const struct flowi *fl,
1348 xfrm_address_t *saddr, xfrm_address_t *daddr,
1349 unsigned short family)
1353 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1354 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1357 saddr->in6 = fl->u.ip6.saddr;
1358 daddr->in6 = fl->u.ip6.daddr;
1363 static __inline__ int
1364 __xfrm4_state_addr_check(const struct xfrm_state *x,
1365 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1367 if (daddr->a4 == x->id.daddr.a4 &&
1368 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1373 static __inline__ int
1374 __xfrm6_state_addr_check(const struct xfrm_state *x,
1375 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1377 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1378 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1379 ipv6_addr_any((struct in6_addr *)saddr) ||
1380 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1385 static __inline__ int
1386 xfrm_state_addr_check(const struct xfrm_state *x,
1387 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1388 unsigned short family)
1392 return __xfrm4_state_addr_check(x, daddr, saddr);
1394 return __xfrm6_state_addr_check(x, daddr, saddr);
1399 static __inline__ int
1400 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1401 unsigned short family)
1405 return __xfrm4_state_addr_check(x,
1406 (const xfrm_address_t *)&fl->u.ip4.daddr,
1407 (const xfrm_address_t *)&fl->u.ip4.saddr);
1409 return __xfrm6_state_addr_check(x,
1410 (const xfrm_address_t *)&fl->u.ip6.daddr,
1411 (const xfrm_address_t *)&fl->u.ip6.saddr);
1416 static inline int xfrm_state_kern(const struct xfrm_state *x)
1418 return atomic_read(&x->tunnel_users);
1421 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1423 return (!userproto || proto == userproto ||
1424 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1425 proto == IPPROTO_ESP ||
1426 proto == IPPROTO_COMP)));
1430 * xfrm algorithm information
1432 struct xfrm_algo_aead_info {
1437 struct xfrm_algo_auth_info {
1442 struct xfrm_algo_encr_info {
1448 struct xfrm_algo_comp_info {
1452 struct xfrm_algo_desc {
1456 u8 pfkey_supported:1;
1458 struct xfrm_algo_aead_info aead;
1459 struct xfrm_algo_auth_info auth;
1460 struct xfrm_algo_encr_info encr;
1461 struct xfrm_algo_comp_info comp;
1463 struct sadb_alg desc;
1466 /* XFRM protocol handlers. */
1467 struct xfrm4_protocol {
1468 int (*handler)(struct sk_buff *skb);
1469 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1471 int (*cb_handler)(struct sk_buff *skb, int err);
1472 int (*err_handler)(struct sk_buff *skb, u32 info);
1474 struct xfrm4_protocol __rcu *next;
1478 struct xfrm6_protocol {
1479 int (*handler)(struct sk_buff *skb);
1480 int (*cb_handler)(struct sk_buff *skb, int err);
1481 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1482 u8 type, u8 code, int offset, __be32 info);
1484 struct xfrm6_protocol __rcu *next;
1488 /* XFRM tunnel handlers. */
1489 struct xfrm_tunnel {
1490 int (*handler)(struct sk_buff *skb);
1491 int (*err_handler)(struct sk_buff *skb, u32 info);
1493 struct xfrm_tunnel __rcu *next;
1497 struct xfrm6_tunnel {
1498 int (*handler)(struct sk_buff *skb);
1499 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1500 u8 type, u8 code, int offset, __be32 info);
1501 struct xfrm6_tunnel __rcu *next;
1505 void xfrm_init(void);
1506 void xfrm4_init(void);
1507 int xfrm_state_init(struct net *net);
1508 void xfrm_state_fini(struct net *net);
1509 void xfrm4_state_init(void);
1510 void xfrm4_protocol_init(void);
1512 int xfrm6_init(void);
1513 void xfrm6_fini(void);
1514 int xfrm6_state_init(void);
1515 void xfrm6_state_fini(void);
1516 int xfrm6_protocol_init(void);
1517 void xfrm6_protocol_fini(void);
1519 static inline int xfrm6_init(void)
1523 static inline void xfrm6_fini(void)
1529 #ifdef CONFIG_XFRM_STATISTICS
1530 int xfrm_proc_init(struct net *net);
1531 void xfrm_proc_fini(struct net *net);
1534 int xfrm_sysctl_init(struct net *net);
1535 #ifdef CONFIG_SYSCTL
1536 void xfrm_sysctl_fini(struct net *net);
1538 static inline void xfrm_sysctl_fini(struct net *net)
1543 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1544 struct xfrm_address_filter *filter);
1545 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1546 int (*func)(struct xfrm_state *, int, void*), void *);
1547 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1548 struct xfrm_state *xfrm_state_alloc(struct net *net);
1549 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1550 const xfrm_address_t *saddr,
1551 const struct flowi *fl,
1552 struct xfrm_tmpl *tmpl,
1553 struct xfrm_policy *pol, int *err,
1554 unsigned short family, u32 if_id);
1555 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
1556 xfrm_address_t *daddr,
1557 xfrm_address_t *saddr,
1558 unsigned short family,
1559 u8 mode, u8 proto, u32 reqid);
1560 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1561 unsigned short family);
1562 int xfrm_state_check_expire(struct xfrm_state *x);
1563 void xfrm_state_insert(struct xfrm_state *x);
1564 int xfrm_state_add(struct xfrm_state *x);
1565 int xfrm_state_update(struct xfrm_state *x);
1566 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1567 const xfrm_address_t *daddr, __be32 spi,
1568 u8 proto, unsigned short family);
1569 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1570 const xfrm_address_t *daddr,
1571 const xfrm_address_t *saddr,
1573 unsigned short family);
1574 #ifdef CONFIG_XFRM_SUB_POLICY
1575 int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1576 unsigned short family, struct net *net);
1577 int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1578 unsigned short family);
1580 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1581 int n, unsigned short family, struct net *net)
1586 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1587 int n, unsigned short family)
1593 struct xfrmk_sadinfo {
1594 u32 sadhcnt; /* current hash bkts */
1595 u32 sadhmcnt; /* max allowed hash bkts */
1596 u32 sadcnt; /* current running count */
1599 struct xfrmk_spdinfo {
1610 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1611 int xfrm_state_delete(struct xfrm_state *x);
1612 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid);
1613 int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
1614 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1615 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1616 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1617 int xfrm_init_replay(struct xfrm_state *x);
1618 int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1619 int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload);
1620 int xfrm_init_state(struct xfrm_state *x);
1621 int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1622 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1623 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1624 int xfrm_trans_queue(struct sk_buff *skb,
1625 int (*finish)(struct net *, struct sock *,
1627 int xfrm_output_resume(struct sk_buff *skb, int err);
1628 int xfrm_output(struct sock *sk, struct sk_buff *skb);
1629 int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1630 void xfrm_local_error(struct sk_buff *skb, int mtu);
1631 int xfrm4_extract_header(struct sk_buff *skb);
1632 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1633 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1635 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1636 int xfrm4_rcv(struct sk_buff *skb);
1637 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1639 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1641 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1642 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1643 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1644 return xfrm_input(skb, nexthdr, spi, 0);
1647 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1648 int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1649 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1650 int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1651 int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1652 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1653 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1654 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1655 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1656 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1657 int xfrm6_extract_header(struct sk_buff *skb);
1658 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1659 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1661 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1662 int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1663 int xfrm6_rcv(struct sk_buff *skb);
1664 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1665 xfrm_address_t *saddr, u8 proto);
1666 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1667 int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1668 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1669 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1670 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1671 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1672 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1673 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1674 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1675 int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1676 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1677 int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1678 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1682 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1683 int xfrm_user_policy(struct sock *sk, int optname,
1684 u8 __user *optval, int optlen);
1686 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1688 return -ENOPROTOOPT;
1691 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1693 /* should not happen */
1699 struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
1700 const xfrm_address_t *saddr,
1701 const xfrm_address_t *daddr,
1702 int family, u32 mark);
1704 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1706 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1707 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1708 int (*func)(struct xfrm_policy *, int, int, void*),
1710 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1711 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1712 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, u32 if_id,
1714 struct xfrm_selector *sel,
1715 struct xfrm_sec_ctx *ctx, int delete,
1717 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u32 if_id, u8,
1718 int dir, u32 id, int delete, int *err);
1719 int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1720 void xfrm_policy_hash_rebuild(struct net *net);
1721 u32 xfrm_get_acqseq(void);
1722 int verify_spi_info(u8 proto, u32 min, u32 max);
1723 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1724 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1725 u8 mode, u32 reqid, u32 if_id, u8 proto,
1726 const xfrm_address_t *daddr,
1727 const xfrm_address_t *saddr, int create,
1728 unsigned short family);
1729 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1731 #ifdef CONFIG_XFRM_MIGRATE
1732 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1733 const struct xfrm_migrate *m, int num_bundles,
1734 const struct xfrm_kmaddress *k,
1735 const struct xfrm_encap_tmpl *encap);
1736 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1737 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1738 struct xfrm_migrate *m,
1739 struct xfrm_encap_tmpl *encap);
1740 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1741 struct xfrm_migrate *m, int num_bundles,
1742 struct xfrm_kmaddress *k, struct net *net,
1743 struct xfrm_encap_tmpl *encap);
1746 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1747 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1748 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1749 xfrm_address_t *addr);
1751 void xfrm_input_init(void);
1752 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1754 void xfrm_probe_algs(void);
1755 int xfrm_count_pfkey_auth_supported(void);
1756 int xfrm_count_pfkey_enc_supported(void);
1757 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1758 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1759 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1760 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1761 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1762 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1763 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1764 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1765 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1768 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1769 const xfrm_address_t *b)
1771 return ipv6_addr_equal((const struct in6_addr *)a,
1772 (const struct in6_addr *)b);
1775 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1776 const xfrm_address_t *b,
1782 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1784 return xfrm6_addr_equal(a, b);
1788 static inline int xfrm_policy_id2dir(u32 index)
1794 static inline int xfrm_aevent_is_on(struct net *net)
1800 nlsk = rcu_dereference(net->xfrm.nlsk);
1802 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1807 static inline int xfrm_acquire_is_on(struct net *net)
1813 nlsk = rcu_dereference(net->xfrm.nlsk);
1815 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1822 static inline unsigned int aead_len(struct xfrm_algo_aead *alg)
1824 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1827 static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
1829 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1832 static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1834 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1837 static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1839 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1842 #ifdef CONFIG_XFRM_MIGRATE
1843 static inline int xfrm_replay_clone(struct xfrm_state *x,
1844 struct xfrm_state *orig)
1846 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1851 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1852 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1854 x->preplay_esn = kmemdup(x->replay_esn,
1855 xfrm_replay_state_esn_len(x->replay_esn),
1857 if (!x->preplay_esn) {
1858 kfree(x->replay_esn);
1865 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1867 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1871 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1873 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1876 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1878 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1881 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1884 for (i = 0; i < n; i++)
1885 xfrm_state_put(*(states + i));
1888 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1891 for (i = 0; i < n; i++)
1892 xfrm_state_delete(*(states + i));
1897 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1899 struct sec_path *sp = skb_sec_path(skb);
1901 return sp->xvec[sp->len - 1];
1905 static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1908 struct sec_path *sp = skb_sec_path(skb);
1910 if (!sp || !sp->olen || sp->len != sp->olen)
1913 return &sp->ovec[sp->olen - 1];
1919 void __init xfrm_dev_init(void);
1921 #ifdef CONFIG_XFRM_OFFLOAD
1922 void xfrm_dev_resume(struct sk_buff *skb);
1923 void xfrm_dev_backlog(struct softnet_data *sd);
1924 struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again);
1925 int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
1926 struct xfrm_user_offload *xuo);
1927 bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
1929 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1931 struct xfrm_state_offload *xso = &x->xso;
1933 if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn)
1934 xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x);
1937 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1939 struct xfrm_state *x = dst->xfrm;
1940 struct xfrm_dst *xdst;
1942 if (!x || !x->type_offload)
1945 xdst = (struct xfrm_dst *) dst;
1946 if (!x->xso.offload_handle && !xdst->child->xfrm)
1948 if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) &&
1955 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1957 struct xfrm_state_offload *xso = &x->xso;
1960 xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
1963 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1965 struct xfrm_state_offload *xso = &x->xso;
1966 struct net_device *dev = xso->dev;
1968 if (dev && dev->xfrmdev_ops) {
1969 if (dev->xfrmdev_ops->xdo_dev_state_free)
1970 dev->xfrmdev_ops->xdo_dev_state_free(x);
1976 static inline void xfrm_dev_resume(struct sk_buff *skb)
1980 static inline void xfrm_dev_backlog(struct softnet_data *sd)
1984 static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again)
1989 static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
1994 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1998 static inline void xfrm_dev_state_free(struct xfrm_state *x)
2002 static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
2007 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
2011 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
2017 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
2019 if (attrs[XFRMA_MARK])
2020 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
2027 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
2032 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
2036 static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x)
2038 struct xfrm_mark *m = &x->props.smark;
2040 return (m->v & m->m) | (mark & ~m->m);
2043 static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id)
2048 ret = nla_put_u32(skb, XFRMA_IF_ID, if_id);
2052 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
2053 unsigned int family)
2055 bool tunnel = false;
2059 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
2063 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
2067 if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL))
2072 #endif /* _NET_XFRM_H */