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>
27 #include <linux/interrupt.h>
29 #ifdef CONFIG_XFRM_STATISTICS
33 #define XFRM_PROTO_ESP 50
34 #define XFRM_PROTO_AH 51
35 #define XFRM_PROTO_COMP 108
36 #define XFRM_PROTO_IPIP 4
37 #define XFRM_PROTO_IPV6 41
38 #define XFRM_PROTO_ROUTING IPPROTO_ROUTING
39 #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
41 #define XFRM_ALIGN4(len) (((len) + 3) & ~3)
42 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
43 #define MODULE_ALIAS_XFRM_MODE(family, encap) \
44 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
45 #define MODULE_ALIAS_XFRM_TYPE(family, proto) \
46 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
47 #define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \
48 MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto))
50 #ifdef CONFIG_XFRM_STATISTICS
51 #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
53 #define XFRM_INC_STATS(net, field) ((void)(net))
57 /* Organization of SPD aka "XFRM rules"
58 ------------------------------------
61 - policy rule, struct xfrm_policy (=SPD entry)
62 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
63 - instance of a transformer, struct xfrm_state (=SA)
64 - template to clone xfrm_state, struct xfrm_tmpl
66 SPD is plain linear list of xfrm_policy rules, ordered by priority.
67 (To be compatible with existing pfkeyv2 implementations,
68 many rules with priority of 0x7fffffff are allowed to exist and
69 such rules are ordered in an unpredictable way, thanks to bsd folks.)
71 Lookup is plain linear search until the first match with selector.
73 If "action" is "block", then we prohibit the flow, otherwise:
74 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
75 policy entry has list of up to XFRM_MAX_DEPTH transformations,
76 described by templates xfrm_tmpl. Each template is resolved
77 to a complete xfrm_state (see below) and we pack bundle of transformations
78 to a dst_entry returned to requestor.
80 dst -. xfrm .-> xfrm_state #1
81 |---. child .-> dst -. xfrm .-> xfrm_state #2
82 |---. child .-> dst -. xfrm .-> xfrm_state #3
85 Bundles are cached at xrfm_policy struct (field ->bundles).
88 Resolution of xrfm_tmpl
89 -----------------------
91 1. ->mode Mode: transport or tunnel
92 2. ->id.proto Protocol: AH/ESP/IPCOMP
93 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
94 Q: allow to resolve security gateway?
95 4. ->id.spi If not zero, static SPI.
96 5. ->saddr Local tunnel endpoint, ignored for transport mode.
97 6. ->algos List of allowed algos. Plain bitmask now.
98 Q: ealgos, aalgos, calgos. What a mess...
99 7. ->share Sharing mode.
100 Q: how to implement private sharing mode? To add struct sock* to
103 Having this template we search through SAD searching for entries
104 with appropriate mode/proto/algo, permitted by selector.
105 If no appropriate entry found, it is requested from key manager.
108 Q: How to find all the bundles referring to a physical path for
109 PMTU discovery? Seems, dst should contain list of all parents...
110 and enter to infinite locking hierarchy disaster.
111 No! It is easier, we will not search for them, let them find us.
112 We add genid to each dst plus pointer to genid of raw IP route,
113 pmtu disc will update pmtu on raw IP route and increase its genid.
114 dst_check() will see this for top level and trigger resyncing
115 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
118 struct xfrm_state_walk {
119 struct list_head all;
124 struct xfrm_address_filter *filter;
127 struct xfrm_state_offload {
128 struct net_device *dev;
129 unsigned long offload_handle;
130 unsigned int num_exthdrs;
134 /* Full description of state of transformer. */
136 possible_net_t xs_net;
138 struct hlist_node gclist;
139 struct hlist_node bydst;
141 struct hlist_node bysrc;
142 struct hlist_node byspi;
148 struct xfrm_selector sel;
149 struct xfrm_mark mark;
154 /* Key manager bits */
155 struct xfrm_state_walk km;
157 /* Parameters of this state. */
162 u8 aalgo, ealgo, calgo;
165 xfrm_address_t saddr;
172 struct xfrm_lifetime_cfg lft;
174 /* Data for transformer */
175 struct xfrm_algo_auth *aalg;
176 struct xfrm_algo *ealg;
177 struct xfrm_algo *calg;
178 struct xfrm_algo_aead *aead;
181 /* Data for encapsulator */
182 struct xfrm_encap_tmpl *encap;
184 /* Data for care-of address */
185 xfrm_address_t *coaddr;
187 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
188 struct xfrm_state *tunnel;
190 /* If a tunnel, number of users + 1 */
191 atomic_t tunnel_users;
193 /* State for replay detection */
194 struct xfrm_replay_state replay;
195 struct xfrm_replay_state_esn *replay_esn;
197 /* Replay detection state at the time we sent the last notification */
198 struct xfrm_replay_state preplay;
199 struct xfrm_replay_state_esn *preplay_esn;
201 /* The functions for replay detection. */
202 const struct xfrm_replay *repl;
204 /* internal flag that only holds state for delayed aevent at the
209 /* Replay detection notification settings */
213 /* Replay detection notification timer */
214 struct timer_list rtimer;
217 struct xfrm_stats stats;
219 struct xfrm_lifetime_cur curlft;
220 struct tasklet_hrtimer mtimer;
222 struct xfrm_state_offload xso;
224 /* used to fix curlft->add_time when changing date */
228 unsigned long lastused;
230 struct page_frag xfrag;
232 /* Reference to data common to all the instances of this
234 const struct xfrm_type *type;
235 struct xfrm_mode *inner_mode;
236 struct xfrm_mode *inner_mode_iaf;
237 struct xfrm_mode *outer_mode;
239 const struct xfrm_type_offload *type_offload;
241 /* Security context */
242 struct xfrm_sec_ctx *security;
244 /* Private data of this transformer, format is opaque,
245 * interpreted by xfrm_type methods. */
249 static inline struct net *xs_net(struct xfrm_state *x)
251 return read_pnet(&x->xs_net);
254 /* xflags - make enum if more show up */
255 #define XFRM_TIME_DEFER 1
256 #define XFRM_SOFT_EXPIRE 2
267 /* callback structure passed from either netlink or pfkey */
284 void (*advance)(struct xfrm_state *x, __be32 net_seq);
285 int (*check)(struct xfrm_state *x,
288 int (*recheck)(struct xfrm_state *x,
291 void (*notify)(struct xfrm_state *x, int event);
292 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
298 struct xfrm_policy_afinfo {
299 struct dst_ops *dst_ops;
300 struct dst_entry *(*dst_lookup)(struct net *net,
302 const xfrm_address_t *saddr,
303 const xfrm_address_t *daddr,
305 int (*get_saddr)(struct net *net, int oif,
306 xfrm_address_t *saddr,
307 xfrm_address_t *daddr,
309 void (*decode_session)(struct sk_buff *skb,
312 int (*get_tos)(const struct flowi *fl);
313 int (*init_path)(struct xfrm_dst *path,
314 struct dst_entry *dst,
316 int (*fill_dst)(struct xfrm_dst *xdst,
317 struct net_device *dev,
318 const struct flowi *fl);
319 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
322 int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family);
323 void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo);
324 void km_policy_notify(struct xfrm_policy *xp, int dir,
325 const struct km_event *c);
326 void xfrm_policy_cache_flush(void);
327 void km_state_notify(struct xfrm_state *x, const struct km_event *c);
330 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
331 struct xfrm_policy *pol);
332 void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
333 int __xfrm_state_delete(struct xfrm_state *x);
335 struct xfrm_state_afinfo {
339 struct module *owner;
340 const struct xfrm_type *type_map[IPPROTO_MAX];
341 const struct xfrm_type_offload *type_offload_map[IPPROTO_MAX];
342 struct xfrm_mode *mode_map[XFRM_MODE_MAX];
344 int (*init_flags)(struct xfrm_state *x);
345 void (*init_tempsel)(struct xfrm_selector *sel,
346 const struct flowi *fl);
347 void (*init_temprop)(struct xfrm_state *x,
348 const struct xfrm_tmpl *tmpl,
349 const xfrm_address_t *daddr,
350 const xfrm_address_t *saddr);
351 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
352 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
353 int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
354 int (*output_finish)(struct sock *sk, struct sk_buff *skb);
355 int (*extract_input)(struct xfrm_state *x,
356 struct sk_buff *skb);
357 int (*extract_output)(struct xfrm_state *x,
358 struct sk_buff *skb);
359 int (*transport_finish)(struct sk_buff *skb,
361 void (*local_error)(struct sk_buff *skb, u32 mtu);
364 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
365 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
366 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
367 struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family);
369 struct xfrm_input_afinfo {
371 int (*callback)(struct sk_buff *skb, u8 protocol,
375 int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo);
376 int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo);
378 void xfrm_flush_gc(void);
379 void xfrm_state_delete_tunnel(struct xfrm_state *x);
383 struct module *owner;
386 #define XFRM_TYPE_NON_FRAGMENT 1
387 #define XFRM_TYPE_REPLAY_PROT 2
388 #define XFRM_TYPE_LOCAL_COADDR 4
389 #define XFRM_TYPE_REMOTE_COADDR 8
391 int (*init_state)(struct xfrm_state *x);
392 void (*destructor)(struct xfrm_state *);
393 int (*input)(struct xfrm_state *, struct sk_buff *skb);
394 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
395 int (*reject)(struct xfrm_state *, struct sk_buff *,
396 const struct flowi *);
397 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
398 /* Estimate maximal size of result of transformation of a dgram */
399 u32 (*get_mtu)(struct xfrm_state *, int size);
402 int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
403 int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
405 struct xfrm_type_offload {
407 struct module *owner;
409 void (*encap)(struct xfrm_state *, struct sk_buff *pskb);
410 int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb);
411 int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features);
414 int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family);
415 int xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family);
419 * Remove encapsulation header.
421 * The IP header will be moved over the top of the encapsulation
424 * On entry, the transport header shall point to where the IP header
425 * should be and the network header shall be set to where the IP
426 * header currently is. skb->data shall point to the start of the
429 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
432 * This is the actual input entry point.
434 * For transport mode and equivalent this would be identical to
435 * input2 (which does not need to be set). While tunnel mode
436 * and equivalent would set this to the tunnel encapsulation function
437 * xfrm4_prepare_input that would in turn call input2.
439 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
442 * Add encapsulation header.
444 * On exit, the transport header will be set to the start of the
445 * encapsulation header to be filled in by x->type->output and
446 * the mac header will be set to the nextheader (protocol for
447 * IPv4) field of the extension header directly preceding the
448 * encapsulation header, or in its absence, that of the top IP
449 * header. The value of the network header will always point
450 * to the top IP header while skb->data will point to the payload.
452 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
455 * This is the actual output entry point.
457 * For transport mode and equivalent this would be identical to
458 * output2 (which does not need to be set). While tunnel mode
459 * and equivalent would set this to a tunnel encapsulation function
460 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
463 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
466 * Adjust pointers into the packet and do GSO segmentation.
468 struct sk_buff *(*gso_segment)(struct xfrm_state *x, struct sk_buff *skb, netdev_features_t features);
471 * Adjust pointers into the packet when IPsec is done at layer2.
473 void (*xmit)(struct xfrm_state *x, struct sk_buff *skb);
475 struct xfrm_state_afinfo *afinfo;
476 struct module *owner;
481 /* Flags for xfrm_mode. */
483 XFRM_MODE_FLAG_TUNNEL = 1,
486 int xfrm_register_mode(struct xfrm_mode *mode, int family);
487 int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
489 static inline int xfrm_af2proto(unsigned int family)
501 static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
503 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
504 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
505 return x->inner_mode;
507 return x->inner_mode_iaf;
511 /* id in template is interpreted as:
512 * daddr - destination of tunnel, may be zero for transport mode.
513 * spi - zero to acquire spi. Not zero if spi is static, then
514 * daddr must be fixed too.
515 * proto - AH/ESP/IPCOMP
519 /* Source address of tunnel. Ignored, if it is not a tunnel. */
520 xfrm_address_t saddr;
522 unsigned short encap_family;
526 /* Mode: transport, tunnel etc. */
529 /* Sharing mode: unique, this session only, this user only etc. */
532 /* May skip this transfomration if no SA is found */
535 /* Skip aalgos/ealgos/calgos checks. */
538 /* Bit mask of algos allowed for acquisition */
544 #define XFRM_MAX_DEPTH 6
545 #define XFRM_MAX_OFFLOAD_DEPTH 1
547 struct xfrm_policy_walk_entry {
548 struct list_head all;
552 struct xfrm_policy_walk {
553 struct xfrm_policy_walk_entry walk;
558 struct xfrm_policy_queue {
559 struct sk_buff_head hold_queue;
560 struct timer_list hold_timer;
561 unsigned long timeout;
565 possible_net_t xp_net;
566 struct hlist_node bydst;
567 struct hlist_node byidx;
569 /* This lock only affects elements except for entry. */
572 struct timer_list timer;
577 struct xfrm_mark mark;
578 struct xfrm_selector selector;
579 struct xfrm_lifetime_cfg lft;
580 struct xfrm_lifetime_cur curlft;
581 struct xfrm_policy_walk_entry walk;
582 struct xfrm_policy_queue polq;
588 struct xfrm_sec_ctx *security;
589 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
593 static inline struct net *xp_net(const struct xfrm_policy *xp)
595 return read_pnet(&xp->xp_net);
598 struct xfrm_kmaddress {
599 xfrm_address_t local;
600 xfrm_address_t remote;
605 struct xfrm_migrate {
606 xfrm_address_t old_daddr;
607 xfrm_address_t old_saddr;
608 xfrm_address_t new_daddr;
609 xfrm_address_t new_saddr;
618 #define XFRM_KM_TIMEOUT 30
620 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
621 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
623 /* default aevent timeout in units of 100ms */
624 #define XFRM_AE_ETIME 10
625 /* Async Event timer multiplier */
626 #define XFRM_AE_ETH_M 10
627 /* default seq threshold size */
628 #define XFRM_AE_SEQT_SIZE 2
631 struct list_head list;
632 int (*notify)(struct xfrm_state *x, const struct km_event *c);
633 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
634 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
635 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
636 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
637 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
638 int (*migrate)(const struct xfrm_selector *sel,
640 const struct xfrm_migrate *m,
642 const struct xfrm_kmaddress *k,
643 const struct xfrm_encap_tmpl *encap);
644 bool (*is_alive)(const struct km_event *c);
647 int xfrm_register_km(struct xfrm_mgr *km);
648 int xfrm_unregister_km(struct xfrm_mgr *km);
650 struct xfrm_tunnel_skb_cb {
652 struct inet_skb_parm h4;
653 struct inet6_skb_parm h6;
657 struct ip_tunnel *ip4;
662 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
665 * This structure is used for the duration where packets are being
666 * transformed by IPsec. As soon as the packet leaves IPsec the
667 * area beyond the generic IP part may be overwritten.
670 struct xfrm_tunnel_skb_cb header;
672 /* Sequence number for replay protection. */
685 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
688 * This structure is used by the afinfo prepare_input/prepare_output functions
689 * to transmit header information to the mode input/output functions.
691 struct xfrm_mode_skb_cb {
692 struct xfrm_tunnel_skb_cb header;
694 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
698 /* IP header length (excluding options or extension headers). */
701 /* TOS for IPv4, class for IPv6. */
704 /* TTL for IPv4, hop limitfor IPv6. */
707 /* Protocol for IPv4, NH for IPv6. */
710 /* Option length for IPv4, zero for IPv6. */
713 /* Used by IPv6 only, zero for IPv4. */
717 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
720 * This structure is used by the input processing to locate the SPI and
721 * related information.
723 struct xfrm_spi_skb_cb {
724 struct xfrm_tunnel_skb_cb header;
726 unsigned int daddroff;
731 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
733 #ifdef CONFIG_AUDITSYSCALL
734 static inline struct audit_buffer *xfrm_audit_start(const char *op)
736 struct audit_buffer *audit_buf = NULL;
738 if (audit_enabled == 0)
740 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
741 AUDIT_MAC_IPSEC_EVENT);
742 if (audit_buf == NULL)
744 audit_log_format(audit_buf, "op=%s", op);
748 static inline void xfrm_audit_helper_usrinfo(bool task_valid,
749 struct audit_buffer *audit_buf)
751 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
752 audit_get_loginuid(current) :
754 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
757 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
758 audit_log_task_context(audit_buf);
761 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
762 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
764 void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
765 void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
766 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
767 struct sk_buff *skb);
768 void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
770 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
771 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
773 void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
777 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
782 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
787 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
792 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
797 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
802 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
803 struct sk_buff *skb, __be32 net_seq)
807 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
812 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
813 __be32 net_spi, __be32 net_seq)
817 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
818 struct sk_buff *skb, u8 proto)
821 #endif /* CONFIG_AUDITSYSCALL */
823 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
825 if (likely(policy != NULL))
826 refcount_inc(&policy->refcnt);
829 void xfrm_policy_destroy(struct xfrm_policy *policy);
831 static inline void xfrm_pol_put(struct xfrm_policy *policy)
833 if (refcount_dec_and_test(&policy->refcnt))
834 xfrm_policy_destroy(policy);
837 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
840 for (i = npols - 1; i >= 0; --i)
841 xfrm_pol_put(pols[i]);
844 void __xfrm_state_destroy(struct xfrm_state *);
846 static inline void __xfrm_state_put(struct xfrm_state *x)
848 refcount_dec(&x->refcnt);
851 static inline void xfrm_state_put(struct xfrm_state *x)
853 if (refcount_dec_and_test(&x->refcnt))
854 __xfrm_state_destroy(x);
857 static inline void xfrm_state_hold(struct xfrm_state *x)
859 refcount_inc(&x->refcnt);
862 static inline bool addr_match(const void *token1, const void *token2,
863 unsigned int prefixlen)
865 const __be32 *a1 = token1;
866 const __be32 *a2 = token2;
870 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
871 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
874 if (memcmp(a1, a2, pdw << 2))
880 mask = htonl((0xffffffff) << (32 - pbi));
882 if ((a1[pdw] ^ a2[pdw]) & mask)
889 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
891 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
892 if (sizeof(long) == 4 && prefixlen == 0)
894 return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen)));
898 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
901 switch(fl->flowi_proto) {
904 case IPPROTO_UDPLITE:
906 port = uli->ports.sport;
910 port = htons(uli->icmpt.type);
913 port = htons(uli->mht.type);
916 port = htons(ntohl(uli->gre_key) >> 16);
925 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
928 switch(fl->flowi_proto) {
931 case IPPROTO_UDPLITE:
933 port = uli->ports.dport;
937 port = htons(uli->icmpt.code);
940 port = htons(ntohl(uli->gre_key) & 0xffff);
948 bool xfrm_selector_match(const struct xfrm_selector *sel,
949 const struct flowi *fl, unsigned short family);
951 #ifdef CONFIG_SECURITY_NETWORK_XFRM
952 /* If neither has a context --> match
953 * Otherwise, both must have a context and the sids, doi, alg must match
955 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
957 return ((!s1 && !s2) ||
959 (s1->ctx_sid == s2->ctx_sid) &&
960 (s1->ctx_doi == s2->ctx_doi) &&
961 (s1->ctx_alg == s2->ctx_alg)));
964 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
970 /* A struct encoding bundle of transformations to apply to some set of flow.
972 * xdst->child points to the next element of bundle.
973 * dst->xfrm points to an instanse of transformer.
975 * Due to unfortunate limitations of current routing cache, which we
976 * have no time to fix, it mirrors struct rtable and bound to the same
977 * routing key, including saddr,daddr. However, we can have many of
978 * bundles differing by session id. All the bundles grow from a parent
983 struct dst_entry dst;
987 struct dst_entry *route;
988 struct dst_entry *child;
989 struct dst_entry *path;
990 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
991 int num_pols, num_xfrms;
994 u32 route_mtu_cached;
995 u32 child_mtu_cached;
1000 static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst)
1004 const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst;
1009 return (struct dst_entry *) dst;
1012 static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst)
1016 struct xfrm_dst *xdst = (struct xfrm_dst *) dst;
1024 static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child)
1026 xdst->child = child;
1029 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
1031 xfrm_pols_put(xdst->pols, xdst->num_pols);
1032 dst_release(xdst->route);
1033 if (likely(xdst->u.dst.xfrm))
1034 xfrm_state_put(xdst->u.dst.xfrm);
1038 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
1040 struct xfrm_offload {
1041 /* Output sequence number for replay protection on offloading. */
1048 #define SA_DELETE_REQ 1
1049 #define CRYPTO_DONE 2
1050 #define CRYPTO_NEXT_DONE 4
1051 #define CRYPTO_FALLBACK 8
1052 #define XFRM_GSO_SEGMENT 16
1054 #define XFRM_ESP_NO_TRAILER 64
1055 #define XFRM_DEV_RESUME 128
1058 #define CRYPTO_SUCCESS 1
1059 #define CRYPTO_GENERIC_ERROR 2
1060 #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
1061 #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
1062 #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
1063 #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
1064 #define CRYPTO_INVALID_PACKET_SYNTAX 64
1065 #define CRYPTO_INVALID_PROTOCOL 128
1075 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1076 struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
1079 static inline int secpath_exists(struct sk_buff *skb)
1082 return skb->sp != NULL;
1088 static inline struct sec_path *
1089 secpath_get(struct sec_path *sp)
1092 refcount_inc(&sp->refcnt);
1096 void __secpath_destroy(struct sec_path *sp);
1099 secpath_put(struct sec_path *sp)
1101 if (sp && refcount_dec_and_test(&sp->refcnt))
1102 __secpath_destroy(sp);
1105 struct sec_path *secpath_dup(struct sec_path *src);
1106 int secpath_set(struct sk_buff *skb);
1109 secpath_reset(struct sk_buff *skb)
1112 secpath_put(skb->sp);
1118 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1122 return addr->a4 == 0;
1124 return ipv6_addr_any(&addr->in6);
1130 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1132 return (tmpl->saddr.a4 &&
1133 tmpl->saddr.a4 != x->props.saddr.a4);
1137 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1139 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1140 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1144 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1148 return __xfrm4_state_addr_cmp(tmpl, x);
1150 return __xfrm6_state_addr_cmp(tmpl, x);
1156 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1157 unsigned short family);
1159 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1160 struct sk_buff *skb,
1161 unsigned int family, int reverse)
1163 struct net *net = dev_net(skb->dev);
1164 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1166 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1167 return __xfrm_policy_check(sk, ndir, skb, family);
1169 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
1170 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1171 __xfrm_policy_check(sk, ndir, skb, family);
1174 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1176 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1179 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1181 return xfrm_policy_check(sk, dir, skb, AF_INET);
1184 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1186 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1189 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1190 struct sk_buff *skb)
1192 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1195 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1196 struct sk_buff *skb)
1198 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1201 int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1202 unsigned int family, int reverse);
1204 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1205 unsigned int family)
1207 return __xfrm_decode_session(skb, fl, family, 0);
1210 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1212 unsigned int family)
1214 return __xfrm_decode_session(skb, fl, family, 1);
1217 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1219 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1221 struct net *net = dev_net(skb->dev);
1223 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1224 (skb_dst(skb)->flags & DST_NOXFRM) ||
1225 __xfrm_route_forward(skb, family);
1228 static inline int xfrm4_route_forward(struct sk_buff *skb)
1230 return xfrm_route_forward(skb, AF_INET);
1233 static inline int xfrm6_route_forward(struct sk_buff *skb)
1235 return xfrm_route_forward(skb, AF_INET6);
1238 int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1240 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1242 sk->sk_policy[0] = NULL;
1243 sk->sk_policy[1] = NULL;
1244 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1245 return __xfrm_sk_clone_policy(sk, osk);
1249 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1251 static inline void xfrm_sk_free_policy(struct sock *sk)
1253 struct xfrm_policy *pol;
1255 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1256 if (unlikely(pol != NULL)) {
1257 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1258 sk->sk_policy[0] = NULL;
1260 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1261 if (unlikely(pol != NULL)) {
1262 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1263 sk->sk_policy[1] = NULL;
1269 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1270 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1271 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1272 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1273 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1277 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1281 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1285 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1287 unsigned int family)
1291 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1292 struct sk_buff *skb)
1296 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1297 struct sk_buff *skb)
1304 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1308 return (xfrm_address_t *)&fl->u.ip4.daddr;
1310 return (xfrm_address_t *)&fl->u.ip6.daddr;
1316 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1320 return (xfrm_address_t *)&fl->u.ip4.saddr;
1322 return (xfrm_address_t *)&fl->u.ip6.saddr;
1328 void xfrm_flowi_addr_get(const struct flowi *fl,
1329 xfrm_address_t *saddr, xfrm_address_t *daddr,
1330 unsigned short family)
1334 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1335 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1338 saddr->in6 = fl->u.ip6.saddr;
1339 daddr->in6 = fl->u.ip6.daddr;
1344 static __inline__ int
1345 __xfrm4_state_addr_check(const struct xfrm_state *x,
1346 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1348 if (daddr->a4 == x->id.daddr.a4 &&
1349 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1354 static __inline__ int
1355 __xfrm6_state_addr_check(const struct xfrm_state *x,
1356 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1358 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1359 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1360 ipv6_addr_any((struct in6_addr *)saddr) ||
1361 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1366 static __inline__ int
1367 xfrm_state_addr_check(const struct xfrm_state *x,
1368 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1369 unsigned short family)
1373 return __xfrm4_state_addr_check(x, daddr, saddr);
1375 return __xfrm6_state_addr_check(x, daddr, saddr);
1380 static __inline__ int
1381 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1382 unsigned short family)
1386 return __xfrm4_state_addr_check(x,
1387 (const xfrm_address_t *)&fl->u.ip4.daddr,
1388 (const xfrm_address_t *)&fl->u.ip4.saddr);
1390 return __xfrm6_state_addr_check(x,
1391 (const xfrm_address_t *)&fl->u.ip6.daddr,
1392 (const xfrm_address_t *)&fl->u.ip6.saddr);
1397 static inline int xfrm_state_kern(const struct xfrm_state *x)
1399 return atomic_read(&x->tunnel_users);
1402 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1404 return (!userproto || proto == userproto ||
1405 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1406 proto == IPPROTO_ESP ||
1407 proto == IPPROTO_COMP)));
1411 * xfrm algorithm information
1413 struct xfrm_algo_aead_info {
1418 struct xfrm_algo_auth_info {
1423 struct xfrm_algo_encr_info {
1429 struct xfrm_algo_comp_info {
1433 struct xfrm_algo_desc {
1437 u8 pfkey_supported:1;
1439 struct xfrm_algo_aead_info aead;
1440 struct xfrm_algo_auth_info auth;
1441 struct xfrm_algo_encr_info encr;
1442 struct xfrm_algo_comp_info comp;
1444 struct sadb_alg desc;
1447 /* XFRM protocol handlers. */
1448 struct xfrm4_protocol {
1449 int (*handler)(struct sk_buff *skb);
1450 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1452 int (*cb_handler)(struct sk_buff *skb, int err);
1453 int (*err_handler)(struct sk_buff *skb, u32 info);
1455 struct xfrm4_protocol __rcu *next;
1459 struct xfrm6_protocol {
1460 int (*handler)(struct sk_buff *skb);
1461 int (*cb_handler)(struct sk_buff *skb, int err);
1462 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1463 u8 type, u8 code, int offset, __be32 info);
1465 struct xfrm6_protocol __rcu *next;
1469 /* XFRM tunnel handlers. */
1470 struct xfrm_tunnel {
1471 int (*handler)(struct sk_buff *skb);
1472 int (*err_handler)(struct sk_buff *skb, u32 info);
1474 struct xfrm_tunnel __rcu *next;
1478 struct xfrm6_tunnel {
1479 int (*handler)(struct sk_buff *skb);
1480 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1481 u8 type, u8 code, int offset, __be32 info);
1482 struct xfrm6_tunnel __rcu *next;
1486 void xfrm_init(void);
1487 void xfrm4_init(void);
1488 int xfrm_state_init(struct net *net);
1489 void xfrm_state_fini(struct net *net);
1490 void xfrm4_state_init(void);
1491 void xfrm4_protocol_init(void);
1493 int xfrm6_init(void);
1494 void xfrm6_fini(void);
1495 int xfrm6_state_init(void);
1496 void xfrm6_state_fini(void);
1497 int xfrm6_protocol_init(void);
1498 void xfrm6_protocol_fini(void);
1500 static inline int xfrm6_init(void)
1504 static inline void xfrm6_fini(void)
1510 #ifdef CONFIG_XFRM_STATISTICS
1511 int xfrm_proc_init(struct net *net);
1512 void xfrm_proc_fini(struct net *net);
1515 int xfrm_sysctl_init(struct net *net);
1516 #ifdef CONFIG_SYSCTL
1517 void xfrm_sysctl_fini(struct net *net);
1519 static inline void xfrm_sysctl_fini(struct net *net)
1524 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1525 struct xfrm_address_filter *filter);
1526 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1527 int (*func)(struct xfrm_state *, int, void*), void *);
1528 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1529 struct xfrm_state *xfrm_state_alloc(struct net *net);
1530 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1531 const xfrm_address_t *saddr,
1532 const struct flowi *fl,
1533 struct xfrm_tmpl *tmpl,
1534 struct xfrm_policy *pol, int *err,
1535 unsigned short family);
1536 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1537 xfrm_address_t *daddr,
1538 xfrm_address_t *saddr,
1539 unsigned short family,
1540 u8 mode, u8 proto, u32 reqid);
1541 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1542 unsigned short family);
1543 int xfrm_state_check_expire(struct xfrm_state *x);
1544 void xfrm_state_insert(struct xfrm_state *x);
1545 int xfrm_state_add(struct xfrm_state *x);
1546 int xfrm_state_update(struct xfrm_state *x);
1547 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1548 const xfrm_address_t *daddr, __be32 spi,
1549 u8 proto, unsigned short family);
1550 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1551 const xfrm_address_t *daddr,
1552 const xfrm_address_t *saddr,
1554 unsigned short family);
1555 #ifdef CONFIG_XFRM_SUB_POLICY
1556 int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1557 unsigned short family, struct net *net);
1558 int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1559 unsigned short family);
1561 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1562 int n, unsigned short family, struct net *net)
1567 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1568 int n, unsigned short family)
1574 struct xfrmk_sadinfo {
1575 u32 sadhcnt; /* current hash bkts */
1576 u32 sadhmcnt; /* max allowed hash bkts */
1577 u32 sadcnt; /* current running count */
1580 struct xfrmk_spdinfo {
1591 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1592 int xfrm_state_delete(struct xfrm_state *x);
1593 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid);
1594 int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
1595 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1596 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1597 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1598 int xfrm_init_replay(struct xfrm_state *x);
1599 int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1600 int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload);
1601 int xfrm_init_state(struct xfrm_state *x);
1602 int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1603 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1604 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1605 int xfrm_trans_queue(struct sk_buff *skb,
1606 int (*finish)(struct net *, struct sock *,
1608 int xfrm_output_resume(struct sk_buff *skb, int err);
1609 int xfrm_output(struct sock *sk, struct sk_buff *skb);
1610 int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1611 void xfrm_local_error(struct sk_buff *skb, int mtu);
1612 int xfrm4_extract_header(struct sk_buff *skb);
1613 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1614 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1616 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1617 int xfrm4_rcv(struct sk_buff *skb);
1618 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1620 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1622 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1623 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1624 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1625 return xfrm_input(skb, nexthdr, spi, 0);
1628 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1629 int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1630 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1631 int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1632 int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1633 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1634 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1635 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1636 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1637 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1638 int xfrm6_extract_header(struct sk_buff *skb);
1639 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1640 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1642 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1643 int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1644 int xfrm6_rcv(struct sk_buff *skb);
1645 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1646 xfrm_address_t *saddr, u8 proto);
1647 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1648 int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1649 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1650 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1651 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1652 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1653 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1654 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1655 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1656 int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1657 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1658 int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1659 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1663 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1664 int xfrm_user_policy(struct sock *sk, int optname,
1665 u8 __user *optval, int optlen);
1667 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1669 return -ENOPROTOOPT;
1672 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1674 /* should not happen */
1680 struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
1681 const xfrm_address_t *saddr,
1682 const xfrm_address_t *daddr,
1683 int family, u32 mark);
1685 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1687 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1688 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1689 int (*func)(struct xfrm_policy *, int, int, void*),
1691 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1692 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1693 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1695 struct xfrm_selector *sel,
1696 struct xfrm_sec_ctx *ctx, int delete,
1698 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir,
1699 u32 id, int delete, int *err);
1700 int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1701 void xfrm_policy_hash_rebuild(struct net *net);
1702 u32 xfrm_get_acqseq(void);
1703 int verify_spi_info(u8 proto, u32 min, u32 max);
1704 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1705 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1706 u8 mode, u32 reqid, u8 proto,
1707 const xfrm_address_t *daddr,
1708 const xfrm_address_t *saddr, int create,
1709 unsigned short family);
1710 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1712 #ifdef CONFIG_XFRM_MIGRATE
1713 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1714 const struct xfrm_migrate *m, int num_bundles,
1715 const struct xfrm_kmaddress *k,
1716 const struct xfrm_encap_tmpl *encap);
1717 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1718 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1719 struct xfrm_migrate *m,
1720 struct xfrm_encap_tmpl *encap);
1721 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1722 struct xfrm_migrate *m, int num_bundles,
1723 struct xfrm_kmaddress *k, struct net *net,
1724 struct xfrm_encap_tmpl *encap);
1727 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1728 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1729 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1730 xfrm_address_t *addr);
1732 void xfrm_input_init(void);
1733 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1735 void xfrm_probe_algs(void);
1736 int xfrm_count_pfkey_auth_supported(void);
1737 int xfrm_count_pfkey_enc_supported(void);
1738 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1739 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1740 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1741 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1742 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1743 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1744 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1745 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1746 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1749 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1750 const xfrm_address_t *b)
1752 return ipv6_addr_equal((const struct in6_addr *)a,
1753 (const struct in6_addr *)b);
1756 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1757 const xfrm_address_t *b,
1763 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1765 return xfrm6_addr_equal(a, b);
1769 static inline int xfrm_policy_id2dir(u32 index)
1775 static inline int xfrm_aevent_is_on(struct net *net)
1781 nlsk = rcu_dereference(net->xfrm.nlsk);
1783 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1788 static inline int xfrm_acquire_is_on(struct net *net)
1794 nlsk = rcu_dereference(net->xfrm.nlsk);
1796 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1803 static inline unsigned int aead_len(struct xfrm_algo_aead *alg)
1805 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1808 static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
1810 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1813 static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1815 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1818 static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1820 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1823 #ifdef CONFIG_XFRM_MIGRATE
1824 static inline int xfrm_replay_clone(struct xfrm_state *x,
1825 struct xfrm_state *orig)
1827 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1832 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1833 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1835 x->preplay_esn = kmemdup(x->replay_esn,
1836 xfrm_replay_state_esn_len(x->replay_esn),
1838 if (!x->preplay_esn) {
1839 kfree(x->replay_esn);
1846 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1848 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1852 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1854 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1857 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1859 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1862 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1865 for (i = 0; i < n; i++)
1866 xfrm_state_put(*(states + i));
1869 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1872 for (i = 0; i < n; i++)
1873 xfrm_state_delete(*(states + i));
1878 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1880 return skb->sp->xvec[skb->sp->len - 1];
1884 static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1887 struct sec_path *sp = skb->sp;
1889 if (!sp || !sp->olen || sp->len != sp->olen)
1892 return &sp->ovec[sp->olen - 1];
1898 void __init xfrm_dev_init(void);
1900 #ifdef CONFIG_XFRM_OFFLOAD
1901 void xfrm_dev_resume(struct sk_buff *skb);
1902 void xfrm_dev_backlog(struct softnet_data *sd);
1903 struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again);
1904 int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
1905 struct xfrm_user_offload *xuo);
1906 bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
1908 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1910 struct xfrm_state_offload *xso = &x->xso;
1912 if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn)
1913 xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x);
1916 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1918 struct xfrm_state *x = dst->xfrm;
1919 struct xfrm_dst *xdst;
1921 if (!x || !x->type_offload)
1924 xdst = (struct xfrm_dst *) dst;
1925 if (!x->xso.offload_handle && !xdst->child->xfrm)
1927 if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) &&
1934 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1936 struct xfrm_state_offload *xso = &x->xso;
1939 xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
1942 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1944 struct xfrm_state_offload *xso = &x->xso;
1945 struct net_device *dev = xso->dev;
1947 if (dev && dev->xfrmdev_ops) {
1948 if (dev->xfrmdev_ops->xdo_dev_state_free)
1949 dev->xfrmdev_ops->xdo_dev_state_free(x);
1955 static inline void xfrm_dev_resume(struct sk_buff *skb)
1959 static inline void xfrm_dev_backlog(struct softnet_data *sd)
1963 static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again)
1968 static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
1973 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1977 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1981 static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
1986 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1990 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1996 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1998 if (attrs[XFRMA_MARK])
1999 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
2006 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
2011 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
2015 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
2016 unsigned int family)
2018 bool tunnel = false;
2022 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
2026 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
2030 if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL))
2035 #endif /* _NET_XFRM_H */