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 * Add encapsulation header.
442 * On exit, the transport header will be set to the start of the
443 * encapsulation header to be filled in by x->type->output and
444 * the mac header will be set to the nextheader (protocol for
445 * IPv4) field of the extension header directly preceding the
446 * encapsulation header, or in its absence, that of the top IP
447 * header. The value of the network header will always point
448 * to the top IP header while skb->data will point to the payload.
450 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
453 * This is the actual output entry point.
455 * For transport mode and equivalent this would be identical to
456 * output2 (which does not need to be set). While tunnel mode
457 * and equivalent would set this to a tunnel encapsulation function
458 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
461 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
464 * Adjust pointers into the packet and do GSO segmentation.
466 struct sk_buff *(*gso_segment)(struct xfrm_state *x, struct sk_buff *skb, netdev_features_t features);
469 * Adjust pointers into the packet when IPsec is done at layer2.
471 void (*xmit)(struct xfrm_state *x, struct sk_buff *skb);
473 struct xfrm_state_afinfo *afinfo;
474 struct module *owner;
480 /* Flags for xfrm_mode. */
482 XFRM_MODE_FLAG_TUNNEL = 1,
485 int xfrm_register_mode(struct xfrm_mode *mode);
486 void xfrm_unregister_mode(struct xfrm_mode *mode);
488 static inline int xfrm_af2proto(unsigned int family)
500 static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
502 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
503 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
504 return x->inner_mode;
506 return x->inner_mode_iaf;
510 /* id in template is interpreted as:
511 * daddr - destination of tunnel, may be zero for transport mode.
512 * spi - zero to acquire spi. Not zero if spi is static, then
513 * daddr must be fixed too.
514 * proto - AH/ESP/IPCOMP
518 /* Source address of tunnel. Ignored, if it is not a tunnel. */
519 xfrm_address_t saddr;
521 unsigned short encap_family;
525 /* Mode: transport, tunnel etc. */
528 /* Sharing mode: unique, this session only, this user only etc. */
531 /* May skip this transfomration if no SA is found */
534 /* Skip aalgos/ealgos/calgos checks. */
537 /* Bit mask of algos allowed for acquisition */
543 #define XFRM_MAX_DEPTH 6
544 #define XFRM_MAX_OFFLOAD_DEPTH 1
546 struct xfrm_policy_walk_entry {
547 struct list_head all;
551 struct xfrm_policy_walk {
552 struct xfrm_policy_walk_entry walk;
557 struct xfrm_policy_queue {
558 struct sk_buff_head hold_queue;
559 struct timer_list hold_timer;
560 unsigned long timeout;
564 possible_net_t xp_net;
565 struct hlist_node bydst;
566 struct hlist_node byidx;
568 /* This lock only affects elements except for entry. */
572 struct timer_list timer;
578 struct xfrm_mark mark;
579 struct xfrm_selector selector;
580 struct xfrm_lifetime_cfg lft;
581 struct xfrm_lifetime_cur curlft;
582 struct xfrm_policy_walk_entry walk;
583 struct xfrm_policy_queue polq;
590 struct xfrm_sec_ctx *security;
591 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
592 struct hlist_node bydst_inexact_list;
596 static inline struct net *xp_net(const struct xfrm_policy *xp)
598 return read_pnet(&xp->xp_net);
601 struct xfrm_kmaddress {
602 xfrm_address_t local;
603 xfrm_address_t remote;
608 struct xfrm_migrate {
609 xfrm_address_t old_daddr;
610 xfrm_address_t old_saddr;
611 xfrm_address_t new_daddr;
612 xfrm_address_t new_saddr;
621 #define XFRM_KM_TIMEOUT 30
623 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
624 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
626 /* default aevent timeout in units of 100ms */
627 #define XFRM_AE_ETIME 10
628 /* Async Event timer multiplier */
629 #define XFRM_AE_ETH_M 10
630 /* default seq threshold size */
631 #define XFRM_AE_SEQT_SIZE 2
634 struct list_head list;
635 int (*notify)(struct xfrm_state *x, const struct km_event *c);
636 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
637 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
638 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
639 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
640 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
641 int (*migrate)(const struct xfrm_selector *sel,
643 const struct xfrm_migrate *m,
645 const struct xfrm_kmaddress *k,
646 const struct xfrm_encap_tmpl *encap);
647 bool (*is_alive)(const struct km_event *c);
650 int xfrm_register_km(struct xfrm_mgr *km);
651 int xfrm_unregister_km(struct xfrm_mgr *km);
653 struct xfrm_tunnel_skb_cb {
655 struct inet_skb_parm h4;
656 struct inet6_skb_parm h6;
660 struct ip_tunnel *ip4;
665 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
668 * This structure is used for the duration where packets are being
669 * transformed by IPsec. As soon as the packet leaves IPsec the
670 * area beyond the generic IP part may be overwritten.
673 struct xfrm_tunnel_skb_cb header;
675 /* Sequence number for replay protection. */
688 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
691 * This structure is used by the afinfo prepare_input/prepare_output functions
692 * to transmit header information to the mode input/output functions.
694 struct xfrm_mode_skb_cb {
695 struct xfrm_tunnel_skb_cb header;
697 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
701 /* IP header length (excluding options or extension headers). */
704 /* TOS for IPv4, class for IPv6. */
707 /* TTL for IPv4, hop limitfor IPv6. */
710 /* Protocol for IPv4, NH for IPv6. */
713 /* Option length for IPv4, zero for IPv6. */
716 /* Used by IPv6 only, zero for IPv4. */
720 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
723 * This structure is used by the input processing to locate the SPI and
724 * related information.
726 struct xfrm_spi_skb_cb {
727 struct xfrm_tunnel_skb_cb header;
729 unsigned int daddroff;
734 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
736 #ifdef CONFIG_AUDITSYSCALL
737 static inline struct audit_buffer *xfrm_audit_start(const char *op)
739 struct audit_buffer *audit_buf = NULL;
741 if (audit_enabled == AUDIT_OFF)
743 audit_buf = audit_log_start(audit_context(), GFP_ATOMIC,
744 AUDIT_MAC_IPSEC_EVENT);
745 if (audit_buf == NULL)
747 audit_log_format(audit_buf, "op=%s", op);
751 static inline void xfrm_audit_helper_usrinfo(bool task_valid,
752 struct audit_buffer *audit_buf)
754 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
755 audit_get_loginuid(current) :
757 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
760 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
761 audit_log_task_context(audit_buf);
764 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
765 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
767 void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
768 void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
769 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
770 struct sk_buff *skb);
771 void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
773 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
774 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
776 void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
780 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
785 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
790 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
795 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
800 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
805 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
806 struct sk_buff *skb, __be32 net_seq)
810 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
815 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
816 __be32 net_spi, __be32 net_seq)
820 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
821 struct sk_buff *skb, u8 proto)
824 #endif /* CONFIG_AUDITSYSCALL */
826 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
828 if (likely(policy != NULL))
829 refcount_inc(&policy->refcnt);
832 void xfrm_policy_destroy(struct xfrm_policy *policy);
834 static inline void xfrm_pol_put(struct xfrm_policy *policy)
836 if (refcount_dec_and_test(&policy->refcnt))
837 xfrm_policy_destroy(policy);
840 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
843 for (i = npols - 1; i >= 0; --i)
844 xfrm_pol_put(pols[i]);
847 void __xfrm_state_destroy(struct xfrm_state *, bool);
849 static inline void __xfrm_state_put(struct xfrm_state *x)
851 refcount_dec(&x->refcnt);
854 static inline void xfrm_state_put(struct xfrm_state *x)
856 if (refcount_dec_and_test(&x->refcnt))
857 __xfrm_state_destroy(x, false);
860 static inline void xfrm_state_put_sync(struct xfrm_state *x)
862 if (refcount_dec_and_test(&x->refcnt))
863 __xfrm_state_destroy(x, true);
866 static inline void xfrm_state_hold(struct xfrm_state *x)
868 refcount_inc(&x->refcnt);
871 static inline bool addr_match(const void *token1, const void *token2,
872 unsigned int prefixlen)
874 const __be32 *a1 = token1;
875 const __be32 *a2 = token2;
879 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
880 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
883 if (memcmp(a1, a2, pdw << 2))
889 mask = htonl((0xffffffff) << (32 - pbi));
891 if ((a1[pdw] ^ a2[pdw]) & mask)
898 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
900 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
901 if (sizeof(long) == 4 && prefixlen == 0)
903 return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen)));
907 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
910 switch(fl->flowi_proto) {
913 case IPPROTO_UDPLITE:
915 port = uli->ports.sport;
919 port = htons(uli->icmpt.type);
922 port = htons(uli->mht.type);
925 port = htons(ntohl(uli->gre_key) >> 16);
934 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
937 switch(fl->flowi_proto) {
940 case IPPROTO_UDPLITE:
942 port = uli->ports.dport;
946 port = htons(uli->icmpt.code);
949 port = htons(ntohl(uli->gre_key) & 0xffff);
957 bool xfrm_selector_match(const struct xfrm_selector *sel,
958 const struct flowi *fl, unsigned short family);
960 #ifdef CONFIG_SECURITY_NETWORK_XFRM
961 /* If neither has a context --> match
962 * Otherwise, both must have a context and the sids, doi, alg must match
964 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
966 return ((!s1 && !s2) ||
968 (s1->ctx_sid == s2->ctx_sid) &&
969 (s1->ctx_doi == s2->ctx_doi) &&
970 (s1->ctx_alg == s2->ctx_alg)));
973 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
979 /* A struct encoding bundle of transformations to apply to some set of flow.
981 * xdst->child points to the next element of bundle.
982 * dst->xfrm points to an instanse of transformer.
984 * Due to unfortunate limitations of current routing cache, which we
985 * have no time to fix, it mirrors struct rtable and bound to the same
986 * routing key, including saddr,daddr. However, we can have many of
987 * bundles differing by session id. All the bundles grow from a parent
992 struct dst_entry dst;
996 struct dst_entry *route;
997 struct dst_entry *child;
998 struct dst_entry *path;
999 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
1000 int num_pols, num_xfrms;
1003 u32 route_mtu_cached;
1004 u32 child_mtu_cached;
1009 static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst)
1013 const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst;
1018 return (struct dst_entry *) dst;
1021 static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst)
1025 struct xfrm_dst *xdst = (struct xfrm_dst *) dst;
1033 static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child)
1035 xdst->child = child;
1038 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
1040 xfrm_pols_put(xdst->pols, xdst->num_pols);
1041 dst_release(xdst->route);
1042 if (likely(xdst->u.dst.xfrm))
1043 xfrm_state_put(xdst->u.dst.xfrm);
1047 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
1049 struct xfrm_if_parms {
1050 char name[IFNAMSIZ]; /* name of XFRM device */
1051 int link; /* ifindex of underlying L2 interface */
1052 u32 if_id; /* interface identifyer */
1056 struct xfrm_if __rcu *next; /* next interface in list */
1057 struct net_device *dev; /* virtual device associated with interface */
1058 struct net_device *phydev; /* physical device */
1059 struct net *net; /* netns for packet i/o */
1060 struct xfrm_if_parms p; /* interface parms */
1062 struct gro_cells gro_cells;
1065 struct xfrm_offload {
1066 /* Output sequence number for replay protection on offloading. */
1073 #define SA_DELETE_REQ 1
1074 #define CRYPTO_DONE 2
1075 #define CRYPTO_NEXT_DONE 4
1076 #define CRYPTO_FALLBACK 8
1077 #define XFRM_GSO_SEGMENT 16
1079 #define XFRM_ESP_NO_TRAILER 64
1080 #define XFRM_DEV_RESUME 128
1083 #define CRYPTO_SUCCESS 1
1084 #define CRYPTO_GENERIC_ERROR 2
1085 #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
1086 #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
1087 #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
1088 #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
1089 #define CRYPTO_INVALID_PACKET_SYNTAX 64
1090 #define CRYPTO_INVALID_PROTOCOL 128
1099 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1100 struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
1103 struct sec_path *secpath_set(struct sk_buff *skb);
1106 secpath_reset(struct sk_buff *skb)
1109 skb_ext_del(skb, SKB_EXT_SEC_PATH);
1114 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1118 return addr->a4 == 0;
1120 return ipv6_addr_any(&addr->in6);
1126 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1128 return (tmpl->saddr.a4 &&
1129 tmpl->saddr.a4 != x->props.saddr.a4);
1133 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1135 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1136 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1140 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1144 return __xfrm4_state_addr_cmp(tmpl, x);
1146 return __xfrm6_state_addr_cmp(tmpl, x);
1152 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1153 unsigned short family);
1155 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1156 struct sk_buff *skb,
1157 unsigned int family, int reverse)
1159 struct net *net = dev_net(skb->dev);
1160 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1162 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1163 return __xfrm_policy_check(sk, ndir, skb, family);
1165 return (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) ||
1166 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1167 __xfrm_policy_check(sk, ndir, skb, family);
1170 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1172 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1175 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1177 return xfrm_policy_check(sk, dir, skb, AF_INET);
1180 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1182 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1185 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1186 struct sk_buff *skb)
1188 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1191 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1192 struct sk_buff *skb)
1194 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1197 int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1198 unsigned int family, int reverse);
1200 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1201 unsigned int family)
1203 return __xfrm_decode_session(skb, fl, family, 0);
1206 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1208 unsigned int family)
1210 return __xfrm_decode_session(skb, fl, family, 1);
1213 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1215 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1217 struct net *net = dev_net(skb->dev);
1219 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1220 (skb_dst(skb)->flags & DST_NOXFRM) ||
1221 __xfrm_route_forward(skb, family);
1224 static inline int xfrm4_route_forward(struct sk_buff *skb)
1226 return xfrm_route_forward(skb, AF_INET);
1229 static inline int xfrm6_route_forward(struct sk_buff *skb)
1231 return xfrm_route_forward(skb, AF_INET6);
1234 int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1236 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1238 sk->sk_policy[0] = NULL;
1239 sk->sk_policy[1] = NULL;
1240 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1241 return __xfrm_sk_clone_policy(sk, osk);
1245 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1247 static inline void xfrm_sk_free_policy(struct sock *sk)
1249 struct xfrm_policy *pol;
1251 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1252 if (unlikely(pol != NULL)) {
1253 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1254 sk->sk_policy[0] = NULL;
1256 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1257 if (unlikely(pol != NULL)) {
1258 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1259 sk->sk_policy[1] = NULL;
1265 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1266 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1267 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1268 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1269 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1273 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1277 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1281 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1283 unsigned int family)
1287 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1288 struct sk_buff *skb)
1292 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1293 struct sk_buff *skb)
1300 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1304 return (xfrm_address_t *)&fl->u.ip4.daddr;
1306 return (xfrm_address_t *)&fl->u.ip6.daddr;
1312 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1316 return (xfrm_address_t *)&fl->u.ip4.saddr;
1318 return (xfrm_address_t *)&fl->u.ip6.saddr;
1324 void xfrm_flowi_addr_get(const struct flowi *fl,
1325 xfrm_address_t *saddr, xfrm_address_t *daddr,
1326 unsigned short family)
1330 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1331 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1334 saddr->in6 = fl->u.ip6.saddr;
1335 daddr->in6 = fl->u.ip6.daddr;
1340 static __inline__ int
1341 __xfrm4_state_addr_check(const struct xfrm_state *x,
1342 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1344 if (daddr->a4 == x->id.daddr.a4 &&
1345 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1350 static __inline__ int
1351 __xfrm6_state_addr_check(const struct xfrm_state *x,
1352 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1354 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1355 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1356 ipv6_addr_any((struct in6_addr *)saddr) ||
1357 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1362 static __inline__ int
1363 xfrm_state_addr_check(const struct xfrm_state *x,
1364 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1365 unsigned short family)
1369 return __xfrm4_state_addr_check(x, daddr, saddr);
1371 return __xfrm6_state_addr_check(x, daddr, saddr);
1376 static __inline__ int
1377 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1378 unsigned short family)
1382 return __xfrm4_state_addr_check(x,
1383 (const xfrm_address_t *)&fl->u.ip4.daddr,
1384 (const xfrm_address_t *)&fl->u.ip4.saddr);
1386 return __xfrm6_state_addr_check(x,
1387 (const xfrm_address_t *)&fl->u.ip6.daddr,
1388 (const xfrm_address_t *)&fl->u.ip6.saddr);
1393 static inline int xfrm_state_kern(const struct xfrm_state *x)
1395 return atomic_read(&x->tunnel_users);
1398 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1400 return (!userproto || proto == userproto ||
1401 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1402 proto == IPPROTO_ESP ||
1403 proto == IPPROTO_COMP)));
1407 * xfrm algorithm information
1409 struct xfrm_algo_aead_info {
1414 struct xfrm_algo_auth_info {
1419 struct xfrm_algo_encr_info {
1425 struct xfrm_algo_comp_info {
1429 struct xfrm_algo_desc {
1433 u8 pfkey_supported:1;
1435 struct xfrm_algo_aead_info aead;
1436 struct xfrm_algo_auth_info auth;
1437 struct xfrm_algo_encr_info encr;
1438 struct xfrm_algo_comp_info comp;
1440 struct sadb_alg desc;
1443 /* XFRM protocol handlers. */
1444 struct xfrm4_protocol {
1445 int (*handler)(struct sk_buff *skb);
1446 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1448 int (*cb_handler)(struct sk_buff *skb, int err);
1449 int (*err_handler)(struct sk_buff *skb, u32 info);
1451 struct xfrm4_protocol __rcu *next;
1455 struct xfrm6_protocol {
1456 int (*handler)(struct sk_buff *skb);
1457 int (*cb_handler)(struct sk_buff *skb, int err);
1458 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1459 u8 type, u8 code, int offset, __be32 info);
1461 struct xfrm6_protocol __rcu *next;
1465 /* XFRM tunnel handlers. */
1466 struct xfrm_tunnel {
1467 int (*handler)(struct sk_buff *skb);
1468 int (*err_handler)(struct sk_buff *skb, u32 info);
1470 struct xfrm_tunnel __rcu *next;
1474 struct xfrm6_tunnel {
1475 int (*handler)(struct sk_buff *skb);
1476 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1477 u8 type, u8 code, int offset, __be32 info);
1478 struct xfrm6_tunnel __rcu *next;
1482 void xfrm_init(void);
1483 void xfrm4_init(void);
1484 int xfrm_state_init(struct net *net);
1485 void xfrm_state_fini(struct net *net);
1486 void xfrm4_state_init(void);
1487 void xfrm4_protocol_init(void);
1489 int xfrm6_init(void);
1490 void xfrm6_fini(void);
1491 int xfrm6_state_init(void);
1492 void xfrm6_state_fini(void);
1493 int xfrm6_protocol_init(void);
1494 void xfrm6_protocol_fini(void);
1496 static inline int xfrm6_init(void)
1500 static inline void xfrm6_fini(void)
1506 #ifdef CONFIG_XFRM_STATISTICS
1507 int xfrm_proc_init(struct net *net);
1508 void xfrm_proc_fini(struct net *net);
1511 int xfrm_sysctl_init(struct net *net);
1512 #ifdef CONFIG_SYSCTL
1513 void xfrm_sysctl_fini(struct net *net);
1515 static inline void xfrm_sysctl_fini(struct net *net)
1520 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1521 struct xfrm_address_filter *filter);
1522 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1523 int (*func)(struct xfrm_state *, int, void*), void *);
1524 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1525 struct xfrm_state *xfrm_state_alloc(struct net *net);
1526 void xfrm_state_free(struct xfrm_state *x);
1527 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1528 const xfrm_address_t *saddr,
1529 const struct flowi *fl,
1530 struct xfrm_tmpl *tmpl,
1531 struct xfrm_policy *pol, int *err,
1532 unsigned short family, u32 if_id);
1533 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
1534 xfrm_address_t *daddr,
1535 xfrm_address_t *saddr,
1536 unsigned short family,
1537 u8 mode, u8 proto, u32 reqid);
1538 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1539 unsigned short family);
1540 int xfrm_state_check_expire(struct xfrm_state *x);
1541 void xfrm_state_insert(struct xfrm_state *x);
1542 int xfrm_state_add(struct xfrm_state *x);
1543 int xfrm_state_update(struct xfrm_state *x);
1544 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1545 const xfrm_address_t *daddr, __be32 spi,
1546 u8 proto, unsigned short family);
1547 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1548 const xfrm_address_t *daddr,
1549 const xfrm_address_t *saddr,
1551 unsigned short family);
1552 #ifdef CONFIG_XFRM_SUB_POLICY
1553 int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1554 unsigned short family, struct net *net);
1555 int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1556 unsigned short family);
1558 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1559 int n, unsigned short family, struct net *net)
1564 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1565 int n, unsigned short family)
1571 struct xfrmk_sadinfo {
1572 u32 sadhcnt; /* current hash bkts */
1573 u32 sadhmcnt; /* max allowed hash bkts */
1574 u32 sadcnt; /* current running count */
1577 struct xfrmk_spdinfo {
1588 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1589 int xfrm_state_delete(struct xfrm_state *x);
1590 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync);
1591 int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
1592 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1593 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1594 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1595 int xfrm_init_replay(struct xfrm_state *x);
1596 int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1597 int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload);
1598 int xfrm_init_state(struct xfrm_state *x);
1599 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1600 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1601 int xfrm_trans_queue(struct sk_buff *skb,
1602 int (*finish)(struct net *, struct sock *,
1604 int xfrm_output_resume(struct sk_buff *skb, int err);
1605 int xfrm_output(struct sock *sk, struct sk_buff *skb);
1606 int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1607 void xfrm_local_error(struct sk_buff *skb, int mtu);
1608 int xfrm4_extract_header(struct sk_buff *skb);
1609 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1610 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1612 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1613 int xfrm4_rcv(struct sk_buff *skb);
1614 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1616 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1618 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1619 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1620 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1621 return xfrm_input(skb, nexthdr, spi, 0);
1624 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1625 int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1626 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1627 int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1628 int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1629 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1630 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1631 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1632 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1633 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1634 int xfrm6_extract_header(struct sk_buff *skb);
1635 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1636 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1638 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1639 int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1640 int xfrm6_rcv(struct sk_buff *skb);
1641 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1642 xfrm_address_t *saddr, u8 proto);
1643 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1644 int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1645 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1646 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1647 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1648 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1649 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1650 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1651 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1652 int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1653 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1654 int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1655 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1659 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1660 int xfrm_user_policy(struct sock *sk, int optname,
1661 u8 __user *optval, int optlen);
1663 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1665 return -ENOPROTOOPT;
1668 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1670 /* should not happen */
1676 struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
1677 const xfrm_address_t *saddr,
1678 const xfrm_address_t *daddr,
1679 int family, u32 mark);
1681 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1683 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1684 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1685 int (*func)(struct xfrm_policy *, int, int, void*),
1687 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1688 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1689 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, u32 if_id,
1691 struct xfrm_selector *sel,
1692 struct xfrm_sec_ctx *ctx, int delete,
1694 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u32 if_id, u8,
1695 int dir, u32 id, int delete, int *err);
1696 int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1697 void xfrm_policy_hash_rebuild(struct net *net);
1698 u32 xfrm_get_acqseq(void);
1699 int verify_spi_info(u8 proto, u32 min, u32 max);
1700 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1701 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1702 u8 mode, u32 reqid, u32 if_id, u8 proto,
1703 const xfrm_address_t *daddr,
1704 const xfrm_address_t *saddr, int create,
1705 unsigned short family);
1706 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1708 #ifdef CONFIG_XFRM_MIGRATE
1709 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1710 const struct xfrm_migrate *m, int num_bundles,
1711 const struct xfrm_kmaddress *k,
1712 const struct xfrm_encap_tmpl *encap);
1713 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1714 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1715 struct xfrm_migrate *m,
1716 struct xfrm_encap_tmpl *encap);
1717 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1718 struct xfrm_migrate *m, int num_bundles,
1719 struct xfrm_kmaddress *k, struct net *net,
1720 struct xfrm_encap_tmpl *encap);
1723 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1724 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1725 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1726 xfrm_address_t *addr);
1728 void xfrm_input_init(void);
1729 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1731 void xfrm_probe_algs(void);
1732 int xfrm_count_pfkey_auth_supported(void);
1733 int xfrm_count_pfkey_enc_supported(void);
1734 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1735 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1736 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1737 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1738 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1739 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1740 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1741 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1742 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1745 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1746 const xfrm_address_t *b)
1748 return ipv6_addr_equal((const struct in6_addr *)a,
1749 (const struct in6_addr *)b);
1752 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1753 const xfrm_address_t *b,
1759 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1761 return xfrm6_addr_equal(a, b);
1765 static inline int xfrm_policy_id2dir(u32 index)
1771 static inline int xfrm_aevent_is_on(struct net *net)
1777 nlsk = rcu_dereference(net->xfrm.nlsk);
1779 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1784 static inline int xfrm_acquire_is_on(struct net *net)
1790 nlsk = rcu_dereference(net->xfrm.nlsk);
1792 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1799 static inline unsigned int aead_len(struct xfrm_algo_aead *alg)
1801 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1804 static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
1806 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1809 static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1811 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1814 static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1816 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1819 #ifdef CONFIG_XFRM_MIGRATE
1820 static inline int xfrm_replay_clone(struct xfrm_state *x,
1821 struct xfrm_state *orig)
1823 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1828 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1829 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1831 x->preplay_esn = kmemdup(x->replay_esn,
1832 xfrm_replay_state_esn_len(x->replay_esn),
1834 if (!x->preplay_esn) {
1835 kfree(x->replay_esn);
1842 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1844 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1848 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1850 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1853 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1855 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1858 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1861 for (i = 0; i < n; i++)
1862 xfrm_state_put(*(states + i));
1865 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1868 for (i = 0; i < n; i++)
1869 xfrm_state_delete(*(states + i));
1874 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1876 struct sec_path *sp = skb_sec_path(skb);
1878 return sp->xvec[sp->len - 1];
1882 static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1885 struct sec_path *sp = skb_sec_path(skb);
1887 if (!sp || !sp->olen || sp->len != sp->olen)
1890 return &sp->ovec[sp->olen - 1];
1896 void __init xfrm_dev_init(void);
1898 #ifdef CONFIG_XFRM_OFFLOAD
1899 void xfrm_dev_resume(struct sk_buff *skb);
1900 void xfrm_dev_backlog(struct softnet_data *sd);
1901 struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again);
1902 int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
1903 struct xfrm_user_offload *xuo);
1904 bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
1906 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1908 struct xfrm_state_offload *xso = &x->xso;
1910 if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn)
1911 xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x);
1914 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1916 struct xfrm_state *x = dst->xfrm;
1917 struct xfrm_dst *xdst;
1919 if (!x || !x->type_offload)
1922 xdst = (struct xfrm_dst *) dst;
1923 if (!x->xso.offload_handle && !xdst->child->xfrm)
1925 if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) &&
1932 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1934 struct xfrm_state_offload *xso = &x->xso;
1937 xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
1940 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1942 struct xfrm_state_offload *xso = &x->xso;
1943 struct net_device *dev = xso->dev;
1945 if (dev && dev->xfrmdev_ops) {
1946 if (dev->xfrmdev_ops->xdo_dev_state_free)
1947 dev->xfrmdev_ops->xdo_dev_state_free(x);
1953 static inline void xfrm_dev_resume(struct sk_buff *skb)
1957 static inline void xfrm_dev_backlog(struct softnet_data *sd)
1961 static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again)
1966 static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
1971 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1975 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1979 static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
1984 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1988 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1994 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1996 if (attrs[XFRMA_MARK])
1997 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
2004 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
2009 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
2013 static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x)
2015 struct xfrm_mark *m = &x->props.smark;
2017 return (m->v & m->m) | (mark & ~m->m);
2020 static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id)
2025 ret = nla_put_u32(skb, XFRMA_IF_ID, if_id);
2029 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
2030 unsigned int family)
2032 bool tunnel = false;
2036 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
2040 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
2044 if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL))
2049 #endif /* _NET_XFRM_H */