11da177e4SLinus Torvalds #ifndef _NET_XFRM_H 21da177e4SLinus Torvalds #define _NET_XFRM_H 31da177e4SLinus Torvalds 4aabc9761SHerbert Xu #include <linux/compiler.h> 51da177e4SLinus Torvalds #include <linux/xfrm.h> 61da177e4SLinus Torvalds #include <linux/spinlock.h> 71da177e4SLinus Torvalds #include <linux/list.h> 81da177e4SLinus Torvalds #include <linux/skbuff.h> 914c85021SArnaldo Carvalho de Melo #include <linux/socket.h> 101da177e4SLinus Torvalds #include <linux/pfkeyv2.h> 115794708fSMasahide NAKAMURA #include <linux/ipsec.h> 121da177e4SLinus Torvalds #include <linux/in6.h> 134a3e2f71SArjan van de Ven #include <linux/mutex.h> 14ab5f5e8bSJoy Latten #include <linux/audit.h> 155a0e3ad6STejun Heo #include <linux/slab.h> 161da177e4SLinus Torvalds 171da177e4SLinus Torvalds #include <net/sock.h> 181da177e4SLinus Torvalds #include <net/dst.h> 19436a0a40SHerbert Xu #include <net/ip.h> 201da177e4SLinus Torvalds #include <net/route.h> 211da177e4SLinus Torvalds #include <net/ipv6.h> 221da177e4SLinus Torvalds #include <net/ip6_fib.h> 23fe1a5f03STimo Teräs #include <net/flow.h> 249e0d57fdSYury Polyanskiy 259e0d57fdSYury Polyanskiy #include <linux/interrupt.h> 269e0d57fdSYury Polyanskiy 27558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 28558f82efSMasahide NAKAMURA #include <net/snmp.h> 29558f82efSMasahide NAKAMURA #endif 301da177e4SLinus Torvalds 31d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ESP 50 32d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_AH 51 33d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_COMP 108 34d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPIP 4 35d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPV6 41 36d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ROUTING IPPROTO_ROUTING 37d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS 38d3d6dd3aSMasahide NAKAMURA 39fa9921e4SNicolas Dichtel #define XFRM_ALIGN4(len) (((len) + 3) & ~3) 401da177e4SLinus Torvalds #define XFRM_ALIGN8(len) (((len) + 7) & ~7) 41b59f45d0SHerbert Xu #define MODULE_ALIAS_XFRM_MODE(family, encap) \ 42b59f45d0SHerbert Xu MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) 43d3d6dd3aSMasahide NAKAMURA #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ 44d3d6dd3aSMasahide NAKAMURA MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) 451da177e4SLinus Torvalds 46558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 4759c9940eSAlexey Dobriyan #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) 4859c9940eSAlexey Dobriyan #define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field) 4959c9940eSAlexey Dobriyan #define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field) 50558f82efSMasahide NAKAMURA #else 5159c9940eSAlexey Dobriyan #define XFRM_INC_STATS(net, field) ((void)(net)) 5259c9940eSAlexey Dobriyan #define XFRM_INC_STATS_BH(net, field) ((void)(net)) 5359c9940eSAlexey Dobriyan #define XFRM_INC_STATS_USER(net, field) ((void)(net)) 54558f82efSMasahide NAKAMURA #endif 55558f82efSMasahide NAKAMURA 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds /* Organization of SPD aka "XFRM rules" 581da177e4SLinus Torvalds ------------------------------------ 591da177e4SLinus Torvalds 601da177e4SLinus Torvalds Basic objects: 611da177e4SLinus Torvalds - policy rule, struct xfrm_policy (=SPD entry) 621da177e4SLinus Torvalds - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) 631da177e4SLinus Torvalds - instance of a transformer, struct xfrm_state (=SA) 641da177e4SLinus Torvalds - template to clone xfrm_state, struct xfrm_tmpl 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds SPD is plain linear list of xfrm_policy rules, ordered by priority. 671da177e4SLinus Torvalds (To be compatible with existing pfkeyv2 implementations, 681da177e4SLinus Torvalds many rules with priority of 0x7fffffff are allowed to exist and 691da177e4SLinus Torvalds such rules are ordered in an unpredictable way, thanks to bsd folks.) 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds Lookup is plain linear search until the first match with selector. 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds If "action" is "block", then we prohibit the flow, otherwise: 741da177e4SLinus Torvalds if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, 751da177e4SLinus Torvalds policy entry has list of up to XFRM_MAX_DEPTH transformations, 761da177e4SLinus Torvalds described by templates xfrm_tmpl. Each template is resolved 771da177e4SLinus Torvalds to a complete xfrm_state (see below) and we pack bundle of transformations 781da177e4SLinus Torvalds to a dst_entry returned to requestor. 791da177e4SLinus Torvalds 801da177e4SLinus Torvalds dst -. xfrm .-> xfrm_state #1 811da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #2 821da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #3 831da177e4SLinus Torvalds |---. child .-> NULL 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds Bundles are cached at xrfm_policy struct (field ->bundles). 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds Resolution of xrfm_tmpl 891da177e4SLinus Torvalds ----------------------- 901da177e4SLinus Torvalds Template contains: 911da177e4SLinus Torvalds 1. ->mode Mode: transport or tunnel 921da177e4SLinus Torvalds 2. ->id.proto Protocol: AH/ESP/IPCOMP 931da177e4SLinus Torvalds 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. 941da177e4SLinus Torvalds Q: allow to resolve security gateway? 951da177e4SLinus Torvalds 4. ->id.spi If not zero, static SPI. 961da177e4SLinus Torvalds 5. ->saddr Local tunnel endpoint, ignored for transport mode. 971da177e4SLinus Torvalds 6. ->algos List of allowed algos. Plain bitmask now. 981da177e4SLinus Torvalds Q: ealgos, aalgos, calgos. What a mess... 991da177e4SLinus Torvalds 7. ->share Sharing mode. 1001da177e4SLinus Torvalds Q: how to implement private sharing mode? To add struct sock* to 1011da177e4SLinus Torvalds flow id? 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds Having this template we search through SAD searching for entries 1041da177e4SLinus Torvalds with appropriate mode/proto/algo, permitted by selector. 1051da177e4SLinus Torvalds If no appropriate entry found, it is requested from key manager. 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds PROBLEMS: 1081da177e4SLinus Torvalds Q: How to find all the bundles referring to a physical path for 1091da177e4SLinus Torvalds PMTU discovery? Seems, dst should contain list of all parents... 1101da177e4SLinus Torvalds and enter to infinite locking hierarchy disaster. 1111da177e4SLinus Torvalds No! It is easier, we will not search for them, let them find us. 1121da177e4SLinus Torvalds We add genid to each dst plus pointer to genid of raw IP route, 1131da177e4SLinus Torvalds pmtu disc will update pmtu on raw IP route and increase its genid. 1141da177e4SLinus Torvalds dst_check() will see this for top level and trigger resyncing 1151da177e4SLinus Torvalds metrics. Plus, it will be made via sk->sk_dst_cache. Solved. 1161da177e4SLinus Torvalds */ 1171da177e4SLinus Torvalds 11812a169e7SHerbert Xu struct xfrm_state_walk { 11912a169e7SHerbert Xu struct list_head all; 12012a169e7SHerbert Xu u8 state; 12112a169e7SHerbert Xu u8 dying; 12212a169e7SHerbert Xu u8 proto; 12312a169e7SHerbert Xu u32 seq; 124870a2df4SNicolas Dichtel struct xfrm_address_filter *filter; 12512a169e7SHerbert Xu }; 12612a169e7SHerbert Xu 1271da177e4SLinus Torvalds /* Full description of state of transformer. */ 128fd2c3ef7SEric Dumazet struct xfrm_state { 1290c5c9fb5SEric W. Biederman possible_net_t xs_net; 130abb81c4fSHerbert Xu union { 13112a169e7SHerbert Xu struct hlist_node gclist; 1328f126e37SDavid S. Miller struct hlist_node bydst; 133abb81c4fSHerbert Xu }; 1348f126e37SDavid S. Miller struct hlist_node bysrc; 1358f126e37SDavid S. Miller struct hlist_node byspi; 1361da177e4SLinus Torvalds 1371da177e4SLinus Torvalds atomic_t refcnt; 1381da177e4SLinus Torvalds spinlock_t lock; 1391da177e4SLinus Torvalds 1401da177e4SLinus Torvalds struct xfrm_id id; 1411da177e4SLinus Torvalds struct xfrm_selector sel; 142bf825f81SJamal Hadi Salim struct xfrm_mark mark; 14335d2856bSMartin Willi u32 tfcpad; 1441da177e4SLinus Torvalds 1459d4a706dSDavid S. Miller u32 genid; 1469d4a706dSDavid S. Miller 14712a169e7SHerbert Xu /* Key manager bits */ 14812a169e7SHerbert Xu struct xfrm_state_walk km; 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds /* Parameters of this state. */ 1511da177e4SLinus Torvalds struct { 1521da177e4SLinus Torvalds u32 reqid; 1531da177e4SLinus Torvalds u8 mode; 1541da177e4SLinus Torvalds u8 replay_window; 1551da177e4SLinus Torvalds u8 aalgo, ealgo, calgo; 1561da177e4SLinus Torvalds u8 flags; 1571da177e4SLinus Torvalds u16 family; 1581da177e4SLinus Torvalds xfrm_address_t saddr; 1591da177e4SLinus Torvalds int header_len; 1601da177e4SLinus Torvalds int trailer_len; 161a947b0a9SNicolas Dichtel u32 extra_flags; 1621da177e4SLinus Torvalds } props; 1631da177e4SLinus Torvalds 1641da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds /* Data for transformer */ 1674447bb33SMartin Willi struct xfrm_algo_auth *aalg; 1681da177e4SLinus Torvalds struct xfrm_algo *ealg; 1691da177e4SLinus Torvalds struct xfrm_algo *calg; 1701a6509d9SHerbert Xu struct xfrm_algo_aead *aead; 17169b0137fSHerbert Xu const char *geniv; 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds /* Data for encapsulator */ 1741da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 1751da177e4SLinus Torvalds 176060f02a3SNoriaki TAKAMIYA /* Data for care-of address */ 177060f02a3SNoriaki TAKAMIYA xfrm_address_t *coaddr; 178060f02a3SNoriaki TAKAMIYA 1791da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1801da177e4SLinus Torvalds struct xfrm_state *tunnel; 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1831da177e4SLinus Torvalds atomic_t tunnel_users; 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds /* State for replay detection */ 1861da177e4SLinus Torvalds struct xfrm_replay_state replay; 1879736acf3SSteffen Klassert struct xfrm_replay_state_esn *replay_esn; 1881da177e4SLinus Torvalds 189f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 190f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 1919736acf3SSteffen Klassert struct xfrm_replay_state_esn *preplay_esn; 192f8cd5488SJamal Hadi Salim 1939fdc4883SSteffen Klassert /* The functions for replay detection. */ 1949fdc4883SSteffen Klassert struct xfrm_replay *repl; 1959fdc4883SSteffen Klassert 1962717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 1972717096aSJamal Hadi Salim * moment 1982717096aSJamal Hadi Salim */ 1992717096aSJamal Hadi Salim u32 xflags; 2002717096aSJamal Hadi Salim 201f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 202f8cd5488SJamal Hadi Salim u32 replay_maxage; 203f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 204f8cd5488SJamal Hadi Salim 205f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 206f8cd5488SJamal Hadi Salim struct timer_list rtimer; 207f8cd5488SJamal Hadi Salim 2081da177e4SLinus Torvalds /* Statistics */ 2091da177e4SLinus Torvalds struct xfrm_stats stats; 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 2129e0d57fdSYury Polyanskiy struct tasklet_hrtimer mtimer; 2131da177e4SLinus Torvalds 214e3c0d047SFan Du /* used to fix curlft->add_time when changing date */ 215e3c0d047SFan Du long saved_tmo; 216e3c0d047SFan Du 2179afaca05SMasahide NAKAMURA /* Last used time */ 218d26f3984SHerbert Xu unsigned long lastused; 2199afaca05SMasahide NAKAMURA 2201da177e4SLinus Torvalds /* Reference to data common to all the instances of this 2211da177e4SLinus Torvalds * transformer. */ 222533cb5b0SEric Dumazet const struct xfrm_type *type; 22313996378SHerbert Xu struct xfrm_mode *inner_mode; 224df9dcb45SKazunori MIYAZAWA struct xfrm_mode *inner_mode_iaf; 22513996378SHerbert Xu struct xfrm_mode *outer_mode; 2261da177e4SLinus Torvalds 227df71837dSTrent Jaeger /* Security context */ 228df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 229df71837dSTrent Jaeger 2301da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 2311da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 2321da177e4SLinus Torvalds void *data; 2331da177e4SLinus Torvalds }; 2341da177e4SLinus Torvalds 235673c09beSAlexey Dobriyan static inline struct net *xs_net(struct xfrm_state *x) 236673c09beSAlexey Dobriyan { 237673c09beSAlexey Dobriyan return read_pnet(&x->xs_net); 238673c09beSAlexey Dobriyan } 239673c09beSAlexey Dobriyan 2402717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2412717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 242e3c0d047SFan Du #define XFRM_SOFT_EXPIRE 2 2432717096aSJamal Hadi Salim 2441da177e4SLinus Torvalds enum { 2451da177e4SLinus Torvalds XFRM_STATE_VOID, 2461da177e4SLinus Torvalds XFRM_STATE_ACQ, 2471da177e4SLinus Torvalds XFRM_STATE_VALID, 2481da177e4SLinus Torvalds XFRM_STATE_ERROR, 2491da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2501da177e4SLinus Torvalds XFRM_STATE_DEAD 2511da177e4SLinus Torvalds }; 2521da177e4SLinus Torvalds 25326b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 254fd2c3ef7SEric Dumazet struct km_event { 255bf08867fSHerbert Xu union { 256bf08867fSHerbert Xu u32 hard; 257bf08867fSHerbert Xu u32 proto; 258bf08867fSHerbert Xu u32 byid; 259f8cd5488SJamal Hadi Salim u32 aevent; 260f7b6983fSMasahide NAKAMURA u32 type; 261bf08867fSHerbert Xu } data; 262bf08867fSHerbert Xu 26326b15dadSJamal Hadi Salim u32 seq; 26415e47304SEric W. Biederman u32 portid; 26526b15dadSJamal Hadi Salim u32 event; 2667067802eSAlexey Dobriyan struct net *net; 26726b15dadSJamal Hadi Salim }; 26826b15dadSJamal Hadi Salim 2699fdc4883SSteffen Klassert struct xfrm_replay { 2709fdc4883SSteffen Klassert void (*advance)(struct xfrm_state *x, __be32 net_seq); 2719fdc4883SSteffen Klassert int (*check)(struct xfrm_state *x, 2729fdc4883SSteffen Klassert struct sk_buff *skb, 2739fdc4883SSteffen Klassert __be32 net_seq); 2743b59df46SSteffen Klassert int (*recheck)(struct xfrm_state *x, 2753b59df46SSteffen Klassert struct sk_buff *skb, 2763b59df46SSteffen Klassert __be32 net_seq); 2779fdc4883SSteffen Klassert void (*notify)(struct xfrm_state *x, int event); 2789fdc4883SSteffen Klassert int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); 2799fdc4883SSteffen Klassert }; 2809fdc4883SSteffen Klassert 28125ee3286SHerbert Xu struct net_device; 2821da177e4SLinus Torvalds struct xfrm_type; 2831da177e4SLinus Torvalds struct xfrm_dst; 2841da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2851da177e4SLinus Torvalds unsigned short family; 2861da177e4SLinus Torvalds struct dst_ops *dst_ops; 287ddcfd796SAlexey Dobriyan void (*garbage_collect)(struct net *net); 28842a7b32bSDavid Ahern struct dst_entry *(*dst_lookup)(struct net *net, 28942a7b32bSDavid Ahern int tos, int oif, 2905e6b930fSDavid S. Miller const xfrm_address_t *saddr, 2915e6b930fSDavid S. Miller const xfrm_address_t *daddr); 29242a7b32bSDavid Ahern int (*get_saddr)(struct net *net, int oif, 29342a7b32bSDavid Ahern xfrm_address_t *saddr, 29442a7b32bSDavid Ahern xfrm_address_t *daddr); 2951da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 296d5422efeSHerbert Xu struct flowi *fl, 297d5422efeSHerbert Xu int reverse); 29805d84025SDavid S. Miller int (*get_tos)(const struct flowi *fl); 299a1b05140SMasahide NAKAMURA int (*init_path)(struct xfrm_dst *path, 300a1b05140SMasahide NAKAMURA struct dst_entry *dst, 301a1b05140SMasahide NAKAMURA int nfheader_len); 30225ee3286SHerbert Xu int (*fill_dst)(struct xfrm_dst *xdst, 30387c1e12bSHerbert Xu struct net_device *dev, 3040c7b3eefSDavid S. Miller const struct flowi *fl); 3052774c131SDavid S. Miller struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); 3061da177e4SLinus Torvalds }; 3071da177e4SLinus Torvalds 308d511337aSJoe Perches int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 309d511337aSJoe Perches int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 310d511337aSJoe Perches void km_policy_notify(struct xfrm_policy *xp, int dir, 311d511337aSJoe Perches const struct km_event *c); 312d511337aSJoe Perches void km_state_notify(struct xfrm_state *x, const struct km_event *c); 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds struct xfrm_tmpl; 315d511337aSJoe Perches int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, 316d511337aSJoe Perches struct xfrm_policy *pol); 317d511337aSJoe Perches void km_state_expired(struct xfrm_state *x, int hard, u32 portid); 318d511337aSJoe Perches int __xfrm_state_delete(struct xfrm_state *x); 31953bc6b4dSJamal Hadi Salim 3201da177e4SLinus Torvalds struct xfrm_state_afinfo { 32117c2a42aSHerbert Xu unsigned int family; 32236cf9acfSHerbert Xu unsigned int proto; 3238e3d716cSAl Viro __be16 eth_proto; 32417c2a42aSHerbert Xu struct module *owner; 325533cb5b0SEric Dumazet const struct xfrm_type *type_map[IPPROTO_MAX]; 326aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 327d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 32873e5ebb2SDavid S. Miller void (*init_tempsel)(struct xfrm_selector *sel, 32973e5ebb2SDavid S. Miller const struct flowi *fl); 33019bd6244SDavid S. Miller void (*init_temprop)(struct xfrm_state *x, 33119bd6244SDavid S. Miller const struct xfrm_tmpl *tmpl, 33219bd6244SDavid S. Miller const xfrm_address_t *daddr, 33319bd6244SDavid S. Miller const xfrm_address_t *saddr); 33441a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 33541a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 336ede2059dSEric W. Biederman int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb); 3377026b1ddSDavid Miller int (*output_finish)(struct sock *sk, struct sk_buff *skb); 338227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 339227620e2SHerbert Xu struct sk_buff *skb); 34036cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 34136cf9acfSHerbert Xu struct sk_buff *skb); 342716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 343716062fdSHerbert Xu int async); 344628e341fSHannes Frederic Sowa void (*local_error)(struct sk_buff *skb, u32 mtu); 3451da177e4SLinus Torvalds }; 3461da177e4SLinus Torvalds 347d511337aSJoe Perches int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 348d511337aSJoe Perches int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 349d511337aSJoe Perches struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); 350d511337aSJoe Perches void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); 3511da177e4SLinus Torvalds 3522f32b51bSSteffen Klassert struct xfrm_input_afinfo { 3532f32b51bSSteffen Klassert unsigned int family; 3542f32b51bSSteffen Klassert struct module *owner; 3552f32b51bSSteffen Klassert int (*callback)(struct sk_buff *skb, u8 protocol, 3562f32b51bSSteffen Klassert int err); 3572f32b51bSSteffen Klassert }; 3582f32b51bSSteffen Klassert 3592f32b51bSSteffen Klassert int xfrm_input_register_afinfo(struct xfrm_input_afinfo *afinfo); 3602f32b51bSSteffen Klassert int xfrm_input_unregister_afinfo(struct xfrm_input_afinfo *afinfo); 3612f32b51bSSteffen Klassert 362d511337aSJoe Perches void xfrm_state_delete_tunnel(struct xfrm_state *x); 3631da177e4SLinus Torvalds 364fd2c3ef7SEric Dumazet struct xfrm_type { 3651da177e4SLinus Torvalds char *description; 3661da177e4SLinus Torvalds struct module *owner; 367a6337463Sjamal u8 proto; 368a6337463Sjamal u8 flags; 3691b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 370436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 371f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 372f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3731da177e4SLinus Torvalds 37472cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 3751da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 376e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3771da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 3788f029de2SDavid S. Miller int (*reject)(struct xfrm_state *, struct sk_buff *, 3798f029de2SDavid S. Miller const struct flowi *); 380aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3811da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 382c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3831da177e4SLinus Torvalds }; 3841da177e4SLinus Torvalds 385d511337aSJoe Perches int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 386d511337aSJoe Perches int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 3871da177e4SLinus Torvalds 388b59f45d0SHerbert Xu struct xfrm_mode { 389227620e2SHerbert Xu /* 390227620e2SHerbert Xu * Remove encapsulation header. 391227620e2SHerbert Xu * 392227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 393227620e2SHerbert Xu * header. 394227620e2SHerbert Xu * 395227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 396227620e2SHerbert Xu * should be and the network header shall be set to where the IP 397227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 398227620e2SHerbert Xu * payload. 399227620e2SHerbert Xu */ 400227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 401227620e2SHerbert Xu 402227620e2SHerbert Xu /* 403227620e2SHerbert Xu * This is the actual input entry point. 404227620e2SHerbert Xu * 405227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 406227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 407227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 408227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 409227620e2SHerbert Xu */ 410b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 41137fedd3aSHerbert Xu 41237fedd3aSHerbert Xu /* 41337fedd3aSHerbert Xu * Add encapsulation header. 41437fedd3aSHerbert Xu * 41537fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 41637fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 41737fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 41837fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 41937fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 42037fedd3aSHerbert Xu * header. The value of the network header will always point 42137fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 42237fedd3aSHerbert Xu */ 42336cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 42436cf9acfSHerbert Xu 42536cf9acfSHerbert Xu /* 42636cf9acfSHerbert Xu * This is the actual output entry point. 42736cf9acfSHerbert Xu * 42836cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 42936cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 43036cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 43136cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 43236cf9acfSHerbert Xu * call output2. 43336cf9acfSHerbert Xu */ 434eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 435b59f45d0SHerbert Xu 43617c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 437b59f45d0SHerbert Xu struct module *owner; 438b59f45d0SHerbert Xu unsigned int encap; 4391bfcb10fSHerbert Xu int flags; 4401bfcb10fSHerbert Xu }; 4411bfcb10fSHerbert Xu 4421bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 4431bfcb10fSHerbert Xu enum { 4441bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 445b59f45d0SHerbert Xu }; 446b59f45d0SHerbert Xu 447d511337aSJoe Perches int xfrm_register_mode(struct xfrm_mode *mode, int family); 448d511337aSJoe Perches int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 449b59f45d0SHerbert Xu 450df9dcb45SKazunori MIYAZAWA static inline int xfrm_af2proto(unsigned int family) 451df9dcb45SKazunori MIYAZAWA { 452df9dcb45SKazunori MIYAZAWA switch(family) { 453df9dcb45SKazunori MIYAZAWA case AF_INET: 454df9dcb45SKazunori MIYAZAWA return IPPROTO_IPIP; 455df9dcb45SKazunori MIYAZAWA case AF_INET6: 456df9dcb45SKazunori MIYAZAWA return IPPROTO_IPV6; 457df9dcb45SKazunori MIYAZAWA default: 458df9dcb45SKazunori MIYAZAWA return 0; 459df9dcb45SKazunori MIYAZAWA } 460df9dcb45SKazunori MIYAZAWA } 461df9dcb45SKazunori MIYAZAWA 462df9dcb45SKazunori MIYAZAWA static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) 463df9dcb45SKazunori MIYAZAWA { 464df9dcb45SKazunori MIYAZAWA if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || 465df9dcb45SKazunori MIYAZAWA (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) 466df9dcb45SKazunori MIYAZAWA return x->inner_mode; 467df9dcb45SKazunori MIYAZAWA else 468df9dcb45SKazunori MIYAZAWA return x->inner_mode_iaf; 469df9dcb45SKazunori MIYAZAWA } 470df9dcb45SKazunori MIYAZAWA 471fd2c3ef7SEric Dumazet struct xfrm_tmpl { 4721da177e4SLinus Torvalds /* id in template is interpreted as: 4731da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 4741da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 4751da177e4SLinus Torvalds * daddr must be fixed too. 4761da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 4771da177e4SLinus Torvalds */ 4781da177e4SLinus Torvalds struct xfrm_id id; 4791da177e4SLinus Torvalds 4801da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 4811da177e4SLinus Torvalds xfrm_address_t saddr; 4821da177e4SLinus Torvalds 48376b3f055SMiika Komu unsigned short encap_family; 48476b3f055SMiika Komu 485a6337463Sjamal u32 reqid; 4861da177e4SLinus Torvalds 4877e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 488a6337463Sjamal u8 mode; 4891da177e4SLinus Torvalds 4901da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 491a6337463Sjamal u8 share; 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 494a6337463Sjamal u8 optional; 4951da177e4SLinus Torvalds 496c5d18e98SHerbert Xu /* Skip aalgos/ealgos/calgos checks. */ 497a6337463Sjamal u8 allalgs; 498c5d18e98SHerbert Xu 4991da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 500a6337463Sjamal u32 aalgos; 501a6337463Sjamal u32 ealgos; 502a6337463Sjamal u32 calgos; 5031da177e4SLinus Torvalds }; 5041da177e4SLinus Torvalds 505622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 5061da177e4SLinus Torvalds 50712a169e7SHerbert Xu struct xfrm_policy_walk_entry { 50812a169e7SHerbert Xu struct list_head all; 50912a169e7SHerbert Xu u8 dead; 51012a169e7SHerbert Xu }; 51112a169e7SHerbert Xu 51212a169e7SHerbert Xu struct xfrm_policy_walk { 51312a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 51412a169e7SHerbert Xu u8 type; 51512a169e7SHerbert Xu u32 seq; 51612a169e7SHerbert Xu }; 51712a169e7SHerbert Xu 518a0073fe1SSteffen Klassert struct xfrm_policy_queue { 519a0073fe1SSteffen Klassert struct sk_buff_head hold_queue; 520a0073fe1SSteffen Klassert struct timer_list hold_timer; 521a0073fe1SSteffen Klassert unsigned long timeout; 522a0073fe1SSteffen Klassert }; 523a0073fe1SSteffen Klassert 524fd2c3ef7SEric Dumazet struct xfrm_policy { 5250c5c9fb5SEric W. Biederman possible_net_t xp_net; 5262518c7c2SDavid S. Miller struct hlist_node bydst; 5272518c7c2SDavid S. Miller struct hlist_node byidx; 5281da177e4SLinus Torvalds 5291da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 5301da177e4SLinus Torvalds rwlock_t lock; 5311da177e4SLinus Torvalds atomic_t refcnt; 5321da177e4SLinus Torvalds struct timer_list timer; 5331da177e4SLinus Torvalds 534fe1a5f03STimo Teräs struct flow_cache_object flo; 53580c802f3STimo Teräs atomic_t genid; 5361da177e4SLinus Torvalds u32 priority; 5371da177e4SLinus Torvalds u32 index; 538bf825f81SJamal Hadi Salim struct xfrm_mark mark; 5391da177e4SLinus Torvalds struct xfrm_selector selector; 5401da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 5411da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 54212a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 543a0073fe1SSteffen Klassert struct xfrm_policy_queue polq; 54446ca5f5dSArnaldo Carvalho de Melo u8 type; 54546ca5f5dSArnaldo Carvalho de Melo u8 action; 54646ca5f5dSArnaldo Carvalho de Melo u8 flags; 54746ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 54812a169e7SHerbert Xu u16 family; 549df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 5501da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 55156f04730SEric Dumazet struct rcu_head rcu; 5521da177e4SLinus Torvalds }; 5531da177e4SLinus Torvalds 55463eb23f5SDavid S. Miller static inline struct net *xp_net(const struct xfrm_policy *xp) 5550331b1f3SAlexey Dobriyan { 5560331b1f3SAlexey Dobriyan return read_pnet(&xp->xp_net); 5570331b1f3SAlexey Dobriyan } 5580331b1f3SAlexey Dobriyan 55913c1d189SArnaud Ebalard struct xfrm_kmaddress { 56013c1d189SArnaud Ebalard xfrm_address_t local; 56113c1d189SArnaud Ebalard xfrm_address_t remote; 56213c1d189SArnaud Ebalard u32 reserved; 56313c1d189SArnaud Ebalard u16 family; 56413c1d189SArnaud Ebalard }; 56513c1d189SArnaud Ebalard 56680c9abaaSShinta Sugimoto struct xfrm_migrate { 56780c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 56880c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 56980c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 57080c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 57180c9abaaSShinta Sugimoto u8 proto; 57280c9abaaSShinta Sugimoto u8 mode; 57380c9abaaSShinta Sugimoto u16 reserved; 57480c9abaaSShinta Sugimoto u32 reqid; 57580c9abaaSShinta Sugimoto u16 old_family; 57680c9abaaSShinta Sugimoto u16 new_family; 57780c9abaaSShinta Sugimoto }; 57880c9abaaSShinta Sugimoto 5791da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 580f8cd5488SJamal Hadi Salim /* what happened */ 581f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 582f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 583f8cd5488SJamal Hadi Salim 584f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 585f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 586f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 587f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 588f8cd5488SJamal Hadi Salim /* default seq threshold size */ 589f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 5901da177e4SLinus Torvalds 591fd2c3ef7SEric Dumazet struct xfrm_mgr { 5921da177e4SLinus Torvalds struct list_head list; 5931da177e4SLinus Torvalds char *id; 594214e005bSDavid S. Miller int (*notify)(struct xfrm_state *x, const struct km_event *c); 59565e0736bSFan Du int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); 596cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 5975d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 598214e005bSDavid S. Miller int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); 599db983c11SAlexey Dobriyan int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 600183cad12SDavid S. Miller int (*migrate)(const struct xfrm_selector *sel, 601183cad12SDavid S. Miller u8 dir, u8 type, 602183cad12SDavid S. Miller const struct xfrm_migrate *m, 603183cad12SDavid S. Miller int num_bundles, 604183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 6050f24558eSHoria Geanta bool (*is_alive)(const struct km_event *c); 6061da177e4SLinus Torvalds }; 6071da177e4SLinus Torvalds 608d511337aSJoe Perches int xfrm_register_km(struct xfrm_mgr *km); 609d511337aSJoe Perches int xfrm_unregister_km(struct xfrm_mgr *km); 6101da177e4SLinus Torvalds 61170be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb { 61270be6c91SSteffen Klassert union { 61370be6c91SSteffen Klassert struct inet_skb_parm h4; 61470be6c91SSteffen Klassert struct inet6_skb_parm h6; 61570be6c91SSteffen Klassert } header; 61670be6c91SSteffen Klassert 61770be6c91SSteffen Klassert union { 61870be6c91SSteffen Klassert struct ip_tunnel *ip4; 61970be6c91SSteffen Klassert struct ip6_tnl *ip6; 62070be6c91SSteffen Klassert } tunnel; 62170be6c91SSteffen Klassert }; 62270be6c91SSteffen Klassert 62370be6c91SSteffen Klassert #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) 62470be6c91SSteffen Klassert 625436a0a40SHerbert Xu /* 626436a0a40SHerbert Xu * This structure is used for the duration where packets are being 627436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 628436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 629436a0a40SHerbert Xu */ 630436a0a40SHerbert Xu struct xfrm_skb_cb { 63170be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb header; 632436a0a40SHerbert Xu 633436a0a40SHerbert Xu /* Sequence number for replay protection. */ 634b318e0e4SHerbert Xu union { 6351ce3644aSSteffen Klassert struct { 6361ce3644aSSteffen Klassert __u32 low; 6371ce3644aSSteffen Klassert __u32 hi; 6381ce3644aSSteffen Klassert } output; 6391ce3644aSSteffen Klassert struct { 6401ce3644aSSteffen Klassert __be32 low; 6411ce3644aSSteffen Klassert __be32 hi; 6421ce3644aSSteffen Klassert } input; 643b318e0e4SHerbert Xu } seq; 644436a0a40SHerbert Xu }; 645436a0a40SHerbert Xu 646436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 647436a0a40SHerbert Xu 64836cf9acfSHerbert Xu /* 64936cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 65036cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 65136cf9acfSHerbert Xu */ 65236cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 65370be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb header; 65436cf9acfSHerbert Xu 65536cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 65636cf9acfSHerbert Xu __be16 id; 65736cf9acfSHerbert Xu __be16 frag_off; 65836cf9acfSHerbert Xu 659732c8bd5SHerbert Xu /* IP header length (excluding options or extension headers). */ 660732c8bd5SHerbert Xu u8 ihl; 661732c8bd5SHerbert Xu 66236cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 66336cf9acfSHerbert Xu u8 tos; 66436cf9acfSHerbert Xu 66536cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 66636cf9acfSHerbert Xu u8 ttl; 66736cf9acfSHerbert Xu 66836cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 66936cf9acfSHerbert Xu u8 protocol; 67036cf9acfSHerbert Xu 671732c8bd5SHerbert Xu /* Option length for IPv4, zero for IPv6. */ 672732c8bd5SHerbert Xu u8 optlen; 673732c8bd5SHerbert Xu 67436cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 67536cf9acfSHerbert Xu u8 flow_lbl[3]; 67636cf9acfSHerbert Xu }; 67736cf9acfSHerbert Xu 67836cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 67936cf9acfSHerbert Xu 680716062fdSHerbert Xu /* 681716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 682716062fdSHerbert Xu * related information. 683716062fdSHerbert Xu */ 684716062fdSHerbert Xu struct xfrm_spi_skb_cb { 68570be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb header; 686716062fdSHerbert Xu 687716062fdSHerbert Xu unsigned int daddroff; 6882fcb45b6SHerbert Xu unsigned int family; 689716062fdSHerbert Xu }; 690716062fdSHerbert Xu 691716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 692716062fdSHerbert Xu 693c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 694afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 695ab5f5e8bSJoy Latten { 696ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 697ab5f5e8bSJoy Latten 698afeb14b4SPaul Moore if (audit_enabled == 0) 699afeb14b4SPaul Moore return NULL; 700ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 701ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 702ab5f5e8bSJoy Latten if (audit_buf == NULL) 703ab5f5e8bSJoy Latten return NULL; 704afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 705afeb14b4SPaul Moore return audit_buf; 706afeb14b4SPaul Moore } 707afeb14b4SPaul Moore 7082e71029eSTetsuo Handa static inline void xfrm_audit_helper_usrinfo(bool task_valid, 709afeb14b4SPaul Moore struct audit_buffer *audit_buf) 710afeb14b4SPaul Moore { 7112e71029eSTetsuo Handa const unsigned int auid = from_kuid(&init_user_ns, task_valid ? 7122e71029eSTetsuo Handa audit_get_loginuid(current) : 7132e71029eSTetsuo Handa INVALID_UID); 7142e71029eSTetsuo Handa const unsigned int ses = task_valid ? audit_get_sessionid(current) : 7152e71029eSTetsuo Handa (unsigned int) -1; 7162e71029eSTetsuo Handa 7172e71029eSTetsuo Handa audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); 718ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 719ab5f5e8bSJoy Latten } 720ab5f5e8bSJoy Latten 7212e71029eSTetsuo Handa void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid); 7222e71029eSTetsuo Handa void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 7232e71029eSTetsuo Handa bool task_valid); 7242e71029eSTetsuo Handa void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid); 7252e71029eSTetsuo Handa void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid); 726d511337aSJoe Perches void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 727afeb14b4SPaul Moore struct sk_buff *skb); 728d511337aSJoe Perches void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, 729d511337aSJoe Perches __be32 net_seq); 730d511337aSJoe Perches void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 731d511337aSJoe Perches void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, 732d511337aSJoe Perches __be32 net_seq); 733d511337aSJoe Perches void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, 734d511337aSJoe Perches u8 proto); 735c9204d9cSJoy Latten #else 73641fef0eeSMarcin Slusarz 73741fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 7382e71029eSTetsuo Handa bool task_valid) 73941fef0eeSMarcin Slusarz { 74041fef0eeSMarcin Slusarz } 74141fef0eeSMarcin Slusarz 74241fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 7432e71029eSTetsuo Handa bool task_valid) 74441fef0eeSMarcin Slusarz { 74541fef0eeSMarcin Slusarz } 74641fef0eeSMarcin Slusarz 74741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, 7482e71029eSTetsuo Handa bool task_valid) 74941fef0eeSMarcin Slusarz { 75041fef0eeSMarcin Slusarz } 75141fef0eeSMarcin Slusarz 75241fef0eeSMarcin Slusarz static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, 7532e71029eSTetsuo Handa bool task_valid) 75441fef0eeSMarcin Slusarz { 75541fef0eeSMarcin Slusarz } 75641fef0eeSMarcin Slusarz 75741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 75841fef0eeSMarcin Slusarz struct sk_buff *skb) 75941fef0eeSMarcin Slusarz { 76041fef0eeSMarcin Slusarz } 76141fef0eeSMarcin Slusarz 7629fdc4883SSteffen Klassert static inline void xfrm_audit_state_replay(struct xfrm_state *x, 7639fdc4883SSteffen Klassert struct sk_buff *skb, __be32 net_seq) 7649fdc4883SSteffen Klassert { 7659fdc4883SSteffen Klassert } 7669fdc4883SSteffen Klassert 76741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, 76841fef0eeSMarcin Slusarz u16 family) 76941fef0eeSMarcin Slusarz { 77041fef0eeSMarcin Slusarz } 77141fef0eeSMarcin Slusarz 77241fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 77341fef0eeSMarcin Slusarz __be32 net_spi, __be32 net_seq) 77441fef0eeSMarcin Slusarz { 77541fef0eeSMarcin Slusarz } 77641fef0eeSMarcin Slusarz 77741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, 77841fef0eeSMarcin Slusarz struct sk_buff *skb, u8 proto) 77941fef0eeSMarcin Slusarz { 78041fef0eeSMarcin Slusarz } 781c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 782161a09e7SJoy Latten 7831da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 7841da177e4SLinus Torvalds { 7851da177e4SLinus Torvalds if (likely(policy != NULL)) 7861da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 7871da177e4SLinus Torvalds } 7881da177e4SLinus Torvalds 789d511337aSJoe Perches void xfrm_policy_destroy(struct xfrm_policy *policy); 7901da177e4SLinus Torvalds 7911da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 7921da177e4SLinus Torvalds { 7931da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 79464c31b3fSWANG Cong xfrm_policy_destroy(policy); 7951da177e4SLinus Torvalds } 7961da177e4SLinus Torvalds 7974e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7984e81bb83SMasahide NAKAMURA { 7994e81bb83SMasahide NAKAMURA int i; 8004e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 8014e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 8024e81bb83SMasahide NAKAMURA } 8034e81bb83SMasahide NAKAMURA 804d511337aSJoe Perches void __xfrm_state_destroy(struct xfrm_state *); 8051da177e4SLinus Torvalds 80621380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 80721380b81SHerbert Xu { 80821380b81SHerbert Xu atomic_dec(&x->refcnt); 80921380b81SHerbert Xu } 81021380b81SHerbert Xu 8111da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 8121da177e4SLinus Torvalds { 8131da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 8141da177e4SLinus Torvalds __xfrm_state_destroy(x); 8151da177e4SLinus Torvalds } 8161da177e4SLinus Torvalds 8171da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 8181da177e4SLinus Torvalds { 8191da177e4SLinus Torvalds atomic_inc(&x->refcnt); 8201da177e4SLinus Torvalds } 8211da177e4SLinus Torvalds 8221744a8feSDavid S. Miller static inline bool addr_match(const void *token1, const void *token2, 8231744a8feSDavid S. Miller int prefixlen) 8241da177e4SLinus Torvalds { 8251744a8feSDavid S. Miller const __be32 *a1 = token1; 8261744a8feSDavid S. Miller const __be32 *a2 = token2; 8271da177e4SLinus Torvalds int pdw; 8281da177e4SLinus Torvalds int pbi; 8291da177e4SLinus Torvalds 830a6337463Sjamal pdw = prefixlen >> 5; /* num of whole u32 in prefix */ 8311da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 8321da177e4SLinus Torvalds 8331da177e4SLinus Torvalds if (pdw) 8341da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 8351744a8feSDavid S. Miller return false; 8361da177e4SLinus Torvalds 8371da177e4SLinus Torvalds if (pbi) { 8385f19343fSAl Viro __be32 mask; 8391da177e4SLinus Torvalds 8401da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 8411da177e4SLinus Torvalds 8421da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 8431744a8feSDavid S. Miller return false; 8441da177e4SLinus Torvalds } 8451da177e4SLinus Torvalds 8461744a8feSDavid S. Miller return true; 8471da177e4SLinus Torvalds } 8481da177e4SLinus Torvalds 84926bff940SAlexey Dobriyan static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) 85026bff940SAlexey Dobriyan { 85126bff940SAlexey Dobriyan /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ 85226bff940SAlexey Dobriyan if (prefixlen == 0) 85326bff940SAlexey Dobriyan return true; 85426bff940SAlexey Dobriyan return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen))); 85526bff940SAlexey Dobriyan } 85626bff940SAlexey Dobriyan 8571da177e4SLinus Torvalds static __inline__ 8586281dcc9SDavid S. Miller __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) 8591da177e4SLinus Torvalds { 860f9d07e41SAl Viro __be16 port; 8611d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8621da177e4SLinus Torvalds case IPPROTO_TCP: 8631da177e4SLinus Torvalds case IPPROTO_UDP: 864ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8651da177e4SLinus Torvalds case IPPROTO_SCTP: 8666281dcc9SDavid S. Miller port = uli->ports.sport; 8671da177e4SLinus Torvalds break; 8681da177e4SLinus Torvalds case IPPROTO_ICMP: 8691da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8706281dcc9SDavid S. Miller port = htons(uli->icmpt.type); 8711da177e4SLinus Torvalds break; 8722ce4272aSMasahide NAKAMURA case IPPROTO_MH: 8736281dcc9SDavid S. Miller port = htons(uli->mht.type); 8742ce4272aSMasahide NAKAMURA break; 875cc9ff19dSTimo Teräs case IPPROTO_GRE: 8766281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) >> 16); 877cc9ff19dSTimo Teräs break; 8781da177e4SLinus Torvalds default: 8791da177e4SLinus Torvalds port = 0; /*XXX*/ 8801da177e4SLinus Torvalds } 8811da177e4SLinus Torvalds return port; 8821da177e4SLinus Torvalds } 8831da177e4SLinus Torvalds 8841da177e4SLinus Torvalds static __inline__ 8856281dcc9SDavid S. Miller __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) 8861da177e4SLinus Torvalds { 887f9d07e41SAl Viro __be16 port; 8881d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8891da177e4SLinus Torvalds case IPPROTO_TCP: 8901da177e4SLinus Torvalds case IPPROTO_UDP: 891ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8921da177e4SLinus Torvalds case IPPROTO_SCTP: 8936281dcc9SDavid S. Miller port = uli->ports.dport; 8941da177e4SLinus Torvalds break; 8951da177e4SLinus Torvalds case IPPROTO_ICMP: 8961da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8976281dcc9SDavid S. Miller port = htons(uli->icmpt.code); 8981da177e4SLinus Torvalds break; 899cc9ff19dSTimo Teräs case IPPROTO_GRE: 9006281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) & 0xffff); 901cc9ff19dSTimo Teräs break; 9021da177e4SLinus Torvalds default: 9031da177e4SLinus Torvalds port = 0; /*XXX*/ 9041da177e4SLinus Torvalds } 9051da177e4SLinus Torvalds return port; 9061da177e4SLinus Torvalds } 9071da177e4SLinus Torvalds 908d511337aSJoe Perches bool xfrm_selector_match(const struct xfrm_selector *sel, 909d511337aSJoe Perches const struct flowi *fl, unsigned short family); 9101da177e4SLinus Torvalds 911df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 912df71837dSTrent Jaeger /* If neither has a context --> match 913df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 914df71837dSTrent Jaeger */ 915bc9b35adSDavid S. Miller static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 916df71837dSTrent Jaeger { 917df71837dSTrent Jaeger return ((!s1 && !s2) || 918df71837dSTrent Jaeger (s1 && s2 && 919df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 920df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 921df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 922df71837dSTrent Jaeger } 923df71837dSTrent Jaeger #else 924bc9b35adSDavid S. Miller static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 925df71837dSTrent Jaeger { 926bc9b35adSDavid S. Miller return true; 927df71837dSTrent Jaeger } 928df71837dSTrent Jaeger #endif 929df71837dSTrent Jaeger 9301da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 9311da177e4SLinus Torvalds * 9321da177e4SLinus Torvalds * dst->child points to the next element of bundle. 9331da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 9341da177e4SLinus Torvalds * 9351da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 9361da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 9371da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 9381da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 9391da177e4SLinus Torvalds * policy rule. 9401da177e4SLinus Torvalds */ 941fd2c3ef7SEric Dumazet struct xfrm_dst { 9421da177e4SLinus Torvalds union { 9431da177e4SLinus Torvalds struct dst_entry dst; 9441da177e4SLinus Torvalds struct rtable rt; 9451da177e4SLinus Torvalds struct rt6_info rt6; 9461da177e4SLinus Torvalds } u; 9471da177e4SLinus Torvalds struct dst_entry *route; 94880c802f3STimo Teräs struct flow_cache_object flo; 94980c802f3STimo Teräs struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; 95080c802f3STimo Teräs int num_pols, num_xfrms; 951157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 952157bfc25SMasahide NAKAMURA struct flowi *origin; 953157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 954157bfc25SMasahide NAKAMURA #endif 95580c802f3STimo Teräs u32 xfrm_genid; 95680c802f3STimo Teräs u32 policy_genid; 9571da177e4SLinus Torvalds u32 route_mtu_cached; 9581da177e4SLinus Torvalds u32 child_mtu_cached; 95992d63decSHideaki YOSHIFUJI u32 route_cookie; 96092d63decSHideaki YOSHIFUJI u32 path_cookie; 9611da177e4SLinus Torvalds }; 9621da177e4SLinus Torvalds 963def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 964aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 965aabc9761SHerbert Xu { 96680c802f3STimo Teräs xfrm_pols_put(xdst->pols, xdst->num_pols); 967aabc9761SHerbert Xu dst_release(xdst->route); 968aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 969aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 970157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 971157bfc25SMasahide NAKAMURA kfree(xdst->origin); 972157bfc25SMasahide NAKAMURA xdst->origin = NULL; 973157bfc25SMasahide NAKAMURA kfree(xdst->partner); 974157bfc25SMasahide NAKAMURA xdst->partner = NULL; 975157bfc25SMasahide NAKAMURA #endif 976aabc9761SHerbert Xu } 977def8b4faSAlexey Dobriyan #endif 978aabc9761SHerbert Xu 979d511337aSJoe Perches void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 980aabc9761SHerbert Xu 981fd2c3ef7SEric Dumazet struct sec_path { 9821da177e4SLinus Torvalds atomic_t refcnt; 9831da177e4SLinus Torvalds int len; 984dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 9851da177e4SLinus Torvalds }; 9861da177e4SLinus Torvalds 987990078afSMichael Smith static inline int secpath_exists(struct sk_buff *skb) 988990078afSMichael Smith { 989990078afSMichael Smith #ifdef CONFIG_XFRM 990990078afSMichael Smith return skb->sp != NULL; 991990078afSMichael Smith #else 992990078afSMichael Smith return 0; 993990078afSMichael Smith #endif 994990078afSMichael Smith } 995990078afSMichael Smith 9961da177e4SLinus Torvalds static inline struct sec_path * 9971da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 9981da177e4SLinus Torvalds { 9991da177e4SLinus Torvalds if (sp) 10001da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 10011da177e4SLinus Torvalds return sp; 10021da177e4SLinus Torvalds } 10031da177e4SLinus Torvalds 1004d511337aSJoe Perches void __secpath_destroy(struct sec_path *sp); 10051da177e4SLinus Torvalds 10061da177e4SLinus Torvalds static inline void 10071da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 10081da177e4SLinus Torvalds { 10091da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 10101da177e4SLinus Torvalds __secpath_destroy(sp); 10111da177e4SLinus Torvalds } 10121da177e4SLinus Torvalds 1013d511337aSJoe Perches struct sec_path *secpath_dup(struct sec_path *src); 10141da177e4SLinus Torvalds 10151da177e4SLinus Torvalds static inline void 10161da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 10171da177e4SLinus Torvalds { 10181da177e4SLinus Torvalds #ifdef CONFIG_XFRM 10191da177e4SLinus Torvalds secpath_put(skb->sp); 10201da177e4SLinus Torvalds skb->sp = NULL; 10211da177e4SLinus Torvalds #endif 10221da177e4SLinus Torvalds } 10231da177e4SLinus Torvalds 10241da177e4SLinus Torvalds static inline int 10256cc32961SDavid S. Miller xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) 1026a1e59abfSPatrick McHardy { 1027a1e59abfSPatrick McHardy switch (family) { 1028a1e59abfSPatrick McHardy case AF_INET: 1029a1e59abfSPatrick McHardy return addr->a4 == 0; 1030a1e59abfSPatrick McHardy case AF_INET6: 103115e318bdSJiri Benc return ipv6_addr_any(&addr->in6); 1032a1e59abfSPatrick McHardy } 1033a1e59abfSPatrick McHardy return 0; 1034a1e59abfSPatrick McHardy } 1035a1e59abfSPatrick McHardy 1036a1e59abfSPatrick McHardy static inline int 103721eddb5cSDavid S. Miller __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 10381da177e4SLinus Torvalds { 10391da177e4SLinus Torvalds return (tmpl->saddr.a4 && 10401da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 10411da177e4SLinus Torvalds } 10421da177e4SLinus Torvalds 10431da177e4SLinus Torvalds static inline int 104421eddb5cSDavid S. Miller __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 10451da177e4SLinus Torvalds { 10461da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 1047ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 10481da177e4SLinus Torvalds } 10491da177e4SLinus Torvalds 10501da177e4SLinus Torvalds static inline int 105121eddb5cSDavid S. Miller xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) 10521da177e4SLinus Torvalds { 10531da177e4SLinus Torvalds switch (family) { 10541da177e4SLinus Torvalds case AF_INET: 10551da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 10561da177e4SLinus Torvalds case AF_INET6: 10571da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 10581da177e4SLinus Torvalds } 10591da177e4SLinus Torvalds return !0; 10601da177e4SLinus Torvalds } 10611da177e4SLinus Torvalds 10621da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1063d511337aSJoe Perches int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, 1064d511337aSJoe Perches unsigned short family); 10651da177e4SLinus Torvalds 1066d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 1067d5422efeSHerbert Xu struct sk_buff *skb, 1068d5422efeSHerbert Xu unsigned int family, int reverse) 10691da177e4SLinus Torvalds { 1070f6e1e25dSAlexey Dobriyan struct net *net = dev_net(skb->dev); 1071d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 1072d5422efeSHerbert Xu 10731da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 1074d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 10751da177e4SLinus Torvalds 1076f6e1e25dSAlexey Dobriyan return (!net->xfrm.policy_count[dir] && !skb->sp) || 1077adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOPOLICY) || 1078d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 1079d5422efeSHerbert Xu } 1080d5422efeSHerbert Xu 1081d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 1082d5422efeSHerbert Xu { 1083d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 10841da177e4SLinus Torvalds } 10851da177e4SLinus Torvalds 10861da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10871da177e4SLinus Torvalds { 10881da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 10891da177e4SLinus Torvalds } 10901da177e4SLinus Torvalds 10911da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10921da177e4SLinus Torvalds { 10931da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 10941da177e4SLinus Torvalds } 10951da177e4SLinus Torvalds 1096d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1097d5422efeSHerbert Xu struct sk_buff *skb) 1098d5422efeSHerbert Xu { 1099d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 1100d5422efeSHerbert Xu } 1101d5422efeSHerbert Xu 1102d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1103d5422efeSHerbert Xu struct sk_buff *skb) 1104d5422efeSHerbert Xu { 1105d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 1106d5422efeSHerbert Xu } 1107d5422efeSHerbert Xu 1108d511337aSJoe Perches int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1109d5422efeSHerbert Xu unsigned int family, int reverse); 1110d5422efeSHerbert Xu 1111d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1112d5422efeSHerbert Xu unsigned int family) 1113d5422efeSHerbert Xu { 1114d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 1115d5422efeSHerbert Xu } 1116d5422efeSHerbert Xu 1117d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1118d5422efeSHerbert Xu struct flowi *fl, 1119d5422efeSHerbert Xu unsigned int family) 1120d5422efeSHerbert Xu { 1121d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 1122d5422efeSHerbert Xu } 1123d5422efeSHerbert Xu 1124d511337aSJoe Perches int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 11251da177e4SLinus Torvalds 11261da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 11271da177e4SLinus Torvalds { 112899a66657SAlexey Dobriyan struct net *net = dev_net(skb->dev); 112999a66657SAlexey Dobriyan 113099a66657SAlexey Dobriyan return !net->xfrm.policy_count[XFRM_POLICY_OUT] || 1131adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOXFRM) || 11321da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 11331da177e4SLinus Torvalds } 11341da177e4SLinus Torvalds 11351da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 11361da177e4SLinus Torvalds { 11371da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 11381da177e4SLinus Torvalds } 11391da177e4SLinus Torvalds 11401da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 11411da177e4SLinus Torvalds { 11421da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 11431da177e4SLinus Torvalds } 11441da177e4SLinus Torvalds 1145d188ba86SEric Dumazet int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk); 11461da177e4SLinus Torvalds 1147d188ba86SEric Dumazet static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) 11481da177e4SLinus Torvalds { 1149d188ba86SEric Dumazet sk->sk_policy[0] = NULL; 1150d188ba86SEric Dumazet sk->sk_policy[1] = NULL; 1151d188ba86SEric Dumazet if (unlikely(osk->sk_policy[0] || osk->sk_policy[1])) 1152d188ba86SEric Dumazet return __xfrm_sk_clone_policy(sk, osk); 11531da177e4SLinus Torvalds return 0; 11541da177e4SLinus Torvalds } 11551da177e4SLinus Torvalds 1156d511337aSJoe Perches int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 11571da177e4SLinus Torvalds 11581da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 11591da177e4SLinus Torvalds { 1160d188ba86SEric Dumazet struct xfrm_policy *pol; 1161d188ba86SEric Dumazet 1162d188ba86SEric Dumazet pol = rcu_dereference_protected(sk->sk_policy[0], 1); 1163d188ba86SEric Dumazet if (unlikely(pol != NULL)) { 1164d188ba86SEric Dumazet xfrm_policy_delete(pol, XFRM_POLICY_MAX); 11651da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 11661da177e4SLinus Torvalds } 1167d188ba86SEric Dumazet pol = rcu_dereference_protected(sk->sk_policy[1], 1); 1168d188ba86SEric Dumazet if (unlikely(pol != NULL)) { 1169d188ba86SEric Dumazet xfrm_policy_delete(pol, XFRM_POLICY_MAX+1); 11701da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 11711da177e4SLinus Torvalds } 11721da177e4SLinus Torvalds } 11731da177e4SLinus Torvalds 1174d511337aSJoe Perches void xfrm_garbage_collect(struct net *net); 1175e4c17216SPaul Moore 11761da177e4SLinus Torvalds #else 11771da177e4SLinus Torvalds 11781da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 1179d188ba86SEric Dumazet static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; } 11801da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 11811da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 11821da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11831da177e4SLinus Torvalds { 11841da177e4SLinus Torvalds return 1; 11851da177e4SLinus Torvalds } 11861da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11871da177e4SLinus Torvalds { 11881da177e4SLinus Torvalds return 1; 11891da177e4SLinus Torvalds } 11901da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 11911da177e4SLinus Torvalds { 11921da177e4SLinus Torvalds return 1; 11931da177e4SLinus Torvalds } 1194d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1195d5422efeSHerbert Xu struct flowi *fl, 1196d5422efeSHerbert Xu unsigned int family) 1197d5422efeSHerbert Xu { 1198d5422efeSHerbert Xu return -ENOSYS; 1199d5422efeSHerbert Xu } 1200d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1201d5422efeSHerbert Xu struct sk_buff *skb) 1202d5422efeSHerbert Xu { 1203d5422efeSHerbert Xu return 1; 1204d5422efeSHerbert Xu } 1205d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1206d5422efeSHerbert Xu struct sk_buff *skb) 1207d5422efeSHerbert Xu { 1208d5422efeSHerbert Xu return 1; 1209d5422efeSHerbert Xu } 1210e4c17216SPaul Moore static inline void xfrm_garbage_collect(struct net *net) 1211e4c17216SPaul Moore { 1212e4c17216SPaul Moore } 12131da177e4SLinus Torvalds #endif 12141da177e4SLinus Torvalds 12151da177e4SLinus Torvalds static __inline__ 1216e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) 12171da177e4SLinus Torvalds { 12181da177e4SLinus Torvalds switch (family){ 12191da177e4SLinus Torvalds case AF_INET: 12207e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.daddr; 12211da177e4SLinus Torvalds case AF_INET6: 12227e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.daddr; 12231da177e4SLinus Torvalds } 12241da177e4SLinus Torvalds return NULL; 12251da177e4SLinus Torvalds } 12261da177e4SLinus Torvalds 12271da177e4SLinus Torvalds static __inline__ 1228e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) 12291da177e4SLinus Torvalds { 12301da177e4SLinus Torvalds switch (family){ 12311da177e4SLinus Torvalds case AF_INET: 12327e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.saddr; 12331da177e4SLinus Torvalds case AF_INET6: 12347e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.saddr; 12351da177e4SLinus Torvalds } 12361da177e4SLinus Torvalds return NULL; 12371da177e4SLinus Torvalds } 12381da177e4SLinus Torvalds 12399bb182a7SYOSHIFUJI Hideaki static __inline__ 1240e8a4e377SDavid S. Miller void xfrm_flowi_addr_get(const struct flowi *fl, 12419bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 12429bb182a7SYOSHIFUJI Hideaki unsigned short family) 12439bb182a7SYOSHIFUJI Hideaki { 12449bb182a7SYOSHIFUJI Hideaki switch(family) { 12459bb182a7SYOSHIFUJI Hideaki case AF_INET: 12467e1dc7b6SDavid S. Miller memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); 12477e1dc7b6SDavid S. Miller memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); 12489bb182a7SYOSHIFUJI Hideaki break; 12499bb182a7SYOSHIFUJI Hideaki case AF_INET6: 125015e318bdSJiri Benc saddr->in6 = fl->u.ip6.saddr; 125115e318bdSJiri Benc daddr->in6 = fl->u.ip6.daddr; 12529bb182a7SYOSHIFUJI Hideaki break; 12539bb182a7SYOSHIFUJI Hideaki } 12549bb182a7SYOSHIFUJI Hideaki } 12559bb182a7SYOSHIFUJI Hideaki 12561da177e4SLinus Torvalds static __inline__ int 1257f8848067SDavid S. Miller __xfrm4_state_addr_check(const struct xfrm_state *x, 1258f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 12591da177e4SLinus Torvalds { 12601da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 12611da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 12621da177e4SLinus Torvalds return 1; 12631da177e4SLinus Torvalds return 0; 12641da177e4SLinus Torvalds } 12651da177e4SLinus Torvalds 12661da177e4SLinus Torvalds static __inline__ int 1267f8848067SDavid S. Miller __xfrm6_state_addr_check(const struct xfrm_state *x, 1268f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 12691da177e4SLinus Torvalds { 1270ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 1271ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || 12721da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 12731da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 12741da177e4SLinus Torvalds return 1; 12751da177e4SLinus Torvalds return 0; 12761da177e4SLinus Torvalds } 12771da177e4SLinus Torvalds 12781da177e4SLinus Torvalds static __inline__ int 1279f8848067SDavid S. Miller xfrm_state_addr_check(const struct xfrm_state *x, 1280f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr, 12811da177e4SLinus Torvalds unsigned short family) 12821da177e4SLinus Torvalds { 12831da177e4SLinus Torvalds switch (family) { 12841da177e4SLinus Torvalds case AF_INET: 12851da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 12861da177e4SLinus Torvalds case AF_INET6: 12871da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 12881da177e4SLinus Torvalds } 12891da177e4SLinus Torvalds return 0; 12901da177e4SLinus Torvalds } 12911da177e4SLinus Torvalds 1292e53820deSMasahide NAKAMURA static __inline__ int 1293f8848067SDavid S. Miller xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, 1294e53820deSMasahide NAKAMURA unsigned short family) 1295e53820deSMasahide NAKAMURA { 1296e53820deSMasahide NAKAMURA switch (family) { 1297e53820deSMasahide NAKAMURA case AF_INET: 1298e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 12997e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.daddr, 13007e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.saddr); 1301e53820deSMasahide NAKAMURA case AF_INET6: 1302e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 13037e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.daddr, 13047e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.saddr); 1305e53820deSMasahide NAKAMURA } 1306e53820deSMasahide NAKAMURA return 0; 1307e53820deSMasahide NAKAMURA } 1308e53820deSMasahide NAKAMURA 1309f8848067SDavid S. Miller static inline int xfrm_state_kern(const struct xfrm_state *x) 13101da177e4SLinus Torvalds { 13111da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 13121da177e4SLinus Torvalds } 13131da177e4SLinus Torvalds 13145794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 13155794708fSMasahide NAKAMURA { 1316dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1317dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1318dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1319dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 13205794708fSMasahide NAKAMURA } 13215794708fSMasahide NAKAMURA 13221da177e4SLinus Torvalds /* 13231da177e4SLinus Torvalds * xfrm algorithm information 13241da177e4SLinus Torvalds */ 13251a6509d9SHerbert Xu struct xfrm_algo_aead_info { 1326165ecc63SHerbert Xu char *geniv; 13271a6509d9SHerbert Xu u16 icv_truncbits; 13281a6509d9SHerbert Xu }; 13291a6509d9SHerbert Xu 13301da177e4SLinus Torvalds struct xfrm_algo_auth_info { 13311da177e4SLinus Torvalds u16 icv_truncbits; 13321da177e4SLinus Torvalds u16 icv_fullbits; 13331da177e4SLinus Torvalds }; 13341da177e4SLinus Torvalds 13351da177e4SLinus Torvalds struct xfrm_algo_encr_info { 1336165ecc63SHerbert Xu char *geniv; 13371da177e4SLinus Torvalds u16 blockbits; 13381da177e4SLinus Torvalds u16 defkeybits; 13391da177e4SLinus Torvalds }; 13401da177e4SLinus Torvalds 13411da177e4SLinus Torvalds struct xfrm_algo_comp_info { 13421da177e4SLinus Torvalds u16 threshold; 13431da177e4SLinus Torvalds }; 13441da177e4SLinus Torvalds 13451da177e4SLinus Torvalds struct xfrm_algo_desc { 13461da177e4SLinus Torvalds char *name; 134704ff1260SHerbert Xu char *compat; 13481da177e4SLinus Torvalds u8 available:1; 13497e50f84cSJussi Kivilinna u8 pfkey_supported:1; 13501da177e4SLinus Torvalds union { 13511a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 13521da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 13531da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 13541da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 13551da177e4SLinus Torvalds } uinfo; 13561da177e4SLinus Torvalds struct sadb_alg desc; 13571da177e4SLinus Torvalds }; 13581da177e4SLinus Torvalds 13593328715eSSteffen Klassert /* XFRM protocol handlers. */ 13603328715eSSteffen Klassert struct xfrm4_protocol { 13613328715eSSteffen Klassert int (*handler)(struct sk_buff *skb); 13623328715eSSteffen Klassert int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, 13633328715eSSteffen Klassert int encap_type); 13643328715eSSteffen Klassert int (*cb_handler)(struct sk_buff *skb, int err); 13653328715eSSteffen Klassert int (*err_handler)(struct sk_buff *skb, u32 info); 13663328715eSSteffen Klassert 13673328715eSSteffen Klassert struct xfrm4_protocol __rcu *next; 13683328715eSSteffen Klassert int priority; 13693328715eSSteffen Klassert }; 13703328715eSSteffen Klassert 13717e14ea15SSteffen Klassert struct xfrm6_protocol { 13727e14ea15SSteffen Klassert int (*handler)(struct sk_buff *skb); 13737e14ea15SSteffen Klassert int (*cb_handler)(struct sk_buff *skb, int err); 13747e14ea15SSteffen Klassert int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 13757e14ea15SSteffen Klassert u8 type, u8 code, int offset, __be32 info); 13767e14ea15SSteffen Klassert 13777e14ea15SSteffen Klassert struct xfrm6_protocol __rcu *next; 13787e14ea15SSteffen Klassert int priority; 13797e14ea15SSteffen Klassert }; 13807e14ea15SSteffen Klassert 13811da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 13821da177e4SLinus Torvalds struct xfrm_tunnel { 13831da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1384a6337463Sjamal int (*err_handler)(struct sk_buff *skb, u32 info); 1385d2acc347SHerbert Xu 1386b33eab08SEric Dumazet struct xfrm_tunnel __rcu *next; 1387d2acc347SHerbert Xu int priority; 13881da177e4SLinus Torvalds }; 13891da177e4SLinus Torvalds 13901da177e4SLinus Torvalds struct xfrm6_tunnel { 1391d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1392d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 1393d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info); 13946f0bcf15SEric Dumazet struct xfrm6_tunnel __rcu *next; 1395d2acc347SHerbert Xu int priority; 13961da177e4SLinus Torvalds }; 13971da177e4SLinus Torvalds 1398d511337aSJoe Perches void xfrm_init(void); 1399d511337aSJoe Perches void xfrm4_init(void); 1400d511337aSJoe Perches int xfrm_state_init(struct net *net); 1401d511337aSJoe Perches void xfrm_state_fini(struct net *net); 1402d511337aSJoe Perches void xfrm4_state_init(void); 14032f32b51bSSteffen Klassert void xfrm4_protocol_init(void); 1404c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1405d511337aSJoe Perches int xfrm6_init(void); 1406d511337aSJoe Perches void xfrm6_fini(void); 1407d511337aSJoe Perches int xfrm6_state_init(void); 1408d511337aSJoe Perches void xfrm6_state_fini(void); 14097e14ea15SSteffen Klassert int xfrm6_protocol_init(void); 14107e14ea15SSteffen Klassert void xfrm6_protocol_fini(void); 1411c35b7e72SDaniel Lezcano #else 1412c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1413c35b7e72SDaniel Lezcano { 1414c35b7e72SDaniel Lezcano return 0; 1415c35b7e72SDaniel Lezcano } 1416c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1417c35b7e72SDaniel Lezcano { 1418c35b7e72SDaniel Lezcano ; 1419c35b7e72SDaniel Lezcano } 1420c35b7e72SDaniel Lezcano #endif 14211da177e4SLinus Torvalds 1422558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1423d511337aSJoe Perches int xfrm_proc_init(struct net *net); 1424d511337aSJoe Perches void xfrm_proc_fini(struct net *net); 1425558f82efSMasahide NAKAMURA #endif 1426558f82efSMasahide NAKAMURA 1427d511337aSJoe Perches int xfrm_sysctl_init(struct net *net); 1428b27aeadbSAlexey Dobriyan #ifdef CONFIG_SYSCTL 1429d511337aSJoe Perches void xfrm_sysctl_fini(struct net *net); 1430b27aeadbSAlexey Dobriyan #else 1431b27aeadbSAlexey Dobriyan static inline void xfrm_sysctl_fini(struct net *net) 1432b27aeadbSAlexey Dobriyan { 1433b27aeadbSAlexey Dobriyan } 1434b27aeadbSAlexey Dobriyan #endif 1435b27aeadbSAlexey Dobriyan 1436d3623099SNicolas Dichtel void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, 1437870a2df4SNicolas Dichtel struct xfrm_address_filter *filter); 1438d511337aSJoe Perches int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 14394c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1440283bc9f3SFan Du void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); 1441d511337aSJoe Perches struct xfrm_state *xfrm_state_alloc(struct net *net); 1442d511337aSJoe Perches struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, 144333765d06SDavid S. Miller const xfrm_address_t *saddr, 1444b520e9f6SDavid S. Miller const struct flowi *fl, 1445b520e9f6SDavid S. Miller struct xfrm_tmpl *tmpl, 14461da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 14471da177e4SLinus Torvalds unsigned short family); 1448d511337aSJoe Perches struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, 14495447c5e4SAlexey Dobriyan xfrm_address_t *daddr, 1450628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1451628529b6SJamal Hadi Salim unsigned short family, 1452628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 1453c454997eSFan Du struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, 1454c454997eSFan Du unsigned short family); 1455d511337aSJoe Perches int xfrm_state_check_expire(struct xfrm_state *x); 1456d511337aSJoe Perches void xfrm_state_insert(struct xfrm_state *x); 1457d511337aSJoe Perches int xfrm_state_add(struct xfrm_state *x); 1458d511337aSJoe Perches int xfrm_state_update(struct xfrm_state *x); 1459d511337aSJoe Perches struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, 1460a70486f0SDavid S. Miller const xfrm_address_t *daddr, __be32 spi, 1461bd55775cSJamal Hadi Salim u8 proto, unsigned short family); 1462d511337aSJoe Perches struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, 1463a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1464a70486f0SDavid S. Miller const xfrm_address_t *saddr, 1465bd55775cSJamal Hadi Salim u8 proto, 1466bd55775cSJamal Hadi Salim unsigned short family); 146741a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 1468d511337aSJoe Perches int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, 1469283bc9f3SFan Du unsigned short family, struct net *net); 1470d511337aSJoe Perches int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, 1471d511337aSJoe Perches unsigned short family); 147241a49cc3SMasahide NAKAMURA #else 147341a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 1474283bc9f3SFan Du int n, unsigned short family, struct net *net) 147541a49cc3SMasahide NAKAMURA { 147641a49cc3SMasahide NAKAMURA return -ENOSYS; 147741a49cc3SMasahide NAKAMURA } 147841a49cc3SMasahide NAKAMURA 147941a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 148041a49cc3SMasahide NAKAMURA int n, unsigned short family) 148141a49cc3SMasahide NAKAMURA { 148241a49cc3SMasahide NAKAMURA return -ENOSYS; 148341a49cc3SMasahide NAKAMURA } 148441a49cc3SMasahide NAKAMURA #endif 1485af11e316SJamal Hadi Salim 1486af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1487af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1488af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1489af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1490af11e316SJamal Hadi Salim }; 1491af11e316SJamal Hadi Salim 14925a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 14935a6d3416SJamal Hadi Salim u32 incnt; 14945a6d3416SJamal Hadi Salim u32 outcnt; 14955a6d3416SJamal Hadi Salim u32 fwdcnt; 14965a6d3416SJamal Hadi Salim u32 inscnt; 14975a6d3416SJamal Hadi Salim u32 outscnt; 14985a6d3416SJamal Hadi Salim u32 fwdscnt; 14995a6d3416SJamal Hadi Salim u32 spdhcnt; 15005a6d3416SJamal Hadi Salim u32 spdhmcnt; 15015a6d3416SJamal Hadi Salim }; 15025a6d3416SJamal Hadi Salim 1503d511337aSJoe Perches struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); 1504d511337aSJoe Perches int xfrm_state_delete(struct xfrm_state *x); 15052e71029eSTetsuo Handa int xfrm_state_flush(struct net *net, u8 proto, bool task_valid); 1506d511337aSJoe Perches void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); 1507d511337aSJoe Perches void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); 1508d511337aSJoe Perches u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); 1509d511337aSJoe Perches int xfrm_init_replay(struct xfrm_state *x); 1510d511337aSJoe Perches int xfrm_state_mtu(struct xfrm_state *x, int mtu); 1511d511337aSJoe Perches int __xfrm_init_state(struct xfrm_state *x, bool init_replay); 1512d511337aSJoe Perches int xfrm_init_state(struct xfrm_state *x); 1513d511337aSJoe Perches int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1514d511337aSJoe Perches int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); 1515d511337aSJoe Perches int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1516d511337aSJoe Perches int xfrm_output_resume(struct sk_buff *skb, int err); 15177026b1ddSDavid Miller int xfrm_output(struct sock *sk, struct sk_buff *skb); 1518d511337aSJoe Perches int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 1519d511337aSJoe Perches void xfrm_local_error(struct sk_buff *skb, int mtu); 1520d511337aSJoe Perches int xfrm4_extract_header(struct sk_buff *skb); 1521d511337aSJoe Perches int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1522d511337aSJoe Perches int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1523716062fdSHerbert Xu int encap_type); 1524d511337aSJoe Perches int xfrm4_transport_finish(struct sk_buff *skb, int async); 1525d511337aSJoe Perches int xfrm4_rcv(struct sk_buff *skb); 1526c4541b41SHerbert Xu 1527c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1528c4541b41SHerbert Xu { 152970be6c91SSteffen Klassert XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; 15303328715eSSteffen Klassert XFRM_SPI_SKB_CB(skb)->family = AF_INET; 15313328715eSSteffen Klassert XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); 15323328715eSSteffen Klassert return xfrm_input(skb, nexthdr, spi, 0); 1533c4541b41SHerbert Xu } 1534c4541b41SHerbert Xu 1535d511337aSJoe Perches int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 1536d511337aSJoe Perches int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 1537ede2059dSEric W. Biederman int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb); 15387026b1ddSDavid Miller int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb); 15393328715eSSteffen Klassert int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err); 15403328715eSSteffen Klassert int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); 15413328715eSSteffen Klassert int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol); 1542d511337aSJoe Perches int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1543d511337aSJoe Perches int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 1544d511337aSJoe Perches void xfrm4_local_error(struct sk_buff *skb, u32 mtu); 1545d511337aSJoe Perches int xfrm6_extract_header(struct sk_buff *skb); 1546d511337aSJoe Perches int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1547d511337aSJoe Perches int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1548d511337aSJoe Perches int xfrm6_transport_finish(struct sk_buff *skb, int async); 1549d511337aSJoe Perches int xfrm6_rcv(struct sk_buff *skb); 1550d511337aSJoe Perches int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1551fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 15527b77d161SDavid S. Miller void xfrm6_local_error(struct sk_buff *skb, u32 mtu); 15537e14ea15SSteffen Klassert int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err); 15547e14ea15SSteffen Klassert int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol); 15557e14ea15SSteffen Klassert int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol); 1556d511337aSJoe Perches int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 15577b77d161SDavid S. Miller int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 1558d511337aSJoe Perches __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); 1559d511337aSJoe Perches __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); 1560d511337aSJoe Perches int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 1561d511337aSJoe Perches int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 1562ede2059dSEric W. Biederman int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb); 15637026b1ddSDavid Miller int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb); 1564d511337aSJoe Perches int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1565aee5adb4SMasahide NAKAMURA u8 **prevhdr); 15661da177e4SLinus Torvalds 15671da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1568d511337aSJoe Perches int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 1569d511337aSJoe Perches int xfrm_user_policy(struct sock *sk, int optname, 1570d511337aSJoe Perches u8 __user *optval, int optlen); 15711da177e4SLinus Torvalds #else 15721da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 15731da177e4SLinus Torvalds { 15741da177e4SLinus Torvalds return -ENOPROTOOPT; 15751da177e4SLinus Torvalds } 15761da177e4SLinus Torvalds 1577067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 15781da177e4SLinus Torvalds { 15791da177e4SLinus Torvalds /* should not happen */ 15801da177e4SLinus Torvalds kfree_skb(skb); 15811da177e4SLinus Torvalds return 0; 15821da177e4SLinus Torvalds } 15831da177e4SLinus Torvalds #endif 15841da177e4SLinus Torvalds 15850331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 15864c563f76STimo Teras 1587d511337aSJoe Perches void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 1588d511337aSJoe Perches int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, 1589d511337aSJoe Perches int (*func)(struct xfrm_policy *, int, int, void*), 1590d511337aSJoe Perches void *); 1591283bc9f3SFan Du void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); 15921da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 15938ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, 15948ca2e93bSJamal Hadi Salim u8 type, int dir, 15954e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1596ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1597ef41aaa0SEric Paris int *err); 1598d511337aSJoe Perches struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, 1599d511337aSJoe Perches u32 id, int delete, int *err); 16002e71029eSTetsuo Handa int xfrm_policy_flush(struct net *net, u8 type, bool task_valid); 1601880a6fabSChristophe Gouault void xfrm_policy_hash_rebuild(struct net *net); 16021da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1603776e9dd9SFan Du int verify_spi_info(u8 proto, u32 min, u32 max); 1604d511337aSJoe Perches int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 1605e473fcb4SMathias Krause struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, 1606bd55775cSJamal Hadi Salim u8 mode, u32 reqid, u8 proto, 1607a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1608a70486f0SDavid S. Miller const xfrm_address_t *saddr, int create, 1609bd55775cSJamal Hadi Salim unsigned short family); 1610d511337aSJoe Perches int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 16111da177e4SLinus Torvalds 161280c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1613d511337aSJoe Perches int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 1614183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_bundles, 1615183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 1616283bc9f3SFan Du struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net); 1617d511337aSJoe Perches struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, 161880c9abaaSShinta Sugimoto struct xfrm_migrate *m); 1619d511337aSJoe Perches int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 162013c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 16218d549c4fSFan Du struct xfrm_kmaddress *k, struct net *net); 162280c9abaaSShinta Sugimoto #endif 162380c9abaaSShinta Sugimoto 1624d511337aSJoe Perches int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 1625d511337aSJoe Perches void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); 1626d511337aSJoe Perches int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, 1627d511337aSJoe Perches xfrm_address_t *addr); 16281da177e4SLinus Torvalds 1629d511337aSJoe Perches void xfrm_input_init(void); 1630d511337aSJoe Perches int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 16311da177e4SLinus Torvalds 1632d511337aSJoe Perches void xfrm_probe_algs(void); 1633d511337aSJoe Perches int xfrm_count_pfkey_auth_supported(void); 1634d511337aSJoe Perches int xfrm_count_pfkey_enc_supported(void); 1635d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 1636d511337aSJoe Perches struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 1637d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 1638d511337aSJoe Perches struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 1639d511337aSJoe Perches struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 1640d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); 1641d511337aSJoe Perches struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); 1642d511337aSJoe Perches struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); 1643d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, 16441a6509d9SHerbert Xu int probe); 16451da177e4SLinus Torvalds 1646ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 static inline bool xfrm6_addr_equal(const xfrm_address_t *a, 1647ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 const xfrm_address_t *b) 1648ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 { 1649ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 return ipv6_addr_equal((const struct in6_addr *)a, 1650ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 (const struct in6_addr *)b); 1651ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 } 1652ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 165370e94e66SYOSHIFUJI Hideaki / 吉藤英明 static inline bool xfrm_addr_equal(const xfrm_address_t *a, 165470e94e66SYOSHIFUJI Hideaki / 吉藤英明 const xfrm_address_t *b, 165570e94e66SYOSHIFUJI Hideaki / 吉藤英明 sa_family_t family) 165670e94e66SYOSHIFUJI Hideaki / 吉藤英明 { 165770e94e66SYOSHIFUJI Hideaki / 吉藤英明 switch (family) { 165870e94e66SYOSHIFUJI Hideaki / 吉藤英明 default: 165970e94e66SYOSHIFUJI Hideaki / 吉藤英明 case AF_INET: 166070e94e66SYOSHIFUJI Hideaki / 吉藤英明 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; 166170e94e66SYOSHIFUJI Hideaki / 吉藤英明 case AF_INET6: 166270e94e66SYOSHIFUJI Hideaki / 吉藤英明 return xfrm6_addr_equal(a, b); 166370e94e66SYOSHIFUJI Hideaki / 吉藤英明 } 166470e94e66SYOSHIFUJI Hideaki / 吉藤英明 } 166570e94e66SYOSHIFUJI Hideaki / 吉藤英明 166677d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 166777d8d7a6SHerbert Xu { 166877d8d7a6SHerbert Xu return index & 7; 166977d8d7a6SHerbert Xu } 167077d8d7a6SHerbert Xu 1671a6483b79SAlexey Dobriyan #ifdef CONFIG_XFRM 1672a6483b79SAlexey Dobriyan static inline int xfrm_aevent_is_on(struct net *net) 1673f8cd5488SJamal Hadi Salim { 1674be33690dSPatrick McHardy struct sock *nlsk; 1675be33690dSPatrick McHardy int ret = 0; 1676be33690dSPatrick McHardy 1677be33690dSPatrick McHardy rcu_read_lock(); 1678a6483b79SAlexey Dobriyan nlsk = rcu_dereference(net->xfrm.nlsk); 1679be33690dSPatrick McHardy if (nlsk) 1680be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1681be33690dSPatrick McHardy rcu_read_unlock(); 1682be33690dSPatrick McHardy return ret; 1683f8cd5488SJamal Hadi Salim } 16840f24558eSHoria Geanta 16850f24558eSHoria Geanta static inline int xfrm_acquire_is_on(struct net *net) 16860f24558eSHoria Geanta { 16870f24558eSHoria Geanta struct sock *nlsk; 16880f24558eSHoria Geanta int ret = 0; 16890f24558eSHoria Geanta 16900f24558eSHoria Geanta rcu_read_lock(); 16910f24558eSHoria Geanta nlsk = rcu_dereference(net->xfrm.nlsk); 16920f24558eSHoria Geanta if (nlsk) 16930f24558eSHoria Geanta ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE); 16940f24558eSHoria Geanta rcu_read_unlock(); 16950f24558eSHoria Geanta 16960f24558eSHoria Geanta return ret; 16970f24558eSHoria Geanta } 1698a6483b79SAlexey Dobriyan #endif 1699f8cd5488SJamal Hadi Salim 1700ee5c2317SSteffen Klassert static inline int aead_len(struct xfrm_algo_aead *alg) 1701ee5c2317SSteffen Klassert { 1702ee5c2317SSteffen Klassert return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 1703ee5c2317SSteffen Klassert } 1704ee5c2317SSteffen Klassert 170585158621SDavid S. Miller static inline int xfrm_alg_len(const struct xfrm_algo *alg) 17060f99be0dSEric Dumazet { 17070f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 17080f99be0dSEric Dumazet } 17090f99be0dSEric Dumazet 171085158621SDavid S. Miller static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) 17114447bb33SMartin Willi { 17124447bb33SMartin Willi return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 17134447bb33SMartin Willi } 17144447bb33SMartin Willi 17159736acf3SSteffen Klassert static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) 17169736acf3SSteffen Klassert { 17179736acf3SSteffen Klassert return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); 17189736acf3SSteffen Klassert } 17199736acf3SSteffen Klassert 172080c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1721af2f464eSSteffen Klassert static inline int xfrm_replay_clone(struct xfrm_state *x, 1722af2f464eSSteffen Klassert struct xfrm_state *orig) 1723af2f464eSSteffen Klassert { 1724af2f464eSSteffen Klassert x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), 1725af2f464eSSteffen Klassert GFP_KERNEL); 1726af2f464eSSteffen Klassert if (!x->replay_esn) 1727af2f464eSSteffen Klassert return -ENOMEM; 1728af2f464eSSteffen Klassert 1729af2f464eSSteffen Klassert x->replay_esn->bmp_len = orig->replay_esn->bmp_len; 1730af2f464eSSteffen Klassert x->replay_esn->replay_window = orig->replay_esn->replay_window; 1731af2f464eSSteffen Klassert 1732af2f464eSSteffen Klassert x->preplay_esn = kmemdup(x->replay_esn, 1733af2f464eSSteffen Klassert xfrm_replay_state_esn_len(x->replay_esn), 1734af2f464eSSteffen Klassert GFP_KERNEL); 1735af2f464eSSteffen Klassert if (!x->preplay_esn) { 1736af2f464eSSteffen Klassert kfree(x->replay_esn); 1737af2f464eSSteffen Klassert return -ENOMEM; 1738af2f464eSSteffen Klassert } 1739af2f464eSSteffen Klassert 1740af2f464eSSteffen Klassert return 0; 1741af2f464eSSteffen Klassert } 1742af2f464eSSteffen Klassert 1743ee5c2317SSteffen Klassert static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig) 1744ee5c2317SSteffen Klassert { 1745ee5c2317SSteffen Klassert return kmemdup(orig, aead_len(orig), GFP_KERNEL); 1746ee5c2317SSteffen Klassert } 1747ee5c2317SSteffen Klassert 1748ee5c2317SSteffen Klassert 174980c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 175080c9abaaSShinta Sugimoto { 17510f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 175280c9abaaSShinta Sugimoto } 175380c9abaaSShinta Sugimoto 17544447bb33SMartin Willi static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) 17554447bb33SMartin Willi { 17564447bb33SMartin Willi return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); 17574447bb33SMartin Willi } 17584447bb33SMartin Willi 175980c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 176080c9abaaSShinta Sugimoto { 176180c9abaaSShinta Sugimoto int i; 176280c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 176380c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 176480c9abaaSShinta Sugimoto } 176580c9abaaSShinta Sugimoto 176680c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 176780c9abaaSShinta Sugimoto { 176880c9abaaSShinta Sugimoto int i; 176980c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 177080c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 177180c9abaaSShinta Sugimoto } 177280c9abaaSShinta Sugimoto #endif 1773f8cd5488SJamal Hadi Salim 1774def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 177500501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 177600501121SHerbert Xu { 177700501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 177800501121SHerbert Xu } 1779def8b4faSAlexey Dobriyan #endif 178000501121SHerbert Xu 1781bf825f81SJamal Hadi Salim static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) 1782bf825f81SJamal Hadi Salim { 1783bf825f81SJamal Hadi Salim if (attrs[XFRMA_MARK]) 17844efd7e83SAndreas Steffen memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); 1785bf825f81SJamal Hadi Salim else 1786bf825f81SJamal Hadi Salim m->v = m->m = 0; 1787bf825f81SJamal Hadi Salim 1788bf825f81SJamal Hadi Salim return m->v & m->m; 1789bf825f81SJamal Hadi Salim } 1790bf825f81SJamal Hadi Salim 1791e3dfa389SDavid S. Miller static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) 1792bf825f81SJamal Hadi Salim { 17931d1e34ddSDavid S. Miller int ret = 0; 1794bf825f81SJamal Hadi Salim 17951d1e34ddSDavid S. Miller if (m->m | m->v) 17961d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); 17971d1e34ddSDavid S. Miller return ret; 1798bf825f81SJamal Hadi Salim } 1799bf825f81SJamal Hadi Salim 180070be6c91SSteffen Klassert static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, 180170be6c91SSteffen Klassert unsigned int family) 180270be6c91SSteffen Klassert { 180370be6c91SSteffen Klassert bool tunnel = false; 180470be6c91SSteffen Klassert 180570be6c91SSteffen Klassert switch(family) { 180670be6c91SSteffen Klassert case AF_INET: 180770be6c91SSteffen Klassert if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) 180870be6c91SSteffen Klassert tunnel = true; 180970be6c91SSteffen Klassert break; 181070be6c91SSteffen Klassert case AF_INET6: 181170be6c91SSteffen Klassert if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) 181270be6c91SSteffen Klassert tunnel = true; 181370be6c91SSteffen Klassert break; 181470be6c91SSteffen Klassert } 181570be6c91SSteffen Klassert if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL)) 181670be6c91SSteffen Klassert return -EINVAL; 181770be6c91SSteffen Klassert 181870be6c91SSteffen Klassert return 0; 181970be6c91SSteffen Klassert } 18201da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1821