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 { 129673c09beSAlexey Dobriyan #ifdef CONFIG_NET_NS 130673c09beSAlexey Dobriyan struct net *xs_net; 131673c09beSAlexey Dobriyan #endif 132abb81c4fSHerbert Xu union { 13312a169e7SHerbert Xu struct hlist_node gclist; 1348f126e37SDavid S. Miller struct hlist_node bydst; 135abb81c4fSHerbert Xu }; 1368f126e37SDavid S. Miller struct hlist_node bysrc; 1378f126e37SDavid S. Miller struct hlist_node byspi; 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds atomic_t refcnt; 1401da177e4SLinus Torvalds spinlock_t lock; 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds struct xfrm_id id; 1431da177e4SLinus Torvalds struct xfrm_selector sel; 144bf825f81SJamal Hadi Salim struct xfrm_mark mark; 14535d2856bSMartin Willi u32 tfcpad; 1461da177e4SLinus Torvalds 1479d4a706dSDavid S. Miller u32 genid; 1489d4a706dSDavid S. Miller 14912a169e7SHerbert Xu /* Key manager bits */ 15012a169e7SHerbert Xu struct xfrm_state_walk km; 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds /* Parameters of this state. */ 1531da177e4SLinus Torvalds struct { 1541da177e4SLinus Torvalds u32 reqid; 1551da177e4SLinus Torvalds u8 mode; 1561da177e4SLinus Torvalds u8 replay_window; 1571da177e4SLinus Torvalds u8 aalgo, ealgo, calgo; 1581da177e4SLinus Torvalds u8 flags; 1591da177e4SLinus Torvalds u16 family; 1601da177e4SLinus Torvalds xfrm_address_t saddr; 1611da177e4SLinus Torvalds int header_len; 1621da177e4SLinus Torvalds int trailer_len; 163a947b0a9SNicolas Dichtel u32 extra_flags; 1641da177e4SLinus Torvalds } props; 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds /* Data for transformer */ 1694447bb33SMartin Willi struct xfrm_algo_auth *aalg; 1701da177e4SLinus Torvalds struct xfrm_algo *ealg; 1711da177e4SLinus Torvalds struct xfrm_algo *calg; 1721a6509d9SHerbert Xu struct xfrm_algo_aead *aead; 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds /* Data for encapsulator */ 1751da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 1761da177e4SLinus Torvalds 177060f02a3SNoriaki TAKAMIYA /* Data for care-of address */ 178060f02a3SNoriaki TAKAMIYA xfrm_address_t *coaddr; 179060f02a3SNoriaki TAKAMIYA 1801da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1811da177e4SLinus Torvalds struct xfrm_state *tunnel; 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1841da177e4SLinus Torvalds atomic_t tunnel_users; 1851da177e4SLinus Torvalds 1861da177e4SLinus Torvalds /* State for replay detection */ 1871da177e4SLinus Torvalds struct xfrm_replay_state replay; 1889736acf3SSteffen Klassert struct xfrm_replay_state_esn *replay_esn; 1891da177e4SLinus Torvalds 190f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 191f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 1929736acf3SSteffen Klassert struct xfrm_replay_state_esn *preplay_esn; 193f8cd5488SJamal Hadi Salim 1949fdc4883SSteffen Klassert /* The functions for replay detection. */ 1959fdc4883SSteffen Klassert struct xfrm_replay *repl; 1969fdc4883SSteffen Klassert 1972717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 1982717096aSJamal Hadi Salim * moment 1992717096aSJamal Hadi Salim */ 2002717096aSJamal Hadi Salim u32 xflags; 2012717096aSJamal Hadi Salim 202f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 203f8cd5488SJamal Hadi Salim u32 replay_maxage; 204f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 205f8cd5488SJamal Hadi Salim 206f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 207f8cd5488SJamal Hadi Salim struct timer_list rtimer; 208f8cd5488SJamal Hadi Salim 2091da177e4SLinus Torvalds /* Statistics */ 2101da177e4SLinus Torvalds struct xfrm_stats stats; 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 2139e0d57fdSYury Polyanskiy struct tasklet_hrtimer mtimer; 2141da177e4SLinus Torvalds 215e3c0d047SFan Du /* used to fix curlft->add_time when changing date */ 216e3c0d047SFan Du long saved_tmo; 217e3c0d047SFan Du 2189afaca05SMasahide NAKAMURA /* Last used time */ 219d26f3984SHerbert Xu unsigned long lastused; 2209afaca05SMasahide NAKAMURA 2211da177e4SLinus Torvalds /* Reference to data common to all the instances of this 2221da177e4SLinus Torvalds * transformer. */ 223533cb5b0SEric Dumazet const struct xfrm_type *type; 22413996378SHerbert Xu struct xfrm_mode *inner_mode; 225df9dcb45SKazunori MIYAZAWA struct xfrm_mode *inner_mode_iaf; 22613996378SHerbert Xu struct xfrm_mode *outer_mode; 2271da177e4SLinus Torvalds 228df71837dSTrent Jaeger /* Security context */ 229df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 230df71837dSTrent Jaeger 2311da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 2321da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 2331da177e4SLinus Torvalds void *data; 2341da177e4SLinus Torvalds }; 2351da177e4SLinus Torvalds 236673c09beSAlexey Dobriyan static inline struct net *xs_net(struct xfrm_state *x) 237673c09beSAlexey Dobriyan { 238673c09beSAlexey Dobriyan return read_pnet(&x->xs_net); 239673c09beSAlexey Dobriyan } 240673c09beSAlexey Dobriyan 2412717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2422717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 243e3c0d047SFan Du #define XFRM_SOFT_EXPIRE 2 2442717096aSJamal Hadi Salim 2451da177e4SLinus Torvalds enum { 2461da177e4SLinus Torvalds XFRM_STATE_VOID, 2471da177e4SLinus Torvalds XFRM_STATE_ACQ, 2481da177e4SLinus Torvalds XFRM_STATE_VALID, 2491da177e4SLinus Torvalds XFRM_STATE_ERROR, 2501da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2511da177e4SLinus Torvalds XFRM_STATE_DEAD 2521da177e4SLinus Torvalds }; 2531da177e4SLinus Torvalds 25426b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 255fd2c3ef7SEric Dumazet struct km_event { 256bf08867fSHerbert Xu union { 257bf08867fSHerbert Xu u32 hard; 258bf08867fSHerbert Xu u32 proto; 259bf08867fSHerbert Xu u32 byid; 260f8cd5488SJamal Hadi Salim u32 aevent; 261f7b6983fSMasahide NAKAMURA u32 type; 262bf08867fSHerbert Xu } data; 263bf08867fSHerbert Xu 26426b15dadSJamal Hadi Salim u32 seq; 26515e47304SEric W. Biederman u32 portid; 26626b15dadSJamal Hadi Salim u32 event; 2677067802eSAlexey Dobriyan struct net *net; 26826b15dadSJamal Hadi Salim }; 26926b15dadSJamal Hadi Salim 2709fdc4883SSteffen Klassert struct xfrm_replay { 2719fdc4883SSteffen Klassert void (*advance)(struct xfrm_state *x, __be32 net_seq); 2729fdc4883SSteffen Klassert int (*check)(struct xfrm_state *x, 2739fdc4883SSteffen Klassert struct sk_buff *skb, 2749fdc4883SSteffen Klassert __be32 net_seq); 2753b59df46SSteffen Klassert int (*recheck)(struct xfrm_state *x, 2763b59df46SSteffen Klassert struct sk_buff *skb, 2773b59df46SSteffen Klassert __be32 net_seq); 2789fdc4883SSteffen Klassert void (*notify)(struct xfrm_state *x, int event); 2799fdc4883SSteffen Klassert int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); 2809fdc4883SSteffen Klassert }; 2819fdc4883SSteffen Klassert 28225ee3286SHerbert Xu struct net_device; 2831da177e4SLinus Torvalds struct xfrm_type; 2841da177e4SLinus Torvalds struct xfrm_dst; 2851da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2861da177e4SLinus Torvalds unsigned short family; 2871da177e4SLinus Torvalds struct dst_ops *dst_ops; 288ddcfd796SAlexey Dobriyan void (*garbage_collect)(struct net *net); 289c5b3cf46SAlexey Dobriyan struct dst_entry *(*dst_lookup)(struct net *net, int tos, 2905e6b930fSDavid S. Miller const xfrm_address_t *saddr, 2915e6b930fSDavid S. Miller const xfrm_address_t *daddr); 292fbda33b2SAlexey Dobriyan int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr); 2931da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 294d5422efeSHerbert Xu struct flowi *fl, 295d5422efeSHerbert Xu int reverse); 29605d84025SDavid S. Miller int (*get_tos)(const struct flowi *fl); 2979d7b0fc1SPatrick McHardy void (*init_dst)(struct net *net, 2989d7b0fc1SPatrick McHardy struct xfrm_dst *dst); 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); 336aad88724SEric Dumazet int (*output)(struct sock *sk, struct sk_buff *skb); 33743a4dea4SSteffen Klassert int (*output_finish)(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 { 5250331b1f3SAlexey Dobriyan #ifdef CONFIG_NET_NS 5260331b1f3SAlexey Dobriyan struct net *xp_net; 5270331b1f3SAlexey Dobriyan #endif 5282518c7c2SDavid S. Miller struct hlist_node bydst; 5292518c7c2SDavid S. Miller struct hlist_node byidx; 5301da177e4SLinus Torvalds 5311da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 5321da177e4SLinus Torvalds rwlock_t lock; 5331da177e4SLinus Torvalds atomic_t refcnt; 5341da177e4SLinus Torvalds struct timer_list timer; 5351da177e4SLinus Torvalds 536fe1a5f03STimo Teräs struct flow_cache_object flo; 53780c802f3STimo Teräs atomic_t genid; 5381da177e4SLinus Torvalds u32 priority; 5391da177e4SLinus Torvalds u32 index; 540bf825f81SJamal Hadi Salim struct xfrm_mark mark; 5411da177e4SLinus Torvalds struct xfrm_selector selector; 5421da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 5431da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 54412a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 545a0073fe1SSteffen Klassert struct xfrm_policy_queue polq; 54646ca5f5dSArnaldo Carvalho de Melo u8 type; 54746ca5f5dSArnaldo Carvalho de Melo u8 action; 54846ca5f5dSArnaldo Carvalho de Melo u8 flags; 54946ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 55012a169e7SHerbert Xu u16 family; 551df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 5521da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 5531da177e4SLinus Torvalds }; 5541da177e4SLinus Torvalds 55563eb23f5SDavid S. Miller static inline struct net *xp_net(const struct xfrm_policy *xp) 5560331b1f3SAlexey Dobriyan { 5570331b1f3SAlexey Dobriyan return read_pnet(&xp->xp_net); 5580331b1f3SAlexey Dobriyan } 5590331b1f3SAlexey Dobriyan 56013c1d189SArnaud Ebalard struct xfrm_kmaddress { 56113c1d189SArnaud Ebalard xfrm_address_t local; 56213c1d189SArnaud Ebalard xfrm_address_t remote; 56313c1d189SArnaud Ebalard u32 reserved; 56413c1d189SArnaud Ebalard u16 family; 56513c1d189SArnaud Ebalard }; 56613c1d189SArnaud Ebalard 56780c9abaaSShinta Sugimoto struct xfrm_migrate { 56880c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 56980c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 57080c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 57180c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 57280c9abaaSShinta Sugimoto u8 proto; 57380c9abaaSShinta Sugimoto u8 mode; 57480c9abaaSShinta Sugimoto u16 reserved; 57580c9abaaSShinta Sugimoto u32 reqid; 57680c9abaaSShinta Sugimoto u16 old_family; 57780c9abaaSShinta Sugimoto u16 new_family; 57880c9abaaSShinta Sugimoto }; 57980c9abaaSShinta Sugimoto 5801da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 581f8cd5488SJamal Hadi Salim /* what happened */ 582f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 583f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 584f8cd5488SJamal Hadi Salim 585f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 586f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 587f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 588f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 589f8cd5488SJamal Hadi Salim /* default seq threshold size */ 590f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 5911da177e4SLinus Torvalds 592fd2c3ef7SEric Dumazet struct xfrm_mgr { 5931da177e4SLinus Torvalds struct list_head list; 5941da177e4SLinus Torvalds char *id; 595214e005bSDavid S. Miller int (*notify)(struct xfrm_state *x, const struct km_event *c); 59665e0736bSFan Du int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); 597cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 5985d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 599214e005bSDavid S. Miller int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); 600db983c11SAlexey Dobriyan int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 601183cad12SDavid S. Miller int (*migrate)(const struct xfrm_selector *sel, 602183cad12SDavid S. Miller u8 dir, u8 type, 603183cad12SDavid S. Miller const struct xfrm_migrate *m, 604183cad12SDavid S. Miller int num_bundles, 605183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 6060f24558eSHoria Geanta bool (*is_alive)(const struct km_event *c); 6071da177e4SLinus Torvalds }; 6081da177e4SLinus Torvalds 609d511337aSJoe Perches int xfrm_register_km(struct xfrm_mgr *km); 610d511337aSJoe Perches int xfrm_unregister_km(struct xfrm_mgr *km); 6111da177e4SLinus Torvalds 61270be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb { 61370be6c91SSteffen Klassert union { 61470be6c91SSteffen Klassert struct inet_skb_parm h4; 61570be6c91SSteffen Klassert struct inet6_skb_parm h6; 61670be6c91SSteffen Klassert } header; 61770be6c91SSteffen Klassert 61870be6c91SSteffen Klassert union { 61970be6c91SSteffen Klassert struct ip_tunnel *ip4; 62070be6c91SSteffen Klassert struct ip6_tnl *ip6; 62170be6c91SSteffen Klassert } tunnel; 62270be6c91SSteffen Klassert }; 62370be6c91SSteffen Klassert 62470be6c91SSteffen Klassert #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) 62570be6c91SSteffen Klassert 626436a0a40SHerbert Xu /* 627436a0a40SHerbert Xu * This structure is used for the duration where packets are being 628436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 629436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 630436a0a40SHerbert Xu */ 631436a0a40SHerbert Xu struct xfrm_skb_cb { 63270be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb header; 633436a0a40SHerbert Xu 634436a0a40SHerbert Xu /* Sequence number for replay protection. */ 635b318e0e4SHerbert Xu union { 6361ce3644aSSteffen Klassert struct { 6371ce3644aSSteffen Klassert __u32 low; 6381ce3644aSSteffen Klassert __u32 hi; 6391ce3644aSSteffen Klassert } output; 6401ce3644aSSteffen Klassert struct { 6411ce3644aSSteffen Klassert __be32 low; 6421ce3644aSSteffen Klassert __be32 hi; 6431ce3644aSSteffen Klassert } input; 644b318e0e4SHerbert Xu } seq; 645436a0a40SHerbert Xu }; 646436a0a40SHerbert Xu 647436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 648436a0a40SHerbert Xu 64936cf9acfSHerbert Xu /* 65036cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 65136cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 65236cf9acfSHerbert Xu */ 65336cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 65470be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb header; 65536cf9acfSHerbert Xu 65636cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 65736cf9acfSHerbert Xu __be16 id; 65836cf9acfSHerbert Xu __be16 frag_off; 65936cf9acfSHerbert Xu 660732c8bd5SHerbert Xu /* IP header length (excluding options or extension headers). */ 661732c8bd5SHerbert Xu u8 ihl; 662732c8bd5SHerbert Xu 66336cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 66436cf9acfSHerbert Xu u8 tos; 66536cf9acfSHerbert Xu 66636cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 66736cf9acfSHerbert Xu u8 ttl; 66836cf9acfSHerbert Xu 66936cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 67036cf9acfSHerbert Xu u8 protocol; 67136cf9acfSHerbert Xu 672732c8bd5SHerbert Xu /* Option length for IPv4, zero for IPv6. */ 673732c8bd5SHerbert Xu u8 optlen; 674732c8bd5SHerbert Xu 67536cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 67636cf9acfSHerbert Xu u8 flow_lbl[3]; 67736cf9acfSHerbert Xu }; 67836cf9acfSHerbert Xu 67936cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 68036cf9acfSHerbert Xu 681716062fdSHerbert Xu /* 682716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 683716062fdSHerbert Xu * related information. 684716062fdSHerbert Xu */ 685716062fdSHerbert Xu struct xfrm_spi_skb_cb { 68670be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb header; 687716062fdSHerbert Xu 688716062fdSHerbert Xu unsigned int daddroff; 6892fcb45b6SHerbert Xu unsigned int family; 690716062fdSHerbert Xu }; 691716062fdSHerbert Xu 692716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 693716062fdSHerbert Xu 694c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 695afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 696ab5f5e8bSJoy Latten { 697ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 698ab5f5e8bSJoy Latten 699afeb14b4SPaul Moore if (audit_enabled == 0) 700afeb14b4SPaul Moore return NULL; 701ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 702ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 703ab5f5e8bSJoy Latten if (audit_buf == NULL) 704ab5f5e8bSJoy Latten return NULL; 705afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 706afeb14b4SPaul Moore return audit_buf; 707afeb14b4SPaul Moore } 708afeb14b4SPaul Moore 7092e71029eSTetsuo Handa static inline void xfrm_audit_helper_usrinfo(bool task_valid, 710afeb14b4SPaul Moore struct audit_buffer *audit_buf) 711afeb14b4SPaul Moore { 7122e71029eSTetsuo Handa const unsigned int auid = from_kuid(&init_user_ns, task_valid ? 7132e71029eSTetsuo Handa audit_get_loginuid(current) : 7142e71029eSTetsuo Handa INVALID_UID); 7152e71029eSTetsuo Handa const unsigned int ses = task_valid ? audit_get_sessionid(current) : 7162e71029eSTetsuo Handa (unsigned int) -1; 7172e71029eSTetsuo Handa 7182e71029eSTetsuo Handa audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); 719ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 720ab5f5e8bSJoy Latten } 721ab5f5e8bSJoy Latten 7222e71029eSTetsuo Handa void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid); 7232e71029eSTetsuo Handa void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 7242e71029eSTetsuo Handa bool task_valid); 7252e71029eSTetsuo Handa void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid); 7262e71029eSTetsuo Handa void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid); 727d511337aSJoe Perches void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 728afeb14b4SPaul Moore struct sk_buff *skb); 729d511337aSJoe Perches void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, 730d511337aSJoe Perches __be32 net_seq); 731d511337aSJoe Perches void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 732d511337aSJoe Perches void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, 733d511337aSJoe Perches __be32 net_seq); 734d511337aSJoe Perches void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, 735d511337aSJoe Perches u8 proto); 736c9204d9cSJoy Latten #else 73741fef0eeSMarcin Slusarz 73841fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 7392e71029eSTetsuo Handa bool task_valid) 74041fef0eeSMarcin Slusarz { 74141fef0eeSMarcin Slusarz } 74241fef0eeSMarcin Slusarz 74341fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 7442e71029eSTetsuo Handa bool task_valid) 74541fef0eeSMarcin Slusarz { 74641fef0eeSMarcin Slusarz } 74741fef0eeSMarcin Slusarz 74841fef0eeSMarcin Slusarz static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, 7492e71029eSTetsuo Handa bool task_valid) 75041fef0eeSMarcin Slusarz { 75141fef0eeSMarcin Slusarz } 75241fef0eeSMarcin Slusarz 75341fef0eeSMarcin Slusarz static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, 7542e71029eSTetsuo Handa bool task_valid) 75541fef0eeSMarcin Slusarz { 75641fef0eeSMarcin Slusarz } 75741fef0eeSMarcin Slusarz 75841fef0eeSMarcin Slusarz static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 75941fef0eeSMarcin Slusarz struct sk_buff *skb) 76041fef0eeSMarcin Slusarz { 76141fef0eeSMarcin Slusarz } 76241fef0eeSMarcin Slusarz 7639fdc4883SSteffen Klassert static inline void xfrm_audit_state_replay(struct xfrm_state *x, 7649fdc4883SSteffen Klassert struct sk_buff *skb, __be32 net_seq) 7659fdc4883SSteffen Klassert { 7669fdc4883SSteffen Klassert } 7679fdc4883SSteffen Klassert 76841fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, 76941fef0eeSMarcin Slusarz u16 family) 77041fef0eeSMarcin Slusarz { 77141fef0eeSMarcin Slusarz } 77241fef0eeSMarcin Slusarz 77341fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 77441fef0eeSMarcin Slusarz __be32 net_spi, __be32 net_seq) 77541fef0eeSMarcin Slusarz { 77641fef0eeSMarcin Slusarz } 77741fef0eeSMarcin Slusarz 77841fef0eeSMarcin Slusarz static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, 77941fef0eeSMarcin Slusarz struct sk_buff *skb, u8 proto) 78041fef0eeSMarcin Slusarz { 78141fef0eeSMarcin Slusarz } 782c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 783161a09e7SJoy Latten 7841da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 7851da177e4SLinus Torvalds { 7861da177e4SLinus Torvalds if (likely(policy != NULL)) 7871da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 7881da177e4SLinus Torvalds } 7891da177e4SLinus Torvalds 790d511337aSJoe Perches void xfrm_policy_destroy(struct xfrm_policy *policy); 7911da177e4SLinus Torvalds 7921da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 7931da177e4SLinus Torvalds { 7941da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 79564c31b3fSWANG Cong xfrm_policy_destroy(policy); 7961da177e4SLinus Torvalds } 7971da177e4SLinus Torvalds 7984e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7994e81bb83SMasahide NAKAMURA { 8004e81bb83SMasahide NAKAMURA int i; 8014e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 8024e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 8034e81bb83SMasahide NAKAMURA } 8044e81bb83SMasahide NAKAMURA 805d511337aSJoe Perches void __xfrm_state_destroy(struct xfrm_state *); 8061da177e4SLinus Torvalds 80721380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 80821380b81SHerbert Xu { 80921380b81SHerbert Xu atomic_dec(&x->refcnt); 81021380b81SHerbert Xu } 81121380b81SHerbert Xu 8121da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 8131da177e4SLinus Torvalds { 8141da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 8151da177e4SLinus Torvalds __xfrm_state_destroy(x); 8161da177e4SLinus Torvalds } 8171da177e4SLinus Torvalds 8181da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 8191da177e4SLinus Torvalds { 8201da177e4SLinus Torvalds atomic_inc(&x->refcnt); 8211da177e4SLinus Torvalds } 8221da177e4SLinus Torvalds 8231744a8feSDavid S. Miller static inline bool addr_match(const void *token1, const void *token2, 8241744a8feSDavid S. Miller int prefixlen) 8251da177e4SLinus Torvalds { 8261744a8feSDavid S. Miller const __be32 *a1 = token1; 8271744a8feSDavid S. Miller const __be32 *a2 = token2; 8281da177e4SLinus Torvalds int pdw; 8291da177e4SLinus Torvalds int pbi; 8301da177e4SLinus Torvalds 831a6337463Sjamal pdw = prefixlen >> 5; /* num of whole u32 in prefix */ 8321da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 8331da177e4SLinus Torvalds 8341da177e4SLinus Torvalds if (pdw) 8351da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 8361744a8feSDavid S. Miller return false; 8371da177e4SLinus Torvalds 8381da177e4SLinus Torvalds if (pbi) { 8395f19343fSAl Viro __be32 mask; 8401da177e4SLinus Torvalds 8411da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 8421da177e4SLinus Torvalds 8431da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 8441744a8feSDavid S. Miller return false; 8451da177e4SLinus Torvalds } 8461da177e4SLinus Torvalds 8471744a8feSDavid S. Miller return true; 8481da177e4SLinus Torvalds } 8491da177e4SLinus Torvalds 85026bff940SAlexey Dobriyan static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) 85126bff940SAlexey Dobriyan { 85226bff940SAlexey Dobriyan /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ 85326bff940SAlexey Dobriyan if (prefixlen == 0) 85426bff940SAlexey Dobriyan return true; 85526bff940SAlexey Dobriyan return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen))); 85626bff940SAlexey Dobriyan } 85726bff940SAlexey Dobriyan 8581da177e4SLinus Torvalds static __inline__ 8596281dcc9SDavid S. Miller __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) 8601da177e4SLinus Torvalds { 861f9d07e41SAl Viro __be16 port; 8621d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8631da177e4SLinus Torvalds case IPPROTO_TCP: 8641da177e4SLinus Torvalds case IPPROTO_UDP: 865ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8661da177e4SLinus Torvalds case IPPROTO_SCTP: 8676281dcc9SDavid S. Miller port = uli->ports.sport; 8681da177e4SLinus Torvalds break; 8691da177e4SLinus Torvalds case IPPROTO_ICMP: 8701da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8716281dcc9SDavid S. Miller port = htons(uli->icmpt.type); 8721da177e4SLinus Torvalds break; 8732ce4272aSMasahide NAKAMURA case IPPROTO_MH: 8746281dcc9SDavid S. Miller port = htons(uli->mht.type); 8752ce4272aSMasahide NAKAMURA break; 876cc9ff19dSTimo Teräs case IPPROTO_GRE: 8776281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) >> 16); 878cc9ff19dSTimo Teräs break; 8791da177e4SLinus Torvalds default: 8801da177e4SLinus Torvalds port = 0; /*XXX*/ 8811da177e4SLinus Torvalds } 8821da177e4SLinus Torvalds return port; 8831da177e4SLinus Torvalds } 8841da177e4SLinus Torvalds 8851da177e4SLinus Torvalds static __inline__ 8866281dcc9SDavid S. Miller __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) 8871da177e4SLinus Torvalds { 888f9d07e41SAl Viro __be16 port; 8891d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8901da177e4SLinus Torvalds case IPPROTO_TCP: 8911da177e4SLinus Torvalds case IPPROTO_UDP: 892ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8931da177e4SLinus Torvalds case IPPROTO_SCTP: 8946281dcc9SDavid S. Miller port = uli->ports.dport; 8951da177e4SLinus Torvalds break; 8961da177e4SLinus Torvalds case IPPROTO_ICMP: 8971da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8986281dcc9SDavid S. Miller port = htons(uli->icmpt.code); 8991da177e4SLinus Torvalds break; 900cc9ff19dSTimo Teräs case IPPROTO_GRE: 9016281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) & 0xffff); 902cc9ff19dSTimo Teräs break; 9031da177e4SLinus Torvalds default: 9041da177e4SLinus Torvalds port = 0; /*XXX*/ 9051da177e4SLinus Torvalds } 9061da177e4SLinus Torvalds return port; 9071da177e4SLinus Torvalds } 9081da177e4SLinus Torvalds 909d511337aSJoe Perches bool xfrm_selector_match(const struct xfrm_selector *sel, 910d511337aSJoe Perches const struct flowi *fl, unsigned short family); 9111da177e4SLinus Torvalds 912df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 913df71837dSTrent Jaeger /* If neither has a context --> match 914df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 915df71837dSTrent Jaeger */ 916bc9b35adSDavid S. Miller static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 917df71837dSTrent Jaeger { 918df71837dSTrent Jaeger return ((!s1 && !s2) || 919df71837dSTrent Jaeger (s1 && s2 && 920df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 921df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 922df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 923df71837dSTrent Jaeger } 924df71837dSTrent Jaeger #else 925bc9b35adSDavid S. Miller static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 926df71837dSTrent Jaeger { 927bc9b35adSDavid S. Miller return true; 928df71837dSTrent Jaeger } 929df71837dSTrent Jaeger #endif 930df71837dSTrent Jaeger 9311da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 9321da177e4SLinus Torvalds * 9331da177e4SLinus Torvalds * dst->child points to the next element of bundle. 9341da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 9351da177e4SLinus Torvalds * 9361da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 9371da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 9381da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 9391da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 9401da177e4SLinus Torvalds * policy rule. 9411da177e4SLinus Torvalds */ 942fd2c3ef7SEric Dumazet struct xfrm_dst { 9431da177e4SLinus Torvalds union { 9441da177e4SLinus Torvalds struct dst_entry dst; 9451da177e4SLinus Torvalds struct rtable rt; 9461da177e4SLinus Torvalds struct rt6_info rt6; 9471da177e4SLinus Torvalds } u; 9481da177e4SLinus Torvalds struct dst_entry *route; 94980c802f3STimo Teräs struct flow_cache_object flo; 95080c802f3STimo Teräs struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; 95180c802f3STimo Teräs int num_pols, num_xfrms; 952157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 953157bfc25SMasahide NAKAMURA struct flowi *origin; 954157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 955157bfc25SMasahide NAKAMURA #endif 95680c802f3STimo Teräs u32 xfrm_genid; 95780c802f3STimo Teräs u32 policy_genid; 9581da177e4SLinus Torvalds u32 route_mtu_cached; 9591da177e4SLinus Torvalds u32 child_mtu_cached; 96092d63decSHideaki YOSHIFUJI u32 route_cookie; 96192d63decSHideaki YOSHIFUJI u32 path_cookie; 9621da177e4SLinus Torvalds }; 9631da177e4SLinus Torvalds 964def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 965aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 966aabc9761SHerbert Xu { 96780c802f3STimo Teräs xfrm_pols_put(xdst->pols, xdst->num_pols); 968aabc9761SHerbert Xu dst_release(xdst->route); 969aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 970aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 971157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 972157bfc25SMasahide NAKAMURA kfree(xdst->origin); 973157bfc25SMasahide NAKAMURA xdst->origin = NULL; 974157bfc25SMasahide NAKAMURA kfree(xdst->partner); 975157bfc25SMasahide NAKAMURA xdst->partner = NULL; 976157bfc25SMasahide NAKAMURA #endif 977aabc9761SHerbert Xu } 978def8b4faSAlexey Dobriyan #endif 979aabc9761SHerbert Xu 980d511337aSJoe Perches void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 981aabc9761SHerbert Xu 982fd2c3ef7SEric Dumazet struct sec_path { 9831da177e4SLinus Torvalds atomic_t refcnt; 9841da177e4SLinus Torvalds int len; 985dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 9861da177e4SLinus Torvalds }; 9871da177e4SLinus Torvalds 988990078afSMichael Smith static inline int secpath_exists(struct sk_buff *skb) 989990078afSMichael Smith { 990990078afSMichael Smith #ifdef CONFIG_XFRM 991990078afSMichael Smith return skb->sp != NULL; 992990078afSMichael Smith #else 993990078afSMichael Smith return 0; 994990078afSMichael Smith #endif 995990078afSMichael Smith } 996990078afSMichael Smith 9971da177e4SLinus Torvalds static inline struct sec_path * 9981da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 9991da177e4SLinus Torvalds { 10001da177e4SLinus Torvalds if (sp) 10011da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 10021da177e4SLinus Torvalds return sp; 10031da177e4SLinus Torvalds } 10041da177e4SLinus Torvalds 1005d511337aSJoe Perches void __secpath_destroy(struct sec_path *sp); 10061da177e4SLinus Torvalds 10071da177e4SLinus Torvalds static inline void 10081da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 10091da177e4SLinus Torvalds { 10101da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 10111da177e4SLinus Torvalds __secpath_destroy(sp); 10121da177e4SLinus Torvalds } 10131da177e4SLinus Torvalds 1014d511337aSJoe Perches struct sec_path *secpath_dup(struct sec_path *src); 10151da177e4SLinus Torvalds 10161da177e4SLinus Torvalds static inline void 10171da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 10181da177e4SLinus Torvalds { 10191da177e4SLinus Torvalds #ifdef CONFIG_XFRM 10201da177e4SLinus Torvalds secpath_put(skb->sp); 10211da177e4SLinus Torvalds skb->sp = NULL; 10221da177e4SLinus Torvalds #endif 10231da177e4SLinus Torvalds } 10241da177e4SLinus Torvalds 10251da177e4SLinus Torvalds static inline int 10266cc32961SDavid S. Miller xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) 1027a1e59abfSPatrick McHardy { 1028a1e59abfSPatrick McHardy switch (family) { 1029a1e59abfSPatrick McHardy case AF_INET: 1030a1e59abfSPatrick McHardy return addr->a4 == 0; 1031a1e59abfSPatrick McHardy case AF_INET6: 1032a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 1033a1e59abfSPatrick McHardy } 1034a1e59abfSPatrick McHardy return 0; 1035a1e59abfSPatrick McHardy } 1036a1e59abfSPatrick McHardy 1037a1e59abfSPatrick McHardy static inline int 103821eddb5cSDavid S. Miller __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 10391da177e4SLinus Torvalds { 10401da177e4SLinus Torvalds return (tmpl->saddr.a4 && 10411da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 10421da177e4SLinus Torvalds } 10431da177e4SLinus Torvalds 10441da177e4SLinus Torvalds static inline int 104521eddb5cSDavid S. Miller __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 10461da177e4SLinus Torvalds { 10471da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 1048ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 10491da177e4SLinus Torvalds } 10501da177e4SLinus Torvalds 10511da177e4SLinus Torvalds static inline int 105221eddb5cSDavid S. Miller xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) 10531da177e4SLinus Torvalds { 10541da177e4SLinus Torvalds switch (family) { 10551da177e4SLinus Torvalds case AF_INET: 10561da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 10571da177e4SLinus Torvalds case AF_INET6: 10581da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 10591da177e4SLinus Torvalds } 10601da177e4SLinus Torvalds return !0; 10611da177e4SLinus Torvalds } 10621da177e4SLinus Torvalds 10631da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1064d511337aSJoe Perches int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, 1065d511337aSJoe Perches unsigned short family); 10661da177e4SLinus Torvalds 1067d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 1068d5422efeSHerbert Xu struct sk_buff *skb, 1069d5422efeSHerbert Xu unsigned int family, int reverse) 10701da177e4SLinus Torvalds { 1071f6e1e25dSAlexey Dobriyan struct net *net = dev_net(skb->dev); 1072d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 1073d5422efeSHerbert Xu 10741da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 1075d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 10761da177e4SLinus Torvalds 1077f6e1e25dSAlexey Dobriyan return (!net->xfrm.policy_count[dir] && !skb->sp) || 1078adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOPOLICY) || 1079d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 1080d5422efeSHerbert Xu } 1081d5422efeSHerbert Xu 1082d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 1083d5422efeSHerbert Xu { 1084d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 10851da177e4SLinus Torvalds } 10861da177e4SLinus Torvalds 10871da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10881da177e4SLinus Torvalds { 10891da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 10901da177e4SLinus Torvalds } 10911da177e4SLinus Torvalds 10921da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10931da177e4SLinus Torvalds { 10941da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 10951da177e4SLinus Torvalds } 10961da177e4SLinus Torvalds 1097d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1098d5422efeSHerbert Xu struct sk_buff *skb) 1099d5422efeSHerbert Xu { 1100d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 1101d5422efeSHerbert Xu } 1102d5422efeSHerbert Xu 1103d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1104d5422efeSHerbert Xu struct sk_buff *skb) 1105d5422efeSHerbert Xu { 1106d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 1107d5422efeSHerbert Xu } 1108d5422efeSHerbert Xu 1109d511337aSJoe Perches int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1110d5422efeSHerbert Xu unsigned int family, int reverse); 1111d5422efeSHerbert Xu 1112d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1113d5422efeSHerbert Xu unsigned int family) 1114d5422efeSHerbert Xu { 1115d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 1116d5422efeSHerbert Xu } 1117d5422efeSHerbert Xu 1118d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1119d5422efeSHerbert Xu struct flowi *fl, 1120d5422efeSHerbert Xu unsigned int family) 1121d5422efeSHerbert Xu { 1122d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 1123d5422efeSHerbert Xu } 1124d5422efeSHerbert Xu 1125d511337aSJoe Perches int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 11261da177e4SLinus Torvalds 11271da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 11281da177e4SLinus Torvalds { 112999a66657SAlexey Dobriyan struct net *net = dev_net(skb->dev); 113099a66657SAlexey Dobriyan 113199a66657SAlexey Dobriyan return !net->xfrm.policy_count[XFRM_POLICY_OUT] || 1132adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOXFRM) || 11331da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 11341da177e4SLinus Torvalds } 11351da177e4SLinus Torvalds 11361da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 11371da177e4SLinus Torvalds { 11381da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 11391da177e4SLinus Torvalds } 11401da177e4SLinus Torvalds 11411da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 11421da177e4SLinus Torvalds { 11431da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 11441da177e4SLinus Torvalds } 11451da177e4SLinus Torvalds 1146d511337aSJoe Perches int __xfrm_sk_clone_policy(struct sock *sk); 11471da177e4SLinus Torvalds 11481da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 11491da177e4SLinus Torvalds { 11501da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 11511da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 11521da177e4SLinus Torvalds return 0; 11531da177e4SLinus Torvalds } 11541da177e4SLinus Torvalds 1155d511337aSJoe Perches int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 11561da177e4SLinus Torvalds 11571da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 11581da177e4SLinus Torvalds { 11591da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 11601da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 11611da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 11621da177e4SLinus Torvalds } 11631da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 11641da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 11651da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 11661da177e4SLinus Torvalds } 11671da177e4SLinus Torvalds } 11681da177e4SLinus Torvalds 1169d511337aSJoe Perches void xfrm_garbage_collect(struct net *net); 1170e4c17216SPaul Moore 11711da177e4SLinus Torvalds #else 11721da177e4SLinus Torvalds 11731da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 11741da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 11751da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 11761da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 11771da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11781da177e4SLinus Torvalds { 11791da177e4SLinus Torvalds return 1; 11801da177e4SLinus Torvalds } 11811da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11821da177e4SLinus Torvalds { 11831da177e4SLinus Torvalds return 1; 11841da177e4SLinus Torvalds } 11851da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 11861da177e4SLinus Torvalds { 11871da177e4SLinus Torvalds return 1; 11881da177e4SLinus Torvalds } 1189d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1190d5422efeSHerbert Xu struct flowi *fl, 1191d5422efeSHerbert Xu unsigned int family) 1192d5422efeSHerbert Xu { 1193d5422efeSHerbert Xu return -ENOSYS; 1194d5422efeSHerbert Xu } 1195d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1196d5422efeSHerbert Xu struct sk_buff *skb) 1197d5422efeSHerbert Xu { 1198d5422efeSHerbert Xu return 1; 1199d5422efeSHerbert Xu } 1200d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1201d5422efeSHerbert Xu struct sk_buff *skb) 1202d5422efeSHerbert Xu { 1203d5422efeSHerbert Xu return 1; 1204d5422efeSHerbert Xu } 1205e4c17216SPaul Moore static inline void xfrm_garbage_collect(struct net *net) 1206e4c17216SPaul Moore { 1207e4c17216SPaul Moore } 12081da177e4SLinus Torvalds #endif 12091da177e4SLinus Torvalds 12101da177e4SLinus Torvalds static __inline__ 1211e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) 12121da177e4SLinus Torvalds { 12131da177e4SLinus Torvalds switch (family){ 12141da177e4SLinus Torvalds case AF_INET: 12157e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.daddr; 12161da177e4SLinus Torvalds case AF_INET6: 12177e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.daddr; 12181da177e4SLinus Torvalds } 12191da177e4SLinus Torvalds return NULL; 12201da177e4SLinus Torvalds } 12211da177e4SLinus Torvalds 12221da177e4SLinus Torvalds static __inline__ 1223e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) 12241da177e4SLinus Torvalds { 12251da177e4SLinus Torvalds switch (family){ 12261da177e4SLinus Torvalds case AF_INET: 12277e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.saddr; 12281da177e4SLinus Torvalds case AF_INET6: 12297e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.saddr; 12301da177e4SLinus Torvalds } 12311da177e4SLinus Torvalds return NULL; 12321da177e4SLinus Torvalds } 12331da177e4SLinus Torvalds 12349bb182a7SYOSHIFUJI Hideaki static __inline__ 1235e8a4e377SDavid S. Miller void xfrm_flowi_addr_get(const struct flowi *fl, 12369bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 12379bb182a7SYOSHIFUJI Hideaki unsigned short family) 12389bb182a7SYOSHIFUJI Hideaki { 12399bb182a7SYOSHIFUJI Hideaki switch(family) { 12409bb182a7SYOSHIFUJI Hideaki case AF_INET: 12417e1dc7b6SDavid S. Miller memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); 12427e1dc7b6SDavid S. Miller memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); 12439bb182a7SYOSHIFUJI Hideaki break; 12449bb182a7SYOSHIFUJI Hideaki case AF_INET6: 12454e3fd7a0SAlexey Dobriyan *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr; 12464e3fd7a0SAlexey Dobriyan *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr; 12479bb182a7SYOSHIFUJI Hideaki break; 12489bb182a7SYOSHIFUJI Hideaki } 12499bb182a7SYOSHIFUJI Hideaki } 12509bb182a7SYOSHIFUJI Hideaki 12511da177e4SLinus Torvalds static __inline__ int 1252f8848067SDavid S. Miller __xfrm4_state_addr_check(const struct xfrm_state *x, 1253f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 12541da177e4SLinus Torvalds { 12551da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 12561da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 12571da177e4SLinus Torvalds return 1; 12581da177e4SLinus Torvalds return 0; 12591da177e4SLinus Torvalds } 12601da177e4SLinus Torvalds 12611da177e4SLinus Torvalds static __inline__ int 1262f8848067SDavid S. Miller __xfrm6_state_addr_check(const struct xfrm_state *x, 1263f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 12641da177e4SLinus Torvalds { 1265ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 1266ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || 12671da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 12681da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 12691da177e4SLinus Torvalds return 1; 12701da177e4SLinus Torvalds return 0; 12711da177e4SLinus Torvalds } 12721da177e4SLinus Torvalds 12731da177e4SLinus Torvalds static __inline__ int 1274f8848067SDavid S. Miller xfrm_state_addr_check(const struct xfrm_state *x, 1275f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr, 12761da177e4SLinus Torvalds unsigned short family) 12771da177e4SLinus Torvalds { 12781da177e4SLinus Torvalds switch (family) { 12791da177e4SLinus Torvalds case AF_INET: 12801da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 12811da177e4SLinus Torvalds case AF_INET6: 12821da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 12831da177e4SLinus Torvalds } 12841da177e4SLinus Torvalds return 0; 12851da177e4SLinus Torvalds } 12861da177e4SLinus Torvalds 1287e53820deSMasahide NAKAMURA static __inline__ int 1288f8848067SDavid S. Miller xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, 1289e53820deSMasahide NAKAMURA unsigned short family) 1290e53820deSMasahide NAKAMURA { 1291e53820deSMasahide NAKAMURA switch (family) { 1292e53820deSMasahide NAKAMURA case AF_INET: 1293e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 12947e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.daddr, 12957e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.saddr); 1296e53820deSMasahide NAKAMURA case AF_INET6: 1297e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 12987e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.daddr, 12997e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.saddr); 1300e53820deSMasahide NAKAMURA } 1301e53820deSMasahide NAKAMURA return 0; 1302e53820deSMasahide NAKAMURA } 1303e53820deSMasahide NAKAMURA 1304f8848067SDavid S. Miller static inline int xfrm_state_kern(const struct xfrm_state *x) 13051da177e4SLinus Torvalds { 13061da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 13071da177e4SLinus Torvalds } 13081da177e4SLinus Torvalds 13095794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 13105794708fSMasahide NAKAMURA { 1311dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1312dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1313dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1314dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 13155794708fSMasahide NAKAMURA } 13165794708fSMasahide NAKAMURA 13171da177e4SLinus Torvalds /* 13181da177e4SLinus Torvalds * xfrm algorithm information 13191da177e4SLinus Torvalds */ 13201a6509d9SHerbert Xu struct xfrm_algo_aead_info { 13211a6509d9SHerbert Xu u16 icv_truncbits; 13221a6509d9SHerbert Xu }; 13231a6509d9SHerbert Xu 13241da177e4SLinus Torvalds struct xfrm_algo_auth_info { 13251da177e4SLinus Torvalds u16 icv_truncbits; 13261da177e4SLinus Torvalds u16 icv_fullbits; 13271da177e4SLinus Torvalds }; 13281da177e4SLinus Torvalds 13291da177e4SLinus Torvalds struct xfrm_algo_encr_info { 13301da177e4SLinus Torvalds u16 blockbits; 13311da177e4SLinus Torvalds u16 defkeybits; 13321da177e4SLinus Torvalds }; 13331da177e4SLinus Torvalds 13341da177e4SLinus Torvalds struct xfrm_algo_comp_info { 13351da177e4SLinus Torvalds u16 threshold; 13361da177e4SLinus Torvalds }; 13371da177e4SLinus Torvalds 13381da177e4SLinus Torvalds struct xfrm_algo_desc { 13391da177e4SLinus Torvalds char *name; 134004ff1260SHerbert Xu char *compat; 13411da177e4SLinus Torvalds u8 available:1; 13427e50f84cSJussi Kivilinna u8 pfkey_supported:1; 13431da177e4SLinus Torvalds union { 13441a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 13451da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 13461da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 13471da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 13481da177e4SLinus Torvalds } uinfo; 13491da177e4SLinus Torvalds struct sadb_alg desc; 13501da177e4SLinus Torvalds }; 13511da177e4SLinus Torvalds 13523328715eSSteffen Klassert /* XFRM protocol handlers. */ 13533328715eSSteffen Klassert struct xfrm4_protocol { 13543328715eSSteffen Klassert int (*handler)(struct sk_buff *skb); 13553328715eSSteffen Klassert int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, 13563328715eSSteffen Klassert int encap_type); 13573328715eSSteffen Klassert int (*cb_handler)(struct sk_buff *skb, int err); 13583328715eSSteffen Klassert int (*err_handler)(struct sk_buff *skb, u32 info); 13593328715eSSteffen Klassert 13603328715eSSteffen Klassert struct xfrm4_protocol __rcu *next; 13613328715eSSteffen Klassert int priority; 13623328715eSSteffen Klassert }; 13633328715eSSteffen Klassert 13647e14ea15SSteffen Klassert struct xfrm6_protocol { 13657e14ea15SSteffen Klassert int (*handler)(struct sk_buff *skb); 13667e14ea15SSteffen Klassert int (*cb_handler)(struct sk_buff *skb, int err); 13677e14ea15SSteffen Klassert int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 13687e14ea15SSteffen Klassert u8 type, u8 code, int offset, __be32 info); 13697e14ea15SSteffen Klassert 13707e14ea15SSteffen Klassert struct xfrm6_protocol __rcu *next; 13717e14ea15SSteffen Klassert int priority; 13727e14ea15SSteffen Klassert }; 13737e14ea15SSteffen Klassert 13741da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 13751da177e4SLinus Torvalds struct xfrm_tunnel { 13761da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1377a6337463Sjamal int (*err_handler)(struct sk_buff *skb, u32 info); 1378d2acc347SHerbert Xu 1379b33eab08SEric Dumazet struct xfrm_tunnel __rcu *next; 1380d2acc347SHerbert Xu int priority; 13811da177e4SLinus Torvalds }; 13821da177e4SLinus Torvalds 13831da177e4SLinus Torvalds struct xfrm6_tunnel { 1384d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1385d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 1386d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info); 13876f0bcf15SEric Dumazet struct xfrm6_tunnel __rcu *next; 1388d2acc347SHerbert Xu int priority; 13891da177e4SLinus Torvalds }; 13901da177e4SLinus Torvalds 1391d511337aSJoe Perches void xfrm_init(void); 1392d511337aSJoe Perches void xfrm4_init(void); 1393d511337aSJoe Perches int xfrm_state_init(struct net *net); 1394d511337aSJoe Perches void xfrm_state_fini(struct net *net); 1395d511337aSJoe Perches void xfrm4_state_init(void); 13962f32b51bSSteffen Klassert void xfrm4_protocol_init(void); 1397c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1398d511337aSJoe Perches int xfrm6_init(void); 1399d511337aSJoe Perches void xfrm6_fini(void); 1400d511337aSJoe Perches int xfrm6_state_init(void); 1401d511337aSJoe Perches void xfrm6_state_fini(void); 14027e14ea15SSteffen Klassert int xfrm6_protocol_init(void); 14037e14ea15SSteffen Klassert void xfrm6_protocol_fini(void); 1404c35b7e72SDaniel Lezcano #else 1405c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1406c35b7e72SDaniel Lezcano { 1407c35b7e72SDaniel Lezcano return 0; 1408c35b7e72SDaniel Lezcano } 1409c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1410c35b7e72SDaniel Lezcano { 1411c35b7e72SDaniel Lezcano ; 1412c35b7e72SDaniel Lezcano } 1413c35b7e72SDaniel Lezcano #endif 14141da177e4SLinus Torvalds 1415558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1416d511337aSJoe Perches int xfrm_proc_init(struct net *net); 1417d511337aSJoe Perches void xfrm_proc_fini(struct net *net); 1418558f82efSMasahide NAKAMURA #endif 1419558f82efSMasahide NAKAMURA 1420d511337aSJoe Perches int xfrm_sysctl_init(struct net *net); 1421b27aeadbSAlexey Dobriyan #ifdef CONFIG_SYSCTL 1422d511337aSJoe Perches void xfrm_sysctl_fini(struct net *net); 1423b27aeadbSAlexey Dobriyan #else 1424b27aeadbSAlexey Dobriyan static inline void xfrm_sysctl_fini(struct net *net) 1425b27aeadbSAlexey Dobriyan { 1426b27aeadbSAlexey Dobriyan } 1427b27aeadbSAlexey Dobriyan #endif 1428b27aeadbSAlexey Dobriyan 1429d3623099SNicolas Dichtel void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, 1430870a2df4SNicolas Dichtel struct xfrm_address_filter *filter); 1431d511337aSJoe Perches int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 14324c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1433283bc9f3SFan Du void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); 1434d511337aSJoe Perches struct xfrm_state *xfrm_state_alloc(struct net *net); 1435d511337aSJoe Perches struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, 143633765d06SDavid S. Miller const xfrm_address_t *saddr, 1437b520e9f6SDavid S. Miller const struct flowi *fl, 1438b520e9f6SDavid S. Miller struct xfrm_tmpl *tmpl, 14391da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 14401da177e4SLinus Torvalds unsigned short family); 1441d511337aSJoe Perches struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, 14425447c5e4SAlexey Dobriyan xfrm_address_t *daddr, 1443628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1444628529b6SJamal Hadi Salim unsigned short family, 1445628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 1446c454997eSFan Du struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, 1447c454997eSFan Du unsigned short family); 1448d511337aSJoe Perches int xfrm_state_check_expire(struct xfrm_state *x); 1449d511337aSJoe Perches void xfrm_state_insert(struct xfrm_state *x); 1450d511337aSJoe Perches int xfrm_state_add(struct xfrm_state *x); 1451d511337aSJoe Perches int xfrm_state_update(struct xfrm_state *x); 1452d511337aSJoe Perches struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, 1453a70486f0SDavid S. Miller const xfrm_address_t *daddr, __be32 spi, 1454bd55775cSJamal Hadi Salim u8 proto, unsigned short family); 1455d511337aSJoe Perches struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, 1456a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1457a70486f0SDavid S. Miller const xfrm_address_t *saddr, 1458bd55775cSJamal Hadi Salim u8 proto, 1459bd55775cSJamal Hadi Salim unsigned short family); 146041a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 1461d511337aSJoe Perches int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, 1462283bc9f3SFan Du unsigned short family, struct net *net); 1463d511337aSJoe Perches int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, 1464d511337aSJoe Perches unsigned short family); 146541a49cc3SMasahide NAKAMURA #else 146641a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 1467283bc9f3SFan Du int n, unsigned short family, struct net *net) 146841a49cc3SMasahide NAKAMURA { 146941a49cc3SMasahide NAKAMURA return -ENOSYS; 147041a49cc3SMasahide NAKAMURA } 147141a49cc3SMasahide NAKAMURA 147241a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 147341a49cc3SMasahide NAKAMURA int n, unsigned short family) 147441a49cc3SMasahide NAKAMURA { 147541a49cc3SMasahide NAKAMURA return -ENOSYS; 147641a49cc3SMasahide NAKAMURA } 147741a49cc3SMasahide NAKAMURA #endif 1478af11e316SJamal Hadi Salim 1479af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1480af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1481af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1482af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1483af11e316SJamal Hadi Salim }; 1484af11e316SJamal Hadi Salim 14855a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 14865a6d3416SJamal Hadi Salim u32 incnt; 14875a6d3416SJamal Hadi Salim u32 outcnt; 14885a6d3416SJamal Hadi Salim u32 fwdcnt; 14895a6d3416SJamal Hadi Salim u32 inscnt; 14905a6d3416SJamal Hadi Salim u32 outscnt; 14915a6d3416SJamal Hadi Salim u32 fwdscnt; 14925a6d3416SJamal Hadi Salim u32 spdhcnt; 14935a6d3416SJamal Hadi Salim u32 spdhmcnt; 14945a6d3416SJamal Hadi Salim }; 14955a6d3416SJamal Hadi Salim 1496d511337aSJoe Perches struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); 1497d511337aSJoe Perches int xfrm_state_delete(struct xfrm_state *x); 14982e71029eSTetsuo Handa int xfrm_state_flush(struct net *net, u8 proto, bool task_valid); 1499d511337aSJoe Perches void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); 1500d511337aSJoe Perches void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); 1501d511337aSJoe Perches u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); 1502d511337aSJoe Perches int xfrm_init_replay(struct xfrm_state *x); 1503d511337aSJoe Perches int xfrm_state_mtu(struct xfrm_state *x, int mtu); 1504d511337aSJoe Perches int __xfrm_init_state(struct xfrm_state *x, bool init_replay); 1505d511337aSJoe Perches int xfrm_init_state(struct xfrm_state *x); 1506d511337aSJoe Perches int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1507d511337aSJoe Perches int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); 1508d511337aSJoe Perches int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1509d511337aSJoe Perches int xfrm_output_resume(struct sk_buff *skb, int err); 1510d511337aSJoe Perches int xfrm_output(struct sk_buff *skb); 1511d511337aSJoe Perches int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 1512d511337aSJoe Perches void xfrm_local_error(struct sk_buff *skb, int mtu); 1513d511337aSJoe Perches int xfrm4_extract_header(struct sk_buff *skb); 1514d511337aSJoe Perches int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1515d511337aSJoe Perches int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1516716062fdSHerbert Xu int encap_type); 1517d511337aSJoe Perches int xfrm4_transport_finish(struct sk_buff *skb, int async); 1518d511337aSJoe Perches int xfrm4_rcv(struct sk_buff *skb); 1519c4541b41SHerbert Xu 1520c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1521c4541b41SHerbert Xu { 152270be6c91SSteffen Klassert XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; 15233328715eSSteffen Klassert XFRM_SPI_SKB_CB(skb)->family = AF_INET; 15243328715eSSteffen Klassert XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); 15253328715eSSteffen Klassert return xfrm_input(skb, nexthdr, spi, 0); 1526c4541b41SHerbert Xu } 1527c4541b41SHerbert Xu 1528d511337aSJoe Perches int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 1529d511337aSJoe Perches int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 1530aad88724SEric Dumazet int xfrm4_output(struct sock *sk, struct sk_buff *skb); 1531d511337aSJoe Perches int xfrm4_output_finish(struct sk_buff *skb); 15323328715eSSteffen Klassert int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err); 15333328715eSSteffen Klassert int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); 15343328715eSSteffen Klassert int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol); 1535d511337aSJoe Perches int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1536d511337aSJoe Perches int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 1537d511337aSJoe Perches void xfrm4_local_error(struct sk_buff *skb, u32 mtu); 1538d511337aSJoe Perches int xfrm6_extract_header(struct sk_buff *skb); 1539d511337aSJoe Perches int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1540d511337aSJoe Perches int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1541d511337aSJoe Perches int xfrm6_transport_finish(struct sk_buff *skb, int async); 1542d511337aSJoe Perches int xfrm6_rcv(struct sk_buff *skb); 1543d511337aSJoe Perches int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1544fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 15457b77d161SDavid S. Miller void xfrm6_local_error(struct sk_buff *skb, u32 mtu); 15467e14ea15SSteffen Klassert int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err); 15477e14ea15SSteffen Klassert int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol); 15487e14ea15SSteffen Klassert int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol); 1549d511337aSJoe Perches int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 15507b77d161SDavid S. Miller int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 1551d511337aSJoe Perches __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); 1552d511337aSJoe Perches __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); 1553d511337aSJoe Perches int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 1554d511337aSJoe Perches int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 1555aad88724SEric Dumazet int xfrm6_output(struct sock *sk, struct sk_buff *skb); 1556d511337aSJoe Perches int xfrm6_output_finish(struct sk_buff *skb); 1557d511337aSJoe Perches int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1558aee5adb4SMasahide NAKAMURA u8 **prevhdr); 15591da177e4SLinus Torvalds 15601da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1561d511337aSJoe Perches int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 1562d511337aSJoe Perches int xfrm_user_policy(struct sock *sk, int optname, 1563d511337aSJoe Perches u8 __user *optval, int optlen); 15641da177e4SLinus Torvalds #else 15651da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 15661da177e4SLinus Torvalds { 15671da177e4SLinus Torvalds return -ENOPROTOOPT; 15681da177e4SLinus Torvalds } 15691da177e4SLinus Torvalds 1570067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 15711da177e4SLinus Torvalds { 15721da177e4SLinus Torvalds /* should not happen */ 15731da177e4SLinus Torvalds kfree_skb(skb); 15741da177e4SLinus Torvalds return 0; 15751da177e4SLinus Torvalds } 15761da177e4SLinus Torvalds #endif 15771da177e4SLinus Torvalds 15780331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 15794c563f76STimo Teras 1580d511337aSJoe Perches void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 1581d511337aSJoe Perches int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, 1582d511337aSJoe Perches int (*func)(struct xfrm_policy *, int, int, void*), 1583d511337aSJoe Perches void *); 1584283bc9f3SFan Du void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); 15851da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 15868ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, 15878ca2e93bSJamal Hadi Salim u8 type, int dir, 15884e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1589ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1590ef41aaa0SEric Paris int *err); 1591d511337aSJoe Perches struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, 1592d511337aSJoe Perches u32 id, int delete, int *err); 15932e71029eSTetsuo Handa int xfrm_policy_flush(struct net *net, u8 type, bool task_valid); 1594880a6fabSChristophe Gouault void xfrm_policy_hash_rebuild(struct net *net); 15951da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1596776e9dd9SFan Du int verify_spi_info(u8 proto, u32 min, u32 max); 1597d511337aSJoe Perches int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 1598e473fcb4SMathias Krause struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, 1599bd55775cSJamal Hadi Salim u8 mode, u32 reqid, u8 proto, 1600a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1601a70486f0SDavid S. Miller const xfrm_address_t *saddr, int create, 1602bd55775cSJamal Hadi Salim unsigned short family); 1603d511337aSJoe Perches int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 16041da177e4SLinus Torvalds 160580c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1606d511337aSJoe Perches int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 1607183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_bundles, 1608183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 1609283bc9f3SFan Du struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net); 1610d511337aSJoe Perches struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, 161180c9abaaSShinta Sugimoto struct xfrm_migrate *m); 1612d511337aSJoe Perches int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 161313c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 16148d549c4fSFan Du struct xfrm_kmaddress *k, struct net *net); 161580c9abaaSShinta Sugimoto #endif 161680c9abaaSShinta Sugimoto 1617d511337aSJoe Perches int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 1618d511337aSJoe Perches void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); 1619d511337aSJoe Perches int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, 1620d511337aSJoe Perches xfrm_address_t *addr); 16211da177e4SLinus Torvalds 1622d511337aSJoe Perches void xfrm_input_init(void); 1623d511337aSJoe Perches int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 16241da177e4SLinus Torvalds 1625d511337aSJoe Perches void xfrm_probe_algs(void); 1626d511337aSJoe Perches int xfrm_count_pfkey_auth_supported(void); 1627d511337aSJoe Perches int xfrm_count_pfkey_enc_supported(void); 1628d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 1629d511337aSJoe Perches struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 1630d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 1631d511337aSJoe Perches struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 1632d511337aSJoe Perches struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 1633d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); 1634d511337aSJoe Perches struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); 1635d511337aSJoe Perches struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); 1636d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, 16371a6509d9SHerbert Xu int probe); 16381da177e4SLinus Torvalds 1639ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 static inline bool xfrm6_addr_equal(const xfrm_address_t *a, 1640ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 const xfrm_address_t *b) 1641ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 { 1642ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 return ipv6_addr_equal((const struct in6_addr *)a, 1643ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 (const struct in6_addr *)b); 1644ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 } 1645ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 164670e94e66SYOSHIFUJI Hideaki / 吉藤英明 static inline bool xfrm_addr_equal(const xfrm_address_t *a, 164770e94e66SYOSHIFUJI Hideaki / 吉藤英明 const xfrm_address_t *b, 164870e94e66SYOSHIFUJI Hideaki / 吉藤英明 sa_family_t family) 164970e94e66SYOSHIFUJI Hideaki / 吉藤英明 { 165070e94e66SYOSHIFUJI Hideaki / 吉藤英明 switch (family) { 165170e94e66SYOSHIFUJI Hideaki / 吉藤英明 default: 165270e94e66SYOSHIFUJI Hideaki / 吉藤英明 case AF_INET: 165370e94e66SYOSHIFUJI Hideaki / 吉藤英明 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; 165470e94e66SYOSHIFUJI Hideaki / 吉藤英明 case AF_INET6: 165570e94e66SYOSHIFUJI Hideaki / 吉藤英明 return xfrm6_addr_equal(a, b); 165670e94e66SYOSHIFUJI Hideaki / 吉藤英明 } 165770e94e66SYOSHIFUJI Hideaki / 吉藤英明 } 165870e94e66SYOSHIFUJI Hideaki / 吉藤英明 165977d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 166077d8d7a6SHerbert Xu { 166177d8d7a6SHerbert Xu return index & 7; 166277d8d7a6SHerbert Xu } 166377d8d7a6SHerbert Xu 1664a6483b79SAlexey Dobriyan #ifdef CONFIG_XFRM 1665a6483b79SAlexey Dobriyan static inline int xfrm_aevent_is_on(struct net *net) 1666f8cd5488SJamal Hadi Salim { 1667be33690dSPatrick McHardy struct sock *nlsk; 1668be33690dSPatrick McHardy int ret = 0; 1669be33690dSPatrick McHardy 1670be33690dSPatrick McHardy rcu_read_lock(); 1671a6483b79SAlexey Dobriyan nlsk = rcu_dereference(net->xfrm.nlsk); 1672be33690dSPatrick McHardy if (nlsk) 1673be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1674be33690dSPatrick McHardy rcu_read_unlock(); 1675be33690dSPatrick McHardy return ret; 1676f8cd5488SJamal Hadi Salim } 16770f24558eSHoria Geanta 16780f24558eSHoria Geanta static inline int xfrm_acquire_is_on(struct net *net) 16790f24558eSHoria Geanta { 16800f24558eSHoria Geanta struct sock *nlsk; 16810f24558eSHoria Geanta int ret = 0; 16820f24558eSHoria Geanta 16830f24558eSHoria Geanta rcu_read_lock(); 16840f24558eSHoria Geanta nlsk = rcu_dereference(net->xfrm.nlsk); 16850f24558eSHoria Geanta if (nlsk) 16860f24558eSHoria Geanta ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE); 16870f24558eSHoria Geanta rcu_read_unlock(); 16880f24558eSHoria Geanta 16890f24558eSHoria Geanta return ret; 16900f24558eSHoria Geanta } 1691a6483b79SAlexey Dobriyan #endif 1692f8cd5488SJamal Hadi Salim 1693ee5c2317SSteffen Klassert static inline int aead_len(struct xfrm_algo_aead *alg) 1694ee5c2317SSteffen Klassert { 1695ee5c2317SSteffen Klassert return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 1696ee5c2317SSteffen Klassert } 1697ee5c2317SSteffen Klassert 169885158621SDavid S. Miller static inline int xfrm_alg_len(const struct xfrm_algo *alg) 16990f99be0dSEric Dumazet { 17000f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 17010f99be0dSEric Dumazet } 17020f99be0dSEric Dumazet 170385158621SDavid S. Miller static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) 17044447bb33SMartin Willi { 17054447bb33SMartin Willi return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 17064447bb33SMartin Willi } 17074447bb33SMartin Willi 17089736acf3SSteffen Klassert static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) 17099736acf3SSteffen Klassert { 17109736acf3SSteffen Klassert return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); 17119736acf3SSteffen Klassert } 17129736acf3SSteffen Klassert 171380c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1714af2f464eSSteffen Klassert static inline int xfrm_replay_clone(struct xfrm_state *x, 1715af2f464eSSteffen Klassert struct xfrm_state *orig) 1716af2f464eSSteffen Klassert { 1717af2f464eSSteffen Klassert x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), 1718af2f464eSSteffen Klassert GFP_KERNEL); 1719af2f464eSSteffen Klassert if (!x->replay_esn) 1720af2f464eSSteffen Klassert return -ENOMEM; 1721af2f464eSSteffen Klassert 1722af2f464eSSteffen Klassert x->replay_esn->bmp_len = orig->replay_esn->bmp_len; 1723af2f464eSSteffen Klassert x->replay_esn->replay_window = orig->replay_esn->replay_window; 1724af2f464eSSteffen Klassert 1725af2f464eSSteffen Klassert x->preplay_esn = kmemdup(x->replay_esn, 1726af2f464eSSteffen Klassert xfrm_replay_state_esn_len(x->replay_esn), 1727af2f464eSSteffen Klassert GFP_KERNEL); 1728af2f464eSSteffen Klassert if (!x->preplay_esn) { 1729af2f464eSSteffen Klassert kfree(x->replay_esn); 1730af2f464eSSteffen Klassert return -ENOMEM; 1731af2f464eSSteffen Klassert } 1732af2f464eSSteffen Klassert 1733af2f464eSSteffen Klassert return 0; 1734af2f464eSSteffen Klassert } 1735af2f464eSSteffen Klassert 1736ee5c2317SSteffen Klassert static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig) 1737ee5c2317SSteffen Klassert { 1738ee5c2317SSteffen Klassert return kmemdup(orig, aead_len(orig), GFP_KERNEL); 1739ee5c2317SSteffen Klassert } 1740ee5c2317SSteffen Klassert 1741ee5c2317SSteffen Klassert 174280c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 174380c9abaaSShinta Sugimoto { 17440f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 174580c9abaaSShinta Sugimoto } 174680c9abaaSShinta Sugimoto 17474447bb33SMartin Willi static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) 17484447bb33SMartin Willi { 17494447bb33SMartin Willi return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); 17504447bb33SMartin Willi } 17514447bb33SMartin Willi 175280c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 175380c9abaaSShinta Sugimoto { 175480c9abaaSShinta Sugimoto int i; 175580c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 175680c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 175780c9abaaSShinta Sugimoto } 175880c9abaaSShinta Sugimoto 175980c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 176080c9abaaSShinta Sugimoto { 176180c9abaaSShinta Sugimoto int i; 176280c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 176380c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 176480c9abaaSShinta Sugimoto } 176580c9abaaSShinta Sugimoto #endif 1766f8cd5488SJamal Hadi Salim 1767def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 176800501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 176900501121SHerbert Xu { 177000501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 177100501121SHerbert Xu } 1772def8b4faSAlexey Dobriyan #endif 177300501121SHerbert Xu 1774bf825f81SJamal Hadi Salim static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) 1775bf825f81SJamal Hadi Salim { 1776bf825f81SJamal Hadi Salim if (attrs[XFRMA_MARK]) 17774efd7e83SAndreas Steffen memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); 1778bf825f81SJamal Hadi Salim else 1779bf825f81SJamal Hadi Salim m->v = m->m = 0; 1780bf825f81SJamal Hadi Salim 1781bf825f81SJamal Hadi Salim return m->v & m->m; 1782bf825f81SJamal Hadi Salim } 1783bf825f81SJamal Hadi Salim 1784e3dfa389SDavid S. Miller static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) 1785bf825f81SJamal Hadi Salim { 17861d1e34ddSDavid S. Miller int ret = 0; 1787bf825f81SJamal Hadi Salim 17881d1e34ddSDavid S. Miller if (m->m | m->v) 17891d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); 17901d1e34ddSDavid S. Miller return ret; 1791bf825f81SJamal Hadi Salim } 1792bf825f81SJamal Hadi Salim 179370be6c91SSteffen Klassert static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, 179470be6c91SSteffen Klassert unsigned int family) 179570be6c91SSteffen Klassert { 179670be6c91SSteffen Klassert bool tunnel = false; 179770be6c91SSteffen Klassert 179870be6c91SSteffen Klassert switch(family) { 179970be6c91SSteffen Klassert case AF_INET: 180070be6c91SSteffen Klassert if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) 180170be6c91SSteffen Klassert tunnel = true; 180270be6c91SSteffen Klassert break; 180370be6c91SSteffen Klassert case AF_INET6: 180470be6c91SSteffen Klassert if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) 180570be6c91SSteffen Klassert tunnel = true; 180670be6c91SSteffen Klassert break; 180770be6c91SSteffen Klassert } 180870be6c91SSteffen Klassert if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL)) 180970be6c91SSteffen Klassert return -EINVAL; 181070be6c91SSteffen Klassert 181170be6c91SSteffen Klassert return 0; 181270be6c91SSteffen Klassert } 18131da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1814