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 564a3e2f71SArjan van de Ven extern struct mutex xfrm_cfg_mutex; 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds /* Organization of SPD aka "XFRM rules" 591da177e4SLinus Torvalds ------------------------------------ 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds Basic objects: 621da177e4SLinus Torvalds - policy rule, struct xfrm_policy (=SPD entry) 631da177e4SLinus Torvalds - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) 641da177e4SLinus Torvalds - instance of a transformer, struct xfrm_state (=SA) 651da177e4SLinus Torvalds - template to clone xfrm_state, struct xfrm_tmpl 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds SPD is plain linear list of xfrm_policy rules, ordered by priority. 681da177e4SLinus Torvalds (To be compatible with existing pfkeyv2 implementations, 691da177e4SLinus Torvalds many rules with priority of 0x7fffffff are allowed to exist and 701da177e4SLinus Torvalds such rules are ordered in an unpredictable way, thanks to bsd folks.) 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds Lookup is plain linear search until the first match with selector. 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds If "action" is "block", then we prohibit the flow, otherwise: 751da177e4SLinus Torvalds if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, 761da177e4SLinus Torvalds policy entry has list of up to XFRM_MAX_DEPTH transformations, 771da177e4SLinus Torvalds described by templates xfrm_tmpl. Each template is resolved 781da177e4SLinus Torvalds to a complete xfrm_state (see below) and we pack bundle of transformations 791da177e4SLinus Torvalds to a dst_entry returned to requestor. 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds dst -. xfrm .-> xfrm_state #1 821da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #2 831da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #3 841da177e4SLinus Torvalds |---. child .-> NULL 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds Bundles are cached at xrfm_policy struct (field ->bundles). 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds Resolution of xrfm_tmpl 901da177e4SLinus Torvalds ----------------------- 911da177e4SLinus Torvalds Template contains: 921da177e4SLinus Torvalds 1. ->mode Mode: transport or tunnel 931da177e4SLinus Torvalds 2. ->id.proto Protocol: AH/ESP/IPCOMP 941da177e4SLinus Torvalds 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. 951da177e4SLinus Torvalds Q: allow to resolve security gateway? 961da177e4SLinus Torvalds 4. ->id.spi If not zero, static SPI. 971da177e4SLinus Torvalds 5. ->saddr Local tunnel endpoint, ignored for transport mode. 981da177e4SLinus Torvalds 6. ->algos List of allowed algos. Plain bitmask now. 991da177e4SLinus Torvalds Q: ealgos, aalgos, calgos. What a mess... 1001da177e4SLinus Torvalds 7. ->share Sharing mode. 1011da177e4SLinus Torvalds Q: how to implement private sharing mode? To add struct sock* to 1021da177e4SLinus Torvalds flow id? 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds Having this template we search through SAD searching for entries 1051da177e4SLinus Torvalds with appropriate mode/proto/algo, permitted by selector. 1061da177e4SLinus Torvalds If no appropriate entry found, it is requested from key manager. 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds PROBLEMS: 1091da177e4SLinus Torvalds Q: How to find all the bundles referring to a physical path for 1101da177e4SLinus Torvalds PMTU discovery? Seems, dst should contain list of all parents... 1111da177e4SLinus Torvalds and enter to infinite locking hierarchy disaster. 1121da177e4SLinus Torvalds No! It is easier, we will not search for them, let them find us. 1131da177e4SLinus Torvalds We add genid to each dst plus pointer to genid of raw IP route, 1141da177e4SLinus Torvalds pmtu disc will update pmtu on raw IP route and increase its genid. 1151da177e4SLinus Torvalds dst_check() will see this for top level and trigger resyncing 1161da177e4SLinus Torvalds metrics. Plus, it will be made via sk->sk_dst_cache. Solved. 1171da177e4SLinus Torvalds */ 1181da177e4SLinus Torvalds 11912a169e7SHerbert Xu struct xfrm_state_walk { 12012a169e7SHerbert Xu struct list_head all; 12112a169e7SHerbert Xu u8 state; 12212a169e7SHerbert Xu union { 12312a169e7SHerbert Xu u8 dying; 12412a169e7SHerbert Xu u8 proto; 12512a169e7SHerbert Xu }; 12612a169e7SHerbert Xu u32 seq; 12712a169e7SHerbert Xu }; 12812a169e7SHerbert Xu 1291da177e4SLinus Torvalds /* Full description of state of transformer. */ 130fd2c3ef7SEric Dumazet struct xfrm_state { 131673c09beSAlexey Dobriyan #ifdef CONFIG_NET_NS 132673c09beSAlexey Dobriyan struct net *xs_net; 133673c09beSAlexey Dobriyan #endif 134abb81c4fSHerbert Xu union { 13512a169e7SHerbert Xu struct hlist_node gclist; 1368f126e37SDavid S. Miller struct hlist_node bydst; 137abb81c4fSHerbert Xu }; 1388f126e37SDavid S. Miller struct hlist_node bysrc; 1398f126e37SDavid S. Miller struct hlist_node byspi; 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds atomic_t refcnt; 1421da177e4SLinus Torvalds spinlock_t lock; 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds struct xfrm_id id; 1451da177e4SLinus Torvalds struct xfrm_selector sel; 146bf825f81SJamal Hadi Salim struct xfrm_mark mark; 14735d2856bSMartin Willi u32 tfcpad; 1481da177e4SLinus Torvalds 1499d4a706dSDavid S. Miller u32 genid; 1509d4a706dSDavid S. Miller 15112a169e7SHerbert Xu /* Key manager bits */ 15212a169e7SHerbert Xu struct xfrm_state_walk km; 1531da177e4SLinus Torvalds 1541da177e4SLinus Torvalds /* Parameters of this state. */ 1551da177e4SLinus Torvalds struct { 1561da177e4SLinus Torvalds u32 reqid; 1571da177e4SLinus Torvalds u8 mode; 1581da177e4SLinus Torvalds u8 replay_window; 1591da177e4SLinus Torvalds u8 aalgo, ealgo, calgo; 1601da177e4SLinus Torvalds u8 flags; 1611da177e4SLinus Torvalds u16 family; 1621da177e4SLinus Torvalds xfrm_address_t saddr; 1631da177e4SLinus Torvalds int header_len; 1641da177e4SLinus Torvalds int trailer_len; 1651da177e4SLinus Torvalds } props; 1661da177e4SLinus Torvalds 1671da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds /* Data for transformer */ 1704447bb33SMartin Willi struct xfrm_algo_auth *aalg; 1711da177e4SLinus Torvalds struct xfrm_algo *ealg; 1721da177e4SLinus Torvalds struct xfrm_algo *calg; 1731a6509d9SHerbert Xu struct xfrm_algo_aead *aead; 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds /* Data for encapsulator */ 1761da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 1771da177e4SLinus Torvalds 178060f02a3SNoriaki TAKAMIYA /* Data for care-of address */ 179060f02a3SNoriaki TAKAMIYA xfrm_address_t *coaddr; 180060f02a3SNoriaki TAKAMIYA 1811da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1821da177e4SLinus Torvalds struct xfrm_state *tunnel; 1831da177e4SLinus Torvalds 1841da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1851da177e4SLinus Torvalds atomic_t tunnel_users; 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds /* State for replay detection */ 1881da177e4SLinus Torvalds struct xfrm_replay_state replay; 1899736acf3SSteffen Klassert struct xfrm_replay_state_esn *replay_esn; 1901da177e4SLinus Torvalds 191f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 192f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 1939736acf3SSteffen Klassert struct xfrm_replay_state_esn *preplay_esn; 194f8cd5488SJamal Hadi Salim 1959fdc4883SSteffen Klassert /* The functions for replay detection. */ 1969fdc4883SSteffen Klassert struct xfrm_replay *repl; 1979fdc4883SSteffen Klassert 1982717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 1992717096aSJamal Hadi Salim * moment 2002717096aSJamal Hadi Salim */ 2012717096aSJamal Hadi Salim u32 xflags; 2022717096aSJamal Hadi Salim 203f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 204f8cd5488SJamal Hadi Salim u32 replay_maxage; 205f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 206f8cd5488SJamal Hadi Salim 207f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 208f8cd5488SJamal Hadi Salim struct timer_list rtimer; 209f8cd5488SJamal Hadi Salim 2101da177e4SLinus Torvalds /* Statistics */ 2111da177e4SLinus Torvalds struct xfrm_stats stats; 2121da177e4SLinus Torvalds 2131da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 2149e0d57fdSYury Polyanskiy struct tasklet_hrtimer mtimer; 2151da177e4SLinus Torvalds 216e3c0d047SFan Du /* used to fix curlft->add_time when changing date */ 217e3c0d047SFan Du long saved_tmo; 218e3c0d047SFan Du 2199afaca05SMasahide NAKAMURA /* Last used time */ 220d26f3984SHerbert Xu unsigned long lastused; 2219afaca05SMasahide NAKAMURA 2221da177e4SLinus Torvalds /* Reference to data common to all the instances of this 2231da177e4SLinus Torvalds * transformer. */ 224533cb5b0SEric Dumazet const struct xfrm_type *type; 22513996378SHerbert Xu struct xfrm_mode *inner_mode; 226df9dcb45SKazunori MIYAZAWA struct xfrm_mode *inner_mode_iaf; 22713996378SHerbert Xu struct xfrm_mode *outer_mode; 2281da177e4SLinus Torvalds 229df71837dSTrent Jaeger /* Security context */ 230df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 231df71837dSTrent Jaeger 2321da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 2331da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 2341da177e4SLinus Torvalds void *data; 2351da177e4SLinus Torvalds }; 2361da177e4SLinus Torvalds 237673c09beSAlexey Dobriyan static inline struct net *xs_net(struct xfrm_state *x) 238673c09beSAlexey Dobriyan { 239673c09beSAlexey Dobriyan return read_pnet(&x->xs_net); 240673c09beSAlexey Dobriyan } 241673c09beSAlexey Dobriyan 2422717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2432717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 244e3c0d047SFan Du #define XFRM_SOFT_EXPIRE 2 2452717096aSJamal Hadi Salim 2461da177e4SLinus Torvalds enum { 2471da177e4SLinus Torvalds XFRM_STATE_VOID, 2481da177e4SLinus Torvalds XFRM_STATE_ACQ, 2491da177e4SLinus Torvalds XFRM_STATE_VALID, 2501da177e4SLinus Torvalds XFRM_STATE_ERROR, 2511da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2521da177e4SLinus Torvalds XFRM_STATE_DEAD 2531da177e4SLinus Torvalds }; 2541da177e4SLinus Torvalds 25526b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 256fd2c3ef7SEric Dumazet struct km_event { 257bf08867fSHerbert Xu union { 258bf08867fSHerbert Xu u32 hard; 259bf08867fSHerbert Xu u32 proto; 260bf08867fSHerbert Xu u32 byid; 261f8cd5488SJamal Hadi Salim u32 aevent; 262f7b6983fSMasahide NAKAMURA u32 type; 263bf08867fSHerbert Xu } data; 264bf08867fSHerbert Xu 26526b15dadSJamal Hadi Salim u32 seq; 26626b15dadSJamal Hadi Salim u32 pid; 26726b15dadSJamal Hadi Salim u32 event; 2687067802eSAlexey Dobriyan struct net *net; 26926b15dadSJamal Hadi Salim }; 27026b15dadSJamal Hadi Salim 2719fdc4883SSteffen Klassert struct xfrm_replay { 2729fdc4883SSteffen Klassert void (*advance)(struct xfrm_state *x, __be32 net_seq); 2739fdc4883SSteffen Klassert int (*check)(struct xfrm_state *x, 2749fdc4883SSteffen Klassert struct sk_buff *skb, 2759fdc4883SSteffen Klassert __be32 net_seq); 2763b59df46SSteffen Klassert int (*recheck)(struct xfrm_state *x, 2773b59df46SSteffen Klassert struct sk_buff *skb, 2783b59df46SSteffen Klassert __be32 net_seq); 2799fdc4883SSteffen Klassert void (*notify)(struct xfrm_state *x, int event); 2809fdc4883SSteffen Klassert int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); 2819fdc4883SSteffen Klassert }; 2829fdc4883SSteffen Klassert 28325ee3286SHerbert Xu struct net_device; 2841da177e4SLinus Torvalds struct xfrm_type; 2851da177e4SLinus Torvalds struct xfrm_dst; 2861da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2871da177e4SLinus Torvalds unsigned short family; 2881da177e4SLinus Torvalds struct dst_ops *dst_ops; 289ddcfd796SAlexey Dobriyan void (*garbage_collect)(struct net *net); 290c5b3cf46SAlexey Dobriyan struct dst_entry *(*dst_lookup)(struct net *net, int tos, 2915e6b930fSDavid S. Miller const xfrm_address_t *saddr, 2925e6b930fSDavid S. Miller const xfrm_address_t *daddr); 293fbda33b2SAlexey Dobriyan int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr); 2941da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 295d5422efeSHerbert Xu struct flowi *fl, 296d5422efeSHerbert Xu int reverse); 29705d84025SDavid S. Miller int (*get_tos)(const struct flowi *fl); 2989d7b0fc1SPatrick McHardy void (*init_dst)(struct net *net, 2999d7b0fc1SPatrick McHardy struct xfrm_dst *dst); 300a1b05140SMasahide NAKAMURA int (*init_path)(struct xfrm_dst *path, 301a1b05140SMasahide NAKAMURA struct dst_entry *dst, 302a1b05140SMasahide NAKAMURA int nfheader_len); 30325ee3286SHerbert Xu int (*fill_dst)(struct xfrm_dst *xdst, 30487c1e12bSHerbert Xu struct net_device *dev, 3050c7b3eefSDavid S. Miller const struct flowi *fl); 3062774c131SDavid S. Miller struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); 3071da177e4SLinus Torvalds }; 3081da177e4SLinus Torvalds 3091da177e4SLinus Torvalds extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 3101da177e4SLinus Torvalds extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 311214e005bSDavid S. Miller extern void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c); 312214e005bSDavid S. Miller extern void km_state_notify(struct xfrm_state *x, const struct km_event *c); 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds struct xfrm_tmpl; 315980ebd25SJamal Hadi Salim extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 31653bc6b4dSJamal Hadi Salim extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); 31753bc6b4dSJamal Hadi Salim extern int __xfrm_state_delete(struct xfrm_state *x); 31853bc6b4dSJamal Hadi Salim 3191da177e4SLinus Torvalds struct xfrm_state_afinfo { 32017c2a42aSHerbert Xu unsigned int family; 32136cf9acfSHerbert Xu unsigned int proto; 3228e3d716cSAl Viro __be16 eth_proto; 32317c2a42aSHerbert Xu struct module *owner; 324533cb5b0SEric Dumazet const struct xfrm_type *type_map[IPPROTO_MAX]; 325aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 326d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 32773e5ebb2SDavid S. Miller void (*init_tempsel)(struct xfrm_selector *sel, 32873e5ebb2SDavid S. Miller const struct flowi *fl); 32919bd6244SDavid S. Miller void (*init_temprop)(struct xfrm_state *x, 33019bd6244SDavid S. Miller const struct xfrm_tmpl *tmpl, 33119bd6244SDavid S. Miller const xfrm_address_t *daddr, 33219bd6244SDavid S. Miller const xfrm_address_t *saddr); 33341a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 33441a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 335cdca7265SMiika Komu int (*output)(struct sk_buff *skb); 33643a4dea4SSteffen Klassert int (*output_finish)(struct sk_buff *skb); 337227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 338227620e2SHerbert Xu struct sk_buff *skb); 33936cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 34036cf9acfSHerbert Xu struct sk_buff *skb); 341716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 342716062fdSHerbert Xu int async); 3431da177e4SLinus Torvalds }; 3441da177e4SLinus Torvalds 3451da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 3461da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 3471da177e4SLinus Torvalds 3481da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 3491da177e4SLinus Torvalds 350fd2c3ef7SEric Dumazet struct xfrm_type { 3511da177e4SLinus Torvalds char *description; 3521da177e4SLinus Torvalds struct module *owner; 353a6337463Sjamal u8 proto; 354a6337463Sjamal u8 flags; 3551b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 356436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 357f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 358f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3591da177e4SLinus Torvalds 36072cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 3611da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 362e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3631da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 3648f029de2SDavid S. Miller int (*reject)(struct xfrm_state *, struct sk_buff *, 3658f029de2SDavid S. Miller const struct flowi *); 366aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3671da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 368c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3691da177e4SLinus Torvalds }; 3701da177e4SLinus Torvalds 371533cb5b0SEric Dumazet extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 372533cb5b0SEric Dumazet extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 3731da177e4SLinus Torvalds 374b59f45d0SHerbert Xu struct xfrm_mode { 375227620e2SHerbert Xu /* 376227620e2SHerbert Xu * Remove encapsulation header. 377227620e2SHerbert Xu * 378227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 379227620e2SHerbert Xu * header. 380227620e2SHerbert Xu * 381227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 382227620e2SHerbert Xu * should be and the network header shall be set to where the IP 383227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 384227620e2SHerbert Xu * payload. 385227620e2SHerbert Xu */ 386227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 387227620e2SHerbert Xu 388227620e2SHerbert Xu /* 389227620e2SHerbert Xu * This is the actual input entry point. 390227620e2SHerbert Xu * 391227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 392227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 393227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 394227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 395227620e2SHerbert Xu */ 396b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 39737fedd3aSHerbert Xu 39837fedd3aSHerbert Xu /* 39937fedd3aSHerbert Xu * Add encapsulation header. 40037fedd3aSHerbert Xu * 40137fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 40237fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 40337fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 40437fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 40537fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 40637fedd3aSHerbert Xu * header. The value of the network header will always point 40737fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 40837fedd3aSHerbert Xu */ 40936cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 41036cf9acfSHerbert Xu 41136cf9acfSHerbert Xu /* 41236cf9acfSHerbert Xu * This is the actual output entry point. 41336cf9acfSHerbert Xu * 41436cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 41536cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 41636cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 41736cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 41836cf9acfSHerbert Xu * call output2. 41936cf9acfSHerbert Xu */ 420eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 421b59f45d0SHerbert Xu 42217c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 423b59f45d0SHerbert Xu struct module *owner; 424b59f45d0SHerbert Xu unsigned int encap; 4251bfcb10fSHerbert Xu int flags; 4261bfcb10fSHerbert Xu }; 4271bfcb10fSHerbert Xu 4281bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 4291bfcb10fSHerbert Xu enum { 4301bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 431b59f45d0SHerbert Xu }; 432b59f45d0SHerbert Xu 433b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 434b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 435b59f45d0SHerbert Xu 436df9dcb45SKazunori MIYAZAWA static inline int xfrm_af2proto(unsigned int family) 437df9dcb45SKazunori MIYAZAWA { 438df9dcb45SKazunori MIYAZAWA switch(family) { 439df9dcb45SKazunori MIYAZAWA case AF_INET: 440df9dcb45SKazunori MIYAZAWA return IPPROTO_IPIP; 441df9dcb45SKazunori MIYAZAWA case AF_INET6: 442df9dcb45SKazunori MIYAZAWA return IPPROTO_IPV6; 443df9dcb45SKazunori MIYAZAWA default: 444df9dcb45SKazunori MIYAZAWA return 0; 445df9dcb45SKazunori MIYAZAWA } 446df9dcb45SKazunori MIYAZAWA } 447df9dcb45SKazunori MIYAZAWA 448df9dcb45SKazunori MIYAZAWA static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) 449df9dcb45SKazunori MIYAZAWA { 450df9dcb45SKazunori MIYAZAWA if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || 451df9dcb45SKazunori MIYAZAWA (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) 452df9dcb45SKazunori MIYAZAWA return x->inner_mode; 453df9dcb45SKazunori MIYAZAWA else 454df9dcb45SKazunori MIYAZAWA return x->inner_mode_iaf; 455df9dcb45SKazunori MIYAZAWA } 456df9dcb45SKazunori MIYAZAWA 457fd2c3ef7SEric Dumazet struct xfrm_tmpl { 4581da177e4SLinus Torvalds /* id in template is interpreted as: 4591da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 4601da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 4611da177e4SLinus Torvalds * daddr must be fixed too. 4621da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 4631da177e4SLinus Torvalds */ 4641da177e4SLinus Torvalds struct xfrm_id id; 4651da177e4SLinus Torvalds 4661da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 4671da177e4SLinus Torvalds xfrm_address_t saddr; 4681da177e4SLinus Torvalds 46976b3f055SMiika Komu unsigned short encap_family; 47076b3f055SMiika Komu 471a6337463Sjamal u32 reqid; 4721da177e4SLinus Torvalds 4737e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 474a6337463Sjamal u8 mode; 4751da177e4SLinus Torvalds 4761da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 477a6337463Sjamal u8 share; 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 480a6337463Sjamal u8 optional; 4811da177e4SLinus Torvalds 482c5d18e98SHerbert Xu /* Skip aalgos/ealgos/calgos checks. */ 483a6337463Sjamal u8 allalgs; 484c5d18e98SHerbert Xu 4851da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 486a6337463Sjamal u32 aalgos; 487a6337463Sjamal u32 ealgos; 488a6337463Sjamal u32 calgos; 4891da177e4SLinus Torvalds }; 4901da177e4SLinus Torvalds 491622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 4921da177e4SLinus Torvalds 49312a169e7SHerbert Xu struct xfrm_policy_walk_entry { 49412a169e7SHerbert Xu struct list_head all; 49512a169e7SHerbert Xu u8 dead; 49612a169e7SHerbert Xu }; 49712a169e7SHerbert Xu 49812a169e7SHerbert Xu struct xfrm_policy_walk { 49912a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 50012a169e7SHerbert Xu u8 type; 50112a169e7SHerbert Xu u32 seq; 50212a169e7SHerbert Xu }; 50312a169e7SHerbert Xu 504fd2c3ef7SEric Dumazet struct xfrm_policy { 5050331b1f3SAlexey Dobriyan #ifdef CONFIG_NET_NS 5060331b1f3SAlexey Dobriyan struct net *xp_net; 5070331b1f3SAlexey Dobriyan #endif 5082518c7c2SDavid S. Miller struct hlist_node bydst; 5092518c7c2SDavid S. Miller struct hlist_node byidx; 5101da177e4SLinus Torvalds 5111da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 5121da177e4SLinus Torvalds rwlock_t lock; 5131da177e4SLinus Torvalds atomic_t refcnt; 5141da177e4SLinus Torvalds struct timer_list timer; 5151da177e4SLinus Torvalds 516fe1a5f03STimo Teräs struct flow_cache_object flo; 51780c802f3STimo Teräs atomic_t genid; 5181da177e4SLinus Torvalds u32 priority; 5191da177e4SLinus Torvalds u32 index; 520bf825f81SJamal Hadi Salim struct xfrm_mark mark; 5211da177e4SLinus Torvalds struct xfrm_selector selector; 5221da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 5231da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 52412a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 52546ca5f5dSArnaldo Carvalho de Melo u8 type; 52646ca5f5dSArnaldo Carvalho de Melo u8 action; 52746ca5f5dSArnaldo Carvalho de Melo u8 flags; 52846ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 52912a169e7SHerbert Xu u16 family; 530df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 5311da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 5321da177e4SLinus Torvalds }; 5331da177e4SLinus Torvalds 53463eb23f5SDavid S. Miller static inline struct net *xp_net(const struct xfrm_policy *xp) 5350331b1f3SAlexey Dobriyan { 5360331b1f3SAlexey Dobriyan return read_pnet(&xp->xp_net); 5370331b1f3SAlexey Dobriyan } 5380331b1f3SAlexey Dobriyan 53913c1d189SArnaud Ebalard struct xfrm_kmaddress { 54013c1d189SArnaud Ebalard xfrm_address_t local; 54113c1d189SArnaud Ebalard xfrm_address_t remote; 54213c1d189SArnaud Ebalard u32 reserved; 54313c1d189SArnaud Ebalard u16 family; 54413c1d189SArnaud Ebalard }; 54513c1d189SArnaud Ebalard 54680c9abaaSShinta Sugimoto struct xfrm_migrate { 54780c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 54880c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 54980c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 55080c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 55180c9abaaSShinta Sugimoto u8 proto; 55280c9abaaSShinta Sugimoto u8 mode; 55380c9abaaSShinta Sugimoto u16 reserved; 55480c9abaaSShinta Sugimoto u32 reqid; 55580c9abaaSShinta Sugimoto u16 old_family; 55680c9abaaSShinta Sugimoto u16 new_family; 55780c9abaaSShinta Sugimoto }; 55880c9abaaSShinta Sugimoto 5591da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 560f8cd5488SJamal Hadi Salim /* which seqno */ 561f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 562f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 563f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 564f8cd5488SJamal Hadi Salim /* what happened */ 565f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 566f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 567f8cd5488SJamal Hadi Salim 568f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 569f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 570f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 571f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 572f8cd5488SJamal Hadi Salim /* default seq threshold size */ 573f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 5741da177e4SLinus Torvalds 575fd2c3ef7SEric Dumazet struct xfrm_mgr { 5761da177e4SLinus Torvalds struct list_head list; 5771da177e4SLinus Torvalds char *id; 578214e005bSDavid S. Miller int (*notify)(struct xfrm_state *x, const struct km_event *c); 5791da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 580cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 5815d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 582214e005bSDavid S. Miller int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); 583db983c11SAlexey Dobriyan int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 584183cad12SDavid S. Miller int (*migrate)(const struct xfrm_selector *sel, 585183cad12SDavid S. Miller u8 dir, u8 type, 586183cad12SDavid S. Miller const struct xfrm_migrate *m, 587183cad12SDavid S. Miller int num_bundles, 588183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 5891da177e4SLinus Torvalds }; 5901da177e4SLinus Torvalds 5911da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 5921da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 5931da177e4SLinus Torvalds 594436a0a40SHerbert Xu /* 595436a0a40SHerbert Xu * This structure is used for the duration where packets are being 596436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 597436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 598436a0a40SHerbert Xu */ 599436a0a40SHerbert Xu struct xfrm_skb_cb { 600436a0a40SHerbert Xu union { 601436a0a40SHerbert Xu struct inet_skb_parm h4; 602436a0a40SHerbert Xu struct inet6_skb_parm h6; 603436a0a40SHerbert Xu } header; 604436a0a40SHerbert Xu 605436a0a40SHerbert Xu /* Sequence number for replay protection. */ 606b318e0e4SHerbert Xu union { 6071ce3644aSSteffen Klassert struct { 6081ce3644aSSteffen Klassert __u32 low; 6091ce3644aSSteffen Klassert __u32 hi; 6101ce3644aSSteffen Klassert } output; 6111ce3644aSSteffen Klassert struct { 6121ce3644aSSteffen Klassert __be32 low; 6131ce3644aSSteffen Klassert __be32 hi; 6141ce3644aSSteffen Klassert } input; 615b318e0e4SHerbert Xu } seq; 616436a0a40SHerbert Xu }; 617436a0a40SHerbert Xu 618436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 619436a0a40SHerbert Xu 62036cf9acfSHerbert Xu /* 62136cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 62236cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 62336cf9acfSHerbert Xu */ 62436cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 62536cf9acfSHerbert Xu union { 62636cf9acfSHerbert Xu struct inet_skb_parm h4; 62736cf9acfSHerbert Xu struct inet6_skb_parm h6; 62836cf9acfSHerbert Xu } header; 62936cf9acfSHerbert Xu 63036cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 63136cf9acfSHerbert Xu __be16 id; 63236cf9acfSHerbert Xu __be16 frag_off; 63336cf9acfSHerbert Xu 634732c8bd5SHerbert Xu /* IP header length (excluding options or extension headers). */ 635732c8bd5SHerbert Xu u8 ihl; 636732c8bd5SHerbert Xu 63736cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 63836cf9acfSHerbert Xu u8 tos; 63936cf9acfSHerbert Xu 64036cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 64136cf9acfSHerbert Xu u8 ttl; 64236cf9acfSHerbert Xu 64336cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 64436cf9acfSHerbert Xu u8 protocol; 64536cf9acfSHerbert Xu 646732c8bd5SHerbert Xu /* Option length for IPv4, zero for IPv6. */ 647732c8bd5SHerbert Xu u8 optlen; 648732c8bd5SHerbert Xu 64936cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 65036cf9acfSHerbert Xu u8 flow_lbl[3]; 65136cf9acfSHerbert Xu }; 65236cf9acfSHerbert Xu 65336cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 65436cf9acfSHerbert Xu 655716062fdSHerbert Xu /* 656716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 657716062fdSHerbert Xu * related information. 658716062fdSHerbert Xu */ 659716062fdSHerbert Xu struct xfrm_spi_skb_cb { 660716062fdSHerbert Xu union { 661716062fdSHerbert Xu struct inet_skb_parm h4; 662716062fdSHerbert Xu struct inet6_skb_parm h6; 663716062fdSHerbert Xu } header; 664716062fdSHerbert Xu 665716062fdSHerbert Xu unsigned int daddroff; 6662fcb45b6SHerbert Xu unsigned int family; 667716062fdSHerbert Xu }; 668716062fdSHerbert Xu 669716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 670716062fdSHerbert Xu 671161a09e7SJoy Latten /* Audit Information */ 672fd2c3ef7SEric Dumazet struct xfrm_audit { 673161a09e7SJoy Latten u32 secid; 6742532386fSEric Paris uid_t loginuid; 6752532386fSEric Paris u32 sessionid; 676161a09e7SJoy Latten }; 677c9204d9cSJoy Latten 678c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 679afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 680ab5f5e8bSJoy Latten { 681ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 682ab5f5e8bSJoy Latten 683afeb14b4SPaul Moore if (audit_enabled == 0) 684afeb14b4SPaul Moore return NULL; 685ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 686ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 687ab5f5e8bSJoy Latten if (audit_buf == NULL) 688ab5f5e8bSJoy Latten return NULL; 689afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 690afeb14b4SPaul Moore return audit_buf; 691afeb14b4SPaul Moore } 692afeb14b4SPaul Moore 6932532386fSEric Paris static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid, 694afeb14b4SPaul Moore struct audit_buffer *audit_buf) 695afeb14b4SPaul Moore { 696afeb14b4SPaul Moore char *secctx; 697afeb14b4SPaul Moore u32 secctx_len; 698ab5f5e8bSJoy Latten 6992532386fSEric Paris audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); 70068277accSPaul Moore if (secid != 0 && 70168277accSPaul Moore security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { 702ab5f5e8bSJoy Latten audit_log_format(audit_buf, " subj=%s", secctx); 703ab5f5e8bSJoy Latten security_release_secctx(secctx, secctx_len); 704ab5f5e8bSJoy Latten } else 705ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 706ab5f5e8bSJoy Latten } 707ab5f5e8bSJoy Latten 708ab5f5e8bSJoy Latten extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 7092532386fSEric Paris u32 auid, u32 ses, u32 secid); 710ab5f5e8bSJoy Latten extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 7112532386fSEric Paris u32 auid, u32 ses, u32 secid); 712ab5f5e8bSJoy Latten extern void xfrm_audit_state_add(struct xfrm_state *x, int result, 7132532386fSEric Paris u32 auid, u32 ses, u32 secid); 714ab5f5e8bSJoy Latten extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, 7152532386fSEric Paris u32 auid, u32 ses, u32 secid); 716afeb14b4SPaul Moore extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 717afeb14b4SPaul Moore struct sk_buff *skb); 7189fdc4883SSteffen Klassert extern void xfrm_audit_state_replay(struct xfrm_state *x, 7199fdc4883SSteffen Klassert struct sk_buff *skb, __be32 net_seq); 720afeb14b4SPaul Moore extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 721afeb14b4SPaul Moore extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 722afeb14b4SPaul Moore __be32 net_spi, __be32 net_seq); 723afeb14b4SPaul Moore extern void xfrm_audit_state_icvfail(struct xfrm_state *x, 724afeb14b4SPaul Moore struct sk_buff *skb, u8 proto); 725c9204d9cSJoy Latten #else 72641fef0eeSMarcin Slusarz 72741fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 72841fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 72941fef0eeSMarcin Slusarz { 73041fef0eeSMarcin Slusarz } 73141fef0eeSMarcin Slusarz 73241fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 73341fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 73441fef0eeSMarcin Slusarz { 73541fef0eeSMarcin Slusarz } 73641fef0eeSMarcin Slusarz 73741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, 73841fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 73941fef0eeSMarcin Slusarz { 74041fef0eeSMarcin Slusarz } 74141fef0eeSMarcin Slusarz 74241fef0eeSMarcin Slusarz static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, 74341fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 74441fef0eeSMarcin Slusarz { 74541fef0eeSMarcin Slusarz } 74641fef0eeSMarcin Slusarz 74741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 74841fef0eeSMarcin Slusarz struct sk_buff *skb) 74941fef0eeSMarcin Slusarz { 75041fef0eeSMarcin Slusarz } 75141fef0eeSMarcin Slusarz 7529fdc4883SSteffen Klassert static inline void xfrm_audit_state_replay(struct xfrm_state *x, 7539fdc4883SSteffen Klassert struct sk_buff *skb, __be32 net_seq) 7549fdc4883SSteffen Klassert { 7559fdc4883SSteffen Klassert } 7569fdc4883SSteffen Klassert 75741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, 75841fef0eeSMarcin Slusarz u16 family) 75941fef0eeSMarcin Slusarz { 76041fef0eeSMarcin Slusarz } 76141fef0eeSMarcin Slusarz 76241fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 76341fef0eeSMarcin Slusarz __be32 net_spi, __be32 net_seq) 76441fef0eeSMarcin Slusarz { 76541fef0eeSMarcin Slusarz } 76641fef0eeSMarcin Slusarz 76741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, 76841fef0eeSMarcin Slusarz struct sk_buff *skb, u8 proto) 76941fef0eeSMarcin Slusarz { 77041fef0eeSMarcin Slusarz } 771c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 772161a09e7SJoy Latten 7731da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 7741da177e4SLinus Torvalds { 7751da177e4SLinus Torvalds if (likely(policy != NULL)) 7761da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 7771da177e4SLinus Torvalds } 7781da177e4SLinus Torvalds 77964c31b3fSWANG Cong extern void xfrm_policy_destroy(struct xfrm_policy *policy); 7801da177e4SLinus Torvalds 7811da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 7821da177e4SLinus Torvalds { 7831da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 78464c31b3fSWANG Cong xfrm_policy_destroy(policy); 7851da177e4SLinus Torvalds } 7861da177e4SLinus Torvalds 7874e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7884e81bb83SMasahide NAKAMURA { 7894e81bb83SMasahide NAKAMURA int i; 7904e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 7914e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 7924e81bb83SMasahide NAKAMURA } 7934e81bb83SMasahide NAKAMURA 7941da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 7951da177e4SLinus Torvalds 79621380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 79721380b81SHerbert Xu { 79821380b81SHerbert Xu atomic_dec(&x->refcnt); 79921380b81SHerbert Xu } 80021380b81SHerbert Xu 8011da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 8021da177e4SLinus Torvalds { 8031da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 8041da177e4SLinus Torvalds __xfrm_state_destroy(x); 8051da177e4SLinus Torvalds } 8061da177e4SLinus Torvalds 8071da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 8081da177e4SLinus Torvalds { 8091da177e4SLinus Torvalds atomic_inc(&x->refcnt); 8101da177e4SLinus Torvalds } 8111da177e4SLinus Torvalds 8121744a8feSDavid S. Miller static inline bool addr_match(const void *token1, const void *token2, 8131744a8feSDavid S. Miller int prefixlen) 8141da177e4SLinus Torvalds { 8151744a8feSDavid S. Miller const __be32 *a1 = token1; 8161744a8feSDavid S. Miller const __be32 *a2 = token2; 8171da177e4SLinus Torvalds int pdw; 8181da177e4SLinus Torvalds int pbi; 8191da177e4SLinus Torvalds 820a6337463Sjamal pdw = prefixlen >> 5; /* num of whole u32 in prefix */ 8211da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds if (pdw) 8241da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 8251744a8feSDavid S. Miller return false; 8261da177e4SLinus Torvalds 8271da177e4SLinus Torvalds if (pbi) { 8285f19343fSAl Viro __be32 mask; 8291da177e4SLinus Torvalds 8301da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 8311da177e4SLinus Torvalds 8321da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 8331744a8feSDavid S. Miller return false; 8341da177e4SLinus Torvalds } 8351da177e4SLinus Torvalds 8361744a8feSDavid S. Miller return true; 8371da177e4SLinus Torvalds } 8381da177e4SLinus Torvalds 83926bff940SAlexey Dobriyan static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) 84026bff940SAlexey Dobriyan { 84126bff940SAlexey Dobriyan /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ 84226bff940SAlexey Dobriyan if (prefixlen == 0) 84326bff940SAlexey Dobriyan return true; 84426bff940SAlexey Dobriyan return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen))); 84526bff940SAlexey Dobriyan } 84626bff940SAlexey Dobriyan 8471da177e4SLinus Torvalds static __inline__ 8486281dcc9SDavid S. Miller __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) 8491da177e4SLinus Torvalds { 850f9d07e41SAl Viro __be16 port; 8511d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8521da177e4SLinus Torvalds case IPPROTO_TCP: 8531da177e4SLinus Torvalds case IPPROTO_UDP: 854ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8551da177e4SLinus Torvalds case IPPROTO_SCTP: 8566281dcc9SDavid S. Miller port = uli->ports.sport; 8571da177e4SLinus Torvalds break; 8581da177e4SLinus Torvalds case IPPROTO_ICMP: 8591da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8606281dcc9SDavid S. Miller port = htons(uli->icmpt.type); 8611da177e4SLinus Torvalds break; 8622ce4272aSMasahide NAKAMURA case IPPROTO_MH: 8636281dcc9SDavid S. Miller port = htons(uli->mht.type); 8642ce4272aSMasahide NAKAMURA break; 865cc9ff19dSTimo Teräs case IPPROTO_GRE: 8666281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) >> 16); 867cc9ff19dSTimo Teräs break; 8681da177e4SLinus Torvalds default: 8691da177e4SLinus Torvalds port = 0; /*XXX*/ 8701da177e4SLinus Torvalds } 8711da177e4SLinus Torvalds return port; 8721da177e4SLinus Torvalds } 8731da177e4SLinus Torvalds 8741da177e4SLinus Torvalds static __inline__ 8756281dcc9SDavid S. Miller __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) 8761da177e4SLinus Torvalds { 877f9d07e41SAl Viro __be16 port; 8781d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8791da177e4SLinus Torvalds case IPPROTO_TCP: 8801da177e4SLinus Torvalds case IPPROTO_UDP: 881ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8821da177e4SLinus Torvalds case IPPROTO_SCTP: 8836281dcc9SDavid S. Miller port = uli->ports.dport; 8841da177e4SLinus Torvalds break; 8851da177e4SLinus Torvalds case IPPROTO_ICMP: 8861da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8876281dcc9SDavid S. Miller port = htons(uli->icmpt.code); 8881da177e4SLinus Torvalds break; 889cc9ff19dSTimo Teräs case IPPROTO_GRE: 8906281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) & 0xffff); 891cc9ff19dSTimo Teräs break; 8921da177e4SLinus Torvalds default: 8931da177e4SLinus Torvalds port = 0; /*XXX*/ 8941da177e4SLinus Torvalds } 8951da177e4SLinus Torvalds return port; 8961da177e4SLinus Torvalds } 8971da177e4SLinus Torvalds 898bc9b35adSDavid S. Miller extern bool xfrm_selector_match(const struct xfrm_selector *sel, 899e1ad2ab2SDavid S. Miller const struct flowi *fl, 90077681021SAndrew Morton unsigned short family); 9011da177e4SLinus Torvalds 902df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 903df71837dSTrent Jaeger /* If neither has a context --> match 904df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 905df71837dSTrent Jaeger */ 906bc9b35adSDavid S. Miller static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 907df71837dSTrent Jaeger { 908df71837dSTrent Jaeger return ((!s1 && !s2) || 909df71837dSTrent Jaeger (s1 && s2 && 910df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 911df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 912df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 913df71837dSTrent Jaeger } 914df71837dSTrent Jaeger #else 915bc9b35adSDavid S. Miller static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 916df71837dSTrent Jaeger { 917bc9b35adSDavid S. Miller return true; 918df71837dSTrent Jaeger } 919df71837dSTrent Jaeger #endif 920df71837dSTrent Jaeger 9211da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 9221da177e4SLinus Torvalds * 9231da177e4SLinus Torvalds * dst->child points to the next element of bundle. 9241da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 9251da177e4SLinus Torvalds * 9261da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 9271da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 9281da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 9291da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 9301da177e4SLinus Torvalds * policy rule. 9311da177e4SLinus Torvalds */ 932fd2c3ef7SEric Dumazet struct xfrm_dst { 9331da177e4SLinus Torvalds union { 9341da177e4SLinus Torvalds struct dst_entry dst; 9351da177e4SLinus Torvalds struct rtable rt; 9361da177e4SLinus Torvalds struct rt6_info rt6; 9371da177e4SLinus Torvalds } u; 9381da177e4SLinus Torvalds struct dst_entry *route; 93980c802f3STimo Teräs struct flow_cache_object flo; 94080c802f3STimo Teräs struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; 94180c802f3STimo Teräs int num_pols, num_xfrms; 942157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 943157bfc25SMasahide NAKAMURA struct flowi *origin; 944157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 945157bfc25SMasahide NAKAMURA #endif 94680c802f3STimo Teräs u32 xfrm_genid; 94780c802f3STimo Teräs u32 policy_genid; 9481da177e4SLinus Torvalds u32 route_mtu_cached; 9491da177e4SLinus Torvalds u32 child_mtu_cached; 95092d63decSHideaki YOSHIFUJI u32 route_cookie; 95192d63decSHideaki YOSHIFUJI u32 path_cookie; 9521da177e4SLinus Torvalds }; 9531da177e4SLinus Torvalds 954def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 955aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 956aabc9761SHerbert Xu { 95780c802f3STimo Teräs xfrm_pols_put(xdst->pols, xdst->num_pols); 958aabc9761SHerbert Xu dst_release(xdst->route); 959aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 960aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 961157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 962157bfc25SMasahide NAKAMURA kfree(xdst->origin); 963157bfc25SMasahide NAKAMURA xdst->origin = NULL; 964157bfc25SMasahide NAKAMURA kfree(xdst->partner); 965157bfc25SMasahide NAKAMURA xdst->partner = NULL; 966157bfc25SMasahide NAKAMURA #endif 967aabc9761SHerbert Xu } 968def8b4faSAlexey Dobriyan #endif 969aabc9761SHerbert Xu 970aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 971aabc9761SHerbert Xu 972fd2c3ef7SEric Dumazet struct sec_path { 9731da177e4SLinus Torvalds atomic_t refcnt; 9741da177e4SLinus Torvalds int len; 975dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 9761da177e4SLinus Torvalds }; 9771da177e4SLinus Torvalds 978990078afSMichael Smith static inline int secpath_exists(struct sk_buff *skb) 979990078afSMichael Smith { 980990078afSMichael Smith #ifdef CONFIG_XFRM 981990078afSMichael Smith return skb->sp != NULL; 982990078afSMichael Smith #else 983990078afSMichael Smith return 0; 984990078afSMichael Smith #endif 985990078afSMichael Smith } 986990078afSMichael Smith 9871da177e4SLinus Torvalds static inline struct sec_path * 9881da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 9891da177e4SLinus Torvalds { 9901da177e4SLinus Torvalds if (sp) 9911da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 9921da177e4SLinus Torvalds return sp; 9931da177e4SLinus Torvalds } 9941da177e4SLinus Torvalds 9951da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 9961da177e4SLinus Torvalds 9971da177e4SLinus Torvalds static inline void 9981da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 9991da177e4SLinus Torvalds { 10001da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 10011da177e4SLinus Torvalds __secpath_destroy(sp); 10021da177e4SLinus Torvalds } 10031da177e4SLinus Torvalds 10041da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 10051da177e4SLinus Torvalds 10061da177e4SLinus Torvalds static inline void 10071da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 10081da177e4SLinus Torvalds { 10091da177e4SLinus Torvalds #ifdef CONFIG_XFRM 10101da177e4SLinus Torvalds secpath_put(skb->sp); 10111da177e4SLinus Torvalds skb->sp = NULL; 10121da177e4SLinus Torvalds #endif 10131da177e4SLinus Torvalds } 10141da177e4SLinus Torvalds 10151da177e4SLinus Torvalds static inline int 10166cc32961SDavid S. Miller xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) 1017a1e59abfSPatrick McHardy { 1018a1e59abfSPatrick McHardy switch (family) { 1019a1e59abfSPatrick McHardy case AF_INET: 1020a1e59abfSPatrick McHardy return addr->a4 == 0; 1021a1e59abfSPatrick McHardy case AF_INET6: 1022a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 1023a1e59abfSPatrick McHardy } 1024a1e59abfSPatrick McHardy return 0; 1025a1e59abfSPatrick McHardy } 1026a1e59abfSPatrick McHardy 1027a1e59abfSPatrick McHardy static inline int 102821eddb5cSDavid S. Miller __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 10291da177e4SLinus Torvalds { 10301da177e4SLinus Torvalds return (tmpl->saddr.a4 && 10311da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 10321da177e4SLinus Torvalds } 10331da177e4SLinus Torvalds 10341da177e4SLinus Torvalds static inline int 103521eddb5cSDavid S. Miller __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 10361da177e4SLinus Torvalds { 10371da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 10381da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 10391da177e4SLinus Torvalds } 10401da177e4SLinus Torvalds 10411da177e4SLinus Torvalds static inline int 104221eddb5cSDavid S. Miller xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) 10431da177e4SLinus Torvalds { 10441da177e4SLinus Torvalds switch (family) { 10451da177e4SLinus Torvalds case AF_INET: 10461da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 10471da177e4SLinus Torvalds case AF_INET6: 10481da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 10491da177e4SLinus Torvalds } 10501da177e4SLinus Torvalds return !0; 10511da177e4SLinus Torvalds } 10521da177e4SLinus Torvalds 10531da177e4SLinus Torvalds #ifdef CONFIG_XFRM 10541da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 10551da177e4SLinus Torvalds 1056d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 1057d5422efeSHerbert Xu struct sk_buff *skb, 1058d5422efeSHerbert Xu unsigned int family, int reverse) 10591da177e4SLinus Torvalds { 1060f6e1e25dSAlexey Dobriyan struct net *net = dev_net(skb->dev); 1061d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 1062d5422efeSHerbert Xu 10631da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 1064d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 10651da177e4SLinus Torvalds 1066f6e1e25dSAlexey Dobriyan return (!net->xfrm.policy_count[dir] && !skb->sp) || 1067adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOPOLICY) || 1068d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 1069d5422efeSHerbert Xu } 1070d5422efeSHerbert Xu 1071d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 1072d5422efeSHerbert Xu { 1073d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 10741da177e4SLinus Torvalds } 10751da177e4SLinus Torvalds 10761da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10771da177e4SLinus Torvalds { 10781da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 10791da177e4SLinus Torvalds } 10801da177e4SLinus Torvalds 10811da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10821da177e4SLinus Torvalds { 10831da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 10841da177e4SLinus Torvalds } 10851da177e4SLinus Torvalds 1086d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1087d5422efeSHerbert Xu struct sk_buff *skb) 1088d5422efeSHerbert Xu { 1089d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 1090d5422efeSHerbert Xu } 1091d5422efeSHerbert Xu 1092d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1093d5422efeSHerbert Xu struct sk_buff *skb) 1094d5422efeSHerbert Xu { 1095d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 1096d5422efeSHerbert Xu } 1097d5422efeSHerbert Xu 1098d5422efeSHerbert Xu extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1099d5422efeSHerbert Xu unsigned int family, int reverse); 1100d5422efeSHerbert Xu 1101d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1102d5422efeSHerbert Xu unsigned int family) 1103d5422efeSHerbert Xu { 1104d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 1105d5422efeSHerbert Xu } 1106d5422efeSHerbert Xu 1107d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1108d5422efeSHerbert Xu struct flowi *fl, 1109d5422efeSHerbert Xu unsigned int family) 1110d5422efeSHerbert Xu { 1111d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 1112d5422efeSHerbert Xu } 1113d5422efeSHerbert Xu 11141da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 11151da177e4SLinus Torvalds 11161da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 11171da177e4SLinus Torvalds { 111899a66657SAlexey Dobriyan struct net *net = dev_net(skb->dev); 111999a66657SAlexey Dobriyan 112099a66657SAlexey Dobriyan return !net->xfrm.policy_count[XFRM_POLICY_OUT] || 1121adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOXFRM) || 11221da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 11231da177e4SLinus Torvalds } 11241da177e4SLinus Torvalds 11251da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 11261da177e4SLinus Torvalds { 11271da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 11281da177e4SLinus Torvalds } 11291da177e4SLinus Torvalds 11301da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 11311da177e4SLinus Torvalds { 11321da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 11331da177e4SLinus Torvalds } 11341da177e4SLinus Torvalds 11351da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 11361da177e4SLinus Torvalds 11371da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 11381da177e4SLinus Torvalds { 11391da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 11401da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 11411da177e4SLinus Torvalds return 0; 11421da177e4SLinus Torvalds } 11431da177e4SLinus Torvalds 11444666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 11451da177e4SLinus Torvalds 11461da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 11471da177e4SLinus Torvalds { 11481da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 11491da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 11501da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 11511da177e4SLinus Torvalds } 11521da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 11531da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 11541da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 11551da177e4SLinus Torvalds } 11561da177e4SLinus Torvalds } 11571da177e4SLinus Torvalds 11581da177e4SLinus Torvalds #else 11591da177e4SLinus Torvalds 11601da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 11611da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 11621da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 11631da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 11641da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11651da177e4SLinus Torvalds { 11661da177e4SLinus Torvalds return 1; 11671da177e4SLinus Torvalds } 11681da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11691da177e4SLinus Torvalds { 11701da177e4SLinus Torvalds return 1; 11711da177e4SLinus Torvalds } 11721da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 11731da177e4SLinus Torvalds { 11741da177e4SLinus Torvalds return 1; 11751da177e4SLinus Torvalds } 1176d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1177d5422efeSHerbert Xu struct flowi *fl, 1178d5422efeSHerbert Xu unsigned int family) 1179d5422efeSHerbert Xu { 1180d5422efeSHerbert Xu return -ENOSYS; 1181d5422efeSHerbert Xu } 1182d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1183d5422efeSHerbert Xu struct sk_buff *skb) 1184d5422efeSHerbert Xu { 1185d5422efeSHerbert Xu return 1; 1186d5422efeSHerbert Xu } 1187d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1188d5422efeSHerbert Xu struct sk_buff *skb) 1189d5422efeSHerbert Xu { 1190d5422efeSHerbert Xu return 1; 1191d5422efeSHerbert Xu } 11921da177e4SLinus Torvalds #endif 11931da177e4SLinus Torvalds 11941da177e4SLinus Torvalds static __inline__ 1195e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) 11961da177e4SLinus Torvalds { 11971da177e4SLinus Torvalds switch (family){ 11981da177e4SLinus Torvalds case AF_INET: 11997e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.daddr; 12001da177e4SLinus Torvalds case AF_INET6: 12017e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.daddr; 12021da177e4SLinus Torvalds } 12031da177e4SLinus Torvalds return NULL; 12041da177e4SLinus Torvalds } 12051da177e4SLinus Torvalds 12061da177e4SLinus Torvalds static __inline__ 1207e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) 12081da177e4SLinus Torvalds { 12091da177e4SLinus Torvalds switch (family){ 12101da177e4SLinus Torvalds case AF_INET: 12117e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.saddr; 12121da177e4SLinus Torvalds case AF_INET6: 12137e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.saddr; 12141da177e4SLinus Torvalds } 12151da177e4SLinus Torvalds return NULL; 12161da177e4SLinus Torvalds } 12171da177e4SLinus Torvalds 12189bb182a7SYOSHIFUJI Hideaki static __inline__ 1219e8a4e377SDavid S. Miller void xfrm_flowi_addr_get(const struct flowi *fl, 12209bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 12219bb182a7SYOSHIFUJI Hideaki unsigned short family) 12229bb182a7SYOSHIFUJI Hideaki { 12239bb182a7SYOSHIFUJI Hideaki switch(family) { 12249bb182a7SYOSHIFUJI Hideaki case AF_INET: 12257e1dc7b6SDavid S. Miller memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); 12267e1dc7b6SDavid S. Miller memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); 12279bb182a7SYOSHIFUJI Hideaki break; 12289bb182a7SYOSHIFUJI Hideaki case AF_INET6: 12294e3fd7a0SAlexey Dobriyan *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr; 12304e3fd7a0SAlexey Dobriyan *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr; 12319bb182a7SYOSHIFUJI Hideaki break; 12329bb182a7SYOSHIFUJI Hideaki } 12339bb182a7SYOSHIFUJI Hideaki } 12349bb182a7SYOSHIFUJI Hideaki 12351da177e4SLinus Torvalds static __inline__ int 1236f8848067SDavid S. Miller __xfrm4_state_addr_check(const struct xfrm_state *x, 1237f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 12381da177e4SLinus Torvalds { 12391da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 12401da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 12411da177e4SLinus Torvalds return 1; 12421da177e4SLinus Torvalds return 0; 12431da177e4SLinus Torvalds } 12441da177e4SLinus Torvalds 12451da177e4SLinus Torvalds static __inline__ int 1246f8848067SDavid S. Miller __xfrm6_state_addr_check(const struct xfrm_state *x, 1247f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 12481da177e4SLinus Torvalds { 12491da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 12501da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 12511da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 12521da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 12531da177e4SLinus Torvalds return 1; 12541da177e4SLinus Torvalds return 0; 12551da177e4SLinus Torvalds } 12561da177e4SLinus Torvalds 12571da177e4SLinus Torvalds static __inline__ int 1258f8848067SDavid S. Miller xfrm_state_addr_check(const struct xfrm_state *x, 1259f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr, 12601da177e4SLinus Torvalds unsigned short family) 12611da177e4SLinus Torvalds { 12621da177e4SLinus Torvalds switch (family) { 12631da177e4SLinus Torvalds case AF_INET: 12641da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 12651da177e4SLinus Torvalds case AF_INET6: 12661da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 12671da177e4SLinus Torvalds } 12681da177e4SLinus Torvalds return 0; 12691da177e4SLinus Torvalds } 12701da177e4SLinus Torvalds 1271e53820deSMasahide NAKAMURA static __inline__ int 1272f8848067SDavid S. Miller xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, 1273e53820deSMasahide NAKAMURA unsigned short family) 1274e53820deSMasahide NAKAMURA { 1275e53820deSMasahide NAKAMURA switch (family) { 1276e53820deSMasahide NAKAMURA case AF_INET: 1277e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 12787e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.daddr, 12797e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.saddr); 1280e53820deSMasahide NAKAMURA case AF_INET6: 1281e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 12827e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.daddr, 12837e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.saddr); 1284e53820deSMasahide NAKAMURA } 1285e53820deSMasahide NAKAMURA return 0; 1286e53820deSMasahide NAKAMURA } 1287e53820deSMasahide NAKAMURA 1288f8848067SDavid S. Miller static inline int xfrm_state_kern(const struct xfrm_state *x) 12891da177e4SLinus Torvalds { 12901da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 12911da177e4SLinus Torvalds } 12921da177e4SLinus Torvalds 12935794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 12945794708fSMasahide NAKAMURA { 1295dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1296dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1297dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1298dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 12995794708fSMasahide NAKAMURA } 13005794708fSMasahide NAKAMURA 13011da177e4SLinus Torvalds /* 13021da177e4SLinus Torvalds * xfrm algorithm information 13031da177e4SLinus Torvalds */ 13041a6509d9SHerbert Xu struct xfrm_algo_aead_info { 13051a6509d9SHerbert Xu u16 icv_truncbits; 13061a6509d9SHerbert Xu }; 13071a6509d9SHerbert Xu 13081da177e4SLinus Torvalds struct xfrm_algo_auth_info { 13091da177e4SLinus Torvalds u16 icv_truncbits; 13101da177e4SLinus Torvalds u16 icv_fullbits; 13111da177e4SLinus Torvalds }; 13121da177e4SLinus Torvalds 13131da177e4SLinus Torvalds struct xfrm_algo_encr_info { 13141da177e4SLinus Torvalds u16 blockbits; 13151da177e4SLinus Torvalds u16 defkeybits; 13161da177e4SLinus Torvalds }; 13171da177e4SLinus Torvalds 13181da177e4SLinus Torvalds struct xfrm_algo_comp_info { 13191da177e4SLinus Torvalds u16 threshold; 13201da177e4SLinus Torvalds }; 13211da177e4SLinus Torvalds 13221da177e4SLinus Torvalds struct xfrm_algo_desc { 13231da177e4SLinus Torvalds char *name; 132404ff1260SHerbert Xu char *compat; 13251da177e4SLinus Torvalds u8 available:1; 13261da177e4SLinus Torvalds union { 13271a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 13281da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 13291da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 13301da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 13311da177e4SLinus Torvalds } uinfo; 13321da177e4SLinus Torvalds struct sadb_alg desc; 13331da177e4SLinus Torvalds }; 13341da177e4SLinus Torvalds 13351da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 13361da177e4SLinus Torvalds struct xfrm_tunnel { 13371da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1338a6337463Sjamal int (*err_handler)(struct sk_buff *skb, u32 info); 1339d2acc347SHerbert Xu 1340b33eab08SEric Dumazet struct xfrm_tunnel __rcu *next; 1341d2acc347SHerbert Xu int priority; 13421da177e4SLinus Torvalds }; 13431da177e4SLinus Torvalds 13441da177e4SLinus Torvalds struct xfrm6_tunnel { 1345d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1346d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 1347d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info); 13486f0bcf15SEric Dumazet struct xfrm6_tunnel __rcu *next; 1349d2acc347SHerbert Xu int priority; 13501da177e4SLinus Torvalds }; 13511da177e4SLinus Torvalds 13521da177e4SLinus Torvalds extern void xfrm_init(void); 1353a33bc5c1SNeil Horman extern void xfrm4_init(int rt_hash_size); 1354d62ddc21SAlexey Dobriyan extern int xfrm_state_init(struct net *net); 1355d62ddc21SAlexey Dobriyan extern void xfrm_state_fini(struct net *net); 13561da177e4SLinus Torvalds extern void xfrm4_state_init(void); 1357c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1358c35b7e72SDaniel Lezcano extern int xfrm6_init(void); 1359c35b7e72SDaniel Lezcano extern void xfrm6_fini(void); 13600013cabaSDaniel Lezcano extern int xfrm6_state_init(void); 13611da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 1362c35b7e72SDaniel Lezcano #else 1363c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1364c35b7e72SDaniel Lezcano { 1365c35b7e72SDaniel Lezcano return 0; 1366c35b7e72SDaniel Lezcano } 1367c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1368c35b7e72SDaniel Lezcano { 1369c35b7e72SDaniel Lezcano ; 1370c35b7e72SDaniel Lezcano } 1371c35b7e72SDaniel Lezcano #endif 13721da177e4SLinus Torvalds 1373558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1374c68cd1a0SAlexey Dobriyan extern int xfrm_proc_init(struct net *net); 1375c68cd1a0SAlexey Dobriyan extern void xfrm_proc_fini(struct net *net); 1376558f82efSMasahide NAKAMURA #endif 1377558f82efSMasahide NAKAMURA 1378b27aeadbSAlexey Dobriyan extern int xfrm_sysctl_init(struct net *net); 1379b27aeadbSAlexey Dobriyan #ifdef CONFIG_SYSCTL 1380b27aeadbSAlexey Dobriyan extern void xfrm_sysctl_fini(struct net *net); 1381b27aeadbSAlexey Dobriyan #else 1382b27aeadbSAlexey Dobriyan static inline void xfrm_sysctl_fini(struct net *net) 1383b27aeadbSAlexey Dobriyan { 1384b27aeadbSAlexey Dobriyan } 1385b27aeadbSAlexey Dobriyan #endif 1386b27aeadbSAlexey Dobriyan 13875c182458SHerbert Xu extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); 1388284fa7daSAlexey Dobriyan extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 13894c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1390abb81c4fSHerbert Xu extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); 1391673c09beSAlexey Dobriyan extern struct xfrm_state *xfrm_state_alloc(struct net *net); 139233765d06SDavid S. Miller extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, 139333765d06SDavid S. Miller const xfrm_address_t *saddr, 1394b520e9f6SDavid S. Miller const struct flowi *fl, 1395b520e9f6SDavid S. Miller struct xfrm_tmpl *tmpl, 13961da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 13971da177e4SLinus Torvalds unsigned short family); 1398bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, 13995447c5e4SAlexey Dobriyan xfrm_address_t *daddr, 1400628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1401628529b6SJamal Hadi Salim unsigned short family, 1402628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 14031da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 14041da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 14051da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 14061da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1407bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, 1408a70486f0SDavid S. Miller const xfrm_address_t *daddr, __be32 spi, 1409bd55775cSJamal Hadi Salim u8 proto, unsigned short family); 1410bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, 1411a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1412a70486f0SDavid S. Miller const xfrm_address_t *saddr, 1413bd55775cSJamal Hadi Salim u8 proto, 1414bd55775cSJamal Hadi Salim unsigned short family); 141541a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 141641a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 141741a49cc3SMasahide NAKAMURA int n, unsigned short family); 141841a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 141941a49cc3SMasahide NAKAMURA int n, unsigned short family); 142041a49cc3SMasahide NAKAMURA #else 142141a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 142241a49cc3SMasahide NAKAMURA int n, unsigned short family) 142341a49cc3SMasahide NAKAMURA { 142441a49cc3SMasahide NAKAMURA return -ENOSYS; 142541a49cc3SMasahide NAKAMURA } 142641a49cc3SMasahide NAKAMURA 142741a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 142841a49cc3SMasahide NAKAMURA int n, unsigned short family) 142941a49cc3SMasahide NAKAMURA { 143041a49cc3SMasahide NAKAMURA return -ENOSYS; 143141a49cc3SMasahide NAKAMURA } 143241a49cc3SMasahide NAKAMURA #endif 1433af11e316SJamal Hadi Salim 1434af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1435af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1436af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1437af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1438af11e316SJamal Hadi Salim }; 1439af11e316SJamal Hadi Salim 14405a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 14415a6d3416SJamal Hadi Salim u32 incnt; 14425a6d3416SJamal Hadi Salim u32 outcnt; 14435a6d3416SJamal Hadi Salim u32 fwdcnt; 14445a6d3416SJamal Hadi Salim u32 inscnt; 14455a6d3416SJamal Hadi Salim u32 outscnt; 14465a6d3416SJamal Hadi Salim u32 fwdscnt; 14475a6d3416SJamal Hadi Salim u32 spdhcnt; 14485a6d3416SJamal Hadi Salim u32 spdhmcnt; 14495a6d3416SJamal Hadi Salim }; 14505a6d3416SJamal Hadi Salim 1451bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, 1452bd55775cSJamal Hadi Salim u32 seq); 145326b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 14540e602451SAlexey Dobriyan extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); 1455e071041bSAlexey Dobriyan extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); 1456e071041bSAlexey Dobriyan extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); 14572cd08467SSteffen Klassert extern u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); 14589fdc4883SSteffen Klassert extern int xfrm_init_replay(struct xfrm_state *x); 14591da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 1460a454f0ccSWei Yongjun extern int __xfrm_init_state(struct xfrm_state *x, bool init_replay); 146172cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1462227620e2SHerbert Xu extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1463716062fdSHerbert Xu extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, 1464716062fdSHerbert Xu int encap_type); 14651bf06cd2SHerbert Xu extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1466c6581a45SHerbert Xu extern int xfrm_output_resume(struct sk_buff *skb, int err); 1467406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 1468df9dcb45SKazunori MIYAZAWA extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 146936cf9acfSHerbert Xu extern int xfrm4_extract_header(struct sk_buff *skb); 1470227620e2SHerbert Xu extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1471c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1472c4541b41SHerbert Xu int encap_type); 1473716062fdSHerbert Xu extern int xfrm4_transport_finish(struct sk_buff *skb, int async); 14741da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1475c4541b41SHerbert Xu 1476c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1477c4541b41SHerbert Xu { 1478c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1479c4541b41SHerbert Xu } 1480c4541b41SHerbert Xu 148136cf9acfSHerbert Xu extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 148236cf9acfSHerbert Xu extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14831da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 148443a4dea4SSteffen Klassert extern int xfrm4_output_finish(struct sk_buff *skb); 1485c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1486c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 1487eb8637cdSSaurabh extern int xfrm4_mode_tunnel_input_register(struct xfrm_tunnel *handler); 1488eb8637cdSSaurabh extern int xfrm4_mode_tunnel_input_deregister(struct xfrm_tunnel *handler); 148936cf9acfSHerbert Xu extern int xfrm6_extract_header(struct sk_buff *skb); 1490227620e2SHerbert Xu extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 149133b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1492716062fdSHerbert Xu extern int xfrm6_transport_finish(struct sk_buff *skb, int async); 1493e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1494fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1495fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 149673d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 149773d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 1498a1664773SAlexey Dobriyan extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); 1499b71d1d42SEric Dumazet extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); 150036cf9acfSHerbert Xu extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 150136cf9acfSHerbert Xu extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 15021da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 150343a4dea4SSteffen Klassert extern int xfrm6_output_finish(struct sk_buff *skb); 1504aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1505aee5adb4SMasahide NAKAMURA u8 **prevhdr); 15061da177e4SLinus Torvalds 15071da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1508067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 15091da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 15101da177e4SLinus Torvalds #else 15111da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 15121da177e4SLinus Torvalds { 15131da177e4SLinus Torvalds return -ENOPROTOOPT; 15141da177e4SLinus Torvalds } 15151da177e4SLinus Torvalds 1516067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 15171da177e4SLinus Torvalds { 15181da177e4SLinus Torvalds /* should not happen */ 15191da177e4SLinus Torvalds kfree_skb(skb); 15201da177e4SLinus Torvalds return 0; 15211da177e4SLinus Torvalds } 15221da177e4SLinus Torvalds #endif 15231da177e4SLinus Torvalds 15240331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 15254c563f76STimo Teras 152612a169e7SHerbert Xu extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 1527cdcbca7cSAlexey Dobriyan extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, 15284c563f76STimo Teras int (*func)(struct xfrm_policy *, int, int, void*), void *); 152912a169e7SHerbert Xu extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); 15301da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 15318ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, 15328ca2e93bSJamal Hadi Salim u8 type, int dir, 15334e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1534ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1535ef41aaa0SEric Paris int *err); 15368ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err); 153733ffbbd5SAlexey Dobriyan int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); 15381da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1539658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 1540bd55775cSJamal Hadi Salim struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark, 1541bd55775cSJamal Hadi Salim u8 mode, u32 reqid, u8 proto, 1542a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1543a70486f0SDavid S. Miller const xfrm_address_t *saddr, int create, 1544bd55775cSJamal Hadi Salim unsigned short family); 15451da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 15461da177e4SLinus Torvalds 154780c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1548183cad12SDavid S. Miller extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 1549183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_bundles, 1550183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 155180c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 155280c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 155380c9abaaSShinta Sugimoto struct xfrm_migrate *m); 1554b4b7c0b3SDavid S. Miller extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 155513c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 155613c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 155780c9abaaSShinta Sugimoto #endif 155880c9abaaSShinta Sugimoto 15595d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 15606c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 1561db983c11SAlexey Dobriyan extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 15621da177e4SLinus Torvalds 15631da177e4SLinus Torvalds extern void xfrm_input_init(void); 15646067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 15651da177e4SLinus Torvalds 15661da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 15671da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 15681da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 15691da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 15701da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 15711da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 15721da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 15731da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 15746f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); 15756f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); 15766f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); 15776f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, 15781a6509d9SHerbert Xu int probe); 15791da177e4SLinus Torvalds 1580ff6acd16SDavid S. Miller static inline int xfrm_addr_cmp(const xfrm_address_t *a, 1581ff6acd16SDavid S. Miller const xfrm_address_t *b, 15821da177e4SLinus Torvalds int family) 15831da177e4SLinus Torvalds { 15841da177e4SLinus Torvalds switch (family) { 15851da177e4SLinus Torvalds default: 15861da177e4SLinus Torvalds case AF_INET: 1587a6337463Sjamal return (__force u32)a->a4 - (__force u32)b->a4; 15881da177e4SLinus Torvalds case AF_INET6: 1589b71d1d42SEric Dumazet return ipv6_addr_cmp((const struct in6_addr *)a, 1590b71d1d42SEric Dumazet (const struct in6_addr *)b); 15911da177e4SLinus Torvalds } 15921da177e4SLinus Torvalds } 15931da177e4SLinus Torvalds 159477d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 159577d8d7a6SHerbert Xu { 159677d8d7a6SHerbert Xu return index & 7; 159777d8d7a6SHerbert Xu } 159877d8d7a6SHerbert Xu 1599a6483b79SAlexey Dobriyan #ifdef CONFIG_XFRM 1600a6483b79SAlexey Dobriyan static inline int xfrm_aevent_is_on(struct net *net) 1601f8cd5488SJamal Hadi Salim { 1602be33690dSPatrick McHardy struct sock *nlsk; 1603be33690dSPatrick McHardy int ret = 0; 1604be33690dSPatrick McHardy 1605be33690dSPatrick McHardy rcu_read_lock(); 1606a6483b79SAlexey Dobriyan nlsk = rcu_dereference(net->xfrm.nlsk); 1607be33690dSPatrick McHardy if (nlsk) 1608be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1609be33690dSPatrick McHardy rcu_read_unlock(); 1610be33690dSPatrick McHardy return ret; 1611f8cd5488SJamal Hadi Salim } 1612a6483b79SAlexey Dobriyan #endif 1613f8cd5488SJamal Hadi Salim 161485158621SDavid S. Miller static inline int xfrm_alg_len(const struct xfrm_algo *alg) 16150f99be0dSEric Dumazet { 16160f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 16170f99be0dSEric Dumazet } 16180f99be0dSEric Dumazet 161985158621SDavid S. Miller static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) 16204447bb33SMartin Willi { 16214447bb33SMartin Willi return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 16224447bb33SMartin Willi } 16234447bb33SMartin Willi 16249736acf3SSteffen Klassert static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) 16259736acf3SSteffen Klassert { 16269736acf3SSteffen Klassert return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); 16279736acf3SSteffen Klassert } 16289736acf3SSteffen Klassert 162980c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1630af2f464eSSteffen Klassert static inline int xfrm_replay_clone(struct xfrm_state *x, 1631af2f464eSSteffen Klassert struct xfrm_state *orig) 1632af2f464eSSteffen Klassert { 1633af2f464eSSteffen Klassert x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), 1634af2f464eSSteffen Klassert GFP_KERNEL); 1635af2f464eSSteffen Klassert if (!x->replay_esn) 1636af2f464eSSteffen Klassert return -ENOMEM; 1637af2f464eSSteffen Klassert 1638af2f464eSSteffen Klassert x->replay_esn->bmp_len = orig->replay_esn->bmp_len; 1639af2f464eSSteffen Klassert x->replay_esn->replay_window = orig->replay_esn->replay_window; 1640af2f464eSSteffen Klassert 1641af2f464eSSteffen Klassert x->preplay_esn = kmemdup(x->replay_esn, 1642af2f464eSSteffen Klassert xfrm_replay_state_esn_len(x->replay_esn), 1643af2f464eSSteffen Klassert GFP_KERNEL); 1644af2f464eSSteffen Klassert if (!x->preplay_esn) { 1645af2f464eSSteffen Klassert kfree(x->replay_esn); 1646af2f464eSSteffen Klassert return -ENOMEM; 1647af2f464eSSteffen Klassert } 1648af2f464eSSteffen Klassert 1649af2f464eSSteffen Klassert return 0; 1650af2f464eSSteffen Klassert } 1651af2f464eSSteffen Klassert 165280c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 165380c9abaaSShinta Sugimoto { 16540f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 165580c9abaaSShinta Sugimoto } 165680c9abaaSShinta Sugimoto 16574447bb33SMartin Willi static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) 16584447bb33SMartin Willi { 16594447bb33SMartin Willi return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); 16604447bb33SMartin Willi } 16614447bb33SMartin Willi 166280c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 166380c9abaaSShinta Sugimoto { 166480c9abaaSShinta Sugimoto int i; 166580c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 166680c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 166780c9abaaSShinta Sugimoto } 166880c9abaaSShinta Sugimoto 166980c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 167080c9abaaSShinta Sugimoto { 167180c9abaaSShinta Sugimoto int i; 167280c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 167380c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 167480c9abaaSShinta Sugimoto } 167580c9abaaSShinta Sugimoto #endif 1676f8cd5488SJamal Hadi Salim 1677def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 167800501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 167900501121SHerbert Xu { 168000501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 168100501121SHerbert Xu } 1682def8b4faSAlexey Dobriyan #endif 168300501121SHerbert Xu 1684bf825f81SJamal Hadi Salim static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) 1685bf825f81SJamal Hadi Salim { 1686bf825f81SJamal Hadi Salim if (attrs[XFRMA_MARK]) 16874efd7e83SAndreas Steffen memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); 1688bf825f81SJamal Hadi Salim else 1689bf825f81SJamal Hadi Salim m->v = m->m = 0; 1690bf825f81SJamal Hadi Salim 1691bf825f81SJamal Hadi Salim return m->v & m->m; 1692bf825f81SJamal Hadi Salim } 1693bf825f81SJamal Hadi Salim 1694e3dfa389SDavid S. Miller static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) 1695bf825f81SJamal Hadi Salim { 16961d1e34ddSDavid S. Miller int ret = 0; 1697bf825f81SJamal Hadi Salim 16981d1e34ddSDavid S. Miller if (m->m | m->v) 16991d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); 17001d1e34ddSDavid S. Miller return ret; 1701bf825f81SJamal Hadi Salim } 1702bf825f81SJamal Hadi Salim 17031da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1704