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); 2769fdc4883SSteffen Klassert void (*notify)(struct xfrm_state *x, int event); 2779fdc4883SSteffen Klassert int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); 2789fdc4883SSteffen Klassert }; 2799fdc4883SSteffen Klassert 28025ee3286SHerbert Xu struct net_device; 2811da177e4SLinus Torvalds struct xfrm_type; 2821da177e4SLinus Torvalds struct xfrm_dst; 2831da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2841da177e4SLinus Torvalds unsigned short family; 2851da177e4SLinus Torvalds struct dst_ops *dst_ops; 286ddcfd796SAlexey Dobriyan void (*garbage_collect)(struct net *net); 287c5b3cf46SAlexey Dobriyan struct dst_entry *(*dst_lookup)(struct net *net, int tos, 2885e6b930fSDavid S. Miller const xfrm_address_t *saddr, 2895e6b930fSDavid S. Miller const xfrm_address_t *daddr); 290fbda33b2SAlexey Dobriyan int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr); 2911da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 292d5422efeSHerbert Xu struct flowi *fl, 293d5422efeSHerbert Xu int reverse); 29405d84025SDavid S. Miller int (*get_tos)(const struct flowi *fl); 295a1b05140SMasahide NAKAMURA int (*init_path)(struct xfrm_dst *path, 296a1b05140SMasahide NAKAMURA struct dst_entry *dst, 297a1b05140SMasahide NAKAMURA int nfheader_len); 29825ee3286SHerbert Xu int (*fill_dst)(struct xfrm_dst *xdst, 29987c1e12bSHerbert Xu struct net_device *dev, 3000c7b3eefSDavid S. Miller const struct flowi *fl); 3012774c131SDavid S. Miller struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); 3021da177e4SLinus Torvalds }; 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 3051da177e4SLinus Torvalds extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 306214e005bSDavid S. Miller extern void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c); 307214e005bSDavid S. Miller extern void km_state_notify(struct xfrm_state *x, const struct km_event *c); 3081da177e4SLinus Torvalds 3091da177e4SLinus Torvalds struct xfrm_tmpl; 310980ebd25SJamal Hadi Salim extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 31153bc6b4dSJamal Hadi Salim extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); 31253bc6b4dSJamal Hadi Salim extern int __xfrm_state_delete(struct xfrm_state *x); 31353bc6b4dSJamal Hadi Salim 3141da177e4SLinus Torvalds struct xfrm_state_afinfo { 31517c2a42aSHerbert Xu unsigned int family; 31636cf9acfSHerbert Xu unsigned int proto; 3178e3d716cSAl Viro __be16 eth_proto; 31817c2a42aSHerbert Xu struct module *owner; 319533cb5b0SEric Dumazet const struct xfrm_type *type_map[IPPROTO_MAX]; 320aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 321d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 32273e5ebb2SDavid S. Miller void (*init_tempsel)(struct xfrm_selector *sel, 32373e5ebb2SDavid S. Miller const struct flowi *fl); 32419bd6244SDavid S. Miller void (*init_temprop)(struct xfrm_state *x, 32519bd6244SDavid S. Miller const struct xfrm_tmpl *tmpl, 32619bd6244SDavid S. Miller const xfrm_address_t *daddr, 32719bd6244SDavid S. Miller const xfrm_address_t *saddr); 32841a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 32941a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 330cdca7265SMiika Komu int (*output)(struct sk_buff *skb); 33143a4dea4SSteffen Klassert int (*output_finish)(struct sk_buff *skb); 332227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 333227620e2SHerbert Xu struct sk_buff *skb); 33436cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 33536cf9acfSHerbert Xu struct sk_buff *skb); 336716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 337716062fdSHerbert Xu int async); 3381da177e4SLinus Torvalds }; 3391da177e4SLinus Torvalds 3401da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 3411da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 3441da177e4SLinus Torvalds 345fd2c3ef7SEric Dumazet struct xfrm_type { 3461da177e4SLinus Torvalds char *description; 3471da177e4SLinus Torvalds struct module *owner; 348a6337463Sjamal u8 proto; 349a6337463Sjamal u8 flags; 3501b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 351436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 352f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 353f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3541da177e4SLinus Torvalds 35572cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 3561da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 357e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3581da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 3598f029de2SDavid S. Miller int (*reject)(struct xfrm_state *, struct sk_buff *, 3608f029de2SDavid S. Miller const struct flowi *); 361aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3621da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 363c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3641da177e4SLinus Torvalds }; 3651da177e4SLinus Torvalds 366533cb5b0SEric Dumazet extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 367533cb5b0SEric Dumazet extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 3681da177e4SLinus Torvalds 369b59f45d0SHerbert Xu struct xfrm_mode { 370227620e2SHerbert Xu /* 371227620e2SHerbert Xu * Remove encapsulation header. 372227620e2SHerbert Xu * 373227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 374227620e2SHerbert Xu * header. 375227620e2SHerbert Xu * 376227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 377227620e2SHerbert Xu * should be and the network header shall be set to where the IP 378227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 379227620e2SHerbert Xu * payload. 380227620e2SHerbert Xu */ 381227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 382227620e2SHerbert Xu 383227620e2SHerbert Xu /* 384227620e2SHerbert Xu * This is the actual input entry point. 385227620e2SHerbert Xu * 386227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 387227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 388227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 389227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 390227620e2SHerbert Xu */ 391b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 39237fedd3aSHerbert Xu 39337fedd3aSHerbert Xu /* 39437fedd3aSHerbert Xu * Add encapsulation header. 39537fedd3aSHerbert Xu * 39637fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 39737fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 39837fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 39937fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 40037fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 40137fedd3aSHerbert Xu * header. The value of the network header will always point 40237fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 40337fedd3aSHerbert Xu */ 40436cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 40536cf9acfSHerbert Xu 40636cf9acfSHerbert Xu /* 40736cf9acfSHerbert Xu * This is the actual output entry point. 40836cf9acfSHerbert Xu * 40936cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 41036cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 41136cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 41236cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 41336cf9acfSHerbert Xu * call output2. 41436cf9acfSHerbert Xu */ 415eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 416b59f45d0SHerbert Xu 41717c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 418b59f45d0SHerbert Xu struct module *owner; 419b59f45d0SHerbert Xu unsigned int encap; 4201bfcb10fSHerbert Xu int flags; 4211bfcb10fSHerbert Xu }; 4221bfcb10fSHerbert Xu 4231bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 4241bfcb10fSHerbert Xu enum { 4251bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 426b59f45d0SHerbert Xu }; 427b59f45d0SHerbert Xu 428b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 429b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 430b59f45d0SHerbert Xu 431df9dcb45SKazunori MIYAZAWA static inline int xfrm_af2proto(unsigned int family) 432df9dcb45SKazunori MIYAZAWA { 433df9dcb45SKazunori MIYAZAWA switch(family) { 434df9dcb45SKazunori MIYAZAWA case AF_INET: 435df9dcb45SKazunori MIYAZAWA return IPPROTO_IPIP; 436df9dcb45SKazunori MIYAZAWA case AF_INET6: 437df9dcb45SKazunori MIYAZAWA return IPPROTO_IPV6; 438df9dcb45SKazunori MIYAZAWA default: 439df9dcb45SKazunori MIYAZAWA return 0; 440df9dcb45SKazunori MIYAZAWA } 441df9dcb45SKazunori MIYAZAWA } 442df9dcb45SKazunori MIYAZAWA 443df9dcb45SKazunori MIYAZAWA static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) 444df9dcb45SKazunori MIYAZAWA { 445df9dcb45SKazunori MIYAZAWA if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || 446df9dcb45SKazunori MIYAZAWA (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) 447df9dcb45SKazunori MIYAZAWA return x->inner_mode; 448df9dcb45SKazunori MIYAZAWA else 449df9dcb45SKazunori MIYAZAWA return x->inner_mode_iaf; 450df9dcb45SKazunori MIYAZAWA } 451df9dcb45SKazunori MIYAZAWA 452fd2c3ef7SEric Dumazet struct xfrm_tmpl { 4531da177e4SLinus Torvalds /* id in template is interpreted as: 4541da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 4551da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 4561da177e4SLinus Torvalds * daddr must be fixed too. 4571da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 4581da177e4SLinus Torvalds */ 4591da177e4SLinus Torvalds struct xfrm_id id; 4601da177e4SLinus Torvalds 4611da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 4621da177e4SLinus Torvalds xfrm_address_t saddr; 4631da177e4SLinus Torvalds 46476b3f055SMiika Komu unsigned short encap_family; 46576b3f055SMiika Komu 466a6337463Sjamal u32 reqid; 4671da177e4SLinus Torvalds 4687e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 469a6337463Sjamal u8 mode; 4701da177e4SLinus Torvalds 4711da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 472a6337463Sjamal u8 share; 4731da177e4SLinus Torvalds 4741da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 475a6337463Sjamal u8 optional; 4761da177e4SLinus Torvalds 477c5d18e98SHerbert Xu /* Skip aalgos/ealgos/calgos checks. */ 478a6337463Sjamal u8 allalgs; 479c5d18e98SHerbert Xu 4801da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 481a6337463Sjamal u32 aalgos; 482a6337463Sjamal u32 ealgos; 483a6337463Sjamal u32 calgos; 4841da177e4SLinus Torvalds }; 4851da177e4SLinus Torvalds 486622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 4871da177e4SLinus Torvalds 48812a169e7SHerbert Xu struct xfrm_policy_walk_entry { 48912a169e7SHerbert Xu struct list_head all; 49012a169e7SHerbert Xu u8 dead; 49112a169e7SHerbert Xu }; 49212a169e7SHerbert Xu 49312a169e7SHerbert Xu struct xfrm_policy_walk { 49412a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 49512a169e7SHerbert Xu u8 type; 49612a169e7SHerbert Xu u32 seq; 49712a169e7SHerbert Xu }; 49812a169e7SHerbert Xu 499fd2c3ef7SEric Dumazet struct xfrm_policy { 5000331b1f3SAlexey Dobriyan #ifdef CONFIG_NET_NS 5010331b1f3SAlexey Dobriyan struct net *xp_net; 5020331b1f3SAlexey Dobriyan #endif 5032518c7c2SDavid S. Miller struct hlist_node bydst; 5042518c7c2SDavid S. Miller struct hlist_node byidx; 5051da177e4SLinus Torvalds 5061da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 5071da177e4SLinus Torvalds rwlock_t lock; 5081da177e4SLinus Torvalds atomic_t refcnt; 5091da177e4SLinus Torvalds struct timer_list timer; 5101da177e4SLinus Torvalds 511fe1a5f03STimo Teräs struct flow_cache_object flo; 51280c802f3STimo Teräs atomic_t genid; 5131da177e4SLinus Torvalds u32 priority; 5141da177e4SLinus Torvalds u32 index; 515bf825f81SJamal Hadi Salim struct xfrm_mark mark; 5161da177e4SLinus Torvalds struct xfrm_selector selector; 5171da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 5181da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 51912a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 52046ca5f5dSArnaldo Carvalho de Melo u8 type; 52146ca5f5dSArnaldo Carvalho de Melo u8 action; 52246ca5f5dSArnaldo Carvalho de Melo u8 flags; 52346ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 52412a169e7SHerbert Xu u16 family; 525df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 5261da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 5271da177e4SLinus Torvalds }; 5281da177e4SLinus Torvalds 52963eb23f5SDavid S. Miller static inline struct net *xp_net(const struct xfrm_policy *xp) 5300331b1f3SAlexey Dobriyan { 5310331b1f3SAlexey Dobriyan return read_pnet(&xp->xp_net); 5320331b1f3SAlexey Dobriyan } 5330331b1f3SAlexey Dobriyan 53413c1d189SArnaud Ebalard struct xfrm_kmaddress { 53513c1d189SArnaud Ebalard xfrm_address_t local; 53613c1d189SArnaud Ebalard xfrm_address_t remote; 53713c1d189SArnaud Ebalard u32 reserved; 53813c1d189SArnaud Ebalard u16 family; 53913c1d189SArnaud Ebalard }; 54013c1d189SArnaud Ebalard 54180c9abaaSShinta Sugimoto struct xfrm_migrate { 54280c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 54380c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 54480c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 54580c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 54680c9abaaSShinta Sugimoto u8 proto; 54780c9abaaSShinta Sugimoto u8 mode; 54880c9abaaSShinta Sugimoto u16 reserved; 54980c9abaaSShinta Sugimoto u32 reqid; 55080c9abaaSShinta Sugimoto u16 old_family; 55180c9abaaSShinta Sugimoto u16 new_family; 55280c9abaaSShinta Sugimoto }; 55380c9abaaSShinta Sugimoto 5541da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 555f8cd5488SJamal Hadi Salim /* which seqno */ 556f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 557f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 558f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 559f8cd5488SJamal Hadi Salim /* what happened */ 560f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 561f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 562f8cd5488SJamal Hadi Salim 563f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 564f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 565f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 566f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 567f8cd5488SJamal Hadi Salim /* default seq threshold size */ 568f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 5691da177e4SLinus Torvalds 570fd2c3ef7SEric Dumazet struct xfrm_mgr { 5711da177e4SLinus Torvalds struct list_head list; 5721da177e4SLinus Torvalds char *id; 573214e005bSDavid S. Miller int (*notify)(struct xfrm_state *x, const struct km_event *c); 5741da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 575cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 5765d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 577214e005bSDavid S. Miller int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); 578db983c11SAlexey Dobriyan int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 579183cad12SDavid S. Miller int (*migrate)(const struct xfrm_selector *sel, 580183cad12SDavid S. Miller u8 dir, u8 type, 581183cad12SDavid S. Miller const struct xfrm_migrate *m, 582183cad12SDavid S. Miller int num_bundles, 583183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 5841da177e4SLinus Torvalds }; 5851da177e4SLinus Torvalds 5861da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 5871da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 5881da177e4SLinus Torvalds 589436a0a40SHerbert Xu /* 590436a0a40SHerbert Xu * This structure is used for the duration where packets are being 591436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 592436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 593436a0a40SHerbert Xu */ 594436a0a40SHerbert Xu struct xfrm_skb_cb { 595436a0a40SHerbert Xu union { 596436a0a40SHerbert Xu struct inet_skb_parm h4; 597436a0a40SHerbert Xu struct inet6_skb_parm h6; 598436a0a40SHerbert Xu } header; 599436a0a40SHerbert Xu 600436a0a40SHerbert Xu /* Sequence number for replay protection. */ 601b318e0e4SHerbert Xu union { 6021ce3644aSSteffen Klassert struct { 6031ce3644aSSteffen Klassert __u32 low; 6041ce3644aSSteffen Klassert __u32 hi; 6051ce3644aSSteffen Klassert } output; 6061ce3644aSSteffen Klassert struct { 6071ce3644aSSteffen Klassert __be32 low; 6081ce3644aSSteffen Klassert __be32 hi; 6091ce3644aSSteffen Klassert } input; 610b318e0e4SHerbert Xu } seq; 611436a0a40SHerbert Xu }; 612436a0a40SHerbert Xu 613436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 614436a0a40SHerbert Xu 61536cf9acfSHerbert Xu /* 61636cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 61736cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 61836cf9acfSHerbert Xu */ 61936cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 62036cf9acfSHerbert Xu union { 62136cf9acfSHerbert Xu struct inet_skb_parm h4; 62236cf9acfSHerbert Xu struct inet6_skb_parm h6; 62336cf9acfSHerbert Xu } header; 62436cf9acfSHerbert Xu 62536cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 62636cf9acfSHerbert Xu __be16 id; 62736cf9acfSHerbert Xu __be16 frag_off; 62836cf9acfSHerbert Xu 629732c8bd5SHerbert Xu /* IP header length (excluding options or extension headers). */ 630732c8bd5SHerbert Xu u8 ihl; 631732c8bd5SHerbert Xu 63236cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 63336cf9acfSHerbert Xu u8 tos; 63436cf9acfSHerbert Xu 63536cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 63636cf9acfSHerbert Xu u8 ttl; 63736cf9acfSHerbert Xu 63836cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 63936cf9acfSHerbert Xu u8 protocol; 64036cf9acfSHerbert Xu 641732c8bd5SHerbert Xu /* Option length for IPv4, zero for IPv6. */ 642732c8bd5SHerbert Xu u8 optlen; 643732c8bd5SHerbert Xu 64436cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 64536cf9acfSHerbert Xu u8 flow_lbl[3]; 64636cf9acfSHerbert Xu }; 64736cf9acfSHerbert Xu 64836cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 64936cf9acfSHerbert Xu 650716062fdSHerbert Xu /* 651716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 652716062fdSHerbert Xu * related information. 653716062fdSHerbert Xu */ 654716062fdSHerbert Xu struct xfrm_spi_skb_cb { 655716062fdSHerbert Xu union { 656716062fdSHerbert Xu struct inet_skb_parm h4; 657716062fdSHerbert Xu struct inet6_skb_parm h6; 658716062fdSHerbert Xu } header; 659716062fdSHerbert Xu 660716062fdSHerbert Xu unsigned int daddroff; 6612fcb45b6SHerbert Xu unsigned int family; 662716062fdSHerbert Xu }; 663716062fdSHerbert Xu 664716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 665716062fdSHerbert Xu 666161a09e7SJoy Latten /* Audit Information */ 667fd2c3ef7SEric Dumazet struct xfrm_audit { 668161a09e7SJoy Latten u32 secid; 6692532386fSEric Paris uid_t loginuid; 6702532386fSEric Paris u32 sessionid; 671161a09e7SJoy Latten }; 672c9204d9cSJoy Latten 673c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 674afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 675ab5f5e8bSJoy Latten { 676ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 677ab5f5e8bSJoy Latten 678afeb14b4SPaul Moore if (audit_enabled == 0) 679afeb14b4SPaul Moore return NULL; 680ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 681ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 682ab5f5e8bSJoy Latten if (audit_buf == NULL) 683ab5f5e8bSJoy Latten return NULL; 684afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 685afeb14b4SPaul Moore return audit_buf; 686afeb14b4SPaul Moore } 687afeb14b4SPaul Moore 6882532386fSEric Paris static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid, 689afeb14b4SPaul Moore struct audit_buffer *audit_buf) 690afeb14b4SPaul Moore { 691afeb14b4SPaul Moore char *secctx; 692afeb14b4SPaul Moore u32 secctx_len; 693ab5f5e8bSJoy Latten 6942532386fSEric Paris audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); 69568277accSPaul Moore if (secid != 0 && 69668277accSPaul Moore security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { 697ab5f5e8bSJoy Latten audit_log_format(audit_buf, " subj=%s", secctx); 698ab5f5e8bSJoy Latten security_release_secctx(secctx, secctx_len); 699ab5f5e8bSJoy Latten } else 700ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 701ab5f5e8bSJoy Latten } 702ab5f5e8bSJoy Latten 703ab5f5e8bSJoy Latten extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 7042532386fSEric Paris u32 auid, u32 ses, u32 secid); 705ab5f5e8bSJoy Latten extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 7062532386fSEric Paris u32 auid, u32 ses, u32 secid); 707ab5f5e8bSJoy Latten extern void xfrm_audit_state_add(struct xfrm_state *x, int result, 7082532386fSEric Paris u32 auid, u32 ses, u32 secid); 709ab5f5e8bSJoy Latten extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, 7102532386fSEric Paris u32 auid, u32 ses, u32 secid); 711afeb14b4SPaul Moore extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 712afeb14b4SPaul Moore struct sk_buff *skb); 7139fdc4883SSteffen Klassert extern void xfrm_audit_state_replay(struct xfrm_state *x, 7149fdc4883SSteffen Klassert struct sk_buff *skb, __be32 net_seq); 715afeb14b4SPaul Moore extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 716afeb14b4SPaul Moore extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 717afeb14b4SPaul Moore __be32 net_spi, __be32 net_seq); 718afeb14b4SPaul Moore extern void xfrm_audit_state_icvfail(struct xfrm_state *x, 719afeb14b4SPaul Moore struct sk_buff *skb, u8 proto); 720c9204d9cSJoy Latten #else 72141fef0eeSMarcin Slusarz 72241fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 72341fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 72441fef0eeSMarcin Slusarz { 72541fef0eeSMarcin Slusarz } 72641fef0eeSMarcin Slusarz 72741fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_delete(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_state_add(struct xfrm_state *x, int result, 73341fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 73441fef0eeSMarcin Slusarz { 73541fef0eeSMarcin Slusarz } 73641fef0eeSMarcin Slusarz 73741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_delete(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_replay_overflow(struct xfrm_state *x, 74341fef0eeSMarcin Slusarz struct sk_buff *skb) 74441fef0eeSMarcin Slusarz { 74541fef0eeSMarcin Slusarz } 74641fef0eeSMarcin Slusarz 7479fdc4883SSteffen Klassert static inline void xfrm_audit_state_replay(struct xfrm_state *x, 7489fdc4883SSteffen Klassert struct sk_buff *skb, __be32 net_seq) 7499fdc4883SSteffen Klassert { 7509fdc4883SSteffen Klassert } 7519fdc4883SSteffen Klassert 75241fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, 75341fef0eeSMarcin Slusarz u16 family) 75441fef0eeSMarcin Slusarz { 75541fef0eeSMarcin Slusarz } 75641fef0eeSMarcin Slusarz 75741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 75841fef0eeSMarcin Slusarz __be32 net_spi, __be32 net_seq) 75941fef0eeSMarcin Slusarz { 76041fef0eeSMarcin Slusarz } 76141fef0eeSMarcin Slusarz 76241fef0eeSMarcin Slusarz static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, 76341fef0eeSMarcin Slusarz struct sk_buff *skb, u8 proto) 76441fef0eeSMarcin Slusarz { 76541fef0eeSMarcin Slusarz } 766c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 767161a09e7SJoy Latten 7681da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 7691da177e4SLinus Torvalds { 7701da177e4SLinus Torvalds if (likely(policy != NULL)) 7711da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 7721da177e4SLinus Torvalds } 7731da177e4SLinus Torvalds 77464c31b3fSWANG Cong extern void xfrm_policy_destroy(struct xfrm_policy *policy); 7751da177e4SLinus Torvalds 7761da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 7771da177e4SLinus Torvalds { 7781da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 77964c31b3fSWANG Cong xfrm_policy_destroy(policy); 7801da177e4SLinus Torvalds } 7811da177e4SLinus Torvalds 7824e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7834e81bb83SMasahide NAKAMURA { 7844e81bb83SMasahide NAKAMURA int i; 7854e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 7864e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 7874e81bb83SMasahide NAKAMURA } 7884e81bb83SMasahide NAKAMURA 7891da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 7901da177e4SLinus Torvalds 79121380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 79221380b81SHerbert Xu { 79321380b81SHerbert Xu atomic_dec(&x->refcnt); 79421380b81SHerbert Xu } 79521380b81SHerbert Xu 7961da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 7971da177e4SLinus Torvalds { 7981da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 7991da177e4SLinus Torvalds __xfrm_state_destroy(x); 8001da177e4SLinus Torvalds } 8011da177e4SLinus Torvalds 8021da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 8031da177e4SLinus Torvalds { 8041da177e4SLinus Torvalds atomic_inc(&x->refcnt); 8051da177e4SLinus Torvalds } 8061da177e4SLinus Torvalds 8071744a8feSDavid S. Miller static inline bool addr_match(const void *token1, const void *token2, 8081744a8feSDavid S. Miller int prefixlen) 8091da177e4SLinus Torvalds { 8101744a8feSDavid S. Miller const __be32 *a1 = token1; 8111744a8feSDavid S. Miller const __be32 *a2 = token2; 8121da177e4SLinus Torvalds int pdw; 8131da177e4SLinus Torvalds int pbi; 8141da177e4SLinus Torvalds 815a6337463Sjamal pdw = prefixlen >> 5; /* num of whole u32 in prefix */ 8161da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 8171da177e4SLinus Torvalds 8181da177e4SLinus Torvalds if (pdw) 8191da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 8201744a8feSDavid S. Miller return false; 8211da177e4SLinus Torvalds 8221da177e4SLinus Torvalds if (pbi) { 8235f19343fSAl Viro __be32 mask; 8241da177e4SLinus Torvalds 8251da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 8261da177e4SLinus Torvalds 8271da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 8281744a8feSDavid S. Miller return false; 8291da177e4SLinus Torvalds } 8301da177e4SLinus Torvalds 8311744a8feSDavid S. Miller return true; 8321da177e4SLinus Torvalds } 8331da177e4SLinus Torvalds 83426bff940SAlexey Dobriyan static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) 83526bff940SAlexey Dobriyan { 83626bff940SAlexey Dobriyan /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ 83726bff940SAlexey Dobriyan if (prefixlen == 0) 83826bff940SAlexey Dobriyan return true; 83926bff940SAlexey Dobriyan return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen))); 84026bff940SAlexey Dobriyan } 84126bff940SAlexey Dobriyan 8421da177e4SLinus Torvalds static __inline__ 8436281dcc9SDavid S. Miller __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) 8441da177e4SLinus Torvalds { 845f9d07e41SAl Viro __be16 port; 8461d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8471da177e4SLinus Torvalds case IPPROTO_TCP: 8481da177e4SLinus Torvalds case IPPROTO_UDP: 849ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8501da177e4SLinus Torvalds case IPPROTO_SCTP: 8516281dcc9SDavid S. Miller port = uli->ports.sport; 8521da177e4SLinus Torvalds break; 8531da177e4SLinus Torvalds case IPPROTO_ICMP: 8541da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8556281dcc9SDavid S. Miller port = htons(uli->icmpt.type); 8561da177e4SLinus Torvalds break; 8572ce4272aSMasahide NAKAMURA case IPPROTO_MH: 8586281dcc9SDavid S. Miller port = htons(uli->mht.type); 8592ce4272aSMasahide NAKAMURA break; 860cc9ff19dSTimo Teräs case IPPROTO_GRE: 8616281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) >> 16); 862cc9ff19dSTimo Teräs break; 8631da177e4SLinus Torvalds default: 8641da177e4SLinus Torvalds port = 0; /*XXX*/ 8651da177e4SLinus Torvalds } 8661da177e4SLinus Torvalds return port; 8671da177e4SLinus Torvalds } 8681da177e4SLinus Torvalds 8691da177e4SLinus Torvalds static __inline__ 8706281dcc9SDavid S. Miller __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) 8711da177e4SLinus Torvalds { 872f9d07e41SAl Viro __be16 port; 8731d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8741da177e4SLinus Torvalds case IPPROTO_TCP: 8751da177e4SLinus Torvalds case IPPROTO_UDP: 876ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8771da177e4SLinus Torvalds case IPPROTO_SCTP: 8786281dcc9SDavid S. Miller port = uli->ports.dport; 8791da177e4SLinus Torvalds break; 8801da177e4SLinus Torvalds case IPPROTO_ICMP: 8811da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8826281dcc9SDavid S. Miller port = htons(uli->icmpt.code); 8831da177e4SLinus Torvalds break; 884cc9ff19dSTimo Teräs case IPPROTO_GRE: 8856281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) & 0xffff); 886cc9ff19dSTimo Teräs break; 8871da177e4SLinus Torvalds default: 8881da177e4SLinus Torvalds port = 0; /*XXX*/ 8891da177e4SLinus Torvalds } 8901da177e4SLinus Torvalds return port; 8911da177e4SLinus Torvalds } 8921da177e4SLinus Torvalds 893bc9b35adSDavid S. Miller extern bool xfrm_selector_match(const struct xfrm_selector *sel, 894e1ad2ab2SDavid S. Miller const struct flowi *fl, 89577681021SAndrew Morton unsigned short family); 8961da177e4SLinus Torvalds 897df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 898df71837dSTrent Jaeger /* If neither has a context --> match 899df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 900df71837dSTrent Jaeger */ 901bc9b35adSDavid S. Miller static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 902df71837dSTrent Jaeger { 903df71837dSTrent Jaeger return ((!s1 && !s2) || 904df71837dSTrent Jaeger (s1 && s2 && 905df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 906df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 907df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 908df71837dSTrent Jaeger } 909df71837dSTrent Jaeger #else 910bc9b35adSDavid S. Miller static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 911df71837dSTrent Jaeger { 912bc9b35adSDavid S. Miller return true; 913df71837dSTrent Jaeger } 914df71837dSTrent Jaeger #endif 915df71837dSTrent Jaeger 9161da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 9171da177e4SLinus Torvalds * 9181da177e4SLinus Torvalds * dst->child points to the next element of bundle. 9191da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 9201da177e4SLinus Torvalds * 9211da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 9221da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 9231da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 9241da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 9251da177e4SLinus Torvalds * policy rule. 9261da177e4SLinus Torvalds */ 927fd2c3ef7SEric Dumazet struct xfrm_dst { 9281da177e4SLinus Torvalds union { 9291da177e4SLinus Torvalds struct dst_entry dst; 9301da177e4SLinus Torvalds struct rtable rt; 9311da177e4SLinus Torvalds struct rt6_info rt6; 9321da177e4SLinus Torvalds } u; 9331da177e4SLinus Torvalds struct dst_entry *route; 93480c802f3STimo Teräs struct flow_cache_object flo; 93580c802f3STimo Teräs struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; 93680c802f3STimo Teräs int num_pols, num_xfrms; 937157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 938157bfc25SMasahide NAKAMURA struct flowi *origin; 939157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 940157bfc25SMasahide NAKAMURA #endif 94180c802f3STimo Teräs u32 xfrm_genid; 94280c802f3STimo Teräs u32 policy_genid; 9431da177e4SLinus Torvalds u32 route_mtu_cached; 9441da177e4SLinus Torvalds u32 child_mtu_cached; 94592d63decSHideaki YOSHIFUJI u32 route_cookie; 94692d63decSHideaki YOSHIFUJI u32 path_cookie; 9471da177e4SLinus Torvalds }; 9481da177e4SLinus Torvalds 949def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 950aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 951aabc9761SHerbert Xu { 95280c802f3STimo Teräs xfrm_pols_put(xdst->pols, xdst->num_pols); 953aabc9761SHerbert Xu dst_release(xdst->route); 954aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 955aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 956157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 957157bfc25SMasahide NAKAMURA kfree(xdst->origin); 958157bfc25SMasahide NAKAMURA xdst->origin = NULL; 959157bfc25SMasahide NAKAMURA kfree(xdst->partner); 960157bfc25SMasahide NAKAMURA xdst->partner = NULL; 961157bfc25SMasahide NAKAMURA #endif 962aabc9761SHerbert Xu } 963def8b4faSAlexey Dobriyan #endif 964aabc9761SHerbert Xu 965aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 966aabc9761SHerbert Xu 967fd2c3ef7SEric Dumazet struct sec_path { 9681da177e4SLinus Torvalds atomic_t refcnt; 9691da177e4SLinus Torvalds int len; 970dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 9711da177e4SLinus Torvalds }; 9721da177e4SLinus Torvalds 973990078afSMichael Smith static inline int secpath_exists(struct sk_buff *skb) 974990078afSMichael Smith { 975990078afSMichael Smith #ifdef CONFIG_XFRM 976990078afSMichael Smith return skb->sp != NULL; 977990078afSMichael Smith #else 978990078afSMichael Smith return 0; 979990078afSMichael Smith #endif 980990078afSMichael Smith } 981990078afSMichael Smith 9821da177e4SLinus Torvalds static inline struct sec_path * 9831da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 9841da177e4SLinus Torvalds { 9851da177e4SLinus Torvalds if (sp) 9861da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 9871da177e4SLinus Torvalds return sp; 9881da177e4SLinus Torvalds } 9891da177e4SLinus Torvalds 9901da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 9911da177e4SLinus Torvalds 9921da177e4SLinus Torvalds static inline void 9931da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 9941da177e4SLinus Torvalds { 9951da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 9961da177e4SLinus Torvalds __secpath_destroy(sp); 9971da177e4SLinus Torvalds } 9981da177e4SLinus Torvalds 9991da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 10001da177e4SLinus Torvalds 10011da177e4SLinus Torvalds static inline void 10021da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 10031da177e4SLinus Torvalds { 10041da177e4SLinus Torvalds #ifdef CONFIG_XFRM 10051da177e4SLinus Torvalds secpath_put(skb->sp); 10061da177e4SLinus Torvalds skb->sp = NULL; 10071da177e4SLinus Torvalds #endif 10081da177e4SLinus Torvalds } 10091da177e4SLinus Torvalds 10101da177e4SLinus Torvalds static inline int 10116cc32961SDavid S. Miller xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) 1012a1e59abfSPatrick McHardy { 1013a1e59abfSPatrick McHardy switch (family) { 1014a1e59abfSPatrick McHardy case AF_INET: 1015a1e59abfSPatrick McHardy return addr->a4 == 0; 1016a1e59abfSPatrick McHardy case AF_INET6: 1017a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 1018a1e59abfSPatrick McHardy } 1019a1e59abfSPatrick McHardy return 0; 1020a1e59abfSPatrick McHardy } 1021a1e59abfSPatrick McHardy 1022a1e59abfSPatrick McHardy static inline int 102321eddb5cSDavid S. Miller __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 10241da177e4SLinus Torvalds { 10251da177e4SLinus Torvalds return (tmpl->saddr.a4 && 10261da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 10271da177e4SLinus Torvalds } 10281da177e4SLinus Torvalds 10291da177e4SLinus Torvalds static inline int 103021eddb5cSDavid S. Miller __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 10311da177e4SLinus Torvalds { 10321da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 10331da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 10341da177e4SLinus Torvalds } 10351da177e4SLinus Torvalds 10361da177e4SLinus Torvalds static inline int 103721eddb5cSDavid S. Miller xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) 10381da177e4SLinus Torvalds { 10391da177e4SLinus Torvalds switch (family) { 10401da177e4SLinus Torvalds case AF_INET: 10411da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 10421da177e4SLinus Torvalds case AF_INET6: 10431da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 10441da177e4SLinus Torvalds } 10451da177e4SLinus Torvalds return !0; 10461da177e4SLinus Torvalds } 10471da177e4SLinus Torvalds 10481da177e4SLinus Torvalds #ifdef CONFIG_XFRM 10491da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 10501da177e4SLinus Torvalds 1051d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 1052d5422efeSHerbert Xu struct sk_buff *skb, 1053d5422efeSHerbert Xu unsigned int family, int reverse) 10541da177e4SLinus Torvalds { 1055f6e1e25dSAlexey Dobriyan struct net *net = dev_net(skb->dev); 1056d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 1057d5422efeSHerbert Xu 10581da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 1059d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 10601da177e4SLinus Torvalds 1061f6e1e25dSAlexey Dobriyan return (!net->xfrm.policy_count[dir] && !skb->sp) || 1062adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOPOLICY) || 1063d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 1064d5422efeSHerbert Xu } 1065d5422efeSHerbert Xu 1066d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 1067d5422efeSHerbert Xu { 1068d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 10691da177e4SLinus Torvalds } 10701da177e4SLinus Torvalds 10711da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10721da177e4SLinus Torvalds { 10731da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 10741da177e4SLinus Torvalds } 10751da177e4SLinus Torvalds 10761da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10771da177e4SLinus Torvalds { 10781da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 10791da177e4SLinus Torvalds } 10801da177e4SLinus Torvalds 1081d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1082d5422efeSHerbert Xu struct sk_buff *skb) 1083d5422efeSHerbert Xu { 1084d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 1085d5422efeSHerbert Xu } 1086d5422efeSHerbert Xu 1087d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1088d5422efeSHerbert Xu struct sk_buff *skb) 1089d5422efeSHerbert Xu { 1090d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 1091d5422efeSHerbert Xu } 1092d5422efeSHerbert Xu 1093d5422efeSHerbert Xu extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1094d5422efeSHerbert Xu unsigned int family, int reverse); 1095d5422efeSHerbert Xu 1096d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1097d5422efeSHerbert Xu unsigned int family) 1098d5422efeSHerbert Xu { 1099d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 1100d5422efeSHerbert Xu } 1101d5422efeSHerbert Xu 1102d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1103d5422efeSHerbert Xu struct flowi *fl, 1104d5422efeSHerbert Xu unsigned int family) 1105d5422efeSHerbert Xu { 1106d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 1107d5422efeSHerbert Xu } 1108d5422efeSHerbert Xu 11091da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 11101da177e4SLinus Torvalds 11111da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 11121da177e4SLinus Torvalds { 111399a66657SAlexey Dobriyan struct net *net = dev_net(skb->dev); 111499a66657SAlexey Dobriyan 111599a66657SAlexey Dobriyan return !net->xfrm.policy_count[XFRM_POLICY_OUT] || 1116adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOXFRM) || 11171da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 11181da177e4SLinus Torvalds } 11191da177e4SLinus Torvalds 11201da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 11211da177e4SLinus Torvalds { 11221da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 11231da177e4SLinus Torvalds } 11241da177e4SLinus Torvalds 11251da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 11261da177e4SLinus Torvalds { 11271da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 11281da177e4SLinus Torvalds } 11291da177e4SLinus Torvalds 11301da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 11311da177e4SLinus Torvalds 11321da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 11331da177e4SLinus Torvalds { 11341da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 11351da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 11361da177e4SLinus Torvalds return 0; 11371da177e4SLinus Torvalds } 11381da177e4SLinus Torvalds 11394666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 11401da177e4SLinus Torvalds 11411da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 11421da177e4SLinus Torvalds { 11431da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 11441da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 11451da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 11461da177e4SLinus Torvalds } 11471da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 11481da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 11491da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 11501da177e4SLinus Torvalds } 11511da177e4SLinus Torvalds } 11521da177e4SLinus Torvalds 11531da177e4SLinus Torvalds #else 11541da177e4SLinus Torvalds 11551da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 11561da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 11571da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 11581da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 11591da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11601da177e4SLinus Torvalds { 11611da177e4SLinus Torvalds return 1; 11621da177e4SLinus Torvalds } 11631da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11641da177e4SLinus Torvalds { 11651da177e4SLinus Torvalds return 1; 11661da177e4SLinus Torvalds } 11671da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 11681da177e4SLinus Torvalds { 11691da177e4SLinus Torvalds return 1; 11701da177e4SLinus Torvalds } 1171d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1172d5422efeSHerbert Xu struct flowi *fl, 1173d5422efeSHerbert Xu unsigned int family) 1174d5422efeSHerbert Xu { 1175d5422efeSHerbert Xu return -ENOSYS; 1176d5422efeSHerbert Xu } 1177d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1178d5422efeSHerbert Xu struct sk_buff *skb) 1179d5422efeSHerbert Xu { 1180d5422efeSHerbert Xu return 1; 1181d5422efeSHerbert Xu } 1182d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1183d5422efeSHerbert Xu struct sk_buff *skb) 1184d5422efeSHerbert Xu { 1185d5422efeSHerbert Xu return 1; 1186d5422efeSHerbert Xu } 11871da177e4SLinus Torvalds #endif 11881da177e4SLinus Torvalds 11891da177e4SLinus Torvalds static __inline__ 1190e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) 11911da177e4SLinus Torvalds { 11921da177e4SLinus Torvalds switch (family){ 11931da177e4SLinus Torvalds case AF_INET: 11947e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.daddr; 11951da177e4SLinus Torvalds case AF_INET6: 11967e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.daddr; 11971da177e4SLinus Torvalds } 11981da177e4SLinus Torvalds return NULL; 11991da177e4SLinus Torvalds } 12001da177e4SLinus Torvalds 12011da177e4SLinus Torvalds static __inline__ 1202e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) 12031da177e4SLinus Torvalds { 12041da177e4SLinus Torvalds switch (family){ 12051da177e4SLinus Torvalds case AF_INET: 12067e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.saddr; 12071da177e4SLinus Torvalds case AF_INET6: 12087e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.saddr; 12091da177e4SLinus Torvalds } 12101da177e4SLinus Torvalds return NULL; 12111da177e4SLinus Torvalds } 12121da177e4SLinus Torvalds 12139bb182a7SYOSHIFUJI Hideaki static __inline__ 1214e8a4e377SDavid S. Miller void xfrm_flowi_addr_get(const struct flowi *fl, 12159bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 12169bb182a7SYOSHIFUJI Hideaki unsigned short family) 12179bb182a7SYOSHIFUJI Hideaki { 12189bb182a7SYOSHIFUJI Hideaki switch(family) { 12199bb182a7SYOSHIFUJI Hideaki case AF_INET: 12207e1dc7b6SDavid S. Miller memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); 12217e1dc7b6SDavid S. Miller memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); 12229bb182a7SYOSHIFUJI Hideaki break; 12239bb182a7SYOSHIFUJI Hideaki case AF_INET6: 12244e3fd7a0SAlexey Dobriyan *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr; 12254e3fd7a0SAlexey Dobriyan *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr; 12269bb182a7SYOSHIFUJI Hideaki break; 12279bb182a7SYOSHIFUJI Hideaki } 12289bb182a7SYOSHIFUJI Hideaki } 12299bb182a7SYOSHIFUJI Hideaki 12301da177e4SLinus Torvalds static __inline__ int 1231f8848067SDavid S. Miller __xfrm4_state_addr_check(const struct xfrm_state *x, 1232f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 12331da177e4SLinus Torvalds { 12341da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 12351da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 12361da177e4SLinus Torvalds return 1; 12371da177e4SLinus Torvalds return 0; 12381da177e4SLinus Torvalds } 12391da177e4SLinus Torvalds 12401da177e4SLinus Torvalds static __inline__ int 1241f8848067SDavid S. Miller __xfrm6_state_addr_check(const struct xfrm_state *x, 1242f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 12431da177e4SLinus Torvalds { 12441da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 12451da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 12461da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 12471da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 12481da177e4SLinus Torvalds return 1; 12491da177e4SLinus Torvalds return 0; 12501da177e4SLinus Torvalds } 12511da177e4SLinus Torvalds 12521da177e4SLinus Torvalds static __inline__ int 1253f8848067SDavid S. Miller xfrm_state_addr_check(const struct xfrm_state *x, 1254f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr, 12551da177e4SLinus Torvalds unsigned short family) 12561da177e4SLinus Torvalds { 12571da177e4SLinus Torvalds switch (family) { 12581da177e4SLinus Torvalds case AF_INET: 12591da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 12601da177e4SLinus Torvalds case AF_INET6: 12611da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 12621da177e4SLinus Torvalds } 12631da177e4SLinus Torvalds return 0; 12641da177e4SLinus Torvalds } 12651da177e4SLinus Torvalds 1266e53820deSMasahide NAKAMURA static __inline__ int 1267f8848067SDavid S. Miller xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, 1268e53820deSMasahide NAKAMURA unsigned short family) 1269e53820deSMasahide NAKAMURA { 1270e53820deSMasahide NAKAMURA switch (family) { 1271e53820deSMasahide NAKAMURA case AF_INET: 1272e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 12737e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.daddr, 12747e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.saddr); 1275e53820deSMasahide NAKAMURA case AF_INET6: 1276e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 12777e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.daddr, 12787e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.saddr); 1279e53820deSMasahide NAKAMURA } 1280e53820deSMasahide NAKAMURA return 0; 1281e53820deSMasahide NAKAMURA } 1282e53820deSMasahide NAKAMURA 1283f8848067SDavid S. Miller static inline int xfrm_state_kern(const struct xfrm_state *x) 12841da177e4SLinus Torvalds { 12851da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 12861da177e4SLinus Torvalds } 12871da177e4SLinus Torvalds 12885794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 12895794708fSMasahide NAKAMURA { 1290dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1291dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1292dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1293dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 12945794708fSMasahide NAKAMURA } 12955794708fSMasahide NAKAMURA 12961da177e4SLinus Torvalds /* 12971da177e4SLinus Torvalds * xfrm algorithm information 12981da177e4SLinus Torvalds */ 12991a6509d9SHerbert Xu struct xfrm_algo_aead_info { 13001a6509d9SHerbert Xu u16 icv_truncbits; 13011a6509d9SHerbert Xu }; 13021a6509d9SHerbert Xu 13031da177e4SLinus Torvalds struct xfrm_algo_auth_info { 13041da177e4SLinus Torvalds u16 icv_truncbits; 13051da177e4SLinus Torvalds u16 icv_fullbits; 13061da177e4SLinus Torvalds }; 13071da177e4SLinus Torvalds 13081da177e4SLinus Torvalds struct xfrm_algo_encr_info { 13091da177e4SLinus Torvalds u16 blockbits; 13101da177e4SLinus Torvalds u16 defkeybits; 13111da177e4SLinus Torvalds }; 13121da177e4SLinus Torvalds 13131da177e4SLinus Torvalds struct xfrm_algo_comp_info { 13141da177e4SLinus Torvalds u16 threshold; 13151da177e4SLinus Torvalds }; 13161da177e4SLinus Torvalds 13171da177e4SLinus Torvalds struct xfrm_algo_desc { 13181da177e4SLinus Torvalds char *name; 131904ff1260SHerbert Xu char *compat; 13201da177e4SLinus Torvalds u8 available:1; 13211da177e4SLinus Torvalds union { 13221a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 13231da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 13241da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 13251da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 13261da177e4SLinus Torvalds } uinfo; 13271da177e4SLinus Torvalds struct sadb_alg desc; 13281da177e4SLinus Torvalds }; 13291da177e4SLinus Torvalds 13301da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 13311da177e4SLinus Torvalds struct xfrm_tunnel { 13321da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1333a6337463Sjamal int (*err_handler)(struct sk_buff *skb, u32 info); 1334d2acc347SHerbert Xu 1335b33eab08SEric Dumazet struct xfrm_tunnel __rcu *next; 1336d2acc347SHerbert Xu int priority; 13371da177e4SLinus Torvalds }; 13381da177e4SLinus Torvalds 13391da177e4SLinus Torvalds struct xfrm6_tunnel { 1340d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1341d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 1342d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info); 13436f0bcf15SEric Dumazet struct xfrm6_tunnel __rcu *next; 1344d2acc347SHerbert Xu int priority; 13451da177e4SLinus Torvalds }; 13461da177e4SLinus Torvalds 13471da177e4SLinus Torvalds extern void xfrm_init(void); 1348a33bc5c1SNeil Horman extern void xfrm4_init(int rt_hash_size); 1349d62ddc21SAlexey Dobriyan extern int xfrm_state_init(struct net *net); 1350d62ddc21SAlexey Dobriyan extern void xfrm_state_fini(struct net *net); 13511da177e4SLinus Torvalds extern void xfrm4_state_init(void); 1352c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1353c35b7e72SDaniel Lezcano extern int xfrm6_init(void); 1354c35b7e72SDaniel Lezcano extern void xfrm6_fini(void); 13550013cabaSDaniel Lezcano extern int xfrm6_state_init(void); 13561da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 1357c35b7e72SDaniel Lezcano #else 1358c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1359c35b7e72SDaniel Lezcano { 1360c35b7e72SDaniel Lezcano return 0; 1361c35b7e72SDaniel Lezcano } 1362c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1363c35b7e72SDaniel Lezcano { 1364c35b7e72SDaniel Lezcano ; 1365c35b7e72SDaniel Lezcano } 1366c35b7e72SDaniel Lezcano #endif 13671da177e4SLinus Torvalds 1368558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1369c68cd1a0SAlexey Dobriyan extern int xfrm_proc_init(struct net *net); 1370c68cd1a0SAlexey Dobriyan extern void xfrm_proc_fini(struct net *net); 1371558f82efSMasahide NAKAMURA #endif 1372558f82efSMasahide NAKAMURA 1373b27aeadbSAlexey Dobriyan extern int xfrm_sysctl_init(struct net *net); 1374b27aeadbSAlexey Dobriyan #ifdef CONFIG_SYSCTL 1375b27aeadbSAlexey Dobriyan extern void xfrm_sysctl_fini(struct net *net); 1376b27aeadbSAlexey Dobriyan #else 1377b27aeadbSAlexey Dobriyan static inline void xfrm_sysctl_fini(struct net *net) 1378b27aeadbSAlexey Dobriyan { 1379b27aeadbSAlexey Dobriyan } 1380b27aeadbSAlexey Dobriyan #endif 1381b27aeadbSAlexey Dobriyan 13825c182458SHerbert Xu extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); 1383284fa7daSAlexey Dobriyan extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 13844c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1385abb81c4fSHerbert Xu extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); 1386673c09beSAlexey Dobriyan extern struct xfrm_state *xfrm_state_alloc(struct net *net); 138733765d06SDavid S. Miller extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, 138833765d06SDavid S. Miller const xfrm_address_t *saddr, 1389b520e9f6SDavid S. Miller const struct flowi *fl, 1390b520e9f6SDavid S. Miller struct xfrm_tmpl *tmpl, 13911da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 13921da177e4SLinus Torvalds unsigned short family); 1393bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, 13945447c5e4SAlexey Dobriyan xfrm_address_t *daddr, 1395628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1396628529b6SJamal Hadi Salim unsigned short family, 1397628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 13981da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 13991da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 14001da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 14011da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1402bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, 1403a70486f0SDavid S. Miller const xfrm_address_t *daddr, __be32 spi, 1404bd55775cSJamal Hadi Salim u8 proto, unsigned short family); 1405bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, 1406a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1407a70486f0SDavid S. Miller const xfrm_address_t *saddr, 1408bd55775cSJamal Hadi Salim u8 proto, 1409bd55775cSJamal Hadi Salim unsigned short family); 141041a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 141141a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 141241a49cc3SMasahide NAKAMURA int n, unsigned short family); 141341a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 141441a49cc3SMasahide NAKAMURA int n, unsigned short family); 141541a49cc3SMasahide NAKAMURA #else 141641a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 141741a49cc3SMasahide NAKAMURA int n, unsigned short family) 141841a49cc3SMasahide NAKAMURA { 141941a49cc3SMasahide NAKAMURA return -ENOSYS; 142041a49cc3SMasahide NAKAMURA } 142141a49cc3SMasahide NAKAMURA 142241a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 142341a49cc3SMasahide NAKAMURA int n, unsigned short family) 142441a49cc3SMasahide NAKAMURA { 142541a49cc3SMasahide NAKAMURA return -ENOSYS; 142641a49cc3SMasahide NAKAMURA } 142741a49cc3SMasahide NAKAMURA #endif 1428af11e316SJamal Hadi Salim 1429af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1430af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1431af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1432af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1433af11e316SJamal Hadi Salim }; 1434af11e316SJamal Hadi Salim 14355a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 14365a6d3416SJamal Hadi Salim u32 incnt; 14375a6d3416SJamal Hadi Salim u32 outcnt; 14385a6d3416SJamal Hadi Salim u32 fwdcnt; 14395a6d3416SJamal Hadi Salim u32 inscnt; 14405a6d3416SJamal Hadi Salim u32 outscnt; 14415a6d3416SJamal Hadi Salim u32 fwdscnt; 14425a6d3416SJamal Hadi Salim u32 spdhcnt; 14435a6d3416SJamal Hadi Salim u32 spdhmcnt; 14445a6d3416SJamal Hadi Salim }; 14455a6d3416SJamal Hadi Salim 1446bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, 1447bd55775cSJamal Hadi Salim u32 seq); 144826b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 14490e602451SAlexey Dobriyan extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); 1450e071041bSAlexey Dobriyan extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); 1451e071041bSAlexey Dobriyan extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); 14522cd08467SSteffen Klassert extern u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); 14539fdc4883SSteffen Klassert extern int xfrm_init_replay(struct xfrm_state *x); 14541da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 1455a454f0ccSWei Yongjun extern int __xfrm_init_state(struct xfrm_state *x, bool init_replay); 145672cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1457227620e2SHerbert Xu extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1458716062fdSHerbert Xu extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, 1459716062fdSHerbert Xu int encap_type); 14601bf06cd2SHerbert Xu extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1461c6581a45SHerbert Xu extern int xfrm_output_resume(struct sk_buff *skb, int err); 1462406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 1463df9dcb45SKazunori MIYAZAWA extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 146436cf9acfSHerbert Xu extern int xfrm4_extract_header(struct sk_buff *skb); 1465227620e2SHerbert Xu extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1466c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1467c4541b41SHerbert Xu int encap_type); 1468716062fdSHerbert Xu extern int xfrm4_transport_finish(struct sk_buff *skb, int async); 14691da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1470c4541b41SHerbert Xu 1471c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1472c4541b41SHerbert Xu { 1473c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1474c4541b41SHerbert Xu } 1475c4541b41SHerbert Xu 147636cf9acfSHerbert Xu extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 147736cf9acfSHerbert Xu extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14781da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 147943a4dea4SSteffen Klassert extern int xfrm4_output_finish(struct sk_buff *skb); 1480c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1481c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 1482eb8637cdSSaurabh extern int xfrm4_mode_tunnel_input_register(struct xfrm_tunnel *handler); 1483eb8637cdSSaurabh extern int xfrm4_mode_tunnel_input_deregister(struct xfrm_tunnel *handler); 148436cf9acfSHerbert Xu extern int xfrm6_extract_header(struct sk_buff *skb); 1485227620e2SHerbert Xu extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 148633b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1487716062fdSHerbert Xu extern int xfrm6_transport_finish(struct sk_buff *skb, int async); 1488e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1489fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1490fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 149173d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 149273d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 1493a1664773SAlexey Dobriyan extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); 1494b71d1d42SEric Dumazet extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); 149536cf9acfSHerbert Xu extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 149636cf9acfSHerbert Xu extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14971da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 149843a4dea4SSteffen Klassert extern int xfrm6_output_finish(struct sk_buff *skb); 1499aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1500aee5adb4SMasahide NAKAMURA u8 **prevhdr); 15011da177e4SLinus Torvalds 15021da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1503067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 15041da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 15051da177e4SLinus Torvalds #else 15061da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 15071da177e4SLinus Torvalds { 15081da177e4SLinus Torvalds return -ENOPROTOOPT; 15091da177e4SLinus Torvalds } 15101da177e4SLinus Torvalds 1511067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 15121da177e4SLinus Torvalds { 15131da177e4SLinus Torvalds /* should not happen */ 15141da177e4SLinus Torvalds kfree_skb(skb); 15151da177e4SLinus Torvalds return 0; 15161da177e4SLinus Torvalds } 15171da177e4SLinus Torvalds #endif 15181da177e4SLinus Torvalds 15190331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 15204c563f76STimo Teras 152112a169e7SHerbert Xu extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 1522cdcbca7cSAlexey Dobriyan extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, 15234c563f76STimo Teras int (*func)(struct xfrm_policy *, int, int, void*), void *); 152412a169e7SHerbert Xu extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); 15251da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 15268ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, 15278ca2e93bSJamal Hadi Salim u8 type, int dir, 15284e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1529ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1530ef41aaa0SEric Paris int *err); 15318ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err); 153233ffbbd5SAlexey Dobriyan int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); 15331da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1534658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 1535bd55775cSJamal Hadi Salim struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark, 1536bd55775cSJamal Hadi Salim u8 mode, u32 reqid, u8 proto, 1537a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1538a70486f0SDavid S. Miller const xfrm_address_t *saddr, int create, 1539bd55775cSJamal Hadi Salim unsigned short family); 15401da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 15411da177e4SLinus Torvalds 154280c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1543183cad12SDavid S. Miller extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 1544183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_bundles, 1545183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 154680c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 154780c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 154880c9abaaSShinta Sugimoto struct xfrm_migrate *m); 1549b4b7c0b3SDavid S. Miller extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 155013c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 155113c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 155280c9abaaSShinta Sugimoto #endif 155380c9abaaSShinta Sugimoto 15545d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 15556c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 1556db983c11SAlexey Dobriyan extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 15571da177e4SLinus Torvalds 15581da177e4SLinus Torvalds extern void xfrm_input_init(void); 15596067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 15601da177e4SLinus Torvalds 15611da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 15621da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 15631da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 15641da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 15651da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 15661da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 15671da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 15681da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 15696f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); 15706f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); 15716f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); 15726f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, 15731a6509d9SHerbert Xu int probe); 15741da177e4SLinus Torvalds 1575ff6acd16SDavid S. Miller static inline int xfrm_addr_cmp(const xfrm_address_t *a, 1576ff6acd16SDavid S. Miller const xfrm_address_t *b, 15771da177e4SLinus Torvalds int family) 15781da177e4SLinus Torvalds { 15791da177e4SLinus Torvalds switch (family) { 15801da177e4SLinus Torvalds default: 15811da177e4SLinus Torvalds case AF_INET: 1582a6337463Sjamal return (__force u32)a->a4 - (__force u32)b->a4; 15831da177e4SLinus Torvalds case AF_INET6: 1584b71d1d42SEric Dumazet return ipv6_addr_cmp((const struct in6_addr *)a, 1585b71d1d42SEric Dumazet (const struct in6_addr *)b); 15861da177e4SLinus Torvalds } 15871da177e4SLinus Torvalds } 15881da177e4SLinus Torvalds 158977d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 159077d8d7a6SHerbert Xu { 159177d8d7a6SHerbert Xu return index & 7; 159277d8d7a6SHerbert Xu } 159377d8d7a6SHerbert Xu 1594a6483b79SAlexey Dobriyan #ifdef CONFIG_XFRM 1595a6483b79SAlexey Dobriyan static inline int xfrm_aevent_is_on(struct net *net) 1596f8cd5488SJamal Hadi Salim { 1597be33690dSPatrick McHardy struct sock *nlsk; 1598be33690dSPatrick McHardy int ret = 0; 1599be33690dSPatrick McHardy 1600be33690dSPatrick McHardy rcu_read_lock(); 1601a6483b79SAlexey Dobriyan nlsk = rcu_dereference(net->xfrm.nlsk); 1602be33690dSPatrick McHardy if (nlsk) 1603be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1604be33690dSPatrick McHardy rcu_read_unlock(); 1605be33690dSPatrick McHardy return ret; 1606f8cd5488SJamal Hadi Salim } 1607a6483b79SAlexey Dobriyan #endif 1608f8cd5488SJamal Hadi Salim 160985158621SDavid S. Miller static inline int xfrm_alg_len(const struct xfrm_algo *alg) 16100f99be0dSEric Dumazet { 16110f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 16120f99be0dSEric Dumazet } 16130f99be0dSEric Dumazet 161485158621SDavid S. Miller static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) 16154447bb33SMartin Willi { 16164447bb33SMartin Willi return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 16174447bb33SMartin Willi } 16184447bb33SMartin Willi 16199736acf3SSteffen Klassert static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) 16209736acf3SSteffen Klassert { 16219736acf3SSteffen Klassert return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); 16229736acf3SSteffen Klassert } 16239736acf3SSteffen Klassert 162480c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1625af2f464eSSteffen Klassert static inline int xfrm_replay_clone(struct xfrm_state *x, 1626af2f464eSSteffen Klassert struct xfrm_state *orig) 1627af2f464eSSteffen Klassert { 1628af2f464eSSteffen Klassert x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), 1629af2f464eSSteffen Klassert GFP_KERNEL); 1630af2f464eSSteffen Klassert if (!x->replay_esn) 1631af2f464eSSteffen Klassert return -ENOMEM; 1632af2f464eSSteffen Klassert 1633af2f464eSSteffen Klassert x->replay_esn->bmp_len = orig->replay_esn->bmp_len; 1634af2f464eSSteffen Klassert x->replay_esn->replay_window = orig->replay_esn->replay_window; 1635af2f464eSSteffen Klassert 1636af2f464eSSteffen Klassert x->preplay_esn = kmemdup(x->replay_esn, 1637af2f464eSSteffen Klassert xfrm_replay_state_esn_len(x->replay_esn), 1638af2f464eSSteffen Klassert GFP_KERNEL); 1639af2f464eSSteffen Klassert if (!x->preplay_esn) { 1640af2f464eSSteffen Klassert kfree(x->replay_esn); 1641af2f464eSSteffen Klassert return -ENOMEM; 1642af2f464eSSteffen Klassert } 1643af2f464eSSteffen Klassert 1644af2f464eSSteffen Klassert return 0; 1645af2f464eSSteffen Klassert } 1646af2f464eSSteffen Klassert 164780c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 164880c9abaaSShinta Sugimoto { 16490f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 165080c9abaaSShinta Sugimoto } 165180c9abaaSShinta Sugimoto 16524447bb33SMartin Willi static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) 16534447bb33SMartin Willi { 16544447bb33SMartin Willi return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); 16554447bb33SMartin Willi } 16564447bb33SMartin Willi 165780c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 165880c9abaaSShinta Sugimoto { 165980c9abaaSShinta Sugimoto int i; 166080c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 166180c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 166280c9abaaSShinta Sugimoto } 166380c9abaaSShinta Sugimoto 166480c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 166580c9abaaSShinta Sugimoto { 166680c9abaaSShinta Sugimoto int i; 166780c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 166880c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 166980c9abaaSShinta Sugimoto } 167080c9abaaSShinta Sugimoto #endif 1671f8cd5488SJamal Hadi Salim 1672def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 167300501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 167400501121SHerbert Xu { 167500501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 167600501121SHerbert Xu } 1677def8b4faSAlexey Dobriyan #endif 167800501121SHerbert Xu 1679bf825f81SJamal Hadi Salim static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) 1680bf825f81SJamal Hadi Salim { 1681bf825f81SJamal Hadi Salim if (attrs[XFRMA_MARK]) 16824efd7e83SAndreas Steffen memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); 1683bf825f81SJamal Hadi Salim else 1684bf825f81SJamal Hadi Salim m->v = m->m = 0; 1685bf825f81SJamal Hadi Salim 1686bf825f81SJamal Hadi Salim return m->v & m->m; 1687bf825f81SJamal Hadi Salim } 1688bf825f81SJamal Hadi Salim 1689e3dfa389SDavid S. Miller static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) 1690bf825f81SJamal Hadi Salim { 16911d1e34ddSDavid S. Miller int ret = 0; 1692bf825f81SJamal Hadi Salim 16931d1e34ddSDavid S. Miller if (m->m | m->v) 16941d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); 16951d1e34ddSDavid S. Miller return ret; 1696bf825f81SJamal Hadi Salim } 1697bf825f81SJamal Hadi Salim 16981da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1699