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; 1891da177e4SLinus Torvalds 190f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 191f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 192f8cd5488SJamal Hadi Salim 1932717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 1942717096aSJamal Hadi Salim * moment 1952717096aSJamal Hadi Salim */ 1962717096aSJamal Hadi Salim u32 xflags; 1972717096aSJamal Hadi Salim 198f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 199f8cd5488SJamal Hadi Salim u32 replay_maxage; 200f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 201f8cd5488SJamal Hadi Salim 202f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 203f8cd5488SJamal Hadi Salim struct timer_list rtimer; 204f8cd5488SJamal Hadi Salim 2051da177e4SLinus Torvalds /* Statistics */ 2061da177e4SLinus Torvalds struct xfrm_stats stats; 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 2099e0d57fdSYury Polyanskiy struct tasklet_hrtimer mtimer; 2101da177e4SLinus Torvalds 2119afaca05SMasahide NAKAMURA /* Last used time */ 212d26f3984SHerbert Xu unsigned long lastused; 2139afaca05SMasahide NAKAMURA 2141da177e4SLinus Torvalds /* Reference to data common to all the instances of this 2151da177e4SLinus Torvalds * transformer. */ 216533cb5b0SEric Dumazet const struct xfrm_type *type; 21713996378SHerbert Xu struct xfrm_mode *inner_mode; 218df9dcb45SKazunori MIYAZAWA struct xfrm_mode *inner_mode_iaf; 21913996378SHerbert Xu struct xfrm_mode *outer_mode; 2201da177e4SLinus Torvalds 221df71837dSTrent Jaeger /* Security context */ 222df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 223df71837dSTrent Jaeger 2241da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 2251da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 2261da177e4SLinus Torvalds void *data; 2271da177e4SLinus Torvalds }; 2281da177e4SLinus Torvalds 229673c09beSAlexey Dobriyan static inline struct net *xs_net(struct xfrm_state *x) 230673c09beSAlexey Dobriyan { 231673c09beSAlexey Dobriyan return read_pnet(&x->xs_net); 232673c09beSAlexey Dobriyan } 233673c09beSAlexey Dobriyan 2342717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2352717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 2362717096aSJamal Hadi Salim 2371da177e4SLinus Torvalds enum { 2381da177e4SLinus Torvalds XFRM_STATE_VOID, 2391da177e4SLinus Torvalds XFRM_STATE_ACQ, 2401da177e4SLinus Torvalds XFRM_STATE_VALID, 2411da177e4SLinus Torvalds XFRM_STATE_ERROR, 2421da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2431da177e4SLinus Torvalds XFRM_STATE_DEAD 2441da177e4SLinus Torvalds }; 2451da177e4SLinus Torvalds 24626b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 247fd2c3ef7SEric Dumazet struct km_event { 248bf08867fSHerbert Xu union { 249bf08867fSHerbert Xu u32 hard; 250bf08867fSHerbert Xu u32 proto; 251bf08867fSHerbert Xu u32 byid; 252f8cd5488SJamal Hadi Salim u32 aevent; 253f7b6983fSMasahide NAKAMURA u32 type; 254bf08867fSHerbert Xu } data; 255bf08867fSHerbert Xu 25626b15dadSJamal Hadi Salim u32 seq; 25726b15dadSJamal Hadi Salim u32 pid; 25826b15dadSJamal Hadi Salim u32 event; 2597067802eSAlexey Dobriyan struct net *net; 26026b15dadSJamal Hadi Salim }; 26126b15dadSJamal Hadi Salim 26225ee3286SHerbert Xu struct net_device; 2631da177e4SLinus Torvalds struct xfrm_type; 2641da177e4SLinus Torvalds struct xfrm_dst; 2651da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2661da177e4SLinus Torvalds unsigned short family; 2671da177e4SLinus Torvalds struct dst_ops *dst_ops; 268ddcfd796SAlexey Dobriyan void (*garbage_collect)(struct net *net); 269c5b3cf46SAlexey Dobriyan struct dst_entry *(*dst_lookup)(struct net *net, int tos, 2705e6b930fSDavid S. Miller const xfrm_address_t *saddr, 2715e6b930fSDavid S. Miller const xfrm_address_t *daddr); 272fbda33b2SAlexey Dobriyan int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr); 2731da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 274d5422efeSHerbert Xu struct flowi *fl, 275d5422efeSHerbert Xu int reverse); 27605d84025SDavid S. Miller int (*get_tos)(const struct flowi *fl); 277a1b05140SMasahide NAKAMURA int (*init_path)(struct xfrm_dst *path, 278a1b05140SMasahide NAKAMURA struct dst_entry *dst, 279a1b05140SMasahide NAKAMURA int nfheader_len); 28025ee3286SHerbert Xu int (*fill_dst)(struct xfrm_dst *xdst, 28187c1e12bSHerbert Xu struct net_device *dev, 2820c7b3eefSDavid S. Miller const struct flowi *fl); 2832774c131SDavid S. Miller struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); 2841da177e4SLinus Torvalds }; 2851da177e4SLinus Torvalds 2861da177e4SLinus Torvalds extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 2871da177e4SLinus Torvalds extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 288214e005bSDavid S. Miller extern void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c); 289214e005bSDavid S. Miller extern void km_state_notify(struct xfrm_state *x, const struct km_event *c); 2901da177e4SLinus Torvalds 2911da177e4SLinus Torvalds struct xfrm_tmpl; 292980ebd25SJamal Hadi Salim extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 29353bc6b4dSJamal Hadi Salim extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); 29453bc6b4dSJamal Hadi Salim extern int __xfrm_state_delete(struct xfrm_state *x); 29553bc6b4dSJamal Hadi Salim 2961da177e4SLinus Torvalds struct xfrm_state_afinfo { 29717c2a42aSHerbert Xu unsigned int family; 29836cf9acfSHerbert Xu unsigned int proto; 2998e3d716cSAl Viro __be16 eth_proto; 30017c2a42aSHerbert Xu struct module *owner; 301533cb5b0SEric Dumazet const struct xfrm_type *type_map[IPPROTO_MAX]; 302aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 303d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 30473e5ebb2SDavid S. Miller void (*init_tempsel)(struct xfrm_selector *sel, 30573e5ebb2SDavid S. Miller const struct flowi *fl); 30619bd6244SDavid S. Miller void (*init_temprop)(struct xfrm_state *x, 30719bd6244SDavid S. Miller const struct xfrm_tmpl *tmpl, 30819bd6244SDavid S. Miller const xfrm_address_t *daddr, 30919bd6244SDavid S. Miller const xfrm_address_t *saddr); 31041a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 31141a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 312cdca7265SMiika Komu int (*output)(struct sk_buff *skb); 313227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 314227620e2SHerbert Xu struct sk_buff *skb); 31536cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 31636cf9acfSHerbert Xu struct sk_buff *skb); 317716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 318716062fdSHerbert Xu int async); 3191da177e4SLinus Torvalds }; 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 3221da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 3251da177e4SLinus Torvalds 326fd2c3ef7SEric Dumazet struct xfrm_type { 3271da177e4SLinus Torvalds char *description; 3281da177e4SLinus Torvalds struct module *owner; 329a6337463Sjamal u8 proto; 330a6337463Sjamal u8 flags; 3311b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 332436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 333f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 334f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3351da177e4SLinus Torvalds 33672cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 3371da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 338e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3391da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 3408f029de2SDavid S. Miller int (*reject)(struct xfrm_state *, struct sk_buff *, 3418f029de2SDavid S. Miller const struct flowi *); 342aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3431da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 344c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3451da177e4SLinus Torvalds }; 3461da177e4SLinus Torvalds 347533cb5b0SEric Dumazet extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 348533cb5b0SEric Dumazet extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 3491da177e4SLinus Torvalds 350b59f45d0SHerbert Xu struct xfrm_mode { 351227620e2SHerbert Xu /* 352227620e2SHerbert Xu * Remove encapsulation header. 353227620e2SHerbert Xu * 354227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 355227620e2SHerbert Xu * header. 356227620e2SHerbert Xu * 357227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 358227620e2SHerbert Xu * should be and the network header shall be set to where the IP 359227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 360227620e2SHerbert Xu * payload. 361227620e2SHerbert Xu */ 362227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 363227620e2SHerbert Xu 364227620e2SHerbert Xu /* 365227620e2SHerbert Xu * This is the actual input entry point. 366227620e2SHerbert Xu * 367227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 368227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 369227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 370227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 371227620e2SHerbert Xu */ 372b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 37337fedd3aSHerbert Xu 37437fedd3aSHerbert Xu /* 37537fedd3aSHerbert Xu * Add encapsulation header. 37637fedd3aSHerbert Xu * 37737fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 37837fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 37937fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 38037fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 38137fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 38237fedd3aSHerbert Xu * header. The value of the network header will always point 38337fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 38437fedd3aSHerbert Xu */ 38536cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 38636cf9acfSHerbert Xu 38736cf9acfSHerbert Xu /* 38836cf9acfSHerbert Xu * This is the actual output entry point. 38936cf9acfSHerbert Xu * 39036cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 39136cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 39236cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 39336cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 39436cf9acfSHerbert Xu * call output2. 39536cf9acfSHerbert Xu */ 396eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 397b59f45d0SHerbert Xu 39817c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 399b59f45d0SHerbert Xu struct module *owner; 400b59f45d0SHerbert Xu unsigned int encap; 4011bfcb10fSHerbert Xu int flags; 4021bfcb10fSHerbert Xu }; 4031bfcb10fSHerbert Xu 4041bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 4051bfcb10fSHerbert Xu enum { 4061bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 407b59f45d0SHerbert Xu }; 408b59f45d0SHerbert Xu 409b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 410b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 411b59f45d0SHerbert Xu 412df9dcb45SKazunori MIYAZAWA static inline int xfrm_af2proto(unsigned int family) 413df9dcb45SKazunori MIYAZAWA { 414df9dcb45SKazunori MIYAZAWA switch(family) { 415df9dcb45SKazunori MIYAZAWA case AF_INET: 416df9dcb45SKazunori MIYAZAWA return IPPROTO_IPIP; 417df9dcb45SKazunori MIYAZAWA case AF_INET6: 418df9dcb45SKazunori MIYAZAWA return IPPROTO_IPV6; 419df9dcb45SKazunori MIYAZAWA default: 420df9dcb45SKazunori MIYAZAWA return 0; 421df9dcb45SKazunori MIYAZAWA } 422df9dcb45SKazunori MIYAZAWA } 423df9dcb45SKazunori MIYAZAWA 424df9dcb45SKazunori MIYAZAWA static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) 425df9dcb45SKazunori MIYAZAWA { 426df9dcb45SKazunori MIYAZAWA if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || 427df9dcb45SKazunori MIYAZAWA (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) 428df9dcb45SKazunori MIYAZAWA return x->inner_mode; 429df9dcb45SKazunori MIYAZAWA else 430df9dcb45SKazunori MIYAZAWA return x->inner_mode_iaf; 431df9dcb45SKazunori MIYAZAWA } 432df9dcb45SKazunori MIYAZAWA 433fd2c3ef7SEric Dumazet struct xfrm_tmpl { 4341da177e4SLinus Torvalds /* id in template is interpreted as: 4351da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 4361da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 4371da177e4SLinus Torvalds * daddr must be fixed too. 4381da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 4391da177e4SLinus Torvalds */ 4401da177e4SLinus Torvalds struct xfrm_id id; 4411da177e4SLinus Torvalds 4421da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 4431da177e4SLinus Torvalds xfrm_address_t saddr; 4441da177e4SLinus Torvalds 44576b3f055SMiika Komu unsigned short encap_family; 44676b3f055SMiika Komu 447a6337463Sjamal u32 reqid; 4481da177e4SLinus Torvalds 4497e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 450a6337463Sjamal u8 mode; 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 453a6337463Sjamal u8 share; 4541da177e4SLinus Torvalds 4551da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 456a6337463Sjamal u8 optional; 4571da177e4SLinus Torvalds 458c5d18e98SHerbert Xu /* Skip aalgos/ealgos/calgos checks. */ 459a6337463Sjamal u8 allalgs; 460c5d18e98SHerbert Xu 4611da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 462a6337463Sjamal u32 aalgos; 463a6337463Sjamal u32 ealgos; 464a6337463Sjamal u32 calgos; 4651da177e4SLinus Torvalds }; 4661da177e4SLinus Torvalds 467622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 4681da177e4SLinus Torvalds 46912a169e7SHerbert Xu struct xfrm_policy_walk_entry { 47012a169e7SHerbert Xu struct list_head all; 47112a169e7SHerbert Xu u8 dead; 47212a169e7SHerbert Xu }; 47312a169e7SHerbert Xu 47412a169e7SHerbert Xu struct xfrm_policy_walk { 47512a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 47612a169e7SHerbert Xu u8 type; 47712a169e7SHerbert Xu u32 seq; 47812a169e7SHerbert Xu }; 47912a169e7SHerbert Xu 480fd2c3ef7SEric Dumazet struct xfrm_policy { 4810331b1f3SAlexey Dobriyan #ifdef CONFIG_NET_NS 4820331b1f3SAlexey Dobriyan struct net *xp_net; 4830331b1f3SAlexey Dobriyan #endif 4842518c7c2SDavid S. Miller struct hlist_node bydst; 4852518c7c2SDavid S. Miller struct hlist_node byidx; 4861da177e4SLinus Torvalds 4871da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 4881da177e4SLinus Torvalds rwlock_t lock; 4891da177e4SLinus Torvalds atomic_t refcnt; 4901da177e4SLinus Torvalds struct timer_list timer; 4911da177e4SLinus Torvalds 492fe1a5f03STimo Teräs struct flow_cache_object flo; 49380c802f3STimo Teräs atomic_t genid; 4941da177e4SLinus Torvalds u32 priority; 4951da177e4SLinus Torvalds u32 index; 496bf825f81SJamal Hadi Salim struct xfrm_mark mark; 4971da177e4SLinus Torvalds struct xfrm_selector selector; 4981da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 4991da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 50012a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 50146ca5f5dSArnaldo Carvalho de Melo u8 type; 50246ca5f5dSArnaldo Carvalho de Melo u8 action; 50346ca5f5dSArnaldo Carvalho de Melo u8 flags; 50446ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 50512a169e7SHerbert Xu u16 family; 506df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 5071da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 5081da177e4SLinus Torvalds }; 5091da177e4SLinus Torvalds 51063eb23f5SDavid S. Miller static inline struct net *xp_net(const struct xfrm_policy *xp) 5110331b1f3SAlexey Dobriyan { 5120331b1f3SAlexey Dobriyan return read_pnet(&xp->xp_net); 5130331b1f3SAlexey Dobriyan } 5140331b1f3SAlexey Dobriyan 51513c1d189SArnaud Ebalard struct xfrm_kmaddress { 51613c1d189SArnaud Ebalard xfrm_address_t local; 51713c1d189SArnaud Ebalard xfrm_address_t remote; 51813c1d189SArnaud Ebalard u32 reserved; 51913c1d189SArnaud Ebalard u16 family; 52013c1d189SArnaud Ebalard }; 52113c1d189SArnaud Ebalard 52280c9abaaSShinta Sugimoto struct xfrm_migrate { 52380c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 52480c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 52580c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 52680c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 52780c9abaaSShinta Sugimoto u8 proto; 52880c9abaaSShinta Sugimoto u8 mode; 52980c9abaaSShinta Sugimoto u16 reserved; 53080c9abaaSShinta Sugimoto u32 reqid; 53180c9abaaSShinta Sugimoto u16 old_family; 53280c9abaaSShinta Sugimoto u16 new_family; 53380c9abaaSShinta Sugimoto }; 53480c9abaaSShinta Sugimoto 5351da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 536f8cd5488SJamal Hadi Salim /* which seqno */ 537f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 538f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 539f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 540f8cd5488SJamal Hadi Salim /* what happened */ 541f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 542f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 543f8cd5488SJamal Hadi Salim 544f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 545f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 546f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 547f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 548f8cd5488SJamal Hadi Salim /* default seq threshold size */ 549f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 5501da177e4SLinus Torvalds 551fd2c3ef7SEric Dumazet struct xfrm_mgr { 5521da177e4SLinus Torvalds struct list_head list; 5531da177e4SLinus Torvalds char *id; 554214e005bSDavid S. Miller int (*notify)(struct xfrm_state *x, const struct km_event *c); 5551da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 556cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 5575d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 558214e005bSDavid S. Miller int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); 559db983c11SAlexey Dobriyan int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 560183cad12SDavid S. Miller int (*migrate)(const struct xfrm_selector *sel, 561183cad12SDavid S. Miller u8 dir, u8 type, 562183cad12SDavid S. Miller const struct xfrm_migrate *m, 563183cad12SDavid S. Miller int num_bundles, 564183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 5651da177e4SLinus Torvalds }; 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 5681da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 5691da177e4SLinus Torvalds 570436a0a40SHerbert Xu /* 571436a0a40SHerbert Xu * This structure is used for the duration where packets are being 572436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 573436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 574436a0a40SHerbert Xu */ 575436a0a40SHerbert Xu struct xfrm_skb_cb { 576436a0a40SHerbert Xu union { 577436a0a40SHerbert Xu struct inet_skb_parm h4; 578436a0a40SHerbert Xu struct inet6_skb_parm h6; 579436a0a40SHerbert Xu } header; 580436a0a40SHerbert Xu 581436a0a40SHerbert Xu /* Sequence number for replay protection. */ 582b318e0e4SHerbert Xu union { 583b318e0e4SHerbert Xu u64 output; 584b318e0e4SHerbert Xu __be32 input; 585b318e0e4SHerbert Xu } seq; 586436a0a40SHerbert Xu }; 587436a0a40SHerbert Xu 588436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 589436a0a40SHerbert Xu 59036cf9acfSHerbert Xu /* 59136cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 59236cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 59336cf9acfSHerbert Xu */ 59436cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 59536cf9acfSHerbert Xu union { 59636cf9acfSHerbert Xu struct inet_skb_parm h4; 59736cf9acfSHerbert Xu struct inet6_skb_parm h6; 59836cf9acfSHerbert Xu } header; 59936cf9acfSHerbert Xu 60036cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 60136cf9acfSHerbert Xu __be16 id; 60236cf9acfSHerbert Xu __be16 frag_off; 60336cf9acfSHerbert Xu 604732c8bd5SHerbert Xu /* IP header length (excluding options or extension headers). */ 605732c8bd5SHerbert Xu u8 ihl; 606732c8bd5SHerbert Xu 60736cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 60836cf9acfSHerbert Xu u8 tos; 60936cf9acfSHerbert Xu 61036cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 61136cf9acfSHerbert Xu u8 ttl; 61236cf9acfSHerbert Xu 61336cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 61436cf9acfSHerbert Xu u8 protocol; 61536cf9acfSHerbert Xu 616732c8bd5SHerbert Xu /* Option length for IPv4, zero for IPv6. */ 617732c8bd5SHerbert Xu u8 optlen; 618732c8bd5SHerbert Xu 61936cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 62036cf9acfSHerbert Xu u8 flow_lbl[3]; 62136cf9acfSHerbert Xu }; 62236cf9acfSHerbert Xu 62336cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 62436cf9acfSHerbert Xu 625716062fdSHerbert Xu /* 626716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 627716062fdSHerbert Xu * related information. 628716062fdSHerbert Xu */ 629716062fdSHerbert Xu struct xfrm_spi_skb_cb { 630716062fdSHerbert Xu union { 631716062fdSHerbert Xu struct inet_skb_parm h4; 632716062fdSHerbert Xu struct inet6_skb_parm h6; 633716062fdSHerbert Xu } header; 634716062fdSHerbert Xu 635716062fdSHerbert Xu unsigned int daddroff; 6362fcb45b6SHerbert Xu unsigned int family; 637716062fdSHerbert Xu }; 638716062fdSHerbert Xu 639716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 640716062fdSHerbert Xu 641161a09e7SJoy Latten /* Audit Information */ 642fd2c3ef7SEric Dumazet struct xfrm_audit { 643161a09e7SJoy Latten u32 secid; 6442532386fSEric Paris uid_t loginuid; 6452532386fSEric Paris u32 sessionid; 646161a09e7SJoy Latten }; 647c9204d9cSJoy Latten 648c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 649afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 650ab5f5e8bSJoy Latten { 651ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 652ab5f5e8bSJoy Latten 653afeb14b4SPaul Moore if (audit_enabled == 0) 654afeb14b4SPaul Moore return NULL; 655ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 656ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 657ab5f5e8bSJoy Latten if (audit_buf == NULL) 658ab5f5e8bSJoy Latten return NULL; 659afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 660afeb14b4SPaul Moore return audit_buf; 661afeb14b4SPaul Moore } 662afeb14b4SPaul Moore 6632532386fSEric Paris static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid, 664afeb14b4SPaul Moore struct audit_buffer *audit_buf) 665afeb14b4SPaul Moore { 666afeb14b4SPaul Moore char *secctx; 667afeb14b4SPaul Moore u32 secctx_len; 668ab5f5e8bSJoy Latten 6692532386fSEric Paris audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); 67068277accSPaul Moore if (secid != 0 && 67168277accSPaul Moore security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { 672ab5f5e8bSJoy Latten audit_log_format(audit_buf, " subj=%s", secctx); 673ab5f5e8bSJoy Latten security_release_secctx(secctx, secctx_len); 674ab5f5e8bSJoy Latten } else 675ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 676ab5f5e8bSJoy Latten } 677ab5f5e8bSJoy Latten 678ab5f5e8bSJoy Latten extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 6792532386fSEric Paris u32 auid, u32 ses, u32 secid); 680ab5f5e8bSJoy Latten extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 6812532386fSEric Paris u32 auid, u32 ses, u32 secid); 682ab5f5e8bSJoy Latten extern void xfrm_audit_state_add(struct xfrm_state *x, int result, 6832532386fSEric Paris u32 auid, u32 ses, u32 secid); 684ab5f5e8bSJoy Latten extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, 6852532386fSEric Paris u32 auid, u32 ses, u32 secid); 686afeb14b4SPaul Moore extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 687afeb14b4SPaul Moore struct sk_buff *skb); 688afeb14b4SPaul Moore extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 689afeb14b4SPaul Moore extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 690afeb14b4SPaul Moore __be32 net_spi, __be32 net_seq); 691afeb14b4SPaul Moore extern void xfrm_audit_state_icvfail(struct xfrm_state *x, 692afeb14b4SPaul Moore struct sk_buff *skb, u8 proto); 693c9204d9cSJoy Latten #else 69441fef0eeSMarcin Slusarz 69541fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 69641fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 69741fef0eeSMarcin Slusarz { 69841fef0eeSMarcin Slusarz } 69941fef0eeSMarcin Slusarz 70041fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 70141fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 70241fef0eeSMarcin Slusarz { 70341fef0eeSMarcin Slusarz } 70441fef0eeSMarcin Slusarz 70541fef0eeSMarcin Slusarz static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, 70641fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 70741fef0eeSMarcin Slusarz { 70841fef0eeSMarcin Slusarz } 70941fef0eeSMarcin Slusarz 71041fef0eeSMarcin Slusarz static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, 71141fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 71241fef0eeSMarcin Slusarz { 71341fef0eeSMarcin Slusarz } 71441fef0eeSMarcin Slusarz 71541fef0eeSMarcin Slusarz static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 71641fef0eeSMarcin Slusarz struct sk_buff *skb) 71741fef0eeSMarcin Slusarz { 71841fef0eeSMarcin Slusarz } 71941fef0eeSMarcin Slusarz 72041fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, 72141fef0eeSMarcin Slusarz u16 family) 72241fef0eeSMarcin Slusarz { 72341fef0eeSMarcin Slusarz } 72441fef0eeSMarcin Slusarz 72541fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 72641fef0eeSMarcin Slusarz __be32 net_spi, __be32 net_seq) 72741fef0eeSMarcin Slusarz { 72841fef0eeSMarcin Slusarz } 72941fef0eeSMarcin Slusarz 73041fef0eeSMarcin Slusarz static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, 73141fef0eeSMarcin Slusarz struct sk_buff *skb, u8 proto) 73241fef0eeSMarcin Slusarz { 73341fef0eeSMarcin Slusarz } 734c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 735161a09e7SJoy Latten 7361da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 7371da177e4SLinus Torvalds { 7381da177e4SLinus Torvalds if (likely(policy != NULL)) 7391da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 7401da177e4SLinus Torvalds } 7411da177e4SLinus Torvalds 74264c31b3fSWANG Cong extern void xfrm_policy_destroy(struct xfrm_policy *policy); 7431da177e4SLinus Torvalds 7441da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 7451da177e4SLinus Torvalds { 7461da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 74764c31b3fSWANG Cong xfrm_policy_destroy(policy); 7481da177e4SLinus Torvalds } 7491da177e4SLinus Torvalds 7504e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7514e81bb83SMasahide NAKAMURA { 7524e81bb83SMasahide NAKAMURA int i; 7534e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 7544e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 7554e81bb83SMasahide NAKAMURA } 7564e81bb83SMasahide NAKAMURA 7571da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 7581da177e4SLinus Torvalds 75921380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 76021380b81SHerbert Xu { 76121380b81SHerbert Xu atomic_dec(&x->refcnt); 76221380b81SHerbert Xu } 76321380b81SHerbert Xu 7641da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 7651da177e4SLinus Torvalds { 7661da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 7671da177e4SLinus Torvalds __xfrm_state_destroy(x); 7681da177e4SLinus Torvalds } 7691da177e4SLinus Torvalds 7701da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 7711da177e4SLinus Torvalds { 7721da177e4SLinus Torvalds atomic_inc(&x->refcnt); 7731da177e4SLinus Torvalds } 7741da177e4SLinus Torvalds 7751744a8feSDavid S. Miller static inline bool addr_match(const void *token1, const void *token2, 7761744a8feSDavid S. Miller int prefixlen) 7771da177e4SLinus Torvalds { 7781744a8feSDavid S. Miller const __be32 *a1 = token1; 7791744a8feSDavid S. Miller const __be32 *a2 = token2; 7801da177e4SLinus Torvalds int pdw; 7811da177e4SLinus Torvalds int pbi; 7821da177e4SLinus Torvalds 783a6337463Sjamal pdw = prefixlen >> 5; /* num of whole u32 in prefix */ 7841da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 7851da177e4SLinus Torvalds 7861da177e4SLinus Torvalds if (pdw) 7871da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 7881744a8feSDavid S. Miller return false; 7891da177e4SLinus Torvalds 7901da177e4SLinus Torvalds if (pbi) { 7915f19343fSAl Viro __be32 mask; 7921da177e4SLinus Torvalds 7931da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 7941da177e4SLinus Torvalds 7951da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 7961744a8feSDavid S. Miller return false; 7971da177e4SLinus Torvalds } 7981da177e4SLinus Torvalds 7991744a8feSDavid S. Miller return true; 8001da177e4SLinus Torvalds } 8011da177e4SLinus Torvalds 8021da177e4SLinus Torvalds static __inline__ 8036281dcc9SDavid S. Miller __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) 8041da177e4SLinus Torvalds { 805f9d07e41SAl Viro __be16 port; 8061d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8071da177e4SLinus Torvalds case IPPROTO_TCP: 8081da177e4SLinus Torvalds case IPPROTO_UDP: 809ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8101da177e4SLinus Torvalds case IPPROTO_SCTP: 8116281dcc9SDavid S. Miller port = uli->ports.sport; 8121da177e4SLinus Torvalds break; 8131da177e4SLinus Torvalds case IPPROTO_ICMP: 8141da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8156281dcc9SDavid S. Miller port = htons(uli->icmpt.type); 8161da177e4SLinus Torvalds break; 8172ce4272aSMasahide NAKAMURA case IPPROTO_MH: 8186281dcc9SDavid S. Miller port = htons(uli->mht.type); 8192ce4272aSMasahide NAKAMURA break; 820cc9ff19dSTimo Teräs case IPPROTO_GRE: 8216281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) >> 16); 822cc9ff19dSTimo Teräs break; 8231da177e4SLinus Torvalds default: 8241da177e4SLinus Torvalds port = 0; /*XXX*/ 8251da177e4SLinus Torvalds } 8261da177e4SLinus Torvalds return port; 8271da177e4SLinus Torvalds } 8281da177e4SLinus Torvalds 8291da177e4SLinus Torvalds static __inline__ 8306281dcc9SDavid S. Miller __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) 8311da177e4SLinus Torvalds { 832f9d07e41SAl Viro __be16 port; 8331d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8341da177e4SLinus Torvalds case IPPROTO_TCP: 8351da177e4SLinus Torvalds case IPPROTO_UDP: 836ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8371da177e4SLinus Torvalds case IPPROTO_SCTP: 8386281dcc9SDavid S. Miller port = uli->ports.dport; 8391da177e4SLinus Torvalds break; 8401da177e4SLinus Torvalds case IPPROTO_ICMP: 8411da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8426281dcc9SDavid S. Miller port = htons(uli->icmpt.code); 8431da177e4SLinus Torvalds break; 844cc9ff19dSTimo Teräs case IPPROTO_GRE: 8456281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) & 0xffff); 846cc9ff19dSTimo Teräs break; 8471da177e4SLinus Torvalds default: 8481da177e4SLinus Torvalds port = 0; /*XXX*/ 8491da177e4SLinus Torvalds } 8501da177e4SLinus Torvalds return port; 8511da177e4SLinus Torvalds } 8521da177e4SLinus Torvalds 853200ce96eSDavid S. Miller extern int xfrm_selector_match(const struct xfrm_selector *sel, 854e1ad2ab2SDavid S. Miller const struct flowi *fl, 85577681021SAndrew Morton unsigned short family); 8561da177e4SLinus Torvalds 857df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 858df71837dSTrent Jaeger /* If neither has a context --> match 859df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 860df71837dSTrent Jaeger */ 861df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 862df71837dSTrent Jaeger { 863df71837dSTrent Jaeger return ((!s1 && !s2) || 864df71837dSTrent Jaeger (s1 && s2 && 865df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 866df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 867df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 868df71837dSTrent Jaeger } 869df71837dSTrent Jaeger #else 870df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 871df71837dSTrent Jaeger { 872df71837dSTrent Jaeger return 1; 873df71837dSTrent Jaeger } 874df71837dSTrent Jaeger #endif 875df71837dSTrent Jaeger 8761da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 8771da177e4SLinus Torvalds * 8781da177e4SLinus Torvalds * dst->child points to the next element of bundle. 8791da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 8801da177e4SLinus Torvalds * 8811da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 8821da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 8831da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 8841da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 8851da177e4SLinus Torvalds * policy rule. 8861da177e4SLinus Torvalds */ 887fd2c3ef7SEric Dumazet struct xfrm_dst { 8881da177e4SLinus Torvalds union { 8891da177e4SLinus Torvalds struct dst_entry dst; 8901da177e4SLinus Torvalds struct rtable rt; 8911da177e4SLinus Torvalds struct rt6_info rt6; 8921da177e4SLinus Torvalds } u; 8931da177e4SLinus Torvalds struct dst_entry *route; 89480c802f3STimo Teräs struct flow_cache_object flo; 89580c802f3STimo Teräs struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; 89680c802f3STimo Teräs int num_pols, num_xfrms; 897157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 898157bfc25SMasahide NAKAMURA struct flowi *origin; 899157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 900157bfc25SMasahide NAKAMURA #endif 90180c802f3STimo Teräs u32 xfrm_genid; 90280c802f3STimo Teräs u32 policy_genid; 9031da177e4SLinus Torvalds u32 route_mtu_cached; 9041da177e4SLinus Torvalds u32 child_mtu_cached; 90592d63decSHideaki YOSHIFUJI u32 route_cookie; 90692d63decSHideaki YOSHIFUJI u32 path_cookie; 9071da177e4SLinus Torvalds }; 9081da177e4SLinus Torvalds 909def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 910aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 911aabc9761SHerbert Xu { 91280c802f3STimo Teräs xfrm_pols_put(xdst->pols, xdst->num_pols); 913aabc9761SHerbert Xu dst_release(xdst->route); 914aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 915aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 916157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 917157bfc25SMasahide NAKAMURA kfree(xdst->origin); 918157bfc25SMasahide NAKAMURA xdst->origin = NULL; 919157bfc25SMasahide NAKAMURA kfree(xdst->partner); 920157bfc25SMasahide NAKAMURA xdst->partner = NULL; 921157bfc25SMasahide NAKAMURA #endif 922aabc9761SHerbert Xu } 923def8b4faSAlexey Dobriyan #endif 924aabc9761SHerbert Xu 925aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 926aabc9761SHerbert Xu 927fd2c3ef7SEric Dumazet struct sec_path { 9281da177e4SLinus Torvalds atomic_t refcnt; 9291da177e4SLinus Torvalds int len; 930dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 9311da177e4SLinus Torvalds }; 9321da177e4SLinus Torvalds 9331da177e4SLinus Torvalds static inline struct sec_path * 9341da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 9351da177e4SLinus Torvalds { 9361da177e4SLinus Torvalds if (sp) 9371da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 9381da177e4SLinus Torvalds return sp; 9391da177e4SLinus Torvalds } 9401da177e4SLinus Torvalds 9411da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 9421da177e4SLinus Torvalds 9431da177e4SLinus Torvalds static inline void 9441da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 9451da177e4SLinus Torvalds { 9461da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 9471da177e4SLinus Torvalds __secpath_destroy(sp); 9481da177e4SLinus Torvalds } 9491da177e4SLinus Torvalds 9501da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 9511da177e4SLinus Torvalds 9521da177e4SLinus Torvalds static inline void 9531da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 9541da177e4SLinus Torvalds { 9551da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9561da177e4SLinus Torvalds secpath_put(skb->sp); 9571da177e4SLinus Torvalds skb->sp = NULL; 9581da177e4SLinus Torvalds #endif 9591da177e4SLinus Torvalds } 9601da177e4SLinus Torvalds 9611da177e4SLinus Torvalds static inline int 9626cc32961SDavid S. Miller xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) 963a1e59abfSPatrick McHardy { 964a1e59abfSPatrick McHardy switch (family) { 965a1e59abfSPatrick McHardy case AF_INET: 966a1e59abfSPatrick McHardy return addr->a4 == 0; 967a1e59abfSPatrick McHardy case AF_INET6: 968a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 969a1e59abfSPatrick McHardy } 970a1e59abfSPatrick McHardy return 0; 971a1e59abfSPatrick McHardy } 972a1e59abfSPatrick McHardy 973a1e59abfSPatrick McHardy static inline int 97421eddb5cSDavid S. Miller __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 9751da177e4SLinus Torvalds { 9761da177e4SLinus Torvalds return (tmpl->saddr.a4 && 9771da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 9781da177e4SLinus Torvalds } 9791da177e4SLinus Torvalds 9801da177e4SLinus Torvalds static inline int 98121eddb5cSDavid S. Miller __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 9821da177e4SLinus Torvalds { 9831da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 9841da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 9851da177e4SLinus Torvalds } 9861da177e4SLinus Torvalds 9871da177e4SLinus Torvalds static inline int 98821eddb5cSDavid S. Miller xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) 9891da177e4SLinus Torvalds { 9901da177e4SLinus Torvalds switch (family) { 9911da177e4SLinus Torvalds case AF_INET: 9921da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 9931da177e4SLinus Torvalds case AF_INET6: 9941da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 9951da177e4SLinus Torvalds } 9961da177e4SLinus Torvalds return !0; 9971da177e4SLinus Torvalds } 9981da177e4SLinus Torvalds 9991da177e4SLinus Torvalds #ifdef CONFIG_XFRM 10001da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 10011da177e4SLinus Torvalds 1002d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 1003d5422efeSHerbert Xu struct sk_buff *skb, 1004d5422efeSHerbert Xu unsigned int family, int reverse) 10051da177e4SLinus Torvalds { 1006f6e1e25dSAlexey Dobriyan struct net *net = dev_net(skb->dev); 1007d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 1008d5422efeSHerbert Xu 10091da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 1010d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 10111da177e4SLinus Torvalds 1012f6e1e25dSAlexey Dobriyan return (!net->xfrm.policy_count[dir] && !skb->sp) || 1013adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOPOLICY) || 1014d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 1015d5422efeSHerbert Xu } 1016d5422efeSHerbert Xu 1017d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 1018d5422efeSHerbert Xu { 1019d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 10201da177e4SLinus Torvalds } 10211da177e4SLinus Torvalds 10221da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10231da177e4SLinus Torvalds { 10241da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 10251da177e4SLinus Torvalds } 10261da177e4SLinus Torvalds 10271da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10281da177e4SLinus Torvalds { 10291da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 10301da177e4SLinus Torvalds } 10311da177e4SLinus Torvalds 1032d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1033d5422efeSHerbert Xu struct sk_buff *skb) 1034d5422efeSHerbert Xu { 1035d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 1036d5422efeSHerbert Xu } 1037d5422efeSHerbert Xu 1038d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1039d5422efeSHerbert Xu struct sk_buff *skb) 1040d5422efeSHerbert Xu { 1041d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 1042d5422efeSHerbert Xu } 1043d5422efeSHerbert Xu 1044d5422efeSHerbert Xu extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1045d5422efeSHerbert Xu unsigned int family, int reverse); 1046d5422efeSHerbert Xu 1047d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1048d5422efeSHerbert Xu unsigned int family) 1049d5422efeSHerbert Xu { 1050d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 1051d5422efeSHerbert Xu } 1052d5422efeSHerbert Xu 1053d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1054d5422efeSHerbert Xu struct flowi *fl, 1055d5422efeSHerbert Xu unsigned int family) 1056d5422efeSHerbert Xu { 1057d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 1058d5422efeSHerbert Xu } 1059d5422efeSHerbert Xu 10601da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 10611da177e4SLinus Torvalds 10621da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 10631da177e4SLinus Torvalds { 106499a66657SAlexey Dobriyan struct net *net = dev_net(skb->dev); 106599a66657SAlexey Dobriyan 106699a66657SAlexey Dobriyan return !net->xfrm.policy_count[XFRM_POLICY_OUT] || 1067adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOXFRM) || 10681da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 10691da177e4SLinus Torvalds } 10701da177e4SLinus Torvalds 10711da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 10721da177e4SLinus Torvalds { 10731da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 10741da177e4SLinus Torvalds } 10751da177e4SLinus Torvalds 10761da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 10771da177e4SLinus Torvalds { 10781da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 10791da177e4SLinus Torvalds } 10801da177e4SLinus Torvalds 10811da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 10821da177e4SLinus Torvalds 10831da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 10841da177e4SLinus Torvalds { 10851da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 10861da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 10871da177e4SLinus Torvalds return 0; 10881da177e4SLinus Torvalds } 10891da177e4SLinus Torvalds 10904666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 10911da177e4SLinus Torvalds 10921da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 10931da177e4SLinus Torvalds { 10941da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 10951da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 10961da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 10971da177e4SLinus Torvalds } 10981da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 10991da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 11001da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 11011da177e4SLinus Torvalds } 11021da177e4SLinus Torvalds } 11031da177e4SLinus Torvalds 11041da177e4SLinus Torvalds #else 11051da177e4SLinus Torvalds 11061da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 11071da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 11081da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 11091da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 11101da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11111da177e4SLinus Torvalds { 11121da177e4SLinus Torvalds return 1; 11131da177e4SLinus Torvalds } 11141da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11151da177e4SLinus Torvalds { 11161da177e4SLinus Torvalds return 1; 11171da177e4SLinus Torvalds } 11181da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 11191da177e4SLinus Torvalds { 11201da177e4SLinus Torvalds return 1; 11211da177e4SLinus Torvalds } 1122d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1123d5422efeSHerbert Xu struct flowi *fl, 1124d5422efeSHerbert Xu unsigned int family) 1125d5422efeSHerbert Xu { 1126d5422efeSHerbert Xu return -ENOSYS; 1127d5422efeSHerbert Xu } 1128d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1129d5422efeSHerbert Xu struct sk_buff *skb) 1130d5422efeSHerbert Xu { 1131d5422efeSHerbert Xu return 1; 1132d5422efeSHerbert Xu } 1133d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1134d5422efeSHerbert Xu struct sk_buff *skb) 1135d5422efeSHerbert Xu { 1136d5422efeSHerbert Xu return 1; 1137d5422efeSHerbert Xu } 11381da177e4SLinus Torvalds #endif 11391da177e4SLinus Torvalds 11401da177e4SLinus Torvalds static __inline__ 1141e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) 11421da177e4SLinus Torvalds { 11431da177e4SLinus Torvalds switch (family){ 11441da177e4SLinus Torvalds case AF_INET: 11451da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_dst; 11461da177e4SLinus Torvalds case AF_INET6: 11471da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_dst; 11481da177e4SLinus Torvalds } 11491da177e4SLinus Torvalds return NULL; 11501da177e4SLinus Torvalds } 11511da177e4SLinus Torvalds 11521da177e4SLinus Torvalds static __inline__ 1153e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) 11541da177e4SLinus Torvalds { 11551da177e4SLinus Torvalds switch (family){ 11561da177e4SLinus Torvalds case AF_INET: 11571da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_src; 11581da177e4SLinus Torvalds case AF_INET6: 11591da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_src; 11601da177e4SLinus Torvalds } 11611da177e4SLinus Torvalds return NULL; 11621da177e4SLinus Torvalds } 11631da177e4SLinus Torvalds 11649bb182a7SYOSHIFUJI Hideaki static __inline__ 1165e8a4e377SDavid S. Miller void xfrm_flowi_addr_get(const struct flowi *fl, 11669bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 11679bb182a7SYOSHIFUJI Hideaki unsigned short family) 11689bb182a7SYOSHIFUJI Hideaki { 11699bb182a7SYOSHIFUJI Hideaki switch(family) { 11709bb182a7SYOSHIFUJI Hideaki case AF_INET: 11719bb182a7SYOSHIFUJI Hideaki memcpy(&saddr->a4, &fl->fl4_src, sizeof(saddr->a4)); 11729bb182a7SYOSHIFUJI Hideaki memcpy(&daddr->a4, &fl->fl4_dst, sizeof(daddr->a4)); 11739bb182a7SYOSHIFUJI Hideaki break; 11749bb182a7SYOSHIFUJI Hideaki case AF_INET6: 11759bb182a7SYOSHIFUJI Hideaki ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->fl6_src); 11769bb182a7SYOSHIFUJI Hideaki ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->fl6_dst); 11779bb182a7SYOSHIFUJI Hideaki break; 11789bb182a7SYOSHIFUJI Hideaki } 11799bb182a7SYOSHIFUJI Hideaki } 11809bb182a7SYOSHIFUJI Hideaki 11811da177e4SLinus Torvalds static __inline__ int 1182f8848067SDavid S. Miller __xfrm4_state_addr_check(const struct xfrm_state *x, 1183f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 11841da177e4SLinus Torvalds { 11851da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 11861da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 11871da177e4SLinus Torvalds return 1; 11881da177e4SLinus Torvalds return 0; 11891da177e4SLinus Torvalds } 11901da177e4SLinus Torvalds 11911da177e4SLinus Torvalds static __inline__ int 1192f8848067SDavid S. Miller __xfrm6_state_addr_check(const struct xfrm_state *x, 1193f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 11941da177e4SLinus Torvalds { 11951da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 11961da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 11971da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 11981da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 11991da177e4SLinus Torvalds return 1; 12001da177e4SLinus Torvalds return 0; 12011da177e4SLinus Torvalds } 12021da177e4SLinus Torvalds 12031da177e4SLinus Torvalds static __inline__ int 1204f8848067SDavid S. Miller xfrm_state_addr_check(const struct xfrm_state *x, 1205f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr, 12061da177e4SLinus Torvalds unsigned short family) 12071da177e4SLinus Torvalds { 12081da177e4SLinus Torvalds switch (family) { 12091da177e4SLinus Torvalds case AF_INET: 12101da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 12111da177e4SLinus Torvalds case AF_INET6: 12121da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 12131da177e4SLinus Torvalds } 12141da177e4SLinus Torvalds return 0; 12151da177e4SLinus Torvalds } 12161da177e4SLinus Torvalds 1217e53820deSMasahide NAKAMURA static __inline__ int 1218f8848067SDavid S. Miller xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, 1219e53820deSMasahide NAKAMURA unsigned short family) 1220e53820deSMasahide NAKAMURA { 1221e53820deSMasahide NAKAMURA switch (family) { 1222e53820deSMasahide NAKAMURA case AF_INET: 1223e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 1224f8848067SDavid S. Miller (const xfrm_address_t *)&fl->fl4_dst, 1225f8848067SDavid S. Miller (const xfrm_address_t *)&fl->fl4_src); 1226e53820deSMasahide NAKAMURA case AF_INET6: 1227e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 1228f8848067SDavid S. Miller (const xfrm_address_t *)&fl->fl6_dst, 1229f8848067SDavid S. Miller (const xfrm_address_t *)&fl->fl6_src); 1230e53820deSMasahide NAKAMURA } 1231e53820deSMasahide NAKAMURA return 0; 1232e53820deSMasahide NAKAMURA } 1233e53820deSMasahide NAKAMURA 1234f8848067SDavid S. Miller static inline int xfrm_state_kern(const struct xfrm_state *x) 12351da177e4SLinus Torvalds { 12361da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 12371da177e4SLinus Torvalds } 12381da177e4SLinus Torvalds 12395794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 12405794708fSMasahide NAKAMURA { 1241dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1242dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1243dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1244dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 12455794708fSMasahide NAKAMURA } 12465794708fSMasahide NAKAMURA 12471da177e4SLinus Torvalds /* 12481da177e4SLinus Torvalds * xfrm algorithm information 12491da177e4SLinus Torvalds */ 12501a6509d9SHerbert Xu struct xfrm_algo_aead_info { 12511a6509d9SHerbert Xu u16 icv_truncbits; 12521a6509d9SHerbert Xu }; 12531a6509d9SHerbert Xu 12541da177e4SLinus Torvalds struct xfrm_algo_auth_info { 12551da177e4SLinus Torvalds u16 icv_truncbits; 12561da177e4SLinus Torvalds u16 icv_fullbits; 12571da177e4SLinus Torvalds }; 12581da177e4SLinus Torvalds 12591da177e4SLinus Torvalds struct xfrm_algo_encr_info { 12601da177e4SLinus Torvalds u16 blockbits; 12611da177e4SLinus Torvalds u16 defkeybits; 12621da177e4SLinus Torvalds }; 12631da177e4SLinus Torvalds 12641da177e4SLinus Torvalds struct xfrm_algo_comp_info { 12651da177e4SLinus Torvalds u16 threshold; 12661da177e4SLinus Torvalds }; 12671da177e4SLinus Torvalds 12681da177e4SLinus Torvalds struct xfrm_algo_desc { 12691da177e4SLinus Torvalds char *name; 127004ff1260SHerbert Xu char *compat; 12711da177e4SLinus Torvalds u8 available:1; 12721da177e4SLinus Torvalds union { 12731a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 12741da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 12751da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 12761da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 12771da177e4SLinus Torvalds } uinfo; 12781da177e4SLinus Torvalds struct sadb_alg desc; 12791da177e4SLinus Torvalds }; 12801da177e4SLinus Torvalds 12811da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 12821da177e4SLinus Torvalds struct xfrm_tunnel { 12831da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1284a6337463Sjamal int (*err_handler)(struct sk_buff *skb, u32 info); 1285d2acc347SHerbert Xu 1286b33eab08SEric Dumazet struct xfrm_tunnel __rcu *next; 1287d2acc347SHerbert Xu int priority; 12881da177e4SLinus Torvalds }; 12891da177e4SLinus Torvalds 12901da177e4SLinus Torvalds struct xfrm6_tunnel { 1291d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1292d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 1293d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info); 12946f0bcf15SEric Dumazet struct xfrm6_tunnel __rcu *next; 1295d2acc347SHerbert Xu int priority; 12961da177e4SLinus Torvalds }; 12971da177e4SLinus Torvalds 12981da177e4SLinus Torvalds extern void xfrm_init(void); 1299a33bc5c1SNeil Horman extern void xfrm4_init(int rt_hash_size); 1300d62ddc21SAlexey Dobriyan extern int xfrm_state_init(struct net *net); 1301d62ddc21SAlexey Dobriyan extern void xfrm_state_fini(struct net *net); 13021da177e4SLinus Torvalds extern void xfrm4_state_init(void); 1303c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1304c35b7e72SDaniel Lezcano extern int xfrm6_init(void); 1305c35b7e72SDaniel Lezcano extern void xfrm6_fini(void); 13060013cabaSDaniel Lezcano extern int xfrm6_state_init(void); 13071da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 1308c35b7e72SDaniel Lezcano #else 1309c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1310c35b7e72SDaniel Lezcano { 1311c35b7e72SDaniel Lezcano return 0; 1312c35b7e72SDaniel Lezcano } 1313c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1314c35b7e72SDaniel Lezcano { 1315c35b7e72SDaniel Lezcano ; 1316c35b7e72SDaniel Lezcano } 1317c35b7e72SDaniel Lezcano #endif 13181da177e4SLinus Torvalds 1319558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1320c68cd1a0SAlexey Dobriyan extern int xfrm_proc_init(struct net *net); 1321c68cd1a0SAlexey Dobriyan extern void xfrm_proc_fini(struct net *net); 1322558f82efSMasahide NAKAMURA #endif 1323558f82efSMasahide NAKAMURA 1324b27aeadbSAlexey Dobriyan extern int xfrm_sysctl_init(struct net *net); 1325b27aeadbSAlexey Dobriyan #ifdef CONFIG_SYSCTL 1326b27aeadbSAlexey Dobriyan extern void xfrm_sysctl_fini(struct net *net); 1327b27aeadbSAlexey Dobriyan #else 1328b27aeadbSAlexey Dobriyan static inline void xfrm_sysctl_fini(struct net *net) 1329b27aeadbSAlexey Dobriyan { 1330b27aeadbSAlexey Dobriyan } 1331b27aeadbSAlexey Dobriyan #endif 1332b27aeadbSAlexey Dobriyan 13335c182458SHerbert Xu extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); 1334284fa7daSAlexey Dobriyan extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 13354c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1336abb81c4fSHerbert Xu extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); 1337673c09beSAlexey Dobriyan extern struct xfrm_state *xfrm_state_alloc(struct net *net); 133833765d06SDavid S. Miller extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, 133933765d06SDavid S. Miller const xfrm_address_t *saddr, 1340b520e9f6SDavid S. Miller const struct flowi *fl, 1341b520e9f6SDavid S. Miller struct xfrm_tmpl *tmpl, 13421da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 13431da177e4SLinus Torvalds unsigned short family); 1344bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, 13455447c5e4SAlexey Dobriyan xfrm_address_t *daddr, 1346628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1347628529b6SJamal Hadi Salim unsigned short family, 1348628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 13491da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 13501da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 13511da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 13521da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1353bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, 1354a70486f0SDavid S. Miller const xfrm_address_t *daddr, __be32 spi, 1355bd55775cSJamal Hadi Salim u8 proto, unsigned short family); 1356bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, 1357a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1358a70486f0SDavid S. Miller const xfrm_address_t *saddr, 1359bd55775cSJamal Hadi Salim u8 proto, 1360bd55775cSJamal Hadi Salim unsigned short family); 136141a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 136241a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 136341a49cc3SMasahide NAKAMURA int n, unsigned short family); 136441a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 136541a49cc3SMasahide NAKAMURA int n, unsigned short family); 136641a49cc3SMasahide NAKAMURA #else 136741a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 136841a49cc3SMasahide NAKAMURA int n, unsigned short family) 136941a49cc3SMasahide NAKAMURA { 137041a49cc3SMasahide NAKAMURA return -ENOSYS; 137141a49cc3SMasahide NAKAMURA } 137241a49cc3SMasahide NAKAMURA 137341a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 137441a49cc3SMasahide NAKAMURA int n, unsigned short family) 137541a49cc3SMasahide NAKAMURA { 137641a49cc3SMasahide NAKAMURA return -ENOSYS; 137741a49cc3SMasahide NAKAMURA } 137841a49cc3SMasahide NAKAMURA #endif 1379af11e316SJamal Hadi Salim 1380af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1381af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1382af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1383af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1384af11e316SJamal Hadi Salim }; 1385af11e316SJamal Hadi Salim 13865a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 13875a6d3416SJamal Hadi Salim u32 incnt; 13885a6d3416SJamal Hadi Salim u32 outcnt; 13895a6d3416SJamal Hadi Salim u32 fwdcnt; 13905a6d3416SJamal Hadi Salim u32 inscnt; 13915a6d3416SJamal Hadi Salim u32 outscnt; 13925a6d3416SJamal Hadi Salim u32 fwdscnt; 13935a6d3416SJamal Hadi Salim u32 spdhcnt; 13945a6d3416SJamal Hadi Salim u32 spdhmcnt; 13955a6d3416SJamal Hadi Salim }; 13965a6d3416SJamal Hadi Salim 1397bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, 1398bd55775cSJamal Hadi Salim u32 seq); 139926b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 14000e602451SAlexey Dobriyan extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); 1401e071041bSAlexey Dobriyan extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); 1402e071041bSAlexey Dobriyan extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); 1403afeb14b4SPaul Moore extern int xfrm_replay_check(struct xfrm_state *x, 1404afeb14b4SPaul Moore struct sk_buff *skb, __be32 seq); 140561f4627bSAl Viro extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); 1406f8cd5488SJamal Hadi Salim extern void xfrm_replay_notify(struct xfrm_state *x, int event); 14071da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 140872cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1409227620e2SHerbert Xu extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1410716062fdSHerbert Xu extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, 1411716062fdSHerbert Xu int encap_type); 14121bf06cd2SHerbert Xu extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1413c6581a45SHerbert Xu extern int xfrm_output_resume(struct sk_buff *skb, int err); 1414406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 1415df9dcb45SKazunori MIYAZAWA extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 141636cf9acfSHerbert Xu extern int xfrm4_extract_header(struct sk_buff *skb); 1417227620e2SHerbert Xu extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1418c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1419c4541b41SHerbert Xu int encap_type); 1420716062fdSHerbert Xu extern int xfrm4_transport_finish(struct sk_buff *skb, int async); 14211da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1422c4541b41SHerbert Xu 1423c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1424c4541b41SHerbert Xu { 1425c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1426c4541b41SHerbert Xu } 1427c4541b41SHerbert Xu 142836cf9acfSHerbert Xu extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 142936cf9acfSHerbert Xu extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14301da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 1431c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1432c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 143336cf9acfSHerbert Xu extern int xfrm6_extract_header(struct sk_buff *skb); 1434227620e2SHerbert Xu extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 143533b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1436716062fdSHerbert Xu extern int xfrm6_transport_finish(struct sk_buff *skb, int async); 1437e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1438fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1439fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 144073d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 144173d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 1442a1664773SAlexey Dobriyan extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); 1443a1664773SAlexey Dobriyan extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, xfrm_address_t *saddr); 144436cf9acfSHerbert Xu extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 144536cf9acfSHerbert Xu extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14461da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 1447aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1448aee5adb4SMasahide NAKAMURA u8 **prevhdr); 14491da177e4SLinus Torvalds 14501da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1451067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 14521da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 14531da177e4SLinus Torvalds #else 14541da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 14551da177e4SLinus Torvalds { 14561da177e4SLinus Torvalds return -ENOPROTOOPT; 14571da177e4SLinus Torvalds } 14581da177e4SLinus Torvalds 1459067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 14601da177e4SLinus Torvalds { 14611da177e4SLinus Torvalds /* should not happen */ 14621da177e4SLinus Torvalds kfree_skb(skb); 14631da177e4SLinus Torvalds return 0; 14641da177e4SLinus Torvalds } 14651da177e4SLinus Torvalds #endif 14661da177e4SLinus Torvalds 14670331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 14684c563f76STimo Teras 146912a169e7SHerbert Xu extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 1470cdcbca7cSAlexey Dobriyan extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, 14714c563f76STimo Teras int (*func)(struct xfrm_policy *, int, int, void*), void *); 147212a169e7SHerbert Xu extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); 14731da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 14748ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, 14758ca2e93bSJamal Hadi Salim u8 type, int dir, 14764e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1477ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1478ef41aaa0SEric Paris int *err); 14798ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err); 148033ffbbd5SAlexey Dobriyan int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); 14811da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1482658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 1483bd55775cSJamal Hadi Salim struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark, 1484bd55775cSJamal Hadi Salim u8 mode, u32 reqid, u8 proto, 1485a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1486a70486f0SDavid S. Miller const xfrm_address_t *saddr, int create, 1487bd55775cSJamal Hadi Salim unsigned short family); 14881da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 14891da177e4SLinus Torvalds 149080c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1491183cad12SDavid S. Miller extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 1492183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_bundles, 1493183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 149480c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 149580c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 149680c9abaaSShinta Sugimoto struct xfrm_migrate *m); 1497b4b7c0b3SDavid S. Miller extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 149813c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 149913c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 150080c9abaaSShinta Sugimoto #endif 150180c9abaaSShinta Sugimoto 15025d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 15036c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 1504db983c11SAlexey Dobriyan extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 15051da177e4SLinus Torvalds 15061da177e4SLinus Torvalds extern void xfrm_input_init(void); 15076067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 15081da177e4SLinus Torvalds 15091da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 15101da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 15111da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 15121da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 15131da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 15141da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 15151da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 15161da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 15176f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); 15186f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); 15196f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); 15206f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, 15211a6509d9SHerbert Xu int probe); 15221da177e4SLinus Torvalds 152307d4ee58SHerbert Xu struct hash_desc; 15249409f38aSHerbert Xu struct scatterlist; 152507d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 152607d4ee58SHerbert Xu unsigned int); 15271da177e4SLinus Torvalds 1528ff6acd16SDavid S. Miller static inline int xfrm_addr_cmp(const xfrm_address_t *a, 1529ff6acd16SDavid S. Miller const xfrm_address_t *b, 15301da177e4SLinus Torvalds int family) 15311da177e4SLinus Torvalds { 15321da177e4SLinus Torvalds switch (family) { 15331da177e4SLinus Torvalds default: 15341da177e4SLinus Torvalds case AF_INET: 1535a6337463Sjamal return (__force u32)a->a4 - (__force u32)b->a4; 15361da177e4SLinus Torvalds case AF_INET6: 15371da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 15381da177e4SLinus Torvalds (struct in6_addr *)b); 15391da177e4SLinus Torvalds } 15401da177e4SLinus Torvalds } 15411da177e4SLinus Torvalds 154277d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 154377d8d7a6SHerbert Xu { 154477d8d7a6SHerbert Xu return index & 7; 154577d8d7a6SHerbert Xu } 154677d8d7a6SHerbert Xu 1547a6483b79SAlexey Dobriyan #ifdef CONFIG_XFRM 1548a6483b79SAlexey Dobriyan static inline int xfrm_aevent_is_on(struct net *net) 1549f8cd5488SJamal Hadi Salim { 1550be33690dSPatrick McHardy struct sock *nlsk; 1551be33690dSPatrick McHardy int ret = 0; 1552be33690dSPatrick McHardy 1553be33690dSPatrick McHardy rcu_read_lock(); 1554a6483b79SAlexey Dobriyan nlsk = rcu_dereference(net->xfrm.nlsk); 1555be33690dSPatrick McHardy if (nlsk) 1556be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1557be33690dSPatrick McHardy rcu_read_unlock(); 1558be33690dSPatrick McHardy return ret; 1559f8cd5488SJamal Hadi Salim } 1560a6483b79SAlexey Dobriyan #endif 1561f8cd5488SJamal Hadi Salim 156285158621SDavid S. Miller static inline int xfrm_alg_len(const struct xfrm_algo *alg) 15630f99be0dSEric Dumazet { 15640f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 15650f99be0dSEric Dumazet } 15660f99be0dSEric Dumazet 156785158621SDavid S. Miller static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) 15684447bb33SMartin Willi { 15694447bb33SMartin Willi return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 15704447bb33SMartin Willi } 15714447bb33SMartin Willi 157280c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 157380c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 157480c9abaaSShinta Sugimoto { 15750f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 157680c9abaaSShinta Sugimoto } 157780c9abaaSShinta Sugimoto 15784447bb33SMartin Willi static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) 15794447bb33SMartin Willi { 15804447bb33SMartin Willi return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); 15814447bb33SMartin Willi } 15824447bb33SMartin Willi 158380c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 158480c9abaaSShinta Sugimoto { 158580c9abaaSShinta Sugimoto int i; 158680c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 158780c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 158880c9abaaSShinta Sugimoto } 158980c9abaaSShinta Sugimoto 159080c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 159180c9abaaSShinta Sugimoto { 159280c9abaaSShinta Sugimoto int i; 159380c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 159480c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 159580c9abaaSShinta Sugimoto } 159680c9abaaSShinta Sugimoto #endif 1597f8cd5488SJamal Hadi Salim 1598def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 159900501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 160000501121SHerbert Xu { 160100501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 160200501121SHerbert Xu } 1603def8b4faSAlexey Dobriyan #endif 160400501121SHerbert Xu 1605bf825f81SJamal Hadi Salim static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) 1606bf825f81SJamal Hadi Salim { 1607bf825f81SJamal Hadi Salim if (attrs[XFRMA_MARK]) 16084efd7e83SAndreas Steffen memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); 1609bf825f81SJamal Hadi Salim else 1610bf825f81SJamal Hadi Salim m->v = m->m = 0; 1611bf825f81SJamal Hadi Salim 1612bf825f81SJamal Hadi Salim return m->v & m->m; 1613bf825f81SJamal Hadi Salim } 1614bf825f81SJamal Hadi Salim 1615e3dfa389SDavid S. Miller static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) 1616bf825f81SJamal Hadi Salim { 1617bf825f81SJamal Hadi Salim if (m->m | m->v) 1618bf825f81SJamal Hadi Salim NLA_PUT(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); 1619bf825f81SJamal Hadi Salim return 0; 1620bf825f81SJamal Hadi Salim 1621bf825f81SJamal Hadi Salim nla_put_failure: 1622bf825f81SJamal Hadi Salim return -1; 1623bf825f81SJamal Hadi Salim } 1624bf825f81SJamal Hadi Salim 16251da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1626