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, 270c5b3cf46SAlexey Dobriyan xfrm_address_t *saddr, 27166cdb3caSHerbert Xu 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); 2831da177e4SLinus Torvalds }; 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 2861da177e4SLinus Torvalds extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 28726b15dadSJamal Hadi Salim extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); 28826b15dadSJamal Hadi Salim extern void km_state_notify(struct xfrm_state *x, struct km_event *c); 2891da177e4SLinus Torvalds 2901da177e4SLinus Torvalds struct xfrm_tmpl; 291980ebd25SJamal Hadi Salim extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 29253bc6b4dSJamal Hadi Salim extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); 29353bc6b4dSJamal Hadi Salim extern int __xfrm_state_delete(struct xfrm_state *x); 29453bc6b4dSJamal Hadi Salim 2951da177e4SLinus Torvalds struct xfrm_state_afinfo { 29617c2a42aSHerbert Xu unsigned int family; 29736cf9acfSHerbert Xu unsigned int proto; 2988e3d716cSAl Viro __be16 eth_proto; 29917c2a42aSHerbert Xu struct module *owner; 300533cb5b0SEric Dumazet const struct xfrm_type *type_map[IPPROTO_MAX]; 301aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 302d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 30373e5ebb2SDavid S. Miller void (*init_tempsel)(struct xfrm_selector *sel, 30473e5ebb2SDavid S. Miller const struct flowi *fl); 3058444cf71SThomas Egerer void (*init_temprop)(struct xfrm_state *x, struct xfrm_tmpl *tmpl, 3061da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr); 30741a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 30841a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 309cdca7265SMiika Komu int (*output)(struct sk_buff *skb); 310227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 311227620e2SHerbert Xu struct sk_buff *skb); 31236cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 31336cf9acfSHerbert Xu struct sk_buff *skb); 314716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 315716062fdSHerbert Xu int async); 3161da177e4SLinus Torvalds }; 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 3191da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 3221da177e4SLinus Torvalds 323fd2c3ef7SEric Dumazet struct xfrm_type { 3241da177e4SLinus Torvalds char *description; 3251da177e4SLinus Torvalds struct module *owner; 326a6337463Sjamal u8 proto; 327a6337463Sjamal u8 flags; 3281b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 329436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 330f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 331f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3321da177e4SLinus Torvalds 33372cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 3341da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 335e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3361da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 3378f029de2SDavid S. Miller int (*reject)(struct xfrm_state *, struct sk_buff *, 3388f029de2SDavid S. Miller const struct flowi *); 339aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3401da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 341c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3421da177e4SLinus Torvalds }; 3431da177e4SLinus Torvalds 344533cb5b0SEric Dumazet extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 345533cb5b0SEric Dumazet extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 3461da177e4SLinus Torvalds 347b59f45d0SHerbert Xu struct xfrm_mode { 348227620e2SHerbert Xu /* 349227620e2SHerbert Xu * Remove encapsulation header. 350227620e2SHerbert Xu * 351227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 352227620e2SHerbert Xu * header. 353227620e2SHerbert Xu * 354227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 355227620e2SHerbert Xu * should be and the network header shall be set to where the IP 356227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 357227620e2SHerbert Xu * payload. 358227620e2SHerbert Xu */ 359227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 360227620e2SHerbert Xu 361227620e2SHerbert Xu /* 362227620e2SHerbert Xu * This is the actual input entry point. 363227620e2SHerbert Xu * 364227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 365227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 366227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 367227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 368227620e2SHerbert Xu */ 369b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 37037fedd3aSHerbert Xu 37137fedd3aSHerbert Xu /* 37237fedd3aSHerbert Xu * Add encapsulation header. 37337fedd3aSHerbert Xu * 37437fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 37537fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 37637fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 37737fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 37837fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 37937fedd3aSHerbert Xu * header. The value of the network header will always point 38037fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 38137fedd3aSHerbert Xu */ 38236cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 38336cf9acfSHerbert Xu 38436cf9acfSHerbert Xu /* 38536cf9acfSHerbert Xu * This is the actual output entry point. 38636cf9acfSHerbert Xu * 38736cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 38836cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 38936cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 39036cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 39136cf9acfSHerbert Xu * call output2. 39236cf9acfSHerbert Xu */ 393eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 394b59f45d0SHerbert Xu 39517c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 396b59f45d0SHerbert Xu struct module *owner; 397b59f45d0SHerbert Xu unsigned int encap; 3981bfcb10fSHerbert Xu int flags; 3991bfcb10fSHerbert Xu }; 4001bfcb10fSHerbert Xu 4011bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 4021bfcb10fSHerbert Xu enum { 4031bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 404b59f45d0SHerbert Xu }; 405b59f45d0SHerbert Xu 406b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 407b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 408b59f45d0SHerbert Xu 409df9dcb45SKazunori MIYAZAWA static inline int xfrm_af2proto(unsigned int family) 410df9dcb45SKazunori MIYAZAWA { 411df9dcb45SKazunori MIYAZAWA switch(family) { 412df9dcb45SKazunori MIYAZAWA case AF_INET: 413df9dcb45SKazunori MIYAZAWA return IPPROTO_IPIP; 414df9dcb45SKazunori MIYAZAWA case AF_INET6: 415df9dcb45SKazunori MIYAZAWA return IPPROTO_IPV6; 416df9dcb45SKazunori MIYAZAWA default: 417df9dcb45SKazunori MIYAZAWA return 0; 418df9dcb45SKazunori MIYAZAWA } 419df9dcb45SKazunori MIYAZAWA } 420df9dcb45SKazunori MIYAZAWA 421df9dcb45SKazunori MIYAZAWA static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) 422df9dcb45SKazunori MIYAZAWA { 423df9dcb45SKazunori MIYAZAWA if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || 424df9dcb45SKazunori MIYAZAWA (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) 425df9dcb45SKazunori MIYAZAWA return x->inner_mode; 426df9dcb45SKazunori MIYAZAWA else 427df9dcb45SKazunori MIYAZAWA return x->inner_mode_iaf; 428df9dcb45SKazunori MIYAZAWA } 429df9dcb45SKazunori MIYAZAWA 430fd2c3ef7SEric Dumazet struct xfrm_tmpl { 4311da177e4SLinus Torvalds /* id in template is interpreted as: 4321da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 4331da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 4341da177e4SLinus Torvalds * daddr must be fixed too. 4351da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 4361da177e4SLinus Torvalds */ 4371da177e4SLinus Torvalds struct xfrm_id id; 4381da177e4SLinus Torvalds 4391da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 4401da177e4SLinus Torvalds xfrm_address_t saddr; 4411da177e4SLinus Torvalds 44276b3f055SMiika Komu unsigned short encap_family; 44376b3f055SMiika Komu 444a6337463Sjamal u32 reqid; 4451da177e4SLinus Torvalds 4467e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 447a6337463Sjamal u8 mode; 4481da177e4SLinus Torvalds 4491da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 450a6337463Sjamal u8 share; 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 453a6337463Sjamal u8 optional; 4541da177e4SLinus Torvalds 455c5d18e98SHerbert Xu /* Skip aalgos/ealgos/calgos checks. */ 456a6337463Sjamal u8 allalgs; 457c5d18e98SHerbert Xu 4581da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 459a6337463Sjamal u32 aalgos; 460a6337463Sjamal u32 ealgos; 461a6337463Sjamal u32 calgos; 4621da177e4SLinus Torvalds }; 4631da177e4SLinus Torvalds 464622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 4651da177e4SLinus Torvalds 46612a169e7SHerbert Xu struct xfrm_policy_walk_entry { 46712a169e7SHerbert Xu struct list_head all; 46812a169e7SHerbert Xu u8 dead; 46912a169e7SHerbert Xu }; 47012a169e7SHerbert Xu 47112a169e7SHerbert Xu struct xfrm_policy_walk { 47212a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 47312a169e7SHerbert Xu u8 type; 47412a169e7SHerbert Xu u32 seq; 47512a169e7SHerbert Xu }; 47612a169e7SHerbert Xu 477fd2c3ef7SEric Dumazet struct xfrm_policy { 4780331b1f3SAlexey Dobriyan #ifdef CONFIG_NET_NS 4790331b1f3SAlexey Dobriyan struct net *xp_net; 4800331b1f3SAlexey Dobriyan #endif 4812518c7c2SDavid S. Miller struct hlist_node bydst; 4822518c7c2SDavid S. Miller struct hlist_node byidx; 4831da177e4SLinus Torvalds 4841da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 4851da177e4SLinus Torvalds rwlock_t lock; 4861da177e4SLinus Torvalds atomic_t refcnt; 4871da177e4SLinus Torvalds struct timer_list timer; 4881da177e4SLinus Torvalds 489fe1a5f03STimo Teräs struct flow_cache_object flo; 49080c802f3STimo Teräs atomic_t genid; 4911da177e4SLinus Torvalds u32 priority; 4921da177e4SLinus Torvalds u32 index; 493bf825f81SJamal Hadi Salim struct xfrm_mark mark; 4941da177e4SLinus Torvalds struct xfrm_selector selector; 4951da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 4961da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 49712a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 49846ca5f5dSArnaldo Carvalho de Melo u8 type; 49946ca5f5dSArnaldo Carvalho de Melo u8 action; 50046ca5f5dSArnaldo Carvalho de Melo u8 flags; 50146ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 50212a169e7SHerbert Xu u16 family; 503df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 5041da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 5051da177e4SLinus Torvalds }; 5061da177e4SLinus Torvalds 5070331b1f3SAlexey Dobriyan static inline struct net *xp_net(struct xfrm_policy *xp) 5080331b1f3SAlexey Dobriyan { 5090331b1f3SAlexey Dobriyan return read_pnet(&xp->xp_net); 5100331b1f3SAlexey Dobriyan } 5110331b1f3SAlexey Dobriyan 51213c1d189SArnaud Ebalard struct xfrm_kmaddress { 51313c1d189SArnaud Ebalard xfrm_address_t local; 51413c1d189SArnaud Ebalard xfrm_address_t remote; 51513c1d189SArnaud Ebalard u32 reserved; 51613c1d189SArnaud Ebalard u16 family; 51713c1d189SArnaud Ebalard }; 51813c1d189SArnaud Ebalard 51980c9abaaSShinta Sugimoto struct xfrm_migrate { 52080c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 52180c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 52280c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 52380c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 52480c9abaaSShinta Sugimoto u8 proto; 52580c9abaaSShinta Sugimoto u8 mode; 52680c9abaaSShinta Sugimoto u16 reserved; 52780c9abaaSShinta Sugimoto u32 reqid; 52880c9abaaSShinta Sugimoto u16 old_family; 52980c9abaaSShinta Sugimoto u16 new_family; 53080c9abaaSShinta Sugimoto }; 53180c9abaaSShinta Sugimoto 5321da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 533f8cd5488SJamal Hadi Salim /* which seqno */ 534f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 535f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 536f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 537f8cd5488SJamal Hadi Salim /* what happened */ 538f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 539f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 540f8cd5488SJamal Hadi Salim 541f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 542f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 543f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 544f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 545f8cd5488SJamal Hadi Salim /* default seq threshold size */ 546f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 5471da177e4SLinus Torvalds 548fd2c3ef7SEric Dumazet struct xfrm_mgr { 5491da177e4SLinus Torvalds struct list_head list; 5501da177e4SLinus Torvalds char *id; 55126b15dadSJamal Hadi Salim int (*notify)(struct xfrm_state *x, struct km_event *c); 5521da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 553cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 5545d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 55526b15dadSJamal Hadi Salim int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); 556db983c11SAlexey Dobriyan int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 55713c1d189SArnaud Ebalard int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles, struct xfrm_kmaddress *k); 5581da177e4SLinus Torvalds }; 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 5611da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 5621da177e4SLinus Torvalds 563436a0a40SHerbert Xu /* 564436a0a40SHerbert Xu * This structure is used for the duration where packets are being 565436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 566436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 567436a0a40SHerbert Xu */ 568436a0a40SHerbert Xu struct xfrm_skb_cb { 569436a0a40SHerbert Xu union { 570436a0a40SHerbert Xu struct inet_skb_parm h4; 571436a0a40SHerbert Xu struct inet6_skb_parm h6; 572436a0a40SHerbert Xu } header; 573436a0a40SHerbert Xu 574436a0a40SHerbert Xu /* Sequence number for replay protection. */ 575b318e0e4SHerbert Xu union { 576b318e0e4SHerbert Xu u64 output; 577b318e0e4SHerbert Xu __be32 input; 578b318e0e4SHerbert Xu } seq; 579436a0a40SHerbert Xu }; 580436a0a40SHerbert Xu 581436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 582436a0a40SHerbert Xu 58336cf9acfSHerbert Xu /* 58436cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 58536cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 58636cf9acfSHerbert Xu */ 58736cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 58836cf9acfSHerbert Xu union { 58936cf9acfSHerbert Xu struct inet_skb_parm h4; 59036cf9acfSHerbert Xu struct inet6_skb_parm h6; 59136cf9acfSHerbert Xu } header; 59236cf9acfSHerbert Xu 59336cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 59436cf9acfSHerbert Xu __be16 id; 59536cf9acfSHerbert Xu __be16 frag_off; 59636cf9acfSHerbert Xu 597732c8bd5SHerbert Xu /* IP header length (excluding options or extension headers). */ 598732c8bd5SHerbert Xu u8 ihl; 599732c8bd5SHerbert Xu 60036cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 60136cf9acfSHerbert Xu u8 tos; 60236cf9acfSHerbert Xu 60336cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 60436cf9acfSHerbert Xu u8 ttl; 60536cf9acfSHerbert Xu 60636cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 60736cf9acfSHerbert Xu u8 protocol; 60836cf9acfSHerbert Xu 609732c8bd5SHerbert Xu /* Option length for IPv4, zero for IPv6. */ 610732c8bd5SHerbert Xu u8 optlen; 611732c8bd5SHerbert Xu 61236cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 61336cf9acfSHerbert Xu u8 flow_lbl[3]; 61436cf9acfSHerbert Xu }; 61536cf9acfSHerbert Xu 61636cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 61736cf9acfSHerbert Xu 618716062fdSHerbert Xu /* 619716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 620716062fdSHerbert Xu * related information. 621716062fdSHerbert Xu */ 622716062fdSHerbert Xu struct xfrm_spi_skb_cb { 623716062fdSHerbert Xu union { 624716062fdSHerbert Xu struct inet_skb_parm h4; 625716062fdSHerbert Xu struct inet6_skb_parm h6; 626716062fdSHerbert Xu } header; 627716062fdSHerbert Xu 628716062fdSHerbert Xu unsigned int daddroff; 6292fcb45b6SHerbert Xu unsigned int family; 630716062fdSHerbert Xu }; 631716062fdSHerbert Xu 632716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 633716062fdSHerbert Xu 634161a09e7SJoy Latten /* Audit Information */ 635fd2c3ef7SEric Dumazet struct xfrm_audit { 636161a09e7SJoy Latten u32 secid; 6372532386fSEric Paris uid_t loginuid; 6382532386fSEric Paris u32 sessionid; 639161a09e7SJoy Latten }; 640c9204d9cSJoy Latten 641c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 642afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 643ab5f5e8bSJoy Latten { 644ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 645ab5f5e8bSJoy Latten 646afeb14b4SPaul Moore if (audit_enabled == 0) 647afeb14b4SPaul Moore return NULL; 648ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 649ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 650ab5f5e8bSJoy Latten if (audit_buf == NULL) 651ab5f5e8bSJoy Latten return NULL; 652afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 653afeb14b4SPaul Moore return audit_buf; 654afeb14b4SPaul Moore } 655afeb14b4SPaul Moore 6562532386fSEric Paris static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid, 657afeb14b4SPaul Moore struct audit_buffer *audit_buf) 658afeb14b4SPaul Moore { 659afeb14b4SPaul Moore char *secctx; 660afeb14b4SPaul Moore u32 secctx_len; 661ab5f5e8bSJoy Latten 6622532386fSEric Paris audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); 66368277accSPaul Moore if (secid != 0 && 66468277accSPaul Moore security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { 665ab5f5e8bSJoy Latten audit_log_format(audit_buf, " subj=%s", secctx); 666ab5f5e8bSJoy Latten security_release_secctx(secctx, secctx_len); 667ab5f5e8bSJoy Latten } else 668ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 669ab5f5e8bSJoy Latten } 670ab5f5e8bSJoy Latten 671ab5f5e8bSJoy Latten extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 6722532386fSEric Paris u32 auid, u32 ses, u32 secid); 673ab5f5e8bSJoy Latten extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 6742532386fSEric Paris u32 auid, u32 ses, u32 secid); 675ab5f5e8bSJoy Latten extern void xfrm_audit_state_add(struct xfrm_state *x, int result, 6762532386fSEric Paris u32 auid, u32 ses, u32 secid); 677ab5f5e8bSJoy Latten extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, 6782532386fSEric Paris u32 auid, u32 ses, u32 secid); 679afeb14b4SPaul Moore extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 680afeb14b4SPaul Moore struct sk_buff *skb); 681afeb14b4SPaul Moore extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 682afeb14b4SPaul Moore extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 683afeb14b4SPaul Moore __be32 net_spi, __be32 net_seq); 684afeb14b4SPaul Moore extern void xfrm_audit_state_icvfail(struct xfrm_state *x, 685afeb14b4SPaul Moore struct sk_buff *skb, u8 proto); 686c9204d9cSJoy Latten #else 68741fef0eeSMarcin Slusarz 68841fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 68941fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 69041fef0eeSMarcin Slusarz { 69141fef0eeSMarcin Slusarz } 69241fef0eeSMarcin Slusarz 69341fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 69441fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 69541fef0eeSMarcin Slusarz { 69641fef0eeSMarcin Slusarz } 69741fef0eeSMarcin Slusarz 69841fef0eeSMarcin Slusarz static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, 69941fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 70041fef0eeSMarcin Slusarz { 70141fef0eeSMarcin Slusarz } 70241fef0eeSMarcin Slusarz 70341fef0eeSMarcin Slusarz static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, 70441fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 70541fef0eeSMarcin Slusarz { 70641fef0eeSMarcin Slusarz } 70741fef0eeSMarcin Slusarz 70841fef0eeSMarcin Slusarz static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 70941fef0eeSMarcin Slusarz struct sk_buff *skb) 71041fef0eeSMarcin Slusarz { 71141fef0eeSMarcin Slusarz } 71241fef0eeSMarcin Slusarz 71341fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, 71441fef0eeSMarcin Slusarz u16 family) 71541fef0eeSMarcin Slusarz { 71641fef0eeSMarcin Slusarz } 71741fef0eeSMarcin Slusarz 71841fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 71941fef0eeSMarcin Slusarz __be32 net_spi, __be32 net_seq) 72041fef0eeSMarcin Slusarz { 72141fef0eeSMarcin Slusarz } 72241fef0eeSMarcin Slusarz 72341fef0eeSMarcin Slusarz static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, 72441fef0eeSMarcin Slusarz struct sk_buff *skb, u8 proto) 72541fef0eeSMarcin Slusarz { 72641fef0eeSMarcin Slusarz } 727c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 728161a09e7SJoy Latten 7291da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 7301da177e4SLinus Torvalds { 7311da177e4SLinus Torvalds if (likely(policy != NULL)) 7321da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 7331da177e4SLinus Torvalds } 7341da177e4SLinus Torvalds 73564c31b3fSWANG Cong extern void xfrm_policy_destroy(struct xfrm_policy *policy); 7361da177e4SLinus Torvalds 7371da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 7381da177e4SLinus Torvalds { 7391da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 74064c31b3fSWANG Cong xfrm_policy_destroy(policy); 7411da177e4SLinus Torvalds } 7421da177e4SLinus Torvalds 7434e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7444e81bb83SMasahide NAKAMURA { 7454e81bb83SMasahide NAKAMURA int i; 7464e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 7474e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 7484e81bb83SMasahide NAKAMURA } 7494e81bb83SMasahide NAKAMURA 7501da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 7511da177e4SLinus Torvalds 75221380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 75321380b81SHerbert Xu { 75421380b81SHerbert Xu atomic_dec(&x->refcnt); 75521380b81SHerbert Xu } 75621380b81SHerbert Xu 7571da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 7581da177e4SLinus Torvalds { 7591da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 7601da177e4SLinus Torvalds __xfrm_state_destroy(x); 7611da177e4SLinus Torvalds } 7621da177e4SLinus Torvalds 7631da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 7641da177e4SLinus Torvalds { 7651da177e4SLinus Torvalds atomic_inc(&x->refcnt); 7661da177e4SLinus Torvalds } 7671da177e4SLinus Torvalds 7681da177e4SLinus Torvalds static __inline__ int addr_match(void *token1, void *token2, int prefixlen) 7691da177e4SLinus Torvalds { 7705f19343fSAl Viro __be32 *a1 = token1; 7715f19343fSAl Viro __be32 *a2 = token2; 7721da177e4SLinus Torvalds int pdw; 7731da177e4SLinus Torvalds int pbi; 7741da177e4SLinus Torvalds 775a6337463Sjamal pdw = prefixlen >> 5; /* num of whole u32 in prefix */ 7761da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 7771da177e4SLinus Torvalds 7781da177e4SLinus Torvalds if (pdw) 7791da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 7801da177e4SLinus Torvalds return 0; 7811da177e4SLinus Torvalds 7821da177e4SLinus Torvalds if (pbi) { 7835f19343fSAl Viro __be32 mask; 7841da177e4SLinus Torvalds 7851da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 7861da177e4SLinus Torvalds 7871da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 7881da177e4SLinus Torvalds return 0; 7891da177e4SLinus Torvalds } 7901da177e4SLinus Torvalds 7911da177e4SLinus Torvalds return 1; 7921da177e4SLinus Torvalds } 7931da177e4SLinus Torvalds 7941da177e4SLinus Torvalds static __inline__ 795e8a4e377SDavid S. Miller __be16 xfrm_flowi_sport(const struct flowi *fl) 7961da177e4SLinus Torvalds { 797f9d07e41SAl Viro __be16 port; 7981da177e4SLinus Torvalds switch(fl->proto) { 7991da177e4SLinus Torvalds case IPPROTO_TCP: 8001da177e4SLinus Torvalds case IPPROTO_UDP: 801ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8021da177e4SLinus Torvalds case IPPROTO_SCTP: 8031da177e4SLinus Torvalds port = fl->fl_ip_sport; 8041da177e4SLinus Torvalds break; 8051da177e4SLinus Torvalds case IPPROTO_ICMP: 8061da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8071da177e4SLinus Torvalds port = htons(fl->fl_icmp_type); 8081da177e4SLinus Torvalds break; 8092ce4272aSMasahide NAKAMURA case IPPROTO_MH: 8102ce4272aSMasahide NAKAMURA port = htons(fl->fl_mh_type); 8112ce4272aSMasahide NAKAMURA break; 812cc9ff19dSTimo Teräs case IPPROTO_GRE: 813aa285b17STimo Teräs port = htons(ntohl(fl->fl_gre_key) >> 16); 814cc9ff19dSTimo Teräs break; 8151da177e4SLinus Torvalds default: 8161da177e4SLinus Torvalds port = 0; /*XXX*/ 8171da177e4SLinus Torvalds } 8181da177e4SLinus Torvalds return port; 8191da177e4SLinus Torvalds } 8201da177e4SLinus Torvalds 8211da177e4SLinus Torvalds static __inline__ 822e8a4e377SDavid S. Miller __be16 xfrm_flowi_dport(const struct flowi *fl) 8231da177e4SLinus Torvalds { 824f9d07e41SAl Viro __be16 port; 8251da177e4SLinus Torvalds switch(fl->proto) { 8261da177e4SLinus Torvalds case IPPROTO_TCP: 8271da177e4SLinus Torvalds case IPPROTO_UDP: 828ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8291da177e4SLinus Torvalds case IPPROTO_SCTP: 8301da177e4SLinus Torvalds port = fl->fl_ip_dport; 8311da177e4SLinus Torvalds break; 8321da177e4SLinus Torvalds case IPPROTO_ICMP: 8331da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8341da177e4SLinus Torvalds port = htons(fl->fl_icmp_code); 8351da177e4SLinus Torvalds break; 836cc9ff19dSTimo Teräs case IPPROTO_GRE: 837aa285b17STimo Teräs port = htons(ntohl(fl->fl_gre_key) & 0xffff); 838cc9ff19dSTimo Teräs break; 8391da177e4SLinus Torvalds default: 8401da177e4SLinus Torvalds port = 0; /*XXX*/ 8411da177e4SLinus Torvalds } 8421da177e4SLinus Torvalds return port; 8431da177e4SLinus Torvalds } 8441da177e4SLinus Torvalds 84577681021SAndrew Morton extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, 84677681021SAndrew Morton unsigned short family); 8471da177e4SLinus Torvalds 848df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 849df71837dSTrent Jaeger /* If neither has a context --> match 850df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 851df71837dSTrent Jaeger */ 852df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 853df71837dSTrent Jaeger { 854df71837dSTrent Jaeger return ((!s1 && !s2) || 855df71837dSTrent Jaeger (s1 && s2 && 856df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 857df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 858df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 859df71837dSTrent Jaeger } 860df71837dSTrent Jaeger #else 861df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 862df71837dSTrent Jaeger { 863df71837dSTrent Jaeger return 1; 864df71837dSTrent Jaeger } 865df71837dSTrent Jaeger #endif 866df71837dSTrent Jaeger 8671da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 8681da177e4SLinus Torvalds * 8691da177e4SLinus Torvalds * dst->child points to the next element of bundle. 8701da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 8711da177e4SLinus Torvalds * 8721da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 8731da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 8741da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 8751da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 8761da177e4SLinus Torvalds * policy rule. 8771da177e4SLinus Torvalds */ 878fd2c3ef7SEric Dumazet struct xfrm_dst { 8791da177e4SLinus Torvalds union { 8801da177e4SLinus Torvalds struct dst_entry dst; 8811da177e4SLinus Torvalds struct rtable rt; 8821da177e4SLinus Torvalds struct rt6_info rt6; 8831da177e4SLinus Torvalds } u; 8841da177e4SLinus Torvalds struct dst_entry *route; 88580c802f3STimo Teräs struct flow_cache_object flo; 88680c802f3STimo Teräs struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; 88780c802f3STimo Teräs int num_pols, num_xfrms; 888157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 889157bfc25SMasahide NAKAMURA struct flowi *origin; 890157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 891157bfc25SMasahide NAKAMURA #endif 89280c802f3STimo Teräs u32 xfrm_genid; 89380c802f3STimo Teräs u32 policy_genid; 8941da177e4SLinus Torvalds u32 route_mtu_cached; 8951da177e4SLinus Torvalds u32 child_mtu_cached; 89692d63decSHideaki YOSHIFUJI u32 route_cookie; 89792d63decSHideaki YOSHIFUJI u32 path_cookie; 8981da177e4SLinus Torvalds }; 8991da177e4SLinus Torvalds 900def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 901aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 902aabc9761SHerbert Xu { 90380c802f3STimo Teräs xfrm_pols_put(xdst->pols, xdst->num_pols); 904aabc9761SHerbert Xu dst_release(xdst->route); 905aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 906aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 907157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 908157bfc25SMasahide NAKAMURA kfree(xdst->origin); 909157bfc25SMasahide NAKAMURA xdst->origin = NULL; 910157bfc25SMasahide NAKAMURA kfree(xdst->partner); 911157bfc25SMasahide NAKAMURA xdst->partner = NULL; 912157bfc25SMasahide NAKAMURA #endif 913aabc9761SHerbert Xu } 914def8b4faSAlexey Dobriyan #endif 915aabc9761SHerbert Xu 916aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 917aabc9761SHerbert Xu 918fd2c3ef7SEric Dumazet struct sec_path { 9191da177e4SLinus Torvalds atomic_t refcnt; 9201da177e4SLinus Torvalds int len; 921dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 9221da177e4SLinus Torvalds }; 9231da177e4SLinus Torvalds 9241da177e4SLinus Torvalds static inline struct sec_path * 9251da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 9261da177e4SLinus Torvalds { 9271da177e4SLinus Torvalds if (sp) 9281da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 9291da177e4SLinus Torvalds return sp; 9301da177e4SLinus Torvalds } 9311da177e4SLinus Torvalds 9321da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 9331da177e4SLinus Torvalds 9341da177e4SLinus Torvalds static inline void 9351da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 9361da177e4SLinus Torvalds { 9371da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 9381da177e4SLinus Torvalds __secpath_destroy(sp); 9391da177e4SLinus Torvalds } 9401da177e4SLinus Torvalds 9411da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 9421da177e4SLinus Torvalds 9431da177e4SLinus Torvalds static inline void 9441da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 9451da177e4SLinus Torvalds { 9461da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9471da177e4SLinus Torvalds secpath_put(skb->sp); 9481da177e4SLinus Torvalds skb->sp = NULL; 9491da177e4SLinus Torvalds #endif 9501da177e4SLinus Torvalds } 9511da177e4SLinus Torvalds 9521da177e4SLinus Torvalds static inline int 953a1e59abfSPatrick McHardy xfrm_addr_any(xfrm_address_t *addr, unsigned short family) 954a1e59abfSPatrick McHardy { 955a1e59abfSPatrick McHardy switch (family) { 956a1e59abfSPatrick McHardy case AF_INET: 957a1e59abfSPatrick McHardy return addr->a4 == 0; 958a1e59abfSPatrick McHardy case AF_INET6: 959a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 960a1e59abfSPatrick McHardy } 961a1e59abfSPatrick McHardy return 0; 962a1e59abfSPatrick McHardy } 963a1e59abfSPatrick McHardy 964a1e59abfSPatrick McHardy static inline int 9651da177e4SLinus Torvalds __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 9661da177e4SLinus Torvalds { 9671da177e4SLinus Torvalds return (tmpl->saddr.a4 && 9681da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 9691da177e4SLinus Torvalds } 9701da177e4SLinus Torvalds 9711da177e4SLinus Torvalds static inline int 9721da177e4SLinus Torvalds __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 9731da177e4SLinus Torvalds { 9741da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 9751da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 9761da177e4SLinus Torvalds } 9771da177e4SLinus Torvalds 9781da177e4SLinus Torvalds static inline int 9791da177e4SLinus Torvalds xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) 9801da177e4SLinus Torvalds { 9811da177e4SLinus Torvalds switch (family) { 9821da177e4SLinus Torvalds case AF_INET: 9831da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 9841da177e4SLinus Torvalds case AF_INET6: 9851da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 9861da177e4SLinus Torvalds } 9871da177e4SLinus Torvalds return !0; 9881da177e4SLinus Torvalds } 9891da177e4SLinus Torvalds 9901da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9911da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 9921da177e4SLinus Torvalds 993d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 994d5422efeSHerbert Xu struct sk_buff *skb, 995d5422efeSHerbert Xu unsigned int family, int reverse) 9961da177e4SLinus Torvalds { 997f6e1e25dSAlexey Dobriyan struct net *net = dev_net(skb->dev); 998d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 999d5422efeSHerbert Xu 10001da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 1001d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 10021da177e4SLinus Torvalds 1003f6e1e25dSAlexey Dobriyan return (!net->xfrm.policy_count[dir] && !skb->sp) || 1004adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOPOLICY) || 1005d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 1006d5422efeSHerbert Xu } 1007d5422efeSHerbert Xu 1008d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 1009d5422efeSHerbert Xu { 1010d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 10111da177e4SLinus Torvalds } 10121da177e4SLinus Torvalds 10131da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10141da177e4SLinus Torvalds { 10151da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 10161da177e4SLinus Torvalds } 10171da177e4SLinus Torvalds 10181da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10191da177e4SLinus Torvalds { 10201da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 10211da177e4SLinus Torvalds } 10221da177e4SLinus Torvalds 1023d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1024d5422efeSHerbert Xu struct sk_buff *skb) 1025d5422efeSHerbert Xu { 1026d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 1027d5422efeSHerbert Xu } 1028d5422efeSHerbert Xu 1029d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1030d5422efeSHerbert Xu struct sk_buff *skb) 1031d5422efeSHerbert Xu { 1032d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 1033d5422efeSHerbert Xu } 1034d5422efeSHerbert Xu 1035d5422efeSHerbert Xu extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1036d5422efeSHerbert Xu unsigned int family, int reverse); 1037d5422efeSHerbert Xu 1038d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1039d5422efeSHerbert Xu unsigned int family) 1040d5422efeSHerbert Xu { 1041d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 1042d5422efeSHerbert Xu } 1043d5422efeSHerbert Xu 1044d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1045d5422efeSHerbert Xu struct flowi *fl, 1046d5422efeSHerbert Xu unsigned int family) 1047d5422efeSHerbert Xu { 1048d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 1049d5422efeSHerbert Xu } 1050d5422efeSHerbert Xu 10511da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 10521da177e4SLinus Torvalds 10531da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 10541da177e4SLinus Torvalds { 105599a66657SAlexey Dobriyan struct net *net = dev_net(skb->dev); 105699a66657SAlexey Dobriyan 105799a66657SAlexey Dobriyan return !net->xfrm.policy_count[XFRM_POLICY_OUT] || 1058adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOXFRM) || 10591da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 10601da177e4SLinus Torvalds } 10611da177e4SLinus Torvalds 10621da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 10631da177e4SLinus Torvalds { 10641da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 10651da177e4SLinus Torvalds } 10661da177e4SLinus Torvalds 10671da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 10681da177e4SLinus Torvalds { 10691da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 10701da177e4SLinus Torvalds } 10711da177e4SLinus Torvalds 10721da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 10731da177e4SLinus Torvalds 10741da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 10751da177e4SLinus Torvalds { 10761da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 10771da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 10781da177e4SLinus Torvalds return 0; 10791da177e4SLinus Torvalds } 10801da177e4SLinus Torvalds 10814666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 10821da177e4SLinus Torvalds 10831da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 10841da177e4SLinus Torvalds { 10851da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 10861da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 10871da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 10881da177e4SLinus Torvalds } 10891da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 10901da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 10911da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 10921da177e4SLinus Torvalds } 10931da177e4SLinus Torvalds } 10941da177e4SLinus Torvalds 10951da177e4SLinus Torvalds #else 10961da177e4SLinus Torvalds 10971da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 10981da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 10991da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 11001da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 11011da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11021da177e4SLinus Torvalds { 11031da177e4SLinus Torvalds return 1; 11041da177e4SLinus Torvalds } 11051da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11061da177e4SLinus Torvalds { 11071da177e4SLinus Torvalds return 1; 11081da177e4SLinus Torvalds } 11091da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 11101da177e4SLinus Torvalds { 11111da177e4SLinus Torvalds return 1; 11121da177e4SLinus Torvalds } 1113d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1114d5422efeSHerbert Xu struct flowi *fl, 1115d5422efeSHerbert Xu unsigned int family) 1116d5422efeSHerbert Xu { 1117d5422efeSHerbert Xu return -ENOSYS; 1118d5422efeSHerbert Xu } 1119d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1120d5422efeSHerbert Xu struct sk_buff *skb) 1121d5422efeSHerbert Xu { 1122d5422efeSHerbert Xu return 1; 1123d5422efeSHerbert Xu } 1124d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1125d5422efeSHerbert Xu struct sk_buff *skb) 1126d5422efeSHerbert Xu { 1127d5422efeSHerbert Xu return 1; 1128d5422efeSHerbert Xu } 11291da177e4SLinus Torvalds #endif 11301da177e4SLinus Torvalds 11311da177e4SLinus Torvalds static __inline__ 1132e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) 11331da177e4SLinus Torvalds { 11341da177e4SLinus Torvalds switch (family){ 11351da177e4SLinus Torvalds case AF_INET: 11361da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_dst; 11371da177e4SLinus Torvalds case AF_INET6: 11381da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_dst; 11391da177e4SLinus Torvalds } 11401da177e4SLinus Torvalds return NULL; 11411da177e4SLinus Torvalds } 11421da177e4SLinus Torvalds 11431da177e4SLinus Torvalds static __inline__ 1144e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) 11451da177e4SLinus Torvalds { 11461da177e4SLinus Torvalds switch (family){ 11471da177e4SLinus Torvalds case AF_INET: 11481da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_src; 11491da177e4SLinus Torvalds case AF_INET6: 11501da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_src; 11511da177e4SLinus Torvalds } 11521da177e4SLinus Torvalds return NULL; 11531da177e4SLinus Torvalds } 11541da177e4SLinus Torvalds 11559bb182a7SYOSHIFUJI Hideaki static __inline__ 1156e8a4e377SDavid S. Miller void xfrm_flowi_addr_get(const struct flowi *fl, 11579bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 11589bb182a7SYOSHIFUJI Hideaki unsigned short family) 11599bb182a7SYOSHIFUJI Hideaki { 11609bb182a7SYOSHIFUJI Hideaki switch(family) { 11619bb182a7SYOSHIFUJI Hideaki case AF_INET: 11629bb182a7SYOSHIFUJI Hideaki memcpy(&saddr->a4, &fl->fl4_src, sizeof(saddr->a4)); 11639bb182a7SYOSHIFUJI Hideaki memcpy(&daddr->a4, &fl->fl4_dst, sizeof(daddr->a4)); 11649bb182a7SYOSHIFUJI Hideaki break; 11659bb182a7SYOSHIFUJI Hideaki case AF_INET6: 11669bb182a7SYOSHIFUJI Hideaki ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->fl6_src); 11679bb182a7SYOSHIFUJI Hideaki ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->fl6_dst); 11689bb182a7SYOSHIFUJI Hideaki break; 11699bb182a7SYOSHIFUJI Hideaki } 11709bb182a7SYOSHIFUJI Hideaki } 11719bb182a7SYOSHIFUJI Hideaki 11721da177e4SLinus Torvalds static __inline__ int 11731da177e4SLinus Torvalds __xfrm4_state_addr_check(struct xfrm_state *x, 11741da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 11751da177e4SLinus Torvalds { 11761da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 11771da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 11781da177e4SLinus Torvalds return 1; 11791da177e4SLinus Torvalds return 0; 11801da177e4SLinus Torvalds } 11811da177e4SLinus Torvalds 11821da177e4SLinus Torvalds static __inline__ int 11831da177e4SLinus Torvalds __xfrm6_state_addr_check(struct xfrm_state *x, 11841da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 11851da177e4SLinus Torvalds { 11861da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 11871da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 11881da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 11891da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 11901da177e4SLinus Torvalds return 1; 11911da177e4SLinus Torvalds return 0; 11921da177e4SLinus Torvalds } 11931da177e4SLinus Torvalds 11941da177e4SLinus Torvalds static __inline__ int 11951da177e4SLinus Torvalds xfrm_state_addr_check(struct xfrm_state *x, 11961da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 11971da177e4SLinus Torvalds unsigned short family) 11981da177e4SLinus Torvalds { 11991da177e4SLinus Torvalds switch (family) { 12001da177e4SLinus Torvalds case AF_INET: 12011da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 12021da177e4SLinus Torvalds case AF_INET6: 12031da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 12041da177e4SLinus Torvalds } 12051da177e4SLinus Torvalds return 0; 12061da177e4SLinus Torvalds } 12071da177e4SLinus Torvalds 1208e53820deSMasahide NAKAMURA static __inline__ int 1209e8a4e377SDavid S. Miller xfrm_state_addr_flow_check(struct xfrm_state *x, const struct flowi *fl, 1210e53820deSMasahide NAKAMURA unsigned short family) 1211e53820deSMasahide NAKAMURA { 1212e53820deSMasahide NAKAMURA switch (family) { 1213e53820deSMasahide NAKAMURA case AF_INET: 1214e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 1215e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_dst, 1216e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_src); 1217e53820deSMasahide NAKAMURA case AF_INET6: 1218e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 1219e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_dst, 1220e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_src); 1221e53820deSMasahide NAKAMURA } 1222e53820deSMasahide NAKAMURA return 0; 1223e53820deSMasahide NAKAMURA } 1224e53820deSMasahide NAKAMURA 12251da177e4SLinus Torvalds static inline int xfrm_state_kern(struct xfrm_state *x) 12261da177e4SLinus Torvalds { 12271da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 12281da177e4SLinus Torvalds } 12291da177e4SLinus Torvalds 12305794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 12315794708fSMasahide NAKAMURA { 1232dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1233dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1234dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1235dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 12365794708fSMasahide NAKAMURA } 12375794708fSMasahide NAKAMURA 12381da177e4SLinus Torvalds /* 12391da177e4SLinus Torvalds * xfrm algorithm information 12401da177e4SLinus Torvalds */ 12411a6509d9SHerbert Xu struct xfrm_algo_aead_info { 12421a6509d9SHerbert Xu u16 icv_truncbits; 12431a6509d9SHerbert Xu }; 12441a6509d9SHerbert Xu 12451da177e4SLinus Torvalds struct xfrm_algo_auth_info { 12461da177e4SLinus Torvalds u16 icv_truncbits; 12471da177e4SLinus Torvalds u16 icv_fullbits; 12481da177e4SLinus Torvalds }; 12491da177e4SLinus Torvalds 12501da177e4SLinus Torvalds struct xfrm_algo_encr_info { 12511da177e4SLinus Torvalds u16 blockbits; 12521da177e4SLinus Torvalds u16 defkeybits; 12531da177e4SLinus Torvalds }; 12541da177e4SLinus Torvalds 12551da177e4SLinus Torvalds struct xfrm_algo_comp_info { 12561da177e4SLinus Torvalds u16 threshold; 12571da177e4SLinus Torvalds }; 12581da177e4SLinus Torvalds 12591da177e4SLinus Torvalds struct xfrm_algo_desc { 12601da177e4SLinus Torvalds char *name; 126104ff1260SHerbert Xu char *compat; 12621da177e4SLinus Torvalds u8 available:1; 12631da177e4SLinus Torvalds union { 12641a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 12651da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 12661da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 12671da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 12681da177e4SLinus Torvalds } uinfo; 12691da177e4SLinus Torvalds struct sadb_alg desc; 12701da177e4SLinus Torvalds }; 12711da177e4SLinus Torvalds 12721da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 12731da177e4SLinus Torvalds struct xfrm_tunnel { 12741da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1275a6337463Sjamal int (*err_handler)(struct sk_buff *skb, u32 info); 1276d2acc347SHerbert Xu 1277b33eab08SEric Dumazet struct xfrm_tunnel __rcu *next; 1278d2acc347SHerbert Xu int priority; 12791da177e4SLinus Torvalds }; 12801da177e4SLinus Torvalds 12811da177e4SLinus Torvalds struct xfrm6_tunnel { 1282d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1283d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 1284d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info); 12856f0bcf15SEric Dumazet struct xfrm6_tunnel __rcu *next; 1286d2acc347SHerbert Xu int priority; 12871da177e4SLinus Torvalds }; 12881da177e4SLinus Torvalds 12891da177e4SLinus Torvalds extern void xfrm_init(void); 1290a33bc5c1SNeil Horman extern void xfrm4_init(int rt_hash_size); 1291d62ddc21SAlexey Dobriyan extern int xfrm_state_init(struct net *net); 1292d62ddc21SAlexey Dobriyan extern void xfrm_state_fini(struct net *net); 12931da177e4SLinus Torvalds extern void xfrm4_state_init(void); 1294c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1295c35b7e72SDaniel Lezcano extern int xfrm6_init(void); 1296c35b7e72SDaniel Lezcano extern void xfrm6_fini(void); 12970013cabaSDaniel Lezcano extern int xfrm6_state_init(void); 12981da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 1299c35b7e72SDaniel Lezcano #else 1300c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1301c35b7e72SDaniel Lezcano { 1302c35b7e72SDaniel Lezcano return 0; 1303c35b7e72SDaniel Lezcano } 1304c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1305c35b7e72SDaniel Lezcano { 1306c35b7e72SDaniel Lezcano ; 1307c35b7e72SDaniel Lezcano } 1308c35b7e72SDaniel Lezcano #endif 13091da177e4SLinus Torvalds 1310558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1311c68cd1a0SAlexey Dobriyan extern int xfrm_proc_init(struct net *net); 1312c68cd1a0SAlexey Dobriyan extern void xfrm_proc_fini(struct net *net); 1313558f82efSMasahide NAKAMURA #endif 1314558f82efSMasahide NAKAMURA 1315b27aeadbSAlexey Dobriyan extern int xfrm_sysctl_init(struct net *net); 1316b27aeadbSAlexey Dobriyan #ifdef CONFIG_SYSCTL 1317b27aeadbSAlexey Dobriyan extern void xfrm_sysctl_fini(struct net *net); 1318b27aeadbSAlexey Dobriyan #else 1319b27aeadbSAlexey Dobriyan static inline void xfrm_sysctl_fini(struct net *net) 1320b27aeadbSAlexey Dobriyan { 1321b27aeadbSAlexey Dobriyan } 1322b27aeadbSAlexey Dobriyan #endif 1323b27aeadbSAlexey Dobriyan 13245c182458SHerbert Xu extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); 1325284fa7daSAlexey Dobriyan extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 13264c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1327abb81c4fSHerbert Xu extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); 1328673c09beSAlexey Dobriyan extern struct xfrm_state *xfrm_state_alloc(struct net *net); 13291da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, 13301da177e4SLinus Torvalds struct flowi *fl, struct xfrm_tmpl *tmpl, 13311da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 13321da177e4SLinus Torvalds unsigned short family); 1333bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, 13345447c5e4SAlexey Dobriyan xfrm_address_t *daddr, 1335628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1336628529b6SJamal Hadi Salim unsigned short family, 1337628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 13381da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 13391da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 13401da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 13411da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1342bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, 1343bd55775cSJamal Hadi Salim xfrm_address_t *daddr, __be32 spi, 1344bd55775cSJamal Hadi Salim u8 proto, unsigned short family); 1345bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, 1346bd55775cSJamal Hadi Salim xfrm_address_t *daddr, 1347bd55775cSJamal Hadi Salim xfrm_address_t *saddr, 1348bd55775cSJamal Hadi Salim u8 proto, 1349bd55775cSJamal Hadi Salim unsigned short family); 135041a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 135141a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 135241a49cc3SMasahide NAKAMURA int n, unsigned short family); 135341a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 135441a49cc3SMasahide NAKAMURA int n, unsigned short family); 135541a49cc3SMasahide NAKAMURA #else 135641a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 135741a49cc3SMasahide NAKAMURA int n, unsigned short family) 135841a49cc3SMasahide NAKAMURA { 135941a49cc3SMasahide NAKAMURA return -ENOSYS; 136041a49cc3SMasahide NAKAMURA } 136141a49cc3SMasahide NAKAMURA 136241a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 136341a49cc3SMasahide NAKAMURA int n, unsigned short family) 136441a49cc3SMasahide NAKAMURA { 136541a49cc3SMasahide NAKAMURA return -ENOSYS; 136641a49cc3SMasahide NAKAMURA } 136741a49cc3SMasahide NAKAMURA #endif 1368af11e316SJamal Hadi Salim 1369af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1370af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1371af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1372af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1373af11e316SJamal Hadi Salim }; 1374af11e316SJamal Hadi Salim 13755a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 13765a6d3416SJamal Hadi Salim u32 incnt; 13775a6d3416SJamal Hadi Salim u32 outcnt; 13785a6d3416SJamal Hadi Salim u32 fwdcnt; 13795a6d3416SJamal Hadi Salim u32 inscnt; 13805a6d3416SJamal Hadi Salim u32 outscnt; 13815a6d3416SJamal Hadi Salim u32 fwdscnt; 13825a6d3416SJamal Hadi Salim u32 spdhcnt; 13835a6d3416SJamal Hadi Salim u32 spdhmcnt; 13845a6d3416SJamal Hadi Salim }; 13855a6d3416SJamal Hadi Salim 1386bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, 1387bd55775cSJamal Hadi Salim u32 seq); 138826b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 13890e602451SAlexey Dobriyan extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); 1390e071041bSAlexey Dobriyan extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); 1391e071041bSAlexey Dobriyan extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); 1392afeb14b4SPaul Moore extern int xfrm_replay_check(struct xfrm_state *x, 1393afeb14b4SPaul Moore struct sk_buff *skb, __be32 seq); 139461f4627bSAl Viro extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); 1395f8cd5488SJamal Hadi Salim extern void xfrm_replay_notify(struct xfrm_state *x, int event); 13961da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 139772cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1398227620e2SHerbert Xu extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1399716062fdSHerbert Xu extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, 1400716062fdSHerbert Xu int encap_type); 14011bf06cd2SHerbert Xu extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1402c6581a45SHerbert Xu extern int xfrm_output_resume(struct sk_buff *skb, int err); 1403406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 1404df9dcb45SKazunori MIYAZAWA extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 140536cf9acfSHerbert Xu extern int xfrm4_extract_header(struct sk_buff *skb); 1406227620e2SHerbert Xu extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1407c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1408c4541b41SHerbert Xu int encap_type); 1409716062fdSHerbert Xu extern int xfrm4_transport_finish(struct sk_buff *skb, int async); 14101da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1411c4541b41SHerbert Xu 1412c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1413c4541b41SHerbert Xu { 1414c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1415c4541b41SHerbert Xu } 1416c4541b41SHerbert Xu 141736cf9acfSHerbert Xu extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 141836cf9acfSHerbert Xu extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14191da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 1420c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1421c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 142236cf9acfSHerbert Xu extern int xfrm6_extract_header(struct sk_buff *skb); 1423227620e2SHerbert Xu extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 142433b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1425716062fdSHerbert Xu extern int xfrm6_transport_finish(struct sk_buff *skb, int async); 1426e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1427fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1428fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 142973d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 143073d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 1431a1664773SAlexey Dobriyan extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); 1432a1664773SAlexey Dobriyan extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, xfrm_address_t *saddr); 143336cf9acfSHerbert Xu extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 143436cf9acfSHerbert Xu extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14351da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 1436aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1437aee5adb4SMasahide NAKAMURA u8 **prevhdr); 14381da177e4SLinus Torvalds 14391da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1440067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 14411da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 14421da177e4SLinus Torvalds #else 14431da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 14441da177e4SLinus Torvalds { 14451da177e4SLinus Torvalds return -ENOPROTOOPT; 14461da177e4SLinus Torvalds } 14471da177e4SLinus Torvalds 1448067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 14491da177e4SLinus Torvalds { 14501da177e4SLinus Torvalds /* should not happen */ 14511da177e4SLinus Torvalds kfree_skb(skb); 14521da177e4SLinus Torvalds return 0; 14531da177e4SLinus Torvalds } 14541da177e4SLinus Torvalds #endif 14551da177e4SLinus Torvalds 14560331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 14574c563f76STimo Teras 145812a169e7SHerbert Xu extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 1459cdcbca7cSAlexey Dobriyan extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, 14604c563f76STimo Teras int (*func)(struct xfrm_policy *, int, int, void*), void *); 146112a169e7SHerbert Xu extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); 14621da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 14638ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, 14648ca2e93bSJamal Hadi Salim u8 type, int dir, 14654e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1466ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1467ef41aaa0SEric Paris int *err); 14688ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err); 146933ffbbd5SAlexey Dobriyan int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); 14701da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1471658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 1472bd55775cSJamal Hadi Salim struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark, 1473bd55775cSJamal Hadi Salim u8 mode, u32 reqid, u8 proto, 1474bd55775cSJamal Hadi Salim xfrm_address_t *daddr, 1475bd55775cSJamal Hadi Salim xfrm_address_t *saddr, int create, 1476bd55775cSJamal Hadi Salim unsigned short family); 14771da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 14781da177e4SLinus Torvalds 147980c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 148080c9abaaSShinta Sugimoto extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 148113c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 148213c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 148380c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 148480c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 148580c9abaaSShinta Sugimoto struct xfrm_migrate *m); 148680c9abaaSShinta Sugimoto extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 148713c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 148813c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 148980c9abaaSShinta Sugimoto #endif 149080c9abaaSShinta Sugimoto 14915d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 14926c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 1493db983c11SAlexey Dobriyan extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 14941da177e4SLinus Torvalds 14951da177e4SLinus Torvalds extern void xfrm_input_init(void); 14966067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 14971da177e4SLinus Torvalds 14981da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 14991da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 15001da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 15011da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 15021da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 15031da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 15041da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 15051da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 15061da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); 15071da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); 15081da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); 15091a6509d9SHerbert Xu extern struct xfrm_algo_desc *xfrm_aead_get_byname(char *name, int icv_len, 15101a6509d9SHerbert Xu int probe); 15111da177e4SLinus Torvalds 151207d4ee58SHerbert Xu struct hash_desc; 15139409f38aSHerbert Xu struct scatterlist; 151407d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 151507d4ee58SHerbert Xu unsigned int); 15161da177e4SLinus Torvalds 15171da177e4SLinus Torvalds static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, 15181da177e4SLinus Torvalds int family) 15191da177e4SLinus Torvalds { 15201da177e4SLinus Torvalds switch (family) { 15211da177e4SLinus Torvalds default: 15221da177e4SLinus Torvalds case AF_INET: 1523a6337463Sjamal return (__force u32)a->a4 - (__force u32)b->a4; 15241da177e4SLinus Torvalds case AF_INET6: 15251da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 15261da177e4SLinus Torvalds (struct in6_addr *)b); 15271da177e4SLinus Torvalds } 15281da177e4SLinus Torvalds } 15291da177e4SLinus Torvalds 153077d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 153177d8d7a6SHerbert Xu { 153277d8d7a6SHerbert Xu return index & 7; 153377d8d7a6SHerbert Xu } 153477d8d7a6SHerbert Xu 1535a6483b79SAlexey Dobriyan #ifdef CONFIG_XFRM 1536a6483b79SAlexey Dobriyan static inline int xfrm_aevent_is_on(struct net *net) 1537f8cd5488SJamal Hadi Salim { 1538be33690dSPatrick McHardy struct sock *nlsk; 1539be33690dSPatrick McHardy int ret = 0; 1540be33690dSPatrick McHardy 1541be33690dSPatrick McHardy rcu_read_lock(); 1542a6483b79SAlexey Dobriyan nlsk = rcu_dereference(net->xfrm.nlsk); 1543be33690dSPatrick McHardy if (nlsk) 1544be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1545be33690dSPatrick McHardy rcu_read_unlock(); 1546be33690dSPatrick McHardy return ret; 1547f8cd5488SJamal Hadi Salim } 1548a6483b79SAlexey Dobriyan #endif 1549f8cd5488SJamal Hadi Salim 15500f99be0dSEric Dumazet static inline int xfrm_alg_len(struct xfrm_algo *alg) 15510f99be0dSEric Dumazet { 15520f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 15530f99be0dSEric Dumazet } 15540f99be0dSEric Dumazet 15554447bb33SMartin Willi static inline int xfrm_alg_auth_len(struct xfrm_algo_auth *alg) 15564447bb33SMartin Willi { 15574447bb33SMartin Willi return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 15584447bb33SMartin Willi } 15594447bb33SMartin Willi 156080c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 156180c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 156280c9abaaSShinta Sugimoto { 15630f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 156480c9abaaSShinta Sugimoto } 156580c9abaaSShinta Sugimoto 15664447bb33SMartin Willi static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) 15674447bb33SMartin Willi { 15684447bb33SMartin Willi return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); 15694447bb33SMartin Willi } 15704447bb33SMartin Willi 157180c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 157280c9abaaSShinta Sugimoto { 157380c9abaaSShinta Sugimoto int i; 157480c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 157580c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 157680c9abaaSShinta Sugimoto } 157780c9abaaSShinta Sugimoto 157880c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 157980c9abaaSShinta Sugimoto { 158080c9abaaSShinta Sugimoto int i; 158180c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 158280c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 158380c9abaaSShinta Sugimoto } 158480c9abaaSShinta Sugimoto #endif 1585f8cd5488SJamal Hadi Salim 1586def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 158700501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 158800501121SHerbert Xu { 158900501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 159000501121SHerbert Xu } 1591def8b4faSAlexey Dobriyan #endif 159200501121SHerbert Xu 1593bf825f81SJamal Hadi Salim static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) 1594bf825f81SJamal Hadi Salim { 1595bf825f81SJamal Hadi Salim if (attrs[XFRMA_MARK]) 15964efd7e83SAndreas Steffen memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); 1597bf825f81SJamal Hadi Salim else 1598bf825f81SJamal Hadi Salim m->v = m->m = 0; 1599bf825f81SJamal Hadi Salim 1600bf825f81SJamal Hadi Salim return m->v & m->m; 1601bf825f81SJamal Hadi Salim } 1602bf825f81SJamal Hadi Salim 1603bf825f81SJamal Hadi Salim static inline int xfrm_mark_put(struct sk_buff *skb, struct xfrm_mark *m) 1604bf825f81SJamal Hadi Salim { 1605bf825f81SJamal Hadi Salim if (m->m | m->v) 1606bf825f81SJamal Hadi Salim NLA_PUT(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); 1607bf825f81SJamal Hadi Salim return 0; 1608bf825f81SJamal Hadi Salim 1609bf825f81SJamal Hadi Salim nla_put_failure: 1610bf825f81SJamal Hadi Salim return -1; 1611bf825f81SJamal Hadi Salim } 1612bf825f81SJamal Hadi Salim 16131da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1614