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); 337df0ba92aSMasahide NAKAMURA int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); 338aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3391da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 340c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3411da177e4SLinus Torvalds }; 3421da177e4SLinus Torvalds 343533cb5b0SEric Dumazet extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 344533cb5b0SEric Dumazet extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 3451da177e4SLinus Torvalds 346b59f45d0SHerbert Xu struct xfrm_mode { 347227620e2SHerbert Xu /* 348227620e2SHerbert Xu * Remove encapsulation header. 349227620e2SHerbert Xu * 350227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 351227620e2SHerbert Xu * header. 352227620e2SHerbert Xu * 353227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 354227620e2SHerbert Xu * should be and the network header shall be set to where the IP 355227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 356227620e2SHerbert Xu * payload. 357227620e2SHerbert Xu */ 358227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 359227620e2SHerbert Xu 360227620e2SHerbert Xu /* 361227620e2SHerbert Xu * This is the actual input entry point. 362227620e2SHerbert Xu * 363227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 364227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 365227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 366227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 367227620e2SHerbert Xu */ 368b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 36937fedd3aSHerbert Xu 37037fedd3aSHerbert Xu /* 37137fedd3aSHerbert Xu * Add encapsulation header. 37237fedd3aSHerbert Xu * 37337fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 37437fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 37537fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 37637fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 37737fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 37837fedd3aSHerbert Xu * header. The value of the network header will always point 37937fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 38037fedd3aSHerbert Xu */ 38136cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 38236cf9acfSHerbert Xu 38336cf9acfSHerbert Xu /* 38436cf9acfSHerbert Xu * This is the actual output entry point. 38536cf9acfSHerbert Xu * 38636cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 38736cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 38836cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 38936cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 39036cf9acfSHerbert Xu * call output2. 39136cf9acfSHerbert Xu */ 392eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 393b59f45d0SHerbert Xu 39417c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 395b59f45d0SHerbert Xu struct module *owner; 396b59f45d0SHerbert Xu unsigned int encap; 3971bfcb10fSHerbert Xu int flags; 3981bfcb10fSHerbert Xu }; 3991bfcb10fSHerbert Xu 4001bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 4011bfcb10fSHerbert Xu enum { 4021bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 403b59f45d0SHerbert Xu }; 404b59f45d0SHerbert Xu 405b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 406b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 407b59f45d0SHerbert Xu 408df9dcb45SKazunori MIYAZAWA static inline int xfrm_af2proto(unsigned int family) 409df9dcb45SKazunori MIYAZAWA { 410df9dcb45SKazunori MIYAZAWA switch(family) { 411df9dcb45SKazunori MIYAZAWA case AF_INET: 412df9dcb45SKazunori MIYAZAWA return IPPROTO_IPIP; 413df9dcb45SKazunori MIYAZAWA case AF_INET6: 414df9dcb45SKazunori MIYAZAWA return IPPROTO_IPV6; 415df9dcb45SKazunori MIYAZAWA default: 416df9dcb45SKazunori MIYAZAWA return 0; 417df9dcb45SKazunori MIYAZAWA } 418df9dcb45SKazunori MIYAZAWA } 419df9dcb45SKazunori MIYAZAWA 420df9dcb45SKazunori MIYAZAWA static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) 421df9dcb45SKazunori MIYAZAWA { 422df9dcb45SKazunori MIYAZAWA if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || 423df9dcb45SKazunori MIYAZAWA (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) 424df9dcb45SKazunori MIYAZAWA return x->inner_mode; 425df9dcb45SKazunori MIYAZAWA else 426df9dcb45SKazunori MIYAZAWA return x->inner_mode_iaf; 427df9dcb45SKazunori MIYAZAWA } 428df9dcb45SKazunori MIYAZAWA 429fd2c3ef7SEric Dumazet struct xfrm_tmpl { 4301da177e4SLinus Torvalds /* id in template is interpreted as: 4311da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 4321da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 4331da177e4SLinus Torvalds * daddr must be fixed too. 4341da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 4351da177e4SLinus Torvalds */ 4361da177e4SLinus Torvalds struct xfrm_id id; 4371da177e4SLinus Torvalds 4381da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 4391da177e4SLinus Torvalds xfrm_address_t saddr; 4401da177e4SLinus Torvalds 44176b3f055SMiika Komu unsigned short encap_family; 44276b3f055SMiika Komu 443a6337463Sjamal u32 reqid; 4441da177e4SLinus Torvalds 4457e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 446a6337463Sjamal u8 mode; 4471da177e4SLinus Torvalds 4481da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 449a6337463Sjamal u8 share; 4501da177e4SLinus Torvalds 4511da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 452a6337463Sjamal u8 optional; 4531da177e4SLinus Torvalds 454c5d18e98SHerbert Xu /* Skip aalgos/ealgos/calgos checks. */ 455a6337463Sjamal u8 allalgs; 456c5d18e98SHerbert Xu 4571da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 458a6337463Sjamal u32 aalgos; 459a6337463Sjamal u32 ealgos; 460a6337463Sjamal u32 calgos; 4611da177e4SLinus Torvalds }; 4621da177e4SLinus Torvalds 463622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 4641da177e4SLinus Torvalds 46512a169e7SHerbert Xu struct xfrm_policy_walk_entry { 46612a169e7SHerbert Xu struct list_head all; 46712a169e7SHerbert Xu u8 dead; 46812a169e7SHerbert Xu }; 46912a169e7SHerbert Xu 47012a169e7SHerbert Xu struct xfrm_policy_walk { 47112a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 47212a169e7SHerbert Xu u8 type; 47312a169e7SHerbert Xu u32 seq; 47412a169e7SHerbert Xu }; 47512a169e7SHerbert Xu 476fd2c3ef7SEric Dumazet struct xfrm_policy { 4770331b1f3SAlexey Dobriyan #ifdef CONFIG_NET_NS 4780331b1f3SAlexey Dobriyan struct net *xp_net; 4790331b1f3SAlexey Dobriyan #endif 4802518c7c2SDavid S. Miller struct hlist_node bydst; 4812518c7c2SDavid S. Miller struct hlist_node byidx; 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 4841da177e4SLinus Torvalds rwlock_t lock; 4851da177e4SLinus Torvalds atomic_t refcnt; 4861da177e4SLinus Torvalds struct timer_list timer; 4871da177e4SLinus Torvalds 488fe1a5f03STimo Teräs struct flow_cache_object flo; 48980c802f3STimo Teräs atomic_t genid; 4901da177e4SLinus Torvalds u32 priority; 4911da177e4SLinus Torvalds u32 index; 492bf825f81SJamal Hadi Salim struct xfrm_mark mark; 4931da177e4SLinus Torvalds struct xfrm_selector selector; 4941da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 4951da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 49612a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 49746ca5f5dSArnaldo Carvalho de Melo u8 type; 49846ca5f5dSArnaldo Carvalho de Melo u8 action; 49946ca5f5dSArnaldo Carvalho de Melo u8 flags; 50046ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 50112a169e7SHerbert Xu u16 family; 502df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 5031da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 5041da177e4SLinus Torvalds }; 5051da177e4SLinus Torvalds 5060331b1f3SAlexey Dobriyan static inline struct net *xp_net(struct xfrm_policy *xp) 5070331b1f3SAlexey Dobriyan { 5080331b1f3SAlexey Dobriyan return read_pnet(&xp->xp_net); 5090331b1f3SAlexey Dobriyan } 5100331b1f3SAlexey Dobriyan 51113c1d189SArnaud Ebalard struct xfrm_kmaddress { 51213c1d189SArnaud Ebalard xfrm_address_t local; 51313c1d189SArnaud Ebalard xfrm_address_t remote; 51413c1d189SArnaud Ebalard u32 reserved; 51513c1d189SArnaud Ebalard u16 family; 51613c1d189SArnaud Ebalard }; 51713c1d189SArnaud Ebalard 51880c9abaaSShinta Sugimoto struct xfrm_migrate { 51980c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 52080c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 52180c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 52280c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 52380c9abaaSShinta Sugimoto u8 proto; 52480c9abaaSShinta Sugimoto u8 mode; 52580c9abaaSShinta Sugimoto u16 reserved; 52680c9abaaSShinta Sugimoto u32 reqid; 52780c9abaaSShinta Sugimoto u16 old_family; 52880c9abaaSShinta Sugimoto u16 new_family; 52980c9abaaSShinta Sugimoto }; 53080c9abaaSShinta Sugimoto 5311da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 532f8cd5488SJamal Hadi Salim /* which seqno */ 533f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 534f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 535f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 536f8cd5488SJamal Hadi Salim /* what happened */ 537f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 538f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 539f8cd5488SJamal Hadi Salim 540f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 541f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 542f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 543f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 544f8cd5488SJamal Hadi Salim /* default seq threshold size */ 545f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 5461da177e4SLinus Torvalds 547fd2c3ef7SEric Dumazet struct xfrm_mgr { 5481da177e4SLinus Torvalds struct list_head list; 5491da177e4SLinus Torvalds char *id; 55026b15dadSJamal Hadi Salim int (*notify)(struct xfrm_state *x, struct km_event *c); 5511da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 552cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 5535d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 55426b15dadSJamal Hadi Salim int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); 555db983c11SAlexey Dobriyan int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 55613c1d189SArnaud Ebalard int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles, struct xfrm_kmaddress *k); 5571da177e4SLinus Torvalds }; 5581da177e4SLinus Torvalds 5591da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 5601da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 5611da177e4SLinus Torvalds 562436a0a40SHerbert Xu /* 563436a0a40SHerbert Xu * This structure is used for the duration where packets are being 564436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 565436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 566436a0a40SHerbert Xu */ 567436a0a40SHerbert Xu struct xfrm_skb_cb { 568436a0a40SHerbert Xu union { 569436a0a40SHerbert Xu struct inet_skb_parm h4; 570436a0a40SHerbert Xu struct inet6_skb_parm h6; 571436a0a40SHerbert Xu } header; 572436a0a40SHerbert Xu 573436a0a40SHerbert Xu /* Sequence number for replay protection. */ 574b318e0e4SHerbert Xu union { 575b318e0e4SHerbert Xu u64 output; 576b318e0e4SHerbert Xu __be32 input; 577b318e0e4SHerbert Xu } seq; 578436a0a40SHerbert Xu }; 579436a0a40SHerbert Xu 580436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 581436a0a40SHerbert Xu 58236cf9acfSHerbert Xu /* 58336cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 58436cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 58536cf9acfSHerbert Xu */ 58636cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 58736cf9acfSHerbert Xu union { 58836cf9acfSHerbert Xu struct inet_skb_parm h4; 58936cf9acfSHerbert Xu struct inet6_skb_parm h6; 59036cf9acfSHerbert Xu } header; 59136cf9acfSHerbert Xu 59236cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 59336cf9acfSHerbert Xu __be16 id; 59436cf9acfSHerbert Xu __be16 frag_off; 59536cf9acfSHerbert Xu 596732c8bd5SHerbert Xu /* IP header length (excluding options or extension headers). */ 597732c8bd5SHerbert Xu u8 ihl; 598732c8bd5SHerbert Xu 59936cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 60036cf9acfSHerbert Xu u8 tos; 60136cf9acfSHerbert Xu 60236cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 60336cf9acfSHerbert Xu u8 ttl; 60436cf9acfSHerbert Xu 60536cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 60636cf9acfSHerbert Xu u8 protocol; 60736cf9acfSHerbert Xu 608732c8bd5SHerbert Xu /* Option length for IPv4, zero for IPv6. */ 609732c8bd5SHerbert Xu u8 optlen; 610732c8bd5SHerbert Xu 61136cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 61236cf9acfSHerbert Xu u8 flow_lbl[3]; 61336cf9acfSHerbert Xu }; 61436cf9acfSHerbert Xu 61536cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 61636cf9acfSHerbert Xu 617716062fdSHerbert Xu /* 618716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 619716062fdSHerbert Xu * related information. 620716062fdSHerbert Xu */ 621716062fdSHerbert Xu struct xfrm_spi_skb_cb { 622716062fdSHerbert Xu union { 623716062fdSHerbert Xu struct inet_skb_parm h4; 624716062fdSHerbert Xu struct inet6_skb_parm h6; 625716062fdSHerbert Xu } header; 626716062fdSHerbert Xu 627716062fdSHerbert Xu unsigned int daddroff; 6282fcb45b6SHerbert Xu unsigned int family; 629716062fdSHerbert Xu }; 630716062fdSHerbert Xu 631716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 632716062fdSHerbert Xu 633161a09e7SJoy Latten /* Audit Information */ 634fd2c3ef7SEric Dumazet struct xfrm_audit { 635161a09e7SJoy Latten u32 secid; 6362532386fSEric Paris uid_t loginuid; 6372532386fSEric Paris u32 sessionid; 638161a09e7SJoy Latten }; 639c9204d9cSJoy Latten 640c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 641afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 642ab5f5e8bSJoy Latten { 643ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 644ab5f5e8bSJoy Latten 645afeb14b4SPaul Moore if (audit_enabled == 0) 646afeb14b4SPaul Moore return NULL; 647ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 648ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 649ab5f5e8bSJoy Latten if (audit_buf == NULL) 650ab5f5e8bSJoy Latten return NULL; 651afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 652afeb14b4SPaul Moore return audit_buf; 653afeb14b4SPaul Moore } 654afeb14b4SPaul Moore 6552532386fSEric Paris static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid, 656afeb14b4SPaul Moore struct audit_buffer *audit_buf) 657afeb14b4SPaul Moore { 658afeb14b4SPaul Moore char *secctx; 659afeb14b4SPaul Moore u32 secctx_len; 660ab5f5e8bSJoy Latten 6612532386fSEric Paris audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); 66268277accSPaul Moore if (secid != 0 && 66368277accSPaul Moore security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { 664ab5f5e8bSJoy Latten audit_log_format(audit_buf, " subj=%s", secctx); 665ab5f5e8bSJoy Latten security_release_secctx(secctx, secctx_len); 666ab5f5e8bSJoy Latten } else 667ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 668ab5f5e8bSJoy Latten } 669ab5f5e8bSJoy Latten 670ab5f5e8bSJoy Latten extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 6712532386fSEric Paris u32 auid, u32 ses, u32 secid); 672ab5f5e8bSJoy Latten extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 6732532386fSEric Paris u32 auid, u32 ses, u32 secid); 674ab5f5e8bSJoy Latten extern void xfrm_audit_state_add(struct xfrm_state *x, int result, 6752532386fSEric Paris u32 auid, u32 ses, u32 secid); 676ab5f5e8bSJoy Latten extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, 6772532386fSEric Paris u32 auid, u32 ses, u32 secid); 678afeb14b4SPaul Moore extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 679afeb14b4SPaul Moore struct sk_buff *skb); 680afeb14b4SPaul Moore extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 681afeb14b4SPaul Moore extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 682afeb14b4SPaul Moore __be32 net_spi, __be32 net_seq); 683afeb14b4SPaul Moore extern void xfrm_audit_state_icvfail(struct xfrm_state *x, 684afeb14b4SPaul Moore struct sk_buff *skb, u8 proto); 685c9204d9cSJoy Latten #else 68641fef0eeSMarcin Slusarz 68741fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 68841fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 68941fef0eeSMarcin Slusarz { 69041fef0eeSMarcin Slusarz } 69141fef0eeSMarcin Slusarz 69241fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 69341fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 69441fef0eeSMarcin Slusarz { 69541fef0eeSMarcin Slusarz } 69641fef0eeSMarcin Slusarz 69741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, 69841fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 69941fef0eeSMarcin Slusarz { 70041fef0eeSMarcin Slusarz } 70141fef0eeSMarcin Slusarz 70241fef0eeSMarcin Slusarz static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, 70341fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 70441fef0eeSMarcin Slusarz { 70541fef0eeSMarcin Slusarz } 70641fef0eeSMarcin Slusarz 70741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 70841fef0eeSMarcin Slusarz struct sk_buff *skb) 70941fef0eeSMarcin Slusarz { 71041fef0eeSMarcin Slusarz } 71141fef0eeSMarcin Slusarz 71241fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, 71341fef0eeSMarcin Slusarz u16 family) 71441fef0eeSMarcin Slusarz { 71541fef0eeSMarcin Slusarz } 71641fef0eeSMarcin Slusarz 71741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 71841fef0eeSMarcin Slusarz __be32 net_spi, __be32 net_seq) 71941fef0eeSMarcin Slusarz { 72041fef0eeSMarcin Slusarz } 72141fef0eeSMarcin Slusarz 72241fef0eeSMarcin Slusarz static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, 72341fef0eeSMarcin Slusarz struct sk_buff *skb, u8 proto) 72441fef0eeSMarcin Slusarz { 72541fef0eeSMarcin Slusarz } 726c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 727161a09e7SJoy Latten 7281da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 7291da177e4SLinus Torvalds { 7301da177e4SLinus Torvalds if (likely(policy != NULL)) 7311da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 7321da177e4SLinus Torvalds } 7331da177e4SLinus Torvalds 73464c31b3fSWANG Cong extern void xfrm_policy_destroy(struct xfrm_policy *policy); 7351da177e4SLinus Torvalds 7361da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 7371da177e4SLinus Torvalds { 7381da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 73964c31b3fSWANG Cong xfrm_policy_destroy(policy); 7401da177e4SLinus Torvalds } 7411da177e4SLinus Torvalds 7424e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7434e81bb83SMasahide NAKAMURA { 7444e81bb83SMasahide NAKAMURA int i; 7454e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 7464e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 7474e81bb83SMasahide NAKAMURA } 7484e81bb83SMasahide NAKAMURA 7491da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 7501da177e4SLinus Torvalds 75121380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 75221380b81SHerbert Xu { 75321380b81SHerbert Xu atomic_dec(&x->refcnt); 75421380b81SHerbert Xu } 75521380b81SHerbert Xu 7561da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 7571da177e4SLinus Torvalds { 7581da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 7591da177e4SLinus Torvalds __xfrm_state_destroy(x); 7601da177e4SLinus Torvalds } 7611da177e4SLinus Torvalds 7621da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 7631da177e4SLinus Torvalds { 7641da177e4SLinus Torvalds atomic_inc(&x->refcnt); 7651da177e4SLinus Torvalds } 7661da177e4SLinus Torvalds 7671da177e4SLinus Torvalds static __inline__ int addr_match(void *token1, void *token2, int prefixlen) 7681da177e4SLinus Torvalds { 7695f19343fSAl Viro __be32 *a1 = token1; 7705f19343fSAl Viro __be32 *a2 = token2; 7711da177e4SLinus Torvalds int pdw; 7721da177e4SLinus Torvalds int pbi; 7731da177e4SLinus Torvalds 774a6337463Sjamal pdw = prefixlen >> 5; /* num of whole u32 in prefix */ 7751da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 7761da177e4SLinus Torvalds 7771da177e4SLinus Torvalds if (pdw) 7781da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 7791da177e4SLinus Torvalds return 0; 7801da177e4SLinus Torvalds 7811da177e4SLinus Torvalds if (pbi) { 7825f19343fSAl Viro __be32 mask; 7831da177e4SLinus Torvalds 7841da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 7851da177e4SLinus Torvalds 7861da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 7871da177e4SLinus Torvalds return 0; 7881da177e4SLinus Torvalds } 7891da177e4SLinus Torvalds 7901da177e4SLinus Torvalds return 1; 7911da177e4SLinus Torvalds } 7921da177e4SLinus Torvalds 7931da177e4SLinus Torvalds static __inline__ 794e8a4e377SDavid S. Miller __be16 xfrm_flowi_sport(const struct flowi *fl) 7951da177e4SLinus Torvalds { 796f9d07e41SAl Viro __be16 port; 7971da177e4SLinus Torvalds switch(fl->proto) { 7981da177e4SLinus Torvalds case IPPROTO_TCP: 7991da177e4SLinus Torvalds case IPPROTO_UDP: 800ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8011da177e4SLinus Torvalds case IPPROTO_SCTP: 8021da177e4SLinus Torvalds port = fl->fl_ip_sport; 8031da177e4SLinus Torvalds break; 8041da177e4SLinus Torvalds case IPPROTO_ICMP: 8051da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8061da177e4SLinus Torvalds port = htons(fl->fl_icmp_type); 8071da177e4SLinus Torvalds break; 8082ce4272aSMasahide NAKAMURA case IPPROTO_MH: 8092ce4272aSMasahide NAKAMURA port = htons(fl->fl_mh_type); 8102ce4272aSMasahide NAKAMURA break; 811cc9ff19dSTimo Teräs case IPPROTO_GRE: 812aa285b17STimo Teräs port = htons(ntohl(fl->fl_gre_key) >> 16); 813cc9ff19dSTimo Teräs break; 8141da177e4SLinus Torvalds default: 8151da177e4SLinus Torvalds port = 0; /*XXX*/ 8161da177e4SLinus Torvalds } 8171da177e4SLinus Torvalds return port; 8181da177e4SLinus Torvalds } 8191da177e4SLinus Torvalds 8201da177e4SLinus Torvalds static __inline__ 821e8a4e377SDavid S. Miller __be16 xfrm_flowi_dport(const struct flowi *fl) 8221da177e4SLinus Torvalds { 823f9d07e41SAl Viro __be16 port; 8241da177e4SLinus Torvalds switch(fl->proto) { 8251da177e4SLinus Torvalds case IPPROTO_TCP: 8261da177e4SLinus Torvalds case IPPROTO_UDP: 827ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8281da177e4SLinus Torvalds case IPPROTO_SCTP: 8291da177e4SLinus Torvalds port = fl->fl_ip_dport; 8301da177e4SLinus Torvalds break; 8311da177e4SLinus Torvalds case IPPROTO_ICMP: 8321da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8331da177e4SLinus Torvalds port = htons(fl->fl_icmp_code); 8341da177e4SLinus Torvalds break; 835cc9ff19dSTimo Teräs case IPPROTO_GRE: 836aa285b17STimo Teräs port = htons(ntohl(fl->fl_gre_key) & 0xffff); 837cc9ff19dSTimo Teräs break; 8381da177e4SLinus Torvalds default: 8391da177e4SLinus Torvalds port = 0; /*XXX*/ 8401da177e4SLinus Torvalds } 8411da177e4SLinus Torvalds return port; 8421da177e4SLinus Torvalds } 8431da177e4SLinus Torvalds 84477681021SAndrew Morton extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, 84577681021SAndrew Morton unsigned short family); 8461da177e4SLinus Torvalds 847df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 848df71837dSTrent Jaeger /* If neither has a context --> match 849df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 850df71837dSTrent Jaeger */ 851df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 852df71837dSTrent Jaeger { 853df71837dSTrent Jaeger return ((!s1 && !s2) || 854df71837dSTrent Jaeger (s1 && s2 && 855df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 856df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 857df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 858df71837dSTrent Jaeger } 859df71837dSTrent Jaeger #else 860df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 861df71837dSTrent Jaeger { 862df71837dSTrent Jaeger return 1; 863df71837dSTrent Jaeger } 864df71837dSTrent Jaeger #endif 865df71837dSTrent Jaeger 8661da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 8671da177e4SLinus Torvalds * 8681da177e4SLinus Torvalds * dst->child points to the next element of bundle. 8691da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 8701da177e4SLinus Torvalds * 8711da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 8721da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 8731da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 8741da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 8751da177e4SLinus Torvalds * policy rule. 8761da177e4SLinus Torvalds */ 877fd2c3ef7SEric Dumazet struct xfrm_dst { 8781da177e4SLinus Torvalds union { 8791da177e4SLinus Torvalds struct dst_entry dst; 8801da177e4SLinus Torvalds struct rtable rt; 8811da177e4SLinus Torvalds struct rt6_info rt6; 8821da177e4SLinus Torvalds } u; 8831da177e4SLinus Torvalds struct dst_entry *route; 88480c802f3STimo Teräs struct flow_cache_object flo; 88580c802f3STimo Teräs struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; 88680c802f3STimo Teräs int num_pols, num_xfrms; 887157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 888157bfc25SMasahide NAKAMURA struct flowi *origin; 889157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 890157bfc25SMasahide NAKAMURA #endif 89180c802f3STimo Teräs u32 xfrm_genid; 89280c802f3STimo Teräs u32 policy_genid; 8931da177e4SLinus Torvalds u32 route_mtu_cached; 8941da177e4SLinus Torvalds u32 child_mtu_cached; 89592d63decSHideaki YOSHIFUJI u32 route_cookie; 89692d63decSHideaki YOSHIFUJI u32 path_cookie; 8971da177e4SLinus Torvalds }; 8981da177e4SLinus Torvalds 899def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 900aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 901aabc9761SHerbert Xu { 90280c802f3STimo Teräs xfrm_pols_put(xdst->pols, xdst->num_pols); 903aabc9761SHerbert Xu dst_release(xdst->route); 904aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 905aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 906157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 907157bfc25SMasahide NAKAMURA kfree(xdst->origin); 908157bfc25SMasahide NAKAMURA xdst->origin = NULL; 909157bfc25SMasahide NAKAMURA kfree(xdst->partner); 910157bfc25SMasahide NAKAMURA xdst->partner = NULL; 911157bfc25SMasahide NAKAMURA #endif 912aabc9761SHerbert Xu } 913def8b4faSAlexey Dobriyan #endif 914aabc9761SHerbert Xu 915aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 916aabc9761SHerbert Xu 917fd2c3ef7SEric Dumazet struct sec_path { 9181da177e4SLinus Torvalds atomic_t refcnt; 9191da177e4SLinus Torvalds int len; 920dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 9211da177e4SLinus Torvalds }; 9221da177e4SLinus Torvalds 9231da177e4SLinus Torvalds static inline struct sec_path * 9241da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 9251da177e4SLinus Torvalds { 9261da177e4SLinus Torvalds if (sp) 9271da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 9281da177e4SLinus Torvalds return sp; 9291da177e4SLinus Torvalds } 9301da177e4SLinus Torvalds 9311da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 9321da177e4SLinus Torvalds 9331da177e4SLinus Torvalds static inline void 9341da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 9351da177e4SLinus Torvalds { 9361da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 9371da177e4SLinus Torvalds __secpath_destroy(sp); 9381da177e4SLinus Torvalds } 9391da177e4SLinus Torvalds 9401da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 9411da177e4SLinus Torvalds 9421da177e4SLinus Torvalds static inline void 9431da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 9441da177e4SLinus Torvalds { 9451da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9461da177e4SLinus Torvalds secpath_put(skb->sp); 9471da177e4SLinus Torvalds skb->sp = NULL; 9481da177e4SLinus Torvalds #endif 9491da177e4SLinus Torvalds } 9501da177e4SLinus Torvalds 9511da177e4SLinus Torvalds static inline int 952a1e59abfSPatrick McHardy xfrm_addr_any(xfrm_address_t *addr, unsigned short family) 953a1e59abfSPatrick McHardy { 954a1e59abfSPatrick McHardy switch (family) { 955a1e59abfSPatrick McHardy case AF_INET: 956a1e59abfSPatrick McHardy return addr->a4 == 0; 957a1e59abfSPatrick McHardy case AF_INET6: 958a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 959a1e59abfSPatrick McHardy } 960a1e59abfSPatrick McHardy return 0; 961a1e59abfSPatrick McHardy } 962a1e59abfSPatrick McHardy 963a1e59abfSPatrick McHardy static inline int 9641da177e4SLinus Torvalds __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 9651da177e4SLinus Torvalds { 9661da177e4SLinus Torvalds return (tmpl->saddr.a4 && 9671da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 9681da177e4SLinus Torvalds } 9691da177e4SLinus Torvalds 9701da177e4SLinus Torvalds static inline int 9711da177e4SLinus Torvalds __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 9721da177e4SLinus Torvalds { 9731da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 9741da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 9751da177e4SLinus Torvalds } 9761da177e4SLinus Torvalds 9771da177e4SLinus Torvalds static inline int 9781da177e4SLinus Torvalds xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) 9791da177e4SLinus Torvalds { 9801da177e4SLinus Torvalds switch (family) { 9811da177e4SLinus Torvalds case AF_INET: 9821da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 9831da177e4SLinus Torvalds case AF_INET6: 9841da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 9851da177e4SLinus Torvalds } 9861da177e4SLinus Torvalds return !0; 9871da177e4SLinus Torvalds } 9881da177e4SLinus Torvalds 9891da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9901da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 9911da177e4SLinus Torvalds 992d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 993d5422efeSHerbert Xu struct sk_buff *skb, 994d5422efeSHerbert Xu unsigned int family, int reverse) 9951da177e4SLinus Torvalds { 996f6e1e25dSAlexey Dobriyan struct net *net = dev_net(skb->dev); 997d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 998d5422efeSHerbert Xu 9991da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 1000d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 10011da177e4SLinus Torvalds 1002f6e1e25dSAlexey Dobriyan return (!net->xfrm.policy_count[dir] && !skb->sp) || 1003adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOPOLICY) || 1004d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 1005d5422efeSHerbert Xu } 1006d5422efeSHerbert Xu 1007d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 1008d5422efeSHerbert Xu { 1009d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 10101da177e4SLinus Torvalds } 10111da177e4SLinus Torvalds 10121da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10131da177e4SLinus Torvalds { 10141da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 10151da177e4SLinus Torvalds } 10161da177e4SLinus Torvalds 10171da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10181da177e4SLinus Torvalds { 10191da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 10201da177e4SLinus Torvalds } 10211da177e4SLinus Torvalds 1022d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1023d5422efeSHerbert Xu struct sk_buff *skb) 1024d5422efeSHerbert Xu { 1025d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 1026d5422efeSHerbert Xu } 1027d5422efeSHerbert Xu 1028d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1029d5422efeSHerbert Xu struct sk_buff *skb) 1030d5422efeSHerbert Xu { 1031d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 1032d5422efeSHerbert Xu } 1033d5422efeSHerbert Xu 1034d5422efeSHerbert Xu extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1035d5422efeSHerbert Xu unsigned int family, int reverse); 1036d5422efeSHerbert Xu 1037d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1038d5422efeSHerbert Xu unsigned int family) 1039d5422efeSHerbert Xu { 1040d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 1041d5422efeSHerbert Xu } 1042d5422efeSHerbert Xu 1043d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1044d5422efeSHerbert Xu struct flowi *fl, 1045d5422efeSHerbert Xu unsigned int family) 1046d5422efeSHerbert Xu { 1047d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 1048d5422efeSHerbert Xu } 1049d5422efeSHerbert Xu 10501da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 10511da177e4SLinus Torvalds 10521da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 10531da177e4SLinus Torvalds { 105499a66657SAlexey Dobriyan struct net *net = dev_net(skb->dev); 105599a66657SAlexey Dobriyan 105699a66657SAlexey Dobriyan return !net->xfrm.policy_count[XFRM_POLICY_OUT] || 1057adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOXFRM) || 10581da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 10591da177e4SLinus Torvalds } 10601da177e4SLinus Torvalds 10611da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 10621da177e4SLinus Torvalds { 10631da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 10641da177e4SLinus Torvalds } 10651da177e4SLinus Torvalds 10661da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 10671da177e4SLinus Torvalds { 10681da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 10691da177e4SLinus Torvalds } 10701da177e4SLinus Torvalds 10711da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 10721da177e4SLinus Torvalds 10731da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 10741da177e4SLinus Torvalds { 10751da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 10761da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 10771da177e4SLinus Torvalds return 0; 10781da177e4SLinus Torvalds } 10791da177e4SLinus Torvalds 10804666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 10811da177e4SLinus Torvalds 10821da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 10831da177e4SLinus Torvalds { 10841da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 10851da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 10861da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 10871da177e4SLinus Torvalds } 10881da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 10891da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 10901da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 10911da177e4SLinus Torvalds } 10921da177e4SLinus Torvalds } 10931da177e4SLinus Torvalds 10941da177e4SLinus Torvalds #else 10951da177e4SLinus Torvalds 10961da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 10971da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 10981da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 10991da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 11001da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11011da177e4SLinus Torvalds { 11021da177e4SLinus Torvalds return 1; 11031da177e4SLinus Torvalds } 11041da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11051da177e4SLinus Torvalds { 11061da177e4SLinus Torvalds return 1; 11071da177e4SLinus Torvalds } 11081da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 11091da177e4SLinus Torvalds { 11101da177e4SLinus Torvalds return 1; 11111da177e4SLinus Torvalds } 1112d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1113d5422efeSHerbert Xu struct flowi *fl, 1114d5422efeSHerbert Xu unsigned int family) 1115d5422efeSHerbert Xu { 1116d5422efeSHerbert Xu return -ENOSYS; 1117d5422efeSHerbert Xu } 1118d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1119d5422efeSHerbert Xu struct sk_buff *skb) 1120d5422efeSHerbert Xu { 1121d5422efeSHerbert Xu return 1; 1122d5422efeSHerbert Xu } 1123d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1124d5422efeSHerbert Xu struct sk_buff *skb) 1125d5422efeSHerbert Xu { 1126d5422efeSHerbert Xu return 1; 1127d5422efeSHerbert Xu } 11281da177e4SLinus Torvalds #endif 11291da177e4SLinus Torvalds 11301da177e4SLinus Torvalds static __inline__ 1131e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) 11321da177e4SLinus Torvalds { 11331da177e4SLinus Torvalds switch (family){ 11341da177e4SLinus Torvalds case AF_INET: 11351da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_dst; 11361da177e4SLinus Torvalds case AF_INET6: 11371da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_dst; 11381da177e4SLinus Torvalds } 11391da177e4SLinus Torvalds return NULL; 11401da177e4SLinus Torvalds } 11411da177e4SLinus Torvalds 11421da177e4SLinus Torvalds static __inline__ 1143e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) 11441da177e4SLinus Torvalds { 11451da177e4SLinus Torvalds switch (family){ 11461da177e4SLinus Torvalds case AF_INET: 11471da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_src; 11481da177e4SLinus Torvalds case AF_INET6: 11491da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_src; 11501da177e4SLinus Torvalds } 11511da177e4SLinus Torvalds return NULL; 11521da177e4SLinus Torvalds } 11531da177e4SLinus Torvalds 11549bb182a7SYOSHIFUJI Hideaki static __inline__ 1155e8a4e377SDavid S. Miller void xfrm_flowi_addr_get(const struct flowi *fl, 11569bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 11579bb182a7SYOSHIFUJI Hideaki unsigned short family) 11589bb182a7SYOSHIFUJI Hideaki { 11599bb182a7SYOSHIFUJI Hideaki switch(family) { 11609bb182a7SYOSHIFUJI Hideaki case AF_INET: 11619bb182a7SYOSHIFUJI Hideaki memcpy(&saddr->a4, &fl->fl4_src, sizeof(saddr->a4)); 11629bb182a7SYOSHIFUJI Hideaki memcpy(&daddr->a4, &fl->fl4_dst, sizeof(daddr->a4)); 11639bb182a7SYOSHIFUJI Hideaki break; 11649bb182a7SYOSHIFUJI Hideaki case AF_INET6: 11659bb182a7SYOSHIFUJI Hideaki ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->fl6_src); 11669bb182a7SYOSHIFUJI Hideaki ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->fl6_dst); 11679bb182a7SYOSHIFUJI Hideaki break; 11689bb182a7SYOSHIFUJI Hideaki } 11699bb182a7SYOSHIFUJI Hideaki } 11709bb182a7SYOSHIFUJI Hideaki 11711da177e4SLinus Torvalds static __inline__ int 11721da177e4SLinus Torvalds __xfrm4_state_addr_check(struct xfrm_state *x, 11731da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 11741da177e4SLinus Torvalds { 11751da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 11761da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 11771da177e4SLinus Torvalds return 1; 11781da177e4SLinus Torvalds return 0; 11791da177e4SLinus Torvalds } 11801da177e4SLinus Torvalds 11811da177e4SLinus Torvalds static __inline__ int 11821da177e4SLinus Torvalds __xfrm6_state_addr_check(struct xfrm_state *x, 11831da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 11841da177e4SLinus Torvalds { 11851da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 11861da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 11871da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 11881da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 11891da177e4SLinus Torvalds return 1; 11901da177e4SLinus Torvalds return 0; 11911da177e4SLinus Torvalds } 11921da177e4SLinus Torvalds 11931da177e4SLinus Torvalds static __inline__ int 11941da177e4SLinus Torvalds xfrm_state_addr_check(struct xfrm_state *x, 11951da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 11961da177e4SLinus Torvalds unsigned short family) 11971da177e4SLinus Torvalds { 11981da177e4SLinus Torvalds switch (family) { 11991da177e4SLinus Torvalds case AF_INET: 12001da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 12011da177e4SLinus Torvalds case AF_INET6: 12021da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 12031da177e4SLinus Torvalds } 12041da177e4SLinus Torvalds return 0; 12051da177e4SLinus Torvalds } 12061da177e4SLinus Torvalds 1207e53820deSMasahide NAKAMURA static __inline__ int 1208e8a4e377SDavid S. Miller xfrm_state_addr_flow_check(struct xfrm_state *x, const struct flowi *fl, 1209e53820deSMasahide NAKAMURA unsigned short family) 1210e53820deSMasahide NAKAMURA { 1211e53820deSMasahide NAKAMURA switch (family) { 1212e53820deSMasahide NAKAMURA case AF_INET: 1213e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 1214e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_dst, 1215e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_src); 1216e53820deSMasahide NAKAMURA case AF_INET6: 1217e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 1218e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_dst, 1219e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_src); 1220e53820deSMasahide NAKAMURA } 1221e53820deSMasahide NAKAMURA return 0; 1222e53820deSMasahide NAKAMURA } 1223e53820deSMasahide NAKAMURA 12241da177e4SLinus Torvalds static inline int xfrm_state_kern(struct xfrm_state *x) 12251da177e4SLinus Torvalds { 12261da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 12271da177e4SLinus Torvalds } 12281da177e4SLinus Torvalds 12295794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 12305794708fSMasahide NAKAMURA { 1231dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1232dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1233dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1234dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 12355794708fSMasahide NAKAMURA } 12365794708fSMasahide NAKAMURA 12371da177e4SLinus Torvalds /* 12381da177e4SLinus Torvalds * xfrm algorithm information 12391da177e4SLinus Torvalds */ 12401a6509d9SHerbert Xu struct xfrm_algo_aead_info { 12411a6509d9SHerbert Xu u16 icv_truncbits; 12421a6509d9SHerbert Xu }; 12431a6509d9SHerbert Xu 12441da177e4SLinus Torvalds struct xfrm_algo_auth_info { 12451da177e4SLinus Torvalds u16 icv_truncbits; 12461da177e4SLinus Torvalds u16 icv_fullbits; 12471da177e4SLinus Torvalds }; 12481da177e4SLinus Torvalds 12491da177e4SLinus Torvalds struct xfrm_algo_encr_info { 12501da177e4SLinus Torvalds u16 blockbits; 12511da177e4SLinus Torvalds u16 defkeybits; 12521da177e4SLinus Torvalds }; 12531da177e4SLinus Torvalds 12541da177e4SLinus Torvalds struct xfrm_algo_comp_info { 12551da177e4SLinus Torvalds u16 threshold; 12561da177e4SLinus Torvalds }; 12571da177e4SLinus Torvalds 12581da177e4SLinus Torvalds struct xfrm_algo_desc { 12591da177e4SLinus Torvalds char *name; 126004ff1260SHerbert Xu char *compat; 12611da177e4SLinus Torvalds u8 available:1; 12621da177e4SLinus Torvalds union { 12631a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 12641da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 12651da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 12661da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 12671da177e4SLinus Torvalds } uinfo; 12681da177e4SLinus Torvalds struct sadb_alg desc; 12691da177e4SLinus Torvalds }; 12701da177e4SLinus Torvalds 12711da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 12721da177e4SLinus Torvalds struct xfrm_tunnel { 12731da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1274a6337463Sjamal int (*err_handler)(struct sk_buff *skb, u32 info); 1275d2acc347SHerbert Xu 1276b33eab08SEric Dumazet struct xfrm_tunnel __rcu *next; 1277d2acc347SHerbert Xu int priority; 12781da177e4SLinus Torvalds }; 12791da177e4SLinus Torvalds 12801da177e4SLinus Torvalds struct xfrm6_tunnel { 1281d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1282d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 1283d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info); 12846f0bcf15SEric Dumazet struct xfrm6_tunnel __rcu *next; 1285d2acc347SHerbert Xu int priority; 12861da177e4SLinus Torvalds }; 12871da177e4SLinus Torvalds 12881da177e4SLinus Torvalds extern void xfrm_init(void); 1289a33bc5c1SNeil Horman extern void xfrm4_init(int rt_hash_size); 1290d62ddc21SAlexey Dobriyan extern int xfrm_state_init(struct net *net); 1291d62ddc21SAlexey Dobriyan extern void xfrm_state_fini(struct net *net); 12921da177e4SLinus Torvalds extern void xfrm4_state_init(void); 1293c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1294c35b7e72SDaniel Lezcano extern int xfrm6_init(void); 1295c35b7e72SDaniel Lezcano extern void xfrm6_fini(void); 12960013cabaSDaniel Lezcano extern int xfrm6_state_init(void); 12971da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 1298c35b7e72SDaniel Lezcano #else 1299c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1300c35b7e72SDaniel Lezcano { 1301c35b7e72SDaniel Lezcano return 0; 1302c35b7e72SDaniel Lezcano } 1303c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1304c35b7e72SDaniel Lezcano { 1305c35b7e72SDaniel Lezcano ; 1306c35b7e72SDaniel Lezcano } 1307c35b7e72SDaniel Lezcano #endif 13081da177e4SLinus Torvalds 1309558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1310c68cd1a0SAlexey Dobriyan extern int xfrm_proc_init(struct net *net); 1311c68cd1a0SAlexey Dobriyan extern void xfrm_proc_fini(struct net *net); 1312558f82efSMasahide NAKAMURA #endif 1313558f82efSMasahide NAKAMURA 1314b27aeadbSAlexey Dobriyan extern int xfrm_sysctl_init(struct net *net); 1315b27aeadbSAlexey Dobriyan #ifdef CONFIG_SYSCTL 1316b27aeadbSAlexey Dobriyan extern void xfrm_sysctl_fini(struct net *net); 1317b27aeadbSAlexey Dobriyan #else 1318b27aeadbSAlexey Dobriyan static inline void xfrm_sysctl_fini(struct net *net) 1319b27aeadbSAlexey Dobriyan { 1320b27aeadbSAlexey Dobriyan } 1321b27aeadbSAlexey Dobriyan #endif 1322b27aeadbSAlexey Dobriyan 13235c182458SHerbert Xu extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); 1324284fa7daSAlexey Dobriyan extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 13254c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1326abb81c4fSHerbert Xu extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); 1327673c09beSAlexey Dobriyan extern struct xfrm_state *xfrm_state_alloc(struct net *net); 13281da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, 13291da177e4SLinus Torvalds struct flowi *fl, struct xfrm_tmpl *tmpl, 13301da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 13311da177e4SLinus Torvalds unsigned short family); 1332bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, 13335447c5e4SAlexey Dobriyan xfrm_address_t *daddr, 1334628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1335628529b6SJamal Hadi Salim unsigned short family, 1336628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 13371da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 13381da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 13391da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 13401da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1341bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, 1342bd55775cSJamal Hadi Salim xfrm_address_t *daddr, __be32 spi, 1343bd55775cSJamal Hadi Salim u8 proto, unsigned short family); 1344bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, 1345bd55775cSJamal Hadi Salim xfrm_address_t *daddr, 1346bd55775cSJamal Hadi Salim xfrm_address_t *saddr, 1347bd55775cSJamal Hadi Salim u8 proto, 1348bd55775cSJamal Hadi Salim unsigned short family); 134941a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 135041a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 135141a49cc3SMasahide NAKAMURA int n, unsigned short family); 135241a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 135341a49cc3SMasahide NAKAMURA int n, unsigned short family); 135441a49cc3SMasahide NAKAMURA #else 135541a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 135641a49cc3SMasahide NAKAMURA int n, unsigned short family) 135741a49cc3SMasahide NAKAMURA { 135841a49cc3SMasahide NAKAMURA return -ENOSYS; 135941a49cc3SMasahide NAKAMURA } 136041a49cc3SMasahide NAKAMURA 136141a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 136241a49cc3SMasahide NAKAMURA int n, unsigned short family) 136341a49cc3SMasahide NAKAMURA { 136441a49cc3SMasahide NAKAMURA return -ENOSYS; 136541a49cc3SMasahide NAKAMURA } 136641a49cc3SMasahide NAKAMURA #endif 1367af11e316SJamal Hadi Salim 1368af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1369af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1370af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1371af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1372af11e316SJamal Hadi Salim }; 1373af11e316SJamal Hadi Salim 13745a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 13755a6d3416SJamal Hadi Salim u32 incnt; 13765a6d3416SJamal Hadi Salim u32 outcnt; 13775a6d3416SJamal Hadi Salim u32 fwdcnt; 13785a6d3416SJamal Hadi Salim u32 inscnt; 13795a6d3416SJamal Hadi Salim u32 outscnt; 13805a6d3416SJamal Hadi Salim u32 fwdscnt; 13815a6d3416SJamal Hadi Salim u32 spdhcnt; 13825a6d3416SJamal Hadi Salim u32 spdhmcnt; 13835a6d3416SJamal Hadi Salim }; 13845a6d3416SJamal Hadi Salim 1385bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, 1386bd55775cSJamal Hadi Salim u32 seq); 138726b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 13880e602451SAlexey Dobriyan extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); 1389e071041bSAlexey Dobriyan extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); 1390e071041bSAlexey Dobriyan extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); 1391afeb14b4SPaul Moore extern int xfrm_replay_check(struct xfrm_state *x, 1392afeb14b4SPaul Moore struct sk_buff *skb, __be32 seq); 139361f4627bSAl Viro extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); 1394f8cd5488SJamal Hadi Salim extern void xfrm_replay_notify(struct xfrm_state *x, int event); 13951da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 139672cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1397227620e2SHerbert Xu extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1398716062fdSHerbert Xu extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, 1399716062fdSHerbert Xu int encap_type); 14001bf06cd2SHerbert Xu extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1401c6581a45SHerbert Xu extern int xfrm_output_resume(struct sk_buff *skb, int err); 1402406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 1403df9dcb45SKazunori MIYAZAWA extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 140436cf9acfSHerbert Xu extern int xfrm4_extract_header(struct sk_buff *skb); 1405227620e2SHerbert Xu extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1406c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1407c4541b41SHerbert Xu int encap_type); 1408716062fdSHerbert Xu extern int xfrm4_transport_finish(struct sk_buff *skb, int async); 14091da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1410c4541b41SHerbert Xu 1411c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1412c4541b41SHerbert Xu { 1413c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1414c4541b41SHerbert Xu } 1415c4541b41SHerbert Xu 141636cf9acfSHerbert Xu extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 141736cf9acfSHerbert Xu extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14181da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 1419c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1420c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 142136cf9acfSHerbert Xu extern int xfrm6_extract_header(struct sk_buff *skb); 1422227620e2SHerbert Xu extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 142333b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1424716062fdSHerbert Xu extern int xfrm6_transport_finish(struct sk_buff *skb, int async); 1425e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1426fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1427fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 142873d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 142973d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 1430a1664773SAlexey Dobriyan extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); 1431a1664773SAlexey Dobriyan extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, xfrm_address_t *saddr); 143236cf9acfSHerbert Xu extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 143336cf9acfSHerbert Xu extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14341da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 1435aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1436aee5adb4SMasahide NAKAMURA u8 **prevhdr); 14371da177e4SLinus Torvalds 14381da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1439067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 14401da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 14411da177e4SLinus Torvalds #else 14421da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 14431da177e4SLinus Torvalds { 14441da177e4SLinus Torvalds return -ENOPROTOOPT; 14451da177e4SLinus Torvalds } 14461da177e4SLinus Torvalds 1447067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 14481da177e4SLinus Torvalds { 14491da177e4SLinus Torvalds /* should not happen */ 14501da177e4SLinus Torvalds kfree_skb(skb); 14511da177e4SLinus Torvalds return 0; 14521da177e4SLinus Torvalds } 14531da177e4SLinus Torvalds #endif 14541da177e4SLinus Torvalds 14550331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 14564c563f76STimo Teras 145712a169e7SHerbert Xu extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 1458cdcbca7cSAlexey Dobriyan extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, 14594c563f76STimo Teras int (*func)(struct xfrm_policy *, int, int, void*), void *); 146012a169e7SHerbert Xu extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); 14611da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 14628ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, 14638ca2e93bSJamal Hadi Salim u8 type, int dir, 14644e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1465ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1466ef41aaa0SEric Paris int *err); 14678ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err); 146833ffbbd5SAlexey Dobriyan int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); 14691da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1470658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 1471bd55775cSJamal Hadi Salim struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark, 1472bd55775cSJamal Hadi Salim u8 mode, u32 reqid, u8 proto, 1473bd55775cSJamal Hadi Salim xfrm_address_t *daddr, 1474bd55775cSJamal Hadi Salim xfrm_address_t *saddr, int create, 1475bd55775cSJamal Hadi Salim unsigned short family); 14761da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 14771da177e4SLinus Torvalds 147880c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 147980c9abaaSShinta Sugimoto extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 148013c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 148113c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 148280c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 148380c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 148480c9abaaSShinta Sugimoto struct xfrm_migrate *m); 148580c9abaaSShinta Sugimoto extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 148613c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 148713c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 148880c9abaaSShinta Sugimoto #endif 148980c9abaaSShinta Sugimoto 14905d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 14916c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 1492db983c11SAlexey Dobriyan extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 14931da177e4SLinus Torvalds 14941da177e4SLinus Torvalds extern void xfrm_input_init(void); 14956067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 14961da177e4SLinus Torvalds 14971da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 14981da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 14991da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 15001da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 15011da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 15021da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 15031da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 15041da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 15051da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); 15061da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); 15071da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); 15081a6509d9SHerbert Xu extern struct xfrm_algo_desc *xfrm_aead_get_byname(char *name, int icv_len, 15091a6509d9SHerbert Xu int probe); 15101da177e4SLinus Torvalds 151107d4ee58SHerbert Xu struct hash_desc; 15129409f38aSHerbert Xu struct scatterlist; 151307d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 151407d4ee58SHerbert Xu unsigned int); 15151da177e4SLinus Torvalds 15161da177e4SLinus Torvalds static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, 15171da177e4SLinus Torvalds int family) 15181da177e4SLinus Torvalds { 15191da177e4SLinus Torvalds switch (family) { 15201da177e4SLinus Torvalds default: 15211da177e4SLinus Torvalds case AF_INET: 1522a6337463Sjamal return (__force u32)a->a4 - (__force u32)b->a4; 15231da177e4SLinus Torvalds case AF_INET6: 15241da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 15251da177e4SLinus Torvalds (struct in6_addr *)b); 15261da177e4SLinus Torvalds } 15271da177e4SLinus Torvalds } 15281da177e4SLinus Torvalds 152977d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 153077d8d7a6SHerbert Xu { 153177d8d7a6SHerbert Xu return index & 7; 153277d8d7a6SHerbert Xu } 153377d8d7a6SHerbert Xu 1534a6483b79SAlexey Dobriyan #ifdef CONFIG_XFRM 1535a6483b79SAlexey Dobriyan static inline int xfrm_aevent_is_on(struct net *net) 1536f8cd5488SJamal Hadi Salim { 1537be33690dSPatrick McHardy struct sock *nlsk; 1538be33690dSPatrick McHardy int ret = 0; 1539be33690dSPatrick McHardy 1540be33690dSPatrick McHardy rcu_read_lock(); 1541a6483b79SAlexey Dobriyan nlsk = rcu_dereference(net->xfrm.nlsk); 1542be33690dSPatrick McHardy if (nlsk) 1543be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1544be33690dSPatrick McHardy rcu_read_unlock(); 1545be33690dSPatrick McHardy return ret; 1546f8cd5488SJamal Hadi Salim } 1547a6483b79SAlexey Dobriyan #endif 1548f8cd5488SJamal Hadi Salim 15490f99be0dSEric Dumazet static inline int xfrm_alg_len(struct xfrm_algo *alg) 15500f99be0dSEric Dumazet { 15510f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 15520f99be0dSEric Dumazet } 15530f99be0dSEric Dumazet 15544447bb33SMartin Willi static inline int xfrm_alg_auth_len(struct xfrm_algo_auth *alg) 15554447bb33SMartin Willi { 15564447bb33SMartin Willi return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 15574447bb33SMartin Willi } 15584447bb33SMartin Willi 155980c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 156080c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 156180c9abaaSShinta Sugimoto { 15620f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 156380c9abaaSShinta Sugimoto } 156480c9abaaSShinta Sugimoto 15654447bb33SMartin Willi static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) 15664447bb33SMartin Willi { 15674447bb33SMartin Willi return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); 15684447bb33SMartin Willi } 15694447bb33SMartin Willi 157080c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 157180c9abaaSShinta Sugimoto { 157280c9abaaSShinta Sugimoto int i; 157380c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 157480c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 157580c9abaaSShinta Sugimoto } 157680c9abaaSShinta Sugimoto 157780c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 157880c9abaaSShinta Sugimoto { 157980c9abaaSShinta Sugimoto int i; 158080c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 158180c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 158280c9abaaSShinta Sugimoto } 158380c9abaaSShinta Sugimoto #endif 1584f8cd5488SJamal Hadi Salim 1585def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 158600501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 158700501121SHerbert Xu { 158800501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 158900501121SHerbert Xu } 1590def8b4faSAlexey Dobriyan #endif 159100501121SHerbert Xu 1592bf825f81SJamal Hadi Salim static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) 1593bf825f81SJamal Hadi Salim { 1594bf825f81SJamal Hadi Salim if (attrs[XFRMA_MARK]) 15954efd7e83SAndreas Steffen memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); 1596bf825f81SJamal Hadi Salim else 1597bf825f81SJamal Hadi Salim m->v = m->m = 0; 1598bf825f81SJamal Hadi Salim 1599bf825f81SJamal Hadi Salim return m->v & m->m; 1600bf825f81SJamal Hadi Salim } 1601bf825f81SJamal Hadi Salim 1602bf825f81SJamal Hadi Salim static inline int xfrm_mark_put(struct sk_buff *skb, struct xfrm_mark *m) 1603bf825f81SJamal Hadi Salim { 1604bf825f81SJamal Hadi Salim if (m->m | m->v) 1605bf825f81SJamal Hadi Salim NLA_PUT(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); 1606bf825f81SJamal Hadi Salim return 0; 1607bf825f81SJamal Hadi Salim 1608bf825f81SJamal Hadi Salim nla_put_failure: 1609bf825f81SJamal Hadi Salim return -1; 1610bf825f81SJamal Hadi Salim } 1611bf825f81SJamal Hadi Salim 16121da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1613