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 391da177e4SLinus Torvalds #define XFRM_ALIGN8(len) (((len) + 7) & ~7) 40b59f45d0SHerbert Xu #define MODULE_ALIAS_XFRM_MODE(family, encap) \ 41b59f45d0SHerbert Xu MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) 42d3d6dd3aSMasahide NAKAMURA #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ 43d3d6dd3aSMasahide NAKAMURA MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) 441da177e4SLinus Torvalds 45558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 4659c9940eSAlexey Dobriyan #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) 4759c9940eSAlexey Dobriyan #define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field) 4859c9940eSAlexey Dobriyan #define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field) 49558f82efSMasahide NAKAMURA #else 5059c9940eSAlexey Dobriyan #define XFRM_INC_STATS(net, field) ((void)(net)) 5159c9940eSAlexey Dobriyan #define XFRM_INC_STATS_BH(net, field) ((void)(net)) 5259c9940eSAlexey Dobriyan #define XFRM_INC_STATS_USER(net, field) ((void)(net)) 53558f82efSMasahide NAKAMURA #endif 54558f82efSMasahide NAKAMURA 554a3e2f71SArjan van de Ven extern struct mutex xfrm_cfg_mutex; 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds /* Organization of SPD aka "XFRM rules" 581da177e4SLinus Torvalds ------------------------------------ 591da177e4SLinus Torvalds 601da177e4SLinus Torvalds Basic objects: 611da177e4SLinus Torvalds - policy rule, struct xfrm_policy (=SPD entry) 621da177e4SLinus Torvalds - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) 631da177e4SLinus Torvalds - instance of a transformer, struct xfrm_state (=SA) 641da177e4SLinus Torvalds - template to clone xfrm_state, struct xfrm_tmpl 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds SPD is plain linear list of xfrm_policy rules, ordered by priority. 671da177e4SLinus Torvalds (To be compatible with existing pfkeyv2 implementations, 681da177e4SLinus Torvalds many rules with priority of 0x7fffffff are allowed to exist and 691da177e4SLinus Torvalds such rules are ordered in an unpredictable way, thanks to bsd folks.) 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds Lookup is plain linear search until the first match with selector. 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds If "action" is "block", then we prohibit the flow, otherwise: 741da177e4SLinus Torvalds if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, 751da177e4SLinus Torvalds policy entry has list of up to XFRM_MAX_DEPTH transformations, 761da177e4SLinus Torvalds described by templates xfrm_tmpl. Each template is resolved 771da177e4SLinus Torvalds to a complete xfrm_state (see below) and we pack bundle of transformations 781da177e4SLinus Torvalds to a dst_entry returned to requestor. 791da177e4SLinus Torvalds 801da177e4SLinus Torvalds dst -. xfrm .-> xfrm_state #1 811da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #2 821da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #3 831da177e4SLinus Torvalds |---. child .-> NULL 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds Bundles are cached at xrfm_policy struct (field ->bundles). 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds Resolution of xrfm_tmpl 891da177e4SLinus Torvalds ----------------------- 901da177e4SLinus Torvalds Template contains: 911da177e4SLinus Torvalds 1. ->mode Mode: transport or tunnel 921da177e4SLinus Torvalds 2. ->id.proto Protocol: AH/ESP/IPCOMP 931da177e4SLinus Torvalds 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. 941da177e4SLinus Torvalds Q: allow to resolve security gateway? 951da177e4SLinus Torvalds 4. ->id.spi If not zero, static SPI. 961da177e4SLinus Torvalds 5. ->saddr Local tunnel endpoint, ignored for transport mode. 971da177e4SLinus Torvalds 6. ->algos List of allowed algos. Plain bitmask now. 981da177e4SLinus Torvalds Q: ealgos, aalgos, calgos. What a mess... 991da177e4SLinus Torvalds 7. ->share Sharing mode. 1001da177e4SLinus Torvalds Q: how to implement private sharing mode? To add struct sock* to 1011da177e4SLinus Torvalds flow id? 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds Having this template we search through SAD searching for entries 1041da177e4SLinus Torvalds with appropriate mode/proto/algo, permitted by selector. 1051da177e4SLinus Torvalds If no appropriate entry found, it is requested from key manager. 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds PROBLEMS: 1081da177e4SLinus Torvalds Q: How to find all the bundles referring to a physical path for 1091da177e4SLinus Torvalds PMTU discovery? Seems, dst should contain list of all parents... 1101da177e4SLinus Torvalds and enter to infinite locking hierarchy disaster. 1111da177e4SLinus Torvalds No! It is easier, we will not search for them, let them find us. 1121da177e4SLinus Torvalds We add genid to each dst plus pointer to genid of raw IP route, 1131da177e4SLinus Torvalds pmtu disc will update pmtu on raw IP route and increase its genid. 1141da177e4SLinus Torvalds dst_check() will see this for top level and trigger resyncing 1151da177e4SLinus Torvalds metrics. Plus, it will be made via sk->sk_dst_cache. Solved. 1161da177e4SLinus Torvalds */ 1171da177e4SLinus Torvalds 11812a169e7SHerbert Xu struct xfrm_state_walk { 11912a169e7SHerbert Xu struct list_head all; 12012a169e7SHerbert Xu u8 state; 12112a169e7SHerbert Xu union { 12212a169e7SHerbert Xu u8 dying; 12312a169e7SHerbert Xu u8 proto; 12412a169e7SHerbert Xu }; 12512a169e7SHerbert Xu u32 seq; 12612a169e7SHerbert Xu }; 12712a169e7SHerbert Xu 1281da177e4SLinus Torvalds /* Full description of state of transformer. */ 129fd2c3ef7SEric Dumazet struct xfrm_state { 130673c09beSAlexey Dobriyan #ifdef CONFIG_NET_NS 131673c09beSAlexey Dobriyan struct net *xs_net; 132673c09beSAlexey Dobriyan #endif 133abb81c4fSHerbert Xu union { 13412a169e7SHerbert Xu struct hlist_node gclist; 1358f126e37SDavid S. Miller struct hlist_node bydst; 136abb81c4fSHerbert Xu }; 1378f126e37SDavid S. Miller struct hlist_node bysrc; 1388f126e37SDavid S. Miller struct hlist_node byspi; 1391da177e4SLinus Torvalds 1401da177e4SLinus Torvalds atomic_t refcnt; 1411da177e4SLinus Torvalds spinlock_t lock; 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds struct xfrm_id id; 1441da177e4SLinus Torvalds struct xfrm_selector sel; 145bf825f81SJamal Hadi Salim struct xfrm_mark mark; 14635d2856bSMartin Willi u32 tfcpad; 1471da177e4SLinus Torvalds 1489d4a706dSDavid S. Miller u32 genid; 1499d4a706dSDavid S. Miller 15012a169e7SHerbert Xu /* Key manager bits */ 15112a169e7SHerbert Xu struct xfrm_state_walk km; 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds /* Parameters of this state. */ 1541da177e4SLinus Torvalds struct { 1551da177e4SLinus Torvalds u32 reqid; 1561da177e4SLinus Torvalds u8 mode; 1571da177e4SLinus Torvalds u8 replay_window; 1581da177e4SLinus Torvalds u8 aalgo, ealgo, calgo; 1591da177e4SLinus Torvalds u8 flags; 1601da177e4SLinus Torvalds u16 family; 1611da177e4SLinus Torvalds xfrm_address_t saddr; 1621da177e4SLinus Torvalds int header_len; 1631da177e4SLinus Torvalds int trailer_len; 1641da177e4SLinus Torvalds } props; 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds /* Data for transformer */ 1694447bb33SMartin Willi struct xfrm_algo_auth *aalg; 1701da177e4SLinus Torvalds struct xfrm_algo *ealg; 1711da177e4SLinus Torvalds struct xfrm_algo *calg; 1721a6509d9SHerbert Xu struct xfrm_algo_aead *aead; 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds /* Data for encapsulator */ 1751da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 1761da177e4SLinus Torvalds 177060f02a3SNoriaki TAKAMIYA /* Data for care-of address */ 178060f02a3SNoriaki TAKAMIYA xfrm_address_t *coaddr; 179060f02a3SNoriaki TAKAMIYA 1801da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1811da177e4SLinus Torvalds struct xfrm_state *tunnel; 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1841da177e4SLinus Torvalds atomic_t tunnel_users; 1851da177e4SLinus Torvalds 1861da177e4SLinus Torvalds /* State for replay detection */ 1871da177e4SLinus Torvalds struct xfrm_replay_state replay; 1881da177e4SLinus Torvalds 189f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 190f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 191f8cd5488SJamal Hadi Salim 1922717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 1932717096aSJamal Hadi Salim * moment 1942717096aSJamal Hadi Salim */ 1952717096aSJamal Hadi Salim u32 xflags; 1962717096aSJamal Hadi Salim 197f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 198f8cd5488SJamal Hadi Salim u32 replay_maxage; 199f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 200f8cd5488SJamal Hadi Salim 201f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 202f8cd5488SJamal Hadi Salim struct timer_list rtimer; 203f8cd5488SJamal Hadi Salim 2041da177e4SLinus Torvalds /* Statistics */ 2051da177e4SLinus Torvalds struct xfrm_stats stats; 2061da177e4SLinus Torvalds 2071da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 2089e0d57fdSYury Polyanskiy struct tasklet_hrtimer mtimer; 2091da177e4SLinus Torvalds 2109afaca05SMasahide NAKAMURA /* Last used time */ 211d26f3984SHerbert Xu unsigned long lastused; 2129afaca05SMasahide NAKAMURA 2131da177e4SLinus Torvalds /* Reference to data common to all the instances of this 2141da177e4SLinus Torvalds * transformer. */ 215533cb5b0SEric Dumazet const struct xfrm_type *type; 21613996378SHerbert Xu struct xfrm_mode *inner_mode; 217df9dcb45SKazunori MIYAZAWA struct xfrm_mode *inner_mode_iaf; 21813996378SHerbert Xu struct xfrm_mode *outer_mode; 2191da177e4SLinus Torvalds 220df71837dSTrent Jaeger /* Security context */ 221df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 222df71837dSTrent Jaeger 2231da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 2241da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 2251da177e4SLinus Torvalds void *data; 2261da177e4SLinus Torvalds }; 2271da177e4SLinus Torvalds 228673c09beSAlexey Dobriyan static inline struct net *xs_net(struct xfrm_state *x) 229673c09beSAlexey Dobriyan { 230673c09beSAlexey Dobriyan return read_pnet(&x->xs_net); 231673c09beSAlexey Dobriyan } 232673c09beSAlexey Dobriyan 2332717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2342717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 2352717096aSJamal Hadi Salim 2361da177e4SLinus Torvalds enum { 2371da177e4SLinus Torvalds XFRM_STATE_VOID, 2381da177e4SLinus Torvalds XFRM_STATE_ACQ, 2391da177e4SLinus Torvalds XFRM_STATE_VALID, 2401da177e4SLinus Torvalds XFRM_STATE_ERROR, 2411da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2421da177e4SLinus Torvalds XFRM_STATE_DEAD 2431da177e4SLinus Torvalds }; 2441da177e4SLinus Torvalds 24526b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 246fd2c3ef7SEric Dumazet struct km_event { 247bf08867fSHerbert Xu union { 248bf08867fSHerbert Xu u32 hard; 249bf08867fSHerbert Xu u32 proto; 250bf08867fSHerbert Xu u32 byid; 251f8cd5488SJamal Hadi Salim u32 aevent; 252f7b6983fSMasahide NAKAMURA u32 type; 253bf08867fSHerbert Xu } data; 254bf08867fSHerbert Xu 25526b15dadSJamal Hadi Salim u32 seq; 25626b15dadSJamal Hadi Salim u32 pid; 25726b15dadSJamal Hadi Salim u32 event; 2587067802eSAlexey Dobriyan struct net *net; 25926b15dadSJamal Hadi Salim }; 26026b15dadSJamal Hadi Salim 26125ee3286SHerbert Xu struct net_device; 2621da177e4SLinus Torvalds struct xfrm_type; 2631da177e4SLinus Torvalds struct xfrm_dst; 2641da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2651da177e4SLinus Torvalds unsigned short family; 2661da177e4SLinus Torvalds struct dst_ops *dst_ops; 267ddcfd796SAlexey Dobriyan void (*garbage_collect)(struct net *net); 268c5b3cf46SAlexey Dobriyan struct dst_entry *(*dst_lookup)(struct net *net, int tos, 269c5b3cf46SAlexey Dobriyan xfrm_address_t *saddr, 27066cdb3caSHerbert Xu xfrm_address_t *daddr); 271fbda33b2SAlexey Dobriyan int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr); 2721da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 273d5422efeSHerbert Xu struct flowi *fl, 274d5422efeSHerbert Xu int reverse); 27525ee3286SHerbert Xu int (*get_tos)(struct flowi *fl); 276a1b05140SMasahide NAKAMURA int (*init_path)(struct xfrm_dst *path, 277a1b05140SMasahide NAKAMURA struct dst_entry *dst, 278a1b05140SMasahide NAKAMURA int nfheader_len); 27925ee3286SHerbert Xu int (*fill_dst)(struct xfrm_dst *xdst, 28087c1e12bSHerbert Xu struct net_device *dev, 28187c1e12bSHerbert Xu struct flowi *fl); 2821da177e4SLinus Torvalds }; 2831da177e4SLinus Torvalds 2841da177e4SLinus Torvalds extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 2851da177e4SLinus Torvalds extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 28626b15dadSJamal Hadi Salim extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); 28726b15dadSJamal Hadi Salim extern void km_state_notify(struct xfrm_state *x, struct km_event *c); 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds struct xfrm_tmpl; 290980ebd25SJamal Hadi Salim extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 29153bc6b4dSJamal Hadi Salim extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); 29253bc6b4dSJamal Hadi Salim extern int __xfrm_state_delete(struct xfrm_state *x); 29353bc6b4dSJamal Hadi Salim 2941da177e4SLinus Torvalds struct xfrm_state_afinfo { 29517c2a42aSHerbert Xu unsigned int family; 29636cf9acfSHerbert Xu unsigned int proto; 2978e3d716cSAl Viro __be16 eth_proto; 29817c2a42aSHerbert Xu struct module *owner; 299533cb5b0SEric Dumazet const struct xfrm_type *type_map[IPPROTO_MAX]; 300aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 301d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 3028444cf71SThomas Egerer void (*init_tempsel)(struct xfrm_selector *sel, struct flowi *fl); 3038444cf71SThomas Egerer void (*init_temprop)(struct xfrm_state *x, struct xfrm_tmpl *tmpl, 3041da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr); 30541a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 30641a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 307cdca7265SMiika Komu int (*output)(struct sk_buff *skb); 308227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 309227620e2SHerbert Xu struct sk_buff *skb); 31036cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 31136cf9acfSHerbert Xu struct sk_buff *skb); 312716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 313716062fdSHerbert Xu int async); 3141da177e4SLinus Torvalds }; 3151da177e4SLinus Torvalds 3161da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 3171da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 3181da177e4SLinus Torvalds 3191da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 3201da177e4SLinus Torvalds 321fd2c3ef7SEric Dumazet struct xfrm_type { 3221da177e4SLinus Torvalds char *description; 3231da177e4SLinus Torvalds struct module *owner; 324a6337463Sjamal u8 proto; 325a6337463Sjamal u8 flags; 3261b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 327436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 328f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 329f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3301da177e4SLinus Torvalds 33172cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 3321da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 333e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3341da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 335df0ba92aSMasahide NAKAMURA int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); 336aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3371da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 338c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3391da177e4SLinus Torvalds }; 3401da177e4SLinus Torvalds 341533cb5b0SEric Dumazet extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 342533cb5b0SEric Dumazet extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 3431da177e4SLinus Torvalds 344b59f45d0SHerbert Xu struct xfrm_mode { 345227620e2SHerbert Xu /* 346227620e2SHerbert Xu * Remove encapsulation header. 347227620e2SHerbert Xu * 348227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 349227620e2SHerbert Xu * header. 350227620e2SHerbert Xu * 351227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 352227620e2SHerbert Xu * should be and the network header shall be set to where the IP 353227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 354227620e2SHerbert Xu * payload. 355227620e2SHerbert Xu */ 356227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 357227620e2SHerbert Xu 358227620e2SHerbert Xu /* 359227620e2SHerbert Xu * This is the actual input entry point. 360227620e2SHerbert Xu * 361227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 362227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 363227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 364227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 365227620e2SHerbert Xu */ 366b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 36737fedd3aSHerbert Xu 36837fedd3aSHerbert Xu /* 36937fedd3aSHerbert Xu * Add encapsulation header. 37037fedd3aSHerbert Xu * 37137fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 37237fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 37337fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 37437fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 37537fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 37637fedd3aSHerbert Xu * header. The value of the network header will always point 37737fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 37837fedd3aSHerbert Xu */ 37936cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 38036cf9acfSHerbert Xu 38136cf9acfSHerbert Xu /* 38236cf9acfSHerbert Xu * This is the actual output entry point. 38336cf9acfSHerbert Xu * 38436cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 38536cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 38636cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 38736cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 38836cf9acfSHerbert Xu * call output2. 38936cf9acfSHerbert Xu */ 390eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 391b59f45d0SHerbert Xu 39217c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 393b59f45d0SHerbert Xu struct module *owner; 394b59f45d0SHerbert Xu unsigned int encap; 3951bfcb10fSHerbert Xu int flags; 3961bfcb10fSHerbert Xu }; 3971bfcb10fSHerbert Xu 3981bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 3991bfcb10fSHerbert Xu enum { 4001bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 401b59f45d0SHerbert Xu }; 402b59f45d0SHerbert Xu 403b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 404b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 405b59f45d0SHerbert Xu 406df9dcb45SKazunori MIYAZAWA static inline int xfrm_af2proto(unsigned int family) 407df9dcb45SKazunori MIYAZAWA { 408df9dcb45SKazunori MIYAZAWA switch(family) { 409df9dcb45SKazunori MIYAZAWA case AF_INET: 410df9dcb45SKazunori MIYAZAWA return IPPROTO_IPIP; 411df9dcb45SKazunori MIYAZAWA case AF_INET6: 412df9dcb45SKazunori MIYAZAWA return IPPROTO_IPV6; 413df9dcb45SKazunori MIYAZAWA default: 414df9dcb45SKazunori MIYAZAWA return 0; 415df9dcb45SKazunori MIYAZAWA } 416df9dcb45SKazunori MIYAZAWA } 417df9dcb45SKazunori MIYAZAWA 418df9dcb45SKazunori MIYAZAWA static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) 419df9dcb45SKazunori MIYAZAWA { 420df9dcb45SKazunori MIYAZAWA if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || 421df9dcb45SKazunori MIYAZAWA (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) 422df9dcb45SKazunori MIYAZAWA return x->inner_mode; 423df9dcb45SKazunori MIYAZAWA else 424df9dcb45SKazunori MIYAZAWA return x->inner_mode_iaf; 425df9dcb45SKazunori MIYAZAWA } 426df9dcb45SKazunori MIYAZAWA 427fd2c3ef7SEric Dumazet struct xfrm_tmpl { 4281da177e4SLinus Torvalds /* id in template is interpreted as: 4291da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 4301da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 4311da177e4SLinus Torvalds * daddr must be fixed too. 4321da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 4331da177e4SLinus Torvalds */ 4341da177e4SLinus Torvalds struct xfrm_id id; 4351da177e4SLinus Torvalds 4361da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 4371da177e4SLinus Torvalds xfrm_address_t saddr; 4381da177e4SLinus Torvalds 43976b3f055SMiika Komu unsigned short encap_family; 44076b3f055SMiika Komu 441a6337463Sjamal u32 reqid; 4421da177e4SLinus Torvalds 4437e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 444a6337463Sjamal u8 mode; 4451da177e4SLinus Torvalds 4461da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 447a6337463Sjamal u8 share; 4481da177e4SLinus Torvalds 4491da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 450a6337463Sjamal u8 optional; 4511da177e4SLinus Torvalds 452c5d18e98SHerbert Xu /* Skip aalgos/ealgos/calgos checks. */ 453a6337463Sjamal u8 allalgs; 454c5d18e98SHerbert Xu 4551da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 456a6337463Sjamal u32 aalgos; 457a6337463Sjamal u32 ealgos; 458a6337463Sjamal u32 calgos; 4591da177e4SLinus Torvalds }; 4601da177e4SLinus Torvalds 461622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 4621da177e4SLinus Torvalds 46312a169e7SHerbert Xu struct xfrm_policy_walk_entry { 46412a169e7SHerbert Xu struct list_head all; 46512a169e7SHerbert Xu u8 dead; 46612a169e7SHerbert Xu }; 46712a169e7SHerbert Xu 46812a169e7SHerbert Xu struct xfrm_policy_walk { 46912a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 47012a169e7SHerbert Xu u8 type; 47112a169e7SHerbert Xu u32 seq; 47212a169e7SHerbert Xu }; 47312a169e7SHerbert Xu 474fd2c3ef7SEric Dumazet struct xfrm_policy { 4750331b1f3SAlexey Dobriyan #ifdef CONFIG_NET_NS 4760331b1f3SAlexey Dobriyan struct net *xp_net; 4770331b1f3SAlexey Dobriyan #endif 4782518c7c2SDavid S. Miller struct hlist_node bydst; 4792518c7c2SDavid S. Miller struct hlist_node byidx; 4801da177e4SLinus Torvalds 4811da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 4821da177e4SLinus Torvalds rwlock_t lock; 4831da177e4SLinus Torvalds atomic_t refcnt; 4841da177e4SLinus Torvalds struct timer_list timer; 4851da177e4SLinus Torvalds 486fe1a5f03STimo Teräs struct flow_cache_object flo; 48780c802f3STimo Teräs atomic_t genid; 4881da177e4SLinus Torvalds u32 priority; 4891da177e4SLinus Torvalds u32 index; 490bf825f81SJamal Hadi Salim struct xfrm_mark mark; 4911da177e4SLinus Torvalds struct xfrm_selector selector; 4921da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 4931da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 49412a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 49546ca5f5dSArnaldo Carvalho de Melo u8 type; 49646ca5f5dSArnaldo Carvalho de Melo u8 action; 49746ca5f5dSArnaldo Carvalho de Melo u8 flags; 49846ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 49912a169e7SHerbert Xu u16 family; 500df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 5011da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 5021da177e4SLinus Torvalds }; 5031da177e4SLinus Torvalds 5040331b1f3SAlexey Dobriyan static inline struct net *xp_net(struct xfrm_policy *xp) 5050331b1f3SAlexey Dobriyan { 5060331b1f3SAlexey Dobriyan return read_pnet(&xp->xp_net); 5070331b1f3SAlexey Dobriyan } 5080331b1f3SAlexey Dobriyan 50913c1d189SArnaud Ebalard struct xfrm_kmaddress { 51013c1d189SArnaud Ebalard xfrm_address_t local; 51113c1d189SArnaud Ebalard xfrm_address_t remote; 51213c1d189SArnaud Ebalard u32 reserved; 51313c1d189SArnaud Ebalard u16 family; 51413c1d189SArnaud Ebalard }; 51513c1d189SArnaud Ebalard 51680c9abaaSShinta Sugimoto struct xfrm_migrate { 51780c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 51880c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 51980c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 52080c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 52180c9abaaSShinta Sugimoto u8 proto; 52280c9abaaSShinta Sugimoto u8 mode; 52380c9abaaSShinta Sugimoto u16 reserved; 52480c9abaaSShinta Sugimoto u32 reqid; 52580c9abaaSShinta Sugimoto u16 old_family; 52680c9abaaSShinta Sugimoto u16 new_family; 52780c9abaaSShinta Sugimoto }; 52880c9abaaSShinta Sugimoto 5291da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 530f8cd5488SJamal Hadi Salim /* which seqno */ 531f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 532f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 533f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 534f8cd5488SJamal Hadi Salim /* what happened */ 535f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 536f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 537f8cd5488SJamal Hadi Salim 538f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 539f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 540f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 541f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 542f8cd5488SJamal Hadi Salim /* default seq threshold size */ 543f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 5441da177e4SLinus Torvalds 545fd2c3ef7SEric Dumazet struct xfrm_mgr { 5461da177e4SLinus Torvalds struct list_head list; 5471da177e4SLinus Torvalds char *id; 54826b15dadSJamal Hadi Salim int (*notify)(struct xfrm_state *x, struct km_event *c); 5491da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 550cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 5515d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 55226b15dadSJamal Hadi Salim int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); 553db983c11SAlexey Dobriyan int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 55413c1d189SArnaud Ebalard int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles, struct xfrm_kmaddress *k); 5551da177e4SLinus Torvalds }; 5561da177e4SLinus Torvalds 5571da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 5581da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 5591da177e4SLinus Torvalds 560436a0a40SHerbert Xu /* 561436a0a40SHerbert Xu * This structure is used for the duration where packets are being 562436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 563436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 564436a0a40SHerbert Xu */ 565436a0a40SHerbert Xu struct xfrm_skb_cb { 566436a0a40SHerbert Xu union { 567436a0a40SHerbert Xu struct inet_skb_parm h4; 568436a0a40SHerbert Xu struct inet6_skb_parm h6; 569436a0a40SHerbert Xu } header; 570436a0a40SHerbert Xu 571436a0a40SHerbert Xu /* Sequence number for replay protection. */ 572b318e0e4SHerbert Xu union { 573b318e0e4SHerbert Xu u64 output; 574b318e0e4SHerbert Xu __be32 input; 575b318e0e4SHerbert Xu } seq; 576436a0a40SHerbert Xu }; 577436a0a40SHerbert Xu 578436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 579436a0a40SHerbert Xu 58036cf9acfSHerbert Xu /* 58136cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 58236cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 58336cf9acfSHerbert Xu */ 58436cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 58536cf9acfSHerbert Xu union { 58636cf9acfSHerbert Xu struct inet_skb_parm h4; 58736cf9acfSHerbert Xu struct inet6_skb_parm h6; 58836cf9acfSHerbert Xu } header; 58936cf9acfSHerbert Xu 59036cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 59136cf9acfSHerbert Xu __be16 id; 59236cf9acfSHerbert Xu __be16 frag_off; 59336cf9acfSHerbert Xu 594732c8bd5SHerbert Xu /* IP header length (excluding options or extension headers). */ 595732c8bd5SHerbert Xu u8 ihl; 596732c8bd5SHerbert Xu 59736cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 59836cf9acfSHerbert Xu u8 tos; 59936cf9acfSHerbert Xu 60036cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 60136cf9acfSHerbert Xu u8 ttl; 60236cf9acfSHerbert Xu 60336cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 60436cf9acfSHerbert Xu u8 protocol; 60536cf9acfSHerbert Xu 606732c8bd5SHerbert Xu /* Option length for IPv4, zero for IPv6. */ 607732c8bd5SHerbert Xu u8 optlen; 608732c8bd5SHerbert Xu 60936cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 61036cf9acfSHerbert Xu u8 flow_lbl[3]; 61136cf9acfSHerbert Xu }; 61236cf9acfSHerbert Xu 61336cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 61436cf9acfSHerbert Xu 615716062fdSHerbert Xu /* 616716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 617716062fdSHerbert Xu * related information. 618716062fdSHerbert Xu */ 619716062fdSHerbert Xu struct xfrm_spi_skb_cb { 620716062fdSHerbert Xu union { 621716062fdSHerbert Xu struct inet_skb_parm h4; 622716062fdSHerbert Xu struct inet6_skb_parm h6; 623716062fdSHerbert Xu } header; 624716062fdSHerbert Xu 625716062fdSHerbert Xu unsigned int daddroff; 6262fcb45b6SHerbert Xu unsigned int family; 627716062fdSHerbert Xu }; 628716062fdSHerbert Xu 629716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 630716062fdSHerbert Xu 631161a09e7SJoy Latten /* Audit Information */ 632fd2c3ef7SEric Dumazet struct xfrm_audit { 633161a09e7SJoy Latten u32 secid; 6342532386fSEric Paris uid_t loginuid; 6352532386fSEric Paris u32 sessionid; 636161a09e7SJoy Latten }; 637c9204d9cSJoy Latten 638c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 639afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 640ab5f5e8bSJoy Latten { 641ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 642ab5f5e8bSJoy Latten 643afeb14b4SPaul Moore if (audit_enabled == 0) 644afeb14b4SPaul Moore return NULL; 645ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 646ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 647ab5f5e8bSJoy Latten if (audit_buf == NULL) 648ab5f5e8bSJoy Latten return NULL; 649afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 650afeb14b4SPaul Moore return audit_buf; 651afeb14b4SPaul Moore } 652afeb14b4SPaul Moore 6532532386fSEric Paris static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid, 654afeb14b4SPaul Moore struct audit_buffer *audit_buf) 655afeb14b4SPaul Moore { 656afeb14b4SPaul Moore char *secctx; 657afeb14b4SPaul Moore u32 secctx_len; 658ab5f5e8bSJoy Latten 6592532386fSEric Paris audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); 66068277accSPaul Moore if (secid != 0 && 66168277accSPaul Moore security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { 662ab5f5e8bSJoy Latten audit_log_format(audit_buf, " subj=%s", secctx); 663ab5f5e8bSJoy Latten security_release_secctx(secctx, secctx_len); 664ab5f5e8bSJoy Latten } else 665ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 666ab5f5e8bSJoy Latten } 667ab5f5e8bSJoy Latten 668ab5f5e8bSJoy Latten extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 6692532386fSEric Paris u32 auid, u32 ses, u32 secid); 670ab5f5e8bSJoy Latten extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 6712532386fSEric Paris u32 auid, u32 ses, u32 secid); 672ab5f5e8bSJoy Latten extern void xfrm_audit_state_add(struct xfrm_state *x, int result, 6732532386fSEric Paris u32 auid, u32 ses, u32 secid); 674ab5f5e8bSJoy Latten extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, 6752532386fSEric Paris u32 auid, u32 ses, u32 secid); 676afeb14b4SPaul Moore extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 677afeb14b4SPaul Moore struct sk_buff *skb); 678afeb14b4SPaul Moore extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 679afeb14b4SPaul Moore extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 680afeb14b4SPaul Moore __be32 net_spi, __be32 net_seq); 681afeb14b4SPaul Moore extern void xfrm_audit_state_icvfail(struct xfrm_state *x, 682afeb14b4SPaul Moore struct sk_buff *skb, u8 proto); 683c9204d9cSJoy Latten #else 68441fef0eeSMarcin Slusarz 68541fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 68641fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 68741fef0eeSMarcin Slusarz { 68841fef0eeSMarcin Slusarz } 68941fef0eeSMarcin Slusarz 69041fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 69141fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 69241fef0eeSMarcin Slusarz { 69341fef0eeSMarcin Slusarz } 69441fef0eeSMarcin Slusarz 69541fef0eeSMarcin Slusarz static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, 69641fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 69741fef0eeSMarcin Slusarz { 69841fef0eeSMarcin Slusarz } 69941fef0eeSMarcin Slusarz 70041fef0eeSMarcin Slusarz static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, 70141fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 70241fef0eeSMarcin Slusarz { 70341fef0eeSMarcin Slusarz } 70441fef0eeSMarcin Slusarz 70541fef0eeSMarcin Slusarz static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 70641fef0eeSMarcin Slusarz struct sk_buff *skb) 70741fef0eeSMarcin Slusarz { 70841fef0eeSMarcin Slusarz } 70941fef0eeSMarcin Slusarz 71041fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, 71141fef0eeSMarcin Slusarz u16 family) 71241fef0eeSMarcin Slusarz { 71341fef0eeSMarcin Slusarz } 71441fef0eeSMarcin Slusarz 71541fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 71641fef0eeSMarcin Slusarz __be32 net_spi, __be32 net_seq) 71741fef0eeSMarcin Slusarz { 71841fef0eeSMarcin Slusarz } 71941fef0eeSMarcin Slusarz 72041fef0eeSMarcin Slusarz static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, 72141fef0eeSMarcin Slusarz struct sk_buff *skb, u8 proto) 72241fef0eeSMarcin Slusarz { 72341fef0eeSMarcin Slusarz } 724c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 725161a09e7SJoy Latten 7261da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 7271da177e4SLinus Torvalds { 7281da177e4SLinus Torvalds if (likely(policy != NULL)) 7291da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 7301da177e4SLinus Torvalds } 7311da177e4SLinus Torvalds 73264c31b3fSWANG Cong extern void xfrm_policy_destroy(struct xfrm_policy *policy); 7331da177e4SLinus Torvalds 7341da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 7351da177e4SLinus Torvalds { 7361da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 73764c31b3fSWANG Cong xfrm_policy_destroy(policy); 7381da177e4SLinus Torvalds } 7391da177e4SLinus Torvalds 7404e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7414e81bb83SMasahide NAKAMURA { 7424e81bb83SMasahide NAKAMURA int i; 7434e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 7444e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 7454e81bb83SMasahide NAKAMURA } 7464e81bb83SMasahide NAKAMURA 7471da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 7481da177e4SLinus Torvalds 74921380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 75021380b81SHerbert Xu { 75121380b81SHerbert Xu atomic_dec(&x->refcnt); 75221380b81SHerbert Xu } 75321380b81SHerbert Xu 7541da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 7551da177e4SLinus Torvalds { 7561da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 7571da177e4SLinus Torvalds __xfrm_state_destroy(x); 7581da177e4SLinus Torvalds } 7591da177e4SLinus Torvalds 7601da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 7611da177e4SLinus Torvalds { 7621da177e4SLinus Torvalds atomic_inc(&x->refcnt); 7631da177e4SLinus Torvalds } 7641da177e4SLinus Torvalds 7651da177e4SLinus Torvalds static __inline__ int addr_match(void *token1, void *token2, int prefixlen) 7661da177e4SLinus Torvalds { 7675f19343fSAl Viro __be32 *a1 = token1; 7685f19343fSAl Viro __be32 *a2 = token2; 7691da177e4SLinus Torvalds int pdw; 7701da177e4SLinus Torvalds int pbi; 7711da177e4SLinus Torvalds 772a6337463Sjamal pdw = prefixlen >> 5; /* num of whole u32 in prefix */ 7731da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 7741da177e4SLinus Torvalds 7751da177e4SLinus Torvalds if (pdw) 7761da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 7771da177e4SLinus Torvalds return 0; 7781da177e4SLinus Torvalds 7791da177e4SLinus Torvalds if (pbi) { 7805f19343fSAl Viro __be32 mask; 7811da177e4SLinus Torvalds 7821da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 7831da177e4SLinus Torvalds 7841da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 7851da177e4SLinus Torvalds return 0; 7861da177e4SLinus Torvalds } 7871da177e4SLinus Torvalds 7881da177e4SLinus Torvalds return 1; 7891da177e4SLinus Torvalds } 7901da177e4SLinus Torvalds 7911da177e4SLinus Torvalds static __inline__ 792f9d07e41SAl Viro __be16 xfrm_flowi_sport(struct flowi *fl) 7931da177e4SLinus Torvalds { 794f9d07e41SAl Viro __be16 port; 7951da177e4SLinus Torvalds switch(fl->proto) { 7961da177e4SLinus Torvalds case IPPROTO_TCP: 7971da177e4SLinus Torvalds case IPPROTO_UDP: 798ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 7991da177e4SLinus Torvalds case IPPROTO_SCTP: 8001da177e4SLinus Torvalds port = fl->fl_ip_sport; 8011da177e4SLinus Torvalds break; 8021da177e4SLinus Torvalds case IPPROTO_ICMP: 8031da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8041da177e4SLinus Torvalds port = htons(fl->fl_icmp_type); 8051da177e4SLinus Torvalds break; 8062ce4272aSMasahide NAKAMURA case IPPROTO_MH: 8072ce4272aSMasahide NAKAMURA port = htons(fl->fl_mh_type); 8082ce4272aSMasahide NAKAMURA break; 809cc9ff19dSTimo Teräs case IPPROTO_GRE: 810aa285b17STimo Teräs port = htons(ntohl(fl->fl_gre_key) >> 16); 811cc9ff19dSTimo Teräs break; 8121da177e4SLinus Torvalds default: 8131da177e4SLinus Torvalds port = 0; /*XXX*/ 8141da177e4SLinus Torvalds } 8151da177e4SLinus Torvalds return port; 8161da177e4SLinus Torvalds } 8171da177e4SLinus Torvalds 8181da177e4SLinus Torvalds static __inline__ 819f9d07e41SAl Viro __be16 xfrm_flowi_dport(struct flowi *fl) 8201da177e4SLinus Torvalds { 821f9d07e41SAl Viro __be16 port; 8221da177e4SLinus Torvalds switch(fl->proto) { 8231da177e4SLinus Torvalds case IPPROTO_TCP: 8241da177e4SLinus Torvalds case IPPROTO_UDP: 825ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8261da177e4SLinus Torvalds case IPPROTO_SCTP: 8271da177e4SLinus Torvalds port = fl->fl_ip_dport; 8281da177e4SLinus Torvalds break; 8291da177e4SLinus Torvalds case IPPROTO_ICMP: 8301da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8311da177e4SLinus Torvalds port = htons(fl->fl_icmp_code); 8321da177e4SLinus Torvalds break; 833cc9ff19dSTimo Teräs case IPPROTO_GRE: 834aa285b17STimo Teräs port = htons(ntohl(fl->fl_gre_key) & 0xffff); 835cc9ff19dSTimo Teräs break; 8361da177e4SLinus Torvalds default: 8371da177e4SLinus Torvalds port = 0; /*XXX*/ 8381da177e4SLinus Torvalds } 8391da177e4SLinus Torvalds return port; 8401da177e4SLinus Torvalds } 8411da177e4SLinus Torvalds 84277681021SAndrew Morton extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, 84377681021SAndrew Morton unsigned short family); 8441da177e4SLinus Torvalds 845df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 846df71837dSTrent Jaeger /* If neither has a context --> match 847df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 848df71837dSTrent Jaeger */ 849df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 850df71837dSTrent Jaeger { 851df71837dSTrent Jaeger return ((!s1 && !s2) || 852df71837dSTrent Jaeger (s1 && s2 && 853df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 854df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 855df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 856df71837dSTrent Jaeger } 857df71837dSTrent Jaeger #else 858df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 859df71837dSTrent Jaeger { 860df71837dSTrent Jaeger return 1; 861df71837dSTrent Jaeger } 862df71837dSTrent Jaeger #endif 863df71837dSTrent Jaeger 8641da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 8651da177e4SLinus Torvalds * 8661da177e4SLinus Torvalds * dst->child points to the next element of bundle. 8671da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 8681da177e4SLinus Torvalds * 8691da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 8701da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 8711da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 8721da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 8731da177e4SLinus Torvalds * policy rule. 8741da177e4SLinus Torvalds */ 875fd2c3ef7SEric Dumazet struct xfrm_dst { 8761da177e4SLinus Torvalds union { 8771da177e4SLinus Torvalds struct dst_entry dst; 8781da177e4SLinus Torvalds struct rtable rt; 8791da177e4SLinus Torvalds struct rt6_info rt6; 8801da177e4SLinus Torvalds } u; 8811da177e4SLinus Torvalds struct dst_entry *route; 88280c802f3STimo Teräs struct flow_cache_object flo; 88380c802f3STimo Teräs struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; 88480c802f3STimo Teräs int num_pols, num_xfrms; 885157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 886157bfc25SMasahide NAKAMURA struct flowi *origin; 887157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 888157bfc25SMasahide NAKAMURA #endif 88980c802f3STimo Teräs u32 xfrm_genid; 89080c802f3STimo Teräs u32 policy_genid; 8911da177e4SLinus Torvalds u32 route_mtu_cached; 8921da177e4SLinus Torvalds u32 child_mtu_cached; 89392d63decSHideaki YOSHIFUJI u32 route_cookie; 89492d63decSHideaki YOSHIFUJI u32 path_cookie; 8951da177e4SLinus Torvalds }; 8961da177e4SLinus Torvalds 897def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 898aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 899aabc9761SHerbert Xu { 90080c802f3STimo Teräs xfrm_pols_put(xdst->pols, xdst->num_pols); 901aabc9761SHerbert Xu dst_release(xdst->route); 902aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 903aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 904157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 905157bfc25SMasahide NAKAMURA kfree(xdst->origin); 906157bfc25SMasahide NAKAMURA xdst->origin = NULL; 907157bfc25SMasahide NAKAMURA kfree(xdst->partner); 908157bfc25SMasahide NAKAMURA xdst->partner = NULL; 909157bfc25SMasahide NAKAMURA #endif 910aabc9761SHerbert Xu } 911def8b4faSAlexey Dobriyan #endif 912aabc9761SHerbert Xu 913aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 914aabc9761SHerbert Xu 915fd2c3ef7SEric Dumazet struct sec_path { 9161da177e4SLinus Torvalds atomic_t refcnt; 9171da177e4SLinus Torvalds int len; 918dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 9191da177e4SLinus Torvalds }; 9201da177e4SLinus Torvalds 9211da177e4SLinus Torvalds static inline struct sec_path * 9221da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 9231da177e4SLinus Torvalds { 9241da177e4SLinus Torvalds if (sp) 9251da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 9261da177e4SLinus Torvalds return sp; 9271da177e4SLinus Torvalds } 9281da177e4SLinus Torvalds 9291da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 9301da177e4SLinus Torvalds 9311da177e4SLinus Torvalds static inline void 9321da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 9331da177e4SLinus Torvalds { 9341da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 9351da177e4SLinus Torvalds __secpath_destroy(sp); 9361da177e4SLinus Torvalds } 9371da177e4SLinus Torvalds 9381da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 9391da177e4SLinus Torvalds 9401da177e4SLinus Torvalds static inline void 9411da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 9421da177e4SLinus Torvalds { 9431da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9441da177e4SLinus Torvalds secpath_put(skb->sp); 9451da177e4SLinus Torvalds skb->sp = NULL; 9461da177e4SLinus Torvalds #endif 9471da177e4SLinus Torvalds } 9481da177e4SLinus Torvalds 9491da177e4SLinus Torvalds static inline int 950a1e59abfSPatrick McHardy xfrm_addr_any(xfrm_address_t *addr, unsigned short family) 951a1e59abfSPatrick McHardy { 952a1e59abfSPatrick McHardy switch (family) { 953a1e59abfSPatrick McHardy case AF_INET: 954a1e59abfSPatrick McHardy return addr->a4 == 0; 955a1e59abfSPatrick McHardy case AF_INET6: 956a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 957a1e59abfSPatrick McHardy } 958a1e59abfSPatrick McHardy return 0; 959a1e59abfSPatrick McHardy } 960a1e59abfSPatrick McHardy 961a1e59abfSPatrick McHardy static inline int 9621da177e4SLinus Torvalds __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 9631da177e4SLinus Torvalds { 9641da177e4SLinus Torvalds return (tmpl->saddr.a4 && 9651da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 9661da177e4SLinus Torvalds } 9671da177e4SLinus Torvalds 9681da177e4SLinus Torvalds static inline int 9691da177e4SLinus Torvalds __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 9701da177e4SLinus Torvalds { 9711da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 9721da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 9731da177e4SLinus Torvalds } 9741da177e4SLinus Torvalds 9751da177e4SLinus Torvalds static inline int 9761da177e4SLinus Torvalds xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) 9771da177e4SLinus Torvalds { 9781da177e4SLinus Torvalds switch (family) { 9791da177e4SLinus Torvalds case AF_INET: 9801da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 9811da177e4SLinus Torvalds case AF_INET6: 9821da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 9831da177e4SLinus Torvalds } 9841da177e4SLinus Torvalds return !0; 9851da177e4SLinus Torvalds } 9861da177e4SLinus Torvalds 9871da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9881da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 9891da177e4SLinus Torvalds 990d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 991d5422efeSHerbert Xu struct sk_buff *skb, 992d5422efeSHerbert Xu unsigned int family, int reverse) 9931da177e4SLinus Torvalds { 994f6e1e25dSAlexey Dobriyan struct net *net = dev_net(skb->dev); 995d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 996d5422efeSHerbert Xu 9971da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 998d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 9991da177e4SLinus Torvalds 1000f6e1e25dSAlexey Dobriyan return (!net->xfrm.policy_count[dir] && !skb->sp) || 1001adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOPOLICY) || 1002d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 1003d5422efeSHerbert Xu } 1004d5422efeSHerbert Xu 1005d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 1006d5422efeSHerbert Xu { 1007d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 10081da177e4SLinus Torvalds } 10091da177e4SLinus Torvalds 10101da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10111da177e4SLinus Torvalds { 10121da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 10131da177e4SLinus Torvalds } 10141da177e4SLinus Torvalds 10151da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10161da177e4SLinus Torvalds { 10171da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 10181da177e4SLinus Torvalds } 10191da177e4SLinus Torvalds 1020d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1021d5422efeSHerbert Xu struct sk_buff *skb) 1022d5422efeSHerbert Xu { 1023d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 1024d5422efeSHerbert Xu } 1025d5422efeSHerbert Xu 1026d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1027d5422efeSHerbert Xu struct sk_buff *skb) 1028d5422efeSHerbert Xu { 1029d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 1030d5422efeSHerbert Xu } 1031d5422efeSHerbert Xu 1032d5422efeSHerbert Xu extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1033d5422efeSHerbert Xu unsigned int family, int reverse); 1034d5422efeSHerbert Xu 1035d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1036d5422efeSHerbert Xu unsigned int family) 1037d5422efeSHerbert Xu { 1038d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 1039d5422efeSHerbert Xu } 1040d5422efeSHerbert Xu 1041d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1042d5422efeSHerbert Xu struct flowi *fl, 1043d5422efeSHerbert Xu unsigned int family) 1044d5422efeSHerbert Xu { 1045d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 1046d5422efeSHerbert Xu } 1047d5422efeSHerbert Xu 10481da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 10491da177e4SLinus Torvalds 10501da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 10511da177e4SLinus Torvalds { 105299a66657SAlexey Dobriyan struct net *net = dev_net(skb->dev); 105399a66657SAlexey Dobriyan 105499a66657SAlexey Dobriyan return !net->xfrm.policy_count[XFRM_POLICY_OUT] || 1055adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOXFRM) || 10561da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 10571da177e4SLinus Torvalds } 10581da177e4SLinus Torvalds 10591da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 10601da177e4SLinus Torvalds { 10611da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 10621da177e4SLinus Torvalds } 10631da177e4SLinus Torvalds 10641da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 10651da177e4SLinus Torvalds { 10661da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 10671da177e4SLinus Torvalds } 10681da177e4SLinus Torvalds 10691da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 10701da177e4SLinus Torvalds 10711da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 10721da177e4SLinus Torvalds { 10731da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 10741da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 10751da177e4SLinus Torvalds return 0; 10761da177e4SLinus Torvalds } 10771da177e4SLinus Torvalds 10784666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 10791da177e4SLinus Torvalds 10801da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 10811da177e4SLinus Torvalds { 10821da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 10831da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 10841da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 10851da177e4SLinus Torvalds } 10861da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 10871da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 10881da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 10891da177e4SLinus Torvalds } 10901da177e4SLinus Torvalds } 10911da177e4SLinus Torvalds 10921da177e4SLinus Torvalds #else 10931da177e4SLinus Torvalds 10941da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 10951da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 10961da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 10971da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 10981da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10991da177e4SLinus Torvalds { 11001da177e4SLinus Torvalds return 1; 11011da177e4SLinus Torvalds } 11021da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11031da177e4SLinus Torvalds { 11041da177e4SLinus Torvalds return 1; 11051da177e4SLinus Torvalds } 11061da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 11071da177e4SLinus Torvalds { 11081da177e4SLinus Torvalds return 1; 11091da177e4SLinus Torvalds } 1110d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1111d5422efeSHerbert Xu struct flowi *fl, 1112d5422efeSHerbert Xu unsigned int family) 1113d5422efeSHerbert Xu { 1114d5422efeSHerbert Xu return -ENOSYS; 1115d5422efeSHerbert Xu } 1116d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1117d5422efeSHerbert Xu struct sk_buff *skb) 1118d5422efeSHerbert Xu { 1119d5422efeSHerbert Xu return 1; 1120d5422efeSHerbert Xu } 1121d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1122d5422efeSHerbert Xu struct sk_buff *skb) 1123d5422efeSHerbert Xu { 1124d5422efeSHerbert Xu return 1; 1125d5422efeSHerbert Xu } 11261da177e4SLinus Torvalds #endif 11271da177e4SLinus Torvalds 11281da177e4SLinus Torvalds static __inline__ 11291da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) 11301da177e4SLinus Torvalds { 11311da177e4SLinus Torvalds switch (family){ 11321da177e4SLinus Torvalds case AF_INET: 11331da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_dst; 11341da177e4SLinus Torvalds case AF_INET6: 11351da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_dst; 11361da177e4SLinus Torvalds } 11371da177e4SLinus Torvalds return NULL; 11381da177e4SLinus Torvalds } 11391da177e4SLinus Torvalds 11401da177e4SLinus Torvalds static __inline__ 11411da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) 11421da177e4SLinus Torvalds { 11431da177e4SLinus Torvalds switch (family){ 11441da177e4SLinus Torvalds case AF_INET: 11451da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_src; 11461da177e4SLinus Torvalds case AF_INET6: 11471da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_src; 11481da177e4SLinus Torvalds } 11491da177e4SLinus Torvalds return NULL; 11501da177e4SLinus Torvalds } 11511da177e4SLinus Torvalds 11529bb182a7SYOSHIFUJI Hideaki static __inline__ 11539bb182a7SYOSHIFUJI Hideaki void xfrm_flowi_addr_get(struct flowi *fl, 11549bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 11559bb182a7SYOSHIFUJI Hideaki unsigned short family) 11569bb182a7SYOSHIFUJI Hideaki { 11579bb182a7SYOSHIFUJI Hideaki switch(family) { 11589bb182a7SYOSHIFUJI Hideaki case AF_INET: 11599bb182a7SYOSHIFUJI Hideaki memcpy(&saddr->a4, &fl->fl4_src, sizeof(saddr->a4)); 11609bb182a7SYOSHIFUJI Hideaki memcpy(&daddr->a4, &fl->fl4_dst, sizeof(daddr->a4)); 11619bb182a7SYOSHIFUJI Hideaki break; 11629bb182a7SYOSHIFUJI Hideaki case AF_INET6: 11639bb182a7SYOSHIFUJI Hideaki ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->fl6_src); 11649bb182a7SYOSHIFUJI Hideaki ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->fl6_dst); 11659bb182a7SYOSHIFUJI Hideaki break; 11669bb182a7SYOSHIFUJI Hideaki } 11679bb182a7SYOSHIFUJI Hideaki } 11689bb182a7SYOSHIFUJI Hideaki 11691da177e4SLinus Torvalds static __inline__ int 11701da177e4SLinus Torvalds __xfrm4_state_addr_check(struct xfrm_state *x, 11711da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 11721da177e4SLinus Torvalds { 11731da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 11741da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 11751da177e4SLinus Torvalds return 1; 11761da177e4SLinus Torvalds return 0; 11771da177e4SLinus Torvalds } 11781da177e4SLinus Torvalds 11791da177e4SLinus Torvalds static __inline__ int 11801da177e4SLinus Torvalds __xfrm6_state_addr_check(struct xfrm_state *x, 11811da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 11821da177e4SLinus Torvalds { 11831da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 11841da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 11851da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 11861da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 11871da177e4SLinus Torvalds return 1; 11881da177e4SLinus Torvalds return 0; 11891da177e4SLinus Torvalds } 11901da177e4SLinus Torvalds 11911da177e4SLinus Torvalds static __inline__ int 11921da177e4SLinus Torvalds xfrm_state_addr_check(struct xfrm_state *x, 11931da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 11941da177e4SLinus Torvalds unsigned short family) 11951da177e4SLinus Torvalds { 11961da177e4SLinus Torvalds switch (family) { 11971da177e4SLinus Torvalds case AF_INET: 11981da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 11991da177e4SLinus Torvalds case AF_INET6: 12001da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 12011da177e4SLinus Torvalds } 12021da177e4SLinus Torvalds return 0; 12031da177e4SLinus Torvalds } 12041da177e4SLinus Torvalds 1205e53820deSMasahide NAKAMURA static __inline__ int 1206e53820deSMasahide NAKAMURA xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, 1207e53820deSMasahide NAKAMURA unsigned short family) 1208e53820deSMasahide NAKAMURA { 1209e53820deSMasahide NAKAMURA switch (family) { 1210e53820deSMasahide NAKAMURA case AF_INET: 1211e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 1212e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_dst, 1213e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_src); 1214e53820deSMasahide NAKAMURA case AF_INET6: 1215e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 1216e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_dst, 1217e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_src); 1218e53820deSMasahide NAKAMURA } 1219e53820deSMasahide NAKAMURA return 0; 1220e53820deSMasahide NAKAMURA } 1221e53820deSMasahide NAKAMURA 12221da177e4SLinus Torvalds static inline int xfrm_state_kern(struct xfrm_state *x) 12231da177e4SLinus Torvalds { 12241da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 12251da177e4SLinus Torvalds } 12261da177e4SLinus Torvalds 12275794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 12285794708fSMasahide NAKAMURA { 1229dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1230dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1231dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1232dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 12335794708fSMasahide NAKAMURA } 12345794708fSMasahide NAKAMURA 12351da177e4SLinus Torvalds /* 12361da177e4SLinus Torvalds * xfrm algorithm information 12371da177e4SLinus Torvalds */ 12381a6509d9SHerbert Xu struct xfrm_algo_aead_info { 12391a6509d9SHerbert Xu u16 icv_truncbits; 12401a6509d9SHerbert Xu }; 12411a6509d9SHerbert Xu 12421da177e4SLinus Torvalds struct xfrm_algo_auth_info { 12431da177e4SLinus Torvalds u16 icv_truncbits; 12441da177e4SLinus Torvalds u16 icv_fullbits; 12451da177e4SLinus Torvalds }; 12461da177e4SLinus Torvalds 12471da177e4SLinus Torvalds struct xfrm_algo_encr_info { 12481da177e4SLinus Torvalds u16 blockbits; 12491da177e4SLinus Torvalds u16 defkeybits; 12501da177e4SLinus Torvalds }; 12511da177e4SLinus Torvalds 12521da177e4SLinus Torvalds struct xfrm_algo_comp_info { 12531da177e4SLinus Torvalds u16 threshold; 12541da177e4SLinus Torvalds }; 12551da177e4SLinus Torvalds 12561da177e4SLinus Torvalds struct xfrm_algo_desc { 12571da177e4SLinus Torvalds char *name; 125804ff1260SHerbert Xu char *compat; 12591da177e4SLinus Torvalds u8 available:1; 12601da177e4SLinus Torvalds union { 12611a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 12621da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 12631da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 12641da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 12651da177e4SLinus Torvalds } uinfo; 12661da177e4SLinus Torvalds struct sadb_alg desc; 12671da177e4SLinus Torvalds }; 12681da177e4SLinus Torvalds 12691da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 12701da177e4SLinus Torvalds struct xfrm_tunnel { 12711da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1272a6337463Sjamal int (*err_handler)(struct sk_buff *skb, u32 info); 1273d2acc347SHerbert Xu 1274b33eab08SEric Dumazet struct xfrm_tunnel __rcu *next; 1275d2acc347SHerbert Xu int priority; 12761da177e4SLinus Torvalds }; 12771da177e4SLinus Torvalds 12781da177e4SLinus Torvalds struct xfrm6_tunnel { 1279d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1280d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 1281d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info); 12826f0bcf15SEric Dumazet struct xfrm6_tunnel __rcu *next; 1283d2acc347SHerbert Xu int priority; 12841da177e4SLinus Torvalds }; 12851da177e4SLinus Torvalds 12861da177e4SLinus Torvalds extern void xfrm_init(void); 1287a33bc5c1SNeil Horman extern void xfrm4_init(int rt_hash_size); 1288d62ddc21SAlexey Dobriyan extern int xfrm_state_init(struct net *net); 1289d62ddc21SAlexey Dobriyan extern void xfrm_state_fini(struct net *net); 12901da177e4SLinus Torvalds extern void xfrm4_state_init(void); 1291c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1292c35b7e72SDaniel Lezcano extern int xfrm6_init(void); 1293c35b7e72SDaniel Lezcano extern void xfrm6_fini(void); 12940013cabaSDaniel Lezcano extern int xfrm6_state_init(void); 12951da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 1296c35b7e72SDaniel Lezcano #else 1297c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1298c35b7e72SDaniel Lezcano { 1299c35b7e72SDaniel Lezcano return 0; 1300c35b7e72SDaniel Lezcano } 1301c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1302c35b7e72SDaniel Lezcano { 1303c35b7e72SDaniel Lezcano ; 1304c35b7e72SDaniel Lezcano } 1305c35b7e72SDaniel Lezcano #endif 13061da177e4SLinus Torvalds 1307558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1308c68cd1a0SAlexey Dobriyan extern int xfrm_proc_init(struct net *net); 1309c68cd1a0SAlexey Dobriyan extern void xfrm_proc_fini(struct net *net); 1310558f82efSMasahide NAKAMURA #endif 1311558f82efSMasahide NAKAMURA 1312b27aeadbSAlexey Dobriyan extern int xfrm_sysctl_init(struct net *net); 1313b27aeadbSAlexey Dobriyan #ifdef CONFIG_SYSCTL 1314b27aeadbSAlexey Dobriyan extern void xfrm_sysctl_fini(struct net *net); 1315b27aeadbSAlexey Dobriyan #else 1316b27aeadbSAlexey Dobriyan static inline void xfrm_sysctl_fini(struct net *net) 1317b27aeadbSAlexey Dobriyan { 1318b27aeadbSAlexey Dobriyan } 1319b27aeadbSAlexey Dobriyan #endif 1320b27aeadbSAlexey Dobriyan 13215c182458SHerbert Xu extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); 1322284fa7daSAlexey Dobriyan extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 13234c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1324abb81c4fSHerbert Xu extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); 1325673c09beSAlexey Dobriyan extern struct xfrm_state *xfrm_state_alloc(struct net *net); 13261da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, 13271da177e4SLinus Torvalds struct flowi *fl, struct xfrm_tmpl *tmpl, 13281da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 13291da177e4SLinus Torvalds unsigned short family); 1330bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, 13315447c5e4SAlexey Dobriyan xfrm_address_t *daddr, 1332628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1333628529b6SJamal Hadi Salim unsigned short family, 1334628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 13351da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 13361da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 13371da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 13381da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1339bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, 1340bd55775cSJamal Hadi Salim xfrm_address_t *daddr, __be32 spi, 1341bd55775cSJamal Hadi Salim u8 proto, unsigned short family); 1342bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, 1343bd55775cSJamal Hadi Salim xfrm_address_t *daddr, 1344bd55775cSJamal Hadi Salim xfrm_address_t *saddr, 1345bd55775cSJamal Hadi Salim u8 proto, 1346bd55775cSJamal Hadi Salim unsigned short family); 134741a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 134841a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 134941a49cc3SMasahide NAKAMURA int n, unsigned short family); 135041a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 135141a49cc3SMasahide NAKAMURA int n, unsigned short family); 135241a49cc3SMasahide NAKAMURA #else 135341a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 135441a49cc3SMasahide NAKAMURA int n, unsigned short family) 135541a49cc3SMasahide NAKAMURA { 135641a49cc3SMasahide NAKAMURA return -ENOSYS; 135741a49cc3SMasahide NAKAMURA } 135841a49cc3SMasahide NAKAMURA 135941a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 136041a49cc3SMasahide NAKAMURA int n, unsigned short family) 136141a49cc3SMasahide NAKAMURA { 136241a49cc3SMasahide NAKAMURA return -ENOSYS; 136341a49cc3SMasahide NAKAMURA } 136441a49cc3SMasahide NAKAMURA #endif 1365af11e316SJamal Hadi Salim 1366af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1367af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1368af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1369af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1370af11e316SJamal Hadi Salim }; 1371af11e316SJamal Hadi Salim 13725a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 13735a6d3416SJamal Hadi Salim u32 incnt; 13745a6d3416SJamal Hadi Salim u32 outcnt; 13755a6d3416SJamal Hadi Salim u32 fwdcnt; 13765a6d3416SJamal Hadi Salim u32 inscnt; 13775a6d3416SJamal Hadi Salim u32 outscnt; 13785a6d3416SJamal Hadi Salim u32 fwdscnt; 13795a6d3416SJamal Hadi Salim u32 spdhcnt; 13805a6d3416SJamal Hadi Salim u32 spdhmcnt; 13815a6d3416SJamal Hadi Salim }; 13825a6d3416SJamal Hadi Salim 1383bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, 1384bd55775cSJamal Hadi Salim u32 seq); 138526b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 13860e602451SAlexey Dobriyan extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); 1387e071041bSAlexey Dobriyan extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); 1388e071041bSAlexey Dobriyan extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); 1389afeb14b4SPaul Moore extern int xfrm_replay_check(struct xfrm_state *x, 1390afeb14b4SPaul Moore struct sk_buff *skb, __be32 seq); 139161f4627bSAl Viro extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); 1392f8cd5488SJamal Hadi Salim extern void xfrm_replay_notify(struct xfrm_state *x, int event); 13931da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 139472cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1395227620e2SHerbert Xu extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1396716062fdSHerbert Xu extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, 1397716062fdSHerbert Xu int encap_type); 13981bf06cd2SHerbert Xu extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1399c6581a45SHerbert Xu extern int xfrm_output_resume(struct sk_buff *skb, int err); 1400406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 1401df9dcb45SKazunori MIYAZAWA extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 140236cf9acfSHerbert Xu extern int xfrm4_extract_header(struct sk_buff *skb); 1403227620e2SHerbert Xu extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1404c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1405c4541b41SHerbert Xu int encap_type); 1406716062fdSHerbert Xu extern int xfrm4_transport_finish(struct sk_buff *skb, int async); 14071da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1408c4541b41SHerbert Xu 1409c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1410c4541b41SHerbert Xu { 1411c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1412c4541b41SHerbert Xu } 1413c4541b41SHerbert Xu 141436cf9acfSHerbert Xu extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 141536cf9acfSHerbert Xu extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14161da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 1417c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1418c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 141936cf9acfSHerbert Xu extern int xfrm6_extract_header(struct sk_buff *skb); 1420227620e2SHerbert Xu extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 142133b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1422716062fdSHerbert Xu extern int xfrm6_transport_finish(struct sk_buff *skb, int async); 1423e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1424fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1425fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 142673d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 142773d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 1428a1664773SAlexey Dobriyan extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); 1429a1664773SAlexey Dobriyan extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, xfrm_address_t *saddr); 143036cf9acfSHerbert Xu extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 143136cf9acfSHerbert Xu extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14321da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 1433aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1434aee5adb4SMasahide NAKAMURA u8 **prevhdr); 14351da177e4SLinus Torvalds 14361da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1437067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 14381da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 14391da177e4SLinus Torvalds #else 14401da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 14411da177e4SLinus Torvalds { 14421da177e4SLinus Torvalds return -ENOPROTOOPT; 14431da177e4SLinus Torvalds } 14441da177e4SLinus Torvalds 1445067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 14461da177e4SLinus Torvalds { 14471da177e4SLinus Torvalds /* should not happen */ 14481da177e4SLinus Torvalds kfree_skb(skb); 14491da177e4SLinus Torvalds return 0; 14501da177e4SLinus Torvalds } 14511da177e4SLinus Torvalds #endif 14521da177e4SLinus Torvalds 14530331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 14544c563f76STimo Teras 145512a169e7SHerbert Xu extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 1456cdcbca7cSAlexey Dobriyan extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, 14574c563f76STimo Teras int (*func)(struct xfrm_policy *, int, int, void*), void *); 145812a169e7SHerbert Xu extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); 14591da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 14608ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, 14618ca2e93bSJamal Hadi Salim u8 type, int dir, 14624e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1463ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1464ef41aaa0SEric Paris int *err); 14658ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err); 146633ffbbd5SAlexey Dobriyan int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); 14671da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1468658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 1469bd55775cSJamal Hadi Salim struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark, 1470bd55775cSJamal Hadi Salim u8 mode, u32 reqid, u8 proto, 1471bd55775cSJamal Hadi Salim xfrm_address_t *daddr, 1472bd55775cSJamal Hadi Salim xfrm_address_t *saddr, int create, 1473bd55775cSJamal Hadi Salim unsigned short family); 14741da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 14751da177e4SLinus Torvalds 147680c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 147780c9abaaSShinta Sugimoto extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 147813c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 147913c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 148080c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 148180c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 148280c9abaaSShinta Sugimoto struct xfrm_migrate *m); 148380c9abaaSShinta Sugimoto extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 148413c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 148513c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 148680c9abaaSShinta Sugimoto #endif 148780c9abaaSShinta Sugimoto 14885d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 14896c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 1490db983c11SAlexey Dobriyan extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 14911da177e4SLinus Torvalds 14921da177e4SLinus Torvalds extern void xfrm_input_init(void); 14936067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 14941da177e4SLinus Torvalds 14951da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 14961da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 14971da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 14981da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 14991da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 15001da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 15011da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 15021da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 15031da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); 15041da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); 15051da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); 15061a6509d9SHerbert Xu extern struct xfrm_algo_desc *xfrm_aead_get_byname(char *name, int icv_len, 15071a6509d9SHerbert Xu int probe); 15081da177e4SLinus Torvalds 150907d4ee58SHerbert Xu struct hash_desc; 15109409f38aSHerbert Xu struct scatterlist; 151107d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 151207d4ee58SHerbert Xu unsigned int); 15131da177e4SLinus Torvalds 15141da177e4SLinus Torvalds static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, 15151da177e4SLinus Torvalds int family) 15161da177e4SLinus Torvalds { 15171da177e4SLinus Torvalds switch (family) { 15181da177e4SLinus Torvalds default: 15191da177e4SLinus Torvalds case AF_INET: 1520a6337463Sjamal return (__force u32)a->a4 - (__force u32)b->a4; 15211da177e4SLinus Torvalds case AF_INET6: 15221da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 15231da177e4SLinus Torvalds (struct in6_addr *)b); 15241da177e4SLinus Torvalds } 15251da177e4SLinus Torvalds } 15261da177e4SLinus Torvalds 152777d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 152877d8d7a6SHerbert Xu { 152977d8d7a6SHerbert Xu return index & 7; 153077d8d7a6SHerbert Xu } 153177d8d7a6SHerbert Xu 1532a6483b79SAlexey Dobriyan #ifdef CONFIG_XFRM 1533a6483b79SAlexey Dobriyan static inline int xfrm_aevent_is_on(struct net *net) 1534f8cd5488SJamal Hadi Salim { 1535be33690dSPatrick McHardy struct sock *nlsk; 1536be33690dSPatrick McHardy int ret = 0; 1537be33690dSPatrick McHardy 1538be33690dSPatrick McHardy rcu_read_lock(); 1539a6483b79SAlexey Dobriyan nlsk = rcu_dereference(net->xfrm.nlsk); 1540be33690dSPatrick McHardy if (nlsk) 1541be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1542be33690dSPatrick McHardy rcu_read_unlock(); 1543be33690dSPatrick McHardy return ret; 1544f8cd5488SJamal Hadi Salim } 1545a6483b79SAlexey Dobriyan #endif 1546f8cd5488SJamal Hadi Salim 15470f99be0dSEric Dumazet static inline int xfrm_alg_len(struct xfrm_algo *alg) 15480f99be0dSEric Dumazet { 15490f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 15500f99be0dSEric Dumazet } 15510f99be0dSEric Dumazet 15524447bb33SMartin Willi static inline int xfrm_alg_auth_len(struct xfrm_algo_auth *alg) 15534447bb33SMartin Willi { 15544447bb33SMartin Willi return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 15554447bb33SMartin Willi } 15564447bb33SMartin Willi 155780c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 155880c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 155980c9abaaSShinta Sugimoto { 15600f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 156180c9abaaSShinta Sugimoto } 156280c9abaaSShinta Sugimoto 15634447bb33SMartin Willi static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) 15644447bb33SMartin Willi { 15654447bb33SMartin Willi return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); 15664447bb33SMartin Willi } 15674447bb33SMartin Willi 156880c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 156980c9abaaSShinta Sugimoto { 157080c9abaaSShinta Sugimoto int i; 157180c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 157280c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 157380c9abaaSShinta Sugimoto } 157480c9abaaSShinta Sugimoto 157580c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 157680c9abaaSShinta Sugimoto { 157780c9abaaSShinta Sugimoto int i; 157880c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 157980c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 158080c9abaaSShinta Sugimoto } 158180c9abaaSShinta Sugimoto #endif 1582f8cd5488SJamal Hadi Salim 1583def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 158400501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 158500501121SHerbert Xu { 158600501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 158700501121SHerbert Xu } 1588def8b4faSAlexey Dobriyan #endif 158900501121SHerbert Xu 1590bf825f81SJamal Hadi Salim static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) 1591bf825f81SJamal Hadi Salim { 1592bf825f81SJamal Hadi Salim if (attrs[XFRMA_MARK]) 15934efd7e83SAndreas Steffen memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); 1594bf825f81SJamal Hadi Salim else 1595bf825f81SJamal Hadi Salim m->v = m->m = 0; 1596bf825f81SJamal Hadi Salim 1597bf825f81SJamal Hadi Salim return m->v & m->m; 1598bf825f81SJamal Hadi Salim } 1599bf825f81SJamal Hadi Salim 1600bf825f81SJamal Hadi Salim static inline int xfrm_mark_put(struct sk_buff *skb, struct xfrm_mark *m) 1601bf825f81SJamal Hadi Salim { 1602bf825f81SJamal Hadi Salim if (m->m | m->v) 1603bf825f81SJamal Hadi Salim NLA_PUT(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); 1604bf825f81SJamal Hadi Salim return 0; 1605bf825f81SJamal Hadi Salim 1606bf825f81SJamal Hadi Salim nla_put_failure: 1607bf825f81SJamal Hadi Salim return -1; 1608bf825f81SJamal Hadi Salim } 1609bf825f81SJamal Hadi Salim 16101da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1611