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> 151da177e4SLinus Torvalds 161da177e4SLinus Torvalds #include <net/sock.h> 171da177e4SLinus Torvalds #include <net/dst.h> 18436a0a40SHerbert Xu #include <net/ip.h> 191da177e4SLinus Torvalds #include <net/route.h> 201da177e4SLinus Torvalds #include <net/ipv6.h> 211da177e4SLinus Torvalds #include <net/ip6_fib.h> 221da177e4SLinus Torvalds 23d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ESP 50 24d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_AH 51 25d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_COMP 108 26d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPIP 4 27d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPV6 41 28d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ROUTING IPPROTO_ROUTING 29d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS 30d3d6dd3aSMasahide NAKAMURA 311da177e4SLinus Torvalds #define XFRM_ALIGN8(len) (((len) + 7) & ~7) 32b59f45d0SHerbert Xu #define MODULE_ALIAS_XFRM_MODE(family, encap) \ 33b59f45d0SHerbert Xu MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) 34d3d6dd3aSMasahide NAKAMURA #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ 35d3d6dd3aSMasahide NAKAMURA MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) 361da177e4SLinus Torvalds 37f8cd5488SJamal Hadi Salim extern struct sock *xfrm_nl; 38f8cd5488SJamal Hadi Salim extern u32 sysctl_xfrm_aevent_etime; 39f8cd5488SJamal Hadi Salim extern u32 sysctl_xfrm_aevent_rseqth; 40f8cd5488SJamal Hadi Salim 414a3e2f71SArjan van de Ven extern struct mutex xfrm_cfg_mutex; 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds /* Organization of SPD aka "XFRM rules" 441da177e4SLinus Torvalds ------------------------------------ 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds Basic objects: 471da177e4SLinus Torvalds - policy rule, struct xfrm_policy (=SPD entry) 481da177e4SLinus Torvalds - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) 491da177e4SLinus Torvalds - instance of a transformer, struct xfrm_state (=SA) 501da177e4SLinus Torvalds - template to clone xfrm_state, struct xfrm_tmpl 511da177e4SLinus Torvalds 521da177e4SLinus Torvalds SPD is plain linear list of xfrm_policy rules, ordered by priority. 531da177e4SLinus Torvalds (To be compatible with existing pfkeyv2 implementations, 541da177e4SLinus Torvalds many rules with priority of 0x7fffffff are allowed to exist and 551da177e4SLinus Torvalds such rules are ordered in an unpredictable way, thanks to bsd folks.) 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds Lookup is plain linear search until the first match with selector. 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds If "action" is "block", then we prohibit the flow, otherwise: 601da177e4SLinus Torvalds if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, 611da177e4SLinus Torvalds policy entry has list of up to XFRM_MAX_DEPTH transformations, 621da177e4SLinus Torvalds described by templates xfrm_tmpl. Each template is resolved 631da177e4SLinus Torvalds to a complete xfrm_state (see below) and we pack bundle of transformations 641da177e4SLinus Torvalds to a dst_entry returned to requestor. 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds dst -. xfrm .-> xfrm_state #1 671da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #2 681da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #3 691da177e4SLinus Torvalds |---. child .-> NULL 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds Bundles are cached at xrfm_policy struct (field ->bundles). 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds Resolution of xrfm_tmpl 751da177e4SLinus Torvalds ----------------------- 761da177e4SLinus Torvalds Template contains: 771da177e4SLinus Torvalds 1. ->mode Mode: transport or tunnel 781da177e4SLinus Torvalds 2. ->id.proto Protocol: AH/ESP/IPCOMP 791da177e4SLinus Torvalds 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. 801da177e4SLinus Torvalds Q: allow to resolve security gateway? 811da177e4SLinus Torvalds 4. ->id.spi If not zero, static SPI. 821da177e4SLinus Torvalds 5. ->saddr Local tunnel endpoint, ignored for transport mode. 831da177e4SLinus Torvalds 6. ->algos List of allowed algos. Plain bitmask now. 841da177e4SLinus Torvalds Q: ealgos, aalgos, calgos. What a mess... 851da177e4SLinus Torvalds 7. ->share Sharing mode. 861da177e4SLinus Torvalds Q: how to implement private sharing mode? To add struct sock* to 871da177e4SLinus Torvalds flow id? 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds Having this template we search through SAD searching for entries 901da177e4SLinus Torvalds with appropriate mode/proto/algo, permitted by selector. 911da177e4SLinus Torvalds If no appropriate entry found, it is requested from key manager. 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds PROBLEMS: 941da177e4SLinus Torvalds Q: How to find all the bundles referring to a physical path for 951da177e4SLinus Torvalds PMTU discovery? Seems, dst should contain list of all parents... 961da177e4SLinus Torvalds and enter to infinite locking hierarchy disaster. 971da177e4SLinus Torvalds No! It is easier, we will not search for them, let them find us. 981da177e4SLinus Torvalds We add genid to each dst plus pointer to genid of raw IP route, 991da177e4SLinus Torvalds pmtu disc will update pmtu on raw IP route and increase its genid. 1001da177e4SLinus Torvalds dst_check() will see this for top level and trigger resyncing 1011da177e4SLinus Torvalds metrics. Plus, it will be made via sk->sk_dst_cache. Solved. 1021da177e4SLinus Torvalds */ 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds /* Full description of state of transformer. */ 1051da177e4SLinus Torvalds struct xfrm_state 1061da177e4SLinus Torvalds { 1071da177e4SLinus Torvalds /* Note: bydst is re-used during gc */ 1088f126e37SDavid S. Miller struct hlist_node bydst; 1098f126e37SDavid S. Miller struct hlist_node bysrc; 1108f126e37SDavid S. Miller struct hlist_node byspi; 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds atomic_t refcnt; 1131da177e4SLinus Torvalds spinlock_t lock; 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds struct xfrm_id id; 1161da177e4SLinus Torvalds struct xfrm_selector sel; 1171da177e4SLinus Torvalds 1189d4a706dSDavid S. Miller u32 genid; 1199d4a706dSDavid S. Miller 1201da177e4SLinus Torvalds /* Key manger bits */ 1211da177e4SLinus Torvalds struct { 1221da177e4SLinus Torvalds u8 state; 1231da177e4SLinus Torvalds u8 dying; 1241da177e4SLinus Torvalds u32 seq; 1251da177e4SLinus Torvalds } km; 1261da177e4SLinus Torvalds 1271da177e4SLinus Torvalds /* Parameters of this state. */ 1281da177e4SLinus Torvalds struct { 1291da177e4SLinus Torvalds u32 reqid; 1301da177e4SLinus Torvalds u8 mode; 1311da177e4SLinus Torvalds u8 replay_window; 1321da177e4SLinus Torvalds u8 aalgo, ealgo, calgo; 1331da177e4SLinus Torvalds u8 flags; 1341da177e4SLinus Torvalds u16 family; 1351da177e4SLinus Torvalds xfrm_address_t saddr; 1361da177e4SLinus Torvalds int header_len; 1371da177e4SLinus Torvalds int trailer_len; 1381da177e4SLinus Torvalds } props; 1391da177e4SLinus Torvalds 1401da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds /* Data for transformer */ 1431da177e4SLinus Torvalds struct xfrm_algo *aalg; 1441da177e4SLinus Torvalds struct xfrm_algo *ealg; 1451da177e4SLinus Torvalds struct xfrm_algo *calg; 1461da177e4SLinus Torvalds 1471da177e4SLinus Torvalds /* Data for encapsulator */ 1481da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 1491da177e4SLinus Torvalds 150060f02a3SNoriaki TAKAMIYA /* Data for care-of address */ 151060f02a3SNoriaki TAKAMIYA xfrm_address_t *coaddr; 152060f02a3SNoriaki TAKAMIYA 1531da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1541da177e4SLinus Torvalds struct xfrm_state *tunnel; 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1571da177e4SLinus Torvalds atomic_t tunnel_users; 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds /* State for replay detection */ 1601da177e4SLinus Torvalds struct xfrm_replay_state replay; 1611da177e4SLinus Torvalds 162f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 163f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 164f8cd5488SJamal Hadi Salim 1652717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 1662717096aSJamal Hadi Salim * moment 1672717096aSJamal Hadi Salim */ 1682717096aSJamal Hadi Salim u32 xflags; 1692717096aSJamal Hadi Salim 170f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 171f8cd5488SJamal Hadi Salim u32 replay_maxage; 172f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 173f8cd5488SJamal Hadi Salim 174f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 175f8cd5488SJamal Hadi Salim struct timer_list rtimer; 176f8cd5488SJamal Hadi Salim 1771da177e4SLinus Torvalds /* Statistics */ 1781da177e4SLinus Torvalds struct xfrm_stats stats; 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 1811da177e4SLinus Torvalds struct timer_list timer; 1821da177e4SLinus Torvalds 1839afaca05SMasahide NAKAMURA /* Last used time */ 1849afaca05SMasahide NAKAMURA u64 lastused; 1859afaca05SMasahide NAKAMURA 1861da177e4SLinus Torvalds /* Reference to data common to all the instances of this 1871da177e4SLinus Torvalds * transformer. */ 1881da177e4SLinus Torvalds struct xfrm_type *type; 189b59f45d0SHerbert Xu struct xfrm_mode *mode; 1901da177e4SLinus Torvalds 191df71837dSTrent Jaeger /* Security context */ 192df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 193df71837dSTrent Jaeger 1941da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 1951da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 1961da177e4SLinus Torvalds void *data; 1971da177e4SLinus Torvalds }; 1981da177e4SLinus Torvalds 1992717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2002717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 2012717096aSJamal Hadi Salim 2021da177e4SLinus Torvalds enum { 2031da177e4SLinus Torvalds XFRM_STATE_VOID, 2041da177e4SLinus Torvalds XFRM_STATE_ACQ, 2051da177e4SLinus Torvalds XFRM_STATE_VALID, 2061da177e4SLinus Torvalds XFRM_STATE_ERROR, 2071da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2081da177e4SLinus Torvalds XFRM_STATE_DEAD 2091da177e4SLinus Torvalds }; 2101da177e4SLinus Torvalds 21126b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 21226b15dadSJamal Hadi Salim struct km_event 21326b15dadSJamal Hadi Salim { 214bf08867fSHerbert Xu union { 215bf08867fSHerbert Xu u32 hard; 216bf08867fSHerbert Xu u32 proto; 217bf08867fSHerbert Xu u32 byid; 218f8cd5488SJamal Hadi Salim u32 aevent; 219f7b6983fSMasahide NAKAMURA u32 type; 220bf08867fSHerbert Xu } data; 221bf08867fSHerbert Xu 22226b15dadSJamal Hadi Salim u32 seq; 22326b15dadSJamal Hadi Salim u32 pid; 22426b15dadSJamal Hadi Salim u32 event; 22526b15dadSJamal Hadi Salim }; 22626b15dadSJamal Hadi Salim 2271da177e4SLinus Torvalds struct xfrm_type; 2281da177e4SLinus Torvalds struct xfrm_dst; 2291da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2301da177e4SLinus Torvalds unsigned short family; 2311da177e4SLinus Torvalds struct dst_ops *dst_ops; 2321da177e4SLinus Torvalds void (*garbage_collect)(void); 2331da177e4SLinus Torvalds int (*dst_lookup)(struct xfrm_dst **dst, struct flowi *fl); 234a1e59abfSPatrick McHardy int (*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr); 2351da177e4SLinus Torvalds struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); 2361da177e4SLinus Torvalds int (*bundle_create)(struct xfrm_policy *policy, 2371da177e4SLinus Torvalds struct xfrm_state **xfrm, 2381da177e4SLinus Torvalds int nx, 2391da177e4SLinus Torvalds struct flowi *fl, 2401da177e4SLinus Torvalds struct dst_entry **dst_p); 2411da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 2421da177e4SLinus Torvalds struct flowi *fl); 2431da177e4SLinus Torvalds }; 2441da177e4SLinus Torvalds 2451da177e4SLinus Torvalds extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 2461da177e4SLinus Torvalds extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 24726b15dadSJamal Hadi Salim extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); 24826b15dadSJamal Hadi Salim extern void km_state_notify(struct xfrm_state *x, struct km_event *c); 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds struct xfrm_tmpl; 251980ebd25SJamal Hadi Salim extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 25253bc6b4dSJamal Hadi Salim extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); 25353bc6b4dSJamal Hadi Salim extern int __xfrm_state_delete(struct xfrm_state *x); 25453bc6b4dSJamal Hadi Salim 2551da177e4SLinus Torvalds struct xfrm_state_afinfo { 2561da177e4SLinus Torvalds unsigned short family; 257aa5d62ccSHerbert Xu struct xfrm_type *type_map[IPPROTO_MAX]; 258aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 259d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 2601da177e4SLinus Torvalds void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, 2611da177e4SLinus Torvalds struct xfrm_tmpl *tmpl, 2621da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr); 26341a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 26441a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 265cdca7265SMiika Komu int (*output)(struct sk_buff *skb); 2661da177e4SLinus Torvalds }; 2671da177e4SLinus Torvalds 2681da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 2691da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 270cdca7265SMiika Komu extern struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned short family); 271cdca7265SMiika Komu extern void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvalds struct xfrm_type 2761da177e4SLinus Torvalds { 2771da177e4SLinus Torvalds char *description; 2781da177e4SLinus Torvalds struct module *owner; 2791da177e4SLinus Torvalds __u8 proto; 2801b5c2299SMasahide NAKAMURA __u8 flags; 2811b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 282436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 2831da177e4SLinus Torvalds 28472cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 2851da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 286e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 2871da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 288df0ba92aSMasahide NAKAMURA int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); 289aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 29099505a84SMasahide NAKAMURA xfrm_address_t *(*local_addr)(struct xfrm_state *, xfrm_address_t *); 29199505a84SMasahide NAKAMURA xfrm_address_t *(*remote_addr)(struct xfrm_state *, xfrm_address_t *); 2921da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 293c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 2941da177e4SLinus Torvalds }; 2951da177e4SLinus Torvalds 2961da177e4SLinus Torvalds extern int xfrm_register_type(struct xfrm_type *type, unsigned short family); 2971da177e4SLinus Torvalds extern int xfrm_unregister_type(struct xfrm_type *type, unsigned short family); 2981da177e4SLinus Torvalds 299b59f45d0SHerbert Xu struct xfrm_mode { 300b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 30137fedd3aSHerbert Xu 30237fedd3aSHerbert Xu /* 30337fedd3aSHerbert Xu * Add encapsulation header. 30437fedd3aSHerbert Xu * 30537fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 30637fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 30737fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 30837fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 30937fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 31037fedd3aSHerbert Xu * header. The value of the network header will always point 31137fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 31237fedd3aSHerbert Xu */ 313eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x,struct sk_buff *skb); 314b59f45d0SHerbert Xu 315b59f45d0SHerbert Xu struct module *owner; 316b59f45d0SHerbert Xu unsigned int encap; 317*1bfcb10fSHerbert Xu int flags; 318*1bfcb10fSHerbert Xu }; 319*1bfcb10fSHerbert Xu 320*1bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 321*1bfcb10fSHerbert Xu enum { 322*1bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 323b59f45d0SHerbert Xu }; 324b59f45d0SHerbert Xu 325b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 326b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 327b59f45d0SHerbert Xu 3281da177e4SLinus Torvalds struct xfrm_tmpl 3291da177e4SLinus Torvalds { 3301da177e4SLinus Torvalds /* id in template is interpreted as: 3311da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 3321da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 3331da177e4SLinus Torvalds * daddr must be fixed too. 3341da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 3351da177e4SLinus Torvalds */ 3361da177e4SLinus Torvalds struct xfrm_id id; 3371da177e4SLinus Torvalds 3381da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 3391da177e4SLinus Torvalds xfrm_address_t saddr; 3401da177e4SLinus Torvalds 34176b3f055SMiika Komu unsigned short encap_family; 34276b3f055SMiika Komu 3431da177e4SLinus Torvalds __u32 reqid; 3441da177e4SLinus Torvalds 3457e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 3461da177e4SLinus Torvalds __u8 mode; 3471da177e4SLinus Torvalds 3481da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 3491da177e4SLinus Torvalds __u8 share; 3501da177e4SLinus Torvalds 3511da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 3521da177e4SLinus Torvalds __u8 optional; 3531da177e4SLinus Torvalds 3541da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 3551da177e4SLinus Torvalds __u32 aalgos; 3561da177e4SLinus Torvalds __u32 ealgos; 3571da177e4SLinus Torvalds __u32 calgos; 3581da177e4SLinus Torvalds }; 3591da177e4SLinus Torvalds 360622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 3611da177e4SLinus Torvalds 3621da177e4SLinus Torvalds struct xfrm_policy 3631da177e4SLinus Torvalds { 3641da177e4SLinus Torvalds struct xfrm_policy *next; 3652518c7c2SDavid S. Miller struct hlist_node bydst; 3662518c7c2SDavid S. Miller struct hlist_node byidx; 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 3691da177e4SLinus Torvalds rwlock_t lock; 3701da177e4SLinus Torvalds atomic_t refcnt; 3711da177e4SLinus Torvalds struct timer_list timer; 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds u32 priority; 3741da177e4SLinus Torvalds u32 index; 3751da177e4SLinus Torvalds struct xfrm_selector selector; 3761da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 3771da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 3781da177e4SLinus Torvalds struct dst_entry *bundles; 37946ca5f5dSArnaldo Carvalho de Melo u16 family; 38046ca5f5dSArnaldo Carvalho de Melo u8 type; 38146ca5f5dSArnaldo Carvalho de Melo u8 action; 38246ca5f5dSArnaldo Carvalho de Melo u8 flags; 38346ca5f5dSArnaldo Carvalho de Melo u8 dead; 38446ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 38546ca5f5dSArnaldo Carvalho de Melo /* XXX 1 byte hole, try to pack */ 386df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 3871da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 3881da177e4SLinus Torvalds }; 3891da177e4SLinus Torvalds 39080c9abaaSShinta Sugimoto struct xfrm_migrate { 39180c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 39280c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 39380c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 39480c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 39580c9abaaSShinta Sugimoto u8 proto; 39680c9abaaSShinta Sugimoto u8 mode; 39780c9abaaSShinta Sugimoto u16 reserved; 39880c9abaaSShinta Sugimoto u32 reqid; 39980c9abaaSShinta Sugimoto u16 old_family; 40080c9abaaSShinta Sugimoto u16 new_family; 40180c9abaaSShinta Sugimoto }; 40280c9abaaSShinta Sugimoto 4031da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 404f8cd5488SJamal Hadi Salim /* which seqno */ 405f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 406f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 407f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 408f8cd5488SJamal Hadi Salim /* what happened */ 409f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 410f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 411f8cd5488SJamal Hadi Salim 412f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 413f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 414f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 415f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 416f8cd5488SJamal Hadi Salim /* default seq threshold size */ 417f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 4181da177e4SLinus Torvalds 4191da177e4SLinus Torvalds struct xfrm_mgr 4201da177e4SLinus Torvalds { 4211da177e4SLinus Torvalds struct list_head list; 4221da177e4SLinus Torvalds char *id; 42326b15dadSJamal Hadi Salim int (*notify)(struct xfrm_state *x, struct km_event *c); 4241da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 425cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 4265d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 42726b15dadSJamal Hadi Salim int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); 42897a64b45SMasahide NAKAMURA int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 42980c9abaaSShinta Sugimoto int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles); 4301da177e4SLinus Torvalds }; 4311da177e4SLinus Torvalds 4321da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 4331da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 4341da177e4SLinus Torvalds 4352518c7c2SDavid S. Miller extern unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2]; 4361da177e4SLinus Torvalds 437436a0a40SHerbert Xu /* 438436a0a40SHerbert Xu * This structure is used for the duration where packets are being 439436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 440436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 441436a0a40SHerbert Xu */ 442436a0a40SHerbert Xu struct xfrm_skb_cb { 443436a0a40SHerbert Xu union { 444436a0a40SHerbert Xu struct inet_skb_parm h4; 445436a0a40SHerbert Xu struct inet6_skb_parm h6; 446436a0a40SHerbert Xu } header; 447436a0a40SHerbert Xu 448436a0a40SHerbert Xu /* Sequence number for replay protection. */ 449436a0a40SHerbert Xu u64 seq; 450436a0a40SHerbert Xu }; 451436a0a40SHerbert Xu 452436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 453436a0a40SHerbert Xu 454161a09e7SJoy Latten /* Audit Information */ 455161a09e7SJoy Latten struct xfrm_audit 456161a09e7SJoy Latten { 457ab5f5e8bSJoy Latten u32 loginuid; 458161a09e7SJoy Latten u32 secid; 459161a09e7SJoy Latten }; 460c9204d9cSJoy Latten 461c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 462ab5f5e8bSJoy Latten static inline struct audit_buffer *xfrm_audit_start(u32 auid, u32 sid) 463ab5f5e8bSJoy Latten { 464ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 465ab5f5e8bSJoy Latten char *secctx; 466ab5f5e8bSJoy Latten u32 secctx_len; 467ab5f5e8bSJoy Latten 468ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 469ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 470ab5f5e8bSJoy Latten if (audit_buf == NULL) 471ab5f5e8bSJoy Latten return NULL; 472ab5f5e8bSJoy Latten 473ab5f5e8bSJoy Latten audit_log_format(audit_buf, "auid=%u", auid); 474ab5f5e8bSJoy Latten 475ab5f5e8bSJoy Latten if (sid != 0 && 476ab5f5e8bSJoy Latten security_secid_to_secctx(sid, &secctx, &secctx_len) == 0) { 477ab5f5e8bSJoy Latten audit_log_format(audit_buf, " subj=%s", secctx); 478ab5f5e8bSJoy Latten security_release_secctx(secctx, secctx_len); 479ab5f5e8bSJoy Latten } else 480ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 481ab5f5e8bSJoy Latten return audit_buf; 482ab5f5e8bSJoy Latten } 483ab5f5e8bSJoy Latten 484ab5f5e8bSJoy Latten extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 485ab5f5e8bSJoy Latten u32 auid, u32 sid); 486ab5f5e8bSJoy Latten extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 487ab5f5e8bSJoy Latten u32 auid, u32 sid); 488ab5f5e8bSJoy Latten extern void xfrm_audit_state_add(struct xfrm_state *x, int result, 489ab5f5e8bSJoy Latten u32 auid, u32 sid); 490ab5f5e8bSJoy Latten extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, 491ab5f5e8bSJoy Latten u32 auid, u32 sid); 492c9204d9cSJoy Latten #else 493ab5f5e8bSJoy Latten #define xfrm_audit_policy_add(x, r, a, s) do { ; } while (0) 494ab5f5e8bSJoy Latten #define xfrm_audit_policy_delete(x, r, a, s) do { ; } while (0) 495ab5f5e8bSJoy Latten #define xfrm_audit_state_add(x, r, a, s) do { ; } while (0) 496ab5f5e8bSJoy Latten #define xfrm_audit_state_delete(x, r, a, s) do { ; } while (0) 497c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 498161a09e7SJoy Latten 4991da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 5001da177e4SLinus Torvalds { 5011da177e4SLinus Torvalds if (likely(policy != NULL)) 5021da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 5031da177e4SLinus Torvalds } 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds extern void __xfrm_policy_destroy(struct xfrm_policy *policy); 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 5081da177e4SLinus Torvalds { 5091da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 5101da177e4SLinus Torvalds __xfrm_policy_destroy(policy); 5111da177e4SLinus Torvalds } 5121da177e4SLinus Torvalds 5134e81bb83SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 5144e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 5154e81bb83SMasahide NAKAMURA { 5164e81bb83SMasahide NAKAMURA int i; 5174e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 5184e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 5194e81bb83SMasahide NAKAMURA } 5204e81bb83SMasahide NAKAMURA #else 5214e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 5224e81bb83SMasahide NAKAMURA { 5234e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[0]); 5244e81bb83SMasahide NAKAMURA } 5254e81bb83SMasahide NAKAMURA #endif 5264e81bb83SMasahide NAKAMURA 5271da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 5281da177e4SLinus Torvalds 52921380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 53021380b81SHerbert Xu { 53121380b81SHerbert Xu atomic_dec(&x->refcnt); 53221380b81SHerbert Xu } 53321380b81SHerbert Xu 5341da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 5351da177e4SLinus Torvalds { 5361da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 5371da177e4SLinus Torvalds __xfrm_state_destroy(x); 5381da177e4SLinus Torvalds } 5391da177e4SLinus Torvalds 5401da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 5411da177e4SLinus Torvalds { 5421da177e4SLinus Torvalds atomic_inc(&x->refcnt); 5431da177e4SLinus Torvalds } 5441da177e4SLinus Torvalds 5451da177e4SLinus Torvalds static __inline__ int addr_match(void *token1, void *token2, int prefixlen) 5461da177e4SLinus Torvalds { 5475f19343fSAl Viro __be32 *a1 = token1; 5485f19343fSAl Viro __be32 *a2 = token2; 5491da177e4SLinus Torvalds int pdw; 5501da177e4SLinus Torvalds int pbi; 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ 5531da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 5541da177e4SLinus Torvalds 5551da177e4SLinus Torvalds if (pdw) 5561da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 5571da177e4SLinus Torvalds return 0; 5581da177e4SLinus Torvalds 5591da177e4SLinus Torvalds if (pbi) { 5605f19343fSAl Viro __be32 mask; 5611da177e4SLinus Torvalds 5621da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 5631da177e4SLinus Torvalds 5641da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 5651da177e4SLinus Torvalds return 0; 5661da177e4SLinus Torvalds } 5671da177e4SLinus Torvalds 5681da177e4SLinus Torvalds return 1; 5691da177e4SLinus Torvalds } 5701da177e4SLinus Torvalds 5711da177e4SLinus Torvalds static __inline__ 572f9d07e41SAl Viro __be16 xfrm_flowi_sport(struct flowi *fl) 5731da177e4SLinus Torvalds { 574f9d07e41SAl Viro __be16 port; 5751da177e4SLinus Torvalds switch(fl->proto) { 5761da177e4SLinus Torvalds case IPPROTO_TCP: 5771da177e4SLinus Torvalds case IPPROTO_UDP: 578ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 5791da177e4SLinus Torvalds case IPPROTO_SCTP: 5801da177e4SLinus Torvalds port = fl->fl_ip_sport; 5811da177e4SLinus Torvalds break; 5821da177e4SLinus Torvalds case IPPROTO_ICMP: 5831da177e4SLinus Torvalds case IPPROTO_ICMPV6: 5841da177e4SLinus Torvalds port = htons(fl->fl_icmp_type); 5851da177e4SLinus Torvalds break; 5862ce4272aSMasahide NAKAMURA case IPPROTO_MH: 5872ce4272aSMasahide NAKAMURA port = htons(fl->fl_mh_type); 5882ce4272aSMasahide NAKAMURA break; 5891da177e4SLinus Torvalds default: 5901da177e4SLinus Torvalds port = 0; /*XXX*/ 5911da177e4SLinus Torvalds } 5921da177e4SLinus Torvalds return port; 5931da177e4SLinus Torvalds } 5941da177e4SLinus Torvalds 5951da177e4SLinus Torvalds static __inline__ 596f9d07e41SAl Viro __be16 xfrm_flowi_dport(struct flowi *fl) 5971da177e4SLinus Torvalds { 598f9d07e41SAl Viro __be16 port; 5991da177e4SLinus Torvalds switch(fl->proto) { 6001da177e4SLinus Torvalds case IPPROTO_TCP: 6011da177e4SLinus Torvalds case IPPROTO_UDP: 602ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 6031da177e4SLinus Torvalds case IPPROTO_SCTP: 6041da177e4SLinus Torvalds port = fl->fl_ip_dport; 6051da177e4SLinus Torvalds break; 6061da177e4SLinus Torvalds case IPPROTO_ICMP: 6071da177e4SLinus Torvalds case IPPROTO_ICMPV6: 6081da177e4SLinus Torvalds port = htons(fl->fl_icmp_code); 6091da177e4SLinus Torvalds break; 6101da177e4SLinus Torvalds default: 6111da177e4SLinus Torvalds port = 0; /*XXX*/ 6121da177e4SLinus Torvalds } 6131da177e4SLinus Torvalds return port; 6141da177e4SLinus Torvalds } 6151da177e4SLinus Torvalds 61677681021SAndrew Morton extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, 61777681021SAndrew Morton unsigned short family); 6181da177e4SLinus Torvalds 619df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 620df71837dSTrent Jaeger /* If neither has a context --> match 621df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 622df71837dSTrent Jaeger */ 623df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 624df71837dSTrent Jaeger { 625df71837dSTrent Jaeger return ((!s1 && !s2) || 626df71837dSTrent Jaeger (s1 && s2 && 627df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 628df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 629df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 630df71837dSTrent Jaeger } 631df71837dSTrent Jaeger #else 632df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 633df71837dSTrent Jaeger { 634df71837dSTrent Jaeger return 1; 635df71837dSTrent Jaeger } 636df71837dSTrent Jaeger #endif 637df71837dSTrent Jaeger 6381da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 6391da177e4SLinus Torvalds * 6401da177e4SLinus Torvalds * dst->child points to the next element of bundle. 6411da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 6421da177e4SLinus Torvalds * 6431da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 6441da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 6451da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 6461da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 6471da177e4SLinus Torvalds * policy rule. 6481da177e4SLinus Torvalds */ 6491da177e4SLinus Torvalds struct xfrm_dst 6501da177e4SLinus Torvalds { 6511da177e4SLinus Torvalds union { 6521da177e4SLinus Torvalds struct dst_entry dst; 6531da177e4SLinus Torvalds struct rtable rt; 6541da177e4SLinus Torvalds struct rt6_info rt6; 6551da177e4SLinus Torvalds } u; 6561da177e4SLinus Torvalds struct dst_entry *route; 657157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 658157bfc25SMasahide NAKAMURA struct flowi *origin; 659157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 660157bfc25SMasahide NAKAMURA #endif 6619d4a706dSDavid S. Miller u32 genid; 6621da177e4SLinus Torvalds u32 route_mtu_cached; 6631da177e4SLinus Torvalds u32 child_mtu_cached; 66492d63decSHideaki YOSHIFUJI u32 route_cookie; 66592d63decSHideaki YOSHIFUJI u32 path_cookie; 6661da177e4SLinus Torvalds }; 6671da177e4SLinus Torvalds 668aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 669aabc9761SHerbert Xu { 670aabc9761SHerbert Xu dst_release(xdst->route); 671aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 672aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 673157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 674157bfc25SMasahide NAKAMURA kfree(xdst->origin); 675157bfc25SMasahide NAKAMURA xdst->origin = NULL; 676157bfc25SMasahide NAKAMURA kfree(xdst->partner); 677157bfc25SMasahide NAKAMURA xdst->partner = NULL; 678157bfc25SMasahide NAKAMURA #endif 679aabc9761SHerbert Xu } 680aabc9761SHerbert Xu 681aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 682aabc9761SHerbert Xu 6831da177e4SLinus Torvalds struct sec_path 6841da177e4SLinus Torvalds { 6851da177e4SLinus Torvalds atomic_t refcnt; 6861da177e4SLinus Torvalds int len; 687dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 6881da177e4SLinus Torvalds }; 6891da177e4SLinus Torvalds 6901da177e4SLinus Torvalds static inline struct sec_path * 6911da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 6921da177e4SLinus Torvalds { 6931da177e4SLinus Torvalds if (sp) 6941da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 6951da177e4SLinus Torvalds return sp; 6961da177e4SLinus Torvalds } 6971da177e4SLinus Torvalds 6981da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 6991da177e4SLinus Torvalds 7001da177e4SLinus Torvalds static inline void 7011da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 7021da177e4SLinus Torvalds { 7031da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 7041da177e4SLinus Torvalds __secpath_destroy(sp); 7051da177e4SLinus Torvalds } 7061da177e4SLinus Torvalds 7071da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 7081da177e4SLinus Torvalds 7091da177e4SLinus Torvalds static inline void 7101da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 7111da177e4SLinus Torvalds { 7121da177e4SLinus Torvalds #ifdef CONFIG_XFRM 7131da177e4SLinus Torvalds secpath_put(skb->sp); 7141da177e4SLinus Torvalds skb->sp = NULL; 7151da177e4SLinus Torvalds #endif 7161da177e4SLinus Torvalds } 7171da177e4SLinus Torvalds 7181da177e4SLinus Torvalds static inline int 719a1e59abfSPatrick McHardy xfrm_addr_any(xfrm_address_t *addr, unsigned short family) 720a1e59abfSPatrick McHardy { 721a1e59abfSPatrick McHardy switch (family) { 722a1e59abfSPatrick McHardy case AF_INET: 723a1e59abfSPatrick McHardy return addr->a4 == 0; 724a1e59abfSPatrick McHardy case AF_INET6: 725a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 726a1e59abfSPatrick McHardy } 727a1e59abfSPatrick McHardy return 0; 728a1e59abfSPatrick McHardy } 729a1e59abfSPatrick McHardy 730a1e59abfSPatrick McHardy static inline int 7311da177e4SLinus Torvalds __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 7321da177e4SLinus Torvalds { 7331da177e4SLinus Torvalds return (tmpl->saddr.a4 && 7341da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 7351da177e4SLinus Torvalds } 7361da177e4SLinus Torvalds 7371da177e4SLinus Torvalds static inline int 7381da177e4SLinus Torvalds __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 7391da177e4SLinus Torvalds { 7401da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 7411da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 7421da177e4SLinus Torvalds } 7431da177e4SLinus Torvalds 7441da177e4SLinus Torvalds static inline int 7451da177e4SLinus Torvalds xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) 7461da177e4SLinus Torvalds { 7471da177e4SLinus Torvalds switch (family) { 7481da177e4SLinus Torvalds case AF_INET: 7491da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 7501da177e4SLinus Torvalds case AF_INET6: 7511da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 7521da177e4SLinus Torvalds } 7531da177e4SLinus Torvalds return !0; 7541da177e4SLinus Torvalds } 7551da177e4SLinus Torvalds 7561da177e4SLinus Torvalds #ifdef CONFIG_XFRM 7571da177e4SLinus Torvalds 7581da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 7591da177e4SLinus Torvalds 7601da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 7611da177e4SLinus Torvalds { 7621da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 7631da177e4SLinus Torvalds return __xfrm_policy_check(sk, dir, skb, family); 7641da177e4SLinus Torvalds 7652518c7c2SDavid S. Miller return (!xfrm_policy_count[dir] && !skb->sp) || 7661da177e4SLinus Torvalds (skb->dst->flags & DST_NOPOLICY) || 7671da177e4SLinus Torvalds __xfrm_policy_check(sk, dir, skb, family); 7681da177e4SLinus Torvalds } 7691da177e4SLinus Torvalds 7701da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 7711da177e4SLinus Torvalds { 7721da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 7731da177e4SLinus Torvalds } 7741da177e4SLinus Torvalds 7751da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 7761da177e4SLinus Torvalds { 7771da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 7781da177e4SLinus Torvalds } 7791da177e4SLinus Torvalds 7803e3850e9SPatrick McHardy extern int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family); 7811da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 7821da177e4SLinus Torvalds 7831da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 7841da177e4SLinus Torvalds { 7852518c7c2SDavid S. Miller return !xfrm_policy_count[XFRM_POLICY_OUT] || 7861da177e4SLinus Torvalds (skb->dst->flags & DST_NOXFRM) || 7871da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 7881da177e4SLinus Torvalds } 7891da177e4SLinus Torvalds 7901da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 7911da177e4SLinus Torvalds { 7921da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 7931da177e4SLinus Torvalds } 7941da177e4SLinus Torvalds 7951da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 7961da177e4SLinus Torvalds { 7971da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 7981da177e4SLinus Torvalds } 7991da177e4SLinus Torvalds 8001da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 8011da177e4SLinus Torvalds 8021da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 8031da177e4SLinus Torvalds { 8041da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 8051da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 8061da177e4SLinus Torvalds return 0; 8071da177e4SLinus Torvalds } 8081da177e4SLinus Torvalds 8094666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 8101da177e4SLinus Torvalds 8111da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 8121da177e4SLinus Torvalds { 8131da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 8141da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 8151da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 8161da177e4SLinus Torvalds } 8171da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 8181da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 8191da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 8201da177e4SLinus Torvalds } 8211da177e4SLinus Torvalds } 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds #else 8241da177e4SLinus Torvalds 8251da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 8261da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 8271da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 8281da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 8291da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 8301da177e4SLinus Torvalds { 8311da177e4SLinus Torvalds return 1; 8321da177e4SLinus Torvalds } 8331da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 8341da177e4SLinus Torvalds { 8351da177e4SLinus Torvalds return 1; 8361da177e4SLinus Torvalds } 8371da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 8381da177e4SLinus Torvalds { 8391da177e4SLinus Torvalds return 1; 8401da177e4SLinus Torvalds } 8411da177e4SLinus Torvalds #endif 8421da177e4SLinus Torvalds 8431da177e4SLinus Torvalds static __inline__ 8441da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) 8451da177e4SLinus Torvalds { 8461da177e4SLinus Torvalds switch (family){ 8471da177e4SLinus Torvalds case AF_INET: 8481da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_dst; 8491da177e4SLinus Torvalds case AF_INET6: 8501da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_dst; 8511da177e4SLinus Torvalds } 8521da177e4SLinus Torvalds return NULL; 8531da177e4SLinus Torvalds } 8541da177e4SLinus Torvalds 8551da177e4SLinus Torvalds static __inline__ 8561da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) 8571da177e4SLinus Torvalds { 8581da177e4SLinus Torvalds switch (family){ 8591da177e4SLinus Torvalds case AF_INET: 8601da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_src; 8611da177e4SLinus Torvalds case AF_INET6: 8621da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_src; 8631da177e4SLinus Torvalds } 8641da177e4SLinus Torvalds return NULL; 8651da177e4SLinus Torvalds } 8661da177e4SLinus Torvalds 8671da177e4SLinus Torvalds static __inline__ int 8681da177e4SLinus Torvalds __xfrm4_state_addr_check(struct xfrm_state *x, 8691da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 8701da177e4SLinus Torvalds { 8711da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 8721da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 8731da177e4SLinus Torvalds return 1; 8741da177e4SLinus Torvalds return 0; 8751da177e4SLinus Torvalds } 8761da177e4SLinus Torvalds 8771da177e4SLinus Torvalds static __inline__ int 8781da177e4SLinus Torvalds __xfrm6_state_addr_check(struct xfrm_state *x, 8791da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 8801da177e4SLinus Torvalds { 8811da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 8821da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 8831da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 8841da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 8851da177e4SLinus Torvalds return 1; 8861da177e4SLinus Torvalds return 0; 8871da177e4SLinus Torvalds } 8881da177e4SLinus Torvalds 8891da177e4SLinus Torvalds static __inline__ int 8901da177e4SLinus Torvalds xfrm_state_addr_check(struct xfrm_state *x, 8911da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 8921da177e4SLinus Torvalds unsigned short family) 8931da177e4SLinus Torvalds { 8941da177e4SLinus Torvalds switch (family) { 8951da177e4SLinus Torvalds case AF_INET: 8961da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 8971da177e4SLinus Torvalds case AF_INET6: 8981da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 8991da177e4SLinus Torvalds } 9001da177e4SLinus Torvalds return 0; 9011da177e4SLinus Torvalds } 9021da177e4SLinus Torvalds 903e53820deSMasahide NAKAMURA static __inline__ int 904e53820deSMasahide NAKAMURA xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, 905e53820deSMasahide NAKAMURA unsigned short family) 906e53820deSMasahide NAKAMURA { 907e53820deSMasahide NAKAMURA switch (family) { 908e53820deSMasahide NAKAMURA case AF_INET: 909e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 910e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_dst, 911e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_src); 912e53820deSMasahide NAKAMURA case AF_INET6: 913e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 914e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_dst, 915e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_src); 916e53820deSMasahide NAKAMURA } 917e53820deSMasahide NAKAMURA return 0; 918e53820deSMasahide NAKAMURA } 919e53820deSMasahide NAKAMURA 9201da177e4SLinus Torvalds static inline int xfrm_state_kern(struct xfrm_state *x) 9211da177e4SLinus Torvalds { 9221da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 9231da177e4SLinus Torvalds } 9241da177e4SLinus Torvalds 9255794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 9265794708fSMasahide NAKAMURA { 927dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 928dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 929dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 930dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 9315794708fSMasahide NAKAMURA } 9325794708fSMasahide NAKAMURA 9331da177e4SLinus Torvalds /* 9341da177e4SLinus Torvalds * xfrm algorithm information 9351da177e4SLinus Torvalds */ 9361da177e4SLinus Torvalds struct xfrm_algo_auth_info { 9371da177e4SLinus Torvalds u16 icv_truncbits; 9381da177e4SLinus Torvalds u16 icv_fullbits; 9391da177e4SLinus Torvalds }; 9401da177e4SLinus Torvalds 9411da177e4SLinus Torvalds struct xfrm_algo_encr_info { 9421da177e4SLinus Torvalds u16 blockbits; 9431da177e4SLinus Torvalds u16 defkeybits; 9441da177e4SLinus Torvalds }; 9451da177e4SLinus Torvalds 9461da177e4SLinus Torvalds struct xfrm_algo_comp_info { 9471da177e4SLinus Torvalds u16 threshold; 9481da177e4SLinus Torvalds }; 9491da177e4SLinus Torvalds 9501da177e4SLinus Torvalds struct xfrm_algo_desc { 9511da177e4SLinus Torvalds char *name; 95204ff1260SHerbert Xu char *compat; 9531da177e4SLinus Torvalds u8 available:1; 9541da177e4SLinus Torvalds union { 9551da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 9561da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 9571da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 9581da177e4SLinus Torvalds } uinfo; 9591da177e4SLinus Torvalds struct sadb_alg desc; 9601da177e4SLinus Torvalds }; 9611da177e4SLinus Torvalds 9621da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 9631da177e4SLinus Torvalds struct xfrm_tunnel { 9641da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 965d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, __u32 info); 966d2acc347SHerbert Xu 967d2acc347SHerbert Xu struct xfrm_tunnel *next; 968d2acc347SHerbert Xu int priority; 9691da177e4SLinus Torvalds }; 9701da177e4SLinus Torvalds 9711da177e4SLinus Torvalds struct xfrm6_tunnel { 972d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 973d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 97404ce6909SAl Viro int type, int code, int offset, __be32 info); 975d2acc347SHerbert Xu struct xfrm6_tunnel *next; 976d2acc347SHerbert Xu int priority; 9771da177e4SLinus Torvalds }; 9781da177e4SLinus Torvalds 9791da177e4SLinus Torvalds extern void xfrm_init(void); 9801da177e4SLinus Torvalds extern void xfrm4_init(void); 9811da177e4SLinus Torvalds extern void xfrm6_init(void); 9821da177e4SLinus Torvalds extern void xfrm6_fini(void); 9831da177e4SLinus Torvalds extern void xfrm_state_init(void); 9841da177e4SLinus Torvalds extern void xfrm4_state_init(void); 9851da177e4SLinus Torvalds extern void xfrm6_state_init(void); 9861da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 9871da177e4SLinus Torvalds 9881da177e4SLinus Torvalds extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *); 9891da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_alloc(void); 9901da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, 9911da177e4SLinus Torvalds struct flowi *fl, struct xfrm_tmpl *tmpl, 9921da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 9931da177e4SLinus Torvalds unsigned short family); 994628529b6SJamal Hadi Salim extern struct xfrm_state * xfrm_stateonly_find(xfrm_address_t *daddr, 995628529b6SJamal Hadi Salim xfrm_address_t *saddr, 996628529b6SJamal Hadi Salim unsigned short family, 997628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 9981da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 9991da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 10001da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 10011da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1002a94cfd19SAl Viro extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family); 1003eb2971b6SMasahide NAKAMURA extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); 100441a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 100541a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 100641a49cc3SMasahide NAKAMURA int n, unsigned short family); 100741a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 100841a49cc3SMasahide NAKAMURA int n, unsigned short family); 100941a49cc3SMasahide NAKAMURA #else 101041a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 101141a49cc3SMasahide NAKAMURA int n, unsigned short family) 101241a49cc3SMasahide NAKAMURA { 101341a49cc3SMasahide NAKAMURA return -ENOSYS; 101441a49cc3SMasahide NAKAMURA } 101541a49cc3SMasahide NAKAMURA 101641a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 101741a49cc3SMasahide NAKAMURA int n, unsigned short family) 101841a49cc3SMasahide NAKAMURA { 101941a49cc3SMasahide NAKAMURA return -ENOSYS; 102041a49cc3SMasahide NAKAMURA } 102141a49cc3SMasahide NAKAMURA #endif 1022af11e316SJamal Hadi Salim 1023af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1024af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1025af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1026af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1027af11e316SJamal Hadi Salim }; 1028af11e316SJamal Hadi Salim 10295a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 10305a6d3416SJamal Hadi Salim u32 incnt; 10315a6d3416SJamal Hadi Salim u32 outcnt; 10325a6d3416SJamal Hadi Salim u32 fwdcnt; 10335a6d3416SJamal Hadi Salim u32 inscnt; 10345a6d3416SJamal Hadi Salim u32 outscnt; 10355a6d3416SJamal Hadi Salim u32 fwdscnt; 10365a6d3416SJamal Hadi Salim u32 spdhcnt; 10375a6d3416SJamal Hadi Salim u32 spdhmcnt; 10385a6d3416SJamal Hadi Salim }; 10395a6d3416SJamal Hadi Salim 10401da177e4SLinus Torvalds extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq); 104126b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 10424aa2e62cSJoy Latten extern int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info); 1043af11e316SJamal Hadi Salim extern void xfrm_sad_getinfo(struct xfrmk_sadinfo *si); 10445a6d3416SJamal Hadi Salim extern void xfrm_spd_getinfo(struct xfrmk_spdinfo *si); 1045a252cc23SAl Viro extern int xfrm_replay_check(struct xfrm_state *x, __be32 seq); 104661f4627bSAl Viro extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); 1047f8cd5488SJamal Hadi Salim extern void xfrm_replay_notify(struct xfrm_state *x, int event); 10481da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 104972cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1050406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 1051c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1052c4541b41SHerbert Xu int encap_type); 10531da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1054c4541b41SHerbert Xu 1055c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1056c4541b41SHerbert Xu { 1057c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1058c4541b41SHerbert Xu } 1059c4541b41SHerbert Xu 10601da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 1061c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1062c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 106333b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1064e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1065fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1066fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 106773d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 106873d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 10698c689a6eSAl Viro extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); 10701da177e4SLinus Torvalds extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); 10718c689a6eSAl Viro extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); 10721da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 1073aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1074aee5adb4SMasahide NAKAMURA u8 **prevhdr); 10751da177e4SLinus Torvalds 10761da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1077067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 10781da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 10791da177e4SLinus Torvalds extern int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family); 10801da177e4SLinus Torvalds #else 10811da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 10821da177e4SLinus Torvalds { 10831da177e4SLinus Torvalds return -ENOPROTOOPT; 10841da177e4SLinus Torvalds } 10851da177e4SLinus Torvalds 1086067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 10871da177e4SLinus Torvalds { 10881da177e4SLinus Torvalds /* should not happen */ 10891da177e4SLinus Torvalds kfree_skb(skb); 10901da177e4SLinus Torvalds return 0; 10911da177e4SLinus Torvalds } 1092067b207bSJames Chapman 10931da177e4SLinus Torvalds static inline int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family) 10941da177e4SLinus Torvalds { 10951da177e4SLinus Torvalds return -EINVAL; 10961da177e4SLinus Torvalds } 10971da177e4SLinus Torvalds #endif 10981da177e4SLinus Torvalds 1099dd0fc66fSAl Viro struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp); 11004e81bb83SMasahide NAKAMURA extern int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*), void *); 11011da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 11024e81bb83SMasahide NAKAMURA struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir, 11034e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1104ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1105ef41aaa0SEric Paris int *err); 1106ef41aaa0SEric Paris struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete, int *err); 11074aa2e62cSJoy Latten int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); 11081da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1109658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 11101da177e4SLinus Torvalds struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto, 11111da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 11121da177e4SLinus Torvalds int create, unsigned short family); 11134aa2e62cSJoy Latten extern int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); 11141da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 11155b368e61SVenkat Yekkirala extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, 11165b368e61SVenkat Yekkirala struct flowi *fl, int family, int strict); 11171da177e4SLinus Torvalds extern void xfrm_init_pmtu(struct dst_entry *dst); 11181da177e4SLinus Torvalds 111980c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 112080c9abaaSShinta Sugimoto extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 112180c9abaaSShinta Sugimoto struct xfrm_migrate *m, int num_bundles); 112280c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 112380c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 112480c9abaaSShinta Sugimoto struct xfrm_migrate *m); 112580c9abaaSShinta Sugimoto extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 112680c9abaaSShinta Sugimoto struct xfrm_migrate *m, int num_bundles); 112780c9abaaSShinta Sugimoto #endif 112880c9abaaSShinta Sugimoto 11291da177e4SLinus Torvalds extern wait_queue_head_t km_waitq; 11305d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 11316c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 113297a64b45SMasahide NAKAMURA extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 11331da177e4SLinus Torvalds 11341da177e4SLinus Torvalds extern void xfrm_input_init(void); 11356067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 11361da177e4SLinus Torvalds 11371da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 11381da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 11391da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 11401da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 11411da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 11421da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 11431da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 11441da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 11451da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); 11461da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); 11471da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); 11481da177e4SLinus Torvalds 114907d4ee58SHerbert Xu struct hash_desc; 11509409f38aSHerbert Xu struct scatterlist; 115107d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 115207d4ee58SHerbert Xu unsigned int); 11531da177e4SLinus Torvalds 115407d4ee58SHerbert Xu extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, 11551da177e4SLinus Torvalds int offset, int len, icv_update_fn_t icv_update); 11561da177e4SLinus Torvalds 11571da177e4SLinus Torvalds static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, 11581da177e4SLinus Torvalds int family) 11591da177e4SLinus Torvalds { 11601da177e4SLinus Torvalds switch (family) { 11611da177e4SLinus Torvalds default: 11621da177e4SLinus Torvalds case AF_INET: 11638c689a6eSAl Viro return (__force __u32)a->a4 - (__force __u32)b->a4; 11641da177e4SLinus Torvalds case AF_INET6: 11651da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 11661da177e4SLinus Torvalds (struct in6_addr *)b); 11671da177e4SLinus Torvalds } 11681da177e4SLinus Torvalds } 11691da177e4SLinus Torvalds 117077d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 117177d8d7a6SHerbert Xu { 117277d8d7a6SHerbert Xu return index & 7; 117377d8d7a6SHerbert Xu } 117477d8d7a6SHerbert Xu 1175f8cd5488SJamal Hadi Salim static inline int xfrm_aevent_is_on(void) 1176f8cd5488SJamal Hadi Salim { 1177be33690dSPatrick McHardy struct sock *nlsk; 1178be33690dSPatrick McHardy int ret = 0; 1179be33690dSPatrick McHardy 1180be33690dSPatrick McHardy rcu_read_lock(); 1181be33690dSPatrick McHardy nlsk = rcu_dereference(xfrm_nl); 1182be33690dSPatrick McHardy if (nlsk) 1183be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1184be33690dSPatrick McHardy rcu_read_unlock(); 1185be33690dSPatrick McHardy return ret; 1186f8cd5488SJamal Hadi Salim } 1187f8cd5488SJamal Hadi Salim 118880c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 118980c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 119080c9abaaSShinta Sugimoto { 119180c9abaaSShinta Sugimoto return (struct xfrm_algo *)kmemdup(orig, sizeof(*orig) + orig->alg_key_len, GFP_KERNEL); 119280c9abaaSShinta Sugimoto } 119380c9abaaSShinta Sugimoto 119480c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 119580c9abaaSShinta Sugimoto { 119680c9abaaSShinta Sugimoto int i; 119780c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 119880c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 119980c9abaaSShinta Sugimoto } 120080c9abaaSShinta Sugimoto 120180c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 120280c9abaaSShinta Sugimoto { 120380c9abaaSShinta Sugimoto int i; 120480c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 120580c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 120680c9abaaSShinta Sugimoto } 120780c9abaaSShinta Sugimoto #endif 1208f8cd5488SJamal Hadi Salim 12091da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1210