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; 40a37ae408SPavel Emelyanov extern int sysctl_xfrm_larval_drop; 41a37ae408SPavel Emelyanov extern u32 sysctl_xfrm_acq_expires; 42f8cd5488SJamal Hadi Salim 434a3e2f71SArjan van de Ven extern struct mutex xfrm_cfg_mutex; 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds /* Organization of SPD aka "XFRM rules" 461da177e4SLinus Torvalds ------------------------------------ 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds Basic objects: 491da177e4SLinus Torvalds - policy rule, struct xfrm_policy (=SPD entry) 501da177e4SLinus Torvalds - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) 511da177e4SLinus Torvalds - instance of a transformer, struct xfrm_state (=SA) 521da177e4SLinus Torvalds - template to clone xfrm_state, struct xfrm_tmpl 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds SPD is plain linear list of xfrm_policy rules, ordered by priority. 551da177e4SLinus Torvalds (To be compatible with existing pfkeyv2 implementations, 561da177e4SLinus Torvalds many rules with priority of 0x7fffffff are allowed to exist and 571da177e4SLinus Torvalds such rules are ordered in an unpredictable way, thanks to bsd folks.) 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds Lookup is plain linear search until the first match with selector. 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds If "action" is "block", then we prohibit the flow, otherwise: 621da177e4SLinus Torvalds if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, 631da177e4SLinus Torvalds policy entry has list of up to XFRM_MAX_DEPTH transformations, 641da177e4SLinus Torvalds described by templates xfrm_tmpl. Each template is resolved 651da177e4SLinus Torvalds to a complete xfrm_state (see below) and we pack bundle of transformations 661da177e4SLinus Torvalds to a dst_entry returned to requestor. 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds dst -. xfrm .-> xfrm_state #1 691da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #2 701da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #3 711da177e4SLinus Torvalds |---. child .-> NULL 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds Bundles are cached at xrfm_policy struct (field ->bundles). 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds Resolution of xrfm_tmpl 771da177e4SLinus Torvalds ----------------------- 781da177e4SLinus Torvalds Template contains: 791da177e4SLinus Torvalds 1. ->mode Mode: transport or tunnel 801da177e4SLinus Torvalds 2. ->id.proto Protocol: AH/ESP/IPCOMP 811da177e4SLinus Torvalds 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. 821da177e4SLinus Torvalds Q: allow to resolve security gateway? 831da177e4SLinus Torvalds 4. ->id.spi If not zero, static SPI. 841da177e4SLinus Torvalds 5. ->saddr Local tunnel endpoint, ignored for transport mode. 851da177e4SLinus Torvalds 6. ->algos List of allowed algos. Plain bitmask now. 861da177e4SLinus Torvalds Q: ealgos, aalgos, calgos. What a mess... 871da177e4SLinus Torvalds 7. ->share Sharing mode. 881da177e4SLinus Torvalds Q: how to implement private sharing mode? To add struct sock* to 891da177e4SLinus Torvalds flow id? 901da177e4SLinus Torvalds 911da177e4SLinus Torvalds Having this template we search through SAD searching for entries 921da177e4SLinus Torvalds with appropriate mode/proto/algo, permitted by selector. 931da177e4SLinus Torvalds If no appropriate entry found, it is requested from key manager. 941da177e4SLinus Torvalds 951da177e4SLinus Torvalds PROBLEMS: 961da177e4SLinus Torvalds Q: How to find all the bundles referring to a physical path for 971da177e4SLinus Torvalds PMTU discovery? Seems, dst should contain list of all parents... 981da177e4SLinus Torvalds and enter to infinite locking hierarchy disaster. 991da177e4SLinus Torvalds No! It is easier, we will not search for them, let them find us. 1001da177e4SLinus Torvalds We add genid to each dst plus pointer to genid of raw IP route, 1011da177e4SLinus Torvalds pmtu disc will update pmtu on raw IP route and increase its genid. 1021da177e4SLinus Torvalds dst_check() will see this for top level and trigger resyncing 1031da177e4SLinus Torvalds metrics. Plus, it will be made via sk->sk_dst_cache. Solved. 1041da177e4SLinus Torvalds */ 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds /* Full description of state of transformer. */ 1071da177e4SLinus Torvalds struct xfrm_state 1081da177e4SLinus Torvalds { 1091da177e4SLinus Torvalds /* Note: bydst is re-used during gc */ 1108f126e37SDavid S. Miller struct hlist_node bydst; 1118f126e37SDavid S. Miller struct hlist_node bysrc; 1128f126e37SDavid S. Miller struct hlist_node byspi; 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds atomic_t refcnt; 1151da177e4SLinus Torvalds spinlock_t lock; 1161da177e4SLinus Torvalds 1171da177e4SLinus Torvalds struct xfrm_id id; 1181da177e4SLinus Torvalds struct xfrm_selector sel; 1191da177e4SLinus Torvalds 1209d4a706dSDavid S. Miller u32 genid; 1219d4a706dSDavid S. Miller 1221da177e4SLinus Torvalds /* Key manger bits */ 1231da177e4SLinus Torvalds struct { 1241da177e4SLinus Torvalds u8 state; 1251da177e4SLinus Torvalds u8 dying; 1261da177e4SLinus Torvalds u32 seq; 1271da177e4SLinus Torvalds } km; 1281da177e4SLinus Torvalds 1291da177e4SLinus Torvalds /* Parameters of this state. */ 1301da177e4SLinus Torvalds struct { 1311da177e4SLinus Torvalds u32 reqid; 1321da177e4SLinus Torvalds u8 mode; 1331da177e4SLinus Torvalds u8 replay_window; 1341da177e4SLinus Torvalds u8 aalgo, ealgo, calgo; 1351da177e4SLinus Torvalds u8 flags; 1361da177e4SLinus Torvalds u16 family; 1371da177e4SLinus Torvalds xfrm_address_t saddr; 1381da177e4SLinus Torvalds int header_len; 1391da177e4SLinus Torvalds int trailer_len; 1401da177e4SLinus Torvalds } props; 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds /* Data for transformer */ 1451da177e4SLinus Torvalds struct xfrm_algo *aalg; 1461da177e4SLinus Torvalds struct xfrm_algo *ealg; 1471da177e4SLinus Torvalds struct xfrm_algo *calg; 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds /* Data for encapsulator */ 1501da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 1511da177e4SLinus Torvalds 152060f02a3SNoriaki TAKAMIYA /* Data for care-of address */ 153060f02a3SNoriaki TAKAMIYA xfrm_address_t *coaddr; 154060f02a3SNoriaki TAKAMIYA 1551da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1561da177e4SLinus Torvalds struct xfrm_state *tunnel; 1571da177e4SLinus Torvalds 1581da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1591da177e4SLinus Torvalds atomic_t tunnel_users; 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds /* State for replay detection */ 1621da177e4SLinus Torvalds struct xfrm_replay_state replay; 1631da177e4SLinus Torvalds 164f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 165f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 166f8cd5488SJamal Hadi Salim 1672717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 1682717096aSJamal Hadi Salim * moment 1692717096aSJamal Hadi Salim */ 1702717096aSJamal Hadi Salim u32 xflags; 1712717096aSJamal Hadi Salim 172f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 173f8cd5488SJamal Hadi Salim u32 replay_maxage; 174f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 175f8cd5488SJamal Hadi Salim 176f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 177f8cd5488SJamal Hadi Salim struct timer_list rtimer; 178f8cd5488SJamal Hadi Salim 1791da177e4SLinus Torvalds /* Statistics */ 1801da177e4SLinus Torvalds struct xfrm_stats stats; 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 1831da177e4SLinus Torvalds struct timer_list timer; 1841da177e4SLinus Torvalds 1859afaca05SMasahide NAKAMURA /* Last used time */ 186d26f3984SHerbert Xu unsigned long lastused; 1879afaca05SMasahide NAKAMURA 1881da177e4SLinus Torvalds /* Reference to data common to all the instances of this 1891da177e4SLinus Torvalds * transformer. */ 1901da177e4SLinus Torvalds struct xfrm_type *type; 19113996378SHerbert Xu struct xfrm_mode *inner_mode; 19213996378SHerbert Xu struct xfrm_mode *outer_mode; 1931da177e4SLinus Torvalds 194df71837dSTrent Jaeger /* Security context */ 195df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 196df71837dSTrent Jaeger 1971da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 1981da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 1991da177e4SLinus Torvalds void *data; 2001da177e4SLinus Torvalds }; 2011da177e4SLinus Torvalds 2022717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2032717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 2042717096aSJamal Hadi Salim 2051da177e4SLinus Torvalds enum { 2061da177e4SLinus Torvalds XFRM_STATE_VOID, 2071da177e4SLinus Torvalds XFRM_STATE_ACQ, 2081da177e4SLinus Torvalds XFRM_STATE_VALID, 2091da177e4SLinus Torvalds XFRM_STATE_ERROR, 2101da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2111da177e4SLinus Torvalds XFRM_STATE_DEAD 2121da177e4SLinus Torvalds }; 2131da177e4SLinus Torvalds 21426b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 21526b15dadSJamal Hadi Salim struct km_event 21626b15dadSJamal Hadi Salim { 217bf08867fSHerbert Xu union { 218bf08867fSHerbert Xu u32 hard; 219bf08867fSHerbert Xu u32 proto; 220bf08867fSHerbert Xu u32 byid; 221f8cd5488SJamal Hadi Salim u32 aevent; 222f7b6983fSMasahide NAKAMURA u32 type; 223bf08867fSHerbert Xu } data; 224bf08867fSHerbert Xu 22526b15dadSJamal Hadi Salim u32 seq; 22626b15dadSJamal Hadi Salim u32 pid; 22726b15dadSJamal Hadi Salim u32 event; 22826b15dadSJamal Hadi Salim }; 22926b15dadSJamal Hadi Salim 23025ee3286SHerbert Xu struct net_device; 2311da177e4SLinus Torvalds struct xfrm_type; 2321da177e4SLinus Torvalds struct xfrm_dst; 2331da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2341da177e4SLinus Torvalds unsigned short family; 2351da177e4SLinus Torvalds struct dst_ops *dst_ops; 2361da177e4SLinus Torvalds void (*garbage_collect)(void); 23766cdb3caSHerbert Xu struct dst_entry *(*dst_lookup)(int tos, xfrm_address_t *saddr, 23866cdb3caSHerbert Xu xfrm_address_t *daddr); 239a1e59abfSPatrick McHardy int (*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr); 2401da177e4SLinus Torvalds struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); 2411da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 2421da177e4SLinus Torvalds struct flowi *fl); 24325ee3286SHerbert Xu int (*get_tos)(struct flowi *fl); 24425ee3286SHerbert Xu int (*fill_dst)(struct xfrm_dst *xdst, 24525ee3286SHerbert Xu struct net_device *dev); 2461da177e4SLinus Torvalds }; 2471da177e4SLinus Torvalds 2481da177e4SLinus Torvalds extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 2491da177e4SLinus Torvalds extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 25026b15dadSJamal Hadi Salim extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); 25126b15dadSJamal Hadi Salim extern void km_state_notify(struct xfrm_state *x, struct km_event *c); 2521da177e4SLinus Torvalds 2531da177e4SLinus Torvalds struct xfrm_tmpl; 254980ebd25SJamal Hadi Salim extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 25553bc6b4dSJamal Hadi Salim extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); 25653bc6b4dSJamal Hadi Salim extern int __xfrm_state_delete(struct xfrm_state *x); 25753bc6b4dSJamal Hadi Salim 2581da177e4SLinus Torvalds struct xfrm_state_afinfo { 25917c2a42aSHerbert Xu unsigned int family; 26036cf9acfSHerbert Xu unsigned int proto; 261227620e2SHerbert Xu unsigned int eth_proto; 262862b82c6SHerbert Xu unsigned int nf_post_routing; 26317c2a42aSHerbert Xu struct module *owner; 264aa5d62ccSHerbert Xu struct xfrm_type *type_map[IPPROTO_MAX]; 265aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 266d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 2671da177e4SLinus Torvalds void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, 2681da177e4SLinus Torvalds struct xfrm_tmpl *tmpl, 2691da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr); 27041a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 27141a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 272cdca7265SMiika Komu int (*output)(struct sk_buff *skb); 273227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 274227620e2SHerbert Xu struct sk_buff *skb); 27536cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 27636cf9acfSHerbert Xu struct sk_buff *skb); 277716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 278716062fdSHerbert Xu int async); 2791da177e4SLinus Torvalds }; 2801da177e4SLinus Torvalds 2811da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 2821da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 2831da177e4SLinus Torvalds 2841da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 2851da177e4SLinus Torvalds 2861da177e4SLinus Torvalds struct xfrm_type 2871da177e4SLinus Torvalds { 2881da177e4SLinus Torvalds char *description; 2891da177e4SLinus Torvalds struct module *owner; 2901da177e4SLinus Torvalds __u8 proto; 2911b5c2299SMasahide NAKAMURA __u8 flags; 2921b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 293436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 294f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 295f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 2961da177e4SLinus Torvalds 29772cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 2981da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 299e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3001da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 301df0ba92aSMasahide NAKAMURA int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); 302aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3031da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 304c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3051da177e4SLinus Torvalds }; 3061da177e4SLinus Torvalds 3071da177e4SLinus Torvalds extern int xfrm_register_type(struct xfrm_type *type, unsigned short family); 3081da177e4SLinus Torvalds extern int xfrm_unregister_type(struct xfrm_type *type, unsigned short family); 3091da177e4SLinus Torvalds 310b59f45d0SHerbert Xu struct xfrm_mode { 311227620e2SHerbert Xu /* 312227620e2SHerbert Xu * Remove encapsulation header. 313227620e2SHerbert Xu * 314227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 315227620e2SHerbert Xu * header. 316227620e2SHerbert Xu * 317227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 318227620e2SHerbert Xu * should be and the network header shall be set to where the IP 319227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 320227620e2SHerbert Xu * payload. 321227620e2SHerbert Xu */ 322227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 323227620e2SHerbert Xu 324227620e2SHerbert Xu /* 325227620e2SHerbert Xu * This is the actual input entry point. 326227620e2SHerbert Xu * 327227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 328227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 329227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 330227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 331227620e2SHerbert Xu */ 332b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 33337fedd3aSHerbert Xu 33437fedd3aSHerbert Xu /* 33537fedd3aSHerbert Xu * Add encapsulation header. 33637fedd3aSHerbert Xu * 33737fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 33837fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 33937fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 34037fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 34137fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 34237fedd3aSHerbert Xu * header. The value of the network header will always point 34337fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 34437fedd3aSHerbert Xu */ 34536cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 34636cf9acfSHerbert Xu 34736cf9acfSHerbert Xu /* 34836cf9acfSHerbert Xu * This is the actual output entry point. 34936cf9acfSHerbert Xu * 35036cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 35136cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 35236cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 35336cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 35436cf9acfSHerbert Xu * call output2. 35536cf9acfSHerbert Xu */ 356eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 357b59f45d0SHerbert Xu 35817c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 359b59f45d0SHerbert Xu struct module *owner; 360b59f45d0SHerbert Xu unsigned int encap; 3611bfcb10fSHerbert Xu int flags; 3621bfcb10fSHerbert Xu }; 3631bfcb10fSHerbert Xu 3641bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 3651bfcb10fSHerbert Xu enum { 3661bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 367b59f45d0SHerbert Xu }; 368b59f45d0SHerbert Xu 369b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 370b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 371b59f45d0SHerbert Xu 3721da177e4SLinus Torvalds struct xfrm_tmpl 3731da177e4SLinus Torvalds { 3741da177e4SLinus Torvalds /* id in template is interpreted as: 3751da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 3761da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 3771da177e4SLinus Torvalds * daddr must be fixed too. 3781da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 3791da177e4SLinus Torvalds */ 3801da177e4SLinus Torvalds struct xfrm_id id; 3811da177e4SLinus Torvalds 3821da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 3831da177e4SLinus Torvalds xfrm_address_t saddr; 3841da177e4SLinus Torvalds 38576b3f055SMiika Komu unsigned short encap_family; 38676b3f055SMiika Komu 3871da177e4SLinus Torvalds __u32 reqid; 3881da177e4SLinus Torvalds 3897e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 3901da177e4SLinus Torvalds __u8 mode; 3911da177e4SLinus Torvalds 3921da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 3931da177e4SLinus Torvalds __u8 share; 3941da177e4SLinus Torvalds 3951da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 3961da177e4SLinus Torvalds __u8 optional; 3971da177e4SLinus Torvalds 3981da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 3991da177e4SLinus Torvalds __u32 aalgos; 4001da177e4SLinus Torvalds __u32 ealgos; 4011da177e4SLinus Torvalds __u32 calgos; 4021da177e4SLinus Torvalds }; 4031da177e4SLinus Torvalds 404622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 4051da177e4SLinus Torvalds 4061da177e4SLinus Torvalds struct xfrm_policy 4071da177e4SLinus Torvalds { 4081da177e4SLinus Torvalds struct xfrm_policy *next; 4092518c7c2SDavid S. Miller struct hlist_node bydst; 4102518c7c2SDavid S. Miller struct hlist_node byidx; 4111da177e4SLinus Torvalds 4121da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 4131da177e4SLinus Torvalds rwlock_t lock; 4141da177e4SLinus Torvalds atomic_t refcnt; 4151da177e4SLinus Torvalds struct timer_list timer; 4161da177e4SLinus Torvalds 4171da177e4SLinus Torvalds u32 priority; 4181da177e4SLinus Torvalds u32 index; 4191da177e4SLinus Torvalds struct xfrm_selector selector; 4201da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 4211da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 4221da177e4SLinus Torvalds struct dst_entry *bundles; 42346ca5f5dSArnaldo Carvalho de Melo u16 family; 42446ca5f5dSArnaldo Carvalho de Melo u8 type; 42546ca5f5dSArnaldo Carvalho de Melo u8 action; 42646ca5f5dSArnaldo Carvalho de Melo u8 flags; 42746ca5f5dSArnaldo Carvalho de Melo u8 dead; 42846ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 42946ca5f5dSArnaldo Carvalho de Melo /* XXX 1 byte hole, try to pack */ 430df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 4311da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 4321da177e4SLinus Torvalds }; 4331da177e4SLinus Torvalds 43480c9abaaSShinta Sugimoto struct xfrm_migrate { 43580c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 43680c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 43780c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 43880c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 43980c9abaaSShinta Sugimoto u8 proto; 44080c9abaaSShinta Sugimoto u8 mode; 44180c9abaaSShinta Sugimoto u16 reserved; 44280c9abaaSShinta Sugimoto u32 reqid; 44380c9abaaSShinta Sugimoto u16 old_family; 44480c9abaaSShinta Sugimoto u16 new_family; 44580c9abaaSShinta Sugimoto }; 44680c9abaaSShinta Sugimoto 4471da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 448f8cd5488SJamal Hadi Salim /* which seqno */ 449f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 450f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 451f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 452f8cd5488SJamal Hadi Salim /* what happened */ 453f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 454f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 455f8cd5488SJamal Hadi Salim 456f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 457f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 458f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 459f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 460f8cd5488SJamal Hadi Salim /* default seq threshold size */ 461f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 4621da177e4SLinus Torvalds 4631da177e4SLinus Torvalds struct xfrm_mgr 4641da177e4SLinus Torvalds { 4651da177e4SLinus Torvalds struct list_head list; 4661da177e4SLinus Torvalds char *id; 46726b15dadSJamal Hadi Salim int (*notify)(struct xfrm_state *x, struct km_event *c); 4681da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 469cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 4705d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 47126b15dadSJamal Hadi Salim int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); 47297a64b45SMasahide NAKAMURA int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 47380c9abaaSShinta Sugimoto int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles); 4741da177e4SLinus Torvalds }; 4751da177e4SLinus Torvalds 4761da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 4771da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 4781da177e4SLinus Torvalds 4792518c7c2SDavid S. Miller extern unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2]; 4801da177e4SLinus Torvalds 481436a0a40SHerbert Xu /* 482436a0a40SHerbert Xu * This structure is used for the duration where packets are being 483436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 484436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 485436a0a40SHerbert Xu */ 486436a0a40SHerbert Xu struct xfrm_skb_cb { 487436a0a40SHerbert Xu union { 488436a0a40SHerbert Xu struct inet_skb_parm h4; 489436a0a40SHerbert Xu struct inet6_skb_parm h6; 490436a0a40SHerbert Xu } header; 491436a0a40SHerbert Xu 492436a0a40SHerbert Xu /* Sequence number for replay protection. */ 493436a0a40SHerbert Xu u64 seq; 494436a0a40SHerbert Xu }; 495436a0a40SHerbert Xu 496436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 497436a0a40SHerbert Xu 49836cf9acfSHerbert Xu /* 49936cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 50036cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 50136cf9acfSHerbert Xu */ 50236cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 50336cf9acfSHerbert Xu union { 50436cf9acfSHerbert Xu struct inet_skb_parm h4; 50536cf9acfSHerbert Xu struct inet6_skb_parm h6; 50636cf9acfSHerbert Xu } header; 50736cf9acfSHerbert Xu 50836cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 50936cf9acfSHerbert Xu __be16 id; 51036cf9acfSHerbert Xu __be16 frag_off; 51136cf9acfSHerbert Xu 51236cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 51336cf9acfSHerbert Xu u8 tos; 51436cf9acfSHerbert Xu 51536cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 51636cf9acfSHerbert Xu u8 ttl; 51736cf9acfSHerbert Xu 51836cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 51936cf9acfSHerbert Xu u8 protocol; 52036cf9acfSHerbert Xu 52136cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 52236cf9acfSHerbert Xu u8 flow_lbl[3]; 52336cf9acfSHerbert Xu }; 52436cf9acfSHerbert Xu 52536cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 52636cf9acfSHerbert Xu 527716062fdSHerbert Xu /* 528716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 529716062fdSHerbert Xu * related information. 530716062fdSHerbert Xu */ 531716062fdSHerbert Xu struct xfrm_spi_skb_cb { 532716062fdSHerbert Xu union { 533716062fdSHerbert Xu struct inet_skb_parm h4; 534716062fdSHerbert Xu struct inet6_skb_parm h6; 535716062fdSHerbert Xu } header; 536716062fdSHerbert Xu 537716062fdSHerbert Xu unsigned int daddroff; 538716062fdSHerbert Xu }; 539716062fdSHerbert Xu 540716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 541716062fdSHerbert Xu 542161a09e7SJoy Latten /* Audit Information */ 543161a09e7SJoy Latten struct xfrm_audit 544161a09e7SJoy Latten { 545ab5f5e8bSJoy Latten u32 loginuid; 546161a09e7SJoy Latten u32 secid; 547161a09e7SJoy Latten }; 548c9204d9cSJoy Latten 549c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 550ab5f5e8bSJoy Latten static inline struct audit_buffer *xfrm_audit_start(u32 auid, u32 sid) 551ab5f5e8bSJoy Latten { 552ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 553ab5f5e8bSJoy Latten char *secctx; 554ab5f5e8bSJoy Latten u32 secctx_len; 555ab5f5e8bSJoy Latten 556ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 557ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 558ab5f5e8bSJoy Latten if (audit_buf == NULL) 559ab5f5e8bSJoy Latten return NULL; 560ab5f5e8bSJoy Latten 561ab5f5e8bSJoy Latten audit_log_format(audit_buf, "auid=%u", auid); 562ab5f5e8bSJoy Latten 563ab5f5e8bSJoy Latten if (sid != 0 && 564ab5f5e8bSJoy Latten security_secid_to_secctx(sid, &secctx, &secctx_len) == 0) { 565ab5f5e8bSJoy Latten audit_log_format(audit_buf, " subj=%s", secctx); 566ab5f5e8bSJoy Latten security_release_secctx(secctx, secctx_len); 567ab5f5e8bSJoy Latten } else 568ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 569ab5f5e8bSJoy Latten return audit_buf; 570ab5f5e8bSJoy Latten } 571ab5f5e8bSJoy Latten 572ab5f5e8bSJoy Latten extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 573ab5f5e8bSJoy Latten u32 auid, u32 sid); 574ab5f5e8bSJoy Latten extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 575ab5f5e8bSJoy Latten u32 auid, u32 sid); 576ab5f5e8bSJoy Latten extern void xfrm_audit_state_add(struct xfrm_state *x, int result, 577ab5f5e8bSJoy Latten u32 auid, u32 sid); 578ab5f5e8bSJoy Latten extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, 579ab5f5e8bSJoy Latten u32 auid, u32 sid); 580c9204d9cSJoy Latten #else 581ab5f5e8bSJoy Latten #define xfrm_audit_policy_add(x, r, a, s) do { ; } while (0) 582ab5f5e8bSJoy Latten #define xfrm_audit_policy_delete(x, r, a, s) do { ; } while (0) 583ab5f5e8bSJoy Latten #define xfrm_audit_state_add(x, r, a, s) do { ; } while (0) 584ab5f5e8bSJoy Latten #define xfrm_audit_state_delete(x, r, a, s) do { ; } while (0) 585c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 586161a09e7SJoy Latten 5871da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 5881da177e4SLinus Torvalds { 5891da177e4SLinus Torvalds if (likely(policy != NULL)) 5901da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 5911da177e4SLinus Torvalds } 5921da177e4SLinus Torvalds 5931da177e4SLinus Torvalds extern void __xfrm_policy_destroy(struct xfrm_policy *policy); 5941da177e4SLinus Torvalds 5951da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 5961da177e4SLinus Torvalds { 5971da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 5981da177e4SLinus Torvalds __xfrm_policy_destroy(policy); 5991da177e4SLinus Torvalds } 6001da177e4SLinus Torvalds 6014e81bb83SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 6024e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 6034e81bb83SMasahide NAKAMURA { 6044e81bb83SMasahide NAKAMURA int i; 6054e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 6064e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 6074e81bb83SMasahide NAKAMURA } 6084e81bb83SMasahide NAKAMURA #else 6094e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 6104e81bb83SMasahide NAKAMURA { 6114e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[0]); 6124e81bb83SMasahide NAKAMURA } 6134e81bb83SMasahide NAKAMURA #endif 6144e81bb83SMasahide NAKAMURA 6151da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 6161da177e4SLinus Torvalds 61721380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 61821380b81SHerbert Xu { 61921380b81SHerbert Xu atomic_dec(&x->refcnt); 62021380b81SHerbert Xu } 62121380b81SHerbert Xu 6221da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 6231da177e4SLinus Torvalds { 6241da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 6251da177e4SLinus Torvalds __xfrm_state_destroy(x); 6261da177e4SLinus Torvalds } 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 6291da177e4SLinus Torvalds { 6301da177e4SLinus Torvalds atomic_inc(&x->refcnt); 6311da177e4SLinus Torvalds } 6321da177e4SLinus Torvalds 6331da177e4SLinus Torvalds static __inline__ int addr_match(void *token1, void *token2, int prefixlen) 6341da177e4SLinus Torvalds { 6355f19343fSAl Viro __be32 *a1 = token1; 6365f19343fSAl Viro __be32 *a2 = token2; 6371da177e4SLinus Torvalds int pdw; 6381da177e4SLinus Torvalds int pbi; 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ 6411da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 6421da177e4SLinus Torvalds 6431da177e4SLinus Torvalds if (pdw) 6441da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 6451da177e4SLinus Torvalds return 0; 6461da177e4SLinus Torvalds 6471da177e4SLinus Torvalds if (pbi) { 6485f19343fSAl Viro __be32 mask; 6491da177e4SLinus Torvalds 6501da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 6511da177e4SLinus Torvalds 6521da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 6531da177e4SLinus Torvalds return 0; 6541da177e4SLinus Torvalds } 6551da177e4SLinus Torvalds 6561da177e4SLinus Torvalds return 1; 6571da177e4SLinus Torvalds } 6581da177e4SLinus Torvalds 6591da177e4SLinus Torvalds static __inline__ 660f9d07e41SAl Viro __be16 xfrm_flowi_sport(struct flowi *fl) 6611da177e4SLinus Torvalds { 662f9d07e41SAl Viro __be16 port; 6631da177e4SLinus Torvalds switch(fl->proto) { 6641da177e4SLinus Torvalds case IPPROTO_TCP: 6651da177e4SLinus Torvalds case IPPROTO_UDP: 666ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 6671da177e4SLinus Torvalds case IPPROTO_SCTP: 6681da177e4SLinus Torvalds port = fl->fl_ip_sport; 6691da177e4SLinus Torvalds break; 6701da177e4SLinus Torvalds case IPPROTO_ICMP: 6711da177e4SLinus Torvalds case IPPROTO_ICMPV6: 6721da177e4SLinus Torvalds port = htons(fl->fl_icmp_type); 6731da177e4SLinus Torvalds break; 6742ce4272aSMasahide NAKAMURA case IPPROTO_MH: 6752ce4272aSMasahide NAKAMURA port = htons(fl->fl_mh_type); 6762ce4272aSMasahide NAKAMURA break; 6771da177e4SLinus Torvalds default: 6781da177e4SLinus Torvalds port = 0; /*XXX*/ 6791da177e4SLinus Torvalds } 6801da177e4SLinus Torvalds return port; 6811da177e4SLinus Torvalds } 6821da177e4SLinus Torvalds 6831da177e4SLinus Torvalds static __inline__ 684f9d07e41SAl Viro __be16 xfrm_flowi_dport(struct flowi *fl) 6851da177e4SLinus Torvalds { 686f9d07e41SAl Viro __be16 port; 6871da177e4SLinus Torvalds switch(fl->proto) { 6881da177e4SLinus Torvalds case IPPROTO_TCP: 6891da177e4SLinus Torvalds case IPPROTO_UDP: 690ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 6911da177e4SLinus Torvalds case IPPROTO_SCTP: 6921da177e4SLinus Torvalds port = fl->fl_ip_dport; 6931da177e4SLinus Torvalds break; 6941da177e4SLinus Torvalds case IPPROTO_ICMP: 6951da177e4SLinus Torvalds case IPPROTO_ICMPV6: 6961da177e4SLinus Torvalds port = htons(fl->fl_icmp_code); 6971da177e4SLinus Torvalds break; 6981da177e4SLinus Torvalds default: 6991da177e4SLinus Torvalds port = 0; /*XXX*/ 7001da177e4SLinus Torvalds } 7011da177e4SLinus Torvalds return port; 7021da177e4SLinus Torvalds } 7031da177e4SLinus Torvalds 70477681021SAndrew Morton extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, 70577681021SAndrew Morton unsigned short family); 7061da177e4SLinus Torvalds 707df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 708df71837dSTrent Jaeger /* If neither has a context --> match 709df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 710df71837dSTrent Jaeger */ 711df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 712df71837dSTrent Jaeger { 713df71837dSTrent Jaeger return ((!s1 && !s2) || 714df71837dSTrent Jaeger (s1 && s2 && 715df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 716df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 717df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 718df71837dSTrent Jaeger } 719df71837dSTrent Jaeger #else 720df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 721df71837dSTrent Jaeger { 722df71837dSTrent Jaeger return 1; 723df71837dSTrent Jaeger } 724df71837dSTrent Jaeger #endif 725df71837dSTrent Jaeger 7261da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 7271da177e4SLinus Torvalds * 7281da177e4SLinus Torvalds * dst->child points to the next element of bundle. 7291da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 7301da177e4SLinus Torvalds * 7311da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 7321da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 7331da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 7341da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 7351da177e4SLinus Torvalds * policy rule. 7361da177e4SLinus Torvalds */ 7371da177e4SLinus Torvalds struct xfrm_dst 7381da177e4SLinus Torvalds { 7391da177e4SLinus Torvalds union { 7401da177e4SLinus Torvalds struct dst_entry dst; 7411da177e4SLinus Torvalds struct rtable rt; 7421da177e4SLinus Torvalds struct rt6_info rt6; 7431da177e4SLinus Torvalds } u; 7441da177e4SLinus Torvalds struct dst_entry *route; 745157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 746157bfc25SMasahide NAKAMURA struct flowi *origin; 747157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 748157bfc25SMasahide NAKAMURA #endif 7499d4a706dSDavid S. Miller u32 genid; 7501da177e4SLinus Torvalds u32 route_mtu_cached; 7511da177e4SLinus Torvalds u32 child_mtu_cached; 75292d63decSHideaki YOSHIFUJI u32 route_cookie; 75392d63decSHideaki YOSHIFUJI u32 path_cookie; 7541da177e4SLinus Torvalds }; 7551da177e4SLinus Torvalds 756aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 757aabc9761SHerbert Xu { 758aabc9761SHerbert Xu dst_release(xdst->route); 759aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 760aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 761157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 762157bfc25SMasahide NAKAMURA kfree(xdst->origin); 763157bfc25SMasahide NAKAMURA xdst->origin = NULL; 764157bfc25SMasahide NAKAMURA kfree(xdst->partner); 765157bfc25SMasahide NAKAMURA xdst->partner = NULL; 766157bfc25SMasahide NAKAMURA #endif 767aabc9761SHerbert Xu } 768aabc9761SHerbert Xu 769aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 770aabc9761SHerbert Xu 7711da177e4SLinus Torvalds struct sec_path 7721da177e4SLinus Torvalds { 7731da177e4SLinus Torvalds atomic_t refcnt; 7741da177e4SLinus Torvalds int len; 775dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 7761da177e4SLinus Torvalds }; 7771da177e4SLinus Torvalds 7781da177e4SLinus Torvalds static inline struct sec_path * 7791da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 7801da177e4SLinus Torvalds { 7811da177e4SLinus Torvalds if (sp) 7821da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 7831da177e4SLinus Torvalds return sp; 7841da177e4SLinus Torvalds } 7851da177e4SLinus Torvalds 7861da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 7871da177e4SLinus Torvalds 7881da177e4SLinus Torvalds static inline void 7891da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 7901da177e4SLinus Torvalds { 7911da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 7921da177e4SLinus Torvalds __secpath_destroy(sp); 7931da177e4SLinus Torvalds } 7941da177e4SLinus Torvalds 7951da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 7961da177e4SLinus Torvalds 7971da177e4SLinus Torvalds static inline void 7981da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 7991da177e4SLinus Torvalds { 8001da177e4SLinus Torvalds #ifdef CONFIG_XFRM 8011da177e4SLinus Torvalds secpath_put(skb->sp); 8021da177e4SLinus Torvalds skb->sp = NULL; 8031da177e4SLinus Torvalds #endif 8041da177e4SLinus Torvalds } 8051da177e4SLinus Torvalds 8061da177e4SLinus Torvalds static inline int 807a1e59abfSPatrick McHardy xfrm_addr_any(xfrm_address_t *addr, unsigned short family) 808a1e59abfSPatrick McHardy { 809a1e59abfSPatrick McHardy switch (family) { 810a1e59abfSPatrick McHardy case AF_INET: 811a1e59abfSPatrick McHardy return addr->a4 == 0; 812a1e59abfSPatrick McHardy case AF_INET6: 813a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 814a1e59abfSPatrick McHardy } 815a1e59abfSPatrick McHardy return 0; 816a1e59abfSPatrick McHardy } 817a1e59abfSPatrick McHardy 818a1e59abfSPatrick McHardy static inline int 8191da177e4SLinus Torvalds __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 8201da177e4SLinus Torvalds { 8211da177e4SLinus Torvalds return (tmpl->saddr.a4 && 8221da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 8231da177e4SLinus Torvalds } 8241da177e4SLinus Torvalds 8251da177e4SLinus Torvalds static inline int 8261da177e4SLinus Torvalds __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 8271da177e4SLinus Torvalds { 8281da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 8291da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 8301da177e4SLinus Torvalds } 8311da177e4SLinus Torvalds 8321da177e4SLinus Torvalds static inline int 8331da177e4SLinus Torvalds xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) 8341da177e4SLinus Torvalds { 8351da177e4SLinus Torvalds switch (family) { 8361da177e4SLinus Torvalds case AF_INET: 8371da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 8381da177e4SLinus Torvalds case AF_INET6: 8391da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 8401da177e4SLinus Torvalds } 8411da177e4SLinus Torvalds return !0; 8421da177e4SLinus Torvalds } 8431da177e4SLinus Torvalds 8441da177e4SLinus Torvalds #ifdef CONFIG_XFRM 8451da177e4SLinus Torvalds 8461da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 8471da177e4SLinus Torvalds 8481da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 8491da177e4SLinus Torvalds { 8501da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 8511da177e4SLinus Torvalds return __xfrm_policy_check(sk, dir, skb, family); 8521da177e4SLinus Torvalds 8532518c7c2SDavid S. Miller return (!xfrm_policy_count[dir] && !skb->sp) || 8541da177e4SLinus Torvalds (skb->dst->flags & DST_NOPOLICY) || 8551da177e4SLinus Torvalds __xfrm_policy_check(sk, dir, skb, family); 8561da177e4SLinus Torvalds } 8571da177e4SLinus Torvalds 8581da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 8591da177e4SLinus Torvalds { 8601da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 8611da177e4SLinus Torvalds } 8621da177e4SLinus Torvalds 8631da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 8641da177e4SLinus Torvalds { 8651da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 8661da177e4SLinus Torvalds } 8671da177e4SLinus Torvalds 8683e3850e9SPatrick McHardy extern int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family); 8691da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 8701da177e4SLinus Torvalds 8711da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 8721da177e4SLinus Torvalds { 8732518c7c2SDavid S. Miller return !xfrm_policy_count[XFRM_POLICY_OUT] || 8741da177e4SLinus Torvalds (skb->dst->flags & DST_NOXFRM) || 8751da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 8761da177e4SLinus Torvalds } 8771da177e4SLinus Torvalds 8781da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 8791da177e4SLinus Torvalds { 8801da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 8811da177e4SLinus Torvalds } 8821da177e4SLinus Torvalds 8831da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 8841da177e4SLinus Torvalds { 8851da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 8861da177e4SLinus Torvalds } 8871da177e4SLinus Torvalds 8881da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 8891da177e4SLinus Torvalds 8901da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 8911da177e4SLinus Torvalds { 8921da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 8931da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 8941da177e4SLinus Torvalds return 0; 8951da177e4SLinus Torvalds } 8961da177e4SLinus Torvalds 8974666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 8981da177e4SLinus Torvalds 8991da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 9001da177e4SLinus Torvalds { 9011da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 9021da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 9031da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 9041da177e4SLinus Torvalds } 9051da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 9061da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 9071da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 9081da177e4SLinus Torvalds } 9091da177e4SLinus Torvalds } 9101da177e4SLinus Torvalds 9111da177e4SLinus Torvalds #else 9121da177e4SLinus Torvalds 9131da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 9141da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 9151da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 9161da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 9171da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 9181da177e4SLinus Torvalds { 9191da177e4SLinus Torvalds return 1; 9201da177e4SLinus Torvalds } 9211da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 9221da177e4SLinus Torvalds { 9231da177e4SLinus Torvalds return 1; 9241da177e4SLinus Torvalds } 9251da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 9261da177e4SLinus Torvalds { 9271da177e4SLinus Torvalds return 1; 9281da177e4SLinus Torvalds } 9291da177e4SLinus Torvalds #endif 9301da177e4SLinus Torvalds 9311da177e4SLinus Torvalds static __inline__ 9321da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) 9331da177e4SLinus Torvalds { 9341da177e4SLinus Torvalds switch (family){ 9351da177e4SLinus Torvalds case AF_INET: 9361da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_dst; 9371da177e4SLinus Torvalds case AF_INET6: 9381da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_dst; 9391da177e4SLinus Torvalds } 9401da177e4SLinus Torvalds return NULL; 9411da177e4SLinus Torvalds } 9421da177e4SLinus Torvalds 9431da177e4SLinus Torvalds static __inline__ 9441da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) 9451da177e4SLinus Torvalds { 9461da177e4SLinus Torvalds switch (family){ 9471da177e4SLinus Torvalds case AF_INET: 9481da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_src; 9491da177e4SLinus Torvalds case AF_INET6: 9501da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_src; 9511da177e4SLinus Torvalds } 9521da177e4SLinus Torvalds return NULL; 9531da177e4SLinus Torvalds } 9541da177e4SLinus Torvalds 9551da177e4SLinus Torvalds static __inline__ int 9561da177e4SLinus Torvalds __xfrm4_state_addr_check(struct xfrm_state *x, 9571da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 9581da177e4SLinus Torvalds { 9591da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 9601da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 9611da177e4SLinus Torvalds return 1; 9621da177e4SLinus Torvalds return 0; 9631da177e4SLinus Torvalds } 9641da177e4SLinus Torvalds 9651da177e4SLinus Torvalds static __inline__ int 9661da177e4SLinus Torvalds __xfrm6_state_addr_check(struct xfrm_state *x, 9671da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 9681da177e4SLinus Torvalds { 9691da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 9701da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 9711da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 9721da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 9731da177e4SLinus Torvalds return 1; 9741da177e4SLinus Torvalds return 0; 9751da177e4SLinus Torvalds } 9761da177e4SLinus Torvalds 9771da177e4SLinus Torvalds static __inline__ int 9781da177e4SLinus Torvalds xfrm_state_addr_check(struct xfrm_state *x, 9791da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 9801da177e4SLinus Torvalds unsigned short family) 9811da177e4SLinus Torvalds { 9821da177e4SLinus Torvalds switch (family) { 9831da177e4SLinus Torvalds case AF_INET: 9841da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 9851da177e4SLinus Torvalds case AF_INET6: 9861da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 9871da177e4SLinus Torvalds } 9881da177e4SLinus Torvalds return 0; 9891da177e4SLinus Torvalds } 9901da177e4SLinus Torvalds 991e53820deSMasahide NAKAMURA static __inline__ int 992e53820deSMasahide NAKAMURA xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, 993e53820deSMasahide NAKAMURA unsigned short family) 994e53820deSMasahide NAKAMURA { 995e53820deSMasahide NAKAMURA switch (family) { 996e53820deSMasahide NAKAMURA case AF_INET: 997e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 998e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_dst, 999e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_src); 1000e53820deSMasahide NAKAMURA case AF_INET6: 1001e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 1002e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_dst, 1003e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_src); 1004e53820deSMasahide NAKAMURA } 1005e53820deSMasahide NAKAMURA return 0; 1006e53820deSMasahide NAKAMURA } 1007e53820deSMasahide NAKAMURA 10081da177e4SLinus Torvalds static inline int xfrm_state_kern(struct xfrm_state *x) 10091da177e4SLinus Torvalds { 10101da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 10111da177e4SLinus Torvalds } 10121da177e4SLinus Torvalds 10135794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 10145794708fSMasahide NAKAMURA { 1015dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1016dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1017dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1018dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 10195794708fSMasahide NAKAMURA } 10205794708fSMasahide NAKAMURA 10211da177e4SLinus Torvalds /* 10221da177e4SLinus Torvalds * xfrm algorithm information 10231da177e4SLinus Torvalds */ 10241da177e4SLinus Torvalds struct xfrm_algo_auth_info { 10251da177e4SLinus Torvalds u16 icv_truncbits; 10261da177e4SLinus Torvalds u16 icv_fullbits; 10271da177e4SLinus Torvalds }; 10281da177e4SLinus Torvalds 10291da177e4SLinus Torvalds struct xfrm_algo_encr_info { 10301da177e4SLinus Torvalds u16 blockbits; 10311da177e4SLinus Torvalds u16 defkeybits; 10321da177e4SLinus Torvalds }; 10331da177e4SLinus Torvalds 10341da177e4SLinus Torvalds struct xfrm_algo_comp_info { 10351da177e4SLinus Torvalds u16 threshold; 10361da177e4SLinus Torvalds }; 10371da177e4SLinus Torvalds 10381da177e4SLinus Torvalds struct xfrm_algo_desc { 10391da177e4SLinus Torvalds char *name; 104004ff1260SHerbert Xu char *compat; 10411da177e4SLinus Torvalds u8 available:1; 10421da177e4SLinus Torvalds union { 10431da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 10441da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 10451da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 10461da177e4SLinus Torvalds } uinfo; 10471da177e4SLinus Torvalds struct sadb_alg desc; 10481da177e4SLinus Torvalds }; 10491da177e4SLinus Torvalds 10501da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 10511da177e4SLinus Torvalds struct xfrm_tunnel { 10521da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1053d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, __u32 info); 1054d2acc347SHerbert Xu 1055d2acc347SHerbert Xu struct xfrm_tunnel *next; 1056d2acc347SHerbert Xu int priority; 10571da177e4SLinus Torvalds }; 10581da177e4SLinus Torvalds 10591da177e4SLinus Torvalds struct xfrm6_tunnel { 1060d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1061d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 106204ce6909SAl Viro int type, int code, int offset, __be32 info); 1063d2acc347SHerbert Xu struct xfrm6_tunnel *next; 1064d2acc347SHerbert Xu int priority; 10651da177e4SLinus Torvalds }; 10661da177e4SLinus Torvalds 10671da177e4SLinus Torvalds extern void xfrm_init(void); 10681da177e4SLinus Torvalds extern void xfrm4_init(void); 10691da177e4SLinus Torvalds extern void xfrm6_init(void); 10701da177e4SLinus Torvalds extern void xfrm6_fini(void); 10711da177e4SLinus Torvalds extern void xfrm_state_init(void); 10721da177e4SLinus Torvalds extern void xfrm4_state_init(void); 10731da177e4SLinus Torvalds extern void xfrm6_state_init(void); 10741da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 10751da177e4SLinus Torvalds 10761da177e4SLinus Torvalds extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *); 10771da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_alloc(void); 10781da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, 10791da177e4SLinus Torvalds struct flowi *fl, struct xfrm_tmpl *tmpl, 10801da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 10811da177e4SLinus Torvalds unsigned short family); 1082628529b6SJamal Hadi Salim extern struct xfrm_state * xfrm_stateonly_find(xfrm_address_t *daddr, 1083628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1084628529b6SJamal Hadi Salim unsigned short family, 1085628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 10861da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 10871da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 10881da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 10891da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1090a94cfd19SAl Viro extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family); 1091eb2971b6SMasahide NAKAMURA extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); 109241a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 109341a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 109441a49cc3SMasahide NAKAMURA int n, unsigned short family); 109541a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 109641a49cc3SMasahide NAKAMURA int n, unsigned short family); 109741a49cc3SMasahide NAKAMURA #else 109841a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 109941a49cc3SMasahide NAKAMURA int n, unsigned short family) 110041a49cc3SMasahide NAKAMURA { 110141a49cc3SMasahide NAKAMURA return -ENOSYS; 110241a49cc3SMasahide NAKAMURA } 110341a49cc3SMasahide NAKAMURA 110441a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 110541a49cc3SMasahide NAKAMURA int n, unsigned short family) 110641a49cc3SMasahide NAKAMURA { 110741a49cc3SMasahide NAKAMURA return -ENOSYS; 110841a49cc3SMasahide NAKAMURA } 110941a49cc3SMasahide NAKAMURA #endif 1110af11e316SJamal Hadi Salim 1111af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1112af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1113af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1114af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1115af11e316SJamal Hadi Salim }; 1116af11e316SJamal Hadi Salim 11175a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 11185a6d3416SJamal Hadi Salim u32 incnt; 11195a6d3416SJamal Hadi Salim u32 outcnt; 11205a6d3416SJamal Hadi Salim u32 fwdcnt; 11215a6d3416SJamal Hadi Salim u32 inscnt; 11225a6d3416SJamal Hadi Salim u32 outscnt; 11235a6d3416SJamal Hadi Salim u32 fwdscnt; 11245a6d3416SJamal Hadi Salim u32 spdhcnt; 11255a6d3416SJamal Hadi Salim u32 spdhmcnt; 11265a6d3416SJamal Hadi Salim }; 11275a6d3416SJamal Hadi Salim 11281da177e4SLinus Torvalds extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq); 112926b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 11304aa2e62cSJoy Latten extern int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info); 1131af11e316SJamal Hadi Salim extern void xfrm_sad_getinfo(struct xfrmk_sadinfo *si); 11325a6d3416SJamal Hadi Salim extern void xfrm_spd_getinfo(struct xfrmk_spdinfo *si); 1133a252cc23SAl Viro extern int xfrm_replay_check(struct xfrm_state *x, __be32 seq); 113461f4627bSAl Viro extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); 1135f8cd5488SJamal Hadi Salim extern void xfrm_replay_notify(struct xfrm_state *x, int event); 11361da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 113772cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1138227620e2SHerbert Xu extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1139716062fdSHerbert Xu extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, 1140716062fdSHerbert Xu int encap_type); 11411bf06cd2SHerbert Xu extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1142c6581a45SHerbert Xu extern int xfrm_output_resume(struct sk_buff *skb, int err); 1143406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 114436cf9acfSHerbert Xu extern int xfrm4_extract_header(struct sk_buff *skb); 1145227620e2SHerbert Xu extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1146c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1147c4541b41SHerbert Xu int encap_type); 1148716062fdSHerbert Xu extern int xfrm4_transport_finish(struct sk_buff *skb, int async); 11491da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1150c4541b41SHerbert Xu 1151c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1152c4541b41SHerbert Xu { 1153c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1154c4541b41SHerbert Xu } 1155c4541b41SHerbert Xu 115636cf9acfSHerbert Xu extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 115736cf9acfSHerbert Xu extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 11581da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 1159c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1160c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 116136cf9acfSHerbert Xu extern int xfrm6_extract_header(struct sk_buff *skb); 1162227620e2SHerbert Xu extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 116333b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1164716062fdSHerbert Xu extern int xfrm6_transport_finish(struct sk_buff *skb, int async); 1165e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1166fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1167fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 116873d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 116973d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 11708c689a6eSAl Viro extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); 11711da177e4SLinus Torvalds extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); 11728c689a6eSAl Viro extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); 117336cf9acfSHerbert Xu extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 117436cf9acfSHerbert Xu extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 11751da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 1176aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1177aee5adb4SMasahide NAKAMURA u8 **prevhdr); 11781da177e4SLinus Torvalds 11791da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1180067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 11811da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 11821da177e4SLinus Torvalds #else 11831da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 11841da177e4SLinus Torvalds { 11851da177e4SLinus Torvalds return -ENOPROTOOPT; 11861da177e4SLinus Torvalds } 11871da177e4SLinus Torvalds 1188067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 11891da177e4SLinus Torvalds { 11901da177e4SLinus Torvalds /* should not happen */ 11911da177e4SLinus Torvalds kfree_skb(skb); 11921da177e4SLinus Torvalds return 0; 11931da177e4SLinus Torvalds } 11941da177e4SLinus Torvalds #endif 11951da177e4SLinus Torvalds 1196dd0fc66fSAl Viro struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp); 11974e81bb83SMasahide NAKAMURA extern int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*), void *); 11981da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 11994e81bb83SMasahide NAKAMURA struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir, 12004e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1201ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1202ef41aaa0SEric Paris int *err); 1203ef41aaa0SEric Paris struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete, int *err); 12044aa2e62cSJoy Latten int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); 12051da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1206658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 12071da177e4SLinus Torvalds struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto, 12081da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 12091da177e4SLinus Torvalds int create, unsigned short family); 12104aa2e62cSJoy Latten extern int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); 12111da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 12125b368e61SVenkat Yekkirala extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, 12135b368e61SVenkat Yekkirala struct flowi *fl, int family, int strict); 12141da177e4SLinus Torvalds 121580c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 121680c9abaaSShinta Sugimoto extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 121780c9abaaSShinta Sugimoto struct xfrm_migrate *m, int num_bundles); 121880c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 121980c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 122080c9abaaSShinta Sugimoto struct xfrm_migrate *m); 122180c9abaaSShinta Sugimoto extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 122280c9abaaSShinta Sugimoto struct xfrm_migrate *m, int num_bundles); 122380c9abaaSShinta Sugimoto #endif 122480c9abaaSShinta Sugimoto 12251da177e4SLinus Torvalds extern wait_queue_head_t km_waitq; 12265d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 12276c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 122897a64b45SMasahide NAKAMURA extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 12291da177e4SLinus Torvalds 12301da177e4SLinus Torvalds extern void xfrm_input_init(void); 12316067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 12321da177e4SLinus Torvalds 12331da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 12341da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 12351da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 12361da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 12371da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 12381da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 12391da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 12401da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 12411da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); 12421da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); 12431da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); 12441da177e4SLinus Torvalds 124507d4ee58SHerbert Xu struct hash_desc; 12469409f38aSHerbert Xu struct scatterlist; 124707d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 124807d4ee58SHerbert Xu unsigned int); 12491da177e4SLinus Torvalds 125007d4ee58SHerbert Xu extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, 12511da177e4SLinus Torvalds int offset, int len, icv_update_fn_t icv_update); 12521da177e4SLinus Torvalds 12531da177e4SLinus Torvalds static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, 12541da177e4SLinus Torvalds int family) 12551da177e4SLinus Torvalds { 12561da177e4SLinus Torvalds switch (family) { 12571da177e4SLinus Torvalds default: 12581da177e4SLinus Torvalds case AF_INET: 12598c689a6eSAl Viro return (__force __u32)a->a4 - (__force __u32)b->a4; 12601da177e4SLinus Torvalds case AF_INET6: 12611da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 12621da177e4SLinus Torvalds (struct in6_addr *)b); 12631da177e4SLinus Torvalds } 12641da177e4SLinus Torvalds } 12651da177e4SLinus Torvalds 126677d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 126777d8d7a6SHerbert Xu { 126877d8d7a6SHerbert Xu return index & 7; 126977d8d7a6SHerbert Xu } 127077d8d7a6SHerbert Xu 1271f8cd5488SJamal Hadi Salim static inline int xfrm_aevent_is_on(void) 1272f8cd5488SJamal Hadi Salim { 1273be33690dSPatrick McHardy struct sock *nlsk; 1274be33690dSPatrick McHardy int ret = 0; 1275be33690dSPatrick McHardy 1276be33690dSPatrick McHardy rcu_read_lock(); 1277be33690dSPatrick McHardy nlsk = rcu_dereference(xfrm_nl); 1278be33690dSPatrick McHardy if (nlsk) 1279be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1280be33690dSPatrick McHardy rcu_read_unlock(); 1281be33690dSPatrick McHardy return ret; 1282f8cd5488SJamal Hadi Salim } 1283f8cd5488SJamal Hadi Salim 12840f99be0dSEric Dumazet static inline int xfrm_alg_len(struct xfrm_algo *alg) 12850f99be0dSEric Dumazet { 12860f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 12870f99be0dSEric Dumazet } 12880f99be0dSEric Dumazet 128980c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 129080c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 129180c9abaaSShinta Sugimoto { 12920f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 129380c9abaaSShinta Sugimoto } 129480c9abaaSShinta Sugimoto 129580c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 129680c9abaaSShinta Sugimoto { 129780c9abaaSShinta Sugimoto int i; 129880c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 129980c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 130080c9abaaSShinta Sugimoto } 130180c9abaaSShinta Sugimoto 130280c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 130380c9abaaSShinta Sugimoto { 130480c9abaaSShinta Sugimoto int i; 130580c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 130680c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 130780c9abaaSShinta Sugimoto } 130880c9abaaSShinta Sugimoto #endif 1309f8cd5488SJamal Hadi Salim 13101da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1311