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 */ 1869afaca05SMasahide NAKAMURA u64 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; 26117c2a42aSHerbert Xu struct module *owner; 262aa5d62ccSHerbert Xu struct xfrm_type *type_map[IPPROTO_MAX]; 263aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 264d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 2651da177e4SLinus Torvalds void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, 2661da177e4SLinus Torvalds struct xfrm_tmpl *tmpl, 2671da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr); 26841a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 26941a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 270cdca7265SMiika Komu int (*output)(struct sk_buff *skb); 27136cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 27236cf9acfSHerbert Xu struct sk_buff *skb); 2731da177e4SLinus Torvalds }; 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 2761da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 2771da177e4SLinus Torvalds 2781da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 2791da177e4SLinus Torvalds 2801da177e4SLinus Torvalds struct xfrm_type 2811da177e4SLinus Torvalds { 2821da177e4SLinus Torvalds char *description; 2831da177e4SLinus Torvalds struct module *owner; 2841da177e4SLinus Torvalds __u8 proto; 2851b5c2299SMasahide NAKAMURA __u8 flags; 2861b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 287436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 288f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 289f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 2901da177e4SLinus Torvalds 29172cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 2921da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 293e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 2941da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 295df0ba92aSMasahide NAKAMURA int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); 296aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 2971da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 298c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 2991da177e4SLinus Torvalds }; 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds extern int xfrm_register_type(struct xfrm_type *type, unsigned short family); 3021da177e4SLinus Torvalds extern int xfrm_unregister_type(struct xfrm_type *type, unsigned short family); 3031da177e4SLinus Torvalds 304b59f45d0SHerbert Xu struct xfrm_mode { 305b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 30637fedd3aSHerbert Xu 30737fedd3aSHerbert Xu /* 30837fedd3aSHerbert Xu * Add encapsulation header. 30937fedd3aSHerbert Xu * 31037fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 31137fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 31237fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 31337fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 31437fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 31537fedd3aSHerbert Xu * header. The value of the network header will always point 31637fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 31737fedd3aSHerbert Xu */ 31836cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 31936cf9acfSHerbert Xu 32036cf9acfSHerbert Xu /* 32136cf9acfSHerbert Xu * This is the actual output entry point. 32236cf9acfSHerbert Xu * 32336cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 32436cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 32536cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 32636cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 32736cf9acfSHerbert Xu * call output2. 32836cf9acfSHerbert Xu */ 329eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 330b59f45d0SHerbert Xu 33117c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 332b59f45d0SHerbert Xu struct module *owner; 333b59f45d0SHerbert Xu unsigned int encap; 3341bfcb10fSHerbert Xu int flags; 3351bfcb10fSHerbert Xu }; 3361bfcb10fSHerbert Xu 3371bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 3381bfcb10fSHerbert Xu enum { 3391bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 340b59f45d0SHerbert Xu }; 341b59f45d0SHerbert Xu 342b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 343b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 344b59f45d0SHerbert Xu 3451da177e4SLinus Torvalds struct xfrm_tmpl 3461da177e4SLinus Torvalds { 3471da177e4SLinus Torvalds /* id in template is interpreted as: 3481da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 3491da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 3501da177e4SLinus Torvalds * daddr must be fixed too. 3511da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 3521da177e4SLinus Torvalds */ 3531da177e4SLinus Torvalds struct xfrm_id id; 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 3561da177e4SLinus Torvalds xfrm_address_t saddr; 3571da177e4SLinus Torvalds 35876b3f055SMiika Komu unsigned short encap_family; 35976b3f055SMiika Komu 3601da177e4SLinus Torvalds __u32 reqid; 3611da177e4SLinus Torvalds 3627e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 3631da177e4SLinus Torvalds __u8 mode; 3641da177e4SLinus Torvalds 3651da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 3661da177e4SLinus Torvalds __u8 share; 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 3691da177e4SLinus Torvalds __u8 optional; 3701da177e4SLinus Torvalds 3711da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 3721da177e4SLinus Torvalds __u32 aalgos; 3731da177e4SLinus Torvalds __u32 ealgos; 3741da177e4SLinus Torvalds __u32 calgos; 3751da177e4SLinus Torvalds }; 3761da177e4SLinus Torvalds 377622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 3781da177e4SLinus Torvalds 3791da177e4SLinus Torvalds struct xfrm_policy 3801da177e4SLinus Torvalds { 3811da177e4SLinus Torvalds struct xfrm_policy *next; 3822518c7c2SDavid S. Miller struct hlist_node bydst; 3832518c7c2SDavid S. Miller struct hlist_node byidx; 3841da177e4SLinus Torvalds 3851da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 3861da177e4SLinus Torvalds rwlock_t lock; 3871da177e4SLinus Torvalds atomic_t refcnt; 3881da177e4SLinus Torvalds struct timer_list timer; 3891da177e4SLinus Torvalds 3901da177e4SLinus Torvalds u32 priority; 3911da177e4SLinus Torvalds u32 index; 3921da177e4SLinus Torvalds struct xfrm_selector selector; 3931da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 3941da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 3951da177e4SLinus Torvalds struct dst_entry *bundles; 39646ca5f5dSArnaldo Carvalho de Melo u16 family; 39746ca5f5dSArnaldo Carvalho de Melo u8 type; 39846ca5f5dSArnaldo Carvalho de Melo u8 action; 39946ca5f5dSArnaldo Carvalho de Melo u8 flags; 40046ca5f5dSArnaldo Carvalho de Melo u8 dead; 40146ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 40246ca5f5dSArnaldo Carvalho de Melo /* XXX 1 byte hole, try to pack */ 403df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 4041da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 4051da177e4SLinus Torvalds }; 4061da177e4SLinus Torvalds 40780c9abaaSShinta Sugimoto struct xfrm_migrate { 40880c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 40980c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 41080c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 41180c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 41280c9abaaSShinta Sugimoto u8 proto; 41380c9abaaSShinta Sugimoto u8 mode; 41480c9abaaSShinta Sugimoto u16 reserved; 41580c9abaaSShinta Sugimoto u32 reqid; 41680c9abaaSShinta Sugimoto u16 old_family; 41780c9abaaSShinta Sugimoto u16 new_family; 41880c9abaaSShinta Sugimoto }; 41980c9abaaSShinta Sugimoto 4201da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 421f8cd5488SJamal Hadi Salim /* which seqno */ 422f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 423f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 424f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 425f8cd5488SJamal Hadi Salim /* what happened */ 426f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 427f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 428f8cd5488SJamal Hadi Salim 429f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 430f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 431f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 432f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 433f8cd5488SJamal Hadi Salim /* default seq threshold size */ 434f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 4351da177e4SLinus Torvalds 4361da177e4SLinus Torvalds struct xfrm_mgr 4371da177e4SLinus Torvalds { 4381da177e4SLinus Torvalds struct list_head list; 4391da177e4SLinus Torvalds char *id; 44026b15dadSJamal Hadi Salim int (*notify)(struct xfrm_state *x, struct km_event *c); 4411da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 442cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 4435d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 44426b15dadSJamal Hadi Salim int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); 44597a64b45SMasahide NAKAMURA int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 44680c9abaaSShinta Sugimoto int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles); 4471da177e4SLinus Torvalds }; 4481da177e4SLinus Torvalds 4491da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 4501da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 4511da177e4SLinus Torvalds 4522518c7c2SDavid S. Miller extern unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2]; 4531da177e4SLinus Torvalds 454436a0a40SHerbert Xu /* 455436a0a40SHerbert Xu * This structure is used for the duration where packets are being 456436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 457436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 458436a0a40SHerbert Xu */ 459436a0a40SHerbert Xu struct xfrm_skb_cb { 460436a0a40SHerbert Xu union { 461436a0a40SHerbert Xu struct inet_skb_parm h4; 462436a0a40SHerbert Xu struct inet6_skb_parm h6; 463436a0a40SHerbert Xu } header; 464436a0a40SHerbert Xu 465436a0a40SHerbert Xu /* Sequence number for replay protection. */ 466436a0a40SHerbert Xu u64 seq; 467436a0a40SHerbert Xu }; 468436a0a40SHerbert Xu 469436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 470436a0a40SHerbert Xu 47136cf9acfSHerbert Xu /* 47236cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 47336cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 47436cf9acfSHerbert Xu */ 47536cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 47636cf9acfSHerbert Xu union { 47736cf9acfSHerbert Xu struct inet_skb_parm h4; 47836cf9acfSHerbert Xu struct inet6_skb_parm h6; 47936cf9acfSHerbert Xu } header; 48036cf9acfSHerbert Xu 48136cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 48236cf9acfSHerbert Xu __be16 id; 48336cf9acfSHerbert Xu __be16 frag_off; 48436cf9acfSHerbert Xu 48536cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 48636cf9acfSHerbert Xu u8 tos; 48736cf9acfSHerbert Xu 48836cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 48936cf9acfSHerbert Xu u8 ttl; 49036cf9acfSHerbert Xu 49136cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 49236cf9acfSHerbert Xu u8 protocol; 49336cf9acfSHerbert Xu 49436cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 49536cf9acfSHerbert Xu u8 flow_lbl[3]; 49636cf9acfSHerbert Xu }; 49736cf9acfSHerbert Xu 49836cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 49936cf9acfSHerbert Xu 500161a09e7SJoy Latten /* Audit Information */ 501161a09e7SJoy Latten struct xfrm_audit 502161a09e7SJoy Latten { 503ab5f5e8bSJoy Latten u32 loginuid; 504161a09e7SJoy Latten u32 secid; 505161a09e7SJoy Latten }; 506c9204d9cSJoy Latten 507c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 508ab5f5e8bSJoy Latten static inline struct audit_buffer *xfrm_audit_start(u32 auid, u32 sid) 509ab5f5e8bSJoy Latten { 510ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 511ab5f5e8bSJoy Latten char *secctx; 512ab5f5e8bSJoy Latten u32 secctx_len; 513ab5f5e8bSJoy Latten 514ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 515ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 516ab5f5e8bSJoy Latten if (audit_buf == NULL) 517ab5f5e8bSJoy Latten return NULL; 518ab5f5e8bSJoy Latten 519ab5f5e8bSJoy Latten audit_log_format(audit_buf, "auid=%u", auid); 520ab5f5e8bSJoy Latten 521ab5f5e8bSJoy Latten if (sid != 0 && 522ab5f5e8bSJoy Latten security_secid_to_secctx(sid, &secctx, &secctx_len) == 0) { 523ab5f5e8bSJoy Latten audit_log_format(audit_buf, " subj=%s", secctx); 524ab5f5e8bSJoy Latten security_release_secctx(secctx, secctx_len); 525ab5f5e8bSJoy Latten } else 526ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 527ab5f5e8bSJoy Latten return audit_buf; 528ab5f5e8bSJoy Latten } 529ab5f5e8bSJoy Latten 530ab5f5e8bSJoy Latten extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 531ab5f5e8bSJoy Latten u32 auid, u32 sid); 532ab5f5e8bSJoy Latten extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 533ab5f5e8bSJoy Latten u32 auid, u32 sid); 534ab5f5e8bSJoy Latten extern void xfrm_audit_state_add(struct xfrm_state *x, int result, 535ab5f5e8bSJoy Latten u32 auid, u32 sid); 536ab5f5e8bSJoy Latten extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, 537ab5f5e8bSJoy Latten u32 auid, u32 sid); 538c9204d9cSJoy Latten #else 539ab5f5e8bSJoy Latten #define xfrm_audit_policy_add(x, r, a, s) do { ; } while (0) 540ab5f5e8bSJoy Latten #define xfrm_audit_policy_delete(x, r, a, s) do { ; } while (0) 541ab5f5e8bSJoy Latten #define xfrm_audit_state_add(x, r, a, s) do { ; } while (0) 542ab5f5e8bSJoy Latten #define xfrm_audit_state_delete(x, r, a, s) do { ; } while (0) 543c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 544161a09e7SJoy Latten 5451da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 5461da177e4SLinus Torvalds { 5471da177e4SLinus Torvalds if (likely(policy != NULL)) 5481da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 5491da177e4SLinus Torvalds } 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds extern void __xfrm_policy_destroy(struct xfrm_policy *policy); 5521da177e4SLinus Torvalds 5531da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 5541da177e4SLinus Torvalds { 5551da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 5561da177e4SLinus Torvalds __xfrm_policy_destroy(policy); 5571da177e4SLinus Torvalds } 5581da177e4SLinus Torvalds 5594e81bb83SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 5604e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 5614e81bb83SMasahide NAKAMURA { 5624e81bb83SMasahide NAKAMURA int i; 5634e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 5644e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 5654e81bb83SMasahide NAKAMURA } 5664e81bb83SMasahide NAKAMURA #else 5674e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 5684e81bb83SMasahide NAKAMURA { 5694e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[0]); 5704e81bb83SMasahide NAKAMURA } 5714e81bb83SMasahide NAKAMURA #endif 5724e81bb83SMasahide NAKAMURA 5731da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 5741da177e4SLinus Torvalds 57521380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 57621380b81SHerbert Xu { 57721380b81SHerbert Xu atomic_dec(&x->refcnt); 57821380b81SHerbert Xu } 57921380b81SHerbert Xu 5801da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 5811da177e4SLinus Torvalds { 5821da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 5831da177e4SLinus Torvalds __xfrm_state_destroy(x); 5841da177e4SLinus Torvalds } 5851da177e4SLinus Torvalds 5861da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 5871da177e4SLinus Torvalds { 5881da177e4SLinus Torvalds atomic_inc(&x->refcnt); 5891da177e4SLinus Torvalds } 5901da177e4SLinus Torvalds 5911da177e4SLinus Torvalds static __inline__ int addr_match(void *token1, void *token2, int prefixlen) 5921da177e4SLinus Torvalds { 5935f19343fSAl Viro __be32 *a1 = token1; 5945f19343fSAl Viro __be32 *a2 = token2; 5951da177e4SLinus Torvalds int pdw; 5961da177e4SLinus Torvalds int pbi; 5971da177e4SLinus Torvalds 5981da177e4SLinus Torvalds pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ 5991da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 6001da177e4SLinus Torvalds 6011da177e4SLinus Torvalds if (pdw) 6021da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 6031da177e4SLinus Torvalds return 0; 6041da177e4SLinus Torvalds 6051da177e4SLinus Torvalds if (pbi) { 6065f19343fSAl Viro __be32 mask; 6071da177e4SLinus Torvalds 6081da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 6091da177e4SLinus Torvalds 6101da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 6111da177e4SLinus Torvalds return 0; 6121da177e4SLinus Torvalds } 6131da177e4SLinus Torvalds 6141da177e4SLinus Torvalds return 1; 6151da177e4SLinus Torvalds } 6161da177e4SLinus Torvalds 6171da177e4SLinus Torvalds static __inline__ 618f9d07e41SAl Viro __be16 xfrm_flowi_sport(struct flowi *fl) 6191da177e4SLinus Torvalds { 620f9d07e41SAl Viro __be16 port; 6211da177e4SLinus Torvalds switch(fl->proto) { 6221da177e4SLinus Torvalds case IPPROTO_TCP: 6231da177e4SLinus Torvalds case IPPROTO_UDP: 624ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 6251da177e4SLinus Torvalds case IPPROTO_SCTP: 6261da177e4SLinus Torvalds port = fl->fl_ip_sport; 6271da177e4SLinus Torvalds break; 6281da177e4SLinus Torvalds case IPPROTO_ICMP: 6291da177e4SLinus Torvalds case IPPROTO_ICMPV6: 6301da177e4SLinus Torvalds port = htons(fl->fl_icmp_type); 6311da177e4SLinus Torvalds break; 6322ce4272aSMasahide NAKAMURA case IPPROTO_MH: 6332ce4272aSMasahide NAKAMURA port = htons(fl->fl_mh_type); 6342ce4272aSMasahide NAKAMURA break; 6351da177e4SLinus Torvalds default: 6361da177e4SLinus Torvalds port = 0; /*XXX*/ 6371da177e4SLinus Torvalds } 6381da177e4SLinus Torvalds return port; 6391da177e4SLinus Torvalds } 6401da177e4SLinus Torvalds 6411da177e4SLinus Torvalds static __inline__ 642f9d07e41SAl Viro __be16 xfrm_flowi_dport(struct flowi *fl) 6431da177e4SLinus Torvalds { 644f9d07e41SAl Viro __be16 port; 6451da177e4SLinus Torvalds switch(fl->proto) { 6461da177e4SLinus Torvalds case IPPROTO_TCP: 6471da177e4SLinus Torvalds case IPPROTO_UDP: 648ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 6491da177e4SLinus Torvalds case IPPROTO_SCTP: 6501da177e4SLinus Torvalds port = fl->fl_ip_dport; 6511da177e4SLinus Torvalds break; 6521da177e4SLinus Torvalds case IPPROTO_ICMP: 6531da177e4SLinus Torvalds case IPPROTO_ICMPV6: 6541da177e4SLinus Torvalds port = htons(fl->fl_icmp_code); 6551da177e4SLinus Torvalds break; 6561da177e4SLinus Torvalds default: 6571da177e4SLinus Torvalds port = 0; /*XXX*/ 6581da177e4SLinus Torvalds } 6591da177e4SLinus Torvalds return port; 6601da177e4SLinus Torvalds } 6611da177e4SLinus Torvalds 66277681021SAndrew Morton extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, 66377681021SAndrew Morton unsigned short family); 6641da177e4SLinus Torvalds 665df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 666df71837dSTrent Jaeger /* If neither has a context --> match 667df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 668df71837dSTrent Jaeger */ 669df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 670df71837dSTrent Jaeger { 671df71837dSTrent Jaeger return ((!s1 && !s2) || 672df71837dSTrent Jaeger (s1 && s2 && 673df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 674df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 675df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 676df71837dSTrent Jaeger } 677df71837dSTrent Jaeger #else 678df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 679df71837dSTrent Jaeger { 680df71837dSTrent Jaeger return 1; 681df71837dSTrent Jaeger } 682df71837dSTrent Jaeger #endif 683df71837dSTrent Jaeger 6841da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 6851da177e4SLinus Torvalds * 6861da177e4SLinus Torvalds * dst->child points to the next element of bundle. 6871da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 6881da177e4SLinus Torvalds * 6891da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 6901da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 6911da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 6921da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 6931da177e4SLinus Torvalds * policy rule. 6941da177e4SLinus Torvalds */ 6951da177e4SLinus Torvalds struct xfrm_dst 6961da177e4SLinus Torvalds { 6971da177e4SLinus Torvalds union { 6981da177e4SLinus Torvalds struct dst_entry dst; 6991da177e4SLinus Torvalds struct rtable rt; 7001da177e4SLinus Torvalds struct rt6_info rt6; 7011da177e4SLinus Torvalds } u; 7021da177e4SLinus Torvalds struct dst_entry *route; 703157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 704157bfc25SMasahide NAKAMURA struct flowi *origin; 705157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 706157bfc25SMasahide NAKAMURA #endif 7079d4a706dSDavid S. Miller u32 genid; 7081da177e4SLinus Torvalds u32 route_mtu_cached; 7091da177e4SLinus Torvalds u32 child_mtu_cached; 71092d63decSHideaki YOSHIFUJI u32 route_cookie; 71192d63decSHideaki YOSHIFUJI u32 path_cookie; 7121da177e4SLinus Torvalds }; 7131da177e4SLinus Torvalds 714aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 715aabc9761SHerbert Xu { 716aabc9761SHerbert Xu dst_release(xdst->route); 717aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 718aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 719157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 720157bfc25SMasahide NAKAMURA kfree(xdst->origin); 721157bfc25SMasahide NAKAMURA xdst->origin = NULL; 722157bfc25SMasahide NAKAMURA kfree(xdst->partner); 723157bfc25SMasahide NAKAMURA xdst->partner = NULL; 724157bfc25SMasahide NAKAMURA #endif 725aabc9761SHerbert Xu } 726aabc9761SHerbert Xu 727aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 728aabc9761SHerbert Xu 7291da177e4SLinus Torvalds struct sec_path 7301da177e4SLinus Torvalds { 7311da177e4SLinus Torvalds atomic_t refcnt; 7321da177e4SLinus Torvalds int len; 733dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 7341da177e4SLinus Torvalds }; 7351da177e4SLinus Torvalds 7361da177e4SLinus Torvalds static inline struct sec_path * 7371da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 7381da177e4SLinus Torvalds { 7391da177e4SLinus Torvalds if (sp) 7401da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 7411da177e4SLinus Torvalds return sp; 7421da177e4SLinus Torvalds } 7431da177e4SLinus Torvalds 7441da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 7451da177e4SLinus Torvalds 7461da177e4SLinus Torvalds static inline void 7471da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 7481da177e4SLinus Torvalds { 7491da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 7501da177e4SLinus Torvalds __secpath_destroy(sp); 7511da177e4SLinus Torvalds } 7521da177e4SLinus Torvalds 7531da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 7541da177e4SLinus Torvalds 7551da177e4SLinus Torvalds static inline void 7561da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 7571da177e4SLinus Torvalds { 7581da177e4SLinus Torvalds #ifdef CONFIG_XFRM 7591da177e4SLinus Torvalds secpath_put(skb->sp); 7601da177e4SLinus Torvalds skb->sp = NULL; 7611da177e4SLinus Torvalds #endif 7621da177e4SLinus Torvalds } 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvalds static inline int 765a1e59abfSPatrick McHardy xfrm_addr_any(xfrm_address_t *addr, unsigned short family) 766a1e59abfSPatrick McHardy { 767a1e59abfSPatrick McHardy switch (family) { 768a1e59abfSPatrick McHardy case AF_INET: 769a1e59abfSPatrick McHardy return addr->a4 == 0; 770a1e59abfSPatrick McHardy case AF_INET6: 771a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 772a1e59abfSPatrick McHardy } 773a1e59abfSPatrick McHardy return 0; 774a1e59abfSPatrick McHardy } 775a1e59abfSPatrick McHardy 776a1e59abfSPatrick McHardy static inline int 7771da177e4SLinus Torvalds __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 7781da177e4SLinus Torvalds { 7791da177e4SLinus Torvalds return (tmpl->saddr.a4 && 7801da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 7811da177e4SLinus Torvalds } 7821da177e4SLinus Torvalds 7831da177e4SLinus Torvalds static inline int 7841da177e4SLinus Torvalds __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 7851da177e4SLinus Torvalds { 7861da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 7871da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 7881da177e4SLinus Torvalds } 7891da177e4SLinus Torvalds 7901da177e4SLinus Torvalds static inline int 7911da177e4SLinus Torvalds xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) 7921da177e4SLinus Torvalds { 7931da177e4SLinus Torvalds switch (family) { 7941da177e4SLinus Torvalds case AF_INET: 7951da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 7961da177e4SLinus Torvalds case AF_INET6: 7971da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 7981da177e4SLinus Torvalds } 7991da177e4SLinus Torvalds return !0; 8001da177e4SLinus Torvalds } 8011da177e4SLinus Torvalds 8021da177e4SLinus Torvalds #ifdef CONFIG_XFRM 8031da177e4SLinus Torvalds 8041da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 8051da177e4SLinus Torvalds 8061da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 8071da177e4SLinus Torvalds { 8081da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 8091da177e4SLinus Torvalds return __xfrm_policy_check(sk, dir, skb, family); 8101da177e4SLinus Torvalds 8112518c7c2SDavid S. Miller return (!xfrm_policy_count[dir] && !skb->sp) || 8121da177e4SLinus Torvalds (skb->dst->flags & DST_NOPOLICY) || 8131da177e4SLinus Torvalds __xfrm_policy_check(sk, dir, skb, family); 8141da177e4SLinus Torvalds } 8151da177e4SLinus Torvalds 8161da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 8171da177e4SLinus Torvalds { 8181da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 8191da177e4SLinus Torvalds } 8201da177e4SLinus Torvalds 8211da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 8221da177e4SLinus Torvalds { 8231da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 8241da177e4SLinus Torvalds } 8251da177e4SLinus Torvalds 8263e3850e9SPatrick McHardy extern int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family); 8271da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 8281da177e4SLinus Torvalds 8291da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 8301da177e4SLinus Torvalds { 8312518c7c2SDavid S. Miller return !xfrm_policy_count[XFRM_POLICY_OUT] || 8321da177e4SLinus Torvalds (skb->dst->flags & DST_NOXFRM) || 8331da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 8341da177e4SLinus Torvalds } 8351da177e4SLinus Torvalds 8361da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 8371da177e4SLinus Torvalds { 8381da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 8391da177e4SLinus Torvalds } 8401da177e4SLinus Torvalds 8411da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 8421da177e4SLinus Torvalds { 8431da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 8441da177e4SLinus Torvalds } 8451da177e4SLinus Torvalds 8461da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 8471da177e4SLinus Torvalds 8481da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 8491da177e4SLinus Torvalds { 8501da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 8511da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 8521da177e4SLinus Torvalds return 0; 8531da177e4SLinus Torvalds } 8541da177e4SLinus Torvalds 8554666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 8561da177e4SLinus Torvalds 8571da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 8581da177e4SLinus Torvalds { 8591da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 8601da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 8611da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 8621da177e4SLinus Torvalds } 8631da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 8641da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 8651da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 8661da177e4SLinus Torvalds } 8671da177e4SLinus Torvalds } 8681da177e4SLinus Torvalds 8691da177e4SLinus Torvalds #else 8701da177e4SLinus Torvalds 8711da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 8721da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 8731da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 8741da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 8751da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 8761da177e4SLinus Torvalds { 8771da177e4SLinus Torvalds return 1; 8781da177e4SLinus Torvalds } 8791da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 8801da177e4SLinus Torvalds { 8811da177e4SLinus Torvalds return 1; 8821da177e4SLinus Torvalds } 8831da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 8841da177e4SLinus Torvalds { 8851da177e4SLinus Torvalds return 1; 8861da177e4SLinus Torvalds } 8871da177e4SLinus Torvalds #endif 8881da177e4SLinus Torvalds 8891da177e4SLinus Torvalds static __inline__ 8901da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) 8911da177e4SLinus Torvalds { 8921da177e4SLinus Torvalds switch (family){ 8931da177e4SLinus Torvalds case AF_INET: 8941da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_dst; 8951da177e4SLinus Torvalds case AF_INET6: 8961da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_dst; 8971da177e4SLinus Torvalds } 8981da177e4SLinus Torvalds return NULL; 8991da177e4SLinus Torvalds } 9001da177e4SLinus Torvalds 9011da177e4SLinus Torvalds static __inline__ 9021da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) 9031da177e4SLinus Torvalds { 9041da177e4SLinus Torvalds switch (family){ 9051da177e4SLinus Torvalds case AF_INET: 9061da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_src; 9071da177e4SLinus Torvalds case AF_INET6: 9081da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_src; 9091da177e4SLinus Torvalds } 9101da177e4SLinus Torvalds return NULL; 9111da177e4SLinus Torvalds } 9121da177e4SLinus Torvalds 9131da177e4SLinus Torvalds static __inline__ int 9141da177e4SLinus Torvalds __xfrm4_state_addr_check(struct xfrm_state *x, 9151da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 9161da177e4SLinus Torvalds { 9171da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 9181da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 9191da177e4SLinus Torvalds return 1; 9201da177e4SLinus Torvalds return 0; 9211da177e4SLinus Torvalds } 9221da177e4SLinus Torvalds 9231da177e4SLinus Torvalds static __inline__ int 9241da177e4SLinus Torvalds __xfrm6_state_addr_check(struct xfrm_state *x, 9251da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 9261da177e4SLinus Torvalds { 9271da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 9281da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 9291da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 9301da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 9311da177e4SLinus Torvalds return 1; 9321da177e4SLinus Torvalds return 0; 9331da177e4SLinus Torvalds } 9341da177e4SLinus Torvalds 9351da177e4SLinus Torvalds static __inline__ int 9361da177e4SLinus Torvalds xfrm_state_addr_check(struct xfrm_state *x, 9371da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 9381da177e4SLinus Torvalds unsigned short family) 9391da177e4SLinus Torvalds { 9401da177e4SLinus Torvalds switch (family) { 9411da177e4SLinus Torvalds case AF_INET: 9421da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 9431da177e4SLinus Torvalds case AF_INET6: 9441da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 9451da177e4SLinus Torvalds } 9461da177e4SLinus Torvalds return 0; 9471da177e4SLinus Torvalds } 9481da177e4SLinus Torvalds 949e53820deSMasahide NAKAMURA static __inline__ int 950e53820deSMasahide NAKAMURA xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, 951e53820deSMasahide NAKAMURA unsigned short family) 952e53820deSMasahide NAKAMURA { 953e53820deSMasahide NAKAMURA switch (family) { 954e53820deSMasahide NAKAMURA case AF_INET: 955e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 956e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_dst, 957e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_src); 958e53820deSMasahide NAKAMURA case AF_INET6: 959e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 960e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_dst, 961e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_src); 962e53820deSMasahide NAKAMURA } 963e53820deSMasahide NAKAMURA return 0; 964e53820deSMasahide NAKAMURA } 965e53820deSMasahide NAKAMURA 9661da177e4SLinus Torvalds static inline int xfrm_state_kern(struct xfrm_state *x) 9671da177e4SLinus Torvalds { 9681da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 9691da177e4SLinus Torvalds } 9701da177e4SLinus Torvalds 9715794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 9725794708fSMasahide NAKAMURA { 973dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 974dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 975dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 976dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 9775794708fSMasahide NAKAMURA } 9785794708fSMasahide NAKAMURA 9791da177e4SLinus Torvalds /* 9801da177e4SLinus Torvalds * xfrm algorithm information 9811da177e4SLinus Torvalds */ 9821da177e4SLinus Torvalds struct xfrm_algo_auth_info { 9831da177e4SLinus Torvalds u16 icv_truncbits; 9841da177e4SLinus Torvalds u16 icv_fullbits; 9851da177e4SLinus Torvalds }; 9861da177e4SLinus Torvalds 9871da177e4SLinus Torvalds struct xfrm_algo_encr_info { 9881da177e4SLinus Torvalds u16 blockbits; 9891da177e4SLinus Torvalds u16 defkeybits; 9901da177e4SLinus Torvalds }; 9911da177e4SLinus Torvalds 9921da177e4SLinus Torvalds struct xfrm_algo_comp_info { 9931da177e4SLinus Torvalds u16 threshold; 9941da177e4SLinus Torvalds }; 9951da177e4SLinus Torvalds 9961da177e4SLinus Torvalds struct xfrm_algo_desc { 9971da177e4SLinus Torvalds char *name; 99804ff1260SHerbert Xu char *compat; 9991da177e4SLinus Torvalds u8 available:1; 10001da177e4SLinus Torvalds union { 10011da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 10021da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 10031da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 10041da177e4SLinus Torvalds } uinfo; 10051da177e4SLinus Torvalds struct sadb_alg desc; 10061da177e4SLinus Torvalds }; 10071da177e4SLinus Torvalds 10081da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 10091da177e4SLinus Torvalds struct xfrm_tunnel { 10101da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1011d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, __u32 info); 1012d2acc347SHerbert Xu 1013d2acc347SHerbert Xu struct xfrm_tunnel *next; 1014d2acc347SHerbert Xu int priority; 10151da177e4SLinus Torvalds }; 10161da177e4SLinus Torvalds 10171da177e4SLinus Torvalds struct xfrm6_tunnel { 1018d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1019d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 102004ce6909SAl Viro int type, int code, int offset, __be32 info); 1021d2acc347SHerbert Xu struct xfrm6_tunnel *next; 1022d2acc347SHerbert Xu int priority; 10231da177e4SLinus Torvalds }; 10241da177e4SLinus Torvalds 10251da177e4SLinus Torvalds extern void xfrm_init(void); 10261da177e4SLinus Torvalds extern void xfrm4_init(void); 10271da177e4SLinus Torvalds extern void xfrm6_init(void); 10281da177e4SLinus Torvalds extern void xfrm6_fini(void); 10291da177e4SLinus Torvalds extern void xfrm_state_init(void); 10301da177e4SLinus Torvalds extern void xfrm4_state_init(void); 10311da177e4SLinus Torvalds extern void xfrm6_state_init(void); 10321da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 10331da177e4SLinus Torvalds 10341da177e4SLinus Torvalds extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *); 10351da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_alloc(void); 10361da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, 10371da177e4SLinus Torvalds struct flowi *fl, struct xfrm_tmpl *tmpl, 10381da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 10391da177e4SLinus Torvalds unsigned short family); 1040628529b6SJamal Hadi Salim extern struct xfrm_state * xfrm_stateonly_find(xfrm_address_t *daddr, 1041628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1042628529b6SJamal Hadi Salim unsigned short family, 1043628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 10441da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 10451da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 10461da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 10471da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1048a94cfd19SAl Viro extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family); 1049eb2971b6SMasahide NAKAMURA extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); 105041a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 105141a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 105241a49cc3SMasahide NAKAMURA int n, unsigned short family); 105341a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 105441a49cc3SMasahide NAKAMURA int n, unsigned short family); 105541a49cc3SMasahide NAKAMURA #else 105641a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 105741a49cc3SMasahide NAKAMURA int n, unsigned short family) 105841a49cc3SMasahide NAKAMURA { 105941a49cc3SMasahide NAKAMURA return -ENOSYS; 106041a49cc3SMasahide NAKAMURA } 106141a49cc3SMasahide NAKAMURA 106241a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 106341a49cc3SMasahide NAKAMURA int n, unsigned short family) 106441a49cc3SMasahide NAKAMURA { 106541a49cc3SMasahide NAKAMURA return -ENOSYS; 106641a49cc3SMasahide NAKAMURA } 106741a49cc3SMasahide NAKAMURA #endif 1068af11e316SJamal Hadi Salim 1069af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1070af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1071af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1072af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1073af11e316SJamal Hadi Salim }; 1074af11e316SJamal Hadi Salim 10755a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 10765a6d3416SJamal Hadi Salim u32 incnt; 10775a6d3416SJamal Hadi Salim u32 outcnt; 10785a6d3416SJamal Hadi Salim u32 fwdcnt; 10795a6d3416SJamal Hadi Salim u32 inscnt; 10805a6d3416SJamal Hadi Salim u32 outscnt; 10815a6d3416SJamal Hadi Salim u32 fwdscnt; 10825a6d3416SJamal Hadi Salim u32 spdhcnt; 10835a6d3416SJamal Hadi Salim u32 spdhmcnt; 10845a6d3416SJamal Hadi Salim }; 10855a6d3416SJamal Hadi Salim 10861da177e4SLinus Torvalds extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq); 108726b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 10884aa2e62cSJoy Latten extern int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info); 1089af11e316SJamal Hadi Salim extern void xfrm_sad_getinfo(struct xfrmk_sadinfo *si); 10905a6d3416SJamal Hadi Salim extern void xfrm_spd_getinfo(struct xfrmk_spdinfo *si); 1091a252cc23SAl Viro extern int xfrm_replay_check(struct xfrm_state *x, __be32 seq); 109261f4627bSAl Viro extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); 1093f8cd5488SJamal Hadi Salim extern void xfrm_replay_notify(struct xfrm_state *x, int event); 10941da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 109572cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1096406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 109736cf9acfSHerbert Xu extern int xfrm4_extract_header(struct sk_buff *skb); 1098c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1099c4541b41SHerbert Xu int encap_type); 11001da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1101c4541b41SHerbert Xu 1102c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1103c4541b41SHerbert Xu { 1104c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1105c4541b41SHerbert Xu } 1106c4541b41SHerbert Xu 110736cf9acfSHerbert Xu extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 110836cf9acfSHerbert Xu extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 11091da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 1110c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1111c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 111236cf9acfSHerbert Xu extern int xfrm6_extract_header(struct sk_buff *skb); 111333b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1114e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1115fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1116fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 111773d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 111873d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 11198c689a6eSAl Viro extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); 11201da177e4SLinus Torvalds extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); 11218c689a6eSAl Viro extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); 112236cf9acfSHerbert Xu extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 112336cf9acfSHerbert Xu extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 11241da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 1125aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1126aee5adb4SMasahide NAKAMURA u8 **prevhdr); 11271da177e4SLinus Torvalds 11281da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1129067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 11301da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 11311da177e4SLinus Torvalds #else 11321da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 11331da177e4SLinus Torvalds { 11341da177e4SLinus Torvalds return -ENOPROTOOPT; 11351da177e4SLinus Torvalds } 11361da177e4SLinus Torvalds 1137067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 11381da177e4SLinus Torvalds { 11391da177e4SLinus Torvalds /* should not happen */ 11401da177e4SLinus Torvalds kfree_skb(skb); 11411da177e4SLinus Torvalds return 0; 11421da177e4SLinus Torvalds } 11431da177e4SLinus Torvalds #endif 11441da177e4SLinus Torvalds 1145dd0fc66fSAl Viro struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp); 11464e81bb83SMasahide NAKAMURA extern int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*), void *); 11471da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 11484e81bb83SMasahide NAKAMURA struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir, 11494e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1150ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1151ef41aaa0SEric Paris int *err); 1152ef41aaa0SEric Paris struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete, int *err); 11534aa2e62cSJoy Latten int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); 11541da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1155658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 11561da177e4SLinus Torvalds struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto, 11571da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 11581da177e4SLinus Torvalds int create, unsigned short family); 11594aa2e62cSJoy Latten extern int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); 11601da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 11615b368e61SVenkat Yekkirala extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, 11625b368e61SVenkat Yekkirala struct flowi *fl, int family, int strict); 11631da177e4SLinus Torvalds 116480c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 116580c9abaaSShinta Sugimoto extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 116680c9abaaSShinta Sugimoto struct xfrm_migrate *m, int num_bundles); 116780c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 116880c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 116980c9abaaSShinta Sugimoto struct xfrm_migrate *m); 117080c9abaaSShinta Sugimoto extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 117180c9abaaSShinta Sugimoto struct xfrm_migrate *m, int num_bundles); 117280c9abaaSShinta Sugimoto #endif 117380c9abaaSShinta Sugimoto 11741da177e4SLinus Torvalds extern wait_queue_head_t km_waitq; 11755d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 11766c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 117797a64b45SMasahide NAKAMURA extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 11781da177e4SLinus Torvalds 11791da177e4SLinus Torvalds extern void xfrm_input_init(void); 11806067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 11811da177e4SLinus Torvalds 11821da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 11831da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 11841da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 11851da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 11861da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 11871da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 11881da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 11891da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 11901da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); 11911da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); 11921da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); 11931da177e4SLinus Torvalds 119407d4ee58SHerbert Xu struct hash_desc; 11959409f38aSHerbert Xu struct scatterlist; 119607d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 119707d4ee58SHerbert Xu unsigned int); 11981da177e4SLinus Torvalds 119907d4ee58SHerbert Xu extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, 12001da177e4SLinus Torvalds int offset, int len, icv_update_fn_t icv_update); 12011da177e4SLinus Torvalds 12021da177e4SLinus Torvalds static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, 12031da177e4SLinus Torvalds int family) 12041da177e4SLinus Torvalds { 12051da177e4SLinus Torvalds switch (family) { 12061da177e4SLinus Torvalds default: 12071da177e4SLinus Torvalds case AF_INET: 12088c689a6eSAl Viro return (__force __u32)a->a4 - (__force __u32)b->a4; 12091da177e4SLinus Torvalds case AF_INET6: 12101da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 12111da177e4SLinus Torvalds (struct in6_addr *)b); 12121da177e4SLinus Torvalds } 12131da177e4SLinus Torvalds } 12141da177e4SLinus Torvalds 121577d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 121677d8d7a6SHerbert Xu { 121777d8d7a6SHerbert Xu return index & 7; 121877d8d7a6SHerbert Xu } 121977d8d7a6SHerbert Xu 1220f8cd5488SJamal Hadi Salim static inline int xfrm_aevent_is_on(void) 1221f8cd5488SJamal Hadi Salim { 1222be33690dSPatrick McHardy struct sock *nlsk; 1223be33690dSPatrick McHardy int ret = 0; 1224be33690dSPatrick McHardy 1225be33690dSPatrick McHardy rcu_read_lock(); 1226be33690dSPatrick McHardy nlsk = rcu_dereference(xfrm_nl); 1227be33690dSPatrick McHardy if (nlsk) 1228be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1229be33690dSPatrick McHardy rcu_read_unlock(); 1230be33690dSPatrick McHardy return ret; 1231f8cd5488SJamal Hadi Salim } 1232f8cd5488SJamal Hadi Salim 12330f99be0dSEric Dumazet static inline int xfrm_alg_len(struct xfrm_algo *alg) 12340f99be0dSEric Dumazet { 12350f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 12360f99be0dSEric Dumazet } 12370f99be0dSEric Dumazet 123880c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 123980c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 124080c9abaaSShinta Sugimoto { 12410f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 124280c9abaaSShinta Sugimoto } 124380c9abaaSShinta Sugimoto 124480c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 124580c9abaaSShinta Sugimoto { 124680c9abaaSShinta Sugimoto int i; 124780c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 124880c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 124980c9abaaSShinta Sugimoto } 125080c9abaaSShinta Sugimoto 125180c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 125280c9abaaSShinta Sugimoto { 125380c9abaaSShinta Sugimoto int i; 125480c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 125580c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 125680c9abaaSShinta Sugimoto } 125780c9abaaSShinta Sugimoto #endif 1258f8cd5488SJamal Hadi Salim 12591da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1260